US20100193155A1 - Liquid circulation heating system - Google Patents
Liquid circulation heating system Download PDFInfo
- Publication number
- US20100193155A1 US20100193155A1 US12/693,688 US69368810A US2010193155A1 US 20100193155 A1 US20100193155 A1 US 20100193155A1 US 69368810 A US69368810 A US 69368810A US 2010193155 A1 US2010193155 A1 US 2010193155A1
- Authority
- US
- United States
- Prior art keywords
- liquid
- refrigerant
- radiator
- heat
- heating system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
- C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
- C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
- C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
- F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
- F25B9/006—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant containing more than one component
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/10—Components
- C09K2205/12—Hydrocarbons
- C09K2205/126—Unsaturated fluorinated hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
- C09K2205/22—All components of a mixture being fluoro compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Definitions
- JP 2008-39306 A proposes a liquid circulation heating system for producing hot water by a heat pump and storing the produced hot water in a hot water storage tank.
- the hot water stored in the hot water storage tank is fed to, for example, a heating radiator placed indoors to radiate its heat, and then returned to the hot water storage tank.
- the heat pump has a heat pump circuit for circulating a refrigerant.
- the heat pump circuit includes, for example, a compressor, a radiator, an expansion valve, and an evaporator, which are connected by pipes. Heat is exchanged between a refrigerant and water in the radiator so as to heat the water, and thereby hot water is produced.
- a refrigerant having a low global warming potential (hereinafter referred to as a “GWP”) as a refrigerant to be filled in the heat pump circuit.
- GWP global warming potential
- HFO-1234yf 2,3,3,3-tetrafluoropropene
- JP 2007-315663 A discloses a refrigeration cycle apparatus in which a refrigerant containing HFO-1234yf and trifluoroiodomethane (CF 3 I) is used.
- HFO-1234yf is, however, not suitable for use in heat pumps because of its low heating capability as a heating refrigerant, although it has a low GWP.
- CF 3 I does not act as a refrigerant. Therefore, in JP 2007-315663 A, CF 3 I presumably is added to HFO-1234yf in order to stabilize HFO-1234yf.
- the present invention provides a liquid circulation heating system for performing air-heating by heating a liquid to produce a heated liquid and releasing heat of the heated liquid from a heating radiator.
- This system includes a heat pump circuit for circulating a refrigerant to heat the liquid, and the refrigerant contains tetrafluoropropene and difluoromethane as main components.
- the present invention makes it possible to obtain a liquid circulation heating system having less impact on global warming.
- FIG. 2 is a Mollier diagram of a heat pump.
- FIG. 3 is a graph showing a relationship between the content of difluoromethane in a mixed refrigerant of HFO-1234yf and difluoromethane and the ratio of the heating capacity of a heat pump when using the mixed refrigerant with respect to that when using a HFO-1234yf refrigerant, as well as a relationship between the content of difluoromethane and the GWP of the mixed refrigerant.
- FIG. 5 is a schematic configuration diagram of a liquid circulation heating system according to a second embodiment of the present invention.
- FIG. 7 is a schematic configuration diagram of a heat pump of a modification.
- FIG. 1 shows a liquid circulation heating system 1 A according to a first embodiment of the present invention.
- This liquid circulation heating system 1 A heats a liquid to produce a heated liquid, releases heat of the heated liquid from a heating radiator 3 , and thereby performs air-heating, for example, in a room.
- the liquid circulation heating system 1 A includes the heating radiator 3 , a heat pump 2 for producing the heated liquid, and an overall controller 5 for controlling the entire system.
- the heating radiator 3 is connected directly to the heat pump 2 by a supply pipe 31 and a recovery pipe 32 to be described later, so that the liquid flows without stopping.
- a supply pipe 31 and a recovery pipe 32 to be described later, so that the liquid flows without stopping.
- the liquid for example, an antifreeze liquid containing propylene glycol or the like dissolved in water can be used, but water is preferably used because it is available at low cost and in large quantities. The following description will be made on the assumption that the liquid is water and the heated liquid is hot water.
- the heat pump 2 has a heat pump circuit 20 for circulating a refrigerant.
- This heat pump circuit 20 includes a compressor 21 for compressing the refrigerant, a radiator (refrigerant radiator) 22 for radiating heat from the compressed refrigerant, an expansion valve 23 for expanding the refrigerant that has radiated heat, and an evaporator 24 for evaporating the expanded refrigerant. These components 21 to 24 are connected in series by pipes.
- the heat pump 2 includes a heat pump controller 26 for controlling the compressor 21 and the expansion valve 23 according to an instruction from the overall controller 5 .
- An expander for recovering power from the expanding refrigerant also can be used instead of the expansion valve 23 .
- the radiator 22 heat is exchanged between the refrigerant and the water flowing through the radiator 22 so as to heat the water, and thereby hot water is produced.
- the evaporator 24 heat is exchanged between the refrigerant and air blown by a fan 25 , and thereby the refrigerant absorbs heat.
- the refrigerant will be described later in detail.
- the heating radiator 3 is a device for radiating heat from hot water flowing therethrough, and has an inlet for allowing the hot water to flow thereinto, and an outlet for allowing the hot water that has radiated its heat to flow therefrom.
- a radiator to be placed in a room of a building may be used.
- a hot water panel to be laid on a floor also may be used.
- the overall controller 5 includes a microcomputer, a digital signal processor (DSP), or the like, and is connected to the above-mentioned heat pump controller 26 , the hot water temperature sensor 71 , and the pump 61 , respectively.
- DSP digital signal processor
- the overall controller 5 rotates the pump 61 and sends an operation start signal to the heat pump controller 26 .
- water is heated in the radiator 22 to produce hot water, and the produced hot water is fed to the heating radiator 3 .
- the overall controller 5 controls the rotational rate of the pump 61 to regulate the flow rate of the water flowing through the supply pipe 31 so that the temperature of the water detected by the hot water temperature sensor 71 becomes a predetermined temperature (for example, 70° C.).
- the hot water produced can be used directly for air-heating. Therefore, heat radiation loss is reduced, and as a result, energy conservation can be achieved.
- the refrigerant used in the present embodiment contains tetrafluoropropene and difluoromethane (R32) as main components.
- the phrase “ . . . contains tetrafluoropropene and difluoromethane as main components” means that the total content of tetrafluoropropene and difluoromethane is at least 80% by mass and their respective contents are at least 10% by mass.
- tetrafluoropropene examples include 2,3,3,3-tetrafluoropropene (HFO-1234yf) and 1,3,3,3-tetrafluoropropene (HFO-1234ze).
- the heating capability of a refrigerant to be used is high enough to allow the heat pump to achieve a heating capacity Q comparable to that obtained when using a conventional refrigerant under the same conditions, conventional equipment can be used without modification.
- the content of difluoromethane in the refrigerant preferably is 26 to 34% by mass, and more preferably 28 to 32% by mass.
- FIG. 3 shows a relationship between the content of difluoromethane in a mixed refrigerant of HFO-1234yf and difluoromethane and the ratio of the heating capacity of a heat pump when using the mixed refrigerant with respect to that when using a HFO-1234yf refrigerant, as well as a relationship between the content of difluoromethane and the GWP of the mixed refrigerant.
- the content of difluoromethane in the refrigerant preferably is at least 30% by mass.
- the GWP of the refrigerant is 200 or more.
- the GWP of difluoromethane itself is 675, which is not so high, but when difluoromethane is added to tetrafluoroethane, the GWP of the resulting mixed refrigerant increases in proportion to the content of difluoromethane. Therefore, from the viewpoint of obtaining a mixed refrigerant having a low GWP, the content of difluoromethane preferably is at most 80% by mass. More preferably, the content of difluoromethane is at most 75% by mass, still more preferably at most 70% by mass, particularly preferably at most 65% by mass, and especially preferably at most 60% by mass.
- the temperature of the water that flows from the heating radiator 3 presumably does not drop so much.
- the temperature of the water supplied to the radiator 22 rises.
- the high pressure of the refrigeration cycle increases, as shown by a dotted line in FIG. 2 .
- the high pressure of the refrigeration cycle increases to about 5 MPa.
- the high pressure is calculated by using R134a, which presumably has a heating capability comparable to that of HFO-1234yf.
- the GWP of the refrigerant is about 310 or less.
- the refrigerant further may contain pentafluoroethane (R125). Both tetrafluoropropene and difluoromethane are flammable materials. Therefore, the addition of pentafluoroethane having an effect of suppressing flammability to these materials renders a resulting mixed refrigerant flame-retardant.
- the GWP of pentafluoroethane is 3500, which is a considerably high value
- the content of pentafluoroethane in the mixed refrigerant preferably is at most 10% by mass. More preferably, the content of pentafluoroethane is at most 7% by mass, and still more preferably at most 5% by mass.
- pentafluoroethane as a heating refrigerant is only slightly inferior to that of difluoromethane. Therefore, when pentafluoroethane is added, the content of difluoromethane may be reduced by the amount of pentafluoroethane to be added.
- the above-mentioned refrigerant is filled in the heat pump circuit 20 , together with a refrigerating machine oil.
- a refrigerating machine oil a synthetic oil containing, as a main component, an oxygen-containing compound selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of polyvinyl ethers and polyoxyalkylene glycols or monoethers thereof, polyol esters, polycarbonates, or a synthetic oil containing, as a main component, a compound selected from alkylbenzenes and ⁇ -olefines.
- the liquid circulation heating system 1 B of the second embodiment has the same configuration as the liquid circulation heating system 1 A of the first embodiment, except that the heating radiator 3 and the radiator 22 are connected via the hot water storage tank 8 .
- refrigerant for the heat pump 2 the same refrigerant as that described in the first embodiment also can be used in the present embodiment, and therefore the description of the refrigerant is not repeated here. The same description also is not repeated in the following embodiment and modifications.
- the hot water storage tank 8 is a vertically cylindrical closed casing and is filled with water.
- the lower portion of the hot water storage tank 8 is connected to the radiator 22 by the supply pipe 31 , and the upper portion thereof is connected to the radiator 22 by the recovery pipe 32 .
- the inlet of the heating radiator 3 is connected to the upper portion of the hot water storage tank 8 by a feed pipe 81 , and the outlet of the heating radiator 3 is connected to the lower portion of the hot water storage tank 8 by a return pipe 82 .
- a circulation pump 66 is provided in the return pipe 82 , but the circulation pump 66 may be provided in the feed pipe 81 .
- the circulation pump 66 is connected to the overall controller 5 . When the circulation pump 66 is rotated, the hot water stored in the hot water storage tank 8 is fed to the heating radiator 3 through the feed pipe 81 , and the hot water is returned to the hot water storage tank 8 through the return pipe 82 after radiating heat in the heating radiator 3 .
- the overall controller 5 determines that the amount of hot water remaining in the tank is less than the required amount based on the temperature detected by the hot water temperature sensors 74 , for example, during nighttime hours (for example, from 23:00 to 7:00), it rotates the pump 61 , and sends an operation start signal to the heat pump controller 26 . Thereby, water is heated in the radiator 22 to produce hot water, and the produced hot water is stored in the hot water storage tank 8 .
- the overall controller 5 also controls the rotational rate of the pump 61 to regulate the flow rate of the water flowing through the supply pipe 31 so that the temperature of the water detected by the hot water temperature sensor 71 becomes a predetermined temperature (for example, 70° C.).
- the overall controller 5 rotates the circulation pump 66 .
- the hot water stored in the hot water storage tank 8 is fed to the heating radiator 3 , where heat is radiated from the hot water.
- air-heating is performed.
- liquid circulation heating system 1 B of the second embodiment described above high-temperature hot water stored in the hot water storage tank 8 can be fed to the heating radiator 3 even during the early stage of heating operation. Therefore, air-heating can be started immediately after the heating switch is turned on.
- FIG. 6 shows a liquid circulation heating system 1 C according to a third embodiment of the present invention.
- the same components as those in the first and second embodiments are designated by the same reference numerals and no further description is given.
- hot water stored in the hot water storage tank 8 can be used directly for hot water supply.
- the water inlet pipe 91 is connected to the lower portion of the hot water storage tank 8
- the hot water outlet pipe 93 is connected to the upper portion of the hot water storage tank 8 .
- a heat exchanger 83 for exchanging heat between the hot water stored in the hot water storage tank 8 and a heat transfer liquid (secondary liquid) is provided.
- the heat exchanger 83 is connected to the heating radiator 3 by the feed pipe 81 and the return pipe 82 .
- the heat transfer liquid heated in the heat exchanger 83 is fed to the heating radiator 3 through the feed pipe 81 , and the heat transfer liquid is returned to the heat exchanger 83 through the return pipe 82 after radiating heat in the heating radiator 3
- a heat transfer liquid for example, an antifreeze liquid can be used, but water preferably is used because it is available at low cost and in large quantities.
- the overall controller 5 performs control in the same manner as in the second embodiment, the description thereof is not repeated here. It should be noted, however, that during the heating operation, the heat transfer liquid that has exchanged heat with the hot water stored in the hot water storage tank 8 radiates heat, that is, the heat of the hot water is transferred to the heating radiator 3 by the heat transfer liquid, and thereby air-heating is performed.
- the temperature in the lower portion of the hot water storage tank 8 can be kept low because of the water supplied from the water inlet pipe 91 . Therefore, the low-temperature water can be supplied to the radiator 22 , and thus the efficiency of the heat pump 2 can be enhanced.
- a heat pump 2 S as shown in FIG. 7 can be employed.
- this heat pump 2 A an accumulator 27 is provided between the evaporator 24 and the compressor 21 in the heat pump circuit 20 .
- an incoming water temperature sensor 72 for detecting the temperature of water (incoming water temperature) to be supplied to the radiator 22 is provided.
- a gas-liquid two phase refrigerant is fed from the evaporator 24 to the accumulator 27 .
- This refrigerant is a zeotropic refrigerant mixture of tetrafluoropropene having a relatively high boiling point and difluoromethane having a relatively low boiling point. Therefore, a tetrafluoropropene-rich liquid pool is formed in the bottom of the accumulator 27 .
- a receiver instead of the accumulator 27 , may be provided between the radiator 22 and the expansion valve 23 .
- the high pressure of the refrigeration cycle can be reduced using the same control as described above.
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a liquid circulation heating system for performing air-heating using a liquid.
- 2. Description of Related Art
- Conventionally, there has been known a liquid circulation heating system for producing hot water by a boiler or an electric heater and performing air-heating using the hot water produced. In recent years, the use of a heat pump capable of producing hot water with high efficiency has been considered as an alternative heat source to a boiler and an electric heater. For example, JP 2008-39306 A proposes a liquid circulation heating system for producing hot water by a heat pump and storing the produced hot water in a hot water storage tank. In this liquid circulation heating system, the hot water stored in the hot water storage tank is fed to, for example, a heating radiator placed indoors to radiate its heat, and then returned to the hot water storage tank.
- The heat pump has a heat pump circuit for circulating a refrigerant. The heat pump circuit includes, for example, a compressor, a radiator, an expansion valve, and an evaporator, which are connected by pipes. Heat is exchanged between a refrigerant and water in the radiator so as to heat the water, and thereby hot water is produced.
- From the viewpoint of preventing global warming, it is desired to use a refrigerant having a low global warming potential (hereinafter referred to as a “GWP”) as a refrigerant to be filled in the heat pump circuit. Recently, low GWP refrigerants such as 2,3,3,3-tetrafluoropropene (HFO-1234yf) have been developed. For example, JP 2007-315663 A discloses a refrigeration cycle apparatus in which a refrigerant containing HFO-1234yf and trifluoroiodomethane (CF3I) is used.
- HFO-1234yf is, however, not suitable for use in heat pumps because of its low heating capability as a heating refrigerant, although it has a low GWP. On the other hand, CF3I does not act as a refrigerant. Therefore, in JP 2007-315663 A, CF3I presumably is added to HFO-1234yf in order to stabilize HFO-1234yf.
- In view of the above circumstances, it is an object of the present invention to provide a liquid circulation heating system having less impact on global warming.
- The present invention provides a liquid circulation heating system for performing air-heating by heating a liquid to produce a heated liquid and releasing heat of the heated liquid from a heating radiator. This system includes a heat pump circuit for circulating a refrigerant to heat the liquid, and the refrigerant contains tetrafluoropropene and difluoromethane as main components.
- The present invention makes it possible to obtain a liquid circulation heating system having less impact on global warming.
-
FIG. 1 is a schematic configuration diagram of a liquid circulation heating system according to a first embodiment of the present invention. -
FIG. 2 is a Mollier diagram of a heat pump. -
FIG. 3 is a graph showing a relationship between the content of difluoromethane in a mixed refrigerant of HFO-1234yf and difluoromethane and the ratio of the heating capacity of a heat pump when using the mixed refrigerant with respect to that when using a HFO-1234yf refrigerant, as well as a relationship between the content of difluoromethane and the GWP of the mixed refrigerant. -
FIG. 4 is a graph showing a relationship between the content of difluoromethane in the mixed refrigerant of HFO-1234yf and difluoromethane and the high pressure at which water of 65° C. is heated to 70° C., as well as a relationship between the content of difluoromethane and the GWP of the mixed refrigerant. -
FIG. 5 is a schematic configuration diagram of a liquid circulation heating system according to a second embodiment of the present invention. -
FIG. 6 is a schematic configuration diagram of a liquid circulation heating system according to a third embodiment of the present invention. -
FIG. 7 is a schematic configuration diagram of a heat pump of a modification. -
FIG. 8 is a schematic configuration diagram of a heat pump of another modification. - Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted, however, that the embodiments described below are merely examples of the present invention, and should not be construed to limit the scope of the present invention.
-
FIG. 1 shows a liquidcirculation heating system 1A according to a first embodiment of the present invention. This liquidcirculation heating system 1A heats a liquid to produce a heated liquid, releases heat of the heated liquid from aheating radiator 3, and thereby performs air-heating, for example, in a room. Specifically, the liquidcirculation heating system 1A includes theheating radiator 3, aheat pump 2 for producing the heated liquid, and anoverall controller 5 for controlling the entire system. - In the present embodiment, the
heating radiator 3 is connected directly to theheat pump 2 by asupply pipe 31 and arecovery pipe 32 to be described later, so that the liquid flows without stopping. As the liquid, for example, an antifreeze liquid containing propylene glycol or the like dissolved in water can be used, but water is preferably used because it is available at low cost and in large quantities. The following description will be made on the assumption that the liquid is water and the heated liquid is hot water. - The
heat pump 2 has aheat pump circuit 20 for circulating a refrigerant. Thisheat pump circuit 20 includes acompressor 21 for compressing the refrigerant, a radiator (refrigerant radiator) 22 for radiating heat from the compressed refrigerant, anexpansion valve 23 for expanding the refrigerant that has radiated heat, and anevaporator 24 for evaporating the expanded refrigerant. Thesecomponents 21 to 24 are connected in series by pipes. Theheat pump 2 includes aheat pump controller 26 for controlling thecompressor 21 and theexpansion valve 23 according to an instruction from theoverall controller 5. An expander for recovering power from the expanding refrigerant also can be used instead of theexpansion valve 23. - In the
radiator 22, heat is exchanged between the refrigerant and the water flowing through theradiator 22 so as to heat the water, and thereby hot water is produced. In theevaporator 24, heat is exchanged between the refrigerant and air blown by afan 25, and thereby the refrigerant absorbs heat. The refrigerant will be described later in detail. - The
heating radiator 3 is a device for radiating heat from hot water flowing therethrough, and has an inlet for allowing the hot water to flow thereinto, and an outlet for allowing the hot water that has radiated its heat to flow therefrom. As theheating radiator 3, for example, a radiator to be placed in a room of a building may be used. A hot water panel to be laid on a floor also may be used. - The outlet of the
heating radiator 3 is connected to theradiator 22 by thesupply pipe 31 for supplying water to theradiator 22. The inlet of theheating radiator 3 is connected to theradiator 22 by therecovery pipe 32 for recovering hot water produced in theradiator 22. Thesupply pipe 31 is provided with apump 61, and therecovery pipe 32 is provided with a hotwater temperature sensor 71 for detecting the temperature of the hot water produced in theradiator 22. When thepump 61 is rotated, the water is guided from theheating radiator 3 to theradiator 22 by thesupply pipe 31, and the hot water produced in theradiator 22 is guided from theradiator 22 to theheating radiator 3 by therecovery pipe 32. - The
overall controller 5 includes a microcomputer, a digital signal processor (DSP), or the like, and is connected to the above-mentionedheat pump controller 26, the hotwater temperature sensor 71, and thepump 61, respectively. When a user turns on a heating switch (not shown), theoverall controller 5 rotates thepump 61 and sends an operation start signal to theheat pump controller 26. Thereby, water is heated in theradiator 22 to produce hot water, and the produced hot water is fed to theheating radiator 3. Thus, air-heating is performed. Theoverall controller 5 controls the rotational rate of thepump 61 to regulate the flow rate of the water flowing through thesupply pipe 31 so that the temperature of the water detected by the hotwater temperature sensor 71 becomes a predetermined temperature (for example, 70° C.). - In the liquid
circulation heating system 1A having such a configuration, the hot water produced can be used directly for air-heating. Therefore, heat radiation loss is reduced, and as a result, energy conservation can be achieved. - Next, the refrigerant used in the
heat pump 2 will be described in detail. - The refrigerant used in the present embodiment contains tetrafluoropropene and difluoromethane (R32) as main components. The phrase “ . . . contains tetrafluoropropene and difluoromethane as main components” means that the total content of tetrafluoropropene and difluoromethane is at least 80% by mass and their respective contents are at least 10% by mass.
- Examples of the tetrafluoropropene includes 2,3,3,3-tetrafluoropropene (HFO-1234yf) and 1,3,3,3-tetrafluoropropene (HFO-1234ze).
- Difluoromethane has a high heating capability as a heating refrigerant. By adding an appropriate amount of difluoromethane to tetrafluoropropene, the heating performance of the refrigerant for heat pumps can be enhanced. From the viewpoint of enhancing the heating performance further, the content of difluoromethane in the refrigerant preferably is at least 20% by mass. More preferably, the content of difluoromethane is at least 25% by mass, still more particularly at least 30% by mass, particularly preferably at least 35% by mass, and especially preferably at least 40% by mass.
- The heating capacity Q [w] of the
heat pump 2 is calculated by the following formula: -
Q=G R ×Δh - where GR is an amount of the refrigerant circulating in the
heat pump circuit 20, and Δh is an enthalpy difference between Point B and Point C (i.e., the high pressure side of the refrigeration cycle) in the Mollier diagram ofFIG. 2 . The circulation amount of the refrigerant is the product of the volumetric capacity V of thecompressor 21 and the density ρc of the refrigerant at Point A (i.e., the refrigerant to be drawn into the compressor 21) in the Mollier diagram ofFIG. 2 . Accordingly, even when a refrigerant having a low heating capability is used, it is possible to achieve the heating capacity Q comparable to that obtained when using a refrigerant having a high heating capability, if the circulation amount GR of the refrigerant is increased, for example, by increasing the rotational rate of thecompressor 21 or increasing the volumetric capacity of thecompressor 21. - Nevertheless, if the heating capability of a refrigerant to be used is high enough to allow the heat pump to achieve a heating capacity Q comparable to that obtained when using a conventional refrigerant under the same conditions, conventional equipment can be used without modification. For example, in order to achieve a heating capacity Q comparable to that obtained when using R407C, which is one of major refrigerants for heat pumps, under the same conditions, the content of difluoromethane in the refrigerant preferably is 26 to 34% by mass, and more preferably 28 to 32% by mass.
- For example,
FIG. 3 shows a relationship between the content of difluoromethane in a mixed refrigerant of HFO-1234yf and difluoromethane and the ratio of the heating capacity of a heat pump when using the mixed refrigerant with respect to that when using a HFO-1234yf refrigerant, as well as a relationship between the content of difluoromethane and the GWP of the mixed refrigerant. As shown inFIG. 3 , in order to achieve a heating capacity Q comparable to that obtained when using R407C under the same conditions, the content of difluoromethane in the refrigerant preferably is at least 30% by mass. In this case, the GWP of the refrigerant is 200 or more. - On the other hand, the GWP of difluoromethane itself is 675, which is not so high, but when difluoromethane is added to tetrafluoroethane, the GWP of the resulting mixed refrigerant increases in proportion to the content of difluoromethane. Therefore, from the viewpoint of obtaining a mixed refrigerant having a low GWP, the content of difluoromethane preferably is at most 80% by mass. More preferably, the content of difluoromethane is at most 75% by mass, still more preferably at most 70% by mass, particularly preferably at most 65% by mass, and especially preferably at most 60% by mass.
- In the liquid
circulation heating system 1A shown inFIG. 1 , when the flow rate of the hot water fed to theheating radiator 3 is high (for example, when a panel heater in which a large amount of hot water flows is used as the heating radiator 3), the temperature of the water that flows from theheating radiator 3 presumably does not drop so much. In this case, the temperature of the water supplied to theradiator 22 rises. When the temperature of the water (hereinafter referred to as an “incoming water temperature”) supplied to theradiator 22 rises, the high pressure of the refrigeration cycle increases, as shown by a dotted line inFIG. 2 . For example, in the case where only difluoromethane is used as a refrigerant, when the incoming water temperature rises to 65° C. during the process of producing hot water of 70° C., the high pressure of the refrigeration cycle increases to about 5 MPa. - However, in a conventional compressor for R410A, which is one of the refrigerants commonly used in heat pumps, the upper limit of the pressure is set to approximately 4.1 MPa to ensure the normal operation thereof. Therefore, in order to use such a conventional compressor for R410A, the high pressure preferably is 4.1 MPa or less to heat the water of 65° C. to 70° C. In order to achieve this pressure level, the content of difluoromethane preferably is at most 47% by mass, and more preferably at most 45% by mass. This can be confirmed from
FIG. 4 showing the relationship between the content of difluoromethane in a mixed refrigerant of HFO-1234yf and difluoromethane and the high pressure at which water of 65° C. is heated to 70° C., as well as the relationship between the content of difluoromethane and the GWP of the mixed refrigerant. It should be noted that inFIG. 4 , the high pressure is calculated by using R134a, which presumably has a heating capability comparable to that of HFO-1234yf. When the content of difluoromethane in the refrigerant is 47% by mass or less, the GWP of the refrigerant is about 310 or less. - The refrigerant further may contain pentafluoroethane (R125). Both tetrafluoropropene and difluoromethane are flammable materials. Therefore, the addition of pentafluoroethane having an effect of suppressing flammability to these materials renders a resulting mixed refrigerant flame-retardant. However, since the GWP of pentafluoroethane is 3500, which is a considerably high value, the content of pentafluoroethane in the mixed refrigerant preferably is at most 10% by mass. More preferably, the content of pentafluoroethane is at most 7% by mass, and still more preferably at most 5% by mass.
- The heating capability of pentafluoroethane as a heating refrigerant is only slightly inferior to that of difluoromethane. Therefore, when pentafluoroethane is added, the content of difluoromethane may be reduced by the amount of pentafluoroethane to be added.
- The above-mentioned refrigerant is filled in the
heat pump circuit 20, together with a refrigerating machine oil. It is preferable to use, as a refrigerating machine oil, a synthetic oil containing, as a main component, an oxygen-containing compound selected from polyoxyalkylene glycols, polyvinyl ethers, copolymers of polyvinyl ethers and polyoxyalkylene glycols or monoethers thereof, polyol esters, polycarbonates, or a synthetic oil containing, as a main component, a compound selected from alkylbenzenes and α-olefines. When a synthetic oil containing an oxygen-containing compound as a main component is used among these synthetic oils, the compatibility with the above-mentioned refrigerant is relatively high, and the return of oil to the compressor can be ensured. Thus, the reliability of the heat pump is enhanced. Even if a synthetic oil containing, as a main component, a compound selected from alkylbenzenes and α-olefines, which have poor compatibility with the above refrigerant, is used, the return of oil can be ensured by the optimal design of the pipe diameter, or the like. -
FIG. 5 shows a liquidcirculation heating system 1B according to a second embodiment of the present invention. In the present embodiment, the same components as those in the first embodiment are designated by the same reference numerals and no further description is given. - The liquid
circulation heating system 1B of the second embodiment has the same configuration as the liquidcirculation heating system 1A of the first embodiment, except that theheating radiator 3 and theradiator 22 are connected via the hotwater storage tank 8. - Furthermore, as a refrigerant for the
heat pump 2, the same refrigerant as that described in the first embodiment also can be used in the present embodiment, and therefore the description of the refrigerant is not repeated here. The same description also is not repeated in the following embodiment and modifications. - The hot
water storage tank 8 is a vertically cylindrical closed casing and is filled with water. The lower portion of the hotwater storage tank 8 is connected to theradiator 22 by thesupply pipe 31, and the upper portion thereof is connected to theradiator 22 by therecovery pipe 32. - When the
pump 61 is rotated, the water is guided from the lower portion of the hotwater storage tank 8 to theradiator 22 by thesupply pipe 31, and the hot water produced in theradiator 22 is guided from theradiator 22 to the upper portion of the hotwater storage tank 8 by therecovery pipe 32. Thereby, the produced hot water is stored in the hotwater storage tank 8 from the top thereof. On the peripheral surface of the hotwater storage tank 8, hotwater temperature sensors 74 for determining how much hot water remains in thetank 8 are provided separately from each other in the vertical direction. The hotwater temperature sensors 74 are connected to theoverall controller 5. - In the present embodiment, a
heat exchanger 92 for hot water supply is provided at an upper position in the hotwater storage tank 8, and awater inlet pipe 91 and a hotwater outlet pipe 93 are connected to thisheat exchanger 92. That is, in the present embodiment, the produced hot water can be used as a heat source for hot water supply. In addition, aheater 85 for re-heating the hot water also is provided at an upper position in the hotwater storage tank 8. - The inlet of the
heating radiator 3 is connected to the upper portion of the hotwater storage tank 8 by afeed pipe 81, and the outlet of theheating radiator 3 is connected to the lower portion of the hotwater storage tank 8 by areturn pipe 82. In the present embodiment, acirculation pump 66 is provided in thereturn pipe 82, but thecirculation pump 66 may be provided in thefeed pipe 81. Thecirculation pump 66 is connected to theoverall controller 5. When thecirculation pump 66 is rotated, the hot water stored in the hotwater storage tank 8 is fed to theheating radiator 3 through thefeed pipe 81, and the hot water is returned to the hotwater storage tank 8 through thereturn pipe 82 after radiating heat in theheating radiator 3. - Next, the control performed by the
overall controller 5 is described specifically. -
- When the
overall controller 5 determines that the amount of hot water remaining in the tank is less than the required amount based on the temperature detected by the hotwater temperature sensors 74, for example, during nighttime hours (for example, from 23:00 to 7:00), it rotates thepump 61, and sends an operation start signal to theheat pump controller 26. Thereby, water is heated in theradiator 22 to produce hot water, and the produced hot water is stored in the hotwater storage tank 8. Theoverall controller 5 also controls the rotational rate of thepump 61 to regulate the flow rate of the water flowing through thesupply pipe 31 so that the temperature of the water detected by the hotwater temperature sensor 71 becomes a predetermined temperature (for example, 70° C.). -
- When a user turns on a heating switch (not shown), the
overall controller 5 rotates thecirculation pump 66. Thereby, the hot water stored in the hotwater storage tank 8 is fed to theheating radiator 3, where heat is radiated from the hot water. Thus, air-heating is performed. - In the liquid
circulation heating system 1B of the second embodiment described above, high-temperature hot water stored in the hotwater storage tank 8 can be fed to theheating radiator 3 even during the early stage of heating operation. Therefore, air-heating can be started immediately after the heating switch is turned on. -
FIG. 6 shows a liquidcirculation heating system 1C according to a third embodiment of the present invention. In the present embodiment, the same components as those in the first and second embodiments are designated by the same reference numerals and no further description is given. - In the liquid
circulation heating system 1C of the third embodiment, hot water stored in the hotwater storage tank 8 can be used directly for hot water supply. Specifically, thewater inlet pipe 91 is connected to the lower portion of the hotwater storage tank 8, and the hotwater outlet pipe 93 is connected to the upper portion of the hotwater storage tank 8. At an upper position in the hotwater storage tank 8, aheat exchanger 83 for exchanging heat between the hot water stored in the hotwater storage tank 8 and a heat transfer liquid (secondary liquid) is provided. Theheat exchanger 83 is connected to theheating radiator 3 by thefeed pipe 81 and thereturn pipe 82. When thecirculation pump 66 is rotated, the heat transfer liquid heated in theheat exchanger 83 is fed to theheating radiator 3 through thefeed pipe 81, and the heat transfer liquid is returned to theheat exchanger 83 through thereturn pipe 82 after radiating heat in theheating radiator 3 As a heat transfer liquid, for example, an antifreeze liquid can be used, but water preferably is used because it is available at low cost and in large quantities. - Since the
overall controller 5 performs control in the same manner as in the second embodiment, the description thereof is not repeated here. It should be noted, however, that during the heating operation, the heat transfer liquid that has exchanged heat with the hot water stored in the hotwater storage tank 8 radiates heat, that is, the heat of the hot water is transferred to theheating radiator 3 by the heat transfer liquid, and thereby air-heating is performed. - In the liquid
circulation heating system 1C having such a configuration, the temperature in the lower portion of the hotwater storage tank 8 can be kept low because of the water supplied from thewater inlet pipe 91. Therefore, the low-temperature water can be supplied to theradiator 22, and thus the efficiency of theheat pump 2 can be enhanced. - In each of the above embodiments, a heat pump 2S as shown in
FIG. 7 can be employed. In thisheat pump 2A, anaccumulator 27 is provided between the evaporator 24 and thecompressor 21 in theheat pump circuit 20. In thesupply pipe 31, an incomingwater temperature sensor 72 for detecting the temperature of water (incoming water temperature) to be supplied to theradiator 22 is provided. - A gas-liquid two phase refrigerant is fed from the
evaporator 24 to theaccumulator 27. This refrigerant is a zeotropic refrigerant mixture of tetrafluoropropene having a relatively high boiling point and difluoromethane having a relatively low boiling point. Therefore, a tetrafluoropropene-rich liquid pool is formed in the bottom of theaccumulator 27. - When the temperature detected by the incoming
water temperature sensor 72 is relatively high, theheat pump controller 26 reduces the opening of theexpansion valve 23. Thereby, the refrigerant absorbs heat efficiently in theevaporator 24, and the amount of liquid-phase refrigerant fed to theaccumulator 27 decreases, and the liquid pool in theaccumulator 27 decreases accordingly. As a result, the content of tetrafluoropropene in the refrigerant circulating through theheat pump circuit 20 increases and the high pressure of the refrigeration cycle drops. - A receiver, instead of the
accumulator 27, may be provided between theradiator 22 and theexpansion valve 23. In this case, when the incoming water temperature is high, the high pressure of the refrigeration cycle can be reduced using the same control as described above. - In each of the above embodiments and modifications, the
radiator 22 is placed in theheat pump radiator 22 may be placed as a separate member from themain body 29, as shown inFIG. 8 . With such a configuration, it is possible to place theradiator 22 indoors, for example, to prevent water from freezing in or around theradiator 22. - The invention may be embodied in other forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed in this specification are to be considered in all respects as illustrative and not limiting. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.
Claims (10)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009019234 | 2009-01-30 | ||
JP2009-019234 | 2009-01-30 | ||
JP2009-221135 | 2009-09-25 | ||
JP2009221135A JP5502410B2 (en) | 2009-01-30 | 2009-09-25 | Liquid circulation heating system |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100193155A1 true US20100193155A1 (en) | 2010-08-05 |
Family
ID=42133766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/693,688 Abandoned US20100193155A1 (en) | 2009-01-30 | 2010-01-26 | Liquid circulation heating system |
Country Status (5)
Country | Link |
---|---|
US (1) | US20100193155A1 (en) |
EP (1) | EP2213710B1 (en) |
JP (1) | JP5502410B2 (en) |
CN (1) | CN101793420B (en) |
AU (1) | AU2010200058A1 (en) |
Cited By (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090242098A1 (en) * | 2008-03-12 | 2009-10-01 | Curt G. Joa, Inc. | Registered stretch laminate and methods for forming a registered stretch laminate |
US20100193156A1 (en) * | 2009-01-30 | 2010-08-05 | Panasonic Corporation | Liquid circulation heating system and method of controlling the same |
US20110088233A1 (en) * | 2006-05-18 | 2011-04-21 | Curt G. Joa, Inc. | Methods and apparatus for application of nested zero waste ear to traveling web |
US8293056B2 (en) | 2006-05-18 | 2012-10-23 | Curt G. Joa, Inc. | Trim removal system |
US8398793B2 (en) | 2007-07-20 | 2013-03-19 | Curt G. Joa, Inc. | Apparatus and method for minimizing waste and improving quality and production in web processing operations |
US8417374B2 (en) | 2004-04-19 | 2013-04-09 | Curt G. Joa, Inc. | Method and apparatus for changing speed or direction of an article |
US8460495B2 (en) | 2009-12-30 | 2013-06-11 | Curt G. Joa, Inc. | Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article |
USD684613S1 (en) | 2011-04-14 | 2013-06-18 | Curt G. Joa, Inc. | Sliding guard structure |
US8557077B2 (en) | 2004-05-21 | 2013-10-15 | Curt G. Joa, Inc. | Method of producing a pants-type diaper |
US20130312446A1 (en) * | 2010-01-27 | 2013-11-28 | Daikin Industries, Ltd. | Refrigerant composition comprising difluoromethane (hfc32) and 2,3,3,3-tetrafluoropropene (hfo1234yf) |
US8656817B2 (en) | 2011-03-09 | 2014-02-25 | Curt G. Joa | Multi-profile die cutting assembly |
US8663411B2 (en) | 2010-06-07 | 2014-03-04 | Curt G. Joa, Inc. | Apparatus and method for forming a pant-type diaper with refastenable side seams |
US8673098B2 (en) | 2009-10-28 | 2014-03-18 | Curt G. Joa, Inc. | Method and apparatus for stretching segmented stretchable film and application of the segmented film to a moving web |
USD703247S1 (en) | 2013-08-23 | 2014-04-22 | Curt G. Joa, Inc. | Ventilated vacuum commutation structure |
USD703248S1 (en) | 2013-08-23 | 2014-04-22 | Curt G. Joa, Inc. | Ventilated vacuum commutation structure |
USD703712S1 (en) | 2013-08-23 | 2014-04-29 | Curt G. Joa, Inc. | Ventilated vacuum commutation structure |
USD703711S1 (en) | 2013-08-23 | 2014-04-29 | Curt G. Joa, Inc. | Ventilated vacuum communication structure |
USD704237S1 (en) | 2013-08-23 | 2014-05-06 | Curt G. Joa, Inc. | Ventilated vacuum commutation structure |
US8794115B2 (en) | 2007-02-21 | 2014-08-05 | Curt G. Joa, Inc. | Single transfer insert placement method and apparatus |
US8820380B2 (en) | 2011-07-21 | 2014-09-02 | Curt G. Joa, Inc. | Differential speed shafted machines and uses therefor, including discontinuous and continuous side by side bonding |
US8940180B2 (en) | 2012-11-21 | 2015-01-27 | Honeywell International Inc. | Low GWP heat transfer compositions |
US9089453B2 (en) | 2009-12-30 | 2015-07-28 | Curt G. Joa, Inc. | Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article |
WO2016014102A1 (en) * | 2014-07-24 | 2016-01-28 | Energy Recovery Technology, Inc. | Energy recovery in air conditioning and other energy producing systems |
US9283683B2 (en) | 2013-07-24 | 2016-03-15 | Curt G. Joa, Inc. | Ventilated vacuum commutation structures |
US9289329B1 (en) | 2013-12-05 | 2016-03-22 | Curt G. Joa, Inc. | Method for producing pant type diapers |
US9387131B2 (en) | 2007-07-20 | 2016-07-12 | Curt G. Joa, Inc. | Apparatus and method for minimizing waste and improving quality and production in web processing operations by automated threading and re-threading of web materials |
US9433538B2 (en) | 2006-05-18 | 2016-09-06 | Curt G. Joa, Inc. | Methods and apparatus for application of nested zero waste ear to traveling web and formation of articles using a dual cut slip unit |
US9550306B2 (en) | 2007-02-21 | 2017-01-24 | Curt G. Joa, Inc. | Single transfer insert placement and apparatus with cross-direction insert placement control |
US9566193B2 (en) | 2011-02-25 | 2017-02-14 | Curt G. Joa, Inc. | Methods and apparatus for forming disposable products at high speeds with small machine footprint |
US9603752B2 (en) | 2010-08-05 | 2017-03-28 | Curt G. Joa, Inc. | Apparatus and method for minimizing waste and improving quality and production in web processing operations by automatic cuff defect correction |
US9783721B2 (en) | 2012-08-20 | 2017-10-10 | Honeywell International Inc. | Low GWP heat transfer compositions |
CN107257836A (en) * | 2014-11-11 | 2017-10-17 | 特灵国际有限公司 | Refrigerant composition earl august eugene lund ian robert and application method |
US9797610B2 (en) | 2011-11-07 | 2017-10-24 | Mitsubishi Electric Corporation | Air-conditioning apparatus with regulation of injection flow rate |
US9809414B2 (en) | 2012-04-24 | 2017-11-07 | Curt G. Joa, Inc. | Elastic break brake apparatus and method for minimizing broken elastic rethreading |
US9868888B2 (en) | 2014-11-26 | 2018-01-16 | Trane International Inc. | Refrigerant compositions |
WO2018022943A1 (en) * | 2016-07-29 | 2018-02-01 | Honeywell International Inc. | Heat transfer compositions, methods and systems |
WO2018022949A3 (en) * | 2016-07-29 | 2018-03-08 | Honeywell International Inc. | Heat transfer compositions, methods and systems |
US9944487B2 (en) | 2007-02-21 | 2018-04-17 | Curt G. Joa, Inc. | Single transfer insert placement method and apparatus |
US9982180B2 (en) | 2013-02-13 | 2018-05-29 | Honeywell International Inc. | Heat transfer compositions and methods |
US10167156B2 (en) | 2015-07-24 | 2019-01-01 | Curt G. Joa, Inc. | Vacuum commutation apparatus and methods |
US10301521B2 (en) | 2016-07-29 | 2019-05-28 | Honeywell International Inc. | Heat transfer methods, systems and compositions |
US10456302B2 (en) | 2006-05-18 | 2019-10-29 | Curt G. Joa, Inc. | Methods and apparatus for application of nested zero waste ear to traveling web |
US10751220B2 (en) | 2012-02-20 | 2020-08-25 | Curt G. Joa, Inc. | Method of forming bonds between discrete components of disposable articles |
US11585575B2 (en) | 2020-07-08 | 2023-02-21 | Rheem Manufacturing Company | Dual-circuit heating, ventilation, air conditioning, and refrigeration systems and associated methods |
US11905454B2 (en) | 2016-07-29 | 2024-02-20 | Honeywell International Inc. | Heat transfer methods, systems and compositions |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2615384B1 (en) * | 2010-09-10 | 2019-06-12 | Panasonic Intellectual Property Management Co., Ltd. | Heat medium circulation type heat pump heater |
JP2013120029A (en) * | 2011-12-08 | 2013-06-17 | Panasonic Corp | Air conditioner |
JPWO2013111180A1 (en) * | 2012-01-24 | 2015-05-11 | 三菱電機株式会社 | Refrigerant charging method for air conditioner, air conditioner |
WO2013111180A1 (en) * | 2012-01-24 | 2013-08-01 | 三菱電機株式会社 | Coolant replenishment method for air-conditioning unit, and air-conditioning unit |
JP6120797B2 (en) * | 2014-04-04 | 2017-04-26 | 三菱電機株式会社 | Air conditioner |
CN104610918A (en) * | 2015-03-04 | 2015-05-13 | 天津大学 | Environment-friendly refrigerant suitable for refrigeration and cold storage system |
Citations (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3813036A (en) * | 1973-05-08 | 1974-05-28 | G Lutz | Heating system |
US4012920A (en) * | 1976-02-18 | 1977-03-22 | Westinghouse Electric Corporation | Heating and cooling system with heat pump and storage |
US4190199A (en) * | 1978-01-06 | 1980-02-26 | Lennox Industries Inc. | Combination heating system including a conventional furnace, heat pump and solar energy subsystem |
US4256475A (en) * | 1977-07-22 | 1981-03-17 | Carrier Corporation | Heat transfer and storage system |
US4412581A (en) * | 1981-03-14 | 1983-11-01 | Danfoss A/S | Heating installation comprising a boiler and a heat pump |
US4514990A (en) * | 1982-11-09 | 1985-05-07 | Alfred Sulkowski | Heat exchange system with space heating, space cooling and hot water generating cycles |
US4522253A (en) * | 1983-08-10 | 1985-06-11 | The Bennett Levin Associates, Inc. | Water-source heat pump system |
US4722195A (en) * | 1985-03-25 | 1988-02-02 | Matsushita Electric Industrial Co., Ltd. | Heat pump with a reservoir storing higher pressure refrigerant of non-azeotropic mixture |
US4724679A (en) * | 1986-07-02 | 1988-02-16 | Reinhard Radermacher | Advanced vapor compression heat pump cycle utilizing non-azeotropic working fluid mixtures |
US4798240A (en) * | 1985-03-18 | 1989-01-17 | Gas Research Institute | Integrated space heating, air conditioning and potable water heating appliance |
US4840042A (en) * | 1987-07-31 | 1989-06-20 | Matsushita Electric Industrial Co., Ltd. | Heat pump system |
US5366153A (en) * | 1993-01-06 | 1994-11-22 | Consolidated Natural Gas Service Company, Inc. | Heat pump system with refrigerant isolation and heat storage |
US5551255A (en) * | 1994-09-27 | 1996-09-03 | The United States Of America As Represented By The Secretary Of Commerce | Accumulator distillation insert for zeotropic refrigerant mixtures |
US5709090A (en) * | 1994-11-25 | 1998-01-20 | Hitachi, Ltd. | Refrigerating system and operating method thereof |
US5848537A (en) * | 1997-08-22 | 1998-12-15 | Carrier Corporation | Variable refrigerant, intrastage compression heat pump |
US6327866B1 (en) * | 1998-12-30 | 2001-12-11 | Praxair Technology, Inc. | Food freezing method using a multicomponent refrigerant |
US20020000094A1 (en) * | 2000-06-28 | 2002-01-03 | Jyouji Kuroki | Heat - pump water heater |
US6668572B1 (en) * | 2002-08-06 | 2003-12-30 | Samsung Electronics Co., Ltd. | Air conditioner having hot/cold water producing device |
US20040119047A1 (en) * | 2002-10-25 | 2004-06-24 | Honeywell International, Inc. | Compositions containing fluorine substituted olefins |
US20050218240A1 (en) * | 2003-01-13 | 2005-10-06 | Sienel Tobias H | Storage tank for hot water systems |
US7024879B2 (en) * | 2003-01-16 | 2006-04-11 | Matsushita Electric Industrial Co., Ltd. | Refrigerator |
US20060243944A1 (en) * | 2005-03-04 | 2006-11-02 | Minor Barbara H | Compositions comprising a fluoroolefin |
US20060243945A1 (en) * | 2005-03-04 | 2006-11-02 | Minor Barbara H | Compositions comprising a fluoroolefin |
US7279451B2 (en) * | 2002-10-25 | 2007-10-09 | Honeywell International Inc. | Compositions containing fluorine substituted olefins |
US7316120B2 (en) * | 2004-10-18 | 2008-01-08 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration/air conditioning equipment |
US20080099190A1 (en) * | 2002-10-25 | 2008-05-01 | Honeywell International, Inc. | Heat transfer methods using heat transfer compositions containing trans-1,3,3,3-tetrafluoropropene |
US20080190130A1 (en) * | 2005-06-03 | 2008-08-14 | Springer Carrier Ltda | Heat Pump System with Auxiliary Water Heating |
US20080314073A1 (en) * | 2007-06-21 | 2008-12-25 | E. L. Du Pont De Nemours And Company | Method for leak detection in heat transfer systems |
US20100050675A1 (en) * | 2007-03-27 | 2010-03-04 | Mitsubishi Electric Corporation | Heat pump system |
US20100108936A1 (en) * | 2006-11-02 | 2010-05-06 | Idemitsu Kosan Co., Ltd | Lubricating oil composition for refrigerators |
US20100193156A1 (en) * | 2009-01-30 | 2010-08-05 | Panasonic Corporation | Liquid circulation heating system and method of controlling the same |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3737381B2 (en) * | 2000-06-05 | 2006-01-18 | 株式会社デンソー | Water heater |
JP2003322387A (en) * | 2002-04-26 | 2003-11-14 | Sanyo Electric Co Ltd | Air conditioning system |
JP4363024B2 (en) * | 2002-10-11 | 2009-11-11 | ダイキン工業株式会社 | Refrigerant circuit |
JP2004156806A (en) * | 2002-11-05 | 2004-06-03 | Sanyo Electric Co Ltd | Warm/cold thermal system |
US7655610B2 (en) * | 2004-04-29 | 2010-02-02 | Honeywell International Inc. | Blowing agent compositions comprising fluorinated olefins and carbon dioxide |
EP1815188B1 (en) * | 2004-11-19 | 2013-01-09 | Mayekawa Mfg. Co., Ltd. | Hot water supply and air conditioning system using co2 heat pump |
TWI482748B (en) * | 2005-06-24 | 2015-05-01 | Honeywell Int Inc | Compositions containing fluorine substituted olefins |
JP4581897B2 (en) * | 2005-08-04 | 2010-11-17 | 株式会社富士通ゼネラル | Heat pump type hot air heater |
JP4026654B2 (en) * | 2005-08-05 | 2007-12-26 | 松下電器産業株式会社 | Water heater |
US7708903B2 (en) * | 2005-11-01 | 2010-05-04 | E.I. Du Pont De Nemours And Company | Compositions comprising fluoroolefins and uses thereof |
CN2886390Y (en) * | 2006-02-05 | 2007-04-04 | 高秀明 | Automatic liquid supplementing heat pump heating device |
CN2937887Y (en) * | 2006-04-24 | 2007-08-22 | 李育锋 | Heat-pump heating system of using circulation water |
JP2007315663A (en) | 2006-05-25 | 2007-12-06 | Sanden Corp | Refrigeration system |
JP2007333252A (en) * | 2006-06-13 | 2007-12-27 | Sharp Corp | Heat pump type water heater |
JP4743039B2 (en) | 2006-08-07 | 2011-08-10 | ダイキン工業株式会社 | Hot water circulation heating system for heating by circulating hot water in buildings |
JP5407157B2 (en) * | 2008-03-18 | 2014-02-05 | ダイキン工業株式会社 | Refrigeration equipment |
-
2009
- 2009-09-25 JP JP2009221135A patent/JP5502410B2/en active Active
-
2010
- 2010-01-07 AU AU2010200058A patent/AU2010200058A1/en not_active Abandoned
- 2010-01-11 EP EP10150401.7A patent/EP2213710B1/en active Active
- 2010-01-26 US US12/693,688 patent/US20100193155A1/en not_active Abandoned
- 2010-01-29 CN CN201010106958.0A patent/CN101793420B/en not_active Expired - Fee Related
Patent Citations (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3813036A (en) * | 1973-05-08 | 1974-05-28 | G Lutz | Heating system |
US4012920A (en) * | 1976-02-18 | 1977-03-22 | Westinghouse Electric Corporation | Heating and cooling system with heat pump and storage |
US4256475A (en) * | 1977-07-22 | 1981-03-17 | Carrier Corporation | Heat transfer and storage system |
US4190199A (en) * | 1978-01-06 | 1980-02-26 | Lennox Industries Inc. | Combination heating system including a conventional furnace, heat pump and solar energy subsystem |
US4412581A (en) * | 1981-03-14 | 1983-11-01 | Danfoss A/S | Heating installation comprising a boiler and a heat pump |
US4514990A (en) * | 1982-11-09 | 1985-05-07 | Alfred Sulkowski | Heat exchange system with space heating, space cooling and hot water generating cycles |
US4522253A (en) * | 1983-08-10 | 1985-06-11 | The Bennett Levin Associates, Inc. | Water-source heat pump system |
US4798240A (en) * | 1985-03-18 | 1989-01-17 | Gas Research Institute | Integrated space heating, air conditioning and potable water heating appliance |
US4722195A (en) * | 1985-03-25 | 1988-02-02 | Matsushita Electric Industrial Co., Ltd. | Heat pump with a reservoir storing higher pressure refrigerant of non-azeotropic mixture |
US4724679A (en) * | 1986-07-02 | 1988-02-16 | Reinhard Radermacher | Advanced vapor compression heat pump cycle utilizing non-azeotropic working fluid mixtures |
US4840042A (en) * | 1987-07-31 | 1989-06-20 | Matsushita Electric Industrial Co., Ltd. | Heat pump system |
US5366153A (en) * | 1993-01-06 | 1994-11-22 | Consolidated Natural Gas Service Company, Inc. | Heat pump system with refrigerant isolation and heat storage |
US5551255A (en) * | 1994-09-27 | 1996-09-03 | The United States Of America As Represented By The Secretary Of Commerce | Accumulator distillation insert for zeotropic refrigerant mixtures |
US5709090A (en) * | 1994-11-25 | 1998-01-20 | Hitachi, Ltd. | Refrigerating system and operating method thereof |
US5848537A (en) * | 1997-08-22 | 1998-12-15 | Carrier Corporation | Variable refrigerant, intrastage compression heat pump |
US6070420A (en) * | 1997-08-22 | 2000-06-06 | Carrier Corporation | Variable refrigerant, intrastage compression heat pump |
US6327866B1 (en) * | 1998-12-30 | 2001-12-11 | Praxair Technology, Inc. | Food freezing method using a multicomponent refrigerant |
US6467288B2 (en) * | 2000-06-28 | 2002-10-22 | Denso Corporation | Heat-pump water heater |
US20020000094A1 (en) * | 2000-06-28 | 2002-01-03 | Jyouji Kuroki | Heat - pump water heater |
US6668572B1 (en) * | 2002-08-06 | 2003-12-30 | Samsung Electronics Co., Ltd. | Air conditioner having hot/cold water producing device |
US20040119047A1 (en) * | 2002-10-25 | 2004-06-24 | Honeywell International, Inc. | Compositions containing fluorine substituted olefins |
US20040127383A1 (en) * | 2002-10-25 | 2004-07-01 | Pham Hang T. | Pentafluoropropene-based compositions |
US20080099190A1 (en) * | 2002-10-25 | 2008-05-01 | Honeywell International, Inc. | Heat transfer methods using heat transfer compositions containing trans-1,3,3,3-tetrafluoropropene |
US7279451B2 (en) * | 2002-10-25 | 2007-10-09 | Honeywell International Inc. | Compositions containing fluorine substituted olefins |
US20050218240A1 (en) * | 2003-01-13 | 2005-10-06 | Sienel Tobias H | Storage tank for hot water systems |
US7024879B2 (en) * | 2003-01-16 | 2006-04-11 | Matsushita Electric Industrial Co., Ltd. | Refrigerator |
US7316120B2 (en) * | 2004-10-18 | 2008-01-08 | Mitsubishi Denki Kabushiki Kaisha | Refrigeration/air conditioning equipment |
US20060243945A1 (en) * | 2005-03-04 | 2006-11-02 | Minor Barbara H | Compositions comprising a fluoroolefin |
US20060243944A1 (en) * | 2005-03-04 | 2006-11-02 | Minor Barbara H | Compositions comprising a fluoroolefin |
US20080190130A1 (en) * | 2005-06-03 | 2008-08-14 | Springer Carrier Ltda | Heat Pump System with Auxiliary Water Heating |
US20100108936A1 (en) * | 2006-11-02 | 2010-05-06 | Idemitsu Kosan Co., Ltd | Lubricating oil composition for refrigerators |
US20100050675A1 (en) * | 2007-03-27 | 2010-03-04 | Mitsubishi Electric Corporation | Heat pump system |
US20080314073A1 (en) * | 2007-06-21 | 2008-12-25 | E. L. Du Pont De Nemours And Company | Method for leak detection in heat transfer systems |
US20100193156A1 (en) * | 2009-01-30 | 2010-08-05 | Panasonic Corporation | Liquid circulation heating system and method of controlling the same |
Cited By (64)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8417374B2 (en) | 2004-04-19 | 2013-04-09 | Curt G. Joa, Inc. | Method and apparatus for changing speed or direction of an article |
US8557077B2 (en) | 2004-05-21 | 2013-10-15 | Curt G. Joa, Inc. | Method of producing a pants-type diaper |
US9622918B2 (en) | 2006-05-18 | 2017-04-18 | Curt G. Joe, Inc. | Methods and apparatus for application of nested zero waste ear to traveling web |
US10456302B2 (en) | 2006-05-18 | 2019-10-29 | Curt G. Joa, Inc. | Methods and apparatus for application of nested zero waste ear to traveling web |
US20110088233A1 (en) * | 2006-05-18 | 2011-04-21 | Curt G. Joa, Inc. | Methods and apparatus for application of nested zero waste ear to traveling web |
US9433538B2 (en) | 2006-05-18 | 2016-09-06 | Curt G. Joa, Inc. | Methods and apparatus for application of nested zero waste ear to traveling web and formation of articles using a dual cut slip unit |
US8293056B2 (en) | 2006-05-18 | 2012-10-23 | Curt G. Joa, Inc. | Trim removal system |
US9944487B2 (en) | 2007-02-21 | 2018-04-17 | Curt G. Joa, Inc. | Single transfer insert placement method and apparatus |
US9950439B2 (en) | 2007-02-21 | 2018-04-24 | Curt G. Joa, Inc. | Single transfer insert placement method and apparatus with cross-direction insert placement control |
US9550306B2 (en) | 2007-02-21 | 2017-01-24 | Curt G. Joa, Inc. | Single transfer insert placement and apparatus with cross-direction insert placement control |
US8794115B2 (en) | 2007-02-21 | 2014-08-05 | Curt G. Joa, Inc. | Single transfer insert placement method and apparatus |
US10266362B2 (en) | 2007-02-21 | 2019-04-23 | Curt G. Joa, Inc. | Single transfer insert placement method and apparatus |
US9387131B2 (en) | 2007-07-20 | 2016-07-12 | Curt G. Joa, Inc. | Apparatus and method for minimizing waste and improving quality and production in web processing operations by automated threading and re-threading of web materials |
US8398793B2 (en) | 2007-07-20 | 2013-03-19 | Curt G. Joa, Inc. | Apparatus and method for minimizing waste and improving quality and production in web processing operations |
US8182624B2 (en) | 2008-03-12 | 2012-05-22 | Curt G. Joa, Inc. | Registered stretch laminate and methods for forming a registered stretch laminate |
US20090242098A1 (en) * | 2008-03-12 | 2009-10-01 | Curt G. Joa, Inc. | Registered stretch laminate and methods for forming a registered stretch laminate |
US20100193156A1 (en) * | 2009-01-30 | 2010-08-05 | Panasonic Corporation | Liquid circulation heating system and method of controlling the same |
US10702428B2 (en) | 2009-04-06 | 2020-07-07 | Curt G. Joa, Inc. | Methods and apparatus for application of nested zero waste ear to traveling web |
US8673098B2 (en) | 2009-10-28 | 2014-03-18 | Curt G. Joa, Inc. | Method and apparatus for stretching segmented stretchable film and application of the segmented film to a moving web |
US9089453B2 (en) | 2009-12-30 | 2015-07-28 | Curt G. Joa, Inc. | Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article |
US8460495B2 (en) | 2009-12-30 | 2013-06-11 | Curt G. Joa, Inc. | Method for producing absorbent article with stretch film side panel and application of intermittent discrete components of an absorbent article |
US9758709B2 (en) * | 2010-01-27 | 2017-09-12 | Daikin Industries, Ltd. | Refrigerant composition comprising difluoromethane (HFC32) and 2,3,3,3-tetrafluoropropene (HFO1234yf) |
US20130312446A1 (en) * | 2010-01-27 | 2013-11-28 | Daikin Industries, Ltd. | Refrigerant composition comprising difluoromethane (hfc32) and 2,3,3,3-tetrafluoropropene (hfo1234yf) |
US10619082B2 (en) | 2010-01-27 | 2020-04-14 | Daikin Industries, Ltd. | Refrigerant composition comprising difluoromethane (HFC32) and 2,3,3,3-tetrafluoropropene (HFO1234yf) |
US8663411B2 (en) | 2010-06-07 | 2014-03-04 | Curt G. Joa, Inc. | Apparatus and method for forming a pant-type diaper with refastenable side seams |
US9603752B2 (en) | 2010-08-05 | 2017-03-28 | Curt G. Joa, Inc. | Apparatus and method for minimizing waste and improving quality and production in web processing operations by automatic cuff defect correction |
USRE48182E1 (en) | 2010-08-05 | 2020-09-01 | Curt G. Joa, Inc. | Apparatus and method for minimizing waste and improving quality and production in web processing operations by automatic cuff defect correction |
US9566193B2 (en) | 2011-02-25 | 2017-02-14 | Curt G. Joa, Inc. | Methods and apparatus for forming disposable products at high speeds with small machine footprint |
US9907706B2 (en) | 2011-02-25 | 2018-03-06 | Curt G. Joa, Inc. | Methods and apparatus for forming disposable products at high speeds with small machine footprint |
US8656817B2 (en) | 2011-03-09 | 2014-02-25 | Curt G. Joa | Multi-profile die cutting assembly |
USD684613S1 (en) | 2011-04-14 | 2013-06-18 | Curt G. Joa, Inc. | Sliding guard structure |
US8820380B2 (en) | 2011-07-21 | 2014-09-02 | Curt G. Joa, Inc. | Differential speed shafted machines and uses therefor, including discontinuous and continuous side by side bonding |
US9797610B2 (en) | 2011-11-07 | 2017-10-24 | Mitsubishi Electric Corporation | Air-conditioning apparatus with regulation of injection flow rate |
US10751220B2 (en) | 2012-02-20 | 2020-08-25 | Curt G. Joa, Inc. | Method of forming bonds between discrete components of disposable articles |
US11034543B2 (en) | 2012-04-24 | 2021-06-15 | Curt G. Joa, Inc. | Apparatus and method for applying parallel flared elastics to disposable products and disposable products containing parallel flared elastics |
US9809414B2 (en) | 2012-04-24 | 2017-11-07 | Curt G. Joa, Inc. | Elastic break brake apparatus and method for minimizing broken elastic rethreading |
US9908739B2 (en) | 2012-04-24 | 2018-03-06 | Curt G. Joa, Inc. | Apparatus and method for applying parallel flared elastics to disposable products and disposable products containing parallel flared elastics |
US9783721B2 (en) | 2012-08-20 | 2017-10-10 | Honeywell International Inc. | Low GWP heat transfer compositions |
US8940180B2 (en) | 2012-11-21 | 2015-01-27 | Honeywell International Inc. | Low GWP heat transfer compositions |
US9982180B2 (en) | 2013-02-13 | 2018-05-29 | Honeywell International Inc. | Heat transfer compositions and methods |
US9283683B2 (en) | 2013-07-24 | 2016-03-15 | Curt G. Joa, Inc. | Ventilated vacuum commutation structures |
USD703712S1 (en) | 2013-08-23 | 2014-04-29 | Curt G. Joa, Inc. | Ventilated vacuum commutation structure |
USD703247S1 (en) | 2013-08-23 | 2014-04-22 | Curt G. Joa, Inc. | Ventilated vacuum commutation structure |
USD703248S1 (en) | 2013-08-23 | 2014-04-22 | Curt G. Joa, Inc. | Ventilated vacuum commutation structure |
USD703711S1 (en) | 2013-08-23 | 2014-04-29 | Curt G. Joa, Inc. | Ventilated vacuum communication structure |
USD704237S1 (en) | 2013-08-23 | 2014-05-06 | Curt G. Joa, Inc. | Ventilated vacuum commutation structure |
US9289329B1 (en) | 2013-12-05 | 2016-03-22 | Curt G. Joa, Inc. | Method for producing pant type diapers |
WO2016014102A1 (en) * | 2014-07-24 | 2016-01-28 | Energy Recovery Technology, Inc. | Energy recovery in air conditioning and other energy producing systems |
US10214670B2 (en) | 2014-11-11 | 2019-02-26 | Trane International Inc. | Refrigerant compositions and methods of use |
EP3218443A4 (en) * | 2014-11-11 | 2017-11-08 | Trane International Inc. | Refrigerant compositions and methods of use |
CN107257836A (en) * | 2014-11-11 | 2017-10-17 | 特灵国际有限公司 | Refrigerant composition earl august eugene lund ian robert and application method |
US11198805B2 (en) | 2014-11-11 | 2021-12-14 | Trane International Inc. | Refrigerant compositions and methods of use |
CN113444493A (en) * | 2014-11-11 | 2021-09-28 | 特灵国际有限公司 | Refrigerant compositions and methods of use |
EP3851504A1 (en) * | 2014-11-11 | 2021-07-21 | Trane International Inc. | Refrigerant compositions |
US10316233B2 (en) | 2014-11-26 | 2019-06-11 | Trane International Inc. | Refrigerant compositions |
US9868888B2 (en) | 2014-11-26 | 2018-01-16 | Trane International Inc. | Refrigerant compositions |
US10167156B2 (en) | 2015-07-24 | 2019-01-01 | Curt G. Joa, Inc. | Vacuum commutation apparatus and methods |
US10633207B2 (en) | 2015-07-24 | 2020-04-28 | Curt G. Joa, Inc. | Vacuum commutation apparatus and methods |
US10494216B2 (en) | 2015-07-24 | 2019-12-03 | Curt G. Joa, Inc. | Vacuum communication apparatus and methods |
US10301521B2 (en) | 2016-07-29 | 2019-05-28 | Honeywell International Inc. | Heat transfer methods, systems and compositions |
WO2018022943A1 (en) * | 2016-07-29 | 2018-02-01 | Honeywell International Inc. | Heat transfer compositions, methods and systems |
WO2018022949A3 (en) * | 2016-07-29 | 2018-03-08 | Honeywell International Inc. | Heat transfer compositions, methods and systems |
US11905454B2 (en) | 2016-07-29 | 2024-02-20 | Honeywell International Inc. | Heat transfer methods, systems and compositions |
US11585575B2 (en) | 2020-07-08 | 2023-02-21 | Rheem Manufacturing Company | Dual-circuit heating, ventilation, air conditioning, and refrigeration systems and associated methods |
Also Published As
Publication number | Publication date |
---|---|
CN101793420A (en) | 2010-08-04 |
EP2213710A3 (en) | 2012-11-21 |
EP2213710B1 (en) | 2017-07-19 |
JP5502410B2 (en) | 2014-05-28 |
JP2010197033A (en) | 2010-09-09 |
EP2213710A2 (en) | 2010-08-04 |
CN101793420B (en) | 2014-06-18 |
AU2010200058A1 (en) | 2010-08-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2213710B1 (en) | Liquid circulation heating system | |
EP2213950B1 (en) | Liquid circulation heating system and method of controlling the same | |
EP2246649B2 (en) | Refrigerating apparatus | |
US20170130997A1 (en) | Heat pump system | |
US8984901B2 (en) | Heat pump system | |
US8769974B2 (en) | Heat pump system | |
US8650897B2 (en) | Heat pump system | |
JP5511838B2 (en) | Air conditioner | |
JP2015218909A (en) | Refrigeration cycle device and hot water generation device including the same | |
US10088198B2 (en) | Air-conditioning and hot water supplying composite system | |
JP2008002759A (en) | Binary refrigerating system and cold storage | |
US9810466B2 (en) | Heat pump system | |
JP5837099B2 (en) | Air conditioner | |
WO2015140885A1 (en) | Refrigeration cycle apparatus | |
WO2013111180A1 (en) | Coolant replenishment method for air-conditioning unit, and air-conditioning unit | |
WO2015140878A1 (en) | Accumulator and refrigeration cycle apparatus | |
CN110268208A (en) | Refrigerating plant | |
JP4425957B2 (en) | Heat pump water heater | |
JP2006234272A (en) | Heat pump water heater | |
JP2014013098A (en) | Refrigeration cycle device and hot water generation device provided with the same | |
JP2014001865A (en) | Refrigeration cycle device and hot water generating device including the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PANASONIC CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:NAKATANI, KAZUO;ISAYAMA, YASUHIKO;REEL/FRAME:024138/0563 Effective date: 20091202 |
|
AS | Assignment |
Owner name: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PANASONIC CORPORATION;REEL/FRAME:034194/0143 Effective date: 20141110 Owner name: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LT Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PANASONIC CORPORATION;REEL/FRAME:034194/0143 Effective date: 20141110 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |
|
AS | Assignment |
Owner name: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., JAPAN Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ERRONEOUSLY FILED APPLICATION NUMBERS 13/384239, 13/498734, 14/116681 AND 14/301144 PREVIOUSLY RECORDED ON REEL 034194 FRAME 0143. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:PANASONIC CORPORATION;REEL/FRAME:056788/0362 Effective date: 20141110 |