WO2008032645A1 - dispositif de réfrigération - Google Patents
dispositif de réfrigération Download PDFInfo
- Publication number
- WO2008032645A1 WO2008032645A1 PCT/JP2007/067470 JP2007067470W WO2008032645A1 WO 2008032645 A1 WO2008032645 A1 WO 2008032645A1 JP 2007067470 W JP2007067470 W JP 2007067470W WO 2008032645 A1 WO2008032645 A1 WO 2008032645A1
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- WO
- WIPO (PCT)
- Prior art keywords
- refrigerant
- heat exchanger
- expansion mechanism
- pipe
- internal heat
- Prior art date
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Classifications
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- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/39—Dispositions with two or more expansion means arranged in series, i.e. multi-stage expansion, on a refrigerant line leading to the same evaporator
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- 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
- F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
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- 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
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
- F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/0272—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using bridge circuits of one-way valves
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- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
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- 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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
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- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2509—Economiser valves
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- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2102—Temperatures at the outlet of the gas cooler
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- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
Definitions
- the present invention relates to a refrigeration apparatus, and more particularly to a refrigeration apparatus in which a refrigerant enters a supercritical state during a refrigeration cycle.
- a compressor Conventionally, a compressor, a radiator that radiates the refrigerant discharged from the compressor, a first expansion valve that decompresses the refrigerant that flows out of the radiator, and a part of the refrigerant that flows out of the first expansion valve
- a storage receiver a second expansion valve that depressurizes the refrigerant flowing out of the receiver, an evaporator that evaporates the refrigerant flowing out of the second expansion valve, and an outlet side of the radiator and the first expansion valve
- the refrigerant flowing in the refrigerant pipe connecting the refrigerant inflow side to the refrigerant and the internal heat exchanger for exchanging heat between the refrigerant flowing in the refrigerant pipe connecting the outlet side of the evaporator and the refrigerant suction side of the compressor were sequentially connected.
- a refrigeration apparatus having a refrigerant circuit is publicly known (see, for example, Patent Document 1).
- Patent Document 1 Japanese Patent Laid-Open No. 2002-228282 (FIG. 10)
- An object of the present invention is to provide a sufficient degree of supercooling to the refrigerant after passing through the first expansion mechanism in the refrigerant device as described above, and to keep the degree of superheat of the refrigerant sucked into the compressor properly.
- the goal is to use mosquitoes.
- the refrigeration apparatus includes a compression mechanism, a radiator, a first expansion mechanism, a second expansion mechanism, a evaporator, a first internal heat exchanger, a branch pipe, a third expansion mechanism, and a second Provide an internal heat exchanger.
- the compression mechanism compresses the refrigerant.
- the radiator is connected to the refrigerant discharge side of the compression mechanism.
- the first expansion mechanism is connected to the outlet side of the radiator.
- the second expansion mechanism is the first expansion mechanism Connected to the refrigerant outflow side.
- the evaporator is connected to the refrigerant outflow side of the second expansion mechanism and is connected to the refrigerant suction side of the compression mechanism.
- the first internal heat exchanger connects the refrigerant flowing in the first refrigerant pipe connecting the outlet side of the radiator and the inflow side of the first expansion mechanism, and the outlet side of the evaporator and the refrigerant suction side of the compression mechanism. Exchange heat with the refrigerant flowing in the second refrigerant pipe.
- the branch pipe branches from the third refrigerant pipe that connects the outlet side of the radiator and the refrigerant inflow side of the second expansion mechanism, and joins the second refrigerant pipe.
- the third expansion mechanism is installed in the branch pipe.
- the second internal heat exchanger causes heat exchange between the refrigerant flowing out of the first expansion mechanism and the refrigerant flowing out of the third expansion mechanism.
- the second refrigerant pipe connecting the outlet side of the evaporator and the refrigerant suction side of the compression mechanism is connected to the second refrigerant pipe connecting the outlet side of the radiator and the refrigerant inflow side of the second expansion mechanism.
- the branch pipe that branches off from the three refrigerant pipes joins, and a third expansion mechanism is provided in this branch pipe.
- the degree of superheat of the refrigerant sucked into the compression mechanism can be maintained appropriately.
- heat is exchanged between the refrigerant that also flows out the first expansion mechanism force and the refrigerant that flows out from the third expansion mechanism. For this reason, in this refrigeration apparatus, a sufficient degree of supercooling can be imparted to the refrigerant after passing through the first expansion mechanism.
- a refrigeration apparatus is the refrigeration apparatus according to the first invention, wherein the branch pipe connects the refrigerant outflow side of the first expansion mechanism to the refrigerant inflow side of the second expansion mechanism. Branches from the refrigerant pipe and joins the second refrigerant pipe.
- the second refrigerant pipe connecting the outlet side of the evaporator and the refrigerant suction side of the compression mechanism is connected to the refrigerant outflow side of the first expansion mechanism and the refrigerant inflow side of the second expansion mechanism.
- a refrigeration apparatus is the refrigeration apparatus according to the first invention or the second invention, wherein the branch pipe flows out of the third expansion mechanism force and is heat-exchanged in the second internal heat exchanger. Is the refrigerant flowing through the second refrigerant pipe and merges with the second refrigerant pipe so as to merge with the refrigerant before flowing into the first internal heat exchanger.
- the branch pipe flows out of the third expansion mechanism and the heat exchanged in the second internal heat exchanger is the refrigerant flowing in the second refrigerant pipe and flows into the first internal heat exchanger. Merge into the second refrigerant pipe so that it merges with the refrigerant prior to starting. For this reason, in this refrigeration apparatus, the capacity of the first internal heat exchanger can be adjusted.
- a refrigeration apparatus is the refrigeration apparatus according to the first invention or the second invention, wherein the branch pipe flows out of the third expansion mechanism and is heat-exchanged in the second internal heat exchanger. However, the refrigerant flows through the second refrigerant pipe and merges with the second refrigerant pipe so as to merge with the refrigerant after passing through the first internal heat exchanger.
- the branch pipe flows out of the third expansion mechanism and the heat exchanged in the second internal heat exchanger is the refrigerant flowing through the second refrigerant pipe and passes through the first internal heat exchanger. After that, it merges with the second refrigerant pipe so as to merge with the refrigerant. Therefore, in this refrigeration apparatus, for example, when the degree of superheat of the refrigerant sucked into the compression mechanism becomes extremely large, the refrigerant wetted by the third expansion mechanism is merged with the refrigerant sucked into the compression mechanism. As a result, the degree of superheat of the refrigerant sucked into the compression mechanism can be maintained appropriately.
- a refrigeration apparatus is the refrigeration apparatus according to the first invention or the second invention, wherein the branch pipe joins the second refrigerant pipe connected to the inlet side of the first internal heat exchanger. To do.
- the branch pipe joins the second refrigerant pipe connected to the inlet side of the first internal heat exchanger. For this reason, in this refrigeration system, the force S is used to adjust the capacity of the first internal heat exchanger.
- a refrigeration apparatus is the refrigeration apparatus according to the first or second invention, wherein the branch pipe joins the second refrigerant pipe connected to the outlet side of the first internal heat exchanger. To do.
- the branch pipe joins the second refrigerant pipe connected to the outlet side of the first internal heat exchanger. Therefore, in this refrigeration apparatus, for example, when the superheat degree of the refrigerant sucked into the compression mechanism becomes extremely large, the refrigerant wetted by the third expansion mechanism is merged with the refrigerant sucked into the compression mechanism. As a result, the degree of superheat of the refrigerant sucked into the compression mechanism can be maintained appropriately.
- a refrigeration apparatus is the refrigeration apparatus according to any one of the first to sixth inventions, further comprising a first control unit.
- the first control unit joins the branch pipe and the second refrigerant pipe.
- the third expansion mechanism is controlled so that the degree of superheat of the refrigerant flowing from the point to the refrigerant suction side of the compression mechanism falls within a predetermined range.
- the first control unit has a third expansion mechanism structure so that the degree of superheat of the refrigerant flowing from the junction of the branch pipe and the second refrigerant pipe to the refrigerant suction side of the compressor mechanism is within a predetermined range. To control. For this reason, in this refrigeration apparatus, the degree of superheat of the refrigerant sucked into the compression mechanism can be properly maintained.
- a refrigeration apparatus is the refrigeration apparatus according to any one of the first to seventh inventions, further comprising a liquid receiver and a second control unit.
- the liquid receiver is disposed between the refrigerant outlet side of the first expansion mechanism and the refrigerant inlet flowing through the first refrigerant pipe of the second internal heat exchanger.
- the second control unit performs refrigerant cooling control for cooling the refrigerant flowing through the first refrigerant pipe by the first internal heat exchanger so that the state of the refrigerant flowing out from the first expansion mechanism does not become a state near the critical point.
- the first expansion mechanism When the liquid receiver is thus disposed between the refrigerant outflow side of the first expansion mechanism and the refrigerant inlet flowing through the first refrigerant pipe of the second internal heat exchanger, the first expansion mechanism If the refrigerant expands to a state near the saturation line, depending on the installation environment (for example, when it is overloaded in the summer), the refrigerant may be near the critical point. If the refrigerant is in the vicinity of the critical point in this way, it will be difficult to control the liquid level of the refrigerant in the receiver, as it will cause cavitation and adversely affect the components of the refrigerant circuit. There is a risk that the refrigerant in the refrigerant circuit cannot be maintained at an appropriate amount.
- the second control unit cools the refrigerant flowing through the first refrigerant pipe by the first internal heat exchanger so that the state of the refrigerant flowing out of the first expansion mechanism does not become a state near the critical point.
- the refrigerant cooling control is performed. For this reason, in this refrigeration system, when the refrigerant is expanded to a state near the saturation line by the first expansion mechanism, the force S is used to avoid the refrigerant from being near the critical point.
- a refrigeration apparatus is the refrigeration apparatus according to the eighth aspect of the invention, wherein the refrigerant cooling control is performed so that the state of the refrigerant flowing out of the first expansion mechanism force does not become a state near the critical point. 1
- the expansion mechanism and the second expansion mechanism are controlled.
- the state of the refrigerant that has flowed through the first expansion mechanism force in the refrigerant cooling control The first expansion mechanism and the second expansion mechanism are controlled so that does not enter a state near the critical point. For this reason, in this refrigeration apparatus, when the refrigerant is expanded to the state near the saturation line by the first expansion mechanism, the refrigerant can be prevented from being in the state near the critical point.
- a refrigeration apparatus is the refrigeration apparatus according to the eighth invention or the ninth invention, wherein in the refrigerant cooling control, the pressure of the refrigerant flowing out of the first expansion mechanism is ⁇ critical pressure (MPa)- The refrigerant flowing through the first refrigerant pipe is cooled by the first internal heat exchanger so that the pressure becomes 0.3 MPa ⁇ or lower.
- the first refrigerant pipe is connected by the first internal heat exchanger so that the pressure of the refrigerant flowing out of the first expansion mechanism force in the refrigerant cooling control is equal to or lower than the pressure of ⁇ critical pressure (MPa) —0.3 MPa ⁇ .
- MPa ⁇ critical pressure
- the flowing refrigerant is cooled.
- the force S is used to avoid the refrigerant from becoming near the critical point.
- a refrigeration apparatus is the refrigeration apparatus according to the tenth aspect of the invention, further comprising a temperature detector.
- the temperature detector is provided near the outlet of the radiator or near the refrigerant inlet of the first expansion mechanism.
- the pressure of the refrigerant from which the first expansion mechanism force has also flowed out is the pressure of ⁇ critical pressure (MPa) —0.3 MPa ⁇ .
- MPa critical pressure
- a refrigeration apparatus is the refrigeration apparatus according to any of the eighth to eleventh aspects of the invention, wherein the second control unit has a control switching means.
- the control switching means switches between refrigerant cooling control and normal control.
- “normal control” is, for example, control giving priority to COP.
- the control switching means switches between refrigerant cooling control and normal control. In this refrigeration apparatus, the control switching means switches between refrigerant cooling control and normal control. For this reason, this refrigeration system can also perform control in consideration of COP.
- the degree of superheat of the refrigerant sucked into the compression mechanism can be kept appropriate, and a sufficient degree of supercooling can be imparted to the refrigerant after passing through the first expansion mechanism.
- a further sufficient degree of supercooling can be imparted to the refrigerant that has passed through the first expansion mechanism.
- the capacity of the first internal heat exchanger can be adjusted.
- the refrigerant wetted by the third expansion mechanism is merged with the refrigerant sucked into the compression mechanism. Therefore, the force S keeps the degree of superheat of the refrigerant sucked into the compression mechanism properly.
- the capacity of the first internal heat exchanger can be adjusted.
- the refrigeration apparatus according to the sixth aspect of the invention for example, when the degree of superheat of the refrigerant sucked into the compression mechanism becomes significantly large, the refrigerant wetted by the third expansion mechanism is merged with the refrigerant sucked into the compression mechanism. Therefore, the force S keeps the degree of superheat of the refrigerant sucked into the compression mechanism properly.
- the force S is used to keep the degree of superheat of the refrigerant sucked into the compression mechanism properly.
- the refrigerant when the refrigerant is expanded to the state near the saturation line by the first expansion mechanism, the refrigerant can be prevented from being in the state near the critical point.
- the refrigerant when the refrigerant is expanded to the state near the saturation line by the first expansion mechanism, the refrigerant can be prevented from being in the state near the critical point.
- the refrigerant when the refrigerant is expanded to a state near the saturation line by the first expansion mechanism, the refrigerant can be prevented from entering a state near the critical point.
- the cooling is performed when the refrigerant is expanded to a state near the saturation line by the first expansion mechanism and the refrigerant may be in a state near the critical point. It can be avoided that the medium becomes in the vicinity of the critical point.
- FIG. 1 is a refrigerant circuit diagram of an air conditioner according to an embodiment of the present invention.
- FIG. 2 is a diagram for explaining refrigerant cooling control by a control device for an air-conditioning apparatus according to an embodiment of the present invention.
- FIG. 3 is a refrigerant circuit diagram of an air-conditioning apparatus according to Modification (A).
- FIG. 4 is a refrigerant circuit diagram of an air conditioner (separate type) according to modification (D).
- FIG. 5 is a refrigerant circuit diagram of an air conditioner (multi-type) according to Modification (D).
- FIG. 6 is a refrigerant circuit diagram of an air-conditioning apparatus according to Modification (G).
- FIG. 7 is a refrigerant circuit diagram of an air conditioner according to Modification (I).
- FIG. 8 is a refrigerant circuit diagram of an air-conditioning apparatus according to Modification (J).
- Control device first control unit, second control unit
- FIG. 1 shows a schematic refrigerant circuit 2 of an air conditioner 1 according to an embodiment of the present invention.
- the air conditioner 1 is an air conditioner that can perform cooling and heating operations using carbon dioxide as a refrigerant.
- the air conditioner 1 mainly includes a refrigerant circuit 2, blower fans 23 and 32, a control device 27, a high-pressure sensor 24, and an intermediate pressure.
- the pressure sensor 26, the first temperature sensor 25, the second temperature sensor 29, and the like are included.
- the refrigerant circuit 2 mainly includes a main refrigerant circuit 3, a first bypass line 4, a gas vent line 5, an oil return line 6, and a second bypass line 7. Each circuit is described in detail below.
- the main refrigerant circuit 3 mainly includes a compressor 11, an oil separator 12, a four-way switching valve 13, an outdoor heat exchanger 14, a first internal heat exchanger 15, a first electric expansion valve 16, a receiver 17, A second internal heat exchanger 18, a second electric expansion valve 20, and an indoor heat exchanger 31 are provided, and each device is connected via a refrigerant pipe as shown in FIG.
- the second bypass line 4 branches off from the refrigerant pipe (hereinafter referred to as the eleventh refrigerant pipe) connecting the second internal heat exchanger 18 and the second electric expansion valve 20, and is switched to four-way switching.
- the third electric expansion valve 19 is disposed in a portion between the branch point with the eleventh refrigerant pipe and the second internal heat exchanger 18.
- the gas vent line 5 is a line that extends from the upper part of the liquid receiver 17 and joins a refrigerant pipe (hereinafter referred to as a thirteenth refrigerant pipe) that connects the first internal heat exchanger 15 and the suction side of the compressor 11.
- An opening / closing valve 51 is arranged in the gas vent line 5.
- the open / close valve 51 is, for example, an electromagnetic valve, and the open / close state of the open / close valve 51 is controlled by a control device 27 described later.
- the oil return line 6 extends from the oil separator 12 and joins the suction pipe of the compressor 11.
- the A capillary 28 is disposed in the oil return line 6.
- the second bypass line 7 is branched from the refrigerant pipe connecting the oil separator 12 and the four-way selector valve 13 and is connected to the junction of the first internal heat exchanger 15 and the gas vent line 5 in the thirteenth refrigerant pipe. It is a line that joins the sandwiched part.
- An opening / closing valve 52 is disposed in the second bypass line 7.
- the on-off valve 52 is, for example, an electromagnetic valve, and its open / close state is controlled by a control device 27 described later. This on-off valve also protects the low-pressure side by injecting high-pressure gas refrigerant when the refrigerant flowing on the suction side of the compressor is overheated or when the pressure on the low-pressure side is too low when the compressor starts. Used to do.
- the air conditioner 1 is a separation-type air conditioner, and includes an indoor unit 30, an outdoor unit 10, a refrigerant liquid piping of the indoor unit 30, a refrigerant liquid of the outdoor unit 10, and the like. It can also be said that the first connecting pipe 41 connecting the pipe and the second connecting pipe 42 connecting the refrigerant gas piping of the indoor unit 30 and the refrigerant gas piping of the outdoor unit 10 can be said.
- the refrigerant liquid pipe of the outdoor unit 10 and the first communication pipe 41 are connected to the refrigerant gas pipe of the outdoor unit 10 via the first shut-off valve 21 of the outdoor unit 10 and the second communication pipe 42 is the outdoor unit. Each of them is connected via 10 second closing valves 22.
- the indoor unit 30 is mainly provided with an indoor heat exchanger 31 and an indoor fan 32.
- the outdoor unit 10 mainly includes a compressor 11, an oil separator 12, a four-way switching valve 13, an outdoor heat exchanger 14, a first internal heat exchanger 15, a first electric expansion valve 16, and a liquid receiver. 17, second internal heat exchanger 18, second electric expansion valve 20, third electric expansion valve 19, on-off valve 51.52, capillary 28, high pressure sensor 24, intermediate pressure sensor 26, first temperature sensor 25, A second temperature sensor 29, a control device 27, and an outdoor fan 23 are arranged.
- the indoor unit 30 mainly includes an indoor heat exchanger 31, an indoor fan 32, and the like.
- the indoor heat exchanger 31 is a heat exchanger for exchanging heat between indoor air that is air in the air-conditioned room and the refrigerant.
- the indoor fan 32 takes in the air in the air-conditioned room into the unit 30 and sends out the conditioned air, which is the air after heat exchange with the refrigerant via the indoor heat exchanger 31, to the air-conditioned room again.
- the indoor unit 30 harmonizes the indoor air taken in by the indoor fan 32 and the liquid refrigerant flowing through the indoor heat exchanger 31 during the cooling operation.
- the outdoor unit 10 is mainly composed of a compressor 11, an oil separator 12, a four-way selector valve 13, an outdoor heat exchanger 14, an outdoor fan 23, a first internal heat exchanger 15, a first electric expansion valve 16, and a liquid receiver. 17, second internal heat exchanger 18, second electric expansion valve 20, third electric expansion valve 19, open / close valve 51, 52, mechanical 28, high pressure sensor 24, intermediate pressure sensor 26, first temperature sensor 25, a second temperature sensor 29, a control device 27, and the like.
- the compressor 11 is a device for sucking low-pressure gas refrigerant flowing through the suction pipe, compressing it into a supercritical state, and discharging it to the discharge pipe.
- the oil separator 12 is a device for separating the refrigerating machine oil mixed in the refrigerant discharged from the compressor 11.
- the four-way switching valve 13 is a valve for switching the flow direction of the refrigerant corresponding to each operation, and between the discharge side of the compressor 11 and the high temperature side of the outdoor heat exchanger 14 during the cooling operation.
- the suction side of the compressor 11 and the gas side of the indoor heat exchanger 31 are connected via the first internal heat exchanger 15, and during the heating operation, the discharge side of the compressor 11 and the second closing valve 22 It is possible to connect the suction side of the compressor 11 and the gas side of the outdoor heat exchanger 14 together.
- the outdoor heat exchanger 14 can cool the high-pressure supercritical refrigerant discharged from the compressor 11 using the air outside the air-conditioning room as a heat source during the cooling operation, and the indoor heat exchanger during the heating operation.
- the liquid refrigerant returning from 31 can be evaporated.
- the outdoor fan 23 is a fan for taking in outdoor air into the unit 10 and exhausting the air after exchanging heat with the refrigerant via the outdoor heat exchanger 14.
- the first internal heat exchanger 15 includes a refrigerant pipe (hereinafter referred to as a fourteenth refrigerant pipe) that connects the low temperature side (or liquid side) of the outdoor heat exchanger 14 and the first electric expansion valve 16; Suction side of compressor 11 And a refrigerant pipe (hereinafter referred to as the fifteenth refrigerant pipe) connecting the four-way selector valve 13 and the heat exchanger.
- a refrigerant pipe hereinafter referred to as a fourteenth refrigerant pipe
- the fifteenth refrigerant pipe connecting the four-way selector valve 13 and the heat exchanger.
- the first electric expansion valve 16 is used to depressurize supercritical refrigerant flowing out from the low temperature side of the outdoor heat exchanger 14 (during cooling operation) or liquid refrigerant flowing through the receiver 17 (during heating operation). It is.
- the liquid receiver 17 is for storing a surplus refrigerant according to the operation mode and the air conditioning load.
- the second internal heat exchanger 18 includes a refrigerant pipe (hereinafter referred to as the 16th refrigerant pipe) connecting the liquid receiver 17 and the second electric expansion valve 20, and a first bypass line 4 (third electric motor).
- This is a heat exchanger configured by arranging the expansion valve 19 and a portion between the merging point of the twelfth refrigerant pipe) in close proximity.
- heat exchange is performed between the saturated refrigerant flowing in the sixteenth refrigerant pipe and the refrigerant flowing in the first bypass line 4 during the cooling operation.
- the second electric expansion valve 20 is a supercritical refrigerant (heating) that flows out from the liquid receiver 17 and flows out from the low temperature side of the indoor heat exchanger 31 (liquid cooling medium that has passed through the second internal heat exchanger 18 (cooling operation)). For reducing the pressure during operation.
- the third electric expansion valve 19 is for depressurizing the liquid cooling medium (during cooling operation) that has flowed out of the liquid receiver 17 and passed through the second internal heat exchanger 18.
- the open / close valves 51 and 52 are controlled by the control device 27 so that the open / close state of the capillaries 28 is for reducing the pressure of the oil-rich refrigerant flowing out of the oil separator 12 and evaporating it. is there.
- the high pressure sensor 24 is provided on the discharge side of the compressor 11.
- the intermediate pressure sensor 26 is provided between the first electric expansion valve 16 and the liquid receiver 17.
- the first temperature sensor 25 is provided near the low temperature side (or liquid side) of the outdoor heat exchanger 14.
- the second temperature sensor 29 is provided on the suction side of the compressor 11!
- the control device 27 includes a high pressure sensor 24, an intermediate pressure sensor 26, a first temperature sensor 25, a second temperature sensor 29, a first electric expansion valve 16, a second electric expansion valve 20, a third electric expansion valve 19, etc. Is connected to the communication terminal, based on the temperature information sent from the first temperature sensor 25, the high pressure information sent from the high pressure sensor 24, and the intermediate pressure information sent from the intermediate pressure sensor 26. Control the opening degree of the first electric expansion valve 16 and the second electric expansion valve 20, and the third electric expansion valve 19 so that the temperature information sent from the second temperature sensor 29 falls within a predetermined range. Control the opening.
- control device 27 is equipped with a control switching function for switching between normal control and refrigerant cooling control based on temperature information and high pressure information of the first temperature sensor 25 during cooling.
- the opening degrees of the first electric expansion valve 16, the second electric expansion valve 20, and the third electric expansion valve 19 are controlled so that COP and the like are improved.
- the refrigerant cooling control the first electric expansion valve 16 and the second electric expansion valve 20 are set so that the state of the refrigerant flowing out from the first electric expansion valve 16 becomes a state on the saturation line and does not become a state near the critical point. Is controlled, and the state of the refrigerant in the liquid receiver 17 is maintained in a saturated state.
- FIG. 2 shows a diagram representing the refrigeration cycle of the air-conditioning apparatus 1 according to the present embodiment on the Mollier diagram of carbon dioxide.
- a ⁇ B indicates the compression process
- B ⁇ C and C are the first cooling process
- B ⁇ C is the cooling in the outdoor heat exchanger 14, C
- D, D ⁇ F and F are the second cooling stroke (D ⁇ F and
- K indicates the critical point (Note that K and D overlap in Fig. 2).
- Tm is a hot spring.
- the first electric expansion valve 16 and the second electric expansion valve 20 are appropriately adjusted to cool the refrigerant flowing out of the first electric expansion valve 16 and remove the refrigerant at the point C.
- the force S can be such that the medium is in the vicinity of the saturation line and not in the vicinity of the critical point.
- the control device 27 uses the first electric expansion valve 15 and the pressure control device 27 so that the pressure indicated by the intermediate pressure sensor 26 is equal to or lower than the pressure of ⁇ critical pressure (MPa) —0.3 (MPa) ⁇ .
- the second electric expansion valve 20 is controlled.
- the pressure of ⁇ critical pressure (MPa) —0 ⁇ 3 (MPa) ⁇ is determined as follows. Based on the results of tests conducted by the inventor, the pressure between the first electric expansion valve 16 and the second electric expansion valve 20 (hereinafter referred to as intermediate pressure) is controlled within ⁇ 0. IMPa from the target value in the case of refrigerant.
- the operation of the air conditioner 1 will be described with reference to FIG.
- the air conditioner 1 can perform a cooling operation and a heating operation as described above.
- the four-way switching valve 13 is in the state shown by the solid line in FIG. 1, that is, the discharge side of the compressor 11 is connected to the high temperature side of the outdoor heat exchanger 14, and the suction side of the compressor 11 is the first side.
- the state is connected to the second closing valve 22 via the internal heat exchanger 15. At this time, the first closing valve 21 and the second closing valve 22 are opened.
- the compressor 11 When the compressor 11 is started in the state of the refrigerant circuit 2, the gas refrigerant is sucked into the compressor 11 and compressed into a supercritical state, and then the oil separator 12 and the four-way switching valve 13 are used. Then, it is sent to the outdoor heat exchanger 14 via and is cooled in the outdoor heat exchanger 14. At this time, the oil separator 12 separates the refrigerating machine oil mixed in the refrigerant. The separated refrigeration oil is sucked into the compressor 11 again through the oil return line 6. The cooled supercritical refrigerant is sent to the first electric expansion valve 16 via the first internal heat exchanger 15.
- the supercritical refrigerant is cooled by the low-temperature gas refrigerant flowing through the first 15 refrigerant pipe of the first internal heat exchanger 15.
- the supercritical refrigerant sent to the first electric expansion valve 16 is decompressed and saturated, and then sent to the second electric expansion valve 20 via the liquid receiver 17 and the second internal heat exchanger 18. And is also sent to the third electric expansion valve 19.
- the saturated refrigerant flowing through the second electric expansion valve 20 is cooled by the refrigerant depressurized by the third electric expansion valve 19 and flowing into the first bypass line 4.
- the saturated refrigerant sent to the second electric expansion valve 20 is reduced in pressure to become liquid refrigerant, and then supplied to the indoor heat exchanger 31 via the first closing valve 21 to cool the indoor air and evaporate. It becomes a gas refrigerant.
- the gas refrigerant passes through the second closing valve 22 and the four-way switching valve 13, and is then decompressed by the third electric expansion valve 19 and merged with the refrigerant that has flowed into the first bypass line 4. 1 Flows into the internal heat exchanger 15. The combined refrigerant is heated by the high-temperature and high-pressure supercritical refrigerant flowing in the fourteenth refrigerant pipe of the first internal heat exchanger 15 and then sucked into the compressor 11 again.
- control device 27 appropriately switches between the normal control and the refrigerant cooling control based on the temperature information and the high pressure information as described above.
- the four-way switching valve 13 is in the state indicated by the broken line in FIG. 1, that is, the discharge side of the compressor 11 is connected to the second closing valve 22, and the suction side of the compressor 11 is the outdoor heat exchanger 1 4 is connected to the gas side.
- the first closing valve 21 and the second closing valve 22 are opened.
- the compressor 11 When the compressor 11 is started in the state of the refrigerant circuit 2, the gas refrigerant is sucked into the compressor 11 and compressed to become a supercritical state, and then the oil separator 12, the four-way selector valve 13 are used. , And via the second shut-off valve 22 to the indoor heat exchanger 31. At this time, the oil separator 12 separates the refrigerating machine oil mixed in the refrigerant. The separated refrigerating machine oil is sucked into the compressor 11 again through the oil return line 6. The supercritical refrigerant is cooled while heating the indoor air in the indoor heat exchanger 31. The cooled supercritical refrigerant is sent to the second electric expansion valve 20 through the first closing valve 21.
- the supercritical refrigerant does not flow into the first bypass line 4.
- the supercritical refrigerant sent to the second electric expansion valve 20 is depressurized and saturated, and then sent to the first electric expansion valve 16 via the liquid receiver 17.
- the saturated refrigerant sent to the first electric expansion valve 16 is reduced in pressure to become a liquid refrigerant, and then sent to the outdoor heat exchanger 14, where it is evaporated in the outdoor heat exchanger 14 to become a gas refrigerant. Then, this gas refrigerant is again sucked into the compressor 11 via the four-way switching valve 13.
- the first bypass line 4 branched from the eleventh refrigerant pipe and joined to the twelfth refrigerant pipe passes through the second internal heat exchanger 18.
- a third electric expansion valve 19 is disposed between the branch point with the eleventh refrigerant pipe and the second internal heat exchanger 18.
- the state of the refrigerant flowing out of the first electric expansion valve 16 becomes a state on the saturation line, and the refrigerant pressure at that time is ⁇ critical pressure (MPa) —0.3 (
- the first electric expansion valve 16 and the second electric expansion valve 20 are controlled so as to be equal to or lower than the pressure of (MPa). Therefore, in this air conditioner 1, the first electric expansion valve 16 saturates the refrigerant.
- the force S is used to avoid the refrigerant becoming in the vicinity of the critical point when expanded to the state near the sum line.
- the air conditioner 1 In the air conditioner 1 according to the present embodiment, a function for switching between the refrigerant cooling control and the normal control is mounted on the control device 27. For this reason, the air conditioner 1 can also perform control in consideration of COP.
- the present invention is applied to a separate type air conditioner 1 in which one indoor unit 30 is provided for one outdoor unit 10.
- the present invention is not shown in FIG.
- the present invention may be applied to a multi-type air conditioner 101 in which a plurality of indoor units are provided for one outdoor unit.
- the same reference numerals are used for the same components as those of the air conditioner 1 according to the previous embodiment.
- reference numeral 102 indicates a refrigerant circuit
- reference numeral 103 indicates a main refrigerant circuit
- reference numeral 110 indicates an outdoor unit
- reference numerals 30a and 30b indicate indoor units
- reference numerals 31a and 31b indicate indoor heat exchange.
- 32a and 32b indicate indoor fans
- 33a and 33b indicate second electric expansion valves
- 34a and 34b indicate indoor control devices
- 141 and 142 indicate connecting pipes. Yes.
- the control device 27 controls the second electric expansion valves 33a and 33b via the indoor control devices 34a and 34b.
- the second electric expansion valves 33a, 33b force S and the force second electric expansion valves 33a, 33b accommodated in the indoor units 30a, 30b may be accommodated in the outdoor unit 110.
- the first internal heat exchanger 15 in which the 14th refrigerant pipe and the 15th refrigerant pipe are disposed in close proximity is employed.
- a tube heat exchanger may be employed.
- the second internal heat exchanger 18 in which the 16th refrigerant pipe and the first bypass line 4 are disposed close to each other is employed, but as the second internal heat exchanger, A double tube heat exchanger may be employed.
- the refrigerant flowing out of the evaporator 31 joins with the refrigerant flowing in from the bypass line 204 after passing through the first internal heat exchanger 15.
- the third electric expansion valve 19 is controlled so that the refrigerant flowing through the bypass line 204 becomes wet when the refrigerant flowing out of the evaporator 31 is excessively heated, the degree of superheating of the refrigerant is lowered and is appropriately adjusted. It can be stored in a positive degree of superheat.
- FIG. 4 the same components as those of the air-conditioning apparatus 1 according to the previous embodiment are denoted by the same reference numerals.
- Reference numerals 201, 202, 204, and 210 newly added indicate an air conditioner, a refrigerant circuit, a bypass line, and an outdoor unit, respectively.
- this technique may be applied to the multi-type air conditioner 301 (see FIG. 5).
- FIG. 5 the same reference numerals are given to the same components as those of the previous embodiment and the air conditioners 1 and 201 according to the above.
- Newly added reference numerals 302 and 310 denote a refrigerant circuit and an outdoor unit, respectively.
- the force S and the high pressure sensor 24 provided with the high pressure sensor 24 on the discharge side of the compressor 11 may be removed.
- the first electric expansion valve 16 and the second electric expansion so that the state of the refrigerant is on the saturation line and the refrigerant pressure at that time is equal to or lower than the pressure of ⁇ critical pressure (MPa) -0.3 (MPa) ⁇ .
- the opening degree of the valve 20 and the third electric expansion valve 19 may be controlled.
- the first internal heat exchanger 15 and the second internal heat Force in which the exchanger 18, the first electric expansion valve 16, the liquid receiver 17, the second electric expansion valve 20, and the like are arranged in the outdoor unit 10
- the second electric expansion valve 20 is arranged in the indoor unit 30! /, Or! /.
- the electric expansion valve is adopted as the refrigerant pressure reducing means.
- an expander 116 or the like may be adopted as shown in FIG. In such an air conditioner 401, it is necessary to arrange a bridge circuit 117 on the refrigerant inflow side of the expander 116 in the outdoor unit 410 as shown in FIG. This is because the expander 11 6 has directionality.
- the temperature sensor 25 is provided in the vicinity of the low temperature side (or liquid side) port of the outdoor heat exchanger 14! /, But the temperature sensor 25 is the first one.
- the electric expansion valve 16 may be provided in the vicinity of the opening on the first internal heat exchanger side.
- the first bypass line 4 is branched from the refrigerant pipe connecting the second internal heat exchanger 18 and the second electric expansion valve 20, but the first bypass line is shown in FIG.
- the refrigerant may be branched from a refrigerant pipe connecting the outdoor heat exchanger 14 and the first internal heat exchanger 15.
- reference numeral 501 indicates an air conditioner according to this modification
- reference numeral 510 indicates an outdoor unit according to this modification
- reference numeral 504 indicates a first bypass line according to this modification.
- the first bypass line 4 branches off from the refrigerant pipe connecting the second internal heat exchanger 18 and the second electric expansion valve 20, but the first bypass line is shown in FIG.
- the refrigerant may be branched from a refrigerant pipe connecting the first internal heat exchanger 15 and the first electric expansion valve 16.
- reference numeral 601 indicates an air conditioner according to this modification
- reference numeral 610 indicates an outdoor unit according to this modification
- reference numeral 604 indicates a first bypass line according to this modification.
- the first bypass line 4 is branched from the refrigerant pipe connecting the second internal heat exchanger 18 and the second electric expansion valve 20, but the first bypass line is the first one.
- the refrigeration apparatus according to the present invention has a feature that a sufficient degree of supercooling can be imparted to the refrigerant after passing through the first expansion mechanism, and is particularly useful for a refrigeration apparatus that employs carbon dioxide or the like as the refrigerant. .
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07806911.9A EP2068096B1 (en) | 2006-09-11 | 2007-09-07 | Refrigeration device |
CN2007800334123A CN101512247B (zh) | 2006-09-11 | 2007-09-07 | 制冷装置 |
US12/440,045 US8181480B2 (en) | 2006-09-11 | 2007-09-07 | Refrigeration device |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP2006-246155 | 2006-09-11 | ||
JP2006246155 | 2006-09-11 | ||
JP2007-053351 | 2007-03-02 | ||
JP2007053351A JP5324749B2 (ja) | 2006-09-11 | 2007-03-02 | 冷凍装置 |
Publications (1)
Publication Number | Publication Date |
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WO2008032645A1 true WO2008032645A1 (fr) | 2008-03-20 |
Family
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PCT/JP2007/067470 WO2008032645A1 (fr) | 2006-09-11 | 2007-09-07 | dispositif de réfrigération |
Country Status (5)
Country | Link |
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US (1) | US8181480B2 (ja) |
EP (1) | EP2068096B1 (ja) |
JP (1) | JP5324749B2 (ja) |
CN (1) | CN101512247B (ja) |
WO (1) | WO2008032645A1 (ja) |
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CN102348940A (zh) * | 2009-03-19 | 2012-02-08 | 大金工业株式会社 | 空调装置 |
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EP3217115B1 (en) | 2014-11-04 | 2019-12-25 | Mitsubishi Electric Corporation | Air conditioning apparatus |
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JP6657613B2 (ja) * | 2015-06-18 | 2020-03-04 | ダイキン工業株式会社 | 空気調和装置 |
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DE102017205484A1 (de) * | 2017-03-31 | 2018-10-04 | Siemens Aktiengesellschaft | Wärmepumpe und Verfahren zum Betreiben einer Wärmepumpe |
GB2581720C (en) * | 2017-11-29 | 2021-10-20 | Mitsubishi Electric Corp | Refrigeration Apparatus and Outdoor unit |
JP7117945B2 (ja) * | 2018-08-30 | 2022-08-15 | サンデン株式会社 | 車両空調装置用ヒートポンプシステム |
CN111578389B (zh) * | 2020-05-09 | 2021-12-10 | 宁波奥克斯电气股份有限公司 | 一种外机换热器、防高温控制装置、控制方法及空调器 |
JP2023062750A (ja) * | 2021-10-22 | 2023-05-09 | パナソニックIpマネジメント株式会社 | 空気調和機 |
CN114353171A (zh) * | 2022-01-07 | 2022-04-15 | 宁波奥克斯电气股份有限公司 | 冷媒减少化的空调器及空调*** |
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Also Published As
Publication number | Publication date |
---|---|
JP5324749B2 (ja) | 2013-10-23 |
EP2068096A1 (en) | 2009-06-10 |
EP2068096B1 (en) | 2017-08-16 |
US20100180612A1 (en) | 2010-07-22 |
US8181480B2 (en) | 2012-05-22 |
CN101512247A (zh) | 2009-08-19 |
JP2008096093A (ja) | 2008-04-24 |
EP2068096A4 (en) | 2013-03-27 |
CN101512247B (zh) | 2010-10-13 |
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