WO2020202553A1 - Appareil à cycle frigorifique - Google Patents

Appareil à cycle frigorifique Download PDF

Info

Publication number
WO2020202553A1
WO2020202553A1 PCT/JP2019/015142 JP2019015142W WO2020202553A1 WO 2020202553 A1 WO2020202553 A1 WO 2020202553A1 JP 2019015142 W JP2019015142 W JP 2019015142W WO 2020202553 A1 WO2020202553 A1 WO 2020202553A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
refrigerant
port
circulation direction
node
Prior art date
Application number
PCT/JP2019/015142
Other languages
English (en)
Japanese (ja)
Inventor
孔明 仲島
尚季 涌田
雄亮 田代
Original Assignee
三菱電機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to CN201980094987.9A priority Critical patent/CN113646593B/zh
Priority to JP2021511055A priority patent/JPWO2020202553A1/ja
Priority to PCT/JP2019/015142 priority patent/WO2020202553A1/fr
Priority to US17/432,543 priority patent/US20220136741A1/en
Priority to EP19923242.2A priority patent/EP3951284A4/fr
Publication of WO2020202553A1 publication Critical patent/WO2020202553A1/fr

Links

Images

Classifications

    • 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
    • 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
    • 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
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B2313/006—Compression machines, plants or systems with reversible cycle not otherwise provided for two pipes connecting the outdoor side to the indoor side with multiple indoor units
    • 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
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0405—Refrigeration circuit bypassing means for the desuperheater
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0417—Refrigeration circuit bypassing means for the subcooler
    • 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
    • F25B2400/04—Refrigeration circuit bypassing means
    • F25B2400/0419—Refrigeration circuit bypassing means for the superheater
    • 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
    • F25B2400/16—Receivers
    • 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
    • F25B2600/2507—Flow-diverting valves
    • 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

Definitions

  • the present invention relates to a refrigeration cycle apparatus in which the circulation direction of the refrigerant is switched between the first circulation direction and the second circulation direction opposite to the first circulation direction.
  • Patent Document 1 discloses an air conditioner in which each of an indoor unit and an outdoor unit includes an expansion valve, and the two expansion valves are connected via an extension pipe. ..
  • the refrigerant that has been decompressed by the expansion valve of the indoor unit during the heating operation and is in a gas-liquid two-phase state flows through the extension pipe, and is decompressed by the expansion valve of the outdoor unit during the cooling operation.
  • the refrigerant in a gas-liquid two-phase state flows through the extension pipe.
  • the refrigerant (wet steam) in the gas-liquid two-phase state flows through the extension pipe in both the heating operation and the cooling operation. Since the density of the wet vapor is smaller than the density of the liquid refrigerant (liquid refrigerant), the amount of the refrigerant circulating in the air conditioner can be reduced.
  • the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to suppress a decrease in controllability of a refrigeration cycle apparatus.
  • the circulation direction of the refrigerant is switched between the first circulation direction and the second circulation direction opposite to the first circulation direction.
  • the refrigeration cycle apparatus includes a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a first expansion valve, and a second expansion valve.
  • the first circulation direction is the circulation direction in the order of the compressor, the first heat exchanger, the first expansion valve, the third heat exchanger, the fourth heat exchanger, the second expansion valve, and the second heat exchanger. ..
  • the refrigerant from the third heat exchanger exchanges heat with the refrigerant from the second heat exchanger.
  • the refrigerant from the fourth heat exchanger exchanges heat with the refrigerant from the first heat exchanger.
  • the refrigerant from the third heat exchanger exchanges heat with the refrigerant from the second heat exchanger in the fourth heat exchanger.
  • the refrigerant from the fourth heat exchanger exchanges heat with the refrigerant from the first heat exchanger in the third heat exchanger, so that the controllability is lowered. Can be suppressed.
  • FIG. 1 It is a figure which also shows the functional structure of the air conditioner which is an example of the refrigeration cycle apparatus which concerns on Embodiment 1, and the flow of the refrigerant in a cooling operation. It is a figure which also shows the functional structure of the air conditioner of FIG. 1 and the flow of a refrigerant in a heating operation. It is a functional block diagram which shows the structure of the control device of FIG. 1 and FIG. It is a figure which also shows the functional structure of the air conditioner which concerns on a comparative example, and the flow of a refrigerant in a cooling operation. It is a figure which also shows the functional structure of the air conditioner of FIG. 4 and the flow of a refrigerant in a heating operation.
  • FIG. 5 is a Ph diagram showing a change in the state of the refrigerant circulating in the air conditioner of FIG.
  • FIG. 5 is a Ph diagram showing a change in the state of the refrigerant circulating in the air conditioner of FIG.
  • FIG. 1 is a diagram showing the functional configuration of the air conditioner 100, which is an example of the refrigeration cycle device according to the first embodiment, and the flow of the refrigerant in the cooling operation.
  • the air conditioner 100 includes an outdoor unit 110 and an indoor unit 120.
  • the outdoor unit 110 and the indoor unit 120 are connected by extension pipes ep1 and ep2, respectively.
  • the air conditioner 100 air-conditions the indoor space in which the indoor unit 120 is arranged.
  • the outdoor unit 110 includes a compressor 1, a four-way valve 2, a switching unit 3 (first switching unit), a heat exchanger 4 (first heat exchanger), an expansion valve 5A (first expansion valve), and the like. It includes an internal heat exchanger 6 (third heat exchanger) and a control device 10.
  • the indoor unit 120 includes an internal heat exchanger 7 (fourth heat exchanger), an expansion valve 5B (second expansion valve), a heat exchanger 8 (second heat exchanger), and a switching unit 9 (second switching). Part) and is included.
  • the expansion valves 5A and 5B have a similar structure.
  • the control device 10 may be included in the indoor unit 120, or may be provided separately from the outdoor unit 110 and the indoor unit 120.
  • the refrigerant circulates in the compressor 1, the four-way valve 2, the heat exchanger 4, the expansion valve 5A, the internal heat exchanger 6, the internal heat exchanger 7, the expansion valve 5B, the heat exchanger 8, and the four-way valve 2. It circulates in the direction (first circulation direction).
  • the refrigerant flowing out of the outdoor unit 110 flows into the indoor unit 120 via the extension pipe ep1.
  • the refrigerant flowing out of the indoor unit 120 flows into the outdoor unit 110 via the extension pipe ep2.
  • the heat exchanger 4 functions as a condenser
  • the heat exchanger 8 functions as an evaporator.
  • the switching unit 3 includes a check valve 31 (first check valve) and a check valve 32 (second check valve).
  • the internal heat exchanger 6 is connected between the output port of the check valve 31 and the input port of the check valve 32.
  • the output port of the check valve 31 is connected to the heat exchanger 4.
  • the input port of the check valve 31 communicates with the discharge port of the compressor 1 via the four-way valve 2.
  • the refrigerant from the four-way valve 2 passes through the check valve 31 and heads for the heat exchanger 4 without passing through the check valve 32. That is, the switching unit 3 guides the refrigerant from the compressor 1 to the heat exchanger 4 without passing through the internal heat exchanger 6.
  • the pressure of the refrigerant flowing out of the check valve 31 is smaller than the pressure flowing into the check valve 31 due to the pressure loss caused by the check valve 31. Therefore, most of the refrigerant from the check valve 31 goes to the heat exchanger 4.
  • the switching unit 9 includes a check valve 91 (third check valve) and a check valve 92 (fourth check valve).
  • the internal heat exchanger 7 is connected between the input port of the check valve 91 and the output port of the check valve 92.
  • the output port of the check valve 91 is connected to the input ports of the heat exchanger 8 and the check valve 92.
  • the switching unit 9 guides the refrigerant from the heat exchanger 8 to the compressor 1 via the internal heat exchanger 7.
  • the refrigerant from the internal heat exchanger 6 exchanges heat with the refrigerant from the heat exchanger 8.
  • the pressure of the refrigerant flowing out of the internal heat exchanger 7 is smaller than the pressure flowing into the check valve 92 due to the pressure loss caused by the check valve 92 and the internal heat exchanger 7. Therefore, most of the refrigerant from the internal heat exchanger 7 goes to the four-way valve 2.
  • the node N1 is a node through which the refrigerant flowing from the four-way valve 2 to the compressor 1 passes.
  • the node N2 is a node through which the refrigerant flowing from the compressor 1 to the check valve 31 passes.
  • the node N3 is a node through which the refrigerant flowing from the check valve 31 to the heat exchanger 4 passes.
  • the node N4 is a node through which the refrigerant flowing from the heat exchanger 4 to the expansion valve 5A passes.
  • the node N5 is a node through which the refrigerant flowing from the expansion valve 5A to the internal heat exchanger 6 passes.
  • the node N6 is a node through which the refrigerant flowing from the internal heat exchanger 6 to the extension pipe ep1 passes.
  • the node N7 is a node through which the refrigerant flowing from the extension pipe ep1 to the internal heat exchanger 7 passes.
  • the node N8 is a node through which the refrigerant flowing from the internal heat exchanger 7 to the expansion valve 5B passes.
  • the node N9 is a node through which the refrigerant flowing from the expansion valve 5B to the heat exchanger 8 passes.
  • the node N10 is a node through which the refrigerant flowing from the heat exchanger 8 to the internal heat exchanger 7 passes.
  • the node N11 is a node through which the refrigerant flowing from the internal heat exchanger 7 to the extension pipe ep2 passes.
  • the node N12 is a node through which the refrigerant flowing from the extension pipe ep2 to the four-way valve 2 passes.
  • the control device 10 determines the amount of refrigerant discharged by the compressor 1 per unit time so that the temperature of the indoor space becomes the target temperature (for example, the temperature set by the user). Control.
  • the control device 10 has an expansion valve 5A so that the pressure difference between the refrigerant before being discharged from the compressor 1 and depressurized and the refrigerant before being depressurized and sucked into the compressor 1 is within a desired range.
  • the opening degree and the opening degree of the expansion valve 5B are controlled.
  • the expansion valves 5A and 5B may be controlled so that the degree of superheating and the degree of supercooling of the refrigerant become target values.
  • the control device 10 controls the four-way valve 2 to switch the circulation direction of the refrigerant between the cooling operation and the heating operation.
  • FIG. 2 is a diagram showing the functional configuration of the air conditioner 100 of FIG. 1 and the flow of the refrigerant in the heating operation.
  • the refrigerants are the compressor 1, the four-way valve 2, the heat exchanger 8, the expansion valve 5B, the internal heat exchanger 7, the internal heat exchanger 6, the expansion valve 5A, and the heat exchanger. 4. Circulates in the circulation direction (second circulation direction) of the four-way valve 2.
  • the refrigerant flowing out of the outdoor unit 110 flows into the indoor unit 120 via the extension pipe ep2.
  • the refrigerant flowing out of the indoor unit 120 flows into the outdoor unit 110 via the extension pipe ep1.
  • the heat exchanger 8 functions as a condenser and the heat exchanger 4 functions as an evaporator.
  • the input port of the check valve 31 communicates with the suction port of the compressor 1 via the four-way valve 2.
  • the refrigerant from the four-way valve 2 passes through the check valve 91 and goes to the heat exchanger 8 without passing through the internal heat exchanger 7. That is, the switching unit 9 guides the refrigerant from the compressor 1 to the heat exchanger 8 without passing through the internal heat exchanger 7.
  • the pressure of the refrigerant flowing out of the check valve 91 is smaller than the pressure flowing into the check valve 91 due to the pressure loss caused by the check valve 91. Therefore, most of the refrigerant from the check valve 91 goes to the heat exchanger 8.
  • the refrigerant from the heat exchanger 4 does not pass through the check valve 31, but passes through the internal heat exchanger 6 and the check valve 32 in this order and heads for the four-way valve 2. That is, the switching unit 3 guides the refrigerant from the heat exchanger 4 to the compressor 1 via the internal heat exchanger 6.
  • the refrigerant from the internal heat exchanger 7 exchanges heat with the refrigerant from the heat exchanger 4.
  • the pressure of the refrigerant flowing out of the check valve 32 is smaller than the pressure flowing into the internal heat exchanger 6 due to the pressure loss caused by the internal heat exchanger 6 and the check valve 32. Therefore, most of the refrigerant from the check valve 32 goes to the four-way valve 2.
  • the node N1 is a node through which the refrigerant flowing from the four-way valve 2 to the compressor 1 passes.
  • the node N12 is a node through which the refrigerant flowing from the four-way valve 2 to the extension pipe ep2 passes.
  • the node N11 is a node through which the refrigerant flowing from the extension pipe ep2 to the check valve 91 passes.
  • the node N10 is a node through which the refrigerant flowing from the check valve 91 to the heat exchanger 8 passes.
  • the node N9 is a node through which the refrigerant flowing from the heat exchanger 8 to the expansion valve 5B passes.
  • the node N8 is a node through which the refrigerant flowing from the expansion valve 5B to the internal heat exchanger 7 passes.
  • the node N7 is a node through which the refrigerant flowing from the internal heat exchanger 7 to the extension pipe ep1 passes.
  • the node N6 is a node through which the refrigerant flowing from the extension pipe ep1 to the internal heat exchanger 6 passes.
  • the node N5 is a node through which the refrigerant flowing from the internal heat exchanger 6 to the expansion valve 5A passes.
  • the node N4 is a node through which the refrigerant flowing from the expansion valve 5A to the heat exchanger 4 passes.
  • the node N3 is a node through which the refrigerant flowing from the heat exchanger 4 to the internal heat exchanger 6 passes.
  • the node N2 is a node through which the refrigerant flowing from the internal heat exchanger 6 to the four-way valve 2 passes.
  • FIG. 3 is a functional block diagram showing the configuration of the control device 10 of FIGS. 1 and 2.
  • the control device 10 includes a processing circuit 11, a memory 12, and an input / output unit 13.
  • the processing circuit 11 may be dedicated hardware or a CPU (Central Processing Unit) that executes a program stored in the memory 12.
  • the processing circuit 11 is dedicated hardware, the processing circuit 11 is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), an FGA (Field). Programmable Gate Array) or a combination of these is applicable.
  • the processing circuit 11 is a CPU, the function of the control device 10 is realized by software, firmware, or a combination of software and firmware.
  • the software or firmware is described as a program and stored in the memory 12.
  • the processing circuit 11 reads and executes the program stored in the memory.
  • the memory 12 includes a non-volatile or volatile semiconductor memory (for example, RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), or EEPROM (Electrically Erasable Programmable Read Only Memory). )), Magnetic disc, flexible disc, optical disc, compact disc, mini disc, or DVD (Digital Versatile Disc) is included.
  • the CPU is also called a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, a processor, or a DSP (Digital Signal Processor).
  • FIG. 4 is a diagram showing the functional configuration of the air conditioner 900 according to the comparative example and the flow of the refrigerant in the cooling operation.
  • FIG. 5 is a diagram showing the functional configuration of the air conditioner 900 of FIG. 4 and the flow of the refrigerant in the heating operation.
  • the internal heat exchangers 6 and 7 and the switching portions 3 and 9 are removed from the air conditioner 100 shown in FIGS. 1 and 2, and the expansion valves 5A and 5B are the expansion valves 5C. It is a configuration replaced with 5D respectively.
  • the expansion valves 5C and 5D have a similar structure. Other than these, the same applies, so the description will not be repeated.
  • the circulation direction of the refrigerant is switched between the cooling operation and the heating operation.
  • the liquid refrigerant flows into the expansion valve 5C
  • the wet vapor flows into the expansion valve 5D.
  • the heating operation the liquid refrigerant flows into the expansion valve 5D
  • the wet vapor flows into the expansion valve 5C.
  • FIG. 6 is a diagram showing an example of the internal structure of the expansion valve 5 used in the air conditioner 100 of FIGS. 1 and 2 and the air conditioner 900 of FIGS. 4 and 5.
  • the expansion valve 5 includes a main body 51, a valve body 52, a stepping motor 53, and joint pipes 54 and 55.
  • Valve chambers 511 and 512 are formed inside the main body 51, and both communicate with each other via a valve seat 513 which is a flow hole for a refrigerant.
  • the valve seat 513 is, for example, a cylindrical hole.
  • the joint pipe 54 is connected to the main body 51 so as to communicate the outside with the valve chamber 511.
  • the joint pipe 55 is connected to the main body 51 so as to communicate the outside with the valve chamber 512.
  • the valve body 52 is arranged from the stepping motor 53 toward the valve seat 513 via the valve chamber 511.
  • the tip portion 521 of the valve body 52 has a pointed shape, for example, a conical shape.
  • the diameter of the valve body 52 is substantially equal to the diameter of the valve seat 513.
  • the valve body 52 is moved in the direction of the arrow M1 by the stepping motor 53, and the position is determined.
  • the position of the valve body 52 determines the proportion of the tip portion 521 blocking the valve seat 513. That is, the opening degree of the expansion valve 5 is determined by the stepping motor 53, and the flow rate passing through the valve seat 513 per unit time and the depressurizing action of the expansion valve 5 are adjusted.
  • the Cv value is obtained from the fluid specifications of the refrigeration cycle device and compared with the Cv value indicated by the valve manufacturer to determine the valve type and the diameter of the valve seat of the expansion valve. Often set. Comparison of Cv values is one of the simple methods used when selecting an expansion valve.
  • the Cv value is "water at a temperature of 60 ° F (about 15.5 ° C) flowing through the valve when the pressure difference is 1 lb / in 2 [6.895 kPa] at a specific opening of the valve (expansion valve).
  • the Cv value is represented by the following equation (1).
  • ⁇ is a constant
  • Gr is the refrigerant flow rate [kg / s]
  • ⁇ P is the pressure difference [MPa] between the refrigerant flowing into the expansion valve and the refrigerant flowing out of the expansion valve.
  • ⁇ is the density [kg / m 3 ] of the refrigerant flowing into the expansion valve.
  • FIG. 7 is an enlarged view of the vicinity of the tip portion 521 and the valve seat 513 of the expansion valve 5 of FIG.
  • the diameter D2 of the tip portion 521 shown in FIG. 7B is larger than the diameter D1 of the tip portion 521 shown in FIG. 7A.
  • the maximum value Cv2 of the Cv value of the expansion valve 5 shown in FIG. 7 (b) is shown in FIG. 7 (a). It is larger than the maximum value Cv1 of the Cv value of the expansion valve 5 shown.
  • the height of the tip portion 521 is equal at H1 and the minimum value of the Cv value is also equal at Cv0. ..
  • FIG. 8 is a diagram showing the relationship between the opening degree of the expansion valve and the Cv value.
  • the relationship R1 shows the relationship between the opening degree of the expansion valve 5 in FIG. 7A and the Cv value.
  • the relationship R2 shows the relationship between the opening degree of the expansion valve 5 and the Cv value in FIG. 7B.
  • the relationship between the opening degree of the expansion valve and the Cv value is, for example, a monotonically increasing relationship, and FIG. 8 shows a case where each of the relationships R1 and R2 has a linear relationship.
  • the opening degree Omin is the minimum opening degree of the expansion valve 5
  • the opening degree Omax is the maximum opening degree of the expansion valve 5.
  • the opening difference Od is an opening difference corresponding to the minimum operation amount of the step motor of the expansion valve 5.
  • the slope of the straight line representing the relationship R2 is larger than the slope of the straight line representing the relationship R1.
  • the resolution Rs2 of the Cv value of the expansion valve 5 in FIG. 7 (b) is the Cv value of the expansion valve 5 in FIG. 7 (a). The resolution is larger than Rs1.
  • the refrigerant flowing into the expansion valves 5A and 5B is cooled by the internal heat exchangers 6 and 7, respectively.
  • the density of the refrigerant flowing into the expansion valves 5A and 5B can be made higher than the density of the refrigerant flowing into the expansion valves 5C and 5D of the air conditioner 900, so that the resolution of the expansion valves 5A and 5B can be improved.
  • 5D resolution can be made smaller. Since the controllability of the expansion valves 5A and 5B is improved more than the controllability of the expansion valves 5C and 5D, the controllability of the air conditioner 100 can be improved more than the controllability of the air conditioner 900.
  • FIG. 9 is a Ph diagram showing a change in the state of the refrigerant circulating in the air conditioner 100 of FIG.
  • FIG. 10 is a Ph diagram showing a change in the state of the refrigerant circulating in the air conditioner 100 of FIG.
  • Each of the states shown in FIGS. 9 and 10 corresponds to the state of the refrigerant at each of the nodes N1 to N12 of FIGS. 1 and 2.
  • Curves LC and GC represent saturated liquid lines and saturated vapor lines, respectively.
  • the saturated liquid line LC and the saturated vapor line GC are connected at the critical point CP.
  • the refrigerant in the state on the saturated liquid line LC and the state in which the enthalpy is lower than the enthalpy in the state on the saturated liquid line LC is a liquid refrigerant.
  • the liquid refrigerant region includes a saturated liquid line LC.
  • the refrigerant in the state contained in the region between the saturated liquid line LC and the saturated steam line GC is wet steam.
  • the refrigerant having a higher enthalpy than the enthalpy in the state on the saturated steam line GC and the state on the saturated steam line GC is a gaseous refrigerant (gas refrigerant).
  • the region of the gas refrigerant includes a saturated vapor line GC.
  • the process from the state of node N1 to the state of node N2 shows the adiabatic compression process by the compressor 1. Since the state of the refrigerant flowing from the compressor 1 to the heat exchanger 4 hardly changes, the state of the node N3 is almost the same as the state of the node N2.
  • the process from the state of node N3 to the state of node N4 shows the condensation process by the heat exchanger 4 that functions as a condenser.
  • the state of node N4 is included in the region of the liquid refrigerant.
  • the liquid refrigerant of the node N4 flows into the expansion valve 5A.
  • the process from the state of node N4 to the state of node N5 shows an adiabatic expansion process by the expansion valve 5A.
  • the state of node N5 is included in the region of moist steam.
  • the refrigerant from the compressor 1 goes to the heat exchanger 4 without passing through the internal heat exchanger 6. Since heat exchange between the refrigerants is hardly performed in the internal heat exchanger 6, the state of the node N6 is almost the same as the state of the node N5.
  • a pressure loss due to the extension pipe ep1 occurs.
  • the state of node N7 is also included in the region of moist steam like the state of node N6. That is, in the cooling operation, the moist steam passes through the extension pipe ep1.
  • the process from the state of node N7 to the state of node N8 shows the cooling process in the internal heat exchanger 7.
  • the state of the node N8 is a state in which the enthalpy has moved from the state of the node N7 in a direction in which the enthalpy decreases, and is included in the liquid refrigerant region.
  • the liquid refrigerant in the state of the node N8 flows into the expansion valve 5B.
  • the process from the state of the node N8 to the state of the node N9 shows an adiabatic expansion process by the expansion valve 5B.
  • the process from the state of node N9 to the state of node N10 shows the evaporation process by the heat exchanger 8 which functions as an evaporator.
  • the process from the state of node N10 to the state of node N11 shows the heating process by the internal heat exchanger 7.
  • a pressure loss due to the extension pipe ep2 occurs. Since there is almost no change of state in the refrigerant flowing from the node N12 to the node N1 via the four-way valve 2, the state of the node N1 is almost the same as that of the node N12.
  • the process from the state of node N1 to the state of node N12 shows an adiabatic compression process by the compressor 1.
  • a pressure loss due to the extension pipe ep2 occurs.
  • the state of the refrigerant flowing from the extension pipe ep2 to the heat exchanger 8 hardly changes, the state of the node N10 is almost the same as the state of the node N11.
  • the process from the state of node N10 to the state of node N9 shows the condensation process by the heat exchanger 8 that functions as a condenser.
  • the state of node N9 is included in the region of the liquid refrigerant.
  • the liquid refrigerant in the state of the node N9 flows into the expansion valve 5B.
  • the process from the state of node N9 to the state of node N8 shows an adiabatic expansion process by the expansion valve 5B.
  • the state of node N8 is included in the area of moist steam.
  • the refrigerant from the compressor 1 goes to the heat exchanger 8 without passing through the internal heat exchanger 7. Since heat exchange between the refrigerants is rarely performed in the internal heat exchanger 7, the state of the node N7 is almost the same as the state of the node N8.
  • a pressure loss due to the extension pipe ep1 occurs.
  • the state of node N6 is also included in the moist steam region as is the state of node N7. That is, even in the heating operation, the moist steam passes through the extension pipe ep1.
  • the process from the state of node N6 to the state of node N5 shows the cooling process in the internal heat exchanger 6.
  • the state of the node N5 is a state in which the enthalpy has moved from the state of the node N6 in a direction in which the enthalpy decreases, and is included in the liquid refrigerant region.
  • the liquid refrigerant in the state of the node N5 flows into the expansion valve 5A.
  • the process from the state of node N5 to the state of node N4 shows the adiabatic expansion process by the expansion valve 5A.
  • the process from the state of node N4 to the state of node N3 shows the evaporation process by the heat exchanger 4 that functions as an evaporator.
  • the process from the state of node N3 to the state of node N2 shows the heating process by the internal heat exchanger 6.
  • the state of the node N1 is almost the same as that of the node N2 because the state of the refrigerant flowing from the node N2 to the node N1 via the four-way valve 2 hardly changes.
  • FIG. 11 is a diagram showing the functional configuration of the air conditioner 200, which is an example of the refrigeration cycle device according to the second embodiment, and the flow of the refrigerant in the cooling operation.
  • the configuration of the air conditioner 200 is such that the internal heat exchangers 6 and 7 of FIG. 1 are replaced with a receiver 62 (first receiver) and a receiver 72 (second receiver) capable of storing the liquid refrigerant, respectively. Other than these, the same applies, so the description will not be repeated.
  • wet steam from the expansion valve 5A flows into the receiver 62.
  • the liquid refrigerant may flow out from the receiver 62. Since the liquid refrigerant has a higher density than the wet vapor, the amount of the liquid refrigerant stored in the receiver 62 decreases with the passage of time, and as a result, the refrigerant flowing out from the receiver 62 changes from the liquid refrigerant to the wet vapor.
  • the liquid refrigerant flows through the extension pipe ep1 temporarily, and after the refrigerant flowing out from the receiver 62 changes from the liquid refrigerant to the wet vapor, the wet vapor flows through the extension pipe ep1.
  • the refrigerant flowing into the receiver 72 from the extension pipe ep1 is cooled by the refrigerant from the heat exchanger 8 that functions as an evaporator.
  • the liquid refrigerant flows out from the receiver 72 and heads for the expansion valve 5B, and the excess refrigerant is stored in the receiver 72.
  • FIG. 12 is a diagram showing the functional configuration of the air conditioner 200 of FIG. 11 and the flow of the refrigerant in the heating operation.
  • wet steam from the expansion valve 5B flows into the receiver 72.
  • the liquid refrigerant may flow out from the receiver 72.
  • the amount of the liquid refrigerant stored in the receiver 72 decreases with the passage of time, and as a result, the refrigerant flowing out from the receiver 72 changes from the liquid refrigerant to moist vapor.
  • the liquid refrigerant flows through the extension pipe ep1 temporarily, and after the refrigerant flowing out from the receiver 72 changes from the liquid refrigerant to the wet vapor, the wet vapor flows through the extension pipe ep1.
  • the refrigerant flowing into the receiver 62 from the extension pipe ep1 is cooled by the refrigerant from the heat exchanger 4 that functions as an evaporator.
  • the liquid refrigerant flows out from the receiver 62 and heads for the expansion valve 5A, and the excess refrigerant is stored in the receiver 62.
  • the refrigeration cycle device including one outdoor unit and one indoor unit has been described.
  • the refrigeration cycle device according to the embodiment may be configured to include a plurality of indoor units, or may be configured to include a plurality of outdoor units.
  • the functions of the switching units 3 and 9 of FIGS. 1, 2, 11 and 12 are realized by two check valves.
  • the configuration of the switching unit of the refrigeration cycle device according to the embodiment is not limited to the configuration including two check valves.
  • an on-off valve controlled by a control device may be used instead of the check valve.
  • the function of the switching unit may be realized by a three-way valve.
  • FIG. 13 is a diagram showing the functional configuration of the air conditioner 200A, which is an example of the refrigeration cycle device according to the modified example of the second embodiment, and the flow of the refrigerant in the cooling operation.
  • the switching units 3 and 9 in FIG. 11 are replaced with the three-way valve 3A (first switching unit) and the three-way valve 9A (second switching unit), respectively, and the control device 10 is replaced with 10A. It is a configured configuration. Other than these, the same applies, so the description will not be repeated.
  • the three-way valve 3A has a port P31 (first port), a port P32 (second port), and a port P33 (third port).
  • the three-way valve 3A selectively switches the port communicating with the port P31 between the ports P32 and P33.
  • the receiver 62 is connected between the ports P32 and P33.
  • Port P31 is connected to the heat exchanger 4.
  • the three-way valve 9A has a port P91 (fourth port), a port P92 (fifth port), and a port P93 (sixth port).
  • the three-way valve 9A selectively switches the port communicating with the port P91 between the ports P92 and P93.
  • the receiver 72 is connected between ports P92 and P93.
  • Port P91 is connected to the heat exchanger 8.
  • the port P32 communicates with the discharge port of the compressor 1 via the four-way valve 2.
  • the control device 10A communicates the port P31 with the P32 and the port P91 with the P92.
  • the control device 10A controls the three-way valve 3A to guide the refrigerant from the compressor 1 to the heat exchanger 4 without passing through the receiver 62.
  • the control device 10A controls the three-way valve 9A to guide the refrigerant from the heat exchanger 8 to the compressor 1 via the receiver 72.
  • FIG. 14 is a diagram showing the functional configuration of the air conditioner 200A of FIG. 13 and the flow of the refrigerant in the heating operation.
  • the port P32 communicates with the suction port of the compressor 1 via the four-way valve 2.
  • the control device 10A communicates the port P31 with the P33 and the port P91 with the P93.
  • the control device 10A controls the three-way valve 9A to guide the refrigerant from the compressor 1 to the heat exchanger 8 without passing through the receiver 72.
  • the control device 10A controls the three-way valve 3A to guide the refrigerant from the heat exchanger 4 to the compressor 1 via the receiver 62.
  • the decrease in controllability can be suppressed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

Dans l'appareil à cycle frigorifique (100) de la présente invention, la direction de circulation d'un fluide frigorigène est commutée entre une première direction de circulation et une seconde direction de circulation inverse à la première direction de circulation. L'appareil à cycle frigorifique (100) est pourvu d'un compresseur (1), d'un premier échangeur de chaleur (4), d'un deuxième échangeur de chaleur (8), d'un troisième échangeur de chaleur (6), d'un quatrième échangeur de chaleur (7), d'un premier détendeur (5A) et d'un second détendeur (5B). La première direction de circulation est une direction dans laquelle une circulation est effectuée dans l'ordre suivant: compresseur (1), premier échangeur de chaleur (4), premier détendeur (5A), troisième échangeur de chaleur (6), quatrième échangeur de chaleur (7), deuxième détendeur (5B) et deuxième échangeur de chaleur (8). Lorsque le fluide frigorigène est mis en circulation dans la première direction de circulation, le fluide frigorigène provenant du troisième échangeur de chaleur (6) échange de la chaleur avec le fluide frigorigène provenant du second échangeur de chaleur (8) dans le quatrième échangeur de chaleur (7). Lorsque le fluide frigorigène est mis en circulation dans la seconde direction de circulation, le fluide frigorigène provenant du quatrième échangeur de chaleur (7) échange de la chaleur avec le fluide frigorigène provenant du premier échangeur de chaleur (4) dans le troisième échangeur de chaleur (6).
PCT/JP2019/015142 2019-04-05 2019-04-05 Appareil à cycle frigorifique WO2020202553A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201980094987.9A CN113646593B (zh) 2019-04-05 2019-04-05 制冷循环装置
JP2021511055A JPWO2020202553A1 (fr) 2019-04-05 2019-04-05
PCT/JP2019/015142 WO2020202553A1 (fr) 2019-04-05 2019-04-05 Appareil à cycle frigorifique
US17/432,543 US20220136741A1 (en) 2019-04-05 2019-04-05 Refrigeration cycle apparatus
EP19923242.2A EP3951284A4 (fr) 2019-04-05 2019-04-05 Appareil à cycle frigorifique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/015142 WO2020202553A1 (fr) 2019-04-05 2019-04-05 Appareil à cycle frigorifique

Publications (1)

Publication Number Publication Date
WO2020202553A1 true WO2020202553A1 (fr) 2020-10-08

Family

ID=72667324

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/015142 WO2020202553A1 (fr) 2019-04-05 2019-04-05 Appareil à cycle frigorifique

Country Status (5)

Country Link
US (1) US20220136741A1 (fr)
EP (1) EP3951284A4 (fr)
JP (1) JPWO2020202553A1 (fr)
CN (1) CN113646593B (fr)
WO (1) WO2020202553A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022185427A1 (fr) * 2021-03-03 2022-09-09 三菱電機株式会社 Dispositif à cycle réfrigeration
WO2024079852A1 (fr) * 2022-10-13 2024-04-18 三菱電機株式会社 Dispositif à cycle frigorifique

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058145B2 (ja) 1982-12-03 1985-12-18 株式会社東芝 カ−ド集積装置
JPH03271659A (ja) * 1990-03-19 1991-12-03 Matsushita Refrig Co Ltd 多室型空気調和機
JPH09152195A (ja) * 1995-11-28 1997-06-10 Sanyo Electric Co Ltd 冷凍装置
JPH10332212A (ja) * 1997-06-02 1998-12-15 Toshiba Corp 空気調和装置の冷凍サイクル
JP2001235239A (ja) * 2000-02-23 2001-08-31 Seiko Seiki Co Ltd 超臨界蒸気圧縮サイクル装置
JP2009162388A (ja) * 2007-12-28 2009-07-23 Mitsubishi Electric Corp 冷凍空調装置、冷凍空調装置の室外機および冷凍空調装置の制御装置
JP2012112622A (ja) * 2010-11-26 2012-06-14 Mitsubishi Electric Corp 二元冷凍装置
JP2016020760A (ja) * 2014-07-14 2016-02-04 株式会社富士通ゼネラル 空気調和装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3242217B2 (ja) * 1993-07-09 2001-12-25 東芝キヤリア株式会社 空気調和機
CN1171050C (zh) * 1999-09-24 2004-10-13 三洋电机株式会社 多级压缩制冷装置
JP4459776B2 (ja) * 2004-10-18 2010-04-28 三菱電機株式会社 ヒートポンプ装置及びヒートポンプ装置の室外機
JP3982545B2 (ja) * 2005-09-22 2007-09-26 ダイキン工業株式会社 空気調和装置
JP2009180406A (ja) * 2008-01-30 2009-08-13 Calsonic Kansei Corp 超臨界冷凍サイクル
WO2013160929A1 (fr) * 2012-04-23 2013-10-31 三菱電機株式会社 Système à cycle frigorifique
WO2015029160A1 (fr) * 2013-08-28 2015-03-05 三菱電機株式会社 Climatiseur
JP6017048B2 (ja) * 2013-08-30 2016-10-26 三菱電機株式会社 空気調和装置
CN108332285B (zh) * 2017-12-29 2019-12-06 青岛海尔空调器有限总公司 空调器系统

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6058145B2 (ja) 1982-12-03 1985-12-18 株式会社東芝 カ−ド集積装置
JPH03271659A (ja) * 1990-03-19 1991-12-03 Matsushita Refrig Co Ltd 多室型空気調和機
JPH09152195A (ja) * 1995-11-28 1997-06-10 Sanyo Electric Co Ltd 冷凍装置
JPH10332212A (ja) * 1997-06-02 1998-12-15 Toshiba Corp 空気調和装置の冷凍サイクル
JP2001235239A (ja) * 2000-02-23 2001-08-31 Seiko Seiki Co Ltd 超臨界蒸気圧縮サイクル装置
JP2009162388A (ja) * 2007-12-28 2009-07-23 Mitsubishi Electric Corp 冷凍空調装置、冷凍空調装置の室外機および冷凍空調装置の制御装置
JP2012112622A (ja) * 2010-11-26 2012-06-14 Mitsubishi Electric Corp 二元冷凍装置
JP2016020760A (ja) * 2014-07-14 2016-02-04 株式会社富士通ゼネラル 空気調和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3951284A4

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022185427A1 (fr) * 2021-03-03 2022-09-09 三菱電機株式会社 Dispositif à cycle réfrigeration
JP7422935B2 (ja) 2021-03-03 2024-01-26 三菱電機株式会社 冷凍サイクル装置
WO2024079852A1 (fr) * 2022-10-13 2024-04-18 三菱電機株式会社 Dispositif à cycle frigorifique

Also Published As

Publication number Publication date
CN113646593A (zh) 2021-11-12
US20220136741A1 (en) 2022-05-05
EP3951284A4 (fr) 2022-04-06
EP3951284A1 (fr) 2022-02-09
JPWO2020202553A1 (fr) 2020-10-08
CN113646593B (zh) 2022-11-15

Similar Documents

Publication Publication Date Title
JP6351848B2 (ja) 冷凍サイクル装置
KR101355689B1 (ko) 공기 조화 장치 및 그 어큐뮬레이터
JP4752765B2 (ja) 空気調和装置
WO2018123361A1 (fr) Dispositif de commande de climatiseur à blocs multiples, climatiseur à blocs multiples, procédé et programme de commande de climatiseur à blocs multiples
JP5518102B2 (ja) 空調給湯複合システム
WO2012081052A1 (fr) Système combiné de climatisation et de distribution d'eau chaude
JP4462435B2 (ja) 冷凍装置
WO2020202553A1 (fr) Appareil à cycle frigorifique
WO2018078810A1 (fr) Climatiseur
CN111164355B (zh) 空调装置
JP6341326B2 (ja) 冷凍装置の熱源ユニット
WO2020208776A1 (fr) Climatiseur
KR101450543B1 (ko) 공기조화 시스템
JP2008039233A (ja) 冷凍装置
JP6577264B2 (ja) 空調調和機
US20210063042A1 (en) Air conditioner and control method thereof
JP6723375B2 (ja) 冷凍サイクル装置
JP7067318B2 (ja) 空気調和機
JP6272364B2 (ja) 冷凍サイクル装置
KR101692243B1 (ko) 캐스캐이드 사이클을 이용한 히트 펌프
KR102482403B1 (ko) 공기 조화 시스템
JP6964776B2 (ja) 冷凍サイクル装置
JP2010014386A (ja) 冷凍装置
JP7438363B2 (ja) 冷熱源ユニットおよび冷凍サイクル装置
WO2024047954A1 (fr) Appareil à cycle de réfrigération et climatiseur

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19923242

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2021511055

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2019923242

Country of ref document: EP

Effective date: 20211105