WO2023166558A1 - Air conditioning device - Google Patents

Air conditioning device Download PDF

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Publication number
WO2023166558A1
WO2023166558A1 PCT/JP2022/008598 JP2022008598W WO2023166558A1 WO 2023166558 A1 WO2023166558 A1 WO 2023166558A1 JP 2022008598 W JP2022008598 W JP 2022008598W WO 2023166558 A1 WO2023166558 A1 WO 2023166558A1
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WO
WIPO (PCT)
Prior art keywords
heat source
refrigerant
heat exchanger
heat
source side
Prior art date
Application number
PCT/JP2022/008598
Other languages
French (fr)
Japanese (ja)
Inventor
和也 本田
直史 竹中
誠司 羽下
健史 森山
麻子 田村
優広 玉木
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 PCT/JP2022/008598 priority Critical patent/WO2023166558A1/en
Publication of WO2023166558A1 publication Critical patent/WO2023166558A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • 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

Definitions

  • the present disclosure relates to an air conditioner that achieves both cooling operation and heating operation.
  • Patent Document 1 In the technology described in Patent Document 1, the control unit adjusts the amount of air blown by controlling the on/off of the fan. However, since the control unit is a component that generates heat, Patent Document 1 does not consider cooling of the control unit. Therefore, there is a demand for a technology that can simultaneously perform the cooling operation and the heating operation while suppressing the temperature rise of the control unit.
  • the present disclosure has been made in view of the above circumstances, and provides an air conditioner that can perform cooling operation and heating operation at the same time while suppressing the temperature rise of the control unit.
  • An air conditioner includes a heat source side unit provided with a heat source side heat exchanger, a plurality of load side units provided with a load side heat exchanger, and the heat source side unit and the heat source side unit are connected by piping, a relay unit that distributes the heat of the refrigerant supplied from the heat source side unit to the load side unit, and the heat source side unit includes a control section that controls the operation of the heat source side unit; and the heat source side heat exchanger.
  • the control unit operates the first fan and operates or stops the second fan at a rotational speed lower than that of the first fan.
  • the first fan is arranged at a position where it can blow air to the control unit with priority over the second fan.
  • the control unit operates the first fan and operates the second fan as the first fan. Operate or stop at a speed lower than that of the fan. Therefore, the first fan preferentially blows air to the controller of the heat source side unit, so that the air conditioner can be maintained in the cooling main operation mode while suppressing the temperature rise of the controller.
  • FIG. 1 is a circuit diagram showing an air conditioner according to Embodiment 1.
  • FIG. 4 is a diagram showing the heat source side heat exchanger, the first outdoor fan, and the second outdoor fan according to Embodiment 1, when the heat source side heat exchanger operates as a condenser;
  • FIG. 1 is a diagram showing the appearance of a compressor according to Embodiment 1.
  • FIG. 4(a) is a plan view showing the internal structure of the compressor according to Embodiment 1.
  • FIG. FIG. 4(b) is a diagram showing the arrangement configuration of the control unit of the compressor, the heat source side heat exchanger, the first outdoor fan, and the second outdoor fan according to the first embodiment.
  • FIG. 4 is a diagram showing the heat source side heat exchanger, the first outdoor fan, and the second outdoor fan according to the first embodiment.
  • FIG. 2 is a diagram illustrating an example of a flow of refrigerant in a cooling-main operation mode of the air conditioner illustrated in FIG. 1;
  • FIG. 7 is a diagram schematically illustrating an example of a circuit configuration of an air conditioner according to Embodiment 2;
  • FIG. 7 is a diagram illustrating an example of a flow of refrigerant in a cooling main operation mode of the air conditioner illustrated in FIG. 6;
  • FIG. 11 is a diagram schematically illustrating an example of a circuit configuration of an air conditioner according to Embodiment 3;
  • FIG. 9 is a diagram illustrating an example of a flow of refrigerant in a cooling main operation mode of the air conditioner shown in FIG. 8;
  • FIG. 8 is a diagram illustrating an example of a flow of refrigerant in a cooling main operation mode of the air conditioner shown in FIG. 8;
  • FIG. 8 is a diagram illustrating an example of a flow of refrigerant in a cooling main operation mode of the air conditioner shown in
  • FIG. 10 is a diagram schematically illustrating an example of a circuit configuration of an air conditioner 100 according to Embodiment 4;
  • FIG. 11 is a diagram illustrating an example of a refrigerant flow during a cooling main operation mode of the air conditioner illustrated in FIG. 10;
  • FIG. 1 is a circuit diagram showing an air conditioner 100 according to Embodiment 1.
  • the air conditioner 100 includes a heat source device 10 as a heat source side unit, a load side unit 80a and a load side unit 80b, and a repeater 50 as a relay unit.
  • the relay unit includes both distribution of the refrigerant itself and distribution of heat transferred from the refrigerant to the heat transfer medium.
  • two load-side units 80a and 80b are connected to one heat source device 10, but the number of heat source devices 10 may be two or more. Also, the number of load side units 80 may be three or more.
  • the air conditioner 100 is configured by connecting a heat source device 10, a load side unit 80a and a load side unit 80b, and a repeater 50.
  • the heat source device 10 has a function of supplying heat or cold to the two load-side units 80a and 80b.
  • the two load-side units 80 a and 80 b have the function of cooling or heating the load-side space with the heat or cold heat supplied from the heat source device 10 .
  • the relay device 50 switches the flow of the refrigerant supplied from the heat source device 10 between the heat source device 10 and the load side unit 80a and the load side unit 80b in accordance with requests from the load side unit 80a and the load side unit 80b. have a function.
  • the heat source device 10 and the relay device 50 are connected by a high-pressure pipe 42 through which a high-pressure refrigerant flows and a low-pressure pipe 41 through which a low-pressure refrigerant flows.
  • the heat source device 10 is arranged, for example, outside the room, and exhausts or supplies heat from air conditioning.
  • the heat source device 10 includes, for example, a compressor 1, a four-way valve 2a, a heat source side heat exchanger 3, an expansion device 5, and an accumulator 6, which are connected by pipes.
  • the heat source device 10 is also equipped with a first outdoor fan 4a and a second outdoor fan 4b, which are blowers for blowing air to the heat source side heat exchanger 3 .
  • the case where two first outdoor fans 4a and second outdoor fans 4b are mounted is illustrated, but the number of first outdoor fans 4a and second outdoor fans 4b can be three or more. good.
  • the compressor 1 takes in and compresses the refrigerant to bring it into a high temperature and high pressure state, and is composed of, for example, an inverter compressor whose capacity can be controlled.
  • the compressor 1 may have, for example, a low-pressure shell structure that has a compression chamber in a closed container, the inside of the closed container becomes a low-pressure refrigerant pressure atmosphere, and the low-pressure refrigerant in the closed container is sucked and compressed.
  • the compressor 1 may have a high-pressure shell structure in which the inside of the sealed container becomes a high-pressure refrigerant pressure atmosphere, and the low-pressure refrigerant in a pipe connected to the suction portion of the compressor is sucked and compressed.
  • the four-way valve 2a switches between the refrigerant flow path in cooling operation and the refrigerant flow path in heating operation, and switches the heat source side heat exchanger 3 acting as a condenser or gas cooler.
  • the discharge side of the compressor 1, the heat source side heat exchanger 3, the first check valve 7, the third check valve 9 and the accumulator 6 are connected via the four-way valve 2a.
  • the four-way valve 2a switches the refrigerant circuit so that the discharge side of the compressor 1 communicates with the heat source side heat exchanger 3, the first check valve 7, and the accumulator 6, so that the heat source side heat is
  • the exchanger 3 operates to act as a condenser or gas cooler.
  • the four-way valve 2a switches the refrigerant circuit so that the discharge side of the compressor 1 communicates with the third check valve 9, the fourth check valve 11, the heat source side heat exchanger 3, and the accumulator 6, respectively.
  • the heat source side heat exchanger 3 operates as an evaporator.
  • the four-way valve 2a is a four-way valve or the like, and may be a two-way valve or the like.
  • the accumulator 6 is provided at the suction part on the suction side of the compressor 1, and the surplus refrigerant generated due to the difference between the heating operation mode and the cooling operation mode, or the surplus refrigerant generated due to a transitional change in operation. is stored.
  • a receiver for storing high-pressure liquid refrigerant may be used.
  • the heat source equipment 10 has a first check valve 7 , a second check valve 8 , a third check valve 9 and a fourth check valve 11 .
  • the first check valve 7 is arranged in a pipe connecting the low-pressure pipe 41 and the four-way valve 2a so that the refrigerant flows from the low-pressure pipe 41 to the four-way valve 2a.
  • the second check valve 8 is arranged in a pipe connecting the high-pressure pipe 42 and the expansion device 5 so that the refrigerant flows from the expansion device 5 to the high-pressure pipe 42 .
  • the third check valve 9 is connected between the pipe connecting the four-way valve 2 a and the high pressure pipe 42 , and arranged so that the refrigerant flows from the heat source device 10 to the high pressure pipe 42 .
  • the fourth check valve 11 is arranged in a pipe connecting the low-pressure pipe 41 and the expansion device 5 so that the refrigerant flows from the low-pressure pipe 41 to the heat source device 10 .
  • the compressor 1 detects the liquid side temperature of the heat source side heat exchanger 3 with a high pressure detection sensor 31, a discharge temperature sensor 21, an intake temperature sensor 22, a low pressure detection sensor 32, an outside temperature sensor 23, and a heat source side heat exchanger 3. and a temperature sensor 24 .
  • the high pressure detection sensor 31 detects the high pressure on the discharge side of the compressor 1 .
  • the discharge temperature sensor 21 detects the temperature of the high-temperature and high-pressure refrigerant discharged from the compressor 1 .
  • the intake temperature sensor 22 detects the temperature of the low-temperature and low-pressure refrigerant sucked into the compressor 1 .
  • the low pressure detection sensor 32 detects the low pressure of refrigerant on the suction side of the compressor 1 .
  • the outside air temperature sensor 23 is provided at the air intake portion of the heat source side heat exchanger 3 and detects the ambient temperature of the compressor 1 .
  • the volume of the heat source side heat exchanger 3 is the volume of the pipe or container through which the refrigerant flows among the compressor 1, the load side units 80a and 80b, and the relay 50, and the volume of the compressor 1 and the relay. It occupies 15% to 30% of the total of the volume of the pipe connecting the repeater 50 and the volume of the pipe connecting the repeater 50 and the load-side unit 80a and the load-side unit 80b.
  • the control unit 60 controls, for example, the entire air conditioner 100, and includes, for example, an analog circuit, a digital circuit, a CPU, or a combination of two or more of these.
  • the control unit 60 controls the driving frequency of the compressor 1 and the rotation of the first outdoor fan 4a and the second outdoor fan 4b based on detection information detected by the various sensors described above and instructions from an input device such as a remote controller. number (including ON/OFF switching), switching of the four-way valve 2a, opening degree of the expansion device 5, drive frequency of the pump (not shown), opening degree of the indoor expansion device 53a and the indoor expansion device 53b, Each operation mode, which will be described later, is executed.
  • the temperature of the control unit 60 rises due to the heat generated by the control unit 60 and the heat radiation from the heat source device 10 .
  • the temperature range within which CPUs and microprocessors operate normally is determined.
  • the control unit 60 is arranged at a position where it can be cooled by air blowing from the first outdoor fan 4a.
  • the heat source device 10 also has a temperature sensor 26 that detects the temperature of the control section 60 .
  • the processing circuit of the control unit 60 is dedicated hardware
  • the processing circuit is, for example, a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. is applicable.
  • Each functional unit implemented by the processing circuit may be implemented by separate hardware, or each functional unit may be implemented by one piece of hardware.
  • the processing circuit of the control unit 60 is a CPU
  • each function executed by the processing circuit is implemented by software, firmware, or a combination of software and firmware.
  • Software and firmware are written as programs and stored in the storage unit.
  • the CPU implements each function of the processing circuit by reading and executing a program stored in the storage unit.
  • a part of the functions of the processing circuit may be realized by dedicated hardware, and a part thereof may be realized by software or firmware.
  • the load-side unit 80a is, for example, arranged inside a room and supplies conditioned air to the room.
  • the load side unit 80a has a load side heat exchanger 51a that operates as an evaporator or condenser.
  • the load-side unit 80b is, for example, arranged inside a room and supplies conditioned air to the room.
  • the load side unit 80b has a load side heat exchanger 51b that operates as an evaporator or condenser.
  • the load-side heat exchanger 51a and the load-side heat exchanger 51b are connected to the repeater 50 via piping.
  • the load-side heat exchanger 51a and the load-side heat exchanger 51b exchange heat between air and refrigerant to generate heating air or cooling air to be supplied to the indoor space.
  • Indoor air is blown to the load-side heat exchanger 51a by an indoor fan 52a.
  • Indoor air is blown to the load-side heat exchanger 51b by an indoor fan 52b.
  • the indoor expansion device 53a and the indoor expansion device 53b are composed of a two-way valve or the like that can control the opening area.
  • the indoor expansion device 53a adjusts the flow rate of the heat medium flowing through the load side heat exchanger 51a.
  • the indoor throttle device 53b adjusts the flow rate of the heat medium flowing through the load-side heat exchanger 51b.
  • One side of the indoor expansion device 53a is connected to the load side heat exchanger 51a, and the other side is connected to the pipe connecting to the repeater 50.
  • the indoor expansion device 53a is provided on the liquid refrigerant side of the heat medium flow path of the load side heat exchanger 51a.
  • One side of the indoor expansion device 53b is connected to the load side heat exchanger 51b, and the other side is connected to the pipe connecting to the repeater 50.
  • the indoor expansion device 53b is provided on the liquid refrigerant side of the heat medium flow path of the load side heat exchanger 51b.
  • the load side unit 80a also has an indoor heat exchange gas temperature sensor 54a and an indoor heat exchange liquid temperature sensor 56a.
  • the load side unit 80b has an indoor heat exchange gas temperature sensor 54b and an indoor heat exchange liquid temperature sensor 56b.
  • the indoor heat exchanger gas temperature sensor 54a and the indoor heat exchanger gas temperature sensor 54b are composed of, for example, thermistors.
  • the indoor heat exchanger gas temperature sensor 54a detects the gas temperature of the refrigerant flowing into or out of the load side heat exchanger 51a.
  • the indoor heat exchanger gas temperature sensor 54b detects the gas temperature of the refrigerant flowing into or out of the load side heat exchanger 51b.
  • the indoor heat exchanger gas temperature sensor 54a is provided in the gas pipe of the load side heat exchanger 51a.
  • the indoor heat exchanger gas temperature sensor 54b is provided in the gas pipe of the load side heat exchanger 51b.
  • the indoor heat exchange fluid temperature sensor 56a and the indoor heat exchange fluid temperature sensor 56b are composed of, for example, thermistors.
  • the indoor heat exchange liquid temperature sensor 56a detects the temperature of the liquid refrigerant flowing into or out of the load side heat exchanger 51a.
  • the indoor heat exchange liquid temperature sensor 56b detects the temperature of the liquid refrigerant flowing into or out of the load side heat exchanger 51b.
  • the indoor heat exchange fluid temperature sensor 56a is provided on the heat medium outlet side of the load side heat exchanger 51a.
  • the indoor heat exchange fluid temperature sensor 56b is provided on the heat medium outlet side of the load side heat exchanger 51b.
  • the repeater 50 is arranged, for example, in a non-air-conditioned space in a building separate from the load-side unit 80a and the load-side unit 80b.
  • the relay 50 includes a gas-liquid separation mechanism 12, a first heat exchanger between refrigerants 13, a second heat exchanger between refrigerants 14, a first relay throttle device 15, a second relay throttle device 16, have
  • the repeater 50 has a first on-off valve 19a and a second on-off valve 20a that are connected to the gas-side pipe of the load-side heat exchanger 51a.
  • the repeater 50 has a first on-off valve 19b and a second on-off valve 20b that are connected to the gas-side pipe of the load-side heat exchanger 51b.
  • the first on-off valve 19a and the first on-off valve 19b are connected to the gas side outlet of the gas-liquid separation mechanism 12, and the second on-off valve 20a and the second on-off valve 20b are pipes connecting the repeater 50 and the high-pressure pipe 42. connected to
  • the first on-off valve 19a and the first on-off valve 19b, and the second on-off valve 20a and the second on-off valve 20b are, for example, two-way valves.
  • the repeater 50 has a first repeater check valve 17a and a first repeater check valve 17b, and a second repeater check valve 18a and a second repeater check valve 18b.
  • the first relay check valve 17a is arranged in the pipe connecting the relay 50 and the load side unit 80a, and arranged so that the refrigerant flows from the relay 50 to the indoor expansion device 53a.
  • the first relay check valve 17b is arranged in a pipe connecting the relay 50 and the load side unit 80b, and arranged so that the refrigerant flows from the relay 50 to the indoor expansion device 53b.
  • the second relay check valve 18a is arranged in the pipe connecting the relay 50 and the load side unit 80a, and arranged so that the refrigerant flows from the indoor expansion device 53a to the relay 50.
  • the second relay check valve 18b is arranged in the pipe that connects the relay 50 and the load side unit 80b, and is arranged so that the refrigerant flows from the indoor expansion device 53b to the relay 50.
  • the repeater 50 is provided with a high pressure side liquid pressure sensor 33 , a liquid outflow pressure sensor 34 and a repeater temperature sensor 25 .
  • the high pressure side liquid pressure sensor 33 is provided between the first heat exchanger between refrigerants 13 and the first relay throttle device 15 .
  • the liquid outflow pressure sensor 34 is provided between the first relay throttle device 15 and the second refrigerant heat exchanger 14 .
  • the repeater temperature sensor 25 is arranged in a pipe connecting the low-pressure side outlet of the first heat exchanger between refrigerants 13 and the high-pressure pipe 42 .
  • FIG. 2 shows the heat source side heat exchanger 3, the first outdoor fan 4a and the second outdoor fan 4b according to Embodiment 1, and is a diagram when the heat source side heat exchanger 3 operates as a condenser.
  • the heat source side heat exchanger 3 is composed of multiple pipes through which refrigerant flows and fins for enlarging the heat transfer area.
  • black arrows indicate the flow of refrigerant
  • white arrows indicate the flow of air.
  • the refrigerant flows into the heat source side heat exchanger 3 from the left side of the page, flows in the depth direction of the page, turns back to the front of the page, and then flows out to the right side of the page.
  • the heat source side heat exchanger 3 operates as a condenser
  • the first outdoor fan 4a and the second outdoor fan 4a and the second outdoor fan 4a are arranged so that the air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the refrigerant flow countercurrently.
  • a fan 4b is arranged.
  • FIG. 3 is a diagram showing the appearance of the heat source equipment 10 according to the first embodiment.
  • the heat source machine 10 is configured as a so-called trunk-type heat source machine, and has a front wall 10a, a rear wall 10b, a left wall 10c, a right wall 10d, a ceiling wall 10e, and a bottom plate 10f. It has a rectangular parallelepiped shape.
  • An air outlet 103a of the first outdoor fan 4a is formed above the left portion of the front wall 10a.
  • An outlet 103b of the second outdoor fan 4b is formed below the left portion of the front wall 10a.
  • the right side wall 10d is formed with a suction port 10g through which outside air can be sucked into the heat source device 10. As shown in FIG.
  • FIG. 4(a) is a plan view showing the internal structure of the heat source equipment 10 according to Embodiment 1.
  • FIG. 4A shows the heat source side heat exchanger 3, the first outdoor fan 4a, the controller 60, and the radiator plate 61 of the controller 60 in the configuration of the heat source device 10.
  • FIG. 4(b) is a diagram showing the arrangement configuration of the control unit 60, the heat source side heat exchanger 3, the first outdoor fan 4a, and the second outdoor fan 4b of the heat source device 10 according to the first embodiment.
  • the heat source device 10 is partitioned by a partition plate 10h.
  • the heat source side heat exchanger 3, the first outdoor fan 4a and the second outdoor fan 4b are arranged on the left side of the partition plate 10h in FIG. 4(a), and other components are arranged on the right side of the partition plate 10h. ing.
  • the control unit 60 is housed in, for example, a rectangular parallelepiped electrical component box, and is arranged on the upper right side wall 10d inside the heat source device 10. As shown in FIG. The controller 60 housed in the electrical component box is simply called the controller 60 . Further, the control unit 60 is arranged between the first outdoor fan 4a and the heat source side heat exchanger 3 and at approximately the same height as the first outdoor fan 4a. Since the distance between the first outdoor fan 4a and the control unit 60 is shorter than the distance between the second outdoor fan 4b and the control unit 60, the control unit 60 operates not the second outdoor fan 4b, but mainly It is cooled by wind from the first outdoor fan 4a.
  • the radiator plate 61 is a cooling device that is arranged so as to be in contact with the controller 60 and dissipates heat generated from the controller 60 .
  • the radiator plate 61 is composed of, for example, fins like a heat sink.
  • the heat source device 10 has an air outlet 10i for supplying air from the air inlet 10g (see FIG. 3) to the radiator plate 61 by the first outdoor fan 4a.
  • the control unit 60 is cooled by supplying the air sucked from the suction port 10g (see FIG. 3) to the radiator plate 61, and the air heated by the radiator plate 61 flows through the heat source side heat exchanger 3 from the blowout port 10i. It is discharged with the passing air.
  • the air conditioner 100 performs cooling-only operation, heating-only operation, cooling-main operation, and heating-main operation based on instructions from the load-side unit 80a and the load-side unit 80b.
  • the cooling only operation is a mode in which both the load-side unit 80a and the load-side unit 80b perform the cooling operation mode.
  • the heating only operation is a mode in which both the load side unit 80a and the load side unit 80b perform the heating operation mode.
  • the cooling-dominant operation is an operation mode in which the load-side unit 80a and the load-side unit 80b are in a simultaneous cooling/heating operation mode in which the cooling operation and the heating operation are mixed, and the cooling load is larger.
  • the heating-dominant operation is an operation mode in which the heating load is larger among the simultaneous cooling and heating operation modes.
  • the compressor 1 takes in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 via the four-way valve 2a.
  • the heat source side heat exchanger 3 exchanges heat between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the high-temperature and high-pressure gas refrigerant.
  • the medium-temperature and high-pressure refrigerant cooled in the heat source side heat exchanger 3 flows through the expansion device 5 and the second check valve 8 into the high-pressure pipe 42 .
  • the medium-temperature and high-pressure refrigerant flows into the repeater 50 through the high-pressure pipe 42, and passes through the gas-liquid separation mechanism 12, the first refrigerant heat exchanger 13, the first repeater throttle device 15, and the second refrigerant heat exchanger. 14, it flows into the first relay check valve 17a and the first relay check valve 17b.
  • the low-temperature and low-pressure refrigerant decompressed by the second relay throttle device 16 flows into the second heat exchanger between refrigerants 14 and the first heat exchanger between refrigerants 13, and exchanges heat with medium-temperature and high-pressure liquid refrigerant. , gasifies and flows out.
  • the medium-temperature and high-pressure liquid refrigerant cooled by the first heat exchanger between refrigerants 13 and the second heat exchanger between refrigerants 14 passes through the first relay check valve 17a and the first relay check valve 17b. It flows into the load side unit 80a and the load side unit 80b.
  • the low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a.
  • the low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53b flows into the load-side heat exchanger 51b.
  • the load-side heat exchanger 51a heat is exchanged between the indoor air supplied from the indoor fan 52a and the low-temperature refrigerant.
  • the medium-temperature refrigerant heated by the load-side heat exchanger 51a passes through the relay device 50 and flows into the low-pressure pipe 41 via the second on-off valve 20a.
  • the load-side heat exchanger 51b heat is exchanged between the indoor air supplied from the indoor fan 52b and the low-temperature refrigerant.
  • the medium-temperature refrigerant heated by the load-side heat exchanger 51b passes through the relay device 50 and flows into the low-pressure pipe 41 via the second on-off valve 20b.
  • the low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 is sucked into the compressor 1 again via the first check valve 7, the four-way valve 2a, and the accumulator 6.
  • the first outdoor fan 4a and the second outdoor fan 4b control the number of rotations so that the pressure detected by the high pressure detection sensor 31 is kept above a certain value. Further, when the temperature detected by the temperature sensor 26 exceeds a certain value, the controller 60 may increase the speed of the first outdoor fan 4a to cool the controller 60 preferentially.
  • Heating operation mode A heating operation mode in which the load-side unit 80a and the load-side unit 80b perform heating will be described.
  • the compressor 1 takes in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the high-pressure pipe 42 via the four-way valve 2 a and the third check valve 9 .
  • the high-pressure gas refrigerant that has flowed into the repeater 50 from the high-pressure pipe 42 flows into the load-side heat exchanger 51a via the gas-liquid separation mechanism 12 and the first on-off valve 19a.
  • the high-pressure gas refrigerant that has flowed into the repeater 50 from the high-pressure pipe 42 flows into the load-side heat exchanger 51b via the gas-liquid separation mechanism 12 and the first on-off valve 19b.
  • the load side unit 80a and the load side unit 80b are performing heating operation.
  • the load-side heat exchanger 51a heat is exchanged between the indoor air supplied from the indoor fan 52a and the high-temperature, high-pressure refrigerant.
  • the load-side heat exchanger 51b heat is exchanged between the indoor air supplied from the indoor fan 52b and the high-temperature, high-pressure refrigerant.
  • the medium-temperature refrigerant cooled by the load-side heat exchanger 51a flows into the repeater 50 from the second repeater check valve 18a via the indoor expansion device 53a.
  • the medium-temperature refrigerant cooled by the load-side heat exchanger 51b flows into the repeater 50 from the second repeater check valve 18b via the indoor expansion device 53b.
  • the medium-temperature refrigerant flows into the low-pressure pipe 41 via the second relay throttle device 16, the second heat exchanger between refrigerants 14, and the first heat exchanger between refrigerants 13.
  • the low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 flows into the heat source side heat exchanger 3 via the fourth check valve 11 and the expansion device 5 .
  • heat is exchanged between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the low-temperature, low-pressure refrigerant.
  • the low-temperature refrigerant heated by the heat source side heat exchanger 3 is sucked again into the compressor 1 via the four-way valve 2 a and the accumulator 6 .
  • Heating main operation mode A heating-dominant operation mode in which the load-side heat exchanger 51a and the load-side heat exchanger 51b generate a cooling load and a heating load will be described.
  • the load-side unit 80a performs cooling operation
  • the load-side unit 80b performs heating operation
  • the compressor 1 takes in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the high-pressure pipe 42 via the four-way valve 2 a and the third check valve 9 .
  • the high-pressure gas refrigerant that has flowed into the repeater 50 from the high-pressure pipe 42 flows into the load-side heat exchanger 51b via the gas-liquid separation mechanism 12 and the first on-off valve 19b.
  • the load-side heat exchanger 51b heat is exchanged between the indoor air supplied from the indoor fan 52b and the high-temperature, high-pressure refrigerant.
  • the medium-temperature refrigerant cooled by the load-side heat exchanger 51b flows from the second relay check valve 18b into the first relay check valve 17a via the indoor expansion device 53b.
  • the refrigerant flows into the load side unit 80a via the first relay check valve 17a.
  • the low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a.
  • the load-side heat exchanger 51a heat is exchanged between the indoor air supplied from the indoor fan 52a and the low-temperature refrigerant.
  • the medium-temperature refrigerant heated by the load-side heat exchanger 51a passes through the relay device 50 and flows into the low-pressure pipe 41 via the second on-off valve 20a.
  • heat is exchanged between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the low-temperature, low-pressure refrigerant.
  • the low-temperature refrigerant heated by the heat source side heat exchanger 3 is sucked again into the compressor 1 via the four-way valve 2 a and the accumulator 6 .
  • FIG. 5 is a diagram illustrating an example of the refrigerant flow in the cooling main operation mode of the air conditioner 100 shown in FIG.
  • the cooling-dominant operation mode in which the load-side heat exchanger 3a and the load-side heat exchanger 3b generate a cooling load and a heating load will be described.
  • the flow direction of the refrigerant is indicated by solid arrows.
  • the load-side unit 80a performs cooling operation and the load-side unit 80b performs heating operation will be described.
  • the compressor 1 takes in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 via the four-way valve 2a.
  • the heat source side heat exchanger 3 exchanges heat between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the high-temperature and high-pressure gas refrigerant.
  • the medium-temperature and high-pressure refrigerant cooled in the heat source side heat exchanger 3 flows through the expansion device 5 and the second check valve 8 into the high-pressure pipe 42 .
  • Medium-temperature and high-pressure refrigerant flows into the repeater 50 through the high-pressure pipe 42, and into the load-side heat exchanger 51b through the gas-liquid separation mechanism 12 and the first on-off valve 19b.
  • the load-side heat exchanger 51b heat is exchanged between the indoor air supplied from the indoor fan 52b and the high-temperature, high-pressure refrigerant.
  • the medium-temperature refrigerant cooled by the load-side heat exchanger 51b flows from the second relay check valve 18b into the first relay check valve 17a via the indoor expansion device 53b. It flows into the load side unit 80a via the first relay check valve 17a.
  • the low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a.
  • the load-side heat exchanger 51a heat is exchanged between the indoor air supplied from the indoor fan 52a and the low-temperature refrigerant.
  • the medium-temperature refrigerant heated by the load-side heat exchanger 51a passes through the repeater 50 and flows into the low-pressure pipe 41 via the second on-off valve 20a.
  • the low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 is sucked into the compressor 1 again through the first check valve 7 , the four-way valve 2 a and the accumulator 6 .
  • the amount of heat absorbed from the compressor 1 and the load-side unit 80a must be balanced with the amount of heat released from the load-side unit 80b and the heat source-side heat exchanger 3.
  • the heat radiation amount of the heat source side heat exchanger 3 is adjusted according to the heating load.
  • the first outdoor fan 4a that can preferentially blow air to the control unit 60 does not stop, and the second outdoor fan 4b is stopped or the first outdoor fan 4b is stopped.
  • the amount of heat dissipation is adjusted by controlling the rotation speed to be lower than that of the outdoor fan 4a.
  • the rotation speed of the second outdoor fan 4b is reduced to about 10% of the rotation speed of the first outdoor fan 4a. Furthermore, when suppressing the heat radiation amount of the heat source side heat exchanger 3, the second outdoor fan 4b is stopped.
  • the first outdoor fan 4a is arranged at a position where it can blow air to the control unit 60 with priority over the second outdoor fan 4b.
  • the control unit 60 operates the first outdoor fan 4a and operates or stops the second outdoor fan 4b at a rotation speed lower than that of the first fan.
  • the heat source side heat exchanger 3 operates as a condenser, and the load side unit 80a and the load side unit 80b perform both cooling operation and heating operation. Therefore, the first outdoor fan 4 a preferentially blows air to the control unit of the heat source device 10 , thereby suppressing the temperature rise of the control unit 60 and maintaining the operation of the air conditioner 100 .
  • FIG. 6 is a diagram schematically showing an example of the circuit configuration of the air conditioner 100 according to Embodiment 2. As shown in FIG. In addition, in Embodiment 2, it demonstrates centering around difference with Embodiment 1, and the same code
  • a second expansion device 71 and a heat source side gas-liquid separation mechanism 72 are provided in parallel with the heat source side heat exchanger 3 and the expansion device 5 .
  • the second expansion device 71 functions as a pressure reducing valve or an expansion valve that reduces the pressure of the refrigerant and expands it.
  • the second throttle device 71 may be composed of, for example, an electronic expansion valve whose opening degree can be variably controlled.
  • One side of the second expansion device 71 is connected to the pipe connecting the four-way valve 2 a and the heat source side heat exchanger 3 , and the other side is connected to the gas side of the heat source side gas-liquid separation mechanism 72 .
  • the heat source side gas-liquid separation mechanism 72 separates the liquid state refrigerant and the gas state refrigerant.
  • the heat source side gas-liquid separation mechanism 72 is connected to the expansion device 5 on the liquid outflow side through which the liquid state refrigerant flows out, and the second expansion device 71 is connected to the gas passage side through which the gas state refrigerant passes.
  • the heat source side gas-liquid separation mechanism 72 has a pipe connected to the second check valve 8 on the mixing side through which liquid state refrigerant and gas state refrigerant pass.
  • the refrigerant cooled by the heat source side heat exchanger 3 flows through the expansion device 5 into the heat source side gas-liquid separation mechanism 72 .
  • the second expansion device 71 is open, the gas refrigerant flowing out of the four-way valve 2a flows into the heat source side gas-liquid separation mechanism 72 via the second expansion device 71, and the two mixed in the heat source side gas-liquid separation mechanism 72 Phase refrigerant flows into the second check valve 8 .
  • the low-pressure two-phase refrigerant flowing out of the fourth check valve 11 flows into the heat source side gas-liquid separation mechanism 72 .
  • the second expansion device 71 is open, the gas refrigerant separated by the heat source side gas-liquid separation mechanism 72 flows into the second expansion device 71, and the liquid refrigerant separated by the heat source side gas-liquid separation mechanism 72 is separated by the expansion device. Flow into 5.
  • the bypass route b is a pipe that connects a refrigerant-side inlet pipe and a refrigerant-side outlet pipe of the heat source side heat exchanger 3 .
  • the bypass route b has an expansion device 71, which is a bypass control valve that adjusts the flow rate of the refrigerant.
  • the air conditioner 100 has an operation mode in which the first outdoor fans 4a and 2 of the second outdoor fan 4b do not stop when the expansion device 71 is closed in the cooling main operation mode.
  • the air conditioner 100 has an operation mode in which the first outdoor fan 4a operates and the second outdoor fan 4b stops or slows down when the expansion device 71 is not closed in the cooling main operation mode.
  • FIG. 7 is a diagram illustrating an example of the refrigerant flow in the cooling main operation mode of the air conditioner 100 shown in FIG.
  • a cooling-dominant operation mode in which the load-side heat exchanger 51a generates a cooling load and the load-side heat exchanger 51b generates a heating load will be described.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 and the second throttle device 71 via the four-way valve 2a.
  • the heat source side heat exchanger 3 exchanges heat between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the high-temperature and high-pressure gas refrigerant.
  • the second expansion device 71 controls the opening so that the dryness at the outlet of the heat source side gas-liquid separation mechanism 72 is above a certain level.
  • both the first outdoor fan 4a and the second outdoor fan 4b operate.
  • the second throttle device 71 is open, the second outdoor fan 4b is stopped or controlled to have a rotational speed lower than that of the first outdoor fan 4a, thereby adjusting the amount of heat dissipation.
  • the rotation speed of the second outdoor fan 4b is lowered to about 10% of the rotation speed of the first outdoor fan 4a.
  • FIG. 8 is a diagram schematically showing an example of the circuit configuration of the air conditioner 100 according to Embodiment 3.
  • the air conditioner 100 of Embodiment 3 has the heat source device 10, the repeater 50, and the load side unit 80a and the load side unit 80b as separate units.
  • the repeater 50 relays heat transfer by exchanging heat with a medium that conveys heat different from the refrigerant (hereinafter referred to as a heat medium).
  • the repeater 50 includes an intermediate heat exchanger 73a and an intermediate heat exchanger 73b, a pump 48a and a pump 48b, a first heat medium flow switching device 46a and a first heat medium flow switching device 46b, and a second heat medium It has a channel switching device 47a and a second heat medium channel switching device 47b.
  • the intermediate heat exchanger 73a and the intermediate heat exchanger 73b have a heat transfer section through which the refrigerant passes and a heat transfer section through which the heat medium passes, and perform heat exchange between the mediums by the refrigerant and the heat medium.
  • the intermediate heat exchanger 73a and the intermediate heat exchanger 73b function as condensers in the heating operation, causing the refrigerant to radiate heat to heat the heat medium.
  • the intermediate heat exchanger 73a and the intermediate heat exchanger 73b function as evaporators in the cooling operation, causing the refrigerant to absorb heat to cool the heat medium.
  • the pumps 48a and 48b which are heat medium delivery devices, pressurize the heat medium to circulate.
  • the flow rate (discharge flow rate) of the heat medium can be changed by changing the rotational speed of the built-in motor (not shown) within a certain range.
  • the pump 48a which is a heat medium delivery device, is arranged in a pipe connecting the intermediate heat exchanger 73a and the second heat medium flow switching device 47a.
  • the heat medium pumped out by the pump 48a is arranged to flow into the intermediate heat exchanger 73a.
  • a pump 48b which is a heat medium delivery device, is arranged in a pipe connecting the intermediate heat exchanger 73b and the second heat medium flow switching device 47b.
  • the heat medium pumped out by the pump 48b is arranged to flow into the intermediate heat exchanger 73b.
  • the pump 48a is connected to the upstream side of the intermediate heat exchanger 73a and circulates the heat medium that has undergone heat exchange with the refrigerant.
  • the pump 48b is connected to the upstream side of the intermediate heat exchanger 73b and circulates the heat medium heat-exchanged with the refrigerant.
  • the repeater 50 has a refrigerant flow switching device 30a(1) and a refrigerant flow switching device 30a(2) that switch the refrigerant flow path flowing into the intermediate heat exchanger 73a.
  • the repeater 50 has a refrigerant flow switching device 30b(1) and a refrigerant flow switching device 30b(2) that switch the refrigerant flow path flowing into the intermediate heat exchanger 73b.
  • the repeater 50 has a first heat medium flow switching device 46a and a first heat medium flow switching device 46b that switch the heat medium flow path to the intermediate heat exchanger 73a and the intermediate heat exchanger 73b.
  • the repeater 50 has a second heat medium flow switching device 47a and a second heat medium flow switching device 47b for switching the heat medium flow path to the intermediate heat exchanger 73a and the intermediate heat exchanger 73b.
  • the first heat medium flow switching device 46a, the first heat medium flow switching device 46b, the second heat medium flow switching device 47a, and the second heat medium flow switching device 47b are the intermediate heat exchanger 73a and the intermediate heat exchanger 73a.
  • the heat medium is distributed from the heat exchanger 73b to the load side heat exchanger 51a and the load side heat exchanger 51b.
  • the repeater 50 also has a temperature sensor 28a, a temperature sensor 29a, a temperature sensor 28b, and a temperature sensor 29b.
  • the temperature sensor 28a detects the temperature of the refrigerant on the inlet side of the intermediate heat exchanger 73a.
  • the temperature sensor 29a detects the temperature of the refrigerant on the outlet side of the intermediate heat exchanger 73a.
  • the temperature sensor 28b detects the temperature of the heat medium on the inlet side of the intermediate heat exchanger 73a.
  • the temperature sensor 29b detects the temperature of the heat medium on the outlet side of the intermediate heat exchanger 73a.
  • the repeater 50 has a temperature sensor 26a, a temperature sensor 27a, a temperature sensor 26b, and a temperature sensor 27b.
  • the temperature sensor 26a detects the temperature of the refrigerant on the inlet side of the intermediate heat exchanger 73b.
  • the temperature sensor 27a detects the temperature of the refrigerant on the outlet side of the intermediate heat exchanger 73b.
  • the temperature sensor 26b detects the temperature of the heat medium on the inlet side of the intermediate heat exchanger 73b.
  • the temperature sensor 27b detects the temperature of the heat medium on the outlet side of the intermediate heat exchanger 73b.
  • FIG. 9 is a diagram explaining an example of the refrigerant flow in the cooling main operation mode of the air conditioner 100 shown in FIG.
  • the flow of the heat medium in the cooling main operation mode in which the load-side heat exchanger 3a and the load-side heat exchanger 3b generate a cooling load and a heating load will be described.
  • the heat medium discharged by the pump 48a flows into the intermediate heat exchanger 73a.
  • the intermediate heat exchanger 73a cold heat on the refrigerant side is transferred to the heat medium, and the cooled heat medium flows into the load side heat exchanger 51a via the first heat medium flow switching device 46a.
  • the load-side unit 80a is performing cooling operation, and the load-side heat exchanger 51a exchanges heat between the indoor air supplied from the indoor fan 52a and the low-temperature heat medium.
  • the medium-temperature heat medium cooled by the load-side heat exchanger 51a is again sucked into the pump 22a via the first heat medium flow switching device 46a.
  • the heat medium discharged by the pump 48b flows into the intermediate heat exchanger 73b.
  • the heat on the refrigerant side is transferred to the heat medium, and the superheated heat medium flows into the load side heat exchanger 51b via the first heat medium flow switching device 46b.
  • the load-side unit 80b is performing heating operation, and the load-side heat exchanger 51b exchanges heat between the indoor air supplied from the indoor fan 52b and the high-temperature heat medium.
  • the medium-temperature heat medium cooled by the load-side heat exchanger 51b is again sucked into the pump 22b via the second heat medium flow switching device 47b.
  • Embodiment 3 the same effect as Embodiment 1 can be obtained.
  • FIG. 10 is a diagram schematically showing an example of the circuit configuration of the air conditioner 100 according to Embodiment 4.
  • the compressor 1 and the repeater 50 include a low-pressure gas pipe 43 (third refrigerant pipe), a high-pressure gas pipe 44 (first refrigerant pipe), and a liquid pipe 45 (second refrigerant pipe). ) and are connected with
  • the heat source device 10 has a four-way valve 2a and a four-way valve 2b.
  • the four-way valve 2a switches between a refrigerant flow path in cooling operation and a refrigerant flow path in heating operation, and switches a heat exchanger acting as a condenser or a gas cooler.
  • the discharge side of the compressor 1, the heat source side heat exchanger 3, the accumulator 6, and the low-pressure gas pipe 43 are connected via the four-way valve 2a.
  • the refrigerant circuit is switched so that the discharge side of the compressor 1 and the heat source side heat exchanger 3 communicate with each other.
  • the heat source side heat exchanger 3 operates as a condenser or a gas cooler.
  • the refrigerant circuit is switched so that the heat source side heat exchanger 3 and the accumulator 6 are communicated with each other.
  • the heat source side heat exchanger 3 operates as an evaporator.
  • the four-way valve 2a and the four-way valve 2b are configured such that high-pressure gas refrigerant flows through the high-pressure gas pipe 44, liquid refrigerant flows through the liquid pipe 45, and low-pressure refrigerant flows through the low-pressure gas pipe 43. switch.
  • the four-way valve 2 b supplies part of the high-temperature, high-pressure refrigerant discharged from the compressor 1 to the high-pressure gas pipe 44 by switching the refrigerant flow path during simultaneous cooling and heating operation.
  • the discharge side of the compressor 1, the heat source side heat exchanger 3, the high pressure gas pipe 44, and the accumulator 6 are connected via the four-way valve 2b.
  • the four-way valve 2a and the four-way valve 2b are composed of a four-way valve or the like, and may be composed of a two-way valve, a three-way valve or the like.
  • the repeater 50 has a first on-off valve 19a and a first on-off valve 19b, and a second on-off valve 20a and a second on-off valve 20b.
  • the first on-off valve 19a and the first on-off valve 19b, and the second on-off valve 20a and the second on-off valve 20b are configured by two-way valves or the like.
  • FIG. 11 is a diagram illustrating an example of refrigerant flow in the cooling main operation mode of the air conditioner 100 shown in FIG.
  • the refrigerant flow in the cooling main operation mode in which the load-side heat exchanger 3a and the load-side heat exchanger 3b generate a cooling load and a heating load will be described.
  • the compressor 1 sucks in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant.
  • the high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 through the four-way valve 2a and into the high-pressure pipe 42 through the four-way valve 2b.
  • the heat source side heat exchanger 3 exchanges heat between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the high-temperature and high-pressure gas refrigerant.
  • the medium-temperature and high-pressure refrigerant cooled by the heat source side heat exchanger 3 flows through the expansion device 5 into the low-pressure gas pipe 43 .
  • Medium-temperature and high-pressure refrigerant flows into the repeater 50 through the high-pressure gas pipe 44, and into the load-side heat exchanger 51b through the second on-off valve 20b.
  • load-side heat exchanger 51b heat is exchanged between the indoor air supplied from the indoor fan 52b and the high-temperature, high-pressure refrigerant.
  • the medium-temperature refrigerant cooled by the load-side heat exchanger 51b flows into the load-side unit 80a via the indoor expansion device 53b.
  • the low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a.
  • the low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a.
  • the load-side heat exchanger 51a heat is exchanged between the indoor air supplied from the indoor fan 52a and the low-temperature refrigerant.
  • the medium-temperature refrigerant heated by the load-side heat exchanger 51a passes through the repeater 50 and flows into the low-pressure pipe 41 via the first on-off valve 19a.
  • the low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 is sucked into the compressor 1 again via the first check valve 7 , the four-way valve 2 and the accumulator 6 .
  • Embodiment 4 the same effect as Embodiment 1 can be obtained.

Abstract

This air conditioning device comprises a heat source side unit in which a heat source side heat exchanger is provided, a plurality of load side units in which load side heat exchangers are provided, and a relay unit which is connected to the heat source side unit by piping, and which distributes heat of a refrigerant supplied from the heat source side unit to the load side units, wherein: the heat source side unit comprises a control portion for controlling the operation of the heat source side unit, a first fan for blowing outdoor air over the heat source side heat exchanger, and a second fan for blowing outdoor air over the heat source side heat exchanger; the first fan is disposed in a position capable of blowing air onto the control portion more preferentially than the second fan; and in a space cooling main body operating mode in which the heat source side heat exchanger operates as a condenser and there is a mixture of load side units that perform a space cooling operation and load side units that perform a space heating operation, the control portion operates the first fan, and either operates the second fan at a lower rotational speed than the rotational speed of the first fan, or stops the second fan.

Description

空気調和装置air conditioner
　本開示は、冷房運転と暖房運転とを両立する空気調和装置に関する。 The present disclosure relates to an air conditioner that achieves both cooling operation and heating operation.
　複数の室内機の冷房運転と暖房運転とを個別に制御できる空気調和装置がある。冷房運転を行う室内機と暖房運転を行う室内機とが混在する冷房主体運転において、暖房運転する室内機の台数が多い場合、すべての室内機が冷房運転を行う全冷房運転よりも室外熱交換器で処理する熱量を小さくする必要がある。室外熱交換器の放熱量を調整する手段としては、室外熱交換器に送風するファンによる送風量の調整の技術が知られている（例えば、特許文献１参照）。 There are air conditioners that can individually control the cooling operation and heating operation of multiple indoor units. In cooling-dominant operation, in which some indoor units perform cooling operation and some indoor units perform heating operation, if there are a large number of indoor units performing heating operation, outdoor heat exchange is more efficient than cooling-only operation, in which all indoor units perform cooling operation. It is necessary to reduce the amount of heat to be processed by the vessel. As means for adjusting the amount of heat released by an outdoor heat exchanger, a technique of adjusting the amount of air blown by a fan that blows air to the outdoor heat exchanger is known (see, for example, Patent Document 1).
特開２０１２－７７９６２号公報JP 2012-77962 A
　特許文献１に記載された技術では、制御部が、ファンのオンオフ制御を行うことで、送風量を調整している。ところが、制御部は発熱する部品であるところ、特許文献１では制御部の冷却について考慮されていない。このため、制御部の温度上昇を抑制しながら冷房運転と暖房運転とを同時に行うことのできる技術が望まれていた。 In the technology described in Patent Document 1, the control unit adjusts the amount of air blown by controlling the on/off of the fan. However, since the control unit is a component that generates heat, Patent Document 1 does not consider cooling of the control unit. Therefore, there is a demand for a technology that can simultaneously perform the cooling operation and the heating operation while suppressing the temperature rise of the control unit.
　本開示は、上記実情に鑑みてなされたものであり、制御部の温度上昇を抑制しながら冷房運転と暖房運転とを同時に行うことのできる空気調和装置を提供するものである。 The present disclosure has been made in view of the above circumstances, and provides an air conditioner that can perform cooling operation and heating operation at the same time while suppressing the temperature rise of the control unit.
　本開示に係る空気調和装置は、熱源側熱交換器が設けられた熱源側ユニットと、負荷側熱交換器が設けられた複数の負荷側ユニットと、前記熱源側ユニットと配管で接続され、前記熱源側ユニットから供給される冷媒の熱を前記負荷側ユニットに分配する中継ユニットとを有し、前記熱源側ユニットは、前記熱源側ユニットの動作を制御する制御部と、前記熱源側熱交換器に室外空気を送風する第１ファンと、前記熱源側熱交換器に室外空気を送風する第２ファンとを有し、前記第１ファンは前記制御部に前記第２ファンよりも優先的に送風可能な位置に配置され、前記熱源側熱交換器が凝縮器として動作し、冷房運転を行う前記負荷側ユニットと暖房運転を行う前記負荷側ユニットとが混在する冷房主体運転モードにおいて、前記制御部は、前記第１ファンを運転し、前記第２ファンを前記第１ファンの回転数よりも低い回転数で運転、又は停止する。 An air conditioner according to the present disclosure includes a heat source side unit provided with a heat source side heat exchanger, a plurality of load side units provided with a load side heat exchanger, and the heat source side unit and the heat source side unit are connected by piping, a relay unit that distributes the heat of the refrigerant supplied from the heat source side unit to the load side unit, and the heat source side unit includes a control section that controls the operation of the heat source side unit; and the heat source side heat exchanger. and a second fan for blowing outdoor air to the heat source side heat exchanger, wherein the first fan blows air to the control unit with priority over the second fan in a cooling main operation mode in which the heat source side heat exchanger operates as a condenser and the load side unit performing cooling operation and the load side unit performing heating operation coexist, the control unit operates the first fan and operates or stops the second fan at a rotational speed lower than that of the first fan.
　本開示によれば、第１ファンは、制御部に第２ファンよりも優先的に送風可能な位置に配置される。そして、熱源側熱交換器が凝縮器として動作し、負荷側ユニットが冷房運転と暖房運転とが混在する冷房主体運転モードにおいて、制御部は、第１ファンを運転し、第２ファンを第１ファンの回転数よりも低い回転数で運転、又は停止する。従って、第１ファンが熱源側ユニットの制御部に優先的に送風することで、制御部の温度上昇を抑制しながら空気調和装置の冷房主体運転モードによる運転を維持できる。 According to the present disclosure, the first fan is arranged at a position where it can blow air to the control unit with priority over the second fan. In a cooling main operation mode in which the heat source side heat exchanger operates as a condenser and the load side unit performs both cooling operation and heating operation, the control unit operates the first fan and operates the second fan as the first fan. Operate or stop at a speed lower than that of the fan. Therefore, the first fan preferentially blows air to the controller of the heat source side unit, so that the air conditioner can be maintained in the cooling main operation mode while suppressing the temperature rise of the controller.
実施形態１に係る空気調和装置を示す回路図である。1 is a circuit diagram showing an air conditioner according to Embodiment 1. FIG. 実施形態１に係る熱源側熱交換器と、第１室外ファン及び第２室外ファンとを示し、熱源側熱交換器が凝縮器として動作する際の図である。4 is a diagram showing the heat source side heat exchanger, the first outdoor fan, and the second outdoor fan according to Embodiment 1, when the heat source side heat exchanger operates as a condenser; FIG. 実施形態１に係る圧縮機の外観を示す図である。1 is a diagram showing the appearance of a compressor according to Embodiment 1. FIG. 図４（ａ）は、実施形態１に係る圧縮機の内部の構造を示す平面図である。図４（ｂ）は、実施形態１に係る圧縮機の制御部、熱源側熱交換器、第１室外ファン及び第２室外ファンの配置構成を示す図である。FIG. 4(a) is a plan view showing the internal structure of the compressor according to Embodiment 1. FIG. FIG. 4(b) is a diagram showing the arrangement configuration of the control unit of the compressor, the heat source side heat exchanger, the first outdoor fan, and the second outdoor fan according to the first embodiment. 図１に記載の空気調和装置の冷房主体運転モード時における冷媒の流れの一例を説明する図である。FIG. 2 is a diagram illustrating an example of a flow of refrigerant in a cooling-main operation mode of the air conditioner illustrated in FIG. 1; 実施形態２に係る空気調和装置の回路構成の一例を模式的に記載した図である。FIG. 7 is a diagram schematically illustrating an example of a circuit configuration of an air conditioner according to Embodiment 2; 図６に記載の空気調和装置の冷房主体運転モード時における冷媒の流れの一例を説明する図である。FIG. 7 is a diagram illustrating an example of a flow of refrigerant in a cooling main operation mode of the air conditioner illustrated in FIG. 6; 実施形態３に係る空気調和装置の回路構成の一例を模式的に記載した図である。FIG. 11 is a diagram schematically illustrating an example of a circuit configuration of an air conditioner according to Embodiment 3; 図８に記載の空気調和装置の冷房主体運転モード時における冷媒の流れの一例を説明する図である。FIG. 9 is a diagram illustrating an example of a flow of refrigerant in a cooling main operation mode of the air conditioner shown in FIG. 8; 実施形態４に係る空気調和装置１００の回路構成の一例を模式的に記載した図である。FIG. 10 is a diagram schematically illustrating an example of a circuit configuration of an air conditioner 100 according to Embodiment 4; 図１０に記載の空気調和装置の冷房主体運転モード時における冷媒の流れの一例を説明する図である。FIG. 11 is a diagram illustrating an example of a refrigerant flow during a cooling main operation mode of the air conditioner illustrated in FIG. 10;
　以下、図面を参照して、実施形態に係る空気調和装置について説明する。なお、図面において、同一の構成要素には同一符号を付して説明し、重複説明は必要な場合に行なう。本開示は、以下の各実施形態で説明する構成のうち、組み合わせ可能な構成のあらゆる組み合わせを含み得る。また、図面では各構成部材の大きさの関係が実際のものとは異なる場合がある。そして、明細書全文に表わされている構成要素の形態は、あくまでも例示であって、明細書に記載された形態に限定するものではない。特に構成要素の組み合わせは、各実施形態における組み合わせのみに限定するものではなく、他の実施形態に記載した構成要素を別の実施形態に適用することができる。 An air conditioner according to an embodiment will be described below with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and redundant description will be given when necessary. The present disclosure may include any combination of combinable configurations among the configurations described in the following embodiments. Also, in the drawings, the size relationship of each component may differ from the actual size. The forms of the constituent elements shown in the entire specification are merely examples, and are not limited to the forms described in the specification. In particular, the combination of components is not limited only to the combinations in each embodiment, and the components described in other embodiments can be applied to other embodiments.
実施形態１．
［空気調和装置１００］
　図１は、実施形態１に係る空気調和装置１００を示す回路図である。図１に示すように、空気調和装置１００は、熱源側ユニットである熱源機１０と、負荷側ユニット８０ａ及び負荷側ユニット８０ｂと、中継ユニットである中継機５０と、を備えている。中継ユニットは、冷媒そのものを分配することと、冷媒から熱媒体へ移動される熱を分配することと、の両方を含む。なお、本実施形態１では、１台の熱源機１０に２台の負荷側ユニット８０ａ及び負荷側ユニット８０ｂが接続された場合について例示するが、熱源機１０の台数は、２台以上でも良い。また、負荷側ユニット８０の台数は、３台以上でも良い。 Embodiment 1.
[Air conditioner 100]
FIG. 1 is a circuit diagram showing an air conditioner 100 according to Embodiment 1. FIG. As shown in FIG. 1, the air conditioner 100 includes a heat source device 10 as a heat source side unit, a load side unit 80a and a load side unit 80b, and a repeater 50 as a relay unit. The relay unit includes both distribution of the refrigerant itself and distribution of heat transferred from the refrigerant to the heat transfer medium. In the first embodiment, two load- side units 80a and 80b are connected to one heat source device 10, but the number of heat source devices 10 may be two or more. Also, the number of load side units 80 may be three or more.
　図１に示すように、空気調和装置１００は、熱源機１０と、負荷側ユニット８０ａ及び負荷側ユニット８０ｂと、中継機５０とが接続されて構成されている。熱源機１０は、２台の負荷側ユニット８０ａ及び負荷側ユニット８０ｂに温熱又は冷熱を供給する機能を有している。２台の負荷側ユニット８０ａ及び負荷側ユニット８０ｂは、熱源機１０から供給される温熱又は冷熱によって、負荷側空間を冷房又は暖房する機能を有している。中継機５０は、熱源機１０と負荷側ユニット８０ａ及び負荷側ユニット８０ｂとの間で、負荷側ユニット８０ａ及び負荷側ユニット８０ｂからの要求に応じて熱源機１０から供給される冷媒の流れを切り替える機能を有している。熱源機１０と中継機５０とは、高圧冷媒が流れる高圧管４２と、低圧冷媒が流れる低圧管４１と、で接続される。 As shown in FIG. 1, the air conditioner 100 is configured by connecting a heat source device 10, a load side unit 80a and a load side unit 80b, and a repeater 50. The heat source device 10 has a function of supplying heat or cold to the two load- side units 80a and 80b. The two load- side units 80 a and 80 b have the function of cooling or heating the load-side space with the heat or cold heat supplied from the heat source device 10 . The relay device 50 switches the flow of the refrigerant supplied from the heat source device 10 between the heat source device 10 and the load side unit 80a and the load side unit 80b in accordance with requests from the load side unit 80a and the load side unit 80b. have a function. The heat source device 10 and the relay device 50 are connected by a high-pressure pipe 42 through which a high-pressure refrigerant flows and a low-pressure pipe 41 through which a low-pressure refrigerant flows.
［熱源機１０］
　熱源機１０は、例えば部屋の外部に配置され、空調の熱を排熱又は供給するものである。熱源機１０には、例えば、圧縮機１と、四方弁２ａと、熱源側熱交換器３と、絞り装置５と、アキュムレータ６と、が搭載されており、これらが配管で接続されている。また、熱源機１０には、熱源側熱交換器３に送風を行う送風機である第１室外ファン４ａ及び第２室外ファン４ｂが搭載されている。なお、本実施形態１では、２台の第１室外ファン４ａ及び第２室外ファン４ｂが搭載された場合について例示するが、第１室外ファン４ａ及び第２室外ファン４ｂの台数は３台以上でも良い。 [Heat source machine 10]
The heat source device 10 is arranged, for example, outside the room, and exhausts or supplies heat from air conditioning. The heat source device 10 includes, for example, a compressor 1, a four-way valve 2a, a heat source side heat exchanger 3, an expansion device 5, and an accumulator 6, which are connected by pipes. The heat source device 10 is also equipped with a first outdoor fan 4a and a second outdoor fan 4b, which are blowers for blowing air to the heat source side heat exchanger 3 . In the first embodiment, the case where two first outdoor fans 4a and second outdoor fans 4b are mounted is illustrated, but the number of first outdoor fans 4a and second outdoor fans 4b can be three or more. good.
　圧縮機１は、冷媒を吸入し圧縮して高温及び高圧の状態にするものであり、例えば、容量制御可能なインバータ圧縮機等で構成されている。圧縮機１は、例えば、密閉容器内に圧縮室を有し、密閉容器内が低圧の冷媒圧雰囲気になり、密閉容器内の低圧冷媒を吸入して圧縮する低圧シェル構造のものでも良い。圧縮機１は、密閉容器内が高圧の冷媒圧雰囲気になり、圧縮機吸入部に接続された配管内の低圧冷媒を吸入して圧縮する高圧シェル構造のものでも良い。 The compressor 1 takes in and compresses the refrigerant to bring it into a high temperature and high pressure state, and is composed of, for example, an inverter compressor whose capacity can be controlled. The compressor 1 may have, for example, a low-pressure shell structure that has a compression chamber in a closed container, the inside of the closed container becomes a low-pressure refrigerant pressure atmosphere, and the low-pressure refrigerant in the closed container is sucked and compressed. The compressor 1 may have a high-pressure shell structure in which the inside of the sealed container becomes a high-pressure refrigerant pressure atmosphere, and the low-pressure refrigerant in a pipe connected to the suction portion of the compressor is sucked and compressed.
　四方弁２ａは、冷房運転における冷媒流路と暖房運転における冷媒流路を切り替えて、凝縮器又はガスクーラとして作用する熱源側熱交換器３を切り替えるものである。圧縮機１の吐出側、熱源側熱交換器３、第１逆止弁７、第３逆止弁９及びアキュムレータ６が四方弁２ａを介して接続されている。なお、冷房運転時には、四方弁２ａが圧縮機１の吐出側と熱源側熱交換器３、第１逆止弁７及びアキュムレータ６とがそれぞれ連通するように冷媒回路を切り替えることで、熱源側熱交換器３が凝縮器又はガスクーラとして作用するよう動作する。暖房運転時には、四方弁２ａが圧縮機１の吐出側と第３逆止弁９、第４逆止弁１１、熱源側熱交換器３及びアキュムレータ６とがそれぞれ連通するように冷媒回路を切り替えることで、熱源側熱交換器３が蒸発器として作用するように動作する。四方弁２ａは、四方弁等からなっており、二方弁等で構成されたものであっても良い。 The four-way valve 2a switches between the refrigerant flow path in cooling operation and the refrigerant flow path in heating operation, and switches the heat source side heat exchanger 3 acting as a condenser or gas cooler. The discharge side of the compressor 1, the heat source side heat exchanger 3, the first check valve 7, the third check valve 9 and the accumulator 6 are connected via the four-way valve 2a. During cooling operation, the four-way valve 2a switches the refrigerant circuit so that the discharge side of the compressor 1 communicates with the heat source side heat exchanger 3, the first check valve 7, and the accumulator 6, so that the heat source side heat is The exchanger 3 operates to act as a condenser or gas cooler. During heating operation, the four-way valve 2a switches the refrigerant circuit so that the discharge side of the compressor 1 communicates with the third check valve 9, the fourth check valve 11, the heat source side heat exchanger 3, and the accumulator 6, respectively. , the heat source side heat exchanger 3 operates as an evaporator. The four-way valve 2a is a four-way valve or the like, and may be a two-way valve or the like.
　アキュムレータ６は、圧縮機１の吸入側である吸入部に設けられており、暖房運転モード時と冷房運転モード時との違いで発生する余剰冷媒、又は過渡的な運転の変化で発生する余剰冷媒を蓄えるものである。なお、余剰冷媒を蓄えるものとしてアキュムレータ６を使用している例を示しているが、高圧液冷媒を蓄えるレシーバーであっても良い。 The accumulator 6 is provided at the suction part on the suction side of the compressor 1, and the surplus refrigerant generated due to the difference between the heating operation mode and the cooling operation mode, or the surplus refrigerant generated due to a transitional change in operation. is stored. Although an example of using the accumulator 6 as a device for storing surplus refrigerant is shown, a receiver for storing high-pressure liquid refrigerant may be used.
　熱源機１０は、第１逆止弁７、第２逆止弁８、第３逆止弁９、第４逆止弁１１を有している。第１逆止弁７は、低圧管４１と四方弁２ａをつなぐ配管に配置され、低圧管４１から四方弁２ａに冷媒が流れるように配置される。第２逆止弁８は、高圧管４２と絞り装置５とをつなぐ配管に配置され、絞り装置５から高圧管４２に冷媒が流れるように配置される。第３逆止弁９は、四方弁２ａと高圧管４２とにつながる配管の間に接続され、熱源機１０から高圧管４２に冷媒が流れるように配置される。第４逆止弁１１は、低圧管４１と絞り装置５とをつなぐ配管に配置され、低圧管４１から熱源機１０に冷媒が流れるように配置される。 The heat source equipment 10 has a first check valve 7 , a second check valve 8 , a third check valve 9 and a fourth check valve 11 . The first check valve 7 is arranged in a pipe connecting the low-pressure pipe 41 and the four-way valve 2a so that the refrigerant flows from the low-pressure pipe 41 to the four-way valve 2a. The second check valve 8 is arranged in a pipe connecting the high-pressure pipe 42 and the expansion device 5 so that the refrigerant flows from the expansion device 5 to the high-pressure pipe 42 . The third check valve 9 is connected between the pipe connecting the four-way valve 2 a and the high pressure pipe 42 , and arranged so that the refrigerant flows from the heat source device 10 to the high pressure pipe 42 . The fourth check valve 11 is arranged in a pipe connecting the low-pressure pipe 41 and the expansion device 5 so that the refrigerant flows from the low-pressure pipe 41 to the heat source device 10 .
　また、圧縮機１は、高圧検出センサ３１と、吐出温度センサ２１と、吸入温度センサ２２と、低圧検出センサ３２と、外気温度センサ２３と、熱源側熱交換器３の液側温度を検出する温度センサ２４とを有する。 Further, the compressor 1 detects the liquid side temperature of the heat source side heat exchanger 3 with a high pressure detection sensor 31, a discharge temperature sensor 21, an intake temperature sensor 22, a low pressure detection sensor 32, an outside temperature sensor 23, and a heat source side heat exchanger 3. and a temperature sensor 24 .
　高圧検出センサ３１は、圧縮機１の吐出側の高圧圧力を検出するものである。吐出温度センサ２１は、圧縮機１から吐出される高温及び高圧の冷媒の温度を検出するものである。吸入温度センサ２２は、圧縮機１に吸入される低温及び低圧の冷媒の温度を検出するものである。低圧検出センサ３２は、圧縮機１の吸入側の冷媒の低圧圧力を検出するものである。外気温度センサ２３は、熱源側熱交換器３の空気吸込み部に設けられ、圧縮機１の周囲の温度を検出するものである。 The high pressure detection sensor 31 detects the high pressure on the discharge side of the compressor 1 . The discharge temperature sensor 21 detects the temperature of the high-temperature and high-pressure refrigerant discharged from the compressor 1 . The intake temperature sensor 22 detects the temperature of the low-temperature and low-pressure refrigerant sucked into the compressor 1 . The low pressure detection sensor 32 detects the low pressure of refrigerant on the suction side of the compressor 1 . The outside air temperature sensor 23 is provided at the air intake portion of the heat source side heat exchanger 3 and detects the ambient temperature of the compressor 1 .
　熱源側熱交換器３の容積は、圧縮機１と、負荷側ユニット８０ａ及び負荷側ユニット８０ｂと、中継機５０とのうち、冷媒が流動する配管又は容器の容積と、圧縮機１と中継機５０とを接続する配管の容積と、中継機５０と負荷側ユニット８０ａ及び負荷側ユニット８０ｂとを接続する配管の容積と、の合計に対して、１５％から３０％を占める。 The volume of the heat source side heat exchanger 3 is the volume of the pipe or container through which the refrigerant flows among the compressor 1, the load side units 80a and 80b, and the relay 50, and the volume of the compressor 1 and the relay. It occupies 15% to 30% of the total of the volume of the pipe connecting the repeater 50 and the volume of the pipe connecting the repeater 50 and the load-side unit 80a and the load-side unit 80b.
　制御部６０は、例えば空気調和装置１００の全体の制御を行うものであり、例えば、アナログ回路、デジタル回路、ＣＰＵ、又はこれらのうちの２つ以上の組み合わせを含んで構成されている。制御部６０は、例えば、上記した各種センサにおいて検出された検出情報とリモコン等の入力装置からの指示に基づいて、圧縮機１の駆動周波数、第１室外ファン４ａ及び第２室外ファン４ｂの回転数（ＯＮ／ＯＦＦ切り替えを含む）、四方弁２ａの切り替え、絞り装置５の開度、ポンプ（図示せず）の駆動周波数、室内絞り装置５３ａ及び室内絞り装置５３ｂの開度を制御して、後述する各運転モードを実行するようになっている。空気調和装置１００の運転中は、制御部６０の発熱及び熱源機１０の放熱により制御部６０の温度が上昇する。一般的に、ＣＰＵ及びマイクロプロセッサが正常に動作する温度範囲は決められている。この温度範囲を逸脱しないために、制御部６０は第１室外ファン４ａからの送風によって冷却可能な位置に配置される。また、熱源機１０は制御部６０の温度を検出する温度センサ２６を有する。 The control unit 60 controls, for example, the entire air conditioner 100, and includes, for example, an analog circuit, a digital circuit, a CPU, or a combination of two or more of these. For example, the control unit 60 controls the driving frequency of the compressor 1 and the rotation of the first outdoor fan 4a and the second outdoor fan 4b based on detection information detected by the various sensors described above and instructions from an input device such as a remote controller. number (including ON/OFF switching), switching of the four-way valve 2a, opening degree of the expansion device 5, drive frequency of the pump (not shown), opening degree of the indoor expansion device 53a and the indoor expansion device 53b, Each operation mode, which will be described later, is executed. During operation of the air conditioner 100 , the temperature of the control unit 60 rises due to the heat generated by the control unit 60 and the heat radiation from the heat source device 10 . Generally, the temperature range within which CPUs and microprocessors operate normally is determined. In order not to deviate from this temperature range, the control unit 60 is arranged at a position where it can be cooled by air blowing from the first outdoor fan 4a. The heat source device 10 also has a temperature sensor 26 that detects the temperature of the control section 60 .
　制御部６０の処理回路が専用のハードウェアである場合、処理回路は、例えば、単一回路、複合回路、ＡＳＩＣ（Ａｐｐｌｉｃａｔｉｏｎ　Ｓｐｅｃｉｆｉｃ Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）、ＦＰＧＡ（Ｆｉｅｌｄ　Ｐｒｏｇｒａｍｍａｂｌｅ　Ｇａｔｅ Ａｒｒａｙ）、又はこれらを組み合わせたものが該当する。処理回路が実現する各機能部のそれぞれを、個別のハードウェアで実現しても良いし、各機能部が一つのハードウェアで実現されても良い。制御部６０の処理回路がＣＰＵの場合、処理回路が実行する各機能は、ソフトウェア、ファームウェア、又はソフトウェアとファームウェアとの組み合わせにより実現される。ソフトウェア及びファームウェアはプログラムとして記述され、記憶部に格納される。ＣＰＵは、記憶部に格納されたプログラムを読み出して実行することにより、処理回路の各機能を実現する。なお、処理回路の機能の一部を専用のハードウェアで実現し、一部をソフトウェア又はファームウェアで実現するようにしても良い。 When the processing circuit of the control unit 60 is dedicated hardware, the processing circuit is, for example, a single circuit, a composite circuit, an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a combination thereof. is applicable. Each functional unit implemented by the processing circuit may be implemented by separate hardware, or each functional unit may be implemented by one piece of hardware. When the processing circuit of the control unit 60 is a CPU, each function executed by the processing circuit is implemented by software, firmware, or a combination of software and firmware. Software and firmware are written as programs and stored in the storage unit. The CPU implements each function of the processing circuit by reading and executing a program stored in the storage unit. A part of the functions of the processing circuit may be realized by dedicated hardware, and a part thereof may be realized by software or firmware.
［室内機］
　負荷側ユニット８０ａは、例えば、部屋の内部に配置され、室内に空調空気を供給するものである。負荷側ユニット８０ａは、蒸発器又は凝縮器として動作する負荷側熱交換器５１ａを有している。負荷側ユニット８０ｂは、例えば、部屋の内部に配置され、室内に空調空気を供給するものである。負荷側ユニット８０ｂは、蒸発器又は凝縮器として動作する負荷側熱交換器５１ｂを有している。 [Indoor unit]
The load-side unit 80a is, for example, arranged inside a room and supplies conditioned air to the room. The load side unit 80a has a load side heat exchanger 51a that operates as an evaporator or condenser. The load-side unit 80b is, for example, arranged inside a room and supplies conditioned air to the room. The load side unit 80b has a load side heat exchanger 51b that operates as an evaporator or condenser.
　負荷側熱交換器５１ａ及び負荷側熱交換器５１ｂは、配管を介して、中継機５０と接続されている。負荷側熱交換器５１ａ及び負荷側熱交換器５１ｂは、空気と冷媒とを熱交換させることで、室内空間に供給する暖房用空気あるいは冷房用空気を生成するものである。負荷側熱交換器５１ａには、室内ファン５２ａによって室内空気が送風されるようになっている。負荷側熱交換器５１ｂには、室内ファン５２ｂによって室内空気が送風されるようになっている。 The load-side heat exchanger 51a and the load-side heat exchanger 51b are connected to the repeater 50 via piping. The load-side heat exchanger 51a and the load-side heat exchanger 51b exchange heat between air and refrigerant to generate heating air or cooling air to be supplied to the indoor space. Indoor air is blown to the load-side heat exchanger 51a by an indoor fan 52a. Indoor air is blown to the load-side heat exchanger 51b by an indoor fan 52b.
　室内絞り装置５３ａ及び室内絞り装置５３ｂは、開口面積を制御できる二方弁等で構成されている。室内絞り装置５３ａは、負荷側熱交換器５１ａに流れる熱媒体の流量を調整するものである。室内絞り装置５３ｂは、負荷側熱交換器５１ｂに流れる熱媒体の流量を調整するものである。 The indoor expansion device 53a and the indoor expansion device 53b are composed of a two-way valve or the like that can control the opening area. The indoor expansion device 53a adjusts the flow rate of the heat medium flowing through the load side heat exchanger 51a. The indoor throttle device 53b adjusts the flow rate of the heat medium flowing through the load-side heat exchanger 51b.
　室内絞り装置５３ａは、一方が負荷側熱交換器５１ａに、他方が中継機５０と接続する配管に接続され、負荷側熱交換器５１ａの熱媒体流路の液冷媒側に設けられている。室内絞り装置５３ｂは、一方が負荷側熱交換器５１ｂに、他方が中継機５０と接続する配管に接続され、負荷側熱交換器５１ｂの熱媒体流路の液冷媒側に設けられている。 One side of the indoor expansion device 53a is connected to the load side heat exchanger 51a, and the other side is connected to the pipe connecting to the repeater 50. The indoor expansion device 53a is provided on the liquid refrigerant side of the heat medium flow path of the load side heat exchanger 51a. One side of the indoor expansion device 53b is connected to the load side heat exchanger 51b, and the other side is connected to the pipe connecting to the repeater 50. The indoor expansion device 53b is provided on the liquid refrigerant side of the heat medium flow path of the load side heat exchanger 51b.
　また、負荷側ユニット８０ａは、室内熱交ガス温度センサ５４ａと室内熱交液温度センサ５６ａとを有している。負荷側ユニット８０ｂは、室内熱交ガス温度センサ５４ｂと室内熱交液温度センサ５６ｂとを有している。 The load side unit 80a also has an indoor heat exchange gas temperature sensor 54a and an indoor heat exchange liquid temperature sensor 56a. The load side unit 80b has an indoor heat exchange gas temperature sensor 54b and an indoor heat exchange liquid temperature sensor 56b.
　室内熱交ガス温度センサ５４ａ及び室内熱交ガス温度センサ５４ｂは、例えばサーミスター等で構成されている。室内熱交ガス温度センサ５４ａは、負荷側熱交換器５１ａに流入又は流出する冷媒のガス温度を検出するものである。室内熱交ガス温度センサ５４ｂは、負荷側熱交換器５１ｂに流入又は流出する冷媒のガス温度を検出するものである。室内熱交ガス温度センサ５４ａは、負荷側熱交換器５１ａのガス配管に設けられている。室内熱交ガス温度センサ５４ｂは、負荷側熱交換器５１ｂのガス配管に設けられている。 The indoor heat exchanger gas temperature sensor 54a and the indoor heat exchanger gas temperature sensor 54b are composed of, for example, thermistors. The indoor heat exchanger gas temperature sensor 54a detects the gas temperature of the refrigerant flowing into or out of the load side heat exchanger 51a. The indoor heat exchanger gas temperature sensor 54b detects the gas temperature of the refrigerant flowing into or out of the load side heat exchanger 51b. The indoor heat exchanger gas temperature sensor 54a is provided in the gas pipe of the load side heat exchanger 51a. The indoor heat exchanger gas temperature sensor 54b is provided in the gas pipe of the load side heat exchanger 51b.
　室内熱交液温度センサ５６ａ及び室内熱交液温度センサ５６ｂは、例えばサーミスター等で構成されている。室内熱交液温度センサ５６ａは、負荷側熱交換器５１ａに流入又は流出する液冷媒の温度を検出するものである。室内熱交液温度センサ５６ｂは、負荷側熱交換器５１ｂに流入又は流出する液冷媒の温度を検出するものである。 The indoor heat exchange fluid temperature sensor 56a and the indoor heat exchange fluid temperature sensor 56b are composed of, for example, thermistors. The indoor heat exchange liquid temperature sensor 56a detects the temperature of the liquid refrigerant flowing into or out of the load side heat exchanger 51a. The indoor heat exchange liquid temperature sensor 56b detects the temperature of the liquid refrigerant flowing into or out of the load side heat exchanger 51b.
　室内熱交液温度センサ５６ａは、負荷側熱交換器５１ａの熱媒体の出口側に設けられている。室内熱交液温度センサ５６ｂは、負荷側熱交換器５１ｂの熱媒体の出口側に設けられている。 The indoor heat exchange fluid temperature sensor 56a is provided on the heat medium outlet side of the load side heat exchanger 51a. The indoor heat exchange fluid temperature sensor 56b is provided on the heat medium outlet side of the load side heat exchanger 51b.
［中継機５０］
　中継機５０は、例えば負荷側ユニット８０ａ及び負荷側ユニット８０ｂとは別の建物内の非空調空間に配置される。中継機５０は、気液分離機構１２と、第１冷媒間熱交換器１３と、第２冷媒間熱交換器１４と、第１中継機絞り装置１５と、第２中継機絞り装置１６と、を有する。 [Relay machine 50]
The repeater 50 is arranged, for example, in a non-air-conditioned space in a building separate from the load-side unit 80a and the load-side unit 80b. The relay 50 includes a gas-liquid separation mechanism 12, a first heat exchanger between refrigerants 13, a second heat exchanger between refrigerants 14, a first relay throttle device 15, a second relay throttle device 16, have
　中継機５０は、負荷側熱交換器５１ａのガス側配管と接続される、第１開閉弁１９ａ及び第２開閉弁２０ａを有する。中継機５０は、負荷側熱交換器５１ｂのガス側配管と接続される、第１開閉弁１９ｂ及び第２開閉弁２０ｂとを有する。 The repeater 50 has a first on-off valve 19a and a second on-off valve 20a that are connected to the gas-side pipe of the load-side heat exchanger 51a. The repeater 50 has a first on-off valve 19b and a second on-off valve 20b that are connected to the gas-side pipe of the load-side heat exchanger 51b.
　第１開閉弁１９ａ及び第１開閉弁１９ｂは、気液分離機構１２のガス側出口に接続され、第２開閉弁２０ａ及び第２開閉弁２０ｂは、中継機５０と高圧管４２とをつなぐ配管に接続される。 The first on-off valve 19a and the first on-off valve 19b are connected to the gas side outlet of the gas-liquid separation mechanism 12, and the second on-off valve 20a and the second on-off valve 20b are pipes connecting the repeater 50 and the high-pressure pipe 42. connected to
　第１開閉弁１９ａ及び第１開閉弁１９ｂと、第２開閉弁２０ａ及び第２開閉弁２０ｂとは、例えば、二方弁等で構成されている。 The first on-off valve 19a and the first on-off valve 19b, and the second on-off valve 20a and the second on-off valve 20b are, for example, two-way valves.
　中継機５０は、第１中継機逆止弁１７ａ及び第１中継機逆止弁１７ｂと、第２中継機逆止弁１８ａ及び第２中継機逆止弁１８ｂと、を有する。 The repeater 50 has a first repeater check valve 17a and a first repeater check valve 17b, and a second repeater check valve 18a and a second repeater check valve 18b.
　第１中継機逆止弁１７ａは、中継機５０と負荷側ユニット８０ａとを接続する配管に配置され、中継機５０から室内絞り装置５３ａに冷媒が流れるように配置される。第１中継機逆止弁１７ｂは、中継機５０と負荷側ユニット８０ｂとを接続する配管に配置され、中継機５０から室内絞り装置５３ｂに冷媒が流れるように配置される。 The first relay check valve 17a is arranged in the pipe connecting the relay 50 and the load side unit 80a, and arranged so that the refrigerant flows from the relay 50 to the indoor expansion device 53a. The first relay check valve 17b is arranged in a pipe connecting the relay 50 and the load side unit 80b, and arranged so that the refrigerant flows from the relay 50 to the indoor expansion device 53b.
　第２中継機逆止弁１８ａは、中継機５０と負荷側ユニット８０ａとを接続する配管に配置され、室内絞り装置５３ａから中継機５０に冷媒が流れるように配置される。第２中継機逆止弁１８ｂは、中継機５０と負荷側ユニット８０ｂとを接続する配管に配置され、室内絞り装置５３ｂから中継機５０に冷媒が流れるように配置される。 The second relay check valve 18a is arranged in the pipe connecting the relay 50 and the load side unit 80a, and arranged so that the refrigerant flows from the indoor expansion device 53a to the relay 50. The second relay check valve 18b is arranged in the pipe that connects the relay 50 and the load side unit 80b, and is arranged so that the refrigerant flows from the indoor expansion device 53b to the relay 50.
　また、中継機５０は、高圧側液圧力センサ３３、液流出圧力センサ３４及び中継機温度センサ２５が設けられている。高圧側液圧力センサ３３は、第１冷媒間熱交換器１３と第１中継機絞り装置１５の間に設けられている。液流出圧力センサ３４は、第１中継機絞り装置１５と第２冷媒間熱交換器１４との間に設けられている。中継機温度センサ２５は、第１冷媒間熱交換器１３の低圧側出口と高圧管４２とを接続する配管に配置されている。 In addition, the repeater 50 is provided with a high pressure side liquid pressure sensor 33 , a liquid outflow pressure sensor 34 and a repeater temperature sensor 25 . The high pressure side liquid pressure sensor 33 is provided between the first heat exchanger between refrigerants 13 and the first relay throttle device 15 . The liquid outflow pressure sensor 34 is provided between the first relay throttle device 15 and the second refrigerant heat exchanger 14 . The repeater temperature sensor 25 is arranged in a pipe connecting the low-pressure side outlet of the first heat exchanger between refrigerants 13 and the high-pressure pipe 42 .
［熱源側熱交換器３と第１室外ファン４ａ及び第２室外ファン４ｂとの関係］
　図２は、実施形態１に係る熱源側熱交換器３と、第１室外ファン４ａ及び第２室外ファン４ｂとを示し、熱源側熱交換器３が凝縮器として動作する際の図である。 [Relationship between heat source side heat exchanger 3 and first outdoor fan 4a and second outdoor fan 4b]
FIG. 2 shows the heat source side heat exchanger 3, the first outdoor fan 4a and the second outdoor fan 4b according to Embodiment 1, and is a diagram when the heat source side heat exchanger 3 operates as a condenser.
　熱源側熱交換器３は、冷媒が流れる複数の配管と、伝熱面積を拡大するためのフィンで構成される。図２において、黒矢印は、冷媒の流れを示し、白矢印は空気流れを示している。図２において、冷媒は紙面左から熱源側熱交換器３に流入し、紙面奥行き方向に流れ、紙面手前に折り返したのち紙面右方向へ流出する。熱源側熱交換器３が凝縮器として動作する場合、第１室外ファン４ａ及び第２室外ファン４ｂから供給される空気と冷媒の流れが対向流となるように第１室外ファン４ａ及び第２室外ファン４ｂは配置される。 The heat source side heat exchanger 3 is composed of multiple pipes through which refrigerant flows and fins for enlarging the heat transfer area. In FIG. 2, black arrows indicate the flow of refrigerant, and white arrows indicate the flow of air. In FIG. 2, the refrigerant flows into the heat source side heat exchanger 3 from the left side of the page, flows in the depth direction of the page, turns back to the front of the page, and then flows out to the right side of the page. When the heat source side heat exchanger 3 operates as a condenser, the first outdoor fan 4a and the second outdoor fan 4a and the second outdoor fan 4a are arranged so that the air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the refrigerant flow countercurrently. A fan 4b is arranged.
［制御部と室外ファンの関係］
　図３は、実施形態１に係る熱源機１０の外観を示す図である。図３に示されるように、熱源機１０は、いわゆるトランク型の熱源機として構成されており、前壁１０ａ、後壁１０ｂ、左側壁１０ｃ、右側壁１０ｄ、天井壁１０ｅ、及び底板１０ｆを有する直方体形状をしている。前壁１０ａにおける左側の部位の上側には第１室外ファン４ａの吹出口１０３ａが形成されている。前壁１０ａにおける左側の部位の下側には第２室外ファン４ｂの吹出口１０３ｂが形成されている。右側壁１０ｄには、外気を熱源機１０に吸い込み可能な吸込口１０ｇが形成されている。 [Relationship between controller and outdoor fan]
FIG. 3 is a diagram showing the appearance of the heat source equipment 10 according to the first embodiment. As shown in FIG. 3, the heat source machine 10 is configured as a so-called trunk-type heat source machine, and has a front wall 10a, a rear wall 10b, a left wall 10c, a right wall 10d, a ceiling wall 10e, and a bottom plate 10f. It has a rectangular parallelepiped shape. An air outlet 103a of the first outdoor fan 4a is formed above the left portion of the front wall 10a. An outlet 103b of the second outdoor fan 4b is formed below the left portion of the front wall 10a. The right side wall 10d is formed with a suction port 10g through which outside air can be sucked into the heat source device 10. As shown in FIG.
　図４（ａ）は、実施形態１に係る熱源機１０の内部の構造を示す平面図である。図４（ａ）においては、熱源機１０の構成のうち熱源側熱交換器３、第１室外ファン４ａ、制御部６０及び制御部６０の放熱板６１が示されている。図４（ｂ）は、実施形態１に係る熱源機１０の制御部６０、熱源側熱交換器３、第１室外ファン４ａ及び第２室外ファン４ｂの配置構成を示す図である。 FIG. 4(a) is a plan view showing the internal structure of the heat source equipment 10 according to Embodiment 1. FIG. 4A shows the heat source side heat exchanger 3, the first outdoor fan 4a, the controller 60, and the radiator plate 61 of the controller 60 in the configuration of the heat source device 10. FIG. FIG. 4(b) is a diagram showing the arrangement configuration of the control unit 60, the heat source side heat exchanger 3, the first outdoor fan 4a, and the second outdoor fan 4b of the heat source device 10 according to the first embodiment.
　図４（ａ）に示すように、熱源機１０は、仕切り板１０ｈによって仕切られている。図４（ａ）の仕切り板１０ｈより左側には、熱源側熱交換器３及び第１室外ファン４ａ及び第２室外ファン４ｂが配置され、仕切り板１０ｈより右側にはその他の構成要素が配置されている。 As shown in FIG. 4(a), the heat source device 10 is partitioned by a partition plate 10h. The heat source side heat exchanger 3, the first outdoor fan 4a and the second outdoor fan 4b are arranged on the left side of the partition plate 10h in FIG. 4(a), and other components are arranged on the right side of the partition plate 10h. ing.
　図４（ｂ）に示すように、制御部６０は、例えば、直方体の電気品箱に収容されており、熱源機１０の内部の上部の右側壁１０ｄに配置されている。電気品箱に収容された制御部６０のことを、単に制御部６０と称する。また、制御部６０は、第１室外ファン４ａと、熱源側熱交換器３との間であり、第１室外ファン４ａと同程度の高さに配置されている。第２室外ファン４ｂと制御部６０との距離よりも、第１室外ファン４ａと制御部６０との距離の方が短いことにより、制御部６０は、第２室外ファン４ｂではなく、主に、第１室外ファン４ａによる風により冷却される。 As shown in FIG. 4(b), the control unit 60 is housed in, for example, a rectangular parallelepiped electrical component box, and is arranged on the upper right side wall 10d inside the heat source device 10. As shown in FIG. The controller 60 housed in the electrical component box is simply called the controller 60 . Further, the control unit 60 is arranged between the first outdoor fan 4a and the heat source side heat exchanger 3 and at approximately the same height as the first outdoor fan 4a. Since the distance between the first outdoor fan 4a and the control unit 60 is shorter than the distance between the second outdoor fan 4b and the control unit 60, the control unit 60 operates not the second outdoor fan 4b, but mainly It is cooled by wind from the first outdoor fan 4a.
　図４（ａ）に示すように、放熱板６１は、制御部６０と接触するように配置され、制御部６０からの発熱を放熱する冷却装置である。放熱板６１は、例えば、ヒートシンクのようなフィンで構成されている。熱源機１０は、第１室外ファン４ａにより吸込口１０ｇ（図３参照）から放熱板６１へ空気を供給するための吹出し口１０ｉを有している。制御部６０は、吸込口１０ｇ（図３参照）から吸入した空気を放熱板６１へ供給することで冷却され、放熱板６１で加熱された空気は吹出し口１０ｉから、熱源側熱交換器３を通過した空気とともに排出される。 As shown in FIG. 4( a ), the radiator plate 61 is a cooling device that is arranged so as to be in contact with the controller 60 and dissipates heat generated from the controller 60 . The radiator plate 61 is composed of, for example, fins like a heat sink. The heat source device 10 has an air outlet 10i for supplying air from the air inlet 10g (see FIG. 3) to the radiator plate 61 by the first outdoor fan 4a. The control unit 60 is cooled by supplying the air sucked from the suction port 10g (see FIG. 3) to the radiator plate 61, and the air heated by the radiator plate 61 flows through the heat source side heat exchanger 3 from the blowout port 10i. It is discharged with the passing air.
［空気調和装置１００の運転モード］
　次に、空気調和装置１００が実行する運転モードについて説明する。空気調和装置１００は、負荷側ユニット８０ａ及び負荷側ユニット８０ｂからの指示に基づいて、全冷房運転、全暖房運転、冷房主体運転及び暖房主体運転を実行するようになっている。全冷房運転は、負荷側ユニット８０ａ及び負荷側ユニット８０ｂの全てが冷房運転モードを行うモードである。全暖房運転は、負荷側ユニット８０ａ及び負荷側ユニット８０ｂの全てが暖房運転モードを行うモードである。冷房主体運転は、負荷側ユニット８０ａ及び負荷側ユニット８０ｂの運転モードが冷房運転と暖房運転が混在する冷暖同時運転モードのうち、冷房負荷の方が大きい運転モードである。暖房主体運転は、冷暖同時運転モードのうち暖房負荷の方が大きい運転モードである。 [Operating Mode of Air Conditioner 100]
Next, operation modes executed by the air conditioner 100 will be described. The air conditioner 100 performs cooling-only operation, heating-only operation, cooling-main operation, and heating-main operation based on instructions from the load-side unit 80a and the load-side unit 80b. The cooling only operation is a mode in which both the load-side unit 80a and the load-side unit 80b perform the cooling operation mode. The heating only operation is a mode in which both the load side unit 80a and the load side unit 80b perform the heating operation mode. The cooling-dominant operation is an operation mode in which the load-side unit 80a and the load-side unit 80b are in a simultaneous cooling/heating operation mode in which the cooling operation and the heating operation are mixed, and the cooling load is larger. The heating-dominant operation is an operation mode in which the heating load is larger among the simultaneous cooling and heating operation modes.
　以下に、各運転モードについて、冷媒の流れ及び冷媒の状態とともに説明する。
［冷房運転モード］
　負荷側熱交換器３ａ及び負荷側熱交換器３ｂで冷熱負荷が発生している冷房運転モードについて説明する。 Each operation mode will be described below together with the flow of the refrigerant and the state of the refrigerant.
[Cooling operation mode]
A cooling operation mode in which a cooling load is generated in the load-side heat exchanger 3a and the load-side heat exchanger 3b will be described.
　まず、冷媒の流れについて説明する。圧縮機１は、低温及び低圧のガス冷媒を吸入し、圧縮して、高温及び高圧のガス冷媒を吐出する。圧縮機１から吐出された高温及び高圧のガス冷媒は、四方弁２ａを介して、熱源側熱交換器３に流入する。 First, the flow of the refrigerant will be explained. The compressor 1 takes in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 via the four-way valve 2a.
　熱源側熱交換器３は、第１室外ファン４ａ及び第２室外ファン４ｂから供給される室外空気と高温及び高圧のガス冷媒とを熱交換する。熱源側熱交換器３で冷却された中温及び高圧の冷媒は、絞り装置５、第２逆止弁８を介して高圧管４２に流入する。 The heat source side heat exchanger 3 exchanges heat between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the high-temperature and high-pressure gas refrigerant. The medium-temperature and high-pressure refrigerant cooled in the heat source side heat exchanger 3 flows through the expansion device 5 and the second check valve 8 into the high-pressure pipe 42 .
　中温及び高圧の冷媒は、高圧管４２を介して中継機５０に流入し、気液分離機構１２、第１冷媒間熱交換器１３、第１中継機絞り装置１５、第２冷媒間熱交換器１４を介して、第１中継機逆止弁１７ａ及び第１中継機逆止弁１７ｂに流入する。また、第２中継機絞り装置１６で減圧された低温及び低圧の冷媒は、第２冷媒間熱交換器１４及び第１冷媒間熱交換器１３に流入し、中温高圧の液冷媒と熱交換し、ガス化して流出する。第１冷媒間熱交換器１３と第２冷媒間熱交換器１４とで冷却された中温及び高圧の液冷媒は、第１中継機逆止弁１７ａ及び第１中継機逆止弁１７ｂを介して負荷側ユニット８０ａ及び負荷側ユニット８０ｂに流入する。 The medium-temperature and high-pressure refrigerant flows into the repeater 50 through the high-pressure pipe 42, and passes through the gas-liquid separation mechanism 12, the first refrigerant heat exchanger 13, the first repeater throttle device 15, and the second refrigerant heat exchanger. 14, it flows into the first relay check valve 17a and the first relay check valve 17b. In addition, the low-temperature and low-pressure refrigerant decompressed by the second relay throttle device 16 flows into the second heat exchanger between refrigerants 14 and the first heat exchanger between refrigerants 13, and exchanges heat with medium-temperature and high-pressure liquid refrigerant. , gasifies and flows out. The medium-temperature and high-pressure liquid refrigerant cooled by the first heat exchanger between refrigerants 13 and the second heat exchanger between refrigerants 14 passes through the first relay check valve 17a and the first relay check valve 17b. It flows into the load side unit 80a and the load side unit 80b.
　室内絞り装置５３ａで減圧された低温低圧の二相冷媒は、負荷側熱交換器５１ａに流入する。室内絞り装置５３ｂで減圧された低温低圧の二相冷媒は、負荷側熱交換器５１ｂに流入する。 The low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a. The low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53b flows into the load-side heat exchanger 51b.
　負荷側熱交換器５１ａでは、室内ファン５２ａから供給される室内空気と低温冷媒とが熱交換される。負荷側熱交換器５１ａで加熱された中温の冷媒は、第２開閉弁２０ａを介して、中継機５０を通過し、低圧管４１に流入する。負荷側熱交換器５１ｂでは、室内ファン５２ｂから供給される室内空気と低温冷媒とが熱交換される。負荷側熱交換器５１ｂで加熱された中温の冷媒は、第２開閉弁２０ｂを介して、中継機５０を通過し、低圧管４１に流入する。 In the load-side heat exchanger 51a, heat is exchanged between the indoor air supplied from the indoor fan 52a and the low-temperature refrigerant. The medium-temperature refrigerant heated by the load-side heat exchanger 51a passes through the relay device 50 and flows into the low-pressure pipe 41 via the second on-off valve 20a. In the load-side heat exchanger 51b, heat is exchanged between the indoor air supplied from the indoor fan 52b and the low-temperature refrigerant. The medium-temperature refrigerant heated by the load-side heat exchanger 51b passes through the relay device 50 and flows into the low-pressure pipe 41 via the second on-off valve 20b.
　低圧管４１から熱源機１０に流入した低圧ガス冷媒は、第１逆止弁７、四方弁２ａ、アキュムレータ６を介して圧縮機１へ再度吸入される。 The low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 is sucked into the compressor 1 again via the first check valve 7, the four-way valve 2a, and the accumulator 6.
　第１室外ファン４ａ及び第２室外ファン４ｂは、高圧検出センサ３１で検出される圧力を一定値以上に保つように回転数を制御する。また、制御部６０は、温度センサ２６で検出された温度が一定値以上になった場合、第１室外ファン４ａの回転数を増速させ、制御部６０を優先的に冷却しても良い。 The first outdoor fan 4a and the second outdoor fan 4b control the number of rotations so that the pressure detected by the high pressure detection sensor 31 is kept above a certain value. Further, when the temperature detected by the temperature sensor 26 exceeds a certain value, the controller 60 may increase the speed of the first outdoor fan 4a to cool the controller 60 preferentially.
［暖房運転モード］
　負荷側ユニット８０ａ及び負荷側ユニット８０ｂが暖房を行っている暖房運転モードについて説明する。 [Heating operation mode]
A heating operation mode in which the load-side unit 80a and the load-side unit 80b perform heating will be described.
　まず、冷媒の流れについて説明する。圧縮機１は、低温及び低圧のガス冷媒を吸入し、圧縮して、高温及び高圧のガス冷媒を吐出する。圧縮機１から吐出された高温及び高圧のガス冷媒は、四方弁２ａ、第３逆止弁９を介して高圧管４２に流入する。 First, the flow of the refrigerant will be explained. The compressor 1 takes in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the high-pressure pipe 42 via the four-way valve 2 a and the third check valve 9 .
　高圧管４２から中継機５０に流入した高圧ガス冷媒は、気液分離機構１２、第１開閉弁１９ａを介して負荷側熱交換器５１ａに流入する。高圧管４２から中継機５０に流入した高圧ガス冷媒は、気液分離機構１２、第１開閉弁１９ｂを介して負荷側熱交換器５１ｂに流入する。 The high-pressure gas refrigerant that has flowed into the repeater 50 from the high-pressure pipe 42 flows into the load-side heat exchanger 51a via the gas-liquid separation mechanism 12 and the first on-off valve 19a. The high-pressure gas refrigerant that has flowed into the repeater 50 from the high-pressure pipe 42 flows into the load-side heat exchanger 51b via the gas-liquid separation mechanism 12 and the first on-off valve 19b.
　このとき、負荷側ユニット８０ａ及び負荷側ユニット８０ｂは暖房運転を行っている。負荷側熱交換器５１ａでは、室内ファン５２ａから供給される室内空気と高温高圧冷媒とが熱交換される。負荷側熱交換器５１ｂでは、室内ファン５２ｂから供給される室内空気と高温高圧冷媒とが熱交換される。 At this time, the load side unit 80a and the load side unit 80b are performing heating operation. In the load-side heat exchanger 51a, heat is exchanged between the indoor air supplied from the indoor fan 52a and the high-temperature, high-pressure refrigerant. In the load-side heat exchanger 51b, heat is exchanged between the indoor air supplied from the indoor fan 52b and the high-temperature, high-pressure refrigerant.
　負荷側熱交換器５１ａで冷却された中温の冷媒は、室内絞り装置５３ａを介し、第２中継機逆止弁１８ａから中継機５０へ流入する。負荷側熱交換器５１ｂで冷却された中温の冷媒は、室内絞り装置５３ｂを介し、第２中継機逆止弁１８ｂから中継機５０へ流入する。 The medium-temperature refrigerant cooled by the load-side heat exchanger 51a flows into the repeater 50 from the second repeater check valve 18a via the indoor expansion device 53a. The medium-temperature refrigerant cooled by the load-side heat exchanger 51b flows into the repeater 50 from the second repeater check valve 18b via the indoor expansion device 53b.
　中温の冷媒は、第２中継機絞り装置１６、第２冷媒間熱交換器１４、第１冷媒間熱交換器１３を介して、低圧管４１へ流入する。低圧管４１から熱源機１０に流入した低圧ガス冷媒は、第４逆止弁１１、絞り装置５を介して、熱源側熱交換器３へ流入する。熱源側熱交換器３では、第１室外ファン４ａ及び第２室外ファン４ｂから供給される室外空気と低温低圧冷媒とが熱交換される。熱源側熱交換器３で加熱された低温の冷媒は、四方弁２ａ、アキュムレータ６を介して圧縮機１へ再度吸入される。 The medium-temperature refrigerant flows into the low-pressure pipe 41 via the second relay throttle device 16, the second heat exchanger between refrigerants 14, and the first heat exchanger between refrigerants 13. The low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 flows into the heat source side heat exchanger 3 via the fourth check valve 11 and the expansion device 5 . In the heat source side heat exchanger 3, heat is exchanged between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the low-temperature, low-pressure refrigerant. The low-temperature refrigerant heated by the heat source side heat exchanger 3 is sucked again into the compressor 1 via the four-way valve 2 a and the accumulator 6 .
　［暖房主体運転モード］
　負荷側熱交換器５１ａ及び負荷側熱交換器５１ｂで冷房負荷と暖房負荷とが発生している暖房主体運転モードについて説明する。ここでは、負荷側ユニット８０ａが冷房運転、負荷側ユニット８０ｂが暖房運転を行っている例を説明する。 [Heating main operation mode]
A heating-dominant operation mode in which the load-side heat exchanger 51a and the load-side heat exchanger 51b generate a cooling load and a heating load will be described. Here, an example in which the load-side unit 80a performs cooling operation and the load-side unit 80b performs heating operation will be described.
　まず、冷媒の流れについて説明する。圧縮機１は、低温及び低圧のガス冷媒を吸入し、圧縮して、高温及び高圧のガス冷媒を吐出する。圧縮機１から吐出された高温及び高圧のガス冷媒は、四方弁２ａ、第３逆止弁９を介して高圧管４２に流入する。 First, the flow of the refrigerant will be explained. The compressor 1 takes in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the high-pressure pipe 42 via the four-way valve 2 a and the third check valve 9 .
　高圧管４２から中継機５０に流入した高圧ガス冷媒は、気液分離機構１２、第１開閉弁１９ｂを介して負荷側熱交換器５１ｂに流入する。負荷側熱交換器５１ｂでは、室内ファン５２ｂから供給される室内空気と高温高圧冷媒とが熱交換される。 The high-pressure gas refrigerant that has flowed into the repeater 50 from the high-pressure pipe 42 flows into the load-side heat exchanger 51b via the gas-liquid separation mechanism 12 and the first on-off valve 19b. In the load-side heat exchanger 51b, heat is exchanged between the indoor air supplied from the indoor fan 52b and the high-temperature, high-pressure refrigerant.
　負荷側熱交換器５１ｂで冷却された中温の冷媒は、室内絞り装置５３ｂを介し、第２中継機逆止弁１８ｂから第１中継機逆止弁１７ａに流入する。冷媒は、第１中継機逆止弁１７ａを介して負荷側ユニット８０ａに流入する。 The medium-temperature refrigerant cooled by the load-side heat exchanger 51b flows from the second relay check valve 18b into the first relay check valve 17a via the indoor expansion device 53b. The refrigerant flows into the load side unit 80a via the first relay check valve 17a.
　室内絞り装置５３ａで減圧された低温低圧の二相冷媒は、負荷側熱交換器５１ａに流入する。負荷側熱交換器５１ａでは、室内ファン５２ａから供給される室内空気と低温冷媒とが熱交換される。負荷側熱交換器５１ａで加熱された中温の冷媒は、第２開閉弁２０ａを介して、中継機５０を通過し、低圧管４１に流入する。 The low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a. In the load-side heat exchanger 51a, heat is exchanged between the indoor air supplied from the indoor fan 52a and the low-temperature refrigerant. The medium-temperature refrigerant heated by the load-side heat exchanger 51a passes through the relay device 50 and flows into the low-pressure pipe 41 via the second on-off valve 20a.
　低圧管４１から熱源機１０に流入した低圧ガス冷媒は、第４逆止弁１１、絞り装置５を介して、熱源側熱交換器３へ流入する。熱源側熱交換器３では、第１室外ファン４ａ及び第２室外ファン４ｂから供給される室外空気と低温低圧冷媒とが熱交換される。熱源側熱交換器３で加熱された低温の冷媒は、四方弁２ａ、アキュムレータ６を介して圧縮機１へ再度吸入される。 The low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 flows into the heat source side heat exchanger 3 via the fourth check valve 11 and the throttle device 5 . In the heat source side heat exchanger 3, heat is exchanged between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the low-temperature, low-pressure refrigerant. The low-temperature refrigerant heated by the heat source side heat exchanger 3 is sucked again into the compressor 1 via the four-way valve 2 a and the accumulator 6 .
［冷房主体運転モード］
　図５は、図１に記載の空気調和装置１００の冷房主体運転モード時における冷媒の流れの一例を説明する図である。図５に示す例では、負荷側熱交換器３ａ及び負荷側熱交換器３ｂで冷房負荷と暖房負荷とが発生している冷房主体運転モードについて説明する。 [Cooling main operation mode]
FIG. 5 is a diagram illustrating an example of the refrigerant flow in the cooling main operation mode of the air conditioner 100 shown in FIG. In the example shown in FIG. 5, the cooling-dominant operation mode in which the load-side heat exchanger 3a and the load-side heat exchanger 3b generate a cooling load and a heating load will be described.
　図５では、この実施形態１の理解を容易にするために、冷媒の流れ方向を実線の矢印で示してある。なお、図５に示す例では、負荷側ユニット８０ａが冷房運転、負荷側ユニット８０ｂが暖房運転を行っている例を説明する。 In FIG. 5, in order to facilitate understanding of the first embodiment, the flow direction of the refrigerant is indicated by solid arrows. In the example shown in FIG. 5, an example in which the load-side unit 80a performs cooling operation and the load-side unit 80b performs heating operation will be described.
　まず、冷媒の流れについて説明する。圧縮機１は、低温及び低圧のガス冷媒を吸入し、圧縮して、高温及び高圧のガス冷媒を吐出する。圧縮機１から吐出された高温及び高圧のガス冷媒は、四方弁２ａを介して、熱源側熱交換器３に流入する。 First, the flow of the refrigerant will be explained. The compressor 1 takes in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 via the four-way valve 2a.
　熱源側熱交換器３は、第１室外ファン４ａ及び第２室外ファン４ｂから供給される室外空気と高温及び高圧のガス冷媒とを熱交換する。熱源側熱交換器３で冷却された中温及び高圧の冷媒は、絞り装置５、第２逆止弁８を介して高圧管４２に流入する。 The heat source side heat exchanger 3 exchanges heat between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the high-temperature and high-pressure gas refrigerant. The medium-temperature and high-pressure refrigerant cooled in the heat source side heat exchanger 3 flows through the expansion device 5 and the second check valve 8 into the high-pressure pipe 42 .
　中温高圧の冷媒は高圧管４２を介して中継機５０に流入し、気液分離機構１２、第１開閉弁１９ｂを介して負荷側熱交換器５１ｂに流入する。負荷側熱交換器５１ｂでは、室内ファン５２ｂから供給される室内空気と高温高圧冷媒とが熱交換される。 Medium-temperature and high-pressure refrigerant flows into the repeater 50 through the high-pressure pipe 42, and into the load-side heat exchanger 51b through the gas-liquid separation mechanism 12 and the first on-off valve 19b. In the load-side heat exchanger 51b, heat is exchanged between the indoor air supplied from the indoor fan 52b and the high-temperature, high-pressure refrigerant.
　負荷側熱交換器５１ｂで冷却された中温の冷媒は、室内絞り装置５３ｂを介し、第２中継機逆止弁１８ｂから第１中継機逆止弁１７ａに流入する。第１中継機逆止弁１７ａを介して負荷側ユニット８０ａに流入する。 The medium-temperature refrigerant cooled by the load-side heat exchanger 51b flows from the second relay check valve 18b into the first relay check valve 17a via the indoor expansion device 53b. It flows into the load side unit 80a via the first relay check valve 17a.
　室内絞り装置５３ａで減圧された低温低圧の二相冷媒は、負荷側熱交換器５１ａに流入する。負荷側熱交換器５１ａでは、室内ファン５２ａから供給される室内空気と低温冷媒とが熱交換される。 The low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a. In the load-side heat exchanger 51a, heat is exchanged between the indoor air supplied from the indoor fan 52a and the low-temperature refrigerant.
　負荷側熱交換器５１ａで加熱された中温の冷媒は、第２開閉弁２０ａを介して、中継機５０を通過し、低圧管４１に流入する。低圧管４１から熱源機１０に流入した低圧ガス冷媒は、第１逆止弁７、四方弁２ａ、アキュムレータ６を介して圧縮機１へ再度吸入される。 The medium-temperature refrigerant heated by the load-side heat exchanger 51a passes through the repeater 50 and flows into the low-pressure pipe 41 via the second on-off valve 20a. The low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 is sucked into the compressor 1 again through the first check valve 7 , the four-way valve 2 a and the accumulator 6 .
　冷房主体運転では、圧縮機１と負荷側ユニット８０ａからの吸熱量と、負荷側ユニット８０ｂと熱源側熱交換器３からの放熱量が釣り合う必要がある。冷房主体運転において暖房能力を発揮するには、暖房負荷に応じて熱源側熱交換器３の放熱量を調整する。 In cooling-dominant operation, the amount of heat absorbed from the compressor 1 and the load-side unit 80a must be balanced with the amount of heat released from the load-side unit 80b and the heat source-side heat exchanger 3. In order to exhibit the heating capacity in the cooling-dominant operation, the heat radiation amount of the heat source side heat exchanger 3 is adjusted according to the heating load.
　空気調和装置１００では、第１室外ファン４ａ及び第２室外ファン４ｂのうち、制御部６０に優先的に送風可能な第１室外ファン４ａは停止せず、第２室外ファン４ｂを停止又は第１室外ファン４ａよりも低い回転数に制御することで放熱量を調整する。第２室外ファン４ｂは、第１室外ファン４ａの回転数に対して１０％程度の回転数まで減速する。さらに熱源側熱交換器３の放熱量を抑制する場合、第２室外ファン４ｂを停止させる。 In the air conditioner 100, of the first outdoor fan 4a and the second outdoor fan 4b, the first outdoor fan 4a that can preferentially blow air to the control unit 60 does not stop, and the second outdoor fan 4b is stopped or the first outdoor fan 4b is stopped. The amount of heat dissipation is adjusted by controlling the rotation speed to be lower than that of the outdoor fan 4a. The rotation speed of the second outdoor fan 4b is reduced to about 10% of the rotation speed of the first outdoor fan 4a. Furthermore, when suppressing the heat radiation amount of the heat source side heat exchanger 3, the second outdoor fan 4b is stopped.
［冷房運転モード時の効果］
　従って、実施形態１の空気調和装置１００によれば、第１室外ファン４ａは、制御部６０に第２室外ファン４ｂよりも優先的に送風可能な位置に配置される。そして、冷房主体運転モードにおいて、制御部６０は、第１室外ファン４ａを運転し、第２室外ファン４ｂを第１ファンの回転数よりも低い回転数で運転、又は停止する。冷媒主体運転モードでは熱源側熱交換器３が凝縮器として動作し、負荷側ユニット８０ａ及び負荷側ユニット８０ｂとが冷房運転と暖房運転とが混在する。従って、第１室外ファン４ａが熱源機１０の制御部に優先的に送風することで、制御部６０の温度上昇を抑制しながら空気調和装置１００の運転を維持することができる。 [Effect in cooling operation mode]
Therefore, according to the air conditioner 100 of Embodiment 1, the first outdoor fan 4a is arranged at a position where it can blow air to the control unit 60 with priority over the second outdoor fan 4b. In the cooling main operation mode, the control unit 60 operates the first outdoor fan 4a and operates or stops the second outdoor fan 4b at a rotation speed lower than that of the first fan. In the refrigerant-dominant operation mode, the heat source side heat exchanger 3 operates as a condenser, and the load side unit 80a and the load side unit 80b perform both cooling operation and heating operation. Therefore, the first outdoor fan 4 a preferentially blows air to the control unit of the heat source device 10 , thereby suppressing the temperature rise of the control unit 60 and maintaining the operation of the air conditioner 100 .
　また、熱源側熱交換器３に送風する風量を制御することで、熱源側熱交換器３での凝縮能力を低下させ、冷媒寝こみを防止することができる。通常、ファンには最低回転数による最低風量の制約があるが、複数台あるファンの何台かを停止させることで、従来よりも下限風量を落とすことができる。また、第１室外ファン４ａを停止させないことで、制御部６０への送風量を維持し、冷却量を確保することができる。 Also, by controlling the amount of air blown to the heat source side heat exchanger 3, it is possible to reduce the condensation capacity of the heat source side heat exchanger 3 and prevent refrigerant stagnation. Normally, fans have a minimum airflow limit due to the minimum number of revolutions, but by stopping some of the multiple fans, the lower limit airflow can be lowered more than before. In addition, by not stopping the first outdoor fan 4a, it is possible to maintain the amount of air blown to the control unit 60 and secure the amount of cooling.
実施形態２．
　図６は、実施形態２に係る空気調和装置１００の回路構成の一例を模式的に記載した図である。なお、実施形態２では実施形態１との相違点を中心に説明し、実施形態１と同一部分には、同一符号を付して説明を省略するものとする。 Embodiment 2.
FIG. 6 is a diagram schematically showing an example of the circuit configuration of the air conditioner 100 according to Embodiment 2. As shown in FIG. In addition, in Embodiment 2, it demonstrates centering around difference with Embodiment 1, and the same code|symbol shall be attached|subjected to the same part as Embodiment 1, and description shall be abbreviate|omitted.
　実施形態２では、熱源側熱交換器３と絞り装置５と並列するように第２絞り装置７１と、熱源側気液分離機構７２と、を有する。 In Embodiment 2, a second expansion device 71 and a heat source side gas-liquid separation mechanism 72 are provided in parallel with the heat source side heat exchanger 3 and the expansion device 5 .
　第２絞り装置７１は、冷媒を減圧し膨張させる減圧弁又は膨張弁としての機能を有するものである。第２絞り装置７１は、例えば、電子式膨張弁等の開度が可変に制御可能なもので構成されると良い。第２絞り装置７１の片側は、四方弁２ａと熱源側熱交換器３とを接続する配管に接続され、もう片側は熱源側気液分離機構７２のガス側と接続される。 The second expansion device 71 functions as a pressure reducing valve or an expansion valve that reduces the pressure of the refrigerant and expands it. The second throttle device 71 may be composed of, for example, an electronic expansion valve whose opening degree can be variably controlled. One side of the second expansion device 71 is connected to the pipe connecting the four-way valve 2 a and the heat source side heat exchanger 3 , and the other side is connected to the gas side of the heat source side gas-liquid separation mechanism 72 .
　熱源側気液分離機構７２は、液状態の冷媒とガス状態の冷媒とを分離するものである。熱源側気液分離機構７２は、液状態の冷媒が流出する液流出側に絞り装置５と接続され、ガス状態の冷媒が通過するガス通過側に第２絞り装置７１が接続される。熱源側気液分離機構７２は、液状態の冷媒及びガス状態の冷媒が通過する混合側に第２逆止弁８と接続する配管が接続されている。 The heat source side gas-liquid separation mechanism 72 separates the liquid state refrigerant and the gas state refrigerant. The heat source side gas-liquid separation mechanism 72 is connected to the expansion device 5 on the liquid outflow side through which the liquid state refrigerant flows out, and the second expansion device 71 is connected to the gas passage side through which the gas state refrigerant passes. The heat source side gas-liquid separation mechanism 72 has a pipe connected to the second check valve 8 on the mixing side through which liquid state refrigerant and gas state refrigerant pass.
　全冷房運転モード及び冷房主体運転モードでは、熱源側熱交換器３で冷却された冷媒が絞り装置５を介して熱源側気液分離機構７２に流入する。第２絞り装置７１が開いている場合、四方弁２ａから流出したガス冷媒が第２絞り装置７１を介して熱源側気液分離機構７２に流入し、熱源側気液分離機構７２で混合した二相冷媒が第２逆止弁８に流入する。 In the cooling only operation mode and the cooling main operation mode, the refrigerant cooled by the heat source side heat exchanger 3 flows through the expansion device 5 into the heat source side gas-liquid separation mechanism 72 . When the second expansion device 71 is open, the gas refrigerant flowing out of the four-way valve 2a flows into the heat source side gas-liquid separation mechanism 72 via the second expansion device 71, and the two mixed in the heat source side gas-liquid separation mechanism 72 Phase refrigerant flows into the second check valve 8 .
　全暖房運転モード及び暖房主体運転モードでは、第４逆止弁１１から流出した低圧二相冷媒が熱源側気液分離機構７２へ流入する。第２絞り装置７１が開いている場合、熱源側気液分離機構７２で分離されたガス冷媒が第２絞り装置７１へ流入し、熱源側気液分離機構７２で分離された液冷媒が絞り装置５に流入する。 In the heating only operation mode and the heating main operation mode, the low-pressure two-phase refrigerant flowing out of the fourth check valve 11 flows into the heat source side gas-liquid separation mechanism 72 . When the second expansion device 71 is open, the gas refrigerant separated by the heat source side gas-liquid separation mechanism 72 flows into the second expansion device 71, and the liquid refrigerant separated by the heat source side gas-liquid separation mechanism 72 is separated by the expansion device. Flow into 5.
　図６に示すように、熱源側熱交換器３の冷媒側入口と冷媒側出口とを接続するバイパス経路ｂを有する。バイパス経路ｂは、熱源側熱交換器３の冷媒側入口の配管と冷媒側出口の配管とを接続する配管である。バイパス経路ｂは、冷媒の流量を調節するバイパス制御弁である絞り装置７１を有する。空気調和装置１００は、冷房主体運転モードにおいて、絞り装置７１が閉止しているとき、第１室外ファン４ａと２の第２室外ファン４ｂとは停止しない運転モードを有する。空気調和装置１００は、冷房主体運転モードにおいて、絞り装置７１が閉止していないとき、第１室外ファン４ａは運転し、第２室外ファン４ｂが停止又は減速する運転モードを有する。 As shown in FIG. 6, it has a bypass path b that connects the refrigerant side inlet and the refrigerant side outlet of the heat source side heat exchanger 3 . The bypass route b is a pipe that connects a refrigerant-side inlet pipe and a refrigerant-side outlet pipe of the heat source side heat exchanger 3 . The bypass route b has an expansion device 71, which is a bypass control valve that adjusts the flow rate of the refrigerant. The air conditioner 100 has an operation mode in which the first outdoor fans 4a and 2 of the second outdoor fan 4b do not stop when the expansion device 71 is closed in the cooling main operation mode. The air conditioner 100 has an operation mode in which the first outdoor fan 4a operates and the second outdoor fan 4b stops or slows down when the expansion device 71 is not closed in the cooling main operation mode.
［冷房主体運転モード］
　図７は、図６に記載の空気調和装置１００の冷房主体運転モード時における冷媒の流れの一例を説明する図である。図７に示す例では、負荷側熱交換器５１ａで冷房負荷と負荷側熱交換器５１ｂで暖房負荷が発生している冷房主体運転モードについて説明する。 [Cooling main operation mode]
FIG. 7 is a diagram illustrating an example of the refrigerant flow in the cooling main operation mode of the air conditioner 100 shown in FIG. In the example shown in FIG. 7, a cooling-dominant operation mode in which the load-side heat exchanger 51a generates a cooling load and the load-side heat exchanger 51b generates a heating load will be described.
　圧縮機１から吐出された高温及び高圧のガス冷媒は、四方弁２ａを介して、熱源側熱交換器３と第２絞り装置７１に流入する。熱源側熱交換器３は、第１室外ファン４ａ及び第２室外ファン４ｂから供給される室外空気と高温及び高圧のガス冷媒とを熱交換する。 The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 and the second throttle device 71 via the four-way valve 2a. The heat source side heat exchanger 3 exchanges heat between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the high-temperature and high-pressure gas refrigerant.
　熱源側熱交換器３で冷却された中温及び高圧の冷媒は、絞り装置５、第２逆止弁８を介して高圧管４２に流入する。第１室外ファン４ａ及び第２室外ファン４ｂは、高圧検出センサ３１で検出される圧力を一定値以上に保つように回転数を制御する。第２絞り装置７１は、熱源側気液分離機構７２の出口乾き度が一定以上になる開度に制御する。 The medium-temperature and high-pressure refrigerant cooled by the heat source side heat exchanger 3 flows into the high-pressure pipe 42 via the expansion device 5 and the second check valve 8 . The first outdoor fan 4a and the second outdoor fan 4b control the number of revolutions so as to keep the pressure detected by the high pressure detection sensor 31 above a certain value. The second expansion device 71 controls the opening so that the dryness at the outlet of the heat source side gas-liquid separation mechanism 72 is above a certain level.
　第２絞り装置７１が閉止している場合、第１室外ファン４ａ及び第２室外ファン４ｂは共に運転する。第２絞り装置７１が開いている場合、第２室外ファン４ｂは停止又は第１室外ファン４ａよりも低い回転数に制御することで放熱量を調整する。第２室外ファン４ｂは、第１室外ファン４ａの回転数に対して１０％程度の回転数まで回転数が下げられる。 When the second expansion device 71 is closed, both the first outdoor fan 4a and the second outdoor fan 4b operate. When the second throttle device 71 is open, the second outdoor fan 4b is stopped or controlled to have a rotational speed lower than that of the first outdoor fan 4a, thereby adjusting the amount of heat dissipation. The rotation speed of the second outdoor fan 4b is lowered to about 10% of the rotation speed of the first outdoor fan 4a.
　実施形態２によれば、実施形態１と同様の効果が得られる。 According to the second embodiment, effects similar to those of the first embodiment can be obtained.
実施形態３．
　図８は、実施形態３に係る空気調和装置１００の回路構成の一例を模式的に記載した図である。実施形態３の空気調和装置１００は、熱源機１０と、中継機５０と、負荷側ユニット８０ａ及び負荷側ユニット８０ｂと、をそれぞれ別体のユニットとして有している。中継機５０は、冷媒とは異なる熱を搬送する媒体（以下、熱媒体という）との熱交換を行って、熱伝達の中継を行う。 Embodiment 3.
FIG. 8 is a diagram schematically showing an example of the circuit configuration of the air conditioner 100 according to Embodiment 3. As shown in FIG. The air conditioner 100 of Embodiment 3 has the heat source device 10, the repeater 50, and the load side unit 80a and the load side unit 80b as separate units. The repeater 50 relays heat transfer by exchanging heat with a medium that conveys heat different from the refrigerant (hereinafter referred to as a heat medium).
［中継機５０］
　中継機５０は、中間熱交換器７３ａ及び中間熱交換器７３ｂと、ポンプ４８ａ及びポンプ４８ｂと、第１熱媒体流路切り替え装置４６ａ及び第１熱媒体流路切り替え装置４６ｂと、第２熱媒体流路切り替え装置４７ａ及び第２熱媒体流路切り替え装置４７ｂとを有している。 [Relay machine 50]
The repeater 50 includes an intermediate heat exchanger 73a and an intermediate heat exchanger 73b, a pump 48a and a pump 48b, a first heat medium flow switching device 46a and a first heat medium flow switching device 46b, and a second heat medium It has a channel switching device 47a and a second heat medium channel switching device 47b.
　中間熱交換器７３ａ及び中間熱交換器７３ｂは、冷媒を通過させる伝熱部と熱媒体を通過させる伝熱部とを有し、冷媒と熱媒体とによる媒体間の熱交換を行わせる。実施形態３は、中間熱交換器７３ａ及び中間熱交換器７３ｂは、暖房運転において凝縮器として機能し、冷媒に放熱させて熱媒体を加熱する。一方で、中間熱交換器７３ａ及び中間熱交換器７３ｂは、冷房運転において蒸発器として機能し、冷媒に吸熱させて熱媒体を冷却する。 The intermediate heat exchanger 73a and the intermediate heat exchanger 73b have a heat transfer section through which the refrigerant passes and a heat transfer section through which the heat medium passes, and perform heat exchange between the mediums by the refrigerant and the heat medium. In the third embodiment, the intermediate heat exchanger 73a and the intermediate heat exchanger 73b function as condensers in the heating operation, causing the refrigerant to radiate heat to heat the heat medium. On the other hand, the intermediate heat exchanger 73a and the intermediate heat exchanger 73b function as evaporators in the cooling operation, causing the refrigerant to absorb heat to cool the heat medium.
　熱媒体送出装置であるポンプ４８ａ及びポンプ４８ｂは、熱媒体を循環させるために加圧する。ポンプ４８ａ及びポンプ４８ｂについては、内蔵するモータ（図示せず）の回転数を一定の範囲内で変化させることで、熱媒体を送り出す流量（吐出流量）を変化させることができる。 The pumps 48a and 48b, which are heat medium delivery devices, pressurize the heat medium to circulate. As for the pumps 48a and 48b, the flow rate (discharge flow rate) of the heat medium can be changed by changing the rotational speed of the built-in motor (not shown) within a certain range.
　熱媒体送出装置であるポンプ４８ａは、中間熱交換器７３ａと第２熱媒体流路切り替え装置４７ａとを接続する配管に配置される。ポンプ４８ａによって送り出された熱媒体は中間熱交換器７３ａに流入するように配置されている。熱媒体送出装置であるポンプ４８ｂは、中間熱交換器７３ｂと第２熱媒体流路切り替え装置４７ｂとを接続する配管に配置される。ポンプ４８ｂによって送り出された熱媒体は中間熱交換器７３ｂに流入するように配置されている。 The pump 48a, which is a heat medium delivery device, is arranged in a pipe connecting the intermediate heat exchanger 73a and the second heat medium flow switching device 47a. The heat medium pumped out by the pump 48a is arranged to flow into the intermediate heat exchanger 73a. A pump 48b, which is a heat medium delivery device, is arranged in a pipe connecting the intermediate heat exchanger 73b and the second heat medium flow switching device 47b. The heat medium pumped out by the pump 48b is arranged to flow into the intermediate heat exchanger 73b.
　ポンプ４８ａは、中間熱交換器７３ａの上流側に接続され、冷媒と熱交換された熱媒体を循環させる。ポンプ４８ｂは、中間熱交換器７３ｂの上流側に接続され、冷媒と熱交換された熱媒体を循環させる。 The pump 48a is connected to the upstream side of the intermediate heat exchanger 73a and circulates the heat medium that has undergone heat exchange with the refrigerant. The pump 48b is connected to the upstream side of the intermediate heat exchanger 73b and circulates the heat medium heat-exchanged with the refrigerant.
　中継機５０は、中間熱交換器７３ａに流入する冷媒流路を切り替える冷媒流路切替装置３０ａ（１）及び冷媒流路切替装置３０ａ（２）を有する。中継機５０は、中間熱交換器７３ｂに流入する冷媒流路を切り替える冷媒流路切替装置３０ｂ（１）及び冷媒流路切替装置３０ｂ（２）を有する。 The repeater 50 has a refrigerant flow switching device 30a(1) and a refrigerant flow switching device 30a(2) that switch the refrigerant flow path flowing into the intermediate heat exchanger 73a. The repeater 50 has a refrigerant flow switching device 30b(1) and a refrigerant flow switching device 30b(2) that switch the refrigerant flow path flowing into the intermediate heat exchanger 73b.
　中継機５０は、中間熱交換器７３ａ及び中間熱交換器７３ｂへの熱媒体の流路を切り替える第１熱媒体流路切り替え装置４６ａ及び第１熱媒体流路切り替え装置４６ｂを有する。中継機５０は、中間熱交換器７３ａ及び中間熱交換器７３ｂへの熱媒体の流路を切り替える第２熱媒体流路切り替え装置４７ａ及び第２熱媒体流路切り替え装置４７ｂを有する。 The repeater 50 has a first heat medium flow switching device 46a and a first heat medium flow switching device 46b that switch the heat medium flow path to the intermediate heat exchanger 73a and the intermediate heat exchanger 73b. The repeater 50 has a second heat medium flow switching device 47a and a second heat medium flow switching device 47b for switching the heat medium flow path to the intermediate heat exchanger 73a and the intermediate heat exchanger 73b.
　また、第１熱媒体流路切り替え装置４６ａ、第１熱媒体流路切り替え装置４６ｂ、第２熱媒体流路切り替え装置４７ａ及び第２熱媒体流路切り替え装置４７ｂは、中間熱交換器７３ａ及び中間熱交換器７３ｂから負荷側熱交換器５１ａ及び負荷側熱交換器５１ｂに熱媒体を分配する。 The first heat medium flow switching device 46a, the first heat medium flow switching device 46b, the second heat medium flow switching device 47a, and the second heat medium flow switching device 47b are the intermediate heat exchanger 73a and the intermediate heat exchanger 73a. The heat medium is distributed from the heat exchanger 73b to the load side heat exchanger 51a and the load side heat exchanger 51b.
　また、中継機５０は、温度センサ２８ａ、温度センサ２９ａ、温度センサ２８ｂ及び温度センサ２９ｂを有する。温度センサ２８ａは、中間熱交換器７３ａの入口側における冷媒の温度を検出する。温度センサ２９ａは、中間熱交換器７３ａの出口側における冷媒の温度を検出する。温度センサ２８ｂは、中間熱交換器７３ａの入口側における熱媒体の温度を検出する。温度センサ２９ｂは、中間熱交換器７３ａの出口側における熱媒体の温度を検出する。 The repeater 50 also has a temperature sensor 28a, a temperature sensor 29a, a temperature sensor 28b, and a temperature sensor 29b. The temperature sensor 28a detects the temperature of the refrigerant on the inlet side of the intermediate heat exchanger 73a. The temperature sensor 29a detects the temperature of the refrigerant on the outlet side of the intermediate heat exchanger 73a. The temperature sensor 28b detects the temperature of the heat medium on the inlet side of the intermediate heat exchanger 73a. The temperature sensor 29b detects the temperature of the heat medium on the outlet side of the intermediate heat exchanger 73a.
　中継機５０は、温度センサ２６ａ、温度センサ２７ａ、温度センサ２６ｂ及び温度センサ２７ｂを有する。温度センサ２６ａは、中間熱交換器７３ｂの入口側における冷媒の温度を検出する。温度センサ２７ａは、中間熱交換器７３ｂの出口側における冷媒の温度を検出する。温度センサ２６ｂは、中間熱交換器７３ｂの入口側における熱媒体の温度を検出する。温度センサ２７ｂは、中間熱交換器７３ｂの出口側における熱媒体の温度を検出する。 The repeater 50 has a temperature sensor 26a, a temperature sensor 27a, a temperature sensor 26b, and a temperature sensor 27b. The temperature sensor 26a detects the temperature of the refrigerant on the inlet side of the intermediate heat exchanger 73b. The temperature sensor 27a detects the temperature of the refrigerant on the outlet side of the intermediate heat exchanger 73b. The temperature sensor 26b detects the temperature of the heat medium on the inlet side of the intermediate heat exchanger 73b. The temperature sensor 27b detects the temperature of the heat medium on the outlet side of the intermediate heat exchanger 73b.
　図９は、図８に記載の空気調和装置１００の冷房主体運転モード時における冷媒の流れの一例を説明する図である。図９に示す例では、負荷側熱交換器３ａ及び負荷側熱交換器３ｂで冷房負荷と暖房負荷が発生している冷房主体運転モード時の熱媒体の流れについて説明する。 FIG. 9 is a diagram explaining an example of the refrigerant flow in the cooling main operation mode of the air conditioner 100 shown in FIG. In the example shown in FIG. 9, the flow of the heat medium in the cooling main operation mode in which the load-side heat exchanger 3a and the load-side heat exchanger 3b generate a cooling load and a heating load will be described.
　ポンプ４８ａによって吐出された熱媒体は中間熱交換器７３ａに流入する。中間熱交換器７３ａでは、冷媒側の冷熱が熱媒体に伝えられ、冷却された熱媒体は第１熱媒体流路切り替え装置４６ａを介して、負荷側熱交換器５１ａに流入する。このとき、負荷側ユニット８０ａは冷房運転を行っており、負荷側熱交換器５１ａでは、室内ファン５２ａから供給される室内空気と低温熱媒体とが熱交換される。負荷側熱交換器５１ａで冷却された中温の熱媒体は、第１熱媒体流路切り替え装置４６ａを介して、再度ポンプ２２ａに吸入される。 The heat medium discharged by the pump 48a flows into the intermediate heat exchanger 73a. In the intermediate heat exchanger 73a, cold heat on the refrigerant side is transferred to the heat medium, and the cooled heat medium flows into the load side heat exchanger 51a via the first heat medium flow switching device 46a. At this time, the load-side unit 80a is performing cooling operation, and the load-side heat exchanger 51a exchanges heat between the indoor air supplied from the indoor fan 52a and the low-temperature heat medium. The medium-temperature heat medium cooled by the load-side heat exchanger 51a is again sucked into the pump 22a via the first heat medium flow switching device 46a.
　ポンプ４８ｂによって吐出された熱媒体は中間熱交換器７３ｂに流入する。中間熱交換器７３ｂでは、冷媒側の温熱が熱媒体に伝えられ、過熱された熱媒体は第１熱媒体流路切り替え装置４６ｂを介して、負荷側熱交換器５１ｂに流入する。このとき、負荷側ユニット８０ｂは暖房運転を行っており、負荷側熱交換器５１ｂでは、室内ファン５２ｂから供給される室内空気と高温熱媒体とが熱交換される。負荷側熱交換器５１ｂで冷却された中温の熱媒体は、第２熱媒体流路切り替え装置４７ｂを介して再度ポンプ２２ｂに吸入される。 The heat medium discharged by the pump 48b flows into the intermediate heat exchanger 73b. In the intermediate heat exchanger 73b, the heat on the refrigerant side is transferred to the heat medium, and the superheated heat medium flows into the load side heat exchanger 51b via the first heat medium flow switching device 46b. At this time, the load-side unit 80b is performing heating operation, and the load-side heat exchanger 51b exchanges heat between the indoor air supplied from the indoor fan 52b and the high-temperature heat medium. The medium-temperature heat medium cooled by the load-side heat exchanger 51b is again sucked into the pump 22b via the second heat medium flow switching device 47b.
　実施形態３によれば、実施形態１と同様の効果を得られる。 According to Embodiment 3, the same effect as Embodiment 1 can be obtained.
実施形態４．
　図１０は、実施形態４に係る空気調和装置１００の回路構成の一例を模式的に記載した図である。図１０に示したように、圧縮機１と中継機５０とは、低圧ガス管４３（第３冷媒配管）と、高圧ガス管４４（第１冷媒配管）と、液管４５（第２冷媒配管）と、で接続される。 Embodiment 4.
FIG. 10 is a diagram schematically showing an example of the circuit configuration of the air conditioner 100 according to Embodiment 4. As shown in FIG. As shown in FIG. 10, the compressor 1 and the repeater 50 include a low-pressure gas pipe 43 (third refrigerant pipe), a high-pressure gas pipe 44 (first refrigerant pipe), and a liquid pipe 45 (second refrigerant pipe). ) and are connected with
　熱源機１０は、四方弁２ａ及び四方弁２ｂを有する。四方弁２ａは、冷房運転における冷媒流路と暖房運転における冷媒流路とを切り替えて、凝縮器又はガスクーラとして作用する熱交換器を切り替えるものである。 The heat source device 10 has a four-way valve 2a and a four-way valve 2b. The four-way valve 2a switches between a refrigerant flow path in cooling operation and a refrigerant flow path in heating operation, and switches a heat exchanger acting as a condenser or a gas cooler.
　圧縮機１の吐出側、熱源側熱交換器３、アキュムレータ６、低圧ガス管４３が四方弁２ａを介して接続されている。なお、冷房運転時には、圧縮機１の吐出側と熱源側熱交換器３とが連通するように冷媒回路を切り替える。これにより、熱源側熱交換器３が凝縮器もしくはガスクーラとして作用するよう動作する。暖房運転時には、熱源側熱交換器３とアキュムレータ６とがそれぞれ連通するように冷媒回路を切り替える。これにより、熱源側熱交換器３が蒸発器として作用するように動作する。 The discharge side of the compressor 1, the heat source side heat exchanger 3, the accumulator 6, and the low-pressure gas pipe 43 are connected via the four-way valve 2a. During cooling operation, the refrigerant circuit is switched so that the discharge side of the compressor 1 and the heat source side heat exchanger 3 communicate with each other. As a result, the heat source side heat exchanger 3 operates as a condenser or a gas cooler. During heating operation, the refrigerant circuit is switched so that the heat source side heat exchanger 3 and the accumulator 6 are communicated with each other. As a result, the heat source side heat exchanger 3 operates as an evaporator.
　四方弁２ａ及び四方弁２ｂは、冷房主体運転モードにおいて、高圧ガス管４４に高圧ガス冷媒が流れ、液管４５に液冷媒が流れ、低圧ガス管４３は低圧冷媒が流れるように冷媒の流れ方向を切り替える。 In the cooling main operation mode, the four-way valve 2a and the four-way valve 2b are configured such that high-pressure gas refrigerant flows through the high-pressure gas pipe 44, liquid refrigerant flows through the liquid pipe 45, and low-pressure refrigerant flows through the low-pressure gas pipe 43. switch.
　四方弁２ｂは冷暖同時運転において、冷媒流路を切り替えることで、圧縮機１から吐出された高温高圧冷媒の一部を高圧ガス管４４に供給する。圧縮機１の吐出側、熱源側熱交換器３、高圧ガス管４４、アキュムレータ６が四方弁２ｂを介して接続されている。四方弁２ａ及び四方弁２ｂは、四方弁等からなっており、二方弁及び三方弁等で構成されたものであっても良い。 The four-way valve 2 b supplies part of the high-temperature, high-pressure refrigerant discharged from the compressor 1 to the high-pressure gas pipe 44 by switching the refrigerant flow path during simultaneous cooling and heating operation. The discharge side of the compressor 1, the heat source side heat exchanger 3, the high pressure gas pipe 44, and the accumulator 6 are connected via the four-way valve 2b. The four-way valve 2a and the four-way valve 2b are composed of a four-way valve or the like, and may be composed of a two-way valve, a three-way valve or the like.
　中継機５０は、第１開閉弁１９ａ及び第１開閉弁１９ｂと、第２開閉弁２０ａ及び、第２開閉弁２０ｂと、を有する。第１開閉弁１９ａ及び第１開閉弁１９ｂと、第２開閉弁２０ａ及び第２開閉弁２０ｂとは、二方弁等で構成されている。 The repeater 50 has a first on-off valve 19a and a first on-off valve 19b, and a second on-off valve 20a and a second on-off valve 20b. The first on-off valve 19a and the first on-off valve 19b, and the second on-off valve 20a and the second on-off valve 20b are configured by two-way valves or the like.
　図１１は、図１０に記載の空気調和装置１００の冷房主体運転モード時における冷媒の流れの一例を説明する図である。図１１に示す例では、負荷側熱交換器３ａ及び負荷側熱交換器３ｂで冷房負荷と暖房負荷とが発生している冷房主体運転モード時の冷媒の流れについて説明する。 FIG. 11 is a diagram illustrating an example of refrigerant flow in the cooling main operation mode of the air conditioner 100 shown in FIG. In the example shown in FIG. 11, the refrigerant flow in the cooling main operation mode in which the load-side heat exchanger 3a and the load-side heat exchanger 3b generate a cooling load and a heating load will be described.
　圧縮機１は、低温及び低圧のガス冷媒を吸入し、圧縮して、高温及び高圧のガス冷媒を吐出する。圧縮機１から吐出された高温及び高圧のガス冷媒は、四方弁２ａを介して、熱源側熱交換器３に、四方弁２ｂを介して高圧管４２に流入する。 The compressor 1 sucks in low-temperature and low-pressure gas refrigerant, compresses it, and discharges high-temperature and high-pressure gas refrigerant. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 flows into the heat source side heat exchanger 3 through the four-way valve 2a and into the high-pressure pipe 42 through the four-way valve 2b.
　熱源側熱交換器３は、第１室外ファン４ａ及び第２室外ファン４ｂから供給される室外空気と高温及び高圧のガス冷媒とを熱交換する。熱源側熱交換器３で冷却された中温及び高圧の冷媒は、絞り装置５を介して低圧ガス管４３に流入する。 The heat source side heat exchanger 3 exchanges heat between the outdoor air supplied from the first outdoor fan 4a and the second outdoor fan 4b and the high-temperature and high-pressure gas refrigerant. The medium-temperature and high-pressure refrigerant cooled by the heat source side heat exchanger 3 flows through the expansion device 5 into the low-pressure gas pipe 43 .
　中温高圧の冷媒は高圧ガス管４４を介して中継機５０に流入し、第２開閉弁２０ｂを介して負荷側熱交換器５１ｂに流入する。負荷側熱交換器５１ｂでは、室内ファン５２ｂから供給される室内空気と高温高圧冷媒とが熱交換される。 Medium-temperature and high-pressure refrigerant flows into the repeater 50 through the high-pressure gas pipe 44, and into the load-side heat exchanger 51b through the second on-off valve 20b. In the load-side heat exchanger 51b, heat is exchanged between the indoor air supplied from the indoor fan 52b and the high-temperature, high-pressure refrigerant.
　負荷側熱交換器５１ｂで冷却された中温の冷媒は、室内絞り装置５３ｂを介し、負荷側ユニット８０ａに流入する。室内絞り装置５３ａで減圧された低温低圧の二相冷媒は、負荷側熱交換器５１ａに流入する。 The medium-temperature refrigerant cooled by the load-side heat exchanger 51b flows into the load-side unit 80a via the indoor expansion device 53b. The low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a.
　室内絞り装置５３ａで減圧された低温低圧の二相冷媒は、負荷側熱交換器５１ａに流入する。負荷側熱交換器５１ａでは、室内ファン５２ａから供給される室内空気と低温冷媒とが熱交換される。 The low-temperature, low-pressure two-phase refrigerant decompressed by the indoor expansion device 53a flows into the load-side heat exchanger 51a. In the load-side heat exchanger 51a, heat is exchanged between the indoor air supplied from the indoor fan 52a and the low-temperature refrigerant.
　負荷側熱交換器５１ａで加熱された中温の冷媒は、第１開閉弁１９ａを介して、中継機５０を通過し、低圧管４１に流入する。低圧管４１から熱源機１０に流入した低圧ガス冷媒は、第１逆止弁７、四方弁２、アキュムレータ６を介して圧縮機１へ再度吸入される。 The medium-temperature refrigerant heated by the load-side heat exchanger 51a passes through the repeater 50 and flows into the low-pressure pipe 41 via the first on-off valve 19a. The low-pressure gas refrigerant that has flowed into the heat source device 10 from the low-pressure pipe 41 is sucked into the compressor 1 again via the first check valve 7 , the four-way valve 2 and the accumulator 6 .
　実施形態４によれば、実施形態１と同様の効果を得られる。 According to Embodiment 4, the same effect as Embodiment 1 can be obtained.
　実施形態は、例として提示したものであり、請求の範囲を限定することは意図していない。実施形態は、その他の様々な形態で実施されることが可能であり、実施形態の要旨を逸脱しない範囲で、種々の省略、置き換え、変更を行なうことができる。これら実施形態及びその変形は、実施形態の範囲及び要旨に含まれる。 The embodiments are presented as examples and are not intended to limit the scope of claims. Embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the gist of the embodiments. These embodiments and variations thereof are included within the scope and spirit of the embodiments.
　１　圧縮機、２ａ、２ｂ　四方弁、３　熱源側熱交換器、４ａ　第１室外ファン、４ｂ　第２室外ファン、５　絞り装置、６　液だめ機構、７　第１逆止弁、８　第２逆止弁、９　第３逆止弁、１０　熱源機、１０ａ　前壁、１０ｂ　後壁、１０ｃ　左側壁、１０ｄ　右側壁、１０ｅ　天井壁、１０ｆ　底板、１０ｇ　吸込口、１０ｈ　仕切り板、１０ｉ　吹出し口、１１　第４逆止弁、１２　気液分離機構、１３　第１冷媒間熱交換器、１４　第２冷媒間熱交換器、１５　第１中継機絞り装置、１６　第２中継機絞り装置、１７　中継機絞り装置、１７ａ、１７ｂ　第１中継機逆止弁、１８ａ、１８ｂ　第２中継機逆止弁、１９　中継機電磁弁、１９ａ、１９ｂ　第１開閉弁、２０ａ、２０ｂ　第２開閉弁、２１　吐出温度センサ、２２　吸入温度センサ、２３　外気温度センサ、２４　温度センサ、２５　中継機温度センサ、２６、２６ａ、２６ｂ、２７ａ、２７ｂ、２８ａ、２８ｂ、２９ａ、２９ｂ　温度センサ、３０ａ（１）、３０ａ（２）、３０ｂ（１）、３０ｂ（２）　冷媒流路切り替え装置、３１　高圧検出センサ、３２　低圧検出センサ、３３　高圧側液圧力センサ、３４　液流出圧力センサ、４１　低圧管、４２　高圧管、４３　低圧ガス管、４４　高圧ガス管、４５　液管、４６ａ、４６ｂ　第１熱媒体流路切り替え装置、４７ａ、４７ｂ　第２熱媒体流路切り替え装置、４８ａ、４８ｂ　ポンプ、５０　中継機、５１ａ、５１ｂ　負荷側熱交換器、５２ａ、５２ｂ　室内ファン、５３ａ、５３ｂ　室内絞り装置、５４ａ、５４ｂ　室内熱交ガス温度センサ、５５ａ、５５ｂ　室内空気温度センサ、５６ａ、５６ｂ　室内熱交液温度センサ、６０　制御部、６１　放熱板、７１　第２絞り装置、７２　熱源側気液分離機構、７３ａ、７３ｂ　中間熱交換器、８０、８０ａ、８０ｂ　負荷側ユニット、１００　空気調和装置、１０３ａ、１０３ｂ　吹出口、ｂ　バイパス経路。 1 compressor, 2a, 2b four-way valve, 3 heat source side heat exchanger, 4a first outdoor fan, 4b second outdoor fan, 5 expansion device, 6 liquid reservoir mechanism, 7 first check valve, 8 second check valve valve, 9 third check valve, 10 heat source unit, 10a front wall, 10b rear wall, 10c left side wall, 10d right side wall, 10e ceiling wall, 10f bottom plate, 10g suction port, 10h partition plate, 10i outlet, 11th 4 check valve, 12 gas-liquid separation mechanism, 13 first heat exchanger between refrigerants, 14 second heat exchanger between refrigerants, 15 first relay throttle device, 16 second relay throttle device, 17 relay throttle device , 17a, 17b first repeater check valve, 18a, 18b second repeater check valve, 19 repeater solenoid valve, 19a, 19b first on-off valve, 20a, 20b second on-off valve, 21 discharge temperature sensor, 22 intake temperature sensor, 23 outside air temperature sensor, 24 temperature sensor, 25 repeater temperature sensor, 26, 26a, 26b, 27a, 27b, 28a, 28b, 29a, 29b temperature sensor, 30a (1), 30a (2), 30b(1), 30b(2) refrigerant channel switching device, 31 high pressure detection sensor, 32 low pressure detection sensor, 33 high pressure side liquid pressure sensor, 34 liquid outflow pressure sensor, 41 low pressure pipe, 42 high pressure pipe, 43 low pressure gas pipe , 44 high-pressure gas pipe, 45 liquid pipe, 46a, 46b first heat medium flow switching device, 47a, 47b second heat medium flow switching device, 48a, 48b pump, 50 repeater, 51a, 51b load side heat exchange 52a, 52b Indoor fan 53a, 53b Indoor throttle device 54a, 54b Indoor heat exchange gas temperature sensor 55a, 55b Indoor air temperature sensor 56a, 56b Indoor heat exchange liquid temperature sensor 60 Control unit 61 Heat sink , 71 second expansion device, 72 heat source side gas-liquid separation mechanism, 73a, 73b intermediate heat exchanger, 80, 80a, 80b load side unit, 100 air conditioner, 103a, 103b outlet, b bypass route.

Claims (8)

  1. 　熱源側熱交換器が設けられた熱源側ユニットと、
    　負荷側熱交換器が設けられた複数の負荷側ユニットと、
    　前記熱源側ユニットと配管で接続され、前記熱源側ユニットから供給される冷媒の熱を前記負荷側ユニットに分配する中継ユニットと
    を有し、
    　前記熱源側ユニットは、
    　前記熱源側ユニットの動作を制御する制御部と、
    　前記熱源側熱交換器に室外空気を送風する第１ファンと、
    　前記熱源側熱交換器に室外空気を送風する第２ファンと
    を有し、
    　前記第１ファンは前記制御部に前記第２ファンよりも優先的に送風可能な位置に配置され、
    　前記熱源側熱交換器が凝縮器として動作し、冷房運転を行う前記負荷側ユニットと暖房運転を行う前記負荷側ユニットとが混在する冷房主体運転モードにおいて、前記制御部は、前記第１ファンを運転し、前記第２ファンを前記第１ファンの回転数よりも低い回転数で運転、又は停止する、
    空気調和装置。     a heat source side unit provided with a heat source side heat exchanger;
    a plurality of load-side units provided with load-side heat exchangers;
    a relay unit connected to the heat source side unit by a pipe and distributing the heat of the refrigerant supplied from the heat source side unit to the load side unit;
    The heat source side unit
    a control unit that controls the operation of the heat source side unit;
    a first fan that blows outdoor air to the heat source side heat exchanger;
    a second fan for blowing outdoor air to the heat source side heat exchanger;
    The first fan is arranged in the control unit at a position where air can be blown more preferentially than the second fan,
    In a cooling main operation mode in which the heat source side heat exchanger operates as a condenser and the load side unit that performs cooling operation and the load side unit that performs heating operation coexist, the control unit causes the first fan to operate. and operate or stop the second fan at a rotation speed lower than the rotation speed of the first fan;
    Air conditioner.
  2. 　前記熱源側ユニットは、前記冷房主体運転モードにおいて、
    　前記第１ファンを運転し、前記第２ファンを停止する、
    請求項１に記載の空気調和装置。     The heat source side unit, in the cooling main operation mode,
    operating the first fan and stopping the second fan;
    The air conditioner according to claim 1.
  3. 　前記熱源側熱交換器の容積は、
    　前記熱源側ユニットと、前記負荷側ユニットと、前記中継ユニットとに設けられた前記冷媒が流動する配管又は容器の容積と、前記熱源側ユニットと前記中継ユニットとを接続する配管の容積と、前記中継ユニットと前記負荷側ユニットとを接続する配管の容積と、の合計に対して、１５％から３０％を占める、
    請求項１又は２に記載の空気調和装置。     The volume of the heat source side heat exchanger is
    the capacity of a pipe or container through which the refrigerant flows provided in the heat source side unit, the load side unit, and the relay unit; the capacity of the pipe connecting the heat source side unit and the relay unit; occupies 15% to 30% of the total volume of the piping connecting the relay unit and the load side unit,
    The air conditioner according to claim 1 or 2.
  4. 　前記熱源側ユニットは、
    　前記制御部に接触して配置され、前記制御部から放熱させる冷却装置を有する、
    請求項１～３のいずれか１項に記載の空気調和装置。     The heat source side unit
    Having a cooling device arranged in contact with the control unit and dissipating heat from the control unit,
    The air conditioner according to any one of claims 1 to 3.
  5. 　前記熱源側ユニットは、
    　前記制御部の温度を検出する温度センサを有し、
    　前記制御部は、前記温度センサの検出温度に基づいて、前記第１ファンの回転数を制御する、
    請求項１～４のいずれか１項に記載の空気調和装置。     The heat source side unit
    Having a temperature sensor that detects the temperature of the control unit,
    The control unit controls the rotation speed of the first fan based on the temperature detected by the temperature sensor.
    The air conditioner according to any one of claims 1 to 4.
  6. 　前記熱源側ユニットは、
    　前記熱源側熱交換器の冷媒側入口と冷媒側出口とを接続するバイパス経路を有し、
    　前記バイパス経路は、
    　前記冷媒の流量を調節するバイパス制御弁を有し、
    　前記冷房主体運転モードにおいて、
    　前記バイパス制御弁が閉止しているとき、前記第１ファンと前記第２ファンとは停止しない運転モードと、
    　前記バイパス制御弁が閉止していないとき、前記第１ファンは運転し、前記第２ファンが前記第１ファンの回転数よりも低い回転数で運転、又は停止する運転モードと
    を有する、
    請求項１～５のいずれか１項に記載の空気調和装置。     The heat source side unit
    Having a bypass path connecting a refrigerant side inlet and a refrigerant side outlet of the heat source side heat exchanger,
    The bypass route is
    Having a bypass control valve that adjusts the flow rate of the refrigerant,
    In the cooling main operation mode,
    an operation mode in which the first fan and the second fan are not stopped when the bypass control valve is closed;
    and an operation mode in which the first fan operates when the bypass control valve is not closed, and the second fan operates or stops at a rotation speed lower than that of the first fan.
    The air conditioner according to any one of claims 1 to 5.
  7. 　前記熱源側ユニットは、前記熱源側熱交換器が設けられた熱源側冷媒回路を有し、
    　前記負荷側ユニットは、前記負荷側熱交換器が設けられた負荷側熱媒体回路を有し、
    　前記中継ユニットは、前記熱源側冷媒回路を流れる冷媒と前記負荷側熱媒体回路を流れる熱媒体との間で熱交換する複数の中間熱交換器を有し、
    　前記負荷側熱媒体回路において前記中間熱交換器の上流側に接続され、前記冷媒と熱交換された熱媒体を循環させるポンプと、
    　前記中間熱交換器から前記負荷側熱交換器に熱媒体を分配する流路切り替え装置とを有する、
    請求項１～６のいずれか１項に記載の空気調和装置。     The heat source side unit has a heat source side refrigerant circuit provided with the heat source side heat exchanger,
    The load-side unit has a load-side heat medium circuit provided with the load-side heat exchanger,
    The relay unit has a plurality of intermediate heat exchangers that exchange heat between the refrigerant flowing through the heat source side refrigerant circuit and the heat medium flowing through the load side heat medium circuit,
    a pump connected to the upstream side of the intermediate heat exchanger in the load-side heat medium circuit for circulating the heat medium heat-exchanged with the refrigerant;
    a flow path switching device that distributes the heat medium from the intermediate heat exchanger to the load side heat exchanger;
    The air conditioner according to any one of claims 1 to 6.
  8. 　前記熱源側ユニットと前記中継ユニットとを接続する第１冷媒配管と、
    　前記熱源側ユニットと前記中継ユニットとを接続する第２冷媒配管と、
    　前記熱源側ユニットと前記中継ユニットとを接続する第３冷媒配管と
    を有し、
    　前記熱源側ユニットは、
    　前記冷房主体運転モードにおいて、前記第１冷媒配管は高圧ガス冷媒が流れ、前記第２冷媒配管に液冷媒が流れ、前記第３冷媒配管は低圧冷媒が流れるように前記冷媒の流れ方向を切り替える流路切り替え装置を有する、
    請求項１～７のいずれか１項に記載の空気調和装置。     a first refrigerant pipe that connects the heat source side unit and the relay unit;
    a second refrigerant pipe that connects the heat source side unit and the relay unit;
    a third refrigerant pipe connecting the heat source side unit and the relay unit;
    The heat source side unit
    In the cooling main operation mode, the flow direction of the refrigerant is switched so that high-pressure gas refrigerant flows in the first refrigerant pipe, liquid refrigerant flows in the second refrigerant pipe, and low-pressure refrigerant flows in the third refrigerant pipe. having a path switching device,
    The air conditioner according to any one of claims 1 to 7.
PCT/JP2022/008598 2022-03-01 2022-03-01 Air conditioning device WO2023166558A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0599525A (en) * 1991-10-09 1993-04-20 Matsushita Refrig Co Ltd Multi-chamber type air conditioner
JPH09280632A (en) * 1996-04-09 1997-10-31 Mitsubishi Heavy Ind Ltd Outdoor unit of air conditioner
JP2004020190A (en) * 2002-06-12 2004-01-22 Lg Electronics Inc Multi-air conditioner and its operation control method
JP2011112233A (en) * 2009-11-24 2011-06-09 Mitsubishi Electric Corp Air conditioning device
JP2013024537A (en) * 2011-07-26 2013-02-04 Hitachi Appliances Inc Air conditioner

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0599525A (en) * 1991-10-09 1993-04-20 Matsushita Refrig Co Ltd Multi-chamber type air conditioner
JPH09280632A (en) * 1996-04-09 1997-10-31 Mitsubishi Heavy Ind Ltd Outdoor unit of air conditioner
JP2004020190A (en) * 2002-06-12 2004-01-22 Lg Electronics Inc Multi-air conditioner and its operation control method
JP2011112233A (en) * 2009-11-24 2011-06-09 Mitsubishi Electric Corp Air conditioning device
JP2013024537A (en) * 2011-07-26 2013-02-04 Hitachi Appliances Inc Air conditioner

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