WO2018142607A1 - Climatiseur - Google Patents

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Publication number
WO2018142607A1
WO2018142607A1 PCT/JP2017/004186 JP2017004186W WO2018142607A1 WO 2018142607 A1 WO2018142607 A1 WO 2018142607A1 JP 2017004186 W JP2017004186 W JP 2017004186W WO 2018142607 A1 WO2018142607 A1 WO 2018142607A1
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WO
WIPO (PCT)
Prior art keywords
heat
heat medium
refrigerant
unit
source side
Prior art date
Application number
PCT/JP2017/004186
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English (en)
Japanese (ja)
Inventor
一輝 大河内
祐治 本村
森本　修
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 GB1909669.2A priority Critical patent/GB2573224B/en
Priority to PCT/JP2017/004186 priority patent/WO2018142607A1/fr
Priority to JP2018565219A priority patent/JPWO2018142607A1/ja
Publication of WO2018142607A1 publication Critical patent/WO2018142607A1/fr

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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
    • F24F1/26—Refrigerant piping
    • F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0003—Exclusively-fluid systems

Definitions

  • the present invention relates to an air conditioner applied to, for example, a building multi air conditioner.
  • a refrigeration cycle circuit that circulates a heat source side refrigerant by pipe connection between an outdoor unit (outdoor unit) and a relay unit, a circulating heat source side refrigerant, a relay unit, and an indoor unit (indoor unit)
  • an air conditioner having a heat medium circulation circuit for circulating a heat medium (indoor-side refrigerant).
  • the outdoor unit and the relay unit are connected by piping
  • the relay unit and a plurality of indoor units are connected by piping.
  • a heat medium supplies warmth or cold to the indoor side, and performs air conditioning.
  • an air conditioner has been proposed in which energy is saved by reducing the conveyance power of the heat medium to be applied to a building multi-air conditioner (see, for example, Patent Document 1).
  • the reason why the air conditioner is composed of two circulation circuits is to use a refrigerant such as water that does not adversely affect the health of the users in the building as a heat medium that circulates indoors. .
  • the air conditioner of Patent Document 1 described above also includes a heat medium side switching device that switches the flow path of the heat medium in the relay unit. For this reason, the number of indoor units in the heat medium circuit is limited and is difficult to expand.
  • the air conditioning apparatus of Patent Document 1 described above performs a cooling and heating mixed operation in which some of the indoor units perform cooling and the other or some of the indoor units perform heating. It is a device that can.
  • an air conditioner as in Patent Document 1 may be required from the viewpoints of energy saving and safety as described above.
  • Patent Document 1 when an air conditioner as in Patent Document 1 is installed as it is in a facility that does not need to perform a cooling and heating mixed operation, an unnecessary device is generated among the devices that constitute the air conditioner.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an air conditioner that can easily change the circuit configuration in accordance with the application.
  • An air conditioner includes a compressor that compresses a heat source side refrigerant, a first refrigerant flow switching device that switches a circulation path of the heat source side refrigerant, a heat source side heat exchanger that exchanges heat between the heat source side refrigerant, and a heat source side refrigerant.
  • a heat source side refrigerant circulation circuit that circulates the heat source side refrigerant by pipe-connecting a heat exchanger between the heat source side and the heat source side refrigerant and a heat source different from the heat source side refrigerant
  • the compressor, the first refrigerant flow switching device and the heat source side heat exchanger are accommodated in the outdoor unit, and the heat exchanger related to heat medium and the expansion device are accommodated in the heat exchange unit, and use side heat exchange
  • the container is housed in the indoor unit
  • the refrigerant that switches the circulation path of the heat source side refrigerant between the outdoor unit and the heat exchange unit in the air conditioner that has the heat source side refrigerant circulation circuit and the heat medium circulation circuit to realize air conditioning, the refrigerant that switches the circulation path of the heat source side refrigerant between the outdoor unit and the heat exchange unit.
  • the circuit side flow path switching unit and the heat medium circuit side flow path switching unit that switches the circulation path of the heat medium between the heat exchange unit and the indoor unit are detachably installed. It is possible to easily change the circuit configuration according to the above.
  • FIG. 1 is a diagram showing an outline of an installation example of an air-conditioning apparatus according to Embodiment 1 of the present invention. Based on FIG. 1, the installation example of the air conditioning apparatus which concerns on Embodiment 1 is demonstrated.
  • the air conditioner includes a refrigerant circulation circuit that circulates the heat source side refrigerant and a heat medium circulation circuit that circulates a heat medium such as water, and performs indoor cooling or heating.
  • Each indoor unit 3 can freely select cooling or heating.
  • an air conditioner according to Embodiment 1 includes one outdoor unit 1 serving as a heat source unit, a plurality of indoor units 3 serving as indoor units, a relay unit 2, and a heat medium circuit side flow path switching unit. 23 and a heat medium adjusting unit 24.
  • the relay unit 2 includes a heat exchange unit 22 having a refrigerant circuit side flow path switching unit 21 and a heat medium heat exchanger 25, and includes a heat source side refrigerant circulating in the refrigerant circuit and a heat medium circuit. It is a unit that relays heat transfer between circulating heat media.
  • the outdoor unit 1 and the relay unit 2 are connected by a refrigerant pipe 4 serving as a heat source side refrigerant flow path.
  • the relay unit 2 and each indoor unit 3 are connected by the heat medium piping 5 used as the flow path of a heat medium.
  • a plurality of relay units 2 can be connected to one outdoor unit 1. Further, for example, a plurality of heat medium circuit side flow path switching units 23 and heat medium adjustment units 24 can be connected to the relay unit 2.
  • the relay unit 2 is configured by combining the refrigerant circuit side flow path switching unit 21 and the heat exchange unit 22, but the refrigerant circuit side flow path switching unit 21 and the heat exchange unit 22 are separately provided. It is good also as a unit.
  • Examples of the heat source side refrigerant circulating in the refrigerant circuit include a single refrigerant such as R-22 and R-134a, a pseudo-azeotropic mixed refrigerant such as R-410A and R-404A, and a non-azeotropic refrigerant such as R-407C.
  • the heat medium circulating in the heat medium circuit for example, brine (antifreeze), water, a mixed solution of brine and water, a mixed solution of an additive having high anticorrosive effect and water, or the like can be used.
  • the air conditioner of Embodiment 1 can use a highly safe thing as a heat medium. For this reason, the air conditioning apparatus according to Embodiment 1 is safe even if, for example, the heat medium leaks into the indoor space 7 via the indoor unit 3.
  • the outdoor unit 1 circulates the heat source side refrigerant with the relay unit 2 through the refrigerant pipe 4. At this time, the heat source side refrigerant exchanges heat with the heat medium in the heat medium heat exchanger 25 in the relay unit 2 described later. The heat medium is heated or cooled by heat exchange.
  • the heat medium heated or cooled in the relay unit 2 is circulated between the indoor unit 3 and the indoor unit 3 through the heat medium pipe 5 by a pump 31 described later. At this time, the heat medium exchanges heat between the indoor unit 3 and the air in a use side heat exchanger 35 in the indoor unit 3 described later. The air exchanged with the heat medium is used for heating or cooling the indoor space 7.
  • FIG. 2 is a diagram showing an example of the configuration of the air-conditioning apparatus according to Embodiment 1 of the present invention. Based on FIG. 2, the structure of the apparatus etc. which an air conditioning apparatus has is demonstrated. As described above, the outdoor unit 1 and the relay unit 2 are connected by the refrigerant pipe 4. The relay unit 2 and each indoor unit 3 are connected by a heat medium pipe 5.
  • the outdoor unit 1 includes a compressor 10, a first refrigerant flow switching device 11, a heat source side heat exchanger 12, and an accumulator 19 in a housing.
  • the compressor 10, the first refrigerant flow switching device 11, the heat source side heat exchanger 12, and the accumulator 19 are pipe-connected by the refrigerant pipe 4 and mounted.
  • the compressor 10 sucks in the heat source side refrigerant, compresses it, and discharges it in a high temperature and high pressure state.
  • the compressor 10 may be configured by, for example, an inverter compressor capable of capacity control.
  • the first refrigerant flow switching device 11 such as a four-way valve, as will be described later, is a flow of the heat source side refrigerant in the refrigerant circuit and a cooling operation mode (in a heating operation mode (a heating only operation mode or a heating main operation mode)). In the all-cooling operation mode or the cooling main operation mode), the flow of the heat source side refrigerant in the refrigerant circuit is switched.
  • the heat source side heat exchanger 12 performs heat exchange between air supplied from an outdoor blower (not shown) and the heat source side refrigerant, for example.
  • it functions as an evaporator and absorbs heat by the heat source side refrigerant.
  • the cooling operation mode it functions as a condenser or a radiator and dissipates heat to the heat source side refrigerant.
  • the accumulator 19 is provided on the suction side of the compressor 10. The accumulator 19 stores, for example, surplus refrigerant generated in a transition period when the operation changes, for example, between the heating operation mode and the cooling operation mode.
  • the outdoor unit 1 has a first connection pipe 4a, a second connection pipe 4b, and check valves 13a to 13d.
  • the refrigerant pipe 4 on the side where the heat source side refrigerant passes from the outdoor unit 1 to the relay unit 2 regardless of the operation mode The refrigerant pipe 4 on the side where the heat source side refrigerant passes from the relay unit 2 to the outdoor unit 1 can be made constant.
  • the first connection pipe 4a, the second connection pipe 4b, and the check valves 13a to 13d are not essential devices for the air-conditioning apparatus according to Embodiment 1, and therefore can be omitted.
  • the indoor unit 3 has a use side heat exchanger 35 in the housing.
  • the use side heat exchanger 35 is connected to the heat medium pipe 5, and the heat medium passes therethrough.
  • the use side heat exchanger 35 performs heat exchange between air supplied from an indoor fan (not shown) and the heat medium. If the warm heat medium passes, the air is heated and the indoor space 7 is heated. Moreover, if a cold heat medium passes, air will be cooled and the indoor space 7 will be cooled.
  • FIG. 2 shows an example in which four indoor units 3 and relay units 2 are connected. It is illustrated as an indoor unit 3a, an indoor unit 3b, an indoor unit 3c, and an indoor unit 3d from the top of the page.
  • the use side heat exchanger 35 also has a use side heat exchanger 35a, a use side heat exchanger 35b, a use side heat exchanger 35c, and a use side heat exchanger from the upper side of the drawing. 35d.
  • the number of indoor units 3 connected to the relay unit 2 is not limited to the four units shown in FIG.
  • the relay unit 2 includes the refrigerant circuit side flow path switching unit 21 and the heat exchange unit 22.
  • the refrigerant circuit side flow path switching unit 21 is a unit obtained by modularizing a device that switches the flow path of the heat source side refrigerant passing through the relay unit 2.
  • the refrigerant circuit side channel switching unit 21 includes an opening / closing device 27, an opening / closing device 29, and a second refrigerant channel switching device 28 (second refrigerant channel switching device 28a, second refrigerant channel switching device 28b). .
  • the opening / closing device 27 and the opening / closing device 29 are configured to be opened / closed by energization, such as an electromagnetic valve, for example, and the opening / closing is controlled according to the operation mode, and the refrigerant flow path in the refrigerant circulation circuit is controlled. Switch.
  • the opening / closing device 27 is provided in the refrigerant pipe 4 on the inlet side of the heat source side refrigerant in the relay unit 2.
  • the opening / closing device 29 is provided in a pipe (bypass pipe) connecting the refrigerant pipe 4 on the inlet side of the refrigerant on the heat source side and the refrigerant pipe 4 on the outlet side in the relay unit 2.
  • the two second refrigerant flow switching devices 28 are constituted by, for example, four-way valves.
  • the second refrigerant flow switching device 28 switches the flow of the heat source side refrigerant so that the heat medium heat exchanger 25 can be used as a condenser or an evaporator according to the operation mode.
  • the second refrigerant flow switching device 28a is provided in a portion on the downstream side of the heat medium heat exchanger 25a in the flow of the heat source side refrigerant in the cooling operation mode.
  • the second refrigerant flow switching device 28b is provided in a portion on the downstream side of the heat medium heat exchanger 25b in the flow of the heat source side refrigerant in the cooling only operation mode.
  • the heat exchange unit 22 is a unit having a device related to heat transfer between the heat source side refrigerant circulating in the refrigerant circulation circuit and the heat medium circulating in the heat medium circulation circuit.
  • the heat exchange unit 22 includes two heat medium heat exchangers 25 (heat medium heat exchanger 25a and heat medium heat exchanger 25b), two expansion devices 26 (expansion device 26a and expansion device 26b), and two pumps 31 ( A pump 31a and a pump 31b).
  • the heat medium heat exchanger 25 (heat medium heat exchanger 25a, heat medium heat exchanger 25b) performs heat exchange between the heat source side refrigerant and the heat medium, and transfers heat from the heat source side refrigerant side to the heat medium side.
  • the heat medium heat exchanger 25 functions as a condenser or a radiator, and dissipates heat to the heat source side refrigerant.
  • it functions as an evaporator and makes a heat source side refrigerant
  • the heat medium heat exchanger 25a is provided between the expansion device 26a and the second refrigerant flow switching device 28a in the refrigerant circulation circuit.
  • the heat medium heat exchanger 25a functions as an evaporator and cools the heat medium in the all-cooling operation mode and the cooling / heating mixed operation mode (cooling main operation mode, heating main operation mode). In the heating only operation mode, it functions as a condenser or a radiator and heats the heat medium.
  • the heat medium heat exchanger 25b is provided between the expansion device 26b and the second refrigerant flow switching device 28b in the refrigerant circulation circuit. In the heating only operation mode and the cooling / heating mixed operation mode, the heating medium functions as a condenser or a heat radiator. Further, in the cooling only operation mode, it functions as an evaporator and cools the heat medium.
  • the two expansion devices 26 (the expansion device 26a and the expansion device 26b) function as a pressure reducing valve and an expansion valve, and are devices for expanding the pressure by reducing the heat source side refrigerant.
  • the expansion device 26a is provided on the upstream side of the heat medium heat exchanger 25a in the flow of the heat source side refrigerant in the cooling operation mode.
  • the expansion device 26b is provided on the upstream side of the heat medium heat exchanger 25b in the flow of the heat source side refrigerant during the cooling operation.
  • the expansion device 26 may be a device such as an electronic expansion valve that can control the opening degree to an arbitrary size and can arbitrarily adjust the flow rate of the heat source side refrigerant.
  • the two pumps 31 suck the heat medium, pressurize it, and circulate it through the heat medium circulation circuit.
  • the pump 31 a is provided in the heat medium pipe 5 between the heat medium heat exchanger 25 a and the second heat medium flow switching device 33.
  • the pump 31 b is provided in the heat medium pipe 5 between the heat medium heat exchanger 25 b and the second heat medium flow switching device 33.
  • the pump 31 is preferably a device that is configured by a capacity-controllable pump or the like and that can adjust the flow rate according to the size of the thermal load on the indoor unit 3 side.
  • the heat medium circuit side flow path switching unit 23 is a unit obtained by modularizing a device that switches the flow path of the heat medium passing through the relay unit 2.
  • the heat medium circuit side flow switching unit 23 according to the first embodiment includes four first heat medium flow switching devices 32 (first heat medium flow switching device 32a to first heat medium flow switching device 32d) and four. There are two second heat medium flow switching devices 33 (second heat medium flow switching device 33a to second heat medium flow switching device 33d).
  • the first heat medium flow switching device 32 is constituted by, for example, a three-way valve.
  • the first heat medium flow switching device 32 switches the heat medium flow channel in the heat medium circulation circuit in conjunction with the second heat medium flow switching device 33.
  • the first heat medium flow switching device 32 is connected to the use side heat exchanger 35 of the indoor unit 3 via the heat medium heat exchanger 25a, the heat medium heat exchanger 25b, and the heat medium flow rate adjustment device 34, respectively. It is provided on the heat medium outflow side of the side heat exchanger 35. Then, the first heat medium flow switching device 32 switches so that the heat medium flowing out from the indoor unit 3 flows to the heat medium heat exchanger 25a or the heat medium heat exchanger 25b.
  • the first heat medium flow switching device 32 is installed according to each indoor unit 3. In FIG.
  • the first heat medium flow switching device 32a the first heat medium flow switching device 32b, the first heat medium flow switching device 32c, and the first heat medium corresponding to each indoor unit 3 from the upper side of the drawing.
  • Four first heat medium flow switching devices 32 of the flow switching device 32d are shown.
  • the switching of the flow path in the first heat medium flow switching device 32 includes not only selectively switching between the heat medium heat exchanger 25a or the heat medium heat exchanger 25b but also switching the flow rate. .
  • the second heat medium flow switching device 33 is composed of, for example, a three-way valve.
  • the second heat medium flow switching device 33 switches the heat medium flow channel in the heat medium circulation circuit in conjunction with the first heat medium flow switching device 32.
  • the second heat medium flow switching device 33 is connected to the heat medium heat exchanger 25 a, the heat medium heat exchanger 25 b, and the use side heat exchanger 35 of the indoor unit 3, and the heat medium flow into the use side heat exchanger 35.
  • the second heat medium flow switching device 33 switches the heat medium flowing out of the heat medium heat exchanger 25a and the heat medium heat exchanger 25b to flow into the indoor unit 3.
  • the second heat medium flow switching device 33 is installed according to each indoor unit 3. In FIG.
  • Four second heat medium flow switching devices 33 of the flow switching device 33d are shown. Further, the switching of the flow path in the second heat medium flow switching device 33 not only selectively switches the heat medium inflow from the heat medium heat exchanger 25a or the heat medium heat exchanger 25b, but also the ratio of the inflow Including the case of switching.
  • the heat medium adjusting unit 24 is a unit obtained by modularizing a device that adjusts the amount of heat medium flowing into and out of each indoor unit 3 through the relay unit 2.
  • the heat medium adjustment unit 24 according to the first embodiment includes four heat medium flow control devices 34 (heat medium flow control devices 34a to 34d).
  • the heat medium flow control device 34 includes a two-way valve that can control the opening area.
  • the heat medium flow control device 34 controls the flow rate of the heat medium flowing through the heat medium pipe 5.
  • the heat medium flow control device 34 is connected between the use side heat exchanger 35 and the first heat medium flow switching device 32. Then, the heat medium flow control device 34 adjusts the amount of the heat medium that passes through the indoor unit 3 based on the temperature of the heat medium flowing into the indoor unit 3 and the temperature of the heat medium flowing out.
  • the heat exchange can be performed according to the indoor load.
  • the heat medium flow control device 34 is installed according to each indoor unit 3.
  • a heat medium flow control device 34a corresponding to the indoor unit 3
  • a heat medium flow control device 34b corresponding to the indoor unit 3
  • a heat medium flow control device 34c corresponding to the indoor unit 3
  • a heat medium flow control device 34d are shown from the upper side of the drawing.
  • the heat medium flow control device 34 fully closes the heat medium flow control device 34 to supply the heat medium to the indoor unit 3. Can be stopped.
  • the heat medium flow control device 34 may be provided between the use side heat exchanger 35 and the second heat medium flow switching device 33. When the first heat medium flow switching device 32 or the second heat medium flow switching device 33 can substitute for the function of the heat medium flow control device 34, the installation of the heat medium flow control device 34 may be omitted.
  • the relay unit 2 is provided with two temperature sensors 40 (a temperature sensor 40a and a temperature sensor 40b).
  • Information (temperature information) detected by the temperature sensor 40 is sent to a control device (not shown) that controls the overall operation of the air conditioner, and the driving frequency of the compressor 10, the rotational speed of the blower not shown, It is used for control of switching of the 1 refrigerant flow switching device 11, driving frequency of the pump 31, switching of the second refrigerant flow switching device 28, switching of the flow path of the heat medium, adjustment of the heat medium flow rate of the indoor unit 3, etc. Will be.
  • the two temperature sensors 40 detect the temperature of the heat medium flowing out from the heat medium heat exchanger 25, that is, the temperature of the heat medium at the outlet of the heat medium heat exchanger 25, and may be composed of, for example, a thermistor.
  • the temperature sensor 40a is provided in the heat medium pipe 5 on the inlet side of the pump 31a.
  • the temperature sensor 40b is provided in the heat medium pipe 5 on the inlet side of the pump 31b.
  • FIG. 3 is a diagram showing a refrigerant flow in the heating only operation mode of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • FIG. 3 illustrates an example in which all the indoor units 3 perform heating.
  • the thick line in the refrigerant circuit indicates the refrigerant pipe 4 through which the heat source side refrigerant passes in the heating only operation mode.
  • the direction in which the heat source side refrigerant flows is indicated by a solid line arrow
  • the direction in which the heat medium flows is indicated by a broken line arrow.
  • the compressor 10 compresses the heat source side refrigerant and discharges the high temperature and high pressure gas heat source side refrigerant.
  • the discharged high-temperature and high-pressure refrigerant passes through the first refrigerant flow switching device 11 and the check valve 13c, flows out of the outdoor unit 1, passes through the refrigerant pipe 4 outside the outdoor unit 1, and passes through the relay unit 2.
  • the first refrigerant flow switching device 11 flows out of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 out of the outdoor unit 1 without passing through the heat source side heat exchanger 12 in the outdoor unit 1. Has been switched.
  • the gaseous heat source side refrigerant that has flowed into the relay unit 2 is branched and flows into the second refrigerant flow switching device 28a and the second refrigerant flow switching device 28b, respectively.
  • the second refrigerant flow switching device 28a and the second refrigerant flow switching device 28b are each switched to the heating side.
  • the opening / closing device 27 is closed.
  • the gaseous heat-source-side refrigerant that has passed through the second refrigerant flow switching devices 28a and 28b passes through the heat medium heat exchangers 25a and 25b, and at this time, heat exchange with the heat medium is performed.
  • the heat-source-side refrigerant that has passed through the heat medium heat exchangers 25a and 25b becomes a high-temperature and high-pressure liquid refrigerant.
  • the heat-source-side refrigerant that has become a high-temperature and high-pressure liquid refrigerant is decompressed by passing through the expansion devices 26a and 26b, and becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant.
  • the low-temperature low-pressure gas-liquid two-phase heat-source-side refrigerant that has passed through the expansion devices 26 a and 26 b merges and flows out from the relay unit 2. At this time, the opening / closing device 29 is closed.
  • the heat-source-side refrigerant that has flowed out of the relay unit 2 passes through the external refrigerant pipe 4 and flows into the outdoor unit 1.
  • the low-temperature and low-pressure heat source side refrigerant flowing into the outdoor unit 1 passes through the check valve 13b and passes through the heat source side heat exchanger 12. At this time, heat exchange with the air in the outdoor space 6 is performed, and the heat source side refrigerant is a low-temperature and low-pressure gas.
  • the heat source side refrigerant passes through the first refrigerant flow switching device 11 and the accumulator 19 and is sucked into the compressor 10.
  • the heat medium exchanges heat with a high-temperature and high-pressure gaseous refrigerant in the heat medium heat exchanger 25a and the heat medium heat exchanger 25b to become a high-temperature heat medium.
  • the heat medium heated to high temperature in the heat medium heat exchangers 25a and 25b is conveyed to the indoor unit 3 by pumps 31a and 31b connected to the heat medium heat exchangers 25a and 25b, respectively.
  • the transported heat medium passes through the second heat medium flow switching device 33 of the heat medium circuit side flow switching unit 23 connected to each indoor unit 3, and each indoor unit 3 is heated by the heat medium flow control device 34.
  • the flow rate of the heat medium flowing into the is adjusted.
  • the second heat medium flow switching device 33 can supply the heat medium conveyed from both the heat medium heat exchanger 25a and the heat medium heat exchanger 25b to the heat medium flow control device 34 and the indoor unit 3.
  • the opening degree is adjusted according to the intermediate opening degree or the temperature of the heat medium at the heat medium outlet of the heat medium heat exchanger 25a and the heat medium heat exchanger 25b.
  • the heat medium flowing into the indoor unit 3 connected by the heat medium pipe 5 is heated by exchanging heat with the indoor air in the indoor space 7 by the use side heat exchanger 35.
  • the heat medium exchanged by the use-side heat exchanger 35 is conveyed into the relay unit 2 through the heat medium pipe 5 and the heat medium flow control device 34.
  • the transported heat medium flows into the heat medium heat exchangers 25 a and 25 b through the first heat medium flow switching device 32 of the heat medium circuit side flow switching unit 23 and is supplied to the indoor space 7 through the indoor unit 3.
  • the amount of heat received is received from the refrigerant side, and conveyed again to the pump 31a and the pump 31b.
  • FIG. 4 is a diagram showing a refrigerant flow in the heating main operation mode of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the thick line in the refrigerant circuit indicates the refrigerant pipe 4 through which the heat source side refrigerant passes in the heating only operation mode.
  • the direction in which the heat source side refrigerant flows is indicated by a solid line arrow, and the direction in which the heat medium flows is indicated by a broken line arrow.
  • the compressor 10 compresses the heat source side refrigerant and discharges the high temperature and high pressure gas heat source side refrigerant.
  • the discharged high-temperature and high-pressure refrigerant passes through the first refrigerant flow switching device 11 and the check valve 13c, flows out of the outdoor unit 1, passes through the refrigerant pipe 4 outside the outdoor unit 1, and passes through the relay unit 2.
  • the first refrigerant flow switching device 11 switches so that the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 flows out of the outdoor unit 1 without passing through the heat source side heat exchanger 12 in the outdoor unit 1. It has been.
  • the heat source side refrigerant becomes a high-temperature and high-pressure liquid refrigerant, and the heat medium is heated.
  • the heat-source-side refrigerant that has become a high-temperature and high-pressure liquid refrigerant is decompressed by passing through the expansion device 26b, and becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant.
  • the expansion device 26b is controlled so that the degree of supercooling of the outlet refrigerant of the heat medium heat exchanger 25b becomes a target value.
  • the heat-source-side refrigerant that has become a low-temperature and low-pressure two-phase refrigerant passes through the expansion device 26a, flows into the heat medium heat exchanger 25a, performs heat exchange with the heat medium, and cools the heat medium.
  • the expansion device 26a is fully opened.
  • the opening / closing device 29 and the opening / closing device 27 are closed. Then, the refrigerant that has passed through the second refrigerant flow switching device 28 a flows out from the relay unit 2.
  • the heat-source-side refrigerant that has flowed out of the relay unit 2 passes through the external refrigerant pipe 4 and flows into the outdoor unit 1.
  • the low-temperature and low-pressure heat source side refrigerant flowing into the outdoor unit 1 passes through the check valve 13b and passes through the heat source side heat exchanger 12. At this time, heat exchange with the air in the outdoor space 6 is performed, and the heat source side refrigerant is a low-temperature and low-pressure gas.
  • the heat source side refrigerant passes through the first refrigerant flow switching device 11 and the accumulator 19 and is sucked into the compressor 10.
  • the heat medium is cooled in the heat medium heat exchanger 25a and heated in the heat medium heat exchanger 25b.
  • the heat medium cooled in the heat medium heat exchanger 25a is conveyed by the pump 31a.
  • the heated heat medium is conveyed by the pump 31b.
  • the transported heat medium passes through the second heat medium flow switching device 33 connected to each indoor unit 3.
  • the heat medium flow control device 34 adjusts the flow rate of the heat medium flowing into each indoor unit 3.
  • each second heat medium flow switching device 33 when the corresponding indoor unit 3 is heating, switching is performed so as to communicate with the flow path to which the heat medium heat exchanger 25b and the pump 31b are connected. It is done. Further, when the corresponding indoor unit 3 is performing cooling, the indoor unit 3 is switched so as to communicate with the flow path to which the heat medium heat exchanger 25a and the pump 31a are connected. Then, the heat medium flows out of the relay unit 2, passes through the heat medium pipe 5 outside the relay unit 2, and flows into the indoor unit 3.
  • the heat medium flowing into the indoor unit 3 undergoes heat exchange with the air in the indoor space 7 in the use side heat exchanger 35. Indoor heating or cooling is performed by the air in the indoor space 7 subjected to heat exchange.
  • the heat medium subjected to heat exchange flows out of the indoor unit 3.
  • the heat medium flowing out of the indoor unit 3 passes through the heat medium pipe 5 outside the relay unit 2 and flows into the relay unit 2.
  • the heat medium flowing into the relay unit 2 passes through the first heat medium flow switching device 32.
  • first heat medium flow switching device 32 when the corresponding indoor unit 3 is heating, switching is performed so as to communicate with the flow path to which the heat medium heat exchanger 25b and the pump 31b are connected. It is done. Further, when the corresponding indoor unit 3 is performing cooling, the indoor unit 3 is switched so as to communicate with the flow path to which the heat medium heat exchanger 25a and the pump 31a are connected.
  • the heat medium that has passed through each flow path is heated or cooled by heat exchange in the heat medium heat exchanger 25.
  • FIG. 5 is a diagram showing a refrigerant flow in the cooling only operation mode of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • FIG. 5 illustrates an example in which all the indoor units 3 perform cooling.
  • the thick line in the refrigerant circulation circuit indicates the refrigerant pipe 4 through which the heat source side refrigerant passes in the heating only operation mode.
  • the direction in which the heat source side refrigerant flows is indicated by a solid line arrow
  • the direction in which the heat medium flows is indicated by a broken line arrow.
  • the compressor 10 compresses the heat source side refrigerant and discharges the high temperature and high pressure gas heat source side refrigerant.
  • the discharged high-temperature and high-pressure refrigerant passes through the first refrigerant flow switching device 11 and passes through the heat source side heat exchanger 12.
  • the heat source side refrigerant exchanges heat with the air in the outdoor space 6 by passing through the heat source side heat exchanger 12.
  • the heat source side refrigerant is a liquid refrigerant.
  • the heat-source-side refrigerant that has passed through the heat-source-side heat exchanger 12 passes through the check valve 13a and flows out of the outdoor unit 1.
  • the heat source side refrigerant flowing out of the outdoor unit 1 passes through the refrigerant pipe 4 outside the outdoor unit 1 and flows into the relay unit 2.
  • the first refrigerant flow switching device 11 is switched so that the high-temperature and high-pressure gas heat source-side refrigerant discharged from the compressor 10 passes through the heat source-side heat exchanger 12.
  • the heat-source-side refrigerant that has flowed into the relay unit 2 branches after passing through the opening / closing device 27, and then passes through the expansion device 26a and the expansion device 26b.
  • the heat-source-side refrigerant that has passed through the expansion devices 26a and 26b is decompressed, becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant, and passes through the heat medium heat exchanger 25a and the heat medium heat exchanger 25b.
  • the heat source side refrigerant that has passed through the heat medium heat exchanger 25a and the heat medium heat exchanger 25b undergoes heat exchange with the heat medium.
  • the expansion device 26a and the expansion device 26b are controlled so that the degree of superheat of the heat source side refrigerant on the heat medium outflow side of the heat medium heat exchanger 25a and the heat medium heat exchanger 25b becomes a target value.
  • the opening / closing device 29 is closed.
  • the heat-source-side refrigerant that has passed through the heat medium heat exchangers 25a and 25b merges after passing through the second refrigerant flow switching devices 28a and 28b, and flows out from the relay unit 2.
  • the second refrigerant flow switching device 28a and the second refrigerant flow switching device 28b are each switched to the cooling side.
  • the heat-source-side refrigerant that has flowed out of the relay unit 2 passes through the external refrigerant pipe 4 and flows into the outdoor unit 1.
  • the low-temperature and low-pressure heat source side refrigerant flowing into the outdoor unit 1 passes through the check valve 13c, the first refrigerant flow switching device 11 and the accumulator 19 and is compressed by the low-temperature and low-pressure heat source side refrigerant flowing into the outdoor unit 1. Inhaled by the machine 10.
  • the heat medium exchanges heat with the low-temperature and low-pressure heat source side refrigerant in the heat medium heat exchanger 25a and the heat medium heat exchanger 25b, and becomes a low-temperature heat medium.
  • the heat medium that has been lowered in temperature by the heat medium heat exchangers 25a and 25b is transferred to the indoor unit 3 by pumps 31a and 31b connected to the heat medium heat exchangers 25a and 25b, respectively.
  • the transported heat medium passes through the second heat medium flow switching device 33 of the heat medium circuit side flow switching unit 23 connected to each indoor unit 3, and each indoor unit 3 is heated by the heat medium flow control device 34.
  • the flow rate of the heat medium flowing into the is adjusted.
  • the second heat medium flow switching device 33 can supply the heat medium conveyed from both the heat medium heat exchanger 25a and the heat medium heat exchanger 25b to the heat medium flow control device 34 and the indoor unit 3.
  • the opening degree is adjusted according to the intermediate opening degree or the temperature of the heat medium at the heat medium outlet of the heat medium heat exchanger 25a and the heat medium heat exchanger 25b.
  • the heat medium flowing into the indoor unit 3 connected by the heat medium pipe 5 is cooled by exchanging heat with the indoor air in the indoor space 7 by the use side heat exchanger 35.
  • the heat medium exchanged by the use-side heat exchanger 35 is conveyed into the relay unit 2 through the heat medium pipe 5 and the heat medium flow control device 34.
  • the transported heat medium flows into the heat medium heat exchanger 25a and the heat medium heat exchanger 25b through the first heat medium flow switching device 32 of the heat medium circuit side flow path switching unit 23, and passes through the indoor unit 3 to the room.
  • the amount of heat supplied to the space 7 is received from the refrigerant side and again conveyed to the pump 31a and the pump 31b.
  • FIG. 6 is a diagram showing a refrigerant flow in the cooling main operation mode of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the thick line in the refrigerant circuit indicates the refrigerant pipe 4 through which the heat source side refrigerant passes in the heating only operation mode.
  • the direction in which the heat source side refrigerant flows is indicated by a solid line arrow, and the direction in which the heat medium flows is indicated by a broken line arrow.
  • the compressor 10 compresses the heat source side refrigerant and discharges the high temperature and high pressure gas heat source side refrigerant.
  • the discharged high-temperature and high-pressure refrigerant passes through the first refrigerant flow switching device 11 and passes through the heat source side heat exchanger 12.
  • the heat source side refrigerant exchanges heat with the air in the outdoor space 6 by passing through the heat source side heat exchanger 12.
  • the heat source side refrigerant is a liquid refrigerant.
  • the heat-source-side refrigerant that has passed through the heat-source-side heat exchanger 12 passes through the check valve 13a and flows out of the outdoor unit 1.
  • the heat source side refrigerant flowing out of the outdoor unit 1 passes through the refrigerant pipe 4 outside the outdoor unit 1 and flows into the relay unit 2.
  • the first refrigerant flow switching device 11 is switched so that the high-temperature and high-pressure gas heat source-side refrigerant discharged from the compressor 10 passes through the heat source-side heat exchanger 12.
  • the heat-source-side refrigerant that has flowed into the relay unit 2 passes through the second refrigerant flow switching device 28b and flows into the heat medium heat exchanger 25b. At this time, the second refrigerant flow switching device 28a is switched to the cooling-side flow path. The second refrigerant flow switching device 28b is switched to the heating-side flow path.
  • the heat-source-side refrigerant that has flowed into the heat medium heat exchanger 25b exchanges heat with the heat medium.
  • the heat source side refrigerant becomes a high-temperature and high-pressure liquid refrigerant, and the heat medium is heated.
  • the heat-source-side refrigerant that has become a high-temperature and high-pressure liquid refrigerant is decompressed by passing through the expansion device 26b, and becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant.
  • the expansion device 26b is controlled so that the degree of superheat of the heat medium at the heat medium outlet of the heat medium heat exchanger 25a becomes a target value.
  • the refrigerant that has become a low-temperature and low-pressure two-phase refrigerant passes through the heat medium heat exchanger 25a, exchanges heat with the heat medium in the refrigerant-water heat exchanger, and then flows out from the relay unit 2.
  • the opening / closing device 29 is closed.
  • the heat-source-side refrigerant that has flowed out of the relay unit 2 passes through the external refrigerant pipe 4 and flows into the outdoor unit 1.
  • the low-temperature and low-pressure heat source side refrigerant flowing into the outdoor unit 1 passes through the check valve 13c, the first refrigerant flow switching device 11 and the accumulator 19 and is compressed by the low-temperature and low-pressure heat source side refrigerant flowing into the outdoor unit 1. Inhaled by the machine 10.
  • the heat medium is cooled in the heat medium heat exchanger 25a and heated in the heat medium heat exchanger 25b.
  • the heat medium cooled in the heat medium heat exchanger 25a is conveyed by the pump 31a.
  • the heated heat medium is conveyed by the pump 31b.
  • the transported heat medium passes through the second heat medium flow switching device 33 connected to each indoor unit 3.
  • the heat medium flow control device 34 adjusts the flow rate of the heat medium flowing into each indoor unit 3.
  • each second heat medium flow switching device 33 when the corresponding indoor unit 3 is heating, switching is performed so as to communicate with the flow path to which the heat medium heat exchanger 25b and the pump 31b are connected. It is done. Further, when the corresponding indoor unit 3 is performing cooling, the indoor unit 3 is switched so as to communicate with the flow path to which the heat medium heat exchanger 25a and the pump 31a are connected. Then, the heat medium flows out of the relay unit 2, passes through the heat medium pipe 5 outside the relay unit 2, and flows into the indoor unit 3.
  • the heat medium flowing into the indoor unit 3 undergoes heat exchange with the air in the indoor space 7 in the use side heat exchanger 35. Indoor heating or cooling is performed by the air in the indoor space 7 subjected to heat exchange.
  • the heat medium subjected to heat exchange flows out of the indoor unit 3.
  • the heat medium flowing out of the indoor unit 3 passes through the heat medium pipe 5 outside the relay unit 2 and flows into the relay unit 2.
  • the heat medium flowing into the relay unit 2 passes through the first heat medium flow switching device 32.
  • first heat medium flow switching device 32 when the corresponding indoor unit 3 is heating, switching is performed so as to communicate with the flow path to which the heat medium heat exchanger 25b and the pump 31b are connected. It is done. Further, when the corresponding indoor unit 3 is performing cooling, the indoor unit 3 is switched so as to communicate with the flow path to which the heat medium heat exchanger 25a and the pump 31a are connected.
  • the heat medium that has passed through each flow path is heated or cooled by heat exchange in the heat medium heat exchanger 25.
  • FIG. 7 is a diagram illustrating another form of the air-conditioning apparatus according to Embodiment 1 of the present invention.
  • the air conditioner may be configured as shown in FIG. it can.
  • FIG. 7 a case where the heat exchange unit 22 having one heat medium heat exchanger 25 and one expansion device 26 is provided in the relay unit 2 will be described.
  • the relay unit 2 of the air conditioner of FIG. 7 is configured without the refrigerant circuit side flow path switching unit 21 installed in the air conditioner of FIG. Therefore, on the refrigerant circuit side, the refrigerant pipe 4 outside the relay unit 2 is directly connected to the heat medium heat exchanger 25 and the expansion device 26 of the heat exchange unit 22. On the heat medium circuit side, the heat medium circuit side flow path switching unit 23 installed in the air conditioner of FIG. 2 is not installed. Therefore, on the refrigerant circulation circuit side, the refrigerant pipe 4 outside the heat medium adjusting unit 24 and the relay unit 2 is directly connected to the heat medium heat exchanger 25 and the pump 31 included in the heat exchange unit 22. It becomes. Installation of the first connection pipe 4a, the second connection pipe 4b, and the check valves 13a to 13d in the outdoor unit 1 is omitted.
  • the units in the relay unit 2 By configuring the units in the relay unit 2 with necessary units depending on the specifications and applications of the operation of the air conditioner, it is possible to share equipment in the air conditioners having different specifications and applications. . Moreover, since the conveyance power of the heat medium can be reduced, energy saving can be achieved. Furthermore, user safety can be taken into account by using a heat medium such as water.
  • FIG. 8 is a diagram showing a refrigerant flow in the heating operation mode of the air conditioner according to another embodiment of the present invention.
  • the direction in which the heat source side refrigerant flows is indicated by a solid line arrow
  • the direction in which the heat medium flows is indicated by a broken line arrow.
  • the compressor 10 compresses the heat source side refrigerant and discharges the high temperature and high pressure gas heat source side refrigerant.
  • the discharged high-temperature and high-pressure refrigerant passes through the first refrigerant flow switching device 11, flows out of the outdoor unit 1, passes through the refrigerant pipe 4 outside the outdoor unit 1, and flows into the relay unit 2.
  • the first refrigerant flow switching device 11 flows out of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 10 out of the outdoor unit 1 without passing through the heat source side heat exchanger 12 in the outdoor unit 1. Has been switched.
  • the gaseous heat source side refrigerant flowing into the relay unit 2 passes through the heat medium heat exchanger 25a. At this time, heat exchange with the heat medium is performed.
  • the heat-source-side refrigerant that has passed through the heat medium heat exchanger 25a becomes a high-temperature and high-pressure liquid refrigerant.
  • the heat-source-side refrigerant that has become a high-temperature and high-pressure liquid refrigerant is decompressed by passing through the expansion device 26a, and becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant.
  • the low-temperature and low-pressure gas-liquid two-phase heat source side refrigerant that has passed through the expansion device 26 a flows out of the relay unit 2.
  • the heat-source-side refrigerant that has flowed out of the relay unit 2 passes through the external refrigerant pipe 4 and flows into the outdoor unit 1.
  • the low-temperature and low-pressure heat source side refrigerant flowing into the outdoor unit 1 passes through the heat source side heat exchanger 12. At this time, heat exchange with the air in the outdoor space 6 is performed, and the heat source side refrigerant is a low-temperature and low-pressure gas.
  • the heat source side refrigerant passes through the first refrigerant flow switching device 11 and the accumulator 19 and is sucked into the compressor 10.
  • the heat medium exchanges heat with a high-temperature and high-pressure gaseous refrigerant in the heat medium heat exchanger 25a and the heat medium heat exchanger 25b to become a high-temperature heat medium.
  • the heat medium heated to high temperature in the heat medium heat exchanger 25a and the heat medium heat exchanger 25b is transferred to the indoor unit 3 by pumps 31a and 31b connected to the heat medium heat exchangers 25a and 25b, respectively.
  • the flow rate of the heat medium flowing into each indoor unit 3 is adjusted by the heat medium flow rate adjusting device 34.
  • the heat medium flowing into the indoor unit 3 connected by the heat medium pipe 5 is heated by exchanging heat with the indoor air in the indoor space 7 by the use side heat exchanger 35.
  • the heat medium exchanged by the use-side heat exchanger 35 is conveyed into the relay unit 2 through the heat medium pipe 5 and the heat medium flow control device 34.
  • the conveyed heat medium passes through the heat medium heat exchanger 25a and the heat medium heat exchanger 25b, is heated, and is again conveyed by the pump 31a and the pump 31b.
  • FIG. 9 is a diagram showing the flow of the refrigerant during the cooling operation mode of the air conditioner according to the first embodiment of the present invention.
  • the direction in which the heat source side refrigerant flows is indicated by a solid line arrow
  • the direction in which the heat medium flows is indicated by a broken line arrow.
  • the compressor 10 compresses the heat source side refrigerant and discharges the high temperature and high pressure gas heat source side refrigerant.
  • the discharged high-temperature and high-pressure refrigerant passes through the first refrigerant flow switching device 11 and passes through the heat source side heat exchanger 12.
  • the heat source side refrigerant exchanges heat with the air in the outdoor space 6 by passing through the heat source side heat exchanger 12.
  • the heat source side refrigerant is a liquid refrigerant.
  • the heat source side refrigerant that has passed through the heat source side heat exchanger 12 flows out of the outdoor unit 1.
  • the heat source side refrigerant flowing out of the outdoor unit 1 passes through the refrigerant pipe 4 outside the outdoor unit 1 and flows into the relay unit 2.
  • the first refrigerant flow switching device 11 is switched so that the high-temperature and high-pressure gas heat source-side refrigerant discharged from the compressor 10 passes through the heat source-side heat exchanger 12.
  • the heat source side refrigerant flowing into the relay unit 2 passes through the expansion device 26a.
  • the heat-source-side refrigerant that has passed through the expansion device 26a is decompressed, becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant, and passes through the heat medium heat exchanger 25a.
  • the heat source side refrigerant that has passed through the heat medium heat exchanger 25a undergoes heat exchange with the heat medium.
  • the expansion device 26a is controlled such that the degree of superheat of the heat source side refrigerant on the heat medium outflow side of the heat medium heat exchanger 25a becomes a target value.
  • the heat-source-side refrigerant that has passed through the heat medium heat exchanger 25a flows out from the relay unit 2.
  • the heat-source-side refrigerant that has flowed out of the relay unit 2 passes through the external refrigerant pipe 4 and flows into the outdoor unit 1.
  • the low-temperature and low-pressure heat source side refrigerant that has flowed into the outdoor unit 1 passes through the first refrigerant flow switching device 11 and the accumulator 19, and the low-temperature and low-pressure heat source side refrigerant that has flowed into the outdoor unit 1 is sucked into the compressor 10.
  • the heat medium exchanges heat with the low-temperature and low-pressure gaseous refrigerant in the heat medium heat exchanger 25a and the heat medium heat exchanger 25b to become a low-temperature heat medium.
  • the heat medium having a low temperature in the heat medium heat exchanger 25a and the heat medium heat exchanger 25b is conveyed to the indoor unit 3 by pumps 31a and 31b connected to the heat medium heat exchangers 25a and 25b, respectively.
  • the flow rate of the heat medium flowing into each indoor unit 3 is adjusted by the heat medium flow rate adjusting device 34.
  • the heat medium flowing into the indoor unit 3 connected by the heat medium pipe 5 is cooled by exchanging heat with the indoor air in the indoor space 7 by the use side heat exchanger 35.
  • the heat medium exchanged by the use-side heat exchanger 35 is conveyed into the relay unit 2 through the heat medium pipe 5 and the heat medium flow control device 34.
  • the conveyed heat medium passes through the heat medium heat exchanger 25a and the heat medium heat exchanger 25b, is cooled, and is again conveyed by the pump 31a and the pump 31b.
  • the relay unit 2 is modularized into the refrigerant circuit side flow path switching unit 21, the heat exchange unit 22, the heat medium circuit side flow path switching unit 23, and the heat. Since the medium adjustment unit 24 is configured and the unit is attached or detached according to the operation mode of the air conditioner, the circuit configuration can be changed according to the application. Further, since it is not necessary to install a unit that is not necessary for the configuration, the installation area, cost, and the like can be suppressed.
  • FIG. 10 is a diagram showing a configuration of another air-conditioning apparatus according to Embodiment 1 of the present invention. Furthermore, by configuring the heat medium circuit side flow path switching unit 23 and the heat medium adjustment unit 24 as a separate unit from the relay unit 2, a plurality of heat medium circuit side flow path switching units 23a and heat mediums can be used in a cooling / heating mixed operation. The number of indoor units 3 can be increased by connecting the circuit side flow path switching unit 23b, the heat medium adjusting unit 24a, and the heat medium adjusting unit 24b in parallel.
  • the heat medium is circulated in the indoor unit 3 for heating or cooling the air in the air space 7 and the heat source side refrigerant is not circulated, the heat source side refrigerant is prevented from leaking into the indoor space 7. Can increase safety. Moreover, since the piping which circulates a heat medium can be shortened rather than an air conditioning apparatus like a chiller, conveyance power can be decreased.
  • FIG. FIG. 11 is a diagram showing a configuration of an air-conditioning apparatus according to Embodiment 2 of the present invention.
  • heat exchange having one heat medium heat exchanger 25 and one expansion device 26 in the relay unit 2 for the air conditioner that does not need to perform the cooling and heating mixed operation.
  • a unit 22 was provided.
  • the heat exchange unit 22 in the relay unit 2 has two heat medium heat exchangers 25 and two expansion devices 26, respectively.
  • the relay unit 2 has two heat medium heat exchangers 25 and two expansion devices 26, so that the heat exchange capacity of the heat medium heat exchanger 25 can be increased. For this reason, more heat can be supplied from the refrigerant circuit side to the heat medium circuit side. Therefore, the number of indoor units 3 in the heat medium circulation circuit can be increased.
  • FIG. 12 is a diagram showing a configuration of another air conditioner according to Embodiment 2 of the present invention. As shown in FIG. 12, if there is a refrigerant circuit side flow path switching unit 21, in the outdoor unit 1, the first connection pipe 4a, the second connection pipe 4b, the check valve 13a, the check valve 13b, the check valve 13c, The check valve 13d may remain attached. For this reason, an air conditioning apparatus can be comprised, without changing the structure of the outdoor unit 1.
  • FIG. 12 is a diagram showing a configuration of another air conditioner according to Embodiment 2 of the present invention. As shown in FIG. 12, if there is a refrigerant circuit side flow path switching unit 21, in the outdoor unit 1, the first connection pipe 4a, the second connection pipe 4b, the check valve 13a, the check valve 13b, the check valve 13c, The check valve 13d may remain attached. For this reason, an air conditioning apparatus can be comprised, without changing the structure of the outdoor unit 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

La présente invention concerne un climatiseur doté d'un circuit de circulation de fluide frigorigène côté source de chaleur à travers lequel circule un fluide frigorigène côté source de chaleur et d'un circuit de circulation de fluide caloporteur à travers lequel circule un fluide caloporteur. Selon l'invention : un compresseur, un premier dispositif de commutation de trajet d'écoulement de fluide frigorigène, et un échangeur de chaleur côté source de chaleur sont logés dans une unité extérieure ; un échangeur de chaleur à fluide caloporteur et un dispositif d'étranglement sont logés dans une unité d'échange de chaleur ; et un échangeur de chaleur côté utilisation est logé dans une unité intérieure, le climatiseur étant pourvu d'une unité de commutation de trajet d'écoulement côté circuit de fluide frigorigène qui est raccordée par l'intermédiaire d'une tuyauterie entre l'unité extérieure et l'unité d'échange de chaleur, qui est installée de manière amovible, et qui a un second dispositif de commutation de trajet d'écoulement de fluide frigorigène pour commuter le trajet de circulation du fluide frigorigène côté source de chaleur dans le circuit de circulation de fluide frigorigène côté source de chaleur, et pourvu d'une unité de commutation côté circuit de fluide caloporteur qui est raccordée par l'intermédiaire d'une tuyauterie entre l'unité d'échange de chaleur et l'unité intérieure, qui est installé de manière amovible, et qui a un dispositif de commutation de trajet d'écoulement de milieu de chaleur pour commuter le trajet de circulation de fluide caloporteur dans le circuit de circulation de fluide caloporteur.
PCT/JP2017/004186 2017-02-06 2017-02-06 Climatiseur WO2018142607A1 (fr)

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GB1909669.2A GB2573224B (en) 2017-02-06 2017-02-06 Air-conditioning device
PCT/JP2017/004186 WO2018142607A1 (fr) 2017-02-06 2017-02-06 Climatiseur
JP2018565219A JPWO2018142607A1 (ja) 2017-02-06 2017-02-06 空気調和装置

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JP6881623B1 (ja) * 2020-01-20 2021-06-02 ブラザー工業株式会社 空調機

Citations (4)

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Publication number Priority date Publication date Assignee Title
WO2010050007A1 (fr) * 2008-10-29 2010-05-06 三菱電機株式会社 Climatiseur
WO2010128557A1 (fr) * 2009-05-08 2010-11-11 三菱電機株式会社 Climatiseur
JP2011033290A (ja) * 2009-08-04 2011-02-17 Mitsubishi Electric Corp 熱交換器、空気調和装置およびヒートポンプシステム
WO2014045358A1 (fr) * 2012-09-20 2014-03-27 三菱電機株式会社 Dispositif de climatiseur

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Publication number Priority date Publication date Assignee Title
JPH02223774A (ja) * 1989-02-27 1990-09-06 Toshiba Corp 空気調和機
JP5884855B2 (ja) * 2014-05-30 2016-03-15 ダイキン工業株式会社 冷媒流路切換ユニット

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010050007A1 (fr) * 2008-10-29 2010-05-06 三菱電機株式会社 Climatiseur
WO2010128557A1 (fr) * 2009-05-08 2010-11-11 三菱電機株式会社 Climatiseur
JP2011033290A (ja) * 2009-08-04 2011-02-17 Mitsubishi Electric Corp 熱交換器、空気調和装置およびヒートポンプシステム
WO2014045358A1 (fr) * 2012-09-20 2014-03-27 三菱電機株式会社 Dispositif de climatiseur

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