WO2015182486A1 - Dispositif de conditionnement de l'air et procédé de commande associé - Google Patents

Dispositif de conditionnement de l'air et procédé de commande associé Download PDF

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Publication number
WO2015182486A1
WO2015182486A1 PCT/JP2015/064650 JP2015064650W WO2015182486A1 WO 2015182486 A1 WO2015182486 A1 WO 2015182486A1 JP 2015064650 W JP2015064650 W JP 2015064650W WO 2015182486 A1 WO2015182486 A1 WO 2015182486A1
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WIPO (PCT)
Prior art keywords
refrigerant
air conditioner
indoor
heat exchanger
outdoor
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PCT/JP2015/064650
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English (en)
Japanese (ja)
Inventor
岡本　敦
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ダイキン工業株式会社
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Publication of WO2015182486A1 publication Critical patent/WO2015182486A1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit

Definitions

  • the present invention relates to an air conditioner apparatus and a control method thereof, and more specifically, to an air conditioner apparatus capable of anti-mold operation and a control method thereof.
  • a heating device that heats the original heat exchanger and realizes dehumidification prevention mold, that is, a heating mode in which the refrigerant is flowed in the reverse direction to enter the heating mode is one of the implementation methods.
  • An air conditioner having an antifungal function is disclosed.
  • the cooling operation is stopped and then the refrigerant is allowed to flow in the reverse direction to switch to the heating operation, thereby heating the indoor heat exchanger and evaporating moisture.
  • FIG. 8 shows an ordinary pair-type air conditioner, an outdoor unit 100X including a gas-liquid separator 11X, a compressor 12X, a four-way valve V0X, and an outdoor heat exchanger 13X, an indoor-side refrigerant regulator V1X, and indoor heat. And an indoor unit 200X including an exchanger 21X.
  • the above members are connected to each other by pipes to form a refrigerant circulation circuit.
  • FIG. 9 is a diagram showing a refrigerant circuit of a normal multi-type air conditioner apparatus, in which a plurality of indoor units 201X and 202X are connected in parallel.
  • the present invention provides an air conditioner that can immediately perform mold prevention operation without increasing the load on the compressor after stopping the cooling operation, and can perform mold prevention operation for a long time. It is an object of the present invention to provide an apparatus and a control method thereof.
  • an air conditioner includes an outdoor unit and a mold prevention indoor unit, and a gas-liquid separator, a compressor, an outdoor flow direction switching device included in the outdoor unit, An outdoor heat exchanger, an indoor-side refrigerant adjustment device included in the anti-mold indoor unit, and an indoor heat exchange unit are sequentially connected by a pipe to form a main refrigerant circuit, and the air conditioner includes the outdoor flow direction switching device To change the flow direction of the refrigerant in the main refrigerant circuit to switch between the cooling operation and the heating operation, further connecting the discharge side of the compressor and the indoor heat exchange unit, and the first refrigerant A branch pipe in which an adjusting device is connected in series, the gas-liquid separator and the indoor heat exchange unit are connected, together with the branch pipe, the compressor, the indoor heat exchange unit, Sequentially connecting a listen-liquid separator and a bypass tube constituting the antifungal circuit.
  • the compressor, the indoor heat exchange unit, and the gas-liquid separator are sequentially connected by the branch pipe and the bypass pipe to constitute the anti-mold operation circuit.
  • the air conditioner apparatus is based on the air conditioner apparatus according to the first aspect of the present invention, and the indoor heat exchange unit has a dehumidifying heat exchanger and a heating heat exchanger.
  • the gas-liquid separator, the compressor, the outdoor flow direction switching device, the outdoor heat exchanger, the indoor refrigerant control device, and the dehumidifying heat exchanger are sequentially connected to constitute the main refrigerant circuit.
  • the compressor, the heating heat exchanger, and the gas-liquid separator are connected by the bypass pipe and the branch pipe to constitute the anti-mold operation circuit.
  • switching between the cooling operation, the heating operation, and the heating and dehumidifying operation can be realized by switching to the outdoor flow direction switching device. Can be provided.
  • the air conditioner according to the third aspect of the present invention is based on the air conditioner according to the first aspect of the present invention, and the indoor heat exchange unit is a high-pressure refrigerant that forms part of the main refrigerant circuit.
  • a low-pressure refrigerant pipe part that constitutes a pipe part and a part of the anti-mold operation circuit, and each of the high-pressure refrigerant pipe part and the low-pressure refrigerant pipe part is connected to a flow divider and joins via the pipe ,
  • the low-pressure refrigerant control valve is arranged between the flow divider and the junction point for the low-pressure refrigerant pipe.
  • the low-pressure refrigerant control valve when the anti-mold operation is performed with the first refrigerant control device turned on, the low-pressure refrigerant control valve is turned off so that the high-pressure refrigerant pipe portion of the indoor heat exchange unit is turned off. Since a part of the high-pressure refrigerant that has flowed out has a pressure difference, it is possible to avoid circulation from a low-pressure refrigerant pipe portion having a low pressure, and to further increase the fungicidal effect.
  • the air conditioner according to the fourth aspect of the present invention is based on the air conditioner according to the first aspect of the present invention, and the first refrigerant regulator is an electric valve or an electromagnetic valve.
  • the air-conditioner apparatus can be manufactured more conveniently and cheaply by using a commonly used electric valve or electromagnetic valve as the outdoor flow direction switching apparatus.
  • the air conditioner according to the fifth aspect of the present invention is based on the air conditioner according to the first aspect of the present invention, a drain pan is disposed below the indoor heat exchange unit, and the heating heat exchanger is Even the dehumidifying heat exchanger is closer to the drain pan.
  • the effect of condensate accumulated in the dehumidifying heat exchanger can be improved and the drain pan can be dried, so that the mold prevention effect can be further enhanced.
  • the air conditioner apparatus is based on the air conditioner apparatus according to the second aspect of the present invention, wherein the anti-mold indoor unit further includes another indoor-side refrigerant regulator, The other indoor-side refrigerant control device is disposed between the gas-liquid separator and the heating heat exchanger in the anti-mold operation circuit.
  • the flow rate of the refrigerant flowing through each of the dehumidifying heat exchanger and the heating heat exchanger can be easily adjusted, and air having appropriate temperature and humidity is provided indoors. Can do.
  • the air conditioner according to the seventh aspect of the present invention is based on the air conditioner according to the second aspect of the present invention, and the outdoor flow direction switching device is a four-way valve.
  • the air flow apparatus can be manufactured more conveniently and cheaply by using a frequently used four-way valve as the outdoor flow direction switching apparatus.
  • the air conditioner according to the eighth aspect of the present invention is based on the air conditioner according to the seventh aspect of the present invention, and the first refrigerant control device is a flow direction switching device that switches the flow direction of the refrigerant.
  • the flow direction switching device includes a state in which the heating heat exchanger communicates with the discharge side of the compressor via the branch pipe, and a state in which the heating heat exchanger is communicated with the suction side of the compressor via the branch pipe. Switch between communicating states.
  • air having appropriate temperature and humidity can be provided indoors by switching between the outdoor flow direction switching device and the first refrigerant control device.
  • An air conditioner according to a ninth aspect of the present invention is based on the air conditioner according to the first aspect of the present invention, wherein the outdoor unit includes a supercooling unit, and the bypass pipe includes the supercooling unit. This is a supercooled pipe.
  • the manufacturing cost can be reduced compared to the case where the pipe connecting the inlet side of the gas-liquid separator and the outdoor heat exchange unit is arranged as a bypass pipe.
  • the air conditioner apparatus according to the tenth aspect of the present invention is based on the air conditioner apparatus according to the ninth aspect of the present invention, and the supercooling unit is a double-tube supercooler.
  • the air conditioner apparatus can be manufactured more conveniently and cheaply by using a commonly used double pipe type supercooler as a supercooling unit.
  • the air conditioner apparatus according to the eleventh aspect of the present invention is based on the air conditioner apparatus according to the first aspect of the present invention, and a second refrigerant regulator is connected in series to the bypass pipe.
  • the efficiency of the mold prevention operation can be increased by controlling the flow rate of the refrigerant flowing through the bypass pipe by the second refrigerant adjusting device.
  • the air conditioner apparatus according to the twelfth aspect of the present invention is based on the air conditioner apparatus according to the eleventh aspect of the present invention, and the second refrigerant regulator is an electric valve, an electromagnetic valve, or a capillary tube. Any one of them.
  • the air conditioner apparatus can be manufactured by using any one of the commonly used motor operated valve, electromagnetic valve, and capillary tube as the second refrigerant adjusting apparatus. Can be more convenient and cheaper.
  • An air conditioner according to the thirteenth aspect of the present invention is based on the air conditioner apparatus according to the first aspect of the present invention, and the outdoor unit includes an outdoor refrigerant adjustment device, and the outdoor refrigerant adjustment The apparatus is connected in series with the outdoor heat exchanger and controls the flow rate of the refrigerant flowing through the outdoor heat exchanger.
  • air having an appropriate temperature and humidity is provided indoors by controlling the flow rate of the refrigerant flowing through the outdoor heat exchanger by the outdoor refrigerant adjusting device. can do.
  • the air conditioner apparatus is any one of the first direction, the third direction, the fourth direction, the ninth direction, the tenth direction and the thirteenth direction of the present invention.
  • the air conditioner device further includes a plurality of indoor units connected in parallel to the main refrigerant circuit.
  • the air conditioner apparatus According to the air conditioner apparatus according to the fourteenth aspect of the present invention, it is possible to immediately perform the mold prevention operation without increasing the burden on the compressor regardless of whether or not the plurality of indoor units are performing the cooling operation. In addition, the mold prevention operation can be performed for a long time.
  • An air conditioner apparatus is based on the air conditioner apparatus according to any one of the second, fifth, and eighth directions of the present invention. Further includes a plurality of indoor units connected in parallel to the main refrigerant circuit.
  • the mold prevention operation can be immediately performed without increasing the burden on the compressor, In addition, the mold prevention operation can be performed for a long time.
  • the air conditioner apparatus according to the sixteenth aspect of the present invention is based on the air conditioner apparatus according to the eleventh or twelfth aspect of the present invention, and the air conditioner apparatus further includes the main refrigerant circuit. It includes a plurality of indoor units connected in parallel.
  • the air conditioner apparatus of the sixteenth aspect of the present invention it is possible to immediately perform the mold prevention operation without increasing the burden on the compressor, regardless of whether or not the plurality of indoor units are performing the cooling operation.
  • the mold prevention operation can be performed for a long time.
  • a control method for an air conditioner apparatus controls the air conditioner apparatus according to any one of the first to sixteenth aspects of the present invention.
  • the connection state of the outdoor flow direction switching device is Therefore, the increase in compressor load due to the switching of the outdoor flow direction switching device as in the existing technology is avoided, the mold prevention operation can be performed immediately after the cooling operation, and the mold prevention operation for a long time is possible. It is.
  • a control method for an air conditioner according to any one of the second, fifth, eighth and fifteenth directions.
  • the indoor heat exchange unit is communicated to the discharge side of the compressor via the branch pipe by a device, the indoor refrigerant control device corresponding to the dehumidifying heat exchanger is turned off, and the outdoor flow direction switching is performed. Storing a part of the refrigerant in the gas-liquid separator and / or the outdoor heat exchanger while maintaining the state of the apparatus, and circulating the remaining refrigerant in the anti-mold operation circuit.
  • the connection state of the outdoor flow direction switching device is Therefore, the increase in compressor load due to the switching of the outdoor flow direction switching device as in the existing technology is avoided, the mold prevention operation can be performed immediately after the cooling operation, and the mold prevention operation for a long time is possible. It is. Further, by turning off the indoor refrigerant control device corresponding to the dehumidifying heat exchanger, it is possible to prevent the anti-mold effect from being condensed by the condensation of the dehumidifying heat exchanger.
  • the control method for an air conditioner apparatus controls the air conditioner apparatus according to the sixteenth aspect of the present invention.
  • A) The flow direction of the refrigerant is controlled by the outdoor flow direction switching apparatus.
  • the indoor heat exchange unit is connected to the branch pipe by the first refrigerant adjustment device.
  • the connection state of the outdoor flow direction switching device is Therefore, the increase in the compressor load due to the switching of the outdoor flow direction switching device as in the existing technology is avoided, the mold prevention operation can be performed immediately after the cooling operation, and the mold prevention operation for a long time can be performed. Is possible.
  • the control method of the air conditioner apparatus according to the twenty-first aspect of the present invention is based on the control method of the air conditioner apparatus according to the nineteenth aspect of the present invention, wherein the indoor heat exchange unit is A dehumidifying heat exchanger and a heating heat exchanger, the gas-liquid separator, the compressor, the outdoor flow direction switching device, the outdoor heat exchanger, the indoor refrigerant control device, and the dehumidifying heat exchanger in order.
  • the compressor, the heating heat exchanger, and the gas-liquid separator are sequentially connected to form the anti-mold operation circuit, and in steps B) and C) Then, the indoor-side refrigerant regulator corresponding to the dehumidifying heat exchanger is turned off.
  • the control method for an air conditioner apparatus by turning off the indoor refrigerant control device corresponding to the dehumidifying heat exchanger, the anti-mold effect due to the condensation of the dehumidifying heat exchanger is reduced. The influence can be prevented.
  • the mold prevention operation can be executed immediately without increasing the load on the compressor, and the mold prevention operation for a long time is possible. is there.
  • the air conditioner 1 includes an outdoor unit 100 and a mold prevention indoor unit 200.
  • the outdoor unit 100 includes a gas-liquid separator 11, a compressor 12, an outdoor flow direction switching device V0, and an outdoor heat exchanger 13.
  • the anti-mold indoor unit 200 includes an indoor refrigerant control device V1, an indoor heat exchange.
  • a unit 21 is included.
  • the outdoor unit 100 further includes closing valves VS1 to VS3.
  • the gas-liquid separator 11, the compressor 12, the outdoor flow direction switching device V0, the outdoor heat exchanger 13, the indoor refrigerant control device V1, and the indoor heat exchange unit 21 are sequentially connected by a pipe to be connected to the main refrigerant. Configure the circuit.
  • the outlet side of the gas-liquid separator 11 is connected to the suction side of the compressor 12 via the pipe P01, and the discharge side of the compressor 12 is connected to the outdoor flow direction switching device V0 via the pipe P02.
  • the outside flow direction switching device V0 is connected to the outdoor heat exchanger 13 via the piping P03, the outdoor heat exchanger 13 is connected to the closing valve VS1 via the piping P04, and the closing valve VS1 is connected to the indoor refrigerant control device V1 via the piping P1.
  • the indoor refrigerant control device V1 is switched to the closing valve VS2 via the pipe P2 to which the indoor heat exchange unit 21 is connected in series, and the closing valve VS2 is switched to the outdoor flow direction switching device V0 via the pipe P05.
  • the device V0 is connected to the inlet side of the gas-liquid separator 11 via the pipe P06 and constitutes a main refrigerant circuit.
  • the air conditioner 1 switches between the cooling operation and the heating operation by changing the flow direction of the refrigerant in the main refrigerant circuit by the outdoor flow direction switching device V0.
  • the outdoor flow direction switching device V0 is a four-way valve, and when the outdoor flow direction switching device V0 is switched so that the piping P02 and the piping P03 communicate with each other and the piping P05 and the piping P06 communicate with each other, When the air conditioner 1 is in a cooling operation, and the outdoor flow direction switching device V0 is switched so that the pipe P02 and the pipe P05 communicate with each other and the pipe P03 and the pipe P06 communicate with each other, the air conditioner 1 enters the heating operation.
  • the air conditioner device 1 of the present embodiment has a branch pipe DP and a bypass pipe BP, which connects the discharge side of the compressor 12 and the indoor heat exchange unit 21,
  • a first refrigerant regulator V3 is connected in series to the branch pipe DP.
  • the bypass pipe BP connects the gas-liquid separator 11 and the indoor heat exchange unit 21, and together with the branch pipe DP, sequentially connects the compressor 12, the indoor heat exchange unit 21, and the gas-liquid separator 11 to prevent mold. Configure the operation circuit.
  • coolant adjustment apparatus V3 can employ
  • the branch pipe DP branches from the middle of the pipe P02, extends to the shut-off valve VS3, and passes through the pipe P3 to which the indoor heat exchange unit 21 is connected in series, and then joins the pipe P1.
  • the bypass pipe BP branches from the middle of the pipe P04 and is connected to the middle of the pipe P06 to constitute a mold prevention operation circuit.
  • the air conditioner 1 starts the operation (cooling operation) in the state where the outdoor flow direction switching device V0 is shown by the solid line in FIG.
  • the indoor refrigerant adjustment device V1 is turned on and the first refrigerant adjustment device V3 is turned off.
  • the refrigerant is compressed by the compressor 12 of the outdoor unit 100, and the refrigerant compressed and discharged by the compressor 12 passes through the pipe P02, the outdoor flow direction switching device V0, and the pipe P03.
  • the refrigerant that flows into the heat exchanger 13 and flows into the outdoor heat exchanger 13 exchanges heat with outdoor air in the outdoor heat exchanger 13, and passes through the pipe P04, the shut-off valve VS1, and the pipe P1, and the mold prevention indoor unit. Transported to 200.
  • the refrigerant transported to the anti-mold indoor unit 200 flows into the indoor heat exchange unit 21 through the indoor refrigerant control device V1 and the pipe P2, and exchanges heat with indoor air in the indoor heat exchange unit 21.
  • the temperature of the indoor air is adjusted.
  • the refrigerant flows into the gas-liquid separator 11 through the pipe P2, the closing valve VS2, the pipe P05, the outdoor flow direction switching device V0, and the pipe P06, and is sucked into the compressor 12 again through the pipe P01.
  • the first refrigerant control device V3 When the air conditioner 1 has been operated for a predetermined time in the cooling operation state and condensed water needs to be stored in the indoor heat exchange unit 21 and the mold prevention operation is required, the first refrigerant control device V3 is turned on to The exchange unit 21 is communicated with the discharge side of the compressor 12 via the branch pipe DP, and a part of the refrigerant is removed from the gas-liquid separator 11 and / or the outdoor heat exchanger 13 while maintaining the state of the outdoor flow direction switching device VO. And the remaining refrigerant is circulated in the mold prevention circuit.
  • the compressor 12 is operated at a low frequency for a predetermined time (for example, a time during which the indoor heat exchange unit 21 can be surely dried) (here, the rotational speed of the compressor is set to the rated minimum operating speed). It can be set to a rotational speed between the required anti-fungal operation capacity) and then stopped. However, even if the operating frequency and operating time of the compressor 12 are adjusted appropriately as required Good.
  • the first refrigerant control device V3 is turned on, the indoor heat exchange unit 21 is communicated with the discharge side of the compressor 12 via the branch pipe DP, and the state of the outdoor flow direction switching device VO is changed.
  • a part of the refrigerant discharged from the compressor 12 flows into the branch pipe DP through the pipe P02.
  • the refrigerant flowing into the branch pipe DP passes through the first refrigerant adjusting device V3, and flows into the pipe P3 through the closing valve VS3.
  • the refrigerant that has flowed into the pipe P3 flows through the indoor heat exchange unit 21 and branches at the junction K0.
  • a part of the refrigerant flows into the pipe P1 via the pipe P2 and the indoor refrigerant control device V1, and the remaining part is the pipe P2.
  • the refrigerant flowing into the pipe P1 flows into the pipe P04 through the closing valve VS1V, and then flows into the bypass pipe BP.
  • the refrigerant flowing into the pipe P05 flows into the pipe P06 through the outdoor flow direction switching device VO, and then merges with the refrigerant flowing from the bypass pipe PB.
  • the merged refrigerant flows into the gas-liquid separator 11 through the pipe P06 and is sucked into the compressor 12 again through the pipe P01.
  • FIG. 2 is a pressure enthalpy diagram of the refrigerant state in each part of the anti-mold operation circuit when the air-conditioner apparatus 1 performs the anti-mold operation.
  • A is the suction side of the compressor 12
  • B is the discharge side of the compressor 12
  • C is the liquid side of the indoor refrigerant regulator V1
  • D is the gas side of the indoor refrigerant regulator V1.
  • D is assumed that the refrigerant state of D and the refrigerant state of A are the same.
  • the first refrigerant regulator V3 is turned on to prevent the refrigerant from being generated in the mold prevention operation circuit. It is not necessary to switch the connection state of the outdoor flow direction switching device V0, there is no increase in the load of the compressor due to switching of the outdoor flow direction switching device as in the existing technology, and after the cooling operation, The mold prevention operation can be performed immediately, and the mold prevention operation for a long time (for example, 10 minutes) is possible.
  • the indoor heat exchange unit 21 includes a high-pressure refrigerant pipe part that is connected in series to the pipe P2 and forms part of the main refrigerant circuit, and a low-pressure that is connected in series to the pipe P3 and forms part of the anti-mold operation circuit.
  • a part of the high-pressure refrigerant flowing out from the high-pressure refrigerant pipe of the indoor heat exchange unit 21 has a low pressure due to the pressure difference. It may circulate from the low-pressure refrigerant piping.
  • shunts 22 and 23 are connected to the low-pressure refrigerant pipe part and the high-pressure refrigerant pipe part of the indoor heat exchange unit 21, respectively, and at the junction K0 via the pipes.
  • it can be connected to the indoor refrigerant control device V1
  • the low pressure refrigerant control valve VK can be arranged between the flow divider 22 corresponding to the low pressure refrigerant pipe and the junction K0.
  • the low-pressure refrigerant control valve VK can employ an electric valve or an electromagnetic valve.
  • the refrigerant flow rate or the opening / closing of the piping can be controlled by the outdoor refrigerant adjustment device V4 and / or the second refrigerant adjustment device V5. Further, since the supercooling pipe of the cooling unit 14 is also used as a bypass pipe, the manufacturing cost is lower than the case where a bypass pipe is separately provided as a pipe connecting the inlet side of the gas-liquid separator and the outdoor heat exchange unit. Can be reduced.
  • the outdoor refrigerant regulator V4 and the supercooling unit 14 are arranged at the same time in the pipe P04.
  • the present invention is not limited to this, and the outdoor refrigerant regulator V4 and the supercooling unit 14 are connected to the pipe P04. Only one of them may be arranged.
  • the second refrigerant regulator V5 is connected in series to the bypass pipe BP, but the second refrigerant regulator V5 may not be arranged in the bypass pipe BP.
  • FIG. 5 is a diagram showing the structure of the refrigerant circuit of the air conditioner 1A according to Embodiment 2 of the present invention.
  • the structure of the air conditioner 1A according to the present embodiment is almost the same as that of the air conditioner 1 according to the first embodiment.
  • the same reference numerals are given to the same members as those in the first embodiment, and different parts from the first embodiment will be described.
  • a first refrigerant regulator V3 ′ is used instead of the first refrigerant regulator V3 in the first embodiment, and the first refrigerant regulator V3 ′ changes the flow direction of the refrigerant.
  • the indoor heat exchange unit 21 communicates with the suction side of the compressor 12 via the branch pipe DP, and the discharge of the compressor 12 via the branch pipe DP. It is possible to switch between states that communicate with each other.
  • the first refrigerant control device V3 ′ is a four-way valve, and compresses the indoor heat exchange unit 21 through the pipe P3, the closing valve VS3, the branch pipe DP, the pipe P07, the pipe P06, the gas-liquid separator 11 and the pipe P01. Switching between the state of communication with the suction side of the machine 12 and the state of communication of the indoor heat exchange unit 21 with the discharge side of the compressor 12 via the pipe P3, the closing valve VS3, the branch pipe DP, and the pipe P02. it can.
  • a second refrigerant regulator V5 similar to the second modification of the first embodiment is connected in series to the bypass pipe BP.
  • the air conditioner 1A further includes two indoor units 201 and 202, and these two indoor units 201 and 202 are connected in parallel to the main refrigerant circuit.
  • each of the indoor units 201 and 202 includes a heat exchanger and a refrigerant adjusting device.
  • the air conditioner 1A starts the operation (cooling operation) in the state where the outdoor flow direction switching device V0 is shown by the solid line in FIG. 5, the indoor unit 201 is operated, and the indoor unit 202 is stopped. . At this time, the indoor heat exchange unit 21 is communicated with the suction side of the compressor 12 through the branch pipe DP by the first refrigerant adjustment device V3 '.
  • the refrigerant is compressed by the compressor 12 of the outdoor unit 100 ′′, and the refrigerant compressed and discharged by the compressor 12 passes through the pipe P02, the outdoor flow direction switching device V0, and the pipe P03, and performs outdoor heat exchange.
  • the refrigerant flowing into the vessel 13 and flowing into the outdoor heat exchanger 13 exchanges heat with the outdoor air in the outdoor heat exchanger 13, and then passes through the pipe P04, the shut-off valve VS1, and the pipe P1, and the anti-mold indoor unit 200, It is transported to the unit 201.
  • the refrigerant transported to the mold prevention indoor unit 200 flows into the indoor heat exchange unit 21 through the indoor side refrigerant control device V1 and the pipe P2.
  • the refrigerant flowing into the indoor heat exchange unit 21 exchanges heat with the indoor air in the indoor heat exchange unit 21, thereby adjusting the temperature of the indoor air.
  • a part of the refrigerant flows out of the anti-mold indoor unit 200 through the pipe P2, and the remaining part of the refrigerant flows out of the anti-mold indoor unit 200 through the pipe P3.
  • the refrigerant transported to the indoor unit 201 passes through the heat exchanger and the refrigerant adjusting device of the indoor unit 201, and merges with the refrigerant that has flowed out of the anti-mold indoor unit 200 via the pipe P2.
  • the merged refrigerant flows into the pipe P06 through the pipe P2, the shutoff valve VS2, the pipe P05, the outdoor flow direction switching device V0, and the pipe P3, the shutoff valve VS3, the branch pipe DP, the first refrigerant adjusting device V3 ′. And merges with the refrigerant flowing into the pipe P07.
  • the merged refrigerant flows into the gas-liquid separator 11 and is again sucked into the compressor 12 through the pipe P01.
  • the indoor heat exchange unit 21 is operated by the first refrigerant adjustment device V3 ′. Is communicated with the discharge side of the compressor 12 through the branch pipe DP, the step 1 for maintaining the state of the outdoor flow direction switching device V0 and the indoor unit 201 are also stopped (that is, all the indoor units are stopped), the second The refrigerant regulating device V5 is turned on, a part of the refrigerant is stored in the gas-liquid separator 11 and / or the outdoor heat exchanger 13, and the remaining refrigerant is circulated in the anti-mold operation circuit.
  • the compressor 12 is operated at a low frequency for a predetermined time (for example, a time during which the indoor heat exchange unit 21 can be surely dried) (here, the compressor rotation speed is set to the rated minimum operation speed). It can be set to a rotational speed between the required anti-fungal operation capacity) and then stopped.
  • the operating frequency and operating time of the compressor 12 are adjusted appropriately as required Good.
  • the flow of the refrigerant in the anti-mold operation circuit is the same as that at the anti-mold operation in the first embodiment, and therefore will not be described repeatedly.
  • FIG. 6 is a diagram showing the structure of the refrigerant circuit of the air conditioner 1B according to Embodiment 3 of the present invention.
  • the structure of the air conditioner 1B according to the present embodiment is substantially the same as that of the air conditioner 1 according to the first embodiment.
  • the same reference numerals are given to the same members as those in the first embodiment, and the description will focus on portions different from those in the first embodiment.
  • the indoor heat exchange unit 21 includes a dehumidifying heat exchanger 21a and a heating heat exchanger 21b, and includes a gas-liquid separator 11, a compressor 12, and an outdoor flow direction switching device.
  • V0, the outdoor heat exchanger 13, the indoor refrigerant control device V1, and the indoor heat exchange unit 21 are sequentially connected by a pipe to form a main refrigerant circuit, and include a compressor 12, a heating heat exchanger 21b, and a gas-liquid separator. 11 are sequentially connected by piping to constitute a mold prevention circuit.
  • the anti-mold indoor unit 200 ′ further includes another indoor-side refrigerant regulator V2, and the other indoor-side refrigerant regulator V2 is heated with the compressor 12 in the anti-mold operation circuit. It arrange
  • the dehumidifying heat exchanger 21a and the heating heat exchanger 21b have corresponding indoor-side refrigerant adjustment devices.
  • the flow rate of the refrigerant flowing through the dehumidifying heat exchanger 21a and the heating heat exchanger 21b can be easily adjusted, and air having appropriate temperature and humidity can be provided indoors.
  • the indoor refrigerant control device V2 may not be arranged.
  • the air conditioner 1B starts the operation (cooling operation) in the state where the outdoor flow direction switching device V0 is shown by the solid line in FIG. 6, and at this time, the indoor refrigerant control devices V1 and V2 are turned on, The first refrigerant adjustment device V3 ′ is switched to a state where the branch pipe DP and the suction side of the compressor 12 communicate with each other.
  • the refrigerant is compressed by the compressor 12 of the outdoor unit 100 ′′, and the refrigerant compressed and discharged by the compressor passes through the pipe P02, the outdoor flow direction switching device V0, and the pipe P03.
  • the refrigerant flowing into the outdoor heat exchanger 13 exchanges heat with outdoor air in the outdoor heat exchanger 13, and enters the anti-mold indoor unit 200 ′ through the pipe P04, the shut-off valve VS1, and the pipe P1. Transported.
  • a part of the refrigerant transported to the anti-mold indoor unit 200 ′ flows into the dehumidifying heat exchanger 21a via the indoor side refrigerant control device V1 and the pipe P2, and the refrigerant transported to the anti-mold indoor unit 200 ′.
  • the remaining part flows into the heating heat exchanger 21b through the indoor refrigerant control device V2 and the pipe P3, so that the indoor heat exchange unit 21 exchanges heat with the indoor air, thereby adjusting the temperature of the indoor air. Adjust.
  • the refrigerant that has flowed into the dehumidifying heat exchanger 21a flows into the pipe P05 through the pipe P2 and the closing valve VS2.
  • the refrigerant that has flowed into the heating heat exchanger 21b flows into the pipe P07 through the pipe P3, the closing valve VS3, the branch pipe DP, and the first refrigerant adjusting device V3 ′, and from the pipe P05 through the outdoor flow direction switching device V0. It merges with the refrigerant that has flowed into the pipe P06. The merged refrigerant flows into the gas-liquid separator 11 and is again sucked into the compressor 12 through the pipe P01.
  • the air conditioner 1B When the air conditioner 1B has been operating for a predetermined time in the cooling operation state, when the condensed water accumulates in the indoor heat exchange unit 21 (the dehumidifying heat exchanger 21a) and the mold prevention operation is performed, the first refrigerant adjustment device By V3 ′, the indoor heat exchange unit 21 (the heating heat exchanger 21b) is connected to the discharge side of the compressor 12 via the branch pipe DP, and the indoor side refrigerant control device V1 corresponding to the dehumidifying heat exchanger 21a is turned off.
  • the compressor 12 While maintaining the state of the outdoor flow direction switching device V0, a part of the refrigerant is stored in the gas-liquid separator 11 and / or the outdoor heat exchanger 13, and the remaining refrigerant is circulated through the anti-mold operation circuit.
  • the compressor 12 is operated at a low frequency for a predetermined time (for example, a time during which the indoor heat exchange unit 21 can be surely dried) (here, the compressor rotation speed is set to the rated minimum operation speed). It can be set to a rotational speed between the required anti-fungal operation capacity) and then stopped. However, even if the operating frequency and operating time of the compressor 12 are adjusted appropriately as required Good.
  • the anti-mold operation is performed, and the indoor heat exchange unit 21 is branched by the first refrigerant control device V3 ′.
  • the air is discharged from the compressor 12.
  • a part of the refrigerant flows into the branch pipe DP through the pipe P02.
  • the refrigerant flowing into the branch pipe DP flows through the first refrigerant adjustment device V3 ′, and flows into the pipe P3 through the closing valve VS3.
  • the refrigerant that has flowed into the pipe P3 flows through the heating heat exchanger 21b of the indoor heat exchange unit 21, and flows into the pipe P1 through the pipe P3 and the indoor-side refrigerant regulator V2.
  • the refrigerant flowing into the pipe P1 flows into the pipe P04 through the closing valve VS1, and then flows into the bypass pipe BP. Then, the refrigerant flows into the gas-liquid separator 11 through the pipe P06 and is sucked into the compressor 12 again through the pipe P01.
  • the indoor heat exchange unit 21 is branched by the first refrigerant adjustment device V3 ′. It is only necessary to communicate with the discharge side of the compressor 12 via the pipe DP, and it is not necessary to switch the connection state of the outdoor flow direction switching device V0, and the compressor is configured by switching the outdoor flow direction switching device as in the existing technology.
  • the mold prevention operation can be performed immediately after the cooling operation, and the mold prevention operation for a long time (for example, 10 minutes) is possible.
  • the indoor side refrigerant control device V1 is turned off, so that the influence on the mold prevention effect due to the condensation of the dehumidifying heat exchanger 21a can be avoided.
  • the first refrigerant regulator V3 ′ is a four-way valve, but before switching the indoor heat exchange unit 21 to communicate with the discharge side of the compressor 12 via the branch pipe DP, the low-pressure refrigerant Since only it flows through it, the flow direction of the refrigerant can be switched smoothly.
  • switching between the cooling operation, the heating operation, and the heating and dehumidifying operation can be realized by switching between the outdoor flow direction switching device V0 and the first refrigerant adjusting device V3 ′, and has an appropriate temperature and humidity. Air can be provided indoors.
  • FIG. 7 is a view showing the structure of the refrigerant circuit of the air conditioner 1C according to Embodiment 4 of the present invention.
  • the structure of the air conditioner 1C according to the present embodiment is substantially the same as that of the air conditioner 1B according to the third embodiment.
  • the same reference numerals are given to the same members as those in the third embodiment, and the description will be made focusing on portions different from the third embodiment.
  • the air conditioner 1C further includes two indoor units 201 and 202 connected in parallel to the main refrigerant circuit, as in the second embodiment.
  • each of the indoor units 201 and 202 includes a heat exchange and a refrigerant adjusting device.
  • the air conditioner 1C starts the operation (cooling operation) in the state where the outdoor flow direction switching device V0 is shown by the solid line in FIG. 7, the indoor unit 201 is operated, and the indoor unit 202 is stopped. And At this time, the indoor heat exchange unit 21 is communicated with the suction side of the compressor 12 through the branch pipe DP by the first refrigerant adjustment device V3 '.
  • the refrigerant is compressed by the compressor 12 of the outdoor unit 100 ′′, and the refrigerant compressed and discharged by the compressor 12 passes through the pipe P02, the outdoor flow direction switching device V0, and the pipe P03, and performs outdoor heat exchange.
  • the refrigerant flowing into the vessel 13 and flowing into the outdoor heat exchanger 13 exchanges heat with outdoor air in the outdoor heat exchanger 13, and then flows into the pipe P1 through the pipe P04 and the shut-off valve VS1, and then into the pipe P1.
  • Part of the refrigerant that has flowed into the mold is transported to the anti-mold indoor unit 200, and the remaining part is transported to the indoor unit 201.
  • a part of the refrigerant transported to the anti-mold indoor unit 200 flows into the dehumidifying heat exchanger 21a via the indoor side refrigerant adjusting device V1 and the pipe P2, and exchanges heat with indoor air in the dehumidifying heat exchanger 21a.
  • the remaining portion of the refrigerant transported to the mold prevention indoor unit 200 flows into the heating heat exchanger 21b through the indoor refrigerant control device V2 and the pipe P3. Heat is exchanged with indoor air in the heating heat exchanger 21b, and the mold prevention indoor unit 200 flows out through the pipe P3.
  • the refrigerant transported to the indoor unit 201 passes through the heat exchanger and the refrigerant adjusting device of the indoor unit 201 and merges with the refrigerant that has flowed out of the anti-mold indoor unit 200 via the pipe P2.
  • the refrigerant flows into the pipe P06 through the pipe P2, the closing valve VS2, the pipe P05, the outdoor flow direction switching device V0, and passes through the pipe P3, the closing valve VS3, the branch pipe DP, and the first refrigerant adjusting device V3 ′. It merges with the refrigerant that has flowed into the pipe P07. The merged refrigerant flows into the gas-liquid separator 11 and is sucked again by the compressor 12 through the pipe P01.
  • the first refrigerant control device V3 ′ When the air conditioner 1C is operated for a predetermined time in the cooling operation state and condensed water accumulates in the indoor heat exchange unit 21 (the dehumidifying heat exchanger 21a) and the mold prevention operation is performed, the first refrigerant control device V3 ′ Thus, the indoor heat exchange unit 21 (the heating heat exchanger 21b) is communicated with the discharge side of the compressor 12 through the branch pipe DP, and the state of the outdoor flow direction switching device V0 is maintained, and the operation of the indoor unit 201 is performed. (Ie, all indoor units are stopped), the second refrigerant regulator V5 is turned on, a part of the refrigerant is stored in the gas-liquid separator 11 and / or the outdoor heat exchanger 13, and the remaining refrigerant is prevented.
  • Step 2 is distributed to the mold operation circuit.
  • the compressor 12 is operated at a low frequency for a predetermined time (for example, a time during which the indoor heat exchange unit 21 can be surely dried) (here, the compressor rotation speed is set to the rated minimum operation speed). It can be set to a rotational speed between the required anti-fungal operation capacity) and then stopped.
  • the operating frequency and operating time of the compressor 12 are adjusted appropriately as required Good.
  • the flow of the refrigerant in the anti-mold operation circuit during the anti-mold operation is almost the same as that in the anti-mold operation in the third embodiment, it will not be repeated here.
  • step 1 and step 2 performed in the anti-mold operation of the air conditioner 1C the indoor refrigerant control device V1 corresponding to the dehumidifying heat exchanger 21a may be turned off.
  • the indoor unit includes a case provided with a discharge port and a wind guide plate disposed in the discharge port of the case, in order to realize the mold prevention effect more reliably, the air guide plate can be rotated to an operating position, that is, a position where the discharge port is not sealed.
  • the degree of opening and closing of the air guide plate is preferably less than 10 degrees, with the minimum limit being the degree to which the user cannot feel the wind and the moisture can be diffused to the outside.
  • bypass pipe BP is branched from the pipe P04.
  • the present invention is not limited to this, and the bypass pipe may be branched from the pipe P1.
  • the junction K0 between the pipe P3 and the pipe P2 is located between the indoor side refrigerant regulator V1 and the indoor heat exchange unit 21, but the present invention is not limited to this, and the indoor refrigerant regulator V1 is not limited thereto. May be arranged between the indoor heat exchanger 21 and the junction K0.
  • Embodiment 2 it shows in FIG. 3 so that a part of high pressure refrigerant
  • Such a structure may be used.
  • the number of indoor units is not restricted to this, One may be sufficient and three or more may be sufficient.
  • the outdoor refrigerant control device V4 is connected in series to the pipe P04 to control the flow rate of the refrigerant flowing through the outdoor heat exchanger 13, and the outdoor side Between the refrigerant
  • a drain pan may be disposed below the indoor heat exchange unit 21 closer to the heating heat exchanger 21b than to the dehumidifying heat exchanger 21a. In this way, it is possible to improve the evaporation effect of the condensed water accumulated in the dehumidifying heat exchanger 21a and to dry the drain pan.
  • a four-way valve is used as the first refrigerant regulator V3 '.
  • the present invention is not limited to this, and a three-way valve may be used.
  • Air conditioner apparatus 100 100 ′, 100 ′′ Outdoor unit 11 Gas-liquid separator 12 Compressor 13 Outdoor heat exchanger 14 Supercooling unit 200, 200 ′ Anti-mold indoor unit 201, 202 Indoor unit 21 Indoor heat exchange unit 21a Dehumidifying heat exchanger 21b Heating heat exchanger 22, 23 Dividers P01 to P07, P1 to P3 Pipe DP Branch pipe BP Bypass pipe V0 Outdoor flow direction switching device V1, V2 Indoor side refrigerant control device V3, V3 ′ first refrigerant regulator V4 outdoor refrigerant regulator V5 second refrigerant regulator VS1 to VS3 shutoff valve VK low pressure refrigerant control valve K0 junction 100X outdoor unit DOO 11X liquid separator 12X compressor 13X outdoor heat exchanger 200X, 201X, 202X indoor unit 21X indoor heat exchanger V0X four-way valve V1X indoor side refrigerant adjusting device

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air-Flow Control Members (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Other Air-Conditioning Systems (AREA)

Abstract

L'invention concerne un dispositif de conditionnement de l'air et son procédé de commande, lesquels permettent, après arrêt de l'opération de refroidissement, d'effectuer une opération contre les moisissure sans augmenter la charge d'un compresseur, et qui permettent également cette opération contre les moisissures sur une longue durée. Plus spécifiquement, ce dispositif (1, 1', 1A, 1B, 1C) de conditionnement de l'air comporte: un tuyau d'embranchement (DP) qui relie le côté décharge du compresseur (12) à l'unité (21) d'échange thermique intérieure, et dans lequel sont reliés en série des premiers dispositifs (V3, V3') de régulation du liquide frigorigène; ainsi qu'un tuyau de dérivation (BP) qui relie un séparateur (11) air-liquide et l'unité (21) d'échange thermique intérieure, et qui, avec le tuyau d'embranchement (DP), forme un circuit contre les moisissures et relie dans l'ordre le compresseur (12), l'unité (21) d'échange thermique intérieure et le séparateur (11) air-liquide.
PCT/JP2015/064650 2014-05-26 2015-05-21 Dispositif de conditionnement de l'air et procédé de commande associé WO2015182486A1 (fr)

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CN201410224654.2A CN105333638B (zh) 2014-05-26 2014-05-26 空调装置及其控制方法
CN201410224654.2 2014-05-26

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PCT/JP2015/064533 WO2015182461A1 (fr) 2014-05-26 2015-05-20 Équipement intérieur de climatisation
PCT/JP2015/064535 WO2015182463A1 (fr) 2014-05-26 2015-05-20 Appareil de conditionnement d'air
PCT/JP2015/064650 WO2015182486A1 (fr) 2014-05-26 2015-05-21 Dispositif de conditionnement de l'air et procédé de commande associé

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PCT/JP2015/064535 WO2015182463A1 (fr) 2014-05-26 2015-05-20 Appareil de conditionnement d'air

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CN107883601B (zh) * 2016-09-30 2020-07-07 大金工业株式会社 空调系统
CN107894111B (zh) * 2016-09-30 2020-10-02 大金工业株式会社 空调系统及其控制方法
CN110906454B (zh) * 2018-09-18 2021-07-27 青岛海尔空调器有限总公司 空调器及用于空调器的控制方法
CN112013474A (zh) * 2019-05-30 2020-12-01 广东美的制冷设备有限公司 空调器及其控制方法
CN111765567A (zh) * 2020-07-02 2020-10-13 珠海格力电器股份有限公司 一种空调系统及其控制方法
CN111998565B (zh) * 2020-08-13 2024-02-27 珠海格力电器股份有限公司 一种双温空调系统及其控制方法
KR102462774B1 (ko) * 2020-12-17 2022-11-02 엘지전자 주식회사 공기조화기
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JP6292304B2 (ja) 2018-03-14
CN105333638B (zh) 2018-09-21
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CN105333638A (zh) 2016-02-17
JP6292304B6 (ja) 2018-06-27
WO2015182461A1 (fr) 2015-12-03

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