JP2006038293A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of dispensing with a heater for regenerating a humidity absorbing member such as a desicant rotor or the like, and saving energy. <P>SOLUTION: As the heat is exchanged between a refrigerant of a first refrigerant circuit 40 and a refrigerant of a second refrigerant circuit 50 by a cascade condenser 33 of a refrigeration machine unit 30, and a second heat exchanger 16 is made to act as an evaporator by the second heating operation, the heat absorbed by the cooling operation of each refrigeration showcase 20 can be utilized in dehumidifying/cooling operation and heating operation, and further the heat absorbed by the second heat exchanger 16 can be utilized in the heating operation, when the heating load in a shop A is larger than the heat quantity of exhaust heat of the refrigeration showcase 20, thus the exhaust heat of the refrigeration showcase 20 conventionally discharged to the outside of the shop A, can be effectively utilized throughout the year, and the shortage of the heat quantity in the heating operation can be compensated by the second heat exchanger 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air conditioner that performs air conditioning in a store in which a refrigeration / refrigeration showcase such as a supermarket or a convenience store is installed.

  Conventionally, this type of air conditioner includes a first heat exchanger that exchanges heat with air flowing in the first ventilation path, and a second heat exchanger that exchanges heat with air flowing in the second ventilation path. A heat exchanger, a desiccant rotor as a hygroscopic member that adsorbs moisture in the air flowing through the first ventilation path and discharges it into the second ventilation path, and the compressor and the first heat exchanger and the first A refrigerant circuit that circulates the refrigerant in the second heat exchanger, cools the air that circulates in the first ventilation path by the refrigerant that circulates through the first heat exchanger, and supplies the air to a predetermined air-conditioned space. It is known that the air flowing through the second ventilation path is heated by the refrigerant flowing through the heat exchanger 2 to release the moisture of the desiccant rotor into the second ventilation path (for example, Patent Document 1).

In addition, freezer / refrigerated showcases are installed in stores such as supermarkets and convenience stores, and the refrigerant evaporated in the freezer / refrigerator showcase evaporator is installed in heat exchangers in refrigerators installed outside the store. The refrigerant is condensed by exchanging heat with the outside air.
JP 2003-227777 A

  However, in the conventional air conditioner, since the air flowing through the first ventilation path that exchanges heat with the first heat exchanger is dehumidified by the desiccant rotor, the first heat exchanger has only sensible heat. Heat exchange is performed, and the amount of heat for heating the air in the second ventilation path necessary for regenerating the desiccant rotor is insufficient. For this reason, it is necessary to provide a separate heater, and there is a problem that the amount of power consumption increases.

  Further, the heat released from the refrigerant in the heat exchanger for showcase is discharged to the outside, and there is a problem that the exhaust heat is not effectively used.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an air conditioner that can save energy without requiring a heater for regenerating a moisture absorbing member such as a desiccant rotor. Is to provide.

  In order to achieve the above object, the present invention provides a first heat exchanger for exchanging heat with air flowing in the first ventilation path, and a second for exchanging heat with air flowing in the second ventilation path. A heat exchanger, a moisture absorbing member that adsorbs moisture in the air flowing through the first ventilation path and releases it into the second ventilation path, and the first compressor and the second by the first compressor. In the air conditioner including the first refrigerant circuit for circulating the refrigerant to the heat exchanger, the refrigerant discharged from the second compressor is circulated through the expansion means to the evaporator of the other refrigeration equipment. The second refrigerant circuit sucked into the second compressor, the low-temperature side refrigerant sucked into the first compressor of the first refrigerant circuit, and the high-temperature side discharged from the second compressor of the second refrigerant circuit The third heat exchanger that exchanges heat with the refrigerant and the refrigerant discharged from the first compressor flow to the second heat exchanger without passing through the expansion means. And a part of the refrigerant discharged from the second heat exchanger is circulated to the first heat exchanger via the expansion means, and the expansion means is not circulated to the first heat exchanger. A refrigerant flow path for dehumidifying and cooling operation for cooling the air flowing through the first ventilation path by the first heat exchanger and the refrigerant discharged from the first compressor Is passed through the second heat exchanger without passing through the expansion means, and the refrigerant discharged from the second heat exchanger is passed through the first heat exchanger without going through the expansion means. A first refrigerant flow path for heating operation that heats the air flowing through the first ventilation path by the first heat exchanger by causing the refrigerant discharged from the refrigerant to flow to the third heat exchanger via the expansion means; The refrigerant discharged from the first compressor flows to the first heat exchanger without going through the expansion means. And a part of the refrigerant discharged from the first heat exchanger is circulated to the second heat exchanger via the expansion means, and the expansion means is not circulated to the second heat exchanger. The second heat-generating operation refrigerant flow path for heating the air flowing through the first ventilation path by the first heat exchanger by switching to the third heat exchanger, and switching for switching each refrigerant flow path Means.

  Thereby, in the 3rd heat exchanger, while the low temperature side refrigerant | coolant of a 1st refrigerant circuit and the high temperature side refrigerant | coolant of a 2nd refrigerant circuit are heat-exchanged, it switches to the 2nd refrigerant | coolant flow path for heating operation by a switching means. As a result, in the second heat exchanger, the low-temperature side refrigerant in the first refrigerant circuit is heat-exchanged with the air flowing through the second ventilation path, so that moisture in the moisture absorption member in the second ventilation path is removed from the second heat exchanger. The amount of heat for releasing into the second ventilation path and the amount of heat for heating the air flowing through the first ventilation path are supplied from other refrigeration equipment via the third heat exchanger, When the heating load is larger than the amount of heat supplied from other refrigeration equipment, the second heat exchanger acts as an evaporator, and the heat absorbed by the second and third heat exchangers is the first heat. High temperature side refrigerant and first ventilation path of first refrigerant circuit in exchanger It is used for heat exchange with the air flowing through.

  In addition, a first heat exchanger that exchanges heat with air flowing in the first ventilation path, a second heat exchanger that exchanges heat with the air flowing in the second ventilation path, and the first ventilation Refrigerant is circulated to the first heat exchanger and the second heat exchanger by a first compressor and a moisture absorbing member that adsorbs moisture in the air flowing through the passage and releases it into the second ventilation passage. In an air conditioner including a refrigerant circuit, an evaporator and a second compressor of another refrigeration device are connected to the refrigerant circuit, and a refrigerant discharged from the first and second compressors is supplied to the first refrigerant circuit. The heat exchanger, the second heat exchanger, and the evaporator are configured to circulate, and the refrigerant discharged from the first and second compressors is circulated to the second heat exchanger without the expansion means, While circulating a part of the refrigerant discharged from the second heat exchanger to the first heat exchanger via the expansion means, other refrigerants A refrigerant flow path for dehumidifying and cooling operation that cools the air flowing through the first ventilation path by the first heat exchanger by flowing through the expansion means without passing through the first heat exchanger; The refrigerant discharged from the second compressor is circulated to the second heat exchanger without passing through the expansion means without circulating the refrigerant by the first compressor and discharged from the second heat exchanger. Is passed through the first heat exchanger without passing through the expansion means, and the refrigerant discharged from the first heat exchanger is passed through the evaporator through the expansion means, so that the first heat exchanger causes the first heat exchanger to pass through the first heat exchanger. A first heating operation refrigerant circulation path for heating the air flowing through the ventilation path, and a refrigerant discharged from the first and second compressors to the first heat exchanger without passing through the expansion means; A part of the refrigerant discharged from the heat exchanger of the second is passed through the expansion means to the second Air flowing through the first ventilation path by the first heat exchanger by allowing the refrigerant to flow through the exchanger, and not through the second heat exchanger but through the expansion means via the expansion means. The second heating operation refrigerant circulation path for heating the refrigerant and switching means for switching each refrigerant circulation path.

  Thereby, the low-temperature side refrigerant of the refrigerant circuit is heat-exchanged in the evaporator of the other refrigeration equipment, and the refrigerant circuit in the second heat exchanger is switched by switching to the second heating operation refrigerant flow path by the switching means. Since the low-temperature side refrigerant is heat-exchanged with the air flowing through the second ventilation path, the amount of heat for releasing moisture of the moisture absorbing member in the second ventilation path into the second ventilation path and the first When the amount of heat for heating the air flowing through the ventilation path is supplied from the evaporator of the other refrigeration equipment, and the heating load of the air-conditioned space is larger than the amount of heat supplied from the other refrigeration equipment, the second The heat exchanger acts as an evaporator, and the heat absorbed by the second heat exchanger and the evaporator of the other refrigeration equipment passes through the high temperature side refrigerant and the first ventilation path of the refrigerant circuit in the first heat exchanger. Used for heat exchange with circulating air.

  According to the present invention, the heat absorbed by the cooling operation of the other refrigeration equipment can be used for the dehumidifying cooling operation and the heating operation, and the heating load of the air-conditioned space is larger than the heat quantity of the exhaust heat of the other refrigeration equipment. In some cases, the heat absorbed by the second heat exchanger can be used for heating operation, so that the exhaust heat of other refrigeration equipment that has been exhausted outside the air-conditioned space can be effectively used throughout the year. In addition, the second heat exchanger can compensate for the shortage of heat during heating operation.

  1 to 5 show an embodiment of the present invention. FIG. 1 is a refrigerant circuit diagram of an air conditioner, FIG. 2 is a block diagram showing a control system, and FIG. 3 is a refrigerant flow path during dehumidifying and cooling operation. FIG. 4 is a refrigerant circuit diagram showing the refrigerant flow path during the first heating operation, and FIG. 5 is a refrigerant circuit diagram showing the refrigerant flow path during the second heating operation.

  The air conditioner includes an air conditioning unit 10 that performs air conditioning in the store A, a plurality of refrigerated showcases 20 as other refrigeration devices installed in the store A, and the air conditioning unit 10 and each refrigerated showcase 20. A refrigerator unit 30 serving as each heat source, a first refrigerant circuit 40 constituting a refrigeration cycle on the air conditioning unit 10 side, a second refrigerant circuit 50 constituting a refrigeration cycle on the refrigerated showcase 20 side, It is comprised from the control part 60 which controls the temperature of the air-conditioning unit 10 and each refrigerated showcase 20, or a driving | operation.

  The air conditioning unit 10 includes a unit main body 11 installed in the back yard or machine room adjacent to the ceiling of the store A or adjacent to the store A, and a desiccant as a moisture absorbing member that dehumidifies the air in the store A during dehumidifying and cooling. The rotor 12, the air conditioner blower 13 that circulates the air in the store A, the first heat exchanger 14 that cools or heats the air in the store A, and the regeneration fan 15 that circulates the air outside the store A, And a second heat exchanger 16 for heating the air outside the store A.

  The unit body 11 includes a first ventilation path 11a and a second ventilation path 11b provided side by side by partitioning the inside thereof, and both end portions of the first ventilation path 11a and both end portions of the second ventilation path 11b. Each is provided with an opening to which a duct is connected. Further, both end portions of the first ventilation path 11a communicate with each other in the store A, and both end portions of the second ventilation path 11b communicate with each other outside the store A.

  The desiccant rotor 12 is made of a member in which an element 12a containing a hygroscopic agent such as silica gel or zeolite is formed in a disk shape, and is provided across the first ventilation path 11a and the second ventilation path 11b. Further, the desiccant rotor 12 rotates the element 12a between the first ventilation path 11a and the second ventilation path 11b by rotating the element 12a around the radial center by a motor (not shown). While moving.

  The air conditioner blower 13 is installed in the first ventilation path 11a, and circulates the air in the store A by circulating air from one end side to the other end side of the first ventilation path 11a. ing.

  The first heat exchanger 14 is provided on the downstream side of the desiccant rotor 12 in the first ventilation path 11a, and heats or cools the air in the store A dehumidified by the desiccant rotor 12.

  The regenerative blower 15 is installed in the second ventilation path 11b, and distributes the air outside the store A into the second ventilation path 11b in the direction opposite to the air flow direction in the first ventilation path 11a. It has become. Further, the regenerative blower 15 is configured to be able to change the blown amount.

  The second heat exchanger 16 is provided on the upstream side of the desiccant rotor 12 in the second ventilation path 11b, and heats or cools the air flowing through the second ventilation path 11b.

  Each refrigerated showcase 20 includes an open showcase with the front opened, a reach-in showcase that opens and closes the front with a glass door, and the like. Each refrigerated showcase 20 has an evaporation connected to the second refrigerant circuit 50 inside. A vessel 21 is provided. Further, an evaporator blower 22 is provided in each refrigerated showcase 20 to exchange heat between the air in each refrigerated showcase 20 and the refrigerant in the evaporator 21.

  The refrigerator unit 30 includes a first compressor 31 connected to the first refrigerant circuit 40, a second compressor 32 connected to the second refrigerant circuit 50, and a third heat exchanger. A well-known cascade condenser 33 is provided, and the cascade condenser 33 exchanges heat between the refrigerant in the first refrigerant circuit 40 and the refrigerant in the second refrigerant circuit 50. Further, on the discharge side of the cascade condenser 33 on the second refrigerant circuit 50 side, a condensation pressure adjustment valve 34 that can be adjusted so that the condensation pressure on the second refrigerant circuit 50 side of the cascade condenser 33 does not become a predetermined pressure or less. Is provided. Further, a liquid receiver 35 for temporarily storing the liquefied refrigerant is provided on the discharge side of the condensing pressure adjusting valve 34.

  As shown in FIG. 1, the first refrigerant circuit 40 includes a first heat exchanger 14, a second heat exchanger 16, a first compressor 31, a cascade condenser 33, a four-way valve 41, a first, a first, 2, 3rd, 4th and 5th electromagnetic valves 42a, 42b, 42c, 42d, 42e, 1st, 2nd, and 3rd expansion valves 43a, 43b, 43c are provided, and these are provided by piping for refrigerant circulation. It is connected. That is, the first refrigerant flow port of the four-way valve 41 is connected to the discharge side of the first compressor 31, and one end side of the second heat exchanger 16 is connected to the second refrigerant flow port of the four-way valve 41. Has been. One end side of the first heat exchanger 14 is connected to the other end side of the second heat exchanger 16, and a third refrigerant flow port of a four-way valve is connected to the other end side of the first heat exchanger 14. Has been. At this time, a first electromagnetic valve 42a and a first expansion valve 43a are provided in parallel between the other end side of the second heat exchanger 16 and one end side of the first heat exchanger 14, respectively. Between the first electromagnetic valve 42a and the first expansion valve 43a provided in parallel with each other and one end side of the first heat exchanger 14, the second electromagnetic valve 42b and the second expansion valve 43b are respectively provided. It is provided in parallel. The suction side of the cascade condenser 33 on the first refrigerant circuit 40 side is connected between the first electromagnetic valve 42a and the first expansion valve 43a and the second electromagnetic valve 42b and the second expansion valve 43b. The suction side of the first compressor 31 is connected to the discharge side of the cascade condenser 33. At this time, between the first solenoid valve 42a and the first expansion valve 43a and the second solenoid valve 42b and the second expansion valve 43b and the suction side of the cascade condenser 33 on the first refrigerant circuit 40 side. A third electromagnetic valve 42c is provided between them, and a third expansion valve 43c is provided on the cascade capacitor 33 side of the third electromagnetic valve 42c. Further, the fourth refrigerant flow port of the four-way valve 41 and the suction side of the first compressor 31 are connected, and a fourth electromagnetic valve 42d is provided between them. Further, the fourth refrigerant flow port of the four-way valve 41 and the fourth electromagnetic valve 42d and the third electromagnetic valve 42c and the third expansion valve 43c are connected, and the fifth electromagnetic valve is interposed between them. A valve 42e is provided.

  As shown in FIG. 1, the second refrigerant circuit 50 includes each evaporator 21, a second compressor 32, a cascade condenser 33, a condensing pressure adjustment valve 34, a liquid receiver 35, and a plurality of sixth electromagnetic valves 51. And a plurality of fourth expansion valves 52, which are connected by a refrigerant circulation pipe. That is, the suction side of the cascade condenser 33 on the second refrigerant circuit 50 side is connected to the discharge side of the second compressor 32, and the receiver 35 is connected to the discharge side of the cascade condenser 33 on the second refrigerant circuit 50 side. The suction side is connected. At this time, a condensing pressure adjusting valve 34 is provided between the discharge side of the cascade condenser 33 on the second refrigerant circuit 50 side and the suction side of the liquid receiver 35. The suction side of each evaporator 21 is connected in parallel to the discharge side of the liquid receiver 35, and the suction side of the second compressor 32 is connected in parallel to the discharge side of each evaporator 21. At this time, a sixth solenoid valve 51 is provided between the discharge side of the liquid receiver 35 and the suction side of each evaporator 21, and the sixth solenoid valve 51 is provided on the evaporator 21 side of each sixth solenoid valve 51. Four expansion valves 52 are provided.

  As shown in FIG. 2, the control unit 60 is composed of a microcomputer, and as shown in FIG. 2, the desiccant rotor 12, the air conditioner blower 13, the regeneration blower 15, the evaporator blower 22, the first compressor 31, the second compressor 32, and four-way The valve 41, the first, second, third, fourth, fifth and sixth electromagnetic valves 42a, 42b, 42c, 42d, 42e, 51 and the operation changeover switch 61 are connected.

  In the air conditioner configured as described above, when the dehumidifying and cooling operation is selected by the operation changeover switch 61, as shown in FIG. 3, the control unit 60 performs the desiccant rotor 12, the air-conditioning blower 13, and the regeneration blower 15. The evaporator blower 22, the first compressor 31, and the second compressor 32 are operated. Further, the control unit 60 communicates the first refrigerant flow port and the second refrigerant flow port of the four-way valve 41 and also communicates the third refrigerant flow port and the fourth refrigerant flow port, and the first and third refrigerant flow ports. The fourth solenoid valves 42a, 42c and 42d are opened, and the second and fifth solenoid valves 42b and 42e are closed. Thus, after the refrigerant discharged from the first compressor 31 flows to the second heat exchanger 16 via the four-way valve 41, a part of the refrigerant is the first electromagnetic valve 42a and the second expansion valve. The refrigerant flows through the first heat exchanger 14 through 43b, and the other refrigerant flows through the first condenser valve 42a, the third solenoid valve 42c, and the third expansion valve 43c to the cascade condenser 33. The refrigerant discharged from the first heat exchanger 14 is sucked into the first compressor 31 via the four-way valve 41 and the fourth electromagnetic valve 42d, and the refrigerant discharged from the cascade condenser 33 is also the first refrigerant. It is sucked into the compressor 31. The refrigerant discharged from the second compressor 32 circulates through the cascade condenser 33 and then circulates through each of the evaporators 21 via the sixth electromagnetic valve 51 and the fourth expansion valve 52. It is sucked into the compressor 32.

  At this time, the first electromagnetic valve 42a and the first expansion valve 43a, the second electromagnetic valve 42b and the second expansion valve 43b are connected in parallel to the first refrigerant circuit 40, and the electromagnetic valve is opened. As a result, the refrigerant can flow through the electromagnetic valve and the expansion valve. However, since the pressure loss of the refrigerant flowing through the opened solenoid valve is significantly smaller than that of the expansion valve, most of the circulating refrigerant flows through the solenoid valve without flowing through the expansion valve.

  In this manner, in the air conditioning unit 10, the return air (RA) circulated from the store A to the first ventilation path 11a by the air conditioner blower 13 is dehumidified by the desiccant rotor 12, and the dehumidified air is first heated. After cooling by exchanging heat with the exchanger 14, the air is supplied into the store A as supply air (SA). Further, the outside air (OA) circulated from the outside of the store A to the second ventilation path 11b by the regeneration fan 15 is heated by exchanging heat with the second heat exchanger 16, and the heated air contacts the desiccant rotor 12. As a result, the moisture adsorbed on the element 12a of the desiccant rotor 12 is evaporated. As a result, the element 12a of the desiccant rotor 12 is regenerated, and the air that has been used for regeneration and absorbed moisture is discharged outside the store A as exhaust (EA). In each refrigerated showcase 20, the air in the refrigerated showcase 20 is circulated by the evaporator blower 22, and the circulating air is cooled by the evaporator 21, thereby cooling the products in the refrigerated showcase 20.

  At this time, in the cascade capacitor 33 of the refrigerator unit 30, the refrigerant in the first refrigerant circuit 40 and the refrigerant in the second refrigerant circuit 50 exchange heat, and the refrigerant in the first refrigerant circuit 40 evaporates, The refrigerant in the second refrigerant circuit 50 condenses. As a result, the refrigerant in the first refrigerant circuit 40 absorbs heat necessary for heating the air flowing through the second ventilation path 11b by the first heat exchanger 14 and the cascade condenser 33, and discharges it to the outside in the past. The exhaust heat of the second refrigerant circuit 50 that has been used is effectively used.

  In addition, in order to prevent cold aisles caused by the cool air descending from the front opening of the refrigerated showcase 20 to the passage in front of the refrigerated showcase 20, the high-temperature and low-humidity supply air (SA) is supplied to the refrigerated showcase 20. It discharges toward the passage from the lower part. Thereby, the cold air descending from the refrigerated showcase 20 and the supply air (SA) are mixed, and the cold ale is eliminated.

  Next, the heating operation is selected by the operation changeover switch 61, and the amount of heat released from the second refrigerant circuit 50 side of the cascade condenser 33 by the heating load in the store A obtained by detecting the temperature in the store A, for example. If it is smaller than the first heating operation, as shown in FIG. 4, the controller 60 controls the air conditioner blower 13, the regeneration blower 15, the evaporator blower 22, the first compressor 31, and the second compression. The machine 32 is operated and the desiccant rotor 12 is stopped. In addition, the control unit 60 communicates the first refrigerant flow port and the second refrigerant flow port of the four-way valve 41 and also communicates the third refrigerant flow port and the fourth refrigerant flow port, and the first and second refrigerant flow ports. The fifth electromagnetic valves 42a, 42b and 42e are opened, and the third and fourth electromagnetic valves 42c and 42d are closed. As a result, the refrigerant discharged from the first compressor 31 flows to the second heat exchanger 16 via the four-way valve 41, and then passes through the first electromagnetic valve 42a and the second electromagnetic valve 42b. It distributes to the first heat exchanger 14. The refrigerant discharged from the first heat exchanger 14 flows to the cascade condenser 33 via the four-way valve 41, the fifth electromagnetic valve 42e, and the third expansion valve 43c, and the refrigerant discharged from the cascade condenser 33 is the first refrigerant. 1 is sucked into one compressor 31. The refrigerant discharged from the second compressor 32 circulates through the cascade condenser 33 and then circulates through each of the evaporators 21 via the sixth electromagnetic valve 51 and the fourth expansion valve 52. It is sucked into the compressor 32.

  Thus, in the air conditioning unit 10, the return air (RA) circulated from the store A to the first ventilation path 11 a by the air conditioning blower 13 is heated by exchanging heat with the first heat exchanger 14. Later, it is supplied into the store A as an air supply (SA). Further, the outside air (OA) circulated from outside the store A to the second ventilation path 11b by the regeneration fan 15 is heated by exchanging heat with the second heat exchanger 16, and the heated air is used as exhaust (EA). Discharge outside store A. In each refrigerated showcase 20, the air in the refrigerated showcase 20 is circulated by the evaporator blower 22, and the circulating air is cooled by the evaporator 21, thereby cooling the products in the refrigerated showcase 20.

  At this time, in the cascade condenser 33 of the refrigerator unit 30, the refrigerant in the first refrigerant circuit 40 and the refrigerant in the second refrigerant circuit 50 exchange heat, the refrigerant in the first refrigerant circuit 40 evaporates, The refrigerant in the second refrigerant circuit 50 condenses. As a result, the refrigerant in the first refrigerant circuit 40 absorbs heat necessary for heating the air flowing through the first ventilation path 40 from the second refrigerant circuit 50 by the cascade condenser 33 and is discharged to the outside air conventionally. The exhaust heat of the second refrigerant circuit 50 that has been used is effectively used. When the heating load in the store A is small, the amount of exchange heat of the first heat exchanger 14 is decreased by increasing the amount of air blown by the regeneration fan 15, and the heat absorbed in the cascade condenser 33 is second heat. It becomes possible to release heat as exhaust heat into the air flowing through the second ventilation path 11b by dissipating heat around the exchanger 16. When the heating load in the store A is large, the amount of heat exchanged by the second heat exchanger 16 is reduced by reducing the amount of air blown by the regeneration fan 15, and the heat absorbed in the cascade condenser 33 is reduced to the first heat. Heat can be radiated around the exchanger 14. Furthermore, by operating the desiccant rotor 12 during the heating operation, it is possible to perform the heating operation in the store A and to perform dehumidification.

  Moreover, the heating operation is selected by the operation changeover switch 61, and for example, the heating load in the store A obtained by detecting the temperature in the store A is based on the amount of heat released from the second refrigerant circuit 50 side of the cascade capacitor 33. As shown in FIG. 5, the control unit 60 performs the air conditioning blower 13, the regeneration blower 15, the evaporator blower 22, the first compressor 31, and the second compressor. 32 is operated and the desiccant rotor 12 is stopped. In addition, the control unit 60 communicates the first refrigerant circulation port and the fourth refrigerant circulation port of the four-way valve 41, and communicates the second refrigerant circulation port and the third refrigerant circulation port. The fourth solenoid valves 42b, 42c and 42d are opened, and the first and fifth solenoid valves 42a and 42e are closed. Thereby, after the refrigerant discharged from the first compressor 31 flows to the first heat exchanger 14 via the four-way valve 41, a part of the refrigerant becomes the second electromagnetic valve 42b and the first expansion. While circulating to the second heat exchanger 16 via the valve 43a, the other refrigerant flows to the cascade condenser 33 via the second solenoid valve 42b, the third solenoid valve 42c and the third expansion valve 43c. . The refrigerant discharged from the second heat exchanger 16 is sucked into the first compressor 31 via the four-way valve 41 and the fourth electromagnetic valve 42d, and the refrigerant discharged from the cascade condenser 33 is also the first refrigerant. It is sucked into the compressor 31. The refrigerant discharged from the second compressor 32 circulates through the cascade condenser 33 and then circulates through each of the evaporators 21 via the sixth electromagnetic valve 51 and the fourth expansion valve 52. It is sucked into the compressor 32.

  Thus, in the air conditioning unit 10, the return air (RA) circulated from the store A to the first ventilation path 11 a by the air conditioning blower 13 is heated by exchanging heat with the first heat exchanger 14. Later, it is supplied into the store A as an air supply (SA). Further, the outside air (OA) circulated from outside the store A to the second ventilation path 11b by the regeneration fan 15 is cooled by exchanging heat with the second heat exchanger 16, and the cooled air is used as exhaust (EA). Discharge outside store A. In each refrigerated showcase 20, the air in the refrigerated showcase 20 is circulated by the evaporator blower 22, and the circulating air is cooled by the evaporator 21, thereby cooling the products in the refrigerated showcase 20.

  At this time, in the cascade condenser 33 of the refrigerator unit 30, the refrigerant in the first refrigerant circuit 40 and the refrigerant in the second refrigerant circuit 50 exchange heat, the refrigerant in the first refrigerant circuit 40 evaporates, The refrigerant in the second refrigerant circuit 50 condenses. As a result, the refrigerant in the first refrigerant circuit 40 absorbs the amount of heat necessary to heat the air flowing through the first ventilation path 11a by the second heat exchanger 16 and the cascade condenser 33, and is discharged to the outside air conventionally. The exhaust heat of the second refrigerant circuit 50 that has been used is effectively used. When the heating load in the store A is large, the amount of exchange heat of the second heat exchanger 16 is increased by increasing the amount of air blown by the regeneration fan 15, and the second heat exchanger 16 and the cascade condenser 33 The absorbed heat can be dissipated in the first heat exchanger 14.

  Thus, according to the air conditioning apparatus of the present embodiment, the cascade condenser 33 of the refrigerator unit 30 exchanges heat between the refrigerant of the first refrigerant circuit 40 and the refrigerant of the second refrigerant circuit 50, and the second Since the second heat exchanger 16 is allowed to act as an evaporator by the heating operation, the heat absorbed by the cooling operation of each refrigerated showcase 20 can be used for the dehumidifying and cooling operation and the heating operation. When the heating load in A is larger than the heat quantity of the exhaust heat of the refrigerated showcase 20, the heat absorbed by the second heat exchanger 16 can be used for heating operation and is conventionally discharged outside the store A. The exhaust heat from the refrigerated showcase 20 can be effectively used throughout the year, and the second heat exchanger 16 can compensate for the shortage of heat in the heating operation. That.

  Further, when the heating load increases during the first heating operation of the air conditioning unit 10, the amount of air blown from the regeneration blower 15 is reduced, so that the heat absorbed in the cascade condenser 33 is mainly used in the first heat exchanger 14. Can be used for heat exchange, and sufficient heating capacity can be obtained.

  Further, since the condensing pressure adjusting valve 34 for adjusting the refrigeration-side condensing pressure of the cascade condenser 33 so as not to become a predetermined pressure or less is provided on the discharge side of the cascade condenser 33 on the second refrigerant circuit 50 side, the second refrigerant It is possible to prevent the difference between the condensation pressure and the evaporation pressure in the circuit 50 from becoming a predetermined pressure difference or less, and to prevent the cooling capacity of each refrigerated showcase 20 from being lowered.

  FIGS. 6 to 10 show other embodiments of the present invention. FIG. 6 is a refrigerant circuit diagram of an air conditioner, FIG. 7 is a block diagram showing a control system, and FIG. 8 is a refrigerant flow during dehumidifying and cooling operation. FIG. 9 is a refrigerant circuit diagram illustrating the refrigerant flow path during the first heating operation, and FIG. 10 is a refrigerant circuit diagram illustrating the refrigerant flow path during the second cooling operation. In addition, the same code | symbol is attached | subjected and shown to the component equivalent to the said embodiment.

  This air conditioner does not include the cascade condenser 33 as a heat source on the air conditioning unit 10 side and the refrigerated showcase 20 side as in the above embodiment, but constitutes a refrigeration cycle on the air conditioning unit 10 side and the refrigerated showcase 20 side. A refrigerant circuit 70 is provided.

  As shown in FIG. 6, the refrigerant circuit 70 includes a first heat exchanger 14, a second heat exchanger 16, each evaporator 21, a first compressor 31, a second compressor 32, and a four-way valve 71. , First, second, third, fourth and fifth electromagnetic valves 72a, 72b, 72c, 72d, 72e, first, second and third expansion valves 73a, 73b, 73c, which are refrigerants Connected by distribution piping. That is, the first refrigerant flow port of the four-way valve 71 is connected to the discharge side of the first compressor 31, and one end side of the second heat exchanger 16 is connected to the second refrigerant flow port of the four-way valve 71. Has been. One end side of the first heat exchanger 14 is connected to the other end side of the second heat exchanger 16, and a third refrigerant flow port of the four-way valve 71 is connected to the other end side of the first heat exchanger 14. It is connected. At this time, a first electromagnetic valve 72a and a first expansion valve 73a are provided in parallel between the other end side of the second heat exchanger 16 and one end side of the first heat exchanger 14, respectively. Between the first electromagnetic valve 72a and the first expansion valve 73a provided in parallel with each other and one end side of the first heat exchanger 14, the second electromagnetic valve 72b and the second expansion valve 73b are respectively provided. It is provided in parallel. The suction side of each evaporator 21 is connected in parallel between the first solenoid valve 72a and the first expansion valve 73a and the second solenoid valve 72b and the second expansion valve 73b, respectively. The discharge side of 21 is connected in parallel with the suction side of the second compressor 32. At this time, the third electromagnetic valve 72 a and the first expansion valve 73 a, the second electromagnetic valve 72 b and the second expansion valve 73 b, and between the suction side of each evaporator 21, the third electromagnetic valve A valve 72 c is provided, and a fifth electromagnetic valve 72 e is provided between the third electromagnetic valve 72 c and the suction side of each evaporator 21. A third expansion valve 73c is provided between the fifth electromagnetic valve 72e and the suction side of the evaporator 21. The discharge side of the second compressor 32 is connected between the discharge side of the first compressor 31 and the first refrigerant flow port of the four-way valve 71, and the fourth refrigerant flow port of the four-way valve 71 is connected to the discharge side of the second compressor 32. The suction side of the first compressor 31 is connected. Moreover, between the other end side of the 1st heat exchanger 14 and the 3rd refrigerant | coolant flow port of the four-way valve 71, between the 3rd solenoid valve 72c and each 5th solenoid valve 72e is connected, In the meantime, a fourth solenoid valve 72d is provided.

  As shown in FIG. 7, the control unit 80 includes a desiccant rotor 12, an air conditioner blower 13, a regeneration blower 15, an evaporator blower 22, a first compressor 31, a second compressor 32, a first and a second. The third, fourth and fifth electromagnetic valves 72a, 72b, 72c, 72d, 72e and the operation changeover switch 61 are connected.

  In the air conditioner configured as described above, when the dehumidifying and cooling operation is selected by the operation changeover switch 61, as shown in FIG. 8, the control unit 80 causes the desiccant rotor 12, the air-conditioning blower 13, and the regeneration blower 15 to operate. The evaporator blower 22, the first compressor 31, and the second compressor 32 are operated. In addition, the control unit 80 communicates the first refrigerant flow port and the second refrigerant flow port of the four-way valve 71 and also communicates the third refrigerant flow port and the fourth refrigerant flow port, and the first and third refrigerant flow ports. The fifth electromagnetic valves 72a, 72c and 72e are opened and the second and fourth electromagnetic valves 72b and 72d are closed. Thus, after the refrigerant discharged from the first compressor 31 and the second compressor 32 flows to the second heat exchanger 16 via the four-way valve 71, a part of the refrigerant is the first electromagnetic valve. The refrigerant flowing through the first heat exchanger 14 via the 72a and the second expansion valve 73b and discharged from the first heat exchanger 14 is sucked into the first compressor 31 via the four-way valve 71. . The other refrigerant flows through the first electromagnetic valve 72a, the third electromagnetic valve 72c, the fifth electromagnetic valve 72e, and the third expansion valve 73c to the evaporator 21, and is discharged from the evaporator 21. Is sucked into the second compressor 32.

  At this time, the first electromagnetic valve 72a and the first expansion valve 73a, the second electromagnetic valve 72b and the second expansion valve 73b are connected to the refrigerant circuit in parallel, and the refrigerant is released by opening the electromagnetic valve. Each can be distributed to the solenoid valve and the expansion valve. However, since the pressure loss of the refrigerant flowing through the opened solenoid valve is significantly smaller than that of the expansion valve, most of the circulating refrigerant flows through the solenoid valve without flowing through the expansion valve.

  In this manner, in the air conditioning unit 10, the return air (RA) circulated from the store A to the first ventilation path 11a by the air conditioner blower 13 is dehumidified by the desiccant rotor 12, and the dehumidified air is first heated. After cooling by exchanging heat with the exchanger 14, the air is supplied into the store A as supply air (SA). Further, the outside air (OA) circulated from the outside of the store A to the second ventilation path 11b by the regeneration fan 15 is heated by exchanging heat with the second heat exchanger 16, and the heated air contacts the desiccant rotor 12. As a result, the moisture adsorbed on the element 12a of the desiccant rotor 12 is evaporated. As a result, the element 12a of the desiccant rotor 12 is regenerated, and the air that has been used for regeneration and adsorbs moisture is discharged outside the store A as exhaust (EA). In each refrigerated showcase 20, the air in the refrigerated showcase 20 is circulated by the evaporator blower 22, and the circulating air is cooled by the evaporator 21, thereby cooling the products in the refrigerated showcase 20.

  At this time, the refrigerant in the refrigerant circuit 70 absorbs the amount of heat necessary to heat the air flowing through the second ventilation path 11b by the first heat exchanger 14 and the evaporator 21, and is conventionally discharged to the outside air. The exhaust heat of the refrigerated showcase 20 is effectively used.

  In addition, in order to prevent cold aisles caused by cold air descending from the front opening of the refrigerated showcase 20 to the passage in front of the refrigerated showcase 20, a high-temperature, low-humidity supply air (SA) is supplied to the refrigerated showcase 20. It discharges toward the passage from the lower part. Thereby, the cold air descending from the refrigerated showcase 20 and the supply air (SA) are mixed, and the cold ale is eliminated.

  Next, when the heating operation is selected by the operation changeover switch 61, for example, the heating load in the store A obtained by detecting the temperature in the store A is smaller than the amount of heat absorbed by the evaporator 21 of the refrigerated showcase 20 As shown in FIG. 9, the control unit 80 operates the air conditioning fan 13, the regeneration fan 15, the evaporation fan 22, and the second compressor 32 as the first heating operation. 1 compressor 31 is stopped. In addition, the control unit 80 communicates the first refrigerant flow port and the second refrigerant flow port of the four-way valve 71 and also communicates the third refrigerant flow port and the fourth refrigerant flow port, and the first and second refrigerant flow ports. The fourth and fifth electromagnetic valves 72a, 72b, 72d and 72e are opened, and the third electromagnetic valve 72c is closed. Thereby, the refrigerant discharged from the second compressor 32 flows to the second heat exchanger 16 through the four-way valve 71, and then passes through the first electromagnetic valve 72a and the second electromagnetic valve 72b. It distributes to the first heat exchanger 14. The refrigerant discharged from the first heat exchanger 14 circulates in the evaporator 21 via the fourth solenoid valve 72d, the fifth solenoid valve 72e, and the third expansion valve 73c, and is discharged from the evaporator 21. The refrigerant is sucked into the second compressor 32.

  Thus, in the air conditioning unit 10, the return air (RA) circulated from the store A to the first ventilation path 11 a by the air conditioning blower 13 is heated by exchanging heat with the first heat exchanger 14. Later, it is supplied into the store A as an air supply (SA). Further, the outside air (OA) circulated from outside the store A to the second ventilation path 11b by the regeneration fan 15 is heated by exchanging heat with the second heat exchanger 16, and the heated air is used as exhaust (EA). Discharge outside store A. In each refrigerated showcase 20, the air in the refrigerated showcase 20 is circulated by the evaporator blower 22, and the circulating air is cooled by the evaporator 21, thereby cooling the products in the refrigerated showcase 20.

  At this time, the refrigerant in the refrigerant circuit 70 absorbs the amount of heat necessary for heating the first ventilation path 11a by the evaporator 21, and the exhaust heat of the refrigerated showcase 20 that has been conventionally discharged to the outside air is effectively used. . When the heating load in the store A is small, the amount of heat exchanged by the first heat exchanger 14 is decreased by increasing the amount of air blown by the regeneration fan 15, and the amount of heat absorbed in the evaporator 21 is reduced to the second heat. It becomes possible to release heat as exhaust heat into the air flowing through the second ventilation path 11b by dissipating heat around the exchanger 16. When the heating load in the store A is large, the amount of exchange heat of the second heat exchanger 16 is reduced by reducing the amount of air blown from the regeneration fan 15, and the heat absorbed in the evaporator 21 is reduced to the first heat. Heat can be radiated around the exchanger 14. Furthermore, by operating the desiccant rotor 12 during the heating operation, it is possible to perform the heating operation in the store A and to perform dehumidification.

  Further, when the heating operation is selected by the operation changeover switch 61 and the heating load in the store A obtained by detecting the temperature in the store A, for example, is larger than the amount of heat absorbed by the evaporator 21 of the refrigerated showcase 20. As the second heating operation, as shown in FIG. 10, the control unit 80 operates the air conditioner blower 13, the regenerative blower 15, the evaporator blower 22, the first compressor 31, and the second compressor 32. Then, the desiccant rotor 12 is stopped. In addition, the control unit 80 communicates the first refrigerant circulation port and the fourth refrigerant circulation port of the four-way valve 71, and communicates the second refrigerant circulation port and the third refrigerant circulation port. The fifth electromagnetic valves 72b, 72c, 72e are opened and the first and fourth electromagnetic valves 73a, 73d are closed. Thereby, after the refrigerant discharged from the first compressor 31 and the second compressor 32 flows to the first heat exchanger 14 via the four-way valve 71, a part of the refrigerant becomes the second electromagnetic wave. The refrigerant flowing through the second heat exchanger 16 through the valve 72b and the first expansion valve 73a and discharged from the second heat exchanger 16 is sucked into the first compressor 31. Further, the other refrigerant flows to the evaporator 21 via the second electromagnetic valve 72b, the third electromagnetic valve 72c, the fifth electromagnetic valve 72e, and the third expansion valve 73c, and is discharged from the evaporator 21. Is sucked into the second compressor 32.

  Thus, in the air conditioning unit 10, the return air (RA) circulated from the store A to the first ventilation path 11 a by the air conditioning blower 13 is heated by exchanging heat with the first heat exchanger 14. Later, it is supplied into the store A as an air supply (SA). Further, the outside air (OA) circulated from outside the store A to the second ventilation path 11b by the regeneration fan 15 is cooled by exchanging heat with the second heat exchanger 16, and the cooled air is used as exhaust (EA). Discharge outside store A. In each refrigerated showcase 20, the air in the refrigerated showcase 20 is circulated by the evaporator blower 22, and the circulating air is cooled by the evaporator 21, thereby cooling the products in the refrigerated showcase 20.

  At this time, the refrigerant in the refrigerant circuit 70 absorbs the amount of heat necessary for heating the air flowing through the first ventilation path 11a by the second heat exchanger 16 and the evaporator 21, and has been discharged into the outside air conventionally. The exhaust heat of the refrigerated showcase 20 is effectively used. When the heating load in the store A is large, the amount of exchange heat of the second heat exchanger 16 is increased by increasing the amount of air blown from the regeneration blower 15, and the second heat exchanger 16 and the evaporator 21 The absorbed heat can be dissipated in the first heat exchanger 14.

  Thus, according to the air conditioning apparatus of the present embodiment, the refrigerant in the refrigerant circuit 70 is evaporated by the evaporator 21 of each refrigerated showcase 20, and the second heat exchanger 16 is evaporated by the second heating operation. Since the heat absorbed by the cooling operation of each refrigerated showcase 20 can be used for the dehumidifying and cooling operation and the heating operation, the heating load in the store A is the exhaust heat of the refrigerated showcase 20. The heat absorbed by the second heat exchanger 16 can be used for heating operation, and the exhaust heat of the refrigerated showcase 20 that has been exhausted outside the store A is effective throughout the year. The second heat exchanger 16 can make up for the shortage of heat in the heating operation.

  In the embodiment, the exhaust heat absorbed by the evaporator 21 of the second refrigerant circuit 50 due to the cooling in the refrigerated showcase 20 is absorbed by the refrigerant of the first refrigerant circuit 40 in the cascade capacitor 33. 11, the fourth heat exchanger 91 is provided in the second refrigerant circuit 50 in series or in parallel with the cascade capacitor 33, and the operation of the air conditioning unit 10 is stopped when the operation of the air conditioning unit 10 is stopped. The exhaust heat of each refrigerated showcase 20 may be released by closing the air and exchanging heat with the air outside the store A by the heat exchange fan 92. In this case, even when the operation of the first refrigerant circuit 40 is stopped, the operation of the second refrigerant circuit 50 can be continued by operating the blower 92 for heat exchange, and the air conditioning unit 10 is operated due to a failure or the like. Even if it is not possible, the cooling operation of the refrigerated showcase 20 can be continued as a backup.

  Moreover, in the said embodiment, the return air (RA) distribute | circulated from the shop A to the 1st ventilation path 11a with the air conditioner blower 13 is dehumidified with the desiccant rotor 12, and the 1st heat exchanger 14 dehumidifies the dehumidified air. The air is supplied to the store A as the supply air (SA) after being cooled with the heat exchange, and the outside air (OA) circulated from the outside of the store A to the second ventilation path 11b by the regeneration fan 15 is supplied to the second heat. Heat is exchanged with the exchanger 16 and heated, and the heated air is brought into contact with the element 12a of the desiccant rotor 12 to regenerate the desiccant rotor 12 that has absorbed moisture, and the air used for the regeneration is discharged to the outside as exhaust (EA). As shown in FIG. 12, the sensible heat exchanger 94 provided over the first and second ventilation paths 11a and 11b is used. Thus, heat is exchanged between the air before heat exchange with the first heat exchanger 14 in the first ventilation path 11a and the air before heat exchange with the second heat exchanger 16 in the second ventilation path 11b. You may do it. In this case, the return air (RA) is dehumidified by the desiccant rotor 12 so that the absolute humidity of the air is decreased but the temperature is increased. Therefore, the dehumidified air and the outside air (OA) are heated by the sensible heat exchanger 94. By exchanging, the air flowing through the first ventilation path 11a is cooled, and the air flowing through the second ventilation path 11b is heated. Thereby, it is possible to exchange heat with the first heat exchanger 14 without increasing the temperature of the air dehumidified by the desiccant rotor 12.

  Moreover, in the said embodiment, although what showed the 1st heat exchanger 14 of the air conditioning unit 10 arrange | positioned 12 downstream of a desiccant rotor was shown, the 1st heat exchanger 14 is arrange | positioned upstream of a desiccant rotor. You may do it. In this case, by cooling the return air (RA) in the desiccant rotor 12 before dehumidification, the relative humidity can be increased, and the dehumidification efficiency of the desiccant rotor 12 can be improved.

  In the above-described embodiment, the exhaust heat of the refrigerated showcase 20 is supplied to the air conditioning unit 10 by the set of first refrigerant circuits 40. However, the plurality of first refrigerant circuits 40 are arranged in parallel. Alternatively, the exhaust heat of the refrigerated showcase 20 may be supplied to the air conditioning unit 10 by connecting in series.

  In the embodiment, the heat absorbed by the refrigerant by the cooling operation of the refrigerated showcase 20 is supplied to the air conditioning unit 10, but the cooling operation of the system constituting the refrigeration showcase and other cooling circuits is shown. The exhaust heat may be supplied to the air conditioning unit 10.

The refrigerant circuit diagram of the air conditioning apparatus which shows one Embodiment of this invention Block diagram showing the control system Refrigerant circuit diagram showing refrigerant flow path during dehumidifying and cooling operation Refrigerant circuit diagram showing refrigerant flow path during first heating operation Refrigerant circuit diagram showing refrigerant flow path during second heating operation The refrigerant circuit diagram of the air conditioning apparatus which shows other embodiment of this invention. Block diagram showing the control system Refrigerant circuit diagram showing refrigerant flow path during dehumidifying and cooling operation Refrigerant circuit diagram showing refrigerant flow path during first heating operation Refrigerant circuit diagram showing the refrigerant flow path during the second cooling operation Refrigerant circuit diagram of an air conditioner showing another embodiment Refrigerant circuit diagram of an air conditioner showing another embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Air conditioning unit, 11a ... 1st ventilation path, 11b ... 2nd ventilation path, 12 ... Desiccant rotor, 14 ... 1st heat exchanger, 15 ... Blower for reproduction | regeneration, 16 ... 2nd heat exchanger, DESCRIPTION OF SYMBOLS 21 ... Evaporator, 30 ... Refrigerator unit, 31 ... 1st compressor, 32 ... 2nd compressor, 33 ... Cascade condenser, 34 ... Condensation pressure regulating valve, 40 ... 1st refrigerant circuit, 50 ... 1st 2 refrigerant circuits, 60 ... control unit, 70 ... refrigerant circuit, 80 ... control unit, A ... store.

Claims (5)

A first heat exchanger for exchanging heat with air flowing in the first ventilation path, a second heat exchanger for exchanging heat with air flowing in the second ventilation path, and in the first ventilation path A moisture absorbing member that adsorbs moisture in the air flowing through the air and releases it into the second ventilation path, and a first compressor that circulates the refrigerant to the first heat exchanger and the second heat exchanger by the first compressor. In an air conditioner equipped with a refrigerant circuit of
A second refrigerant circuit that circulates the refrigerant discharged from the second compressor to the evaporator of the other refrigeration equipment via the expansion means and sucks it into the second compressor;
A third heat exchanger for exchanging heat between the low temperature side refrigerant sucked into the first compressor of the first refrigerant circuit and the high temperature side refrigerant discharged from the second compressor of the second refrigerant circuit;
The refrigerant discharged from the first compressor is circulated through the second heat exchanger without passing through the expansion means, and a part of the refrigerant discharged from the second heat exchanger is exchanged through the expansion means through the first heat exchange. Circulate through the first heat exchanger without causing the other refrigerant to circulate through the first heat exchanger and through the third heat exchanger via the expansion means. A refrigerant flow path for dehumidifying and cooling operation for cooling the circulating air;
The refrigerant discharged from the first compressor is circulated to the second heat exchanger without passing through the expansion means, and the refrigerant discharged from the second heat exchanger is transferred to the first heat exchanger without passing through the expansion means. A first heat exchanger is used to heat the air flowing through the first ventilation path by circulating the refrigerant discharged from the first heat exchanger through the expansion means to the third heat exchanger. 1 refrigerant distribution route for heating operation,
The refrigerant discharged from the first compressor is circulated through the first heat exchanger without passing through the expansion means, and a part of the refrigerant discharged from the first heat exchanger is exchanged through the expansion means as the second heat exchange. The first heat exchanger causes the first ventilation path to flow through the third heat exchanger through the expansion means without causing the other refrigerant to flow through the second heat exchanger. A second refrigerant distribution path for heating operation for heating the circulating air;
An air conditioning apparatus comprising switching means for switching each refrigerant flow path. A first heat exchanger for exchanging heat with air flowing in the first ventilation path, a second heat exchanger for exchanging heat with air flowing in the second ventilation path, and in the first ventilation path A moisture absorbing member that adsorbs moisture in the air flowing through the air and releases it into the second ventilation path, and a refrigerant circuit that circulates the refrigerant to the first heat exchanger and the second heat exchanger by the first compressor In an air conditioner equipped with
The refrigerant circuit is connected to an evaporator and a second compressor of another refrigeration device, and the refrigerant discharged from the first and second compressors is supplied to the first heat exchanger, the second heat exchanger, and Configured to circulate the evaporator,
The refrigerant discharged from the first and second compressors is circulated through the second heat exchanger without passing through the expansion means, and a part of the refrigerant discharged from the second heat exchanger is passed through the expansion means through the first expansion means. The first heat exchanger circulates the first ventilation path by circulating the other refrigerant to the evaporator via the expansion means without circulating the other refrigerant to the first heat exchanger. A refrigerant flow path for dehumidifying and cooling operation for cooling the air to be
Without circulating the refrigerant by the first compressor, the refrigerant discharged from the second compressor is circulated to the second heat exchanger without passing through the expansion means, and the refrigerant discharged from the second heat exchanger is The first heat exchanger causes the first ventilation to flow through the first heat exchanger without passing through the expansion means, and the refrigerant discharged from the first heat exchanger flows through the expansion means through the evaporator. A first heating operation refrigerant distribution path for heating air flowing through the path;
The refrigerant discharged from the first and second compressors is circulated through the first heat exchanger without passing through the expansion means, and a part of the refrigerant discharged from the first heat exchanger is passed through the expansion means through the second means. The first heat exchanger circulates the first ventilation path by circulating the refrigerant through the expansion means via the expansion means without circulating the other refrigerant through the second heat exchanger. A second heating operation refrigerant circulation path for heating the air to be
An air conditioning apparatus comprising switching means for switching each refrigerant flow path. An air volume adjustable air blower provided in the second ventilation path;
2. A control means for decreasing the air volume of the blower when the heating load increases during the first heating operation and increasing the air volume of the blower when the heating load increases during the second heating operation. Or the air conditioning apparatus of 2. The air conditioner according to claim 1 or 3, further comprising a fourth heat exchanger capable of exchanging heat between the high temperature side refrigerant of the second refrigerant circuit and the outside air. 5. The air conditioner according to claim 1, 3 or 4, further comprising a condensing pressure adjusting unit capable of adjusting a condensing pressure on the second refrigerant circuit side in the third heat exchanger to a predetermined pressure or higher.

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