JPH0674589A - Multichamber room cooler/heater - Google Patents

Abstract

PURPOSE:To improve the energy conservation and comfortableness by allowing an operation of a user side refrigerant cycle without switching even if an operation of a heat source side heat exchanger is varied with respect to a load change in room cooling/heating concurrent operations. CONSTITUTION:The multichannel room cooler/heater comprises a heat source side refrigerant cycle 57''', a room heating user side refrigerant cycle 68 for room heating mainly through a room heating second auxiliary heat exchanger 58 formed integrally with a room heating first auxiliary heat exchanger 51, and a room cooling user side refrigerant cycle 70 for room cooling mainly through a room cooling secondary auxiliary heat exchanger 60 formed integrally with a room cooling first auxiliary heat exchanger 55.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-chamber cooling / heating apparatus separated into a heat source side refrigerant cycle and a use side refrigerant cycle.

[0002]

2. Description of the Related Art As a conventional technique, Japanese Patent Laid-Open No. 1-2753
There is a multi-room air conditioner as known from JP-A-14.

A conventional technique will be described below with reference to the drawings. 4, 31 is a compressor, 32 is a four-way valve, 33 is a third auxiliary heat exchanger, 33a is an auxiliary control valve for controlling the flow rate of the refrigerant to the third heat exchanger 33, 34 is a heat source side heat exchanger, 34a is a main control valve that controls the flow rate of the refrigerant to the heat source side heat exchanger 34, 35 is a pressure reducing device, and 36 is a first auxiliary heat exchanger that connects these in an annular shape to form a heat source side refrigerant cycle.

A second auxiliary heat exchanger 37 is integrally formed so as to exchange heat with the first auxiliary heat exchanger 36. 38
Has a reversible characteristic that the refrigerant outflow directions are opposite during cooling and heating in the first refrigerant transfer device.

Reference numeral 39 denotes a fourth auxiliary heat exchanger which is integrally formed with the third auxiliary heat exchanger 33 and exchanges heat. Reference numeral 40 denotes a second refrigerant transfer device, which is a reversible device in which the refrigerant outflow directions are opposite during cooling and heating. It has characteristics and these are housed in the outdoor unit 41.

42a and 42b are first heat exchangers on the utilization side, 4
5a and 45b are first flow valves that control the flow rate of the refrigerant flowing into the first utilization side heat exchangers 42a and 42b.
b is a second use side heat exchanger, and 48a and 48b are second flow rate valves for controlling the flow rates of the refrigerant to the second use side heat exchangers 47a and 47b, respectively. These are indoor units 43a and 4b.
It is stored in 3b.

The second auxiliary heat exchanger 37, the first refrigerant transfer device 38, the first flow valves 45a and 45b, the first use side heat exchangers 42a and 42b, and the first pipes 44a and 44b are annularly connected to each other, The first use-side refrigerant cycle 49 is formed.

The fourth auxiliary heat exchanger 39, the second refrigerant transfer device 40, the second flow rate valves 48a and 48b, the second use side heat exchangers 46a and 46b, and the second pipes 47a and 47b are connected in an annular shape. The second utilization side refrigerant cycle is formed 50.

Next, the operation of the multi-room cooling and heating apparatus configured as described above will be described. Indoor units 43a, 4
When both 3b are in the cooling operation, the heat source side refrigerant cycle 57
Then, the auxiliary control valve 33a is closed, the high temperature and high pressure from the compressor 31 passes through the four-way valve 32, radiates heat in the heat source side heat exchanger 34 to be condensed and liquefied, and is decompressed by the pressure reducing valve 35 to be the first auxiliary heat exchanger. It vaporizes at 36 and circulates through the four-way valve 32 to the compressor 31. At this time, the second auxiliary heat exchanger 37 and the first auxiliary heat exchanger 36 of the first usage-side refrigerant cycle 49 exchange heat and are sent to the first refrigerant carrier device 38, where the first refrigerant carrier device 38 The first flow valves 45a, 4a through the refrigerant pipe 44a.
5b, the flow rate of which is appropriately controlled and sent to the first use side heat exchangers 42a and 42b to endothermically evaporate and gasify to the first
It circulates to the second auxiliary heat exchanger 37 through the pipe 44b.

At this time, for example, when heating the indoor unit 43a, the auxiliary control valve 33a is opened, the first flow valve 45a is closed, and the second use-side refrigerant cycle 50 is operated. That is, the second refrigerant sent from the second refrigerant transfer device 40
The refrigerant of the use side refrigerant cycle 50 is the fourth auxiliary heat exchanger 3
9 and is heated and gasified by the third auxiliary heat exchanger 33,
It is sent to the second use side heat exchanger 46a through the second pipe 47b, the flow rate is controlled by the second flow valve 48a, and heating is performed while condensing and liquefying, and is circulated to the second refrigerant transfer device 40 through the second pipe 47a. To do. At this time, the capacity of the second usage-side refrigerant cycle 50 can be controlled by adjusting the opening degree of the main control valve 48a.

On the other hand, when both the indoor units 43a and 43b are in the heating operation, in the heat source side refrigerant cycle 57, the high-temperature high-pressure refrigerant from the compressor 31 is sent from the four-way valve 32 to the first auxiliary heat exchanger 36 to radiate heat. Then, it is condensed and liquefied, decompressed by the decompression device 35, absorbed and evaporated by the heat source side heat exchanger 34, and circulated to the compressor 31 through the four-way valve 32. At this time, the second auxiliary heat exchanger 37 and the first auxiliary heat exchanger 36 of the first usage-side refrigerant cycle 49 exchange heat, and the first usage-side refrigerant cycle 4
The liquid refrigerant in 9 is heated and gasified, is sent to the first use side heat exchangers 42a and 42b through the first pipe 44b, and is heated while appropriately controlling the flow rate with the first flow valves 45a and 45b. The heat is liquefied, is sent to the first refrigerant transfer device 38 through the first pipe 44a, and is circulated to the second auxiliary heat exchanger 37.

At this time, for example, when the indoor unit 43a is cooled, the auxiliary control valve 33a is opened, the first flow valve 45a is closed, and the second use-side refrigerant cycle 50 is operated. That is, the refrigerant liquefied by the third auxiliary heat exchanger 33 in the fourth auxiliary heat exchanger 39 is sent to the second pipe 47a by the second refrigerant transfer device 40, and the flow rate is appropriately controlled by the second flow valve 48a. The second auxiliary heat exchanger 39 is sent to the second use side heat exchanger 46a, evaporatively cooled and gasified to the second pipe 47b.
Circulate to.

Heat source side refrigerant cycle 57 during this heating operation
Then, the heat source side heat exchanger 3 is adjusted by adjusting the opening degree of the main control valve 34a.
The amount of evaporation of No. 4 is controlled, and the amount of heat exchange between the third auxiliary heat exchanger 33 and the fourth auxiliary heat exchanger 39 is controlled.

[0014]

However, in the above-described conventional configuration, the first source-side refrigerant cycle 49 is in the heating operation and the second source-side refrigerant cycle 50 is in the cooling operation in the heat source side refrigerant cycle 57. Therefore, when the cooling load exceeds the heating load, it may be necessary to use the heat source side heat exchanger 34 as a condenser in order to secure the cooling capacity.

At that time, it is necessary to switch the four-way valve 32 to perform the cooling operation of the first utilization side cycle 49 and the heating operation of the second utilization side refrigerant cycle 50.

For this reason, the first use-side refrigerant cycle 49 that has been in the heating operation must be in the cooling operation, and the first refrigerant cycle 49 must be removed after the latent heat and sensible heat of the refrigerant in the first refrigerant cycle 49 have been removed. I can't operate air conditioning.

Therefore, there is a problem in energy saving and there is a problem in comfort because the cooling operation cannot be quickly performed when the cooling operation is required.

It is an object of the present invention to improve energy saving and comfort by coping without changing the cooling and heating operation of the use side cycle even when the load changes during the simultaneous cooling and heating operation. Has an aim.

Another object of the present invention is to improve energy saving and comfort by coping with a load fluctuation during the simultaneous cooling / heating operation without switching the cooling / heating operation of the use side cycle. At the same time, when only the cooling load is used, the cooling-use cycle and the heating-use refrigerant cycle are simultaneously cooled to increase the cooling-use side heat exchanger area and effectively use the air conditioning equipment. The purpose is to cope with peak load in summer by improving capacity and operation efficiency.

Further, another object of the present invention is to improve energy saving and comfort by coping without changing the cooling and heating operation of the use side cycle even when the load changes during the simultaneous cooling and heating operation. In addition to improving, when only the cooling load is used, the cooling-use side refrigerant cycle and the heating-use side refrigerant cycle can be operated in the cooling mode at the same time to increase the cooling-use side heat exchanger area and make the air conditioning equipment effective. It supports peak load in the summer by improving cooling capacity and operating efficiency by using
Further, in the case of only the heating load, the purpose is to effectively utilize the equipment by simultaneously performing the heating operation of the cooling use side refrigerant cycle and the heating use side refrigerant cycle.

[0021]

In order to achieve this object, a multi-chamber cooling and heating apparatus of the present invention is provided with a compressor, a first auxiliary heat exchanger for heating, and a first auxiliary heat exchanger for heating. A capacity control valve installed to control the amount of heat exchange of the first auxiliary heat exchanger for heating, a heat source side heat exchanger, and an inlet of the heat source side heat exchanger for using the heat source side heat exchanger as an evaporator A first depressurizing device installed in the, a second depressurizing device installed at the outlet of the heat source side heat exchanger for using the heat source side heat exchanger as a condenser, and a first cooling auxiliary heat exchanger. A heat source side refrigerant cycle connected to the above, and a heating second auxiliary heat exchanger that is integrally formed with the heating first auxiliary heat exchanger to exchange heat, a heating refrigerant transfer device, and a plurality of heating use sides. A heating-use side refrigerant cycle comprising a heat exchanger and the cooling first auxiliary heat exchange Formed integrally with the second auxiliary heat exchanger for cooling the heat exchange for cooling the refrigerant conveying system, and is configured from the cooling the use-side refrigerant cycle comprising a plurality of the cooling utilization side heat exchanger.

Further, the compressor, the first auxiliary heat exchanger for heating,
A first electromagnetic valve for cooling, which is installed between the compressor and the first auxiliary heat exchanger for heating and is closed when the first auxiliary heat exchanger for heating is used as an evaporator, the first auxiliary for heating A first expansion valve for controlling the capacity of the heat exchanger, a first auxiliary heat exchanger for cooling, a first auxiliary heat exchanger for cooling installed between the first expansion valve and the first auxiliary heat exchanger for cooling Expansion valve for controlling the capacity of the heat source, heat source side heat exchanger, the heat source side heat exchanger provided between the first expansion valve and the second expansion valve in the middle of the pipe communicating the heat source side heat exchanger A second expansion valve that controls the capacity of the exchanger, an evaporation circuit that communicates between the first auxiliary heat exchanger for cooling and the compressor and the heat source side heat exchanger, and the heat source provided in the middle of the evaporation circuit An electromagnetic valve for evaporation that opens when the side heat exchanger is used as an evaporator, the first electromagnetic valve for cooling, and A condenser circuit for communicating between the compressor and the heat source side heat exchanger, a condensing solenoid valve provided in the middle of the condenser circuit and closed when the heat source side heat exchanger is used as a condenser, the first The first auxiliary heat exchanger for heating is provided in the middle of a pipe connecting between the electromagnetic valve for cooling and the first auxiliary heat exchanger for heating and the first auxiliary heat exchanger for cooling and the evaporation circuit pipe. Source side cycle consisting of a second solenoid valve for cooling, which opens when the air conditioner is used as a condenser, and a second auxiliary heat exchanger for heating formed integrally with the first auxiliary heat exchanger for heating. A heating-use refrigerant carrier, a heating-use refrigerant cycle comprising a plurality of heating-use heat exchangers, and a cooling second auxiliary heat which is integrally formed with the cooling first auxiliary heat exchanger to exchange heat. Exchanger, cooling medium carrier for cooling,
The cooling-use side refrigerant cycle is composed of a plurality of cooling-use side heat exchangers.

Further, there is provided a heating solenoid valve which is installed between the evaporation circuit tube and the first heating auxiliary heat exchanger and is closed when the first heating auxiliary heat exchanger is used as an evaporator. It is a thing.

[0024]

With the above-described structure, the present invention can cope with load fluctuations during simultaneous cooling and heating operation without switching between cooling and heating operations in the use side cycle.

Further, according to the above-described structure, the present invention can cope with the load fluctuation during the simultaneous cooling and heating operation without switching the cooling and heating operations of the use side cycle, and in the case of only the cooling load, The cooling-use side refrigerant cycle and the heating-use side refrigerant cycle can be simultaneously cooled.

Furthermore, the present invention has the above-mentioned structure.
Even if there is a load change during simultaneous cooling and heating operation, it can be handled without switching between cooling and heating operation of the user side cycle,
In the case of only the cooling load, the cooling use side cycle and the heating use side refrigerant cycle can be simultaneously operated in the cooling operation, and in the case of only the heating load, the cooling use side refrigerant cycle and the heating use side refrigerant cycle. The cycle can be heated at the same time.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a refrigerant cycle diagram of the multi-room cooling and heating apparatus according to the first embodiment.

In FIG. 1, reference numeral 51 is a first auxiliary heat exchanger for heating. Reference numeral 52 is a first pressure reducing device. 53 is a heat source side heat exchanger. 54 is a second pressure reducing device. Reference numeral 55 is a first auxiliary heat exchanger for cooling. Reference numeral 56 is a capacity control valve that bypasses the first heating auxiliary heat exchanger 51 for capacity control.

These are annularly connected to form a heat source side refrigerant cycle 57 '. Reference numeral 58 denotes a heating second auxiliary heat exchanger, which uses a laminated heat exchanger integrally formed so as to exchange heat with the heating first auxiliary heat exchanger 51. 5
Reference numeral 9 is a heating refrigerant transfer device, 60 is a second cooling auxiliary heat exchanger, and is integrally formed so as to exchange heat with the first cooling auxiliary heat exchanger 55. Reference numeral 61 is a cooling medium transfer device.

The heat source side refrigerant cycle 57, the heating second auxiliary heat exchanger 51, the heating refrigerant transfer device 59, the cooling second auxiliary heat exchanger 60, and the cooling refrigerant transfer device 61 are housed in the heat source unit 41 '. ing.

Reference numerals 62a and 62b are heating side heat exchangers, and 63a and 63b are heating capacity control valves.

Reference numerals 64a and 64b are cooling side heat exchangers, and 65a and 65b are cooling capacity control valves.

The heating side heat exchangers 62a and 62b, the heating capacity control valves 63a and 63b, the cooling side heat exchangers 64a and 64b, and the cooling capacity control valves 65a and 65b are housed in the indoor units 66a and 66b. Has been done.

The second auxiliary heat exchanger for heating 58, the heating refrigerant transfer device 59, and the heating side heat exchangers 62a and 62b are connected in a ring shape by the first connecting pipes 67a and 67b. Is formed.

The second auxiliary heat exchanger for cooling 60, the cooling medium transfer device 61, and the cooling side heat exchangers 64a and 64b are annularly connected by the second connecting pipes 69a and 69b to cool the cooling side refrigerant cycle. 70 is formed.

In the multi-room cooling and heating apparatus configured as described above, the load changes during simultaneous operation of cooling and heating, which is a problem here, and the function of the heat source side heat exchanger 53 is changed from the condenser to the evaporator or The operation when the evaporator needs to be changed to the condenser will be described.

First, consider a case in which the heating load is large at the start of operation and then the cooling load increases, and the function of the heat source side heat exchanger 53 is changed from the evaporator to the condenser.

At the start of the operation, the capacity control valve 56 is closed, the second pressure reducing device 54 is fully opened, and the heat source side heat exchanger 53 is used as an evaporator.

In the heat source side refrigerant cycle 57, the compressor 31
The high-temperature and high-pressure gas discharged from the heat-dissipating unit radiates heat in the first auxiliary heat exchanger 51 for heating to be condensed and liquefied, and then passes through the second pressure reducing device whose pressure is reduced by the first pressure reducing device 52. Since the second pressure reducing device 54 is fully opened, the state of the refrigerant does not change here.

The heat source side heat exchanger 53 and the cooling first auxiliary heat exchanger 55 absorb heat to evaporate and return to the compressor 1.

At this time, in the heating use side refrigerant cycle 68, the refrigerant discharged from the heating refrigerant transfer device 59 is the second heating refrigerant.
The auxiliary heat exchanger 58 absorbs heat from the first heating auxiliary heat exchanger 51 to increase the dryness. After that, it is sent to the heating use side heat exchangers 62a and 62b to radiate heat to the indoor air to reduce the dryness, and the flow rate is adjusted by the heating capacity control valves 63a and 63b, and then the heating refrigerant transfer device 59 is returned.

On the other hand, in the cooling-use side refrigerant cycle 70, the flow rate of the refrigerant discharged from the cooling-use refrigerant carrier device 61 is adjusted by the cooling capacity control valves 65a and 65b, and the indoors in the cooling-use side heat exchangers 64a and 64b. It absorbs heat from the air and becomes more dry. Then, it is sent to the cooling second auxiliary heat exchanger 60 and radiates heat to the cooling first auxiliary heat exchanger 55 to reduce the dryness, and then returns to the cooling refrigerant transfer device 61.

When the load changes during simultaneous heating operation and the function of the heat source side heat exchanger 53 has to be changed from the condenser to the evaporator, the second decompression device 54, which has been fully open until then, is used. This can be dealt with by fully opening the throttle and the first pressure reducing device 52.

The other operations are the same as those before the load is changed, and the description thereof will be omitted. In addition, the heat source side heat exchanger 5
The case where the function of 3 is changed from the condenser to the evaporator can be easily estimated, and the description thereof is omitted here.

According to the first embodiment, the heat source side heat exchanger 5 is controlled by controlling the opening of the first pressure reducing device 52 and the second pressure reducing device 54.
By changing the function of 3 to the condenser and the evaporator, the heating use side cycle 68 is cooled, and the cooling use side cycle 70 is not heated.
Since the cooling operation and the heating operation can be performed according to the heat loads of a and 66b, energy saving and comfort can be improved.

Next, the second embodiment will be described. FIG. 2 is a refrigerant cycle diagram of the multi-room cooling and heating apparatus according to the second embodiment of the present invention. In FIG. 2, the same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

Reference numeral 71 denotes a condensing electromagnetic valve which is opened when the heat source side heat exchanger 53 is used as a condenser, 72 is an evaporation electromagnetic valve which is opened when the heat source side heat exchanger 53 is used as an evaporator, and 73 is a heat source. An evaporation circuit communicating with the side heat exchanger 53 and the suction port of the compressor 31, 73 'is a condensing circuit communicating with the heat source side heat exchanger 53 and the discharge port of the compressor 31, 74 is a first expansion valve, and 75 is a heat source. A second expansion valve that controls the capacity 53 of the side heat exchanger, and a third expansion valve 76 that controls the capacity of the first cooling auxiliary heat exchanger 55.

Reference numeral 77 is a first solenoid valve for cooling which is closed when the heating-use side cycle 68 is in a cooling operation, and 78 is a second solenoid valve for cooling which is normally closed.

The operation of the multi-room cooling / heating apparatus configured as described above will be described for the case of simultaneous heating / cooling operation and the case where there is only a cooling load.

First, consider a case where the heating load is large at the start of operation and then the cooling load increases, and the function of the heat source side heat exchanger 53 is changed from the evaporator to the condenser.

At the start of operation, the condensing solenoid valve 71 and the second cooling solenoid valve 78 are closed, the evaporation solenoid valve 72 and the first cooling solenoid valve 77 are opened, and the first expansion valve 74 is fully opened. .

In the heat source side refrigerant cycle 57 '', the high temperature and high pressure gas discharged from the compressor 31 is supplied to the first auxiliary heat exchanger 5 for heating.
At 1, the heat is radiated to condense and liquefy, and passes through the first expansion valve 74, but since the first expansion valve 74 is fully opened, the refrigerant state does not change here.

The refrigerant having passed through the first expansion valve 74 is decompressed by the second expansion valve 75 and the third expansion valve 76, and at the same time, distributed to the heat source side heat exchanger 53 and the cooling first auxiliary heat exchanger. .

The distributed refrigerant absorbs heat in the heat source side heat exchanger 53 and the cooling auxiliary heat exchanger, respectively, and is vaporized and gasified.

The refrigerant sent to the heat source side heat exchanger 53 is sent to the solenoid valve for evaporation through the bypass pipe 72, and the first cooling
It merges with the refrigerant that has passed through the auxiliary heat exchanger 55 and circulates in the compressor 31.

Since the heating refrigerant cycle 68 and the cooling refrigerant cycle 70 are the same as those in the first embodiment, their explanations are omitted.

When the heat source side heat exchanger 53, which has been used as an evaporator until then, is used as a condenser in order to secure the cooling capacity due to load fluctuation, the condenser solenoid valve 71 is used.
Open, the evaporation solenoid valve 72 is closed, and the third expansion valve 76 is opened.
Is fully opened, the pressure is reduced by the first expansion valve 74 and the second expansion valve 75, and at the same time, the refrigerant is distributed to the heating first auxiliary heat exchanger 51 and the heat source side heat exchanger 53.

The other operations are the same as those before the load change, and the description thereof will be omitted. Next, the operation when only the cooling load is described.

The condensing solenoid valve 71 and the cooling second solenoid valve are opened, the evaporation solenoid valve 72 and the cooling first solenoid valve 77 are closed, and the second expansion valve 75 is fully opened.

In the heat source side refrigerant cycle 57 ″, the high temperature high pressure gas discharged from the compressor 31 passes through the condensing electromagnetic valve 71 to radiate heat in the heat source side heat exchanger 53 to be condensed and liquefied, and the second expansion valve 75 is set. Although it passes, the state does not change here because the second expansion valve 75 is fully opened.

The refrigerant having passed through the second expansion valve 75 is decompressed by the first expansion valve 76 and the third expansion valve 76, and at the same time, the heating first auxiliary heat exchanger 55 and the cooling first auxiliary heat exchanger 55. Will be distributed to.

The distributed refrigerant absorbs heat in the first heating auxiliary heat exchanger 51 and the cooling auxiliary heat exchanger 55, respectively, and is vaporized into gas.

The refrigerant sent to the first auxiliary heating heat exchanger 51 for heating passes through the second electromagnetic valve 78 for cooling air, merges with the refrigerant sent to the first auxiliary heat exchanger 55 for cooling, and then becomes a compressor. Circulate to 31.

On the other hand, the cooling medium cycle 70 for cooling is the same as that of the first embodiment, and therefore its explanation is omitted.

In the heating refrigerant cycle 68, the refrigerant discharged from the heating refrigerant transfer device 59 is the heating capacity control valve 6.
Flow rate is adjusted by 3a and 63b, and the heating side heat exchanger 6 for heating is used.
2a and 62b absorb heat from the indoor air to increase the dryness. Then, it is sent to the second heating auxiliary heat exchanger 58 and radiates heat to the first heating auxiliary heat exchanger 58 to reduce the dryness, and then returns to the heating refrigerant transfer device 61. The case where the function of the heat source side heat exchanger 53 is changed from the condenser to the evaporator can be easily estimated, and therefore the description thereof is omitted here.

According to the second embodiment, the condenser solenoid valve 71 is opened and the evaporation solenoid valve 72 is closed to change the function of the heat source side heat exchanger 53 to the condenser and the evaporator. As a result, the heating use-side cycle 68 can be cooled, and the cooling use-side cycle 70 can be cooled and heated according to the heat load of the indoor units 66a and 66b without the heating-use cycle 70 being heated. And the comfort can be improved.

Further, in the case of only the cooling load, the condensing solenoid valve 71 and the second cooling solenoid valve 78 are opened, and the evaporation solenoid valve 72 and the first cooling solenoid valve 77 are closed. The heating refrigerant cycle 68 can be cooled, the area of the heat exchanger on the use side for cooling can be increased, the air conditioning equipment can be effectively used, and the operation efficiency can be improved to cope with the peak load in the summer.

Next, the third embodiment will be described. FIG. 3 is a refrigerant cycle diagram of a multi-room cooling / heating apparatus according to the third embodiment of the present invention. In FIG. 3, the same components as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted. Also, regarding the operation, the simultaneous cooling / heating operation and the operation with only the cooling load are the same as those in the second embodiment, and therefore the description thereof will be omitted, and the operation with only the heating load will be described.

The solenoid valve 71 for condensing and the solenoid valve 79 for heating are closed, the solenoid valve 72 for evaporation, the first solenoid valve 77 for cooling, the second solenoid valve 78 for cooling are opened, and the second expansion valve 75 is fully opened. And

In the heat source side refrigerant cycle 57 '', the high-temperature high-pressure gas discharged from the compressor 31 passes through the first cooling electromagnetic valve 77 to the heating first auxiliary heat exchanger 51 and the cooling second electromagnetic valve 78. After being sent, it is distributed to the auxiliary heat exchanger 55 for cooling.

The distributed refrigerant radiates heat in the first heating auxiliary heat exchanger 51 and the cooling auxiliary heat exchanger 55, is condensed and liquefied, and is sent to the first expansion valve 74 and the third expansion valve 76 to be decompressed. .

The depressurized refrigerant merges when passing through the second expansion valve 75, but the state of the refrigerant does not change here because the second expansion valve 75 is fully opened.

The heat source side heat exchanger 53 absorbs heat to evaporate it into gas, which is sent to the evaporation solenoid valve 72 through the bypass pipe 73 and then circulated to the compressor to form the heat source side refrigerant cycle 57 '.

At this time, in the heating-use side refrigerant cycle 68, the refrigerant discharged from the heating-use refrigerant transport device 59 is the second heating-use refrigerant.
The auxiliary heat exchanger 58 absorbs heat from the first heating auxiliary heat exchanger 51 to increase the dryness. After that, it is sent to the heating use side heat exchangers 62a and 62b to radiate heat to the indoor air to reduce the dryness, and the flow rate is adjusted by the heating capacity control valves 63a and 63b, and then the heating refrigerant transfer device 59 is returned.

On the other hand, in the cooling-use side refrigerant cycle 70, the refrigerant discharged from the cooling-use refrigerant carrying device 61 is the second cooling-use refrigerant.
The auxiliary heat exchanger 60 absorbs heat from the first cooling auxiliary heat exchanger 55 to increase the dryness. After that, it is sent to the cooling side heat exchangers 64a and 64b to radiate heat to the room air to reduce the dryness, and the flow rate is adjusted by the cooling capacity control valves 65a and 65b to return to the cooling medium transfer device 61.

According to the third embodiment, the condenser solenoid valve 71 is opened and the evaporation solenoid valve 72 is closed to change the function of the heat source side heat exchanger 53 to the condenser and the evaporator. As a result, the heating use-side cycle 68 can be cooled, and the cooling use-side cycle 70 can be cooled and heated according to the heat load of the indoor units 66a and 66b without the heating-use cycle 70 being heated. And the comfort can be improved.

When only the cooling load is applied, the condensing solenoid valve 71 and the second cooling solenoid valve 78 are opened, and the evaporation solenoid valve 72 and the first cooling solenoid valve 77 are closed.
The heating refrigerant cycle 68 can be cooled, the area of the heat exchanger on the use side for cooling can be increased, the air conditioning equipment can be effectively used, and the operation efficiency can be improved to cope with the peak load in the summer.

Further, in the case of only the heating load, the condensing solenoid valve 71 and the heating solenoid valve 79 are closed, and the evaporation solenoid valve 72, the cooling first solenoid valve 77, and the cooling second solenoid valve. By opening 78 and fully opening the second expansion valve 75, the cooling refrigerant cycle 70 can be operated for heating, the area of the heat exchanger on the use side can be increased, and the air conditioning equipment can be effectively used.

[0079]

As described above, the heat exchange amount of the compressor, the first auxiliary heat exchanger for heating, and the first auxiliary heat exchanger for heating, which are installed in parallel with the first auxiliary heat exchanger for heating. Control valve for controlling the heat source side heat exchanger, a first pressure reducing device installed at the inlet of the heat source side heat exchanger to use the heat source side heat exchanger as an evaporator, the heat source side heat exchanger For use as a condenser, a second pressure reducing device installed at the outlet of the heat source side heat exchanger, a heat source side refrigerant cycle formed by annularly connecting a first cooling auxiliary heat exchanger, and the heating first side heat exchanger. 1 Second heating for integrally exchanging heat with auxiliary heat exchanger
A heating use-side refrigerant cycle composed of an auxiliary heat exchanger, a heating refrigerant transfer device, and a plurality of heating use-side heat exchangers, and cooling for integrally forming heat with the cooling first auxiliary heat exchanger Since the second auxiliary heat exchanger, the cooling refrigerant transfer device, and the cooling-use side refrigerant cycle composed of a plurality of cooling-use side heat exchangers are used, even if there is a load change during the simultaneous cooling and heating operation, it can be used. Energy saving and comfort can be improved by coping without switching the cooling and heating operations of the side cycle.

Further, the compressor, the first auxiliary heat exchanger for heating,
A first electromagnetic valve for cooling, which is installed between the compressor and the first auxiliary heat exchanger for heating and is closed when the first auxiliary heat exchanger for heating is used as an evaporator, the first auxiliary for heating A first expansion valve for controlling the capacity of the heat exchanger, a first auxiliary heat exchanger for cooling, a first auxiliary heat exchanger for cooling installed between the first expansion valve and the first auxiliary heat exchanger for cooling Expansion valve for controlling the capacity of the heat source, heat source side heat exchanger, the heat source side heat exchanger provided between the first expansion valve and the second expansion valve in the middle of the pipe communicating the heat source side heat exchanger A second expansion valve that controls the capacity of the exchanger, an evaporation circuit that communicates between the first auxiliary heat exchanger for cooling and the compressor and the heat source side heat exchanger, and the heat source provided in the middle of the evaporation circuit An electromagnetic valve for evaporation that opens when the side heat exchanger is used as an evaporator, the first electromagnetic valve for cooling, and A condenser circuit for communicating between the compressor and the heat source side heat exchanger, a condensing solenoid valve provided in the middle of the condenser circuit and closed when the heat source side heat exchanger is used as a condenser, the first The first auxiliary heat exchanger for heating is provided in the middle of a pipe connecting between the electromagnetic valve for cooling and the first auxiliary heat exchanger for heating and the first auxiliary heat exchanger for cooling and the evaporation circuit pipe. Source side cycle consisting of a second solenoid valve for cooling, which opens when the air conditioner is used as a condenser, and a second auxiliary heat exchanger for heating formed integrally with the first auxiliary heat exchanger for heating. A heating-use refrigerant carrier, a heating-use refrigerant cycle comprising a plurality of heating-use heat exchangers, and a cooling second auxiliary heat which is integrally formed with the cooling first auxiliary heat exchanger to exchange heat. Exchanger, cooling medium carrier for cooling,
Since it is composed of a cooling-use refrigerant cycle consisting of multiple cooling-use heat exchangers, even if there is a load change during simultaneous heating and cooling operation, switching between cooling and heating operation in the usage cycle is not performed. By responding to this, energy saving and comfort are improved, and when only the cooling load is used, the cooling side cycle for heating and the cooling cycle for heating side are simultaneously operated to cool the heat exchange side for cooling. It is possible to increase the equipment area and effectively use the air conditioning equipment to improve the cooling capacity and the operation efficiency, so that it is possible to cope with the peak load in the summer.

Further, there is provided a heating solenoid valve installed between the evaporation circuit tube and the first heating auxiliary heat exchanger and closed when the first heating auxiliary heat exchanger is used as an evaporator. Therefore, even if there is a load change during simultaneous cooling and heating operation, energy saving and comfort are improved by responding without switching between cooling and heating operation on the use side cycle, and in the case of only cooling load By simultaneously cooling the cooling-use side refrigerant cycle and the heating-use side refrigerant cycle, the area of the cooling-use side heat exchanger can be increased, and the cooling capacity and operating efficiency can be improved by effectively using the air conditioning equipment. In case of peak load in summer and only heating load,
By simultaneously performing the heating operation of the cooling-use side refrigerant cycle and the heating-use side refrigerant cycle, the equipment can be effectively used.

[Brief description of drawings]

FIG. 1 is a refrigerant cycle diagram of a multi-room cooling and heating apparatus according to a first embodiment of the present invention.

FIG. 2 is a refrigerant cycle diagram of a multi-room cooling and heating apparatus according to a second embodiment of the present invention.

FIG. 3 is a refrigerant cycle diagram of a multi-room cooling and heating device according to a third embodiment of the present invention.

FIG. 4 is a refrigerant cycle diagram of a conventional multi-room cooling and heating device.

[Explanation of symbols]

 31 Compressor 51 First Auxiliary Heat Exchanger for Heating 52 First Pressure Reduction Device 53 Heat Source Side Heat Exchanger 54 Second Pressure Reduction Device 55 First Auxiliary Heat Exchanger for Cooling 56 Capacity Control Valve 57 ', 57 ", 57' '' Heat source side refrigerant cycle 58 Heating second auxiliary heat exchanger 59 Heating refrigerant transfer device 60 Cooling second auxiliary heat exchanger 61 Cooling refrigerant transfer device 62a, 62b Heating use side heat exchanger 64a, 64b Cooling -Use side heat exchanger 68 Heating-use side refrigerant cycle 70 Cooling-use side refrigerant cycle 71 Condensing solenoid valve 72 Evaporating solenoid valve 73 Evaporating circuit 73 'Condensing circuit 74 First expansion valve 75 Second expansion valve 76 Third Expansion valve 77 Cooling first solenoid valve 78 Cooling second solenoid valve 79 Heating solenoid valve

Claims (3)

[Claims] 1. A compressor, a heating first auxiliary heat exchanger, and a capacity control valve installed in parallel with the heating first auxiliary heat exchanger to control the heat exchange amount of the heating first auxiliary heat exchanger. A heat source side heat exchanger, a first pressure reducing device installed at an inlet of the heat source side heat exchanger for using the heat source side heat exchanger as an evaporator, and the heat source side heat exchanger as a condenser A second pressure reducing device installed at the outlet of the heat source side heat exchanger, a heat source side refrigerant cycle in which a cooling first auxiliary heat exchanger is connected in an annular shape, and the heating first auxiliary heat exchanger, A second auxiliary heat exchanger for heating that is integrally formed and exchanges heat, a heating medium transfer device for heating, and a heating-use side refrigerant cycle comprising a plurality of heating-use side heat exchangers, and the first cooling-use auxiliary heat exchange. Second auxiliary heat exchanger for cooling, which is formed integrally with the air conditioner to exchange heat, and a cooling medium conveying device for cooling And a multi-chamber cooling and heating device comprising a cooling-use side refrigerant cycle comprising a plurality of cooling-use side heat exchangers. 2. A compressor, a first auxiliary heat exchanger for heating, which is installed between the compressor and the first auxiliary heat exchanger for heating and uses the first auxiliary heat exchanger for heating as an evaporator. A first electromagnetic valve for cooling which is closed at this time, a first expansion valve for controlling the capacity of the first auxiliary heat exchanger for heating, a first auxiliary heat exchanger for cooling, the first expansion valve and the first cooling air A third expansion valve installed between auxiliary heat exchangers for controlling the capacity of the first auxiliary heat exchanger for cooling, a heat source side heat exchanger, the heat source between the first expansion valve and the second expansion valve A second expansion valve provided in the middle of a pipe communicating with the side heat exchanger to control the capacity of the heat source side heat exchanger, between the first cooling auxiliary heat exchanger and the compressor, and the heat source side heat exchange Circuit that communicates with the evaporator, when the heat source side heat exchanger provided in the middle of the evaporation circuit is used as an evaporator An evaporation solenoid valve that is opened, a condenser circuit that connects the heat source side heat exchanger between the cooling first solenoid valve and the compressor, and a heat source side heat exchanger that is provided in the middle of the condensation circuit And a solenoid valve for condensing which is closed when used as a connection between the first solenoid valve for cooling and the first heat exchanger for heating and the first heat exchanger for cooling and the evaporation circuit tube. A heat source side cycle including a second solenoid valve for cooling, which is provided when the first auxiliary heat exchanger for heating is used as a condenser, and is integrated in the first auxiliary heat exchanger for heating. A second auxiliary heat exchanger for heating, which is formed into a heat exchanger for heating, a refrigerant transfer device for heating, and a heating-use-side refrigerant cycle comprising a plurality of heating-use-side heat exchangers;
A second cooling-use auxiliary heat exchanger that is formed integrally with the first cooling-use heat exchanger to exchange heat, a cooling-use refrigerant transport device, and a cooling-use-side refrigerant cycle including a plurality of cooling-use-side heat exchangers. And a multi-room cooling and heating system. 3. A heating solenoid valve installed between the evaporation circuit tube and the first heating auxiliary heat exchanger and closed when the first heating auxiliary heat exchanger is used as an evaporator. The multi-room air conditioner according to claim 2.