JPH06147675A - Multi-chamber type air conditioner - Google Patents

Abstract

PURPOSE:To provide a comfortable multi-chamber type cooling or heating device preventing a lack of capacity of an indoor device in a system in which each of indoor devices can perform a cooling or a heating operation in an independent manner by a method wherein the refrigerant is prevented from being accumulated in a heat exchanger at a heat source even in the case where a cooling load and a heating load become substantially equal to each other and a pressure reducing device is closed. CONSTITUTION:This multi-chamber type air conditioner comprises a pressure reducing device opening degree sensing means 38 for sensing a degree of opening of a pressure reducing device 23, a three-way valve operating means 39 in which a three-way valve 25 is communicated with an evaporating circuit 26 and a condensing circuit 26' is closed, a surrounding air temperature sensor 40, a suction pressure sensor 41, a pressure comparing means 42 for comparing pressures to each other, and a pressure reducing device fine opening means 43 for adjusting the pressure reducing device 23 to a degree of opening of a specified value.

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. In FIG. 3, 1 is a compressor, and 19 is a first auxiliary heat exchanger for heating. 20 is the first control valve,
It uses an electric expansion valve. 21 is a second control valve,
It uses an electric expansion valve. 22 is a first auxiliary heat exchanger for cooling. A decompression device 23 uses an electric expansion valve. 24 is a heat source side heat exchanger. 25 is a three-way valve. 26 is an evaporation circuit and 26 'is a condensation circuit, which are switched by a three-way valve 25. Compressor 1, heating first auxiliary heat exchanger 19, first control valve 20, second control valve 21, cooling first auxiliary heat exchanger 22, decompression device 23,
The heat source side heat exchanger 24, the three-way valve 25, the evaporation circuit 26, and the condensing circuit 26 ′ are connected to form a heat source side refrigerant cycle 27.

Reference numeral 28 denotes a second heating auxiliary heat exchanger, which uses a laminated heat exchanger integrally formed with the first heating auxiliary heat exchanger 19 so as to exchange heat. Reference numeral 29 denotes a heating refrigerant transfer device, which uses a refrigerant pump. Reference numeral 30 denotes a cooling second auxiliary heat exchanger, which uses a laminated heat exchanger integrally formed so as to exchange heat with the cooling first auxiliary heat exchanger 22. Reference numeral 31 is a cooling medium transfer device,
You are using a refrigerant pump.

The heat source side refrigerant cycle 27, the heating second auxiliary heat exchanger 28, the heating refrigerant transfer device 29, the cooling second auxiliary heat exchanger 30, and the cooling refrigerant transfer device 31 are housed in the heat source unit 32. There is.

Numerals 33a and 33b are heating side heat exchangers. 34a and 34b are heating capacity control valves, which use electric expansion valves, and are used for heating side heat exchangers 33a,
33b are respectively connected in series.

The second auxiliary heat exchanger 28 for heating, the refrigerant transfer device 29 for heating, the heat exchangers 33a and 33b for heating,
The heating capacity control valves 34a and 34b are connected in a ring shape to form a heating use side refrigerant cycle.

Reference numerals 35a and 35b are cooling side use side heat exchangers. Reference numerals 36a and 36b are cooling capacity control valves, which use electric expansion valves, and are used for cooling side heat exchangers 35a, 35a.
35b are respectively connected in series.

The second auxiliary heat exchanger for cooling 30, the cooling medium transfer device 31, the cooling capacity control valves 36a and 36b, and the cooling side heat exchangers 35a and 35b are annularly connected to each other to cool the cooling side refrigerant. Forming a cycle.

Reference numerals 37a and 37b denote indoor units, which are heating side heat exchangers 33a and 33b, heating capacity control valves 34a and 34b, and cooling side heat exchangers 35a and 35, respectively.
b, and cooling capacity control valves 36a and 36b, respectively.

The operation of the multi-room cooling and heating apparatus configured as described above will be described. Indoor units 37a, 37
When both b are in the cooling operation, in the heat source side refrigerant cycle,
The first control valve 20 is closed, and the three-way valve 25 is switched to connect the condensing circuit 26 '.

The high-temperature high-pressure gas refrigerant from the compressor 1 passes through the condensing circuit 26 'and the three-way valve 25 to radiate heat in the heat source side heat exchanger 24 to be condensed and liquefied, and is decompressed by the decompression device 23 to be the second control valve 21. The heat is absorbed by the first auxiliary heat exchanger 22 for cooling, evaporated into gas, and circulated to the compressor 1.

At this time, the second cooling auxiliary heat exchanger 30 and the first cooling auxiliary heat exchanger 22 exchange heat, and the gas refrigerant in the cooling user side refrigerant cycle is cooled and liquefied, and the cooling refrigerant is cooled. It is sent to the transport device 31. This cooling medium carrier 3
The liquid refrigerant discharged from No. 1 is used as a cooling capacity control valve 36a, 3
6b, the flow rate is controlled appropriately, and it is sent to the cooling use side heat exchangers 35a and 35b to absorb heat, evaporate into gas, and circulate in the cooling second auxiliary heat exchanger 30.

At this time, for example, when heating the indoor unit 37a, the cooling capacity control valve 36a is closed and the first control valve 20 is opened to operate the heating use side refrigerant cycle. That is, the refrigerant of the heating-use side refrigerant cycle sent from the heating refrigerant transfer device 29 is sent to the second heating auxiliary heat exchanger 28 and is heated and gasified by the first heating auxiliary heat exchanger 19. It is sent to the heating use side heat exchanger 33a and heated and condensed and liquefied while the flow rate is controlled by the heating capacity control valve 34a, and circulates to the heating refrigerant transfer device 29.

At this time, the opening amounts of the first control valve 20 and the pressure reducing device 23 are adjusted to control the amount of condensation of the first heating auxiliary heat exchanger 19 and the heat source side heat exchanger 24, and the second control valve 21 is opened. The heat balance of the heat source side refrigerant cycle 27 is maintained by controlling the evaporation amount of the first cooling auxiliary heat exchanger 22 by adjusting the degree.

If the heating load becomes larger than the cooling load, the three-way valve 25 is switched to communicate with the evaporation circuit 26, the heat source side heat exchanger 24 functions as an evaporator, and the opening degree of the decompression device 23 is adjusted. By controlling the evaporation amount of the heat source side heat exchanger 24, the heat balance of the heat source side refrigerant cycle 27 is maintained in balance.

On the other hand, when both the indoor units 37a and 37b are in the heating operation, in the heat source side refrigerant cycle, the second control valve 21 is closed and the three-way valve 25 connects the evaporation circuit 26.

The high-temperature high-pressure gas refrigerant from the compressor 1 is sent to the first heating auxiliary heat exchanger 19 and radiates heat to condense and liquefy,
It is decompressed by the decompression device 23 through the first control valve 20, absorbs heat by the heat source side heat exchanger 24 to be vaporized, and circulates to the compressor 1 through the three-way valve 25 and the evaporation circuit 26.

At this time, the second heating auxiliary heat exchanger 28 and the first heating auxiliary heat exchanger 19 exchange heat, and the liquid refrigerant in the heating-use side refrigerant cycle is heated and gasified to be used for heating. It is sent to the side heat exchangers 33a and 33b, heated and condensed and liquefied while the flow rate is appropriately controlled by the heating capacity control valves 34a and 34b, and sent to the heating refrigerant transfer device 29, and the second auxiliary heat exchange for heating. It circulates to the container 28.

At this time, for example, when the indoor unit 37a is operated for cooling, the heating capacity control valve 34a is closed and the second
The control valve 21 is opened to operate the cooling side refrigerant cycle. That is, the refrigerant that radiates heat to the first cooling auxiliary heat exchanger 22 in the cooling second auxiliary heat exchanger 30 and is liquefied is sent from the cooling refrigerant transfer device 31 to the cooling capacity control valve 36a to appropriately control the flow rate. The cooling side heat exchanger 35a
2nd auxiliary heat exchanger 30 for cooling
Circulate to.

At this time, the evaporation amounts of the first cooling auxiliary heat exchanger 22 and the heat source side heat exchanger 24 are controlled by adjusting the opening degrees of the second control valve 21 and the pressure reducing device 23, and the first control valve 20 is opened. The heat balance of the heat source side refrigerant cycle 27 is maintained by controlling the condensation amount of the first heating auxiliary heat exchanger 19 by adjusting the degree.

If the cooling load becomes larger than the heating load, the three-way valve 25 is switched to connect the condensing circuit 27, the heat source side heat exchanger 24 becomes a condenser, and the opening degree of the decompression device 23 is adjusted. The balance of the heat balance of the heat source side refrigerant cycle 27 is maintained by controlling the condensation amount of the heat source side heat exchanger 24 with.

[0023]

However, in the above structure, for example, the indoor unit 37a, 37b is changed from the state in which both the indoor units 37a, 37b are in the cooling operation to the indoor unit 37.
When the heating load of the indoor unit 37a becomes almost equal to the cooling load of the indoor unit 37b when only a is operated for heating, the decompressor 23 performs a closing operation to close the heat source side refrigerant cycle 27, and then closes. It becomes a state. At this time, the high-temperature refrigerant gas discharged from the compressor 1 is condensed in the heat source side heat exchanger 24 and gradually accumulates as a liquid refrigerant, and the amount of refrigerant circulating in the heat source side refrigerant cycle 27 becomes insufficient, so that the heating operation is performed. Indoor unit 27a,
There is a problem that the capacity of both the indoor units 27b that is in the cooling operation becomes insufficient.

The present invention is intended to solve the above-mentioned problems, and even if the load of cooling and heating becomes almost the same and the decompression device is closed from the state where the heat source side heat exchanger is used as a condenser, the heat source side heat exchange is performed. A first object of the present invention is to provide a comfortable multi-room cooling and heating device by preventing refrigerant from accumulating in the container to prevent insufficient capacity of the indoor unit.

The second purpose is to prevent a shortage of the capacity of the indoor unit by preventing the refrigerant from accumulating in the heat exchanger on the heat source side irrespective of the temperature of the outside air even when the temperature of the outside air becomes lower, which is comfortable. It is to provide a multi-room air conditioner.

[0026]

In order to achieve this object, the multi-room cooling and heating system of the present invention controls the capacities of the compressor, the first auxiliary heat exchanger for heating, and the first auxiliary heat exchanger for heating. A first control valve, a first auxiliary heat exchanger for cooling, the first cooling air
A second control valve for controlling the capacity of the auxiliary heat exchanger, a pressure reducing device, a heat source side heat exchanger, and a three-way valve are connected to each other, and the pressure reducing device is connected between the first control valve and the second control valve. ,
An evaporation circuit in which one of the three-way valves is in communication between the cooling first auxiliary heat exchanger and the compressor, and the other of the three-way valve is between the compressor and the heating first auxiliary heat exchanger. A heat source side refrigerant cycle formed by connecting a communicating condensing circuit, a second heating auxiliary heat exchanger integrally formed with the first heating auxiliary heat exchanger to exchange heat, and a plurality of heating utilization heats A heating-use side refrigerant cycle in which an exchanger and a heating refrigerant transfer device are connected in an annular shape, and a cooling second auxiliary heat exchanger that is integrally formed with the cooling first auxiliary heat exchanger to exchange heat, Refrigerant carrier for cooling, Cooling side refrigerant cycle in which a plurality of cooling side heat exchangers are annularly connected, decompressor opening detection means for detecting the degree of opening of the decompressor, and decompressor opening. If the opening degree of the decompression device detected by the degree detection means falls below a certain value, The three-way valve has a structure having a three-way valve operation means for operating so as to block the condensing circuit communicating the vaporization circuit.

The compressor, the first auxiliary heat exchanger for heating,
A first control valve for controlling the capacity of the first heating auxiliary heat exchanger, a first cooling auxiliary heat exchanger, a second control valve for controlling the cooling first auxiliary heat exchanger, and a pressure reducing device, A heat source side heat exchanger is connected to a three-way valve, the pressure reducing device is connected between the first control valve and the second control valve, and one of the three-way valves is connected to the cooling first auxiliary heat exchanger. An evaporation circuit communicating between the compressors, and a heat source side refrigerant cycle formed by connecting the other of the three-way valves to a condensing circuit communicating between the compressor and the heating first auxiliary heat exchanger, A second auxiliary heat exchanger for heating, which is integrally formed with the first auxiliary heat exchanger for heating to exchange heat, a plurality of heating-side heat exchangers for heating, and a heating system in which a refrigerant transfer device for heating is annularly connected. For cooling the user-use side refrigerant cycle and the first auxiliary heat exchanger for cooling formed integrally with each other A second auxiliary heat exchanger, a cooling medium transfer device, and a cooling-use side refrigerant cycle in which a plurality of cooling-use side heat exchangers are connected in an annular shape, and a decompression device opening degree for detecting the opening degree of the decompression device Detection means and three-way valve operating means for operating the three-way valve so that the three-way valve communicates with the evaporation circuit and shuts off the condensation circuit when the opening of the decompression device detected by the decompression device opening detection device becomes a certain value or less. An outside air temperature sensor for detecting the outside air temperature, an intake pressure sensor for detecting the intake pressure of the compressor, and a saturation pressure of the refrigerant calculated from the outside air temperature detected by the outside air temperature sensor and the suction pressure sensor for detecting As a result of comparison between the pressure comparison means for comparing with the suction pressure of the compressor and the pressure comparison means, when the saturation pressure of the refrigerant is smaller, the decompression device adjusts the decompression device to a constant opening degree.置微 has a configuration including a opening means.

[0028]

According to the present invention, when the heat source side heat exchanger is used as a condenser, the cooling / heating load becomes almost equal and the decompression device is closed when the decompression device is closed. In this case, by switching the three-way valve and connecting the evaporation circuits, the refrigerant that tends to accumulate in the heat source side heat exchanger can be sucked by the suction force of the compressor.

This makes it possible to prevent a shortage of the amount of the refrigerant circulating in the heat source side cycle. Also, when the outside air temperature is low and the refrigerant is more likely to accumulate in the heat source side heat exchanger, the pressure reducing device is opened slightly to a certain value and the refrigerant accumulated in the heat source side heat exchanger is pushed out, thereby exchanging the heat source side heat exchanger of the refrigerant. It is possible to prevent accumulation in the vessel.

As a result, it is possible to prevent a shortage of the amount of refrigerant circulating in the heat source side cycle without being affected by the outside air temperature.

[0031]

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. It should be noted that the same components as those of the related art are designated by the same reference numerals and detailed description thereof will be omitted.

In FIG. 1, 38 is a pressure reducing device opening detecting means for detecting the opening of the pressure reducing device 23, and 39 is three-way when the pressure reducing device opening detected by the pressure reducing device opening detecting means 38 is below a certain value. It is a three-way valve operating means that operates the valve 25 to communicate with the evaporation circuit 26 and shuts off the condensation circuit 26 ′.

With respect to the multi-room cooling and heating apparatus configured as described above, the description of the same operation as the conventional example is omitted, and in the case where the heating and cooling operations have a substantially equal load from the cooling operation which is now a problem. The operation will be described.

From the state where both the indoor units 37a and 37b are in the cooling operation, for example, the indoor unit 37a
When the heating operation is performed on the first control valve 20 and the pressure reducing device 23,
Of the first auxiliary heat exchanger for heating 19 and the heat source side heat exchanger 24 by controlling the opening degree of the second control valve 21, and the evaporation amount of the first auxiliary heat exchanger for cooling 22 by adjusting the opening degree of the second control valve 21. The heat balance of the heat source side refrigerant cycle 27 is maintained by controlling the heat source side refrigerant cycle. However, when the cooling and heating loads are almost equal, the decompression device 23 is closed to keep the heat balance. At this time, when the decompression device opening detection means 38 detects that the decompression device 23 is below a certain opening, the three-way valve operating means 39 operates the three-way valve 25 to communicate the evaporation circuit 26 and the condensing circuit 26. 'Cut off.

As described above, according to the first embodiment, the refrigerant that tends to accumulate in the heat source side heat exchanger 24 by switching the three-way valve 25 and connecting the evaporation circuit 26 to the compressor 1
It can be prevented by sucking out by the suction force.

As a result, the shortage of the amount of the refrigerant circulating in the heat source side cycle 27 can be prevented, and therefore the heat source side heat exchanger 2
Even when the cooling and heating loads are almost equalized and the decompression device is closed from the state in which 4 is used as the condenser, the refrigerant is prevented from accumulating in the heat source side heat exchanger 24 so that the indoor units 37a and 37b are protected. It is possible to provide a comfortable multi-room air conditioner that prevents a lack of capacity.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is a refrigerant cycle diagram of the multi-room cooling and heating apparatus in the second embodiment. It should be noted that the same components as those of the related art are designated by the same reference numerals and detailed description thereof will be omitted.

In FIG. 2, 38 is a pressure reducing device opening detecting means for detecting the opening of the pressure reducing device 23, and 39 is three-way when the opening of the pressure reducing device 23 detected by the pressure reducing device opening detecting means 38 is below a certain value. Three-way valve operating means for operating the valve 25 to communicate with the evaporation circuit 26 and shutting off the condensation circuit 26 ′, 4
0 is an outside air temperature sensor that detects the outside air temperature, 41 is a suction pressure sensor that detects the suction pressure of the compressor 1, 42
Is a pressure comparison means for calculating the saturation pressure of the refrigerant from the outside air temperature detected by the outside air temperature sensor 40 and comparing it with the suction pressure of the compressor 1 detected by the suction pressure sensor 41.
Reference numeral 3 denotes a pressure reducing device fine opening means for adjusting the pressure reducing device 23 to a constant opening degree when the saturated pressure of the refrigerant is smaller as a result of comparison by the pressure comparing means 42.

With respect to the multi-room cooling and heating apparatus configured as described above, the explanation of the same operation as the conventional example is omitted, and in the case where the heating and cooling operations become almost the same load from the cooling operation at present, The operation will be described.

From the state where both the indoor units 37a and 37b are in the cooling operation, for example, the indoor unit 37a
When the heating operation is performed on the first control valve 20 and the pressure reducing device 23,
Of the first auxiliary heat exchanger for heating 19 and the heat source side heat exchanger 24 by controlling the opening degree of the second control valve 21, and the evaporation amount of the first auxiliary heat exchanger for cooling 22 by adjusting the opening degree of the second control valve 21. The heat balance of the heat source side refrigerant cycle 27 is maintained by controlling the heat source side refrigerant cycle. However, when the cooling and heating loads are almost equal, the decompression device 23 is closed to keep the heat balance. At this time, when the decompression device opening detection means 38 detects that the decompression device 23 is below a certain opening, the three-way valve operating means 39 operates the three-way valve 25 to communicate the evaporation circuit 26 and the condensing circuit 26. 'Cut off.
Further, at this time, as a result of comparison by the pressure comparing means 42 based on the outside air temperature detected by the outside air temperature sensor 40 and the suction pressure of the compressor 1 detected by the suction pressure sensor 41, the saturation pressure of the refrigerant becomes smaller. In this case, the decompression device fine opening means 43 adjusts the decompression device 23 to a constant opening.

As described above, according to the second embodiment, by switching the three-way valve 25 and connecting the evaporation circuit 26, the refrigerant which tends to accumulate in the heat source side heat exchanger 24 is compressed.
It can be prevented by sucking out by the suction force. Even when the outside air temperature decreases, the refrigerant accumulated in the heat source side heat exchanger 24 can be pushed out by setting the decompression device 23 to a constant opening.

As a result, it is possible to prevent a shortage of the amount of the refrigerant circulating in the heat source side cycle 27 regardless of the outside air temperature. Therefore, from the state where the heat source side heat exchanger 24 is used as a condenser, the cooling and heating load is almost the same. Decompression device 23 becomes equivalent
Even when is closed, it is possible to prevent the refrigerant from accumulating in the heat source side heat exchanger 24, so that the indoor unit 37a,
It is possible to provide a comfortable multi-room cooling and heating device by preventing the insufficient capacity of 37b.

[0043]

As is apparent from the above description, the present invention is
Of the compressor, the first auxiliary heat exchanger for heating, the first auxiliary heat exchanger for heating, the first control valve for cooling, the first auxiliary heat exchanger for cooling, and the first auxiliary heat exchanger for cooling. A second control valve for controlling the capacity, a pressure reducing device, a heat source side heat exchanger, and a three-way valve are connected, and the pressure reducing device is connected between the first control valve and the second control valve, and the three-way valve An evaporation circuit, one of which is connected between the first auxiliary heat exchanger for cooling and the compressor, and the other of the three-way valve is connected to the compressor and the first heating unit.
A heat source side refrigerant cycle formed by connecting a condensing circuit communicating between the auxiliary heat exchangers, and a second heating auxiliary heat exchanger integrally formed with the first heating auxiliary heat exchanger, A heating-use-side refrigerant cycle in which a plurality of heating-use-side heat exchangers and a heating-use refrigerant transfer device are connected in an annular shape, and a cooling system in which heat is exchanged by being integrally formed with the cooling first auxiliary heat exchanger A second auxiliary heat exchanger, a cooling medium transfer device, and a cooling-use side refrigerant cycle in which a plurality of cooling-use side heat exchangers are connected in an annular shape, and a decompression device opening degree for detecting the opening degree of the decompression device Detecting means and three-way valve operating means for operating the three-way valve so as to connect the evaporation circuit to cut off the condensing circuit when the opening degree of the decompression device detected by the decompression device opening detection means becomes a certain value or less. By providing the heat source side cycle Since the shortage of the amount of medium can be prevented, the refrigerant accumulates in the heat source side heat exchanger even when the load of cooling and heating becomes almost equal from the state where the heat source side heat exchanger is used as a condenser and the decompression device closes. By preventing this, it is possible to prevent a lack of capacity of the indoor unit and provide a comfortable multi-room air conditioner.

Further, the present invention provides a compressor, a first auxiliary heat exchanger for heating, a first control valve for controlling the capacity of the first auxiliary heat exchanger for heating, a first auxiliary heat exchanger for cooling, and the cooling. For first
A second control valve for controlling the capacity of the auxiliary heat exchanger, a pressure reducing device, a heat source side heat exchanger, and a three-way valve are connected to each other, and the pressure reducing device is connected between the first control valve and the second control valve. ,
An evaporation circuit in which one of the three-way valves is in communication between the cooling first auxiliary heat exchanger and the compressor, and the other of the three-way valve is between the compressor and the heating first auxiliary heat exchanger. A heat source side refrigerant cycle formed by connecting a communicating condensing circuit, a second heating auxiliary heat exchanger integrally formed with the first heating auxiliary heat exchanger to exchange heat, and a plurality of heating utilization heats A heating-use side refrigerant cycle in which an exchanger and a heating refrigerant transfer device are connected in an annular shape, and a cooling second auxiliary heat exchanger that is integrally formed with the cooling first auxiliary heat exchanger to exchange heat, Refrigerant carrier for cooling, Cooling side refrigerant cycle in which a plurality of cooling side heat exchangers are connected in a ring, decompression device opening detection means for detecting the opening of the decompression device, and the decompression device The opening degree of the decompression device detected by the opening degree detection means becomes a certain value or less A three-way valve operating means for operating the three-way valve so as to connect the evaporation circuit to cut off the condensation circuit; an outside air temperature sensor for detecting an outside air temperature; and an intake pressure sensor for detecting an intake pressure of the compressor, The saturation pressure of the refrigerant is calculated by calculating the saturation pressure of the refrigerant from the outside air temperature detected by the outside air temperature sensor and comparing it with the suction pressure of the compressor detected by the suction pressure sensor. If it is smaller, the decompression device fine opening means for adjusting the decompression device to a constant opening is provided, so that it is possible to prevent a shortage of the amount of refrigerant circulating in the heat source side cycle regardless of the outside air temperature, and condense the heat source side heat exchanger Prevent the refrigerant from accumulating in the heat source side heat exchanger even when the cooling and heating load becomes almost the same and the decompression device closes after being used as a heat exchanger. It is possible to prevent insufficient capacity of the indoor units to provide a comfortable multi-chamber air conditioner because it.

[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 conventional multi-room cooling and heating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 19 1st auxiliary heat exchanger for heating 20 1st control valve 21 2nd control valve 22 1st auxiliary heat exchanger for cooling 23 Decompression device 24 Heat source side heat exchanger 25 3-way valve 26 Evaporation circuit 26 'Condensation circuit 27 Heat Source Side Refrigerant Cycle 28 Heating Second Auxiliary Heat Exchanger 29 Heating Refrigerant Transfer Device 30 Cooling Second Auxiliary Heat Exchanger 31 Cooling Refrigerant Transfer Device 33a, 33b Heating Utilization Side Heat Exchanger 35a, 35b For Cooling Use side heat exchanger 38 Decompression device opening detection means 39 Three-way valve operation means 40 Outside air temperature sensor 41 Suction pressure sensor 42 Pressure comparison means 43 Decompression device fine opening means

Claims (2)

[Claims] 1. A compressor, a first auxiliary heat exchanger for heating, a first control valve for controlling the capacity of the first auxiliary heat exchanger for heating,
A first auxiliary heat exchanger for cooling, a second control valve for controlling the capacity of the first auxiliary heat exchanger for cooling, a pressure reducing device, a heat source side heat exchanger, and a three-way valve are connected, and the pressure reducing device is the first An evaporation circuit communicating between the control valve and the second control valve, one of the three-way valves communicating between the cooling first auxiliary heat exchanger and the compressor, and the other of the three-way valves A heat source side refrigerant cycle in which a compressor and a condensing circuit communicating between the first heating auxiliary heat exchanger are connected, and the first heating heating
A second auxiliary heat exchanger for heating, which is integrally formed with the auxiliary heat exchanger to exchange heat, a plurality of heating side heat exchangers for heating, and a heating side refrigerant cycle in which a heating refrigerant transfer device is annularly connected. A second auxiliary heat exchanger for cooling, which is formed integrally with the first auxiliary heat exchanger for cooling to exchange heat, a cooling medium carrier for cooling, and a plurality of cooling side heat exchangers connected in an annular shape. A cooling side refrigerant cycle, a decompression device opening detection means for detecting the opening degree of the decompression device, and the three-way valve when the opening degree of the decompression device detected by the decompression device opening detection means falls below a certain value. A multi-chamber cooling / heating apparatus having a three-way valve operating means for operating the above so as to communicate with the evaporation circuit and shut off the condensation circuit. 2. A compressor, a first auxiliary heat exchanger for heating, a first control valve for controlling the capacity of the first auxiliary heat exchanger for heating,
A first auxiliary heat exchanger for cooling, a second control valve for controlling the capacity of the first auxiliary heat exchanger for cooling, a pressure reducing device, a heat source side heat exchanger, and a three-way valve are connected, and the pressure reducing device is the first An evaporation circuit communicating between the control valve and the second control valve, one of the three-way valves communicating between the cooling first auxiliary heat exchanger and the compressor, and the other of the three-way valves A heat source side refrigerant cycle in which a compressor and a condensing circuit communicating between the first heating auxiliary heat exchanger are connected, and the first heating heating
A second auxiliary heat exchanger for heating, which is integrally formed with the auxiliary heat exchanger to exchange heat, a plurality of heating side heat exchangers for heating, and a heating side refrigerant cycle in which a heating refrigerant transfer device is annularly connected. A second auxiliary heat exchanger for cooling, which is formed integrally with the first auxiliary heat exchanger for cooling to exchange heat, a cooling medium carrier for cooling, and a plurality of cooling side heat exchangers connected in an annular shape. The cooling side refrigerant cycle, the decompression device opening detection means for detecting the opening of the decompression device, and the three directions when the opening of the decompression device detected by the decompression opening device detection means becomes a certain value or less. A three-way valve operating means for operating a valve to communicate with the evaporation circuit to shut off the condensation circuit, an outside air temperature sensor for detecting an outside air temperature, an intake pressure sensor for detecting an intake pressure of the compressor, and the outside air Detected by temperature sensor As compared with the pressure comparison means for calculating the saturation pressure of the refrigerant from the outside air temperature and comparing it with the suction pressure of the compressor detected by the suction pressure sensor, as a result of comparison with the pressure comparison means, if the saturation pressure of the refrigerant is smaller, A multi-chamber cooling and heating device provided with a decompression device fine opening means for adjusting the decompression device to a constant opening.