JPH05280818A - Multi-chamber type cooling or heating device - Google Patents

Abstract

PURPOSE:To accommodate for a season including an intermediate season and a winter season mixedly prevailing by a method wherein in summer season the first utilization side refrigerant cycle and the second utilization side refrigerant cycle are applied for a cooling operation and in the intermediate season, the first utilization side refrigerant cycle is used for the cooling operation and the second utilization side refrigerant cycle is used for the heating operation. CONSTITUTION:There are provided a heat source side refrigerant cycle 38 having the first auxiliary heat exchanger 34 and the second auxiliary heat exchanger 36 cooperatively connected to each other; the first utilization side refrigerant cycle 49 having the third auxiliary heat exchanger 39, the first refrigerant transporting device 41, the first flow rate valves 45a, 45b and the first indoor heat exchangers 46a, 46b connected thereto; and the second utilization side refrigerant cycle 50 having the fourth auxiliary heat exchanger 40, the second refrigerant transporting device 42, the second flow rate valves 47a, 47b and the second indoor heat exchangers 48a, 48b connected thereto. Then, in summer season, the first utilization side refrigerant cycle 49 and the second utilization side refrigerant cycle 50 are utilized for cooling operation. In the intermediate season and winter season, the first utilization side refrigerant cycle 49 is utilized for cooling operation and the second utilization side refrigerant cycle 50 is utilized for heating operation.

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 which is divided into a heat source side refrigerant cycle and a use side refrigerant cycle.

[0002]

2. Description of the Related Art Conventionally, a refrigerant cycle of a multi-chamber cooling and heating apparatus separated into a heat source side refrigerant cycle and a use side refrigerant cycle is
As shown in Japanese Patent Application Laid-Open No. 62-272040, FIG.
Was configured like.

A description will be given below with reference to the drawings. In FIG. 5, 11 is a compressor, 12 is a four-way valve, 13 is a heat source side heat exchanger, 14 is a cooling decompression device, 15 is a heating decompression device, and 16 is a heating-time cooling decompression device 14. A stop valve, 17 is a check valve that closes the pressure reducing device 15 for heating during cooling, and 18 is a first auxiliary heat exchanger that connects them in an annular shape.
A heat source side refrigerant cycle is formed. A second auxiliary heat exchanger 19 is integrally formed so as to exchange heat with the first auxiliary heat exchanger 18. Reference numeral 20 denotes a refrigerant amount adjustment tank for adjusting the amount of refrigerant during cooling and during heating.

Reference numeral 21 denotes a refrigerant transfer device having a reversible characteristic that the outflow directions of the refrigerant are opposite during cooling and during heating, and these are housed in the outdoor unit f. 22a, 22b
Is a user-side heat exchanger and is housed in the indoor units g and h, and is connected to the outdoor unit f by connecting pipes i, i ′, j and j ′. The second auxiliary heat exchanger 19 and the refrigerant amount adjustment tank 2
0, refrigerant transfer device 21, use side heat exchangers 22a, 22b
And the connection pipes i, i ′, j, j ′ are connected in a ring shape to form a utilization side refrigerant cycle.

The operation of the multi-room cooling and heating apparatus configured as described above will be described. During the cooling operation, the solid line refrigerant cycle is shown in the figure. In the heat source side refrigerant cycle, the high temperature and high pressure gas from the compressor 11 passes through the four-way valve 12 and radiates heat in the heat source side heat exchanger 13 to be condensed and liquefied. The pressure is reduced by the expansion valve 14 for cooling, evaporated in the first auxiliary heat exchanger 18, passed through the four-way valve 12, and circulated to the compressor 11.

At this time, the second auxiliary heat exchanger 19 of the use side refrigerant cycle and the first auxiliary heat exchanger 18 exchange heat, and the gas refrigerant in the use side refrigerant cycle is cooled and liquefied to adjust the amount of refrigerant. It is sent to the refrigerant carrier device 21 through the tank 20, and is sent to the use side heat exchangers 22a and 22b by the refrigerant carrier device 21 through the connection pipes i and j to undergo endothermic evaporation and gasification to be connected to the connection pipe i ′. , J ′ to be circulated to the second auxiliary heat exchanger 19.

On the other hand, during the heating operation, the refrigerant cycle is shown by the broken line in the figure, and in the heat source side refrigerant cycle, the high-temperature high-pressure refrigerant from the compressor 11 is sent from the four-way valve 12 to the first auxiliary heat exchanger 18 to radiate heat. Then, it is condensed and liquefied, decompressed from the check valve 17 by the heating decompression device 15, absorbed and evaporated by the heat source side heat exchanger 13, and circulated to the compressor 11 through the four-way valve 12. At this time, the second auxiliary heat exchanger 19 of the use side refrigerant cycle
And the first auxiliary heat exchanger 18 exchanges heat with each other, and the liquid refrigerant in the usage-side refrigerant cycle is heated and gasified, and is sent to the usage-side heat exchanger 22 through the connection pipes i ′ and j ′, and is heated. Then, the heat is liquefied and liquefied, and is sent to the refrigerant transfer device 21 through the connection pipes i and j, and circulates from the refrigerant amount adjustment tank 20 to the second auxiliary heat exchanger 19.

[0008]

However, in the above-mentioned configuration, the indoor units g and h cannot freely select cooling and heating, so that it is necessary to perform the cooling in the middle period and the heating is required. In some cases, there was a problem that they could not drive at the same time.

In recent building air-conditioning, there are places where cooling is required even in winter, places where switching between cooling and heating is good, and there are places where it is necessary to selectively operate cooling and heating such as intermediate periods. However, there was a problem that indoor units could not be used depending on the location.

There is also a problem that the place where the outdoor unit is placed is limited. In addition, there is a problem that a large amount of electric power is required for the refrigerant transfer device.

In view of the above-mentioned problems, the multi-room air conditioner of the present invention enables each indoor unit to selectively operate cooling and heating.

Further, in addition to the above-mentioned purpose, it is possible to increase the degree of freedom in the demands for heating and cooling everywhere.

In addition to the above purpose, the outdoor unit can be freely installed. In addition to the above purpose,
The amount of electric power of the refrigerant transfer device is significantly reduced.

[0014]

In order to solve the above-mentioned problems, a multi-chamber cooling and heating apparatus of the present invention comprises a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, and a first auxiliary heat exchange. A heat source side refrigerant cycle formed by connecting a vessel, a second pressure reducing device and a second auxiliary heat exchanger in an annular shape, and a third auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger to exchange heat. A refrigerant transfer device, a first flow valve provided in each cooling / free indoor unit capable of freely performing heating / cooling selective operation, and a first use-side refrigerant cycle in which a first indoor heat exchanger is annularly connected, and the second auxiliary heat A fourth auxiliary heat exchanger, which is integrally formed with the exchanger and exchanges heat, the second
Refrigerant transfer device, second provided in each of the cooling and heating free indoor units
A second utilization-side refrigerant cycle in which a flow valve and a second indoor heat exchanger are connected in a ring shape.

Further, a heat source comprising a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, a first auxiliary heat exchanger, a second pressure reducing device and a second auxiliary heat exchanger connected in an annular shape. The side refrigerant cycle, the third auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger to exchange heat, the first refrigerant transfer device, and the cooling / heating free indoor unit that can freely select the heating / cooling operation are provided. First
A first use-side refrigerant cycle in which a third flow valve and a third indoor heat exchanger, which are provided in a flow valve, a first indoor heat exchanger, and each cooling / heating only indoor unit capable of operating one of heating and cooling, are annularly connected; A fourth auxiliary heat exchanger that is integrally formed with the second auxiliary heat exchanger to exchange heat, a second refrigerant transfer device, a second flow valve and a second indoor heat exchanger provided in each of the cooling / heating free indoor units, and It is provided with a second usage-side refrigerant cycle in which a third flow valve provided in the indoor unit dedicated to cooling and heating and a third indoor heat exchanger are connected in an annular shape.

Further, a heat source comprising a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, a first auxiliary heat exchanger, a second pressure reducing device and a second auxiliary heat exchanger connected in an annular shape. The side refrigerant cycle, the third auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger to exchange heat, the first refrigerant transfer device, and the cooling / heating free indoor unit that can freely select the heating / cooling operation are provided. First
A first use-side refrigerant cycle in which a third flow valve and a third indoor heat exchanger, which are provided in a flow valve, a first indoor heat exchanger, and each cooling / heating only indoor unit capable of operating one of heating and cooling, are annularly connected; A fourth auxiliary heat exchanger that is integrally formed with the second auxiliary heat exchanger to exchange heat, a second refrigerant transfer device, a second flow valve and a second indoor heat exchanger provided in each of the cooling / heating free indoor units, and A third flow rate valve provided in each indoor unit dedicated to cooling and heating and a second utilization side refrigerant cycle in which a third indoor heat exchanger is annularly connected are provided, and the compressor, the heat source side four-way valve, the heat source side heat exchanger, An outdoor unit having a first pressure reducing device and a second pressure reducing device, a first auxiliary heat exchanger unit having the first auxiliary heat exchanger, a third auxiliary heat exchanger, and a first refrigerant transfer device, and a second auxiliary Heat exchanger and fourth
It is provided with a second auxiliary heat exchanger unit having an auxiliary heat exchanger and a second refrigerant transfer device.

Further, a heat source comprising a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, a first auxiliary heat exchanger, a second pressure reducing device and a second auxiliary heat exchanger connected in an annular shape. The side refrigerant cycle, a third auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger and exchanges heat, a first flow valve and a first flow valve provided in each cooling / heating free indoor unit that can freely select heating / heating. 1st indoor heat exchanger and the 1st utilization side refrigerant cycle which connected the 3rd flow valve and the 3rd indoor heat exchanger which were provided in the indoor unit for exclusive use of cooling and heating which can operate either one side, and the said 2nd auxiliary heat A fourth auxiliary heat exchanger that is integrally formed with the exchanger to perform heat exchange, a second refrigerant transfer device, a second flow valve and a second indoor heat exchanger provided in each of the cooling / heating free indoor units, and each of the cooling / heating dedicated chambers. Second utilization side refrigerant support in which a third flow valve provided in the machine and a third indoor heat exchanger are connected in an annular shape An outdoor unit having a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, and a second pressure reducing device, and the first auxiliary heat exchanger and the third auxiliary heat exchanger. A first auxiliary heat exchanger unit having a first refrigerant transfer device, a second heat exchanger unit having a second auxiliary heat exchanger, a fourth auxiliary heat exchanger, and a second refrigerant transfer device; An on-off valve is provided in parallel with the first refrigerant transfer device, and the first auxiliary heat exchanger unit is located at a predetermined height above the uppermost indoor unit.

[0018]

According to the multi-room cooling and heating apparatus of the present invention, both the first use-side refrigerant cycle and the second use-side refrigerant cycle are used for cooling in the summer and the first use-side in the intermediate period and winter by the above-described configuration. Since the refrigerant cycle can be used for cooling and the second usage-side refrigerant cycle can be used for heating, it is possible to cope with the case where cooling and heating are mixed in the middle period or winter.

In addition to the above-mentioned operation, by selectively connecting the indoor unit capable of the cooling / heating selective operation and the indoor unit for the switching operation of the cooling / heating, the winter cooling or the cooling / heating required for the recent building air conditioning can be achieved. It becomes possible to use the indoor units according to various places, such as when either one of the switching operation and the selective operation of the heating and cooling in the intermediate period is required.

In addition to the above operation, since each auxiliary heat exchanger unit is separated, the place where the outdoor unit is placed can be freely selected.

In addition to the above operation, since the first auxiliary heat exchanger unit is located further above the uppermost indoor unit, it is possible to perform the cooling operation of the first use-side refrigerant cycle by the natural circulation operation. Therefore, the electric power amount of the refrigerant transfer device can be significantly reduced.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-room air conditioner according to a first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a refrigerant cycle of a multi-room air conditioner according to an embodiment of the present invention.

In FIG. 1, 30 is a compressor, 31 is a heat source side four-way valve, 32 is a heat source side heat exchanger, 33 is a first pressure reducing device, 34 is a first auxiliary heat exchanger, and 35 is a second pressure reducing device. Three
6 is a second auxiliary heat exchanger, 37a is the first pressure reducing device 33
And a first electromagnetic valve provided in parallel with the series circuit of the first auxiliary heat exchanger 34, 37b is a second electromagnetic valve provided in parallel with the second auxiliary heat exchanger 36, and 37c is the heat source side heat exchanger 32. And a third electromagnetic valve provided in parallel with the series circuit of the first pressure reducing device 33, and these are connected to form the heat source side refrigerant cycle 38.

Further, 39 is a third auxiliary heat exchanger which is formed integrally with the first auxiliary heat exchanger 34 and exchanges heat, and 40 is a fourth auxiliary heat which is formed integrally with the second auxiliary heat exchanger 36 and exchanges heat. An exchanger, 41 is a first refrigerant transfer device, 42 is a second refrigerant transfer device, and the heat source side refrigerant cycle 38, the first auxiliary heat exchanger 34, the second auxiliary heat exchanger 36, and the third auxiliary heat exchanger. 39
The fourth auxiliary heat exchanger 40, the first refrigerant transfer device 41, and the second refrigerant transfer device 42 form an outdoor unit 43.

Reference numerals 44a and 44b denote cooling / heating free indoor units capable of freely selecting cooling / heating, and first flow valves 45a and 45, respectively.
b, the first indoor heat exchangers 46a and 46b, the second flow valve 47
a, 47b and second indoor heat exchangers 48a, 48b. The first auxiliary heat exchanger 39, the first refrigerant transfer device 4
1, first flow valves 45a and 45b, first indoor heat exchanger 46
a and 46b are connected to form a first usage-side refrigerant cycle 49. In addition, the fourth auxiliary heat exchanger 40, the second refrigerant transfer device 42, the second flow valves 47a and 47b, and the second indoor heat exchangers 48a and 48b are connected to each other, and the second use-side refrigerant cycle 5 is connected.
Forming 0.

The operation of the multi-room cooling and heating apparatus configured as described above will be described. During the cooling operation in the summer, the heat source side refrigerant cycle 38 becomes the cooling operation, and the refrigerant from the compressor 30 is sent from the heat source side four-way valve 31 to the heat source side heat exchanger 32 for heat dissipation condensation, and the first decompressor 33 causes the first The auxiliary heat exchanger 34 and the second pressure reducing device 35 evaporate in the second auxiliary heat exchanger 36, respectively, and from the heat source side four-way valve 31 to the compressor 3
Cycle to zero. At this time, the third auxiliary heat exchanger 39 and the third
The auxiliary heat exchanger 40 is cooled and cooled.

The refrigerant in the first use-side refrigerant cycle 49 is cooled by the third auxiliary heat exchanger 39, and the liquefied refrigerant is cooled by the first refrigerant carrier device 41 in the cooling / heating indoor units 44a, 44b.
The flow rate is controlled by the first flow rate valves 45a and 45b, and is sent to the first indoor heat exchangers 46a and 46b, evaporatively cooled, gasified, and circulated to the third auxiliary heat exchanger 39.

The refrigerant in the second use-side refrigerant cycle 50 is cooled by the fourth auxiliary heat exchanger 40, and the liquefied refrigerant is cooled and heated by the second refrigerant carrier device 42.
The flow rate is controlled by the first flow rate valves 47a, 47b of b and is sent to the second indoor heat exchangers 48a, 48b, evaporatively cooled, gasified, and circulated to the fourth auxiliary heat exchanger 40.

Therefore, the cooling / heating free indoor units 44a and 44b have a large cooling capacity and can cope with the cooling load in the summer.

Next, when the cooling and the heating are mixed in the middle period and the like, the heat source side refrigerant cycle 38 becomes the heating operation, and the refrigerant from the compressor 30 flows from the heat source side four-way valve 31 to the second auxiliary heat exchanger 36. It is sent and condensed by heat radiation, decompressed by the second decompression device 35, evaporated and radiated by the first auxiliary heat exchanger 34, and the third solenoid valve 37.
It circulates to the compressor 30 through c and the heat source side four-way valve 31. At this time, the third auxiliary heat exchanger 39 is cooled to be cooled, and the fourth auxiliary heat exchanger 40 is heated to be heated.

Therefore, the first use-side refrigerant cycle 49 becomes the cooling cycle, the second use-side refrigerant cycle 50 becomes the heating cycle, and the first and second flow rate valves 45a, 45b and the second flow rate valve 47a, in the cooling / heating free indoor units 44a, 44b. 47b enables selection of the first indoor heat exchangers 46a, 46b or the second indoor heat exchangers 48a, 48b and flow rate control, which makes it possible to freely select cooling and heating and obtain the capacity according to the load. ..

However, the cooling / heating capacity at this time is about 60% of the maximum capacity of the cooling / heating free indoor units 44a, 44b, but it is an intermediate period and the cooling / heating load is small and can be sufficiently dealt with.

The control of the heat storage amount of each heat storage tank is performed by the second
The electromagnetic valve 37b is controlled and performed. For example, when only the cooling heat amount of the third auxiliary heat exchanger 39 is insufficient, the heat source side refrigerant cycle 38 becomes the cooling operation, the first pressure reducing device 33 reduces the pressure, and the first auxiliary heat exchanger 34 evaporates and cools the 2 decompression device 3
In No. 5, the second solenoid valve 37b was opened without reducing the pressure, and the compressor 30
Circulate to. Further, when only the heating heat amount of the fourth auxiliary heat exchanger 40 is insufficient, the heat source side refrigerant cycle 38 is in the heating operation described above, the second auxiliary heat exchanger 36 radiatively heats and the second pressure reducing device 35 reduces the pressure. After passing through the first electromagnetic valve 37a, the heat source side heat exchanger 32 evaporates and circulates to the compressor 30.

Next, when the cooling / heating free indoor units 44a and 44b are required to perform only the heating operation, the first auxiliary heat exchanger 34 is operated without reducing the pressure in the second pressure reducing device 35 in the above-described intermediate operation.
However, it is radiatively condensed, decompressed by the first decompression device 33 and evaporated by the heat source side heat exchanger 32, and the heat source side four-way valve 31 passes through the compressor 30.
Circulate to. Therefore, the third auxiliary heat exchanger 39 is also heated,
The first use-side refrigerant cycle 49 also performs heating operation, and 100% of the heating capacity of the cooling / heating free indoor units 44a and 44b is obtained.

As described above, the multi-room air conditioner of this embodiment has the heat source side refrigerant cycle 38 in which the first auxiliary heat exchanger 34 and the second auxiliary heat exchanger 36 are connected in an annular shape, and the third auxiliary heat exchanger. The auxiliary heat exchanger 39, the first refrigerant transfer device 41, and the first flow valve 4 provided in each of the cooling / heating free indoor units 44a, 44b.
5a, 45b and first indoor heat exchangers 46a, 46b are connected in a ring shape to a first use-side refrigerant cycle 49, and the fourth
The auxiliary heat exchanger 40, the second refrigerant transfer device 42, the second flow valves 47a, 47b and the second indoor heat exchangers 48a, 48b provided in each cooling / heating free indoor unit
Since it has a user side refrigerant cycle 50,
Usage-side refrigerant cycle 49 and second usage-side refrigerant cycle 5
Since both 0 can be used for cooling, and the first use-side refrigerant cycle 49 can be used for cooling and the second use-side refrigerant cycle 50 can be used for heating in the intermediate period and winter, the cooling and heating can be performed in the intermediate period and winter. The power consumption can be saved by coping with the case of mixed use.

Next, the second embodiment of the multi-room cooling and heating apparatus according to the present invention
Embodiment will be described with reference to the drawings, but the same reference numerals will be given to portions having the same configurations as those in the first embodiment, and detailed description thereof will be omitted.

In FIG. 2, reference numerals 51a and 51b denote cooling / heating only indoor units that can be operated by either the cooling or heating depending on the operation of the first auxiliary heat exchanger 34. The first usage-side refrigerant cycle 49 and the second usage-side refrigerant Each of them is provided in the cycle 50 and is installed in a room or the like where either cooling or heating can be performed.

The other structure is the same as that of the first embodiment, and therefore, the same reference numerals are used here and the description thereof is omitted.

The operation of this refrigerant cycle is also the same as that of the conventional example and the first embodiment, and detailed description thereof will be omitted. However, different from the first embodiment, cooling and heating in the interim period and the like are mixed. The case will be described below.

Even when cooling and heating are mixed in the middle period, there is also an indoor load in which it is not necessary to freely select the heating and cooling operation and only the cooling or heating operation is required. By installing the cooling / heating dedicated indoor units 51a, 51b therein, the cooling / heating capacity can be 100% of the maximum capacity of the cooling / heating dedicated indoor units 51a, 51b.

As described above, the multi-room air conditioner of this embodiment has the heat source side refrigerant cycle 38 formed by connecting the first auxiliary heat exchanger 34 and the second auxiliary heat exchanger 36 in an annular shape, and the first auxiliary heat exchanger. A third auxiliary heat exchanger 39 that is integrally formed with the auxiliary heat exchanger 34 to perform heat exchange, a first refrigerant transfer device 41, and first flow rate valves 45a, 4 provided in the cooling / heating free indoor units 44a, 44b.
5b, the first indoor heat exchangers 46a and 46b, the third flow valve 52a provided with the cooling / heating dedicated indoor unit 51a, and the third indoor heat exchanger 53a, which are connected in a ring shape to the first use-side refrigerant cycle 49; The fourth auxiliary heat exchanger 40, the second refrigerant transfer device 42, the second flow rate valves 47a and 47b, the second indoor heat exchangers 48a and 48b, and the cooling / heating dedicated indoor unit 51b provided in each cooling / heating free indoor unit. Provided third flow valve 52b
Since the second usage-side refrigerant cycle 50 in which the third indoor heat exchanger 53b and the third indoor heat exchanger 53b are annularly connected to each other, both the first usage-side refrigerant cycle 49 and the second usage-side refrigerant cycle 50 are used for cooling in the summer. However, in the interim period and winter, the first use-side refrigerant cycle 49 is used for cooling, and the second use-side refrigerant cycle 50 is used.
Since it can be used for heating, it is possible to cope with the case where the cooling and the heating are mixed in the middle period or the winter, and to save the power.

Further, an indoor unit can be selected according to the indoor load, the capacity of the indoor unit can be fully utilized, and the equipment cost of the indoor unit can be reduced.

Further, by selectively connecting the indoor unit capable of the cooling / heating selective operation and the indoor unit for the switching operation of the cooling / heating,
A variety of air conditioning systems can be accommodated, such as the recent winter air conditioning required for building air conditioning, switching operation between cooling and heating, and selective operation of air conditioning in the middle period.

Next, the third embodiment of the multi-room cooling and heating apparatus according to the present invention
Embodiments will be described with reference to the drawings, but parts having the same configurations as those of the first and second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 3, 34a is a first auxiliary heat exchanger unit having a first auxiliary heat exchanger 34, a third auxiliary heat exchanger 39 and a first refrigerant transfer device 41, and 36a is a second auxiliary heat exchanger 36. And a second auxiliary heat exchanger unit having a fourth auxiliary heat exchanger 40 and a second refrigerant transfer device 42, the outdoor unit 43
Is separated from. The other structure is the same as that of the second embodiment, and therefore, the same reference numerals are used here and the description thereof is omitted.

The operation of this refrigerant cycle is also the same as that of the first embodiment, and detailed description thereof will be omitted. However, the outdoor unit 43, the first auxiliary heat exchanger unit 34a and the second embodiment different from those of the second embodiment are omitted. Second auxiliary heat exchanger unit 36a
The following describes the separation of

The outdoor unit 43 and the first auxiliary heat exchanger unit 3
4a and the second auxiliary heat exchanger unit 36a are separated and connected by a connecting pipe, and the outdoor unit 43, the first auxiliary heat exchanger unit 34a, and the second auxiliary heat exchanger unit 36a.
Can be installed remotely.

As described above, in the multi-room cooling and heating system of this embodiment, the heat source side refrigerant cycle 38 in which the first auxiliary heat exchanger 34 and the second auxiliary heat exchanger 36 are annularly connected, and the third auxiliary heat exchanger The auxiliary heat exchanger 39, the first refrigerant transfer device 41, and the first flow valve 4 provided in each of the cooling / heating free indoor units 44a, 44b.
5a, 45b, the first indoor heat exchangers 46a, 46b, the third flow rate valve 52a provided with the cooling / heating dedicated indoor unit 51a, and the third indoor heat exchanger 53a are connected to each other in the first utilization-side refrigerant cycle 49. , The fourth auxiliary heat exchanger 40, the second refrigerant transfer device 42, the second flow rate valves 47a and 47b and the second indoor heat exchanger 49a provided in each cooling / heating free indoor unit.
49b and the second usage-side refrigerant cycle 50 in which the third flow valve 52b provided in the cooling / heating only indoor unit 51b and the third indoor heat exchanger 53b are annularly connected to each other, so that the first usage-side refrigerant is used in the summer. Because both the cycle 49 and the second usage-side refrigerant cycle 50 can be used for cooling, the first usage-side refrigerant cycle 49 can be used for cooling, and the second usage-side refrigerant cycle 50 can be used for heating in the middle period and winter. Also, it is possible to save power by coping with the case where cooling and heating are mixed in the middle period and winter.

Further, the indoor unit can be selected according to the indoor load, the capacity of the indoor unit can be utilized 100%, and the equipment cost of the indoor unit can be reduced.

Further, since the outdoor unit 43 is separated from the first auxiliary heat exchanger unit 34a and the second auxiliary heat exchanger unit 36a, the capacity of each auxiliary heat exchanger unit can be selected and the outdoor unit can be installed. The flexibility of the work is increased and the workability is improved.

In the embodiment, the outdoor unit, the first auxiliary heat exchanger unit and the second auxiliary heat exchanger unit are separated into three, but may be separated into two.

Next, the fourth embodiment of the multi-room cooling and heating apparatus according to the present invention
Embodiments of the present invention will be described with reference to the drawings, but the same reference numerals will be given to portions having the same configurations as those of the third embodiment, and detailed description thereof will be omitted.

In FIG. 4, reference numeral 54 designates the first refrigerant transfer device 4
1 is an on-off valve which is provided in parallel with 1 and opens during cooling. The first auxiliary heat exchanger unit 34a is installed higher than the cooling / heating free indoor unit 44a installed at the top by a predetermined height (for example, 5 m). The other structure is the same as that of the third embodiment, and therefore, the same reference numerals are used here and the description thereof is omitted.

The operation of this refrigerant cycle is also the same as that of the third embodiment, and detailed description thereof will be omitted. However, when the first use-side refrigerant cycle 49 is cooling, the opening / closing valve 54 is opened, and The 1st refrigerant | coolant conveyance apparatus 41 stops. The operation of the first use-side refrigerant cycle 49 different from the second embodiment will be described below.

In the cooling operation, the refrigerant is transported to the cooling / heating free indoor unit 44a and the cooling / heating only indoor unit 51a by natural circulation transportation due to the gravity of the refrigerant generated due to the height difference between the first auxiliary heat exchanger unit 34a and the cooling / heating free indoor unit 44a. Become.

That is, the refrigerant cooled in the first auxiliary heat exchanger 34 is liquefied and passes through the on-off valve 54 by gravity and the liquid side pipe 4
9a is lowered and is sent to the first flow valve 45a and the third flow valve 52a, is cooled and evaporated in the first indoor heat exchanger 46a and the third indoor heat exchanger 53a, and is passed through the gas side pipe 49b to obtain the first auxiliary heat. It will circulate to the exchanger 34.

As described above, the multi-room cooling and heating system of this embodiment has the heat source side refrigerant cycle 38 in which the first auxiliary heat exchanger 34 and the second auxiliary heat exchanger 36 are connected in an annular shape, and the third auxiliary heat exchanger. The auxiliary heat exchanger 39, the first refrigerant transfer device 41, and the first flow valve 4 provided in each of the cooling / heating free indoor units 44a, 44b.
5a, 45b, the first indoor heat exchangers 46a, 46b, the third flow rate valve 52a provided with the cooling / heating dedicated indoor unit 51a, and the third indoor heat exchanger 53a are connected to each other in the first utilization-side refrigerant cycle 49. , The fourth auxiliary heat exchanger 42, the second refrigerant transfer device 42, the second flow valves 47a, 47b and the second indoor heat exchanger 48a provided in each cooling / heating free indoor unit.
A second use-side refrigerant cycle 50 in which a third flow valve 52b and a third indoor heat exchanger 53b provided in the 48b and the indoor unit 51b dedicated to cooling and heating are connected in an annular shape, and an opening / closing valve in parallel with the first refrigerant transfer device 41. 54, and the first auxiliary heat exchanger unit 34a is located above the uppermost indoor unit by a predetermined height. In the summer, the first use-side refrigerant cycle 49 and the second use-side refrigerant cycle Both cycles 50 are used for cooling, and the first use side refrigerant cycle 49
Can be used for cooling, and the second use-side refrigerant cycle 50 can be used for heating. Therefore, it is possible to cope with the case where cooling and heating are mixed in the middle period or winter, and to save power.

Further, the indoor unit can be selected according to the indoor load, the capacity of the indoor unit can be utilized 100%, and the equipment cost of the indoor unit can be reduced.

Further, since it is not necessary to operate the first refrigerant transfer device 41 during the cooling operation, energy can be saved.

In this embodiment, the first use-side refrigerant cycle 49 has been described, but the second use-side refrigerant cycle 50 is also applicable. When the first auxiliary heat exchanger unit 34a or the second auxiliary heat exchanger unit 36a is located below, the refrigerant transfer devices 41 and 42 are stopped during heating, and the on-off valve 54 is opened to perform natural circulation transfer. You can

[0062]

As described above, the multi-room cooling and heating apparatus of the present invention includes the heat source side refrigerant cycle formed by connecting the first auxiliary heat exchanger and the second auxiliary heat exchanger in an annular shape, and the third auxiliary heat exchanger. A heat exchanger, a first refrigerant transfer device, a first flow rate valve provided in each cooling / heating free indoor unit, and a first use-side refrigerant cycle in which the first indoor heat exchanger is annularly connected, and the fourth auxiliary heat An exchange,
Since the second refrigerant carrier device and the second usage-side refrigerant cycle in which the second flow valve and the second indoor heat exchanger provided in each cooling / heating free indoor unit are connected in a ring shape are provided, the first usage in the summer Since both the side-use refrigerant cycle and the second use-side refrigerant cycle can be used for cooling, and the first use-side refrigerant cycle can be used for cooling and the second use-side refrigerant cycle for heating in the middle period and winter, Power consumption can be saved by coping with the case where cooling and heating are mixed in the season and winter.

Further, the heat source side refrigerant cycle formed by connecting the first auxiliary heat exchanger and the second auxiliary heat exchanger in an annular shape, the third auxiliary heat exchanger, the first refrigerant transfer device, and each cooling / heating system. A first use-side refrigerant cycle in which a first flow valve provided in a free indoor unit, a first indoor heat exchanger, and a third flow valve provided in each indoor unit dedicated to heating and cooling and a third indoor heat exchanger are annularly connected. When,
The fourth auxiliary heat exchanger, the second refrigerant transfer device, the second flow valve provided in each cooling / heating free indoor unit, and the third flow valve provided in the second indoor heat exchanger and the cooling / heating only indoor unit. Since the second use-side refrigerant cycle in which the third indoor heat exchanger is connected in a ring shape is provided, both the first use-side refrigerant cycle and the second use-side refrigerant cycle are used for cooling in the summer, and In the winter, the first use-side refrigerant cycle can be used for cooling and the second use-side refrigerant cycle can be used for heating. Therefore, it is possible to cope with the case where both cooling and heating are mixed in the interim period and the winter, thereby saving power. be able to.

Further, an indoor unit can be selected according to the indoor load, the capacity of the indoor unit can be fully utilized, and the equipment cost of the indoor unit can be reduced.

Further, by selectively connecting the indoor unit capable of the cooling / heating selective operation and the indoor unit for the switching operation of the cooling / heating,
A variety of air conditioning systems can be accommodated, such as the recent winter air conditioning required for building air conditioning, switching operation between cooling and heating, and selective operation of air conditioning in the middle period.

Further, the heat source side refrigerant cycle formed by connecting the first auxiliary heat exchanger and the second auxiliary heat exchanger in an annular shape, the third auxiliary heat exchanger, the first refrigerant transfer device, and the respective cooling / heating A first use-side refrigerant cycle in which a first flow valve provided in a free indoor unit, a first indoor heat exchanger, and a third flow valve provided in each indoor unit dedicated to heating and cooling and a third indoor heat exchanger are annularly connected. When,
The fourth auxiliary heat exchanger, the second refrigerant transfer device, the second flow valve provided in each cooling / heating free indoor unit, and the third flow valve provided in the second indoor heat exchanger and the cooling / heating only indoor unit. Since the second use-side refrigerant cycle in which the third indoor heat exchanger is connected in a ring shape is provided, both the first use-side refrigerant cycle and the second use-side refrigerant cycle are used for cooling in the summer, and In the winter, the first use-side refrigerant cycle can be used for cooling and the second use-side refrigerant cycle can be used for heating. Therefore, it is possible to cope with the case where both cooling and heating are mixed in the interim period and the winter, thereby saving power. be able to.

Further, the indoor unit can be selected according to the indoor load, the capacity of the indoor unit can be utilized 100%, and the equipment cost of the indoor unit can be reduced.

Furthermore, since the outdoor unit is separated from the first auxiliary heat exchanger unit and the second auxiliary heat exchanger unit,
While the capacity of each auxiliary heat exchanger unit can be selected,
The degree of freedom of installation is increased and the workability is improved.

Further, the heat source side refrigerant cycle formed by connecting the first auxiliary heat exchanger and the second auxiliary heat exchanger in an annular shape, the third auxiliary heat exchanger, the first refrigerant transfer device, and each cooling / heating system. A first use-side refrigerant cycle in which a first flow valve provided in a free indoor unit, a first indoor heat exchanger, and a third flow valve provided in each indoor unit dedicated to heating and cooling and a third indoor heat exchanger are annularly connected. When,
The fourth auxiliary heat exchanger, the second refrigerant transfer device, the second flow valve provided in each cooling / heating free indoor unit, and the third flow valve provided in the second indoor heat exchanger and the cooling / heating only indoor unit. A second utilization-side refrigerant cycle in which a third indoor heat exchanger is connected in an annular shape, and an opening / closing valve in parallel with the first refrigerant transfer device are provided, and the first auxiliary heat exchanger unit is provided more than the uppermost indoor unit. It is located at the upper part of a predetermined height, and uses both the first use-side refrigerant cycle and the second use-side refrigerant cycle for cooling during the summer, and cools the first use-side refrigerant cycle during the interim period and winter. For this reason, the second use-side refrigerant cycle can be used for heating, so that it is possible to cope with the case where cooling and heating are mixed in the middle period or winter, and to save power.

Further, the indoor unit can be selected according to the indoor load, the capacity of the indoor unit can be fully utilized, and the equipment cost of the indoor unit can be reduced.

Further, since it is not necessary to operate the first refrigerant transfer device during the cooling operation, energy can be saved.

[Brief description of drawings]

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

FIG. 2 is a refrigeration cycle diagram of a multi-room air conditioner according to a second embodiment of the present invention.

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

FIG. 4 is a refrigeration cycle diagram of a multi-room cooling and heating apparatus according to a fourth embodiment of the present invention.

FIG. 5 is a refrigeration cycle diagram of a conventional multi-room air conditioner

[Explanation of symbols]

 30 compressor 32 heat source side heat exchanger 33 1st decompression device 34 1st auxiliary heat exchanger 34a 1st auxiliary heat exchanger unit 35 2nd decompression device 36 2nd auxiliary heat exchanger 36a 2nd auxiliary heat exchanger unit 39 Third auxiliary heat exchanger 40 Fourth auxiliary heat exchanger 41 First refrigerant transfer device 42 Second refrigerant transfer device 43 Outdoor units 44a, 44b Cooling / heating free indoor units 45a, 45b First flow valves 46a, 46b First indoor heat exchange Vessel 47a, 47b second flow valve 48a, 48b second indoor heat exchanger 49 first usage-side refrigerant cycle 50 second usage-side refrigerant cycle 51a, 51b cooling / heating dedicated indoor unit 52a, 52b third flow valve 53a, 53b third Indoor heat exchanger 54 Open / close valve

Claims (4)

[Claims] 1. A heat source in which a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, a first auxiliary heat exchanger, a second pressure reducing device and a second auxiliary heat exchanger are connected in an annular shape. The side refrigerant cycle, the third auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger to exchange heat, the first refrigerant transfer device, and the cooling / heating free indoor unit that can freely select the heating / cooling operation are provided. A first utilization-side refrigerant cycle in which a first flow valve and a first indoor heat exchanger are connected in an annular shape, a fourth auxiliary heat exchanger that is integrally formed with the second auxiliary heat exchanger, and exchanges heat, a second refrigerant carrier A multi-chamber cooling / heating apparatus comprising: a device, a second flow valve provided in each of the cooling / heating free indoor units, and a second usage-side refrigerant cycle in which a second indoor heat exchanger is connected in an annular shape. 2. A heat source formed by connecting a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, a first auxiliary heat exchanger, a second pressure reducing device and a second auxiliary heat exchanger in an annular shape. The side refrigerant cycle, the third auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger to exchange heat, the first refrigerant transfer device, and the cooling / heating free indoor unit that can freely select the heating / cooling operation are provided. A first flow rate valve, a first indoor heat exchanger, and a first use-side refrigerant cycle in which a third flow valve and a third indoor heat exchanger provided in each of the cooling / heating only indoor units capable of operating one of cooling and heating A fourth auxiliary heat exchanger that is integrally formed with the second auxiliary heat exchanger to exchange heat, a second refrigerant transfer device, a second flow valve and a second indoor heat exchanger provided in each of the cooling / heating free indoor units And a second advantage in which a third flow valve provided in the cooling / heating indoor unit and a third indoor heat exchanger are connected in an annular shape. A multi-room cooling and heating device equipped with a use side refrigerant cycle. 3. A heat source formed by connecting a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, a first auxiliary heat exchanger, a second pressure reducing device and a second auxiliary heat exchanger in an annular shape. The side refrigerant cycle, the third auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger to exchange heat, the first refrigerant transfer device, and the cooling / heating free indoor unit that can freely select the heating / cooling operation are provided. A first flow rate valve, a first indoor heat exchanger, and a first use-side refrigerant cycle in which a third flow valve and a third indoor heat exchanger provided in each of the cooling / heating only indoor units capable of operating one of cooling and heating A fourth auxiliary heat exchanger that is integrally formed with the second auxiliary heat exchanger to exchange heat, a second refrigerant transfer device, a second flow valve and a second indoor heat exchanger provided in each of the cooling / heating free indoor units And a second benefit in which a third flow valve provided in each of the cooling / heating indoor units and a third indoor heat exchanger are connected in an annular shape. An outdoor unit including a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, and a second pressure reducing device, and a first auxiliary heat exchanger and a third auxiliary heat exchanger. A first auxiliary heat exchanger unit having an auxiliary heat exchanger and a first refrigerant transfer device, and a second auxiliary heat exchanger unit having a second auxiliary heat exchanger, a fourth auxiliary heat exchanger, and a second refrigerant transfer device. And a multi-room air conditioner with. 4. A heat source formed by connecting a compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, a first auxiliary heat exchanger, a second pressure reducing device and a second auxiliary heat exchanger in an annular shape. The side refrigerant cycle, a third auxiliary heat exchanger that is integrally formed with the first auxiliary heat exchanger and exchanges heat, a first flow valve and a first flow valve provided in each cooling / heating free indoor unit that can freely select heating / heating. 1st indoor heat exchanger and the 1st utilization side refrigerant cycle which connected the 3rd flow valve and the 3rd indoor heat exchanger which were provided in the indoor unit for exclusive use of cooling and heating which can operate either one side, and the said 2nd auxiliary heat A fourth auxiliary heat exchanger that is integrally formed with the exchanger to perform heat exchange, a second refrigerant transfer device, a second flow valve and a second indoor heat exchanger provided in each of the cooling / heating free indoor units, and each of the cooling / heating dedicated chambers. Second use-side refrigerant cycle in which a third flow valve provided in the machine and a third indoor heat exchanger are annularly connected And an outdoor unit having the compressor, a heat source side four-way valve, a heat source side heat exchanger, a first pressure reducing device, and a second pressure reducing device, the first auxiliary heat exchanger, and a third auxiliary heat exchanger. A first auxiliary heat exchanger unit having the first refrigerant transfer device, a second heat exchanger unit having a second auxiliary heat exchanger, a fourth auxiliary heat exchanger, and a second refrigerant transfer device;
A multi-chamber cooling and heating device comprising an opening / closing valve in parallel with the first refrigerant transporting device, wherein the first auxiliary heat exchanger unit is located at a predetermined height above an uppermost indoor unit.