JPH0452434A - Multi-chamber cooling/heating device - Google Patents

Abstract

PURPOSE:To make it possible to exert the whole function as one system by installing a plurality of heat source side refrigerant cycle which is freely communicated with a compressor, a heat side heat exchanger, a decompression device, and a first auxiliary heat exchanger in circular shape, a second auxiliary heat exchanger, a third auxiliary heat exchanger, and a fourth auxiliary heat exchanger. CONSTITUTION:When the load of indoor units q and h for a first system is increased while the load of indoor units q' and h' are small during cooling operation, the refrigerant of a user side refrigeration cycle for the first system is distributed to a third auxiliary heat exchanger 23 by way of connection pipelines k and l while the refrigerant of a user side for a second system is distributed to a fourth auxiliary heat exchanger 24 by way of connection pipelines k' and l', which moves the cooling power from the second system to the first system, thereby upgrading the power of the first system and responding to the load requirement. This is applicable to heating performance.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a refrigerant cycle for a multi-room heating and cooling system.

2. Description of the Related Art Conventionally, a multi-room air-conditioning system in which a refrigerant cycle is separated into a heat source side and a user side is disclosed in Japanese Patent Application Laid-Open No. 62-272040, as shown in FIG.

FIG. 2 shows a refrigerant cycle of a conventional multi-room air conditioning system. In FIG. 2, 11 is a compressor, 12 is a four-way valve, 13 is a heat source side heat exchanger, 14 is a cooling pressure reducing device, 1
5 is a pressure reducing device for heating, 16 is a pressure reducing device 14 for cooling during heating.
A check valve that closes the

17 is a check valve that closes the heating vacuum bag @ 15 during cooling, 1
Reference numeral 8 denotes a first auxiliary heat exchanger, which is connected in a ring shape. 2o is a refrigerant amount adjustment tank that adjusts the amount of refrigerant during cooling and heating. Reference numeral 21 denotes a refrigerant conveying device which has a reversible characteristic in which the outflow direction of the refrigerant is opposite during cooling and heating, and these are housed in outdoor units) f and f/. 2
2a.

22b, 22c, and 22d are heat exchangers on the user side, which are housed in the indoor units)'lq'th and h', and are connected to the connecting pipes i.

It is connected to outdoor units) f and f' at j.

The second auxiliary heat exchanger 19, the refrigerant amount adjustment tank 20°, the refrigerant conveyance device 21, and the user-side heat exchangers 22a and 22b.
.

22c, 22d and connecting pipes i and j are connected in a ring to form a user-side refrigerant cycle.

The operation of the multi-room heating and cooling system configured as described above will be explained.

During cooling operation, the refrigerant cycle shown by the solid line in the figure is used.In the refrigerant cycle on the heat source side, the high temperature and high pressure gas from the compressor 11 passes through the four-way valve 122, radiates heat in the heat exchanger 13 on the heat source side, condenses and liquefies, and reverses the cycle. It passes through the stop valve 16 and is depressurized by the cooling expansion valve 14.
Evaporates in the auxiliary heat exchanger 18 and passes through the four-way valve 12 to the compressor 1
Cycle to 2.

At this time, the second auxiliary heat exchanger 19 of the user-side refrigerant cycle and the first auxiliary heat exchanger 18 exchange heat, and the gas refrigerant in the user-side refrigerant cycle is cooled and liquefied, and passes through the refrigerant amount adjustment tank 2o. The refrigerant is sent to the refrigerant transport device 21, and is passed through the connection pipe i by the refrigerant transport device 21 to the user side heat exchanger 2.
2&, 22b.

22c and 22d, where it is endothermically evaporated, gasified, and circulated through the connecting pipe j to the second auxiliary heat exchanger 19.

On the other hand, during heating operation, the refrigerant cycle is indicated 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, radiates heat and condenses. It is liquefied, the pressure is reduced from the check valve 17 with the heating pressure reducing device @ 15, and it is endothermically evaporated in the heat source side heat exchanger 13.
It circulates through the four-way valve 12 to the compressor 11. At this time, the second auxiliary heat exchanger 19 of the user-side refrigerant cycle and the first auxiliary heat exchanger 18 exchange heat, and the liquid refrigerant in the user-side refrigerant cycle is heated and gasified, and is used through the connecting pipe j. The refrigerant is sent to the side heat exchangers 22 a , 22 b , 22 c, and 22 d, heated, radiated, liquefied, passed through the connecting pipe i, sent to the refrigerant conveying device 21, and sent from the refrigerant amount adjustment tank 2o to the second auxiliary heat exchanger 19. circulate.

Problems to be Solved by the Invention However, in the above configuration, as the number of outdoor units and indoor units increases in one system, the amount of refrigerant sealed in the user-side refrigerant cycle increases. Therefore, there have been problems such as an increased risk of refrigerant leakage and poor maintainability.

In view of the above problems, the present invention reduces the number of outdoor units and indoor units in one system, reduces the amount of refrigerant in the user side refrigerant cycle of each system, and has the function of the entire system as one system. The present invention provides a multi-room air conditioning system.

Means for Solving the Problems In order to solve the above problems, the multi-room air conditioning system of the present invention has the following features:
A compressor, a heat source side heat exchanger, a pressure reducing device, and a first auxiliary heat exchanger A plurality of heat source side refrigerant cycles connected in a ring shape, and a first auxiliary heat exchanger integrally formed with each of the first auxiliary heat exchangers to exchange heat. 2 auxiliary heat exchangers, a refrigerant transport device, and a plurality of user-side refrigerant cycles formed by connecting a plurality of user-side heat exchangers in an annular manner; and a third auxiliary heat exchanger through which the refrigerant of at least one user-side refrigerant cycle flows. and a fourth auxiliary heat exchanger that is formed integrally with the third auxiliary heat exchanger to exchange heat therewith, and through which refrigerant of at least one other user-side refrigerant cycle flows.

Effects The present invention has the above-described configuration, which separates the two systems to reduce the amount of refrigerant in each user-side refrigerant cycle, and allows the entire system to function as one system, such as expanding the capacity control range and improving workability. This means that the heat source capacity can be reduced.

EXAMPLE Hereinafter, a multi-room air conditioning system according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a refrigerant cycle diagram of the multi-room air conditioning system of the present invention, which is almost the same as the conventional example, and only the differences will be explained here.

outdoor unit) f is indoor unit) q, h and connecting piping i+1
to form a first system, and an outdoor unit f
' is connected to indoor units q', h' through connecting pipes il, j/ to form a second system. A third auxiliary heat exchanger 23 connected to the connecting pipe 1 branched from the connecting pipe 'p) of the first system, and a fourth auxiliary heat exchanger formed integrally with the third auxiliary heat exchanger to exchange heat. An exchanger 24 is provided,
This fourth auxiliary heat exchanger 24 is connected to connecting pipes / and 1 / branched from the connecting pipes i/ and j/ of the second system.

The operation is basically the same as the conventional example, and only the differences will be explained here. For example, the indoor unit q of the first system during cooling operation.

The load on h increases and the indoor unit q'h' of the second system
When the load of
At the same time, the refrigerant is distributed to the refrigerant of the user-side refrigerant cycle of the second system and the connecting piping.

1' causes the air to flow through the fourth auxiliary heat exchanger 24, transferring the cooling capacity from the second system to the first system, and increasing the capacity of the first system to cope with the load.

The same applies to heating, so it will be omitted here.

As described above, according to this embodiment, the amount of refrigerant in each system can be reduced by separating into two systems, and the capacity can be transferred between both systems, allowing the entire system to function as one system. Become.

Furthermore, since the refrigerant cycle is separated into a heat source side refrigerant cycle and a user side refrigerant cycle, direct capacity transfer is possible between the two systems, which increases the amount of capacity transfer.

Therefore, the whole becomes even more like a single system.

Effects of the Invention As described above, the multi-room air conditioning system of the present invention includes a plurality of heat source side refrigerant cycles formed by connecting a compressor, a heat source side heat exchanger, a pressure reducing device, and a first auxiliary heat exchanger in an annular manner; each first
Two user-side refrigerant cycles formed by connecting a second auxiliary heat exchanger integrally with the auxiliary heat exchanger to exchange heat, a refrigerant conveying device, and a plurality of user-side heat exchangers in a ring shape, and at least one user-side refrigerant cycle. A third auxiliary heat exchanger through which the refrigerant of the refrigerant cycle flows, and a fourth auxiliary heat exchanger formed integrally with the third auxiliary heat exchanger to exchange heat and through which the refrigerant of at least one other user-side refrigerant cycle flows. Equipped with an exchanger, it is possible to separate the systems and reduce the amount of refrigerant in each system, and it is also possible to transfer capacity between each system, reducing the overall
This means that the functions of one system can be obtained.

Therefore, the range of capacity control is expanded, which has the effect of improving workability and reducing heat source capacity.

[Brief explanation of the drawing]

FIG. 1 is a refrigerant cycle diagram of a multi-room air conditioning system according to an embodiment of the present invention, and FIG. 2 is a refrigerant cycle diagram of a conventional multi-room air conditioning system. 11... Compressor, 13... Heat source side heat exchanger, 18... First auxiliary heat exchanger, 19...
...Second auxiliary heat exchanger, 21...Refrigerant conveyance device, 22a, 22b, 22c. 22d... User side heat exchanger, 23. Mountain... 3rd
Auxiliary heat exchanger, 24... Fourth auxiliary heat exchanger. Name of agent: Patent attorney Shigetaka Awano and 1 other person
sI% P Fishing net IP Exchange Broadcasting RO 1 catch heat exchange sacrificial a Akira 2 order; 1R

Claims (1)

[Claims] A plurality of heat source side refrigerant cycles formed by connecting a compressor, a heat source side heat exchanger, a pressure reducing device, and a first auxiliary heat exchanger in an annular manner; 2 auxiliary heat exchangers, a refrigerant transport device, and a plurality of user-side refrigerant cycles formed by connecting a plurality of user-side heat exchangers in an annular manner; and a third auxiliary heat exchanger through which the refrigerant of at least one user-side refrigerant cycle flows. and a fourth auxiliary heat exchanger that is formed integrally with the third auxiliary heat exchanger to exchange heat with the third auxiliary heat exchanger, and through which the refrigerant of at least one other user-side refrigerant cycle flows.