JPH02195134A - Multi-room air cooling and heating device - Google Patents

Abstract

PURPOSE:To make it possible to select freely cooling operation or heating operation by a fourth auxiliary heat exchanger which is integrally formed with a third auxiliary heat exchanger and carries out heat exchange and providing an auxiliary refrigerant cycle which is continuously connected with said fourth auxiliary heat exchanger, an auxiliary compressor, an auxiliary indoor heat exchanger, an auxiliary four way valve, and an auxiliary decompression device in a loop. CONSTITUTION:A refrigerant cycle is separated into a heat side and an application side. To the application side refrigerant cycle are installed a main indoor unit 24 having an application side heat exchanger 23, and a third auxiliary heat exchanger 26. A fourth auxiliary heat exchanger 27 is installed in such a manner that it may be integrally formed with the third auxiliary heat exchanger to carry out heat exchange. Moreover, is provided an auxiliary refrigerant cycle which is continuously connected with the fourth auxiliary heat exchanger, an auxiliary compressor 28, an auxiliary indoor heat exchanger 31, an auxiliary four way valve 29, and an auxiliary decompression device 30 in a loop, which allows the auxiliary refrigerant cycle to perform cooling or heating operation irrespective of the drive of the heat side refrigerant cycle and the application cycle. Therefore, the respective indoor units 24 and 23, even if an outdoor unit f is a single set, are capable of selecting cooling operation or heating operation.

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 A conventional refrigerant cycle for a multi-room air conditioning system that separates a heat source side refrigerant cycle and a user side refrigerant cycle and exchanges heat between the two with an auxiliary heat exchanger is disclosed in Japanese Patent Laid-Open No. 62-238954. It looks like Figure 2.

In the figure, 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, 15 is a heating pressure reducing device, and 16 is a check that closes the cooling pressure reducing device 14 during heating. A valve 17 is a check valve that closes the pressure reducing device 16 for heating during cooling, and 18° is a first auxiliary heat exchanger that connects these in an annular shape.
It forms a heat source side refrigerant cycle. 19 is a second auxiliary heat exchanger that adjusts the amount of refrigeration. J21 is a refrigerant conveyance device which has a reversible characteristic in which the outflow direction of the refrigerant is opposite during cooling and heating, and is housed in the outdoor unit) f. 22a and 22b are heat exchangers on the user side, which are housed in indoor units q and h, and are connected to connecting pipes i.

It is connected to the outdoor unit) f at t' + J * i'.

The second auxiliary heat exchanger 19, the refrigerant amount adjustment tank 20, and the refrigerant conveyance device 21. Usage side heat exchanger 22a.

22b and the connecting pipe '+l'e J*]' are connected in an annular manner 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 is indicated by the solid line in the figure. In the refrigerant cycle on the heat source side, high-temperature, high-pressure gas from the compressor 11 passes through the four-way valve 12, radiates heat in the heat exchanger 13 on the heat source side, condenses and liquefies, and passes through the check valve. 16 and is depressurized by the cooling expansion valve 14.
It is evaporated in the auxiliary heat exchanger 18 and passed through the four-way valve 12 to the compressor 1.
At this time, the second auxiliary heat exchanger 19 of the user-side refrigerant cycle and the first auxiliary heat exchanger 18 exchange heat,
The gas refrigerant in the user refrigerant cycle is cooled and liquefied,
The refrigerant is sent to the refrigerant transport device 21 through the refrigerant amount adjustment tank 2o, and is sent to the user-side heat exchangers 22a, 22b through the connection pipes i, i, where it absorbs heat and evaporates, gasifies, and connects. Piping 1/.

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 by the heating pressure reducing device 16 from the check valve 17, 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 the connecting pipes 1 / , + /
The refrigerant is sent to the user-side heat exchanger 22 through heating, radiates heat, is liquefied, is sent to the refrigerant conveying device 21 through the connecting pipes i and j, and is circulated from the refrigerant amount adjustment tank 2o to the second auxiliary heat exchanger 19. do.

Problems to be Solved by the Invention However, with the above configuration, the indoor unit l'qth can only operate in the same manner as the outdoor unit f. For example, if the outdoor unit 22) f is for cooling, the indoor units g and h can only be used for cooling.

Therefore, depending on the indoor load during the interim period, if some rooms require cooling operation and others require heating operation, a separate heating and cooling system must be installed as it is not possible to operate both at the same time. The problem was that the device was complicated.

In view of the above-mentioned problems, the present invention provides a multi-room air conditioning and heating system that has a simple configuration, has one outdoor unit, and allows each indoor unit to freely select cooling operation or heating operation.

Means for Solving the Problems In order to solve the above problems, the multi-room air conditioning system of the present invention separates the heat source side refrigerant cycle and the usage side refrigerant cycle,
a second auxiliary heat exchanger for the heat source side refrigerant cycle and the use side refrigerant cycle, an outdoor unit equipped with a refrigerant transfer device, and a use side heat exchanger; an indoor unit, a fourth auxiliary heat exchanger and an auxiliary compression rock that are formed integrally with the third auxiliary heat exchanger and exchange heat therewith;

It is equipped with an auxiliary refrigerant cycle in which an auxiliary indoor heat exchanger, an auxiliary pressure reducing device, and an auxiliary four-way valve are connected in an annular manner, and the third auxiliary heat exchanger and an auxiliary refrigerant cycle, allowing for the same operation or different operation as the heat source side unit. It is equipped with an auxiliary indoor unit.

Effects According to the present invention, with the above-described configuration, it is possible to select heating and cooling operation for each indoor unit with respect to one outdoor unit.

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 shows a refrigerant cycle of a multi-room air conditioning system according to an embodiment of the present invention.

In the figure, 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, 16 is a heating pressure reducing device, and 16 is a check that closes the cooling pressure reducing device 14 during heating. Valve 17 is a check valve that closes the pressure reducing device 16 for heating during cooling, and 1B is a first auxiliary heat exchanger, which are connected in an annular manner to form a heat source side refrigerant cycle. A second auxiliary heat exchanger 19 is integrally formed to exchange heat with the first auxiliary heat exchanger 18. 20 is a refrigerant amount adjustment tank that adjusts the amount of refrigeration 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 is housed in an outdoor unit) f. 23 is a user-side heat exchanger, which is housed in the main indoor unit 24, and 26 is a third auxiliary heat exchanger, which is connected to a connecting pipe 25a.
, 25b.

It is connected to the outdoor unit) f at 25C.

27 is a fourth auxiliary heat exchanger formed integrally with the third auxiliary heat exchanger to exchange heat, 28 is an auxiliary compressor, 29 is an auxiliary four-way valve, 30 is an auxiliary pressure reducing device, and 31 is an auxiliary indoor heat exchanger. Heating and cooling can be performed by the auxiliary compressor 28, which is housed in the auxiliary indoor unit 32.

The second auxiliary heat exchanger 19, the refrigerant amount adjustment tank 20, and the refrigerant conveyance device 21. Utilization side heat exchanger 23°, third auxiliary heat exchanger 26 and connection piping 26a.

25b, 250 are connected in an annular manner to form a utilization side refrigerant cycle, and the fourth auxiliary heat exchanger 27. Auxiliary compressor 28. Auxiliary four-way valve 29. The auxiliary pressure reducing device 30 and the auxiliary indoor heat exchanger 31 are connected in an annular manner to form an auxiliary 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 is indicated by the solid line in the figure. In the refrigerant cycle on the heat source side, high-temperature, high-pressure gas from the compressor 11 passes through the four-way valve 12, radiates heat in the heat source side heat exchanger 13, condenses and liquefies, and passes through the reversal valve 16. The pressure is reduced by the cooling expansion valve 14 through the
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 the refrigerant transport device 21 connects the connecting pipes i, j, 25b, and the third auxiliary heat exchanger 26. The user side heat exchanger 2 passes through the connection pipe 25c.
3, where it is endothermically evaporated, gasified, and circulated through the connecting pipe 25a to the second auxiliary heat exchanger 19.

At this time, the third auxiliary heat exchanger 26 of the user-side refrigerant cycle and the fourth auxiliary heat exchanger 27 of the auxiliary refrigerant cycle exchange heat.

Therefore, when the auxiliary indoor unit 32 is in cooling operation, in the auxiliary refrigerant cycle, high-temperature, high-pressure gas from the auxiliary compressor 28 passes through the auxiliary four-way valve 29, and the fourth auxiliary heat exchanger 2
It releases heat and is condensed and liquefied at 7, is depressurized by the auxiliary pressure reducing device 30, is endothermically evaporated and cooled by the auxiliary indoor heat exchanger 31, and is circulated through the auxiliary four-way valve 29 to the auxiliary compressor 28. In addition, when the auxiliary indoor unit 32 is in heating operation, the high-temperature, high-pressure gas from the auxiliary compressor 28 is sent to the auxiliary indoor heat exchanger 31 through the auxiliary four-way valve 29, liquefies heat and heats it, and auxiliary pressure reduction. It is depressurized in the device 3o, endothermically evaporated in the fourth auxiliary heat exchanger 27, and circulated through the auxiliary four-way valve 29 to the auxiliary compressor 28.

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 by the heating pressure reducing device 15 from the check valve 17, 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 25a. It is sent to the side heat exchanger 23, heated, liquefied heat, and sent to the refrigerant conveying device 21 through the connection pipe 25C1, third auxiliary heat exchanger 26° connection pipe 25b, and from the refrigerant amount adjustment tank 20 to the second auxiliary heat Circulate to exchanger 19.

At this time, the third auxiliary heat exchanger 26 of the user side refrigerant cycle and the fourth auxiliary heat exchanger 27 of the auxiliary refrigerant cycle exchange heat.

Therefore, when the auxiliary indoor unit 32 is in cooling operation, in the auxiliary refrigerant cycle, high-temperature, high-pressure gas from the auxiliary compressor 28 passes through the auxiliary four-way valve 29, and the fourth auxiliary heat exchanger 2
It releases heat and condenses and liquefies at 7, is depressurized by the auxiliary pressure reducing device 3o, is endothermically evaporated and cooled by the auxiliary indoor heat exchanger 31, and is circulated through the auxiliary four-way valve 29 to the auxiliary pressure alii 28.

As described above, according to this embodiment, the heat source side refrigerant cycle and the user side refrigerant cycle are separated, and the user side refrigerant cycle includes a main indoor unit having a user side heat exchanger, and a third
An auxiliary heat exchanger is provided, and a fourth auxiliary heat exchanger is provided which is formed integrally with the third auxiliary heat exchanger to exchange heat, and the fourth auxiliary heat exchanger, the auxiliary compressor, the auxiliary indoor heat exchanger, and the auxiliary heat exchanger are provided. Equipped with an auxiliary refrigerant cycle in which a four-way valve and an auxiliary pressure reducing device are connected in a ring, there is a heat source side refrigerant cycle and a user side cooling.Therefore, with only one outdoor unit, each indoor unit can freely choose between cooling or heating operation. It will be possible.

In the embodiment, there is one main indoor unit and one auxiliary indoor unit, but it goes without saying that any number of units may be used.

Effects of the Invention As described above, the present invention separates the refrigerant cycle into a heat source side refrigerant cycle and a user side refrigerant cycle, and provides a main indoor unit having a user side heat exchanger and a third auxiliary heat exchanger in the user side refrigerant cycle. , a fourth auxiliary heat exchanger is provided which is integrally formed with the third auxiliary heat exchanger to exchange heat, and the fourth auxiliary heat exchanger, an auxiliary compressor, an auxiliary indoor heat exchanger, an auxiliary four-way valve, and an auxiliary pressure reducing device are provided. Since the auxiliary refrigerant cycle is provided with annularly connected auxiliary refrigerant cycles, the auxiliary refrigerant cycle can perform cooling or heating operation regardless of the operation of the heat source side refrigerant cycle and the user side refrigerant cycle.

Therefore, with one outdoor unit, each indoor unit can freely choose between cooling operation or heating operation, and it can be used indoors where cooling operation is required depending on the indoor load such as during the interim period, and indoor unit where heating operation is required. This has the effect of allowing outdoor units (7) to be operated simultaneously with a single simple configuration when

[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... Heat source side compressor, 13... Heat source side heat exchanger, 18... First auxiliary heat exchanger, 19
... Second auxiliary heat exchanger, 21 ... Refrigerant conveyance device, 23 ... User-side heat exchanger, 24 ...
...Main indoor unit, 26...Third auxiliary heat exchanger, 27...Fourth auxiliary heat exchanger, 28...
... Auxiliary compressor, 29 ... Auxiliary four-way valve, 30
...Auxiliary pressure reducing device, 31...Auxiliary indoor heat exchanger, 32...Auxiliary indoor unit, f...
...Outdoor unit. Name of agent: Patent attorney Shigetaka Awano and 1 other list
2 Figure

Claims (1)

[Claims] A heat source side refrigerant cycle formed by connecting a heat source side compressor, a heat source side four-way valve, a heat source side heat exchanger, a heat source side pressure reducing device, and a first auxiliary heat exchanger in an annular manner, and integrally with the first auxiliary heat exchanger. a second auxiliary heat exchanger and a refrigerant conveying device for forming and exchanging heat;
An outdoor unit including a usage-side refrigerant cycle in which a third auxiliary heat exchanger and a usage-side heat exchanger are connected in an annular manner, a second auxiliary heat exchanger of the heat source-side refrigerant cycle and the usage-side refrigerant cycle, and a refrigerant transfer device. , a main indoor unit that includes a user-side heat exchanger and operates in the same manner as the heat source-side refrigerant cycle, and a fourth auxiliary heat exchanger that is formed integrally with the third auxiliary heat exchanger to exchange heat
an auxiliary refrigerant cycle formed by connecting an auxiliary heat exchanger, an auxiliary compressor, an auxiliary indoor heat exchanger, an auxiliary pressure reducing device, and an auxiliary four-way valve in an annular manner, and the third auxiliary heat exchanger and the auxiliary refrigerant cycle, the heat source side A multi-room air conditioning system equipped with an auxiliary indoor unit that can be operated in the same way as the unit or in a different way.