JPS62238954A - Air conditioner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a refrigerant cycle for a heating and cooling system.

Conventional technology The refrigerant cycle of conventional heat pump type air-conditioning equipment is
It is configured as shown in the figure. In the figure, 1 is a compressor, 2
is a four-way valve, 3 is a heat exchanger on the heat source side, 4 is a heating pressure reducing device,
6 is a check valve that forms a passage that bypasses the heating pressure reducing device 4 during cooling, 8 is a cooling pressure reducing device, 7 is a check valve that forms a passage that bypasses the cooling pressure reducing device 6 during heating, and 8 is used. The side heat exchanger 9 is an accumulator, and these are connected in a ring to form a well-known refrigerant cycle.

In recent years, the scope of use of air conditioning has expanded, and it has become necessary to cool computer rooms, etc., even in the middle of the year and in winter.

Problems to be Solved by the Invention However, with the above configuration, when the compressor is operated during cooling operation during the intermediate season or winter, the user side heat exchanger may become frosted due to the extreme drop in evaporation pressure, causing the compressor to freeze. This had the problem of causing liquid back-up in the air, damaging the compressor and making cooling operation impossible.

Means for Solving the Problems In order to solve the above-mentioned problems, the air conditioning system of the present invention has a heat source side heat exchanger, which is 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. A user-side refrigerant cycle comprising a refrigerant cycle, a second auxiliary heat exchanger that is formed integrally with the first auxiliary heat exchanger and exchanges heat, a refrigerant transport device, and a user-side heat source heat exchanger connected in an annular shape. It is something.

Effects of the present invention With the above-described configuration, when the outdoor temperature is low in the middle season or winter, the operation of the heat source side refrigerant cycle is stopped and only the user side refrigerant cycle is operated, and the heat source heat exchanger on the user side radiates heat to the outside air for cooling. The cooled refrigerant is sent to the user-side heat exchanger by a refrigerant conveying device for cooling.

EXAMPLE Hereinafter, a heating and cooling 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 heating and cooling system according to an embodiment of the present invention. In FIG. 1, 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 cooling pressure reducing device 14 that closes during heating. non-return valve,
17 is a check valve that closes the heating pressure reducing device 15 during cooling;
Reference numeral 18 denotes a first auxiliary heat exchanger, which is 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. 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 such as a pump, which has a reversible characteristic in which the outflow direction of the refrigerant is opposite during cooling and heating. Further, 22 is a user side heat source heat exchanger, which is housed in the heat source side unit) d. 2
3 is a user-side heat exchanger, which is housed in the user-side unit (e) and connected to the heat source-side unit d via connecting piping ff'.

The first auxiliary heat exchanger 19 and the refrigerant amount adjustment tank 20. Refrigerant conveyance device 21. The user-side heat source heat exchanger 22, the user-side heat exchanger 23, and the connecting pipe f are connected in an annular manner to form a user-side refrigerant cycle.

The operation of the heating and cooling device configured as described above will be explained.

During cooling operation, the refrigerant cycle is shown by the solid line in the figure, where it radiates heat, condenses and liquefies, passes through the check valve 16, is depressurized by the cooling expansion valve 14, evaporates in the first auxiliary heat exchanger 18, passes through the four-way valve 12, and is compressed. Circulate to machine 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 gas refrigerant in the user-side refrigerant cycle is cooled and liquefied, and passes through the refrigerant amount adjustment tank 2o. Refrigerant conveyance device 21
The refrigerant is sent to the user-side heat exchanger 23 through the connecting pipe f by this refrigerant conveying device 21, where it is cooled, absorbed and evaporated, gasified, and passed through the connecting pipe f' to the user-side heat source heat exchanger 22. and then circulated 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 check valve 17 is also depressurized by the heating pressure reducing device 15, it is endothermically evaporated by 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 user side heat source heat exchanger 22 The refrigerant is sent to the user-side heat exchanger 23 through the connecting pipe f', heated and liquefied for heat radiation, and sent through the connecting pipe f to the refrigerant conveying device 21, and from the refrigerant amount adjustment tank 20 to the second auxiliary heat exchanger. 1
Cycle to 9.

As described above, according to this embodiment, the heat source side refrigerant cycle and the user side refrigerant cycle are separated, so during cooling operation in the intermediate season or winter, the heat source side refrigerant cycle is stopped, and the user side refrigerant cycle is drive only. In other words, the refrigerant conveying device 21. User side heat exchanger 23. The user-side heat source heat exchanger 22 is operated, the user-side heat exchanger 23 performs endothermic cooling, and the user-side heat source heat exchanger 22 performs radiation cooling.

As described above, according to this embodiment, there is no need to operate the compressor during cooling operation during the intermediate season or winter, so there is no need to worry about damage to the compressor due to liquid compression, and there is no need to worry about damage to the compressor due to liquid compression. Since there is no deterioration, there is no need to worry about operation stoppage due to frost formation on the heat exchanger on the user side.

Furthermore, since the compressor is not operated, power consumption is extremely low and it is economical.

In the embodiment, the user-side heat source heat exchanger is used for cooling operation during the intermediate season or winter, but it may also be used as a user-side heat source heat exchanger for heat recovery during heating. However, a plurality of the user-side heat source heat exchangers may be provided at any position.

Effects of the Invention As described above, the present invention includes a compressor, a heat source side heat exchanger, a pressure reducing device, and a first auxiliary heat exchanger connected in an annular manner. A heat source side refrigerant cycle, a second auxiliary heat exchanger that is formed integrally with the first auxiliary heat exchanger and exchanges heat, a refrigerant conveying device, a user side heat exchanger, and a user side heat source heat exchanger are connected in a ring shape. Since the refrigerant cycle on the user side is separated, there is no need to operate the refrigerant cycle on the heat source side during cooling operation during the intermediate season or winter, in other words, there is no need to operate the compressor, so damage to the compressor due to liquid compression and evaporation pressure Since there is no extreme drop in
There is no need to worry about operation stoppages due to frost formation on the heat exchanger on the user side. Furthermore, since the compressor is not operated, there is an effect of economical cooling operation.

[Brief explanation of drawings]

FIG. 1 is a refrigerant cycle diagram of a heating and cooling system according to an embodiment of the present invention, and FIG. 2 is a diagram of a refrigerant cycle of a conventional heating and cooling system. 13... Heat source side heat exchanger, 18... First auxiliary heat exchanger, 19... Second auxiliary heat exchanger,
21...Refrigerant conveyance device, 22...Using side heat source heat exchanger, 23...Using side heat exchanger. Name of agent: Patent attorney Toshio Nakao and 1 other person13
−・−Heat source! ! I! Exchange ticket lδ...-vJf Simple rib ripe matakoki Fig. 1 Fig. 2 d

Claims (1)

[Claims] A heat source side refrigerant cycle 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, and a second auxiliary heat that is formed integrally with the first auxiliary heat exchanger and exchanges heat. A heating and cooling system comprising a user-side refrigerant cycle formed by connecting an exchanger, a refrigerant transport device, a user-side heat exchanger, and a user-side heat source heat exchanger in an annular manner.