JPS61190257A - Heat pump type refrigerator - 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 heat pump type refrigeration system using a non-azeotropic mixed refrigerant.

BACKGROUND ART Page 2 In recent years, heat pump refrigeration systems that use non-azeotropic mixed refrigerants and whose capacity can be varied have been developed.

An example of the conventional heat pump type refrigeration system mentioned above will be described below with reference to the drawings.

FIG. 2 shows a circuit diagram of a conventional heat pump type refrigeration system using a non-azeotropic mixed refrigerant.

In FIG. 2, 1 is a compressor, 2 is a four-way valve, 3 is an outdoor heat exchanger, 4 or 5 pressure reducing devices, and 6 is an indoor heat exchanger. Further, a conduit 7 branches between the 4 and 5 pressure reducing devices, and is connected to a first refrigerant container 8 .

This first refrigerant container 8 includes a pressure reducing device 5 and an indoor heat exchanger 6.
It surrounds the piping that connects the A second refrigerant container 9 surrounds a pipe connecting the outdoor heat exchanger 3 and the pressure reducing device 4, and is connected to the conduit 7 via an on-off regulating valve 10. This refrigeration cycle uses a non-azeotropic mixed refrigerant.

The operation of the heat pump type refrigeration system configured as described above will be explained below.

First, during cooling operation, the refrigerant flows in the direction of the solid arrow shown in the figure. Here, the on-off regulating valve 10 is closed, and the conduit 7
The diverted refrigerant reaches the first refrigerant container 8, but since the piping connecting the pressure reducing device 5 surrounded by the first refrigerant container 8 and the indoor heat exchanger 6 is at a low temperature during cooling operation, the first refrigerant reaches the first refrigerant container 8.
The refrigerant container 8 is cooled, high boiling point components are stored in liquid form inside the container, and low boiling point components flow through the refrigeration cycle.

On the other hand, during heating operation in a state where the on-off adjustment valve 10 is closed, the refrigerant flows in the direction of the illustrated broken line arrow. Here, since the first refrigerant container 8 is heated by the high-temperature refrigerant liquefied in the indoor heat exchanger 6, the refrigerant circulates through the refrigeration cycle without being liquefied and stored in the first refrigerant container 8. In this case, a mixed refrigerant flows as the refrigerant in the refrigeration cycle, and the refrigeration cycle capacity during heating is improved compared to the refrigeration cycle during cooling.

In addition, during heating operation, if the opening/closing adjustment valve 10 is operated when there is surplus heating capacity, the high boiling point components are guided to the second refrigerant container 9 and stored, thereby reducing the heating capacity (for example, Publication No. 57-31056).

Problems to be Solved by the Invention However, with the above configuration, during cooling operation,
The problem was that the refrigeration cycle capacity could not be controlled.

In view of the above problems, the present invention provides a heat pump type refrigeration system which is equipped with a refrigerant mixing ratio variable device and whose capacity can be easily controlled not only during heating operation but also during cooling operation.

Means for Solving the Problems In order to solve the above problems, the heat pump type refrigeration system of the present invention uses a non-azeotropic mixed refrigerant and includes a compressor, a four-way valve, an outdoor heat exchanger, a plurality of pressure reducing devices, A refrigeration cycle is constructed by sequentially connecting indoor heat exchangers, a circuit having two check valves is connected in parallel with the plurality of pressure reducing devices, and a rectification column and a first circuit for storing high boiling point components are connected in parallel. a refrigerant container, a first flow rate regulating valve connected to the first refrigerant container, a second refrigerant container storing a low boiling point component, and a second flow rate connected to the second refrigerant container. An inlet of a variable refrigerant mixing ratio device comprising a regulating valve is connected between the plurality of pressure reducing devices, and an outlet of the variable refrigerant mixing ratio device is connected between the two check valves.

Effect The present invention has the above-described configuration, and by separating the refrigerant components of the non-azeotropic mixed refrigerant and changing the refrigerant mixing ratio,
The capacity of the refrigeration system can be easily controlled not only during heating operation but also during cooling operation.

EXAMPLE Hereinafter, a heat pump type refrigeration system according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a circuit diagram of the present invention. A compressor 11, a four-way valve 12, an outdoor heat exchanger 131, a plurality of pressure reducing devices 14, 15 and an indoor heat exchanger 16 are connected in series. In addition, a plurality of pressure reducing devices 14. .

15 and in parallel with the check valve 17. A circuit with I8 is connected. Furthermore, a rectification column 19, a first refrigerant container 20 for storing high boiling point components, and a first flow rate regulating valve 21 connected to the first refrigerant chamber 6-pager 20 for storing low boiling point components. second refrigerant container 22; second refrigerant container 22
The inlet of the refrigerant mixing ratio variable device 25 consisting of the second flow rate regulating valve 23 and the pressure reducing device 24 connected to the refrigerant mixing ratio variable device 25 is connected between the plurality of pressure reducing devices 14.15.
The outlet of is connected between two check valves 17,18. The refrigerant used in the refrigeration cycle of the present invention is a non-azeotropic mixed refrigerant that is a mixture of a plurality of refrigerants having different properties and capabilities.

During cooling operation, refrigerant flows in the direction of the solid arrow. That is,
The refrigerant that has exited the compressor 11 passes through the four-way valve 12, flows into the outdoor heat exchanger 13, radiates heat, and liquefies. Refrigerant check valve 1
7, it flows to the pressure reducing device 14. Here, the refrigerant becomes two layers of gas and liquid, and some of the refrigerant is transferred to the refrigerant mixing ratio variable device 25.
flows into.

On the other hand, the remaining refrigerant flows into the pressure reducing device 15. cold
The chilled water that has flowed into the single-component mixing ratio variable device 25 is first separated into high-boiling point components and low-boiling point components in the rectification column 19, and the high-boiling point components are stored in the first refrigerant container 20 as a liquid refrigerant. Ru. ! , and other low boiling point components are stored in the second refrigerant container 22 as a liquid refrigerant. And the first flow rate regulating valve 2
1. The mixture ratio of the refrigerant is changed by fully controlling the second flow rate regulating valve 23. The refrigerant is then depressurized by the decompression device 24, passes through the check valve 18, joins with the refrigerant that has flowed through the depressurization device 15, flows into the indoor heat exchanger 16, absorbs indoor heat, vaporizes, and The air is sucked into the compressor 11 through the valve 12.

Next, during heating operation, the refrigerant flows in the direction of the dashed arrow. That is, it passes through the compressor 11 and the four-way valve 12, radiates heat in the indoor heat exchanger 16, and is liquefied. Thereafter, after passing through the pressure reducing device 15 and becoming two layers of gas and liquid, some of the refrigerant flows to the refrigerant mixture ratio variable device 25, where the mixture ratio is controlled and flows through the check valve 17.

The remaining refrigerant passes through the pressure reducing device 14, merges with the refrigerant flowing from the refrigerant mixture ratio variable device 25, absorbs heat in the outdoor heat exchanger 13, vaporizes, and returns to the compressor 11 through the four-way valve 12.

As described above, according to this embodiment, by providing the variable refrigerant mixing ratio device 25, the first variable refrigerant mixing ratio device 25 is adjusted according to the load not only during heating operation but also during cooling operation. By controlling the flow rate adjustment valve 21 and the second flow rate adjustment valve 23 and changing the mixing ratio of the refrigerant circulating in the refrigeration cycle, the capacity of the refrigeration system can be easily controlled.

Effects of the Invention As described above, the present invention uses a non-azeotropic mixed refrigerant in a heat pump type refrigeration system, connects a circuit having two check valves in parallel with a plurality of pressure reducing devices of the refrigeration cycle, and furthermore, A column, a first refrigerant container for storing high boiling point components, a first flow rate regulating valve, a second refrigerant container for storing low boiling point components, and a second refrigerant container for storing high boiling point components.
The inlet of the refrigerant mixing ratio variable device consisting of the flow rate adjustment valve is
By connecting between the plurality of pressure reducing devices and connecting the outlet of the variable refrigerant mixing ratio device described in WI between the two check valves, the load can be controlled not only during heating operation but also during cooling operation. Accordingly, the first flow rate regulating valve and the second flow rate regulating valve can be controlled to change the refrigerant mixing ratio to easily control the capacity of the refrigeration system.

[Brief explanation of the drawing]

FIG. 1 is a configuration circuit diagram of a heat pump type refrigeration system according to an embodiment of the present invention, and FIG. 2 is a configuration circuit diagram of a conventional heat pump type refrigeration system. 11...Compressor, 12...Four-way valve, 13
...Outdoor heat exchanger, 14.15...Multiple pressure reducing devices, 16...Indoor heat exchanger, 17.18...
... Check valve, 19 ... Rectification column, 20 ...
・First refrigerant container, 21...first flow rate adjustment valve, 2
2...Second refrigerant container, 23...Second
Flow rate adjustment valve, 25...Refrigerant mixing ratio variable device.

Claims (1)

[Claims] Using a non-azeotropic mixed refrigerant, a refrigeration cycle is constructed by sequentially connecting a compressor, a four-way valve, an outdoor heat exchanger, a plurality of pressure reducing devices, and an indoor heat exchanger, and two pressure reducing devices are connected in parallel with the plurality of pressure reducing devices. A rectification column, a first refrigerant container for storing high boiling point components, a first flow rate adjustment valve, a second refrigerant container for storing low boiling point components, and a second refrigerant container for storing low boiling point components are connected. A heat pump type refrigeration system, wherein an inlet of a refrigerant mixture ratio variable device comprising a flow rate adjustment valve is connected between the plurality of pressure reducing devices, and an outlet of the refrigerant mixture ratio variable device is connected between the two check valves. .