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Pressure control valve

A pressure control and valve core technology, applied in the field of pressure control valves, can solve the problems of reduced cooling capacity, compressor shutdown, compressor capacity reduction, etc., and achieves the effect of reducing the passage area and achieving good control reliability.

Active Publication Date: 2011-10-12
ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, in a supercritical carbon dioxide refrigeration system, the pressure characteristics of the high-pressure side have a great influence on the refrigeration efficiency of the system; on the other hand, the pressure on the high-pressure side can reach 70-150bar, which is 7-10 times that of common refrigeration devices. The increase in pressure will reduce the capacity of the compressor, which will reduce the cooling capacity, further increase the pressure to an abnormal level, and even cause the compressor to stop.

Method used

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Embodiment 1

[0051] figure 2 It is a structural schematic diagram of the pressure control valve of the preferred solution of the present invention. Such as figure 2 As shown, the pressure control valve 40 includes: a valve body 1; a high-pressure chamber 51 and a low-pressure chamber 61 arranged in the valve body 1, the high-pressure chamber 51 and the low-pressure chamber 61 are connected by a throttling passage 7, and the high-pressure chamber The high-pressure port 5 of the chamber 51 is connected to the outlet side of the cooler 20 through the heat exchanger 30, the low-pressure port 6 of the low-pressure chamber 61 is connected to the inlet side of the evaporator 50, and a sealing member is provided between the high-pressure chamber 51 and the inner chamber 11; The inner chamber 11 of the valve body 1 is provided with a valve core 2; the valve port 71 is located on the throttling passage 7 and opens to the high-pressure chamber 51; when the valve core 2 moves back and forth relativ...

Embodiment 2

[0064] This embodiment combines the attached Figure 5 Preferred embodiments of the pressure control valve are disclosed. Such as Figure 5 Schematic diagram of the structure of the pressure control valve shown.

[0065] A bypass through hole 8' is provided between the low-pressure chamber 61 and the inner cavity 11, and the pressure in the low-pressure chamber 61 is introduced into the inner cavity 11 to act on the valve core 2. The axis of the bypass through hole 8' is in line with the valve core. The axes of the cores 2 intersect with an angle R between them. The difference from the pressure control valve shown in Embodiment 1 is that in Embodiment 1, one end of the bypass through hole 8 opens to the inner cavity 11, and its opening faces the valve core 2 no matter where the valve core 2 moves, while In this embodiment, when the valve port 71 is fully opened, the opening of the bypass hole 8 to the inner cavity 11 is higher than the end surface 23 of the valve core 2, no...

Embodiment 3

[0069] This embodiment combines the attached Figure 7 Preferred embodiments of the pressure control valve are disclosed. Such as Figure 7 Schematic diagram of the structure of the pressure control valve shown.

[0070] A bypass through hole 8" is provided between the low-pressure chamber 61 and the inner cavity 11, so that the pressure in the low-pressure chamber 61 is the same as that of the inner cavity 11. The structure of the pressure control valve described in this embodiment is the same as that described above. The main difference of the embodiment is that the axis of the bypass hole 8" is parallel to the axis of the spool, and the distance between the axis of the bypass hole 8" and the axis of the spool 2 is greater than the maximum radius of the spool 2 , Correspondingly, the cross-sectional size of the inner chamber 11 is also increased compared with the above two embodiments. Other structures of the pressure control valve are basically similar to the previous emb...

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Abstract

The invention discloses a pressure control valve, which comprises a valve body (1), a high-pressure cavity (51), a low-pressure cavity (61) and a valve element (2), wherein the high-pressure cavity (51) and the low-pressure cavity (61) are arranged in the valve body (1) and are communicated by a throttling passage (7); the valve element (2) is arranged in an inner cavity (11) of the valve body (1) and can reciprocally move relative to an opening (71) which is arranged on the throttling passage (7) and faces the high-pressure cavity (51) to control the opening degree of a valve opening (71); and the high-pressure cavity (51) and the inner cavity (11) are mutually isolated through sealing and a connecting passage is arranged between the low-pressure cavity (61) and the inner cavity (11). The pressure control valve disclosed by the invention can control the change of the pressure difference between a high-pressure side and a low-pressure side of the system so as to directly control the pressure of a cooling agent of the high-pressure side.

Description

technical field [0001] The invention relates to the technical field of refrigeration cycles, in particular to a pressure control valve. Background technique [0002] At present, human beings are facing more and more serious environmental problems, among which the destruction of the ozone layer and the greenhouse effect are increasingly concerned by the whole world. The chlorofluorocarbon (commonly known as Freon) refrigerant (refrigerant) used in the traditional refrigeration cycle system is a synthetic compound, which is not easy to be decomposed when it volatilizes into the atmosphere, but it can decompose ozone molecules and cause serious damage to the ozone layer. Alternative hydrofluorocarbon refrigerants do not destroy the ozone layer, but their greenhouse effect is obvious. In the future, although human beings can work hard to synthesize better refrigerants, in the long run, substances that do not exist on the earth will be produced and used in large quantities. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/30F16K1/38F25B41/00
Inventor 尹斌章剑敏祝颖安
Owner ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS CO LTD
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