Pressure control valve

A pressure control and spool technology, applied in the field of pressure control valves, can solve the problems of compressor shutdown, cooling capacity reduction, compressor capacity reduction, etc., and achieve the effect of good reliability and shock avoidance

Active Publication Date: 2009-09-30
ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS
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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 7

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0055] Example one

[0056] This embodiment combines Figure 2 ~ Figure 4 A specific implementation of the pressure control valve is described.

[0057] figure 2 It is a schematic diagram of the structure of the pressure control valve described in the first embodiment. Such as figure 2 As shown, the pressure control valve includes: a valve body 1; a low-pressure chamber 61, an inner cavity 11 of the valve body 1, and a high-pressure chamber 51 arranged in sequence; the high-pressure chamber 51 and the low-pressure chamber 61 are located on two sides of the valve body 1. End, the inner cavity 11 is located between them, the inner cavity 11 and the high-pressure chamber 51 are provided with a throttle passage 7 between the throttle passage 7 and the throttle passage 7 has a valve port 71 facing the inner cavity 11; The high-pressure port 5 is connected to the outlet side of the cooler 20 through the heat exchanger 30, and the low-pressure port 6 of the low-pressure chamber 61 is c...

Example Embodiment

[0069] Example two

[0070] The following is attached Figure 5 with Figure 6 A preferred embodiment of the present invention is disclosed. Figure 5 It is a schematic diagram of the structure of the pressure control valve in this embodiment, Figure 6 Yes Figure 5 Side view along the A direction.

[0071] Such as Figure 5 As shown, similar to the first embodiment, the pressure control valve in this embodiment includes: a valve body 1; a low-pressure chamber 61, an inner cavity 11 of the valve body 1 and a high-pressure chamber 51 arranged in sequence, the inner cavity 11 and The low-pressure chamber 61 is connected by a passage 41, and the inner chamber 11 and the high-pressure chamber 51 are connected by a throttle passage 7; the valve core 2 in the inner chamber 11 can be relative to the throttle passage 7 The valve port 71 toward the inner cavity 11 moves back and forth to make the valve port 71 open or close, and the degree of opening and closing of the valve core varies w...

Example Embodiment

[0077] Example three

[0078] This embodiment combines with Figure 7 Another embodiment of the pressure control valve according to the present invention is disclosed.

[0079] Figure 7 It is a schematic diagram of the structure of the pressure control valve in this embodiment, such as Figure 7 As shown, the difference from the pressure control valve in the first and second embodiments is that, in this embodiment, the axes of the high pressure chamber 51 and the low pressure chamber 61 are perpendicular to each other, and the axis of the normally open throttle passage 8" It intersects with the axis of the valve core 2 and the included angle is R. The other structures are similar to those in the first embodiment and will not be repeated here.

[0080] In the normal state, the refrigerant pressure F1 in the inner cavity 11 of the valve core 2 and the thrust F2 of the spring 3 close the throttle passage 7, and the refrigerant pressure in the high pressure chamber 51" exerts a forc...

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Abstract

The invention discloses a pressure control valve, which comprises a valve body, a low-pressure cavity, an inner cavity of the valve, a high-pressure cavity, a throttling passage and a valve element, wherein the low-pressure cavity, the inner cavity of the valve and the high-pressure cavity are arranged sequentially, and the inner cavity is communicated with the low-pressure cavity; the throttling passage is arranged between the inner cavity and the high-pressure cavity and has a valve opening facing the inner cavity; the valve element is arranged in the inner cavity, an end face, facing the throttling passage, of the valve element is provided with a sealing part corresponding to the throttling passage, the sealing part is matched with the valve opening and the valve element can reciprocally move relative to the valve opening, facing the inner cavity, of the throttling passage to open and close the throttling passage; and a normally open throttling passage is arranged between the inner cavity and the high-pressure cavity. In a supercritical carbon dioxide circulating system, the pressure control valve can be used to directly control the pressure of a cooling agent on a high pressure side by controlling the pressure difference between the high pressure side and a lower pressure side.

Description

technical field [0001] The invention relates to the technical field of refrigeration, 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 ecolog...

Claims

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Application Information

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IPC IPC(8): F16K17/30F16K1/38F25B41/00
Inventor 尹斌祝颖安
Owner ZHEJIANG SANHUA AUTOMOTIVE COMPONENTS
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