Valve

By designing a linked valve core structure, the problem of slow adjustment of the back pressure control valve opening in the scroll compressor was solved, realizing rapid and stable adjustment of the back pressure fluid pressure and simplifying the equipment structure, thereby improving the compressor's operating efficiency and stability.

CN122003558APending Publication Date: 2026-05-08EAGLE INDS
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Patent Information

Application Number
CN202480065213.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-10-27
Filing Date
2024-10-22
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

In existing scroll compressors, the valve core of the back pressure control valve does not adjust its opening quickly enough when the back pressure is insufficient or excessive, resulting in a long back pressure chamber pressure adjustment time and affecting compressor efficiency.

Method used

Design a valve core structure with a first passage and a second passage. The opening degrees of the first passage and the second passage are linked together. The movement of the valve core controls the change of back pressure fluid pressure, simplifies the equipment structure, and ensures smooth movement of the valve core through mathematical formula 1.

Benefits of technology

It enables rapid and stable adjustment of back pressure fluid pressure, simplifies equipment structure, improves compressor operating efficiency and stability, prevents fluid from flowing directly into low-pressure space, and reduces energy loss.

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Abstract

Provided is a valve capable of smoothly changing the pressure of a back pressure fluid. A valve (V1) is provided with: a housing (60) having a high-pressure space (S2) into which a high-pressure fluid (Pd) flows, back-pressure spaces (S3, S3 ') into which a back-pressure fluid (Pb) flows, and a low-pressure space (S1) into which a low-pressure fluid (Ps) flows; and a valve body (61) disposed in the housing (60) so as to be capable of relative movement. The housing (60) has a first passage (73) provided between the high-pressure space (S2) and the back-pressure space (S3) and a second passage (78) provided between the back-pressure space (S3 ') and the low-pressure space (S1), and the valve body (61) has a first valve body part (72) for controlling the opening degree of the first passage (73) and a second valve body part (77) for controlling the opening degree of the second passage (78). The first valve body part (72) and the second valve body part (77) are linked in such a manner that the respective movement directions are opposite in the opening direction and the closing direction.
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