Capacity changing mechanism for scroll compressor and scroll compressor

Abstract

The invention relates to a capacity changing mechanism for a scroll compressor and the related scroll compressor. According to one aspect of the invention, the scroll compressor comprises a compressing mechanism, wherein the compressing mechanism comprises a fixed scroll member and a movable scroll member, and a series of compressing cavities are limited by the compressing mechanism; the capacity changing mechanism comprises a draining channel, a plurality of blocking members and an actuation device, wherein the draining channel is suitable for communicating a medium-pressure compressing cavity in the compressing cavity with a low-pressure area, the blocking members are suitable for alternatively opening or closing the draining channel, the actuation device comprises an execution member, and the blocking members are connected to the execution member so as to alternatively open or close the draining channel along with the motion of the execution member; and the blocking members are connected with the single executing member so as to synchronously move along with the motion of the single execution member. Through the scroll compressor and the capacity changing mechanism, motion synchronization of the blocking members can be reliably achieved.

Description

technical field [0001] The present invention relates to a displacement mechanism for a scroll compressor and related scroll compressors, more particularly, to a displacement mechanism for a scroll compressor that improves the synchronization of the action of the blocking member of the displacement mechanism. Variable displacement mechanism and associated scroll compressor. Background technique [0002] As the requirements for high efficiency and energy saving are getting higher and higher, air conditioners are the main energy-consuming products, and high efficiency, energy saving and comfort are the goals that are constantly pursued. Scroll compressors have been gradually developing toward larger horsepower and higher energy efficiency. The capacity-adjustable (variable capacity) scroll compressors can achieve high energy efficiency at low loads and have the characteristics of high reliability and low vibration. It is more and more widely used in capacity-adjustable air-con...

AI Technical Summary

Problems solved by technology

Therefore, on the one hand, the cross-sectional area of ​​the discharge return passage is limited due to the structure of the fixed scroll, so resistance to the discharge of the working fluid is generated, resulting in increased power consumption; on the other hand, the discharge return passage requires Radial extension and small diameter in the fixed scroll, thus causing processing difficulties

[0007] In addition, in the conventional scroll compressor with adjustable capacity, there are situations such as low precision of motion guidance of the variable displacement piston or plunger, collision between the variable displacement piston or plunger and the end face of the variable displacement hole, etc., which affect the displacement of the variable displacement piston or plunger. In addition, when increasing the matching gap between the variable volume piston or plunger and the variable volume hole in order to improve the operational reliability, it will cause leakage of the working fluid

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