A scroll adaptive back pressure structure, compressor and temperature regulating equipment

Abstract

The invention discloses a scroll self-adaptive back pressure structure, a compressor and a temperature regulating device, comprising a frame; a fixed scroll plate, an exhaust hole is arranged in the middle of the fixed scroll plate; The scrolls are matched, and the frame defines a back pressure cavity on the back side of the movable scroll. The movable scroll teeth in the middle of the movable scroll are provided with back pressure guide holes, and the back pressure guide holes are located in the movable scroll. A first opening is formed on the end face of the spiral tooth, and a back pressure guide hole forms a second opening on the back pressure side of the movable scroll. The back pressure guide hole is connected to or staggered from the exhaust hole during the movement of the movable scroll. , the back pressure guide hole is used to introduce the refrigerant remaining in the discharge hole into the back pressure cavity after the exhaust valve assembly is closed; the one-way valve assembly is arranged in the back pressure guide hole. The axial gas force on the movable scroll is well balanced, and at the same time, the residual high-pressure refrigerant in the exhaust hole of the fixed scroll is effectively used, which reduces the repeated compression phenomenon and effectively improves the scroll compression. machine efficiency.

Description

technical field [0001] The invention is used in the field of compressors, and in particular relates to a scroll self-adaptive back pressure structure, a compressor and a temperature regulating device. Background technique [0002] The scroll compressor is a positive displacement compressor. The compression part is composed of a movable scroll and a fixed scroll. During the compression process, the relative revolution of the movable scroll and the fixed scroll is used to form a continuous change of the closed volume, so as to realize the continuous change of the closed volume. Purpose of compressed gas. Because the closed cavity formed when the movable and fixed scrolls mesh has a certain gas pressure, the movable scroll will bear an axial gas force opposite to the direction of the fixed scroll during compression. Therefore, most of the existing scroll compressor designs adopt a back pressure cavity structure, that is, a closed cavity is formed on the back of the moving plat...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: when the compressor runs from one compression cycle to the next compression cycle, the through hole will also enter the previous compression chamber, because there is a pressure difference between the front and rear compression chambers, so the back pressure chamber The pressure also fluctuates accordingly, and a part of the refrigerant in the back pressure chamber will flow back and forth between the compression chambers due to pressure changes, resulting in repeated compression, which affects the efficiency of the compressor

This method has the following disadvantages: the design of connecting the exhaust high-pressure chamber and the back-pressure chamber will cause the pressure in the back-pressure chamber to be too high, and a pressure relief valve device needs to be installed in the back-pressure chamber. It flows back into the low-pressure chamber, causing repeated compression, which affects the efficiency of the compressor, and the path between the high-pressure chamber and the back-pressure chamber is too long, requiring many parts to be slotted to cooperate with each other, resulting in high cost and high risk of leakage

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