Two-stage scroll compressor

Abstract

The invention relates to the technical field of compression, in particular to a two-stage scroll compressor. The two-stage scroll compressor comprises a main body, a first scroll plate assembly, a second scroll plate assembly, a heat exchanger and a driving unit, the body is provided with an inner cavity and a diversion channel. The first vortex plate assembly, the second vortex plate assembly and the driving unit are all contained in the inner cavity, and the driving unit is in transmission connection with the first vortex plate assembly and the second vortex plate assembly. The two ends of the flow guide channel are communicated with a refrigerant outlet of the first vortex plate assembly and a refrigerant inlet of the second vortex plate assembly respectively. The heat exchanger is connected with the main body, is positioned outside the main body and is used for exchanging heat with the refrigerant in the flow guide channel; the driving unit is in transmission connection with the first vortex plate assembly and the second vortex plate assembly. According to the two-stage scroll compressor, two-stage compression is adopted, it can be guaranteed that the total pressure ratio is kept unchanged, gas force borne by the orbiting scroll can be reduced by reducing the single-stage pressure ratio, then the overturning moment is reduced, and vibration and noise of the compressor are reduced.

Description

technical field [0001] The present invention relates to the technical field of compression, in particular to a two-stage scroll compressor. Background technique [0002] The electric scroll compressor is a typical positive displacement compressor. Compared with other types of compressors, it has the advantages of simple structure, small size and light weight. It is the core equipment in the refrigeration system and is now widely used in the automotive air-conditioning industry. . The main part of the scroll compressor is the scroll assembly, and the scroll assembly is composed of a movable scroll and a stationary scroll. The movable scroll is eccentrically arranged and meshes with the stationary scroll. When the movable scroll is driven by the motor shaft and restricted by the anti-rotation mechanism, the closed volume formed by the movable scroll and the stationary scroll also changes while moving. Its volume, so as to complete the process of suction, compression and exha...

AI Technical Summary

Problems solved by technology

First of all, the low temperature that single-stage compressors can obtain under normal temperature cooling conditions is limited. Secondly, single-stage compressors are not suitable for high-pressure ratio conditions. If the pressure ratio is too high, it will result in reduced volumetric efficiency, increased power consumption, and exhaust Excessive temperature and problems such as greater vibration and noise

Secondly, under heating conditions, when the ambient temperature is low, the lubricating oil in the compressor will solidify, making it impossible or difficult to start the compressor

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