Three-stage scroll rotor compressor

Abstract

The invention provides a three-stage scroll rotor compressor which comprises a high-low pressure isolation plate, a sealing shell, a motor mechanism, a driving crankshaft, an upper fixed scroll, a movable scroll, a lower fixed scroll and a rolling rotor. The scroll compressor and the rotor compressor are combined, three-stage compression of inlet air is achieved, and under the condition that the size of the whole compressor is not increased, the high internal pressure ratio compression can be improved, and the rotor type compressor has no internal pressure ratio problem, so that the total internal pressure ratio of the compressor can be self-adjusted in a large range, the reliability of the whole compressor is high, the operation range of the compressor is expanded, and the efficiency of the compressor is improved; the axial force of the movable scroll can be greatly reduced, and the whole machine load of the compressor is reduced.

Description

technical field [0001] The invention relates to the technical field of refrigeration compressors, in particular to a three-stage scroll compressor. Background technique [0002] The compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas. It is the heart of the refrigeration system. It sucks low-temperature and low-pressure refrigerant gas from the suction pipe, compresses it, and discharges it to the exhaust pipe. The high-temperature and high-pressure refrigerant gas provides power for the refrigeration cycle. The actual responsibility of the compressor is to increase the pressure and increase the suction pressure state to the discharge pressure state through compression. When evaluating the compression capacity of the compressor, the internal pressure ratio It is an important indicator for evaluating the energy efficiency of compressors. In order to increase the internal pressure ratio, some compressors in the prior art adopt two sets of com...

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Problems solved by technology

[0003] The publication number is CN110594152B, which provides a vertical two-stage scroll compressor, which mainly adopts two sets of scroll mechanisms and supporting structures, adopts staged compression, and shares the load of the compressor. Compared with the traditional single set of scroll compression mechanism , greatly increased the internal pressure ratio of the compressor, and for the non-adjustable problem of the internal pressure ratio of the scroll compression mechanism, a pressure ratio regulating valve was adopted to deal with it, but this solution still has the following deficiencies: the use of two Stage compression can perfectly cope with a relatively small internal pressure, but when it needs to continue to increase, it is somewhat unable to achieve a large internal pressure ratio, and because the compressor uses scroll compression, the internal pressure ratio The non-adjustable problem is solved by using a pressure ratio regulating valve. This method is limited by the size of the valve hole, the range of internal pressure ratio adjustment is small, and the efficiency is low.

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