Parallel system of multiple high-pressure cavity compressors

Abstract

The invention discloses a parallel system of multiple high-pressure cavity compressors. Due to the design of an inverse U-shaped pipe, an overflow pipe and an oblique main pipe, the refrigerating machine oil reflowing from an oil separator is prevented from flowing back to compressors when all the compressors stop running, and more oil reflowing from the oil separator can be stored in a vapor-liquid separator through the overflow pipe so as to prevent liquid blockage; when the compressors run in low loads and the coolant flow rate of an air suction pipe is low, the oil can be prevented from flowing back to the vapor-liquid separator; after a certain oil quantity is accumulated in the oblique main pipe, the oil is directly recycled to the compressors, so that the oil supply of the compressors is ensured; and the system can avoid liquid compression or liquid blockage of the compressors in each state of the compressors, so that the reliability of the compressor is improved.

Description

technical field [0001] The invention belongs to an air-conditioning and refrigeration system, in particular to a pipeline system in which a plurality of high-pressure cavity compressors are connected in parallel. Background technique [0002] The parallel system of multiple high-pressure chamber compressors shares the same gas-liquid separator, and the suction pipe of the compressor directly enters the compression chamber of the compressor. If a large amount of refrigeration oil in the system directly enters the compression chamber of the compressor through the oil separator, it will cause Cause liquid compression, especially when the system using the straight-through oil separator is shut down, the inclined design of the pipeline in the prior art will easily cause the refrigerator oil to flow back to other containers, which is not conducive to the oil return control of the system. Contents of the invention [0003] The parallel pipeline system of multiple high-pressure ca...

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Problems solved by technology

[0002] The parallel system of multiple high-pressure chamber compressors shares the same gas-liquid separator, and the suction pipe of the compressor directly enters the compression chamber of the compressor. If a large amount of refrigeration oil in the system directly enters the compression chamber of the compressor through the oil separator, it will cause Cause liquid compression, especially when the system using straight-through oil separator is shut down, the inclined design of the pipeline in the prior art will easily cause the refrigerator oil to flow back to other containers, which is not conducive to the oil return control of the system

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