Rotary compressor parallel connection system

Abstract

The invention relates to a rotary compressor parallel connection system which comprises a plurality of compressors, an oil separator, oil balancing pipes and an oil return pipe. The compressors are connected with one another in parallel, and exhaust pipes of the multiple compressors are connected with the same oil separator by high-pressure pipes; oil inlets of the oil balancing pipes are connected with shells of the compressors and are positioned in locations above the lowermost oil level of the compressors, and oil outlets of the oil balancing pipes are connected with the exhaust pipes or the high-pressure pipe; the oil separator is connected with gas suction openings of gas and liquid separators of the compressors by the oil return pipe. The rotary compressor parallel connection system has the advantages that the oil balancing pipes are mounted on the shells of the compressors, surplus refrigerant oil in the compressors can be drained and can be taken back into the shells of the various compressors by the oil return pipe, accordingly, the oil can be automatically balanced, and the rotary compressor parallel connection system is simple in structure and low in cost; the oil inlets of the oil balancing pipes are arranged above the upper end surfaces of cylinders of the compressors, and accordingly oil starvation can be effectively prevented when the compressors run at high speeds.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a rotor compressor parallel system. Background technique [0002] In the refrigeration system, when the compressor is working, a small amount of refrigerated oil (also known as lubricating oil) must be continuously pressed out from the cylinder together with the refrigerant, and enter the pipeline, condenser and evaporator of the refrigeration system. When the refrigerating oil cannot be continuously returned to the compressor, the oil level of the compressor will drop, until the refrigerating oil is exhausted, and the compressor will burn due to lack of oil. Therefore, it is one of the most important issues in the design of the refrigeration system to ensure that the refrigeration oil is continuously returned to the compressor. [0003] With the popularization of energy-saving awareness, multi-connected air-conditioning systems (also known as variable refrigerant flow ...

AI Technical Summary

Problems solved by technology

Too much refrigeration oil on the compressor will cause excessive load on the rotor and increase the input power; less oil will cause abnormal wear of the movement and damage the function

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