Low-back-pressure rotary compressor, corresponding oil return pressure drop control method and air conditioner

Abstract

The invention provides a low-back-pressure rotary compressor, a corresponding oil return pressure drop control method and an air conditioner. The low-back-pressure rotary compressor comprises a shell,a pump body assembly located in the shell and an oil-liquid separator. The oil-liquid separator is connected with an exhaust port of the pump body assembly. An oil return lubricating pipeline is alsoincluded and is located between an oil collecting part of the oil-liquid separator and at least one end surface of a roller of the pump body assembly so that lubricating oil in the oil collecting part lubricates at least one end surface of the roller. By using the low-back-pressure rotary compressor, the corresponding oil return pressure drop control method and the air conditioner, the lubricating oil in the oil-liquid separator is introduced into an end surface of the roller in the compressor pump body assembly, a defect that the end surface of the roller in the low-back-pressure rotary compressor cannot be effectively lubricated is effectively overcome, then sealing performance of the pump body assembly is guaranteed, and a refrigerant leakage amount of the pump body assembly and abrasion of the end surface of the roller are reduced.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a low back pressure rotary compressor, a corresponding oil return pressure drop control method, and an air conditioner. Background technique [0002] In recent years, rotary compressors have been widely used, especially in air conditioners, water heaters, refrigeration equipment and other fields. Compared with the high pressure (high back pressure) structure in the shell, there is also a low back pressure rotary compressor with a low pressure structure in the shell. The low back pressure rotary compressor reduces the pressure requirements of the shell, which can significantly reduce the weight and cost of the compressor, and can greatly reduce the amount of refrigerant charged, reducing the amount of refrigerant packaged in the system, which not only improves the safety of the equipment Sex, and reduce the manufacturing cost of the equipment. [0003] For t...

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to provide a low back pressure rotary compressor, a corresponding oil return pressure drop control method, an air conditioner, and a method of introducing the lubricating oil in the oil-liquid separator into the pump body assembly of the compressor. The end face of the roller effectively overcomes the problem that the end face of the roller in the low back pressure rotary compressor cannot be lubricated effectively, thereby ensuring the sealing of the pump body components, reducing the leakage of refrigerant of the pump body components and the wear of the end face of the rollers

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