Air conditioner system and compressor oil return structure thereof

Abstract

The invention provides a compressor oil return structure. The compressor oil return structure comprises a compressor, an oil separator, a main oil return assembly and an auxiliary oil return assembly; the main oil return assembly comprise a main oil return pipeline, a main valve and a first capillary pipe, and the main valve and the first capillary pipe are connected in series and are arranged in the main oil return pipeline; the two ends of the auxiliary oil return assembly are connected with the two ends of the main oil return pipe correspondingly; and the auxiliary oil return assembly, the main valve and the first capillary pipe are arranged in a parallel connection manner. The auxiliary oil return assembly is additionally arranged on the main oil return pipeline; lubricating oil of an air conditioner system under an ultralow-temperature work condition can flow back into the compressor through the auxiliary oil return assembly, the problem that the lubricating oil blocks the capillary pipe under the ultralow-temperature work condition and consequently oil return of the compressor is not sufficient is effectively solved, the problem that an air conditioning unit cannot work under the ultralow-temperature work condition is avoided, it is guaranteed that the lubricating oil in the compressor is sufficient, and the running reliability of the compressor is improved. The invention further provides the air conditioner system.

Description

technical field [0001] The invention relates to the technical field of air-conditioning equipment, in particular to an air-conditioning system and an oil return structure for a compressor thereof. Background technique [0002] In the current commercial air-conditioning system, the compressor oil return capacity of multi-connected air-conditioning units is limited by the ultra-low ambient temperature. In ultra-low temperature environment, the concentration of compressor lubricating oil will increase, and the state of lubricating oil will change from thin to thick. In addition, the diameter of the oil return capillary is limited. The pressure difference generated is not enough to push the lubricating oil in the oil return capillary, which will lead to blockage of the oil return pipeline, affect the reliability of the compressor operation, and then affect the normal operation of the multi-connected air conditioner unit run. Contents of the invention [0003] Based on this, ...

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Problems solved by technology

[0003] Based on this, it is necessary to solve the problem that the lubricating oil will block the capillary and cause insufficient oil return when the air conditioning system is started under ultra-low temperature conditions, and provide an air conditioning system that can ensure sufficient oil return under ultra-low temperature conditions and improve the operating reliability of the compressor. The oil return structure of the compressor, and also provide an air conditioning system with the above oil return structure of the compressor

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