Air conditioner and oil return control method thereof

Abstract

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner and an oil return control method thereof. The invention aims to solve the problem that the oil return method of the existing air conditioner causes the exhaust temperature of the compressor to be too high. The air conditioner of the present invention includes a compressor, a heat exchanger and an oil separator. A first oil return branch and a second oil return branch are arranged in parallel between the air inlet of the compressor and the oil outlet of the oil separator. The first oil return branch directly connects the air inlet of the compressor with the oil outlet of the oil separator, and the second oil return branch flows through the vicinity of the heat exchanger and then connects the air inlet of the compressor with the oil The oil outlet of the separator is connected to each other; the oil return control method of the present invention includes: obtaining the outdoor ambient temperature; and selectively connecting the first oil return branch or the second oil return branch according to the outdoor ambient temperature, so as to adapt The return temperature of the lubricating oil can be changed so that the return temperature of the lubricating oil can always match the discharge temperature required by the compressor.

Description

technical field [0001] The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner and an oil return control method thereof. Background technique [0002] With the continuous improvement of people's living standards, people have also put forward higher and higher requirements for the living environment. In order to maintain a comfortable ambient temperature, air conditioners have become an essential device in people's lives. Generally, an air conditioner includes an indoor unit, an outdoor unit, and a circulation loop for connecting the indoor unit and the outdoor unit. The refrigerant in the air conditioner continuously exchanges heat between the outdoor unit and the indoor unit through the circulation loop, thereby achieving the effect of changing the room temperature. . At the same time, the refrigerant needs the auxiliary function of the compressor in the process of gas-liquid change, and some existing compressors m...

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Problems solved by technology

[0004] In order to solve the above problems in the prior art, that is, in order to solve the problem that the oil return method of the existing air conditioner will cause the exhaust temperature of the compressor to be too high, the present invention provides an air conditioner, which includes an indoor unit , an outdoor unit and a main circulation circuit arranged between the indoor unit and the outdoor unit, the outdoor unit includes a compressor, a heat exchanger and an oil separator arranged in the main circulation circuit, the compressor A first oil return branch and a second oil return branch are arranged in parallel between the air inlet of the engine and the oil outlet of the oil separator, wherein the first oil return branch directly connects the The air inlet of the compressor is connected with the oil outlet of the oil separator, and the second oil return branch connects the air inlet of the compressor with the oil after passing through the vicinity of the heat exchanger. The oil outlet of the separator is connected to

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