Refrigeration system and control method thereof

Abstract

The invention discloses a refrigeration system and a control method of the refrigeration system. The refrigeration system comprises a compressor, a heat exchanger assembly, an ejection pipeline, a control valve and a controller. The compressor is provided with a first oil level detection part and a second oil level detection part, and the first oil level detection part and the second oil level detection part are used for detecting oil levels at different positions in the compressor. The heat exchanger assembly is provided with an ejection port. One end of the ejection pipeline communicates with the ejection port, and the other end of the ejection pipeline communicates with the compressor. The control valve is arranged on the ejection pipeline to control on-off of the ejection pipeline. Thefirst oil level detection part, the second oil level detection part and the control valve are all connected with the controller. According to the refrigeration system, the controller judges the stateof the oil level in the compressor by combining the detection results of the first oil level detection part and the second oil level detection part so as to control the state of the control valve forcontrolling on-off of the ejection pipeline, and therefore controllability of ejection and oil return of the heat exchanger assembly for the compressor can be achieved.

Description

technical field [0001] The present invention relates to the technical field of compressors, in particular to a refrigeration system and a control method thereof. Background technique [0002] After the refrigeration system has been running for a long time, part of the lubricating oil will enter the low-pressure side from the high-pressure side of the refrigeration system. Very low, the viscosity of the refrigerating machine oil entering the evaporator increases, and it is not easy to be brought back to the compressor by the refrigerant, which not only adversely affects the heat exchange effect of the low-side heat exchanger, but also reduces the heat exchange efficiency of the refrigeration system. In the related art, the evaporator in the refrigeration system mostly adopts a dry type evaporator, and the oil is pumped back into the compressor by using suction to carry the oil, but the effect is not ideal, and the heat exchange effect of the evaporator is poor. Contents of ...

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Problems solved by technology

[0002] After the refrigeration system has been running for a long time, part of the lubricating oil will enter the low-pressure side from the high-pressure side of the refrigeration system. Very low, the viscosity of the refrigerating machine oil entering the evaporator increases, and it is not easy to be brought back to the compressor by the refrigerant, which not only adversely affects the heat transfer effect of the low-side heat exchanger, but also reduces the heat transfer efficiency of the refrigeration system

In the related technology, the evaporator in the refrigeration system mostly adopts a dry evaporator, and the oil is pumped back into the compressor by using suction to carry the oil, but the effect is not ideal, and the heat exchange effect of the evaporator is poor

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