Oil return system of compressor and detection method of oil return state of compressor

Abstract

The invention aims to provide a compressor oil return system and a compressor oil return state detection method. The compressor oil return system comprises a compressor, an oil-gas separator, an oil return pipe, a gas return pipe, a gas exhaust pipe, a first throttling component, a first temperature sensing component and a second temperature sensing device. The compressor is provided with an air suction port and an exhaust port. The oil-gas separator is provided with an inlet, an outlet and an oil return port. The first end of the oil return pipe is connected with the oil return port of the oil-gas separator. The gas return pipe is communicated with the second end of the oil return pipe and then is connected with the air suction port of the compressor. The gas exhaust pipe is connected between the inlet of the oil-gas separator and the exhaust port of the compressor. The first throttling component is arranged on the oil return pipe. The first temperature sensing component is arranged on the oil return pipe and located between the first throttling component and the second end of the oil return pipe, and is used for detecting first temperature of the oil return pipe. The second temperature sensing device is used for obtaining the oil return temperature when oil is insufficient. The compressor oil return system and the compressor oil return state detection method are simple, reliable and low in cost.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a compressor oil return system and a method for detecting the oil return state of the compressor. Background technique [0002] In the air conditioner unit of the prior art, the compressor continuously discharges the oil-air mixture into the high-pressure system. If the compressor system cannot return oil normally, the compressor will soon be short of oil and cause the compressor to fail due to poor lubrication. In the prior art, the capillary is generally used to directly return the oil from the high-pressure oil-gas separator or oil reservoir of the system to the suction port of the compressor for oil replenishment. Since this oil return method cannot detect the oil return status, it is generally installed in the oil pool of the compressor. A float switch or an oil level switch is used to detect the oil level, but the cost is too high. Contents of the invention [0003] ...

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Problems solved by technology

[0002] In the air conditioning unit of the prior art, the compressor continuously discharges the oil-air mixture into the high-pressure system. If the compressor system cannot return oil normally, the compressor will soon be short of oil, causing the compressor to fail due to poor lubrication

In the prior art, the capillary is generally used to directly return the oil from the high-pressure oil-gas separator or oil reservoir of the system to the suction port of the compressor for oil replenishment. Since this oil return method cannot detect the oil return status, it is generally installed in the oil pool of the compressor. Float switch or oil level switch is used to detect oil level, but the cost is too high

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