Oil supply assembly, compressor and control method

Abstract

The invention provides an oil supply assembly, a compressor and a control method. The oil supply assembly comprises a fan, and the fan is configured to adjust the pressure difference between the two ends of a crankshaft center oil hole according to the real-time rotating speed of a compressor motor so that the crankshaft center oil hole can be normally oiled when the compressor motor runs. The technical problems that the rotating speed of a fan of an oil supply assembly of a compressor is consistent with the rotating speed of a crankshaft of the compressor, the oil supply amount is limited by the rotating speed of a crankshaft, and consequently oil supply is not smooth during operation of the compressor are solved, the rotating speed range of the compressor motor is widened, and on the other hand, the oil spitting rate of the compressor can be reduced.

Description

technical field [0001] The invention belongs to the technical field of compressors, and in particular relates to an oil supply assembly, a compressor and a control method. Background technique [0002] The fan speed of the oil supply assembly of the existing rolling rotor compressor is the same as the crankshaft rotation speed of the compressor, and the oil supply is limited by the crankshaft speed. There is a demand for the compressor to operate at an ultra-low speed in the market, such as considering the heat management of the whole vehicle The air conditioner of new energy vehicles, under certain conditions of some models, only needs to cool down the power battery, the required cooling capacity is very low, which is very different from the required cooling capacity when running at full load. At this time, the working speed of the compressor motor even only It needs 5rps. The minimum working speed of the existing compressor motor generally requires more than 10rps. If it i...

AI Technical Summary

Problems solved by technology

[0002] The fan speed of the oil supply assembly of the existing rolling rotor compressor is the same as the crankshaft rotation speed of the compressor, and the oil supply is limited by the crankshaft speed. There is a demand for the compressor to operate at an ultra-low speed in the market, such as taking into account the heat management of the whole vehicle For air conditioners of new energy vehicles, when it is only necessary to cool down the power battery under certain conditions in some models, the required cooling capacity is very low, which is quite different from the required cooling capacity when running at full load. It needs 5rps. The minimum working speed of the existing compressor motor generally requires more than 10rps. If it is lower than 10rps, it will be difficult to oil and there is a risk of poor lubrication.

In addition, the oil discharge rate of the existing compressor increases faster with the increase of the compressor motor speed, and to reduce the oil discharge rate, an additional oil separation device is required, which will increase the power consumption of the compressor

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