Method and device for heating compressor through stator winding

Abstract

The invention discloses a method and device for heating a compressor through a stator winding. The method comprises the following steps that S10, the outdoor temperature is acquired through a temperature sensor; S11, a main control module determines the heating current according to the acquired outdoor temperature and sends a heating current adjustment instruction to a frequency converter; and S12, the frequency converter receives the control instruction and controls PWM waves to generate corresponding current to heat the compressor through a vector control method. According to the method anddevice for heating the compressor through the stator winding, the vector control method is used for heating the compressor, so that the heating reliability and stability of the compressor of a commercial air conditioner are improved; and meanwhile, the heating control precision is improved, energy consumption is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of air-conditioning compressor equipment, in particular to a method and device for heating a compressor by using a stator winding. Background technique [0002] The lubrication of the air conditioner compressor during operation depends on the rotation of the main shaft to suck up the lubricating oil, and spray it out through the upper part of the oil hole in the center of the main shaft to lubricate the rotating parts. If the lubricating oil temperature is too low and the viscosity of the lubricating oil is too high, it will affect the oil suction lubrication, the compressor cannot be lubricated well, and even the parts will be damaged. Therefore, the oil storage place at the lower part of the compressor must be heated to increase the oil temperature. , to ensure lubrication. [0003] The traditional heating scheme is to use an electric heating belt, and wrap a circle of electric heating belt outside the ca...

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Problems solved by technology

Commercial air-conditioning compressors plan to use this stator winding heating scheme, but because the cavity of commercial air-conditioning compressors is large and the heat transfer effect is poor, the stator windings are located in the middle of the compressor, and the temperature at the top of the compressor is higher than the temperature at the bottom of the compressor during heating At the same time, since the heating current output from the frequency converter must flow through the IPM module, the semiconductor switch of the IPM module is switched on and off at high speed, which will cause large switching losses. Therefore, there are still many needs for the stator winding heating scheme used by commercial air-conditioning compressors. technical problems overcome

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