A method and device for heating a compressor by using a stator winding

Abstract

The invention discloses a method and a device for heating a compressor by using a stator winding. The method includes the following steps: Step S10: collect the outdoor temperature through a temperature sensor; Step S11: the main control module judges the size of the heating current according to the collected outdoor temperature, and sends an instruction to adjust the size of the heating current to the frequency converter; Step S12: The frequency converter receives the control command, and uses the vector control method to control the PWM wave to generate the corresponding current to heat the compressor. The invention heats the compressor by adopting a vector control method, thereby improving the reliability and stability of the commercial air-conditioning heating compressor, and at the same time, improving the heating control precision, reducing energy consumption, and saving costs.

Description

Technical field [0001] The present invention relates to the technical field of air conditioning compressor equipment, and more particularly to a method and apparatus for heating of compressor by a stator winding. Background technique [0002] The lubrication during the operation of the air conditioner compressor is in sucking the lubricating oil after rotation of the spindle, and the rotational member is ejected by the upper portion of the spindle center oil hole. If the lubricating oil is too low, the viscosity of the lubricants will affect the oil of the oil, and the compressor cannot be lubricated well, so that the machine is damaged, so it is necessary to improve the lower reservoir of the compressor. Guarantee lubrication. [0003] The conventional heating scheme is to use an electric heating, winding an electric heating in the outer portion of the compressor's cavity, and the main controller reaches the lubricating oil inside the heated compressor by supplying electric heat...

AI Technical Summary

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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