Control device and control method of air conditioner compressor and variable-frequency air conditioner

Abstract

The invention provides a control device of an air conditioner compressor. The control device comprises a main circuit unit and a weak-magnetic closed-loop regulating circuit, wherein the weak-magnetic closed-loop regulating circuit acquires working data information of the compressor from the main circuit unit, performs analysis and computation according to the acquired information, and supplies a control signal to a contravariant circuit of the main circuit unit so as to control the working voltage and working frequency of the compressor. The invention also provides a variable-frequency air conditioner with the control device of the air conditioner compressor. The invention further provides a control method of the air conditioner compressor. The control method comprises the following steps of: supplying power to the compressor by the main circuit unit; acquiring the working data information of the compressor from the main circuit unit by using the weak-magnetic closed-loop regulating circuit; performing analysis and computation according to the acquired information; and supplying the control signal to the contravariant circuit so as to control the working voltage and working frequency of the compressor. A power factor correction (PFC) circuit is matched with the weak-magnetic closed-loop regulating circuit to realize the high-efficiency and stable running of the compressor in a high-frequency area and a low-frequency area.

Description

technical field [0001] The invention relates to the field of frequency conversion air conditioners, in particular to a control device for an air conditioner compressor, a frequency conversion air conditioner with the control device and a control method for the air conditioner compressor. Background technique [0002] With the trend of global warming becoming more and more obvious, it is an indisputable fact that air conditioners have become a large energy consumer. Since there is still the possibility of technical improvement in air-conditioning energy saving, this field has received widespread attention. Household air conditioners use frequency conversion technology to regulate the speed of the compressor drive motor, change the flow of refrigerant, and realize the economical operation mode of the air conditioning and refrigeration system. As a mainstream research direction, variable frequency drive of DC compressors mainly includes PFC boost mode and magnetic field weaken...

AI Technical Summary

Problems solved by technology

However, in the prior art, these two methods of improving the high-frequency operating characteristics of the air conditioner are used separately, and the advantages of the two cannot be effectively combined, so the high-quality high-frequency output and low-frequency compensation of the compressor cannot be obtained. characteristics, so that the output is limited during high-frequency operation, and the problems of phase current distortion and high energy consumption during low-frequency operation cannot be well resolved

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