At present, the power module is the most widely used in inverter air conditioners. Through PWM pulse control, the AC variable frequency power supply mode of compressor is realized. The shape and circuit principle of variable frequency compressor with frequency conversion module for variable frequency air conditioner.
Its rotating speed changes with the power frequency, so the refrigerating capacity or heating capacity of the compressor changes in direct proportion to the power frequency. The throttling device of variable frequency air conditioner adopts electronic expansion valve. Precautions in the use of inverter air conditioners give full play to the advantages of energy saving and avoid long-term high-load use. Try to set up automatic gear operation and make use of the adaptability of the power grid. Its rotating speed changes with the power frequency, so the refrigerating capacity or heating capacity of the compressor changes in direct proportion to the power frequency.
The compressor of variable frequency air conditioner is driven by variable frequency motor, and the inverter outputs variable frequency alternating current to the motor, so that the rotation speed of the motor can be changed according to the needs of indoor refrigeration capacity, and finally the refrigeration capacity of the compressor can be automatically and continuously controlled. That is, when the frequency of the inverter output increases.
Compressor speed increases-output power increases. When the frequency converter output frequency decreases, the compressor speed decreases-the output power decreases. Compared with constant frequency air conditioner, variable frequency air conditioner can control indoor temperature according to input frequency, adjust compressor motor speed and refrigerant flow according to load change.