At the same time, the module is controlled by the control signal sent by the microcomputer z9.

What is the working principle of Zhigao inverter air conditioning?

The main difference between inverter air conditioners and ordinary ones is that an inverter is added. The working principle of AC inverter air conditioner is to convert industrial frequency AC power into DC power, and send it to the power module (high-power transistor switch combination); at the same time, the module is controlled by the control signal sent by the microcomputer, outputs adjustable-frequency power (synthesized waveform similar to sine wave), making the speed of compressor motor change accordingly with the power frequency, thereby controlling the displacement of the compressor, adjusting the refrigeration and heating capacity. For DC inverter air conditioners, the controllable DC power output from the module is delivered to the motor of the compressor to control the displacement of the compressor. Since a DC motor is used in the compressor, the air conditioner can save more electricity and produce less noise. In addition, inverter technology has evolved from AC type to DC type, and control technology has developed from PWM (Pulse Width Modulation) to PAM (Pulse Amplitude Modulation). The rotational speed of compressors adopting PWM control mode is limited by the upper limit speed, generally not exceeding 7000 rpm, while the rotational speed of compressors adopting PAM control mode can be increased by about 1.5 times, which greatly improves the refrigeration capacity.

Source: http://blog.sina.com.cn/zhigaokongtiaowx