Control method and system of air conditioner carrier frequency and air conditioner

Abstract

The invention provides a control method and system of air conditioner carrier frequency, an air conditioner, a computer device and a computer readable storage medium. The control method of the air conditioner carrier frequency comprises the steps that the rotating speed of a compressor of the air conditioner is acquired in real time; the rotating speed of the compressor and the preset rotating speed are compared; if the rotating speed of the compressor is lower than the preset rotating speed, the carrier frequency of the air conditioner is set to be the first preset carrier frequency; if the rotating speed of the compressor is higher than or equal to the preset rotating speed, the carrier frequency of the air conditioner is set to be the second preset carrier frequency; and the second preset carrier frequency is larger than the first preset carrier frequency. According to the technical scheme of the control method and system, when the rotating speed of the compressor is low, low carrier frequency is adopted, the opening and closing loss of a module is reduced, and the heating of the module is reduced; and when the rotating speed of the compressor is high, high carrier frequency isadopted, the noise of the compressor is reduced, the heating of the compressor is reduced, and the control performance and the stability of the system are improved.

Description

technical field [0001] The present invention relates to the technical field of air conditioners, in particular, to a method for controlling the carrier frequency of an air conditioner, a control system for the carrier frequency of an air conditioner, an air conditioner, a computer device, and a computer-readable storage medium . Background technique [0002] The frequency conversion system of air conditioner is mainly composed of rectifier bridge, electrolytic capacitor, power module and control module. The control module detects the voltage and current signals of the compressor, obtains the control voltage through the vector control algorithm, and then outputs a PWM (Pulse Width Modulation, pulse width modulation) signal to the power module with a certain carrier frequency and modulation algorithm to drive the frequency conversion compressor The machine works stably at the predetermined frequency. The turn-on and turn-off of the IGBT (Insulated Gate Bipolar Transistor, in...

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Problems solved by technology

[0003] As the working range of the air conditioner frequency conversion system compressor becomes wider and wider, it often needs to run at 2 times the rated speed or even higher. At this time, the system needs to use a higher carrier frequency to ensure the performance and stability of the system, but the corresponding IGBT switching loss increases and heat generation increases

[0004] At present, general air conditioner frequency conversion systems usually use a fixed carrier frequency. If a lower carrier frequency is selected, the switching loss will be reduced, but it will also increase the system noise and sacrifice high-speed control performance; if a higher carrier frequency is selected, the switching loss will be reduced. will increase in size and increase in fever

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