A control method for an air conditioner compressor driven by a multi-speed motor

Abstract

A multi-speed motor driven air conditioner compressor comprises a machine shell and a motor arranged in the machine shell, and is characterized in that the motor is a multi-speed motor; the multi-speed motor is provided with a power supply terminal and at least two speed regulation taps used for regulating the rotational speed of the motor; the compressor further comprises a controller, on-off switching devices and a temperature detection device, and the controller, the on-off switching devices and the temperature detection device are arranged outside the machine shell; the power supply terminal is connected with a network source; the on-off switching devices and the temperature detection device are all electrically connected with the controller; the on-off switching devices are electrically connected with the corresponding speed regulation taps and used for connecting the network source to loops wherein the speed regulation taps are located. By adopting the multi-speed motor driven air conditioner compressor, repeated restarting of the motor can be avoided, the working noise is low, power consumption is less, and cost is lower. Besides, the invention further provides a control method of the multi-speed motor driven air conditioner compressor. According to the method, multi-rotational-speed regulation of the motor can be still realized without a special driving controller.

Description

technical field [0001] The invention relates to a control method of an air conditioner compressor driven by a multi-speed motor. Background technique [0002] The air conditioner compressor is the heart of the refrigeration system. It inhales low-temperature and low-pressure refrigerant gas from the suction pipe, drives the piston to compress it through the operation of the motor, and discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe to provide power for the refrigeration cycle. , so as to realize the refrigeration cycle of compression→condensation→expansion→evaporation to meet the cooling and heating needs of different ambient temperatures. At present, there are mainly two types of compressors, one is the variable frequency compressor, which is driven by a DC motor to realize the compression cycle, and the other is the fixed speed compressor, which is powered by a constant speed motor. "Variable frequency" and "fixed speed" are two types of ...

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Problems solved by technology

[0003] However, the existing fixed-speed compressors and inverter compressors have the following problems: the fixed-speed compressor works intermittently, the motor needs to be restarted frequently, so the working noise is relatively large, the current of the motor is large when starting, and the power consumption is also large. ;The variable frequency compressor works continuously, so there is no problem of repeated start-up of the motor. Compared with the fixed speed compressor, the noise is lower and the power consumption is less, but the variable frequency compressor needs to be equipped with a special drive controller, a set of drive The cost of the controller accounts for 30% of the cost of the entire air conditioner, so the price of the inverter compressor is relatively expensive

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