Method and device for self-inspection of factors affecting speed of indoor fan motor of air conditioner

Abstract

The invention discloses a self-inspection method for factors affecting the speed of an indoor fan motor of an air conditioner, including: detecting the working voltage of the fan motor and the actual speed V of the fan motor; The prompt information of dust removal processing, Vmax is the maximum speed corresponding to the voltage range of the working voltage when the capacitance of the fan motor has no attenuation and the dust is full; when V≤Vmin', it is determined that the capacitance attenuation value of the fan motor is greater than the attenuation maximum value, and the output Prompt information for replacing the capacitor, where Vmin' is the minimum speed corresponding to the voltage range of the working voltage when the capacitance attenuation value of the fan motor is equal to the attenuation maximum value and is in a dust-free state. The invention also discloses a device for self-inspection of factors affecting the rotational speed of an indoor fan motor of an air conditioner. The invention can quickly determine the factors affecting the speed of the blower motor, and prompt relevant personnel in time, which is beneficial to quickly eliminate the influencing factors and improve the stability of the air conditioner.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method and a device for self-checking factors affecting the rotational speed of an indoor fan motor of the air conditioner. Background technique [0002] Most of the motors in air conditioners use capacitor-run asynchronous motors. The characteristic of capacitor-run asynchronous motors is that under a certain voltage, when the AC motor is equipped with the same wind wheel load, heat exchanger and body, the motor is stable in a speed range. Usually called rated speed. However, after long-term operation of the air conditioner, dust and fine particles or flocs usually accumulate on the heat exchanger and air intake filter of the air conditioner. When these impurities accumulate to a certain extent, the air intake of the air conditioner decreases. As far as the motor is concerned, the load on the motor decreases, and the fan speed will increase. In addition, the life cy...

AI Technical Summary

Problems solved by technology

However, after long-term operation of the air conditioner, dust and fine particles or flocs usually accumulate on the heat exchanger and air intake filter of the air conditioner. When these impurities accumulate to a certain extent, the air intake of the air conditioner decreases. As far as the motor is concerned, the load on the motor decreases, and the fan speed will increase

In addition, the life cycle of an air conditioner is a relatively long process. After a long-term operation of the fan capacitor, the capacitance value will have a certain attenuation, especially in the air conditioner with stepless speed regulation method controlled by chopper. Obviously, when the capacitance attenuation of the running motor reaches a certain level, the actual speed of the fan motor will drop significantly

Therefore, capacitance attenuation and dust accumulation will have a great impact on the fan speed of the air conditioner, causing a difference between the actual operating speed and the rated speed, which directly affects the cooling and heating capacity of the air conditioner, and further affects the stability of the air conditioner. greater impact

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