Method and device for adaptively adjusting frequency of conditioner motor and air conditioner

Abstract

The invention discloses a method and a device for adaptively adjusting frequency of a conditioner motor and an air conditioner. The method includes: acquiring an acoustic signal of a conditioner indoor unit; acquiring initial operating frequencies of a motor of a conditioner fan and determining each abnormal sound pre-estimated frequency; subjecting the acoustic signal to spectral analysis to determine an amplitude value of the acoustic signal under each abnormal sound pre-estimated frequency; if the amplitude value of the acoustic signal under the i-th abnormal sound pre-estimated frequency is greater than an abnormal sound preset threshold, determining that the motor produces abnormal sound when running under the i-th initial operating frequency; combining the initial operating frequencies where the abnormal sound occurs into a resonant abnormal sound frequency range. The method and the device have the advantages that according to the relevancy between abnormal sound generation frequencies and motor operating frequencies, the acoustic signal is subjected to spectral analysis through the motor operating frequencies, whether or not the abnormal sound occurs is judged, the resonant abnormal sound frequency range is set, and the indoor fan can constantly adaptively avoid the resonant abnormal sound frequencies during operating so that the abnormal sound is effectively avoided.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a method and device for adaptively adjusting the frequency of an air conditioner motor and an air conditioner. Background technique [0002] Air conditioner indoor units, especially cabinet air conditioner indoor units, sound quality is very unstable when the fan is running. The force increases as the current increases, causing the motor to vibrate and make noise. When the speed of the fan reaches a certain frequency range, the vibration generated by the motor is amplified by the volute and resonates with the body and the wind wheel, and the sound will be amplified to form abnormal sound, which directly affects people's lives. The traditional processing method is to manually measure the frequency of resonance abnormal sound (referred to as resonance point) before each type of machine leaves the factory, and skip the resonance point directly when the fan is running to ac...

AI Technical Summary

Problems solved by technology

However, since the body, wind wheel and motor of each indoor unit of an air conditioner are different, the frequency of the abnormal resonance sound is also different. Using this method of manual measurement and setting of the resonance point requires different types of air conditioners. The machines are adjusted separately, and every time a new product is launched, the resonance point range needs to be reset, which will undoubtedly affect the progress of new product development

At the same time, with the use of the air conditioner, the aging of the motor, wind wheel and body structure may cause the resonance point to drift. The frequency set at the factory cannot avoid the abnormal resonance of the air conditioner indoor unit at this time, which will still affect to the user's normal life

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