Method for controlling frequency inverter air conditioner outdoor fan and compressor vibration noise

Abstract

The invention relates to a method for controlling frequency inverter air conditioner outdoor fan and compressor vibration noise. The rotation speed of a wind wheel (1) of an air conditioner outdoor fan is Y r / min. The number of the blade of the wind wheel (1) is Z. The rotation fundamental frequency of the blade of the wind wheel (1) is F1:F1=Z*Y / 60 Hz. The rotation frequency of a compressor (2) is X Hz. The method is characterized in that when the operation frequency of the compressor (2) X is between 65 Hz and 150 Hz, the rotation speed of the wind wheel (1) is in the range of 800 r / min to 950 r / min, and the following relationships exist: the absolute value of the difference between the rotation frequency of the compressor X and double rotation fundamental frequency of the blade of the wind wheel (1) is greater than 5 Hz, namely |X-2*F1|>5 Hz. The method provided by the invention can greatly weaken or completely eliminate the vibration formed by the superimposition of the wind wheel and the compressor rotation noise, thereby the sound quality the noise of the air conditioner outdoor unit is significantly improved, the sheet metal structure resonance can be effectively avoided, the vibration can be reduced, the sound quality can be improved, the noise can be reduced, and the reliability of the whole machine can be improved.

Description

technical field [0001] The invention relates to a method for controlling the flapping noise of an outdoor fan and a compressor of a variable frequency air conditioner, which belongs to the transformation technology of the method for controlling the flapping noise of an outdoor fan of a variable frequency air conditioner and a compressor. Background technique [0002] The increasingly stringent energy and environmental problems have forced all air-conditioning manufacturers to increase the operating frequency of air-conditioning compressors and develop inverter air-conditioning products in order to improve the cooling and heating capacity of the air-conditioner on a small compressor body and improve the energy efficiency ratio of the air-conditioner. Speed ​​up the cooling and heating effect. For example, increase the frequency of the air conditioner compressor to above 65HZ, use 80HZ, 90HZ, or even above 100HZ. As the frequency of the air conditioner compressor increases, t...

AI Technical Summary

Problems solved by technology

As the frequency of the air conditioner compressor increases, the amplitude of the compressor's rotational noise increases. When the amplitude of the compressor's rotational noise increases, it is also related to the fundamental frequency (BPF, Blade Passing-by Frequency) When it is close to 2 times of , the rotation noise of the compressor and the rotation noise of the wind wheel are superimposed, resulting in serious beating vibration phenomenon, resulting in obvious low-frequency pulsating abnormal sound when the outdoor unit system is running. The natural frequencies of human organs are similar, which makes people feel irritable and uneasy, which seriously affects the sound quality and comfort of the outdoor unit of the air conditioner. At the same time, because the rotation frequency of the compressor is equivalent to twice the fundamental frequency of the blades of the wind wheel, during operation It is easy to cause resonance of the sheet metal structure, which seriously affects the reliability of the air conditioning system

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