Analysis and treatment of low frequency noise of air conditioner motors

 The vibration generated during the operation of motors of the air conditioner outdoor units is transmitted to the wall through the motor bracket, and then produces reflection and reverberation on the wall in the reverberation room, forming a poor sound environment quality and causing discomfort. Carries out the noise source identification and frequency spectrum analysis of the low frequency noise of the air conditioner outdoor units, and proposes the measures to optimize the noise source, improve the noise transmission path and the noise radiation angle, including improving the motor mode and speed, and matching the fan blades, which effectively reducing the low frequency noise of the motors.