Control method of outdoor fan motor of air conditioner

Abstract

The invention discloses a control method for an outdoor fan motor of an air conditioner, which comprises the following steps: determining the required rotational speeds of a first outdoor fan motor and a second outdoor fan motor according to the operating conditions of the air conditioner, and sending the required rotation speeds to the first outdoor fan motor and the second outdoor fan motor respectively. Two, the outdoor fan motor outputs the control signal of the operating frequency corresponding to the required speed, and the operating frequency of the two is different at the same time; monitor the exhaust pressure of the air conditioner during cooling or the suction pressure during heating; the measured The exhaust pressure or the suction pressure is compared with the preset pressure, and the rotation speed of the first outdoor fan motor and the second outdoor fan motor are controlled according to the comparison result. Because the control method adopts two independent frequency control methods of two motors, the operating noise of the air conditioning unit is reduced, and the operating frequency range of the motor is increased, so that the air volume can be adjusted more accurately, and the pressure and temperature of the unit can be controlled at a reasonable level. range to stabilize the operating effect of the unit.

Description

technical field [0001] The invention relates to a control method of an air conditioner, in particular to a control method of an outdoor fan motor of the air conditioner. Background technique [0002] Existing multi-connected side air outlet units are generally equipped with an upper outdoor fan, a lower outdoor fan, an upper outdoor fan motor for driving the upper outdoor fan to rotate, a lower outdoor fan motor for driving the lower outdoor fan to rotate, and a motor for controlling the upper outdoor fan. Controllers for the outdoor fan motor and the lower outdoor fan motor. At present, the frequency of the upper outdoor fan motor and the lower outdoor fan motor at the same time is the same, so that when the upper outdoor fan motor and the lower outdoor fan motor run at the same time, the direction and phase of the vibration acting on the structural parts will be consistent, so that Resonance is formed and a large noise is generated; when the upper outdoor fan motor and th...

AI Technical Summary

Problems solved by technology

At present, the frequency of the upper outdoor fan motor and the lower outdoor fan motor at the same time is the same, so that when the upper outdoor fan motor and the lower outdoor fan motor run at the same time, the direction and phase of the vibration acting on the structural parts will be consistent, so that Resonance is formed and a large noise is generated; when the upper outdoor fan motor and the lower outdoor fan motor run at different speeds, the vibration phase will be inconsistent at this time, but the phase difference will decrease with the running time, once the vibration phase is consistent Will form resonance of structural parts to generate noise

Moreover, once the resonance is formed, the vibrations of the upper outdoor fan motor and the lower outdoor fan motor acting on the structural parts will strengthen each other, so that they will not actively exit the resonance, so the noise will continue and affect the user's use

Moreover, the frequency of the upper outdoor fan motor and the lower outdoor fan motor is the same at the same time, so that the total operating frequency range of the two outer fan motors is small, and precise control cannot be achieved.

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