Method and device for adjusting rotating speed of inner fan of air conditioner

An adjustment method and adjustment device technology, applied in the direction of machine/engine, mechanical equipment, motor control, etc., can solve problems such as abnormal noise, slow start-up speed of internal fan, etc., and achieve the effect of fast speed response, small speed fluctuation, and stable start-up
CN103185016AActive Publication Date: 2013-07-03GREE ELECTRIC APPLIANCES INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GREE ELECTRIC APPLIANCES INC
Publication Date
2013-07-03

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Abstract

The invention discloses a method and a device for adjusting the rotating speed of an inner fan of an air conditioner. The adjusting method is used for adjusting the rotating speed of the inner fan by means of a PI algorithm via a P parameter and an I parameter according to a difference value between the practical rotating speed and the target rotating speed of the inner fan. In the process of adjusting the rotating speed of the inner fan, the method comprises the following steps: detecting the practical rotating speed of the inner fan; calculating the rotating speed difference of the inner fan, wherein the rotating speed difference is the difference between the practical rotating speed and the target rotating speed; correcting the I parameter and / or the P parameter according to the rotating speed difference; and adjusting the rotating speed difference of the inner fan by means of the PI algorithm via a corrected parameter according to the rotating speed difference. Due to the adoption of the method and the device, the rotating speed response of an indoor motor is quick, the static errors and dynamic overshoot are lowered, high anti-interference performance is achieved, the aim of mute drive is fulfilled, and the comfort of the air conditioner is improved.
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Description

technical field

[0001] The invention relates to the field of air conditioners, in particular to a method and device for adjusting the rotational speed of an internal fan of an air conditioner. Background technique

[0002] At present, the indoor fan blades of air conditioners are mostly driven by PG motors (single-phase asynchronous motors) or built-in DC motors. The motors have a speed feedback device. When adjusting the speed, according to the difference between the speed feedback signal and the target speed, through a simple PI algorithm After calculation, adjust the hysteresis zero-crossing chopping time or PWM duty cycle to achieve the purpose of speed regulation of the internal fan.

[0003] In the process of adjusting the speed of the internal fan, the PI adjustment calculation parameters Kp and Ki are fixed, the algorithm has poor applicability and anti-interference performance, and the following four phenomena are prone to occur:

[0004] (1) start overshoot; [0...

Claims

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