Air conditioner outdoor fan starting method

Abstract

The invention discloses an air conditioner outdoor fan starting method. The air conditioner outdoor fan starting method comprises the following steps of initializing, main controlling and noise feeding back. In the initializing step, an air conditioner is powered on to be started, a main control chip gives an outdoor fan starting instruction, and an EEPROM provides a PWM voltage with the initial duty ratio value being a to an outdoor fan. In the main controlling step, the outdoor fan feeds back the actual rotation speed to the main control chip, the main control chip compares the actual rotation speed with a target rotation speed, and if the actual rotation speed is lower than the target rotation speed, the duty ratio value of the PWM is increased according to the time interval T until the actual rotation speed is equal to the target rotation speed. In the noise feeding back process, noise signals are collected regularly, the strength of the noise signals is compared with target noise strength and if the noise strength is higher than the target strength, the value of the time interval T is increased. According to the air conditioner outdoor fan starting method, the noise strength signal is collected and fed back to a control system to be used as a parameter for outdoor fan starting control, the duty ratio of the fan starting voltage is adjusted in an adaptive mode, the starting noise is effectively reduced, and the matching and debugging workload of a fan system is also reduced.

Description

technical field [0001] The invention belongs to the technical field of motor start-up control, and relates to a motor start-up control method, in particular to a start-up method for an air conditioner outdoor fan. Background technique [0002] In the control of the air conditioner, in order to control the operation of the external fan, the EEPROM sets an initial PWM (pulse width modulation) duty cycle value a for an initial interval T, and then the fan starts and runs. After the fan is running, the actual speed will be fed back to the The main control chip, the main control chip compares the actual speed with the target speed, if the actual speed is less than the target speed, increase the PWM duty cycle value, the actual speed is equal to the target speed, and the start-up mode of the air conditioner external fan is completed, every time the PWM duty cycle value is changed Both the interval time and the amount of change are fixed values, and the system does not take into a...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of large noise and difficult control during the start-up process of the outdoor fan of the existing air conditioner, the present invention provides a start-up method for the outdoor fan of the air-conditioner. The noise intensity signal is collected as a parameter for the start-up control of the outdoor fan, and the start-up voltage of the fan is adaptively adjusted. duty cycle to reduce startup noise

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