Governor for AC blower fan

Abstract

Disclosed is an AC fan speed regulator, which comprises a single chip microcomputer which is inside preset with the work mode and the temperature set value of the AC fan speed regulator; a temperature sensor which is used for detecting the current temperature of the controlled environment and sending the result into the single chip microcomputer; an output module which comprises a controllable silicon for changing the voltage of the AC fan according to the instruction of the single chip microcomputer and a zero-crossing detecting circuit of a zero-crossing input single chip microcomputer for detecting the alternating current loaded to the controllable silicon; and a power module. The single chip microcomputer compares and calculates the current temperature of the controlled environment detected by the temperature sensor with the inside preset temperature, and controls the conduction angle of the controllable silicon according to the difference of the current temperature of the controlled environment and the temperate set value. The regulator adopts single chip microcomputer technology, upgrades the function the of the conventional AC fan speed regulator, can perform closed loop control based on the detected temperature, preset work mode, and the temperature set value, and also can perform stepless speed control for the AC fan, and control the turn-on or turn-off of the AC fan.

Description

technical field

[0001] The invention relates to an AC fan speed controller, in particular to an AC fan speed controller used for temperature control. Background technique

[0002] Most of the AC fan speed control systems are related to temperature control, such as cabinet cooling fans for electric power and communication equipment, central air-conditioning fan coil control, etc. This type of application is generally open-loop control, and the speed is adjusted manually by switching the series inductor with a switch or switching different taps of the tapped fan. Some also use closed-loop temperature control. Generally, ordinary temperature control switches are used. The fan can only be turned on or off according to the temperature, and the speed cannot be adjusted. Contents of the invention

[0003] The object of the present invention is to provide an AC fan speed controller which can steplessly adjust the speed of the AC fan according to the detected current temperature o...

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