Constant-flow blower fan and control method thereof

Abstract

The invention discloses a constant-flow blower fan and a control method thereof. The control method of the constant-flow blower fan comprises the steps that S100, when the rotating speed of the constant-flow blower fan is n and the value of an output current of a variable-frequency driver is less than a set value, the output current of the variable-frequency driver is increased; when the value of the output current of the variable-frequency driver is greater than the set value, the output current of the variable-frequency driver is decreased. The working current and voltage of the blower fan are controlled by controlling the output current of the variable-frequency driver, and therefore the rotating speed of the blower fan is controlled; after the rotating speed of the blower fan is changed, the corresponding air quantity will be changed, and therefore the air quantity of the blower fan is kept in a reasonable range, and using performance of the blower fan is improved.

Description

technical field [0001] The invention relates to the technical field of centrifugal fan control, in particular to a constant flow fan and a control method thereof. Background technique [0002] Fans are used in a variety of environments. During use, the air duct is often blocked and the static pressure changes. Moreover, the manufacturer can only obtain the air volume generated under various simulated conditions in the laboratory, and cannot grasp the final use. time effect. [0003] Traditional fans are generally constant speed or constant torque fans. When the fan is abnormal, the air volume of the fan cannot be effectively controlled. When the air duct is blocked, the air volume of the fan will decrease sharply, the suction will decrease, and the performance will be greatly reduced. Contents of the invention [0004] The object of the present invention is to provide a control method of a constant flow fan capable of keeping the air volume generated by the fan within a r...

AI Technical Summary

Problems solved by technology

[0002] Fans are used in a variety of environments. During use, the air duct is often blocked and the static pressure changes. Moreover, the manufacturer can only obtain the air volume generated under various simulated conditions in the laboratory, and cannot grasp the final use. when the effect

[0003] Traditional fans are generally constant speed or constant torque fans. When the fan is abnormal, the air volume of the fan cannot be effectively controlled. When the air duct is blocked, the air volume of the fan will decrease sharply, the suction will decrease, and the performance will be greatly reduced.

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