Range hood controlling method making impeller free of manual maintenance

Abstract

The invention discloses a range hood controlling method making an impeller free of manual maintenance. The method comprises the following steps that (1) a range hood is started for the first time; (2)a motor of a fan of the range hood is rotated forwards or reversely, according to the formula that M is equal to I*B, wherein M represents the impeller mass, n represents the rotation speed of the motor, I represents the rotational inertia, B represents the angular acceleration, the mass M<1> of the impeller at the first start is thus obtained, and the normal operation of the range hood is kept until the range hood is shut down; (3) the range hood is started for the (t)th time, wherein t is greater than or equal to 2, the motor is rotated forwards or reversely, the mass M<t> of the impeller at the (t)th start is recorded, and the mass M<t> is transmitted to a power supply board; (4) the power supply board performs analysis to obtain that the mass change delta m of the impeller is equal toM<t>-M<t-1> when the range hood is started for the (t)th time and the (t-1)th time; (5) the power supply board determines that the rotation speed needs to be increased by delta n according to the relationship between the impeller mass and the rotation speed of the motor, and the power supply board determines that the rotation speed needs to be increased by delta n1 according to the relationship between the impeller mass and the aerodynamic loss; and (6) finally, the rotation speed N is increased to the rotation speed generated after delta n and delta n1 are corrected, and then the aerodynamicperformance of the fan is compensated.

Description

technical field [0001] The invention relates to a cooking fume purifying device, in particular to a control method for an impeller of a range hood without manual maintenance. Background technique [0002] The range hood has become one of the indispensable kitchen appliances in modern families. The range hood works by using the principle of fluid dynamics. Grease particles. The centrifugal fan includes a volute, an impeller installed in the volute and a motor that drives the impeller to rotate. When the impeller rotates, a negative pressure suction is generated in the center of the fan, and the oil fume under the range hood is sucked into the fan, and after being accelerated by the fan, it is collected by the volute and guided out of the room. [0003] The range hood is an indispensable kitchen appliance in every family. Its function is to inhale the oil fume from the air inlet through the high-speed rotating impeller in the volute, use the impeller to filter the oil fume, ...

AI Technical Summary

Problems solved by technology

The strong alkaline detergent needed for regular cleaning of the impeller, on the one hand, it will corrode the surface of the impeller, cause the blades to rust, and reduce the rigidity of the impeller, and regular cleaning of the impeller requires service workers to come to maintain it, wasting human resources; on the other hand, it will damage the Impeller dynamic balance

Two aspects cause the vibration of the whole machine to increase when the impeller of the range hood is running at high speed, reducing the service life of the range hood; at the same time, it will increase the noise and even produce low-frequency abnormal sound

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