Ventilation equipment and its control method and device

Abstract

The invention discloses an air pumping / supplying device and a control method thereof, wherein, the control method calculates the current target value of the DC bus bar through the target air volume and the actual air volume of the air extraction / supply equipment, adjusts the actual value of the DC bus bar current through the current target value of the DC bus bar, and adjusts the motor of the airextraction / supply equipment so as to make the actual air volume approach to the target air volume. Adjusting the output of the motor with the actual air volume and the target air volume can stably guarantee the actual air volume of the equipment, keep the constant air volume of the equipment, and reduce the influence of the running state, the running environment and the performance of the equipment on the use effect.

Description

technical field [0001] The invention relates to the technical field of household electrical appliances, in particular to a ventilation device and a control method and device thereof. Background technique [0002] At present, high-speed miniaturized DC motors are more and more widely used, especially in the field of small electric tools (such as hand-held ventilation equipment such as hand-held vacuum cleaners). When the miniaturized electric tools are powered by batteries, the battery voltage will increase with the use time A gradual drop may lead to poor performance at the same gear. Taking a handheld vacuum cleaner as an example, a drop in battery voltage will cause a decrease in air suction and poor cleaning performance. [0003] In the prior art, the constant power control method is usually used to improve the cleaning ability of the handheld vacuum cleaner. The method used is usually to adjust the duty cycle of the motor through the DC bus voltage / current to control the...

AI Technical Summary

Problems solved by technology

[0002] At present, high-speed miniaturized DC motors are more and more widely used, especially in the field of small electric tools (such as hand-held ventilation equipment such as hand-held vacuum cleaners). When the miniaturized electric tools are powered by batteries, the battery voltage will increase with the use time Gradual decline may lead to poor performance in the same gear. Taking a handheld vacuum cleaner as an example, the drop in battery voltage will cause a decrease in air suction and poor cleaning performance.

[0003] In the prior art, the constant power control method is usually used to improve the cleaning ability of the handheld vacuum cleaner. The method used is usually to adjust the duty cycle of the motor through the DC bus voltage / current to control the motor with constant power. However, the inventor found that , only constant control of the motor power for the DC bus voltage / current, and the cleaning effect of the hand-held vacuum cleaner cannot be well guaranteed during use

Images