Range hood and control method thereof

Abstract

The invention relates to a range hood, which includes a central processing unit, a volute, an impeller and a motor. The motor is provided with a rotational speed detection assembly electrically connected to the central processing unit. For the coil, a second coil capable of inducting with the first coil is arranged on the volute along the circumference; it also includes a speed-adjusting power supply for supplying power to the second coil, and the speed-regulating power supply is electrically connected to the second coil and the central processing unit respectively. The present invention also relates to a control method for a range hood, which obtains the motor rotation frequency b of the current working gear of the range hood, and adjusts the power supply of the speed-regulating power supply when the range hood needs to optimize the functional parameters in the current working gear state frequency, and at the same time detect and obtain the functional parameters of range hoods at different power frequencies, and determine the power frequency corresponding to the optimal functional parameters as the working power frequency of the speed-regulating power supply. The range hood and the control method can adjust the motor speed by adjusting the motor load to achieve better performance.

Description

technical field [0001] The invention relates to a range hood, and also relates to a control method for the range hood. Background technique [0002] Since the range hood entered China in the 1990s, it has become an indispensable kitchen appliance for ordinary people. Its main function is to inhale the cooking fume generated by the user through the fan system impeller from the air inlet, use the air inlet filter and impeller to filter the fume, and discharge the filtered fume from the air outlet, thereby completing the purification of the kitchen environment. As the core component of the range hood, the fan system, rational configuration of its structure has an important impact on improving the effect of the range hood, reducing the escape of the range hood, and improving the air quality in the kitchen. [0003] At present, range hoods on the market generally use AC motors. Although the range hoods using this type of motor have the characteristics of simple structure and low...

AI Technical Summary

Problems solved by technology

[0003] At present, range hoods on the market generally use AC motors. Although the range hoods using this type of motor have the characteristics of simple structure and low cost, they use a relatively simple way to control the operation of the fan system, that is, directly energize the motor to Stable at a specific speed, there is no special control for this working condition, that is, when the conditions of the air inlet and outlet of the range hood remain unchanged, the working state of the motor will not change, and if the noise or the concentration of oil fume is large at this time, the oil fume The machine will not respond, so the working mode is relatively simple, and adjustments in more complex situations cannot be realized, and the user experience is relatively not humanized.

[0004] In the prior art, the speed of the fan is also adjusted according to the concentration of oil fume, such as the Chinese invention patent "A Oil Smoke Detection Device, Range Hood and Control Method" with the authorized announcement number CN110030595A (application number 201910278952.2), in which the disclosed technology The solution is to control the fan speed according to the oil fume concentration value, but this adjustment of the fan speed is directly aimed at the adjustment of the fan parameters to change the fan speed. However, the range hood is usually set with a fixed fan speed gear. Cannot be adjusted in case of large

Or when the user manually sets the fixed speed, it is impossible to adjust the fan speed according to the change of the oil smoke concentration

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