Range hood

Abstract

The invention provides a range hood. The range hood comprises an up-and-down driving motor and a control circuit, wherein the up-and-down driving motor is used for controlling an electric push rod, which drives an air inlet and smoke-collecting cover to move, according to a signal from the control circuit; the control circuit comprises a pressure sensor and a controller; the controller is used for transmitting an ascending signal to the up-and-down driving motor to enable the electric push rod to drive the air inlet and smoke-collecting cover to ascend, or transmitting a descending signal to the up-and-down driving motor to enable the electric push rod to drive the air inlet and smoke-collecting cover to descend; when the controller transmits the ascending signal or the descending signal to the up-and-down driving motor, the pressure sensor starts; the pressure sensor is used for sensing pressure when starting and transmitting the sensed pressure value to the controller; and when the difference of the pressure values which are received by the controller from the pressure sensor continuously for twice is more than a preset threshold value, the controller transmits a signal opposite to the signal, which is transmitted to the up-and-down driving motor previously, to the up-and-down driving motor and enables the opposite signal to continue for the preset time.

Description

technical field [0001] The invention relates to the field of household electrical appliances, and more specifically, the invention relates to a range hood. Background technique [0002] At present, most range hoods on the market are basically installed on the top or side of the stove, which takes up a lot of space in the kitchen. In order to solve the above problems, Chinese Patent No. 200820004811.9 proposes "a lower range hood". In this technical solution, the lower range hood includes: double-cooker burning appliances, automatic lifting side rear shielded range hood, single-hanging fan lower device, sound playback system, universal wheels, disinfection room and refrigerator . The automatic lifting side rear shielded range fume extraction device includes a multi-speed adjustable semicircular suction screen, a guiding mechanism and a drive motor unit; the multi-speed adjustable semicircular suction screen is adjustable from 1 to 4 gears; the suction screen The vertical d...

AI Technical Summary

Problems solved by technology

[0003] But it has the following deficiencies: 1, the vertical direction of the suction screen of the above-mentioned lower range hood is semicircular, and the ring stands on the rear half side of the burner pan, which makes the lifting of the suction screen inconvenient, and the appearance is also unsatisfactory

2. Since the suction screen is too close to the stove, it is inconvenient to operate the cooking

[0005] However, the above-mentioned prior art does not disclose how to specifically realize the anti-pinch function of the lifting range hood

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