Full-automatic continuous adjustable extractor hood adopting capacitance-type sensor

Abstract

The invention discloses a full-automatic continuous adjustable extractor hood adopting a capacitance-type sensor. The full-automatic continuous adjustable extractor hood comprises an extractor hood shell, and a capacitance-type sensor, a fan and a speed control circuit which are arranged in the extractor hood shell, wherein the capacitance-type sensor comprises a body base which is internally provided with a first cavity and a second cavity, and a sensor shell matched with the body base; the bottoms of the first cavity and the second cavity are communicated, liquid insulating media are filled inside the first cavity and the second cavity; the height of the first cavity is more than that of the second cavity, the liquid level sectional area of the liquid insulating media is less than that of the second cavity; the first cavity is communicated with atmosphere through an atmosphere inlet in the top, two parallel opposite electrode plates are arranged inside the first cavity along a height direction; the second cavity is communicated with a public flue through a flue gas inlet in the top; and the electrode plates are used as output ends of the capacitance-type sensor and connected with the input end of the speed control circuit, the output end of the speed control circuit is connected with a motor, and the output end of the fan is communicated with the public flue.

Description

technical field [0001] The invention relates to a range hood, in particular to a fully automatic continuously adjustable range hood using a capacitive sensor. Background technique [0002] Nowadays, range hoods in high-rise residential buildings mostly adopt the "smoke pipe" design, that is, more than a dozen users share a common flue. However, during the peak period of use of range hoods, a large amount of oily fumes are discharged into the public flue at the same time, and these oily fumes will cause blockage after long-distance movement in the flue, so that the internal pressure of the public flue increases, making the smoke exhaust effect bad. [0003] In the case of poor smoke exhaust effect, it is necessary that the exhaust air volume of the range hood can automatically adapt to the pressure change of the public flue, but the speed of the existing range hood is often controlled by the user and cannot be adjusted in time. In addition, the adjustment gear of the range ...

AI Technical Summary

Problems solved by technology

This kind of sensor cannot be used in oil fume environment. If the surface of the elastic sensitive element is damaged or stained with oil fume, it will not work normally, resulting in functional failure.

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