Electric control air-return-resistant check valve for exhaust hood

Abstract

The invention discloses an electric control air-return-resistant check valve for an exhaust hood, and aims to ensure that a valve plate can be opened and closed automatically, effectively solve the problem about air loss of the exhaust hood in an oil fume emission process, and then improve the oil fume suction efficiency. The electric control air-return-resistant check valve comprises a check valve body, wherein the check valve body comprises a check valve main sleeve, the valve plate, a motor seat and a motor; the two ends of the check valve main sleeve are open; the valve plate is arranged in the check valve main sleeve by rotating a valve plate rotation shaft; the motor seat is arranged on the outer side surface of the check valve main sleeve; the motor is arranged on the motor seat; a motor shaft of the motor is connected with the valve plate rotation shaft through a crankshaft, and coaxially arranged with the valve plate rotation shaft; and a micro switch matched with the crankshaft is also arranged on the motor seat.

Description

technical field [0001] The invention relates to the field of range hoods, in particular to an electric control anti-backflow check valve for range hoods. Background technique [0002] In the prior art, the valve plates of the anti-return check valves used in range hoods are mostly opened passively; when the anti-return check valves are closed, they are kept closed by the gravity of the valve plates. The exhaust air pressure of the range hood blows it away, so that the oil fume is discharged to the public flue or outside. At present, the closing state of this kind of anti-return air check valve is unstable. When it is closed, it is affected by the flue gas flow, and the valve plate sometimes does not close tightly (the valve plate is opened at a certain angle), causing the problem of smoke and smell; , Relying on the exhaust air pressure of the range hood to open the valve plate, resulting in a certain loss of air volume. Contents of the invention [0003] The purpose of ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a valve that can be automatically opened and closed, which can effectively avoid the problem of air volume loss caused by the range hood during the range hood exhaust process, thereby improving the efficiency of the range hood Electric control anti-return check valve for range hood

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