Intelligent electrically-operated check valve

Abstract

The invention provides an intelligent electrically-operated check valve. The intelligent electrically-operated check valve comprises a check valve support, an air duct, a check valve plate, a magnetic seal ring and an intelligent controller, wherein the air duct is arranged on the check valve support; the check valve plate arranged in the air duct is perpendicular to the axis of the air duct; a pin roll enabling the check valve plate to rotate is arranged in the air duct; the magnetic seal ring fixedly arranged on the inner wall of the air duct consists of two half magnetic seal rings positioned on the upper and lower sides of the check valve plate, and is used for sealing a gap between the check valve plate and the inner cavity of the air duct; the intelligent controller is fixed on the check valve support, is connected with the pin roll through a coupling, and is used for controlling the rotation of the pin roll; micro switch sensors are arranged on the check valve support on two sides of the coupling; the coupling is provided with two mutually perpendicular contacts along the direction perpendicular to the axis of the coupling. The intelligent electrically-operated check valve adopts integrated arrangement, is simple in structure and convenient to use, and prevents a motor from starting at negative pressure or being blocked.

Description

technical field [0001] The invention relates to a kitchen purification device, in particular to an intelligent electric check valve for a kitchen fume exhaust pipe. Background technique [0002] The air outlet of the range hood and the entrance of the public flue are generally equipped with a check valve, but after a period of use, the oil fume will be poured back; and it will be accompanied by poor smoke exhaust. The reasons mainly include the following aspects: [0003] Reason 1: Except for a small part of the check valve on the range hood and the oil fume check valve sold independently, a spring is added to the valve plate to help the valve close, most of them rely on the wind force of the range hood to open and the valve plate to close by its own weight. In order to ensure that the wind force of the range hood can open the check valve, the weight of the valve plate or the spring force should not be too large, which limits the force to close the valve. However, it is an u...

AI Technical Summary

Problems solved by technology

In addition, because the air volume in the flue is determined by the number of households that are running at the same time, oil fume backflow sometimes occurs

[0006] Reason 4: When the smoke exhaust pressure and air volume of the range hood upstairs are large, the air curtain effect will be generated, which will increase the local pressure in the downstairs flue, and after the local pressure increases, the pollution in the flue will be pushed from the non-return valve with poor sealing effect. This is the reason for the cooking upstairs and downstairs pouring back

[0007] Reason 5: Although the existing new electric check valve is driven by the motor, the control of the rotation of the motor only depends on the simple circuit or travel switch to control the positive and negative rotation of the motor, lacking its own detection function, strong and weak current isolation function, Anti-interference function and fault alarm function, these defects bring hidden dangers to the safety of users

[0008] Reasons for poor smoke exhaust: The oil scale accumulated on the check valve increases the weight of the valve plate, and the opening resistance of the check valve increases after the valve plate is equipped with springs, and the range hood needs to consume part of the air volume to overcome these resistances; especially when installed in The non-return valves at the common flue openings are all bottom-opening, and the valves cannot be fully opened to reduce the ventilation cross-section, which will cause the exhaust air volume to attenuate and the smoke exhaust to be poor

Or the valve plate is stuck, so that the exhaust air of the range hood cannot be blown, and the oil fume cannot be exhausted.

[0009] Based on the above background, the present invention provides an intelligent electric check valve, which is different from the traditional design that only relies on a simple circuit or travel switch to control the rotation of the motor. Rotation, so that the motor can overcome the attraction of the magnetic seal ring and the adhesion of oil dirt to accurately drive the check valve to open to a phase difference of 90°, which completely solves the problem that the valve of the traditional check valve with a motor cannot be opened due to excessive rotation. The problem that it cannot be fully opened, combined with the self-locking of the motor and the principle that the valve is always attracted by the magnetic seal ring to keep the air duct closed when the check valve is closed, prevents negative pressure from opening. It is currently the only one that uses an intelligent control chip. A non-return valve that controls the opening of the motor in real time with the micro switch sensor, and combines the magnetic sealing ring to attract the valve plate to close in both directions

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