Magnetic assist exhaust fan

Abstract

The invention relates to a magnetic-assisted exhaust fan in the field of electrical appliances. The magnetic-assisted exhaust fan comprises a shell, a wind wheel assembly and a wind wheel fixing frame, wherein a louver capable of opening and closing an exhaust opening are arranged on the exhaust opening; the louver comprises driving blades located at the middle end and driven blades located at the upper and lower ends, and the driving blades are connected with the driven blades through linkage rods; a magnetic-assisted mechanism is also arranged inside an exhaust pipe; and the magnetic-assisted mechanism comprises a magnetic-assisted platform, a first magnetic part and a second magnetic part. Due to the arrangement of the magnetic-assisted mechanism, the magnetic-assisted exhaust fan has a magnetic attraction force, so that the magnetic-assisted exhaust fan can be movably started to the maximum ventilating state because an acting force jointly generated by airflow blast capacity and the magnetic attraction force is larger than the acting force of the self-gravity of the louver when the exhaust fan normally works, and the louver can be automatically closed because the acting force of the self-gravity of the louver is larger than the acting force of the magnetic attraction force when the exhaust fan stops working; and when a motor works, the louver can be rapidly opened to the optimal state, and the noise is particularly low when the louver is opened to the optimal state.

Description

technical field [0001] The invention relates to the field of electrical appliances, in particular to an exhaust electrical appliance, in particular to a magnetic assist exhaust fan. Background technique [0002] Most of the existing exhaust fans are equipped with louver doors to prevent external impurities from entering the room. The louver door structure and existing defects of the existing exhaust fans are as follows: 1) The structure of the electric louver door requires an independent motor. The motor drives the louver door to open and close. This structure needs to be driven by a power supply. The overall structure is complex, easy to damage, high cost, and consumes a lot of power; 2) Front louver door structure, the louver door is set on the front door, Affect the blowing volume, and affect the appearance of the exhaust fan; 3) The spring louver door structure is assisted by the spring rebound force to close, and at the same time, the louver door is opened by the motor ...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing exhaust fans are equipped with louver doors to prevent external impurities from entering the room. The louver door structure and existing defects of the existing exhaust fans are as follows: 1) The structure of the electric louver door requires an independent motor. The motor drives the louver door to open and close. This structure needs to be driven by a power supply. The overall structure is complex, easy to damage, high cost, and consumes a lot of power; 2) Front louver door structure, the louver door is set on the front door, Affect the blowing volume, and affect the appearance of the exhaust fan; 3) The spring louver door structure is assisted by the spring rebound force to close, and at the same time, the louver door is opened by the motor blowing volume. This structure requires high motor power and blowing volume, resulting in The noise is loud, and the spring is easy to rust, and the surface of the spring and the louver door is easy to accumulate dust. After the spring is pressed for a long time, the elastic force will decay seriously. If the elastic force is insufficient, the louver door cannot be completely closed, and the control will fail quickly. , the failure rate is high; 4) Multiple louver door structures, the overall structure is lighter, and can be blown open by the motor without any power-assisted structure. Effectively prevent foreign objects from entering the exhaust fan, the overall barrier effect is small, and cannot withstand external forces, and this structure is inconvenient to install, easy to damage, and very not durable

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