An exhaust fan for a range hood

By designing an automatically closing louver structure and air guide ring in the range hood exhaust fan, the problem of flying insects and dust entering the traditional range hood exhaust fan when it is not in operation is solved, realizing the functions of effective exhaust and oil recovery, and improving the practicality of the equipment.

CN224550459UActive Publication Date: 2026-07-24ZHEJIANG YUNJI ELECTRICAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG YUNJI ELECTRICAL TECH CO LTD
Filing Date
2025-08-12
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

When traditional range hood exhaust fans are not in operation, the air inlet and outlet are open, allowing flying insects or dust to easily enter and affecting the equipment's performance.

Method used

Design a range hood exhaust fan with a louver structure that automatically closes the air outlet. When the fan blades are working, the louvers open to allow air to flow out, and when the fan blades are not working, the louvers automatically close to prevent flying insects or dust from entering. It is also equipped with an air guide ring and an oil collection box to achieve airflow guidance and oil recovery.

Benefits of technology

It achieves effective ventilation during operation and prevents flying insects and dust from entering when not in operation. It has complete functions, strong practicality, and also has an oil recovery function.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224550459U_ABST
    Figure CN224550459U_ABST
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Abstract

The utility model discloses an exhaust fan of range hood, including exhaust fan front cover and exhaust fan back seat, is equipped with the circular air inlet on exhaust fan front cover, is equipped with the fan blade in circular air inlet, is equipped with the fan bracket on exhaust fan back seat, is equipped with the fan on fan bracket, the fan blade is equipped on the output shaft of fan, is equipped with the square air outlet on exhaust fan back seat, is equipped with a column of louvers that arrange up and down in square air outlet, and the left and right ends of every louver are equipped with the shaft that rotates and connects on exhaust fan back seat, and the louver rotates relative to exhaust fan back seat, and the left end and / or right end of every louver is equipped with fixed connecting rod, still including one as up and down extension movable connecting rod, and one end of fixed connecting rod is not connected with louver and is hinged on movable connecting rod, and the louver closes square air outlet under natural state. The exhaust fan of range hood is not working, and the air outlet is automatically closed, can prevent the fly or dust from entering, and the overall function is perfect, and the practicality is strong.
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