An Exhaust Fan Based on Air Splitting to Reduce Noise

Abstract

The invention discloses an exhaust fan reducing noise based on air flow dividing. The exhaust fan structurally comprises an integrated fan frame, a panel and wind wheel fan blades. The integrated fanframe is in buckling connection with the panel, and the integrated fan frame and the panel are combined to form a rectangular structure and an inner cavity. A motor is mounted in the middle of the inner cavity formed by the integrated fan frame and the panel. The motor is in shaft connection with the wind wheel fan blades. The wind wheel fan blades are of a hood structure. According to the exhaustfan provided by the invention, airflow, impacting the air, of the wind wheel fan blades flows out in three portions, wherein two flowing portions are silenced in the flowing process and then flow tothe outside of a room by following a middle main airflow portion along with an air pipe, that is, operating of the middle airflow portion is not changed, and the airflow portions at the two ends are silenced and flow out by following the middle airflow portion; and the sizes of the fan blades for flowing the airflow portions at the two ends are small, the flowing noise is low, then silencing is performed to further reduce the noise, accordingly, people only feel the noise of part of the airflow impacting the fan blades while powerful air exhausting of the exhaust fan is achieved, and therefore, part of the noise is lowered.

Description

technical field [0001] The invention relates to the field of sanitary products, in particular to an exhaust fan for reducing noise based on air splitting. Background technique [0002] The air circulation in the bathroom is very important, which is related to health and hygiene. People use exhaust fans to eliminate the smelly air in exchange for healthy and fresh air. [0003] The loud exhaust sound of the existing exhaust fan is a normal phenomenon. It does not need to be repaired, but it also affects the indoor acoustic environment. A large part of the noise of the existing exhaust fan is caused by the fan blades and rotor blades when the motor rotates. Part of the noise generated by periodic impact on the air; due to the excessive distance increases the exhaust resistance and affects the exhaust effect, the biggest function of the exhaust fan in the bathroom is to discharge the odor. In order to achieve the exhaust effect, it is generally closer to the toilet , It also m...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to overcome the deficiencies of the prior art, and provide an exhaust fan based on air splitting to reduce noise, so as to solve the problem that the loud exhaust sound of the exhaust fan is a normal phenomenon, and it does not need to be repaired, but it also affects indoor Acoustic environment, a large part of the noise of the existing exhaust fan is the noise generated by the protruding parts of the fan blades and rotor blades hitting the air periodically when the motor rotates; due to the increase of the exhaust resistance due to the excessive distance, the exhaust effect is affected. When using the exhaust fan in the bathroom, the biggest function is to discharge odor. In order to achieve the exhaust effect, it is generally closer to the toilet, and the outlet of the exhaust fan is closer to people, and the noise people hear is relatively loud.

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