Small size dust collector motor cabin with noise reduction function

Abstract

The invention discloses a small size dust collection motor cabin with a noise reduction function. The small size dust collection motor cabin with the noise reduction function comprises a motor cover, a motor assembly, a front-located filter, a motor shell, an exhaust filter element and a lower portion bottom plate, wherein a suction inlet is formed in the top of the motor cover, an exhaust cavity is formed between the motor shell and the lower portion bottom plate and in the outer side of the exhaust filter element, and a wide band silencer which is formed by an L-type noise reduction cavity and a cylindrical noise reduction cavity is arranged on the exhaust cavity portion of the lower portion bottom plate. According to the small size dust collection motor cabin with the noise reduction function, the size of the space occupation of the L-type noise reduction cavity is small, the limited space of the motor shell can be utilized reasonably, the noise reduction effect to single frequency noise is good, and the small size dust collection motor cabin with the noise reduction function has the noise reduction function for the noise with frequency from 4000 Hz to 10,000 Hz. In addition, the partial space formed by the geometrical shape of the motor shell is sufficiently utilized, a partition plate type silencer is additionally arranged on the motor shell wall, and by using the contraction noise reduction cavity formed by partition plates, the value of the sound pressure which can be reduced is 7 dB, and the value of the overall sound pressure is reduced by 3.8 dB.

Description

technical field [0001] The invention relates to a vacuum cleaner, in particular to a motor of the vacuum cleaner. Background technique [0002] Generally speaking, a vacuum cleaner is a device that generates suction through a fan motor installed inside the body, and uses the above suction to suck in dust. A vacuum cleaner is an electrical appliance that cleans dust on the ground or carpets through the above-mentioned process. The vacuum cleaner motor is the heart of the vacuum cleaner. The main types of vacuum cleaner motors are: dry vacuum cleaner motor, wet and dry vacuum cleaner motor. The vacuum cleaner motor is composed of two parts: the motor part and the fan part. Since the vacuum cleaner motor has high requirements on the speed, generally at 20,000-30,000 rpm, the motor is mainly a series-excited motor, also known as a series-excited motor. The series-wound motor is a series-connected stator excitation winding and armature (rotor) winding, which can pass through bo...

AI Technical Summary

Problems solved by technology

[0006] With the continuous shrinking of the overall volume of the vacuum cleaner, the motor casing is also reduced. Therefore, there is currently no noise reduction design for small-sized motors, such as figure 1 , where the direction indicated by the arrow is the direction of the airflow (that is, the propagation of sound waves) when the motor is driven

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