Noise elimination structure of vacuum cleaner

Abstract

The invention provides a muffler structure of a vacuum dust cleaner, comprising an upper casing having an integrally-molded groove with a cover for receiving a liner, wherein the bottom of the groove is provided with a plurality of air outlets, and the opening area of each air outlet is less than or equal to one quarter of the wavelength corresponding to the vibration frequency of the motor or the fan; the side surface on the rear end of the casing is provided with a plurality of air outlets, and the opening area of each air outlet is less than or equal to one quarter of the wavelength corresponding to the vibration frequency of the motor or the fan; the liner in the groove is arranged movably, and can efficiently absorb the high-frequency noise caused by vibration of the motor and the fan, improve the sound quality of the vacuum dust cleaner in operation, and reduce the total noise of the vacuum dust cleaner, so that the noise of the vacuum dust cleaner in operation can be controlled within about 70dB at standard measuring point.

Description

technical field [0001] The invention relates to a vacuum cleaner, in particular to a noise reduction structure of the vacuum cleaner which is arranged on the top of the vacuum cleaner, effectively reduces the high-frequency squeal generated by the motor and the fan during operation, and improves the sound quality of the vacuum cleaner during operation. Background technique [0002] A vacuum cleaner is a device that sucks dust. It generates a strong suction in the body of the vacuum cleaner. Under the action of the strong suction, the dust accumulated in the area or part that needs to be cleaned is forcibly inhaled through the suction nozzle. Because it absorbs dust more Thorough, high efficiency, and can protect the environment. Therefore, in recent years, vacuum cleaners have been widely used by people, especially in cleaning work in general homes, offices, conference halls, etc., especially for cleaning carpets, sofas, In the cleaning operation of the corner of the wall an...

AI Technical Summary

Problems solved by technology

The pad body 122 is made of sound-absorbing materials. This design structure can reduce the exhaust noise generated in the exhaust part to a certain extent, and reduce the noise near the vacuum cleaner body, but it cannot effectively reduce the noise as a whole. The noise when the vacuum cleaner is working, under normal circumstances, measured by the sound level meter, the standard measuring point of the vacuum cleaner (that is, 1 meter directly above the vacuum cleaner body), the noise is about 75dB

[0008] It can be seen from the above that the existing components and structures for reducing noise

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