Handheld wireless dust collector with silencing cover

Abstract

The utility model relates to a handheld wireless dust collector with a silencing cover, in particular to a handheld wireless dust collector with a silencing cover. Comprising a main machine handle assembly, a motor, silencing cotton, a main machine rear end cover, a rear filter element and damping silica gel, a shell formed by a main machine front end cover and the main machine rear end cover on the main machine handle assembly fixes the motor in a space formed by the main machine front end cover and the main machine rear end cover, the damping silica gel wraps the outer layer of the motor, and the rear filter element is fixedly embedded outside the main machine rear end cover; the noise reduction device further comprises a noise reduction cover, the inner ring of the large end of the horn-shaped noise reduction cover is tightly pressed on the outer layer of the damping silica gel, the other end of the noise reduction cover is tightly pressed on the rear end cover of the main machine, and the outer side of the noise reduction device is sleeved with noise absorption cotton. According to the utility model, the horn-shaped silencing cover is additionally arranged on the basis of the original structure, high-pressure gas flows out of the motor and then passes through the air guide ribs of the silencing cover and the through holes in the side wall of the rear end of the silencing cover, so that the high-pressure gas is uniformly distributed, sound waves interfere with air in a cavity between the through holes and the shell, and a remarkable silencing effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of noise elimination and noise reduction, in particular to a handheld wireless dust collector with a noise elimination cover. BACKGROUND

[0002] In order to keep the production and living environment clean, especially in the place with special environment requirements, the dust collector is often used; the working principle of the dust collector is to use the motor to drive the blade to rotate at high speed to generate air negative pressure in the sealed shell to suck up the dust. The dust collector is mainly composed of three parts of dust generation, dust suction and dust filtration. The mainstream handheld wireless dust collector on the market adopts the motor covered by silica gel, places the sound absorption material beside the noise source and designs the assembly to be relatively compact to play the auxiliary noise reduction role from multiple directions.

[0003] However, the sound absorption material arranged beside the noise source only has the sound absorption effect, cannot effectively remove the sound waves of each frequency band in the noise and cannot obviously reduce the noise, which seriously pollutes the noise and affects the human health. In the handheld wireless dust collector with compact space, the sound absorption material placed beside the noise source will affect the exhaust of the air outlet and the working efficiency of the fan, which will reduce the cleaning capacity and affect the experience effect of the user. SUMMARY

[0004] The utility model aims at overcoming the defects of the prior art and provides a handheld wireless dust collector with a noise elimination cover which can effectively reduce the noise without affecting the structure of the product.

[0005] The utility model adopts the following technical scheme:

[0006] A dust collector with a noise elimination cover, which comprises a host handle assembly, a motor, noise elimination cotton, a host rear end cover, a rear filter element and shock-absorbing silica gel. The outer shell formed by the host front end cover on the host handle assembly and the host rear end cover fixes the motor in the space formed by the two. The shock-absorbing silica gel is wrapped outside the motor. The rear filter element is embedded in the host rear end cover. The utility model also comprises a noise elimination cover. The inner ring of the large end of the horn-shaped noise elimination cover is tightly pressed against the outer layer of the shock-absorbing silica gel. The other end is tightly pressed against the host rear end cover. The noise elimination cover is wrapped with noise elimination cotton on the outside.

[0007] The sidewall of the small end of the noise elimination cover is uniformly provided with through holes.

[0008] The noise elimination cover is a symmetrical polygon.

[0009] The noise elimination cover is provided with a protruding air guide rib at the joint of each polygon.

[0010] The through hole is located between the two protruding air guide ribs.

[0011] The utility model discloses a dust catcher with a sound-absorbing cover, which comprises a main handle assembly 1, a motor 2, sound-absorbing cotton 4, a main rear end cover 5, a rear filter element 6 and shock-absorbing silica gel 7. BRIEF DESCRIPTION OF DRAWINGS

[0012] BRIEF DESCRIPTION OF DRAWINGS Fig. 1 It is the main sectional view of the utility model;

[0013] BRIEF DESCRIPTION OF DRAWINGS Fig. 2 It is the three-dimensional exploded view of the utility model;

[0014] BRIEF DESCRIPTION OF DRAWINGS Fig. 3 It is the three-dimensional view of the sound-absorbing cover;

[0015] BRIEF DESCRIPTION OF DRAWINGS Fig. 4 It is the main sectional view of the sound-absorbing cover. DETAILED DESCRIPTION

[0016] BRIEF DESCRIPTION OF DRAWINGS Figs. 1-4 A dust catcher with a sound-absorbing cover, which comprises a main handle assembly 1, a motor 2, sound-absorbing cotton 4, a main rear end cover 5, a rear filter element 6 and shock-absorbing silica gel 7.

[0017] The side wall of the small end of the sound-absorbing cover 3 is uniformly provided with through holes 31.

[0018] The sound-absorbing cover 3 is a symmetrical polygon.

[0019] The sound-absorbing cover 3 is provided with a convex air guide rib 32 at the butt joint of each polygon.

[0020] The through hole 31 is located between the two convex air guide ribs 32.

[0021] When the utility model is applied, high-speed wind enters the sound-absorbing cover 3 from the air outlet of the motor 2, enters the rear filter element 6 from the rear end cover 5 of the main machine, and is discharged through the air outlet of the rear filter element 6; high-pressure gas flows out from the motor 2, passes through the air guide rib 32 of the sound-absorbing cover 3, and is uniformly distributed, thereby reducing the wind noise generated by exhaust; when sound passes through the rear end side wall perforation 31 of the sound-absorbing cover 3, the sound wave interferes with the air in the cavity between the rear end side wall of the sound-absorbing cover 3 and the shell, part of the sound energy is converted into heat energy when the sound wave interferes, the sound-absorbing cotton 4 is arranged between the cavity and the shell, the air friction at the hole neck of the sound-absorbing cover 3 is significantly increased, and part of the noise can be obviously reduced; then, the airflow continues to flow to the inner wall of the shell, and the noise can be further reduced, the sound-absorbing cover 3 after optimization reduces the wide-frequency wind noise of 4KHz-8KHz, and has a remarkable sound-absorbing effect;

[0022] By setting the distance of the cavity depth of the perforated plate sound-absorbing cover 3, the position of the resonance sound absorption peak can be effectively improved, noise and machine inherent frequency resonance can be avoided, and the sound absorption effect can be further optimized.

[0023] The sound-absorbing cover 3 is prepared by using an elastic material such as plastic to prepare a shell and is fixed by using a soft connection with the main machine, so that the cost is reduced, the cylinder has great elasticity and buffering performance, and the sound-absorbing cover 3 in the utility model can not only eliminate noise but also reduce stress and strain in the device and machine vibration and noise caused by vibration.

[0024] The sound-absorbing cover 3 preferably has a special hexagonal mold structure, the number of through holes 31 is increased under the condition of limited space, and the sound absorption and noise reduction effect is effectively improved.

Claims

1. A handheld cordless vacuum cleaner with a noise-absorbing cover, comprising a main unit handle assembly, a motor, noise-absorbing cotton, a main unit rear end cover, a rear filter, and shock-absorbing silicone, wherein the main unit front end cover and the main unit rear end cover on the main unit handle assembly form a shell that fixes the motor within the space formed by the two, the shock-absorbing silicone covers the outer layer of the motor, and the rear filter is embedded outside the main unit rear end cover; characterized in that: It also includes a soundproof cover, which is horn-shaped. The inner ring of the larger end of the soundproof cover is pressed tightly against the outer layer of the shock-absorbing silicone, and the other end is pressed tightly against the rear cover of the main unit. The outside of the soundproof cover is covered with sound-absorbing cotton.

2. A handheld cordless vacuum cleaner with a sound-absorbing cover according to claim 1, characterized in that: The side wall of the small end of the soundproof cover is evenly distributed with through holes.

3. A handheld cordless vacuum cleaner with a sound-absorbing cover according to claim 1, characterized in that: The soundproof cover is a symmetrical polygon.

4. A handheld cordless vacuum cleaner with a sound-absorbing cover according to claim 1, characterized in that: The soundproof cover has raised air guide ribs at the joints of each polygon.

5. A handheld cordless vacuum cleaner with a noise-absorbing cover according to claim 2, characterized in that: The through hole is located between two raised air guide ribs.

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