Noise reduction device and cloth cleaning machine

Abstract

The utility model discloses a noise reduction device and a cloth cleaning machine, the noise reduction device is used for being connected with the cloth cleaning machine, the noise reduction device comprises a base body, the base body is connected with the cloth cleaning machine, the base body is provided with air inlet holes and a noise reduction air channel, the air inlet holes are used for communicating an air outlet of a fan assembly with the air inlet end of the noise reduction air channel, the number of the air inlet holes is multiple, and the noise reduction air channel is communicated with the air inlet end of the fan assembly. And the air inlet hole is used for segmenting sound waves transmitted from the air outlet of the fan assembly. According to the noise reduction device, after the draught fan assembly of the fabric cleaning machine makes noise, the noise is exhausted through the air outlet along with air flow and then enters the noise reduction air channel after being divided by the multiple air inlet holes to reduce sound wave energy, and in the process that sound waves pass through the noise reduction air channel, the inner wall of the noise reduction air channel collides with the sound waves; and finally, the sound waves are spread to the outside through the air outlet end of the noise reduction air channel along with the air flow, the noise can be remarkably reduced by combining the multiple air inlet holes and the noise reduction air channel, and the noise reduction effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field especially, relate to a noise reduction device and cloth cleaning machine. BACKGROUND

[0002] With the development of science and technology and the improvement of people's living standards, cloth cleaning machine gradually gets the recognition of people with its better cleaning effect on cloth and more convenient operation. The cloth cleaning machine is provided with a fan assembly, which realizes the suction of gas, liquid and solid mixture on the cloth through the work of the fan assembly, and realizes the cleaning function of the cloth cleaning machine. Among them, the fan assembly will produce a lot of noise in the working process, therefore, in the process of manufacturer design, noise reduction is one of the design points.

[0003] The utility model discloses a kind of cloth cleaning machine's fan assembly and cloth cleaning machine of Chinese utility model patent publication No.CN217378343U, wherein the fan assembly of cloth cleaning machine can include: sound-absorbing piece, sound-absorbing piece is set on multiple reinforcing ribs. Specifically, sound-absorbing piece is set on multiple reinforcing ribs, sound-absorbing piece can be sound-absorbing sponge, sound-absorbing sponge not only will not affect the flow of airflow, but also can sound-absorbing inside fan assembly, reach the effect of noise reduction. But in actual use, the noise reduction effect is not ideal, the reason is that its way of increasing sound-absorbing sponge is too simple, purely rely on sound-absorbing sponge noise reduction effect is very limited, therefore, the existing noise reduction device needs to be further improved and optimized. UTILITY MODEL CONTENTS

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the utility model provides a noise reduction device and cloth cleaning machine.

[0005] The utility model is realized through the following technical schemes:

[0006] The utility model provides a noise reduction device, the noise reduction device is used for being connected with cloth cleaning machine, and it includes:

[0007] Base body, the base body is connected with cloth cleaning machine, the base body has air inlet and noise reduction air duct, the air inlet is used for connecting the air outlet of the fan assembly of cloth cleaning machine;

[0008] Among them, the number of air inlet is multiple, multiple air inlets are respectively communicated with the air inlet end of noise reduction air duct, the air inlet is used for dividing the sound wave that the air outlet of fan assembly spreads, and the noise reduction air duct is used for reducing the sound wave that the air inlet spreads.

[0009] The noise reduction device of the utility model, after the fan assembly of cloth cleaning machine sends out noise, noise flows through the air outlet and is discharged, then enters the noise reduction air duct after being divided by multiple air inlets to reduce sound wave energy, the inner wall of the noise reduction air duct collides with sound wave in the process of sound wave passing through the noise reduction air duct, can play the role of further reducing sound wave energy, finally, sound wave spreads to the outside through the air outlet end of the noise reduction air duct, wherein, in combination with multiple air inlets and noise reduction air duct, noise can be significantly reduced, and the noise reduction effect is more excellent.

[0010] In an embodiment, the base body further has a plurality of air outlet holes, the plurality of air outlet holes are in communication with the air outlet end of the noise reduction air duct, and the air outlet holes are used for dividing residual sound waves propagated from the air outlet end of the noise reduction air duct. Because the plurality of air outlet holes can divide the residual sound waves, the sound wave energy can be further reduced. Therefore, in combination with the plurality of air inlets, the noise reduction air duct and the plurality of air outlet holes, the noise can be significantly reduced, and the noise reduction effect is more excellent.

[0011] In an embodiment, the noise reduction air duct is arranged around the air outlet hole to prolong the length of the noise reduction air duct, so that the contact area between the inner wall of the noise reduction air duct and the sound wave can be increased, thereby further reducing the sound wave energy and improving the noise reduction effect.

[0012] In an embodiment, the noise reduction air duct comprises:

[0013] An air inlet section, an air inlet end of the air inlet section is in communication with the air inlet hole;

[0014] An air outlet section, the air outlet section and the air inlet section are respectively arranged on two sides of the plurality of air outlet holes along a first direction, and an air outlet end of the air outlet section is in communication with the air outlet hole; and

[0015] Two extension sections, the two extension sections are respectively arranged on two sides of the plurality of air outlet holes along a second direction, the second direction is perpendicular to the first direction, the extension section is in communication with the air inlet end of the air inlet section and the air inlet end of the air outlet section, in this way, the air flow discharged by the fan assembly is divided into two parts after entering the air inlet section through the air inlet hole, one part flows to one of the extension sections, and the other part flows to the other extension section, and finally, the air flow is collected through the air outlet section and flows to the air outlet hole. This noise reduction air duct is bent by 180°, can disturb the air flow, and can slow down the propagation speed of the noise, and the length of the noise reduction air duct is longer, and the contact area between the inner wall of the noise reduction air duct and the sound wave can be further increased, thereby further reducing the sound wave energy and improving the noise reduction effect.

[0016] In an embodiment, a first sound absorbing member is arranged in the noise reduction air duct, the first sound absorbing member is used for air flow and absorbs sound wave energy, so as to further improve the noise reduction effect.

[0017] In one embodiment, the first sound-absorbing member is detachably arranged in the noise reduction air duct.

[0018] The base body has an opening communicating with the noise reduction air duct, and the opening is used for the first sound-absorbing member to enter or exit the noise reduction air duct.

[0019] The noise reduction device further comprises a cover movably arranged on the base body, and the cover is used for opening or closing the opening. Since the first sound-absorbing member is detachably arranged in the noise reduction air duct, the first sound-absorbing member can be disassembled, and in the case that the sound-absorbing holes on the first sound-absorbing member are blocked, the first sound-absorbing member can be taken out by opening the cover, so as to replace the first sound-absorbing member or facilitate cleaning of the first sound-absorbing member, thereby avoiding that the sound-absorbing holes of the first sound-absorbing member are blocked after long-time use, and affecting the exhaust of the fan assembly and noise reduction.

[0020] In one embodiment, the first sound-absorbing member is a structure made of sponge material. The first sound-absorbing member made of sponge material has a porous structure, can effectively absorb sound wave energy, and has better noise reduction effect. Meanwhile, the first sound-absorbing member made of sponge material can filter the exhaust of the fan assembly, so that the exhaust holes discharge clean air, and pollution to the surrounding environment is avoided.

[0021] In one embodiment, on the basis of the structure made of sponge material, the first sound-absorbing member is clamped between the cover and the inner wall of the noise reduction air duct, so that the cover and the inner wall of the noise reduction air duct easily extrude the first sound-absorbing member, and the first sound-absorbing member is easily fixed in the noise reduction air duct, and the structure is simple and practical.

[0022] In one embodiment, the base body is provided with at least two sound insulation bodies, and the sound insulation bodies are arranged around the noise reduction air duct. The at least two sound insulation bodies are arranged at intervals, so as to play a sound insulation role, prevent noise in the noise reduction air duct from spreading to the outside, and further improve the noise reduction effect.

[0023] In one embodiment, a second sound-absorbing member is arranged between the two adjacent sound insulation bodies, and the second sound-absorbing member is used for absorbing sound wave energy, so as to further improve the noise reduction effect.

[0024] In one embodiment, the base body further has a wind collecting groove, an air inlet end of the wind collecting groove is used for communicating with an air outlet of the fan assembly, and an air outlet end of the wind collecting groove communicates with the air inlet hole. The wind collecting groove can play a role of collecting the exhaust airflow of the fan assembly, so that the exhaust airflow of the fan assembly can flow to the air inlet hole efficiently.

[0025] The utility model also provides a cloth cleaning machine, which comprises:

[0026] A host body;

[0027] a fan assembly arranged in the main body; and

[0028] The noise reduction device has the advantages that the base body and the main body are connected, and the air inlet hole is communicated with the air outlet of the fan assembly.

[0029] The cloth cleaning machine has the advantages that after the fan assembly emits noise, the noise is discharged through the air outlet along with the wind, then enters the noise reduction air duct after being divided by the multiple air inlet holes to reduce the sound wave energy, the inner wall of the noise reduction air duct collides with the sound wave during the process of the sound wave passing through the noise reduction air duct, the sound wave energy can be further reduced, finally the sound wave is transmitted to the outside through the air outlet end of the noise reduction air duct, and the noise can be obviously reduced in combination with the multiple air inlet holes and the noise reduction air duct, and the noise reduction effect is better.

[0030] In an embodiment, the base body is arranged at the bottom of the main body, that is, the base body can be used as the base of the main body, and can play a role in secondary noise reduction, so that the noise generated when the cloth cleaning machine works is further reduced.

[0031] In an embodiment, the base body is connected to the main body in a detachable mode, so that the user can optionally install or not install the noise reduction device, and the use is more flexible and convenient.

[0032] The cloth cleaning machine has the advantages that after the fan assembly emits noise, the noise is discharged through the air outlet along with the wind, then enters the noise reduction air duct after being divided by the multiple air inlet holes to reduce the sound wave energy, the inner wall of the noise reduction air duct collides with the sound wave during the process of the sound wave passing through the noise reduction air duct, the sound wave energy can be further reduced, finally the sound wave is transmitted to the outside through the air outlet end of the noise reduction air duct, and the noise can be obviously reduced in combination with the multiple air inlet holes and the noise reduction air duct, and the noise reduction effect is better.

[0033] The cloth cleaning machine has the advantages that after the fan assembly emits noise, the noise is discharged through the air outlet along with the wind, then enters the noise reduction air duct after being divided by the multiple air inlet holes to reduce the sound wave energy, the inner wall of the noise reduction air duct collides with the sound wave during the process of the sound wave passing through the noise reduction air duct, the sound wave energy can be further reduced, finally the sound wave is transmitted to the outside through the air outlet end of the noise reduction air duct, and the noise can be obviously reduced in combination with the multiple air inlet holes and the noise reduction air duct, and the noise reduction effect is better. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a sectional view of the noise reduction device of the utility model in the A-A direction;

[0035] Figure 2 is a sectional view of the noise reduction device of the utility model;

[0036] Figure 3 is Figure 2 a sectional view of the noise reduction device of the utility model in the A-A direction;

[0037] Figure 4 is an exploded view of the noise reduction device of the utility model;

[0038] Figure 5is a sectional view of the cloth cleaning machine.

[0039] Reference signs

[0040] 1, base; 11, air inlet hole; 12, noise reduction air duct; 121, air inlet section; 122, air outlet section; 123, extension section; 13, air outlet hole; 14, opening; 15, sound insulation body; 16, air collecting groove; 17, upper seat body; 18, lower seat body; 2, first sound absorbing part; 3, cover; 4, main body; 5, fan assembly. DETAILED DESCRIPTION

[0041] In the present specification, the orientation terms such as up, down, left, right, front, back, front face, back face, top, bottom, etc. mentioned or possibly mentioned are defined with respect to the configuration shown in the drawings, and they are relative concepts, and thus, can be changed accordingly depending on different positions and different use states. Therefore, these or other orientation terms should not be interpreted as limiting terms.

[0042] Please refer to Figures 1-4 , a noise reduction device is shown, the noise reduction device is used for being connected with the cloth cleaning machine, and comprises:

[0043] The base 1 is connected with the cloth cleaning machine, and the base 1 has the air inlet hole 11 and the noise reduction air duct 12; the air inlet hole 11 is used for communicating with the air outlet of the fan assembly 5;

[0044] The number of the air inlet holes 11 is multiple, the multiple air inlet holes 11 are respectively communicated with the air inlet ends of the noise reduction air ducts 12, the air inlet hole 11 is used for dividing the sound waves propagated from the air outlet of the fan assembly 5, and the noise reduction air duct 12 is used for reducing the sound waves propagated from the air inlet hole 11.

[0045] The noise reduction device of the utility model, after the fan assembly 5 of the cloth cleaning machine emits noise, the noise is discharged along with the air flow through the air outlet, then enters the noise reduction air duct 12 after being divided by the multiple air inlet holes 11 to reduce the sound wave energy, the inner wall of the noise reduction air duct 12 collides with the sound wave during the process of the sound wave passing through the noise reduction air duct 12, which can further reduce the sound wave energy, finally, the sound wave is propagated to the outside along with the air flow through the air outlet end of the noise reduction air duct 12, wherein, in combination with the multiple air inlet holes 11 and the noise reduction air duct 12, the noise can be significantly reduced, and the noise reduction effect is more excellent.

[0046] Please refer to Figures 2-3In one embodiment, the base 1 further comprises a plurality of exhaust holes 13, which are connected to the outlet end of the noise reduction duct 12. The plurality of exhaust holes 13 are used to segment the residual sound waves propagating from the outlet end of the noise reduction duct 12. Because the plurality of exhaust holes 13 can segment the residual sound waves, the sound wave energy can be further reduced. Therefore, the combination of the plurality of air inlet holes 11, the noise reduction duct 12, and the plurality of exhaust holes 13 can significantly reduce noise, achieving a more effective noise reduction effect.

[0047] See also Figure 3 In one embodiment, the noise reduction air duct 12 is arranged around the exhaust hole 13 to extend the length of the noise reduction air duct 12, which can increase the contact area between the inner wall of the noise reduction air duct 12 and the sound wave, thereby further reducing the energy of the sound wave and achieving better noise reduction effect.

[0048] See also Figure 3 In one embodiment, the noise reduction air duct 12 includes:

[0049] The air inlet section 121, the air inlet end of the air inlet section 121 is connected to the air inlet hole 11;

[0050] The air outlet section 122, the air outlet section 122 and the air inlet section 121 are respectively placed in the plurality of exhaust holes 13 along the first direction (the first direction is Figure 3 The air outlet end of the air outlet section 122 is connected to the exhaust hole 13; and

[0051] Two extension sections 123 are respectively placed on the plurality of exhaust holes 13 along the second direction (the second direction is Figure 3 On both sides of the left and right directions shown), the second direction is perpendicular to the first direction, and the extension section 123 connects the outlet end of the air inlet section 121 and the air inlet end of the air outlet section 122. In this way, the airflow discharged by the fan assembly 5 enters the air inlet section 121 through the air inlet hole 11 and is divided into two sides, that is, part of the airflow flows to one of the extension sections 123, and the other part of the airflow flows to the other extension section 123, and finally flows to the exhaust hole 13 after being gathered through the air outlet section 122. This noise reduction air duct 12 turns back 180°, which can play a turbulent role on the airflow and slow down the propagation speed of the noise. At the same time, this noise reduction air duct 12 is longer and can further increase the contact area between the inner wall of the noise reduction air duct 12 and the sound wave, thereby further reducing the sound wave energy and achieving better noise reduction effect.

[0052] See also Figures 2-4 In one embodiment, a first silencer 2 is provided in the noise reduction air duct 12. The first silencer 2 is used to allow air flow to pass through and absorb sound wave energy to further improve the noise reduction effect.

[0053] See also Figure 2 and Figure 4In an embodiment, the first sound-damping member 2 is detachably arranged in the noise-reducing air duct 12.

[0054] The base 1 has an opening 14 communicating with the noise-reducing air duct 12, and the opening 14 is used for the first sound-damping member 2 to enter or exit the noise-reducing air duct 12.

[0055] The noise-reducing device further comprises a cover 3 movably arranged on the base 1, and the cover 3 is used for opening or closing the opening 14. Since the first sound-damping member 2 is detachably arranged in the noise-reducing air duct 12, the first sound-damping member 2 can be disassembled, and in the case that the sound-damping holes on the first sound-damping member 2 are blocked, the first sound-damping member 2 can be taken out by opening the cover 3, so as to replace the first sound-damping member 2 or facilitate cleaning of the first sound-damping member 2, thereby avoiding that the sound-damping holes of the first sound-damping member 2 are blocked after long-time use, which affects the exhaust of the fan assembly 5 and noise reduction.

[0056] In an embodiment, the first sound-damping member 2 is a structure made of sponge material, and the first sound-damping member 2 made of sponge material is a porous structure, which can effectively absorb sound wave energy and has better noise reduction effect. Meanwhile, the first sound-damping member 2 made of sponge material can filter the exhaust of the fan assembly 5, so that the clean air is discharged from the exhaust hole 13, thereby avoiding pollution to the surrounding environment.

[0057] In an embodiment, on the basis of the first sound-damping member 2 being a structure made of sponge material, the first sound-damping member 2 is clamped between the cover 3 and the inner wall of the noise-reducing air duct 12, so as to facilitate the cover 3 and the inner wall of the noise-reducing air duct 12 to extrude the first sound-damping member 2 and easily fix the first sound-damping member 2 in the noise-reducing air duct 12, thereby having simple and practical structure.

[0058] In an embodiment, on the basis of the first sound-damping member 2 being a structure made of sponge material, the projection area of the first sound-damping member 2 is greater than the projection area of the opening 14, so as to limit the first sound-damping member 2 from separating from the noise-reducing air duct 12. Meanwhile, since the first sound-damping member 2 made of sponge material is easy to deform, the first sound-damping member 2 can be easily made to enter or exit the noise-reducing air duct 12 through the opening 14 by extruding the first sound-damping member 2, thereby facilitating replacement or cleaning of the first sound-damping member 2.

[0059] Of course, in other embodiments, the first sound-damping member 2 can also be a structure made of hard material, as long as it can make the air flow through and absorb sound wave energy to play a noise reduction role.

[0060] In an embodiment, the first sound-damping member 2 is arranged in the air-out section 122, so as to improve the utilization rate of the noise-reducing air duct 12, thereby further improving the noise reduction effect.

[0061] Of course, in other embodiments, the first sound-absorbing member 2 can be arranged at any position of the noise reduction air duct 12 as long as it can absorb sound wave energy.

[0062] Referring to Figure 2 In an embodiment, the base body 1 is provided with at least two soundproof bodies 15, which are arranged around the noise reduction air duct 12 and are arranged at intervals to prevent noise in the noise reduction air duct 12 from spreading to the outside, thereby further improving the noise reduction effect.

[0063] In an embodiment, a second sound-absorbing member (not shown in the figure) is arranged between the two adjacent soundproof bodies 15, which is used to absorb sound wave energy to further improve the noise reduction effect.

[0064] In an embodiment, the second sound-absorbing member is made of sponge material to achieve good sound-absorbing effect and excellent noise reduction effect, and the second sound-absorbing member made of sponge material is more convenient to fix and install due to its deformability.

[0065] Of course, the second sound-absorbing member can also be made of other sound-absorbing materials as long as it can absorb sound.

[0066] Referring to Figures 1-2 In an embodiment, the base body 1 is further provided with a wind collecting groove 16, the air inlet end of the wind collecting groove 16 is communicated with the air outlet of the fan assembly 5, and the air outlet end of the wind collecting groove 16 is communicated with the air inlet hole 11, so that the wind collecting groove 16 can collect the air flow discharged by the fan assembly 5 and make the air flow discharged by the fan assembly 5 flow to the air inlet hole 11 efficiently.

[0067] For convenient installation, referring to Figures 1-4 In an embodiment, the base body 1 comprises:

[0068] an upper seat body 17, which has the wind collecting groove 16 and the air inlet hole 11; and

[0069] a lower seat body 18, which is arranged at the bottom of the upper seat body 17 and surrounds the noise reduction air duct 12 with the upper seat body 17, and has the air outlet hole 13.

[0070] In an embodiment, the upper seat body 17 and the lower seat body 18 can be connected together by a fastening structure such as a screw, a bolt or a rivet, or can be connected together by a buckle structure.

[0071] Referring to Figure 5 , a cloth cleaning machine is shown, which comprises:

[0072] a main body 4, which has an air outlet;

[0073] The fan assembly 5 is arranged in the main body 4.

[0074] The noise reduction device is connected with the main body 4, and the air inlet holes 11 are communicated with the air outlet of the fan assembly 5.

[0075] The cloth cleaning machine has the noise reduction device, and after the fan assembly 5 generates noise, the noise is discharged through the air outlet, then enters the noise reduction air duct 12 after being divided by the multiple air inlet holes 11 to reduce the sound wave energy, the inner wall of the noise reduction air duct 12 collides with the sound wave during the sound wave passing through the noise reduction air duct 12, the sound wave energy is further reduced, finally the sound wave is transmitted to the outside through the air outlet end of the noise reduction air duct 12, and the noise can be significantly reduced by combining the multiple air inlet holes 11 and the noise reduction air duct 12.

[0076] In an embodiment, the base body 1 is detachably connected with the main body 4, so that the user can optionally install or not install the noise reduction device, and the use is more flexible and convenient.

[0077] In an embodiment, the base body 1 can be detachably connected with the main body 4 through a detachable fastening structure such as a screw or a bolt, or can be detachably connected with the main body 4 through a detachable buckle structure.

[0078] In an embodiment, the base body 1 is arranged on the bottom of the main body 4, that is, the base body 1 can be used as the base of the main body 4, and can further reduce the noise generated by the cloth cleaning machine during operation.

[0079] Of course, in other embodiments, the installation direction of the base body 1 can be adjusted according to the specific position of the air outlet.

[0080] The utility model is not limited to the above-mentioned embodiments, and various modifications or changes of the utility model do not deviate from the spirit and scope of the utility model, and if the modifications and changes belong to the scope of the claims and the equivalent technology of the utility model, the utility model also intends to include the modifications and changes.

Claims

1. A noise reduction device, characterized in that: The noise reduction device is used to be connected to the fabric cleaning machine, and includes: A base (1), the base (1) being connected to a fabric cleaning machine, the base (1) having an air inlet (11) and a noise reduction air duct (12), the air inlet (11) being used to communicate with an air outlet of a fan assembly (5) of the fabric cleaning machine; There are multiple air inlet holes (11), and the multiple air inlet holes (11) are respectively connected to the air inlet end of the noise reduction air duct (12). The air inlet holes (11) are used to split the sound waves propagated from the air outlet of the fan assembly (5), and the noise reduction air duct (12) is used to reduce the noise of the sound waves propagated from the air inlet holes (11).

2. The noise reduction device according to claim 1, characterized in that The base (1) further comprises a plurality of exhaust holes (13), wherein the plurality of exhaust holes (13) are respectively connected to the air outlet ends of the noise reduction air duct (12), and the exhaust holes (13) are used to divide the residual sound waves propagated from the air outlet end of the noise reduction air duct (12).

3. The noise reduction device according to claim 2, characterized in that: The noise reduction air duct (12) is arranged around the exhaust hole (13).

4. The noise reduction device according to claim 2, characterized in that The noise reduction air duct (12) comprises: An air inlet section (121), wherein the air inlet end of the air inlet section (121) is connected to the air inlet hole (11); An air outlet section (122), wherein the air outlet section (122) and the air inlet section (121) are respectively disposed on both sides of the plurality of air exhaust holes (13) along a first direction, and an air outlet end of the air outlet section (122) is connected to the air exhaust holes (13); and Two extension sections (123), the two extension sections (123) are respectively placed on both sides of the plurality of exhaust holes (13) along a second direction, the second direction is perpendicular to the first direction, and the extension sections (123) are connected to the air outlet end of the air inlet section (121) and the air inlet end of the air outlet section (122).

5. The noise reduction device according to claim 1, characterized in that A first silencer (2) is provided in the noise reduction air duct (12), and the first silencer (2) is used for allowing air flow to pass through and absorbing sound wave energy.

6. The noise reduction device according to claim 5, characterized in that: The first silencer (2) is detachably arranged in the noise reduction air duct (12); The base (1) has an opening (14), the opening (14) is connected to the noise reduction air duct (12), and the opening (14) is used to allow the first silencer (2) to enter and exit the noise reduction air duct (12); The noise reduction device further comprises a cover (3), wherein the cover (3) is movably arranged on the base (1), and the cover (3) is used to open or close the opening (14).

7. The noise reduction device according to claim 1, characterized in that: The base (1) is provided with at least two layers of sound insulation (15), the sound insulation (15) is arranged around the noise reduction air duct (12), and the at least two layers of the sound insulation (15) are arranged at intervals.

8. The noise reduction device according to claim 1, wherein: The base (1) further comprises an air collecting groove (16), the air inlet end of the air collecting groove (16) being used to communicate with the air outlet of the fan assembly (5), and the air outlet end of the air collecting groove (16) being connected to the air inlet hole (11).

9. Fabric cleaning machine, characterized in that, include: Main body (4); A fan assembly (5), the fan assembly (5) being arranged in the main body (4); as well as The noise reduction device according to any one of claims 1 to 8, wherein the base (1) is connected to the main body (4), and the air inlet (11) is connected to the air outlet of the fan assembly (5).

10. The fabric cleaning machine according to claim 9, characterized in that: The base (1) is arranged at the bottom of the main body (4).

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