CN115874418A - Sound absorption structure and clothes treatment equipment - Google Patents

Abstract

The application relates to the field of sound absorption of household appliances, and provides a sound absorption structure and clothes treatment equipment, and the sound absorption structure includes a plurality of sound absorption units, and a plurality of sound absorption units are spliced along the plane of perpendicular to sound absorption structure thickness direction, and the sound absorption unit is formed with first cavity, second cavity and sound hole, the exterior space of first cavity of sound hole intercommunication and sound absorption structure, second cavity and first cavity intercommunication. The application provides a sound absorption structure, compact structure can save installation space, and sound absorption structure has good sound absorption effect in well, low frequency range, can realize great bandwidth range sound absorption or narrowband scope through the combination of a plurality of sound absorption units and concentrate the sound absorption, has good sound absorption performance.

Description

Sound absorption structure and clothes treatment equipment

Technical Field

The application relates to the technical field of sound absorption of household appliances, in particular to a sound absorption structure and clothes treatment equipment.

Background

The noise generated by the clothes treatment equipment is mainly medium and low frequency noise, wherein the low frequency noise is particularly the main noise. If the low-frequency noise is too large, the physiological and psychological of people can be damaged to different degrees. Accordingly, reducing noise generated from the laundry treating apparatus contributes to a better living environment for the user.

A commonly used sound absorbing material of the laundry treating apparatus is a porous material such as sound absorbing cotton. The sound-absorbing cotton has good absorption effect on medium-high frequency noise, but the low-frequency sound-absorbing effect is very limited. The low-frequency noise absorption capacity of the clothes treatment equipment can be improved by increasing the thickness of the sound absorption cotton, but the internal space of the clothes treatment equipment is limited, and the sound absorption cotton with enough thickness cannot be arranged; in addition, the clothes treatment equipment is mostly arranged in a toilet, the environmental humidity is relatively high, and the sound absorption performance is greatly reduced after the sound absorption cotton absorbs water. The above-mentioned disadvantages of the sound-absorbing cotton greatly limit the use effect thereof in the laundry treating apparatus.

Disclosure of Invention

In view of the above, embodiments of the present application are intended to provide a sound absorbing structure and a laundry treating apparatus capable of eliminating middle and low frequency noise.

In order to achieve the above object, an aspect of the embodiments of the present application provides a sound absorption structure, where the sound absorption structure includes a plurality of sound absorption units, the sound absorption units are spliced along a plane perpendicular to a thickness direction of the sound absorption structure, the sound absorption units are formed with a first cavity, a second cavity, and a sound hole, the sound hole communicates with the first cavity and an external space of the sound absorption structure, and the second cavity communicates with the first cavity.

In some embodiments, the sound absorbing unit includes a cannula positioned within the first chamber, at least one of the sound holes being provided with the cannula, the cannula communicating the sound hole with the first chamber.

In some embodiments, the lengths or cross-sectional areas of the cannulas of at least two of the sound absorbing units are unequal; or the like, or a combination thereof,

the lengths of the insertion pipes or the cross-sectional areas of the insertion pipes of the sound absorption units are equal.

In some embodiments, the first and second chambers are arranged along a plane perpendicular to a thickness direction of the sound absorbing structure.

In some embodiments, the number of the second chambers is plural, and each of the second chambers is independent of each other.

In some embodiments, the sound aperture is located at a position of the first chamber remote from the second chamber.

In some embodiments, the sound holes are formed in a side wall of the first chamber in a thickness direction of the sound absorbing structure.

In some embodiments, the sound absorption unit includes a partition located in the closed chamber and dividing the closed chamber into the first chamber and the second chamber, and a housing having a closed chamber on which the sound hole is formed.

In some embodiments, the casing includes a cover plate and a bottom case, one side of the bottom case in the thickness direction of the sound absorbing structure is opened, and the cover plate closes the opening of the bottom case to cooperatively form the closed cavity.

In some embodiments, the partition is spaced from the inner surface of the closed cavity to form a spacing region that communicates the first chamber and the second chamber; or the like, or, alternatively,

a through hole is formed in the partition plate and is communicated with the first cavity and the second cavity; or

The sound absorption unit comprises a throat pipe arranged on the partition board in a penetrating mode, and the throat pipe is communicated with the first cavity and the second cavity.

In some embodiments, the sound absorbing unit has a maximum thickness of between 5mm and 15 mm.

Another aspect of embodiments of the present application provides a laundry treating apparatus, including:

the sound absorbing structure of any of the above;

the sound absorption structure is arranged on at least part of the inner surface of the box body, and the sound holes face the inside of the box body;

the barrel component is arranged in the box body and is provided with a clothes treatment cavity.

The sound absorption structure that this application embodiment provided, on the one hand, the sound wave that comes from sound absorption structure's exterior space passes through the sound hole and gets into in the first cavity, the gas column in the sound hole produces the vibration, gas in the first cavity is by the gas column periodic compression or the inflation in the sound hole, gas in the first cavity produces the harmonic, friction damping during vibration makes partly acoustic energy convert heat energy dissipation into, when the sound wave frequency is the same with first cavity natural frequency, produce resonance, the vibration speed of the gas column in the sound hole reaches the maximum value, the acoustic energy that consumes this moment is the most, it is also the biggest to inhale the volume. When another part of the sound waves are transmitted from the first chamber to the second chamber, the cross-sectional area passed by the sound waves is suddenly changed in the process of propagation, so that the acoustic impedance is suddenly changed, and another part of the sound waves are reflected and interfered to reduce the acoustic energy. So, through the cooperation sound absorption between sound hole, first cavity and the second cavity, not only solved traditional sound absorbing material if inhale the problem that sound cotton low frequency sound absorption effect is poor, influenced by ambient humidity, can also effectively reduce sound absorbing unit's thickness, avoid occupying great installation space to be applicable to along the less installation environment of sound absorbing structure thickness direction size. On the other hand, a plurality of sound absorption units are spliced along the plane perpendicular to the thickness direction of the sound absorption structure, the sound absorption structure is approximately flat, the structure is compact, the installation space can be saved, the sound absorption structure has a good sound absorption effect in a middle and low frequency range, large bandwidth range sound absorption or narrow band range concentrated sound absorption can be realized through the combination of the sound absorption units, and the sound absorption performance is good.

Drawings

FIG. 1 is a schematic structural view of a sound absorbing structure in an embodiment of the present application, wherein a cover plate is not shown;

FIG. 2 is a schematic diagram of the structure of FIG. 1 from another perspective;

FIG. 3 is a schematic diagram of the structure of FIG. 1 from yet another perspective;

fig. 4 is a schematic structural view of a sound absorbing unit in an embodiment of the present application;

FIG. 5 is an exploded view of the structure shown in FIG. 4;

FIG. 6 is a schematic view of the structure of FIG. 4 from another perspective, wherein the cover plate is not shown;

fig. 7 is a schematic structural view of a laundry treating apparatus according to an embodiment of the present application;

FIG. 8 is a schematic view of the structure of FIG. 7 from another perspective;

fig. 9 is a graph of sound absorption characteristics of a sound absorbing structure in an embodiment of the present application.

Description of the reference numerals

A sound absorbing structure 10; a sound absorption unit 100; a first chamber 100a; a second chamber 100b; a sound hole 100c; a cannula 110; a partition 120; a transverse daughter board 121; a longitudinal sub-panel 122; a housing 130; a closed cavity 130a; the spacing regions 130a'; a cover plate 131; a bottom case 132; a case 20.

Detailed Description

It should be noted that the embodiments and technical features of the embodiments in the present application may be combined with each other without conflict, and the detailed description in the detailed description should be understood as an explanation of the gist of the present application and should not be construed as an undue limitation to the present application.

The orientation or positional relationship in the description of the embodiments of the present application is that of the sound absorbing structure and the laundry treating apparatus in normal use, for example, as shown in fig. 1 and 7, it is to be understood that these orientation terms are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Referring to fig. 1 to 3, in an embodiment of the present application, a sound absorbing structure 10 is provided, where the sound absorbing structure 10 includes a plurality of sound absorbing units 100, the sound absorbing units 100 are spliced along a plane perpendicular to a thickness direction of the sound absorbing structure 10, the sound absorbing units 100 are formed with a first chamber 100a, a second chamber 100b, and a sound hole 100c, the sound hole 100c communicates the first chamber 100a with an external space of the sound absorbing structure 10, and the second chamber 100b communicates with the first chamber 100a.

In the sound absorbing structure 10 provided in the embodiment of the present application, on one hand, sound waves from the external space of the sound absorbing structure 10 enter the first chamber 100a through the sound holes 100c, the air column in the sound holes 100c vibrates, the gas in the first chamber 100a is periodically compressed or expanded by the air column in the sound holes 100c, the gas in the first chamber 100a generates harmonics, friction damping during vibration converts a part of sound energy into heat energy to be dissipated, when the sound wave frequency is the same as the natural frequency of the first chamber 100a, resonance is generated, the vibration speed of the air column in the sound holes 100c reaches the maximum value, at this time, the consumed sound energy is the largest, and the sound absorbing amount is the largest. When another part of the sound wave is transmitted from the first chamber 100a to the second chamber 100b, the cross-sectional area through which the sound wave passes changes abruptly during propagation, resulting in a sudden change in acoustic impedance, and another part of the sound wave reflects and interferes to reduce the sound energy. So, through the cooperation sound absorption between sound hole 100c, first cavity 100a and the second cavity 100b, not only solved traditional sound absorbing material if inhale the problem that sound cotton low frequency sound absorption effect is poor, receive the influence of ambient humidity, can also effectively reduce sound absorbing unit 100's thickness, avoid occupying great installation space to be applicable to along the less installation environment of sound absorbing structure 10 thickness direction size. On the other hand, the plurality of sound absorption units 100 are spliced along the plane perpendicular to the thickness direction of the sound absorption structure 10, the sound absorption structure 10 is approximately flat, the structure is compact, the installation space can be saved, the sound absorption structure 10 has a good sound absorption effect in a middle and low frequency range, sound absorption in a large bandwidth range or a narrow band range can be realized through the combination of the plurality of sound absorption units 100, and the sound absorption performance is good.

The sound absorption structure 10 provided by the embodiment of the present application can be used in a household appliance, taking a clothes treatment apparatus as an example, please refer to fig. 7 and 8, the clothes treatment apparatus includes the sound absorption structure 10 in any embodiment of the present application, a box 20, and a cylinder assembly disposed in the box 20, at least a part of the inner surface of the box 20 is provided with the sound absorption structure 10, and the sound holes 100c face into the box 20. The drum assembly has a laundry treating chamber. The laundry treating chamber is used for treating laundry, such as washing and/or drying, etc.

The specific type of the laundry treating apparatus is not limited, and for example, the laundry treating apparatus may be a washing machine, a dryer, a washer-dryer, or the like. For example, the laundry treating apparatus may be a pulsator washing machine or a drum washing machine, or the like. The noise sources of the laundry treating apparatus in the washing state include, but are not limited to, vibration noise generated by the drum assembly, noise generated by water flow and/or laundry movement within the drum assembly. When the laundry treating apparatus has a clothes drying function, a noise source of the laundry treating apparatus further includes an air flow noise generated by an air flow, and the like. The noise frequency range of the clothes treatment equipment is usually between 100Hz (hertz) and 1000Hz, the main noise frequency band is concentrated between 300Hz and 700Hz, and the main noise frequency band is medium and low frequency noise.

The clothes treatment equipment that this application embodiment provided, sound absorbing structure 10 sets up on the internal surface of box 20, and sound absorbing structure 10 can eliminate clothes treatment equipment's noise well, avoids the noise to pass outward, and user experience is good. Because the space that the barrel subassembly occupied is great, and the interval between the internal surface of barrel subassembly and box 20 is very little, and in the clothing treatment facility use, there is vibration to a certain extent in barrel subassembly and box 20 etc., has the collision risk between barrel subassembly and the box 20, consequently, the thickness of sound absorbing structure 10 needs to be less, just is convenient for place and gets into between the internal surface of barrel subassembly and box 20. The sound absorption structure 10 provided by the embodiment of the application has a compact structure and a small thickness, can be placed between the inner surfaces of the barrel assembly and the box body 20, and is convenient for pertinently eliminating noise generated by the clothes treatment equipment.

In one embodiment, referring to fig. 7 and 8, the sound absorbing structure 10 is attached to two side plates along the left and right direction of the cabinet 20. Taking a drum washing machine as an example, a front side plate of the drum washing machine is generally required to be provided with a door body for opening and closing a laundry input port so as to input or output laundry into or from a laundry treatment chamber through the input port, and a back side plate is required to be provided with a drain pipeline and the like. Taking a pulsator washing machine as an example, a top plate of the pulsator washing machine is generally required to be provided with a door body for opening and closing a laundry input port so as to input or output laundry into or from a laundry treatment chamber through the input port, and a bottom plate is required to be provided with a drain line, etc. The inner surfaces of the two side plates in the left-right direction of the box 20 do not need to be provided with other structural members, the inner surfaces of the two side plates in the left-right direction can be used for assembling the sound absorbing structure 10 in a large area, and the gap between the two side plates in the left-right direction and the cylinder assembly is large, so that the sound absorbing structure 10 can be assembled conveniently.

It is understood that the sound absorbing structure 10 may be provided at other positions of the laundry device. Such as the front, rear, top and/or bottom panels of the cabinet 20, etc.

Please refer to fig. 7, a side of the clothes treating apparatus facing the user is a front side, two sides along a direction of the left and right hands of the user are left and right sides, a side away from the user is a back side, a side facing the ceiling is a top side, and a side facing the ground is a bottom side.

In one embodiment, referring to fig. 7 and 8, the sound absorbing structure 10 is multiple, and the multiple sound absorbing structures 10 are attached to the inner surface of the box 20. So, control sound-absorbing structure 10's area size, be convenient for make the standard component with sound-absorbing structure 10, the multiple size's of adaptation clothing treatment equipment, in clothing treatment equipment production equipment process, select sound-absorbing structure 10 of appropriate quantity to assemble to box 20 on, avoid sound-absorbing structure 10 area size oversize, difficult the matching with the size of box 20, avoid sound-absorbing structure 10's area size undersize again, same box 20 size needs attached too much sound-absorbing structure 10, increase the assembly degree of difficulty.

The opening shape of the sound hole 100c is not limited, and exemplary opening shapes of the sound hole 100c include, but are not limited to, a circle, an ellipse, a polygon, and the like. For example, referring to fig. 3 and 4, the opening of the sound hole 100c is circular, and the inner diameter of the sound hole 100c is between 1mm (millimeter) and 6 mm. For another example, the opening shape of the sound hole 100c is a square, and the side length of the sound hole 100c is 1mm to 6 mm. Therefore, on one hand, the opening shape of the sound hole 100c is circular or square, the structure shape is simple, the manufacturing process is simple, the forming is easy, and the cost is low. On the other hand, the opening area of the sound hole 100c can be matched to the noise band of the laundry treating apparatus, so that the noise of the laundry treating apparatus is well eliminated.

The number of the sound holes 100c is not limited, and for example, in one embodiment, please refer to fig. 4, the number of the sound holes 100c is one. Thus, the number of sound holes 100c is small, manufacturing is simpler, and costs are relatively lower. In another embodiment, the number of the sound holes 100c is plural. For example, the sum of the open areas of the plurality of smaller sound holes 100c may be equal to the open area of the single larger sound hole 100c, such that the acoustic mass of the plurality of smaller sound holes 100c is approximately equivalent to the acoustic mass of the single larger sound hole 100c, and the same sound absorption purpose may be achieved.

In one embodiment, referring to fig. 1 to 6, the sound absorption unit 100 includes a cannula 110 disposed in the first chamber 100a, at least one sound hole 100c is provided with the cannula 110, and the cannula 110 communicates the sound hole 100c and the first chamber 100a. The sound waves pass through the sound hole 100c, the cannula 110 and into the first chamber 100a. The insertion tube 110 can increase the sound mass so that the gas in the first chamber 100a is periodically compressed or expanded by the gas column in the sound hole 100c and the gas column in the insertion tube 110 together, thereby facilitating further reduction of the thickness of the sound absorbing unit 100, and thus the thickness of the sound absorbing structure 10, so that the sound absorbing structure 10 takes the form of a flat, ultra-thin structure.

At least one sound hole 100c is provided with a cannula 110, and may be one sound hole 100c and one cannula 110, and the sound hole 100c and the cannula 110 are correspondingly arranged. Alternatively, a plurality of sound holes 100c may be provided, one cannula 110 may be provided, and the cannula 110 may be provided corresponding to one of the sound holes 100c. The number of the sound holes 100c and the number of the insertion tubes 110 may be the same, and the sound holes 100c and the insertion tubes 110 may be arranged in a one-to-one correspondence. Alternatively, the number of the sound holes 100c and the number of the insertion tubes 110 may be plural, the number of the sound holes 100c may be larger than the number of the insertion tubes 110, some of the sound holes 100c may be provided with the insertion tubes 110, and some of the sound holes 100c may be provided without the insertion tubes 110.

In the embodiments of the present application, a plurality means two or more.

It is understood that the sound absorbing unit 100 may also be provided without the insertion tube 110.

In one embodiment, referring to fig. 1 and 2, the lengths of the cannulas 110 of at least two sound absorbing units 100 are different. At least two means may be two, three or more. Illustratively, the lengths of all of the cannulas 110 of at least two sound absorbing units 100 may be different, or the lengths of some of the cannulas 110 of at least two sound absorbing units 100 may be different. Taking the example that each sound absorbing unit 100 includes two insertion tubes 110, in one embodiment, the lengths of the two insertion tubes 110 of at least two sound absorbing units 100 are different; in another embodiment, the lengths of the one cannula 110 of at least two sound absorbing units 100 may be different. Taking a plurality of sound absorption units 100, each sound absorption unit 100 includes one insertion pipe 110, in one embodiment, the insertion pipes 110 of two sound absorption units 100 may have different lengths; in another embodiment, the lengths of the cannulas 110 of three sound absorbing units 100 can vary. In yet another embodiment, it is also possible that the lengths of the cannulas 110 of all sound absorbing units 100 are different. Thus, in one aspect, the sound absorption frequency of the sound absorption unit 100 is related to the length of the insertion tube 110, with the longer the length of the insertion tube 110, the lower the sound absorption frequency. Under the condition that the sizes such as the opening areas of the first cavity 100a, the second cavity 100b and the sound hole 100c are not changed, the sound absorption frequency of the sound absorption unit 100 can be adjusted by adjusting the length of the insertion pipe 110, the design requirement is met, and therefore the design and manufacturing difficulty can be reduced. On the other hand, the lengths of the insertion pipes 110 of the sound absorption units 100 are different, and a plurality of resonance modes are correspondingly generated, so that a plurality of sound absorption peak values are generated, and thus, a large bandwidth can be generated in a middle and low frequency range, and a large bandwidth sound absorption is realized. On the other hand, the length of the insertion pipe 110 can be adjusted according to the requirement of the target sound absorption frequency, so that noises with different frequencies can be eliminated in a centralized manner, narrow-band or single-frequency sound absorption with high sound absorption coefficient is realized, and a good sound absorption effect is achieved.

In one embodiment, the cross-sectional areas of the cannulas 110 of at least two sound absorbing units 100 are different. Illustratively, the cross-sectional area of all of the cannulas 110 of at least two sound absorbing units 100 may be different, or the cross-sectional area of a portion of the cannulas 110 of at least two sound absorbing units 100 may be different. Thus, by adjusting the cross-sectional area of cannula 110, on the one hand, a greater bandwidth can be created in the mid and low frequency ranges, thereby achieving greater bandwidth sound absorption. On the other hand, the noise of a plurality of different frequencies can be eliminated in a centralized manner according to the requirement, so that the sound absorption with narrow band or single frequency and high sound absorption coefficient is realized, and a good sound absorption effect is achieved.

In one embodiment, referring to fig. 1 and 2, the sound absorbing structure 10 includes sixteen sound absorbing units 100, each sound absorbing unit 100 includes a sound hole 100c and an insertion pipe 110, and the insertion pipes 110 of the sound absorbing units 100 have different lengths. Thus, the resonance frequency of each sound absorbing unit 100 is different, so that the sound absorption peaks of different frequencies are staggered, and the sound absorption coefficient of the whole sound absorbing structure 10 is high in the middle and low frequency ranges. Illustratively, the length of the insertion tube 110 of each sound absorption unit 100 is adjusted according to the target sound absorption frequency range of the laundry treatment apparatus, and the sound absorption structure 10 is used for simulation analysis, please refer to fig. 9, the sound absorption coefficient of the sound absorption structure 10 in the frequency range of the large bandwidth of 300Hz to 700Hz is high, and the sound absorption coefficient at 700Hz reaches above 0.9, so that the sound absorption with the large bandwidth can be realized by combining a plurality of sound absorption units 100.

In one embodiment, the lengths of the cannulas 110 of the sound absorbing units 100 are all equal. Therefore, the noise of single frequency can be intensively eliminated, and a higher sound absorption peak value is kept.

In one embodiment, the cross-sectional area of the insertion tube 110 of each sound absorbing unit 100 is equal. Therefore, the noise of single frequency can be intensively eliminated, and a higher sound absorption peak value is kept.

In one embodiment, referring to fig. 1 and 2, the first and second chambers 100a and 100b are arranged along a plane perpendicular to a thickness direction of the sound absorbing structure 10. For example, the projection of the first chamber 100a and the projection of the second chamber 100b do not overlap each other with a plane perpendicular to the thickness direction of the sound absorbing structure 10 as a projection plane. In this way, further reduction in the thickness of the sound absorbing structure 10 is facilitated.

The number of the second chambers 100b is not limited, and for example, in one embodiment, the number of the second chambers 100b is one. In another embodiment, referring to fig. 1 to 6, the number of the second chambers 100b is multiple, and each of the second chambers 100b is independent. That is, the second chambers 100b are not communicated with each other. In this way, harmonics are enhanced by the plurality of second chambers 100b to further reduce the thickness of the sound absorbing structure 10.

In one embodiment, referring to fig. 5 and 6, the sound absorption unit 100 includes a partition 120 and a housing 130 having a closed cavity 130a, the partition 120 is located in the closed cavity 130a and divides the closed cavity 130a into a first chamber 100a and a second chamber 100b, and a sound hole 100c is formed in the housing 130. The silencing unit has simple structure, easy manufacture and molding and low cost.

The shape of the casing 130 is not limited, and for example, a plane perpendicular to the thickness direction of the sound absorbing structure 10 is taken as a projection plane, and the projection of the casing 130 is substantially circular, elliptical or polygonal, and the like. For example, in one embodiment, referring to fig. 2 and 6, the projection of the housing 130 is substantially quadrilateral. Like this, not only the manufacturing degree of difficulty of amortization unit is low, still is convenient for a plurality of amortization unit concatenations. For example, the circumferential sides of two adjacent housings 130 are fitted, so that the contact area between the adjacent housings 130 is large and there is no space, and the sound absorbing structure 10 can be combined with more sound absorbing units 100 under the condition that the assembly space is limited.

The material of the housing 130 is not limited, and exemplary materials of the housing 130 include, but are not limited to, plastic, metal, and the like.

In one embodiment, referring to fig. 4 and 5, the casing 130 includes a cover plate 131 and a bottom shell 132, one side of the bottom shell 132 along the thickness direction of the sound absorbing structure 10 is opened, and the cover plate 131 closes the opening of the bottom shell 132 to form a closed cavity 130a cooperatively. Therefore, the bottom shell 132 and the cover plate 131 are manufactured and molded separately, the manufacturing difficulty is low, and the production efficiency is high.

The material of the partition 120 is not limited, and for example, the material of the partition 120 includes, but is not limited to, plastic or metal, etc.

In one embodiment, referring to fig. 4 to 6, the partition 120, the insertion tube 110 and the bottom shell 132 are integrally formed. Therefore, the manufacturing cost is further reduced, and the production efficiency is improved.

In one embodiment, referring to fig. 1 to 5, the cover plates 131 of the sound absorption units 100 may be integrally formed, and the partition plates 120, the insertion pipes 110, and the bottom case 132 of the sound absorption units 100 may be integrally formed. Thus, the assembling procedures can be reduced, and the assembling efficiency can be improved.

In one embodiment, referring to fig. 5 and 6, the partition 120 is spaced apart from the inner surface of the closed cavity 130a to form a spacing region 130a ', and the spacing region 130a' communicates with the first chamber 100a and the second chamber 100b. The space in the first chamber 100a and the second chamber 100b is relatively larger, and the opening area of the partition region 130a 'is relatively smaller, so that the sound wave is transmitted from the first chamber 100a to the second chamber 100b through the partition region 130a', the transmission section is suddenly changed, and the reflection and interference of the sound wave are enhanced, thereby achieving the purpose of sound absorption. By the design, the structure is simple, the number of structural parts is small, and the cost is low.

In an exemplary embodiment, referring to fig. 5 and 6, the partition 120 includes a transverse sub-board 121 and a longitudinal sub-board 122, two sides of a top and a bottom of the transverse sub-board 121 respectively abut against an inner bottom surface of the bottom case 132 and an inner top surface of the cover plate 131, two free ends of the transverse sub-board 121 and an inner peripheral side surface of the bottom case 132 are respectively formed with a spacing area 130a', two free ends of the longitudinal sub-board 122 respectively abut against circumferential surfaces of the transverse sub-board 121 and the bottom case 132, and two sides of a top and a bottom of the longitudinal sub-board 122 respectively abut against an inner bottom surface of the bottom case 132 and an inner top surface of the cover plate 131. That is, in a projection plane perpendicular to the thickness direction of the sound absorbing structure 10, the projections of the transverse daughter board 121 and the longitudinal daughter board 122 are substantially T-shaped, dividing the closed cavity 130a into one first cavity 100a and two second cavities 100b.

In one embodiment, referring to fig. 5 and 6, the partition 120 abuts against top and bottom surfaces of two ends of the closed cavity 130a along the thickness direction of the sound absorbing structure 10, the partition 120 and the closed cavity 130a are disposed at intervals along the circumferential surface of the sound absorbing structure 10 in the circumferential direction to form an interval region 130a', the sound hole 100c is formed on a side wall of the housing 130 along the thickness direction of the sound absorbing structure 10, and the insertion pipe 110 extends along the thickness direction of the sound absorbing structure 10. In this way, the effect of the sound hole 100c and the insertion tube 110 on the axial sound propagation can be reduced, thereby further reducing the thickness of the sound absorbing structure 10.

In one embodiment, the partition 120 is formed with a through hole communicating the first chamber 100a and the second chamber 100b. For example, the outer periphery of the partition plate 120 abuts against the inner surface of the closed chamber 130a, and the partition plate 120 has a through hole formed therein. That is, there is no gap between the outer circumferential surface of the partition plate 120 and the inner surface of the closed chamber 130a. The space in the first chamber 100a and the second chamber 100b is relatively bigger, and the opening area of the through hole is smaller, so that the sound wave is transmitted to the second chamber 100b from the first chamber 100a through the through hole, the transmission section is suddenly changed, the reflection and interference of the sound wave are enhanced, and the purpose of sound absorption is achieved. By the design, the structure is simple, the number of structural parts is small, and the cost is low.

In one embodiment, the sound absorbing unit 100 includes a throat formed through the partition 120 and communicating the first chamber 100a and the second chamber 100b. For example, the outer periphery of the diaphragm 120 abuts against the inner surface of the closed chamber 130a, and a throat is formed in the diaphragm 120. That is, there is no gap between the outer circumferential surface of the partition plate 120 and the inner surface of the closed chamber 130a. So designed, on the one hand, the space in the first chamber 100a and the second chamber 100b is relatively larger, and the opening area of the end of the throat is smaller, so that the sound wave is transmitted from the first chamber 100a to the second chamber 100b through the throat, the transmission section is suddenly changed, and the reflection and interference of the sound wave are enhanced. On the other hand, the throat can increase the sound quality in the throat, and is convenient for better sound absorption.

In one embodiment, referring to fig. 6, the sound hole 100c is located in the first chamber 100a away from the second chamber 100b. For example, the sound hole 100c is located at a position of the first chamber 100a away from the diaphragm 120. For another example, when the housing 130 is quadrangular, the sound hole 100c is located at a corner of the housing 130 and away from the diaphragm 120. Thus, the sound hole 100c is distant from the second chamber 100b, the thickness of the sound absorbing unit 100 can be thinner, and the resonance frequency can be lowered to better eliminate the low frequency noise.

In one embodiment, referring to fig. 5 and 6, the sound holes 100c are formed in a side wall of the first chamber 100a along the thickness direction of the sound absorbing structure 10. For example, the sound hole 100c is formed on the cover plate 131, and the bottom wall of the bottom case 132 is attached to the inner surface of the cabinet 20. For another example, the sound hole 100c is formed in the bottom wall of the bottom case 132, and the cover plate 131 is attached to the inner surface of the cabinet 20. Thus, on the one hand, the plurality of sound absorbing units 100 can be easily spliced along a plane perpendicular to the thickness direction of the sound absorbing structure 10, and the sound holes 100c of two adjacent sound absorbing units 100 can be prevented from interfering with each other. On the other hand, the sound holes 100c of each sound absorbing unit 100 face into the case 20 when the sound absorbing structure 10 is assembled to the inner surface of the case 20.

In one embodiment, the sound absorption unit 100 has a maximum thickness of between 5mm and 15 mm. For example, the maximum thickness of the sound absorption unit 100 is 5mm, 8mm, 10mm, 13mm, or 15mm, or the like. Thus, a proper gap is formed between the sound absorption unit 100 and the cylinder assembly, and collision between the cylinder assembly and the sound absorption unit 100 is avoided when the cylinder assembly vibrates.

In one embodiment, the opening of the cannula 110 is circular, and the inner diameter of the opening of the cannula 110 is between 1mm and 6 mm. In another embodiment, the opening of the cannula 110 is square, and the side of the opening of the cannula 110 is between 1mm and 6 mm. In this way, it is possible to eliminate medium and low frequency noise, for example, noise between 300Hz and 700Hz in a laundry treatment apparatus, while ensuring that the thickness of the sound absorbing structure 10 is small.

In one embodiment, referring to fig. 1 and 2, the length of cannula 110 is between 0.5mm and 7.5 mm. In this way, the insertion tube 110 has a moderate length, which not only ensures that the sound absorbing structure 10 has a small thickness, but also ensures that the sound absorbing unit 100 can eliminate the noise of the target frequency.

The various embodiments/implementations provided herein can be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (12)

1. The utility model provides a sound absorption structure, its characterized in that, sound absorption structure includes a plurality of sound absorption units, and is a plurality of sound absorption unit is along perpendicular to the plane concatenation of sound absorption structure thickness direction, sound absorption unit is formed with first cavity, second cavity and sound hole, the sound hole intercommunication first cavity with the exterior space of sound absorption structure, the second cavity with first cavity intercommunication.

2. A sound-absorbing structure according to claim 1, wherein the sound-absorbing unit comprises a spigot in the first chamber, at least one of the sound holes being provided with the spigot, the spigot communicating the sound hole with the first chamber.

3. The sound absorbing structure of claim 2 wherein the lengths or cross-sectional areas of the inserted tubes of at least two of the sound absorbing units are unequal; or the like, or, alternatively,

the lengths of the insertion pipes or the cross-sectional areas of the insertion pipes of the sound absorption units are equal.

4. The sound absorbing structure of claim 1 wherein the first and second chambers are arranged along a plane perpendicular to the thickness of the sound absorbing structure.

5. The sound absorbing structure of claim 1 wherein the number of the second chambers is plural, each of the second chambers being independent of each other.

6. A sound absorbing structure in accordance with claim 1, wherein said sound holes are located in said first chamber at a location remote from said second chamber.

7. The sound absorbing structure according to claim 1, wherein the sound holes are formed in a side wall of the first chamber in a thickness direction of the sound absorbing structure.

8. The sound absorbing structure according to any one of claims 1 to 7, wherein the sound absorbing unit includes a partition plate and a casing having a closed chamber, the partition plate being located in the closed chamber and dividing the closed chamber into the first chamber and the second chamber, the casing being formed with the sound holes.

9. The sound absorbing structure of claim 8, wherein the housing includes a cover plate and a bottom case, the bottom case being open at one side in a thickness direction of the sound absorbing structure, the cover plate closing the opening of the bottom case to cooperatively form the closed chamber.

10. The sound absorbing structure of claim 8 wherein the baffle is spaced from the inner surface of the closed cavity to form a spaced area communicating the first and second chambers; or the like, or, alternatively,

a through hole is formed in the partition plate and is communicated with the first cavity and the second cavity; or

The sound absorption unit comprises a throat pipe penetrating through the partition plate, and the throat pipe is communicated with the first cavity and the second cavity.

11. A sound-absorbing structure according to any one of claims 1 to 7, wherein the maximum thickness of the sound-absorbing unit is between 5mm and 15 mm.

12. A laundry treating apparatus, comprising:

a sound absorbing structure as recited in any one of claims 1 to 11;

the sound absorption structure is arranged on at least part of the inner surface of the box body, and the sound hole faces the inside of the box body;

the barrel component is arranged in the box body and is provided with a clothes treatment cavity.

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