Axial sealing unit and clothes treating equipment

Abstract

The utility model belongs to the field of household appliances, and provides an axial sealing unit and clothes treating equipment, the axial sealing unit comprises a sealing support, an elastic part and a pressing part, and the sealing support is fixedly arranged on the side, facing a rotary drum, of a rear back plate; the elastic piece is arranged on the side, facing the rotary drum, of the sealing support. The press-fit piece covers part of the elastic piece and is fixedly connected with the sealing support, and part of the surface of the elastic piece protrudes towards the side deviating from the sealing support relative to the press-fit piece; wherein the elastic piece protrudes out of the surface of the pressing piece and can be rotationally connected with the end, close to the sealing support, of the rotary drum in the axial direction in an abutting mode, and the sealing support can generate elastic deformation when the rotary drum abuts against the elastic piece. According to the axial sealing unit and the clothes processing equipment, the dynamic sealing effect of the rotary drum can be improved.

Description

Technical Field

[0001] The present application belongs to the field of household appliances, and more specifically, relates to an axial sealing unit and a clothing processing device. Background Art

[0002] In the related art, a clothes processing device with a drying function needs to deliver hot air for drying into a rotating drum during operation. In order to reduce the loss of hot air during the delivery process, a sealing structure is generally required to be provided between the rotating drum and the back plate.

[0003] Sealing structures in related technologies typically utilize elastic materials such as felt, foam, and rubber for sealing, leveraging the elasticity of these materials to achieve an axial interference fit and dynamic seal with the drum. However, these dynamic sealing structures have been found to be less effective, and the elastic materials can easily wrinkle and become uneven during installation. Utility Model Content

[0004] The present application provides an axial sealing unit and a clothing processing device, which can improve the dynamic sealing effect of the drum to a certain extent.

[0005] To achieve the above objectives, the technical solution adopted in this application is:

[0006] In a first aspect, an axial sealing unit is provided for use in a clothes processing device with a drying function, the clothes processing device having a rotating drum. The axial sealing unit comprises a sealing bracket, an elastic member, and a pressing member. The sealing bracket is fixedly mounted on a side of a back plate facing the rotating drum; the elastic member is mounted on a side of the sealing bracket facing the rotating drum; the pressing member covers a portion of the elastic member and is fixedly connected to the sealing bracket, with a portion of the surface of the elastic member protruding relative to the pressing member toward a side facing away from the sealing bracket. The surface of the elastic member protruding from the pressing member is rotatably abutted against an end of the rotating drum axially proximal to the sealing bracket, and the sealing bracket is elastically deformed when the rotating drum abuts against the elastic member.

[0007] In the axial sealing unit provided in the embodiment of the present application, by installing the elastic part used to connect with the rotating drum on a sealing bracket that can generate elastic and recoverable deformation, not only the difficulty of installing the elastic part is reduced, making the installation of the elastic part smoother; it can also provide the rotating drum with a more stable and better sealing dynamic sealing structure.

[0008] Optionally, the sealing bracket is an annular structure, comprising a supporting member and a connecting member connected to each other, the supporting member and the connecting member being integrally formed, and the elastic member being located on a side of the supporting member facing away from the connecting member;

[0009] The connecting member has a first end and a second end opposite to each other, the first end is used to be connected to the back plate, and the second end is connected to the supporting member;

[0010] The supporting member has a first surface and a second surface relative to each other, the connecting member is arranged on one side of the first surface in the radial direction, the elastic member is arranged on the second surface, and at least a part of the surface of the second surface is protruded with a first limiting member and a second limiting member arranged at intervals along the radial direction of the sealing bracket, and an installation groove for installing the elastic member is defined between the first limiting member and the second limiting member.

[0011] Optionally, at least two through-grooves are provided through the supporting member, and any one of the through-grooves passes through an end of the supporting member away from the connecting member and is spaced apart from the connecting member.

[0012] Optionally, the axial sealing unit further includes a sealing ring, and a groove for accommodating the sealing ring is recessed on the side of the connecting member facing the rear back plate. When the connecting member is fixedly mounted on the rear back plate, the sealing ring abuts against the rear back plate.

[0013] Optionally, in the radial direction of the sealing bracket, the first end protrudes relative to the second end and forms a protrusion;

[0014] A reinforcing rib connected to the protruding portion is provided on a side of the connecting member facing away from the supporting member, and the reinforcing rib extends along the axial direction of the sealing bracket toward the location of the first end.

[0015] Optionally, the elastic member is an annular structure, comprising a first layered elastic member and a second layered elastic member fixedly connected, the first layered elastic member being located between the sealing bracket and the second layered elastic member, and the radial length of the first layered elastic member being greater than the radial length of the second layered elastic member;

[0016] The pressing piece is covered on a side of the first layered elastic piece facing away from the sealing bracket and is adjacent to the second layered elastic piece. The second layered elastic piece protrudes relative to the pressing piece toward a side facing away from the sealing bracket.

[0017] Optionally, along the radial direction of the elastic member, the pressing member is located on the outside of the second layered elastic member.

[0018] Optionally, a first through-hole is formed on the first layered elastic member, a second through-hole matching the first through-hole is formed on the sealing bracket, a third through-hole matching the first through-hole is formed on the pressing member, and the pressing member is fixedly connected to the sealing bracket via a fastener passing through the third through-hole, the first through-hole, and the second through-hole;

[0019] The number of the first through-holes is at least two, and the numbers of the first through-holes, the second through-holes, and the third through-holes are the same.

[0020] Optionally, the sealing bracket further includes a reinforcing member, which is provided on the first surface and connected to the connecting member;

[0021] The reinforcement member includes a first reinforcement plate, a second reinforcement plate and a positioning post, the first reinforcement plate is annular and is spaced apart from the connecting member along the radial direction of the sealing bracket, the second reinforcement plate connects the first reinforcement plate and the connecting member, and the positioning post is located between the first reinforcement plate and the connecting member and is connected to the first reinforcement plate and the connecting member;

[0022] The positioning column and the supporting member are connected to form the second through hole.

[0023] Optionally, the connecting member is connected to the radially outer side of the supporting member.

[0024] In a second aspect, the present application further provides a clothes processing device, comprising:

[0025] A housing comprising a back plate and the axial sealing unit described in any one of the above items;

[0026] a drum rotatably disposed in the housing, the drum being configured to accommodate laundry to be processed, the drum having a flange extending circumferentially and protruding toward the back plate on a rear end surface thereof facing the back plate, the flange being matched with the elastic member;

[0027] The rotating drum abuts against the axial sealing unit via the flange.

[0028] Optionally, the flange is formed by the rear end surface being recessed toward one side of the rear back plate.

[0029] Optionally, the flange is an annular structure.

[0030] Optionally, an exhaust port is provided on the back plate, an air inlet is provided on the rear end surface of the drum, and the sealing bracket is provided around the exhaust port and the air inlet;

[0031] The air flow flows into the drum through the exhaust port and the air inlet.

[0032] Compared with the prior art, this application has at least the following beneficial effects:

[0033] The axial sealing unit provided in the embodiments of the present application reduces the difficulty of installing the elastic member and improves the smoothness of the elastic member's installation by adjusting the structure of the sealing structure. Furthermore, the sealing bracket is combined with the elastic member, and the sealing bracket is used to provide a certain degree of axial elastic deformation compensation for the rotating drum, thereby forming a stable and effective axial sealing structure, thereby improving the sealing performance of the sealing structure located at the back plate and reducing the possibility of seal failure. The beneficial effects of the laundry processing device provided in the embodiments of the present application, including any one or more of the above-mentioned axial sealing units, will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A schematic diagram of an axial sealing unit provided in an embodiment of the present application;

[0036] Figure 2 A cross-sectional view of an axial sealing unit provided in an embodiment of the present application;

[0037] Figure 3 for Figure 2 A magnified view of the structure of area A in the middle;

[0038] Figure 4 A schematic structural diagram of a sealing bracket in an axial sealing unit provided in an embodiment of the present application;

[0039] Figure 5 for Figure 4 A magnified view of the structure of area B in the middle;

[0040] Figure 6 A schematic structural diagram of the sealing bracket in the axial sealing unit provided in an embodiment of the present application from another angle;

[0041] Figure 7 for Figure 6 A magnified view of the structure of the middle C area;

[0042] Figure 8 A schematic structural diagram of a press-fit component in an axial sealing unit provided in an embodiment of the present application;

[0043] Figure 9 for Figure 8 A magnified view of the structure of the middle D area;

[0044] Figure 10 An exploded view of a portion of the structure of a clothes processing device provided in an embodiment of the present application;

[0045] Figure 11 Part structure sectional view of the laundry treating apparatus provided by the embodiment of the present application;

[0046] Figure 12 For Figure 11 Structure enlarged view of area E in the middle;

[0047] Figure 13 Structure schematic view of the laundry treating apparatus provided by the embodiment of the present application from another angle;

[0048] Figure 14 For Figure 13 Structure enlarged view of area F in the middle.

[0049] In the drawings, various reference numbers refer to:

[0050] 1, sealing support; 11, bearing piece; 111, first limiting piece; 112, second limiting piece; 113, mounting groove; 114, through slot; 1101, first surface; 1102, second surface; 12, connecting piece; 121, clamping groove; 122, reinforcing rib; 1201, first end; 1202, second end; 1203, protruding part; 13, second through hole; 14, reinforcing piece; 141, first reinforcing plate; 142, second reinforcing plate; 143, positioning column; 2, elastic piece; 21, first layered elastic piece; 211, first through hole; 22, second layered elastic piece; 3, pressing piece; 31, third through hole; 4, sealing ring; 5, positioning piece; 51, positioning groove; 52, positioning protrusion;

[0051] 10, axial sealing unit;

[0052] 20, back plate; 201, fourth through hole; 202, exhaust port;

[0053] 30, rotating drum; 301, rear end face; 311, flange; 312, air inlet;

[0054] 100, laundry treating apparatus. DETAILED DESCRIPTION

[0055] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0056] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0057] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0059] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0060] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] In this application, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0062] The embodiment of the present application provides an axial sealing unit 10 and a clothing processing device 100, wherein the clothing processing device 100 can be a device for drying clothes. It is understandable that the clothing processing device 100 can be a clothing processing device 100 directly arranged on the ground or a placement surface, or it can be a wall-mounted or countertop clothing processing device 100. The clothing processing device 100 has a clothing processing main unit, which has a shell, and a drum 30 for holding clothes is provided in the shell. The shell also has a clothing access opening for convenient user access to clothes. The clothing processing device 100 also has a movable door body, which is provided outside the clothing processing main unit and can move relative to the clothing access opening to open or close the above-mentioned clothing access opening.

[0063] On the side of the laundry processing device 100 facing away from the laundry access opening, the laundry processing device 100 further includes a back plate 20, which is part of the housing. The drum 30 can rotate relative to the back plate 20 to facilitate processing of the laundry within the drum 30. Therefore, to prevent the drying hot air from escaping through the gap between the drum 30 and the back plate 20 during the delivery process, an axial sealing structure is generally required.

[0064] Traditional axial sealing structures utilize the flexibility and elasticity of materials such as felt, foam, and rubber to seal the gap between the drum 30 and the back plate 20. However, these elastic materials have been found to provide poor sealing performance and can wear and age over time, gradually decreasing their effectiveness. Furthermore, these materials are prone to wrinkling during installation, resulting in poor surface smoothness and impacting sealing effectiveness.

[0065] In order to at least improve the above-mentioned problem to a certain extent, an embodiment of the present application provides an axial sealing unit 10 .

[0066] Figure 1 This is a schematic diagram of an axial sealing unit provided in an embodiment of the present application. Figure 2This is a cross-sectional view of the axial sealing unit provided in an embodiment of the present application. Figure 3 for Figure 2 A magnified view of the structure of area A in the middle.

[0067] The axial sealing unit 10 is applied to a clothes treating apparatus 100 having a drying function, and the clothes treating apparatus 100 has a rotating drum 30. The axial sealing unit 10 is arranged between a rear plate 20 and the rotating drum 30.

[0068] See also Figure 1 The axial sealing unit 10 includes a sealing bracket 1, an elastic member 2 and a pressing member 3, wherein the sealing bracket 1 can be fixedly arranged on the side of the back plate 20 facing the rotating drum 30; the elastic member 2 is arranged on the side of the sealing bracket 1 facing the rotating drum 30, and the pressing member 3 covers the partial surface of the elastic member 2 facing away from the sealing bracket 1 and is fixedly connected to the sealing bracket 1, and the partial surface of the elastic member 2 facing away from the sealing bracket 1 is raised relative to the pressing member 3.

[0069] At this time, when the axial sealing unit 10 is installed in the clothing processing device 100, the surface of the elastic part 2 protruding from the pressing part 3 can be rotatably abutted against the end of the rotating drum 30 axially close to the sealing bracket 1. At this time, the sealing bracket 1 can produce a recoverable elastic deformation under the abutment action of the rotating drum 30.

[0070] In some embodiments, the orthographic projection of the sealing bracket 1 in the axial direction of the drum 30 is a closed figure.

[0071] Specifically, the axial sealing unit 10 is an annular structure, with its axial direction parallel to the axial direction of the drum 30. The orthographic projection of the sealing bracket 1 in the axial direction of the drum 30 is consistent with the orthographic projection of the sealing bracket 1 in the axial direction. The orthographic projection of the sealing bracket 1 in the axial direction of the drum 30 is configured as a closed figure, and the orthographic projection of the elastic member 2 in the axial direction of the sealing bracket 1 is also configured as a closed figure. The combination of these two ensures that the axial sealing unit 10 forms a closed space with a strong dynamic sealing effect at the connection between the back plate 20 and the drum 30, preventing airflow and the heat carried by the airflow from leaking around the circumference of the axial sealing unit 10.

[0072] Specifically, the orthographic projection of the elastic member 2 in the axial direction of the axial sealing unit 10 at least partially overlaps with the orthographic projection of the sealing bracket 1 in the axial direction of the axial sealing unit 10 , and the overlapping portion is also a closed figure.

[0073] Through the above-mentioned structural definition, it can be ensured that when the sealing bracket 1 is fixedly installed on the back plate 20 and the elastic member 2 is rotatably abutted against the side of the rotating drum 30 close to the sealing bracket 1, a closed space can be formed between the rotating drum 30 and the back plate 20 through the axial sealing unit 10, ensuring that the airflow can enter the rotating drum 30 along the set path.

[0074] When the above-mentioned axial sealing unit 10 is assembled on the clothing processing device 100, the rotating drum 30 can be abutted against the elastic member 2. At this time, the sealing bracket 1 can produce a recoverable elastic deformation under the action of the extrusion force generated when the rotating drum 30 and the elastic member 2 abut against each other, so as to improve the adaptability to the movements such as jumping and eccentricity generated during the operation of the rotating drum 30, improve the sealing effect of the axial sealing unit 10, and improve the reliability and stability of the sealing structure between the back plate 20 and the rotating drum 30.

[0075] In addition, the sealing bracket 1 can also compensate for the wear caused by the rotation between the drum 30 and the elastic member 2, thereby forming a stable axial sealing structure with good sealing performance.

[0076] In order to ensure that the elastic member 2 can be firmly fixed on the sealing bracket 1 without affecting the contact between the elastic member 2 and the drum 30, this embodiment provides a pressing member 3 on at least one side of the elastic member 2 in the radial direction. The pressing member 3 can cover the partial surface of the elastic member 2 facing away from the sealing bracket 1 and be fixedly connected to the sealing bracket 1. At this time, the partial surface of the elastic member 2 protruding relative to the pressing member 3 is not affected by the pressing member 3 and can abut against the side of the drum 30 axially close to the back plate 20 when assembled into the clothing processing device 100.

[0077] When the sealing bracket 1 and the elastic member 2 are both annular structures, the pressing member 3 may be an annular structure, or may be a plurality of independent segment-shaped or block-shaped structures spaced apart along the extending direction of the elastic member 2 .

[0078] It should be noted that, in the axial direction of the axial sealing unit 10 , the end of the elastic member 2 facing away from the sealing bracket 1 always remains protruding relative to the pressing member 3 when in contact with the rotating drum 30 .

[0079] In order to facilitate the installation of the pressing piece 3 , the side of the elastic piece 2 facing away from the sealing bracket 1 may be sloped or stepped, and the pressing piece 3 covers the relatively thin area of ​​the elastic piece 2 .

[0080] Taking the step-shaped morphology on the side of the elastic member 2 facing away from the sealing bracket 1 as an example, the step-shaped morphology can be extended along the circumference of the elastic member 2 and present an annular structure. In this case, the pressing member 3 can be annular or a plurality of segment-shaped structures arranged at intervals. In other similar embodiments, the step-shaped morphology can be arranged at intervals along the circumference of the elastic member 2. In this case, the pressing member 3 is a plurality of segment-shaped structures that match the size and number of the step-shaped morphology.

[0081] See also Figure 1-Figure 3 The following briefly describes the shape and matching method of the pressing part 3 and the elastic part 2 by taking the example that both the pressing part 3 and the elastic part 2 are annular structures.

[0082] Specifically, the elastic member 2 may be an integrated structure or a split structure.

[0083] See also Figure 2 In this case, the elastic member 2 has a double-layer structure stacked in sequence along the axial direction of the sealing support 1. The elastic member 2 comprises a first elastic member 21 and a second elastic member 22, which are fixedly connected by sewing. The first elastic member 21 is located between the second elastic member 22 and the sealing support 1, and the radial length of the first elastic member 21 is greater than the radial length of the second elastic member 22. In this case, the pressing member 3 can be placed over the portion of the surface of the first elastic member 21 that faces away from the sealing support 1 and is exposed relative to the second elastic member 22. The second elastic member 22 can be positioned radially adjacent to the pressing member 3 and protrude relative to the pressing member 3 toward the side facing away from the sealing support 1.

[0084] In some embodiments, the number of the pressing member 3 is one, and the pressing member 3 can be located on the radially outer side or inner side of the second layered elastic member 22. Figure 2 and Figure 3 In this case, the first elastic layer 21 is exposed radially outward relative to the second elastic layer 22, and the pressing member 3 is located radially outward from the second elastic layer 22. In other similar embodiments, the pressing members 3 may be two, one located radially on either side of the second elastic layer 22. In this case, portions of the first elastic layer 21's surface are exposed radially relative to the second elastic layer 22 on both sides. The two nested annular pressing members 3 can cover the surface of the first elastic layer 21, and the second elastic layer 22 is located between the two spaced-apart annular pressing members 3.

[0085] When arranging the first and second elastic layer members 21, 22, the actual placement and dimensions of the second elastic layer member 22 can be adaptively adjusted based on the dimensions of the drum 30 and the dimensions and shape of the portion of the drum 30 that contacts the elastic member 2. The above-described structures are merely examples, and this embodiment does not limit the dimensions of the first elastic layer member 21, the second elastic layer member 22, and the press-fit member 3.

[0086] To further optimize the sealing effect of the elastic member 2, in some embodiments, the first layered elastic member 21 is made of a rubber material, such as a rubber ring; and the second layered elastic member 22 is made of felt or foam. Felt has a fine fiber structure that effectively fills gaps and blocks gas flow. It also has good wear resistance and thermal stability, and can withstand long-term friction without being easily damaged. Rubber has good elasticity and flexibility, and can tightly fit the moving parts during dynamic sealing, compensating for the potential lack of sealing properties of felt. The combination of the two can greatly improve the sealing effect of the elastic member 2, reduce the leakage of airflow and heat during operation of the clothing processing device 100, and prevent impurities such as hair debris from entering the interior of the clothing processing device 100.

[0087] In order to prevent the elastic member 2 from being damaged such as delamination, in some embodiments, the first elastic member 21 and the second elastic member 22 can be fixed by gluing or sewing. The elastic member 2 supported by sewing the first elastic member 21 and the second elastic member 22 has good flexibility and deformability, and is easy to install.

[0088] To ensure that the pressing piece 3 can play its role in fixing the elastic piece 2, please refer to Figure 1-Figure 3 The above-mentioned pressing piece 3 can be fixedly connected to the sealing bracket 1.

[0089] Specifically, the first layered elastic member 21 is provided with a first through-hole 211 , the sealing bracket 1 is provided with a second through-hole 13 matching the first through-hole 211 , and the pressing member 3 is provided with a third through-hole 31 matching the first through-hole 211 .

[0090] When the sealing bracket 1, elastic member 2, and press-fit member 3 are assembled sequentially along the axial direction of the axial sealing unit 10, the second through-hole 13, the first through-hole 211, and the third through-hole 31 are precisely positioned opposite each other. With the help of fasteners inserted through these three through-holes, the press-fit member 3 can closely contact the surface of the first layered elastic member 21 and be firmly fixed to the sealing bracket 1.

[0091] Specifically, in order to ensure that each position of the elastic part 2 in the circumferential direction can be firmly structured with the sealing bracket 1, the number of the above-mentioned first perforations 211 is set to at least two and evenly arranged along the circumference of the pressing part 3, and the number of the first perforations 211, the second perforations 13 and the third perforations 31 are the same.

[0092] The plurality of second perforations 13 are evenly spaced along the circumference of the pressing member 3 , and can evenly apply pressure to the elastic member 2 under the fixing action of the fastener, so that each position of the elastic member 2 can be firmly fixed to the sealing bracket 1 .

[0093] In order to reduce the difficulty of assembling the pressing piece 3 and the sealing bracket 1 , in some embodiments, the axial sealing unit 10 further includes a positioning piece 5 . The positioning piece 5 is used to achieve rapid positioning of the pressing piece 3 and the sealing bracket 1 .

[0094] The positioning member 5 includes a positioning groove 51 and a positioning protrusion 52 , wherein the positioning groove 51 is located at one of the pressing member 3 and the sealing bracket 1 , and the positioning protrusion 52 is located at the other.

[0095] See also Figure 1 The sealing bracket 1 is provided with the aforementioned positioning grooves 51, and the pressing piece 3 is provided with the aforementioned positioning protrusions 52. When the pressing piece 3 is assembled on the sealing bracket 1, by adjusting the positioning protrusions 52 on its circumference relative to the positioning grooves 51 formed on the circumference of the sealing bracket 1, the two can be quickly and initially positioned, effectively improving assembly efficiency. In addition, this structural design can also avoid assembly errors caused by reversed assembly of parts, thereby improving the assembly success rate.

[0096] The pressing member 3 is a rigid structure and can be made of metal or plastic.

[0097] In some embodiments, the pressed part 3 may be a metal part manufactured by a sheet metal process. Compared with other processes, the sheet metal process has lower processing costs and the strength and hardness of the product manufactured are higher.

[0098] In the axial sealing unit 10 provided in the embodiment of the present application, in addition to the elastic member 2, the sealing bracket 1 can also provide a certain degree of elasticity. Under the action of the sealing bracket 1, the elastic member 2 can fit the moving parts more closely during the dynamic sealing process, thereby improving the dynamic sealing effect.

[0099] Furthermore, the axial sealing unit 10 structurally separates the elastic member 2 from the back plate 20. Compared to direct installation on the back plate 20, attaching the elastic member 2 to the seal bracket 1 via snap-fitting effectively simplifies installation. This, combined with the specially designed elastic member 2, can also mitigate the drawbacks of traditional dynamic seals, such as the tendency for felt to wrinkle and experience surface unevenness during installation.

[0100] For operators, installing the elastic member 2 on the back plate 20 presents limited operating space, making it difficult to ensure a perfect fit between the elastic member 2 and the back plate 20 during installation. This can easily lead to wrinkles, which can affect the surface smoothness and sealing performance of the elastic member 2. Furthermore, when the elastic member 2 is affixed to the back plate 20, if the affixation position deviates or the smoothness is poor, it can be difficult for the operator to adjust it. In this embodiment, however, the elastic member 2 is affixed to the sealing bracket 1. Because the sealing bracket 1 is smaller than the back plate and its operating environment is unrestricted, there is greater operating space, allowing the operator to adjust the installation position and post-installation surface topography of the elastic member 2, thereby achieving a smoother assembly. Furthermore, the elastic member 2 is secured by a snap-fitting mechanism, rather than being affixed by adhesive. This avoids the difficulty of adjusting the assembly position associated with adhesive fixation. Furthermore, combined with improvements to the material of the elastic member 2, the elasticity and wrinkle resistance of the elastic member 2 are significantly enhanced, ensuring that the resulting axial sealing unit 10 exhibits superior dynamic sealing performance.

[0101] It can be seen that the sealing bracket 1 provided in the embodiment of the present application is an annular structure as a whole, and is combined with Figure 3 It can be known that the cross-sectional structure of the sealing bracket 1 is an L-shaped or approximately L-shaped bending structure.

[0102] Specifically, the sealing bracket 1 includes a supporting member 11 and a connecting member 12 connected to each other. The supporting member 11 and the connecting member 12 are integrally formed. The elastic member 2 is located on a side of the supporting member 11 facing away from the connecting member 12 .

[0103] The supporting member 11 and the connecting member 12 are connected to form an L-shaped suspension beam structure. When the sealing bracket 1 is squeezed or pushed by an external force from the direction of the elastic member 2, the sealing bracket 1 with a suspension beam structure can bend and deform under the action of the external force. This bending deformation allows the supporting member 11 and the connecting member 12 in the sealing bracket 1 to bear and distribute the squeezing force as a whole, thus preventing the sealing bracket 1 from being damaged by the external force. When the external force is removed, the sealing bracket 1 can return to its original shape through its own elastic restoring force, so that the axial sealing unit 10 can maintain a relatively reliable and stable sealing performance.

[0104] In the axial section of the sealing bracket 1 , the connecting member 12 is connected to the supporting member 11 and remains vertical or approximately vertical.

[0105] In the embodiment of the present application, the above-mentioned connecting member 12 is connected to the radial outer side of the supporting member 11; of course, in other similar embodiments, the connecting member 12 can also be adjusted to be connected to the radial inner side of the supporting member 11 as needed.

[0106] See also Figure 3The axial sealing unit 10 further includes a sealing ring 4, which is located on the side of the sealing bracket 1 facing the rear plate 20. In other words, the sealing ring 4 is located on the side of the connecting member 12 away from the supporting member 11. The sealing ring 4 has a structure that matches the shape of the sealing bracket 1. If the sealing bracket 1 is annular, the sealing ring 4 also has an annular structure.

[0107] When the sealing bracket 1 is fixed to the back plate 20, the opposite sides of the sealing ring 4 contact the sealing bracket 1 and the back plate 20 respectively and undergo elastic deformation under the action of the squeezing force, so that the sealing ring 4 is tightly attached to the opposite side surface of the sealing bracket 1 and the back plate, forming an annular sealing belt with good sealing effect, thereby further improving the sealing effect of the axial sealing unit 10 and reducing the possibility of airflow and heat loss through the assembly gap between the sealing bracket 1 and the back plate 20. For the clothes processing device 100, the axial sealing unit 10 can further improve the drying performance of the clothes processing device 100.

[0108] In order to better position and install the sealing ring 4, a groove 121 is provided on the end of the connecting member 12 facing away from the supporting member 11 to accommodate the sealing ring 4. When the sealing bracket 1 is fixedly installed on the back plate 20, the sealing ring 4 in the groove 121 can be squeezed and deformed and abut against the back plate 20.

[0109] The sealing ring 4 installed in the above-mentioned slot 121 will be compressed to a certain extent, thereby causing elastic deformation. When the sealing bracket 1 is installed on the back plate 20, the sealing ring 4 will be further compressed, causing the sealing ring 4 to elastically deform and maintain a tight fit with the back plate 20, thereby preventing airflow and heat in the above-mentioned enclosed space from leaking out through the gap between the sealing bracket 1 and the back plate 20.

[0110] In order to achieve a fixed connection between the sealing bracket 1 and the back plate 20, please refer to Figure 3 The sealing bracket 1 is provided with a second through-hole 13, and the back plate 20 is provided with a fixing hole corresponding to the second through-hole 13. The sealing bracket 1 can be fixedly mounted on the back plate 20 by fasteners provided through the second through-hole 13 and the fixing hole. Figure 3 In the figure, fasteners and fixing holes are not shown.

[0111] The fastener has the same structure as the fastener described above and can be a screw or other fastening structure with similar fastening function, such as a bolt, a rivet, etc.

[0112] Specifically, the sealing bracket 1 further includes a reinforcement member 14, see Figure 3 The reinforcing member 14 and the connecting member 12 are disposed on the same side of the supporting member 11 and are connected to each other.

[0113] For the detailed structure of the sealing bracket 1, please refer to Figure 4-Figure 7 .

[0114] Figure 4 This is a structural diagram of the sealing bracket 1 in the axial sealing unit 10 provided in an embodiment of the present application. Figure 5 for Figure 4 A magnified view of the structure of area B in the middle. Figure 6 This is a structural diagram of the sealing bracket 1 in the axial sealing unit 10 provided in an embodiment of the present application from another angle. Figure 7 for Figure 6 A magnified view of the structure of area C in the middle.

[0115] The connecting member 12 has a first end 1201 and a second end 1202 opposite to each other. The first end 1201 is used to connect to the back plate 20, and the second end 1202 is used to connect to the supporting member 11. Figure 4 and Figure 5 .

[0116] The supporting member 11 for assembling the elastic member 2 includes a first surface 1101 and a second surface 1102 opposite to each other in the thickness direction, wherein the connecting member 12 is provided on one side of the first surface 1101 in the radial direction, and the elastic member 2 is provided on the second surface 1102. Figure 6 and Figure 7 The aforementioned reinforcement member 14 is also provided on the first surface 1101 .

[0117] Specifically, at least a portion of the second surface 1102 forms an annular assembly surface for assembling the elastic member 2 (the annular assembly surface faces the rotating drum 30 ).

[0118] In order to further reinforce and limit the elastic member 2 and reduce the difficulty of assembling the elastic member 2, in some embodiments, at least a portion of the second surface 1102 is provided with a first limiting member 111 and a second limiting member 112 spaced apart along the radial direction of the sealing bracket 1, and a mounting groove 113 for mounting the elastic member 2 is defined between the first limiting member 111 and the second limiting member 112.

[0119] Specifically, the second stopper 112 is located radially outward from the first stopper 111. The surface of the first stopper 111 facing the second stopper 112 forms a portion of the inner wall of the mounting groove 113. The surface of the second stopper 112 facing the first stopper 111 forms a portion of the inner wall of the mounting groove 113. The assembly surface between the first stopper 111 and the second stopper 112 forms a portion of the bottom wall of the mounting groove 113. The two opposing inner walls and the bottom wall are connected to form the mounting groove 113.

[0120] When the elastic member 2 is assembled in the mounting groove 113, a radial sidewall of the elastic member 2 may contact or abut the first limiting member 111 or the second limiting member 112, or may maintain a certain distance from the first limiting member 111 or the second limiting member 112. The mounting groove 113 is only used to provide an installation position for the elastic member 2 to achieve preliminary assembly and position limiting of the elastic member 2, and is not used to fix the elastic member 2.

[0121] In some embodiments, the first limiting member 111 and the second limiting member 112 are both annular structures and nested with each other to form an annular mounting groove 113. Figure 4 and Figure 5 In the figure, the first limiting member 111 and the second limiting member 112 are both annular structures, and at this time the first limiting member 111 is located on the inner side of the supporting member 11 in the radial direction, and the second limiting member 112 is located on the outer side of the supporting member 11 in the radial direction.

[0122] In other similar embodiments, one of the first limiting member 111 and the second limiting member 112 is an annular structure, and the other is composed of a plurality of arc-shaped side walls or block-shaped side walls arranged at intervals in an annular manner.

[0123] When the sealing bracket 1 is of other non-annular structures, the shape of the first position-limiting member 111 will also be adjusted accordingly, but its orthographic projection in the axial direction always remains a closed figure.

[0124] In order to further improve the elastic deformation and recovery capabilities of the sealing bracket 1 , in addition to improving the material and selecting a material with a higher elastic modulus to manufacture the sealing bracket 1 , the structure of the sealing bracket 1 may also be optimized.

[0125] Specifically, a groove-shaped cross section may be added to the supporting member 11 of the sealing bracket 1 .

[0126] See also Figure 4 and Figure 5 The supporting member 11 is provided with through grooves 114 that pass through both sides of the supporting member 11 in the thickness direction. The number of the through grooves 114 is at least two and they are evenly spaced along the circumference of the sealing bracket 1.

[0127] Any one of the through slots 114 passes through a side of the supporting member 11 away from the connecting member 12 and is spaced apart from the connecting member 12 .

[0128] For example, the connecting member 12 is provided radially outside the supporting member 11. In this case, the through slots 114 are provided radially inside the supporting member 11 and are spaced apart from the connecting member 12 in the radial direction of the supporting member 11. Multiple through slots 114 are arranged in an annular array on the supporting member 11.

[0129] In other similar embodiments, when the connecting member 12 is disposed radially inwardly of the supporting member 11 , the through slot 114 passes through the radially outer side of the supporting member 11 and is spaced apart from the connecting member 12 in the radial direction of the supporting member 11 .

[0130] Specifically, in the radial direction of the support member 11 , the length of the through slot 114 is substantially the same as half the width of the support member 11 . In other similar embodiments, the length of the through slot 114 is slightly less than half the width of the support member 11 .

[0131] See also Figure 5 The through groove 114 passes through a portion of the second surface 1102 of the installation groove 113 and is provided on the supporting member 11 .

[0132] In addition, the supporting member 11 is further provided with the aforementioned positioning groove 51, see Figure 5 The positioning groove 51 is formed on the supporting member 11 and passes through the second limiting member 112 . In other similar embodiments, the positioning groove 51 can also be adjusted to be formed on the radially inner side of the supporting member 11 so as to pass through the first limiting member 111 .

[0133] For the structure of reinforcement 14, please refer to Figure 6 and Figure 7 The reinforcement member 14 includes a first reinforcement plate 141, a second reinforcement plate 142 and a positioning column 143, wherein the first reinforcement plate 141 is an annular structure and is spaced apart from the connector 12 along the radial direction of the sealing bracket 1, the second reinforcement plate 142 is located between the first reinforcement plate 141 and the connector 12 and its two ends in the extension direction are respectively connected to the first reinforcement plate 141 and the connector 12, and the positioning column 143 is located between the first reinforcement plate 141 and the connector 12 and is connected to the first reinforcement plate 141 and the connector 12. The above-mentioned positioning column 143 can be connected to the supporting member 11 and present an integrated structure. The positioning column 143 and the supporting member 11 enclose the above-mentioned second through-hole 13.

[0134] The plurality of positioning posts 143 having the second through-holes 13 are arranged at intervals along the extension direction of the sealing bracket 1, thereby ensuring that each position of the sealing bracket 1 is securely connected to the back plate 20. Furthermore, this ensures that each position of the sealing bracket 1 provides uniform extrusion pressure to the sealing ring 4, ensuring that the sealing ring 4 is tightly fitted to the back plate 20 across the entire contact surface.

[0135] In addition, combined Figure 5 and Figure 7 It can be seen that in the radial direction of the sealing bracket 1 , the first end 1201 of the connecting member 12 protrudes radially outward relative to the second end 1202 to form a protrusion 1203 .

[0136] The connector 12 is provided with a reinforcing rib 122 on the radially outer side of the sealing bracket 1. The reinforcing rib 122 is located on the side of the connector 12 facing away from the supporting member 11 in the radial direction and is connected to the protrusion 1203 located at the first end 1201.

[0137] See also Figure 5 The reinforcing rib 122 extends axially toward the first end 1201 of the sealing bracket 1 to enhance the strength of the connector 12 , especially the strength of the first end 1201 of the connector 12 and the surrounding area.

[0138] Figure 8 This is a schematic structural diagram of the compression fitting 3 in the axial sealing unit 10 provided in an embodiment of the present application. Figure 9 for Figure 8 A magnified view of the structure of region D in the middle. Figure 8 and Figure 9 The pressing piece 3 is a groove-shaped structure with a recessed middle portion. This structure can enhance the strength of the pressing piece 3 to a certain extent, so that it can better cover and fix the elastic piece 2.

[0139] In addition, the annular pressing part 3 is provided with a positioning protrusion 52 on its circumference for realizing rapid assembly of the pressing part 3 and the sealing bracket 1. The positioning protrusion 52 can cooperate with the positioning groove 51 provided on the sealing bracket 1 to quickly realize the initial positioning of the two, thereby improving the assembly efficiency of the axial sealing structure.

[0140] See also Figure 9 The positioning protrusion 52 is arranged on the radially outer side of the pressing piece 3. In other similar embodiments, the positioning protrusion 52 can also be adjusted to the radially inner side of the pressing piece 3 as needed.

[0141] It can be understood that the axial sealing unit 10 provided in the embodiment of the present application can effectively reduce the difficulty of installation and improve the installation flatness of the elastic part 2 by adjusting the structure and utilizing the pressing part 3; at the same time, the sealing bracket 1 is combined with the elastic part 2, and the sealing bracket 1 is utilized to provide a certain axial elastic deformation compensation to the rotating drum 30, thereby forming a stable and sealing-effective axial sealing structure, so as to improve the sealing performance of the sealing structure located at the back plate 20 and reduce the possibility of sealing failure.

[0142] An embodiment of the present application further provides a clothes processing device 100 , which includes the axial sealing unit 10 described in any one of the above items.

[0143] Figure 10 This is a partial structural exploded view of the clothes processing device 100 provided in an embodiment of the present application. Figure 11 This is a partial structural cross-sectional view of the clothes processing device 100 provided in an embodiment of the present application. Figure 12 for Figure 11 A magnified view of the structure of the middle E area. Figure 13 This is a structural diagram of the clothes processing device 100 provided in an embodiment of the present application from another angle. Figure 14 for Figure 13 A magnified view of the structure of region F in the middle.

[0144] See also Figure 10 and Figure 11 The laundry processing device 100 includes a housing and a drum 30, wherein the other structures of the housing except the back plate 20 are not shown in the figure. The back plates 20 of the drum 30 are respectively located on two opposite sides of the axial sealing unit 10 in the axial direction.

[0145] The hot air flow within the laundry processing device 100 is typically generated at the base of the device 100. A fan is installed in the area of ​​the back panel 20 facing the base, and an exhaust port 202 is located in the area facing the drum 30. One end of the fan communicates with the space within the base, and the other end communicates with the exhaust port 202. An air inlet 312 is located at the end of the drum 30 that faces the back panel 20. When the fan is running, it draws air from the base to the exhaust port 202. The air at the exhaust port 202 is then further transported into the drum 30 through the air inlet 312, thereby drying, reversing, and performing other processing on the clothing within the drum 30.

[0146] In order to prevent air from leaking out through the gap between the rear plate 20 and the drum 30 during the process of air flowing from the exhaust port 202 to the air inlet 312, thereby affecting the processing efficiency of the clothing processing apparatus 100, an axial sealing structure, namely the axial sealing unit 10 described above, is required between the rear plate 20 and the drum 30, which have the exhaust port 202 and the air inlet 312. The sealing bracket 1 is disposed around the air inlet 312 and the exhaust port 202 to ensure that the surrounding areas of the air inlet 312 and the exhaust port 202 are enclosed, thereby preventing air from leaking through the air inlet 312 and the exhaust port 202.

[0147] In addition, the above-mentioned axial sealing unit 10 can also prevent hair debris, steam, etc. formed in the drum 30 or carried by the air flow from leaking into the interior of the clothing processing device 100, which helps to ensure the electrical safety inside the clothing processing device 100 and the durability of the clothing processing device 100.

[0148] The drum 30 is rotatably disposed within the housing and is configured to accommodate laundry to be processed. A flange 311 extending circumferentially and projecting toward the back plate 20 is provided on a rear end surface 301 of the drum 30 facing the back plate 20. The drum 30 can mate with the elastic member 2 via the flange 311 projecting from the back plate 20, thereby abutting against the axial sealing unit 10 via the flange 311.

[0149] When the elastic member 2 and the rotating drum 30 abut against each other, a concave abutting groove is provided on the surface of the elastic member 2 facing the rotating drum 30. Figure 12 , the flange 311 of the drum 30 contacts the elastic member 2 through the abutting groove.

[0150] The abutment groove can increase the contact area between the flange 311 and the elastic member 2, which helps to enhance the sealing effect between the drum 30 and the sealing structure.

[0151] Specifically, the flange 311 may be formed by a portion of the rear end surface 301 of the drum 30 being recessed toward one side of the rear back plate 20 .

[0152] In some embodiments, the flange 311 is an annular structure, which can avoid assembly errors to a certain extent and ensure uniform sealing between each position of the drum 30 and the axial sealing unit 10 .

[0153] To simplify assembly of the axial seal unit 10 onto the back plate 20, a fourth through-hole 201 is provided on the back plate 20 to mate with the second through-hole 13. The aforementioned fastener can pass through the fourth through-hole 201 and be secured to the back plate 20, thereby securing the axial seal unit 10 to the back plate 20.

[0154] In order to enhance the connection strength and firmness between the back plate 20 and the fastener, and to prevent the fourth through hole 201 from being worn and causing assembly failure due to long-term vibration and abutment force, in some embodiments, the edge of the fourth through hole 201 is folded toward the side facing away from the axial sealing unit 10 to form a flange, see Figure 13 and Figure 14 .

[0155] The flange structure can enhance the reliability and stability of the assembly between the axial sealing bracket 1 and the back plate 20 .

[0156] The laundry processing device 100 provided in the embodiment of the present application includes any one or more of the above-mentioned axial sealing units 10 , and the beneficial effects thereof will not be described in detail here.

[0157] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0158] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An axial sealing unit, applied to a clothes processing device with a drying function, wherein the clothes processing device has a rotating drum, characterized in that: include: A sealing bracket is fixedly mounted on a side of the back plate facing the rotating drum; an elastic member, provided on a side of the sealing bracket facing the rotating drum; a pressing piece, covering a portion of the elastic piece and fixedly connected to the sealing bracket, wherein a portion of the surface of the elastic piece is raised relative to the pressing piece toward a side away from the sealing bracket; The surface of the elastic member protruding from the pressing member can rotatably abut against one end of the rotating drum axially close to the sealing bracket, and the sealing bracket can generate elastic deformation when the rotating drum abuts against the elastic member.

2. The axial sealing unit according to claim 1, characterized in that The sealing bracket is an annular structure, comprising a supporting member and a connecting member connected to each other, the supporting member and the connecting member being integrally formed, and the elastic member being located on a side of the supporting member facing away from the connecting member; The connecting member has a first end and a second end opposite to each other, the first end is used to be connected to the back plate, and the second end is connected to the supporting member; The supporting member has a first surface and a second surface relative to each other, the connecting member is arranged on one side of the first surface in the radial direction, the elastic member is arranged on the second surface, and at least a part of the surface of the second surface is protruded with a first limiting member and a second limiting member arranged at intervals along the radial direction of the sealing bracket, and an installation groove for installing the elastic member is defined between the first limiting member and the second limiting member.

3. The axial sealing unit according to claim 2, characterized in that At least two through slots are provided through the supporting member, and any one of the through slots passes through an end of the supporting member away from the connecting member and is spaced apart from the connecting member.

4. The axial sealing unit according to claim 2, characterized in that The axial sealing unit further includes a sealing ring. A groove for accommodating the sealing ring is recessed on a side of the connecting member facing the rear back plate. When the connecting member is fixedly mounted on the rear back plate, the sealing ring abuts against the rear back plate.

5. The axial sealing unit according to claim 2, characterized in that In the radial direction of the sealing bracket, the first end protrudes relative to the second end to form a convex portion. A reinforcing rib connected to the protruding portion is provided on a side of the connecting member facing away from the supporting member, and the reinforcing rib extends along the axial direction of the sealing bracket toward the location of the first end.

6. The axial sealing unit according to any one of claims 2 to 5, characterized in that: The elastic member is an annular structure, comprising a first layered elastic member and a second layered elastic member fixedly connected, wherein the first layered elastic member is located between the sealing bracket and the second layered elastic member, and the radial length of the first layered elastic member is greater than the radial length of the second layered elastic member; The pressing piece is covered on a side of the first layered elastic piece facing away from the sealing bracket and is adjacent to the second layered elastic piece. The second layered elastic piece protrudes relative to the pressing piece toward a side facing away from the sealing bracket.

7. The axial sealing unit according to claim 6, characterized in that Along the radial direction of the elastic member, the pressing member is located outside the second layered elastic member.

8. The axial sealing unit according to claim 6, characterized in that The first layered elastic member is provided with a first through-hole, the sealing bracket is provided with a second through-hole cooperating with the first through-hole, the pressing member is provided with a third through-hole cooperating with the first through-hole, and the pressing member is fixedly connected to the sealing bracket via a fastener provided through the third through-hole, the first through-hole, and the second through-hole; The number of the first through-holes is at least two, and the numbers of the first through-holes, the second through-holes, and the third through-holes are the same.

9. The axial sealing unit according to claim 8, characterized in that The sealing bracket further includes a reinforcing member, which is provided on the first surface and connected to the connecting member; The reinforcement member includes a first reinforcement plate, a second reinforcement plate and a positioning post, the first reinforcement plate is annular and is spaced apart from the connecting member along the radial direction of the sealing bracket, the second reinforcement plate connects the first reinforcement plate and the connecting member, and the positioning post is located between the first reinforcement plate and the connecting member and is connected to the first reinforcement plate and the connecting member; The positioning column and the supporting member are connected to form the second through hole.

10. The axial sealing unit according to claim 5, characterized in that The connecting member is connected to the radial outer side of the supporting member.

11. A clothes processing device, characterized in that: include: A housing comprising a back plate and an axial sealing unit according to any one of claims 1 to 10; a drum rotatably disposed in the housing, the drum being configured to accommodate laundry to be processed, the drum having a flange extending circumferentially and protruding toward the back plate on a rear end surface thereof facing the back plate, the flange being matched with the elastic member; The rotating drum abuts against the axial sealing unit via the flange.

12. The clothes treating device according to claim 11, characterized in that: The flange is formed by the rear end surface being recessed toward one side of the rear back plate; And / or, the flange is an annular structure.

13. The clothes treating apparatus according to claim 11, characterized in that: An exhaust port is provided on the back plate, an air inlet is provided on the rear end surface of the drum, and the sealing bracket is arranged around the exhaust port and the air inlet; The air flow flows into the drum through the exhaust port and the air inlet.

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