Rotating shaft assembly and dehumidifier

Abstract

The utility model relates to a rotating shaft assembly and a dehumidifier, and the rotating shaft assembly comprises a central sleeve which is arranged at the rotating axis of a rotating wheel; the two elastic buckles are connected to the center sleeve in a sliding mode in the radial direction of the rotating wheel and can move between a locking position and an unlocking position; and the elastic piece is arranged between the two elastic buckles. According to the rotating shaft assembly and the dehumidifier, stable installation and convenient disassembly of the dehumidification rotating wheel are achieved, the rotating wheel can be rapidly released or fixed through simple operation of pressing the elastic buckle, the whole process is easy, convenient and rapid to operate, professional tools and skills are not needed, a common user can independently complete operation, and the practicability is high. And the risk of equipment damage possibly caused by complex disassembly and assembly operation is effectively reduced, the service life of the dehumidifier is effectively prolonged, and the use experience of a user when the rotating wheel is maintained and replaced is greatly improved.

Description

Technical Field

[0001] This application relates to the field of air handling equipment technology, and in particular to a shaft assembly and a dehumidifier. Background Technology

[0002] A rotary dehumidifier is a commonly used air humidity control device, widely used in homes, industries, and commerce. A typical rotary dehumidifier includes a frame, an air duct within the frame, a rotor within the air duct, a drive mechanism to rotate the rotor, and other components for air processing (such as a fan, heater, and heat exchanger). Air flows through the rotor under the action of the fan, and the moisture-absorbing material on the rotor absorbs moisture from the air, thus achieving dehumidification.

[0003] However, existing rotary dehumidifiers are prone to the following problems during long-term use: First, since rotary dehumidifiers typically operate in an air environment, the air inevitably contains dust, impurities, and other particulate matter. These particles enter the dehumidifier with the air and gradually accumulate in the honeycomb channels of the rotor, causing blockage. This blockage reduces the rotor's moisture absorption efficiency, directly leading to a decline in dehumidification performance. Second, during operation, rotary dehumidifiers require heating and regeneration of the rotor to release adsorbed moisture. Prolonged high-temperature baking, especially when temperature control is inaccurate, can easily cause deformation of the rotor material, such as deformation of the honeycomb channels or a reduction in the size of the openings. This rotor deformation also reduces airflow efficiency and moisture absorption area, further affecting the dehumidification effect.

[0004] Traditionally, if the dehumidifier rotor becomes clogged or deformed, the entire unit is scrapped. Replacing the rotor is extremely complicated. In existing dehumidifier structures, the rotor is usually fixed inside the frame, making replacement very inconvenient. Users need to use tools like screwdrivers to disassemble the dehumidifier's outer casing to access the internal space where the rotor is located. Furthermore, because the rotor is usually tightly connected to other functional modules of the dehumidifier (such as the fan, heater, and air ducts), these related components often need to be removed before removing the rotor to make room for its removal. For example, it may be necessary to disassemble the processing air generation module and the regeneration air generation module connected to the rotor module.

[0005] Because the disassembly process is complicated, involving the removal and assembly of multiple components, and requires certain professional knowledge and skills, the replacement of the impeller usually needs to be performed by professional repair personnel. Ordinary users cannot perform it themselves, resulting in high maintenance costs and a long time consumption. Utility Model Content

[0006] To address the aforementioned issues, this application provides a shaft assembly and dehumidifier that enables convenient replacement and maintenance of the dehumidification wheel through a pull-out wheel module design.

[0007] To achieve the above objectives, in a first aspect, embodiments of this application provide a rotating shaft assembly for detachably mounting a rotor of a rotary dehumidifier thereon, comprising:

[0008] The center sleeve is located at the rotation axis of the rotating wheel;

[0009] Two opposing spring clips are slidably connected to the central sleeve along the radial direction of the rotating wheel, and can move between a locked position and an unlocked position;

[0010] An elastic element is disposed between the two spring clips;

[0011] When not subjected to external force, the two spring clips are in the locked position, and the two spring clips lock the rotating wheel to the central sleeve through the elastic force of the elastic element; when subjected to external force, the two spring clips move from the locked position to the unlocked position so that the rotating wheel can be removed from the central sleeve.

[0012] A further embodiment is that each of the two snap-fit ​​buttons has a locking part on its opposite side; in the locked position, the locking part protrudes from the outer peripheral surface of the central sleeve and abuts against the inner peripheral wall of the rotating wheel; in the unlocked position, the locking part is received inside the central sleeve.

[0013] A further embodiment is that the surface of the clamping part that abuts against the rotating wheel is an arc surface that matches the inner circumferential wall of the rotating wheel, and an anti-slip structure is provided on the arc surface.

[0014] A further embodiment is that a groove is formed on the outer peripheral wall of the central sleeve, extending through both radial sides of the central sleeve. The spring buckle is slidably disposed in the groove, and the elastic element is a spring disposed in the groove and abutting against the two spring buckles. When the spring buckle is in the locked position and the unlocked position, the spring is in a compressed state.

[0015] A further option is to provide pressing parts on the two spring clips that are suitable for human hand operation.

[0016] A further embodiment is that one end of the central sleeve is covered with an end cap to prevent the snap fastener from dislodging from the central sleeve. The end cap is provided with a limiting groove communicating with the slide groove at the position of each snap fastener. The pressing part of the snap fastener extends out from the corresponding limiting groove. The limiting groove is used to limit the movement range of the pressing part.

[0017] Secondly, embodiments of this application provide a dehumidifier, the dehumidifier including a frame, an air duct provided within the frame, and a rotating shaft assembly, an outer frame, and a mounting bracket. One side of the mounting bracket has a support arm extending into the air duct. The rotating wheel is detachably housed within the outer frame via the rotating shaft assembly. The outer frame is fixedly connected to one end of the central sleeve and rotatably mounted on the distal end of the support arm via the rotating shaft assembly. The rotating shaft assembly, the rotating wheel, the outer frame, and the mounting bracket form a rotating wheel module. The frame is provided with a pull-out opening suitable for inserting and removing the rotating wheel module. The rotating shaft assembly is the rotating shaft assembly described in any embodiment of the first aspect.

[0018] A further embodiment is that the distal end of the support arm is provided with a support shaft arranged coaxially with the central sleeve, and a bearing is provided inside the central sleeve. One end of the support shaft is inserted into the inner ring of the bearing and connected and fixed to the inner ring, so that the central sleeve can rotate relative to the support arm.

[0019] A further embodiment includes an annular baffle inside the central sleeve, with the outer ring of the bearing interference-fitted with the inner circumferential wall of the central sleeve, and one end of the bearing abutting against the side of the annular baffle facing the support arm; the support arm has an annular protrusion surrounding the outer circumference of the support shaft, one end of which extends into the central sleeve and abuts against the other end of the bearing; one end of the support shaft is connected to a screw, with the screw nut pressing against the side of the annular baffle away from the bearing.

[0020] A further embodiment is that the inner circumferential wall of the central sleeve is provided with a plurality of protrusions spaced in an annular manner, the plurality of protrusions forming a fixed cavity for receiving the bearing, the outer ring of the bearing abutting against each of the protrusions, and the end of the protrusions being provided with a guide slope to facilitate the insertion and assembly of the bearing into the fixed cavity.

[0021] The shaft assembly and dehumidifier designed in this application aim to achieve stable installation and convenient disassembly of the dehumidification rotor. Specifically, the rotor can be quickly released or fixed by simply pressing the spring clip. The whole process is simple and quick, requiring no professional tools or skills, and can be completed independently by ordinary users. This effectively reduces the risk of equipment damage that may be caused by complex disassembly and assembly operations, effectively extends the service life of the dehumidifier, and greatly improves the user experience when maintaining and replacing the rotor. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the rotating shaft assembly provided in the embodiments of this application.

[0023] Figure 2 This is a schematic diagram of the planar structure of the rotating shaft assembly provided in the embodiments of this application.

[0024] Figure 3 yes Figure 2 Sectional view at point AA.

[0025] Figure 4 This is an exploded perspective view of the rotating shaft assembly provided in the embodiments of this application.

[0026] Figure 5 This is a schematic diagram of the structure of the central sleeve provided in the embodiment of this application.

[0027] Figure 6 This is an assembly diagram of the rotary module provided in the embodiments of this application.

[0028] The components include: a rotating wheel 100, a gear ring 101, a rotating wheel module 200, a center sleeve 10, a sliding groove 11, an end cover 12, a limiting groove 13, an annular baffle 14, a protruding strip 15, a guide slope 16, a spring buckle 20, a clamping part 21, a pressing part 22, an elastic element 30, a frame 40, a pull-out port 41, a drive wheel 42, a sliding groove 43, an outer frame 50, a mounting bracket 60, a pull-out position 61, a support arm 70, a support shaft 71, an annular protrusion 72, a screw 73, and a bearing 80. Detailed Implementation

[0029] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0030] In a first aspect, embodiments of this application provide a rotating shaft assembly for detachably mounting the rotor 100 of a rotary dehumidifier, aiming to facilitate convenient replacement and maintenance of the rotor. For example... Figures 1 to 6 As shown, the component mainly includes a central sleeve 10, spring clips 20, and an elastic element 30. In this embodiment, two spring clips 20 are arranged opposite each other, and the elastic element 30 is arranged between the two spring clips 20. It is used to provide the two spring clips 20 with a driving force to lock the rotating wheel 100 to the central sleeve 10, and to drive the spring clips 20 to reset to the locked position after the external force is released.

[0031] The center sleeve 10 is preferably a hollow cylindrical sleeve structure, which is fixed in the center hole of the rotating wheel 100 and serves as the axis around which the rotating wheel 100 rotates; the two spring buckles 20 are slidably connected to the center sleeve 10 in a relative manner along the radial direction of the rotating wheel 100, and the two spring buckles 20 can move between the locked position and the unlocked position.

[0032] Specifically, when the two spring clips 20 are not subjected to external force, they are in the locked position. The two spring clips 20 lock the rotating wheel 100 to the central sleeve 10 by the elastic force of the elastic element 30, preventing the rotating wheel 100 from falling off along the central sleeve 10 axis. When the two spring clips 20 are pressed by external force, they move from the locked position to the unlocked position, so that the rotating wheel 100 can be removed from the central sleeve 10. When it is necessary to disassemble the rotating wheel 100, the operator only needs to apply external force to press the two spring clips 20 until the elastic force of the elastic element 30 is overcome, so that the two spring clips 20 move from the locked position to the unlocked position. That is, in the unlocked position, the locking structure of the spring clips 20 will completely retract into the center sleeve 10, or at least no longer obstruct or restrict the position of the rotating wheel 100 in the axial direction of the center sleeve 10. At this time, the locking state between the rotating wheel 100 and the rotating shaft assembly is released, and the user can easily and quickly remove the rotating wheel 100 from the center sleeve 10 for subsequent cleaning, inspection or replacement operations without the need for additional tools or professional skills.

[0033] In some embodiments, such as Figure 3 , Figure 4 , Figure 5 As shown, each of the two snap-fit ​​buttons 20 has a locking part 21 on one side facing away from each other. In the locked position, the locking part 21 protrudes from the outer peripheral surface of the central sleeve 10 and abuts against the inner peripheral wall of the rotating wheel 100. This direct physical contact and abutment can provide an effective radial locking force to prevent the rotating wheel 100 from shaking or radially displacing relative to the central sleeve 10 during normal operation. In the unlocked position, the locking part 21 is housed in the central sleeve 10 and no longer contacts or applies locking force to the inner peripheral wall of the rotating wheel 100, making it easy to unlock.

[0034] In some embodiments, such as Figure 5 As shown, the surface of the locking part 21 that abuts against the rotating wheel 100 is an arc surface that matches the inner peripheral wall of the rotating wheel 100. This arc surface achieves surface contact with the inner peripheral wall of the rotating wheel 100, providing a larger actual contact area to improve the reliability and stability of the locking. Simultaneously, to prevent possible slight slippage or free rotation, an anti-slip structure is provided on the arc surface to increase the friction between the arc surface and the rotating wheel. In this embodiment, the anti-slip structure can be used individually or in combination, including various forms such as protrusions, grooves, raised strips, and anti-slip textures. For example, in one specific implementation of this embodiment, fine protrusions can be evenly arranged on the arc surface. These protrusions can embed into the minute unevenness of the inner wall of the rotating wheel during locking, further increasing the coefficient of friction and ensuring the stability of the locking.

[0035] In some embodiments, such as Figure 3 , Figure 5 , Figure 6As shown, a groove 11 is formed on the outer peripheral wall of the central sleeve 10, extending radially through both sides of the central sleeve 10. The spring clip 20 is slidably disposed in the groove 11, allowing the spring clip 20 to slide freely only in the radial direction of the central sleeve 10, ensuring stable operation. The elastic element 30 is a spring disposed within the groove 11 and abutting against the two spring clips 20. When the spring clip 20 is in the locked and unlocked positions, the spring is in a compressed state. In specific implementation, as shown... Figure 3 As shown, mounting holes are recessed on the inner surfaces of the two spring clips 20 facing each other, and the two ends of the elastic element 30 are fitted into the corresponding mounting holes to improve the stability of the elastic element 30 when it is compressed and restored.

[0036] In some embodiments, such as Figure 3 , Figure 4 As shown, the two spring clips 20 are provided with pressing parts 22 that are suitable for human hand operation. The protruding pressing parts 22 are directly exposed to the outside of the central sleeve, providing the user with a clearly visible and easily accessible operating area. The protruding shape can provide a better finger contact point and friction, making it easier for the user to apply pressing force to unlock.

[0037] In some embodiments, such as Figure 3 , Figure 4 As shown, one end cap of the central sleeve 10 is provided with an end cap 12 to prevent the spring clips 20 from dislodging from the central sleeve 10. The end cap 12 has a limiting groove 13 corresponding to the position of each spring clip 20, which communicates with the slide groove 11. The pressing part 22 of the spring clip 20 extends out from the corresponding limiting groove 13. The limiting groove 13 is used to limit the movement range of the pressing part 22. In this embodiment, the end cap 12 serves as a closed structure at the axial end of the central sleeve 10. Specifically, it can be locked onto the central sleeve 10 by two screws. The main function of the end cap 12 is to physically prevent the spring clips 20 from moving along the axial direction of the central sleeve 10 and dislodging from the central sleeve 10. At the same time, the limiting groove 13 on the end cap 12 limits the sliding stroke of the pressing part 22 on the spring clip 20, which can prevent the user from excessively pressing the pressing part 22 during operation, avoid blindly applying force, and thus prevent the spring 30 from being over-compressed, resulting in damage or shortened life.

[0038] Secondly, this application provides a dehumidifier, which includes a frame 40 with an air duct inside. It also includes a rotating shaft assembly, an outer frame 50, and a mounting bracket 60 as described in any embodiment of the first aspect. One side of the mounting bracket 60 has a support arm 70 extending into the air duct. The rotating wheel 100 is detachably housed in the outer frame 50 via the rotating shaft assembly. The outer frame 50 is fixedly connected to one end of the central sleeve 10 and is rotatably mounted on the far end of the support arm 70 away from the mounting bracket 60 via the rotating shaft assembly. The rotating shaft assembly, the rotating wheel 100, the outer frame 50, and the mounting bracket 60 form a rotating wheel module 200. The frame 40 is provided with a pull-out port 41 suitable for inserting and removing the rotating wheel module 200.

[0039] Through the above structure, the rotating shaft assembly, the rotating wheel 100, the outer frame 50, and the mounting bracket 60 are integrated to form an independent rotating wheel module 200. This rotating wheel module 200 is designed to avoid direct connection with other functional components commonly found in dehumidifiers, such as dehumidification, heat exchange, airflow drive, or heating. Therefore, when maintenance or replacement of the rotating wheel 100 is required, the user does not need to perform complex disassembly operations; they can easily remove the entire rotating wheel module 200 from the dehumidifier simply through the pull-out port 41 on the frame 40. For ease of operation, the mounting bracket 60 has a hollow handle position 61 on the side away from the rotating wheel 100. Due to the independence of the rotating wheel module 200, operations such as cleaning, inspection, or replacement of the rotating wheel 100 can be performed after the module is removed. For example, the user can simply press the spring clip 20 on the rotating shaft assembly to remove the rotating wheel 100 from the outer frame 50, providing more spacious operation and a more convenient and faster process.

[0040] To further improve the smoothness and guidance of the pull-out of the rotary module 200, in a specific example, a groove 43 adapted to the support arm 70 on the mounting bracket 60 can be provided on the inner wall of the pull-out opening 41. The groove 43 can provide precise guidance for the insertion and removal of the rotary module 200, ensuring the stability and smoothness of the rotary module 200 during movement. In addition, to firmly fix the rotary module 200 after assembly and prevent accidental movement or loosening during use, an elastic hook can be provided on the mounting bracket 60. When the rotary module 200 is fully pushed into the pull-out opening 41, the elastic hook can engage with the fastener provided on the inner wall of the pull-out opening 41 to reliably fix the position of the rotary module 200.

[0041] In some embodiments, such as Figure 3 As shown, a support shaft 71, coaxially arranged with the central sleeve 10, is provided at the distal end of the support arm 70. A bearing 80 is installed inside the central sleeve 10. One end of the support shaft 71 is inserted into and fixed to the inner ring of the bearing 80, allowing the central sleeve 10 to rotate relative to the support arm 70. Thus, the support shaft 71, acting as a fixed center of rotation, cooperates with the bearing 80 to provide reliable physical support for the rotational movement of the entire wheel 100. In a specific example, such as... Figure 6 As shown, it also includes a drive assembly for driving the rotation of the wheel. The drive assembly includes a drive motor fixed on the frame 40 and a drive wheel 42 rotatably mounted on the frame 40. The output shaft of the drive motor is connected to the drive wheel 42. A gear ring 101 is sleeved on the outer circumference of the wheel 100. The drive wheel 42 extends into the pull-out port 41 and meshes with the gear ring 101 to stably drive the wheel 100.

[0042] In some embodiments, such as Figure 3 , Figure 5As shown, an annular baffle 14 is provided inside the central sleeve 10. The outer ring of the bearing 80 is interference-fitted with the inner circumferential wall of the central sleeve 10. One end of the bearing 80 abuts against the side of the annular baffle 14 facing the support arm 70. An annular protrusion 72 is provided on the support arm 70, which surrounds the outer circumference of the support shaft 71. One end of the annular protrusion 72 extends into the central sleeve 10 and abuts against the other end of the bearing 80. One end of the support shaft 71 is connected to a screw 73. The nut of the screw 73 is pressed against the side of the annular baffle 14 away from the bearing 80.

[0043] With this structural design, the annular baffle 14 and the annular protrusion 72 on the support arm 70 are located on both sides of the bearing 80, forming a bidirectional axial constraint on the bearing 80. At the same time, the axial fixing force can be further enhanced by pressing the annular baffle 14 with screws 73 and nuts, effectively preventing the bearing from axially moving or loosening in the center sleeve 10. The structure is simple and easy to assemble.

[0044] In some embodiments, such as Figure 5 As shown, the inner circumferential wall of the center sleeve 10 is provided with multiple circumferentially spaced protrusions 15, which form a fixed cavity for housing the bearing 80. The outer ring of the bearing 80 abuts against each protrusion 15, and the end of each protrusion 15 is provided with a guide slope 16 to facilitate the insertion of the bearing 80 into the assembly fixed cavity. The protrusions 15 facilitate the assembly of the bearing 80 and also facilitate the removal, replacement, and maintenance of the bearing 80; while the guide slope 16 guides the outer ring of the bearing 80 to slide smoothly into place, reducing installation resistance and improving assembly efficiency.

[0045] The rotating shaft assembly and dehumidifier provided in this embodiment are designed to achieve stable installation and convenient disassembly of the dehumidification rotor. Specifically, the rotor can be quickly released or fixed by simply pressing the spring clip. The entire process is simple and quick, requiring no professional tools or skills, and can be completed independently by ordinary users. This effectively reduces the risk of equipment damage that may be caused by complex disassembly and assembly operations, effectively extends the service life of the dehumidifier, and greatly improves the user experience when maintaining and replacing the rotor.

[0046] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0047] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0048] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rotating shaft assembly for detachably mounting a rotating wheel of a rotary dehumidifier to a rotating shaft, characterized in that, include: The center sleeve is located at the rotation axis of the rotating wheel; Two opposing spring clips are slidably connected to the central sleeve along the radial direction of the rotating wheel, and can move between a locked position and an unlocked position; An elastic element is disposed between the two spring clips; When not subjected to external force, the two spring clips are in the locked position, and the two spring clips lock the rotating wheel to the central sleeve through the elastic force of the elastic element; when subjected to external force, the two spring clips move from the locked position to the unlocked position so that the rotating wheel can be removed from the central sleeve.

2. The hinge assembly of claim 1, wherein, Both of the two snap-fit ​​buttons have locking parts on opposite sides; in the locked position, the locking parts protrude from the outer circumferential surface of the central sleeve and abut against the inner circumferential wall of the rotating wheel; in the unlocked position, the locking parts are housed within the central sleeve.

3. The hinge assembly of claim 2, wherein, The surface of the clamping part that abuts against the rotating wheel is an arc surface that matches the inner circumferential wall of the rotating wheel, and an anti-slip structure is provided on the arc surface.

4. The hinge assembly of claim 1, wherein, The outer peripheral wall of the central sleeve is provided with a sliding groove that runs through both radial sides of the central sleeve. The spring buckle is slidably disposed in the sliding groove. The elastic element is a spring disposed in the sliding groove and abutting between the two spring buckles. When the spring buckle is in the locked position and the unlocked position, the spring is in a compressed state.

5. The hinge assembly of claim 4, wherein, The two spring clips are provided with pressing parts suitable for human hand operation.

6. The hinge assembly of claim 5, wherein, One end of the central sleeve is covered with an end cap to prevent the snap fastener from dislodging from the central sleeve. The end cap is provided with a limiting groove communicating with the slide groove at the position of each snap fastener. The pressing part of the snap fastener extends out from the corresponding limiting groove. The limiting groove is used to limit the movement range of the pressing part.

7. A dehumidifier comprising a cabinet, said cabinet having an air duct provided therein, characterized in that, It also includes a pivot assembly, an outer frame, and a mounting bracket. One side of the mounting bracket has a support arm extending into the air duct. The wheel is detachably housed within the outer frame via the pivot assembly. The outer frame is fixedly connected to one end of the central sleeve and rotatably mounted on the distal end of the support arm via the pivot assembly. The pivot assembly, wheel, outer frame, and mounting bracket form a wheel module. The frame is provided with a pull-out opening suitable for inserting and removing the wheel module. The pivot assembly is the pivot assembly as described in any one of claims 1-6.

8. The dehumidifier of claim 7, wherein, The distal end of the support arm is provided with a support shaft arranged coaxially with the central sleeve. A bearing is provided inside the central sleeve. One end of the support shaft is inserted into the inner ring of the bearing and connected and fixed to the inner ring, so that the central sleeve can rotate relative to the support arm.

9. The dehumidifier of claim 8, wherein, An annular baffle is provided inside the central sleeve. The outer ring of the bearing is interference-fitted with the inner circumferential wall of the central sleeve. One end of the bearing abuts against the side of the annular baffle facing the support arm. An annular protrusion is provided on the support arm, surrounding the outer circumference of the support shaft. One end of the annular protrusion extends into the central sleeve and abuts against the other end of the bearing. A screw is connected to one end of the support shaft, and the nut of the screw is pressed against the side of the annular baffle away from the bearing.

10. The dehumidifier of claim 9, wherein, The inner circumferential wall of the central sleeve is provided with a plurality of protrusions spaced in an annular manner. The plurality of protrusions form a fixed cavity for receiving the bearing. The outer ring of the bearing abuts against each of the protrusions. The end of each protrusion is provided with a guide slope to facilitate the insertion and assembly of the bearing into the fixed cavity.

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