Scrubbing mechanism for centrifugal blower

Abstract

The utility model provides a scrubbing mechanism for a centrifugal blower, which belongs to the field of centrifugal blowers, the centrifugal blower comprises an end cover, an impeller and an angle adjusting device, the end cover is provided with an air inlet and an accommodating chamber, the accommodating chamber is provided with a window, the impeller is provided with straight blades, and the angle adjusting device is arranged on the end cover. The scrubbing mechanism comprises a first driving mechanism, a first support, a second driving structure, a third driving structure, a second support and a position detection unit, the first driving mechanism is connected with the impeller, the first support is movably arranged in the containing cavity, the first support is slidably provided with a first electro-magnetic device, and the first electro-magnetic device is provided with a first scrubbing piece; the second driving structure is arranged on the end cover, the third driving structure is arranged on the first support, the second support is in sliding connection with the first electro-magnetic generation device, the second support is provided with a second electro-magnetic generation device, the second electro-magnetic generation device is provided with a second scrubbing piece, and the position detection unit is used for detecting the position of the blade. According to the impeller scrubbing device, the impeller can be efficiently scrubbed without dismounting the end cover.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal blowers, in particular to a scrubbing mechanism for centrifugal blowers. Background Art

[0002] A centrifugal blower is a common fluid machine that uses the rotation of an impeller to generate centrifugal force, sucking in gas from the air inlet and accelerating it in the radial direction, and finally converting kinetic energy into pressure energy through a diffuser to transport the gas.

[0003] During the operation of a centrifugal blower, dust may gradually accumulate on the impeller due to the inhalation of dusty gas. This dust accumulation will have an adverse effect on the performance of the blower, including reducing the efficiency of the blower, increasing energy consumption, causing vibration and noise, and in severe cases may even cause damage or failure of the impeller. For this reason, the impeller needs to be scrubbed regularly. At present, it is generally necessary to remove the end cover first to fully expose the impeller, and then manually use a vacuum cleaner or compressed air to gently remove the dust on the impeller surface to ensure that the impeller surface is not damaged during the cleaning process.

[0004] However, when the impellers are large or numerous, using this method will consume a lot of manpower, and the scrubbing operation will take a long time, which will extend the downtime of the centrifugal blower and reduce the use efficiency of the centrifugal blower. Utility Model Content

[0005] Based on this, the purpose of the utility model is to provide a scrubbing mechanism for a centrifugal blower, which is designed to efficiently scrub the impeller without disassembling the end cover.

[0006] To achieve the above-mentioned purpose, the utility model provides a scrubbing mechanism for a centrifugal blower, the centrifugal blower comprising an end cover, an impeller, and an angle adjustment device, the end cover is provided with an air inlet and a accommodating chamber, the accommodating chamber is provided with an openable and closable window, the impeller is provided with a plurality of straight blades distributed at intervals, the window can cover at least one of the blades, the angle adjustment device is used to adjust the inclination angle of the blade, the scrubbing mechanism for the centrifugal blower comprises a first driving mechanism, a first bracket, a second driving structure, a third driving structure, a second bracket, and a position detection unit, the first driving mechanism is drivingly connected to the impeller to drive the impeller to rotate, the first bracket is movably arranged in the accommodating chamber, the first bracket is slidably provided with a first electromagnetism device, the first electromagnetism device is provided with a first scrubbing member, and the second driving mechanism is provided with a first electromagnetism device. A dynamic structure is arranged on the end cover to drive the first bracket to extend out of the accommodating chamber from the window and to extend into the accommodating chamber from the window. A third driving structure is arranged on the first bracket to drive the first electromagnetism device to slide on the first bracket and the sliding direction is parallel to the extension direction of the blade. The second bracket is slidably connected to the first electromagnetism device. The second bracket is provided with a second electromagnetism device. The second electromagnetism device is provided with a second scrubbing member corresponding to the position of the first scrubbing member. The position detection unit is used to detect the position of the blade relative to the window. When the first electromagnetism device and the second electromagnetism device are of the same polarity, the second electromagnetism device is away from the first electromagnetism device. When the first electromagnetism device and the second electromagnetism device are of opposite polarity, the second electromagnetism device is close to the first electromagnetism device.

[0007] The beneficial effects of the utility model include at least: by movably providing a first bracket in the accommodating chamber, the first bracket can be moved when scrubbing the blades, and the first electromagnetism device can slide on the first bracket, and the sliding direction is parallel to the extension direction of the blades, and the second electromagnetism device can be attracted by the first electromagnetism device, so that the two can clamp the blades and scrub along the extension direction of the blades, and in addition, in conjunction with the position detection unit and the first driving mechanism, each blade can be scrubbed, and the whole process is fully automated, without the need for human intervention or disassembly of the blower, thereby improving the efficiency of the scrubbing operation compared to the prior art.

[0008] In addition, the centrifugal blower scrubbing mechanism according to the utility model may also have the following additional technical features:

[0009] Furthermore, at least two first sliding rods are provided on the first bracket, a first sliding hole is provided on the first electromagnetism device, and the first sliding rod extends in a direction parallel to the direction of extension of the blade and is passed through the first sliding hole.

[0010] Furthermore, a second sliding rod is provided on both opposite sides of the first electromagnetism device, a second sliding hole is provided on the second electromagnetism device, the extension direction of the second sliding rod is perpendicular to the extension direction of the blade and is passed through the second sliding hole, and a first limit block is provided at one end of the second sliding rod away from the first electromagnetism device.

[0011] Furthermore, a buffer component is provided between the first electromagnetism device and the second electromagnetism device to provide a buffer force when the second electromagnetism device approaches the first electromagnetism device.

[0012] Furthermore, the buffer component includes a spring, and the spring is sleeved on the second sliding rod.

[0013] Furthermore, a mounting hole is provided on the first electromagnetism device, the second slide rod is sleeved in the mounting hole, a second limit block and a fastener are provided at one end of the second slide rod close to the first electromagnetism device, and the first electromagnetism device is clamped between the second limit block and the fastener.

[0014] Furthermore, the second driving structure includes a telescopic motor, a housing of the telescopic motor is fixed on the end cover, and a telescopic shaft of the telescopic motor is connected to the first bracket.

[0015] Furthermore, the third driving structure includes a gear train transmission structure and a power device. The gear train transmission structure includes an annular flexible transmission member, a driving wheel, and a driven wheel. The annular flexible transmission member is connected to the first electromagnetism device. The driving wheel is arranged on one side of the extension direction of the first bracket. The power device is connected to the driving wheel to drive the driving wheel to rotate. The driven wheel is rotatably arranged on the other side of the extension direction of the first bracket. The annular flexible transmission member is wrapped around the driving wheel and the driven wheel.

[0016] Furthermore, the power device includes a rotating motor, which is fixed on the first bracket, and the driving wheel is sleeved on the output shaft of the rotating motor.

[0017] Further, the first scrubbing member and the second scrubbing member are both flexible sponges. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a centrifugal blower in an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the end cover in the embodiment of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the utility model from the first perspective;

[0021] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0022] Figure 5It is a structural schematic diagram of the utility model from a second viewing angle;

[0023] Description of main component symbols:

[0024] End cover 100, air inlet 110, accommodating chamber 120, window 121;

[0025] Impeller 200, blades 210;

[0026] A first bracket 500, a first electromagnetism device 510, a first scrubbing member 511, a first sliding hole 512, a second sliding rod 513, a first limiting block 514, a mounting hole 515, a second limiting block 516, a fastener 517, and a first sliding rod 520;

[0027] The third driving structure 700, the gear transmission structure 710, the annular flexible transmission member 711, the driving wheel 712, the driven wheel 713, and the power device 720;

[0028] The second bracket 800, the second electromagnetism device 810, the second scrubbing member 811, the second sliding hole 812, and the buffer component 900;

[0029] The following specific implementation manner will further illustrate the present utility model in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0032] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0033] In addition, the present application provides examples of various specific processes and materials, but a person skilled in the art may be aware of the application of other processes and / or the use of other materials.

[0034] Reference Figures 1 to 5 , which is a scrubbing mechanism for a centrifugal blower provided by the utility model. The centrifugal blower includes an end cover 100, an impeller 200, and an angle adjustment device (not shown in the drawings).

[0035] The end cover 100 is provided with an air inlet 110 and a receiving chamber 120. The air inlet 110 is used to discharge gas into the impeller 200. The receiving chamber 120 is provided with an openable and closable window 121. The impeller 200 is provided with a plurality of straight blades 210 distributed at intervals. The area of ​​the window 121 is at least larger than the maximum area occupied by one of the blades 210. The angle adjustment device is used to adjust the inclination angle of the blade 210, so as to achieve the purpose of adjusting the air volume. Optionally, a door panel that can be opened and closed can be provided at the window 121. When the centrifugal blower is operating normally, the door panel is closed, and when the blade 210 needs to be scrubbed, the door panel is opened.

[0036] The scrubbing mechanism for a centrifugal blower includes a first driving mechanism (not shown in the drawings), a first bracket 500, a second driving structure (not shown in the drawings), a third driving structure 700, a second bracket 800, and a position detection unit.

[0037] The first driving mechanism is in transmission connection with the impeller 200 to drive the impeller 200 to rotate. Preferably, the first driving mechanism adopts a stepping motor, so that the rotation angle of the impeller 200 can be accurately controlled so that the window 121 is aligned with one of the blades 210. At the same time, the stepping motor can be extended and retracted to connect to the corresponding position of the impeller 200, such as the central axis of the impeller 200, when scrubbing is required, and detach from the position of the impeller 200 after scrubbing is completed. The first bracket 500 is movably arranged in the accommodating chamber 120. The first bracket 500 is slidably provided with a first electromagnetism device 510. A first scrubbing member 511 is fixed on the first electromagnetism device 510. The second driving structure is arranged on the end cover 100. When it is necessary to scrub the blade 210, the second driving structure drives the first bracket 500 to extend out of the accommodating chamber 120 from the window 121, and the first scrubbing member 511 abuts against one of the surfaces of the blade 210. After the scrubbing is completed, the second driving structure drives the first bracket 500 to extend into the accommodating chamber 120 from the window 121. The third driving structure 700 is arranged on the first bracket 500. When scrubbing the blade 210, the third driving structure 700 drives the first electromagnetism device 510 to slide on the first bracket 500. In order to enable the first scrubbing member 511 to completely scrub the blade 210, the sliding direction of the first electromagnetism device 510 is parallel to the extension direction of the blade 210. The second bracket 800 is slidably connected with the first electromagnetism device 510. The second electromagnetism device 810 is fixed on the second bracket 800. The second electromagnetism device 810 is provided with a second scrubbing member 811 corresponding to the position of the first scrubbing member 511. When the magnetic fields generated by the first electromagnetism device 510 and the second electromagnetism device 810 are of opposite polarity after being energized, the first electromagnetism device 510 is fixed in position and the second bracket 800 is slidably connected with the first electromagnetism device 510. In this way, the first electromagnetism device 510 will attract the second electromagnetism device 810, so that the second scrubbing member 811 is close to the first electromagnetism device 510 and finally pressed against the other surface opposite to the blade 210. Moreover, when the first electromagnetism device 510 moves on the first bracket 500, it will drive the second bracket 800 to move together, so that the upper and lower surfaces of the blade 210 can be scrubbed. When the magnetic fields generated by the first electromagnetism device 510 and the second electromagnetism device 810 after being energized are of the same polarity, the first electromagnetism device 510 will repel the second electromagnetism device 810, so that the second scrubbing member 811 is away from the first electromagnetism device 510, so that the first bracket 500 can be easily removed to prevent the blades from damaging the second scrubbing member 811 in a tightened state.

[0038] In addition, in order to make the first scrubbing member 511 and the second scrubbing member 811 correctly press against the surface of the blade 210, it is necessary to adjust the inclination angle of the blade 210 by an angle adjustment device.

[0039] Because the blade 210 may not be aligned with the first scrubbing member 511 and the second scrubbing member 811 before the scrubbing operation, the position of the blade 210 relative to the first scrubbing member 511 is detected by the position detection unit, and then the impeller 200 is rotated by the first driving mechanism so that the blade 210 is aligned with the first scrubbing member 511. Optionally, the position detection unit can use image recognition technology, distance sensor and other technologies.

[0040] In this embodiment, by movably arranging the first bracket 500 in the accommodating chamber 120, when the centrifugal blower is operating normally, the first bracket 500 can be prevented from blocking the rotation path of the blade 210. When the blade 210 needs to be scrubbed, the first bracket 500 can be moved out of the accommodating chamber 120 so that the corresponding components on the first bracket 500 are close to the blade 210, and the entire scrubbing operation does not require the removal of the end cover 100, nor does it require manual cleaning of each blade 210.

[0041] In some optional embodiments, such as Figure 3 , Figure 4 As shown, at least two first slide bars 520 are provided on the first bracket 500, and the first slide bars 520 are arranged in parallel. In order to enable the first scrubbing member 511 to completely scrub the blade 210, the extension direction of the first slide bar 520 is parallel to the extension direction of the blade 210. In order to enable the first electromagnetism device 510 to slide on the first slide bar 520, a first slide hole 512 is provided on the first electromagnetism device 510, and the first slide bar 520 is inserted into the first slide hole 512 during assembly.

[0042] In some optional embodiments, such as Figure 4 As shown, second slide bars 513 are provided on opposite sides of the first electromagnetism device 510, and a second slide hole 812 is provided on the second electromagnetism device 810. One axial end of the second slide bar 513 is fixed on the first electromagnetism device 510, and the other axial end of the second slide bar 513 is passed through the second slide hole 812 and extends out of the second slide hole 812. In order to enable the second scrubbing member 811 to cooperate with the first scrubbing member 511 to clamp the upper and lower surfaces of the blade 210, the extension direction of the second slide bar 513 is perpendicular to the extension direction of the blade 210. At the same time, in order to prevent the second electromagnetism device 810 from falling off the second slide bar 513, a first limit block 514 is provided on the end of the second slide bar 513 away from the first electromagnetism device 510, and the first limit block 514 abuts against the surface of the second electromagnetism device 810 away from the first electromagnetism device 510.

[0043] In some optional embodiments, such as Figure 4 , Figure 5As shown, a buffer component 900 is provided between the first electromagnetic device 510 and the second electromagnetic device 810. When the first electromagnetic device 510 attracts the second electromagnetic device 810, the buffer component 900 can provide a buffering force, so that the speed of the second electromagnetic device 810 approaching the first electromagnetic device 510 is gradually reduced, thereby preventing a higher speed from hitting the blade 210 and causing damage to the blade 210, and also preventing the second scrubbing member 811 from being hit by the blade 210 and causing damage.

[0044] In some optional embodiments, the buffer component 900 includes a spring, and the spring is sleeved on the second sliding rod 513 .

[0045] In order to facilitate the installation of the second sliding bar 513, in some optional embodiments, such as Figure 4 As shown, the first electromagnetism device 510 is provided with a mounting hole 515, and one end of the second slide bar 513 close to the first electromagnetism device 510 is penetrated in the mounting hole 515 and extends out, and in addition, the end is also provided with a second limit block 516 and a fastener 517, the second limit block 516 is fixed on the second slide bar 513, and the side of the first electromagnetism device 510 facing the second electromagnetism device 810 is supported on the second limit block 516, and the fastener 517 is fixed to the part of the second slide bar 513 extending out of the mounting hole 515 during assembly, so that the first electromagnetism device 510 is clamped between the second limit block 516 and the fastener 517. Optionally, the fastener 517 can be a nut with a threaded hole, a handle with a threaded hole, or other parts.

[0046] In some optional embodiments, the second driving structure includes a telescopic motor, the shell of the telescopic motor is fixed on the end cover 100, and the telescopic shaft of the telescopic motor is connected to the first bracket 500. When the blade 210 needs to be scrubbed, the telescopic motor rotates to stretch its telescopic shaft outward. Driven by the telescopic shaft, the first bracket 500 extends from the window 121 to the outside of the accommodating chamber 120, and the first scrubbing member 511 abuts against one of the surfaces of the blade 210. After scrubbing is completed, the telescopic motor rotates to retract its telescopic shaft inward. Driven by the telescopic shaft, the first bracket 500 extends from the window 121 into the accommodating chamber 120, and the window 121 is closed at this time.

[0047] In some optional embodiments, such as Figure 3 , Figure 4As shown, the third driving structure 700 includes a gear train transmission structure 710 and a power device 720. The gear train transmission structure 710 includes an annular flexible transmission member 711, a driving wheel 712, and a driven wheel 713. The annular flexible transmission member 711 is connected to the first electromagnetism device 510. The driving wheel 712 is arranged on one side of the extension direction of the first bracket 500, and the driven wheel 713 is rotatably arranged on the other side of the extension direction of the first bracket 500. The power device 720 is connected to the driving wheel 712 to drive the driving wheel 712 to rotate, and then the transmission force is transmitted to the driven wheel 713 by the annular flexible transmission member 711, and the driven wheel 713 rotates accordingly. In this way, the annular flexible transmission member rotates on the driving wheel 712 and the driven wheel 713, and drives the first electromagnetism device 510 to move. Optionally, the annular flexible transmission member 711 can be a conveyor belt or a chain, and the driving wheel 712 and the driven wheel 713 can be a pulley and a sprocket, and the power device 720 can be a device that outputs power, such as a rotary motor and a rotary cylinder. Preferably, the power device 720 includes a rotary motor, which is fixed on the first bracket 500, and the driving wheel 712 is sleeved on the output shaft of the rotary motor.

[0048] In some optional embodiments, the first scrubbing member 511 and the second scrubbing member 811 are both flexible sponges. The wet flexible sponges can absorb dust on the blades 210 and will not damage the blades 210 when squeezed.

[0049] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] 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" 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 referred device or element 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.

[0051] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0052] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0054] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A scrubbing mechanism for a centrifugal blower, characterized in that: The centrifugal blower comprises an end cover, an impeller, and an angle adjustment device. The end cover is provided with an air inlet and a receiving chamber. The receiving chamber is provided with an openable and closable window. The impeller is provided with a plurality of straight blades distributed at intervals. The window can cover at least one of the blades. The angle adjustment device is used to adjust the inclination angle of the blade. The scrubbing mechanism for the centrifugal blower comprises: A first driving mechanism is drivingly connected to the impeller to drive the impeller to rotate; A first bracket is movably disposed in the accommodating chamber, the first bracket is slidably provided with a first electromagnetism device, and the first electromagnetism device is provided with a first scrubbing member; A second driving structure is provided on the end cover to drive the first bracket to extend from the window to the outside of the accommodation chamber, and to extend from the window to the inside of the accommodation chamber; a third driving structure, provided on the first bracket, to drive the first electromagnetism device to slide on the first bracket and the sliding direction is parallel to the extension direction of the blade; a second bracket, slidably connected to the first electromagnetism device, the second bracket is provided with a second electromagnetism device, the second electromagnetism device is provided with a second scrubbing member corresponding to the position of the first scrubbing member; A position detection unit, used for detecting the position of the blade relative to the window; When the first electromagnetism device and the second electromagnetism device are of the same polarity, the second electromagnetism device is away from the first electromagnetism device; when the first electromagnetism device and the second electromagnetism device are of opposite polarity, the second electromagnetism device is close to the first electromagnetism device.

2. The scrubbing mechanism for a centrifugal blower according to claim 1, characterized in that: At least two first sliding rods are arranged on the first bracket, a first sliding hole is arranged on the first electromagnetism device, and the extending direction of the first sliding rod is parallel to the extending direction of the blade and is passed through the first sliding hole.

3. The scrubbing mechanism for a centrifugal blower according to claim 1, characterized in that: A second sliding rod is provided on both opposite sides of the first electromagnetism device, a second sliding hole is provided on the second electromagnetism device, an extension direction of the second sliding rod is perpendicular to an extension direction of the blade and the second sliding rod is passed through the second sliding hole, and a first limit block is provided at one end of the second sliding rod away from the first electromagnetism device.

4. The scrubbing mechanism for a centrifugal blower according to claim 3, characterized in that: A buffer component is provided between the first electromagnetism device and the second electromagnetism device to provide a buffer force when the second electromagnetism device is close to the first electromagnetism device.

5. The scrubbing mechanism for a centrifugal blower according to claim 4, characterized in that: The buffer component includes a spring, and the spring is sleeved on the second sliding rod.

6. The scrubbing mechanism for a centrifugal blower according to any one of claims 3 to 5, characterized in that: The first electromagnetism device is provided with a mounting hole, the second slide bar is sleeved in the mounting hole, the second slide bar is provided with a second limit block and a fastener at one end close to the first electromagnetism device, and the first electromagnetism device is clamped between the second limit block and the fastener.

7. The scrubbing mechanism for a centrifugal blower according to any one of claims 1 to 3, characterized in that: The second driving structure includes a telescopic motor, a housing of the telescopic motor is fixed on the end cover, and a telescopic shaft of the telescopic motor is connected to the first bracket.

8. The scrubbing mechanism for a centrifugal blower according to any one of claims 1 to 3, characterized in that: The third driving structure includes a gear train transmission structure and a power device, the gear train transmission structure includes an annular flexible transmission member, a driving wheel, and a driven wheel, the annular flexible transmission member is connected to the first electromagnetism device, the driving wheel is arranged on one side of the extension direction of the first bracket, the power device is connected to the driving wheel to drive the driving wheel to rotate, the driven wheel is rotatably arranged on the other side of the extension direction of the first bracket, and the annular flexible transmission member is wound around the driving wheel and the driven wheel.

9. The scrubbing mechanism for a centrifugal blower according to claim 8, characterized in that: The power device comprises a rotating motor, which is fixed on the first bracket, and the driving wheel is sleeved on the output shaft of the rotating motor.

10. The scrubbing mechanism for a centrifugal blower according to claim 1, characterized in that: The first scrubbing member and the second scrubbing member are both flexible sponges.

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