Dustproof centrifugal fan

Through the design of the elastic frame and filter mesh, the problem of the inadequate filter mesh aperture of the existing centrifugal fan is solved, flexible filtration effect adjustment is achieved, and the adaptability and operation efficiency of the equipment are improved.

CN223203278UActive Publication Date: 2025-08-08JIAOHE TIANXIANG CARBON IND CO LTD
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Patent Information

Application Number
CN202422556152.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-23
Publication Date
2025-08-08
Estimated Expiration
2034-10-23

AI Technical Summary

Technical Problem

The straight plate filter of existing centrifugal fans is difficult to adjust the aperture according to user needs, resulting in inconvenient replacement, increased storage and maintenance costs, and cannot meet the needs of high filtration efficiency or large ventilation in special occasions.

Method used

The elastic frame and elastic filter mesh design are adopted. By adjusting the position of the elastic tightening bar and the selection of insert blocks, the bending curvature and aperture of the filter mesh are changed to achieve flexible filtering effect adjustment.

Benefits of technology

Improves air cleanliness, reduces equipment wear and failure risks, reduces maintenance costs and time, and ensures the optimal operating status of the fan in different environments.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a dustproof centrifugal fan, which belongs to the field of centrifugal fans and is characterized in that an elastic propping strip is arranged at the other end of an elastic frame, and the elastic frame is propped against an opening at the upper end of a fan shell through the elastic propping strip and an insert block; a cavity is formed in the end face of the elastic frame, an elastic filter screen is connected into the cavity, the position of the elastic filter screen at the opening of the fan shell is adjusted through the elastic abutting strip, then the bending curvature of the elastic filter screen and the elastic frame is adjusted, and the filtering area and the filtering hole diameter are changed through the deformed elastic filter screen. The elastic filter screen can effectively filter dust and particles in the air, the air quality is improved, and the filtering effect can be adjusted according to the working environment. The design reduces the internal abrasion of the fan, prolongs the service life, and reduces the maintenance cost and time. The filter screen keeps the optimal operation state of the fan, the fault risk is reduced, and the safety is improved. A user can adjust the filter screen to adapt to different working conditions, and the flexibility and adaptability of equipment are ensured.
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Description

Technical Field

[0001] The utility model relates to the field of centrifugal fans, in particular to a dust-proof centrifugal fan. Background Art

[0002] Centrifugal fans are a widely used type of fluid machinery, primarily used for conveying gas. Their operating principle is based on the centrifugal force generated by the high-speed rotation of the impeller, which flings the gas from the center to the periphery, thereby achieving gas transportation and discharge.

[0003] During operation, the motor drives the impeller to rotate at high speed, drawing air in from the center of the impeller. Centrifugal force then propels the air toward the periphery and discharges it through the outlet. To protect the fan blades and improve air quality, a straight-plate filter is typically installed at the air inlet of a centrifugal fan to block dust and other particulate matter.

[0004] However, straight-plate filters are often installed tightly to improve filtration efficiency, making them difficult to disassemble for cleaning or replacement, increasing maintenance costs and labor intensity. Furthermore, the mesh diameter of straight-plate filters is fixed and cannot be adjusted to meet user needs. Therefore, to change the filtration accuracy or adapt to different working environments, users must replace the filter with a filter of a different pore size, which is neither convenient nor economical. In some special applications requiring higher filtration efficiency or greater ventilation volume, existing filters may not meet the requirements.

[0005] Since the mesh diameter cannot be adjusted, users may need to prepare multiple filters with different pore sizes to cope with different situations. This not only increases storage costs but also increases maintenance costs due to frequent replacement. Straight-plate filters lack the ability to flexibly adjust to actual usage conditions, which to some extent limits the fan's application range and efficiency. Utility Model Content

[0006] The main purpose of the utility model is to provide a dust-proof centrifugal fan, which can effectively solve the problems raised in the background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A dustproof centrifugal fan comprises a fan housing, a fan disassembly cover, a mounting block and a docking block, wherein the fan disassembly cover is located in an opening of a side wall of the fan housing, and the mounting block is located in a side wall of the fan housing. The fan disassembly cover is provided with a docking block adapted to the mounting block, and circular holes are opened in the mounting block and the docking block for insertion of bolts for securing.

[0009] A placement platform is provided at the upper opening of the fan housing, and an embedding hole is opened on the side wall of the placement platform. An elastic frame is placed on the placement platform, and an insert is provided at the inner end of the elastic frame to fit the embedding hole. An elastic pressing strip is provided at the other end of the elastic frame, and the elastic frame is pressed against the upper opening of the fan housing through the elastic pressing strip and the insert.

[0010] The end face of the elastic frame is provided with a cavity, and the interior of the cavity is connected to an elastic filter screen, which is adjusted in position at the opening of the fan housing by an elastic tightening strip, thereby adjusting the bending curvature of the elastic filter screen and the elastic frame. The deformed elastic filter screen changes the filter area and filter aperture, making it more convenient for users to use.

[0011] As a further preferred embodiment of the present invention, the outer end surface of the elastic tightening strip is provided with a first plug-in block and a second plug-in block, and the first plug-in block or the second plug-in block is inserted into different plug-in holes on the inner wall of the fan disassembly cover, and the bending curvature of the elastic frame and the elastic filter screen is adjusted through the different plug-in holes;

[0012] As a further preferred embodiment of the present invention, the elastic frame and the elastic pressing strip are integrally designed, the elastic filter screen is welded to the elastic frame, the elastic frame, the elastic filter screen and the elastic pressing strip are made of elastic metal plates, and the cross-sections of the elastic frame, the elastic filter screen and the elastic pressing strip are designed in an "L" shape;

[0013] As a further preferred embodiment of the present invention, the cross section of the elastic pressing strip is designed to be "C"-shaped, and an anti-slip rubber strip is provided on the outer end surface of the elastic pressing strip, which presses against the fan disassembly cover through the anti-slip rubber strip to prevent the elastic pressing strip from sliding;

[0014] As a further preferred embodiment of the present invention, the insert is designed as an integral unit with the elastic frame, and anti-slip rubber strips are provided at the connection between the insert, the elastic frame and the fan housing;

[0015] As a further preferred embodiment of the present invention, a circular hole is provided on the end face of the elastic tightening strip, and the circular hole is opposite to the screw hole on the fan disassembly cover. Different screw holes adjust the bending curvature of the elastic tightening strip, and the elastic tightening strip is fixed to the fan disassembly cover by bolts.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this utility model, the elastic filter effectively filters dust and particulate matter from the air, preventing these pollutants from entering the fan, thereby improving the cleanliness of the exhaust air. By adjusting the curvature and pore size of the filter, users can select the appropriate filtration effect based on the actual working environment and further optimize the air quality.

[0018] The presence of the filter reduces the wear and tear of dust and other particulate matter on the fan's internal mechanical components, reducing the risk of equipment failure due to particulate accumulation. The flexible design allows the filter to adapt to different working environments, reducing damage caused by hard particle impact, thereby extending the service life of the equipment.

[0019] Because the filter can effectively intercept particulate matter, the frequency of cleaning the fan interior is reduced, reducing maintenance costs. The quick-release design makes filter replacement simple and quick, reducing the time and labor costs required for maintenance.

[0020] A clean filter keeps the fan operating at its optimal state, preventing particle blockage that could reduce the fan's efficiency. The flexible filter can be adjusted to suit varying operating conditions, ensuring the fan always operates at its optimal state.

[0021] The filter prevents foreign matter from entering the fan, reducing mechanical failures and potential safety risks caused by foreign matter. The anti-slip rubber strip design increases the stability between components, reduces vibration and noise during operation, and improves equipment safety.

[0022] Users can adjust the filter's curvature and aperture size according to actual needs, allowing the fan to adapt to different working environments and particle sizes. The quick-change filter design allows the fan to quickly adapt to changing working conditions, improving the flexibility and adaptability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is an exploded view of the overall structure of the utility model;

[0025] Figure 3 This is a diagram showing the elastic frame, elastic filter screen and elastic tightening strip of the utility model;

[0026] Figure 4 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0027] In the figure: 1. Fan housing; 2. Fan disassembly and assembly cover; 3. Mounting block; 4. Docking block; 5. Elastic frame; 6. Cavity; 7. Elastic filter screen; 8. Placement table; 9. Embedding hole; 10. Embedding block; 11. Elastic tightening strip; 12. First plug-in block; 13. Second plug-in block. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0029] like Figure 1 - Figure 4 As shown, a dust-proof centrifugal fan comprises a fan casing 1, a fan disassembly and assembly cover 2, a mounting block 3, a docking block 4, a placement platform 8, an embedding hole 9, an elastic frame 5, an embedding block 10, an elastic tightening strip 11, a cavity 6, an elastic filter screen 7, a first insert block 12, a second insert block 13 and an anti-slip rubber strip.

[0030] The fan housing 1 has a sidewall opening, into which the fan assembly and disassembly cover 2 is mounted. A mounting block 3 is fixed to the sidewall of the fan housing 1, while a docking block 4 is mounted on the fan assembly and disassembly cover 2 to mate with the mounting block 3. Both the mounting block 3 and the docking block 4 have circular holes through which bolts are inserted for securement.

[0031] A placement platform 8 is provided at the upper opening of the fan housing 1, with an insert hole 9 defined in its sidewall. The elastic frame 5 is placed on this platform, with an insert 10 positioned at its inner end to fit into the insert hole 9. An elastic retaining strip 11 is provided at the other end of the elastic frame 5, which, together with the insert 10, holds the elastic frame 5 against the upper opening of the fan housing 1.

[0032] The end surface of the elastic frame 5 defines a cavity 6, within which an elastic filter screen 7 is connected. The elastic retaining strip 11 adjusts the position of the elastic filter screen 7 at the opening of the fan housing 1, thereby adjusting the curvature of the elastic filter screen 7 and the elastic frame 5. Deformation of the elastic filter screen 7 can alter the filtration area and pore size, thus providing greater convenience for the user.

[0033] The outer end surface of the elastic tightening strip 11 is provided with a first plug block 12 and a second plug block 13. By inserting the first plug block 12 or the second plug block 13 into different plug holes on the inner wall of the fan disassembly cover 2, the bending curvature of the elastic frame 5 and the elastic filter screen 7 can be adjusted.

[0034] The elastic frame 5 and the elastic pressing strip 11 are designed as one piece, and the elastic filter screen 7 is welded to the elastic frame 5. All three are made of elastic metal plates, and their cross sections are designed in an "L" shape.

[0035] The cross section of the elastic pressing strip 11 is designed to be "C"-shaped, and an anti-skid rubber strip is provided on its outer end surface to prevent it from sliding on the fan disassembly cover 2.

[0036] The insert 10 and the elastic frame 5 are designed as one piece, and anti-slip rubber strips are provided at the connection between the insert 10, the elastic frame 5 and the fan housing 1.

[0037] The end surface of the elastic tight strip 11 is provided with a circular hole, which is opposite to the screw hole provided on the fan disassembly cover 2. The bending curvature of the elastic tight strip 11 is adjusted by selecting different screw holes, and the elastic tight strip 11 is fixed to the fan disassembly cover 2 by bolts.

[0038] To use a centrifugal fan: Secure the fan housing 1 in place and secure it with bolts using the circular holes on the mounting block 3 and docking block 4. Ensure the fan is properly grounded and connect the power cord to the fan's power port. Before starting, check that the fan housing 1, fan assembly and disassembly cover 2, mounting block 3, and other components are securely installed, and confirm that no foreign matter has entered the fan. Turn on the power switch, start the fan, and observe its smooth operation and any unusual noises. While the fan is operating normally, perform exhaust or supply air.

[0039] To replace the quick-release filter: Ensure the fan is off and disconnect the power supply. Loosen the bolts securing the fan access cover 2 and open it. Gently remove the elastic filter 7, taking care not to damage it. Place the new elastic filter 7 into the elastic frame 5, ensuring that the filter is properly aligned with the frame. Adjust the position of the elastic retaining strips 11 as needed to change the curvature of the filter. Re-secure the access cover to the side opening of the fan housing 1.

[0040] To adjust the filter: Locate the first insert 12 or the second insert 13 on the elastic retaining strip 11. Select the appropriate slot on the inner wall of the fan assembly / disassembly cover 2 based on the desired curvature. Insert the insert into the selected slot. Adjust the curvature of the elastic frame 5 and elastic filter 7 by adjusting the position of the insert. Select a filter with the appropriate mesh size based on the particle size to be filtered. Replace the existing filter with the new mesh size following the steps described above for replacing a quick-release filter.

[0041] During the entire process, ensure that all operations are carried out under safe conditions to avoid electric shock and mechanical injuries. At the same time, ensure that all parts are installed correctly after replacement to ensure the normal operation and efficiency of the fan.

[0042] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. However, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the elements.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A dustproof centrifugal fan, comprising a fan housing (1), a fan disassembly cover (2), a mounting block (3) and a docking block (4), wherein the fan disassembly cover (2) is located at an opening of a side wall of the fan housing (1), and the mounting block (3) is located at a side wall of the fan housing (1), and the fan disassembly cover (2) is provided with a docking block (4) adapted to the mounting block (3), and circular holes are opened on the mounting block (3) and the docking block (4) for insertion of bolts for fixing, characterized in that: A placement platform (8) is provided at the upper opening of the fan housing (1), and an embedding hole (9) is provided on the side wall of the placement platform (8); an elastic frame (5) is placed on the placement platform (8), and an insert (10) adapted to the embedding hole (9) is provided at the inner end of the elastic frame (5); an elastic pressing strip (11) is provided at the other end of the elastic frame (5), and the elastic frame (5) is pressed against the upper opening of the fan housing (1) through the elastic pressing strip (11) and the insert (10); The end surface of the elastic frame (5) is provided with a cavity (6), and the interior of the cavity (6) is connected to an elastic filter screen (7). The position of the elastic filter screen (7) at the opening of the fan housing (1) is adjusted by an elastic tightening strip (11), thereby adjusting the bending curvature of the elastic filter screen (7) and the elastic frame (5). The deformed elastic filter screen (7) changes the filtering area and the filtering aperture, making it convenient for users to use.

2. A dust-proof centrifugal fan according to claim 1, characterized in that: The outer end surface of the elastic pressing strip (11) is provided with a first plug block (12) and a second plug block (13), and the first plug block (12) or the second plug block (13) is inserted into different plug holes on the inner wall of the fan disassembly cover (2), and the bending curvature of the elastic frame (5) and the elastic filter screen (7) is adjusted through the different plug holes.

3. A dust-proof centrifugal fan according to claim 1 or 2, characterized in that: The elastic frame (5) and the elastic pressing strip (11) are designed as an integral whole, the elastic filter screen (7) is welded to the elastic frame (5), the elastic frame (5), the elastic filter screen (7) and the elastic pressing strip (11) are made of elastic metal plates, and the cross-sections of the elastic frame (5), the elastic filter screen (7) and the elastic pressing strip (11) are designed in an "L" shape.

4. The dust-proof centrifugal fan according to claim 3, characterized in that: The cross section of the elastic pressing strip (11) is designed in a "C" shape, and the outer end surface of the elastic pressing strip (11) is provided with an anti-slip rubber strip, which presses against the fan disassembly cover (2) to prevent the elastic pressing strip (11) from sliding.

5. The dust-proof centrifugal fan according to claim 4, characterized in that: The insert (10) and the elastic frame (5) are designed as an integral whole, and anti-slip rubber strips are provided at the connection between the insert (10), the elastic frame (5) and the fan housing (1).

6. The dust-proof centrifugal fan according to claim 5, characterized in that: A circular hole is provided on the end surface of the elastic tightening strip (11), and the circular hole is directly opposite to the screw hole provided on the fan disassembly cover (2). Different screw holes are used to adjust the bending curvature of the elastic tightening strip (11), and the elastic tightening strip (11) is fixed to the fan disassembly cover (2) by bolts.