Low-noise and high-efficiency outer rotor axial flow fan

Abstract

This utility model discloses a low-noise, high-efficiency external rotor axial flow fan, including a base plate. A vibration damping pad is fixedly connected to the middle of the top of the base plate, and a vibration damping bracket is fixedly connected to the middle of the top of the vibration damping pad. A fan housing is fixedly connected to the top of the vibration damping bracket. A first vibration damping and noise reduction sleeve and a second vibration damping and noise reduction sleeve are provided on the outer surface of the fan housing. A connecting plate is provided on the outer side of both the first and second vibration damping and noise reduction sleeves, and a rubber pad is provided on the inner side of the connecting plate. A limit rod is threadedly connected to the inner cavity of the connecting plate. This utility model can effectively reduce the vibration transmitted to the base during fan operation through the vibration damping pad and vibration damping bracket on the base plate, avoiding noise caused by vibration and its impact on surrounding equipment. The first and second vibration damping and noise reduction sleeves, wrapped around the fan housing, in conjunction with the connecting plate, rubber pad, limit rod, and positioning nut, further enhance the vibration damping and noise reduction capabilities.

Description

Technical Field

[0001] This utility model relates to the field of external rotor axial flow fan technology, specifically a low-noise and high-efficiency external rotor axial flow fan. Background Technology

[0002] External rotor axial flow fans are widely used in air conditioning equipment, ventilation systems, and industrial equipment heat dissipation due to their advantages such as compact structure and convenient installation.

[0003] However, existing external rotor axial flow fans will cause a certain degree of vibration due to high-speed rotation during actual use. At the same time, the high speed will also cause a certain amount of noise. This will cause the external rotor axial flow fan to generate a lot of noise during operation, which will have a certain impact on the operating environment of the operator. To this end, we propose a low-noise and high-efficiency external rotor axial flow fan. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise, high-efficiency external rotor axial flow fan to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-noise, high-efficiency external rotor axial flow fan, comprising a base plate, a shock-absorbing pad fixedly connected to the middle of the top of the base plate, a shock-absorbing bracket fixedly connected to the middle of the top of the shock-absorbing pad, a fan housing fixedly connected to the top of the shock-absorbing bracket, a first shock-absorbing and noise-reducing sleeve and a second shock-absorbing and noise-reducing sleeve provided on the outer surface of the fan housing, a connecting plate provided on the outer side of both the first and second shock-absorbing and noise-reducing sleeves, a rubber pad provided on the inner side of the connecting plate, a limit rod threadedly connected to the inner cavity of the connecting plate, a positioning nut threadedly connected to the outer side of the limit rod, a sealing gasket provided at the connection between the limit rod and the connecting plate, an isolation strip provided at the connection between the first and second shock-absorbing and noise-reducing sleeves and the fan housing, a fan body provided in the inner cavity of the fan housing, and a positioning plate provided on the outer side of the fan housing.

[0006] Preferably, the outer surface of the fan housing is provided with a sound-absorbing cotton layer, and the outer surface of the sound-absorbing cotton layer is provided with a sound-insulating cotton layer.

[0007] Preferably, the inner surface of the fan housing is provided with an asphalt damping layer, and the inner surface of the asphalt damping layer is provided with a damping rubber layer.

[0008] Preferably, a dustproof net is fixedly connected to one side of the fan housing by bolts, and the dustproof net is made of stainless steel metal filter mesh.

[0009] Preferably, a heat dissipation hole is provided on one side of the fan casing, and an isolation mesh is provided inside the heat dissipation hole.

[0010] Preferably, mounting holes are provided on all four sides of the base plate, and the mounting holes are circular.

[0011] Preferably, the thickness of the asphalt damping layer is 0.12cm-0.15cm, and the thickness of the damping rubber layer is 0.11cm-0.14cm.

[0012] Preferably, the thickness of the sound-absorbing cotton layer is 0.13cm-0.16cm, and the thickness of the sound-insulating cotton layer is 0.11cm-0.14cm.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model effectively reduces the vibration transmitted to the base during fan operation through the shock-absorbing pads and shock-absorbing brackets on the base plate, avoiding noise caused by vibration and its impact on surrounding equipment. The first and second shock-absorbing and noise-reducing sleeves wrap around the fan housing, and in conjunction with the connecting plate, rubber pads, limit rods, and positioning nuts, further enhance the shock absorption and noise reduction capabilities. The sealing gasket prevents external noise from entering and internal noise from escaping, and the insulating strip also helps reduce vibration transmission between the fan housing and the shock-absorbing and noise-reducing sleeves.

[0015] 2. This utility model uses a sound-absorbing cotton layer on the outer surface of the fan casing to absorb some of the noise generated by the fan, while a sound-insulating cotton layer further prevents the noise from spreading outwards. The asphalt damping layer and damping rubber layer on the inner surface can suppress the vibration of the fan casing and reduce the noise caused by the vibration of the casing. The dustproof net on one side of the fan casing can effectively block dust, debris and other objects from entering the fan, protect the normal operation of the fan body and extend the service life of the fan.

[0016] The design of the heat dissipation holes and the isolation mesh can not only ensure air circulation inside the fan and achieve heat dissipation, but also prevent foreign objects from entering the fan through the heat dissipation holes. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the dustproof net structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the isolation strip structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the sound-absorbing cotton layer structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the damping rubber layer structure of this utility model.

[0022] In the diagram: 1. Base plate; 2. Vibration damping pad; 3. Fan casing; 4. First vibration damping and noise reduction sleeve; 5. Vibration damping bracket; 6. Connecting plate; 7. Positioning plate; 8. Rubber pad; 9. Sealing gasket; 10. Positioning nut; 11. Second vibration damping and noise reduction sleeve; 12. Dustproof net; 13. Limiting rod; 14. Fan body; 15. Isolation strip; 16. Sound-absorbing cotton layer; 17. Sound-insulating cotton layer; 18. Asphalt damping layer; 19. Damping rubber layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] This application includes the following components: 1. base plate; 2. shock-absorbing pad; 3. fan housing; 4. first shock-absorbing and noise-reducing sleeve; 5. shock-absorbing bracket; 6. connecting plate; 7. positioning plate; 8. rubber pad; 9. sealing gasket; 10. positioning nut; 11. second shock-absorbing and noise-reducing sleeve; 12. dustproof net; 13. limit rod; 14. fan body; 15. isolation strip; 16. sound-absorbing cotton layer; 17. sound-insulating cotton layer; 18. asphalt damping layer; 19. damping rubber layer. All components are general standard parts or parts known to those skilled in the art, and their structures and principles can be obtained by those skilled in the art through technical manuals or conventional experimental methods. Example

[0025] Please see Figures 1-5 The following technical solution is provided, specifically disclosing: a low-noise and high-efficiency external rotor axial flow fan, including a base plate 1, a shock-absorbing pad 2 fixedly connected to the middle of the top of the base plate 1, a shock-absorbing bracket 5 fixedly connected to the middle of the top of the shock-absorbing pad 2, a fan housing 3 fixedly connected to the top of the shock-absorbing bracket 5, a first shock-absorbing and noise-reducing sleeve 4 and a second shock-absorbing and noise-reducing sleeve 11 provided on the outer surface of the fan housing 3, a connecting plate 6 provided on the outer side of both the first shock-absorbing and noise-reducing sleeve 4 and the second shock-absorbing and noise-reducing sleeve 11, a rubber pad 8 provided on the inner side of the connecting plate 6, a limit rod 13 threadedly connected to the inner cavity of the connecting plate 6, a positioning nut 10 threadedly connected to the outer side of the limit rod 13, a sealing gasket 9 provided at the connection between the limit rod 13 and the connecting plate 6, an isolation strip 15 provided at the connection between the first shock-absorbing and noise-reducing sleeve 4 and the second shock-absorbing and noise-reducing sleeve 11 and the fan housing 3, a fan body 14 provided in the inner cavity of the fan housing 3, and a positioning plate 7 provided on the outer side of the fan housing 3;

[0026] In practical use, the vibration damping pads 2 and vibration damping brackets 5 on the base plate 1 can effectively reduce the vibration transmitted to the base during fan operation, avoiding noise caused by vibration and its impact on surrounding equipment. The first vibration damping and noise reduction sleeve 4 and the second vibration damping and noise reduction sleeve 11 wrap around the fan housing 3, and together with the connecting plate 6, rubber pads 8, limit rods 13 and positioning nuts 10, further enhance the vibration damping and noise reduction capabilities. The sealing gasket 9 prevents external noise from entering and internal noise from escaping, and the insulating strip 15 also helps to reduce the vibration transmission between the fan housing and the vibration damping and noise reduction sleeves. Example

[0027] Please see Figure 1 and Figure 2 The following technical solution is provided, specifically disclosed: a sound-absorbing cotton layer 16 is provided on the outer surface of the fan housing 3, a sound-insulating cotton layer 17 is provided on the outer surface of the sound-absorbing cotton layer 16, an asphalt damping layer 18 is provided on the inner surface of the fan housing 3, a damping rubber layer 19 is provided on the inner surface of the asphalt damping layer 18, a dustproof net 12 is fixedly connected to one side of the fan housing 3 by bolts, the dustproof net 12 is made of stainless steel metal filter mesh, a heat dissipation hole is opened on one side of the fan housing 3, an isolation net is provided in the inner cavity of the heat dissipation hole, mounting holes are opened on all four sides of the base plate 1, the mounting holes are circular, the thickness of the asphalt damping layer 18 is 0.12cm-0.15cm, the thickness of the damping rubber layer 19 is 0.11cm-0.14cm, the thickness of the sound-absorbing cotton layer 16 is 0.13cm-0.16cm, and the thickness of the sound-insulating cotton layer 17 is 0.11cm-0.14cm;

[0028] In actual use, the sound-absorbing cotton layer 16 on the outer surface of the fan housing 3 can absorb some of the noise generated by the fan, while the sound-insulating cotton layer 17 further prevents the noise from spreading outward. The asphalt damping layer 18 and the damping rubber layer 19 on the inner surface can suppress the vibration of the fan housing and reduce the noise generated by the vibration of the housing. The dustproof net 12 on one side of the fan housing 3 can effectively block dust, debris and other objects from entering the fan, protect the normal operation of the fan body 14, and extend the service life of the fan.

[0029] The design of the heat dissipation holes and the isolation mesh can not only ensure air circulation inside the fan and achieve heat dissipation, but also prevent foreign objects from entering the fan through the heat dissipation holes.

[0030] In use: Fix the fan in a suitable position using the mounting holes on the base plate 1, according to actual installation requirements. Install the first vibration damping and noise reduction sleeve 4 and the second vibration damping and noise reduction sleeve 11 onto the fan housing 3 via the connecting plate 6, the limiting rod 13, and the positioning nut 10. Ensure the sealing gasket 9 and the isolation strip 15 are installed. Start the fan body 14; the fan will begin operating. Air enters the fan housing 3 through the dust filter 12, is accelerated by the fan body 14, and is then discharged. Vibrations generated during operation are initially buffered by the vibration damping pads 2 and the vibration damping brackets 5, reducing the vibration transmitted to the base 1. The first vibration damping and noise reduction sleeve 4 and the second vibration damping and noise reduction sleeve 11 are further absorbed and isolated from the fan housing 3 by the rubber pad 8 and the isolation strip 15.

[0031] The noise generated by the fan is partially absorbed by the sound-absorbing cotton layer 16, and the sound-insulating cotton layer 17 prevents the noise from propagating outwards. The asphalt damping layer 18 and the damping rubber layer 19 suppress the vibration of the fan casing, reducing the noise generated by the casing vibration. The dustproof net 12 prevents dust and other debris from entering the fan, protecting the fan body 14. Air circulates inside the fan through the heat dissipation holes, carrying away heat and achieving the heat dissipation function. The isolation net prevents foreign objects from entering the fan through the heat dissipation holes. The cleanliness of the dustproof net 12 should be checked regularly. If it is blocked, it should be cleaned or replaced in time. The first shock-absorbing and noise-reducing sleeve 4 and the second shock-absorbing and noise-reducing sleeve 11 can be disassembled as needed for maintenance and repair of the fan interior.

[0032] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0033] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A low-noise, high-efficiency external rotor axial flow fan, comprising a base plate (1), characterized in that: A shock-absorbing pad (2) is fixedly connected to the middle of the top of the base plate (1). A shock-absorbing bracket (5) is fixedly connected to the middle of the top of the shock-absorbing pad (2). A fan housing (3) is fixedly connected to the top of the shock-absorbing bracket (5). A first shock-absorbing and noise-reducing sleeve (4) and a second shock-absorbing and noise-reducing sleeve (11) are provided on the outer surface of the fan housing (3). A connecting plate (6) is provided on the outer side of both the first shock-absorbing and noise-reducing sleeve (4) and the second shock-absorbing and noise-reducing sleeve (11). A rubber pad (8) is provided on the inner side of the connecting plate (6). The inner cavity of the connecting plate (6) is threaded with a limiting rod (13), and the outer side of the limiting rod (13) is threaded with a positioning nut (10). A sealing gasket (9) is provided at the connection between the limiting rod (13) and the connecting plate (6). An isolation strip (15) is provided at the connection between the first shock-absorbing and noise-reducing sleeve (4) and the second shock-absorbing and noise-reducing sleeve (11) and the fan housing (3). The inner cavity of the fan housing (3) is provided with a fan body (14), and the outer side of the fan housing (3) is provided with a positioning plate (7).

2. The low-noise, high-efficiency external rotor axial flow fan according to claim 1, characterized in that: The outer surface of the fan housing (3) is provided with a sound-absorbing cotton layer (16), and the outer surface of the sound-absorbing cotton layer (16) is provided with a sound-insulating cotton layer (17).

3. The low-noise, high-efficiency external rotor axial flow fan according to claim 1, characterized in that: The inner surface of the fan housing (3) is provided with an asphalt damping layer (18), and the inner surface of the asphalt damping layer (18) is provided with a damping rubber layer (19).

4. The low-noise, high-efficiency external rotor axial flow fan according to claim 1, characterized in that: A dustproof net (12) is fixedly connected to one side of the fan housing (3) by bolts. The dustproof net (12) is made of stainless steel metal filter.

5. The low-noise, high-efficiency external rotor axial flow fan according to claim 1, characterized in that: The fan housing (3) has a heat dissipation hole on one side, and the inner cavity of the heat dissipation hole is provided with an isolation mesh.

6. The low-noise, high-efficiency external rotor axial flow fan according to claim 1, characterized in that: The base plate (1) has mounting holes on all four sides, and the mounting holes are circular.

7. A low-noise, high-efficiency external rotor axial flow fan according to claim 3, characterized in that: The thickness of the asphalt damping layer (18) is 0.12cm-0.15cm, and the thickness of the damping rubber layer (19) is 0.11cm-0.14cm.

8. A low-noise, high-efficiency external rotor axial flow fan according to claim 2, characterized in that: The thickness of the sound-absorbing cotton layer (16) is 0.13cm-0.16cm, and the thickness of the sound-insulating cotton layer (17) is 0.11cm-0.14cm.

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