Low-noise axial flow fan

Abstract

The utility model discloses a low noise axial flow fan which comprises an axial flow fan body, a front noise reduction shell and a rear noise reduction shell are detachably installed at the two ends of the axial flow fan body, the axial flow fan body comprises a shell, an installation base is installed in the shell, a driving motor is installed on the installation base, the driving motor drives a blade base, and the blade base is connected with the front noise reduction shell and the rear noise reduction shell. A plurality of blades are installed on the blade base at equal intervals, and the outer side of the shell is wrapped with a sound absorption cotton layer. According to the utility model, the outer side of the shell is wrapped with the sound-absorbing cotton layer, and the sound-absorbing cotton layer can absorb noise at the shell to a certain extent, so that a certain noise reduction effect is achieved; the noise at the two ends of the axial flow fan body can be processed through the front noise reduction shell and the rear noise reduction shell, and the possibility that the noise is spread outwards is reduced; the front noise reduction shell and the rear noise reduction shell are each composed of a metal shell, a honeycomb plate and a sound absorption material layer, and the sound absorption and noise reduction effects of the front noise reduction shell and the rear noise reduction shell are improved through the honeycomb plates and the sound absorption material layers.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow fans, in particular to a low-noise axial flow fan. Background Art

[0002] Axial flow fans are widely used and are usually used in situations where the flow rate requirements are high and the pressure is low. Axial flow fans are mainly composed of fan impellers and casings. They are called "axial flow fans" because the gas flows parallel to the axis of the fan. When the axial flow fan is working, the motor needs to drive the fan blades to rotate to complete the blowing.

[0003] The existing publication number CN216342890U discloses a low-noise axial flow fan, which relates to the field of industrial manufacturing technology; the positive fixing mechanism includes a positive protective shell and a ventilation frame, the cross-section of the positive protective shell is arc-shaped, the negative fixing mechanism includes a negative protective shell and two fixing rings, the cross-section of the negative protective shell is arc-shaped, the noise reduction mechanism includes a rotating motor and two fixing frames, the rotating motor is clamped and fixed inside the two fixing frames, and the noise reduction mechanism is fixed inside the positive fixing mechanism and the negative fixing mechanism; the vibration force is eliminated by the elastic force of the reset spring, thereby preventing the rotating motor from resonating with the shell and emitting noise, and by moving the fixing ring to disengage from the positive protective shell and the negative protective shell, and then moving the positive protective shell to drive the clamping rod to disengage from the clamping groove, so that the axial flow fan has less noise when working.

[0004] Although the existing axial flow fan has a noise reduction effect to a certain extent, the noise reduction effect still needs to be further improved. To this end, we propose a low-noise axial flow fan. Utility Model Content

[0005] The purpose of the utility model is to provide a low-noise axial flow fan to solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-noise axial flow fan, comprising an axial flow fan body, a front noise reduction shell and a rear noise reduction shell being detachably installed at both ends of the axial flow fan body, the axial flow fan body comprising a shell, a mounting seat being installed in the shell, a drive motor being installed on the mounting seat, the drive motor driving a blade seat, a plurality of blades being installed on the blade seat at equal intervals, and the outer side of the shell being wrapped with a sound-absorbing cotton layer.

[0007] Preferably, the blade is arc-shaped, and comprises an end structure and a rear structure, wherein the thickness of the front structure is greater than the thickness of the rear structure.

[0008] Preferably, the front noise reduction shell is a trumpet-shaped structure, and the rear noise reduction shell is a circular ring.

[0009] Preferably, the front noise reduction shell and the rear noise reduction shell are both composed of a metal shell, a honeycomb panel and a sound absorbing material layer, honeycomb panels are provided on both sides of the sound absorbing material layer, and a metal shell is provided on the side of the honeycomb panel away from the sound absorbing material layer.

[0010] Preferably, the sound-absorbing material layer is made of sound-absorbing cotton or polyurethane foam.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The outer side of the shell is wrapped with a sound-absorbing cotton layer, which can absorb the noise at the shell to a certain extent and achieve a certain noise reduction effect; the front noise reduction shell and the rear noise reduction shell can process the noise at both ends of the axial fan body and reduce the possibility of noise propagation outward; the front noise reduction shell and the rear noise reduction shell are both composed of a metal shell, a honeycomb panel and a sound-absorbing material layer. The honeycomb panel and the sound-absorbing material layer improve the sound absorption and noise reduction effect of the front and rear noise reduction shells.

[0013] 2. The blade is arc-shaped and includes an end structure and a rear structure. The thickness of the front structure is greater than that of the rear structure. The noise generated by the blade is relatively small, reducing the generation of noise from the source. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a structural diagram of the main body of the axial flow fan of the utility model;

[0017] Figure 3 This is a schematic structural diagram of the shell and sound-absorbing cotton layer of the utility model;

[0018] Figure 4 It is a structural diagram of the blade of the utility model;

[0019] Figure 5 This utility model Figure 4 Structural diagram from another perspective;

[0020] Figure 6 It is a structural schematic diagram of the noise reduction shell of the utility model.

[0021] In the figure: 1. Axial fan body; 2. Front noise reduction shell; 3. Rear noise reduction shell; 11. Shell; 12. Blades; 13. Mounting seat; 14. Blade seat; 15. Drive motor; 16. Sound-absorbing cotton layer; 121. Front structure; 122. Rear structure; 21. Metal shell; 22. Honeycomb panel; 23. Sound-absorbing material layer. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents selected embodiments of the present invention.

[0023] See also Figure 1-6 In an embodiment of the utility model, a low-noise axial flow fan comprises an axial flow fan body 1, and a front noise reduction shell 2 and a rear noise reduction shell 3 are detachably installed at both ends of the axial flow fan body 1. The front noise reduction shell 2 and the rear noise reduction shell 3 can process the noise at both ends of the axial flow fan body 1 and reduce the possibility of noise propagating outward. The axial flow fan body 1 comprises a shell 11, and a mounting seat 13 is installed in the shell 11. The mounting seat 13 is installed with a driving motor 15, and the driving motor 15 drives a blade seat 14. The blade seat 14 is equipped with a plurality of blades 12 at equal intervals. The outer side of the shell 11 is wrapped with a sound-absorbing cotton layer 16, which can absorb the noise at the shell to a certain extent, thereby achieving a certain noise reduction effect.

[0024] The blade 12 is arc-shaped and includes an end structure and a rear structure 122. The thickness of the front structure 121 is greater than that of the rear structure 122. The noise generated by the blade is relatively small, thereby reducing the generation of noise from the source.

[0025] The front noise reduction shell 2 is a trumpet-shaped structure, and the rear noise reduction shell 3 is a circular ring. The front noise reduction shell 2 and the rear noise reduction shell 3 are both composed of a metal shell 21, a honeycomb panel 22 and a sound-absorbing material layer 23. Honeycomb panels 22 are provided on both sides of the sound-absorbing material layer 23. A metal shell 21 is provided on the side of the honeycomb panel 22 away from the sound-absorbing material layer 23. The sound-absorbing material layer 23 uses sound-absorbing cotton or polyurethane foam. The honeycomb panel 22 and the sound-absorbing material layer 23 improve the sound absorption and noise reduction effects of the front and rear noise reduction shells.

[0026] The working principle of the present utility model is as follows: the outer side of the shell 11 is wrapped with a sound-absorbing cotton layer 16, which can absorb the noise at the shell to a certain extent and achieve a certain noise reduction effect; the front noise reduction shell 2 and the rear noise reduction shell 3 can process the noise at both ends of the axial flow fan body 1, reducing the possibility of noise propagation outward; the front noise reduction shell 2 and the rear noise reduction shell 3 are both composed of a metal shell 21, a honeycomb panel 22 and a sound-absorbing material layer 23. The honeycomb panel 22 and the sound-absorbing material layer 23 improve the sound absorption and noise reduction effects of the front and rear noise reduction shells.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A low-noise axial flow fan, comprising an axial flow fan body (1), characterized in that: The two ends of the axial flow fan body (1) are detachably mounted with a front noise reduction shell (2) and a rear noise reduction shell (3). The axial flow fan body (1) comprises a shell (11). A mounting seat (13) is mounted in the shell (11). A driving motor (15) is mounted on the mounting seat (13). The driving motor (15) drives a blade seat (14). A plurality of blades (12) are mounted on the blade seat (14) at equal intervals. The outer side of the shell (11) is wrapped with a sound-absorbing cotton layer (16).

2. A low-noise axial flow fan according to claim 1, characterized in that: The blade (12) is in an arc shape and comprises a front structure and a rear structure (122). The thickness of the front structure (121) is greater than the thickness of the rear structure (122).

3. The low-noise axial flow fan according to claim 1, characterized in that: The front noise reduction shell (2) is a trumpet-shaped structure, and the rear noise reduction shell (3) is annular.

4. A low-noise axial flow fan according to claim 1 or 3, characterized in that: The front noise reduction shell (2) and the rear noise reduction shell (3) are both composed of a metal shell (21), a honeycomb panel (22) and a sound absorbing material layer (23); honeycomb panels (22) are provided on both sides of the sound absorbing material layer (23); and a metal shell (21) is provided on the side of the honeycomb panel (22) away from the sound absorbing material layer (23).

5. The low-noise axial flow fan according to claim 4, characterized in that: The sound-absorbing material layer (23) is made of sound-absorbing cotton or polyurethane foam.

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