Low-noise axial flow fan

Abstract

The low-noise axial flow fan comprises an outer machine shell, a first heat dissipation hole is formed in the side wall of the outer machine shell, a first noise reduction cover is arranged on the outer side of the first heat dissipation hole, the two ends of the first noise reduction cover are open, a second noise reduction cover is arranged beside the openings, and the first heat dissipation hole is formed between the first noise reduction cover and the second noise reduction cover. A first noise reduction baffle is arranged in one end of the outer machine shell, a second noise reduction baffle is arranged on the inner side of the first noise reduction baffle through a connecting shaft, and a Z-shaped heat dissipation channel is arranged between the first noise reduction baffle and the second noise reduction baffle. And meanwhile, a first noise reduction baffle and a second noise reduction baffle are arranged at one end of the outer machine shell, a Z-shaped heat dissipation channel is formed between the first noise reduction baffle and the second noise reduction baffle, noise reduction treatment can be conducted on the other end of the outer machine shell, and the noise reduction effect is high.

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, usually in situations where the flow rate is high but the pressure is low. Axial flow fans are mainly composed of fan impellers and casings, and are mainly used for ventilation or heat dissipation in places such as metallurgy, chemical industry, light industry, food, medical equipment, mechanical equipment and civil buildings. When an axial flow fan is working, the motor needs to rotate at high speed, and a high-speed rotating motor will generate a lot of noise, forming noise pollution, affecting the work and rest of the staff.

[0003] A self-heating low-noise axial flow fan with application number 202222218189.4 in the prior art relates to the field of axial flow fans, which includes an axial flow fan body, a water inlet pipe and a water outlet pipe installed on the inner wall of the axial flow fan body, a water supply assembly installed on the top of the axial flow fan body for cooling the inside of the axial flow fan body, and a connecting assembly installed on the axial flow fan body for connecting the water inlet pipe and the water outlet pipe, wherein the water supply assembly is connected to the water inlet pipe and the water outlet pipe. This application has the effect of self-dissipating heat for the axial flow fan and reducing the operating noise at the same time, but the noise reduction area and the heat dissipation channel are small, resulting in poor noise reduction and heat dissipation effect of the motor. Utility Model Content

[0004] The utility model aims to provide a low-noise axial flow fan to solve the problem in the prior art that the noise reduction area and the heat dissipation channel are small, resulting in poor noise reduction and heat dissipation effect of the motor.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a low-noise axial flow fan, comprising an outer casing, an electric motor is installed inside the outer casing through a connecting seat, a first heat dissipation hole is opened on the side wall of the outer casing, a first noise reduction cover is provided on the outside of the first heat dissipation hole, and both ends of the first noise reduction cover are open, a second noise reduction cover is provided beside the opening, a first heat dissipation hole is provided between the first noise reduction cover and the second noise reduction cover, a first noise reduction baffle is provided inside one end of the outer casing, a second noise reduction baffle is provided on the inside of the first noise reduction baffle through a connecting shaft, a Z-shaped heat dissipation channel is provided between the first noise reduction baffle and the second noise reduction baffle, and a second heat dissipation hole is provided in the middle part of the first noise reduction baffle.

[0006] Furthermore, a first sound-absorbing layer is disposed on an inner wall of the first noise reduction cover, a sound-absorbing groove is disposed in the second noise reduction cover, and a second sound-absorbing layer is disposed on an inner wall of the sound-absorbing groove.

[0007] Furthermore, the first sound-absorbing layer and the second sound-absorbing layer are both made of sound-absorbing cotton, and the thickness of the first sound-absorbing layer is twice the thickness of the second sound-absorbing layer.

[0008] Furthermore, a positioning plate is provided on the outer side of the first noise reduction baffle, and the positioning plate is clamped on the inner wall of one end of the outer casing and fixed by a locking bolt.

[0009] Furthermore, the second noise reduction baffle plate inside the first noise reduction baffle plate is configured as a circular plate, and the outer diameter of the second noise reduction baffle plate is greater than the inner diameter of the second heat dissipation hole.

[0010] Furthermore, a third sound-absorbing layer is provided inside the first noise reduction baffle and the second noise reduction baffle, and the thickness of the third sound-absorbing layer is 1.5-3 mm.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides a first noise reduction cover and a second noise reduction cover on the outer side of a first heat dissipation hole on the side wall of an outer casing, a first sound-absorbing layer is provided on the inner wall of the first noise reduction cover, and a second sound-absorbing layer is provided in the sound-absorbing groove of the second noise reduction cover, so that the outer side of the first heat dissipation hole of the motor on the side wall of the outer casing can be subjected to noise reduction treatment, and the noise leakage generated when the motor is working can be reduced, and the side noise reduction effect is better. At the same time, a first noise reduction baffle and a second noise reduction baffle are provided at one end of the outer casing, a Z-shaped heat dissipation channel is provided between the first noise reduction baffle and the second noise reduction baffle, and a third sound-absorbing layer is provided on the inner side of the first noise reduction baffle and the second noise reduction baffle, so that the other end of the outer casing can be subjected to noise reduction treatment, and the noise leakage generated when the motor is working can be further reduced, and the noise reduction and heat dissipation effect is better.

[0013] The utility model provides a positioning plate on the outer side of the first noise reduction baffle, and the positioning plate is clamped on the inner wall of one end of the outer casing and fixed by a locking bolt, so that it is convenient to install and fix the first noise reduction baffle and the second noise reduction baffle inside one end of the outer casing, and the installation and fixation have high stability, and disassembly and assembly are convenient and quick. 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 This is a main cross-sectional view of the overall structure of the utility model;

[0016] Figure 2 It is a cross-sectional view at AA of the utility model;

[0017] Figure 3 This is a schematic diagram of the noise reduction baffle structure of the utility model.

[0018] In the figure: 1. outer casing; 2. connecting seat; 3. first heat dissipation hole; 4. first noise reduction cover; 5. second noise reduction cover; 6. first sound-absorbing layer; 7. sound-absorbing groove; 8. first noise reduction baffle; 9. positioning plate; 10. second heat dissipation hole; 11. connecting shaft; 12. second noise reduction baffle; 13. third sound-absorbing layer; 14. locking bolt; 15. motor; 16. heat dissipation port; 17. Z-shaped heat dissipation channel; 18. second sound-absorbing layer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 , Figure 2 , Figure 3 In an embodiment of the utility model, a low-noise axial flow fan comprises an outer casing 1, an electric motor 15 is installed inside the outer casing 1 through a connecting seat 2, a first heat dissipation hole 3 is opened on the side wall of the outer casing 1, a first noise reduction cover 4 is arranged on the outside of the first heat dissipation hole 3, and both ends of the first noise reduction cover 4 are open, a second noise reduction cover 5 is arranged beside the opening, a heat dissipation port 16 is arranged between the first noise reduction cover 4 and the second noise reduction cover 5, a first sound-absorbing layer 6 is arranged on the inner wall of the first noise reduction cover 4, a sound-absorbing groove 7 is arranged in the second noise reduction cover 5, and a second sound-absorbing layer 18 is arranged on the inner wall of the sound-absorbing groove 7, the first sound-absorbing layer 6 and the second sound-absorbing layer 18 are both made of sound-absorbing cotton, and the thickness of the first sound-absorbing layer 6 is twice the thickness of the second sound-absorbing layer 18, so that the outside of the heat dissipation port 16 of the side wall of the outer casing 1 can be subjected to noise reduction treatment, thereby reducing the noise leakage generated when the motor 15 is working, and the side noise reduction effect is better.

[0021] like Figure 1 and Figure 3 As shown, in order to further reduce the leakage of noise generated when the motor 15 is working, a first noise reduction baffle 8 is provided inside one end of the outer casing 1, and a second noise reduction baffle 12 is provided on the inner side of the first noise reduction baffle 8 through a connecting shaft 11, and a Z-shaped heat dissipation channel 17 is provided between the first noise reduction baffle 8 and the second noise reduction baffle 12. A second heat dissipation hole 10 is opened in the middle part of the first noise reduction baffle 8, and the second noise reduction baffle 12 on the inner side of the first noise reduction baffle 8 is set as a circular plate, and the outer diameter of the second noise reduction baffle 12 is larger than the inner diameter of the second heat dissipation hole 10, and a third sound-absorbing layer 13 is provided on the inner side of the first noise reduction baffle 8 and the second noise reduction baffle 12, and the thickness of the third sound-absorbing layer 13 is 1.5-3mm, so that the other end of the outer casing 1 can be subjected to noise reduction treatment, thereby further reducing the leakage of noise generated when the motor 15 is working, and the noise reduction and heat dissipation effect is good.

[0022] like Figure 1 and Figure 3 As shown, in order to install and fix the noise reduction baffle inside one end of the outer casing 1, a positioning plate 9 is provided on the outside of the first noise reduction baffle 8. The positioning plate 9 is clamped on the inner wall of one end of the outer casing 1 and fixed by a locking bolt 14, so that it is convenient to install and fix the first noise reduction baffle 8 and the second noise reduction baffle 12 inside one end of the outer casing 1, and the installation and fixation have high stability, and disassembly and assembly are convenient and quick.

[0023] The working principle and use process of the utility model are as follows: when in use, a first noise reduction cover 4 and a second noise reduction cover 5 are provided on the outer side of the heat dissipation port 16 of the side wall of the outer casing 1, a first sound-absorbing layer 6 is provided on the inner wall of the first noise reduction cover 4, and a second sound-absorbing layer 18 is provided in the sound-absorbing groove 7 of the second noise reduction cover 5, so that noise reduction processing can be performed on the outer side of the heat dissipation port 16 of the side wall of the outer casing 1, and at the same time, a first noise reduction baffle 8 and a second noise reduction baffle 12 are provided at one end of the outer casing 1, a Z-shaped heat dissipation channel 17 is provided between the first noise reduction baffle 8 and the second noise reduction baffle 12, and a third sound-absorbing layer 13 is provided on the inner side of the first noise reduction baffle 8 and the second noise reduction baffle 12, so that noise reduction processing can be performed on the other end of the outer casing 1, so as to further reduce the leakage of noise generated when the motor 15 is working, and the noise reduction and heat dissipation effects are better.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low-noise axial flow fan, comprising an outer casing (1), characterized in that: An electric motor (15) is installed inside the outer casing (1) via a connecting seat (2); a first heat dissipation hole (3) is provided on a side wall of the outer casing (1); a first noise reduction cover (4) is provided outside the first heat dissipation hole (3); both ends of the first noise reduction cover (4) are open, and a second noise reduction cover (5) is provided beside the opening; a heat dissipation port (16) is provided between the first noise reduction cover (4) and the second noise reduction cover (5); a first noise reduction baffle (8) is provided inside one end of the outer casing (1); a second noise reduction baffle (12) is provided inside the first noise reduction baffle (8) via a connecting shaft (11); a Z-shaped heat dissipation channel (17) is provided between the first noise reduction baffle (8) and the second noise reduction baffle (12); and a second heat dissipation hole (10) is provided in the middle of the first noise reduction baffle (8).

2. A low-noise axial flow fan according to claim 1, characterized in that: The first noise reduction cover (4) has an inner wall provided with a first sound-absorbing layer (6), the second noise reduction cover (5) has an inner wall provided with a sound-absorbing groove (7), and the inner wall of the sound-absorbing groove (7) has a second sound-absorbing layer (18).

3. A low-noise axial flow fan according to claim 2, characterized in that: The first sound-absorbing layer (6) and the second sound-absorbing layer (18) are both made of sound-absorbing cotton, and the thickness of the first sound-absorbing layer (6) is twice the thickness of the second sound-absorbing layer (18).

4. A low-noise axial flow fan according to claim 1, characterized in that: A positioning plate (9) is provided on the outside of the first noise reduction baffle (8); the positioning plate (9) is clamped on the inner wall of one end of the outer casing (1) and fixed by a locking bolt (14).

5. A low-noise axial flow fan according to claim 4, characterized in that: The second noise reduction baffle (12) inside the first noise reduction baffle (8) is configured as a circular plate, and the outer diameter of the second noise reduction baffle (12) is greater than the inner diameter of the second heat dissipation hole (10).

6. A low-noise axial flow fan according to claim 1, characterized in that: A third sound-absorbing layer (13) is provided inside the first noise-reducing baffle (8) and the second noise-reducing baffle (12), and the thickness of the third sound-absorbing layer (13) is 1.5-3 mm.

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