CN218325388U

CN218325388U - Non-return low-noise radiating fan

Info

Publication number: CN218325388U
Application number: CN202222354833.0U
Authority: CN
Inventors: 王诤
Original assignee: Hangzhou Winway Electronics Co ltd
Current assignee: Hangzhou Winway Electronics Co ltd
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2023-01-17
Anticipated expiration: 2032-09-05

Abstract

The utility model discloses a no backward flow low noise radiator fan, shell air-out end central part is fixed with the motor and drives the wheel hub gyration, it has three blades radially to arrange along circumference on the wheel hub, the inner edge and the wheel hub rigid coupling of blade, the outer fringe of blade and the inner circle rigid coupling of solar or lunar halo, the outer lane of solar or lunar halo is equipped with solar or lunar halo water conservancy diversion conical surface, be equipped with on the shell air-out end inside wall with solar or lunar halo water conservancy diversion conical surface matched with casing water conservancy diversion conical surface, form the suppression backward flow wind channel between solar or lunar halo water conservancy diversion conical surface and the casing water conservancy diversion conical surface, shell air inlet end central part forms the main inlet air passageway with blade matched with, shell air inlet end week portion establishes the vice inlet air passageway that forms and suppress backward flow wind channel matched with through the coaxial heart interval cover of a plurality of conical barrel. The fan is beneficial to reducing the backflow of the fan, enhancing the air quantity, inhibiting the vortex noise of the fan and reducing the wind noise by improving the air channel structure of the fan.

Description

Non-return low-noise radiating fan

Technical Field

The utility model relates to an axial fan technical field especially relates to a no backward flow low noise radiator fan.

Background

The axial flow fan is a fan in which air flows in a rotational direction of a shaft on which blades are mounted when the fan operates, and the size of the axial flow fan is different depending on a place and a field of application. In order to meet the requirement of higher standard heat dissipation performance, the method of increasing the rotation speed of the fan is usually adopted, however, the rotation speed of the fan is increased, and the fan also brings higher noise, the fan backflow interferes with the fan blades, and larger noise is easily caused, so that the fan structure needs to be improved to reduce the fan noise.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to prior art not enough, the technical problem that solve provides a no backward flow low noise radiator fan, improves fan wind channel structure, helps reducing the fan backward flow, and the reinforcing amount of wind suppresses fan vortex noise, reduces wind and makes an uproar.

The utility model discloses a make above-mentioned technical problem can solve through following technical scheme.

The backflow-free low-noise radiating fan comprises a motor, a hub, a shell, blades and a wind ring, wherein the central part of an air outlet end of the shell is fixed with the motor and drives the hub to rotate, three blades are radially arranged on the hub along the circumferential direction, the inner edges of the blades are fixedly connected with the hub, the outer edges of the blades are fixedly connected with the inner ring of the wind ring, the outer ring of the wind ring is provided with a wind ring flow guide conical surface, the inner side wall of the air outlet end of the shell is provided with a shell flow guide conical surface matched with the wind ring flow guide conical surface, a backflow-inhibiting air channel is formed between the wind ring flow guide conical surface and the shell flow guide conical surface, a main air inlet channel matched with the blades is formed in the central part of an air inlet end of the shell, and an auxiliary air inlet channel matched with the backflow-inhibiting air channel is formed in the peripheral part of the air inlet end of the shell through coaxial and concentric interval sleeves of a plurality of conical cylinders.

Preferably, the inner edge extends outward to the outer edge in a radially outward expanding manner, the blade is provided with an inward concave arc-shaped front edge and a linear rear edge, the outer end of the linear rear edge is connected with the rear end of the outer edge in a converging manner, and the inner end of the linear rear edge is bent towards the inward concave arc-shaped front edge to form a rear edge extension part and is connected with the rear end of the inner edge in a converging manner.

Preferably, noise reduction sawteeth are arranged on the straight rear edge.

Preferably, the straight trailing edge and the trailing edge extension form an obtuse angle therebetween.

Preferably, the obtuse angle is 120 to 145 degrees.

Preferably, the linear trailing edge length is at least four times the trailing edge extension length.

Preferably, the surfaces of the two sides of the blade are respectively a suction curved surface and a pressure curved surface.

Preferably, the hub, the blades and the wind ring are integrally injection molded.

Preferably, orthographic projections of the three blades in the axial direction do not overlap each other.

The utility model has the advantages that:

1. through optimizing and improving fan structure, add vice inlet air channel in shell air inlet end week portion, induced air gets into vice inlet air channel velocity of flow homogeneous, velocity of flow accelerate, is of value to and avoids taking place the turbulent flow, advances along the water conservancy diversion that restraines return flow wind channel, and with the smooth and easy confluence of mainstream wind, help reducing the fan backward flow, restrain the formation of air vortex, when reinforcing the air output, reduce the vortex noise.

2. The straight-line-shaped rear edge is formed by the blades, the outer side end of the straight-line-shaped rear edge is connected with the rear side end of the outer edge in a converging mode, the inner side end of the straight-line-shaped rear edge extends towards the concave arc-shaped front edge and is connected with the rear side end of the inner edge in a converging mode, the rear edge of the blades forms a concave portion close to the tail end of the hub, air outlet efficiency is greatly improved, and air outlet quantity is enhanced.

3. The noise reduction sawteeth are additionally arranged on the linear rear edge, so that the turbulence noise generated on the blade is reduced, the wind cutting sound generated by the rotation of the blade is reduced, and the wind noise is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a front view of the structure of fig. 1 with the outer shell removed.

In the figure: 1-motor, 2-hub, 3-shell, 4-blade, 5-wind ring, 6-inner edge, 7-outer edge, 8-wind ring diversion conical surface, 9-shell diversion conical surface, 10-backflow inhibiting air duct, 11-main air inlet channel, 12-auxiliary air inlet channel, 13-conical cylinder, 14-concave arc front edge, 15-linear rear edge and 16-rear edge extension part.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.

As shown in fig. 1 and fig. 2, the utility model provides a no backward flow low noise radiator fan, including motor 1, wheel hub 2, shell 3, blade 4 and solar or lunar halo 5, specific saying so, wheel hub 2 blade 4 with solar or lunar halo 5 injection moulding as an organic whole. The motor 1 is fixed at the central part of the air outlet end of the shell 3 and drives the hub 2 to rotate, three blades 4 are radially arranged on the hub 2 along the circumferential direction, and further orthographic projections of the three blades 4 along the axial lead direction are not overlapped. The surfaces of the two sides of the blade 4 are respectively a suction curved surface and a pressure curved surface. The inner edge 6 of the blade 4 is fixedly connected with the hub 2, the outer edge 7 of the blade 4 is fixedly connected with the inner ring of the wind ring 5, in this embodiment, the inner edge 6 extends to the outer edge 7 in an outward expanding manner along the radial direction, the blade 4 is provided with an inward concave arc-shaped front edge 14 and a linear rear edge 15, the outer side end of the linear rear edge 15 is connected with the rear side end of the outer edge 7 in a converging manner, the inner side end of the linear rear edge 15 bends towards the inward concave arc-shaped front edge 14 to form a rear edge extension 16 and is connected with the rear side end of the inner edge 6 in a converging manner, specifically, an obtuse angle is formed between the linear rear edge 15 and the rear edge extension 16, and the obtuse angle is 120-145 degrees. Further, the linear trailing edge 15 is at least four times as long as the trailing edge extension 16. And noise reduction sawteeth are arranged on the linear rear edge 15.

The outer lane of solar or lunar halo 5 is equipped with solar or lunar halo water conservancy diversion conical surface 8, be equipped with on 3 air-out end inside walls of shell with solar or lunar halo water conservancy diversion conical surface 8 matched with casing water conservancy diversion conical surface 9, solar or lunar halo water conservancy diversion conical surface 8 with form between the casing water conservancy diversion conical surface 9 and restrain backward

flow wind channel

10, 3 air inlet end central parts of shell form with blade 4 matched with main

inlet air channel

11, 3 air inlet end week parts of shell through 13 coaxial heart interval cover establish with a plurality of circular cone barrel 13 with restrain backward flow wind channel 10 matched with vice inlet air channel 12.

While the invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the claims of the present application belong to the protection scope of the present invention.

Claims

1. No backward flow low noise radiator fan, characterized by: including motor (1), wheel hub (2), shell (3), blade (4) and wind circle (5), shell (3) air-out end central part is fixed with motor (1) and drive wheel hub (2) gyration, wheel hub (2) are gone up and radially have arranged three along circumference blade (4), the inner edge (6) of blade (4) with wheel hub (2) rigid coupling, the outer fringe (7) of blade (4) with the inner circle rigid coupling of wind circle (5), the outer lane of wind circle (5) is equipped with wind circle water conservancy diversion conical surface (8), be equipped with on shell (3) air-out end inside wall with wind circle water conservancy diversion conical surface (8) matched with casing water conservancy diversion conical surface (9), wind circle water conservancy diversion conical surface (8) with form between casing water conservancy diversion conical surface (9) and restrain backward flow wind channel (10), shell (3) air-in end central part form with blade (4) matched with main inlet air channel (11), shell (3) air-in the end week portion through a plurality of barrels (13) overlap establish form with coaxial suppression backward flow air channel (12) matched with the vice air inlet air channel (12).

2. The non-return low-noise radiator fan according to claim 1, wherein: the inner edge (6) extends to the outer edge (7) in an outward expanding mode along the radial direction, the blade (4) is provided with an inwards concave arc-shaped front edge (14) and a linear rear edge (15), the outer side end of the linear rear edge (15) is connected with the rear side end of the outer edge (7) in a converging mode, and the inner side end of the linear rear edge (15) bends towards the inwards concave arc-shaped front edge (14) to form a rear edge extending portion (16) and is connected with the rear side end of the inner edge (6) in a converging mode.

3. The no-backflow low-noise heat dissipation fan as claimed in claim 2, wherein: and noise reduction sawteeth are arranged on the linear rear edge (15).

4. The no-backflow low-noise heat dissipation fan as claimed in claim 2, wherein: the straight rear edge (15) and the rear edge extension (16) form an obtuse angle.

5. The no-backflow low-noise heat dissipation fan as claimed in claim 4, wherein: the obtuse angle is 120 to 145 degrees.

6. The no-backflow low-noise heat dissipation fan as claimed in claim 2, wherein: the linear trailing edge (15) has a length at least four times the length of the trailing edge extension (16).

7. The non-return low-noise radiator fan according to claim 1, wherein: the surfaces of the two sides of the blade (4) are respectively a suction curved surface and a pressure curved surface.

8. The non-return low-noise radiator fan according to claim 1, wherein: the hub (2), the blades (4) and the wind ring (5) are integrally formed in an injection molding mode.

9. The non-return low-noise radiator fan according to claim 1, wherein: the orthographic projections of the three blades (4) along the axial lead direction are not overlapped.