CN217129920U

CN217129920U - Turbulence structure of fan frame

Info

Publication number: CN217129920U
Application number: CN202220800746.0U
Authority: CN
Inventors: 赖华; 谈泽华
Original assignee: Asia Vital Components Shenzhen Co Ltd
Current assignee: Asia Vital Components Shenzhen Co Ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-08-05
Anticipated expiration: 2032-04-07

Abstract

The utility model relates to a fan frame turbulence structure, which comprises a frame body provided with an air inlet side and an air outlet side which are respectively arranged at the two sides of the frame body, and an air flow channel is arranged in the middle of the frame body and penetrates from the air inlet side to the air outlet side, the air flow channel is provided with a channel inner wall which is connected with the air inlet side and the air outlet side, the air inlet side is provided with an inlet communicated with the airflow channel, the inlet is provided with a fragmentation zone positioned between the air inlet side and the inner wall of the channel, the crushing area comprises a plurality of densely distributed fine crushing units, a plurality of gaps are formed among the fine crushing units and communicated with the airflow channel, and an airflow sucked from the air inlet side is crushed by the fine crushing units, so that a part of the airflow is crushed and dispersed into gap turbulence through the gaps among the fine crushing units and enters the airflow channel, and the effect of reducing broadband noise is achieved.

Description

Turbulence structure of fan frame

Technical Field

The utility model relates to a fan frame especially relates to a fan frame torrent structure.

Background

With the improvement of the execution efficiency of the electronic component, the requirement for heat dissipation is increased dramatically, so that active heat dissipation (such as a fan) is also matched in addition to passive heat dissipation; however, the noise of the fan increases with the increasing of the temperature, so that the noise reduction is the first important one of active heat dissipation. The active heat dissipation device such as axial flow fan comprises a fan frame and a fan wheel with a plurality of blades, wherein the fan wheel is pivoted in the fan frame, and the fan frame is provided with an air inlet side and an air outlet side which are respectively arranged at two sides of the fan frame. However, when the axial flow fan is operated, the noise is relatively increased along with the higher rotating speed.

The noise types of the axial flow fan can be divided into broadband noise and narrow-band noise, wherein the broadband noise has two influencing factors: firstly, noise generated by vortex at the tail end of the blade; secondly, the air inlet side sucks a mass of large chaotic air flow, and the air flow disturbance is large to generate noise. The main flow in the current industry is to reduce the gap between the tail ends of the blades of the fan wheel and the inner side of the opposite fan frame, and the other method is to install a rectifying device (such as a waveguide plate) on the air inlet side of the fan frame, but in the two methods, the gap between the tail ends of the blades of the fan wheel and the inner side of the opposite fan frame is also reduced to reduce the noise obviously, but in the actual manufacturing, the method needs to strictly control the high manufacturing precision of the dimensional tolerance of the blades, so that the cost is relatively improved, and the risk of the fan wheel being locked and burned out in operation due to the fact that the gap between the tail ends of the blades and the inner side of the opposite fan frame is reduced and easily clamped by foreign matters.

Therefore, how to solve the above problems and disadvantages is a direction in which the present inventors and related manufacturers in the industry desire to research and improve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can inhale a group of chaotic air current fragmentation with the air inlet side of a fan frame and disperse into a plurality of tiny clearance torrents and reduce blade tail end vortex to effective noise reduction's fan frame torrent structure.

To achieve the above object, the present invention provides a fan frame turbulence structure, which comprises:

the air inlet side is provided with an inlet opening communicated with the airflow channel, the inlet opening is provided with a fragmentation zone which is positioned between the air inlet side and the inner wall of the channel, the fragmentation zone comprises a plurality of finely-crushing units which are densely distributed, a plurality of gaps are formed among the finely-crushing units and communicated with the airflow channel, and an airflow sucked from the air inlet side is fragmented by the finely-crushing units, so that a part of the airflow is fragmented and dispersed into a plurality of gap turbulences through the gaps among the finely-crushing units and enters the airflow channel.

The fan frame turbulence structure, wherein: each fine crushing unit is provided with an upper side and a lower side, the upper sides of the fine crushing units are flush or not flush with each other, and the lower sides of the fine crushing units are flush or not flush with each other.

The fan frame turbulence structure, wherein: the plurality of fine crushing units are arranged on the crushing area in a single row or in a plurality of rows.

The fan frame turbulence structure, wherein: the plurality of fine crushing units are integrally formed or not integrally formed on the crushing zone.

The fan frame turbulence structure, wherein: the multiple fine crushing units are combined in the crushing area by machining, embedding, adhering or sticking nylon buttons.

The fan frame turbulence structure, wherein: the frame body is a single fan frame.

The fan frame turbulence structure, wherein: the plurality of the fine crushing units are in the shape of polygonal cylinders or hemispheres with equal or unequal lengths.

The fan frame turbulence structure, wherein: the inlet is provided with an air inlet surface, the air inlet surface is positioned between the air inlet side and the inner wall of the channel, the air inlet surface is provided with an air guide surface and a setting surface, the air guide surface and the setting surface are positioned between the inner wall of the channel and the air guide surface, and the fragmentation zone is arranged on the setting surface.

Borrow by the aforesaid the utility model discloses a smash from this air inlet side inspiratory air current in this a plurality of fine crushing units in this fragmentation district, make some of this air current break up through the clearance between these a plurality of fine crushing units and scatter into a plurality of clearance torrents and flow in this airflow channel, borrow this effectively to improve this air inlet side and inhale a chaotic air current, and then effectively reach the effect that reduces the broadband tape noise. Furthermore, through the utility model discloses a fan frame torrent structure and a fan wheel pivot mutually and assemble into a fan, can effectively reduce fan blade tail end vortex and reduce the noise that the vortex produced.

Drawings

Fig. 1 is a schematic exploded perspective view of the present invention.

Fig. 2 is a comparison graph of the frequency spectrum of the broadband noise of the fan according to the present invention and the conventional fan.

The reference numbers illustrate: a fan frame turbulence structure 1; a frame body 11; an air intake side 111; an inlet 1110; an inlet face 1110 a; a wind guiding surface 1110 b; a setting surface 1110 c; a fragmentation zone 1111; a shredding unit 1112; an upper side 1113; an underside 1114; two side walls 1115; an outer convex side 1116; a gap 1117; an air outlet side 112; an outlet 1121; a shaft seat 113; a support portion 114; an air flow passage 115; channel inner walls 1151; a fan 2; a stator group 21; a fan wheel 22; a blade 221; the utility model is a curve 31; a conventional curve 32.

Detailed Description

The above objects, together with the structural and functional features thereof, will be best understood from the following description of the preferred embodiment when read in connection with the accompanying drawings.

The utility model provides a fan frame torrent structure 1, please refer to fig. 1, this fan frame torrent structure 1 includes that a framework 11 is single fan frame (like axial fan frame) in this embodiment this framework 11, also can select to the concatenation formula fan, the both sides of this framework 11 are an air inlet side 111 and an air-out side 112 respectively, and the department has an airflow channel 115 in the middle of this framework 11 and runs through to this air-out side 112 by this air inlet side 111, and this airflow channel 115 has a passageway inner wall 1151 and connects air inlet side 111 and this air-out side 112 respectively.

Referring to fig. 1, the air inlet side 111 has an inlet 1110, the air outlet side 112 has an outlet 1121, the inlet 1110 and the outlet 1121 are communicated with the airflow channel 115, and a shaft seat 113 is disposed at the center of the outlet 1121, the shaft seat 113 is connected to the channel inner wall 1151 of the frame 11 by a plurality of supporting portions 114 (e.g., ribs or stationary vanes). The inlet 1110 has an air inlet surface 1110a and a fragmentation zone 1111 respectively located between the air inlet side 111 and the channel inner wall 1151, the air inlet surface 1110a has an air guiding surface 1110b and a setting surface 1110c located between the channel inner wall 1151 and the air guiding surface 1110b, the air guiding surface 1110b is an inclined surface or a vertical surface, and the setting surface 1110c is inclined or vertical to the outlet 1121.

The pulverizing zone 1111 is disposed on the disposing surface 1110c and includes a plurality of fine pulverizing units 1112 distributed in a dense or sparse state, the fine pulverizing units 1112 are integrally formed or not integrally formed on the disposing surface 1110c, the fine pulverizing units 1112 can be selectively disposed on the disposing surface 1110c in a single row or multiple rows in a dense manner, and a gap 1117 is formed between the fine pulverizing units 1112. For example, but not limiting of, the size of the plurality of fine reduction units 1112 is preferably less than or equal to 1 millimeter (mm), and the width of the gap 1117 formed between the plurality of fine reduction units 1112 is also less than or equal to 1 mm, so as to allow at least or more than, for example, 25 (pillar) fine reduction units 1112 to be densely arranged in a single row or in multiple rows in parallel within a unit area of square centimeters that can be implemented on the reduction zone 1111.

In addition, the plurality of fine crushing units 1112 of the crushing zone 1111 is shown as a rectangular cylinder, and is densely formed on the setting surface 1110c of the air intake side 111 in a plurality of rows in a parallel spaced manner by machining (e.g., cutting pins), but is not limited thereto. In other alternative embodiments, the plurality of fine crushing units 1112 can be selected to be polygonal cylinders (e.g. triangular cylinder, rectangular cylinder), hemispheres, regular shapes (e.g. X-shaped or E-shaped), or irregular shapes (e.g. granules) with equal or different lengths, and can be engaged, adhered, or adhered to the mounting surface 1110c by nylon buttons.

Each row comprises a plurality of fine crushing units 1112 arranged in the same horizontal direction, and each fine crushing unit 1112 has an upper side 1113 and a lower side 1114 which are flush with and adjacent to each other, namely, the fine crushing units 1112 in the upper row and the lower row are arranged in the same horizontal direction, but not limited thereto, the upper sides 1113 and the lower sides 1114 of the fine crushing units 1112 in each row are staggered to be not flush with and adjacent to each other, namely, the upper sides 1113 and the lower sides 1114 of the fine crushing units 1112 in each row are not arranged in the same horizontal direction.

Furthermore, two sidewalls 1115 and an outer convex side 1116 are respectively connected between the upper side 1113 and the lower side 1114 of each fine crushing unit 1112, and the outer convex side 1116 faces the direction of the airflow channel 115 and is axially aligned with the channel inner wall 1151, so that the outer convex sides 1116 do not exceed the channel inner wall 1151, but not limited thereto, the length (or height) of each fine crushing unit 1112 is different, for example, the length of the fine crushing units 1112 in the upper row and the lower row is gradually increased from the upper row to the lower row, or is gradually increased from the lower row to the upper row, so that the outer convex sides 1116 of the fine crushing units 1112 in the upper row and the lower row are not axially aligned with each other.

The gaps 1117 formed between the mutually opposite side walls 1115 of each two of the reducing units 1112 in each row are communicated with the airflow channel 115, and the gaps 1117 are equal in the embodiment (shown in fig. 1). However, in another embodiment, the gaps 1117 between the plurality of fine pulverization elements 1112 are not equal. Thus, when an air flow is sucked from the air guide surface 1110b of the air inlet side 111 of the frame 11, a part of the air flow collides with the plurality of fine crushing units 1112 on the crushing zone 1111 and is crushed, so that the part of the air flow is crushed and dispersed into a plurality of fine gap turbulences through the plurality of gaps 1117 and flows into the air flow channel 115, and the noise reduction is achieved by the small air flow disturbance of the plurality of gap turbulences, so that the broadband noise generated by the large air flow disturbance of a chaotic air flow sucked from the air inlet side 111 is effectively improved.

In addition, referring to fig. 1, a stator set 21 is sleeved outside the shaft seat 113 of the frame 11, and the shaft seat 113 and a fan wheel 22 with a plurality of blades 221 accommodated in the airflow channel 115 are pivoted together, so that the frame 11, the stator set 21 and the fan wheel 22 form a fan 2 (such as an axial fan). When the fan wheel 22 of the fan 2 rotates to draw an air flow, the plurality of fine crushing units 1112 crush and divide a part of the air flow sucked from the air inlet side 111 of the frame 11, so that the part of the air flow is crushed and dispersed into a plurality of gap turbulences through the plurality of gaps 1117 to flow into the air flow channel 115, and then the air flow passing through a gap between the tail ends of the plurality of blades 221 of the fan wheel 22 and the channel inner wall 1151 is disturbed little to reduce (reduce) the vortex generated at the tail ends of the plurality of blades 221 and reduce the broadband noise generated by the vortex, and the gap turbulences flowing into the air flow channel 115 are pressurized by the plurality of blades 221 of the fan wheel 22 and then flow out from the outlet 1121 of the air outlet side 112. In addition, referring to fig. 2, which is a comparison graph of frequency spectrum of broadband noise of the fan according to the present invention and the conventional fan, the vertical axis represents Sound Pressure Level (SPL) and its unit is db (SPL); the horizontal axis represents frequency (f) and is in hertz (Hz). As shown in the figure, the curve 31 (solid curve) of the present invention is lower than the known curve 32 (dotted curve), and the broadband noise of the fan of the present invention is 50.36db (spl) which is obviously lower than the known broadband noise of the fan of 51.73db (spl), therefore, the present invention effectively achieves the reduction of the broadband noise of the fan in comparison with the known method.

Although the foregoing shows the frame 11 as a single fan frame, it is not limited thereto. In another alternative embodiment, the frame 11 includes an upper frame and a lower frame connected in series to form the frame, or the frame 11 is a separate upper frame for being disposed at the air inlet side of another fan frame (such as an axial fan frame) as a device at the air inlet side.

Therefore, by the utility model discloses set up a large amount of and densely arranged's fine crushing unit 1112 at this air inlet side 111, can improve this air inlet side 111 and inhale a group of chaotic air current and reduce the noise that the vortex of these a plurality of blade 221 tail ends produced, borrow this to effectively reach the effect that reduces broadband noise and simple manufacture.

Claims

1. A fan frame turbulence structure, comprising:

the air inlet side is provided with an inlet communicated with the airflow channel, the inlet is provided with a fragmentation zone which is positioned between the air inlet side and the inner wall of the channel, the fragmentation zone comprises a plurality of finely-crushing units which are densely distributed, and a plurality of gaps are formed among the finely-crushing units and are communicated with the airflow channel.

2. The fan frame turbulence structure of claim 1, wherein: each fine crushing unit is provided with an upper side and a lower side, the upper sides of the plurality of fine crushing units are flush or not flush with each other, and the lower sides of the plurality of fine crushing units are flush or not flush with each other.

3. The fan frame turbulence structure of claim 1, wherein: the plurality of fine crushing units are arranged on the crushing area in a single row or in a plurality of rows.

4. The fan frame turbulence structure of claim 3, wherein: the plurality of fine crushing units are integrally formed or not integrally formed on the crushing zone.

5. The fan frame turbulence structure of claim 1, wherein: the multiple fine crushing units are combined in the crushing area by machining, embedding, adhering or sticking nylon buttons.

6. The fan frame turbulence structure of claim 1, wherein: the frame body is a single fan frame.

7. The fan frame turbulence structure of claim 1, wherein: the plurality of the fine crushing units are in the shape of polygonal cylinders or hemispheres with equal or unequal lengths.

8. The fan frame turbulence structure of claim 1, wherein: the inlet is provided with an air inlet surface, the air inlet surface is positioned between the air inlet side and the inner wall of the channel, the air inlet surface is provided with an air guide surface and a setting surface, the air guide surface and the setting surface are positioned between the inner wall of the channel and the air guide surface, and the fragmentation zone is arranged on the setting surface.