CN201786755U

CN201786755U - Cooling fan

Info

Publication number: CN201786755U
Application number: CN2010202942635U
Authority: CN
Inventors: 洪银树; 方议乐
Original assignee: Sunonwealth Electric Machine Industry Co Ltd
Current assignee: Sunonwealth Electric Machine Industry Co Ltd
Priority date: 2010-08-17
Filing date: 2010-08-17
Publication date: 2011-04-06
Anticipated expiration: 2020-08-17

Abstract

A cooling fan comprises a fan frame, a fan wheel and a coil assembly. The fan frame is provided with an air inlet and an air outlet, a passage and a flow guide portion are formed between the air inlet and the air outlet, a transition is formed between the passage and the flow guide portion, the fan wheel and the coil assembly are combined inside the fan frame, a center axis is defined on the fan wheel, the flow guide portion of the fan frame is expanded outwards radially on the basis of the center axis, a first reference surface and a second reference surface are defined on the fan wheel, the first reference surface passes through the top edge of the fan wheel and is perpendicular to the center axis, the second reference surface passes through the bottom edge of the fan wheel and is perpendicular to the center axis, and the transition is arranged between the first reference surface and the second reference surface, so that flow guide effect is increased and noise is reduced.

Description

Radiation fan

Technical field

The utility model is about a kind of radiation fan, and especially a kind of exhaust outlet has the axial-flow type radiator fan of diversion division design.

Background technique

Please refer to shown in Figure 1ly, disclose a kind of existing axial-flow type radiator fan 7, this radiation fan 7 comprises fan frame 71, an impeller 72 and a motor 73.This fan frame 71 forms a relative wind inlet 711 and an exhaust outlet 712 in the axial direction, and these fan frame 71 inside are provided with a pedestal 713; This impeller 72 rotatably is incorporated into this fan frame 71 inside; This motor 73 is incorporated into the pedestal 713 of this fan frame 71, in order to drive this impeller 72 rotary works, so that a radiating effect to be provided.

Yet the exhaust outlet 712 of this radiation fan 7 there is no the structural design that can increase air-out area and diversion function is provided, and forms unsettled flow field easily and produces improper noise, and cause radiating effect to reduce; Therefore, when the usefulness of electronic product constantly promoted now, this radiation fan 7 can't satisfy the actual radiating requirements of this electronic product fully.

For this reason, please refer to shown in Figure 2, be No. the 200942148th, TaiWan, China application " fan and fan frame thereof " patent of invention case, these existing radiation fan 8 employed fan frames 81 have a passage 811, and these passage 811 two ends form a wind inlet 812 and an exhaust outlet 813 respectively; Again, these fan frame 81 contiguous these exhaust outlet 813 places form a diversion division 814 of the expansion that extends radially outwardly; Whereby, when being arranged at an impeller 82 rotary works of these fan frame 81 inside, this exhaust outlet 813 can increase the air-out area of air-flow by this diversion division 814, to promote the radiating effect of this existing radiation fan 8.

Referring again to shown in Figure 2, the adjoining mutually position of the passage 811 of this existing radiation fan 8 and this diversion division 814 is a turning point C, this turning point C is adjacent to the opening periphery of this exhaust outlet 813, in other words, the structural design of existing radiation fan 8 will cause this passage 811 depth d 1 in the axial direction much larger than this diversion division 814 depth d 2 in the axial direction easily; Therefore, cause this impeller 82 to pass through in the process of this passage 811 and this diversion division 814 in regular turn via this wind inlet 812 at the introducing air-flow easily, this diversion division 814 can be quite limited in order to the air-guiding effect, and can't effectively reach the effect that promotes air-out area; Moreover this air-flow is easier to be concentrated between this passage 811 and this impeller 82, makes impeller 82 in the process of air-guiding, may produce bigger wind and cut noise, so necessity of being improved is arranged.

The model utility content

The utility model purpose is the shortcoming of the above-mentioned existing radiation fan of improvement, and a kind of radiation fan that can further be lifted out the water conservancy diversion effect in air port is provided.

Another purpose of the utility model provides a kind of holding concurrently can effectively reduce the radiation fan that wind is cut noise.

According to the utility model radiation fan, comprise: a fan frame, have a wind inlet and an exhaust outlet, form a passage and a diversion division between this wind inlet and this exhaust outlet, this passage and this diversion division form a turning point in adjoining position mutually in the inboard perisporium of this fan frame; One impeller is rotatably in conjunction with this fan frame inside; And a coil groups, be arranged at this fan frame inside in order to drive this impeller rotation; Wherein this impeller defines a central axis, the diversion division of this fan frame is the expansion of benchmark radially outward with this central axis, this impeller definition in addition has one first reference level and one second reference level, this first reference level is by the apical margin of this impeller and perpendicular to this central axis, this second reference level passes through the root edge of this impeller and perpendicular to this central axis, this turning point is between this first reference level and this second reference level.

Useful technique effect of the present utility model is: because this passage and this diversion division form a turning point in adjoining position mutually in the inboard perisporium of this fan frame, and the turning point is just between this first reference level and second reference level; Therefore after this impeller introducing air-flow enters this passage via this wind inlet, the pressure accumulation effect that this passage provided, and after this impeller air-guiding enters this diversion division, the water conservancy diversion effect that this diversion division provided, both will be comparatively balanced, avoiding the generation of turbulent flow, and can promote the radiating effect of this radiation fan.

Description of drawings

Fig. 1: the assembled sectional view of first kind of existing radiation fan.

Fig. 2: the assembled sectional view of second kind of existing radiation fan.

Fig. 3: the three-dimensional exploded view of the utility model first embodiment's radiation fan.

Fig. 4: the assembled sectional view of the utility model first embodiment's radiation fan.

Fig. 5: the assembled sectional view of the utility model second embodiment's radiation fan.

Fig. 6: the assembled sectional view of the utility model the 3rd embodiment's radiation fan.

[primary component symbol description]

1a, 1b, 1c radiation fan 11 fan frames 111 wind inlets 112 exhaust outlets

113 pedestals, 114 links, 115 axis parts, 116 passages

117 diversion divisions, 12 impellers, 121 wheel hubs, 122 blades

13 coil groups, 7 radiation fans, 71 fan frames, 711 wind inlets

712 exhaust outlets, 713 pedestals, 72 impellers, 73 motors

8 radiation fans, 81 fan frames, 811 passages, 812 wind inlets

813 exhaust outlets, 814 diversion divisions, 82 impellers

Embodiment

For above-mentioned and other purpose of the present utility model, feature and advantage can be become apparent, preferred embodiment of the present utility model cited below particularly, and conjunction with figs. are described in detail below:

Please refer to shown in Figure 3, the utility model first embodiment's radiation fan 1a comprise at least one the fan frame 11, an impeller 12 and a coil groups 13.This fan frame 11 can be the framework of an axial flow fan; This impeller 12 rotatably is incorporated into this fan frame 11 inside; This coil groups 13 is arranged at the inside of this fan frame 11, in order to drive this impeller 12 rotary works.

This fan frame 11 forms a relative wind inlet 111 and an exhaust outlet 112 in the axial direction, and these fan frame 11 inside are provided with a pedestal 113, this pedestal 113 can connect the inboard perisporium of this fan frame 11 by several links 114 (as rib or stator blade etc.), and this pedestal 113 is provided with an axis part 115; Again, be formed with a passage 116 and a diversion division 117 between the wind inlet 111 of this fan frame 11 and the exhaust outlet 112, wherein this passage 116 is close to these wind inlets 111, these diversion division 117 contiguous these exhaust outlets 112, this passage 116 and this diversion division 117 form a turning point C in adjoining position mutually in the inboard perisporium of this fan frame 11.

This impeller 12 has a wheel hub 121, and the outer circumferential face of this wheel hub 121 is provided with several blades 122; Wherein the wheel hub 121 of this impeller 12 is rotatably in conjunction with the axis part 115 of this pedestal 113.

This coil groups 13 is arranged at pedestal 113 inside of this fan frame 11, so that drive this impeller 12 rotary works.

Please refer to shown in Figure 4ly, the major technique of the utility model first embodiment's radiation fan 1a is characterised in that: this impeller 12 definition one axis L, and the diversion division 117 of this fan frame 11 is that the benchmark radially outward is expanded with this axis L; Wherein these impeller 12 definition have one first reference level S1 and one second reference level S2, and this first reference level S1 is by the apical margin of this impeller 12 and perpendicular to this axis L, and this second reference level S2 passes through towards the root edge of this impeller 12 and perpendicular to this axis L; Again, the adjoining mutually turning point C of this passage 116 and this diversion division 117 is between this first reference level S1 and this second reference level S2.

By above-mentioned technical characteristics, can guarantee that this turning point C can be excessively near this exhaust outlet 112, in other words, this diversion division 117 height in the axial direction, can guarantee this impeller 12 introduce air-flow via this wind inlet 111 by these passage 116 backs and enter in the process of this diversion division 117, this diversion division 117 can more effectively reach the effect of air-guiding, and holds concurrently and can promote air-out area; Moreover the utility model radiation fan 1a can prevent that more the air-flow concentrations between this passage 116 and this impeller 12, making impeller 12 in the process of air-guiding, is unlikely to produce bigger wind and cuts noise.

Please refer to shown in Figure 5, the utility model second embodiment's radiation fan 1b comprise equally at least one the fan frame 11, an impeller 12 and a coil groups 13.The difference of the utility model second embodiment's radiation fan 1b and first embodiment's radiation fan 1a is: this impeller 12 defines one the 3rd reference level (S3) that has between this first reference level S1 and this second reference level S2 in addition, the 3rd reference level S3 is perpendicular to this axis L, and the 3rd reference level S3 equals the distance of the 3rd reference level S3 to this second reference level S2 to the distance of this first reference level S1; In the present embodiment, the adjoining mutually turning point C of this passage 116 and this diversion division 117 is between this first reference level S1 and the 3rd reference level S3.

By above-mentioned technical characteristics, therefore diversion division 117 height in the axial direction of this second embodiment's radiation fan 1b will, can provide better air-guiding effect greater than diversion division 117 height in the axial direction of this first embodiment's radiation fan 1a; Yet, for guaranteeing that this passage 116 still can provide predetermined pressure accumulation effect after this impeller 12 introducing air-flows enter this passage 116; Therefore, present embodiment defines this turning point C in addition and has one first axial distance d1 to the 3rd reference level S3, the 3rd reference level S3 has one second axial distance d2 to this first reference level S1, this first axial distance d1 is less than or equal to 1/2nd of this second axial distance d2, avoiding this turning point C, and then influence the pressure accumulation effect of this passage 116 excessively near this wind inlet 111.

Please refer to shown in Figure 6, the utility model the 3rd embodiment's radiation fan 1c comprise equally at least one the fan frame 11, an impeller 12 and a coil groups 13.The difference of the utility model the 3rd embodiment's radiation fan 1c and first embodiment's radiation fan 1a is: this impeller 12 also defines one the 3rd reference level S3, the 3rd reference level S3 is perpendicular to this axis L, and the 3rd reference level S3 equals the distance of the 3rd reference level S3 to this second reference level S2 to the distance of this first reference level S1; In the present embodiment, this passage 116 and this diversion division 117 mutual adjoining turning point C are positioned on the 3rd reference level S3.

By above-mentioned technical characteristics, compared to first embodiment's radiation fan 1a, because the turning point C of the 3rd embodiment's radiation fan 1c just is positioned on the 3rd reference level S3; Therefore, after these impeller 12 introducing air-flows enter this passage 116 via this wind inlet 111, the pressure accumulation effect that this passage 116 is provided, and after these impeller 12 air-guidings enter this diversion division 117, the water conservancy diversion effect that this diversion division 117 is provided, both are will be comparatively balanced, avoiding the generation of turbulent flow, and can promote the radiating effect of this radiation fan 1c.

Again, please refer to shown in Fig. 4,5,6, the wind inlet 111 of the utility model radiation fan 1a, 1b, 1c has a maximum caliber D1, and this exhaust outlet 112 also has a maximum caliber D2; Based on above-mentioned turning point C of the present utility model under the technological concept between this first reference level S1 and this second reference level S2, the maximum caliber D2 of this exhaust outlet 112 can be 1.2～1.9 with respect to the ratio of the maximum caliber D1 of this wind inlet 111, be preferably 1.7, whereby, can more effectively promote whole air-out area.

By on learn that the utility model radiation fan 1a, 1b, 1c really can reach the water conservancy diversion effect that is lifted out air port 112, and effectively reduce wind and cut many effects such as noise, to provide allomeric function more perfect cooling fan structure.

Claims

1. radiation fan is characterized in that comprising:

A fan frame has a wind inlet and an exhaust outlet, forms a passage and a diversion division between this wind inlet and this exhaust outlet, and this passage and this diversion division form a turning point in the adjoining mutually position of the inboard perisporium of this fan frame;

An impeller is incorporated into this fan frame inside; And

A coil groups is arranged at this fan frame inside;

Wherein this impeller defines a central axis, the diversion division of this fan frame is the expansion of benchmark radially outward with this central axis, this impeller definition in addition has first reference level and second reference level, this first reference level is by the apical margin of this impeller and perpendicular to this central axis, this second reference level passes through the root edge of this impeller and perpendicular to this central axis, this turning point is between this first reference level and this second reference level.

2. radiation fan as claimed in claim 1, it is characterized in that: this impeller defines one the 3rd reference level in addition, the 3rd reference level is between this first reference level and this second reference level, the 3rd reference level is perpendicular to this central axis, and the 3rd reference level equals the distance of the 3rd reference level to this second reference level to the distance of this first reference level, and this turning point is between this first reference level and the 3rd reference level.

3. radiation fan as claimed in claim 2, it is characterized in that: this turning point to the 3rd reference level has one first axial distance, the 3rd reference level to this first reference level has one second axial distance, and this first axial distance is less than or equal to 1/2nd of this second axial distance.

4. radiation fan as claimed in claim 1, it is characterized in that: this impeller defines one the 3rd reference level in addition, the 3rd reference level is between this first reference level and this second reference level, the 3rd reference level is perpendicular to this central axis, and the 3rd reference level equals the distance of the 3rd reference level to this second reference level to the distance of this first reference level, and this turning point is positioned at the 3rd reference level.

5. as claim 1,2,3 or 4 described radiation fans, it is characterized in that: this wind inlet and this exhaust outlet have maximum caliber respectively, and the maximum caliber of this exhaust outlet is 1.2～1.9 with respect to the ratio of the maximum caliber of this wind inlet.

6. radiation fan as claimed in claim 5 is characterized in that: the maximum caliber of this exhaust outlet is 1.7 with respect to the ratio of the maximum caliber of this wind inlet.