CN105003446A - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
- Publication number
- CN105003446A CN105003446A CN201410182743.5A CN201410182743A CN105003446A CN 105003446 A CN105003446 A CN 105003446A CN 201410182743 A CN201410182743 A CN 201410182743A CN 105003446 A CN105003446 A CN 105003446A
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- CN
- China
- Prior art keywords
- tongue
- centrifugal fan
- sidewall
- impeller
- side wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 241000883990 Flabellum Species 0.000 claims description 11
- 210000002105 tongue Anatomy 0.000 description 41
- 230000002411 adverse Effects 0.000 description 3
- 241000276425 Xiphophorus maculatus Species 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal fan, which comprises a shell and an impeller. The shell comprises a first side wall, a second side wall opposite to the first side wall, an arc-shaped side wall and a tongue part. The arc-shaped side wall is connected to the first side wall and the second side wall. The tongue portion is disposed on the first sidewall and opposite to the arc sidewall. The impeller is arranged between the arc-shaped side wall and the tongue part. The length of the tongue portion from one end of the tongue portion to the other end adjacent to the first side wall is greater than the radius of the impeller. The centrifugal fan can increase the wind pressure of the centrifugal fan by increasing the length of the spiral channel, and can stabilize the flow field of the airflow in the shell, thereby increasing the air output of the centrifugal fan and reducing the backflow of the airflow to the outside of the shell through the axial air inlet.
Description
Technical field
The present invention relates to a kind of fan, particularly a kind of centrifugal fan.
Background technique
Due to the trend of electronic product slimming, limit the thickness of the fan in electronic product.But, along with the thickness of fan reduces, but cause the problem that blast and air output also reduce in the lump.Such as, the height of flabellum reduces, and decreases the throughput that can promote.In addition, the structure of flabellum also weakens thereupon, is difficult to by increasing the length of flabellum to promote more throughput.
Therefore fan must be designed and is improved again, makes it in thickness is more and more thinner when, also provide enough blast and the inside of air output to electronic product to dispel the heat.
Summary of the invention
In order to solve the disappearance of above-mentioned prior art, object of the present invention is for providing a kind of centrifugal fan, and it can provide enough blast and air output in slimming when.
The present invention is the technological scheme solving the employing of its technical problem: a kind of centrifugal fan, comprises housing and impeller.Housing comprises the first side wall, the second sidewall, curved wall and tongue relative to above-mentioned the first side wall.Curved wall connects above-mentioned the first side wall and above-mentioned second sidewall.Tongue is arranged at above-mentioned the first side wall, and relative to above-mentioned curved wall.Impeller is arranged between above-mentioned curved wall and above-mentioned tongue.Above-mentioned tongue is more than or equal to the radius of above-mentioned impeller by one end to the length of the other end being adjacent to above-mentioned the first side wall of above-mentioned tongue.
The invention has the beneficial effects as follows, centrifugal fan of the present invention is by the length increasing helical channel, the blast of centrifugal fan can be increased, and the flow field of the air-flow in housing can be made comparatively stable, so as to increasing the air output of centrifugal fan and reducing air-flow via axial wind inlet adverse current to outside housing.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Fig. 1 is the stereogram of centrifugal fan of the present invention.
Fig. 2 is the exploded view of the centrifugal fan of the first embodiment of the present invention.
Fig. 3 is the plan view of the centrifugal fan of the first embodiment of the present invention.
Fig. 4 is the plan view of the centrifugal fan of the second embodiment of the present invention.
Fig. 5 is the stereogram of the centrifugal fan of the second embodiment of the present invention.
Fig. 6 is the plan view of the centrifugal fan of the third embodiment of the present invention.
Description of reference numerals:
1 centrifugal fan
10 housings
11 base plates
12 the first side walls
13 second sidewalls
14 curved walls
141 arcuate flanks
15 tongues
151 ends
152 arcuate surface
16 cover plates
20 impellers
21 wheel hubs
22 flabellums
30 heat-sink units
31 radiating fins
40 thin heat guide pipes
The axial wind inlet of A1
The radial exhaust outlet of A2
A3 connecting port
A4 bores a hole
Ax1 running shaft
B1 boundary line
C1 helical channel
C2 air-out space
D1 orientation
D2 bearing of trend
E1 first interface
E2 second contact surface
F1 angle
R1 radius
T1 thickness
W1, W2 width
Embodiment
In order to there be understanding clearly to technical characteristics of the present invention, object and effect, now contrast accompanying drawing and the specific embodiment of the present invention is described.
Fig. 1 is the stereogram of centrifugal fan 1 of the present invention.Fig. 2 is the exploded view of the centrifugal fan 1 of the first embodiment of the present invention.Fig. 3 is the plan view of the centrifugal fan 1 of the first embodiment of the present invention.Centrifugal fan 1 can be a slim centrifugal fan 1, and it can be arranged in the thin type electronic devices such as ultrathin notebook PC, panel computer, intelligent mobile phone.
Centrifugal fan 1 comprises housing 10, impeller 20, heat-sink unit 30 and a thin heat guide pipe 40.Housing 10 has an an axial wind inlet A1 and radial exhaust outlet A2, and in the present embodiment, axial wind inlet A1 is positioned at an end face of housing 10, and radial exhaust outlet A2 is positioned at a side of housing 10.In addition, axial wind inlet A1 can be a circle, and radial exhaust outlet A2 can be a thin-and-long.Impeller 20 is arranged in housing 10 and also corresponds to axial wind inlet A1.
Heat-sink unit 30 is arranged at radial exhaust outlet A2.Heat-sink unit 30 comprises multiple radiating fin 31, and it is arranged at radial exhaust outlet A2 along an orientation D1 compartment of terrain.Thin heat guide pipe 40 contacts heat-sink unit 30, and one end of thin heat guide pipe 40 can connect a thermal source (not shown).In another embodiment, centrifugal fan 1 can not comprise heat-sink unit 30 and/or thin heat guide pipe 40.
Impeller 20 can rotate centered by a running shaft Ax1.Running shaft Ax1 is through axial wind inlet A1.When impeller 20 rotates, impeller 20 sucks air in housing 10 from axial wind inlet A1, and is discharged via radial exhaust outlet A2 by the air in housing 10.In the present embodiment, impeller 20 can comprise a wheel hub 21 and multiple flabellum 22.Flabellum 22 radial arrangement is in the sidewall of above-mentioned wheel hub 21.The height of flabellum 22 is about between 2.5mm to 4mm, and the length of flabellum 22 is about between 10mm to 20mm.
The thickness T1 of housing 10 is about between 3mm to 5mm.Housing 10 comprises base plate 11, the first side wall 12,1 second sidewall 13, curved wall 14, tongue 15 and a cover plate 16 (not being drawn in Fig. 3).Base plate 11 can be a platy structure.The first side wall 12, second sidewall 13, curved wall 14 and tongue 15 are arranged at base plate 11, and can extend perpendicular to base plate 11.
The first side wall 12 can be positioned at an edge of base plate 11.Second sidewall 13 can be positioned at another opposite edges of base plate 11, and relative to the first side wall 12.In the present embodiment, the first side wall 12 and the second sidewall 13 can be a linear structure and extend along a bearing of trend D2, but not and limited, wherein bearing of trend D2 is not perpendicular to orientation D1.Curved wall 14 can be positioned at an edge of base plate 11, and the two ends of curved wall 14 are connected to above-mentioned the first side wall 12 and the second sidewall 13.
Tongue 15 is arranged at the first side wall 12, and relative to above-mentioned curved wall 14.Impeller 20 is arranged between curved wall 14 and tongue 15.One length of tongue 15 is about 1 to 4 times of the radius r 1 of impeller 20, and the above-mentioned length of tongue 15 is defined as by one end 151 of tongue 15 to the length of the other end being adjacent to the first side wall 12.One end 151 of tongue 15 is adjacent to impeller 20, and the distance between one end 151 of tongue 15 and impeller 20 can be between 1.5mm to 3mm.In the present embodiment, the above-mentioned length of tongue 15 is greater than 3 times of the radius r 1 of above-mentioned impeller 20.In another embodiment, the above-mentioned length of tongue 15 is greater than the radius r 1 of above-mentioned impeller 20 or 1.5 times of radius r 1 or 2 times.
Cover plate 16 can be a platy structure, and it can be parallel to base plate 11, and spaced with base plate 11.Cover plate 16 is connected to the first side wall 12, second sidewall 13, curved wall 14 and tongue 15.Axial wind inlet A1 can be positioned at cover plate 16, and radial exhaust outlet A2 formed by base plate 11, the first side wall 12, second sidewall 13 and cover plate 16.In other words, axial wind inlet A1 can be parallel to base plate 11, and radial exhaust outlet A2 can wind inlet A1 perpendicular to axial direction.
As shown in Figure 3, the plane definition between one end 151 to running shaft Ax1 of tongue 15 is the first interface E1, and the plane definition between the boundary line B1 of the second sidewall 13 and above-mentioned curved wall 14 to above-mentioned running shaft Ax1 is second contact surface E2.First interface E1 and second contact surface E2 is all defined as plane.There is between first interface E1 and second contact surface E2 the angle F1 corresponding to above-mentioned curved wall 14.In other words, running shaft Ax1 is positioned on the boundary line B1 of the first interface E1 and second contact surface E2.
In some embodiments, angle F1 can be 235 degree to 360 degree, or can be 260 degree to 360 degree.Because the first interface E1 and second contact surface E2 is in the same plane in the present embodiment, therefore angle F1 is 360 degree.
As shown in Figure 2 and Figure 3, a connecting port A3 is formed between one end 151 of tongue 15 and the second sidewall 13.In the present embodiment, above-mentioned connecting port A3 is defined as on the shortest path between one end 151 of tongue 15 and above-mentioned second sidewall 13.In addition, in the present embodiment, connecting port A3 is positioned on second contact surface E2, and connecting port A3 can be parallel to radial exhaust outlet A2, perpendicular to the second sidewall 13 and/or perpendicular to base plate 11.
Between the width W 1 of connecting port A3 is 0.3 times to 1 times of the diameter of impeller 20.In the present embodiment, the width W 1 of connecting port A3 is less than the radius r 1 of impeller 20.In another embodiment, the width W 1 of connecting port A3 can be less than 0.4 times, 0.6 times or 0.8 times of impeller 20 diameter.In addition, the width W 1 of connecting port A3 is about 0.2 to 0.8 times of radial exhaust outlet A2 mono-width W 2.In the present embodiment, the width W 1 of connecting port A3 is about 0.25 times of the width W 2 of radial exhaust outlet A2.In another embodiment, the width W 1 of connecting port A3 is less than 0.4 times or 0.6 times of the width W 2 of radial exhaust outlet A2.
In the present embodiment, above-mentioned tongue 15 has an arcuate surface 152, and arcuate surface 152 forms a helical surface with an arcuate flanks 141 of curved wall 14.Arcuate surface 152 and arcuate flanks 141 all towards impeller 20, and correspond to the sidewall of impeller 20.Helical surface is increased gradually by one end 151 to boundary line B1 of tongue 15 and the distance of impeller 20.Therefore above-mentioned helical surface, form a helical channel C1 between impeller 20 and connecting port A3.In other words, above-mentioned helical channel C1 base plate 11, curved wall 14, between tongue 15 and cover plate 16.
In addition, an air-out space C2 is formed between base plate 11, the first side wall 12, second sidewall 13, tongue 15, cover plate 16, radial exhaust outlet A2 and connecting port A3.Tongue 15 is between helical channel C1 and air-out space C2.The blast of the air-flow produced by impeller 20 increases gradually in helical channel C1, and air-flow is discharged via connecting port A3 and air-out space C2 to radial exhaust outlet A2 afterwards.
By the structure of above-mentioned centrifugal fan 1, the length of helical channel C1 can be increased.Due to the increase of the length of helical channel C1, the blast of the air-flow that centrifugal fan 1 is discharged can further promote.In addition, the increase due to the length of helical channel C1 makes the flow field of the air-flow in housing 10 comparatively stable, and then makes gas comparatively smoothly via in impeller 20 suction casing 10, can increase air output and the blast of centrifugal fan 1.Above-mentioned structure also can decrease in air-flow in impeller 20 via axial wind inlet A1 adverse current to outside housing 10, and then increases air output and the blast of centrifugal fan 1.
Fig. 4 is the plan view of the centrifugal fan 1 of the second embodiment of the present invention, and Fig. 5 is the stereogram of the centrifugal fan 1 of the second embodiment of the present invention, wherein in order to clear expression object, eliminates cover plate 16.Second embodiment and the main difference of the first embodiment are, the length being shorter in length than first embodiment's tongue 15 of the tongue 15 of the second embodiment, and tongue 15 has a perforation A4.
In the present embodiment, the above-mentioned length of tongue 15 is greater than the diameter of impeller 20.First interface E1 is positioned in different planes from second contact surface E2, and the angle F1 of the first interface E1 and second contact surface E2 is about 315 degree.The width W 1 of connecting port A3 is about the radius r 1 of impeller 20.The width W 1 of connecting port A3 is about 0.3 times of a width W 2 of radial exhaust outlet A2.
As shown in Figure 5, bore a hole A4 run through tongue 15 a sidewall and towards impeller 20.Perforation A4 can be communicated in helical channel C1 and air-out space C2.In the present embodiment, perforation A4 can be positioned at one end 151 and the bottom of tongue 15, and the height of perforation A4 is less than the height of tongue 15, but not as limit.In another embodiment, perforation A4 can be positioned at the central authorities of tongue 15, also can be positioned at the top of tongue 15.
By above-mentioned perforation A4, make the fraction flowed out by impeller 20 directly can flow to air-out space C2 through tongue 15 (especially the adjacent one end of tongue 15), to increase the air output of centrifugal fan 1, and perforation A4 is less relative to the size of tongue 15, the air-flow therefore flowed out by perforation A4 also can maintain enough blast.It is noted that above-mentioned perforation A4 also can be arranged in other embodiments of this exposure.
Fig. 6 is the plan view of the centrifugal fan 1 of the third embodiment of the present invention, wherein in order to clear expression object also eliminates cover plate 16.The main difference part of the 3rd embodiment and the first embodiment is.The length being shorter in length than first embodiment's tongue 15 of the tongue 15 of the 3rd embodiment.In the present embodiment, the above-mentioned length of tongue 15 is about the radius r 1 of impeller 20.First interface E1 is positioned in different planes from second contact surface E2, and the angle F1 of the first interface E1 and second contact surface E2 is about 270 degree.The width W 1 of connecting port A3 is about the diameter of impeller 20.The width W 1 of connecting port A3 is about the half of the width W 2 of radial exhaust outlet A2.
In sum, centrifugal fan of the present invention is by the length increasing helical channel, the blast of centrifugal fan can be increased, and the flow field of the air-flow in housing can be made comparatively stable, so as to increasing the air output of centrifugal fan and reducing air-flow via axial wind inlet adverse current to outside housing.
The foregoing is only the schematic embodiment of the present invention, and be not used to limit scope of the present invention.Any those skilled in the art, the equivalent variations done under the prerequisite not departing from design of the present invention and principle and amendment, all should belong to the scope of protection of the invention.And it should be noted that, each constituent element of the present invention is not limited in above-mentioned overall applicability, the each technical characteristics described in specification of the present invention can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the present invention naturally covers other relevant with this case innovative point and combines and embody rule.
Claims (10)
1. a centrifugal fan, is characterized in that, described centrifugal fan comprises:
Housing, comprising:
The first side wall;
Second sidewall, relative to described the first side wall;
Curved wall, connects described the first side wall and described second sidewall;
Tongue, is arranged at described the first side wall, and relative to described curved wall; And
Described centrifugal fan also comprises impeller, is arranged between described curved wall and described tongue;
Wherein said tongue is more than or equal to the radius of described impeller by one end to the length of the other end being adjacent to described the first side wall of described tongue.
2. centrifugal fan as claimed in claim 1, it is characterized in that, described length is 1 times of the radius of described impeller to 4 times.
3. centrifugal fan as claimed in claim 1, it is characterized in that, described tongue has arcuate surface, and the arcuate flanks of described arcuate surface and described curved wall forms helical surface.
4. centrifugal fan as claimed in claim 1, it is characterized in that, described impeller rotates centered by a running shaft, one end of described tongue is the first interface to the plane between described running shaft, and the plane between the boundary line of described second sidewall and described curved wall to described running shaft is second contact surface, there is between wherein said first interface and described second contact surface the angle corresponding to described curved wall, and described angle is 235 degree to 360 degree.
5. centrifugal fan as claimed in claim 1, it is characterized in that, connecting port is formed between one end of described tongue and described second sidewall, and the width of described connecting port is less than the diameter of described impeller, on the shortest path of wherein said connecting port between one end of described tongue and described second sidewall.
6. centrifugal fan as claimed in claim 1, it is characterized in that, connecting port is formed between one end of described tongue and described second sidewall, described housing has radial exhaust outlet, and the width of described connecting port is less than 0.8 times of the width of described radial exhaust outlet, on the shortest path of wherein said connecting port between one end of described tongue and described second sidewall.
7. centrifugal fan as claimed in claim 6, it is characterized in that, described centrifugal fan also comprises heat-sink unit, and described heat-sink unit is arranged at described radial exhaust outlet.
8. centrifugal fan as claimed in claim 1, it is characterized in that, described impeller comprises:
Wheel hub; And
Multiple flabellum, radial arrangement is in the sidewall of described wheel hub;
The height of wherein said flabellum is between 2.5mm to 4mm, and the length of described flabellum is between 10mm to 20mm, and the thickness of described housing is between 3mm to 5mm.
9. centrifugal fan as claimed in claim 1, it is characterized in that, described tongue has perforation, described perforation run through described tongue sidewall and towards described impeller.
10. centrifugal fan as claimed in claim 9, it is characterized in that, described perforation is positioned at one end of described tongue and the bottom of described tongue.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW103114486A TW201540961A (en) | 2014-04-22 | 2014-04-22 | Centrifugal fan |
| TW103114486 | 2014-04-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105003446A true CN105003446A (en) | 2015-10-28 |
Family
ID=54376259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410182743.5A Pending CN105003446A (en) | 2014-04-22 | 2014-04-30 | Centrifugal fan |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105003446A (en) |
| TW (1) | TW201540961A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110858742A (en) * | 2018-08-24 | 2020-03-03 | 日本电产株式会社 | Blower device and air conditioner for automobile |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63289295A (en) * | 1987-05-21 | 1988-11-25 | Matsushita Electric Ind Co Ltd | Blower |
| CN2343395Y (en) * | 1998-03-09 | 1999-10-13 | 李明烈 | Multi-wing type blade centrifugal fan |
| TW201329351A (en) * | 2012-01-04 | 2013-07-16 | Forcecon Technology Co Ltd | Slim cross-flow fan with wind booster effect |
| CN103696987A (en) * | 2012-09-27 | 2014-04-02 | 台达电子工业股份有限公司 | Fan and pressurized fan blade group |
-
2014
- 2014-04-22 TW TW103114486A patent/TW201540961A/en unknown
- 2014-04-30 CN CN201410182743.5A patent/CN105003446A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63289295A (en) * | 1987-05-21 | 1988-11-25 | Matsushita Electric Ind Co Ltd | Blower |
| CN2343395Y (en) * | 1998-03-09 | 1999-10-13 | 李明烈 | Multi-wing type blade centrifugal fan |
| TW201329351A (en) * | 2012-01-04 | 2013-07-16 | Forcecon Technology Co Ltd | Slim cross-flow fan with wind booster effect |
| CN103696987A (en) * | 2012-09-27 | 2014-04-02 | 台达电子工业股份有限公司 | Fan and pressurized fan blade group |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110858742A (en) * | 2018-08-24 | 2020-03-03 | 日本电产株式会社 | Blower device and air conditioner for automobile |
| CN110858742B (en) * | 2018-08-24 | 2021-12-07 | 日本电产株式会社 | Blower device and air conditioner for automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201540961A (en) | 2015-11-01 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151028 |
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| WD01 | Invention patent application deemed withdrawn after publication |