CN103486085A - Centrifugal fan - Google Patents
Centrifugal fan Download PDFInfo
- Publication number
- CN103486085A CN103486085A CN201210191964.XA CN201210191964A CN103486085A CN 103486085 A CN103486085 A CN 103486085A CN 201210191964 A CN201210191964 A CN 201210191964A CN 103486085 A CN103486085 A CN 103486085A
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- CN
- China
- Prior art keywords
- bulge loop
- flabellum
- impeller
- centrifugal cutter
- cover plate
- 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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Abstract
The invention provides a centrifugal fan, which comprises a fan frame and an impeller accommodated in the fan frame, wherein the fan frame comprises a bottom plate, a cover plate and side plates, the side plates are positioned between the bottom plate and the cover plate, the bottom plate comprises an inner surface facing the impeller and an outer surface opposite to the inner surface, the middle part of the bottom plate is provided with a fixing seat, the impeller is rotationally and fixedly arranged on the fixing seat, the bottom plate is provided with a plurality of first air inlet openings penetrating through the inner surface and the outer surface on the outer periphery of the fixing seat, a first connecting arm is formed between the two adjacent first air inlet openings, and is connected between the fixing seat and the bottom plate, each first air inlet is provided with an arc-shaped outer side edge opposite to the fixing seat, the inner surface of the bottom plate is provided with first convex rings projecting and extending towards the impeller on the outer periphery of the first air inlet openings, the arc-shaped outer side edges of the first air inlet openings are coincident with the inner walls of the first convex rings, chamfered surfaces are formed on the outer surface at the edge of each first air inlet opening, and the chambered surfaces are inclined to face one side of the outer surface and have arc-shaped cross sections.
Description
Technical field
The present invention relates to a kind of fan, relate in particular to a kind of centrifugal cutter to electronic element radiating.
Background technique
Along with developing rapidly of computer industry, it is more and more serious that CPU pursues the derivative heat dissipation problem of high-speedization, multifunction and miniaturization, more outstanding in this electronic equipment narrow and small in inner spaces such as notebook computers.If the heat that the electronic components such as CPU can't be produced distributes timely and effectively, will greatly affect the service behaviour of electronic component, also can shorten the working life of electronic component simultaneously, therefore must be dispelled the heat to electronic component.
At present, industry is often used centrifugal cutter to be dispelled the heat to electronic component, this centrifugal cutter comprises a base plate, a cover plate, connect this base plate and cover plate a volute side plate and be contained in by the impeller in the formed containing space of base plate, cover plate and sidewall, be equipped with the wind inlet over against this impeller on this base plate and cover plate.During this centrifugal cutter work, the high pressure draught that impeller produces overstocks between this impeller and this side plate, and the part high pressure draught is flowed in impeller by the sidewall bounce-back, with the natural airflow that enters impeller, produces mixed flow, not only cause the pressure loss of this centrifugal cutter, also can cause noise.
Summary of the invention
In view of this, be necessary to provide in fact a kind of centrifugal cutter that there is greater pressure and there is less noise.
A kind of centrifugal cutter, comprise the fan frame and be contained in the impeller in described fan frame, described fan frame comprises base plate, cover plate and the side plate between described base plate and cover plate, described base plate comprises that the internal surface towards described impeller reaches and described internal surface opposing outer face, the middle part of described base plate is provided with fixed base, described impeller rotatably is fixed on described fixed base, described base plate is in outer some first wind inlets that run through described internal surface and outer surface that are arranged with of described fixed base, form a link arm between adjacent two first wind inlets, described link arm is connected between described fixed base and described base plate, each first wind inlet has the arc outer side relative with described fixed base, the internal surface of described base plate is in outer first bulge loop protruded out to described impeller that is arranged with of described the first wind inlet, the arc outer side of described the first wind inlet overlaps with the inwall of described the first bulge loop, described outer surface forms chamfer surface in the edge of each the first wind inlet, described chamfer surface tilts towards a side at described outer surface place and has the cross section of arc.
The first bulge loop on the base plate of the fan frame of the centrifugal cutter in the present invention can effectively stop high pressure draught to flow into this first wind inlet along the gap between this flabellum and this base plate, not only avoided the pressure loss of this centrifugal cutter, the natural airflow that also can avoid high pressure draught and enter between flabellum produces mixed flow, to reduce the noise of this centrifugal cutter.In addition, the outer surface of this base plate forms a chamfer surface in the edge of each the first wind inlet, and the structure that overlaps with the inwall of this first bulge loop of the arc outer side of each the first wind inlet can make air-flow enter the fan frame flow when inner more smooth and easy, further to reduce noise.
The accompanying drawing explanation
The stereogram that Fig. 1 is the centrifugal cutter in first embodiment of the invention.
The three-dimensional exploded view that Fig. 2 is the centrifugal cutter shown in Fig. 1.
Fig. 3 is that centrifugal cutter in Fig. 1 is in the three-dimensional exploded view of other direction.
Fig. 4 is that centrifugal cutter shown in Fig. 1 is along the sectional view at IV-IV place.
The three-dimensional exploded view that Fig. 5 is the centrifugal cutter in second embodiment of the invention.
The primary component symbol description
| |
100 |
| The fan frame | 10 |
| |
11 |
| |
111，131 |
| |
112、132 |
| |
1121 |
| The |
113 |
| The arc |
1131 |
| The |
114 |
| |
1141 |
| |
12 |
| |
121 |
| The |
122 |
| |
13 |
| The |
133 |
| The |
134 |
| |
1341 |
| |
1342 |
| Containing |
14 |
| Fixed |
15 |
| |
151 |
| |
20 |
| |
21 |
| |
22，22a |
| Top | 221，221a |
| |
2211，2221 |
| Depression | 2211a，2221a |
| Bottom | 222，222a |
| Connecting |
23 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Referring to Fig. 1 to Fig. 4, is a centrifugal cutter 100 of first embodiment of the invention, and this centrifugal cutter 100 comprises that a fan frame 10 and is contained in the impeller 20 in this fan frame 10.
This fan frame 10 comprises a base plate 11, these base plate 11 peripheries extend upward the side plate 12 that forms to be placed on a cover plate 13 on these side plate 12 tops certainly.This base plate 11, side plate 12 and cover plate 13 are encircled into a containing space 14 of accommodating this impeller 20 jointly.
This base plate 11 comprises an internal surface towards this impeller 20 111 and an and dorsad outer surface 112 of this impeller 20 relative with this internal surface 111.This side plate 12 is positioned at a side at these internal surface 111 places.The middle part of this base plate 11 is provided with a fixed base 15, and these base plate 11 middle parts are in outer three first wind inlets 113 that run through this internal surface 111 and outer surface 112 that are arranged with of this fixed base 15.These three the first wind inlets 113 are evenly spaced apart in the periphery of this fixed base 15, form a link arm 151 between adjacent two first wind inlets 113, and this link arm 151 is connected between this fixed base 15 and this base plate 11.Each first wind inlet 113 is does not advise the side shape and has an arc outer side 1131 relative with this fixed base 15, the concyclic heart of arc outer side 1131 of these three the first wind inlets 113.The internal surface 111 of this base plate 11 is in outer first bulge loop 114 that is arranged with the circle protruded out to this impeller 20 of these three the first wind inlets 113, and the arc outer side 1131 of these three the first wind inlets 113 overlaps with the inwall 1141 of this first bulge loop 114.This link arm 151 is connected in the inboard of this first bulge loop 114.This outer surface 112 forms a chamfer surface 1121 in the edge of each the first wind inlet 113, this chamfer surface 1121 tilts towards a side at these outer surface 112 places and has the cross section of an arc.
This side plate 12 is volute and is provided with an exhaust outlet 121 vertical with this first wind inlet 113, and a wherein end of these side plate 12 close these exhaust outlets 121 is to the recessed formation one tongue mouth 122 of this impeller 20.In the present embodiment, this side plate 12 is one-body molded by the mode of plastic ejection moulding with this base plate 11, in the middle of other embodiment, this side plate 12 can also be by other molding mode, as mode one or the moulding respectively of metal stamping or die casting with this base plate 11.
The shape of this cover plate 13 is identical with these base plate 11 shapes.This cover plate 13 comprises the internal surface towards this impeller 20 131 and an outer surface 132 relative with this internal surface 131 equally.The middle part of this cover plate 13 offers one second wind inlet 133 that runs through this internal surface 131 and outer surface 132 over against this impeller 20, in the edge of this second wind inlet 133, the inboard to this fan frame 10 twists this cover plate 13, thereby forms the second bulge loop 134 of an annular towards this impeller 20 on the internal surface 131 of this cover plate 13.The cross section of this second bulge loop 134 is curved, and it comprises the madial wall 1342 that an outer side wall towards this side plate 12 1341 reaches towards this second wind inlet 133.The cross section of this outer side wall 1341 and madial wall 1342 all curved with respectively with internal surface 131 and outer surface 132 smooth connections of this cover plate 13.In the present embodiment, this cover plate 13 is by the mode moulding of plastic ejection moulding, and in the middle of other embodiment, this cover plate 13 can also be by the mode moulding of metal stamping or die casting.
This impeller 20 rotatably is fixed on fixed base 15.This impeller 20 comprises that a wheel hub 21 reaches from the outward extending some flabellums 22 of the periphery of this wheel hub 21.Each flabellum 22 comprises the top relative with this cover plate 13 221 and the bottom 222 relative with this base plate 11.This top 221 flushes towards the end of this flabellum 22 with the second bulge loop 134 on this cover plate 13.The top 221 of each flabellum 22 is provided with a short slot 2211 over against this second bulge loop 134.This bottom 222 flushes towards the end of this flabellum 22 with the first bulge loop 114 on this base plate 11.The bottom 222 of each flabellum 22 is provided with a short slot 2221 over against this first bulge loop 114.This impeller 20 also comprises the connecting ring 23 of an annular, and this connecting ring 23 is around this wheel hub 21 and connect the free powder end on the top 221 of each flabellum 22.This connecting ring 23 is between this second bulge loop 134 and this side plate 12, and the short slot 2211 on each flabellum 22 top 221 is between this wheel hub 21 and this connecting ring 23, and the short slot 2221 of each flabellum 22 bottom 222 is over against the short slot 2211 on this top 221.
During this fan 100 work, the high pressure draught that this impeller 20 produces, a part flows to this exhaust outlet 121 along this side plate 12 under centrifugal action, another part is fanned first of frame 10 to this under the driving of pressure difference, the second wind inlet 113, 133 flow, yet, owing on the base plate 11 of this fan frame 10 and cover plate 13, being respectively equipped with the first bulge loop 114 and the second bulge loop 134 protruded out to this flabellum 22, therefore, can effectively stop high pressure draught to flow into this first wind inlet 113 and the second wind inlet 133 along the gap between this flabellum 22 and this base plate 11 and cover plate 13, not only avoided the pressure loss of this centrifugal cutter 100, the natural airflow generation mixed flow that also can avoid high pressure draught and enter 22 of flabellums, to reduce the noise of this centrifugal cutter 100.The connecting ring 23 of this impeller 20, between the side plate 12 of this second bulge loop 134 and this fan frame 10, can further stop high pressure draught along between the free terminal that axially enters flabellum 22 of impeller 20.
In above-mentioned centrifugal cutter 100, the outer surface 112 of this base plate 11 forms a chamfer surface 1121 in the edge of each the first wind inlet 113, and the arc outer side 1131 of each the first wind inlet 113 overlaps with the inwall 1141 of this first bulge loop 114, while entering fan frame 10 inside from the edge of this first wind inlet 113 when air-flow, this structure can weaken the vortex phenomenon that the edge of this first wind inlet 113 causes due to airflow breakaway, thereby it is more smooth and easy while making air-flow enter fan frame 10 inside, to flow, and to reduce wind, cuts sound.In like manner, the cross section of the second bulge loop 134 on cover plate 13 is curved, can reduce the wind at these the second wind inlet 133 places and cut sound.In addition, in above-mentioned centrifugal cutter, this first bulge loop 114 and the second bulge loop 134 flush with the 222Ji top, bottom 221 of this flabellum 22 respectively towards the end of this impeller 20, short slot 2211,2221 on each flabellum of this impeller 20 provides certain motion and deformation space for the second bulge loop 134 and the first bulge loop 114, can prevent these centrifugal cutter 100 strenuous exercises and the scraping of the first bulge loop 114 of causing and the second bulge loop 134 and impeller 20.
Figure 5 shows that the centrifugal cutter 100a of second embodiment of the invention, this centrifugal cutter 100a has the shape and structure similar to the first centrifugal cutter 100, difference is: the free terminal of each flabellum 22a of the impeller 20a of centrifugal cutter 100a is greater than the height of other parts of this flabellum 22a along the axial height of this impeller 20a, thereby respectively forms a depression 2211a, 2221a in top 221a and the bottom 222a of this flabellum 22a.2211a is between this connecting ring 23 and this wheel hub 21 for this depression.The second bulge loop 134 on the cover plate 13 of this centrifugal cutter 100a is over against the depression 2211a of the top 221a of this flabellum 22a, and the first bulge loop 114 on the base plate of this centrifugal cutter 100a is over against the depression 2221a of the bottom 222a of this flabellum 22a.This depression 2211a, 2221a provide larger motion and deformation space for this second bulge loop 134 and the first bulge loop 114.
Be understandable that, for the person of ordinary skill of the art, can make various corresponding changes in its minute and distortion by technical conceive according to the present invention, and all these change and distortion all should belong to the protection domain of the claims in the present invention.
Claims (10)
1. a centrifugal cutter, comprise the fan frame and be contained in the impeller in described fan frame, described fan frame comprises base plate, cover plate and the side plate between described base plate and cover plate, described base plate comprises that the internal surface towards described impeller reaches and described internal surface opposing outer face, the middle part of described base plate is provided with fixed base, described impeller rotatably is fixed on described fixed base, described base plate is in outer some first wind inlets that run through described internal surface and outer surface that are arranged with of described fixed base, form a link arm between adjacent two first wind inlets, described link arm is connected between described fixed base and described base plate, it is characterized in that: each first wind inlet has the arc outer side relative with described fixed base, the internal surface of described base plate is in outer first bulge loop protruded out to described impeller that is arranged with of described the first wind inlet, the arc outer side of described the first wind inlet overlaps with the inwall of described the first bulge loop, described outer surface forms chamfer surface in the edge of each the first wind inlet, described chamfer surface tilts towards a side at described outer surface place and has the cross section of arc.
2. centrifugal cutter as claimed in claim 1, it is characterized in that: described impeller comprises that wheel hub reaches from the outward extending flabellum of wheel hub, each flabellum comprises the top relative with described cover plate and the relative bottom of described base plate, and described bottom flushes towards the end of described flabellum with described the first bulge loop.
3. centrifugal cutter as claimed in claim 2, it is characterized in that: the bottom of described flabellum is provided with over against the short slot of described the first bulge loop.
4. centrifugal cutter as claimed in claim 2, it is characterized in that: the free terminal of each flabellum along described impeller shaft to height be greater than the height of described other parts of flabellum, thereby form a depression in the bottom of described flabellum, described the first bulge loop is over against described depression.
5. centrifugal cutter as claimed in claim 2, it is characterized in that: described cover plate comprises towards the internal surface of described impeller and the outer surface relative with described internal surface, described cover plate offers the second wind inlet that runs through described internal surface and outer surface over against described impeller, in the edge of described the second wind inlet, the inboard to described fan frame twists described cover plate, thereby form the second bulge loop towards described impeller on the internal surface of described cover plate, the top of described flabellum flushes towards the end of described flabellum with described the second bulge loop.
6. centrifugal cutter as claimed in claim 5, it is characterized in that: the cross section of described the second bulge loop is curved, described the second bulge loop comprises that the outer side wall towards described side plate reaches the madial wall towards described the second wind inlet, and the outer side wall of described the second bulge loop and the cross section of madial wall are all curved to be connected with internal surface and the outer surface smoother of described cover plate respectively.
7. centrifugal cutter as claimed in claim 5, it is characterized in that: the top of described flabellum is provided with over against the groove of described the second bulge loop.
8. centrifugal cutter as claimed in claim 5, it is characterized in that: the free terminal of each flabellum along described impeller shaft to height be greater than the height of described other parts of flabellum, thereby form a depression in the top of described flabellum, described the second bulge loop is over against described depression.
9. centrifugal cutter as claimed in claim 5, it is characterized in that: described impeller also comprises a connecting ring, described connecting ring is around described wheel hub and connect the free powder end on the top of each flabellum, and described connecting ring is between described the second bulge loop and described side plate.
10. centrifugal cutter as claimed in claim 1, it is characterized in that: the concyclic heart of arc outer side of described the first wind inlet, described the first bulge loop is rounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210191964.XA CN103486085A (en) | 2012-06-12 | 2012-06-12 | Centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210191964.XA CN103486085A (en) | 2012-06-12 | 2012-06-12 | Centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103486085A true CN103486085A (en) | 2014-01-01 |
Family
ID=49826582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210191964.XA Pending CN103486085A (en) | 2012-06-12 | 2012-06-12 | Centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103486085A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015149591A1 (en) * | 2014-04-01 | 2015-10-08 | 朱其厚 | Active air feeding mask |
| CN105443445A (en) * | 2016-01-07 | 2016-03-30 | 宁波宏都电器有限公司 | Mixed-flow type axial-flow fan assembly |
| CN111434927A (en) * | 2019-01-11 | 2020-07-21 | 华硕电脑股份有限公司 | Centrifugal fan and impeller thereof |
| EP3592985B1 (en) * | 2017-09-21 | 2024-01-10 | Ebm-Papst St. Georgen GmbH & CO. KG | Parts kit and method for producing a radial blower |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2755321Y (en) * | 2004-11-22 | 2006-02-01 | 广达电脑股份有限公司 | Centrifugal fan |
| TW200928109A (en) * | 2007-12-21 | 2009-07-01 | Foxconn Tech Co Ltd | Centrifugal fan |
| TWI324225B (en) * | 2005-04-01 | 2010-05-01 | Japan Servo | Centrifugal fan |
| CN102465891A (en) * | 2010-11-02 | 2012-05-23 | 广东松下环境系统有限公司 | Ventilator |
-
2012
- 2012-06-12 CN CN201210191964.XA patent/CN103486085A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2755321Y (en) * | 2004-11-22 | 2006-02-01 | 广达电脑股份有限公司 | Centrifugal fan |
| TWI324225B (en) * | 2005-04-01 | 2010-05-01 | Japan Servo | Centrifugal fan |
| TW200928109A (en) * | 2007-12-21 | 2009-07-01 | Foxconn Tech Co Ltd | Centrifugal fan |
| CN102465891A (en) * | 2010-11-02 | 2012-05-23 | 广东松下环境系统有限公司 | Ventilator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015149591A1 (en) * | 2014-04-01 | 2015-10-08 | 朱其厚 | Active air feeding mask |
| CN105443445A (en) * | 2016-01-07 | 2016-03-30 | 宁波宏都电器有限公司 | Mixed-flow type axial-flow fan assembly |
| EP3592985B1 (en) * | 2017-09-21 | 2024-01-10 | Ebm-Papst St. Georgen GmbH & CO. KG | Parts kit and method for producing a radial blower |
| CN111434927A (en) * | 2019-01-11 | 2020-07-21 | 华硕电脑股份有限公司 | Centrifugal fan and impeller thereof |
| CN111434927B (en) * | 2019-01-11 | 2021-07-09 | 华硕电脑股份有限公司 | Centrifugal fan and impeller thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140101 |