CN101165356A - Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device - Google Patents
Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device Download PDFInfo
- Publication number
- CN101165356A CN101165356A CNA2006100632204A CN200610063220A CN101165356A CN 101165356 A CN101165356 A CN 101165356A CN A2006100632204 A CNA2006100632204 A CN A2006100632204A CN 200610063220 A CN200610063220 A CN 200610063220A CN 101165356 A CN101165356 A CN 101165356A
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- China
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- intake grill
- centrifugal cutter
- casing
- top cover
- sink
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Abstract
This invention is a centrifugal fan. It includes a top cover, a bottom cover and a lateral wall connecting the top cover and bottom cover. The lateral wall has an air outlet opening. The top cover is arranged with first air inlet opening. The bottom cover is arranged with second air inlet opening. The aperture of the first air inlet opening is larger than that of the second air inlet opening. The second air inlet opening retracts inwards corresponding to the first air outlet opening at the side of air outlet opening. Thus, it can inhibit the air escaping phenomenon, which means the air coming from the first air inlet opening runs away through the second air inlet opening. It can increase the air flow rate of the centrifugal fan without increasing the cost. This invention also provides a heat dissipating device using this centrifugal fan and an electronic device using this heat dissipating device.
Description
Technical field
The present invention relates to a kind of centrifugal cutter, particularly relates to a kind of centrifugal cutter to the heat-generating electronic elements heat radiation, the invention still further relates to a kind of electronic equipment that has the sink of this centrifugal cutter and use this sink.
Background technique
Along with improving constantly of central processing unit (CPU) electronic component power such as (CPU), heat dissipation problem more and more is subject to people's attention, and is all the more so in notebook computer.The heat that is produced in order to take away system efficiently in limited space, industry mainly adopts by the mode of radiating fin group, heat pipe and centrifugal cutter combination and dispels the heat at present.The heat conduction path of this mode is: the heat that CPU produces reaches the radiating fin group through heat pipe, and the air-flow that is produced by the centrifugal cutter heat that will reach the radiating fin group is taken away again, so centrifugal cutter has very large influence to the heat dispersion of system.
In order in limited space, to improve the heat dispersion of sink better, blade parameter, upper and lower covers size, housing curve shape, motors designs parameter that is primarily aimed at the centrifugal cutter of sink at present etc. is optimized design, in the hope of reaching rational combination, so how each variable of centrifugal cutter designs and also just seems particularly important.
In the centrifugal cutter design, the air quantity of fan is a very important parameters, yet airflow pressure and noise are again conflicting parameters relationships in the reality, therefore, fan is optimized the very difficult of design, can under identical condition, make the air quantity of fan realize promoting, even several percentage points, be successful optimal design to fan.The optimal design mode of at present numerous parameters of fan being carried out such as blade parameter, fan form structure parameter, motors designs parameter etc. all needs to promote greatly manufacture cost, causes the low in economic efficiency of optimal design.
Summary of the invention
In view of this, be necessary to provide a kind of centrifugal cutter that on the basis that does not increase cost, increases air mass flow, also be necessary to provide simultaneously a kind of electronic equipment that promotes the sink of heat dispersion and use this sink.
A kind of centrifugal cutter, comprise a top cover, a bottom and connect a sidewall between this top cover and the bottom, this sidewall is provided with an exhaust outlet, this top cover is provided with first intake grill, this bottom is provided with second intake grill, the aperture of first intake grill of this centrifugal cutter is greater than the aperture of second intake grill, and this second intake grill is in contracting near in relative first intake grill of a side of exhaust outlet.
A kind of sink, comprise a radiating fin group and be used to produce cooling blast and blow to a centrifugal cutter of this radiating fin group, this centrifugal cutter comprises a top cover, a bottom and connects a sidewall between this top cover and the bottom, this sidewall is provided with an exhaust outlet, this top cover is provided with first intake grill, this bottom is provided with second intake grill, the aperture of first intake grill of this centrifugal cutter is greater than the aperture of second intake grill, and this second intake grill is in contracting near in relative first intake grill of a side of exhaust outlet.
A kind of electronic equipment, comprise a casing and be located at the interior sink of this casing, this casing comprises a top board and a base plate relative with lid top panel, this sink comprises a centrifugal cutter and is located at a radiating fin group at the exhaust outlet place of this centrifugal cutter, this centrifugal cutter has a top cover and a bottom relative with this top cover, the top cover of this centrifugal cutter is provided with first intake grill, this bottom is provided with second intake grill, greater than the bottom of this centrifugal cutter distance apart from the base plate of this casing, this second intake grill is in contracting near in relative first intake grill of a side of exhaust outlet apart from the distance of the top board of this casing for the top cover of this centrifugal cutter.
Compared with prior art, second intake grill of above-mentioned centrifugal cutter is in contracting near in relative first intake grill of a side of exhaust outlet, can make the air-flow that enters in the centrifugal cutter from first intake grill have part to be suppressed effectively via the ease wind phenomenon of second intake grill escape, on the basis of the cost that does not increase centrifugal cutter, increase the air mass flow of centrifugal cutter, thereby promote heat dispersion.
Description of drawings
Fig. 1 is the three-dimensional exploded view of sink one preferred embodiment of the present invention.
Fig. 2 is the three-dimensional assembly diagram of sink shown in Figure 1.
Fig. 3 is the projection drawing of the upper and lower intake grill of centrifugal cutter shown in Figure 1 along the axial direction of rotor.
Sectional view when Fig. 4 places in the casing for sink shown in Figure 1.
Fig. 5 is the projection drawing of the upper and lower intake grill of centrifugal cutter among another embodiment of sink of the present invention.
Fig. 6 is the sectional view when placing in the casing based on an improved sink.
Embodiment
Present most of sink all adopts the active heat dissipation design of configuration centrifugal cutter, and must satisfy the demand that can install in limited and fixing space.
Figure 6 shows that a kind of sink 30 that is used for heat-generating electronic elements (figure does not show) heat radiation, this sink 30 places in the casing, it is used for being located at the heat-generating electronic elements heat radiation in this casing, wherein, this casing comprises a top board 40a and a base plate 40b relative with this top board 40a, this sink 30 is located between the top board 40a and base plate 40b of this casing, comprises a radiating fin group 31 and a centrifugal cutter 32.This radiating fin group 31 is located at exhaust outlet 321 places of this centrifugal cutter 32; and with the heat-generating electronic elements hot connecting; this centrifugal cutter 32 comprises a bottom 325; one sidewall 322; one top cover 323 and one is arranged at the rotor 324 between bottom 325 and the top cover 323; this bottom 325 is provided with intake grill 326; this top cover 323 is provided with concentric with this time intake grill 326 and size shape is all identical on one intake grill 328; because sink 30 generally is to be fixed on the base plate 40b of casing; therefore can make usually intake grill 328 on this apart from the distance of the top board 40a of this casing greater than the distance of this time intake grill 326 apart from the base plate 40b of this casing; when rotor 324 entrys into service of this centrifugal cutter 22; cool air on every side is respectively by last; following intake grill 328; 326 enter in the centrifugal cutter 32; through pressurizeing after blow to radiating fin group 31 by exhaust outlet 321; so that radiating fin group 31 is taken away by the heat that heat-generating electronic elements absorbs, thereby reach the purpose of heat radiation.
The claimant utilizes CFD (Computational Fluid Dynamics, computational fluid mechanics) software is constantly tested above-mentioned sink 30 and the flow field simulation discovery, since last intake grill 328 apart from the distance of the top board 40a of casing greater than intake grill 326 down apart from the distance of the base plate 40b of casing, cause entering bigger with respect to intake grill 326 down of air mass flow in the centrifugal cutter 32 from last intake grill 328, air-flow is when being blown to radiating fin group 31, the trend of walking downwards is obvious, cause the generation of excessive wind phenomenon (shown in arrow F in the dotted line circle among Fig. 6) easily, make the part air mass flow that enters centrifugal cutter 32 via intake grill 326 escapes down, thereby the air mass flow of centrifugal cutter 32 is descended, reduced the heat dispersion of sink 30, simultaneously, the air that should escape downwards also clashes into mutually with the air that enters from following intake grill 326, causes energy loss and produces bigger system noise.Therefore, the claimant actively researchs and analyses this problem, to attempt that the optimal design and the rational deployment of centrifugal cutter 32 in casing reached better heat radiating effect, is that birth of the present invention is arranged.
Fig. 1 is to a preferred embodiment that Figure 2 shows that sink 10 of the present invention, dispel the heat in the casing 20 (as shown in Figure 4) of this sink 10 applicable to a notebook computer, be appreciated that ground, this sink 10 also can place in other electronic equipments with enclosing housing and dispel the heat, in the housing as desktop computer, projector etc.This sink 10 comprises a radiating fin group 12 and a centrifugal cutter 14, heat-generating electronic elements in this radiating fin group 12 and the casing 20 (figure does not show) hot connecting, to absorb the heat that this heat-generating electronic elements produces, this centrifugal cutter 14 provides the air-flow with elevated pressures that blows to this radiating fin group 12, is dispersed in the ambient air with the heat that this radiating fin group 12 is absorbed.
This centrifugal cutter 14 is used for this radiating fin group 12 heat radiation, and it comprises that a housing 141, is located at the rotor 143 that top cover 142 and on this housing 141 has some flabellums 144.This top cover 142 surrounds with this housing 141 and forms a containing space, and this rotor 143 is arranged in this containing space.This top cover 142 is provided with a circular hole with the last intake grill 146 as this centrifugal cutter 14.This housing 141 comprises the sidewall 148 of a bottom 147 and a volute, and this sidewall 148 is vertical with this bottom 147, which is provided with the exhaust outlet 149 of an arc.This radiating fin group 12 is arranged at exhaust outlet 149 places of this centrifugal cutter 14, this radiating fin group 12 is roughly curved, it comprises some radiating fins 121, form an air-flow path 125 between every two adjacent radiating fins 121, this radiating fin group 12 has a upper-end surface 129 and a lower end surface 130, wherein this upper-end surface 129 is positioned at same plane with the upper surface of the top cover 142 of centrifugal cutter 14, and this lower end surface 130 is positioned at same plane with the lower surface of the bottom 147 of centrifugal cutter 14.
The bottom 147 of this centrifugal cutter 14 is perpendicular to the axis A of the rotor 143 of centrifugal cutter 14, also be provided with a circular hole on this bottom 147 with following intake grill 150 as this centrifugal cutter 14, the aperture of this time intake grill 150 is less than the aperture of intake grill on this 146, be provided with the supporting portion 151 of a circle and the connection rib 153 that this supporting portion 151 is connected with this bottom 147 in the middle of this time intake grill 150, this supporting portion 151 is concentric with this time intake grill 150, this rotor 143 is arranged on this supporting portion 151, and this rotor 143 and the 150 concentric settings of this time intake grill, promptly the center O of this time intake grill 150 is positioned on the axis A of this rotor 143.
In the present embodiment, center M of intake grill 146 is partial to the left side of this rotor 143 axis A on this, a side of the exhaust outlet 149 of promptly more close this centrifugal cutter 14.Figure 3 shows that above-mentioned centrifugal cutter 14 on, following intake grill 146,150 projection drawings along the axis A direction of rotor 143, as can be seen from the figure, should go up intake grill 146 and more be partial to exhaust outlet 149, this time intake grill 150 is in contracting in then with respect to last intake grill 146 near a side of exhaust outlet, and circle was with should to go up intake grill 146 formed cylindricals tangent in the right side of axis A in this time intake grill 150 was formed, make this time intake grill 150 in the side near exhaust outlet 149 go up relatively the distance L that contracts in the intake grill 146 for be somebody's turn to do upward intake grill 146 formed cylindricals and this time intake grill 150 formed in diameter of a circle poor.
Figure 4 shows that when sink 10 places in the casing 20 and along the sectional view of IV-IV line shown in Figure 2, this casing 20 comprises a top board 21 and a base plate 22, this sink 10 is between this top board 21 and base plate 22, the top cover 142 of this centrifugal cutter is between the bottom 147 of the top board 21 of this casing 20 and this centrifugal cutter 14, and the bottom 147 of this centrifugal cutter 14 is between the top cover 142 of the base plate 22 of this casing 20 and this centrifugal cutter 14.Form gap (top gap) 25 between the top cover 142 of this centrifugal cutter 14 and the top board 21 of casing 20, form gap (bottom gap) 26 between the bottom 147 of this centrifugal cutter 14 and the base plate 22 of casing 20, on being somebody's turn to do, following gap 25,26 can be respectively as air enter centrifugal cutter 14 on, following intake grill 146,150 air flow channel, should go up the height h of the height H in gap 25 greater than this time gap 26, therefore, flow through gap 25 on this and enter air mass flow in the centrifugal cutter 14 by last intake grill 146, the air mass flow of flowing through this time gap 26 and being entered in the centrifugal cutter 14 by following intake grill 150 is big, air-flow has the trend walked downwards, but since this time intake grill 150 on the projecting direction of rotor 143 axis A with respect on contract in the intake grill 146, therefore the air-flow that overflows from following intake grill 150 originally then can be stopped by the bottom 147 of centrifugal cutter 14, under the guiding of this bottom 147, enter the air-flow path 125 of radiating fin group 12 along the exhaust outlet 149 of centrifugal cutter 14, shown in dotted line circle among Fig. 4, thereby the ease wind phenomenon of centrifugal cutter 14 is suppressed effectively, on the basis of the cost that does not increase centrifugal cutter 14, can increase the air flow rate of centrifugal cutter 14, promote the heat dispersion of sink 10.
Certainly, make centrifugal cutter 14 on the aperture of intake grill 146 greater than its following aperture of intake grill 150, and following intake grill 150 is gone up under the situation that contracts in the intake grill 146 on projecting direction relatively, the above-mentioned center M that goes up intake grill 146 also can be provided with the center O of following intake grill 150 is concentric, shown in Fig. 5 another embodiment of the present invention, this embodiment all can play the effect that prevents that well air-flow from overflowing because the center M of last intake grill 146 is provided with the center O of following intake grill 150 is concentric in the whole circumference direction of descending intake grill 150.In the present embodiment, this time intake grill 150 in go up relatively near a side of exhaust outlet the distance L that contracts in the intake grill 146 for this on intake grill 146 formed cylindricals and this time intake grill 150 formed in half of difference of diameter of a circle.
In two above embodiments, whole intake grill 150 down all is positioned at the drop shadow spread of intake grill 146 on the projecting direction of rotor 143 axis A, help upper and lower intake grill 146,150 like this and align mutually, reduce crosstalking mutually between the air-flow that enters respectively from upper and lower intake grill 146,150.
Table l tests the data that draw for sink 1O in extremely embodiment illustrated in fig. 4 according to Fig. 1 of the present invention, by experiment as can be known, the rotating speed of centrifugal cutter 14 be 3600rpm, on the height H in gap 25 be 3.6mm, the height h in gap 26 is under the situation of 2.5mm down, this sink 1O compares with sink 10 shown in Figure 6, O.51cfm air quantity Q has promoted (Cubic Feet Per Minute, cubic feet/per minute).
Table l
Claims (12)
1. centrifugal cutter, comprise a top cover, a bottom and connect a sidewall between this top cover and the bottom, this sidewall is provided with an exhaust outlet, this top cover is provided with first intake grill, this bottom is provided with second intake grill, it is characterized in that: the aperture of first intake grill of this centrifugal cutter is greater than the aperture of second intake grill, and this second intake grill is in contracting near in relative first intake grill of a side of exhaust outlet.
2. centrifugal cutter as claimed in claim 1 is characterized in that: described first intake grill and second intake grill are eccentric to be provided with, and whole second intake grill all is positioned at the drop shadow spread of first intake grill on the axis projection direction of centrifugal cutter.
3. centrifugal cutter as claimed in claim 2 is characterized in that: circle was tangent in a side of the axis of centrifugal cutter with the formed cylindrical of second intake grill in described first intake grill was formed.
4. centrifugal cutter as claimed in claim 1 is characterized in that: described first intake grill is provided with second intake grill is concentric.
5. sink comprises a radiating fin group and is used to produce cooling blast and blows to a centrifugal cutter of this radiating fin group, it is characterized in that: this centrifugal cutter is each described centrifugal cutter in the claim 1 to 4.
6. sink as claimed in claim 5 is characterized in that: the exhaust outlet camber of this centrifugal cutter, this radiating fin group is arranged in the arc that is complementary with exhaust outlet.
7. electronic equipment, comprise a casing and be located at the interior sink of this casing, this casing comprises a top board and a base plate relative with lid top panel, this sink comprises a centrifugal cutter and is located at a radiating fin group at the exhaust outlet place of this centrifugal cutter, this centrifugal cutter has a top cover and a bottom relative with this top cover, the top cover of this centrifugal cutter is provided with first intake grill, this bottom is provided with second intake grill, it is characterized in that: greater than the bottom of this centrifugal cutter distance apart from the base plate of this casing, this second intake grill is in contracting near in relative first intake grill of a side of exhaust outlet apart from the distance of the top board of this casing for the top cover of this centrifugal cutter.
8. electronic equipment as claimed in claim 7, it is characterized in that: this sink is located between the top board and base plate of this casing, the top cover of this centrifugal cutter is between the bottom of the top board of this casing and this centrifugal cutter, and the bottom of this centrifugal cutter is between the top cover of the base plate of this casing and this centrifugal cutter.
9. electronic equipment as claimed in claim 8 is characterized in that: the aperture of first intake grill of this centrifugal cutter is greater than the aperture of second intake grill.
10. electronic equipment as claimed in claim 9 is characterized in that: first intake grill of this centrifugal cutter and this second intake grill are eccentric to be provided with, and whole second intake grill all is positioned at the drop shadow spread of first intake grill on the axis projection direction of centrifugal cutter.
11. electronic equipment as claimed in claim 9 is characterized in that: first intake grill of this centrifugal cutter is provided with second intake grill is concentric.
12. electronic equipment as claimed in claim 7 is characterized in that: this casing is the casing of a notebook computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610063220A CN101165356B (en) | 2006-10-20 | 2006-10-20 | Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610063220A CN101165356B (en) | 2006-10-20 | 2006-10-20 | Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101165356A true CN101165356A (en) | 2008-04-23 |
| CN101165356B CN101165356B (en) | 2010-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610063220A Expired - Fee Related CN101165356B (en) | 2006-10-20 | 2006-10-20 | Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device |
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| Country | Link |
|---|---|
| CN (1) | CN101165356B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106267290A (en) * | 2016-09-14 | 2017-01-04 | 广州凡而芳香日用品有限公司 | A kind of automatic fragrance delivering machine |
| CN106877211A (en) * | 2010-11-09 | 2017-06-20 | 服务器技术股份有限公司 | Equipment rack distribution system |
| CN110056514A (en) * | 2018-01-19 | 2019-07-26 | 日本电产株式会社 | Centrifugal fan and cooling device comprising the centrifugal fan |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2445118Y (en) * | 2000-10-09 | 2001-08-29 | 元山科技工业股份有限公司 | Heat-sinking fan |
| CN2471982Y (en) * | 2001-02-02 | 2002-01-16 | 元山科技工业股份有限公司 | Composite radiating hot fun |
| CN2544123Y (en) * | 2002-04-27 | 2003-04-09 | 李国良 | bidirectional inlet fan |
-
2006
- 2006-10-20 CN CN200610063220A patent/CN101165356B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877211A (en) * | 2010-11-09 | 2017-06-20 | 服务器技术股份有限公司 | Equipment rack distribution system |
| CN106877211B (en) * | 2010-11-09 | 2019-06-04 | 服务器技术股份有限公司 | Equipment rack distribution system |
| CN106267290A (en) * | 2016-09-14 | 2017-01-04 | 广州凡而芳香日用品有限公司 | A kind of automatic fragrance delivering machine |
| CN110056514A (en) * | 2018-01-19 | 2019-07-26 | 日本电产株式会社 | Centrifugal fan and cooling device comprising the centrifugal fan |
| CN110056514B (en) * | 2018-01-19 | 2020-10-13 | 日本电产株式会社 | Centrifugal fan and cooling device comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101165356B (en) | 2010-05-26 |
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Granted publication date: 20100526 Termination date: 20151020 |
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