CN100529413C - 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 PDF

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Publication number
CN100529413C
CN100529413C CNB2006101568953A CN200610156895A CN100529413C CN 100529413 C CN100529413 C CN 100529413C CN B2006101568953 A CNB2006101568953 A CN B2006101568953A CN 200610156895 A CN200610156895 A CN 200610156895A CN 100529413 C CN100529413 C CN 100529413C
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CN
China
Prior art keywords
centrifugal cutter
base plate
top board
rotor
casing
Prior art date
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CNB2006101568953A
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Chinese (zh)
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CN101187379A (en
Inventor
黄清白
林然
Original Assignee
富准精密工业(深圳)有限公司
鸿准精密工业股份有限公司
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Priority to CNB2006101568953A priority Critical patent/CN100529413C/en
Publication of CN101187379A publication Critical patent/CN101187379A/en
Application granted granted Critical
Publication of CN100529413C publication Critical patent/CN100529413C/en

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Abstract

A centrifugal fan comprises a top board, a base board, a rotor, and a lateral wall which is arranged between the top board and the base board, wherein at least one air outlet is arranged on the lateral wall, a first air inlet is mounted on the top board, and a second air inlet is arranged on the base board. A containing space is formed by the surrounding of the top board, the base board and the lateral wall, and the rotor is arranged in the containing space, wherein an indentation is formed on the range of the base board which is relative to the rotor towards the direction of the rotor. The distance between the indentation area of the base board and a casing is increased when the centrifugal fan is assembled in the casing of an electronic installation, which is beneficial for more air entering into the centrifugal fan through the second air inlet, and effectively increases the total flow of the centrifugal fan under the situation of no increasing costs. The invention further provides a heat dissipating device with the centrifugal fan and an electronic installation which uses the heat dissipating device.

Description

The electronic equipment of sink and centrifugal cutter thereof and this sink of use

Technical field

The present invention relates to a kind of centrifugal cutter, particularly relate to a kind of centrifugal cutter, the invention still further relates to a kind of electronic equipment that has the sink of this centrifugal cutter and use this sink the heat-generating electronic elements heat radiation.

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, 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 centrifugal cutter design, the air quantity of fan is a very important parameters, yet airflow pressure and noise are again a pair of contradictory relations in the reality, and therefore, the difficulty that fan is optimized design is higher.Numerous parameters to fan all need to promote greatly manufacture cost such as the optimal design mode that blade parameter, motors designs parameter etc. carries out at present, cause 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, can increase 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 board, a base plate, a rotor and be located at top board and base plate between a sidewall, this sidewall is provided with at least one exhaust outlet, this top board is provided with one first intake grill, this base plate is provided with one second intake grill, this top board, base plate and sidewall surround and form a containing space, and this rotor is located in this containing space, and wherein this base plate forms a depression towards rotor place direction in the scope of respective rotor.

A kind of sink, comprise a centrifugal cutter and be located at least one fins group of the exhaust outlet of this centrifugal cutter, wherein this centrifugal cutter comprise a top board, a base plate, a rotor and be located at top board and base plate between a sidewall, this sidewall is provided with at least one exhaust outlet, this top board is provided with one first intake grill, this base plate is provided with one second intake grill, this top board, base plate and sidewall surround and form a containing space, this rotor is located in this containing space, and this base plate forms a depression towards rotor place direction in the scope of respective rotor.

A kind of electronic equipment, comprise a casing and be located at the interior sink of this casing, this casing comprises a loam cake and a lower cover relative with this loam cake, this sink comprises a centrifugal cutter and is located at least one fins group at the exhaust outlet place of this centrifugal cutter, this centrifugal cutter has a top board, a base plate relative with this top board and be located at top board and base plate between a rotor, the top board of this centrifugal cutter is provided with first intake grill, the base plate of this centrifugal cutter is provided with second intake grill, wherein greater than the base plate of this centrifugal cutter distance apart from the lower cover of this casing, the base plate of this centrifugal cutter forms a depression towards rotor place direction to the top board of this centrifugal cutter in the scope of respective rotor apart from the distance of the loam cake of this casing.

Compared with prior art, the base plate of above-mentioned centrifugal cutter forms a depression towards rotor place direction in the scope of respective rotor, when this centrifugal cutter is assembled in the casing of electronic equipment, make the distance between the lower cover of the sunk area of base plate and casing increase, helping more air enters in the centrifugal cutter by second intake grill, the total discharge of centrifugal cutter is increased, thereby promote heat dispersion.

Description of drawings

With reference to the accompanying drawings, in conjunction with the embodiments the present invention is further described.

Fig. 1 is the wherein three-dimensional exploded view of a preferred embodiment of sink of the present invention.

Fig. 2 is the three-dimensional assembly diagram of sink shown in Figure 1.

Fig. 3 is the three-dimensional assembly diagram of another angle of sink shown in Figure 1.

Fig. 4 is that sink shown in Figure 1 is located at the sectional view in the casing.

Fig. 5 is based on an improved sink and places the interior sectional view of a casing.

Embodiment

For adapting to portable electron device such as notebook computer etc. towards demand frivolous, short and small development, and, at present the employed sink great majority of its inner heat electronic component are adopted the active heat dissipation design of configuration centrifugal cutter in order to realize the purpose of quick heat radiating.

Figure 5 shows that a kind of portable electron device 5 is as notebook computer etc., this electronic equipment 5 comprises a casing 60 and is located at sinks 50 in this casing 60, and the heat-generating electronic elements (figure does not show) that this sink 50 is used for electronic equipment 5 inside dispels the heat as the central processing unit (CPU) of notebook computer etc.This casing 60 comprises a loam cake 61 and a lower cover 62.This sink 50 is located between this loam cake 61 and the lower cover 62, and it comprises a centrifugal cutter 51 and a fins group 52.This fins group 52 be located at centrifugal cutter 51 exhaust outlet 511 places and with the heat-generating electronic elements hot connecting to absorb the heat that heat-generating electronic elements was produced.This centrifugal cutter 51 comprises a base 512, is located at a cover plate 513 and a rotor 514 on this base 512, and this rotor 514 is located in this base 512, and the air-flow that produces during its running blows to fins group 52 and distributes with the heat with its absorption.Be respectively equipped with on this cover plate 513 and the base 512 on relative one intake grill 515 and once intake grill 516 enter in the centrifugal cutter 51 for extraneous air-flow.The radius that this upper and lower intake grill 515,516 is circular arc and this upper and lower intake grill 515,516 equates.

When sink 50 is assembled in the casing 60 of electronic equipment 5, because the thickness of casing 60 is limited, so just make that the spacing h2 between the lower cover 62 of the following intake grill 516 of spacing h1 between the loam cake 61 of the last intake grill 515 of centrifugal cutter 51 and casing 60 and centrifugal cutter 51 and casing 60 is all less, and spacing h1 can be greater than spacing h2 usually.The inventor utilizes CFD (Computational Fluid Dynamics, computational fluid mechanics) software places the operative scenario of electronic equipment 5 constantly to test and flow field simulation analysis discovery to above-mentioned sink 50, and the air quantity that enters centrifugal cutter 51 from last intake grill 515 will be much larger than the air quantity that enters centrifugal cutter 51 from following intake grill 516.As being 3.6mm at spacing h1, when spacing h2 was 2.5mm, the flow that calculates intake grill was 2.59cfm, and the flow of following intake grill is 1.32cfm, and the total discharge of centrifugal cutter is 3.91cfm.The inventor discovers that the intake grill design of centrifugal cutter 51 and intake grill have very big relation apart from the distance of the casing 60 of electronic equipment 5 to the air intake flow of centrifugal cutter 51.Therefore, the inventor actively researchs and analyses this problem, with attempt to centrifugal cutter be optimized the design and centrifugal cutter rational deployment in casing is reached better heat radiating effect, be that birth of the present invention is arranged.

Figure 1 shows that the wherein three-dimensional exploded view of a preferred embodiment of sink 10 of the present invention, this sink 10 comprises a centrifugal cutter 12, one first fins group 14a and one second fins group 14b.This sink 10 is suitable for the heater element in the portable electron devices such as notebook computer is dispelled the heat.

This centrifugal cutter 12 comprises a top board 121, a base plate 122, a rotor 124 relative with top board 121 and is located at the sidewall 123 of the volute between this top board 121 and the base plate 122.Wherein this sidewall 123 is made into integration by die casting or injection molding way with base plate 122.Be appreciated that ground, this sidewall 123 also can be made into integration by die casting or injection molding way with top board 121.The top board 121 of this centrifugal cutter 12, base plate 122 and sidewall 123 surround and form a containing space, and this rotor 124 is located in this containing space.This rotor 124 comprises a wheel hub 125 and the some blades 126 that outwards extend radially from wheel hub 125 peripheries.These top board 121 respective rotor 124 are provided with first intake grill 127 of a circle, so that ambient air enters in the containing space of centrifugal cutter 12.This sidewall 123 is vertical mutually with base plate 122, offer the first exhaust outlet 132a and the second exhaust outlet 132b on this sidewall 123, all linearly shape and both are vertical mutually for this first, second exhaust outlet 132a, 132b, and setting air-flow that centrifugal cutter 12 is produced flows out from two vertical directions like this.This first, second exhaust outlet 132a, 132b place correspondence are provided with first, second fins group 14a, 14b, this first, second fins group 14a, 14b are piled up by some radiating fin and form, and the monnolithic case of this first, second fins group 14a, 14b is consistent with the shape of first, second air-out 132a, 132b.Be appreciated that ground, according to the radiating requirements difference, the exhaust outlet of this centrifugal cutter 12 also can only be established one or more, the shape of exhaust outlet can be lineal shape, arc or both combinations, the quantity of required fins group and the monnolithic case of fins group can be done corresponding adjustment according to the quantity and the shape of exhaust outlet, so that be complementary with the exhaust outlet of centrifugal cutter 12.

Please be simultaneously with reference to Fig. 2 to Fig. 4, the base plate 122 of this centrifugal cutter 12 has a bottom surface of rotor 124 dorsad and towards an end face of rotor 124, wherein the end face of this base plate 122 is relatively near the top board 121 of centrifugal cutter 12, and the bottom surface of base plate 122 is relatively away from the top board 121 of centrifugal cutter.As shown in Figure 2, there is a sinking size bottom surface of this base plate 122 in the scope of respective rotor 124, thereby forms a depression 129a on the bottom surface of base plate 122, and the sidewall 123 that this depression 129a zone extends to centrifugal cutter 12 always joins.At sidewall 123 places near centrifugal cutter 12, a projection 129c is equipped with in this depression 129a zone rotor 124 directions dorsad, and the height of this projection 129c is concordant with the bottom surface of base plate 122, and the setting of this projection 129c can be convenient to the location and the installation of centrifugal cutter 12.The depression 129a of corresponding bottom surface zone forms a protruding 129b on the end face of base plate 122, as shown in Figure 1.First intake grill 127 of these base plate 122 corresponding top boards 121 is provided with second intake grill 128 of a circle, so that more ambient air enters in the centrifugal cutter 12.Have in the present embodiment, the radius of this second intake grill 128 is greater than the radius of first intake grill 127, to increase the air quantity that enters from second intake grill 128.In addition, the radius of this second intake grill 128 also can be with the radius of first intake grill 127 and equates.The middle part of this second intake grill 128 is provided with a columniform supporting portion 130, the rotor 124 of this centrifugal cutter 12 is located on this supporting portion 130, because the end face of the base plate 122 of centrifugal cutter 12 is formed with a protruding 129b in the scope of rotor 124, therefore the rotor 124 of centrifugal cutter 12 moves certain distance on all corresponding with supporting portion 130, makes rotor 124 reduce to some extent apart from the distance of 121 on the top board of heart fan 12.This supporting portion 130 is connected with base plate 122 by some floors 131, and these floors 131 are divided into several portions with second intake grill 128.As shown in Figure 4, these floors 131 are inclined to set, make supporting portion 130 more outstanding towards rotor 124 directions with respect to the depression 129a of base plate 122, thereby the bottom surface of this supporting portion 130 is higher than the depression 129a part of base plate 122 in vertical direction, helps ambient air and enters in the centrifugal cutter 12 from second intake grill 128.

Fig. 4 places the sectional view in the casing 20 of an electronic equipment 1 for sink 10 shown in Figure 1.This casing 20 can be the shell of portable electron device such as notebook computer, and it comprises a loam cake 21 and a lower cover 22 relative with this loam cake 21.This sink 10 is located between this loam cake 21 and the lower cover 22, wherein the top board 121 of this centrifugal cutter 12 is between the base plate 122 of the loam cake 21 of this casing 20 and this centrifugal cutter 12, and the base plate 122 of this centrifugal cutter 12 is between the top board 121 of the lower cover 22 of this casing 20 and centrifugal cutter 12.Be formed with spacing on (top gap) between the top board 121 of this centrifugal cutter 12 and the loam cake 21 of casing 20, be formed with spacing (bottomgap) between the base plate 122 of this centrifugal cutter 12 and the lower cover 22 of casing 20, the height that wherein should go up spacing is H1, and the height of this time spacing is H2.This upper and lower spacing can enter the air flow channel of first, second intake grill 127,128 of centrifugal cutter 14 respectively as ambient air.In the present embodiment, the height of the last spacing between the top board 121 of centrifugal cutter 12 and the loam cake 21 of casing 20 is 3.6mm, following spacing between the depression 129a zone of the base plate 122 of centrifugal cutter 12 and the lower cover 22 of casing 20 is 3.4mm, and the spacing of not having near this base plate first, second exhaust outlet 132a, the 132b 122 between the lower cover 22 of the zone of depression 129a and casing 20 still is 2.5mm, promptly, make that the distance between the lower cover 22 of this base plate 122 and casing 20 is increased by the setting of this depression 129a.Test by the CFD numbered analog simulation, the total discharge that calculates this centrifugal cutter 12 is 4.74cfm, compare with the total discharge 3.91cfm of the centrifugal cutter 51 shown in Fig. 5, under the situation that the spacing between the lower cover 22 of the base plate 122 of spacing between the loam cake 21 of the top board 121 of centrifugal cutter 12 and casing 20 and centrifugal cutter 12 and casing 20 all remains unchanged, by this depression 129a is set on the base plate 122 of centrifugal cutter 12, increased the distance between this sunk area and the casing 20, make the total discharge of centrifugal cutter 12 increase by 21.2%, as seen, the performance of centrifugal cutter 12 has obtained effective lifting.Each blade 126 comprises that the 126a of first portion that is connected with wheel hub 125 reaches the second portion 126b away from wheel hub 125, the 126a of this first portion increases on the direction toward second portion 126b from wheel hub 125 highly gradually, can make highly bigger second portion 126b suck more air-flow like this.

In the present embodiment, owing to form a depression 129a zone in rotor 124 scopes of the corresponding centrifugal cutter 12 in the bottom surface of the base plate 122 of centrifugal cutter 12.When this centrifugal cutter 12 is assembled in the casing 20 of electronic equipment 1, make the spacing between the lower cover 22 of the zone of base plate 122 respective rotor 124 of centrifugal cutter 12 and casing 20 increase, helping more air enters in the centrifugal cutter 12 by second intake grill 128, the total discharge of centrifugal cutter 12 is increased, thereby reach the purpose of the heat dispersion that promotes centrifugal cutter 12.This base plate 122 is not established depression 129a at first, second exhaust outlet 132a, 132b near zone, be unlikely to reduce the size of first, second exhaust outlet 132a, 132b and reduce the area that first, second fins group 14a, 14b are provided with, keep higher flow velocity in the time of can making first, second exhaust outlet of airflow passes 132a, 132b like this, the heat that helps fast first, second fins group 14a, 14b being absorbed distributes.In addition, the depression 129a part on this base plate 122 can be utilized the mould once-through when processing base plate 122, need not to increase manufacture cost.

Claims (12)

1. centrifugal cutter, comprise a top board, a base plate, a rotor and be located at a sidewall between this top board and the base plate, this sidewall is provided with at least one exhaust outlet, this top board is provided with one first intake grill, this base plate is provided with one second intake grill, this top board, base plate and sidewall surround and form a containing space, and this rotor is located in this containing space, it is characterized in that: this base plate forms a depression towards rotor place direction in the scope of respective rotor.
2. centrifugal cutter as claimed in claim 1, it is characterized in that: this base plate has the end face away from a bottom surface of top board and close top board, this depression is formed toward the end face of the base plate size of sinking from the bottom surface of base plate by base plate, and the end face of this base plate is to being recessed to form a projection.
3. centrifugal cutter as claimed in claim 1 is characterized in that: the sidewall that this depression extends to centrifugal cutter joins, and this be recessed near the side-walls of centrifugal cutter dorsad rotor direction be equipped with a projection, the height of this projection is concordant with the bottom surface of base plate.
4. centrifugal cutter as claimed in claim 1 is characterized in that: the external frame of this first intake grill and second intake grill is for circular, and the radius of this second intake grill is greater than the radius of first intake grill.
5. centrifugal cutter as claimed in claim 1, it is characterized in that: this rotor comprises a wheel hub and the some blades that extend from this wheel hub, each blade comprises that the first portion that is connected with wheel hub reaches the second portion away from wheel hub, and this first portion increases gradually from wheel hub toward the second portion height.
6. centrifugal cutter as claimed in claim 1 is characterized in that: the central authorities of this second intake grill are provided with a supporting portion, and described supporting portion is more outstanding towards rotor direction with respect to the depression of base plate.
7. sink comprises a centrifugal cutter and is located at least one fins group of the exhaust outlet of this centrifugal cutter, it is characterized in that: this centrifugal cutter is each described centrifugal cutter in the claim 1 to 6.
8. sink as claimed in claim 7, it is characterized in that: the exhaust outlet of this centrifugal cutter comprises first exhaust outlet of a lineal shape and second exhaust outlet of a lineal shape, this first, second exhaust outlet is vertical mutually, and this fins group comprises first, second fins group of being located at first, second exhaust outlet respectively.
9. electronic equipment, comprise a casing and be located at the interior sink of this casing, this casing comprises a loam cake and a lower cover relative with this loam cake, this sink comprises a centrifugal cutter and is located at least one fins group at the exhaust outlet place of this centrifugal cutter, this centrifugal cutter has a top board, a base plate relative with this top board and be located at top board and base plate between a rotor, the top board of this centrifugal cutter is provided with first intake grill, the base plate of this centrifugal cutter is provided with second intake grill, it is characterized in that: greater than the base plate of this centrifugal cutter distance apart from the lower cover of this casing, the base plate of this centrifugal cutter forms a depression towards rotor place direction to the top board of this centrifugal cutter in the scope of respective rotor apart from the distance of the loam cake of this casing.
10. electronic equipment as claimed in claim 9, it is characterized in that: this sink is located between the loam cake and lower cover of this casing, the top board of this centrifugal cutter is between the base plate of the loam cake of this casing and this centrifugal cutter, and the base plate of this centrifugal cutter is between the top board of the lower cover of this casing and this centrifugal cutter.
11. electronic equipment as claimed in claim 9, it is characterized in that: this base plate has the bottom surface away from top board, this depression is positioned on this bottom surface, the sidewall that this depression extends to centrifugal cutter joins, and this be recessed near the side-walls of centrifugal cutter dorsad rotor direction be equipped with a projection, the height of this projection is concordant with the bottom surface of base plate.
12. electronic equipment as claimed in claim 9, it is characterized in that: the central authorities of this second intake grill are provided with a supporting portion, this supporting portion is connected with the base plate of centrifugal cutter by some ribs, and described supporting portion is more outstanding towards rotor direction with respect to the depression of base plate.
CNB2006101568953A 2006-11-17 2006-11-17 Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device CN100529413C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2006101568953A CN100529413C (en) 2006-11-17 2006-11-17 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
CNB2006101568953A CN100529413C (en) 2006-11-17 2006-11-17 Centrifugal fan, heat radiation device possessing the centrifugal fan and electronic device using the heat radiation device

Publications (2)

Publication Number Publication Date
CN101187379A CN101187379A (en) 2008-05-28
CN100529413C true CN100529413C (en) 2009-08-19

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Families Citing this family (16)

* Cited by examiner, † Cited by third party
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CN101672299B (en) * 2008-09-12 2012-09-19 富准精密工业(深圳)有限公司 Eccentric fan
TWI417037B (en) * 2008-10-03 2013-11-21 Foxconn Tech Co Ltd Centrifugal blower
CN101751094B (en) * 2008-12-10 2013-08-21 富瑞精密组件(昆山)有限公司 Centrifugal fan and electronic device using centrifugal fan
CN101793265B (en) * 2009-02-04 2012-10-10 昆山广兴电子有限公司 Fan casing base
CN101832280A (en) * 2009-03-13 2010-09-15 富准精密工业(深圳)有限公司 Heat-dissipating device, centrifugal fan thereof and electronic device using same
CN101841987A (en) * 2009-03-21 2010-09-22 富准精密工业(深圳)有限公司 Heat sink and fastener thereof
CN102238846A (en) * 2010-04-27 2011-11-09 富准精密工业(深圳)有限公司 Radiating device
CN102279639A (en) * 2010-06-10 2011-12-14 鸿富锦精密工业(深圳)有限公司 Radiating device and centrifugal fan thereof
CN102562618B (en) * 2010-12-14 2014-12-03 台达电子工业股份有限公司 Centrifugal fan
CN103807216B (en) * 2012-11-15 2017-07-11 赛恩倍吉科技顾问(深圳)有限公司 Radiator fan and the heat abstractor with radiator fan
CN103906403B (en) * 2012-12-25 2016-09-07 神讯电脑(昆山)有限公司 The radiator structure of electronic installation
CN105090063B (en) * 2014-05-21 2017-09-19 台达电子工业股份有限公司 Fan assembly
CN105370590B (en) * 2014-09-02 2017-12-22 富瑞精密组件(昆山)有限公司 Thin fan
CN106194844B (en) * 2015-05-04 2018-11-23 全亿大科技(佛山)有限公司 Combination type fan
JP2017112190A (en) * 2015-12-15 2017-06-22 富士電機株式会社 Cooler and power converter
CN208868303U (en) * 2018-06-25 2019-05-17 深圳市道通智能航空技术有限公司 Radiator structure and unmanned vehicle

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