CN100531538C

CN100531538C - Heat radiating device

Info

Publication number: CN100531538C
Application number: CNB2006100609439A
Authority: CN
Inventors: 黄清白; 孟劲功; 林然
Original assignee: Hong Jun Precision Industry Co ltd; Fuzhun Precision Industry Shenzhen Co Ltd
Current assignee: Hong Jun Precision Industry Co ltd; Fuzhun Precision Industry Shenzhen Co Ltd
Priority date: 2006-06-02
Filing date: 2006-06-02
Publication date: 2009-08-19
Anticipated expiration: 2026-06-02
Also published as: CN101083889A

Abstract

The present invention is a kind of heat-scattered device, including a centrifugal fan and a radiating fin group located at outlet of the fan. The radiating fin group is composed of several parallel radiating fins. The centrifugal fan includes a rotor with several flabellate which is designed to bring a first tongue outlet and a second tongue outlet, of which the first tongue outlet is away from the radiating fin group, the second tongue outlet is located between the first tongue outlet and the outlet of fan. The first and second tongue outlets can induce the airflow caused by the centrifugal fan parallel to the radiating fin group and reduce the energy loss caused by collision of airflow and radiating fin group, thus the airflow velocity will not obviously decreased, and will be easier to get through the surface of radiating fin group, and the radiating effect of the heat-scattered device can be improved.

Description

Heat abstractor

Technical field

The present invention relates to a kind of heat abstractor, particularly relates to a kind of heat abstractor to the heat-generating electronic elements heat radiation.

Background technology

Along with improving constantly of central processing unit 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 radiator fan 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, the air-flow that is produced by the radiator fan heat that will reach the radiating fin group is taken away again, so the collocation of radiator fan and radiating fin group has very large influence to the heat dispersion of system.

Be illustrated in figure 4 as the vertical view and the air flow direction figure of heat abstractor 20 in the prior art, this heat abstractor 20 comprises a radiating fin group 21 and a centrifugal fan 22.This radiating fin group 21 is piled up by some radiating fins 211 and is formed, this radiating fin group 21 be arranged at centrifugal fan 22 air outlet 229 places and with a heat-generating electronic elements (figure do not show) hot link to absorb the heat that this heat-generating electronic elements produces.This centrifugal fan 22 comprises a housing 221, a stator (figure does not show) and can be around the rotor 223 of this stator rotation, and this rotor 223 is arranged in this housing 221.When centrifugal fan 22 operations, thereby this rotor 223 rotates counterclockwise the air-flow that generation blows to radiating fin group 21 around stator, takes away with the heat that radiating fin group 21 is absorbed, thereby reaches the purpose of heat radiation.

This heat abstractor 20 is in when work, and this housing 221 is guided air-flow the air outlet 229 of centrifugal fan 22 into, and air-flow is left centrifugal fan 22 and blowed to radiating fin group 21 by these air outlet 229 places.Shown in arrow among the figure, the flow direction at radiating fin 211 places among this air flow direction figure outside the dashed rectangle and radiating fin 211 almost parallels at this place, and the radiating fin 211 at the flow direction at 211 places of the radiating fin in the dashed rectangle and this place forms an angle in the flow graph, cause flowing to the air-flow at this place and the radiating fin 211 at this place bumps, make air-flow that certain kinetic energy rejection be arranged, air-flow velocity will descend significantly, so just reduced the heat exchanger effectiveness of radiating fin group 21 with air-flow, cause the radiating efficiency of heat abstractor 20 effectively to be promoted, therefore need be improved.

Summary of the invention

In view of this, be necessary to provide a kind of heat abstractor that promotes heat dispersion.

This heat abstractor comprises a centrifugal fan and is located at the radiating fin group at this centrifugal fan air outlet place, this radiating fin group is made up of some radiating fins parallel to each other, this centrifugal fan comprises a base plate, one sidewall and one has the rotor of some flabellums, its sidewall is provided with first a tongue mouth away from the radiating fin group, this first tongue mouth is by the inside projection of this inside surface of side wall, this base plate is provided with one second tongue mouth between this first tongue mouth and air outlet, thereby this second tongue mouth near sidewall and and this sidewall spacers is opened and this sidewall between form a runner, this second tongue mouth enters in the described runner for air-flow to form an inlet separately near an end and this first tongue mouth of this first tongue mouth, this second tongue mouth is parallel with this radiating fin near the end of air outlet, the air-flow that centrifugal fan running produces flows to the first tongue mouth along the second tongue mouth, and the part in the described air-flow enters in the runner between the second tongue mouth and the sidewall by described inlet and flows to along this runner between the radiating fin of the set radiating fin group of air outlet.

The first tongue mouth of the centrifugal fan in this heat abstractor and the second tongue mouth are with air-flow almost parallel ground this radiating fin group of guiding, the energy loss that can reduce the collision of air-flow and radiating fin group and produce, make air-flow velocity be unlikely to descend significantly, help the surface that air-flow flows through the radiating fin group apace, can improve the heat exchanger effectiveness of radiating fin group and air-flow, thereby promote the heat dispersion of heat abstractor.

Description of drawings

Fig. 1 is the three-dimensional exploded view of heat abstractor of the present invention.

Fig. 2 is the three-dimensional assembly diagram of heat abstractor of the present invention.

Fig. 3 is the vertical view and the air flow direction figure of heat abstractor of the present invention.

Fig. 4 is the vertical view and the air flow direction figure of heat abstractor in the prior art.

Embodiment

The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.

Please refer to Fig. 1 and Fig. 2, heat abstractor 10 of the present invention comprises a radiating fin group 11 and a centrifugal fan 12.A this radiating fin group 11 and a heat-generating electronic elements (figure does not show) hot link is to absorb the heat that heat-generating electronic elements produces, and this centrifugal fan 12 provides the air-flow that blows to radiating fin group 11 with elevated pressures to be dispersed in the ambient air with the heat that this radiating fin group 11 is absorbed.

This centrifugal fan 12 comprises that a housing 121, is located at the rotor 124 that lid 122 and on this housing 121 has some flabellums 123.This lid 122 surrounds with this housing 121 and forms an accommodation space, and this rotor 124 is arranged in this accommodation space and running counterclockwise.This lid 122 is provided with a through hole with the air inlet 125 as this centrifugal fan 12, this housing 121 comprises the sidewall 127 of a base plate 126 and a volute, this base plate 126 is perpendicular to the axis A of the rotor 124 of centrifugal fan 12, in the middle of it position be provided with this lid 122 on air inlet 125 corresponding air inlets 128.This sidewall 127 is vertical with this base plate 126, which is provided with an opening with as with the air outlet 129 of this centrifugal fan 12.The sidewall 127 of this housing 121 on its inner surface away from the also inwardly prominent first tongue mouth 130 roughly triangular in shape of establishing in the position of this air outlet 129, this first tongue mouth 130 the inner surface of housing 121 form one first arcwall face 137 and by this first arcwall face 137 to one second arcwall face 136 that extends away from the direction of rotor 124 flabellums 123, the setting of this first tongue mouth 130 can make this first arcwall face 137 increase gradually along the direction that rotor 124 turns round apart from the free-ended distance of the flabellum 123 of rotor 124, and make the free end of the most close flabellum 123 in position that this first arcwall face 137 and this second arcwall face 136 intersect, can increase the pressure of the air-flow herein of flowing through, and then its flow velocity is improved, and this second arcwall face 136 suffered resistance of air-flow that can reduce this place that flows through.The prominent second tongue mouth 131 between this first tongue mouth 130 and air outlet 129 of establishing on this base plate 126, this second tongue mouth 131 roughly is the strip that dual-side is an arc, its end near the first tongue mouth 130 is thinner, end near air outlet 129 is then thicker, this second tongue mouth 131 reduces to close air outlet 129 1 ends from the close first tongue mouth, 130 1 ends gradually apart from the free-ended distance of the flabellum 123 of rotor 124, form the side of arc, the suffered resistance of air-flow of flowing through is herein reduced, so that air-flow passes through smoothly.This second tongue mouth 131 is provided with an end 132 of extending to air outlet 129 bendings near an end of air outlet 129, an and projection 135 of establishing to the free distal process of the flabellum 123 of this rotor 124 in 132 formation of this second tongue mouth 131 and this end, this projection 135 is less apart from flabellum 123 free-ended distances, can increase the pressure of the air-flow at this place that flows through, and then its flow velocity is improved; But this second tongue mouth 131 keep at a certain distance away near first arcwall face 137 of an end of the first tongue mouths 130 and the first tongue mouth 130 and form air feed flow to into one enter the mouth 133.This second tongue mouth 131 near the sidewall 127 of these housings 121 and and this sidewall 127 is spaced apart and and this sidewall 127 between form a runner 134 that can make the air-flow process, the width of this runner 134 is from increasing gradually to close air outlet 129 1 ends near the first tongue mouth, 130 1 ends, and promptly the width of this runner 134 increases to radiating fin group 11 gradually from the end away from radiating fin group 11.

This radiating fin group 11 is positioned at air outlet 129 places of this centrifugal fan 12, this radiating fin group 11 is to be piled up along the direction vertical with the rotor axis A of centrifugal fan 12 by some radiating fins 111 parallel to each other to form, and is formed with gas channel 112 between per two adjacent radiating fins 111.This radiating fin group 11 has a first end 113, a middle part 114 and a second end 115, and the end 132 of the second tongue mouth 131 of this centrifugal fan 12 extends to the second end 115 places and almost parallel with the radiating fin 111 at these the second end 115 places.This radiating fin group 11 is by a heat pipe (figure does not show) and heat-generating electronic elements hot link, to absorb the heat that this heat-generating electronic elements produces.

Please be simultaneously with reference to Fig. 3, vertical view and air flow direction figure for heat abstractor 10, the air-flow that these centrifugal fan 12 runnings produce flows to the first tongue mouth 130 along the second tongue mouth 131, this air-flow is near the arrival first tongue mouth 130 after projection 135 pressurizations of the second tongue mouth 131, wherein a part of air-flow is entered in the runner 134 along second arcwall face 136 of the first tongue mouth 130 by inlet 133 places, and flow to air outlet 129 right sides, and flow in the gas channel 112 of radiating fin group 11 with direction with radiating fin 111 almost parallels at the second end 115 places of radiating fin group 11 along the inner surface of the sidewall 127 of this housing 121; Wherein another part air-flow is after the pressurization of the intersection of first arcwall face 137 of this first tongue mouth 130 and second arcwall face 136, first arcwall face 137 along this first tongue mouth 130 advances, and continue to flow to air outlet 129 left sides along the inner surface of the sidewall 127 of this housing 121, wherein a part of air-flow flows in the gas channel 112 of this radiating fin group 11 with the direction with radiating fin 111 almost parallels at first end 113 places of radiating fin group 11.This flows to other a part of air-flow in air outlet 129 left sides, along flowing to 132 places, end of this second tongue mouth 131, flow in the gas channel 112 of this radiating fin group 11 in the direction of radiating fin 111 almost parallels at the guide function lower edge of this end 132 and this place with the radiating fin 111 at 114 places, middle part of radiating fin group 11 direction in a certain angle.Flow to the subregion at the middle part 114 of radiating fin group 11 like this, the air-flow of first end 113 and the second end 115 all with radiating fin 111 almost parallels at this place, the zone (as shown in dashed rectangle among Fig. 3) that makes air flow direction and radiating fin 111 form angle obviously reduces than prior art (as shown in dashed rectangle among Fig. 4), the energy loss that can reduce air-flow and radiating fin 111 collisions and produce, make air-flow velocity be unlikely to descend significantly, help the surface that air-flow flows through radiating fin group 11 apace, can improve the heat exchanger effectiveness of radiating fin group 11 and air-flow, thereby promote the heat dispersion of heat abstractor 10.

Claims

1. heat abstractor, comprise a centrifugal fan and be located at the radiating fin group at this centrifugal fan air outlet place, this radiating fin group is made up of some radiating fins parallel to each other, this centrifugal fan comprises a base plate, one sidewall and one has the rotor of some flabellums, it is characterized in that: this sidewall is provided with first a tongue mouth away from the radiating fin group, this first tongue mouth is by the inside projection of this inside surface of side wall, this base plate is provided with one second tongue mouth between this first tongue mouth and air outlet, thereby this second tongue mouth near sidewall and and this sidewall spacers is opened and this sidewall between form a runner, this second tongue mouth enters in the described runner for air-flow to form an inlet separately near an end and this first tongue mouth of this first tongue mouth, this second tongue mouth is parallel with this radiating fin near the end of air outlet, the air-flow that centrifugal fan running produces flows to the first tongue mouth along the second tongue mouth, and the part in the described air-flow enters in the runner between the second tongue mouth and the sidewall by described inlet and flows to along this runner between the radiating fin of the set radiating fin group of air outlet.

2. heat abstractor as claimed in claim 1 is characterized in that: this radiating fin parallel to each other forms along piling up with the direction of the axis normal of the rotor of this centrifugal fan.

3. heat abstractor as claimed in claim 1 is characterized in that: the width of this runner increases to the radiating fin group gradually from the end away from the radiating fin group.

4. heat abstractor as claimed in claim 1, it is characterized in that: this first tongue mouth is triangular in shape, second arcwall face that it has first arcwall face and intersects with this first arcwall face, this first arcwall face increases along the direction that rotor turns round gradually apart from the free-ended distance of the flabellum of the rotor of this centrifugal fan.

5. heat abstractor as claimed in claim 1 is characterized in that: this second tongue mouth is the strip that dual-side is an arc, and it is thinner near the first tongue mouth, one end, and is then thicker near air outlet one end.

6. heat abstractor as claimed in claim 1 is characterized in that: this second tongue mouth reduces from an end to the end near air outlet near the first tongue mouth gradually apart from the free-ended distance of the flabellum of this rotor.

7. heat abstractor as claimed in claim 1 is characterized in that: the projection that formation is established to the free distal process of the flabellum of this rotor between this second tongue mouth and this end.