CN101087508B

CN101087508B - Radiator

Info

Publication number: CN101087508B
Application number: CN2006100610864A
Authority: CN
Inventors: 黄清白; 李志坚
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: 2006-06-09
Filing date: 2006-06-09
Publication date: 2011-12-28
Anticipated expiration: 2026-06-09
Also published as: CN101087508A

Abstract

A radiator includes several radiating fins which are set parallel with each other and a hot pipe which is arranged through the radiating fins. A flow channel for air flow is formed between adjacent radiating fins. The air flow flows from one end of the radiating fins to opposite other end. A through hole for the hot pipe is arranged on every radiating fin. Several projections are arranged around the through hole on the radiating fin, said several projections are arranged in a shrinkage type around the through hole in an air flow moving direction, and form a gradual shrinkage space in the air flow moving direction around the through hole, so that the air flow centralizedly flows to a position of the radiating fin behind the corresponding hot pipe. Said projections can increase radiating area of the radiating fin, at the same time guide flow and change flow field of the air flow, increase burbling effect on a radiating fin surface, effectively improve radiating efficiency.

Description

Radiator

Technical field

The present invention relates to a kind of radiator, particularly a kind of radiator that is applicable to electronic element radiating.

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 computer.In order to take away the heat that system produces efficiently in limited space, industry mainly adopts by the mode of radiating fin, heat pipe and radiator fan combination and dispels the heat at present.Fan mainly provides flow air, and mainly in order to transmit heat at a distance, the task of radiating fin then is the heat that heat pipe brings to be delivered in the external environment by the moving air that fans drive produced go to heat pipe.This shows in fixing volumetric spaces, can the heat that in time dredge electronic component and produced depend on whether a radiating fin is efficiently arranged.If adopt the radiating fin of slab construction, when fan airstream is flowed through radiating fin, since the influence of viscous force, the contact portion cambium layer laminar sublayer of radiating fin surface and air-flow, the flow velocity of air-flow is almost nil in this laminar sublayer, and heat exchange effect reduces greatly.Therefore if can promote the heat exchange effect of radiating fin and fan airstream, just can promote the radiator heat-dissipation effect greatly.

Summary of the invention

The object of the present invention is to provide a kind of radiator that can promote radiating efficiency.

This radiator comprises some radiating fins that be arranged in parallel and a heat pipe that is arranged on the fin, form the runner that air feed stream passes through between adjacent radiating fin, air-flow flows to the relative other end from an end of radiating fin, each radiating fin is provided with the through hole that passes for this heat pipe, around through hole, be provided with some projectioies on each radiating fin, described some projectioies overall alignment on every side in through hole on the air-flow direct of travel is contraction-like, and around through hole along the space that forms a gradually-reducing shape on the direct of travel of air-flow, air-flow is concentrated flow to the position at the corresponding heat pipe of radiating fin rear.

Form projection on the radiating fin of this radiator, can increase the area of dissipation of radiating fin, but the flowing and change air velocity distribution of air-guiding also simultaneously strengthens the flow-disturbing effect on the radiating fin surface, effectively promotes radiating efficiency.

Description of drawings

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

Fig. 1 is the radiator schematic perspective view.

Fig. 2 separates schematic diagram for the radiating fin component.

Fig. 3 is another angular views of Fig. 2.

Fig. 4 is a radiating fin vertical view wherein.

Embodiment

With reference to the accompanying drawings, be described further in conjunction with the embodiments.

As shown in Figure 1, this radiator comprises that a radiating fin group 10, is arranged in the heat pipe 40 on this radiating fin group 10, and one places radiating fin group 10 1 ends to be used to provide the radiator fan 60 of forced draft.The air-flow that fan 60 is produced can flow in the radiating fin group 10 along the direction of arrow in the figure, takes away heat thereby carry out heat exchange with radiating fin group 10.

Please also refer to Fig. 2 to Fig. 4, this radiating fin group 10 comprises some fins that are arranged in parallel 20, each fin 20 comprises a body 201 and is formed at the flanging 203 at body 201 two ends respectively, the flanging 203 of each fin 20 mutually against, thereby between adjacent two fins 20, form a runner 23 that extends along flanging 203 length directions.Each fin 20 is provided with a through hole 25 near the side of fans 60, and the shape size of this through hole 25 is corresponding with the shape of cross section size of heat pipe 40, can be circle, square etc. as the shape according to heat pipe, so that the wearing of heat pipe 40.Among this embodiment, through hole 25 roughly is square, and its corner forms circular arc chamfering.Fin 20 stretches out from the periphery of through hole 25 and forms an annular flange flange 27, spacing between the height of this flange 27 and adjacent two fins 20 about equally, when thereby described radiating fin group 10 is assembled into one, the flange 27 of each fin 20 leans with the body 201 of adjacent fin 20, the described flange 27 common column accommodation spaces that form a ccontaining heat pipe 40, can effectively increase the contact area of heat pipe 40 and fin 20, make the heat of heat pipe 40 better be passed to fin 20.

As Fig. 2 and shown in Figure 4, form four projectioies 221,222,223,224 on each fin 20.Described protruding 221,222,223,224 are distributed in around the through hole 25, with respect to through hole 25 along the symmetry axis X-X on fin 20 length directions, described protruding 221,222,223,224 are asymmetric distribution, wherein first, second projection 221,222 is positioned at the downside of axis X-X, the 3rd projection 223 is positioned at the upside of axis X-X, the 4th projection 224 is positioned on axis X-X, and along the flow direction of air-flow, the 4th projection 224 is positioned at the dead astern of through hole 25.This first projection 221 roughly be positioned at through hole 25 under, along the flow direction of air-flow, 222,223 rear sides that are divided into through hole 25 of second, third projection, thereby can effectively strengthen heat exchange area and the flow-disturbing effect of radiating fin 20 corresponding to heat pipe 40 rear positions.The all relative axis X-X of first, second, third projection 221,222,223 is skewed setting, each projection 221 (222,223) along the flow direction of air-flow from the marginal position of fin 20 to the middle part of fin 20 diagonally extending, and differ in the angle of inclination of this first, second, third projection 221,222,223, thereby form the angle that varies in size respectively with axis X-X, promptly first projection 221 is smaller than second projection the 222 or the 3rd projection 223 and the formed angle of axis X-X with the angle of axis X-X.See along the flow direction of air-flow that promptly described protruding 221,222,223 form the space of a gradually-reducing shape around heat pipe through hole 25, effectively steering current is concentrated the position that flows to fin 20 corresponding heat pipes 40 rears, strengthens the heat exchange effect of this part.As shown in Figure 3, form four strips depressions 24 respectively in the position of corresponding four projectioies 221,222,223,224 of the opposite side of fin 20.The setting of described depression 24 makes fin 20 downsides be non-planar, can strengthen the flow-disturbing effect of air-flow equally.This depression 24 can be shaped on the fin 20 by modes such as punching presses, and forms above-mentioned protruding 221,222,223,224 simultaneously.

Heat pipe 40 comprises an evaporation part that is used for contacting with thermal source (figure does not show) and is arranged in condensation part on the described fin 20, utilize heat pipe 40 fast heat conductivility the heat that thermal source produced can be passed on the fin 20 quickly and evenly.

During this radiator work, the evaporation part of heat pipe 40 absorbs the heat that thermal source produces, liquid working media heat absorption evaporation in the heat pipe 40 is also mobile to the condensation part of heat pipe 40, discharge in the condensation part then from heat and condensing reflux to evaporation part that thermal source absorbed and enter circulation next time, absorb, discharge a large amount of latent heat so repeatedly, the heat that thermal source produced is passed to fin 20 fast.Heat pipe 40 is with heat transferred during to fin 20, fin 20 is near the zone of heat pipe 40, be that heat in the peripheral edge margin of through hole 25 is comparatively concentrated, form the heat-dense district, and the forced draft that fan 60 produced is blocked by heat pipe 40 and can not directly arrive the dead astern of heat pipe 40, the heat exchange effect of heat pipe 40 rear areas and air-flow relative a little less than, so the heat-dense district is even more serious with heat pipe 40 rear areas again.When air-flow direction shown in the arrow in Fig. 1 enters between the fin 20 in the formed runner 23, because four strip projectioies 221,222,223,224 integral body on the air-flow direct of travel is contraction-like arrangement on the fin 20, but air-guiding flows to the heat-dense district of fin 20, and form turbulent flow at heat pipe 40 rear areas, the heat in this heat-dense district is taken away by the air-flow that fan 60 is produced fast.In addition, air-flow is when flowing through fin 20 surfaces, because the influence of factors such as stickiness power, form a laminar sublayer on fin 20 surfaces, the setting of projection 221,222,223,224 then is equivalent to be provided with a barrier on the runner of air-flow, can effectively destroy the laminar sublayer that is formed at fin 20 surfaces, strengthens the flow-disturbing effect of air-flow in fin 20 surfaces, strengthen the heat exchange between fin 20 and the air-flow, finally promote the integral heat sink effect of radiator.The formation of four strip projectioies 221,222,223,224 has also increased the heat exchange area that fin 20 contacts with air-flow simultaneously on the fin 20, helps the lifting of radiating efficiency.

Among this embodiment, described projection is asymmetric and is arranged at around the through hole, along the air-flow direct of travel, the rear of the through hole that projection mainly is distributed in heat pipe and is worn, and the protruding quantity of through hole both sides is also inequality, the quantity of projection that is positioned at axis X-X upside is less than the quantity of the projection of downside, and also is non-parallel setting between each projection.In fact, the quantity of projection 221,222,223,224 can be set according to the situation of fin 20 and heat pipe 40, can be two or more, its arrangement mode also can change, as the particular location that can on fin 20, pass according to heat pipe 40, suitably adjust the arrangement of each projection, also can add projection in the place ahead of heat pipe 40.Each projection can be arranged in parallel or parallel and not parallel assembled arrangement, as long as its overall alignment is contraction-like along the air-flow direct of travel, the function that can play steering current and add the air blast heat exchange gets final product.Each protruding shape also is not limited only to elongate in shape, can be circular arc or other shape, also can be the combination of circular arc and strip or other shape, and its size can be identical or inequality.As long as can change air velocity distribution, strengthen the flow-disturbing effect, the present invention can realize with above-mentioned other forms.

Claims

1. radiator, comprise some radiating fins that be arranged in parallel and a heat pipe that is arranged on the fin, form the runner that air feed stream passes through between adjacent radiating fin, air-flow flows to the relative other end from an end of radiating fin, each radiating fin is provided with the through hole that passes for this heat pipe, it is characterized in that: around through hole, be provided with some projectioies on each radiating fin, described some projectioies overall alignment on every side in through hole on the air-flow direct of travel is contraction-like, and around through hole along the space that forms a gradually-reducing shape on the direct of travel of air-flow, air-flow is concentrated flow to the position at the corresponding heat pipe of radiating fin rear.

2. radiator as claimed in claim 1 is characterized in that: described projection is circular arc.

3. radiator as claimed in claim 1 is characterized in that: described projection is elongated.

4. radiator as claimed in claim 1 is characterized in that: described projection is the combination of circular arc and strip.

5. radiator as claimed in claim 1 is characterized in that: described projection is along the diagonally extending setting in the middle part of fin from the fin edge of air-flow direct of travel.

6. radiator as claimed in claim 5 is characterized in that: differ in described each protruding angle of inclination.

7. radiator as claimed in claim 1 is characterized in that: described projection is not of uniform size.

8. radiator as claimed in claim 1 is characterized in that: described projection along air-flow direct of travel asymmetric distribution in the through hole both sides.

9. radiator as claimed in claim 1 is characterized in that: at least one projection is arranged at the through hole dead astern.

10. radiator as claimed in claim 1 is characterized in that: further comprise and be located at radiating fin one end in order to produce the fan of air-flow.