CN2800717Y

CN2800717Y - Heat radiator

Info

Publication number: CN2800717Y
Application number: CN 200520058105
Authority: CN
Inventors: 夏万林; 李涛; 钟勇
Original assignee: Fuzhun Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Fuzhun Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2005-05-07
Filing date: 2005-05-07
Publication date: 2006-07-26
Anticipated expiration: 2015-05-07

Abstract

The utility model relates to a heat radiating device, which comprises a base, and a plurality of heat radiating fins which are arranged on the base at intervals. Airflow channels of which the both ends are open are formed between adjacent heat radiating fins. A plurality of openings for communicating the adjacent airflow channels are arranged on each heat radiating fin, and warping slices extend from the edges of the openings. The heat radiating device of the utility model makes the air current flowing through the airflow channels circulate in each airflow channel through the openings under the guiding action of the warping slices. As a consequence, the air current sufficiently contacts the radiation fins to conduct heat exchange, and radiation efficiency of the heat radiator is improved.

Description

Heat abstractor

[technical field]

The utility model relates to a kind of heat abstractor, is meant a kind of heat abstractor of cooling electronic components especially.

[background technology]

Along with electronic industry constantly develops, the speed of service and the overall performance of electronic component (as central processing unit) constantly promote, and its caloric value increases thereupon, on the other hand, the integrated level of electronic component is deepened day by day, and volume is more and more littler, so its heating problem is also just more outstanding, yet, electronic component must be in certain operating temperature range work, if exceed this operating temperature range, its runnability will be had a strong impact on, so the heat of its generation need distribute timely, to guarantee its normal operation.

For this reason, industry is everlasting and a heat abstractor is installed to distribute the heat of its generation on this electronic component.Usually, this heat abstractor comprises a radiator, this radiator comprises a substrate and some flat plate radiation fins, these some radiating fins are set in parallel on this substrate with a determining deviation, thereby, form a gas channel between two adjacent radiating fins, for adding flowing of the gas channel of air blast between radiating fin, promote the heat exchange between air-flow and the radiating fin, this heat abstractor also often comprises a fan, and the corresponding gas channel direction of this fan is placed at a side or the top of this radiator.Because the character of fluid, form a detention layer on the interface that air communication is everlasting with radiating fin contacts, this detention layer hinders air-flow and fully contacts with radiating fin, in addition, this radiating fin is plate shaped, the gas channel of its formation is a linear, the zone outside this gas channel detention layer then, the resistance that air-flow is subjected on flow direction is less, thereby this air-flow is not fully contacting effluent gases circulation road under the situation of carrying out heat exchange with radiating fin, thereby the radiating fin utilance of heat abstractor is not high, and efficient remains further to be promoted.

[summary of the invention]

By the following examples the utility model is illustrated:

Heat abstractor comprises a pedestal and is located at most spaced radiating fin on this pedestal among the utility model embodiment, form the gas channel of both ends open between adjacent radiating fin, each radiating fin is provided with the perforate of the adjacent gas channel of some connections, and this verge of opening is extended with fin.

Compared with prior art, because the radiating fin of the utility model embodiment heat abstractor is provided with perforate and fin, this perforate is communicated with each gas channel, this fin plays guide function to the air-flow that flows to gas channel, the air-flow air ring is circulated around radiating fin, thereby make air-flow fully contact radiating fin, and avoid air-flow not carrying out under the situation of heat exchange with regard to the effluent stream passage with radiating fin, and then make the heat exchange between air-flow and radiating fin comparatively abundant, promote the radiating efficiency of this heat abstractor.

With reference to the accompanying drawings, the utility model embodiment is further described.

[description of drawings]

Fig. 1 is the three-dimensional exploded view of the utility model heat abstractor one embodiment.

Fig. 2 is the schematic diagram of radiating fin among Fig. 1.

Fig. 3 is the sectional plain-view drawing of fin along the III-III line that partly dispel the heat among Fig. 1.

Fig. 4 is the three-dimensional combination figure of Fig. 1.

Fig. 5 is the schematic diagram of another embodiment of the utility model heat abstractor.

[embodiment]

See also Fig. 1 to Fig. 4, this heat abstractor is used for being installed in circuit board (figure does not show) and goes up to dispel the heat on the central processing unit heat-generating electronic elements such as (figure do not show) to installation on it.This heat abstractor comprises a pedestal 10, a base plate 20, some radiating fins 30, two side plates 40, two heat pipes 50 and a top flat 60.

Said base 10 roughly is square, and it is the metal plates such as copper with high heat transfer coefficient, and its upper surface is offered two grooves 110 in conjunction with heat pipe 50 in its entad.

Above-mentioned base plate 20 roughly is square, be located on the said base 10, it has the flat part 210 of a contact pedestal 10, one relative both sides of this flat part 210 extend upward slightly, formation one exceeds the extension 220 of flat part 210 slightly, and these extension 220 edge respective slot 110 positions are offered two otch 230 respectively.

Above-mentioned some radiating fins 30 are stacked and placed on 220 of flat part 210 tops two extensions of this base plate 20 with a determining deviation parallel layers, and bottom radiating fin 30 is at regular intervals with the flat part 210 of base plate 20.Each radiating fin 30 roughly is square, it has a body 310, these body 310 1 relative both side edges bend respectively in the same way extends a flanging 320, this flanging 320 is replaced the body 310 of adjacent radiating

fin

30,30 of adjacent radiating fins form a gas channel, the flanging 320 of these some radiating fins 30 forms a contact-making surface, the relative direction of two parts in parallel another relative both sides is provided with some venetian blind type structures relatively on the body 310 of each radiating fin 30, the venetian blind type structure of each part is identical, this venetian blind type structure comprises a lengthwise perforate 330 and a fin 340, this fin 340 acutangulates from a side of this perforate 330 and with perforate 330 and stretches out this body 310, promptly this fin 340 tilts to perforate 330 directions, this two-part fin 340 is and is symmetrical arranged, and is positioned at the homonymy of body 310.

Above-mentioned two side plates 40 all roughly are square, place respectively on the extension 220 of above-mentioned base plate 20, with inserting and putting therebetween of above-mentioned stacked radiating fin 30, the medial surface of each side plate 40 contacts the flanging 320 of above-mentioned radiating fin 30, this medial surface is offered two grooves 410 in conjunction with heat pipe 50 in otch 230 places of corresponding base plate 20, and this two groove 410 " eight " font that roughly is down on this side plate 40 distributes.

Above-mentioned each heat pipe 50 roughly is " U " shape, it comprises a horizontal evaporation part 510 and the two parallel condensation parts 520 of being extended vertically upward by these 510 two ends, evaporation part, this evaporation part 510 is slightly curved with 520 junctions, condensation part, this evaporation part 510 is bonded in the groove 110 of pedestal 10, and the otch 230 of condensation part 520 by base plate 20 stretches out base plate 20 and be bonded in the groove 410 of side plate 40.

Above-mentioned top flat 60 is covered with above-mentioned radiating fin 30 tops, and these top flat 60 1 relative both sides relatively bending are extended with limit portion 610, and this limit portion 610 replaces top layer radiating fin 30.

Thereby above-mentioned base plate 20, side plate 40 and top flat 60 enclose above-mentioned radiating fin 30 to be put wherein, and makes the relative both-side opening of heat abstractor, and wherein a side is installed a fan (figure does not show), provides the strong convection air-flow to this radiating fin 30.

The heat that this heat abstractor produces when absorbing central processing unit work by pedestal 10, reach side plate 40 by heat pipe 50 again, and then reach radiating fin 30, the strong convection air-flow that fan provides flows in the gas channel of 30 of radiating fins, carry out heat exchange with radiating fin 30, distribute the space outside heat abstractor then.

With respect to prior art, radiating fin is provided with the venetian blind type structure in the present embodiment, the perforate 330 of this venetian blind type structure is communicated with each gas channel of 30 of radiating fins, when strong convection air flow direction airflow path that fan provides, the fin 340 of this venetian blind type structure has flowed to guide function to it, make air-flow flow to adjacent gas channel by this gas channel, thereby make air ring around radiating fin 30 circulations, like this, destroy the air-flow detention layer on radiating fin 30 surfaces on the one hand, make low-temperature airflow fully contact radiating fin 30, avoid air-flow not carrying out under the situation of heat exchange with regard to the effluent stream passage on the other hand with radiating fin 30, thereby, make the heat exchange between air-flow and the radiating fin 30 comparatively abundant, and then the utilance of raising radiating fin 30 and fan, the heat-sinking capability of this heat abstractor is promoted.

In addition, adopt heat pipe 50 to transmit heat in the present embodiment, improve the heat transfer rate of heat abstractor, and this heat abstractor is provided with two side plates 40 in radiating fin 30 both sides, the condensation part 520 of heat pipe 50 is arranged on this side plate 40, thereby the heat that is passed to this side plate 40 by this heat pipe 50 reaches on it from radiating fin 30 both sides, and it is comparatively rapid to conduct heat.

See also Fig. 5, this figure discloses another embodiment of the present utility model, itself and the first embodiment difference are, radiating fin 30 parallel spaced sets side by side are on a plate shaped base plate 20 ', the root edge of each radiating fin 30 is bonded on this base plate 20 ', the apical margin of this radiating fin 30 is established a top board 40 ', two heat pipes 50 ' all roughly are " C " shape, each heat pipe 50 ' comprises an evaporation part and the condensation part parallel with this evaporation part and connects the pars intermedia of this evaporation part and condensation part, this evaporation part is bonded in the groove 110 of pedestal 10, this condensation part is bonded in the two set parallel grooves of top board 40 ' bottom surface, radiating fin 30 both sides are provided with two lateral plates 60 ', and the top of this two lateral plate 60 ' and bottom are bonded to top board 40 ' and base plate 20 ' respectively.This base plate 20 ', top board 40 ' and two lateral plates 60 ' enclose this radiating fin 30 to be put wherein.

In the foregoing description, pedestal and base plate can be integrated, and the evaporation part of heat pipe can be made as flat.

In the foregoing description, the condensation part of heat pipe can directly be bonded on the radiating fin; Can seal under the situation of gas channel at the formed contact-making surface of the flanging of radiating fin, the side plate of radiating fin both sides or the top board of apical margin also can save.

In the foregoing description, the fin of radiating fin venetian blind type structure can be all stretches out body from the homonymy of perforate, and this venetian blind type structure also can be uniformly distributed on the radiating fin body.

Claims

1. heat abstractor, comprise a pedestal and be located at most spaced radiating fin on this pedestal, it is characterized in that: the gas channel that forms both ends open between adjacent radiating fin, each radiating fin is provided with the perforate of the adjacent gas channel of some connections, and this verge of opening is extended with fin.

2. heat abstractor as claimed in claim 1 is characterized in that: described heat abstractor also comprises two relative sealing surfaces, and this two sealing surface contacts one common peripheral with two opposite side of above-mentioned radiating fin and becomes the said flow passage.

3. heat abstractor as claimed in claim 2 is characterized in that: described sealing surface is formed by two side plates of being located at described radiating fin both sides.

4. heat abstractor as claimed in claim 2 is characterized in that: described sealing surface is formed by the pedestal of being located at described radiating fin bottom respectively and the top board at top.

5. heat abstractor as claimed in claim 2 is characterized in that: also be provided with a base plate between described pedestal and the radiating fin, described sealing surface is formed by this base plate of being located at the radiating fin bottom respectively and the top board at top.

6. as each described heat abstractor in the claim 2 to 5, it is characterized in that: described heat abstractor also comprises at least one heat pipe, and this heat pipe connects described pedestal and sealing surface.

7. heat abstractor as claimed in claim 2 is characterized in that: a flanging is extended in each bending of described two opposite side of described each radiating fin, and described sealing surface is formed by the flanging of described some radiating fins.

8. heat abstractor as claimed in claim 7 is characterized in that: described heat abstractor also comprises at least one heat pipe, and this heat pipe connects described pedestal and described radiating fin.

9. heat abstractor as claimed in claim 2 is characterized in that: described radiating fin two relatively part be provided with above-mentioned perforate and fin, the fin of each part extends from the homonymy of perforate, this two-part fin is and is symmetrical arranged.

10. heat abstractor as claimed in claim 2 is characterized in that: evenly be provided with above-mentioned perforate and fin on the described radiating fin, this fin all extends from the homonymy of perforate.

11. as claim 9 or 10 described heat abstractors, it is characterized in that: the angle of cut is an acute angle between described fin and described radiating fin.

12. heat abstractor as claimed in claim 11 is characterized in that: described fin is positioned at the homonymy of radiating fin.