CN201740439U

CN201740439U - Flat heat tube with scroll core

Info

Publication number: CN201740439U
Application number: CN201020262719XU
Authority: CN
Inventors: 乔治麦尔; 孙建宏; 陈介平; 谢明魁
Original assignee: Celsia Technologies Taiwan Inc
Current assignee: Celsia Technologies Taiwan Inc
Priority date: 2010-07-19
Filing date: 2010-07-19
Publication date: 2011-02-09
Anticipated expiration: 2020-07-19

Abstract

The utility model discloses a flat heat tube with a scroll core, which comprises a flat closed casing, working fluid and the scroll core. The flat closed casing is provided with smooth inner wall surfaces; the working fluid is filled inside the flat closed casing; the scroll core is arranged along the central axis of the flat closed casing to support the upper and lower inner wall surfaces of the flat closed casing; two airflow channels for the steam of the working fluid to circulate are formed between two sides of the scroll core and the left and right inner wall surfaces of the flat closed casing; the scroll core is formed by coiling a metal woven mesh at least two circles and used for the working fluid to circulate; and a backflow channel is formed at the center of the scroll core. Therefore, the scroll core serving as a capillary structure is available for the circulation of the working fluid, and the manufacture cost and time can be reduced.

Description

Flat-shaped heat pipe with scroll-type core

Technical field

The utility model refers to a kind of flat-shaped heat pipe with scroll-type core especially about a kind of heat pipe.

Background technology

Along with making rapid progress of science and technology, the power and the usefulness of electronic building brick promote day by day, also produce more heat jointly when operation; If these heats are failed timely dissipation and gone out and be accumulated in the inside of this electronic building brick, will cause the temperature of this electronic building brick to raise and influence its usefulness, even severe patient will cause this electronic building brick fault to be damaged.So industry is researched and developed various heat abstractors all the time to solve the problem of electronic building brick, heat pipe (heat pipe) is exactly a kind of very common heat abstractor.

Traditional heat pipe is hollow round tubular haply, and its inwall is laid with metal knitted net or the metal powder sintered capillary structure that forms, and fills in working fluid in the inside heat pipe space, just forms heat pipe afterwards through vacuumizing with sealing operation again.Two ends of heat pipe are divided into the evaporator section that contacts electronic heating component and away from the condensation segment of evaporator section, the heat that is positioned at the working fluid absorption electronic heating component of evaporator section can be vaporized into steam and flow to condensation segment afterwards, the steam that arrives condensation segment reverts to liquid working fluid and is back to evaporator section through heat dissipation being gone out after the heat exchange, by circulation and the liquid-gas phase transitionization of working fluid in heat pipe, just the heat of electronic heating component can be conducted to other precalculated positions.

Slimming day by day along with electronic installation, so it is bigger that height that traditional circular heat pipe is occupied and space just seem in comparison, therefore develop a kind of flat-shaped heat pipe gradually, its internal structure and traditional circular heat pipe are as good as, just its housing is made flat-shapedly to reduce occupied space on its height and the vertical direction through last extrusion process, meets the demand of slimming whereby.

Yet, the flat-shaped heat pipe of above-mentioned tradition has following problem: when housing stressed and when being crushed, the capillary structure of laying on the inner walls of flat-shaped heat pipe may break or rupture because of stressed the generation, especially the fracture situation of the capillary structure that is fired into of metal dust is even more serious, and the path that causes flowing for hydraulic fluid in the capillary structure becomes discontinuous and influences the reflux rate of working fluid; In addition, because capillary structure is laid in the internal face of housing, the steam of working fluid then flows to condensation segment along the space between housing and the capillary structure, so steam is slower than the flowing velocity on smooth surface certainly in the lip-deep flowing velocity of the rough porous of capillary structure, therefore above-mentioned capillary structure exists the problem that can't make steam flow rate reach optimization.And, in order to make capillary structure, certainly will to lay metal knitted net or metal dust, and then capillary structure is adhered on the inner walls really through firing, thus, cause expending of material cost and manufacturing process again.

The utility model content

The purpose of this utility model is to provide a kind of flat-shaped heat pipe with scroll-type core, it utilizes metal knitted net volume to circulate for working fluid as capillary structure around the scroll-type core that forms, therefore can reduce cost of manufacture and time, but a bit demand that does not influence the heat-conducting effect of flat-shaped heat pipe itself and meet slimming.

In order to reach above-mentioned purpose, the flat-shaped heat pipe that the utlity model has the scroll-type core comprises:

Flat-shaped closed shell, it has smooth internal face;

Working fluid is filled in the inside in this flat-shaped closed shell; And

Scroll-type core for this working fluid circulation, along the central axis setting of this flat-shaped closed shell to support the upper and lower internal face of this flat-shaped closed shell, form two gas channels between two sides of this scroll-type core and the left and right internal face of this flat-shaped closed shell for the steam circulation of this working fluid, this scroll-type core is made around at least two circles by metal knitted net volume, and the central authorities of this scroll-type core form the return flow line.

Described flat-shaped heat pipe has evaporator section and away from the condensation segment of this evaporator section.

Has the gap between the metal knitted net of described adjacent two circles.

Compared to prior art, the utlity model has following effect:

Because scroll-type core of the present utility model is by made and this working fluid circulation of confession around at least two circles of metal knitted net volume, in other words, characteristics of the present utility model are the usefulness of scroll-type core as capillary structure, utilize sintering processing to make the cost and the manufacturing process of capillary structure in the prior art so can remove from.

In addition, owing to form two gas channels between the left and right internal face of scroll-type core and flat-shaped closed shell for the steam circulation of this working fluid, so, the steam of working fluid mainly circulates along the smooth inner wall of flat-shaped closed shell, so its flow rate of gas can be come sooner than the traditional capillary structure by rough porous, increases the heat transfer efficiency of flat-shaped heat pipe itself whereby.

On the other hand, in traditional heat pipe, the steam of working fluid has only the single direction that flows to condensation segment from evaporator section, and often near the quantity of steam the evaporator section form one steam pressure between these two sections greater than near the quantity of steam the condensation segment poor; If it is too slow to be positioned at quantity of steam overheap or its speed that is condensed into liquid state of condensation segment, will hinders the overall flow of steam, and then influence Heat Transfer of Heat Pipe on Heat Pipe efficient; In view of this, according to the utility model, the scroll-type core is around made and its central other return flow line that forms of at least two circles by metal knitted net volume, this return flow line is back to evaporator section in order to the small part steam for the accumulation of condensation segment place, so the flowability that just can not hinder the steam flow condensation segment in the evaporator section.

Description of drawings

Fig. 1 is a flat-shaped heat pipe exploded perspective view of the present utility model.

Fig. 2 is a flat-shaped heat pipe assembled perspective view of the present utility model.

Fig. 3 is a flat-shaped heat pipe axial section of the present utility model.

Fig. 4 is a flat-shaped heat pipe lateral sectional view of the present utility model.

Fig. 5 is an operation chart of the present utility model.

The primary clustering symbol description

1 flat-shaped heat pipe 2 evaporator sections 3 condensation segments

12 times internal faces of internal face on the 10 flat-shaped closed shells 11

13 left internal face 14 right internal face 15 gas channels

16 gas channels, 20 working fluids, 30 scroll-type cores

G gap, 31 metal knitted net 32 return flow line

100 electronic heating components, 200 radiating fin groups

The specific embodiment

Relevant detailed description of the present utility model and technology contents are described as follows conjunction with figs., yet appended accompanying drawing purposes as an illustration only is not to be used to limit to the utility model.

As shown in Figure 5, has the flat-shaped heat pipe 1 (being designated hereinafter simply as flat-shaped heat pipe 1) of scroll-type core in the utility model, in order to electronic heating component 100 is carried out heat conduction.As shown in Figure 4, the structure of this flat-shaped heat pipe 1 is formed and to be comprised: flat-shaped closed shell 10, working fluid 20 (among the figure shown in the dotted line), and scroll-type core 30.Operating characteristic during just actual the heat transfer, as shown in Figure 5, flat-shaped heat pipe 1 can be divided into the evaporator section 2 of thermo-contact electronic heating component 100 and away from the condensation segment 3 of this evaporator section 2.

Flat-shaped closed shell 10 is made for the metal material with thermal conductive resin, and it has smooth internal face, and internal face is not provided with any groove; For convenience of explanation, in embodiment of the present utility model, the internal face of flat-shaped closed shell 10 is divided into internal face 11, internal face 12, left internal face 13 and right internal face 14 down according to the central axial direction of flat-shaped heat pipe 1.

Working fluid 20 is filled in the inside of flat-shaped closed shell 10, utilize the vapour-liquid phase circulation change of working fluid 20 in flat-shaped closed shell 10, flat-shaped heat pipe 1 can be gone out the heat sustained delivery that electronic heating component 100 is produced, and will describe in detail after a while as for the vapour-liquid phase heat transfer mechanism of working fluid 20.

As shown in Figure 3, scroll-type core 30 along the central axis setting of flat-shaped closed shell 10 to support the upper and lower internal face 11 and 12 of flat-shaped closed shell 10, as shown in Figure 4, this is because its compression strength of central axis position of flat-shaped heat pipe 1 is low than two sides, so scroll-type core 30 is arranged on the support effect that the central axis place can provide part, caves in because of external force with the central part that prevents flat-shaped heat pipe 1.

Then form two

gas channels

15 and 16 between two sides of scroll-type core 30 and the left and right internal face 13 and 14 of flat-shaped closed shell 10, use steam to flow to condensation segment 3, shown in dotted arrow among Fig. 5 from evaporator section 2 for working fluid 20; Because the main circulation path of steam along the smooth inner wall face of flat-shaped closed shell 10, so tradition is faster along the rough porous surface of capillary structure for the steam flowing velocity, promotes the heat transfer efficiency of flat-shaped heat pipe 1 whereby.

Scroll-type core 30 is made for working fluid 20 circulations by metal knitted net 31 coilings at least two circles, can know from Fig. 4 and to find out, scroll-type core 30 is to be formed by metal knitted net 31 coilings three circles, and have clearance G and be not to fit tightly together between the metal knitted net 31 of adjacent two circles, the clearance G between the metal knitted net 31 of every circle can provide the steam of the working fluid 20 of small part to be back to the usefulness of evaporator section 2 from condensation segment 3.

What specify is, according to the utility model, the central authorities of scroll-type core 30 are formed with return flow line 32 but not solid core, the main application of this return flow line 32 is to allow the small part steam of working fluid 20 be back to evaporator section 2 from condensation segment 3, shown in the arrow of Fig. 5 central authorities, influence the flowability of whole steam to reduce steam too much to accumulate on the condensation segment 3.

As shown in Figure 5, practical operation principle of the present utility model below will be described.The evaporator section 2 thermo-contact electronic heating components 100 of flat-shaped heat pipe 1, near this moment evaporator section 2 working fluids 20 just absorb the heat of electronic heating component 100 and vaporize and become steam, these steam utilize between the left and right internal face 13 and 14 of two sides of scroll-type core 30 and flat-shaped closed shell 10 formed

gas channel

15 and 16 and along the fast flow speed and direction condensation segment 3 of the smooth inner wall face of flat-shaped closed shell 10 respectively, therefore can increase the steam flow rate of working fluid 20, and reach higher heat-transfer effect.

Condensation segment 3 outsides of flat-shaped heat pipe 1 can connect radiating fin group 200 in addition, are emitted to the external world in order to the heat with condensation segment 3; When if the steam in the condensation segment 3 makes steam be deposited in condensation segment 3 because of the speed that is condensed into liquid slowly, then the steam that can nature forces the part that is positioned at condensation segment 3 from the steam pressure of evaporator section 2 is along the return flow line 32 and be back to evaporator section 2, prevents whereby that steam from too much accumulating on condensation segment 3 and the flowability that hinders whole steam.

Therefore, compared to prior art, the utlity model has following effect:

Because scroll core 30 of the present utility model is made by metal net coiling at least two circles and supplies working fluid 20 circulations, in other words, characteristics of the present utility model are scroll core 30 as the usefulness of capillary structure, so can remove cost and the manufacturing process of making capillary structure in the prior art with sintering processing from.

In addition, owing to form two

gas channels

15 and 16 for the steam circulation of working fluid 20 between the left and right internal face 11 and 12 of scroll core 30 and flat-shaped closed shell 10, so, the steam of working fluid 20 mainly circulates along the smooth inner wall of flat-shaped closed shell 10, so its flow rate of gas can be come sooner than the traditional capillary structure by rough porous, increases whereby the heat transfer efficiency of Flat heat tube 1.

On the other hand, in traditional heat pipe, the steam of working fluid only has the single direction that flows to condensation segment from evaporator section, and often near the quantity of steam the evaporator section form steam pressure between these two sections greater than near the quantity of steam the condensation segment poor; If it is too slow that the quantity of steam overheap of condensation segment or its are condensed into liquid speed, the overall flow that will hinder steam; In view of this, according to the utility model, scroll core 30 is by made and its central other return flow line 32 that forms of metal net coiling at least two circles, this return flow line 32 is back to evaporator section 2 in order to the steam for the accumulation of condensation segment 3 places, the flowability that so just can not hinder the steam flow condensation segment 3 in the evaporator section 2.

Claims

1. the flat-shaped heat pipe with scroll-type core is characterized in that, comprising:

Flat-shaped closed shell, it has smooth internal face;

Working fluid is filled in the inside in this flat-shaped closed shell; And

2. the flat-shaped heat pipe with scroll-type core as claimed in claim 1 is characterized in that, described flat-shaped heat pipe has evaporator section and away from the condensation segment of this evaporator section.

3. the flat-shaped heat pipe with scroll-type core as claimed in claim 2 is characterized in that, has the gap between the metal knitted net of described adjacent two circles.