CN201053839Y

CN201053839Y - Sintering type heat pipe

Info

Publication number: CN201053839Y
Application number: CNU2007201422275U
Authority: CN
Inventors: 李克勤; 杨成诫; 钟蜀龙; 陈其亮; 高志忠
Original assignee: Zhongshan Weiqiang Technology Co Ltd
Current assignee: Zhongshan Weiqiang Technology Co Ltd
Priority date: 2007-04-10
Filing date: 2007-04-10
Publication date: 2008-04-30
Anticipated expiration: 2017-04-10

Abstract

The utility model discloses a sintered heat tube which comprises a metal tube body, a groove which is arranged on the tube body, and metal powder. The groove is arranged along the axial direction of the inner side wall of the tube body. Metal powder is sintered on the convex surface of the groove, and no metal powder is sintered on the bottom surface of the tube body. The structure of the utility model is simple, the maximum refluxing quantity of the liquid refluxing in the heat tube can be improved and the heat exchanging area of the gas-liquid interface can be increased, the flowing resistance can be reduced when the liquid in the heat pipe reflows, and the heat transferring ability of the heat tube is improved.

Description

Sintered heat pipe

Technical field

The utility model relates to a kind of heat pipe, relates in particular to a kind of compound sintered heat pipe.

Background technology

The thermal source of electronic component is mainly from wafer itself, as long as energising uses, then produces heat because of the resistance of wafer itself and the electric current of circulation.Along with the continuous downsizing of integrated circuit manufacture process, increasing function is incorporated on the single wafer, data such as multi-medium data and the 3D animation etc. of handling computing respectively by the polycrystalline sheet also were incorporated on the same wafer in the past, and the heat on the wafer is also along with increasing and more concentrated comparatively speaking.Gently then make heavy this electronic component that then burns of its lost of life if fail in time with this thermal source heat radiation then no matter all can cause some influences to electronic component or electric crystal.Heat pipe is often by the main heat transfer element of utilization for the heat radiation module, its structure is mainly the metal tube of certain vacuum degree, and in the inside of metal tube the paced work medium is arranged, the capillaries fabricated that pipe internal surface has groove shape and powder sintered back and tube wall to fit respectively.Mainly be according to Transformation Principle, a large amount of heat energy is transferred to condensation end by evaporation ends.

The utility model content

In order to overcome defective of the prior art, the purpose of this utility model provides and a kind ofly can promote heat pipe two phase flow speed, to promote a kind of porous sintered heat pipe of adopting heat pipes for heat transfer ability.

To achieve these goals, the technical solution of the utility model is to realize like this, a kind of sintered heat pipe, comprise the metal body, be arranged on groove and metal dust on the body, described groove axially is provided with along the body madial wall, metal powder sintered on the nonreentrant surface of groove, the pipe bottom face does not have sintering metal powder.

The axial groove of described edge pipe madial wall is at least one, and described groove evenly distributes along the body madial wall.

The packed height of described metal dust is less than the height of metal tube.

The particle diameter of described metal dust is more than or equal to groove concave surface diameter.

The thickness of the metal dust of described sintering on metal body inner wall trench nonreentrant surface is inequality, and thick metal dust is more than the 0.1mm with the thickness difference of the metal dust that approaches.

Described metal tube can be copper pipe, aluminum pipe or steel pipe.

The cross sectional shape of described groove can be any regular or irregularly shaped.

The metal dust of described filling can be copper powder, aluminium powder, nickel powder or nano-carbon powder.

The preparation method of the utility model sintered heat pipe may further comprise the steps:

1, in axial direction offers groove at the madial wall of metal tube;

2, insert plug in metal tube inner hollow portion;

3, in the gap of plug and inner wall of metal tube, insert diameter greater than the metal dust of groove concave surface diameter and carry out sintering;

4, after sintering is finished plug is extracted out, inner wall of metal tube adheres to the porous capillary structure;

5, then reducing is carried out in the body upper end;

6, after reducing is finished liquid is injected, vacuumize then, utilize anchor clamps to seal, weld.

For the plug that inserts in the step 2, this plug can be the diameter unanimity, or different two plugs of diameter or a brace plug that the thickness different-diameter is arranged, at first insert the bigger plug of diameter and fill out powder formula sintering, insert the less plug of diameter again and fill out powder formula sintering, perhaps inserting a brace has the plug of thickness different-diameter to fill out powder again, and the total height of filling out powder formula sintering is lower than the height of metal tube.

Compared with prior art, the beneficial effects of the utility model are:

1, can promote heat pipe gas-liquid two-phase exchange velocity, to promote a kind of porous sintered heat pipe of adopting heat pipes for heat transfer ability.

2, preparation method of the present utility model adopts coarse grained powder, makes powder not fall in the groove, can keep the water yield in the groove more, and also can change the diameter of plug, reaches the thickness of different sintering capillary structures.

3, the utility model preparation method is carried out sintered powder on the surface of the trench top of a certain section height, has the many advantages of the groove water yield, has the big advantage of sintering structure capillary force again, and one section of sintered powder is used for the thermal treatment zone.This preparation method can effectively improve the heat pipe effective utilization.

Description of drawings

Fig. 1 is the utility model heat pipe structure schematic diagram.

Fig. 2 for the A-A of Fig. 1 to cuing open figure.

Fig. 3 is the another kind of structural representation of the utility model heat pipe.

Fig. 4 is another structural representation of the utility model heat pipe.

Fig. 5 is an A-B section partial enlarged drawing among Fig. 4.

Fig. 6 is another structural representation of the utility model heat pipe.

Fig. 7 for the A-A of Fig. 6 to cuing open figure.

Fig. 8 is a sintered heat pipe preparation method flow chart.

The accompanying drawing sign

1-body 2-groove 3-metal dust 4-plug 5-manages bottom face

The specific embodiment

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, but not as to qualification of the present utility model.

Embodiment one:

As Fig. 6, sintered heat pipe shown in Figure 7, comprise metal body 1, inboard wall of tube body groove 2 and the formed capillary structure of lip-deep metal dust 3 sintering of inboard wall of tube body vertically, the particle diameter of described metal dust 3 is more than or equal to groove 2 concave surface diameters, metal dust 3 is sintered on the nonreentrant surface of groove 2, and pipe bottom face 5 non sintered metal powder, cool off on body 1 top after body 1 bottom absorbs the vaporizing liquid of a large amount of heats like this, the liquid of cooling flows along groove 2.

In order to make liquid in pipe reach good flow effect, described can be along the axial groove 2 of inside pipe wall for a plurality of.

Described metal body 1 is the pipe that can reach any material of heat sinking function, preferred copper pipe, aluminum pipe or steel pipe.

The shape in the cross section of described groove 2 can be triangle, any regular or irregularly shaped such as trapezoidal, square.

The metal dust 3 of described filling can be copper powder, aluminium powder, nickel powder or nano-carbon powder.

Embodiment two:

As shown in Figure 1 to Figure 3, the packed height of described metal dust 3 is less than the height of metal body 1.There is one section body, 1 non sintered metal powder 3 part that is described body 1, and the ratio of the height of non sintered metal powder 3 part bodys 1 and body 1 total height can be any ratio.

Embodiment three:

As Fig. 4, shown in Figure 5, sintered heat pipe, comprise metal body 1, inboard wall of tube body groove 2 and the formed capillary structure of lip-deep metal dust 3 sintering of inboard wall of tube body vertically, the particle diameter of described metal dust 3 is more than or equal to groove 2 concave surface diameters, metal dust 3 is sintered on the nonreentrant surface of groove 2, and pipe bottom face 5 non sintered metal powder 3, the metal dust 3 of sintering is different with the thickness of hypomere at body 1 epimere.

Embodiment four:

The preparation method of sintered heat pipe is described below:

As shown in Figure 8, at first, in axial direction offer groove 2 at the madial wall of metal body 1;

Insert plug 4 in metal body 1 inner hollow portion; In the gap of plug 4 and inner wall of metal tube, insert diameter greater than the metal dust 3 of groove 2 concave surface diameters and carry out sintering, metal tube bottom face 5 no sintering metal powders 3; The packed height of metal dust 3 can be selected as required;

After sintering is finished plug 4 is extracted out, metal body 1 inwall adheres to the porous capillary structure;

After sintering is intact reducing is carried out on body 1 top; After reducing is finished liquid is injected, vacuumize then, utilize anchor clamps to seal, weld.So just finished the making of a heat pipe.

Embodiment five:

If the thickness difference of metal dust 3 on tube wall in the body 1, as shown in Figure 3, Figure 4, when carrying out the making of heat pipe again, at first in body 1, insert the less plug 4 of diameter, fill out powder formula sintering, insert the bigger plug of diameter again and fill out powder formula sintering, all the other steps are identical with embodiment four.

Claims

1. a sintered heat pipe comprises the metal body, is arranged on groove and metal dust on the body, it is characterized in that described groove axially is provided with along the body madial wall, and is metal powder sintered on the nonreentrant surface of groove, and the pipe bottom face does not have sintering metal powder.

2. sintered heat pipe according to claim 1 is characterized in that, the axial groove of described edge pipe madial wall is at least one.

3. sintered heat pipe according to claim 1 is characterized in that described groove evenly distributes along the body madial wall.

4. sintered heat pipe according to claim 1 is characterized in that the packed height of described metal dust is less than the height of metal tube.

5. sintered heat pipe according to claim 1 is characterized in that, the particle diameter of described metal dust is more than or equal to groove concave surface diameter.

6. sintered heat pipe according to claim 1 is characterized in that, the thickness of the metal dust of described sintering on metal body inner wall trench nonreentrant surface is inequality, and thick metal dust is more than the 0.1mm with the thickness difference of the metal dust that approaches.

7. sintered heat pipe according to claim 1 is characterized in that, described metal tube is copper pipe, aluminum pipe or steel pipe.

8. sintered heat pipe according to claim 1 is characterized in that, the metal dust of described filling is copper powder, aluminium powder, nickel powder or nano-carbon powder.