TWI440813B - Thin forming composite capillary structure, its forming method and its application - Google Patents

Description

Thinned composite capillary structure, molding method thereof and application thereof

The present invention relates to a capillary structure, and more particularly to an innovative designer of the structure, molding method and application of a composite capillary structure.

According to the conventional heat pipe structure design, in order to achieve better heat transfer efficiency, a composite capillary structure type is introduced. However, the conventional composite capillary structure can certainly benefit the heat transfer efficiency of the heat pipe, but with the heat pipe space type Different, there are still some problems that need to be improved.

In order to cope with the current trend of thin and light design of computers and electronic devices, the heat pipe structure must be thinned and miniaturized. However, the composite capillary structure originally installed in the inner space of the heat pipe will be generated. Some problems, Gayne, the composite capillary structure in the conventional heat pipe, in terms of the process surface, the part of the powder sintered body usually needs to be inserted into the heat pipe space as a fixture by a mandrel, and then the mandrel and the heat pipe are used. The gap between the wall of the pipe is filled with metal powder and then sintered and shaped. However, this kind of conventional structural form has found that the metal powder cannot meet the requirements of thinning state, because the gap is too small during the filling process. It is difficult to achieve, and as the length of the heat pipe is longer, there is also a problem that the powder is difficult to be compacted, and once the thickness of the powder sintered body is too thick, the problem of insufficient vapor flow space is caused, and this problem is in the heat pipe. The cross-sectional area is not sufficient to be highlighted, but as the cross-sectional area of the heat pipe is reduced to a small extent, the cross section of the powder sintered body is occupied. Ratio is relatively large, the lack of vapor flow channel space problem i.e. highlight out, difficult to improve and overcome.

Another problem with the conventional heat pipe composite capillary structure is that once the powder sintered body and the mesh body are sintered and fixed in the heat pipe space, the flexibility is almost lost, so that when the heat pipe is required to be pressed into a flat pipe according to the demand. In the case of a curved pipe type, the composite capillary structure corresponding to the tortuous portion of the pipe wall is often difficult to produce a consistently curved state, causing the phenomenon that the composite capillary structure and the heat pipe wall are separated from each other, and this phenomenon will simultaneously The situation that the steam flow channel space is blocked and blocked, thereby seriously affecting the flow smoothness of the vaporization state of the working fluid, and the heat dissipation performance of the heat pipe is greatly reduced.

Therefore, in view of the problems existing in the above-mentioned conventional heat pipe composite capillary structure, how to develop an innovative design that can be more ideal and practical, the relevant industry must further consider the goal and direction of breakthrough.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a composite capillary structure, a molding method thereof and an application thereof, and the problem to be solved is to innovate for the purpose of developing a new type of heat pipe composite capillary structure which is more ideal and practical. Thinking about the breakthrough; the technical feature of the invention solves the problem, in terms of the structure of the thinned composite capillary structure, mainly comprises: a metal mesh body, a planar network shape composed of a longitudinally and horizontally woven interlaced unit metal wire, The metal mesh body comprises two side surfaces; the powder sintered layer is fixed on at least one side surface of the metal mesh body by sintering the metal powder, and the powder sintered layer has a thickness of between 0.1 mm and 0.7 mm; wherein the metal The total thickness of the thinned composite capillary structure formed by the co-construction of the mesh body and the powder sintered layer is a thin thickness profile of 0.2 mm to 0.8 mm; and the metal mesh body and the powder sintered layer are co-constructed The formed thinned composite capillary structure still has flexible properties; in terms of the forming method of the thinned composite capillary structure, the method mainly comprises: separately preparing a metal mesh body and supplying the same Metal powder used; a liquid medium adhered to the surface of the metal mesh by means of spraying, brushing or dipping; and the metal powder to be sintered is uniformly distributed on the surface of the metal mesh by the liquid medium; The method comprises sintering and fixing the metal powder adhered to the surface of the metal mesh body to form a powder sintered layer having a thickness of between 0.1 mm and 0.7 mm on the surface of the metal mesh body.

Another main object of the present invention is to further provide a structural form of applying the thinned composite capillary structure to a heat pipe, which is a hollow closed tubular body type sealed at two ends, and is accommodated in the inner space thereof. A working fluid is provided to allow the thinned composite capillary structure of the pre-sintered metal powder to be disposed in the internal space.

With this innovative and unique design, the present invention can achieve the following advantages as compared with the prior art:

First, the cross-sectional area of the heat pipe vapor flow channel can be further expanded to increase the vapor flow efficiency of the heat pipe.

Secondly, the ultra-thin thickness type and the flexible property of the thinned composite capillary structure of the present invention are between 0.2 mm and 0.8 mm, which is more conducive to the bending of the tube wall and the composite capillary structure and the heat pipe. Ability to maintain excellent bonding.

Thirdly, the present invention utilizes a liquid medium to first adhere the metal powder to the surface of the metal mesh body and then fixes the fixed molding method, and the crucible can achieve the advantages of easy manufacturing and obtaining a thinned powder sintered layer structure.

Please refer to the first and second figures, which are preferred embodiments of the composite capillary structure of the present invention, the molding method thereof and the application thereof, but the embodiments are for illustrative purposes only, and are not applicable to the patent application. First, in terms of the structural surface of the thinned composite capillary structure A, the following structure is included: a metal mesh body 10, which is a planar mesh type formed by the longitudinally and horizontally knitted interdigitated unit metal wires 11. The metal mesh body 10 includes two side surfaces; at least one powder sintered layer 20 is sintered and fixed to at least one side surface of the metal mesh body 10 by metal powder 21 (as shown in FIG. 2; Shown is the embodiment in which the metal powder 21 is sintered on both sides, and the thickness W1 of the powder sintered layer 20 is between 0.1 mm and 0.7 mm (as shown in FIG. 2); As shown in the figure, the total thickness of the thinned composite capillary structure A formed by the co-construction of the metal mesh body 10 and the powder sintered layer 20 is a thin thickness W2 type of 0.2 mm to 0.8 mm; The thinned composite capillary structure A formed by the coexistence of the metal mesh body 10 and the powder sintered layer 20 is still flexible. characteristic.

Next, as shown in FIGS. 4 and 5, in terms of the molding method of the thinned composite capillary structure A, the following steps are included:

A, preparing a metal mesh body 10;

B, preparing a metal powder 21 for sintering;

C, by spraying or brushing or dipping (as shown in Figure 13) means attached to a liquid medium 30 on at least one side of the surface of the metal mesh 10;

D, using the liquid medium 30 to adhere the powder 21 to be sintered in a uniformly distributed state to at least one side surface of the metal mesh body 10;

E. The metal powder 21 adhered to the surface of the metal mesh body 10 is sintered and fixed to the surface of the metal mesh body 10 by a sintering means to form a thickness of at least one side of the metal mesh body 10 to a thickness of 0.1 mm to 0.7. A powder sintered layer 20 between mm.

Wherein, the liquid medium 30 can be selected from water or an adhesive or an organic solvent (such as methanol, ethanol, acetone, etc.).

As shown in Fig. 5, in the case where the sintering means is carried out, the jig 40 (or a mold or a pressurizing means) is additionally used, whereby the bonding and flatness of the powder sintered layer 20 can be increased.

As shown in Fig. 6, the thinned composite capillary structure A of the present invention is particularly suitable for use as a capillary structure in the product structure of the heat pipe 03, and the heat pipe 03 is a hollow closed tubular body type sealed at two ends. The working space is accommodated in the internal space 032, and the thinned composite capillary structure A in which the metal powder 21 is pre-sintered is disposed in the internal space 032.

As shown in Figures 7, 8, 9, and 10, wherein the heat pipe 03 wall section profile can be circular or flat or a combination of a circular shape and a flat shape.

As shown in the figures 7, 8, 9, and 10, wherein the thinned composite capillary structure A is disposed in a whole circumference area, a section or a partial area, and a section of the heat pipe 03 wall 031 Type.

Wherein, the thinned composite capillary structure A can be sintered and fixed with the heat pipe 03 wall 031.

As shown in Figures 11 and 12, the combination of the thinned composite capillary group A and the heat pipe 03 includes the following:

A. One end of the heat pipe 03 is first sealed, and the other end is provided with an opening;

B, preparing an introduction mandrel 04 for insertion from the opening into the inner space of the heat pipe 03 032;

C, the thinned composite capillary structure A depends on or is placed against the introduction mandrel 04;

D, the action of the introduction of the mandrel 04 into the inner space 032 of the heat pipe 03, to bring the thinned composite capillary structure A into the inner space of the heat pipe 03 032;

E, using the introduction mandrel 04 to the thinned composite capillary structure A against the heat pipe 03 wall 031;

F. The introduced mandrel 04 is taken out, whereby the thinned composite capillary structure A is placed in the inner space 032 of the heat pipe 03.

Wherein, after the introduction of the mandrel to the thinned composite capillary structure A against the heat pipe 03 wall 031, a sintering step may be further included to make the thinned composite capillary structure A and the heat pipe 03 wall 031 Combined with fixation.

Advantages of the invention:

1. The composite capillary structure composed of a metal mesh body and a powder sintered layer and having a total thickness of 0.2 mm to 0.8 mm, which is applied by the invention, is applied to the ultrathin thickness profile and the flexible property. When the heat pipe product structure is constructed, the cross-sectional area of the heat pipe vapor flow passage can be further expanded to increase the vapor flow efficiency of the heat pipe.

2. The ultra-thin thickness profile and the flexible property of the thinned composite capillary structure of the invention between 0.2 mm and 0.8 mm are more favorable for the tortuous processing of the tube wall, so that the composite capillary structure and the heat pipe can be Maintain excellent bonding.

3. The invention utilizes a liquid medium to first adhere the metal powder to the surface of the metal mesh body and then fixes and fixes the molding method, and the crucible can achieve the advantages of easy manufacturing and obtaining a thinned powder sintered layer structure.

The above embodiments are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention. The principles are changed and modified to achieve an equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

A. . . Thinned composite capillary structure

03. . . Heat pipe

031. . . Wall

032. . . Internal space

04. . . Import mandrel

10. . . Metal mesh

11. . . metal wires

20. . . Powder sintered layer

twenty one. . . mineral powder

30. . . Liquid medium

40. . . Fixture

Fig. 1 is an exploded perspective view of the thinned composite capillary structure of the present invention.

Fig. 2 is a cross-sectional structural view of an embodiment of the thinned composite capillary structure of the present invention.

Fig. 3 is a cross-sectional structural view of an embodiment of the thinned composite capillary structure of the present invention.

Figure 4: A method of forming a thinned composite capillary structure of the present invention.

Fig. 5 is a schematic view showing a molding method of the thinned composite capillary structure of the present invention.

Figure 6 is a schematic view showing the distribution of the thinned composite capillary structure of the present invention on the wall of the heat pipe.

Figure 7 is a schematic view showing the distribution of the thinned composite capillary structure of the present invention on the wall of the heat pipe.

Figure 8 is a schematic view showing the distribution of the thinned composite capillary structure of the present invention on the wall of the heat pipe.

Figure 9 is a schematic view showing the distribution of the thinned composite capillary structure of the present invention on the wall of the heat pipe.

Fig. 10 is a schematic view showing the distribution area of the thinned composite capillary structure of the present invention on the wall of the heat pipe.

Figure 11: The step of combining the thinned composite capillary structure of the present invention with a heat pipe.

Fig. 12 is a schematic view showing the steps of combining the thinned composite capillary structure and the heat pipe of the present invention.

Fig. 13 is a view showing another embodiment of the metal powder adhering manner of the thinned composite capillary structure of the present invention.

A. . . Thinned composite capillary structure

10. . . Metal mesh

11. . . metal wires

20. . . Powder sintered layer

twenty one. . . mineral powder

W1, W2. . . thickness

Claims (10)

A thinned composite capillary structure refers to a thinned composite capillary structure that has not been placed in the inner space of the heat pipe, and includes: a metal mesh body, which is a planar network type composed of a unit metal wire interlaced by a longitudinal and horizontal weave. The metal mesh body includes two side surfaces; at least one powder sintered layer is fixed to at least one side surface of the metal mesh body by sintering of metal powder, and the thickness of the powder sintered layer is between 0.1 mm and 0.7 mm. Wherein the total thickness of the thinned composite capillary structure co-constructed by the metal mesh body and the powder sintered layer is a thin thickness profile of 0.2 mm to 0.8 mm; and wherein the metal mesh body and The thinned composite capillary structure formed by the co-conformation of the powder sintered layer still has the flexible property; and the powder sintered layer is adhered to the uniform distribution of the metal powder to be sintered by a liquid medium before sintering. The metal powder is sintered and fixed on at least one side surface of the metal mesh body. A method for forming a thinned composite capillary structure, in particular, a method for forming a thinned composite capillary structure having a total thickness of between 0.2 mm and 0.8 mm and having flexible properties, comprising: preparing a metal mesh; And preparing a metal powder for sintering; attaching a liquid medium to at least one surface of the metal mesh by spraying or brushing or dipping; and using the liquid medium to adhere the metal powder to be sintered in a uniform distribution state On at least one side surface of the metal mesh body; the metal powder adhered to the surface of the metal mesh body is sintered and fixed by a sintering means to form a thickness of at least one side of the metal mesh body to a thickness of 0.1 mm to 0.7 mm. A sintered layer between the powders. The method for forming a thinned composite capillary structure according to the second aspect of the patent application, wherein the liquid medium is selected from water or an adhesive or an organic solvent. The method for molding a thinned composite capillary structure according to the second aspect of the patent application, wherein the sintering means is further supplemented by a jig or a mold or a pressurizing means to increase the bonding property of the sintered powder layer. With flatness. A heat pipe, which is combined with the thinned composite capillary structure according to claim 1, wherein the heat pipe is a hollow closed tubular body shape sealed at two ends, and a working liquid is accommodated in the inner space, and the pre-sintering A thinned composite capillary structure having a metal powder is disposed in the internal space. According to the heat pipe of claim 5, wherein the heat pipe wall section profile is circular or flat or a combination of a circular shape and a flat shape. The heat pipe according to claim 5, wherein the thinned composite capillary structure is disposed in a shape of a whole circumference region, a segment or a partial region, and a segment of the heat pipe wall. The heat pipe according to claim 5, wherein the thinned composite capillary structure is in a sintered fixed state with the heat pipe wall. The heat pipe according to claim 5, wherein the step of combining the thinned composite capillary structure with the heat pipe comprises: first sealing one end of the heat pipe and leaving an opening at the other end; preparing an introduction mandrel to Inserting the opening into the inner space of the heat pipe; relying on or enclosing the thinned composite capillary structure against the introduction mandrel; and inserting the introduction mandrel into the inner space of the heat pipe to make the thin shape The composite capillary structure is brought into the inner space of the heat pipe; the thinned composite capillary structure is pressed against the heat pipe wall by the introduction mandrel; The introduction mandrel is taken out, whereby the thinned composite capillary structure is placed in the inner space of the heat pipe. The heat pipe according to claim 9, wherein the introduction mandrel further comprises a sintering step after the thinned composite capillary structure is pressed against the heat pipe wall to make the thinned composite capillary structure and the heat pipe. The tube wall is fixed and fixed.