TWI458930B - Heat pipe construction and its preparation method for controlling the location of capillary structure sintering - Google Patents

Description

Heat pipe structure capable of controlling the sintering position of capillary structure and preparation method thereof

The invention relates to a heat pipe structure and a preparation method thereof; in particular to a method capable of controlling the sintering position of the capillary structure and having the space of augmenting the vapor flow path, facilitating the bending process of the pipe wall, making it easier to manufacture and improving the vaporization efficiency of the working fluid, etc. Many practical and progressive innovative designers.

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. When the cross-sectional area is sufficient, it does not stand out, but as the cross-sectional area of the heat pipe is reduced to a certain extent, The ratio of the cross-sectional area occupied by the powder sintered body is relatively large, and the problem that the vapor flow path space is insufficient is highlighted, and it is difficult to improve the overcoming.

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.

On the other hand, another problem in the design of the conventional heat pipe structure is that it is difficult to control the position of the internal capillary structure during sintering because the internal capillary structure is metal powder or The net body, when it is intended to be sintered in the heat pipe, is often difficult to accurately control and has serious problems of offset and error, so that the configuration can only be set for the full segment type, if it is intended for the local segment. As a limited setting, there are technical bottlenecks and difficulties that still need to be broken. This is an important issue for the relevant industry to think about again.

Therefore, in view of the problems in the above-mentioned conventional heat pipe structure and the application of the method, how to develop an innovative structure and method that can be more ideal and practical, and the relevant industry should 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 heat pipe structure capable of controlling the sintering position of a capillary structure and a manufacturing method thereof, and the problem to be solved is to aim at how to develop a new heat pipe structure and a manufacturing method which are more ideal and practical. Considering the technical breakthrough of the problem, the structural part is mainly composed of an evaporation section sintered capillary structure in the evaporation section of the pipe body, which is composed of at least a metal powder sintered and fixed on the inner wall of the evaporation section; A net-sintered composite capillary structure in a form of a set is formed in a condensation section of the pipe body, and comprises a metal mesh body and a powder sintered layer, and the metal mesh system is composed of a vertical and horizontal braided interdigitated unit metal wire. The planar mesh type, the metal mesh body comprises two side surfaces, the powder sintered layer is pre-sintered and fixed to at least one surface of the metal mesh body by metal powder, and the mesh sintered composite capillary structure is placed In the inner space of the pipe body, the sintered composite capillary structure of the net body has flexibility characteristics when not placed in the inner space of the pipe body, and the net body is burned The composite capillary structure is placed in the tube body and can be flexibly deformed according to the bending process of the tube wall; and the evaporation section is sintered at one end of the capillary structure and is provided with a powder limit net body and the net body sintered composite The capillary structure is joined, lapped or joined to serve as a limiting member for filling the metal powder.

In terms of the manufacturing method, a pipe body is mainly prepared, one end of the pipe body is first sealed, and the other end is provided with an opening to communicate the inner space of the pipe body; and another mesh body sintered composite capillary structure is set up, Forming a powder sintered layer by pre-sintering and fixing the metal powder on the surface of a metal mesh body; then taking a core rod; and pressing the mesh sintered composite capillary structure against the core rod, and using a powder limit network body The ring is placed against the mandrel to make the net body sinter The capillary structure is positioned against the state of the mandrel; the mandrel is inserted into the inner space of the pipe body to synchronously introduce the mesh sintered composite capillary structure into the inner space of the pipe body together with the powder limit net body, and The mesh sintered composite capillary structure corresponds at least to a predetermined condensation section position of the pipe body, and the powder limit net body corresponds to a boundary position between the predetermined condensation section and the evaporation section of the pipe body; and the powder limit net body is used as a filling The bottom limit member of the powder is filled with metal powder by the opening of the tube body to be sintered and shaped to form the sintered capillary structure of the evaporation section; then the core rod is extracted, and the opening of the tube body is passed through the working body for infusion and vacuum process, and the sealing is repeated. The opening is made into a heat pipe.

With this innovative and unique design, the present invention can achieve the precise control of the capillary structure sintering position and the expansion of the vapor flow channel space, which is more conducive to the tube wall curvature processing and easier to manufacture. And to improve the practical fluidity of the working fluid vaporization efficiency and better industrial utilization benefits.

Please refer to FIGS. 1 to 5, which are preferred embodiments of the heat pipe structure and the manufacturing method thereof for controlling the sintering position of the capillary structure of the present invention, but the embodiments are for illustrative purposes only, and are not applicable to the patent application. Structural limitation; firstly, in terms of structural plane, the heat pipe A structure comprises the following structure: a pipe body 10, which is a hollow closed pipe type having two sealing ends 11, which is divided into evaporation according to heat dissipation. The segment 12 and the condensing section 13 are further in a vacuumed state and housed with a working fluid 15 (only shown in FIG. 1); an evaporation section sinters the capillary structure 20, which is disposed on the tube body 10. Evaporation section 12 , at least the metal powder 40 is sintered and fixed on the inner wall of the evaporation section 12; one of the mesh type sintered composite capillary structures 30 is placed in the condensation section 13 of the pipe body 10, including a The metal mesh body 31 and at least one powder sintered layer 32 are formed, wherein a more detailed structure is as shown in FIG. 5, and the metal mesh body 31 is a planar mesh type formed by longitudinally and transversely knitted interdigitated unit metal wires 311. The metal mesh body 31 includes two side surfaces. The powder sintered layer 32 is pre-sintered and fixed to at least one surface of the metal mesh body 31 by the metal powder 40, and the mesh sintered composite capillary structure 30 is placed. Into the inner space 14 of the pipe body 10; and the mesh sintered composite capillary structure 30 has a flexible property when not placed in the inner space of the pipe body 10, and the meshed composite composite capillary structure 30 is placed and positioned After the pipe body 10, the flexural deformation can be caused by the pipe wall bending process; a powder limiting net body 50 is disposed at one end of the sintered capillary structure 20 of the evaporating section, and the sintered composite capillary structure with the net body 30-phase connection, lap or articulation Condensing section 13 of the cooling fluid 15 delivered to the evaporator section 12; 50 mesh limit of the powder may be less than a cyclic or cyclic patterns for patterns like those of C.

The powder sintered layer 32 as shown in Fig. 5 is an embodiment of the surface of the metal mesh body 31; and the powder sintered layer 32 shown in Fig. 6 is provided on the metal mesh body. 31 The implementation of the opposite side surfaces, which is a specific implementation for the present creation.

As shown in FIG. 5, the mesh sintered composite capillary structure 30 in which the sintered capillary structure 20 is joined, overlapped or joined to the evaporation section has a powder sintered layer 32 thickness W1 between 0.1 mm and 0.7 mm. The total thickness W2 of the sintered composite capillary structure 30 of the mesh body is between 0.2 mm and 0.8 mm. The thin thickness profile between them.

As shown in Fig. 7, the mesh-composited composite capillary structure 30 is more in a sintered state with the tubular body 10 (for example, the portion indicated by each arrow L1 is a sintered fixed portion).

Wherein, the powder limiting net body 50 is formed into a form of being separately wrapped on the outer side of the sintered composite capillary structure 30 of the net body, or a form in which the sintered composite capillary structure 30 of the net body is directly protruded and formed. (such as wing flakes).

As shown in FIG. 1 , the evaporation section sintered capillary structure 20 is formed by directly extending one end of the mesh sintered composite capillary structure 30 to the evaporation section 12 , and the mesh sintered composite capillary structure 30 is partially In the side distribution pattern, the sintered capillary structure 20 of the evaporation section is not formed by the extension of the mesh sintered composite capillary structure 30, and the side is compensated by the sintered form of the metal powder 40 (such as copper powder) into a circular distribution pattern ( Please cooperate with FIG. 4) and use the powder limiting net body 50 as a limiting member of the metal powder 40.

In addition, as shown in FIG. 9, the mesh sintered composite capillary structure 30 is a partial side distribution type, and the evaporated segment sintered capillary structure 20 is sintered by filling the metal powder 40B of the evaporation section 12 with a ring cloth. The shape is formed by the powder limiting mesh body 50 as a limiting member in the powder filling process of the metal powder 40B.

One of the core designs of the present invention mainly lies in the capillary structure of the sintered composite capillary structure 30 of the mesh body and the sintered capillary structure 20 of the evaporation section, wherein the mesh sintered composite capillary structure 30 is formed by the powder sintered layer thereof. 32 is a pre-sintered and fixed type on the surface of the metal mesh body 31, and then the mesh-sintered composite capillary structure 30 is placed in the tubular body 10, so that the cross-sectional area can be reduced to a minimum state, so the relative Amplifying the cross-sectional space of the heat pipe vapor flow path 16; and the flexible property of the mesh sintered composite capillary structure 30 is more conducive to the bending process of the heat pipe A pipe wall, so that the capillary structure and the heat pipe A pipe wall can be Maintain a stable relationship and effectively prevent it The problem that the flow channel is deformed, blocked, and blocked due to the bending process; and the arrangement of the sintered capillary structure 20 in the evaporation section can improve the vaporization efficiency of the working fluid 15 of the evaporation section 12, thereby improving the heat dissipation efficiency of the heat pipe A.

Next, the heat control method for controlling the sintering position of the capillary structure according to the present invention is as follows, and includes the following steps: (as shown in FIG. 8) 1. As shown in FIG. 8(a), a tube 10 is prepared. One end of the pipe body 10 is first sealed, and the other end is provided with an opening 60 communicating with the inner space 14 of the pipe body 10; 2. As shown in FIG. 8(a), a mesh sintered composite is formed. The capillary structure 30 is formed by pre-sintering and fixing the metal powder 40 on the surface of at least one side of the metal mesh body 31 to form a powder sintered layer 32. 3. As shown in FIG. 8(b), taking a core rod 90; 4, as shown in FIG. 8(b), the mesh sintered composite capillary structure 30 is placed against the mandrel 90, and a powder-restricted mesh body 50 is annularly wrapped around the core. The rod 90 is positioned to bring the mesh sintered composite capillary structure 30 against the mandrel 90; 5. As shown in FIG. 8(c), the mandrel 90 is opened by the opening of the tube 10. 60 is inserted into the inner space 14 of the pipe body 10 to synchronously introduce the mesh sintered composite capillary structure 30 together with the powder limit net body 50 into the inner space 14 of the pipe body 10, and the mesh body is sintered. The wicking structure 30 corresponds at least to the position of the predetermined condensing section 13 of the pipe body 10, and the powder limiting net body 50 corresponds to the boundary between the predetermined condensing section 13 of the pipe body 10 and the evaporation section 12; As shown in (d), the powder limiting net body 50 is used as a bottom limiting member for filling the powder, and the metal powder is filled in the opening 60 of the tube body 10. The final 40 is sintered and shaped to form an evaporation section sintered capillary structure 20; 7. As shown in FIG. 8(e), the mandrel 90 is drawn out of the inner space 14 of the pipe body 10; 8. As shown in FIG. As shown in (f), the inner space 14 of the tube body 10 is subjected to a working fluid infusion and evacuation process through the opening 60 of the tube body 10, and the opening 60 is resealed to form a sealing end 11, that is, the heat pipe A is formed.

Advantages of the invention:

1. The "heat pipe structure capable of controlling the sintering position of the capillary structure and the method for manufacturing the same" disclosed in the present invention mainly comprises sintering the capillary structure by the evaporation section, forming a mesh type sintered composite capillary structure of the embedded state, and sintering the mesh body. Between the composite capillary structure and the sintered capillary structure of the evaporation section, and having the innovative unique structural design of the powder limit net body, the powder can be used to form the evaporation section of the sintered capillary structure by using the powder to limit the mesh structure. The limiting member in the powder filling process can be used to facilitate the manufacture of the sintered capillary structure in the evaporation section and can accurately control the sintering position and the sintering range, and can utilize the characteristics of the sintered composite body structure of the inserted mesh body. It can achieve more practical progress and better industrial utilization benefits such as further expanding the heat pipe vapor flow space, facilitating the processing of the pipe wall, making it easier to manufacture and improving the vaporization efficiency of the working fluid.

2. The composite capillary structure is an ultra-thin thickness type design between 0.2mm and 0.8mm, so that the internal space of the thinned heat pipe can still be achieved in accordance with the spatial pattern of the thinning of the heat pipe specification. Maintaining sufficient gas flow path space and achieving high efficiency of capillary transfer of working fluid.

3. The structural design of the sintered capillary structure in the evaporation section is set to a circular distribution pattern, and the 俾 can amplify the dispersed area when the working fluid is refluxed to the evaporation section. In order to improve the heat vaporization efficiency of the working fluid in the evaporation section of the heat pipe, the practical progress of further improving the heat dissipation effect of the heat pipe is achieved.

4. The structural design of the limiting member in the metal powder filling process is formed by the powder limiting net body. When the length of the heat pipe finished product required by the industry is long, the setting of the powder limit net body can be The distribution position of the metal powder sintering can be adjacent to the open end of the heat pipe (referring to the semi-finished state), thereby improving the yield and convenience of the heat pipe powder sintering process.

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‧‧‧heat pipe

10‧‧‧ tube body

11‧‧‧Closed end

12‧‧‧Evaporation section

13‧‧‧Condensation section

14‧‧‧Internal space

15‧‧‧ working fluid

16‧‧‧Vapor flow path

20‧‧‧Sintered capillary structure in the evaporation section

30‧‧‧Net body sintered composite capillary structure

31‧‧‧Metal mesh body

311‧‧‧Unit metal wire

32‧‧‧Stained powder layer

40‧‧‧Metal powder

40B‧‧‧Metal powder

50‧‧‧ powder limit net body

60‧‧‧ openings

90‧‧‧ mandrel

Figure 1 is a cross-sectional view showing a combination of preferred embodiments of the structure of the present invention.

Figure 2 is an exploded perspective view of a preferred embodiment of the structure of the present invention.

Fig. 3 is a cross-sectional view taken along line B-B of Fig. 1.

Fig. 4 is a cross-sectional view taken along line C-C of Fig. 1.

Fig. 5 is an enlarged cross-sectional view showing the partial structure of the sintered composite capillary structure of the mesh body of the present invention.

Fig. 6 is a view showing an embodiment in which the powder sintered layer of the present invention is provided on both side surfaces of a metal mesh body.

Fig. 7 is a view showing an embodiment in which a sintered body composite structure of a mesh body of the present invention and a vacuum tube body are sintered and fixed.

Figure 8: Schematic diagram of the thermal control method of the present invention.

Fig. 9 is a view showing another embodiment of the sintered capillary structure of the evaporation section of the present invention.

A‧‧‧heat pipe

10‧‧‧ tube body

11‧‧‧Closed end

12‧‧‧Evaporation section

13‧‧‧Condensation section

14‧‧‧Internal space

20‧‧‧Sintered capillary structure in the evaporation section

30‧‧‧Net body sintered composite capillary structure

31‧‧‧Metal mesh body

32‧‧‧Stained powder layer

40‧‧‧Metal powder

50‧‧‧ powder limit net body

60‧‧‧ openings

90‧‧‧ mandrel

Claims (12)

The utility model relates to a heat pipe structure capable of controlling a sintering position of a capillary structure, comprising: a pipe body, which is a hollow closed pipe body type having two sealing ends, which is divided into an evaporation section and a condensation section according to heat dissipation, and the inner space of the pipe body a vacuuming state and containing a working fluid; an evaporation section sintering the capillary structure, and the evaporation section of the pipe body is at least a metal powder sintered and fixed on the inner wall of the evaporation section; A net body sintered composite capillary structure is disposed in a condensation section of the pipe body, and comprises a metal mesh body and at least one powder sintered layer, wherein the metal mesh system is composed of a longitudinally and horizontally knitted interlaced unit metal wire. a mesh body shape, the metal mesh body comprising two side surfaces, the powder sintered layer is pre-sintered and fixed on at least one side surface of the metal mesh body by metal powder, and the mesh sintered composite capillary structure is placed Into the inner space of the pipe body; and wherein the meshed composite composite capillary structure has flexibility characteristics when not placed in the inner space of the pipe body, and the mesh body sintered composite capillary After being woven into the pipe body, the pipe body can be flexibly deformed according to the bending process of the pipe wall; a powder limiting net body is disposed at one end of the sintered capillary structure of the evaporation section and is sintered with the net body composite capillary structure Linking, lapping or joining to transfer the working fluid cooled by the condensing section to the evaporation section. The heat pipe structure capable of controlling the sintering position of the capillary structure according to the first aspect of the patent application, wherein the sintered body composite structure of the mesh body is bonded, overlapped or joined with the sintered capillary structure of the evaporation section, and the thickness of the powder sintered layer is Between 0.1mm and 0.7mm, the mesh body is sintered The total thickness of the composite capillary structure is a thin thickness profile of between 0.2 mm and 0.8 mm. The heat pipe structure capable of controlling the sintering position of the capillary structure according to claim 1 or 2, wherein the mesh sintered composite capillary structure is in a sintered fixed state with the pipe body. The heat pipe structure capable of controlling the sintering position of the capillary structure according to the first aspect of the patent application, wherein the powder limit network system is separately formed into a shape of the outer side of the sintered composite capillary structure of the mesh body, or The meshed composite capillary structure of the net body is directly formed into a shape. The heat pipe structure capable of controlling the sintering position of the capillary structure according to claim 1 or 2, wherein the sintered capillary structure of the evaporation section is formed by directly extending one end of the sintered composite capillary structure of the mesh body to an evaporation section. The sintered composite capillary structure of the net body is a local side distribution type, and the sintered capillary structure of the evaporation section is not formed by the expansion of the mesh sintered composite capillary structure, and the side is compensated by the sintered metal powder to form a ring shape. The distribution pattern is used as the limiting member for filling the metal powder by the powder limiting net body. The heat pipe structure capable of controlling the sintering position of the capillary structure according to the first or second aspect of the patent application, wherein the mesh sintered composite capillary structure is a local side distribution type, and the sintered capillary structure of the evaporation section is by a loop cloth. The metal powder filled in the evaporation section is formed by sintering and shaped, and the powder limiting mesh body is used as a limiting member in the metal powder filling process. A heat control method capable of controlling a sintering position of a capillary structure, comprising: preparing a tube body, sealing one end of the tube body first, and leaving an opening at the other end to communicate with the inner space of the tube body; and forming a net body sintered composite Capillary tissue, which is attached to a metal mesh The at least one side surface is formed by pre-sintering and fixing the metal powder to form a powder sintered layer, and the mesh sintered composite capillary structure has a flexible property when not placed in the inner space of the pipe body; taking a core rod; The net-sintered composite capillary structure is placed on the mandrel, and the core rod is wrapped by a powder limiting net body to obtain the positioning of the sintered composite capillary structure of the net body against the mandrel. Inserting the mandrel into the inner space of the pipe body through the opening of the pipe body, simultaneously introducing the mesh sintered composite capillary structure into the inner space of the pipe body together with the powder limit net body, and sintering the mesh body The capillary structure corresponds at least to a predetermined condensation section position of the pipe body, and the powder limit net body corresponds to a boundary between the predetermined condensation section and the evaporation section of the pipe body; and the powder limit net body is used as a bottom limit of the powder filling a member, the metal powder is filled into the opening of the tube body to be sintered and shaped to form an evaporation section to sinter the capillary structure; the core rod is drawn out of the inner space of the tube body; and the inside of the tube body is penetrated through the tube body opening Between the working and vacuum perfusion process, re-sealing the opening, i.e., the heat pipe is made. The heat control method capable of controlling the sintering position of the capillary structure according to the seventh aspect of the patent application, wherein the thickness of the powder sintered layer of the sintered composite capillary structure of the mesh body is between 0.1 mm and 0.7 mm, and the mesh body is sintered. The total thickness of the composite capillary structure is a thin thickness profile of between 0.2 mm and 0.8 mm. The heat control method for controlling the sintering position of the capillary structure according to the seventh or eighth aspect of the patent application, wherein the sintered composite capillary structure of the mesh body and the tubular body are further fixed by sintering means. According to the heat control method for controlling the sintering position of the capillary structure according to Item 7 of the patent application scope, wherein the powder limit network system is separately formed and then wrapped on the outer side of the sintered composite capillary structure of the mesh body, or The meshed composite capillary structure of the net body is directly formed into a shape. According to the heat control method of controlling the sintering position of the capillary structure according to the seventh aspect of the patent application, wherein the sintered capillary structure of the evaporation section is formed by directly extending one end of the sintered composite capillary structure of the mesh body to an evaporation section, the net The body-sintered composite capillary structure is a local-side distribution type, and the sintered capillary structure of the evaporation section is not formed by the mesh-sintered composite capillary structure, and the side is compensated for the annular distribution by the filled metal powder. Type. According to the heat control method for controlling the sintering position of the capillary structure according to Item 7 of the patent application scope, wherein the sintered composite capillary structure of the mesh body is a partial side distribution type, and the sintered capillary structure of the evaporation section is filled by a ring cloth. It is composed of metal powder in the evaporation section.