TW201627625A - Vacuum thermal conductor with strengthened distal ends and the method for making the same - Google Patents

Abstract

A vacuum thermal conductor with strengthened distal ends includes a vacuum hollow body having an elongated chamber defined therein for containing liquid, wherein the vacuum hollow body has a non-flat cross-section. At least one end of the vacuum hollow body is air-tightly closed by an end-piece that is secured on the at least one end of the hollow body by friction stir welding for closing the chamber. At least one capillary structure is disposed in the chamber. At least one rib peripherally inwardly extends from the chamber, wherein the height of the at least one rib is greater than one-thirds of the maximum cross-section of the chamber and the distal end of the rib is combined with the at least one end-piece. The welding area between the at least one end-piece and the hollow body contains the periphery of the end-piece according to the distal end of the hollow body, and the connecting portion of the end-piece and the rib for strengthening the structure of the distal end of the hollow body and preventing the distal end of the hollow body from being deformed.

Description

Vacuum heat conductor with end face strengthening effect and preparation method thereof

The invention relates to a vacuum heat conductor and a manufacturing method thereof; in particular, to an inventor of an innovative vacuum heat conductor technology with an end face strengthening effect.

The term "vacuum heat conductor" as used in the present invention refers to a heat conductor structure having a vacuum chamber portion therein, for example, a heat pipe commonly used in a heat dissipation module, or a hollow heat conduction column visible in an LED lamp is referred to.

In the application of the vacuum heat conductor, when the radial section size is small or the radial section is set to a flat shape, the probability of deformation due to abnormal internal pressure changes is small; conversely, when the vacuum heat conductor is used When the cross-sectional size is large and the radial section is set to a non-flat shape (including circular, elliptical, rectangular, polygonal, etc.), the probability of deformation due to abnormal internal pressure changes is relatively large.

Taking the hollow heat-conducting column type used in the LED lamp as an example, since the hollow-type heat-conducting column is usually a heat-dissipating interface for assembling and arranging the LED light-emitting die with the axial end face thereof, the hollow heat conduction is adopted. The end face structure of the column must be flattened, which is different from the shape of the end of the heat pipe, which is usually arc-shaped or flattened. Based on this, the hollow heat-conducting column structure is usually designed by a hollow cylinder. The two ends are respectively covered with one end cover, and the end cover and the end surface of the hollow cylinder are welded and fixed together; however, it is found that this structural type still has some problems in practical application experience: the hollow cylinder After the two end caps are vacuumed inside, it is easy to be deformed due to the lack of rigid support of the structure, wherein the end cap is only fixed by welding only in the circumferential portion, and the middle region lacks any support reinforcing measures and is easy to produce drums. Convex or concave phenomenon, and once the end cap is bulged or recessed, the flatness of the end face of the hollow heat-conducting column is lost, thereby seriously affecting the heat conduction effect, which is worthy of phase Industry breakthrough thinking critical technical challenge.

Therefore, in view of the problems existing in the above-mentioned conventional vacuum heat conductor technology, how to develop an innovative structure 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 vacuum heat conductor with an end face strengthening effect and a manufacturing method thereof, and the technical problem to be solved is to develop a new type of vacuum heat conductor and a manufacturing technique which are more ideal and practical. The goal is to think about innovative breakthroughs.

The technical feature of the present invention solves the problem. In terms of the structural surface of the vacuum heat conductor, the vacuum heat conductor comprises: a vacuum cylinder body, a metal extruded structure body and a non-flat shape of the cross section, and the vacuum cylinder body has two end portions. Forming a hollow chamber therein; at least one end cover is oppositely welded to at least one end of the vacuum cylinder to close the hollow chamber; at least one capillary structure is disposed inside the hollow chamber; a working fluid, The inner hull is disposed in the interior of the hollow cavity; the at least one inner rib is integrally formed on the inner wall of the vacuum cylinder to protrude toward the inner cavity of the hollow cavity, and the inner rib has an elongation at least greater than a maximum height of the hollow cavity section In one part, the inner rib end is combined with the end cap; and the welding area between the end cap and the vacuum cylinder must include the end of the end cap and the end of the vacuum cylinder end and the inner rib end and end cap The combination.

Another main object of the present invention is to provide a vacuum heat conduction system method with an end face strengthening effect, which comprises: preparing a vacuum cylinder by a metal extrusion method, and the vacuum cylinder has a non-flat shape; The vacuum cylinder is integrally extruded on the inner wall thereof during the extrusion process to form at least one inner rib protruding toward the inner cavity of the hollow cavity, and the inner rib inner elongation is at least greater than the maximum height of the hollow cavity section One-third of the cover; at least one end cover is prepared; at least one capillary structure and a working fluid are accommodated in the inner cavity of the vacuum cylinder; and the end cover is closed at the end of the vacuum cylinder through a welding joint, and The hollow chamber is evacuated to close the hollow chamber and to be in a vacuum state; and the inner rib end is combined with the end cap; and the welding bonding means is to be combined with the end of the vacuum cylinder at the end of the end cap A weld zone is formed at both the end of the inner rib and the end cap.

The main effects and advantages of the present invention are the practical advancement that the vacuum heat conductor can achieve the end face bonding state and the vacuum cylinder structure are greatly strengthened, the structural deformation is effectively prevented, the durability is further improved, and the quality is improved.

Please refer to the first, second, third, and fourth drawings, which are preferred embodiments of the vacuum heat conductor having the end face strengthening effect of the present invention and the method for manufacturing the same, but the embodiments are for illustrative purposes only, and Without being limited by the structure, the vacuum heat conductor A comprises, in terms of a structural plane, a structure in which a vacuum cylinder 10 is a metal extruded type (such as an aluminum extruded type) and has a non-flat shape. The vacuum cylinder 10 has two end portions 11 and a hollow chamber 12 is formed therein; at least one end cover 20 is closed to at least one end portion 11 of the vacuum cylinder 10 with respect to the welding joint to The hollow chamber 12 is in a closed state; at least one capillary structure 30 is disposed inside the hollow chamber 12 of the vacuum cylinder 10; a working fluid 40 (only shown in FIG. 4) is accommodated inside the hollow chamber 12; At least one inner rib 50 is integrally formed on the inner wall of the vacuum cylinder 10 to protrude toward the inner cavity 12, and the inner rib 50 has an inner elongation (as shown by L1 in FIG. 4). At least one third of the maximum height of the section of the hollow chamber 12 (as shown by L2 in Fig. 4), and the inner rib 5 The end portion of the 0 is coupled to the end cap 20; and wherein the weld region 60 between the end cap 20 and the vacuum cylinder 10 (as shown in FIG. 3) is to include the periphery of the end cap 20 and the vacuum cylinder 10 The joint of the end portion 11 and the end portion of the inner rib 50 are combined with the end cover 20; thereby achieving the effect of strengthening the structure of the end face and the structure of the vacuum cylinder 10. In detail, since the inner rib 50 is integrally formed on the inner wall of the vacuum cylinder 10 to protrude toward the inner portion of the hollow chamber 12, the wall structure of the vacuum cylinder 10 can be formed. For example, the function of the reinforcing ribs can effectively resist the bending deformation force of the wall of the vacuum cylinder 10; the welding area 60 between the end cover 20 and the vacuum cylinder 10 includes the combination of the end of the inner rib 50 and the end cover 20. The feature enables the end cap 20 to obtain a larger area of the combined positioning effect (compared to the conventional only circumferential welded type) to ensure that the surface of the end cap 20 is flat, effectively preventing the occurrence of bulging or Deformation phenomenon such as depression, when the vacuum heat conductor A is applied with its end cover 20 as a heat source (such as an LED lamp) contact surface, it can achieve long-lasting and high-quality heat conduction and heat dissipation.

As shown in the first and second figures, wherein the outer diameter specification and shape of the end cap 20 can be matched with the inner diameter specification and type of the vacuum cylinder 10, and the end cover 20 corresponds to the end of each inner rib 50. The through-hole insertion hole 21 is further formed so that the end of each inner rib 50 can be inserted into the corresponding penetrating insertion hole 21, and the end cover 20 is embedded in the end of the vacuum cylinder 10. a type of 11 and a welded region 60 (shown in FIG. 3) where the end of the inner rib 50 is joined to the end cap 20, the through-type insertion hole 21 formed in the end cap 20 and the inner portion The ends of the ribs 50 are intercalated and welded.

As shown in FIGS. 5 and 6, the outer diameter specification and shape of the end cap 20 may also match the outer diameter specification and type of the vacuum cylinder 10, and the end cap 20 is formed to be flat against the vacuum cylinder 10. The end portion 11 and the end portion of the inner rib 50 are so that the welding portion 60B between the end cap 20 and the vacuum cylinder 10 (as shown in FIG. 7) is distributed around the periphery of the end cap 20 and the vacuum cylinder 10 The end portion 11 is joined to the welded portion 60B where the end portion of the inner rib 50 is joined to the end cap 20, and the welded portion 60B has at least one side leading portion 61 (only shown in Fig. 7).

As shown in FIG. 4, the inner rib 50 may be in a cross-shaped arrangement. This is a preferred embodiment, but is not limited thereto, and for example, a trigeminal distributed setting type or a multi-forked distributed setting type is an implementable type.

As shown in FIG. 9, the inner extending end of the inner rib 50 is further formed with an inner frame groove space 52 having a notched portion 51. In this example, the inner frame groove space 52 added by the inner rib 50 is mainly used as an auxiliary positioning structure of the capillary structure 30B, and the capillary structure 30B can be a metal mesh type, and the partial region thereof is The recessed portion 51 is inserted into the inner frame groove space 52 in a folded shape, whereby the accommodation state of the capillary structure 30B can be appropriately positioned.

Wherein, the capillary structure 30 may adopt at least one of the following types: a sheet metal mesh body (as shown in FIG. 1), a rolled metal mesh body, a metal powder sintered body, and a groove (as shown in FIG. 10). The capillary structure 30C).

In the non-flat cross-sectional aspect of the vacuum cylinder 10 of the present invention, the specific embodiment may be a vacuum cylinder 10B as shown in FIG. 11 in addition to the circular shape shown in FIG. The elliptical shape, or the vacuum cylinder 10C as shown in Fig. 12, is a square shape.

Further, the present invention further provides a vacuum heat conduction system method with an end face strengthening effect, which comprises: 1. Preparing a vacuum cylinder 10 by a metal extrusion means, and the vacuum cylinder 10 has a non-flat shape. (refer to Fig. 4); 2. The vacuum cylinder 10 is integrally extruded in the process of the extrusion means to form at least one inner rib extending toward the inner portion of the hollow chamber 12. 50, and the inner elongation of the inner rib 50 (as shown by L1 in FIG. 4) is at least greater than one third of the maximum height of the hollow chamber 12 (as shown by L2 in FIG. 4); Preparing at least one end cover 20 (refer to FIG. 1); 4. accommodating at least one capillary structure 30 and a working fluid 40 in the hollow chamber 12 of the vacuum cylinder 10 (refer to FIG. 4); The end cap 20 is closed to the end portion 11 of the vacuum cylinder 10 by a welding bonding means, and the hollow chamber 12 is evacuated to make the hollow chamber 12 closed and vacuumed; The end of the rib 50 is combined with the end cap 20; and wherein the welding bonding means is required to be around the end cap 20 and the vacuum cylinder An end portion 11 at the junction 10 and the inner end portion of the rib 50 and the end cap 20 are combined at the weld region 60 is formed (as shown in FIG. 3 reference).

As shown in FIGS. 1 to 3, the end cap 20 and the end portion 11 of the vacuum cylinder 10 are further passed through a fitting means, so that the outer diameter and shape of the end cap 20 are in the vacuum cylinder 10 The diameter specifications and the patterns are matched, and the end caps 20 are formed with the penetrating insertion holes 21 at the ends of the inner ribs 50 so that the ends of the inner ribs 50 can be inserted into the corresponding penetrating type. The insertion hole 21 is formed, and the end cover 20 is formed in a shape embedded in the end portion 11 of the vacuum cylinder 10, and the welding portion 60 at the end where the end of the inner rib 50 is combined with the end cover 20 is formed along the end cover 20. The penetrating inserting hole 21 is welded to the end portion of the inner rib 50, and the welding bonding means can be stirred and welded.

In the embodiment disclosed in the above paragraph, during the welding and bonding means, a degassing working channel 70 may be left to communicate with the hollow chamber 12 (as shown in FIG. 13), and the degassing operation channel 70 is hollowed through the degassing operation channel 70. The chamber 12 performs an operation such as vacuuming and infusion of the working fluid 40, and then filling the degassing operation channel 70 by a filling means (note: the drawing may be omitted, which may be filled with solder, glue or plug body). Closed.

As shown in the fifth to eighth embodiments, the welding bonding means may be agitating and welding, so that the outer diameter specification and the type of the end cap 20 are matched with the outer diameter specification and the shape of the vacuum cylinder 10 to constitute the end cover 20. The flattening is in a state of abutting against the end portions of the end portions 11 of the vacuum cylinder 10 and the inner ribs 50, so that the welded portion 60B between the end cap 20 and the vacuum cylinder 10 is distributed around the periphery of the end cap 20 and the vacuum cylinder. The joint portion of the end portion 11 of the body 10 and the welded portion 60B where the end portion of the inner rib 50 is combined with the end cap 20, and the welded portion 60B has at least one side leading portion 61 (only shown in Fig. 7) The purpose of the lateral deriving portion 61 is mainly based on the fact that the welding region 60B is extended in a single point during the process, which causes expansion and melting to affect the welding quality, so the lateral direction is derived. The portion 61 removes the lead-out point (and also the lead-in point) of the welded region 60B laterally to solve the aforementioned problem.

Wherein, after the end cap 20 is closed to the end portion 11 of the vacuum cylinder 10, the outer surface of the end cap 20 can be treated to a flat surface by a flat processing means (such as grinding, turning, etc.).

Advantages of the Invention: The vacuum heat conductor with end face strengthening effect and the manufacturing method thereof are mainly provided by the vacuum cylinder body, the end cover, the capillary structure, the working fluid, the inner rib and the end cover and the vacuum tube The welding area between the bodies includes innovative unique structural forms and technical features such as the junction of the end of the end cap and the end of the vacuum cylinder and the end of the inner rib end and the end cap, so that the present invention is compared with the prior art. In terms of the conventional structure, it is possible to make the vacuum heat conductor reach the end joint state and the vacuum cylinder structure are greatly strengthened, and the structural deformation is effectively prevented, and the utility model is more durable and the quality is improved.

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‧‧‧Vacuum heat conductor 10,10B,10C‧‧‧Vacuum cylinder 11‧‧‧End 12‧‧‧Centre chamber 20‧‧‧ End cap 21‧‧‧ Penetration socket 30, 30B 30C‧‧‧Muscle organization 40‧‧‧Working liquid 50‧‧‧Inner rib 51‧‧‧Indentation 52‧‧‧Inner frame groove space 60, 60B‧‧‧ Welding area 61‧‧‧ Lateral lead-out 70‧‧‧Degassing operation channel

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of a preferred embodiment of the present invention. Fig. 2 is a perspective view corresponding to the exploded view of the end cap and the vacuum cylinder of the preferred embodiment of the present invention. Fig. 3 is a perspective view showing the state in which the end cap and the vacuum cylinder are combined in the preferred embodiment of the present invention. Figure 4 is a plan sectional view showing the vacuum cylinder of the preferred embodiment of the present invention. Fig. 5 is an exploded perspective view showing the end cap of the present invention which is subjected to a friction stir welding embodiment. Fig. 6 is a perspective view showing the state in which the end cover is closed in the embodiment of Fig. 5. Fig. 7 is a schematic view showing the layout of the welding area of the embodiment of Fig. 5. Figure 8 is a schematic cross-sectional view of the agitating welder of the embodiment of Figure 5. Fig. 9 is a view showing an embodiment in which the inner rib inner end of the present invention is further formed with a frame groove space having a notched portion. Fig. 10 is a view showing an embodiment in which the capillary structure of the present invention adopts a groove type. Figure 11 is a view showing another embodiment of the cross-sectional form of the vacuum cylinder of the present invention. Fig. 12 is a view showing still another embodiment of the cross section of the vacuum cylinder of the present invention. Fig. 13 is a view showing an embodiment in which a degassing operation passage is left in the welding joining means of the present invention.

A‧‧‧Vacuum heat conductor

10‧‧‧Vacuum cylinder

11‧‧‧End

12‧‧‧ hollow room

20‧‧‧End cover

21‧‧‧Transmissive embedded jack

30‧‧‧Muscle tissue

40‧‧‧ working fluid

50‧‧‧ inner rib

Claims (11)

A vacuum heat conductor with an end face strengthening effect, comprising: a vacuum cylinder body, which is a metal extruded structure body and has a non-flat shape in a cross section, the vacuum cylinder body has two ends and a hollow chamber is formed inside; at least one end The cover is closed to at least one end of the vacuum cylinder with respect to the welding joint to make the hollow chamber closed; at least one capillary structure is disposed inside the hollow chamber of the vacuum cylinder; a working fluid is accommodated in the hollow cavity At least one inner rib is integrally formed on the inner wall of the vacuum cylinder to protrude toward the inner cavity of the hollow cavity, and the inner rib has an inner elongation of at least three of the maximum height of the hollow cavity section. One of the ends, and the inner rib end is combined with the end cap; and wherein the welding area between the end cap and the vacuum cylinder is to include the end of the end cap and the end of the vacuum cylinder end and The end portion of the inner rib is combined with the end cover; thereby achieving the effect of strengthening the end face bonding state and the vacuum cylinder structure. The vacuum heat conductor with end face strengthening effect according to claim 1, wherein the outer diameter specification and the shape of the end cap are matched with the inner diameter specification and the shape of the vacuum cylinder, and the end caps correspond to each The inner rib end portion is further formed with a penetrating insertion hole so that the inner rib end portion can be inserted into the corresponding penetrating insertion hole, and the end cover is embedded in the end of the vacuum cylinder body. The welding zone in which the end of the inner rib is combined with the end cap is welded along the end of the inner rib with the penetrating insert formed by the end cap. The vacuum heat conductor with end face strengthening effect according to claim 1, wherein the outer diameter specification and the shape of the end cover are matched with the outer diameter specification and the shape of the vacuum cylinder, and the end cover is flat and abutted. In the state of the end of the vacuum cylinder and the end of the inner rib, so that the welding area between the end cover and the vacuum cylinder is distributed at the joint of the end of the end cover with the two ends of the vacuum cylinder and the inner rib end The welded portion is combined with the end cap. A vacuum heat conductor having an end face strengthening effect according to claim 2 or 3, wherein the inner ribs are in a cross-shaped arrangement. The vacuum heat conductor having an end face strengthening effect according to the second or third aspect of the invention, wherein the inner protruding end of the inner rib is formed with an inner frame groove space having a notch portion. The vacuum heat conductor having the end face strengthening effect according to claim 2 or 3, wherein the capillary structure adopts at least one of the following types: a sheet metal mesh body, a coil metal mesh body, and a metal powder. Sintered body, groove. A vacuum heat conduction system method with an end face strengthening effect, comprising: preparing a vacuum cylinder body by a metal extrusion method, and the vacuum cylinder body has a non-flat shape; and the vacuum cylinder body is in a process of extruding Forming, at the inner wall thereof, integrally forming at least one inner rib protruding into the inner cavity of the hollow cavity, and the inner rib has an inner elongation of at least three thirds of a maximum height of the hollow cavity section Preparing at least one end cover; accommodating at least one capillary structure and a working fluid in the inner cavity of the vacuum cylinder; sealing the end cover to the two ends of the vacuum cylinder through a welding joint, and the hollow cavity The chamber performs a vacuuming operation to close the hollow chamber and a vacuum state; and the end portion of the inner rib is coupled to the end cover; and wherein the welding bonding means is required to be around the end cap and the vacuum tube The joint between the two end portions of the body and the end portion of the inner rib and the end cap form a welded region. The vacuum heat conduction method according to the seventh aspect of the invention, wherein the end cover and the end of the vacuum cylinder are further passed through a fitting means to make the outer diameter specification and shape of the end cover. Corresponding to the inner diameter specification and type of the vacuum cylinder, the end cap is formed with a penetrating insertion hole at the end of each inner rib so that the end portions of the inner ribs can be inserted into the corresponding penetration. Inserting the jack and forming the end cap into a shape embedded in the end of the vacuum cylinder, and the welding area where the end of the inner rib is combined with the end cap is a penetrating insert formed along the end cap Welding is performed in an insert type with the end of the inner rib, and the welding bonding means is agitation welding. The vacuum heat conduction system method with the end face strengthening effect described in claim 8 is characterized in that, in the process of the welding and bonding means, a degassing operation channel is further connected to the hollow cavity, and the degassing operation is repeated. The channel performs vacuuming and working fluid infusion on the hollow chamber, and then the filling operation channel is filled and closed by a filling means. The vacuum heat conduction system method with the end face strengthening effect described in claim 7 of the patent application scope, wherein the welding bonding means adopts the stirring welding to make the outer diameter specification and the shape of the end cover and the outer diameter specification and type of the vacuum cylinder body. Cooperating, the end cap is formed to be flat against the end of the vacuum cylinder end and the inner rib end, so that the welding area between the end cap and the vacuum cylinder is distributed around the end cap and the vacuum cylinder The end joint and the weld zone where the end of the inner rib is combined with the end cap, and the weld zone has at least one side lead-out. The vacuum heat conduction method with the end face strengthening effect described in claim 8 or 10, wherein the end cover is closed at the end of the vacuum cylinder, and the outer surface of the end cover is further processed by a flat processing method. It is flat and flat.