TWI539131B - Vacuum thermal conductor with strengthened distal ends and the method for making the same - Google Patents

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 And after the two end caps are vacuumed inside, it is often easy to deform due to the lack of rigidity of the structure, wherein the end cap is more Only the circumferential part is welded and fixed, and the middle area lacks any support reinforcement measures to easily cause bulging or dent, and once the end cover is bulged or recessed, the flatness of the end face of the hollow heat-conducting column is lost. In addition, it seriously affects its thermal conductivity, which is an important technical issue worthy of consideration in the relevant industry.

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 rib is placed in the inner 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 elongation at least greater than the maximum width 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: extruding a metal through a hand A vacuum cylinder is prepared in the section, and the vacuum cylinder has a non-flat shape; the vacuum cylinder is integrally extruded on the inner wall thereof during the extrusion means to form at least one of the convex portions of the interior of the hollow chamber. The inner rib and the inner rib have an elongation of at least one third of the maximum width of the hollow cavity section; 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 Closing the end cap to the end of the vacuum cylinder through a welding joint means, and vacuuming the hollow chamber to close and vacuum the hollow chamber; and making the inner rib end and the end cap And the welding bonding means forms a welding area at a joint of the end of the end cover with the end of the vacuum cylinder and a joint of the end of the inner rib and the end cover.

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.

A‧‧‧Vacuum heat conductor

10, 10B, 10C‧‧‧ vacuum cylinder

11‧‧‧End

12‧‧‧ hollow room

20‧‧‧End cover

21‧‧‧Transmissive embedded jack

30, 30B, 30C‧‧‧Muscle tissue

40‧‧‧ working fluid

50‧‧‧ inner rib

51‧‧‧ gaps

52‧‧‧Inner frame slot space

60, 60B‧‧‧ welding area

61‧‧‧ Lateral Export Department

70‧‧‧Degassing operation channel

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of a preferred embodiment of the present invention.

Figure 2 is an exploded perspective view of the end cap and the vacuum cylinder of the preferred embodiment of the present invention.

Figure 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 in a friction welding combined 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 an inner 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.

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. 1) 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 width of the section of the hollow chamber 12 (as shown by L2 in Fig. 4), and the end of the inner rib 50 is The end caps 20 are combined; and wherein the weld zone 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 at the junction with the end 11 of the vacuum cylinder 10. And the end of the inner rib 50 is 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. Features that enable the end cap 20 to A combination of positioning effect of a larger area (compared to the conventional circumferential welding type) to ensure that the surface of the end cap 20 is flat, effectively preventing deformation of the bulge or depression, etc. 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 weld area 60 (shown in FIG. 3) where the end of the inner rib 50 is joined to the end cap 20, and is a through-type insertion hole 21 formed in the end cover 20 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 Inserted into the fold portion by the notch portion 51 In the inner frame groove space 52, 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 width 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 inside 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 coupled to the end cap 20; and wherein the solder joint means is to be joined to the end of the vacuum cylinder 10 at the periphery of the end cap 20. And an end portion of the inner 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 to make the outer diameter of the end cap 20 And the type of the vacuum cylinder 10 is matched with the inner diameter specification and the shape, and the end cap 20 is formed with a penetrating insertion hole 21 at the end of each inner rib 50 so that the end of each inner rib 50 is It can be inserted into the corresponding penetrating insertion hole 21, and the end cover 20 is formed in the shape of the end portion 11 of the vacuum cylinder 10, and the welding of the end of the inner rib 50 is combined with the end cover 20. The region 60 is welded along the end of the inner rib 50 by the penetrating insertion hole 21 formed along the end cover 20, 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 passed through the hollow 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.).

The advantages of the invention are illustrated:

The invention discloses a "vacuum heat conductor with end face strengthening effect and a method for preparing the same" The welding zone between the vacuum cylinder body, the end cover, the capillary structure, the working fluid, the inner rib and the end cap and the vacuum cylinder body comprises the end of the end cap and the end portion of the vacuum cylinder body and the inner rib end The innovative unique structural form and technical features, such as the combination of the part and the end cover, enable the vacuum heat conductor to reach the end face bonding state and the vacuum cylinder structure to be large in comparison with the conventional structure proposed in the prior art. Strengthen and effectively prevent structural deformation and make it more durable and of better quality.

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‧‧‧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, a metal extruded structure body and a non-flat shape of a cross section, the vacuum cylinder body having two ends and forming a hollow chamber inside; at least one end a cover, which is closed to at least one end of the vacuum cylinder with respect to the welding, so that the hollow chamber is closed; at least one capillary structure is disposed inside the hollow chamber of the vacuum cylinder; a working fluid The inner rib is disposed in the interior of the hollow cavity; the 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 More than one third of the maximum width of the section of the hollow chamber, and the end of the inner rib is combined with the end cap; and wherein 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 end of the inner rib are combined with the end cover; thereby achieving an effect of strengthening both 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 cap corresponds to Each of the inner rib ends is further formed with a penetrating inserting hole, so that the inner rib end portion can be inserted into the corresponding penetrating insertion hole, and the end cap is embedded. a shape of an end portion of the vacuum cylinder, and the welding region where the end portion of the inner rib is combined with the end cover is formed along the end cover and the inner rib end The phase is inserted into the pattern for welding. 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 and the outer diameter gauge of the vacuum cylinder Cooperating with the pattern, the end cap is flatly abutted against the end of the vacuum cylinder and the end of the inner rib so that the welding area between the end cap and the vacuum cylinder is The welding region is formed by a joint portion distributed around the end of the end cap and the end portion of the vacuum cylinder and the end portion of the inner rib and 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 the process of extruding Forming, at the inner wall thereof, integrally extruding at least one inner rib forming a convex shape inside the hollow cavity, and the inner rib has an inner elongation of at least three points larger than a maximum width of the hollow cavity section Forming at least one end cover; accommodating at least one capillary structure and a working fluid inside the hollow cavity of the vacuum cylinder; sealing the end cover to the end of the vacuum cylinder through a welding bonding means And vacuuming the hollow chamber to close the hollow chamber and vacuum; and aligning the end of the inner rib with the end cap And wherein the solder bonding means forms a soldering area at a junction of the end of the end cap and the end of the vacuum cylinder and a joint of the end of the inner rib and the end cap. 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, so that the outer diameter of the end cover is The type is matched with the inner diameter specification and the shape of the vacuum cylinder, and the end cover is formed with a penetrating insertion hole corresponding to each end of the inner rib so that the end portions of the inner rib can be inserted. Corresponding to the transmissive insertion hole, and forming the end cover in a shape embedded in the end of the vacuum cylinder, and the welding region of the end portion of the inner rib and the end cover is tied The penetrating inserting hole formed by the end cap is welded to the end portion of the inner rib, and the welding bonding means is agitating 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 evacuates the hollow chamber and the working fluid is poured, 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, wherein the welding bonding means adopts agitation welding, so that the outer diameter specification and the shape of the end cap and the outer diameter specification of the vacuum cylinder are The pattern is matched to form a state in which the end cap is flat against the end of the vacuum cylinder and the end of the inner rib, so that the welding area between the end cap and the vacuum cylinder is distributed The welding zone is formed at a periphery of the end of the end cap and the end of the vacuum cylinder and a joint of the end of the inner rib and the end cap, and the welding zone has at least one side leading portion. The method of vacuum heat conduction with end face strengthening effect according to claim 8 or 10, wherein the end cap is closed at the end of the vacuum cylinder, and the end cap is further closed by a flat processing method. The surface treatment is in a flat surface state.