WO2006074583A1

WO2006074583A1 - A plate radiator of a heat pipe type

Info

Publication number: WO2006074583A1
Application number: PCT/CN2005/000906
Authority: WO
Inventors: Hongwu Yang
Original assignee: Hongwu Yang
Priority date: 2005-01-14
Filing date: 2005-06-23
Publication date: 2006-07-20
Also published as: CN1805133A

Abstract

The present invention relates to a plate radiator of a heat pipe type, which includes an enclosed tabulate shell made of metal sheets. The inner hollow chamber of said shell is vacuum and a liquid medium, which possesses a characteristic of evaporating while absorbing heat, is infused therein. An end face for absorbing heat by being coated on the surface of an electronic component which radiates heat is prefabricated on the outside of the bottom of said shell for absorbing heat. A support component is provided in the inner hollow chamber of said shell and it is connected fixedly with an inner surface of the shell. With the above arrangement the deformation of the shell caused by atmospheric action or pressure created by evaporation of said liquid medium in said chamber is avoided. The principle of heat pipe effect is applied to the present invention, and the inner and outer structure of said tabulate shell is reinforced. As a result, an effective solution is provided for resolving the problem of dissipating heat from super large-scale integrated circuits.

Description

Plate heat pipe radiator

The invention relates to a plate type heat pipe radiator, in particular to a flat heat pipe type radiator for dissipating heat radiating fins on a heat dissipating surface of a heat sink through a support member disposed in a heat sink working cavity . Background technique

With the increasing integration of integrated circuits, small and ultra-thin electronic products have been rapidly developed. These electronic products include notebook computers, functional modular devices in communication system workstations, and small electronic controls used in automated smart devices. Unit, etc. Taking laptops as an example, in recent years, with the continuous and rapid improvement of social demand, the performance of notebook products has been rapidly improved, and new products are emerging every year to eliminate old products.

The improvement of notebook performance depends on the improvement of hardware performance of the product and the continuous upgrading of system software and application software. Among them, the main function is the improvement of hardware performance, such as CPU operation speed and storage device read/write speed, etc. The increase in speed usually leads to an increase in power consumption, and the volume of electronic components (such as CPU) and the size of the notebook itself are decreasing, resulting in the reduction of the volume of the aluminum alloy comb-shaped heat sink and the cooling fan. Small, which causes the heat generated by the notebook computer to be difficult to dissipate. As we all know, the reliability and life of a CPU are closely related to its operating temperature. If the heat generated cannot be dissipated in time,

The reliability of the CPU will be greatly reduced, and even the computer system will not function properly.

Recently, some chip manufacturers have developed a new generation of CPU chips for notebook computers in order to eliminate the difficulty of heat dissipation caused by increasing the operation speed and reducing the chip size. Compared with the current general-purpose CPU chips, the former is keeping operations. Under the premise that the speed is not reduced, the smaller the volume and power consumption, the heat generated is reduced. However, even this new generation CPU chip is still subject to the heat dissipation problem, that is, in the current situation, Power consuming The reduction is very limited, and the desire to increase the speed of computing and further reduce the thickness (or volume) of the notebook is rapidly increasing. In this case, if the traditional aluminum comb-shaped heat sink and cooling fan continue to be used, Cooling, even if it can solve the current heat dissipation problem in a short time, it will still hinder the future development of notebook computers. It can be seen that research and design of new heat sinks combined with the development of low-power and high-speed CPU chips Development, in order to provide a good cooling technology guarantee for the further development of miniaturization and high-speed operation of notebook computers and many other electronic devices in the future. Summary of the invention

The object of the present invention is to provide a plate type for the above-mentioned conventional aluminum alloy comb heat dissipating plate and a heat dissipating fan to dissipate heat, and to hinder the development of miniaturization and high-speed operation of a small electronic device represented by a notebook computer. a heat pipe radiator disposed on a surface of the heat-generating electronic device, by using various heat-conducting devices on the inner side and/or the outer surface of the heat pipe working cavity made of a sheet metal material, using a heat pipe heat transfer principle The gas-liquid phase cyclic conversion process of the liquid working medium in the working chamber can quickly and efficiently dissipate the heat generated by the heat generating electronic device.

In order to achieve the above object, a heat pipe heat sink provided by the present invention comprises a flat-shaped closed casing made of a thin metal plate, the inner cavity of which is vacuumed and filled with heat vaporization characteristics. a liquid working medium, an outer surface of the bottom surface of the casing is pre-set with an endothermic end face for absorbing heat on the surface of the heat-generating electronic component; a support member is disposed in the inner cavity of the casing, the support The member is fixedly coupled to the inner side surface of the housing for eliminating deformation of the housing caused by pressure generated by external atmospheric pressure or internal liquid vaporization, enhancing the overall strength of the housing.

In the above technical solution, the heat absorbing end surface transfers heat generated by the heat generating electronic component to the liquid working medium in the casing, and the liquid working fluid is vaporized by heat, and the steam flows in the casing and conducts heat through other parts of the casing. After the steam releases heat, it condenses into a liquid and flows back to the endothermic end face. At the same time, the heat vaporization changes from the liquid phase to the gas phase, and the heat generated by the heat-generating electronic components is continuously released in the cyclic conversion from the liquid phase to the gas phase to the liquid phase, thereby achieving the purpose of heat dissipation. Since the housing is in the form of a flat plate, it can be made very thin, and it is mounted in a notebook computer or other small high-speed electronic device, and does not require excessive space to achieve good heat dissipation.

Since the inside of the casing is a vacuum, when not in use, the casing is subjected to external atmospheric pressure. When used, the thermal vaporization of the liquid working fluid generates internal and external pressure inside the casing, so the above technical solution adopts The inner side surface of the casing is fixed to the supporting member so that the casing does not deform due to internal or external pressure, and the casing is not broken and the liquid working fluid is leaked. The support member forms an inner rib structure that reinforces the overall strength of the housing.

According to the above technical solutions, the present invention overcomes the heat dissipation method of the traditional aluminum alloy comb-shaped heat sink combined with the heat dissipation fan by strengthening the inner and outer structure of the flat shell by using the heat pipe principle, and miniaturization and high-speed operation of the small electronic equipment. The invention has the advantages of the formation of the tube, the heat transfer speed is fast, the heat conduction is uniform, the use is convenient, the work reliability is high, and various styles and shapes can be made according to the specific conditions of the electronic device to meet different small sizes. The need for electronic equipment. The present invention provides an effective direct heat dissipation solution for the heat dissipation problem of ultra-large scale integrated circuits in the future.

Hereinafter, the present invention will be further described in detail with reference to the accompanying drawings. DRAWINGS

Figure 1 is a cross-sectional structural view showing a specific embodiment of the present invention;

2 is a schematic structural view of a casing of the present invention;

3 is a schematic view showing another arrangement of heat dissipation fins in the embodiment shown in FIG. 1;

Figure 4 is a plan view of a circular embodiment of the present invention;

Figure 5 is a plan view of a symmetrical pentagonal embodiment of the present invention;

Figure 6 is a schematic view showing the structure of two endothermic end faces of the present invention;

Figure 7 is a schematic structural view of an embodiment of a first wick of the present invention; Figure 8 is a schematic structural view of a second wicking embodiment of the present invention;

Figure 9 is a schematic structural view of a third embodiment of the wick according to the present invention;

Figure 10 is a schematic view showing the structure of a fourth wicking embodiment of the present invention;

Figure 11 is a schematic structural view of a fifth wicking embodiment of the present invention;

12 is a schematic view showing the structure of a first wick made of a metal foil according to the present invention; FIG. 13 is a schematic view showing the structure of a second wick made of a metal foil for enamel according to the present invention; A schematic view of the structure of the third sorbent core installed in the housing;

Figure 15 is a schematic enlarged view showing the edge of an L-shaped wick unit made of a metal foil according to the present invention;

Figure 16 is a schematic view showing the structure of a wicking unit which is bent by a single piece of metal foil according to the present invention; Figure 17 is a schematic view showing the structure of a wicking unit provided with a bump according to the present invention;

Figure 18 is a schematic structural view of a first embodiment of a support member of the present invention;

Figure 19 is a schematic view showing the structure of a second embodiment of the supporting member of the present invention;

Figure 20 is a schematic structural view of a third embodiment of the support member of the present invention;

Figure 21 is a schematic structural view of a fourth embodiment of the supporting member of the present invention;

Figure 22 is a schematic view showing the structure of a fifth embodiment of the supporting member of the present invention;

Figure 23 is a schematic structural view of a sixth embodiment of the support member of the present invention;

Figure 24 is a schematic view showing the structure of a seventh embodiment of the supporting member of the present invention. Specific selling method

1 is a cross-sectional structural view showing a specific embodiment of the present invention. This embodiment comprises a flat, closed housing 1 made of sheet metal. The shape of the cross section of the casing 1 is rectangular (which may also be tapered), and the internal cavity 2 is vacuumed and filled with a liquid working medium 3 having a thermal vaporization characteristic. A planar area is defined outside the bottom surface of the housing 1, and the planar area is the heat absorption end surface 11. The endothermic end face 11 is for attaching heat to the surface of the heat-generating electronic component 8. The endothermic end face 11 is integrally formed by stamping with the bottom surface of the casing 1 and protrudes outward from the bottom surface of the casing 1. The shape of the endothermic end face 11 may be a circular or rectangular or triangular platform.

The inner cavity 2 of the casing 1 is provided with a supporting member 4, .4. The supporting member 4 is fixedly connected with the inner side surface of the casing 1 for eliminating the pressure generated by the external atmospheric pressure or the vaporization of the internal liquid working medium 3 to the casing 1. The resulting deformation effect.

The inner side surface of the casing 1 is also provided with a wick 5 which is laid on the inner side surface of the casing 1 on the endothermic end face 11. The wick 5 has a capillary force that adsorbs a liquid to cause the liquid to spread over the wick.

A plurality of fins 6 made of a metal foil are also disposed on the upper surface of the casing 1, and the fins 6 are fixedly mounted on the casing 1 by brazing.

As shown in Fig. 2, the casing 1 can be formed by two metal sheets 12 and 13 which are pre-punched to form a bent edge. The bent edges of the two metal sheets 12 and 13 are joined by brazing.

On the bent edges of the metal sheets 12 and 13, the flanges 121 and 131 which are capable of correspondingly engaging are respectively provided in advance, and by this arrangement, the fastening is securely secured and the degree of bonding of the brazing is improved. In addition to the flanges 121 and 131, the tabs of the metal sheets 12 and 13 can also be used with correspondingly snap-fit snap-fit tabs or flanges and slots that can be snap-fitted.

The heat dissipating fins 6 in Fig. 1 can also be made of a metal foil as shown in Fig. 3. The metal foil is continuously bent to form a corrugated plate 61 having a plurality of continuous cross sections. The "V" shapes are connected and can be respectively disposed on the upper and lower outer side surfaces of the casing 1. The cross-sectional shape of the wavy plate 61 can also be made into a plurality of trapezoidal or circular arc shapes that are continuously joined.

The arrangement principle of the heat dissipation fins 6 is flexibly set according to the shape of the specific casing 1 and the design flow direction of the liquid working medium inside the casing 1, for example, the flow direction of the liquid working medium is perpendicular to the direction in which the heat dissipation fins 6 are disposed. Shape, etc., the purpose is to maximize the heat dissipation effect. The mounting manner of the supporting member ⁴ can also be combined with the extending direction of the heat dissipating fins 6. Generally, the extending direction of the supporting member 4 and the extending direction of the heat dissipating fins 6 can be perpendicular to each other, so that the housing 1 can be uniformly received. Not easily deformed. The principle of the shape of the casing 1 can be flexibly set according to the specific application, and the purpose is to be able to adapt to the internal space limitation of various small electronic devices, and to increase the area of the casing 1 by using a limited space to achieve the best. The heat dissipation effect optimizes the overall structure.

The present invention can be made into various forms according to the above-described principle of setting the heat radiating fins 6 and the setting principle of the shape of the casing 1, as shown in Figs. 4 and 5.

In Fig. 4, the casing 1 is circular in shape, and a recess 14 is preliminarily pressed in the middle of the upper surface thereof. A heat radiating fan 7 is disposed in the recessed portion 14. The cooling fan 7 uses a miniature axial fan. The heat radiating fins 6 are arranged at a spiral line centering on the heat radiating fan 7. When the heat dissipation fan 7 is in operation, the cooling air can smoothly flow out of the casing 1 along the gap of the heat dissipation fins 6, thereby achieving a good heat dissipation effect.

In Fig. 5, the shape of the casing 1 is a symmetrical pentagon. Two mounting through holes 15 for fixing the heat dissipating fan 7 are opened in the casing 1, and the mounting through holes 15 extend through the upper and lower surfaces of the casing 1. The cooling fan 7 also uses a ^: type axial flow fan. The position of the through hole 15 and the heat absorbing end face 11 is installed in the figure, and the heat dissipating fins 6 can be divided into two groups, each of which is radially spaced around a heat dissipating fan 7, and the upper and lower sides of the casing 1 are Heat sink fins 6 may be provided on each surface. In the design of the housing 1 shown in FIG. 5, the endothermic end face 11 is disposed at a position indicated by a broken line in the drawing, and a fluid passage can be provided in the inner cavity of the housing 1 to make the liquid working medium work. The circulation is performed according to the direction of the arrow in the figure to improve the heat dissipation efficiency.

In the embodiment shown in FIG. 1 , the heat absorbing end surface 11 can also be disposed in plurality according to specific requirements and can be a directly pre-designated plane area, which is located on the same plane as the bottom surface of the housing 1 , as shown in FIG. 6 . In the figure, the bottom surface of the rectangular casing 1 is provided with two heat absorbing end faces 11 in advance, one is square and the other is circular, so that two heat-generating electronic components can be used by the same plate heat pipe radiator. At the same time cooling.

In addition, in the embodiment shown in FIG. 1 , the wick 5 is disposed on the inner side surface of the casing 1 in addition to the heat absorbing end surface 11 , and may be extended to the inner surface of the entire casing 1 so that, in use, Whether small electronic devices are placed horizontally or tilted, cooled liquid The working medium ³ can be returned to the endothermic end face 11 by the capillary force of the wick 5, thereby ensuring that the liquid phase-to-gas phase cyclic phase transition of the liquid medium 3 is not interrupted, and the heat dissipation process is continuously performed.

The wick 5 can be made of a variety of materials and in a variety of forms. As shown in Fig. 7, the wick 5 is composed of a plurality of wire mesh 51 welded stacks. The multi-layered wire mesh 51 and its own rich voids can produce a better liquid adsorption effect.

Figure 8 is a partial schematic view of a porous wick manufactured by a powder sintering process. The wick 5 generates capillary force by means of micropores ^{52 in} its interior and surface to adsorb liquid, but the wick 5 itself The thermal conductivity is relatively poor, and it has the property of electrical insulation. When it is applied and in special occasions, such as direct contact with the circuit, short circuit can be avoided.

The wick 5 shown in Fig. 9 is a strip-shaped body which is formed by reciprocating continuous bending in accordance with a "U" shape using a metal foil having good thermal conductivity. A plurality of "U" shaped grooves are formed in the strip. A hole 53 is formed in the surface of the metal foil of the strip. The hole 53 may be a long hole or a round hole or a slit or a convex or concave slit. Compared with the other wicks mentioned above, the wick of the strip has not only good capillary adsorption force, but also a good conductor of heat itself, so that it can directly participate in heat conduction when used, and can Quickly transfer heat to the remote liquid working fluid, causing the liquid at the distal end to vaporize, thus accelerating the heat dissipation process. The hole 43 on the surface can be assisted in vaporization and heat dissipation. Therefore, it has a better heat dissipation effect than the above-mentioned multi-layer wire mesh wick and the porous wick produced by the powder sintering process.

The wick 5 shown in Fig. 9 can also be formed in the form shown in Fig. 10. In the figure, the wick of the strip is made of a metal foil in a "V" shape by reciprocating continuous bending, and the surface thereof is also provided with a hole 43; the wick 5 shown in Fig. 9 can also be made as shown in the figure. The form shown in 11. In the figure, the wick of the strip is made of a metal foil in a "Omega" shape by reciprocating continuous bending, and a hole 43 is still formed in the surface. In Figs. 10 and 11, the holes 43 formed in the surface of the wick 5 are used for vaporization and heat dissipation of the liquid working medium.

A plurality of "U" shaped grooves, a plurality of "V" shaped grooves, and a plurality of "Ω" shaped grooves, which are naturally formed by the holes 43 and FIGS. 9, 10, and 11, respectively, can conveniently make the liquid working medium inside thereof. Extend. In order to facilitate vaporization of the liquid and to extend along the direction of the wick of the strip, it is also possible to close the ports of the "U" shaped groove, the "V" shaped groove and the "Ω" shaped groove.

Figure 12 is a schematic view showing the structure of another wick made of a metal foil. In the figure, the wick 5 is composed of a plurality of wick units 54 arranged side by side and made of a metal foil. The wicking unit M is arranged in parallel with each other. The spacing between the wicking units 54 forms a wicking channel 55. The wick unit 54 can be a single upright metal foil. Since the process of manufacturing the individual erected metal foil is complicated, it is possible to provide a negative film 541 at the bottom of the erected metal foil, as shown in FIG. The erected metal foil in the figure is welded to the backsheet 541 and has a cross-sectional shape of "L", so that in production, the wicking unit 54 is less prone to lodging before being brazed. The cross-sectional shape of the wick unit 54 can be made "U" or trapezoidal or semi-circular or triangular or inverted T depending on the different arrangement of the fixed positional relationship between the backsheet 541 and the upright metal foil. The "U" shape is provided with an upright metal foil on the opposite sides of the negative film 541; the trapezoid is to tilt the two upright metal foils to the outside on the "U" shape; On the basis of the "U" shape, the two upright metal foils are simultaneously bent outward into a circular arc shape; the triangle is formed on the basis of the "U" shape to reduce the width of the negative film 541 to form a triangle, but actually The trapezoid has a larger slope; the inverted T-shape is formed by fixing an upright metal foil in the axial direction of the bottom plate 541.

In actual production, since the size of the wick unit 54 is small enough to generate sufficient capillary force, and the side-by-side spacing of the wick unit 54 is also small, it is capable of generating sufficient capillary force, therefore, The flow direction of the liquid working medium can be set in advance by an artificial arrangement, that is, the liquid working medium flows along the wick channel 55 as needed for heat dissipation.

The above wick unit can also be formed by bending a single piece of metal foil. As shown in Figure 14. In the figure, the upright metal foil 542 and the backsheet 541 of the plurality of side-by-side wicking units ⁵⁴ installed in the casing 1 are bent from a single piece of metal foil, and have a cross-sectional shape of "U". In the shape, a wicking channel 55 is formed in each of the wicking units 54 and between the wicking units 54. The liquid medium 3 can flow along the wick channel 55. Due to the low strength of the metal foil, in the actual production, the metal foil is likely to fall, and the width of the local or individual wick channel changes, which affects the heat dissipation performance. In order to prevent this from happening, spacers may be provided between adjacent erected metal foils. In order to facilitate the arrangement of the spacers, spacers may be provided at the end edges of the erected metal foils. Card slot and/or flange, see the partially enlarged wick unit structure shown in FIG.

In Fig. 15, a card slot 5421 and a flange 5422 are formed at the end edge of the upright metal foil 542 of the L-shaped wick unit. Spacer 56 (shown in phantom in the figure) can be easily snapped between adjacent upstanding metal foils 542 through card slots 5421 and flanges 5422.

According to the principle that the wicking unit constitutes a wick, the wick unit can also be formed by bending a single piece of metal foil, as shown in FIG.

In Fig. 16, the wick unit 54 is a wavy metal foil formed by a plurality of round-trip bending of the metal foil, and a plurality of wick channels 55 are formed on the surface thereof, and the wick channel 55 is formed. The axial cross-sectional shape is "U" shape. This method is very convenient for large-scale production of wicks, which is low in cost and difficult to fall. The axial cross-sectional shape of the wicking channel 55 can also be trapezoidal or semi-circular or triangular.

In order to solve the lodging phenomenon of the metal foil, it is also possible to use a method of pressing a bump on the surface of the erected metal foil, as shown in FIG.

In Fig. 17, a plurality of bumps 5423 are provided in the same direction on the surface of the upright metal foil 542 of the plurality of L-shaped wick units 54 arranged side by side. The height of the bumps 5423 is equal to the width of the wick channel 55, which not only increases the heat transfer area of the upright metal foil 542, but also allows each of the upright metal foils 542 to be laterally supported so that it does not A lodging occurs.

In the embodiment shown in Fig. 1, the manufacturing method of the support member 4 can be in various forms, which are respectively illustrated below.

First embodiment of a support member

As shown in Fig. 18, the support member 4 includes an upper connection layer 41 and a lower connection layer 42 for fixing the inner side surface of the connection housing. The upper connection layer 41 and the lower connection layer 42 are connected by a support member 43, so that a space through which a fluid can pass is formed between the upper connection layer 41 and the lower connection layer 42. Upper connection layer 41 is formed by continuous bending of a metal rod. Similarly, the lower connecting layer 42 is also formed by a metal rod extending continuously by bending according to the shape of the upper connecting layer 41. The upper connecting layer 41 is disposed in parallel with the lower connecting layer 42. A plurality of juxtaposed support members 43 are respectively connected to the upper connecting layer 41 and the lower connecting layer 42 through their two ends, and are separated, so that the entire supporting member 4 forms a hollow. Mesh.

The shape of the upper connection layer 41 and the lower connection layer 42 may also be different. The support member 43 can be arranged in a vertical manner, or can be inclined, or a combination of partial vertical and partial inclination. The entire hollow mesh body can be formed into a curved shape, that is, the upper connecting layer 41 and the lower connecting layer 42 can be flat or curved.

Second embodiment of a support member

As shown in Figure 19. The difference between this embodiment and the first embodiment is mainly manifested in the manner in which the upper connecting layer and the lower connecting layer are constructed differently. The upper connecting layer and the lower connecting layer are each composed of a set of parallelly arranged metal rods arranged in parallel, and the outer metal rod 44 and the inner metal rod 45 are arranged in a mutually dislocated manner. A plurality of support members 43 are connected in a figure-eight shape between the outer metal rod 44 and the inner metal rod 45. The support member 43 is formed by continuously bending a metal rod in actual processing, which not only facilitates the processing and production, but also provides a higher support strength for the entire apparatus.

In use, the outer metal rod 44 and the inner metal rod 45 are welded to the inner side surface of the casing to obtain good support of the casing, and at the same time, due to the use of the metal rod, it is in contact with the inner side surface of the casing. At the time, the contact is presented so that the incomplete bonding phenomenon does not occur due to the unevenness of the surface of the casing.

Third embodiment of a support member

The difference between this embodiment and the above two embodiments is that the upper connecting layer and the lower connecting layer are made of metal sheets arranged in parallel with each other, as shown in FIG. The outer metal sheet 46 and the inner metal sheet 47 may be brazed to the inner side surface of the casing, respectively, when installed. Since the casing of the heat pipe is made of metal foil, when the outer metal piece 46 and the inner metal piece 47 are brazed and fixed inside the casing, the thickness of the casing can be thickened in sections, and the casing is reinforced. Strength has some help. This embodiment differs from the above three embodiments in form, as shown in FIG. In the figure, the support member 4 is made of a single piece of metal, a plurality of through holes 48 are punched out in advance on the metal piece, and then the metal piece is continuously bent in accordance with the triangular tooth shape. The plurality of convex outer edges 411 formed in parallel with each other formed after bending are like the outer metal rods 44 of the second embodiment described above, and the plurality of concave outer edges 421 are like the inner metal rods 45. The portion between the laterally aligned through holes 48 in the drawing forms a support portion 49 as in the support member 43 of the above embodiment. A plurality of through holes 48 enable fluid to pass through the space formed by the raised outer edge 411 and the recessed outer edge 421.

The shape of the through hole 48 can be various shapes, and the density can be adjusted according to actual needs. The shape of the support portion 49 can be formed into various forms due to the change in the shape of the through hole 48, but the principle is the same as that of the above three embodiments, and its use effect is similar, but the manufacturing cost is low. In order to reduce the weight, the present embodiment is made of a thin metal sheet, and can be improved by punching four marks 491 on the surface of the metal sheet in order not to lower the strength of the embodiment itself.

In the present invention, in addition to the above-described manner, the support member may be obtained by spiral winding using a wire. The wire-wound support member not only supports the support, but also facilitates mass production and is inexpensive. The specific structure thereof will be further described by the following examples.

Fifth embodiment of the support member

The support member 4 shown in Fig. 22 is formed by spirally winding a wire in a rectangular manner in the direction of an axis A in the drawing, and has a space 404 between each of the wires.

In the case of winding the present invention, the shape of the shaft cross-section can be made into various forms according to the shape of the casing of the specific heat pipe heat sink and the structural characteristics, and the winding method can be various.

In this embodiment, the projection between the lower wire segment 401 and the upper wire segment 40 ² has an oblique angle, and the side wire segments 403 which are erected on both sides are perpendicular and parallel to each other, thereby forming A spiral support frame extending in the direction of the axis.

Sixth embodiment of a support member

Fig. 23 shows another embodiment in which the support member 4 has a rectangular cross-sectional shape. The implementation The difference from the embodiment shown in Fig. 22 is that the projection between the lower wire segment 401 and the upper wire segment 402 coincides and the wire extension 405 is vertically bent and then parallel to the axis A. After extending an interval 404, the upper rectangle is bent upward to form a spiral support frame extending in the direction of the axis A.

Seventh embodiment of the support member

Fig. 24 shows a specific embodiment in which the support member 4 has a triangular cross-sectional shape. The shape of the filaments is the same triangle.

In the present invention, the axial cross-sectional shape of the support member 4 can also be made into a trapezoidal shape, a circular shape or any other shape. Further, the cross-sectional shape of the wire constituting the support member may be different shapes as needed, and may be circular, triangular or rectangular. The axial direction of the support member can also be linear or curved as needed to make the formed spiral support frame linear or curved.

Since the thickness of the plate heat pipe radiator is generally thin, the support member can be made small, when the spacing of the support members and the size of the pores are small to some extent, that is, when the support members are densely arranged, the support members themselves It also has the capillary force of the wick, so that only the support member can achieve the dual effect of supporting and adsorbing the liquid working medium. When the support member is made of a specific material (such as a metal foil) and is made of a specific structure (such as a channel), it also has the function of guiding the flow of the liquid working medium or separating the liquid working medium, so that each part is separated by the liquid working medium. It flows according to pre-designed channels and directions to meet the special requirements of heat dissipation in specific environments.

In the present invention, the wick can also function as a supporting member. When it is made of a metal foil and brazed to the upper and lower surfaces of the inner side of the casing, the inner rib of the casing is formed, so that the overall strength of the casing is obtained. improve.

The specific use of the support member and the wick is flexible according to the specific heat dissipation environment and heat dissipation requirements. They can be used individually or in combination, and can be partially installed or fully installed.

Finally, it is worth noting that the heat absorbing end surface pre-arranged on the outer side of the bottom surface of the casing mentioned in the present invention can further improve the heat dissipation efficiency of the present invention by further improvement. The production method is: in the manufacturing process, the endothermic end face is cut by punching to make a 3⁄4 opening, and then the same heat-generating electronic component (such as a chip, a high-power semiconductor tube, etc.) having the same shape as the opening is formed. The heating surface is embedded in the opening and the surrounding gap is closed, so that the heating surface of the heat-generating electronic component is directly immersed in the liquid working medium, the thermal resistance is greatly reduced, and the heat dissipation efficiency is improved.

A further improvement is that, in the production process of the heat-generating electronic component, the working circuit surface of the heat-generating electronic component without the outer casing is directly mounted on the above-mentioned manner by punching, the heat-absorbing end face is cut off, and the opening of the invention is formed. Inside the housing, the opening is closed and the surrounding gap is closed. Thus, the heating circuit on the heat-generating electronic component is directly immersed in the liquid working medium, and all the heat generated during the operation will be dispersed at the first moment. Therefore, the heat dissipation efficiency of the heat pipe radiator is greatly improved again. When this method is used for improvement, insulation must also be performed, and the liquid working fluid must also be electrically insulating and chemically insulating.

Claims

Rights request

What is claimed is: 1. A plate type heat pipe radiator comprising a flat plate-shaped closed casing, the casing being made of a thin metal plate, the inner cavity being vacuumed and filled with a liquid working medium having heat vaporization characteristics, characterized in that An outer end surface of the outer surface of the housing is provided with an endothermic end surface for absorbing heat on the surface of the heat-generating electronic component; a support member is disposed in the inner cavity of the housing, and the support member and the shell The inner side surface of the body is brazed to eliminate deformation of the housing caused by pressure generated by external atmospheric pressure or vaporization of the internal liquid medium, enhancing the overall strength of the housing.

2. The plate heat pipe heat sink according to claim 1, wherein the casing is formed by two metal sheets which are pre-stamped to form a bent edge; the bent edges of the two metal sheets are passed through the brazing Welding connection.

The heat pipe heat sink according to claim 2, wherein the bent edge of the metal thin plate is further provided with a flange corresponding to the matching engagement or a bayonet corresponding to the concave and convex matching buckle. Corresponding to the flange and the card slot.

A plate type heat pipe heat sink according to claim 1, wherein said housing has a rectangular cross section or a cross shape.

The plate type heat pipe heat sink according to claim 1, wherein a plurality of heat dissipating fins made of a metal foil are disposed on an outer surface of the casing.

A plate type heat pipe heat sink according to claim 5, wherein said heat radiating fins are fixedly disposed on an upper surface of said casing by brazing.

The heat pipe fin heat exchanger according to claim 5, wherein the heat dissipating fin is a corrugated plate formed by continuously bending a metal foil, and the cross section of the corrugated plate is continuously connected. "U" or "V" or trapezoidal or arcuate.

8. The plate heat pipe heat sink according to claim 5, wherein the plurality of heat dissipating fins are disposed in parallel spaced apart or radially spaced or spirally spaced.

The heat pipe heat exchanger according to claim 1, wherein the housing is further provided with a heat dissipation fan, and the heat dissipation fan is disposed on an upper surface of the housing or disposed on the housing. The pre-pressed heat dissipating fan mounting recess is provided in the mounting through hole provided in the housing.

The heat pipe heat sink according to any one of claims 1 to 9, wherein the heat absorbing end surface is a predetermined flat area on the outer side of the bottom surface of the casing, or the bottom of the casing. A circular or rectangular or triangular platform that faces outward.

A plate type heat pipe heat sink according to claim 10, wherein said heat absorbing end surface is integrally formed with said bottom surface of said casing.

The heat pipe heat sink according to any one of claims 1 to 9, characterized in that the inner surface of the casing is further provided with a liquid absorbing core, the liquid absorbing core has a liquid adsorbing liquid on the liquid absorbing core. Stretching capillary force.

A plate type heat pipe heat sink according to claim 12, wherein said wick is applied to said heat absorbing end surface on an inner side surface of said casing.

The plate heat pipe heat sink according to claim 12, wherein the wick is composed of a multi-layer fiber woven mesh or a multi-layer wire mesh stack, or is microporous made by powder sintering. The plate shape.

A plate type heat pipe heat sink according to claim 12, wherein said wick is a strip-shaped body formed by reciprocating continuous bending or bending of a metal foil; said metal foil surface is opened The holes are attached to the inner wall of the casing by welding or bonding.

The plate type heat pipe heat sink according to claim 15, wherein said strip-shaped body is formed by reciprocating bending or bending of said metal foil in accordance with a "U" shape or a "V" shape or an "Ω" shape. The strip is formed with a plurality of "U" shaped grooves or "V" shaped grooves or "Ω" shaped grooves.

The plate heat pipe heat sink according to claim 12, wherein said wick is composed of a plurality of wicking units arranged side by side and made of a metal foil; said wick unit Arranged at intervals; the spacing between the wick units forms a wick channel.

A plate type heat pipe heat sink according to claim 17, wherein said wick unit has an axial cross-sectional shape of "I" or "L" or a trapezoidal or semicircular or three-dimensional shape. Angled or inverted T-shaped.

A plate type heat pipe heat sink according to claim 17, wherein said wick unit is formed by bending a single piece of metal.

A plate type heat pipe heat sink according to claim 17, 18 or 19, characterized in that the end edge of the metal foil is provided with a card slot or flange for the spacer to be engaged therewith.

The plate type heat pipe heat sink according to claim 17, wherein the wick unit is a wavy metal foil formed by the metal foil after repeated round-trip bending, and the surface thereof is formed. A plurality of channels, the channel having an axial section of "U" or trapezoidal or semi-circular or triangular.

A plate heat pipe heat sink according to claim 17, wherein said metal foil sheet is press-fitted with one or more bumps or ribs.

A plate type heat pipe heat sink according to any one of claims 1 to 9, wherein said support member includes an upper connection layer and a lower connection layer for brazing the inner side surface of said case; said upper connection A layer is connected between the layer and the lower connecting layer by a support to form a space between the upper connecting layer and the lower connecting layer to allow a fluid to pass therethrough.

A plate type heat pipe heat sink according to claim 23, wherein said upper connecting layer is formed by continuously bending and extending a metal rod, and said upper connecting layer has a planar shape or a curved shape.

The plate heat pipe heat sink according to claim 23, wherein said upper connecting layer is formed by a set of metal rods arranged in parallel with each other, said upper connecting layer being a flat surface or a curved surface dog .

A plate type heat pipe heat sink according to claim 23, wherein said upper connecting layer is formed by a set of metal sheets distributed in parallel with each other, said upper connecting layer being flat or curved. .

The plate type heat pipe heat sink according to claim 24, 25 or 26, wherein said lower connecting layer is formed by continuously bending and extending a metal rod, or a group of metal rods arranged in parallel with each other. a distribution of extended arrangements, or a set of metals placed parallel to each other The sheet is distributed and arranged in an array, and the lower connecting layer has a planar shape or a curved surface.

28. The plate heat pipe radiator to claim 24, ²⁵ or claim ^26, characterized in that the supporting member composed of a plurality of metal rods, a plurality of metal rods arranged distributed in the upper layer and the lower connecting layer is connected between.

The plate heat pipe heat sink according to claim 24, 25 or 26, wherein said support member is a metal rod, and said one metal rod is continuously bent between said upper connecting layer and said lower connecting layer A bending point extending through and formed is connected to the upper connecting layer and the lower connecting layer.

30. The plate heat pipe heat sink according to claim 23, wherein said upper connecting layer is formed by a combination of a plurality of raised edges formed by reciprocating continuous bending of the metal piece; said metal piece passing The outer side of the plurality of concave edges formed after the reciprocating continuous bending constitutes the lower connecting layer; the supporting member is a metal piece connecting the outer edge of the convex portion and the outer edge of the concave portion, and the metal piece is provided with a through hole A passage is formed between the outer edge of the projection and the outer edge of the recess to allow fluid to pass therethrough.

A plate type heat pipe heat sink according to claim 30, wherein said upper connecting layer and said lower connecting layer are planar or curved.

A plate type heat pipe heat sink according to claim 30 or 31, wherein said plurality of through holes are plural in shape and are circular or square or triangular in shape.

A plate type heat pipe heat sink according to any one of claims 1 to 9, wherein said support member is spirally wound around a wire by a wire loop, and each of the wires has a space therebetween.

A plate type heat pipe heat sink according to claim 33, wherein said wire has a rectangular or circular or triangular sectional shape.

A plate type heat pipe heat sink according to claim 33, wherein said cylindrical body has a circular or rectangular or triangular sectional shape.

A plate type heat pipe heat sink according to claim 34 or 35, wherein said cylindrical body is linear or curved.