CN112484544A

CN112484544A - Non-directional soaking plate

Info

Publication number: CN112484544A
Application number: CN202011136174.2A
Authority: CN
Inventors: 赵英琇; 朴相洙
Original assignee: Cgi Corp
Current assignee: Cgi Corp
Priority date: 2019-10-30
Filing date: 2020-10-22
Publication date: 2021-03-12

Abstract

The invention provides a non-directional soaking plate, which comprises: an upper plate having a first structural surface; a lower plate having a second structure surface facing the first structure surface; a macro channel formed on at least one of the first structural surface and the second structural surface by an etching process, and formed with a passage enabling an operating fluid in a vapor phase to flow from the evaporation portion to the condensation portion based on thermal energy; and a microchannel formed on at least one of the first structural surface and the second structural surface by an etching process, having a groove having a width smaller than that of the microchannel, and disposed at a position between two adjacent macrochannels, and further having a passage capable of moving a liquid-phase operating fluid from the aggregation part to the evaporation part by a capillary force; the macro-channels include outer heat-emitting channels occupying at least a portion of outermost channels on the upper or lower plate.

Description

Non-directional soaking plate

Technical Field

The present invention relates to a non-directional vapor chamber for releasing heat from a heat source.

Background

A Vapor Chamber (Vapor Chamber) is a device that removes heat from an object using latent heat at the time of Phase Transition before liquid and gas change. The soaking plate has such an advantage that heat can be rapidly removed and discharged from the object, as a means different from a heat transfer system (conduction, convection, radiation) in a general state.

Most of the existing soaking plates are designed to run in a single direction. Specifically, the heat source is located at a lower portion of the chamber, and a condensation section (condensation section) provided at an upper portion of the chamber condenses the gas vaporized by the heat source into a liquid after the gas rises. The flocculated liquid again drips to the heat source side of the lower part based on gravity.

In contrast, a wick (wick) made of a fiber material may be used in order to operate the vapor chamber without being limited by the orientation. However, the wick made of a fibrous material needs to be manufactured by heat treatment (ionization, high-temperature heating), and the thickness of the product is too thick, and the process is expensive to manufacture, which has such disadvantages.

Also, a heat pipe (heat pipe) similar to the vapor chamber is mostly formed of a cylindrical copper pipe and widely used in cooling devices for electronic instruments. Recently, demand for ultra-thinning and thin profile has been increasing, and a cylindrical copper heat pipe or a vapor chamber is pressed and flattened to manufacture and use a product. However, these thicknesses reach the level of 2.0mm, and the need for ultra-thinning has reached technical limitations compared to thickness. It is difficult to control the thickness of the product to 1mm or less in manufacturing. Also, in the process of welding the upper and lower plates to each other, the increase in manufacturing time and the plastic deformation caused by overheating may also cause problems such as a soft nitriding problem.

Disclosure of Invention

(problem to be solved)

The invention aims to provide a non-oriented soaking plate, which reduces the thickness to the minimum through a thinning process so as to achieve the effect of maximizing heat release.

Another object of the present invention is to provide a non-oriented soaking plate manufactured by a thinning process, which can prevent the structural strength from being lowered in use.

(means for solving the problems)

In order to successfully solve the above problems, the present invention provides a non-oriented vapor chamber, comprising: an upper plate having a first structural surface; a lower plate having a second structure surface facing the first structure surface; a macro channel formed on at least one of the first structural surface and the second structural surface by an etching process, and formed with a passage enabling an operating fluid in a vapor phase to flow from the evaporation portion to the condensation portion based on thermal energy; and a microchannel formed on at least one of the first structural surface and the second structural surface by an etching process, having a groove having a width smaller than that of the microchannel, and disposed at a position between two adjacent macrochannels, and further having a passage capable of moving a liquid-phase operating fluid from the aggregation part to the evaporation part by a capillary force; the macro-channels include outer heat-emitting channels occupying at least a portion of outermost channels on the upper or lower plate.

Here, the upper plate and the lower plate are each formed of a quadrangle having four sides, and the outer heat radiation channel occupies all of outermost channels of the four sides of the upper plate or the lower plate and surrounds the microchannel.

Here, at least one of the upper plate and the lower plate further includes a space maintaining protrusion formed to protrude in the macro channel to maintain a state in which the upper plate and the lower plate are spaced apart from each other.

Here, the interval maintaining protrusions may be provided in plural numbers, and arranged in one direction to form a zigzag shape.

Here, the upper plate and the lower plate may have different thicknesses.

Here, the macro-channels and the micro-channels are alternately arranged side by side on one of the upper plate and the lower plate; the other of the upper plate and the lower plate includes a scratch field thereon having a scratch groove of a smaller width than the microchannel.

Here, the scratch region corresponds to a region where the macro channel and the micro channel are formed.

Here, the scratch groove is manufactured by performing an operation of contacting and rotating a metal brush to the other of the upper and lower plates.

Here, the upper plate and the lower plate respectively further include: a welding groove formed on the outer surface; the upper plate and the lower plate are welded and joined to each other by irradiating the welding groove with laser light.

(Effect of the invention)

As described above, the non-oriented vapor chamber according to the present invention is formed by performing an etching process on at least one of the first structure surface of the upper plate and the second structure surface of the lower plate to form macro-channels and micro-channels, thereby reducing the thickness of the non-oriented vapor chamber as a whole.

Still further, the macro-channels occupy at least a portion of the outermost channels of the upper or lower plate, and allow the vapor-phase operating fluid to flow continuously, thereby allowing the heat possessed by the operating fluid to be efficiently released to the outside.

Further, since the upper plate and the lower plate are fused to each other by welding, the strength of the entire upper plate and the entire lower plate is prevented from being lowered by the influence of heat during the manufacturing process.

Also, the interval maintaining protrusions formed on the macro-channels can suppress the pressing of the upper and lower plates during use.

Drawings

Fig. 1 is a schematic exploded perspective view illustrating a non-directional soaking plate 100 according to an embodiment of the present invention.

Fig. 2 is a detailed sectional view illustrating an assembled state of the non-oriented soaking plate 100 in fig. 1.

Fig. 3 is an exploded view of the completed non-oriented vapor chamber 100' based on a modified embodiment of the non-oriented vapor chamber 100 of fig. 2.

Fig. 4 is a detailed sectional view illustrating a non-directional soaking plate 200 according to another embodiment of the present invention.

Fig. 5 is an exploded sectional view illustrating the non-oriented soaking plate 200 in fig. 4.

Fig. 6 is a detailed cross-sectional view of a non-directional soaking plate 300 according to another embodiment of the present invention.

(reference numerals)

100, 100',200, 300: non-directional soaking plate

110, 210, 310: upper plate

130, 230, 330: lower plate

150, 250, 350: macro channel

170, 270, 370: micro-channel

390: field of scratches

Detailed Description

Hereinafter, a non-directional soaking plate according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present specification, the same or similar reference numerals are assigned to the same or similar structures even in embodiments different from each other, and the description of these portions will be replaced with the original description.

As can be seen from the drawings, the non-directional soaking plate 100 is integrally formed by bonding the upper plate 110 and the lower plate 130.

The upper plate 110 and the lower plate 130 are each formed of a flat plate having a rectangular shape. The structure may be made of a metal material, for example, a copper alloy. The upper plate 110 and the lower plate 130 may have the same size and shape as a structure that is coupled to each other in an overlapping manner.

The opposing surfaces between the upper plate 110 and the lower plate 130 are respectively constituted by a first structure surface 111 and a second structure surface 131. On the opposite side, a macro-channel (150, see fig. 2) or the like structure may be fabricated by an etching (etching) process. The surfaces exposed to the outside of the upper plate 110 and the lower plate 130 are respectively constituted by a first exposed surface 112 and a second exposed surface 132. In addition, injection

port forming portions

113 and 133 are formed to protrude at one corner of the upper plate 110 and the lower plate 130. The injection

port forming portions

113 and 133 are cut off after the operation fluid is injected into the macro channel 150.

The specific structure of the non-oriented soaking plate 100 will be described in detail with reference to fig. 2. Fig. 2 is a detailed sectional view illustrating the non-oriented soaking plate 100 in fig. 1 in an assembled state.

Referring to this figure, to join the upper and

lower plates

110, 130,

weld grooves

114, 134 are formed along the edges of the first and second exposed

surfaces

112, 132. The

weld grooves

114, 134 may be fabricated by an etching process of the upper plate 110 and the lower plate 130. The

welding grooves

114 and 134 may be welded by irradiating laser to weld the upper plate 110 and the lower plate 130, thereby completing welding. By the above fusion bonding, thermal deformation at the fusion point and around can be minimized, and plastic deformation (tufftride) of the upper plate 110 and the lower plate 130 due to thermal deformation can be suppressed while improving the weldability. This can maintain not only the original rigidity of the thin non-oriented soaking plate 100 but also higher elasticity than the original.

The macro-channel 150 and the micro-channel 170 may be formed by an etching process of the first structure surface 111 and the second structure surface 131. The macro vias 150 and the micro vias 170 are alternately arranged in a state of being side by side with each other. In the present embodiment, there are 4 macrochannels 150 and 3 microchannels 170. The micro-vias 170 are disposed at a location between an adjacent pair of macro-vias 150.

The macro channel 150 is a structure formed by an etching process performed on the first structure surface 111 and the second structure surface 131. The heights of the first structure surface 111 and the second structure surface 131 when etched may be the same. This part of the structure forms a passage for allowing the vapor phase operating fluid to flow from the evaporation portion (EZ, see fig. 3) to the condensation portion (CZ, see fig. 3) due to thermal energy.

The macro channel 150 is formed with

interval maintaining protrusions

115, 135 therein. The

space maintaining protrusions

115, 135 are formed of a portion that is not etched in the etching process. The

interval maintaining protrusions

115 and 135 are formed on the upper plate 110 or the lower plate 130, respectively, and may have the same height. The interval-maintaining

protrusions

115 and 135 may prevent the upper plate 110 and the lower plate 130 from being compressed against each other by an external force, so that the macro-channel 150 maintains its stable shape. The external force referred to herein is an external force acting from the outside to the inside of the non-directional soaking plate 100 with respect to the vacuum inside the macro channel 150. In the present figure, the

space maintaining protrusions

115 and 135 are only conceptually identified, and the specific form can be understood with reference to the content of fig. 3.

The outermost channel of the macro-channels 150 may be referred to as an outer heat release channel 155. The vapor phase operating fluid efficiently releases thermal energy to the outside by the action of the outer heat release channel 155 located at the outermost side of the non-directional soaking plate 100. The outer heat release channels 155 may occupy all or a portion of the outermost channels.

The micro channel 170 is also a structure formed by an etching process of the first structure surface 111 and the second structure surface 131. The height of the micro channel 170 may be the same when etching the first structure surface 111 and the second structure surface 131, similarly to the above case. This part of the structure is used to form a passage for returning the liquid-phase operating fluid from the condensation section (CZ) to the evaporation section (EZ) by capillary force. In order to allow capillary forces to continue properly, the microchannels 170 have grooves of finer width than the macrochannels 150. Based on the capillary force, the liquid-phase operating fluid moves into the groove without being influenced by gravity. In the present embodiment, 2-5 grooves are formed in one microchannel 170.

The structure of the added portion will now be described with reference to fig. 3, taking as an example a non-oriented soaking plate 100' actually manufactured. Fig. 3 is an exploded view of the completed non-oriented vapor chamber 100' based on a modified embodiment of the non-oriented vapor chamber 100 of fig. 2.

Referring to this drawing, the upper plate 110 and the lower plate 130 are respectively provided in a quadrangular shape of 4 sides, and the outer heat discharging channel 155 may occupy the entire outermost channels with respect to the 4 sides of the upper plate 110 and the lower plate 130. Based on the above structure, the micro channel 170 exists like a small island in the enclosed area due to the outer heat release channel 155. Thus, the heat energy held by the vapor-phase operating fluid can be more efficiently released to the outside from the outer heat release channels 155 on the respective sides.

The

space maintaining protrusions

115, 135 may be provided in plural in the macro-channel 150. The

interval maintaining protrusions

115, 135 may be substantially in the shape of a cylinder, a quadrangular prism, a hemisphere, or the like. The

space maintaining protrusions

115 and 135 may be arranged in a zigzag pattern or a lattice pattern in one direction. Thus, the vapor-phase operating fluid is not limited to the direction in which the macro-channels 150 extend, and can be diffused in the direction intersecting the above direction. Further, the

space maintaining protrusions

115 and 135 are not continuous protrusions extending to form walls, but are fixed in a cylindrical shape or the like, and thus a larger space can be secured compared to a criminal wall.

Referring now to fig. 4 and 5, another embodiment of the non-directional soaking plate 200 will be described. Fig. 4 is a detailed sectional view illustrating a non-directional soaking plate 200 according to another embodiment of the present invention. Fig. 5 is an exploded sectional view illustrating the non-oriented soaking plate 200 in fig. 4.

Referring to the present drawing, the non-directional soaking plate 200 is substantially the same as the above-mentioned non-directional soaking plate 100 in its basic structure, but the upper plate 210 and the lower plate 230 are asymmetrical to each other in structure, and there is a difference in this point.

First, the upper plate 210 has a thicker thickness than the lower plate 230. For example, if the thickness of the upper plate 210 is 0.25mm, the thickness of the lower plate 230 may be 0.1 mm. Therefore, the entire thickness of the non-oriented soaking plate 200 can be as thin as about 0.4 mm. Further, the upper plate 210 or the lower plate 230 may be formed to have a width of 15-200mm and a length of 40-200 mm. In order to ensure that the general copper vapor chamber is not influenced by the running characteristics along the gravity direction, the copper vapor chamber is manufactured by a sintering (sintering) process or a wick (wick), but the manufacturing process cannot be finished to the thickness of less than 1.0mm, so that only products reaching the level of 2.5mm are actually produced in mass and are sold on the market. The non-oriented vapor chamber 200 of the present embodiment has a vapor chamber thickness of less than 1.0mm, and even 0.4mm or less, and ensures good running characteristics.

Due to the difference in thickness between the upper plate 210 and the lower plate 230, the height of the etching performed thereon to fabricate the macro-channels 250 as the micro-channels 270 may also be different. For example, if the upper plate 210 is etched by 0.17mm, the etching height on the lower plate 230 may be 0.05 mm. Also, if the width of the macro-channel 250 is 4 to 5mm, the width of the groove on the micro-channel 270 may be 0.01 to 0.1 mm. Further, the width of the spacing maintaining protrusions 215, 235 on the macro-channel 250 may be maintained at a level between 0.3mm and 0.5 mm.

Finally, another embodiment of the soaking plate 300 will be described in detail with reference to fig. 6. Fig. 6 is a detailed cross-sectional view of a non-directional soaking plate 300 according to another embodiment of the present invention.

Referring to the present figure, the basic structure of the non-directional thermal spreader 300 is substantially the same as that of the non-directional thermal spreader 200 mentioned above, but the macro-channels 350 and micro-channels 370 are differently formed in the lower plate 330.

Specifically, the lower plate 330 may have a thicker thickness than the upper plate 310. On such a lower plate 330, macro-channels 350 and micro-channels 370 are formed. For this purpose, it is possible to complete the etching of the respective macro-channels 350 and micro-channels 370 only on the second structure plane 331. Thus, the macro-channels 350 and micro-channels 370 may be arranged alternately side-by-side on the lower plate 330.

Unlike the lower plate 330, the upper plate 310 may have a scratch region 390 formed thereon. The scratch region 390 is formed with scratch grooves finer than those of the micro channel 370. The scratch groove is formed under a mechanical force of rotation after contacting the metal brush on the first structure surface 311 of the upper plate 310. The grooves formed by the brush are formed in random natural shapes without directionality. The scribe region 390 corresponds to a region where the macro channel 350 and the micro channel 370 are formed, and is formed on the first structure surface 311 as a whole.

With the above-described structure, the entire performance can be improved without increasing the entire thickness by the scratch region 390 formed in the relatively thin upper plate 310. Since the scribe region 390 is formed in the entire region, the operating fluid condensed from the macro channel 350 rapidly moves to the heat generating portion through the scribe region 390 or moves to the heat generating portion through the micro channel 370. In such a case, the circulation of the evaporation and coagulation of the operating fluid can be better carried out, increasing the efficiency of heat release.

The non-directional vapor chamber as described above is not limited to the structure and operation of the above-described embodiment. In the above embodiments, all or a part of them may be selectively combined and modified to perform the corresponding functions.

Claims

1. A non-directional vapor chamber, comprising:

an upper plate having a first structural surface;

a lower plate having a second structure surface facing the first structure surface;

a macro channel formed on at least one of the first structural surface and the second structural surface by an etching process, and formed with a passage enabling an operating fluid in a vapor phase to flow from the evaporation portion to the condensation portion based on thermal energy; and

a microchannel formed on at least one of the first structural surface and the second structural surface by an etching process, having a groove having a width smaller than that of the microchannel, and disposed at a position between two adjacent macrochannels, and further having a passage formed therein through which a liquid-phase operating fluid can move from the aggregation portion to the evaporation portion by capillary force;

the macro-channels include outer heat-emitting channels occupying at least a portion of outermost channels on the upper or lower plate.

2. The non-directional vapor chamber according to claim 1,

the upper plate and the lower plate are each formed of a quadrangle having four sides,

the outer heat release channel occupies all of the outermost channels on the four sides of the upper plate or the lower plate and forms a structure surrounding the micro channel.

3. The non-directional vapor chamber according to claim 1,

at least one of the upper plate and the lower plate further includes a space maintaining protrusion formed to protrude in the macro channel to maintain a state where the upper plate and the lower plate are spaced apart from each other.

4. A non-oriented vapor chamber according to claim 3,

the interval maintaining protrusions are provided in plurality and arranged in one direction to form a zigzag shape.

5. The non-directional vapor chamber according to claim 1,

the upper plate and the lower plate have different thicknesses.

6. The non-directional vapor chamber according to claim 1,

the macro-channels and the micro-channels are alternately arranged side by side on one of the upper plate and the lower plate;

the other of the upper plate and the lower plate includes a scratch field thereon having a scratch groove of a smaller width than the microchannel.

7. The non-directional vapor chamber according to claim 6,

the scratch region corresponds to a region where the macro channel and the micro channel are formed.

8. The non-directional vapor chamber according to claim 6,

the scratch groove is manufactured by performing an operation of contacting and rotating a metal brush to the other of the upper plate and the lower plate.

9. The non-directional vapor chamber according to claim 1,

the upper plate and the lower plate further include: a welding groove formed on the outer surface;

the upper plate and the lower plate are welded and joined to each other by irradiating the welding groove with laser light.