KR20100111101A - Heatpipe having a base block and manufacturing method of the heatpipe - Google Patents

Abstract

PURPOSE: A heat-pipe having a base block and manufacturing method of the heat-pipe are provided to help a user to manufacture the device by forming the base block with the heat-pipe as one body. CONSTITUTION: The base block(10) mounted on a heating element. At least one(20) is formed on the base block and has a certain cross section area. A tube element(30) has one side which is combined with the entrance of a hole and has the other side is sealed. A wick is provided on the inner side of the hole in the base block.

Description

Heat pipe having a base block and a method for manufacturing the same {Heatpipe having a base block and manufacturing method of the heatpipe}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pipe having a base block, and more particularly, in a heat pipe used in a cooling device for cooling a heat generating part embedded in an electric product such as a computer, a base mounted to be in contact with the heat generating part. The present invention relates to a heat pipe having a heat transfer block having a block integrated therein to improve heat transfer efficiency.

The present invention also relates to a cooling device comprising a heat pipe having the base block.

The present invention also relates to a method for manufacturing a heat pipe having the base block.

Inside the electrical and electronic products, heat generating parts that generate heat during operation are embedded. Especially inside the computer, there are representative heating components such as a central processing unit (CPU) mounted on a motherboard or a chipset mounted on a board of a graphic adapter. Various types of cooling devices are currently used to cool the heat of the heat generating parts. In particular, a recent cooling device has been used a lot of configurations employing heat pipes that are significantly superior in thermal conductivity compared to other materials, and heat radiation fins coupled to the heat pipes to dissipate heat to the outside.

However, since the heat pipe employed in such a conventional cooling apparatus has a small diameter and long pipe shape, in order to receive heat from the heat generating parts, a heat sink mainly adopts a hexahedral base block to receive heat as an intermediate medium. there was. Since the conventional heat pipe is a pipe having a small diameter, it is difficult to directly fix the heat pipe having a flat upper surface.

Recently, there have been attempts for a cooling apparatus that is configured to flatten one end of a heat pipe to directly contact a heating element. However, since this also uses a heat pipe having a small diameter, a base block should be used as a separate part. There is a problem that there is a complexity and one end of the flattened heat pipe causes deformation due to the restoring force, so that the durability of the cooling device cannot be guaranteed.

The present invention is to solve the above problems, by improving the shape to include a base block as a part of the heat pipe, without having a separate base block, the heat having a base block that can receive heat directly from the heat generating parts The purpose is to provide a pipe.

Another object of the present invention is to provide a method for producing a heat pipe having a base block.

Another object of the present invention is to provide a cooling device including a heat pipe having a base block.

Heat pipe having a base block according to the present invention, the base block is mounted in contact with the heat generating parts; At least one hole formed in the base block and having a constant cross section; And one end is coupled to the inlet of the hole and the other end is configured to include a sealed tubular member, the inner surface of the hole of the base block is characterized in that the wick (wick) is provided.

On the other hand, the wick formed on the inner surface of the hole of the base block is any one of the sintered wick formed by sintering the metal powder, the groove wick made of a plurality of grooves (groove) formed in the longitudinal direction, the mesh wick formed of a mesh member desirable.

In addition, it is preferable that a groove wick made of a plurality of grooves formed in the longitudinal direction is formed on the inner surface of the tubular member.

On the other hand, a plurality of holes of the base block is provided, the base block is formed with a cutaway groove cut in the longitudinal direction at both ends of the portion between the plurality of holes, the branch portion separated by the cut groove is the outer side The side of the end is bent to face upward, and the hole is preferably formed on the side of the outer end of the branch.

In addition, the hole of the base block has a long cross-sectional shape, a plate member having a plurality of through holes communicating with the hole is coupled to the hole of the base block, the through hole of the plate member is the tubular It is preferable that one side end of the member is coupled.

Heat pipe having a base block according to another aspect of the present invention, the base block is mounted to contact the heat generating parts; At least one hole formed in the base block and having a constant cross section; And at least one tubular member having at least a portion inserted therein, wherein the inner surface of the tubular member is provided with a sintered wick formed by sintering metal powder, and the tubular member inserted into the hole. The outer surface of the insertion portion of the, characterized in that the close contact with the inner surface of the hole.

On the other hand, the outer surface of the insertion portion of the tubular member and the inner surface of the hole, it is preferable that the insertion portion is expanded after the insertion portion is inserted into the hole or the hole is concentrically coupled, mutually in close contact.

In addition, the hole is formed so as to penetrate from one side of the base block to the other side, the tubular member, the insertion portion is preferably provided in the middle portion.

On the other hand, the cooling device according to another aspect of the present invention, a cooling device comprising a heat pipe and a heat dissipation unit, the heat pipe, the base block is mounted so as to contact the heat generating parts; At least one hole formed in the base block, the cross section of which is constantly extended, the inner surface having a wick; And a heat pipe having a base block configured to include a tubular member whose one end is coupled to the inlet of the hole and the other end thereof is sealed, and the heat dissipation unit is a heat dissipation unit coupled to the tubular member.

According to another aspect of the present invention, there is provided a cooling apparatus including a heat pipe and a heat dissipation unit, wherein the heat pipe includes: a base block mounted to be in contact with a heat generating part; At least one hole formed in the base block and having a constant cross section; And at least one tubular member having a sintered wick formed by inserting at least a portion of the insertion portion into the inner side of the hole so that the outer side thereof is in close contact with the inner side of the hole and the metal inner side is sintered on the entire inner side thereof. It is a heat pipe having a base block composed of; The heat dissipation portion, characterized in that the heat dissipation portion coupled to the tubular member.

According to another aspect of the present invention, there is provided a method of manufacturing a heat pipe having a base block, the hole forming step of forming at least one hole in a side surface of a metal base block; Inserting a mandrel in the hole, filling the metal powder in the space between the inner wall surface of the hole and the mandrel, and then heating to sinter the metal powder to form a sintered wick to remove the mandrel Sintering wick forming step; A tubular member coupling step of joining a tubular member having a groove wick formed of a plurality of grooves formed in a longitudinal direction on an inner side thereof with an inner cross-sectional shape identical to that of the hole; And a sealing and vacuum step of injecting a working fluid into the entire inner space including the inner surface of the tubular member and the inner surface of the hole, and sealing and vacuuming the entire inner space.

According to another aspect of the present invention, there is provided a method for manufacturing a heat pipe having a base block, the hole forming step of forming at least one hole in a side of a base block made of a metal material; A tubular member insertion step of inserting a tubular member into the hole; A close coupling step of closely inserting an insertion portion inserted into the hole of the tubular member into an outer surface of the insertion portion and an inner surface of the hole; A mandrel is inserted into the tubular member, a metal powder is filled in the space between the inner wall surface of the tubular member and the mandrel, and then heated to sinter the metal powder to form a sintered wick. Removing sintered wick forming step; And a sealing and vacuum step of injecting a working fluid into the inner space of the tubular member and sealing and vacuuming the inner space of the tubular member.

On the other hand, the hole of the base block is a hole penetrating from one side of the base block to the other side, the insertion portion of the tubular member is preferably located in the middle portion of the tubular member.

On the other hand, the tubular member is a cylindrical pipe member, the close coupling step, it is preferable to include a step of passing through the metal ball (ball) to the insertion portion to expand the insertion portion.

In addition, the close coupling step, it is preferable to include a step of condensing the diameter of the hole by applying pressure in at least two directions from the outside of the base block.

According to the heat pipe provided with the base block of the present invention and the cooling device having the same, the heat pipe can be provided with a base block which can be fixed by directly contacting the heat generating parts, thereby providing excellent heat transfer efficiency. .

In addition, according to the manufacturing method of the heat pipe provided with a base block, the heat pipe provided with the base block integrally can be produced by a simple process.

Hereinafter, with reference to the accompanying drawings, preferred embodiments will be described in detail.

1 to 4, a heat pipe 1 with a base block of an embodiment according to the invention is shown. 1 is a schematic perspective view of a heat pipe 1 having a base block, FIG. 2 is a schematic longitudinal cross-sectional view of the base block 10 of FIG. 1, and FIG. 3 is a tubular member 30 of FIG. 1. Is a cross-sectional view of. 4 is a longitudinal sectional view showing the cross section of the tubular member 30 and the hole 20 of the base block 10 at one time. FIG. 5 is a plan view illustrating a state before deformation of the branch portions 16, 17, and 18 of the base block 10 of the heat pipe 1 having the base block of FIG. 1.

The heat pipe 1 having the base block is a heat pipe used as a component in a cooling device for cooling a heat generating part (not shown) that generates heat during operation as an electric and electronic part.

The heat pipe 1 having the base block includes a base block 10, at least one hole 20, and a tubular member 30.

The base block 10 is mounted to be in contact with the heat generating part. The heating component may be a central processing unit (cpu) mounted on a main board of a computer, or may be a chipset mounted on a graphics card.

Usually, the lower side of the base block 10 is mounted and fixed to the upper surface of the heating element. The mounting method may be a conventional fixing clip or the like. On the other hand, in the case of a computer, when the central processing unit is mounted on the upper surface of the main board, one side of the base block 10 may be mounted to directly contact the rear surface of the main board.

In the case of the present embodiment, the base block 10 is formed with two cutting grooves 15 cut in the longitudinal direction at both ends thereof. The cutting groove 15 is formed in a portion between the plurality of holes 20.

The branches 16, 17, 18 separated by the incision groove 15 are bent to the side 19 of the outer end thereof upward. The configuration in which the side faces upward is configured to allow the tubular member 30 to stand in the vertical direction for smooth operation of the grooved groove formed on the inner surface. A hole 20 is formed in the side surface 19, and one end of the tubular member 30 is coupled to the hole 20.

5 shows a state before the branch portions 16, 17 and 18 of the base block are deformed. This type of base block is to be modified to have the shape shown in FIG. The reason why the base block is provided with the branch portions 16, 17, 18 is to allow the tubular members to be spaced apart from each other, as shown in Figure 1, when the heat radiating portion is coupled to the tubular member, the tubular member is intensively coupled to the heat radiating portion. This is because it is better in terms of the efficiency of heat transfer that they are spaced apart from each other than they are.

Meanwhile, the present invention is not limited to the above-described embodiment, and in the case of another embodiment, the baseblock may be modified in various forms. That is, irrespective of whether the incision groove and the branch portion are formed, both ends may not be bent upward, and only one or both ends may be flat. In addition, the base block may not have a cutting groove and the branch portion, the entire shape may be a flat cylinder, it may be a variety of shapes, such as a flat hexagonal column. In the absence of a branch, both ends or one of the ends may be bent upwardly as a whole.

The lower side of the base block 10 is flat because it is in direct contact with the heat generating parts. The other side, except the lower side, is not necessarily flat.

At least one hole 20 is formed in the base block 10. The number of holes 10 may be two or more as necessary. The hole 20 has a constant cross section thereof.

In the present embodiment, the cross section of the hole 20 is circular so as to correspond to the shape of the tubular member 20. However, the shape of the cross section of the hole may be variously modified into a polygon, such as an ellipse, a rectangle, a pentagon, a hexagon, etc., rather than a circle, depending on the embodiment. When the cross-sectional shape of the hole 20 is deformed, the shape of the tubular member 30 is also correspondingly deformed.

In this embodiment, the hole 20 is formed to penetrate the base block 10 in the transverse direction. Referring to FIG. 5, which illustrates a state before deformation into the shape of the base block 10 illustrated in FIG. 1, four holes 20 are formed in the left end of the base block so as to penetrate the right end. One end of the tubular member 30 is coupled to each hole 20.

Meanwhile, in another embodiment, the hole may not be formed through the base block, but may be formed only on one side. In this case, the extension length (depth) of the hole is determined in consideration of the size of the heating element on which the base block 10 is to be mounted. That is, the hole is extended to a length that can cover most of the heat generating parts.

2 and 4, the inner surface of the hole 20 is provided with a sintered wick 22 formed by sintering metal powder. The sintered wick 22 serves as a passage for moving the working fluid by capillary force.

The tubular member 30 has a circular internal cross-sectional shape that is the same as the cross section of the hole 20. Therefore, in this embodiment, since the cross section of the hole 10 is circular, the inner cross section of the tubular member 30 is also a circular pipe having a size corresponding to the same shape. The tubular member is selected according to the cross-sectional shape of the hole. The material of the tubular member 30 is a metal having a relatively good thermal conductivity, such as copper and aluminum. The inner space of the tubular member 30 is continuously connected with the inner space of the hole 20, and when these inner spaces are combined, they have the same shape as the inner space of one circular pipe.

On the inner side of the tubular member 30, in the present embodiment, a groove wick 32 formed of a plurality of grooves formed in the longitudinal direction is formed. The grooves quickly move the working fluid inside by capillary pressure. The heights of the grooves or the distances between the grooves are appropriately selected in consideration of the size of the tubular member 30 and the nature or quantity of the working fluid.

In the present embodiment, the tubular member 30 is provided with all eight so as to be coupled to each of the two side inlets of the hole one by one. One end of each tubular member 30 is coupled to the inlet of the hole 20 and the other end thereof is sealed. Since the tubular member 30 is made of metal, the other side may be post-processed in various shapes.

The tubular member 30 is provided with a grooved wick 32 on its inner side, and is fixed in the vertical direction for effective movement of the working fluid. On the other hand, in another embodiment, the tubular member may be fixed to the hole 20 of the base block 10 so that the angle formed with the ground has an arbitrary value of 0 ° or more and less than 90 °.

In addition, the working fluid is included in the inner space of the tubular member 30 and the inner space of the hole 20. The working fluid uses the same material as that used in the conventional heat pipe, repeats the liquid phase and the gas phase, circulates inside the base block and the inside of the tubular member, and transfers heat from the high temperature portion to the low temperature portion.

On the other hand, in the above-described embodiment, the wick provided on the inner surface of the hole is an example of the sintered wick, but is not limited thereto. The wick may be a meshwick or a groovewick. The mesh member constituting the mash wick is a dense mesh-shaped member woven from wire rods of very small diameters. The mashwick is configured to be in close contact with the inner side of the hole by a known method.

On the other hand, in the above-described embodiment, the groove on the inner side of the tubular member is an example provided with, but the present invention is not limited thereto. That is, no wick may be formed on the inner side of the tubular member. Even in this case, the working fluid vaporized with gas is phase-changed into liquid, and then falls down due to gravity, thereby enabling operation.

Heat pipe 1 having a base block according to an embodiment of the present invention having the configuration as described above has the following effects.

The heat pipe 1 having the base block includes a hole 20 in the base block 10 and a tubular member 30 having the same cross section as the hole 20 is coupled, and the hole 20 is provided. The inner surface of the tubular member 30 is provided with a sintered wick 22, and the inner surface of the tubular member 30 is provided with a grooved wick 32 which can be operated in connection with the sintered wick 22, the base block 10 ) Is part of the heatpipe.

Therefore, when the base block is mounted in direct contact with the heat generating part, the heat generated from the heat generating part can be directly transmitted without any medium, which has the advantage of improving heat transfer efficiency. In other words, the heat transferred directly from the heating element to the base block can be directly transferred to the sintered wick formed in the inner surface of the hole inside the base block.

In addition, since the sintered wick is formed on the inner surface of the hole of the base block by the same process as the conventional heat pipe process, the tubular member can be welded to produce the product, which is simple in manufacturing and stable in production.

In addition, since deformation of the shape and number of the holes and the tubular member is easy, there is an advantage that it is possible to implement a variety of shapes required by various cooling apparatus. In addition, since the lower side of the base block is processed flat and the hole is easily processed, there is an advantage in that manufacturing is easy.

Conventionally, a heat pipe has to have a base block of a separate configuration in order to receive heat of a heat generating part, and one end of the heat pipe has to be joined to the base block by soldering or the like. Therefore, contact thermal resistance is generated between the base block and the heat pipe, which inevitably leads to a decrease in heat transfer efficiency. In addition, due to the soldering process of the heat pipe to the base block there was a disadvantage that additional manufacturing cost and time is required. The present invention solves all these shortcomings of the conventional heat pipe by providing the base block integrally.

Meanwhile, in the above-described embodiment, the cross section of the tubular member is circular, and the hole is pierced through the base block, but another modified embodiment is possible.

6 to 7 show a heat pipe 1a with a base block of another embodiment according to the invention. 6 is a perspective view of the present embodiment, Figure 7 is a schematic cross-sectional view of the base block, Figure 7 is a plan view showing a state before the base block of Figure 6 is deformed.

In the present embodiment, the heat pipe 1a having the base block comprises a base block 10a, a hole 20a and a tubular member 30a. The hole 20a formed in the base block 10a has a long cross section. Long hole means a shape in which one axis is longer than the other axis, such as an ellipse, an egg shape, or a track shape. The sintered wick 22a is formed in the inner surface of the hole 20a.

The base block 10a does not have branch portions as compared with the previous embodiment. Referring to FIG. 6, the base block 10a is bent upward from both end portions of the plate-shaped member as a whole, and the side ends of the side block portions face upward.

A plate member 11a having a plurality of through holes 12a communicating with the hole 20a is coupled to the hole 20a of the base block 10a. The plate member 11a is provided in the both inlet of the hole 20a, respectively. The plate member 11a serves to connect the tubular member 30a having a cross-sectional shape different from that of the hole 20a.

One end of the tubular member 30a is coupled to each through hole 12a of the plate member 11a. The tubular member 30a is provided with eight pieces, such as the number of through holes 12a. The tubular member 30a has the same configuration as the tubular member 30 of the previous embodiment. On the other hand, the through-hole (12a) to the plate member (11a) so that the working fluid is brought down along the grooved groove formed on the inner surface of the tubular member (30a) is well transmitted to the sintered wick (22a) formed on the inner surface of the hole (20a) Is formed. The operation and effects of this second embodiment are similar to those of the first embodiment. However, because the specific configuration is slightly different, the effect will be appropriately modified accordingly.

9 to 11 show a heat pipe 1b having a base block according to another embodiment of the present invention. FIG. 9 is a perspective view of the present embodiment, FIG. 10 is a side view of a shape in which the tubular member 30b of the heat pipe 1b having the base block of FIG. 9 is deformed, and FIG. 11 is a cross-sectional detail of the lower left side of FIG. It is also.

The heat pipe 1b having the base block includes a base block 10b, at least one hole 20b, and at least one tubular member 30b.

The base block 10b has a shape suitable for being mounted to be in contact with the heat generating part. Its bottom is a flat hexahedron shape. According to the embodiment, the shape of the base block may be variously modified.

The hole 20b is formed in the base block 10b. The cross section of the hole 20b is constantly extended. One or more holes 20b may be formed as necessary. In this embodiment, the hole 20b is formed so as to penetrate from one side of the base block 10b to the other side.

At least a part of the tubular member 30b is inserted into the hole 20b. The part inserted into the hole and positioned in the base block 10b is called an insertion part. The tubular member is provided in a number corresponding to the number of holes. In this embodiment, since four holes are provided, four tubular members 30b are also provided.

The inner surface of the tubular member 30b is provided with a sintered wick 32b formed by sintering metal powder in its entirety. That is, the sintered wick is not formed in the inner surface of the hole 20b, but the sintered wick is formed over the whole tubular member 30b. The working fluid is contained in the tubular member 30b.

In the present embodiment, the insertion portion of the tubular member 30b is provided in the middle portion thereof. Both end portions of the insertion portion provided in the middle portion is formed to extend to the outside of the base block (10b).

The outer surface of the insertion portion of the tubular member 30b inserted into the hole 20b is in close contact with the inner surface of the hole 20b. That is, the two are tightly coupled so that heat transfer can be transferred quickly and without loss from the base block 10b to the tubular member 30b inserted into the hole 20b.

In the present embodiment, since both the base block 10b and the tubular member 30b are made of a metal material, for example, copper or aluminum, the inner surface of the hole 20b and the outer surface of the insertion portion are tightly coupled by metal bonding. have. The outer surface of the insertion portion of the tubular member 30b and the inner surface of the hole 20b are in close contact with each other by forming a metal coupling by inserting the insertion portion into the hole 20b and expanding or inserting the hole into the hole 20b. Are combined.

Either the expansion of the insertion part or the shaft of the hole may be applied, or both may be applied as necessary. Through the process of expansion or shaft pipe, the base block 10b and the tubular member 30b are metallicly coupled so that both are almost integrated.

On the other hand, the sintered wick 32b of the tubular member 30b is formed inside the tubular member after the tubular member and the base block are tightly coupled to each other through an expansion or shaft pipe process, and then formed into a desired shape, for example, as shown in FIG. Molded into a shape as shown in FIG. 10.

On the other hand, in the present embodiment, the hole is penetrated through the base block, and the insertion portion of the tubular member is exemplified, but the present invention is not limited thereto. In other words, the hole may be formed so as not to penetrate the base block, in which case the tubular member is inserted into and coupled to only one side end thereof.

The operation and effect of this embodiment are similar to the embodiments of the invention described above. That is, the heat transferred to the base block 10b is quickly transferred to the tubular member 30b, and then vaporizes the working fluid contained in the sintered wick 32b provided in the tubular member 30b. When the heat dissipation part is coupled to the tubular member 30b, the working fluid circulates to cool the heat generating part coupled to the base block.

12 shows a cooling device 2 employing a heat pipe 1 with a base block as described above.

The cooling device 2 includes a heat pipe 1 and a heat dissipation part 40. The heat dissipation unit 40 is composed of a plurality of heat dissipation fins. The heat dissipation fin is formed with a plurality of through holes for coupling the tubular member to the thin metal plate. Burrs are formed on the outer periphery of each through hole to serve to space each radiating fin at a predetermined distance. On the other hand, although not shown, the cooling fan is provided at an appropriate position to improve the cooling performance.

The heat pipe 1 employed in the present cooling device 2 is the embodiment shown in FIG. The heat pipe 1 shown in FIG. 1 is provided with four tubular members 30 on each side of the base block 10. On the other hand, although the base block 10 disclosed in FIG. 5 was straight, it was molded so that the branch portions 16, 17, and 18 were “U” shaped by post-processing while being employed in the cooling device 2.

On the other side of the tubular member 30, a plurality of heat dissipation fins 40 are coupled. Each heat radiation fin is made of a thin metal plate and has six through holes. Burrs are formed on the outer periphery of each through hole. The tubular member 30a is fitted into the through-hole in which the bur is formed, and is fixed by soldering or the like.

The specific shape of the heat dissipation fin can be variously modified as necessary. In addition, the other side of the tubular member is also variously deformable by post-processing in consideration of the configuration coupled to the heat radiation fins. On the other hand, the heat pipe 1 employed in the present cooling device 2 is the same as described above for the heat pipe 1 having the base block. Therefore, do not overlap.

The cooling apparatus 2 of this structure is fixed so that the lower side surface of the base block 10 may directly contact a heat generating component (not shown). As a method of fixing the base block 10 to the heat generating part, a conventional clip or the like is used.

The heat generated from the heat generating parts is directly transmitted to the base block 10, and then transferred to the heat dissipation unit 40 through the tubular members 30 provided on both sides, and is radiated into the air and cooled.

In the cooling apparatus 2 of the present invention, unlike the conventional cooling apparatus, heat resistance is generated at the coupling portion between the heating block and the heat pipe, so that the heat transfer efficiency is not good, and the base block 10 has a separate member from the heat pipe. On the other hand, since the heat pipe is provided as a part of the configuration, there is no heat resistance, and the heat transfer efficiency is much improved.

In addition, in the case of the conventional cooling apparatus, a process of coupling the heat pipe and the heat transfer block to each other is necessary and the structure is inevitably complicated, but according to the present invention, such a process is not necessary, and manufacturing cost is reduced, The simple structure has the advantage of improving the durability of the product.

In Fig. 13 there is shown a cooling device 3 employing a heat pipe 1b with a base block described third above.

The cooling device 3 includes a heat pipe 1b and a heat dissipation part 40b. The heat dissipation unit 40b is formed of a plurality of heat dissipation fins similarly to the cooling device 2 described above. Therefore, what has been described above with respect to the cooling device 2 also applies to the cooling device 3 of the present embodiment.

The heat pipe 1b employed in the present cooling device 3 is the embodiment shown in FIG. The heat pipe 1b shown in FIG. 9 is provided with four hole tubular members 30 which penetrate the base block 10b. On the other hand, although the tubular member 30b disclosed in FIG. 9 was straight, the tubular member 30b positioned at both sides of the insertion portion by post-processing while being employed in the cooling device 3 was formed to have an overall "U" shape.

The other side of the tubular member (30b) is a plurality of heat radiation fins are coupled. Each heat radiation fin is made of a thin metal plate and has eight through holes. Burrs are formed on the outer periphery of each through hole.

The specific shape of the heat dissipation fin can be variously modified as necessary. In addition, both sides of the tubular member may also be deformed into various shapes by post-processing in consideration of the configuration coupled to the heat radiation fins.

The effects described with respect to the cooling device 3 having such a configuration apply to those described in the embodiments of the present invention. Therefore, duplicate description is omitted. However, since the sintering wick 32b is formed entirely inside the tubular member 30b, the cooling device 3 of the present embodiment does not need to be configured to face both sides of the base block upward.

14 and 5, a method of manufacturing a heat pipe with a base block, which is another aspect of the present invention, will be described.

The heat pipe manufacturing method having a base block according to an embodiment of the present invention includes a hole forming step, a sintering wick forming step, a tubular member coupling step, and a sealing and vacuum step. On the other hand, in the present embodiment, the manufacturing method is suitable for manufacturing the heat pipe 1 shown in FIG.

The hole forming step is a step of forming at least one hole in the side of the base block of the metal material. Referring to FIG. 14 with the mandrel 102 removed, the base block 10 is in the shape of a cube. The hole 20 is formed by a drilling operation so as to penetrate the base block laterally. The hole is circular in cross section. On the other hand, in another embodiment, the base block having a hole may be formed by a method such as injection, or the cross section of the hole may be modified into an ellipse or a polygon.

On the other hand, in the present embodiment, before or after the hole forming step, the step of forming a cut groove 15 in the base block. Branch portions 16, 17, and 18 are formed by the formation of the cutout 15. In addition, the forming step of the cutting groove 16 may be performed after the tubular member is coupled to the base block 10.

The sintering wick forming step is a step of forming a sintering wick on the inner wall of the hole 20.

In order to form the sintered wick over the entire inner wall surface of the hole 20, a mandrel 102 is first inserted into the hole 20 of the tubular member 30 (see FIG. 14). The mandrel 102 has a shape corresponding to the internal space of the hole. In the present embodiment, the mandrel is in the form of a cylinder having a volume slightly smaller than that of the cylinder, which is the shape of the inner space of the hole.

The mandrel is maintained to be spaced apart from the inner surface of the hole of the tubular member by a constant distance. The metal powder is filled in the space secured between the mandrel and the inner surface of the hole of the tubular member (see Fig. 15). When the metal powder is filled and then heated, the metal powder is sintered to form a sintered wick. After the sinter wick is formed, the mandrel is removed. In the case of this embodiment, the sintered wick is formed integrally with the inner wall of the hole continuously.

After the sintered wick is formed, the next step, the tubular member coupling step is performed.

The tubular member coupling step may have an internal cross-sectional shape that is the same as the cross section of the hole at both side inlets of the hole of the base block, and one side of the tubular member having a groove wick 32 formed of a plurality of grooves formed in a longitudinal direction on an inner side thereof. Engaging the end to the inlet of the hole.

 In the present embodiment, since the holes are formed to penetrate the base block 10, eight tubular members 30 are coupled to each of the inlets on both sides of the hole. The method of joining the tubular member 30 to the inlet of the hole is by soldering or the like. Since the inner end face of the tubular member 30 is substantially the same as the inner end face of the hole 20, the inner space of the tubular member and the inner space of the hole extend to maintain a constant cross section over the entire length.

Next, the sealing and vacuum steps are performed.

The sealing and vacuum step is to inject the working fluid into the entire inner space consisting of the inner surface of the tubular member 30 and the inner surface of the hole 20, and to seal and vacuum the entire inner space. The process of injecting, sealing and vacuuming a working fluid uses the method used in the manufacture of a conventional heat pipe. Therefore, detailed description thereof will be omitted.

The heat pipe 1 shown in FIG. 5 is a heat pipe having a completed base block injected with a working fluid and vacuumed, produced by the manufacturing method of an embodiment of the present invention. This type of heat pipe 1 is shaped to bend the branches of the base block as shown in FIG. 1. Then, when the heat dissipation unit 40 is coupled to the tubular member 30, the cooling device 2 as shown in Figure 12 is configured.

On the other hand, a heat pit 1a having a base block employed in the cooling device 3 illustrated in FIG. 13 can also be produced using the above-described manufacturing method. However, a process of coupling the plate member 11a having a plurality of through holes to both end portions of the base block 10a is added, and the tubular member 30a is coupled to the through hole 12a formed in the plate member 11a. It's a little different. Forming the sintered wick in the hole 20a may also be performed by changing the mandrel to have a cross section corresponding to the cross section of the hole in accordance with the change in the shape of the hole.

The heat pipe provided with the base block produced by the above-described manufacturing method may be employed in various types of cooling devices for cooling the heat generating parts mounted in the electronic equipment such as computers. As described above, the tubular member can be deformed into various shapes required by a post process. .

According to the heat pipe manufacturing method provided with the base block described above, there is an advantage that the base block can be produced in a form provided integrally with the heat pipe. Advantages obtained by having a base block are as described above with regard to the heat pipe having the base block.

According to the manufacturing method of the present invention, it is formed by using a conventional method of forming a conventional sintered wick in the hole of the tubular member, and then simply joining the tubular member having a groovewick formed therein to the inlet of the hole formed in the base block. In addition, the process of injecting the working fluid into the internal space, the vacuum and the sealing process afterwards also has the advantage that it is possible to apply a stable process for manufacturing a conventional heat pipe as it is, making the manufacturing simple and inexpensive.

In addition, there is an advantage that it is possible to implement a variety of shapes of the base block, hole, tubular member.

On the other hand, a heat pipe manufacturing method having a base block according to another embodiment of the present invention will be described. Embodiments of the present invention are suitable for manufacturing the heat pipe 1b having the base block shown in FIG.

The manufacturing method of this embodiment includes a hole forming step, a tubular member inserting step, a close bonding step, a sintered wick forming step and a sealing and vacuum step. The hole forming step is the same as the hole forming step described above. However, the diameter of the hole is formed to be slightly larger than the outer diameter of the tubular member to be defected.

The tubular member insertion step is to insert the tubular member into the hole. In this embodiment, since the hole is a hole penetrating the tubular member, the tubular member is inserted into the hole and then inserted so that both ends thereof are exposed. In the tubular member, the portion into the hole of the base block is the insertion portion.

The close coupling step is a step of closely coupling the outer surface of the insertion portion of the tubular member and the inner surface of the hole. In the case of this embodiment, the tight coupling step includes the expansion of the insertion portion. The tubular member is a cylindrical pipe member and is metal. After inserting a metal ball having a diameter slightly larger than the inner diameter of the tubular member to one side of the tubular member, the metal ball is moved to the other side by using a high pressure or the like.

The inner diameter of the tubular member is expanded in the process of moving the metal ball, while being expanded, the coupling with the inner surface of the hole of the base block. At this time, the outer surface of the tubular member and the inner surface of the hole of the base block, the coupling is made corresponding to the mutual metallic coupling by the high pressure applied to both.

On the other hand, in another embodiment, instead of inserting and moving the metal ball, the expansion pipe may inject a gas of high pressure to expand the inner diameter of the tubular member.

On the other hand, in another embodiment, the close coupling step may include a step of condensing the diameter of the hole of the base block by applying pressure in at least two directions from the outside of the base block corresponding to the insertion portion. That is, in the state where the insertion portion of the tubular member is inserted into the hole of the base block, the base block is pressed in at least two directions or more, preferably in four directions, to reduce the diameter of the hole. In this process, the insertion portion of the tubular member and the base block are tightly coupled to each other.

The sintered wick forming step is to form a sintered wick as a whole on the inner surface of the tubular member. The sintered wick is formed by inserting a mandrel into the tubular member, filling the space between the inner wall of the tubular member and the mandrel, and heating the metal powder to form a sintered wick. Remove it and you're done.

The sealing and vacuum step is to inject a working fluid into the inner space of the tubular member, and to seal and vacuum the inner space of the tubular member. A heat pipe 1b with a base block manufactured in this way is shown in FIG. The cooling device 3 which deform | transforms the heat pipe 1b of this form and comprised the heat dissipation part 40b is shown by FIG. Actions and effects of the manufacturing method of the present embodiment is applied as described above modified appropriately.

1 is a schematic perspective view of a heat pipe 1 with a base block of one embodiment according to the invention,

2 is a schematic longitudinal cross-sectional view of the base block 10 of FIG. 1 in a vertical direction;

3 is a cross-sectional view of the tubular member 30 of FIG.

4 is a longitudinal cross-sectional view showing a cross section of the tubular member 30 and the hole 20 of the base block 10 at one time;

5 is a plan view showing a state before deforming the branches 16, 17, 18 of the base block 10 of FIG.

6 is a perspective view of a heat pipe 1a d with a base block of another embodiment according to the present invention;

7 is a schematic cross-sectional view of the base block 10a,

8 is a plan view illustrating a state before the base block of FIG. 6 is deformed;

9 is a perspective view of a heat pipe 1a having a base block according to another embodiment of the present invention;

10 is a side view of a shape in which a tubular member of a heat pipe having a base block of FIG. 9 is deformed;

11 is a cross-sectional detail view of the lower left of FIG. 10;

12 is a perspective view of a cooling apparatus according to another embodiment of the present invention;

13 is a perspective view of a cooling apparatus according to another embodiment of the present invention;

14 and 15 are views for explaining a method for manufacturing a heat pipe having a base block.

<Explanation of symbols for the main parts of the drawings>

1, 1a, 1b ... heat pipe with base block

10, 10a, 10b ... Baseblock 20, 20a, 20b ... Holes

30, 30a, 30b ... tubular members 22, 22a, 32b ... wick

2, 3 ... Cooler 40, 40b ... Heat dissipation

102 ... Mandrel

Claims (21)

A base block mounted to be in contact with the heating component; At least one hole formed in the base block and having a constant cross section; And One end is coupled to the inlet of the hole and the other end comprises a sealed tubular member, Heat pipe having a base block, characterized in that the wick (wick) is provided on the inner surface of the hole of the base block. The method of claim 1, The wick formed on the inner surface of the hole of the base block is any one of a sintered wick formed by sintering metal powder, a groove wick made of a plurality of grooves formed in a longitudinal direction, and a mesh wick formed of a mesh member. Heat pipe having a base block. The method of claim 1, The inner side of the tubular member is a heat pipe having a base block, characterized in that a groove wick (groove wick) consisting of a plurality of grooves formed in the longitudinal direction is formed. The method of claim 1, A plurality of holes of the base block is provided, The base block is formed with a cutting groove that is longitudinally cut at both ends of the portion between the plurality of holes, the branch portion separated by the cutting groove is bent to the side of the outer end facing upwards, The hole is a heat pipe having a base block, characterized in that formed on the side of the outer end of the branch portion. The method of claim 1, The hole of the base block is in the shape of a long hole, A plate member having a plurality of through holes communicating with the hole is coupled to the hole of the base block, Each through hole of the plate member is a heat pipe having a base block, characterized in that one side end of the tubular member is coupled. A base block mounted to be in contact with the heating component; At least one hole formed in the base block and having a constant cross section; And At least one tubular member, at least a portion of which is inserted into the inside of the hole; The inner surface of the tubular member is provided with a sintered wick formed by sintering metal powder, An outer surface of the insertion portion of the tubular member inserted into the hole is in close contact with the inner surface of the hole heat pipe provided with a base block. The method of claim 6, The outer side surface of the insertion portion of the tubular member and the inner side surface of the hole, the insertion portion is inserted into the hole after the insertion portion is enlarged or the hole is piped, the base block characterized in that the close contact with each other Heat pipe provided with. The method of claim 6, The hole is formed to penetrate from one side of the base block to the other side, The tubular member is the heat pipe with a base block, characterized in that the insertion portion is provided in the middle portion. A cooling device comprising a heat pipe and a heat radiating unit, The heat pipe, A base block mounted to be in contact with the heating component; At least one hole formed in the base block, the cross section of which is constantly extended, the inner surface having a wick; And One end thereof is coupled to the inlet of the hole, and the other end thereof is a heat pipe having a base block including a sealed tubular member. The heat dissipation unit is a cooling device, characterized in that the heat dissipation unit coupled to the tubular member. 10. The method of claim 9, The wick formed on the inner surface of the hole of the base block is any one of a sintered wick formed by sintering metal powder, a groove wick made of a plurality of grooves formed in a longitudinal direction, and a mesh wick formed of a mesh member. Chiller made. 10. The method of claim 9, Cooling apparatus, characterized in that the groove surface (groove wick) consisting of a plurality of grooves formed in the longitudinal direction on the inner surface of the tubular member. 10. The method of claim 9, A plurality of holes of the base block is provided, The base block is formed with a cutting groove cut in the longitudinal direction at both ends of the portion between the plurality of holes, the branch portion separated by the cutting groove is bent to the side of the outer end facing upwards, The hole is formed in the side of the outer end of the branch portion, The heat dissipation unit is a cooling device, characterized in that a plurality of heat dissipation fins coupled to the tubular member spaced apart from each other. 10. The method of claim 9, The hole of the base block is a long hole shape, The plate member having a plurality of through holes is coupled to the holes of the base block, Cooling apparatus, characterized in that the one end of the tubular member is coupled to each through hole of the plate member. A cooling device comprising a heat pipe and a heat radiating unit, The heat pipe, A base block mounted to be in contact with the heating component; At least one hole formed in the base block and having a constant cross section; And At least one tubular member having an sintered wick formed by inserting at least a portion of the insertion portion into the inner side of the hole and making an outer side thereof closely contact the inner side of the hole, and the entire inner side thereof formed by sintering metal powder; Heat pipe having a base block consisting of, The heat dissipation unit is a cooling device, characterized in that the heat dissipation unit coupled to the tubular member. The method of claim 14, The outer side surface of the insertion portion of the tubular member and the inner side surface of the hole, the insertion portion is inserted into the hole after the insertion portion is enlarged or the hole is piped, the base block characterized in that the close contact with each other Heat pipe provided with. The method of claim 14, The hole is formed to penetrate the base block from one side to the other side, The tubular member, the insertion portion is provided in the middle portion, both end portions of the insertion portion is bent upwards, is formed to form an overall "U" shape, The heat dissipation unit is a cooling device, characterized in that a plurality of heat dissipation fins coupled to the tubular member spaced apart from each other. A hole forming step of forming at least one hole in a side surface of the metal base block; Inserting a mandrel in the hole, filling the metal powder in the space between the inner wall surface of the hole and the mandrel, and then heating to sinter the metal powder to form a sintered wick to remove the mandrel Sintering wick forming step; A tubular member coupling step of joining a tubular member having a groove wick formed of a plurality of grooves formed in a longitudinal direction on an inner side thereof with an inner cross-sectional shape identical to that of the hole; And And a sealing and vacuum step of injecting a working fluid into the entire inner space including the inner surface of the tubular member and the inner surface of the hole, and sealing and vacuuming the entire inner space. One heat pipe manufacturing method. A hole forming step of forming at least one hole in a side surface of the metal base block; A tubular member insertion step of inserting a tubular member into the hole; A close coupling step of closely inserting an insertion portion inserted into the hole of the tubular member into an outer surface of the insertion portion and an inner surface of the hole; A mandrel is inserted into the tubular member, a metal powder is filled in the space between the inner wall surface of the tubular member and the mandrel, and then heated to sinter the metal powder to form a sintered wick. Removing sintered wick forming step; And And a sealing and vacuum step of injecting a working fluid into the inner space of the tubular member and sealing and vacuuming the inner space of the tubular member. The method of claim 18, The hole of the base block is a hole penetrating from one side of the base block to the other side, Insertion portion of the tubular member is a heat pipe manufacturing method having a base block, characterized in that located in the middle of the tubular member. The method of claim 18, The tubular member is a cylindrical pipe member, The close coupling step, the heat pipe manufacturing method having a base block comprising the step of passing through the metal ball (ball) to the insertion portion to expand the insertion portion. The method of claim 18, The close coupling step may include applying a pressure in at least two directions from the outside of the base block to conduit a diameter of the hole.

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