JP2018123987A - Vapor chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vapor chamber capable of reducing flow resistance of gas-phase working fluid and liquid-phase working fluid, preventing scattering of the liquid-phase working fluid caused by the gas-phase working fluid and smoothing reflux of the liquid-phase working fluid, thereby exhibiting an excellent heat transport characteristic.SOLUTION: A vapor chamber includes: a container formed with a hollow cavity part; a pipe body connected to the container, and communicating between the cavity part and an internal space; and working fluid sealed in a space from the cavity part to the inside of the pipe body. At a connection part between the container and the pipe body, provided is a partition wall integrated with the container. The partition wall has one surface and the other surface, wherein on the one surface, a wick structure with capillary force is formed, and the capillary force on the one surface is made larger than capillary force on the other surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vapor chamber that exhibits excellent heat transport characteristics by reducing the flow resistance of a liquid-phase working fluid and a gas-phase working fluid.

  Electronic parts such as semiconductor elements mounted on electric / electronic devices have increased in calorific value due to high-density mounting accompanying higher functionality, and in recent years, cooling has become more important. A vapor chamber may be used as a method for cooling a heating element such as an electronic component.

  In order to efficiently cool the heating element, it is required to improve the heat radiation efficiency of the vapor chamber. Therefore, a first chamber that is a planar container, a plurality of second chambers that are thermally conductive cylinders communicating with the interior of the first chamber, the first chamber, and the interior of the second chamber A vapor chamber including a working fluid that can circulate is proposed (Patent Document 1).

  In Patent Document 1, the working fluid undergoes a phase change from the gas phase to the liquid phase while the gas working fluid flows in the direction from the base portion to the tip portion of the second chamber. Heat from the connected heating element is released from the second chamber to the outside of the vapor chamber. The working fluid phase-changed from the gas phase to the liquid phase in the second chamber is returned to the first chamber from the front end to the base by the wick structure formed on the inner surface of the second chamber. Returned to the chamber.

  However, in Patent Document 1, since the separation of the gas-phase working fluid flow path and the liquid-phase working fluid flow path in the second chamber is insufficient, resistance is generated in the flow of the working fluid. In addition, there is a problem that the heat transport efficiency is not sufficient because the liquid-phase working fluid may be scattered by the momentum of the flow of the gas-phase working fluid.

US Patent Application Publication No. 2016/0227672

  In view of the above circumstances, the present invention reduces the flow resistance of the gas-phase working fluid and the liquid-phase working fluid, and prevents the liquid-phase working fluid from being scattered by the gas-phase working fluid. An object of the present invention is to provide a vapor chamber that exhibits excellent heat transport characteristics by facilitating the reflux of the working fluid.

  Aspects of the present invention include a container in which a hollow cavity is formed, a tube connected to the container and communicating with the cavity and an internal space, and enclosed in a space from the cavity to the inside of the tube A partition wall that is integral with the container is provided at a connection portion between the container and the tubular body, the partition wall having one surface and the other surface, A wick structure that generates capillary force is formed on the surface of the vapor chamber, and the capillary force of the one surface is larger than the capillary force of the other surface.

  Aspects of the present invention include a container in which a hollow cavity is formed, a tube connected to the container and communicating with the cavity and an internal space, and enclosed in a space from the cavity to the inside of the tube A partition wall integrated with the tube body is provided at a connection portion between the container and the tube body, and the partition wall has one surface and the other surface, A wick structure that generates a capillary force is formed on the one surface, and the capillary force on the one surface is larger than the capillary force on the other surface.

  In each said aspect, the heat generating body which is a to-be-cooled body is thermally connected to the container outer surface, and the tubular body is attached to the container. Since the cavity that is the internal space of the container communicates with the internal space of the tube, the working fluid is sealed in the space formed from the cavity to the inside of the tube. Moreover, the internal space of the tubular body is in a state where the pressure is reduced by the deaeration process, similarly to the hollow portion.

  Moreover, in each said aspect, the partition part integral with respect to a container and the partition body integral with respect to a pipe body are each provided in the connection part of a container and a pipe body among the internal space of a vapor chamber. . Here, “integral” means fixed in a state where it cannot be attached and detached.

  An aspect of the present invention is a vapor chamber in which the container is formed by one plate-like body and the other plate-like body facing the one plate-like body.

  An aspect of the present invention is a vapor chamber in which a wick structure is not formed on the other surface of the partition wall.

  An aspect of the present invention is a vapor chamber in which a capillary force on the one surface of the partition wall is equal to or greater than a capillary force on the inner surface of the tubular body.

  An aspect of the present invention is a vapor chamber in which a shape on the one surface side of the partition wall corresponds to an inner surface side shape of a portion of the tubular body facing the one surface.

  An aspect of the present invention is a vapor chamber in which the wick structure on the one surface of the partition wall is in contact with the bottom of the container inner surface.

  An aspect of the present invention is the vapor chamber in which the wick structure on the one surface of the partition wall is in contact with the inner surface of the tube body on the side far from the heat source.

  An aspect of the present invention is a vapor chamber in which the partition is not provided at the distal end of the tubular body.

  The aspect of this invention is a vapor chamber in which the said partition is not provided in the front-end | tip part and center part of the said tubular body.

  In the said aspect, the partition is provided only in the site | part to which the tubular body is attached to the container, ie, the base of a tubular body.

  According to the aspect of the present invention, a partition having one surface and the other surface, which is a member integrated with the container or the pipe body, is provided in a connection portion between the container and the pipe body in the internal space of the vapor chamber. A pipe facing one surface of the partition wall and one surface of the partition wall in the internal space of the connecting portion between the container and the tube body because the capillary force of the one surface is larger than the capillary force of the other surface. A liquid-phase working fluid flow path is formed between the inner surface and the body inner surface. Further, the other part, that is, the part between the other side of the partition and the part of the inner surface of the tubular body that does not face the one side of the partition serves as a flow path for the gas-phase working fluid. Therefore, in the internal space of the connection portion between the container and the tube, the liquid-phase working fluid flow path and the gas-phase working fluid flow path are reliably separated. Accordingly, the flow resistance of the gas-phase working fluid and the liquid-phase working fluid can be reduced in the internal space of the connection portion between the container and the tube body, and the scattering of the liquid-phase working fluid by the gas-phase working fluid is prevented. In addition, since the liquid phase working fluid is smoothly recirculated, excellent heat transport characteristics can be exhibited. In addition, since the liquid-phase working fluid flow path and the gas-phase working fluid flow path are reliably separated in the internal space of the connection portion between the container and the tube, the liquid-phase working fluid in the connection section is separated. Can be prevented.

  According to the aspect of the present invention, since the wick structure is not formed on the other surface of the partition wall, the liquid-phase working fluid channel and the gas-phase working fluid channel can be more reliably separated. .

  According to the aspect of the present invention, the capillary inner surface facing the one surface of the partition wall and the one surface of the partition wall because the capillary force on one surface of the partition wall is the same as or larger than the capillary force of the inner surface of the tube body. The liquid-phase working fluid flow path is more reliably formed between the two parts. Therefore, the flow path of the liquid-phase working fluid and the flow path of the gas-phase working fluid can be more reliably separated.

  According to the aspect of the present invention, since the wick structure on one side of the partition wall is in contact with the bottom of the container inner surface, the liquid-phase working fluid can be reliably refluxed from the tube to the bottom of the container inner surface. it can. Therefore, the liquid-phase working fluid can be smoothly returned to the heat receiving portion of the container.

  According to the aspect of the present invention, since the wick structure on one surface of the partition wall is in contact with the inner surface of the tube body on the side far from the heat source, the flow path of the liquid-phase working fluid can be formed more reliably.

  According to the aspect of the present invention, the distal end portion and the central portion of the tubular body are not provided with a partition wall, thereby reliably separating the liquid-phase working fluid flow path and the gas-phase working fluid flow path. However, a decrease in the working fluid condensation efficiency can be prevented.

(A) The figure is a fragmentary side sectional view of the vapor chamber according to the first embodiment of the present invention, and (b) is an explanatory view of the inside of the vapor chamber according to the first embodiment of the present invention. It is a partial explanatory view inside the vapor chamber concerning the example of a 2nd embodiment of the present invention. It is a partial explanatory view inside the vapor chamber concerning the example of a 3rd embodiment of the present invention. It is explanatory drawing of the usage method example of the vapor chamber of this invention.

  The vapor chamber according to the first embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 (a) and 1 (b), the vapor chamber 1 according to the first embodiment of the present invention includes two opposing plate-like bodies, that is, one plate-like body 11 and one plate. A container 10 in which a cavity 13 is formed by overlapping the other plate-like body 12 facing the other, and a tubular body connected to the other plate-like body 12 and in which the cavity 13 communicates with the internal space. 20 and a working fluid sealed in a space from the cavity 13 to the inside of the tube body 20. A heating element (not shown), which is an object to be cooled, is thermally connected to the outside of the bottom surface of one plate-like body 11.

  One plate-like body 11 has a flat plate shape, and the other plate-like body 12 has a flat plate shape. Therefore, the shape of the container 10 is a planar type. One plate-like body 11 has a recess at the center. A concave portion of one plate-like body 11 forms a hollow portion 13 of the container 10. The shape of the container 10 is not particularly limited, but the vapor chamber 1 has a rectangular shape in plan view (viewed from the vertical direction with respect to the flat portion of the vapor chamber 1). The cavity 13 is decompressed by a deaeration process.

  A tube body 20 is provided at a portion of the other plate-like body 12 corresponding to the hollow portion 13. The shape of the tube body 20 is not particularly limited, but in the vapor chamber 1, the shape in the longitudinal direction is linear, and the shape in the direction orthogonal to the longitudinal direction is circular. The tube body 20 is erected vertically with respect to the surface of the other plate-like body 12.

  The end of the tube 20 on the side of the cavity 13 (hereinafter sometimes referred to as “base”) is open, and the end opposite to the cavity 13 (hereinafter also referred to as “tip”). Is blocked. Further, the hollow space 13 and the internal space of the tubular body 20 are in communication with each other, and the internal space of the tubular body 20 is decompressed by the deaeration process, similarly to the hollow space 13.

  As shown in FIGS. 1A and 1B, the other plate-like body 12 is formed with a through hole 14 for attaching the tube body 20 to the container 10. The shape and size of the through hole 14 correspond to the shape and size of the tube body 20, and the tube body 20 is inserted into the through hole 14 of the other plate-like body 12 by inserting the base portion of the tube body 20. The other plate-like body 12 is connected. Therefore, the pipe body 20 and the container 10 are made of different members. A method for fixing the tube body 20 attached to the container 10 to the other plate-like body 12 is not particularly limited, and examples thereof include welding, soldering, and brazing.

  Since the pipe body 20 and the container 10 are made of different members, the arrangement, shape, dimensions and the like of the pipe body 20 can be freely selected, and the degree of freedom in designing the vapor chamber 1 is improved. Further, in the vapor chamber 1, the tube body 20 can be attached to the container 10 by fitting the tube body 20 into the through hole 14 of the other plate-like body 12, so that assembly is easy.

  Further, as shown in FIGS. 1A and 1B, the end of the tubular body 20 on the side of the cavity 13 is not in contact with one plate-like body 11. Therefore, the working fluid can flow between the cavity 13 of the container 10 and the internal space of the pipe body 20.

  As shown in FIGS. 1 (a) and 1 (b), the connecting portion between the container 10 and the tubular body 20, that is, the boundary portion 22 and the boundary portion 22 between the hollow portion 13 of the container 10 and the internal space of the tubular body 20 are shown. In the vicinity, a partition wall 30 that is integral with one plate-like body 11 of the container 10 and separate from the tube body 20 is disposed. The partition wall 30 is provided in a state of protruding from the bottom of the flat cavity portion 13. Since the partition wall 30 is integrally formed with or integrated with the one plate-like body 11 of the container 10, the partition wall 30 is in a state where it cannot be attached to and detached from the one plate-like body 11. The “separate body” means that neither integral molding nor integration is performed.

  The partition wall 30 is, for example, a flat plate-like (a strip shape in the vapor chamber 1) protruding portion, and one surface 31 corresponding to the surface of the flat plate-like protruding portion and the other surface corresponding to the back surface of the flat plate-like protruding portion. Surface 32. The partition wall 30 that is integral with one plate-like body 11 is formed integrally with one plate-like body 11 by forging or the like, or a plate-like member that is a separate member from one plate-like body 11 is formed on one plate. It can be formed by joining to the body 11 by welding or the like and performing an integral process.

  The partition wall 30 extends from the bottom of the container 10 to the base of the tube body 20 in a direction substantially parallel to the longitudinal direction of the tube body 20. In the vapor chamber 1, the partition wall 30 is disposed at the base of the tube body 20 in the connection portion between the container 10 and the tube body 20, that is, in the internal space of the tube body 20. In addition, the partition wall 30 is not extended in the central portion (a portion between the tip portion and the base portion).

  A first wick structure 33 that generates a capillary force is provided on one surface 31 of the partition wall 30. On the other hand, the wick structure is not provided on the other surface 32 of the partition wall 30. Therefore, among the two surfaces of the partition wall 30, the capillary force of one surface 31 is larger than the capillary force of the other surface 32. Although it does not specifically limit as the 1st wick structure 33, For example, the sintered compact of metal powders, such as copper powder, the metal mesh which consists of metal wires, a groove, a nonwoven fabric, etc. can be mentioned. In the vapor chamber 1, a metal powder sintered body is used as the first wick structure 33.

  On the other hand, a second wick structure 21 that generates a capillary force, which is different from the first wick structure 33, is provided on the inner surface of the tube body 20. In the vapor chamber 1, the second wick structure 21 is formed so as to cover the entire inner surface of the tube body 20. The capillary force of the first wick structure 33 of the partition wall 30 is equal to or greater than the capillary force of the second wick structure 21 on the inner surface of the tube body 20. Although it does not specifically limit as the 2nd wick structure 21, For example, the sintered compact of metal powders, such as copper powder, the metal mesh which consists of metal wires, a groove, a nonwoven fabric, etc. can be mentioned.

  Further, in the vapor chamber 1, the dimension between the one surface 31 and the inner surface portion of the tube body 20 facing the one surface 31 is the same as the other surface 32 and the inner surface portion of the tube body 20 facing the other surface 32. The partition wall 30 is disposed so as to be smaller than the dimension between the two. That is, the partition wall 30 is installed such that one surface 31 is arranged in the inner surface direction of the tube body 20 with respect to the central axis in the circumferential direction of the tube body 20. In the vapor chamber 1, the first wick structure 33 provided on the one surface 31 is not in contact with the second wick structure 21 of the tube body 20, and the first wick structure 33. And a second wick structure 21 of the tubular body 20 is formed with a gap.

  In addition, the partition wall 30 is disposed so as to be far from the heating element that is a heat source in the internal space of the tube body 20. Accordingly, when the heating element is thermally connected to the central portion of the container 10, as shown in FIGS. 1A and 1B, the peripheral portion side of the container 10 in the inner space of the tubular body 20. In addition, a partition wall 30 is disposed.

  Since the first wick structure 33 is provided so as to cover one surface 31, the first wick structure 33 is in contact with the inner surface of one plate-like body 11 in the cavity portion 13. . That is, the first wick structure 33 is in contact with the bottom of the inner surface of the container 10 that forms the cavity 13.

  Examples of the material of the container 10 and the pipe body 20 having the partition wall 30 include copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, stainless steel, and titanium. The working fluid sealed in the hollow space 13 and the internal space of the tube body 20 can be selected as appropriate according to the compatibility with the material of the partition wall 30, the container 10 and the tube body 20, for example, water, fluorocarbons, Examples thereof include cyclopentane, ethylene glycol, and mixtures thereof.

  Although it does not specifically limit as thickness of the container 10, For example, 1.0-5.0 mm can be mentioned, Although the thickness of the one plate-shaped body 11 and the other plate-shaped body 12 is not specifically limited. For example, one plate-like body 11 may be 0.9 to 4.7 mm, and the other plate-like body 12 may be 0.1 to 0.3 mm. Moreover, although the thickness of the cavity part 13 is not specifically limited, For example, 0.4-4.8 mm can be mentioned. Although the thickness of the partition 30 is not specifically limited, For example, 0.1-0.3 mm can be mentioned.

  Next, the heat transport system of the vapor chamber 1 will be described with reference to FIGS. A heating element, which is a body to be cooled, is thermally connected to the back surface of container 10 (the outer surface of one plate-like body 11). When one plate-like body 11 receives heat from the heating element, heat is transferred from the one plate-like body 11 to the liquid-phase working fluid L in the cavity 13, and the liquid-phase working fluid L is generated in the cavity 13. The phase changes to a gas-phase working fluid G. Since the cavity 13 of the container 10 communicates with the internal space of the pipe body 20 connected to the container 10, the gas phase working fluid G changed in phase from the liquid phase working fluid L is piped from the cavity 13. It flows into the internal space of the body 20. The gas-phase working fluid G that has flowed into the inner space of the tube body 20 releases latent heat inside the tube body 20 and changes into a liquid-phase working fluid L. The working fluid phase-changed from the gas phase to the liquid phase inside the tube body 20 is moved from the central portion and the tip portion of the tube body 20 by the second wick structure 21 on the inner surface of the tube body 20. That is, it returns to the boundary 20 between the hollow portion 13 of the container 10 and the internal space of the tubular body 20 and the vicinity thereof in the tubular body 20.

  The partition wall 30 provided at the base of the tubular body 20 has one surface 31 and the other surface 32, and the one surface 31 provided with the first wick structure 33 has a capillary force, and the wick The other surface 32 where no structure is provided has no capillary force. Therefore, one surface 31 of the partition wall 30 and one surface of the partition wall 30 in the internal space of the connecting portion between the container 10 and the tubular body 20 due to the difference in capillary force between the one surface 31 side and the other surface 32 side. The liquid-phase working fluid L (that is, the second wick structure 21 on the inner surface of the tube body 20 is refluxed from the central portion and the distal end portion to the base portion between the portion of the inner surface of the tube body 20 and the inner surface of the tube body 20. The liquid phase working fluid L and the liquid phase working fluid L) condensed at the base of the tube body 20 are formed. Further, since the first wick structure 33 extends to the bottom of the cavity 13, that is, the inner surface of one plate-like body 11, the liquid-phase working fluid L is contained in the first wick of the partition wall 30. Through the structure 33, reflux is performed from the base of the tube 20 to the bottom of the cavity 13.

  On the other hand, the space between the other surface 32 of the partition wall 30 and the inner surface of the tube body 20 not facing the one surface 31 of the partition wall 30 in the internal space of the connection portion between the container 10 and the tube body 20 is a hollow portion. 13 is a flow path of the working fluid G in a gas phase flowing from 13 to the internal space of the tube body 20. Therefore, in the vapor chamber 1, in the internal space of the tube body 20, the flow path of the liquid-phase working fluid L that flows back from the tube body 20 toward the cavity portion 13 and the gas phase flowing from the cavity portion 13 toward the tube body 20. The working fluid G is reliably separated from the flow path.

  Since the third wick structure 15 that is different from the first wick structure 33 and the second wick structure 21 is provided inside the cavity portion 13, The liquid-phase working fluid L that has refluxed to the bottom flows back through the third wick structure 15 to the region of the cavity 13 where the heating element is thermally connected.

  In the vapor chamber 1 according to the first embodiment, the partition wall 30 causes the liquid-phase working fluid L to flow back from the tube body 20 toward the cavity portion 13 and the gas phase flowing from the cavity portion 13 toward the tube body 20. Therefore, the flow resistance of the gas-phase working fluid G and the liquid-phase working fluid L is reduced in the internal space of the connection portion between the container 10 and the pipe body 20. In addition, the liquid-phase working fluid L can be prevented from being scattered by the gas-phase working fluid G, and the liquid-phase working fluid L can be smoothly recirculated. Therefore, the vapor chamber 1 can exhibit excellent heat transport characteristics. In addition, in the internal space of the connection portion between the container 10 and the tube 20, the flow path of the liquid-phase working fluid L and the flow path of the gas-phase working fluid G are reliably separated. The pool of the working fluid L of the phase can be prevented.

  In the vapor chamber 1 according to the first embodiment, the capillary force of the first wick structure 33 of the partition wall 30 is the same as or greater than the capillary force of the second wick structure 21 of the tube 20. The flow path of the liquid-phase working fluid L is more reliably formed between the one surface 31 of the partition wall 30 and the inner surface of the tubular body 20. Therefore, the flow path of the liquid-phase working fluid L and the flow path of the gas-phase working fluid G can be more reliably separated. In addition, since the capillary force of the first wick structure 33 of the partition wall 30 is larger than the capillary force of the second wick structure 21 of the tube body 20, the flow path of the liquid-phase working fluid L and the operation of the gas phase Separation of the fluid G from the flow path can be further promoted.

  In the vapor chamber 1 according to the first embodiment, the first wick structure 33 of the partition wall 30 is in contact with the bottom of the cavity 13 to which the heating element is thermally connected. The fluid L can be reliably returned to the region where the heating element on the inner surface of the container 10 is thermally connected.

  Further, in the vapor chamber 1 according to the first embodiment, since the partition wall 33 is not provided at the distal end portion and the central portion of the tube body 20, the flow of the liquid-phase working fluid L at the base portion of the tube body 20. It is possible to obtain excellent working fluid condensation efficiency in the tube body 20 (the front end portion and the center portion of the tube body 20) while reliably separating the passage and the flow path of the gas-phase working fluid G.

  Next, a vapor chamber according to a second embodiment of the present invention will be described with reference to the drawings. The same components as those of the vapor chamber according to the first embodiment will be described using the same reference numerals.

  In the vapor chamber according to the first embodiment, the first wick structure 33 provided on one surface 31 is not in contact with the second wick structure 21 of the tubular body 20, and the first wick structure 33 is not in contact with the second wick structure 21. A gap is formed between the wick structure 33 and the second wick structure 21 of the tube body 20, but instead of this, as shown in FIG. 2, the vapor according to the second embodiment is provided. In the chamber 2, at least a partial region of the first wick structure 33 provided on the one surface 31 is in contact with the second wick structure 21 of the tube body 20.

  In the vapor chamber 2 according to the second embodiment, the first wick structure 33 is in contact with the second wick structure 21 of the tubular body 20, so that the liquid-phase working fluid L is more smoothly second. Since the wick structure 21 can flow into the first wick structure 33, the flow path of the liquid-phase working fluid L can be more sufficiently separated from the flow path of the gas-phase working fluid G.

  Next, a vapor chamber according to a third embodiment of the present invention will be described with reference to the drawings. The same components as those of the vapor chambers according to the first and second embodiments will be described using the same reference numerals.

  In the vapor chambers according to the first and second embodiments, the partition wall 30 is integral with one plate-like body 11 of the container 10 and is separate from the tube body 20. As shown in FIG. 3, in the vapor chamber 3 according to the third embodiment, the partition wall 30 is integrated with the pipe body 20 and is separate from the one plate-like body 11 of the container 10. In the vapor chamber 3, a plate-like member for the partition wall 30, which is a separate member, is integrated with the tube body 20. For example, the first wick structure 33 of the partition wall 30 is sintered with the second wick structure 21 of the tube body 20, so that the partition wall 30 and the tube body 20 are integrated. Therefore, the partition wall 30 is fixed in a state where it cannot be attached to and detached from the tube body 20.

  Further, the end of the partition wall 30 on the one plate-like body 11 side is in contact with the one plate-like body 11. The first wick structure 33 covers one surface 31. Therefore, the first wick structure 33 is in contact with the bottom of the inner surface of the container 10 constituting the cavity 13.

  In the vapor chamber 3 according to the third embodiment, the partition wall 30 is integrated with the tube body 20, and the first wick structure body 33 is connected to the second wick structure body 21 of the tube body 20, Similarly to the vapor chamber 2, the liquid-phase working fluid L can flow into the first wick structure 33 more smoothly, so the flow path of the liquid-phase working fluid L is changed from the flow path of the gas-phase working fluid G. More fully separable.

  Next, an example of how to use the vapor chamber of the present invention will be described with reference to the drawings. Here, the vapor chamber 1 according to the first embodiment will be described as an example.

  As shown in FIG. 4, for example, a heating element (not shown) is thermally connected to the outer surface of one plate-like body 11 of the container 10, that is, the back surface of the container 10, and the other plate-like body 12 of the container 10. The aspect which attaches a heat exchanging means (in FIG. 4, the several heat radiation fin 100) to the several pipe body 20 attached to is mentioned. That is, the usage method which connects a heat exchange means to the pipe body 20 of the vapor chamber 1 is mentioned. As a method for attaching the radiating fin 100 to the vapor chamber 1, for example, there is a method in which a hole corresponding to the size, shape and position of the tubular body 20 is provided in the radiating fin 100 and the tubular body is fitted into the hole. Can be mentioned. Heat from the heating element transported from the container 10 to the tube body 20 is released to the outside environment of the vapor chamber 1 through the radiation fins 100.

  Next, another embodiment of the vapor chamber of the present invention will be described. In the vapor chamber of each of the above embodiments, the wick structure is not provided on the other surface of the partition wall. Instead, the wick having a smaller capillary force than the first wick structure on one surface is provided. If it is a structure, a wick structure may be provided on the other surface as necessary.

  Further, in each of the above embodiments, the partition wall 30 has a flat plate shape, that is, the shape on one surface side of the partition wall does not correspond to the shape on the inner surface side of the portion of the tubular body facing the one surface. However, instead of this, the shape on the one surface side of the partition may correspond to the inner surface side shape of the portion of the tubular body facing the one surface. For example, a tubular body having a circular shape in a direction orthogonal to the longitudinal direction has a predetermined curvature radius on the inner surface side shape in the direction orthogonal to the longitudinal direction. The shape of the surface side in plan view may be an arc having the same radius of curvature as the predetermined radius of curvature.

  Further, in the vapor chambers of the above embodiments, the partition wall does not extend at the distal end portion and the central portion of the tubular body. Instead of this, depending on the use conditions of the vapor chamber, etc., the tubular body You may extend a partition to the front-end | tip part or center part.

  Further, in the vapor chamber of each of the above embodiments, the shape of the tube in the longitudinal direction is linear, but instead of this, a shape having a bent portion such as an L shape may be used. In the vapor chambers of the above embodiments, the shape perpendicular to the longitudinal direction of the tube body is circular, but may be flat, elliptical, or the like. Furthermore, in the vapor chamber of each of the above-described embodiments, the shape of the container in plan view is rectangular, but can be changed as appropriate according to usage conditions and the like, and may be, for example, circular.

  In the vapor chambers of the above embodiments, the container is a flat type. However, instead of this, a tubular container may be used, and the shape perpendicular to the longitudinal direction of the tubular container is There is no particular limitation, and examples thereof include a circle, an ellipse, a polygon, and a rounded rectangle. The tubular container may be a flat container that has been flattened.

  The vapor chamber of the present invention reduces the flow resistance of the liquid-phase working fluid, prevents the liquid-phase working fluid from being scattered by the gas-phase working fluid, and facilitates the recirculation of the liquid-phase working fluid. Since it exhibits excellent heat transport characteristics, it can be used in a wide range of fields. For example, it can be used for cooling a heating element mounted on an electronic device such as a vehicle or a personal computer.

1, 2, 3 Vapor chamber 10 Container 11 One plate-like body 12 The other plate-like body 20 Tubular body 30 Bulkhead 31 One surface 32 The other surface 33 First wick structure

Claims (10)

A container in which a hollow cavity is formed, a tube connected to the container and communicating with the cavity and the internal space, and a working fluid sealed in a space from the cavity to the inside of the tube, Have
A partition that is integral with the container is provided at a connection portion between the container and the tubular body,
The partition wall has one surface and the other surface, and a wick structure that generates a capillary force is formed on the one surface, and the capillary force on the one surface is larger than the capillary force on the other surface. Vapor chamber. A container in which a hollow cavity is formed, a tube connected to the container and communicating with the cavity and the internal space, and a working fluid sealed in a space from the cavity to the inside of the tube, Have
The connecting portion between the container and the pipe body is provided with a partition wall integrated with the pipe body,
The partition wall has one surface and the other surface, and a wick structure that generates a capillary force is formed on the one surface, and the capillary force on the one surface is larger than the capillary force on the other surface. Vapor chamber.   The vapor chamber according to claim 1 or 2, wherein the container is formed by one plate-like body and the other plate-like body facing the one plate-like body.   The vapor chamber according to any one of claims 1 to 3, wherein a wick structure is not formed on the other surface of the partition wall.   5. The vapor chamber according to claim 1, wherein the capillary force on the one surface of the partition wall is equal to or greater than the capillary force on the inner surface of the tubular body.   2. The vapor chamber according to claim 1, wherein a shape of the one surface side of the partition corresponds to an inner surface side shape of a portion of the tubular body facing the one surface.   The vapor chamber according to claim 2, wherein the wick structure on the one surface of the partition wall is in contact with the bottom of the inner surface of the container.   The vapor chamber according to any one of claims 1 to 7, wherein the wick structure on the one surface of the partition wall is in contact with the inner surface of the tube body on the side far from the heat source.   The vapor chamber according to any one of claims 1 to 8, wherein the partition wall is not provided at a distal end portion of the tubular body.   The vapor chamber according to any one of claims 1 to 9, wherein the partition wall is not provided at a distal end portion and a central portion of the tubular body.

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