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WO2006115073A1 - Chemise a refroidissement liquide - Google Patents

Chemise a refroidissement liquide Download PDF

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Publication number
WO2006115073A1
WO2006115073A1 PCT/JP2006/307846 JP2006307846W WO2006115073A1 WO 2006115073 A1 WO2006115073 A1 WO 2006115073A1 JP 2006307846 W JP2006307846 W JP 2006307846W WO 2006115073 A1 WO2006115073 A1 WO 2006115073A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid cooling
flow path
cooling jacket
heat
fin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2006/307846
Other languages
English (en)
Japanese (ja)
Inventor
Yoshimasa Kasezawa
Hisashi Hori
Harumichi Hino
Tsunehiko Tanaka
Takeshi Yoshida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Light Metal Co Ltd
Original Assignee
Nippon Light Metal Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Light Metal Co Ltd filed Critical Nippon Light Metal Co Ltd
Priority to US11/918,876 priority Critical patent/US20090065178A1/en
Publication of WO2006115073A1 publication Critical patent/WO2006115073A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/473—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/068—Shaving, skiving or scarifying for forming lifted portions, e.g. slices or barbs, on the surface of the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Definitions

  • the present invention relates to a liquid cooling jacket that cools a heat generating body such as a CPU.
  • an object of the present invention is to provide a liquid cooling jacket that can efficiently cool a heat generating body such as a CPU that solves the above problems.
  • the present invention provides a heat generating body attached to a predetermined position, and heat generated by the heat generating body is supplied from an external heat transport fluid supply means.
  • a flow path group and a third flow path that collects the plurality of second flow paths on the downstream side of the plurality of second flow paths, and the heat generator is the main part of the second flow path group. It is a liquid cooling jacket characterized by heat exchange.
  • the heat transport fluid from the external heat transport fluid supply means is supplied to the first flow path.
  • the second flow path group and the third flow path are distributed in this order.
  • the heat generated by the heat generating body is transferred to the heat transporting fluid mainly through heat exchange in the second flow path group.
  • the heat generator is suitably cooled.
  • the second flow path group is composed of a plurality of second flow paths branched from the first flow path, and the plurality of second flow paths are assembled in the third flow path.
  • the length of each second flow path is dramatically shortened.
  • the pressure loss of the heat transport fluid that flows through the plurality of second flow paths is significantly smaller than the pressure loss of the heat transport fluid that flows through the second flow path having the one long flow path length.
  • the adjacent second flow paths are completely isolated like the second flow paths B5a and B5a related to the liquid cooling jacket J6 according to the sixth embodiment described later (see FIG. 26). You don't have to!
  • an external heat transport fluid supply means for example, a pump
  • a small output is used to supply the heat transport fluid and distribute the heat transport fluid in the liquid cooling jacket. It is possible to efficiently cool the heat generating body such as.
  • the heat generating body is attached at a predetermined position, and the heat generated by the heat generating body is supplied from an external heat transport fluid supply means and is transmitted to the heat transport fluid flowing through the inside.
  • a liquid cooling jacket having a first flow path, a plurality of second flow path groups including a plurality of second flow paths, and a third flow path toward the downstream side;
  • the generator is a liquid cooling jacket mainly exchanging heat in the second flow path group, and the adjacent second flow path groups are connected in series via a connection flow path.
  • the second channel group has a plurality of second channel groups, and the plurality of second channel groups are liquid cooling jackets arranged in series.
  • a plurality of second flow paths are provided by including a plurality of second flow path groups (second flow path group portions) connected in series via a connection flow path. Heat exchange is possible between the group and the heat generator.
  • the adjacent second flow path groups are arranged in parallel, and one downstream end and the other upstream end are on the same side.
  • the adjacent second flow path group portions are juxtaposed, and one downstream end and the other upstream end are liquid cooling jackets on the same side.
  • the heat exchange fluid passes through one of the second flow path groups adjacent in the flow direction of the heat exchange fluid, the other of the connection flow paths, and the other of the adjacent second flow path groups. It circulates to meander through. Therefore, when the size of the liquid cooling jacket in a plan view is constant, if the number of second flow path groups is increased without changing the number of second flow paths that constitute each second flow path group, The channel cross-sectional area of each second channel constituting each second channel group is reduced. Therefore, when the flow rate of the heat transport fluid flowing through the liquid cooling jacket is constant, the flow velocity of the heat transport fluid in each second flow channel increases as the number of second flow channel groups increases. Therefore, the heat transfer rate from the liquid cooling jacket to the heat transport fluid increases, and as a result, the thermal resistance of the liquid cooling jacket decreases.
  • the adjacent second flow path groups are not arranged side by side, for example, arranged in a single line in the flow path direction, the number of second flow path groups increases.
  • the channel length of each second channel constituting each second channel group is shortened, its cross-sectional area is not reduced, and the flow rate of the heat exchange fluid is not increased. Therefore, the thermal resistance of the liquid cooling jacket does not decrease.
  • the number of second flow path groups is an even number, the inlet and outlet of the heat transport fluid to the liquid cooling jacket can be arranged on the same side, and as a result, the piping connected to the liquid cooling jacket can be routed. Becomes easy.
  • a tube bundle in which a plurality of metal tubes are bundled is provided, and a hollow portion of each tube is the second flow path.
  • Such a liquid cooling jacket includes a tube bundle formed by bundling metal tubes, so that the hollow portion of each tube becomes the second flow path, and the liquid cooling jacket can be easily configured.
  • the number and thickness of the metal pipes to be bundled the number and thickness of the second flow paths (flow channel cut area) can be easily changed.
  • a metal tube having a plurality of hollow portions is provided, and each of the hollow portions is the second flow path.
  • the liquid cooling jacket can be easily configured using a metal tube having a plurality of hollow portions.
  • the width W of the second flow path is 0.2 to 1. Omm.
  • the thermal resistance and the pressure loss experienced by the heat transport fluid passing through the inside can be in a favorable range.
  • width W of the second flow path and the thickness T of the fin between the adjacent second flow paths satisfy the following expression (1).
  • a fin member configured to include the plurality of metal fins and a base plate on which the plurality of metal fins are erected, a jacket body that accommodates the fin members, And the base plate is fixed to the jacket body so as to allow heat exchange.
  • Such a liquid cooling jacket for example, cuts a metal extrusion mold material having a bottom plate serving as a base plate and a plurality of strips serving as a plurality of fins provided upright on the bottom plate. After producing a fin member provided with metal fins, a liquid cooling jacket can be formed by fixing the fin member to, for example, a box-shaped jacket body.
  • a fin member including the fins.
  • a first fin member comprising a first base plate and a plurality of first fins standing on the first base plate, a second base plate, and standing on the second base plate
  • a second fin member comprising a plurality of second fins, wherein the first fin member and the second fin member include the plurality of first fins and the plurality of second fins.
  • the plurality of metal fins are composed of the first fin and the second fin, and the adjacent first fin and second fin are combined. The second flow path is formed between the two.
  • Such a liquid cooling jacket is composed of a plurality of first fins and a plurality of second fins, even if the interval between the first fins and the interval between the second fins are widened, The distance between adjacent metal fins, that is, the distance between the first fin and the second fin can be reduced.
  • the heat generating body is attached to the first base plate side, and the protruding length of the first fin is set to be the same as or shorter than the protruding length of the second fin, 2
  • the fin and the first base plate are thermally connected.
  • the first fin has a protruding length that is the same as the protruding length of the second fin, or shorter than the protruding length of the second fin.
  • the plurality of second fins securely contact the first base plate, and the plurality of second fins and the first base plate are joined so as to be capable of heat exchange. Can be configured. Then, the heat of the heat generating body attached to the first base plate side is transmitted to the plurality of first fins and the plurality of second fins via the first base plate. This heat can then be transferred to the heat transport fluid flowing through the second flow path between the first fin and the second fin.
  • the jacket main body includes a jacket main body having a fin housing chamber that houses the plurality of metal fins, and a sealing body that seals the fin housing chamber, and surrounds the fin housing chamber.
  • the joint portion of the peripheral wall and the sealing body is friction stir welded, and the start end and the end of the friction stir weld overlap
  • brazing material since the sealing body and the jacket body are joined by friction stir welding without using brazing material, there is no possibility that the heat transport fluid (refrigerant) is contaminated by brazing material. There is no risk of corrosion of brazing material or other equipment such as micropumps and radiators that make up the system.
  • the plurality of metal fins are erected on the sealing body and are integral with the sealing body.
  • a liquid cooling jacket since the plurality of metal fins and the sealing body are a single body, the fin housing chamber is sealed with the sealing body, and at the same time, the plurality of metal fins are sealed.
  • the fin can be arranged at a predetermined position in the fin housing chamber. That is, the production process of the liquid cooling jacket can be reduced, and the production can be easily performed and the production cost can be reduced.
  • a plurality of fins made of metal and a sealing body in this way are, for example, a plate made of an aluminum alloy (plate material) as shown in a fifth embodiment to be described later. It can be obtained by paying.
  • the fin and the sealing body are formed as a single body by a skive cage or the like, it is naturally not necessary to join the fin and the sealing body with a brazing material or the like. Thus, contamination of the heat transport fluid can be prevented.
  • the fin and the sealing body are a single body, the heat transferability between them is high. Therefore, if a heat generating body such as a CPU is attached to the sealing body, the heat of the heat generating body is transferred well to the plurality of fins through the sealing body. As a result, the heat dissipation performance of the heat generator in the liquid cooling jacket is enhanced.
  • the friction stir welding is performed while applying a jig to the peripheral wall so that the peripheral wall is not deformed outward.
  • the peripheral wall is deformed outward by the friction stir welding.
  • the distance (gap) between the outer peripheral surface of the shoulder and the outer peripheral surface of the peripheral wall in the tool used for friction stir welding where the peripheral wall is thin is, for example, 2. Omm or less.
  • friction stir welding can be performed without deforming the peripheral wall.
  • the length of the pin of the tool used for the friction stir welding is 60% or less of the thickness of the sealing body.
  • a metal honeycomb body having a plurality of pores is provided, and the pores are the second flow paths.
  • a metal heat exchange sheet having a corrugated cross section and a metal jacket main body to which the heat exchange sheet is fixed so as to be able to exchange heat, the space between the heat exchange sheet and the jacket main body.
  • the second flow path is formed.
  • Such a liquid cooling jacket can be easily configured by fixing a heat exchange sheet having a corrugated cross section to the jacket body so that heat exchange is possible.
  • the metal is aluminum or an aluminum alloy.
  • the metal is made of aluminum or an aluminum alloy, so that the weight is reduced.
  • the heat transport fluid intake port communicating with the first flow path and the heat transport fluid discharge port communicating with the third flow path are arranged symmetrically with respect to the heat generator. It is characterized by being.
  • the heat transport fluid supplied to the first flow path of the intake locus can easily flow through the second flow path in the vicinity of the heat generator. This generates heat in the heat transport fluid Heat exchange can be suitably performed with the body.
  • the intake port and the discharge port are arranged so as to be relatively distant from each other.
  • the heat transport fluid supplied to the first flow path of the intake rocker can easily flow through the plurality of second flow paths. Accordingly, heat exchange can be suitably performed between the heat transport fluid that flows through the entire plurality of second flow paths and the heat generator.
  • the intake port and the discharge port are arranged so as to be close to the heat generating body.
  • the heat transport fluid supplied to the first flow path of the intake rocker can easily flow through the second flow path near the heat generator at a high flow rate.
  • heat exchange can be suitably performed between the heat transport fluid and the heat generator that circulate at this high flow rate. That is, for example, it is not attached to the liquid cooling jacket via a heat diffusion sheet 102 (refer to FIG. 3) called a heat generation body heat spreader such as a CPU, and the heat of the heat generation body is distributed over the entire liquid cooling jacket.
  • a heat diffusion sheet 102 (refer to FIG. 3) called a heat generation body heat spreader such as a CPU
  • the heat generating body is a CPU.
  • FIG. 1 is a configuration diagram of a liquid cooling system according to a first embodiment.
  • FIG. 2 is an overall perspective view of the liquid cooling jacket according to the first embodiment.
  • FIG. 3 is an overall perspective view of the downward force of the liquid cooling jacket according to the first embodiment.
  • FIG. 4 is a perspective view of the liquid cooling jacket according to the first embodiment, with the lid unit omitted. Indicates.
  • FIG. 5 is a plan view of the liquid cooling jacket according to the first embodiment.
  • FIG. 6 is an XX cross-sectional view of the liquid cooling jacket according to the first embodiment shown in FIG.
  • FIG. 7 is an exploded perspective view of the liquid cooling jacket according to the first embodiment.
  • FIG. 9 is an overall perspective view of the liquid cooling jacket according to the second embodiment, showing a state in which the lid unit is omitted.
  • FIG. 10 is a YY sectional view of the liquid cooling jacket according to the second embodiment shown in FIG.
  • FIG. 11 An overall perspective view of a liquid cooling jacket according to a third embodiment.
  • FIG. 12 is a plan view of a liquid cooling jacket according to a third embodiment.
  • FIG. 13 An overall perspective view of the liquid cooling jacket according to the fourth embodiment, showing a state where the lid unit is omitted.
  • FIG. 14 is a ZZ cross-sectional view of the liquid cooling jacket according to the fourth embodiment shown in FIG.
  • FIG. 15 is an enlarged view of the ZZ cross-sectional view shown in FIG.
  • FIG. 16 is a perspective view showing a first method for producing a fin member of a liquid cooling jacket according to a fourth embodiment, where (a) shows before cutting and (b) shows after cutting.
  • FIG. 17 is a perspective view showing a second production method of the fin member of the liquid cooling jacket according to the fourth embodiment, where (a) shows before cutting and (b) shows after cutting.
  • FIG. 18 is a perspective view showing friction stir welding according to a fourth embodiment.
  • FIG. 21 is a cross-sectional view of a liquid cooling jacket according to a fifth embodiment.
  • FIG. 22 is an enlarged view of the cross-sectional view shown in FIG.
  • FIG. 23 A diagram showing a method for producing a fin member of a liquid cooling jacket according to a fifth embodiment, wherein (a) shows during skive caloe and (b) shows after skive processing.
  • FIG. 24 A diagram showing a method for producing a fin member of the liquid cooling jacket according to the fifth embodiment, showing a state after removing a part of the skive fin shown in FIG. 23 (b). 25] A sectional view showing friction stir welding according to the fifth embodiment.
  • FIG. 26 is a cross-sectional view of a liquid cooling jacket according to a sixth embodiment, where (a) shows a state after assembly and (b) shows a state before assembly.
  • FIG. 27 is a cross-sectional view of a liquid cooling jacket according to a seventh embodiment, where (a) shows a state after assembly and (b) shows a state before assembly.
  • FIG. 28 is a cross-sectional view of a liquid cooling jacket according to an eighth embodiment, where (a) shows a state after assembly and (b) shows a state before assembly.
  • FIG. 29 is a plan view of a liquid cooling jacket according to a ninth embodiment.
  • FIG. 30 is a plan view of a liquid cooling jacket according to a tenth embodiment.
  • FIG. 32 is a cross-sectional view of a flat tube bundle according to a modification.
  • FIG. 33 is a cross-sectional view of a liquid cooling jacket according to a modification, where (a) shows a state after assembly and (b) shows a state before assembly.
  • FIG. 34 is a cross-sectional view of a liquid cooling jacket according to a modification.
  • FIG. 35 is a perspective view of a liquid cooling jacket according to a modification.
  • FIG. 37 is a graph showing the relationship between fin thickness, T1Z groove width W1, and thermal resistance.
  • FIG. 38 is a graph showing the relationship between groove width W1 and fin thickness T1Z groove width W1.
  • FIG. 40 is a graph showing the relationship between the groove width W1 and the groove depth D1.
  • FIG. 1 is a configuration diagram of a liquid cooling system according to the first embodiment.
  • FIG. 2 is an overall perspective view of the liquid cooling jacket according to the first embodiment.
  • FIG. 3 is an overall perspective view of the downward force of the liquid cooling jacket according to the first embodiment.
  • FIG. 4 is a perspective view of the liquid cooling jacket according to the first embodiment, showing a state in which the lid unit is omitted.
  • FIG. 5 is a plan view of the liquid cooling jacket according to the first embodiment, omitting the intake pipe and the discharge noise.
  • 6 is an XX cross-sectional view of the liquid cooling jacket according to the first embodiment shown in FIG.
  • FIG. 7 is an exploded perspective view of the liquid cooling jacket according to the first embodiment.
  • FIG. 8 is a graph schematically showing the effect of the liquid cooling jacket according to the first embodiment.
  • the liquid cooling system S1 is a system mounted on a personal computer main body 120 (electronic device) of a tower-type personal computer, and includes a CPU 101 constituting the personal computer main body 120. This is a system that cools (heat generators).
  • the liquid cooling system S1 includes a liquid cooling jacket J1 (see Fig.
  • radiator 121 heat dissipating means
  • cooling Micropump 122 heat transport fluid supply means
  • an ethylene glycol antifreeze is used as the cooling water.
  • the liquid cooling jacket J1 constituting the liquid cooling system S1 will be described in detail.
  • the liquid cooling jacket J1 has a CPU 101 attached to the center (predetermined position) on the lower side (back side) via a heat diffusion sheet 102 (heat spreader). With the CPU 101 attached in this way, cooling water flows through the liquid cooling jacket J1.
  • the liquid cooling jacket Jl receives the heat generated by the CPU 101 and also exchanges heat with the cooling water circulating inside, thereby transferring the heat received from the CPU 101 to the cooling water.
  • the CPU 101 It is designed to be cooled efficiently.
  • the thermal diffusion sheet 102 is a sheet for efficiently transferring the heat of the CPU 101 to the bottom wall 11 of the jacket body 10 described later, and is formed of a metal having high thermal conductivity such as copper, for example. .
  • the liquid cooling jacket J1 mainly includes a jacket body 10, a flat tube bundle 20 (tube bundle), and a lid unit 30. Unless otherwise specified, the jacket body 10, the flat tube bundle 20, and the lid unit 30 are also formed of aluminum or aluminum alloy force. As a result, the liquid cooling jacket J1 is lightweight and easy to handle.
  • the jacket body 10 is a shallow box that opens on the upper side (one side) (see FIG. 7), has a bottom wall 11 and a peripheral wall 12, and accommodates the flat tube bundle 20 inside thereof. It has a storage room (see Fig. 7).
  • a jacket body 10 is produced by, for example, die casting (die casting), forging, forging or the like.
  • the jacket main body 10 has an alignment portion 14 having a shape corresponding to a notch 31c of the lid main body 31 described later at a part of the opening edge.
  • the flat tube bundle 20 has a space 10a and a space 10c on both ends in the jacket body 10 (see FIGS. 4 and 5), and is made of a brazing material such as an A1-Si—Zn-based aluminum alloy. It is fixed to the bottom wall 11 of the jacket body 10 so that heat exchange (heat transfer) is possible (see FIG. 6).
  • the space 10a functions as the first flow path A1
  • the space 1 Oc functions as the third flow path C1.
  • the flat tube bundle 20 is obtained by bundling and joining a predetermined number of flat tubes 21 in the thickness direction (see FIGS. 6 and 7).
  • Each flat tube 21 has one or a plurality of (two in the first embodiment) hollow portions 21a.
  • Each hollow portion 21a functions as a second flow path Bla through which cooling water flows. That is, each of the second flow paths Bla has a rectangular cross-sectional view, and side walls (second flow path constituting parts) composed of the peripheral walls 21b and 21b of the flat tube 21 located on both sides thereof.
  • the upper wall portion (second flow path constituting portion) or the lower wall portion (second flow passage constituting portion) composed of the peripheral wall 21b or the partition wall 21c positioned on the upper and lower sides thereof is surrounded. Accordingly, the flat tube bundle 20 has a plurality of second flow paths Bla, that is, a second flow path group B1 composed of a plurality of second flow paths Bla.
  • the CPU 101 is mounted at a substantially central position on the lower side (outside) of the bottom wall 11 (see FIG. 3).
  • the heat of the CPU 101 is transferred via the bottom wall 11 to the peripheral wall 21b surrounding the hollow portion 21a (second flow path Bla) of each flat tube 21 and the partition wall 21c that cuts the adjacent hollow portion 21a. It is supposed to be.
  • the thermal force transmitted to the peripheral wall 21b and the partition wall 21c is transmitted to the cooling water flowing through each second flow path Bla.
  • the CPU 101 mainly exchanges heat with the cooling water flowing through the second flow path group B1.
  • the peripheral wall 2 lb heat exchange part
  • first flow path Al the second flow path group B1 (a plurality of second flow paths Bla), and the third flow path C1 will be further described.
  • the first channel A1 is a channel through which cooling water is supplied from the micropump 122, and is arranged on the micropump 122 side (upstream side of the second channel group B1).
  • the second flow path group B1 is disposed downstream of the first flow path A1, and each second flow path Bla constituting the second flow path group B1 is branched from the first flow path A1. .
  • the cooling water is distributed from the first flow path A1 and flows into each second flow path Bla.
  • the third flow path C1 is disposed on the downstream side of the second flow path group Bl, that is, the plurality of second flow paths Bla, and collects the plurality of second flow paths Bla. As a result, the cooling water flowing out from each second flow path Bla is collected in the third flow path C1 and then discharged to the outside of the liquid cooling jacket J1.
  • the channel cross-sectional areas of the first channel A1 and the third channel C1 are determined from the channel cross-sectional area of each second channel Bla. It is set large.
  • the flow path length of each second flow path Bla (the length of each flat tube 21) is as follows for one flow path that meanders through all of the portions corresponding to the flat tube bundle 20 according to the conventional technology. , Has become dramatically shorter.
  • each second flow path Bla the pressure loss experienced by the cooling water flowing in the order of the first flow path Al, each second flow path Bla, and the third flow path C1 hardly occurs in the first flow path A1 and the third flow path C1.
  • the pressure loss received from the single meandering flow path is drastically reduced.
  • the rated output of the micropump 122 that supplies the cooling water to the liquid cooling jacket J1 can be lowered, and the micropump 122 can be reduced in size and noise.
  • the lid unit 30 mainly includes a lid main body 31, an intake pipe 32, and a discharge pipe 33.
  • the lid body 31 is joined and fixed to the jacket body 10 so as to cover the jacket body 10 containing the flat tube bundle 20.
  • the lid body 31 is formed with the force of the intake port 31a communicating with the first flow path A1 (space 10a) and the discharge port 31b communicating with the third flow path C1 (space 10c) (see FIG. 7). .
  • the lid body 31 has a cutout portion 31c that is cut out, and the shape of the cutout portion 31c matches the alignment portion 14 of the jacket body 10. Thereby, the lid body 31 (lid unit 30) is combined with the jacket body 10 only in a predetermined direction.
  • the intake port 31a and the discharge port 31b are arranged symmetrically with respect to the CPU 101 in plan view, and are arranged so as to be relatively distant from each other.
  • the intake port 31a, the discharge port 31b, and the CPU 101 are arranged on a diagonal line of the liquid cooling jacket J1 having a square shape in plan view. More specifically, the intake port 31a is disposed on the upper left side in FIG. 5, while the discharge port 31b is disposed on the lower right side in FIG. 5, and the intake port 3 la and the discharge port 3 lb.
  • the CPU 101 is arranged at a substantially middle position (approximately the center of the liquid cooling jacket J 1 having a square shape).
  • the cooling water from the intake pipe 32 is supplied approximately uniformly to the entire second flow path group B1 (the entire plurality of second flow paths Bla) via the intake port 31a and the first flow path A1. It is supposed to be done. Then, heat is efficiently exchanged between the entire cooling water flowing through the entire second flow path group B1 and the CPU 101! /.
  • the cooling water flowing out from the plurality of second flow paths Bla is collected in the third flow path C1, and then discharged to the outside of the liquid cooling jacket J1 through the discharge port 31b and the discharge pipe 33. It is.
  • the intake pipe 32 is fixed to the lid body 31. Connected to the intake pipe 32 is a flexible tube 124 that leads to a micropump 122 (see FIG. 1) upstream of the liquid cooling jacket J1. Then, the cooling water from the micropump 122 is supplied to the first flow path A1 through the hollow portion of the intake pipe 32 and the intake port 31a.
  • the discharge nove 33 is fixed to the lid body 31. Connected to the discharge pipe 33 is a flexible tube 124 leading to a radiator 121 (see FIG. 1) on the downstream side of the liquid cooling jacket J1. The cooling water collected in the third flow path C1 is discharged to the outside of the liquid cooling jacket J1 through the discharge port 31b and the hollow portion of the discharge pipe 33.
  • the intake noise 32 and the discharge pipe 33 are fixed to the upper surface side of the lid body 31 in a standing state. Accordingly, the flexible tubes 124 and 124 can be connected to the intake pipe 32 and the discharge nozzle 33 only from the upper surface side of the liquid cooling jacket J1. That is, in the personal computer main body 120 with limited space (see FIG. 1), the flexible tubes 124 and 124 (see FIG. 1) connected to the liquid cooling jacket J1 can be easily routed.
  • the CPU 101 When the personal computer main unit 120 (Fig. 1) is turned on, the CPU 101 operates and begins to generate heat. Then, the heat of the CPU 101 is transmitted to the bottom wall 11 of the jacket body 10 via the thermal diffusion sheet 102, and further transmitted to the peripheral wall 21b and the partition wall 21c of each flat tube 21 that mainly forms the flat tube bundle 20.
  • the micropump 122 in conjunction with turning on the power source of the personal computer main body 120, the micropump 122 operates and the cooling water circulates. Then, in the liquid cooling jacket J1, the cooling water flows in the order of the first flow path Al, the second flow path group B1 (a plurality of second flow paths Bla), and the third flow path C1.
  • the cooling water received in each second flow path Bla is collected in the third flow path C1, and then discharged to the outside of the liquid cooling jacket J1 via the discharge port 3 lb and the discharge pipe 33.
  • the discharged cooling water is supplied to the radiator 121 through the flexible tube 124, and the heat of the cooling water is radiated from the radiator 121.
  • the cooling water whose temperature has decreased flows through the reserve tank 123 and the flexible tube 124 to the micro pump 122, and is then supplied again to the liquid cooling jacket J1.
  • the thermal power of the CPU 101 is distributed and transmitted to the peripheral walls 21b and the partition walls 21c of the plurality of flat tubes 21, and the heat of each of the peripheral walls 21b and the partition walls 21c is transmitted to the cooling water flowing through each second flow path Bla.
  • CPU101 can be cooled efficiently.
  • the cooling water supplied to the liquid cooling jacket J1 has a short channel length and mainly heat in the liquid cooling jacket J1 via the first channel A1 having a large channel cross-sectional area.
  • the plurality of second flow paths Bla second flow path group B1 to be exchanged
  • they are collected and discharged in the third flow path C1 having a large cross-sectional area of the flow path, so that the cooling water flows in the liquid cooling jacket J1.
  • the pressure loss received is getting smaller.
  • the micropump 122 can be reduced in size, and the application range of the liquid cooling system S1 is widened.
  • the manufacturing method of the liquid cooling jacket J1 mainly includes a first step of manufacturing the flat tube bundle 20 and a second step of joining and fixing the flat tube bundle 20 to the jacket body 10.
  • a plurality of flat tubes 21 are bundled while being joined by an appropriate means. Next, both ends of the bundle are cut and ground to prepare a flat tube bundle 20.
  • the flat tube bundle 20 at a predetermined position of the bottom wall 11 of the jacket body 10, with suitable means (A1- Si- brazing material and flux of Z n, etc.), heat exchangeably connected and fixed.
  • suitable means A1- Si- brazing material and flux of Z n, etc.
  • the lid body 31 with the intake pipe 32 and the discharge nozzle 33 fixed in place is joined and fixed to the jacket body 10 by an appropriate means. In this way, the liquid cooling jacket J1 can be obtained.
  • the intake pipe 32 and the discharge pipe 33 may be fixed to the lid body 31! /.
  • the flat tube bundle 20 is fixed to the jacket main body 10 as a plurality of flat tubes 21 and the lid main body 31 is fixed.
  • the liquid cooling jacket J1 can be obtained by a simple process of fixing.
  • FIG. 9 is an overall perspective view of the liquid cooling jacket according to the second embodiment, showing a state in which the lid unit is omitted.
  • FIG. 10 shows a YY cut of the liquid cooling jacket according to the second embodiment shown in FIG. FIG.
  • the liquid cooling jacket J2 according to the second embodiment includes a flat tube bundle 23 instead of the flat tube bundle 20 of the liquid cooling jacket J1 according to the first embodiment. It is characterized by.
  • the flat tube bundle 23 has the same external dimensions as the flat tube bundle 20 according to the first embodiment, a plurality of thin plate-like flat tubes 24 (three in FIGS. 9 and 10) can be bundled together. It consists of Each flat tube 24 has a plurality of (12 in FIG. 9 and FIG. 10) hollow portions 24a therein, and each hollow portion 24a serves as a second flow path B2a.
  • the flat tube bundle 23 has a second flow path group B2 composed of a plurality of second flow paths B2a.
  • each flat tube 24 has a thin plate shape
  • the number of hollow portions 24a formed therein (12 in FIG. 9) is formed in the flat tube 21 according to the first embodiment. More than the number (2) of the hollow portions 21a formed.
  • the number (three) of the flat tubes 24 constituting the flat tube bundle 23 is less than the number of the flat tubes 21 (see FIG. 7, 20) constituting the flat tube bundle 20 according to the first embodiment. That is, the flat tube bundle 23 according to the second embodiment can reduce the number of flat tubes 24 to be bundled (stacked) with respect to the flat tube bundle 20 according to the first embodiment, and can be configured easily without trouble. can do.
  • FIG. 11 is an overall perspective view of the liquid cooling jacket according to the third embodiment.
  • FIG. 12 is a plan view of a liquid cooling jacket according to the third embodiment.
  • the liquid cooling jacket J3 according to the third embodiment is formed at a position where the intake port 34a and the discharge port 34b are different from the liquid cooling jacket J1 according to the first embodiment.
  • a lid body 34 is provided.
  • the intake port 34a communicates with a substantially central position of the space 10a (first flow path A1), and cooling water is supplied to a substantially central position of the space 10a.
  • the discharge port 34b communicates with a substantially central position of the space 10c (third flow path), and this substantially central position force also discharges the cooling water.
  • the intake port 34a and the discharge port 34b are arranged symmetrically with respect to the CPU 101 in a plan view, and are arranged at positions approaching the CPU 101.
  • the lid body 34 also has a cutout 34c having a shape corresponding to the alignment portion 14 of the jacket body 10 in the same manner as the lid body 31 according to the first embodiment.
  • the cooling water power supplied from the intake port 34a to the first flow path A1 (space 10a) near the cooling hydraulic power CPU101 It becomes easy to distribute preferentially to 2 flow paths Bla. As a result, heat exchange can be suitably performed between the cooling water and the CPU 101, and the CPU 101 can be efficiently cooled.
  • FIG. 13 is an overall perspective view of the liquid cooling jacket according to the fourth embodiment, showing a state in which the lid unit is omitted.
  • FIG. 14 is a Z-Z sectional view of the liquid cooling jacket according to the fourth embodiment shown in FIG.
  • FIG. 15 is an enlarged view of the Z-Z sectional view shown in FIG.
  • FIG. 16 is a perspective view showing a first method for producing a fin member of a liquid cooling jacket according to the fourth embodiment, where (a) shows before cutting and (b) shows after cutting.
  • FIG. 17 is a perspective view showing a second method for producing the fin member of the liquid cooling jacket according to the fourth embodiment, where (a) shows before cutting and (b) shows after cutting.
  • FIG. 18 is a perspective view showing friction stir welding according to the fourth embodiment.
  • FIG. 19 is a cross-sectional view showing friction stir welding according to the fourth embodiment.
  • FIG. 20 is a plan view showing the movement of the tool in the friction stir welding according to the fourth embodiment.
  • the liquid cooling jacket J4 according to the fourth embodiment is replaced by a fin member 25 made of aluminum or aluminum alloy instead of the flat tube bundle 20 of the liquid cooling jacket J1 according to the first embodiment. It is provided with.
  • the jacket body 10 includes a fin housing chamber that houses the fin member 25 on the inner side thereof, and the fin housing chamber is surrounded by the peripheral wall 12.
  • the fin member 25 is fixed to the bottom wall 11 by brazing and is accommodated in the fin housing chamber, and the lid main body 31 (sealing body) covers the opening of the jacket main body 10 so as to accommodate the fin. Room Sealed (see Figure 14).
  • the fin member 25 includes a base plate 25a and a plurality of fins 25b erected on the base plate 25a.
  • the base plate 25a is joined and fixed to the bottom wall 11 of the jacket body 10 so as to allow heat exchange. Therefore, the heat is transmitted to the fins 25b via the heat and heat diffusion sheet 102 and the bottom wall 11 of the CPU 101. Further, the upper ends of the fins 25b are in contact with the back surface of the lid body 31.
  • the base plate 25a and the jacket main body 10 are preferably joined to each other by a brazing material having an aluminum alloying force such as A1-Si—Zn so that heat exchange can be ensured.
  • a space between adjacent fins 25b and 25b is a second flow path B3a.
  • the fin member 25 has a plurality of second flow paths B3a, that is, a second flow path group B3 including a plurality of second flow paths B3a.
  • the distance between adjacent fins 25b and 25b, that is, the groove width W1 that is the width of the second flow path B3a is designed to be 0.2-1. .
  • the thermal resistance of the liquid cooling jacket J4 and the pressure loss experienced by the cooling water passing through the liquid cooling jacket J4 can be in a favorable range as will be described in the examples described later.
  • the groove width W1 and the thickness Tl of the fin 25b that is, the thickness T1 of the fin 25b between the adjacent second flow paths B3a and B3a satisfy the relationship of the following equation (1). ing.
  • the thermal resistance of the liquid cooling jacket J4 is reduced, and heat can be exchanged favorably between the CPU 101 and the cooling water.
  • the groove width W1 and the depth D1 satisfy the relationship of the following equation (2). Thereby, the thermal resistance of the liquid cooling jacket J4 can be optimized.
  • the cooling water flows in the order of the first flow path Al, the second flow path group B3 (a plurality of second flow paths B3a), and the third flow path C1. Then, between the cooling water flowing through the second flow path group B3 and the plurality of fins 25b, Heat exchanged. As a result, the CPU 101 can be efficiently cooled.
  • a metal extrusion die 41 having a bottom plate 42 and a plurality of strips 43 standing on the bottom plate 42 is produced using a predetermined mold.
  • the fin member 25 provided with the base plate 25a (a part of the bottom plate 42) and a plurality of fins 25b (a part of the plurality of strips 43) is produced by cutting the extruded die 41 at a predetermined cut surface. (See Figure 16 (b)).
  • a second manufacturing method of the fin member 25 will be described with reference to FIG. 17 (a).
  • a plurality of grooves 44a are formed in a metal block 44 having a size corresponding to the outer shape of the fin member 25 using an appropriate cutting tool.
  • the fin member 25 including the base plate 25a and the plurality of fins 25b can be manufactured (see FIG. 17B).
  • the cover unit 30 is put on the jacket body 10 to which the fin member 25 is fixed by brazing, while aligning the notch portion 31c and the alignment portion 14.
  • the opening edge of the jacket body 10 is stepped, and the lid body 31 is placed on the stepped portion 15 that is lowered by one step.
  • the width W11 of the stepped portion 15 is set to be as small as possible, specifically about 0.1 to 0.5 mm, in order to secure the volume of the first flow path A1 and the third flow path C1 through which the cooling water flows. Is preferred.
  • the joint P1 between the peripheral wall 12 and the lid body 31 is friction stir welded using the tool 200 for friction stir welding.
  • the friction stir weld K See FIG. 15
  • the length L5 of the pin 201 of the tool 200 is preferably 60% or less of the thickness T2 of the lid body 31 that is the member to be joined. In this way, the force due to the material of the lid main body 31 allows the mating portion P1 of the jacket main body 10 to be adjusted by the pressing force of the tool 200 even if the width W11 of the stepped portion 15 is small. It becomes difficult to deform inside.
  • the tool 200 is controlled and rotated by a machine tool (not shown) such as an NC and is driven along the mating portion P1 (see FIG. 18).
  • a machine tool such as an NC
  • an appropriate jig 210 is applied to the peripheral surface of the peripheral wall 12 of the jacket body 10.
  • the distance L6 (gap) between the outer peripheral surface of the shono-redder 202 of the TUNORE 200 and the outer peripheral surface of the peripheral wall 12 is 2. Omm or less, for example, the pressing force of the tool 200 is thin. This makes it difficult for the peripheral wall 12 to be deformed outward.
  • the surface of the jig 210 is 1.0-2 with respect to the surface of the mating part P1. It is preferable to lower it by about Omm.
  • the tool 200 is moved so that the start end and the end end in the friction stir welding overlap (see symbol Q). Thereby, the jacket main body 10 and the lid main body 31 are joined without a gap, and the cooling water leaks to the outside.
  • the tool 200 is removed from the mating part P1, and the pin 201 is removed. As a result, it is not formed in the extraction force matching portion P1 of the pin 201.
  • FIG. 21 is a cross-sectional view of the liquid cooling jacket according to the fifth embodiment.
  • FIG. 22 is an enlarged view of the cross-sectional view shown in FIG.
  • FIG. 23 is a view showing a method for producing the fin member of the liquid cooling jacket according to the fifth embodiment, where (a) shows a state during skive processing and (b) shows a state after skive processing.
  • FIG. 24 is a view showing a method for producing the fin member of the liquid cooling jacket according to the fifth embodiment, and shows a state after removing a part of the skive fin shown in FIG. 23 (b).
  • FIG. 25 is a cross-sectional view showing friction stir welding according to the fifth embodiment.
  • the liquid cooling jacket J5 mainly includes a jacket body 10C and a fin member 29 made of aluminum or aluminum alloy, and the CPU 101 is a bottom wall of the fin member 29. It is configured to be attached to 29a (sealing body).
  • the jacket body 10C is a thin box having an opening on the lower side of FIG. 21 and having a fin housing chamber therein.
  • the fin member 29 is obtained by skiving one plate 61 (see FIG. 23 (a)), and includes a bottom wall 29a and a plurality of metal fins 29b. .
  • the plurality of fins 29b are erected on the bottom wall 29a, and are configured integrally with the bottom wall 29a. As a result, heat is transferred favorably between the bottom wall 29a and the fins 29b.
  • the bottom wall 29a functions as a sealing body for sealing the fin housing chamber. Further, the space between the adjacent fins 29b and 29b functions as the second flow path B4a (see FIG. 22).
  • the liquid cooling jacket J5 has a second flow path group B4 configured by a plurality of second flow paths B4a. In the state where the fin member 29 is attached to the jacket main body 10C, the first flow path A1 and the third flow path C1 are formed in the liquid cooling jacket J5 as in the fourth embodiment. (See Fig. 13).
  • the cooling water flows in the order of the first flow path A1 (see FIG. 13), the second flow path group B4 (a plurality of second flow paths B4a), and the third flow path C1 (see FIG. 13). Then, heat is mainly exchanged between the cooling water flowing through the second flow path group B4 and the plurality of fins 25b, and the CPU 101 can be efficiently cooled.
  • the bottom wall 29a and the fins 29b are integrally formed, the heat of the CPU 101 can be transferred well to the plurality of fins 29b, and as a result, heat can be dissipated well.
  • a plate-like plate 61 is skived as described in JP-A-2001-326308, JP-A-2001-352020, and the like.
  • the cutting tool 62 is cut at an acute angle to cut and raise a part of the plate 61 to form a plurality of skive fins 63. This is repeated a plurality of times to produce a skive intermediate 64 having a plurality of skive fins 63 (see FIG. 23 (b)).
  • the portion of the plate 61 that is not cut and raised serves as the bottom wall 29a (sealing body) of the fin member 29.
  • the production method of the fin member 29 is not limited to this, and the fin member 25 (see Fig. 16) after cutting the extruded die 41 according to the fourth embodiment or formed by grooving.
  • the fin member 25 may be configured by removing a part of the fin 25b.
  • the jacket main body 10C and the fin member 29 are combined, and the mating portion P2 is friction stir welded while applying the jig 210 in the same manner as in the fourth embodiment.
  • the length L5 of the pin 201 of the tool 200 is preferably 60% or less of the thickness T3 of the bottom wall 29a (sealing body) of the fin member 29 which is a member to be joined.
  • FIG. 26 is a cross-sectional view of the liquid cooling jacket according to the sixth embodiment, where (a) shows a completed state after assembly, and (b) shows before assembly.
  • the liquid cooling jacket J6 includes a jacket body 10A (first fin member), a lid, and a liquid cooling jacket J1 according to the first embodiment.
  • a unit 35 (second fin member) is provided.
  • the jacket main body 10A includes a bottom wall 11 (first base plate) and a plurality of fins 13 erected on the bottom wall 11 at a predetermined interval.
  • the lid unit 35 is separated from the lid body 36 (second base plate) and the lid body 36 by a predetermined distance. It is provided with a plurality of standing fins 37.
  • the jacket body 10A and the lid unit 35 are combined so that the plurality of fins 13 and the plurality of fins 37 are held together, and the lid body 36 is joined and fixed to the jacket body 10A. Yes.
  • the entire fin of the liquid cooling jacket J6 is composed of a plurality of fins 13 and a plurality of fins 37 which are entangled.
  • the space between adjacent fins 13 and fins 37 is a second flow path B5a, and the liquid cooling jacket J6 has a second flow path group B5 including a plurality of second flow paths B5a.
  • the protruding length L1 of the plurality of fins 13 from the bottom wall 11 is set to be the same as or shorter than the protruding length L2 of the plurality of fins 37 from the lid body 36, as shown in Fig. 26 (b). ing.
  • the plurality of fins 37 and the bottom wall 11 are joined and fixed so as to be capable of heat exchange by an appropriate means, and are thermally connected. As a result, the thermal power of the CCU 101 on the jacket body 10A side (first base plate side) is also transmitted to the plurality of fins 37 connected by the plurality of fins 13 alone.
  • the protruding length L1 of the plurality of fins 13 is set to be the same as or shorter than the protruding length L2 of the plurality of fins 37, when the jacket body 10A and the lid unit 35 are assembled, the plurality of fins 37
  • the tip (top) reliably contacts the bottom wall 11 of the jacket body 10A, and the plurality of fins 37 and the bottom wall 11 can be reliably thermally connected.
  • FIG. 27 is a cross-sectional view of the liquid cooling jacket according to the seventh embodiment.
  • (A) is a completed state after assembly.
  • the state, (b) shows before assembly.
  • the liquid cooling jacket J7 according to the seventh embodiment is replaced with a plurality of flat tube bundles 20 of the liquid cooling jacket J1 according to the first embodiment.
  • a metal Hercam body 26 having a pore 26a is provided.
  • the two-cam body 26 is joined and fixed to the bottom wall 11 of the jacket body 10 by an appropriate means so that heat exchange is possible. Therefore, the heat of the CPU 101 is transmitted to the peripheral wall 26b surrounding the pore 26a.
  • Each pore 26a functions as a second flow path B6a through which cooling water flows. That is, the two-cam body 26 has a second flow path group B6 including a plurality of second flow paths B6a.
  • the shape of the force hole 26a exemplifying the hermetic body 26 having the narrow hole 26a having a rectangular cross-sectional view is not limited to this, and may be a hexagon or the like. May be. Further, it is preferable that the her cam body 26 and the bottom wall 11 of the jacket main body 10 are joined to each other by a brazing material so that heat exchange can be surely performed.
  • the cooling water flows in the order of the first channel Al, the second channel group B6 (a plurality of second channels B6a), and the third channel C1. Then, heat is mainly exchanged between the peripheral wall 26b of the honeycomb body 26 and the cooling water flowing through the second flow path B5a, so that the heat of the peripheral wall 26b is transferred to the cooling water. As a result, the CPU 101 is efficiently cooled.
  • FIG. 28 is a cross-sectional view of the liquid cooling jacket according to the eighth embodiment, where (a) shows a completed state after assembly, and (b) shows before assembly.
  • the liquid cooling jacket J8 according to the eighth embodiment has a cross-section instead of the flat tube bundle 20 of the liquid cooling jacket J1 according to the first embodiment. It is equipped with a corrugated metal heat exchange sheet 27 (brazing sheet). [0125] ⁇ Heat exchange sheet>
  • the heat exchange sheet 27 is composed of a sheet body 27a formed of an aluminum alloy such as Al-Mn or Al-Fe-Mn, and a solder formed from an aluminum alloy such as A1-Si-Zn on the lower surface side. Material layer 27b.
  • the heat exchange sheet 27 is bonded and fixed to the bottom wall 11 of the jacket main body 10 so as to allow heat exchange by partially melting and hardening the brazing material layer 27b. Therefore, the heat of the CPU 101 is transferred to the heat exchange sheet 27 through the bottom wall 11.
  • a plurality of second flow paths B7a are formed between the heat exchange sheet 27 and the jacket body 10 or the lid body 31. That is, the liquid cooling jacket J8 has a second channel group B7 including a plurality of second channels B7a.
  • the cooling water flows in the order of the first flow path Al, the second flow path group B7 (a plurality of second flow paths B7a), and the third flow path C1. Then, heat is exchanged between the heat exchange sheet 27 and the cooling water flowing through the second flow path B7a, so that the heat of the heat exchange sheet 27 is transferred to the cooling water. As a result, the CPU 101 is efficiently cooled.
  • FIG. 29 is a plan view of the liquid cooling jacket according to the ninth embodiment.
  • the lid body is removed for easy understanding.
  • the liquid cooling jacket J9 according to the ninth embodiment includes one flat tube bundle 20 but includes three flat tube bundles 20 in the liquid cooling jacket J1 according to the first embodiment.
  • the three flat tube bundles 20 are arranged in a line in the jacket body 10B so that the hollow portions 21a (second flow paths Bla) of the flat tube bundles 20 are in the same direction.
  • the three flat tube bundles 20 have a space 10d between the upstream flat tube bundle 20 and the midstream flat tube bundle 20 in the jacket main body 10B, and between the midstream flat tube bundle 20 and the downstream flat tube bundle 20. With 10 d installed, they can contact the bottom wall 11 of the jacket body 10B so that they can exchange heat. Go-Fixed.
  • the spaces 10d and 10d function as fourth flow paths El and El (connection flow paths) that connect the second flow path group B1 of the flat tube bundle 20 in series.
  • the channel cross-sectional area of the fourth channel E1 is set larger than the channel cross-sectional area of the second channel Bla constituting each second channel group B1. That is, the liquid cooling jacket J9 has three second flow path groups Bl, Bl, B1 (second flow path group portions) arranged in series.
  • Cooling water is the first channel Al, the second channel group Bl upstream, the fourth channel El, the second channel group B 1 in the middle stream, the fourth channel El, the second channel group Bl downstream, Circulates in the order of the third flow path C1. That is, the cooling water flows in series through the three second flow path groups Bl, Bl, B1. Here, since the cooling water passes through the fourth flow path E1 between the adjacent second flow path groups Bl and B1, the pressure loss received by the cooling water in the fourth flow path E1 is reduced. .
  • the load acting on the micropump 122 can be reduced by / J.
  • FIG. 30 is a plan view of a liquid cooling jacket according to the tenth embodiment.
  • FIG. 31 is a graph showing the relationship between the number of turns and the thermal resistance.
  • the liquid cooling jacket J10 according to the tenth embodiment is similar to the liquid cooling jacket J9 according to the ninth embodiment.
  • Bl, B1 second flow path group
  • the second flow path groups Bl, B1 adjacent to each other in the flow direction of the cooling water pass through the fourth flow path E1 (connection flow path). Connected in series.
  • the adjacent second flow path groups Bl and B1 are arranged side by side, and among the adjacent second flow path groups B1, the downstream end of the upstream one and the downstream side The upstream end of the one is disposed on the same side, and the downstream end and the upstream end are connected in series via the fourth flow path E1.
  • the second flow path group B1 at the upstream position and the middle The second flow path group Bl at the flow position is adjacent in the flow direction of the cooling water and is juxtaposed in the horizontal direction of FIG.
  • the downstream end of the second flow path group B1 at the upstream position and the upstream end of the second flow path group B1 at the midstream position face the lower side in FIG. 30, which is the same side.
  • the cooling water meanders and flows through the inside thereof. Then, the thermal resistance of the liquid cooling jacket J10 is less than the uncooled liquid cooling jacket I, J9 / J.
  • the type of the heat generating body is not limited to this, and may be, for example, a power module, an LED lamp, or the like.
  • the flat tube bundle 20 is configured by bundling a plurality of flat tubes 21 in the thickness direction, but may be configured by further bundling in the width direction.
  • the liquid cooling jacket J1 according to the first embodiment has been described with respect to the case where the flat tube bundle 20 is provided by bundling a plurality of flat tubes 21 (see Fig. 6).
  • a liquid cooling jacket J11 provided with a flat tube 28 having a plurality of hollow portions 28a partitioned by a plurality of partition walls may be used.
  • each hollow The portion 28a functions as the second flow path B8a
  • the flat tube 28 has a second flow path group B8 including a plurality of second flow paths B8a.
  • the positions of the force intake port 31a and the discharge port 31b described in the case where the intake port 31a and the discharge port 31b are formed in the lid body 31 are as follows.
  • it may be formed on the peripheral wall 12 of the jacket body 10.
  • the positions of the intake pipe 32 and the discharge pipe 33 are not limited to the upper surface side of the liquid cooling jacket J1, but may be positioned on the side surface side.
  • the liquid cooling jacket J12 may include a base plate 56 and a second fin member 55 including a plurality of second fins 57 provided on the second base plate 56.
  • the liquid cooling jacket J12 shown in Fig. 33 will be further described.
  • the first fin member 50 and the second fin member 55 are configured such that the plurality of first fins 52 and the plurality of second fins 57 are intermingled.
  • the whole of the plurality of metal fins in the liquid cooling jacket J12 is composed of a plurality of first fins 52 and a plurality of second fins 57.
  • a second flow path B9a is formed between the two fins 57.
  • the first fin member 50 is located on the CPU 101 side, and the first base plate 51 is fixed to the bottom wall 11 of the jacket body 10 so as to allow heat exchange.
  • the liquid cooling jacket J12 has a second flow path group B9 including a plurality of second flow paths B9a.
  • the protruding length L3 of the plurality of first fins 52 from the first base plate 51 is set to be the same as or shorter than the protruding length L4 of the plurality of second fins 57 from the second base plate 56.
  • the plurality of second fins 57 and the first base plate 51 are joined and fixed so as to be capable of heat exchange by an appropriate means, and are thermally connected.
  • the first flow path Al and the third flow path C1 are formed by providing the spaces 10a and 10c between the jacket body 10 and the flat tube bundle 20, respectively ( (Refer to Fig. 5)
  • the spaces 10a and 10c are not provided, but outside the jacket body 10
  • a branch pipe may be provided on the upstream side of this, the hollow part may be used as the first flow path, and the collecting pipe may be provided on the downstream side, and the hollow part may be used as the third flow path.
  • the fin member 25 is fixed to the jacket body 10.
  • a liquid cooling jacket J13 in which the fin member 25 is fixed to the side surface of the jacket body 10 may be used.
  • the CPU 101 may be attached to the lid body 31.
  • a configuration may be adopted in which the intake pipe 32 serving as the cooling water intake port into the liquid cooling jacket J13, the discharge pipe 33 serving as the discharge port, and the force jacket body 10 are attached.
  • the fin body is integrally formed on the side surface of the jacket body 10 of the lid body 31.
  • the jacket body 10 is provided with four legs 16 having through holes 16a, and screws 125 are passed through the through holes 16a.
  • the removal position of the tool 200 is preferably a portion corresponding to the through hole 16a. Then, after pulling out the tool 200 at such a position, the trace of the tool 200 can be hidden by forming the through hole 16a in the trace part.
  • the groove width W1 (see Fig. 15) of the second flow path B3a is 0.2mm, 0.5mm, 1. Omm. Was made.
  • Table 1 shows the specifications of the liquid cooling jacket J4.
  • the overall channel width W0 is the width of the first channel A1 and the third channel C1.
  • the overall flow path length L0 is the sum of the length of the first flow path A1, the length of the second flow path B3a, and the length of the third flow path C1 (see FIGS. 13 and 14).
  • the micropump 122 (see Fig. 1) is operated so that this water flows at 5 (LZmin) (see Table 2), and the groove width of the second flow path B3a
  • LZmin 5
  • Table 2 5
  • W1 and pressure loss of liquid-cooled jacket J4 were measured by appropriate methods.
  • the target thermal resistance was set to 0.008 (° CZW) or less.
  • the groove width W1 of the second flow path B3a is preferably 0.2 to 1.1 mm.
  • the groove width W1 of the second flow path B3a is set to three types of 0.2 mm, 0.5 mm, and 1. Omm (see Table 1). Thickness of fin 25b against groove width Wl
  • the groove width W1 of the second flow path B3a is 0.5 mm
  • the range is 0.7 ⁇ T 1 / W1 ⁇ 2.1.
  • the groove width Wl of the second flow path B3a is 0.2 mm, 0.8 ⁇ T1 / Wl ⁇ 2.9.
  • the groove width W1 of the second flow path B3a is set to three types of 0.2 mm, 0.5 mm, and 1. Omm (see Table 1).
  • the depth D1 was appropriately changed with respect to the groove width W1 of the two flow paths B3a, and the relationship between “depth Dl” and “thermal resistance” was examined.
  • each groove width W1 had a range of groove depth D1 in which the thermal resistance was reduced. Then, in the same manner as in Example 2, when this range is obtained, 2 ⁇ D1 ⁇ 6 when the groove width W1 is 0.2 mm, 4 ⁇ D2 ⁇ 11 when the groove width W1 is 0.5 mm, and the groove width Wl is 1. For Omm, 6 ⁇ D1 ⁇ 18.
  • the rotation speed of the tool 200 was 6000 rpm, and the joining speed was 200 mmZmin.
  • the thickness T11 of the peripheral wall 12 (see Fig. 19) was 4 mm.
  • the lid body 31 can be satisfactorily bonded without deforming the peripheral wall 12 even when the distance L6 where the peripheral wall 12 is thin is 0.5 mm. confirmed.
  • the length L5 of the pin 201 is 6 of the thickness T2 of the lid body 31 that is the member to be joined. In the range of 0.0% or less, it was confirmed that the peripheral wall 12 and the lid body 31 can be joined well.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne une chemise à refroidissement liquide (J1) capable de refroidir efficacement un corps générateur de chaleur tel qu'une unité centrale (UC). L'UC (101) est installée à un endroit prescrit, et une chaleur générée par l'UC (101) est transmise à une eau de refroidissement fournie par un moyen d'alimentation en fluide caloporteur à l'extérieur et circulant dans ladite chemise à refroidissement liquide. La chemise à refroidissement liquide (J1) comprend un premier passage d'écoulement (A1) sur le côté du moyen d'alimentation en fluide caloporteur, un groupe de deuxièmes passages d'écoulement (B1) formé d'une pluralité de deuxièmes passages d'écoulement (B1a) ramifiés à partir du premier passage d'écoulement (A1), et un troisième passage d'écoulement (C1) formé par la convergence de la pluralité de deuxièmes passages d'écoulement (B1a) sur le côté aval de la pluralité de deuxièmes passages d'écoulement (B1a). L'UC (101) utilise la chemise à refroidissement liquide (J1) échangeant de la chaleur principalement dans le groupe de deuxièmes passages d'écoulement (B1).
PCT/JP2006/307846 2005-04-21 2006-04-13 Chemise a refroidissement liquide Ceased WO2006115073A1 (fr)

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Application Number Priority Date Filing Date Title
US11/918,876 US20090065178A1 (en) 2005-04-21 2006-04-13 Liquid cooling jacket

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Application Number Priority Date Filing Date Title
JP2005-123403 2005-04-21
JP2005123403 2005-04-21

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Publication Number Publication Date
WO2006115073A1 true WO2006115073A1 (fr) 2006-11-02

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