JP2005274120A - Liquid cooling plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid cooling type cooling plate having a high flatness of a cooling surface on which a body to be cooled is attached and high strength, and can be easily manufactured.
A cooling plate (1) includes at least one flat porous tube (20), a substrate (10), and a lid plate (30). On the surface of the substrate 10, there are provided two header portion forming recesses 11a and 11b that are spaced apart from each other and a tube storage recess 12 that is formed between the header portion forming recesses and that stores the tube 20. . A body to be cooled is attached to the front surface of the cover plate 30 and / or the back surface of the substrate 10. The tube 20 is accommodated in the tube accommodating recess 12. The tube 20 is sandwiched between the substrate 10 and the cover plate 30 in a state where the cover plate 30 is superposed on the surface of the substrate 10. Furthermore, the two header portions 14a and 14b are formed by closing the openings of the header portion forming recesses 11a and 11b with the cover plate 30. The substrate 10, the tube 20, and the cover plate 30 are joined and integrated with each other.
[Selection] Figure 7

Description

  The present invention relates to a liquid cooling type cooling plate, a manufacturing method thereof, and an electric vehicle equipped with the cooling plate.

  In the claims and the specification, the term “electric vehicle” is used to include a hybrid vehicle. Examples of the vehicle include an automobile, a motorcycle, and a railway vehicle.

  Since electronic parts such as semiconductor devices, multichip modules, and printed circuit boards generate heat during use, they are conventionally attached to an air-cooled cooling plate and cooled. However, in recent years, as the performance of electronic components improves, the amount of heat generated from the electronic components increases, and the air-cooled cooling plate cannot obtain the cooling capacity necessary for cooling the electronic components. Therefore, a liquid (water) cooling type cooling plate has been used instead of the air cooling type cooling plate.

  As a liquid-cooling type cooling plate, for example, Japanese Patent Laid-Open No. 2002-170915 discloses a case in which an inner fin is housed in a casing (see Patent Document 1), and Japanese Patent Laid-Open No. 10-98144. Is disclosed in which both outer plates are fastened to each other by bolts and nuts in a state where a tube through which a coolant flows is sandwiched between two outer plates (see Patent Document 2).

In both liquid cooling type cooling plates, in the former cooling plate, the surface of the cover plate that closes the opening of the casing is a cooling surface, and electronic parts are attached to the cooling surface to cool the object to be cooled. Is done. In the latter cooling plate, the surface of each outer plate is a cooling surface, and an electronic component is attached to the cooling surface to cool the electronic component.
JP 2002-170915 A (Claim 1, FIGS. 1-4) JP-A-10-98144 (Claim 1, FIG. 1-2)

  Thus, in the former cooling plate, an inner fin is used to form a coolant passage inside the casing. The dimension of the coolant passage that can be formed by this inner fin is generally about 1 mm in height. And about 1 mm or more in width. In order to form a coolant passage smaller than this size with the inner fins, the pitch of the inner fins must be set very small, making it difficult to manufacture the inner fins.

  In the latter cooling plate, when the outer plates are fastened with bolts and nuts, the outer plates may be bent by the fastening force, which may reduce the flatness of the cooling surface of the outer plate. If the flatness of the cooling surface is lowered, a gap is generated between the cooling surface and the electronic component in a state where the electronic component is attached to the cooling surface, and as a result, the cooling efficiency is reduced. A problem occurs. In addition, the tube may be deformed when fastened with a bolt-nut, and as a result, the coolant passage of the tube is unintentionally narrowed or even blocked.

  The present invention has been made in view of the above-described technical background, and its purpose is to have a high flatness of a cooling surface on which a body to be cooled such as an electronic component is mounted, high strength, and easy manufacture. An object of the present invention is to provide a liquid-cooled cooling plate that can be used, a manufacturing method thereof, and an electric vehicle equipped with the cooling plate.

  The present invention provides the following means.

  [1] At least one flat porous tube through which the coolant flows, and two header portion forming recesses spaced apart from each other and the header portion forming recesses on the surface and containing the tube A substrate provided with a tube housing recess, and a lid plate that is polymerized on the surface of the substrate, and a body to be cooled is attached to the surface of the lid plate and / or the back surface of the substrate. And the tube is accommodated in the tube accommodating recess in a form communicating with both the header portion forming recesses, and the tube is superposed on the surface of the substrate, and the tube is connected to the substrate and the substrate. While sandwiched between the lid plate, the opening portions of the two header portion forming recesses are closed by the lid plate to form two header portions, the substrate, the tube, and the lid plate, Fit in the header Liquid-cooling type cooling plate, characterized in that it is integrally joined to the state to prevent leakage of the cooling liquid to be.

  [2] The liquid cooling type cooling plate according to the above item 1, wherein the substrate, the tube, and the lid plate are joined and integrated by brazing.

  [3] The liquid-cooled cooling plate according to the above item 1 or 2, wherein the tube is an extruded tube.

  [4] The liquid-cooled cooling plate according to 1 or 2 above, wherein the tube is a rolled tube.

  [5] The liquid-cooled cooling plate according to any one of the preceding items 1 to 4, wherein an average equivalent diameter of the coolant passage of the tube is set in a range of 0.05 to 1.7 mm.

  [6] A first connection port member connected to the coolant inflow pipe is connected to one of the two header parts, and a second connection port member connected to the coolant outflow pipe is provided. 6. The liquid cooling type cooling plate according to any one of the preceding items 1 to 5, which is connected to the other header portion.

  [7] The liquid-cooled cooling plate according to any one of items 1 to 6, wherein the object to be cooled is an electronic component for an electric vehicle.

  [8] The liquid-cooled cooling plate according to any one of items 1 to 6, wherein the object to be cooled is an electronic component for a computer.

  [9] At least one flat porous tube through which the coolant flows, and two header portion forming recesses spaced apart from each other and the header portion forming recesses formed on the surface and containing the tube A step of preparing a substrate provided with a tube housing recess, and a lid plate to be polymerized on the surface of the substrate; and the tube is communicated with the header forming recesses in the tube housing recess. The tube is housed between the substrate and the lid plate by superposing the lid plate on the surface of the substrate after the tube housing step and the tube housing step. The substrate and the tube are formed after the overlapping process of the cover plate, and the overlapping process of the cover plate, wherein the opening portions of the header forming recesses are closed with the cover plate to form two header portions. And the lid plate The integrally bonding state to prevent leakage of the cooling liquid to be contained in the header portion, the joining process and the comprise liquid cooled method for manufacturing a cooling plate, characterized in that are.

  [10] The method for manufacturing a liquid-cooled cooling plate as recited in the aforementioned Item 9, wherein in the joining step, the substrate, the tube, and the lid plate are joined and integrated together by brazing in a furnace.

  [11] Further, a first connection port member connected to the coolant inflow pipe is connected to one of the two recesses for forming the tank part, and is connected to the coolant outflow pipe. A connecting port member connecting step, wherein the substrate, the tube, the lid plate, and the two connecting port members are collectively bonded by in-furnace brazing. 10. The method for producing a liquid-cooled cooling plate as described in 9 above, which is integrated.

  [12] The method for producing a liquid-cooled cooling plate according to any one of items 9 to 11, wherein the tube is an extruded tube.

  [13] The method for manufacturing a liquid-cooled cooling plate according to any one of items 9 to 11, wherein the tube is a rolled tube.

  [14] The method for producing a liquid-cooled cooling plate according to any one of items 9 to 13, wherein an average equivalent diameter of the coolant passage of the tube is set in a range of 0.05 to 1.7 mm.

[15] The liquid-cooled cooling plate according to any one of items 1 to 7 is mounted,
An electric vehicle, wherein an electronic component is attached as an object to be cooled to the front surface of the cover plate of the cooling plate and / or the back surface of the substrate.

  [16] The electricity according to item 15 above, wherein a radiator is mounted, the coolant cooled by the radiator flows into the cooling plate, and the coolant flowing out from the cooling plate is cooled by the radiator. vehicle.

  Next, the invention of each of the above items will be described below.

  In the invention of [1], since the porous tube is used as a member through which the coolant flows, a cooling plate having a small coolant passage can be easily manufactured. Therefore, it is possible to provide a cooling plate that can exhibit a high cooling capacity.

  In this cooling plate, the object to be cooled is attached to the front surface of the lid plate and / or the back surface of the substrate to be cooled. That is, the front surface of the lid plate and / or the back surface of the substrate acts as a cooling surface of the cooling plate.

  Further, when the substrate, the tube, and the lid plate are joined, the tube is accommodated in a predetermined concave portion of the substrate, so that the flatness of the cooling surface (that is, the front surface of the lid plate and / or the back surface of the substrate) accompanying the joining. Can be prevented. Therefore, the flatness of the cooling surface can be kept high. Therefore, the object to be cooled can be attached in close contact with the cooling surface, and the object to be cooled can be efficiently cooled.

  Furthermore, since the tube is accommodated in the recess of the substrate, there is no possibility that the tube is deformed when the substrate, the tube, and the cover plate are joined. Therefore, the coolant passage of the tube can be held in a predetermined shape and size.

  Further, the tube is accommodated in the recess of the substrate, and the substrate, the tube, and the cover plate are joined and integrated in a state where the cover plate is superposed on the surface of the substrate. Has strength.

  In the present invention, the type of the object to be cooled that is cooled by the cooling plate is not limited. Semiconductor devices, multichip modules, printed circuit boards, IGBT modules, inverters, converters, semiconductor control elements, diodes, capacitors, coils, light-emitting components (eg lamps), speakers, CRTs, hard disk drives, DVD drives, Examples include printer parts (eg, thermal head).

  In the present invention, the materials of the substrate, the cover plate, and the tube are not limited. Examples of the material include aluminum or aluminum alloy, copper or copper alloy, iron, steel, stainless steel, resin, ceramic, etc. In particular, the material is aluminum or aluminum alloy, copper or copper alloy, and high thermal conductivity. Therefore, it is desirable in that the cooling capacity can be improved.

  In the present invention, brazing is mentioned as a joining means between the substrate, the tube, and the cover plate as described later, but other examples include friction stir welding, solder joining, heat diffusion joining, and an adhesive.

  In the invention [2], since the substrate, the tube, and the cover plate are joined and integrated by brazing, the thermal conductivity is good, and therefore the cooling capacity can be improved.

  In the invention of [3], since the tube is an extruded tube, a cooling plate having a smaller coolant passage can be easily manufactured.

  Note that the extruded tube is a tube formed by extrusion.

  In the invention of [4], since the tube is a rolled tube, a cooling plate having a smaller coolant passage can be easily manufactured.

  The rolled tube is a tube formed by rolling. Specifically, as a rolled tube, as disclosed in, for example, Japanese Patent No. 2915660 (Japanese Patent Laid-Open No. 5-164484), a plate-shaped material is formed by a roller having a plurality of annularly formed concave portions on the peripheral surface. The plurality of ridges protruding into the forming recess of the roll as a result of the thinning are used as partition ribs for the coolant passage, and then the material is formed into a cylindrical shape by a roll forming machine. The formed tube is mentioned.

  In the invention of [5], the cooling capacity of the cooling plate can be improved by setting the average equivalent diameter of the cooling liquid passage of the tube in the range of 0.05 to 1.7 mm.

  Here, the equivalent diameter is a value obtained by dividing four times the cross-sectional area of the coolant passage by the wet circumference (wetting spot length). That is, de = 4 A / p where de is the equivalent diameter, A is the cross-sectional area of the coolant passage, and p is the wetting circumference.

  In the invention of [6], since the cooling plate includes the first connecting port member connected to the cooling liquid inflow pipe and the second connecting port member connected to the cooling liquid outflow pipe, the cooling liquid inflow pipe In addition, it is possible to easily connect the cooling liquid outlet pipe to the cooling plate.

  In the invention of [7], it is possible to provide a cooling plate capable of reliably cooling electronic components for electric vehicles.

  Examples of electronic components for electric vehicles include IGBT modules, inverters, converters, semiconductor control elements, diodes, capacitors, coils, and light emitting components.

  In the invention of [8], it is possible to provide a cooling plate capable of reliably cooling electronic components for computers.

  Examples of computer electronic components include a CPU, MPU, hard disk drive, DVD drive, and the like.

  In the invention of [9], the manufacturing method of the cooling plate includes a tube, a substrate and a lid plate preparation step, a tube accommodation step, a lid plate polymerization step, and a joining step. Such a cooling plate can be reliably and easily manufactured.

  In the invention of [10], in the joining step, the substrate, the tube, and the cover plate are joined and integrated together by brazing in the furnace, so that the cooling plate can be manufactured more easily.

  In the invention of [11], the manufacturing method of the cooling plate includes a connecting step of both connecting port members, and in the joining step, the substrate, the cover plate, the tube, and both connecting port members are bundled together by in-furnace brazing. Therefore, the cooling plate can be manufactured more easily.

  In the invention of [12], since the tube is an extruded tube, a cooling plate having a smaller coolant passage can be easily manufactured.

  In the invention of [13], since the tube is a rolled tube, a cooling plate having a smaller coolant passage can be easily manufactured.

  In the invention of [14], the cooling capacity of the cooling plate can be improved by setting the average equivalent diameter of the cooling liquid passage of the tube in the range of 0.05 to 1.7 mm.

  In the invention of [15], since the cooling plate according to the present invention is mounted and an electronic component is attached as a body to be cooled on the surface of the lid plate of the cooling plate and / or the back surface of the substrate, the electronic component for an electric vehicle Can be reliably cooled.

  In the invention of [16], the coolant cooled by the radiator mounted on the electric vehicle flows into the cooling plate, and the coolant flowing out from the cooling plate is cooled by the radiator. Will circulate through the cooling plate and the radiator. Therefore, the electronic component can be further reliably cooled.

  The present invention has the following effects.

  According to the invention of [1], a liquid cooling type cooling plate having a small cooling liquid passage can be easily manufactured. Therefore, it is possible to provide a liquid cooling type cooling plate that can exhibit a high cooling capacity.

  Furthermore, the flatness of the cooling surface of the cooling plate (that is, the front surface of the cover plate and / or the back surface of the substrate) can be kept high. Therefore, the object to be cooled can be efficiently cooled.

  Further, since the tube is accommodated in the concave portion of the substrate, there is no possibility that the tube is deformed when the substrate and the cover plate are joined and integrated, so that the coolant passage of the tube can be held.

  Further, the tube is accommodated in the recess of the substrate, and the substrate, the tube, and the cover plate are joined and integrated in a state where the cover plate is superposed on the surface of the substrate. Has strength.

  According to the invention of [2], the cooling capacity of the cooling plate can be improved.

  According to the invention of [3], it is possible to easily manufacture a cooling plate having a smaller coolant passage.

  According to the invention of [4], a cooling plate having a smaller coolant passage can be easily manufactured.

  According to the invention of [5], the cooling capacity of the cooling plate can be improved.

  According to the invention of [6], it is possible to easily connect the coolant inlet pipe and the coolant outlet pipe to the cooling plate.

  According to the invention of [7], it is possible to provide a cooling plate capable of reliably cooling electronic components for electric vehicles.

  According to the invention of [8], it is possible to provide a cooling plate capable of reliably cooling electronic components for computers.

  According to the invention of [9], the liquid cooling type cooling plate according to the present invention can be reliably and easily manufactured.

  According to the invention [10], the cooling plate can be more easily manufactured.

  According to the invention of [11], the cooling plate can be more easily manufactured.

  According to the invention of [12], a cooling plate having a smaller coolant passage can be easily manufactured.

  According to the invention of [13], a cooling plate having a smaller coolant passage can be easily manufactured.

  According to the invention of [14], the cooling capacity of the cooling plate can be improved.

  According to the invention of [15], the electronic component for an electric vehicle can be reliably cooled.

  According to the invention of [16], the electronic component can be further reliably cooled.

  Next, some preferred embodiments of the present invention will be described below.

  In FIG. 1, (1) is a liquid cooling type cooling plate which concerns on one Embodiment of this invention. This cooling plate (1) is called a cold plate. In the cooling plate (1), pure water, antifreeze, or the like is used as the cooling liquid.

  As shown in FIG. 9, the cooling plate (1) is mounted on an electric vehicle (including a hybrid vehicle, the same applies hereinafter) (40) as an electric vehicle.

  In FIG. 1, (2) is an object to be cooled that is cooled by the cooling plate (1). In this embodiment, this to-be-cooled body (2) is an electronic component for an electric vehicle (40). Examples of the electronic component for an electric vehicle include an IGBT module, an inverter, a converter, a semiconductor control element, a diode, a capacitor, a coil, and a light emitting component. Such an electronic component is required to have high reliability over a long period of operation. Therefore, it is necessary to reliably cool the electronic component. The IGBT module is a switching element for power conversion, and the inverter is for converting a direct current of the battery into an alternating current for driving the motor.

  As shown in FIG. 7, the cooling plate (1) includes a substrate (10), a lid plate (30), and a plurality (seven in this figure) of flat perforated tubes (20 in the figure). ), A first connection port member (18a), and a second connection port member (18b).

  The substrate (10), the cover plate (30), the tube (20), and both connection port members (18a) (18b) are all made of metal, and more specifically, made of aluminum or aluminum alloy.

  A brazing material is coated on the surface and side surfaces of the substrate (10). Similarly, at least the back surface of the cover plate (30), the outer peripheral surface of the tube (20), and the outer peripheral surfaces of the connecting port members (18a) (18b) are each coated with a brazing material. In the present invention, the brazing material may be clad at a predetermined site, and the lid plate (30) may be a brazing sheet.

  As shown in FIG. 7, the surface of the substrate (10) is formed in a quadrangular shape (in detail, a rectangular shape). In addition, two bed forming recesses (11a) and (11b) spaced in parallel to each other are provided on the left and right sides of the center portion of the surface of the substrate (10). A tube housing recess (12) for housing the tube (20) is provided between the header forming recesses (11a) and (11b) on the surface.

  The cross-sectional shape of each of the header portion forming recesses (11a) and (11b) is a substantially square shape (specifically, a rectangular shape). The depth of the tube housing recess (12) is set to be approximately the same as the thickness of the tube (20). In addition, the depth of each of the bed portion forming recesses (11a) and (11b) is set deeper than the depth of the tube housing recess (12).

  Here, for convenience of explanation, one of the two header portion forming recesses (11a) and (11b) is referred to as a “first header portion forming recess (11a)”, and the other is referred to as a “second header portion forming recess”. This is referred to as “recess (11b)”.

  The shape and size of the back surface of the cover plate (30) are set to be the same as the shape and size of the surface of the substrate (10). Therefore, the cover plate (30) is in the state of being polymerized on the surface of the substrate (10), and the openings of the header forming recesses (11a) (11b) provided on the surface of the substrate (10) and the tube storage The opening of the recess (12) can be closed.

  A body to be cooled (2) is attached to the surface of the cover plate (30) as shown in FIG. That is, in the cooling plate (1) of the present embodiment, the surface of the lid plate (30) acts as the cooling surface (1A). The cooling surface (1A) (that is, the surface) of the cover plate (30) is formed flat. Similarly, the back surface of the lid plate (30) is formed flat.

  The thickness of the cover plate (30) is set smaller than the thickness of the substrate (10). In the present invention, the thickness of the lid plate (30) is preferably set in the range of 0.5 to 5 mm (particularly preferably 1 to 3 mm).

  Each tube (20) has a plurality of coolant passages (21). Each coolant passage (21) consists of a fine through-hole penetrating the tube (20). The cross-sectional shape of each coolant passage (21) is a quadrangular shape (in detail, a rectangular shape) as shown in FIG.

  In the present invention, the cross-sectional shape of each coolant passage (21) may be a substantially circular shape, a substantially elliptical shape, a substantially star shape, a polygonal shape, or the like.

  In this tube (20), a desirable range for the average equivalent diameter of the coolant passage (21) will be described later.

  The tube (20) is a tube formed by extrusion, that is, an extruded tube, or a tube formed by rolling, that is, a rolled tube. Such extruded tubes and rolled tubes are generally used in heat exchangers.

  In the present embodiment, the plurality of coolant passages (21) of the tube (20) are formed of mutually independent holes. However, in the present invention, the plurality of coolant passages (21) of the tube (20) may communicate with each other.

  As shown in FIG. 9, the first connection port member (18a) is connected to the coolant inlet pipe (19a) in a liquid-tight state. The second connection port member (18b) is connected to the coolant outflow pipe (19b) in a liquid-tight state. The first connection port member (18a) and the second connection port member (18b) are both formed in a short tube shape as shown in FIG. 7, and have a connection port at one end.

  On the side surface of the substrate (10), there is a first connecting port member insertion hole (13a) communicating with one end of the first bed portion forming recess (11a) and one end of the second header portion forming recess (11b). A second connection port member insertion hole (13b) communicating with the portion is provided.

  Next, the structure of the cooling plate (1) of this embodiment is demonstrated below based on the manufacturing method.

  FIG. 8 is a block diagram showing manufacturing steps of the cooling plate (1) of the present embodiment.

  First, the substrate (10), the cover plate (30), a plurality of flat perforated tubes (20), the first connecting port member (18a), and the second connecting port member (18b) are prepared [preparation] Step (50)].

  Next, as shown in FIG. 7, a plurality of tubes (20) arranged in a horizontal row in the tube receiving recess (12) of the substrate (10) are connected to the header forming recesses (11a). (11b) is housed in a communicating manner [tube housing step (51)].

  In the tube (20) housing step, a brazing material may be interposed between the bottom surface of the tube housing recess (12) of the substrate (10) and the tube (20) as necessary.

  Next, the lid plate (30) is polymerized on the surface of the substrate (10) so as to cover the entire tube (20). By superposing the lid plate (30) in this way, the tube (20) is sandwiched between the substrate (10) and the lid plate (30), and the header (10a) recesses (11a) ) (11b), the opening on the surface side of the substrate (10) is closed by the cover plate (30), so that, as shown in FIGS. 5 and 6, two header portions ( 14a) and (14b) are formed [Cover plate polymerization step (52)].

  In the polymerization process of the cover plate (30), a brazing material may be provided between the substrate (10) and the cover plate (30) or between the tube (20) and the cover plate (30) as necessary. May be interposed.

  Here, for convenience of explanation, of the two header portions (14a) and (14b), the header portion formed from the first header portion forming recess (11a) is referred to as “first header portion (14a)”. The header portion formed from the second header portion formation recess (11b) is referred to as a “second header portion (14b)”.

  In addition, the first connecting port member (18a) and the second connecting port member (18a) and the second connecting port member (30) are overlapped before the polymerization step of the lid plate (30), simultaneously with the polymerization step of the lid plate (30) or after the polymerization step of the lid plate (30). The connecting port member (18b) is inserted into the corresponding insertion hole (13a) (13b), and the first connecting port member (18a) is inserted into the first header portion forming recess (11a) (first header portion (14a)). The second connection port member (18b) is connected in communication with the second header portion forming recess (11b) (second header portion (14b)) [connection port member connection step (52)].

  Subsequently, the assembly of the cooling plates thus assembled is introduced into a furnace for brazing, and the substrate (10), the tube (20), the cover plate (30), and the first connection port member (18a) are brazed by the furnace. ) And the second connection port member (18b) are integrally joined together [joining step (53)].

  In this joining process, the substrate (10) and the cover plate (30) are mutually in a state of preventing leakage of the coolant (C) accommodated in the header portions (14a) and (14b), that is, in a liquid-tight state. To be integrated. Further, the first connection port member (18a) and the second connection port member (18b) are joined to the insertion holes (13a) and (13b) corresponding to the liquid-tight state, respectively. In FIG. 3, (47) is a filler fillet.

  The cooling plate (1) of this embodiment shown in FIG. 1 is obtained through the above steps.

  Thus, the cooling plate (1) of the present embodiment is mounted on the electric vehicle (40) as shown in FIG. This electric vehicle (40) is equipped with an existing radiator (41) for cooling the coolant. The radiator (41) is disposed at the front portion of the electric vehicle (40). In addition, (44) is a radiator fan, and (45) is a wheel.

  A coolant inflow pipe (19a) is connected to the first connection port member (18a) of the cooling plate (1) in a liquid-tight state, and the second connection port member (18b) of the cooling plate (1) is connected to the first connection port member (18a). The coolant outflow pipe (19b) is connected in a liquid-tight state. The coolant cooled by the radiator (41) flows through the coolant inflow pipe (19a). The cooling liquid flowing out from the cooling plate (1) flows through the cooling liquid outflow pipe (19b), and then the cooling liquid is supplied to the radiator (41).

  On the cooling surface (1A) of the cooling plate (1) (that is, the surface of the lid plate (30)), as shown in FIG. 1, the object to be cooled (2) (that is, the electronic component for an electric vehicle) is illustrated. Although it is not, it is fixed in a mechanically fixed state with bolts or the like through a high thermal conductivity compound, paste, sheet or the like.

  In this electric vehicle (40), as shown in FIG. 9, the coolant cooled by the radiator (41) is supplied to the coolant inlet pipe (19a) by the pump (43) through the reserve tank (receiver tank) (42). ) Through the cooling plate (1). Then, as shown in FIG. 4, the coolant (C) flows into the first header portion (14a) from the first connection port member (18a) of the cooling plate (1). The inflowing coolant (C) is branched into a large number in the first header portion (14a) and flows through each coolant passage (21) of the tube (20). During this distribution, the cooling liquid (C) takes heat of the cooled object (2) and cools the cooled object (2). And this cooling fluid (C) flows in into a 2nd header part (14b), and joins in this 2nd header part (14b). Thereafter, the combined coolant (C) flows out from the second connection port member (18b). The coolant (C) that has flowed out is supplied to the radiator (41) through the coolant outlet pipe (19b) as shown in FIG. 9, and is cooled again by the radiator (41). Thus, in this electric vehicle (40), the coolant (C) circulates between the radiator (41) and the cooling plate (1).

  Thus, in the cooling plate (1) of the present embodiment, since the porous tube (20) is used as a member through which the cooling liquid flows, the cooling plate (1) having a small cooling liquid passage (21) is provided. Can be produced. Therefore, the cooling plate (1) that can exhibit a high cooling capacity can be provided.

  In addition, when joining the substrate (10) and the cover plate (30), the tube (20) is housed in the predetermined recess (12) of the substrate (10), so the cooling surface (1A) accompanying the joining That is, it is possible to prevent the flatness of the cover plate (30) from being lowered. Therefore, the flatness of the cooling surface (1A) can be kept high. Therefore, the body to be cooled (2) can be attached to the cooling surface (1A) without any gap, and the body to be cooled (2) can be efficiently cooled.

  Furthermore, since the tube (20) is housed in the predetermined recess (12) of the substrate (10), the tube (20) may be deformed when the substrate (10) and the lid plate (30) are joined. Absent. Therefore, the coolant passage (21) of the tube (20) can be held in a predetermined shape and size.

  Further, the tube (20) is accommodated in the predetermined recess (12) of the substrate (10), and further, the substrate (10) and the tube in a state where the cover plate (30) is polymerized on the surface of the substrate (10). Since (20) and the cover plate (30) are joined and integrated, the cooling plate (1) has high mechanical strength.

  Furthermore, since the substrate (10), the tube (20), and the lid plate (30) are joined and integrated by brazing, the thermal conductivity is good. Therefore, the cooling capacity of the cooling plate (1) can be further improved.

  Furthermore, since the tube (20) is an extruded tube or a rolled tube, the cooling plate (1) having a smaller coolant passage (21) can be easily manufactured.

  Furthermore, the cooling plate (1) includes a first connection port member (18a) connected to the coolant inlet pipe (19a), and a second connection port member (18b) connected to the coolant outlet pipe (19b). Therefore, it is possible to easily connect the coolant inlet pipe (19a) and the coolant outlet pipe (19b) to the cooling plate (1).

  Furthermore, the manufacturing method of the cooling plate (1) of this embodiment includes the substrate (10), the tube (20), the lid plate (30), the first connection port member (18a), and the second connection port member (18b). Step for preparing (50), housing step for tube (20) (51), polymerization step for lid plate (30) (52), connection step for both connection port members (18a) (18b) (52) And a joining step (53). In addition, in the joining step (53), the substrate (10), the tube (20), the lid plate (30), and both connection port members (18a) (18b) Since the joining and integration are performed collectively by brazing in the furnace, the cooling plate (1) can be manufactured very easily.

  Furthermore, since the electronic part for electric vehicles (40) is attached to the cooling surface (1A) of the cooling plate (1) as the body to be cooled (2), the electronic parts can be reliably cooled. . Therefore, high reliability can be ensured over a long period of time for the operation of the electronic component.

  Thus, FIG. 10 shows the cooling liquid passage (21) in the cooling plate (1) of the present embodiment when the power of the pump (43) for allowing the cooling liquid to flow into the cooling plate (1) is constant. It is a figure (graph) which shows the relationship between equivalent diameter and thermal resistance.

  The equivalent diameter de is derived from the following equation (i).

    de = 4 A / p (i)

  Here, A is the cross-sectional area of the coolant passage (21) of the tube (20), and p is the wet circumference.

  In general, the absolute value of the thermal resistance changes depending on the size of the cooling plate (1), but the change tendency of the thermal resistance with respect to the equivalent diameter is the same as that shown in the figure regardless of the size of the cooling plate (1).

  As shown in the figure, when the equivalent diameter of the coolant passage (21) of the tube (20) is set in the range of 0.05 to 1.7 mm, the thermal resistance is reduced, and thus the high cooling capacity. It will be able to demonstrate. Further, when the equivalent diameter is set in the range of 0.1 to 1.05 mm, the thermal resistance is further reduced, and thus a higher cooling capacity can be exhibited. Further, when the equivalent diameter is set in the range of 0.15 to 0.7 mm, the thermal resistance is further reduced, and thus a further higher cooling capacity can be exhibited. Therefore, the average equivalent diameter is desirably set in the range of 0.05 to 1.7 mm, more desirably in the range of 0.1 to 1.05 mm, and particularly 0.15 to 0. Desirably, it is set in the range of 7 mm.

  Although one embodiment of the present invention has been described above, the present invention is not limited to that shown in the above embodiment, and various setting changes can be made.

  For example, in the present invention, as shown in FIG. 11, the cooling plate (1) has a body (2) to be cooled attached to the front surface of the lid plate (30) and the back surface of the substrate (10). May be. In this case, both the front surface of the cover plate (30) and the back surface of the substrate (10) act as the cooling surface (1A). Moreover, in this invention, the to-be-cooled body (2) may be attached only to the back surface of a board | substrate (10). In this case, only the back surface of the substrate (10) acts as the cooling surface (1A).

  In the present invention, the number of tubes (20) may be one or plural.

  In the present invention, a partition member (not shown) for multiple paths may be disposed in the header portions (14a) and (14b).

  In the present invention, the cooling plate (1) may be mounted on a motorcycle, a railway vehicle, or the like as a vehicle to cool the vehicle electronic components.

  In the present invention, the cooling plate (1) may be mounted on a computer instead of being mounted on a vehicle to cool computer electronic components as a cooled object. In this case, the computer electronic component can be reliably cooled.

  The liquid-cooled cooling plate and the manufacturing method thereof according to the present invention include a liquid-cooled cooling plate for cooling various heating elements (cooled bodies), including electronic parts for electric vehicles and electronic parts for computers, and the manufacturing thereof. It can be used as a method.

  The electric vehicle according to the present invention can be used as an electric vehicle equipped with a liquid-cooled cooling plate capable of reliably cooling electronic components for electric vehicles.

It is a perspective view of the liquid cooling type cooling plate which concerns on one Embodiment of this invention. It is the XX sectional view taken on the line in FIG. FIG. 3 is an enlarged view of a V portion in FIG. 2. It is the YY sectional view taken on the line in FIG. FIG. 2 is a sectional view taken along line ZZ in FIG. 1. It is an enlarged view of W part in FIG. It is a disassembled perspective view of the same cooling plate. It is a figure which shows the manufacturing process of the cooling plate. It is a schematic plan view of the electric vehicle carrying the cooling plate. In the same cooling plate, it is a figure (graph) which shows the relation between the equivalent diameter of the coolant passage of a tube, and thermal resistance. It is a figure corresponding to FIG. 2 which shows the liquid cooling type cooling plate which concerns on another embodiment of this invention.

Explanation of symbols

1 ... Cooling plate
1A ... Cooling surface 2 ... Object to be cooled
10 ... Board
11a, 11b ... Header forming recess
12 ... Recess for tube accommodation
14a, 14b ... Header
18a ... 1st connection port member
18b ... Second connecting port member
19a… Cooling liquid inflow pipe
19b ... Coolant outflow pipe
20 ... Tube
21 ... Coolant passage
30 ... Lid plate
40… Electric car (electric vehicle)
C ... Coolant

Claims (16)

At least one flat porous tube through which the coolant flows;
A substrate provided with two header portion forming recesses spaced apart from each other on the surface and a tube receiving recess portion that is formed between the two header portion forming recess portions and stores the tube;
A lid plate polymerized on the surface of the substrate;
With
A body to be cooled is attached to the front surface of the lid plate and / or the back surface of the substrate.
The tube is housed in the tube housing recess so as to communicate with both the header portion forming recesses,
The tube is sandwiched between the substrate and the lid plate in a state where the lid plate is superposed on the surface of the substrate, and the opening portions of the header portion forming recesses are blocked by the lid plate. Two header parts are formed,
The liquid cooling type cooling plate, wherein the substrate, the tube, and the lid plate are joined and integrated so as to prevent leakage of the cooling liquid stored in the header portion.   The liquid cooling type cooling plate according to claim 1, wherein the substrate, the tube, and the lid plate are joined and integrated by brazing.   The liquid-cooled cooling plate according to claim 1 or 2, wherein the tube is an extruded tube.   The liquid-cooled cooling plate according to claim 1 or 2, wherein the tube is a rolled tube.   The liquid cooling type cooling plate according to any one of claims 1 to 4, wherein an average equivalent diameter of the cooling fluid passage of the tube is set in a range of 0.05 to 1.7 mm.   A first connecting port member connected to the coolant inlet pipe is connected to one of the two header parts, and a second connecting port member connected to the coolant outlet pipe is the other header. The liquid cooling type cooling plate according to any one of claims 1 to 5, wherein the liquid cooling type cooling plate is connected in communication with the portion.   The liquid-cooled cooling plate according to claim 1, wherein the object to be cooled is an electronic component for an electric vehicle.   The liquid-cooled cooling plate according to claim 1, wherein the object to be cooled is an electronic component for a computer. At least one flat porous tube through which the coolant flows;
A substrate provided with two header portion forming recesses spaced apart from each other on the surface and a tube receiving recess portion that is formed between the two header portion forming recess portions and stores the tube;
A lid plate polymerized on the surface of the substrate;
The process of preparing
A tube housing step for housing the tube in a manner in which both the header portion forming recesses communicate with each other in the tube housing recess,
After the tube accommodating step, the cover plate is superposed on the surface of the substrate, thereby sandwiching the tube between the substrate and the cover plate, and opening portions of the header portion forming recesses. Closing with the lid plate to form two header parts, a lid plate polymerization step,
After the step of superposing the lid plate, the substrate, the tube, and the lid plate are joined and integrated in a state that prevents leakage of the coolant contained in the header portion; and
The manufacturing method of the liquid cooling type cooling plate characterized by including.   The method for producing a liquid-cooled cooling plate according to claim 9, wherein in the joining step, the substrate, the tube, and the lid plate are joined and integrated together by brazing in a furnace. Further, the first connection port member connected to the coolant inflow pipe is connected in communication with one of the tank portion forming recesses, and the second connection port member connected to the coolant outflow pipe is connected to the other Including a connection step of the connection port member, which is connected to the recess.
The method for producing a liquid-cooled cooling plate according to claim 9, wherein, in the joining step, the substrate, the tube, the lid plate, and the two connection port members are joined and integrated together by brazing in a furnace. .   The said tube is an extrusion tube, The manufacturing method of the liquid cooling type cooling plate of any one of Claims 9-11.   The said tube is a rolling tube, The manufacturing method of the liquid cooling type cooling plate of any one of Claims 9-11.   The method for producing a liquid-cooled cooling plate according to any one of claims 9 to 13, wherein an average equivalent diameter of the cooling liquid passage of the tube is set in a range of 0.05 to 1.7 mm. The liquid cooling type cooling plate according to any one of claims 1 to 7 is mounted,
An electric vehicle, wherein an electronic component is attached as an object to be cooled to the front surface of the cover plate of the cooling plate and / or the back surface of the substrate. Equipped with a radiator,
16. The electric vehicle according to claim 15, wherein the coolant cooled by the radiator flows into the cooling plate, and the coolant flowing out from the cooling plate is cooled by the radiator.

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