JP4107267B2 - Stacked cooler - Google Patents

Description

  The present invention relates to a stacked cooler for cooling an electronic component from both sides.

Conventionally, as shown in FIG. 17, there is a laminated cooler 9 in which a plurality of cooling pipes 92 are stacked so as to sandwich the electronic component 4 from both sides, and the electronic component 4 is cooled from both sides (patent). Reference 1).
The stacked cooler 9 includes a supply header 94 that supplies a cooling medium to the cooling pipe 92 and a discharge header 95 that discharges the cooling medium from the cooling pipe 92. The plurality of cooling pipes 92 arranged in a stacked manner are connected to the supply header 94 at one end and to the discharge header 95 at the other end.

However, in the conventional stacked cooler 9, the cooling pipe 2 is connected to the supply header 94 and the discharge header 95 which are separate members from the cooling pipe 92. For this reason, in manufacturing the stacked cooler 9, the number of members is large and the manufacturing cost may be increased.
In the stacked cooler 9, since the plurality of cooling pipes 92 are fixed to the supply header 94 and the discharge header 95, it is difficult to change the interval between the plurality of cooling pipes 92. Therefore, it becomes difficult to insert the electronic component 4 between the cooling pipes 92 and to ensure that the cooling pipes 92 are in close contact with both main surfaces of the electronic component 4.

Further, as shown in FIG. 18, a plurality of cooling pipes 92 are provided so as to sandwich the electronic component 4 from both sides, and the cooling pipes 92 are communicated by a communication member 93 so that the cooling medium is provided for each cooling medium. There is a stacked cooler 90 configured to flow through the cooling pipe 92 (see Patent Document 2).
However, also in this laminated cooler 90, it is necessary to assemble the laminated cooler 90 by joining the communication member 93, which is a separate member from the cooling pipe 92, to the cooling pipe 92. For this reason, there are problems that the manufacturing cost increases and it is difficult to improve productivity.

JP 2001-320005 A JP 2002-26215 A

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a stacked cooler capable of reducing the manufacturing cost.

The present invention is a stacked cooler for cooling an electronic component from both sides,
The laminated cooler is formed by laminating a plurality of flat cooling pipes provided with a refrigerant flow path for circulating a cooling medium so that the electronic component can be sandwiched from both sides. A supply header portion for supplying the cooling medium, and a discharge header portion for discharging the cooling medium from each refrigerant flow path,
The cooling pipe is provided with a protruding pipe portion that opens in the stacking direction and protrudes,
The adjacent cooling pipes connect the protruding pipe parts to each other and join the side walls of the protruding pipe parts to each other to connect the refrigerant flow paths, thereby supplying the supply header part and the discharge header part. Is formed in a stacked type cooler (claim 1).

Next, the effects of the present invention will be described.
In the stacked cooler, the refrigerant pipes in adjacent cooling pipes are connected to each other by fitting the protruding pipe portions formed in the cooling pipes together. Therefore, it is not necessary to connect the plurality of cooling pipes via separate members, the number of parts can be reduced, and manufacturing is easy.

  Moreover, the said protruding pipe part in an adjacent cooling pipe is connected by joining the side walls of this protruding pipe part. Therefore, the supply header part and the discharge header part can ensure a flow path diameter substantially equal to the inner diameter of the protruding pipe part. Thereby, while reducing the water flow resistance in a supply header part and a discharge header part, a pressure loss can be suppressed. Therefore, the cooling medium can be evenly circulated through the plurality of cooling pipes, and thus the electronic components can be uniformly cooled.

  As described above, according to the present invention, it is possible to provide a stacked type cooler capable of reducing the manufacturing cost.

In the present invention (claim 1), the electronic component may be a semiconductor module including a semiconductor element such as an IGBT and a diode, for example. And this semiconductor module can be used for the inverter for motor vehicles, the motor drive inverter of industrial equipment, the air conditioner inverter for building air conditioning, etc.
In addition to the semiconductor module, for example, a power transistor, a power FET, or an IGBT can be used as the electronic component.

  Examples of the cooling medium include water mixed with ethylene glycol antifreeze, natural refrigerants such as water and ammonia, fluorocarbon refrigerants such as fluorinate, chlorofluorocarbon refrigerants such as HCFC123 and HFC134a, methanol, alcohol, and the like. Alcohol-based refrigerants such as acetone and ketone-based refrigerants such as acetone can be used.

Moreover, it is preferable that the said cooling pipe forms the diaphragm part which deform | transforms in the lamination direction around the said protrusion pipe part (Claim 2).
In this case, the interval between the adjacent cooling pipes can be easily adjusted, and the electronic component can be easily and reliably disposed between the adjacent cooling pipes. Then, the electronic component and the cooling pipe can be reliably brought into close contact with the cooling pipe or the heat transfer member interposed between them.

  In arranging the electronic component in the stacked cooler, for example, the electronic component can be sandwiched between the cooling pipes by deforming the diaphragm portion toward the inside of the cooling pipe. . Also, once the diaphragm part is deformed toward the outside of the cooling pipe, the interval between adjacent cooling pipes is expanded, and after inserting electronic components between them, the interval between the cooling pipes is reduced. An electronic component may be sandwiched.

Preferably, the cooling pipe is formed with the diaphragm portion around one of the pair of protruding pipe portions arranged opposite to each other, and is not formed around the other. .
In this case, it is easy to manufacture the stacked cooler so as to have a certain shape in a state where the electronic component is sandwiched.

That is, if the diaphragm portions are provided around the projecting tube portions and deformed, there is a possibility that variations in the respective deformation amounts occur. In this case, if the deformation amount of the diaphragm portion is to be adjusted, it is necessary to accurately manage various conditions such as the drawing ratio and plate thickness of the press forming of the cooling pipe.
Therefore, by providing the diaphragm portion only on one side as described above, it becomes easy to perform the deformation when the electronic component is held by the cooling pipe as substantially designed.

Preferably, the cooling pipe is formed by forming the diaphragm part around a protruding pipe part formed downstream of the supply header part among the pair of protruding pipe parts. .
In this case, it can prevent that the smooth supply of the cooling medium from a supply header part to a cooling pipe is prevented by the said diaphragm part.

Preferably, the cooling pipe is provided with a constriction that narrows the width of the refrigerant flow path at the inlet of the refrigerant flow path.
In this case, the minimum flow path cross-sectional area in the plurality of refrigerant flow paths can be easily made uniform, and the flow rate of the cooling medium to each refrigerant flow path can be made uniform.

The cooling pipe includes a pair of outer shell plates, an intermediate plate disposed between the pair of outer shell plates, a wave-shaped inner fin disposed between the intermediate plate and the outer shell plate, (Claim 6).
In this case, the outer shell plate, the intermediate plate, and the inner fin are separately press-molded, and then joined together to obtain a so-called drone cup structure cooling pipe. Therefore, the cooling pipe can be easily manufactured.

Moreover, it becomes easy to form the said inner fin in a desired part. Thus, for example, inner fins are not disposed in the portions that become the supply header portion and the discharge header portion, and the processing of the supply header portion and the discharge header portion can be facilitated.
In this case, the refrigerant flow path is formed in two stages in the stacking direction of the cooling pipes. Therefore, the movement of heat between electronic components arranged on both sides of the cooling pipe can be suppressed. Thereby, for example, the influence on the other electronic component due to the rapid temperature rise of the one electronic component can be suppressed.

The outer shell plate includes a brazing sheet having a core material and a brazing material disposed on the inner surface of the core material, and the intermediate plate and the inner fin are lower than the core material of the outer shell plate. Preferably, the pair of outer shell plates are formed by joining the inner side surfaces at the end portions to each other (Claim 7).
In this case, the inner fin and the intermediate plate can be preferentially corroded with respect to the outer shell plate, and corrosion of the outer shell plate can be prevented. Thereby, leakage of the cooling medium from the cooling pipe can be prevented.

Further, since the brazing material is disposed on the joining surfaces of the pair of outer shell plates, the pair of outer shell plates can be easily brazed and joined, and the cooling pipe can be easily manufactured. .
The “base metal than the core material” refers to a metal having a lower corrosion potential than the metal used as the core material. For example, when aluminum (Al) is used as the core material and the brazing material, a metal material obtained by adding zinc (Zn) to aluminum can be used as the metal plate used for the intermediate plate and the inner fin.

The outer shell plate is preferably composed of a brazing sheet having a core material, a sacrificial anode material disposed on the inner surface of the core material, and the brazing material disposed on the inner surface of the sacrificial anode material ( Claim 8).
In this case, the sacrificial anode material can be preferentially corroded with respect to the core material even in the outer shell plate, and corrosion of the core material can be prevented. Thereby, corrosion does not advance in the thickness direction of the outer shell plate, and it is possible to prevent the cooling pipe from opening a hole.
For example, when aluminum (Al) is used as the core material, a metal material obtained by adding zinc (Zn) to aluminum can be used as the sacrificial anode material.

The outer shell plate is composed of a brazing sheet having a core material and a sacrificial anode material disposed on the inner surface of the core material, and the intermediate plate is disposed on both surfaces of the core material and the core material. The inner fin is made of a metal plate containing a base metal than the core material of the outer shell plate, and the pair of outer shell plates has an inner surface at an end portion thereof, Preferably, the intermediate plate is bonded to both surfaces at the end of the intermediate plate.
In this case, the inner surface of the cooling pipe can be entirely covered with the sacrificial anode material, so that the core material of the outer shell plate can be prevented from being corroded and the cooling pipe can be prevented from opening a hole.
Further, the pair of outer shell plates are joined to the end portions on both sides of the intermediate plate having the brazing material on both sides. Therefore, the pair of outer shell plates can be easily brazed and joined to the intermediate plate, and the cooling pipe can be easily manufactured.

  The first cooling pipe disposed at one end in the stacking direction of the plurality of cooling pipes includes a refrigerant inlet for introducing the cooling medium into the supply header section, and the cooling medium from the discharge header section. A refrigerant discharge port for discharging, and the refrigerant introduction port and the refrigerant discharge port are provided with projecting openings protruding outside the first cooling pipe, and the refrigerant introduction port and the refrigerant discharge port. It is preferable that a refrigerant introduction pipe and a refrigerant discharge pipe are fitted into the projecting openings in the above (claim 10).

In this case, it is possible to prevent the flow path between the supply header section or the discharge header section and the refrigerant flow path from being blocked by the refrigerant introduction pipe or the refrigerant discharge pipe. Thereby, also about the said 1st cooling pipe, the flow-path cross-sectional area similar to another cooling pipe can be ensured, and it becomes possible to cool an electronic component equally.
The protruding opening can be formed, for example, by being raised substantially vertically from the main surface of the cooling pipe by burring. Further, the projecting opening can project 2 mm, for example.

(Example 1)
A stacked cooler according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the laminated cooler 1 of this example accommodates a power element that controls high power and cools an electronic component 4 formed in a plate shape from both sides. The electronic component 4 is formed in a flat rectangular parallelepiped shape, and a power electrode extends from one long side outer peripheral surface, and a control electrode extends from the other long side outer peripheral surface.

  The cooling pipe 2 is arranged in contact with one main plane of the electronic component 4, and the cooling pipe 2 is arranged in contact with the other main plane of the electronic component 4. These cooling pipes 2 are connected to a supply header part 11 and a discharge header part 12 provided at both ends of the cooling pipe 2. In this embodiment, the plurality of electronic components 4 are cooled from both sides. Therefore, the plurality of electronic components 4 and the plurality of cooling pipes 2 are alternately arranged. The cooling pipes 2 are disposed at both ends in the stacking direction in an assembly in which a plurality of electronic components 4 and a plurality of cooling pipes 2 are stacked.

  The multilayer cooler 1 is formed by laminating and arranging a plurality of flat cooling tubes 2 provided with a refrigerant flow path 21 through which a cooling medium 5 flows so that the electronic component 4 can be sandwiched from both sides. The stacked cooler 1 includes a supply header portion 11 that supplies the cooling medium 5 to each refrigerant flow path 21 and a discharge header portion 12 that discharges the cooling medium 5 from each refrigerant flow path 21.

  As shown in FIGS. 1 and 2, the cooling pipe 2 is provided with a protruding pipe portion 22 that opens in the stacking direction and protrudes. As shown in FIG. 4, the cooling pipe 2 is configured by laminating plates made of a metal plate having high thermal conductivity such as aluminum or copper, and joining these plates by a joining technique such as brazing. The plate is generally rectangular in shape. The outer shell plate 27 constituting the outer shell of the cooling pipe 2 includes a portion constituting a flat tube for contacting the electronic component 4 and taking heat away, and a portion constituting the supply header portion 11 and the discharge header portion 12. Have. Portions constituting the supply header portion 11 and the discharge header portion 12 are formed at both end portions of the outer shell plate 27.

  In the outer shell plate 27, the portions constituting the supply header portion 11 and the discharge header portion 12 are a protruding tube portion 22 protruding vertically from the plate-like surface of the outer shell plate 27, and a base portion of the protruding tube portion 22. It is characterized by a diaphragm portion 23 formed in an annular shape around the periphery with a predetermined radial width. The protruding pipe part 22 connects the adjacent cooling pipes 2 in the stacking direction, constitutes the supply header part 11 and the discharge header part 12, and provides strength that does not buckle in the stacking direction.

The cooling pipe 2 can be constituted by a flat pipe part, a diaphragm part 23, and a protruding pipe part 22 extending in the stacking direction. The protruding tube portion 22 may be constituted by a separate tubular member.
In addition, the protruding tube portion 22 is connected in-lay. That is, as the protruding tube portion 22, there are a stepped large diameter protruding tube portion 223 disposed on the outside and a small diameter protruding tube portion 222 inserted and disposed inside the large diameter protruding tube portion 223. For this reason, the stacked cooler 1 includes at least two types of outer shell plates 27. One outer shell plate 27 has a large-diameter protruding tube portion 223, and the remaining one outer shell plate 27 has a small-diameter protruding tube portion 222. These two types of outer shell plates 27 are laminated alternately and on the front and back.

  The stacked cooler 1 further includes outer shell plates 27 for end portions at both ends thereof. That is, the outer shell plate 27 for one end portion does not form the protruding tube portion 22 and is not open. The outer shell plate 27 for the other end is an outer shell plate 27 for the cooling pipe 20 described later. Instead of the protruding pipe part 22, a refrigerant introduction pipe 31 and a refrigerant discharge pipe 32 are provided as shown in FIG. A projecting opening 24 to be connected is formed.

  The large-diameter protruding tube portion 223 receives the small-diameter protruding tube portion 222 therein. The step portion formed in the large-diameter protruding tube portion 223 functions as a restricting portion for restricting the insertion length of the small-diameter protruding tube portion 222. The tip of the small-diameter protruding tube portion 222 is in contact with the stepped portion, and the insertion length in the axial direction is restricted. The restricting portion can be formed by a bulging portion or a bulge portion that is formed to protrude from the outer peripheral surface of the small-diameter protruding tube portion 222. Between the inner surface of the large-diameter protruding tube portion 223 and the outer surface of the small-diameter protruding tube portion 222, there is a gap that can be inserted in the assembly process, but both are joined by brazing, and the gap is closed, Sealed.

The projecting tube portion 22 after joining provides a rigidity that does not buckle even when the diaphragm portion 23 is subjected to a pressing force that causes the plastic deformation of the diaphragm portion 23 in the axial direction, that is, the stacking direction.
As shown in FIGS. 2 and 3, an outer peripheral wall surface 274 that rises in the stacking direction, a narrow flange portion 275 that spreads outward from the outer peripheral wall surface, and a distal end of the flange portion 275 are further provided on the outer edge of the outer shell plate 27. An edge portion 276 extending obliquely is formed. The flange portion 275 provides a flat surface extending in a direction perpendicular to the stacking direction.

  The pair of outer shell plates 27 are arranged with their flange portions 275 in parallel contact and joined by brazing. Therefore, the outer shell plate 27 is laminated and joined between the planes perpendicular to the laminating direction by the flange portion 275 at the outer edge portion thereof. On the other hand, the outer shell plate 27 is laminated and joined between the cylindrical surfaces parallel to the laminating direction by connecting the protruding pipe portions 22 in the portions constituting the supply header portion 11 and the discharge header portion 12. Is done. A configuration may be adopted in which a flange portion is provided at the tip of the projecting tube portion 22 that extends oppositely and is laminated and joined between planes perpendicular to the laminating direction.

  Compared with the laminated structure between the planes perpendicular to the laminating direction, the configuration using the spigot joint of the projecting pipe part 22 has a greater degree of freedom in adjusting the axial length, and the manufacturing process of the outer shell plate 27 is easier. There are advantages such as ease and low cost.

As described above, the adjacent cooling pipes 2 are connected to each other by connecting the protruding pipe parts 22 to each other and joining the side walls of the protruding pipe parts 22 to each other. Thereby, the supply header portion 11 and the discharge header portion 12 are formed.
As shown in FIG. 2, the cooling pipe 2 is formed by forming a diaphragm portion 23 that deforms in the stacking direction around the protruding tube portion 22. The diaphragm 23 is deformed toward the inside of the cooling pipe 2 when the interval between the adjacent cooling pipes 2 is narrowed when the electronic component 4 is disposed in the multilayer cooler 1.

  That is, before sandwiching the electronic component 4, as shown in FIG. 3, the stacked cooler 1 stacks a plurality of cooling pipes 2 at intervals slightly wider than the thickness of the electronic component 4, and The two protruding pipe portions 22 are connected. A plurality of electronic components 4 are arranged between the cooling pipes 2 of the stacked cooler 1 in this state. Thereafter, the stacked cooler 1 is pressed in the stacking direction. Thereby, a pressing force is applied to the diaphragm portion 23 through the protruding tube portion 22, and the diaphragm portion 23 is deformed toward the inside of the cooling tube 2 as shown in FIG. 2. Thereby, the space | interval between the adjacent cooling pipes 2 is narrowed, the cooling pipe 2 and the electronic component 4 closely_contact | adhere, and the electronic component 4 will be in the state clamped by the cooling pipe 2. FIG.

As shown in FIG. 4, the cooling pipe 2 includes a pair of outer shell plates 27, an intermediate plate 28 disposed between the pair of outer shell plates 27, the intermediate plate 28 and the outer shell plate 27. And a wave-shaped inner fin 29 disposed between the two.
A refrigerant flow path 21 is formed between the intermediate plate 28 and the outer shell plate 27.
Further, the outer shell plate 27, the intermediate plate 28, and the inner fin 29 are brazed and joined together to constitute the cooling pipe 2.
The intermediate plate 28 has a rectangular plate shape. The intermediate plate 28 has circular openings 284 corresponding to the supply header portion 11 and the discharge header portion 12 at both ends thereof. Further, the outer edge portion of the intermediate plate 28 may be sandwiched between the outer shell plates 27.

  Moreover, as shown in FIG. 1, the 1st cooling pipe 20 distribute | arranged to the end of the lamination direction among the said several cooling pipes 2 is the refrigerant | coolant inlet 13 for introducing the cooling medium 5 into the supply header part 11, It has a refrigerant discharge port 14 for discharging the cooling medium 5 from the discharge header portion 12. As shown in FIG. 5, the refrigerant inlet 13 and the refrigerant outlet 14 are provided with a projecting opening 24 that projects outward from the first cooling pipe 20. Then, the refrigerant introduction pipe 31 and the refrigerant discharge pipe 32 are fitted into the protruding openings 24 in the refrigerant introduction port 13 and the refrigerant discharge port 14, respectively.

The protruding opening 24 rises substantially perpendicularly from the main surface of the first cooling pipe 20 by burring and protrudes by about 2 mm.
The refrigerant introduction pipe 31 and the refrigerant discharge pipe 32 are each provided with a brim portion 34 at a portion retreated by about 2 mm from the end face of each opening tip 33.

  And the opening front-end | tip part 33 of the refrigerant | coolant introduction pipe 31 and the refrigerant | coolant discharge pipe 32 is fitted inside the protrusion opening part 24, respectively, and the collar part 34 contact | abuts the front-end | tip of the protrusion opening part 24. FIG. As a result, the opening tip 33 of the refrigerant introduction pipe 31 or the refrigerant discharge pipe 32 does not enter the inside of the outer shell plate 27 in the cooling pipe 2 and does not shield the refrigerant flow path 21.

The electronic component 4 is a semiconductor module including a semiconductor element such as an IGBT and a diode. And this semiconductor module comprises a part of inverter for motor vehicles.
The cooling medium 5 is water mixed with an ethylene glycol antifreeze.
Further, the electronic component 4 can be disposed in a state of being in direct contact with the cooling pipe 2. However, depending on the case, an insulating plate such as ceramic, thermally conductive grease, or the like may be interposed between the electronic component 4 and the cooling pipe 2.

Next, the function and effect of this example will be described.
In the laminated cooler 1, as shown in FIGS. 1 and 2, the projecting pipe portions 22 formed in the cooling pipe 2 are fitted to each other so that the refrigerant flow paths 21 in adjacent cooling pipes are formed. Communicate. Therefore, it is not necessary to connect the plurality of cooling pipes 2 through separate members, and the number of parts can be reduced and the manufacture is easy.

  Moreover, the said protruding pipe part 22 in the adjacent cooling pipe 2 is connected by joining the side walls of this protruding pipe part 22, as shown in FIG. Therefore, the supply header portion 11 and the discharge header portion 12 can ensure a flow path diameter substantially equal to the inner diameter of the protruding tube portion 22. Thereby, while reducing the water flow resistance in the supply header part 11 and the discharge header part 12, a pressure loss can be suppressed. Therefore, the cooling medium 5 can be evenly distributed to the plurality of cooling pipes 2, and thus the plurality of electronic components 4 can be evenly cooled.

  As shown in FIG. 2, the cooling pipe 2 is formed by forming the diaphragm portion 23 around the protruding pipe portion 22. Therefore, the interval between the adjacent cooling pipes 2 can be easily adjusted, and the electronic component 4 can be easily and reliably disposed between the adjacent cooling pipes 2. In addition, the electronic component 4 can be securely attached to the cooling pipe 2.

  The cooling pipe 2 has a pair of outer shell plates 27, an intermediate plate 28, and inner fins 29. Therefore, the outer shell plate 27, the intermediate plate 28, and the inner fin 29 are separately press-molded, and then joined together to obtain the cooling pipe 2 having a so-called drone cup structure. Therefore, the cooling pipe 2 can be easily manufactured.

Moreover, it becomes easy to form the inner fin 29 in a desired part. Thereby, it is possible to facilitate the processing of the supply header portion 11 and the discharge header portion 12 without arranging the inner fins 29 in the portions that become the supply header portion 11 and the discharge header portion 12.
In this case, as shown in FIG. 4, the refrigerant flow path 21 is formed in two stages in the stacking direction of the cooling pipes 2. Therefore, the movement of heat between the electronic components 4 disposed on both sides of the cooling pipe 2 can be suppressed. Thereby, the influence on the other electronic component 4 by the rapid temperature rise of one electronic component 4 can be suppressed, for example.

  The refrigerant inlet 13 and the refrigerant outlet 14 in the first cooling pipe 20 are provided with the protruding openings 24 as shown in FIG. Therefore, the refrigerant introduction pipe 31 or the refrigerant discharge pipe 32 can prevent the flow path between the supply header part 11 or the discharge header part 12 and the refrigerant flow path 21 from being blocked. Thereby, also about the 1st cooling pipe 20, the flow-path cross-sectional area similar to the other cooling pipe 2 can be ensured, and it becomes possible to cool the electronic component 4 equally.

  As described above, according to this example, it is possible to provide a stacked type cooler that can reduce the manufacturing cost and can evenly distribute the cooling medium to the plurality of cooling pipes.

(Example 2)
In this example, as shown in FIGS. 6 to 8, the cooling pipe 2 is formed by forming a diaphragm portion 23 around one of the pair of protruding pipe portions 22 arranged to face each other, and around the other. This is not an example.
The cooling pipe 2 is formed by forming a diaphragm portion 23 around the protruding tube portion 22 formed on the downstream side of the supply header portion 11 among the pair of protruding tube portions 22.
In addition, a rectifying unit 25 in which a part of the intermediate plate 28 is deformed upstream of the supply header unit 11 is provided at the inlet of the cooling pipe 2. The rectifying unit 25 is configured such that the cross-sectional area of the flow path at the inlet of the two-stage refrigerant flow path 21 with the intermediate plate 28 interposed therebetween is uniform.

  The rectifying unit 25 is formed at the edge of the opening 284 of the intermediate plate 28. The rectifying unit 25 adjusts the distribution of the refrigerant fluid to the upper and lower flow paths defined by the intermediate plate 28. The distribution amount of the refrigerant fluid can be adjusted uniformly or non-uniformly depending on the shape of the rectifying unit 25 according to the cooling request of the electronic component 4 that is the cooling target. The rectifying unit 25 is formed by deforming the edge of the opening of the intermediate plate 28 by a predetermined amount in the same direction as the deformation direction of the diaphragm 23 provided only on one side of the cooling pipe 2.

As described above, as a method of forming the diaphragm portion 23 only around one protruding tube portion 22, that is, a method of deforming only one, for example, as shown in FIGS. There is a method of reinforcing the rising portion so as not to be deformed by the pressing force in the stacking direction. That is, the method shown in FIG. 7 is a method of increasing the radius of curvature of the outer shell plate 27 at the rising portion of the other protruding tube portion 22. Further, in the method shown in FIG. 8, the fillet 221 of the brazing material formed by brazing and joining with the protruding tube portion 22 of the adjacent cooling tube 22 is applied to the rising portion of the other protruding tube portion 22. Is the method.
Others are the same as in the first embodiment.

In the case of this example, it becomes easy to manufacture the multilayer cooler 1 so as to have a certain shape in a state where the electronic component 4 is sandwiched.
That is, as in the case of the first embodiment (see FIG. 2), if the diaphragm portions 23 are provided around the projecting tube portions 22 to be deformed, there is a possibility that variations in the respective deformation amounts occur. In this case, if the amount of deformation of the diaphragm portion 23 is to be adjusted, it is necessary to accurately manage various conditions such as the drawing ratio and the plate thickness of the press forming of the cooling pipe 2.
Therefore, as described above, by providing the diaphragm portion 23 only on one side, it becomes easy to perform the deformation when the electronic component 4 is clamped by the cooling pipe 2 as substantially designed.

  Further, the cooling pipe 2 is formed by forming a diaphragm portion 23 around the protruding tube portion 22 formed on the downstream side of the supply header portion 11 among the pair of protruding tube portions 22. Therefore, the smooth supply of the cooling medium 5 from the supply header portion 11 to the cooling pipe 2 can be prevented from being hindered by the diaphragm portion 23.

That is, as shown in FIG. 9, when the diaphragm portion 23 is provided around the protruding tube portion 22 formed on the upstream side of the supply header portion 11 among the pair of protruding tube portions 22, the supply header portion 11 The smooth supply of the cooling medium 5 to the cooling pipe 2 may be hindered. That is, when the cooling medium 5 is supplied from the supply header part 11 to the cooling pipe 2, the flow of the cooling medium 5 may be separated in the vicinity of the diaphragm part 23.
In addition, the same effects as those of the first embodiment are obtained.

(Example 3)
In this example, as shown in FIG. 10, the cooling pipe 2 is an example in which a throttle portion 26 that narrows the width of the refrigerant flow path 21 is provided at the inlet of the refrigerant flow path 21.
The cooling pipe 2 is provided with a diaphragm portion 23 and a rectifying portion 25 as in the second embodiment.

The narrowed portion 26 is formed at the same time as the outer shell plate 27 is press-formed.
The throttle part 26 extends continuously over the width direction of the part of the outer shell plate 27 that forms the flat part of the cooling pipe 2. The throttle part 26 is formed in the outer shell plate 27 in a groove shape when viewed from the outside. The restricting portion 26 restricts the height of the coolant channel 21 in the stacking direction. The throttle part 26 can be formed as a concave part arranged intermittently.

The throttle part 26 is disposed downstream of the diaphragm part 23 and is disposed between the diaphragm part 23 and a part of the cooling pipe 2 that contacts the electronic component 4. In addition, the throttle portion 26 is disposed on the upstream side of the portion of the cooling pipe 2 that contacts the electronic component 4.
The throttle part 26 can also be arranged on the downstream side of the portion of the cooling pipe 2 that contacts the electronic component 4, and on both sides of the upstream side of the portion of the cooling pipe 2 that contacts the electronic component 4 and the downstream side. Can be arranged.

Further, the diaphragm portion 26 has higher rigidity than the diaphragm portion 23. The range of the diaphragm portion 23 is grasped as a portion that has relatively low rigidity and is easily plastically deformed in the stacking direction.
Further, in the throttle portion 26, the shape of the throttle portion 26 is set so that the cross-sectional area of the refrigerant channel 21 is minimized. The minimum channel cross-sectional area is made uniform in all the cooling pipes 2.
Others are the same as in the first embodiment.

In the case of this example, even if the communication area between the header portion and the coolant channel changes due to the deformation of the diaphragm portion 23, the flow rate to the coolant channel can be adjusted to a desired value by the throttle portion 26. This configuration exhibits an advantageous effect when the amount of deformation of the plurality of diaphragm portions 23 varies. That is, even if the deformation amount of the diaphragm portion 23 varies, it is easy to make the minimum flow passage cross-sectional areas of the plurality of refrigerant flow passages 21 uniform, and the flow rate of the cooling medium 5 to each refrigerant flow passage 21 is made uniform. can do.
In addition, the same effects as those of the first embodiment are obtained.

Example 4
In this example, as shown in FIGS. 11 and 12, the following metal plates are used as the outer shell plate 27, the intermediate plate 28, and the inner fin 29 constituting the cooling pipe 2.
That is, the outer shell plate 27 is composed of a brazing sheet having a core material 271 and a brazing material 272 disposed on the inner surface of the core material 271.
The intermediate plate 28 and the inner fin 29 are made of a metal plate containing a base metal (a metal having a lower corrosion potential) than the core material 271 of the outer shell plate 27.

In addition, the pair of outer shell plates 27 join the inner side surfaces at the end portions to each other.
In the case of this example, as shown in FIG. 12, the protruding tube portion 22 is in a state in which a brazing material 272 is disposed on the inner surface. When the protruding tube portions 22 of adjacent cooling tubes 2 are fitted to each other, the brazing material 272 disposed on the inner surface of one protruding tube portion 22 is placed on the outer surface of the core material 271 of the other protruding tube portion 22. It will be in contact. Therefore, the projecting tube portions 22 are joined to each other by the brazing material 272 by heating the contact portion in this state.

As the core material 271 and the brazing material 272 in the outer shell plate 27, aluminum (Al) is used, and as the metal plate used for the intermediate plate 28 and the inner fin 29, a metal material in which zinc (Zn) is added to aluminum is used. it can.
Others are the same as in the first embodiment.
FIG. 12 shows a state before the diaphragm portion 23 is deformed. The same applies to FIGS. 14 and 16 described later.

In the case of this example, the inner fin 29 and the intermediate plate 28 can be preferentially corroded with respect to the outer shell plate 27, and corrosion of the outer shell plate 27 can be prevented. Thereby, the leakage of the cooling medium 5 from the cooling pipe 2 can be prevented.
Further, since the brazing material 272 is disposed on the joining surfaces of the pair of outer shell plates 27, the pair of outer shell plates 27 can be easily brazed and joined, and the cooling pipe 2 is easily manufactured. be able to.

Further, as shown in FIG. 12, since the protruding pipe part 22 is provided with the brazing material 272 on the inner side surface, when the protruding pipe parts 22 of the adjacent cooling pipes 2 are fitted to each other, The brazing material 272 disposed on the inner side surface contacts the outer side surface of the core member 271 of the other protruding pipe part 22. Thereby, the protruding tube portions 22 can be easily joined to each other by the brazing material 272.
In addition, the same effects as those of the first embodiment are obtained.

(Example 5)
In this example, as shown in FIGS. 13 and 14, as the outer shell plate 27, a core material 271, a sacrificial anode material 273 disposed on the inner surface of the core material 271, and an inner surface of the sacrificial anode material 273 are arranged. This is an example using a brazing sheet having a brazing filler metal 272.
As the sacrificial anode material 273, a metal material in which zinc (Zn) is added to aluminum (Al) can be used.
Others are the same as in the fourth embodiment.

In the case of this example, the sacrificial anode material 273 is preferentially corroded with respect to the core material 271 even in the outer shell plate 27, and corrosion of the core material 271 can be prevented. Thereby, corrosion does not advance in the thickness direction of the outer shell plate 27, and it is possible to prevent the cooling pipe 2 from opening a hole.
In addition, the same effects as those of the fourth embodiment are obtained.

(Example 6)
In this example, as shown in FIGS. 15 and 16, a brazing sheet having a core material 271 and a sacrificial anode material 273 disposed on the inner surface of the core material 271 is used as the outer shell plate 27.
The intermediate plate 28 is made of a brazing sheet having a core material 281 and a brazing material 282 disposed on both surfaces of the core material 281. The inner fin 29 is made of a metal plate containing a base metal (a metal having a low corrosion potential) than the core material 271 of the outer shell plate 27.
As the metal plate constituting the inner fin 29 and the sacrificial anode material 273, a metal material in which zinc (Zn) is added to aluminum (Al) can be used.

The pair of outer shell plates 27 are formed by joining the inner side surfaces at the end portions to both surfaces at the end portions of the intermediate plate 28.
Further, as shown in FIG. 16, the protruding tube portion 22 is constituted by an outer shell plate 27 on which no brazing material is disposed. Therefore, the joining in the protruding pipe part 22 of the adjacent cooling pipe 2 is performed by newly arranging a paste brazing material, a ring brazing material or the like (not shown).
Others are the same as in the first embodiment.

In the case of this example, it becomes possible to cover all the inner surfaces of the cooling pipe 2 with the sacrificial anode material 273, thereby preventing the core material 271 of the outer shell plate 27 from being corroded and preventing the cooling pipe 2 from opening a hole. be able to.
In addition, the pair of outer shell plates 27 are joined to both end portions of the intermediate plate 28 in which the brazing material 282 is disposed on both surfaces. Therefore, the pair of outer shell plates 27 can be easily brazed and joined to the intermediate plate 28, and the cooling pipe 2 can be easily manufactured.
In addition, the same effects as those of the first embodiment are obtained.

FIG. 3 is a plan view of the stacked cooler in the first embodiment. Sectional drawing of the supply header part vicinity of a laminated | stacked cooler in Example 1. FIG. Sectional drawing of the supply header part vicinity before deform | transforming a diaphragm part in Example 1. FIG. FIG. 3 is a cross-sectional perspective view of the cooling pipe in the first embodiment. Sectional drawing of the connection part of a refrigerant introduction pipe (refrigerant discharge pipe) and a refrigerant introduction port (refrigerant discharge port) in Example 1. FIG. Sectional drawing of the supply header part vicinity of a laminated | stacked cooler in Example 2. FIG. Sectional drawing of the supply header part vicinity which enlarged the curvature radius of the rising part of the protrusion pipe | tube part in Example 2. FIG. Sectional drawing of the supply header part vicinity which reinforced the rising part of the protrusion pipe part in Example 2 with the fillet of the brazing material. Sectional drawing of the supply header part vicinity of a laminated | stacked cooler in a comparative example. Sectional drawing of the supply header part vicinity of a laminated | stacked cooler in Example 3. FIG. Sectional drawing of the cooling pipe by the cross section orthogonal to a refrigerant flow path in Example 4. FIG. Sectional drawing of the supply header part (discharge header part) in Example 4. FIG. Sectional drawing of the cooling pipe by the cross section orthogonal to a refrigerant flow path in Example 5. FIG. Sectional drawing of the supply header part (discharge header part) in Example 5. FIG. Sectional drawing of the cooling pipe by the cross section orthogonal to a refrigerant flow path in Example 6. FIG. Sectional drawing of the supply header part (discharge header part) in Example 6. FIG. The top view of a laminated | stacked cooler in a prior art example. Sectional drawing of the laminated | stacked cooler in another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stack type cooler 11 Supply header part 12 Discharge header part 2 Cooling pipe 21 Refrigerant flow path 22 Protrusion pipe part 23 Diaphragm part 27 Outer shell plate 28 Intermediate plate 29 Inner fin 4 Electronic component 5 Cooling medium

Claims (10)

A laminated cooler for cooling electronic components from both sides,
The laminated cooler is formed by laminating a plurality of flat cooling pipes provided with a refrigerant flow path for circulating a cooling medium so that the electronic component can be sandwiched from both sides, and in each of the refrigerant flow paths. A supply header portion for supplying the cooling medium, and a discharge header portion for discharging the cooling medium from each refrigerant flow path,
The cooling pipe is provided with a protruding pipe portion that opens in the stacking direction and protrudes,
The adjacent cooling pipes connect the protruding pipe parts to each other and join the side walls of the protruding pipe parts to each other to connect the refrigerant flow paths, thereby supplying the supply header part and the discharge header part. A stacked type cooler characterized by forming   2. The stacked cooler according to claim 1, wherein the cooling pipe is formed with a diaphragm portion that is deformed in a stacking direction around the protruding pipe portion.   3. The cooling pipe according to claim 2, wherein the diaphragm part is formed around one of the pair of protruding pipe parts arranged opposite to each other, and is not formed around the other. Stacked cooler.   4. The cooling pipe according to claim 3, wherein the diaphragm part is formed around a protruding pipe part formed downstream of the supply header part among the pair of protruding pipe parts. Stacked cooler.   5. The stacked cooler according to claim 1, wherein the cooling pipe is provided with a throttle portion that narrows a width of the refrigerant flow path at an inlet of the refrigerant flow path.   6. The cooling pipe according to claim 1, wherein the cooling pipe includes a pair of outer shell plates, an intermediate plate disposed between the pair of outer shell plates, the intermediate plate, and the outer shell plate. A laminated type cooler having a wave-shaped inner fin arranged therebetween.   In Claim 6, the said outer shell plate consists of a brazing sheet which has a core material and the brazing material distribute | arranged to the inner surface of this core material, The said intermediate | middle plate and the said inner fin are the said core materials of the said outer shell plate. A laminated type cooler comprising a metal plate containing a base metal, and the pair of outer shell plates are formed by joining inner side surfaces at end portions to each other.   In Claim 7, the said outer shell plate consists of a brazing sheet | seat which has a core material, the sacrificial anode material distribute | arranged to the inner surface of this core material, and the said brazing | wax material distribute | arranged to the inner surface of this sacrificial anode material. A laminated cooler characterized by.   In Claim 6, the said outer shell plate consists of a brazing sheet | seat which has a core material and the sacrificial anode material distribute | arranged to the inner surface of this core material, The said intermediate | middle plate is on both surfaces of a core material and this core material. The inner fin is made of a metal plate containing a base metal than the core material of the outer shell plate, and the pair of outer shell plates are formed at the inner ends. A laminated cooler characterized in that side surfaces are joined to both surfaces of the end portion of the intermediate plate.   In any 1 paragraph of Claims 1-9, the 1st cooling pipe arranged at one end of the laminating direction among a plurality of above-mentioned cooling pipes is a refrigerant inlet for introducing the above-mentioned cooling medium into the above-mentioned supply header part. And a coolant discharge port for discharging the cooling medium from the discharge header portion, and the coolant introduction port and the coolant discharge port are provided with projecting openings protruding outside the first cooling pipe. A stacked type cooler, wherein a refrigerant introduction pipe and a refrigerant discharge pipe are fitted in the projecting openings of the refrigerant introduction port and the refrigerant discharge port, respectively.

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