JP6243232B2 - Method of manufacturing fin for heat exchanger, fin and heat exchanger - Google Patents

Description

  The present invention relates to a method of manufacturing a heat exchanger fin used as a heat sink as an example, and a heat exchanger using the fin.

A heat sink for cooling a heating element such as a power transistor or an integrated circuit package is required to be compact and have a large heat transfer area.
The following Patent Documents 1 and 2 press-mold a large number of plates, have a frame portion on the outer periphery, and have a pair of manifold portions in the upstream region and the downstream region in the flow direction of the heat absorption medium inside, A punching plate having a large number of slits is prepared. The punching plate is laminated in the thickness direction, and end plates are arranged at both upper and lower ends in the lamination direction.
And a power transistor, an integrated circuit package, etc. are stuck to the end plate, and a heat absorption medium is distribute | circulated inside.

JP 2012-18966 A JP 2010-205981 A

The heat sink as described above is formed by laminating a large number of independent plates and brazing and fixing each plate, and has a disadvantage that the number of parts is large and the assembly is troublesome. In addition, as a method of manufacturing a heat sink with a small number of parts, a method of manufacturing a thick fin by die casting or a method of manufacturing by forging can be considered, but in the case of die casting, subsequent brazing cannot be performed, and by forging Will increase its cost. Furthermore, when fins are manufactured by die casting or forging, it is difficult to change the design of the flow path shape.
Accordingly, the present invention provides a method for manufacturing a heat exchanger fin that is easy to change the design of the flow channel shape, is low in cost, has a small number of parts, and is easy to assemble, and a heat exchanger using the fin. Let it be an issue.

According to the first aspect of the present invention, a plurality of tooth-shaped concavo-convex portions (2) are integrally formed on at least one end side in the width direction of the elongated base (1) by pressing a metal plate to form a band-shaped body (3 ) Forming a press process;
A folding step of folding the belt-like body (3) into each of the elements (4) at regular intervals in the longitudinal direction;
A compression process of compressing between the elements (4) and bringing the elements (4) into contact with each other for lamination, and a method for producing a fin for a heat exchanger.

According to a second aspect of the present invention, in the method for manufacturing a heat exchanger fin according to the first aspect,
The width in the longitudinal direction of the concave portion (2a) in the concave and convex portion (2) of the strip (3) is made larger than the width of the convex portion (2b), and the elements (4) in contact with each other are in one concave portion (2a). The heat exchanger fin manufacturing method includes the bending step of bending the belt-like body (3) so that the other convex portion (2b) is arranged in the overlapping direction.
According to a third aspect of the present invention, in the method of manufacturing a heat exchanger fin according to the first or second aspect,
This is a method for manufacturing a fin for a heat exchanger in which the convex part (2b) in the concave-convex part (2) of the strip (3) is formed in a trapezoidal shape.

According to a fourth aspect of the present invention, in the method for manufacturing a heat exchanger fin according to the first to third aspects,
In the pressing step, the bending recesses (5) linear in the width direction of the strip (3) at the bending position for each length of each element (4), the front side and the back side of the strip (3) And a heat exchanger fin manufacturing method that is formed alternately and made easy to bend.
The present invention according to claim 5 is the method for producing a heat exchanger fin according to any one of claims 1 to 4,
By pressing the metal plate, a large number of tooth-shaped irregularities (2) are integrally formed only on one end in the width direction of the elongated base (1) to form a strip (3), and each element (4 ), A notch (6) is formed in advance on the other end in the width direction of the base (1) at the folding position, and a protruding portion accompanying the folding is formed on the other end in the width direction during the folding process. This is a method for manufacturing a fin for a heat exchanger that prevents the occurrence of (7).

According to a sixth aspect of the present invention, in the method for producing a heat exchanger fin according to any one of the first to fifth aspects,
A method of manufacturing a fin for a heat exchanger, in which a strip-shaped body (3) is formed by integrally forming a large number of tooth-shaped uneven portions (2) on both ends in the width direction of a long and narrow base (1) by pressing a metal plate It is.
The present invention according to claim 7 is the method for producing a fin for a heat exchanger according to any one of claims 1 to 6,
This is a method for manufacturing a fin for a heat exchanger in which a partition part (4a) having no concavo-convex part (2) is interposed at an intermediate position in the stacking direction of the element (4).

  The present invention according to claim 8 is a fin for a heat exchanger manufactured by the manufacturing method according to any one of claims 1 to 7.

  According to a ninth aspect of the present invention, there is provided the heat exchanger fin according to the eighth aspect, wherein the heat exchanger fin is provided as an inner fin (8) in a flow path between the pair of plate-like plates (10) (11). It is an exchanger.

  The method for manufacturing a fin for a heat exchanger according to the present invention forms a strip 3 by integrally forming a large number of tooth-shaped irregularities 2 on a long and narrow base 1 by pressing a metal plate, and the strip 3 is elongated. Since the fins are manufactured by bending each element 4 at regular intervals in a direction and compressing between the elements 4, the fins are easy to manufacture, have high mass productivity, and can be provided at low cost. Further, since the folded bases 1 are in contact with each other to form fins, the fin pitch is accurately the thickness of the metal plate, the pitch management is easy, and the performance is compact and has a wide heat transfer area. It becomes a fin for heat exchangers. Furthermore, since the size and shape of the fin can be easily deformed depending on the position where the base 1 is bent and the number of times, it is easy to manufacture according to the size and application of the heat exchanger.

According to the method for manufacturing a heat exchanger fin according to claim 2, the width in the longitudinal direction of the concave portion 2a of the belt-like body 3 is made larger than the width of the convex portion 2b, and the other concave portion 2a between adjacent elements 4 In order to manufacture fins by bending the strip 3 so that the convex portions 2b are arranged in the overlapping direction, the heat absorbing medium circulates between the convex portions 2b in a meandering manner, and agitates the heat to exchange heat. Can be promoted.
According to the method for manufacturing a heat exchanger fin according to claim 3, since the convex part 2b of the band-like part 3 is formed in a trapezoidal shape, the tip part of the convex part 2b (near the inner surface of the plate on the heating element attaching side) A large amount of the heat absorption medium flows, and a small amount of the heat absorption medium flows in the root portion between the convex portion 2b and the base portion 1. Thereby, the heat can be effectively absorbed directly under the heating element, and the heat exchange performance can be improved.

According to the method for manufacturing a fin for a heat exchanger according to claim 4, since the linear bending concave portion 5 is provided in the width direction at the bending position of the strip 3 in the pressing process, the fin bending process is easily and accurately performed. It can be carried out.
According to the method for manufacturing a fin for a heat exchanger according to claim 5, since the notch portion 6 is formed in advance at the other end side in the width direction of the base portion 1 at the bending position of each element 4 by press working. During the process, it is possible to prevent the protrusion 7 from being generated at the other end in the width direction and to avoid interference with the plate adjacent to the fin.

According to the method for manufacturing a fin for a heat exchanger according to claim 6, since the concavo-convex portions 2 are integrally formed on both end sides in the width direction of the elongated base portion 1 to form the belt-like body 3, the heat transfer area is increased. And good heat exchange can be performed.
As in the method for manufacturing a heat exchanger fin according to claim 7, when a partition portion 4 a having no uneven portion 2 is interposed at an intermediate position in the stacking direction of the elements 4, the inside of the heat exchanger is circulated. The flow of the heat absorbing medium flowing can be efficiently rectified, and the flow rate of the heat absorbing medium flowing through each part can be made uniform.
And the heat exchanger using the fin manufactured by this manufacturing method as the inner fin 8 is easy to manufacture, has high mass productivity, can be manufactured at low cost, and the number of parts is minimized.

The disassembled perspective view which shows the heat exchanger provided with the fin for heat exchangers of this invention. The perspective view (A) which shows the process of manufacturing the fin, and the principal part perspective enlarged view (B). It is the front view of each Example of the fin, Comprising: (A) is the 1st Example, Comprising: The shape of a convex part (2b) is a rectangular thing, (B) is the 2nd Example. The convex part (2b) is trapezoidal, and (C) is the third embodiment, in which the convex part (2b) is formed at both ends in the width direction. It is explanatory drawing which forms the bending recessed part 5 of each said fin, Comprising: (A) is the front view, (B) is the bottom view, (C) is the notch part 6 for preventing protrusion formed in the lower part. FIG. The principal part expansion perspective view of the bending part of the fin. Explanatory drawing of the protrusion part in the case of not providing the notch part of FIG.4 (C). Explanatory drawing (A) which shows the flow of the heat absorption medium 14 of the heat exchanger using the fin which has a partition part, and explanatory drawing (B) of the manufacturing process of the fin. Explanatory drawing which shows the manufacturing process of the fin for heat exchangers of the further another example of this invention. Furthermore, explanatory drawing which shows the heat exchanger using the fin for heat exchangers of another example. Furthermore, explanatory drawing which shows the heat exchanger using the fin for heat exchangers of another example. Furthermore, explanatory drawing which shows the heat exchanger using the fin for heat exchangers of another example.

Next, each embodiment of the present invention will be described with reference to the drawings.
1 to 7 show a fin manufacturing method according to the first embodiment of the present invention and a heat exchanger using the same as the inner fin 8.

(First Example of Fin Manufacturing Method of the Present Invention)
In this heat exchanger fin, as shown in FIG. 2, first, a flat metal plate is press-molded to form a strip-shaped body 3 by integrally forming a large number of tooth-shaped irregularities 2 on an elongated base 1. . In this example, the convex portions 2b of the concavo-convex portion 2 are projected at regular intervals at one end edge of the base portion 1 in the width direction. In this example, as shown in FIG. 4A, the longitudinal width of the concave portion 2a of the belt-like body 3 is formed larger than the longitudinal width of the convex portion 2b. As will be described later, this heat exchanger fin has convex portions 2b arranged in a zigzag pattern, and the heat absorption medium circulates between the convex portions 2b in a meandering manner in accordance with the arrangement of the convex portions 2b of the fins. At this time, a width that is ½ of the difference between the concave portion 2a and the convex portion 2b becomes the flow path of the heat absorbing medium. Therefore, if the width is small, the flow resistance increases. On the other hand, even if the width is too large, the heat radiation area decreases.

  Therefore, the widths of the adjacent concave portion 2a and convex portion 2b are determined in consideration of the heat radiation area and the flow resistance. Further, the shape of the convex portion 2b can be a trapezoidal shape as shown in FIG. The trapezoidal convex portion 2b is difficult to manufacture by die casting or forging. However, when the fin flow path is formed by press molding, the basic band-like body 3 can be easily manufactured, and it can be bent into a thick inner fin. Moreover, it can replace with FIG. 3 (B) and can also make it a rectangle like FIG. 3 (A). Furthermore, as shown in FIG. 3C, the uneven portion 2 can be provided at both ends in the width direction of the base portion 1.

Next, as shown in FIG. 2, the strip 3 is folded at regular intervals at the position of the length of the element 4 that matches the flow direction length of the inner fin 8 of the heat exchanger described later. Further, as shown in FIG. 2 (B), the element 4 is crimped so as to come into contact with each other, and the other convex portion 2b is arranged in the overlapping direction in one concave portion 2a between adjacent elements 4. The heat exchanger fin shown in FIG. 2 is completed.
The convex portions 2b of the adjacent elements 4 are shifted from each other by a half pitch, and the respective convex portions 2b are arranged in a zigzag pattern.
In order to specify the bending position of the element 4, as shown in FIGS. 4 (A) and 4 (B), at the time of press molding, linear bending concave portions 5 are alternately formed on the front surface side and the back surface side in the width direction of the bending position. Provided. Thereby, bending can be made easy.

Further, in this example, as shown in FIG. 4C, the lower surface of the bent portion of the base portion 1 is recessed in a wedge shape, and when the bent portion is bent, a tapered notch portion 6 shown in FIG. 5 is formed. This is because the inner fin 8 is seated on the first plate 10 without causing the first plate 10 and the lower surface of the base 1 to interfere with each other by flattening the lower surface of the base 1. If the protruding portion 7 shown in FIG. 6 exists on the lower end surface of the base portion 1, the base portion 1 slightly floats from the first plate 10.
Next, as shown in FIG. 7 (B), a partition portion 4a in which the uneven portion 2 does not exist can be provided at a fixed position in the longitudinal direction of the strip 3. By having this partition part, the flow of the heat absorption medium which distribute | circulates the inside of a heat exchanger can be rectified.

(Heat exchanger using fins of the present invention)
As shown in FIG. 1, the heat exchanger fins are used as inner fins 8 and are installed in a main body 9 of a heat exchanger composed of a pair of dish-shaped first plate 10 and second plate 11. The first plate 10 and the second plate 11 form a dish-like flat concave portion having a flange portion on the outer periphery, and in this example, a pair of inlet / outlet pipes 12 are connected to both ends in the width direction at one end in the longitudinal direction. . And the manifold part 16 is provided in the width direction both sides of the flat recessed part of each 1st plate 10 and the 2nd plate 11, and the inner fin 8 is mounted between the pair of manifold parts 16. FIG. Accordingly, the width of the inner fin 8 is equal to the width of each plate excluding the pair of manifold portions 16. The ribs 15 of the inner fin 8 may be provided at the boundary between the manifold portion 16 and the placement portion of the inner fin 8. At this time, when the tapered notch 6 as shown in FIG. 5 is provided in the bent portion of the inner fin 8 and the rib 15 is provided in the first plate 10, the positioning becomes easy. The ridge line of each convex part 2b of the inner fin 8 coincides with the width direction of each plate. The lower surface of the inner fin 8 is in contact with the flat concave portion of the first plate 10, and the upper end surface of each convex portion 2 b of the inner fin 8 is in contact with the flat concave portion of the second plate 11. Then, the parts are assembled and the parts are brazed together in a furnace to complete the heat exchanger.

Then, the heat absorption medium 14 is caused to flow from one side of the inlet / outlet pipe 12 and is circulated in the width direction from one manifold portion 16 of the flat recess to the other manifold portion 16 via the inner fins 8. Spill it out of. At this time, as shown in FIG. 7A, the heat absorbing medium 14 circulates in a meandering manner between the convex portions 2b and the concave portions 2a in the width direction of the inner fin 8 from one end portion in the width direction. It flows out from the end.
That is, the heat absorbing medium 14 circulates in a meandering manner in the thickness direction. As the heat absorbing medium 14, for example, a gas-liquid two-phase refrigerant or cooling water is used. A heating element 13 is fixed in contact with the outer surface of the main body 9 of the heat exchanger, and the heat is transferred to the heat absorbing medium 14 to cool the heating element 13. In addition, when fixing the heat generating body 13 to both the outer surfaces of the main body 9 of the heat exchanger, heat exchange can be efficiently performed by using the fins of FIG.

(Second Embodiment of Fin Manufacturing Method of the Present Invention)
Next, FIG. 8 shows a second embodiment of the present invention, which differs from the inner fin 8 of FIG. 2 of the first embodiment in the position of the bent portion. As shown in the figure, the bent portion in this example is formed in a step shape in plan view.
Such an inner fin 8 is used as an example as shown in FIG. This can be used when the entire shape of the inner fin 8 is inclined to a parallelogram and the entrance / exit of the heat absorbing medium 14 is arranged at a diagonal position of the heat exchanger. If it does in this way, a heat absorption medium can fully be supplied also to a position far from an entrance, and heat exchange with good balance can be performed.
Further, as shown in FIG. 10, the planar shape of the fins can be a trapezoidal shape. Further, as shown in FIG. 11, both plates 9 and 10 are provided with a partitioning portion 17 to provide a two-pass heat exchanger. It can also be.

1 base 2 uneven part
2a Recess
2b Convex 3 Strip 4 Element
4a Partition part 5 Bending concave part 6 Concave part 7 Protruding part 8 Inner fin

9 Body
10 First plate
11 Second plate
12 Entrance pipe
13 Heating element
14 Heat absorption medium
15 Ribs
16 Manifold section
17 Partition

Claims (9)

A pressing step of forming a strip-shaped body (3) by integrally forming a large number of tooth-shaped irregularities (2) on at least one end side in the width direction of the elongated base (1) by pressing the metal plate,
A folding step of folding the belt-like body (3) into each of the elements (4) at regular intervals in the longitudinal direction;
A compression process of compressing the elements (4) and bringing the elements (4) into contact with each other for lamination, and a method for manufacturing a fin for a heat exchanger. In the manufacturing method of the fin for heat exchangers of Claim 1,
The width in the longitudinal direction of the concave portion (2a) in the concave and convex portion (2) of the strip (3) is made larger than the width of the convex portion (2b), and the elements (4) in contact with each other are in one concave portion (2a). A method for manufacturing a fin for a heat exchanger, wherein the bending step of bending the belt-like body (3) so that the other convex portion (2b) is arranged in the overlapping direction. In the manufacturing method of the fin for heat exchangers of Claim 1 or Claim 2,
A method for producing a fin for a heat exchanger, wherein the convex part (2b) of the concave-convex part (2) of the strip (3) is formed in a trapezoidal shape. In the manufacturing method of the fin for heat exchangers of Claims 1-3,
In the pressing step, the bending recesses (5) linear in the width direction of the strip (3) at the bending position for each length of each element (4), the front side and the back side of the strip (3) A method of manufacturing a fin for a heat exchanger that is alternately formed and made easy to bend. In the manufacturing method of the fin for heat exchangers in any one of Claims 1-4,
By pressing the metal plate, a large number of tooth-shaped irregularities (2) are integrally formed only on one end in the width direction of the elongated base (1) to form a strip (3), and each element (4 ), A notch (6) is formed in advance on the other end in the width direction of the base (1) at the folding position, and a protruding portion accompanying the bending on the other end in the width direction during the bending process. (7) A method of manufacturing a fin for a heat exchanger that prevents the occurrence of (7). In the manufacturing method of the fin for heat exchangers in any one of Claims 1-5,
A method of manufacturing a fin for a heat exchanger, in which a strip-shaped body (3) is formed by integrally forming a large number of tooth-shaped uneven portions (2) on both ends in the width direction of a long and narrow base (1) by pressing a metal plate . In the manufacturing method of the fin for heat exchangers in any one of Claims 1-6,
A method for manufacturing a fin for a heat exchanger in which a partition portion (4a) having no uneven portion is interposed at an intermediate position in the stacking direction of the elements (4).   The fin for heat exchangers manufactured by the manufacturing method in any one of Claims 1-7. A heat exchanger in which the heat exchanger fin according to claim 8 is interposed as an inner fin (8) in a flow path between a pair of plate-like plates (10) (11).

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