JP5901416B2 - Fin for heat exchanger, heat sink using the same, and method for manufacturing fin for heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger fin mainly used as a heat sink and a heat sink using the same.

A heat sink that cools 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.
In Patent Documents 1 and 2 below, a large number of plates are press-molded, and a punching plate having a frame portion on the outer periphery and a large number of slits formed on the inside via a manifold portion is made. And many punching plates are laminated | stacked and an end plate is arrange | positioned at the up-and-down both ends of the lamination direction. And a power transistor, an integrated circuit package, etc. are affixed on the end plate, and the refrigerant | coolant was distribute | circulated inside.

JP 2012-18966 A JP 2010-205981 A

The conventional heat sink 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.
Therefore, an object of the present invention is to provide a heat exchanger fin with a small number of parts and easy assembly, a heat sink using the same, and a manufacturing method thereof.

The present invention according to claim 1 is a fin for a heat exchanger formed by folding a metal plate at regular intervals, zigzag folding,
The folded top (1) and valley (2) form a continuous end (3) continuous in the ridge direction of the top (1),
A large number of openings (6) and non-openings only on each side wall surface (4) (5) consisting of a rising part and a falling part located between the top part (1) and the valley part (2). The parts (7) are alternately arranged in parallel in a plurality of rows apart from each other in the ridge line direction,
The openings (6) of the one and the other side wall surfaces (4) and (5) facing each other are arranged so as to be displaced from each other in the ridge line direction, and the openings (6) of the one side wall surface (4). ) Is opposed to the non-opening portion (7) of the other side wall surface (5), and both side edges (7a) of the non-opening portion (7) in the ridge line direction are located in the opening portion (6). ,
One end edge in the ridge line direction of any one of the side wall surfaces, and the other end edge of either one of the side wall surfaces open a notch (6a) where the non-opening portion (7) does not exist,
One of the side wall surfaces (4) and the other side wall surface (5) is in close contact with each other, and is a heat exchanger fin.

The present invention according to claim 2 uses the fin for a heat exchanger according to claim 1 as an inner fin (10),
Inner fins (10) are interposed so that the top (1) and the valley (2) are in contact with the inner surface of a flat and hollow heat exchanger body (9) having a refrigerant manifold (8) at the end. And the side wall surfaces (4) and (5) are arranged so as to intersect the manifold portion (8), the refrigerant flows in the direction of the side wall surfaces (4) and (5), and the outer surface of the heat exchanger body. A heat sink to which the heating element (11) is fixed in contact.

The invention according to claim 3 is the heat sink according to claim 2,
A side edge (7a) on the downstream side of the refrigerant in each opening (6) of the one and the other side wall surfaces (4) and (5) facing each other is formed into a convex chevron upstream and guided to the chevron And the refrigerant is guided to the top (1) and valley (2) side,
The heat sink is a heat sink in which the heating elements (11) are fixed in contact with both flat outer surfaces of the heat exchanger body (9).
The invention according to claim 4 is the heat sink according to claim 2,
A side edge (7a) on the downstream side of the refrigerant of each opening (6) of the opposing one and other side wall surfaces (4) and (5) is formed to be inclined to the downstream side and guided to the inclined edge. The refrigerant is led to one of the top (1) and the valley (2),
It is a heat sink in which the heating element (11) is contacted and fixed to the flat outer surface of the heat exchanger body (9), which is the outer surface that is led to the refrigerant.
In the present invention according to claim 5, when two orthogonal directions are X and Y, the metal plate (18) has a large number of openings (6) and non-openings (7) alternately in the X direction. A first aperture group a arranged at regular intervals is formed, and a second aperture group b in which the phase of each aperture is shifted by half a pitch in the X direction in the same aperture group as the first aperture group a Arranging adjacent to the Y direction of the aperture group, alternately arranging the first aperture group a and the second aperture group b in the Y direction,
At one end in the X direction, a notch (6a) having no non-opening portion (7) is opened at the end of one opening group, and at the other end in the X direction, the end of either opening group. A metal plate perforating step for opening the notched part (6a) in which no non-opening part (7) exists,
Next, the metal plate is folded in a zigzag manner at the boundary between the first opening group and the second opening group, and the top part (1) and the valley part (2) of the folding part are connected to the top part (1). Each side wall surface (4) (5) which forms a continuous end portion (3) continuous in the ridge line direction, and which consists of a rising portion and a falling portion located between the top portion (1) and the trough portion (2). And a folding step of bringing the two into close contact with each other.

In the fin for a heat exchanger of the present invention, the opposed side wall surfaces 4 and 5 of the metal plate which is folded in contact with each other. A number of openings 6 and non-openings 7 are alternately arranged in parallel on the side wall surfaces 4 and 5, and the openings 6 of the opposing side wall surfaces 4 and 5 are displaced from each other in the side wall surface direction. Therefore, the fluid can be circulated parallel to the side wall surfaces 4 and 5. And since each side wall surface 4 and 5 contacts, it becomes a fin for heat exchangers with a good performance with a compact and wide heat-transfer area. And since the side wall surfaces 4 and 5 which are turned back and come into contact with each other form fins, the fin pitch is accurately the thickness of the metal plate, and the pitch management is easy.
In addition, since the fin is formed by folding the metal plate, the number of parts is minimized, the manufacturing is easy, the mass productivity is high, and the fin can be provided at a low cost.
Also, the heat sink and fin manufacturing method using the fins as inner fins are easy to manufacture, have high mass productivity, and can be manufactured at low cost.
Furthermore, as in the invention described in claim 3 or claim 4, the side edge 7a on the downstream side of the refrigerant in each opening 6 of the side wall surfaces 4 and 5 is inclined to the upstream or to the downstream side. Thus, when the refrigerant is guided to the chevron or the slope and is guided to the flat outer surface side of the heat exchanger body 9, and the heating element 11 is contacted and fixed to the guided outer surface side, the heating element 11 is Cool more effectively.

The top view which shows the 1st process for manufacturing the fin for heat exchangers of 1st Example of this invention. Explanatory drawing of the 2nd process. The perspective schematic diagram of the fin. FIG. 3 is an exploded perspective view of a heat sink using the same fin as the inner fin 10. FIG. 3 is an explanatory diagram showing the flow of the refrigerant 14. VI-VI arrow sectional view of FIG. The top view of the metal plate 18 for manufacturing the fin for heat exchangers of 2nd Example of this invention. An explanatory view of a heat sink using the fin as the inner fin 10. The top view of the metal plate 18 for manufacturing the fin for heat exchangers of 3rd Example of this invention. An explanatory view of a heat sink using the fin as the inner fin 10. The top view of the metal plate 18 for manufacturing the fin for heat exchangers of 4th Example of this invention. An explanatory view of a heat sink using the fin as the inner fin 10. The top view of the metal plate 18 for manufacturing the fin for heat exchangers of 5th Example of this invention. An explanatory view of a heat sink using the fin as the inner fin 10. The top view of the metal plate 18 for manufacturing the fin for heat exchangers of 6th Example of this invention. An explanatory view of a heat sink using the fin as the inner fin 10. Explanatory drawing which shows the manufacturing method of the heat sink of the other Example of this invention.

Next, each embodiment of the present invention will be described with reference to the drawings.
1 to 6 show a fin manufacturing method according to the first embodiment of the present invention and a heat sink using the same as the inner fin 10.
First, as shown in FIG. 1, the heat exchanger fin is formed by press forming a large number of openings 6 and non-openings 7 in a metal plate 18 two-dimensionally in the X and Y directions, which are two orthogonal planes. The first opening group a and the second opening group b are alternately arranged in parallel in the Y direction via the belt-like portion 20. The opening 6 of the first opening group a and the opening 6 of the second opening group b are shifted from each other by a half pitch position in the X direction. And in this example, the notch part 6a which does not have a non-opening part is opened in the both ends of the X direction of the 2nd opening group b.

Next, as shown in FIG. 2, the metal plate 18 is folded at regular intervals in each band-shaped portion 20. Then, the side wall surfaces 4 and 5 are disposed between the folded top portion 1 and the trough portion 2. Furthermore, the side wall surfaces 4 and 5 are pressed in the Y direction so that they are in contact with each other, thereby completing the heat exchanger fin of FIG.
The heat exchanger fins are used as inner fins 10 and are installed in a heat exchanger main body 9 including a pair of first plates 9a and second plates 9b. The first plate 9a and the second plate 9b form a flat concave portion 19 leaving a flange portion on the outer periphery, and in this example, a pair of inlet pipe 12 and outlet pipe 13 are connected to one end in the longitudinal direction. And the manifold part 8 is provided in the width direction both sides of the flat recessed part 19 of each 1st plate 9a and the 2nd plate 9b, and between components is brazed integrally, and a heat sink is completed.

Then, the refrigerant 14 is caused to flow from the inlet pipe 12, the refrigerant 14 is circulated through the inner fin 10 from the manifold portion 8 at one end of the flat recess 19 to the manifold portion 8 at the other end, and flows out from the outlet pipe 13. At this time, as shown in FIG. 5, the refrigerant 14 flows from one end of the inner fin 10 in the width direction to the other end. As can be seen from the figure, the non-opening 7 of the other side wall surface 5 adjacent to the other side wall surface 5 is projected in the opening 6 of one side wall surface 4. Then, both edges of the non-opening 7 are located in the opening 6. Similarly, the non-opening portion 7 of one side wall surface 4 is disposed in the opening 6 of the other side wall surface 5.
Then, as shown in FIG. 6, the refrigerant 14 flows in from the notched portion 6a of the other side wall surface 5, and the opening 6 of the one side wall surface 4 and the opening 6 of the other side wall surface 5 are in the plate thickness direction. It circulates in a meandering manner. As the refrigerant 14, for example, a gas-liquid two-phase refrigerant or cooling water is used. A heating element 11 is fixed in contact with the outer surface of the heat exchanger main body 9, the generated heat is transmitted to the refrigerant 14, and the heating element 11 is cooled.

Next, FIGS. 7 and 8 show a second embodiment of the present invention, which is different from FIGS. 1 and 6 of the first embodiment only in the shape of the four corners of the opening 6.
In the first embodiment, the opening 6 is formed in a complete square, but in FIG. 7, the difference is that the corner of the square is formed in an arc shape.

Next, FIGS. 9 and 10 show a third embodiment of the present invention. In this example, the downstream edge in the flow direction of the refrigerant 14 in the opening 6 has a chevron side edge 7a formed in a chevron. There are features.
When the metal plate 18 is folded in a zigzag manner, as shown in FIG. 10, the non-opening 7 having the chevron side edge 7a is projected onto the opening 6 on the adjacent side wall in the form of a home base. Then, the refrigerant is guided to the chevron of the side edge 7a and guided to both sides of the top 1 and the trough 2 of the fin. On both sides thereof, there are flat outer surfaces of the heat exchanger main body 9, and the heating elements 11 are fixed in contact with both outer surfaces. Therefore, more refrigerant is guided to the side of the heating element 11 and cools the heating element 11 more effectively.

  Next, FIGS. 11 and 12 show a fourth embodiment of the present invention. In this example, the opening 6 is formed into an irregular trapezoidal opening 6f. The side edge 7a on the downstream side of the refrigerant in each of the opening portions 6 of the one and the other side wall surfaces 4 and 5 is formed so as to be inclined to the downstream side, and is guided by the inclined edge to be on the valley 2 side of the fin. The refrigerant is led to The heating element 11 is contacted and fixed to the outer surface of the heat exchanger body 9 on the side where the refrigerant is guided, and heat exchange is promoted. When the inclined edge is reversed, the heating element 11 is attached on the upper side in the drawing.

  FIGS. 13 and 14 show a fifth embodiment of the present invention. In this example, each opening 6 is formed in a trapezoidal opening 6f, and an N-shaped opening is formed in the middle of the first opening group a. A portion 6b is formed, and an inclined opening 6c is formed in the middle portion of the second opening group b.

  Next, FIGS. 15 and 16 show a sixth embodiment of the present invention. In this example, a rectangular opening 6 and a horizontally long opening 6d are arranged in the Y direction in the first opening group a and the second opening group b, respectively. In parallel with the two rows, the laterally long opening in the middle forms an L-shaped opening 6e. As shown in FIG. 16, the refrigerant 14 circulates through the upper opening 6 and the lower horizontal opening 6d, and the upper and lower refrigerants 14 are mixed and divided in the L-shaped opening 6e.

Next, in FIG. 17, in order to make the bent portion of the metal plate 18 flatter, the notch portions 17 are alternately press-formed on the front surface and the back surface at a constant pitch interval, and the bent portions 17 are bent. Is. Thereby, the top part 1 and the trough part 2 can be made more flat.
Although the fin of the said Example was demonstrated as a use of the heat sink which cools a heat generating body, it can also be utilized for heat exchangers, such as an oil cooler, a radiator, and an intercooler.

DESCRIPTION OF SYMBOLS 1 Top part 2 Valley part 3 Continuous edge part 4 Side wall surface 5 Side wall surface 6 Opening part
6a Notch
6b N-shaped opening
6c Inclined opening
6d Horizontal opening
6e L-shaped opening
6f trapezoidal opening

7 Non-opening
7a Side edge 8 Manifold part 9 Heat exchanger body
9a First plate
9b Second plate
10 Inner fin
11 Heating element
12 inlet pipe
13 Outlet pipe

14 Refrigerant
15 ridge
16 inclined edges
17 Notch
18 Metal plate
19 Flat recess
20 Band-shaped part a 1st opening group b 2nd opening group

Claims (5)

In the fins for heat exchangers that are folded back and folded at regular intervals, in a zigzag manner,
The folded top (1) and valley (2) form a continuous end (3) continuous in the ridge direction of the top (1),
A large number of openings (6) and non-openings only on each side wall surface (4) (5) consisting of a rising part and a falling part located between the top part (1) and the valley part (2). The parts (7) are alternately arranged in parallel in a plurality of rows apart from each other in the ridge line direction,
The openings (6) of the one and the other side wall surfaces (4) and (5) facing each other are arranged so as to be displaced from each other in the ridge line direction, and the openings (6) of the one side wall surface (4). ) Is opposed to the non-opening portion (7) of the other side wall surface (5), and both side edges (7a) of the non-opening portion (7) in the ridge line direction are located in the opening portion (6). ,
One end edge in the ridge line direction of any one of the side wall surfaces, and the other end edge of either one of the side wall surfaces open a notch (6a) where the non-opening portion (7) does not exist,
One of the side wall surfaces (4) and the other side wall surface (5) is in close contact with each other, and is a fin for a heat exchanger. The heat exchanger fin according to claim 1 is used as an inner fin (10),
Inner fins (10) are interposed so that the top (1) and the valley (2) are in contact with the inner surface of a flat and hollow heat exchanger body (9) having a refrigerant manifold (8) at the end. And the side wall surfaces (4) and (5) are arranged so as to intersect the manifold portion (8), and the refrigerant flows in the direction of the side wall surfaces (4) and (5), so that the heat exchanger body (9 A heat sink in which the heating element (11) is fixed in contact with the outer surface. The heat sink according to claim 2,
A side edge (7a) on the downstream side of the refrigerant in each opening (6) of the one and the other side wall surfaces (4) and (5) facing each other is formed into a convex chevron upstream and guided to the chevron And the refrigerant is guided to the top (1) and valley (2) side,
A heat sink in which the heating elements (11) are fixed in contact with both flat outer surfaces of the heat exchanger body (9). The heat sink according to claim 2,
A side edge (7a) on the downstream side of the refrigerant of each opening (6) of the opposing one and other side wall surfaces (4) and (5) is formed to be inclined to the downstream side and guided to the inclined edge. The refrigerant is led to one of the top (1) and the valley (2),
A heat sink in which the heating element (11) is contacted and fixed to the flat outer surface of the heat exchanger main body (9), the outer surface being led to the refrigerant. A first opening group in which a number of openings (6) and non-openings (7) are alternately arranged at regular intervals in the X direction on the metal plate (18), where two orthogonal directions are X and Y. and a second aperture group b having the same aperture group as the first aperture group a, the phase of each aperture being shifted by a half pitch in the X direction, and being adjacent to the Y direction of the first aperture group The first opening group a and the second opening group b are alternately arranged in the Y direction,
At one end in the X direction, a notch (6a) having no non-opening portion (7) is opened at the end of one opening group, and at the other end in the X direction, the end of either opening group. A metal plate perforating step for opening the notched part (6a) in which no non-opening part (7) exists,
Next, the metal plate is folded in a zigzag manner at the boundary between the first opening group a and the second opening group b, and the top part (1) and the valley part (2) of the return part are the top part (1 ) In the direction of the ridge line is formed, and each side wall surface (4) consisting of a rising portion and a falling portion located between the top portion (1) and the trough portion (2). And (5) a bending step of bringing the two into close contact with each other, and a method for producing a fin for a heat exchanger.

Images