JP2018032823A - Radiation fin and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiation fin of easy assembly, having a fin deformation hard to occur.SOLUTION: The radiation fin, which includes a base member arranged to contact to a heat member, and a plurality of thin tabular fins attached to the base member at predetermined intervals, dissipates heat to a heat exchange fluid flowing among the plurality of fins to thereby cool the heat member. A plurality of fins are formed to have inflow side fin parts disposed from the inflow side of the heat exchange fluid, and offset fin parts having offsets from the flow of the heat exchange fluid in the vertical direction with intervals smaller than a predetermined interval in the downstream side of the inflow side fin parts. Also, the plurality of fins are formed to couple the inflow side fin parts with the offset fin parts at the attachment end parts on the base member side and the tip end part on the opposite side to the attachment end parts. This enables easy assembly of each radiation fin with the suppressed deformation of the fin.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a radiating fin and a method of manufacturing the radiating fin, and more specifically, a radiating fin having a base member disposed in contact with a heat member and a plurality of thin plate-like fins attached to the base member at predetermined intervals, and the radiating fin. It relates to the manufacturing method.

  Conventionally, as this type of technology, there has been proposed a heat sink in which a fin unit for conducting heat transfer to a cooling fluid is provided on a base plate to which heat-generating components are thermally connected (for example, Patent Documents). 1). The fin unit of the heat sink includes a first fin group in which a plurality of plate-like fins are arranged on the base plate surface at predetermined intervals and are erected on the base plate in parallel with each other, and a first fin group downstream from the first fin group. And a second fin group erected in the same manner as the first fin group at a position slightly offset laterally. This heat sink has such a fin unit, so that the pressure loss generated when the cooling fluid flows can be suppressed as small as possible.

JP 2012-28361 A

  The above heat sink requires time for assembly because the fins of the first fin group and the second fin group are erected on the base plate surface. Further, when a fin is formed using a thin plate, although depending on the length of the fin, the fin is deformed only by applying a slight force, and desired performance cannot be obtained.

  The main object of the heat dissipating fin of the present invention is to provide a heat dissipating fin that is easy to assemble and is difficult to deform. The manufacturing method of the radiation fin of this invention aims at providing the manufacturing method of the radiation fin which is easy to assemble and cannot deform | transform a fin easily.

  The heat dissipating fin and the manufacturing method thereof according to the present invention employ the following means in order to achieve the above-mentioned main object.

The heat radiation fin of the present invention is
A base member disposed in contact with the heat member and a plurality of thin plate-like fins attached to the base member at a predetermined interval, and dissipating heat to the heat exchange fluid flowing between the plurality of fins. A heat dissipating fin for cooling the heat member by:
The plurality of fins include an inflow side fin portion from an inflow side of the heat exchange fluid, and a direction perpendicular to the flow of the heat exchange fluid with respect to the inflow side fin portion at a downstream side of the inflow side fin portion. An offset fin portion offset by an interval smaller than the predetermined interval,
The inflow side fin portion and the offset fin portion are connected at the mounting end portion on the base member side and the tip end portion on the opposite side to the mounting end portion,
It is characterized by that.

  In the radiating fin of the present invention, the plurality of fins are perpendicular to the flow of the heat exchange fluid with respect to the inflow side fin portion from the inflow side of the heat exchange fluid and the inflow side fin portion downstream from the inflow side fin portion. And an offset fin portion offset in the direction by an interval smaller than a predetermined interval. Accordingly, the heat exchange fluid flows between the inflow side fin portions arranged at a predetermined interval, and flows between the offset fin portions arranged at a predetermined interval with an offset smaller than the predetermined interval from the inflow side fin portion. Since the temperature rise of the heat exchange fluid becomes larger in the vicinity of the fins, the degree of the temperature rise of the heat exchange fluid can be increased and the heat dissipation performance can be improved by having the inflow side fin portion and the offset fin portion. Can do. Since the inflow side fin portion and the offset fin portion are connected by the mounting end on the base member side and the tip end opposite to the mounting end, the inflow side fin portion and the offset fin portion are connected to another fin. As compared with the case, the assembly can be facilitated. In addition, since the inflow side fin portion and the offset fin portion are connected at the attachment end portion and the tip end portion, the deformation of the fin is less than when the inflow side fin portion and the offset fin portion are separate fins. Can be suppressed. As a result, it is possible to obtain a radiating fin that is easy to assemble and is difficult to deform the fin.

  In the radiating fin of the present invention, the offset fin portion may be offset from the inflow side fin portion by half of the predetermined interval. In this way, the offset fin portion can be arranged at the center of the inflow side fin portion of the adjacent fin.

  Further, in the heat dissipating fin of the present invention, the offset fin portion includes a first offset fin portion that is offset from the inflow side fin portion by ３ of the predetermined interval, and the predetermined fin on the downstream side of the first offset fin portion. A second offset fin portion offset to the opposite side of the first offset fin portion by 1/3 of the interval may be included. In this way, from the upstream side of the heat exchange fluid, the inflow side fin portions arranged at a predetermined interval, the first offset fin portions arranged at a predetermined interval by being offset by one third of the predetermined interval, and 1/3 of the predetermined interval It is possible to provide a heat radiating fin having first offset fin portions that are offset to the other side and arranged at a predetermined interval.

  Furthermore, in the heat radiating fin of the present invention, the plurality of fins may be joined by a plurality of protrusions formed on adjacent fins. In this way, since the adjacent fins are joined by the projection, the rigidity of the fin can be increased and the deformation of the fin can be further suppressed.

  In the heat dissipating fin of the present invention, the plurality of fins may be formed in a zigzag shape with the attachment end portion and the tip end portion being bent portions. In this way, since the plurality of fins are integrated, the attachment of the plurality of fins to the base member can be facilitated as compared with the case where the plurality of fins are not integrated.

  In the heat dissipating fin of the present invention, the plurality of fins may be connected at the tip portion. If it carries out like this, deformation | transformation of the front-end | tip part of a some fin etc. can be suppressed.

  In the heat dissipating fin of the present invention, the plurality of fins may be formed such that the inflow side fin portion protrudes to the upstream side in the flow of the heat exchange fluid as it is located at the center. In this way, since the inflow fin portion of the fin located at the center distributes the heat exchange fluid to the side, more heat exchange fluid is distributed to the side fins than when fins that do not protrude upstream are used. can do.

The manufacturing method of the heat dissipation fin of the present invention is as follows:
A base member disposed in contact with the heat member and a plurality of thin plate-like fins attached to the base member at a predetermined interval, and dissipating heat to the heat exchange fluid flowing between the plurality of fins. A method of manufacturing a heat radiating fin that cools the heat member by:
With respect to a single plate material, the inflow side fin portion on the inflow side of the heat exchange fluid and the downstream side of the inflow side fin portion in a direction perpendicular to the flow of the heat exchange fluid with respect to the inflow side fin portion. The inflow side fin portion and the offset fin portion are connected at the mounting end portion on the base member side and the tip end portion on the opposite side to the mounting end portion. A plurality of fins are connected to the mounting end of the adjacent fin by the mounting side connecting portion over the plurality of fins, and the tip end is connected to the tip end of the adjacent fin by the leading end side connecting portion. A first step of forming a continuous fin member,
A second step of forming the continuous fin member into a bent fin member by bending the attachment-side connecting portion and the tip-side connecting portion so that the interval between the plurality of fins is the predetermined interval;
A third step of attaching the bent fin member so that the attachment end is fixed to the base member;
It is characterized by providing.

  In the method of manufacturing a heat radiating fin according to the present invention, the plurality of fins attached to the base member at a predetermined interval are the inflow side fin portion on the inflow side of the heat exchange fluid and the inflow side fin portion on the downstream side of the inflow side fin portion. An offset fin portion that is offset by a distance smaller than a predetermined interval in the direction perpendicular to the flow of the heat exchange fluid, and the inflow side fin portion and the offset fin portion are opposite to the attachment end on the base member side and the attachment end. In the first step, a plurality of such fins are connected to a mounting end of a fin adjacent to a single plate member by a mounting side connecting portion. A continuous fin member is formed in which the tip portion is connected to the tip portion of the adjacent fin by the tip side connecting portion. Next, in the second step, the continuous fin member formed in the first step is bent into the attachment-side connecting portion and the tip-side connecting portion so that the intervals between the plurality of fins become a predetermined interval, thereby forming a bent fin member. In the third step, the bent fin member formed in the second step is attached so that its attachment end is attached and fixed to the base member. That is, an integrated continuous fin member is formed on a single plate member, and is bent to form an integrated bent fin member, and the integrated bent fin member is attached to the base member. As described above, since the plurality of fans are formed as integral bent fin members and attached to the base member, it can be easily assembled as compared with the case where the plurality of fins are individually attached to the base member. Moreover, since each fin has an inflow side fin part and an offset fin part, a heat radiating fin with high heat dissipation performance can be manufactured. Moreover, since the inflow side fin portion and the offset fin portion are connected at the attachment end portion and the tip end portion, the assembly is easier than when the inflow side fin portion and the offset fin portion are separate fins. Can be. As a result, it is possible to provide a method for manufacturing a radiating fin that is easy to assemble and is difficult to deform the fin.

  In such a method of manufacturing a heat radiating fin of the present invention, the first step is a step of forming the continuous fin member such that the offset fin portion is offset to the opposite side of the offset fin portion of an adjacent fin, The second step may be a step of forming the bent fin member by bending the continuous fin member into a zigzag shape. If it carries out like this, a bending fin member can be obtained only by bending a continuous fin member in a zigzag form, and a bending fin member can be formed easily.

  In the method of manufacturing a heat radiating fin according to the present invention, the first step uses the clad plate material in which a second metal having a melting point lower than that of the first metal is bonded to both surfaces to a central material made of the first metal. Forming a member, wherein the third step is performed by placing the bent fin member in a furnace having a temperature higher than the melting point of the second metal and lower than the melting point of the first metal in a state of being attached to the base member. It can also be a process of brazing. If it carries out like this, a bending fin member can be attached and fixed to a base member only by putting in a furnace in the state which attached the bending fin member to the base member.

It is explanatory drawing which shows the plane of the cooling device 20 which has the radiation fin 22 as one Example of this invention. It is explanatory drawing which shows the side which looked at the cooling-and-cooling apparatus 20 of FIG. 1 from the right side in the figure. It is explanatory drawing which expands and shows the side and the part which looked at the outline of the radiation fin 22 of FIG. 1 from the lower side in the figure. It is explanatory drawing which shows the cross section of the AA surface in the radiation fin 22 of FIG. 1 and FIG. It is process drawing which shows an example of the manufacturing process of the radiation fin 22 of an Example. It is explanatory drawing which shows an example of a continuous fin member. It is explanatory drawing which shows an example of a mode that the continuous fin member is bent.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is an explanatory view showing a plan view of a cooling device 20 having radiating fins 22 as one embodiment of the present invention, and FIG. 2 shows a side view of the cooling / cooling device 20 of FIG. 1 viewed from the right side in the drawing. It is explanatory drawing. FIG. 3 is an explanatory view showing an enlarged side view and a part of the side view of the radiating fin 22 shown in FIG. 1 as viewed from the lower side in the drawing. FIG. It is explanatory drawing which shows the cross section of -A surface.

  The cooling device 20 of the embodiment is configured as a device that cools the thermal member 12 on which a heating element such as a CPU is mounted, and the cooling fins 22 attached to the thermal member 12 and the cooling fins 22 are supplied with cooling air. A centrifugal fan 90 for blowing air. The centrifugal fan 90 is configured as a well-known centrifugal fan, and drives a fan 94 attached to the motor 92 to drive a suction port 96 formed around the motor 92 from the front side to the back side in FIG. The air sucked inward is blown toward the heat radiating fins 22 from the air blowing port 98 provided on the upper side in FIG.

  The heat radiating fins 22 include a rectangular parallelepiped base member 24 having a rectangular cross section that is fixed in contact with the heat member 12, and fin members 30 that function as a plurality of fins that are attached and fixed to the base member 24. The base member 24 and the fin member 30 are formed of a metal having good thermal conductivity (for example, aluminum, copper, stainless steel, etc.). In the embodiment, the base member 24 is made of aluminum, and the fin member 30 is a clad plate material made of aluminum having a thickness of 0.2 mm (a brazing material such as an aluminum silicon alloy is arranged on both surfaces of the aluminum plate material). And a plate material formed by rolling together.

  As shown in FIG. 3, the fin member 30 includes eight fins 32a to 32h having substantially the same shape, and mounting side connecting portions 72, 74, 76, 78 on the base member 24 side (left side in FIG. 3). It is connected by tip side connecting parts 73, 75, 77 on the opposite side (right side in FIG. 3) to the attachment side connecting parts 72, 74, 76, 78, and the interval between the centers of adjacent fins is a predetermined distance L (implemented). In the example, it is formed in a zigzag shape so as to be 1.2 mm. As shown in FIG. 1, the fins 32 a to 32 h are connected to the inflow side fin portions 40 a to 40 h and the inflow side fin portions 40 a to 40 h from the air outlet 98 side (lower side in FIG. 1) of the centrifugal fan 90. The first offset fin portions 50a to 50h offset by 3 to the front surface side in FIG. 1 (upper side in FIG. 3) and the back side in FIG. 1 by L / 3 from the inflow side fin portions 40a to 40h (lower side in FIG. 3) The second offset fin portions 60a to 60h are offset. In this way, the fins 32a to 32h are made to have the inflow side fin portions 40a to 40h, the first offset fin portions 50a to 50h offset by L / 3 on the front surface side in the drawing, and only L / 3 on the back surface side in the drawing. By comprising with the offset 2nd offset fin part 60a-60h, the heat dissipation effect is improved compared with the case where it is not offset.

  As shown in FIG. 1, attachment end portions 42a to 42h on the base member 24 side of the inflow side fin portions 40a to 40h are connected to attachment end portions 52a to 52h of the first offset fin portions 50a to 50h. The front end portions 44a to 44h opposite to the base member 24 side of the side fin portions 40a to 40h are connected to the front end portions 54a to 54h of the first offset fin portions 50a to 50h. As shown in FIG. 1, the attachment end portions 52a to 52h of the first offset fin portions 50a to 50h are connected to the attachment end portions 62a to 62h of the second offset fin portions 60a to 60h, and the first offset fin portion The tip portions 54a to 54h of 50a to 50h are connected to the tip portions 64a to 64h of the second offset fin portions 60a to 60h. That is, the inflow side fin portions 40a to 40h, the first offset fin portions 50a to 50h, and the second offset fin portions 60a to 60h are the attachment end portions 42a to 42h, the attachment end portions 52a to 52h, and the attachment end portions 62a to 62h. And tip ends 44a to 44h, tip portions 54a to 54h, and tip portions 64a to 64h. Thus, the deformation | transformation of each fin 32a-32h is suppressed by connecting inflow side fin part 40a-40h, 1st offset fin part 50a-50h, and 2nd offset fin part 60a-60h by both ends. Can do.

  As shown in FIG. 1, the inflow side fin portions 40a, 40c, 40e, and 40g have two protrusions 46a, 46c, 46e, 46g, 48a, which protrude by a length (L-thickness) in the rear surface direction. 48c, 48e, and 48g are formed, and are in contact with and joined to the inflow side fin portions 40b, 40d, 40f, and 40h adjacent to the back surface side in the drawing. Further, the inflow side fin portions 40b, 40d, and 40f are formed with projections 47b, 47d, and 47f that protrude by a length (L-thickness) in the rear surface direction in the drawing, as indicated by broken lines in the drawing. The inflow side fin portions 40c, 40e, and 40g adjacent to the back side in the figure are in contact with and joined to each other. Accordingly, the inflow-side fin portions 40a to 40h are arranged at two locations with a predetermined distance L from the adjacent inflow-side fin portions 46a, 46c, 46e, 46g, 48a, 48c, 48e, 48g or one projection 47b, 47d, It is joined by 47f. The first offset fin portions 50a, 50c, 50e, and 50g are formed with protrusions 57a, 57c, 57e, and 57g protruding in the back surface direction by a length (L-plate thickness), and on the back surface side in the drawing. The first offset fin portions 50b, 50d, 50f, and 50h adjacent to each other are abutted and joined. Further, the first offset fin portions 50b, 50d, and 50f include two protrusions 56b, 56d, 56f, which protrude by a length length (L-plate thickness) in the rear surface direction in the drawing, as indicated by broken lines in the drawing. 58b, 58d, and 58f are formed and are in contact with and joined to the first offset fin portions 50c, 50e, and 50g adjacent to the back surface side in the drawing. Accordingly, the first offset fin portions 50a to 50h have one projection 57a, 57c, 57e, 57g or two projections 56b, 56d, 56f, 58b, 58d, with a predetermined distance L from the adjacent first offset fin portion. Joined by 58f. Similarly to the inflow side fin portions 40a, 40c, 40e, and 40g, the second offset fin portions 60a, 60c, 60e, and 60g have two protrusions 66a that protrude by a length (L-plate thickness) in the rear surface direction in the drawing. , 66c, 66e, 66g, 68a, 68c, 68e, 68g are formed and are in contact with and joined to the second offset fin portions 60b, 60d, 60f, 60h adjacent to the back side in the drawing. Further, as shown by the broken lines in the figure, the second offset fin parts 60b, 60d, and 60f are formed with protrusions 67b, 67d, and 67f that protrude by a length (L-thickness) in the rear surface direction in the figure. , The second offset fin portions 60c, 60e, 60g adjacent to the back side in the drawing are in contact with and joined. Therefore, the second offset fin portions 60a to 60h have two protrusions 66a, 66c, 66e, 66g, 68a, 68c, 68e, 68g or one protrusion 67b with a predetermined distance L from the adjacent second offset fin portion. Joined by 67d and 67f. Thus, the adjacent fins 32a to 32h are joined at a predetermined interval L at two or one place in each fin portion. As a result, the deformation of the fins 32a to 32h can be suppressed.

  As shown in FIG. 4, the inflow side fin portions 40a to 40h are centrifugally separated by a length 2P compared to the inflow side fin portions 40a and 40h in which the central inflow side fin portions 40d and 40e are arranged at the upper and lower ends in the drawing. It is formed so as to extend to the fan 90 side (left side in FIG. 4), and the inflow side fin portions 40b, 40c, 40f, and 40g on both sides thereof have a length P compared to the inflow side fin portions 40a and 40h. It is formed to extend to the centrifugal fan 90 side (left side in FIG. 4). In other words, the inflow side fin portions 40a to 40h are formed so as to protrude toward the upstream side in the flow of the cooling air as it is located at the center. This is arranged on both sides even when the width of the blower port 98 of the centrifugal fan 90 (the vertical width in FIG. 2) is smaller than the width of the fin member 30 (the vertical width in FIGS. 2 to 4). This is because the cooling air is supplied to the inflow side fin portions 40a and 40h. That is, the cooling air from the air blowing port 98 flows also in both side directions by the central inflow side fin portions 40d and 40e, and the inflow side fin portions 40c and 40f, the inflow side fins 40b and 40g, and the inflow side fin portion 40a. , 40h and so on. As a result, the cooling air from the air blowing port 98 can be supplied to the inflow side fin portions on both sides as compared with the case where the inflow side fin portions have the same length.

  Next, how the radiating fins 22 of the embodiment are manufactured will be described. FIG. 5 is a process diagram illustrating an example of a manufacturing process of the heat dissipating fins 22 of the embodiment. The manufacture of the heat radiating fins 22 is completed by separately forming the base member 24 and the fin member 30 (step S100 and step S200), and brazing the base member 24 and the fin member 30 (step S300). In the embodiment, the base member 24 is formed by forming an aluminum partition.

  The fin member 30 is first formed on a clad plate material made of aluminum having a thickness of 0.2 mm (a plate material formed by integrally rolling a brazing material such as an aluminum silicon alloy on both sides of an aluminum plate material). By press working or the like, the fin 32a, the attachment side connecting portion 72, the fin 32b, the tip side connecting portion 73, the fin 32c, the attachment side connecting portion 74, the fin 32d, the tip side connecting portion 75, the fin 32e, the attachment side connecting portion 76, One continuous fin member connected in the order of the fin 32f, the tip side connecting portion 77, the fin 32g, the attachment side connecting portion 78, and the fin 32h is formed (step S110). FIG. 6 shows an example of the continuous fin member. 6A is a plan view of the continuous fin member, and FIG. 6B is a cross-sectional view of the BB plane of FIG. 6A (cross-sectional view of the inflow side fin portions 40a to 40h). 6 (c) is a cross-sectional view of the CC plane of FIG. 6 (a) (cross-sectional view of the first offset fin portions 50a to 50h), and FIG. 6 (d) is a DD plane of FIG. 6 (a). It is sectional drawing (sectional drawing of 2nd offset fin part 60a-60h). In FIGS. 6B to 6D, the offset amount is emphasized in order to facilitate the understanding of the offset of the first offset fin portions 50a to 50h and the second offset fin portions 60a to 60h. Is not consistent. In the continuous fin member, the inflow side fin portions 40a to 40h are the same except for the protrusions 46a, 46c, 46e, 46g, 47b, 47d, 47f, 48a, 48c, 48e, and 48g, as shown in FIG. It forms so that it may become a plane. Further, the protrusions 46a, 46c, 46e, 46g, 48a, 48c, 48e, 48g of the inflow side fin portions 40a, 40c, 40e, 40g are formed so as to protrude upward in FIG. The protrusions 47b, 47d, and 47f of the portions 40b, 40d, and 40f are formed so as to protrude downward in FIG. 6B. As shown in FIG. 6C, the first offset fin portions 50a to 50h are formed so that the first offset fin portions 50a, 50c, 50e, and 50g are offset downward in FIG. 6C. The first offset fin portions 50b, 50d, 50f, and 50h are formed so as to be offset upward in FIG. 6C. Further, the protrusions 57a, 57c, 57e, and 57g of the first offset fin portions 50a, 50c, 50e, and 50g are formed so as to protrude upward in FIG. 6C, and the first offset fins 50b, 50d, and 50f The protrusions 56b, 56d, 56f, 58b, 58d, and 58f are formed so as to protrude downward in FIG. 6C. As shown in FIG. 6 (d), the second offset fin portions 60a to 60h are formed so that the second offset fin portions 60a, 60c, 60e, and 60g are offset to the upper side in FIG. 6 (d). The two offset fin portions 60b, 60d, 60f, 60h are formed so as to be offset downward in FIG. 6 (d). Further, the protrusions 66a, 66c, 66e, 66g, 68a, 68c, 68e, and 68g of the second offset fin portions 60a, 60c, 60e, and 60g are formed so as to protrude upward in FIG. The protrusions 67b, 67d, 67f of the offset fins 60b, 60d, 60f are formed so as to protrude downward in FIG. 6 (d).

  Such a continuous fin member forms the fin member 30 by bending the end portions of the attachment side connection portions 72, 74, 76, 78 and the front end side connection portions 73, 75, 77 so as to form a zigzag shape as a whole (step S120). ). FIG. 7 shows a cross section of the first offset fin portions 50a to 50h as an example of a cross section of the bent state of the continuous fin member. As shown in the drawing, the first offset fin portions 50a to 50h are offset in the same direction when bent in a zigzag manner. As the continuous fin member, the first offset fin portions 50a to 50h and the second offset fin portions 60a to 60h are formed so as to be alternately offset in the vertical direction when the first offset fin portions 50a to 50h are folded in a zigzag manner. This is because 50h and the second offset fin portions 60a to 60h are offset in the same direction.

  In the step S300, the base member 24 and the fin member 30 are brazed by the attachment side connecting portions 72, 74, 76, 78 of the fin member 30 contacting the base member 24 and the protrusions formed on the fin member 30 being changed. As a state of contacting the fin portion, it is carried out by putting in a furnace and then cooling. As the furnace temperature, a temperature lower than the melting point of aluminum and higher than the melting point of the aluminum silicon alloy used as the brazing material is used. Since the fin member 30 is formed of an aluminum clad plate material, the contact portions of the attachment side connecting portions 72, 74, 76, and 78 of the fin member 30 with the base member 24 are joined to the base member 24. At the same time, each protrusion formed on the fin member 30 is joined to each fin portion.

  In the heat radiation fin 22 of the embodiment described above, the first offset fin portions 50a to 50h in which the fins 32a to 32h are offset by L / 3 from the inflow side fin portions 40a to 40h and the inflow side fin portions 40a to 40h, The inflow side fin portions 40a to 40h are formed to include second offset fin portions 60a to 60h that are offset by L / 3 on the side opposite to the first offset fin portions 50a to 50h, and the inflow side fin portions 40a to 40h. 40h, 1st offset fin part 50a-50h, and 2nd offset fin part 60a-60h are attachment end part 42a-42h, 52a-52h, 62a-62h and front-end | tip part 44a-44h, 54a-54h, 64a-64h. It is formed to be connected. For this reason, compared with the case where the inflow side fin part, the 1st offset fin part, and the 2nd offset fin part are not connected, the deformation | transformation of each fin 32a-32h can be suppressed. Of course, since the first offset fin portions 50a to 50h offset by L / 3 from the inflow side fin portions 40a to 40h and the second offset fin portions 60a to 60h offset by L / 3 on the opposite side are provided, the heat dissipation efficiency is improved. It can be a good radiating fin. As a result, it is possible to provide the radiating fins 22 that can be easily assembled and the fins 32a to 32h are hardly deformed.

  Further, in the heat radiation fin 22 of the embodiment, the inflow side fin portions 40a to 40h are joined by two projections 46a, 46c, 46e, 46g, 48a, 48c, 48e, 48g or one projection 47b, 47d, 47f. The first offset fin portions 50a to 50h are joined by one projection 57a, 57c, 57e, 57g or two projections 56b, 56d, 56f, 58b, 58d, 58f, and the second offset fin portion 60a-60h are joined by two projections 66a, 66c, 66e, 66g, 68a, 68c, 68e, 68g or one projection 67b, 67d, 67f. For this reason, the rigidity of each fin 32a-32h can be made high, and the deformation | transformation can be suppressed.

  In the manufacturing method of the heat dissipating fins 22 of the embodiment, the fin member 30 is formed using an aluminum clad plate material, so that the attachment side connecting portions 72, 74, 76, 78 of the fin member 30 are in contact with the base member 24 and the fins Each protrusion formed on the member 30 is brought into contact with each fin portion, put into a furnace, and then cooled, and then the fin member 30 is fixedly attached to the base member 24 and each protrusion formed on the fin member 30. Can be simultaneously joined to the fin portions. In addition, the fin 32a, the attachment side connecting portion 72, the fin 32b, the tip side connecting portion 73, the fin 32c, the attachment side connecting portion 74, the fin 32d, the tip side connecting portion 75, the fin 32e, and the attachment side connecting portion with respect to the plate material. 76, the fin 32f, the tip side connecting portion 77, the fin 32g, the attachment side connecting portion 78, and the fin 32h are formed in this order to form a single continuous fin member, and the fin member 30 is formed by bending it into a zigzag shape. The fin member can be easily formed. As a result, it is possible to provide a method of manufacturing the radiation fin 22 that is easy to assemble and is difficult to deform the fins 32a to 32h.

  In the radiating fin 22 of the embodiment, the fins 30a to 32h are connected by the attachment side connecting portions 72, 74, 76, and 78 and the tip side connecting portions 73, 75, and 77 and attached to the fin member 30 formed in a zigzag shape. The heat radiating fins 22 were configured by joining the side connecting portions 72, 74, 76, 78 to the base member 24. However, each fin may be formed individually, and each fin may be individually fixed to the base member.

  In the heat dissipating fin 22 of the embodiment, the fin member 30 is connected to the fins 32a to 32h by the attachment side connecting portions 72, 74, 76, 78 and the front end side connecting portions 73, 75, 77 so as to form a zigzag shape. Although formed, it may be formed in a spiral shape.

  In the radiating fin 22 of the embodiment, the fins 32a to 32h are connected by the attachment side connecting portions 72, 74, 76, and 78 and the tip side connecting portions 73, 75, and 77. It is good also as what connects one or both of all the front end parts by a connection part.

  In the radiating fin 22 of the embodiment, the two first offset fin portions 50a to 50h and the second offset fin portions 60a to 60h having different offset directions are formed on the downstream side of the inflow side fin portions 40a to 40h of the fin member 20. However, it is good also as what forms the offset fin part of only one step in the downstream of the inflow side fin part. In this case, the offset amount of the offset fin portion of each fin is preferably ½ of the interval between the fins. Further, three or more offset fin portions may be formed on the downstream side of the inflow side fin portion. In this case, the offset fin portions may be formed to have different offset amounts.

  In the radiating fin 20 and the manufacturing method thereof according to the embodiment, the base member 22 and the fin member 24 are formed using a clad plate material in which a brazing material such as an aluminum silicon alloy is bonded to both surfaces of an aluminum plate material. A heat radiating fin comprising a base member and a fin member having the same shape as the base member 22 and the fin member 24 using a clad plate material in which a brazing material is bonded to both surfaces of the plate material or a plate material plated on both surfaces of a copper plate material. It may be formed.

  As mentioned above, although the form for implementing this invention was demonstrated using the Example, this invention is not limited at all to such an Example, In the range which does not deviate from the summary of this invention, it is with various forms. Of course, it can be implemented.

  The present invention can be used in the manufacturing industry of radiating fins.

  12 Heating member, 20 Cooling device, 22 Radiation fin, 24 Base member, 30 Fin member, 32a to 32h Fin, 40a to 40h Inflow side fin member, 42a to 42h Mounting side end, 44a to 44h Tip side end, 46a ˜46 g, 47 b to 47 f Protrusion, 50 a to 50 h First offset fin member, 52 a to 52 h Mounting side end, 54 a to 54 h Tip side end, 46 b to 46 f, 47 a to 47 g Protrusion, 60 a to 60 h Second offset fin member 62a to 62h Attachment side end, 64a to 64h Tip end, 66a to 66g, 67b to 67f Protrusion, 72, 74, 76, 78 Attachment side connection, 73, 75, 77 Tip side connection, 90 Centrifugal Fan, 92 motor, 94 fan, 96 air inlet, 98 air outlet.

Claims (10)

A base member disposed in contact with the heat member and a plurality of thin plate-like fins attached to the base member at a predetermined interval, and dissipating heat to the heat exchange fluid flowing between the plurality of fins. A heat dissipating fin for cooling the heat member by:
The plurality of fins include an inflow side fin portion from an inflow side of the heat exchange fluid, and a direction perpendicular to the flow of the heat exchange fluid with respect to the inflow side fin portion at a downstream side of the inflow side fin portion. An offset fin portion offset by an interval smaller than the predetermined interval,
The inflow side fin portion and the offset fin portion are connected at the mounting end portion on the base member side and the tip end portion on the opposite side to the mounting end portion,
A heat dissipating fin. The heat dissipating fin according to claim 1,
The offset fin portion is offset from the inflow side fin portion by half of the predetermined interval.
Heat dissipation fins. The heat dissipating fin according to claim 1,
The offset fin portion includes a first offset fin portion offset from the inflow side fin portion by 1/3 of the predetermined interval, and the first offset fin portion downstream of the first offset fin portion by 1/3 of the predetermined interval. A second offset fin portion offset to the opposite side of the offset fin portion,
Heat dissipation fins. The heat dissipating fin according to any one of claims 1 to 3,
The plurality of fins are joined by a plurality of protrusions formed on adjacent fins,
Heat dissipation fins. The heat dissipating fin according to any one of claims 1 to 4,
The plurality of fins are formed in a folded shape with the attachment end portion and the tip end portion being bent portions,
Heat dissipation fins. A heat dissipating fin according to any one of claims 1 to 5,
The plurality of fins are connected at the tip.
Heat dissipation fins. The heat dissipating fin according to any one of claims 1 to 6,
The plurality of fins are formed such that the inflow side fin portion protrudes to the upstream side in the flow of the heat exchange fluid as it is located in the center.
Heat dissipation fins. A base member disposed in contact with the heat member and a plurality of thin plate-like fins attached to the base member at a predetermined interval, and dissipating heat to the heat exchange fluid flowing between the plurality of fins. A method of manufacturing a heat radiating fin that cools the heat member by:
With respect to a single plate material, the inflow side fin portion on the inflow side of the heat exchange fluid and the downstream side of the inflow side fin portion in a direction perpendicular to the flow of the heat exchange fluid with respect to the inflow side fin portion. The inflow side fin portion and the offset fin portion are connected at the mounting end portion on the base member side and the tip end portion on the opposite side to the mounting end portion. A plurality of fins are connected to the mounting end of the adjacent fin by the mounting side connecting portion over the plurality of fins, and the tip end is connected to the tip end of the adjacent fin by the leading end side connecting portion. A first step of forming a continuous fin member,
A second step of forming the continuous fin member into a bent fin member by bending the attachment-side connecting portion and the tip-side connecting portion so that the interval between the plurality of fins is the predetermined interval;
A third step of attaching the attachment end of the bent fin member to the base member;
The manufacturing method of the radiation fin characterized by including. It is a manufacturing method of the radiation fin of Claim 8, Comprising:
The first step is a step of forming the continuous fin member such that the offset fin portion is offset to the side opposite to the offset fin portion of an adjacent fin,
The second step is a step of forming the bent fin member by bending the continuous fin member into a zigzag shape.
Manufacturing method of heat radiation fin. It is a manufacturing method of the radiation fin of Claim 8 or 9,
The first step is a step of forming the continuous fin member using a clad plate material in which a second metal having a melting point lower than that of the first metal is bonded to both surfaces to a center material made of the first metal.
The third step is a step of brazing by placing the bent fin member in a furnace having a temperature higher than the melting point of the second metal and lower than the melting point of the first metal in a state of being attached to the base member.
Manufacturing method of heat radiation fin.

Images