JP2014096413A - Facing tandem fin structure and cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a facing tandem fin structure ensuring a higher heat transfer rate and lower pressure loss than conventional in a limited space, with a convenient structure, and to provide a cooler.SOLUTION: A facing tandem fin structure includes a first plate, a second plate arranged to face the first plate, a first fin array of a plurality of first fins formed at a predetermined interval, where there is a space between the tip of the first fin and the second plate, and the proximal end of the first pin is in contact with the first plate or integrated therewith, and a second fin array of a plurality of second fins formed at a predetermined interval, and arranged alternately to the first fins, where there is a space between the tip of the second fin and the first plate, and the proximal end of the second pin is in contact with the second plate or integrated therewith.

Description

  The present invention relates to a cooling device and a structure suitable for the cooling device.

  Conventionally, a cooling device and a structure suitable for the cooling device include one in which a number of flat pins (strip pins) are arranged in order to suppress internal pressure loss (see, for example, Patent Document 1). In addition, there is a structure in which cooling fins are structured by disposing cooling fins and strips or pins facing each other and disturbing cooling air with the strips or pins (see, for example, Patent Document 2). Further, there is a heat radiating fin provided with a slit to enhance a heat radiating effect (for example, see Patent Document 3).

Japanese Patent Laid-Open No. 5-102357 (FIGS. 1 and 4) Japanese Patent Laid-Open No. 10-190268 (FIGS. 1 to 5) Japanese Patent Laying-Open No. 2005-294425 (FIGS. 1 to 6)

  When cooling a heating element such as an electronic component mounted on an electronic module, a cooling device having a heat sink that cools by heat dissipation is effective. In recent years, electronic modules are required to be miniaturized and mounted with high density, and thus the heat generation density tends to increase. Furthermore, when an electronic module (heating element) is mounted on a platform such as a vehicle or a ship, the mass and space are limited.

  However, in the structure described in Patent Document 1, since it is difficult to increase the area of the flat pins (strip pins), there is a problem that the cooling efficiency is limited. Further, the structure described in Patent Document 1 has a problem that the structure is complicated by the flat pins. Similarly, in the structure described in Patent Document 2, there is a problem that the structure is complicated by strip plates and pins. In addition, in the structure described in Patent Document 3, since it is necessary to form slits in the radiating fins, there is a problem that the manufacturing process is complicated.

  The present invention has been made in order to solve the above-described problems, and has an opposed tandem fin structure and a cooling structure that have a simpler structure but a higher heat transfer rate and lower pressure loss than those of conventional ones in a limited space. An object is to provide an apparatus.

  The opposed tandem fin structure according to the invention of claim 1 is a first flat plate, a second flat plate arranged to face the first flat plate, and a plurality of first fins formed at predetermined intervals. Thus, there is a space between the tip of the first fin and the second flat plate, and the first fin is in contact with or integrated with the first flat plate at the base end of the first fin. A plurality of rows and a plurality of second fins formed at predetermined intervals and arranged alternately with the first fins, and there is a space between the tip of the second fin and the first flat plate. The second fin has a second fin row in which the base end of the second fin is in contact with the second flat plate or integrated with the second flat plate.

  In the opposed tandem fin structure according to the invention of claim 2, the distance between the first flat plate and the second flat plate is greater than the distance from the tip of the first fin to the second flat plate at the portion facing the tip. It is a thing of Claim 1 which is long.

  The opposing tandem fin structure according to the invention of claim 3 is such that the distance from the tip of the first fin to the second flat plate of the portion facing the tip is that of the portion facing the tip from the tip of the second fin. It is a thing of Claim 1 or 2 equal to the distance to a said 1st flat plate.

  In the opposed tandem fin structure according to the invention of claim 4, the distance from the tip of the first fin to the second flat plate of the portion facing the tip is the distance between the adjacent first fin and the second fin. It is a thing in any one of Claim 1, 2, 3 which is shorter than this.

  The opposed tandem fin structure according to the invention of claim 5 is the first flat plate, the second flat plate, and the first cross section in a cross section intersecting with a direction in which the first fin row and the second fin row extend. The cross-sectional area of the space surrounded by the fins and the second fins is such that the front end of the first fin and the second flat plate in a cross section intersecting with the direction in which the first fin row and the second fin row extend. It is a thing in any one of Claims 1-4 wider than the cross-sectional area of the space between these.

  In the opposed tandem fin structure according to the invention of claim 6, the first fin row and the second fin row are divided so as to intersect in a direction in which the first fin row and the second fin row extend. The first fins and the second fins are interspersed, and a plurality of the first fins facing each other across a divided portion of the first fin row are arranged in steps, and the second fins The plurality of second fins facing each other across the divided portion of the row are those according to any one of claims 1 to 5 arranged in steps.

  In the opposed tandem fin structure according to the seventh aspect of the invention, the plurality of first fins facing each other with the divided portion of the first fin row sandwiched the second fin between the divided portions. The plurality of second fins that are sandwiched and opposed across the divided portion of the second fin row sandwich the first fin between the divided portions. Is.

  A cooling device according to an eighth aspect of the present invention is a cooling device using the opposing tandem fin structure according to any one of the first to seventh aspects, wherein the first fin row and the second fin row extend. A blower fan that blows air in a direction and cools the first flat plate and the second flat plate is provided.

  The cooling device according to the invention of claim 9 is a first flat plate, a second flat plate disposed opposite to the first flat plate, and a plurality of first fins formed at a predetermined interval, respectively. There is a space between the tip of the first fin and the second flat plate, and the first fin row in which the base end of the first fin is in contact with the first flat plate or integrated with the first flat plate, A plurality of second fins that are formed at predetermined intervals and are alternately arranged with the first fins, and there is a space between the tip of the second fin and the first flat plate, A second fin row in which the base end of the second fin is in contact with or integrated with the second flat plate, and the surface of the first flat plate opposite to the surface facing the second flat plate is mounted. The first heating element placed or in contact with the first flat plate in the second flat plate A second heating element placed on or in contact with the surface opposite to the surface to be contacted, and a blower fan that blows air in a direction in which the first fin row and the second fin row extend, The wind speed of the air blown by the blower fan is between the tip of the first fin and the second flat plate rather than the portion surrounded by the first flat plate, the second flat plate, the first fin, and the second fin. It is characterized by the fact that the space is faster.

  The cooling device according to a tenth aspect of the present invention is the cooling device, wherein the first flat plate, the second flat plate, the first fin, and the cross section intersecting a direction in which the first fin row and the second fin row extend. The cross-sectional area of the space surrounded by the second fin is between the tip of the first fin and the second flat plate in a cross section intersecting the direction in which the first fin row and the second fin row extend. It is a thing of Claim 9 which is wider than the cross-sectional area of the space between.

  In the cooling device according to an eleventh aspect of the present invention, the first fin row and the second fin row are divided so as to intersect in a direction in which the first fin row and the second fin row extend. A plurality of the first fins facing each other across the divided portion of the first fin row are arranged in steps, and the fins and the second fins are scattered. The plurality of second fins facing each other across the divided portion are arranged in a stepwise manner.

  The opposed tandem fin structure according to the invention of claim 12 is a first flat plate, a second flat plate arranged to face the first flat plate, and a plurality of first fins formed at predetermined intervals. Thus, there is a space between the tip of the first fin and the second flat plate, and the first fin is in contact with or integrated with the first flat plate at the base end of the first fin. A plurality of rows and a plurality of second fins formed at predetermined intervals and arranged alternately with the first fins, and there is a space between the tip of the second fin and the first flat plate. A second fin row in which a base end of the second fin is in contact with the second flat plate or integrated with the second flat plate, and a plurality of third fins formed at predetermined intervals, respectively. There is a space between the tip of the third fin and the second flat plate, A plurality of third fin rows whose base ends of the third fins are in contact with the first flat plate or integrated with the first flat plate are formed at predetermined intervals, and are arranged alternately with the third fins. A fourth fin, wherein a space exists between a tip of the fourth fin and the first flat plate, and a base end of the fourth fin is in contact with the second flat plate or integrated with the second flat plate. The first fin row and the fourth fin row are arranged in the same straight line, and the second fin row and the third fin row are arranged in the same straight line. It is characterized by that.

  A cooling device according to a thirteenth aspect of the present invention is the cooling device using the opposed tandem fin structure according to the twelfth aspect, wherein the first fin row and the second fin row, the third fin row, It is characterized by comprising a blower fan that blows air in a direction in which the fourth fin row extends to cool the first flat plate and the second flat plate.

  A cooling device according to a fourteenth aspect of the present invention is a first fin formed by a plurality of first flat plates, second flat plates arranged to face the first flat plates, and spaced apart from each other by a predetermined distance. There is a space between the tip of the first fin and the second flat plate, and the first fin row in which the base end of the first fin is in contact with the first flat plate or integrated with the first flat plate, A plurality of second fins that are formed at predetermined intervals and are alternately arranged with the first fins, and there is a space between the tip of the second fin and the first flat plate, A second fin array in which a base end of the second fin is in contact with the second flat plate or integrated with the second flat plate, and a plurality of third fins each formed at a predetermined interval; There is a space between the tip of the 3 fin and the second flat plate, A plurality of third fin rows whose ends are in contact with the first flat plate or integrated with the first flat plate, and a plurality of fourth fins formed at predetermined intervals and arranged alternately with the third fins; And there is a space between the tip of the fourth fin and the first flat plate, and a base end of the fourth fin is in contact with the second flat plate or integrated with the second flat plate. The fin array, the first heating element placed on or in contact with the surface of the first flat plate opposite to the surface facing the second flat plate, and the first flat plate of the second flat plate are opposed to each other. A second heating element placed on or in contact with the surface opposite to the surface, and a blower fan for blowing air in a direction in which the first fin row and the second fin row extend, The air velocity of the air blown by the blower fan is such that the first flat plate, the second flat plate, and the first flow rate. The space between the tip of the first fin and the second flat plate is faster than the portion surrounded by the second fin and the second fin. The space between the tip of the third fin and the second flat plate is earlier than the portion surrounded by the second flat plate, the third fin, and the fourth fin.

  As described above, according to the inventions according to claims 1 to 6 and 12, it is possible to obtain an opposing tandem fin structure capable of achieving both enhancement of cooling efficiency and suppression of internal pressure loss.

  According to the invention which concerns on Claims 7-10, and 13 and 14, the cooling device which can improve cooling efficiency and suppress internal pressure loss can be obtained.

It is an exploded view of the opposing tandem fin structure (1st flat plate and 2nd flat plate) which concerns on Embodiment 1 of this invention. It is a decomposition | disassembly schematic diagram of the opposing tandem fin structure (1st flat plate and 2nd flat plate) which concerns on Embodiment 1 of this invention. It is a block diagram of the 1st flat plate of the opposing tandem fin structure which concerns on Embodiment 1 of this invention. It is a block diagram of the 2nd flat plate of the opposing tandem fin structure which concerns on Embodiment 1 of this invention. It is a block diagram of the opposing tandem fin structure which concerns on Embodiment 1 of this invention. It is explanatory drawing of the air path of the opposing tandem fin structure which concerns on Embodiment 1 of this invention. It is a step view of the opposing tandem fin structure (the 1st flat plate and the 2nd flat plate) concerning Embodiment 1 of this invention. It is positional relationship explanatory drawing of the 1st flat plate and 2nd flat plate of the opposing tandem fin structure which concerns on Embodiment 1 of this invention. It is a block diagram of the cooling device which concerns on Embodiment 1 of this invention. It is a block diagram of the 1st flat plate of the opposing tandem fin structure which concerns on Embodiment 1 of this invention. It is a block diagram of the 2nd flat plate of the opposing tandem fin structure which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. 1 to 9, reference numeral 1 denotes a first flat plate (first heat radiating plate), and 2 denotes a second flat plate (second heat radiating plate) disposed to face the first flat plate 1. 3 is a plurality of first fins (first radiating fins) formed at a predetermined interval (distance D1), 3r is a space between the tip of the first fin 3 and the second flat plate 2, This is a first fin row (first radiating fin row) in which the base end of one fin 3 is in contact with or integrated with the first flat plate 1. The distance between the tip of the first fin 3 and the second flat plate 2 is a distance d3. Reference numeral 4 denotes a plurality of second fins (second radiating fins) formed at a predetermined interval (distance D2), 4r denotes a space between the tip of the second fin 4 and the first flat plate 1, This is a second fin row (second radiating fin row) in which the base ends of the two fins 4 are in contact with or integrated with the second flat plate 2. A distance between the tip of the second fin 4 and the first flat plate 1 is a distance d4. The side portion of the first flat plate 1 parallel to the direction in which the first fins 3 (first fin row 3r) extend is in relation to the flat portion (flat plate portion) of the first flat plate 1 where the first fins 3 are formed. A protruding wall-shaped first flat plate edge 1e is formed. Similarly, side portions of the second flat plate 2 parallel to the direction in which the second fins 4 (second fin rows 4r) extend are flat portions (flat plate portions) of the second flat plate 2 where the second fins 4 are formed. A wall-like second flat plate edge 2e that protrudes from the wall is formed. In the facing tandem fin structure according to Embodiment 1, the wind flows in the direction in which the first fin 3 (first fin row 3r) and the second fin 4 (second fin row 4r) extend. The first flat plate 1 and the second flat plate 2 may be the same. In this case, it may be referred to as a flat plate 12. When the 1st flat plate 1 and the 2nd flat plate 2 are the same, the 1st fin 3 and the 2nd fin 4 may be called the fin 34 (radiation fin 34, cooling fin 34). When the first flat plate 1 and the second flat plate 2 are the same, the first fin row 3r and the second fin row 4r may be referred to as a fin row 34r (radiation fin row 34r, cooling fin row 34r). . In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  1 to 9, reference numeral 5 denotes a first heating element placed on or in contact with a surface of the first flat plate 1 opposite to the surface facing the second flat plate 2, and 6 denotes a first heating plate of the second flat plate 2. The second heating element, the first heating element 5 and the second heating element 6 placed on or in contact with the surface opposite to the surface facing the flat plate 1 are electronic components mounted on the electronic module or the electronic module itself. Is an object (for example, a substrate) that generates heat and can be brought into direct or indirect contact with the first flat plate 1 and the second flat plate 2. When the first heating element (second heating element 6) is indirectly placed or brought into contact with the first flat plate 1 (second flat plate 2), the first heating element (second heating element 6) and the first flat plate 1 are used. A case where a heat radiation sheet (heat radiation film), a heat radiation compound (heat radiation grease), a heat radiation filler, etc. are arranged between the second flat plate 2 and the like. Reference numeral 7 denotes a blower fan (blower) that blows air in the direction in which the first fin row 3r and the second fin row 4r extend. The blower fan 7 may be a general fan used for air cooling of the heat sink, and the wind flows in the direction in which the first fin 3 (first fin row 3r) and the second fin 4 (second fin row 4r) extend. Any cooling fan can be used. Reference numeral 8 denotes a fixture for fixing the first flat plate 1 and the second flat plate. The fixture 8 is assumed to be a screw, a bolt, or the like that fastens the first flat plate 1 and the second flat plate 2. Moreover, in this application, the fixing tool 8 fixes the 1st flat plate fixing | fixed part 1f formed in the side of the 1st flat plate 1, and the 2nd flat plate fixing | fixed part 2f formed in the side of the 2nd flat plate 2 ( Although what is to be concluded is illustrated, the present invention is not limited to this. In addition, the 1st flat plate fixing | fixed part 1f and the 1st flat plate edge part 1e may be formed continuously. Similarly, the 2nd flat plate fixing | fixed part 2f and the 2nd flat plate edge part 2e may be formed continuously. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  Further, since the distance D1 and the distance D2 are equal, the distance D may be simply referred to. The distance D1 corresponds to (2 × d1 + the thickness of the second fin 4) / 2, and the distance D2 corresponds to (2 × d1 + the thickness of the first fin 3) / 2. The distance between the flat portion of the first flat plate 1 and the flat portion of the second flat plate 2 is the distance d2. Therefore, “distance d2 = distance d3 + height of the first fin 3” and “distance d2 = distance d4 + height of the second fin 4”. In order to arrange and maintain the first flat plate 1 and the second flat plate 2 at a distance d2, the first flat plate edge 1e (first flat plate fixing portion 1f) and the second flat plate edge 2e (second flat plate). The fixing part 2f) is overlaid. That is, the first flat plate edge 1e is prevented so that the tip of the first fin 3 does not contact the flat portion of the second flat plate 2 (so that the tip of the second fin 4 does not touch the flat portion of the first flat plate 1). It is necessary to form the (first flat plate fixing portion 1f) and the second flat plate edge portion 2e (second flat plate fixing portion 2f). In the present application, the first flat plate 1 and the second flat plate 2 may be referred to as a high heat generation area. This is not only the case where the first flat plate 1 and the second flat plate 2 themselves generate heat, but also the first flat plate 1 and the second flat plate 2 themselves. The case where the heat generated by the heating element 5 and the second heating element 6 is conducted is also included. Of course, the 1st flat plate 1 and the 1st heat generating body 5 may be integrated, and the 2nd flat plate 2 and the 2nd heat generating body 6 may be integrated. Further, a space between the first fin row 3r and the second fin row 4r is an air path. Adjacent air passages communicate with each other through a divided portion between the first fin row 3r and the second fin row 4r.

  Here, details of FIGS. 1, 2, and 5 will be described. 1A is a view of the first flat plate 1 viewed from the side, FIG. 1B is a view of the first flat plate 1 viewed from the side where the first fins 3 are formed, and FIG. The figure which looked at the flat plate 2 from the side, FIG.1 (d) the figure which looked at the 2nd flat plate 2 from the side in which the 2nd fin 4 was formed, FIG.2 (a) looked at the 1st flat plate 1 from the side. FIG. 1B is a schematic view of the first flat plate 1 viewed from the side where the first fins 3 are formed. FIG. 1C is a schematic view of the second flat plate 2 viewed from the side. FIG. d) It is the schematic diagram which looked at the 2nd flat plate 2 from the opposite side to the side in which the 2nd fin 4 was formed. For this reason, in FIG.1 (d), the 2nd fin 4 is transparently displayed with the dotted line.

  FIG. 2 (e) is a schematic view seen from the side with the first flat plate 1 and the second flat plate 2 facing each other, and FIG. 2 (f) shows the first flat plate 1 and the second flat plate 2 at a distance d2. FIG. 2F is a schematic view seen from the side in a fixed state, and FIG. 2F corresponds to an enlarged view around a circle indicated by a dotted line in FIG. FIG. 2F is an enlarged cross-sectional view in the vicinity of the circle indicated by the dotted line in FIG. 2E (a cross-sectional view intersecting the direction in which the first fin row 3r and the second fin row 4r extend). Is also equivalent. The distance between the flat portion of the first flat plate 1 and the flat portion of the second flat plate 2 shown in FIG. 2 (f) is d2. Furthermore, the space W is a space surrounded by the first flat plate 1, the second flat plate 2, the first fin 3, and the second fin 4, as shown in FIG. The space N1 is a space between the tip of the first fin 3 and the second flat plate 2 as shown in FIG. The space N2 is a space between the tip of the second fin 4 and the first flat plate 1 as shown in FIG.

  5A is a side view of the opposing tandem fin structure, FIG. 5B is a cross-sectional view of the opposing tandem fin structure taken along line S-S shown in FIG. 5A, and FIG. c) is a cross-sectional view of the opposing tandem fin structure cut along line AA shown in FIG. 5 (b), and FIG. 5 (d) is the opposing tandem fin cut along line BB shown in FIG. 5 (b). FIG. 5E is a cross-sectional view of the opposing tandem fin structure taken along line CC shown in FIG. 5C.

  FIG. 3 corresponds to FIG. 1B, and FIG. 4 corresponds to FIG. 1D (the second fin 4 is indicated by a dotted line). FIG. 6 is an enlarged view of a part of the cross-sectional view shown in FIG. 2 (f), FIG. 5 (d), (e), FIG. 7, and FIG. 8 are cross-sections that intersect the direction in which the first fin row 3r and the second fin row 4r extend. Among these, the one orthogonal to the direction in which the first fin row 3r and the second fin row 4r extend is illustrated.

  FIG. 1 shows a state in which the first flat plate 1 and the second flat plate 2 are disassembled. As shown in FIGS. 1A and 1B and FIGS. 2A and 2B, the first flat plate 1 has a plurality of first fins 3 formed on a flat portion (flat plate portion). As shown in FIGS. 1C and 1D and FIGS. 2C and 2D, the second flat plate 2 has a plurality of second fins 4 formed on a flat portion (flat plate portion). As shown in FIG. 2 (f), the first fin 3 and the second flat plate 2 face each other, the second fin 4 and the first flat plate 1 face each other, and the first fin 3 and the second flat plate 2 face each other. The two fins 4 are alternately arranged to form a tandem shape arranged vertically. In the present application, the first fin 3 and the second fin 4 in such a state are referred to as opposed tandem fins. That is, this application is related with the opposing tandem fin structure which has an opposing tandem fin. This opposed tandem fin structure is a structure (shape) as a heat sink that cools a heating element (first heating element 5, second heating element 6) that is a component that generates heat. Specifically, it provides a cooling fin (radiation fin) shape of the heat sink.

  Further, as shown in FIG. 3, the first fins 3 (first fin row 3r) on the first flat plate 1 are a plurality of first fins 3 arranged in a first row indicated by a dotted line and a second row indicated by a dotted line. The plurality of first fins 3 arranged in a row are arranged in a stepped manner with a divided portion surrounded by an alternate long and short dash line therebetween. That is, the first fins 3 (first fin rows 3r) on the first flat plate 1 have a structure in which the first fins 3 are dotted by being divided so as to intersect the direction in which the first fin rows 3r extend. It can be said that the plurality of first fins 3 facing each other across the divided portion of the first fin row 3r (the divided portion surrounded by the alternate long and short dash line shown in FIG. 3) are arranged in steps.

  Similarly, as shown in FIG. 4, the second fins 4 (second fin row 4r) in the second flat plate 2 are a plurality of second fins 4 arranged in the first row indicated by dotted lines and the second row indicated by dotted lines. The plurality of second fins 4 arranged in a row are arranged in a stepped manner with a divided portion surrounded by an alternate long and short dash line therebetween. That is, the second fins 4 (second fin row 4r) on the second flat plate 2 have a structure in which the second fins 4 are dotted by being divided so as to intersect the direction in which the second fin row 4r extends, It can be said that the plurality of second fins 4 facing each other across the divided portion of the second fin row 4r (the divided portion surrounded by the alternate long and short dash line shown in FIG. 3) are arranged in steps.

  Therefore, when the opposing tandem fin structure according to the first embodiment is configured by overlapping the first flat plate 1 and the second flat plate 2, the opposing tandem fin structure according to the first embodiment includes the first fin row 3r and the second fin array 3r. The fin row 4r has a structure in which the first fin row 3 and the second fin row 4 are divided by crossing in the direction in which the first fin row 3 and the second fin row 4 extend, and the first fin row 4r is scattered. The plurality of first fins 3 facing each other across the divided portion of 3r are arranged in a stepwise manner, and the plurality of second fins 4 facing each other across the divided portion of the second fin row 4r are arranged in a stepped manner. Is arranged. In FIGS. 3 and 4, the first column, the second column, and the illustrated “column” have been described, but this is also true for other columns. Moreover, in FIG.3 and FIG.4, although one part part was shown as an example, it cannot be overemphasized that part parts other than this place may be sufficient.

  The first flat plate 1 shown in FIG. 3 and the second flat plate shown in FIG. 4 are overlapped so that the distance between the flat portion of the first flat plate 1 and the flat portion of the second flat plate 2 is maintained at “distance d2”. Then, the opposing tandem fin structure shown in FIG. 5 is configured. In FIG. 5, the 1st flat plate 1 and the 2nd flat plate 2 are fastened with the fixing tool 8 (screw), and become an opposing tandem fin. The opposed tandem fin structure having such opposed tandem fins has a structure in which two flat plates 12 are used and the first fin 3 and the second fin 2 are opposed to each other while securing the space N1 and the space N2 as clearances. I'm taking it. The fins 34 are formed upright on the base surface (the flat surface of the first flat plate 1, the second flat plate 2), and are arranged in a plurality of rows parallel to the direction in which the fins 34 extend (fin row 34r). . In FIG. 5, the fin row 34 r is divided into 12 parts, but can be changed as appropriate. The number of fin rows 34r can be changed as appropriate.

  In these fin rows 34r, the adjacent ones across the dividing portion are arranged so that the positions of the first fins 3 and the second fins 4 are shifted as shown in FIGS. 5 (d) and 5 (e). Has been. Accordingly, since the fins 34 are displaced, the cooling air is also applied to the fins 34 in the opposed tandem fin structure, and the heat transfer coefficient is improved. Specifically, as shown in FIG. 5 (c), the first fin row 3r in which the first fins 3 are arranged is divided, and the divided second fins 4 are arranged in the shifted portions. The second fin row 4r in which the second fins 4 are arranged is divided, and the divided first fins 3 are arranged in the shifted portions.

  That is, in particular, as is apparent from FIGS. 5C and 7, the first fins 3 and the second fins are alternately arranged in a straight line, so that the space W can be easily set wide. Become. The fact that the first fins 3 and the second fins are alternately arranged in a straight line means that the plurality of first fins 3 facing each other across the divided portions of the first fin row 3r are divided portions. The second fins 4 are sandwiched between the plurality of second fins 4 facing each other with the divided portion of the second fin row 4r interposed therebetween, and the first fins 3 are sandwiched between the divided portions. Refers to being.

  Therefore, in the fin 34 inside the opposed tandem fin structure, as shown in FIGS. 6 and 7, the cooling air including the cooling air flowing through the space N1 hits the proximal end portion (root portion) of the second fin 4, The second fin 4 is cooled. Further, as shown in FIGS. 6 and 7, the cooling air including the cooling air flowing through the space N <b> 2 hits the base end portion (root portion) of the first fin 3, and the first fin 3 is cooled. Therefore, cooling of the high heat generation area in the vicinity of the base surface (flat portion of the flat plate 12) by the fins 34 inside the opposed tandem fin structure is promoted.

  Further, the opposing tandem fins formed by the fins 34 have a structure in which the first fins 3 and the second fins 4 are engaged with each other, so that they are closer to the base surface (the flat portion of the flat plate 12) in the spaces N1 and N2 than the space W. The speed of the cooling air in the high heat generation area can be increased. By taking the space W wider than the spaces N1 and N2, the pressure loss inside the opposed tandem fin structure can be suppressed. As a result, when the same air volume is flowed, a high heat transfer coefficient can be obtained while maintaining a pressure loss equivalent to that of a conventional heat sink.

  The opposing tandem fins formed by the fins 34 mesh with the first fins 3 (first fin row 3r) and the second fins 4 (second fin row 4r) facing each other, with a certain clearance (space W, space N1, space N2). ). In the present application, in order to obtain a certain clearance (space W, space N1, space N2), as shown in FIG. 5A, a screw 8 is selected as the fixture 8, and the flat plate 12 is fastened by this screw 8. Shows when to do. However, the means is not particularly limited as long as the clearance can be maintained. The clearance amount (the volume of the space W, the space N1, and the space N2) is changed and adjusted depending on the case of the one to be cooled (the first heating element 5 and the second heating element 6).

  The counter tandem fin structure according to the first embodiment is more effective than the space W in order to increase the cooling air speed in the high heat generation area near the base surfaces (flat portions of the flat plate 12) in the spaces N1 and N2. 6 and the structure as shown in FIG. The counter tandem fin structure shown in FIG. 6 and FIG. 2 (f) has a first flat plate 1, a second flat plate 2, 2 in a cross section intersecting with the direction in which the first fin row 3 r and the second fin row 4 r extend. The cross-sectional area of the space W surrounded by the first fin 3 and the second fin 4 is the tip of the first fin 3 in the cross section intersecting the direction in which the first fin row 3r and the second fin row 4r extend. The cross-sectional area of the space N1 between the second flat plate 2 is wider. Similarly, the opposed tandem fin structure shown in FIG. 6 and FIG. 2 (f) has the first flat plate 1 and the second flat plate in a cross section intersecting with the extending direction of the first fin row 3r and the second fin row 4r. 2, the cross-sectional area of the space W surrounded by the first fin 3 and the second fin 4 is that of the second fin 4 in a cross section intersecting the direction in which the first fin row 3r and the second fin row 4r extend. The cross-sectional area of the space N2 between the tip and the first flat plate 1 is wider.

  Similarly, the opposed tandem fin structure according to the first embodiment is faster than the space W in order to increase the speed of the cooling air in the high heat generation area near the base surfaces (flat portions of the flat plate 12) in the spaces N1 and N2. The positional relationship (distance relationship) of the first flat plate 1, the second flat plate 2, the first fin 3 (first fin row 3r), and the second fin 4 (second fin row 4r) is the same as that shown in FIG. ) And FIG. 2 (f), the distance d1 between the first flat plate 1 and the second flat plate 2 is greater than the distance d3 from the tip of the first fin 3 to the second flat plate 2 at the portion facing the tip. Is also long. Further, a distance d3 from the tip of the first fin 3 to the second flat plate 2 at a portion facing the tip is shorter than the distance d1 between the first fin 1 and the second fin 4 adjacent to each other. Further, as shown in FIG. 8 (the same positional relationship as FIG. 6) and FIG. 2 (f), the distance d1 between the first flat plate 1 and the second flat plate 2 is opposed to the tip from the tip of the second fin 4. It is longer than the distance d4 to the first flat plate 1 of the part. The distance d4 from the tip of the second fin 4 to the first flat plate 1 at the portion facing the tip is shorter than the distance d1 between the first fin 1 and the second fin 4 adjacent to each other.

  Therefore, the counter tandem fin structure according to Embodiment 1 can easily obtain a heat sink structure that can maintain an appropriate heat transfer rate that is neither excessive nor insufficient by adjusting the clearance. In the opposed tandem fin structure according to the first embodiment, the distance from the tip of the first fin 3 to the second flat plate 2 of the portion facing the tip is a portion facing the tip from the tip of the second fin 4. By making it equal to the distance to the first flat plate 1, the same first flat plate 1 and second flat plate 2 can be used. In the case of such a structure, the space N1 and the space N2 have the same volume.

  Next, the cooling device according to Embodiment 1 will be described. The cooling device according to the first embodiment is a cooling device using the opposed tandem fin structure according to the first embodiment, and as shown in FIG. 9 (the dotted arrows indicate the flow of wind) A fan provided with a blower fan 7 for sending cooling air to the air passage to cool the first flat plate 1 and the second flat plate 2 by blowing air in the extending direction of the first fin row 3r and the second fin row 4r. It is. The blower fan 7 that blows air in the direction in which the first fin row 3r and the second fin row 4r extend may be integrated with the first flat plate 1 and the second flat plate 2.

  Due to the clearance in the opposed tandem fin structure according to the first embodiment described above, the cooling device according to the first embodiment allows the air velocity of the air blown by the blower fan 7 to be the first flat plate 1, the second flat plate 2, the first fin 3, and The space between the tip of the first fin 3 and the second flat plate 2 is faster than the portion surrounded by the second fin 4. Therefore, the cooling device according to Embodiment 1 can suppress internal pressure loss. As a result, when the same air volume is flowed, a high heat transfer coefficient can be obtained while maintaining a pressure loss equivalent to that of a conventional cooling device using a heat sink.

  10 and 11 show the first flat plate 1 and the second flat plate shown in FIGS. 3 and 4 from different viewpoints, respectively, and are actually the same. 10 and 11, reference numeral 9 denotes a plurality of third fins (third radiating fins) formed at a predetermined interval (distance D 1), and 9 r denotes between the tip of the third fin 9 and the second flat plate 2. Is a third fin row (third radiating fin row) in which a space exists and the base end of the third fin 9 is in contact with the first flat plate 1 or integrated with the first flat plate 1. The distance between the tip of the third fin 9 and the second flat plate 2 is a distance d3. 10 is a plurality of fourth fins (fourth heat dissipating fins) formed at a predetermined interval (distance D2), and 10r is a space between the tip of the fourth fin 10 and the first flat plate 1; This is a fourth fin row (fourth radiating fin row) in which the base end of the four fins 10 is in contact with or integrated with the second flat plate 2. The distance between the tip of the fourth fin 10 and the first flat plate 1 is a distance d4. The side portion of the first flat plate 1 parallel to the direction in which the third fins 9 (third fin row 9r) extend is in relation to the flat portion (flat plate portion) on which the third fins 9 of the first flat plate 1 are formed. A protruding wall-shaped first flat plate edge 1e is formed. Similarly, side portions of the second flat plate 2 parallel to the direction in which the fourth fins 10 (fourth fin row 10r) extend are flat portions (flat plate portions) of the second flat plate 2 where the fourth fins 10 are formed. A wall-like second flat plate edge 2e that protrudes from the wall is formed. In the drawings, the same reference numerals denote the same or corresponding parts, and detailed descriptions thereof are omitted.

  Until now, the first fin 3 and the second fin are alternately arranged in a straight line in the opposed tandem fin structure (the cooling device according to the first embodiment) according to the first embodiment. In other words, the plurality of first fins 3 facing each other across the divided portion of the first fin row 3r sandwich the second fin 4 between the divided portions, and the second fin row 4r is divided. It has been described that the plurality of second fins 4 facing each other with the portion sandwiching the first fin 3 between the divided portions. However, in the counter tandem fin structure according to the first embodiment (the cooling device according to the first embodiment), as shown in FIGS. 10 and 11, the first fins 3 and the third fins 9 are alternately formed, The second fin row 4 and the fourth fin row 10r are alternately provided, the first fin row 3r and the third fin row 9r are formed on the first flat plate 1, and the second fin row 4r and the fourth fin row 10r are second. It may be understood that it is formed on the flat plate 1.

  That is, the opposed tandem fin structure (cooling device according to the first embodiment) according to the first embodiment includes a first flat plate 1 and a second flat plate 2 disposed so as to face the first flat plate 1, respectively. A plurality of first fins 3 are formed with an interval of 1 mm, and there is a space between the tip of the first fin 3 and the second flat plate 2, and the base end of the first fin 3 is the first flat plate 1. A plurality of first fin rows 3r that are in contact with each other or integrated with the first flat plate 1, and a plurality of second fins 4 that are formed at predetermined intervals and are arranged alternately with the first fins 3, There is a space between the tip of the fin 4 and the first flat plate 1, and the second fin row 4 r in which the base end of the second fin 4 is in contact with or integrated with the second flat plate 2; A plurality of third fins 9 each formed at a predetermined interval, the tip of the third fin 9 and the second flat 9 There is a space between the second fin 9 and the third fin row 9r in which the base end of the third fin 9 is in contact with or integrated with the first flat plate 1, and a plurality of third fin rows 9r are spaced apart from each other by a predetermined distance. The fourth fins 10 are formed and arranged alternately with the third fins 9. There is a space between the tip of the fourth fin 10 and the first flat plate 1, and the base end of the fourth fin 10 is the first fin 10. It can be said that the second fin array 10r is in contact with the two flat plates 2 or integrated with the second flat plate 2.

  Further, in the counter tandem fin structure according to the first embodiment (cooling device according to the first embodiment), the first fin row 3r and the fourth fin row 10r are arranged in the same straight line, and the second fin row 4r It can be said that the third fin row 9r is arranged in the same straight line. That is, the plurality of first fins 3 indicated as the first row in FIG. 10 and the plurality of third fins 9 indicated as the second row in FIG. . Similarly, the plurality of second fins 4 shown as the first row in FIG. 11 and the plurality of fourth fins 10 shown as the second row in FIG. . Therefore, regarding the third fin 9 (third fin row 9r) and the fourth fin 10 (fourth fin row 10r), the space W, the space N1, and the space N2, which are clearances, are the first fin 3 (first fin row). 3r) and the second fin 4 (second fin row 4r) can be said to be the same (positional relationship / distance relationship).

  Therefore, the cooling device according to the first embodiment blows air in the direction in which the first fin row 3r and the second fin row 4r, and the third fin row 9r and the fourth fin row 10r extend, It can be said that it provided with the ventilation fan 7 which cools 1 flat plate 1 (1st heat generating body 5) and 2nd flat plate 2 (2nd heat generating body 6).

1 ··· 1st flat plate (first heat dissipation plate), 1e · · 1st flat plate edge, 1f · · 1st flat plate fixing portion, 2 · · 2nd flat plate (second heat dissipation plate), 2e · · · 2 Flat plate edge 2f ··· Second flat plate fixing portion 12 ··· Flat plate 3 · · First fin (first radiating fin) 3r · · First fin row (first radiating fin row) · · · 2nd fin (second radiating fin), 4r ··· second fin row (second radiating fin row), 34 · · fin (radiating fin, cooling fin), 34 · · fin row (radiating fin row, cooling fin row) ) 5 .. 1st heating element, 6 .. 2nd heating element, 7 .. Blower fan (blower), 8 .. Fixing tool (bolt, screw, etc.), 9 .. 3rd fin (3rd radiation fin) ), 9r ·· 3rd fin row (third radiating fin row), 10 ·· 4th fin (fourth radiating fin), 10r ·· 4th fin row (fourth radiating fin) Column).

Claims (14)

  A first flat plate, a second flat plate disposed opposite to the first flat plate, and a plurality of first fins formed at predetermined intervals, respectively, the tip of the first fin and the second flat plate There is a space between the first fin row and the first fin row in which the base end of the first fin is in contact with the first flat plate or integrated with the first flat plate, with a predetermined distance between each. The second fins are alternately arranged with the first fins, and there is a space between the tip of the second fin and the first flat plate, and the base end of the second fin is the second flat plate. An opposed tandem fin structure comprising a second fin row in contact with or integrated with the second flat plate.   2. The opposed tandem fin structure according to claim 1, wherein a distance between the first flat plate and the second flat plate is longer than a distance from a tip of the first fin to a portion of the portion facing the tip of the second flat plate. .   The distance from the tip of the first fin to the second flat plate at a portion facing the tip is equal to the distance from the tip of the second fin to the first flat plate at a portion facing the tip. Or the opposing tandem fin structure of 2.   The distance from the tip of the first fin to the second flat plate at a portion facing the tip is shorter than the distance between the adjacent first fin and the second fin. The opposing tandem fin structure according to any one of the above.   Section of the space surrounded by the first flat plate, the second flat plate, the first fin, and the second fin in a cross section intersecting with the extending direction of the first fin row and the second fin row. The area is wider than the cross-sectional area of the space between the tip of the first fin and the second flat plate in the cross section intersecting the direction in which the first fin row and the second fin row extend. The opposing tandem fin structure according to claim 1.   The first fin row and the second fin row are divided so as to intersect the extending direction of the first fin row and the second fin row, and the first fin and the second fin are scattered. The plurality of first fins facing each other across the divided portion of the first fin row are arranged in steps, and a plurality of the first fin rows facing each other across the divided portion of the second fin row The opposing tandem fin structure according to any one of claims 1 to 5, wherein the second fins are arranged in steps.   The plurality of first fins facing each other across the divided portion of the first fin row sandwich the second fin between the divided portions, and the divided portion of the second fin row The opposing tandem fin structure according to claim 6, wherein a plurality of the second fins facing each other with the first fin sandwiched between the divided portions.   A cooling device using the opposing tandem fin structure according to any one of claims 1 to 7, wherein the first fin row and the second fin row are blown in a direction in which the first fin row extends and the first fin row extends. The cooling device provided with the ventilation fan which cools a flat plate and a said 2nd flat plate.   A first flat plate, a second flat plate disposed opposite to the first flat plate, and a plurality of first fins formed at predetermined intervals, respectively, the tip of the first fin and the second flat plate There is a space between the first fin row and the first fin row in which the base end of the first fin is in contact with the first flat plate or integrated with the first flat plate, with a predetermined distance between each. The second fins are alternately arranged with the first fins, and there is a space between the tip of the second fin and the first flat plate, and the base end of the second fin is the second flat plate. A second fin array that is in contact with or integrated with the second flat plate, and a first heat generation that is placed on or in contact with the surface of the first flat plate opposite to the surface facing the second flat plate And a surface of the second flat plate opposite to the surface facing the first flat plate. Or the 2nd heating element which contacted, and the ventilation fan which ventilates with respect to the direction where the 1st fin row and the 2nd fin row extend, and the wind speed of the ventilation by the blower fan is the 1st flat plate. The cooling device is characterized in that the space between the tip of the first fin and the second flat plate is earlier than the portion surrounded by the second flat plate, the first fin and the second fin. .   Section of the space surrounded by the first flat plate, the second flat plate, the first fin, and the second fin in a cross section intersecting with the extending direction of the first fin row and the second fin row. The area is wider than the cross-sectional area of the space between the tip of the first fin and the second flat plate in the cross section intersecting the direction in which the first fin row and the second fin row extend. The cooling device according to claim 9.   The first fin row and the second fin row are divided so as to intersect the extending direction of the first fin row and the second fin row, and the first fin and the second fin are scattered. The plurality of first fins facing each other across the divided portion of the first fin row are arranged in steps, and a plurality of the first fin rows facing each other across the divided portion of the second fin row The cooling device according to claim 9 or 10, wherein the second fins are arranged in steps.   A first flat plate, a second flat plate disposed opposite to the first flat plate, and a plurality of first fins formed at predetermined intervals, respectively, the tip of the first fin and the second flat plate There is a space between the first fin row and the first fin row in which the base end of the first fin is in contact with the first flat plate or integrated with the first flat plate, with a predetermined distance between each. The second fins are alternately arranged with the first fins, and there is a space between the tip of the second fin and the first flat plate, and the base end of the second fin is the second flat plate. A second fin row that is in contact with or integrated with the second flat plate, and a plurality of third fins that are formed at predetermined intervals, and the tip of the third fin and the second flat plate There is a space between them, and the base end of the third fin is in contact with the first flat plate or in front A plurality of third fin rows integrated with the first flat plate, and a plurality of fourth fins formed at predetermined intervals, and arranged alternately with the third fins, the tip of the fourth fin and the A space between the first flat plate and a fourth fin row in which a base end of the fourth fin is in contact with or integrated with the second flat plate; And the fourth fin row are arranged in the same straight line, and the second fin row and the third fin row are arranged in the same straight line.   The cooling device using the opposing tandem fin structure according to claim 12, wherein the first fin row and the second fin row are arranged in a direction in which the third fin row and the fourth fin row extend. A cooling device including a blower fan that blows air to cool the first flat plate and the second flat plate.   A first flat plate, a second flat plate disposed opposite to the first flat plate, and a plurality of first fins formed at predetermined intervals, respectively, the tip of the first fin and the second flat plate There is a space between the first fin row and the first fin row in which the base end of the first fin is in contact with the first flat plate or integrated with the first flat plate, with a predetermined distance between each. The second fins are alternately arranged with the first fins, and there is a space between the tip of the second fin and the first flat plate, and the base end of the second fin is the second flat plate. A second fin row that is in contact with or integrated with the second flat plate, and a plurality of third fins that are formed at predetermined intervals, and the tip of the third fin and the second flat plate There is a space between them, and the base end of the third fin is in contact with the first flat plate or in front A plurality of third fin rows integrated with the first flat plate, and a plurality of fourth fins formed at predetermined intervals, and arranged alternately with the third fins, the tip of the fourth fin and the A space exists between the first flat plate, a fourth fin row in which a base end of the fourth fin is in contact with or integrated with the second flat plate, and the first fin in the first flat plate. 2 The first heating element placed on or in contact with the surface opposite to the surface facing the flat plate, and the surface opposite to the surface facing the first flat plate in the second flat plate Or the 2nd heat generating element which contacted, and the ventilation fan which ventilates with respect to the direction where the 1st fin row and the 2nd fin row extend, and the wind speed of the ventilation by the blower fan is the first. A portion surrounded by a flat plate, the second flat plate, the first fin, and the second fin The space between the tip of the first fin and the second flat plate is faster than that of the first flat plate, the second flat plate, the third fin, and the second fin. The cooling device characterized in that the space between the tip of the third fin and the second flat plate is earlier than the portion surrounded by the four fins.

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