JP5129719B2 - Laminated louver device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a louver device having a large number of louver-like cut-and-raised portions cut and raised from a plate surface of a metal plate, particularly a louver device that is preferably used mainly for heat dissipation, such as a heat exchanger and a heat sink. It is about.

  A heat release member for releasing heat to a cooling fluid such as air or water, such as a heat exchanger or a heat sink, such as a fin, is a so-called louver formed by cutting a part of the plate surface of a metal plate in an inclined manner. In some cases, a louver having a large number of parallel cut-and-raised portions formed in parallel is used. In this type of louver, the surface of the louver-like cut-out portion is used as a passage through which a cooling fluid such as air or water for cooling passes between adjacent louver-like cut-out portions. The heat dissipation efficiency is increased by increasing the area of the portion in contact with the flow.

  In manufacturing this type of louver, generally, a metal plate is usually pressed to form a cut and raised portion, and the shape of a conventional conventional louver is shown in FIGS.

  In FIG. 8 and FIG. 9, a large number of elongated raised portions 2 are formed in a portion excluding the region 1 </ b> A in the vicinity of both ends of the metal plate 1 having a rectangular shape, that is, in a portion inside the vicinity of both ends of the metal plate 1. However, the space between the adjacent raised portions 2 is formed as a passage 3 through which the cooling fluid passes.

  In addition, as a conventional general louver, the cut-and-raised part 2 is cut and inclined only on one side of the metal plate 1 (that is, only one end in the inclined direction is separated from the base plate) There are two types, one that is cut and raised on both sides of the metal plate 1 (that is, both ends in the inclined direction are separated from the base plate). Further, it is assumed that the both ends in the inclined direction are cut and raised from the base plate.

  With respect to the louvers as described above, various measures have been tried in the past in order to enhance the heat dissipation effect. Examples thereof are shown in Patent Document 1 and Patent Document 2.

  In the proposal of Patent Document 1, as the corrugated fins having louvers, the flow of the cooling fluid is changed by changing the erection angles (inclination angles) of the louver-like erection parts formed in parallel. To increase the heat dissipation effect.

Moreover, in the technique of patent document 2, about the louver as a fin of a heat exchanger, the change in the flow of the cooling fluid is performed by changing the inclination angle of each louver-shaped cut-and-raised part in the middle of the cut-and-raised part. To increase the heat dissipation effect.
Japanese Utility Model Laid-Open No. 1-111964 Japanese Patent Laid-Open No. 62-147290

  In the conventional louvers as described above, there is a limit to enhancing the heat dissipation effect due to the structure.

  That is, as already described, since the louver-like cut-and-raised portion is cut and raised from a single metal plate, the length L1 of one louver-like cut-and-raised portion 2 as shown in FIG. Must be the same as the cut and raised pitch P. This is because the length L2 of the parallel part of the pair of adjacent louver-like cut-and-raised portions 2 (the length of the cooling fluid passage 3 defined by the adjacent louver-like cut-and-raised portions 2) L2 is restricted by the pitch P. Means that

  In the louver as a heat radiating member, the cooling fluid passes close to the surface of the louver-like raised portion 2 by passing through a narrow passage 3 between a pair of adjacent louver-like raised portions 2. Therefore, heat transfer from the metal of the louver to the fluid is performed, and therefore, in order to enhance the heat dissipation effect, the length of the parallel portion of the adjacent louver-like raised portions 2 (length of the fluid passage 3) It is effective to increase L2. However, since the parallel part length L2 of the louver-like cut-and-raised part 2 is restricted by the pitch P as already described, it cannot be made longer than a certain extent.

  Such a situation is the same in the techniques proposed in Patent Document 1 and Patent Document 2 described above. That is, even in the techniques proposed in Patent Document 1 and Patent Document 2, a large number of louver-like cut-up portions are basically cut up from a single metal plate by press working.

  In addition, the parallel part length L2 between adjacent louver-like cut-out portions is changed without changing the basic structure of cutting and raising a large number of louver-like cut-out portions from one metal plate as described above. As a measure for increasing the size, it is conceivable to increase the inclination angle θ of the cut-and-raised portion. In this case, the distance between the cut-and-raised portions on both sides becomes large, and the fluid passage between the cut and raised portions. In practice, it is difficult to sufficiently increase the heat dissipation effect by this method.

  The present invention has been made against the background described above, and the length of the louver-like cut and raised portion is made sufficiently large without being restricted by the pitch and without excessively increasing the inclination angle. An object of the present invention is to provide a louver device that sufficiently increases the length of the parallel portion of adjacent louver-like cut-and-raised portions (the passage length of the cooling fluid), thereby sufficiently enhancing the heat dissipation effect. Is. Another object of the present invention is to provide a method for manufacturing a louver device having a large heat dissipation effect as described above without causing a significant increase in cost.

  In order to solve the problems as described above, in the louver device of the present invention, basically, a plurality of louver base plates each having a louver-like cut-and-raised portion are overlapped to form a laminated structure as a whole, and The front end surfaces of the louver cut and raised portions of the overlapped louver base plate are abutted with each other to form a substantially continuous plane.

  Specifically, the laminated louver device according to the first aspect of the present invention has a plurality of louver base plates each made of a metal plate, and each louver base plate has a part of each plate surface. The plurality of louvers are formed in parallel so that both end sides in the inclined direction are separated from the plate surface, and a plurality of louver-like raised portions are formed in parallel on both sides of the louver base plate. The front plates are overlapped so that the overall plate surfaces are parallel, and the tip surfaces of the louver-like raised portions are butted against each other between the stacked louver base plates. The louver-shaped cut-and-raised portion of each louver base plate is configured to form a substantially continuous plane between the plurality of louver base plates stacked together. is there.

  The laminated louver apparatus according to the invention of claim 2 is the laminated louver apparatus according to claim 1, wherein a surface of a substantially flat region in which the louver-like cut-and-raised portion is not formed in each of the louver base plates. The plurality of louver base plates are superposed so that they are in close contact with each other.

  Furthermore, the laminated louver device of the invention of claim 3 is the laminated louver device of claim 2, wherein two louver base plates are used as a plurality of louver base plates, one louver base plate and the other louver base plate With the louver base plate, the shape and dimensions of the louver-like cut-and-raised portion are the same, and about the cut-and-raised end surface on one plate surface side of each louver-like cut-and-raised portion in each louver base plate, The center position of the end face is determined so as to be located in the extended surface of the surface of the flat region that does not form the louver-like cut-and-raised portion of the louver base plate, and the two louver base plates The cut and raised end faces on the plate surface side are overlaid so as to face each other.

  On the other hand, in the manufacturing method of the laminated louver device of the invention of claim 4, the both sides of the inclination direction are inclined on both surfaces of the louver base plate from a plurality of locations on the plate surface of the metal plate. A number of louver-shaped raised parts are formed in parallel by cutting, creating a louver base plate, and a plurality of louver base plates are prepared. The louver-shaped raised portions of a plurality of louver base plates are placed between each louver base plate so that the front end surfaces of the louver are abutted against the tip surfaces of the louver-shaped cut-out portions of the other louver base plates. Is a substantially continuous plane.

  According to a fifth aspect of the present invention, there is provided a laminated louver device manufacturing method according to the fourth aspect of the present invention, in which a plurality of louver base plates are overlapped with each other when the louver base plates are overlapped. The surfaces of substantially flat regions where no raised portions are formed are overlapped so that they are in close contact with each other.

  Further, the manufacturing method of the laminated louver device according to the invention of claim 6 is the manufacturing method of the laminated louver device according to claim 5, wherein the louver-like cut and raised portion is formed when the louver-like cut and raised portion is formed on the metal plate. The louver origin is determined by setting the cut-and-raised position of the louver-shaped cut-out part so that the center position of the end face on one plate surface side of the part is located on the extended surface of the surface of the original metal plate. Create a plate and prepare two louver base plates, and superimpose these two louver base plates so that the end faces on the one plate surface side of the louver-shaped raised portion face each other. It is characterized by.

  In the laminated louver device of the present invention, basically, a plurality of louver base plates each having a louver-like cut-and-raised portion are overlapped, and between the overlapped louver base plates, The ends of the louver-like cut-and-raised parts are abutted to form a substantially continuous plane. Therefore, if considered as a louver device having an overall laminated structure, the louver-like cut-and-raised parts The length of the ridge portion is a length obtained by multiplying the length of the cut and raised portion of one louver base plate by the number of superimposed louver base plates. It becomes much longer than the length of the part. This means that the overall length of the parallel portions of adjacent louver cuts (ie, the overall length of the cooling fluid passage defined by the adjacent cuts) is raised. Therefore, the length of the cooling fluid passage between adjacent louver-like cut-and-raised portions can be made much longer than before, and the heat dissipation effect can be sufficiently enhanced.

  Further, it is not necessary to increase the inclination angle of the cut-and-raised portion in order to increase the parallel part length (passage length) of the louver-like cut-and-raised portion. The space between the parts (the width of the fluid passage) becomes large, and on the contrary, the heat radiation effect is not adversely affected.

  Furthermore, in the laminated louver device according to the second aspect of the present invention, a substantially flat region in which each louver base plate does not have a louver-like cut-and-raised portion (for example, near or at both ends of the louver base plate). Since multiple louver base plates are overlaid so that they are in close contact with each other, positioning of the tips of the louver-like cut-out portions of the overlaid louver base plates is facilitated. It is easy to configure the louver-like cut-and-raised portions correctly between the plates so that the cut-and-raised portions form a continuous plane.

  In the laminated louver device according to the third aspect of the present invention, it is sufficient that the shape of the louver-shaped raised portions in the two louver base plates constituting the louver device is exactly the same. When creating a plate by pressing or the like, it is only necessary to create a single shape. Therefore, the number of processing steps can be reduced and the number of types of dies can be reduced, so that the manufacturing cost can be greatly reduced. it can.

  Furthermore, according to the manufacturing method of the invention of Claims 4-6, the laminated louver apparatus which has the outstanding performance as mentioned above can be actually manufactured stably.

  1 and 2 show a first embodiment of the laminated louver device of the present invention. Here, FIG. 1 shows each louver base plate 5A, 5B, 5C used in the laminated louver device of the first embodiment, and FIG. 2 shows these three louver base plates 5A, 5B, A state where a louver device having a laminated structure as a whole is shown by superimposing 5C. The planar shape of each louver base plate 5A, 5B, 5C may be substantially the same as the planar shape of the conventional louver shown in FIGS.

  In FIG. 1, each of the louver base plates 5A, 5B, 5C is composed of a metal plate 1 having a rectangular shape as a whole, and a large number of inclined louver-like cut-and-raised portions 2 are arranged in parallel on the metal plate 1. The louver base plates 5A, 5B, and 5C are formed by forming them in a shape.

  Here, the louver-like cut-and-raised portion 2 in each of the louver base plates 5A, 5B, and 5C is a region excluding both ends 1A or the peripheral portion of the metal plate 1, that is, an inner region, and both end sides in the inclined direction are the base plates. It is formed in the same manner as the cut and raised portion 2 shown in FIGS. The pitch P and the inclination angle θ of the louver-like cut-and-raised portions 2 in the louver base plates 5A, 5B, and 5C are all the same. Further, the length L1 of each louver cut-and-raised portion 2 in each louver base plate 5A, 5B, 5C is inevitably the same as the pitch P.

  The material of the metal plate 1 is typically aluminum or an aluminum alloy, but is not limited thereto, and may be, for example, a simple substance such as copper, iron, magnesium, titanium, or an alloy, stainless steel, or the like. When used for heat dissipation applications such as heat exchangers and heat sinks, it is preferable to use aluminum, copper, or alloys thereof having high thermal conductivity.

  Further, the thickness of the metal plate 1 constituting each of the louver base plates 5A, 5B, 5C is not necessarily the same, but there is a step at the butting portion of the louver-like cut-and-raised portion 2 in a stacked state as will be described later. In order to prevent the occurrence, it is desirable that all have the same thickness.

  Furthermore, the method for forming a large number of louver-like cut-and-raised portions 2 on each metal plate 1 is not particularly limited, but it is desirable to apply press working from the viewpoint of cost and the like. Die-casting is also applicable.

  In assembling the laminated louver device of the present invention using the three louver base plates 5A, 5B, and 5C shown in FIG. 1 as described above, as shown in FIG. 2, these three louver base plates 5A are used. 5B and 5C are overlapped to form an integrated laminated louver device as a whole. Here, when the three louver base plates 5A, 5B, and 5C are overlapped, between the pair of overlapping louver base plates, the front end surface of the cut and raised portion 2 of one louver base plate and the other louver base It overlaps so that the front end surface of the cut-and-raised part 2 of a board may contact | connect (namely, front-end | tips will face | match). By doing in this way, if the pitch P and the inclination angle θ of each louver-like cut-and-raised portion 2 are the same, the louver-like cut-and-raised portions 2 of the louver base plates 5A, 5B and 5C are substantially real as a whole. Thus, a continuous plane is formed. Therefore, considering the three louver base plates 5A, 5B, and 5C as a whole, the length LP1 of the louver-like cut-and-raised portion 2 is equal to the cut-and-raised portion length L1 of one louver base plate. Three times (ie, 3 × L1). As a result, the length of the entire parallel portion of the adjacent louver-like cut-out portions 2 (that is, the length of the cooling fluid passage 3 defined by the adjacent louver-like cut-out portions) LP2 depends on the inclination angle. Although it is different, it greatly exceeds three times the length L2 of the parallel portion of the cut-and-raised portion 2 in one louver base plate.

  As described above, by stacking the three louver base plates 5A, 5B, and 5C to form a laminated structure, the parallel portion length (fluid passage length) LP2 of the adjacent louver-like cut-and-raised portions 2 is reduced. As a result, the cooling fluid passing through the fluid passage 3 flows significantly along the cut-and-raised part, so that a significantly higher heat dissipation effect can be obtained. It becomes.

  When the three louver base plates 5A, 5B, and 5C are overlapped, the portions of the louver base plates 5A, 5B, and 5C that are not formed with the louver-like raised portions 2 (usually both end portions 1A or the periphery) Of course, spacers may be appropriately disposed between the two parts, and the spacers may be sandwiched and overlapped. In this case, the spacer is preferably made of the same material as the louver base plate, but is not necessarily limited thereto.

  In addition, the abutment surface of the louver-like cut-and-raised portion 2 between the stacked louver base plates does not necessarily have to be particularly bonded or bonded, but depending on the case, brazing, soldering, or adhesive between the two Of course, bonding and joining may be performed by such means.

  1 and FIG. 2 show the case where three louver base plates are overlapped, of course, in the case of this first embodiment, it is of course possible to overlap two or four or more. .

  3 and 4 show a second embodiment of the present invention. 3 shows three louvers 5D, 5E, and 5F used in the second embodiment, and FIG. 4 shows a laminated type in which these three louver base plates 5D, 5E, and 5F are overlapped. The state made into the louver apparatus is shown.

  In FIG. 3, each of the louver base plates 5D, 5E, and 5F is formed with a large number of louver-like cut-and-raised portions 2 formed in parallel from the metal plate 1 in the same manner as in the first embodiment. Has been. Here, the pitch P and the inclination angle θ of the louver-like cut and raised portions 2 in the louver base plates 5D, 5E, and 5F are the same, and the thicknesses of the metal plates 1 are also the same. However, although the cut-and-raised positions of the louver-like cut-out portions 2 with respect to the overall plate surface of the metal plate 1 in the louver base plates 5D and 5F on both sides (the uppermost surface side and the lowermost surface side) are the same, The cut-and-raised position of the louver-like cut-and-raised portion 2 with respect to the overall plate surface of the metal plate 1 in the louver base plate 5E is slightly different.

  That is, the louver-like cut-and-raised portion 2 of the uppermost louver base plate 5D has a maximum pull-in depth D1 with respect to the lower surface 1B of the metal plate 1 constituting the louver base plate 5D, which is an intermediate louver base plate 5E. In the louver-like cut-and-raised part 2, the cut-and-raised position is determined so as to be the same as the maximum protruding height H1 with respect to the metal plate upper surface 1C. Further, the louver-like cut-and-raised portion 2 of the lowermost louver base plate 5F has a maximum pull-in depth D2 with respect to the upper surface 1C of the metal plate 1 constituting the louver base plate 5F. The cut-and-raised position is determined so as to be the same as the maximum protrusion height H2 with respect to the metal plate lower surface 1B in the louver-like cut-and-raised portion 2.

  Such three louver base plates 5D, 5E, and 5F are overlapped as shown in FIG. 4 to constitute a laminated louver device as a whole.

  Here, as shown in FIG. 4, the three louver base plates 5D, 5E, and 5F are substantially flat regions (usually the metal plate 1) that do not form the louver-like raised portions 2 in the metal plate 1. Are overlapped so that the two end portions 1A or the peripheral portion thereof are in close contact with each other. At this time, since the maximum protrusion heights H1 and H2 and the maximum pull-in depths D1 and D2 of the louver cut-and-raised portions on the respective surfaces of the louver base plates 5D, 5E and 5F are determined as described above, If the area | region which does not form the cut-and-raised part 2 is closely_contact | adhered, the front-end | tips of the louver-like cut-and-raised part 2 will also touch closely between each louver baseplate. That is, in the same manner as described in the first embodiment, the cut-and-raised portions 2 of the louver base plates 5D, 5E, and 5F are abutted between the louver base plates that are vertically overlapped, and these are substantially A continuous plane is formed, and a long parallel portion (fluid passage 3) is formed as a whole.

  Here, when the three louver base plates D, 5E, and 5F are overlapped in close contact, the three louver base plates D, 5E, and 5F are basically not particularly required to be joined. May be positioned so that the tip surfaces of the louver-like cut and raised portions 2 are in contact with each other, but in some cases, it is of course possible to join and adhere so that the close contact portions are integrated. For example, by applying mechanical coupling means such as doweling, caulking, etc. using parts that are not brazed, soldered, glued, or louvered raised parts, May be joined. When applying brazing, a brazing material prepared separately from the metal plate 1 may be used, or a so-called brazing sheet in which a brazing material layer is previously formed on one side or both sides may be used as the metal plate 1. Furthermore, as for the area of the portion where the louver base plates are joined to each other, as long as the abutted louver-like cut-out portions 2 are not misaligned, only a part of the contact portion may be joined. good. Further, the abutting portions between the cut and raised portions are not particularly bonded or bonded, or may be bonded or bonded by the above-described means.

  In the case of the second embodiment shown in FIGS. 3 and 4, the louver base plates 5 </ b> D, 5 </ b> E, and 5 </ b> F have regions that do not form the louver-like raised portions 2 (for example, both end portions 1 </ b> A). Since it adheres, it becomes easy to position so that the front end surfaces of the louver-shaped cut portions 2 of the overlapping louver base plates can be butted accurately. Moreover, since the thickness increases as a whole and the overall strength increases, it can withstand handling, transportation, processing, and the like after assembly. Other effects are the same as those of the first embodiment shown in FIGS.

  3 and 4, the example in which the three louver base plates 5D, 5E, and 5F are overlapped has been described. However, in the case of the second embodiment, two or four or more louver base plates are used. Of course, it is also possible to superimpose.

  5 to 7 show a third embodiment of the laminated louver device of the present invention. Here, FIG. 5 shows two louvers 5G and 5H used in the laminated louver device of the third embodiment, and FIG. 6 shows the superposition of these two louver base plates 5G and 5H. FIG. 7 shows the overall state of the laminated louver device.

  In FIG. 5, each louver base plate 5G, 5H is raised from the metal plate 1 so that both sides in the inclined direction are separated from the base plate, as in the case of the first and second embodiments. A large number of louver-like cut-and-raised portions 2 are formed in parallel.

  Here, the pitch P, the inclination angle θ, and the length L1 of the louver-like cut-and-raised portion 2 in each of the louver base plates 5G and 5H are the same, and the louver-like cut-and-raised portion 2 with respect to the plate surface of the metal plate 1 The cut-and-raised positions are also the same, and the thickness of the metal plate 1 is also the same. That is, the two louver base plates 5G and 5E including the cut-and-raised portion 2 have substantially the same shape and the same dimensions as a whole.

  The cut-and-raised position of the louver base plates 5G and 5H with respect to the overall plate surface of the metal plate 1 is the tip surface of the louver-like cut-and-raised portion 2 on one surface of the metal plate 1 (for example, the lower surface 1B side). The center position O is located within the extended surface of the overall plate surface of the metal plate 1 (substantially flat region in which the cut-and-raised portion 2 is not formed, for example, both end portions 1A or peripheral plate surfaces) 1B. It is stipulated to do. Thus, by setting the cut-and-raised position of the louver-like cut-and-raised portion 2, when the two louver base plates 5G and 5H are turned upside down and overlapped, the louver-like shape will be described later. It is possible to correctly match the front end surfaces of the cut and raised portions 2.

  By laminating the two louver base plates 5G and 5H having the same shape as described above as shown in FIGS. 6 and 7, a laminated louver device is configured as a whole. However, the two louver base plates 5G and 5H have the same shape, but when they are overlapped, as can be understood from FIG. 6, one louver base plate (for example, the lower louver base plate 5H) is moved up and down. Invert and superimpose. By doing so, the upper and lower louver base plates 5G and 5H are moved to a region other than the louver cut-and-raised portion 2 (substantially flat portions, usually both end portions 1A of the metal plate 1 or peripheral portions. ), And the front end surfaces of the louver-like cut-and-raised portions 2 can be closely butted together between the upper and lower louver base plates 5G and 5H.

  It should be noted that the adhesion, the necessity of the bonding, and the unnecessary for bonding the two louver base plates 5G, 5H, and the means for bonding and bonding are the same as those in the second embodiment already described.

  In such a third embodiment, since the two louver base plates constituting the laminated louver device need only have the same shape, it is only necessary to create one type of louver base plate, Therefore, the die cost is reduced, the number of processing steps is reduced, and the manufacturing cost can be greatly reduced as a whole. Other functions and effects are the same as those of the second embodiment already described.

  The laminated louver device of the present invention as described above can exhibit its effect most effectively when used for heat dissipation. For example, if one end of the laminated louver device of the present invention is thermally connected to a base plate to which heat generated from a heat source such as various electronic devices and electric devices is transmitted, The heat dissipation effect can be exhibited. Alternatively, even when a corrugate is formed by the laminated louver device of the present invention and used as a heat exchanger as a whole, a large heat exchange efficiency can be obtained. In addition, by increasing the number of laminated louver base plates (the number of stacked sheets), a narrow and long flow path can be formed between successive louver-like cut-and-raised parts. It can be used for applications that require flow paths, such as various filters and catalyst carriers.

  Examples of the present invention are shown below together with comparative examples (conventional examples). These examples are for explaining the effects of the present invention, and it is needless to say that the conditions such as dimensions and shapes described in the examples do not limit the technical scope of the present invention.

[Example 1]
Example 1 corresponds to the first embodiment described above (see FIGS. 1 and 2), and an aluminum plate having a thickness of 1 mm is prepared as the metal plate 1, and the pitch P is set by pressing. A large number of louver-like cut and raised portions 2 having a length of 4 mm, a length L1 of 4 mm, and an inclination angle θ of 30 degrees were formed in parallel to obtain three louver base plates 5A, 5B, and 5C. The specific cut-and-raised shape of the cut-and-raised portion 2 is as shown in FIG. These louver base plates 5A, 5B, and 5C are separated from each other by a distance between the entire plate surfaces (regions where the louver-like cut-and-raised portion 2 is not formed; in this embodiment, the distance between both end portions 1A of the metal plate 1). As shown in FIG. 2, the louver-like cut-and-raised portions 2 are brought into contact with each other so as to be 1 mm. When the three louver base plates 5A, 5B, and 5C are overlapped, aluminum spacers (not shown) having a thickness of 1 mm are alternately arranged and stacked on both end portions 1A of the metal plate 1, Combined with a stop.

  Further, a heat sink in which the louver base plates were firmly joined to each other via an aluminum spacer was manufactured by brazing the laminated louver device to the heat receiving plate. When this heat sink was evaluated, it was confirmed that a sufficient heat dissipation effect was obtained.

[Example 2]
Example 2 corresponds to the second embodiment described above (see FIGS. 3 and 4). An aluminum plate having a thickness of 1 mm is prepared as the metal plate 1, and the pitch P is 4 mm by press working. A large number of louver-like cut-and-raised portions 2 having a length L1 of 4 mm and an inclination angle θ of 30 degrees were formed in parallel to form three louver base plates 5D, 5E, and 5F. Here, the cut-and-raised positions of the louver-like cut-and-raised portions 2 in the respective louver base plates 5D, 5E, and 5F (maximum protrusion heights H1 and H2, maximum pull-in depths D1 and D2) are already in the second implementation. It is as having demonstrated the form.

  These louver base plates 5D, 5E, and 5F are bonded to each other by adhering to each other in the vicinity of both end portions 1A where the louver-like cut-and-raised portions 2 are not formed, and the laminated louver device shown in FIG. 4 is created. . In addition, it was confirmed that the front end surfaces of the louver-like cut-and-raised portions 2 are correctly abutted between the louver base plates 5D, 5E, and 5F.

  When the laminated louver device of Example 2 was processed into a corrugated shape and actually applied to a heat exchanger, it was confirmed that sufficient heat exchange efficiency could be exhibited.

[Example 3]
This Example 3 corresponds to the third embodiment (FIGS. 5 to 7) described above, and an aluminum plate having a plate thickness of 1 mm is prepared as the metal plate 1, and the pitch P is 4 mm by press working. A large number of louver-like cut-and-raised parts 2 having a length L1 of 4 mm and an inclination angle θ of 30 degrees were formed in parallel to form two louver base plates 5G and 5H. Here, the cut-and-raised positions of the louver-like cut-and-raised portions 2 in the two louver base plates 5G and 5H are exactly the same, and the tip surface of the louver-like cut-and-raised portion 2 on one surface of each metal plate is the same. The center position O was located on the extended surface of the surface of the flat portion of the metal plate (plate surfaces near both ends).

  These two louver base plates 5G and 5H are turned upside down as shown in FIG. 6 (that is, the surfaces defining the center position O of the tip surface of the louver-like cut-and-raised portion 2 as described above are mutually connected. A stacking louver device was made, with the surfaces facing each other. At this time, the regions where the louver-like cut-and-raised portions 2 in the two louver base plates 5G and 5H were not formed (near both end portions 1A of the metal plate 1) were stacked in close contact, and were joined by doweling. By brazing this laminated louver device to a heat receiving plate, a heat sink was produced in which the louver base plates were firmly joined together and the tip surfaces of the louver-like cut and raised portions 2 were in close contact with each other. When this heat sink was evaluated, it was confirmed that it had sufficient heat dissipation performance.

[Comparative example (conventional example)]
As a conventional general louver shown in FIG. 8 and FIG. 9, a large number of louver-like raised portions 2 are arranged in parallel on a 1 mm thick aluminum plate with a pitch of 4 mm, a length of 4 mm, and an inclination angle of 30 degrees by pressing. Formed into a shape.

  When such a louver was actually incorporated into a heat sink, it was found that only heat dissipation performance and heat exchange performance that were much inferior to those of Examples 1, 2, and 3 according to the present invention were obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic partial enlarged longitudinal sectional view of three louver base plates used in the first embodiment and Example 1 of the present invention. FIG. 2 is a schematic partial enlarged longitudinal sectional view of the laminated louver device according to the first embodiment (Example 1) of the present invention, in which the three louver base plates shown in FIG. 1 are superposed. It is a typical partial expanded longitudinal cross-sectional view of the three louver base plates used in 2nd Embodiment and Example 2 of this invention. FIG. 4 is a schematic partially enlarged longitudinal sectional view of a laminated louver device according to a second embodiment (Example 2) of the present invention in which three louver base plates shown in FIG. 3 are superposed. It is a typical partial expanded longitudinal cross-sectional view of the two louver base plates used in 3rd Embodiment and Example 3 of this invention. FIG. 6 is a schematic partial enlarged longitudinal sectional view of a laminated louver device according to a third embodiment (Example 3) of the present invention in which two louver base plates shown in FIG. 5 are overlapped. FIG. 7 is a schematic perspective view of the laminated louver device of the third embodiment (Example 3) shown in FIG. 6. It is a typical perspective view which shows an example of the conventional common louver. It is a typical enlarged longitudinal cross-sectional view in the IX-IX line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Metal plate 2 Louver-like cut and raised part 3 Passage path of cooling fluid 5A-5H Louver base plate

Claims (6)

Each has a plurality of louver base plates made of metal plates,
Each of the louver base plates has a plurality of louver-like cuts formed by cutting up a part of each plate surface on both sides of the louver base plate in an inclined manner so that both end sides in the inclined direction are separated from the plate surface. The shim is formed in parallel,
The plurality of louver base plates are superposed such that the entire plate surface is parallel,
In addition, between the stacked louver base plates, the end faces of the louver-like cut and raised portions are butted against each other,
Accordingly, the louver-shaped raised portion of each louver base plate is configured so as to form a substantially continuous plane between the plurality of louver base plates stacked together. Mold louver device. In the laminated louver device according to claim 1,
The plurality of louver base plates are overlapped so that the surfaces of substantially flat regions not forming louver-like cut-and-raised portions of the louver base plates are in close contact with each other. Laminated louver device. In the laminated louver device according to claim 2,
Two louver base plates are used as a plurality of louver base plates,
One louver base plate and the other louver base plate have the same shape and dimensions of the louver-like cut-and-raised part,
And about the cut-and-raised end surface on one plate surface side of each louver-like cut-out portion in each louver base plate, the center position of the end surface is flat without forming the louver-like cut-out portion in the louver base plate Determined to lie within the extension of the surface of the area,
The laminated louver device, wherein the two louver base plates are superposed such that the cut and raised end surfaces on the one plate surface side face each other.   A large number of louver-like raised parts are formed in parallel by cutting up on both sides of the louver base plate so that both ends in the inclined direction are separated from the base plate from multiple locations on the plate surface of the metal plate A louver base plate is prepared, and a plurality of louver base plates are prepared, and the tip surface of the louver-like cut-out portion of each louver base plate is the louver-like cut-out portion of another louver base plate. The louver-shaped raised portions of the plurality of louver base plates are substantially continuous planes between the louver base plates so as to be brought into contact with the front end surface. A method for manufacturing a laminated louver device. In the manufacturing method of the lamination type louver device according to claim 4,
When stacking a plurality of louver base plates, the louver base plates are stacked so that the surfaces of substantially flat regions not forming louver-like cut-and-raised portions are in close contact with each other. A manufacturing method of a mold louver device. In the manufacturing method of the lamination type louver device according to claim 5,
When forming the louver-like cut-out part on the metal plate, the louver so that the center position of the end face of one plate surface side of the louver-like cut-out part is located on the extended surface of the original metal plate surface A louver base plate is created by setting the cut and raised position of the cut and raised portion, and preparing two louver base plates. These two louver base plates are louvered and raised. A method of manufacturing a laminated louver device, wherein the end faces on the one plate surface side of the shim are overlapped so as to face each other.

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