JP5026881B2 - Plate laminate and manufacturing method thereof - Google Patents

Description

  The present invention relates to a plate laminate including a channel in which a plurality of plates having grooves are laminated and the grooves are closed, and a method for manufacturing the same.

  Such plate laminates are often used as heat exchangers for heat exchange, and such heat exchangers form multiple rows of channels in each plate using channels closed by overlapping plates, for example, upper and lower plates. To do. Then, the heat exchanger causes a high-temperature fluid to flow in a flow path of a certain layer and a low-temperature fluid to flow in a flow path of the upper and lower layers of the certain layer, so that the fluid passes through the flow path of the upper and lower layers. Heat exchange is performed (for example, Patent Document 1).

Japanese Patent Laid-Open No. 2003-262489 JP 2007-15873 A

  In general heat exchangers as well as the heat exchangers proposed in these patent documents, the bonding and fixing of the stacked plates greatly affects the sealing performance of the flow path. In addition, since the flow paths are in multiple rows, it is necessary to bond and fix the plates not only at the plate end but also at the central region of the plate. On the other hand, if a plurality of plates are stacked while being bonded and fixed one by one, productivity is lacking. For this reason, when manufacturing the heat exchanger, the plates are laminated in advance, and the plates are joined and fixed in the laminated state. Specifically, the plates are laminated after attaching silver brazing to the joining portions, and the lamination is performed. After pressing in the direction, the joining process is performed such as melting the silver solder or pressing the laminated plate and diffusion bonding the joints between the plates.

  When such a joining process is performed on the laminated plates, the laminated plates are pressed so as to be subducted to reduce the laminated dimensions of the unloaded laminated plates in order to ensure the sealing performance of the joining portions of the overlapping plates. Since the plate is subjected to such a pressing force as to cause the shrinkage of the stacking dimensions, the plate receiving this pressing force is in the direction intersecting the plate stacking direction, more specifically, the width of the heat exchanger that is the stacked plate. Deform to extend in the direction. If the plate pressing is continued with this deformation occurring, depending on the degree of the pressing force, the protrusions between the grooves may be buckled or deformed in a plate having grooves in multiple rows. For this reason, in order to constrain the extension in the width direction, the laminated plate has a side wall facing the side surface during pressing. FIG. 9 is an explanatory view showing a state of conventional plate pressing. As shown in FIG. 9, the plate unit SP on which a plurality of plates are stacked is restrained by side walls SK on both sides when the plate is pressed.

  By the way, although each plate included in the plate unit SP has its side surface restrained by the side wall SK, the plate unit SP receives the above-described pressing force and tends to be deformed so as to extend in the width direction. Deriving power. This reaction force is not uniform among the plates included in the plate unit SP, as indicated by arrows in FIG. That is, since the pressing force acts on the plate on the center side in the plate stacking direction of the plate unit SP, the reaction force increases because the degree of deformation that tends to extend in the width direction due to the pressing force increases. This reaction force becomes smaller as going to the end side in the stacking direction. The side walls SK on both sides resist the reaction force of each plate against the plate unit SP evenly in the width direction. Therefore, in each plate, the reaction force derived from each side has a different magnitude from the side wall SK. Will receive. For this reason, the plate unit SP includes a joining position between the plates that overlap each other, specifically, a joining state at the joining position between the top surface of the protrusion between the grooves and the plate, or a joining fixing state using silver solder. This can lead to a different situation on the plate. When such a situation occurs, there is a possibility that the above-described bonding failure and bonding fixing failure may occur, so the reliability of securing the sealing property of the flow path is lowered.

  The present invention has been made in order to solve the above-described problems with respect to a plate laminate applied to a heat exchanger provided with a flow path in layers, and an object thereof is to increase the reliability of securing the seal performance of the flow path. .

  In order to achieve at least a part of the above object, the present invention adopts the following configuration.

[Application 1: Manufacturing method of plate laminate]
A method of manufacturing a plate laminate comprising a plurality of plates having grooves and a flow path formed by overlapping plates and the grooves,
A laminating step of laminating a plurality of the plates;
An arrangement step of arranging a side wall so that an end portion of the laminated plate is placed in a lamination direction across a plurality of plates;
A press bonding step of pressing the stacked plates in the stacking direction and bonding overlapping plates;
The gist of the side wall is that the surface facing the laminated plate is concavely curved.

  In this case, it is desirable that the concave curved surface of the side wall has a larger degree of recess toward the center region in the plate stacking direction of the stacked plate.

[Application 2: Plate laminate]
A plate laminate in which a plurality of plates are laminated,
A plurality of the plates having grooves are stacked and bonded and fixed, and the grooves are closed between the bonded plates to form a flow path,
The gist is that the side surface of the laminated plate is curved outwardly.

  In this case, the side surface of the laminated plate may be curved outward so that the degree of convexity becomes larger in the central region of the laminated plate in the plate lamination direction.

  In the plate laminate described above, when forming a flow path with the overlapping plates and grooves in the stacked plates in which a plurality of plates having grooves are stacked, the stacked plates are pressed in the stacking direction to join the overlapping plates. The channel is a closed channel. And when pressing such a plate, the side wall is arranged at the end of the laminated plate, and this side wall extends over the plurality of plates along the laminated plate end in the laminating direction. It faces the end (side) of. Therefore, the laminated plate is constrained by the side wall in a direction intersecting the plate lamination direction.

  Each of the stacked plates is deformed so as to extend toward the side wall under the pressing force accompanying the plate pressing along the stacking direction, and this extension causes the reaction force toward the side wall to be derived by contacting the side wall. . The degree of extension and the reaction force derived from this extension in each plate of the laminated plates are not uniform as described above with reference to FIG. Accordingly, the reaction force increases because the degree of deformation that tends to extend in the width direction increases, and the reaction force decreases as it goes toward the end in the stacking direction.

  However, the side wall for constraining the laminated plate described above has a concave curved surface that is concave with respect to the side surface of the laminated plate on the side facing the side surface of the laminated plate. The extension of the plate until each plate of the laminated plate comes into contact with the curved surface depends on the degree of the concave in the concave curved surface. In particular, when the concave curved surface is a curved surface in which the degree of the concave becomes larger in the central region of the laminated plate in the plate stacking direction, each plate of the laminated plate is placed on the concave curved surface of the side wall. The extension of the plate until contacting is larger as the plate is closer to the center in the plate stacking direction and is smaller toward the end in the stacking direction. For this reason, since the extension until it contacts with a side wall and is restrained differs as mentioned above, the reaction force which each plate of a laminated | stacked plate derives toward a side wall is equalized. As a result, it is possible to equalize the bonding state at the bonding point between the stacked plates and the bonding fixed state by silver brazing etc. in the plates of each layer included in the laminated plate, so that the bonding failure or bonding at the bonding point The effectiveness of suppressing improper fixing is enhanced, and the reliability of securing the sealing property of the flow path can be increased.

  When the above-described plate laminate is applied as a heat exchanger, the heat exchanger may have multiple rows of flow paths in layers, so the plates with multiple rows of grooves are laminated, The top surfaces of the ridges forming the grooves are bonded to the opposing plates, and the stacked plates are pressed to bond and fix the top surfaces of the ridges to the plates. As a result, the multiple rows of grooves are closed to form flow paths, and the flow paths are formed in layers. And in such a heat exchanger, the joint location between the plates described above becomes the joint location between the top surface of the ridges between the grooves between the stacked and overlapped plates and the plate. It is possible to increase the effectiveness of suppressing the improper bonding and improve the reliability of securing the sealing property of the flow path.

  Then, in the laminated plate constrained by the side wall having the concave curved surface curved as described above, the side surface is curved outward so that the degree of convexity becomes larger toward the central region in the plate lamination direction of the laminated plate. Will do. Further, in the case of a plate laminated body having a side wall and a laminated plate, in this plate laminated body, the side wall conforms to the curvature of the side surface of the laminated plate curved outward and is concave with respect to the side surface. The concave curved wall surface is provided, and the concave curved wall surface is in close contact with the side surface of the laminated plate.

  The plate laminate described above can be configured as follows. For example, when the degree of depression of the concave curved surface of the side wall is deformed so that each plate included in the stacked plate receives a pressing force along the stacking direction and extends toward the concave curved curved surface. The degree of the concave is determined in accordance with the magnitude of the reaction force derived toward the concave curved curved surface. In this way, the reaction force derived from each of the stacked plates can be more equalized, so that the joining state and the joining fixed state at the joining portion described above can be further equalized, and the sealing performance of the flow path can be ensured. Reliability is also increased. In order to correspond to the magnitude of the reaction force in this way, the magnitude of the reaction force of each plate shown in FIG. 9 can be measured in advance, so that the concave curved surface can be easily formed into the concave shape corresponding to the measurement reaction force. The curve can be formed by determining the degree.

  The concave curved surface may be a flat surface within a predetermined range facing the one end side plate and the other end side plate in the stacking direction of the stacked plates. In this way, when pressing along the laminating direction, the plates on both ends are constrained by the plane range of the side wall, so that the subsidence of the laminated plate due to the pressing along the laminating direction is more reliably caused. Can do. Therefore, since the deformation | transformation of an inadvertent plate can be suppressed, it can also contribute to equalization of an above-mentioned joining state.

  Hereinafter, embodiments of the present invention will be described based on examples. FIG. 1 is a perspective view showing a schematic configuration of a heat exchanger 100 as an embodiment of the present invention, and FIG. 2 is an explanatory diagram for explaining the heat exchanger 100 in an exploded manner.

  As illustrated, the heat exchanger 100 includes side plates 130 and 140 on both sides of the plate unit 110. The plate unit 110 is a stacked body of plates, and includes a plurality of intermediate plates 116 stacked between the uppermost layer plate 112 and the lowermost layer plate 115. And this heat exchanger 100 forms the flow path 150 in multiple rows between the upper and lower plates which overlap in the plate unit 110, and has this multi-row flow path 150 in layers.

  As shown in FIG. 2, the uppermost layer plate 112 includes multiple rows of grooves 113, and includes protrusions 114 on both sides and between the grooves in order to form these grooves. Similarly, each of the intermediate plates 116 is provided with multiple rows of grooves 117, and substantially ridges 118 are provided between both sides and the grooves in order to form these grooves. The upper and lower intermediate plates 116 are the upper and lower plates of the lowermost plate 115 and the upper intermediate plate 116, and the upper plate 112 and the upper and lower plates of the lower intermediate plate 116 are the grooves of the intermediate plate 116. 117 and the groove 113 of the uppermost layer plate 112 are closed to obtain the flow path 150 described above. When forming such a flow path, the top surfaces of the above-mentioned ridges in each plate are bonded and fixed to the opposing plates as described later.

  One side plate 130 of the plate unit 110, together with the other side plate 140, surrounds the plate unit 110 along the plate stacking direction and faces the side surface of the plate unit 110. Since both the side plates face the side surface of the plate unit in this way, the plate unit 110 is constrained in a direction intersecting the plate stacking direction (lateral direction in this embodiment). Since the side plate 130 and the side plate 140 have the same configuration although there is a difference between the left and right sides, the side plate 130 will be described below.

  In the side plate 130, the wall surface facing the side surface of the plate unit 110 is a concave wall surface 132 that is concave with respect to the side surface of the plate unit 110, and the concave wall surface 132 is approximately the center region in the plate stacking direction of the plate unit 110. Provided as a curved surface with a large degree of recess. The manner in which the concave wall surface 132 is curved will be described later.

  In the present embodiment, as shown in FIGS. 1 and 2, the side plate 130 and the side plate 140 are set to have the same height as the plate unit 110. However, the height of both side plates is made lower than the height of the plate unit 110 in an unloaded state by simply stacking the uppermost layer plate 112, a predetermined number of intermediate plates 116, and the lowermost layer plate 115. Then, as will be described later, the plate unit 110 is pressed in the plate stacking direction in the manufacturing process to cause a reduction in the stacking dimension of the plate unit 110, so that the height of both side plates and the plate unit 110 is reduced by the stacking dimension reduction. It becomes almost the same.

  The heat exchanger 100 as a finished product shown in FIG. 1 and FIG. 2 has a side surface of the plate unit 110 in which a predetermined number of intermediate plates 116 are stacked between the uppermost layer plate 112 and the lowermost layer plate 115. A so-called barrel-shaped side surface curved outward so that the degree of convexity becomes larger in the central region in the plate stacking direction. Such bending of the side surface of the plate unit, that is, the outward bending of each of the plates constituting the unit, is a plate for bonding and fixing each plate to the top surface of the ridge to which the plate is bonded in the manufacturing process described later. It occurs by deforming to extend sideward by the pressing force received along the stacking direction. The heat exchanger 100 is configured such that the plate unit 110 is formed by the both side plates in a state where the concave wall surface 132 of the side plate 130 and the concave wall surface 142 of the side plate 140 are brought into close contact with the both barrel side surfaces of the plate unit 110. Is surrounded along the plate stacking direction.

  The heat exchanger 100 described above allows a high temperature fluid to flow through the multi-row flow path 150 of one layer of the upper and lower layers in which the multi-row flow paths 150 overlap each other in layers, and the multi-row flow of the other layer. By flowing a low-temperature fluid through the channel 150, heat exchange of the fluid passing through the upper and lower layer channels is performed. That is, the uppermost layer plate 112 having the grooves 113 and the intermediate plate 116 having the grooves 117 are used as heat transfer heat transfer plates. In this embodiment, in consideration of heat transfer and durability, each of the heat transfer plates is a metal plate, specifically a stainless plate.

  Next, the manufacturing process of the above-described heat exchanger 100 will be described. FIG. 3 is a process diagram showing a manufacturing process of the heat exchanger 100, FIG. 4 is an explanatory diagram showing a state of plate lamination in the heat exchanger manufacturing process, and FIG. 5 is an explanatory diagram showing a state of plate pressing in the heat exchanger manufacturing process. FIG. 6 is an explanatory view showing the heat exchanger 100 through the heat exchanger manufacturing process as viewed from the end.

  As shown in FIG. 3, first, a heat transfer plate is prepared (step S100). Specifically, an uppermost layer plate 112 having grooves 113, a predetermined number of intermediate plates 116 having grooves 117, and a lowermost layer plate 115 are prepared. Next, as shown in FIG. 4, the prepared heat transfer plates are placed between the side plate 130 and the side plate 140 that are in the retracted position so as to be separated from each other, and the lowermost layer plate 115, the intermediate plate 116, and the uppermost layer. The plates 112 are sequentially stacked in this order (step S110). When laminating the plates, silver brazing is applied in advance to locations where the upper and lower plates are joined, specifically, to the top surface of the ridges 114 in the uppermost layer plate 112 and to the top surface of the ridges 118 in the intermediate plate 116. . Alternatively, in step S100, each of the heat transfer plates coated with silver brazing is prepared on the top surface of the ridge and laminated. As shown in FIG. 3, the prepared plates, specifically, the uppermost layer plate 112, the lowermost layer plate 115, and the intermediate plate 116 therebetween are all plates having the same width. That is, the unloaded plate unit 110 has a higher stacking dimension than both side plates.

  After the plate stacking in step S110, in the stacked upper and lower plates, the ridges of the upper plate (the uppermost layer plate 112 or the intermediate plate 116), specifically, the top surfaces of the ridges 114 and 118 are , It is joined to the lower plate (intermediate plate 116 or lowermost layer plate 115) facing this. In this case, each ridge is joined to the plate with a coated silver solder interposed.

  Next, the side plate 130 and the side plate 140 are advanced by the plate holding jig (not shown) to the side of the plate unit 110 on which the plates are stacked (step S120). Thereby, both said side plates surround the plate unit 110 by which plate lamination was carried out, and make the curved surface of the concave wall surface 132 and the concave wall surface 142 face the side surface of the plate unit 110. In the present embodiment, the both side plates are advanced until the upper and lower ends in the drawing of the concave wall surface 132 and the concave wall surface 142 contact the side surface of the plate unit 110.

  Next, as shown in FIG. 5, the plate unit 110 surrounded by both side plates as described above is subjected to a joining process in which it is placed in a temperature environment in which the applied silver solder melts while pressing from above and below. (Step S130). Since the plates constituting the plate unit 110, that is, the uppermost layer plate 112 having a groove and the intermediate plate 116 are supported by the respective ridges by the plate pressing in the joining process, the height of the ridges is increased. Therefore, the plate unit 110 also shrinks its stacking dimensions. The reduction in the stacking dimensions of the plate unit 110 is the sum of the reductions in the height of the ridges on the uppermost layer plate 112 and the intermediate plate 116 supported by the ridges.

  Each plate of the plate unit 110 not only causes a reduction in the stacking dimensions due to such plate pressing, but also deforms so as to extend toward the concave wall surface 132 and the concave wall surface 142 on both sides under the pressing force. Each plate comes into contact with the concave wall surface 132 and the concave wall surface 142 by this extension and is restrained by both side plates, and continues to receive the pressing force during the joining process of step S130. Therefore, each plate of the plate unit 110 (the uppermost layer plate 112, the lowermost layer plate 115, and the intermediate plate 116 therebetween) follows the curved surfaces of the concave wall surface 132 and the concave wall surface 142 on both sides as shown in FIG. Curve both sides. As a result, the plate unit 110, which is a laminate of the plates, is brought into close contact with the concave wall surface 132 and the concave wall surface 142 after the side surfaces thereof are curved in a barrel shape as described above.

  During the joining process of step S130, the plate unit 110 causes the shrinkage of the stacking dimensions and the extension of both side plates toward the concave wall surface 132 and the concave wall surface 142, and the two concave wall surfaces of both side plates. It will be pressed after being restrained. Therefore, each heat transfer plate of the plate unit 110, specifically, the uppermost layer plate 112 and the intermediate plate 116 therebelow are joined to the top surface of the ridge 114 of the uppermost layer plate 112, and this top surface is joined to the top surface. Bonding and fixing are performed through melting of the coated silver solder and subsequent cooling process (step S140). The upper and lower intermediate plates 116, the lowermost layer plate 115 and the upper intermediate plate 116 are joined at the top surface of the ridge 118 of the upper intermediate plate 116, and the melted silver solder is applied to the top surface. And it joins and fixes through the subsequent cooling process (step S140).

  In the cooling step (step S140) after the joining process in step S130, the plate unit 110 is cooled until the silver wax is solidified while being pressed. Then, after the silver solder cooling, a plate holding jig (not shown) that has moved the side plate 130 and the side plate 140 forward is retracted. Thereby, the manufacturing process of the heat exchanger 100 is complete | finished.

  As described above, in the present embodiment, when the heat exchanger 100 is manufactured, the side plate 130 having the concave wall surface 132 that is concave with respect to the side surface of the plate unit 110 and the side plate 140 having the concave wall surface 142 are used. The plate unit 110 was surrounded, and the plate unit 110 was pressed in the stacking direction (see FIG. 5). As described above, each plate of the plate unit 110 is deformed due to the extension caused by the pressing, contacts the concave wall surface 132 and the concave wall surface 142 of both side plates, and bends both side surfaces following the curved surface of the concave wall surface. Therefore, the plate unit 110 is surrounded by both side plates by curving both side surfaces in a barrel shape so that the side surfaces are in close contact with the concave wall surface 132 and the concave wall surface 142 of both side plates.

  When each plate of the plate unit 110 causes the above-described extension to come into contact with the concave wall surface of the side plate, a reaction force accompanying the extension is exerted on the side plate 130 and the side plate 140. In the present embodiment, the side plate 130 and the side plate 140 have the concave wall surface 132 and the concave wall surface 142 that are more concave in the central region of the plate stack of the plate unit 110. The extension of the plate until the plates come into contact is larger as the plate is closer to the center in the plate stacking direction and is smaller toward the end in the stacking direction. For this reason, the plate on the center side in the plate stacking direction receives a large pressing force by pressing from above and below and increases the extent of extension, but is permitted until it is constrained by contacting the concave wall surfaces of both side plates. The extent of extension is also large. On the other hand, in the plate on the end side in the stacking direction from the plate in the stacking center side, the extent of extension due to the pressing force is reduced, and is allowed until it is constrained by contacting the concave wall surfaces of both side plates. The extent of extension is also reduced. As a result, as shown in FIG. 6, the reaction force that each plate of the plate unit 110 derives toward both side plates is equalized in the plate stacking direction. For this reason, in the joining position of the top surface of each protrusion 114 and the protrusion 118 between the plates stacked and overlapped in the plate unit 110 and the plate, the joining state and the joining and fixing state by silver soldering are determined in the plate lamination direction. Can be equalized in each layer of the plate unit 110 regardless of the position of the plate along the plate. Therefore, according to the present embodiment, it is possible to suppress the bonding failure and the bonding fixing failure at each joint portion between the top surface of the ridge for forming the flow channel 150 and the plate with high effectiveness. The reliability of ensuring sealing performance can be increased.

  In this embodiment, when the concave wall surface 132 and the concave wall surface 142 of the side plate 130 and the side plate 140 are curvedly formed, each plate included in the plate unit 110 receives the plate pressing force and extends toward the concave wall surface. When deformed, the degree of the concave was determined in accordance with the magnitude of the reaction force derived toward the concave wall surface, and a curve was formed. For example, as shown in FIG. 9, when the plate unit 110 is pressed using a side plate having a flat wall surface, the reaction force derived from each plate is experimentally measured in advance, and the obtained reaction force The concave wall surface 132 and the concave wall surface 142 were cut and formed in a curved shape on the side plate after determining the degree of depression accordingly. For this reason, in the present embodiment, the reaction force derived from each plate of the plate unit 110 can be more equalized, so that the joining state and the joining fixed state at the joining portion described above can be further equalized. The reliability of ensuring sealing performance can be further increased.

  In this case, depending on the number of stacked plates, the size, thickness, or material of the plate, the magnitude of the measured reaction force and the transition of the measured reaction force along the plate stacking direction are different. However, the reaction force derived from each plate of the plate unit 110 can be obtained in advance by an experimental method as described above, or by various methods such as simulation analysis by a computer. Therefore, even in heat exchangers with different number of stacked plates, plate size, thickness, or material, a curved curved concave wall surface corresponding to the reaction force of each plate can be formed. In the exchanger, the reliability of the flow path sealability can be improved.

  When the silver solder applied to the top surfaces of the convex ridges on both sides of each plate is melted in the joining process of step S130 and flows out from both side surfaces of the plate unit 110, it spreads between the plate unit side surface and the concave wall surface of the side plate. is expected. Therefore, the side plate 130 and the side plate 140 can be easily adhered and fixed to the plate unit 110 by solidification of the flowing silver wax.

  On the other hand, when silver brazing is applied to the top surfaces of the ridges on both sides of each plate, the degree of coating can be adjusted so that the plate unit 110 does not flow out from both sides. If it carries out like this, in the heat exchanger 100 obtained through step S140, the side plate 130 and the side plate 140 can be prevented from being fixed to the side surface of the plate unit 110. For this reason, since both side plates can be removed from the plate unit 110, the plate unit 110 itself which does not have a side plate can also be used as a heat exchanger.

  Next, another embodiment will be described. FIG. 7 is an explanatory diagram for explaining the schematic configuration of the heat exchanger 100A according to another embodiment. FIG. 8 is a view corresponding to FIG. 5 and shows the plate pressing in the heat exchanger manufacturing process according to another embodiment. It is explanatory drawing which shows a mode. As shown in the figure, this heat exchanger 100A is characterized by having flat wall portions 133 at the upper and lower ends of both side plates.

  That is, in the side plate 130A, a predetermined range of the upper end and the lower end side is a flat planar wall portion 133 that faces the side surface of the plate unit 110, and the wall surface therebetween is a curved concave wall surface similar to the concave wall surface 132 described above. 132A. The width of the planar wall portion 133 in the plate stacking direction is equal to or greater than the width corresponding to the height of the uppermost plate 112, and the stacking height of the uppermost plate 112 and a predetermined number (for example, one or two) of intermediate plates 116 is increased. The width is equivalent to the width. The same applies to the side plate 140A.

  The heat exchanger 100A of this embodiment has the following advantages. As shown in FIG. 8, when the plate unit 110 is pressed from above and below, the plate unit 110 shrinks the stacking dimensions as the sum of the dimensional shrinkage of each plate as described above, so-called plate sinking. Wake up. The heat exchanger 100A is configured such that the upper and lower plane walls 133 and the plane walls 143 of the side plate 130A and the side plate 140A face the side surfaces of the plates on the upper and lower ends of the plate unit 110, and the plate is formed on both plane walls. The upper and lower end plates of the unit 110 are restrained. Therefore, since the above plate depression due to the plate pressing can be made along the plate stacking direction, it is difficult to cause inadvertent displacement of the plate at the time of the sinking, and the plate pressing after the sinking is continued. Plate bonding can be achieved as described above. For this reason, in the heat exchanger 100A, since an inadvertent deformation of the plate accompanying the displacement of the plate can be suppressed, it is desirable from the viewpoint of equalization of the above-described joined state.

  The side plates 130A and 140A having the above-described flat wall portion 133 can have a height substantially the same as the stacked dimension of the plate unit 110 after the plate is pressed, and the height of the formation region of the concave wall surfaces 132A and 142A. It is also possible to make the height dimension substantially the same as the stacked dimension of the plate unit 110 after the plate is pressed. In this case, in the completed heat exchanger 100A, the upper and lower ends of the side plates 130A and 140A protrude from the plate unit 110 by the width of the flat wall portions 133 and 143. However, there is a particular problem in using the heat exchanger. There is no.

  The present invention is not limited to the above-described embodiments and modifications, and can be implemented in various modes without departing from the scope of the invention. For example, in the above-described embodiments, the stacking direction of the plates is the vertical direction, but the present invention can also be applied to a heat exchanger in which the plates are stacked in the horizontal direction. In addition, various kinds of brazing materials other than silver brazing can be used for joining and fixing the plates, and plates that overlap with each other by the diffusion joining method, more specifically, the top surface of the ridge and the plate are joined and fixed. You can also.

  Moreover, although the above-mentioned Example demonstrated the application example as a heat exchanger, it can also be set as the plate laminated body used for uses other than a heat exchanger.

It is a perspective view which shows schematic structure of the heat exchanger 100 as an Example of this invention. It is explanatory drawing for disassembling and explaining this heat exchanger 100. FIG. FIG. 4 is a process diagram illustrating a manufacturing process of the heat exchanger 100. It is explanatory drawing which shows the mode of plate lamination | stacking in a heat exchanger manufacturing process. It is explanatory drawing which shows the mode of the plate press in a heat exchanger manufacturing process. It is explanatory drawing which shows the heat exchanger 100 which passed through the heat exchanger manufacturing process by end view. It is explanatory drawing for disassembling and explaining schematic structure of 100 A of heat exchangers of another Example. FIG. 6 is a diagram corresponding to FIG. 5, and an explanatory view showing a state of plate pressing in a heat exchanger manufacturing process in another embodiment. It is explanatory drawing which shows the mode of the conventional plate press.

Explanation of symbols

100, 100A ... heat exchanger 110 ... plate unit 112 ... uppermost layer plate 113 ... groove 114 ... ridge 115 ... lowermost layer plate 116 ... intermediate layer 117 ... groove 118 ... ridge 130, 130A ... side plate 132, 132A ... concave shape Wall surface 133: Planar wall portion 140, 140A ... Side plate 142, 142A ... Concave wall surface 143 ... Planar wall portion 150 ... Channel

Claims (4)

A method of manufacturing a plate laminate comprising a plurality of plates having grooves and a flow path formed by overlapping plates and the grooves,
A laminating step of laminating a plurality of the plates;
An arrangement step of arranging a side wall so that an end portion of the laminated plate is placed in a lamination direction across a plurality of plates;
A press bonding step of pressing the stacked plates in the stacking direction and bonding overlapping plates;
The side wall, after the said lamination already plate a curved surface the surface of the opposing side and curved in a concave shape, a該湾curved, increasing the degree of concave as the central region of the plate laminating direction of the laminated pre plate A method for producing a plate laminate, comprising: It is a manufacturing method of the plate laminated body according to claim 1,
The degree of the concave of the concave curved surface of the side wall is determined when each plate included in the stacked plate is deformed so as to extend toward the concave curved surface under a pressing force along the stacking direction. A method for manufacturing a plate laminate is defined in accordance with the magnitude of the reaction force derived toward the concave curved surface. It is a manufacturing method of the plate laminated body according to claim 1 or 2 ,
The concave curved surface is flat in a predetermined range facing the one end side plate and the other end side plate in the stacking direction of the stacked plates. A plate laminate in which a plurality of plates are laminated,
A plurality of the plates having grooves are stacked and bonded and fixed, and the grooves are closed between the bonded plates to form a flow path,
A side wall that surrounds the stacked plate along a plate stacking direction and faces a side surface of the stacked plate;
The side surface of the laminated plate is curved outward so that the degree of convexity increases toward the center region in the plate lamination direction of the laminated plate,
The side wall includes a concave curved surface that matches the curvature of the side surface of the laminated plate that is curved outward, and the concave laminated surface is in close contact with the side surface of the laminated plate body.

Images