Heat exchanger

Abstract

To provide a heat exchanger capable of improving rigidity of a case.SOLUTION: A heat exchanger 1 includes a stacked body 2 in which a flow passage for first fluid and a flow passage for second fluid are alternately formed by stacking a plurality of plates 21-24, a bottomed cylindrical and rectangular parallelepiped case 3 which stores the stacked body 2 and is opened on one side of a Z direction (stacking direction), and a base plate 4 which is provided on the opening side of the case 3. On a short-side side wall 322 as a plane of a side wall 32 extending along the Z direction, the case 3 has an inflow port 33 and an outflow port 34 through which the first fluid passes, and a step 322A formed in the vicinity of the inflow port 33 or the outflow port 34.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a heat exchanger. [Background technology]

[0002] Conventionally, oil coolers attached to the cylinder block of an internal combustion engine have been used in a number of applications. A heat exchanger in which a core on which sheets are stacked is housed in a casing has been proposed (for example, In the heat exchanger described in Patent Document 1, the outer wall of the cylindrical casing An inlet and outlet for cooling water are formed on the side of the cooling water supply pipe, and an inlet pipe and an outlet pipe are connected to the inlet and outlet. It is being done. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-127819 Summary of the Invention [Problem to be solved by the invention]

[0004] When a heat exchanger is installed in a vehicle, the space for the heat exchanger must be determined taking into consideration its relationship with other parts. As described in Patent Document 1, the flow is set on the outer peripheral wall (i.e., the side wall) of the casing. By providing an entrance and exit for the body and connecting a pipe that extends perpendicular to the stacking direction of the plates, The height of the entire heat exchanger (the dimension in the stacking direction) becomes smaller and flatter. The casing may result in low space utilization efficiency, and for layout reasons, a rectangular There were cases where the use of a casing was desirable.

[0005] However, the pipe is formed by forming an inlet and outlet for the fluid in the side wall of the rectangular casing. If the flat side wall is connected to the In other words, when flattening the structure and improving the space utilization efficiency, In some cases, it was difficult to ensure the rigidity of the bearing.

[0006] The present invention has been made in view of the above-mentioned problems, and aims to improve the rigidity of the case. The object of the present invention is to provide a heat exchanger that can [Means for solving the problem]

[0007] In order to solve the above problems, the heat exchanger according to the present invention is configured by stacking a plurality of plates. a laminate in which flow paths for the first fluid and flow paths for the second fluid are alternately formed in the stacking direction; A bottomed, cylindrical, rectangular parallelepiped case is provided to accommodate the stack and is open on one side in the stacking direction. and a base plate provided on the opening side of the case, The side wall extending along the stacking direction has a flat portion provided with an inlet and an outlet through which the first fluid passes. an outlet, and a step portion formed around the inlet or outlet. Let's say.

[0008] According to this aspect, the step portion surrounds the inlet and the outlet on the flat surface portion, A rectangular parallelepiped case is used, and an inlet and outlet are provided on the side wall to make efficient use of space. Even if the efficiency is improved, the rigidity of the case can be improved. Or, a pipe is attached to the outlet by brazing, and an external force is applied from the outside in the direction of tilting the pipe. When the pipe is attached, stress can be prevented from concentrating at the base. In addition, when the diameter of the pipe is increased to reduce the flow resistance, The brazing joint area of ​​the pipe is increased, and the pipe joint strength is increased, so the pipe is less susceptible to external force. When the pipe is attached, a large deformation force acts on the flat surface of the pipe. Deformation of the flat mounting surface can be suppressed.

[0009] The step portion is a step in which the inner region thereof protrudes more toward the outside of the case than the outer region thereof. According to this aspect, at the position where the inlet and the outlet are formed, The internal space of the case is expanded. This allows the first fluid that flows into the case from the inlet to When the first fluid flows along the stacking direction, or when the first fluid flows from the stack toward the outlet, the first fluid flows along the stacking direction. This allows the flow path to be enlarged.

[0010] The side wall portion has an enlarged inner and outer dimension at the edge portion on the opening side of the case. The inner region and the expanded portion may extend along the same plane. According to the above, the expanded portion can improve the rigidity of the opening side of the case. The shape can be simplified compared to a configuration in which the step portion and the enlarged portion are located on different planes. Cut.

[0011] The case is formed in a rectangular shape when viewed from the stacking direction, and the inlet and the outlet The openings may be arranged adjacent to a pair of diagonal corners. According to the study, it is relatively easy to ensure rigidity at the positions of the flat surface adjacent to the corners. The inlet and outlet are formed at the position, so that the inlet and outlet form a This can prevent the reduction in rigidity of the case due to the increase in the temperature. [Effects of the Invention]

[0012] According to the heat exchanger of the present invention, the rigidity of the case can be improved. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view showing a heat exchanger according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing a laminate and a base plate of the heat exchanger according to the embodiment of the present invention. [Figure 3] 1 is a cross-sectional view taken through an outlet pipe of a heat exchanger according to an embodiment of the present invention. FIG. [Figure 4] 1 is a cross-sectional view taken through an inlet pipe of a heat exchanger according to an embodiment of the present invention. FIG. [Figure 5] FIG. 4 is an enlarged cross-sectional view showing a part of FIG. 3 in an enlarged scale. [Figure 6] 4 is an enlarged cross-sectional view showing another part of FIG. 3 in an enlarged scale. [Figure 7] FIG. 2 is a plan view of the bottom plate of a stack of heat exchangers according to an embodiment of the present invention. [Figure 8] FIG. 2 is a plan view showing a first plate of a stack of the heat exchanger according to the embodiment of the present invention. [Figure 9] FIG. 3 is a plan view showing a second plate of the stack of the heat exchanger according to the embodiment of the present invention. [Figure 10] FIG. 4 is a cross-sectional view taken along a line passing through a second distribution channel of the heat exchanger according to the embodiment of the present invention. [Figure 11] 1 is a side view showing a heat exchanger according to an embodiment of the present invention. [Figure 12] FIG. 2 is a side view of a stack and a base plate of a heat exchanger according to an embodiment of the present invention. [Figure 13] FIG. 10 is a side view of a laminate and a base plate of a heat exchanger according to a modified example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, the heat exchanger 1 is formed by stacking a plurality of plates 21 to 24. A flow path for a first fluid (coolant in this embodiment) and a flow path for a second fluid (oil in this embodiment) The stack 2 has a plurality of paths and a plurality of paths alternately formed in the Z direction (stacking direction), and a storage unit for storing the stack 2. A cylindrical case 3 with a bottom and an opening on one side in the Z direction, and a base provided on the opening side of the case 3 The case 3 has a side wall portion 32 extending along the Z direction, and a plate 4. The first fluid is The outer periphery 20 of the stack 2 is formed on the side wall of the case 3. The inlet 33 is formed along the inner surface of the inlet 32 ​​and the inlet 33 is formed along the inner surface of the inlet 32. The side wall portion 32 has a recess 26 at a portion facing the outlet 34, the recess 26 being spaced apart from the inner surface of the side wall portion 32. As a result, the first fluid flows along the Z direction between the outer periphery 20 of the laminate 2 and the inner surface of the side wall portion 32. A first distribution flow path 28 is formed through which the liquid flows.

[0015] As shown in FIG. 6, the first plate 21 and the second plate 22 are spaced apart from the outer periphery by a distance Z. The outer peripheral flanges 214 and 224 protrude in the direction of the arrows. , 224 are arranged relative to the outer peripheral flange portions 214, 224 of the other plates adjacent to the protruding side, The first plates 21 are positioned on the outside and are brazed together by tapered fitting. Between the first plate 22 and the second plate 22, an inlet 33 or an outlet 34 is provided, as shown in FIGS. An opening 29 is provided at a position opposite to the opening 29, which opens the gap between the plates and serves as a flow path for the first fluid (cooling water). B, and a blocking portion 29A that blocks the space between the plates that becomes a flow path for the second fluid (oil). It has been done.

[0016] The case 3 has a rectangular parallelepiped shape, and the short side wall portions 32 are flat portions of the side wall portions 32. 2, an inlet 33 and an outlet 34 through which the first fluid passes, and and a step portion 322A formed around the periphery (see FIG. 11).

[0017] 1 is a perspective view showing a heat exchanger 1 according to an embodiment of the present invention, and FIG. FIG. 3 is a perspective view showing the laminate 2 and the base plate 4 of the heat exchanger 1. 4 is a cross-sectional view through the inlet pipe 5 of the heat exchanger 1. 5 is an enlarged cross-sectional view showing a part of FIG. 3 , and FIG. 6 is another cross-sectional view showing another part of FIG. 3 . 7 is an enlarged cross-sectional view showing a part of the stack 2. 8 is a plan view showing the first plate 21 of the laminate 2, and FIG. 9 is a plan view showing the first plate 21 of the laminate 2. 10 is a plan view showing the second plate 22 of the heat exchanger 1. In this embodiment, where the fluid is cooling water and the second fluid is oil, the water channels are formed alternately. A cross section passing through a flow path 27 that connects the oil flow paths in the lamination direction of the core among the oil flow paths that are formed 11 is a side view showing the heat exchanger 1, and FIG. 12 is a view showing the laminate 2 and the base FIG.

[0018] The heat exchanger 1 is used by being incorporated into the cooling water system of an automobile (vehicle), for example. The automobile in which the device 1 is installed may have only an internal combustion engine as a driving source, It may have an internal combustion engine and a motor, or it may have only a motor. A heat exchanger 1 is often provided to cool the heat generating parts in each driving method. An example of the fluid to be cooled is cooling water, and an example of the fluid to be cooled is oil such as hydraulic oil. However, these fluids vary depending on the vehicle's drive system, the type of heat-generating part, and the required cooling performance. In this embodiment, the fluid used for cooling is the first The fluid to be cooled is the first fluid, and the fluid to be cooled is the second fluid. In the following description, the first fluid is assumed to be a cooling fluid. The first fluid is water, and the second fluid is oil.

[0019] The heat exchanger 1 is provided with a flat rectangular parallelepiped case 3, as will be described later. The thickness direction (the direction in which the case 3 has an opening as will be described later) is defined as the Z direction, and the In the XY plane, the long side direction of the case 3 is the X direction, and the short side direction is the Y direction. In the following description, the side where the case 3 is open in the Z direction (where the base plate 4 is provided) is referred to as the side where the case 3 is open in the Z direction. The side where the wire is inserted (the lower side in Figures 1 to 4) is the lower side, and the opposite side (the upper side in Figures 1 to 4) is the ) is the upper side, and these are sometimes simply called the top and bottom, but the top and bottom in the Z direction are just for convenience. Therefore, it does not have to coincide with the top and bottom in the vertical direction in actual use.

[0020] The heat exchanger 1 includes a laminate 2, a case 3, a base plate 4, an inlet pipe 5, and The heat exchanger 1 further includes an outlet pipe 6. The heat exchanger 1 passes through the intersection of diagonal lines L1 and L2, which will be described later. It has two-fold rotational symmetry about the rotation axis extending in the Z direction, and The heat exchanger 1 is rotated 180° around the rotation axis. When the image is rotated by 10 degrees, the shape before the rotation and the shape after the rotation will match.

[0021] As shown in FIGS. 5 and 6, the laminate 2 is made up of a first plate 21 and a second plate 22. The first fluid flow path (coolant flow path) and the second fluid flow path are formed by alternately stacking the first and second layers. (oil flow path) are alternately configured in the Z direction, and the bottom plate 23 and the top The laminate 2 further includes a main plate 24. The plates 21 to 24 are arranged along the XY plane. The film extends (the direction along the XY plane is the in-plane direction) and is stacked in the Z direction. When the laminate 2 is viewed from the Z direction, the laminate 2 is formed in a rectangular parallelepiped shape. The diagonals are the first diagonal L1 and the second diagonal L2, and the lines connected by the first diagonal L1 are A pair of corners is defined as first corners 2A, and a pair of corners connected by a second diagonal line L2 is defined as second corners. 2B (see Figures 1, 7, 8, and 9).

[0022] In the stack 2, the third plate 23 is located on the bottom plate 23 (i.e., opposite the base plate 4). The second plate 22 is then stacked on top of the first plate 21. 4 is placed on the second plate 22 and has the same shape as the first plate 21 unless otherwise specified. A fin plate is provided on the upper side of the second plate 22 and on the lower side of the first plate 21. A port 25 is provided, forming a flow path for the second fluid. A flow path for the first fluid is formed between the upper side of the first plate 21 and the lower side of the second plate 22. Each plate constituting the laminate 2 is made of, for example, an aluminum clad material. It is possible.

[0023] As shown in FIG. 7, the bottom plate 23 is different from the other plates in that it has a The bottom plate 23 has no recess and is formed in a rectangular plate shape. B, a plurality of protrusions 232 formed on the upper surface, and a and an outer peripheral flange portion 233 protruding upward.

[0024] As shown in FIG. 8, the first plate 21 has a recess 211 formed in the first corner portion 2A, The through-holes 212 formed in the second corner portions 2B and the plurality of protrusions 2 formed on the upper surface and protruding upward are 13, an outer peripheral flange portion 214 protruding upward in the Z direction from the outer peripheral edge, and and a first closing portion 215 (see FIG. 5) extending downward from the first plate 21. The rectangular plate-shaped portion has its corners cut off, forming a recess 211. are.

[0025] As shown in FIG. 9, the second plate 22 has a recess 221 formed in the first corner portion 2A, The through-holes 222 formed in the second corner portions 2B and the plurality of protrusions 2 formed on the lower surface and protruding downward are 23, an outer peripheral flange portion 224 protruding upward in the Z direction from the outer peripheral edge, and and a second closing portion 225 (see FIG. 5) extending upward from the second plate 22. The rectangular plate-shaped portion has its corners cut off, forming a recess 221. are.

[0026] As can be seen from FIG. 2, the top plate 24 is similar to the first plate 21 (see FIG. 8). , a recess 241, a plurality of protrusions 243, and an outer peripheral flange 244, The first plate 2 has a cut-out shape, but the through-hole is not formed. Different from 1.

[0027] The outer peripheral flange portions 214, 224, 233, and 244 are recesses in the outer peripheral edges of the plates. 6. As shown in the figure, the outer flange is located at the top of the protruding side. The tapered section is inclined in the Z direction so that the area enclosed by the This allows the outer flange of the lower plate to contact the outer periphery of the adjacent upper plate. The outer flanges adjacent to each other in the Z direction are positioned on the outside of the outer flanges. For example, the outer flange portion 2 of the first plate 21 is 14 is located outside the outer peripheral flange portion 224 of the second plate 22 adjacent to it on the upper side, and The outer peripheral flange portion 224 of the plate 22 is located above the outer peripheral flange portion of the adjacent first plate 21. Located outside 214.

[0028] In this way, the outer flanges are brazed together with a tapered fit, and multiple plates are The plates are assembled together to form a rectangular parallelepiped laminate 2 as a whole, as shown in FIG. The laminate 2 may be assembled by stacking plates inside the case 3, or may be assembled outside the case 3. After being found, it may be housed in the case 3.

[0029] As shown in Figs. 2 and 10, among the outer peripheral flange portions 214, 224, 233, and 244, X The portions extending along the first flow direction are the fluid guide walls 210, 220, 230, and 240. The first and second fluids flow along the diagonal lines L1 and L2, as will be described later, and the second fluid flows in the X direction, which is the long side direction. The fluid guide walls 210, 220, 230, and 240 extending along the direction of the first fluid and the second fluid The outer flanges 214, 224 have a relatively small inclination angle with respect to the direction of fluid flow. , 233, 244 are joined together, As a result, the first fluid and the second fluid are guided through the fluid guide walls 210 and 220. , 230, 240, and can flow along the inner surfaces of the case 3 from both sides in the Y direction. It is designed to prevent fluid from leaking out.

[0030] In the assembled laminate 2, the recesses 211, 221, and 241 overlap each other, thereby forming a stack. A recess is formed in the outer peripheral portion 20 of the layer 2 near the first corner portion 2A with respect to the center of the side wall portion in the Y direction. 26 is formed. The through holes 212, 222, and 231 overlap with each other, so that the second fluid A second distribution flow path 27 is formed that allows passage along the Z direction.

[0031] The first plate 21 has a flange portion extending upward from the periphery of the through hole 212. The second plate 22 has a flange extending downward from the periphery of the through hole 222. These flanges are joined together (see Figure 6). The space between the upper side of the first plate 21 and the lower side of the second plate 22 is a second distribution channel 27. The second fluid passing through the second distribution flow path 27 does not flow into this space. On the other hand, the space between the lower side of the first plate 21 and the upper side of the second plate 22 is It communicates with the two distribution flow paths 27 .

[0032] The laminate 2 has outer peripheral flange portions 214, 224, 233, and 244 formed thereon. Therefore, in areas other than the recess 26, the space between the plates and the external space (the space inside the case 3) are In the recess 26, the first closing portion 215 and the second closing portion 225 are joined together. The blocking portion 29A is formed by the blocking portion 29A, and the lower side of the first plate 21 and the second plate 22 The space between the upper side of the first plate 21 and the upper side of the second plate 22 is partitioned from the outside space. An open space 29B is formed between the bottom of the upper surface of the upper surface of the upper surface of the lower ... The closing portion 29A has through holes 212, 222 and outer peripheral flange portions 214, 224. Between them, it is formed extending in the Y direction up to the position of the long side of the plate (Figs. 2, 8, 9 reference).

[0033] The case 3 has a bottom plate portion 31 and a cylindrical side wall portion 32 that is continuous with the outer periphery of the bottom plate portion 31. The casing is formed in a cylindrical shape with a bottom, and is rectangular when viewed from the Z direction.

[0034] The bottom plate portion 31 is formed in a rectangular plate shape along the XY plane, and the first diagonal line L1 and The corners are connected by the second diagonal line L2. In case 3, the corners are connected by the first diagonal line L1. A pair of corners connected by the second diagonal line L2 is referred to as first corners 3A, and a pair of corners connected by the second diagonal line L2 is referred to as second corners 3B. This is called corner 3B.

[0035] The side wall portion 32 has a pair of long side wall portions 321 corresponding to the long sides of the bottom plate portion 31 and a pair of short side wall portions 322 corresponding to the short sides. a pair of short-side side walls 322, and a pair of short-side side walls 321 and 322, which are positioned between the long-side side walls 321 and 322; The curved surface 323 has a total of four curved surface portions 323 that are placed on the surface.

[0036] Each of the pair of short side wall portions 322 has an inlet 33 through which the first fluid passes and an outlet 34 through which the second fluid passes. The inlet 33 and the outlet 34 are formed on the short side wall portion 322. , is formed in the center in the Z direction, and is closer to the first corner 3 than the center in the Y direction. That is, the inlet 33 and the outlet 34 are formed near A. When viewed from the side, the pair of first corners 3A of the pair of short sides of the rectangle are adjacent to each other. are placed in a suitable position.

[0037] The side wall portion 32 has a pair of short side wall portions 322, which are flat portions, each of which has a groove 322a. As shown in the figure, a step portion 322A is formed around the inlet 33 or the outlet 34. Specifically, the step portion 322A is, when viewed from the X direction, such that the inlet 33 or the outlet 34 is in the Y direction. The two straight lines are formed in the sandwiching position along the Z direction. The line segment that virtually connects the upper ends of the two straight lines and the line segment that virtually connects the lower ends of the two straight lines are used to create the line segment. The rectangular area surrounded by the inlet 33 or the outlet 34 is the inner area 322. The area of ​​the short-side side wall portion 322 that sandwiches the inner area 322B from the Y direction is the outer area This becomes area 322C.

[0038] The step portion 322A has an inner region 322B that protrudes further outward from the case 3 than the outer region 322C. The short-side side wall portion 322 has a step in the direction of the inner region 322B and an outer region 32 2C, the thickness is constant, that is, the inner and outer dimensions of the case 3 are has been expanded.

[0039] The side wall portion 32 is provided at the lower edge portion on the opening side of the case 3, and has an expanded inner and outer dimension. The bottom plate 23 has a large portion 324. The bottom plate 23 has a larger outer dimension than the other plates. An enlarged portion 324 is provided for the attachment of the plate 23. The enlargement amount of the enlarged portion 324 ( The difference in height between the inner and outer surfaces of the step portion 322A is equal to the difference in height between the inner and outer surfaces of the step portion 322A. The region 322B and the enlarged portion 324 are smoothly connected, and the inner region 322B and the enlarged portion 324 are 24 extend along the same plane.

[0040] The base plate 4 is formed in a flat plate shape and is provided so as to close the opening of the case 3. The base plate 4 has a pair of through holes 41 for the passage of the second fluid and a hole for attachment to other equipment. The laminate 2 is housed in the case 3, and a plurality of mounting holes for mounting the laminate 2 are formed in the case 3. When the base plate 4 is attached to the In this embodiment, the through-hole 41 is directly connected to a flow path of the second fluid in another device. However, by attaching a pipe or the like to the base plate 4, the fluid It may be introduced and derived.

[0041] The inlet pipe 5 and the outlet pipe 6 are cylindrical members through which the first fluid passes. The inlet pipe 5 and the outlet pipe 34 are connected by brazing in a liquid-tight manner. The outer diameter of type 6 is approximately the same as the inner diameter of the inlet 33 and the outlet 34. In order to reduce the fluid resistance, the inner diameters of the inlet pipe 5 and the outlet pipe 6 are relatively large. The inlet pipe 5 and the outlet pipe 6 are protruding into the case 3 (approximately φ15 mm). It is preferable that the amount is small, but there is no particular limitation on the detailed structure or the structure for connection. stomach.

[0042] In the heat exchanger 1 as described above, for example, the laminated body 2 is heated in a state where it is housed in the case 3. As a result, the brazing material provided on the surface of each part of the laminate 2 melts and cools, and the brazing material Specifically, the outer flanges of adjacent plates are joined together. The bottom or top surface of the plate is joined to the tip of the protrusion of the plate. Similarly, the inner surface (lower surface) of the bottom plate portion 31 of the case 3 and the top plate 24 are are joined.

[0043] Here, the relationship between each part of the case 3 and the stacked body 2 and the flow of fluid will be described. The outer dimensions of the rectangular parallelepiped laminate 2 are approximately equal to or slightly greater than the inner dimensions of the cylindrical side wall portion 32. That is, the laminate 2 has a periphery 20 that is smaller than the side wall 32 except for the recess 26. The inlet 33 and the outlet 34 are provided near the first corner 3A. Since the recess 26 is provided in the vicinity of the first corner portion 2A, the recess 26 faces the inlet 33. and a portion facing the outlet 34.

[0044] In this way, the recess 26 is formed between the case 3 and the laminate 2, and the outer peripheral portion 20 and the side wall portion A gap is formed between the inner surface of the nozzle 32 and the first distribution flow path 28. As shown in FIG. 1, an opening 29B is formed between the upper side of the first plate 21 and the lower side of the second plate 22. Therefore, the first distribution flow path 28, the upper side of the first plate 21, and the second plate 2 2 and the space between them.

[0045] The first fluid is introduced into the case 3 through an inlet pipe 5 and discharged through an outlet pipe 6 . The first fluid introduced into the inlet 33 by the inlet pipe 5 reaches the first distribution channel 28. In the first distribution flow path 28, the first fluid can flow along the Z direction, and It can flow into the space between the upper side of the first plate 21 and the lower side of the second plate 22. That is, the first fluid is distributed in the Z direction and flows between the upper side of the first plate 21 and the upper side of the second plate 22. 22 and flows into each of the spaces between them.

[0046] In the laminate 2, the first fluid flows from one of the pair of first corner portions 2A to the other. , and reaches the first distribution flow path 28 on the outlet 34 side. The first flow that flows into the first distribution flow path 28 on the outlet 34 side from each of the spaces between the lower side of the first distribution flow path 28 and the lower side of the second distribution flow path 22. The fluid flows along the Z direction toward the outlet 34. That is, the distributed first fluid is recirculated. The first fluid is then led out of the outlet 34 by the outlet pipe 6.

[0047] The second fluid flows through one of the pair of through holes 41 as an inlet and the other as an outlet. The gas flows into the second distribution channel 27 from one of the pair of through holes 41. The second fluid can flow along the Z direction and is connected to the underside of the first plate 21 and the second plate 22. In other words, the second fluid can flow into the space between the upper side of the port 22 and the upper side of the port 22 in the Z direction. Each of the spaces between the lower side of the first plate 21 and the upper side of the second plate 22 flows into.

[0048] In the laminate 2, the second fluid flows from one of the pair of second corner portions 2B to the other. , and reaches the other second distribution channel 27. The second fluid that flows into the other second distribution flow path 27 from each of the spaces between the other side is The second fluid flows in the Z direction toward the hole 41. That is, the distributed second fluid is collected again. Thereafter, the second fluid is discharged to the outside from the other through-hole 41.

[0049] When the first and second fluids flow as described above, the flow directions in the X direction are different from each other. That is, the second fluid flows through the through-hole 41 in the X direction. It is preferable that the air is introduced into the case 3 from the through-hole 41 that is closer to the outlet 34 . Depending on the type of fluid, flow rate, and other conditions, the first and second fluids may be in the same direction in the X direction. It may be made to flow to.

[0050] Next, the structure of the portion of the laminate 2 facing the inlet 33 or the outlet 34 will be described in detail. The first blocking portion 215 is formed over the entire recess 211 and is located on the side opposite to the protruding side. A first wall-shaped portion 215A extends downward from the tip of the first wall-shaped portion 215A. a first joint 215B extending along the XY plane toward the inlet 33 or the outlet 34; The second closing portion 225 is formed over the entire recess 221 and has a A second wall portion 225A extends from the tip of the second wall portion 225A to the inlet 33 or a second joint 225B extending along the XY plane toward the outlet 34; and a second joint 225 and a cover portion 225C continuous with the tip of B.

[0051] The first and second joining portions 215B and 225B are joined together in a stacked manner. The first joint portion 225C extends upward and is located at the end of the first joint portion 215B. The first and second joints 215B and 215C are connected to each other and cover the end of the inlet 33 or outlet 34. The joint portion between first joint portion 215B and second joint portion 225B is covered by cover portion 225C. and the second joint portion 225B are joined by brazing, and the joint is , 222 and the outer peripheral flange portions 214, 224, Y The outer peripheral flanges 214 and 224 are provided so as to extend in the direction of the short side of the plate. The through holes 212 and 222 are also formed at positions opposite to the through holes 212 and 222. , 222, the plates 21, 22 are only provided with the outer peripheral flange portions 214, 224. In addition, the first and second joining portions 215B and 225B are also brazed. This improves the liquid-tightness of the plate joints near the long sides of plates 21 and 22. Cover The portion 225C is formed only at a position along the recessed portions 211 and 221 (see FIGS. 2, 8, and 9). The outer peripheral flange portions 214, 224 are also formed through the through holes 212, 22 on the short side of the plate. The reason why the flow of the first fluid is concentrated in the vicinity of the first distribution path 28 is that the flow of the first fluid is concentrated in the vicinity of the first distribution path 28. This is because.

[0052] As described above, according to the heat exchanger 1 according to the embodiment of the present invention, the flow of the outer periphery of the stack 2 is A recess 26 is formed in a portion facing the inlet 33 and a portion facing the outlet 34. The first distribution flow path 28 is formed by the portion 26, and the case 3 is made larger than the stacked body 2. In this case, by forming the recess 26, the XY plane through which the first fluid passes is The distance between the electrodes is shorter, so the laminate 2 needs to be made slightly larger to compensate for this. The recess 26 is formed locally, and the outer periphery of the laminate 2 is in contact with the side wall 3 of the case 3. 2, it is possible to prevent the laminate 2 from becoming large in size. While ensuring the fluid distribution performance by the first distribution flow path 28 formed by the recess 26, The entire heat exchanger 1 can be made smaller.

[0053] The inlet 33 and the outlet 34 are adjacent to a pair of first corners 3A, which are diagonally opposite each other. Since the first fluid is arranged at a position where the first and second fluids overlap each other in the stack 2, the first fluid flows along the first diagonal line L1. The distance in the XY plane through which the first fluid passes can be increased, and the stack 2 can be made compact. As a result, the heat exchanger 1 as a whole can be easily downsized.

[0054] In addition, each of the plates 21, 22, and 24 of the laminated body 2 has a rectangular shape with the corners cut off. Therefore, the recesses 26 can be easily formed, and the shape of the laminate 2 is prevented from becoming complicated. It is possible.

[0055] Furthermore, since the through holes 212, 222, and 231 are formed in the second corner portion 2B, The distribution channels 27 are formed at the pair of corners 2B, and the second fluid after distribution flows along the second diagonal line L2. This allows the distance in the XY plane that the second fluid passes through to be increased. This makes it easier to reduce the size of the laminate 2, and as a result, makes it easier to reduce the size of the entire heat exchanger 1.

[0056] Furthermore, the first corner portion 2A in which the recess 26 is formed and the through holes 212, 222, and 231 are formed The second corner portion 2B is different from the first distribution flow path 28, that is, the second distribution flow path 27 is different from the first distribution flow path 28. By providing the electrodes at different corners, the laminate 2 can be used efficiently in space. This allows the heat exchanger 1 as a whole to be made smaller.

[0057] In addition, since the case 3 has an inlet 33 and an outlet 34 in the side wall portion 32, The body moves along the XY plane when it flows into the case 3 and when it passes between the plates. The first plate 21 and the second plate 22 are connected to each other, so that the pressure loss can be reduced. The plate 22 is formed with outer peripheral flange portions 214, 224, and the plates adjacent in the Z direction The outer peripheral flange portions 214, 224 are tapered and brazed together, The plates can be positioned relative to each other in the XY plane, and the plates are stacked in a predetermined order. This can improve workability.

[0058] Furthermore, the outer peripheral flanges 214 and 224 have the fluid guide walls 210 and 220. Therefore, the fluid flow path can be defined by the outer peripheral flange portions 214, 224. There is no need to define the flow path using the case 3 or other members, simplifying the structure of the heat exchanger 1. It is possible.

[0059] In addition, the outer peripheral flange portions 214 and 224 of the first plate 21 and the second plate 22 The outer circumferential edge is provided over the entire area except for the position facing the first distribution flow path 28. This allows the fluid to flow more efficiently through the flow path between the inlet 33 and the outlet 34.

[0060] In addition, the first joint 215B of the first closing part 215 and the second joint 225 of the second closing part 225 By overlapping and joining the two, it is easy to secure the joining area, and the closing portion 29A This can suppress fluid leakage.

[0061] The second closing portion 225 has a cover portion 225C that covers the tip of the first joint portion 215B. This allows the fluid flowing in from the inlet 33 to flow directly to the tip of the first joint portion 215B. As a result, the bonding portion between the first bonding portion 215B and the second bonding portion 225B is This reduces the fluid pressure applied to the joint, preventing chemical changes at the joint and deformation due to pressure. Or, damage can be suppressed.

[0062] Further, the step portion 322A of the short side wall portion 322, which is a flat portion, is provided between the inlet 33 and the inlet By surrounding the outlet 34, the rectangular parallelepiped case 3 is used and the inflow to the side wall portion 32 Even if the opening 33 and the outlet 34 are provided to improve the space utilization efficiency, the rigidity of the case 3 In addition, the pipes 5 and 6 are brazed to the inlet 33 or outlet 34. Since the pipes are attached by a bolt, an external force acts from the outside in a direction that tilts the pipes 5 and 6. In this case, stress concentration at the base where the pipes 5 and 6 are attached is avoided. In addition, if the diameter of pipes 5 and 6 is increased to reduce the flow resistance, In this case, the brazing joint area of ​​the pipes 5 and 6 is increased, and the joint strength of the pipes 5 and 6 is increased. Therefore, when an external force acts on the pipes 5 and 6, a large deformation force acts on the short side wall portions 322. However, the step portion 322A can suppress deformation of the short-side side wall portion 322.

[0063] Further, the step portion 322A is such that the inner region 322B is closer to the outside of the case 3 than the outer region 322C. By having a step protruding in the direction of the inlet 33 and the outlet 34, In this way, the internal space of the case 3 is expanded. This expands the first distribution flow path 28. It is possible.

[0064] In addition, the expansion portion 324 is formed in the case 3, thereby improving the rigidity of the opening side of the case 3. Furthermore, the inner region 322B and the enlarged portion 324 are aligned along the same plane. By extending the width, the shape can be simplified compared to a configuration in which the step portion and the expanded portion are located on different planes. It can be made into

[0065] In addition, among the flat short-side side wall portions 322, the first corner portion 323 is relatively easy to secure rigidity. The inlet 33 and the outlet 34 are formed at positions adjacent to A. In addition, a decrease in the rigidity of the case 3 due to the formation of the outlet 34 can be suppressed.

[0066] The present invention is not limited to the above-described embodiment, and includes other configurations that can achieve the object of the present invention. For example, in the above-described embodiment of the present invention, the following modifications are also included in the present invention. The first corner portion 2A in which the recess 26 is formed and the second corner portion 2B in which the through holes 212, 222, and 231 are formed are The first distribution flow path, the through-hole, and the second corner portion 2B are located on different diagonal lines. The positional relationship between the first corner portion 2A and the second distribution flow path is not limited to this. The two corners 2B are not the ends of the diagonal lines L1 and L2, but are parallel to the long sides of the plates 21 and 22. The recesses 26 and 27 are formed at both ends of the portion so that the first fluid and the second fluid flow parallel to each other. It is also possible to design the through holes 212, 222, 231.

[0067] In the above-described embodiment of the present invention, the plates 21, 22, and 24 of the laminated body 2 are rectangular. The corners of the shape are cut off, so that the recess 26 is formed. The recess may be formed in another shape, such as by cutting out one side of a rectangle without cutting off the corners. That is, the "recess" refers to a predetermined shape (e.g., It is sufficient if the recess is based on a standard shape (for example, a rectangular shape in a plan view, a circular shape in a plan view, etc.).

[0068] In the above-described embodiment of the present invention, the inlet 33 and the outlet 34 are arranged diagonally. The first distribution flow paths are arranged adjacent to the first corner portions 3A. The recesses to be formed and the inlets and outlets are limited to those located near the corners. For example, the inlet and the outlet may be provided at the center of the side. The outlet and case are designed according to the relative positions of the heat exchanger and other equipment, and the routing of piping. For example, the inlet and outlet may be set at an appropriate position. One of them is provided on the long side wall 321 or the base plate 4 side, not on the short side wall 322. The inlet and outlet may be arranged in a layout other than diagonally. In addition, for example, at the upstream and downstream positions of the parallel lines of the fluid guide walls 210 and 220, It may be provided.

[0069] In the above-described embodiment of the present invention, the laminate 2 and the case 3 are rectangular parallelepiped-shaped, and the Z direction Although the laminate and the case are rectangular when viewed from the front, they have shapes corresponding to each other. It is sufficient that the outer shape is cylindrical, and other shapes are also acceptable.

[0070] In the above-described embodiment of the present invention, the first plate 21 simply opens the opening 29B. However, the first plate may be shaped so as to partially cover the opening. For example, as shown in a modified example in FIG. 13, the first plate 21 has an outer peripheral flange portion 214. 13, the extension 216 may be a continuous extension 216. is formed in the recess 211 and extends from the main body of the first plate 21 (the plate-shaped portion along the XY plane). The protruding dimension is the distance between the first plate 21 and the second plate 22. is smaller than the interval.

[0071] In this modified example, the extensions 216 are formed on all of the plurality of first plates 21. The long portion 216 is formed in a range of about half of the entire recess 211. Alternatively, the recess 211 may be formed over the entirety thereof.

[0072] The extension portion 216 is provided so as to cover the open portion 29B from the side of the inlet 33 or the outlet 34. As a result, the opening area of ​​the opening 29B when viewed from the X direction is reduced. The original opening area of ​​29B is determined by the distance between the first plate 21 and the second plate 22 and the area of ​​the first plate 23. The Y-direction dimensions of the first plate 21 and the second plate 22 are determined by the product of The effective opening area is reduced by the area (projected area) of the extension 216 .

[0073] If an extension 216 is provided to reduce the opening area of ​​the open portion 29B, the flow in the flow path for the first fluid can be reduced. The flow rate of the first fluid flowing into the case 3 from the inlet 33 can be restricted. When the first fluid is distributed in the Z direction, the flow rate increases as the position becomes closer to the inlet 33 in the Z direction. The flow rate tends to decrease as the distance from the inlet 33 increases. By restricting the flow rate at the center in the Z direction, the flow rate can be reduced even at positions far from the inlet 33. This makes it easier to ensure the required amount, and the difference in flow rate between positions in the Z direction can be reduced.

[0074] In the modified example shown in FIG. 13, all the first plates 21 have the same extensions 216. However, the projected areas of the extensions of the first plates may be different from each other. Only the first plate of the inlet may have an extension. The first opening 29B is positioned closer to the inlet 33 so that the opening area of ​​the opening 29B becomes smaller as the opening area becomes closer to the inlet 33. The projected area (particularly the height) of the extension of the plate may be increased, or the first part close to the inlet 33 may be increased. The extension may be provided only on the plate. Also, if the diameter of the inlet is large enough for the height of the stack, When the flow rate difference is small due to the pressure or viscosity of the fluid, etc., The part may be omitted.

[0075] In addition, when an extension portion is provided, the outer peripheral flange portion of the first plate and the second plate is The extension portion may be provided on the plate whose protruding side coincides with the side on which the opening is provided.

[0076] In the above-described embodiment of the present invention, the fluid guide walls 2 of the outer peripheral flange portions 214 and 224 10, 220 defines the fluid flow path, but the laminate is not a case or its For example, the first plate and the second plate may define a fluid flow path together with other members. The outer peripheral flange portion is not provided in a part of the outer peripheral edge of the case. The inner surface of the base or other member may form a fluid flow path.

[0077] In the above embodiment of the present invention, the second blocking portion 225 is disposed at the tip of the first joining portion 215B. However, a cover part is also provided on the first closing part 215 side. Also, depending on the plate material, joining method, type of fluid, fluid pressure, etc., In some cases, chemical alteration of the joints, deformation or damage due to pressure, etc., is unlikely to occur. In this case, the cover may be omitted.

[0078] In the above-described embodiment of the present invention, both the first blocking section 215 and the second blocking section 225 are joined by wall-like portions 215A, 225A and joining portions 215B, 225B. However, the shape of the blocking portion is not limited to this. For example, the first plate and the second plate Only one of the two may be provided with a blocking portion extending toward the other.

[0079] In the above-described embodiment of the present invention, the step portion 322A is formed such that the inner region 322B is formed such that the outer region 322C has a step that protrudes outward from the case 3. If the outward protrusion is likely to cause interference with other parts, the step portion should be It may have a step that protrudes inward.

[0080] In the above-described embodiment of the present invention, the inner region 322B and the enlarged portion 324 are in the same plane. However, the height of the step portion may be greater than the amount of expansion of the expansion portion. These dimensions may be small, and can be set appropriately depending on the rigidity and the relationship with other parts. The case may have an enlarged portion formed therein as required. For example, the case may have an enlarged portion formed therein at the bottom part. If the rate is relatively small, the enlarged portion may not be formed.

[0081] In the above-described embodiment of the present invention, the inlet 33 and the Although the outlet 34 is formed, the positions of the inlet and outlet may be, for example, on the short side. It may be the center of the side wall portion 322 in the Y direction, or may be appropriately determined depending on the routing of the pipe, etc. It should be set.

[0082] The embodiment of the present invention has been described above. The present invention is not limited to the heat exchanger according to the above embodiment. The present invention is not limited to the above, but encompasses all aspects within the scope of the present invention and claims. In addition, each configuration is appropriately selected so as to achieve at least part of the above-mentioned problems and effects. For example, the shapes, materials, and arrangements of the components in the above embodiments may be changed. The location, size, etc. may be changed as appropriate depending on the specific use of the present invention. [Explanation of symbols]

[0083] 1...heat exchanger, 2...laminated body, 20...periphery, 21...first plate, 212...through hole, 21 4, 224... outer peripheral flange portion, 215... first closing portion, 215A... first wall-shaped portion, 215B... First joint portion, 216...extension portion, 210, 220...fluid guide wall, 22...second plate, 2 22...Through hole, 225...Second closing part, 225A...Second wall-shaped part, 225B...Second joint part, 2 25C...cover portion, 26...recess, 27...second distribution flow path, 28...first distribution flow path, 29A...closed Closed part, 29B... Open part, 2A... First corner, 2B... Second corner, 3... Case, 32... Side wall part, 322... Short side wall portion (flat portion), 322A... Step portion, 322B... Inner region, 322C... Outer area, 324... Enlarged part, 33... Inlet, 34... Outlet, 3A... First corner, 3B... Second Corner, 4...Base plate

Claims

1. By stacking a plurality of plates, a flow path for the first fluid and a flow path for the second fluid are formed in the stacking direction. and a laminate formed by alternating A bottomed cylindrical rectangular parallelepiped container that accommodates the stack and is open on one side in the stacking direction. In the case of a base plate provided on the opening side of the case, The case has a side wall extending in the stacking direction, and a flat portion of the side wall through which the first fluid flows. an inlet and an outlet passing through the inlet and the outlet, and a step portion formed around the inlet or the outlet; A heat exchanger comprising:

2. The step portion is a step in which the inner region thereof protrudes more toward the outside of the case than the outer region thereof.

2. The heat exchanger according to claim 1, further comprising:

3. The side wall portion has an enlarged inner and outer dimension at the edge portion on the opening side of the case. having a department, 3. The method of claim 2, wherein the inner region and the enlarged portion extend along the same plane. Heat exchanger on board.

4. The case is formed in a rectangular shape when viewed from the stacking direction, and the inlet and the outlet The openings are arranged adjacent to each of a pair of diagonal corners. The heat exchanger according to any one of claims 1 to 3.

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