Structure to prevent incorrect assembly of heat exchangers

Abstract

To provide an erroneous assembling prevention structure of a dish-shaped cup-plate laminated type heat exchanger having rotational symmetry at a side wall.SOLUTION: In a heat exchanger which has a core 5 having a first component group 5a in which a first cup plate 1, first fins 3, a second cup plate 2 and second fins 4 are sequentially laminated on one another, and in which side walls 1d, 2d of the cup plates 1, 2 are superimposed on each other, a first protrusion 1a and a second protrusion 1b are formed at the first cup plate 1, a third protrusion 2a and a fourth protrusion 2b are formed at the second cup plate 2, a first avoidance hole 31a and a third avoidance hole 32a are formed at the first fins 3, and a second avoidance hole 41b and a fourth avoidance hole 42b are formed at the second fins 4. Then, in a combination and an orientation of kinds of prescribed cup plates, all the four protrusions are not superimposed on one another when viewing them from a lamination direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a structure for preventing misassembly of a heat exchanger in which a plurality of cup plates formed in a dish shape are stacked.

Background Art

[0002] As an example of a conventional stacked heat exchanger of cup plates used in an oil cooler or the like, one type of cup plate is placed every other one, and rotated 90 degrees or 180 degrees around the center of the cup plate and stacked, and every other one of the cup plates has a structure in which a first flow path through which a first fluid flows and a second flow path through which a second fluid flows are alternately formed. A first fin and a second fin are arranged in each cup of each cup plate. The second fin may have a similar shape or the same shape as the first fin.

Summary of the Invention

Problems to be Solved by the Invention

[0003] In the case of the above-described cup plate stacked heat exchanger, there is a possibility that misassembly may occur in which adjacent cup plates are stacked without being rotated 90 degrees or 180 degrees. In addition, when the first fin and the second fin are not the same and there are a plurality of fin types, there is a possibility that misassembly may occur in which the types are misstacked. After stacking, the fins arranged in the cup are not visible from the outside, so even if there is a mistake in the placement of the first fin and the second fin, it is difficult to distinguish by appearance. In particular, when the height of the first fin and the height of the second fin are the same, the dimensions of the flow path height of the first flow path and the second flow path are the same, making it even more difficult to distinguish by appearance.

[0004] In order to solve the above problems, the present invention provides a structure for preventing misassembly of a stacked heat exchanger of cup-shaped cup plates having rotational symmetry.

Means for Solving the Problems

[0005] The present invention (first invention) provides a cup-shaped first cup plate 1 and second cup plate 2 having planes 1c, 2c and side walls 1d, 2d on their outer circumference, A first fin 3 is positioned inside the cup of the first cup plate 1, and a second fin 4 is positioned inside the cup of the second cup plate 2. The first cup plate 1, first fin 3, second cup plate 2, and second fin 4 are stacked in that order. The core 5 has a group of components 5a, The first fluid 6 flows through the cup of the first cup plate 1. A flow path 7 is formed, and a second flow path 9 is formed within the cup of the second cup plate 2 through which the second fluid 8 flows. The first cup plate 1 is formed with a pair of first communication holes 10 for introducing a first fluid 6 into a first flow path 7 and for guiding it out from within the first flow path 7, and at least a pair of first connection holes 11 for passing a second fluid 8 to the second cup plate 2. The second cup plate 2 has a pair of second channels 9 into which the second fluid 8 is introduced and out of the second channel 9. A communication hole 12 and at least a pair of second connection holes 13 for passing the first fluid 6 to the first cup plate 1 are formed. In the aforementioned group of components, the first communication hole 10 of the first cup plate 1 and the second connection hole 13 of the second cup plate 2 are connected in the stacking direction. In the aforementioned group of components, the first connection hole 11 of the first cup plate 1 and the second communication hole 12 of the second cup plate 2 are connected in the stacking direction. In a heat exchanger where the side walls 1d and 2d of each cup plate 1 and 2 overlap each other, The shapes of the side walls 1d and 2d of each cup plate 1 and 2 have rotational symmetry. The pair of first communication holes 10 and the pair of first connection holes 11, and the pair of second communication holes 12 and the pair of second connection holes 13 are connected to each cup plate. When one of the cup plates, 1 or 2, is moved by a predetermined angle around a central axis perpendicular to the center of planes 1c and 2c, they overlap when viewed from the stacking direction. The first cup plate 1 has a first projection 1a that protrudes toward the first flow channel 7 and a second projection 1b that protrudes toward the opposite side from the first flow channel 7. The second cup plate 2 has a third projection 2a that protrudes toward the first channel 7 and a fourth projection 2b that protrudes toward the second channel 9. The first fin 3 has a first avoidance hole 31a that avoids the first projection 1a of the first cup plate 1 at a position that aligns with the first projection 1a, and a third avoidance hole 32a that avoids the third projection 2a of the second cup plate 2 at a position that aligns with the third projection 2a. The second fin 4 has a second avoidance hole 41b, and a fourth avoidance hole 42b that avoids the fourth projection 2b of the second cup plate 2, in a position that aligns with the fourth projection 2b, thus providing an assembly prevention structure. With respect to the first group of parts 5a, the cup plate is positioned around a central axis perpendicular to the center of planes 1c and 2c. From the same orientation as the first component group 5a When a second group of parts 5b having the same configuration as the first group of parts 5a, which has been rotated by a predetermined angle, is stacked from the stacking direction, when viewed from the stacking direction, The four protrusions of the first component group 5a, namely the first protrusion 1a, the second protrusion 1b, the third protrusion 2a, and the fourth protrusion 2b, do not overlap with each other, and All four protrusions, the first and second protrusions 1a and 1b of the first component group 5a, and the third and fourth protrusions 2a' and 2b' of the second component group 5b, do not overlap with each other, and All four projections, the third and fourth projections 2a and 2b of the first component group 5a, and the first and second projections 1a' and 1b' of the second component group 5b, do not overlap with each other, and The first and second protrusions 1a and 1b of the first component group 5a, and the first of the second component group 5b , 2 The four projections 1a' and 1b' do not overlap with each other, The third and fourth protrusions 2a and 2b of the first component group 5a, and the third of the second component group 5b If all four projections, 2a' and 2b', overlap each other Furthermore, the aforementioned predetermined angle is an angle excluding the angles at which the parts can be assembled normally (0 degrees and 360 degrees). This heat exchanger has a structure that prevents incorrect assembly.

[0006] As an additional configuration of the present invention (first invention), In the rectangle formed by connecting the centers of the pair of first communication holes 10 and the pair of first connecting holes 11 of the first cup plate 1, the pair of first communication holes 10 are formed at one diagonal position, and the pair of first connecting holes 11 are formed at the other diagonal position. A pair of second communication holes 12 of the second cup plate 2 are formed at positions that align with the first connection hole 11, and a pair of second connection holes 13 are formed at positions that align with the first communication hole 10, and the predetermined angle can be set to 90 degrees or 270 degrees. (Claim 2)

[0007] The present invention further allows the peripheral edges of the side walls of the first cup plate 1 and the second cup plate 2 to be formed in a circular or square shape when viewed from the stacking direction. (Claim 3)

[0008] As an additional configuration of the present invention (first invention), In a rectangle formed by connecting the centers of the pair of first communication holes 10 and the pair of first connecting holes 11 of the first cup plate 1, the pair of first communication holes 10 are formed at the end of one of the opposing sides, and the pair of first connecting holes 11 are formed at the end of the other side. A pair of second communication holes 12 of the second cup plate 2 are formed at positions that align with the first connection hole 11, and a pair of second connection holes 13 are formed at positions that align with the first communication hole 10, so that the predetermined angle can be set to 180 degrees. (Claim 4)

[0009] The present invention further allows the peripheral edges of the side walls of the first cup plate 1 and the second cup plate 2 to be formed in a square or rectangular shape when viewed from the stacking direction. (Claim 5)

[0010] The configuration of each of the above inventions can further be configured such that the height h1 of the first fin 3 and the height h2 of the second fin 4 are the same in the stacking direction. (Claim 6) [Effects of the Invention]

[0011] The present invention has the configuration described in the first invention for solving the problem.

[0012] According to this configuration, when the first fin 3 is placed inside the cup of the second cup plate 2, or when the second fin 4 is placed inside the cup of the first cup plate 1, the first protrusions and the third protrusions of the cup plates 1 and 2 interfere with the interference portion 14, which is the portion other than the avoidance holes 31a, 32a, and 42b of the fins 3 and 4, and the heat exchanger cannot be assembled. Also, when one of the cup plates 1 and 2 is overlapped in a state where it is moved by a predetermined angle around the central axis orthogonal to the planes 1c and 2c at the center of the planes 1c and 2c (a state where misassembly of the parts of the heat exchanger has occurred), the protrusions 1a, 2a, and 2b of the cup plates 1 and 2 and the interference portion 14, which is the portion other than the avoidance holes 31a, 32a, and 42b of the fins 3 and 4, interfere with each other in the stacking direction, and the heat exchanger cannot be assembled. By adopting the configuration of the present invention, the types of the cup plates and the fins are not mistaken, and misassembly is surely prevented.

[0013] For example, in a heat exchanger that performs heat exchange with two fluids and has a plurality of first component groups 5a, and the component groups are adjacent to each other (in this case, the protrusion 1b is aligned with the avoidance hole 41b), when the first cup plate 1 and the second cup plate 2 are laminated in a mistaken manner, the protrusions 1a, 1b, 2a, and 2b interfere with the interference portion 14, which is the portion other than the avoidance holes 31a, 32a, 41b, and 42b of the fins 3 and 4, and cannot be assembled. Also, when the first fin 3 and the second fin 4 are laminated in a mistaken manner, the avoidance holes 31a, 32a, 41b, and 42b interfere with the interference portion 14, which is the portion other than the protrusions 1a, 1b, 2a, and 2b of the cup plates 1 and 2, and cannot be assembled.

[0014] As an additional configuration of the present invention (the first invention), in a quadrilateral connecting the centers of the holes 10 and 11 of the pair of first communication holes 10 and the pair of first connection holes 11 of the first cup plate 1, a pair of first communication holes 10 are formed at one diagonal position, and a pair of first connection holes 11 are formed at the other diagonal position. A pair of second communication holes 12 of the second cup plate 2 are formed at positions aligned with the first connection holes 11, and a pair of second connection holes 13 are formed at positions aligned with the first communication holes 10, and the predetermined angle can be set to 90 degrees or 270 degrees. (Claim 2) Therefore, even if one of the cup plates is accidentally moved 90 degrees or 270 degrees around the central axis perpendicular to the center of the plane and stacked, the protrusions 1a, 2a, 2b interfere with the interference portions 14 which are parts other than the avoidance holes 31a, 32a, 42b of the fins 3, 4, and cannot be assembled. Therefore, incorrect assembly can be surely prevented. This additional configuration includes the case where the peripheral edges of the side walls 1d, 2d of each cup plate have an even number of sides such as an octagon (the peripheral edges of the side walls 1d, 2d of each cup plate 1, 2 include shapes with rounded corners and chamfered shapes).

[0015] The present invention can further form the peripheral edges of the side walls 1d, 2d of the first cup plate 1 and the second cup plate 2 into a square or a circle when viewed from the stacking direction. (Claim 3) In this structure as well, incorrect assembly can be surely prevented. The peripheral edge shapes of the side walls 1d, 2d of each cup plate 1, 2 include shapes with rounded corners and chamfered shapes.

[0016] As an additional configuration of the present invention (the first invention), in a quadrilateral connecting the centers of each hole of the pair of first communication holes 10 and the pair of first connection holes 11 of the first cup plate 1, among the pair of opposing sides, a pair of first communication holes 10 are formed at one end of one side, and a pair of first connection holes 11 are formed at the end of the other side, A pair of second communication holes 12 of the second cup plate 2 are formed at positions aligned with the first connection holes 11, and a pair of second connection holes 13 are formed at positions aligned with the first communication holes 10, and the predetermined angle can be set to 180 degrees. (Claim 4) Even in this configuration, if one of the cup plates 1 and 2 is mistakenly moved 180 degrees around a central axis perpendicular to the center of the plane and stacked, the protrusions 1a, 2a, and 2b will interfere with the interference portion 14, which is the part other than the avoidance holes 31a, 32a, and 42b of the fins 3 and 4, making assembly impossible. Therefore, incorrect assembly can be reliably prevented.

[0017] The present invention further allows the periphery of the side walls 1d and 2d of the first cup plate 1 and the second cup plate 2 to be formed into a square and rectangular shape when viewed from the stacking direction. (Claim 5) Even with this structure, incorrect assembly can be reliably prevented. The shape of the edges of the side walls 1d and 2d of each cup plate 1 and 2 includes shapes with rounded corners and shapes with chamfered edges.

[0018] The configuration of each of the above inventions can further be configured such that the height h1 of the first fin 3 and the height h2 of the second fin 4 are the same in the stacking direction of each component. (Claim 6) In this case, if the first fin 3 and the second fin 4 are stacked incorrectly, the protrusions 1a, 2a, and 2b of each cup plate 1 and 2 will interfere with parts of the fins 3 and 4 other than the avoidance holes 31a, 32a, and 42b, making assembly impossible. This prevents misassembly of the internally installed fins, which cannot be seen from the outside. [Brief explanation of the drawing]

[0019] [Figure 1] An exploded perspective view showing an example of a heat exchanger having the misassembly prevention structure of the present invention. [Figure 2] This is an explanatory diagram of the heat exchanger, viewed from the line II-II in Figure 1. [Figure 3] An explanatory diagram showing a heat exchanger having a misassembly prevention structure according to a first embodiment of the present invention, a cross-sectional view showing the properly assembled state when the heights of each fin are different. [Figure 4] An explanatory diagram showing a heat exchanger having a misassembly prevention structure according to a second embodiment of the present invention, a cross-sectional view showing the properly assembled state when each fin height is the same. [Figure 5] An exploded perspective view illustrating the incorrect assembly of the first fin 3 and the second fin 4. [Figure 6] This is an explanatory diagram of the misassembled state, and is a view taken along the line VI-VI in Figure 5. [Figure 7] A partial cross-sectional view showing the incorrectly assembled state. [Figure 8] An exploded perspective view showing a heat exchanger having a misassembly prevention structure according to a third embodiment of the present invention. [Figure 9] An exploded perspective view showing how misassembly can occur between the first group of components 5a and the second group of components 5b that constitute the heat exchanger of the present invention. [Figure 10] View from arrow XX in Figure 9. [Modes for carrying out the invention]

[0020] Next, each embodiment of the present invention will be described based on the drawings. [Examples]

[0021] Figure 1 is an exploded perspective view of a main part showing an example of a heat exchanger having the misassembly prevention structure of the present invention. Figure 2 is an explanatory diagram of the same heat exchanger, viewed from the line II-II in Figure 1. Figure 3 is an explanatory diagram showing a heat exchanger having the misassembly prevention structure of the first embodiment of the present invention, and is a cross-sectional view showing the properly assembled state when the heights of each fin are different. Figure 4 is an explanatory diagram showing a heat exchanger having the misassembly prevention structure of the second embodiment of the present invention, and is a cross-sectional view showing the properly assembled state when the heights of each fin are the same. The heat exchanger of the present invention has a core 5 in which a first group of components 5a is formed by stacking a first cup plate 1, a first fin 3, a second cup plate 2, and a second fin 4 in that order, and the heat exchanger is configured to include multiple such groups of components. The first fin 3 is placed inside the cup of the first cup plate 1, and the second fin 4 is placed inside the cup of the second cup plate 2. A first flow path 7 through which a first fluid 6 flows is formed inside the cup of the first cup plate 1, and a second flow path 9 through which a second fluid 8 flows is formed inside the cup of the second cup plate 2.

[0022] In this embodiment, the core 5 of the heat exchanger has the second fins 4 in contact with the back side of the surface on which the first fins 3 of the first cup plate 1 are located. Similarly, the first fins 3 of the second cup plate 2 have contact with the back side of the surface on which the second fins 4 are located. The first cup plate 1 is formed in the shape of a dish with a flat surface 1c and side walls 1d around its outer circumference, and the second cup plate 2 is also formed in the same way as the first cup plate 1, with a flat surface 2c and side walls 2d around its outer circumference. In this embodiment, the periphery of the side wall 1d of the first cup plate 1 and the periphery of the side wall 2d of the second cup plate 2 are formed in a rectangular shape when viewed from the stacking direction of each component. The rectangular periphery may include those with rounded corners or chamfered edges.

[0023] The first cup plate 1 is formed with a pair of first communication holes 10 for introducing the first fluid 6 into the first flow path 7 and for leading the fluid out of the first flow path 7, and a pair of first connection holes 11 for passing the second fluid 8 to the second cup plate 2. The second cup plate 2 is formed with a pair of second communication holes 12 for introducing the second fluid 8 into the second channel 9 and for guiding it out from within the second channel 9, and a pair of second connection holes 13 for passing the first fluid 6 to the first cup plate 1.

[0024] In this embodiment, in a rectangle formed by connecting the centers of the pair of first communication holes 10 and the pair of first connection holes 11 of the first cup plate 1, the pair of first communication holes 10 are formed at the end of one side of a pair of opposing sides, and the pair of first connection holes 11 are formed at the end of the other side. Furthermore, a pair of second communication holes 12 in the second cup plate 2 are formed at positions that align with the first connection holes 11 of the first cup plate 1, and a pair of second connection holes 13 are formed at positions that align with the first communication holes 10 of the first cup plate 1.

[0025] In this embodiment, as shown in Figures 1, 2, 3, and 4, in order to prevent misassembly of the first cup plate 1, the first fin 3, the second cup plate 2, and the second fin 4, a first projection 1a protruding toward the first channel 7 and a second projection 1b protruding toward the second channel 9 are formed on the flat surface 1c of the first cup plate 1. A third projection 2a protruding toward the first channel 7 and a fourth projection 2b protruding toward the second channel 9 are formed on the flat surface 2c of the second cup plate 2. Furthermore, the first fin 3 has a first avoidance hole 31a that avoids the first projection 1a of the first cup plate 1 at a position that aligns with the first projection 1a, and a third avoidance hole 32a that avoids the third projection 2a of the second cup plate 2 at a position that aligns with the third projection 2a of the second cup plate 2. The second fin 4 has a second avoidance hole 41b that avoids the second projection 1b of the first cup plate 1 at a position that aligns with the second projection 1b, and a fourth avoidance hole 42b that avoids the fourth projection 2b of the second cup plate 2 at a position that aligns with the fourth projection 2b of the second cup plate 2.

[0026] When the components constituting the core 5 are assembled correctly, each protrusion 1a, 1b, 2a, and 2b will be housed within the respective avoidance holes 31a, 32a, 41b, and 42b, as shown in Figures 3 and 4. When each protrusion 1a, 1b, 2a, and 2b is projected from the stacking direction of each component, the positions of each first protrusion 1a, each second protrusion 1b, each third protrusion 2a, and each fourth protrusion 2b are formed so that they do not overlap. In this case, the first communication hole 10 of the first cup plate 1 and the second connecting hole 13 of the second cup plate 2 are connected in the stacking direction at the edges of their respective holes 10 and 13, and the first connecting hole 11 of the first cup plate 1 and the second communication hole 12 of the second cup plate 2 are connected in the stacking direction at the edges of their respective holes 11 and 12. Furthermore, the side walls 1d and 2d of each cup plate 1 and 2 overlap each other.

[0027] In the first embodiment, as shown in Figure 3, the height h2 of the second fin 4 is formed to be higher than the height h1 of the first fin 3. Each projection 1a, 1b, 2a, and 2b only needs to be housed in the respective avoidance holes 31a, 32a, 41b, and 42b of each fin 3 and 4. Therefore, as shown in Figure 3, the top of the second projection 1b of the first cup plate 1 and the top of the fourth projection 2b of the second cup plate 2 may be spaced apart from the plane of the opposing plates. As in this embodiment, when the height h1 of the first fin 3 and the height h2 of the second fin 4 are different, it may be possible to notice a fin mix-up after stacking, but this configuration can prevent such mix-ups from occurring in the first place. [Examples]

[0028] In the second embodiment, as shown in Figure 4, the height h1 of the first fin 3 and the height h2 of the second fin 4 are the same. When the heat exchanger core 5 is assembled correctly, each projection 1a, 1b, 2a, and 2b is housed in the respective avoidance holes 31a, 32a, 41b, and 42b of each fin 3 and 4, and as shown in Figure 4, the tops of each projection 1a, 1b, 2a, and 2b of each cup plate 1 and 2 are close to the plane of the plate opposite to it. In the case where the height h1 of the first fin 3 and the height h2 of the second fin 4 are different, in the second embodiment, it is difficult to notice after lamination, but if an incorrect assembly occurs, the individual parts cannot be assembled, so the incorrect assembly can be noticed during the assembly process.

[0029] Each cup plate 1 and 2 used in this embodiment has rotational symmetry except for the positions of the protrusions 1a, 1b, 2a, and 2b. In other words, the pair of first communication holes 10 and the pair of first connecting holes 11, and the pair of second communication holes 12 and the pair of second connecting holes 13 are formed in positions that overlap each other when viewed from the stacking direction if one of the cup plates 1 and 2 is mistakenly rotated 180 degrees in this embodiment around a central axis perpendicular to the center of the plane. Furthermore, since the plates themselves also have rotational symmetry, the structure is prone to misassembly. In this case, there is a possibility of incorrectly assembling the components of the core 5 by mistakenly rotating one of the cup plates 1 and 2 by 180 degrees around a central axis perpendicular to the center of the plane, or by mixing up the fins 3 and 4. Figures 5, 6, and 7 show an example of an incorrect assembly, where the first fin 3, which should be placed in the first cup plate 1, is mistakenly placed in the second fin 4, which should be placed in the second cup plate 2.

[0030] As shown in Figure 5, if the second fin 4 is mistakenly placed inside the cup of the first cup plate 1 and the first fin 3 is placed inside the cup of the second cup plate 2, the first projection 1a of the first cup plate 1 and the third projection 2a of the second cup plate 2 will come into contact with the interference parts 14 (see the × marks in Figure 5) other than the respective avoidance holes 41b and 42b of the second fin 4, and will interfere with each other. Similarly, the second projection 1b of the first cup plate 1 and the fourth projection 2b of the second cup plate 2 contact and interfere with the interference portion 14 (see the × marks in Figure 5) other than the respective avoidance holes 31a and 32a of the first fin 3. If there is interference between the components, as shown in Figure 7, a gap will be created between each cup plate 1, 2 and each fin 3, 4, making it impossible to assemble the core 5. Therefore, it is easy to prevent incorrect assembly due to mixing up the first fin 3 and the second fin 4.

[0031] In this embodiment, the eight positions obtained by projecting the protrusions 1a, 1b, 2a, and 2b from the stacking direction of each component when the protrusions 1a, 1b, 2a, and 2b of each cup plate 1 and 2 are housed in the respective avoidance holes 31a, 32a, 41b, and 42b of each fin 3 and 4, and the eight positions obtained by projecting the protrusions 1a, 1b, 2a, and 2b when one of the cup plates 1 and 2 is moved by a predetermined angle around a central axis perpendicular to the center of the plane (see Figure 6), are formed in positions where these eight positions do not overlap with each other. Therefore, even if one of the cup plates 1 and 2 is mistakenly rotated 180 degrees around a central axis perpendicular to the center of the plane, in a direction that would cause misassembly, the components constituting the core will interfere with each other, making it impossible to assemble the components, thus easily preventing misassembly. In the first embodiment, the edges of the side walls 1d and 2d of each cup plate 1 and 2 are formed in a rectangular shape, but they can be replaced with squares (including those with rounded corners) or circles. In this example, since the edges of the side walls 1d and 2d of each cup plate 1 and 2 are formed in a rectangular shape, the angle by which one cup plate is moved by a predetermined angle around a central axis perpendicular to the center of the plane is 180°. However, there can be multiple patterns of movement of this predetermined angle, depending on the shape of the periphery of the side walls 1d and 2d of each cup plate 1 and 2. For example, in the case of the square shape described above, there are three patterns of movement of the predetermined angle: 90°, 180°, and 270°. [Examples]

[0032] Next, Figure 8 shows a third embodiment of the present invention. Unlike the first embodiment, in the third embodiment, in the rectangle formed by connecting the centers of the pair of first communication holes 10 and the pair of first connection holes 11 of the first cup plate 1, the pair of first communication holes 10 are formed at one diagonal position, and the pair of first connection holes 11 are formed at the other diagonal position. Furthermore, the pair of second communication holes 12 of the second cup plate 2 are formed at positions that align with the first connection holes 11, and the pair of second connection holes 13 are formed at positions that align with the first communication holes 10. Furthermore, the edges of the side walls 1d and 2d of each cup plate 1 and 2 in this example are formed in the shape of a square (including shapes with rounded corners and chamfered edges). In this case, misassembly occurs when one of the cup plates 1 and 2 is rotated 90 or 270 degrees around a central axis perpendicular to the center of the plane. In this example, the edges of the side walls 1d and 2d of each cup plate 1 and 2 are formed in a square shape, but instead, the edges of the side walls 1d and 2d may be made circular.

[0033] Figure 9 is an exploded perspective view showing how misassembly can occur between the first group of components 5a and the second group of components 5b that constitute the heat exchanger of the present invention, and Figure 10 is a view taken along arrow XX in Figure 9. The first component group 5a in Figure 9 is the same as the first component group 5a in the first or second embodiment. In this example, the second component group 5b is further stacked. In the second component group 5b, all components—the first cup plate 1, the first fin 3, the second cup plate 2, and the second fin 4—are rotated 180° around a central axis that is orthogonal to the center of the planes of plates 1 and 2 in the first component group 5a. The first projection 1a' of the first cup plate 1 of the second component group 5b enters the first avoidance hole 31a' of the first fin 3, the third projection 2a' of the second cup plate 2 of the second component group 5b enters the third avoidance hole 32a' of the first fin 3, and the fourth projection 2b' of the second cup plate 2 of the second component group 5b enters the fourth avoidance hole 42b' of the second fin 4. As shown in Figure 10, each projection does not enter any other avoidance hole that it is meant to align with. Therefore, in the examples shown in Figures 9 and 10, the second projection 1b' of the first cup plate 1 of the second component group 5b interferes with the interference portion 14 (see the × mark in Figure 9), which is the part of the second fin 4 of the first component group 5a other than the avoidance hole, making it impossible to assemble the heat exchanger.

[0034] The embodiments shown in the drawings are examples where the periphery of the side walls 1d and 2d of each cup plate 1 and 2 is rectangular or square, but the present invention is not limited to these and can also be applied to those in which the periphery is formed as a polygon with an even number of sides (for example, an octagon). In this case, misassembly occurs when one of the cup plates 1 and 2 is moved by a predetermined angle around a central axis perpendicular to the center of the plane, corresponding to the shape of a polygon. The present invention is also applicable when a third fin and a third cup plate are provided on the outside of the first component group 5a, and protrusions and avoidance holes are provided in the same way as the first and second fins and the first and second plates, and when three or more fluids flow through the heat exchanger, the second protrusion 1b aligns with the avoidance hole of the third fin and the second avoidance hole 41b aligns with the protrusion of the third cup plate. [Industrial applicability]

[0035] It is widely applicable to heat exchangers that stack cup plates having rotational symmetry. [Explanation of Symbols]

[0036] 1. First cup plate 1a 1st protrusion 1a' First projection (second component group) 1b 2nd protrusion 1b' Second projection (second component group) 1c plane 1d side wall 2. Second cup plate 2a 3rd protrusion 2a' Third projection (second component group) 2b 4th protrusion 2b' Fourth projection (second component group) 2c plane 2d side wall

[0037] 3. First Fin 31a 1st avoidance hole 31a' First avoidance hole (second component group) 32a 3rd avoidance hole 32a' Third avoidance hole (second component group) 4. Second Fin 41b 2nd avoidance hole 41b' Second avoidance hole (second component group) 42b 4th avoidance hole 42b' Fourth avoidance hole (second component group) 5 cores 5a 1st parts group 5b Second component group

[0038] 6 1st fluid 7. First channel 8 Second fluid 9. Second channel 10 1st communication hole 11 First connection hole 12 2nd communication hole 13. Second connection hole 14 Interference area h1 Height of the first fin h2 Height of the second fin

Claims

1. A cup-shaped first cup plate (1) and second cup plate (2) having a flat surface (1c, 2c) and side walls (1d, 2d) on their outer periphery, A first fin (3) positioned inside the cup of the first cup plate (1), and a second fin (4) positioned inside the cup of the second cup plate (2), The first cup plate (1), first fin (3), second cup plate (2), and second fin (4) are stacked in that order. It has a core (5) which includes a group of components (5a), The first fluid (6) flows through the cup of the first cup plate (1) A flow path (7) is formed, and a second flow path (9) is formed in the cup of the second cup plate (2) through which the second fluid (8) flows. The first cup plate (1) is formed with a pair of first communication holes (10) for introducing a first fluid (6) into a first flow path (7) and for guiding it out from within the first flow path (7), and at least a pair of first connection holes (11) for passing a second fluid (8) to the second cup plate (2). The second cup plate (2) has a pair of second channels (9) for introducing the second fluid (8) into the second channel (9) and for guiding it out from within the second channel (9). A communication hole (12) and at least a pair of second connection holes (13) for passing the first fluid (6) to the first cup plate (1) are formed. In the aforementioned group of components, the first communication hole (10) of the first cup plate (1) and the second connecting hole (13) of the second cup plate (2) are connected in the stacking direction. In the aforementioned group of components, the first connecting hole (11) of the first cup plate (1) and the second communication hole (12) of the second cup plate (2) are connected in the stacking direction. In a heat exchanger where the side walls (1d, 2d) of each cup plate (1, 2) overlap each other, The shapes of the side walls (1d, 2d) of each cup plate (1, 2) have rotational symmetry. The pair of first communication holes (10) and the pair of first connection holes (11), and the pair of second communication holes (12) and the pair of second connection holes (13) are connected to each cup plate ( 1) When one of the cup plates (1c, 2) is moved by a predetermined angle around a central axis perpendicular to the center of the plane (1c, 2c), they overlap when viewed from the stacking direction. The first cup plate (1) has a first projection (1a) that protrudes toward the first flow path (7), and the first It has a second projection (1b) that protrudes on the side opposite to the flow path (7), The second cup plate (2) has a third protruding towards the first flow path (7) It has a projection (2a) and a fourth projection (2b) that protrudes toward the second flow channel (9), The first fin (3) has a first avoidance hole (31a) at a position that aligns with the first projection (1a) of the first cup plate (1) to avoid the first projection (1a), and a third avoidance hole (31a) at a position that aligns with the third projection (2a) of the second cup plate (2) to avoid the third projection (2a). It has a relief hole (32a), The second fin (4) has a second avoidance hole (41b), and the second cup plate (2) has a fourth avoidance hole (42b) at a position that aligns with the fourth projection (2b) to avoid the fourth projection (2b), thus providing a misassembly prevention structure. When a second group of parts (5b) having the same configuration as the first group of parts (5a) is stacked on top of the first group of parts (5a) from the stacking direction, by rotating the cup plate by a predetermined angle around a central axis perpendicular to the center of the plane (1c, 2c), from the same orientation as the first group of parts (5a), and when viewed from the stacking direction, The four protrusions of the first component group (5a), namely the first protrusion (1a), the second protrusion (1b), the third protrusion (2a), and the fourth protrusion (2b), do not overlap with each other, and The first and second protrusions (1a, 1b) of the first component group (5a), and the third protrusion of the second component group (5b) , all four projections (2a', 2b') do not overlap with each other, The third and fourth protrusions (2a, 2b) of the first component group (5a), and the first of the second component group (5b) , all four projections of the two projections (1a', 1b') do not overlap with each other, The first and second protrusions (1a, 1b) of the first component group (5a), the second component group ( 5b) The four projections of the first and second projections (1a', 1b') do not overlap with each other, The third and fourth protrusions (2a, 2b) of the first component group (5a), and the third of the second component group (5b) A structure for preventing misassembly of a heat exchanger, characterized in that all four protrusions (2a', 2b') do not overlap with each other, and the predetermined angle is an angle excluding the angle at which it can be assembled normally (0 degrees or 360 degrees).

2. In the heat exchanger misassembly prevention structure described in claim 1, In a rectangle formed by connecting the centers of the pair of first communication holes (10) and the pair of first connecting holes (11) of the first cup plate (1), the pair of first communication holes (10) are formed at one diagonal position, and the pair of first connecting holes (11) are formed at the other diagonal position. A pair of second communication holes (12) of the second cup plate (2) are formed at positions that align with the first connection hole (11), and a pair of second connection holes (13) are formed at positions that align with the first communication hole (10). A structure to prevent misassembly of a heat exchanger, wherein the predetermined angle is 90 degrees or 270 degrees.

3. In the heat exchanger misassembly prevention structure described in claim 2, A structure for preventing misassembly of a heat exchanger, wherein the periphery of the side walls of the first cup plate (1) and the second cup plate (2) is circular or square when viewed from the stacking direction.

4. In the heat exchanger misassembly prevention structure described in claim 1, In a rectangle formed by connecting the centers of the pair of first communication holes (10) and the pair of first connecting holes (11) of the first cup plate (1), the pair of first communication holes (10) are formed at the end of one side of a pair of opposing sides, and the pair of first connecting holes (11) are formed at the end of the other side. A pair of second communication holes (12) of the second cup plate (2) are formed at positions that align with the first connection hole (11), and a pair of second connection holes (13) are formed at positions that align with the first communication hole (10). A structure to prevent misassembly of a heat exchanger where the predetermined angle is 180 degrees.

5. In the heat exchanger misassembly prevention structure described in claim 4, A structure for preventing misassembly of a heat exchanger, wherein the periphery of the side walls of the first cup plate (1) and the second cup plate (2) is square or rectangular when viewed from the stacking direction.

6. In the heat exchanger misassembly prevention structure according to any one of claims 1 to 5, A structure for preventing misassembly of a heat exchanger, characterized in that the height (h1) of the first fin (3) and the height (h2) of the second fin (4) are the same in the stacking direction.

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