heat exchanger

Abstract

To provide a laminated heat exchanger that prevents water from splashing onto the central circuit while ensuring corrosion resistance. [Solution] The heat exchanger 100 is constructed by stacking a plurality of cup plates 10 having through holes, and alternately forming a first fluid channel for a first fluid and a second fluid channel for a second fluid between each cup plate 10, and a central circuit consisting of the through holes of the plurality of cup plates 10 is in communication with the outside without communicating with the first fluid channel and the second fluid channel, and comprises a first flange 2 on one end side in the stacking direction of the plurality of cup plates 10 and a second flange 3 of the first flange 2 on the opposite side from the cup plates 10. The first flange 2 has a first ventilation hole that partially overlaps with the through hole, and the second flange 3 has a second ventilation hole that penetrates through to a first opening that partially overlaps with the first ventilation hole on the side of the first flange 2 and a second opening that does not overlap with the through hole on the opposite side from the first flange 2.

Description

Technical Field

[0001] The present invention relates to a heat exchanger including a plurality of stacked cup plates.

Background Art

[0002] Some heat exchangers are formed by stacking a plurality of cup plates shaped like dishes having flat bottom surfaces, and alternately forming a first fluid flow path for allowing a first fluid to flow and a second fluid flow path for allowing a second fluid to flow between the respective cup plates.

[0003] For example, in Patent Document 1, a plate stack type heat exchanger stacks a large number of first and second core plates, and the peripheral portions and the edges of the central holes of the respective core plates are in contact with each other, and a first fluid flow path and a second fluid flow path are alternately formed between the respective core plates. A cylindrical portion is formed at the edge of the central hole of each core plate in the stacking direction of the core plates, and the first fluid flow path and the second fluid flow path are formed in an arc shape around the cylindrical portion, and the spaces between the respective core plates are brazed.

[0004] In the conventional heat exchanger as described above, a central circuit formed by the central holes of the cup plates (core plates) can allow fluid to flow in the stacking direction of the cup plates. However, this heat exchanger may be applied without using the central circuit. In this case, it is necessary to open the central circuit to the atmosphere for degassing during brazing.

[0005] For example, in a plate stack type heat exchanger, in order to open the central circuit to the atmosphere, not only is the central circuit opened to the atmosphere during brazing, but also a structure is applied in which the central circuit is exposed to the atmosphere so that the central circuit is opened to the atmosphere even when mounted on a vehicle. Alternatively, in a plate stack type heat exchanger, in order to open the central circuit to the atmosphere, the central circuit is opened to the atmosphere during brazing, while a structure is applied in which the central circuit is connected to an oil circuit when mounted on a vehicle to create an oil pool in the central circuit.

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-11976 [Overview of the project] [Problems that the invention aims to solve]

[0007] Incidentally, among cup-plate stacked heat exchangers, there are water-water heat exchangers in which cooling water is applied to both the first fluid (heat exchange medium) flowing through the first fluid channel and the second fluid (heat transfer medium) flowing through the second fluid channel. However, since water-water heat exchangers do not have an oil circuit, it is not possible to apply a structure that creates an oil reservoir in the central circuit. Furthermore, if a water reservoir is created in the central circuit instead of an oil reservoir, it is not possible to ensure the corrosion resistance of the central circuit. Alternatively, if a structure is applied in which the central circuit of a water-water heat exchanger is exposed to the atmosphere, it is not possible to prevent water from splashing onto the central circuit, and in order to ensure the corrosion resistance of the central circuit, it becomes necessary to form the cup plates constituting the central circuit relatively thick.

[0008] The present invention aims to provide a laminated heat exchanger that prevents water from splashing onto the central circuit and ensures corrosion resistance, taking the above circumstances into consideration. [Means for solving the problem]

[0009] To achieve the above objectives, in the present invention, the heat exchanger 100 is formed by stacking a plurality of cup plates 10 having through holes 27 in the center, and alternately forming a first fluid passage 30 and a second fluid passage between each cup plate 10, and a first fluid which is a heat exchange medium corrosive to metal flows through the first fluid passage 30, and a second fluid which undergoes heat exchange with the first fluid flows through the second fluid passage, wherein the central circuit 33 consisting of the through holes 27 of the plurality of cup plates 10 is not in communication with the first fluid passage 30 and the second fluid passage, but is in communication with the outside, and the plurality of cup plates The device comprises a first flange 2 attached to one end of the cup plate 10 in the stacking direction, and a second flange 3 attached to the first flange 2 on the opposite side of the cup plate 10, wherein the first flange 2 has a first ventilation hole 40 that partially overlaps with the through hole 27 when viewed from the stacking direction, and the second flange 3 has a second ventilation hole 41 formed through a first opening 41a positioned on the first flange 2 side so as to partially overlap with the first ventilation hole 40 when viewed from the stacking direction, and a second opening 41b positioned on the opposite side of the first flange 2 so as not to overlap with the through hole 27 when viewed from the stacking direction.

[0010] In the present invention, the first flange 2 is formed to have a first thickness that is thicker than the cup plate 10, and the second flange 3 is formed to have a second thickness that is thicker than the cup plate 10.

[0011] In the present invention, the plurality of cup plates 10 are stacked in the longitudinal direction of the vehicle to which the heat exchanger 100 is attached, the first flange 2 has a first ventilation hole 40 whose center is offset downward from the center of the through hole 27, and the second flange 3 has an upper end positioned offset downward from the upper end of the first ventilation hole 40 and has two second openings 41b provided offset to the left and right of the first ventilation hole 40. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a laminated heat exchanger that prevents water from splashing onto the central circuit while ensuring corrosion resistance. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view showing a heat exchanger according to one embodiment of the present invention. [Figure 2] This is a front view showing a heat exchanger according to one embodiment of the present invention. [Figure 3] This is an exploded perspective view showing the rear of a heat exchanger according to one embodiment of the present invention. [Figure 4] This is a cross-sectional view taken along the line IV-IV in Figure 2. [Figure 5] This is a cross-sectional view taken along the VV line in Figure 2. [Figure 6] This is a cross-sectional view taken along the line VI-VI in Figure 2. [Modes for carrying out the invention]

[0014] Hereinafter, a heat exchanger 100 according to one embodiment of the present invention will be described with reference to the drawings. Figure 1 is a perspective view showing the heat exchanger 100, Figure 2 is a front view showing the heat exchanger 100, and Figure 3 is an exploded perspective view partially showing the rear of the heat exchanger 100. Figure 4 is a cross-sectional view taken along the line IV-IV in Figure 2, Figure 5 is a cross-sectional view taken along the line VV in Figure 2, and Figure 6 is a cross-sectional view taken along the line VI-VI in Figure 2. In each figure, U, Lo, L, R, Fr, and Rr indicate top, bottom, left, right, front, and rear, respectively.

[0015] The heat exchanger 100 is a water-water heat exchanger that performs heat exchange between a first fluid using cooling water such as LLC (Long Life Coolant), which is a mixture of ethylene glycol or the like and water, as a heat exchange medium, and a second fluid using the cooling water as a heat medium, by flowing the two fluids through different adjacent flow paths. The heat exchanger 100 is applied to, for example, a battery warmer of a vehicle such as an automobile. In particular, in the present embodiment, the heat exchanger 100 is configured as a plate stack type heat exchanger having a core 1 including a plurality of stacked cup plates 10.

[0016] The heat exchanger 100 includes a core 1, a first flange 2, and a second flange 3. The first flange 2 is joined to the rear end of the core 1, and the second flange 3 is joined to the rear surface of the first flange 2. By fixing the second flange 3 to a vehicle or the like with a fastening member such as a bolt, the heat exchanger 100 is attached to the vehicle or the like.

[0017] The heat exchanger 100 includes a first introduction pipe 4 for introducing the first fluid and a first discharge pipe 5 for discharging the first fluid. The heat exchanger 100 also includes a second introduction pipe 6 for introducing the second fluid and a second discharge pipe 7 for discharging the second fluid. ​​​​​​​​​​The top plate 11 is laminated at one end (front end) in the stacking direction of the plurality of cup plates 10 and joined to the frontmost cup plate 10 by brazing. The bottom plate 12 is laminated at the other end (rear end) in the stacking direction of the plurality of cup plates 10 and joined to the rearmost cup plate 10 by brazing.

[0021] In addition, in the present embodiment, an example in which each of the cup plates 10, the top plate 11, and the bottom plate 12 is formed in a similar rectangular shape when viewed from the stacking direction will be described. However, the present invention is not limited to this example, and each of the cup plates 10, the top plate 11, and the bottom plate 12 may be formed in a similar circular shape, polygonal shape, or other shape when viewed from the stacking direction.

[0022] The core 1 has a first fluid introduction hole 20 for introducing the first fluid into the core 1 and a first fluid discharge hole 21 for discharging the first fluid from the core 1 at one end (front end) in the stacking direction on the top plate 11. Further, the core 1 has a second fluid introduction hole 22 for introducing the second fluid into the core 1 and a second fluid discharge hole 23 for discharging the second fluid from the core 1 at one end (front end) in the stacking direction on the top plate 11.

[0023] The first fluid introduction hole 20 and the first fluid discharge hole 21 are arranged at positions facing each other across the center of the core 1 when viewed from the stacking direction, and for example, are arranged diagonally in the rectangular core 1. The second fluid introduction hole 22 and the second fluid discharge hole 23 are arranged at positions facing each other across the center of the core 1 when viewed from the stacking direction, and for example, are arranged diagonally in the rectangular core 1. In the core 1, the first fluid introduction hole 20, the second fluid introduction hole 22, the first fluid discharge hole 21, and the second fluid discharge hole 23 are arranged at equal intervals in this order in the outer peripheral direction when viewed from the stacking direction.

[0024] Specifically, in the rectangular top plate 11, the first fluid introduction hole 20 is provided at the first corner, and the first fluid discharge hole 21 is provided at the second corner facing the first corner. Further, the second fluid introduction hole 22 is provided at the third corner other than the first and second corners, and the second fluid discharge hole 23 is provided at the fourth corner facing the third corner.

[0025] A first inlet pipe 4 is attached to the first fluid inlet hole 20, and a first discharge pipe 5 is attached to the first fluid discharge hole 21. A second inlet pipe 6 is attached to the second fluid inlet hole 22, and a second discharge pipe 7 is attached to the second fluid discharge hole 23.

[0026] The top plate 11 consists of, for example, a rear member 11a and a front member 11b. The first fluid inlet hole 20 and the first fluid outlet hole 21 are formed through both the rear member 11a and the front member 11b and are connected to the first fluid flow path 30, which will be described later. The top plate 11 has a central connection hole 24 that is formed in the center of the core 1 when viewed from the stacking direction, and is formed through only the rear member 11a, and the central connection hole 24 is connected to the central circuit 33, which will be described later.

[0027] Each cup plate 10 has an upstream first communication hole 25 and a downstream first communication hole 26 that penetrate in the front-to-back direction to allow the first fluid to flow in the stacking direction, at positions corresponding to the first fluid introduction hole 20 and the first fluid discharge hole 21 when viewed from the stacking direction. Each cup plate 10 has a through hole 27 in the center of the core 1 when viewed from the stacking direction, which penetrates in the front-to-back direction to allow the first fluid to flow in the stacking direction.

[0028] Furthermore, each cup plate 10 has an upstream second communication hole (not shown) and a downstream second communication hole (not shown) that penetrate in the front-to-back direction to allow the second fluid to flow in the stacking direction, at positions corresponding to the second fluid introduction hole 22 and the second fluid discharge hole 23 when viewed from the stacking direction. The first communication hole 25 and the first communication hole 26 and the second communication hole are provided alternately at equal intervals along the outer circumference of the cup plate 10 when viewed from the stacking direction.

[0029] Furthermore, the multiple cup plates 10 are stacked such that, when viewed from the stacking direction, each of the first communication holes 25, first communication holes 26, through holes 27, and second communication holes of each cup plate 10 is in the same position. As a result, in the multiple cup plates 10, an upstream first fluid channel 30 and a downstream first fluid channel 31 are formed at positions corresponding to the first communication holes 25 and 26 through which the first fluid flows in the stacking direction, and a cylindrical central circuit 33 is formed at a position corresponding to the through hole 27. In addition, in the multiple cup plates 10, an upstream second fluid channel (not shown) and a downstream second fluid channel (not shown) are formed at positions corresponding to the upstream second communication hole and the downstream second communication hole through which the second fluid flows in the stacking direction.

[0030] The upstream first fluid passage 30, consisting of each first communication hole 25 on the upstream side, is connected to the first fluid inlet hole 20, the downstream first fluid passage 31, consisting of each first communication hole 26 on the downstream side, is connected to the first fluid outlet hole 21, and the central circuit 33, consisting of each through hole 27, is connected to the central connection hole 24.

[0031] Each cup plate 10 is constructed by stacking a first cup plate 10a and a second cup plate 10b, both formed in a dish shape with a flat bottom surface. In other words, the first cup plate 10a is stacked in front of the second cup plate 10b. The first communication holes 25, 26, through hole 27, and second communication hole penetrate the stacked first cup plate 10a and second cup plate 10b in the stacking direction.

[0032] In two cup plates 10 that are continuous front to back, between the first cup plate 10a of the rear cup plate 10 and the second cup plate 10b of the front cup plate 10, the corresponding second communication holes 27 are connected to each other, rather than connecting the corresponding first communication holes 25 to each other or the first communication holes 26 to each other, thereby forming a first fluid passage 32 through which the first fluid flows horizontally (in the planar direction of the cup plate 10) between the first fluid passage 30 and the first fluid passage 31. Similarly, between the foremost cup plate 10 and the top plate 11, the first fluid passage 32 is formed through which the first fluid flows horizontally (in the planar direction of the cup plate 10) between the first fluid passage 30 and the first fluid passage 31, rather than connecting the first communication holes 25 to each other or the first communication holes 26 to each other or the top plate 11, by connecting the second communication holes 27 to each other or the through holes 27 to each other.

[0033] In one cup plate 10, between the first cup plate 10a and the second cup plate 10b, the corresponding second communication holes are not connected to each other, but the corresponding first communication holes 25, first communication holes 26, and through holes 27 are connected to each other, thereby forming a second fluid channel (not shown) through which the second fluid flows horizontally (in the planar direction of the cup plate 10) between the second fluid channels in the stacking direction.

[0034] In multiple cup plates 10, the central circuit 33 formed by connecting the through holes 27, regardless of whether they are the first cup plate 10a or the second cup plate 10b, is separated from the horizontal first fluid flow path 32 and the horizontal second fluid flow path.

[0035] As shown in Figures 1 and 2, the bottom plate 12 has a central connecting hole 24 that penetrates in the front-to-back direction at a position corresponding to the through-hole 27 of each cup plate 10 when viewed from the stacking direction. The bottom plate 12 is stacked on the last cup plate 10 with the central connecting hole 24 and the through-hole 27 of each cup plate 10 aligned.

[0036] The first flange 2 is provided on the rear surface of the core 1 and is formed to a size that includes at least the outer circumference shape of the core 1 when viewed from the stacking direction, and may, for example, have the same outer circumference shape as the core 1. The first flange 2 is formed to have a first thickness that is thicker than the cup plate 10. The first flange 2 is made of clad material having brazing material and is joined to one end (rear end) of the core 1 in the stacking direction, i.e., the bottom plate 12, by brazing.

[0037] The first flange 2 is formed in a flat plate shape and has a first ventilation hole 40 that penetrates in the front-to-back direction near the center. The first ventilation hole 40 may be formed with a smaller diameter than the central connection hole 24 and the through hole 27. When the first flange 2 is attached to the core 1, the first ventilation hole 40 is formed in a position that partially overlaps with the central connection hole 24 and the through hole 27 of the core 1 when viewed from the stacking direction. As a result, the first ventilation hole 40 is formed in a position that partially overlaps with the central connection hole 24 and the through hole 27, and also partially overlaps with the central circuit 33 when viewed from the stacking direction.

[0038] Specifically, when the heat exchanger 100 is mounted on a vehicle such that the stacking direction of the multiple cup plates 10 is in the front-to-back direction, the first ventilation hole 40 is formed so that its center is offset downward from the center of the central connection hole 24 or through hole 27 of the core 1 in the vertical direction. The first ventilation hole 40 may be formed so that the position of its center in the left-to-right direction is the same as the position of the center of the central connection hole 24 or through hole 27 in the left-to-right direction. As a result, when viewed from the stacking direction, only the upper part of the first ventilation hole 40 overlaps the lower part of the central connection hole 24 or through hole 27.

[0039] The second flange 3 is attached to the first flange 2 on the opposite side from the core 1 (cup plate 10) and is provided on the rear surface of the first flange 2. When viewed from the stacking direction, it is formed to a size that includes at least the outer circumference of the core 1. The second flange 3 is formed to have a first thickness that is thicker than the cup plate 10. The second thickness of the second flange 3 may be thicker than the first thickness of the first flange 2. The second flange 3 is made of clad material with brazing material and is joined to the first flange 2 by brazing.

[0040] For example, the second flange 3 may be formed with a mounting portion that extends outward from the outer circumference of the core 1, and the mounting portion may have fastening holes for attaching it to the vehicle with bolts or the like. The second flange 3 may also be attached to the vehicle via a sealing material (not shown), such as an O-ring seal.

[0041] The second flange 3 is formed in a flat plate shape and has a second ventilation hole 41 that penetrates in the front-to-back direction near the center. The second ventilation hole 41 is formed to penetrate a first opening 41a on the side of the first flange 2 and a second opening 41b on the opposite side of the second flange 2. The second opening 41b may be formed with a diameter smaller than the central connection hole 24 and through hole 27 of the core 1, and may be formed with approximately the same diameter as the first ventilation hole 40.

[0042] The second ventilation hole 41 is formed with the first flange 2 attached to the core 1 and the second flange 3 attached to the first flange 2, such that the second opening 41b does not overlap with the central connection hole 24 or the through hole 27 when viewed from the stacking direction. For example, the second opening 41b is formed in a position that does not overlap with the central connection hole 24 or the through hole 27 in the first direction (vertical direction) perpendicular to the stacking direction. As a result, the second opening 41b of the second ventilation hole 41 is formed in a position that does not overlap with the central circuit 33 consisting of the central connection hole 24 or the through hole 27 when viewed from the stacking direction.

[0043] Furthermore, the second ventilation hole 41 is formed by arranging the first opening 41a so as to partially overlap with the first ventilation hole 40 of the first flange 2. For example, the first opening 41a is formed in a position that partially overlaps with the first ventilation hole 40 of the first flange 2 in the stacking direction and the first direction, but does not overlap with the first ventilation hole 40 in the second direction (left-right direction) perpendicular to the first direction.

[0044] Furthermore, the first opening 41a has a shape that extends horizontally near the center of the front surface of the first flange 2, and is formed in a position that partially overlaps slightly with the central connection hole 24 and through hole 27 of the core 1 when viewed from the stacking direction, and also partially overlaps with the first ventilation hole 40 of the first flange 2. The first opening 41a may be formed with a vertical length that is slightly longer than the diameter of the second opening 41b, or it may be formed with a vertical length that is approximately the same as the diameter of the first ventilation hole 40. The second flange 3 has two second openings 41b at both the left and right ends of the first opening 41a when viewed from the stacking direction.

[0045] Specifically, when the heat exchanger 100 is mounted on a vehicle such that the stacking direction of the multiple cup plates 10 is in the front-to-back direction, the first opening 41a is formed such that its upper part overlaps with the lower part of the central connection hole 24 or through hole 27 of the core 1 by a predetermined first interval A in the vertical direction. Furthermore, the first opening 41a is formed such that its upper end is shifted downward from the upper end of the first ventilation hole 40, and its lower end is shifted downward from the lower end of the first ventilation hole 40 by a predetermined second interval B. The two second openings 41b may be formed in positions that do not overlap with the central connection hole 24, through hole 27 or first ventilation hole 40 of the core 1 in the left-to-right direction.

[0046] Furthermore, the second opening 41b is formed with a diameter slightly shorter than the vertical length of the first opening 41a, leaving a third gap C of at least a first gap A from the upper wall of the first opening 41a, and a second gap B from the lower wall of the first opening 41a. As a result, the upper end of the second opening 41b is formed so that in the vertical direction, it is below the upper end of the central connection hole 24 and through hole 27 of the core 1, and when viewed from the stacking direction, it does not overlap with the central connection hole 24 and through hole 27 of the core 1, nor with the central circuit 33.

[0047] Furthermore, the second opening 41b is formed such that its lower end is at the same position as the lower end of the first ventilation hole 40 in the vertical direction. As a result, the second ventilation hole 41 has a water accumulation area 43 below the first ventilation hole 40, surrounded by the left and right walls of the second ventilation hole 41 that constitute the first opening 41a and the rear surface of the first flange 2. The water accumulation area 43 has a depth of the second gap B between the lower wall of the second ventilation hole 41 that constitutes the first opening 41a and the lower end of the second opening 41b.

[0048] In the heat exchanger 100 described above, the central circuit 33, consisting of the central connection hole 24 of the top plate 11, the through holes 27 of the multiple cup plates 10, and the central connection hole 24 of the bottom plate 12, is open to the atmosphere through the first ventilation hole 40 of the first flange 2 and the second ventilation hole 41 of the second flange 3. As a result, the gas generated when the top plate 11, the multiple cup plates 10, and the bottom plate 12 are brazed together is discharged through the first ventilation hole 40 and the second ventilation hole 41.

[0049] In the heat exchanger 100, the first fluid introduced through the first introduction pipe 4 and the first fluid introduction hole 20 flows from the first fluid introduction hole 20 to the upstream first fluid flow path 30 formed by the first communication holes 25 of the multiple cup plates 10. The first fluid also flows from the upstream first fluid flow path 30 to the planar first fluid flow path 32 formed in each cup plate 10, and from the planar first fluid flow path 32 to the downstream first fluid flow path 30 consisting of the first communication holes 26 formed by the multiple cup plates 10. The first fluid also flows from the downstream first fluid flow path 30 to the first fluid discharge hole 21 and is discharged through the first fluid discharge hole 21 and the first discharge pipe 5.

[0050] Furthermore, the heat exchanger 100 is configured such that, when viewed from the outside on the rear surface of the core 1 (i.e., the rear surface of the second flange 3), the central connection hole 24 of the top plate 11, the through holes 27 of the multiple cup plates 10, and the central connection hole 24 of the bottom plate 12 (i.e., the central circuit 33) inside the core 1 cannot be seen through the second opening 41b of the second ventilation hole 41 of the second flange 3. Therefore, even if the second ventilation hole 41 of the second flange 3 is connected to the central connection hole 24 of the top plate 11, the through holes 27 of the multiple cup plates 10, and the central connection hole 24 of the bottom plate 12 (central circuit 33) via the first ventilation hole 40 of the first flange 2, it is possible to suppress the intrusion of liquids such as water into the inside of the core 1 when liquids such as water are poured onto the rear surface of the core 1 (i.e., the rear surface of the second flange 3) from the outside.

[0051] Furthermore, when viewing the inside of the core 1 from the second opening 41b of the second ventilation hole 41 of the second flange 3, a water reservoir area 43 is formed in the second ventilation hole 41 below the first ventilation hole 40 of the first flange 2. Therefore, even if water is poured onto the second flange 3 from the outside, the water is collected in the water reservoir area 43 and separated from it by the first flange 2 and the bottom plate 12, thus preventing it from entering the central circuit 33. This allows the corrosion resistance of the top plate 11, the multiple cup plates 10, and the bottom plate 12 to be maintained.

[0052] The heat exchanger 100 according to the embodiment described above is a heat exchanger 100 in which a plurality of cup plates 10 having through holes 27 in the center are stacked, and a first fluid channel 30 and a second fluid channel are alternately formed between each cup plate 10, and a first fluid which is a heat exchange medium that is corrosive to metal is circulated in the first fluid channel 30, and a second fluid which undergoes heat exchange with the first fluid is circulated in the second fluid channel. In the heat exchanger 100, the central circuit 33 consisting of the through holes 27 of the plurality of cup plates 10 is not in communication with the first fluid channel 30 and the second fluid channel, but is in communication with the outside, and includes a first flange 2 attached to one end side in the stacking direction of the plurality of cup plates 10, and a second flange 3 attached to the first flange 2 on the opposite side from the cup plates 10. The first flange 2 has a first ventilation hole 40 that partially overlaps with the through hole 27 when viewed from the stacking direction, and the second flange 3 has a second ventilation hole 41 formed through a first opening 41a that is positioned on the first flange 2 side so as to partially overlap with the first ventilation hole 40 when viewed from the stacking direction, and a second opening 41b that is positioned on the opposite side from the first flange 2 so as not to overlap with the through hole 27 when viewed from the stacking direction.

[0053] With the above configuration, according to this embodiment, in the stacked heat exchanger 100, the central circuit 33, which consists of through holes 27 in a plurality of cup plates 10, is open to the atmosphere through the first ventilation hole 40 of the first flange 2 and the second ventilation hole 41 of the second flange 3. As a result, the gas generated when the plurality of cup plates 10 are brazed together is discharged through the first ventilation hole 40 and the second ventilation hole 41.

[0054] Furthermore, in the stacked heat exchanger 100, the through holes 27 of the multiple cup plates 10 are not visible from the second opening 41b of the second ventilation hole 41 of the second flange 3. Therefore, even if the second ventilation hole 41 of the second flange 3 communicates with the through holes 27 of the multiple cup plates 10 via the first ventilation hole 40 of the first flange 2, it is possible to suppress the intrusion of liquids such as water into the through holes 27 inside the core 1 when liquids such as water are poured onto the rear surface of the second flange 3 from the outside. This makes it possible to maintain the corrosion resistance of the top plate 11, the multiple cup plates 10, and the bottom plate 12.

[0055] Furthermore, in the heat exchanger 100 according to this embodiment, the first flange 2 is formed to have a first thickness that is thicker than the cup plate 10, and the second flange 3 is formed to have a second thickness that is thicker than the cup plate 10.

[0056] As a result, even if a small amount of liquid such as water enters through the second vent hole 41 of the second flange 3 and accumulates in the second vent hole 41 of the second flange 3 or the first vent hole 40 of the first flange 2, sufficient corrosion resistance can be ensured because the first flange 2 and the second flange 3 have increased plate thickness.

[0057] Furthermore, in the heat exchanger 100 according to this embodiment, the multiple cup plates 10 are stacked in the longitudinal direction of the vehicle to which the heat exchanger 100 is attached, the first flange 2 has a first ventilation hole 40 whose center is offset downward from the center of the through hole 27, and the second flange 3 has an upper end positioned offset downward from the upper end of the first ventilation hole 40 and has two second openings 41b provided offset to the left and right of the first ventilation hole 40.

[0058] As a result, even if a small amount of liquid such as water enters through the second vent hole 41 of the second flange 3 and accumulates in the second vent hole 41 of the second flange 3 or the first vent hole 40 of the first flange 2, the centrifugal force generated by the rotational motion of the vehicle on which the heat exchanger 100 is mounted can discharge the accumulated liquid to the outside through the second vent hole 41. Therefore, it is not necessary to construct the cup plate 10 with consideration for external corrosion resistance, and the thickness of the cup plate 10 can be reduced.

[0059] The above-described embodiments of the present invention represent only one aspect of the heat exchanger according to the present invention, and the technical scope of the present invention is not limited to the above-described embodiments. The present invention may be modified, substituted, or transformed in various ways without departing from the spirit of the technical idea, and the claims include all embodiments that may fall within the scope of the technical idea. [Explanation of Symbols]

[0060] 1 core 10 Cup Plates 10a First Cup Plate 10b Second Cup Plate 1 core 2. First flange 3. Second flange 10 Cup Plates 11 Top Plate 11a Rear part 11b Front member 12 Bottom Plate 20 1st fluid introduction hole 21 1st fluid discharge hole 24 Central connection holes 25, 26 1st communication hole 27 Through hole 30, 31, 32 First fluid channel 33 Central circuit 40 First ventilation hole 41. Second ventilation hole 41a 1st opening 41b 2nd opening 43 Puddle Area 100 heat exchanger

Claims

1. A heat exchanger (100) is provided, comprising a plurality of cup plates (10) having a through hole (27) in the center, with first fluid channels (30) and second fluid channels alternately formed between each cup plate (10), a first fluid which is a heat exchange medium corrosive to metals flowing through the first fluid channel (30), and a second fluid which undergoes heat exchange with the first fluid flowing through the second fluid channel, The central circuit (33), consisting of the through holes (27) of the plurality of cup plates (10), communicates with the outside without communicating with the first fluid passage (30) and the second fluid passage, and is attached to one end of the plurality of cup plates (10) in the stacking direction, The cup plate (10) is opposed to a second flange (3) which is attached to the first flange (2), and the second flange (3) is attached to the first flange (2) on the opposite side. The first flange (2) has a first ventilation hole (40) that partially overlaps with the through hole (27) when viewed from the stacking direction, The heat exchanger (100) is characterized in that the second flange (3) has a second ventilation hole (41) formed through a first opening (41a) which is positioned on the first flange (2) side and partially overlaps with the first ventilation hole (40) when viewed from the stacking direction, and a second opening (41b) which is positioned on the opposite side of the first flange (2) and does not overlap with the through hole (27) when viewed from the stacking direction.

2. The first flange (2) is formed to have a first thickness that is thicker than the cup plate (10), The heat exchanger (100) according to claim 1, characterized in that the second flange (3) is formed to have a second thickness that is thicker than the cup plate (10).

3. The plurality of cup plates (10) are stacked in the front-rear direction of the vehicle to which the heat exchanger (100) is installed. The first flange (2) has the first ventilation hole (40) whose center is offset downward from the center of the through hole (27), The heat exchanger (100) according to claim 1, characterized in that the second flange (3) has an upper end positioned offset below the upper end of the first ventilation hole (40) and has two second openings (41b) provided offset to the left and right of the first ventilation hole (40).

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