Heat exchange core

Abstract

The heat exchange core includes: a first flow path row formed by a plurality of first flow paths; a plurality of first partition walls that separate the plurality of first flow paths from each other; a second flow path row disposed beside the first flow path row and formed by a plurality of second flow paths; a plurality of second partition walls that separate the plurality of second flow paths from each other; and a partition wall located between the first flow path row and the second flow path row and separating the plurality of first flow paths from the plurality of second flow paths, where (a) the sectional coefficient of the partition wall related to the orthogonal direction is larger than that of either the first partition wall or the second partition wall related to the orthogonal direction, or (b) the constituent material of the partition wall has a fracture strength larger than that of either the first partition wall or the second partition wall.

Description

Technical Field

[0001] The present invention relates to a heat exchange core.

[0002] This application claims priority based on Japanese Patent Application No. 2020-031627 filed with the Japan Patent Office on February 27, 2020, and incorporates its content herein by reference. Background Art

[0003] Patent Document 1 discloses a heat exchanger using aluminum-extruded flat porous tubes. In this heat exchanger, the inner partition wall portions located at both ends in the long side direction of the flat shape, among the inner partition wall portions existing between adjacent flow paths of a plurality of flow paths, are thicker than the other inner partition wall portions respectively.

[0004] Prior Art Documents

[0005] Patent Documents

[0006] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2017-36906 Summary of the Invention

[0007] Problems to be Solved by the Invention

[0008] However, in a heat exchanger, when there are large temperature fluctuations in the heat exchanger, stress caused by constrained thermal expansion is generated, and there is a possibility of damaging the partition wall that separates a plurality of first flow paths from a plurality of second flow paths.

[0009] At least one embodiment of the present invention has been completed in view of the above circumstances, and an object thereof is to provide a heat exchange core capable of reducing the risk of damage to the partition wall that separates a plurality of first flow paths from a plurality of second flow paths.

[0010] Means for Solving the Problems

[0011] To achieve the above object, the heat exchange core of the present invention includes:

[0012] A first flow path row formed by a plurality of first flow paths arranged along a reference plane;

[0013] A plurality of first partition walls provided so as to cross the reference plane and separating the plurality of first flow paths from each other;

[0014] A second flow path row disposed beside the first flow path row in a direction orthogonal to the reference plane and formed by a plurality of second flow paths arranged along the reference plane;

[0015] A plurality of second partition walls provided so as to cross the reference plane and separating the plurality of second flow paths from each other; and

[0016] A partition wall, which is located between the first flow path row and the second flow path row in the orthogonal direction to the reference plane and separates the plurality of first flow paths from the plurality of second flow paths,

[0017] (a) The sectional coefficient of the partition wall related to the orthogonal direction is larger than that of either the first partition wall or the second partition wall related to the orthogonal direction,

[0018] or

[0019] (b) The constituent material of the partition wall has a fracture strength larger than that of either the first partition wall or the second partition wall.

[0020] Advantages of the Invention

[0021] According to the heat exchange core of the present invention, (a) the sectional coefficient of the partition wall related to the orthogonal direction to the reference plane is larger than that of either the first partition wall or the second partition wall related to the orthogonal direction to the reference plane, so that the stress generated in the partition wall is smaller than the stress generated in either the first partition wall or the second partition wall, and either the first partition wall or the second partition wall is preferentially damaged compared with the partition wall. Thus, the stress generated in the partition wall is released, and the damage risk of the partition wall is reduced (the damage risk of the partition wall can be reduced). In addition, (b) the constituent material of the partition wall has a fracture strength larger than that of either the first partition wall or the second partition wall, so that either the first partition wall or the second partition wall is preferentially damaged compared with the partition wall. Thus, the stress generated in the partition wall is released, and the damage risk of the partition wall is reduced (the damage risk of the partition wall can be reduced). Brief Description of the Drawings

[0022] Figure 1 is a view schematically showing a heat exchange core of at least one embodiment of the present invention.

[0023] Figure 2 is Figure 1 a cross-sectional view taken along line II-II of the heat exchange core shown.

[0024] Figure 3 is Figure 1 a cross-sectional view taken along line III-III of the heat exchange core shown.

[0025] Figure 4 is Figure 1 a cross-sectional view taken along line IV-IV of the heat exchange core shown.

[0026] Figure 5 is Figure 1 a cross-sectional view taken along line V-V of the heat exchange core shown.

[0027] Figure 6 is a view showing Figure 3An enlarged view of the flow path cross section of the heat exchange core shown.

[0028] Figure 7 It is a diagram for explaining a method of considering the rigidity against bending caused by thermal elongation.

[0029] Figure 8 It is a diagram showing the crack initiation portions of the first partition wall or the second partition wall. Detailed Description of the Invention

[0030] Hereinafter, the heat exchange core 1 of the embodiment of the present invention will be described with reference to the accompanying drawings. Note that the dimensions, materials, shapes, relative arrangements, etc. of the constituent elements described as embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, but are merely illustrative examples.

[0031] [Heat Exchange Core 1]

[0032] The heat exchange core 1 of the embodiment of the present invention is an element that is used alone or assembled in a heat exchanger, and heat exchange is performed between a first fluid and a second fluid supplied to the heat exchange core 1. The first fluid and the second fluid supplied to the heat exchange core 1 can each be either a liquid or a gas, and usually, their temperatures are different. As Figure 1 shown, for example, the heat exchange core 1 can be formed in a rectangular parallelepiped shape, but is not limited thereto.

[0033] As Figure 2 and Figure 3 shown, the heat exchange core 1 of the embodiment of the present invention includes a first flow path row 2, a plurality of first partition walls 3, a second flow path row 4, a plurality of second partition walls 5, and a partition wall 6.

[0034] As Figure 3 shown, the first flow path row 2 is formed by a plurality of first flow paths 21 arranged along a reference plane RP. For example, there are a plurality of first flow path rows 2. For example, in the case where the heat exchange core 1 is in a rectangular parallelepiped shape as Figure 1 shown, the reference plane RP is set along the long side direction of the rectangular parallelepiped, and the plurality of first flow path rows 2 are set parallel to the reference plane RP.

[0035] As Figure 4 shown, the plurality of first partition walls 3 are provided so as to intersect the reference plane RP, and separate the plurality of first flow paths 21 from each other. For example, the plurality of first partition walls 3 are arranged parallel to each other and at equal intervals, and arrange the plurality of first flow paths 21 parallel to each other and at equal intervals.

[0036] As Figure 3As shown, the second flow path column 4 is disposed beside the first flow path column 2 in the direction orthogonal to the reference plane RP, and is formed by a plurality of second flow paths 41 arranged along the reference plane RP. For example, there are a plurality of second flow path columns 4. For example, when the heat exchange core 1 is in the shape of a rectangular parallelepiped as shown in Figure 1 the plurality of second flow path columns 4 are alternately arranged with the plurality of first flow path columns 2 in the direction orthogonal to the reference plane RP (Y direction in Figure 3 ).

[0037] As Figure 5 shown, a plurality of second partition walls 5 are provided so as to cross the reference plane RP and separate the plurality of second flow paths 41 from each other. For example, the plurality of second partition walls 5 are parallel to each other and are provided at the same interval as the first partition wall 3, and the plurality of second flow paths 41 are arranged in parallel at the same interval as the first flow path 21, but are not limited thereto.

[0038] As Figure 3 shown, the partition 6 is located between the first flow path column 2 and the second flow column in the direction orthogonal to the reference plane RP and separates the plurality of first flow paths 21 from the plurality of second flow paths 41. For example, there are a plurality of partitions 6. For example, when the heat exchange core 1 is in the shape of a rectangular parallelepiped as shown in Figure 1 the plurality of partitions 6 are arranged in parallel and at equal intervals in the direction orthogonal to the reference plane RP (Y direction in Figure 3 ).

[0039] As Figure 4 and Figure 5 shown, when the plurality of first flow path columns 2 are each formed by a plurality of first flow paths 21 and the plurality of second flow path columns 4 are each formed by a plurality of second flow paths 41, intermediate flow paths are provided at one end and the other end of each of the plurality of first flow path columns 2 and at one end and the other end of each of the plurality of second flow path columns 4. As Figure 4 shown, the intermediate flow path 61 (hereinafter referred to as "first intermediate flow path 61") provided at one end (upper end) of each of the plurality of first flow path columns 2 communicates with one end of the first flow path 21 in the extending direction of the first flow path 21 and the plurality of first flow paths 21. As Figure 5As shown, the intermediate flow paths 62 (hereinafter referred to as "second intermediate flow paths 62") provided at one end (upper end) of each of the plurality of second flow path columns 4 communicate with the plurality of second flow paths 41 at one end of the second flow path 41 in the extending direction of the second flow path 41. Although not shown, the intermediate flow paths (hereinafter referred to as "third intermediate flow paths") provided at the other end (lower end) of each of the plurality of first flow path columns 2 communicate with the plurality of first flow paths 21 at the other end of the first flow path 21 in the extending direction of the first flow path 21. The intermediate flow paths (hereinafter referred to as "fourth intermediate flow paths") provided at the other end (lower end) of each of the plurality of second flow path columns 4 communicate with the plurality of second flow paths 41 at the other end of the second flow path 41 in the extending direction of the second flow path 41.

[0040] As Figure 4 and Figure 5 shown, the plurality of first intermediate flow paths 61 communicate with the first header flow path 71 respectively, and the plurality of second intermediate flow paths 62 communicate with the second header flow path 72 respectively. In addition, the plurality of third intermediate flow paths communicate with the third header flow path 73 respectively, and the plurality of fourth intermediate flow paths communicate with the fourth header flow path 74 respectively.

[0041] As Figure 4 shown, the first header flow path 71 extends in a direction orthogonal to the extending direction of the plurality of first intermediate flow paths 61 at one end (upper end) of the plurality of first flow path columns 2, and communicates with the plurality of first flow paths 21 via the plurality of first intermediate flow paths 61. As Figure 5 shown, the second header flow path 72 extends in a direction orthogonal to the extending direction of the plurality of second intermediate flow paths 62 at one end (upper end) of the plurality of second flow path columns 4, and communicates with the plurality of second flow paths 41 via the plurality of second intermediate flow paths 62. Although not shown, the third header flow path 73 extends in a direction orthogonal to the extending direction of the plurality of third intermediate flow paths at the other end (lower end) of the plurality of first flow path columns 2, and communicates with the plurality of first flow paths 21 via the plurality of third intermediate flow paths. The fourth header flow path 74 extends in a direction orthogonal to the extending direction of the plurality of fourth intermediate flow paths at the other end (lower end) of the plurality of second flow path columns 4, and communicates with the plurality of second flow paths 41 via the plurality of fourth intermediate flow paths.

[0042] As Figure 1As shown, when the heat exchange core 1 is in the shape of a rectangular parallelepiped, for example, the first header flow path 71, the second header flow path 72, the third header flow path 73, and the fourth header flow path 74 are located at the four corners on the same plane of the rectangular parallelepiped. In the heat exchange core 1 where the first fluid and the second fluid flow in opposite directions to each other (hereinafter referred to as "the convective heat exchange core 1"), the first header flow path 71 serves as the flow path for supplying the first fluid to the first flow path 21, and the second header flow path 72 serves as the flow path for discharging the second fluid from the first flow path 21. In addition, the third header flow path 73 serves as the flow path for discharging the first fluid from the first flow path 21, and the fourth header flow path 74 serves as the flow path for supplying the second fluid to the second flow path 41. It should be noted that in the heat exchange core 1 where the first fluid and the second fluid flow in the same direction (hereinafter referred to as "the co-current heat exchange core 1"), the second header flow path 72 serves as the flow path for supplying the second fluid to the second flow path 41, and the fourth header flow path 74 serves as the flow path for discharging the second fluid from the second flow path 41.

[0043] For example, the first header flow path 71, the second header flow path 72, the third header flow path 73, and the fourth header flow path 74 can be provided on the outside of the rectangular parallelepiped, but are not limited thereto. As Figure 1 shown, for example, when the first header flow path 71, the second header flow path 72, the third header flow path 73, and the fourth header flow path 74 are provided on the outside of the rectangular parallelepiped, the first header portion 11, the second header portion 12, the third header portion 13, and the fourth header portion 14 are respectively provided in a manner of protruding outward in the width direction of the rectangular parallelepiped. And the first header flow path 71, the second header flow path 72, the third header flow path 73, and the fourth header flow path 74 are respectively provided in the above-mentioned first header portion 11, second header portion 12, third header portion 13, and fourth header portion 14.

[0044] [Section coefficient related to the direction orthogonal to the reference plane RP]

[0045] As Figure 6 shown, the section coefficient of the partition wall 6 related to the direction orthogonal to the reference plane RP is larger than that of either the first partition wall 3 or the second partition wall 5 related to the direction orthogonal to the reference plane RP. For example, with respect to the section coefficient related to the direction orthogonal to the reference plane RP, it is the same in the first partition wall 3 and the second partition wall 5, but it can also be different.

[0046] [Mathematical formula 1]

[0047] In Figure 7 the rectangular cross-section shown, the moment of inertia I Z and the section coefficient Z of the cross-section can be expressed by the following mathematical formula.

[0048]

[0049]

[0050] For example, when the thickness b of the partition wall 6 is set to 3, the height h is set to 1, and the thicknesses b of the first partition wall 3 and the second partition wall 5 are set to 0.4 and the height h is set to 1, the section modulus of the partition wall 6 is 0.5, and the section modulus Z of the first partition wall 3 and the second partition wall 5 is 0.04. Also, the stress generated in the partition wall 6 and the stress generated in the first partition wall 3 or the second partition wall 5 are inversely proportional to the section modulus Z, and the stress generated in the partition wall 6 is smaller than the stress generated in the first partition wall 3 or the second partition wall 5. Thus, even when the same load is applied, the stress generated in the partition wall 6 is smaller than the stress generated in the first partition wall 3 or the second partition wall 5. Accordingly, the partition wall 6 is preferentially damaged compared to the first partition wall 3 or the second partition wall 5.

[0051] [Constituent materials]

[0052] The constituent material of the partition wall 6 has a greater fracture strength than the constituent material of either the first partition wall 3 or the second partition wall 5. For example, by setting either the first partition wall 3 or the second partition wall 5 to a constituent material with lower brittleness than the partition wall 6, the constituent material of the partition wall 6 has a greater fracture strength than the constituent material of either the first partition wall 3 or the second partition wall 5. Additionally, for example, it is also possible to set either the first partition wall 3 or the second partition wall 5 to a lattice structure (grid structure), such that the constituent material of the partition wall has a greater fracture strength than the constituent material of either the first partition wall 3 or the second partition wall 5. Further, for example, the constituent materials of the first partition wall 3 and the second partition wall 5 have the same fracture strength, but they may also have different fracture strengths.

[0053] According to the heat exchange core 1 of the above-described embodiment of the present invention, (a) the section modulus in the direction orthogonal to the reference plane RP of the partition wall 6 is larger than the section modulus in the direction orthogonal to the reference plane RP of either the first partition wall 3 or the second partition wall 5, such that the stress generated in the partition wall 6 is smaller than the stress generated in either the first partition wall 3 or the second partition wall 5, and either the first partition wall 3 or the second partition wall 5 is preferentially damaged compared to the partition wall 6. Accordingly, the stress generated in the partition wall 6 is released, and the risk of damage to the partition wall 6 is reduced (the risk of damage to the partition wall 6 can be reduced). Additionally, (b) the constituent material of the partition wall 6 has a greater fracture strength than the constituent material of either the first partition wall 3 or the second partition wall 5, such that either the first partition wall 3 or the second partition wall 5 is preferentially damaged compared to the partition wall 6. Accordingly, the stress generated in the partition wall 6 is released, and the risk of damage to the partition wall 6 is reduced (the risk of damage to the partition wall 6 can be reduced).

[0054] [Thickness of partition wall 6]

[0055] As Figure 6 shown, in the heat exchange core 1, the partition wall 6 has a wall thickness (hereinafter referred to as "wall thickness") that is larger than either the first partition wall 3 or the second partition wall 5. Here, the "wall thickness" refers to the wall thickness in the direction orthogonal to the extending direction of the first flow path 21. In Figure 6 , the wall thickness of the partition wall 6 is represented by t1, the wall thickness of the first partition wall 3 is represented by t2, and the wall thickness of the second partition wall is represented by t3. And when the wall thickness of the partition wall 6 is set as t1, the wall thickness of the first partition wall 3 is set as t2, and the wall thickness of the second partition wall 5 is set as t3, the wall thickness t1 of the partition wall 6 > the wall thickness t2 of the first partition wall 3 or the wall thickness t2 of the partition wall 6 > the wall thickness t3 of the second partition wall 5. It should be noted that the wall thickness t2 of the first partition wall 3 and the wall thickness t3 of the second partition wall 5 may be the same or different.

[0056] According to such a structure, by giving a difference to the wall thickness between the partition wall 6 and the first partition wall 3 or the second partition wall 5, the above-mentioned cross-sectional coefficient magnitude can be achieved. In addition, even when there is a pressure difference between the first fluid and the second fluid, since the wall thickness of the partition wall 6 is relatively large, the risk of damage to the partition wall 6 caused by the pressure difference can also be reduced.

[0057] [Crack initiation part 31(51)]

[0058] As Figure 8 shown, in the heat exchange core 1, either the first partition wall 3 or the second partition wall 5 has a crack initiation part 31(51). For example, the crack initiation part 31(51) is a crack, a hole, a notch, a slit, etc., and also includes a crack initiation part formed by combining them. For example, the first partition wall 3 has a crack initiation part 31 formed by combining a crack and a hole, and the second partition wall 5 has a crack initiation part 51 formed by a slit.

[0059] According to such a structure, compared with the cross-sectional coefficient of either the first partition wall 3 or the second partition wall 5 having the crack initiation part 31(51) in the direction orthogonal to the reference plane RP, the cross-sectional coefficient of the partition wall 6 in the direction orthogonal to the reference plane RP is larger. Thus, compared with the stress generated in either the first partition wall 3 or the second partition wall 5, the stress generated in the partition wall 6 is smaller, and either the first partition wall 3 or the second partition wall 5 is preferentially damaged compared with the partition wall 6. For example, by generating a crack from the crack initiation part 31 of the first partition wall 3 or the crack initiation part 51 of the second partition wall 5, either the first partition wall 3 or the second partition wall 5 is damaged prior to the partition wall 6.

[0060] [Connection of flow paths]

[0061] As Figure 8As shown, in the heat exchange core 1, a pair of adjacent first flow paths 21 or second flow paths 41 communicate with each other via a crack starting portion 31 (51).

[0062] According to such a structure, in a pair of adjacent first flow paths 21 or second flow paths 41, the fluid moves through the crack starting portion 31 (51), so that the pressure distribution can be equalized in the pair of adjacent first flow paths 21 or second flow paths 41.

[0063] The present invention is not limited to the above-described embodiments, and also includes embodiments obtained by deforming the above-described embodiments and embodiments obtained by appropriately combining these embodiments.

[0064] The content described in each of the above embodiments can be understood as follows, for example.

[0065] (1) The heat exchange core 1 of one aspect includes:

[0066] A first flow path row 2 formed by a plurality of first flow paths 21 arranged along a reference plane RP;

[0067] A plurality of first partition walls 3 provided in a manner intersecting with the reference plane RP and separating the plurality of first flow paths 21 from each other;

[0068] A second flow path row 4 disposed beside the first flow path row 2 in the direction orthogonal to the reference plane RP and formed by a plurality of second flow paths 41 arranged along the reference plane RP;

[0069] A plurality of second partition walls 5 provided in a manner intersecting with the reference plane RP and separating the plurality of second flow paths 41 from each other; and

[0070] A partition wall 6 located between the first flow path row 2 and the second flow path row 4 in the direction orthogonal to the reference plane RP and separating the plurality of first flow paths 21 from the plurality of second flow paths 41,

[0071] (a) The section coefficient (replaced with = section moment of inertia related to the orthogonal direction, and the magnitude relationship is the same) of the partition wall 6 related to the orthogonal direction is larger than that of either the first partition wall 3 or the second partition wall 5 related to the orthogonal direction,

[0072] or

[0073] (b) The constituent material of the partition wall 6 has a fracture strength larger than that of either the first partition wall 3 or the second partition wall 5.

[0074] According to the heat exchange core 1 of the present invention, (a) the sectional coefficient of the partition wall 6 in the direction orthogonal to the reference plane RP is larger than that of either the first partition wall 3 or the second partition wall 5 in the direction orthogonal to the reference plane RP. As a result, the stress generated in the partition wall 6 is smaller than the stress generated in either the first partition wall 3 or the second partition wall 5, and either the first partition wall 3 or the second partition wall 5 is preferentially damaged compared to the partition wall 6. Thus, the stress generated in the partition wall 6 is released, and the risk of damage to the partition wall 6 is reduced (the risk of damage to the partition wall 6 can be reduced). Additionally, (b) the constituent material of the partition wall 6 has a fracture strength larger than that of either the first partition wall 3 or the second partition wall 5. As a result, either the first partition wall 3 or the second partition wall 5 is preferentially damaged compared to the partition wall 6. Thus, the stress generated in the partition wall 6 is released, and the risk of damage to the partition wall 6 is reduced (the risk of damage to the partition wall 6 can be reduced).

[0075] (2) Based on the heat exchange core 1 described in (1), the heat exchange core 1 of another embodiment

[0076] The partition wall 6 has a thickness larger than that of either the first partition wall 3 or the second partition wall 5.

[0077] According to such a structure, by providing a difference in the wall thickness between the partition wall 6 and the partition wall (the first partition wall 3 or the second partition wall 5), the size relationship of the sectional coefficients in (1)(a) above can be achieved. Additionally, even when there is a pressure difference between the first fluid and the second fluid, since the wall thickness of the partition wall 6 is relatively large, the risk of damage to the partition wall 6 caused by the pressure difference can also be reduced.

[0078] (3) Based on the heat exchange core 1 described in (1) or (2), the heat exchange core 1 of yet another embodiment

[0079] Either the first partition wall 3 or the second partition wall 5 has a crack initiation portion 31(51).

[0080] For example, the crack initiation portion 31(51) is a crack, a hole, a notch, a slit, etc., and also includes a crack initiation portion formed by combining them.

[0081] According to such a structure, the sectional coefficient of the partition wall 6 in the direction orthogonal to the reference plane RP is larger than that of either the first partition wall 3 or the second partition wall 5 having the crack initiation portion 31(51) in the direction orthogonal to the reference plane RP. Thus, the stress generated in the partition wall 6 is smaller than the stress generated in either the first partition wall 3 or the second partition wall 5, and either the first partition wall 3 or the second partition wall 5 is preferentially damaged compared to the partition wall 6.

[0082] (4)In another solution, on the basis of the heat exchange core 1 described in (3),

[0083] A pair of adjacent first flow paths 21 or the second flow paths 41 communicate with each other via the crack starting portion 31 (51).

[0084] According to such a structure, in a pair of adjacent first flow paths 21 or second flow paths 41, the fluid moves through the crack starting portion, so that the pressure distribution can be equalized in the pair of adjacent first flow paths 21 or second flow paths 41.

[0085] Description of Reference Numerals

[0086] 1 Heat exchange core

[0087] 11 First header portion

[0088] 12 Second header portion

[0089] 13 Third header portion

[0090] 14 Fourth header portion

[0091] 2 First flow path row

[0092] 21 First flow path

[0093] 3 First dividing wall

[0094] 31 Crack starting portion

[0095] 4 Second flow path row

[0096] 41 Second flow path

[0097] 5 Second dividing wall

[0098] 51 Crack starting portion

[0099] 6 Partition wall

[0100] 61 First intermediate flow path

[0101] 62 Second intermediate flow path

[0102] 71 First header flow path

[0103] 72 Second header flow path

[0104] 73 Third header flow path

[0105] 74 Fourth header flow path

[0106] RP Reference plane.

Claims

1. A heat exchange core, wherein, the heat exchange core includes: a first flow path column formed by a plurality of first flow paths arranged along a reference plane; a plurality of first partition walls disposed in a manner crossing the reference plane and separating the plurality of first flow paths from each other; a second flow path column disposed beside the first flow path column in the direction orthogonal to the reference plane and formed by a plurality of second flow paths arranged along the reference plane; a plurality of second partition walls disposed in a manner crossing the reference plane and separating the plurality of second flow paths from each other; and a partition wall located between the first flow path column and the second flow path column in the direction orthogonal to the reference plane and separating the plurality of first flow paths from the plurality of second flow paths, wherein the constituent material of the partition wall has a fracture strength greater than that of the constituent material of either the first partition wall or the second partition wall.

2. The heat exchange core according to claim 1, wherein, the partition wall has a thickness greater than that of either the first partition wall or the second partition wall.

3. A heat exchange core, wherein, the heat exchange core includes: a first flow path column formed by a plurality of first flow paths arranged along a reference plane; a plurality of first partition walls disposed in a manner crossing the reference plane and separating the plurality of first flow paths from each other; a second flow path column disposed beside the first flow path column in the direction orthogonal to the reference plane and formed by a plurality of second flow paths arranged along the reference plane; a plurality of second partition walls disposed in a manner crossing the reference plane and separating the plurality of second flow paths from each other; and a partition wall located between the first flow path column and the second flow path column in the direction orthogonal to the reference plane and separating the plurality of first flow paths from the plurality of second flow paths, wherein (a) the section modulus of the partition wall related to the orthogonal direction is greater than that of either the first partition wall or the second partition wall related to the orthogonal direction, or (b) the constituent material of the partition wall has a fracture strength greater than that of the constituent material of either the first partition wall or the second partition wall, and either the first partition wall or the second partition wall has a crack initiation portion.

4. The heat exchange core according to claim 3, wherein, a pair of adjacent first flow paths or second flow paths communicate with each other via the crack initiation portion.

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