heat exchange core

Abstract

The heat exchange core has a core formed in such a manner that a pair of adjacent flow paths are folded in an adjacent state, at least one of the pair of flow paths has a pair of flow path portions that are adjacent to each other in the folding direction of the flow paths without sandwiching the other flow path, and the core has an insulation layer between the pair of flow path portions.

Description

Technical Field

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

[0002] This application claims priority based on Japanese Patent Application No. 2020-031240, filed on February 27, 2020, the contents of which are incorporated herein by reference. Background Art

[0003] It is known that there is a plate-type heat exchange core in which, in a plate stack formed by stacking a plurality of plates, first fluid paths between the plates for allowing a first fluid to pass between the plates and second fluid paths between the plates for allowing a second fluid to pass between the plates are alternately arranged in the direction of the plate stacking (for example, refer to patent document 1).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 3936088 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] A heat exchange core having higher heat exchange efficiency than the plate-type heat exchange core disclosed in Patent Document 1 is sought.

[0009] At least one embodiment of the present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a heat exchange core capable of improving heat exchange efficiency.

[0010] Solutions to Problems

[0011] In order to achieve the above object, the heat exchange core of the present invention includes a core formed in such a manner that a pair of adjacent flow paths are folded in an adjacent state, wherein:

[0012] At least one of the pair of flow paths has a pair of flow path portions that are adjacent to each other in the folding direction of the flow path without sandwiching the other flow path.

[0013] The core has a heat insulating layer between the pair of flow path portions.

[0014] Effects of the Invention

[0015] According to the heat exchange core of the present invention, the thermal insulation layer provided between a pair of flow path portions can reduce heat loss caused by heat exchange between a fluid flowing in the upstream portion of the pair of flow path portions and a fluid flowing in the downstream portion (between the same fluids), thereby improving the heat exchange efficiency of the heat exchange core. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a longitudinal sectional view schematically showing the structure of a heat exchange core realized using AM technology.

[0017] Figure 2 This is a longitudinal sectional view schematically showing the structure of a heat exchange core according to one embodiment.

[0018] Figure 3 This is a longitudinal sectional view schematically showing the structure of a heat exchange core according to one embodiment.

[0019] Figure 4 yes Figure 2 The heat exchange core is shown in a cross-sectional view along line IV-IV.

[0020] Figure 5 This is an enlarged cross-sectional view of a main part schematically showing the structure of a heat insulating layer provided in a heat exchange core according to one embodiment.

[0021] Figure 6 This is an enlarged cross-sectional view of a main part schematically showing the structure of a heat insulating layer provided in a heat exchange core according to one embodiment.

[0022] Figure 7 This is a cross-sectional view schematically showing a heat insulating layer of a heat exchange core according to one embodiment.

[0023] Figure 8 This is a diagram showing the structure of a support portion of a heat exchange core according to one embodiment.

[0024] Figure 9A This is a diagram showing a first flow path and a second flow path according to one embodiment.

[0025] Figure 9B It is a diagram showing the first flow path and the second flow path according to another embodiment.

[0026] Figure 9C This is a diagram showing the first flow path and the second flow path according to still another embodiment. DETAILED DESCRIPTION

[0027] Several embodiments of heat exchange cores are described below with reference to the accompanying drawings. The dimensions, materials, shapes, and relative arrangements of the components described in the embodiments or illustrated in the drawings are not intended to limit the scope of the present invention and are merely illustrative examples. A heat exchange core is a component used alone or in combination with a heat exchanger, and performs heat exchange between a first fluid and a second fluid supplied to the heat exchange core.

[0028] Figure 1 This is a longitudinal sectional view schematically showing the structure of a heat exchange core realized using AM technology.

[0029] By applying AM (Additive Manufacturing) technology with high degree of shape freedom in the manufacture of heat exchange cores, it is possible to manufacture flow paths and structures that were previously impossible due to process constraints, and to realize efficient and compact heat exchange cores. Figure 1 As shown, a heat exchange core 11 can be realized in which a first flow path 121 and a second flow path 122 are formed in the following manner: the first flow path 121 through which the first fluid FL1 flows and the second flow path 122 through which the second fluid FL2 flows are adjacent to each other with a gap therebetween, and the first flow path 121 and the second flow path 122 are folded while being adjacent to each other with a gap therebetween. In this heat exchange core 11, the first flow path 121 and the second flow path 122 have a pair of flow path portions 1211 and 1212 (1221 and 1222) that are adjacent to each other in the folding direction of the flow paths without sandwiching the other flow path 122 (121). The pair of flow path portions 1211, 1212 (1221, 1222) are different portions (upstream and downstream portions) of the same flow path 121 (122) (e.g., the first flow path). The fluid flowing in the upstream portion 1211 (1221) is the same as the fluid flowing in the downstream portion 1212 (1222). The pair of flow path portions 1211, 1212 (1221, 1222) (the upstream and downstream portions of the same flow path) are adjacent to each other without sandwiching the other flow path 122 (121) (e.g., the second flow path). Therefore, heat loss occurs due to heat exchange between the fluid flowing in the upstream portion 1211 (1221) and the fluid flowing in the downstream portion 1212 (1222) (between the same fluids). This heat loss contributes to a decrease in the heat exchange efficiency of the heat exchange core 11.

[0030] Therefore, in the heat exchange core of the embodiment described below, the purpose is to improve the heat exchange efficiency.

[0031] Figure 2 This is a longitudinal sectional view conceptually showing the structure of a heat exchange core 1 according to one embodiment. Figure 3 This is a diagram schematically showing the structure of a heat exchange core 1 according to another embodiment. Figure 4 yes Figure 2 The IV-IV line cross-sectional view of the heat exchange core 1 also shows Figure 2 The heat exchange core 1 is shown in a cross-sectional view taken along line IV-IV.

[0032] like Figures 2 to 4As shown in the figure, the heat exchange core 1 of several embodiments is a heat exchange core that performs heat exchange between a first fluid FL1 and a second fluid FL2. The heat exchange core 1 includes a core 2. A pair of adjacent flow paths 21 and 22 are provided in the core 2. One of the pair of adjacent flow paths 21 and 22 is the first flow path 21, and the other is the second flow path 22. The first flow path 21 is a flow path for the first fluid FL1 to flow, and the second flow path 22 is a flow path for the second fluid FL2 to flow. The first fluid FL1 and the second fluid FL2 are fluids with a temperature difference, for example, the first fluid FL1 is a high-temperature fluid and the second fluid FL2 is a low-temperature fluid. The first fluid FL1 and the second fluid FL2 may be either gas or liquid, or one of the first fluid FL1 and the second fluid FL2 may be gas and the other may be liquid.

[0033] The first flow path 21 and the second flow path 22 are adjacent to each other with a gap between them, and are formed in a folded manner while being adjacent to each other with a gap between them. One end and the other end of the first flow path 21 open on the side surface 2a of the core 2, respectively forming the inlet 21a and outlet 21b of the first flow path 21. Furthermore, one end of the second flow path 22, adjacent to the inlet 21a of the first flow path 21, forms the outlet 22b of the second flow path 22, while the other end of the second flow path 22, adjacent to the outlet 21b of the first flow path 21, forms the inlet 22a of the second flow path 22. Consequently, the first fluid FL1 flowing in the first flow path 21 and the second fluid FL2 flowing in the second flow path 22 are in a countercurrent relationship, flowing opposite each other and offset from each other, allowing heat exchange between the first fluid FL1 and the second fluid FL2.

[0034] Furthermore, at least one of the first and second flow paths 21 (22) has a pair of flow path portions 211, 212 (221, 222) adjacent to each other in the folding direction of the flow path 21 (22) without sandwiching the other flow path 22 (21). Furthermore, a heat insulating layer 23 (24) is provided between the pair of flow path portions 211, 212 (221, 222) of the core 2.

[0035] The core 2 is formed with the first flow path 21 and the second flow path 22 in a manner such that the first flow path 21 and the second flow path 22 are adjacent to each other with a gap therebetween and are folded while being adjacent to each other with a gap therebetween, and a heat insulation layer is provided in a pair of flow path portions 211, 212 (221, 222) that are adjacent to each other without sandwiching the other flow path 22 (21), and the core 2 is realized by, for example, AM technology.

[0036] exist Figures 2 to 4 In the example shown, the core 2 is formed in the width direction ( Figure 2 as well as Figure 3 The y direction in the Figure 2 as well as Figure 3 z direction in the ) and depth direction ( Figure 4 In addition, the first flow path 21 and the second flow path 22 are formed so as to be short in the depth direction ( Figure 4 The first flow path 21 and the second flow path 22 having a wide width in the x direction (in the direction of the image) are adjacent to each other with a gap therebetween, and the first flow path 21 and the second flow path 22 are folded while being adjacent to each other with a gap therebetween.

[0037] In addition, Figures 2 to 4 In the example shown, both the first flow path 21 and the second flow path 22 have a folding direction (height direction ( Figure 2 as well as Figure 3 A pair of flow path portions 211, 212, 221, 222 are adjacent to each other without sandwiching the other flow path 22, 21 in the z direction (in the z direction). That is, the first flow path 21 has a folding direction (height direction ( Figure 2 as well as Figure 3 The second flow path 22 has a pair of adjacent portions 211 and 212 that do not sandwich the second flow path 22 in the z-direction (in FIG. 2 ), and the second flow path 22 has a pair of flow path portions 221 and 222 that are adjacent to each other in the folding direction of the flow path 22 without sandwiching the first flow path 21. Furthermore, in the core 2, heat insulating layers 23 and 24 are provided between a pair of flow path portions 211, 212, 221, 222 that are adjacent to each other without sandwiching the other flow path 22, 21 in both the first flow path 21 and the second flow path 22.

[0038] In the heat exchange core 1 of the above-mentioned several embodiments, the first fluid FL1 is supplied from the inlet 21a of the first flow path 21, and the second fluid FL2 is supplied from the inlet 22a of the second flow path 22, so that the first fluid FL1 and the second fluid FL2 are in a countercurrent relationship, and the first fluid FL1 and the second fluid FL2 flow in a relative and staggered manner to perform heat exchange between the first fluid FL1 and the second fluid FL2.

[0039] According to the heat exchange core 1 of the aforementioned embodiments, the heat insulating layers 23 and 24 provided between the pair of flow path portions 211, 212, 221, and 222 reduce heat loss caused by heat exchange between the fluid flowing in the upstream portions 211 and 221 of the pair of flow path portions 211, 212, 221, and 222 (between the same fluids). This improves the heat exchange efficiency of the heat exchange core 1.

[0040] like Figure 2As shown, in the heat exchange core 1A of one embodiment, the inlet 21a and outlet 21b of the first flow path 21 and the inlet 22a and outlet 22b of the second flow path 22 are provided on the same side surface 2a1 of the core 2A. Figure 3 As shown in FIG. 1 , in a heat exchange core 1B of another embodiment, the inlet 21a and outlet 21b of the first flow path 21 and the outlet 22b and inlet 22a of the second flow path 22 are arranged on opposite sides of the core 2B. Thus, in the heat exchange core 1A of one embodiment, the inlet 21a and outlet 21b of the first flow path 21 and the inlet 22a and outlet 21b of the second flow path 22 are arranged on the same side 2a1 of the core 2A, while in the heat exchange core 1B of another embodiment, the inlet 21a and outlet 21b of the first flow path 21 and the inlet 22a and outlet 22b of the second flow path 22 are arranged on opposite sides of the core 2B. Therefore, the heat exchange core 1A of one embodiment or the heat exchange core 1B of another embodiment can be selected according to conditions such as piping.

[0041] Figure 5 This is an enlarged cross-sectional view schematically showing a main portion of a heat-insulating layer 23 provided on the core 2 of a heat exchange core 1 according to one embodiment. Figure 6 This is an enlarged cross-sectional view schematically showing a main portion of a heat insulating layer 23 provided on a core 2 of a heat exchange core 1 according to another embodiment.

[0042] like Figure 5 as well as Figure 6 As shown, in the heat exchange core 1 of several embodiments, the heat insulating layer 23 is a gap 231. Figure 5 In the example shown, the gap 231A is closed, but it can also be Figure 6 As shown, at least a portion of the gap 231B is open. In addition, although air exists in the gaps 231A and 231B, the closed gap 231A may be filled with a gas other than air or may be a vacuum.

[0043] According to the heat exchange core 1 of the above-described embodiment, the gap 231 provided between a pair of adjacent flow path portions 211, 212, 221, 222, without sandwiching the other flow path, reduces heat loss caused by heat exchange between the fluid flowing in the upstream portions 211, 221 of the pair of flow path portions 211, 212, 221, 222 and the fluid flowing in the downstream portions 212, 222 (between the same fluids). This can suppress a decrease in the heat exchange efficiency of the heat exchange core 1. It should be noted that when air is present within the gap 231, the gap 231 forms an air layer. Heat transfer occurs within the air layer due to air convection. However, heat transfer due to air convection within the air layer is less effective than heat conduction through metal parts. Therefore, heat transfer between the fluid flowing in the upstream portions 211, 221 of the pair of flow path portions 211, 212, 221, 222 and the fluid flowing in the downstream portions 212, 222 (between the same fluids) is suppressed. Therefore, if an air layer is provided between the pair of flow path portions 211 , 212 , 221 , and 222 , a heat insulating effect is exhibited.

[0044] Figure 7 This is a cross-sectional view schematically showing the heat insulating layer 23 of the heat exchange core 1 according to one embodiment.

[0045] like Figure 7 As shown, the heat insulating layer 23 of the heat exchange core 1 of one embodiment is a void 231, and has a support portion 232 at at least the end portion of the void 231 for supporting the void 231. The support portion 232 only needs to be provided at at least the end portion of the void 231, and can be provided only at the end portion of the void 231 or throughout the entire range of the void 231. In addition, it can be provided at a predetermined interval (which can be equal or unequal) in the void 231.

[0046] According to the heat insulating layer 23 of the heat exchange core 1 of the embodiment described above, the support portions 232 support the voids 231 at least at the ends of the voids. Therefore, even if the voids exist in the core 2, a decrease in the strength of the core 2 can be suppressed.

[0047] Figure 8 This is a diagram showing the structure of the support column 232 of the heat exchange core 1 according to one embodiment.

[0048] However, when the support portion 232 exists in the gap 231 as described above, heat conduction occurs in the support portion 232 , so the amount of heat transferred increases compared to when the gap 231 is filled only with air, and the heat insulation effect of the gap 231 decreases.

[0049] So, if Figure 8As shown, the support portion 232 of the heat exchange core 1 of one embodiment has a wire mesh-like three-dimensional lattice structure. The wire mesh-like three-dimensional lattice structure is a structure in which three-dimensional lattices are interconnected, and is therefore also called a lattice structure.

[0050] The wire mesh-like three-dimensional lattice structure may be repeated periodically or aperiodically. The wire mesh-like three-dimensional lattice structure is made of the same material as the metal or resin constituting the core 2 using AM technology, for example.

[0051] In addition, as described above, the support portion 232 only needs to be provided at at least the end portion of the gap 231. It can be provided only at the end portion of the gap 231, or it can be provided within the entire range of the gap 231. In addition, it can be provided at a prescribed interval in the gap 231. Therefore, the support portion 232 with a wire mesh-like three-dimensional lattice structure can be provided only at the end portion of the gap 231, or it can be provided within the entire range of the gap 231. In addition, the support portion 232 with a wire mesh-like three-dimensional lattice structure can be provided at a prescribed interval in the gap 231.

[0052] In addition, by providing a support portion 232 having a wire mesh-like three-dimensional lattice structure in the gap 231, although heat conduction occurs through the wire between the upstream side portions 211, 221 and the downstream side portions 212, 222 of a pair of flow path portions 211, 212, 221, 222 that are adjacent to each other without sandwiching the flow path on the other side, the amount of heat conducted between the upstream side portions 211, 221 and the downstream side portions 212, 222 of a pair of flow path portions 211, 212, 221, 222 that are adjacent to each other without sandwiching the flow path on the other side can be reduced by reducing the cross-sectional area of ​​the wires constituting the wire mesh-like three-dimensional lattice structure and increasing the length.

[0053] In addition, although a temperature difference occurs between the upstream side portions 211, 221 and the downstream side portions 212, 222 of a pair of adjacent flow path portions 211, 212, 221, 222 without sandwiching the other flow path, thereby generating air convection in the gap 231, the effect of suppressing convection can also be expected through the wire mesh-like three-dimensional lattice structure.

[0054] According to the support portion 232 of the heat exchange core 1 of the embodiment described above, the support portion 232 can suppress heat conduction and suppress a decrease in the strength of the cores 2A and 2B.

[0055] like Figure 4As shown, in some embodiments, the heat exchange core 1 includes partitions 214, 224 (porous) on at least one of the first flow path 21 and the second flow path 22 to divide the first flow path 21 and the second flow path 22 into a plurality of divided flow paths 213, 223. For example, the heat exchange core 1 includes partitions 214, 224 on both the first flow path 21 and the second flow path 22 to divide the first flow path 21 and the second flow path 22 into a plurality of divided flow paths 213, 223. For example, the number of partitions 214, 224 is the same in the first flow path 21 and the second flow path 22, and the number of divided flow paths 213 provided in the first flow path 21 is the same as the number of divided flow paths 223 provided in the second flow path 22.

[0056] According to the heat exchange core 1 of the aforementioned embodiments, the partition walls 214, 224 divide at least one of the first flow path 21 and the second flow path 22 into a plurality of divided flow paths 213, 223. As a result, the diameter of each flow path is reduced, thereby improving the heat transfer rate and enhancing the heat exchange efficiency. Furthermore, the flow velocity of the fluid flowing in the flow path (first flow path 21 or second flow path 22) divided into the divided flow paths 213, 223 is slowed, thereby improving the heat exchange performance.

[0057] As shown in FIG9 , in the heat exchange core 1 of several embodiments, at least one of the folded portions of a pair of flow paths has a curved portion. The folded portion of a pair of flow paths 21, 22 is the portion other than the portion where the pair of flow paths 21, 22 fold back. In the example shown in FIG9 , a portion of both the folded portion of the first flow path 21 and the folded portion of the second flow path 22 has a curved portion. The curved portion widely includes portions other than portions where the flow paths extend straight, for example, Figure 9A As shown in the parabolic shape, also includes Figure 9B In addition, it also includes the shape of a mountain bend. Figure 9C As shown, it has a rectangular and zigzag shape.

[0058] According to the heat exchange core 1 of the above-described embodiments, the flow path length is extended at a partially curved portion of at least one of the folded portions of the pair of flow paths 21 and 22, thereby increasing the heat exchange amount compared to a case where the flow paths are straight.

[0059] In addition, if Figure 2 as well as Figure 3 As shown, in the heat exchange core 1 in some embodiments, the folded portion of the pair of flow paths 21 and 22 is formed by combining portions that are straight lines when viewed in a direction perpendicular to the pair of flow paths 21 and 22 .

[0060] According to the heat exchange core 1 of the above-mentioned embodiments, the folded portions of a pair of flow paths 21 and 22 are formed by combining straight portions when viewed from a direction perpendicular to the pair of flow paths 21 and 22, thereby reducing pressure loss compared to a case where the flow paths have curved portions.

[0061] The present invention is not limited to the above-described embodiment, and includes forms obtained by adding modifications to the above-described embodiment and forms obtained by appropriately combining these forms.

[0062] For example, in the above-mentioned embodiment, the first fluid FL1 flowing in the first flow path 21 and the second fluid FL2 flowing in the second flow path 22 are in a countercurrent relationship, but the inlet 21a of the first flow path 21 and the inlet 22a of the second flow path 22 can also be set in such a manner that the first fluid FL1 and the second fluid FL2 are in a parallel flow relationship.

[0063] Furthermore, for example, at least one of the folded portions of the pair of flow paths may have a twisted portion. The twisted portion is a portion whose surface has a curved twisted shape, for example, a spirally twisted shape.

[0064] Furthermore, the structure in which a pair of adjacent passages are folded while adjacent to each other is not limited to structures that can be represented on the same cross section, but also includes structures that cannot be represented on the same cross section, for example, structures that are folded back in three-dimensional space.

[0065] The contents described in each of the above embodiments can be understood as follows, for example.

[0066] (1) A heat exchange core (1) of one embodiment includes a core (2) formed in such a manner that a pair of adjacent flow paths (21, 22) are folded in an adjacent state.

[0067] At least one of the pair of adjacent flow paths (21, 22) has a pair of flow path portions (211, 212 (221, 222)) that are adjacent to each other without sandwiching the other flow path (22 (21)) in the folding direction of the flow path (21 (22)).

[0068] The core (2) has a heat insulating layer (23) between the pair of flow path portions (211, 212).

[0069] According to such a structure, the heat insulating layer (23 (24)) provided between a pair of flow path portions (211, 212 (221, 222)) can reduce heat loss caused by heat exchange between a fluid flowing in an upstream portion (211 (221)) of the pair of flow path portions (211, 212 (221, 222)) and a fluid (first fluid (FL1) (second fluid (FL2))) flowing in a downstream portion (212 (222)) (between the same fluids). As a result, the heat exchange rate of the heat exchange core (1) can be improved.

[0070] (2) Another heat exchange core (1) is based on the heat exchange core described in (1).

[0071] A portion of at least one of the folded portions of the pair of flow paths has a bent portion.

[0072] According to such a configuration, the flow path length is increased at a partially bent portion of at least one of the pair of folded portions of the flow paths, and the amount of heat exchange can be increased compared to a case where the flow paths are straight.

[0073] (3) Another embodiment of the heat exchange core (1) is based on the heat exchange core described in (1).

[0074] The folded portion of the pair of flow paths is formed by a combination of portions that form straight lines when viewed from a direction orthogonal to the pair of flow paths.

[0075] According to this configuration, the folded portions of the pair of flow paths are formed by combining straight portions when viewed from a direction perpendicular to the pair of flow paths. This reduces pressure loss compared to a case where the flow paths have curved portions.

[0076] (4) Another embodiment of the heat exchange core (1) is the heat exchange core according to any one of (1) to (3),

[0077] The heat-insulating layer (23(24)) is a gap (231).

[0078] According to such a structure, the gap (231) provided between the pair of flow path portions (211, 212 (221, 222)) can reduce heat loss caused by heat exchange between the fluid (first fluid FL1 (second fluid FL2)) flowing in the upstream portion (211 (221)) of the pair of flow path portions and the fluid (first fluid FL1 (second fluid FL2)) flowing in the downstream portion (212 (222)) (between the same fluids). As a result, the heat exchange rate of the heat exchange core (1) can be improved.

[0079] (5) Another embodiment of the heat exchange core (1) is based on the heat exchange core described in (4).

[0080] The gap is closed.

[0081] According to such a structure, the space is closed, and thus the space can be made into a vacuum or filled with a gas.

[0082] (6) A heat exchange core (1) according to another embodiment is the heat exchange core according to any one of (1) to (4), wherein at least a portion of the heat insulating layer is open.

[0083] According to such a structure, the air in the heat insulating layer is replaced, thereby improving the heat insulating effect.

[0084] (7) Another embodiment of the heat exchange core (1) is based on the heat exchange core described in (4),

[0085] A support portion (232) for supporting the gap (231) is provided at at least one end portion of the gap (231).

[0086] According to such a structure, the support portion (232) supports at least the end portion of the gap (231), so even if the core (2) has the gap (231), it is possible to suppress a reduction in the strength of the core (2).

[0087] (8) Another embodiment of the heat exchange core (1) is based on the heat exchange core described in (7),

[0088] The support portion (232) has a three-dimensional lattice structure in the form of a wire mesh.

[0089] According to such a structure, the support portion (232) can suppress heat conduction and suppress a decrease in the strength of the core (2).

[0090] (9) A heat exchange core (1) according to another embodiment is the heat exchange core according to any one of (1) to (8),

[0091] At least one of the first flow path (21) and the second flow path (22) has a partition wall (214 (224)) that divides the first flow path (21) and the second flow path (22) into a plurality of divided flow paths (213 (223)).

[0092] According to such a structure, the flow velocity of the fluid flowing in the divided flow path (213(224)) can be slowed down, thereby improving the heat exchange performance.

[0093] Description of Reference Numerals

[0094] 1, 1A, 1B heat exchange core

[0095] 2, 2A, 2B core

[0096] 2a, 2a1, 2a2 side

[0097] 21 First flow

[0098] Entrance 21a

[0099] Exit 21b

[0100] 211 Flow path (upstream part)

[0101] 212 Flow path part (downstream part)

[0102] 213 Divide the flow path

[0103] 214 Next Door

[0104] 22 Second flow path

[0105] Entrance 22a

[0106] Exit 22b

[0107] 221 Flow path part (upstream part)

[0108] 222 Flow path part (downstream part)

[0109] 223 Split flow path

[0110] 224 Next Door

[0111] 23 Insulation

[0112] 231, 231A, 231B gap

[0113] 232 Pillar Department

[0114] 24 Insulation

[0115] 241 Gap

[0116] FL1 First Fluid

[0117] FL2 Second fluid.

Claims

1. A heat exchange core, wherein: The heat exchange core includes a core formed in such a manner that a pair of adjacent flow paths are folded in an adjacent state. At least one of the pair of adjacent flow paths has a pair of flow path portions that are adjacent to each other in the folding direction of the flow paths without sandwiching the other flow path. The core has a heat insulating layer between the pair of flow path portions, The folded portion of the pair of flow paths is formed by a combination of portions that are straight lines when viewed from a direction perpendicular to the pair of flow paths. The thermal insulation layer is a gap, A support portion for supporting the gap is provided at at least one end portion of the gap. The support column is made of the same metal or resin material as the core.

2. The heat exchange core according to claim 1, wherein: A portion of at least one of the folded portions of the pair of flow paths has a bent portion.

3. The heat exchange core according to claim 1 or 2, wherein: The gap is closed.

4. The heat exchange core according to claim 1 or 2, wherein: At least a portion of the thermal insulation layer is open.

5. The heat exchange core according to claim 1 or 2, wherein: The support portion has a three-dimensional lattice structure in the form of a wire mesh.

6. The heat exchange core according to claim 1 or 2, wherein: At least one of the pair of adjacent flow paths has a partition wall that divides the pair into a plurality of divided flow paths.

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