Heat exchanger and manufacturing method thereof

Abstract

To provide a heat exchanger and its manufacturing method improved in heat exchange efficiency.SOLUTION: A heat exchanger 1 includes: a first flow channel 10 in which a first fluid flows; a second flow channel 20 which is in adjacent to the first flow channel 10 and in which a second fluid flows; and a housing 3 for housing the first flow channel 10 and the second flow channel 20. Inside of the housing 3, heat is exchanged between the first fluid flowing in the first flow channel 10 and the second fluid flowing in the second flow channel 20. Inside of the housing 3, the first flow channel 10 and the second flow channel 20 are partitioned by a partitioning wall 5 so that the flow channels independent from each other are formed, and the partitioning wall 5 has a three-dimensional curved surface shape.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a heat exchanger and a method for manufacturing the same. [Background technology]

[0002] Conventionally, heat exchangers using various heat transfer methods have been widely used as devices for transferring heat between two fluids of different temperatures. For example, Patent Document 1 proposes a surface-type (partition-wall-type) heat exchanger in which two fluids flow through two spaces separated by a partition wall, and heat exchange between the two fluids is performed by heat transfer through the partition wall or the like.

[0003] Meanwhile, in recent years, research and development has been actively conducted to contribute to energy efficiency so that more people can have access to affordable, reliable, sustainable, and advanced energy. To contribute to energy efficiency, there is a demand for improved heat exchange efficiency in heat exchangers. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5293077 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the heat exchanger of Patent Document 1, sufficient consideration has not been given to factors such as the turbulence of the heat-generating fluid (e.g., exhaust gas) and the refrigerant (e.g., cooling water), and the wall area where the heat-generating fluid and the refrigerant come into contact, so it is difficult to expect a significant improvement in heat exchange efficiency.

[0006] The present invention provides a heat exchanger with improved heat exchange efficiency and a method for manufacturing the same. [Means for solving the problem]

[0007] The present invention provides a first flow path through which a first fluid flows; a second flow path adjacent to the first flow path and through which a second fluid flows; a housing that accommodates the first flow path and the second flow path, A heat exchanger that performs heat exchange between the first fluid flowing through the first flow path and the second fluid flowing through the second flow path inside the housing, Within the housing, the first flow path and the second flow path are separated by a partition wall to form flow paths independent of each other, The partition wall is Gyroid structure Has a 3D curved shape death, the first flow path and the second flow path extend three-dimensionally; a first inlet for introducing the first fluid into the first flow path; a first outlet for discharging the first fluid that has flowed through the first flow path; a second inlet for introducing the second fluid into the second flow path; a second outlet port for discharging the second fluid that has flowed through the second flow path; Furthermore, The first inlet is provided at one end of the housing in a first direction, the first outlet is provided at the other end of the housing in the first direction, the second inlet is provided at the one end or the other end of the housing in the first direction, the second outlet is provided at an end of the housing opposite to the second inlet in the first direction, the first direction coincides with the flow direction of the first fluid and the second fluid, the gyroid structure is formed by a curved surface that is expressed by an approximate formula of sina·cosb+sinb·cosc+sinc·cosa=0 using trigonometric functions when coordinates in a Cartesian coordinate system of mutually orthogonal a-axis, b-axis, and c-axis are (a, b, c), The partition wall is formed by being rotated by a predetermined angle around the Y axis from a state in which the a-axis, the b-axis, and the c-axis of the gyroid structure coincide with the X axis, the Y axis, and the Z axis of a Cartesian coordinate system in which the first direction is the X axis, respectively, so that none of the a-axis, the b axis, and the c axis of the gyroid structure coincide with the first direction. .

[0008] The present invention also provides a first flow path through which a first fluid flows; a second flow path adjacent to the first flow path and through which a second fluid flows; a housing that accommodates the first flow path and the second flow path, Within the housing: a heat exchanger manufacturing method, wherein the first flow path and the second flow path are partitioned by a partition wall to form flow paths independent of each other, and heat exchange is performed between the first fluid flowing through the first flow path and the second fluid flowing through the second flow path, The first flow path and the second flow path extend three-dimensionally. Gyroid structure The partition wall, which has a three-dimensional curved surface, is formed by layering powdered material. death, The heat exchanger comprises: a first inlet for introducing the first fluid into the first flow path; a first outlet for discharging the first fluid that has flowed through the first flow path; a second inlet for introducing the second fluid into the second flow path; a second outlet port for discharging the second fluid that has flowed through the second flow path; Furthermore, The first inlet is provided at one end of the housing in a first direction, the first outlet is provided at the other end of the housing in the first direction, the second inlet is provided at the one end or the other end of the housing in the first direction, the second outlet is provided at an end of the housing opposite to the second inlet in the first direction, the first direction corresponds to a flow direction of the first fluid and the second fluid, the gyroid structure is formed by a curved surface that is expressed by an approximation formula of sina·cosb+sinb·cosc+sinc·cosa=0 using trigonometric functions when the coordinates in a Cartesian coordinate system of mutually orthogonal a-axis, b-axis, and c-axis are (a, b, c), The gyroid structure is rotated by a predetermined angle around the Y axis from a state in which the a-axis, the b-axis, and the c-axis of the gyroid structure coincide with the X axis, the Y axis, and the Z axis of a Cartesian coordinate system in which the first direction is the X axis, and by a predetermined angle around the X axis, so that none of the a-axis, the b-axis, and the c-axis of the gyroid structure coincide with the first direction, . [Effects of the Invention]

[0009] According to the present invention, the contact area between the first flow path and the second flow path can be increased, thereby improving the efficiency of heat exchange between the first fluid and the second fluid. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a heat exchanger according to an embodiment of the present invention; [Figure 2] 2A and 2B are diagrams showing a housing in the heat exchanger of FIG. 1, where (a) is a perspective view of the housing and (b) is a cross-sectional view of the housing. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of a heat exchanger of the present invention will be described with reference to the accompanying drawings. The drawings should be viewed in the direction indicated by the reference numerals.

[0012] 1, the heat exchanger 1 of this embodiment is a device for exchanging heat between a first fluid to be cooled and a second fluid, which is a refrigerant that cools the first fluid. The heat exchanger 1 is mounted on a device (such as a vehicle) equipped with an internal combustion engine.

[0013] As shown in Figure 1 and Figures 2(a) and 2(b), the heat exchanger 1 includes a first flow path 10 through which a first fluid flows, a second flow path 20 adjacent to the first flow path 10 through which a second fluid flows, and a housing 3 that accommodates the first flow path 10 and the second flow path 20. The heat exchanger 1 performs heat exchange within the housing 3 between the first fluid flowing through the first flow path 10 and the second fluid flowing through the second flow path 20. The first fluid is, for example, exhaust gas discharged from an internal combustion engine, and the second fluid is, for example, coolant or air as a refrigerant.

[0014] In this specification and the like, for the sake of simplicity and clarity of explanation, an XYZ Cartesian coordinate system is set to indicate directions relative to the heat exchanger 1. The XYZ Cartesian coordinate system includes an X axis along the longitudinal direction of the heat exchanger 1, a Y axis along the width direction of the heat exchanger 1, and a Z axis along the height direction, which is perpendicular to both the X and Y axes.

[0015] Inside the housing 3, the first flow path 10 and the second flow path 20 are separated by a partition wall 5 to form flow paths independent of each other. The partition wall 5 has a three-dimensional curved shape, and the first flow path 10 and the second flow path 20 extend three-dimensionally. With this configuration, the contact area between the first flow path 10 and the second flow path 20 inside the housing 3 can be increased, thereby improving the efficiency of heat exchange between the first fluid and the second fluid.

[0016] The three-dimensional curved shape of the partition wall 5 is achieved by, for example, a gyroid structure. The gyroid structure is formed by a curved surface expressed by the approximate formula sina·cosb+sinb·cosc+sinc·cosa=0 using trigonometric functions, where (a, b, c) are the coordinates in a Cartesian coordinate system of mutually orthogonal axes a, b, and c. When the partition wall 5 has a three-dimensional curved shape of a gyroid structure, the flows of the first fluid flowing through the first flow path 10 and the second fluid flowing through the second flow path 20 are easily stirred inside the housing 3. Therefore, turbulence is likely to occur when the flow velocities of the first fluid flowing through the first flow path 10 and the second fluid flowing through the second flow path 20 are high, thereby further improving the heat exchange efficiency between the first fluid and the second fluid.

[0017] 1, the heat exchanger 1 further includes a first inlet 11, a first outlet 12, a second inlet 21, and a second outlet 22. The first inlet 11 is provided at one end of the housing 3 in the X-axis direction, and introduces the first fluid from the outside into the first flow path 10. The first outlet 12 is provided at the other end of the housing 3 in the X-axis direction, and discharges the first fluid that has flowed through the first flow path 10 to the outside.

[0018] The second inlet 21 is provided at the other end of the housing 3 adjacent to the first outlet 12, and introduces the second fluid from the outside into the second flow path 20. The second outlet 22 is provided at the other end of the housing 3 adjacent to the first inlet 11, and discharges the second fluid that has flowed through the second flow path 20 to the outside.

[0019] As described above, in the heat exchanger 1 of this embodiment, the first inlet 11 for the first fluid and the second inlet 21 for the second fluid are arranged in opposite positions relative to the housing 3. Similarly, the first outlet 12 for the first fluid and the second outlet 22 for the second fluid are arranged in opposite positions relative to the housing 3. In other words, the flow directions of the first fluid and the second fluid are opposite at least inside the housing 3, forming a so-called counterflow, which further improves the heat exchange efficiency.

[0020] The arrows in FIG. 2(a) indicate the flow direction of the first fluid, and the flow direction of the second fluid is opposite to the arrow. FIG. 2(b) shows a cross section of the housing 3, and similar cross sections are periodically formed inside the housing 3. As shown in FIG. 2(b), in a predetermined cross section of the housing 3, which in this embodiment is perpendicular to the flow directions of the first and second fluids (i.e., the X-axis direction), first flow paths 10 through which the first fluid flows and second flow paths 20 through which the second fluid flows are alternately arranged in one direction, which in this embodiment is the vertical direction (the Z-axis direction). This further improves the heat exchange efficiency between the first and second fluids and makes it easy to form the first inlet 11 and the second outlet 22, and the first outlet 12 and the second inlet 21. In FIG. 2(b), the first fluid flows from the front side to the back side of the paper, and the second fluid flows from the back side to the front side of the paper.

[0021] In this embodiment, the partition wall 5 is formed so that none of the a-axis, b-axis, and c-axis of the gyroid structure coincides with the flow direction of the first fluid and the second fluid (that is, the X-axis direction).

[0022] For example, the gyroid structure of partition wall 5 has a shape that is rotated 45 degrees around the Y axis and 54.7 degrees around the X axis from a state in which the a-axis, b-axis, and c-axis of the gyroid structure are aligned with the X axis, Y axis, and Z axis of heat exchanger 1, respectively.

[0023] In this way, by rotating the Cartesian coordinate system of the gyroid structure by a predetermined angle around the X-axis and Y-axis of the housing 3 so that the a-axis, b-axis, and c-axis of the gyroid structure do not coincide with the flow direction of the fluid in the housing 3, linear spaces are less likely to be formed in the flow direction of the first and second fluids (i.e., the X-axis direction) in the first flow path 10 and the second flow path 20. This causes the fluids to flow in a three-dimensional undulating manner in the first flow path 10 and the second flow path 20, making it possible to effectively utilize the surface area of ​​the gyroid structure.

[0024] In this configuration, it is possible to increase the travel distance of the first fluid flowing through the first flow path 10 from the first inlet 11 to the first outlet 12 of the housing 3, and the travel distance of the second fluid flowing through the second flow path 20 from the second inlet 21 to the second outlet 22. This further improves the efficiency of heat exchange between the first fluid and the second fluid.

[0025] The housing 3 and the partition wall 5 are formed by additive manufacturing of powdered material using a known 3D printing technology. Additive manufacturing using 3D printing technology is a conventionally known molding technology in which powdered material is melted using an electron beam or fiber laser and then layer-solidified to form a mold. This method enables the molding of complex three-dimensional shapes and enables the creation of fine, dense 3D shapes. Therefore, by forming the partition wall 5 by additive manufacturing of powdered material, it is possible to form the partition wall 5 with a three-dimensional curved shape that is difficult to form using common processing methods such as cutting, forging, and punching, with high precision and at low cost. For example, the housing 3 and the partition wall 5 are formed by additive manufacturing of metal powder using a known 3D printing technology. The housing 3 and the partition wall 5 may also be formed by additive manufacturing of powdered resin using a known 3D printing technology, or by additive manufacturing of ceramic powder using a known 3D printing technology.

[0026] Although the drawing shows a large number of openings formed on the outer surface of the housing 3, the openings are closed during additive manufacturing.

[0027] Although one embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can conceive of various modifications or alterations within the scope of the claims, and it is understood that these also naturally fall within the technical scope of the present invention. Furthermore, the components of the above embodiment may be combined in any manner without departing from the spirit of the invention.

[0028] For example, in the heat exchanger 1 of this embodiment, the flow directions of the first fluid and the second fluid are countercurrent, at least inside the housing 3, but the heat exchanger 1 may also be parallel, at least inside the housing 3, in which the flow directions of the first fluid and the second fluid are the same.

[0029] This specification describes at least the following: In parentheses, components corresponding to those in the above-described embodiments are shown as examples, but the present invention is not limited to these.

[0030] (1) a first flow path (first flow path 10) through which a first fluid flows; a second flow path (second flow path 20) adjacent to the first flow path and through which a second fluid flows; a housing (housing 3) that accommodates the first flow path and the second flow path, A heat exchanger (heat exchanger 1) that performs heat exchange between the first fluid flowing through the first flow path and the second fluid flowing through the second flow path inside the housing, Within the housing, the first flow path and the second flow path are separated by a partition wall (partition wall 5) to form flow paths independent of each other, The partition wall has a three-dimensional curved surface shape, The heat exchanger, wherein the first flow path and the second flow path extend in three dimensions.

[0031] According to (1), the contact area between the first flow path and the second flow path can be increased inside the housing, thereby improving the efficiency of heat exchange between the first fluid and the second fluid.

[0032] (2) The heat exchanger according to (1), A heat exchanger, wherein the three-dimensional curved shape of the partition wall is a gyroid structure.

[0033] According to (2), the flow of the first fluid flowing through the first flow path and the flow of the second fluid flowing through the second flow path are easily agitated inside the housing. Therefore, when the flow velocities of the first fluid flowing through the first flow path and the second fluid flowing through the second flow path are high, turbulence is easily generated, and the efficiency of heat exchange between the first fluid and the second fluid is further improved.

[0034] (3) The heat exchanger according to (2), a first inlet (first inlet 11) for introducing the first fluid into the first flow path; a first outlet (first outlet 12) for discharging the first fluid that has flowed through the first flow path; a second inlet (second inlet 21) for introducing the second fluid into the second flow path; a second outlet (second outlet 22) for discharging the second fluid that has flowed through the second flow path, the first inlet is provided at one end of the housing in the first direction (X-axis direction), the first outlet is provided at the other end of the housing in the first direction, the first inlet is provided at the one end or the other end of the housing in the first direction, the first outlet is provided at an end of the housing opposite to the first inlet in the first direction, The gyroid structure is When the coordinates in the Cartesian coordinate system of the mutually perpendicular a-axis, b-axis, and c-axis are (a, b, c), it is composed of a curved surface that can be expressed using trigonometric functions as the approximate formula sina·cosb+sinb·cosc+sinc·cosa=0. The partition wall is formed so that none of the a-axis, the b-axis, and the c-axis of the gyroid structure coincides with the first direction.

[0035] According to (3), by forming the partition walls so that the a-axis, b-axis, and c-axis of the gyroid structure do not all coincide with the first direction, linear spaces are less likely to form in the first direction in the first fluid and second flow paths, which causes the fluids to flow in a three-dimensional undulating manner in the first fluid and second flow paths, making it possible to effectively utilize the surface area of ​​the gyroid structure.

[0036] (4) A heat exchanger according to any one of (1) to (3), A heat exchanger, wherein the first flow paths and the second flow paths are arranged alternately in one direction in a predetermined cross section of the housing.

[0037] According to (4), the heat exchange efficiency between the first fluid and the second fluid is further improved, and the first inlet and the second outlet, and the first outlet and the second inlet can be easily formed.

[0038] (5) A heat exchanger according to any one of (1) to (4), A heat exchanger, wherein the flow direction of the first fluid and the flow direction of the second fluid are opposite to each other within the housing.

[0039] According to (5), the flow of the first fluid and the flow of the second fluid can be made to be counter-current, which further improves the heat exchange efficiency.

[0040] (6) A heat exchanger according to any one of (1) to (4), A heat exchanger in which the first fluid and the second fluid flow in the same direction inside the housing.

[0041] According to (6), the flow of the first fluid and the flow of the second fluid can be made to be a so-called parallel flow, thereby improving the heat exchange efficiency.

[0042] (7) A heat exchanger according to any one of (1) to (6), A heat exchanger, wherein the partition wall is formed by additive manufacturing of a powder material.

[0043] According to (7), the partition wall is formed by additive manufacturing of powdered material, so that partition walls with three-dimensional curved shapes that are difficult to form using common processing methods such as cutting, forging, and punching can be formed with high precision and low cost.

[0044] (8) The heat exchanger according to (7), A heat exchanger, wherein the powdered material is a metal powder.

[0045] According to (8), a metal heat exchanger having a partition wall with a three-dimensional curved surface shape, which is difficult to form, can be formed with high precision and at low cost.

[0046] (9) The heat exchanger according to (7), A heat exchanger, wherein the powdered material is a powdered resin.

[0047] According to (9), a resin heat exchanger having a partition wall with a three-dimensional curved surface shape, which is difficult to form, can be molded with high precision and at low cost.

[0048] (10) The heat exchanger according to (7), A heat exchanger, wherein the powdered material is a ceramic powder.

[0049] According to (10), a ceramic heat exchanger having a partition wall with a three-dimensional curved surface shape, which is difficult to form, can be formed with high precision and at low cost.

[0050] (11) a first flow path (first flow path 10) through which a first fluid flows; a second flow path (second flow path 20) adjacent to the first flow path and through which a second fluid flows; a housing (housing 3) that accommodates the first flow path and the second flow path, Within the housing: The first flow path and the second flow path are separated by a partition wall (partition wall 5) to form flow paths independent of each other, and heat exchange is performed between the first fluid flowing through the first flow path and the second fluid flowing through the second flow path, A method for manufacturing a heat exchanger, wherein the partition wall has a three-dimensional curved shape so that the first flow path and the second flow path extend three-dimensionally, and is formed by additive manufacturing of a powdered material.

[0051] According to (11), it is possible to manufacture a heat exchanger having a partition wall with a three-dimensional curved shape that is difficult to form by common processing methods such as cutting, forging, and punching. This makes it possible to increase the contact area between the first flow path and the second flow path inside the housing, thereby improving the heat exchange efficiency between the first fluid and the second fluid. [Explanation of symbols]

[0052] 1 heat exchanger 3. Housing 5 Partition wall 10 First flow path 11 First entrance 12 1st outlet 20 Second Flow Path 21 Second entrance 22 2nd outlet

Claims

1. a first flow path through which a first fluid flows; a second flow path adjacent to the first flow path and through which a second fluid flows; a housing that accommodates the first flow path and the second flow path, A heat exchanger that performs heat exchange between the first fluid flowing through the first flow path and the second fluid flowing through the second flow path inside the housing, Within the housing, the first flow path and the second flow path are separated by a partition wall to form flow paths independent of each other, the partition wall has a three-dimensional curved surface shape of a gyroid structure, the first flow path and the second flow path extend three-dimensionally; a first inlet for introducing the first fluid into the first flow path; a first outlet for discharging the first fluid that has flowed through the first flow path; a second inlet for introducing the second fluid into the second flow path; a second outlet port for discharging the second fluid that has flowed through the second flow path; Furthermore, The first inlet is provided at one end of the housing in a first direction, the first outlet is provided at the other end of the housing in the first direction, the second inlet is provided at the one end or the other end of the housing in the first direction, the second outlet is provided at an end of the housing opposite to the second inlet in the first direction, the first direction coincides with the flow directions of the first fluid and the second fluid, the gyroid structure is formed by a curved surface that is expressed by an approximate formula of sina·cosb+sinb·cosc+sinc·cosa=0 using trigonometric functions when coordinates in a Cartesian coordinate system of mutually orthogonal a-axis, b-axis, and c-axis are (a, b, c), the partition wall is rotated a predetermined angle around the Y-axis from a state in which the a-axis, the b-axis, and the c-axis of the gyroid structure coincide with the X-axis, the Y-axis, and the Z-axis of an orthogonal coordinate system in which the first direction is the X-axis, respectively, and is rotated a predetermined angle around the X-axis, such that none of the a-axis, the b-axis, and the c-axis of the gyroid structure coincide with the first direction.

2. 2. The heat exchanger of claim 1, A heat exchanger, wherein the first flow paths and the second flow paths are arranged alternately in one direction in a predetermined cross section of the housing.

3. 3. The heat exchanger according to claim 1 or 2, A heat exchanger, wherein the flow direction of the first fluid and the flow direction of the second fluid are opposite to each other within the housing.

4. 3. The heat exchanger according to claim 1 or 2, A heat exchanger, wherein the first fluid and the second fluid flow in the same direction inside the housing.

5. 5. A heat exchanger according to any one of claims 1 to 4, A heat exchanger, wherein the partition wall is formed by additive manufacturing of a powder material.

6. 6. The heat exchanger according to claim 5, A heat exchanger, wherein the powdered material is a metal powder.

7. 6. The heat exchanger according to claim 5, A heat exchanger, wherein the powdered material is a powdered resin.

8. 6. The heat exchanger according to claim 5, A heat exchanger, wherein the powdered material is a ceramic powder.

9. a first flow path through which a first fluid flows; a second flow path adjacent to the first flow path and through which a second fluid flows; a housing that accommodates the first flow path and the second flow path, Within the housing: a heat exchanger manufacturing method comprising: a heat exchanger including: a first flow path and a second flow path, the first flow path and the second flow path being separated by a partition wall to form flow paths independent of each other; and a heat exchanger for performing heat exchange between the first fluid flowing through the first flow path and the second fluid flowing through the second flow path, the method comprising: forming the partition wall having a three-dimensional curved surface shape of a gyroid structure by layer-by-layer manufacturing of a powdered material so that the first flow path and the second flow path extend three-dimensionally; The heat exchanger comprises: a first inlet for introducing the first fluid into the first flow path; a first outlet for discharging the first fluid that has flowed through the first flow path; a second inlet for introducing the second fluid into the second flow path; a second outlet port for discharging the second fluid that has flowed through the second flow path; Furthermore, The first inlet is provided at one end of the housing in a first direction, the first outlet is provided at the other end of the housing in the first direction, the second inlet is provided at the one end or the other end of the housing in the first direction, the second outlet is provided at an end of the housing opposite to the second inlet in the first direction, the first direction coincides with the flow direction of the first fluid and the second fluid, the gyroid structure is formed by a curved surface that is expressed by an approximation formula of sina·cosb+sinb·cosc+sinc·cosa=0 using trigonometric functions when coordinates in a Cartesian coordinate system of mutually orthogonal a-axis, b-axis, and c-axis are (a, b, c), a method for manufacturing a heat exchanger, the method comprising: rotating the gyroid structure by a predetermined angle about the Y-axis from a state in which the a-axis, the b-axis, and the c-axis of the gyroid structure are aligned with the X-axis, the Y-axis, and the Z-axis of an orthogonal coordinate system in which the first direction is the X-axis, and rotating the gyroid structure by a predetermined angle about the X-axis, so that none of the a-axis, the b-axis, and the c-axis of the gyroid structure are aligned with the first direction.

10. A first flow path through which a first fluid flows; a second flow path adjacent to the first flow path and through which a second fluid flows; a housing that accommodates the first flow path and the second flow path, A heat exchanger that performs heat exchange between the first fluid flowing through the first flow path and the second fluid flowing through the second flow path inside the housing, Within the housing, the first flow path and the second flow path are separated by a partition wall to form flow paths independent of each other, the partition wall has a three-dimensional curved surface shape of a gyroid structure, the first flow path and the second flow path extend three-dimensionally; a first inlet for introducing the first fluid into the first flow path; a first outlet for discharging the first fluid that has flowed through the first flow path; a second inlet for introducing the second fluid into the second flow path; a second outlet for discharging the second fluid that has flowed through the second flow path, the first inlet is provided at a first end of the housing in a first direction, the first outlet is provided at a second end of the housing opposite to the first end in the first direction, the second inlet is provided at one of the first end and the second end in the first direction of the housing, and is adjacent to the first inlet or the first outlet, the second exhaust port is provided at the other of the first end and the second end in the first direction of the housing, and is provided adjacent to the first inlet or the first exhaust port, The gyroid structure is When the coordinates in a Cartesian coordinate system of mutually orthogonal axes a, b, and c are (a, b, c), the surface is formed by a curved surface that can be expressed using trigonometric functions as the approximate formula sina.cosb + sinb.cosc + sinc.cosa = 0, the partition wall is formed so that none of the a-axis, the b-axis, and the c-axis of the gyroid structure coincides with the first direction.

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