Heat exchanger and method for manufacturing the same

1 . A heat exchanger comprising:

a first flow path configured to allow a first fluid to flow therethrough;

a second flow path adjacent to the first flow path and configured to allow a second fluid to flow therethrough; and

a housing accommodating the first flow path and the second flow path,

wherein the heat exchanger performs heat exchange inside the housing between the first fluid flowing through the first flow path and the second fluid flowing through the second flow path,

wherein inside the housing, the first flow path and the second flow path are partitioned by a partition wall and form flow paths independent of each other,

wherein the partition wall has a three-dimensional curved surface shape,

wherein the first flow path and the second flow path extend three-dimensionally,

wherein the three-dimensional curved surface shape of the partition wall has a gyroid structure,

wherein the heat exchanger further comprises:

a first introduction port configured to allow the first fluid to be introduced into the first flow path;

a first discharge port configured to allow the first fluid flowing through the first flow path to be discharged from the first flow path;

a second introduction port configured to allow the second fluid to be introduced into the second flow path; and

a second discharge port configured to allow the second fluid flowing through the second flow path to be discharged from the second flow path,

wherein the first introduction port is provided at a first end of the housing in a first direction,

wherein the first discharge port is provided at a second end of the housing opposite to the first end in the first direction,

wherein the second introduction port is provided at one of the first end and the second end of the housing,

wherein the second discharge port is provided at another of the first end and the second end,

wherein the first direction coincides with a flow direction of the first fluid and a flow direction of the second fluid,

wherein the gyroid structure is constituted by a curved surface represented by an approximate expression of sin a·cos b+sin b·cos c+sin c·cos a=0 using a trigonometric function when coordinates in an orthogonal coordinate system of an a axis, a b axis, and a c axis orthogonal to each other are (a, b, c), and

wherein the partition wall is formed such that the a axis, the b axis, and the c axis of the gyroid structure do not coincide with the first direction, by rotating the orthogonal coordinate system of the a axis, the b axis, and the c axis, from a state in which the a axis, the b axis, and the c axis coincide with a X axis extending along the first direction, a Y axis, and a Z axis of another orthogonal coordinate system, around the Y axis by a predetermined angle and around the X axis by a predetermined angle.

2 . The heat exchanger according to claim 1 ,

wherein the first flow path and the second flow path are alternately arranged in one direction in a predetermined cross section of the housing.

3 . The heat exchanger according to claim 1 ,

wherein a flow direction of the first fluid and a flow direction of the second fluid are opposite to each other inside the housing so that the first fluid and the second fluid are counterflows with each other.

4 . The heat exchanger according to claim 1 ,

wherein a flow direction of the first fluid and a flow direction of the second fluid are the same inside the housing.

5 . The heat exchanger according to claim 1 ,

wherein the partition wall is formed by additive manufacturing using powdery material.

6 . The heat exchanger according to claim 5 ,

wherein the powdery material is metal powder.

7 . The heat exchanger according to claim 5 ,

wherein the powdery material is a powdery resin.

8 . The heat exchanger according to claim 5 ,

wherein the powdery material is ceramic powder.

9 . A method for manufacturing a heat exchanger, the heat exchanger including:

a first flow path configured to allow a first fluid to flow therethrough;

a second flow path adjacent to the first flow path and configured to allow a second fluid to flow therethrough; and

a housing accommodating the first flow path and the second flow path,

the first flow path and the second flow path being partitioned by a partition wall and forming flow paths independent of each other, and

the heat exchanger being configured to perform 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 such that the first flow path and the second flow path extend three-dimensionally by additive manufacturing using powdery material,

wherein the three-dimensional curved surface shape of the partition wall has a gyroid structure,

the heat exchanger further comprises:

a first introduction port configured to allow the first fluid to be introduced into the first flow path;

a first discharge port configured to allow the first fluid flowing through the first flow path to be discharged from the first flow path;

a second introduction port configured to allow the second fluid to be introduced into the second flow path; and

a second discharge port configured to allow the second fluid flowing through the second flow path to be discharged from the second flow path,

wherein the first introduction port is provided at a first end of the housing in a first direction,

wherein the first discharge port is provided at a second end of the housing opposite to the first end in the first direction,

wherein the second introduction port is provided at one of the first end and the second end of the housing,

wherein the second discharge port is provided at another of the first end and the second end,

wherein the first direction coincides with a flow direction of the first fluid and a flow direction of the second fluid,

wherein the gyroid structure is constituted by a curved surface represented by an approximate expression of sin a·cos b+sin b·cos c+sin c·cos a=0 using a trigonometric function when coordinates in an orthogonal coordinate system of an a axis, a b axis, and a c axis orthogonal to each other are (a, b, c), and

wherein the partition wall is formed such that the a axis, the b axis, and the c axis of the gyroid structure do not coincide with the first direction, by rotating the orthogonal coordinate system of the a axis, the b axis, and the c axis, from a state in which the a axis, the b axis, and the c axis coincide with a X axis extending along the first direction, a Y axis, and a Z axis of another orthogonal coordinate system, around the Y axis by a predetermined angle and around the X axis by a predetermined angle.