WO2023286631A1

WO2023286631A1 - Housing-inclusive device

Info

Publication number: WO2023286631A1
Application number: PCT/JP2022/026289
Authority: WO
Inventors: 健寛右原; 尚久高橋; 洋敬栗田; 洋之永本; 佳祐栗本; 孝幸小林
Original assignee: ヤマハ発動機株式会社
Priority date: 2021-07-14
Filing date: 2022-06-30
Publication date: 2023-01-19
Also published as: TW202309470A; WO2023286206A1

Abstract

A housing (1) with which a housing-inclusive device (100) is provided has a cooling structure whereby heat generated by a heat source (3) accommodated in an accommodating space (4) formed by means of a housing wall portion (5) is dissipated to the outside of the housing. The housing cooling structure includes a lattice structure portion (20) which is either formed so as to be continuous with an outer surface (6) or an inner surface (7) of the housing wall portion, or is formed so as to be continuous with the housing wall portion that forms a refrigerant passage (10) through which a refrigerant flows, without being continuous with either the outer surface or the inner surface of the housing wall portion. The lattice structure portion (20) includes either a Delaunay lattice structure portion (30) comprising a plurality of first rod-shaped portions (22) forming a plurality of Delaunay edges (32) in a three-dimensional Delaunay graph, or a Voronoi lattice structure portion (40) comprising a plurality of first rod-shaped portions (22) forming the sides of a plurality of Voronoi polyhedrons (43) formed only from Voronoi boundary surfaces (42) of a three-dimensional Voronoi diagram.

Description

Enclosure equipment

The present invention relates to a housing-equipped device having a housing that houses contents including a heat source.

The housing that houses the content including the heat source has a housing wall that forms a housing space that houses the content including the heat source. 2. Description of the Related Art Conventionally, as a housing for housing contents including a heat source, there is a housing having a cooling structure for dissipating heat generated by the heat source to the outside of the housing.

As a housing cooling structure, an elongated coolant passage may be formed between the outer surface and the inner surface of the housing wall. The heat generated by the heat source is radiated to the outside through the refrigerant flowing through the refrigerant passage. An elongated refrigerant passage is a refrigerant passage formed so that the maximum width of the refrigerant passage in a cross section across the refrigerant flow direction is shorter than the length of the refrigerant passage in the refrigerant flow direction. For example, a housing that is mounted on the electric vehicle disclosed in

Patent Documents

1 and 2 and houses a motor (heat source) has a housing wall portion in which an elongated refrigerant passage is formed. The housing wall portion of

Patent Documents

1 and 2 includes an inner cylinder and an outer cylinder that hold the stator of the motor. A coolant passage is formed between the inner cylinder and the outer cylinder. In

Patent Documents

1 and 2, the refrigerant passage is devised to improve the cooling efficiency. Specifically, in

Patent Documents

1 and 2, a plurality of narrowed portions (concave portions) are provided so that the cross-sectional area of the refrigerant passage is partially reduced. In addition, a plurality of fins connected to at least the inner cylinder are provided inside the refrigerant passage of Patent Document 1. The refrigerant passage of Patent Document 2 is provided with a plurality of cylinders that connect the inner cylinder and the outer cylinder. In Patent Literature 1, the efficiency of heat exchange is improved by generating turbulence in the refrigerant flow by the restrictor and bringing the turbulent coolant flow into contact with fins provided downstream of the restrictor. In Patent Literature 2, the efficiency of heat exchange is improved by generating turbulence in the refrigerant flow by means of the throttle portion and the cylinder to eliminate the stagnation of the refrigerant.

In addition, as a cooling structure of the housing, there are cases where a plurality of heat radiation fins are provided on the surface of the housing wall portion, as in

Patent Documents

3 and 4, for example. The heat generated by the heat source is radiated to the outside of the housing through the radiation fins. The housings of

Patent Documents

3 and 4 are mounted on an unmanned air vehicle and accommodate a motor (heat source). In Patent Document 3, heat radiation fins having a solid structure are provided. In Patent Document 4, by providing the heat radiation fins with a lattice structure, the surface area of the heat radiation fins is increased compared to the case where the heat radiation fins with a solid structure are provided, thereby improving the cooling performance.

JP-A-08-19218 JP 2010-041835 A WO2016/192022 WO2020/195004

A case-equipped device that accommodates contents including a heat source and has a case that has a cooling structure is required to improve the cooling performance of the case while suppressing an increase in the size of the case-equipped device. In addition, a case-equipped device that accommodates contents including a heat source and has a case that has a cooling structure is required to increase the degree of freedom in designing the shape of the case-equipped device while ensuring the cooling performance of the case. be done.

INDUSTRIAL APPLICABILITY The present invention can improve the cooling performance of a housing while suppressing an increase in the size of a device equipped with a housing, or improve the degree of freedom in designing the shape of a device equipped with a housing while ensuring the cooling performance of the housing. It is an object of the present invention to provide a housing-equipped device that can

A housing that houses contents including a heat source has a problem that the shape of the outer surface and inner surface of the housing is restricted for the following two reasons. The first reason is that it is necessary to consider the shape of the contents and the interference with surrounding parts when mounting the housing. The second reason is that it is necessary to secure the rigidity and strength necessary to support the contents and the housing itself.
Moreover, when the housing has a cooling structure, the following problems still exist. Enclosures that are restricted by the shape of the outer and inner surfaces of the enclosure can improve cooling performance while suppressing the enlargement of the enclosure, or improve the design freedom of the enclosure shape while ensuring cooling performance. is required.
When a long and narrow coolant passage is formed between the outer surface and the inner surface of the housing wall as the cooling structure, the following problems still exist. Restrictions on the shape of the outer and inner surfaces of the housing impose restrictions on the shape of the coolant passage formed inside the wall of the housing.
In order to improve the cooling performance of the housing while suppressing the increase in the size of the housing, or to improve the design freedom of the shape of the housing while ensuring the cooling performance of the housing, the patent The enclosures and enclosure walls of Document 1 and Patent Document 2 were studied in more detail. In

Patent Literatures

1 and 2, by partially changing the cross-sectional area of the elongated refrigerant passage with a constricted portion, turbulent flow is generated to improve cooling performance. However, since the flow velocity of the refrigerant decreases after passing through the portion where the cross-sectional area is small, the range of turbulent flow generated by the constricted portion is limited. Moreover, since the constricted portions of

Patent Documents

1 and 2 have a simple constricted shape, vortices forming turbulence tend to become large.
Further, in Patent Document 2, a plurality of cylinders formed inside the coolant passage generate a turbulent flow of the coolant around the cylinders. The stirring action of this turbulent flow reduces the stagnation of the refrigerant, thereby increasing the efficiency of heat exchange and enhancing the cooling performance. However, the range of turbulence generated by the cylinder is limited. Moreover, the eddy that constitutes the turbulent flow generated by the cylinder tends to grow large. Also, high flow velocities are required to create turbulence with a cylinder. When the flow velocity is low, only the Karman vortex street occurs, so the stirring action is small.
In addition, since the shape of the outer and inner surfaces of the housing is restricted, the shape of the refrigerant passage, the position of the restrictor, and the orientation and position of the cylinder are also restricted. Therefore, when observed in more detail, in

Patent Documents

1 and 2, there is an imbalance in the position where the coolant flows and/or the flow velocity of the coolant in the cross section of the coolant passage, and there is room for improving the cooling efficiency. .
Moreover, when fins are provided on the surface of the housing wall portion as a cooling structure, the following problems exist. Since it is necessary to secure a large area for providing the fins on the housing wall, the shape of the housing is highly restricted.
In order to improve the cooling performance while suppressing an increase in the size of the housing, or to improve the degree of freedom in designing the shape of the housing while ensuring the cooling performance, the inventors of

Patent Documents

3 and 4 have been proposed. Thus, a more detailed study was conducted on a housing having a plurality of fins on the surface of the housing wall. When a plurality of fins having a solid structure are provided as in Patent Document 3, the air around the fins can only flow along the surfaces of the fins and is restricted in the direction of flow. Therefore, there is room for improving the cooling performance. When a plurality of fins with a lattice structure are provided as in Patent Document 4, air can also flow through the inside of the fins, so the cooling performance may be improved compared to the case where fins with a solid structure are provided. However, since the fins are in the form of a thin plate, providing a plurality of lattice-structured fins on the surface of the housing wall does not contribute much to improving the rigidity and strength of the housing itself. In addition, the fins of solid structure and lattice structure can absorb impact by deforming when impact is applied to the housing. However, fins with a solid structure and a fin with a lattice structure have a large difference in impact absorption depending on the direction in which the impact is applied. Therefore, by increasing the rigidity and strength of the cooling structure while suppressing the anisotropy of the shock absorption of the cooling structure provided on the surface of the housing wall, compared to the case where multiple fins with a lattice structure are provided, cooling There is room for improving the degree of freedom in designing the shape of the housing while ensuring performance.

A housing-equipped device according to one embodiment of the present invention has the following configuration.
A housing-equipped device comprising a housing having a housing wall forming a housing space for housing content including a heat source, wherein the housing dissipates heat generated by the heat source to the outside of the housing. The cooling structure is formed so as to be continuous with the outer surface or the inner surface of the housing wall, or the cooling structure is formed to be continuous with either the outer surface or the inner surface of the housing wall a lattice structure formed so as to be discontinuous and continuous with the housing wall forming a coolant passage through which a coolant flows, wherein the coolant passage extends between the outer surface and the inner surface of the housing wall; and the maximum width of the refrigerant passage in a cross section crossing the refrigerant flow direction is shorter than the length of the refrigerant passage in the refrigerant flow direction, and the housing wall portion of the When the maximum width in the thickness direction of the housing wall of the lattice structure formed so as to be continuous with the outer surface or the inner surface is defined as a first width, the outer surface of the housing wall or the When the lattice structure is viewed in a direction perpendicular to the region of the inner surface where the lattice structure is provided, any line segment that fits in the lattice structure and that is perpendicular to the longest line segment that fits in the lattice structure The length is longer than the first width, the lattice structure consists of a plurality of rod-shaped parts, and the lattice structure is based on a plurality of randomly distributed Delaunay points in a three-dimensional Delaunay diagram Delaunay lattice structure composed of a plurality of first rod-shaped parts forming a plurality of Delaunay edges, or formed only by a Voronoi boundary surface in a three-dimensional Voronoi diagram with a plurality of virtual points randomly distributed in three dimensions as generating points a Voronoi lattice structure composed of a plurality of first rod-shaped portions forming sides of a plurality of Voronoi polyhedrons, wherein the Delaunay lattice structure has three mutually orthogonal line segments each of which is the first rod-shaped portion The Voronoi lattice structure is formed so as to pass through two or more Delaunay triangular pyramids each having four Delaunay points formed by connecting points, and the Voronoi lattice structure has three mutually orthogonal line segments each connected to the first rod-shaped part It is formed through two or more Voronoi polyhedra with only vertices formed by their connection points.

According to this configuration, the housing of the housing-equipped device may have a lattice structure formed so as to be continuous with the housing wall forming the refrigerant passage through which the refrigerant flows. The lattice structure consists of a plurality of rod-shaped parts. The lattice structure includes a Delaunay lattice structure or a Voronoi lattice structure. The Delaunay lattice structure consists of a plurality of first rod-shaped portions forming a plurality of Delaunay edges in a three-dimensional Delaunay diagram based on a plurality of Delaunay points randomly distributed in three dimensions. Further, the Delaunay lattice structure is formed so that each of the three line segments perpendicular to each other passes through two or more Delaunay triangular pyramids each having the four Delaunay points formed by the connecting points of the first rod-shaped portions. be done. Due to the characteristics of the Delaunay diagram, the Delaunay triangular pyramid is formed so that the constituent surfaces are as close to equilateral triangles as possible. Therefore, in the Delaunay lattice structure, the connection angle between the first rod-like portions is unlikely to be extremely large or small. Further, in the Delaunay lattice structure, the directions of the plurality of first rod-shaped portions are less likely to deviate in a specific direction. The Voronoi lattice structure part is a plurality of first rod-like structures forming sides of a plurality of Voronoi polyhedrons formed only by Voronoi boundary surfaces in a three-dimensional Voronoi diagram having a plurality of virtual points randomly distributed in three dimensions as a base point. consists of Further, the Voronoi lattice structure is formed such that each of the three line segments orthogonal to each other passes through two or more Voronoi polyhedrons having only vertices formed by connecting points between the first rod-shaped portions. The Voronoi diagram is dual to the Delaunay diagram. A Delaunay edge is formed by connecting two generating points on both sides of the Voronoi boundary surface in the Voronoi diagram. Therefore, even in the Voronoi lattice structure, the connection angle between the first rod-shaped portions is unlikely to be extremely large or small. Also in the Voronoi lattice structure, the directions of the plurality of first rod-shaped portions are less likely to deviate in a specific direction. By flowing the refrigerant inside the lattice structure having such a configuration, it is possible to prevent the occurrence of large eddies in the turbulent flow field, divide the refrigerant flow flowing through the refrigerant passage, and add small eddies to the refrigerant flow. . Moreover, when the flow velocity of the coolant is the same as when the column is provided inside the coolant passage, a turbulent flow with a higher agitating action can be generated. Therefore, even if there are restrictions on the shape of the outer surface and the inner surface of the housing and the resulting restrictions on the position of the coolant passage, etc., the cross section passing through the lattice structure of the coolant passage is not affected by these restrictions. It is easy to adjust the position where the coolant flows and/or the bias and/or the flow velocity of the coolant. If the lattice structure has a regular structure, even if the positional deviation of the coolant flow can be suppressed at a certain flow rate, the positional deviation of the coolant flow may occur when the flow rate changes. On the other hand, the directions of the plurality of rod-shaped portions that constitute the Delaunay lattice structure and the Voronoi lattice structure are random. Therefore, even if the flow rate of the coolant changes, it is possible to suppress the deviation of the position where the coolant flows. Therefore, it is possible to improve the cooling performance of the housing while suppressing an increase in the size of the housing, or to further improve the degree of freedom in designing the shape of the housing while ensuring the cooling performance of the housing. Furthermore, compared to the case of providing a cylinder in the coolant passage, the rigidity and strength of the housing can be increased over a wide range rather than locally, and the rigidity and strength of the housing can be increased in more directions. Moreover, the rigidity and strength are high, so the degree of freedom in designing the shape of the housing can be improved, or the rigidity and strength can be secured by the lattice structure, so even if the cooling performance is further improved, the size of the housing can be increased. can be suppressed.
The housing may have a lattice structure formed contiguously with the outer surface or the inner surface of the housing wall. The configuration of the lattice structure is the same as that of the lattice structure formed so as to be continuous with the housing wall forming the coolant passage. Since the fluid flows in the lattice structure having such a configuration, the fluid can also flow in multiple directions along the surface of the housing wall, for example. Therefore, in the configuration in which the lattice structure is provided, the cooling performance can be made higher than in the configuration in which a plurality of solid-structured fins are provided on the surface of the housing wall.
Further, when the maximum width of the lattice structure in the thickness direction of the housing wall is defined as the first width, the lattice structure extends in a direction perpendicular to the region where the lattice structure is provided on the outer surface or the inner surface of the housing wall. Looking at the section, the length of any line segment within the lattice structure that is orthogonal to the longest line segment within the lattice structure is greater than the first width. Therefore, the lattice structure is not a thin plate like a fin. The fins are laminated for cooling performance, the fins are spaced apart and are not connected to each other. Therefore, the lattice structure fins are not very rigid and strong. On the other hand, since the lattice structure is not in the form of a thin plate like fins, when the lattice structure is provided on the surface of the housing wall, a plurality of fins of the lattice structure are provided on the surface of the housing wall. Compared to the case, even if the thickness of the housing wall portion is about the same, the degree of freedom in designing the shape of the housing can be improved while ensuring the rigidity and strength of the housing. In addition, the fins of solid structure and lattice structure have a large difference in the ease of deformation and the manner of deformation depending on the direction in which force is applied. In other words, the fins with a solid structure and a fin with a lattice structure have a large difference in shock absorption depending on the direction in which the shock is applied. In order to reduce the impact on the contents when an impact is applied to the housing in a direction in which the fins have low impact absorption, it is necessary to add restrictions to the shape of the housing. On the other hand, the lattice structure part has a small difference in shock absorption due to the difference in the direction in which the shock is applied. Therefore, compared to the case where a plurality of fins having a lattice structure are provided on the surface of the housing wall portion, the degree of freedom in designing the shape of the housing can be further improved while ensuring the cooling performance of the housing.
By suppressing an increase in the size of the housing, it is possible to suppress an increase in the size of the apparatus provided with the housing. In addition, by improving the degree of freedom in designing the shape of the housing, it is possible to improve the degree of freedom in designing the shape of the device provided with the housing. As described above, the housing-equipped device of the present invention can improve the cooling performance of the housing while suppressing an increase in the size of the housing-equipped device, or can ensure the cooling performance of the housing. The degree of freedom in designing the shape of the can be improved.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
In the Delaunay lattice structure or the Voronoi lattice structure, some of the plurality of first rods are formed so as to be continuous with the housing wall.

According to this configuration, it is possible to configure all of the plurality of rod-shaped portions that constitute the lattice structure from the first rod-shaped portion. In this case, it is possible to further improve the cooling performance of the housing while suppressing an increase in the size of the housing, or to further improve the degree of freedom in designing the shape of the housing while ensuring the cooling performance of the housing.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
The plurality of rod-shaped portions constituting the lattice structure include, in addition to the plurality of first rod-shaped portions constituting the Delaunay lattice structure or the Voronoi lattice structure, a plurality of second rod-shaped portions. The two rod-shaped portions are formed such that an end of the first rod-shaped portion forming one Delaunay point or one vertex of the Voronoi polyhedron, at least one of the second rod-shaped portions, and the housing wall are continuously formed. is provided as follows.

According to this configuration, the plurality of second rod-shaped parts are not included in either the Delaunay lattice structure part or the Voronoi lattice structure part. The plurality of second rod-shaped portions are formed such that the end of the first rod-shaped portion forming one Delaunay point or one vertex of the Voronoi polyhedron, at least one second rod-shaped portion, and the housing wall are continuously formed. provided in The second rod-shaped portion is a rod-shaped portion that is clearly not forming a Delaunay edge or a side of the Voronoi polyhedron, or a rod-shaped portion that cannot be determined from the lattice structure whether it forms a Delaunay edge or a side of the Voronoi polyhedron. be. For example, when a structure in which all Delaunay sides are formed of rod-shaped portions is created and then this structure is cut into a specific shape, the Delaunay sides are formed at the ends of the structure of this specific shape. There may be a rod-shaped portion that cannot be identified from the structure. Since the lattice structure has a plurality of such second rod-shaped portions in addition to the Delaunay lattice structure or the Voronoi lattice structure, the degree of freedom in the shape of the lattice structure is improved. Therefore, it is possible to further improve the cooling performance of the housing while suppressing an increase in the size of the housing, or to further improve the degree of freedom in designing the shape of the housing while ensuring the cooling performance of the housing.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
When the lattice structure includes the Delaunay lattice structure, the shortest distance between the end of the first rod-shaped portion to which the second rod-shaped portion is connected and the housing wall portion is the plurality of first rod-shaped portions. When the lattice structure is less than or equal to the maximum length of the portion and the lattice structure includes the Voronoi lattice structure, the end of the first rod-shaped portion to which the second rod-shaped portion is connected and the housing wall portion is shorter than the maximum length of the diagonals of the plurality of Voronoi polyhedrons formed only by the Voronoi boundary surfaces.

According to this configuration, the shortest distance between the end of the first rod-shaped portion to which the second rod-shaped portion is connected and the housing wall portion is shorter than the Delaunay side or the Voronoi polyhedron. That is, the space in which at least one second rod-shaped portion connecting between the end of the first rod-shaped portion and the housing wall portion is arranged is narrower than the Delaunay side or the Voronoi polyhedron. Therefore, there is a high possibility that the second rod-shaped portion is a rod-shaped portion that originally forms a Delaunay edge or a side of the Voronoi polyhedron, but cannot be identified from the lattice structure as to whether it forms a Delaunay edge or a side of the Voronoi polyhedron. When the second rod-shaped portion is originally a rod-shaped portion forming a Delaunay side or a side of a Voronoi polyhedron, in the lattice structure, it is possible to further suppress unevenness in connection angles between the rod-shaped portions and unevenness in the direction of the rod-shaped portions. Therefore, when the lattice structure is provided in the coolant passage, it is easier to adjust the position of the coolant flowing in the cross section passing through the lattice structure of the coolant passage and/or the deviation of the coolant flow velocity and/or the flow velocity. In addition, by suppressing the uneven connection angle between the rod-shaped portions and the unevenness in the direction of the rod-shaped portions, the rigidity and strength of the housing are increased by the lattice structure, and the unevenness in the direction of the rigidity and strength of the housing is further reduced. can be suppressed. Therefore, even if the lattice structure is provided on either side, the cooling performance of the housing can be further improved while suppressing an increase in the size of the housing, or the housing can be designed freely in shape while ensuring the cooling performance of the housing. degree can be improved.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
In the Delaunay lattice structure, the maximum length of the plurality of first rod-shaped portions is smaller than four times the average length of the plurality of first rod-shaped portions.

According to this configuration, the plurality of first rod-shaped portions forming the Delaunay lattice structure do not include extremely long first rod-shaped portions. Therefore, in the lattice structure portion, it is possible to further suppress unevenness in connection angles between the first rod-shaped portions and unevenness in the direction of the first rod-shaped portions. Therefore, when the lattice structure is provided in the coolant passage, it is easier to adjust the position of the coolant flowing in the cross section passing through the lattice structure of the coolant passage and/or the deviation of the coolant flow velocity and/or the flow velocity. In addition, by suppressing the deviation of the connection angle between the first rod-shaped parts and the deviation of the direction of the first rod-shaped parts, the rigidity and strength of the housing are increased by the lattice structure, and the rigidity and strength of the housing are improved. bias can be further suppressed. Therefore, even if the lattice structure is provided on either side, the cooling performance of the housing can be further improved while suppressing an increase in the size of the housing, or the housing can be designed freely in shape while ensuring the cooling performance of the housing. degree can be improved.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
In the Voronoi lattice structure portion, the maximum value of the distance between the two generating points located on both sides of the Voronoi boundary surface surrounded by the plurality of first rod-shaped portions is the Voronoi surrounded by the plurality of first rod-shaped portions. It is smaller than four times the average value of the distances of the two generating points located on both sides of the boundary surface.

According to this configuration, the plurality of generating points do not include generating points where the distance between two generating points located on both sides of the Voronoi boundary surface is extremely long. Therefore, the plurality of first rod-shaped portions forming the Voronoi lattice structure do not include extremely long first rod-shaped portions. Therefore, in the lattice structure portion, it is possible to further suppress unevenness in connection angles between the first rod-shaped portions and unevenness in the direction of the first rod-shaped portions. Therefore, when the lattice structure is provided in the coolant passage, it is easier to adjust the position of the coolant flowing in the cross section passing through the lattice structure of the coolant passage and/or the deviation of the coolant flow velocity and/or the flow velocity. In addition, by suppressing the deviation of the connection angle between the first rod-shaped parts and the deviation of the direction of the first rod-shaped parts, the rigidity and strength of the housing are increased by the lattice structure, and the rigidity and strength of the housing are improved. bias can be further suppressed. Therefore, even if the lattice structure is provided on either side, the cooling performance of the housing can be further improved while suppressing an increase in the size of the housing, or the housing can be designed freely in shape while ensuring the cooling performance of the housing. degree can be improved.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
In the Voronoi lattice structure, the maximum length of the plurality of first rod-shaped portions is less than five times the average length of the plurality of first rod-shaped portions.

According to this configuration, the plurality of first rod-shaped portions that constitute the Voronoi lattice structure do not include extremely long first rod-shaped portions. Therefore, in the lattice structure portion, it is possible to further suppress unevenness in connection angles between the first rod-shaped portions and unevenness in the direction of the first rod-shaped portions. Therefore, when the lattice structure is provided in the coolant passage, it is easier to adjust the position of the coolant flowing in the cross section passing through the lattice structure of the coolant passage and/or the deviation of the coolant flow velocity and/or the flow velocity. In addition, by suppressing the deviation of the connection angle between the first rod-shaped parts and the deviation of the direction of the first rod-shaped parts, the rigidity and strength of the housing are increased by the lattice structure, and the rigidity and strength of the housing are improved. bias can be further suppressed. Therefore, even if the lattice structure is provided on either side, the cooling performance of the housing can be further improved while suppressing an increase in the size of the housing, or the housing can be designed freely in shape while ensuring the cooling performance of the housing. degree can be improved.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
The lattice structure portion is formed so as to be continuous with the housing wall portion forming the coolant passage without being continuous with either the outer surface or the inner surface of the housing wall portion, and the housing-equipped device. introduces the gas or liquid around the housing-equipped device as the refrigerant into the refrigerant passage, and discharges the refrigerant after passing through the refrigerant passage to the surroundings of the housing-equipped device. , the housing-equipped device does not have a radiator for cooling the coolant after passing through the coolant passage.

According to this configuration, it is possible to suppress an increase in the size of the housing-equipped device, compared to the case where the housing-equipped device has a radiator and is configured to circulate a coolant.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
The lattice structure is formed so as to be continuous with neither the outer surface nor the inner surface of the housing wall and is continuous with the housing wall forming the coolant passage, The length in the coolant flow direction is longer than the maximum width of the coolant passage in the cross section passing through the lattice structure.

According to this configuration, the position of the coolant flowing in the cross section passing through the lattice structure of the coolant passage and/or the deviation of the coolant flow speed and/or the flow speed can be adjusted without being affected by the restrictions of the shape of the outer surface and the inner surface of the housing. Easy to adjust. Therefore, it is possible to further improve the cooling performance of the housing while suppressing an increase in the size of the housing, or to further improve the degree of freedom in designing the shape of the housing while ensuring the cooling performance of the housing.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
The lattice structure is formed so as to be continuous with neither the outer surface nor the inner surface of the housing wall and is continuous with the housing wall forming the coolant passage, The length in the coolant flow direction is longer than the circumferential length of the coolant passage in the cross section passing through the lattice structure.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
The lattice structure portion is formed so as to be continuous with neither the outer surface nor the inner surface of the housing wall portion and is continuous with the housing wall portion forming the refrigerant passage, and the lattice structure portion is When the Delaunay lattice structure portion is included, the lattice structure portion has two mutually orthogonal line segments included in the first cross section that traverses the coolant flow direction, each formed by a connecting point between the first rod-shaped portions. a portion of the housing wall, the lattice structure and the housing wall in each of the directions of the two line segments passing through two or more Delaunay triangular pyramids having the four Delaunay points, respectively. When the lattice structure portion includes the Voronoi lattice structure portion, the lattice structure portion includes two line segments perpendicular to each other included in the first cross section crossing the coolant flow direction. each passes through two or more Voronoi polyhedra having only vertices formed by the connecting points of the first rods, and in each of the directions of the two line segments, a portion of the housing wall and the The lattice structure and another part of the housing wall are formed so as to be continuous.

According to this configuration, the lattice structure can be arranged so that the coolant passage in the housing wall is filled with the lattice structure without sacrificing the flow of the coolant. Therefore, the rigidity, strength and cooling performance of the housing can be improved to a higher level. Specifically, the lattice structure makes it easier to adjust the bias and/or the flow velocity, so that the cooling performance of the housing can be further improved. In addition, while improving the rigidity and strength of the housing, the cooling performance of the housing can be further improved by adjusting the distance between the heat source and the coolant and the state of the flow of the coolant. Therefore, it is possible to further improve the cooling performance of the housing while suppressing an increase in the size of the housing, or to further improve the degree of freedom in designing the shape of the housing while ensuring the cooling performance of the housing.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
The lattice structure portion is formed so as to be continuous with the housing wall portion forming the coolant passage without being continuous with either the outer surface or the inner surface of the housing wall portion, and is continuous with the housing wall portion forming the coolant passage. At least a portion of the coolant flow direction is provided with a first passage portion provided with at least a portion of the lattice structure portion, and the lattice structure portion aligned in a direction intersecting the first passage portion with the coolant flow direction. and a second passage portion that is not lined, and when the lattice structure includes the Delaunay lattice structure, the Delaunay lattice structure includes three mutually orthogonal line segments included in the first passage portion. , formed so as to pass through two or more Delaunay triangular pyramids each having four Delaunay points formed by connection points between the first rod-shaped portions, and the lattice structure includes the Voronoi lattice structure, In the Voronoi lattice structure, each of three mutually orthogonal line segments included in the first passage portion passes through two or more Voronoi polyhedrons each having only vertices formed by connection points between the first rod-shaped portions. is formed as

According to this configuration, the coolant passage has a first passage portion provided with at least a portion of the lattice structure and a second passage portion not provided with the lattice structure. If the cross-sectional area of the coolant passage is the same, the lattice structure provided only in part of the cross-section of the coolant passage is better than the lattice structure provided over the entire cross-section of the coolant passage. Low fluid resistance. Since the refrigerant passage has the first passage portion and the second passage portion, in terms of the resistance of the refrigerant passage, the circumferential length of the refrigerant passage is reduced compared to the case where the entire cross section of the refrigerant passage is provided with a lattice structure. can be made smaller. When the circumference of the coolant passage is reduced, the cooling performance of the housing can be improved while suppressing the size of the housing, or the design freedom of the housing shape can be increased while maintaining the cooling performance of the housing. can improve.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
The lattice structure is formed so as to be continuous with neither the outer surface nor the inner surface of the housing wall and is continuous with the housing wall forming the coolant passage, At least a portion is provided in at least one of at least one of a flow direction changing portion in the refrigerant passage where the direction of refrigerant flow changes and a cross section changing portion in the refrigerant passage where the area of the cross section changes, When at least a portion of a lattice structure is provided in at least a portion of the flow direction changing portion, and the lattice structure includes the Delaunay lattice structure, the Delaunay lattice structure has the flow direction changing portion. Two line segments orthogonal to each other included in the second cross section crossing each other pass through two or more Delaunay triangular pyramids each having four said Delaunay points formed by connecting points between said first rod-shaped parts. at least a portion of the lattice structure is provided in at least a portion of the flow direction changing portion, and the lattice structure includes the Voronoi lattice structure, the Voronoi lattice structure is the Two line segments orthogonal to each other included in the second cross section crossing the flow direction changing portion pass through two or more Voronoi polyhedrons having only vertices formed by connecting points of the first rod-shaped portions. at least part of the lattice structure is provided in at least part of the cross-section changing part, and when the lattice structure includes the Delaunay lattice structure, the Delaunay lattice structure has the cross section Two or more Delaunay triangular pyramids each having four Delaunay points formed by connection points between the first rod-shaped portions, each of which is included in a third cross section crossing the change portion and which is perpendicular to each other. When at least part of the lattice structure is provided in at least part of the cross-section changing part, and the lattice structure includes the Voronoi lattice structure, the Voronoi lattice structure is formed to pass through: Two line segments perpendicular to each other included in the third cross section crossing the cross-section changing portion pass through two or more Voronoi polyhedrons having only vertices formed by connecting points between the first rod-shaped portions. formed in

According to this configuration, at least part of the Delaunay lattice structure or the Voronoi lattice structure may be provided in at least part of the flow direction changing part. In this case, the Delaunay lattice structure or the Voronoi lattice structure suppresses the generation of large vortices by the flow direction changing part, and the combination of the Delaunay lattice structure or the Voronoi lattice structure and the flow direction changing part creates a small vortex in the refrigerant flow. can be added. Therefore, it is easier to adjust the deviation and/or the flow velocity without being affected by the restrictions of the shape of the outer surface and the inner surface of the housing. Also, at least part of the Delaunay lattice structure or the Voronoi lattice structure may be provided in at least part of the cross-section changing part. In this case, the Delaunay lattice structure or the Voronoi lattice structure suppresses the generation of large vortices by the cross-section changing portion, and the combination of the Delaunay lattice structure or the Voronoi lattice structure and the cross-section changing portion adds a small vortex to the refrigerant flow. can be done. Therefore, it is easier to adjust the deviation and/or the flow velocity without being affected by the restrictions of the shape of the outer surface and the inner surface of the housing. Therefore, it is possible to further improve the cooling performance of the housing while suppressing an increase in the size of the housing, or to further improve the degree of freedom in designing the shape of the housing while ensuring the cooling performance of the housing.

A housing-equipped device according to an embodiment of the present invention may have the following configuration.
The lattice structure is formed so as to be continuous with the outer surface or the inner surface of the housing wall, and the lattice structure is connected to the outer surface or the inner surface of the housing wall by metal additive manufacturing. It is integrally molded according to the law.

According to this configuration, since the lattice structure is integrally formed with at least a part of the housing wall, heat is easily conducted from the lattice structure to the housing wall or from the housing wall to the lattice structure. Therefore, the cooling performance of the housing can be further improved.

<Device equipped with housing>
In addition, in the present invention and the embodiments, a device provided with a housing is a device provided with a housing for housing contents including a heat source and the contents. The type of device is not particularly limited. In the present invention and the embodiments, the housing-equipped device is, for example, an electric small vehicle such as an electric wheelchair, an electric saddle-ride type vehicle, or an electric small four-wheeled vehicle, an unmanned flying object (so-called drone), an electric outboard motor. , and industrial robots. Straddle-type vehicles include, for example, motorcycles, motor tricycles, four-wheeled buggies (ATVs: All Terrain Vehicles), snowmobiles, personal water crafts, and the like. Motorcycles include scooters, motorized bicycles, mopeds, and the like. Industrial robots may or may not be self-propelled. An outboard motor has a portion that is placed underwater and a portion that is positioned above the surface of the water. The part above the water level is attached to the ship. The housing that houses the heat source may be included in the part that is placed underwater or in the part that is above the water surface. When the lattice structure is formed to be continuous with the outer surface or the inner surface of the housing wall, the lattice structure may or may not be exposed to the outside of the housing-equipped device. If the lattice structure is not exposed to the exterior of the housing device, the fluid (gas or liquid) surrounding the housing device will enter the interior of the housing device and pass through the lattice structure.

<Heat source>
In the present invention and embodiments, a heat source means an object that generates heat by itself. A heat source does not include anything that receives thermal energy and generates heat. The heat source may or may not be a device. Heat sources include objects that are capable of generating heat multiple times. Heat sources may include objects that are capable of generating heat multiple times and objects that generate heat only once. A heat source need not include a one-time heat generating object. Heat sources include objects that generate heat from electrical energy. A heat source may be, for example, anything that generates heat from electrical energy. Heat sources may include those that generate heat from electrical energy and those that generate heat from kinetic energy. A heat source need not include anything that generates heat from electrical energy. Heat resulting from kinetic energy is, for example, frictional heat. Heat sources may include those that generate heat from electrical energy and those that generate heat through chemical reactions. Heat sources may include those that generate heat from electrical energy, those that generate heat from kinetic energy, and those that generate heat through chemical reactions. The heat source may be free of substances that generate heat through chemical reactions.

<Case>
In the present invention and embodiments, the housing may be configured such that the housing space for housing the heat source is in a sealed state. The housing may or may not have a sealing component for sealing the housing space.

<Case wall>
In the present invention and embodiments, the inner surface of the housing wall means the surface forming the accommodation space of the housing wall. The inner surface of the housing wall is exposed to the gas within the housing space. Alternatively, the inner surface of the housing wall is exposed to the liquid in the accommodation space. The outer surface of the housing wall means the side opposite to the inner surface of the housing wall. The outer surface of the housing wall may or may not be parallel to the inner surface of the housing wall. The outer surface of the housing wall may or may not form the outer surface of the housing.
In the present invention and embodiments, the housing wall may be composed of one independent component or may be composed of a plurality of components. For example, the housing wall may be composed of a plurality of parts that are connected in the refrigerant flow direction. Further, for example, the outer surface and the inner surface of the housing wall may be formed of different components. The inner surface of the housing wall portion to the coolant passage may be integrally molded. The outer surface of the housing wall portion to the coolant passage may be integrally molded. The material of the housing wall is not particularly limited. The housing wall may be made of, for example, metal or synthetic resin.

<Refrigerant passage>
In the present invention and embodiments, a refrigerant passage means a space through which a refrigerant flows. In the present invention and embodiments, the refrigerant passage may have a shape that allows a single stroke from the inlet to the outlet of the refrigerant, or may have a branch point where the refrigerant flow branches and/or a confluence point where the refrigerant flows join. The coolant passage may be tubular and formed between the tubular inner surface and the tubular outer peripheral surface of the housing wall portion. In this case, the refrigerant flows in the cylinder axis direction. In the present invention and embodiments, the housing wall may have multiple coolant passages or may have a single coolant passage. That is, the housing wall may have at least one coolant passage.

In the present invention and embodiments, the refrigerant may be either liquid or gas. The liquid refrigerant may be water or may be other than water. The gas refrigerant may be air or may be other than air. In the present invention and the embodiments, the housing-equipped device introduces the gas or liquid around the housing-equipped device as a refrigerant into the refrigerant passage, and the refrigerant after passing through the refrigerant passage is introduced into the surroundings of the housing-equipped device. By configured to discharge to, it is meant that the coolant is not circulated in the enclosed device. In the present invention and the embodiments, when the refrigerant is air, introduction of the refrigerant into the refrigerant passage includes airflow generated by the movement of the housing-equipped device, airflow generated by the flight propeller of the housing-equipped device, and At least one airflow generated by a fan included in the enclosure may be utilized. It should be noted that the fan here is a blower having a smaller static pressure than a so-called compressor. The fan may or may not be provided in the housing. The fan may be a fan dedicated to introducing the refrigerant, or a fan used for purposes other than introducing the refrigerant. If the coolant is air, the enclosed device may not have a fan used to introduce the coolant. In the present invention and the embodiments, when the refrigerant is a liquid, the introduction of the refrigerant into the refrigerant passage is caused by the liquid flow caused by the movement of the housing-equipped device and the liquid flow caused by the pump of the housing-equipped device. At least one may be used. If the refrigerant is a liquid, the enclosure-equipped device may not have a pump used to introduce the refrigerant into the refrigerant passages. In the present invention and the embodiments, having no radiator for cooling the refrigerant after passing through the refrigerant passage means not having a device for cooling the refrigerant by heat exchange after passing through the refrigerant passage. means. If the enclosure-equipped device is an air vehicle, ground-driving vehicle, or industrial robot, the coolant is air. If the housing-equipped device is a vehicle or an outboard motor that travels on water, the coolant may be air or water. When the enclosure-equipped device is an aircraft, at least one of the three air flows described above is used to introduce the coolant into the coolant passage. When the housing-equipped device is a vehicle, an industrial robot, or an outboard motor, and the coolant is air, the introduction of the coolant into the coolant passage includes the airflow generated by the movement of the housing-equipped device and the housing-equipped device. At least one of the airflows generated by the fan with the airflow is utilized. If the encased device is a very low speed vehicle, such as a power wheelchair for example, the introduction of coolant into the coolant path will utilize the airflow generated by the fan included in the encased device. When the housing-equipped device is a vehicle or an outboard motor that travels on water and the coolant is water, at least one of the two liquid flows described above is used to introduce the coolant into the coolant passage.

In the present invention and embodiments, the refrigerant flow direction is the direction in which the refrigerant flows. In the present invention and the embodiments, the cross section crossing the coolant flow direction is also the cross section crossing the coolant passage. The cross section is the cross section of the coolant passage. In cross section, the coolant passage is surrounded by the housing wall. The cross-section that traverses the coolant flow direction may be a plane orthogonal or substantially orthogonal to the coolant flow direction. As long as it is not near a branch point or a confluence point, there may be only one direction of refrigerant flow defined for one cross-section of the refrigerant passage. The coolant flow direction may be the direction of the central axis of the coolant passage. Depending on the use of the housing, the coolant flow direction may be switched to the opposite direction.

In the present invention, that the maximum width of the refrigerant passage in a cross section is shorter than the length of the refrigerant passage in the direction of refrigerant flow means that the maximum width of the refrigerant passage in one cross section is shorter than the length of the refrigerant passage in the direction of refrigerant flow. means that The maximum width of the coolant passage in the cross section may be shorter than the length of the coolant passage in the coolant flow direction, regardless of the position of the cross section in the coolant flow direction.
In the present invention and embodiments, the maximum width of the coolant passage in the cross section is the maximum length of a line segment that exists only in the coolant passage in the cross section. A line segment existing only in the coolant passage may overlap with the lattice structure portion.
When the refrigerant passage has branch points and/or confluence points, the refrigerant passage may have a plurality of lengths in the refrigerant flow direction. When the refrigerant passage has a branch point and/or a confluence point, when the maximum width of the refrigerant passage in the cross section is shorter than the length of the refrigerant flow direction of the refrigerant passage, the maximum width of the refrigerant passage in the cross section is It means shorter than the shortest length in the machine direction.

In the present invention and embodiments, the coolant passage may have a flow direction changing portion where the coolant flow direction changes. The fact that the direction of coolant flow changes at the flow direction changing portion means that the direction of coolant flow at the flow direction changing portion is not straight. The change in the flow direction of the refrigerant at the flow direction changing portion may be a change such as a smooth turn or a change such as an angular turn. For example, when the entire refrigerant passage is arc-shaped, the entire refrigerant passage is the flow direction changing portion.
In the present invention and embodiments, the coolant passage may have a cross-sectional change portion in which the cross-sectional area changes. The change in cross-sectional area in the cross-section changing portion means that the cross-sectional area in the cross-sectional changing portion is not constant. The cross-sectional area of the cross-sectional change portion may change continuously or discontinuously. The cross-sectional area of the cross-section changing portion may expand or contract in the coolant flow direction. In the present invention and embodiments, the coolant passage may have a flow direction change portion and a cross section change portion. In this case, at least a portion of the flow direction changing portion may also serve as at least a portion of the cross section changing portion. The coolant passage may have separate flow direction change portions and cross section change portions. In the present invention and the embodiments, the coolant passage may have neither the flow direction change portion nor the cross section change portion.

<Lattice structure>
The lattice structure of the present invention is included in the cooling structure of the present invention. In the case where the cooling structure includes a lattice structure formed so as to be continuous with the housing wall forming the coolant passage, the cooling structure allows the heat generated by the heat source to flow through the coolant flowing through the coolant passage to the housing. It is configured to dissipate heat to the outside. The lattice structure formed so as to be continuous with the housing wall forming the coolant passage may promote heat transfer from the inner surface of the housing wall to the coolant passage. The lattice structure formed so as to be continuous with the outer surface of the housing wall may promote heat dissipation from the housing wall to the outside of the housing wall. The lattice structure formed so as to be continuous with the inner surface of the housing wall may promote heat transfer from the housing space to the housing wall. The material of the lattice structure is not particularly limited. The lattice structure may be integrally molded. The lattice structure may be made of, for example, metal or synthetic resin. The lattice structure may be produced, for example, by additive manufacturing. The lattice structure may be made by metal additive manufacturing. The metal additive manufacturing method may be an additive manufacturing method involving a rapid melting, rapid cooling and solidification process using metallic materials. Specifically, for example, a three-dimensional layered manufacturing method, a thermal spraying method, a laser coating method, a build-up method, and the like. In the additive manufacturing method, which involves a rapid melting, rapid cooling and solidification process, the melting process of rapidly melting metallic materials such as metal powder with laser beams, electron beams, etc., and the solidification process of rapidly cooling and solidifying are repeatedly performed to create a modeled object. is formed. At least a part of the lattice structure and the housing wall may be integrally formed by metal additive manufacturing. When the lattice structure is formed so as to be continuous with the outer surface or inner surface of the housing wall, even if the lattice structure and the outer surface or inner surface of the housing wall are integrally molded by metal additive manufacturing. good. When the lattice structure is not continuous with either the outer surface or the inner surface of the housing wall but is formed so as to be continuous with the housing wall forming the coolant passage, the lattice structure and the housing wall At least a portion may be integrally formed by metal additive manufacturing.

In the present invention and embodiments, the lattice structure consists of a plurality of bar-shaped parts. Therefore, when the lattice structure is formed so as to be continuous with the housing wall forming the coolant passage, the coolant flowing through the coolant passage flows inside the lattice structure. When the lattice structure is formed so as to be continuous with the outer surface or the inner surface of the housing wall, the lattice structure has an edge in a direction orthogonal to the outer surface or the inner surface of the housing wall on which the lattice structure is provided. Fluid can enter and exit from the The fluid may be air, for example. The rod-shaped portion that constitutes the lattice structure may be linear. In the present specification, "each rod-shaped portion" means each of all the rod-shaped portions of the lattice structure. The housing of the present invention may have multiple lattice structures. A plurality of lattice structures may be provided in one coolant passage. For example, a plurality of lattice structures may be arranged side by side in the coolant flow direction in one coolant passage. Two lattice structure portions adjacent to each other in a direction crossing the coolant flow direction may be in contact with each other or may be arranged with a gap therebetween. A plurality of lattice structures may be provided on the outer surface of the housing wall. A plurality of lattice structures may be provided on the inner surface of the housing wall. A lattice structure may be provided on each of the outer surface and the inner surface of the housing wall. However, multiple lattice structures are not provided like fins. That is, a large number of lattice structures may be arranged on the same plane of the housing wall in a straight line at equal intervals, may be arranged radially on the same plane of the housing wall at equal intervals, or may be arranged on the same plane of the housing wall at equal intervals. are not arranged at equal intervals in the circumferential direction of this peripheral surface on the same peripheral surface. The housing may have a lattice structure provided in the coolant passage and a lattice structure provided on the outer surface or the inner surface of the housing wall. The lattice structure formed so as to be continuous with the housing wall forming the coolant passage may promote heat transfer from the housing wall to the coolant passage. The lattice structure formed so as to be continuous with the outer surface of the housing wall may promote heat dissipation from the housing wall to the outside of the housing wall. The lattice structure formed so as to be continuous with the inner surface of the housing wall may promote heat transfer from the housing space to the housing wall. In the present invention and embodiments, the specific surface area of the lattice structure may be the larger specific surface area in the housing.

In the present invention and the embodiments, the expression that the housing wall forming the coolant passage and the lattice structure are formed so as to be continuous means that at least a portion of the housing wall forming the coolant passage and the lattice structure is integrally formed, or the housing wall portion forming the refrigerant passage and the lattice structure portion are in contact with each other. The lattice structure may be integrally molded with a portion of the housing wall and may be in contact with another portion of the housing wall. For example, the lattice structure may be in contact with the parts forming the inner surface of the housing wall and integrally molded with the parts forming the outer surface of the housing wall. When the housing wall forming the coolant passage and the lattice structure contact each other, for example, a part forming the inner surface of the housing wall, a part forming the outer surface of the housing wall, and the lattice structure. are formed, these may be combined to bring the housing wall portion and the lattice structure portion into contact with each other. Further, for example, after the housing wall and the lattice structure are formed, the lattice structure is inserted into the refrigerant passage of the housing wall, thereby bringing the housing wall forming the refrigerant passage into contact with the lattice structure. may When the housing wall forming the coolant passage and the lattice structure contact each other, the housing is preferably configured such that the relative position of the lattice structure with respect to the housing wall forming the coolant passage is fixed. For example, the length of the refrigerant passage in the refrigerant flow direction and the length of the lattice structure in the refrigerant flow direction are substantially the same, and members for restricting the movement of the lattice structure in the refrigerant flow direction are arranged at the inlet and outlet of the refrigerant passage. may be Further, for example, a step that restricts the movement of the lattice structure in the coolant flow direction may be formed in the coolant passage. Further, for example, the housing wall portion and the lattice structure portion may be connected by an adhesive, heat welding, or the like.

In the present invention and the embodiments, forming the outer surface or inner surface of the housing wall and the lattice structure so as to be continuous means that the outer surface or the inner surface of the housing wall and the lattice structure are integrally formed. Molded or otherwise means contact between the outer or inner surface of the housing wall and the lattice structure.
When the outer surface or the inner surface of the housing wall and the lattice structure are integrally molded, both the outer surface and the inner surface of the housing wall and the lattice structure may or may not be integrally molded. It doesn't have to be. When the outer surface or inner surface of the housing wall and the lattice structure are integrally formed, the entire housing wall and the lattice structure may be formed by one part. When the outer surface or the inner surface of the housing wall and the lattice structure are integrally formed, a part of the housing wall and the lattice structure are formed by one part, and this part and the housing wall are formed. may be connected to another component that constitutes the
A part forming at least a portion of the housing wall and the lattice structure may be connected when the outer surface or the inner surface of the housing wall and the lattice structure are in contact. The housing is preferably configured such that the relative position of the lattice structure with respect to the housing wall is fixed when the lattice structure contacts the outer or inner surface of the housing wall. For example, a member that restricts movement of the lattice structure with respect to the housing wall may be arranged on the housing wall. Also, for example, the lattice structure may be connected to the outer surface or the inner surface of the housing wall by adhesive, heat welding, or the like.

In the present invention, multiple Delaunay points or multiple generating points (virtual points) are randomly distributed in three dimensions. Random distribution of a plurality of points means that the points are distributed without periodic regularity. For example, when a plurality of Delaunay points included in a portion of the lattice structure are arranged at regular intervals, the plurality of Delaunay points are not randomly distributed. Further, for example, when the lattice structure is viewed in a certain direction and all of the plurality of Delaunay points included in a portion of the lattice structure are arranged on a plurality of parallel straight lines, the plurality of Delaunay points are randomly distributed. not

In the present invention and embodiments, a three-dimensional Delaunay diagram is a diagram obtained by Delaunay triangulation of a three-dimensional space based on a plurality of Delaunay points. The Delaunay triangulation connects two Delaunay points with a line segment. This segment is called a Delaunay edge. A Delaunay pyramid is a pyramid formed by six Delaunay sides. Since the plurality of Delaunay points are randomly distributed in the present invention, the shape and size of the plurality of Delaunay pyramids in the Delaunay diagram are irregular. The Delaunay diagram has the geometric feature that it has no Delaunay points in the circumsphere of the Delaunay triangular pyramid.

In the present invention and embodiments, a three-dimensional Voronoi diagram is a diagram obtained by performing Voronoi division of a three-dimensional space based on a plurality of generating points. A Voronoi polyhedron is a polyhedron formed by a three-dimensional Voronoi tessellation. In the present invention and the embodiments, a Voronoi boundary surface is a surface forming a Voronoi polyhedron and is a perpendicular bisector of a line segment connecting two generating points. The three-dimensional Voronoi diagram includes a Voronoi polyhedron formed only by the Voronoi boundary surfaces and a Voronoi polyhedron formed by the Voronoi boundary surfaces and the end surfaces of the three-dimensional space to be divided. In the present invention, multiple generating points are randomly distributed, so the number of faces, shapes, and sizes of multiple Voronoi polyhedrons in the Voronoi diagram are irregular. A Voronoi diagram has a geometric feature that a Voronoi polyhedron composed only of Voronoi boundary surfaces is a convex polyhedron.

The Delaunay lattice structure consists of a plurality of first rods forming a plurality of Delaunay sides. In the present invention and embodiments, a plurality of first rod-shaped portions forming a plurality of Delaunay sides means that each of the plurality of first rod-shaped portions forms at least part of a Delaunay side. At least one end of each first rod-shaped portion is connected to another first rod-shaped portion at the Delaunay point.
The Voronoi lattice structure consists of a plurality of first rod-shaped portions forming sides of a plurality of Voronoi polyhedra formed only by Voronoi interfaces. In the present invention and embodiments, a plurality of Voronoi polyhedrons formed only by Voronoi interfaces means a plurality of Voronoi polyhedrons respectively formed by a plurality of Voronoi interfaces. In the present invention and the embodiments, the plurality of first rod-shaped portions forming the sides of the plurality of Voronoi polyhedrons formed only by Voronoi boundary surfaces means that each of the plurality of first rod-shaped portions is formed only by a plurality of Voronoi boundary surfaces. forming at least part of one side of one Voronoi polyhedron formed by At least one end of each first rod-shaped portion is connected to another first rod-shaped portion. The maximum number of other first rod-shaped parts connected to the end of one first rod-shaped part is three. No generatrix in the Voronoi diagram exists on the first bar. Therefore, generating points in the Voronoi diagram are virtual points that do not physically exist.
In this specification, "each first rod-shaped part" means each of all the first rod-shaped parts of the Delaunay lattice structure or the Voronoi lattice structure.

In the present invention and embodiments, the Delaunay lattice structure comprises two or more Delaunay triangular pyramids each having four Delaunay points, each of which has four Delaunay points formed by the connecting points of the first rod-shaped parts. formed to pass through In the present invention and embodiments, the Voronoi lattice structure is such that three mutually orthogonal line segments each pass through two or more Voronoi polyhedrons having only vertices formed by connecting points between the first rod-shaped portions. It is formed. A Voronoi polyhedron having only vertices formed by connecting points between the first rod-shaped portions is a Voronoi polyhedron formed only by Voronoi boundary surfaces. Three line segments orthogonal to each other are arbitrary line segments. Three line segments orthogonal to each other are virtual line segments. When the cooling structure includes a lattice structure formed so as to be continuous with the housing wall forming the coolant passage, for example, two of the three line segments orthogonal to each other are included in one cross section. may A line segment included in the cross section is a line segment included in the cross section without intersecting the cross section. A line segment included in the cross section is a line segment that exists entirely within the refrigerant passage. When the cooling structure includes a lattice structure formed so as to be continuous with the outer surface or the inner surface of the housing wall, for example, any one or two of the three line segments orthogonal to each other It may be parallel to the outer surface or the inner surface of the housing wall that is continuous with the lattice structure.

In the present invention and the embodiments, the first rod-shaped portion formed so as to be continuous with the housing wall portion means that the first rod-shaped portion and at least a portion of the housing wall portion are integrally molded, or , means that the first rod portion and the housing wall portion are in contact with each other.

In the present invention and the embodiment, when the lattice structure has a plurality of second rod-shaped portions, the plurality of second rod-shaped portions include second rod-shaped portions formed so as to be continuous with the housing wall portion. All of the plurality of second rod-shaped portions may be formed so as to be continuous with the housing wall portion. The second rod-shaped portion formed so as to be continuous with the housing wall portion means that the second rod-shaped portion and at least a part of the housing wall portion are integrally molded, or that the second rod-shaped portion and the housing It means that the walls touch. When the lattice structure has a plurality of second rods, the plurality of second rods are directly connected to the ends of the first rods forming one Delaunay point or one vertex of the Voronoi polyhedron. Includes 2 rods. All of the plurality of second rod-shaped portions may be directly connected to ends of the plurality of first rod-shaped portions. One Delaunay point or one vertex of the Voronoi polyhedron is formed by connecting points of a plurality of first rod-shaped parts. Therefore, when the second rod-shaped portion is directly connected to the ends of the first rod-shaped portions, the second rod-shaped portion is directly connected to the ends of the plurality of first rod-shaped portions. The maximum length of the plurality of second rod-shaped portions may be less than or equal to the maximum length of the plurality of first rod-shaped portions.

In the present invention and the embodiments, the shortest distance between the end of the first rod-shaped portion to which the second rod-shaped portion is connected and the housing wall portion means that the second rod-shaped portion among the plurality of first rod-shaped portions is connected. When the number of the first rod-shaped portions connected is plural, it means the shortest distance among the shortest distances between the ends of the plurality of first rod-shaped portions to which the second rod-shaped portions are connected and the housing wall portion. In addition, in the present invention and the embodiment, the number of the first rod-shaped portion to which the second rod-shaped portion is connected among the plurality of first rod-shaped portions may be one.

In the present invention and embodiments, a Voronoi boundary surface surrounded by a plurality of first rod-shaped portions means that a plurality of sides forming one Voronoi boundary surface are all formed of the first rod-shaped portions. . In the present invention and the embodiments, the two generating points positioned on both sides of the Voronoi boundary surface are two generating points such that the perpendicular bisector of the line segment connecting the two generating points is the Voronoi boundary surface. means a point.

In the present invention, the expression that the length of the lattice structure in the coolant flow direction is longer than the maximum width of the coolant passage in a cross section passing through the lattice structure means that the maximum width of the coolant passage in one cross section is equal to that of the lattice structure. It means that it is shorter than the length of the part in the refrigerant flow direction. Regardless of the position of the cross section in the coolant flow direction, the maximum width of the coolant passage in the cross section may be shorter than the length of the lattice structure in the coolant flow direction.
In the present invention, the phrase that the length of the lattice structure in the refrigerant flow direction is longer than the circumferential length of the refrigerant passage in a cross section passing through the lattice structure means that the circumferential length of the refrigerant passage in a certain cross section is equal to that of the lattice structure. It means that it is shorter than the length of the part in the refrigerant flow direction. The circumferential length of the coolant passage in the cross section may be shorter than the length of the lattice structure in the coolant flow direction regardless of the position of the cross section in the coolant flow direction.
In the present invention and embodiments, the circumferential length of the coolant passage in the cross section means the circumferential length of the outer circumferential surface of the refrigerant passage when the refrigerant passage has an outer circumferential surface and an inner circumferential surface.
If the coolant passages have branch points and/or junctions, the lattice structure may also have branch points and/or junctions. If the lattice structure has branch points and/or confluences, the lattice structure may have a plurality of lengths in the coolant flow direction. When the lattice structure has branch points or confluences, the fact that the length of the lattice structure in the coolant flow direction is longer than the maximum width or the circumferential length of the coolant passage in the cross section passing through the lattice structure means that the lattice structure is It means that the maximum length of the lattice structure in the coolant flow direction is longer than the maximum width or circumference of the coolant passage in the cross section passing through.
In the present invention, the term "lattice structure" means that a plurality of unit cells are connected so that the length of the lattice structure in the coolant flow direction is longer than the maximum width or circumferential length of the coolant passage in the cross section passing through the lattice structure. A plurality of unit cells having a length in the refrigerant flow direction shorter than that of the lattice structure is arranged so that the length of the lattice structure in the refrigerant flow direction is longer than the maximum width or circumference of the refrigerant passage in a cross section passing through the lattice structure. means connected. A plurality of unit cells may be connected in the coolant flow direction such that the length of the lattice structure in the coolant flow direction is longer than the maximum width or circumference of the coolant passage in the cross section passing through the lattice structure.

The lattice structure of the present invention has a portion of the housing wall, the lattice structure, and the housing wall in each direction of two mutually orthogonal line segments included in a first cross section that traverses the coolant flow direction. It may be formed so as to be continuous with another part. The direction of the line segment included in the first cross section is not only parallel to the line segment included in the first cross section, but also the direction coaxial with this line segment. The direction of a line segment included in the first cross-section is a linear direction included in the first cross-section without crossing the first cross-section. The definition of the first cross section across the refrigerant flow direction is the same as the definition of the cross section described above. A portion of the housing wall portion, the lattice structure portion, and another portion of the housing wall portion are formed so as to be continuous in each of the directions of two mutually orthogonal line segments included in the first cross section, A portion of the housing wall portion, the lattice structure portion, and the other portion of the housing wall portion are formed so as to be continuous in each of directions of two line segments that are included in one first cross section and are orthogonal to each other. means that A portion of the housing wall portion, the lattice structure portion, and the other portion of the housing wall portion are formed so as to be continuous in each of directions of two mutually orthogonal line segments included in each of the plurality of first cross sections. may
Meaning that a portion of the housing wall portion, the lattice structure portion, and the other portion of the housing wall portion are formed so as to be continuous in each of the directions of the two line segments that are included in the first cross section and are orthogonal to each other. In order to facilitate understanding of the above, the case where a portion of the housing wall portion, the lattice structure portion, and another portion of the housing wall portion are formed so as to be continuous in the direction of the first line segment included in the first cross section explain. A portion of the housing wall portion, the lattice structure portion, and the other portion of the housing wall portion are aligned on a first straight line including the first line segment in the first cross section. On a second straight line parallel to the first straight line, a portion of the housing wall and the rod-shaped portion of the lattice structure are formed so as to be continuous. A portion of the housing wall portion and the rod-shaped portion of the lattice structure are formed so as to be continuous means that a portion of the housing wall portion and the rod-shaped portion of the lattice structure are formed integrally, or the housing wall portion is in contact with the rod-like portion of the lattice structure. The second straight line may or may not be included in the first cross-section. In other words, the portion where the portion of the housing wall and the rod-like portion of the lattice structure are continuous may or may not be included in the first cross section. On a third straight line parallel to the first straight line, another part of the housing wall and the rod-shaped portion of the lattice structure are formed so as to be continuous. The meaning of the fact that the other portion of the housing wall and the rod-like portion of the lattice structure are formed to be continuous is the same as described above. The third straight line may or may not be included in the first cross-section. In other words, the portion where the other portion of the housing wall and the rod-like portion of the lattice structure are continuous may or may not be included in the first cross section. Both the portion where the portion of the housing wall and the rod-shaped portion of the lattice structure are continuous and the portion where the other portion of the housing wall and the rod-shaped portion of the lattice structure are continuous are included in the first cross section. may The second straight line may be the same as or different from the first straight line. The third straight line may be the same as or different from the first straight line. The third straight line may be the same as or different from the second straight line.

In the present invention, when the housing wall portion forming the coolant passage and the lattice structure portion are formed so as to be continuous, the minimum or maximum width of the lattice structure portion or the coolant passage in the thickness direction of the housing wall portion is The dimensions may be as follows. At least one of the shortest distance from the inner surface of the housing wall to the coolant passage in the thickness direction of the housing wall and the longest distance from the outer surface of the housing wall to the coolant passage in the thickness direction of the housing wall is It may be smaller than the minimum width of the lattice structure or coolant passage in the thickness direction of the housing wall. The shortest distance from the inner surface of the housing wall to the coolant passage in the thickness direction of the housing wall may be smaller than the minimum width of the lattice structure or the coolant passage in the thickness direction of the housing wall. The shortest distance from the outer surface of the housing wall to the coolant passage in the thickness direction of the housing wall may be smaller than the minimum width of the lattice structure or the coolant passage in the thickness direction of the housing wall. Both the shortest distance from the inner surface of the housing wall to the refrigerant passage in the thickness direction of the housing wall and the longest distance from the outer surface of the housing wall to the refrigerant passage in the thickness direction of the housing wall are It may be smaller than the minimum width of the lattice structure or coolant passage in the thickness direction of the body wall. The longest distance from the inner surface of the housing wall to the coolant passage in the thickness direction of the housing wall may be smaller than the maximum width of the lattice structure or the coolant passage in the thickness direction of the housing wall. It can be bigger or the same. The longest distance from the outer surface of the housing wall to the coolant passage in the thickness direction of the housing wall may be smaller than the maximum width of the lattice structure or the coolant passage in the thickness direction of the housing wall. It can be bigger or the same. The thickness direction of the housing wall is the direction in which the outer surface and the inner surface of the housing wall are aligned. In other words, the thickness direction of the housing wall is the direction from the inner surface to the outer surface of the housing wall.

At least a portion of the refrigerant passage in the refrigerant flow direction is provided with a first passage portion provided with at least a portion of the lattice structure portion, and a lattice structure portion aligned in a direction intersecting the first passage portion with the refrigerant flow direction. and a second passage portion that is not closed. The second passage portion and the first passage portion may be arranged in a direction orthogonal to the coolant flow direction. If the coolant passage has a first passage portion and a second passage portion, coolant is movable from the lattice structure to the second passage portion of the coolant passage and from the second passage portion of the coolant passage to the lattice structure. is. In the present invention and the embodiments, a line segment included in the first passage portion is a line segment that exists wholly in the first passage portion.

In the Delaunay lattice structure part of the present invention, two mutually orthogonal line segments included in the second cross section crossing the flow direction changing part each define four Delaunay points formed by connection points between the first rod-shaped parts. It may be formed through two or more Delaunay pyramids each having one. In the Voronoi lattice structure part of the present invention, each of two mutually orthogonal line segments included in the second cross section crossing the flow direction changing part has only vertexes formed by connecting points between the first rod-shaped parts. It may be formed through one or more Voronoi polyhedra. The definition of the flow direction change section is as described above. The definition of the second cross-section is the same as the definition of the cross-section described above. Two mutually orthogonal line segments included in the second cross section passing through two or more Delaunay triangular pyramids or Voronoi polyhedrons means that two mutually orthogonal line segments included in one second cross section are , means passing through two or more Delaunay pyramids or Voronoi polyhedra. The Delaunay lattice structure has two or more two or more Delaunay points, each of which is included in each of the plurality of second cross sections and has four Delaunay points formed by connection points between the first rod-shaped portions. It may be formed so as to pass through the Delaunay triangular pyramid. The Voronoi lattice structure has two or more Voronoi polyhedrons, each of which includes two mutually orthogonal line segments included in each of the plurality of second cross sections and has only vertices formed by connecting points between the first rod-shaped portions. may be formed to pass through.

In the Delaunay lattice structure of the present invention, two mutually orthogonal line segments included in the third cross section crossing the cross-section changing portion each define four Delaunay points formed by connection points between the first rod-shaped portions. It may be formed through two or more Delaunay triangular pyramids. In the Voronoi lattice structure part of the present invention, two mutually orthogonal line segments included in a third cross section that passes through the cross-section changing part and traverses the coolant flow direction are vertexes formed by connecting points between the first rod-shaped parts. may be formed through more than one Voronoi polyhedron with only The definition of the cross-section changing portion is as described above. The definition of the third cross-section is the same as the definition of the cross-section described above. Two mutually orthogonal line segments included in the third cross section passing through two or more Delaunay triangular pyramids or Voronoi polyhedrons means that two mutually orthogonal line segments included in one third cross section are , means passing through two or more Delaunay pyramids or Voronoi polyhedra. The Delaunay lattice structure has two or more two or more Delaunay points in which two mutually orthogonal line segments included in each of the plurality of third cross sections each have four Delaunay points formed by connection points between the first rod-shaped portions. It may be formed so as to pass through the Delaunay triangular pyramid. The Voronoi lattice structure has two or more Voronoi polyhedrons, each of which includes two mutually orthogonal line segments included in each of the plurality of third cross sections and has only vertices formed by connecting points between the first rod-shaped portions. may be formed to pass through.

When the housing cooling structure of the present invention has a lattice structure formed so as to be continuous with the outer surface or the inner surface of the housing wall, the lattice structure on the outer surface or the inner surface of the housing wall is Looking at the lattice structure in a direction orthogonal to the provided area, the length of any line segment within the lattice structure that is orthogonal to the longest line segment within the lattice structure is greater than the first width. The first width is the maximum width in the thickness direction of the housing wall of the lattice structure. The maximum width of the lattice structure in the thickness direction of the housing wall is the maximum length of a line segment that is on a straight line along the thickness direction of the housing wall and fits in the lattice structure. The definition of the thickness direction of the housing wall portion is as described above. Viewing the lattice structure in a direction perpendicular to the area where the lattice structure is provided on the outer surface or inner surface of the housing wall, whichever fits in the lattice structure that is perpendicular to the longest line segment that fits in the lattice structure The length of the line segment may be at least twice the first width.

In the present invention, when the outer surface or inner surface of the housing wall and the lattice structure are formed so as to be continuous, the width of the lattice structure in the thickness direction of the housing wall may be as follows. good. The maximum width of the lattice structure in the thickness direction of the housing wall may be greater than the minimum thickness of the housing wall. The minimum width of the lattice structure in the thickness direction of the housing wall may be greater than the minimum thickness of the housing wall. The definition of the thickness direction of the housing wall portion is as described above. The thickness of the housing wall is the shortest distance between the outer surface and the inner surface of the housing wall. The minimum thickness of the housing wall may be the thickness of the portion of the housing wall where the lattice structure is provided, or the thickness of the portion of the housing wall where the lattice structure is not provided.

In the present invention and this specification, at least one (one) of a plurality of options includes all conceivable combinations of the plurality of options. At least one (one) of the multiple options may be any one of the multiple options, or may be all of the multiple options. For example, at least one of A, B and C may be A only, B only, C only, A and B, A and C There may be, it may be B and C, or it may be A, B and C.
In the present invention and herein, A and/or B means that it can be A, it can be B, and it can be both A and B.

If a claim does not explicitly specify the number of an element and that element appears in the singular when translated into English, the invention may include a plurality of that element. good. Also, the invention may have only one of this component.

It should be noted that, as used in the present invention and embodiments, the terms including, having, comprising and derivatives thereof are intended to encompass additional items in addition to the recited items and their equivalents. is intended and used.

Unless defined otherwise, all terms (including technical and scientific terms) used in the specification and claims have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be construed to have a meaning consistent with their meaning in the context of the relevant technology and this disclosure, and are not idealized or overly formal. not be interpreted in any meaningful way.

In this specification, the term "may (can be)" is non-exclusive. "May be (may be)" means "may be (may be) but is not limited to". In this specification, "may (may)" implicitly includes "may not (may not)". In this specification, the configuration described as "may be (may be)" has at least the above effect obtained by the configuration of claim 1.

Before describing embodiments of the present invention in detail, it should be understood that the present invention is not limited to the details of construction and arrangement of components set forth in the following description or illustrated in the drawings. The present invention is also possible in embodiments other than those described below. The present invention is also possible in embodiments in which various modifications are made to the embodiments described later.

According to the housing-equipped device of the present invention, it is possible to improve the cooling performance of the housing while suppressing an increase in the size of the housing-equipped device, or to improve the shape of the housing-equipped device while ensuring the cooling performance of the housing. design freedom can be improved.

FIGS. 1(a) to 1(h) are diagrams for explaining the housing provided apparatus according to the first embodiment of the present invention. FIG. 2 is a two-dimensional Delaunay diagram and also a two-dimensional Voronoi diagram. 3(a) to 3(c) are diagrams schematically showing a part of the lattice structure part of the housing of the second embodiment of the present invention. 4(a) to 4(e) are diagrams schematically showing a portion of the lattice structure of the housing of the third embodiment of the present invention. FIG. 5 is a cross-sectional view of part of the housing of the fifth embodiment of the present invention. 6(a) and 6(c) are cross-sectional views of a portion of the housing of the sixth embodiment of the present invention. 6(b) is a cross-sectional view taken along line AA in FIG. 6(a), and FIG. 6(d) is a cross-sectional view taken along line AA in FIG. 6(c). FIG. 7(a) is a cross-sectional view of a portion of a housing according to a seventh embodiment of the present invention, and FIG. 7(b) is a cross-sectional view taken along line BB of FIG. 7(a). FIG. 7(c) is a cross-sectional view of a portion of the housing of the eighth embodiment of the present invention, and FIG. 7(d) is a cross-sectional view taken along line CC of FIG. 7(c). 8(a) to 8(c) are sectional views of a housing according to a ninth embodiment of the present invention. 9(a) is a perspective view of a part of the housing of FIGS. 8(a) to 8(c), and FIG. 9(b) is a housing of FIGS. 8(a) to 8(c). 8(a) to 8(c) as viewed in the vertical direction of the paper surface. 10A is a cross-sectional view of the housing of Modification 1 of the ninth embodiment, FIG. 10B is a cross-sectional view of the housing of Modification 2 of the ninth embodiment, and FIG. (c) is a cross-sectional view of a housing of Modification 3 of the ninth embodiment. FIG. 11(a) is a cross-sectional view of a housing according to a tenth embodiment of the present invention, FIG. 11(b) is a cross-sectional view taken along line DD of FIG. 11(a), and FIG. 11(c). 11(a) is a cross-sectional view taken along line EE of FIG. 11(a). FIG. 12(a) is a cross-sectional view of the housing of the eleventh embodiment of the present invention, and FIG. 12(b) is a perspective view of the housing of the eleventh embodiment of the present invention.

<First embodiment>
A housing providing device 100 according to a first embodiment of the present invention will be described with reference to FIGS. 1(a) to 1(h). 1(a) to 1(c) show three examples of the housing 1 of the first embodiment. A housing 1 houses contents 2 including a heat source 3 . 1(a) to 1(c) show cross sections of the housing 1 and the contents 2. FIG. 1(a) to 1(c), the housing 1 is arranged inside the housing-equipped device 100, but at least a part of the outer surface of the housing 1 is located inside the housing-equipped device 100. It may be exposed to the outside. The housing 1 and the contents 2 are not limited to those shown in FIGS. 1(a) to 1(c). The housing 1 has a housing wall portion 5 forming a housing space 4 for housing a content 2 including a heat source 3 . The housing 1 has a cooling structure in which heat generated by the heat source 3 is radiated to the outside of the housing 1 . The cooling structure is formed to be continuous with the outer surface 6 or the inner surface 7 of the housing wall 5, or is not continuous with either the outer surface 6 or the inner surface 7 of the housing wall 5, and the coolant It includes a lattice structure portion 20 formed so as to be continuous with the housing wall portion 5 forming the coolant passage 10 through which the refrigerant flows.

In FIG. 1(a), the lattice structure 20 is not continuous with either the outer surface 6 or the inner surface 7 of the housing wall portion 5, but is continuous with the housing wall portion 5 forming the coolant passage 10 through which the coolant flows. Here is an example formed as follows: A coolant passage 10 is formed between an outer surface 6 and an inner surface 7 of the housing wall portion 5 . The refrigerant passage 10 is formed such that the maximum width _WP of the refrigerant passage 10 in a cross section across the refrigerant flow direction _F is shorter than the length LP of the refrigerant passage 10 in the refrigerant flow direction F. In FIG. 1A, the coolant flow direction F is straight from one end to the other end of the coolant passage 10 . However, the refrigerant passage 10 is not limited to such a shape.

FIG. 1(b) shows an example in which the lattice structure 20 is formed so as to be continuous with the outer surface 6 of the housing wall 5. As shown in FIG. FIG. 1(c) shows an example in which the lattice structure portion 20 is formed so as to be continuous with the inner surface 7 of the housing wall portion 5. As shown in FIG. Although the lattice structure 20 is provided on the flat outer surface 6 in the example of FIG. 1B, it may be provided on the circular outer surface 6 . In the example of FIG. 1(c), the lattice structure 20 has a semi-cylindrical shape and is provided on the circumferential inner surface 7, but it may be provided on the flat inner surface 7 as well. The maximum width in the thickness direction of the housing wall portion 5 of the lattice structure portion 20 formed so as to be continuous with the outer surface 6 or the inner surface 7 of the housing wall portion 5 is defined as the width _WL . When the lattice structure 20 is viewed in the X direction perpendicular to the region where the lattice structure 20 is provided on the outer surface 6 or the inner surface 7 of the housing wall 5, the longest of the plurality of line segments that fit in the lattice structure 20 Let the line segment be a line segment SL _X. The X direction is an arbitrary direction perpendicular to the region of the outer surface 6 or the inner surface 7 of the housing wall 5 where the lattice structure is provided. FIG. 1(d) is a view of the lattice structure 20 of FIG. 1(c) viewed in the X direction shown in FIG. 1(c). When the lattice structure 20 is viewed in the X direction orthogonal to the region where the lattice structure 20 is provided on the outer surface 6 or the inner surface 7 of the housing wall 5, among the plurality of line segments that fit in the lattice structure 20, the line Let any line segment perpendicular to the segment SLx be a line segment SL1. The lattice structure portion 20 formed so as to be continuous with the outer surface 6 or the inner surface 7 of the housing wall portion 5 is formed such that the length _L1 of the line segment SL1 is longer than the width WL. Although the view of the lattice structure portion 20 in FIG. 1(b) in the X direction is omitted, the length _L1 of the line segment SL1 is also greater than the width WL in the lattice structure portion 20 of FIG. 1(b). is designed to be longer.

The lattice structure 20 includes a Delaunay lattice structure 30 or a Voronoi lattice structure 40 . FIG. 1( e ) shows a portion of an example of the Delaunay lattice structure 30 , and FIG. 1( f ) shows a portion of an example of the Voronoi lattice structure 40 . The Delaunay lattice structure 30 and the Voronoi lattice structure 40 are not limited to those shown in FIGS. 1(e) and 1(f). The lattice structure portion 20 is composed of a plurality of rod-shaped portions 21 .

The Delaunay lattice structure 30 consists of a plurality of first rod-shaped parts 22 . The plurality of first rod-shaped portions 22 forming the Delaunay lattice structure 30 form a plurality of Delaunay sides 32 in a three-dimensional Delaunay diagram based on a plurality of Delaunay points 31 randomly distributed in three dimensions. FIG. 1(e) shows a part of the Delaunay lattice structure 30 existing in the rectangular parallelepiped space T1. FIG. 1(g) shows all the Delaunay points 31 existing in the same space T1 as in FIG. . The Delaunay triangular pyramid 33 is a triangular pyramid formed by six Delaunay sides 32 . The Delaunay lattice structures 30 are two or more Delaunay triangular pyramids each having four Delaunay points 31 formed by connecting points between the first rod-shaped portions 22 at three line segments S1, S2, and S3 orthogonal to each other. 33 is formed. Line segments S1, S2, and S3 are not limited to those shown in FIG.

The Voronoi lattice structure part 40 consists of a plurality of first rod-shaped parts 22 . The plurality of first rod-shaped portions 22 constituting the Voronoi lattice structure portion 40 are formed only by the Voronoi boundary surfaces 42 in a three-dimensional Voronoi diagram with a plurality of virtual points 41 randomly distributed in three dimensions as generating points. form the edges of the Voronoi polyhedron 43 of . FIG. 1(f) shows a portion of the Voronoi lattice structure 40 existing in the rectangular parallelepiped space T2. FIG. 1(h) shows all generating points 41 existing in the same space T2 as in FIG. 1(f) and one Voronoi polyhedron 43 among a plurality of Voronoi polyhedrons 43 existing in the space T2. A Voronoi polyhedron 43 shown in FIG. In FIG. 1(h), one of the plurality of Voronoi interfaces 42 forming the Voronoi polyhedron 43 is hatched. The Voronoi lattice structure part 40 is arranged such that three line segments S1, S2, and S3 perpendicular to each other pass through two or more Voronoi polyhedrons 43 having only vertices formed by connecting points between the first rod-shaped parts 22, respectively. It is formed. The line segments S1, S2, and S3 are not limited to those shown in FIG. 1(h).

Since the housing 1 of the first embodiment has such a lattice structure 20, the housing-equipped device 100 can improve the cooling performance of the housing 1 while suppressing the enlargement of the housing-equipped device 100. Alternatively, the degree of freedom in designing the shape of the housing-equipped device 100 can be improved while ensuring the cooling performance of the housing 1 .

In FIG. 1A, the length of the lattice structure portion 20 in the refrigerant flow direction _F is the same as the length LP of the refrigerant passage 10 in the refrigerant flow direction F, but the lattice structure portion 20 in the refrigerant flow direction The length _F may be shorter than the length LP in the coolant flow direction F of the coolant passage 10 . The length of the lattice structure portion 20 in the coolant flow direction F may be longer than the maximum width _WP of the coolant passage 10 in the cross section passing through the lattice structure portion 20 . The length of the lattice structure portion 20 in the coolant flow direction F may be equal to or less than the maximum width _WP of the coolant passage 10 in the cross section passing through the lattice structure portion 20 . The length of the lattice structure portion 20 in the coolant flow direction F may be longer than the circumferential length of the coolant passage 10 in the cross section passing through the lattice structure portion 20 . The length of the lattice structure portion 20 in the coolant flow direction F may be less than or equal to the circumferential length of the coolant passage 10 in the cross section passing through the lattice structure portion 20 .

When the lattice structure 20 is provided in the coolant passage 10 , the housing-equipped device 100 introduces the gas or liquid around the housing-equipped device 100 as a coolant into the coolant passage 10 , and after passing through the coolant passage 10 . of refrigerant to the surroundings of the enclosure-equipped device 100 . The housing-equipped device 100 does not have a radiator for cooling the coolant after passing through the coolant passage 10 . When the lattice structure portion 20 is provided in the coolant passage 10, the lattice structure portion 20 may be integrally formed with at least a portion of the housing wall portion 5 by metal additive manufacturing. When the lattice structure 20 is formed so as to be continuous with the outer surface 6 or the inner peripheral surface 7 of the housing wall 5 , the lattice structure 20 is metal-laminated with the outer surface 6 or the inner surface 7 of the housing wall 5 . It may be integrally formed by a molding method.

For understanding of the 3D Delaunay diagram and the 3D Voronoi diagram, Fig. 2 shows a 2D Delaunay diagram DD and a 2D Voronoi diagram VD. The Delaunay diagram DD and the Voronoi diagram VD have a dual relationship, and the generating point P of the Voronoi diagram VD becomes the Delaunay point P of the Delaunay diagram DD. In a two-dimensional Voronoi diagram VD, a two-dimensional space R is divided into a plurality of Voronoi regions VR. The plurality of Voronoi regions VR are divided into two dimensions: a Voronoi region VR surrounded only by the perpendicular bisector of a line segment connecting two generating points P, a perpendicular bisector of a line segment connecting two generating points P, and two-dimensional and a Voronoi region VR surrounded by the edge of the space R. The perpendicular bisectors forming the Voronoi region VR are called Voronoi boundaries VE. In the three-dimensional Voronoi diagram of the first embodiment, the three-dimensional space is divided into a plurality of Voronoi polyhedra. The plurality of Voronoi polyhedrons are a Voronoi polyhedron 43 surrounded only by perpendicular bisectors of lines connecting two generating points 41, and a perpendicular bisector of lines connecting two generating points 41 and a three-dimensional space. and a Voronoi polyhedron bounded by the end faces of . The Voronoi boundary surface 42 is a perpendicular bisector of a line segment connecting two generating points 41 . A Delaunay edge DE in the two-dimensional Delaunay diagram DD is a line segment connecting two generating points P in two Voronoi regions VR adjacent to each other via one Voronoi region VR. A Delaunay edge 32 in the three-dimensional Delaunay diagram of the first embodiment is a line connecting two generating points in two Voronoi polyhedrons adjacent to each other via one Voronoi boundary surface in a Voronoi diagram dual to the Delaunay diagram. minutes.

<Second embodiment>
The housing 1 provided in the housing providing apparatus 100 according to the second embodiment of the present invention will be described with reference to FIGS. 3(a) to 3(c). The second embodiment has the configuration of the first embodiment. FIGS. 3(a)-3(c) are merely examples of the second embodiment. 3(a) to 3(c) each schematically show a portion of the Delaunay lattice structure 30. FIG. Illustration of the Voronoi lattice structure 40 of the second embodiment is omitted. In the Delaunay lattice structure 30 or the Voronoi lattice structure 40 , some of the plurality of first rod-shaped portions 22 are formed so as to be continuous with the housing wall portion 5 . The end of the first rod-shaped portion 22 forming part of the Delaunay side 32 or part of the side of the Voronoi polyhedron 43 may be formed so as to be continuous with the housing wall portion 5 (see, for example, FIG. 3A). ). Also, the connection point between the first rod-shaped portions 22 may be formed so as to be continuous with the housing wall portion 5 (see, for example, FIGS. 3(b) and 3(c)). Also, the first rod-shaped portion 22 may be formed so as to be continuous with the housing wall portion 5 along the longitudinal direction of the first rod-shaped portion 22 (see, for example, FIG. 3(c)).

<Third Embodiment>
The housing 1 included in the housing providing device 100 of the third embodiment of the present invention will be described with reference to FIGS. 4(a) to 4(e). The third embodiment has the configuration of the first embodiment. The third embodiment may or may not have the configuration of the second embodiment. FIGS. 4(a)-4(e) are merely examples of the third embodiment. 4(a) and 4(b) each schematically show a portion of the lattice structure 20 including the Delaunay lattice structure 30. FIG. 4(c) to 4(e) each schematically show a portion of the lattice structure 20 including the Voronoi lattice structure 40. FIG. The plurality of rod-shaped portions 21 forming the lattice structure portion 20 includes a plurality of second rod-shaped portions 23 in addition to the plurality of first rod-shaped portions 22 forming the Delaunay lattice structure portion 30 or the Voronoi lattice structure portion 40 . The plurality of second rod-shaped portions 23 are connected to the end of the first rod-shaped portion 22 forming one Delaunay point 31 or one vertex of the Voronoi polyhedron 43, at least one second rod-shaped portion 23, and the housing wall portion 5. provided to be formed as The second rod-shaped portion 23 is the rod-shaped portion 21 that originally forms the Delaunay side 32 or the side of the Voronoi polyhedron 43, but cannot be specified from the lattice structure portion 20 whether it forms the Delaunay side 32 or the side of the Voronoi polyhedron 43. good too.

The lattice structure 20 is formed by continuously forming the end of the first rod-shaped portion 22 forming one Delaunay point 31 or one vertex of the Voronoi polyhedron 43, one second rod-shaped portion 23, and the housing wall portion 5. It may also have a first portion 24 (see, eg, FIGS. 4(a) and 4(c)). The lattice structure portion 20 is formed by connecting the end of the first rod-shaped portion 22 forming one Delaunay point 31 or one vertex of the Voronoi polyhedron 43, the plurality of second rod-shaped portions 23, and the housing wall portion 5. second portion 25 (see, eg, FIGS. 4(b), 4(d), and 4(e)). Lattice structure 20 may have both first portion 24 and second portion 25 . The lattice structure 20 may have only the first portion 24 or only the second portion 25 out of the first portion 24 and the second portion 25 . When the lattice structure 20 includes the Delaunay lattice structure 30, the second portion 25 includes one second rod-shaped portion 23 directly connected to the end of the first rod-shaped portion 22 forming one Delaunay point 31. , is directly connected to at least one second rod-like portion 23 formed continuously with the housing wall portion 5 (see, for example, FIG. 4(b)). When the lattice structure portion 20 includes the Voronoi lattice structure portion 40, in the second portion 25, one second rod-shaped portion directly connected to the end of the first rod-shaped portion 22 forming one vertex of the Voronoi polyhedron 43. 23 may be directly connected to at least one second rod-like portion 23 formed continuously with the housing wall portion 5 (see, for example, FIG. 4(d)). When the lattice structure portion 20 includes the Voronoi lattice structure portion 40 , in the second portion 25 , the ends of the first rod-shaped portions 22 forming one vertex of the Voronoi polyhedron 43 are directly connected to the plurality of second rod-shaped portions 23 . (see, for example, FIG. 4(e)).

When the lattice structure 20 includes the Delaunay lattice structure 30, the shortest distance between the end of the first rod-shaped portion 22 to which the second rod-shaped portion 23 is connected and the housing wall portion 5 is less than the maximum length of 22. When the lattice structure portion 20 includes the Voronoi lattice structure portion 40, the shortest distance between the end of the first rod-shaped portion 22 to which the second rod-shaped portion 23 is connected and the housing wall portion 5 is only the Voronoi boundary surface 42. It is shorter than the maximum diagonal length of the plurality of Voronoi polyhedrons 43 to be formed.

<Fourth Embodiment>
The housing 1 included in the housing providing device 100 according to the fourth embodiment of the present invention will be described. The fourth embodiment may or may not have the configurations of the second to third embodiments. The fourth embodiment has the following configuration in addition to the configuration of the first embodiment.
When the lattice structure 20 includes the Delaunay lattice structure 30 , the maximum length of the plurality of first rod-shaped portions 22 is less than four times the average length of the plurality of first rod-shaped portions 22 . The maximum length of the plurality of first rod-shaped portions 22 may be smaller than three times the average length of the plurality of first rod-shaped portions 22 .
When the lattice structure portion 20 includes the Voronoi lattice structure portion 40, the maximum value of the distance between the two generating points 41 located on both sides of the Voronoi boundary surface 42 surrounded by the plurality of first rod-shaped portions 22 is the same as the plurality of first It is smaller than four times the average value of the distances between the two generating points 41 positioned on both sides of the Voronoi boundary surface 42 surrounded by the bar-shaped portion 22 . The maximum value of the distance between the two generating points 41 positioned on both sides of the Voronoi boundary surface 42 surrounded by the plurality of first rod-shaped portions 22 is on both sides of the Voronoi boundary surface 42 surrounded by the plurality of first rod-shaped portions 22 It may be smaller than three times the average value of the distances between the two generating points 41 located.
In the Voronoi lattice structure 40 , the maximum length of the plurality of first rod-shaped portions 22 is less than five times the average length of the plurality of first rod-shaped portions 22 .

<Fifth Embodiment>
The housing 1 included in the housing providing device 100 according to the fifth embodiment of the present invention will be described with reference to FIG. The fifth embodiment has the configuration of the first embodiment. The fifth embodiment may or may not have the configurations of the second to fourth embodiments. FIG. 5 is merely an example of the fifth embodiment. The housing 1 of the fifth embodiment has a lattice structure 20 provided in the coolant passage 10 . Two line segments that are included in the first cross section that crosses the coolant flow direction F and that are perpendicular to each other are set to line segments S4 and S5. A first transverse plane passes through the Delaunay lattice structure 30 or the Voronoi lattice structure 40 . FIG. 5 shows the first cross-section. The Delaunay lattice structure 30 is formed so that two line segments S4 and S5 each pass through two or more Delaunay triangular pyramids 33 each having four Delaunay points 31 formed by connecting points between the first rods 22. It is formed. The Voronoi lattice structure part 40 is formed such that two line segments S4 and S5 each pass through two or more Voronoi polyhedrons 43 having only vertices formed by connecting points between the first rod-shaped parts 22 . Regardless of whether the lattice structure 20 includes the Delaunay lattice structure 30 or the Voronoi lattice structure 40, the lattice structure 20 forms a portion of the housing wall 5 and the lattice in each of the directions of the two line segments S4 and S5. The structural portion 20 and another part of the housing wall portion 5 are formed so as to be continuous. Note that in FIG. 5 , the two line segments S4 and S5 are parallel to the edge of the coolant passage 10, respectively. However, the shape of the coolant passage 10 in the first cross section and the directions and positions of the two line segments S4 and S5 are not limited to those shown in FIG. The line segments S4 and S5 may be the same as or different from any two of the three line segments S1, S2 and S3 in the first embodiment.

<Sixth embodiment>
The housing 1 provided in the housing providing device 100 of the sixth embodiment of the present invention will be described with reference to FIGS. 6(a) to 6(d). The sixth embodiment has the configuration of the first embodiment. The sixth embodiment may or may not have the configurations of the second to fifth embodiments. 6(a) and 6(b) show one example of the sixth embodiment, and FIGS. 6(c) and 6(d) show another example of the sixth embodiment. The housing 1 of the sixth embodiment has a lattice structure 20 provided in the refrigerant passage 10 . 6(a) and 6(c) show cross sections along the coolant flow direction F, respectively. FIGS. 6(b) and 6(d) show cross sections taken along line AA shown in FIGS. 6(a) and 6(c), respectively. At least part of the refrigerant passage 10 in the refrigerant flow direction F has a first passage portion 11 provided with at least a portion of the lattice structure 20 and a second passage portion 12 not provided with the lattice structure 20. . The second passage portion 12 and the first passage portion 11 are arranged in a direction crossing the refrigerant flow direction F. As shown in FIG. At least part of the Delaunay lattice structure 30 or the Voronoi lattice structure 40 is provided in the first passage portion 11 . Three line segments included in the first passage portion 11 and orthogonal to each other are set to line segments S6, S7, and S8. The Delaunay lattice structure 30 has three line segments S6, S7, and S8 each passing through two or more Delaunay triangular pyramids 33 each having four Delaunay points 31 formed by connecting points between the first rods 22. is formed as The Voronoi lattice structure portion 40 is formed such that three line segments S6, S7, and S8 each pass through two or more Voronoi polyhedrons 43 having only vertices formed by connecting points between the first rod-shaped portions 22. . 6(a) to 6(d), the three line segments S6, S7, and S8 are parallel to the edge of the coolant passage 10, respectively. However, the shape of the refrigerant passage 10 and the directions and positions of the three line segments S6, S7 and S8 are not limited to those shown in FIGS. 6(a) to 6(d).

<Seventh embodiment>
The housing 1 included in the housing providing device 100 of the seventh embodiment of the present invention will be described with reference to FIGS. 7(a) and 7(b). The seventh embodiment has the configuration of the first embodiment. The seventh embodiment may or may not have the configurations of the second to sixth embodiments. FIGS. 7(a) and 7(b) are merely examples of the seventh embodiment. The housing 1 of the seventh embodiment has a lattice structure 20 provided in the coolant passage 10 . The refrigerant passage 10 has a flow direction changing portion 13 in which the refrigerant flow direction F changes. At least a portion of the lattice structure portion 20 is provided on at least a portion of the flow direction changing portion 13 . Two line segments included in the second cross section crossing the flow direction changing portion 13 and orthogonal to each other are set to line segments S9 and S10. A second transverse plane passes through the Delaunay lattice structure 30 or the Voronoi lattice structure 40 . FIG. 7(a) shows a cross section along the coolant flow direction F, and FIG. 7(b) shows a cross section taken along line BB shown in FIG. 7(a). FIG. 7(b) shows the second cross section. The Delaunay lattice structure 30 is formed so that two line segments S9 and S10 each pass through two or more Delaunay triangular pyramids 33 each having four Delaunay points 31 formed by connecting points between the first rod-shaped portions 22. It is formed. The Voronoi lattice structure portion 40 is formed such that two line segments S9 and S10 each pass through two or more Voronoi polyhedrons 43 having only vertices formed by connecting points between the first rod-shaped portions 22 . The shape of the flow direction changing portion 13 is not limited to the shape shown in FIGS. 7(a) and 7(b). Also, in FIG. 7A, the two line segments S9 and S10 are parallel to the edge of the coolant passage 10, respectively. However, the shape of the refrigerant passage 10 in the second cross section and the directions and positions of the two line segments S9 and S10 are not limited to those shown in FIG. 7(a).

<Eighth Embodiment>
The housing 1 included in the housing providing device 100 of the eighth embodiment of the present invention will be described with reference to FIGS. 7(c) and 7(d). The eighth embodiment has the configuration of the first embodiment. The eighth embodiment may or may not have the configurations of the second to seventh embodiments. FIGS. 7(c) and 7(d) are merely examples of the eighth embodiment. The housing 1 of the eighth embodiment has a lattice structure 20 provided in the coolant passage 10 . The coolant passage 10 has a cross-sectional change portion 14 in which the cross-sectional area of the coolant passage 10 changes. At least a portion of the lattice structure portion 20 is provided on at least a portion of the cross-section changing portion 14 . Two line segments that are included in the third cross section that crosses the cross section changing portion 14 and that are perpendicular to each other are set to be line segments S11 and S12. A third transverse plane passes through the Delaunay lattice structure 30 or the Voronoi lattice structure 40 . FIG. 7(c) shows a cross section along the coolant flow direction F, and FIG. 7(d) shows a cross section taken along line CC shown in FIG. 7(c). FIG. 7(d) shows a third cross section. The Delaunay lattice structure 30 has two line segments S11 and S12 each passing through two or more Delaunay triangular pyramids 33 each having four Delaunay points 31 formed by connecting points between the first rod-shaped portions 22. It is formed. The Voronoi lattice structure part 40 is formed such that two line segments S11 and S12 each pass through two or more Voronoi polyhedrons 43 having only vertices formed by connecting points between the first rod-shaped parts 22 . Note that the shape of the cross-section changing portion 14 is not limited to the shapes shown in FIGS. 7(c) and 7(d). Also, in FIG. 7C, the two line segments S11 and S12 are parallel to the edge of the coolant passage 10, respectively. However, the shape of the coolant passage 10 in the third cross section and the directions and positions of the two line segments S11 and S12 are not limited to those shown in FIG. 7(c).

<Ninth Embodiment>
The housing 101 included in the housing providing apparatus 100 of the ninth embodiment of the present invention will be described with reference to FIGS. 8(a) to 8(c), 9(a), and 9(b). A housing 101 of the ninth embodiment has the configuration of the housing 1 of the first embodiment. The housing 101 of the ninth embodiment may have the configuration of the housing 1 of any one of the second to eighth embodiments. A housing 101 of the ninth embodiment accommodates a rotating electric machine 190 . The rotating electric machine 190 may be a motor, a generator, or may have the functions of both a motor and a generator. The rotating electrical machine 190 may be an axial gap type rotating electrical machine 190 as shown in FIG. 8A, an inner rotor type radial gap type rotating electrical machine 190 as shown in FIG. The rotary electric machine 190 may be an outer rotor type radial gap type rotary electric machine 190 as shown in c). The rotating electric machine 190 has a shaft 191 , a rotor 192 and a stator 193 . The shaft 191 is rotatably supported by the housing 101 via bearings. Rotor 192 is fixed to shaft 191 and rotates integrally with shaft 191 . The rotor 192 has magnets 192a. The stator 193 has a stator yoke 193a and a winding portion 193b. As shown in FIG. 8A , in an axial gap type rotating electric machine 190 , a rotor 192 and a stator 193 face each other in a direction parallel to the central axis of the shaft 191 . As shown in FIG. 8B , in an inner rotor type radial gap type rotating electric machine 190 , a rotor 192 is arranged radially inside a stator 193 . As shown in FIG. 8( c ), in an outer rotor type radial gap type rotary electric machine 190 , the magnets 192 a of the rotor 192 are arranged radially outward of the stator 193 . When the rotating electric machine 190 functions as a motor or a generator, heat is generated in the winding portion 193b due to current flowing through the winding portion 193b. When the rotating electric machine 190 functions as a motor or a generator, eddy currents are generated due to changes in the magnetic field, and current flows through the stator yoke 193 a and the rotor 192 . Heat is thereby generated in the stator yoke 193 a and the rotor 192 . Rotor 192 and stator 193 correspond to the heat source of the present invention.

8(a) to 8(c), the housing 101 has a housing wall portion 105 that forms a housing space 104 that houses the rotating electrical machine 190. In FIG. The housing wall portion 105 has a substantially plate-shaped lower wall portion 151 , a cylindrical side wall portion 152 , and a substantially plate-shaped upper wall portion 153 . Side wall portion 152 connects upper wall portion 153 and lower wall portion 151 . The side wall portion 152 is formed integrally with the upper wall portion 153 . The side wall portion 152 may be integrally molded with the lower wall portion 151 . In addition, although the lower wall portion 151 is located below the upper wall portion 153 in the vertical direction of the paper surface, it is not always located below the upper wall portion 153 when the housing 101 is used. In a situation where the housing 101 is used, the lower wall portion 151 may be positioned above the upper wall portion 153, and the lower wall portion 151 and the upper wall portion 153 may be horizontally aligned. Side wall portion 152 is positioned radially outward of rotating electric machine 190 . In FIG. 8A , the stator 193 is fixed to the lower wall portion 151 and is in contact with the lower wall portion 151 or in contact with a member (not shown) that contacts the lower wall portion 151 . In FIG. 8B, the stator 193 is fixed to the side wall portion 152 and is in contact with the side wall portion 152 or in contact with a member (not shown) that contacts the side wall portion 152 . In FIG. 8C, the housing wall portion 105 has an inner cylindrical portion 154 connected to the lower wall portion 151 and positioned radially inside the stator 193 . The stator 193 is fixed to the inner tubular portion 154 and is in contact with the inner tubular portion 154 or in contact with a member (not shown) that contacts the inner tubular portion 154 .

The housing wall portion 105 forms a plurality of refrigerant passages 110 . The refrigerant flowing through each refrigerant passage 110 may be gas (for example, air) or liquid. In the ninth embodiment, when the coolant is air, a fan (not shown) may be provided on the shaft 191 for sending the air outside the housing 101 to the inlet of the coolant passage 110 . The inlet and outlet of each coolant passage 110 are formed on the outer surface 106 of the housing wall portion 105 . A plurality of coolant passages 110 are formed at intervals in the circumferential direction around the central axis of shaft 191 . Each coolant passage 110 is formed in an upper wall portion 153 , a side wall portion 152 and a lower wall portion 151 . Each refrigerant passage 110 is composed of a refrigerant passage lower portion 110a, a refrigerant passage intermediate portion 110b, and a refrigerant passage upper portion 110c. The refrigerant passage lower portion 110 a is a portion of the refrigerant passage 110 formed in the lower wall portion 151 . The refrigerant passage intermediate portion 110 b is a portion of the refrigerant passage 110 formed in the side wall portion 152 . The coolant passage upper portion 110 c is a portion of the coolant passage 110 formed in the upper wall portion 153 . Each coolant passage 110 is provided with two lattice structure portions 20 . One of the two lattice structure portions 20 is provided on the lower wall portion 151 and the other lattice structure portion 20 is provided on the side wall portion 152 and the upper wall portion 153 . The two lattice structure portions 20 are provided throughout the coolant flow direction F of the coolant passage 110 . The two lattice structure portions 20 may be provided only in a portion of the coolant passage 110 in the coolant flow direction F. Each lattice structure 20 is integrally molded.

The coolant passage 110 has a bent portion at a corner of the housing 101 or the like, where the coolant flow direction F is bent. The bent portion is included in the flow direction change portion 13 . The coolant passage 110 has bent portions at both ends of the coolant passage lower portion 110a and both ends of the coolant passage upper portion 110c. In addition, the coolant passage 110 has a tapered portion in a portion including the inlet in which the area of the cross section continuously decreases toward the downstream in the coolant flow direction F. As shown in FIG. This makes it easier for the coolant to flow into the coolant passage 110 from the inlet of the coolant passage 110 . The tapered portion is included in the cross-section changing portion 14 of the eighth embodiment. 9A is a perspective view of the side wall portion 152. FIG. As shown in FIG. 9A, the coolant flow direction F of the coolant passage intermediate portion 110b is spiral. That is, the coolant flow direction F of the coolant passage intermediate portion 110b is inclined in the circumferential direction with respect to the direction of the central axis of the shaft 191 . Since the length of the refrigerant passage middle portion 110b in the refrigerant flow direction F is longer than when the refrigerant passage middle portion 110b is parallel to the central axis of the shaft 191, the cooling performance can be improved. Since the refrigerant passage intermediate portion 110 b is formed in a spiral shape on the cylindrical side wall portion 152 , the refrigerant flow direction F of the refrigerant passage intermediate portion 110 b gently curves along the side wall portion 152 . The refrigerant passage intermediate portion 110 b is included in the flow direction changing portion 13 . 9B is a view of the upper wall portion 153 viewed in the direction of the central axis of the shaft 191, and a view of the lower wall portion 151 viewed in the direction of the central axis of the shaft 191. FIG. As shown in FIG. 9(b), the refrigerant passage upper portion 110c and the refrigerant passage lower portion 110a have curved portions in which the refrigerant flow direction F is substantially radial. Compared to the case where the refrigerant flow direction F of these portions is parallel to the radial direction or the straight line crossing the radial direction, the refrigerant passage upper portion 110c and the refrigerant passage lower portion 110a are longer in the refrigerant flow direction F. , can improve the cooling performance. A curved portion in which the refrigerant flow direction F is substantially radial when viewed in the direction of the central axis of the shaft 191 is included in the flow direction changing portion 13 .

The coolant passage lower portion 110a in FIG. 8A is a portion of the housing wall portion 105 in contact with the stator 193, a portion in contact with a member (not shown) in contact with the stator 193, or a minute gap. It is formed so as to pass through a position close to the part facing the stator 193 with an opening. The upper part 110c of the coolant passage in FIG. 8(b) is a portion of the housing wall portion 105 in contact with the stator 193, a portion in contact with a member (not shown) in contact with the stator 193, or a minute gap. It is formed so as to pass through a position close to the part facing the stator 193 with an opening. In the rotary electric machine 190 of FIG. 8(c), the refrigerant passage lower portion 110a among the refrigerant passage lower portion 110a, the refrigerant passage intermediate portion 110b, and the refrigerant passage upper portion 110c is in contact with the stator 193 in the housing wall portion 105 or It is closest to the point where a member (not shown) that contacts the stator 193 is in contact. Therefore, the coolant flowing through the coolant passage 110 in FIGS. 8A to 8C easily receives heat generated by the stator 193 and the rotor 192 . Since the lattice structure 20 is provided in the coolant passage 110 having high cooling performance in this manner, the cooling performance of the housing 101 can be further improved.

The refrigerant passage lower portion 110a does not have to have a bent portion. That is, the refrigerant flow direction F of the entire refrigerant passage lower portion 110a may be the same as the refrigerant flow direction F of the refrigerant passage intermediate portion 110b. The coolant passage upper portion 110c may not have a bent portion. That is, the refrigerant flow direction F of the entire refrigerant passage upper portion 110c may be the same as the refrigerant flow direction F of the refrigerant passage intermediate portion 110b. The refrigerant flow direction F of the refrigerant passage intermediate portion 110b may be linear parallel to the direction of the center axis of the shaft 191 . The side wall portion 152 may have a square tubular shape. In this case, the coolant flow direction F of the coolant passage intermediate portion 110 b may be a straight line that is inclined with respect to the direction of the central axis of the shaft 191 .

<Modification 1 of the Ninth Embodiment>
As modification 1 of the ninth embodiment, for example, as shown in FIG. Although FIG. 10(a) shows an example in which the housing 101 of FIG. 8(a) is changed, the housing 101 of FIGS. 8(b) and 8(c) may be changed. The housing 101 shown in FIG. 10A will be described below. A housing wall portion 105 of the housing 101 forms a plurality of first refrigerant passages 110A1 and a plurality of second refrigerant passages 110A2. The refrigerant passage 110A is a general term for the first refrigerant passage 110A1 and the second refrigerant passage 110A2. An inlet and an outlet of each coolant passage 110A are formed on the outer surface 106 of the housing wall portion 105 . The first refrigerant passage 110A1 differs from the refrigerant passage 110 of the ninth embodiment in the shape of the refrigerant passage lower portion 110a, and otherwise has the same configuration as the refrigerant passage 110 of the ninth embodiment. The second coolant passage 110A2 is formed only in the lower wall portion 151. As shown in FIG. The second refrigerant passage 110A2 has the same shape as most of the refrigerant passage lower portion 110a of the refrigerant passage 110 of the ninth embodiment, and differs from the refrigerant passage lower portion 110a in the shape near the outlet. The first coolant passages 110A1 and the second coolant passages 110A2 are alternately arranged in the circumferential direction around the central axis of the shaft 191. As shown in FIG. Two lattice structure portions 20 are provided in each first coolant passage 110A1. One of the two lattice structure portions 20 is provided on the lower wall portion 151 and the other lattice structure portion 20 is provided on the side wall portion 152 and the upper wall portion 153 . The two lattice structure portions 20 are provided over the entire area of the first coolant passage 110A1 in the coolant flow direction F. As shown in FIG. The two lattice structure portions 20 may be provided only partially in the coolant flow direction F of the first coolant passage 110A1. Each lattice structure 20 is integrally molded. One lattice structure portion 20 is provided in each second coolant passage 110A2. The lattice structure portion 20 is provided over the entire area of the second refrigerant passage 110A2 in the refrigerant flow direction F. As shown in FIG. The lattice structure portion 20 may be provided only in a portion of the second coolant passage 110A2 in the coolant flow direction F. The lattice structure 20 is integrally molded. In Modification 1 of the ninth embodiment, although the locations where the refrigerant passages are formed are substantially the same as in the ninth embodiment, the length of each refrigerant passage in the refrigerant flow direction F can be made shorter than in the ninth embodiment. , can improve the cooling performance. Since the lattice structure 20 is provided in the coolant passage 110A having high cooling performance in this manner, the cooling performance of the housing 101 can be further improved.

<Modification 2 of the Ninth Embodiment>
As a modification 2 of the ninth embodiment, for example, as shown in FIG. 10B, the housing 101 may have an internal circulation refrigerant passage 110B for circulating the air in the housing space 104. FIG. FIG. 10(b) shows an example in which the housing 101 of FIG. 8(a) is changed, but the housing 101 of FIGS. 8(b) and 8(c) may be changed. In Modification 2 of the ninth embodiment, a fan (not shown) may be provided on shaft 191 or rotor 192 for sending the air (refrigerant) in housing space 104 to internal circulation refrigerant passage 110B. The housing 101 shown in FIG. 10B will be described below. The housing wall portion 105 of the housing 101 has a plurality of internal circulation refrigerant passages 110B in addition to the plurality of first refrigerant passages 110A1 and the plurality of second refrigerant passages 110A2 of Modification 1 of the ninth embodiment. The internal circulation refrigerant passage 110B is not included in the refrigerant passage of the present invention. The inlet and outlet of each internal circulation coolant passage 110B are formed on the inner surface 107 of the housing wall portion 105 . The plurality of internal circulation refrigerant passages 110B are formed at intervals in the circumferential direction around the central axis of the shaft 191 . Each internal circulation refrigerant passage 110B is formed in the upper wall portion 153 and the side wall portion 152 . The internal circulation refrigerant passages 110B and the first refrigerant passages 110A1 are alternately arranged in the circumferential direction around the central axis of the shaft 191. As shown in FIG. One lattice structure portion 20 is provided in each internal circulation refrigerant passage 110B. The lattice structure 20 is provided over the entire area in the refrigerant flow direction F of the internal circulation refrigerant passage 110B. The lattice structure portion 20 may be provided only in a portion of the internal circulation refrigerant passage 110B in the refrigerant flow direction F. The lattice structure 20 is integrally molded. Since the housing 101 of Modification 2 of the ninth embodiment has the internal circulation refrigerant passage 110B for circulating the air in the housing space 104, the cooling performance can be improved. Since the lattice structure 20 is provided in the internal circulation coolant passage 110B having high cooling performance in this way, the cooling performance of the housing 101 can be further improved. In addition, the refrigerant passage combined with the internal circulation refrigerant passage 110B is not limited to the first refrigerant passage 110A1 and the second refrigerant passage 110A2. For example, the coolant passage 110 of the ninth embodiment may be provided instead of the first coolant passage 110A1. The refrigerant passage 110 of the ninth embodiment may be provided instead of the second refrigerant passage 110A2. The refrigerant passage 110 of the ninth embodiment may be provided instead of the first refrigerant passage 110A1 and the second refrigerant passage 110A2.

<Modification 3 of the Ninth Embodiment>
As a modification 3 of the ninth embodiment, for example, as shown in FIG. good too. FIG. 10(c) shows an example in which the housing 101 of FIG. 8(a) is changed, but the housing 101 of FIGS. 8(b) and 8(c) may be changed. Although the lattice structure 20 is provided only on the lower wall 151 in FIG. Although the housing 101 does not have the coolant passage 110 in FIG. 10C, it may have the coolant passage 110 .

<Tenth Embodiment>
The housing 201 included in the housing providing apparatus 100 according to the tenth embodiment of the present invention will be described with reference to FIGS. 11(a) to 11(c). FIG. 11(b) is a cross-sectional view taken along line DD shown in FIG. 11(a). FIG. 11(c) is a cross-sectional view taken along line EE shown in FIG. 11(a). A housing 201 of the tenth embodiment has the configuration of the housing 1 of the first embodiment. The housing 201 of the tenth embodiment may have the configuration of the housing 1 of any one of the second to eighth embodiments. As shown in FIGS. 11( a ) and 11 ( b ), the housing 201 of the tenth embodiment accommodates a content 290 including a plurality of rechargeable power storage devices 291 . The power storage device 291 may be a cell or an assembled battery composed of a plurality of cells. The cells may be cylindrical, rectangular, or laminated. Heat is generated in the power storage device 291 when the power storage device 291 is discharged or charged. The power storage device 291 corresponds to the heat source of the present invention. The content 290 includes a heat dissipation member 292 with high thermal conductivity. Heat dissipation member 292 is arranged so as to be in contact with power storage device 291 . Both the power storage device 291 and the heat dissipation member 292 may be interpreted as corresponding to the heat source of the present invention. Contents 290 may include a battery management system (BMS: battery management system) that manages charging and discharging of power storage device 291 .

The housing 201 has a housing wall portion 205 that forms a housing space 204 that houses a content 290 including a plurality of power storage devices 291 . The housing 201 has a substantially rectangular parallelepiped shape. The housing wall portion 205 has a substantially plate-shaped lower wall portion 251 , a rectangular tubular side wall portion 252 , a substantially plate-shaped upper wall portion 253 , and a plurality of partition wall portions 254 . Side wall portion 252 connects upper wall portion 253 and lower wall portion 251 . The side wall portion 252 is formed integrally with the lower wall portion 251 . The side wall portion 252 may be integrally formed with the upper wall portion 253 . Although the lower wall portion 251 is located below the upper wall portion 253 in the vertical direction of the paper surface of FIG. In a situation where the housing 201 is used, the lower wall portion 251 may be positioned above the upper wall portion 253, and the lower wall portion 251 and the upper wall portion 253 may be horizontally aligned. A plurality of partition wall portions 254 are connected to the lower wall portion 251 . The plurality of partition wall portions 254 may be connected to the upper wall portion 253 without being connected to the lower wall portion 251 . A plurality of partition wall portions 254 may be connected to both the lower wall portion 251 and the upper wall portion 253 . Each partition wall portion 254 is arranged between a power storage device 291 and an adjacent power storage device 291 . A plurality of heat dissipation members 292 are in contact with the housing wall portion 205 . Each heat radiating member 292 contacts the lower wall portion 251 . Furthermore, each heat dissipation member 292 contacts at least one of the partition wall portion 254 and the side wall portion 252 . Note that the portion of the heat radiating member 292 that contacts the housing wall portion 205 is not limited to this. When the heat dissipation member 292 has elasticity, the heat dissipation member 292 may function as a shock absorber.

The housing wall portion 205 forms a plurality of refrigerant passages 210 . The refrigerant flowing through each refrigerant passage 210 may be gas (for example, air) or liquid. The inlet and outlet of each coolant passage 210 are formed in the outer surface 206 of the housing wall portion 205 . The plurality of coolant passages 210 are formed at intervals in the vertical direction of the paper surface of FIG. 11(a). The plurality of refrigerant passages 210 includes a plurality of first refrigerant passages 210A and second refrigerant passages 210B. Each first coolant passage 210</b>A is formed in a side wall portion 252 and a plurality of partition wall portions 254 . The second coolant passage 210B is formed in the lower wall portion 251 . Each coolant passage 210 is provided with one lattice structure 20 . The lattice structure portion 20 is provided over the entire area of the refrigerant passage 210 in the refrigerant flow direction F. As shown in FIG. The lattice structure portion 20 may be provided only in a portion of the coolant passage 210 in the coolant flow direction F. The lattice structure 20 is integrally molded.

The first refrigerant passage 210A and the second refrigerant passage 210B have bent portions at the corners of the housing 201 or the like where the refrigerant flow direction F bends. The bent portions of the first refrigerant passage 210A and the second refrigerant passage 210B are included in the flow direction changing portion 13 . As shown in FIG. 11(c), the second refrigerant passage 210B has a shape that can be drawn with a single stroke from the inlet to the outlet. As shown in FIG. 11B, the first refrigerant passage 210A has a branch point where the refrigerant flow branches and a confluence point where the refrigerant flow joins. The branching portion including the branching point and the branching portion including the merging point of the first refrigerant passage 210A serve as both the flow direction changing portion 13 and the cross section changing portion 14 . In addition, the first refrigerant passage 210A and the second refrigerant passage 210B have tapered portions in which the area of the cross section continuously decreases toward the downstream in the refrigerant flow direction F in the portions including the inlets. The tapered portion is included in the cross-section changing portion 14 . A plurality of first coolant passages 210A are formed to surround a plurality of power storage devices 291 . Therefore, the coolant flowing through the first coolant passage 210A easily receives the heat generated in the power storage device 291 . Most of the second refrigerant passage 210B is positioned directly below the power storage device 291 in the vertical direction of the paper surface of FIG. 11(a). Therefore, the coolant flowing through the second coolant passage 210</b>B easily receives the heat generated in the power storage device 291 . Since the lattice structure portion 20 is provided in the

coolant passages

210A and 210B having high cooling performance in this manner, the cooling performance of the housing 201 can be further improved. Note that the housing wall portion 205 having the second refrigerant passage 210B may not have the plurality of first refrigerant passages 210A. The housing wall portion 205 having the plurality of first coolant passages 210A may not have the second coolant passages 210B.

<Eleventh Embodiment>
The housing 301 included in the housing providing apparatus 100 according to the eleventh embodiment of the present invention will be described with reference to FIGS. 12(a) and 12(b). A housing 301 of the eleventh embodiment has the configuration of the housing 1 of the first embodiment. The housing 301 of the eleventh embodiment may have the configuration of the housing 1 of any one of the second to eighth embodiments. A housing 301 of the eleventh embodiment accommodates an electronic device 390 . The electronic device 390 has a circuit board 391, electronic components 392 mounted on the surface of the circuit board 391, and a heat dissipation member 393 with high thermal conductivity. Circuit board 391 and electronic component 392 correspond to the heat source of the present invention. The heat dissipation member 393 is in contact with the back surface of the circuit board 391 .

The housing 301 has a housing wall portion 305 that forms a housing space 304 that houses the electronic device 390 . The housing 301 has a substantially rectangular parallelepiped shape. The housing wall portion 305 has a substantially plate-shaped lower wall portion 351 , a rectangular tubular side wall portion 352 , and a substantially plate-shaped upper wall portion 353 . The side wall portion 352 connects the upper wall portion 353 and the lower wall portion 351 . The side wall portion 352 is formed integrally with the upper wall portion 353 . The side wall portion 352 may be integrally formed with the lower wall portion 351 . Although the lower wall portion 351 is located below the upper wall portion 353 in the vertical direction of the paper surface of FIG. In a situation where the housing 301 is used, the lower wall portion 351 may be positioned above the upper wall portion 353, and the lower wall portion 351 and the upper wall portion 353 may be horizontally aligned. The circuit board 391 is fixed to the lower wall portion 351 . A heat dissipation member 393 is arranged between the circuit board 391 and the lower wall portion 351 . The heat dissipation member 393 is in contact with the lower wall portion 351 .

As shown in FIGS. 12( a ) and 12 ( b ), housing wall portion 305 forms refrigerant passage 310 . The refrigerant flowing through the refrigerant passage 310 may be gas (for example, air) or liquid. The inlet and outlet of the coolant passage 310 are formed on the outer surface 306 of the housing wall portion 305 . The coolant passage 310 is formed in the lower wall portion 351 , the side wall portion 352 and the upper wall portion 353 . Two lattice structure portions 20 are provided in the coolant passage 310 . One of the two lattice structure portions 20 is provided on the lower wall portion 351 and the other lattice structure portion 20 is provided on the side wall portion 352 and the upper wall portion 353 . The two lattice structure portions 20 are provided over the entire area of the coolant passage 310 in the coolant flow direction F. As shown in FIG. The two lattice structure portions 20 may be provided only in a portion of the coolant passage 310 in the coolant flow direction F. Each lattice structure 20 is integrally molded.
The coolant passage 310 has a bent portion where the coolant flow direction F is bent, such as at a corner of the housing 301 . The bent portion is included in the flow direction change portion 13 . As shown in FIG. 12(b), the refrigerant passage 310 has a branch point where the refrigerant flow branches and a confluence point where the refrigerant flow joins. The branching portion including the branching point and the merging portion including the merging point of the refrigerant passage 310 serve as both the flow direction changing portion 13 and the cross section changing portion 14 . In addition, the coolant passage 310 has a tapered portion in a portion including the inlet in which the area of the cross section continuously decreases toward the downstream in the coolant flow direction F. As shown in FIG. The tapered portion is included in the cross-section changing portion 14 . A portion of the coolant passage 310 is formed in the lower wall portion 351 of the housing wall portion 305 . In other words, part of the coolant passage 310 passes through a portion of the housing wall portion 305 that is most likely to receive heat from the electronic device 390 . Therefore, the coolant flowing through coolant passage 310 easily receives heat generated by circuit board 391 and electronic component 392 . Since the lattice structure 20 is provided in the coolant passage 310 having high cooling performance in this manner, the cooling performance of the housing 301 can be further improved. Note that the coolant passage 310 may be formed only in the lower wall portion 351 .

It should be noted that the ninth embodiment and

modifications

1 and 2 thereof are merely examples in which the present invention is applied to a housing that accommodates a rotating electric machine. The configuration of the housing that accommodates the rotating electric machine to which the present invention is applied is not limited to the configuration of the ninth embodiment and its modification examples 1 and 2. For example, like the coolant passage described in Patent Literature 1, the coolant passage may be formed along the circumferential direction around the central axis of the shaft. Further, for example, the housing that accommodates the rotating electrical machine may have a lattice structure formed so as to be continuous with the inner surface of the housing wall. The tenth embodiment is merely an example in which the present invention is applied to a housing that accommodates a power storage device. The configuration of the housing that accommodates the power storage device to which the present invention is applied is not limited to the configuration of the tenth embodiment. For example, the housing that houses the power storage device may have a lattice structure that is continuous with the outer surface or the inner surface of the housing wall. The eleventh embodiment is merely an example in which the present invention is applied to a housing that accommodates electronic equipment. The configuration of the housing that accommodates the electronic device to which the present invention is applied is not limited to the configuration of the eleventh embodiment. For example, a housing that houses an electronic device may have a lattice structure that is continuous with the outer surface or the inner surface of the housing wall.

100:

housing equipment

1, 101, 201, 301: housing 2, 290: content 3:

heat source

4, 104, 204, 304:

housing space

5, 105, 205, 305:

housing wall

6, 106 , 206, 306: outer surface 7, 107:

inner surface

10, 110, 110A, 110A1, 110A2, 210, 210A, 210B, 310: refrigerant passage 20: lattice structure 21, 21P, 21Q, 21R, 21S: unit cell 22: Cell space 191: Rotating electric machine (contents)
192: Rotor (heat source)
193: Stator (heat source)
291: Power storage device (heat source)
390: Electronic equipment (contents)
391: Circuit board (heat source)
392: Electronic components (heat sources)
F: Refrigerant flow direction

Claims

A housing-equipped device comprising a housing having a housing wall forming a housing space for housing contents including a heat source,
The housing has a cooling structure in which heat generated by the heat source is dissipated to the outside of the housing,
The cooling structure is formed so as to be continuous with the outer surface or the inner surface of the housing wall portion, or is not continuous with either the outer surface or the inner surface of the housing wall portion, and the coolant flows through the cooling structure. including a lattice structure formed so as to be continuous with the housing wall forming a passage;
The refrigerant passage is formed between the outer surface and the inner surface of the housing wall portion, and the maximum width of the refrigerant passage in a cross section transverse to the refrigerant flow direction is the same as the refrigerant flow of the refrigerant passage. formed to be shorter than the length of the direction,
When the maximum width of the lattice structure formed so as to be continuous with the outer surface or the inner surface of the housing wall in the thickness direction of the housing wall is defined as a first width, the housing wall looking at the lattice structure in a direction perpendicular to the region of the outer surface or the inner surface of the part where the lattice structure is provided, the lattice structure is perpendicular to the longest line segment that fits in the lattice structure. The length of any line segment that fits is longer than the first width,
The lattice structure portion is composed of a plurality of rod-shaped portions,
The lattice structure is
a Delaunay lattice structure composed of a plurality of first rod-shaped portions forming a plurality of Delaunay edges in a three-dimensional Delaunay diagram based on a plurality of Delaunay points randomly distributed in three dimensions, or
A Voronoi lattice structure consisting of a plurality of first rod-shaped portions forming sides of a plurality of Voronoi polyhedrons formed only by Voronoi boundary surfaces in a three-dimensional Voronoi diagram having a plurality of randomly distributed virtual points as the generating points. including the part
The Delaunay lattice structure is formed such that three line segments orthogonal to each other pass through two or more Delaunay triangular pyramids each having four Delaunay points formed by connection points between the first rod-shaped portions. is,
The Voronoi lattice structure part is formed so that each of three line segments perpendicular to each other passes through two or more Voronoi polyhedrons having only vertices formed by connecting points between the first rod-like parts. A device equipped with a housing.
In the Delaunay lattice structure or the Voronoi lattice structure, a plurality of the plurality of first rod-shaped portions of the plurality of first rod-shaped portions are formed so as to be continuous with the housing wall portion. The housing provided device according to claim 1.
The plurality of rod-shaped portions constituting the lattice structure includes, in addition to the plurality of first rod-shaped portions constituting the Delaunay lattice structure or the Voronoi lattice structure, a plurality of second rod-shaped portions,
In the plurality of second rod-shaped portions, an end of the first rod-shaped portion forming one of the Delaunay points or one vertex of the Voronoi polyhedron, at least one of the second rod-shaped portions, and the housing wall are continuous. 3. A housing-equipped device according to claim 1 or 2, characterized in that it is provided so as to be formed as a.
When the lattice structure includes the Delaunay lattice structure,
the shortest distance between the end of the first rod-shaped portion to which the second rod-shaped portion is connected and the housing wall portion is shorter than the maximum length of the plurality of first rod-shaped portions;
When the lattice structure includes the Voronoi lattice structure,
The shortest distance between the end of the first rod-shaped portion to which the second rod-shaped portion is connected and the housing wall portion is the length of the diagonal of the plurality of Voronoi polyhedrons formed only by the Voronoi boundary surfaces. 4. The enclosure-equipped device according to claim 3, wherein the length is shorter than the maximum value.
1-, wherein the maximum length of the plurality of first rod-shaped portions in the Delaunay lattice structure is smaller than four times the average length of the plurality of first rod-shaped portions. 5. The housing-equipped device according to any one of 4.
In the Voronoi lattice structure portion, the maximum value of the distance between the two generating points located on both sides of the Voronoi boundary surface surrounded by the plurality of first rod-shaped portions is the Voronoi surrounded by the plurality of first rod-shaped portions. 5. The housing-equipped device according to any one of claims 1 to 4, wherein the distance is smaller than four times the average value of the distances between the two generating points located on both sides of the boundary surface.
1 to 1, wherein in the Voronoi lattice structure, the maximum length of the plurality of first rod-shaped portions is smaller than five times the average length of the plurality of first rod-shaped portions. 7. The housing provided apparatus according to any one of 4 and 6.
The lattice structure is formed so as to be continuous with the housing wall forming the coolant passage without being continuous with either the outer surface or the internal surface of the housing wall,
The housing-equipped device introduces the gas or liquid around the housing-equipped device as the refrigerant into the refrigerant passage, and releases the refrigerant after passing through the refrigerant passage to the surroundings of the housing-equipped device. is configured to
The enclosure-equipped device according to any one of claims 1 to 7, wherein the enclosure-equipped device does not have a radiator for cooling the coolant after passing through the coolant passage.
The lattice structure is formed so as to be continuous with the housing wall forming the coolant passage without being continuous with either the outer surface or the internal surface of the housing wall,
The length of the lattice structure in the coolant flow direction is longer than the maximum width of the coolant passage in the cross section passing through the lattice structure. housing equipped device.
The lattice structure is formed so as to be continuous with the housing wall forming the coolant passage without being continuous with either the outer surface or the internal surface of the housing wall,
10. The housing-equipped device according to claim 9, wherein the length of the lattice structure in the coolant flow direction is longer than the circumferential length of the coolant passage in the cross section passing through the lattice structure.
The lattice structure is formed so as to be continuous with the housing wall forming the coolant passage without being continuous with either the outer surface or the internal surface of the housing wall,
When the lattice structure includes the Delaunay lattice structure,
In the lattice structure portion, two line segments orthogonal to each other included in a first cross section that traverses the coolant flow direction are formed by connection points between the first rod-shaped portions, and all of the Delaunay points are formed 4 passing through two or more Delaunay triangular pyramids each having one said Delaunay point, and in each of said two line segment directions, a portion of said housing wall, said lattice structure and the other of said housing wall formed so as to be continuous with a part,
When the lattice structure includes the Voronoi lattice structure,
The lattice structure has two or more mutually orthogonal line segments included in a first cross section that traverses the coolant flow direction, each of which has only vertexes formed by connection points between the first rod-shaped portions. through the Voronoi polyhedron of and in each of the directions of the two line segments, the part of the housing wall, the lattice structure, and the other part of the housing wall are continuous. The housing-equipped device according to any one of claims 1 to 10, characterized by:
The lattice structure is formed so as to be continuous with the housing wall forming the coolant passage without being continuous with either the outer surface or the internal surface of the housing wall,
At least a portion of the refrigerant passage in the refrigerant flow direction is aligned with a first passage portion provided with at least a portion of the lattice structure in a direction intersecting the first passage portion in the refrigerant flow direction. a second passage portion not provided with a lattice structure;
When the lattice structure includes the Delaunay lattice structure,
The Delaunay lattice structure has two or more Delaunay points, each of which is included in the first passage portion and has four Delaunay points formed by connection points between the first rod-shaped portions. Formed to pass through the Delaunay triangular pyramid,
When the lattice structure includes the Voronoi lattice structure,
In the Voronoi lattice structure, each of three mutually orthogonal line segments included in the first passage portion passes through two or more Voronoi polyhedrons each having only vertices formed by connection points between the first rod-shaped portions. The enclosure-equipped device according to any one of claims 1 to 11, characterized in that it is formed as follows.
The lattice structure is formed so as to be continuous with the housing wall forming the coolant passage without being continuous with either the outer surface or the internal surface of the housing wall,
At least a portion of the lattice structure is at least a portion of at least one of a flow direction changing portion in the refrigerant passage where the refrigerant flow direction changes, and a cross section changing portion in the refrigerant passage where the area of the cross section changes. provided in
When at least a portion of the lattice structure is provided in at least a portion of the flow direction changing portion, and the lattice structure includes the Delaunay lattice structure,
The Delaunay lattice structure has four Delaunay points in which two mutually orthogonal line segments included in a second cross section crossing the flow direction changing portion are respectively formed by connection points between the first rod-shaped portions. formed through two or more Delaunay triangular pyramids each having
When at least a portion of the lattice structure is provided in at least a portion of the flow direction changing portion, and the lattice structure includes the Voronoi lattice structure,
In the Voronoi lattice structure, each of two mutually orthogonal line segments included in a second cross section crossing the flow direction changing portion has only vertices formed by connection points between the first rod-shaped portions. formed through one or more Voronoi polyhedra,
When at least a portion of the lattice structure is provided in at least a portion of the cross-section changing portion, and the lattice structure includes the Delaunay lattice structure,
In the Delaunay lattice structure, two mutually orthogonal line segments included in a third cross-section crossing the cross-section changing portion each define four Delaunay points formed by connection points between the first rod-shaped portions. formed to pass through two or more Delaunay triangular pyramids each having
When at least part of the lattice structure is provided in at least part of the cross-section changing part, and the lattice structure includes the Voronoi lattice structure,
In the Voronoi lattice structure, each of two mutually orthogonal line segments included in a third cross section that crosses the cross-section changing portion has two vertices formed by connecting points between the first rod-shaped portions. 13. The housing-equipped device according to any one of claims 1 to 12, which is formed so as to pass through the Voronoi polyhedron.
The lattice structure is formed so as to be continuous with the outer surface or the inner surface of the housing wall,
The housing according to any one of claims 1 to 7, wherein the lattice structure is formed integrally with the outer surface or the inner surface of the housing wall by metal additive manufacturing. equipment.