Heat exchanger and manufacturing method thereof

Abstract

To provide a heat exchanger which can suppress a flow of the other fluid from being hindered in the vicinity of an entrance / exit of a flow passage, and its manufacturing method.SOLUTION: A radiator 1 comprises a core part 3, and a refrigerant flow passage 5a and an air flow passage 7 which are arranged at the core part. Cooling water flowing in the refrigerant flow passage 5 and air flowing in the air flow passage 7 perform a heat exchange via a bulkhead 54. The refrigerant flow passage 5 comprises a plurality of main flow passages 51 located so as to be aligned in a prescribe direction, an introduction chamber 52 communicating with the plurality of main flow passages 51, and extending in the prescribed direction, and a discharge chamber 53 communicating with the plurality of main flow passages 51, and extending in the prescribed direction. Each of the main flow passages 51 has an introduction-side shape change zone 55 in which the shape of a prescribed flow passage cross section gradually changes toward the introduction chamber 52 and is linearly connected to the adjacent main flow passage 51, and a discharge-side shape change zone 56 in which the shape of a prescribed flow passage cross section gradually changes toward the discharge chamber 53 and is linearly connected to the adjacent main flow passage 51.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] 2. Description of the Related Art Heat exchangers using various heat transfer methods have been widely used as devices for transferring heat between two fluids at different temperatures.

[0003] In recent years, research and development into energy efficiency has been actively conducted to ensure that more people have access to affordable, reliable, sustainable, and advanced energy. To contribute to energy efficiency, there is a demand for improved heat exchange efficiency in heat exchangers.

[0004] For example, Patent Document 1 describes a heat exchanger that has a plurality of tubular flow paths, including a plurality of first flow paths through which a first fluid flows and a plurality of second flow paths through which a second fluid flows that exchanges heat with the first fluid, and in which the positions and outer shapes of the tubular flow paths in a cross section perpendicular to each predetermined direction (the extension direction of the flow paths) change depending on the position in the predetermined direction. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-46161 Summary of the Invention [Problem to be solved by the invention]

[0006] However, as in the heat exchanger described in Patent Document 1, when the shape of the flow path in a heat exchanger is changed in a complex manner, the pressure loss of the fluid can increase. Furthermore, the obstruction of the flow of the fluid can be a factor in reducing the heat exchange efficiency. On the other hand, it is necessary to avoid obstructing the flow of other fluids near the inlet and outlet of the flow path.

[0007] The present invention provides a heat exchanger that can suppress an increase in pressure loss while suppressing obstruction of the flow of other fluids near the inlets and outlets of the flow paths, and a method for manufacturing the same. [Means for solving the problem]

[0008] The present invention provides A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows; a heat exchanger in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path; death, The introduction side shape change section and the discharge side shape change section are From the start point of the shape-changing section to the end point where the adjacent main flow paths are connected in a straight line, the shape of the predetermined flow path cross section of each of the main flow paths becomes longer in the direction in which the main flow paths are adjacent to each other, so that a communication path is gradually formed between the adjacent main flow paths, and the adjacent main flow paths are connected in a straight line at the end point. . The present invention also provides A core portion; a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows; a heat exchanger in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, In the inlet-side shape-changing section and the outlet-side shape-changing section, the shape of the predetermined flow path cross section changes while maintaining the cross-sectional area of ​​the flow path. The present invention also provides A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows; a heat exchanger in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The predetermined flow path cross section is cross-shaped. The present invention also provides A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows; a heat exchanger in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The first flow path is a third direction perpendicular to the first direction and the second direction, the third direction including a plurality of the main flow paths, the introduction chambers, and the discharge chambers; The second flow path has a plurality of flow paths that are formed by being surrounded by the partition walls that constitute the plurality of main flow paths.

[0009] The present invention also provides A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows; a heat exchanger manufacturing method, wherein in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is a plurality of main flow paths extending in a first direction and having predetermined flow path cross sections; an introduction chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths; a discharge chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths, The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The introduction side shape change section and the discharge side shape change section are From the start point of the shape-changing section to the end point where the main flow paths are linearly connected to the adjacent main flow paths, the shape of the predetermined flow path cross section of each of the main flow paths becomes longer in the direction in which the main flow paths are adjacent to each other, so that a communication path is gradually formed between the adjacent main flow paths, and the main flow paths are linearly connected at the end point, The manufacturing method includes a step of integrally molding the core portion by additive manufacturing. The present invention also provides A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows; a heat exchanger manufacturing method, wherein in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is a plurality of main flow paths extending in a first direction and having predetermined flow path cross sections; an introduction chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths; a discharge chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths, The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, the inlet-side shape-changing section and the outlet-side shape-changing section change the shape of the predetermined flow path cross section while maintaining the cross-sectional area of ​​the flow path, The manufacturing method includes a step of integrally molding the core portion by additive manufacturing. The present invention also provides A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows; a heat exchanger manufacturing method, wherein in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is a plurality of main flow paths extending in a first direction and having predetermined flow path cross sections; an introduction chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths; a discharge chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths, The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, the predetermined flow path cross section is cross-shaped, The manufacturing method includes a step of integrally molding the core portion by additive manufacturing. The present invention also provides A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows; a heat exchanger manufacturing method, wherein in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The first flow path is a third direction perpendicular to the first direction and the second direction, the third direction including a plurality of the main flow paths, the introduction chambers, and the discharge chambers; the second flow path has a plurality of flow paths formed by being surrounded by the partition walls that configure the plurality of main flow paths, The manufacturing method includes a step of integrally molding the core portion by additive manufacturing. [Effects of the Invention]

[0010] According to the present invention, the shape of the flow path cross section gradually changes in the inlet side shape change section and the outlet side shape change section, thereby suppressing an increase in pressure loss and suppressing the flow of one fluid from being obstructed near the inlet or outlet of the other fluid. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view of the radiator 1. [Figure 2] FIG. 2 is a partial perspective view exposing a cross section taken along line AA in FIG. 1. [Figure 3] 1. (A) is a partial cross-sectional view of a part of the cross section taken along line BB in FIG. 1, and (B) is a view showing the twisted ribbon 15. FIG. [Figure 4] This is a view of area D in Figure 2 as seen from direction C. [Figure 5] 5 is a partially enlarged perspective view of a cross-sectional view of region D in FIG. 4 at position H1 in the up-down direction. [Figure 6] 5 is a partially enlarged perspective view of a cross-sectional view of region D in FIG. 4 at position H2 in the up-down direction. [Figure 7] 5 is a partially enlarged perspective view of a cross-sectional view of region D in FIG. 4 at position H3 in the up-down direction. [Figure 8] 5 is a diagram summarizing cross-sectional perspective views of region D in FIG. 4 at positions H1, H2, and H3 in the up-down direction. DETAILED DESCRIPTION OF THE INVENTION

[0012] An embodiment of a heat exchanger of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction indicated by the reference numerals. The heat exchanger is a device for exchanging heat between a first fluid to be cooled and a second fluid that cools the first fluid via a partition wall. The properties of the first and second fluids are not particularly limited and include all combinations, such as gas-gas, liquid-gas, and gas-liquid. The first and second fluids are, for example, water, oil, an organic medium, air, or helium gas. Furthermore, the device in which the heat exchanger is installed is not particularly limited and includes all products, such as vehicles, general-purpose equipment, aircraft, and home appliances. In the following embodiment, a radiator installed in a vehicle will be described as an example of the heat exchanger of the present invention. That is, in the following embodiment, the first fluid is cooling water that cools the vehicle's drive source, and the second fluid is air (driving wind).

[0013] FIG. 1 is a perspective view of a radiator 1 according to an embodiment of the present invention. FIG. 2 is a partial perspective view of the radiator 1 of FIG. 1, exposing a cross section taken along line AA in FIG. 1. FIG. 3(A) is a partial cross-sectional view of a portion of the cross section taken along line BB in FIG. 1. For simplicity and clarity of explanation, the present specification will describe the radiator 1 using an orthogonal coordinate system with three directions: front-to-back, left-to-right, and up-down, as shown in FIG. 1. Note, however, that these directions are unrelated to the directions when the radiator 1 is mounted on a device. In the drawings, up is designated as U, down is designated as D, left is designated as L, right is designated as R, front is designated as Fr, and rear is designated as Rr.

[0014] The radiator 1 includes a core section 3, a refrigerant flow path 5 provided in the core section 3 and through which coolant flows, and an air flow path 7 provided in the core section 3 and through which air flows. In the core section 3 of the radiator 1, the coolant flowing through the refrigerant flow path 5 and the air flowing through the air flow path 7 exchange heat through a partition wall 54 (described later). This differs from conventional plate-type radiators that separate fluids with flat plates (with additional heat transfer fins in some cases) and fin-tube radiators that exchange heat through thermal conduction with flat fins around a circular tube. The core section 3 has an inlet pipe 11 provided at the top of its rear surface and an outlet pipe 13 provided at the bottom of its front surface. The inlet pipe 11 and outlet pipe 13 are connected to the refrigerant flow path 5 of the core section 3.

[0015] As indicated by arrow P, cooling water is introduced into the core section 3 from the outside through an inlet pipe 11 provided in the core section 3, flows from top to bottom through the refrigerant flow path 5 within the core section 3, and is then discharged to the outside through an outlet pipe 13 provided in the core section 3. On the other hand, air is introduced into the core section 3 from the bottom surface of the core section 3 as indicated by arrow Q, flows from bottom to top through the air flow path 7 within the core section 3, and is then discharged from the top surface of the core section 3. The refrigerant flow path 5 and the air flow path 7 are tubular flow paths arranged in a regular pattern. Here, a tubular flow path refers to a pipe-like flow path having a closed cross-sectional shape formed by a circular arc or a polygon.

[0016] 2, the refrigerant flow path 5 includes a plurality of main flow paths 51 extending in the vertical direction and aligned in the front-to-rear direction, an inlet chamber 52 communicating with the plurality of main flow paths 51 arranged in the front-to-rear direction and extending in the front-to-rear direction, and a discharge chamber 53 communicating with the plurality of main flow paths 51 arranged in the front-to-rear direction and extending in the front-to-rear direction. When the refrigerant flow path 5 includes a plurality of main flow paths 51 aligned in the front-to-rear direction and an inlet chamber 52 and a discharge chamber 53 communicating with the main flow path 51, the refrigerant flow path 5 has a plurality of such sets arranged in the left-to-right direction. Therefore, as shown in FIG. 3(A), the main flow paths 51 are regularly arranged in a checkerboard pattern in the vertical cross section.

[0017] 3A, the main flow path 51 has a cross-shaped flow path cross section in which a space extending in the front-rear direction and a space extending in the left-right direction intersect in a cross shape. Note that the shape of the main flow path 51 is not limited to this, and it may be any shape such as a square, rectangle, diamond, trapezoid, circle, ellipse, star, triangle, polygon with pentagons or more sides, or other geometric patterns.

[0018] The inlet chamber 52 communicates with the inlet pipe 11 , and the outlet chamber 53 communicates with the outlet pipe 13 .

[0019] 2, the main flow path 51 is provided at its upper end with an inlet-side shape-changing section 55 in which the shape of the cross section of the flow path gradually changes toward the inlet chamber 52 and is connected linearly to adjacent main flow paths 51, and at its lower end with a discharge-side shape-changing section 56 in which the shape of the cross section of the flow path gradually changes toward the discharge chamber 53 and is connected linearly to adjacent main flow paths 51. The inlet-side shape-changing section 55 and the discharge-side shape-changing section 56 will be described later.

[0020] As shown in FIG. 3A, the air flow path 7 has a plurality of flow paths 7a formed by being surrounded by partition walls 54 that define the main flow path 51. The flow paths 7a to 7d and 7A to 7D (hereinafter, when there is no need to distinguish between the flow paths, they will be referred to simply as 7a) extend in the vertical direction, are surrounded by the main flow path 51 of the refrigerant flow path 5, and exist in multiple locations in the front-rear and left-right directions. The partition walls 54 may be composed of only straight lines, or may include curved lines, or may be composed of only curved lines. Furthermore, the main flow path 51 of the refrigerant flow path 5 and the flow paths 7a of the air flow path 7 do not necessarily need to be adjacent to each other across the partition wall 54, and there may be a region where the flow paths 7a of the air flow path 7 are adjacent to each other. The flow paths 7a communicate with the outside from the upper surface of the core section 3 and also communicate with the outside from the lower surface of the core section 3. As a result, air is introduced into the core portion 3 from the underside of the core portion 3, as shown by arrow Q in Figure 1, flows from bottom to top through the air flow path 7 within the core portion 3, and then is discharged from the top surface of the core portion 3.

[0021] Furthermore, twisted ribbon 15 shown in Fig. 3A is integrally provided inside flow path 7a. As shown in Fig. 3B, twisted ribbon 15 is configured by twisting a thin plate to one side in the circumferential direction around an axis extending in the vertical direction, and improves the heat exchange rate by stirring the air flowing inside flow path 7a.

[0022] 3A, the twisted ribbon 15 is arranged so that the twist phases of the air flow paths 7A, 7B, 7C, and 7D aligned in the left-right direction are different, and the twist phases of the air flow paths aligned in the front-rear direction are the same. Note that the twist phase can be set as appropriate.

[0023] 4 to 7, the inlet-side shape-changing section 55 provided at the upper end of the main flow path 51 of the refrigerant flow path 5 will be described in detail below. The discharge-side shape-changing section 56 provided at the lower end of the main flow path 51 of the refrigerant flow path 5 has a similar structure to the inlet-side shape-changing section 55, and therefore a detailed description thereof will be omitted.

[0024] The inlet-side shape-changing section 55 of the main channel 51 has a cross-sectional shape that gradually changes toward the inlet chamber 52 and is connected to adjacent main channels 51 in a straight line.

[0025] FIG. 4 is a view of area D in FIG. 2 as viewed from direction C. Area D corresponds to the upper ends of the refrigerant flow path 5 and the air flow path 7. FIG. 5 shows a partially enlarged perspective cross-sectional view at vertical position H1 in FIG. 4. Similarly, FIG. 6 shows a partially enlarged perspective cross-sectional view at vertical position H2 in FIG. 4, FIG. 7 shows a partially enlarged perspective cross-sectional view at vertical position H3 in FIG. 4, and FIG. 8 is a summary of the perspective cross-sectional views of area D in FIG. 4 at vertical positions H1, H2, and H3. Note that the twisted ribbon 15 is omitted from FIGS. 5 to 8.

[0026] The partial enlarged view H1 in Figure 5 shows the enlarged view at the lowest vertical position H1 of the three enlarged views, which is the start point of the inlet-side shape change section 55. At the vertical position H1, the refrigerant flow path 5 has the shape shown in Figure 3(A). That is, the main flow path 51 of the refrigerant flow path 5 has a cross-shaped flow path cross section. It is independent of the adjacent main flow paths 51 in the front-rear and left-right directions.

[0027] The partial enlarged view H2 in FIG. 6 is an enlarged view at the middle position, vertical position H2, among the three enlarged views, and shows the middle part of the introduction-side shape-changing section 55. The flow path cross section at vertical position H2 has a cross-shaped flow path cross section at vertical position H1 (FIG. 5) such that the length of the flow path extending in the front-rear direction increases and the width increases, and the length of the flow path extending in the left-right direction decreases and the width decreases, as the flow path cross section at vertical position H2 moves further toward the introduction chamber 52 (above). A communication passage S is gradually provided between adjacent main flow paths 51 in the front-rear direction. The flow path cross section at vertical position H2 has a cross-shaped flow path cross section at vertical position H2 such that the length of the flow path extending in the front-rear direction increases and the width increases, and the length of the flow path extending in the left-right direction decreases and the width decreases, as the flow path cross section moves further toward the introduction chamber 52 (above).

[0028] Here, the cross-sectional area of ​​the main flow path 51 is constant throughout the inlet-side shape-changing section 55. That is, although the shape of the flow path cross-section gradually changes throughout the inlet-side shape-changing section 55, the cross-sectional area of ​​the flow path cross-section does not change. This allows the cooling water to flow more smoothly, and suppresses the occurrence of pressure loss.

[0029] The partial enlarged view H3 in FIG. 7 is the uppermost enlarged view of the three enlarged views at the vertical position H3, which is the end point of the inlet-side shape change section 55. The cross section of the flow path at the vertical position H3 is connected to the adjacent main flow path 51 and forms a straight line in the front-to-rear direction. In other words, the communication path S becomes indistinguishable from the flow path extending in the front-to-rear direction, and the flow path extending in the left-to-right direction disappears. The straight flow path shown in FIG. 7 communicates with the introduction chamber 52 located further above.

[0030] In this way, the inlet-side shape-changing section 55 gradually changes the flow path cross section of the main flow path 51, connecting adjacent main flow paths 51 in a straight line and communicating with the inlet chamber 52, thereby not impeding the flow of air passing through the flow path 7a of the air flow path 7 formed between the main flow paths 51. Therefore, the flow of air is not obstructed near the inlet of the main flow path 51.

[0031] Although detailed explanation will be omitted, the discharge-side shape-changing section 56 of the main flow path 51 also gradually changes the shape of its cross section toward the discharge chamber 53, connecting it to adjacent main flow paths 51 in a straight line. Therefore, the discharge-side shape-changing section 56 gradually changes the cross section of the main flow path 51, connecting it to adjacent main flow paths 51 in a straight line, and communicating with the discharge chamber 53 does not impede the flow of air passing through flow path 7a of the air flow path 7 formed between the main flow paths 51. Therefore, the flow of air is not impeded near the outlet of the main flow path 51. Air that has flowed into flow path 7a of the air flow path 7 from the gap in the introduction chamber 52 is agitated as it flows through flow path 7a while being guided by the twisted ribbon 15, and is then discharged to the outside through the gap in the discharge chamber 53.

[0032] Furthermore, by changing only the shape while maintaining the same cross-sectional area of ​​the flow passage in the inlet-side shape-changing section 55 and the outlet-side shape-changing section 56, an increase in pressure loss of the cooling water can be avoided.

[0033] Furthermore, it is preferable that the core portion 3 of the radiator 1 of this embodiment be manufactured using additive manufacturing technology (hereinafter referred to as AM technology), which can produce parts with complex three-dimensional shapes by layering and solidifying a specified powder material one layer at a time. This makes it possible to produce parts with fine and complex three-dimensional shapes that are difficult to produce using conventional manufacturing methods such as machining and casting. It also makes it possible to reduce the size of the radiator 1.

[0034] Furthermore, not only the core part 3, but also the inlet pipe 11 and the outlet pipe 13 can be manufactured integrally with the core part 3 using AM technology. If the core part 3, the inlet pipe 11, and the outlet pipe 13 were manufactured separately, a process of assembling the inlet pipe and the outlet pipe to the core part 3 was required, but by manufacturing them integrally using AM technology, this process can be omitted. The specified powder material may be resin or metal.

[0035] Although one embodiment of the present invention has been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such an embodiment. It is clear that a person skilled in the art can conceive of various modifications or alterations within the scope of the claims, and it is understood that these also naturally fall within the technical scope of the present invention. Furthermore, the components of the above embodiment may be combined in any manner without departing from the spirit of the invention.

[0036] For example, in the above embodiment, the radiator 1 having the box-shaped core portion 3 is exemplified, but the core portion 3 may have a complex shape such as a three-dimensional curved shape created by AM technology.

[0037] This specification describes at least the following: In parentheses, components corresponding to those in the above-described embodiments are shown as examples, but the present invention is not limited to these.

[0038] (1) a core portion (core portion 3); a first flow path (coolant flow path 5) provided in the core portion and through which a first fluid (coolant) flows; a second flow path (air flow path 7) provided in the core portion and through which a second fluid (air) flows; In the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall (partition wall 54), the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths (main flow paths 51) extending in a first direction (vertical direction) and arranged side by side in a second direction (front-rear direction), an introduction chamber (introduction chamber 52) communicating with the plurality of main flow paths and extending in the second direction; a discharge chamber (discharge chamber 53) communicating with the plurality of main flow paths and extending in the second direction, The main flow path is an inlet-side shape change section (inlet-side shape change section 55) in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected linearly to the adjacent main flow path; a discharge side shape change section (discharge side shape change section 56) in which the shape of the specified flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path.

[0039] According to (1), the shape-changing section gradually changes the flow path cross section of the main flow path, and the adjacent main flow paths are connected in a straight line, so that the flow of the second fluid is not obstructed near the inlet / outlet of the main flow path.

[0040] (2) The heat exchanger according to (1), In the inlet-side shape-changing section and the inlet-side shape-changing section, the shape of the flow path cross section changes while maintaining the cross-sectional area of ​​the flow path.

[0041] According to (2), the fluid can flow more smoothly.

[0042] (3) The heat exchanger according to (1) or (2), A heat exchanger, wherein the predetermined flow path cross section is a cross shape.

[0043] According to (3), the contact area with the second fluid can be increased.

[0044] (4) The heat exchanger according to any one of (1) to (3), The first flow path is the plurality of main flow paths, the plurality of introduction chambers, and the plurality of discharge chambers are provided in a third direction (left-right direction) perpendicular to the first direction and the second direction, a heat exchanger, wherein the second flow path has a plurality of flow paths formed by being surrounded by the partition walls that constitute the plurality of main flow paths;

[0045] According to (4), the flow path of the second flow path is formed by being surrounded by the partition walls that form the plurality of main flow paths, so that the heat exchanger can be made smaller.

[0046] (5) The heat exchanger according to (4), a heat exchanger including a region where the second flow paths are adjacent to each other with the partition wall interposed therebetween;

[0047] According to (5), the degree of freedom in forming the flow path is improved.

[0048] (6) The heat exchanger according to any one of (1) to (5), A heat exchanger, wherein the second flow path is provided with a twisted ribbon (twisted ribbon 15).

[0049] According to (6), the heat exchange efficiency is improved by stirring the flow of the second fluid.

[0050] (7) A heat exchanger according to any one of (1) to (6), A heat exchanger, wherein the core portion is integrally formed by additive manufacturing.

[0051] According to (7), it is possible to produce parts with fine and complex three-dimensional shapes that were difficult to produce using conventional manufacturing methods such as machining and casting.

[0052] (8) The heat exchanger according to (7), an introduction pipe (introduction pipe 11) communicating with the introduction chamber; a discharge pipe (discharge pipe 13) communicating with the discharge chamber; The heat exchanger, wherein the core portion, the inlet pipe, and the outlet pipe are integrally formed by additive manufacturing.

[0053] According to (8), the process of assembling the inlet pipe and the outlet pipe to the core part can be omitted.

[0054] (9) a core portion (core portion 3); a first flow path (coolant flow path 5) provided in the core portion and through which a first fluid (coolant) flows; a second flow path (air flow path 7) provided in the core portion and through which a second fluid (air) flows; A method for manufacturing a heat exchanger (radiator 1), in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is a plurality of main flow paths (cross flow paths) extending in a first direction and having a predetermined flow path cross section; an introduction chamber (introduction chamber 52) extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths; a discharge chamber (discharge chamber 53) extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths, The main flow path is an inlet-side shape change section (inlet-side shape change section 55) in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected linearly to the adjacent main flow path; a discharge-side shape change section (discharge-side shape change section 56) in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The manufacturing method for a heat exchanger includes a step of integrally molding the core portion by additive manufacturing.

[0055] According to (9), it is possible to manufacture parts with intricate and complex three-dimensional shapes that are difficult to manufacture using conventional manufacturing methods such as machining and casting. In addition, in a heat exchanger manufactured by this manufacturing method, the flow path cross section of the main flow path gradually changes due to the shape change section to become an inlet chamber or an outlet chamber, so the flow of the second fluid is not obstructed near the inlet and outlet of the main flow path.

[0056] (10) A method for manufacturing the heat exchanger according to (9), The heat exchanger comprises: an introduction pipe (introduction pipe 11) communicating with the introduction chamber; a discharge pipe (discharge pipe 13) communicating with the discharge chamber; The manufacturing method of a heat exchanger includes a step of integrally molding the core portion, the inlet pipe, and the outlet pipe by additive manufacturing.

[0057] According to (10), the process of assembling the inlet pipe and the outlet pipe to the core part can be omitted. [Explanation of symbols]

[0058] 1 Radiator (heat exchanger) 3 Core 5 Refrigerant flow path (first flow path) 7 Air flow path (second flow path) 11 Inlet pipe 13 Exhaust pipe 15 Twisted Ribbon 51 Main channel 52 Inlet chamber 53 Exhaust chamber 54 Bulkhead 55 Entry side shape change section 56 Discharge side shape change section

Claims

1. A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows, a heat exchanger in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The introduction side shape change section and the discharge side shape change section are A heat exchanger in which the shape of a predetermined cross section of each of the main flow paths becomes longer in the direction in which the main flow paths adjoin each other from the start point of a shape-changing section to the end point where the main flow paths are connected in a straight line, thereby gradually forming a communicating passage between the adjacent main flow paths and the adjacent main flow paths being connected in a straight line at the end point.

2. A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows, a heat exchanger in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, In the inlet-side shape-changing section and the outlet-side shape-changing section, the shape of the predetermined flow path cross section changes while maintaining the cross-sectional area of ​​the flow path.

3. A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows, a heat exchanger in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, A heat exchanger, wherein the predetermined flow path cross section is a cross shape.

4. A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows, a heat exchanger in which, in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The first flow path is a third direction perpendicular to the first direction and the second direction, the third direction including a plurality of the main flow paths, the introduction chambers, and the discharge chambers; The second flow path has a plurality of flow paths formed by being surrounded by the partition walls that form the plurality of main flow paths.

5. 5. The heat exchanger according to claim 4, a region where the second flow paths are adjacent to each other with the partition wall interposed therebetween;

6. 2. The heat exchanger of claim 1, The heat exchanger, wherein the second flow path is provided with a twisted ribbon.

7. 7. A heat exchanger according to any one of claims 1 to 6, A heat exchanger, wherein the core portion is integrally formed by additive manufacturing.

8. 8. The heat exchanger of claim 7, an introduction pipe communicating with the introduction chamber; a discharge pipe communicating with the discharge chamber; The heat exchanger, wherein the core portion, the inlet pipe, and the outlet pipe are integrally formed by additive manufacturing.

9. A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows, a heat exchanger manufacturing method, wherein in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is a plurality of main flow paths extending in a first direction and having predetermined flow path cross sections; an introduction chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths; a discharge chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths, The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The introduction side shape change section and the discharge side shape change section are From the start point of the shape-changing section to the end point where the main flow paths are linearly connected to the adjacent main flow paths, the shape of the predetermined flow path cross section of each of the main flow paths becomes longer in the direction in which the main flow paths are adjacent to each other, so that a communication path is gradually formed between the adjacent main flow paths, and the main flow paths are linearly connected at the end point, The manufacturing method for a heat exchanger includes a step of integrally molding the core portion by additive manufacturing.

10. A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows, a heat exchanger manufacturing method, wherein in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is a plurality of main flow paths extending in a first direction and having predetermined flow path cross sections; an introduction chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths; a discharge chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths, The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, the inlet-side shape-changing section and the outlet-side shape-changing section change the shape of the predetermined flow path cross section while maintaining the cross-sectional area of ​​the flow path, The manufacturing method for a heat exchanger includes a step of integrally molding the core portion by additive manufacturing.

11. A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows, a heat exchanger manufacturing method, wherein in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is a plurality of main flow paths extending in a first direction and having predetermined flow path cross sections; an introduction chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths; a discharge chamber extending in the second direction and communicating with a plurality of the main flow paths arranged in the second direction among the plurality of main flow paths, The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, the predetermined flow path cross section is cross-shaped, The manufacturing method for a heat exchanger includes a step of integrally molding the core portion by additive manufacturing.

12. A core portion, a first flow path provided in the core portion and through which a first fluid flows; a second flow path provided in the core portion and through which a second fluid flows, a heat exchanger manufacturing method, wherein in the core portion, the first fluid flowing through the first flow path and the second fluid flowing through the second flow path exchange heat through a partition wall, the first flow path and the second flow path are tubular flow paths arranged regularly, The first flow path is A plurality of main flow paths extending in a first direction and aligned in a second direction; an introduction chamber communicating with the plurality of main channels and extending in the second direction; a discharge chamber communicating with the plurality of main flow paths and extending in the second direction; The main flow path is an inlet-side shape change section in which the shape of a predetermined flow path cross section gradually changes toward the inlet chamber and is connected to the adjacent main flow path in a straight line; a discharge-side shape change section in which the shape of the predetermined flow path cross section gradually changes toward the discharge chamber and is connected linearly to the adjacent main flow path, The first flow path is a third direction perpendicular to the first direction and the second direction, the third direction including a plurality of the main flow paths, the introduction chambers, and the discharge chambers; the second flow path has a plurality of flow paths formed by being surrounded by the partition walls that configure the plurality of main flow paths, The manufacturing method for a heat exchanger includes a step of integrally molding the core portion by additive manufacturing.

13. A method for manufacturing a heat exchanger according to claim 9, comprising the steps of: The heat exchanger comprises: an introduction pipe communicating with the introduction chamber; a discharge pipe communicating with the discharge chamber; The manufacturing method of a heat exchanger includes a step of integrally molding the core portion, the inlet pipe, and the outlet pipe by additive manufacturing.

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