JP4640183B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger for cooling a heating element composed of electronic components and the like, and more particularly to a heat exchanger for cooling a heating element using forced convection.

  In the conventional heat exchanger, a turbulent flow promoting body having a protrusion is provided on the inner surface of the heat transfer container through which the fluid flows, and this protrusion causes a three-dimensional flow in the heat transfer container, thereby forcing the fluid. In addition to convective heat transfer and sensible heat change of fluids, there is one that improves heat exchange characteristics by a stirring effect (see, for example, Patent Document 1).

  In addition, the heat is configured so that the fluid flows through both surfaces of the corrugated inner fin mounted in the heat exchange flow path through which the fluid flows, and the heat transfer section and the fluid exchange heat in both flow paths. There is also an exchanger (see, for example, Patent Document 2). In such a heat exchanger, protrusions are provided at four corners in the heat exchange flow path to which the inner fin is attached, and positioning is performed so that the inner fin does not move.

Japanese Patent Laying-Open No. 2005-302898 (page 4-9, FIG. 1) JP-A-6-123578 (5th page, FIG. 1 and FIG. 3)

  However, in a heat exchanger such as Patent Document 1, the turbulence promoter moves not only in the fluid flow direction but also in the direction perpendicular to the fluid flow direction due to the fluid flow, and has a desired high heat transfer characteristic. There was a problem that the position of the region that should be could not be defined, and the heat exchange characteristics deteriorated. Moreover, in the heat exchanger like patent document 2, there existed a problem that a heat exchanger became large by the width | variety of protrusion.

  The present invention has been made to solve the above-described problems, and an object thereof is to obtain a heat exchanger that is small in size and has good heat exchange characteristics.

  Also, a heat transfer wall that transfers heat from the heating element to the fluid, a non-heat transfer wall installed opposite the heat transfer wall, and both ends of the non-heat transfer wall between the heat transfer wall and the non-heat transfer wall And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, and is installed between the heat transfer wall and the non-heat transfer wall. The heat exchanger includes a plurality of turbulent flow promoting bodies and constitutes a flow path through which fluid flows between the heat transfer wall, the substrate, and the side wall, and the non-heat transfer wall is positioned to protrude on a surface facing the substrate The positioning protrusion is disposed between the plurality of turbulence promoting bodies or between the side wall and the turbulent flow promoting body.

  According to this invention, it is possible to provide a heat exchanger that is small and has good heat exchange characteristics.

Embodiment 1 FIG.
1 is a cross-sectional view schematically showing a heat exchanger according to Embodiment 1 of the present invention. FIG. 1 (a) is a cross-sectional view of a heat exchange passage, and FIG. 1 (b) is a cross-sectional view of FIG. ) In FIG. 1A is a cross-sectional view taken along the line AA of FIG. 1A, and FIG. FIG. 2 is a diagram showing the configuration of the turbulent flow promoting body of the heat exchanger according to Embodiment 1 of the present invention, FIG. 2 (a) is a bottom view of the turbulent flow promoting body, and FIG. These are sectional drawings in the CC cross section of Fig.2 (a). FIG. 3 is a view showing the configuration of the non-heat transfer section of the heat exchanger according to Embodiment 1 of the present invention, FIG. 3 (a) is a top view of the non-heat transfer section, and FIG. 3 (b) These are sectional drawings in the DD section of Drawing 3 (a). In the drawings, the same reference numerals denote the same or corresponding parts, and this is common throughout the entire specification. Furthermore, the form of the constituent elements appearing in the whole specification is merely an example, and is not limited to these descriptions.

  As shown in FIGS. 1 to 3, the heat exchanger 1 is a plate-like heat transfer wall 3 that receives heat from a heating element and transfers the heat to a fluid, and a non-conducting heat that constitutes the outer wall of the heat exchanger 1 together with the heat transfer wall 3. It has a turbulent flow promoting body 5 that stirs the heat section 4 and fluid to promote heat transfer. The non-heat transfer section 4 includes a plate-like non-heat transfer wall 11 and two side walls 12 provided perpendicularly to both ends of the plate-like non-heat transfer wall 11. The wall 11 and the heat transfer wall 3 are disposed so as to face each other. The turbulent flow promoting body 5 is disposed between the heat transfer wall 3 and the non-heat transfer portion 4, and is vertically connected to the plate-like substrate 7 and the substrate 7 installed in contact with the non-heat transfer wall 11. And a plurality of cylindrical projections 6. The height from the lower surface of the substrate 7 to the tip of the protrusion 6 is substantially equal to the height from the upper surface of the non-heat transfer wall 11 to the upper surface of the side wall 12. Further, a cylindrical positioning projection 8 a for determining the position of the turbulence promoting body 5 is provided perpendicularly to the non-heat transfer wall 11 on the surface of the non-heat transfer wall 11 facing (contacting) the substrate 7. It has been. In addition, a positioning recess 9 a that is recessed in a cylindrical shape for determining the position of the turbulence promoting body 5 is provided perpendicularly to the substrate 7 on the surface facing (in contact with) the non-heat transfer wall 11 of the substrate 7. . The positioning projection 8 a of the non-heat transfer wall 11 is accommodated in the positioning recess 9 a of the substrate 7, and determines the position of the turbulence promoting body 5 in the heat exchanger 1. The heat transfer wall 3, the side wall 12 of the non-heat transfer section 4, and the turbulence promoting body 5 constitute a flow path 2 through which fluid flows. In addition, although a heat generating body is not shown in figure, it is installed in the surface on the opposite side to the non-heat-transfer part 4 of the heat-transfer wall 3. FIG.

  Next, operation | movement of the heat exchanger 1 of this Embodiment 1 is demonstrated. In FIG. 1, white arrows indicate the flow direction of the fluid and are parallel to the side wall 12. 1 to 3, the fluid fed into the heat exchanger 1 flows through the flow path 2 while avoiding the protrusions 6 provided on the substrate 7 and is agitated. At that time, the heat transfer wall 3 and the fluid exchange heat due to the temperature difference between the fluid and the heat transfer wall 3, and the temperature of the heat transfer wall 3 approaches the temperature of the fluid, while the temperature of the fluid is the heat transfer wall 3. The fluid is delivered from the heat exchanger 1.

  In the heat exchanger 1 according to Embodiment 1 of the present invention, the positioning protrusion 8a is accommodated in the positioning recess 9a, and the position of the turbulent flow promoting body 5 is defined. The movement of the flow promoting body 5 can be suppressed, and the movement of the turbulent flow promoting body 5 in the direction orthogonal to the fluid flow direction (the width direction of the heat exchanger 1) can also be suppressed. Therefore, since the area | region which shows the high heat transfer characteristic with which the turbulent flow promoting body 5 was mounted | worn can be prescribed | regulated more reliably, a heat exchange characteristic improves. Further, it is possible to suppress the turbulent flow promoting body 5 from deviating from a desired position and deteriorating the flow characteristics of the heat exchanger 1 (increasing pressure loss). Further, when a plurality of turbulent flow promoting bodies 5 are mounted in the heat exchanger 1, workability when mounting the turbulent flow promoting bodies 5 is ensured by positioning each of the turbulent flow promoting bodies 5 with certainty. There is also an effect of improving.

  Further, unlike the conventional heat exchanger in which the positioning projection provided on the outer side of the inner fin mounting position is in contact with the corner portion of the inner fin, the heat exchanger 1 according to the first embodiment of the present invention is used for positioning. The protrusion 8a is configured to be accommodated in the positioning recess 9a. Therefore, the heat exchanger can be reduced in size by the width of the positioning projection 8a than the heat exchanger provided with only the positioning projection 8a without providing the positioning recess 9a. Therefore, since the mounting ratio of the turbulence promoting body 5 per unit volume can be improved, the heat exchange characteristics of the heat exchanger 1 can be improved.

  Although FIG. 1 schematically shows the heat exchanger 1, a fluid inlet and a fluid outlet are directly provided in the heat exchanger 1, or a fluid inlet and a fluid outlet are respectively provided via a diversion header and a merging header. An exit may be provided. In addition, a plurality of heat exchangers 1 may be connected in parallel or in series via a connection channel (or connection port), or may be a laminated structure for further miniaturization.

  As shown in FIGS. 1 to 3, the heat exchanger 1 includes a non-heat transfer section 4 and a flat heat transfer wall 3 that form a U-shaped cross section with a non-heat transfer wall 11 and two side walls 12. However, it is not particularly limited to this configuration. The shape of the cross section perpendicular to the fluid flow direction of the flow path 2 may be a triangle, a rectangle, a circle, a semicircle, or the like, and the shape of the cross section perpendicular to the fluid flow direction of the flow path 2 and the heat exchanger 1. The plurality of flow paths 2 may be formed in the heat exchanger 1 without the need to match the outer shape of the heat exchanger 1. Furthermore, the heat exchanger 1 may be an integral configuration, a divided configuration, or a configuration having a partial opening. When the heat exchanger 1 has a partial opening, the opening is covered with a lid (for example, The structure covered with the heat transfer wall 3) may be used as long as the fluid can flow without leaking to the outside of the heat exchanger 1. Further, the side wall 12 does not need to be perpendicular to the non-heat transfer wall 11 and may be inclined with respect to the non-heat transfer wall 11.

  On the surface of the heat transfer wall 3 opposite to the non-heat transfer wall 11, there is a structure (for example, a heater, an electronic device, a heating element such as an electronic component, a heating element in which these are integrated, and heat from the heating element. The heat radiating part of the equipment to be transported, the heat exchanger, the heat receiving part of the heat transport equipment as the heat absorption source, the heat sink, etc.) or the ambient air or the heat exchange fluid are directly or thermally joined to each other via the heat transfer wall 3 As long as the structure or fluid and the fluid flowing through the flow path 2 can exchange heat, the external configuration, shape, dimensions, and the like are not particularly limited.

  The material of the heat transfer wall 3 is desirably made of a material that does not allow fluid to pass through and has high thermal conductivity, and metals such as copper and aluminum, alloys thereof, ceramics, and the like are used. On the other hand, the material of the non-heat transfer wall 11 and the side wall 12 of the non-heat transfer part 4 may be any material that does not allow fluid to pass through. Nate) or the like. In addition, when the heat transfer wall 3 and the non-heat transfer part 4 are divided and configured, the heat transfer wall 3 and the non-heat transfer part 4 are welded, soldered, brazed, pressed, welded, and bonded. The bonding method is not particularly limited as long as fluid leakage can be prevented.

  As shown in FIG. 1 and FIG. 2, the substrate 7 of the turbulent flow promoting body 5 is shown as a flat plate, but is connected to the protrusion 6 and substantially matches the non-heat transfer wall 11 and is installed in the heat exchanger 1. Any shape may be used, and the shape, dimensions, and the like are not particularly limited. The protrusion 6 is shown as a cylinder in FIG. 1, but may be a flat plate, a quadrangular prism, a cone, a sphere, a hemisphere, or the like. Further, the protrusion 6 is not particularly required to be an axially symmetric shape or a line target shape, and does not need to be installed perpendicularly to the substrate 7, and may be any as long as it serves to agitate the flowing fluid. The protrusion 6 and the substrate 7 do not have to be made of the same material, and may be made of different materials, or may be made of a metal such as copper or aluminum, or a non-metal such as ceramic or resin. Therefore, the protrusion 6 does not need to be formed integrally with the substrate 7 and may be attached to the substrate 7 by a structure such as a screw.

  The positioning protrusion 8a and the positioning recess 9a are provided between the substrate 7 and the non-heat transfer section 4, and may be any configuration as long as the positioning protrusion 8a is accommodated in the positioning recess 9a. . The positioning recess 9a provided in the substrate 7 may be a hole penetrating the substrate 7. When the positioning recess 9a is a through hole, the positioning protrusion 8a protrudes from the surface of the substrate 7. May be. In FIGS. 1 to 3, a positioning protrusion 8 a and a positioning recess 9 a are disposed between the plurality of protrusions 6. However, the positioning protrusion 8 a and the positioning recess 9 a may be disposed immediately below the protrusion 6, and the positioning protrusion 8 a and the positioning recess 9 a may be disposed inside the protrusion 6. Further, in FIG. 1 to FIG. 3, two positioning protrusions 8 and two positioning recesses 9 are provided, but the number and mounting position of each are not particularly limited. Further, the positioning protrusion 8a does not need to be formed integrally with the non-heat transfer wall 11, and may be attached to the non-heat transfer wall 11 by a structure such as a screw.

  The cross-sectional shape of the positioning protrusion 8a does not have to be particularly circular, and may be a triangle or a rectangle. Further, it is not particularly necessary to have a columnar shape, and may be a conical shape or a protruding shape in which any part of the side surface is inclined. Further, the positioning recess 9a has a shape and size that accommodates the positioning projection 8a and can suppress the movement of the substrate 7 on the non-heat transfer section 4 by the positioning projection 8a and the positioning recess 9a. I just need it. The positioning protrusion 8a and the non-heat transfer portion 4 do not have to be integrated, and the positioning protrusion 8a may be fixed to the non-heat transfer portion 4 or provided on the non-heat transfer portion 4. The positioning protrusion 8a may be mounted in the mounting recess, and the positioning protrusion 8a and the non-heat transfer section 4 may be made of different materials.

  The fluid flowing in the passage 2 is a liquid such as distilled water, antifreeze, oil, liquefied carbon dioxide, alcohol or ammonia, or a gas such as air or nitrogen gas.

  4 is a cross-sectional view schematically showing another example of the heat exchanger according to Embodiment 1 of the present invention. FIG. 4 (a) is a cross-sectional view of the heat exchanger, and FIG. 4A is a cross-sectional view taken along the line AA in FIG. 4A, and FIG. 4C is a cross-sectional view taken along the line BB in FIG. FIG. 5 is a diagram showing the configuration of the turbulent flow promoting body of the heat exchanger shown in FIG. 4, FIG. 5 (a) is a bottom view of the turbulent flow promoting body, and FIG. It is sectional drawing in the CC cross section of (a). 6 is a diagram showing the configuration of the non-heat transfer section of the heat exchanger shown in FIG. 4, FIG. 6 (a) is a top view of the non-heat transfer section, and FIG. 6 (b) is a diagram of FIG. It is sectional drawing in the DD cross section of (a).

  In the heat exchanger 1 shown in FIGS. 1 to 3, a positioning protrusion 8 a is provided on the surface of the non-heat transfer wall 11 facing the substrate 7, and the surface of the substrate 7 facing the non-heat transfer wall 11 is positioned. A recess 9a is provided. On the other hand, in the heat exchanger 1 shown in FIGS. 4 to 6, a positioning recess 9 b is provided on the surface of the non-heat transfer wall 11 that faces (contacts) the substrate 7, and faces the non-heat transfer wall 11 of the substrate 7. A positioning projection 8b is provided on the (contacting) surface. Other configurations and functions are the same as those of the heat exchanger 1 shown in FIGS. 1 to 3. Further, positioning protrusions 8 b having a larger cross section than that of the substrate 7 may be provided on the substrate 7. In addition, the board | substrate 7 itself may play the role of the protrusion 8b for positioning, and the positioning hollow 9b which can accommodate this board | substrate 7 itself may be provided in the non-heat-transfer wall 11. FIG. That is, the positioning recess 9b that accommodates the substrate 7 of the turbulence promoting body 5 may be provided in the non-heat transfer wall 11, and the substrate 7 may be mounted in the positioning recess 9b.

  7 and 8 are sectional views schematically showing another example of the heat exchanger according to Embodiment 1 of the present invention. 7A is a cross-sectional view of the heat exchanger, FIG. 7B is a cross-sectional view taken along the line AA in FIG. 7A, and FIG. 7C is a cross-sectional view taken along the line B- in FIG. It is sectional drawing in a B cross section, FIG.7 (d) is sectional drawing in the EE cross section of Fig.7 (a). 8A is a cross-sectional view of the heat exchanger, FIG. 8B is a cross-sectional view taken along the line AA of FIG. 8A, and FIG. 8C is a cross-sectional view of FIG. It is sectional drawing in a BB cross section.

  In the heat exchanger 1 shown in FIGS. 1 to 3, a positioning protrusion 8 a is provided on the surface of the non-heat transfer wall 11 facing the substrate 7, and the surface of the substrate 7 facing the non-heat transfer wall 11 is positioned. A recess 9a is provided. On the other hand, in the heat exchanger shown in FIG. 7, positioning protrusions 8 c are provided on the surface of the side wall 12 facing (contacting) the substrate 7, and the positioning recess 9 c is formed on the surface facing (contacting) the side wall 12 of the substrate 7. Is provided. Other configurations and functions are the same as those of the heat exchanger 1 shown in FIGS. 1 to 3.

  In the heat exchanger 1 shown in FIG. 7, the quadrangular prism positioning projection 8 c is provided perpendicular to the surface of the side wall 12 facing the substrate 7. Further, the rectangular columnar positioning recess 9 c is provided so as to be recessed perpendicularly to the surface facing the side wall 12 of the substrate 7. The positioning protrusion 8 c of the non-heat transfer wall 11 is accommodated in the positioning recess 9 c of the substrate 7, and determines the position of the turbulent flow promoting body 5 in the heat exchanger 1.

  In the heat exchanger 1 shown in FIG. 8, the fact that the quadrangular prism or triangular casting positioning projections 8d, 8e, and 8f are provided on the surface of the non-heat transfer wall 11 in contact with the substrate 7 is that from FIG. This is the same as the heat exchanger 1 shown in FIG. However, the plate-like substrate 7 is divided into four parts, and the positioning projections 8d, 8e, 8f are arranged between the plurality of divided substrates 7 so that the space between the substrate 7 and the side wall 12 is the same. Is different in that the protrusion 8g is disposed on the surface. Other configurations and functions are the same as those of the heat exchanger 1 shown in FIGS. 1 to 3.

Embodiment 2. FIG.
FIG. 9 is a cross-sectional view schematically showing a heat exchanger according to Embodiment 2 of the present invention, and FIG. 9A is a view of the heat exchanger before joining the heat transfer wall and the non-heat transfer portion. It is sectional drawing and FIG.9 (b) is sectional drawing of the heat exchanger after joining a heat-transfer wall and a non-heat-transfer part.

  In the heat exchanger 1 of the second embodiment, as shown in FIG. 9A, the height from the lower surface of the substrate 7 to the tip of the projection 6 (the height of the turbulent flow promoting body 5) is non-heat transfer. The height from the upper surface of the non-heat transfer wall 11 of the portion 4 to the upper surface of the side wall 12 (the internal height of the non-heat transfer portion 4) is set to be equal to or higher. Other configurations and functions are the same as those of the heat exchanger 1 shown in FIGS. 1 to 3 of the first embodiment. Here, the height of the turbulent flow promoting body 5 corresponds to a dimensional tolerance at the time of manufacture plus a plus tolerance added to the internal height of the non-heat transfer section 4. In addition, the surplus part in which the height of the turbulent flow promoting body 5 is larger than the internal height of the non-heat transfer section 4 is absorbed by the elastic deformation or plastic deformation (crushed) of the turbulent flow promoting body 5 (mainly the protrusion 6).

  In the heat exchanger 1 according to the second embodiment, the height of the turbulent flow promoting body 5 is set to be equal to or higher than the internal height of the non-heat transfer section 4, so that the heat transfer wall 3 and the non-heat transfer section 4 are joined. After that, the tip of the protrusion 6 is pressed against the lower surface of the heat transfer wall 3, and no gap is formed on the lower surface of the substrate 7 (the surface in contact with the non-heat transfer wall 11). Therefore, the fluid stirring effect generated around the protrusion 6 sufficiently acts on the heat transfer wall 3, so that the turbulence promoting body 5 has a lower height than the internal height of the non-heat transfer part 4. Heat exchange characteristics can be improved. In addition, since no gap is formed between the substrate 7 and the non-heat transfer wall 11, a bypass flow that flows through the gap does not occur, and the fluid that flows into the heat exchanger 1 is in contact with the heat transfer wall 3. 2 can flow through, and the deterioration of heat exchange characteristics due to the bypass flow can be suppressed. Furthermore, it is also possible to suppress variations among individual thermal characteristics and flow characteristics of the heat exchanger 1 caused by dimensional tolerance including flatness of each component constituting the heat exchanger 1 and variations in assembly.

Embodiment 3 FIG.
FIG. 10 is a cross-sectional view schematically showing a heat exchanger according to Embodiment 3 of the present invention, and FIG. 10 (a) is a view of the heat exchanger before joining the heat transfer section and the non-heat transfer section. It is sectional drawing and FIG.10 (b) is sectional drawing of the heat exchanger after joining a heat-transfer wall and a non-heat-transfer part.

  In the heat exchanger 1 according to Embodiment 1, the substrate 7 has a flat plate shape. In the heat exchanger 1 according to the third embodiment, the substrate 7 has a shape warped so that the upper surface is convex, and after joining the heat transfer wall 3 and the non-heat transfer portion 4, FIG. As shown, the tip of the protrusion 6 of the turbulence promoting body 5 is pressed against the lower surface of the heat transfer wall 3. Further, in the heat exchanger 1 shown in the third embodiment, unlike the heat exchanger 1 shown in the first embodiment and the heat exchanger 1 shown in the second embodiment, the substrate 7 is placed on the non-heat transfer wall 11. It is configured such that it can be moved slightly in the vertical direction without being bonded.

  In FIG. 10A, the substrate 7 is warped in a convex arch shape, and after the heat transfer portion 3 and the non-heat transfer portion 4 are joined by the warping force of the substrate 7, the protrusion 7 It is comprised so that the front-end | tip of 6 and the lower surface of the heat-transfer wall 3 may contact | connect. In FIG. 10A, the substrate 7 is shown as an upwardly convex warped shape, but may be downwardly convexly warped. Further, it is preferable that the ratio of the vertical and horizontal lengths of the substrate 7 is not 1 because warpage can be naturally generated during manufacturing.

  In the heat exchanger 1 shown in FIG. 10, since the substrate 7 is warped, the tip of the protrusion 6 is pressed against the lower surface of the heat transfer wall 3 after joining the heat transfer wall 3 and the non-heat transfer portion 4. In addition, no gap is formed on the lower surface of the substrate 7 (the surface in contact with the non-heat transfer wall 11). Therefore, as in the second embodiment, the fluid stirring effect generated around the protrusion 6 sufficiently acts on the heat transfer wall 3 and the heat exchange characteristics of the heat transfer wall 3 can be improved. In addition, it is possible to suppress variation among individual heat characteristics and flow characteristics of the heat exchanger 1 caused by dimensional tolerance including flatness of each component constituting the heat exchanger 1 and variation in assembly.

  FIG. 11 is a cross-sectional view schematically showing another example of the heat exchanger according to Embodiment 3 of the present invention, and FIG. 12 is a diagram showing the non-heat transfer portion of the heat exchanger shown in FIG. 11 as a configuration. It is. Fig.11 (a) is sectional drawing of the heat exchanger before joining a heat-transfer part and a non-heat-transfer part, FIG.11 (b) is after joining a heat-transfer wall and a non-heat-transfer part. It is sectional drawing of this heat exchanger. Fig.12 (a) is a top view of a non-heat-transfer part, FIG.12 (b) is sectional drawing in the DD cross section of Fig.12 (a).

  The heat exchanger 1 shown in FIG. 11 and FIG. 12 is provided with a pressing portion 10 (inclined surface) on the non-heat transfer portion 4 where the corner portion of the substrate 7 contacts, and the corner portion of the substrate 7 and the pressing portion 10 When the inclined surface comes into contact, an upward repulsive force is generated, and the tip of the protrusion 6 is pressed against the heat transfer wall 3. Therefore, after joining the heat transfer wall 3 and the non-heat transfer portion 4, the tip of the protrusion 6 is pressed against and contacts the lower surface of the heat transfer wall 3, and no gap is formed on the lower surface of the substrate 7. Therefore, the same effect as in the second embodiment can be obtained. In addition, in FIG. 11, although the pressing part 10 was shown as an inclined surface, a convex curved surface and a concave curved surface may be sufficient. Moreover, the position of the pressing part 10 is not limited to the corner | angular part of the non-heat-transfer part 4, You may provide continuously in a flow direction and may provide intermittently. Further, the corner portion of the substrate 7 where the substrate 7 and the pressing portion 10 contact each other may be an inclined surface, a convex curved surface, or a concave curved surface.

  Moreover, even if at least one of the surfaces in contact with the positioning projection 8a and the positioning recess 9a is a tapered surface, a repulsive force in the direction of the heat transfer wall 3 is generated, and the same effect is obtained. For example, a combination in which the positioning protrusion 8a and the positioning recess 9a have a conical shape, a combination in which the positioning protrusion 8a has a cylindrical shape and the positioning recess 9a has a conical shape, or the positioning protrusion 8a has a rectangular cross section. For example, the shape is a combination in which the positioning recess 9a has a triangular cross-sectional shape.

FIG. 13 is a sectional view schematically showing still another example of the heat exchanger according to Embodiment 3 of the present invention. FIG. 13A is a cross-sectional view of the heat exchanger before joining the heat transfer wall and the non-heat transfer part, and FIG. 13B is after joining the heat transfer wall and the non-heat transfer part. It is sectional drawing of this heat exchanger.
The heat exchanger shown in FIG. 13 is one in which an elastic body 13 is mounted between the substrate 7 and the non-heat transfer section 4, and the tip of the protrusion 6 is made lower by the elastic force of the elastic body 13 on the lower surface of the heat transfer wall 3. It is set as the structure pressed against. Therefore, after joining the heat transfer wall 3 and the non-heat transfer part 4, at least the tip of the protrusion 6 is in contact with the heat transfer wall 3 and no gap is formed on the lower surface of the substrate 7. Therefore, the same effect as the heat exchanger shown in FIG. 10 can be obtained.

  The elastic body 13 is elastically deformed, such as a spring structure such as a leaf spring or a coil spring, a rubber elastic body such as a rubber sheet or rubber particles, an adhesive that maintains elastic force, or an adhesive that contains rubber particles. As long as the substrate 7 and the protrusion 6 are pressed in the direction of the heat transfer wall 3, the material, shape, dimensions, and the like are not particularly limited. As shown in FIG. 14 described later, it is preferable to provide an elastic body housing recess for housing the elastic body, a protrusion for fixing the position of the elastic body 13, and a recess for housing the protrusion. By doing in this way, workability | operativity at the time of attaching the turbulent flow promoting body 5 and the elastic body 13 to the heat exchanger 1 improves.

  As described above, the heat exchanger 1 shown in the third embodiment of the present invention has the pressing means for pressing the tip of the protrusion 6 of the turbulence promoting body 5 against the heat transfer wall 3, so that the heat shown in FIG. The same effect as the exchanger 1 can be obtained. In addition, the heat exchanger 1 in which the elastic body 13 is mounted between the substrate 7 and the non-heat transfer section 4 includes the heat transfer wall 3 and the non-heat transfer section 4 as compared with the heat exchanger 1 shown in the second embodiment. Since the repulsive force generated when joining is small and easy to adjust, assembly is further facilitated. Note that, as shown in the second and third embodiments, the heat transfer wall 3 and the protrusion 6 of the turbulent flow promoting body 5 are surely in contact with or pressed against each other, so that heat transfer due to vibrations transmitted from the outside. The collision between the wall 3 and the protrusion 6 is suppressed, and damage to the heat transfer wall 3 and the tip of the protrusion 6 can be suppressed.

  Further, the heat exchanger 1 shown in FIG. 10 to FIG. 13 is provided with positioning protrusions 8a and positioning recesses 9a. Naturally, there are no positioning protrusions 8a and positioning recesses 9a. However, it is possible to press the tip of the protrusion 6 of the turbulent flow promoting body 5 against the heat transfer wall 3.

Embodiment 4 FIG.
FIG. 14 is a cross-sectional view schematically showing a configuration of a heat exchanger according to Embodiment 4 of the present invention, and FIG. 14 (a) is a cross-sectional view of the heat exchanger according to Embodiment 4 of the present invention. 14 (b) is a cross-sectional view taken along the line AA in FIG. 14 (a), and FIG. 14 (c) is a cross-sectional view taken along the line BB in FIG. 14 (a). 15 is a diagram showing the configuration of the turbulent flow promoting body of the heat exchanger shown in FIG. 14, FIG. 15 (a) is a bottom view of the turbulent flow promoting body, and FIG. 15 (b) is a plan view of FIG. It is sectional drawing in the CC cross section of (a). 16 is a diagram showing the configuration of the non-heat transfer section of the heat exchanger shown in FIG. 14, FIG. 16 (a) is a top view of the non-heat transfer section, and FIG. 16 (b) is a diagram of FIG. It is sectional drawing in the DD cross section of (a).

  In the heat exchanger 1 according to the fourth embodiment, a plate-like weir 15 is provided on the upper surface of the non-heat transfer wall 11 on the upstream side of the substrate 7 in a direction perpendicular to the fluid flow direction. The upper surface of the weir 15 and the upper surface of the substrate 7 are substantially at the same height. In addition, an elastic body housing recess 14 for housing the elastic body 13 is provided on the lower surface of the substrate 7. The position of the elastic body 13 is fixed by the elastic body housing recess 14, and workability when the elastic body 13 is attached is improved. In the heat exchanger 1 shown in the fourth embodiment, the elastic body accommodating recess 14 is provided on the lower surface of the substrate 7, but may be provided on the upper surface (surface facing the substrate 7) of the non-heat transfer wall 11. Alternatively, it may be provided on both the lower surface of the substrate 7 and the upper surface of the non-heat transfer wall 11. By providing the elastic body accommodating depressions 14 on both the lower surface of the substrate 7 and the upper surface of the non-heat transfer wall 11, the position of the turbulence promoting body 5 is defined by the respective elastic body accommodating depressions 14 and the elastic bodies 13. Therefore, the movement of the turbulent flow promoting body 5 in the fluid flow direction can be suppressed, and the movement of the turbulent flow promoting body 5 in the direction orthogonal to the fluid flow direction (the width direction of the heat exchanger 1) is also suppressed. You can also. Therefore, it is possible to more reliably define the region showing the high heat transfer characteristics to which the turbulence promoting body 5 is attached. Further, it is possible to suppress the turbulent flow promoting body 5 from deviating from a desired position and deteriorating the flow characteristics of the heat exchanger 1 (increasing pressure loss).

  Further, as shown in FIGS. 14 to 16, the heat exchanger 1 according to the fourth embodiment has an inflow portion of a bypass flow that flows through a gap generated between the turbulence promoting body 5 and the non-heat transfer portion 4 ( Since the weir 15 is provided on the upstream side of the turbulent flow promoting body 5 so that the bypass flow is unlikely to occur, the fluid that has flowed into the heat exchanger 1 flows through the flow passage 2 in contact with the heat transfer wall 3. It is possible to suppress the deterioration of heat exchange characteristics due to the bypass flow. Furthermore, the variation between the individual heat and flow characteristics of the heat exchanger 1 can be suppressed. In addition, in the heat exchanger 1 shown to FIGS. 14-16, although the weir 15 is provided in the upstream of the turbulent flow promoting body 5, it arises between the turbulent flow promoting body 5 and the non-heat-transfer part 4. FIG. As long as the bypass flow flowing through the gap can be suppressed, the weir 15 may be provided on the downstream side of the turbulence promoting body 5 or directly below the substrate 7. When a plurality of turbulence promoting bodies 5 are mounted, A weir 15 may be provided between the substrates 7 of the turbulence promoting body 5. Furthermore, the roles of the positioning protrusion 8a and the positioning recess 9a are shared, and a weir 15 is provided between the turbulent flow promoting body 5 and the non-heat transfer wall 11 to suppress the bypass flow and Positioning may be performed. In addition, in the heat exchanger 1 shown in FIGS. 14-16, although the cross section parallel to the side wall 12 of the weir 15 is made into the rectangle, a triangle or trapezoid etc. may be sufficient and the said turbulent flow promoter 5 and the non-heat-transfer part 4 Any structure may be used as long as the gap generated between the two is blocked. It is preferable to make the surface of the weir 15 into which the fluid flows in a curved surface, or make the cross section of the weir 15 triangular or trapezoidal and make the surface into which the fluid flows into an inclined surface, because the pressure loss associated with the flow is reduced.

  FIG. 17 is a cross-sectional view schematically showing another example of the heat exchanger according to Embodiment 4 of the present invention, and FIG. 17A is a cross-sectional view of the heat exchanger according to Embodiment 4 of the present invention. FIG. 17B is a cross-sectional view taken along the line AA of FIG. 17A, and FIG. 17C is a cross-sectional view taken along the line BB of FIG. 18 is a diagram showing a configuration of the turbulence promoting body of the heat exchanger shown in FIG. 17, FIG. 18 (a) is a bottom view of the turbulence promoting body, and FIG. 18 (b) is a diagram of FIG. It is sectional drawing in the CC cross section of (a). 19 is a diagram showing a configuration of a non-heat transfer portion of the heat exchanger shown in FIG. 18, FIG. 19 (a) is a top view of the non-heat transfer portion, and FIG. 19 (b) is a diagram of FIG. It is sectional drawing in the DD cross section of (a).

  In the heat exchanger 1 shown in FIGS. 17 to 19, a substrate accommodation recess 16 for accommodating the substrate 7 of the turbulence promoting body 5 is provided on the upper surface of the non-heat transfer wall 11. The upper surface of the non-heat transfer wall 11 and the upper surface of the substrate 7 are substantially at the same height. By doing in this way, the bypass flow which flows through the clearance gap between the board | substrate 7 and the non-heat-transfer wall 11 is suppressed, and the fall of a heat exchange characteristic can be suppressed. Furthermore, since there is no step in the flow path 2 due to the substrate 7, there is an effect that the pressure loss is reduced. In particular, as shown in the third embodiment, when the turbulent flow promoting body 5 is pressed against the heat transfer wall 3, the gap is easily formed. The heat exchange characteristics are remarkably high.

It is sectional drawing which shows the heat exchanger by Embodiment 1 of this invention. It is a figure which shows the structure of the turbulent flow promoting body of the heat exchanger by Embodiment 1 of this invention. It is a figure which shows the structure of the non-heat-transfer part of the heat exchanger by Embodiment 1 of this invention. It is sectional drawing which shows the heat exchanger by Embodiment 1 of this invention. It is a figure which shows the structure of the turbulent flow promoting body of the heat exchanger by Embodiment 1 of this invention. It is a figure which shows the structure of the non-heat-transfer part of the heat exchanger by Embodiment 1 of this invention. It is sectional drawing which shows the heat exchanger by Embodiment 1 of this invention. It is sectional drawing which shows the heat exchanger by Embodiment 1 of this invention. It is sectional drawing which shows the heat exchanger by Embodiment 2 of this invention. It is sectional drawing which shows the heat exchanger by Embodiment 3 of this invention. It is sectional drawing which shows the heat exchanger by Embodiment 3 of this invention. It is sectional drawing which shows the non-heat-transfer part of the heat exchanger by Embodiment 3 of this invention. It is a block diagram which shows the heat exchanger by Embodiment 3 of this invention. It is sectional drawing which shows the heat exchanger by Embodiment 4 of this invention. It is a figure which shows the structure of the turbulent flow promoting body of the heat exchanger by Embodiment 4 of this invention. It is a figure which shows the structure of the non-heat-transfer part of the heat exchanger by Embodiment 4 of this invention. It is sectional drawing which shows the heat exchanger by Embodiment 4 of this invention. It is a figure which shows the structure of the turbulent flow promoting body of the heat exchanger by Embodiment 4 of this invention. It is a figure which shows the structure of the non-heat-transfer part of the heat exchanger by Embodiment 4 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Heat exchanger, 2 flow path, 3 Heat transfer wall, 4 Non-heat transfer part, 5 Turbulence promoter, 6 Protrusion, 7 Substrate, 8a, 8b, 8c, 8d, 8e, 8f Positioning protrusion, 9a , 9b, 9c Positioning depression, 10 pressing part, 11 non-heat transfer wall, 12 side wall, 13 elastic body, 14 elastic body accommodation depression, 15 weir, 16 substrate accommodation depression.

Claims (13)

A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plurality of plates disposed between the heat transfer wall and the non-heat transfer wall, each having a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions disposed on the substrate. With turbulence promoters,
A heat exchanger that constitutes a flow path through which fluid flows between the heat transfer wall, the substrate, and the side wall,
The non-heat transfer wall has a positioning protrusion protruding on a surface facing the substrate,
The positioning protrusion is disposed between the plurality of turbulence promoting bodies or between the side wall and the turbulence promoting body. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
The non-heat transfer wall has a positioning protrusion protruding on a surface facing the substrate,
The substrate has a positioning recess which is recessed so that the positioning protrusion is accommodated on a surface facing the non-heat transfer wall;
Having a pressing means for pressing the tip of the protrusion against the lower surface of the heat transfer wall;
The pressing means is an elastic body provided between the non-heat transfer wall and the substrate,
A heat exchanger characterized in that an elastic body housing recess for mounting an elastic body is provided on at least one of a surface of the non-heat transfer wall facing the substrate or a surface of the substrate facing the non-heat transfer wall. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
The substrate has a positioning protrusion protruding on a surface facing the non-heat transfer wall,
The non-heat transfer wall has a positioning recess that is recessed so that the positioning protrusion is housed on a surface facing the substrate,
Having a pressing means for pressing the tip of the protrusion against the lower surface of the heat transfer wall;
The pressing means is an elastic body provided between the non-heat transfer wall and the substrate,
A heat exchanger characterized in that an elastic body housing recess for mounting an elastic body is provided on at least one of a surface of the non-heat transfer wall facing the substrate or a surface of the substrate facing the non-heat transfer wall . A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
The side wall has a positioning protrusion protruding on a surface facing the substrate,
The substrate has a positioning recess which is recessed so that the positioning protrusion is housed on a surface facing the side wall,
Having a pressing means for pressing the tip of the protrusion against the lower surface of the heat transfer wall;
The pressing means is an elastic body provided between the non-heat transfer wall and the substrate,
A heat exchanger characterized in that an elastic body housing recess for mounting an elastic body is provided on at least one of a surface of the non-heat transfer wall facing the substrate or a surface of the substrate facing the non-heat transfer wall . A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plurality of plates disposed between the heat transfer wall and the non-heat transfer wall, each having a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions disposed on the substrate. With turbulence promoters,
A heat exchanger that constitutes a flow path through which fluid flows between the heat transfer wall, the substrate, and the side wall,
The non-heat transfer wall has a positioning protrusion protruding on a surface facing the substrate,
The positioning protrusion is disposed between the plurality of turbulence promoting bodies or between the side wall and the turbulence promoting body,
Having a pressing means for pressing the tip of the protrusion against the lower surface of the heat transfer wall;
The pressing means is an elastic body provided between the non-heat transfer wall and the substrate,
A heat exchanger characterized in that an elastic body housing recess for mounting an elastic body is provided on at least one of a surface of the non-heat transfer wall facing the substrate or a surface of the substrate facing the non-heat transfer wall . A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
The non-heat transfer wall has a positioning protrusion protruding on a surface facing the substrate,
The substrate has a positioning recess which is recessed so that the positioning protrusion is accommodated on a surface facing the non-heat transfer wall;
The non-heat transfer wall has a weir perpendicular to the fluid flow direction on the surface facing the substrate. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
The substrate has a positioning protrusion protruding on a surface facing the non-heat transfer wall,
The non-heat transfer wall has a positioning recess that is recessed so that the positioning protrusion is housed on a surface facing the substrate,
The non-heat transfer wall has a weir perpendicular to the fluid flow direction on the surface facing the substrate. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
The side wall has a positioning protrusion protruding on a surface facing the substrate,
The substrate has a positioning recess which is recessed so that the positioning protrusion is housed on a surface facing the side wall,
The non-heat transfer wall has a weir perpendicular to the fluid flow direction on the surface facing the substrate. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plurality of plates disposed between the heat transfer wall and the non-heat transfer wall, each having a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions disposed on the substrate. With turbulence promoters,
A heat exchanger that constitutes a flow path through which fluid flows between the heat transfer wall, the substrate, and the side wall,
The non-heat transfer wall has a positioning protrusion protruding on a surface facing the substrate,
The positioning protrusion is disposed between the plurality of turbulence promoting bodies or between the side wall and the turbulence promoting body,
The non-heat transfer wall has a weir perpendicular to the fluid flow direction on the surface facing the substrate. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
In the mutually opposing surface between the substrate and the non-heat transfer wall, or the mutually opposing surface between the substrate and the side wall, there is a positioning protrusion in which one surface protrudes to the other surface. And the other surface has a positioning recess which is recessed so that the positioning projection is accommodated,
The one surface is the surface of the substrate, the non-heat transfer wall or the side wall, and the other surface is the substrate or the non-heat transfer wall,
The turbulence promoting body has a height from the lower surface of the substrate to the tip of the protrusion before the heat transfer wall and the non-heat transfer portion are joined, from the upper surface of the non-heat transfer wall to the upper surface of the side surface. After the joining of the heat transfer wall and the non-heat transfer portion, the tip of the protrusion is pressed against the lower surface of the heat transfer surface by elastic deformation or plastic deformation of the turbulent flow promoting body. A heat exchanger characterized by that. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
In the mutually opposing surfaces between the substrate and the non-heat transfer wall, or the mutually opposing surfaces between the substrate and the side wall, there is a positioning protrusion whose one surface protrudes to the other surface. And the other surface has a positioning recess which is recessed so that the positioning projection is accommodated,
The one surface is the surface of the substrate, the non-heat transfer wall or the side wall, and the other surface is the substrate or the non-heat transfer wall,
The turbulent flow promoting body has a non-height from the bottom surface of the substrate of the turbulent flow promoting body to the tip of the protrusion of the turbulent flow promoting body before joining the heat transfer wall and the non-heat transfer wall. The height from the upper surface of the heat transfer wall to the upper surface of the side wall is substantially the same, and the substrate of the turbulence promoting body is warped, and after joining the heat transfer wall and the non-heat transfer wall, The heat exchanger, wherein a tip of the protrusion of the turbulence promoting body is pressed against a lower surface of the heat transfer wall. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
In the mutually opposing surface between the substrate and the non-heat transfer wall, or the mutually opposing surface between the substrate and the side wall, there is a positioning protrusion in which one surface protrudes to the other surface. And the other surface has a positioning recess which is recessed so that the positioning projection is accommodated,
The one surface is the surface of the substrate, the non-heat transfer wall or the side wall, and the other surface is the substrate or the non-heat transfer wall,
An inclined surface, a convex curved surface or a concave curved surface is provided as a pressing portion on the substrate or the heat transfer wall, and before joining the heat transfer wall and the non-heat transfer wall, between the substrate and the heat transfer wall. After the gap is formed and the heat transfer wall and the non-heat transfer wall are joined, the tip of the protrusion is the lower surface of the heat transfer wall due to the repulsive force between the substrate or the heat transfer wall and the pressing portion. A heat exchanger that is pressed against the heat exchanger. A heat transfer wall that conducts heat from the heating element to the fluid,
A non-heat transfer wall installed opposite the heat transfer wall;
Side walls installed between the heat transfer wall and the non-heat transfer wall at both ends of the non-heat transfer wall;
And a plate-like substrate disposed on the non-heat transfer wall and a plurality of protrusions installed on the substrate, the disturbance installed between the heat transfer wall and the non-heat transfer wall. With flow promoters,
A heat exchanger that constitutes a flow path through which the fluid flows between the heat transfer wall, the substrate, and the side wall;
In the mutually opposing surfaces between the substrate and the non-heat transfer wall, or the mutually opposing surfaces between the substrate and the side wall, there is a positioning protrusion whose one surface protrudes to the other surface. And the other surface has a positioning recess which is recessed so that the positioning projection is accommodated,
The one surface is the surface of the substrate, the non-heat transfer wall or the side wall, and the other surface is the substrate or the non-heat transfer wall,
An elastic body is provided between the non-heat transfer wall and the substrate, and a tip of the protrusion is pressed against the lower surface of the heat transfer wall by the elastic force of the elastic body.

Images