JP5746001B2 - Cooler housing and method of manufacturing cooler housing - Google Patents

Description

  The present invention relates to a cooler casing that cools a heating element by forming a flow path by combining structures and a method for manufacturing the cooler casing.

  It is a cooler housing that is composed of two structures, a die body and a flow channel cover, and accommodates and cools electronic components, and a groove that forms a flow channel is formed on the lower surface of the housing main body. There is a conventional cooler housing in which a plate-like flow path cover is screwed to the lower surface (see, for example, Patent Document 1).

JP 2003-234589 A

However, the prior art has the following problems.
The cooler casing in Patent Document 1 is provided with a plate-like thin flow path cover on the outside of the housing body. For this reason, the flow path cover is not protected from collision of other objects, and when the flow path cover is damaged, the fluid in the flow path is likely to leak to the outside of the cooler housing.

  Moreover, in the prior art described in this patent document 1, it does not consider attaching the electronic component etc. which are heat-emitting components to the surface of a flow-path cover. In addition, a portion covering the groove portion of the flow path cover is protruded to the housing body side, and the flow path cover is convexly formed on the housing body side at each screwed portion of the housing body and the flow path cover. For this reason, many unevenness | corrugations exist in the surface on the opposite side to the housing main body of a flow path cover, and even if it installs a heat-emitting component, the installation place of a heat-emitting component is restrict | limited.

  Moreover, in the prior art described in this patent document 1, in the screwing of a housing main body and a flow path cover, the head uses a plate-shaped screw to suppress protrusion to the housing main body side, and the flow path cover The size in the thickness direction is suppressed. However, in order to use a fastening member with a large head size, such as a bolt with a strong fastening force and a columnar head, it is necessary to increase the size of the flow path cover in the thickness direction only for that purpose, and space efficiency is increased. bad.

  Furthermore, in the thickness part which provides the groove part of a housing main body, since parts other than a groove part are made into a metal part, weight reduction of a cooler housing | casing is difficult.

  On the other hand, a groove constituting the flow path is formed in the casing body closed with a lid, a flow path cover is formed in the casing main body, and a heat generating component is attached on the flow path cover, so that the flow path cover can be It is possible to protect against the collision of other objects and to suppress fluid leakage to the outside of the cooler. However, the housing body is enlarged to accommodate the flow path cover, and the position where the heat generating component is attached is restricted by the position of the fastening member between the flow path cover and the housing body.

  Further, if the head of the fastening member (fastening component) is to be accommodated at a position where the convex portion of the flow path cover is provided as in Patent Document 1, if the head of the fastening member is large, the flow path cover Therefore, the size of the flow path cover increases in the thickness direction, and the size of the casing body increases.

  The present invention has been made in order to solve the above-described problems, and includes a cooler housing and a cooler housing that can reduce the size of the housing body with less restrictions on the installation positions of the heat generating components. It aims to provide a method.

The cooler casing according to the present invention has a recess, and an inlet and an outlet of a flow path for cooling the heating element are installed on the side wall, and the bottom surface of the recess has a height and is one of the walls of the flow path. A housing main body provided with a first flow path wall to be a part, a lid that forms a space part by closing an opening of a concave part of the housing body, and is housed in the space part and is high on the back side. the second flow path wall is set vignetting that is part of a a channel of the wall of the surface side opposite to the and the opening on the opposite side, the electronic component is a heating element attached to the back side A cooler housing including a flow path cover having a flat surface portion, the flow path cover having a plurality of recesses on a surface side into which a head portion of a fastening member for fastening the housing body and the flow path cover is inserted. fastening member such that the through hole is provided in a position that does not overlap with the flow channel, the enclosure body and the channel cover is in close contact with opposite More is fastened, the housing body first channel wall and the second flow path cover channel wall and the first by mating of the flow channel wall height and a second flow path wall height A flow path having a sum height is formed.

Further, in the method for manufacturing a cooler casing according to the present invention, an inlet and an outlet of a flow path for cooling the heating element are installed on the side wall on the bottom surface portion of the casing body having a space portion by the recess, A step of forming a first flow path wall having a height at the bottom surface portion and forming a part of the wall of the flow path; and a flow path having a flat surface portion that is housed in the space portion and on which the heating element is mounted A step of forming a second flow path wall having a height and a part of the wall of the flow path on the back surface side of the cover; and a plurality of members for fastening the housing body and the flow path cover with a fastening member The through hole is formed in the flow path cover so as not to overlap with the flow path, and the step of providing recesses into which the heads of the fastening members are inserted in the plurality of through holes, according to the positions of the plurality of through holes, Forming a fastening hole for fastening with a fastening member in a bottom surface portion of the housing body; Is fastened by a fastening member so that the housing body and the channel cover is in close contact with opposite, first by a first flow path wall and the flow path the second flow path wall of the cover of the housing body mate Forming a flow path having the sum of the height of the first flow path wall and the height of the second flow path wall , mounting a heating element on the surface of the flow path cover, Fastening and fixing, mounting a heating element on the surface of the flow path cover, and attaching a lid for closing the opening of the recess of the housing body.

  According to the cooler casing and the manufacturing method of the cooler casing according to the present invention, the space constituted by the casing main body, the lid, and the flow path cover is effectively utilized, and the back surface of the flow path cover and the casing main body are The flow path wall provided on the bottom surface is used to fasten the flow path cover and the casing body to form a cooling flow path, and the flow path cover surrounded by the casing main body and the lid The front side is configured as a space with no protrusions, and it is possible to mount heat generating parts, so there are few restrictions on the installation position of the heat generating parts, and the cooler housing and cooling that can downsize the chassis body A method for manufacturing a container housing can be obtained.

It is a perspective view which shows the cooler housing | casing which concerns on Embodiment 1 of this invention. In FIG. 1A, it is sectional drawing in the cross section II in the state which attached the cover and the flow-path cover. It is sectional drawing which expanded only the screw part in the cross section II-II of FIG. 1A. 1 is a perspective view of a cooler casing according to Embodiment 1 of the present invention, in which a flow path cover and a fastening member for fixing a flow path cover are removed, and a part of the wall surface of the casing main body is cut along a III-III cross section of FIG. FIG. In the cooler casing according to Embodiment 1 of the present invention, a part of the wall surface of the casing body when the casing body and the flow path cover are fixed using a fastening member is taken along the line II-II in FIG. 1A. FIG. It is a side view of the cooler housing | casing seen from the direction V of FIG. 3 which concerns on Embodiment 1 of this invention. It is sectional drawing which extracted the part which concerns on flow-path height in the cross section cut in the IV-IV cross section of FIG. 1A of the cooler housing | casing which concerns on Embodiment 1 of this invention. It is sectional drawing which extracted the part which concerns on flow-path height in the cross section cut in the IV-IV cross section of FIG. 1A of the cooler housing | casing which concerns on Embodiment 1 of this invention. It is sectional drawing which extracted the part which concerns on flow-path height in the cross section cut in the IV-IV cross section of FIG. 1A of the cooler housing | casing which concerns on Embodiment 1 of this invention. It is sectional drawing which extracted the part which concerns on flow-path height in the cross section cut in the IV-IV cross section of FIG. 1A of the cooler housing | casing which concerns on Embodiment 1 of this invention. It is sectional drawing which extracted the part which concerns on flow-path height in the cross section cut in the IV-IV cross section of FIG. 1A of the cooler housing | casing which concerns on Embodiment 1 of this invention. It is another sectional drawing which extracted the part which concerns on the flow-path height of the cooler housing | casing which concerns on Embodiment 1 of this invention. It is sectional drawing cut | disconnected by the IV-IV cross section of FIG. 1A which concerns on Embodiment 2 of this invention.

  Hereinafter, preferred embodiments of a cooler casing and a method of manufacturing the cooler casing of the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
FIG. 1A is a perspective view showing a cooler casing according to Embodiment 1 of the present invention. Specifically, FIG. 1A is a perspective view showing a state where a lid 14 and a flow path cover 3 are removed. Moreover, FIG. 1B is sectional drawing in the cross section II in the state which attached the cover 14 and the flow-path cover 3 in FIG. 1A. Furthermore, FIG. 1C is an enlarged cross-sectional view of only the threaded portion in the cross-section II-II in FIG. 1A.

  In the first embodiment, as shown in FIG. 1B, the case main body 2 has two concave portions on the upper and lower sides. However, the number of the concave portions may be one. A space portion 16 is formed in the housing body 2 by attaching the lids 14 one by one on both sides by the lid fixing fastening members 15. And in this space part 16, the electronic component 19 and the wiring board 20 are attached.

  2 shows the cooler casing according to Embodiment 1 of the present invention, in which the flow path cover and the fastening member for fixing the flow path cover are removed, and a part of the wall surface of the casing main body is taken along the line III-- of FIG. It is the perspective view cut in the III section. As shown in FIG. 2, the flow path for cooling the heating elements such as the electronic component 19 and the wiring board 20 is composed of a single flow path from the inlet to the outlet without branching or joining in the middle. .

  In this way, it is not necessary to consider the flow rate distribution (which may be called “distribution”) by using one flow path without branching. In addition, the flow path cover 3 is not simply a plate shape, and the flow path wall 8 is integrally formed with the flow path cover 3, so that the strength against bending and twisting of the flow path cover 3 can be increased. It is possible to prevent the flow path cover 3 from being deformed.

  The cooler casing 1 includes a casing body 2, a flow path cover 3, and a fastening member 4. The flow path 10 in the cooler casing 1 includes a flow path wall 7 (corresponding to a first flow path wall) on the side of the casing main body 2 that is molded in the casing main body 2 and the back side of the flow path cover 3. The channel wall 8 (corresponding to the second channel wall) on the side of the channel cover 3 molded into the shape is fastened by the fastening member 4. On the other hand, as shown in FIG. 1B, an electronic component 19 corresponding to a heating element, a wiring board 20, and the like are attached to the surface side of the flow path cover 3.

  FIG. 3 shows a part of the wall surface of the casing body when the casing body 2 and the flow path cover 3 are fixed using the fastening member 4 in the cooler casing according to Embodiment 1 of the present invention. It is the perspective view cut in the II-II section of Drawing 1A.

  As is clear from FIGS. 1C, 2, and 3, the flow path cover 3 has a concave portion on the surface side into which the head of the fastening member 4 that fastens the housing body 2 and the flow path cover 3 is inserted. A plurality of through holes 12 are provided at positions that do not overlap with the flow path 10. Here, as shown in FIG. 1C, the height of the head of the fastening member 4 is P1, and the depth of the recess provided on the flow path cover 3 side in order to insert the head of the fastening member 4 is Assuming T1, there is a relationship of T1> P1.

  As a result, the surface side of the flow path cover 3 can maintain a flat portion without the fastening member 4 protruding even after the fastening member 4 is inserted, and the electronic component 19 and the wiring board 20 can be passed through the plurality of through holes. It can be arranged at any position on the surface side, including the position covering the top of the hole 12.

  Even if the head of the fastening member 4 does not protrude from the surface of the flow path cover 3, the position of the electronic component or the like is not limited by the position of the through hole 12 from the viewpoint of the cooling effect. Therefore, in consideration of the cooling effect, it is possible to provide a plurality of through holes 12 more on the side wall 6 side of the housing body than on the center side of the flow path cover 3 in relation to the flow path 10 to be formed. . In this way, the number of through holes 12 is increased on the side surface side of the housing, and as much as possible from the center so that there are no through holes, an electronic component or the like is arranged on the flow path in consideration of the cooling effect. Can do.

  FIG. 4 is a side view of the cooler casing as viewed from the direction V in FIG. 3 according to Embodiment 1 of the present invention. As shown in FIG. 4, the flow path wall 8 on the flow path cover 3 side is formed with a height H1 (<H3) with respect to the flow path cover 3 having the height H3. On the other hand, the flow path wall 7 on the housing body 2 side is formed with a height H2. Further, the height H1 of the flow path wall 8 on the flow path cover 3 side is formed to be higher than the height P1 (<H3) of the head of the fastening member 4.

  That is, there is a magnitude relationship of P1 <H1 <H3. Moreover, after determining the height of H1 so that (H1 + H2) corresponding to the height of the entire flow path becomes a desired value, the height of H2 can be determined. That is, if the height H1 of the flow path wall 8 on the flow path cover 3 side is higher than the height P1 of the head of the fastening member 4 so that the fastening member 4 does not protrude from the surface of the flow path cover 3, respectively. There is no limit to the height of the.

  Each of FIG. 5A to FIG. 5E is a cross-sectional view of the cooler casing according to Embodiment 1 of the present invention, in which a section related to the channel height is extracted from the cross section cut along the IV-IV cross section of FIG. 1A. is there. As shown in FIGS. 5A to 5E, the height H1 of the flow path wall 8 on the flow path cover 3 side and the height H2 of the flow path wall 7 on the housing body 2 side are H1 = H2 (FIG. 5A). 5D and FIG. 5E), H1> H2 (corresponding to FIG. 5B), and H1 <H2 (corresponding to FIG. 5C). Further, the upper surface of the flow path provided in the flow path cover may be higher than the bottom of the recess into which the head of the fastening member is inserted (corresponding to FIG. 5E) or may be lower (corresponding to FIG. 5D). ).

  As described above, the portion of the flow path cover 3 that forms a part of the flow path 10 is added to the portion where the thickness of the flow path cover necessary for providing the concave portion for inserting the head of the fastening member 4 in the flow path cover 3 is increased. By forming the flow path wall 8, the height of the flow path required on the housing body 2 side is reduced, and an increase in the housing body size due to embedding the head of the fastening member in the flow path cover is suppressed. Can do.

  That is, by embedding the head of the fastening member 4 in the flow path cover 3 so that the head of the fastening member 4 does not protrude from the surface of the flow path cover 3, only the height P1 of the head of the fastening member 4 flows. The thickness of the road cover 3 will increase. However, in the present invention, only the height P1 of the head of the fastening member 4 (P1 or more) is provided on the housing body 2 side by providing a part of the flow channel on the flow channel cover 3 side. It becomes possible to reduce the height of the road by P1 (P1 or more). As a result, it is possible to suppress an increase in size of the housing body 2 due to the fastening member 4 being embedded in the flow path cover 3.

  Furthermore, since the head of the fastening member 4 is embedded in the flow path cover 3, there is an advantage that there are few restrictions on the mounting position of the electronic component 19 or the like.

  In addition, when the flow paths are branched in parallel to cool a plurality of portions or the whole of the lower part of the flow path cover 3, the flow paths may be designed so that the flow rate is distributed without uneven distribution of some of the flow paths. difficult. On the other hand, by cooling the wide area by meandering the flow path of one path as in the present invention, it is possible to cool the wide area while facilitating the flow path design without using such a branch as much as possible. it can.

  However, when the flow path is meandered, the number of places that need to be fastened for close contact between the flow path cover 3 and the housing body 2 is increased, and a place that needs to be fastened is also formed near the center of the flow path cover 3. . On the other hand, in the present invention, since the head of the fastening member 4 does not protrude from the flow path cover 3, even when the fastening member 4 is fastened near the center of the flow path cover 3, the electronic component 19, the wiring board 20, or Restrictions on the arrangement and storage of mechanical parts, wiring cables, etc. can be reduced.

  FIG. 6 is another cross-sectional view of the cooler casing according to Embodiment 1 of the present invention, in which a portion related to the flow path height is extracted. As shown in FIG. 6, the entire upper surface of the flow path cover does not need to be flat, and a step is provided on a part of the upper surface of the flow path cover, and a recess for inserting the head of the fastening member is provided at the step portion. May be.

  Further, the flow path wall in the first embodiment is not a groove dug in the housing body 2 and the flow path cover 3 to form only the flow path, and the flow path 10 through which the fluid flows and the fluid does not flow. It is formed to partition the cavity 17 (see FIG. 2 above).

  In this case, as shown in FIG. 2, the flow path wall 7 on the side of the housing body 2 is provided with a flow path wall thick portion 18 in which the wall thickness is partially increased. Further, the thick portion 18 is provided with a screw hole 11 (corresponding to a fastening hole).

  According to such a configuration, by installing the screw hole 11 in the flow path wall, the housing body 2 and the flow path cover 3 can be fixed with good adhesion (sealing property), and water leakage can be prevented. . Moreover, the cavity part 17 contributes to weight reduction while preventing a nest from entering when the metal housing is solidified at the time of formation.

  Further, as shown in FIG. 2, such a thick portion 18 is provided in the vicinity of the bent portion of the flow path 10, and the through hole 12 and the screw hole 11 are arranged, whereby the housing body 2 and the flow path cover are arranged. 3 can be fastened using the fastening member 4 at a place where the fastening effect is high. Specifically, as shown in FIG. 2, the vicinity of the bent portion of the flow path 10 is a U-shaped sandwiched between meandering flow paths at the corner of the bent flow path or before and after the bent portion. A part etc. are mentioned.

  As described above, according to the first embodiment, there is one flow path from the inlet to the outlet, and there is no need to consider flow distribution separately. Furthermore, by forming a flow path wall on the cover side and making it like a rib, the strength can be increased even if the cover is thinned. Furthermore, since there are no protrusions on the surface of the flow path cover, the layout and attachment of electronic components and boards can be facilitated.

  Further, a flow path wall is also provided on the flow path cover side, and the height thereof is molded higher than the head height of the fastening member for fixing the flow path cover, so that a screw hole for providing the fastening member or The thick part of the pilot hole can be used as a channel wall.

  Furthermore, since there is no protrusion on the surface of the flow path cover, the flow path cover and the housing main body can be fastened not only with a countersunk screw but also with a bolt. Furthermore, dust can be prevented by placing a heating element such as an electronic component in the sealed space.

  Furthermore, the flow path wall is not a groove, but is provided as a partition between the flow path through which the fluid flows and the hollow portion through which the fluid does not flow. As a result, by providing a screw hole in the part where the thickness of the flow path wall is partially increased, it is possible to improve the airtightness of the flow path and prevent liquid leakage, and by providing a hollow part, The area where the nest enters can be reduced and the weight can be reduced.

  Note that the entire upper surface of the flow path cover does not have to be a flat surface, and a step may be provided on a part of the upper surface of the flow path cover, and a recess for inserting the head of the fastening member may be provided at the step portion. In addition, since a plurality of through holes are provided at positions that do not overlap with the flow path, the upper surface of the flow path provided in the flow path cover may be higher than the bottom of the recess into which the head of the fastening member is inserted. Good.

  Moreover, the height of the flow path may change in the flow path direction. Further, the width of the flow path may change in the flow path direction. Further, the lid is not completely plate-shaped and may have an opening in a part thereof, and the opening may be a mesh.

  In addition, instead of providing the flow path wall as a partition that separates the flow path through which the fluid flows and the cavity through which the fluid does not flow, a groove is provided only in the flow path section through which the fluid flows, and the cavity is eliminated. Is also possible.

Embodiment 2. FIG.
In the second embodiment, the arrangement of the header 5 (corresponding to the header portion) and the nipple 13 provided at each of the inlet and outlet of the flow path 10 will be described.

  FIG. 7 is a cross-sectional view taken along the line IV-IV in FIG. 1A according to Embodiment 2 of the present invention. Specifically, FIG. 7A is a diagram for explaining the arrangement of the header 5 serving as the entrance / exit of the flow path 10, and FIG. 7A shows that the header 5 is fastened to the housing body 2 and the flow path cover 3. FIG. 7B shows a case where the header 5 is installed so as not to be related to the mating surface 9.

  As illustrated in FIG. 7B, when the header 5 is installed so as not to be related to the mating surface 9, the flow path 10 changes in the height direction. A nipple 13 is inserted into the header 5.

  According to such a configuration, when the header 5 is formed as shown in FIG. 7A, water may leak at the contact portion between the mating surface 9 and the nipple 13. On the other hand, when the header 5 is formed as shown in FIG. 7B, a portion where the mating surface 9 and the nipple 13 are in contact with each other can be eliminated, and the possibility of water leakage can be greatly reduced.

  As described above, according to the second embodiment, the header portion provided at each of the inlet and the outlet of the flow path is formed from the mating surface on which the casing main body and the flow path cover are fastened and fixed. It is offset in any one of the road covers and is provided in the height direction that does not overlap with the mating surface. As a result, a portion where the mating surface and the nipple come into contact with each other can be eliminated, and the possibility of water leakage can be greatly reduced.

  As mentioned above, although the form of this invention was demonstrated, this invention can take a various form. The shape of the flow path, the arrangement of the electronic components, and the arrangement of the wiring board are shown as examples, and are not limited to this shape and arrangement.

  Furthermore, if the housing body 2 or the flow path cover 3 is provided with fins on the flow path 10 side, the cooling efficiency of the electronic components 19 and the like attached to the housing main body 2 side or the flow path cover 3 side is improved.

  Further, the overall height (H1 + H2) of the flow path may be changed in the middle of the flow path. Further, the flow path entrance (including the header 5) may be installed on any surface as long as it is located on the side wall 6 of the housing body 2.

  There is no limitation on the method of inserting the nipple, and for example, a method of shrink fitting or inserting a sealing material such as an O-ring into the nipple and inserting it can be employed.

  Further, each of the flow path wall 7 on the housing body side and the flow path wall 8 on the flow path cover side is die-casted, so that it can be produced in large quantities in a short time as a casting with high dimensional accuracy. It becomes. However, the formation of these flow path walls is not limited to die casting, and the effects of the present invention can be obtained even if other forming methods are used.

  DESCRIPTION OF SYMBOLS 1 Cooler housing | casing, 2 Housing | casing main body, 3 Flow path cover, 4 Fastening member, 5 Header (header part), 6 Side wall of a housing | casing main body, 7 Flow path wall on the housing body side (1st flow path wall ), 8 Channel wall on the channel cover side (second channel wall), 9 mating surface, 10 channels, 11 screw hole (fastening hole), 12 through hole, 13 nipple, 14 lid, 15 for lid fixing Fastening member, 16 space part, 17 cavity part, 18 thick part, 19 electronic component, 20 wiring board.

Claims (10)

A first flow path having a recess, a flow path inlet and outlet for cooling the heating element on the side wall, and having a height at a bottom surface portion of the recess and being a part of the wall of the flow path A housing body provided with a wall ;
A lid that forms a space by closing the opening of the recess of the housing body;
While being housed in the space portion, a second flow path wall has a height a part of a wall of the channel is set vignetting on the back side, wherein the back surface side is a side opposite said opening And a flow path cover having a flat surface portion to which the electronic component as the heating element is attached on the surface side facing the heat generator,
The flow path cover is provided with a plurality of through holes having recesses on the surface side into which the heads of fastening members that fasten the housing body and the flow path cover are inserted, at positions that do not overlap the flow path. And
The casing body and the channel cover are fastened by the fastening member so as to face each other and closely contact each other, and the first channel wall of the casing body and the second channel of the channel cover The cooler housing having the height of the sum of the height of the first flow path wall and the height of the second flow path wall formed by combining with the wall . The cooler housing according to claim 1,
Each of the first flow path wall provided in the housing main body and the second flow path wall provided in the flow path cover is 1 without the flow path branching and joining from the inlet to the outlet. A cooler casing formed so as to be constituted by a path. The cooler casing according to claim 2,
Each of the first flow path wall provided in the housing body and the second flow path wall provided in the flow path cover is a path in which the flow path constituted by the one path is meandering. Formed to be formed,
The through hole provided in the flow path cover is provided at a position that does not overlap with the flow path formed as the meandering path,
The electronic component is disposed at an arbitrary position on the surface side including a position covering the upper portion of the through hole. In the cooler housing according to any one of claims 1 to 3,
The cooler housing, wherein a height of the second flow path wall provided in the flow path cover is formed to be higher than a height of a head portion of the fastening member. In the cooler housing according to any one of claims 1 to 4,
Each of the first flow path wall provided in the housing body and the second flow path wall provided in the flow path cover includes a flow path portion through which a cooling fluid flows, and the fluid flows. A cooler casing, wherein the cooler casing is formed as a wall that separates a hollow portion that is not present, and the portion provided with the plurality of through holes is formed as a thick portion. In the cooler housing according to any one of claims 1 to 5,
The header portion provided at each of the inlet and the outlet of the flow path is offset from the mating surface where the housing body and the flow path cover are fastened and fixed to either the housing body or the flow path cover. The cooler casing is provided in a height direction that does not overlap with the mating surface. In the cooler housing according to any one of claims 1 to 6,
The cooler casing, wherein the plurality of through holes are provided more on the side wall side of the casing body than on the center side of the flow path cover. In the cooler housing according to any one of claims 1 to 7,
The cooler casing, wherein the plurality of through holes provided in the flow path cover are provided at positions that do not overlap with the flow path and in the vicinity of a bent portion of the flow path. In the cooler housing according to any one of claims 1 to 8,
Each of the said 1st flow path wall provided in the said housing body and the said 2nd flow path wall provided in the said flow path cover is die-cast-formed. The cooler housing | casing characterized by the above-mentioned. An inlet and an outlet of a flow path for cooling the heating element are installed on the side wall of the bottom surface portion of the housing main body having a space portion by the recess, and the wall of the flow path has a height at the bottom surface portion of the recess. Forming a first flow path wall that becomes a part of
A second flow path wall that is housed in the space and has a height on the back surface side of the flow path cover that has a flat surface for mounting the heating element on the surface, and is a part of the wall of the flow path Forming a step;
A plurality of through holes for fastening the housing body and the flow path cover with a fastening member are formed in the flow path cover so as not to overlap with the previous flow path, and the head of the fastening member is Providing recesses to be inserted in the plurality of through holes;
In accordance with the positions of the plurality of through holes, forming a fastening hole for fastening by the fastening member on the bottom surface portion of the housing body;
The casing body and the channel cover are fastened by the fastening member so as to face each other and closely contact each other, and the first channel wall of the casing body and the second channel of the channel cover Forming the flow path having a height that is the sum of the height of the first flow path wall and the height of the second flow path wall by combining with a wall; and
Mounting the heating element on the surface of the flow path cover;
A step of fastening and fixing the flow path cover, mounting a heating element on the surface of the flow path cover, and attaching a lid for closing the opening of the recess of the housing body. Manufacturing method of cooler housing.

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