JP2006287037A - Electronic instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic instrument capable of preventing the outflow of cooling water by insuring sealing property even if a connecting surface estranges. <P>SOLUTION: The electronic instrument 10 is provided with a cabinet housing 11 for mounting an electronic component 12 and a waterway cover 13 fixed to the lower surface of the cabinet housing 11 by clamping bolts 15. In this case, the cabinet housing 11 transfers the heat of the electronic component 12 mounted on the upper surface side to the side of the lower surface. Further, the water way 17 for making cooling water flow therethrough is formed between the cabinet housing 11 and the water way cover 13. A sealing agent reservoir unit 16 filled with sealing agent 14 is formed between a connecting surface for connecting the cabinet housing 11 to the waterway cover 13 and the waterway 17. According to this constitution, the sealing agent 14 filled into the sealing agent reservoir unit 16 deforms through flattery deformation even if the connecting surface estranges whereby the cooling water in the waterway 17 can be prevented from outflow out of the waterway 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device that cools an electronic component with a cooling fluid flowing in a flow path.

An electronic device that cools an electronic component with a cooling fluid that flows in a flow path includes, for example, an inverter device disclosed in Patent Document 1. This inverter device includes an inverter that is an electronic component, an inverter case on which the inverter is placed on the upper surface side, and a cover that is attached to the lower surface side of the inverter case. A cooling water channel through which cooling water flows is formed between the inverter case and the cover. Furthermore, in order to ensure the sealing performance at the joint surface between the inverter case and the cover, a seal layer such as a gasket or a liquid gasket is formed on the joint surface.
JP 2003-101277 A

  By the way, in order to ensure the cooling performance of the electronic device, the cooling water flowing through the cooling water passage is always in a state where a pressure of about several tens of kPa is applied. Therefore, a large pressing force acts on the inverter case and the cover forming the cooling water channel in a direction in which both are separated. As a result, the joint surface between the inverter case and the cover is separated, and the cooling water may flow out to the outside.

  This invention is made in view of such a situation, and provides the electronic device which can prevent the outflow of the cooling fluid by ensuring sealing performance even if a joint surface separates. With the goal.

  The electronic device of the present invention includes an electronic component, a heat transfer member, a flow path reservoir forming member, and a sealant. Here, the heat transfer member is a member that places the electronic component on the first surface side and transfers heat of the electronic component. The flow path reservoir forming member is a member disposed on the second surface side of the heat transfer member.

  Furthermore, a flow path for circulating a cooling fluid is formed between the heat transfer member and the flow path reservoir forming member. The heat transfer member is formed with a first joint surface located outside the flow channel, and the flow channel reservoir forming member is located outside the flow channel and faces the first joint surface. A second bonding surface is formed. A sealant reservoir is formed between the flow path and the first and second joint surfaces. The sealant is filled in the sealant reservoir and is interposed between the first joint surface and the second joint surface.

  Here, as described above, the pressure of the cooling fluid flowing in the flow path is, for example, about several tens of kPa. Due to the pressure of the cooling fluid, a large pressing force acts on the heat transfer member and the flow path reservoir forming member in the direction in which they are separated from each other. Here, the sealing agent filled in the sealing agent reservoir is disposed outside the flow path. This sealant has a thickness corresponding to the height of the sealant reservoir and a width corresponding to the width of the sealant reservoir. Therefore, when the heat transfer member and the flow path reservoir forming member are about to be separated from each other, the sealing agent follows the deformation of both. That is, the sealing agent is deformed so as to maintain a state where it is joined to the heat transfer member and the flow path reservoir forming member. Thereby, the flow path formed inside the sealing agent and the outside of the sealing agent can be reliably partitioned by the sealing agent. Accordingly, even when the heat transfer member and the flow path reservoir forming member are deformed and the first joint surface and the second joint surface are separated from each other, the heat transfer member and the flow path reservoir forming member are cooled by the sealant disposed inside the joint surface. The sealing property of the working fluid can be ensured.

  Further, since the sealant is filled in the sealant reservoir, the sealant has a thickness corresponding to the height of the sealant reservoir and a width corresponding to the width of the sealant reservoir. That is, the thickness and width of the sealing agent are in accordance with the shape of the sealing agent reservoir. Thus, the thickness and width of the sealant can be appropriately managed by appropriately designing the shape of the sealant reservoir. For example, the heat transfer member and the flow channel reservoir are determined depending on the specification conditions such as the pressure of the cooling fluid, the material of the heat transfer member and the flow channel reservoir forming member, and the bonding strength between the heat transfer member and the flow channel reservoir forming member. The deformation amount of the part forming member is different. Therefore, a good sealing property can be ensured by appropriately determining the thickness and width of the sealing agent according to these specification conditions.

  The sealant reservoir may be an in-groove space of a concave groove formed in at least one of the heat transfer member and the flow path reservoir forming member. That is, the sealant reservoir is a groove inner space formed only in the heat transfer member, a groove inner space formed only in the flow channel reservoir forming member, or the heat transfer member and the flow channel reservoir. It is the groove inner space of the groove formed in any of the part forming members. When the sealant reservoir is the heat transfer member only or the groove inner space of the groove formed only on the flow path reservoir forming member, the process work of the groove and the workability of applying the sealant are reduced. Can be improved.

  In addition, the said recessed groove which forms the space in a groove | channel of a sealing agent reservoir part is good to be formed by cutting. As a result, the height and width of the sealant reservoir can be matched with the design values more reliably, and stable surface roughness can be ensured. That is, the thickness and width of the sealing agent can be reliably set to the design values, and a stable adhesive force can be obtained. As a result, it is possible to reliably ensure an appropriate sealing property.

  Further, the heat transfer member includes a mounting plate for mounting the electronic component on the first surface side, and a rib integrally provided on the first surface side of the mounting plate, The sealant reservoir may be formed on the second surface side of the mounting plate and at a position facing the rib. The portion of the mounting plate where the ribs are erected has high rigidity. In other words, the portion of the mounting plate where the ribs are erected can suppress deformation. And a deformation | transformation of a sealing agent will be suppressed by forming a sealing agent reservoir part in the opposing position of a rib with few deformation | transformation. As a result, the durability of the sealing agent can be improved.

  The rib may be a wall surface surrounding the electronic component. Here, the heat transfer member may be configured to surround the electronic component, for example, for protection of the electronic component. Therefore, by using the wall surface surrounding the electronic component as the rib, the above-described effect can be achieved without forming a rib separately.

  And a plurality of fastening members disposed on the first and second joining surfaces for fastening the heat transfer member and the flow path reservoir forming member, wherein the sealant reservoir is the first fastening member. And the second fastening member adjacent to the first fastening member.

  For example, the sealant reservoir portion includes a first sealant reservoir portion formed at an intermediate position between the first fastening member and the second fastening member, the second fastening member, and the second fastening member. And a second sealant reservoir formed at a position intermediate from the third fastener adjacent to the second fastener and distant from the first sealant reservoir. Also good. In this case, the sealing agent is disposed at an intermediate position between adjacent fastening members, and is not disposed in the vicinity of the fastening member. That is, the sealing agent is intermittently disposed at an intermediate position between adjacent fastening members. In addition, the intermediate position of an adjacent fastening member means the intermediate | middle of a line perpendicular | vertical to the straight line which passes along each of the adjacent fastening members, and connects adjacent fastening members.

  Here, in the vicinity of the portion where the fastening member is disposed, the heat transfer member and the flow channel reservoir forming member are relatively difficult to separate due to the fastening force of the fastening member. On the other hand, at an intermediate position between adjacent fastening members, the heat transfer member and the flow path reservoir forming member are relatively easily separated by the pressure of the cooling fluid. Therefore, the sealing performance can be sufficiently ensured by disposing the sealing agent only at the intermediate position between the adjacent fastening members.

  In particular, the sealant reservoir may be formed on a line connecting adjacent fastening members. That is, the sealing agent is disposed on a line connecting adjacent fastening members. Thereby, since the space between the fastening member and the flow path can be reduced, when the width of the flow path is made equal, the entire electronic device can be reduced in the width direction. Alternatively, the width of the flow path can be increased when the width of the entire electronic device is equal. As a result, the cooling performance can be improved.

  Of course, it is needless to say that the sealing performance can be ensured more reliably by disposing the sealing agent also in the vicinity of the joint surface of the portion where the fastening member is disposed.

  According to the electronic device of the present invention, even if the first joint surface of the heat transfer member and the second joint surface of the flow path reservoir forming member are separated from each other, the deformation is filled in the sealant reservoir. Since the sealing agent follows, sealing performance can be ensured. As a result, it is possible to reliably prevent the cooling fluid flowing through the flow path from flowing out.

  Next, the present invention will be described in more detail with reference to embodiments.

(1) 1st Embodiment The electronic device 10 in 1st Embodiment is demonstrated with reference to FIGS. 1-3. FIG. 1 is a cross-sectional view of an electronic device 10 according to the first embodiment. 2 shows a bottom view of the plate portion 111 of the housing case 11, that is, a cross-sectional view taken along the line AA of FIG. 3 shows a top view of the water channel cover 13, that is, a cross-sectional view taken along the line BB of FIG.

  As shown in FIG. 1, the electronic device 10 according to the first embodiment includes a housing case (heat transfer member) 11, an electronic component 12, a water channel cover (flow channel reservoir forming member) 13, and a sealing agent 14. And a fastening bolt (fastening member) 15.

  The case 11 is made of a metal such as aluminum that has good heat transfer. The housing case 11 has a function of transmitting heat of the electronic component 12 to a water channel 17 (shown in FIG. 1) described later. The housing case 11 includes a plate part 111 and a lid part 112.

  The plate portion (mounting plate) 111 has a substantially rectangular shape of, for example, 300 mm × 300 mm. Of the lower surface side (second surface side) of the plate portion 111, the right end side and the left end side in FIG. 2 form a flat surface (first joint surface) (hereinafter referred to as “case end side flat surface”) 111a. Yes. The case end side flat surface 111a is a surface to be joined to a flat surface 13a (shown in FIG. 3) of the water channel cover 13 described later. In each case end side flat surface 111a, three bolt holes 111b are formed penetratingly at equal intervals.

  Further, a groove (hereinafter referred to as a “case groove”) 111c is cut on the inner side adjacent to each case end side flat surface 111a on the lower surface side of the plate portion 111 so as to extend in the vertical direction of FIG. It is formed by. That is, the case concave groove 111c and the case end side flat surface 111a are formed adjacent to each other. As shown in FIG. 1, the shape of the case concave groove 111c is such that the groove width gradually decreases as the groove depth increases. Specifically, the cross-sectional shape of the case concave groove 111c is a substantially trapezoid composed of an inclined surface, a flat surface, and an inclined surface from the case end side flat surface 111a side to the inside (fin fin 111d side described later).

  Further, a plurality of fins 111d are formed between the case concave grooves 111c on the lower surface side of the plate portion 111 so as to extend in the vertical direction of FIG. The fins 111d are covered with a flow path cover 13 described later, thereby forming a water channel 17 through which cooling water (cooling fluid) flows.

  The lid portion 112 has a substantially rectangular parallelepiped shape with the lower surface side opened. The lower surface side of the lid portion 112 is integrated with the upper surface side (first surface side) of the plate portion 111. Further, the side wall surface portion 112a of the lid portion 112 is positioned immediately above the case concave groove 111c. That is, the side wall surface portion (rib) 112a of the lid portion 112 and the case concave groove 111c are positioned to face each other.

  The electronic component 12 is placed in the space surrounded by the plate portion 111 and the lid portion 112 of the housing case 11 and on the upper surface side (first surface side) of the plate portion 111. This electronic component is, for example, a vehicle inverter or converter provided with a heat generating element.

  The water channel cover (flow channel reservoir forming member) 13 is made of a metal such as aluminum and has a substantially rectangular plate shape having substantially the same size as the plate portion 111 of the housing case 11. Of the upper surface side of the water channel cover 13, the right end side and the left end side in FIG. 3 form a flat surface (second joining surface) (hereinafter referred to as “cover end side flat surface”) 13 a. This cover end side flat surface 13a is a position facing the case end side flat surface 111a, and is formed to have the same width as the case end side flat surface 111a. Further, three bolt fastening female threads 13b are formed through each cover end side flat surface 13a at a position communicating with a bolt hole 111b formed in the plate portion 111 of the housing case 11.

  Further, a concave groove (hereinafter referred to as “cover concave groove”) 13c is cut so as to extend in the vertical direction in FIG. 3 on the inner side adjacent to each cover end side flat surface 13a on the upper surface side of the water channel cover 13. It is formed by processing. And this cover ditch | groove 13c is formed in the position facing the case ditch | groove 111c. That is, the cover concave groove 13c and the cover end side flat surface 13a are formed adjacent to each other. As shown in FIG. 1, the cross-sectional shape of the cover concave groove 13c is such that the groove width is gradually narrowed as it becomes deeper. Specifically, the shape of the cover concave groove 13c is a substantially trapezoid composed of an inclined surface, a flat surface, and an inclined surface from the cover end side flat surface 13a side to the inside. That is, the cover groove 13c has the same shape as the case groove 111c. The case concave groove 111c and the cover concave groove 13c form a sealant reservoir 16 that fills a sealant 14 described later. That is, the sealant reservoir 16 is a space in the groove of the case groove 111c and the cover groove 13c. The sealant reservoir 16 has a thickness in the range of 0.1 mm to 2.0 mm, a width in the range of 1 to 10 mm, and the like, for example.

  Further, a flat surface (hereinafter referred to as a “cover central flat surface”) 13 d located on the same plane as the cover end side flat surface 13 a is formed between the cover concave grooves 13 c on the upper surface side of the water channel cover 13. Yes. The cover center flat surface 13d is a position facing the fin 111d formed on the plate portion 111 of the housing case 11. That is, the cover center flat surface 13d closes the opening side (lower surface side) of the fin 111d. And the water channel (flow path) 17 is formed by the fin 111d of the board part 111 of the housing | casing case 11, and the cover center flat surface 13d. Note that high-pressure cooling water (cooling fluid) flows through the water channel 17.

  As the sealant 14, for example, a liquid silicon material is used. Here, FIG. 4 is referred to in order to explain the arrangement position of the sealant 14. FIG. 4 is an enlarged view of a portion C in FIG. As shown in FIG. 4, the sealing agent 14 is interposed between the case end flat surface 111a and the cover end flat surface 13a and is applied very thinly. The sealant 14 applied to this portion mainly has an action of bonding the case end side flat surface 111a and the cover end side flat surface 13a.

  Further, the sealant 14 is filled in the sealant reservoir 16. The sealant 14 filled in this portion has an action of adhering the case concave groove 111c and the cover concave groove 13c, and the cooling water in the water channel 17 does not flow outside (the left end side or the right end side in FIG. 1). High sealing performance is ensured. Details of this will be described later.

  The fastening bolt 15 is inserted into a bolt hole 111 b formed in the housing case 11 from the upper surface side and is screwed into a bolt fastening female screw 13 b formed in the water channel cover 13. Thereby, the housing | casing case 11 and the water channel cover 13 are fixed integrally. Specifically, the case-end flat surface 111a and the cover-end-side flat surface 13a are joined by the fastening bolt 15 via the sealing agent 14 applied thinly.

  A case where cooling water is circulated through the water channel 17 of the electronic apparatus 10 having the above-described configuration will be described. Here, the pressure of the cooling water circulated through the water channel 17 of the electronic device 10 is, for example, a pressure of 20 to 30 kPa. Furthermore, the air pressure in the case of supplying air in the manufacturing process to the water channel 17 and performing an air leak test or the like is, for example, 30 to 50 kPa.

  A large pressing force is generated in a direction in which the plate portion 111 of the housing case 11 and the water channel cover 13 are separated by the pressure of cooling water or air (hereinafter simply referred to as “cooling water”). In other words, the pressure of the cooling water acts to increase the height of the water channel 17 (the vertical width in FIG. 1). On the other hand, the casing case 11 and the water channel cover 13 are fastened and fixed by the fastening bolt 15 on the right end side and the left end side. Furthermore, the case end side flat surface 111a and the case concave groove 111c are bonded to the cover end side flat surface 13a and the cover concave groove 13c by the sealant 14.

  Therefore, as indicated by the white arrow in FIG. 1, a force is generated in the direction in which the inner portion of the sealant reservoir 16 opens, and the plate portion 111 and the water channel cover 13 of the housing case 11 tend to deform. At this time, the sealing agent 14 filled in the sealing agent reservoir 16 has the thickness (the vertical width in FIG. 1) and the width (the horizontal width in FIG. 1) as described above. However, it follows the deformation of the plate part 111 of the housing case 11 and the sealant reservoir part 16 of the water channel cover 13. That is, with the deformation of the plate portion 111 and the water channel cover 13 of the housing case 11, the sealing agent 14 in the sealing agent reservoir 16 is deformed.

  As a result, the state in which the plate portion 111 of the housing case 11 and the water channel cover 13 are bonded via the sealant 14 is maintained. That is, the sealing agent 14 filled in the sealing agent reservoir 16 can reliably prevent the cooling water in the water channel 17 from flowing out.

  In addition, the thickness and width of the sealing agent 14 filled in the sealing agent reservoir 16 depends on the shape of the sealing agent reservoir 16. Thus, the thickness and width of the sealant 14 can be appropriately managed by appropriately designing the shape of the sealant reservoir 16. For example, the deformation amount of the housing case 11 and the water channel cover 13 depends on the specification conditions such as the pressure of the cooling water, the material of the housing case 11 and the water channel cover 13, and the bonding strength between the housing case 11 and the water channel cover 13. Different. Therefore, good sealing performance can be ensured by appropriately determining the thickness and width of the sealing agent 14 in consideration of characteristics such as the elastic coefficient of the sealing agent 14 according to these specification conditions.

  Furthermore, since the case groove 111c and the side wall surface portion 112a of the lid portion 112 are at the opposing positions, the vicinity of the case groove 111c has high rigidity. Therefore, deformation of the plate portion 111 of the housing case 11 can be suppressed. This suppresses deformation of the sealing agent 14 filled in the sealing agent reservoir 16. Therefore, the durability of the sealing agent 14 can be improved.

(2) Second Embodiment Next, an electronic device according to a second embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a view corresponding to FIG. 2 of the electronic device 10 of the first embodiment, and shows a bottom view of the plate portion 211 of the housing case of the electronic device of the second embodiment. FIG. 6 is a view corresponding to FIG. 3 of the electronic device 10 of the first embodiment, and shows a top view of the water channel cover 23 of the electronic device of the second embodiment. In addition, about the same structure as the electronic device 10 of 1st Embodiment among the electronic devices of 2nd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. Further, only the differences between the electronic device 10 of the first embodiment and the electronic device 10 of the first embodiment will be described.

  The electronic device according to the second embodiment includes a housing case, an electronic component 12, a water channel cover 23, a sealing agent 14, and a fastening bolt 15.

  The housing case includes a plate portion 211 and a lid portion 112. The plate part 211 has a substantially rectangular shape. Of the lower surface side (second surface side) of the plate portion 211, the right end side and the left end side in FIG. 5 form a flat surface (first bonding surface) (hereinafter referred to as “case end side flat surface”) 211a. Yes. In addition, three bolt holes 111b are formed through each case end flat surface 211a at regular intervals.

  In addition, a concave groove (hereinafter referred to as a “case concave groove”) 211c is provided at two positions on the left and right sides at the intermediate position between the adjacent bolt holes 111b on the lower surface side of the plate portion 211. Each is formed by cutting. That is, as shown in FIG. 5, the outer side of the case concave groove 211c and the vertical direction side of FIG. 5 are adjacent to the case end flat surface 211a. More specifically, the case concave groove 211c is formed at an intermediate position between the uppermost bolt hole 111b in FIG. 5 and the central bolt hole 111b in the vertical direction, and the vertical central bolt hole 111b and the lowermost bolt in FIG. It is formed at an intermediate position with respect to the hole 111b. Here, the intermediate position of the adjacent bolt holes 111b means the middle of a line perpendicular to a straight line passing through each of the adjacent bolt holes 111b and connecting the adjacent bolt holes 111b. The cross-sectional shape of the case concave groove 211c is the same as the cross-sectional shape of the case concave groove 111c of the first embodiment.

  Also, a plurality of fins 111d are formed between the case concave grooves 211c on the lower surface side of the plate portion 211 so as to extend in the vertical direction of FIG.

  The water channel cover 23 has a substantially rectangular plate shape that is approximately the same size as the plate portion 211 of the housing case. The right end side and the left end side in FIG. 6 of the upper surface side of the water channel cover 23 form a flat surface (second bonding surface) (hereinafter referred to as “cover end side flat surface”) 23a. The cover end side flat surface 23a is a position facing the case end side flat surface 211a and is formed in the same shape as the case end side flat surface 211a. Furthermore, three bolt fastening female screws 13b are formed through each cover end side flat surface 23a at positions communicating with the bolt holes 111b formed in the plate portion 211 of the housing case.

  Further, a concave groove (hereinafter referred to as a “cover concave groove”) 23c is formed on the left and right sides of the upper surface side of the water channel cover 23 inside the bolt fastening female screw 13b and at an intermediate position between the adjacent bolt fastening female screws 13b. Each of the two is formed by cutting. And this cover ditch | groove 23c is formed in the position facing the case ditch | groove 211c. That is, as shown in FIG. 6, the outside of the cover concave groove 23c and the vertical direction side of FIG. 6 are adjacent to the cover end side flat surface 23a. More specifically, the cover concave groove 23c is formed at an intermediate position between the uppermost bolt fastening female screw 13b in FIG. 6 and the bolt fastening female screw 13b in the center in the vertical direction, and the bolt fastening female screw in the vertical center in FIG. 13b and an intermediate position between the lowermost bolt fastening female screw 13b. Here, the intermediate position of the adjacent bolt fastening female screw 13b means the middle of a line perpendicular to the straight line passing through the adjacent bolt fastening female screw 13b and connecting the adjacent bolt fastening female screw 13b. The cross-sectional shape of the cover groove 23c is the same as the cross-sectional shape of the cover groove 13c of the first embodiment.

  In other words, the case concave groove 211c and the cover concave groove 23c form a sealant reservoir 16 (shown in FIG. 1) that is filled with the sealant 14. That is, the sealant reservoir 16 is a space in the groove of the case concave groove 211c and the cover concave groove 23c. Accordingly, there are two sealant reservoirs 16 on the left and right sides, which are intermediate positions between adjacent fastening bolts 15 (shown in FIG. 1).

  Further, a flat surface (hereinafter referred to as a “cover central flat surface”) 13d located on the same plane as the cover end side flat surface 23a is formed between the cover grooves 23c on the upper surface side of the water channel cover 23. Yes. And this cover center flat surface 13d becomes a position facing the fin 111d formed in the board part 211 of a housing | casing case. That is, the water channel 17 is formed by the fin 111d and the cover center flat surface 13d.

  When cooling water is circulated through the water channel 17 of the electronic device having such a configuration, the portion where the sealant reservoir 16 is formed is substantially the same as that of the first embodiment. However, in the second embodiment, the sealant reservoir 16 is disposed at positions separated from each other by two on the left and right sides of the water channel 17. Therefore, there is a place where the sealant reservoir 16 does not exist next to the water channel 17. The place where the sealant reservoir 16 does not exist is in the vicinity of the fastening bolt 15 as shown in FIGS. Here, the case end side flat surface 211 a and the cover end side flat surface 23 a in the vicinity of the fastening bolt 15 are joined by the fastening force of the fastening bolt 15. Therefore, even if the plate portion 211 of the housing case and the water channel cover 23 are to be deformed by the pressure of the cooling water, the case end flat surface 211a and the cover end flat surface 23a in the vicinity of the fastening bolt 15 Are not separated. That is, the sealing performance in the vicinity of the fastening bolt 15 can be sufficiently secured. Therefore, even if there is a place where the sealant reservoir 16 does not exist next to the water channel 17, the sealing performance can be sufficiently ensured as a whole. Thereby, the application quantity of the sealing agent 14 can be restrict | limited.

(3) Third Embodiment Next, an electronic device 30 according to a third embodiment will be described with reference to FIGS. FIG. 7 is a cross-sectional view of the electronic device 30 according to the third embodiment. FIG. 8 is a bottom view of the plate portion 311 of the housing case 31, that is, a DD cross-sectional view of FIG. 7. FIG. 9 shows a top view of the water channel cover 33, that is, a cross-sectional view taken along the line EE of FIG. In addition, about the same structure as the electronic device 10 of 1st Embodiment or the electronic device of 2nd Embodiment among the electronic devices 30 of 3rd Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. Further, only the differences between the electronic device 30 of the first embodiment and the electronic device 10 of the first embodiment or the electronic device of the second embodiment will be described.

  The electronic device 30 according to the third embodiment includes a housing case 31, an electronic component 12, a water channel cover 33, a sealing agent 14, and a fastening bolt 15.

  The housing case 31 includes a plate portion 311 and a lid portion 112. The plate portion 311 has a substantially rectangular shape. Of the lower surface side (second surface side) of the plate portion 311, the right end side and the left end side in FIG. 8 form a flat surface (first joining surface) (hereinafter referred to as “case end side flat surface”) 311 a. Yes. In addition, three bolt holes 111b are formed through each case end flat surface 311a at regular intervals.

  In addition, a concave groove (hereinafter referred to as “case concave groove”) 311 c is formed by cutting at two positions on the left and right sides at an intermediate position between adjacent bolt holes 111 b on the lower surface side of the plate portion 311. Specifically, the case groove 311c is formed in a range including a line connecting adjacent bolt holes 111b. And as shown in FIG. 8, the outer side of the case ditch | groove 311c and the up-down direction side of FIG. 8 are adjacent to the case end side flat surface 311a.

  In addition, a plurality of fins 311d are formed between the case concave grooves 311c on the lower surface side of the plate portion 311 so as to extend in the vertical direction of FIG. As shown in FIG. 7, the fin 311 d is formed to a position immediately below the side wall surface portion 112 a of the lid portion 112.

  The water channel cover 33 has a substantially rectangular plate shape that is substantially the same size as the plate portion 311 of the housing case 31. Of the upper surface side of the water channel cover 33, the right end side and the left end side in FIG. 9 form a flat surface (second joining surface) (hereinafter referred to as “cover end side flat surface”) 33a. This cover end side flat surface 33a is a position facing the case end side flat surface 311a, and is formed in the same shape as the case end side flat surface 311a. Furthermore, three bolt fastening female screws 13b are formed through each cover end side flat surface 33a at a position communicating with the bolt hole 111b formed in the plate portion 311 of the housing case 31.

  Further, a concave groove (hereinafter referred to as “cover concave groove”) 33 c is formed by cutting at two positions on the left and right sides at an intermediate position of the adjacent bolt fastening female screw 13 b on the upper surface side of the water channel cover 33. Yes. And this cover ditch | groove 33c is formed in the position facing the case ditch | groove 311c. Specifically, the cover concave groove 33c is formed in a range including a line connecting adjacent bolt fastening female screws 13b. And as shown in FIG. 9, the outer side of the cover ditch | groove 33c and the up-down direction side of FIG. 9 are adjacent to the cover end side flat surface 33a.

  In other words, the case concave groove 311c and the cover concave groove 33c form a sealant reservoir 16 (shown in FIG. 7) that fills the sealant 14. That is, the sealant reservoir 16 is an in-groove space of the case groove 311c and the cover groove 33c. Accordingly, there are two sealant reservoirs 16 on the left and right sides, which are intermediate positions between adjacent fastening bolts 15 (shown in FIG. 7).

  Further, a flat surface (hereinafter referred to as “cover center flat surface”) 33d located on the same plane as the cover end side flat surface 33a is formed between the cover concave grooves 33c on the upper surface side of the water channel cover 33. The cover center flat surface 33d is a position facing the fin 311d formed on the plate portion 311 of the housing case 31. That is, the water channel 17 is formed by the fin 311d and the cover center flat surface 33d.

  When the cooling water is circulated through the water channel 17 of the electronic apparatus 30 having such a configuration, it is the same as in the second embodiment. In addition, the electronic device 30 of 3rd Embodiment has the width of the water channel 17 wider than the electronic device of 2nd Embodiment. As a result, the cooling performance can be improved.

(4) 4th Embodiment Next, the electronic device in 4th Embodiment is demonstrated with reference to FIG.10 and FIG.11. FIG. 10 is a view corresponding to FIG. 2 of the electronic device 10 of the first embodiment, and shows a bottom view of the plate portion 411 of the housing case of the electronic device of the fourth embodiment. FIG. 11 is a view corresponding to FIG. 3 of the electronic device 10 of the first embodiment, and shows a top view of the water channel cover 43 of the electronic device of the fourth embodiment. In addition, the electronic device of 4th Embodiment differs in the shape of the upper surface of the board part 411 of a housing | casing case, and the upper surface of the water channel cover 43 with respect to the electronic device 10 of 1st Embodiment mentioned above. Hereinafter, only the lower surface of the plate portion 411 of the housing case and the upper surface of the water channel cover 43 will be described.

  The lower surface side of the plate part 411 of the housing case is formed as follows. A flat surface (first joint surface) (hereinafter referred to as “case outer peripheral flat surface”) 411 a having the same width over the entire circumference is formed on the outer peripheral side of the lower surface side of the plate portion 411. Further, a total of 16 bolt holes 411b are formed through the case outer peripheral flat surface 411a at equal intervals.

  A concave groove (hereinafter referred to as a “case concave groove”) 411c having the same width on the entire circumference is formed by cutting on the inner side of the case outer peripheral flat surface 411a on the lower surface side of the plate portion 411 of the housing case. That is, the case outer peripheral flat surface 411a and the case concave groove 411c are formed adjacent to each other. And the cross-sectional shape of this case ditch | groove 411c is the same as the cross-sectional shape of the case ditch | groove 111c of 1st Embodiment.

  A plurality of fins 411d bent in a substantially wave shape so as to connect the upper left end side and the lower right end side of FIG. 10 are formed inside the case groove 411c on the lower surface side of the plate portion 411 of the housing case. . That is, the fin 411d communicates the upper left end side and the lower right end side in FIG. A flat surface (hereinafter referred to as a “fin partition flat surface”) 411e located on the same plane as the case outer peripheral flat surface 411a is formed between the portion where the fin 411d is formed and the case groove 411c. Yes. That is, the fin section flat surface 411e defines the inner position of the case groove 411c and the formation position of the fin 411d.

  The upper surface side of the water channel cover 43 is formed as follows. A flat surface (second joint surface) (hereinafter referred to as “cover outer peripheral flat surface”) 43 a having the same width over the entire circumference is formed on the outer peripheral side of the upper surface side of the water channel cover 43. The cover outer peripheral flat surface 43a is a position facing the case outer peripheral flat surface 411a, and is formed in the same shape as the case end side flat surface 411a. Further, sixteen bolt fastening female screws 43b are formed through the cover outer peripheral flat surface 43a at positions communicating with the bolt holes 411b formed in the plate portion 411 of the housing case.

  Further, a concave groove (hereinafter referred to as “cover concave groove”) 43 c having the same width on the entire circumference is formed by cutting on the inner side of the cover outer peripheral flat surface 43 a on the upper surface side of the water channel cover 43. And this cover ditch | groove 43c is formed in the position facing the case ditch | groove 411c. That is, the cover outer peripheral flat surface 43a and the cover concave groove 43c are formed so as to be adjacent to each other. And the cross-sectional shape of this cover ditch | groove 43c is the same as that of the cover ditch | groove 13c of 1st Embodiment. As described above, the case concave groove 411c and the cover concave groove 43c form a sealing agent reservoir for filling the sealing agent. The sealing agent reservoir is filled with the sealing agent.

  On the inner side of the cover groove 43c on the upper surface side of the water channel cover 43, a water channel groove 43d having the same width and bent in a substantially wave shape is formed so as to connect the upper right end side and the left lower end side of FIG. That is, the water channel groove 43d communicates the upper right end side and the left lower end side of FIG. The water channel groove 43d is formed at a position facing the fin 411d. Thus, a water channel (not shown) is formed by the fin 411d and the water channel groove 43d. In addition, a flat surface (hereinafter referred to as a “water channel groove flat surface”) 43e located on the same plane as the cover outer peripheral flat surface 43a is formed between the water channel groove 43d and the cover groove 43c. . That is, the water channel groove flat surface 43e partitions the inner position of the cover groove 43c and forms a water channel groove 43d.

  Furthermore, water supply holes 43f and drain holes 43g are formed through both ends of the water channel groove 43d, that is, the upper right end side and the left lower end side in FIG. 11 of the water channel groove 43d, respectively. That is, the cooling water is sucked from the water supply hole 43f, passes through the water channel, and is discharged from the drain hole 43g.

  A fastening bolt (not shown) is inserted from the bolt hole 411 b of the plate portion 411 of the housing case and screwed into a bolt fastening female screw 43 b formed in the water channel cover 43. Thereby, the housing case and the water channel cover 43 are fixed integrally.

(5) Others In addition, in the said embodiment, although the ditch | groove which forms the sealant pool part 16 was formed in the board part 111 and the water channel cover 13 of the housing | casing case 11, the board part 111 of the housing | casing case 11 and a water channel Either one of the covers 13 may be used. Further, an electronic component such as a converter or an inverter may be placed on the lower surface side of the water channel cover 13. Further, in the above embodiment, the fins are formed integrally with the heat conducting member in the flow path through which the refrigerant flows, but the fins may not be formed, or separate fins are formed in the flow path. It may be.

1 is a cross-sectional view of an electronic device 10 according to a first embodiment. The bottom view of the board part 111 of the housing | casing case 11 of 1st Embodiment, ie, AA sectional drawing of FIG. 1, is shown. The top view of the waterway cover 13 of 1st Embodiment, ie, BB sectional drawing of FIG. 1, is shown. It is an enlarged view of the C section of FIG. The bottom view of the board part 211 of the housing | casing case of 2nd Embodiment is shown. The top view of the waterway cover 23 of 2nd Embodiment is shown. Sectional drawing of the electronic device 30 in 3rd Embodiment is shown. The bottom view of the board part 311 of the housing | casing case 31 (ie, DD sectional drawing of FIG. 7) is shown. The top view of the waterway cover 33, ie, EE sectional drawing of FIG. 7, is shown. The bottom view of the board part 411 of the housing | casing case in 4th Embodiment is shown. The top view of the waterway cover 43 in 4th Embodiment is shown.

Explanation of symbols

10, 30: Electronic equipment 11, 31: Housing case (heat transfer member), 12: Electronic component, 13, 23, 33, 43: Water channel cover (flow channel reservoir forming member), 14: Sealing agent, 15 : Fastening bolt (fastening member), 16: sealant reservoir, 17: water channel (channel), 111, 211, 311, 411: plate, 112: lid, 111a, 211a, 311a: flat surface on the case end side 111c, 211c, 311c, 411c: groove in the case, 111d, 311d, 411d: fin, 13a, 23a, 33a: flat surface on the cover end side, 13c, 23c, 33c, 43c: groove in the cover, 411a: flat on the outer periphery of the case 411e: fin section flat surface, 43a: cover outer peripheral flat surface, 43d: water channel ditch, 43e: water ditch groove flat surface, 43f: feed Water hole, 43g: Drain hole

Claims (8)

Electronic components,
A heat transfer member that places the electronic component on the first surface side and transfers heat of the electronic component;
A flow path reservoir forming member disposed on the second surface side of the heat transfer member;
A sealing agent;
With
Between the heat transfer member and the flow path reservoir forming member, a flow path for circulating a cooling fluid is formed,
The heat transfer member is formed with a first joint surface located outside the flow path,
The flow path reservoir forming member is formed with a second bonding surface that is located outside the flow path and faces the first bonding surface,
A sealant reservoir is formed between the flow path and the first and second joint surfaces,
The sealant is filled in the sealant reservoir and is interposed between the first joint surface and the second joint surface.   2. The electronic device according to claim 1, wherein the sealant reservoir is a groove inner space formed in at least one of the heat transfer member and the flow channel reservoir forming member.   The electronic device according to claim 2, wherein the concave groove is formed by cutting. The heat transfer member includes a mounting plate on which the electronic component is mounted on the first surface side, and a rib integrally provided on the first surface side of the mounting plate.
The electronic device according to any one of claims 1 to 3, wherein the sealant reservoir is formed on the second surface side of the mounting plate and at a position facing the rib.   The electronic device according to claim 4, wherein the rib is a wall surface surrounding the electronic component. A plurality of fastening members disposed on the first and second joining surfaces for fastening the heat transfer member and the flow path reservoir forming member;
The said sealant reservoir part is formed in the intermediate position of the said 2nd fastening member adjacent to the said 1st said fastening member and the said 1st fastening member, It is any one of Claims 1-5. Electronic equipment. The sealant reservoir is
A first sealant reservoir portion formed at an intermediate position between the first fastening member and the second fastening member;
A second seal formed at an intermediate position between the second fastening member and the third fastening member adjacent to the second fastening member and away from the first sealant reservoir. The agent reservoir,
The electronic device according to claim 6.   The electronic device according to claim 6, wherein the sealant reservoir is formed on a line connecting the adjacent fastening members.

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