WO2023100480A1 - 電子制御装置 - Google Patents
電子制御装置 Download PDFInfo
- Publication number
- WO2023100480A1 WO2023100480A1 PCT/JP2022/037975 JP2022037975W WO2023100480A1 WO 2023100480 A1 WO2023100480 A1 WO 2023100480A1 JP 2022037975 W JP2022037975 W JP 2022037975W WO 2023100480 A1 WO2023100480 A1 WO 2023100480A1
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- WO
- WIPO (PCT)
- Prior art keywords
- heat
- fan
- area
- electronic control
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20845—Modifications to facilitate cooling, ventilating, or heating for automotive electronic casings
- H05K7/20863—Forced ventilation, e.g. on heat dissipaters coupled to components
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W40/00—Arrangements for thermal protection or thermal control
- H10W40/40—Arrangements for thermal protection or thermal control involving heat exchange by flowing fluids
- H10W40/43—Arrangements for thermal protection or thermal control involving heat exchange by flowing fluids by flowing gases, e.g. forced air cooling
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20154—Heat dissipaters coupled to components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20845—Modifications to facilitate cooling, ventilating, or heating for automotive electronic casings
- H05K7/20854—Heat transfer by conduction from internal heat source to heat radiating structure
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
- H05K7/20445—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff
- H05K7/20454—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing the coupling element being an additional piece, e.g. thermal standoff with a conformable or flexible structure compensating for irregularities, e.g. cushion bags, thermal paste
Definitions
- the present invention relates to an electronic control device.
- Vehicles such as automobiles are equipped with an electronic control unit (ECU) for engine control, motor control, etc.
- ECU electronice control unit
- Such a vehicle electronic control unit usually includes a circuit board on which heat-generating components are mounted.
- a heat-generating component is an electronic component that generates a large amount of heat, such as an electronic circuit.
- the circuit board In the electronic control device described above, the circuit board must be housed inside the housing in order to protect the heat-generating components and the circuit board. For this reason, it is important to efficiently release the heat generated by the heat-generating components to the outside of the housing.
- Patent Document 1 as a cooling structure for heat-generating components, a cooling fan that blows air toward the metal plate of the housing is provided inside the housing, and the heat-generating components mounted on the circuit board and the metal plate of the housing are separated. Structures connected by thermal conductors are described. In the technique described in Patent Document 1, even if the heat-generating components are arranged in a location that is difficult to cool with the original cooling fan, a housing separate from the original cooling fan is installed so that the heat-generating components can be cooled efficiently and reliably. A cooling fan is added inside the body.
- a cooling fan is placed inside the housing so as to face the metal plate of the housing, and the air from the cooling fan blows so as to hit the metal plate.
- the airflow sent out from the cooling fan collides with the metal plate and is forcibly bent, which may reduce the performance of the fan and prevent the heat-generating parts from being efficiently cooled.
- the additional cooling fan is arranged inside the housing separately from the cooling fan of the main body attached to the air intake hole of the housing. As a result, foreign matter such as dust enters the housing through the air intake holes of the housing, and is lifted up by the cooling fan and adheres to the surface of the circuit board and heat-generating components, adversely affecting the operation of the electronic control unit. There is fear.
- the present application includes a plurality of means for solving the above problems.
- One of them is a housing provided with a plurality of bosses including a first boss and a second boss on the inner surface; a circuit board accommodated in the internal space of the circuit board, a first heat-generating component mounted on the circuit board and thermally connected to the housing via the first boss, mounted on the circuit board, and a second A second heat-generating component thermally connected to the housing via the boss, a plurality of heat-dissipating fins formed on the outer surface of the housing, and mounted on the outer surface of the housing to blow air toward the heat-dissipating fins.
- a fan wherein the inner surface of the housing is provided with a first protrusion projecting toward the circuit board, and the housing includes a region directly above the mounting position of the first heat-generating component. is the first area, the area directly above the mounting position of the second heat-generating component is the second area, and the area between the first area and the fan in the blowing direction of the fan is the third area,
- One end side of the first protrusion is arranged to be connected to the second boss, and the other end side of the first protrusion transports heat generated by the second heat-generating component to the third area. , extending toward the third region.
- FIG. 1 is a perspective view showing the appearance of an electronic control unit according to a first embodiment
- FIG. FIG. 2 is a top view of the electronic control unit shown in FIG. 1
- FIG. 3 is a cross-sectional view of the electronic control unit shown in FIG. 2 taken along the line II
- FIG. 3 is a cross-sectional view of the electronic control device shown in FIG. 2 taken along the line II-II
- 2 is a bottom view of an upper housing included in the electronic control device shown in FIG. 1
- FIG. FIG. 3 is a diagram showing a state in which the electronic control device according to the second embodiment is sectioned along line II of FIG. 2
- FIG. 3 is a diagram showing a state in which the electronic control unit according to the second embodiment is sectioned along line II-II in FIG.
- FIG. 10 is a diagram showing a first arrangement example of heat transfer members in the second embodiment
- FIG. 11 is a diagram showing a second arrangement example of heat transfer members in the second embodiment
- It is a top view of the electronic control unit which concerns on 3rd Embodiment.
- FIG. 11 is a bottom view of an upper housing included in the electronic control device shown in FIG. 10; It is a top view of the electronic control unit which concerns on 4th Embodiment. It is a top view of the electronic control unit which concerns on 5th Embodiment.
- FIG. 14 is a cross-sectional view of the electronic control unit shown in FIG. 13 taken along line IV-IV;
- FIG. 14 is a cross-sectional view of the electronic control unit shown in FIG.
- FIG. 13 taken along the line VV; 14 is a bottom view of an upper housing included in the electronic control device shown in FIG. 13; FIG. It is a top view of the electronic control unit which concerns on 6th Embodiment. It is a top view of the electronic control unit which concerns on 7th Embodiment.
- FIG. 19 is a cross-sectional view of the electronic control device shown in FIG. 18 taken along line III-III;
- FIG. 1 is a perspective view showing the appearance of the electronic control device according to the first embodiment
- FIG. 2 is a top view of the electronic control device shown in FIG. 3 is a sectional view taken along line II of the electronic control device shown in FIG. 2
- FIG. 4 is a sectional view taken along line II-II of the electronic control device shown in FIG.
- the electronic control unit 100 includes a housing 1, a circuit board 3, a first heat-generating component 4a, a second heat-generating component 4b, a plurality of heat radiation fins 8, and a fan. 10 and.
- the housing 1 is formed in a rectangular shape in a plan view.
- the housing 1 is composed of an upper housing 1a and a lower housing 1b.
- the upper housing 1a and the lower housing 1b are fixed by, for example, fastening members such as screws (not shown).
- the upper housing 1 a and the lower housing 1 b are assembled so as to form a predetermined space inside the housing 1 .
- FIG. 5 is a bottom view of an upper housing included in the electronic control device shown in FIG. 1.
- the lower surface of the upper housing 1a is provided with a first boss 6a, a second boss 6b, and a first protrusion 7a.
- a lower surface of the upper housing 1 a corresponds to an inner surface of the housing 1 .
- the first boss 6a, the second boss 6b, and the first projection 7a are all provided to protrude from the lower surface of the upper housing 1a toward the circuit board 3 side.
- the upper housing 1a is preferably made of a metal material with excellent thermal conductivity, such as aluminum or an aluminum alloy.
- the upper housing 1a is, for example, a casting obtained by aluminum die casting.
- the upper housing 1a is not limited to aluminum or the like, and can be made of sheet metal such as iron for cost reduction, or can be made of a nonmetallic material such as a resin material to reduce weight. You can also plan.
- the lower housing 1b can be made of a sheet metal such as iron, or a non-metallic material such as a resin material, in addition to aluminum or the like.
- One or more connectors 9 and Ethernet (registered trademark) terminals are arranged on one side of the housing 1 .
- the connector 9 is a connector for electrical connection with an external device (not shown), that is, a connector for external connection.
- the housing 1 is formed with an insertion portion 12 through which the connector 9 is inserted.
- the insertion portion 12 is formed by a hole, a notch, or the like through which the connector 9 can be inserted.
- a stepped portion 14 for forming the insertion portion 12 is formed integrally with the upper housing 1 a of the housing 1 .
- the stepped portion 14 is formed to protrude from the upper surface of the upper housing 1a.
- the connector 9 is connected to a wiring pattern (not shown) formed on the circuit board 3 . Between the electronic control unit 100 and an external device (not shown), power is supplied or various signals are transmitted/received via the connector 9 or an Ethernet terminal.
- the circuit board 3 is accommodated in the internal space of the housing 1.
- the internal space of the housing 1 is a space surrounded by the upper housing 1a and the lower housing 1b.
- a corner portion of the upper housing 1a is provided with a boss 2 (FIGS. 3 and 4) projecting toward the circuit board 3 side.
- the boss 2 is formed integrally with the upper housing 1a.
- the circuit board 3 is fixed to the boss 2 of the housing 1 with screws (not shown).
- the circuit board 3 is composed of, for example, a glass epoxy board made of an organic material such as epoxy resin.
- the circuit board 3 is preferably made of FR4 (Flame Retardant Type 4) material, but may be made of a metal core board or the like having a metallic material as a base material.
- the circuit board 3 can be a single layer board or a multilayer board.
- a plurality of heat-generating components including semiconductor elements such as microcomputers are mounted on the circuit board 3 .
- a plurality of heat-generating components are mounted on the upper surface of the circuit board 3 and electrically and mechanically connected to the circuit board 3 with a bonding material such as solder.
- the first heat-generating component 4a and the second heat-generating component 4b are given as examples of the plurality of heat-generating components mounted on the circuit board 3, but the number of heat-generating components mounted on the circuit board 3 is It may be three or more.
- Passive elements such as capacitors (not shown) are also mounted on the circuit board 3 .
- the circuit board 3 is formed with a wiring pattern (not shown) for electrically connecting the heat-generating component 4 and the like to the connector 9 and the like.
- the first heat-generating component 4a is composed of a semiconductor package in which a semiconductor element (semiconductor chip) such as a microcomputer or CPU (central processing unit) is sealed with resin.
- a BGA Bit Grid Array
- a main heat radiation path of the first heat-generating component 4a is a path via the upper surface of the first heat-generating component 4a.
- the first heat-generating component 4a has a heat spreader or the like for facilitating heat dissipation of the semiconductor element, which is a heat-generating body. Therefore, the heat radiation amount of the first heat-generating component 4a is greater in the upward heat radiation path by the heat spreader or the like than in the heat radiation path to the circuit board 3 via the solder balls.
- a first heat transfer material 5a and a first boss 6a are provided on the first heat generating component 4a.
- the first heat transfer material 5a various kinds of materials such as grease-like, gel-like, and sheet-like materials can be used.
- a commonly used heat transfer material is a grease-like heat transfer material, more specifically, a thermosetting resin having adhesive properties, a semi-hardening resin having low elasticity, or the like.
- the first heat transfer material 5a contains a filler having good thermal conductivity, which is made of metal, carbon, ceramic, or the like.
- the first heat transfer material 5a is preferably made of a material having flexibility so that it can be deformed against heat-induced deformation and vibration of the circuit board 3 and against manufacturing tolerances.
- the first heat transfer member 5a from a semi-cured resin using a silicon-based resin containing a ceramic filler.
- the first heat transfer material 5a thermally connects the first heat generating component 4a and the first boss 6a by being laminated with a predetermined thickness on the heat spreader described above.
- the first boss 6a is formed in a square shape to match the outer shape of the first heat generating component 4a.
- the first boss 6a has a convex shape on the lower surface of the upper housing 1a in order to fill the gap between the first heat-generating component 4a and the upper housing 1a in the thickness direction (height direction) of the housing 1.
- the heat generated by the first heat generating component 4a is transferred to the upper housing 1a of the housing 1 via the first heat transfer material 5a and the first boss 6a. Further, the heat of the first heat-generating component 4a transferred to the upper housing 1a is released to the outside of the housing 1 by convective heat transfer caused by blowing air from the fan 10 between the heat radiating fins 8.
- the second heat-generating component 4b like the first heat-generating component 4a, is composed of a semiconductor package in which semiconductor elements such as a microcomputer and a CPU are encapsulated with resin. BGA is preferable as the package structure of the first heat-generating component 4a.
- the second heat-generating component 4b has a heat spreader and the like, like the first heat-generating component 4a. Therefore, the main heat radiation path of the second heat-generating component 4b is the path through the upper surface of the second heat-generating component 4b.
- a second heat transfer material 5b and a second boss 6b are provided on the second heat generating component 4b.
- the second heat transfer material 5b thermally connects the second heat generating component 4b and the second boss 6b.
- the details of the second heat transfer material 5b are the same as those of the first heat transfer material 5a described above, so description thereof is omitted.
- the second boss 6b is formed in a square shape to match the outer shape of the second heat generating component 4b.
- the second boss 6b is provided in a convex shape on the lower surface of the upper housing 1a in order to fill the gap between the second heat generating component 4b and the upper housing 1a in the thickness direction of the housing 1. . Thereby, the heat generated by the second heat generating component 4b is transferred to the upper housing 1a of the housing 1 via the second heat transfer material 5b and the second boss 6b.
- At least one of the first heat-generating component 4a and the second heat-generating component 4b has a semiconductor element such as a Gigabit Ethernet IC (integrated circuit), a memory IC, or a power supply IC. good too.
- the package structure of at least one of the first heat-generating component 4a and the second heat-generating component 4b may be, for example, QFP (Quad Flat Package) or QFN (Quad Flat Non-leaded package). That is, the package structure of the first heat-generating component 4a and the second heat-generating component 4b is not limited to a specific structure.
- the first convex portion 7a is formed as a convex-shaped protrusion on the lower surface of the upper housing 1a.
- the first convex portion 7a linearly extends long in a direction intersecting with the plurality of heat radiation fins 8 (horizontal direction in FIG. 2).
- one end side of the first protrusion 7a is arranged to connect with the second boss 6b as shown in FIG.
- one end side of the first protrusion 7a is arranged at a position continuous with the second boss 6b.
- the other end side of the first projection 7a extends toward the area between the fan 10 and the first heat generating component 4a.
- the first convex portion 7a is formed integrally with the upper housing 1a by casting such as die casting.
- the first convex portion 7a is produced as a member different from the upper housing 1a, for example, a heat pipe, a vapor chamber, or a member made of a metal material with high thermal conductivity such as Cu or Al, and this member is used as the upper housing 1a. may be attached to the
- a plurality of heat radiation fins 8 are formed on the upper surface of the upper housing 1a.
- the upper surface of the upper housing 1 a corresponds to the outer surface of the housing 1 .
- the radiation fins 8 are formed integrally with the upper housing 1a when the upper housing 1a is formed by casting. However, the radiation fins 8 may be manufactured as a separate member from the upper housing 1a and attached to the upper housing 1a. This point also applies to the first boss 6a and the second boss 6b.
- the fan 10 is a fan for air cooling and blows air in the F direction in FIG.
- the fan 10 is mounted on the upper surface of the upper housing 1a. Therefore, there is no possibility that foreign matter such as dust is blown up by the fan 10 inside the housing 1 .
- the first convex portion 7a described above is arranged on the side opposite to the fan 10 in the thickness direction of the upper housing 1a. Therefore, no matter what shape or arrangement the first protrusions 7a have, the presence of the first protrusions 7a does not hinder the blowing of air from the fan 10.
- the fan 10 is arranged close to one side of the housing 1 where the connector 9 is arranged. Specifically, the fan 10 is arranged at a position adjacent to the stepped portion 14 .
- the fan 10 is arranged near the connector 9 .
- the connector 9 and the fan 10 can be easily wired, and the length of the wiring can be shortened.
- the plurality of heat radiation fins 8 formed on the upper surface of the upper housing 1a some of the heat radiation fins 8 are formed shorter than the other heat radiation fins 8 so as not to interfere with the mounting position of the fan 10.
- FIG. 10 a plurality of radiating fins 8 are arranged in the blowing direction F of the fan 10 . These radiation fins 8 are arranged along the blowing direction F of the fan 10 . Therefore, the air sent out from the fan 10 flows between the radiating fins 8 .
- the fan 10 can be regarded as a refrigerant circulation device for circulating the air that is the refrigerant.
- Fan 10 is preferably a centrifugal fan or a blower fan.
- the fan 10, which may be a centrifugal fan or a blower fan, is configured to bend the drawn air by 90 degrees inside the fan and exhaust it. Therefore, mounting the fan 10 in close contact with the upper surface of the upper housing 1a can contribute to reducing the height of the electronic control unit 100.
- the fan 10 is not limited to a centrifugal fan or a blower fan, and may be an axial fan, for example. In that case, the axial fan should be mounted with an appropriate gap between it and the upper surface of the upper housing 1a so that air can be sent out from the axial fan to the space between the radiating fins 8.
- the upper housing 1a is divided into a plurality of areas and defined.
- the upper housing 1a has a first area A, a second area B, and a third area C, as shown in FIGS. These regions are divided by the first heat-generating component 4a, the second heat-generating component 4b, the mounting position of the fan 10, and the blowing direction.
- the first area A is an area directly above the mounting position of the first heat-generating component 4a.
- the heat radiating fins 8 present in the first area A are cooled by the air sent out from the fan 10 . That is, the first area A is configured to radiate heat by forced air cooling.
- a second region B is a region directly above the mounting position of the second heat-generating component 4b.
- the radiating fins 8 present in the second region B are configured to radiate heat mainly by natural air cooling.
- a third area C is an area between the first area A and the fan 10 in the blowing direction F of the fan 10 (FIG. 1).
- the first area A is located in the blowing direction F of the fan 10 . Therefore, the first region A has a higher heat radiation effect than the second region B. As shown in FIG.
- the amount of heat generated by the first heat generating component 4a is preferably larger than the amount of heat generated by the second heat generating component 4b.
- first protrusions 7a The arrangement of the first protrusions 7a described above can be described in terms of areas as follows. First, one end side of the first convex portion 7a is arranged at a position adjacent to the second region B. As shown in FIG. Further, the other end side of the first convex portion 7a extends toward the third region C. As shown in FIG. That is, the first convex portion 7a extends from the second region B toward the third region C. As shown in FIG. Thereby, the heat generated by the second heat-generating component 4b is transported to the third region C through the first protrusion 7a. Therefore, the heat of the second heat-generating component 4b transported to the third area C through the first projection 7a is transferred by convective heat transfer using the air sent from the fan 10 toward the third area C. It is possible to actively dissipate heat.
- the third area C is located between the fan 10 and the first area A, that is, upstream of the first area A in the blowing direction F of the fan 10 . Therefore, the air sent out from the fan 10 is supplied to the third area C in a cold state before being warmed by taking heat from the first heat-generating component 4a, that is, as cold air. Therefore, a temperature gradient is increased between the second area B located directly above the second heat-generating component 4b and the third area C which receives the airflow (cold air) from the fan 10. Heat transfer in the one convex portion 7a is promoted. Therefore, the heat of the second heat-generating component 4b can be efficiently released to the outside of the housing 1.
- the air sent out from the fan 10 is supplied to the first region A located directly above the first heat generating component 4a. Therefore, the heat of the first heat-generating component 4 a can be efficiently released to the outside of the housing 1 .
- the other end side of the first convex portion 7a crosses the third region C
- the other end of the first convex portion 7a may be arranged in the third region C, or may be arranged in front of the third region C. good too. That is, the first convex portion 7a only needs to extend toward the third region C so as to transport the heat generated by the second heat generating component 4b to the third region C.
- the first convex portion 7a does not exist in the third region C, and the circuit board is directly below the third region C.
- An empty area is secured on 3. Therefore, on the circuit board 3, electronic components (for example, tall components) necessary for operating the first heat-generating component 4a are arranged near the first heat-generating component 4a using the above-mentioned empty area. can be placed in
- the first convex portion 7a is formed in a straight line, but the present invention is not limited to this. It may be formed by bending the Also, the projection dimension of the first convex portion 7a relative to the lower surface of the upper housing 1a may be partially increased or decreased.
- a plurality of radiation fins 8 are formed on the upper surface of the upper housing 1a as described above.
- Each of the radiation fins 8 is arranged at regular intervals in a direction perpendicular to the blowing direction F of the fan 10 .
- the heat radiating fins 8 form a linear flow path capable of blowing air from the fan 10 toward the first area A.
- each heat radiation fin 8 is formed in parallel with the blowing direction F of the fan 10 .
- the air sent out from the fan 10 smoothly flows along the radiation fins 8 so as to pass through the third area C and the first area A in this order. Therefore, the first heat-generating component 4a can be cooled without lowering the fan performance.
- a forced air-cooled area D is defined as a forced air-cooled area by blowing air from the fan 10
- a natural air-cooled area E is defined as an area surrounding the mounting position of the second heat generating component 4b and naturally air-cooled.
- the forced air cooling area D becomes an area including the first area A and the third area C
- the natural air cooling area E becomes an area including the second area B.
- the interval between the radiation fins 8 in the forced air-cooling region D is preferably the same as the interval between the radiation fins 8 in the natural air-cooling region E or narrower.
- the reason is as follows. First, narrowing the space between the heat radiating fins 8 in the forced air-cooling region D ensures a large heat radiation area by the heat radiating fins 8, so that the amount of heat radiated in the forced air-cooling region D can be increased. On the other hand, narrowing the interval between the heat radiating fins 8 in the natural air cooling region E makes it difficult for the air due to natural convection to enter the deep side of the heat radiating fins 8 (the side close to the upper surface of the upper housing 1a).
- the interval between the heat radiating fins 8 in the forced air-cooling region D should be equal to or longer than the interval between the heat radiating fins 8 in the natural air-cooling region E. should also be narrowed.
- the first convex portion 7a is provided on the lower surface of the upper housing 1a.
- One end of the first protrusion 7a is connected to the second boss 6b, and the other end of the first protrusion 7a dissipates the heat generated by the second heat-generating component 4b. It extends from the second region B towards the third region C so as to transport to the region C of the .
- both the first heat-generating component 4a arranged in the blowing region (forced air cooling region D) of the fan 10 and the second heat-generating component 4b arranged at a position away from the blowing region of the fan 10 are controlled by the fan. Efficient cooling can be achieved without degrading performance.
- the second heat-generating component 4b arranged at a position away from the blowing area of the fan 10 can be efficiently cooled, the degree of freedom in arranging the second heat-generating component 4b on the circuit board 3 is increased. be able to.
- the first heat-generating component 4a and the first boss 6a are connected by the first heat transfer material 5a
- the second heat-generating component 4b and the second boss 6b are connected by the second They are connected by a heat transfer material 5b.
- the heat generated by the first heat generating component 4a can be efficiently transferred to the upper housing 1a via the first heat transfer material 5a and the first boss 6a
- the heat generated by the second heat generating component 4b can be efficiently transferred to the upper housing 1a via the second heat transfer material 5b and the second boss 6b.
- FIG. 6 is a diagram showing a state in which the electronic control device according to the second embodiment is sectioned along line II in FIG. 2, and FIG. It is a figure which shows the state which cross-sectioned in the -II line position.
- the electronic control unit 100 according to the second embodiment has the circuit board 3 and the first convex portion 100 compared with the configuration of the first embodiment (FIGS. 3 and 4). It differs in that a heat transfer member 11 is provided between it and the portion 7a.
- the heat transfer member 11 is a member that thermally connects the first convex portion 7 a and the circuit board 3 .
- a metal portion that is not covered with a resist or the like is exposed on the upper surface of the circuit board 3, and the heat transfer member 11 is in contact with this metal portion.
- the heat transfer member 11 may be composed of a grease-like thermally conductive material similar to the heat transfer material 5 described above, or may be composed of a gasket or the like in which a conductive nonwoven fabric is wrapped around a sponge material. .
- the heat transfer member 11 preferably has flexibility (elasticity) in addition to thermal conductivity. Since the heat transfer member 11 has flexibility, the heat transfer member 11 can be brought into close contact with both the first convex portion 7 a and the circuit board 3 . In addition, deformation and vibration of the circuit board 3 due to heat and manufacturing tolerances can be absorbed by the deformation of the heat transfer member 11 .
- the heat transfer member 11 may be linearly formed continuously along the longitudinal direction of the first convex portion 7a as shown in FIG. They may be formed in dots at intervals in the longitudinal direction of the portion 7a. In the configuration in which the heat transfer member 11 is formed in a linear shape, a large contact area of the heat transfer member 11 with respect to the circuit board 3 and the first convex portion 7a can be ensured. Therefore, the heat of the circuit board 3 can be efficiently transferred to the first convex portion 7a. In the configuration in which the heat transfer member 11 is formed in a point shape, even when the heat transfer member 11 needs to be divided into small parts due to the mounting density of the circuit board 3, it can be flexibly handled.
- the width of the heat transfer member 11 is preferably the same as the width of the first protrusion 7a in order to ensure a large contact area. However, the width of the heat transfer member 11 may be narrower than the width of the first protrusion 7a.
- the width of the heat transfer member 11 refers to the dimension of the heat transfer member 11 in the lateral direction of the first protrusions 7a, and the width of the first protrusions 7a refers to the lateral direction of the first protrusions 7a. refers to the dimensions of
- the interval between the heat transfer members 11 in the longitudinal direction of the first convex portion 7a may be constant, or may vary depending on the location.
- the size of each heat transfer member 11 arranged in the longitudinal direction of the first convex portion 7a may be a constant size, or may be different depending on the location.
- heat-generating components other than the first heat-generating component 4a and the second heat-generating component 4b are provided by providing the heat transfer member 11 between the first convex portion 7a and the circuit board 3. (not shown) and the heat on the circuit board 3 is easily conducted through the heat transfer member 11 to the first convex portion 7a. Therefore, the heat dissipation of the electronic control unit 100 can be improved. In addition, deformation and vibration of the circuit board 3 due to heat and manufacturing tolerances can be absorbed by the deformation of the heat transfer member 11 . Therefore, it is possible to provide the electronic control unit 100 with high reliability.
- FIG. 11 is a bottom view of an upper housing included in the electronic control device shown in FIG.
- the electronic control unit 100 according to the third embodiment has a shape of the first convex portion 7a compared with the configuration of the first embodiment (FIGS. 2 and 5). is different.
- one end side (left side in FIG. 11) of the first protrusion 7a is arranged in a state of being connected to two sides of the second boss 6b.
- first convex portion 7a is formed so that the width gradually narrows from the second region B toward the third region C so as not to interfere with the first boss 6a. Further, the other end side of the first convex portion 7a extends from the second region B toward the third region C as in the first embodiment described above. Further, the other end side of the first convex portion 7a is arranged to cross the third region C. As shown in FIG.
- the second The heat of the heat generating component 4b can be efficiently transferred from the second boss 6b to the first protrusion 7a.
- one end side of the first convex portion 7a is formed to be wide, the area of the first convex portion 7a is increased as compared with the configuration of the first embodiment. Therefore, the thermal resistance when transferring the heat of the second heat-generating component 4b to the third region C is reduced. Therefore, the heat of the second heat-generating component 4b can be easily transported to the third region C through the first projections 7a. Therefore, the heat dissipation of the electronic control unit 100 can be improved.
- one end side of the first convex portion 7a is arranged so as to be connected to two sides of the second boss 6b.
- the sides may be arranged to connect to three or four sides of the second boss 6b.
- the shape of the first protrusion 7a is such that one end of the first protrusion 7a connects to two or more sides of the second boss 6b, and the other end of the first protrusion 7a connects to the first boss. Any shape may be used as long as it does not interfere with 6a. Further, in order to improve the heat radiation performance of the electronic control unit 100, it is preferable that the size of the first convex portion 7a is as large as possible.
- FIG. 12 is a top view of the electronic control device according to the fourth embodiment. As shown in FIG. 12, the electronic control unit 100 according to the fourth embodiment differs in the orientation of the plurality of radiation fins 8 from the configuration of the first embodiment (FIG. 2). A detailed description will be given below.
- the radiating fins 8a arranged on the side of the first area A extend along the blowing direction of the fan 10 as in the first embodiment. placed in the direction.
- the radiation fins 8b arranged on the second area B side are arranged at a different angle from the radiation fins 8a arranged on the first area A side.
- the radiation fins 8b arranged in the vicinity of the second area B are arranged at an angle different from that of the radiation fins 8a toward the forced air cooling area D, which is the blowing area of the fan 10.
- the heat radiation fins 8b arranged in the natural air cooling region E including the heat radiation fins 8b arranged near the second region B, are arranged in a direction perpendicular to the blowing direction F (FIG. 1) of the fan 10. ing.
- the heat radiating fins 8a arranged on the side of the first area A are arranged vertically
- the heat radiating fins 8b arranged on the side of the second area B are arranged horizontally.
- the radiation fins 8b arranged near the second region B are arranged at an angle different from that of the radiation fins 8a toward the forced air cooling region D including the third region C.
- the distribution of heat transferred from the second heat-generating component 4b to the upper housing 1a spreads toward the forced air-cooling region D along the radiation fins 8b. Therefore, the heat of the second heat-generating component 4b can be efficiently transported to the forced air cooling area D.
- all the heat radiating fins 8b arranged in the natural air cooling region E including the heat radiating fins 8b arranged near the second region B and the heat radiating fins 8b arranged at positions adjacent to the forced air cooling region D, are removed. As shown in FIG. 12, by uniformly arranging them horizontally, the heat dissipation of the heat-generating components (including the second heat-generating component 4b) mounted in the natural air cooling area E can be improved.
- all the radiating fins 8b arranged in the natural air-cooling region E are arranged sideways. It may be arranged horizontally, or only the radiation fins 8b arranged adjacent to the forced air-cooling area D may be arranged horizontally. Further, the direction of the heat radiation fins 8b is not limited to the direction orthogonal to the blowing direction F of the fan 10, and it is sufficient that the heat radiation fins 8b are formed toward the forced air cooling region D.
- FIG. 13 is a top view of the electronic control device according to the fifth embodiment.
- 14 is a sectional view taken along line IV-IV of the electronic control device shown in FIG. 13
- FIG. 15 is a sectional view taken along line VV of the electronic control device shown in FIG. 16 is a bottom view of an upper housing included in the electronic control device shown in FIG. 13.
- FIG. 13 to 16 the electronic control unit 100 according to the fifth embodiment has a second convex portion on the housing 1 compared to the configuration of the first embodiment (FIGS. 1 to 5) described above. It differs in that a portion 7b is provided.
- the second convex portion 7b is provided on the lower surface of the upper housing 1a.
- the second convex portion 7b is provided in a state of protruding toward the circuit board 3 from the lower surface of the upper housing 1a. That is, the second convex portion 7b is formed as a convex-shaped protrusion on the lower surface of the upper housing 1a. As shown in FIG. 16, the second projection 7b is formed in a shape bent at right angles, that is, in an L shape.
- One end side of the second convex portion 7b is arranged in a state of being connected to the second boss 6b.
- the second protrusion 7b is arranged at a position continuous with the second boss 6b.
- One end of the first protrusion 7a is connected to one side of the second boss 6b, and the other side of the second boss 6b located on the opposite side is connected to one end of the second protrusion 7b. is connected. That is, part of the first protrusion 7a and part of the second protrusion 7b are arranged so as to be continuous via the second boss 6b.
- the heat transferred from the second heat-generating component 4b to the second boss 6b can be released to both the first convex portion 7a and the second convex portion 7b.
- the other end side of the second convex portion 7b extends to the downstream side of the first region A in the blowing direction of the fan 10 (Fig. 1). As a result, the air blown from the fan 10 can directly cool the other end side of the second convex portion 7b. Further, the other end of the second projection 7b is located farther from the fan 10 than the third region C and the first region A are. Further, as shown in FIG. 13, the distance L1 between the point of closest approach to the fan 10 and the fan 10 on the second convex portion 7b is is longer than the distance L2 of .
- the other end side of the first convex portion 7a can be cooled preferentially over the other end side of the second convex portion 7b.
- the first protrusion 7a and the first boss 6a are arranged with a first gap G1
- the second protrusion 7b and the first boss 6a are arranged with a first gap therebetween. It is arranged with a second gap G2 from the one boss 6a.
- the heat of the second heat-generating component 4b transported to the forced air cooling area through the first convex portion 7a and the second convex portion 7b and the heat of the first heat generating component 4b mounted in the first area A within the forced air cooling area can suppress interference with the heat of the heat-generating component 4a.
- the number of heat radiation paths for releasing the heat of the second heat generating component 4b is increased. Furthermore, the other end side of the second convex portion 7b is cooled by the air blown by the fan 10. As shown in FIG. Therefore, a temperature gradient is increased between one end of the second projection 7b located near the second region B and the other end of the second projection 7b located in the forced air cooling region. promotes heat transfer in the second convex portion 7b. Therefore, the heat of the second heat generating component 4b can be efficiently transported to the forced air cooling area side.
- the second protrusion 7b is integrally formed with the upper housing 1a by die casting or the like in the same manner as the first protrusion 7a, the second protrusion 7b is not limited to this.
- a member separate from the upper housing 1a such as a heat pipe, a vapor chamber, or a member made of a metal material with high thermal conductivity such as Cu or Al, may be fabricated and attached to the upper housing 1a.
- FIG. 17 is a top view of the electronic control device according to the sixth embodiment.
- the electronic control unit 100 according to the sixth embodiment has a plurality of heat radiation fins formed on the top surface of the upper housing 1a, unlike the configuration of the fifth embodiment (FIG. 13).
- the direction of the radiation fins 8 arranged in the blowing direction of the fan 10 is different. Specifically, among the plurality of heat radiation fins 8 arranged in the blowing direction of the fan 10, a predetermined heat radiation fin 8c expands the blowing area (forced air cooling area D) of the fan 10 to the second area B side. , is inclined with respect to the blowing direction of the fan 10. As shown in FIG.
- the interval between the heat radiation fins 8c adjacent in the direction orthogonal to the blowing direction of the fan 10 gradually increases as the distance from the fan 10 increases. Focusing on the individual radiating fins 8c, one end of the radiating fins 8c is arranged in the third region C, and the other end of the radiating fins 8c is more naturally air-cooled than the one end of the radiating fins 8c due to the inclination of the radiating fins 8c themselves. It is arranged on the area side (right side in FIG. 17).
- the inclination of the heat radiation fins 8c arranged in the blowing direction of the fan 10 expands the blowing area of the fan 10 toward the second area B, so that the housing 1 can cover a wider range. can be forced air cooled.
- the heat-generating component (the second heat-generating component 4b) mounted in the natural air cooling region ) can be efficiently transported to the forced air cooling region D.
- the radiation fins 8c are formed obliquely at an angle from the third area C located near the air outlet of the fan 10. As shown in FIG.
- the heat of the second heat-generating component 4b transported to the forced air-cooling region D through the second convex portion 7b and the heat of the first heat-generating component 4a mounted in the first region A within the forced air-cooling region D can suppress interference with
- FIG. 18 is a top view of the electronic control device according to the seventh embodiment
- FIG. 19 is a cross-sectional view of the electronic control device shown in FIG. 18 taken along line III-III.
- the electronic control unit 100 according to the seventh embodiment has an upper housing 1a of the housing 1, as compared with the configuration of the first embodiment (FIGS. 2 and 4). is provided with a third protrusion 7c.
- the third convex portion 7c is provided on the upper surface of the upper housing 1a together with the radiation fins 8.
- the third protrusion 7c protrudes to the side opposite to the first protrusion 7a in the thickness direction of the upper housing 1a.
- the projection dimension of the third convex portion 7c with respect to the upper surface of the upper housing 1a is set to be the same as the projection dimension of the radiation fins 8.
- the third convex portion 7c extends from the vicinity of the second area B to the front of the third area C.
- one end of the third protrusion 7c (the right end in FIG. 18) is arranged at substantially the same position as one end of the first protrusion 7a.
- the other end of the third convex portion 7c is arranged in the immediate vicinity of the third region C so as not to obstruct the blowing of the fan 10. As shown in FIG.
- the third convex portion 7c is formed along the first convex portion 7a.
- the direction and shape of the third convex portion 7c are not limited to the examples shown in FIGS. 18 and 19, and can be changed as necessary. For example, by setting the projecting dimension of the third projecting portion 7c to be larger than the projecting dimension of the radiation fin 8, the efficiency of heat transport by the third projecting portion 7c may be enhanced.
- the heat of the second heat-generating component 4b is transferred to the third heat generating component 4b as compared with the case where only the first convex portion 7a is provided.
- the cross-sectional area for transportation to region C is increased. This reduces the thermal resistance when the heat of the second heat-generating component 4b is transported to the third area C, so that the heat dissipation performance of the electronic control unit 100 can be improved.
- the third convex portion 7c extends from the vicinity of the second area B to the front of the third area C, but is not provided in the third area C. As shown in FIG.
- the present invention is not limited to the above-described embodiments, and includes various modifications.
- the details of the present invention have been described for easy understanding, but the present invention is not necessarily limited to having all the configurations described in the above-described embodiments.
- part of the configuration of one embodiment can be replaced with the configuration of another embodiment.
- add the configuration of another embodiment to the configuration of one embodiment.
- REFERENCE SIGNS LIST 1 housing 3 circuit board 4a first heat-generating component 4b second heat-generating component 5a first heat transfer material 5b second heat transfer material 6a first boss , 6b... second boss, 7a... first protrusion, 7b... second protrusion, 7c... third protrusion, 8, 8a, 8b, 8c... radiating fin, 9... connector, 10... fan , 11... Heat transfer member 100... Electronic control device A... First area B... Second area C... Third area F... Blowing direction G1... First interval G2... Second interval of
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Abstract
Description
本願は、上記課題を解決する手段を複数含んでいるが、その一つを挙げるならば、第一のボスおよび第二のボスを含む複数のボスが内面に設けられた筐体と、筐体の内部空間に収容される回路基板と、回路基板上に搭載され、第一のボスを介して筐体と熱的に接続される第一の発熱部品と、回路基板上に搭載され、第二のボスを介して筐体と熱的に接続される第二の発熱部品と、筐体の外面に形成された複数の放熱フィンと、筐体の外面に搭載され、放熱フィンに向けて送風するファンと、を備える電子制御装置であって、筐体の内面には、回路基板側に突出する第一の凸部が設けられ、筐体において、第一の発熱部品の搭載位置直上部分の領域を第一の領域、第二の発熱部品の搭載位置直上部分の領域を第二の領域、ファンの送風方向における第一の領域とファンとの間の領域を第三の領域としたときに、第一の凸部の一端側は、第二のボスと接続する状態に配置され、第一の凸部の他端側は、第二の発熱部品が発生する熱を第三の領域へ輸送するように第三の領域に向かって延在している。
上記した以外の課題、構成および効果は、以下の実施形態の説明により明らかにされる。
図面において示す各構成要素の位置、大きさ、形状、範囲などは、発明の理解を容易にするため、実際の位置、大きさ、形状、範囲などを表していない場合がある。このため、本発明は、必ずしも、図面に開示された位置、大きさ、形状、範囲などに限定されない。
図1は、第1実施形態に係る電子制御装置の外観を示す斜視図であり、図2は、図1に示す電子制御装置の上面図である。また、図3は、図2に示す電子制御装置のI-I線断面図であり、図4は、図2に示す電子制御装置のII-II線断面図である。
図5に示すように、上部筐体1aの下面には、第一のボス6aと第二のボス6bと第一の凸部7aとが設けられている。上部筐体1aの下面は、筐体1の内面に相当する。第一のボス6a、第二のボス6bおよび第一の凸部7aは、いずれも上部筐体1aの下面から回路基板3側に突出する状態で設けられている。上部筐体1aは、好ましくは、アルミニウムやアルミニウム合金など、熱伝導性に優れた金属材料により形成されている。上部筐体1aは、例えば、アルミダイキャストによって得られる鋳造品である。その場合は、上部筐体1aをADC12によって形成することが望ましい。なお、上部筐体1aは、アルミニウム等に限らず、例えば、鉄などの板金により形成することで低コスト化を図ることができ、あるいは樹脂材料等の非金属材料により形成することで軽量化を図ることもできる。下部筐体1bも同様に、アルミニウム等のほか、鉄などの板金、あるいは樹脂材料等の非金属材料により形成することができる。
まず、強制空冷領域Dにおける放熱フィン8の間隔を狭くすると、放熱フィン8による放熱面積が広く確保されるため、強制空冷領域Dでの放熱量を増やすことができる。これに対し、自然空冷領域Eにおける放熱フィン8の間隔を狭くすると、自然対流による空気が放熱フィン8の奥側(上部筐体1aの上面に近い側)に入り込みにくくなる。このため、強制空冷領域Dおよび自然空冷領域Eの両方で効率良く放熱するには、強制空冷領域Dにおける放熱フィン8の間隔を、自然空冷領域Eにおける放熱フィン8の間隔と同じか、それよりも狭くするとよい。
図6は、第2実施形態に係る電子制御装置を図2のI-I線位置で断面した状態を示す図であり、図7は、第2実施形態に係る電子制御装置を図2のII-II線位置で断面した状態を示す図である。
図6および図7に示すように、第2実施形態に係る電子制御装置100は、上述した第1実施形態の構成(図3、図4)と比較して、回路基板3と第一の凸部7aとの間に伝熱部材11が設けられている点が異なる。伝熱部材11は、第一の凸部7aと回路基板3とを熱的に接続する部材である。回路基板3の上面には、レジスト等によって覆われていない金属部分が露出し、この金属部分に伝熱部材11が接触している。
図10は、第3実施形態に係る電子制御装置の上面図であり、図11は、図10に示す電子制御装置が備える上部筐体の下面図である。
図10および図11に示すように、第3実施形態に係る電子制御装置100は、上述した第1実施形態の構成(図2、図5)と比較して、第一の凸部7aの形状が異なる。第一の凸部7aの長手方向において、第一の凸部7aの一端側(図11の左側)は第二のボス6bの2つの辺に接続する状態で配置されている。また、第一の凸部7aは、第一のボス6aと干渉しないように、第二の領域Bから第三の領域Cに向かって徐々に幅が狭くなるように形成されている。また、第一の凸部7aの他端側は、上述した第1実施形態と同様に、第二の領域Bから第三の領域Cに向かって延在している。また、第一の凸部7aの他端側は、第三の領域Cを横切る状態に配置されている。
図12は、第4実施形態に係る電子制御装置の上面図である。
図12に示すように、第4実施形態に係る電子制御装置100は、上述した第1実施形態の構成(図2)と比較して、複数の放熱フィン8の向きが異なる。以下、詳しく説明する。
図13は、第5実施形態に係る電子制御装置の上面図である。また、図14は、図13に示す電子制御装置のIV-IV線断面図であり、図15は、図13に示す電子制御装置のV-V線断面図である。また、図16は、図13に示す電子制御装置が備える上部筐体の下面図である。
図13~図16に示すように、第5実施形態に係る電子制御装置100は、上述した第1実施形態の構成(図1~図5)と比較して、筐体1に第二の凸部7bが設けられている点が異なる。第二の凸部7bは、上部筐体1aの下面に設けられている。また、第二の凸部7bは、上部筐体1aの下面から回路基板3側に突出する状態で設けられている。すなわち、第二の凸部7bは、上部筐体1aの下面に凸形状の突起部として形成されている。第二の凸部7bは、図16に示すように直角に曲がった形状、すなわちL字形に形成されている。
図17は、第6実施形態に係る電子制御装置の上面図である。
図17に示すように、第6実施形態に係る電子制御装置100は、上述した第5実施形態の構成(図13)と比較して、上部筐体1aの上面に形成された複数の放熱フィン8のうち、ファン10の送風方向に配置された放熱フィン8の向きが異なる。
具体的には、ファン10の送風方向に配置された複数の放熱フィン8のうち、所定の放熱フィン8cは、ファン10の送風領域(強制空冷領域D)を第二の領域B側に拡張するように、ファン10の送風方向に対して傾斜している。また、ファン10の送風方向と直交する方向で隣り合う放熱フィン8c間の間隔は、ファン10から離れるにつれて徐々に大きくなっている。また、個々の放熱フィン8cに着目すると、放熱フィン8cの一端は第三の領域Cに配置され、放熱フィン8cの他端は、放熱フィン8c自体の傾きによって放熱フィン8cの一端よりも自然空冷領域側(図17の右側)に配置されている。
図18は、第7実施形態に係る電子制御装置の上面図であり、図19は、図18に示す電子制御装置のIII-III線断面図である。
図18および図19に示すように、第7実施形態に係る電子制御装置100は、上述した第1実施形態の構成(図2、図4)と比較して、筐体1の上部筐体1aに第三の凸部7cが設けられている点が異なる。第三の凸部7cは、放熱フィン8と共に上部筐体1aの上面に設けられている。第三の凸部7cは、上部筐体1aの厚み方向において、第一の凸部7aと反対側に突出している。上部筐体1aの上面を基準とする第三の凸部7cの突出寸法は、放熱フィン8の突出寸法と同一に設定されている。また、第三の凸部7cは、第二の領域Bの近傍から第三の領域Cの手前まで延在している。より具体的には、第三の凸部7cの長手方向において、第三の凸部7cの一端(図18の右端)は、第一の凸部7aの一端とほぼ同じ位置に配置され、第三の凸部7cの他端は、ファン10の送風を阻害しないように第三の領域Cの直近に配置されている。また、第三の凸部7cは、第一の凸部7aに沿って形成されている。なお、第三の凸部7cの方向や形状は図18および図19に示す例に限らず、必要に応じて変更可能である。例えば、第三の凸部7cの突出寸法を放熱フィン8の突出寸法よりも大きく設定することにより、第三の凸部7cによる熱輸送の効率を高めてもよい。
Claims (15)
- 第一のボスおよび第二のボスを含む複数のボスが内面に設けられた筐体と、
前記筐体の内部空間に収容される回路基板と、
前記回路基板上に搭載され、前記第一のボスを介して前記筐体と熱的に接続される第一の発熱部品と、
前記回路基板上に搭載され、前記第二のボスを介して前記筐体と熱的に接続される第二の発熱部品と、
前記筐体の外面に形成された複数の放熱フィンと、
前記筐体の外面に搭載され、前記放熱フィンに向けて送風するファンと、
を備える電子制御装置であって、
前記筐体の内面には、前記回路基板側に突出する第一の凸部が設けられ、
前記筐体において、前記第一の発熱部品の搭載位置直上部分の領域を第一の領域、前記第二の発熱部品の搭載位置直上部分の領域を第二の領域、前記ファンの送風方向における前記第一の領域と前記ファンとの間の領域を第三の領域としたときに、
前記第一の凸部の一端側は、前記第二のボスと接続する状態に配置され、
前記第一の凸部の他端側は、前記第二の発熱部品が発生する熱を前記第三の領域へ輸送するように前記第三の領域に向かって延在している
電子制御装置。 - 前記第一の凸部の一端側は、前記第二のボスの少なくとも2つの辺に接続するように配置されている
請求項1に記載の電子制御装置。 - 前記筐体の内面には、前記回路基板側に突出する第二の凸部がさらに設けられ、
前記第二の凸部の一端側は、前記第二のボスと接続する状態で配置され、
前記第二の凸部の他端側は、前記ファンの送風方向において前記第一の領域の下流側まで延在している
請求項1に記載の電子制御装置。 - 前記第一の凸部の一部と前記第二の凸部の一部は、前記第二のボスを介して連続するよう配置されている
請求項3に記載の電子制御装置。 - 前記第二の凸部における前記ファンとの最接近点と前記ファンとの距離は、前記第一の凸部における前記ファンとの最接近点と前記ファンとの距離よりも長い
請求項3に記載の電子制御装置。 - 前記ファンの送風方向において、前記第一の凸部と前記第一のボスとは第一の間隔をあけて配置され、前記第二の凸部と前記第一のボスとは第二の間隔をあけて配置されている
請求項3に記載の電子制御装置。 - 前記第一の凸部と前記回路基板とを熱的に接続する伝熱部材をさらに備える
請求項1に記載の電子制御装置。 - 前記筐体の外面に形成された複数の放熱フィンのうち、前記ファンの送風方向に配置された所定の放熱フィンが、前記ファンの送風領域を前記第二の領域側に拡張するように、前記ファンの送風方向に対して傾斜している
請求項1に記載の電子制御装置。 - 前記筐体には、前記第一の凸部と反対側に突出する第三の凸部が設けられ、
前記第三の凸部は、前記第二の領域の近傍から前記第三の領域の手前まで延在している
請求項1に記載の電子制御装置。 - 前記第一の発熱部品の発熱量は、前記第二の発熱部品の発熱量よりも多い
請求項1に記載の電子制御装置。 - 前記筐体の一辺には外部接続用のコネクタが配置され、
前記ファンは前記コネクタの近傍に配置されている
請求項1に記載の電子制御装置。 - 前記ファンは、遠心ファンまたはブロワファンである
請求項1に記載の電子制御装置。 - 前記第一の発熱部品と前記第一のボスは、第一の伝熱材によって接続され、
前記第二の発熱部品と前記第二のボスは、第二の伝熱材によって接続されている
請求項1に記載の電子制御装置。 - 前記筐体の外面に形成された複数の放熱フィンのうち、前記第二の領域の近傍に配置された放熱フィンは、前記ファンの送風領域に向けて、前記第一の領域側に配置された放熱フィンとは異なる角度で配置されている
請求項1に記載の電子制御装置。 - 前記第二の領域の近傍に配置された放熱フィンは、前記ファンの送風方向と直交する向きに配置されている
請求項14に記載の電子制御装置。
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| CN202280075052.8A CN118235531A (zh) | 2021-11-30 | 2022-10-12 | 电子控制装置 |
| US18/701,402 US20250240934A1 (en) | 2021-11-30 | 2022-10-12 | Electronic control device |
| DE112022004507.8T DE112022004507T5 (de) | 2021-11-30 | 2022-10-12 | Elektronische steuervorrichtung |
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| JP2021-193791 | 2021-11-30 | ||
| JP2021193791A JP7709902B2 (ja) | 2021-11-30 | 2021-11-30 | 電子制御装置 |
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| PCT/JP2022/037975 Ceased WO2023100480A1 (ja) | 2021-11-30 | 2022-10-12 | 電子制御装置 |
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| Country | Link |
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| US (1) | US20250240934A1 (ja) |
| JP (1) | JP7709902B2 (ja) |
| CN (1) | CN118235531A (ja) |
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| WO2023058442A1 (ja) * | 2021-10-07 | 2023-04-13 | 日立Astemo株式会社 | 電子制御装置 |
| DE102024108242A1 (de) * | 2023-03-31 | 2024-10-02 | Eaton Intelligent Power Limited | Steuereinheit mit kühlung |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002368467A (ja) * | 2001-06-08 | 2002-12-20 | Toshiba Corp | 発熱体を内蔵する電子機器およびこの電子機器に用いる冷却装置 |
| JP2009128947A (ja) * | 2007-11-19 | 2009-06-11 | Toshiba Corp | 電子機器 |
| JP2011134769A (ja) * | 2009-12-22 | 2011-07-07 | Shinko Electric Ind Co Ltd | 放熱部品及び電子部品装置 |
| JP2020047843A (ja) * | 2018-09-20 | 2020-03-26 | 日立オートモティブシステムズ株式会社 | 電子制御装置 |
| JP2021048199A (ja) * | 2019-09-17 | 2021-03-25 | 日立オートモティブシステムズ株式会社 | 電子制御装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050128710A1 (en) * | 2003-12-15 | 2005-06-16 | Beiteimal Abdlmonem H. | Cooling system for electronic components |
| JP2012227350A (ja) | 2011-04-20 | 2012-11-15 | Funai Electric Co Ltd | 発熱部品の冷却構造 |
| JP7136553B2 (ja) * | 2017-12-08 | 2022-09-13 | 日立Astemo株式会社 | 電子制御装置 |
| JP6917287B2 (ja) * | 2017-12-11 | 2021-08-11 | 日立Astemo株式会社 | 電子制御装置 |
| JP7529536B2 (ja) * | 2020-10-27 | 2024-08-06 | 日立Astemo株式会社 | 電子制御装置 |
| WO2022180909A1 (ja) * | 2021-02-24 | 2022-09-01 | 日立Astemo株式会社 | 車載用電子装置 |
-
2021
- 2021-11-30 JP JP2021193791A patent/JP7709902B2/ja active Active
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2022
- 2022-10-12 WO PCT/JP2022/037975 patent/WO2023100480A1/ja not_active Ceased
- 2022-10-12 DE DE112022004507.8T patent/DE112022004507T5/de active Pending
- 2022-10-12 CN CN202280075052.8A patent/CN118235531A/zh active Pending
- 2022-10-12 US US18/701,402 patent/US20250240934A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002368467A (ja) * | 2001-06-08 | 2002-12-20 | Toshiba Corp | 発熱体を内蔵する電子機器およびこの電子機器に用いる冷却装置 |
| JP2009128947A (ja) * | 2007-11-19 | 2009-06-11 | Toshiba Corp | 電子機器 |
| JP2011134769A (ja) * | 2009-12-22 | 2011-07-07 | Shinko Electric Ind Co Ltd | 放熱部品及び電子部品装置 |
| JP2020047843A (ja) * | 2018-09-20 | 2020-03-26 | 日立オートモティブシステムズ株式会社 | 電子制御装置 |
| JP2021048199A (ja) * | 2019-09-17 | 2021-03-25 | 日立オートモティブシステムズ株式会社 | 電子制御装置 |
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| Publication number | Publication date |
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| CN118235531A (zh) | 2024-06-21 |
| JP2023080447A (ja) | 2023-06-09 |
| US20250240934A1 (en) | 2025-07-24 |
| JP7709902B2 (ja) | 2025-07-17 |
| DE112022004507T5 (de) | 2024-08-14 |
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