JP2003298268A - Casing structure of electronic controller, and cooling structure for the electronic controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a casing structure of an electronic controller and a cooling structure for the electronic controller capable of effectively cooling the electronic controller (particularly a heating device). <P>SOLUTION: A flow adjusting mechanism 45 is provided on the surface 13a of an electronic controller 1 on the side of a case 13, and the flow adjusting mechanism 45 comprises a fin 47 being 4 plate members. Namely, each fin 47 is bent gradually inside, and a flow passage extending from an upstream side of air to a lower stream side is disposed to be narrow owing to the fins 47. Accordingly, a cross area of a region of the air flow passage 49 put between the fins 41, and hence an area of an air flow passage 41 is narrowed. Further, a heat dissipation section 43 is disposed on the side of a tip end of the flow adjusting mechanism 45, i.e., on the downstream side of an air outlet. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing structure of an electronic control unit and a cooling structure for the electronic control unit, which are arranged in, for example, an engine room of a vehicle.

[0002]

2. Description of the Related Art Conventionally, for example, an electronic control unit (for example, an engine ECU) used for controlling a vehicle includes a microcomputer for performing arithmetic processing, an input / output circuit connected to an external load or a sensor, and a power source for these circuits. A power supply circuit and the like for supplying the power are arranged on the substrate, and they are housed in a casing including a case and a cover, for example.

Of these, electronic components in the electronic control unit, particularly electronic components with large heat generation such as drive elements (heating elements)
Has a tendency to rise in temperature, and if the temperature rises excessively, it hinders its operation. Therefore, various measures for heat dissipation have been taken. As a countermeasure, for example, a method in which a heating element is brought into close contact with the housing and the housing is arranged at a place where air flows is adopted.

This method increases the efficiency of heat transfer between the housing and the air by placing the housing in a stream of air,
This is a technique for suppressing the temperature rise of electronic components such as heating elements inside the housing by efficiently cooling the housing. In the case of performing such cooling, a part (heat dissipation part) for increasing heat dissipation efficiency of the heat generating element is set by contacting the heat generating element with the housing, but in order to suppress the temperature rise inside the housing, It is important to cool the heat sink.

[0005]

However, in the above-mentioned conventional technique, the air flowing along the surface of the housing is only flowing naturally, and therefore the heat radiating portion cannot be cooled effectively. There was a problem.

For example, it is conceivable to attach the housing to the intake module to cool it, but in this case, in the idle state of the engine, the amount of air itself decreases, so the air flow near the heat radiating section also decreases, Cooling effect becomes low. The present invention has been made to solve the above problems, and provides a housing structure of an electronic control device and a cooling structure of the electronic control device that can efficiently cool the electronic control device (in particular, a heating element). The purpose is to

[0007]

(1) According to the invention of claim 1, an electronic component including a heating element is housed in a housing, and the heating element is placed close to a heat radiation portion of the housing or The present invention relates to a housing structure of an electronic control device arranged in contact (directly or indirectly through another member), and in the present invention, an air flow is guided to the outside of the housing. A flow adjusting mechanism for adjusting the flow velocity is provided, and the flow adjusting mechanism is configured to increase the flow velocity of the air on the outer surface of the heat radiating portion of the housing from the upstream side of the heat radiating portion.

According to the present invention, a flow adjusting mechanism is provided outside the housing so that the flow velocity of air (wind) on the outer surface of the heat radiating portion is higher than that on the upstream side of the heat radiating portion. Thereby, the cooling efficiency in the heat dissipation part can be improved. That is,
Regardless of where the heat sink is located in the housing, a flow control mechanism is provided to guide the wind to the heat sink to efficiently collect the wind and increase the flow velocity of the wind hitting the heat sink to perform effective cooling. You can Further, since the wind can be collected by providing the flow adjusting mechanism, the cooling efficiency can be improved even when the air flow rate is small, for example, at the time of idling.

The heat radiating section refers to a part of the housing corresponding to the position where the heat generating element is arranged, and the heat of the heat generating element is radiated to the outside through the heat radiating section. (2) The invention of claim 2 is characterized in that the cross-sectional area of the flow path from the upstream side of the air to the downstream heat radiating portion side is made smaller from the upstream side to the downstream side.

The present invention exemplifies the structure of the flow control mechanism. That is, the flow velocity of the wind in the vicinity of the heat radiating portion can be increased by reducing the cross-sectional area of the flow path from the upstream side of the air to the downstream heat radiating portion side as it goes from the upstream side to the downstream side.

(3) In the invention of claim 3, the flow control mechanism has a plurality of fins provided on the outside of the casing, and the fins are located from the upstream side to the downstream side of the heat radiation portion of the air. It is characterized in that the closer it gets, the narrower the interval becomes. In the present invention, wherever the heat dissipation part is located in the housing, by providing the fins with a narrow interval toward the heat dissipation part, the air is efficiently collected and the flow velocity of the wind hitting the heat dissipation part is increased,
Cooling can be performed effectively. Further, even if the air flow rate is small, the cooling efficiency can be improved.

The fin is a plate-shaped member provided upright. (4) In the invention of claim 4, the flow control mechanism has a concave cut portion provided outside the casing, and the shape of the cut portion is from an upstream side of the air to a downstream side of the air. It is characterized in that the width thereof becomes narrower toward the heat radiation portion side.

In the present invention, wherever the heat dissipation portion is located in the housing, the notch is provided in the housing to efficiently collect the air and increase the flow velocity of the wind hitting the heat dissipation portion to effectively cool the air. It can be carried out. Further, even if the air flow rate is small, the cooling efficiency can be improved.

(5) In the invention of claim 5, the flow adjusting mechanism has an inclined surface provided outside the casing, and the inclined surface has the heat radiating portion on the downstream side of the air. Is characterized by. In the present invention, no matter where the heat radiating section is located in the housing, the inclined surface is provided on the housing, so that the flow velocity of the wind hitting the heat radiating section can be increased and effective cooling can be performed. Further, even if the air flow rate is small, the cooling efficiency can be improved.

(6) In the invention of claim 6, the flow control mechanism has a tubular portion provided outside the casing, and the tubular portion extends from the upstream side to the downstream side of the air. It is characterized in that the cross-sectional area of the flow path becomes smaller as it goes further. According to the present invention, by providing a hollow cylindrical portion in the housing, the wind can be efficiently collected and cooled in the housing regardless of where the heat dissipation portion is located in the housing. Further, even if the air flow rate is small, the cooling efficiency can be improved.

(7) In the invention of claim 7, the flow adjusting mechanism has a wind collecting cover detachably attached to the outer surface of the housing, and the wind collecting cover is on the upstream side of the air. It is characterized in that the cross-sectional area of the flow passage formed by the air collecting cover becomes smaller as it goes to the downstream side.

In the present invention, no matter where the heat radiating portion is located in the housing, the air collecting cover for collecting the air is attached to the housing so that the air can be efficiently collected and cooled in that portion. Further, even if the air flow rate is small, the cooling efficiency can be improved. Further, when heat radiation is unnecessary and the air collecting cover is no longer needed, the air collecting cover can be removed, so that there is an advantage that the versatility of the electronic control device is high.

(8) The invention of claim 8 is characterized in that a protrusion is provided on the outside of the heat dissipation portion. In the present invention,
As compared with a flat heat radiating portion, the projections are directly exposed to the wind, so that the heat radiating property is improved.

(9) The invention according to claim 9 is characterized in that the protrusion is provided with an inclination in which the downstream side of the air is higher than the upstream side. In the present invention, the wind directly hits the slope, which is the surface of the projection, and the flow of the wind can be made smoother than in the case of the flat heat dissipation portion, so that the heat dissipation is further improved.

(10) According to the tenth aspect of the invention, the projection is formed in a triangular pyramid shape (hence the wedge shape in plan view), and the apex of the projection in plan view is arranged on the upstream side of the air. Characterize. In the present invention, since the shape of the protrusion arranged outside the heat dissipation portion is a substantially triangular pyramid, and the apex of the planar shape is arranged on the upstream side of the air flow, it is easy for the entire protrusion to receive wind efficiently. As a result, the heat dissipation is enhanced and the cooling effect is further enhanced.

(11) The invention of claim 11 is characterized in that a plate material parallel to the air and the flow is provided outside the heat dissipation portion. In the present invention, one or a plurality of plate members that are parallel to the air and the flow are erected on the outside of the heat radiating portion, so that the whole plate material is more likely to receive wind efficiently and has a higher heat radiating property than a flat heat radiating portion. And the cooling effect is further enhanced.

(12) According to a twelfth aspect of the present invention, an electronic component including a heating element is housed in a housing, and the heating element is arranged close to or in contact with a heat dissipation portion of the housing to cool an electronic control unit. The present invention relates to a structure, and in the present invention,
It is characterized in that the outer surface of the housing having the heat dissipation portion is arranged obliquely with respect to the flow of air.

In the present invention, the outer surface of the housing is arranged obliquely with respect to the flow of air, so that the outer surface of the housing hits the heat dissipation portion as in the case where the outer surface of the housing is provided with the slant surface. The flow velocity of the wind can be increased and effective cooling can be performed. Further, even if the air flow rate is small, the cooling efficiency can be improved.

(13) According to the thirteenth aspect of the present invention, when the electronic control unit is attached to the intake module, the outer surface of the housing having the heat radiating portion is arranged so as to face the flow path of the intake module. Is characterized by. The present invention exemplifies an arrangement state when the electronic control unit is attached to the intake module.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an example (embodiment) of an embodiment of a casing structure of an electronic control unit and a cooling structure of the electronic control unit of the present invention will be described. (Example 1) a) First, the housing structure of the electronic control unit of Example 1 is shown in FIG.
It will be described based on.

Incidentally, FIG. 1 is an exploded perspective view of the electronic control unit. As shown in FIG. 1, an electronic control unit (ECU) 1 in the present embodiment is an electronic device that performs engine control, and has a substantially rectangular parallelepiped shape whose thickness direction is thin. The electronic control unit 1 includes a printed circuit board 5 on which various electronic components (for example, a heating element such as a drive element) 3 are mounted, and a connector connected to the printed circuit board 5, which is a substantially rectangular parallelepiped casing having a thin thickness direction. It is housed in 9.

The casing 9 has a shallow box shape with an open bottom in the figure, and a resin cover 11 made of low thermal conductivity (for example, polybutadiene terephthalate (PBT)).
And the cover 11 has a shallow box shape with an open upper part in the figure.
It is composed of a metal case 13 having a higher thermal conductivity, such as aluminum.

The cover 11 made of resin and the case 13 made of metal are joined together at their outer peripheral ends, and are joined together at their joints with a soft-curable adhesive. still,
The case 13 includes an intake module 15 (see FIG. 2).
The screw part 17 for fixing to is provided.

B) Next, the mounting state of the electronic control unit 1 of this embodiment will be described with reference to FIGS. 2 and 3. Incidentally, FIG.
FIG. 3 is an explanatory diagram showing a mounted state of the electronic control device, and FIG. 3 is an explanatory diagram schematically showing the mounted state broken away.

As shown in FIG. 2, an engine head cover 29 is arranged above the engine (not shown), and the air cleaner 3 is provided above the head cover 29.
1, the intake module 15 containing 1 is attached,
An intake manifold 33 is connected to the intake module 15. The intake module 15 is a device for introducing air from the outside to the engine side.

The intake module 15 has a structure shown in FIG.
As shown in FIG. 2, an opening 35 is provided in the upper portion of the air cleaner 31, and the electronic control unit 1 is mounted in the opening 35 as shown in FIG. 2B. That is, as schematically shown in FIG. 3, inside the intake module 15, an air passage 41 is provided from the outside to the engine side through the intake hole 39, and this air passage 41 is provided. The electronic control unit 1 is attached so as to face.

More specifically, the metal case 13 side of the electronic control unit 1 faces the air flow path 41, and the resin cover 11 side faces the outside of the intake module 15, that is, in the engine room. It is installed so as to be exposed to the atmosphere. Further, as will be described later in detail, the electronic component 3 which is a heating element is attached to the heat dissipation portion 43 on the inner surface of the case 13 (upper part of the drawing), and the outer surface of the case 13 (shown in the drawing) Downward), the flow control mechanism 4
5 are provided.

The heat radiating portion 43 is a part of the housing 9 in which the electronic component 3 is arranged, and its air flow (wind).
The outer surface in contact with is the heat dissipation surface. c) Next, the flow control mechanism 45 will be described with reference to FIG. Incidentally, FIG. 4A shows a case 1 of the electronic control unit 1.
3 is a perspective view showing the 3 side, and FIG. 4 (b) is an explanatory view showing a plane on the case 13 side.

As shown in FIG. 4, the surface (bottom surface: above FIG. 4A) 13a of the electronic control unit 1 on the case 13 side is
A flow adjusting mechanism 45 is provided, and the flow adjusting mechanism 45 is composed of four fins 47 which are plate materials. Specifically, the two long fins 47 on the outside thereof
a and 47d are gently curved inward, and the two short fins 47b and 47c on the inner side are also gently curved inward, and these fins 47 allow the passage of air from the upstream side to the downstream side. Are arranged to be narrow.

That is, the area of the air passage 49 sandwiched by the fins 47, that is, the cross-sectional area of the air passage 49 is set to be narrower from the left to the right in FIG. Also,
The heat radiating portion 43 is arranged on the tip end side of the flow control mechanism 45, that is, on the downstream side which is the outlet of air.

D) As described above, in this embodiment, the flow adjusting mechanism 45 (constituted by the fins 47) for guiding the flow of air and adjusting the flow velocity of air is provided outside the housing 9 of the electronic control unit 1. In addition to being provided, the flow adjusting mechanism 45 is configured to increase the flow velocity of air on the outer surface of the heat radiating portion 43 of the housing 9 from the upstream side of the heat radiating portion 43.

As a result, the cooling efficiency of the heat dissipation portion 43 can be improved. That is, regardless of where the heat dissipation portion 43 is located in the housing 9, it is possible to efficiently collect the air, increase the flow velocity of the wind hitting the heat dissipation portion 43, and perform effective cooling. Further, since the wind can be collected by providing the flow adjusting mechanism 45, the cooling efficiency can be improved even when the air flow rate is small such as during idling. (Embodiment 2) Next, the housing structure of the electronic control unit of Embodiment 2 will be described, but the description of the same contents as in Embodiment 1 will be omitted.

A) An electronic control unit according to the second embodiment will be described with reference to FIG. Note that FIG. 5A is a perspective view showing the case side of the electronic control device, and FIG. 5B is an explanatory view showing the plane of the case side. As shown in FIG. 5, the electronic control unit 51 of this embodiment is mounted on the intake module as in the first embodiment, and the housing 53 of the electronic control unit 51 includes a resin cover 55 and The case 57 is made of metal.

The surface on the case 57 side (bottom surface: FIG. 5)
A flow adjusting mechanism 59 is provided on (a) the upper side 57 a, and the flow adjusting mechanism 59 is provided on the surface 5 of the case 57.
It is composed of a concave cut portion 61 provided in 7a. The planar shape of the cut portion 61 (as viewed from the front side of the paper surface of FIG. 5B) is a funnel shape, and the heat radiating portion 6 from the upstream side to the downstream side of the air.
The width becomes narrower toward the 3rd side. The heat dissipation portion 63 is arranged at the narrowest tip portion 61a.

That is, the area of the air flow passage 65 formed by the cutout portion 61, that is, the cross-sectional area of the air flow passage 65 is set to become narrower from the left to the right in FIG. b) As described above, in this embodiment, since the flow adjusting mechanism 59 is formed by the notch 61, the same effect as that of the first embodiment can be obtained. (Embodiment 3) Next, the housing structure of the electronic control unit of Embodiment 3 will be described, but the description of the same contents as in Embodiment 1 will be omitted.

A) An electronic control unit according to the third embodiment will be described with reference to FIG. 6A is a perspective view showing the case side of the electronic control device, and FIG. 6B is an explanatory view showing the side surface of the electronic control device. As shown in FIG. 6, the electronic control unit 71 of this embodiment is mounted on the intake module as in the case of the first embodiment.
The case 73 includes a resin cover 75 and a metal case 7.
It consists of 7.

The surface on the case 77 side (bottom surface: FIG. 6)
A flow adjusting mechanism 79 is provided on (a) the upper side 77a, and the flow adjusting mechanism 79 is formed such that the surface 77a of the case 77 is inclined with respect to the flow of air. Then, in the vicinity of the upper end of the inclined surface 77a, that is, on the surface 77a, a heat radiating portion 78 is provided on the downstream side of the air (where the electronic component 3 is arranged inside).

B) As described above, in this embodiment, the surface 77a of the case 77 is inclined with respect to the flow of air, so that the velocity of the air hitting the surface 77a increases and the surface 77a increases. Is guided to the heat dissipation portion 78 along the inclination of. As a result, similar to the first embodiment, a high heat dissipation effect is obtained. Further, in the present embodiment, the shape of the case 77 is not so complicated, and therefore, there is an advantage that the case 77 can be easily manufactured. (Embodiment 4) Next, the housing structure of the electronic control unit of Embodiment 4 will be described, but the description of the same contents as in Embodiment 1 will be omitted.

A) An electronic control unit according to the fourth embodiment will be described with reference to FIG. 7. FIG. 7 is a perspective view showing the case side of the electronic control unit. As shown in FIG. 7, the electronic control unit 81 of the present embodiment is mounted on the intake module as in the case of the first embodiment, and the housing 83 of the electronic control unit 81 has a resin cover 85 and The case 87 is made of metal.

A flow adjusting mechanism 89 is provided on the surface (bottom surface: the upper side in FIG. 7) 87a on the case 87 side, and a heat radiating section 91 is provided on the downstream side (right side in the same figure) of the flow adjusting mechanism 89. Has been. The flow adjusting mechanism 89 includes a case 87.
Of the air passage 9 which is hollow inside the tubular portion 93.
5 is the flow path 9 from the upstream side to the downstream side of the air.
The cross-sectional area of 5 becomes small.

B) In this embodiment, the same effect as that of the first embodiment can be obtained. Further, since the wind can be efficiently collected in the tubular portion 93, that is, since the air that has flowed into the tubular portion 93 does not leak out in the middle, cooling can be performed efficiently even if the air flow rate is low. It can be carried out. (Embodiment 5) Next, the housing structure of the electronic control unit of Embodiment 5 will be described, but the description of the same contents as in Embodiment 1 will be omitted.

A) An electronic control unit according to the fifth embodiment will be described with reference to FIG. 8 is a perspective view showing the case side of the electronic control unit. As shown in FIG. 8, the electronic control unit 101 of the present embodiment is mounted on the intake module as in the case of the first embodiment, and the housing 103 of the electronic control unit 101 includes a resin cover 105 and The case 107 is made of metal.

A flow adjusting mechanism 109 is provided on the surface 107a on the case 107 side (bottom surface: upper side in FIG. 8).
A heat radiating section 111 is provided on the downstream side (right side in the figure) of the flow control mechanism 109. The flow control mechanism 109
Is configured by a box-shaped portion 113 detachably attached to the surface 107a of the case 107 (a wind collecting cover having the same vertical and horizontal dimensions of the case 107).

That is, on the surface of the box-shaped portion 113 on the case 107 side, a concave cut portion 11 having a shape similar to that of the second embodiment is formed.
5 is formed. Specifically, the planar shape of the cut portion 115 (as viewed from above in FIG. 8) is a funnel shape,
The width of the air becomes narrower as it goes from the upstream side to the downstream side of the heat radiation section 111. The heat dissipation portion 111 is arranged at the narrowest tip portion 115a.

B) According to this embodiment, the same effect as that of the fourth embodiment can be obtained. Further, the box-shaped portion 113 that constitutes the flow control mechanism 109 is removable, and when heat dissipation is not necessary (therefore, the box-shaped portion 113 is unnecessary), the box-shaped portion 11
Since 3 can be removed, there is an advantage that the versatility of the electronic control unit 101 is high. (Embodiment 6) Next, the housing structure of the electronic control unit of Embodiment 6 will be described, but the description of the same contents as in Embodiment 1 will be omitted.

A) An electronic control unit according to the sixth embodiment will be described with reference to FIG. 9A is a perspective view showing the case side of the electronic control device, and FIG. 9B is a side view of the electronic control device. As shown in FIG. 9, the electronic control unit 121 of the present embodiment is mounted on the intake module as in the case of the first embodiment, and the housing 123 of the electronic control unit 121 includes a resin cover 125 and a cover 125. Metal case 12
It consists of 7.

The surface on the case 127 side (bottom surface: FIG. 9).
A flow adjustment mechanism 129 is provided on the upper side (upper part of (a)) 127a, and a heat radiating portion 131 is provided on the downstream side of the flow adjustment mechanism 129 (on the right side in the figure). The flow adjusting mechanism 129 is composed of four fins 133 as in the first embodiment, and the air flow path 135 surrounded by the fins 133 is
The width of the air becomes narrower as it goes from the upstream side to the downstream side of the heat radiation portion 131.

Further, on the surface 131a of the heat dissipation part 131,
A substantially rectangular parallelepiped (made of the same material as the case 127) metallic projection 137 is provided. b) In this embodiment, since the heat dissipation portion 131 is provided with the protrusion 137, the projection 137 is directly exposed to the air as compared with the planar heat dissipation portion, and the heat dissipation is further improved. is there. (Embodiment 7) Next, the housing structure of the electronic control unit of Embodiment 7 will be described, but the description of the same contents as in Embodiment 1 will be omitted.

A) An electronic control unit according to the seventh embodiment will be described with reference to FIG. 10 (a) is a perspective view showing the case side of the electronic control device, and FIG. 10 (b) is a side view of the electronic control device. As shown in FIG. 10, the electronic control unit 141 of this embodiment is mounted on the intake module as in the case of the first embodiment.
The first housing 143 includes a resin cover 145 and a metal case 147.

The surface on the case 147 side (bottom surface: FIG. 10)
A flow adjusting mechanism 149 similar to that in the first embodiment is provided on the upper side (upper part (a)) 147a, and a heat radiating portion 151 is provided on the downstream side of the flow adjusting mechanism 149 (on the right side in the figure). Further, on the surface 151a of the heat dissipation portion 151, a metal projection 1 (made of a material similar to that of the case 147) having a shape in which a substantially rectangular parallelepiped upper surface 153a is inclined and a triangular prism is laid down.
53 is provided. Therefore, the upper surface 15 of the protrusion 153
3a has a slope that is low on the upstream side and high on the downstream side.

B) In this embodiment, the same effect as in the sixth embodiment can be obtained. Further, since the wind comes into direct contact with the slope that is the upper surface 153a of the projection 153 and the flow of the wind can be made smooth, heat dissipation is further improved. (Embodiment 8) Next, the housing structure of the electronic control unit of Embodiment 8 will be described, but the description of the same contents as in Embodiment 1 will be omitted.

A) An electronic control unit according to the eighth embodiment will be described with reference to FIG. Note that FIG. 11A is a perspective view showing the case side of the electronic control device, and FIG. 11B is a plan view of the case side of the electronic control device. As shown in FIG. 11, the electronic control unit 181 of the present embodiment is mounted on the intake module as in the first embodiment, and the housing 183 of the electronic control unit 181 has a resin cover 185 and a cover 185. The case 187 is made of metal.

The surface on the case 187 side (bottom surface: FIG. 11).
A flow adjusting mechanism 189 similar to that of the first embodiment is provided at (upper part (a)) 187a, and a heat radiating portion 191 is provided downstream of the flow adjusting mechanism 189 (on the right side in the figure). Further, three protrusions 193 (made of the same material as the case 187) are arranged in parallel on the surface 191 a of the heat dissipation portion 191.

The projection 193 has a triangular pyramid shape (hence the wedge shape in a plan view), and the apex of the projection 193 in a plan view is arranged on the upstream side of air. b) Also in this embodiment, the same effect as that of the sixth embodiment can be obtained. Further, since the shape of the protrusion 191 provided on the surface 191a of the heat radiating portion 1911 is a substantially triangular pyramid, and the apex thereof is arranged on the upstream side of the air flow, the entire protrusion 191 can efficiently receive wind. , The heat dissipation is high and the cooling effect is even higher. (Embodiment 9) Next, the housing structure of the electronic control unit of Embodiment 9 will be described, but the description of the same contents as in Embodiment 1 will be omitted.

A) An electronic control unit according to the ninth embodiment will be described with reference to FIG. Note that FIG. 12A is a perspective view showing the case side of the electronic control device, and FIG. 12B is a plan view of the case side of the electronic control device. As shown in FIG. 12, the electronic control unit 201 of the present embodiment is mounted on the intake module as in the case of the first embodiment, and the housing 203 of the electronic control unit 201 has a resin cover 205 and a cover 205. The case 207 is made of metal.

The surface on the case 207 side (bottom surface: FIG. 12)
A flow adjusting mechanism 209 similar to that of the first embodiment is provided at (above (a)) 207a, and a heat radiating portion 211 is provided at the downstream side of the flow adjusting mechanism 209 (right side in the figure). Further, three plate members 213 (made of the same material as the case 201) are erected on the surface 211a of the heat dissipation portion 211 in parallel to each other and in parallel to the air flow.

B) Also in this embodiment, the same effect as that of the sixth embodiment can be obtained. Further, since a plurality of plate members 213 are erected in parallel on the surface 211a of the heat radiating unit 211, the plate member 213 as a whole is more likely to receive wind efficiently, has higher heat dissipation, and is more cooled than a flat heat radiating unit. The effect increases.

Needless to say, the present invention is not limited to the above-mentioned embodiments, and can be carried out in various modes without departing from the gist of the present invention. (1) For example, in each of the embodiments described above,
Although the flow adjustment mechanism was provided by fins, tubular parts, cutouts, etc., apart from that, for example, a normal rectangular parallelepiped casing was used, and the bottom of the case was flattened (that is, without special shape). ), The heat dissipation (cooling) may be enhanced by arranging the case so that the bottom of the case is inclined with respect to the flow of air.

In the cooling structure of this electronic control device, for example, when the electronic control device is mounted on the intake module, the outer surface of the housing having the heat radiating portion is obliquely arranged with respect to the flow of air in the air module. It can be realized by (2) For example, in each of the above-described embodiments, the housing is composed of the case and the cover, but other third members may be combined, and the case and the cover may have the same size.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electronic control device according to a first embodiment.

FIG. 2A is an explanatory diagram showing a state before the electronic control device is mounted on the intake module, and FIG. 2B is an explanatory diagram showing a state where the electronic control device is mounted on the intake module.

FIG. 3 is an explanatory diagram schematically showing a state in which an electronic control unit is mounted on an intake module.

FIG. 4A is a perspective view showing a case side of the electronic control device, and FIG. 4B is an explanatory view showing a plane of the case side.

5A is a perspective view showing a case side of the electronic control device of the second embodiment, and FIG. 5B is an explanatory view showing a plane of the case side.

FIG. 6A is a perspective view showing a case side of the electronic control device of the third embodiment, and FIG. 6B is an explanatory view showing a plane of the case side.

FIG. 7 is a perspective view showing a case side of an electronic control device according to a fourth embodiment.

FIG. 8 is a perspective view showing a case side of an electronic control device according to a fifth embodiment.

FIG. 9A is a perspective view showing a case side of an electronic control device according to a sixth embodiment, and FIG. 9B is an explanatory view showing a side surface of the electronic control device.

FIG. 10A is a perspective view showing a case side of an electronic control device according to a seventh embodiment, and FIG. 10B is an explanatory view showing a side surface of the electronic control device.

FIG. 11A is a perspective view showing a case side of the electronic control device of the eighth embodiment, and FIG. 11B is an explanatory view showing a plane of the case side.

FIG. 12A is a perspective view showing a case side of an electronic control device of a ninth embodiment, and FIG. 12B is an explanatory view showing a plane of the case side.

[Explanation of symbols]

1, 51, 71, 81, 101, 121, 141, 18
1, 201 ··· Electronic control unit (ECU) 3 · · Electronic component 5 · · Printed circuit board 7 · · Connector 9, 53, 73, 83, 103, 123, 143, 18
3, 203 ... Casing 11, 55, 75, 85, 105, 125, 145, 1
85, 205 ... covers 13, 57, 77, 87, 107, 127, 147, 1
87, 207 ··· Case 15 · · Intake module 41, 49, 65, 95, 115, 135 · · Air flow path 43, 63, 78, 91, 111, 131, 151, 1
91, 211 ... Heat dissipation parts 45, 59, 79, 89, 109, 129, 149, 1
89, 209 .. Flow adjusting mechanism 47 .. Fin 61 .. Notch portion 93 .. Cylindrical portion 103 .. Box portion 137, 153, 193 .. Projection 213 .. Plate material

Claims (13)

[Claims] 1. A housing structure of an electronic control device, wherein an electronic component including a heating element is housed in a housing, and the heating element is arranged in proximity to or in contact with a heat radiation portion of the housing. A flow adjusting mechanism for guiding the flow of air to adjust the flow velocity of air is provided on the outside, and the flow adjusting mechanism controls the flow velocity of air on the outer surface of the heat radiating portion of the casing from the upstream side of the heat radiating portion. A housing structure for an electronic control device, characterized in that the housing is raised. 2. The electronic control according to claim 1, wherein the cross-sectional area of the flow path from the upstream side of the air to the downstream heat radiation portion side is made smaller from the upstream side to the downstream side. Device housing structure. 3. The flow control mechanism has a plurality of fins provided on the outside of the housing, and the fins have a narrower interval from the upstream side of the air toward the downstream heat radiating section side. The casing structure for the electronic control device according to any one of claims 1 to 3, wherein: 4. The flow control mechanism has a concave cut portion provided on the outside of the housing, and the shape of the cut portion is from the upstream side of the air to the downstream side of the heat radiation portion. The casing structure of the electronic control device according to claim 1 or 2, wherein the width becomes narrower as it goes further. 5. The flow control mechanism has an inclined surface provided on the outside of the housing, and the inclined surface has the heat dissipation portion on the downstream side of the air.
Alternatively, the housing structure of the electronic control device according to item 2. 6. The flow control mechanism has a tubular portion provided outside the casing, and the tubular portion cuts off the flow path from the upstream side to the downstream side of the air. The housing structure of the electronic control device according to claim 1, wherein the area is small. 7. The flow control mechanism includes a wind collecting cover detachably attached to an outer surface of the housing, and the wind collecting cover moves toward the downstream side from the upstream side of the air. The casing structure of the electronic control device according to claim 1 or 2, wherein a cross-sectional area of a flow path formed by the wind collecting cover is reduced. 8. The housing structure for an electronic control device according to claim 1, wherein a protrusion is provided outside the heat dissipation portion. 9. The housing structure for an electronic control device according to claim 8, wherein the protrusion is provided with an inclination in which a downstream side is higher than an upstream side of the air. 10. The electronic control device according to claim 8, wherein the protrusion has a triangular pyramid shape, and the apex of the protrusion in a planar shape is arranged on the upstream side of the air. Case structure. 11. The plate material parallel to the air and the flow is provided upright outside the heat dissipation portion.
The casing structure of the electronic control device according to any one of 1 to 7. 12. A cooling structure for an electronic control device, wherein an electronic component including a heating element is housed in a housing, and the heating element is arranged close to or in contact with a heat radiation portion of the housing, the heat radiation portion having the heat radiation portion. A cooling structure for an electronic control device, wherein an outer surface of the housing is arranged obliquely with respect to a flow of air. 13. The method according to claim 12, wherein, when the electronic control unit is attached to the intake module, the outer surface of the housing having the heat dissipation portion is arranged so as to face the flow path of the intake module. The cooling structure for the electronic control device according to 1.