JP2002353656A - Waterproof structure for air-cooled electronic controller storage box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof structure for air-cooled electronic controller storage box that can cool two electronic controllers and, in addition, can secure a sufficiently good waterproof property. SOLUTION: A ventilating box 50 having a cylindrical air inlet 51 and air outlet 52 of uniform height at both ends of a hollow body having a U-shaped cross section is housed in a storage box 35, in a state where one electronic controller 25 is arranged on the inside of the U shape and another electronic controller 26 is arranged on one external surface side of the U shape. The storage box 35 is vertically divided into a main body 36 and a lid body 37. Annular sealing parts 41 and 42 made of an elastic material are respectively put on the outer peripheries of the air inlet 51 and outlet 52. The sealing parts 41 and 42 put on the outer peripheries of the inlet 51 and 52 are respectively held between grooves 36a, 37a and 36b, 37b formed on the main body 36 and lid body 37 of the box 35. The sealing parts 41 and 42 made of the elastic material are interposed between the horizontal split surfaces of the main body 36 and lid body 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof structure for an air-cooled electronic control unit housing box in which two electronic control units are housed in a storage box together with a ventilation box having an air inlet / outlet. The present invention relates to a waterproof structure of an air-cooled electronic control unit storage box suitable for being applied to an air-cooled storage box for storing a control device.

[0002]

2. Description of the Related Art In a conventional automobile, an electronic control unit (control unit) is usually placed below a dash panel in a room. For this reason, the wire harness must be extended into the room, resulting in high cost and extremely poor workability in terms of maintenance. Therefore, as a remedy, if the electronic control device is installed in the engine room, it is possible to reduce the cost of the wire harness and to improve the workability during maintenance. However, in this case, since the electronic control device is installed in the engine room, it is necessary to house the electronic control device in a storage box having a cooling / dustproof / waterproof structure. As this type of cooling type electronic control unit storage box,
There is an air-cooled electronic control unit storage box 1 as shown in FIG. 11 (see JP-A-9-207691). The air-cooled electronic control unit storage box 1 houses a ventilation box 5 inside a storage box 4 including a storage box main body 2 and a storage box cover 3. Ventilation box 5
Has an air inlet section 6 and an air outlet section 7 to form a ventilation passage 8 for cooling air, and has a rectangular parallelepiped space 9 having an upper opening. 1
Contains 0. In addition, 11 is a wire harness, 12
Is an electrical component. The electronic control unit 10 is cooled by cooling air sent through the ventilation path 8 in the ventilation box 5. Storage box 4
And the air outlet / inlet portions 6 and 7 are annular seal packing 13.
Thereby, the storage box main body 2 and the storage box cover 3 are waterproofed by the seal packing 14 set at the opening edge.

[0003]

As described above, the conventional air-cooled electronic control unit storage box 1 houses one electronic control unit 10 therein. However, for example, when it is necessary to provide two electronic control devices in the storage box, the above-described conventional structure cannot cope with the above.

When two electronic control units are provided in a storage box, for example, a U-shaped unit as shown in FIG.
A ventilation box 23 having an air inlet 21 and an air outlet 22 formed at both ends of a hollow body having a V-shaped cross section is used. One of the electronic control units 2 is provided inside the ventilation box 23 as shown in FIG.
5 is arranged, and the other electronic control device 26 is arranged in the storage box 27 so as to be arranged on the lower outer surface side. The storage box 27 actually needs to be divided into a main body and a lid. In this case, the cooling air entering from the air inlet 21 of the ventilation box 27 flows inside the ventilation box 23 and cools the upper surface of the electronic control device 26 on the lower outer surface side, and then cools the upper surface of the electronic control device 25. . The ventilation box 23 formed by blow molding is excellent in terms of manufacturability, waterproofness, low cost, and the like.

[0005] The air-cooled electronic control unit storage box 28 is
In order to prevent moisture from entering from the outside, the storage box 27 needs to have a waterproof structure. As the waterproof structure, depending on the specific structure of the storage box 27, it is conceivable to insert a packing or apply a resin mold to a portion to be sealed. When packing is used, as shown in FIGS. 9 and 8, the air outlet / inlet portions 21 and 2 of the ventilation box 23 are used.
In the structure in which the upper and lower parts 2 are vertically arranged, as shown in FIG. 10, the division surface between the main body 27a and the lid 27b of the storage box 27 becomes complicated, and the insertion surface (partition surface) of the packing 29 is not parallel. Low waterproof performance. In addition, when a resin mold is applied, the reliability is low because the waterproof performance is affected by an operator. Therefore, the yield is poor and the cost is increased.

The present invention has been made in view of the above circumstances, and when two electronic control units are housed in an air-cooled storage box, a sufficiently good, stable, and highly reliable waterproof performance can be obtained. An object of the present invention is to provide a waterproof structure of an air-cooled electronic control unit storage box which is easy to assemble.

[0007]

The waterproof structure of the air-cooled electronic control unit storage box according to the present invention, which solves the above-mentioned problems, comprises a cylindrical air inlet having a uniform height at both ends of a hollow body having a U-shaped cross section. A ventilation box formed with an air inlet and an air outlet, wherein one electronic control unit is arranged inside the U-shape and another electronic control unit is arranged on one outer surface side of the U-shape. The housing is housed in a storage box horizontally divided into a storage box main body and a storage box cover at the height position of the air inlet section and the air outlet section, and has an annular shape made of an elastic material on the outer circumference of the air inlet section and the air outlet section. By fitting the seal parts, the annular seal part is sandwiched by grooves formed opposite to the storage box body and the storage box lid, respectively, and the storage box main body and the storage box lid are continuous with the grooves. Made of elastic material on the horizontal dividing plane Characterized in that is interposed Lumpur components.

[0008]

FIG. 1 is a sectional view of an air-cooled electronic control unit storage box 30 according to one embodiment of the present invention, and FIG.
B sectional view, FIG. 3 is the air-cooled electronic control unit storage box 30 of FIG.
FIG. 4 is a perspective view of the ventilation box 50 in FIG. The air-cooled electronic control device storage box 30 includes two electronic control devices 25 and 26 and a ventilation box 50 together with the storage box 3.
5 inside.

The ventilation box 50 is provided with the ventilation box 2 shown in FIG.
3, except for an air outlet / inlet portion, but a central ventilation portion 31 located between the two electronic control devices 25 and 26;
A side ventilation section 32 communicating with the central ventilation section 31 and located on a side surface of one of the electronic control devices 25; and an external ventilation section communicating with the side ventilation section and being located on the outer surface of the one electronic control device 25. 33, a hollow body having a U-shaped cross section formed by blow molding of a synthetic resin (the internal space is indicated by 50a), and a cylindrical air inlet 51 and an air outlet 52 having the same height at both ends. It is a structure to have. In this embodiment, the air outlet 52 extends linearly and horizontally from the right side in FIG. 2 at the end of the outer ventilation section 33, and the air inlet 51 extends to the left in FIG. 2 at the end of the central ventilation section 31. At a right angle from (starting part is indicated by 51a)
After that, they are oriented horizontally, and the heights of the two 51 and 52 are aligned (the aligned height levels are indicated by dashed lines s in FIGS. 2 and 4). That is, the height of the air inlet 51 is adjusted to the level of the air outlet 52 which remains horizontal. On the contrary,
The height of the air outlet may be adjusted to the level of the air inlet which remains horizontal, or both may be bent to make the height equal to the intermediate height position.

The storage box 35 is divided into a storage box main body 36 and a storage box cover 37.
Two semicircular grooves 36a and 36b are formed for inserting annular sealing parts 41 and 42, which penetrate the air inlet 51 and the air outlet 52, respectively. The upper edge 36c of the storage box main body 36 has a semicircular groove 36a,
Except for the portion 36b, there is no step and it is horizontal. Storage box lid 3
7, two rectangular grooves 37a and 37b for inserting the two sealing parts 41 and 42 are formed.
The lower edge 37c of the storage box cover 37 is horizontal without any steps except for the rectangular groove 37b.

Each of the sealing parts 41 and 42 is made of an elastic material having a sufficient elasticity, for example, synthetic rubber.
In accordance with the shapes of a, 36b, 37a, and 37b, the lower side has a cylindrical surface and the upper side has a rectangular surface. In addition, the outer peripheral surfaces of the sealing parts 41 and 42 are not limited to the case where the lower side is a cylindrical surface and the upper side is a square surface as in the embodiment, the upper and lower both sides are cylindrical surfaces, the upper and lower sides are both rectangular surfaces, or other. However, the shape of the outer peripheral surface may be such that the sealing action can be effectively obtained. In that case, naturally, the upper and lower groove shapes are matched with the outer peripheral surface shape. In addition, a sealing part 43 made of synthetic rubber is interposed on the division surface between the storage box main body 36 and the storage box cover 27 as shown in an enlarged manner in FIG.
The illustrated sealing component 43 is provided with grooves 3 formed in the edges 36c, 37c of the storage box main body 36 and the storage box cover 37, respectively.
6d and 37d are sheet gaskets,
Various sealing materials such as foamed rubber sponge and foamed urethane can be used as the material.

The parts to which the seal parts 41 and 42 are mounted are not provided with grooves 36a and 36b which are formed in an arc shape as viewed from the front, and grooves 37a and 37b which are formed in a rectangular shape in accordance with the seal parts 41 and 42. Then, as shown in FIG. 7A, the storage box wall portion where the sealing parts 41 and 42 are fitted is thickened, and the sealing parts 41 and 42 are embedded as grooves for fitting the sealing parts 41 and 42. Groove 3
6'a, 36'b and 37'a, 37'b may be formed. 36'a and 36'b are grooves on the side of the storage box main body 36, 37 '
Reference numerals a and 37'b denote grooves on the side of the storage box cover 37. In the illustrated example, seal parts 43 'for the upper and lower divisions are also arranged in the grooves 37'a and 37'b. Further, a protruding portion 37e is provided on the storage box lid 37 side so as to cover the vicinity of the upper end edge 36c of the storage box main body 36. FIG. 7 (b) shows a part of the sealing part 43 on the divided surface of the storage box.
As shown in FIG. 7, the storage box wall near the division surface is thickened so that the storage box main body 36 and the storage box cover 37 have a stepped shape so that the edges of the storage box main body and the storage box cover 37 mesh with each other. It may be configured to be arranged in the groove 37d on the body 37 side.

A procedure for assembling the air-cooled electronic control unit storage box 30 will be described with reference to the above-described drawings. One electronic control device 25 is mounted inside the ventilation box 50 in advance, and the sealing parts 41 and 42 are fitted to the air inlet 51 and the air outlet 52, respectively. The other electronic control unit 26 is attached to the bottom of the storage box main body 36 (see FIG. 5).

Next, the ventilation box 50 equipped with the electronic control unit 25 and the sealing parts 41 and 42 is inserted into the storage box body 3.
6 and mounted on the electronic control device 26 in the form of being mounted thereon, and at the same time, sealing parts 41 and 42 are inserted into the semicircular grooves 36a,
Put on 36b. Finally, the upper edge 36 of the storage box body 36
Place the sealing component 43 (see FIG. 6) in the groove 36d of FIG.
When the storage box cover 37 is put on from above, the cover is closed, and the waterproofing between the sealing parts 41 and 42 and the storage box 35 and the storage box body 3 are performed.
6 and the storage box cover 37 (upper and lower divided surfaces) are simultaneously waterproofed (see FIGS. 1 and 2).

In the above-described air-cooled electronic control unit housing box 30, the structure of the waterproof case by bonding and heat welding is not used, and the cylindrical air inlet 51 and air outlet 52 of the ventilation box 50 are made of synthetic rubber or the like. Are securely sealed by the cylindrical sealing parts 41 and 42 having a sufficient elasticity, and the dividing surface between the storage box main body 36 and the storage box cover 37 is horizontal. , It is possible to secure sufficiently good waterproof performance. Also, horizontal dividing surfaces 36c and 37c between the storage box main body 36 and the storage box lid 37 are provided.
Is set to the same height as the height S of the air outlet / inlet portions 51, 52 having the same height, and two upper and lower grooves 36a, 36 are provided.
b and 37a, 37b, respectively, so that the sealing portions required for the storage box main body 36 and the storage box cover 37 have respective edges (that is, upper edge 36c,
Lower edge 37c and grooves 36a, 37a, 36b, 37
b), a uniform force is applied to all locations, and in this regard, more sufficient waterproof performance can be secured. In addition, since the sealing locations required for the storage box main body 36 and the storage box cover 37 are only the respective edges,
Inexpensive equipment is also required for machinery and the like for manufacturing this. Also,
Since it is not a resin mold, there is no problem that the waterproof performance is affected by the worker and the yield is deteriorated, and the cost can be reduced. The air inlet 51 and the air outlet 5
The sealing work of the part 2 is only required to fit the sealing parts 41 and 42, put them on the semicircular grooves 36a and 36b of the storage box main body 36, cover the storage box cover 37, and sandwich it. , Stable waterproof performance can be realized.

The above-mentioned electronic control units 25, 26,
The procedure or procedure for assembling the ventilation box 50, the sealing parts 41, 42, 43, the storage box body 36, and the storage box cover 37 is not limited to the above-described embodiment, and can be appropriately changed.

An air inlet 51 provided in the ventilation box 50
The air outlet 52 and the air outlet 52 are in the same direction (left and right in FIG. 1) in the embodiment, but have different directions, for example, one is in a direction perpendicular to the paper surface in FIG. 1 (right and left in FIG. 2). You can also. Further, the present invention is not limited to the electronic control device of an automobile, and can be applied to various cases where two electronic control devices need to be accommodated in an air-cooled storage box having a waterproof structure.

[0018]

According to the present invention, two electronic control units are arranged inside and outside the ventilation box which is a hollow body having a U-shaped cross section, respectively, and housed in the storage box. Therefore, the two electronic control units can be effectively cooled.

The cylindrical air inlet 51 and air outlet 52 of the ventilation box are securely sealed with cylindrical sealing parts 41 and 42 having sufficient elasticity, such as synthetic rubber. Since the divided surfaces 36c and 37c of the main body 36 and the storage box cover 37 are horizontal and the horizontal divided surfaces are sealed by the seal parts 43, sufficiently good waterproof performance can be secured. Further, the horizontal dividing surfaces 36c and 37c of the storage box main body 36 and the storage box cover 37 are formed so that the air outlets with the same height are provided.
Since the height is set to be the same as the height of the inlet portions 51 and 52b and is continuous with the upper and lower grooves 36a and 36b and 37a and 37b, the sealing locations required for the groove storage box body 36 and the storage box cover 37 are required. Are only the respective edges, and a uniform force is applied to all portions, and in this respect, more sufficient waterproof performance can be secured. In addition, since only the edges of the storage box main body 36 and the storage box cover 37 are required to be sealed, the machinery and the like for manufacturing the same need only be inexpensive.

Further, since it is not a resin mold, there is no problem that the waterproof performance is affected by the operator and the yield is deteriorated, and the cost can be reduced. The air inlet 51
The sealing operation of the air outlet portion 52 is performed by fitting the sealing parts 41 and 42 into the semicircular groove 3 of the storage box main body 36.
It is only necessary to put the storage box cover 37 on the 6a, 36b and sandwich it, and the assembly is simple and stable waterproof performance can be realized. Further, the ventilation box, which is a hollow body having a U-shaped cross section, can be formed very efficiently by blow molding, and in this regard, cost reduction can be easily realized.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an air-cooled electronic control unit storage box employing a waterproof structure according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is an exploded perspective view of the air-cooled electronic control device storage box of FIG. 1;

FIG. 4 is a perspective view of the ventilation box in FIG.

FIG. 5 is a diagram illustrating a procedure for assembling the air-cooled electronic control device storage box.

FIG. 6 is an enlarged view of a portion A in FIG.

FIGS. 7A and 7B are diagrams showing another embodiment of the mounting structure of each of the sealing parts 41,, and 43, wherein FIG. It is.

FIG. 8 is a sectional view showing an example of a structure that can be considered as an air-cooled electronic control device storage box that cools two electronic control devices.

9 is a perspective view of a ventilation box in the air-cooled electronic control device storage box of FIG. 8;

FIG. 10 is a diagram for explaining an example of a manner of dividing the storage box, which can be considered when the storage box of the air-cooled electronic control device of FIG. 8 is specifically manufactured.

FIG. 11 is a sectional view of a conventional air-cooled electronic control unit storage box.

[Explanation of symbols]

25, 26 Electronic control unit 30 Air-cooled electronic control unit storage box 31 Central ventilation unit 32 Side ventilation unit 33 Outer surface ventilation unit 35 Storage box 36 Storage box body 36a, 36b Semicircular groove 36'a, 36'b Groove 36c Upper edge 36d, 37d Groove 37 Storage box lid 37a, 37b Rectangular groove 37'a, 37'b Groove 37c Lower edge 41 Sealing part (air inlet side) 42 Sealing part (air outlet side) 43 Sealing part (storage) Horizontal division surface between the box body and the storage box cover) 50 Ventilation box 51 Air inlet 51a Start-up part 52 Air outlet S Horizontal division surface

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H05K 7/20 H05K 7/20 G F-term (Reference) 3L044 BA06 DA01 4E360 AB09 AB12 AB20 AB34 BA08 BC06 BD05 EA03 EA18 ED03 ED17 ED23 ED27 GA24 GA29 GB93 GB94 5E322 BA01 BA03 BA05 BC01 5G361 AA06 AB09 AC02 AC04 AC13 AE01

Claims (1)

[Claims] 1. A ventilating box having cylindrical air inlets and air outlets having the same height at both ends of a hollow body having a U-shaped cross section, and one electronic control device inside the U-shape. In a mode in which another electronic control device is disposed on one outer surface side of the U-shape, the storage device is horizontally divided into a storage box main body and a storage box cover at a height position of the air inlet portion and the air outlet portion. In addition, the sealing member is housed in the storage box, and an annular sealing part made of an elastic material is fitted around the outer circumference of the air inlet and the air outlet, and the annular sealing part is fitted to the storage box main body and the storage box lid, respectively. An air-cooled electronic device, wherein a sealing part made of an elastic material is interposed on a horizontal dividing surface between the storage box main body and the storage box cover, which is sandwiched by the grooves formed to face each other and continuous with the grooves. Waterproof structure of control box.