JP2861945B2 - Heat dissipation structure of sealed device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiating structure for a closed type device used outdoors.

[0002]

2. Description of the Related Art Conventionally, a heat-dissipating structure of a hermetically sealed device used outdoors employs a heat-pipe type cooler structure in which a heat collecting fin is provided inside a housing and a heat pipe having a heat fin is provided outside the housing. It had been. FIG. 3A is a front view of a conventional heat dissipation structure, and FIG.
FIG. 4 is a sectional view taken along the line III-III, and FIG.
It is sectional drawing along the line. In this example, three heat pipes 5 having different operating temperatures are provided at the upper part of the housing 1. The heat collecting fins 4 are provided inside the housing of the heat pipe 5.
A radiation fin 4a is attached to the outside of the housing. The heat pipe 5 has a heat collecting fin 4, a heat radiating fin 4a,
A heat pipe assembly is integrally formed with the heat insulating material 1a and the mounting plate 7, and this assembly is inserted into a hole corresponding to the shape of the heat insulating material 1a of the assembly provided at the upper part of the housing, and the mounting plate 7 is mounted. It is screwed to the body 1 and further fixed, for example, by filling the gaps between the holes with a suitable resin. Such a closed cabinet heat dissipation structure for a wireless device has been used.

[0003]

In such a prior art, since the heat pipe is provided so as to extend over the inside and outside of the housing, a considerable space is required, so that the external dimensions of the sealed device become large. There was a problem. In addition, expensive heat pipe type coolers are used,
In addition, there are many components of the housing and the number of assembly steps is increased, so that the cost is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the outer shape of a device without using a heat pipe cooler and without requiring a mounting space, to manufacture the device easily, and to reduce the number of parts in an inexpensive outdoor environment. An object of the present invention is to provide a heat radiation structure of a device to be used.

[0005]

The heat radiation structure of the present invention maintains waterproofness by combining an upper housing and a lower housing.
In the sealed device, the upper housing and the lower housing are each formed with a plurality of through holes and provided with a large number of fine holes.
A sheet having water resistance and air permeability is mounted on each of the upper housing and the lower housing so as to cover all of the through holes.

[0006] The through-hole has a fixed size, can be provided in each of the upper housing and the lower housing at a fixed interval, and the sheet uses a mesh having a large number of fine meshes. be able to.

[0007]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a heat radiation structure of a sealed device of the present invention, wherein (a) is a plan view and (b).
Is a side view. 2A is a view showing a partial cross section of FIG. 1B, and FIG. 2B is a view showing details of a sheet.

As shown in FIGS. 1 (a) and 1 (b), the heat dissipation structure comprises an upper housing 11, a lower housing 12, and a sheet 13 for heat dissipation.
The upper housing 11 is provided with a plurality of through holes 14 having a certain size d at a certain interval D for releasing internal heat.

The lower housing 12 has the same structure as the upper housing 11 as shown in FIG.
4 are provided. The sheet 13 is made of a thin material having water resistance and air permeability. As shown in FIG. 2 (b), a large number of fine holes 13a are formed and heat inside is released.
It has a structure that blocks water and dust that enters from outside. The size of the pores is preferably between 1 and 10 microns to prevent the penetration of water droplets (normal rain size of about 2000 microns) and to allow water vapor (about 0.001 microns) to dissipate freely. ing. And sheet 13
, An adhesive tape 13b for attaching the sheet 13 to the inner surfaces of the upper housing 11 and the lower housing 12 is provided integrally with the entire circumference with a constant width w so as not to cover the through holes 14. I have. In assembling, the sheet 13 is attached to the inner surface of the top plate of the upper housing 11 with an adhesive tape 13b so as to cover all the through holes 14. The lower housing 12 has the same structure. Further, by combining the upper housing 11 and the lower housing 12, a sealed device can be realized, intrusion of water and dust can be prevented, and internal heat can be released.

As described above, since a plurality of through holes are provided in the top plate and the bottom plate of the upper and lower housings, heat generated inside can be released to the outside. Moreover, since the sheet 13 having a large number of fine holes 13a is attached to the inner surfaces of the upper and lower housings so as to cover all of the through holes 14, the waterproofness required for the outdoor device can be obtained and the dust can be obtained. Can be prevented, but since the sheet has air permeability,
The heat radiation effect inside the housing can be maintained.

[0011]

According to the present invention, a through hole is formed in the upper and lower housings, and a sheet having a large number of fine holes is adhered to the inner surface of the housing, whereby a heat radiation effect can be obtained without using a heat pipe. Therefore, there is an effect that it is possible to provide a heat-dissipating structure which can be reduced in size and simplification of the apparatus and the number of parts can be minimized, and which can be inexpensively assembled easily.

[Brief description of the drawings]

FIG. 1A is a plan view showing an embodiment of a heat dissipation structure according to the present invention. (B) The side view of one embodiment of the heat dissipation structure of the present invention.

FIG. 2 (a) is a diagram showing a partial cross section taken along line AA of FIG. 1 (a). (B) Partial plan view showing a sheet of the heat dissipation structure of the present invention.

FIG. 3A is a front sectional view of a conventional heat dissipation structure. FIG. 3B is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line II-II of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 housing 1a heat insulating material 4 heat collecting fin 4a heat radiating fin 5 heat pipe 11 upper housing 12 lower housing 13 sheet 13a micro hole 13b adhesive tape 14 through hole D constant interval d size w constant width

Claims (3)

(57) [Claims] 1. A heat dissipating structure for a hermetically sealed device that maintains waterproofness by combining an upper housing and a lower housing, wherein a plurality of through holes are formed in each of the upper housing and the lower housing. Water resistant and breathable with numerous pores
A heat dissipating structure for a hermetically sealed device, wherein sheets are mounted on the upper housing and the lower housing so as to cover all of the through holes. 2. The heat radiating structure for a sealed device according to claim 1, wherein each of the through holes has a fixed size and is formed at fixed intervals. 3. The heat radiating structure of a closed type device according to claim 1, wherein the sheet comprises a mesh having a large number of fine meshes.