JP2001147062A - Heat radiating structure of electrical heating element accommodation case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the heat radiating structure of an electrical heating element accommodation case, which can keep the temperature of the electrical heating element or the like which is accommodated inside at a prescribed value, can achieve a simple structure and inexpensive execution, at the same time, does not require maintenance, and prevents the reduction in the functions and service life of the accommodated electrical heating element, without having to fit special cooling means. SOLUTION: Hot air from an electrical heating element 17, accommodated in an inner box 2, is absorbed effectively by an inner-surface-side projection piece 11 with large surface area being formed in the inner box 2 and a black body surface 19, is transferred to an outer-surface side projection piece 12 with a large surface area exposed in a duct 13, and rises in the duct 13 for radiating from an exhaust vent 24 of a top plate 4, thus continuously keeping the electrical heating element 17 at a prescribed temperature that will not affect the functions.

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 heat-generating body housing that can always maintain the temperature of a heat-generating body housed therein at a predetermined value without using special cooling means inside.

[0002]

2. Description of the Related Art A housing for accommodating a heating element inside or outside of a house is widely used. The heating element rises over time due to the influence of the outside air temperature in addition to the heat generated from itself,
The heat is high, which causes a problem that the function of the heating element and its life are shortened. For this reason, it is necessary to cool the inside of the housing for housing the heating element by some cooling means and to maintain the temperature of the heating element at a predetermined value.

FIG. 11 shows an example of a heat radiation structure of a housing generally used in the related art. An outlet 3 is provided above the housing 33.
4 and fans 35 and 36 engaged with the outlet 34
The heat inside the housing 33 is radiated by a heat pipe or a heat exchanger 37 to prevent the temperature inside the housing 33 from rising. Further, a circulation fan 31 for maintaining uniformity of the internal temperature is arranged in the housing 33.

[0004]

As described above, the housing 3
In order to maintain the internal temperature in the unit 3 at a predetermined value, the fans 35 and 36, the heat pipe, the heat exchanger 37, and the like are required as described above, and there is a problem that the equipment cost increases. In addition, each of the cooling means requires maintenance, and maintenance costs are incurred. In each case, the inside of the housing 33 comes into contact with the outside air side, and the housing 33 is provided with an intake port 39 and an exhaust port 38, so that the inside of the housing 33 is internally provided. There is a problem that dust and the like enter and accumulate. Also,
As shown in FIG. 11, the exhaust port 38 and the intake port 39 are of a loose type, and this type protrudes from the surface, so that the cleaning property and the appearance are deteriorated. In addition, these devices have a problem that the exhaust area is small and the heat radiation is inadequate.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a heat radiation structure for a heating element housing that is simple in structure, can be implemented at low cost, is maintenance-free, and does not require maintenance costs. The purpose is to:

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a substantially sealed inner box which houses a heating element and partially forms an entrance of the heating element, And an outer box having a door which engages with the doorway and which is disposed through a duct which communicates with the upper and lower sides of the outer box, and a shield which is provided around the outer box via an appropriate gap. A heat dissipation structure of a triple-structure housing composed of a plate, wherein the housing constitutes a heat dissipation structure of a heating element housing housing covered with a canopy having an exhaust port communicating with the duct above the housing.

[0007] Further, a surface area increasing portion for increasing the surface area of the wall surface is formed inside and outside of the wall surface of the inner box in contact with the duct.

Further, the surface area increasing portion comprises a projecting piece or a projecting portion formed inwardly and outwardly from the wall surface of the inner box, and the projecting piece or the projecting portion projecting outwardly is It is characterized in that it is arranged to be exposed inside the duct.

[0009] The inner surface of the inner box and the inner surface of the outer box are black-treated.

[0010] The temperature of the air in the inner box containing the heating element rises with time, but this hot air is radiated to the duct side through a surface area increasing portion formed in the inner box. The hot air in the duct rises due to the chimney effect and is introduced into the canopy.
The canopy has an exhaust port, and hot air is radiated outward from the exhaust port. Also, the hot air in the inner box, which is blackened on the inner surface of the inner box or the like, is absorbed by the inner surface side, and is efficiently and largely radiated to the duct side by the surface area increasing portion of the inner box.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat radiating structure of a heating element housing according to the present invention will be described below in detail with reference to the drawings. FIG.
3 to 3 show a heating element housing 1 having a heat dissipation structure according to the present invention.
FIG. The heating element housing 1 has a triple structure of an inner box 2 having a cross-sectional shape shown in FIG. In addition, a canopy 4 that covers 2a is disposed above the outer box 3. In addition, inner box 2
The outer box 3 is supported by the base 5.

First, the detailed structure of the inner box 2 and the outer box 3 will be described with reference to FIG. FIG. 4 shows a cross-sectional shape of the inner box 2 and the outer box 3 and the shielding plate 6. Inner box 2 has side plate 7,
7 and a substantially U-shaped frame surrounded by a vertical plate 8 provided therebetween, and is fixed to the outer box 3 side by a support plate 9 fixed in the outer box 3. A surface area increasing portion 10 is formed on the side plates 7 and 7 and the vertical plate 8. In this embodiment, the surface area increasing portion 10 is formed separately from the side plate 7 and the vertical plate 8 but may be formed integrally.

The surface area increasing portion 10 is formed so as to protrude from the inner surface of the side plate 7 or the vertical plate 8 and protrudes inward.
And an outer surface-side protruding piece 12 formed to protrude outward on the outer surface of the second member. The inner and outer protruding pieces 11, 12 are formed to extend along the direction perpendicular to the plane of FIG. 4 and have a length substantially equal to the length of the inner box 2 or the outer box. Become. Inner surface projecting piece 11 and outer surface projecting piece 12
Has a U-shaped cross section, and the bottom surface side is fixed to the side plate 7 or the vertical plate 8. The side plate 7 is formed by the inner projecting piece 11 and the outer projecting piece 12 having the U-shaped cross section.
And the surface area of the vertical plate 8 becomes extremely large.

The outer box 3 is formed in a cylindrical shape surrounding the inner box 2, and a duct 13 is provided between the outer surface of the inner box 2 and the inner surface of the outer box 3.
Is formed. This duct 13 is formed penetrating vertically. The main body side 3a of the outer case 3 is made of a U-shaped cross section, and a door 14 is attached to the opening of the main body side 3a so as to be openable and closable. For example, a conductive seal member 15 is interposed therebetween. FIG. 6 shows the upper surface of the outer box 3 with the canopy 5 covering the upper part of the outer box 3 and the like removed, and the upper surface of the inner box 2 is covered by the upper plate 3b. A duct portion 13a communicating with the duct 13 is formed in the opening 3b. Further, as shown in FIG. 10, the inner box 2 and the lower surface are closed by a lower plate 32. Abbreviation) is formed. In addition, inner box 2 and outer box 3
A vent hole 18 is formed in the base table 5 that supports the bottom plate, and ventilation is performed below the lower surface plate 32.

As shown in FIG. 4, the inner surfaces of the side plates 7 and the vertical plates 8 of the inner box 2 and the inner surfaces of the inner side projecting pieces 11 and the support plate 9 of the outer box 3 and the inner surface of the door 14 are fixed to the inner surfaces. Is formed. The black body surface 19 is, for example, one to which a black paint is adhered, but is not limited to this. The black body surface 19 is for improving the heat absorption of the internal heat in the inner box 2.

As shown in FIGS. 1 to 6, a shielding plate 6 is provided through a space around the outer case 3. Shield plate 6
Is made of a plate-like member having substantially the same area as the outer box 3,
0 supports the outer box 3 side. The shape of the material is not specified, but any material may be used as long as it has a good reflectance to the outside air and has appropriate strength.

As shown in FIG. 1, FIG. 2, FIG. 3, FIG. 5, etc., the canopy 4 is made of a roof covering the upper surface of the outer box 3, and has side plates 20, 20, a ceiling plate 21, an inclined plate 22. , A hollow lid surrounded by a flat plate 23 and the like. Each of the plates 20, 21, 22, 23 of the canopy 4 has a plurality of exhaust ports 2.
4 are formed. The cavity 25 (FIG. 10) inside the canopy 4 communicates with the duct port 13a.

Next, the structure of the exhaust port 24 will be described with reference to FIGS. The exhaust port 24 includes a number of concave grooves 26 arranged adjacent to each other, and does not project from the surface of the canopy 4 unlike the conventional louver-type exhaust port 38. The concave groove body 26 is composed of a dish 26a fixed to the back surface of the canopy 4,
The plate body 26a is disposed so as to face the opening 27 formed on the canopy 4 side. The side window 2 is provided on both sides of the plate 26a.
8 are formed and communicate with the opening 27. As described above, the air (hot air) can freely enter and exit as indicated by the arrow, and the opening 2
7 and the side window 28 have a larger area than the louver type exhaust port 38, so that the heat radiation efficiency can be improved. The bottom plate 29 of the plate 26a functions to prevent dust from entering the canopy 4.

Next, the action of preventing heat generation by the heat generating element housing 1 of the present invention will be described. The temperature of the heating element 17 housed in the inner box 2 is increased by the heat generated by its own operation and the heating by solar heat from the outside. However, the heating element 1
The heat of 7 is first radiated from the wall surface of the inner box 2, but the heat radiation rate becomes extremely higher than the case of the wall surface of the flat body due to the surface area increasing portion 10 formed on this wall surface. Also,
The degree of heat absorption is improved by the black treatment, and the degree of heat radiation from the wall surface is increased. Further, this heat is communicated upward and downward through a duct having a tunnel effect, and is radiated from the exhaust port 24 of the canopy 4 to the atmosphere.

On the other hand, the solar heat is blocked by the shielding plate 6 and the heat conduction to the housing side is reduced due to the formation of the gap, thereby suppressing the heat generation of the inner box 2. As described above, the temperature of the heating element 17 in the inner box 2 rises only a small amount with respect to the outside air temperature, and does not reach a temperature that affects the function of the heating element.

The present invention is characterized in that no special cooling means is provided inside. However, a circulation fan 31 may be provided as shown in FIG. Thereby, the heat radiation effect can be further improved.

Except for the circulation fan 31, the heating element housing 1 of the present invention comprises the inner box 2, the outer box 3, the canopy 4, the surface area increasing portion 10 provided in the inner box 2, the duct 13, and the like. It consists of a structure that does not use any special cooling means. Therefore, it is formed at low cost. Further, once the heating element 17 is stored, maintenance is basically unnecessary, and maintenance is free, so that maintenance cost is unnecessary. When it is desired to further lower the temperature of the heating element 17 or when it is necessary to store a low-temperature element in place of the heating element 17, a cooling means such as a Peltier module can be easily provided on the canopy 4 side. . Of course, a cooling means conventionally used can be provided. In addition, since the heat radiation structure of the heat generating element housing of the present invention forms a multiple (triple) heat radiation part, the heat radiation efficiency can be greatly improved as compared with the conventional one.

[0023]

According to the heat radiating structure of the heat generating element housing of the present invention, the temperature of the heat generating element and the like can be maintained at a predetermined value without using any special cooling means, and can be implemented at low cost. In addition, maintenance is free, and the function and life of the heat generating element stored without the intrusion of dust or the like does not decrease.

[Brief description of the drawings]

FIG. 1 is an external view of a heat generator housing having a heat dissipation structure according to the present invention.

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is an enlarged cross-sectional view showing a detailed structure of an inner box, an outer box, and the like of the heating element housing.

FIG. 5 is a top view of FIG. 1;

FIG. 6 is a top view showing the top structure of the heating element housing with the canopy of FIG. 1 removed;

FIG. 7 is a partial plan view of an exhaust port provided in a canopy.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

FIG. 9 is a sectional view taken along line BB of FIG. 7;

FIG. 10 is a schematic view for explaining the operation of the heat radiation structure of the heat generator housing of the present invention.

FIG. 11 is a schematic view showing an example of a conventional heat dissipation structure of a housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating element storage housing 2 Inner box 3 Outer box 3a Main body side 4 Canopy 5 Base stand 6 Shielding plate 7 Side plate 8 Vertical plate 9 Support plate 10 Surface area increasing part 11 Inner side projecting piece 12 Outer side projecting piece 13 Duct 13a Duct part Reference Signs List 14 Door 15 Seal member 16 Circulating flow 17 Heating element 18 Vent 19 Black body surface 20 Side plate 21 Ceiling plate 22 Inclined plate 23 Flat plate 24 Exhaust port 25 Cavity 26 Groove 26a Plate 27 Opening 28 Side window 29 Bottom plate 30 Stay 31 Circulation fan 32 Lower plate

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[Procedure amendment]

[Submission date] May 9, 2000 (200.5.9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a substantially sealed inner box which houses a heating element and partially forms an entrance of the heating element, And a single or multiple outer box having a door which engages with the doorway and which is disposed through a duct which vertically communicates therewith, and which is disposed around the outer box via an appropriate gap. A heat dissipating structure for a triple or multi-layered housing composed of a single or multiple shielding plates provided, wherein the housing is covered with a canopy having an exhaust port communicating with the duct above the housing. Construct a heat dissipation structure for the housing.

Claims (4)

[Claims] 1. A substantially sealed inner box that houses a heating element and forms an entrance and exit of the heating element in a part of the inner box, and is disposed via a duct that covers the inner box and communicates vertically around the inner box. A heat dissipating structure of a triple-structure housing comprising an outer box provided with a door engaged with the entrance and a shielding plate disposed around the outer box via an appropriate gap. A heat dissipating structure for a heat generating element housing, wherein the housing is covered with a canopy having an exhaust port communicating with the duct above the housing. 2. The heating element storage case according to claim 1, wherein a surface area increasing portion that increases a surface area of the wall surface is formed inside and outside of a wall surface of the inner box in contact with the duct. Heat dissipation structure. 3. The protruding piece or protruding part, wherein the surface area increasing part protrudes inward and outward from the wall surface of the inner box, and the protruding piece or protruding part protruding outward is The heat radiating structure of the heating element housing according to claim 2, wherein the heat radiating structure is provided so as to be exposed in the duct. 4. The heat radiating structure for a heat generating element housing according to claim 1, wherein the inner surfaces of the inner box and the outer box are subjected to black processing.