JP3409196B2 - Heat insulation structure in heat treatment equipment - 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 insulating structure in a heat treatment apparatus.

[0002]

2. Description of the Related Art Conventionally, the wall of the main body of a heat treatment apparatus is made of a heat insulating material such as glass wool or synthetic resin foam, which is expected to have a heat insulating effect on the heat treatment apparatus. Was there.

However, generally, the temperature inside the heat treatment apparatus often exceeds 200 ° C., and a sufficient heat insulating effect cannot be expected only by constructing the wall portion with the above-mentioned heat insulating material, so that the working environment is It often caused deterioration.

Although a method of increasing the thickness of the heat insulating material to improve the heat insulating effect is conceivable, it is inevitable that the size of the device will be increased, and such an effect cannot be obtained.

Therefore, the following proposal has been made (see Japanese Utility Model Publication No. 6-33344).

That is, as shown in FIG. 4, the wall portion (100) of the apparatus main body (A ') has a double heat insulating panel (101) (10) inside and outside.
2) and a space layer (103) was provided between the heat insulation panels (101) and (102), which was expected to have a heat insulating effect.

By constructing the heat insulating structure in the heat treatment apparatus (A ') as described above, the heat insulating effect is certainly improved. However, this proposal is also not satisfactory because it does not achieve a sufficient heat insulating effect. The reason why a sufficient heat insulating effect cannot be obtained even with the heat insulating structure having the above configuration is as follows.

As is well known, there are three heat transfer methods: "convection", "radiation" and "conduction". In the above heat insulating structure, since the space layer (103) is provided in the middle, even if the "conduction" of heat from the inner panel (101) to the outer panel (102) is small, there is "convection". The "radiation" can occur sufficiently, which causes the heat from the inner panel (101) to be transmitted to the outer panel (102), that is, the reason why a sufficient heat insulating effect cannot be expected.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a heat insulating structure having an excellent heat insulating effect in a heat treatment apparatus.

[0010]

A heat insulating structure in a heat treatment apparatus according to claim 1, comprising an inner panel layer and an outer panel layer opposed to each other, and a space layer which can be communicated with the outside between the inner and outer panel layers. a heat insulating structure in the heat treatment apparatus equipped with the space layer is divided into a plurality of heat dissipating layer by one or a plurality of plate-like bodies facing the panel layer of the inner and outer, the one or the plurality The plate is in front
Front by a support rod extending from the outer panel layer to the space layer
It is held in the storage space layer .

According to a second aspect of the present invention, there is provided the heat insulating structure according to the first aspect, further comprising intake means for sucking air in the space layer.

[0012]

In the heat insulating structure according to the first aspect, as described above, the space layer between the inner and outer panel layers is divided into a plurality of heat radiating layers by the plate-like body, and in terms of space,
“Convection” is no longer likely to occur, and heat transferred to the inner panel layer can be minimized from being transferred to the plate-like body by “convection”.

Further, the heat dissipation layer formed by subdividing the space layer functions as a chimney, and a so-called "chimney effect (air drift effect)" is exhibited. That is, in the heat dissipation layer, an air flow that flows upward occurs, heat from the inner panel layer is obstructed by the air flow described above, and is less likely to be transmitted to the plate-shaped body,
Heat transfer due to "radiation" is suppressed.

Of course, as described above, since there is a space layer between the inner and outer panel layers, the heat transfer by "conduction" is extremely small.

Even so, a considerable amount of heat is transferred to the plate-shaped body, but this heat is suppressed by the "convection" and "radiation" due to the small division of the space layer. The heat transfer to the panel layer (the second plate-shaped body when a plurality of plate-shaped bodies is provided) is further reduced.

With these, it is possible to dramatically improve the heat insulating property and to provide a heat insulating structure having an excellent heat insulating effect.

In the heat insulating structure according to the second aspect, since the air intake means for sucking the air in the space layer is further provided, "convection" is less likely to occur, and the above "chimney" is generated. The effect (air drift effect) "can be promoted and the heat insulation can be improved more effectively.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat insulating structure in a heat treatment apparatus of the present invention will be described with reference to the drawings, but the present invention is not limited to this.

In this embodiment, the heat insulating structure of the front wall portion having the opening / closing door at the center is shown. However, such a heat insulating structure is used in other portions of the heat treatment apparatus, such as the ceiling wall portion,
It is also used for the bottom wall.

1 to 3, reference numeral (10) indicates a front wall portion of the heat treatment apparatus (A). The front wall portion (10) is composed of an opening / closing door (12) provided in the central portion and a frame portion (14) in a square shape in front view, which is located outside thereof. The opening / closing door (12) can be opened and closed by operating the handles (16) attached at three positions. A hinge (18) attached below the handle (16) supports rotation of the open / close door (12) when opening / closing.

The internal structure of the front wall portion (10) described above is clearly shown in FIG. The innermost side (right side in FIG. 2) of both the open / close door (12) and the frame portion (14) is formed of the inner panel layer (20) (thickness is, for example, about 50 mm). The inner panel layer (20) is a frame body (20a) made of an aluminum plate filled with glass wool (20b) as a heat insulating material.

On the outer side, the outer panel layer (22) (thickness of, for example, 1 is formed so as to face the inner panel layer (20) in both the door (12) and the frame (14).
5 mm). Inner panel layer (2
A space layer (24) between the outer panel layer (22) and the outer panel layer (22)
(The thickness is, for example, about 15 mm). The outer panel layer (22) is made of a heat insulating plate having a heat insulating property, and an aluminum foil (2
6) is attached.

The inner and outer panel layers (20, 22) are connected by a plate-like connecting body (28) as shown in FIG. That is, in the opening / closing door (12), the outer peripheral surface (virtual outer peripheral surface) is connected by the connecting body (28) at four surfaces, and in the frame portion (14), the outer peripheral surface (virtual outer peripheral surface). 4 surfaces which are the inner peripheral surface (virtual inner peripheral surface) and the 4 surfaces (4 surfaces in the virtual facing surface of the door (12))
Are connected by a connecting body (28) on a total of eight surfaces.

The space layer (2 in the above-mentioned connected body (28)
As is clearly shown in FIG. 3, air circulation holes (30) are provided at predetermined intervals at a position corresponding to 4). The air circulation hole (30) provided on the surface of the frame (14) facing the opening / closing door (12) is located at a position corresponding to the air circulation hole (30) provided in the opening / closing door (12). They are provided respectively, and both can communicate with each other. As a result, the space layer (24) inside the open / close door (12)
Air can be communicated with the space layer (24) inside the frame (14),
As a result, air can be communicated with the outside of the device (A).

The space layer (24) is a metal plate (32) which is relatively excellent in heat conductivity, such as two aluminum plates, copper plates or iron plates which face the above-mentioned inner and outer panel layers (20) and (22) respectively. ) Equally divides into three heat dissipation layers (34). The two metal plates (32) described above are attached to the outer panel layer (2
It is held by a support rod (36) extending from 2) to the space layer (24).

The thickness of each heat dissipation layer (34) is not particularly limited, but turbulence is unlikely to occur inside due to the heat from the inner panel layer (20), or even if it occurs, it is of a very small thickness. It is preferable that there be 15 mm.
It is preferably within the range, more preferably from 4 to 10 mm.

Reference numeral (38) is an intake duct. The intake port (38a) of the intake duct (38) is applied to the upper surface of the frame portion (14). As a result, air (air present in the space layer (24)) inside the opening / closing door (12) and the frame portion (14) is driven through the air circulation hole (30) by driving the intake fan (not shown). Is drawn toward the intake duct (38) and sucked. Along with this, air enters from the outside into the inside through the air circulation holes (30) provided on the lower surface and the left and right side surfaces on the outer periphery of the frame (14). That is, the air (in the space layer (24)) inside the front wall portion (10) of the heat treatment apparatus (A) is replaced by the drive of the above-mentioned intake fan.

In the heat treatment apparatus (A) having the above-described heat insulating structure, the inner and outer panel layers (2
The space layer (24) between (0) and (22) is divided into a plurality of heat dissipation layers (34) by the metal plate (32), so that "convection" is less likely to occur in space, and the inner panel layer is formed. It is possible to minimize that the heat reaching the (20) is transferred to the metal plate (32) by “convection”.

Further, the heat dissipation layer (34) obtained by subdividing the space layer (24) functions as a chimney, and a so-called "chimney effect (air drift effect)" is produced. That is, in the heat dissipation layer (34), an air flow that flows upward occurs, heat from the inner panel layer (20) is hindered by the air flow described above and is less likely to be transmitted to the metal plate (32), and "radiation" is generated. Heat transfer is suppressed.

Of course, as described above, since the space layer (24) exists between the inner and outer panel layers (20) (22),
The heat transfer by "conduction" is also extremely small.

Even so, a considerable amount of heat is transferred to the metal plate (32), but this heat is suppressed by "convection" and "radiation" due to the space layer (24) being divided into small sections. As a result, the heat transfer to the second metal plate (32) and further to the outer panel layer (22) is further reduced.

With these, it is possible to dramatically improve the heat insulating property and to provide a heat insulating structure having an excellent heat insulating effect.

Furthermore, since a means for sucking the air in the space layer (24) is provided, and the air in the space layer (24) is replaced, "convection" is less likely to occur and the above-mentioned "chimney" is generated. The effect (air drift effect) "can be promoted and the heat insulation can be improved more effectively.

In this embodiment, the space layer (24) is divided into the three heat dissipation layers (34) by using the two metal plates (32), but the present invention is not limited to this. It is also possible to divide the space layer (24) by using a metal plate (32) or a larger number (4, 5 ...) Of metal plates (32). Also, of course, one metal plate (32) can be used to create two space layers (24).
A structure in which the heat dissipation layer (34) is divided is also within the scope of the present invention.

Further, although the intake duct (38) is applied only to the upper surface of the frame portion (14), it is not limited to this, and in addition to the upper surface, the intake duct may be provided on the lower surface or on either one of the left and right side surfaces. You can apply (38).

Furthermore, although the air circulation holes (30) are provided on all four sides of the outer periphery of the frame (14), the invention is not limited to this, and the air circulation holes (30) are provided on at least two sides. It is also possible to close the other two surfaces.

[0037]

According to the present invention, it is possible to provide a heat insulating structure of a heat treatment apparatus having an excellent heat insulating effect.

[Brief description of drawings]

FIG. 1 is a front view of a heat treatment apparatus showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in the previous figure.

FIG. 3 is a partial perspective view of a front wall portion.

FIG. 4 is a sectional view showing a heat insulating structure in a conventional heat treatment apparatus.

[Explanation of symbols]

A: Heat treatment equipment 20 …… Inner panel layer 22 ... Outer panel layer 24 ... Space layer 32 ... Metal plate 34 ... Heat dissipation layer 38 ... Intake duct

Continuation of the front page (56) References JP-A-5-332683 (JP, A) JP-A-60-80077 (JP, A) JP-A-57-52790 (JP, A) Jitsukaihei 3-83670 (JP , U) Actual development Sho 57-61499 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F26B 25/12 F27D 1/00

Claims (2)

(57) [Claims] 1. A heat insulating structure in a heat treatment apparatus, comprising an inner panel layer and an outer panel layer facing each other, and a space layer that can flow with the outside between the inner and outer panel layers, the space layer comprising: It is divided into a plurality of heat dissipation layers by one or a plurality of plate-shaped bodies facing the inner and outer panel layers, and the one or a plurality of plate-shaped bodies is the outer panel layer.
To the space layer by means of support rods in the space layer.
A heat insulating structure in a heat treatment device characterized by being held . 2. The structure according to claim 1, further comprising intake means for sucking air in the space layer.