JPH0830583B2 - Heating device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat insulating structure for a case body of a heating device.

2. Description of the Related Art In a conventional heating device having an electrothermal heating function, a heating chamber outer wall is provided on the entire circumference or part of the heating chamber except for the opening of the heating chamber for the purpose of keeping the heating chamber warm or protecting other parts constituting the heating device. A heat insulating plate is provided at intervals of several mm. Especially, the top surface of the heating chamber has the most heat dissipation, and it is indispensable to provide heat insulation. Therefore, a method of forming an air layer with a heat insulating plate to block the heat, asbestos, glass wool, asbestos on the top surface of the heating chamber, etc. A structure in which a heat insulating material made of a heat resistant material such as the above is attached has been used.

A conventional heating device will be described with reference to FIGS. 4 and 5. As shown in the figure, on the upper surface 2 and the lower surface 3 of the heating chamber 1,
Power supplies 4a and 4b, which serve to bake the object 5 to be heated, are closely provided. 9a, 9b and 10a, 10b are heat insulating materials and heat insulating plates provided outside the heat sources 4a, 4b provided on the upper surface 2 and the bottom surface 3 of the heating chamber 1 to prevent heat dissipation in the heating chamber 1 and to provide a heating device. It protects other components that make up the. 7
Is a front plate that constitutes the heating chamber 1, and is fitted to the case body 6.

Problems to be Solved by the Invention However, in the structure in which the flange of the front plate 7 and the case main body 6 are fitted over the entire fitting surface, the heat source
The heat of the upper surface 2 of the heating chamber 1 which becomes about 500 ° C. by 4a
There has been a problem that the front plate 7 is conducted to raise the temperature of the case body that a person touches.

Moreover, since the front end of the case body 6 is inserted into the flange of the front plate 7 in a bag shape, if the front end is too small, it cannot be inserted into the flange of the front plate 7 and the workability deteriorates. There was play and there was a problem in appearance.

The present invention solves such conventional problems, and an object of the present invention is to provide a heating device having a simple structure and an improved heat insulating effect of the case body.

Means for Solving the Problems In order to achieve the above object, the heating device of the present invention includes a heating chamber that stores an object to be heated, a door that is openably and closably provided at an opening of the heating chamber, and the heating device. The case main body includes a front plate that is provided around the chamber opening and has a flange that is provided with holes and protrusions at the top and bottom, a heat source that supplies heat to the heating chamber, and a case body that covers the outer periphery of the heating chamber. Has a bag-shaped end portion corresponding to the flange portion of the front plate, and the bag-shaped portion of the main body case and the flange portion of the front plate are fitted together.

Further, the projection of the front plate is provided on the end face side of the hole.

Action The heating device of the present invention reduces the heat transfer area to reduce the heat transfer to the tip of the front plate by providing holes for the heat of the front plate which has become high temperature, and further reduces the heat conduction by the protrusion. It has the effect of insulating the case body and improving workability and appearance performance.

Embodiment Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 2, heat sources 4a and 4b are provided in close contact with the upper surface 2 and the bottom surface 3 of the heating chamber 1, and the object 5 to be heated in the heating chamber 1 is cooked through the upper surface 2 and the bottom surface 3. A front plate 7 provided with upper and lower flanges for attaching the case body 6 is attached to the front surface of the heating chamber 1. Front plate 7 for loading and unloading objects to be heated
A door 8 is provided to open and close. The door 8 is closed during cooking of the object 5 to be heated, and constitutes the wall surface of the heating chamber.

1 and 3 are an arrow view and a sectional view showing a fitting portion between the front plate 7 and the case body.

In FIG. 1, a hole 7a is provided near the heat source of the flange portion of the front plate 7 that fits with the case body 6, and the heat source is more than the hole 7a.
Protrusions 7b are provided on the top and bottom at a position far from 4a. The case body 6 has a bag shape so as to come into contact with the upper and lower protrusions 7b provided on the flange portion of the front plate 7. FIG. 3 is a sectional view in which FIG. 3 is fitted.

 The operation of the above configuration will be described below.

Top surface 2 and bottom surface 3 that are in close contact with heat sources 4a and 4b during electric heating
Is about 500 ° C., the front plate 7 attached to the top surface 2 and the bottom surface 3 is heated to a very high temperature. By providing a hole in the flange portion of the front plate 7 that fits with the case body 6 near the heat source 4a, the heat conduction area is reduced by the amount of this hole, and heat conduction is hindered. Further, as shown in FIG. 1, since the area of the B portion behind the hole 7a is larger than the area of the A portion connecting the hole portions 7a, heat is diffused and the position away from the heat source 4a from the hole 7a of the front plate 7 is increased. When fitted together, the heat insulating effect of the case body 6 increases.

Further, since the upper and lower protrusions 7b are provided on the fitting portion, point contact with the case body 6 is achieved, and heat conduction can be reduced.

Further, forming the protrusion 7b from the heat source 4a rather than the hole 7a makes point contact via the protrusion 7b when the temperature of the front plate 7 is low, so that heat conduction to the case body is extremely reduced.

Further, as shown in FIG. 3, by providing a clearance a between the fitting portion of the front plate 7 and the case main body 6 and the top plate, the conduction path becomes longer, and heat conduction to the top surface where a person touches due to heat dissipation is suppressed. You can

Thus, according to this embodiment, the front plate 7 has the holes 7a and the protrusions.
The addition of 7b has the effect of lowering the very high temperature of the front plate 7 efficiently and surely.

Effects of the Invention As described above, according to the heating device of the present invention, the following effects can be obtained.

(1) By reducing the contact area between the front plate and the case body, the front plate has a very high temperature,
The temperature of the case body can be lowered and a safe device can be realized.

(2) By forming a hole, the conduction area of the fitting portion is larger than the conduction area of the hole, and the temperature of the case body can be lowered by the diffusion effect, so that a safe device can be realized.

(3) Since the temperature of the case body is low, it is possible to use a printed steel sheet having a lower heat resistance grade than the conventional one, which is economical.

(4) Since the case body and the front plate are in point contact with each other, even if the fitting size changes to some extent, the fitting can be smoothly fitted and the workability is improved.

(5) Even if the fitting dimensions change to some extent, the fitting can be done smoothly, so that the fitting can be done a little stronger and there is no backlash between the front plate and the case body, and the appearance performance is improved.

Although the projections are provided on the upper and lower sides of the front plate in the embodiment, the present invention is not limited to this, and the projections may be formed where the front plate and the case main body contact each other. For example, if the upper part of the front plate and the case body are in contact with each other, the same effect can be obtained by providing a protrusion on the upper part of the front plate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a main part of a heating device according to an embodiment of the present invention, FIG. 2 is a sectional view of the same, FIG. 3 is a sectional view of the same part, and FIG.
FIG. 5 is a sectional view showing a conventional embodiment, and FIG. 5 is a sectional view of the relevant part. 1 ... Heating chamber, 4a, 4b ... Heat source, 6 ... Case body, 7
…… Front plate, 7a …… hole, 7b …… projection.

Claims (2)

[Claims] 1. A heating chamber for accommodating an object to be heated, a door openably and closably provided at an opening of the heating chamber, and a flange provided around the opening of the heating chamber and provided with holes and protrusions at upper and lower sides. A front plate having a heat source for supplying heat to the heating chamber,
A case main body that covers the outer periphery of the heating chamber is provided, and the case main body has a bag-shaped end portion corresponding to the flange portion of the front plate, and the bag-shaped portion of the main body case and the flange portion of the front plate are fitted to each other. A heating device configured to match. 2. The heating device according to claim 1, wherein the projection of the front plate is provided closer to the end face side than the hole.