JPH0654716B2 - Heating cooker - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heating cooker that heats an object to be heated in a heating chamber by the heat of a heater, such as an electric oven or a microwave oven with a heater.

2. Description of the Related Art FIG. 4 is a sectional view showing a conventional heating cooker. In FIG. 4, the heating chamber 1 is provided with an upper heater 2 and a lower heater 3 at the lower part, and the food 5 placed on the pan 4 is heated by the heater to cook. Further, a magnetron 6 is provided to irradiate radio waves to the heating chamber 1 through the waveguide 7 so that the food 5
It shows a so-called heater that heats a radio wave and a microwave oven that combines heating of a radio wave. FIG. 5 is a perspective view showing the heater 3 used in the conventional heating cooker.

The problem to be solved by the invention However, according to such a conventional heating cooker, since the upper heater 2 and the lower heater 3 are exposed in the heating chamber 1, the heating chamber is effective by that much. In order to reduce the volume and store large food,
Since it is necessary to make the heating chamber 1 larger by the size occupied by the heater and the outer shape becomes larger, a large installation space is required, which makes the cooking device difficult to use. Further, when the heaters 2 and 3 are exposed in the heating chamber 1, when the dirt of the food is scattered on the wall surface of the heating chamber 1, the heaters 2 and 3 are a hindrance and it is difficult to clean. None, especially on the bottom of the heating chamber, food juice or the like tends to collect as dirt, and this dirt is baked on the bottom of the heating chamber by the lower heater 3 and cannot be easily cleaned.
It was inconvenient to use.

In order to solve such a problem, a heater is taken out of the heating chamber 1 and installed in a plane, and in order to efficiently transfer the heat of the planar heater to the heating chamber, the heater is attached to the inner wall of the plane. There was a configuration proposal such as applying a coating film for far infrared radiation, but with such a configuration plan, the effective volume of the heating chamber becomes large, but on the other hand, on the wall surface of the heating chamber, which is close to the planar heating element. Had a problem that thermal deformation is likely to occur, and the coating film for far infrared radiation is easily scratched when the food container is taken in and out.

The present invention is to eliminate such conventional problems, excellent thermal efficiency, the heating chamber, with a clean,
The object of the present invention is to provide a heating cooker which is easy to use, such as preventing deformation of the heating chamber wall, eliminating heating unevenness, and almost eliminating dirt in the heating chamber.

Means for Solving the Problems In the heating cooker of the present invention, a part of the wall surface of the bottom of the heating chamber is formed so as to project downward, and a ceramic radiation coating layer is applied to the projecting surface.

Further, a heating element is brought into close contact with the outer surface of the protruding portion of the bottom wall surface of the heating chamber via an insulator. The upper surface of the rotary mounting table on which the object to be heated is placed is provided at substantially the same height as the bottom surface of the heating chamber, that is, the lower surface of the opening of the front surface of the heating chamber. By this, the dirt accumulated on the bottom surface of the heating chamber is automatically erased, and the radiation layer is prevented from being damaged.

Operation According to the present invention, since the central portion of the bottom of the heating chamber is formed so as to project downward, juice and the like scattered from the food product flows into the projecting portion. On the other hand, since the planar heater is provided in close contact with the outer surface of the outer wall of the protruding portion, the entire area of the protruding portion can be heated to an extremely high temperature, and dirt such as oil that has flowed in can be burned out automatically. Also, the radiation coating on the inner wall of the protruding portion can efficiently radiate heat into the heating chamber to improve the heat efficiency, and the radiation coating can efficiently remove the above-mentioned accumulated dirt in a short time. Produces the effect of burning out. Further, since the bottom surface of the heating chamber is formed in the projecting portion by drawing or the like, the heating chamber is maintained in a tight state and is not easily deformed even when exposed to high temperature. Furthermore, the upper surface of the rotary mounting table is provided at substantially the same height as the lower surface of the opening in front of the heating chamber, and when pulling out the food container, etc., it slides on this surface.
Since the radiation coating film is provided only on the inner surface of the projecting portion wall while avoiding this surface, the radiation coating film is not damaged, the thermal efficiency is not lowered, and the aesthetic appearance is not impaired.

Embodiment One embodiment of the present invention will be described below with reference to the drawings. First
FIG. 1 is a side sectional view showing the structure of a heating cooker according to the present invention. In FIG. 1, a sheet heater 8 is provided in close contact with the outer surface of the ceiling or bottom of the heating chamber 1. Reference numeral 9 is a heat insulating material for preventing heat from escaping to the outside. Further, the magnetron 6 is provided in the waveguide 7 and heats the object to be heated 5 on the object to be heated rotary mounting table 10 by high frequency. With the above configuration, the object to be heated 5 is
Both heater heating and high frequency heating can be performed. Reference numeral 11 is a door, and when the object 5 to be heated is pulled out forward, it can be horizontally slid from the bottom surface of the front opening of the heating chamber 1 to the upper surface of the door 11. That is, as will be described later, a bottom of the heating chamber is provided with a protrusion protruding downward in a trapezoidal shape. This is because a table is provided.

FIG. 2 is a partial cross-sectional view showing the bottom of the heating chamber 1 in detail. The central portion of the bottom of the heating chamber is projected downward by a trapezoidal shape as shown in FIG. The far-infrared radiation coating film 12 made of a material such as ceramic is applied to the inner wall of the protruding portion. Further, the planar heater is closely attached to the outer wall of the protruding portion. Reference numeral 13 is a motor for rotationally driving the object-to-be-heated rotary mounting table 10.

FIG. 3 is a perspective view of each component obtained by disassembling the configuration of the lower planar heater 8 in detail.
A is wound around a bobbin 8b made of a heat-resistant insulating material such as mica, and the upper and lower parts thereof are similarly pressed and fixed by an insulating plate 8c such as mica and a sandwiching pressing plate 8d.

With the above configuration, when heating proceeds and the planar heater 8 generates heat, the protruding portion on the bottom surface of the heating chamber 1 also immediately becomes hot, but since it is formed into a trapezoidal shape by drawing, it was stretched in the horizontal direction. Since it is in a box shape while maintaining the state, it hardly deforms. Further, since the radiation coating layer 12 is provided on the protruding portion of the bottom of the heating chamber 1, heat dissipation is good, efficiency is improved, and food juice and the like scattered from the object to be heated 5 are heated. It becomes possible to burn off immediately.

For this radiation coating film 12, a black ceramic material is most suitable in order to enhance the radiation effect, but in general,
Such a coating film has a defect that it is vulnerable to mechanical shock and abrasion and easily peeled off.

However, in this configuration, since the radiation coating film 12 is not touched at all when the object 5 to be heated is taken in and out, the radiation coating film is not damaged. Further, since the convex portion on the bottom surface of the heating chamber 1 is in close contact with the planar heater 8, the temperature becomes extremely high and the metal is easily oxidized, but the radiation coating layer 12
However, this high temperature portion is selectively protected, and deterioration due to oxidation or the like can be completely prevented.

Effects of the Invention According to the invention as described above, the following effects can be exhibited.

(1) Form the center of the bottom of the heating chamber to project downward,
By attaching a radiant coating on the inner surface and a sheet heater on the outer surface, stains such as simmered liquid that splashes from food can be automatically burnt out during heating and always kept clean.

(2) Since the bottom surface of the heating chamber is formed into a trapezoidal shape by drawing, there should be no thermal deformation, the close contact with the planar heater is maintained, and there should be no uneven heating and a cooker with high thermal efficiency should be provided. You can

(3) The object to be heated can be pulled out smoothly in the forward direction, and since it does not touch the radiation coating film at all, the radiation coating film is not scratched, the thermal efficiency is reduced due to peeling, and the aesthetic feeling is There's nothing wrong.

(4) Since the radiation coating protects the high temperature area on the bottom of the heating chamber,
Prevents deterioration due to oxidation and prolongs the life of the heating chamber.

[Brief description of drawings]

FIG. 1 is a side sectional view of a heating cooker according to the present invention, FIG.
The figure is an enlarged cross-sectional view of the same main part, FIG. 3 is an exploded perspective view showing the structure of the heater, FIG. 4 is a cross-sectional view of a conventional cooking device, and FIG. 5 is a perspective view of the heater. DESCRIPTION OF SYMBOLS 1 ... Heating chamber, 8a ... Heating element, 8b ... Reel, 8c ... Insulating plate, 10 ... Rotating table for object to be heated, 11 ... Door, 12 ... Radiant coating film.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-61-153414 (JP, A) JP-A-61-208789 (JP, A) JP-A-61-259030 (JP, A)

Claims (1)

[Claims] 1. A heating chamber for accommodating an object to be heated, a rotary mounting table for mounting and rotating the object to be heated, and an outer surface of a bottom wall constituting the heating chamber, which are in close contact with each other through a heat-resistant insulator. In the configuration having a heating element, and an opening and a door in front of the heating chamber for putting in and out the object to be heated, the heating chamber bottom wall is formed with a protruding portion partially protruding downward. The inside of the part is provided with a radiation coating on its inner wall surface, and the rotary mounting table is provided so that the upper surface of the rotary mounting table is at substantially the same height as the lower surface of the opening in front of the heating chamber. A heating cooker characterized in that the heating element is brought into close contact with an outer wall via an insulator.