JPH0642398B2 - Heating device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to uniform heating during radio wave heating in a high-frequency heating device with a heater.

2. Description of the Related Art In a conventional high-frequency heating apparatus with a rotary table heater shown in FIG. 2, for example, a circulation fan 20 and a heater for cooking food with hot air are provided above a heating chamber 19 for containing an object to be heated. 21 is provided, and hot air is circulated in the heating chamber 19 as indicated by an arrow in the figure to heat the food or the like placed on the heater heating tray 22. During high frequency heating, high frequency radio waves are supplied from the high frequency oscillator 23 into the heating chamber 19 through the waveguide 24 and the heating chamber power supply port 25, and the rotary mounting table 26 is rotated.
It is configured to heat foods and the like placed on top of. And in the case of such a rotary mounting table type high frequency heating device, as a method for obtaining uniform heating, since the food is rotatably moved by the rotating mounting table in the planar heating distribution, almost uniform heating is obtained, For tall foods such as roast beef, it is necessary to pay attention to the electric field distribution in the vertical direction, and solve the problem that there is no change in the electric field for food at the center of rotation, which is a problem peculiar to the rotary table. To this end, the position and the opening shape of the heating chamber power supply port 25 are adjusted, and when the rotary mounting table 26 is made of a radio wave transmitting material such as crystallized glass, the uneven shape of the heating chamber bottom wall may be devised, or The side wall of the heating chamber or the rear wall is shaped to have an appropriate depth, and various measures have been taken to obtain a good heating result.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in such a rotary mounting table type high-frequency heating device with a heater, a plurality of shelves 27, 28, 29, 30 are provided on the side wall of the heating chamber for catching a tray used for heating the heater. Since it is necessary to adjust the position of the heating chamber power supply port 25 in order to adjust the electric field distribution in the vertical direction as described above, the shelves 29 and 30 cannot be freely adjusted and the side wall of the heating chamber cannot be adjusted. It is also difficult to narrow down and adjust the depth appropriately.

Further, when the rotary mounting table is made of metal, no matter how the bottom shape of the heating chamber is devised, the metal intervenes between the metal and the food, so that the food has no effect. As mentioned above,
A high-frequency heating device with a heater and a metallic rotary mounting table type has a problem that it is very difficult to make adjustments to obtain uniform heating during high-frequency heating.

The present invention solves such a conventional problem, and an object thereof is to obtain better uniform heating during high frequency heating in a high frequency heating device with a heater including a metallic rotary mounting table.

Means for Solving Problems In order to achieve the above object, the metal rotary mounting table type high-frequency heating device with a heater of the present invention is devised in the shape of the shelf of the side wall of the heating chamber to achieve uniform heating during high-frequency heating. It is a configuration to obtain.

Effect The high-frequency heating device with a heater of the present invention has a shelf shape for the saucer when heating the heater, which is provided on the side wall of the heating chamber, and is not a shape for simply placing the saucer. To obtain the vertical distribution of
The shelves are greatly narrowed down to the extent that the electric field mode in the heating chamber is changed or the way of reflection of radio waves is changed to obtain uniform heating, and in the case of the rotary mounting table type, Since it is easier to obtain uniform heating when the food is rotated when the electric field distribution is not symmetrical about the transfer table, the shelf shape is provided asymmetrically.

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

As shown in FIG. 1, 1 is a heating chamber for storing foods, 2
Is an outer box that covers the heating chamber 1 and the machine room, and 3 is a high-frequency oscillator that supplies high-frequency energy into the heating chamber 1, and high-frequency energy is supplied into the heating chamber through the waveguide 4 and the heating-chamber power supply port 5. It 6 is a metallic rotary mounting table on which the food 7 is placed and which is rotated, and a rotating shaft 9 is rotated by a motor 8.
A roller support portion 1 detachably provided on the rotating shaft 9.
0 rotates with the movement of the rotation shaft 9, the roller 11 rotatably fixed to the tip of the roller support 10 also rotates, and the rotary mounting table 6 rotates. 1
Numerals 2 and 13 are a circulation fan and a heater which work when the heater is heated, and their functions are as described in FIG. 2 of the conventional example.
Shelf-shaped convex portions 14, 15, 16 and 17 are shelves of the heater heating tray 18 according to the present invention, which are asymmetrical as shown in the figure and irregular so that uniform heating can be obtained depending on the shape. It has a simple shape.

EFFECTS OF THE INVENTION As described above, the following effects can be obtained according to the rotary mounting table type heater additional heating device of the present invention.

(1) Since the side wall of the heating chamber is narrowed to a relatively large extent so as to affect the high frequency electric field, the mechanical strength of the side wall can be improved, and the deformation of the heating chamber wall due to expansion of the heating chamber wall is prevented even at high temperature during heating.

(2) Since uniform heating is obtained by devising the shape of the shelf of the heating chamber side wall, it is possible to use a metallic rotary mounting table that covers the heating chamber bottom wall that affects the electric field distribution, and the conventional crystal It can be constructed at a lower cost than that of fossil glass.

(3) For the same reason as (2) above, it is possible to use a metallic rotary mounting table, and since the heat capacity is smaller than that of the conventional crystallized glass rotary mounting table, the temperature inside the chamber during simultaneous heating with a heater and high frequency Rises faster.

[Brief description of drawings]

FIG. 1 is a front sectional view of a high frequency heating apparatus with a heater according to an embodiment of the present invention, and FIG. 2 is a front sectional view of a conventional high frequency heating apparatus with a heater. 1 ... Heating chamber, 3 ... High-frequency oscillator, 6 ... Rotating table, 13 ... Heater, 14-17 ... Shelf, 18 ...
Saucepan for heating the heater.

Claims (1)

[Claims] 1. A heating chamber for accommodating an object to be heated, a high-frequency oscillator for supplying high-frequency energy into the heating chamber, a metallic rotary mounting table on which the object to be heated is rotated, a heating means by a heater, and the above heating. A heating device having left and right side walls of a chamber and a shelf-shaped convex portion on which a tray used for heating the heater is placed, and the shelf-shaped convex portion is integrally formed with the heating chamber side wall and has a laterally asymmetrical shape.