JPS6214060B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating device equipped with an electric heater.

In the conventional high-frequency heating device shown in FIGS. 1 to 3, for example, an electric heater mounting box 5 is installed on the rear surface of the heating chamber 1.
An electric heater 7 is installed in a shape that surrounds the fan 8 on an extension of the rotation radius of the circulation fan 8, but with this shape, it is difficult to cook bread or kutsky in two stages. However, because the hot air tends to circulate upwards, the food on the upper racks is heated faster, resulting in the browning of the upper and lower rows being significantly different, and only the top surface of the food being cooked.

However, when baking bread, kutsky, or other open cooking, it is essential to increase the temperature at the bottom of the food, so it is necessary to place the heater 7 below rather than above. be. Furthermore, since the conventional heater shape has double windings, there was also a drawback that the electric heater mounting box 5 could not be configured unless it was made larger.

The present invention overcomes the above-mentioned drawbacks of the prior art and its object is to provide an effective means of open cooking.

Furthermore, the present invention includes an electric heater and a fan in an electric heater mounting box provided at the rear of the heating chamber, and by circulating hot air between the heating chamber and the heater mounting box, two-stage cooking in the heating chamber is also possible. It aims to make it possible.

In order to achieve the above object, the heating device of the present invention makes the shape of the electric heater approximately M-shaped, makes the lower heating power stronger than the upper part, improves the balance in the browning of the food on the upper and lower tiers, and prevents the wrapping of food. This is an improvement that allows the heater mounting box to be made thinner by making it a single layer.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In the figure, 1 is a heating chamber in which food is placed and subjected to high-frequency heating or electric heater heating; 2 is a magnetron that is a high-frequency oscillator that supplies high-frequency power to the heating chamber 1;
3 is a waveguide that guides the high frequency power oscillated by the magnetron 2 to the heating chamber 1, and 4 is a top electric heater, which is fixed at the top of the heating chamber 1 and is used for grilling etc. It serves as a smiley face. As the upper surface electric heater 4, an electric heater such as an infrared heater is used. Reference numeral 5 denotes an inner box for installing an electric heater attached to the rear surface of the heating chamber 1, and an electric heater 7 for hot air circulation is attached by an insulator 6. Reference numeral 8 denotes a fan that radiates heat from the electric heater 7 and circulates air to maintain a uniform temperature within the heating chamber 1. 9 bakes bread using hot air circulation components such as electric heater 7 and fan 8;
It is an open saucer used when baking kutsky and other open dishes.

In a high-frequency heating device with an electric heater configured as described above, if the shape of the electric heater for hot air circulation is approximately M-shaped and installed around the circulation fan, heat exchange between the electric heaters can be performed efficiently, and the heating chamber It becomes possible to blow hot air that is stronger downward than upward in the interior.

In this way, when cooking in two stages, the upper and lower stages, as with conventional high-frequency heating equipment, the upper stage will cook faster, and when the cooking is done, uneven cooking will occur between the upper and lower stages. This will prevent major drawbacks.

In general, when cooking cakes, breads, etc. in the oven, it is said that the heat on the bottom side of the plate is stronger than the top side of the plate. If an electric heater is provided and the bottom of the electric heater mounting box is sloped, hot air can be smoothly blown downward into the heating chamber, allowing effective oven cooking. Furthermore, since the heater shape is approximately M-shaped and the heater winding is made in one plane, the terminal part of the heater can be pulled out from the bottom side of the mounting box, the temperature of the terminal part is low, and the lead wire to be connected has a heat resistant temperature. Therefore, it is possible to use a material with a low value, that is, a cheap material. In addition, the depth of the inner box to which the heater is attached can be narrowed, making the inner box smaller, which not only reduces material costs, but also reduces product dimensions in the depth direction, making the product smaller and lighter. can be achieved.

If the product can be made smaller and lighter in this way, the cost of packaging materials will be reduced, and the number of products that can be loaded on a transport vehicle will increase, making it possible to reduce the transportation cost per product.

Compared to conventional devices, the high-frequency heating device of the present invention not only enables effective two-tier cooking, but also improves the circulation of hot air by making the inner box to which the electric heater is attached shallow and small. Since the volume is smaller, heating efficiency is also increased, and the time required for the temperature inside the oven to rise is shortened, allowing for efficient oven cooking.

By forming the electric heater into a substantially M-shape as described above, an energy-saving high-frequency heating device with good thermal efficiency can be obtained at a low cost.

[Brief explanation of the drawing]

Figure 1 is a front sectional view of the main part of a conventional high-frequency heating device with an oven, Figure 2 is a side sectional view of the main part, and Figure 3
This figure is a front view of the electric heater attachment part, FIG. 4 is a side sectional view of a main part of a high-frequency heating device with an oven showing an embodiment of the present invention, and FIG. 5 is a front view of the electric heater attachment part. 1...Heating chamber, 2...Magnetron, 3...Waveguide,
4...Top electric heater, 5...Electric heater mounting box, 6
...Insulator, 7...Electric heater, 8...Circulation fan, 9...
Oven saucer.

Claims (1)

[Claims] 1. A heating chamber in which food is placed and cooked, and an electric heater mounting box equipped with an electric heater, a circulation fan, etc. on the rear surface of the heating chamber, and the electric heater has an approximately M-shape, and In the heating device, the electric heater is installed so as to be located around at least a side and a lower part of the circulation fan, and a bottom surface of the electric heater mounting box is inclined toward the heating chamber.