JPS609612Y2 - High frequency heating device with heater - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high frequency heating device equipped with an electric heater.

High-frequency heating devices have the disadvantage that the food itself does not brown because it absorbs high-frequency power and generates heat on its own.

Also, baking bread and other oven dishes do not work well, so cooking with an electric heater is more effective.

The present invention relates to an electric heater installed in the heating chamber of a high-frequency heating device in order to improve this problem. The main features are that the heating chamber has a structure that is easy to clean, that it is difficult to attract dirt generated by cooking in the oven, and that the heating chamber is made of inexpensive materials.

In conventional high-frequency heating devices equipped with electric heaters, the heating chamber is generally made of heat-resistant metal such as stainless steel.

A heating chamber made of heat-resistant metal such as stainless steel is easy to clean when used as a high-frequency heating device, has low high-frequency loss, and has excellent corrosion resistance. In some cases, when oil or food residue generated from food is heated and burned, it has the disadvantage of being difficult to clean.

Furthermore, it is an expensive material.

When we examine the usage status of high-frequency heating devices equipped with electric heaters, we find that they are frequently used for high-frequency heating.

When using high-frequency heating, the temperature of the wall surface of the heating chamber does not become high, so it is necessary to wipe off the scattered food particles and clean it, so it is convenient to have a wall surface of the heating chamber that is easy to clean.

In order to improve the above-mentioned drawbacks, this invention exhibits a self-cleaning effect when the temperature rises to a certain degree when cooking in an oven using an electric heater, and when the wall temperature of high-frequency heating does not rise, the surface becomes It is smooth and easy to clean, and is coated with a self-cleaning catalytic heat-resistant coating, making it easy to clean and using an inexpensive material to prevent stains in the heating chamber that occur when heating with an electric heater.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a heating chamber in which food 5 is placed and subjected to high-frequency heating or electric heater heating, and 2 is a high-frequency oscillator that supplies high-frequency waves to the heating chamber 1.A magnetron 3 supplies high-frequency power oscillated by the magnetron 2 to the heating chamber 1. A waveguide 4 for guiding and supplying power is used to raise the ambient temperature of the heating chamber 1 in order to make indentations in the food 5 or to bake bread or cutlets in the oven in a high-frequency heating device constructed of such a waveguide. It is an electric heater.

The electric heater 4 may be a sheathed heater, an infrared heater, or the like, and receives power from outside the heating chamber 1 (not shown).

5 is a food to be heated by high frequency heating or electric heater.

A metal wall 6 forming the heating chamber 1 is a heat-resistant metal plate.

Stainless steel plates are commonly used as heat-resistant metal plates, but they are expensive in terms of material cost and have the disadvantage that food particles and oil stains that adhere to them are baked into them at high temperatures.

In the present invention, a hot-dip aluminized steel plate is used for the metal wall 6.

Aluminum surface-treated steel sheets are heat resistant to high temperatures of up to about 500°C, and because they are made of aluminum, they also have the advantage of having little loss against high-frequency currents.

However, there is a problem in the corrosion resistance of the inner wall of the heating chamber 1, and it is the same as a stainless steel plate in terms of resistance to oil stains baked in at high temperatures.

The present invention is a high-frequency heating device equipped with a heater configured as described above, in which a self-cleaning catalyst heat-resistant coating 7 is applied to the inside of the metal wall 6 of the heating chamber 1.

Catalytic heat-resistant coating 7 is a coating finish made by adding lime aluminate, calcium silicate, iron oxide, etc. as a catalyst to a silicate-based or phosphate-based inorganic paint binder through activation treatment. It has the ability to purify adhering dirt due to the action of

The self-cleaning catalytic heat-resistant coating 7 baked at a low temperature has a high catalytic activity, and some exhibit effectiveness at 200 to 300°C.

Moreover, since the catalytic heat-resistant coating 7 is a paint, the surface is smooth and has a finish similar to that of a general painted surface, leaving a structure that is easy to clean by wiping with a cloth.

As explained above, according to the present invention, it is possible to obtain a high-frequency heating device equipped with an electric heater that maintains the easy-to-clean structure of the heating chamber, which is a feature of the high-frequency heating device, and prevents staining of the heating chamber wall due to electric heater heating. .

Food particles scattered by high-frequency heating, which is commonly used, do not reach the point of burning because the temperature is not high.

In this case, the wall surface is smooth and painted, so it can be wiped off and is easy to clean.

Furthermore, when heating with an electric heater, food oil often splatters.

However, the walls also reach high temperatures, and the purifying ability of the self-cleaning catalytic heat-resistant coating decomposes oil stains and keeps the walls clean.

Further, in the case of painting, since it can be fired at a low temperature of about 200° C. to 300° C., it is possible to prevent warping and alloying of the aluminized steel sheet.

Furthermore, since the present invention uses a hot-dip aluminized steel plate, its surface is more porous than that of a simple aluminum material.

For this reason, when a self-cleaning catalytic heat-resistant paint is applied to this surface, it has better adhesion and is less likely to peel off, and the paint surface also becomes uneven, increasing the surface area and making it easier to exert the catalytic effect. It is.

[Brief explanation of the drawing]

The drawing is a longitudinal cross-sectional view of a high-frequency heating device equipped with a heater showing an embodiment of the present invention. 1... Heating chamber, 2... Magnetron,
4...Electric heater, 6...Heat-resistant metal plate, 7...Self-cleaning catalyst heat-resistant coating.

Claims (1)

[Scope of utility model registration request] The heating chamber includes a heating chamber in which food is placed and cooked, and a high frequency oscillator that supplies high frequency power to the heating chamber. The surface of the hot-dip aluminized steel plate is coated with a self-cleaning catalytic heat-resistant coating, and the self-cleaning catalytic heat-resistant coating is applied as a catalyst to a silicate-based or phosphate-based inorganic paint binder. A high-frequency heating device equipped with a heater made by adding activated lime aluminate, aluminum silicate, iron oxide, etc.