JPS6012969Y2 - High frequency heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention is concerned with the improvement of a high-frequency heating device that heats an object to be heated, such as food, using a high-frequency oscillator and an electric heater or a gas heater as a heating source.

The conventional high-frequency heating device with the above-mentioned functions is the first
Shown in the figure.

In FIG. 1, a metal saucer 5 is used as a saucer on which the object to be heated 6 is placed, and in order to enable the metal saucer 5 to be used for both heater heating and high-frequency heating, the height of the metal saucer 5 is Several protrusions 10 for holding at different angles
Dielectric storage racks 9 having the following characteristics were attached to the left and right sides of the heating chamber 3.

Since this dielectric storage shelf 9 is generally integrally molded from ceramic such as cordierite, which has low high frequency loss and excellent heat resistance, it has no choice but to have a large surface area and thickness.

Therefore, thermal energy is absorbed by the dielectric shelf 9 during heating by the heater, and the time required for the temperature in the heating room to rise becomes longer.

Furthermore, since the effective dimensions of the heating chamber are reduced by the thickness of the dielectric tray 9, the metal tray 5 must be made considerably smaller than the horizontal cross-sectional area of the heating chamber 3.

The present invention solves the above-mentioned drawbacks and will be explained below with reference to the drawings.

An embodiment of the high-frequency heating device of the present invention is shown in FIG. 2. In this figure, reference numeral 1 denotes a high-frequency oscillator for supplying high-frequency energy into the heating chamber 3 through a waveguide 2.

Reference numeral 4 denotes an electric heater or gas heater that raises the temperature of the air in the heating chamber 3 and heats an object 6 such as food placed on a metal saucer 5.

Reference numeral 7 denotes a metal protrusion provided on the wall surface of the heating chamber 3 in order to hold the metal saucer 5 at an appropriate height during heating by the heater.

Reference numeral 8 denotes a dielectric protrusion fixed to the wall surface of the heating chamber 3 in order to hold the metal saucer 5 during high-frequency heating.

When the dielectric protrusion 8 is heated by the heater, it is divided by II ÷ metal saucer 5.
may be retained.

The metal protrusion 7 is used only during heater heating and is not used during high frequency heating.

This is because sparks are generated between the periphery of the metal saucer 5 and the metal protrusion 7 during high-frequency heating, melting the enamel coating the surface of the metal saucer 5, or melting the metal protrusion 7 itself or its vicinity. This is because the wall surface of the heating chamber 3 will be damaged.

FIG. 3 is an enlarged view of the vicinity of the dielectric protrusion 8 surrounded by a circle in FIG.

The dielectric protrusion 8 includes a support portion 8a that supports the load of the metal saucer 5, a peripheral edge 5a of the metal saucer 5, and a peripheral edge 5a of the metal saucer 5.
A spacer 8 that maintains an appropriate distance between the two metals 5awaa to prevent sparks between the heating chamber wall 3a facing the metal 5awaa.
It is composed of b.

The support portion 8a and the spacer 8b are made of a dielectric material such as steatite, fugilite, petalite, Teflon, etc., which has low high frequency loss, excellent heat resistance, and strong impact resistance, and both 8a and 8b may be formed into a single piece.

Numerals 11 and 12 are screws and nuts for fixing the dielectric protrusion 8 to the wall surface of the heating chamber 3, respectively.

As described above, according to the present invention, the metal saucer base is held at an appropriate height by the metal protrusion 7 during heater heating and by the dielectric protrusion 8 during high frequency application. The effective dimensions inside the heating chamber 3 can be increased, and the number of dielectric parts installed inside the heating chamber 3 is reduced, which reduces the amount of thermal energy taken away by the dielectric during heater heating and the amount of high-frequency energy taken away by the dielectric during high-frequency heating. Therefore, a high frequency heating device with good heating efficiency is provided.

[Brief explanation of the drawing]

Fig. 1 shows a conventional high-frequency energizing device, Fig. 2 shows an example of the high-frequency energizing device of the present invention, and Fig. 3 shows an enlarged view of the vicinity of the dielectric protrusion 8 surrounded by the circle in Fig. 2. . □1...High frequency oscillator, 4...
...Electric heater or gas heater, 5...
・Metal saucer, 7...Metal protrusion, 8...
Dielectric protrusion.

Claims (1)

[Scope of utility model registration request] In a device that uses a high frequency oscillator and an electric heater or a gas heater as a heating source, a metal protrusion provided on a heating chamber wall surface to hold a metal saucer on which a heated object is placed at an appropriate height during heating by the heater; A high-frequency heating device characterized in that a dielectric protrusion fixed to a wall surface of the heating chamber is provided to hold the metal saucer during high-frequency heating.