JPS6125198Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to the improvement of high-frequency heating equipment, and in particular, a movable heater is installed in the heating chamber.
The purpose is to expand the scope of use and improve thermal efficiency.

This invention will be explained below with reference to an example shown in the drawings. 1 is a heating box with a heating chamber 2 inside which is irradiated with high frequency waves; 3 is a heating box with two parallel parallel holes formed in the rear wall of the heating box; , the major axis A has a dimension equivalent to 5/4 wavelength of the high frequency used.

4 are terminal portions 5 at both ends from the through hole 3, respectively.
It is a sheathed heater with a protruding part and is housed so as to be able to freely move up and down within the through hole 3. 6 is a metal partition plate, 7 is a metal shielding plate in the shape of an open front case fixed to the back of the heating box 1, and a length B is attached at the center of the back.
forms an outlet 8 that is several mm longer than one wavelength of the high frequency.

Reference numeral 9 denotes a high frequency attenuation chamber formed between the shielding plate 7 and the heating box 1, which has width C and depth D equivalent to 1/4 wavelength and 1/8 wavelength of the high frequency, respectively, and has a depth Similarly, E has a dimension equivalent to about 1/4 wavelength.

10 is the entrance of the high frequency attenuation chamber 9, 11 is the heater 4
It is a metal moving plate that holds both ends of the shield plate 7 and moves in the vertical direction together with the shield plate 7, and forms a predetermined gap S between it and the shield plate 7. Reference numeral 12 denotes a series of bent portions formed on both side edges of the movable plate, which closely face the side surface of the heating chamber 2 over a predetermined length W, for example, equivalent to 1/4 wavelength of high frequency waves or more.

13 is a roller that is in contact with the front surface of the moving plate 11;
Reference numeral 14 denotes a metal mounting plate that rotatably supports this roller, and is attached to the back of the heating box 1 so as to surround the entire periphery of the two shielding plates 7. 15 is a radio wave absorber attached to the surface of the mounting plate facing the shielding plate 7 along its entire length; 16 is a moving plate 11;
The roller 17 in contact with the back surface of the roller is a roller holder.

With the above configuration, if high-frequency heating is performed now, high-frequency waves will leak to the outside from the through holes 3, but
In this invention, since the high frequency attenuation chamber 9 is provided, such high frequencies can be almost completely eliminated. Even if a high frequency wave that is not extinguished here goes out through the gap S, it will be absorbed by the radio wave absorber 15 and extinguished.

On the other hand, if the moving plate 11 is operated, the rollers 13.1
Heater 4 can be moved stably by heater 6.
The height can be selected arbitrarily.

As described above, according to this invention, since the heater can be moved in parallel, even if the heat generation amount of the heater is constant, by changing the height of the heater, the fire power applied to the object to be heated can be controlled over a wide range from high heat to low heat. It is possible to cope with objects to be heated, and improve thermal efficiency. Furthermore, since the radio wave absorber and the roller are mounted using a mounting plate, leakage of high frequency waves can be sufficiently prevented, and a separate mounting means is not required, making the structure simple.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of this invention, and FIG. 2 is a longitudinal cross-sectional view of the main part. In the figure, 2 is a heating chamber, 4 is a heater, 7 is a shielding plate, 9 is a high frequency attenuation chamber, 11 is a moving plate, 13.1
6 is a roller, 14 is a mounting plate, and 15 is a radio wave absorber.

Claims (1)

[Scope of utility model registration request] A heating chamber having an elongated through hole in a wall surface, a heater provided within the heating chamber and having an end protruding from the through hole to the outside so as to be movable in the longitudinal direction of the through hole, and a heater on the wall surface of the heating chamber. a high-frequency attenuation chamber formed to surround the heater at a protruding portion; a movable plate that holds the protruding end of the heater and is movable in the longitudinal direction of the through hole; and a transparent plate on the outer wall of the heating chamber. A high-frequency heating device comprising: a mounting plate provided to surround a hole; a roller that contacts the moving plate is mounted on the outside of the mounting plate; and a radio wave absorber is provided inside the mounting plate to absorb high-frequency waves leaking from the through-hole. .