JPS6364880B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high frequency heating device with a heater.

High-frequency heating devices have the disadvantage that food cannot be browned because the food itself absorbs high-frequency power and generates heat on its own. Therefore, a high-frequency heating device with a heater was considered, and a sheathed heater, which has an electric heating coil and an insulating filler built into a metal pipe, was adopted as the heater. This sheathed heater has an electric heating coil covered with a metal pipe, so high frequencies do not have a negative effect on the electric heating coil, making it suitable for use.

Conventional high-frequency heating devices with heaters are shown in Figures 1 and 2.
As shown in the figure, since a chiyoke structure was provided on the outer wall of the heating chamber 3, the following drawbacks occurred.

One is that the yoke structure 12, which also serves to hold the heater 9, is provided on the outer wall of the heating chamber 3.
The distance A between the support part of the heater 9 and the tip of the heater 9 becomes longer, and the tip is more likely to wobble, which adversely affects the quality of cooking during high-frequency heating. In other words, since the heater 9 is located between the entrance of the radio wave heating chamber and the object to be heated 4, the electric field is leaked due to rattling, and the original cooking performance during high frequency heating cannot be fully demonstrated. It is.

In addition, in today's world where there is a demand for products that are compact and can be installed in small spaces, the Chi York structure 12
This resulted in a product that was larger than necessary, and homes with relatively small kitchens tended to avoid it because there was no space to store the high-frequency heating device.

In addition, due to the large external dimensions, shipping costs are incurred, as well as cushioning materials and outer packaging used to protect the product from vibrations during transportation or from scratches if the product is accidentally dropped. A large size was required to match the product, which caused an increase in costs.

Therefore, the present invention solves the conventional drawbacks by providing a chiyoke structure within the heating chamber.One embodiment of the present invention will be described below.

3 to 5 show a high-frequency heating device with a heater according to an embodiment of the present invention.

In this embodiment, during high-frequency cooking, the radio waves generated from the magnetron 1 used as a high-frequency oscillator are introduced into the heating chamber 3 via the waveguide 2, passed through the heater 9, and absorbed into the object to be heated 4. ,Cook. The cooking performance at this time is fully demonstrated when the heater 9 is attached to a fixed position. As shown in Figure 3, a heater holder 11 is provided to prevent the tip of the heater 9 from moving up and down, but cooking performance can be improved by moving or changing the shape of this heater holder 11. It gets worse. For this reason, anything that generates an electric field between the object to be heated 4 and the entrance of the heating chamber 3 needs to be installed in a completely fixed state.

Therefore, in this embodiment, the chiyoke structure 12 was installed inside the heating chamber 3. and terminal 9a of heater 9
The heater 9 was drawn out of the heating chamber 3 through the opening 3a in the wall of the heating chamber 3 through the yoke structure 12, and the drawn-out portion of the heater 9 was supported by the yoke structure 12.

With this configuration, the heater 9 in the heating chamber 3
Since the distance between each part and the support part is reduced, the wobbling of the heater 9 is substantially eliminated, and the disturbance of the electric field due to the wobbling of the heater 9 is eliminated.

Furthermore, since the tip is supported in the vertical direction by the heater holder 11, this also makes it possible to further eliminate wobbling. In addition, since the chiyoke structure 12 is installed inside the heating chamber 3, the external dimensions of the main body B can be reduced, making it more compact, and reducing costs such as transportation costs.
In addition, the chiyoke structure requires a dimension of λ/4 of the used wavelength (approximately 30 mm) to prevent high frequency leakage, so the space in the heating chamber where the chiyoke structure is installed does not have a heater, causing uneven distribution during oven cooking. By configuring the heater to cover the chiyoke structure, uneven distribution during oven cooking can be eliminated. Furthermore, by making the wall dimension parallel to the heater, the effective area within the heating chamber will not be reduced.

In the figure, 5 is a fan, 6 is a door provided in the opening 7, and 8 is a lower heater.

As explained above, the present invention provides a high-frequency heating device with a heater that stably provides the most important cooking performance by providing a chiyoke structure within the heating chamber, and also achieves miniaturization. Not only has it become a product that can be used in any space, but it can also significantly reduce transportation costs and material costs.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a conventional high-frequency heating device with a heater, FIG. 2 is an enlarged front sectional view of the same, FIG. 3 is a side sectional view of a high-frequency heating device with a heater according to an embodiment of the present invention, and FIG. The figure is a top sectional view of the heating chamber.
FIG. 5 is an enlarged front sectional view of FIG. 3. 3... Heating chamber, 4... Heated object, 6... Door, 9
...Heater, 12...Chiyoke structure.

Claims (1)

[Claims] 1. A main body having a heating chamber for accommodating an object to be heated inside, a door provided to be openable and closable for taking the object to be heated into and out of the heating chamber, and a high-frequency oscillator that generates a high-frequency output to be supplied into the heating chamber. , comprising a heater provided in the heating chamber, a yoke structure that prevents leakage of high frequency waves to the terminal portion of the heater, and a heater holder that holds the tip of the heater, and the yoke structure is mounted on the wall of the heating chamber. The terminal part of the heater is fixed in the heater holder, the tip part is held by a heater holder, and the heater is attached in a shape that covers the chiyoke structure from the tip of the chiyoke structure toward the wall of the heating chamber where the chiyoke structure is attached. High frequency heating device.