JPS6032767B2 - High frequency heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high frequency heating device with an improved radio wave leakage structure between the main body and the door body.

Since the shelf board housed in the high frequency heating chamber and on which the heated object is placed is removable, it can be slid in the front and rear directions unless a stopper or the like is provided on the shelf support part.

Therefore, the front end of the shelf board may be close to or in contact with the back surface of the door body, and high frequencies may be concentrated between the front end of the shelf board and the back surface of the door body. Furthermore, there is a danger that there is a lot of radio wave leakage from the lower part of the back surface of the door body (according to experiments, when the front end of the shelf board is in contact with the back surface of the door body, the radio wave leakage is 0.23 hw/). This invention was made in view of the above-mentioned circumstances, and its purpose is to provide protrusions on both sides of the front end of the shelf board that project toward the back surface of the door body, thereby providing a space between the shelf board and the door body. The present invention aims to provide a high-frequency heating device that can prevent radio wave concentration and reduce radio wave leakage. below,
This invention will be explained based on an embodiment shown in the drawings.

Reference numeral 1 in FIGS. 1 and 2 indicates a main body of the high-frequency heating device, and a high-frequency heating chamber 2 is provided inside the main body. A high frequency oscillator 4 such as a magnetron and a starch fan 5 are provided on the ceiling 3 of the high frequency heating chamber 2, and a shelf board 7, which will be described later, is removably mounted on the lower part 6. Then, an object to be heated 8 such as food is placed on this shelf board 7. In addition, the front part of the main body 1 is equipped with a high-frequency heating chamber 2.
A door body 10 that opens and closes the front opening 9 is hinged.
Further, the shelf board 7 is formed of a metal material into a rectangular shape, and the front end 7a has a door body 10 on both left and right sides.
Projecting portions 7b, 7b projecting toward the back surface are provided.

A notch 7c is formed between these protrusions 7b. These protrusions 7b and 70 are formed such that A>15 feet and B<3 feet, where A is the depth dimension and B is the width dimension. Therefore, when the shelf board 7 is mounted on the lower part 6 in the high-frequency heating chamber 2 and the door body 10 is closed, the protruding parts 7b, 7b of the shelf board 7 come close to or in contact with the back surface of the door body 10, and these protruding parts A space formed by a notch 7c is formed between 7b and 7b. Therefore, high frequencies are not concentrated between the front end of the shelf board 7 and the back surface of the door body 10, and radio wave leakage from the lower part of the door body 10 can be reduced. Figure 3 shows the experimental results of measuring the radio wave leakage from the lower part of the door body 10 when the depth dimension A of the protrusions 7b, 7b on the shelf board 7 is changed. ,
It can be seen that this decreases to about 1/2 of that when A=0 ribs.

Furthermore, if A is increased, it will be stabilized at about 0.09 hw/. Further, by setting the width dimension B of the protrusions 7b, 7b to 3 mm or less, radio wave leakage does not increase even if the protrusions 7b, 7b abut against the inner surface of the door body 10. In the above embodiment, a flat shelf board was described, but as shown in FIG.
If the protrusions 13, 13 are provided protrudingly on the shelf board 12 having 1,
The same effect is achieved.

As explained above, in this invention, since the protrusions that protrude toward the back surface of the door body are provided on both sides of the front end of the shelf board, a space is created between the back surface of the door body and the shelf board, and a space is created between the back surface of the door body and the back surface of the door body. Radio waves are never concentrated. Therefore, it is possible to reduce radio wave leakage from the lower part of the door body, and there is an effect that temperature distribution is improved. Furthermore, there is an effect that the shelf board can be positioned by the protrusion. A brief explanation of the drawings: Figure 1 is a vertical sectional side view showing one embodiment of the invention, Figure 2 is a perspective view of the shelf board, Figure 3 is a graph showing experimental results, and Figure 4 is a diagram showing the invention. It is a perspective view of the shelf board which shows another Example.

2... High frequency heating chamber, 7... Shelf board, 7b, 7b...
・Protrusion, 10... Door body.

O diagram Figure 2 3rd figure om diagram

Claims (1)

[Claims] 1. In a high-frequency heating chamber that is closed by a door and is provided with a shelf for placing objects to be heated, protrusions that protrude toward the rear surface of the door are provided on both sides of the front end of the shelf. A high-frequency heating device characterized in that a space is formed between the protruding parts, and the protruding parts have a depth dimension of 15 mm or more.