JPS6015113B2 - High frequency heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a high-frequency heating device that minimizes radio wave leakage between a shelf having a rising portion and a corpse.

Generally, in a high-frequency heating device, as shown in FIG. 1, a shelf board a having a rising portion at the surrounding area is placed above a shelf support b.

When a high frequency is oscillated, the high frequency is absorbed by the food c and also by the shelf board a. In particular, radio waves are easily absorbed around the rising part d of the shelf board a, and radio waves are likely to be concentrated around the rising part d of the shelf board a that brings the shelf board a closer to the door body e, and radio waves leak from the bottom of the door body e. The disadvantage is that it becomes large. Therefore, in the conventional high-frequency heating device, when the shelf board a containing the food c to be cooked is placed on the shelf board support b, the outer green of the rising part d of the shelf board a and the door body e are Since there was no means for maintaining the distance L at a constant value, some users could have placed the rising portion d in contact with the door e. This invention was made in consideration of the above-mentioned circumstances, and its purpose is to move the front end of a shelf board that has a raised part placed on the bottom of the heating chamber from the front plate of the heating chamber.
The present invention aims to provide a high-frequency heating device in which leakage of radio waves from between the shelf board and the door body is minimized by spacing them by five or more ribs.

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

In FIG. 2, reference numeral 1 denotes a heating chamber, and a door body 2 for closing an opening la of this heating chamber 1 is provided. On the heating chamber 1 side of the door body 2, a radio wave absorber 2a is provided along the green outer periphery, and a contact piece 2b is provided to surround the radio wave absorber 2a and connect the door body 2 and the heating chamber front plate. It is designed to prevent radio wave leakage from between the LB and the LB. In addition, the bottom plate 3 of the heating chamber 1
Shelf board supports 4 are provided on both sides. A shelf board 5 on which foods are placed is stacked on the top of the shelf support 4. The shelf board 5 is made of a glass material such as LL-2 (borosilicate-based low-loss glass). Furthermore, this shelf board 5 is provided with a rising portion 5a to prevent food broth from overflowing from the shelf board 5 and staining the inside of the heater 1. Further, a protrusion 4a is formed on the front side of the shelf support 4, and a protrusion 4a is formed on the front side of the shelf support 4.
The distance L between the outer peripheral edge 5b of the rising portion 5a and the heating chamber front plate lb is kept at 25 mm. Therefore, the above numerical value on the 25 side is based on an experiment to confirm the relationship between the distance L between the outer peripheral edge 5b of the rising portion 5a of the shelf board 5 and the heating chamber lb and the magnitude of radio wave leakage. , 3rd
By setting the distance L to 25 pigs or more as shown in the figure,
Radio wave leakage was reduced to 0.0 mw/ compared to the JIS standard value of 1.0 mw/.
This shows that it can be suppressed to 1 w/. The high-frequency heating device used in this experiment poured 275 cc of water onto the bottom plate 3 without using the shelf plate 5, and had a radio wave leakage of 0.1 kite w/ground and 0.1 cc of water when no load was applied. This causes a radio wave leak of 45 kites w/ground. In addition, the shelf board 5 is made of LL-2 (borosilicate-based low-loss glass) (with a dielectric constant of 4.8), and the high-frequency oscillation frequency used in the experiment was the one commonly used for high-frequency heating devices. 2450 MHz was used. Note that the shelf board 5 has a dielectric constant of 4.6 to 8.
．． It may be made of glass material having a mirror-like quality. As explained above, in this invention, the outer periphery of the rising part of the shelf board is separated by at least 25 cm from the front plate of the heating chamber, that is, the back surface of the door body, so that the outer periphery of the rising part of the shelf board and the door body are separated by at least 25 mm. Radio wave leakage between the two can be minimized.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view of a general high-frequency heating device, Fig. 2 is a longitudinal side view of the main part of an embodiment of the present invention, and Fig. 3 is a diagram showing the distance between the shelf board and the heating chamber front plate and the radio wave leakage. It is a graph of experimental results showing the relationship with size. 1... Heating chamber, 5... Shelf board, 5a... Rising part, 5b.
・・・・・・Outer edge of shelf board. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. In a high-frequency heating device in which a shelf board having a rising portion at a peripheral portion is placed on the inner bottom of a heating chamber, and food is placed in the shelf board and cooked by heating, the shelf board is made of glass. A high-frequency heating device characterized in that the front end portion of the rising portion of the shelf board made of glass material is spaced apart from the front plate of the heating chamber by 25 mm or more. 2. Hold the front end of the rising part of the shelf board made of glass material at a predetermined position separated by 25 mm or more from the front plate of the heating chamber to prevent the shelf board from moving toward the front plate of the heating chamber. 2. The high-frequency heating device according to claim 1, wherein a protrusion is provided on the inner bottom of the heating chamber.