JPH10132294A - High frequency heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the leakage of radio waves from a clearance part of a door by providing a salt water filled body absorbing the radio waves along the periphery of the door and the periphery of an opening of a heating chamber facing it. SOLUTION: In a high frequency thermal cooker, a door 2 is mounted on the front of a heating chamber 1 and has a frame body 5 in the perimeter of a door plate 3. An annular tube 8 filled with salt water 7 is mounted inside the frame body 5 to form a salt water filled body. The tube 8 comprises an elastic material such as vinylchloride resin and is provided with an injection port and a drain port of the salt water 7. In this manner, as the circular tube 8 filled with the salt water 7 is provided inside the door 2, with the closing of the door 2, the salt water 7 is positioned at a possible clearance, the radio waves are absorbed by the salt water 7 thereby preventing the leakage of the radio waves from the clearance part of the door 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing radio waves from leaking from a gap between doors in a high-frequency heating cooker such as a microwave oven.

[0002]

2. Description of the Related Art In a microwave oven, there is a problem that a radio wave generated from a magnetron leaks outside through a gap between doors.

[0003]

In order to prevent such a radio wave from leaking from a gap portion of a door, for example, in the related art, a ferrite is provided along an inner peripheral edge of a door provided at a front opening of a heating chamber. A packing made of an elastic material in which is mixed is attached, and the packing absorbs radio waves.

[0004] However, there is a problem in that it takes much time and cost to manufacture a packing in which ferrite is mixed.

The present invention has been made in view of the above circumstances, and has as its object to prevent the leakage of radio waves from a gap in a door with a simple configuration.

[0006]

According to the first aspect of the present invention, a salt water-filled salt-absorbing material is provided between a peripheral edge of a door and a peripheral edge of a front opening of a heating chamber opposed to the peripheral edge of the door. The body was provided.

According to the second aspect of the present invention, a tube made of an annular elastic material filled with salt water is attached along the inner peripheral edge of the door provided at the front opening of the heating chamber.

According to each of the above-described aspects of the present invention, the radio wave is absorbed by the salt water, thereby preventing the radio wave from leaking from the gap portion of the door.

In particular, according to the second aspect of the present invention, since the tube has elasticity and is filled with salt water and is very easy to deform, the tube is in close contact with the gap of the door. It is in a state where it is located and seals the gap, whereby leakage of radio waves can be reliably prevented.

Further, in the invention according to the second aspect, by adopting a structure in which the tube is provided with an inlet and an outlet for the salt water (the invention according to the third aspect), the salt water can be injected and discharged. It is also possible to adopt a configuration in which the radio wave absorption rate can be changed by changing the concentration of salt water (the invention according to claim 4).

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a cross-sectional view of a microwave oven, which is a high-frequency cooking device according to the present invention, as viewed from the side, and FIG.

In FIG. 1, reference numeral 1 denotes a heating chamber, on the front of which a door 2 is mounted. The door 2 has a frame 5 attached around a door plate 3, and an annular tube 8 filled with salt water 7 is attached along the inner peripheral edge of the frame 5. The salt water 7
The annular tube 8 filled with is composed of a salt water-filled body. The tube 8 is made of an elastic material such as a vinyl chloride resin.
Each of the outlets 11 is provided, and each is plugged.

As described above, the annular tube 8 filled with the salt water 7 is provided inside the door 2, so that the door 2
When is closed, the salt water 7 is located in the gap, and the salt water 7 absorbs radio waves. Thereby, the leakage of the radio wave from the gap portion of the door 2 is prevented.
In particular, since the tube 8 has elasticity and is filled with the salt water 7 and is very easily deformed,
The door 2 is positioned in close contact with the gap and seals the gap, thereby reliably preventing radio wave leakage.

FIG. 3 is a graph showing the correlation between the concentration of the salt water 7 and the radio wave absorptivity, that is, the concentration of the salt water 7 can be appropriately changed so as to obtain a desired radio wave absorptivity. In this case, the salt water 7 having an appropriate concentration is taken in and out through the inlet 10 and the outlet 11.

[0015]

According to the present invention, it is possible to prevent radio waves from leaking from gaps between doors of a microwave oven or the like with a simple structure.

[Brief description of the drawings]

FIG. 1 is an abbreviated cross-sectional view of a microwave oven that is a high-frequency heating cooker according to an embodiment of the present invention when viewed from a side.

FIG. 2 is a simplified view showing the inner surface of a microwave oven which is a high-frequency cooking device according to the present invention.

FIG. 3 is a graph showing the correlation between the concentration of salt water and the radio wave absorption rate.

[Explanation of symbols]

 1 heating room 2 door 7 salt water 8 tube

Claims (4)

[Claims] 1. A high-frequency heating cooker provided with a salt water-filled body that absorbs radio waves, between a periphery of a door and a periphery of a front opening of a heating chamber facing the periphery of the door. 2. A high-frequency heating cooker in which a tube made of an annular elastic material filled with salt water is attached along an inner peripheral edge of a door provided at a front opening of a heating chamber. 3. The high frequency heating cooker according to claim 2, wherein the tube is provided with an inlet and an outlet for the salt water. 4. The high frequency heating cooker according to claim 3, wherein the radio wave absorption rate is changed by changing the concentration of the salt water.