JP2002093571A - Door shielding structure of microwave heating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to obtain a double shielding effect of a shielding material with a choke and metal mesh packing which are prepared in a back side of a door main body. SOLUTION: A door shielding structure of a microwave heating equipment is equipped with, the door main body for opening and closing an opening of the microwave heating equipment, the shielding material with a choke attached in the door main body at a position where the door can approach near along substantially all inner circumference of the face of the door opening when the door main body are in the closed state, and the metal mesh packing attached in the door main body at the position where the door can approach near along substantially all inner circumference of the face of the door opening when the door main body are in the closed state. The metal mesh packing can also prevent leakage of a hot blast, and since its heat-resisting property is also high, it does not degrade by using over a long period of time, either.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door shield structure of a microwave heating device such as a microwave oven and an oven, and more particularly to a door shield structure of a microwave heating device using hot air heating.

[0002]

2. Description of the Related Art Conventionally, in microwave heating devices such as microwave ovens and ovens, various measures have been taken for a shield structure of a door in order to prevent various adverse effects caused by leakage of microwaves to the outside. I have.

[0003] In recent years, microwave heating apparatuses that use hot air heating in combination with the purpose of quickly cooking foods and imparting a beautiful baking color have been proposed and used.

[0004]

Many of the conventional door shield structures of this kind can exhibit a certain effect only from the viewpoint of preventing microwave leakage. However, when these are directly applied to a microwave heating device using hot air heating together, it is not possible to sufficiently cope with blowing out hot air to the outside. Conventionally, door packings were provided, but many of these door packings were made of a material such as silicon rubber and could not withstand strong hot air. In addition, the conventional door packing only considers mechanically close contact with the peripheral surface of the opening of the heating device, and does not perform the function of preventing microwave leakage. Did not. Therefore, even if the door packing is provided separately from the microwave shielding material, the microwave shielding effect is not improved.

Further, the conventional door shield structure does not consider that the glass of the door is easily attached or replaced when the door is broken, and therefore has a problem in terms of maintenance management. Was.

[0006] It is an object of the present invention to provide a door sheet structure of a microwave heating apparatus which can solve the above-mentioned problems of the prior art.

[0007]

SUMMARY OF THE INVENTION A shield structure of a microwave heating device according to the present invention includes a door body for opening and closing an opening of the microwave heating device, and a door body for closing the opening. A shield member with a choke attached to the door body at a position which can be substantially along the entire inner peripheral surface of the opening, and when the door body is in a state where the opening is closed, A metal mesh packing material attached to the door body at a position where the outer peripheral surface of the opening can be in close contact with substantially the entire outer peripheral surface thereof.

According to one embodiment of the present invention, the choke-equipped shield member is detachable from the door body.

According to another embodiment of the present invention, the metal mesh packing material is detachable from the door body.

According to yet another embodiment of the present invention,
The microwave heating apparatus uses hot air heating in combination.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in more detail with reference to the accompanying drawings according to embodiments and examples of the present invention.

FIG. 1 is a front view of a microwave heater combined with hot air heating to which a door shield structure according to an embodiment of the present invention is applied, and FIG. 2 is an open / closed state of a door of the microwave heater of FIG. FIG. 4 is a partial plan view showing in an easy-to-understand manner. As is well shown in FIGS. 1 and 2, in this embodiment, an opening is provided on the front surface of the housing main body 1 of the microwave heating device so that an object to be heated such as food can be taken in and out of the refrigerator. Door 2 for opening and closing this opening
Are attached to the housing body 1 by using an appropriate hinge member 3. FIG. 2 shows the closed state of the door 2 by a solid line and the open state of the door 2 by a dashed line. In addition,
A table for placing an object to be heated such as foodstuffs is provided at the bottom of the inside of the housing which is the inside of the housing main body 1 of the microwave heating apparatus of this embodiment, and the table is provided at the top thereof. A microwave generator for irradiating microwaves to the object to be heated placed thereon and a hot air generator for blowing strong hot air are provided. However, these detailed structures and arrangements are not directly related to the present invention, and will not be described in further detail.

FIG. 3 shows the door 2 of the microwave heating apparatus of FIG.
4 is an exploded perspective view of an exploded part of the door 2. FIG. As is well shown in FIG.
As described later, the door front plate 200 and the lining 20 are mainly used.
1. A shield member 210 with a choke and a metal mesh packing 220 which are detachably attached to a door body composed of a door rear plate 202, a door inner frame 203, and a choke plate attachment frame 204. Chalk shield material 2
Reference numeral 10 denotes a housing body 1 with the door 2 closed.
Is attached to the back side of the door body at a position where it can enter the interior of the housing defined by the above and can approach along the entire inner peripheral surface 11 of the opening 10 of the housing body 1. On the other hand, when the door 2 is closed, the metal mesh packing 220 is attached to the outer peripheral surface 12 of the opening 10 of the housing body 1.
Is attached to the inner surface of the door body at a position where the door can be in close contact with the entirety of the door.

Therefore, there is very little possibility that the microwave applied to the inside of the refrigerator is substantially absorbed by the shield member 210 with a choke near the opening 10 and leaks out of the opening 10. Further, even if microwaves are not absorbed by the shield member 210 with a choke but reach the metal mesh packing 220, the microwaves are absorbed by the metal mesh packing 220, so The possibility that the irradiated microwave leaks out of the refrigerator is further reduced. On the other hand, hot air blown into the refrigerator (for example,
(At a temperature of about 400 ° C.), since the metal mesh packing 220 is in close contact with the outer peripheral surface 12 of the opening 10 of the housing body 1, there is no possibility that the metal mesh packing 220 is blown out of the refrigerator. And since the metal mesh packing 220 has high heat resistance, it does not deteriorate even by using hot air for a long time.

Next, the structure of each component of the door 2 and an assembling method will be described in detail with reference to FIG.

First, the door front plate 200 is attached to the front glass retainer 2.
05B, the front glass 205 with the packing 205A attached to the periphery and the rear glass holder 205C are received in a stacked state, and further, the lining 201 is received. The flange 203A of the door inner frame 203 is attached and fixed to the lining 201 by an appropriate method such as welding. Screw holes are formed at corresponding positions on the outer peripheral frame of the door front plate 200 and the lining 201, respectively.
By screwing 0A into each screw hole, they can be integrated with each other. At this time, the front glass 205 is hermetically fixed thereto by the front and rear glass presses 205B and 205C and the packing 205A so as to be sandwiched between the door front plate 200 and the lining 201.

Next, the metal mesh packing 220 will be described. As an embodiment of the present invention, the metal mesh packing 220 may use, for example, a wire mesh manufactured by Kitagawa Industry Co., Ltd. as the packing. Since this wire mesh is excellent in elasticity and resilience, a reliable shielding effect can be obtained even if the mounting contact portion is not smooth, and also has high heat resistance. As the metal wire forming the wire mesh, Monel is used as a standard product, but tin-plated copper or copper weld (tin-plated copper / steel) may be used.
As shown in FIG. 4, the metal mesh packing 220 of this embodiment includes a flat portion 220A extending from the bottom surface of the inner annular portion having a circular cross section to the outer periphery.

The metal mesh packing 220 is mounted on the outer periphery of the annular projection 221A of the front mesh packing retainer 221. Furthermore, the rear mesh packing presser 22
2 to the flat portion 220A of the metal mesh packing 220.
Are assembled so as to be sandwiched between the front mesh packing retainer 221 and screws (not shown) are screwed into the corresponding screw holes, whereby the front mesh packing retainer 221, the metal mesh packing 220, and the rear mesh packing 220 are screwed. The presser 222 is integrated, and the metal mesh packing 220 is removable in such an integrated form. The back side of the annular convex portion 221A of the front mesh packing retainer 221 (lining 20)
On the side facing 1), a flange 204A of the choke plate mounting frame 204 is mounted and fixed by an appropriate method such as welding.

The front mesh packing holder 221, the metal mesh packing 220, and the rear mesh packing holder 22
2 is inserted around the door inner frame 203 so as to be aligned with the lining 201, and further, the door rear plate 202 is overlapped, and screws 202A are inserted into the corresponding screw holes.
, The metal mesh packing 220 and the choke plate attachment frame 204 are attached and fixed to the door body.

Next, the heat-resistant glass 2 is attached to the choke plate mounting frame 204 fixed as a part of the door body.
06, microwave shield punching plate (net-like) 207
The shield member 210 with a choke is detachably attached and fixed by screwing a shield plate fixing screw 210A into a corresponding screw hole. At this time, the heat-resistant glass 206 and the microwave shield punched plate 2
The outer peripheral edge of 07 is accommodated and fixed in the receiving annular concave portion 204B formed on the inner peripheral edge of the choke plate mounting frame 204. Therefore, by removing the screw 210A from the screw hole, the heat-resistant glass 206, the microwave shield punching plate 207, and the shield material 210 with a choke are removed.
Can be easily removed from the door body, and can be easily replaced or cleaned.

The shielded material with a choke used in the present invention is not limited to a metal frame having a groove having a predetermined shape and dimensions so as to prevent leakage of microwave energy in a predetermined frequency range. Includes any shielding material that can prevent leakage of microwave energy in the frequency range.

[0022]

According to the present invention, a double shield effect of the shield material with the choke provided on the back side of the door body and the metal mesh packing can be obtained, so that the leakage of the microwave can be completely prevented.

The metal mesh packing can prevent leakage of hot air and has high heat resistance, so that it does not deteriorate even if it is used for a long period of time.

Since both the choke shield material and the metal mesh packing can be made removable,
Maintenance management becomes easy.

[Brief description of the drawings]

FIG. 1 is a front view of a microwave heating apparatus combined with hot air heating to which a door shield structure as one embodiment of the present invention is applied.

FIG. 2 is a partial plan view showing an open / closed state of a door of the microwave heating device of FIG. 1 for easy understanding.

FIG. 3 is an enlarged sectional view of a portion of a door of the microwave heating device of FIG. 1;

FIG. 4 is an exploded perspective view of a disassembled part of a door of the microwave heating apparatus of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing main body 2 Door 3 Hinge member 10 Opening 11 Inner peripheral surface of opening 12 Outer peripheral surface of opening 200 Door front plate 201 Lining 202 Door back plate 203 Door inner frame 204 Chalk plate mounting frame 205 Front glass 206 Heat resistant glass 207 Microwave Shield punching plate 210 Shield material with chalk 220 Metal mesh packing

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigemitsu Aota 1-7-20 Togoshi, Shinagawa-ku, Tokyo Taniko Co., Ltd. F-term (reference) 3K090 GA01 GA04 GA05 JB01 JB04 JD04 3L086 AA03 BA07 BC06 BC07 DA02 DA07 DA16 DA23 DA29

Claims (4)

[Claims] 1. A door body for opening and closing an opening of a microwave heating device, and a door body which is close to and substantially along the entire inner peripheral surface of the opening when the door body is in a state where the opening is closed. Where possible, the shielded material with the choke attached to the door body can be in intimate contact along substantially the entire outer peripheral surface of the opening when the door body is in the closed state. And a metal mesh packing material attached to the door main body at a position. 2. The shield member with a choke is detachable from the door body.
A door shield structure for a microwave heating device according to item 1. 3. The metal mesh packing material is detachable from the door body.
Or the door shield structure of the microwave heating device according to 2. 4. The door shield structure for a microwave heating device according to claim 1, wherein the microwave heating device uses hot air heating in combination.