JPH07310931A - Heating cooking apparatus - Google Patents

Abstract

PURPOSE:To provide a heating cooking apparatus to effect efficient illumination when a substance to be heated is placed in a heating chamber. CONSTITUTION:An opening part 23 for illumination and a transparent plate 24 are arranged approximately vertically to a line for interconnecting the central part of a rotary stand 28 and the central part of an electric lamp 25. Since this constitution causes the light flux area of the electric lamp 25 to maximize for illumination for a substance 29 to be heated, whereby the substance 29 to be heated is neatly and brightly illuminated and a progressing state of cooking is easily recognized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker such as a microwave oven and an electric oven.

[0002]

2. Description of the Related Art Conventionally, in a heating cooker such as a microwave oven or an electric oven, an incandescent bulb lamp having a socket or an incandescent bulb integrated with the socket (actually, for illuminating the food being cooked or the heating chamber during cleaning). Fairness 2-333930
However, the incandescent bulb lamp cannot irradiate the inside of the heating chamber effectively with a general mounting structure because of its small amount of light.

A conventional example will be described below with reference to FIG. FIG. 3 is a cross-sectional view of a heating cooker of a type that uses radio waves as a heat source in a microwave oven.

As shown in FIG. 3, a door 2 is provided on the front surface of the heating chamber 1 so as to be openable and closable. Waveguide 3 in heating chamber 1
And a magnetron 4 which is an oscillator is attached. Radio waves from the magnetron 4 are radiated into the heating chamber 1 via the waveguide 3 to heat the object to be heated 5 by radio waves. The heating state of the object to be heated 5 can be seen through the see-through portion 6 provided on the door 2. The heating chamber 1 is provided with a lighting device 7 and has a structure for irradiating the object 5 to be heated from the outside.

An opening 9 is provided in a part of the wall surface 8 of the heating chamber and is sealed with a transparent band 10. A lighting device 7 including an incandescent lamp is provided facing the opening 9.

FIG. 4 shows another conventional example, which is an example of a heating cooker using radio waves in a microwave oven, and is a front sectional view.

A magnetron 4 that oscillates radio waves is attached to the right side surface of the heating chamber 1 to heat the object 5 to be heated in the heating chamber 1 by radio waves. The heating chamber 1 is provided with an air guide 11 that guides the cooling air that has cooled the magnetron 4 into the heating chamber 1.
Cooling air is sent into the heating chamber 1 through the opening 9 provided on the right side surface. The incandescent lamp, which is the lighting device 7, is installed in the air guide 11 and illuminates the object to be heated 5 from the opening 9.

[0008]

However, in such a structure, as shown in FIG. 3, most of the illuminated portion of the heating chamber 1 by the lighting device 7 is close to the door 2, and the portion to be heated 5 of the object 5 to be heated. Since there is no illumination from the center to the back, there is a drawback that it is difficult to confirm the progress of cooking of the article to be heated 5. In addition, since no reflector is attached to the upper surface of the lighting device 7, light cannot be reflected efficiently into the heating chamber 1, making it more difficult to see.

Also in the conventional example shown in FIG. 4, since the inside of the heating chamber 1 is illuminated from the rear side of the heating chamber 1, only the rear side of the object 5 to be heated is illuminated and the front side of the door 2 is shaded. Will end up. Therefore, even in such a configuration, there is a problem that the progress of cooking is difficult to understand.

Therefore, the first object of the present invention is to efficiently illuminate the central portion of the heating chamber of the lighting device.

A second object of the present invention is to provide a heating cooker capable of efficiently illuminating an object to be heated even with a lighting device such as an incandescent lamp having a small amount of light.

[0012]

In order to achieve the first object, the heating cooker according to the present invention comprises a heating chamber for accommodating food in the main body, a rotary table on which food is placed, and a see-through part. And a lighting device, the lighting device is a translucent opening provided on the upper wall surface of the heating chamber, a transparent plate provided on the upper surface of the opening, a lighting bulb, and a reflector. The opening of the upper wall surface of the heating chamber is provided so as to be substantially perpendicular to a line connecting the central portion of the rotary table and the central portion of the lighting bulb.

In order to achieve the second object, the reflector of the present invention has a semi-cylindrical shape as much as possible outside the line connecting the central portion of the rotating table in the heating chamber and the central portion of the lighting bulb. The lighting bulb is fixed to the reflecting plate, and the reflecting plate is provided with tabs for pressing the transparent plate so that both side surfaces are open.

[0014]

In the heating cooker of the present invention, the opening on the upper wall of the heating chamber and the transparent plate are provided at an arbitrary angle connecting the lamp and the center of the turntable so as to irradiate the center of the turntable. The luminous flux area that can be applied to the object can be maximized, and the illumination can be performed cleanly and efficiently, and the progress of cooking can be easily confirmed.

Further, since the reflector is formed in a semi-cylindrical shape outside the line connecting the center of the turntable and the center of the light bulb, the reflection of the light beam can be concentrated in the center, so that even a lamp with a small amount of light can be efficiently illuminated. You can do it.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A heating cooker according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial sectional view showing an illuminating device for a heating cooker according to the present invention. In FIG. 1, the heating chamber 21
A door 22 is provided on the front of the so as to be openable and closable. An opening 23, which is a lighting device, is provided on the upper wall surface of the heating chamber 21, and a transparent plate 24 made of heat-resistant glass or the like is sealed. Opening 2
An incandescent lamp 25 having a built-in filament, which is a light emitting portion, is provided facing the lamp 3. The waveguide 2 is provided on the upper wall surface of the heating chamber 21.
A magnetron 27, which is an oscillator, is attached via 6. Radio waves from the magnetron 27 are radiated into the heating chamber 21 via the waveguide 26, and the object 29 to be heated placed on the rotary table 28 is heated by radio waves.

The opening 23 and the transparent plate 24 are provided so as to be perpendicular to the line connecting the center of the incandescent lamp 25 and the turntable 28, which is the illuminating device. A reflecting plate 30 for fixing the incandescent lamp 25 is provided on the upper surface of the heating chamber 21.
The object to be heated 29 inside is illuminated.

FIG. 2 is an enlarged partial sectional view of a portion of the lighting device of the heating cooker according to the present invention.

In FIG. 2, the incandescent lamp 25, the opening 23, and the transparent plate 24, which are the illuminating device, are as described above. The incandescent lamp 2 is mounted on the reflector 30 provided on the upper surface thereof.
5 is fixed with screws 32. The reflecting plate 30 is shaped as semi-cylindrical as possible on both sides of the line connecting the incandescent lamp 25 and the center of the turntable 28, so that the luminous flux emitted from the incandescent lamp 25 is heated in the heating chamber. 21
Can be concentrated in the central part of. Also, the reflector 30
By providing the tabs 31 by cutting and raising the transparent plate 2
It is configured to hold 4.

Since the incandescent bulb lamp 25 is mounted on the upper wall surface of the heating chamber 21, the temperature of the incandescent bulb lamp 25 becomes high in the device for heating the heater, and the heat-resistant temperature limit of the insulator holding the terminal is increased. Over the lamp 2
The life of 5 becomes short. Therefore, if both side surfaces of the reflecting plate are opened, the self-heating of the incandescent lamp 25 and the heat generated by heating the heater can be dissipated, and the lighting device can be made safe and have a long life.

As described above, according to this embodiment, by providing the opening 23 and the transparent plate 24 perpendicularly to the line connecting the incandescent bulb lamp 25 and the center of the turntable 28, the turntable 2
Since the luminous flux area of the incandescent lamp 25 is maximized with respect to the object to be heated 29 placed on the object 8, the object to be heated 29 can be illuminated cleanly and efficiently, and the progress of cooking can be easily confirmed.

Further, by making at least the door 2 side of the reflecting plate 30 semi-cylindrical, the light beam can be concentrated in the central portion, and the effect can be obtained even with a lamp having a small light amount.

Further, if the incandescent lamp 25 is attached to the reflecting plate 30 and the tab 31 for pressing the transparent plate 24 is provided, the contact between the incandescent lamp 25 and the transparent plate 24 can be avoided, so that the lamp is prevented from cracking. One part can play many roles, such as being able to do it.

In the present embodiment, the case where the transparent plate 24 provided in the opening 23 is also arranged so as to be perpendicular to the line connecting the central portions of the incandescent lamp 25 and the turntable 28 has been described. The plate 24 is not limited to this as long as it has a shape that covers the opening 23.

[0026]

As described above, in the heating cooker of the present invention, the following effects can be obtained.

(1) An incandescent lamp for an object to be heated placed on the turntable is provided by providing an illumination opening perpendicular to the line connecting the incandescent lamp which is the lighting device and the center of the turntable. Since the luminous flux area of the bulb lamp is maximized, the object to be heated can be illuminated cleanly and efficiently, and the progress of cooking can be easily confirmed.

(2) By making the shape of the reflecting surface of the reflecting plate as semi-cylindrical as possible, the light flux can be concentrated on the central portion of the object to be heated, and bright illumination can be achieved even with a lamp with a small light quantity.

(3) If the incandescent lamp is attached to the reflector and the tabs for pressing the transparent plate are provided, the contact between the lamp and the transparent plate can be avoided, so that the lamp can be prevented from cracking.

(4) If both side surfaces of the reflector are left open, the heat around the lamp can be dissipated, and a highly reliable, safe and long-life lighting device can be provided.

As described above, according to the present invention, it is possible to provide a heating cooker equipped with an illuminating device having a large number of effects with a single component, while being capable of efficiently illuminating with a simple structure.

[Brief description of drawings]

FIG. 1 is a side sectional view of a heating cooker according to an embodiment of the present invention.

FIG. 2 is a sectional view of the main part of the heating cooker.

FIG. 3 is a side sectional view of another conventional heating cooker.

FIG. 4 is a side sectional view of another conventional cooking device.

[Explanation of symbols]

 21 heating chamber 23 opening 24 transparent plate 25 incandescent lamp 29 object to be heated 30 reflector plate 31 tab

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takahiko Yamazaki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Yasuhisa Mori, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A heating chamber for accommodating food in a main body, a rotating table for placing food, a door having a see-through portion, and a lighting device, the lighting device being provided on an upper wall surface of the heating chamber. It has a translucent opening, a transparent plate provided on the upper surface of the opening, a lighting bulb, and a reflecting plate, and the opening of the heating chamber upper wall surface has a central portion of the turntable and the lighting bulb. A heating cooker configured so as to be substantially perpendicular to the line connecting the central parts of the. 2. The reflecting plate has a semi-cylindrical shape as far as possible outside the line connecting the center of the rotating table in the heating chamber and the center of the lighting bulb, and the lighting bulb is fixed to the reflecting plate. The cooking device according to claim 1, wherein the reflecting plate is provided with tabs for pressing the transparent plate, and both side surfaces are open.