JPH04295521A - Device for thermal cooking - Google Patents

Abstract

PURPOSE:To provide an apparatus for high-frequency heating whose use is free from impairment of a halogen lamp in service life and from danger of bodily burns, etc. CONSTITUTION:A reflecting box 9 attached to a heating chamber 2 with an insulating spacer 11 therebetween contains a halogen lamp 6 on the outer side of a punched metal plate 2a set in a wall of the heating chamber 2 and has a transparent glass plate 10 for closure over the punched metal plate 2a. This structure keeps the halogen lamp 6 from direct contact with the cooling air for cooling the high-frequency oscillator 3 so that temperatures over 250 deg.C, on which the halogen cycle is conditional, can be secured and, moreover, the spacer 11 mentioned above prevents transmission of heat from the glass plate 10 to the punched metal plate 2a and its heating to high temperatures.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a heating cooking device.
In particular, it concerns the installation of lamps that illuminate the inside of the heating chamber.

0002

BACKGROUND OF THE INVENTION Conventionally, incandescent lamps have been used in cooking devices such as high-frequency heating devices to illuminate the inside of the heating chamber, but there has been a problem in that the amount of light is low and it is difficult to see the inside of the heating chamber. Recently, halogen lamps have started to be used instead of incandescent lamps. The halogen lamp will be explained below.

[0003] Halogen lamps use quartz tubes as bulbs,
This lamp contains a tungsten filament and halogen gas, and has a larger amount of light and a longer life than an incandescent light bulb. Usually, incandescent light bulbs use a tungsten filament with a high melting point, but tungsten already begins to evaporate below its melting point, causing the filament to become thinner and eventually break. This is the natural lifespan of an incandescent light bulb. In order to prevent such evaporation of tungsten, halogen lamps are filled with halogen gas. As a result, tungsten evaporated from the filament reacts with the halogen gas to generate a halogen compound gas. If the temperature of the quartz bulb is kept above 250℃, the compound gas will maintain that state and when it is brought near the filament, the high temperature will decompose the tungsten into halogen gas, and the tungsten will adhere to the filament.
The freed halogen gas can repeat the following reaction again. This series of cycles is called a halogen cycle, and it greatly reduces the thinning of the filament, making it possible to have a longer life than incandescent light bulbs.

The configuration of the mounting position of a conventional halogen lamp will be explained below with reference to FIGS. 3 and 4. FIG. 3 is a side view of the high-frequency heating device, and FIG. 4 is a top view thereof.

As shown in FIGS. 3 and 4, the main body 1 includes a heating chamber 2, a high-frequency oscillator 3 that sends high-frequency waves to the heating chamber 2, and a punching metal 2a provided on the wall of the high-frequency oscillator 3 and the heating chamber 2. air guide 7 that connects air guide 7 and air guide 7
It consists of a halogen lamp 6 with a reflecting box. Further, the air for cooling the high frequency oscillator 3 is taken in by a fan motor 4 with a propeller fan 5 through an intake opening 1a provided in a part of the rear wall of the main body 1, and the air after cooling the high frequency oscillator 3 is passed through an air guide. 7, the gas is introduced into the heating chamber through a punching metal 2a provided on a wall of the heating chamber 2, and then exhausted through an exhaust opening 2b provided on a separate wall of the heating chamber 2.

[0006]

[Problems to be Solved by the Invention] However, in the above configuration, as shown in FIGS. 3 and 4, the halogen lamp is installed in the air passage, so the temperature of the quartz bulb must be maintained at 250° C. There was a problem that it was difficult to do so and the lifespan was shortened.

Furthermore, since the temperature of the quartz bulb is high, the surface temperature of the wall of the heating chamber 2 and the punching 2a also becomes high.
If you accidentally touch it while cleaning, there is a risk of burns.

The present invention solves these conventional problems, and provides a high-frequency heating device that has a simple configuration, can ensure the long life characteristic of halogen lamps, and can also prevent risks such as burns. It is intended to.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the high frequency heating device of the present invention closes a reflection box housing a halogen lamp with a transparent plate, which is located outside of a punched metal provided on the wall surface of a heating chamber. In addition, a spacer was inserted between the transparent plate and the wall surface of the heating chamber to provide heat insulation.

0010

[Function] The high-frequency heating device of the present invention can maintain the bulb temperature of the halogen lamp at 250°C or higher by closing the halogen lamp housed in the reflection box with a transparent plate, so the halogen cycle can be performed efficiently. Prevents filament thinning and ensures long life of halogen lamp. Furthermore, since a spacer is inserted between the heating chamber wall surface and the transparent body to provide heat insulation, it is possible to prevent the temperature of the heating chamber wall surface and the punching metal from rising, thereby preventing the risk of burns.

[0011]

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

As shown in FIG. 2, a heating chamber 2 is provided inside the main body, a high frequency oscillator 3 is provided in the heating chamber 2, and a fan 8 is provided at the rear lower part of the heating chamber 2. Air is taken in by a fan 8 through the opening 1a, cools electrical components such as the high-frequency oscillator 3, and then exhausted through an exhaust opening 1b provided in a separate wall of the main body 1.

Punching metal 2 provided on the wall of heating chamber 2
A halogen lamp 6 housed in a reflection box 9 is attached to the outside of a, through a heat-resistant transparent glass 10 such as crystallized glass, and the light from the halogen lamp 6 passes through the opening in the punching metal 2a. The inside of the heating chamber 2 is illuminated.

As shown in FIG. 1, a transparent glass 10 is attached so as to close a reflection box 9 in which a halogen lamp 6 is housed, and a punching provided on the wall of the heating chamber 2 is connected to a heat insulating spacer 11. The configuration is such that a gap is provided between the metal 2a and the metal 2a.

Note that the spacer 11 is made of ceramic wool or ceramic board, which has a heat insulating effect.

In this embodiment, since the reflective box 9 in which the halogen lamp 6 is housed is closed by the transparent glass 10,
Although the lead wire 6b of the halogen lamp is cooled by the wind from the fan, the quartz tube itself is not directly exposed, so the temperature of the quartz tube can be maintained at 250° C. or higher. Therefore, the halogen cycle can be carried out properly and a long life can be ensured.

[0017] Also, the spacer 11 allows the transparent glass 1 to
0 and the punching metal 2a of the heating chamber 2, it is possible to prevent the temperature of the wall of the heating chamber 2 and the punching metal 2a from rising, thereby preventing risks such as burns. In addition, although the case where transparent glass was used was described in this embodiment, a transparent body made of heat-resistant plastic or ceramic other than transparent glass may be used.

[0018] Similar effects can also be obtained by using a high-frequency heating device with an electric heating device. Furthermore, although the halogen lamp has been described as a tubular lamp, it is not limited to this shape.

[0019]

[Effects of the Invention] As described above, according to the high frequency heating device of the present invention, the following effects can be obtained.

1) Since the reflection box containing the halogen lamp is closed with a transparent plate, the halogen lamp is not exposed to direct wind and the bulb temperature can be maintained at 250°C or higher, allowing the halogen cycle to function properly and ensuring long life. I can do it.

2) Since the halogen lamp and the heating chamber are isolated from each other by a transparent material, moisture, salt, etc. from foods, etc., do not come into direct contact with the halogen lamp, thereby preventing the halogen lamp bulb from becoming dirty.

3) A spacer is inserted between the transparent body and the heating chamber wall to provide insulation, which prevents the temperature of the heating chamber wall and punching metal from rising due to the heat of the transparent body, which becomes high temperature due to light absorption from the halogen lamp, and prevents burns, etc. Danger can be prevented.

4) In a high-frequency heating device with an electric heating device, if a spacer with an insulating effect is used between the transparent plate and the heating chamber wall, it is possible to prevent hot air from the punching metal, thereby preventing uneven heating of the food and improving cooking. Performance improvements can also be measured.

[Brief explanation of the drawing]

[Fig. 1] A sectional view of the main part of the halogen lamp mounting part of the high-frequency heating device in one embodiment of the present invention.

[Fig. 2] Side cross-sectional view of a high-frequency heating device in an embodiment of the present invention.

[Figure 3] Side cross-sectional view of a conventional high-frequency heating device

[Figure 4] Top cross-sectional view of a conventional high-frequency heating device

[Explanation of symbols]

2 Heating chamber 2a Punching metal 3 High frequency oscillator (heating source) 6. Halogen lamp 9 Reflection box 10 Transparent plate 11 Spacer

Claims (1)

[Claims] 1. A heating chamber for storing food, a heating source for heating the food in the heating chamber, a punching metal provided on a part of the wall surface of the heating chamber, and a heating source provided corresponding to the punching metal. A halogen lamp that illuminates the room; a reflection box that is provided to cover the halogen lamp and reflects the irradiated light into the heating chamber; and a reflection box that is provided between the halogen lamp and the punched metal on the wall of the heating chamber. 1. A heating cooking device comprising a transparent plate having a transparent plate and a heat insulating spacer provided between the punched metal and the transparent body.