JPS6330887Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a high-frequency heating device that also has a hot air circulation oven function.

Conventional configurations and their problems So-called microwave ovens, which are built into high-frequency heating devices such as heaters, have been in the spotlight due to their multifunctionality and space-saving properties, and are currently the mainstream of high-frequency heating devices. Among them, the hot air circulation type microwave oven can reduce uneven baking even when the metal food tray is configured in multiple stages when heating the oven, so a large amount of food can be cooked in the oven at the same time. It became possible. Some of these hot air circulation ovens use a turntable inside the heating chamber to rotate the food tray to prevent uneven cooking, but the area ratio of the food tray in the heating chamber is Moreover, since the food trays are stacked on the turntable in two levels, it gives a sense of instability.

Therefore, a rail made of ceramic or the like is installed on the side wall of the heating chamber, and a rectangular food tray is placed on top of the rail.
Although there is a so-called fixed plate system that has improved the above-mentioned drawbacks, this generally causes uneven baking more easily than the turntable system. In particular, the area near the hot air vent installed in a part of the wall of the heating chamber has the highest temperature in the heating chamber, so if hot air is blown directly onto food placed near this area, local heating may cause significant unevenness in browning. There was a risk that this would occur. Therefore, as an example, in the heating chamber where the hot air vents are provided on the rear wall surface of the heating chamber, in order to avoid the food placement part of the food placement tray in the heating chamber part facing the hot air ventilation holes,
A method has been adopted in which hot air ventilation holes are provided at the peripheral edge of the rear wall of the heating chamber, and the food tray support portion of the rail extends from the side surface of the heating chamber. in this case,
Since the rail is made of an insulating material such as ceramic, it is not only easily broken and lacks durability, but also has the disadvantage that the effective area of the heating chamber is reduced due to the protrusion of the rail during high-frequency heating. On the other hand, with the method used in electric ovens, etc., in which the rail members are made of metal wire, although the above-mentioned drawbacks in durability can be overcome, the rails must be removed during high-frequency heating, making it difficult to use. Furthermore, if high-frequency heating was accidentally set while a food tray was stored in the heating chamber, sparks would be generated, and the resulting heat could cause burns, making it unsafe.

Purpose of the invention This invention solves the above-mentioned drawbacks of the conventional method. Even with a fixed plate method, there is less uneven cooking and it is easy to use.
The present invention also aims to provide a highly safe high-frequency heating device.

Structure of the invention In order to achieve the above object, the high-frequency heating device of the invention has a rail member made of an insulator such as ceramic, and further extends the peripheral edge of the side wall of the heating chamber of the food tray used during oven heating. This configuration has a configuration in which a hot air ventilation hole is provided in the peripheral edge extension portion, and the hot air ventilation hole is opposed to the peripheral edge extension portion, which has the effect of providing a high-frequency heating device that is easy to use with little unevenness in baking and is highly safe. .

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In Figures 1 to 3, 1 is the main body of the high-frequency heating device, 2 is a heating chamber inside the main body 1 that has an opening on the front, 3 is a door that can be moved to open and close the front opening of the heating chamber 2, and 4 is a high-frequency heating device. An operation unit for setting heating or oven heating; 5 is a metal food tray on which the object to be heated is placed when the high-frequency heating device operates the oven heating; 6 is a metal food tray on which the food tray 5 can be put in and taken out; This is a rail made of an insulator such as ceramics that supports the heating chamber 2 and is provided on the side wall surface of the heating chamber 2.

7 and 8 are hot air ventilation holes and intake holes arranged on the rear wall of the heating chamber 2; the hot air ventilation hole 7 is located at the periphery of the rear wall of the heating chamber 2, and the intake hole 8 is located approximately at the center of the rear wall of the heating chamber 2. Each is provided.

The heating chamber 2 side wall side peripheral edge 5a of the food placement plate 5 extends in the direction of the heating chamber 2 side wall surface, and the side wall side peripheral edge 5a is provided with a ventilation hole 5b, and the hot air blower is provided with a ventilation hole 5b. The hole 7 is located at the peripheral edge 5 on the side wall side.
It is provided at a position opposite to a.

9 is a sub-heating chamber provided adjacent to the rear wall of the heating chamber 2; 10 is a heater for heating the sub-heating chamber 9 to a high temperature; 11;
is a hot air circulation fan connected to a motor provided outside the sub-heating chamber 9.

12 is a magnetron that generates high frequency waves, and 13 is a waveguide that guides the high frequency waves generated by the magnetron to the heating chamber 2.

The operation of the high-frequency heating device configured as described above will be described below. First, when heating the oven, place the food tray 5 on which the object to be heated is placed on the rail 6, and set the operating section 4 to the oven heating side, and the heater 10 and hot air circulation fan will operate. , Hot air circulates in the flow path shown below, and the object to be heated is heated.

Sub-heating chamber 9→ventilation vent 7→heating chamber 2→intake vent 8→sub-heating chamber 9.

At this time, as is clear from the above configuration, the food placement portion 9c of the food placement tray 9 is not directly heated by the hot air coming out of the hot air vent 7, and furthermore, the food placement portion 9c of the food placement tray 9 is not locally heated. The hot air inside the heating chamber 2 is more evenly distributed through the ventilation holes 9b provided at the peripheral edge of the placing plate 9, allowing for uniform heating.

On the other hand, in the case of high frequency heating, the food placing plate 5
A saucer (not shown) made of radio wave-transparent glass or the like is placed at the bottom of the heating chamber 2, and cooking is performed. At this time, since the protruding dimension of the rail 6 into the heating chamber 2 is smaller than that of the conventional case, the heating chamber 2
has little effect on the effective dimensions of

Further, even if high-frequency heating is performed while the food tray 5 is accidentally stored in the heating chamber 2, there is no risk of sparks because the material of the rail 6 is an insulating material.

As described above, according to this embodiment, the rail member is formed of an insulating material such as ceramic, and furthermore, a ventilation hole is provided by extending the peripheral edge of the heating chamber side wall of the food placing plate used during oven heating. By arranging the hot air vents to face the peripheral edge extension, the following effects can be achieved.

First, during oven heating, there is less uneven heating compared to conventional rectangular food trays, and the same level of cooking performance as the turntable method can be achieved. Also,
The rail does not reduce the effective area within the heating chamber during high-frequency heating. Furthermore, since the length of the rail protruding into the heating chamber can be reduced, the rail is less likely to break and its durability is improved. Further, even if high-frequency heating is performed with the food tray placed in the heating chamber by mistake, there will be no sparks, so there is no risk of shortening the life of the device itself or causing burns.

Effects of the invention As described above, according to the invention, uniform heating is possible even when using a rectangular food tray during oven heating, and it is possible to provide a high-frequency heating device that is easy to use and highly safe. It has the effect of

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the high frequency heating device of the present invention, Fig. 2 is a partially cutaway sectional view of the same device,
FIG. 3 is a perspective view of the food tray in the same device. 2...Heating chamber, 5...Food placement plate, 6...Rail, 7...Hot air vent, 8...Intake hole, 9...Sub-heating chamber, 10...Heater, 11...Hot air circulation fan .

Claims (1)

[Scope of utility model registration request] A heating chamber for storing objects to be heated, a food placement plate used during oven heating, a rail formed from an insulator such as ceramics provided on the side wall of the heating chamber and supporting the food placement plate, and a rear wall surface of the heating chamber. a hot air blowing hole and an air intake hole arranged in the heating chamber, a sub-heating chamber provided adjacent to the rear wall surface of the heating chamber, a heater and a hot air circulation fan provided in the sub-heating chamber, and heating the food placing plate. The high-frequency heating device has a configuration in which a peripheral edge of the chamber side wall extends to the side wall of the heating chamber and is provided with a ventilation hole, and the hot air ventilation hole is arranged opposite to the extended peripheral edge of the food placement plate.