JPS61153413A - High frequency heating device - Google Patents

Abstract

PURPOSE:To cool a door by a simple constitution by a method wherein a choke groove at the door inside which intercepts a leakage electric wave from a heating chamber is connected to an open air by a vent hole. CONSTITUTION:A vent hole 13 is provided on the outside direction of a door cladding 12 and the choke groove 9 while ventilating air is flown between the choke groove 9 and a cover 10. Heat of a heater 3 is transferred to a heating chamber before and behind 5, the choke groove 9 and the cover 10 while the front transparent plate 11 which is apt to touch by the man and the door cladding 12 are heated, however, the choke groove 9 which is a heat transfer path and the cover 10 are cooled by the ventilating air 14, therefore, they may not be heated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a high-frequency heating device with an electric heater for the purpose of cooling a door.

Conventional high-frequency heating devices with electric heaters heat up not only the food and the heating chamber, but also the outer surface of the door that is touched by people.
As shown in Publication No. 4, ventilation air 22 is passed between the front transparent plate 21 and the outer protection transparent plate 19 to cool the door.

Problem to be Solved by the Invention However, the problem is that the space between the front transparent plate 21 and the outer protective transparent plate 19 is
When the temperature of the front transparent plate 21 or the outer protection transparent plate 19 is lower than that of the ventilation air 22 passing through, or when the humidity of the ventilation air 22 is high, the water vapor in the ventilation air 22 solidifies, causing the front transparent plate 21 to cool. Dew drops form on the inside of the door and on the outer protective transparent plate 19, causing the transparent plate to become cloudy and making it impossible to see inside the heating chamber 12.It is impossible to wipe off the dew drops, and the water naturally evaporates. All I could do was wait patiently. Furthermore, if water or juice is accidentally spilled and entered through the entrance/exit hole of the ventilation air 22 to the door 15, it is fatal to the function of the transparent plate that it cannot be wiped off, and it is also aesthetically unsatisfactory. There was a problem that I didn't like it.

The present invention solves these conventional problems and provides a high-frequency heating device that cools the door with a simple configuration.

Means for Solving the Problems According to the present invention, a choke groove inside the door for stopping leakage of radio waves from the heating chamber is connected to the outside air through a ventilation hole.

Function The present invention cools the door by allowing ventilation air to pass through the choke groove inside the door and the ventilation hole that connects the choke groove to the outside air. This will completely eliminate cloudiness and dirt on the board.

EXAMPLE Hereinafter, a high frequency heating device according to an example of the present invention will be explained with reference to the drawings.

As shown in FIG. 1, the heating chamber 1 includes a heater 3 that supplies electric heat to the food 2 and a magnet that supplies microwaves.
On 4 is attached, and a door 6 is provided opposite the heating chamber front plate 5 at the entrance/exit of the food 2 of the heating chamber 1. Door 6 is
A metal perforated plate 7 for reflecting microwaves from the magnetron 4 and observing the doneness of the food 2; a protective transparent plate 8 for protecting the perforated plate 7 from food debris; and a perforated plate 7. A choke groove 9 that is integrally pressed and prevents leakage of microwaves from the heating chamber 1, and a cover 10 for the choke groove 9.
It is composed of a front transparent plate 11 for mechanical protection from the front side of the door and for aesthetic reasons, and a device 2 outside the door.

A ventilation hole 13 is provided on the outer side of the door of the outside door device 2 and the choke groove 9, and ventilation air flows between the choke groove 9 and the cover 10, and the heat of the heater 3 is transferred to the heating chamber front plate 6 and the choke groove 9. The heat is transmitted through the cover 10 and tries to heat the front transparent plate 11 and the door outside device 2, which are easily touched by people.
Since the choke groove 9 and the cover 10, which are the heat transfer paths, are cooled by the ventilation air 14, the front transparent plate 11 and the door outside device 2, which are easily touched by people, are not heated. According to experiments, the heating of the front transparent plate 11 and the outside door device 2 by the heat in the heating chamber 1 is caused by the radiant heat from the protective transparent plate 8 and the perforated plate 7. It has also been confirmed that the heat transferred through the cover 10 has a large effect, and cooling the choke groove 9 has a large effect in preventing heating of the front transparent plate 11 and the outside door device 2, which are easily touched by people. be.

Note that there is no ventilation hole in the choke groove 9 toward the inside of the door, so steam, water, juice, etc. will not enter the space surrounded by the protective transparent plate 8, the choke groove 9, and the front transparent plate 11. , transparency, and aesthetics will not be compromised.

FIG. 2 is a perspective view of one embodiment of the present invention, showing the ventilation hole 1
3 shows the flow of ventilation [14].

Effects of the Invention As described above, according to the present invention, the choke groove in the door, which is indispensable for high-frequency heating equipment, is configured as a cooling circuit for cooling the door, and the part of the door viewing window that cannot be wiped is removed. O

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view 4 of a high-frequency heating device according to an embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a cross-sectional view of a conventional high-frequency heating device. 1... Heating chamber, 2... Food, a...
...Heater, 4...Magnetron, 5...
... Heating chamber front plate, 6 ... Door, 7 ...
... Perforated plate, 8... Protective transparent plate, 9...
...Choke groove, 10...Cover, 11...
... Front transparent plate, 12 ... Door exterior, 13
...Ventilation hole, 14...Ventilation wind. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
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Claims (1)

[Claims] A heating chamber that heats food, a heater that supplies electric heat to the heating chamber, and a door at the opening of the heating chamber.The door has a perforated plate that allows you to see into the heating chamber, and a protective transparent plate inside and outside of the perforated plate. A choke groove prevents radio wave leakage from the opening of the heating chamber, and at least a part of the choke groove is constituted by a space, and the choke groove is sealed in the direction toward the inside of the door, and is closed to outside air in the direction toward the outside of the door. A high-frequency heating device that consists of a cooling circuit connected with a ventilation hole.