JPS6231765Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cooking device such as a steam oven toaster, and is particularly aimed at improving the performance of draining water droplets adhering to a ceramic body for supporting a heater during steam cooking.

BACKGROUND ART Recently, with the increase in the number of frozen foods, etc., cooking appliances such as dual-purpose electric steam ovens, which have not only conventional oven cooking functions but also steam cooking functions for thawing and steaming, are being used frequently. As is well known, in this type of cooking device, heaters are arranged above and below a roughly box-shaped cooking chamber, and food can be placed between these and heated by the upper and lower heaters to be baked, or it can be placed outside the roughly box-shaped cooking chamber. A built-in steam generator sends heated steam into the cooking chamber for steam cooking. However, especially in the case of steam cooking, the heated steam adheres to the ceramic body supporting the heater and condenses, causing dew to build up over time. As time passes, the heated steam becomes large droplets, and the entire heater supporting pottery is flooded with water. In such a state, the electrical insulation resistance of the ceramic body for supporting the heater decreases and the insulation performance deteriorates, resulting in an extremely dangerous situation where electric shock is likely to occur. Therefore, electric steam ovens use temperature regulators such as thermostats to prevent the temperature inside the cooking chamber from rising.
A water-repellent insulator such as silicone rubber is installed between the ceramic body for supporting the heater and the cooking chamber, so that even if the ceramic body gets wet with steam, the electrical insulation between it and the cooking chamber will not deteriorate due to the insulator. As a result, there was no risk of electric shock, etc., and it was safe.

However, in cooking devices such as toaster ovens that are mainly used for baking bread, there is no temperature regulator such as a thermostat to prevent the temperature inside the cooking chamber from rising, and the inside of the cooking chamber of this type of cooking device is continuously energized. This exceeds the heat resistance temperature (approximately 180°C) of insulators such as silicone rubber, making it impossible to use this type of insulator between the heater support ceramic body and the cooking cabinet.

The present invention solves the above-mentioned conventional drawbacks, and embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a heater, which is constructed by providing a heating wire 3 in a hollow pipe 2 made of an insulating material, and both ends of the hollow pipe 2 are made of ceramic for supporting the heater made of an insulating material such as ceramic. The ceramic body 4 for supporting the heater is mounted so as to be located inside the left and right side plates 5, 5' constituting the cooking cabinet. This ceramic body 4 for supporting a heater is composed of a substantially cylindrical large diameter part and a small diameter part, and forms a recess 4a into which the end of the heater 1 is inserted, and a through hole 4b continuous with the recess 4a. There is. Further, a protrusion 4c having a substantially triangular cross section is formed at the lower part of the outer peripheral portion of the heater supporting ceramic body 4 on the inlet side of the hollow pipe 2. A rib 4d is formed in the through hole 4b, and a conductive plate 6 that passes through the through hole 4b and is electrically connected to the heating wire 3 is supported on the rib 4d. Reference numeral 7 denotes a reflector that constitutes the top and rear surfaces, and a cooking cabinet 8 is constituted by this reflector 7 and the left and right side plates 5, 5'.

In the above configuration, when steam is supplied into the cooking chamber 8 from a steam generator (not shown) placed outside the cooking chamber 8 to perform steam cooking, the left and right side plates 5,
5' and the reflecting plate 7, heated steam adheres to the ceramic body 4 for supporting the heater, and the droplets tend to connect to the surface of the ceramic body 4 for supporting the heater, but the cross section formed on the ceramic body 4 for supporting the heater has a substantially triangular shape. protrusion 4c
Since the droplets are separated, the same effect as when an insulator with good water repellency is provided can be achieved.
During this steam cooking, the heating wire 3 is configured not to be energized by a changeover switch (not shown).

Note that the protrusion 4c may be formed all around the heater supporting ceramic body 4, but as a result of experiments, it was found that it was better if the protrusion 4c was formed at least at the lower part. Furthermore, even if the conductive plate 6 enters the through hole 4b, the conductive plate 6 is highly supported by the ribs 4d.
is not immersed in water.

As described above, according to the present invention, the steam supplied into the cooking chamber during steam cooking adheres to the heater supporting ceramic body located inside the cooking chamber and attached to the left and right side panels that constitute the cooking chamber. Even if the water droplets form into water droplets, the water droplets can be quickly dropped into the cooking cabinet by the protrusion with a substantially triangular cross section formed at least at the bottom of the hollow pipe inlet side of the outer periphery of the ceramic body for supporting the heater. There is no possibility that the cooking chamber will infiltrate into the hollow pipe, and as a result, there will be no electrical continuity between the cooking chamber and the heating wire in the hollow pipe, so that sufficient insulation of the cooking chamber can be ensured. Furthermore, even if water were to enter the through-hole, the ribs formed in the through-hole would keep the conductive plate afloat, so the conductive plate would not be immersed in the water. It is possible to ensure the insulation of the cooking chamber.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a toaster oven showing an embodiment of the present invention, and FIG. 2 is a perspective view of a ceramic body of the toaster oven. DESCRIPTION OF SYMBOLS 1...Heater, 2...Hollow pipe, 3...Heating wire, 4...Ceramic body for heater support, 4a...Recess, 4b...Through hole, 4c...Protrusion, 4d...
Rib, 5, 5'... Left and right side plates, 6... Conductive plate, 7
... Reflector, 8... Cooking cabinet.

Claims (1)

[Scope of utility model registration request] A substantially cylindrical heater supporting device that is provided with a steam generator outside the cooking chamber that supplies steam into the cooking chamber, is located inside the cooking chamber, has a heating wire inside, and supports a hollow pipe made of an insulating material. A ceramic body is attached to the left and right side plates constituting the cooking chamber, and the ceramic body for supporting the heater has a recess into which the end of the hollow pipe is inserted, and a through hole continuous with the recess, and The end of the wire is connected to a conductive plate, the conductive plate is supported on a rib formed in the through hole, and a substantially triangular cross section is provided at least at the lower part of the outer periphery of the ceramic body for supporting the heater on the inlet side of the hollow pipe. A cooking device such as a steam oven toaster formed with a protrusion.