JPH03214587A - Electric grill - Google Patents

Abstract

PURPOSE:To oxidate and remove oil drops attached, by forming a heater for cooking with a super heat resistant ceramic plate (plate heater) in which a heat emitting body is embedded, and providing an oxidation catalyst layer over the surface of this plate heater. CONSTITUTION:A low-expansion coating layer 9 of glass type is provided over the surface of a plate heater 7, and further thereover an oxidation catalyst layer 14 is furnished, which consists of mat-shaped baking of enamel material comprising frit and catalyst, which consists of Pt or Pd and oxide of rare earth. A heat emitting element 8 obtained by winding a heater wire in its inside coil- shapedly and shaping it in zigzag pattern so as to exhibit a plane, is recessed in super heat resistant ceramic. When current is fed, the surface temp. of the heater becomes substantially uniform at 600-700 deg.C. This prevents uneven baking even though the plate heater 7 approaches the material to be cooked, and eventually sputtered and attached oil drops to the surface of this heater 7 will be oxidated insantly by the oxidation catalyst layer 14 to ensure that the surface is kept purified and free from baking-fast.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to improving the oil droplet handling performance of pottery vessels.

2. Description of the Related Art As shown in FIG.
A sheathed heater 27 or a space heater (not shown) made by winding a heating wire around a mica plate, sandwiching it between mica plates and seaming it with a nutless plate, etc. is fixed, and a saucer 24 into which water can be placed is placed under the grill 26. It had a set configuration.

Problems to be Solved by the Invention In such a conventional pottery device, the scattered oil droplets are scattered on the soot part of the heater 27 at 400°C, on the lead to the terminal in the case of a sheathed heater, and on almost the entire surface in the case of a space heater. Stick and bake.

In addition, the oil droplets that dripped downward are absorbed by the water in the saucer 24 and smoke generation is suppressed, but as the water boils during cooking, heat is taken away from it and the internal temperature does not rise sufficiently. The baking performance could not be obtained, and the product was steamed, resulting in a watery finish.

The present invention solves the above problems by completely purifying the scattered oil droplets, and further purifying the dripping oil without pouring water into the water tray, thereby preventing smoke and seizure, and thus achieving good baking performance. Its purpose is to provide pottery.

Means for Solving the Problems The first means of the present invention is to employ an ultra-heat resistant ceramic plate heater with an embedded heating element (hereinafter referred to as a plate heater) as a heater for heating food, and to apply heat to the surface of the plate heater. The configuration includes an oxidation catalyst layer.

Moreover, the second means has a configuration in which a plate heater having an oxidation catalyst layer provided on the surface thereof is disposed below the food to be cooked.

Furthermore, the third means is a plate heater in which a large number of holes are provided in the oxidation catalyst layer.

Function: The oxidation catalyst layer of the present invention is a combination of precious metals such as platinum and palladium and rare earth oxides, and when heated to 30°C or higher, it oxidizes and purifies carbon monoxide and hydrogen chloride. It is possible to efficiently reduce nitrogen dioxide to nitrogen monoxide, and by setting the surface temperature of the plate heater to over SOO℃, instant oxidation and purification is possible.Therefore, it is possible to reduce the amount of nitrogen dioxide that is scattered from the food being cooked. Since the attached oil droplets are oxidized and purified, there is no chance of them becoming burned-in stains that cannot be removed by wiping.

Also, if this plate heater is placed below the food to be cooked and used as a lower heater, the small amount of oil droplets that drip onto the plate heater will be instantly oxidized and purified, but if a large amount of oil is generated, it will cause a little smoke. However, some substances may remain without being completely purified.

At this time, it can be burned out by dry energizing again. Furthermore, by providing a large number of holes in this oxidation catalyst layer, scattered or dripped oil is absorbed into the holes, greatly expanding the contact area with the oxidation catalyst and promoting the purification reaction, making it possible to oxidize and purify even large amounts of oil. I can do it.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIGS. 1 and 2 show an example of an electric range built into a sink of a system kitchen. The electric range is composed of a roaster section 1 and a top heater section 2. Inside the cooking chamber 3 that constitutes the roaster section 1, a water tray 4 and a grill 5 are placed above it. It is placed on the gridiron 5. Reference numeral 7 is a super heat-resistant ceramic plate heater with an embedded heating element, which is installed above and close to the food 6 to be cooked.

As shown in FIG. 4, on the surface of this heating element-embedded ultra-heat-resistant ceramic plate heater 7, a low expansion glass coating layer 9 is formed, for example, beta spodumene is produced in the firing process using betalite and limestone as raw materials. Provide a coating layer.

Further, on the surface of this low-expansion glassy coating layer 9, an oxidation catalyst layer 14 is provided, which is made by firing a enamel material made of a catalyst made of platinum or palladium, etc. and a rare earth oxide, and a frit into a mat shape. A door 8 is provided in front of the cooking cabinet 3.

On the other hand, the upper top heater part 2 is provided with a spiral sheathed heater 12, and reference numeral 13 is an operation unit incorporating a circuit unit (not shown) for controlling the power of each of these heaters. . As shown in FIG. 3, the heating element-embedded ultra-heat-resistant ceramic plate heater 7 has a heating element 8 made of ultra-heat-resistant ceramic, for example, a heating wire wrapped in a coil and shaped into a zigzag pattern to form a planar shape. β
Thermal expansion coefficient of eucryptite, β-spodumene, aluminum titanate, cordierite, etc. 9 to 1 aex1o
/b is embedded in low expansion ceramics to create a super heat-resistant ceramic plate heater. A removable connector pin 10 is provided at the terminal portion of the heating element 8 embedded in this super heat-resistant ceramic plate, and can be detachably connected to a blade receiving portion 11 shown in FIG. 4 provided on the wall surface of the cooking chamber 3. The structure is as follows.

In the above configuration, the operation is explained as follows: open the door 8 of the pottery pot 1, pour a predetermined amount of water into the water tray 4, set the grill 6 on it, and place the food 6 on the grill 5. Cooking room 3
Put it inside and close door 8.

Super heat-resistant ceramic heater 7 with heating element embedded in the operation part 13
When power is started to be supplied to the heater (hereinafter referred to as the heater), if the watt density of the heater 7 is set to 4 to sN/d, the surface temperature of the heater becomes approximately uniform at 600 to Too°C. Therefore, even if the heater 7 is brought close to the food 6, the food can be baked with high heat without uneven cooking. Even if the scattered oil droplets still adhere to the surface of the heater 7, they are instantly oxidized and purified by the oxidation catalyst layer 14 on the surface, preventing seizure. When the food 6 is properly baked, it is turned over and baked in the same manner. When the food is finished, the operation section 13 stops the power supply to the heater 7, and cooking is completed.

Further, as shown in FIG. 1, the heater 7 having the above-mentioned structure is arranged below the cooking chamber 3, and above it a grill is provided, on which the food e is placed. The food 6 is cooked simultaneously on both sides by energizing the heaters 7 provided above and below. If the oil droplets dropped onto the lower heater 7 at this time are small, they can be oxidized and purified by the oxidation catalyst layer 14 on the surface. Items that produce large amounts of oil droplets are
It can be purified by grilling it after cooking.

Further, as shown in FIG. 3, by providing honeycomb-shaped holes 16 in the oxidation catalyst layer 14, even a large amount of oil droplets can be oxidized and purified. Therefore, since water is not used, the internal temperature can be kept at 26° C. or higher without steaming, and baking can be done with high heat.

Effects of the Invention As is clear from the above embodiments, according to the present invention, a super heat-resistant ceramic plate heater with an embedded heating element provided with an oxidation catalyst layer on the surface is used as a heater for heating food. This instantly oxidizes and purifies the oil droplets that have spattered and adhered to the food, preventing any burning and eliminating the need for cleaning.

Furthermore, by placing the above-mentioned heater below the food to be cooked, the present invention purifies oil droplets and suppresses smoke generation without the conventional method of draining water, thereby making it possible to optimally bake at a high temperature without steaming. It is something to do.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of an electric roaster showing an embodiment of the present invention, and FIG. 2 is a perspective view of an electric roaster showing an embodiment of the present invention.
Fig. 3(a) is a perspective view of a super heat-resistant ceramic plate heater with an embedded heating element showing one embodiment of the present invention, Fig. 3(b) is a perspective view of the heating element of the heater, and Fig. 4 is a detail of the heater. FIG. 5 is a cross-sectional view of a conventional electric roaster. 1...Electric oven roaster part, 7...Super heat-resistant ceramic plate heater with built-in heating element, 9...
...Low expansion glassy coating layer, 1o...
・Removable connector bin, 11...Blade receiver, 1
4...Oxidation catalyst layer, 16...Honeycomb-shaped holes.

Claims (3)

[Claims] (1) An electric roaster in which the heater for heating food is an ultra-heat-resistant ceramic plate heater with an embedded heating element, and an oxidation catalyst layer is provided on the surface of the heater. (2) The electric roaster according to claim 1, further comprising an embedded ultra-heat-resistant ceramic plate heater having an oxidation catalyst layer on its surface and disposed below the food to be cooked. (3) The electric roaster according to claim 1 or 2, wherein a large number of holes are formed in the oxidation catalyst layer.