JPH02135686A - Heating container for electromagnetic cooker - Google Patents

Abstract

PURPOSE:To prevent a characteristic from being damaged even in an unusual heating state by providing a heat radiation layer having specific emissivity on the surface of a metal heat generation layer of a container bottom. CONSTITUTION:When a heat radiation layer having emissivity above 0.6 is provided on the surface of a metal heat generation layer provided on the bottom of a container, melting or the like of the heat generation layer due to temperature rise toward 700 deg.C of the metal heat generation layer at the time of generated burning and sticking or the like can be prevented. As a result, a heating container for electromagnetic cooker is free from the damage to a characteristic even in an unusual heating state such as empty cooking, burning and sticking.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a heating container such as an earthenware pot used in an electromagnetic cooker.

BACKGROUND OF THE INVENTION A heating container used in a conventional electromagnetic cooker has a sprayed layer of aluminum formed by a spraying method, as disclosed in, for example, Japanese Utility Model Application Publication No. 60-145596. Furthermore, in earthenware pots for electromagnetic cookers that are generally available on the market, a silver layer printed with silver paste is formed to serve as a metal heating layer.

Problems to be Solved by the Invention However, when the conventional heating container described above is used, it is difficult to place it on the plate of an electromagnetic cooker without putting food inside the heating container and energize it. Even when cooking on the plate of an induction cooker with food inside, if the mochi or udon gets burnt,
The temperature of the metal heating layer rose to nearly 700°C, and the galanium in the aluminum and silver paint melted, causing the metal heating layer to melt and become unusable, and the metal heating layer to swell. There were problems such as smearing.

In view of these problems, it is an object of the present invention to provide a heating container for an electromagnetic cooker whose characteristics are not impaired even in abnormal heating conditions such as dry cooking and burning.

Means for Solving the Problems In order to solve the above problems, the present invention provides a metal heat generating layer at the bottom of the container, and further provides a heat dissipating layer with an emissivity of 0.6 or more on the surface of this metal heat generating layer. It is something.

Effect: According to the above configuration, it is possible to improve the heat dissipation state of the conventional metal heat generating layer, lower the temperature, and eliminate abnormalities.

In particular, containers made of materials with poor heat conductivity, such as clay pots and ceramic plates,
When a layer of aluminum, silver, etc. is provided as a metal heat generating layer, the surface is metal and the emissivity of each is small, about 0.2, so there is little heat radiation from the surface, so dry cooking or burning may occur. , the temperature of the metal heating layer rises abnormally,
In some cases, the temperature exceeds 700'C, but in the above configuration, a heat dissipating layer with an emissivity of 0.6 or more is provided, so the temperature of the metal heat generating layer is as low as 50 to 200'C, which prevents abnormalities from occurring. The effect is particularly great in heat dissipation layers with an emissivity of 0.8 or higher.

By providing the heat dissipation layer on the surface of the metal heat generating layer in this way, the metal heat generating layer will not be damaged even in abnormal heating such as dry cooking or burning.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

First, the caliber is 261. Bottom diameter 180. Height 10α.

A No. 8 earthenware pot 1 with an average wall thickness of 4 fl was prepared. This earthenware pot 1 is made mainly of subodumene, and has a raised platform 1a at the bottom. A metal heat generating layer 2 was formed on this clay pot 1 by thermal spraying aluminum or by printing and baking silver paint.

This clay pot was coated with materials having various emissivities shown in Table 1. This coating can be applied by thermal spraying or with an inorganic binder (water glass).

The coating was applied by kneading with a metal phosphate (metal phosphate, metal alkoxide, glass, crystallized glass, colloid, etc.) and, if necessary, firing.

Next, in order to evaluate these heating containers, dry cooking and rice cake burning tests were conducted, and the results are shown in Table 1. A conventional example without a radiation layer is also shown.

(Hereinafter referred to as gold and white) Table 1 In Table 1, the ○ mark indicates that no abnormality was observed in the above test, and the Indicates that you have been seen. In addition, the metal heat generating layers of Nos. 1 to 7 were formed by thermal spraying of aluminum, and those of /168 to 16 were formed by printing and firing a silver paste.

As is clear from Table 1, no abnormalities were observed in the samples 7163-7 and 10-16, which were provided with a heat dissipation layer 3 with an emissivity of 0.5 or more, while the samples /161-2 and 8-9 Abnormalities were observed in the sample.

In this way, by forming the heat dissipation layer 3 with an emissivity of 0.5 or more on the surface of the metal heat generation layer 2, it is possible to obtain a product that does not lose its characteristics even during dry cooking or burning. be.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention, a metal heat generating layer is provided at the bottom of the container, and a heat dissipating layer having a surface K of the metal heat generating layer and an emissivity of 0.6 or more is further provided. Because of this, even in abnormal heating conditions such as dry cooking or burning,
It is possible to provide a heating container for an electromagnetic cooker in which the characteristics of the metal heating layer are not impaired.

[Brief explanation of the drawing]

The figure is a sectional view of a heating container for an electromagnetic cooker showing an embodiment of the present invention. 1... Earthenware pot (container), 2... Metal heat generating layer, 3... Heat dissipating layer. Name of agent: Patent attorney Shigetaka Awano and 1 other person/-
--Earthen pot (container) 2- Sediment from Kinhuang layer 3- Natural eyebrows

Claims (1)

[Claims] A heating container for an electromagnetic cooker, which has a metal heating layer on the bottom of the container, and a heat radiation layer having an emissivity of 0.5 or more on the surface of the metal heating layer.