JPH0543497U - Heater for electromagnetic cooker - Google Patents

Abstract

(57) [Summary] [Object] To provide an inexpensive heater for an electromagnetic cooker that is configured separately from the cooking container and that is used in the electromagnetic cooker together with the cooking container. A heater 11 for an electromagnetic cooker is provided with a non-conductive and heat-resistant substrate 11 having a size corresponding to the bottom of a cooking container and a predetermined thickness, and a high-frequency magnetic flux applied to one side surface of the substrate 11. The silver thin film 12 serving as a heating element due to the eddy current generated by and the thin non-conductive and heat-resistant coating layer 13 that covers the silver thin film 12 are used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is an electromagnetic induction heating type electromagnetic cooker (both 100 V and 200 V may be used), and a conventional cooking container (a metal cooking container or a non-metallic cooking container such as a clay pot or a heat-resistant glass pot) may be used. ) With the heater for the electromagnetic cooker.

[0002]

[Prior Art]

 As a non-metal container used in an electromagnetic induction heating type electromagnetic cooker, there is one proposed in Japanese Utility Model Publication No. 59-11436. This non-metallic container for an electromagnetic cooker has a silver thin film that functions as a heating element on at least a part of the surface of the non-metallic container that is close to the electromagnetic cooker, and a non-conductive, heat-resistant coating that covers this silver thin film. The glass coat layer of 1 is sequentially deposited.

[0003]

[Problems to be solved by the device]

 The above-mentioned conventional non-metal container for an electromagnetic cooker is a dedicated electromagnetic cooker that integrally includes a silver thin film that functions as a heating element and a non-conductive and heat-resistant glass coat layer that covers the silver thin film. Not only when the cooking container body is expensive and there is no damage to the cooking container body and the silver thin film or glass coat layer is damaged, but also when the cooking container body is damaged without any damage to the silver thin film or glass coat layer. It becomes unusable and uneconomical. The present invention has been made to address the above-described problems, and provides an inexpensive induction cooker heater that is configured separately from the cooking container and is used with the cooking container in the electromagnetic cooker. Has a purpose.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, in the present invention, the heater for an electromagnetic cooker comprises a non-conductive and heat-resistant substrate having a size corresponding to the bottom of a cooking container and a predetermined thickness. The structure is composed of a silver thin film that becomes a heating element when an eddy current generated by high-frequency magnetic flux is applied to the side surface and a thin non-conductive and heat-resistant coating layer that covers this silver thin film.

[0005]

[Operation and effect of the device]

 The heater for an electromagnetic cooker according to the present invention is used in an electromagnetic induction heating type electromagnetic cooker together with a conventional cooking container (either a metallic cooking container or a non-metallic cooking container such as a clay pot or a heat-resistant glass pot). The usage is as follows: (1) Place the substrate on top of the bottom of the cooking container with the substrate facing upwards (this is limited to non-metallic cooking containers such as clay pots and heat-resistant glass pots). (2) Place the board on the bottom of the bottom of the cooking container so that it faces downward. There are two methods. In the former method, the electromagnetic heater directly heats the food to be cooked in the cooking container, so the heat efficiency is high, and even if the food is burned, it is not on the substrate side of the specified thickness. It does not damage the thin coating layer or the thin silver film that becomes the heating element when peeling off the burned material. On the other hand, in the latter method of use, since the heater for the electromagnetic cooker also functions as a so-called pot cover, even an electromagnetic cooker with a built-in table can be used without burning the upper surface of the table. Further, since the heater for the electromagnetic cooker according to the present invention is configured separately from the cooking container, it is not only inexpensive, but can also be used in an electromagnetic cooker in combination with various conventional cooking containers. Is extremely excellent. In addition, when either the heater for the electromagnetic cooker or the cooking container is damaged, the function can be restored and used by replacing only the damaged one, which is very economical with little damage. It should be noted that if a substrate having a large heat capacity is used as the substrate of the heater for the electromagnetic cooker, the effect of increasing the heat retaining power can be expected.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a heater 10 for an electromagnetic cooker according to the present invention, which is composed of a substrate 11, a silver thin film 12 and a coating layer 13. The substrate 11 has a size corresponding to the bottom of a conventional cooking container (may be a metal cooking container or a non-metallic cooking container such as a clay pot or a heat-resistant glass pot), for example, a diameter of about 9 cm (when the cooking container is large It may be more than this and has a thickness of approximately 4 mm (considering the depth of various conventional cooking containers in ordinary households, and setting it appropriately considering the stability during use. ) Ceramic plate (may be other non-conductive / heat-resistant material), one side surface (bottom surface in the figure) is formed flat, and the other side surface is formed with a rounded peripheral edge. There is. The silver thin film 12 has a diameter slightly smaller than that of the substrate 11 and a thickness of about 20 to 100 micron (the thickness is set according to the performance of an electromagnetic cooker (not shown)) and is attached to one side surface of the base plate 11. The eddy current generated by the high-frequency magnetic flux from the electromagnetic cooker (not shown) flows and becomes a heating element. The coating layer 13 is a ceramic layer (may be other non-conductive / heat-resistant material) having a diameter substantially the same as that of the substrate 11 and a thickness of approximately 20 microns (suitably set in consideration of strength and the like). The silver thin film 12 is covered and protected.

The heater 10 for the electromagnetic cooker described above is manufactured through the following steps (a), (b), (c), and (d). (a) Board (pre-fired ceramics plate) Mounted paper larger than 11 (similar to the one generally used as an overprinting paper for ceramics) and silver paste (a few percent of paste content as a binder) Printed) with a predetermined diameter slightly smaller than the substrate 11 and a thickness of approximately 20 to 100 microns, and then dried. (b) A ceramic material (melting temperature of 800 to 900 ° C.) mixed with a few percent of a paste content as a binder on the printed material obtained in the above (a) is approximately the same diameter as the substrate 11 and has a thickness of approximately 20 microns. So that it is printed and then dried. (c) The transfer paper made in (a) and (b) above is soaked in water so that the backing paper and the printed one are separated, and only the printed portion is slid on one flat side surface of the substrate 11 so that the silver paper The transfer is performed so that the front surface faces the substrate 11, and then dried. (d) The product obtained in (c) above is baked at 800 to 900 ° C. to deposit the silver thin film 12 and the coating layer 13 on the substrate 11.

By the way, the above-mentioned heater 10 for an electromagnetic cooker is used together with a conventional cooking container 20 in an electromagnetic induction cooker type electromagnetic cooker. As shown, the substrate 11 is placed on the top surface of the bottom of the cooking container 20 so that the substrate 11 faces upward (this is limited to non-metallic cooking containers such as clay pots and heat-resistant glass pots). (2) As shown in FIG. 3, the substrate 11 is laid on the lower surface of the bottom of the cooking container 20 so that the substrate 11 faces downward. There are two methods. In the former method of use, since the heater 10 for the electromagnetic cooker directly heats the food to be cooked in the cooking container 20, the heat efficiency is good, and even if the food to be cooked is burned, it is not on the substrate 11 side. When the burnt-in object is stripped off, the thin coating layer 13 and the silver thin film 12 serving as a heating element are not damaged. On the other hand, in the latter method of use, since the heater 10 for the electromagnetic cooker also functions as a so-called pot cover, even an electromagnetic cooker with a built-in table can be used without burning the upper surface of the table.

Further, since the above-described heater 10 for the electromagnetic cooker is configured separately from the cooking container 20, it is not only inexpensive, but it can be combined with various conventional cooking containers 20 to perform electromagnetic cooking. It can be used in vessels and is extremely excellent in practical use. In addition, when either the electromagnetic controller heater 10 or the cooking container 20 is damaged, the function can be recovered and used by replacing only the damaged one, so there is little damage and it is extremely economical. Is. Further, in this embodiment, since the substrate 11 is a circular ceramic plate having a diameter of about 9 cm and a thickness of about 4 mm, and a large amount of heat can be stored inside, the effect of increasing the heat retention can be expected.

In the above embodiment, the heater 10 for an electromagnetic cooker according to the present invention is manufactured through the steps (a), (b), (c) and (d). The heater for a cooker has a non-conductive and heat-resistant base plate of a predetermined thickness and a size corresponding to the bottom of the cooking container, and an eddy current generated by a high-frequency magnetic flux attached to one side of the base plate. Any structure may be used as long as it is composed of a silver thin film that becomes a heating element by flowing and a thin non-conductive and heat resistant coating layer that covers this silver thin film, and the manufacturing process is not limited to the above-mentioned embodiment. Absent.

[Brief description of drawings]

FIG. 1 is a central longitudinal sectional view showing an embodiment of a heater for an electromagnetic cooker according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a mode of use of a heater for an electromagnetic cooker according to the present invention.

FIG. 3 is a central longitudinal sectional view showing another usage mode of the heater for the electromagnetic cooker according to the present invention.

[Explanation of symbols]

10 ... Heater for electromagnetic cooker, 11 ... Heat resistant substrate, 12 ... Silver thin film, 13 ... Heat resistant coating layer, 20 ... Cooking container.

Claims (1)

[Scope of utility model registration request] 1. A non-conductive and heat-resistant substrate having a size corresponding to the bottom of a cooking container and having a predetermined thickness, and an eddy current generated by a high-frequency magnetic flux attached to one side of the substrate. A heater for an electromagnetic cooker including a silver thin film that becomes a heating element by a heat treatment and a thin non-conductive and heat-resistant coating layer that covers the silver thin film.