JPS59108518A - Heat insulating type cooking container - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a heat-retaining cooking container.

Conventionally, a heat-retaining water kettle, for example, has been developed as a cooking container of this type.

This/A? JI Kashibot has the advantage of being able to heat and keep warm in one unit, but in all conventional models, the heater is attached to the outer container of the vacuum double bottle, so the heat of the heater is was easily dissipated into the atmosphere, resulting in poor thermal efficiency.

An object of the present invention is to provide a heat-retaining cooking container that minimizes dissipation of heat from the heater to areas other than the inner container by providing a heater in the inner container separated by a vacuum area from the outer container. It is.

The embodiment will be described with reference to the drawings. The space 3 between the inner container 1 and the outer container 2 is formed in a vacuum, and upper and lower insulating films 5.8 are formed on the outer surface 1a of the inner container 1 based on the inner container 1.
The heating element layer 4 is coated with. The heat generating layer 4 is preferably provided on the bottom outer surface of the inner container 1 and on the outer peripheral surface of the lower half of the inner container 1.

To form the heating element layer 4, first, an insulating film 5 is formed on the outer surface 1a of the inner container 1. The inner container 1 is made of, for example, a stainless steel plate.
2 to 0.8 m. The insulating film 5 is formed by covering the outer surface 1a of the inner container 1 with enamel to a thickness of 0.3 m or more. Next, a heating element 6 is laminated on the insulating film 5. This heating element 6 is made by laminating a large number of Ta alloy thin film resistors arranged in strips at regular intervals, and connected in parallel to the lead wire 10. The thickness of the Ta alloy layer used is about lum. .

A temperature sensor 7 can be provided on the insulating film 5 together with the heating element 6 . The temperature sensor 7 is, for example, a thin film thermocouple made of copper-constancouple, which is provided in the gap between the heating elements 6. Next, an insulating film 8 is laminated thereon.

The membrane 8 is, for example, a 5i02 layer with a thickness of 0.1 um.

As a result, the heating element layer 4, in which the heating element 6 and the sensor 7 are covered, is formed on the outer surface 1a of the inner container 1 between the insulating films 5.8. In order to further improve thermal efficiency, a heat reflective film 9 may be coated. Copper is applied as a reflective film 9 by a thickness of 0.1. In the above example, a film having a thickness on the order of microns is formed by vacuum evaporation, ion blasting, sputtering, or the like.

In addition to the materials used in the above examples, the insulating film 5.8 may be a film formed by spraying ceramic or heat-resistant resin, or a film formed from glass paste.

Further, as the heating element 6, a Ni--Cr-based or other thin film resistor, a thick film paste resistor, or a ribbon-shaped resistor can be used. In addition to copper, the heat reflecting film 9 can be made of a material with good heat reflecting efficiency, such as gold. Inner container 1 above
may be made of aluminum alloy. In this case, the lower insulating film 5 may be an alumite-treated film.

The outer container 2 is made of stainless steel, and its inner surface is coated with a heat reflective film.

The manufacturing method of the product of the present invention includes first forming the heating element layer 4 on the inner container 1 in advance, placing the inner container 1 in the outer container 2, and
The two are airtightly integrated. Next, after exhausting the air in the space 3 with the exhaust pipe 11, the pipe 11 is cut and sealed.

Although the drawings show an example of a kettle, the present invention can be applied to general cooking containers such as wide-mouthed tin containers.

For example, if you apply it to a pot, it will be suitable for boiling beans and other foods for a long time.

The present invention has the above configuration, and since the heat generating layer is provided integrally with the inner container, the thermal efficiency during heating is high. Furthermore, since the heating element layer is completely surrounded by vacuum except where it contacts the inner container, heating efficiency is further improved. Of course, in terms of heat retention, the inner container and outer container are completely isolated by vacuum, so the heat retention efficiency is high. Furthermore, in the present invention, since the heating element layer is integrally laminated with the inner container as a base, assembly is much easier than in a case where a heating structure such as a coil is provided separately from the inner container. In addition, if a reflective film is provided, thermal efficiency can be further improved.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment, and FIG. 2 is an enlarged view of the main part of FIG. 1. 1-Ippaku container 1a-Inner container outer surface 2-Outer container
3-Space 4-Heating element N 5-Insulator film 6-Heating element 7-Temperature sensor 8-Insulator film 9-Heat reflective film Patent applicant Sanyo Shinku Kogyo Co., Ltd. Representative Patent Attorney Nishi 1) Shin

Claims (1)

[Claims] (11) The space between the inner container and the outer container is formed in a vacuum, and a heating element layer is formed on the outer surface of the inner container, which is covered with upper and lower insulating films based on the inner container. A heat-retaining cooking container characterized by: (2) A heat-retaining cooking container according to claim 1, wherein the outer surface of the upper insulating film is coated with a heat reflective film. A heat-retaining cooking container according to claim 1 or 2, which is provided in the body layer.