Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1995-08-25
1998-01-27
Walberg, Teresa J.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
F27D 1100
Patent
active
057124655
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an insulated electrically heated pot which is provided with an insulated container and an electric heating apparatus disposed therewithin; a liquid such as water or the like is placed within the insulated container, and the temperature of the hot water is maintained.
BACKGROUND ART
In general, insulated electrically heated pots have a structure provided with a container having a double-walled structure in which an inner container and an outer container are joined and made unitary at the openings thereof, the space between the inner and outer containers being placed in a vacuum state; and a heater unit for heating the liquid stored within the inner container by means of heat transfer.
FIG. 2 shows, as an example of a conventional pot for boiling water, the pot described in Japanese Utility Model, First Publication, No. Sho 62-73836; this water boiling pot 1 has a structure in which a heater unit 3 is affixed to the inner bottom surface of a container 2 having a vacuum double-walled structure in a water-tight manner by means of packings 4 and 5.
However, the conventional vacuum insulated water boiling pot shown in FIG. 2 above has a structure in which the space between the inner container and the outer container is placed in a vacuum state, so that atmospheric pressure is constantly placed on the double-walled container, and in order to disperse this force, a form having curved surfaces is necessary, and as a result, it is generally necessary to provide an inner container and an outer container with a cylindrical form having a bottom, and as a result of employing such a form, there is a problem in that the proportion of the inner capacity with respect to the outer capacity of the outer container, that is to say, the capacity efficiency, is low.
DISCLOSURE OF THE INVENTION
The present invention was created in light of the above circumstances; it has as an object thereof to provide an insulated electric heated pot in which the insulation performance of the container is high, and moreover, one in which the container has a shape which increases the capacity efficiency.
In a first aspect of the present invention, an insulated electrically heated pot is provided with an insulated container in which an inner container and an outer container are made unitary at the openings thereof, the space between these inner and outer containers being made an insulating layer, and an electric heating apparatus for heating a liquid stored within the inner container; the insulating layer of the insulated container is filled with at least one type of gas having a low heat conductivity selected from among xenon, krypton, and argon.
In a second aspect of the present invention, a manufacturing method is provided for insulated electrically heated pots provided with an insulated container in which an inner container and an outer container are made unitary at the openings thereof, the space between these inner and outer containers being made an insulating layer, and an electric heating apparatus for heating a liquid stored within the inner container; the inner container and the outer container are made unitary at the openings thereof, a double-walled container having a filling port at one or the other of the inner and outer containers is thus formed, and the space between the inner and outer containers of the double-walled container is placed in a vacuum state, and then, at the time of the formation of an insulation layer by placing at least one type of gas having a low heat conductivity selected from xenon, krypton, and argon within the space via the filing port, sealing this filling port, and thus filling the space between the inner and outer containers with a gas having a low heat conductivity, an insulating layer formation procedure is conducted such that the outer pressure on the double-walled container and the pressure in the space between the inner and outer containers is made approximately equal.
The insulated electrically heated pot in accordance with the present invention
REFERENCES:
patent: 3764780 (1973-10-01), Ellis
patent: 3940589 (1976-02-01), Tupper
patent: 4234783 (1980-11-01), Aoshima
patent: 4241288 (1980-12-01), Aoshima et al.
patent: 4441016 (1984-04-01), Oota et al.
patent: 4517445 (1985-05-01), Tatsumi et al.
patent: 4672179 (1987-06-01), Onishi et al.
patent: 4713522 (1987-12-01), Kimura
Ito Seiichi
Nishino Yoshiya
Yamada Masashi
Nippon Sanso Corporation
Valencia Raphael
Walberg Teresa J.
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