Stoves and furnaces – Heaters – Chemical
Patent
1989-11-17
1991-06-04
Jones, Larry
Stoves and furnaces
Heaters
Chemical
126262, 252 70, F24J 100
Patent
active
050205099
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a heating device for quickly heating liquids such as water, oil, etc., and solid matters. More particularly the invention pertains to a heating element which is capable of effecting quick heating with no need of using generally used heating means such as electrical means, combustible gases and solid fuels.
BACKGROUND ART
Electricity, combustible gases, and liquid and solid fuels comprising hydrocarbons are generally used as heating means for heating liquids and solid materials. As a specific heating technique, hydration reactions of calcium oxide, calcium chloride, aluminum or the like are utilized for generating heat (see Japanese Utility Model Application Kokai (Laid-Open) Nos. 60-70235, 61-89332, 62-93654, etc.).
Lately, as a more specific heating medium, there has been proposed a heating device comprising a mixture of red lead oxide powder and silicon powder packed into an elongated tube, such as adopted in a portable boiler-warmer disclosed In Japanese Patent Application Kokai (Laid-Open) No. 52-19358.
Commonly used electricity and combustible gases are very convenient for indoor use, but their outdoor utilization involves many inconveniences. On the other hand, liquid and solid fuels using hydrocarbons are poor in portability since the equipment needs to be enlarged for accelerating the heating speed. Also, difficulties are involved in their outdoor use in a rainy or windy days.
The heating element utilizing heat generation by a hydration reaction of calcium oxide, calcium chloride or aluminum is suited for outdoor use, but it has the drawbacks that the heating speed is relatively slow and that the amount of heat obtainable per unit volume of the calorific agent is very low.
The portable boiler-warmer making use of a calorific agent comprising a mixture of red lead oxide powder and silicon powder packed into an elongated tube (Japanese Pat. Application Kokai No. 52-19358) is fit for either indoor or outdoor use for boiling of water or oil and heat retention. In the case of this device, however, it is unavoidable that the whole casing is relatively enlarged in size. Also, its use is limited to some specific heating purposes, and further the structure of the container is complicated. In addition, the calorific agent itself has the problems of involving troublesomeness in packing it into an elongated tube and the concomitant high production cost. Also, due to the nature of the calorific agent, it needs to apply heating for a while by an electric heater or a lighter for effecting ignition. Thus, a large amount of heat is needed for igniting the calorific agent, which means poor ignitability of the agent.
DISCLOSURE OF THE INVENTION
For the purpose of enabling quick heating of liquids or solid materials in use either indoors or outdoors, the present invention is designed to provide a heating device which is capable of easy and quick firing and heating without generating any odious smell during combustion, even at a site where no electricity or gas is available, and which is also small in size, hence handy to carry and low in cost.
As a result of many experiments and studies on the heaters in which a large amount of heat can be generated by a calorific agent and which is easy to handle and low in cost, the present inventors have succeeded in developing a heating device consisting of a heat generating portion composed of a mixture of at least one of ferric oxide, cupric oxide and trilead tetroxide powder and powder of silicon and/or silicon-iron alloy; a firing portion disposed contiguous to said heat generating portion and constituted from, a mixture of powder of boron and/or aluminum which ignites at a high temperature but on application of a small amount of heat and at least one of ferric oxide, cupric oxide, barium peroxide and strontium peroxide powder; and an igniting portion situated adjacent to said firing portion: a casing possessing said heating device being disposed at the bottom, a side or periphery of the casing and having a section for receiving
REFERENCES:
patent: 2914061 (1959-11-01), Del Raso
patent: 4013061 (1977-03-01), Trumble et al.
patent: 4664674 (1987-05-01), Oftedal et al.
patent: 4722323 (1988-02-01), Oblon
patent: 4819612 (1989-04-01), Okamoto et al.
European Search Report, PCT/JP89/00293, (6-1989).
Kondo Hiroyuki
Mizunuma Susumu
Suzuki Ryoichi
Jones Larry
Nippon Steel Corporation
Nissin Food Products Co., Ltd.
Nitto Seiki Co. Ltd.
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