Immersion heater

Details Immersion heater Immersion heater

1979-02-13

1980-10-28

Mayewsky, Volodymyr Y.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219328, 219441, 219504, 219530, 219540, 219541, 219544, 338 22R, H05B 306

Patent

active

042309352

ABSTRACT:
An immersion heater is disclosed having a heating member with a small thickness and comprised of PTC thermistor material. The heating member has the same heat contact between each of its two major surfaces and the medium to be heated. A Curie temperature T.sub.C and a specific resistance .rho..sub.T.sbsb.C of the material are dimensioned such that with a given operating voltage U a temperature regulation for the range with the positive temperature coefficient of the material results. By use of the upper limit of the Curie temperature T.sub.C, extensive protection against fire can be obtained in the case of inappropriate handling of the immersion heater.

REFERENCES:
patent: 3375774 (1968-04-01), Fujimura et al.
patent: 3400250 (1968-09-01), Buiting et al.
patent: 3719796 (1973-03-01), Abildtrup
patent: 3725643 (1973-04-01), Clausse
patent: 3835434 (1974-09-01), Kahn
patent: 4086467 (1978-04-01), Grant
patent: 4104509 (1978-08-01), Bokestal et al.
patent: 4147927 (1979-04-01), Pirolti
patent: 4177375 (1979-12-01), Meixner
"Properties of Semiconductive Barium Titanates", by Osamu Saburi, Journal of the Physical Society of Japan, vol. 14, No. 9, Sep. 1959, pp. 1159-1174.

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