Heating apparatus with humidity sensor

Details Heating apparatus with humidity sensor Heating apparatus with humidity sensor

1986-02-13

1988-03-29

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055E, 219492, 73 73, 733365, 99325, 374149, H05B 668

Patent

active

047345543

ABSTRACT:
A heating apparatus contains a humidity sensor for detecting vapor amount generating from the heated object and a control unit for controlling the heating time on the basis of the signal output from the humidity sensor. The humidity sensor includes a first heat sensor for detecting the atmospheric temperature and a second heat sensor which is self-heated or heated by a heating source. The control unit includes a comparator for comparing the temperature change of the first heat sensor with that of the second heat sensor which change is caused by vapor generating from the heated object, and a control circuit for controlling the additional heating time on the basis of the time the signal output from the comparator took to reach the value preset for each kind of heated objects, when the preset value is reached.

REFERENCES:
patent: 2733607 (1956-02-01), Miller
patent: 3719810 (1973-03-01), Ahlquist et al.
patent: 3813927 (1974-06-01), Furgason
patent: 4316068 (1982-02-01), Tanabe
patent: 4379406 (1983-04-01), Bennewitz et al.
patent: 4501147 (1985-02-01), Niwa

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