Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1996-01-23
1999-01-05
Gorgos, Kathryn L.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
363 89, 363124, G01N 2726
Patent
active
058557520
ABSTRACT:
An apparatus for cleaning a gas sensor and a method therefor are disclosed. A high voltage is supplied to a heat generating body of the gas sensor for a certain period of time to generate a large amount of heat within a short period of time so as to remove the moisture or miscellaneous gases absorbed into on the surface of the gas sensor, thereby stabilizing the characteristics of the gas sensor. The apparatus includes: a power supply section for receiving an ac voltage from a commercial ac power source to convert it into a rated voltage and an excessive voltage exceeding the rated voltage; and a switching section for supplying the rated voltage to the gas sensor after supplying the excessive voltage of the power supply section to a heat generating body of a gas sensor for a certain period of time. The method for cleaning a gas sensor includes the steps of: supplying an excessive voltage to the heat generating body of the gas sensor; maintaining the excessive voltage for a certain period of time to remove the gas absorbed into the surface of the gas sensor by means of the high heat of the heat generating body; and supplying a rated voltage to the gas sensor to clean the gas sensor.
REFERENCES:
patent: 4740878 (1988-04-01), Carter et al.
patent: 5247156 (1993-09-01), Favre
Gorgos Kathryn L.
Leader William
Samsung Electro-Mechanics Co. Ltd.
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