Method of operation of air cleaner

Details Method of operation of air cleaner Method of operation of air cleaner

1990-06-05

1992-01-28

Ro, Bentsu

Electricity: motive power systems

Miscellaneous

318449, 55272, 55DIG34, 165 16, 236 491, B03C 300, B24F 7007, B60H 124

Patent

active

050846590

ABSTRACT:
A concentration of a given gas is detected by a gas sensor when a command signal for turning off the gas sensor is present, the concentration is stored and the gas sensor is turned off. The invention detects the concentration of the given gas by the gas sensor when a command signal for turning on the gas sensor is present and determines a reference value by choosing either the stored concentration or the concentration detected after the gas sensor is turned on whichever is lower at an instant a predetermined interval after the gas sensor is turned on. A blower motor of an air cleaner is controlled in accordance with the difference between the reference value and the concentration detected after the gas sensor is turned on. In a second method, the concentration is stored in a nonvolatile memory just before the air cleaner is turned off. In a third method, a given value may be set as the reference value replacing the stored concentration if the given value is smaller than the stored concentration. In a fourth method, only when the stored concentration data is empty, the given value may be used for the reference.

REFERENCES:
patent: 4992965 (1991-02-01), Holter et al.

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