Humidifier control system

Details Humidifier control system Humidifier control system

1997-05-01

1999-05-11

Hofsass, Jeffery A.

Communications: electrical

Condition responsive indicating system

Specific condition

84453, 261104, G08B21/00

Patent

active

059032235

ABSTRACT:
There is provided a humidifier control system including a water reservoir having a top opening. A pair of wicking pads extend into the reservoir and around a tube which extends over the top opening. An electrical heating element is received inside the tube. First and second spaced apart moisture sensor elements are attached to the tube and are in contact with the wicking pads. The sensor elements conduct electricity in the presence of moisture on the wicking pads and do not conduct electricity in the absence of moisture on the wicking pads. The sensor elements are attached to an electrical circuit which includes a switch and an alarm. When there is moisture on the wicking pads, the switch is on and normal current flows through the heating element and the switch. When there is not moisture on the wicking pads, the switch is turned off and the current through the heating element is reduced to a minimal level, and the alarm is turned on.

REFERENCES:
patent: 2600659 (1952-06-01), Koch, Jr.
patent: 3304066 (1967-02-01), Vieceli et al.
patent: 3339578 (1967-09-01), Smith
patent: 3580158 (1971-05-01), Scholle et al.
patent: 4150372 (1979-04-01), Foote
patent: 4796017 (1989-01-01), Merenda
patent: 5428347 (1995-06-01), Barron
patent: 5428348 (1995-06-01), Gault
patent: 5625345 (1997-04-01), Stark et al.

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