Air conditioner drain blockage alarm

Details Air conditioner drain blockage alarm Air conditioner drain blockage alarm

1989-08-21

1990-06-26

Orsino, Jr., Joseph A.

Communications: electrical

Condition responsive indicating system

Specific condition

340616, 200 6104, 62129, G08B 2100

Patent

active

049375598

ABSTRACT:
An air conditioner drain blockage alarm system which is designed for application to both horizontally and vertically-mounted heating and air conditioning units, which alarm includes in a preferred embodiment, both a normally open drain line liquid level switch and a normally closed drain pan liquid level switch for sensing blockage of a drain line in both the drain line itself and in the condensate drain pan which collects condensate from the air conditioning unit. In addition to the drain line and drain pan liquid level switches, the system is characterized by an alarm which audibly indicates a high water condition in either the condensate drain pan or the drain line and a manual override switch for manually silencing the alarm. In a preferred embodiment, the system is wired through the existing thermostat in the heating and air conditioning unit to facilitate deactivating the air conditioning system by the drain pan liquid level switch when the condensate drain pan is subject to overflow.

REFERENCES:
patent: 3757316 (1973-09-01), Fiorenzo
patent: 4091365 (1978-05-01), Allen
patent: 4633673 (1987-01-01), Morrison et al.
patent: 4787212 (1988-11-01), Hessey

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