Electronic temperature control

Details Electronic temperature control Electronic temperature control

1980-09-08

1982-11-30

Wayner, William E.

Automatic temperature and humidity regulation

Closed fluid heaters

Safety cut-out

219505, 236 91G, 323366, F22B 3742, H05B 102

Patent

active

043612741

ABSTRACT:
An electronic temperature control circuit is disclosed for use with swimming pool and spa heaters. The circuit employs a thermistor for sensing water temperature, and provides temperature control with a narrow differential. Safety circuits are also employed to prevent injury to the user or to the heater in the event of a component failure. The temperature control circuit is provided with means for presetting two desired temperature settings and for selecting one of the preset temperature settings for control. Remote control circuits are also disclosed for use with the temperature control circuit which permit temperature selection, temperature setting and a visual indication of heater status from a location remote from the heater.

REFERENCES:
patent: 2138593 (1938-11-01), Breitenstein
patent: 2932784 (1960-04-01), Hampton
patent: 3275802 (1966-09-01), Vandivere et al.
patent: 3456455 (1969-07-01), Sapir
patent: 3819905 (1974-06-01), Trostler
patent: 3843049 (1974-10-01), Baysinger

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