SPA control circuit

Details SPA control circuit SPA control circuit

1993-09-13

1996-12-17

Paschall, Mark H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219485, 219519, 219506, 45412, 361 15, H05B 102

Patent

active

055850251

ABSTRACT:
A spa control circuit is provided for regulating a water circulation and heating system in a spa or hot tub or the like. The control circuit comprises a thermostat circuit and a high temperature limit circuit, both of which receive a temperature signal from a common temperature sensor. A safety circuit responds to sensor failure to prevent operation of the circulation/heating system. A latching relay ensures system reset in the same operational state following a power outage. An arc suppression circuit substantially prevents arc damage to relay contacts subjected to frequent opening and closing in response to on-off cycling of the thermostat circuit. In a preferred form, the control circuit components are mounted within a compact housing having a heat transfer member in heat exchange relation with circulating spa water, whereby the spa water is used to prevent overheating of the control circuit components.

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