초록 ▼

An automatic and improved electrical control for an automatic hydronic zone valve including a switching device for opening and closing solenoid valves based on adjustable temperature settings. Specifically, the preferred system involves a solenoid-controlled valve in which the solenoid is activated

An automatic and improved electrical control for an automatic hydronic zone valve including a switching device for opening and closing solenoid valves based on adjustable temperature settings. Specifically, the preferred system involves a solenoid-controlled valve in which the solenoid is activated and deactivated by an electrical control circuit which relies on an external thermostatic switch and an internal relay to open and alternately close the following sub-circuits: a solenoid control sub-circuit which is directly connected to the valve solenoid, an AC to DC converter, relay control circuitry, a relay switch connection to a water circulator system and LED sub-circuits indicating power status and/or activation of the heating system. The solenoid control sub-circuit includes a series thermistor and a parallel capacitor to, respectively, slow the provision of electrical current to the solenoid to avoid "water hammer," and, quiet the electronic hum of the solenoid. Moreover, the current invention also involves simplified wiring such that only two wires each are necessary for thermostat connection, for power supply connection and for water circulator connection. But for these three external connection sites, all the other control circuit elements are disposed in a single compact unit, preferably housed on the solenoid valve itself.

대표청구항 ▼

[ Accordingly, what is claimed:] [1.] An electrical control system for an automatic hydronic zone valve comprising: a solenoid control circuit connectable to a solenoid load, said solenoid control circuit having a thermistor connectable in series with said solenoid load, said solenoid load being ope

[ Accordingly, what is claimed:] [1.] An electrical control system for an automatic hydronic zone valve comprising: a solenoid control circuit connectable to a solenoid load, said solenoid control circuit having a thermistor connectable in series with said solenoid load, said solenoid load being operative to open and close said hydronic zone valve; said solenoid control circuit further comprising a capacitor connected in parallel with said solenoid load, said capacitor being operative to reduce solenoid hum; said solenoid control circuit further being connected to a relay switching circuit and said relay switching circuit further being connected to a thermostatic switch and to a circulator control circuit.