Control valve systems for gas water heaters

Details Control valve systems for gas water heaters Control valve systems for gas water heaters

1981-06-11

1984-02-14

Favors, Edward G.

Automatic temperature and humidity regulation

Closed fluid heaters

Flow controlled

122447, 122448S, 126350R, 126351, F22B 3500, F28F 2700

Patent

active

044311320

ABSTRACT:
A control valve system for a gas-fired, instantaneous water heater is disclosed. The valve has a "snap" action constructed to inhibit the supply to the burner of insufficient amounts of gas to ensure reliable ignition. In one example, a flexible diaphragm has opposite sides connected via respective passages to receive pressures upstream and downstream of a restriction in a water flow path. The diaphragm opens a gas valve in response to a predetermined flow of water along the path. In order to provide the "snap" action, a further passage is provided that links the two passages coupled to the diaphragm and contains a ball that can block the further passage only when the water flow is sufficient to open the gas valve sufficiently for an ignitable quantity of gas to flow to the burner.

REFERENCES:
patent: 2023568 (1935-12-01), Albersheim et al.
patent: 2258590 (1941-10-01), Merten
patent: 3722523 (1973-03-01), Kawabata et al.

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