Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Patent
1989-02-10
1991-02-05
Bartis, Anthony
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
222108, 2221465, 392449, H05B 100, F24H 118, B67D 562
Patent
active
049907468
ABSTRACT:
There is provided a heater which includes a vessel in which liquid is contained, and a heater to heat the liquid, the vessel having an inlet by which liquid can be fed into the vessel, and an outlet through which liquid may flow to a point of delivery. The inlet comprises a supply conduit connected to a liquid supply, and liquid flowing along the supply conduit is mixed with a gas. A gas trap is provided to collect gas passing with the liquid from the supply conduit within the vessel, and includes an opening to release collected gas into the vessel, whereby at least when the liquid flow along the supply conduit is stemmed, the released gas provides an expansion space in the vessel into which liquid can expand during subsequent heating, the expansion space being vented from the vessel. An air control valve restricts the amount of gas available for mixing with the liquid as the liquid flow rate through the supply conduit increases, thereby preventing aeration of the liquid.
REFERENCES:
patent: 3581057 (1971-05-01), Meyers
patent: 4441902 (1984-04-01), Jardine
patent: 4513887 (1985-04-01), Wicke et al.
Bartis Anthony
Heatrae Sadia Heating Limited
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