Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1986-07-23
1987-12-15
Bartis, Anthony
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219298, 219306, 219309, 219321, 219328, 219330, 219484, 219486, 237 8R, H05B 102, F24H 110, G05D 2300
Patent
active
047135255
ABSTRACT:
A microcomputer operates in response to user selected flow rate and water temperature inputs to calculate the temperature difference between the cold water input and the hot water delivery output from a multisection continuous flow electric water heater wherein a plurality of electric resistance heater elements contained therein provide 5.degree. F. temperature increase increments each, while one heater element is comprised of three sub-sections, two of which provide 2.degree. F. temperature increments and one section provides a 1.degree. F. temperature increase increment. The microcomputer constantly monitors the water temperature difference and controls activation of the required heater elements or element sub-sections to heat the water to a selected delivery temperature with an output solenoid being additionally controlled to provide delivery at a selected flow rate. The microcomputer furthermore displays the delivered water temperature and in the event non-heated water is desired, ignores any selected temperature commands and controls only the flow rate. Should the user select an invalid set of flow and temperature values, the microcomputer causes system operation to occur at the closest possible allowable conditions of flow rate and temperature.
REFERENCES:
patent: 3596588 (1971-08-01), Moss
patent: 4337388 (1982-06-01), July
patent: 4410791 (1983-10-01), Eastep
patent: 4638147 (1987-01-01), Dytch et al.
"Instant Hot Water Flows from Cold Water Pipe", Popular Science, Jul. 1961, pp. 44, 45, 46 and 182.
Bartis Anthony
Kowah, Inc.
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