Automatic temperature and humidity regulation – Closed fluid heaters – Top burner control
Patent
1995-08-18
1997-06-17
Wayner, William E.
Automatic temperature and humidity regulation
Closed fluid heaters
Top burner control
236 78D, 126374, 99332, F23N 108, A47J 2762
Patent
active
056390238
ABSTRACT:
The invention is directed to a method of controlling the water temperature in a beverage-brewing apparatus, wherein the water is initially heated in an open water reservoir up to the boiling point, said boiling point being reached in that the water is heated from the initial temperature T.sub.i up to a temperature T.sub.HIGH at which it is ensured that the water does not boil as yet under conventional environmental conditions, in that the rate of change of the temperature dT/dt during heating from the initial temperature T.sub.i to the temperature T.sub.HIGH is determined, in that on reaching the temperature T.sub.HIGH a period of time t.sub.heiz is determined from the difference between 100.degree. C. and T.sub.HIGH as well as from the rate of change of the temperature dT/dt, and in that on reaching the temperature T.sub.HIGH the water continues to be heated during the period of time t.sub.heiz. The temperature T.sub.HIGH is 75.degree. C., approximately.
REFERENCES:
patent: 4172555 (1979-10-01), Levine
patent: 4465228 (1984-08-01), Mori et al.
patent: 5090305 (1992-02-01), Lehman
Hild Holger
Schotte Dietwald
Braun Aktiengesellschaft
Wayner William E.
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