Electric heater, in particular for household appliance for preparing hot beverages
AssigneeI.R.C.A. S.P.A. Industria Resistenze Corazzate E Affini
InventorsStefano Wedam, Frederico Zoppas
Life of this patent
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Abstract
An electric heater (100, 101), in particular for a device or household appliance for preparing hot beverages, comprising—a metal body (4); —at least one electric resistor (1, 6) arranged in the metal body (4); —a first pipe (2) and a second pipe (3) arranged in the metal body (4); wherein the first pipe (2) and the second pipe (3) are mutually distinct and adapted to be connected to each other so that a fluid can pass from the first pipe (2) to the second pipe (3) and/or vice versa; wherein the inner section of the second pipe (3) is greater than the inner section of the first pipe (2).
Claims17
An electric heater for a device or household appliance for preparing hot beverages, the electric heater comprising:
- a metal body;
- at least one electric resistor arranged in the metal body;
- a first pipe and a second pipe arranged in the metal body;
- wherein the first pipe and the second pipe are mutually distinct and adapted to be connected to each other so that a fluid can pass from the first pipe to the second pipe or vice-versa;
- and
- wherein an inner cross-sectional area of the second pipe is from 3 to 22 times greater than an inner cross-sectional area of the first pipe, the second pipe is completely straight, and an elongated helical turbulator being arranged coaxially inside said second pipe, the elongated helical turbulator having a helical-shaped external surface and without orifices formed between an interior channel of the elongated helical turbulator and the helical-shaped external surface thereof for passage of liquid through the elongated helical turbulator, wherein scaling from liquid flowing through the second pipe accumulates on the elongated helical turbulator such that a frequency of descaling maintenance operations is reduced because of an enlarged inner cross-sectional area of the straight second pipe and the elongated helical turbulator extending coaxially therein.
Dependencies are inferred from the claim text.