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).

Abstract: A device for heating a liquid includes a metal body, a conduit for the passage of the liquid to be heated, and one or more heating elements. The conduit and the one or more heating elements are incorporated in the body which forms a wall around the conduit and the one or more heating elements. Heat generated by the one or more heating elements is transmitted to the liquid to be heated by conduction. The body is provided with a plurality of openings which are separated from each other, having a depth equal to wall thickness. At least two first openings of the plurality of openings are on the conduit, and at least two second openings of the plurality of openings are on the one or more heating elements.

Abstract: A thermal block (100) for heating a liquid, comprises: —a tube (200) for the passage of liquid, provided with an inlet (3) and an outlet (4) and with at least one segment (200) with corrugated walls (6), —a massive block (1) co-molded outside said pipe (200) so that the inlet (3) and the outlet (4) are outside the massive block (1), —one resistive element (5) for heating the massive block (1).

Abstract: The invention provides a device (200, 300, 400) for heating a continuous flow fluid. Said device (200, 300, 400) consists of a steel conduit (3, 3?, 3?) through which the fluid to be heated flows and of at least one sheathed resistor (2, 2c, 2d, 2e, 2f) that is parallel to the steel conduit (3, 3?, 3?) and that is in thermal contact therewith. The steel conduit (3, 3?, 3?) and the at least one heating element (2, 2c, 2d, 2e, 2f) are incorporated in a die-casting element made of an aluminium alloy.

Abstract: A thermal block (100) for heating a liquid, comprises: a tube (200) for the passage of liquid, provided with an inlet (3) and an outlet (4) and with at least one segment (200) with corrugated walls (6), a massive block (1) co-molded outside said pipe (200) so that the inlet (3) and the outlet (4) are outside the massive block (1), one resistive element (5) for heating the massive block (1).