Continuous-flow water heater, useful e.g. in coffee machines, has internal coating of fluorine-free nanocomposite to prevent deposition of scale

摘要

Continuous-flow water heater (A) comprises: (i) a flow tube (2) having, on the internal wall, a coating (3) that is made of a nanocomposite and is practically free of fluorine; and (ii) a heating element (4) in thermal contact with (2).