ELECTRIC WATER HEATER OF TRANSFORMER TYPE Russian patent published in 2000 - IPC

FIELD: electrical engineering. SUBSTANCE: proposed electric water heater presents three-phase transformer with space magnetic circuit which legs carry primary winding. Secondary winding is made of tubes placed between legs. Specific feature of design of each phase of secondary winding lies in its manufacture in the form of two tubes concentrically put one inside another. Upper ends of tubes are interconnected and lower ends are linked to short-circuiting discs. Tube of smaller diameter is connected to one disc and tube of larger diameter is linked to another disc. Structure of secondary winding creates together with short-circuiting discs and case jacket a sealed chamber housing magnetic circuit with primary winding. Water is heated as flows by power released by secondary winding with current passing through it. EFFECT: enhanced heating efficiency. 1 dwg