ELECTRIC WATER HEATER Russian patent published in 1997 - IPC

FIELD: water heating systems. SUBSTANCE: electric water heater has housing 1 with electric heating elements mounted inside it; heating elements 2 are secured to upper cover 6 of housing 1. Cover 6 is made from heat-conducting material for thermal contact. Cold water supply branch pipe 4 is connected to lower portion of housing 1 and hot water discharge branch pipe 5 is connected to upper cover 6 of housing 1. Water heater is also provided with safety thermoswitch 7 mounted on outside of housing 1 for thermal contact, water temperature controller with sensor mounted inside housing 1 in water-tight heat-conducting casing 8 which is connected to upper cover 6 of housing 1 for thermal contact. Electric heating elements 2 are connected to supply mains through thermocontroller and safety thermoswitch connected in series. Height of casing 1 does not exceed magnitudes 2,5λF_w, , where α is coefficient of thermal conductivity of material of casing, V/(mk); F_w is area of cross section of side wall of casing, sq.m. EFFECT: enhanced reliability. 2 cl, 5 dwg