ELECTRIC WATER HEATER Russian patent published in 2001 - IPC

FIELD: instant warming of water coming from water supply system for domestic needs. SUBSTANCE: water supply pipe-line 1 and water discharge pipe-line 2 are connected to body of electric water heater. Spring-loaded valve 16 with hole 17 is installed in pipe-line 3. Part of wall of body 1 is made movable in the form of disc 6 with rod 7 interacting with power switch 5 of electric heater 4. Disc 11 of variable thickness with handle 13, shaft 10 and spring 15 forming device interlocking interaction of movable wall 6 with power switch 5 are placed between rod 7 and power switch 5. Availability of interlocking device in electric water heater makes it feasible to produce both hot and cold water. If there is no water in water supply system electric water heater is automatically switched off and handle 13 is set into blocking position which excludes involuntary switching on of electric water heater. EFFECT: improved functional reliability and safety of electric water heater. 1 cl