ELECTRIC WATER HEATER HAVING TRANSVERSE RESERVOIR WITH SWELLING AT TOP AND BOTTOM OF RESERVOIR TANK

PURPOSE:To improve the hot water delivery performance by disposing a hot water delivery opening in the swelling at the top of a hot water reservoir tank, and a feed water opening, a heater and a baffle opposite to the feed water opening to reduce the flow speed at the bottom swelling. CONSTITUTION:The bottom of a transverse hot water reservoir tank 1 is made into a swelling, and a heater 5, a feed water opening 4 and a baffle 4 are disposed in said bottom swelling. The top of the tank 1 is made into a swelling, and a hot water delivery opening 2 is disposed in said top swelling. A thermostat 6 and tank stays 7 are attached to suitable locations, and the hot water reservoir, tank 1 is covered with a heat insulating material 8. This way, the full tank volume can be heated with the water capacity below the heater 5 kept to the minimum. Further, the mixture of hot water and cold water due to the rushing cold water from the feed water opening 3 can be controlled to the minimum, and air bubbles generated during the heating can be completely collected to the hot water delivery opening 2 for venting, allowing the hot water in the tank to be successively and efficiently delivered.