Patent ID: 7826723
Filing Date: 2010-11-02
Classification: F24D

Abstract:
1. An automatic circulation device of warm water comprising: a boiler formed with a feed port and a discharging port at the upper side and the lower side thereof, respectively, receiving cool water through the feed port, and discharging the warm water through the discharging port; an electric heater horizontally installed at the inner lower side of the boiler without contacting the inner lower side and supplying heat to the interior of the boiler; a water tank connected to the feed port of the boiler by means of a feed pipe and feeding the cool water to the boiler; a heat exchanging section connected to the discharging port of the boiler by means of a discharging pipe and to the water tank by means of a circulation pipe, and transferring heat to the exterior; and a feed valve and a discharging valve respectively installed to the feed pipe and the discharging pipe, and automatically opened and closed by vapor pressure in the boiler.