| 摘要 |
PURPOSE:To invariably feed a fixed quantity of hot water by locating a circulat ing path communicated to the side section of a fixed-quantity tank at the upper position than the high water level of the tank. CONSTITUTION:A fixed-quantity tank 37 is provided at the upper section of a main body 30, the fixed-quantity tank 37 is communicated to a tank 32 by a circulating path 39, and the circulating path 39 is opened at the upper position than the high water level of the tank 32. Water is filled in the tank 32, and a heater 34 is excited. An automatic temperature adjuster 36 detects boiling and controls the excitation of the heater 34 to preserve heat at about 90 deg.C. An operation switch 56 is operated to operate a pump 40, and hot water is guided to the fixed-quantity tank 37 via a water lifting pipe 41. When the opera tion time of the pump 40 is set to about 4 sec by a control circuit 54, the water level of the fixed-quantity tank 37 reaches the fixed-quantity water position 38, hot water overflows from the circulating path 39 and is returned to the tank 32 through a check valve 57, and the operation of the pump 40 is stopped by the control circuit 54 in about 4sec after the operation. A fixed quantity of hot water invariably flows into the fixed-quantity tank 37 and drips through a pouring out port 42 by one operation of the pump 40. |
