| 摘要 |
PURPOSE:To arrange that extraction display time does not change with boiling temperature and can be accurately confirmed by the lighting of a display light by switching on and off the display light through a temperature detection circuit operating by means of the outputs of a first temperature detection element provided within a water introduction pipe and a second temperature detection element provided in a container. CONSTITUTION:A first temperature detection element 12 is installed in a water introduction pipe 8, and fixed by means of a seal material 3 formed out of rubber. The second temperature detection element 14 whose purpose is to measure the hot water temperature inside a container 1, is provided in the vicinity of the surface of the hot water. A temperature detection circuit 15 receives the temperature of the second temperature detection element 14, and sets an output reference temperature to a display light 16, and at the same time compares it with the first element 12 temperature, and controls output to the display light 16. When the first element 12 temperature is higher than the output reference temperature, the circuit 15 conducts output to the light 16 and is lighted. The lighting of the light 16 continues as long as the first element 12 temperature is higher than the output reference temperature, and when the temperature lowers, the circuit 15 stops output to the light 16, and the light 16 goes out. |
