| 摘要 |
PURPOSE:To execute display during extraction and permit the visual confirmation for display from outside by flashing a display lamp through a microswitch by the operation of a shape memory alloy spring. CONSTITUTION:When hot water flows in a water introducing pipe 8, a shape memory alloy spring 12 operates, and an operating plate 14 is operated against the force of a bias spring 13, and a microswitch 15 operates to put ON a display lamp 16. Since, when extraction is completed, the temperature of the water introducing pipe 8 becomes lower than a set temperature of the shape memory alloy spring 12, the bias spring 13 returns the operating plate 14 to the original state against the force of the shape memory alloy spring 12. Accordingly, the contact point of the microswitch 15 is released, and the display lamp 16 comes OFF. The display lamp 16 is put ON from the discharge of the hot water to the completion of extraction, by setting the set temperature of the shape memory alloy spring 12 a little lower than the temperature of the water introducing pipe 8 on the completion of extraction, and the display during extraction is permitted. The display during extraction can be confirmed visually from outside, and the erroneous pulling out of a busket and decanter is prevented, and safe use is permitted. |
