| 摘要 |
PURPOSE:To minimize an error and to detect a water-level with high accuracy by detecting a temperature of drain water in a heat exchanger, correcting and approximating a specific gravity difference, and varying automatically an operation set value, in a feed water heater device. CONSTITUTION:A thermometer 15 and a thermometer 16 are installed to a drain water reservoir part of a feed water heater 1 and a float type water-level controller 9, respectively, a drain temperature of each part is measured, and expansion of an enclosure in these thermometers is led to a correcting device 17. The first and the second bellows 17a, 17b are incorporated in the correcting device 17, are opposed so as to be applied to an operational expression of a-b, and a correction of a water-level variation which calculates in advance a temperature difference is linearlized by a cam, a lever, a gear, etc., is led to a control part 9c through a connecting mechanism 18, so that a liquid face adjusting knob is moved automatically. |
