PRESSURE TANK

摘要

PROBLEM TO BE SOLVED: To provide a pressure tank in which the structure of an abnormality water reception detector installed to the pressure tank is simplified and an increase in cost can be prevented while the abnormality water reception detector can detect the abnormality of the pressure tank surely. SOLUTION: The pressure tank has the abnormality water reception detector 66 with light-emitting means 39 and 41 emitting detecting light to a bladder 53, a light-receiving sensor 43 receiving reflected light generated by reflection by the bladder 53 of detecting light and outputting a signal when the intensity of reflected light reaches a fixed value and abnormality discriminating means 47, 49 and 51 discriminating the presence of the abnormality of the pressure tank 52 on the basis of the signal.