| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to introduce a disinfecting gas into a space of a flushing type closed space and to draw out in from the space, by arranging an element to be driven slidably in a housing of a gas flow allowing/restricting means to perform a feedback for positioning to a means for displacing the element to be driven. SOLUTION: A connector 654 of a seal-free valve is so formed and arranged to let a fluid communicate between it and a tube or a pipe of a disinfecting device, and when an element to be driven in the body of the valve is held at an opened position, the fluid flows through the body 610 of the valve. A magnetic position sensor 670 at the opened position and a magnetic position sensor 674 at the closed position area arranged to sense the existence of smaller permanent magnets 634 separately. Thus, the feedback control allows the sensors 670 and 674 to work almost synchronously and in this case, the sensors 670 and 674 drive an air pressure device to make a magnet 634 completely align with the sensors 670 and 674 to operate a block 628. |
