| 摘要 |
PURPOSE:To prevent an accident of mixing refrigerant with insulating medium by a method wherein the pressure of refrigerant and that of insulating medium in tank are equalized all the time. CONSTITUTION:A movable wall 16 is provided on the boundary of bellows 15. In this constitution, the pressure of refrigerant 7 at the pressurizing part on one end of the bellows 15 can be exerted for the medium filled in the pressurizing part on the end of the bellows 15. On the contrary, the pressure of the medium 14 filled in the pressurizing part on the other end can be exerted for the refrigerant equalizing the pressure of the refrigerant 7 and that of the medium 14. Thus an accident of mixing refrigerant 7 with medium 14 may be prevented from happening by means of equalizing the pressure of the refrigerant 7 and that of the medium 14 easily producing foil wound transformer with high safety. |
