| 摘要 |
PCT No. PCT/EP94/00712 Sec. 371 Date Oct. 12, 1995 Sec. 102(e) Date Oct. 12, 1995 PCT Filed Mar. 9, 1994 PCT Pub. No. WO94/20409 PCT Pub. Date Sep. 15, 1994An automatic virtually leak-free filling system for filling a liquid tank (1), comprises a bulk supply tank (3), a pump (12, 22) and a liquid line (5, 11) connected to the bulk supply tank which at its open end is provided with a coupling (9) for a manually detachable, virtually leak-free to a filling neck (25) of a liquid inlet (10) to the liquid tank (1). The system is moreover furnished with an overfill protection circuit which automatically cuts off the liquid supply to the liquid tank (1) on reaching a predetermined filling level in the liquid tank (1). According to the invention, the liquid tank (1) is furnished with a localized vapour outlet (15) which, at least during operation, connects to a vapour return line (13). The overfill protection circuit comprises a float valve (20) which is capable of cutting off the vapour return line (13) when the predetermined filling level is reached. The overfill protection further comprises a vapour flow detector (16) which is interposed in the vapour return line (16) and is capable of producing an electrical output signal when any vapour in the vapour return line (13) ceases to flow. This output signal is fed to the pump (12, 22) causing the further supply of liquid to be cut off. |
