| 摘要 |
The device (6) includes a sealed casing (10) provided, in its lower part, with a bowl (22) for collection of a residual liquid, and an assembly (30) for purging the residual liquid which comprises means for evacuation of the liquid collected in the bowl and means for connecting the casing to the open air. The means for evacuation of the liquid include an orifice (36) formed in the wall of the casing substantially at the level of the bottom of the bowl (22). The means for connection to the open air include an orifice (34) formed in the wall of the casing (10) substantially opposite the orifice (36) for evacuation of the liquid. A single obturator (40) is displaceable between a sealing position in which, on the one hand, its upper part forms a tight plug (42) for the orifice for entry of air (34) and, on the other, its lower part forms a tight plug (48) for the orifice for evacuation of the liquid (36), and a position for purging the liquid in which, on the one hand, its upper part is disengaged from the orifice for entry of air to allow connection of the casing to the open air and, on the other, its lower part is disengaged from the orifice for evacuation of the liquid to allow gravity purging of the casing.
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