| 摘要 |
The hood (1) has a tubular duct (2) in axial correspondence with the hole provided in the base thereof and in whose inside the overflow tube (3) is guided. Between the duct (2) and the side wall of the hood (1) the pneumatic chamber (11) in which the float (4) moves is formed. The cock (19) filling the tank with water has in its radial connecting nozzle of the flexible tube (21) some outer axial direction grooves (22) that remain partially covered by said flexible tube (21), thus admitting air that will be provided with the water through the lower area of the hood (1), where the latter incorporates a connecting nozzle, the air raising between the interstices of the float (4) and hood (1) to fill the chamber (11). The hood (1) includes in the bottom thereof a deflector (23) facing the water and air intake, to direct the latter towards the inside of the hood and the deflector (23) having an alternative air venthole.
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