| 摘要 |
Odour extraction system comprising a fluid tank valve, primarily for extracting malodorous air from a toilet bowl (9) and preventing bad odours from getting into the environment, comprising a fan (5) connected to the sha ft of an electric motor (6), said fan (5) being disposed in a pipe chamber (4) that is located between the free end of a suction piece (2) and an outlet piece (7), where said suction piece is adapted for connecting to the flush pipe (1) of the toilet bowl (9) and where said outlet piece (7) is hermetically joined to the sewer pipe (8), with said pipe chamber (4) comprising a fluid tank valve (3) adapted for airtight closure. The fluid ta nk valve (3) is implemented as part of the pipe chamber (4), the fluid tank (11 ) of the fluid tank valve (3) comprises a suction opening (15) and an outlet opening (13), with a closing means (10) being hermetically joined to said suction opening (15), said closing means (10) comprising a free end at the downstream extremity thereof, with said free end submerging into the fluid (12) in the fluid tank (11) and with said free end rising from said fluid (1 2) under the effect of pressure difference.
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