| 摘要 |
Vacuum waste evacuation system (1) for a toilet module in a public transportation vehicle, comprising a sanitary appliance (2) connected to a wastewater tank, and means of depressing said tank for vacuum evacuating the waste when a user actuates a discharge button of the sanitary appliance (2), which is characterized in that it comprises a pinch tube (5) valve (3) to communicate the sanitary appliance (2) with the wastewater tank, and a first control valve (9) of said pinch tube (5) valve (3) which is configured to allow, in a first resting position, the inlet of air or gas to actuate the pinch tube (5) to a closed position, and to allow, in a second active position, the outlet of the air or gas with the aim of returning the pinch tube (5) to an open position, when the user actuates the discharge button of the sanitary appliance (2). |
