Ventilation element for a storage tank

Abstract

The invention relates to a storage tank ( 10 ) for receiving a medium ( 12 ) that can be frozen, in particular a reducing agent, comprising a ventilation unit ( 34, 36; 72 ) and a crucible-shaped container ( 22 ) introduced in the storage tank ( 10 ). An air chamber ( 50 ) in the crucible-shaped container ( 22 ) is connected via a ventilation line ( 60 ) or an overflow opening ( 40 ) to an air chamber ( 48 ) of the storage tank ( 10 ), which is ventilated via a ventilation unit ( 34, 36; 72 ).

1 - 10 . (canceled) 
     
     
         11 . A storage tank ( 10 ) for receiving a medium ( 12 ) capable of freezing, having at least one aeration/ventilation line ( 34 ,  36 ;  72 ) and a cup-shaped container ( 22 ) introduced into the storage tank ( 10 ), characterized in that an air space ( 50 ) in the cup-shaped container ( 22 ) is connected via a ventilation line ( 60 ) to an air chamber ( 48 ) of the storage tank ( 10 ), which is aerated and ventilated via the at least one aeration/ventilation line ( 34 ,  36 ;  72 ). 
     
     
         12 . The storage tank ( 10 ) as claimed in  claim 11 , characterized in that a heater ( 26 ) is accommodated in the cup-shaped container ( 22 ) and a heatable suction lance ( 24 ) surrounded by the reducing agent ( 12 ) extends through the cup-shaped container ( 22 ). 
     
     
         13 . The storage tank ( 10 ) as claimed in  claim 11 , characterized in that the ventilation line ( 60 ) is made of a reducing agent-resistant elastomer. 
     
     
         14 . The storage tank ( 10 ) as claimed in  claim 11 , characterized in that the ventilation line ( 60 ) extends from a first connection ( 62 ) of a lid ( 32 ) of the cup-shaped container ( 22 ) to a second connection ( 64 ) of a tank lid ( 18 ) of the storage tank ( 10 ). 
     
     
         15 . The storage tank ( 10 ) as claimed in  claim 14 , characterized in that the first connection ( 62 ), the second connection ( 64 ) and a further connection ( 70 ) for receiving the aeration/ventilation line ( 72 ) are injection molded onto the tank lid ( 18 ) or the storage tank ( 10 ). 
     
     
         16 . The storage tank ( 10 ) as claimed in  claim 14 , characterized in that the ventilation line ( 60 ) is sealed off at the connections ( 62 ,  64 ) by sealing profiled sections ( 76 ). 
     
     
         17 . The storage tank ( 10 ) as claimed in  claim 11 , characterized in that the air space ( 48 ) and the air space ( 50 ) are aerated and ventilated via separate aeration/ventilation lines ( 34 ,  36 ) in each case. 
     
     
         18 . The storage tank ( 10 ) as claimed in  claim 17 , characterized in that the aeration/ventilation line ( 34 ,  36 ;  72 ) for constituting the fording capability comprises at least one flexible hose, which extends through a wet chamber ( 80 ) into a dry chamber ( 82 ). 
     
     
         19 . The storage tank ( 10 ) as claimed in  claim 11 , characterized in that the aeration/ventilation lines ( 34 ,  36 ) in each case comprise a ventilation element ( 42 ) formed in the manner of a tablet. 
     
     
         20 . The storage tank ( 10 ) as claimed in  claim 14 , characterized in that the ventilation line ( 60 ) is sealed off at the connections ( 62 ,  64 ) by sealing profiled sections ( 76 ), the sections having a Christmas tree profile.