Module for the metered provision of a liquid
View Patent ↗A module for the metered provision of a liquid includes a chamber having a chamber wall enclosing, at least partially, a chamber space of the chamber. The chamber is surrounded at least partially by a hood. At least one cavity is arranged between the hood and the separated chamber and the hood is heatable.
1. An apparatus ( 2 ) for metered provision of a liquid exhaust gas purification additive, the apparatus ( 2 ) comprising:
a tank ( 3 ) having:
an interior ( 4 ) configured to store the liquid, and
a tank bottom ( 6 ); and
a module ( 1 ) inserted into the tank bottom ( 6 ), the module ( 1 ) having:
a chamber ( 5 ) having a chamber wall ( 7 ), the chamber wall ( 7 ) at least partially enclosing a chamber space ( 41 );
a hood ( 8 ) at least partially surrounding the chamber ( 5 );
an electric heating element ( 13 ) arranged in the chamber space ( 41 ); and
at least one cavity ( 9 ) arranged between the hood ( 8 ) and the chamber ( 5 ),
wherein the hood ( 8 ) and the electric heating element ( 13 ) are arranged with respect to one another so that the hood ( 8 ) is heatable by the electric heating element ( 13 ),
wherein the chamber wall ( 7 ) has a chamber opening ( 10 ) closed by the hood ( 8 ),
wherein the hood ( 8 ) is sealed at the chamber opening ( 10 ) by a seal ( 12 ) that surrounds the electric heating element ( 13 ), and
wherein the hood ( 8 ) is arranged in the interior ( 4 ) of the tank ( 3 ).
2. The apparatus ( 2 ) according to claim 1 , wherein the hood ( 8 ) comprises metal.
3. The apparatus ( 2 ) according to claim 2 , wherein the hood ( 8 ) is coated with a plastic layer ( 11 ).
4. The apparatus ( 2 ) according to claim 1 , wherein the hood ( 8 ) comprises plastic and at least one heat distributing structure ( 31 ) is arranged so as to be integrated into the hood ( 8 ).
5. The apparatus ( 2 ) according to claim 1 , wherein the hood ( 8 ) is connected in a material-to-material manner to the chamber wall ( 7 ) at the chamber opening ( 10 ).
6. The apparatus ( 2 ) according to claim 1 , wherein the hood ( 8 ) is connected at the chamber opening ( 10 ) to the electric heating element ( 13 ) arranged in the chamber space ( 41 ).
7. The apparatus ( 2 ) according to claim 1 , wherein the hood ( 8 ) has a plurality of slots ( 14 ) configured to divide the hood ( 8 ) into web-like sections ( 15 ) extending from a top side ( 16 ) to an underside ( 44 ) of the chamber ( 5 ) of the tank bottom ( 6 ).
8. The apparatus ( 2 ) according to claim 1 , wherein the hood ( 8 ) has at least one slot ( 14 ) configured to thermally insulate a region of the hood ( 8 ).
9. The apparatus ( 2 ) according to claim 1 , wherein the hood ( 8 ) has a ventilating opening ( 17 ) connecting the at least one cavity ( 9 ) at a top side ( 16 ) of the chamber ( 5 ) to the surroundings of the chamber ( 5 ).
10. The apparatus ( 2 ) according to claim 1 , wherein the hood ( 8 ) has at least one spacer element ( 36 ) on an inner side ( 18 ) oriented towards the chamber ( 5 ), which at least one spacer element ( 36 ) bears against the chamber wall ( 7 ).
11. A motor vehicle ( 20 ), comprising:
an internal combustion engine ( 21 );
an exhaust gas treatment apparatus ( 22 ) configured to purify exhaust gases of the internal combustion engine ( 21 ); and
the apparatus ( 2 ) according to claim 1 configured to provide the liquid exhaust gas purification additive to the exhaust gas treatment apparatus ( 22 ).