Tank device for storing a gaseous medium
A tank device for storing a gaseous medium, in particular hydrogen, includes a valve device and a tank. The valve device includes a valve housing having a longitudinal axis, in which valve housing an interior is formed. An actuation valve element is movable along the longitudinal axis and is arranged in the interior, which actuation valve element interacts with a valve seat in order to open and close an outlet opening and thus forms an actuation valve. The valve device includes a solenoid. The valve seat is formed downstream on the valve housing and at the outlet opening, and the cylindrical outlet opening leads into a cylindrical passage channel, the diameter D of the passage channel is greater than the diameter d of the outlet opening.
1. A tank device ( 1 ) for storing a gaseous medium, the tank device having a valve device ( 2 ) and having a tank ( 10 ), wherein the valve device ( 2 ) has a valve housing ( 20 ) with a longitudinal axis ( 11 ), in which valve housing ( 20 ) there is formed an interior space ( 7 ), in which interior space ( 7 ) there is arranged an actuation valve element ( 18 ) which is movable along the longitudinal axis ( 11 ), which actuation valve element ( 18 ) interacts with a valve seat ( 40 ) for opening and closing an outlet opening ( 31 ) and thus forms an actuation valve ( 44 ), wherein the valve device ( 2 ) comprises a magnet coil ( 14 ), wherein the valve seat ( 40 ) is formed downstream on the valve housing ( 20 ) and at the outlet opening ( 31 ), and the outlet opening ( 31 ) opens out into a cylindrical passage channel ( 80 ), wherein a diameter D of the passage channel ( 80 ) is greater than a diameter d of the outlet opening ( 31 ), wherein the tank ( 10 ) has a neck region ( 6 ), in which neck region ( 6 ) the valve device ( 2 ) is arranged, the neck region ( 6 ) further including a partition having a bottom surface exposed to a tank interior space ( 100 ) and a top surface abutting the valve housing ( 20 ), wherein a passage opening ( 4 ) is formed in the partition and extends from the top surface to the bottom surface, wherein the interior space ( 7 ) of the valve housing ( 20 ) is configured to be connected to the tank interior space ( 100 ) by an inlet opening ( 28 ) formed in the valve housing ( 20 ), wherein the inlet opening ( 28 ) is in fluid communication with the passage opening ( 4 ).
2. The tank device ( 1 ) as claimed in claim 1 , wherein the passage channel ( 80 ) transitions into the outlet opening ( 31 ) via a conical transition region ( 36 ).
3. The tank device ( 1 ) as claimed in claim 1 , wherein the tank device ( 1 ) has an encasing element ( 12 ), by way of which encasing element ( 12 ) the valve device ( 2 ) is integrated firmly in the neck region ( 6 ) of the tank ( 10 ) and sealed off with respect to surroundings ( 50 ).
4. The tank device ( 1 ) as claimed in claim 1 , wherein, in a cutout ( 45 ) of the actuation valve element ( 18 ), there is arranged a spring ( 26 ) and there is formed a spring space ( 25 ), by way of which spring ( 26 ) the actuation valve element ( 18 ) is loaded by a force in a direction of the valve seat ( 40 ).
5. The tank device ( 1 ) as claimed in claim 4 , wherein the actuation valve element ( 18 ) has a longitudinal opening ( 33 ) and further openings ( 32 ), which longitudinal opening ( 33 ) and which further openings ( 32 ) are connected fluidically to the spring space ( 25 ).
6. The tank device ( 1 ) as claimed in claim 1 , wherein a sealing body ( 19 ) is arranged on the actuation valve element ( 18 ), which sealing body ( 19 ) has a hemispherical tip.
7. The tank device ( 1 ) as claimed in claim 6 , wherein the sealing body ( 19 ) is made of a plastic.
8. The tank device ( 1 ) as claimed in claim 6 , wherein the valve seat ( 40 ) is of conical form, wherein the valve seat ( 40 ) interacts with the hemispherical tip of the sealing body ( 19 ) for opening and closing the outlet opening ( 31 ).
9. A fuel cell arrangement having a tank device ( 1 ) as claimed in claim 1 for storing hydrogen for the operation of a fuel cell.