Filling system and filling gun for filling carbon dioxide snow into a transport container

摘要

The present invention is directed to a filling system for filling a cooling cartridge (3) in a transport container (2) via a filling terminal (4) with carbon dioxide snow comprising an external supply line (6) for supplying liquid carbon dioxide, an external exhaust line (7) for conducting gaseous carbon dioxide to the environment (32), a filling gun (1) having an internal supply line (16) and an internal exhaust line (17), to which the external supply line (6) and the external exhaust line (7) are coupled and which form a filling end (11) where the internal supply line (16) is surrounded by the internal exhaust line (17), which filling end (11) can be introduced into the filling terminal (4), at least one electromagnet (18) for holding the filling gun (1) in a filling position (P), a filling valve (13) for opening and closing the internal supply line (16), a pressure sensor (12) downstream of the filling valve (13), at least one activation sensor (14) measuring the distance (d) of the filling gun (1) from the filling position (P), a control center (8) for controlling the opening and closing of the filling valve (13) in dependency of the values measured by the pressure sensor (12) and an electric current flow (I) in the electromagnet (18). A filling gun (1) for the filling system contains all measuring and switching devices to safely and reliably operate the filling system and to fill in a reproducible manner exactly required amounts of carbon dioxide snow (dry ice) into a transport container (2).