Yes, it's a recirculation pump. See here:
Just go to Google Patents and search for: inassignee:"Miele & Cie. KG" and washing machine (or dryer or whatever) and have the results sorted by filing date (under search tools). There's also information on the dosing devices and more.
EP2559803A1 - Washing machine with a tub and a circulation pump - Google Patents
The washing machine comprises a machine housing which is arranged with a tub (3) in which a drum (4) is rotatably mounted, a flood pump (5), a drain pump (6), and the removable filter elements (7.1,7.2) for separation of foreign substances from the washing liquids. Both the pumps comprises...
www.google.de
Just go to Google Patents and search for: inassignee:"Miele & Cie. KG" and washing machine (or dryer or whatever) and have the results sorted by filing date (under search tools). There's also information on the dosing devices and more.