US 11,832,757 B2
Beverage preparation device with a milk system
Simon Mueller, Muhen (CH)
Assigned to Franke Kaffeemaschinen AG, Aarburg (CH)
Filed by Franke Kaffeemaschinen AG, Aarburg (CH)
Filed on Aug. 26, 2020, as Appl. No. 17/002,905.
Claims priority of application No. 102019123590.1 (DE), filed on Sep. 3, 2019.
Prior Publication US 2021/0059466 A1, Mar. 4, 2021
Int. Cl. A47J 31/44 (2006.01); A47J 31/46 (2006.01)
CPC A47J 31/4485 (2013.01) [A47J 31/461 (2018.08); A47J 31/465 (2013.01); A47J 31/468 (2018.08); A23C 2210/30 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A beverage preparation device, comprising:
a milk system (M) for dispensing at least one of milk or milk froth,
a controller (S) configured to control the beverage preparation device to dispense beverages portion by portion,
the milk system (M) having a conveying line (10), which is connectable to a milk container (12), and a milk pump (3), which is attached to the conveying line (10),
a first flow meter (2) arranged in the conveying line (10), said flow meter for metering the milk volume conveyed by the milk pump (3) being connected in terms of signaling to the controller (S),
a water conveying system (W) for conveying at least one of fresh water or hot water for beverage preparation, and the water conveying system has a second flow meter (16) for determining a volume of water conveyed by the water conveying system,
for carrying out a flushing operation, the water conveying system is connectable to the milk system (M) via at least one first flushing valve (27) such that the first and the second flow meters (2, 16) are connected hydraulically in series, and
the controller (S) is configured to carry out, within the scope of a flushing operation, an adjustment of the first flow meter (2) to measurement values of the second flow meter (16).