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    • 9. 发明公开
    • PROFESSIONAL ESPRESSO COFFEE MACHINE
    • EP4321066A1
    • 2024-02-14
    • EP23216661.1
    • 2022-03-25
    • EVOCA S.p.A.
    • LIBERALI, MarcoINFANTI, DiegoARRIGONI, Andrea
    • A47J31/36A47J31/40A47J31/52A47J31/00
    • The beverage preparation machine ( 1 ) comprising:
      - at least a brewing assembly ( 2 ) to produce a beverage by brewing a brewing substance with a brewing liquid;
      - a brewing liquid supply circuit ( 3 ) to supply a brewing liquid to the brewing assembly ( 2 ); and
      - an electronic control unit ( 5 ) to control operation of the beverage preparation machine ( 1 ).
      The brewing assembly ( 2 ) comprises:
      - a brewing liquid dispenser ( 6 ) to dispense a brewing liquid; and
      - a filter holder ( 7 ) with one or more beverage dispensing nozzles ( 8 ), internally defining a brewing chamber fillable with a brewing substance to be brewed with the brewing liquid to prepare the beverage, and manually coupleable to the brewing liquid dispenser ( 6 ) to receive the brewing liquid therefrom.
      The brewing liquid supply circuit ( 3 ) comprises:
      - a brewing liquid flow rate regulation system ( 11 ) to regulate a flow rate of a brewing liquid supplied to the brewing assembly ( 2 ); and
      - a brewing liquid flow meter ( 13 ) to measure, and output an electrical output indicative of, a quantity indicative of an amount of brewing liquid supplied to the brewing assembly ( 2 ).
      The electronic control unit ( 5 ) is designed to:
      - communicate with the brewing liquid flow meter ( 13 ) to receive the electrical output thereof, and with the brewing liquid flow rate regulation system ( 11 ) to provide an electrical command thereto;
      - store functional data required to control the brewing liquid flow rate regulation system ( 11 ) during a beverage preparation cycle and such as to allow the existence of one or different predefined characteristics of the brewing liquid flow rate supplied to the brewing assembly ( 2 ) during a beverage preparation cycle to be determined; and
      - control the brewing liquid flow rate regulation system ( 11 ) during a beverage preparation cycle based on the stored functional data and on the electric output of the brewing liquid flow meter ( 13 ) so as to carry out a step of pre-brewing the brewing substance in the brewing chamber with the brewing liquid, followed by a step of pressurising the brewing chamber and a subsequent step of brewing the brewing substance in the brewing chamber with the brewing liquid.
      The electronic control unit ( 5 ) is further designed to carry out the step of brewing the brewing substance in the brewing chamber with the brewing liquid by implementing a controlled brewing liquid flow rate brewing mode comprising:
      - controlling the brewing liquid flow rate regulation system ( 11 ) to oppose a natural tendency of the brewing liquid flow rate supplied to the brewing assembly ( 2 ) to increase;
      - determining, based on the electric output of the brewing liquid flow meter ( 13 ), whether the brewing liquid flow rate supplied to the brewing assembly ( 2 ) assumes one or different first predefined characteristics indicative of the brewing liquid flow rate supplied to the brewing assembly ( 2 ) having been substantially steadied;
      - when it is determined that the flow rate of the brewing liquid supplied to the brewing assembly ( 2 ) assumes the one or more first predefined characteristics, closed-loop controlling the brewing liquid flow rate regulation system ( 11 ) based on the electric output of the brewing liquid flow meter ( 13 ) so as to keep the steadied brewing liquid flow rate supplied to the brewing assembly ( 2 ).