Patent ID: 9186017
Filing Date: 2015-11-17
Classification: A23F,A47J

Abstract:
1. A brewing device for producing a coffee beverage, wherein the brewing device comprises: a brewing unit with a brewing chamber for brewing coffee with brewing water which can be introduced under pressure into the brewing chamber; a crema unit for creating crema with a crema chamber connected with the brewing chamber via a coffee passage and a valve piston movable in the crema chamber relative to the coffee passage for opening and/or closing the coffee passage; and an outlet opening for a particular coffee beverage, wherein the crema chamber of the crema unit is connected with the outlet opening by means of an outlet line such that for producing the particular coffee beverage coffee brewed in the brewing unit during a brewing operation is enabled to flow through the coffee passage and the crema chamber and reach the outlet opening, wherein the valve piston is movable such that a movement position of the valve piston is enabled to be altered relative to the coffee passage and the valve piston is configured to be brought into a plurality of different specified movement positions, so that the valve piston in one of the specified movement positions tightly closes the coffee passage and in another of the specified movement positions is at a distance from the coffee passage and does not close the coffee passage, wherein different consecutive brewing operations for producing different coffee beverages can be realized such that the valve piston assumes one of the specified movement positions in one of the brewing operations and another one of the specified movement positions in another one of the brewing operations, and wherein the crema unit is configured such that the coffee brewed during the respective brewing operation is configured to be swirled through the crema chamber at different intensity depending on the respective specified movement position of the valve piston, whereby a final control element which is configured, according to a control signal, to alter the movement position of the valve piston; a pressure sensor for providing a pressure reading for the momentary pressure of the brewing water in the brewing chamber; a control unit which is configured to produce the control signal and supply it to the final control element, wherein the control unit is implemented as a regulator which is configured to receive the pressure reading provided by the pressure sensor and to regulate, during one of the brewing operations, the movement position of the valve piston depending on a pressure setpoint for the pressure of the brewing water in the brewing chamber such that the pressure of the brewing water in the brewing chamber assumes the pressure setpoint.