Methods for improving the uniformity of espresso coffee concentration in espresso coffee machines, as well as related espresso coffee machines

摘要

The present invention relates to a machine for preparing and discharging espresso coffee, which comprises a coffee boiler, a filter holder having a filter for a coffee powder pack to be pressed, a pre-injection chamber, and a pre-injection chamber from the coffee boiler. Is equipped with a hydraulic circuit for transporting pressurized water. The machine is further equipped with a pre-injection chamber and a device for detecting parameters indicating the filling of the hydraulic circuit, and can start the step of discharging espresso coffee based on the detected filling parameters. [Selection diagram] Fig. 1