Compressor arrangement for automatic compressing of ground coffee

A compressor arrangement for automatically compressing ground coffee includes a housing having an inlet opening and an outlet opening with a retention flap which adjusts a bulk density of the ground coffee, conveying and compressing elements arranged in the housing which are driven by a first drive device, and an adjustment device which pre-adjusts the bulk density of the ground coffee. The adjustment device includes a second drive device, a retention flap shaft, a retention flap arranged on the retention flap shaft, a transmission which is operatively connected to each of the second drive device and the retention flap shaft, and an automatic dynamic pressure adjustment apparatus which enlarges or reduce a preset of the opening angle dependent on a higher dynamic pressure or a lower dynamic pressure being exerted on the retention flap. The transmission includes a transmission device which limits an opening angle of the retention flap.