The invention concerns an inlet area (80) of a centrifuge snail (30),where the centrifugal screw (30) at least in the inlet area (80) is a screw hub (32) with an open wall structure, in particular with longitudinal rods (58),has an inlet freezer opening (47) of an inlet freezer (46),where the inlet opening (47) leads to the inlet area (80). Opposite the inlet opening (47) is a collision element (70),in particular a collision disc with an acceleration element (75), the acceleration element (75) being so designed that a medium applying to the acceleration element (75) is trained in the direction of, in particular, between the longitudinal rods (58), Free spaces (85) of the open wall structure can be accelerated.
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