Screw compressor having a volume ratio being adjusted by end faces extending along from a low-pressure side end wall to discharge edges of a slider

Screw compressor comprising a screw compressor housing having a screw rotor housing, screw rotor bores arranged in the screw rotor housing, screw rotors arranged in the screw rotor bores and mounted in the screw rotor housing for rotation about rotational axes, a drive for the screw rotors, and a slider, which is guided for displacement in a slider receptacle in the screw rotor housing, the slider receptacle comprising a guide trough which extends parallel to the screw rotors between an inlet side end of the screw rotors and an outlet side end of the screw rotors and comprises an insertion space which adjoins the guide trough and extends beyond the inlet side end of the screw rotors into the screw rotor housing and wherein the slider in areas, in adjacent relation to the screw rotors has end faces extending toward discharge edges positioned along the screw rotors, for adjusting a volume ratio of the screw compressor and which the slider, starting from the insertion space of the slider receptacle, extends in a direction towards a high-pressure outlet in the guide trough of the slider receptacle that is open towards the screw rotor bores and which slider is movable between a first position and a second position, wherein the volume ratio of the screw compressor is greater in one of the positions than in the other of the positions, low-pressure pockets being provided on a side of the slider that is opposite the end faces thereof and is located in the guide trough, wherein the low-pressure pockets are maintained at low pressure via an unloading channel that leads to a low-pressure inlet.