Scroll-type compressor and CO2 vehicle air conditioning system having a scroll-type compressor

A scroll-type compressor for a CO2 vehicle air conditioning system, having a drive which is connected to an eccentric bearing by a drive shaft, and having a movable displacement spiral which is rotatably connected to the eccentric bearing and which engages into a counterpart spiral such that, between the movable displacement spiral and the counterpart spiral, radially inwardly traveling chambers are formed in order to compress the refrigerant and discharge it into a pressure chamber, wherein the drive is a mechanical drive or an electric drive with a fixed rotational speed, and the counterpart spiral is alternatingly movable relative to the movable displacement spiral in an axial direction, wherein, between the counterpart spiral and the movable displacement spiral, there is arranged at least one spring for exerting an axial release force on the counterpart spiral, and at least one piston engages on the counterpart spiral, in order to exert an axial closing force on the latter, adjacent to the pressure chamber.