Abrégé

The invention relates to a spindle compressors without operating fluid in the working chamber, comprising a 2-tooth spindle rotor (2) and a 3-tooth spindle rotor (3) in a surrounding compressor housing (8) and having preferably non-parallel axes of rotation of the two spindle rotors, in particular for use in compression refrigeration machines. According to the invention, in order to improve the efficiency while providing flexible power adaptation, a multi-stage spindle compressor (1) whose compressor housing (8) and whose spindle rotors (2 and 3) are cooled by means of a partial-flow branch-off (25) of liquid refrigerant (39) from the main refrigerant circuit (24) is used as a refrigerant compressor, wherein the compressor housing (8) is cooled in a controlled manner by means of refrigerant evaporation (9), the refrigerant vapor subsequently being fed to the inlet (10), and, for power adaptation, there are, in addition to the inlet feed (11), also post-inlet feeds (12) into the working space and there are, in addition to the outlet discharge (14) from the outlet chamber (13), also pre-outlet discharges (15), each having a separate control element.

Classes IPC  ?

• F04C 29/04 - ChauffageRefroidissementIsolation thermique
• F04C 18/56 - Pompes à piston rotatif à axes de déplacement des organes coopérants non parallèles les axes étant disposés autrement qua selon un angle de 90 degrés du type à engrènement, c.-à-d. avec l'engrènement des organes coopérants semblable à celui de l'engrenage denté