Screw compressor

Abstract

A screw compressor includes a screw rotor having a screw groove, a gate rotor having a gate that meshes with the screw groove, and a casing rotatably holding the screw rotor and covering the screw rotor from radially outside. The screw rotor, the gate rotor, and the casing form first and second compression chambers. The first compression chamber compresses a fluid at a first pressure to an intermediate pressure higher than the first pressure. The second compression chamber compresses the fluid at the intermediate pressure to a second pressure higher than the intermediate pressure. The casing has an intermediate chamber that communicates with the second compression chamber. The screw rotor and the casing are provided with a seal that seals the intermediate chamber and the first compression chamber. The first compression chamber is located above a center axis of the screw rotor.

Dependencies are inferred from the claim text.