公开(公告)号：US20200208638A1

公开(公告)日：2020-07-02

申请号：US16232717

申请日：2018-12-26

Applicant: TRANE INTERNATIONAL INC.

Inventor： Keith Adam Novak ,  Alberto Scala ,  Timothy S. Hagen ,  Brian Hemmersbach

IPC: F04C29/02 ,  F04C18/16 ,  F25B31/00

Abstract: A screw compressor, refrigerant circuit, lubrication method are disclosed. The screw compressor includes a suction inlet that receives a working fluid to be compressed. A compression mechanism is fluidly connected to the suction inlet. A discharge outlet is fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism. The screw compressor includes a slide valve that is movable between a first position and a second position. The first position corresponds to a high volume ratio and the second position corresponds to a low volume ratio. The slide valve includes a plurality of lubricant passageways selectively connectable to a lubricant source. A first of the plurality of lubricant passageways is configured to be selected to provide lubricant at the high volume ratio, and a second of the plurality of lubricant passageways is configured to be selected to provide lubricant at the low volume ratio.