公开(公告)号：US20190063461A1

公开(公告)日：2019-02-28

申请号：US15873560

申请日：2018-01-17

Applicant: TRANE INTERNATIONAL INC.

Inventor： Christopher Espelien ,  Joseph M. Heger ,  Daniel A. Strange ,  Russell T. Abbott ,  Robert S. Bakkestuen

IPC: F04D29/58 ,  F04D29/058

Abstract: A variable orifice flow device controls the flow of refrigerant into a compressor motor housing in a compressor. The variable orifice flow device may include, for example, an electronic expansion valve, a thermal expansion valve, or a shuttling valve controlling the flow of refrigerant into a compressor motor housing. One or more flows of refrigerant may be through a fixed orifice, a valve seat of the variable orifice flow device, or leakage through a seal of the compressor motor housing, providing a baseline refrigerant flow to the inside of the compressor motor housing in addition to the flow through the variable orifice flow device.