公开(公告)号：US20170350398A1

公开(公告)日：2017-12-07

申请号：US15611137

申请日：2017-06-01

Applicant: TRANE INTERNATIONAL INC.

Inventor： Scott M. BRANCH ,  Timothy S. HAGEN ,  Jerry A. Rood ,  Alberto SCALA

IPC: F04C29/12 ,  F25B1/047 ,  F04C18/16 ,  F25B49/02 ,  F04C27/00

CPC classification number: F04C29/12 ,  F04C18/16 ,  F04C27/00 ,  F04C28/10 ,  F25B1/047 ,  F25B49/022 ,  F25B2600/0262 ,  F25B2600/027

Abstract: A screw compressor includes a compressor housing defining a working chamber, the housing including a plurality of bores; a first rotor having helical threads, the first rotor being housed in a first of the plurality of bores; a second rotor having helical threads intermeshing with the helical threads of the first rotor, the second rotor being housed in a second of the plurality of bores; an inlet port that receives a fluid to be compressed; an outlet port that receives a compressed fluid; and an intermediate discharge port disposed between the compression chamber and the outlet port, the intermediate discharge port including a sealing member and a biasing mechanism, fluid flow being prevented between the compression chamber and the intermediate discharge port when in a flow-blocked state, and fluid flow being enabled from the compression chamber through the intermediate discharge port when in a flow-permitted state.

公开(公告)号：US20180356139A1

公开(公告)日：2018-12-13

申请号：US15620516

申请日：2017-06-12

Applicant: TRANE INTERNATIONAL INC.

Inventor： Jay H. JOHNSON ,  Alberto SCALA

IPC: F25B49/02 ,  F25B1/00 ,  F04C18/16 ,  F04C28/08 ,  F04C28/24 ,  F04C28/28

Abstract: Control systems and methods for increasing efficiency of a compressor while the compressor capacity exceeds compressor load, by using a mechanical unloader such as a slide valve to reduce the internal volume ratio of the compressor and allow a more efficient speed to be maintained by a variable frequency drive (VFD) while reducing the compressor capacity based on the load. Control systems include the VFD, a controller for the VFD and the mechanical unloader, and temperature sensors. Compressor embodiments further include one or more compressors and mechanical unloaders operated by the control systems.

公开(公告)号：US20190383539A1

公开(公告)日：2019-12-19

申请号：US16008883

申请日：2018-06-14

Applicant: TRANE INTERNATIONAL INC.

Inventor： Kevin P. HUGHES ,  Robert S. BAKKESTUEN ,  Timothy S. HAGEN ,  Keith Adam NOVAK ,  Daniel R. DREHER ,  Alberto SCALA

IPC: F25B49/02 ,  F25B43/02 ,  F25B31/00 ,  F25B1/047

Abstract: A heating, ventilation, air conditioning, and refrigeration (HVACR) system is disclosed. The HVACR system includes a refrigerant circuit. The refrigerant circuit includes a compressor, a condenser, an expansion device, and an evaporator fluidly connected. A controller is electronically connected to the compressor. The controller is configured to prevent the compressor from operating at a speed that is less than a minimum speed limit. A lubricant separator has an inlet fluidly connected between the compressor and the condenser and a plurality of outlets. A first of the plurality of outlets is fluidly connected to the condenser. A second of the plurality of outlets is fluidly connected to one or more components of the compressor to provide a lubricant to the one or more components.