公开(公告)号：WO2021127471A1

公开(公告)日：2021-06-24

申请号：PCT/US2020/066060

申请日：2020-12-18

Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY

Inventor： SNELL, Paul William ,  HEISEY, Matthew Lee ,  WOLGEMUTH, Tyler Alexander

IPC: H02K9/20 ,  H02K9/12 ,  H02K5/20 ,  H02K1/20 ,  F25B1/00 ,  F25B31/006 ,  H02K9/04

Abstract: A hybrid cooling system for a hermetic motor includes an annular cavity in a motor housing that receives a vapor flow and an annulus in the motor housing that receives a liquid flow. The hybrid cooling system includes a sleeve disposed adjacent to the annular cavity and the annulus, where a radial opening is defined through the sleeve. The hybrid cooling system includes a stator at least partially surrounded by the sleeve, a gap defined between the stator and a rotor, and a vent slot of the stator configured to receive the vapor flow from the annular cavity through the radial opening of the sleeve and direct the vapor flow to the gap. The hybrid cooling system includes an exit path in the motor housing configured to direct an evaporated vapor flow, generated from the liquid flow contacting the stator, and the vapor flow out of the motor housing.

公开(公告)号：WO2019133725A1

公开(公告)日：2019-07-04

申请号：PCT/US2018/067710

申请日：2018-12-27

Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY ,  HEISEY, Matthew Lee ,  SNELL, Paul William

Inventor： HEISEY, Matthew Lee ,  SNELL, Paul William

IPC: F04D25/06 ,  F04D29/051

Abstract: A compressor (32) includes a shaft (101), a motor (50) configured to drive the shaft (101) into rotation, and a thrust bearing (100) configured to permit rotation of the shaft (101) and support an axial load of the shaft (101). The thrust bearing (100) is positioned about the shaft (101) and between the motor (50) and an impeller (102) of the compressor (32).

公开(公告)号：WO2021067637A1

公开(公告)日：2021-04-08

申请号：PCT/US2020/053862

申请日：2020-10-01

Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY

Inventor： SNELL, Paul William ,  HEISEY, Matthew Lee

IPC: F04D17/10 ,  F04D25/06 ,  F04D27/02 ,  F04D29/46 ,  F25B1/053 ,  F04D29/44 ,  F25B49/02

Abstract: A heating, ventilation, and/or air conditioning (HVAC) system (10) includes a compressor (32) having an impeller (200) configured to rotate and drive a working fluid through a working fluid circuit (152) of the HVAC system (10) in an active operating mode. The HVAC system (10) further includes a controller (154) configured to, in response to receiving an input indicative of a transition to operate in an inactive operating mode, suspend the active operating mode by interrupting a supply of power to the compressor (32), adjust pre-rotation vanes (160) of the compressor (32), a variable geometry diffuser (162) of the compressor (32) to a first position, or both to enable a backflow (213) of the working fluid through the compressor (32) for a first interval of time, and, after the first interval of time has elapsed, adjust the pre-rotation vanes, the variable geometry diffuser (162), or both to a second position to block the backflow (213) of the working fluid through the compressor (32).

公开(公告)号：WO2020198597A1

公开(公告)日：2020-10-01

申请号：PCT/US2020/025240

申请日：2020-03-27

Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY

Inventor： JADRIC, Ivan ,  KANE, Ajit Wasant ,  SCHREIBER, Jeb William ,  HEISEY, Matthew Lee ,  KOHLER, Jay Albert

IPC: F25B1/04 ,  F25B31/00 ,  F25B41/00 ,  F04B39/06 ,  F25B25/00 ,  F25B49/02

Abstract: A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system includes a refrigerant loop having a compressor configured to circulate a refrigerant therethrough, a motor configured to drive rotation of the compressor, wherein the motor is a permanent magnet assisted synchronous reluctance (PMASR) motor, and a motor cooling system configured to direct a portion of the refrigerant from the refrigerant loop and through a housing of the PMASR motor to place the portion of the refrigerant in thermal communication with components of the PMASR motor.