公开(公告)号：WO2019074764A1

公开(公告)日：2019-04-18

申请号：PCT/US2018/054436

申请日：2018-10-04

Applicant: JOHNSON CONTROLS TECHNOLOGY COMPANY

Inventor： BRADSHAW, David Andrew ,  WELCH, Andrew Michael ,  CRANE, Curtis C. ,  NELSON, Calvin Andrew

IPC: F25B39/04 ,  F25B43/04

CPC classification number: F25B39/04 ,  F25B43/043 ,  F25B2339/047 ,  F25B2700/195 ,  F25B2700/21163

Abstract: A vapor compression system comprising a purge unit fluidly coupled to a condenser of the vapor compression system, wherein the vapor compression system comprises a memory storing instructions and a processor configured to execute the instructions to control operation of the purge unit, wherein the instructions comprise a purge cycle, wherein the instructions of the purge cycle comprise: instructions to activate the purge unit for a first predetermined period of time (286); instructions to determine whether one or more evacuations occur during the first predetermined period of time (288); instructions to restart the purge cycle when one or more evacuations occur during the first predetermined period of time (290); and instructions to deactivate the purge unit for a second predetermined period of time when the processor determines that no evacuations occur during the first predetermined period of time (292).