公开(公告)号：US11359847B2

公开(公告)日：2022-06-14

申请号：US16326895

申请日：2017-08-22

Applicant: Johnson Controls Technology Company

Inventor： William L. Kopko ,  Stephen M. Zardus ,  Israel Federman ,  Curtis C. Crane ,  Todd Kwao-vovo

IPC: F25B49/02 ,  F25B25/00 ,  F25B23/00

Abstract: A refrigeration system includes a heat exchanger configured to place a cooling fluid in a heat exchange relationship with a working fluid, a free-cooling circuit having a pump configured to circulate the working fluid through the heat exchanger and a condenser, a flow control valve configured to control a flow rate of the working fluid to the condenser, a condenser bypass valve configured to control a flow rate of the working fluid that bypasses the condenser, and a controller configured to adjust a position of the flow control valve, a position of the condenser bypass valve, a speed of a fan of the condenser, a speed of the pump, and a temperature of a heater based on an ambient temperature, a temperature of the working fluid leaving the condenser, the position of the flow control valve, the position of the condenser bypass valve, or a combination thereof.

公开(公告)号：US20190186801A1

公开(公告)日：2019-06-20

申请号：US16326895

申请日：2017-08-22

Applicant: Johnson Controls Technology Company

Inventor： William L. Kopko ,  Stephen M. Zardus ,  Israel Federman ,  Curtis C. Crane ,  Todd Kwao-vovo

IPC: F25B49/02 ,  F25B25/00

CPC classification number: F25B49/027 ,  F25B23/006 ,  F25B25/005 ,  F25B2400/0403 ,  F25B2600/111 ,  F25B2600/13 ,  F25B2600/2501 ,  F25B2600/2515 ,  Y02B30/745

Abstract: A refrigeration system includes a heat exchanger configured to place a cooling fluid in a heat exchange relationship with a working fluid, a free-cooling circuit having a pump configured to circulate the working fluid through the heat exchanger and a condenser, a flow control valve configured to control a flow rate of the working fluid to the condenser, a condenser bypass valve configured to control a flow rate of the working fluid that bypasses the condenser, and a controller configured to adjust a position of the flow control valve, a position of the condenser bypass valve, a speed of a fan of the condenser, a speed of the pump, and a temperature of a heater based on an ambient temperature, a temperature of the working fluid leaving the condenser, the position of the flow control valve, the position of the condenser bypass valve, or a combination thereof.