Invention Grant
- Patent Title: Expansion device control system for heating, ventilation, and air conditioning (HVAC) unit
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Application No.: US16768830Application Date: 2018-12-04
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Publication No.: US11340002B2Publication Date: 2022-05-24
- Inventor: Gail Elaine Lindberg , Curtis Christian Crane , Carlos Jose Uribe
- Applicant: Johnson Controls Technology Company
- Applicant Address: US MI Auburn Hills
- Assignee: Johnson Controls Technology Company
- Current Assignee: Johnson Controls Technology Company
- Current Assignee Address: US MI Auburn Hills
- Agency: Fletcher Yoder, P.C.
- International Application: PCT/US2018/063878 WO 20181204
- International Announcement: WO2019/113094 WO 20190613
- Main IPC: F25B49/02
- IPC: F25B49/02 ; F25B41/31 ; F25B41/34

Abstract:
A heating, ventilating, and air conditioning (HVAC) system that includes a vapor compression system having a refrigerant, a compressor of the vapor compression system configured to circulate the refrigerant through the vapor compression system, an expansion device of the vapor compression system configured to adjust a flow of the refrigerant through the vapor compression system, and a controller configured to adjust a position of the expansion device based on a measured amount of superheat of the refrigerant entering the compressor, a measured discharge temperature of the refrigerant leaving the compressor, or a combination thereof, such that the measured amount of superheat of the refrigerant entering the compressor reaches a target amount of superheat, the measured discharge temperature of the refrigerant leaving the compressor reaches a target discharge temperature, or a combination thereof.
Public/Granted literature
- US20210010732A1 CONTROL SYSTEM FOR HVAC UNIT Public/Granted day:2021-01-14
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