The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 04, 2025
Filed:
May. 05, 2023
GM Global Technology Operations Llc, Detroit, MI (US);
Nathan John English, Brighton, MI (US);
Lawrence P. Ziehr, Clarkston, MI (US);
Satish P. Ketkar, Troy, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A vapor injection refrigerant system includes a compressor, a condenser coupled to the compressor, an evaporator coupled to the condenser, and a chiller coupled to the condenser. The compressor includes at least a first stage and a second stage and is configured to output refrigerant in vapor form. The chiller is configured to inject refrigerant in vapor form into the second stage of the compressor. Additionally, the system may include a three-way valve having a first outlet coupled to the second stage of the compressor and a second outlet coupled to an outlet of the evaporator, and a control module configured to control the three-way valve to inject refrigerant in vapor form into the second stage of the compressor at a pressure greater than a pressure of the first stage of the compressor. Other example vapor injection refrigerant systems are also disclosed.