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:
Mar. 16, 2004
Filed:
Jan. 09, 2003
Prasad Shripad Kadle, East Amherst, NY (US);
Jing Zheng, East Amherst, NY (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
An air conditioning system with alternate refrigerant includes isolates an evaporator ( ) from the rest of the system not with a conventional, high pressure resisting shut off valve, but by establishing a pair of independent refrigerant loops from the standard single loop when the system shuts down. A valve housing ( ) has three ports on one side, an upper port ( ) connected to the condenser outlet ( ), a central port ( ) connected to the compressor inlet ( ), and a lower port ( ) connected to the evaporator outlet ( ). On the other side, a single port ( ) is connected to the evaporator inlet ( ). Inside the valve housing, a movable valve member ( ) shifts position between a normal, operating position that interconnects the heat exchangers ( ), through the ports in a single loop, and a system off position which, through a different arrangement of the ports, creates a separate, isolation loop for just the evaporator ( ).