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:
Oct. 09, 2001
Filed:
Aug. 31, 2000
Kwok Kwong Fung, Granger, IN (US);
Robert Hong Leung Chiang, Manlius, NY (US);
Eugene Duane Daddis, Jr., Manlius, NY (US);
Carrier Corporation, Syracuse, NY (US);
Abstract
A refrigerated merchandiser system (,) includes a compressor (,), a condenser (,), a display case (,) having an evaporator (,), an expansion device (,), and an evaporator pressure control device (,) connected in a closed refrigerant circuit via refrigerant lines (,and,). The evaporator pressure control device (,) operates to maintain the pressure in the evaporator at a set point pressure so as to maintain the temperature of the refrigerant expanding from a liquid to a vapor within the evaporator (,) at a desired temperature. A controller (,) operatively associated with the evaporator pressure control device (,) maintains the set point pressure at a first pressure for the refrigerant equivalent to a first refrigerant temperature during a first refrigeration mode and at a second pressure for the refrigerant equivalent to a second refrigerant temperature about 2 to about 12 degrees warmer than the first temperature during a second refrigerant mode. The controller (,) sequences operation between said first refrigeration mode and said second refrigeration mode.