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:
Jun. 01, 1999
Filed:
Dec. 23, 1997
Joseph H Lee, Fayetteville, NY (US);
Martin O Johnsen, Syracuse, NY (US);
Carrier Corporation, Syracuse, NY (US);
Abstract
A compressor discharge pressure control system employed on a container refrigeration unit utilizes a pressure transducer located in the high pressure side of the system and a data processor to control and limit the compressor discharge pressure to a maximum value when the normal condenser pressure controls are inactive. The pressure control system operates the suction modulation valve in a manner that significantly reduces compressor cycling and increases refrigeration system capacity during pull-down periods. The pressure control system also operates during water-cooled operation of a refrigeration system having a water-cooled condenser thereby eliminating the need to provide a water pressure switch in the refrigeration system.