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. 20, 1984
Filed:
Feb. 26, 1982
Fayez F Ibrahim, Niles, MI (US);
Tyler Refrigeration Corporation, Niles, MI (US);
Abstract
A closed circuit refrigeration system includes a compressor, a remote condenser connected to the output of the compressor, and one or more evaporators coupled within the system. A hot gas defrost system is included to rapidly obtain a high operating defrost gas pressure upon the initiation of a defrost cycle and to thereafter maintain an adequate pressure for hot gas defrosting of the evaporators. The hot gas defrost system includes a differential pressure regulated valve which closes the compressor discharge line to shunt the hot gas discharge directly into a hot gas defrost manifold. The differential valve is controlled by a defrost control means. The refrigeration system can also include a receiver tank and a by-pass conduit for shunting refrigerant liquid through the by-pass conduit rather than through the receiver tank depending upon operating conditions. A method of operating a closed circuit refrigeration system with the above features is set forth.