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:
Sep. 15, 1992
Filed:
Jun. 17, 1991
Lowell E Paige, Pennellville, NY (US);
Carrier Corporation, Syracuse, NY (US);
Abstract
A method and apparatus for recovering compressible refrigerant from a refrigeration system and delivering the recovered refrigerant to a refrigerant storage means. The recovery method includes the steps of withdrawing refrigerant from a refrigeration system being serviced and compressing the withdrawn refrigerant in a compressor to form a high pressure gaseous refrigerant. The high pressure gaseous refrigerant is delivered to a condenser where it is condensed to form liquid refrigerant. The liquid refrigerant from the condenser is delivered to the refrigerant storage means. Means are provided for stopping the withdrawal of refrigerant from the refrigeration system being serviced when a predetermined event occurs. When this occurs, the system begins to withdraw stored refrigerant from the storage means. The refrigerant withdrawn from the storage means is then compressed in the same compressor which was used to compress refrigerant withdrawn from the refrigeration system. This refrigerant is then condensed to form liquid refrigerant which is delivered directly back to the storage means to thereby pre-cool the storage means and the refrigerant contained therein. This pre-cooling cycle is performed for a predetermined time period. After the predetermined time period, the condensed refrigerant withdrawn from the storage means is caused to pass through an expansion means prior to delivering it back to the storage means to thereby cool the storage means.