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:
May. 23, 1995
Filed:
Mar. 07, 1994
Kenneth W Manz, Paulding, OH (US);
SPX Corporation, Muskegon, MI (US);
Abstract
Apparatus for purification of refrigerant that includes a replaceable filter/dryer unit for removing water from refrigerant passing therethrough and having a predetermined water absorption capacity, and a compressor for pumping refrigerant through the filter/dryer unit. Refrigerant vapor pressure is measured at the compressor inlet, and mass flow rate of water in the refrigerant pumped through the filter/dryer unit is determined as a function of measured pressure. The mass flow rate of water so determined is monitored over time of operation of the refrigerant pump to determine when the mass of water in refrigerant pumped through the filter/dryer unit reaches the predetermined water absorption capacity of the unit. Filter status may be indicated to an operator and/or operation of the pump may be terminated.