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:
Aug. 17, 1999
Filed:
Apr. 09, 1998
Paul V Weyna, Manlius, NY (US);
Mark Fragnito, Cicero, NY (US);
John R Reason, Liverpool, NY (US);
L Thomas Lane, Manlius, NY (US);
Carrier Corporation, Syracuse, NY (US);
Abstract
A method for controlling oil viscosity in a refrigeration unit having an oil viscosity effecting parameter with a desired set point. The refrigeration unit includes an oil lubricated compressor having a capacity and a suction pressure, a condenser, refrigerant control valves, and an evaporator connected in series, for circulating a refrigerant for adjusting air temperature of a compartment. The method comprises the steps of measuring the parameter; controlling viscosity level of said oil so as not to interfere with proper operation of the compressor, including the steps of: setting a parameter range inclusive of the desired set point in which parameter is desired to fall, said range having a high point and a low point, wherein with said parameter in said range, viscosity of the oil is substantially at a desired level; cooling the air if based on said step of measuring the parameter is higher than said high point; heating the air if based said step of measuring the temperature is lower than said low point; and maintaining said air temperature if based on said means for sensing the parameter is within said desired range and toward said set point. A related system for oil viscosity control is also disclosed.