Patent ID: 6125642
Filing Date: 2000-10-03
Classification: F04B,F04C,F16N,F25B,G05D

Abstract:
An oil level control device for each compressor of a multiple compressor refrigeration system, said system including an oil supply, each control device being adapted to be attached between an associated compressor sump and the oil supply, each control device comprising:a) a housing, including an inlet communicating with the oil supply and an outlet communicating with an associated compressor sump;b) flow control means controlling flow from the oil supply into said compressor sump;c) a proximity detection system including a sensing chamber and a fixed, insulated metallic probe for detecting the presence of oil in the chamber and generating a signal that controls the supply of oil to said compressor sump to maintain the correct oil level in the sump; andd) control circuit means connected to the probe, said control circuit means having an output operating the flow control means.