초록 ▼

This oil level control device is for a refrigeration system, the control device being attached between the compressor and the oil supply. The control device includes a housing having an inlet communicating with the oil supply and an outlet communicating with a compressor sump; and a solenoid valve c

This oil level control device is for a refrigeration system, the control device being attached between the compressor and the oil supply. The control device includes a housing having an inlet communicating with the oil supply and an outlet communicating with a compressor sump; and a solenoid valve controlling flow from the oil supply into the compressor sump. A sensing chamber having a fixed probe providing a proximity detection system detects the oil level in the sump and responds to a change in the complex permittivity of the oil as the oil level rises and falls to generate a signal that controls the supply of oil to maintain the oil level in the compressor. Circuitry is provided having an input connected to the output of the sensor and an output connected to the solenoid valve.

대표청구항 ▼

[ We claim as our invention:] [1.] 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 compri

[ We claim as our invention:] [1.] 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.