Patent ID: 6539734
Filing Date: 2003-04-01
Classification: F04B,F25B,F25D

Abstract:
A method for detecting a flooded compressor startup condition in a mobile refrigeration unit, comprising the steps of:(a) determining whether said compressor is running, and if so, starting a timer; (b) determining, after said timer is started, whether a discharge superheat of said unit is less than a first predetermined temperature, and if so, determining whether a suction superheat of said unit is less than a second predetermined temperature, and if so, determining whether a suction pressure of said unit exceeds a predetermined pressure, and if so, determining whether said timer exceeds a first predetermined period of time; (c) determining, after step (b) is completed and after said timer exceeds said first predetermined time, whether said suction superheat is less than said second predetermined temperature, and if so, determining whether said discharge superheat is less than said first predetermined temperature, and if so, determining whether said timer exceeds a second predetermined period of time; and (d) stopping, after step (c) is completed and after said timer exceeds said second predetermined period of time, said compressor.