公开(公告)号：AU2008202088B2

公开(公告)日：2010-11-25

申请号：AU2008202088

申请日：2008-05-12

Applicant: EMERSON CLIMATE TECHNOLOGIES RETAIL SOLUTIONS INC

Inventor： MATTHEWS THOMAS J ,  WOODWORTH STEPHEN T ,  SINGH ABTAR

IPC: F25B49/00

公开(公告)号：AU2004236695B8

公开(公告)日：2008-10-09

申请号：AU2004236695

申请日：2004-04-29

Applicant: EMERSON CLIMATE TECHNOLOGIES RETAIL SOLUTIONS INC

Inventor： SINGH ABTAR ,  MATHEWS THOMAS J ,  WOODWORTH STEPHEN T

IPC: F25B49/00

Abstract: A system includes a compressor temperature sensor that generates a compressor discharge temperature signal corresponding to a compressor of a refrigeration system, a compressor pressure sensor that generates a compressor discharge pressure signal corresponding to the compressor, and a controller processing the signals over a predetermined time period. The processing includes calculating a discharge saturation temperature based on the compressor discharge pressure signal, calculating compressor superheat data based on the compressor discharge temperature signal and the discharge saturation temperature, accumulating the compressor superheat data over the predetermined time period, and comparing the accumulated compressor superheat data to a predetermined threshold. The controller generates an alarm indicating a compressor fault based on the comparing.