Diagnostics And Control For Micro Booster Supermarket Refrigeration System

摘要

A refrigeration system includes first and second compressors, a condenser, first and second refrigeration cases, and a system controller. The first and second compressors are fluidly connected to respective first and second suction and discharge lines. The second suction line is fluidly connected to the first discharge line. The condenser receives refrigerant from the second compressor. The first and second refrigeration cases operate within respective first and second temperature ranges, the first range being lower than the second range. The first case includes a first evaporator that receives refrigerant from the condenser and discharges refrigerant to the first suction line. The second case includes a second evaporator that receives refrigerant from the condenser and discharges refrigerant to the second suction line. The system controller identifies when maintenance is necessary based on a first discharge temperature of the refrigerant in the first discharge line.