Cold Storage Refrigeration Compressor Defrosting Coordination Control | Avoid Overload During Defrost Cycle
Poor coordination between defrost and compressor causes 28% of cold storage compressor overload trips, xiteliduo Refrigeration Compressors introduces defrost linkage control parameters. Piston refrigeration compressor should reduce capacity or stop running during electric defrost. The compressor cannot restart until defrost ends and coil temperature drops below 8℃. Semi-hermetic refrigeration compressor with hot gas defrost needs discharge pressure stabilization. Discharge pressure peak shall not exceed 2.4 MPa during defrost switching. Cold storage refrigeration compressor suction pressure will rise rapidly at defrost startup. Suction pressure upper limit protection should be set at 0.65 MPa. Defrost interval is determined by frost accumulation rate. For high humidity cold storage, defrost cycle is normally 6~8 hours. 10 recommended hot search keywords: cold storage refrigeration compressor, piston refrigeration compressor, semi-hermetic refrigeration compressor, refrigeration compressor defrost coordination, refrigeration hot gas defrost, refrigeration compressor overload trip, refrigeration suction pressure, refrigeration compressor manufacturer, cold storage defrost control, refrigeration compressor supplier
FAQ
Q1: What percentage of compressor overload trips are caused by improper defrost linkage? A: 28% of overload shutdowns are triggered by bad defrost-compressor coordination. Q2: What coil temperature threshold allows compressor restart after defrost? A: Compressor can start only after coil temperature falls below 8℃. Q3: What is the maximum allowable discharge pressure peak during hot gas defrost? A: Discharge pressure peak cannot exceed 2.4 MPa. Q4: What upper limit should be set for suction pressure protection during defrost? A: Suction pressure high protection setpoint: 0.65 MPa. Q5: What is the typical defrost interval for high humidity cold storage? A: Defrost cycle is 6~8 hours. Q6: Why suction pressure rises sharply at the beginning of defrost? A: Frost melting releases large heat, increasing refrigerant evaporation load instantly. Q7: What are the two mainstream defrost types for cold storage evaporator? A: Electric heating defrost and hot gas defrost.
