Analysis of 10 major failure phenomena commonly seen in refrigeration equipment maintenance
1. The exhaust gas temperature of the refrigeration system is too low: The low exhaust pressure is mainly caused by the small or even stop flow of the refrigerant in the refrigeration system. The exhaust pressure is too low, although the phenomenon is manifested at the high pressure end, but the cause is mostly caused by the low pressure end. Common reasons for low exhaust pressure: 1) The expansion valve hole is blocked, the liquid supply volume is reduced or even stopped, and the suction and exhaust pressures are reduced at this time. 2) The expansion valve ice block or dirty blockage and filter blockage, etc., will inevitably reduce the suction and exhaust pressure. 2. Refrigeration system back to liquid: 1) For a small refrigeration system using a capillary: the liquid addition is too large to cause liquid return. When the evaporator is severely frosted or the fan fails, the heat transfer deteriorates, and the unvaporized liquid causes the liquid to return. Fre