Cause analysis of compressor burnout in refrigeration and air conditioning system
Most of the voltage is too low to start, resulting in frequent overload protection of air conditioning compressor. Once the overload protector is damaged, the compressor is burnt out!
1 big current, 2 overload, 3 overload, 4 outer machine little space, the air is not smooth
Most of the burn is because of high temperature, high temperature, usually starting frequently, voltage is too low, refrigerant shortage, internal mechanical failure and thermal protection failure caused by the reasons
First, it must be a system problem, because once the system has entered the impurities, it is easy to cause the cylinder to be stuck. System problems, generally as long as the maintenance, pay special attention to, do not drop the slag into the line, of course, there may be the quality of the system's internal frozen oil is too bad, but also possible.The second is the system of internal oil GAD may appear excessive, compressor damage. Conversely, if the refrigerant oil is too small, there may be damage to the compressor. Therefore, the frozen oil can not be much, nor less, just just right.Third is the air conditioning itself, such as the condenser cooling is not good, the internal pressure at the system is too large, the current increases, temperature rise, long time work, cause the compressor exhaust valve, suction gas mixing, resulting in the damage of the compressor.The fourth problem is to install, such as installed in the narrow position, caused by the heat is not good; or is installed above position, the machine outside the machine, more than 5 meters, and then into the freezer oil evaporation gas can not return to the compressor, a long time, cause the compressor oil cylinder may also make a card; is between the indoor and outdoor machine connecting pipe is bent, the refrigerant in the system pressure is too large, resulting in overheating of the compressor, thereby damaging the compressor.
There are several ways to damage the compressor:1 compressor coil winding burnout. The compressor can not be started and has the characteristics of protection or fire protection.2. compressor leakage. The machine can not start, the power trip, the compressor winding to the ground short circuit or insulation decline.3. compressor mechanical parts stuck (card cylinder). The compressor can not start, the protector moves frequently, and the winding resistance is normal.4. compressor normal start, no suction exhaust pressure or insufficient. The efficiency decreases, the system pressure is high, and the current value is lower than the rated value.5. compressor values are normal, but frequent protection. The overall performance is decreased, the winding current is unstable, and the load carrying capacity is insufficient.The air conditioning compressor when working on the refrigerant for its cooling, if no refrigerant in the refrigeration system, the short term will not cause the compressor work problems, that is not the coil winding compressor fault burned, but long-term work will cause the compressor internal mechanical operation of the site (including valve wear, suction and exhaust pressure is reduced, because of freezing oil due to high temperature lubricating ability, mechanical operation of the site because of overheating and death card can work and so on). Don't worry because the compressor protection device, protection device is a kind of passive measures, if the compressor has protected proof system or machine problems, whether over-current protection or overheat protection of compressor is detrimental.
