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Commercial refrigeration compressor disassembly, diagnosis and maintenance (5)
commercial refrigeration compressor disassembly, diagnosis and maintenance (5)
compressor vibration decoupling diagnosis, vibration decoupling is only seen in reciprocating compressors, mostly caused by It is caused by the compressor upside down or the tilt angle is too large. The performance in commercial refrigeration is that the refrigeration is normal, but the compressor is running with a very loud Dangdang metal crash.
(6) Compressor noise diagnosis. The abnormal noise generated after the compressor starts and runs normally is generally as follows:
①Strong metal impact noise;
②Sharp rattle n5
n6compressor noise;
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n6 If it is not tightly fixed, it will also produce noise (the noise will drop to the normal range when the compressor is touched by hand).
Simple compressor fault repair. For the compressor just after the warranty period or due to other circumstances, you can try to repair the following faults.
(l) The compressor hoisting spring is off. Remove the compressor, open the cover, and re-hang the damping spring hook. The repair rate is close to 100%, and if used correctly after repair, it will generally not fall off again.
(2) Compressor jams for reciprocating compressors are mostly due to pump jams, excessive wear on the connecting rods of the pistons, excessive rotor gaps or poor lubrication of mechanical parts; rotary compressors jam or hold shafts, generally due to Crankshaft matching clearance is too small, too little lubricating oil, precipitation, poor oil quality, poor oil absorption and excessive temperature rise. commercial refrigeration compressor jam repair methods include vibration method, capacitor activation method, capacitor voltage activation method, reversal method, open shell repair and other methods. The first four methods are simple and easy to implement, and the open-shell method is the most complicated, so you should use it only when you have to.
[Note] Before repairing the compressor cylinder, it is best to remove the compressor, seal the ports, rotate the compressor up and down, so that the lubricating oil can enter all parts of the compressor, increase the lubricity between components, and facilitate the cylinder jam The repair of the fault. The capacitor activation method, the capacitor voltage activation method and the reversal method should not exceed 5 seconds each time, otherwise the compressor may be burned out.
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LAST:It will cause the compressor valve to be deformed or misplaced and damage the compressor. Therefore, it is only used when there is no way. In case of poor cooling effect or non-stop failure, use other methods to check that the compressor has no obvious abNEXT:Commercial refrigeration stop function of refrigeration device
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