对于采用氨泵供液的制冷系统,氨泵能否正常运转送液关系到整个制冷系统能否正常运行。造成氨泵运转不上液的原因,除了机械故障外,一般主要由于低压循环桶内液位过低,使泵的吸入净压头不够,使泵体造成气蚀所致。但对于因油堵而造成氨泵不上液的现象也应引起重视。笔者曾发现和处理过这 For the use of ammonia pump for the refrigeration system, ammonia pump whether the normal operation of liquid delivery related to the entire refrigeration system can operate normally. Ammonia pump operation is not caused by liquid on the reasons, in addition to mechanical failure, the general mainly due to the low pressure circulating drum level is too low, so that the net suction head of the pump is not enough, so that pump body caused by cavitation. However, due to oil blockage caused by the ammonia pump should not be on the phenomenon of liquid should also be taken seriously. I have found and dealt with this