supermarket refrigerated showcase » article > display freezer > Display cases What are the maintenance methods (2)
Display cases What are the maintenance methods (2)
display cases What are the maintenance methods (2)
(3) Noise The noise of the big machine comes from different parts and types. The whole machine makes a sound similar to agricultural machinery, 90% of which are display cases. The placement of the display cases is uneven. In some cases, the bottom corners of the display cases are of different heights. Metal collision sounds are heard at the water receiving box. Most of the sound is caused by the unstable fixing of the water receiving box: near the compressor. There is a metal collision sound in the refrigeration pipeline of the mound, which is mostly caused by the collision of two pipelines there: the compressor makes a metal collision sound of dangdang , which is the suspension spring inside the compressor falling off.
(4) The compressor noise of the refrigeration system model under repair or the rework machine becomes very loud during the process of refilling refrigerant, indicating that the display cases have welding blockage in the refrigeration pipeline: the noise becomes louder after the refrigeration system is repaired, and most of it is refrigeration The pipeline is not cleanly evacuated or the filling pipe is not emptied before the refrigerant is filled.
3. Touch
(1) Before and after repairing the refrigeration system, touch the condenser and evaporator temperature and changes. For example, the area of the condenser heat is small (normal model summer 2/3 winter 1/2 heat), evaporator frost is less or less solid or Dissatisfaction is due to the lack of refrigerant in the refrigeration pipeline or the poor exhaust of the compressor: the heat of the condenser is uneven (the heat of the normal model changes uniformly), mostly because there is air in the refrigeration pipeline, and there is little refrigerant in the refrigeration pipeline. .
(2) Touch the temperature of the compressor discharge pipe during refrigerant filling. The moment when the temperature rises from normal temperature to hot, it shows that the refrigerant added is basically suitable.
(3) Refrigeration does not stop display cases. After shutting down and opening the door of the freezer and refrigerator for one day, touch the back of the refrigerator. If there is water or softness inside, it is the display cases. The temperature pipe cannot correctly sense the cooling effect, causing it to fail to stop.
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