Causes and malfunctions of ice blockage in cold storage equipment?

Causes and malfunctions of ice blockage in cold storage equipment?

How to solve the clogging failure of the refrigeration system is a problem that many people with this problem are very concerned about. The clogging of the refrigeration system is mainly caused by ice blockage, dirty blockage or oil blockage of the capillary tube, or dirty filter of the dry filter. After the refrigeration system is blocked, the refrigerant can not be circulated, so that the compressor does not stop for a long time, the tank is not cooled or the cooling is slow, and the condenser is not hot. The details of the solution about the blockage of the refrigeration system are introduced below.

Causes and malfunctions of ice jam

The ice plugging fault occurs mainly because the refrigeration system contains excessive moisture. As the refrigerant continues to circulate, the water in the refrigeration system gradually concentrates at the capillary outlet. Due to the low temperature at the capillary outlet, the water becomes ice and gradually When it is increased, the capillary is completely blocked to a certain extent, the refrigerant cannot be circulated, and the refrigerator is not cooled. Causes and malfunctions of ice blockage in cold storage equipment?

The main source of moisture in the refrigeration system is that the motor insulation paper in the compressor contains moisture, which is the main source of moisture in the system. In addition, the residual parts of the refrigeration system components and connecting pipes are insufficient due to insufficient drying; the refrigerating machine oil and refrigerant contain more than the allowable amount of water; during the assembly or maintenance process, the pipeline is in development for a long time, causing moisture in the air to be Absorbed by motor insulation paper and refrigeration oil. Due to the above reasons, the water content of the refrigeration system exceeds the allowable amount of the refrigeration system, and ice blockage occurs. On the one hand, the ice block can cause the refrigerant to not circulate, and the refrigerator can not normally cool; on the other hand, the water will chemically react with the refrigerant to form hydrochloric acid and hydrogen fluoride, causing corrosion of the metal pipes and components, and even causing motor windings. Insulation damage, but also cause deterioration of the refrigeration oil, affecting the lubrication of the compressor. Therefore, the moisture in the system must be kept to a limit. Causes and malfunctions of ice blockage in cold storage equipment?

The performance of the ice block in the refrigeration system is normal in the initial stage, frosting in the evaporator, heat dissipation in the condenser, stable operation of the unit, and clear and stable refrigerant activity in the evaporator. With the formation of ice blockage, the audible airflow becomes weaker and intermittent, and when the blockage is severe, the airflow sound disappears, the refrigerant cycle is interrupted, and the condenser gradually cools. Due to the clogging, the exhaust pressure is increased, the machine operation sound is increased, no refrigerant flows into the evaporator, the frosting area is gradually reduced, the temperature is gradually increased, and the capillary temperature is also raised together, so that the ice cube begins to melt, and this The refrigerant begins to recirculate again. After a period of time, the ice block occurs again, forming a periodic phenomenon of plugging.