Analysis of Maintenance and Overhaul of Cold Storage Evaporators

As one of the four major components of cold storage equipment, the cold storage evaporator may develop various malfunctions as the operation time of the cold storage project increases. These malfunctions can prevent the cold storage from operating efficiently. In such cases, we need to repair and maintain the cold storage evaporator. The following introduces the causes of malfunctions in the cold storage evaporator, as well as effective methods for its inspection, repair, and maintenance.

With the increase in operation time, a large amount of refrigeration lubricating oil may accumulate on the inner wall of the pipes of the low - temperature cold storage evaporator, especially when the cold storage design or installation is unreasonable. Excessive oil accumulation on the inner wall of the cold storage evaporator pipes can cause a significant decline in the heat transfer coefficient of the evaporator, directly affecting the refrigeration effect of the cold storage, increasing the power consumption during cold storage operation, and seriously affecting the service life of the cold storage compressor. After this type of malfunction occurs, not only should the accumulated oil on the inner wall of the pipes be removed in a timely manner, but also a corresponding technical rectification plan should be formulated according to the actual situation of the cold storage project, so as to solve the root cause once and avoid the recurrence of the malfunction.

The second common malfunction of the cold storage evaporator is blockage.

The blockage of the cold storage evaporator generally occurs in two situations. First, during the installation of the cold storage project, due to the negligence of the construction unit and non - compliance with construction regulations, a large amount of impurities may remain inside the cold storage evaporator. The second situation is that impurities generated during the operation of the cold storage equipment may block the bends or joints of the cold storage evaporator. Regardless of the cause, it is necessary to locate the blocked position, clean out the impurities, and then restore the refrigeration system. After conducting pressure - holding, leak - detection, and evacuation treatments, the evaporator can be put into operation.

During operation, the cold storage evaporator may also experience malfunctions such as corrosion, impact leakage, and flange joint leakage.

These need to be scientifically addressed according to the actual situation. Only after passing the inspection can it be put into use.