walk-in cooler evaporator diagnosis and repair (2)

evaporator repair Only the evaporator and exposed evaporator that have been cut due to improper defrosting by the user can be repaired, others The situation cannot be repaired.

(1) Repairing the evaporator by sticking method. This method is suitable for inflatable and plate-tube evaporators. Sticky repair cut the evaporator due to improper defrosting. First, use a saw blade to polish the cut area and 0.5 cm around it to reveal the original metallic color. The purpose of using a saw blade to polish is to make the polished part rough and easy to fix firmly; secondly, take the AB double tube glue, according to the ratio of 1:1 Take an appropriate amount, adjust it evenly and apply it to the leak; about 30 minutes, stick it again after the glue has solidified; press it after 24 hours to check the sticking effect. If the damaged area of ​​the inflatable evaporator is large, the adhesion method above may not be fully adhered or firmly adhered. At this time, the vacuum method can be used to repair, that is, the vacuum pump is connected through the compressor process nozzle, and the walk-in cooler refrigeration pipe is evacuated to reduce the pressure in the refrigeration pipe. Cui will form suction at the cut part, and the glue will be slightly covered. When inhaling some, immediately turn off the vacuum pump to prevent too much glue from entering the pipe and forming a blockage. The evaporator should be smashed away from the back. This method is only suitable for models with the same type of back plate.

(2) Repair welding method to repair exposed evaporator is suitable for drawer type evaporator. Press 0.8MPa on the evaporator, find out the location of the leak with soapy water, polish it with sandpaper, and repair the leak with gas welding.

(3) The evaporator repaired by the modified pipeline method. Because of the walk-in cooler evaporator leaks, all leaks occur at the interface of the refrigerated evaporator return pipe. The reason is that the steel and copper materials are welded here, so they have been used for a long time. Oxidation corrodes and leaks air. During maintenance, remove this section of the return air pipe and replace it with a copper pipe.

The above articles are from refrigerated showcase walk-in cooler and walk-in cooler prices. For details, please visit: www.ihdjx.com

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