What to do if there is a refrigerant leak in an industrial chiller
【】When a company uses an industrial chiller, if there is a serious leakage of refrigerant, it will inevitably cause the equipment to stop operating. Due to the complete safety pre-warning equipment of industrial chillers, in the case of severe refrigerant leakage, the system will automatically stop the operation of industrial chillers in order to reduce the probability of damage to other equipment. Especially for high-power types of industrial chiller equipment, when refrigerant leakage is encountered, it is necessary to find the location of the leakage in time and deal with it through professional means. And before daily operation of the industrial chiller, the refrigerant pressure must be carefully tested, and the industrial chiller equipment must be turned on within the range of maintaining the normal pressure. If it is found that there is a refrigerant leakage problem in the industrial chiller, the leakage gap must be sealed in time, and an appropriate amount of refrigerant must be added to ensure the safe operation of the industrial chiller in the later period.
The refrigerant leakage of the chiller is usually caused by a leak in the unit components, such as the evaporator, one of the four major components of the refrigeration system. After all, there are more welding ports on the left and right sides of the evaporator, and there may be more leakage points. This requires the welding technology of the factory's evaporator production staff to be excellent.
The evaporator will have leaks. The main reason is that the welding technology is not good. When the copper tube is not burnt red (the temperature does not reach 600℃～700℃), the welding rod is placed at the welding joint. The pipe and the solder are not fused together, resulting in pinch welding, slagging, and unevenness in the weld. After a long time of use, there will be leaks.
When the evaporator of the split air-cooled chiller leaks, s* first shut down the unit, and then call the manufacturer to arrange for after-sales service personnel to deal with it. When dealing with the problem of refrigerant leakage, the evaporator can be disassembled and welded. The method of disassembly is:
1. After identifying the leak point, mark it;
2. There is still refrigerant in the refrigeration system, and the refrigerant must be stored first;
3. Use two 8-inch or 10-inch wrenches to remove the connecting lock nut of the indoor unit, and remove the right side of the indoor unit Electrical box;
4. Remove the fixed pipes and splints on the rear side of the evaporator, and remove the left and right positioning screws of the indoor evaporator;
5. Lift the pipeline to move the evaporator forward. After pulling out the evaporator 5cm with your right hand, use both hands to rotate the evaporator 90 degrees and pull it out along the pipe (note the operation with both hands and do not knock the fins down).
After removing the evaporator, place it in a flat and clean place, wipe off the oil traces of the leak with a dry cloth, and solder the leak with silver solder. After the pressure check is confirmed that there is no leakage, follow the disassembly reverse Install the evaporator back to the indoor unit in sequence.
Of course, there are many possibilities for refrigerant leakage, not only the evaporator has a leak, which needs to be checked step by step.
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