Compressor oil quality and color detection

The air conditioner maintenance company believes that the oil quality of the compressor refrigerating oil is the basic guarantee for the good operation of the whole machine system. The key issue depends on the air conditioner's manufacturing and installation in strict accordance with the process operation requirements, from the production process to During the installation process, the vacuum in the refrigeration system of the air conditioner should meet the requirements. It is necessary to check the oil quality of the compressor during maintenance. To ensure the normal use effect and extend the life span.

For refrigerating oil verification, the presence of foreign matter and turbidity in the oil should be observed to determine the degree of contamination of the oil and refrigerant. Generally new machines or oils with good oil quality are clear and transparent and have no peculiar smell (no burnt smell).

How to deal with the clear and transparent color of the compressor refrigerating oil: When checking the compressor refrigerating oil, observe that the refrigerating oil is free of impurities, dirt, clear, transparent and odorless, and it is not necessary to change the compressor oil to continue using it.

Compressor refrigerating oil oil color yellowing treatment method: compressor refrigerating oil oil color has turned yellow, observe that the oil has no impurities and no burnt smell, and check whether the system enters the air and is oxidized (generally the normal compressor oil that has been used for many years) The color is not clear and transparent). As long as there is no moisture in the compressor, there is no need to replace the refrigerating oil. If the oil color becomes darker, you can remove the compressor to pour out the deteriorated oil, and use RF113 cleaning agent or carbon tetrachloride reagent to decompose the refrigeration system components and remove them. After the oil is cleaned, it is blown and dried with nitrogen, replaced with a new compressor oil, and vacuumed and filled with refrigerant.

The treatment method for the color of the compressor refrigerating oil turns brown: the color of the compressor refrigerating oil turns brown, the oil quality is turbid, and whether the smell is burnt, and the resistance value of the motor winding in the compressor is detected. If the resistance between the winding room and the shell is normal and well insulated, the refrigerating oil and cleaning system must be replaced. For pollution in the system pipeline, cleaning agent RF113 can be used to clean. Before cleaning, first discharge the refrigerant in the refrigeration system, then remove the compressor, pour the refrigerating oil from the process tube, during the cleaning operation, first remove the compressor and the filter drier, and then remove the capillary tube (or expansion valve). ) Disconnect from the evaporator, use a pressure hose to connect the evaporator to the condenser, and use a hose to firmly connect the cleaning equipment to the suction and exhaust pipes of the compressor. The equipment used for cleaning includes pumps, tanks, filters, and various valves for drying. The cleaning process is as follows: first inject the cleaning agent into the liquid tank, then start the pump, make it run, and start cleaning. Shanghai Decoration Design Co. reminds you to do it in the forward and reverse directions for many times, until the cleaning agent is not acidic. For mild pollution, it only needs to circulate for about 1 hour, while for severe pollution, it takes 3-4 hours.