As we all know, the air conditioner compressor is the heart of the air conditioner. Once the compressor fails, the air conditioner can't work. At this time, we need to replace it and repair it in time. So what is the air conditioner compressor? How to replace it? The following decoration home decoration network small series will bring you the air conditioning compressor replacement method for your reference.
What is an air conditioner compressor?
The air conditioner compressor functions to compress and drive the refrigerant in the air conditioning refrigerant circuit. Air conditioner compressors are generally installed in outdoor units. The air-conditioner compressor extracts the refrigerant from the low-pressure zone and compresses it to the high-pressure zone for cooling and condensation. The heat sink radiates heat to the air, and the refrigerant also changes from a gaseous state to a liquid state, and the pressure rises.
The working circuit of the air conditioner compressor divides the evaporation zone ( low pressure zone ) and the condensation zone ( high pressure zone ) . The indoor unit and the outdoor unit of the air conditioner belong to the low pressure or high pressure area respectively ( depending on the working status ) . The refrigerant then flows from the high pressure zone to the low pressure zone, and is injected into the evaporator through the capillary tube. The pressure drops rapidly, and the liquid refrigerant immediately becomes a gaseous state, and a large amount of heat in the air is absorbed by the heat sink. In this way, the air conditioner compressor continuously works, and the heat of one end of the low pressure zone is continuously absorbed into the refrigerant and sent to the high pressure zone to be radiated into the air, thereby regulating the temperature.
Air conditioning compressor replacement method:
1. Turn off the power: Before replacing the compressor, be sure to cut off the power of the unit. Otherwise there is a danger of electric shock. When removing the compressor power supply, make sure that each wire and the corresponding terminal are marked for recovery after repair.
2, put the refrigerant: use the hex to open the high and low pressure side valves, pay attention to the ventilation of the working environment, so as to avoid the operator suffocation; the speed of the refrigerant can not be too fast, so as to avoid frost damage to the operating staff. If conditions permit, the refrigerant should be recycled instead of being directly discharged to protect the environment.
3. Remove the suction and exhaust pipes: Before removing the suction and exhaust pipes, ensure that the refrigerant in the system has been exhausted. The welding port is heated by gas welding, and after the solder is melted, the suction and exhaust pipes are pulled out. During the whole welding process, it is necessary to charge nitrogen, the nitrogen pressure is 0.5 ± 0.1kgf/cm2 to avoid oxidation of the copper tube to produce scale, and also pay attention to whether there is foreign matter in the inner wall of the copper tube, and if so, remove it in time. When welding, pay attention to control the direction of the flame, avoid the casing and sponge. Wires, etc.
4 , replace the compressor, and connect the suction and exhaust pipe: replace the new compressor, the compressor tilting angle should not be greater than 45 ° during the handling of the compressor . Before pulling out the compressor rubber plug, the suction pipe must be exhausted first, and the interval between pulling out the rubber plug to the welding pipe should not exceed 10 minutes to prevent air moisture and impurities from entering the system and affecting the performance of the unit. Before welding, remove the oil, oxide, burr and other debris on the surface of the joint and the joint of the joint to ensure the cleaning and drying of the welded joint. Nitrogen protection must be applied during the whole welding process. The nitrogen pressure is 0.5 ± 0.1kgf/cm2 , and the nitrogen gas is guaranteed to reach the welding position to avoid oxidation of the copper tube at the weld. When welding, pay attention to control the direction of the flame, avoid the casing and sponge. Wires, etc.
5. Pressure-preserving leak detection: After the suction and exhaust pipes are welded, it is necessary to maintain pressure and leak detection. The gas used for holding pressure can only be an inert gas such as nitrogen or carbon dioxide. It is strictly forbidden to replace it with air, oxygen, acetylene, refrigerant, etc., so as to avoid a safety accident. Before the pressure is pressed, the pressure detection instrument should be connected to the system pressure test leak detection line, and the compressed gas cylinder should be connected according to the safety requirements to check the opening condition of each valve of the system. If the pressure is not acceptable, the system has a leak. Be sure to check the system for leaks. After re-welding or repair welding after leaking, repeat the above pressure-holding steps until it is qualified.
6. Vacuuming: Before any system is installed, the refrigerant must be filled after pressure and leak detection, the system must be evacuated to remove air and moisture from the system. It is strictly forbidden to evacuate with a refrigerant purging pipe. This method is difficult to completely remove the air and moisture in the system, especially when the system pipe is long. It is strictly forbidden to use the compressor to run the exhaust gas to pump the vacuum, which will cause the compressor to burn. Vacuuming with a vacuum pump is the only way to ensure that the system removes air and moisture. When vacuuming, choose a suitable vacuum pump according to the length of the refrigerant pipe. A vacuum pump that is too small will result in an excessively long vacuum or a vacuum that is not required.
7. Irrigation medium: The filling amount of the unit should be calculated according to the requirements of the nameplate and the length of the connecting pipes of the internal and external machines. When filling, an electronic scale is needed to accurately measure the amount of refrigerant perfusion. The refrigerant is charged into the liquid pipe side in the form of a liquid, and the weighbridge is observed until the required amount of perfusion. If the system is not turned on and the system is not installed, let the system run at full load of refrigeration, the refrigerant is charged into the trachea side in a gaseous state, and the electronic scale is observed until the required amount of perfusion.
8. Trial operation: Restore the electrical components such as the compressor electric heating belt and the temperature sensing package to the original position. Restore power and ensure that the unit is well grounded. And jog the compressor to see if it reverses. Start the test run. Listen to the compressor, the fan has no abnormal noise, whether the operation of the air conditioner is normal, and whether the unit current is within a reasonable range. After all normal, the unit maintenance is completed.
The above is what Xiaobian brought to you. What is an air conditioner compressor? The whole content of the air conditioner compressor replacement method, I believe that everyone has a basic understanding of air conditioner compressor replacement after reading this article, if you want to know more about decoration consultation, please click to enter the decoration knowledge channel .
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