What is the problem when the high-pressure pipe of a car air conditioner has high pressure?
1 Answers
High pressure in the high-pressure pipe of a car air conditioner is caused by liquid slugging damage to the compressor. Below are detailed explanations of high pressure in the high-pressure pipe of a car air conditioner: 1. To test the compression efficiency of the compressor when the high-pressure pipe has high pressure, a three-way pressure gauge set should be connected for testing without disassembling the system. 2. The high-pressure range is 1.3-1.7MPa; the low-pressure range is between 0.1-0.25MPa. Insert the temperature probe of an electronic thermometer into the air outlet to obtain a temperature reading. 3. When there are oil traces on the clutch coil and the suction plate of the compressor, its shaft seal is definitely leaking. For dirt blockages, use nitrogen or dried compressed air to repeatedly blow through until it is clean and unobstructed. When there is a yellow-brown sticky liquid in the sight glass, it indicates that the system is dirty or there is excessive oil storage. 4. When there is a certain amount of refrigerant in the system, accelerating the engine should cause the low-pressure gauge needle to drop significantly, and the high pressure should also rise significantly. The greater the throttle, the more the needle drops, indicating good compressor performance; if the low-pressure gauge needle drops slowly and slightly during acceleration, it indicates low compression efficiency of the compressor; if the low-pressure gauge needle shows almost no response during acceleration, it means the compressor has no compression efficiency at all.
