How to Distinguish Between High and Low Pressure Pipes in Car Air Conditioning?
2 Answers
Car air conditioning high and low pressure pipes can be distinguished by observing the thickness of the pipes and comparing their temperatures. Below is an introduction to car air conditioning: 1. Introduction: Car air conditioning refers to the air conditioning device installed in a vehicle. 2. Function: It can cool, heat, ventilate, and purify the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety. The air conditioning system has become one of the indicators to measure whether a car is fully equipped. 3. Components: Generally includes refrigeration devices, heating devices, and ventilation devices. This combined system makes full use of the limited space inside the car, featuring a simple structure and ease of operation, making it a popular modern car air conditioning system internationally.
With decades of driving experience, I can tell you that distinguishing between the high-pressure and low-pressure pipes in a car's air conditioning system comes down to their location and temperature. The high-pressure pipe runs from the compressor to the condenser, responsible for delivering high-pressure refrigerant. It's usually located near the front of the engine and feels extremely hot to the touch—like summer pavement. The low-pressure pipe connects the expansion valve to the evaporator, feels cool or even icy, and is typically positioned beneath the cabin. Why does it matter? Touching the high-pressure pipe can cause burns, and when recharging refrigerant, you must identify the correct ports—high-pressure ports are red, low-pressure ones are blue (don’t mix them up). For routine maintenance, I recommend regularly checking for aging or leaks by spraying water and looking for bubbles. In short, remember: hot means high-pressure, cold means low-pressure—safety and peace of mind guaranteed.
