What is the normal pressure for adding refrigerant to a car?
1 Answers
Standard refrigerant pressure for car air conditioning: 1. When the compressor is running at 1500-2000 rpm, the high pressure (discharge pressure) should be around 1.5-2.0 MPa, and the low pressure (suction pressure) should be around 0.15-0.35 MPa under normal conditions. The exact values depend on the specific vehicle's air conditioning system configuration and ambient temperature. 2. At idle speed (engine 700-900 rpm), if the ambient temperature is high, such as under direct summer sunlight, the high pressure may be slightly higher, reaching up to about 2.5-2.8 MPa, but generally should not exceed 3.1 MPa. Introduction to car air conditioning refrigerant pressure: 1. The so-called car air conditioning refrigerant is commonly known as Freon, also referred to as "refrigerant" or "coolant" in the market, which is divided into environmentally friendly types (R134a) and non-environmentally friendly types (mainly F12). 2. The refrigerant pressure gauge, also known as a refrigerant meter or Freon gauge, is used to measure the current pressure of the refrigeration system. It is mainly used to detect the pressure values of the refrigerant at different stages of the system, allowing operators to understand the operating condition of the equipment. Currently, the accuracy requirement for refrigerant pressure gauges in China is to reach 2.5 grade.
