What is the working principle of an air conditioning pressure gauge?
1 Answers
The working principle of an air conditioning pressure gauge is that when the pressure in the system is higher or lower than the rated safe pressure, the disc inside the sensor moves instantaneously, pushing the switch contact to connect or disconnect via the connecting rod. When the pressure drops or rises to the rated recovery value, the disc instantly resets, the switch automatically resets, and the free end of the elastic element generates displacement, directly or after comparison, pushing the switch element to change its on/off state, thereby achieving the purpose of controlling the measured pressure. The manifold pressure gauge is an essential tool for repairing automotive air conditioning systems. Connected to the refrigeration system, it can perform vacuuming, refrigerant charging, and diagnose faults in the refrigeration system. The pressure gauge set has multiple uses, including checking system pressure, charging the system with refrigerant, vacuuming, and adding lubricating oil to the system. The manifold pressure gauge must be connected to the automotive air conditioning system using rubber hoses. Rubber hoses come in many different colors. Typically, the low-pressure side uses a blue hose, connected to the low-pressure side service valve; the high-pressure side uses a red hose, connected to the high-pressure side service valve; and green or yellow hoses are used to connect the vacuum pump or refrigerant tank.
