The master of the dry bottle next to the pressure switch plug in the two lines connected to what is the meaning?
At present the car air conditioning installed in the liquid drier (dry bottle) is next to the high and low pressure three-position pressure switch
Three pressure switch (high and low voltage combination switch)
The three-position pressure switch is made of a pressure-receiving diaphragm, a disc spring, a shaft and a contact. Contact points for low voltage contacts and high voltage contacts.
The role of the three pressure switches is:
To prevent damage to the compressor (low pressure) due to system cooling leakage.
When the refrigerant inside the system is unusually high, the protection system is not damaged when the search is bad (high pressure).
In the working state, when the system pressure rises to the set value, the condenser fan is controlled at high speed (medium pressure).
Three pressure switch is generally installed in the liquid storage dryer, feel the pressure signal of the refrigerant high pressure circuit.
Three pressure switches
1. (low pressure) to prevent leakage of the system due to damage to the compressor compressor; pressure ≤ 0.196MPa
2. When the system refrigerant abnormal high pressure protection system is not damaged; pressure ≥ 314Mpa
3. Under normal conditions, the condenser fan low-speed operation, to achieve low noise, save power; in the system after the pressure rise (that is, when the pressure) fan high-speed operation to improve the cooling conditions of the condenser to achieve fan secondary speed. Pressure ≥ 1.6Mpa
This maintenance method can be used, if the pressure switch is broken, short circuit is no problem.
This can save freon, or else switch to have to re-fill.
This is a high pressure switch, is used to protect the system, when the system pressure to open a set range value, it will disconnect the power to stop the air conditioning work to achieve the role of protection. This two lines do not pick up.
