Pressure switches are a very widely used instrument and have applications in many industries. There are many types of pressure switches, of which the air conditioning pressure switch is the most commonly used one. How much do users know about this air conditioning pressure switch? Today, Xiaobian mainly introduces the air conditioning pressure switch, so let’s take a look.
1. The air conditioning pressure switch is a protection switch. Now commonly used in cars is a three-state switch.
(1) Low-voltage protection switch: When the air-conditioning system has leakage or less refrigerant, in order to protect the compressor from damage, the compressor is forcibly stopped;
(2) Medium state switch: When the condensing pressure is high, the condensing fan is forcibly rotated at a high speed to reduce the high pressure and increase the cooling effect.
High-voltage switch, in order to prevent the system pressure is too large, causing the system to explode and so on, forcibly let the pressure [industrial electrical network-cnelc] shrink machine stop working. The protection switch is mounted on the high pressure side, and the values ​​are roughly 2KG, 15KG, 30KG. The design of each car is different, but it is similar.
2, the refrigerant is compressed into a liquid storage, so there is pressure
The pressure switch protects the normal operation of the air conditioning system. When the refrigerant pressure in the air conditioning system is too high or too low, the pressure switch is broken, so that the compressor does not work (the switch controls the relay such as the pressure switch, thereby controlling the compressor), and the protection system Parts are not damaged.
3, automotive air conditioning pressure switch, generally divided into two-state pressure switch and three-state pressure switch, the pressure switch is generally connected with the compressor, condenser electronic fan or water tank fan, controlled by the ECU on the car, according to the air conditioner The pressure change controls the opening and closing of the fan, or the amount of air. When the pressure is too high, the compressor is stopped and the system is protected.
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