Does the air pressure sensor control the switch between the air conditioning fan and the tank fan? For example, when the air conditioner pressure sensor is broken, turn on the air conditioner. Will the fan turn? The 3 lines of the air pressure sensor are power supply, ground wire and signal wire respectively. Where does the power line come from? Is it a computer board? Where's the ground wire?
Can be understood as a switch. Normally closed and normally open two kinds. Generally more often closed.The principle is that when the pressure is beyond the set range, he works. The specific embodiment is that the original turn-on state is changed into an un conducting state, so that the computer board receives the signal of his change, and produces corresponding protection.You can work on specific lines to see which communication protocol you are using,Air pressure sensor you said three wire, three wire is generally a voltage output terminal (red power is a black (power), a yellow (negative), signal output is the output end) to the power of the total.
Equivalent to the switch, just to achieve automatic switch.Specific drawings wiring should be seen!
The air pressure sensor is the switch for controlling the fanPressure sensor is mainly to change the pressure signal into electrical signals, and some control instruments can be connected to control. It is a pressure sensor switch, for example with the switch lights at home, needs to use the hand to press, while the air pressure in the switch, start is the pressure within the system, when the pressure is higher than the set value, the switch to protect, in the course of the pressure switch can also pick up some peripheral equipment, such as fault indicator. What the general air-conditioning there is no pressure switch, various factors affecting the competitiveness of enterprises the most pressure sensor will take a temperature of a current.Some people say that the air conditioner switch is not a pressure sensor. Only switches, low voltage, high voltage switches are connected in series in the compressor clutch circuit, if the expansion valve is blocked, then the high pressure zone of liquid refrigerant more and more, in order to prevent the pipe burst. Set a certain pressure on the top, open electric shock, cut off compressor work. This will relieve the pressure in the high-pressure area. Low pressure is also used to prevent vacuum pumping in the low-pressure zone. When the pressure reaches a certain negative pressure, the contact is sucked off and the electromagnetic clutch power supply of the compressor is disconnected.
