What does the air pressure sensor do? What's the working principle?
The pressure sensor the pressure signal conversion failure signal! Said pressure sensor red is a closed Xie, you use the electric field by analogy with Xie closed, left hand press, while the air pressure outside the closed Xie, Xie Chunong making style pattern not within the system pressure, under pressure to set set the value of the hour, Xie closed fracture V to cover of the utility, while in the closed pressure Xie also make some preparation in confining unloading, better than what hinder the indicator. The general air conditioning inside and outside are not without pressure or at least pay close Xie, a warm, a source of power.
First of all, pressure sensors and pressure switches are two different concepts, the pressure sensor is analog signals, pressure switches are digital signals. The pressure sensor outputs a 0-4V signal according to the pressure of the air conditioning system, and controls the mainboard or the CPU to make the load increase, the load reduction, the alarm and the stop operation according to the actual situation of the signal. The pressure switch is just to provide a digital volume 0 (open) or 1 (off), some units have both pressure switch and pressure sensor, for example, McQuay WHS series chiller, the pressure switch is installed in the compressor suction head, the pressure sensor in the gas pipeline, hope to help
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.
