When our bicycle tires are flat, we need to
use an inflatable device to inflate the tires. Previously, artificial inflators
were used, but now more and more bicycle repair points have electric air pumps.
We just need to press the head of a long pipe on the air nozzle of the bicycle
and it will fill up in a few seconds. Sometimes when we are inflating, we are
frightened by the sudden sound of a motor. A closer look reveals that the other
end of the pipe is connected to a pneumatic compressor. We inflate with a tube
to make the pressure in the pressure vessel of the air compressor decrease. The
motor of the air compressor is started to ensure the pressure of the gas in the
container. But we didn't see anybody start up the compressor! Why does the air
compressor work by itself? In fact, there is no mystery, but there is an
automatic pressure switch on the air compressor to control the power supply of
the motor of the air compressor.
In fact, this kind of automatic pressure control switch
has been used in many devices. The
refrigeration compressor in the household refrigerator will start or stop the
air compressor according to the temperature in the refrigeration chamber, but
there is only one additional device in the refrigerator that reflects the
temperature through the pressure. In industrial production, many constructional
tools need to use air compressors, such as pneumatic drills, vibration rods and
so on. Many of these devices use diesel engines to move the compressor, and automatic pressure control switch
be used to adjust the throttle size of the diesel engine to control the gas
pressure in the compressor container.