the men entry air showers are self-contained, air recirculation systems installed at entrances to cleanrooms and other controlled environments to reduce cleanroom contamination (dust free environment ) as workers enter the clean room production planetary. their process is similar to a pressure washer system at an automated car wash.
for example, a car enters the wash chamber, doors close at both ends, and high pressure streams of water from all angles blast the particles of dirt from the car. the cleaning cycle ends, a light comes on and the exit door opens.
with the air shower, a worker passes through the entry door and a sensor activates interlock magnets which then close the door. high velocity streams of class 100 filter air, from a large number of precisely placed, adjustable nozzles or vertical slots, is blown onto workers as they raise their arms and rotate in place. the high velocity air creates a flapping effect on the workers clothes which produces a “scrubbing” action, removing particulates from their cleanroom garments. indicator lights then signal the end of the cleaning cycle and the cleanroom door is opened. typically, it takes about 4 to 8 seconds for the cleaning time and then another 2 to 4 for the blower to wind down and give the air shower time to purge the contaminated air prior to the worker exiting. an adjustable microprocessor controls the cleaning and wait times.
