Answer: When the water level in the drainer water storage cup does not reach a certain height, the pressure of the compressed air will press the float down to close the drain hole, so that there will be no air leakage; as the water level in the water storage cup rises (there is no water in the cold dryer at this time), the float rises to a certain height and opens the drain hole, and the condensed water in the cup is quickly discharged out of the machine under the action of air pressure. After the condensed water is drained, the float closes the drain hole under the action of air pressure again, so the automatic drainer is an energy saver. It is not only used in cold dryers, but also widely used in various air source processing equipment such as gas storage tanks, aftercoolers and filters.
In addition to the commonly used float-type automatic drainer, electronic automatic timing drainers are also often used. The drainage time and the time interval between two drainages of this type of drainer can be adjusted, and it can withstand higher pressures and is also widely used.
