FIELD: measurement technology.
SUBSTANCE: in an air filter (Filt1) pollution monitoring method in a device in which airflow (A), generated by fan (F) coupled to motor (M), passes air filter (Filt1), contamination is determined using data representing fan (F) differential pressure (D2), air filter differential pressure (D1) and the motor current (I) for motor (M). This method involves the steps of: estimation of the flow through the air filter based on data representing differential pressure (D2) on fan (F) and motor current (I) for motor (M), evaluation of the resistance of the air filter on the basis of data representing the flow through the air filter and differential pressure (D1) on the air filter, and an assessment of air filter contamination based on data representing the resistance of the air filter.
EFFECT: method for monitoring the air filter is proposed.
4 cl, 2 dwg
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