Control module for controlling of ventilation or air-conditioning unit has device which has filter for detection of current load condition and sensor to measure chemical condition of air flow which is flowing and not flowing through filter

摘要

Control module has device which has filter (F1,F2) for detection of current load condition, and sensor (SA1,SA2,SI1,SI2) which is made to measure chemical condition of air flow, flowing through filter and for measuring chemical condition of air flow, which is not flowing through filter. A value of current load condition of filter can be determined from differential signal of two measurements.