Filtered air diffuser for e.g. food industry, has deflectors deviating air flow to widen path of airflow, and envelope surrounding lower wall and combining with deflectors to canalize widened air flow in parts

摘要

The diffuser (1) has a filtered air production box (3) producing an air flow in a vertical direction. Two deflectors (15, 16) are arranged in the path of the air flow and deviate the air flow for widening the path of the airflow. The filtered air producing box has a lower wall, and a protection envelope (9) surrounds the lower wall, where the deflectors are arranged at right opposite edges, respectively, of the lower wall. The envelope combines with the deflectors to canalize the widened air flow in external parts.