Patent ID: 6817940
Filing Date: 2004-11-16
Classification: F24F,H05K

Abstract:
Airflow unit, especially a filter fan or discharge filter with or without a fan (50) for installation in an installation opening (111) in a wall (110), of a housing that contains components that produce waste heat wherein the airflow unit (100) comprisesa ventilation grating (10), which consists of a frame (11) with a front plate (12) provided with strips and/or air slits (13) and a neck-like recessed insert (15), wherein the frame (11) holds a filter medium, a support member (20), which consists of a frame (21) with a peripheral wall surface (22a) that preferably expands outwardly wedge-like and with an interior space (25) for holding the neck-like recessed insert (15) of the ventilation grating (10), such that the support member (20), on its side facing away from the ventilation grating (10), is provided with airflow openings (27) and with water-diverting fins or rib formations for draining splash water and condensation water that have penetrated the unit, and serves to hold the neck-like recessed insert (15) of the ventilation grating (10), a shielding grating (30) with an EMC seal (31) for EMC damping, which is inserted in the support member (20) on the side facing away from the ventilation grating (10) and is held on the support member (20) by means of screw, rivet, adhesive, or clamp connections, and an IP seal (40) foamed onto the support member (20) for protection against splash water and spray water, such that all components of the airflow unit (100) are held together by clamp or screw connections, and wherein, to install the airflow unit (100) in the region of the installation opening (111) in the wall surface (22a) of the housing, the airflow unit (100) is placed on the outer wall surface (110a) of the wall (110) of the housing and is detachably connected with the housing wall (110).