Switchgear cabinet with at least one cabinet door and a fan-assisted air circulation on an interior

In a switchgear cabinet having at least one cabinet door and a fan assisted air circulation on an interior for cooling heat-generating devices installed in the interior which are disposed one above the other in tiers, the improvement comprising:

• a bottom part (12) of the switchgear cabinet (10) having an air supply opening (15) which feeds into an air-conducting chamber (13), the air-conducting chamber (13) supplied with one of external air and cooled air by the air supply opening (15), the air-conducting chamber (13) coupled to an air inlet opening (30) of a double-walled cabinet door (25, 27), the cabinet door (25) having a vertical air diffuser, an inner wall (27) of the cabinet door (25) oriented toward components (20) having air outlet openings (28), front ends of the components (20) oriented toward the inner wall (27) having air intake openings (21), the components (20) having intake fans for aspirating cooling air from the air diffuser of the cabinet door (25), and heated air emerging from back ends of the components (20) traveling out of the interior through ventilation openings (24) of a rear wall (23) of the switchgear cabinet.