Atmospheric air intake apparatus for coolers

Apparatus for utilizing exterior atmospheric air for cooling an enclosure having an inner surface comprising, in combination, a panel, means for mounting said panel upon the enclosure inner surface, an atmospheric air inlet defined in said panel, an enclosure air exhaust outlet defined in said panel spaced from said inlet, an electric exhaust fan mounted upon said panel for direct communication with the enclosure for selectively exhausting air through said exhaust outlet, a first air duct having a first end in alignment with and communicating with said panel inlet and a second end in communication with atmospheric air, an electric atmospheric air supply fan having an outlet in communication with said first air duct at said second end and located within the atmospheric air, a second air duct having a first end in alignment with and in communication with said exhaust outlet and a second end in communication with the atmospheric air, said exhaust and air supply fans having substantially equal air flow rates, and air temperature responsive fan control means electrically connected to said air supply and exhaust fans sensing the enclosure and atmospheric air temperatures to simultaneously energize said fans at predetermined enclosure and atmospheric temperature conditions.