Ventilating arrangement for the rooms of a building, especially of a stall, pigsty, fwl-house or the like

Claim 1

A VENTILATION UNIT COMPRISING AN INNER HOUSING ADAPTED TO BE MOUNTED ON THE INSIDE OF A WALL OF A ROOM TO BE VENTILLATED ASSOCIATED WITH A WALL OPENING DEFINED IN SAID WALL, SAID INNER HOUSING HAVING A FRESH AIR INTAKE OPENING EXTENDING OVER A FIRST PART OF THE CROSS SECTIONAL AREA OF SAID WALL OPENING, AN OUTLET OPENING FACING AND OPENING INTO THE INTERIOR OF SAID ROOM, A SEPARATION WALL DEFINING A FIRST AIR PASSAGE BETWEEN SAID FRESH AIR INTAKE OPENING AND SAID OUTLET OPENING AND EXTENDING INTO SAID WALL OPENING, AN EXHAUST OPENING EXTENDING OVER A SECOND PART OF THE CROSS SECTIONAL AREA OF SAID WALL OPENING, AN INLET OPENING FACING AND OPENING INTO THE INTERIOR OF SAID ROOM AND ARRANGED IN SAID HOUSING REMOTE FROM SAID OUTLET OPENING, SAID SEPARATION WALL ALSO DEFINING A SECOND AIR PASSAGE BETWEEN SAID EXHAUST OPENING AND SAID INLET OPENING, A BLOWER HAVING A HIGH PRESSURE SIDE AND A LOW PRESSURE SIDE MOUNTED IN SAID SECOND AIR PASSAGE FOR DRAWING A STREAM OF AIR FROM SAID INLET OPENING TO AND OUT OF SAID EXHAUST OPINGING, SAID SEPARATION WALL INCLUDING A PORT COMMUNICATING WITH SAID FIRST AND SECOND AIR PASSAGES ON SAID HIGH PRESSURE SIDE OF SAID BLOWER, AN ADJUSTABLE FLAP VALVE DEFINED IN SAID SEPARATION WALL AT SAID PORT FOR MOVEMENT BETWEEN A FIRST POSITION WHICH CLOSES AT LEAST PARTIALLY SAID EXHAUST OPENING AND SAID AIR INTAKE OPENING TO ESTABLISH AT LEAST A PARTIAL RECIRCULATION, AND A SECOND POSITION IN WHICH SAID FLAP VALVE CLOSES SAID PORT TO ESTABLISH TOTAL VENTILATION, SAID OUTLET OPENING DIRECTING AIR EJECTED THEREFROM AWAY FROM THE AIR STREAM ENTERING SAID INLET OPENING, AN OUTER HOUSING ADAPTED TO BE MOUNTED ON THE OUTSIDE OF SAID WALL OF SAID ROOM TO BE VENTILATED, SAID OUTER HOUSING COMPRISING AT LEAST ONE FRESH AIR INTAKE DUCT AND ONE EXHAUST DUCT FOR CONNECTING SAID FRESH AIR INTAKE OPENING AND SAID EXHAUST OPENING TO THE ATMOSPHERE, AT LEAST ONE NOZZLE MEMBER PROVIDED WITH SPRAY OPENINGS AND ARRANGED WITHIN SAID FRESH AIR INTAKE DUCT, AND CONDUIT MEANS INCLUDING AT LEAST ONE VALVE MEMBER FOR TEMPORARILY PROVIDING SAID NOZZLE MEMBER WITH A PRESSURIZED COOLING LIQUID.