초록 ▼

An improved, low cost conditioned air vestibule for use on a doorway of a refrigerated storage room permits unobstructed passage of vehicles while effectively reducing the exchange of air through the doorway and substantially eliminating precipitation both inside and outside the doorway by providing

An improved, low cost conditioned air vestibule for use on a doorway of a refrigerated storage room permits unobstructed passage of vehicles while effectively reducing the exchange of air through the doorway and substantially eliminating precipitation both inside and outside the doorway by providing spaced inner and outer movable doors in a portal and extending across the doorway to define a closed entrance vestibule, and circulating conditioned air through the vestibule. Heated air is directed downwardly from adjacent the top of the doorway through the vestibule along substantially its full width and adjacent the surface of the inner or cold side door and air is withdrawn from the vestibule at the top of the doorway adjacent the outer or warm side door. The doors are spaced close together and actuators are provided for opening and closing both doors simultaneously to permit unobstructed passage of vehicles. Preferably, the doors are transparent strip doors permitting unobstructed vision through the vestibule while permitting passage through the doorway without opening the doors.

대표청구항 ▼

A conditioned air vestibule for controlling the flow of air through a door opening in a wall of a cold storage room and for reducing precipitation resulting from such air flow, said apparatus comprising, a frame including a pair of laterally spaced vertically extending side panels and a top panel, s

A conditioned air vestibule for controlling the flow of air through a door opening in a wall of a cold storage room and for reducing precipitation resulting from such air flow, said apparatus comprising, a frame including a pair of laterally spaced vertically extending side panels and a top panel, said frame being adapted to be mounted in contact with the refrigerated room wall in surrounding relation to the door opening with said side panels extending outwardly from the wall one adjacent each side of the door opening, said side and top panels cooperating to define an open portal projecting from the wall, first and second door panel means, mounting means supporting said first and said second door panel means for movement between a closed position extending across and closing said portal and an open position, said first and said second door panel means in the closed position being disposed in parallel planes spaced from one another in the direction of travel through the door opening a distance no greater than about one half the distance between said side panels and cooperating with said frame to define a closed vestibule, power means for substantially simultaneously moving said first and second door panel means between the open and closed positions, air outlet means extend through said top panel, said air outlet means being adapted to direct air into said closed vestibule adjacent the top of one of said door panel means along at least a major portion of the length of said top panel, air inlet opening means in said top panel for permitting escape of air from said closed vestibule, blower means operatively connected with said air outlet means and said air inlet means for circulating air through said closed vestibule, and heater means associated with said blower means for conditioning air in the closed vestibule to eliminate precipitation resulting from infiltration air and exfiltration air through the closed vestibule.