US2018328610A1PendingUtilityA1

Air curtain apparatus

44
Assignee: DUBE SERGEPriority: May 10, 2017Filed: May 10, 2018Published: Nov 15, 2018
Est. expiryMay 10, 2037(~10.8 yrs left)· nominal 20-yr term from priority
Inventors:Serge Dube
F24F 9/00F24F 2009/005F24F 2009/007
44
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Claims

Abstract

An air curtain apparatus comprises a generally horizontal duct having at least one inlet and defining at least one outlet in a wall thereof. A plurality of axial fan units are mounted side-by-side across the at least one outlet defined in the wall of the duct, the axial fan units having rotational axes generally parallel to one another and side-by-side to blow air from an interior of the duct to an exterior of the duct. One or more grills are positioned adjacent to the axial fan units in a downstream flow path of the axial fan units, the grill(s) directing an air flow of the axial fan units into a downwardly directed air curtain. A method for creating an air curtain is also provided.

Claims

exact text as granted — not AI-modified
1 . An air curtain apparatus comprising:
 a generally horizontal duct having at least one inlet and defining at least one outlet in a wall thereof;   a plurality of axial fan units mounted side-by-side across the at least one outlet defined in the wall of the duct, the axial fan units having rotational axes generally parallel to one another and side-by-side to blow air from an interior of the duct to an exterior of the duct; and   at least one grill positioned adjacent to the axial fan units in a downstream flow path of the axial fan units, the at least one grill directing an air flow of the axial fan units into a downwardly directed air curtain.   
     
     
         2 . The air curtain apparatus according to  claim 1 , wherein the at least one inlet is open to a space proximal to the ceiling. 
     
     
         3 . The air curtain apparatus according to  claim 2 , comprising two of said inlet, with one said inlet being open to a space proximal to the floor. 
     
     
         4 . The air curtain apparatus according to  claim 3 , further comprising automated louvers at each said inlet to selective open and close access to the inlets. 
     
     
         5 . The air curtain apparatus according to  claim 4 , further comprising at least one thermostat operatively connected to the automated louvers to control their operation. 
     
     
         6 . The air curtain apparatus according to  claim 1 , wherein the at least one inlet is connected to an existing ventilation system. 
     
     
         7 . The air curtain apparatus according to  claim 1 , wherein the at least one inlet is connected to a dedicated rooftop make-up air unit. 
     
     
         8 . The air curtain apparatus according to  claim 7 , wherein the rooftop make-up air unit has a heating coil. 
     
     
         9 . The air curtain apparatus according to  claim 7 , wherein the rooftop make-up air unit has at least one fan. 
     
     
         10 . The air curtain apparatus according to  claim 9 , wherein the fan of the rooftop make-up air unit is a squirrel cage fan. 
     
     
         11 . The air curtain apparatus according to  claim 1 , wherein the at least one grill is at least one double louver grill. 
     
     
         12 . The air curtain apparatus according to  claim 11 , wherein a plurality of vents defined by the double louver grill each have a rectangular shape having a length ranging between 0.375″ and 1.125″. 
     
     
         13 . The air curtain apparatus according to  claim 12 , wherein the plurality of vents defined by the double louver grill each have a width ranging between 0.375″ and 1.125″. 
     
     
         14 . The air curtain apparatus according to  claim 12 , wherein the plurality of vents defined by the double louver grill each have a depth of at least 0.25″. 
     
     
         15 . The air curtain apparatus according to  claim 1 , comprising one of the at least one grill for each said axial fan unit. 
     
     
         16 . The air curtain apparatus according to  claim 1 , wherein each of the plurality of axial fan units is connected independently to a powering system. 
     
     
         17 . The air curtain apparatus according to  claim 1 , further comprising a door sensor determining an opening of at least one door associated with the air curtain apparatus, the door sensor operatively connected to the axial fan units to control their operation as a function of the opening of the at least one door. 
     
     
         18 . The air curtain apparatus according to  claim 1 , comprising at least one heating coil in the duct. 
     
     
         19 .- 26 . (canceled)

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