Window Fan

Abstract

In the specification and drawings a window fan is described and shown. The window fan cools a room using outside air when the room air meets certain criteria relative to a set point and the outside air meets certain preselected criteria relative to the indoor air. The window fan may also exhaust room air to the outside when the room air meets certain criteria relative to a set point and the outside air meets certain preselected criteria relative to the indoor air

1 . An window fan for cooling a building interior, comprising:
 a housing having an exterior side for positioning exteriorly of said building and an interior side for positioning interiorly of said building;   said housing having an outside air intake though which outside air is entrained on said exterior of said building, said outside air intake positioned lower on a surface of said housing;   said housing having an outside air output in fluid communication with said outside air intake, said outside air output positioned in said building interior;   said outside air intake and said outside air exhaust in fluid communication with a first fan;   said outside air intake having an outside louver, said outside louver having a preselected geometry which inhibits rain from entering said duct;   a first motor connected to said first fan causing rotation and entraining of said outside air from said building exterior into said air intake;   an inside air exhaust on an exterior surface of said housing positioned above said outside air intake, said inside air exhaust forcing contaminants in said outside air away from said outside air intake;   a dam disposed interiorly of said air intake, said dam inhibiting contaminants from passing through said duct in said housing;   a second exhaust fan which rotates to draw air from said building interior and forces air outward near a base of said housing;   a second motor connected to said second exhaust fan causing rotation and entraining of said inside air from within said building to outside said building.   
     
     
         2 . The window fan for cooling a building interior of  claim 1 , said outside air output and said inside air intake on said housing for positioning in said building interior. 
     
     
         3 . The window fan for cooling a building interior of  claim 2  further comprising actuatable louvers on said outside air output and said inside air intake. 
     
     
         4 . The window fan for cooling a building interior of  claim 3 , further comprising a control panel for operating said window fan. 
     
     
         5 . The window fan for cooling a building interior of  claim 4 , said control panel including an electronic controller which signals opening and closing of said actuatable louvers. 
     
     
         6 . The window fan for cooling a building interior of  claim 1  having a first airflow path and a second airflow path. 
     
     
         7 . The window fan for cooling a building interior of  claim 4 , said first airflow path separated from said second airflow path separated by a partition. 
     
     
         8 . The window fan for cooling a building interior of  claim 7 , one of said first airflow path and said second airflow path drawing air into said building interior. 
     
     
         9 . The window fan for cooling a building interior of  claim 8 , the other of said first airflow path and said second airflow path drawing air from said building interior. 
     
     
         10 . The window fan for cooling a building interior of  claim 7 , said partition having a sloped surface for draining any water from the housing. 
     
     
         11 . The window fan for cooling a building interior of  claim 1  further comprising a well positioned adjacent said dam for collecting water and draining said water from said housing. 
     
     
         12 . A window fan system, comprising:
 a housing having a frame and a partition defining a first air flow path and a second airflow path through said housing;   one of said first and second flow path drawing outside air into a building and the other of said first and second flow path drawing inside air out of the said building creating a circulation path;   a first blower in fluid communication with said first airflow path and a second blower in fluid communication with said second airflow path, said first and second blowers creating airflows;   a dam disposed along one of said first and second airflow path, said dam inhibiting water from passing from through said housing with said outside air, said dam having a sloped surface causing said water to gravity drain to a well;   said well having drain apertures releasing said water from said hosing interior to said exterior;   a rear louver disposed over the inside air exhaust and outside air intake, said louver having a plurality of fins of preselected geometry which inhibit passage of water through said louver;   said inside air exhaust blowing water and contaminants away from said outside air intake.   
     
     
         13 . A window fan for cooling a building interior by using exterior air having preselected characteristics, comprising:
 a housing having an air intake and an air exhaust output both in said housing and on an exterior side of said building;   an air output on an interior side of said building, said air output in fluid communication with said air intake through a duct in said housing;   said air exhaust in fluid communication with an exhaust intake on a building interior side of said housing;   a first fan disposed vertically above a second fan within said housing;   one of said first fan and said second fan in flow communication with said air intake and said air output, the other of said first fan and said second fan in flow communication with said air exhaust and said exhaust intake.   
     
     
         14 . The window fan for cooling a building interior of  claim 13 , said first fan and said second fan drawing warmer air from said interior side of said building and cooler air from said exterior side of said building. 
     
     
         15 . The window fan for cooling a building interior of  claim 14 , said first fan and said second fan removing warm air from in said building and increasing circulation for improved cooling. 
     
     
         16 . The window fan for cooling a building interior of  claim 13 , further comprising a partition separating a first airflow path from a second airflow path. 
     
     
         17 . The window fan for cooling a building interior of  claim 16  further comprising said first airflow path and said second airflow path moving in opposite directions through said housing. 
     
     
         18 . The window fan for cooling a building interior of  claim 13  further comprising a movable louver system for positioning on a building interior side of said housing. 
     
     
         19 . The window fan for cooling a building interior of  claim 18  further comprising at least one actuating motor connected to a linkage for opening and closing louvers. 
     
     
         20 . A window fan system, comprising:
 a housing having a control panel;   a first airflow path having a first blower drawing outside air into said system and exhausting said outside air into said system and exhausting said outside air inside a building;   a second airflow path having a second blower drawing inside air into said system and exhausting said inside air outside said building; and,   a room air intake in flow communication with said second airflow path and an outside air exhaust in flow communication with said first airflow path, said room air intake disposed above said outside air exhaust.   
     
     
         21 . The window fan system of  claim 20  further comprising a dam positioned generally along said second airflow path and inhibiting water from reaching said second blower. 
     
     
         22 . The window fan system of  claim 21  further comprising a well disposed at a lower edge of said dam. 
     
     
         23 . The window fan system of  claim 20  further comprising a louver system which closes said first and second airflow paths. 
     
     
         24 . The window fan system of  claim 23  further comprising a motor which actuates a linkage. 
     
     
         25 . The window fan system of  claim 24 , said linkage actuating a plurality of louvers in said first airflow path. 
     
     
         26 . The window fan system of  claim 25 , said linkage actuating a plurality of louvers in said second airflow path.