Offset Window Mount Evaporative Cooler

Abstract

An offset window mount fan unit includes two or more independently controlled fans controllable to move air in the same direction or in opposite directions. A housing substantially offsets the fans from a direct passage of air into the room. In one embodiment, the fans are mounted in a housing perpendicular to the window, air traveling through the fans turning 90 degrees to pass through the plane of the window and 90 degrees down into the room. Each fan includes a temperature sensor to measure temperature of air moving through each fan. The fans are energized periodically for a short time period to make accurate temperature measurements. When the combined temperature measurements indicate an advantage from fan operation, the fans are activated. An evaporative cooling section may be attached to an outside portion of the unit to provide additional cooling.

I claim: 
     
         1 . An offset window mount evaporative cooler comprising:
 an offset fan housing;   an interior portion in fluid communication with a room interior;   an exterior portion in fluid communication with a room exterior;   a center portion configured to reside in a window opening and between the interior portion and the exterior portion and in fluid communication with both the interior portion and the exterior portion;   at least one fan in either the interior portion or the exterior portion of the offset fan housing;   an evaporative cooler housing extending down from the exterior portion of the offset fan housing and in fluid communication with the offset fan housing;   vents allowing ambient to enter the evaporative cooler housing;   pads in the path of the ambient air into the evaporative cooler housing;   a water supply in fluid communication with the pads; and   an air path through the vents, through the pads, and into the offset fan housing.   
     
     
         2 . The offset window mount evaporative cooler of  claim 1 , wherein the center portion of the offset fan housing has a smaller cross-section than either the interior portion or the exterior portion, reducing an amount of window area blocked by the offset window fan. 
     
     
         3 . The offset window mount evaporative cooler of  claim 1 , wherein:
 the exterior portion turns downward; and   the fan resides in the exterior portion.   
     
     
         4 . The offset window mount evaporative cooler of  claim 1 , wherein the water supply comprises a reservoir in the bottom of the evaporative cooler housing. 
     
     
         5 . The offset window mount evaporative cooler of  claim 4 , wherein a water source fills the reservoir through a valve responsive to a water level in the reservoir. 
     
     
         6 . The offset window mount evaporative cooler of  claim 5 , wherein the valve is closed by a float residing in the water in the reservoir. 
     
     
         7 . The offset window mount evaporative cooler of  claim 5 , wherein an overflow releases water from the reservoir if the water level rises above the overflow. 
     
     
         8 . The offset window mount evaporative cooler of  claim 4 , further including a pump in fluid communication with the water. 
     
     
         9 . The offset window mount evaporative cooler of  claim 8 , wherein the pump is in fluid communication with the water through a strainer or a filter. 
     
     
         10 . The offset window mount evaporative cooler of  claim 8 , wherein the pump advanced water through a water hose to a position above the pads and releases the water into the pads. 
     
     
         11 . The offset window mount evaporative cooler of  claim 1 , wherein an insulated adapter connects the evaporative cooler housing to the offset fan housing. 
     
     
         12 . The offset window mount evaporative cooler of  claim 1 , wherein the fan housing is a telescoping two piece housing having the interior portion and the exterior portion adjustable to sandwich a room exterior wall containing the offset window fan. 
     
     
         13 . An offset window mount evaporative cooler comprising:
 an offset fan housing;   an interior portion in fluid communication with a room interior;   an exterior portion in fluid communication with a room exterior;   a center portion configured to reside in a window opening and between the interior portion and the exterior portion and in fluid communication with both the interior portion and the exterior portion, the center portion having a smaller cross-section than either the interior portion or the exterior portion, the interior and exterior portion turning downward from the center portion;   at least one fan in the exterior portion of the offset fan housing;   an evaporative cooler housing extending down from the exterior portion of the offset fan housing and in fluid communication with the offset fan housing;   vents allowing ambient to enter the evaporative cooler housing;   pads in the path of the ambient air into the evaporative cooler housing;   a reservoir in the bottom of the evaporative cooler housing;   the reservoir configured to connect to a water source through a valve responsive to a water level in the reservoir;   the reservoir in fluid communication with the pads through a pump in fluid communication with the reservoir through a strainer or filter; and   an air path through the vents, through the pads, and into the offset fan housing.