Compact internal window air conditioner

Abstract

A Compact Internal Window Air Conditioner (CIWAC) whose casing is adapted to be supported inside the room on the internal windowsill of a horizontally-sliding-pane window. In its installed state, the CIWAC does not interfere with the operation of the sliding windowpane. Further, the CIWAC comprises flexible sliding seals, which sealingly contact the sliding windowpane to reduce the cross-leakage of room-air and outside air. Height-adjustable pedestals are provided to further support the CIWAC from the floor. An electronic noise cancellation system is also provided to reduce the noise generated by the CIWAC during its operation. The CIWAC is relatively inexpensive to manufacture and does not need a wall-opening or modifications to the window for installation. Therefore, the CIWAC can be easily installed or uninstalled.

1 - 20 . (canceled) 
   
   
       21 ) A Compact Internal Window Air Conditioner (CIWAC) for installation on the internal windowsill of a horizontally-sliding-pane window, the CIWAC comprising a casing and a closed-circuit vapor-compression refrigeration system located within the casing, the casing having a narrow face-width and an elongated face-height, the aspect ratio “H/W” of face-height “H” to face-width “W” being greater than 3.5, the face-width dimension “W” being 10 inches or less, an indoors-facing wall of the casing having openings for circulation of the room air through the evaporator coil, an outdoors-facing wall of the casing having openings for circulation of the outside air through the condenser coil, further characterized in that the casing is adapted to be mounted totally inside the room on the inside windowsill of the horizontally-sliding-pane window without protruding through the window-frame or wall, the lower end of the casing having a means to engage the inside lower-sill of the window-frame, the casing being supported by the inside lower-sill of the window-frame. 
   
   
       22 ) The Compact Internal Window Air Conditioner of  claim 21 , wherein the means to engage the inside lower-sill of the window-frame is an inside corner in the lower wall of the casing. 
   
   
       23 ) The Compact Internal Window Air Conditioner of  claim 21 , further characterized in that the casing of the Compact Internal Window Air Conditioner does not interfere with the opening or closing of the sliding windowpane of the horizontally-sliding-pane window. 
   
   
       24 ) The Compact Internal Window Air Conditioner of  claim 23 , further comprising flexible air-seals on the casing, the flexible air-seals slidingly contacting the inside surface of the windowpane of the horizontally-sliding-pane window. 
   
   
       25 ) The Compact Internal Window Air Conditioner of  claim 23 , further comprising flexible air-seals which are installed on the inside surface of the windowpane of the horizontally-sliding-pane window, the flexible air-seals slidingly contacting the rear panel of the casing of the Compact Internal Window Air Conditioner. 
   
   
       26 ) The Compact Internal Window Air Conditioner of  claim 23 , further comprising a pedestal for supporting the Compact Internal Window Air Conditioner's casing from the floor. 
   
   
       27 ) The Compact Internal Window Air Conditioner of  claim 26 , wherein the pedestal is height-adjustable. 
   
   
       28 ) The Compact Internal Window Air Conditioner of  claim 21 , further comprising a fastener for attaching the Compact Internal Window Air Conditioner's casing to an inside wall surface of the room. 
   
   
       29 ) The Compact Internal Window Air Conditioner of  claim 27 , further comprising a fastener for attaching the Compact Internal Window Air Conditioner's casing to an inside wall surface of the room. 
   
   
       30 ) The Compact Internal Window Air Conditioner of  claim 21 , characterized in that, the intake and outlet openings for the cooling air for the refrigerant condenser coil flows are both located on the rear panel of the casing of the Compact Internal Window Air Conditioner. 
   
   
       31 ) The Compact Internal Window Air Conditioner of  claim 21 , characterized in that condensed water is collected from the evaporator coil and used to cool the refrigerant condenser coil. 
   
   
       32 ) The Compact Internal Window Air Conditioner of  claim 31  wherein the condensed water is sprayed on the refrigerant condenser coil. 
   
   
       33 ) The Compact Internal Window Air Conditioner of  claim 21 , further comprising a refrigerant flow reversing means to enable the operation of the Compact Internal Window Air Conditioner as a heat-pump. 
   
   
       34 ) The Compact Internal Window Air Conditioner of  claim 21 , further comprising an electronic noise cancellation system for reducing the noise generated during the operation of the Compact Internal Window Air Conditioner.