Saddle air conditioner

Abstract

This invention discloses a low-noise cross-wall (“saddle” shaped) air conditioner window unit. The unit includes an indoors casing that houses the condenser and compressor and an outdoors casing that houses the evaporator. A connecting frame (which straddles the windowsill) connects the indoors and outdoors casings. In a first embodiment, an axial condenser fan and a centrifugal fan evaporator fan are driven simultaneously by a dual-axle motor housed in the outdoors casing. The axle driving the indoors evaporator fan extends through the connecting frame over the windowsill. In a second embodiment, the evaporator fan is a cross-flow fan. Both features are designed to make the unit lightweight and quiet indoors. The full specification discloses additional novel features such as venting patterns and perforated frames, also for making the unit lightweight, efficient, and/or quiet. Installation is enabled with spacers or fasteners, not requiring support brackets.

I claim: 
     
         1 . A saddle-shaped window air conditioner comprising an indoor casing, an outdoor casing, and a connecting frame connecting the inner casing to the outdoor casing;
 said indoor casing comprising an indoor casing air inlet and an indoor casing air outlet;   said connecting frame comprising one or more horizontal frame components, an indoor vertical frame connected to the horizontal frame, an outdoor vertical frame connected to the horizontal frame, and an installation groove beneath the horizontal frame and between the vertical frames;   said indoor casing containing an evaporator, an expansion valve, a volute comprising a volute air inlet and a volute air outlet, and a centrifugal fan set in the volute;   said evaporator situated between the indoor casing air inlet and the volute air inlet;   said volute air outlet leading into the indoor casing air outlet;   said outdoor casing housing a compressor, a condenser, an axial fan, an air vent, and a dual-axis motor;   said condenser situated between the air vent and the axial fan;   said axial fan situated between the condenser and the dual-axis motor;   an outdoor drive shaft connecting the dual-axis motor to the axial fan;   an indoor drive shaft, coaxial with the outdoor drive shaft and connecting the dual-axis motor to the centrifugal fan;   said indoor drive shaft passing through the connecting frame;   a closed loop of refrigerant pipeline connecting the evaporator, the compressor, the condenser, and the expansion valve in series;   the portion of said pipeline between the evaporator and the compressor passing through the connecting frame;   the portion of said pipeline between the condenser and the expansion valve passing through the connecting frame.   
     
     
         2 . The air conditioner of  claim 1 , further comprising fasteners, said fasteners comprising fastening support, fastening screw, and retaining block;
 said fastening support fixed to the outdoor vertical frame;   said fastening screw having a frame end and a wall end;   said fastening screw frame end adjustably screwed into the fastening support;   said retaining block connected to the fastening screw wall end.   
     
     
         3 . The air conditioner of  claim 1 ,
 wherein said connecting frame components comprise exactly two crossbars;   further comprising a connecting cover plate over the crossbars.   
     
     
         4 . The air conditioner of  claim 2 ,
 wherein said connecting frame components comprise exactly two crossbars;   further comprising a connecting cover plate over the crossbars.   
     
     
         5 . The air conditioner of  claim 3 ,
 wherein the horizontal frame components and the vertical frame are square tubular with side walls;   further comprising a plurality of through holes uniformly disposed on the side walls of the horizontal frame components and of the vertical frame.   
     
     
         6 . The air conditioner of  claim 4 ,
 wherein the horizontal frame components and the vertical frame are square tubular with side walls;   further comprising a plurality of through holes uniformly disposed on the side walls of the horizontal frame components and of the vertical frame.   
     
     
         7 . A saddle-shaped window air conditioner comprising
 an internal machine comprising an upper part, an external machine comprising an upper part, and a connecting frame connecting the upper parts of the internal machine and the external machine;   said internal machine comprising an inner casing fixedly connected to the connecting frame;   said inner casing housing an evaporator component and an air supply component;   said external machine comprising an outer casing fixedly connected to the connecting frame, said outer casing housing a compressor, a condenser, and a cooling fan;   said inner casing comprising an upper part and a lower part;   a casing air inlet in the lower part of the inner casing, and a casing air outlet in the upper part of the inner casing;   said air supply component comprising a volute with an upper part and a lower part, fixed in the inner casing, and a cross-flow fan in said volute;   such that the casing air inlet opens into the lower part of the volute, and the upper part of the volute opens into the casing air outlet;   said evaporator component disposed between the casing air inlet and the lower part of the volute.   
     
     
         8 . The air conditioner of  claim 7 ,
 wherein the inner casing has a front surface and a bottom surface;   wherein the casing air inlet comprises air inlet mesh holes in the front surface and the bottom surface of the inner casing;   wherein said evaporator component is disposed obliquely so that it faces the air inlet mesh holes on both the front surface and the bottom surface of the inner casing;   
     
     
         9 . The air conditioner of  claim 7 , said outer casing comprising a wall-facing surface and an outdoors-facing surface;
 further comprising a wall-facing air inlet on the wall-facing surface;   wherein the condenser is situated adjacent to the outdoors-facing surface and the cooling fan is situated between the condenser and the wall-facing air inlet;   further comprising spacers connected to the wall-facing surface.   
     
     
         10 . The air conditioner of  claim 8 , said outer casing comprising a wall-facing surface and an outdoors-facing surface;
 further comprising a wall-facing air inlet on the wall-facing surface;   wherein the condenser is situated adjacent to the outdoors-facing surface and the cooling fan is situated between the condenser and the wall-facing air inlet;   further comprising spacers connected to the wall-facing surface.   
     
     
         11 . The air conditioner of  claim 9 ,
 wherein the cooling fan comprises a frame body, a motor with a output shaft, and fan blades;   wherein the frame body is fixed in the outer casing;   said frame body comprising a motor base and a fan blade protection ring connected to the motor base;   said motor mounted on said motor base;   and said fan blades mounted coaxially on the output shaft of the motor and positioned within the fan blade protection ring.   
     
     
         12 . The air conditioner of  claim 10 ,
 wherein the cooling fan comprises a frame body, a motor with a output shaft, and fan blades;   wherein the frame body is fixed in the outer casing;   said frame body comprising a motor base and a fan blade protection ring connected to the motor base;   said motor mounted on said motor base;   and said fan blades mounted coaxially on the output shaft of the motor and positioned within the fan blade protection ring.