Drain pan for packaged terminal air conditioner

Abstract

A wall sleeve drain pan for a packaged terminal air conditioner (PTAC) unit fits in a wall sleeve under the chassis of the air conditioner unit to receive overflow of condensate water from the chassis drain pan. The wall sleeve drain pan includes one or more arcuate channels that allow the condensate to drain to the front edge of the floor of the wall sleeve drain pan, and which resist the tendency of water to be blown towards the back of the wall sleeve drain pan by wind incident on the external opening of the PTAC unit.

What is claimed is: 
     
         1 . A wall sleeve drain pan for a packaged terminal air conditioner (PTAC), comprising:
 a front edge;   a rear side opposite the front edge;   a right side, and a left side opposite the right side, wherein the right and left sides each extend from the rear side to the front edge;   a floor defined from the right side to the left side and from the front edge to the rear side; and   at least one arcuate channel formed on the floor.   
     
     
         2 . The wall sleeve drain pan of  claim 1 , wherein the at least one arcuate channel is symmetric about a center between the right side and the left side, from the front edge to the rear side, wherein the at least one arcuate channel has a first end at the front edge on one side of the center and a second end at the front edge on an opposite side of the center, and a peak that is away from the front edge and on the center. 
     
     
         3 . The wall sleeve drain pan of  claim 2 , wherein the at least one arcuate channel is a plurality of nested arcuate channels. 
     
     
         4 . The wall sleeve drain pan of  claim 3 , wherein the plurality of nested arcuate channels are separated by raised sections of the floor, wherein the raised sections follow an arcuate path along the plurality of arcuate channels, and wherein the raised sections increase in height in a direction from the front edge to the rear side. 
     
     
         5 . The wall sleeve drain pan of  claim 4 , wherein the raised sections are broken along the arcuate path along the plurality of arcuate channels. 
     
     
         6 . The wall sleeve drain pan of  claim 5 , further comprising at least one intersecting channel formed by breaks in the raised section, wherein the at least one intersecting channel extends from the front edge to the rear side and intersects the at least one arcuate channel. 
     
     
         7 . The wall sleeve drain pan of  claim 6 , wherein the at least one intersecting channel is formed along a straight line perpendicular to the front edge to the rear side. 
     
     
         8 . The wall sleeve drain pan of  claim 6 , wherein the at least one intersecting channel follows an alternating path from the front edge to the rear side. 
     
     
         9 . The wall sleeve drain pan of  claim 4 , further comprising at least two chassis support portions formed in the raised sections. 
     
     
         10 . The wall sleeve drain pan of  claim 1 , wherein the floor is sloped upwards from the front edge to the rear side. 
     
     
         11 . The wall sleeve drain pan of  claim 1 , wherein the front edge includes a drip edge. 
     
     
         12 . A packaged terminal air conditioner (PTAC) unit, comprising:
 a wall sleeve;   a chassis including a chassis drain pan positioned in the wall sleeve;   a wall sleeve drain pan positioned in the wall sleeve, under the chassis, wherein condensate collected in the chassis drain pan drains into the wall sleeve drain pan, the wall sleeve drain pan having a front edge, a rear side opposite the front edge, a right side, and a left side opposite the right side, wherein the right and left sides each extend from the rear side to the front edge, a floor defined from the right side to the left side and from the front edge to the rear side, and at least one arcuate channel formed on the floor.   
     
     
         13 . The PTAC of  claim 12 , wherein the at least one arcuate channel is symmetric about a center between the right side and the left side, from the front edge to the rear side, wherein the at least one arcuate channel has a first end at the front edge on one side of the center and a second end at the front edge on an opposite side of the center, and a peak that is away from the front edge and on the center. 
     
     
         14 . The PTAC of  claim 13 , wherein the at least one arcuate channel is a plurality of nested arcuate channels. 
     
     
         15 . The PTAC of  claim 14 , wherein the plurality of nested arcuate channels are separated by raised sections of the floor, wherein the raised sections follow an arcuate path along the plurality of arcuate channels, and wherein the raised sections increase in height in a direction from the front edge to the rear side. 
     
     
         16 . The PTAC of  claim 15 , wherein the raised sections are broken along the arcuate path along the plurality of arcuate channels. 
     
     
         17 . The PTAC of  claim 16 , further comprising at least one intersecting channel formed by breaks in the raised section, wherein the at least one intersecting channel extends from the front edge to the rear side and intersects the at least one arcuate channel. 
     
     
         18 . The PTAC of  claim 17 , wherein the at least one intersecting channel is formed along a straight line perpendicular to the front edge to the rear side. 
     
     
         19 . The PTAC of  claim 17 , wherein the at least one intersecting channel follows an alternating path from the front edge to the rear side. 
     
     
         20 . The PTAC of  claim 15 , further comprising at least two chassis support portions formed in the raised sections.