Modular air conditioning apparatus

Claim 1

An improved air conditioning apparatus of the type requiring connection to a source of fluid heat transfer medium for air conditioning an area and disposable behind wall partitions or the like, comprising: an box frame having three open access sides; a mid-panel having an opening therethrough and supported by the frame and separating the frame into an upper plenum section and a lower operating section; a blower supported by the mid-panel in the operating section and disposed to blow air from the operating section through the opening in the mid-panel into the plenum section; a heat exchanger supported on the frame in the operating section and positioned along a selected one of the access sides; control means for sensing the temperature of the air in the area and for controlling the operation of the blower in response thereto; an outlet grille supported by the frame along one of the access sides and disposed to direct air from the plenum section; an intake grille removably supported by the frame and positionable at the selected access side in intake air relationship to the heat exchanger, the intake grille assembly defining an access port through which the blower, the heat exchanger and the control means are selectively removable from the operating section; a vertical supply riser pipe supported by the frame and having fluid communication with the heat exchanger; a vertical return riser pipe supported by the frame and having fluid communication with the heat exchanger; a vertical condensate drain riser pipe supported by the frame; a drain pan supported by the frame below the heat exchanger; a drain tube connecting the drain pan and the condensate drain riser pipe; and an electrical heater supported by the mid-panel in the plenum section and disposed in air heating relationship to the air blown by the blower through the opening in the mid-panel.