Condensate pan for evaporator core in vehicle air conditioning system

Claim 1

An air conditioning system for a tractor comprising, a compressor driven by engine generated energy, a condensor, a vehicle cab defining a passenger compartment including a windshield, a roof panel and a ceiling in spaced relation defining an air passage, an evaporator core having an expansion valve and a heater positioned between said roof panel and ceiling transverse of the air passage with control means for controlling the temperature and humidity of air flowing through said passage, means supporting said evaporator core on said roof panel, an inlet connected to said air passage upstream of said evaporator core and an outlet having a deflector connected to said air passage downstream of said evaporator core for deflecting air on said windshield, a motor driven fan in said passage inducing circulation through said air passage for passing air across said evaporator core and heater, a lightweight condensate pan positioned immediately below said evaporator core consisting of urethane foam of closed cellular foam structure forming air cells in the entire structure of said condensate pan providing insulating quality in the walls of said condensate pan, means supporting said condensate pan on said evaporator core to provide drainage of condensate into said condensate pan, a base structure forming reinforcing ridges defining a partition means on said pan engaging the ceiling providing a partition intermediate the portion at said condensate pan containing condensate and the ceiling for directing air passage across said evaporator core, side panel portions mounted vertically on the side of said evaporator core directing condensate into the base structure, a liquid impervious skin surface of the urethane foam forming the interior and external surfaces of the walls of said condensate pan providing a barrier impervious to water, a drain passage means in said condensate pan for draining condensate from said evaporator core in said air conditioning system.