Patent ID: 6295826
Filing Date: 2001-10-02
Classification: B60H,Y10S

Abstract:
A HVAC unit adapted to be mounted externally on the roof of a passenger bus and in communication with the interior of the bus, which comprises a housing having a forwardly facing opening, a rearwardly facing opening and a pair of spaced upwardly facing openings, a pair of condenser plenums mounted interiorly of said housing, one of said condenser plenums forming an air flow passage between the forwardly facing opening and one of the upwardly facing openings, the other condenser plenum forming an air flow passage between the other upwardly facing opening and the rearwardly facing opening, a refrigerant condenser mounted in each of said condenser plenums in said air flow passages, said housing having an air inlet adapted to be communicated with the interior of a bus and a conditioned air passage to return conditioned air to the interior of a bus, a pair of refrigerant evaporator plenums mounted in said housing in communication with said air inlet and conditioned air passages to form air flow passages between said air inlet and said conditioned air passage, a refrigerant evaporator mounted in each of said evaporator plenums in said air flow passages, a fan in each condenser plenum for circulating air through each air flow passage and each condenser, a conditioned air blower mounted in said housing for circulating air from the interior of the bus, in through the air inlet, through the evaporators and out through the conditioned air passage back into the interior of the bus, said housing including at least one motor driven compressor and refrigerant circulation system associated with said condensers and evaporators for conditioning air moving from and to the interior of the bus.