Patent ID: 6915651

Claim:
A bus air conditioning system with at least one air conditioning module installed on a bus roof having a pair of supply air openings for conducting the flow of conditioned air downwardly near the outer side of the roof and a return air opening whose position is substantially varied in the lateral direction from a longitudinal central axis of the bus for any given installation, comprising: a refrigeration circuit for circulating refrigerant serially through a compressor, a condenser coil, an expansion valve and an evaporator coil; an evaporator section including an evaporator blower for causing return air to flow from said return air opening, into a return air compartment of said evaporator section, through said evaporator coil and then to said supply air opening; and a condenser fan for causing outside air to flow over said condenser coil and then to be discharged outside; wherein said compressor is a horizontally disposed hermetic compressor having a longitudinal axis, the compressor mounted proximate to the roof of the bus and external to the passenger compartment of the bus, the compressor oriented such that the longitudinal axis of the compressor is substantially transverse to the longitudinal axis of the bus.