Abstract: A module for a bus rooftop air conditioner is self contained in that it has all the necessary components including a compressor, if desired, which when supplied with electrical power, can provide conditioned air to the passenger compartment of a bus. In addition, an electrically powered heater is provided in the air flowstream such that heated air can also be supplied to the passenger compartment when desired. Multiple units provide for incremental capacity requirements to be met as well as limp home capabilities.

Abstract: A system and method for mounting one or more air conditioning modules to the roof of a bus is disclosed. The system and method includes standardized, modular air conditioning modules which are capable of fitting a wide variety of bus geometries, and are attached to the bus roof by a set of rails which are fastened to the roof, the rails having flanges and a length which are tailored to the bus roof configuration so as to provide a standardized alignment by capturing the roof rail in a channel shaped formation.

Abstract: A system and method for mounting one or more air conditioning modules to the roof of a bus is disclosed. The system and method includes standardized, modular air conditioning modules which are capable of fitting a wide variety of bus geometries, and are attached to the bus roof by a set of rails which are fastened to the roof, the rails having flanges and a length which are tailored to the bus roof configuration so as to provide a standardized alignment by capturing the roof rail in a channel shaped formation.

Abstract: A module is provided for attachment to the roof of a bus and includes all of the necessary components for conditioning the return air from the passenger compartment and delivering conditioned air thereto. Each module may include an evaporator section, a condenser section and a power section including a compressor and an inverter. The condenser section includes a condenser coil and a transverse fan with its axes disposed horizontally so as to draw air through a fresh air intake opening, through the coil and out a condenser discharge opening. The drain pan is shaped so as to form an air guiding wall around the fan, and a vortex wall is attached to the condenser coil support structure to separate low and high pressure sides of the fan. A rear wall and the fins of a discharge grill are angled with respect to the vertical plane so as to thereby prevent a recirculation of hot discharged air back into the air intake opening.

Abstract: A module for a bus rooftop air conditioner is self contained in that it has all the necessary components including a compressor, if desired, which when supplied with electrical power, can provide conditioned air to the passenger compartment of a bus. In addition, an electrically powered heater is provided in the air flowstream such that heated air can also be supplied to the passenger compartment when desired. Multiple units provide for incremental capacity requirements to be met as well as limp home capabilities.

Abstract: A bus air conditioning system with at least one air conditioning module installed on a bus roof. The air conditioning system 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 may vary substantially in the lateral direction from a longitudinal central axis of the bus for any given installation. The air conditioning system including a refrigeration circuit for circulating refrigerant serially through a compressor, a condenser coil, an expansion valve and an evaporator coil. The air conditioning system further including an evaporator section including an evaporator blower for causing return air to flow from said return air opening, into a return air compartment of the evaporator section, through the evaporator coil and then to the supply air opening. The air conditioning system further includes a condenser fan for causing outside air to flow over the condenser coil and then to be discharged outside.

Abstract: An air conditioning module is constructed to include all the necessary components for an air conditioning system within a single housing, with the housing having a supply air opening and a return air opening. The various components within the housing are so situated that the return air opening is relatively large in its lateral extension across the roof of a bus such that a single module can accommodate various configurations and locations of the supply air and return air openings in the roof of a bus.

Abstract: A compact rooftop air conditioning unit for a vehicle, said unit having an evaporator coil located adjacent to a condenser coil. At least one cylindrical blower is mounted adjacent the evaporator coil and is arranged to provide conditioned supply air to the interior of the vehicle. An electric motor is used to turn the shaft of the blower and a condensate pump is secured to the shaft for pumping condensate generated by the evaporator coil back over the condenser coil. An electrically driven compressor is housed within the unit and is arranged so that no refrigerant lines pass outside of the unit. An inverter is also housed within the unit and provides a regulated input to the compressor and the evaporator and condenser drive motors.

Abstract: A module for a bus rooftop air conditioner is self contained in that it has all the necessary components including a compressor, if desired, which when supplied with electrical power, can provide conditioned air to the passenger compartment of a bus. In addition, an electrically powered heater is provided in the air flowstream such that heated air can also be supplied to the passenger compartment when desired. Multiple units provide for incremental capacity requirements to be met as well as limp home capabilities.

Abstract: A module is provided for attachment to the roof of a bus and includes all of the necessary components for conditioning the return air from the passenger compartment and delivering conditioned air thereto. Each module may include an evaporator section, a condenser section and a power section including a compressor and an inverter. The condenser section includes a condenser coil and a transverse fan with its axes disposed horizontally so as to draw air through a fresh air intake opening, through the coil and out a condenser discharge opening. The drain pan is shaped so as to form an air guiding wall around the fan, and a vortex wall is attached to the condenser coil support structure to separate low and high pressure sides of the fan. A rear wall and the fins of a discharge grill are angled with respect to the vertical plane so as to thereby prevent a recirculation of hot discharged air back into the air intake opening.

Abstract: An air conditioning module is constructed to include all the necessary components for an air conditioning system within a single housing, with the housing having a supply air opening and a return air opening. The various components within the housing are so situated that the return air opening is relatively large in its lateral extension across the roof of a bus such that a single module can accommodate various configurations and locations of the supply air and return air openings in the roof of a bus.

Abstract: A compact rooftop air conditioning unit for a vehicle, said unit having an evaporator coil located adjacent to a condenser coil. At least one cylindrical blower is mounted adjacent the evaporator coil and is arranged to provide conditioned supply air to the interior of the vehicle. An electric motor is used to turn the shaft of the blower and a condensate pump is secured to the shaft for pumping condensate generated by the evaporator coil back over the condenser coil. An electrically driven compressor is housed within the unit and is arranged so that no refrigerant lines pass outside of the unit. An inverter is also housed within the unit and provides a regulated input to the compressor and the evaporator and condenser drive motors.

Abstract: A bus air conditioning system with at least one air conditioning module installed on a bus roof The air conditioning system 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 may vary substantially in the lateral direction from a longitudinal central axis of the bus for any given installation. The air conditioning system including a refrigeration circuit for circulating refrigerant serially through a compressor, a condenser coil, an expansion valve and an evaporator coil. The air conditioning system further including an evaporator section including an evaporator blower for causing return air to flow from said return air opening, into a return air compartment of the evaporator section, through the evaporator coil and then to the supply air opening. The air conditioning system further includes a condenser fan for causing outside air to flow over the condenser coil and then to be discharged outside.

Abstract: A module for a bus rooftop air conditioner is self contained in that it has all the necessary components including a compressor, if desired, which when supplied with electrical power, can provide conditioned air to the passenger compartment of a bus. In addition, an electrically powered heater is provided in the air flowstream such that heated air can also be supplied to the passenger compartment when desired. Multiple units provide for incremental capacity requirements to be met as well as limp home capabilities.

Abstract: A bustop air conditioning module is provided with an evaporator section having a return air opening and a condenser section having a fresh air opening. A mixer opening is provided between the fresh air opening and the evaporator coil, and a flap is selectively positionable to cover or uncover the mixer opening to allow a selective amount of fresh air to be passed to the evaporator coil. Simultaneously, the flap also to selectively block a portion of the return air flowing to the evaporator coil and at the same allow a portion of the return air to be exhausted from the system.

Abstract: Rather than having a frame into which, or upon which, an air conditioning system is mounted, a bus rooftop air conditioning module has a unibody which is formed partially of structural members interconnected to the tube sheets of the evaporator and condenser coils to form a structural body which supports the components of the system. In this way the coil tube sheets combine with other structural members to form the supporting body.

Abstract: A bus rooftop air conditioning system is made up of one or more self-contained modules having one or more evaporator sections and one or more condenser sections, with each extending transversely across the width of the bus, and with the evaporator sections fluidly communicating with both a common return air opening and a common supply air opening of the bus. The modules may be of a single unit configuration with a single condenser section and a single evaporator section or they may be of a double unit configuration having two condenser sections and two evaporator sections. The total capacity requirements are met by combining the use of single units and double unit configuration, with each of the evaporator sections communicating with a single return air opening and a single supply air opening in a bus.

Abstract: A module is provided for attachment to the roof of a bus and includes all of necessary components for conditioning the return air from the passenger compartment and delivering conditioned air thereto. A module can be ganged in various relationships to collectively provide the total capacity required by the bus. Each module includes an evaporator section, a condenser section and a power section including a compressor and an inverter. The evaporator sections have a return air compartment that extends a substantial distance across the roof of the bus such that a single design can meet the needs of various return air duct installations of various types of buses. Provision is made for the selectively mixing of return air with fresh air, with the mixture then being passed by the evaporator blower through the evaporator coils and into the supply air ducts.

Abstract: A module is provided for attachment to the roof of a bus and includes all of the necessary components for conditioning the return air from the passenger compartment and delivering conditioned air thereto. A plurality of modules can be mounted in various relationships to collectively provide the total capacity required by the bus. Each module includes an evaporator section, a condenser section and a power section including a compressor and an inverter. The evaporator sections have a return air compartment that extends a substantial distance across the roof of the bus such that a single design can meet the needs of various return air duct installations of various types of buses. Provision is made for the selective mixing of return air with fresh air, with the mixture then being passed by the evaporator blower through the evaporator coils and into the supply air ducts.

Abstract: A module is provided for attachment to the roof of a bus and includes all of necessary components for conditioning the return air from the passenger compartment and delivering conditioned air thereto. Each module includes an evaporator section, a condenser section and a power section including a compressor and an inverter. The evaporator sections have a return air compartment that extends a substantial distance across the roof of the bus such that a single design can meet the needs of various return air duct installations of various types of buses. Provision is made to interconnect a evaporator discharge opening with a supply air duct for the bus by way of a flexible duct having integrally formed end plates for connection by way of fasteners. The lower end plate which is secured to the supply air duct also includes an upstanding flange for connecting a protective cover thereto.