Supply air blower design in bus air conditioning units

Details Supply air blower design in bus air conditioning units Supply air blower design in bus air conditioning units

2003-05-05

2004-04-13

Jones, Melvin (Department: 3744)

Refrigeration

With means preventing or handling atmospheric condensate...

Means utilizing heat developed by refrigeration producer

C062S429000

Reexamination Certificate

active

06718787

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATIONS
This application is related to the following pending applications being concurrently filed herewith and assigned to the assignee of the present invention:
Title
Our Docket No.:
Modular Rooftop Air Conditioner for a Bus
210_546
Modular Bus Air Conditioning System
210_545
Supply Air Blower Design in Bus Air
210_549
Conditioning Units
Bus Rooftop Condenser Fan
210_550
Method and Apparatus for Refreshing Air
210_548
in a Bustop Air Conditioner
Coil Housing Design for a Bus Air Conditioning Unit
210_547
Integrated Air Conditioning Module for a Bus
210_558
Fresh Air Intake Filter and Multi Function Grill
210_554
Integrated Air Conditioning Module for a Bus
210_557
Modular Air Conditioner for a Bus
210_561
Modular Air Conditioner for a Bus Rooftop
210_562
Evaporator Section for a Modular Bus Air Conditioner
210_564
Wide Evaporator Section for a Modular Bus Air
210_565
Conditioner
Condensate Pump for Rooftop Air Conditioning Unit
210_568
Condensate Removal System Rooftop Air
210_551
Conditioning
Modular Rooftop Unit Supply Air Ducting
210_577
Arrangement
Configuration for Modular Bus Rooftop Air
210_595
Conditioning System
Unibody Modular Bus Air Conditioner
210_596
FIELD OF THE INVENTION
This invention relates in general to an air conditioning unit and more specifically to a rooftop air conditioning unit for a vehicle such as a bus.
BACKGROUND OF THE INVENTION
The most common approach for air conditioning the interior of a bus is to mount the air conditioning components on the roof of the vehicle. It has been the common practice in the industry to locate the compressor for the unit in the vehicle motor compartment so that it can be driven directly from the engine. The compressor, in turn, must be connected to the air conditioning unit by means of refrigerant supply and return lines. This requires running an extensive amount of piping through the bus between the engine compartment and air conditioner.
in existing bus air conditioning units, 24 V DC double radial blowers are commonly used to blow the supply air stream into the vehicle. The blower assembly contains the blower motor, the blower housing and the blower wheel. The complete assembly is mounted to the evaporator housing. To create the required supply air flow, multiple small double radial blowers are used with multiple small DC motors. The number of blower motors and wiring add to the cost of the system, and present a problem with respect to serviceability and accessability of the blower motors because of their placement in the system.
SUMMARY OF THE INVENTION
It is therefor an object of the present invention to provide an improved air conditioning unit that is mounted upon the roof of a bus or other similar type of vehicle.
It is a further object of the present invention to provide an improved air blower design for an air conditioning unit that is mounted upon the roof of a bus.
It is another object of the present invention to reduce the number of blower motors and wiring in a low profile air conditioning unit that is mounted upon the roof of a bus.
An other object of the present invention is to provide for an increase in efficiency by improving the air flow into a radial blower housing for a rooftop air conditioning unit of a vehicle.
These and other objects of the present invention are attained by a compact rooftop air conditioning unit for a bus or similar type vehicle that contains an electrical driven compressor and an inverter for regulating the electrical input to the electrical components contained within the unit. The evaporator coil of the unit is mounted in front of the condenser coil and a plurality of cylindrical blowers are mounted adjacent the evaporator coil upon a horizontally disposed shaft which, in turn, is rotated by an electrical motor. A drip pan is positioned beneath the evaporator coil and is arranged to pass the collected condensate into the sump of the pump housing through an inlet port.
In the present invention a single blower motor is mounted on the side of the unit. This blower motor drives an elongated blower shaft, which is supported through a shaft bearing mounted at its end. A plurality of blower wheels are directly mounted to, and driven by the blower shaft.


REFERENCES:
patent: 3756039 (1973-09-01), Riello
patent: 4641502 (1987-02-01), Aldrich et al.
patent: 4672818 (1987-06-01), Roth
patent: 5094089 (1992-03-01), Lail
patent: 6357249 (2002-03-01), Robinson et al.
patent: 411198639 (1999-07-01), None
patent: 411208259 (1999-08-01), None

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