The Bahman Bus Air Conditioner is used for air conditioning in medium-sized buses and commercial vehicles in Iran.
From a market supply and demand and technical perspective, non-independent, roof-mounted air conditioners have become the dominant product in the market and technical design.
Built-in air conditioners are typically split-body designs, located in confined spaces, with limited adjustable space and difficult maintenance.
Secondly, built-in condensers are typically located under the vehicle, in the skirt, or on the back. Their heat dissipation is inferior to that of roof-mounted, windward-facing air conditioners, and their lifespan is significantly affected by weather and road conditions.
Roof-mounted air conditioners are located on the vehicle roof, offer ample adjustable space, are easier to install and maintain, and are also less complex to develop. Windward-facing, roof-mounted air conditioner condensers offer better heat dissipation.
Existing roof-mounted air conditioners have complex base and housing structures and are installed in multiple sections. For installers, they must first connect the air conditioner's electrical components to the base, then sequentially connect the various base components, and finally install the various outer casings. This complex assembly process, resulting in a large number of parts, slows down the assembly process. This requires more workers for assembly during assembly line production and more warehouse space to sort and store parts, increasing manufacturing costs and limiting its use in large-scale production.
Bahman Bus Air Conditioner offers a top-mounted, parallel-flow, upwind-type bus air conditioner. The air conditioner's fixed panel is integrally formed from aluminum alloy sheet metal, while the air conditioner's outer casing is a one-piece, fiberglass-reinforced plastic (FRP) housing. This reduces the number of assembly steps and speeds up assembly efficiency.
The Bahman Bus Air Conditioner's technical solution is as follows:
A top-mounted, parallel-flow, upwind-type bus air conditioner includes a condenser, evaporator, expansion valve, dry-liquid reservoir, heat exchange fan, and blower motor.
Air conditioning piping interconnects the condenser, evaporator, expansion valve, dry-liquid reservoir, and compressor.
Also includes an air conditioner fixed panel and an air conditioner outer casing that covers the fixed panel. The air conditioner's fixed panel forms an evaporator chamber and a condenser chamber. The evaporator, fan motor, and expansion valve are mounted in the evaporator chamber.
The condenser, dry liquid receiver, and heat exchange fan are mounted in the condenser chamber.
A dividing wall, integrally bent and formed with the air conditioner's fixed panel, is located between the evaporator and condenser chambers.
The dividing wall is provided with a pipe hole for the air conditioning pipes.
A condenser bracket with a windward opening is welded into the condenser chamber.
The condenser bracket has ventilation holes on its sides.
Both ends of the condenser are mounted on the condenser bracket.
A fan cover covers the condenser.
Both ends of the condenser have lower legs secured to the condenser bracket and upper legs connected to the fan cover welded to their ends.
Angled fan motor mounts are welded on both sides of the evaporator chamber.
The fan motor mount is provided with a fan window.
An in-cabin air flow port, connected to the fan window, is provided at the bottom of the air conditioner's fixed panel.
The air conditioner housing is a monolithic fiberglass housing with a fan exhaust vent facing the heat exchange fan. Based on the bus body, the condenser chamber is located in front and the evaporator chamber is located in the rear. The air conditioner housing is provided with an air inlet located in front of the condenser chamber.
Further, the condenser is a parallel flow condenser.
Further, the air conditioner mounting panel, condenser bracket, and fan motor mount are all made of aluminum alloy and welded together.
Advantages and Features of the Bahman Bus Air Conditioner
Compact structure
Optimized air conditioning piping layout
Conservation of circuit and piping materials
Integrated roof-mounted air conditioner
Shortened flow distances between interconnecting pipes, further improving cooling efficiency
The entire roof-mounted air conditioner is defined by the mounting panel, which is formed integrally from aluminum alloy sheet metal.
The monolithic fiberglass housing reduces assembly steps and improves production efficiency. The Bahman Bus Air Conditioner includes:
a condenser 1, an evaporator 2, an expansion valve 3, a dry liquid reservoir 4, a heat exchange fan 5, and a blower motor 6.
An air conditioning pipe 7 interconnects the condenser 1, evaporator 2, expansion valve 3, dry liquid reservoir 4, and compressor.
Condenser 1 is a parallel flow condenser, and the compressor is externally connected.
It also includes an air conditioning fixed panel 8 and an air conditioning outer cover 9 covering the fixed panel 8. The fixed panel 8 forms an evaporator chamber and a condenser chamber.
The evaporator 2, blower motor 6, and expansion valve are mounted in the evaporator chamber.
The condenser 1, dry liquid reservoir 4, and heat exchange fan 5 are mounted in the condenser chamber.
A partition wall 80, integrally bent and formed with the fixed panel 8, is provided between the evaporator chamber and the condenser chamber.
Partition wall 80 is provided with a pipe hole for the air conditioning pipe.
A condenser bracket 81 with a windward opening is welded inside the condenser chamber. Ventilation holes 82 are located along the sides of the bracket. The condenser 1 is mounted on both ends of the bracket 81, and a fan cover 83 covers the condenser 1.
At each end of the condenser 1, lower legs are welded to the bracket 81, and upper legs are attached to the fan cover 83.
During assembly, the condenser is first secured to the bracket 81. The assembled fan cover 83 is then placed over the condenser 1 and bolted directly to the upper legs.
The edge of the fan cover 83 is then bolted to the edge of the air conditioner mounting panel 8.
Angled fan motor mounts 84 are welded to both sides of the evaporator chamber, each with a fan window 86.
At the bottom of the air conditioner mounting panel 8, an in-cabin air flow port 85 is connected to the fan window 86, providing access to the evaporator and condenser.
Air intake, whether for cooling or heated air circulation, is drawn from all four sides of the bottom of the air conditioner fixed panel 8. Parallel flow and copper core ventilation are also possible.
The air conditioner outer cover 9 is a one-piece fiberglass reinforced plastic (FRP) material. It features a fan exhaust vent 90 facing the heat exchange fan. Based on the bus body, the condenser chamber is located in front and the evaporator chamber is located in the rear. The air conditioner outer cover is located in front of the condenser chamber and features an air inlet vent 91.
The air conditioner fixed panel 8, condenser bracket 81, and fan motor mount 84 are all welded together from aluminum alloy.
The air conditioner fixed panel 8 is a one-piece bent aluminum alloy part.
The condenser chamber and evaporator chamber do not require bolts to connect again. The evaporator mounting bracket is also welded from aluminum alloy.
This air conditioner fixed panel is directly assembled on a production line in the welding group.
The pipes, wiring, and various electrical components of the air conditioner are manually connected on the assembly line, facilitating overall assembly. The air conditioner's electrical components are assembled in a modular, centralized manner, resulting in a compact structure, high energy efficiency, and easy installation.
Technical Features:
1. A ceiling-mounted, parallel-flow, upwind passenger bus air conditioner, comprising a condenser, evaporator, expansion valve, dry liquid reservoir, heat exchange fan, and blower motor, as well as air conditioning piping interconnecting the condenser, evaporator, expansion valve, dry liquid reservoir, and compressor.
The air conditioner also includes an air conditioner fixed panel and an air conditioner outer cover covering the fixed panel, with the evaporator and condenser chambers formed in the fixed panel.
The evaporator, blower motor, and expansion valve are mounted within the evaporator chamber. The condenser, dry liquid receiver, and heat exchange fan are installed in the condenser chamber.
A dividing wall, integrally bent and formed with the air conditioner mounting panel, separates the evaporator chamber from the condenser chamber. This dividing wall features holes for the air conditioning pipes.
A condenser bracket with a windward opening is welded into the condenser chamber. Ventilation holes are located on the sides of the bracket. Both ends of the condenser are mounted on the bracket. A fan cover covers the condenser. Lower legs secured to the bracket and upper legs connected to the fan cover are welded to each end of the condenser.
Angled fan motor mounts are welded to both sides of the evaporator chamber. These mounts feature fan windows. An inlet for cabin air flow, connected to the fan windows, is located at the bottom of the air conditioner mounting panel.
2. A top-mounted parallel flow upwind passenger air conditioner, characterized by: the air conditioner housing is a monolithic fiberglass reinforced plastic (FRP) material with a fan exhaust vent facing the heat exchange fan. The housing is positioned on the bus body, with the condenser chamber in front and the evaporator chamber in the rear. The air conditioner housing is provided with an air inlet in front of the condenser chamber.
3. A top-mounted parallel flow upwind passenger air conditioner, characterized by: the condenser is a parallel flow condenser.
4. A top-mounted parallel flow upwind passenger air conditioner, characterized by: the air conditioner mounting panel, condenser bracket, and fan motor mount are all made of aluminum alloy and welded together.
Technical Summary
A ceiling-mounted, parallel-flow, upwind passenger air conditioner consists of a condenser, evaporator, expansion valve, dry-liquid receiver, compressor, heat exchange fan, and blower motor, along with the air conditioning piping interconnecting these components.
It also includes an air conditioner mounting panel and an air conditioner housing, with the evaporator and condenser chambers formed on the mounting panel.
A condenser bracket with an upwind port is welded within the condenser chamber, and inclined blower motor mounts are welded to either side of the evaporator chamber.
The mounting panel is integrally formed from aluminum alloy sheet metal, while the air conditioner housing is integrally formed from fiberglass reinforced plastic.
This reduces the number of assembly steps and features a compact layout, optimized piping layout, and reduced material usage for circuits and piping.
The integrated ceiling-mounted air conditioner shortens the distance between interconnecting pipes, further improving cooling efficiency.
