Double Decker Bus AC

The SZB-IIIA-D is a high-performance air conditioning unit designed for double-decker buses, delivering powerful cooling to ensure a comfortable passenger experience. With a cooling capacity of 52 kW, this system is ideal for buses ranging from 11 to 12 meters in length. It features a DANFOSS TGEN7 R134a expansion valve for optimized refrigerant control and a 6NFCY compressor with a 970 cc/r displacement, ensuring high efficiency and reliability.

Key Features & Benefits

Superior Cooling Performance

52 kW cooling capacity ensures rapid cooling for large double-decker buses.

Efficient DANFOSS expansion valve enhances system performance.

Optimized Airflow for Uniform Cooling

Condenser airflow: 14,400 m³/h (6 fans).

Evaporator airflow: 9,000 m³/h (12 blowers).

Ensures even temperature distribution throughout both decks.

Energy-Efficient Operation

Electricity consumption of 14 kW, balancing performance with energy efficiency.

Uses BSE55 lubricant for improved compressor durability.

Lightweight & Compact Design

Roof unit weight: 350 kg, designed to minimize impact on vehicle load.

Compact dimensions (2000 × 750 × 1180 mm) for easy installation.

Reliable Refrigeration System

Refrigerant type: R134a, an environmentally friendly cooling solution.

Refrigerant weight: 11 kg, ensuring optimal system efficiency.

Applications

Double-decker city buses operating in urban transit networks.

Tourist and intercity buses requiring efficient climate control.

Public transport fleets focusing on passenger comfort and energy savings.

1. The refrigerant is R134a.

2. The air-conditioning unit is overall installed  above the rear engine, and should be considered for installation to be shoveled in as a whole, and shoveled out for overhaul. The air duct of the transitional connection between the unit and the air duct in the car should be easily installed.

3. It must be ensured that the condensing fan air enters  and exhausts wind smoothly, and that the intake and exhaust air is effectively cut off without wind and short circuit. The wind speed of the vehicle side must be ≤5m/s.

4. The air duct of the transitional connection from the air conditioning unit to the air duct in the bus has a special shape, so the design should fully consider the operability of the installation and reduce the resistance of the air duct. The wind speed of the transition duct must be ≤12m/s.

5. The wind speed of the main air supply duct in the bus must be ≤8m/s.

6. It is best to set the air return grille separately according to the air volume ratio of the upper and lower floors. Or it can be set separately for the upper floor, and the lower floor returns air through the stairway.

7. Please contact us at [email protected] for more options and details.

Detailed Technical Introduction of the SZB Series Bus Air Conditioner

1. Adopt advanced condenser condensed water heat recovery technology to reduce the high pressure of the refrigeration system and improve the energy efficiency ratio of the product.

2. The overall frame structure is small in size and light in weight.

3. Customized development, modular design, quick response to market customer needs.

4. There are many varieties of products, which can cover 10-12 meters double-layer and one-and-a-half bus.

5. The evaporative air volume can be adjusted according to the use requirements to ensure uniform air output.