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Our best selling electric bus air conditioner
Economy Air Conditioner for Bus, Coach, School Bus and Articulated Bus
Articulated Bus Air Conditioner
The SZQ Series Articulated Bus Air Conditioner is a high-performance cooling system designed for various bus lengths ranging from 7.5 meters to 12.9 meters. Engineered for optimal efficiency, these air conditioners utilize R134a refrigerant, Danfoss expansion valves, and BSE55 lubricant, ensuring reliability and environmental sustainability.
The series includes multiple models (SZQ-II-D, SZQ-III-D, SZQ-IV-D, SZQ-V/F-D, SZQ-VI-D, etc.) with cooling capacities from 20 kW to 40 kW, catering to different bus sizes and climate conditions. Each model is equipped with high-efficiency compressors (F400, 4TFCY, 4PFCY, 4NFCY, and 4GFCY) with varying displacement capacities, ensuring robust performance.
Key Advantages
High Cooling Efficiency
Standard cooling capacity up to 40 kW (136,480 Btu/h) to maintain a comfortable cabin temperature even in extreme conditions.
Efficient evaporators and condensers with optimized airflow design ensure rapid cooling.
Wide Application Range
Designed for buses from 7.5 meters to 12.9 meters, making it suitable for urban, intercity, and articulated buses.
Specially adapted for China’s climate conditions, ensuring consistent performance.
Reliable Compressor System
Uses high-performance compressors (F400, 4TFCY, 4PFCY, 4NFCY, and 4GFCY) with displacement capacities ranging from 400 cc/r to 750 cc/r.
Lower weight design (23kg to 34kg) improves fuel efficiency while maintaining durability.
Energy Efficiency & Power Consumption
Operates on 24V DC, with power consumption ranging from 56A to 100A, ensuring low energy usage while delivering strong cooling output.
Optimized fan and blower configurations (ranging from 3 to 5 condenser fans and 4 to 8 evaporator blowers) for efficient air circulation.
Lightweight and Aerodynamic Roof Unit
Constructed with compact dimensions (3430 mm to 4480 mm length) and lightweight materials (145kg to 228kg) to reduce vehicle load and enhance fuel economy.
Slim profile enhances aerodynamics, minimizing drag and improving overall bus efficiency.
Advanced Refrigeration System
Eco-friendly R134a refrigerant with precise refrigerant charge (4 kg to 10 kg) ensures optimal cooling performance while meeting environmental regulations.
Danfoss expansion valve enhances refrigerant flow control for improved system efficiency.
Durability & Low Maintenance
Built with high-quality components and corrosion-resistant materials for extended service life.
Low maintenance design with easy access to key components for quick servicing.
Model: | SZQ-II-D | SZQ-Ⅲ-D | SZQ-Ⅲ /F-D | SZQ-Ⅳ-D | |
Cooling Capacity | Standard | 20 kW or 68240 Btu/h | 24 kW or 81888 Btu/h | 26 kW or 88712 Btu/h | 28 kW or 95536 Btu/h |
(Evaporator Room 40°C/ 45%RH / Condenser Room 30°C) | Maximum | 22 kW or 75064 Btu/h | 26 kW or 88712 Btu/h | 28 kW or 95536 Btu/h | 30 kW or 102360 Btu/h |
Recommended Bus Length（Applicable to China's climate ） | 7.5 ~ 7.9 m | 8.5 ~ 8.9 m | 9.0~ 9.4 m | 9.5~ 9.9 m | |
Compressor | Model | F400 | 4TFCY | 4PFCY | 4PFCY |
Displacement | 400 cc/r | 475 cc/r | 558 cc/r | 558 cc/r | |
Weight (with Clutch) | 23kg | 33.7kg | 33kg | 33kg | |
Lubricant Type | BSE55 | BSE55 | BSE55 | BSE55 | |
Expansion Valve | Danfoss | Danfoss | Danfoss | Danfoss | |
Air Flow Volume(Zero Pressure) | Condenser (Fan Quantity) | 6000 m3/h (3) | 6000 m3/h (3) | 6300 m3/h (3) | 8400 m3/h (4) |
Evaporator (Blower Quantity) | 3600 m3 /h (4) | 3600 m3 /h (4) | 5400 m3 /h (6) | 5400 m3 /h (6) | |
Roof Unit | Dimension | 3430x1860x188(mm) | 3430x1860x188(mm) | 3680×1860×188(mm) | 3880×1860×188(mm) |
Weight | 145 kg | 152 kg | 167 kg | 175 kg | |
Power Consumption | 56 A (24V) | 56 A (24V) | 75.5 A (24V) | 76 A (24V) | |
Refrigerant | Type | R134a | R134a | R134a | R134a |
Weigh | 4.7 kg | 4.7 kg | 4 kg | 4.6 kg | |
Model: | SZQ-Ⅳ/F-D | SZQ-V/F-D | SZQ-Ⅵ-D | SZQ-Ⅵ /F-D | |
Cooling Capacity | Standard | 30 kW or 102360 Btu/h | 33 kW or 112596 Btu/h | 35 kW or 119420 Btu/h | 37 kW or 126244 Btu/h |
(Evaporator Room 40°C/ 45%RH / Condenser Room 30°C) | Maximum | 33 kW or 112596 Btu/h | 36 kW or 122832 Btu/h | 38 kW or 129656 Btu/h | 40 kW or 136480 Btu/h |
Recommended Bus Length（Applicable to China's climate ） | 10.0~ 10.4 m | 11.0~ 11.4 m | 11.5 ~11.9 m | 12.0~ 12.9 m | |
Compressor | Model | 4NFCY | 4NFCY | 4NFCY | 4GFCY |
Displacement | 650 cc/r | 650 cc/r | 650 cc/r | 750 cc/r | |
Weight (with Clutch) | 32kg | 32kg | 32kg | 34kg | |
Lubricant Type | BSE55 | BSE55 | BSE55 | BSE55 | |
Expansion Valve | Danfoss | Danfoss | Danfoss | Danfoss | |
Air Flow Volume(Zero Pressure) | Condenser (Fan Quantity) | 8400 m3/h (4) | 8400 m3/h (4) | 10500 m3/h (5) | 10500 m3/h (5) |
Evaporator (Blower Quantity) | 5400 m3 /h (6) | 7200 m3 /h (8) | 7200 m3 /h (8) | 7200 m3 /h (8) | |
Roof Unit | Dimension | 3880×1860×188(mm) | 4480×1860×188(mm) | 4480x1860x188(mm) | 4480×1860×188(mm) |
Weight | 177 kg | 195 kg | 228 kg | 203 kg | |
Power Consumption | 76 A (24V) | 92.5 A (24V) | 98A (24V) | 100 A (24V) | |
Refrigerant | Type | R134a | R134a | R134a | R134a |
Weigh | 5.0 kg | 5.5 kg | 10 kg | 6 kg | |
1. The whole system include the roof unit, air return grille, compressor, and the installation accessories, not include compressor bracket, belts, refrigerant.
2. The refrigerant is R134a.
3. The heating function is optional.
4. Compressor BOCK, VALEO or AOKE is optional.
5. The fan & blower as option like brush or brushless.
6. Please contact us at [email protected] for more options and details.
1. Beautiful Appearance
SZQ series air conditioner adopts thin design, the thickness of the air conditioner is 188mm, which is lower than the thickness of the current conventional air conditioner, which meets the requirements of the bus for the height control of the air conditioner. In addition, the appearance of the air conditioner is designed to be streamlined, which is in line with modern aesthetics and has a beautiful and fashionable appearance.
2. Lightweight design
The condenser uses a parallel flow core. The condenser base is designed as an inverted V-shaped frame without bottom shell structure. The evaporator assembly air duct adopts an innovative bottom shell integrated bending structure. Through the above methods, the weight of the air conditioner is greatly reduced.
Integrated Bending Air Duct
Parallel flow core and V-frame without bottom shell structure
3. Efficient heat transfer
In the design of the flow path of the parallel flow condenser, the high temperature area of the internal refrigerant corresponds to the area of the condenser's frontal wind speed. The heat resistance of the high temperature difference and the reasonable design of the process length are used to reduce the flow resistance. thereby increasing the heat of the condenser and exchange ability so as to maximize the efficiency of parallel flow heat exchangers.
4. Environmental protection
Compared with traditional tube-fin condensers, the SZQ series uses optimized parallel flow cores and optimization of air conditioning system piping. These helps to reduce the refrigerant charge by 40%. Thereby reducing the impact of refrigerant leakage on the environment.
Inverted V-shaped Frame
1. Defroster and Air conditioning in Driver's cabin
The defroster, and AC in driver's cabin can be installed according to customer's requirement, to provide a comfortable environment for the driver.
2. Integrated central control technology
The integration of the control panel and the vehicle instrumentation is convenient for the centralized layout of vehicle control. The remote control function of product control is added to facilitate customer operation management.
3. Plumbing and heating technology
The water heating pipe can be led out from the core of the evaporator to realize the heating function of the air conditioner and meet the requirements of the ambient temperature in the bus in the cold area.
4. Air purification technology
It includes mainly four functions: electrostatic dust collection, ultraviolet light, strong ion generator, and photocatalyst filtration, which can achieve full-time, uninterrupted anti-virus and sterilization, odor removal and efficient dust removal, effectively blocking the virus transmission path.
5. Remote control diagnosis technology
"Cloud control" function, realize remote control and diagnosis, and improve product service and monitoring capabilities through big data application.
6. Energy Regulation Technology
According to the temperature in the bus and the environment, the flow of the fan and compressor is adjusted in multiple stages to reduce the frequent start and stop of the compressor, improve the overall comfort of the passengers, and ensure that the system operates more efficiently.
Application
With the development of the market and the improvement of living standards, bus has gradually increased from traditional simple means of transportation to paying more attention to the improvement of comfort and transportation environment. Therefore, high-end passengers have been increasing year by year in recent years. SZR focuses on the appearance and is suitable for high- and mid-range buses. The market outlook is good.
1. The wide range of application
The bottom arc of the SZR series is suitable for roof arcs with a radius of 6~72 meters, the unit width is 1860mm, and the air outlet is directly fed into the air ducts on both sides of the bus, which is easy to install. The product series has 8 models from small to large, and the cooling capacity is 20~ 40KW, suitable for 8~13 meters buses.
5. Energy Regulation Technology
According to the temperature in the bus and the environment, the flow of the fan and compressor is adjusted in multiple stages to reduce the frequent start and stop of the compressor, improve the overall comfort of the passengers, and ensure that the system operates more efficiently.
Adapt to the wide range of roof curvature
2. Rich configuration Options
The SZR series is rich in configurations for different user groups, and there are multiple configurations for users to choose.
High-end configuration: mainly for the import configuration of public transport and high-end tourist buses, fans and other accessories
Economic configuration: It is mainly aimed at the configuration of economic buses, tourist buses, fans and other accessories.
3. Application Cases of the Bus Air Conditioner SZR Series:
Ankai(JAC)600 Bus installed with SONGZ air conditioner at Riyadh (Saudi Arabia)
Ankai(JAC)3,000 Bus installed with SONGZ air conditioner at Riyadh (Saudi Arabia)
Foton 1,000 Bus installed with SONGZ air conditioner at Naypyidaw (Myanmar)
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