SONGZ Technology

R&D Capability

Founded in June,2011 and headquartered in Shanghai, Air Conditioning & Refrigeration Research Institute has established R&D centers in different cities in China, like Beijing, Chongqing, Nanjing, Hefei, Liuzhou, Suzhou and Xiamen where mainly SONGZ manufacturing base located and now it has many provincial and municipal technical centers and more than 350 engineering technicians, among whom those of master degree and above accounts for over 15%.

R&D Center

The Research Institute has applied for more than 1064 patents, including more than 321 patents for invention, and formulated 5 national standards, 11 industry standards and more than 100 enterprise standards. The Research Institute acts in industry-university-research cooperation with colleges and universities such as Shanghai Jiaotong University, Tongji University and Shanghai University of Science and Technology in technological breakthrough, industrialized process development, top talent cultivation and academic exchange.

In 2018, after SONGZ acquired and held shares of Finland Lumikko, the R&D center in Europe has been formed. 


SONGZ Patents Display

R&D Logic

Based on the main business of SONGZ in the field of bus air conditioner, car air conditioning, rail transit air conditioning, truck refrigeration units, the air conditioning and refrigeration research institute engages in construciton and application of 10 core capabilities. 


SONGZ Laboratory Center


SONGZ Laboratory center is located at SONGZ HQ, Shanghai China,  equipped with more than 20 sets of large and medium-sized testing equipments. Most of the equipments are domestic leading. The climatic wind tunnel, air conditioning performance test bench, semi-anechoic room and other key equipments reached the international advanced level. It has the comprehensive test capability for air conditioning component, AC system, HVAC and whole vehicle. CRM system is adopted in the test center to manage the test process, data and equipment. In 2016, it was recognized by ISO/IEC 17025:2005 system of China national accreditation service for conformity assessment and in 2018, SONGZ laboratory center has been accredited by BYD as the Supplier Laboratory Accreditation Certificate. 

Air Conditioning Performance Test Bench

Air Conditioning Performance Test Bench

Semi-anechoic Room_看图王

Semi-anechoic Room

Air Volume Test Bench_看图王

Air Volume Test Bench

Vibration Test Bench_看图王

Vibration Test Bench

Constant Temp. & Humid Test Chamber_看图王

Constant Temp. & Humid Test Chamber

Internal Corrosion Test Bench_看图王

Internal Corrosion Test Bench



Laboratory Accreditation Certification from CNAS


Supplier Laboratory Accreditation Certification from BYD


PSA A10 9000 Certificate

Vehicle Climate Wind Tunnel

SONGZ climatic wind tunnel integrated the defrosting automatic surveying and mapping system for the first time in China. Based on high-definition photography and image processing technology, the defrosting area was measured and calculated in real time, which effectively improved the test efficiency. It is also the first climatic wind tunnel that integrates 60 kW DC fast charging piles, which provides a powerful guarantee for the development of new energy vehicle battery thermal management systems.

The climatic wind tunnel center is located at SONGZ HQ, in Shanghai, China, which covers an area of 1,650 m² and has an investment of USD 17 million. It was officially put into use in June 2018, and its technical level is leading globally. 


Simulation Test

Vehicle air conditioning cooling performance test, vehicle air conditioning maximum heating performance test, vehicle cold start test, air conditioning controller calibration test, vehicle air conditioning defrosting/defogging performance test, air conditioning performance test, air conditioning performance test under working conditions in typical cities, vehicle air conditioning system dynamic response test.


The design and manufacture of subsystems all adopt excellent sub-suppliers in the industry. Solar simulation, chassis Dynamometer, main fan, cooling system, test chamber and other major equipment are imported from Germany, can simulate the -30 ℃ - + 60 ℃ environmental temperature, 5%-95% of the environmental humidity, with full spectrum solar simulation function and can carry out four-wheel drive chassis power meter device.

The wind tunnel can not only test the air conditioning and cooling systems of conventional passenger vehicles, but also static tests of buses within 10 meters in length and 10 tons in weight. 

Type Test


Research and Development Trend of New Energy

1. Research on the application of various refrigerants

No Refrigerant Ozone Depleting Potential(ODP) Global Warming Potential (GWP)
1 R134a 0 1430
2 R410a 0 2100
3 R407C 0 1800
4 R404A 0 3900
5 R32 0 675
6 CO2 0 1
7 R1234yf 0 1
8 R290 0 3

2. Application of enhanced vapor injection compressor technology in the field of electric vehicle air conditioning 


After using increasing enthalpy by replenish gas technology, in environmental temperature -25 ℃ condition, air conditioning system can run normal heating, compared to past equipment under the condition of COP value will increase by more than 30%, leading the era of "cold".


Increasing Enthalpy by Replenish Gas AC diagram

3. Low temperature heat pump:

Heat pump from the current work critical temperature - 3 ℃, can reduce the - 20 degrees Celsius;

The energy efficiency is better than the current use of PTC electric auxiliary heating method, the target is 1.8.


4. CO2 compressor application - ultra-low temperature heat pump/battery heating system 


Application of CO2 natural environmental refrigerant;

Unique dual rotor double - stage compression, high volume efficiency, low vibration;

Internal high pressure and internal medium voltage multimeter dc inverter drive, 40 ~ 100Hz, wide frequency range operation; High reliability, high energy efficiency, lightness ;

Wider operating range, in - 40 ℃ environment temperature is inferior to normal heating.