Research of Hisense Home Appliance Products Energy Efficiency & Application

1. Research of Hisense Home Appliance Products Energy Efficiency & Application Hisense Co., Ltd. Reported By: Li Yanquan 2007-07-05

2. One. About Hisense Founded in 1969, Hisense now ranks No. 7 among top 100 electronic information businesses; Industry: Color TV, Refrigerator, Air-conditioner, Handset, Software & Network Equipment Annual Sales Revenue: RMB 43.5 Billion（2006） Public Company: 600060 Hisense Electric（Consumer Electronics） 000921 Kelon Electric（White Appliance） China Famous Trademark: Hisense, Kelon and Ronshen Production Base: Domestic: Nationwide（20 Plus） Overseas: South Africa, Hungary and France etc.

3. Two. Research of Hisense Energy Efficiency Refrigerator & Air-conditioner: Research of Inverter Technology & Improvement of Energy Efficiency TV: Standby Power Consumption & Work Condition Energy Efficiency Improvement

4. Three. Hisense Inverter Technology History of Inverter Technology Research 1995: Establishment of inverter technology research institute 1997: Cooperation with Sanyo and launch of AC inverter air-con 2000: Hisense independent R&D and launch of DC inverter air-con 2003: Hisense independent R&D and launch of DC inverter refrigerator 2004: Hisense independent R&D and launch of vector control DC inverter refrigerator

5. Three. Hisense Inverter Technology Why we apply inverter technology ? 1. The advantage of inverter technology lies in energy saving and noise reduction and its application in air-con can improve the comfort of housing environment and its application in refrigerator can improve the freshness of food. The research and application of inverter technology is the mainstream trend of technological and market development. 2. Comparing with DC inverter control technology, the vector inverter control technology is superior in technology and performance and it represents the trend of technological development in the future.

6. Three. Hisense Inverter Technology What is vector inverter ? The two technologies of DC and vector are featured by two energization modes and their performance is basically different. In DC control, two phases are energized simultaneously and the direction of electric current changes 6 times in each electronic cycle and the direction rotates 60 degree each time. The control is simple. The vector control, three phases are energized simultaneously and the direction of electric current changes over 100 times in each electronic cycle and it can rotate evenly and the control is complicated. Two Phase Energization(DC) Two Phase Energization(Vector)

7. Three. Hisense Inverter Technology Diagram of Driving Force DC Control Mode: There is moment fluctuation and loss in each direction change of 60 degree. Inverter Control Mode: It changes along the direction of tangent and the moment is stable. DC Control Mode Vector Control Mode In view of the advantage of vector control technology, Hisense decides to research the technology and its application in home appliance.

8. Rev Vector Control Module (dB(A)) DC Control Module (dB(A)) Decrease %（dB(A)） 1800 rpms 32.9 36.5 3.6 2700 rpms 36.6 38.1 2.5 3900 rpms 39.3 41.5 2.2 Three. Hisense Inverter Technology The Low Noise Feature of Vector Control Technology Driven Compressor Note: the above data is collected from the same refrigerator test sample and is the comparison of test result under the same conditions and in close quarters.

9. Item Hisense BCD-282VBP Hisense BCD-282BP Total Volume 282 262 282 Fridge 151 142 151 Variable Temp. Compartment 56 50 56 Freezer 75 70 75 Daily Consumption（kw.h/24h） 0.62 0.69 0.65 Compressor Driving Mode Vector Control Module High Efficiency Fixed Speed Compressor DC Control Module Three. Hisense Inverter Technology Comparison of Energy Consumption between Refrigerator and Product of Same Spec. Hisense BCD- 262TDe

10. Three. Hisense Inverter Technology Comparison of Refrigerator’s Fresh Keeping Through the application of the technology herein the refrigerator can retain constant low temperature status and effectively inhibit the denaturation of protein, prevent the increase of fruit respiration and the reduction of vitamin and improve the freshness. The following diagram is a comparison of the effect comparison with normal refrigerator after 7 days. Water Content Reduction VBN Variation Change of Protein & Fiber Reduction of Vitamin C

11. Three. Hisense Inverter Technology Performance of Air-con There is no specific national standard for inverter air-con. Shanghai has a relevant local standard: SEER (energy efficiency index) for class I inverter air-con is > 6.0. Hisense air-con KFR-22GW/99FZBp is an application of this technology and its SEER is 7.01. * The SEER of average fixed speed air-con is 2.8-5.0

12. Three. Hisense Inverter Technology Major Achievement Improvement of Electrical Performance, Reduction of Power Grid Impact & Interference In the project, research is conducted over vector control technology and it achieves precise control over vector compressor in home appliance, enhances the stability of compressor operation, improves the start up performance of compressor and reduced the impact and interference of power grid.

13. Three. Hisense Inverter Technology 2. Improvement of Air-con Comfort Performance & Refrigerator Fresh Keeping Performance Thanks to the application of vector control technology, it can maintain the low speed operation performance of the compressor and remarkably enhance the high-speed operation of the compressor. The temperature of the air-con can drop rapidly and maintain around the temperature required and meet the demand for comfort to the maximum. On the one hand, the wide range variable speed performance can ensure minimum fluctuation of the steady temperature of the refrigerator and on the other hand the fast freezing capability can improve the freshness of frozen food.

14. Three. Hisense Inverter Technology 3. Energy Saving & Noise Reduction Through the application of the technology herein, more energy-saving and low noise home appliance products are made available to the consumers. Besides, the consumption of materials is also reduced, which is conductive to the implementation of state energy-saving industrial policies and effectively alleviate the energy shortage in China. The application is wide.

15. Three. Hisense Inverter Technology 4. Improvement of Products Comprehensive Competitiveness The technology has wide application in Hisense refrigerator, air-con products and it is a new breakthrough in energy saving and fresh keeping (improvement of comfort). Hisense won “Top 10 Innovative Home Application Products in China 2005”, “Annual Innovation Design Award”, “Best Fresh Keeping Award” and “Energy Saving Contribution Award”. 2nd Prize of Scientific and Technological Advancement in Shandong 1st Prize of Scientific and Technological Advancement in Qingdao

16. Four. Research of Hisense TV Energy Saving Technology 1. Standby Power Consumption As per the statistics of authoritative department, The average standby power consumption of existing home appliance, audio-visual products and office equipment has accounted for about 10% of total power consumption in a home, equivalent to a 15-30W lamp lighting around the clock. The energy consumption is huge and the reduction of standby power consumption is the main target.

17. Four. Research of Hisense TV Energy Saving Technology 1. Standby Power Consumption Since March 2006, the standard “The Energy Efficiency Limit and Energy Saving Rating Value of Color TV Broadcasting Receiver” GB12021.7-2005 was enacted. The standby power consumption is below 9W and the energy saving standard is below 3W. In 2000, Hisense launched the 1st generation low-radiative and environment-friendly series products with standby power consumption of below 2W. In 2001, Hisense launched the 2nd generation environment-friendly product with standby power consumption of 0.7W.

18. Four. Research of Hisense TV Energy Saving Technology 2. Improvement of Unit Work Energy Efficiency

19. Four. Research of Hisense TV Energy Saving Technology 2. Improvement of Unit Work Energy Efficiency With respect to the LCD products, we interpedently developed the high-pressure inverter scheme so that the PS efficiency of the unit is lifted to 92% while that of the conventional scheme is no more than 82%. The variation of the ambient sunlight intensity is considered and the actual demand of customers is analyzed. Through technological problem tackling, Hisense took the lead to propose the LCD energy saving mode, under which as much as 40% energy can be saved.

20. Four. Research of Hisense TV Energy Saving Technology Achievement: The market share of Hisense FPTV is number one in China and Hisense is number one FPTV brand in China Winner of National Energy Saving Contribution Award

21. THANKS

22. Mr. Li Yanquan, senior engineer, director of Hisense Kelon Home Appliance System R&D Center and expert in audio-visual and home appliance refrigeration sector in Hisense Group. Mr. Li commits himself to R&D and management of color TV and refrigerator and he published 20 plus technical papers and applied six state invention patents. Besides, Mr. Li won technological advancement awards and invention awards in Qingdao and Shandong. In recognition of his achievement, Mr. Li is appraised as Qingdao senior expert, Qingdao talent with outstanding contribution and top talent in specialized technology. Mr. Li is also elected the member of standing committee of Qingdao Association for Science and Technology and recognized as expert in Shandong and national scientific program and technological award appraisal expert database.