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388 F22B9/00-F22B9/16：Steam boilers of fire-tube type, i. e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body；F22B27/00-F22B27/16：Instantaneous or flash steam boilers；F22B29/00-F22B29/12：Steam boilers of forced-flow type；F27D17/00：Arrangement for using waste heat (heat-exchangers per seF28); Arrangement for using, or disposing of, waste gases (removing fumes in general B08B 15/00) As can be seen from Table 1, innovation activities in the two technological fields are not active, totally granted patents is 423, accounting for 12. 73% of patents of the energy-saving industry. The creative capability of industrial boiler design and manufacturing technology is obviously insufficient, only granted 35 patents in the past 6 years. In specific technical items, the granted patents of F22B27/00-F22B27/16, only 8, are the least, while F27D17/00 gets a relatively large amount. Compared with foreign patentees, the granted patents of domestic take an absolute advantage both in the two technological fields, with a number of 361, accounting for 85. 34% of the total granted patents in the two technological fields. And foreign patentees were only 62 granted patents. It shows that in terms of quantity, there is not threat to the related technology development in China for foreign patentees in the two domains. Distributions of granted patents in the technological fields of environmentally air conditioning and heat pump. Table 3 shows distributions of granted patents in the technological fields of environmentally air conditioning and heat pump technology. Table 3. Distributions of granted patents in the technological field of environmentally air conditioning and heat pump（2008-2013） States/Areas Environmentally air conditioning and heat pump technology F24F1/00-F24F1/04 F24F3/00-F24F3/16 F24F5/00 F25B30/00-F25B30/06 CN 462 532 447 367 JP 295 163.
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[14] [6] [6] TOTAL 1025 866 571 437 2899 F24F1/00-1/04: Room units, e. g. separate or self-contained units or units receiving primary air from a central station ；F24F3/00-3/16: Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems；F24F5/00：Air-conditioning systems or apparatus not covered by group F24F 1/00 or F24F 3/00；F25B30/00-30/06：Heat pumps As shown in table 3, the innovative capabilities in the field of environmentally air conditioning and heat pump technology are strongest the energy-saving industry in China. The granted patents occupy an absolute advantage in the industry, with a total of 2, 899 patents, accounting for 87. 27% of total patents. In specific technical items, four specific technologies in the field develop well, of which granted patents are higher than other areas of specific technical items. The amount of F24F1/00-F24F1/04 technology item is the most, up to 1025 granted patents. Compared with foreign patentees, 1808 patents are granted to the domestic patentees, while the foreign patentees get 1092. It can be seen that the competition between domestic and abroad is fierce, and the development of domestic technology is not dominant in the field of environmentally air conditioning and heat pump technology. Foreign patentees are most from Japan, Korea, the European Union, the United States and other countries or regions. Japan and South Korea patentees attain a larger grants among the foreign patentees, accounting for 87% of the total foreign granted patents. The energy-saving industry in China, the key researches, domestic and abroad, are consistent, both absolutely focusing on the field of environmentally air conditioning and heat pump technology. Although the domestic granted patents take advantage in the overall numerical value, domestic granted patents are lower than other countries in some specific technical items. For instance, in the technical item of F24F1/00-F24F1/04, the domestic shared 462 patents, while foreign patentees get 563 patents granted, 101 more than the domestic. It indicates that some core technologies are still controlled by foreign patentees in China's energy-saving industry, hindering the further development of domestic industry. Conclusions The energy-saving and environmental protection industry is one of the seven strategic emerging industries, which is the key industry to change the economic development mode, promote and upgrade the industrial chain in China[9] Zhang Yangping, Tang Xuan. Development theories of strategic emerging industries and practice experiences for reference: A case study of the energy saving and environmental protection industry in Guangdong province [J]. Modern Urban Research, 2012, 27(7): 81-87. 9]. As an important part of energy-saving and environmental protection industry, the development of energy-saving industry will greatly promote the development of the energy-saving and environmental protection industry in China. The patent system may improve the green technological innovation capability through a continuous cycle process: technological exploitation – protection – utilization – improvement – protection – utilization[10] Liu Fudong, Zhu Xuezhong, Wen Jiachun. Study on the patent system oriented to low-carbon develop [J]. China Soft Science Magazine, 2011, (7): 25-30. 10] By analyzing the patents distribution of the energy-saving industry in China from 2008 to 2013, we could draw the following four conclusions: First, at present, the development of the energy-saving industry in China is not yet mature, with a wavy growth in the number of patents by year; Second, the development of various technologies of the energy-saving industry in China is uneven, mainly concentrated on the field of environmentally air conditioning and heat pump technology. And in technology-specific items, granted patents are more focusing on F24F1/00-F24F1/04; Third, the amount of domestic granted patents is dominant in the overall numerical value, but some core technologies are still controlled by foreign patent powers like Japan, South Korea, America and European Union' patentees; Fourth, key research results of domestic and abroad researches, are basically consistent in the energy-saving industry in China, although the granted patents distributions are various in different technological fields. Acknowledgements This work was financially supported by the National Natural Science Foundation of China (71373221) and the Soft Science Project of State Intellectual Property Office of China (SS13-A-09). References.
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