1. Daikin Since 1924, Daikin has been focusing on research and development; D and air conditioning production. It is one of the largest air conditioner manufacturers and suppliers in Japan. Products cover civil and commercial fields, and are a collection of R&; D, production, sales as one of the comprehensive air conditioning large enterprise group. DC frequency conversion technology, using Daikin high-pressure cavity scroll compressor, has the advantages of leading technology, energy saving, high efficiency, higher comfort and high unit stability. The outdoor unit and compressor have dual standby operation functions. 2. Hitachi Hitachi Central Air Conditioning is a very popular air conditioning brand. The company's air conditioning system takes scientific and technological progress and technological leadership as its own responsibility, and constantly innovates to adapt to the ever-changing changes in society. Hitachi inverter air conditioner is also an award-winning air conditioner brand. But also because of its efficient technology and quality. 3. Toshiba Toshiba Company was established in 1875, adopting DC frequency conversion technology, which can realize rapid cooling and heating, accurately control temperature and provide comfortable space. Toshiba air conditioner won the 17 energy-saving award from 1994, and won the energy-saving award for nine consecutive years from 1999. Toshiba super intelligent DC variable speed air conditioner won the energy saving award in 2004, becoming the only air conditioner with export license. Visible brand strength is still very strong. 4. mitsubishi electric mitsubishi electric Group is a leading scientific and technological enterprise in the world, providing diversified services for buildings, factories and families, including air conditioning, refrigeration and heating systems, power equipment, public facilities and enterprise visual energy-saving systems. As the core component of the four parts of air conditioning, the quality of compressor directly determines the quality of air conditioning. Mitsubishi electric compressor is an imported compressor with low-pressure cavity scroll compressor, and its market share is as good as Daikin's. 5. Mitsubishi Heavy Industries Mitsubishi Heavy Industries Central Air Conditioning is also a good brand and has a good reputation in the world. Relying on unique technology, environmental protection and energy saving, comfortable static pressure, showing comprehensive advantages. At the same time, the consumption of refrigerant is less, and the energy efficiency ratio is higher, which improves the overall performance of the air machine, saves energy and reduces emissions. It has a history of 100 years and is an excellent brand. 6. It is agreed that after years of efforts, Gree Central Air Conditioning has become a first-line brand. As a set r &；; D. Gree, as a state-owned household appliance enterprise integrating production, sales and service, has nearly 2,000 technical patents, and a series of high-end products such as centrifugal large-scale central air conditioner and sine wave DC inverter air conditioner independently researched and developed have filled the domestic gap, broken the technological monopoly of refrigeration giants in the United States and Japan, become a model created from China to China, and won wide popularity and influence on the international stage. 7. Although Midea's air conditioner doesn't really need only one degree of electricity a night, since it dares to play this slogan, it shows that Midea's central air conditioner has excellent energy-saving effect. Of course, as a home appliance brand, the product quality of Midea's central air conditioner can also reassure everyone. 8.York York not only has a profound brand culture, but also pursues a more refined, high-grade and scientific brand to meet people's comfortable life. It is the most familiar brand of water system for consumers at present. 9. Matsushita Electric Co., Ltd. is a famous Japanese electronic product manufacturer and a multinational company, with hundreds of companies and more than 300,000 employees all over the world. Involved in household appliances, digital audio-visual electronics, office products and many other fields, world-renowned. We also constantly introduce diversified products, which can create a comfortable living environment and improve the quality of life. 10. Haier group Haier central air conditioning is a China brand that entered the field of central air conditioning earlier. It is the first brand in China that pays attention to the overall space and healthy air. Subdivide air conditioning functions for different scenes such as living room, bedroom and kitchen, and match different product solutions. Its self-cleaning technology and PM2.5 purification module are well received by home improvement companies and consumers, and its products have passed the quality certification of Europe, America, Saudi Arabia and other countries and exported to 162 countries and regions around the world.