Hitachi central air conditioners are really strong. A few words about how powerful are Hitachi compressors. I saw many articles about Hitachi compressors, various parameters and terminology, and simply summarized the following points
Compressor 1. Hitachi is the world's largest manufacturer of scroll compressors. There has been an embarrassing situation where high-end models of major domestic brands use Hitachi compressors. Later, China began to develop independent core components, and gradually began to have alternatives. 2. The third-generation scroll compressor invented in 1983, the patent technology has been maintained for 20 years. After the patent protection expired in 2003, domestic compressors began to appear. But at this time Hitachi has applied for a new generation of patented technology-compressor internal oil separation technology, patent protection is still 20 years. At present, Hitachi's scroll compressors are produced by Japan's Shimizu, Taiwan's Hitachi, and Guangzhou Hitachi's scroll compressors (without oil separation) are supplied to other domestic air-conditioning manufacturers. Hitachi's central air conditioner is using a high-pressure chamber scroll compressor. The cooling and heating efficiency is higher, so it is only 90 seconds to start quickly. 3. In 2008, Hitachi applied large-capacity scroll compressors to the new commercial central air-conditioning series, which greatly improved energy efficiency and increased stability and reliability. 4. In 2014, Hitachi's mid-end household multi-connector also began to use dual-rotor compressors produced by Shanghai Hitachi to reduce costs. Frequency converter and control technology Hitachi is one of the largest motor manufacturers in Japan. Hitachi and Intel are listed as the world's two major manufacturers of industrial control chip brands, and the control system is also at the top level. All Shinkansen in Japan use Hitachi frequency converters, motors and control technology.
