日前，上海日立的“大规格及变频双气缸旋转式空调压缩机”通过专家组鉴定。该项目填补了我国双气缸空调压缩机的空白，提高了空凋业的整体技术水平，突破了发达国家在相关领域的技术壁垒。其中三项技术已获得国家知识产权局专利授权，另四项专利正在申请之中。上海日立电器有 Recently, Shanghai Hitachi’s “large-size and variable-frequency double-cylinder rotary air-conditioner compressors” was certified by an expert group. This project fills the gap of China’s two-cylinder air-conditioning compressor, improves the overall technical level of air-conditioning, and breaks through the technical barriers of developed countries in related fields. Three of these technologies have been granted patents by the State Intellectual Property Office and the other four are pending. Shanghai Hitachi has