Dezhou Longda Air Conditioning Equipment Co., Ltd. was established in 2014 and is located in Shuangchuang Industrial Park, Luquantun Town, Dezhou City, Shandong Province. It mainly produces central air-conditioning terminal series products and fire-fighting ventilation series products. It has won gold medals and silver medals at the International Fluid Machinery Exhibition. Award, it is a member unit of China General Machinery Industry Association and a member unit of Wucheng Central Air Conditioning Industry Alliance. It has won the honorary titles of Dezhou City’s Contract-abiding and Trustworthy Enterprise, Municipal "Demonstration Enterprise", "Advanced Unit" and other honorary titles. In 2017 and 2018, tax revenue increased by more than 60% for two consecutive years. From January to June this year, tax revenue increased by 106% compared with last year. The company has strong technical force, advanced production technology, complete testing equipment, perfect management system, and reliable product quality. It has a national performance testing laboratory and has obtained six national patents. The appearance design patent of the forward multi-wing centrifugal impeller and the appearance of the fire exhaust fan Design patents, low-noise air-conditioning fan appearance design patents, fire-fighting exhaust and fire valve shrapnel appearance design patents, new centrifugal fire-fighting exhaust fan utility model patents, low-noise air-conditioning fan utility model patents, currently being jointly developed and applied with Xi’an Technological University10 New inventions and patents for use: a patent for a fire valve body with double-sided blades, a patent for an axial fan rain cover, a patent for a noise reduction exhaust fan, a patent for a smoke exhaust fan, a patent for the panel structure of a frameless fan box , The column structure patent of the frameless air box, the plug-in structure patent for valve body assembly, the patent of manual air volume control valve, the patent of centrifugal exhaust fan, the patent of closed structure used for air volume control valve; the establishment of the company is based on quality, With efficiency and innovation as the core corporate spirit, we focus on leading the industry to achieve high-quality development. It was the first to pass ISO9001 quality system certification, ISO14001 environmental system certification, OHSAS18001 occupational health and safety management system certification, and passed the CRAA certification of China’s refrigeration and air-conditioning industry, the certification of the Fire Product Conformity Assessment Center of the Ministry of Emergency Management, and obtained the fire product certification.