A blower , also known as a ventilator, is a type of blower that uses a rotating impeller. Modern blowers are electric motors that convert electrical energy into air kinetic energy. A blower is mainly composed of six parts: motor, air filter, blower body, air chamber, base (also oil tank), and oil drip nozzle. The blower operates eccentrically with the rotor offset in the cylinder, and the volume changes between the blades in the rotor slot to inhale, compress, and spit out air. During operation, the pressure difference of the blower is used to automatically send lubrication to the oil drip nozzle and drip into the cylinder to reduce friction and noise, while keeping the gas in the cylinder from flowing back. This type of blower is also called a sliding vane blower.

       Fans, blowpipes and leather bags. The earliest instruments used for forced blowing were fans and blowpipes. Ancient Egyptian goldsmiths used blowpipes with ceramic nozzles, and the Incas sometimes used 8 to 12 copper pipes to blow at the same time. Later, a leather bag made of animal skin was invented. The two ends of the bag were equipped with air ducts and air inlets controlled by the operator. This simple blower is still used in some areas in modern times. The murals of the tomb of Rekhmir (about 1450 BC) in the 18th Dynasty of Egypt have painted images of a can-shaped foot-operated blower. When the air is introduced, the operator pulls up the leather bag with a rope, then steps on it to blow the air into the furnace. Each furnace is equipped with four blowers, and two people operate them facing each other.

      During the reign of Emperor Guangwu of the Eastern Han Dynasty, Liu Xiu paid attention to "selecting good officials". In the seventh year of Jianwu (31), Du Shi was appointed as the prefect of Nanyang. He advocated frugality, promoting benefits and eliminating harm, and governing the country in a fair and clean manner. During his tenure as prefect of Nanyang, Du Shi paid attention to saving people's labor. In order to improve metallurgical technology, he invented the water row (a kind of hydraulic blower).

        The water pump uses a hydraulic mechanical wheel shaft to drive the blast bag, which makes the blast bag expand and contract continuously to add oxygen to the metallurgical blast furnace. This device uses less effort and achieves more results. It is a major reform in the history of my country's metallurgy. Chuanji in the Three Kingdoms period improved and promoted it, and its effect was tripled.

        Du Shi invented the water-powered pump, which changed the traditional Chinese smelting blast device that relied on human and animal power. It not only greatly improved labor efficiency, but also was 1,100 years earlier than Europe, and was a milestone in the history of the development of ancient Chinese smelting technology.

       Du Shi also attached great importance to agricultural production, repaired ponds, expanded land, and made the people in the county rich and prosperous. At that time, people compared Du Shi with Zhao Xinjun, the official of Nanyang in the Western Han Dynasty. It was widely said among the people: "There was Zhao's father before and Du's mother after."

        Shenzhen Huaxinrong Plastic Electronics Co., Ltd. (a subsidiary of Dongweifeng) was established in 2008. It mainly produces and develops a series of products such as AC and DC cooling fans and DC motors. In today's rapidly changing modern technology, all colleagues of Dongweifeng will continue to dedicate high-quality products and services to our customers, and strive to become an indispensable partner for every customer to achieve success.

        Shenzhen Dongweifeng Electronic Technology Co., Ltd. was established in 1991. It is a national high-tech enterprise. It has now developed into a professional supplier of cooling solutions and products for computers, electronics, etc. The company has successfully passed ISO9001:2000 quality system certification, ISO14001:2004 environmental system certification and UL. TUV. CE product certification. As a national key high-tech enterprise focusing on R&D, manufacturing and sales, it has formed three pillar industries: computer electronic radiators, cooling fans; LED lighting, outdoor landscape lighting engineering lighting; and architectural decorative panels.