1892 France developed into a cross-flow fan; in 1898, the Irish people to design the forward blade centrifugal fan Xi Luoke wet curtain fan culture, and is widely used for various countries; the 19th century, has been used in mine ventilation axial fans and metallurgical industry The blast, but the pressure is only 100 to 300 Pa, only 15 to 25 percent efficiency farming fans, until the twentieth century, 40 years after it has been rapid development. Fan is a high energy-consuming equipment, power consumption of resources in the stone processing of a large proportion of FRP fan culture, with the current growing shortage of energy and productive and efficient face application, saving energy has become a stone issues of common concern to producers, many stone production enterprises to reduce power consumption of the fan as the current important work. Reduce fan power consumption in addition to improving the efficiency of the fan itself, but a reasonable selection of fan adjustment method is the most important, because the load of stone production process and with the ever-changing needs of the majority of fans will need to constantly adjust the flow host load . Livestock farming fan | Binzhou farming fans | Minhua Qingzhou Qingzhou temperature control equipment supplied by Chinese citizens thermostat plant. Temperature Control Equipment Factory Qingzhou public Hua (www.minhuawenkong.com) strong, credible, Shandong Weifang fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead China and China Qingzhou temperature control equipment and you hand into the brilliant, for a better future!