From the demand structure of the main fields, it is predicted that the general fan is the most widely used, the most demanded, and the most manufacturers. Overall, the supply of such products exceeds demand. Although the demand for special-purpose fans is not large, due to the special operating environment, it needs to be treated differently because the main material requirements are relatively special. The biggest feature of the Roots blower is that when the pressure is adjusted within the allowable range, the flow rate changes little, the pressure selection range is wide, and it has the characteristics of forced gas transmission. The main disadvantage is that the noise is relatively large. In recent years, through the introduction of technology, joint ventures, and self-development, China has introduced a low-noise three-leaf roots blower, which is quite welcomed by users and has a good market prospect. Turbine compressors are important equipment of major engineering complete sets and play an important role in the national economy. The performance requirements of turbine compressors require both high pressure and large flow.
With the large-scale installation, the parameters of turbine compressors are required to be higher and higher. Such as blast furnace smelting plant, large coal chemical plant, large-scale chemical fertilizer plant, large-scale acetylene plant, large-scale air separation plant, natural gas pipeline conveying plant and oil field gas injection plant. The demand for this type of product accounts for very little of the total amount of fans, but due to its importance, complex structure, long manufacturing cycle, and high technological content, it has relatively good economic and social benefits. The level of turbine compressor manufacturing represents the overall level of the fan industry. At present, the trend of global economic integration is becoming more and more obvious. The economies of various countries will become more interdependent. International economic cooperation and exchanges are getting closer and closer, and international markets are at a stage of substantial crossover and integration. At the same time, the pace of global industrial restructuring is accelerating. Significant progress has been made in the scale and depth of international division of labor. Developed countries continue to shift industrial production to capital-intensive and technology-intensive industries, and labor-intensive products are being transferred to developing countries and regions.
Air-conditioning ventilation fans are mostly used in office buildings, shops, hostels and other buildings, factories, underground streets and other air-conditioning ventilation, exhaust fans, in the form of centrifugal, axial flow, mixed flow and so on. In China, centrifugal multi-leaf fans, ventilators with mufflers, and mixed-flow fans are widely used. Depending on the installation location of the fan and the layout of the pipes, various noise levels can be selected. Form of fan. The static pressure is selected from the low static pressure fan below 2000Pa. To this end, each fan manufacturer will work to improve the efficiency of system products, including single fans and regulators. Specifically, while improving the efficiency of the fan blades and the casing of the fan, the air volume adjustment technology such as the inverter and the adjustable blades can be flexibly used, or the high-efficiency motor can be used to achieve the purpose of energy saving. Furthermore, in consideration of the life and cost of the ventilator, efforts have also been made to consider changes in components, structures, etc. that have a longer life and reduced maintenance, the use of recyclable materials, and changes in the structure that can be easily disassembled.
The relationship between fans and fans: Fans are the abbreviations for gas compression and gas transportation machinery in China. Generally speaking, fans include fans, blowers, compressors, and roots blowers, but do not include volumetric blowers such as piston compressors and compressor. Ventilator is a product type of fan, but people usually call the ventilator simply as a fan, which is another name for a fan. Fans have a long history. China has produced simple wooden Kariya windmills for many years before BC, and its principle of action is basically the same as that of modern centrifugal fans.
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