Central air conditioning, air-purifying technology used broadly divided into the following central air purification devices, they have their own strengths, and with advances in technology continue to improve. 3. UV lamp UV antivirus technology is the use of UV lamps emit UV-C to kill bacteria, viruses and other microorganisms, or loss of activity, can be used for air, water and surface disinfection. Its economy is high, it has been widely used in water treatment, food and beverage, wine, and other fields, as well as hospitals and other places. However, the use of UV technology in the AHU, because the air flow rate is too high (usually 2-3 m3 / s) can not achieve the desired effect of central air purification device purifying principle, and tube surface and can easily be covered with dust useless. Therefore, within the larger dust subway cars UV lamp technology is not applicable. Wei, a VBK-G-duct air purification device today we will stop here, there will be follow-up after another supplement, please continue to care a great environment! Central air conditioning, air-purifying technology used broadly divided into the following categories, they have their own strengths, and with advances in technology continue to improve. 5. Electrostatic purifier advantages: high voltage electrostatic precipitator tungsten continuous release static electricity, so with the air in the dust and bacteria are put positive charge, then the negative electrode plate adsorption. You can filter smaller than cell dust, smoke. Comprehensive respiratory protection, and greatly reduce the risk of cancer. Easy to use, two weeks after use, it can clean dust, reduce secondary pollution. Do not replace the high cost of supplies central air purification device Which is good, and can electrostatic sterilized. Electrostatic tungsten release of High Voltage Electrostatic central air purification system price, and instantly kill bacteria, viruses, to eliminate colds and prevention of infectious diseases more effective. Disadvantages: If ozone release control is not good, easy to harm the human body. In addition, the electrode plates require periodic manual cleaning. To sum up, taking into account the subway car by ventilation standards, air volume inside the car can not be less than 8000 m3 / h, fresh air is not less than 2600 m3 / hour; in terms of purification efficiency or system maintenance, electrostatic dust Technology has a very clear technical advantages, but also from the economic performance analysis, also has obvious advantages. It will make use of the air conditioning system greatly reduces energy loss itself, is very suitable for a large amount of dust, air-conditioned subway car air purifiers and dust.