Wei, a central air conditioning environment electrostatic purification technology mainly flat electrical wire and honeycomb-type forms. 1) flat electrical wire technique is to form a strong electrostatic field use electrical wire, so that the dust in the first stage of the wire under high energy from the electric field ionization (operating voltage greater than 8000V), the second phase of the charged particles are adsorbed in an electrostatic precipitator board (operating voltage greater than 4000V). Silk long time tablet applications Electrostatic Precipitator technology, mature technology, air handling field at home and abroad widely used. 2) The honeycomb-type air purification equipment is the use of honeycomb structured light hydrogen ion air purifier working in each hive intermediate unit uses a needle stick tip discharge, the discharge uniform light hydrogen ion air purifier, high-voltage strength, dust collection efficiency higher, they can completely kill the bacteria, in order to achieve efficient dust removal, sterilization function. Honeycomb-type air purification technology equipment matures, domestic air purification is also more widely used. Wei, a central air-purifying efficacy testing a) anion concentration: 30cm export at 200,000 / cm3; air anion concentration tester. b) air-conditioning outlet respirable particulate matter PM10: ≤ 0.08mg / m3; laser dust tester. c) the total number of bacteria ≤ 500 cfu / m3; total plate exposure sedimentation d) fungi ≤ 500 cfu / m3; plate exposure sedimentation e) β- hemolytic streptococcus and other pathogenic microorganisms may not be detected; blood nutrient agar culture Assay f) increase the amount of ozone ≤ 0.10 mg / m3; portable ozone detector. 7. purification device maintenance a) Safety static power, does not affect the normal operation of air conditioning and other equipment; b) cleaning, maintenance: the time when you need to clean hydrogen ion air purifiers offer, first turn off the power, remove the cleaner separately module, direct wash water after cleaning, dry 15 to 30 minutes of light hydrogen ion air purifier price, loaded back into place, the first open fan for 10 minutes, then turn the air purifier. c) cleaning intervals depending on the environment and other factors, usually 1-2 months.