Two indicators to detect air filtration equipment holistic approach to detect air filter efficiency and leakage coefficient is mainly compressor price, the sum of these two indicators for individual equipment is 100%, while overall for the detection filter of method is relatively complex. Brief detection method, these methods are from the actual operation of the results obtained with the implementation of the standards are not contradictory, but because the evaluation is based on the average of the air compressor, so do not include error and confidence range calculations, statistical characteristics of the particles can be also taken into account. In accordance with the relevant provisions for evaluating the efficiency of the installed filter method Cottle air compressor, only to calculate the average value of the parameters, you can also use the concept of statistics, the standard deviation and 96% confidence range, but some experts believe that such methods are not much meaning since the whole method is based on the actual assumptions can not be completed. 1, the first assumption for air filter inlet particle concentration in the entire surface area of ??the terminal is not changed, so how to detect? The answer is unable to detect outliers concentration can reach 1/10 or even several times. 2. The second assumption is that the outlet of the filter is assumed to be constant wind speed compressor Qin Wei, but the reality of the wind speed is not possible to maintain such a state, but allows the generation within ± 20% of the average value some changes. 3. The third assumption is based on scanning speed, which is also require constant, but when the actual work of the hands of people can not maintain strict uniform motion, would have a slight jitter and pauses. So, over this series of assumptions and the actual situation is very far, a variety of factors that are very random appearance of reality, that these assumptions to avoid reality, clearly beyond these methods 96% confidence limits of the range should be considered. Cottle compressor works brief single-stage compression screw compressor are parallel to each other by a pair of yin and yang rotor teeth together (or screw) rotates in the cylinder, the air between the rotor slots continue to produce cyclical changes in the volume of air is transported along the rotor axis from the suction side to the output side, to achieve screw air compressor intake, compression and exhaust the whole process. Air compressor inlet and outlet are on opposite sides of the housing of the female rotor and the male rotor grooves teeth are driven to rotate the main motor. Directly driven by the electric motor of the compressor, so that the crankshaft rotational motion of the piston rod driven reciprocating motion, causing the cylinder volume change. Due to changes in pressure within the cylinder by the air intake valve through the air filter (*) into the cylinder during the compression stroke, since the cylinder volume is reduced, the role of compressed air through the exhaust valve, through the exhaust pipe, a single the valve (check valve) into the tank, when the discharge pressure reaches the rated pressure 0.7MPa controlled by a pressure switch and automatic shutdown. When the tank pressure dropped 0.5--0.6MPa pressure switch automatically joins start. _ _ Air compressor air compressor compressor developed three decades of history provided by Xianyang Qin Wei Qin Wei Air Compressor Co., Ltd.. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) strong, credible, Xianyang in Shaanxi compression, separation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qin Wei Air and you hand into the brilliant, for a better future!