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6/13/2017 8:19 pm  #1

Chinanitrogengenerator indoor airborne particulates is increasing

Here again need to emphasize the physical meaning of CADR. CADR can have both positive and negative understanding: 1. From the front, to provide clean air point of view, with a  value of the air purifier, equivalent to an equal amount of absolute clean air, used to dilute indoor pollutants Of the air inlet. 2. From the point of view of the removal of indoor contaminants, an air purifier with a CADR value is equivalent to a suction port that absorbs all the contaminants in the air. The following calculations use the second physical meaning of CADR.

After recognizing these pathways, it can be learned that the rate of change of the concentration of indoor airborne particles at any time is the dynamic equilibrium of the five paths. If the pollution is faster, the concentration will rise, if the speed of purification faster, the concentration will be reduced. In other words, the rate of pollution minus the rate of purification is the rate of change in the concentration of indoor airborne particulates at this moment. If it is positive, it means that the concentration of indoor airborne particulates is increasing, the indoor air quality is deteriorating, and the indoor air The quality is getting better.

For a fixed room, if the external conditions do not change, then the room will form a dynamic balance, that is, the speed of purification and pollution rate is flat, the unit time into the system of particulate matter and discharge system particles equal, then the indoor air The quality does not change, that is, the rate of change is zero, that is, the sum of the sum of the rates of the two routes of pollution in the above five  is equal to the sum of the rates of the three purification paths.


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