Introduction. - e2f filter

Size: px

Start display at page:

Download "Introduction. - e2f filter"

Sharlene Jefferson
5 years ago
Views:

1 Introduction - e2f filter

2 Contents 1. What is the e2f filter 2. e2f vs HEPA 3. e2f Pros 4. conclusion

The fine dust in the inner part sticks to the film due to the electrostatic phenomenon on the both sides, therefore it can easily catch the fine dust that is nano-size(less than μm ).

3 1. What is the e2f filter e2f filter (electret film filter) has +, - on their both sides. The air passes in a zigzag through the narrow tunnel of the polymer resin film that has permanent static electricity. The fine dust in the inner part sticks to the film due to the electrostatic phenomenon on the both sides, therefore it can easily catch the fine dust that is nano-size(less than μm ). Almost every floating dust has polarity, so when it goes through e2f filter by a fan forcibly, it is stacked on filter, causing magnetic force between filter's polarity and dust's polarity. Some of none polarity dust will be attached making induced electrostatic while passing through e2f filter. It is the same principle that many dust stick to the computer monitor or TV.

1. What is the e2f filter Effectiveness that can be proven to your

This depends on the time of usage and the environment.

4 1. What is the e2f filter Effectiveness that can be proven to your eyes. The color of e2f filter changes to black. This depends on the time of usage and the environment. In the beginning, the filter s color is white, but it becomes grey as the time passes. After 6 months, the filter's color becomes darker from the exterior to interior of it, because there are a lot of ultra fine dust captured by it.

5 1. What is the e2f filter

Filtration Efficiency corresponds to the numerator of the formula, so it is the bigger, the better. 2. Pressure Drop corresponds to the denominator of the formula, so it is the smaller, the better.

6 2. e2f vs HEPA Filter Quality Factor Generally, there are 2 factors on estimating a filter s quality; 1. Filtration Efficiency, 2. Pressure Drop. As follows is their calculating formula : Q = [ln(p) / ΔP] *** ln(p) = Filtration Efficiency (%), ΔP = Pressure Drop (Pa), Q = Quality Factor 1. Filtration Efficiency corresponds to the numerator of the formula, so it is the bigger, the better. 2. Pressure Drop corresponds to the denominator of the formula, so it is the smaller, the better. That is to say that it can be defined as a good filter lets the air easily go through, and well filters out pollutant in the air. Compare to a HEPA filter which has equal Filtration Efficiency, e2f s Filter Quality Factor number surpasses the counterpart s, since its Pressure Drop is far smaller than HEPA filter. Air Flow Air Flow

7 3. e2f Pros The features of e2f filter compare to HEPA filter are: 1. It is not the method of netting out but of adhering to the filter; therefore, e2f with interception method can filter out tinier dust than HEPA with straining method can do. 2. Since Pressure Drop is far smaller than HEPA, e2f shows good Filtration Efficiency even with a fan that requires less power. Besides, use of less-powered fan drops power consumption, and makes less noise when it works. 3. It may show lower filtration efficiency on higher wind speed, which Interception filtering methods commonly do.

4. conclusion Considering the features 1-3 mentioned above, e2f filter is to be

positioned as a complementing product to medium-large sized air purifiers for

Expected succeeding product that adopts improved method of filtration Also, a

national research & development institute in order to cope with the weakness of

8 4. conclusion Considering the features 1-3 mentioned above, e2f filter is to be deemed suitable for compact and personal air purifiers, and it should be positioned as a complementing product to medium-large sized air purifiers for living room, which use multi-step filtration including HEPA, not as a competitor. Expected succeeding product that adopts improved method of filtration Also, a research for improvement of filtration is being conducted with a university and national research & development institute in order to cope with the weakness of Interception filtering method, and we are planning to begin mass production by the end of 2015.

Visibly clean, Elegantly designed, Convenient Reasonably priced, Air Purifier clair

www.cleanair-clair.com Visibly clean, Elegantly designed, Convenient Reasonably priced, Air Purifier clair clair is different Create healthy air with the innovative technology of clair, the air purifier