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What is ozone?
Ozone is allotrope of oxygen and composed of 3 oxygen atoms. It is in a form of vapor in normal temperature, colorless in low density, and blue in density of over 15%. In 0.015ppm density of ozone, its particular odor can be felt, and its oxidation is 2.07V, which is second highest to fluorine. By using this oxidation power, we can oxidize organic and inorganic substances.
Ozone is colorless vapor always exists in a small amount(normally 0.01~0.03ppm) in the air, and not a special gas. Chemically one substance ozone become particle with strong oxidation by attaching one oxygen atom to one oxygen molecule. Ozone has specific odor, and most people can smell it when it is over 0.015ppm. Very low density(0.02~0.05ppm) ozone and anion get formed when naturally high voltage is discharged or plants in beach or deep forest, is doing photosynthesis. Through these phenomena, ozone created in beach or deep forest, let us feel the freshness. Like so, natural phenomenon proves that earth can purify air with ozone and anion. Oxygen in air repeats to become ozone and disappear by the UV light radiation of sunlight in outer space of atmosphere.
- Molecular Equation : O3 - Density : 2.14kg/m (OC. 1atm)
- Molecular Weight : 48 - Melting point : -192.7±2℃(at 760mmHg)
- Fusion rate : 0.57 g/l (20℃) - Boiling point : -111.9℃(760mmHg)
 
Generation of Ozone
 
History of Ozone
- In 1840, German scientist, Christian Schonbein first found ozone, and named it from the Greek letter "ozein", which means "smell".
- In 1845, French men De la Rive and Marignac acquired ozone from electrical explosion of pure oxygen.
- In 1848, Hunt found out ozone is not a new substance but is reformation of oxygen.
- Ozone related technology was developed rapidly after Siemens of Germany developed ozone generating tube in 1857, and this tube is the beginning of electric discharging ozone generator we are using now, and manufacturing model.
- In 1893, world's first ozone sterilization drinking water facility was established(NETHERLANDS)
- In 1906, world's first ozone treated water purification facility was established in France(NICE)
- In 1992, it is used in water purification facilities in Tokyo, Okinawa, Osaka, etc.
- In 1995, 75% of American water treatment facilities were using ozone treatment facility. Ozone became substance that would replace the chlorine with its strong sterilization and oxidation. It is applied in many different fields industrially, and studied actively.
 
Function of Ozone
Strong oxidizing substance, ozone was used first in Nice, France at the end of 19th Century for sterilizing drinking water. Ozone's oxidation and sterilization is 6 times larger than chlorine's that are used for sterilizing drinking water. It kills germ, bacteria, virus, fungus 99.99% in 10 seconds. It is 3,150 times faster in sterilization of coli, compared to chlorine. Therefore, leading countries already used this ozone sterilization method in drinking water purification facility. Ozone eliminates the odor by combining with odorizing molecules, and resolves toxic chemicals perfectly with unbelievable oxidation. And, ozone goes back to purest oxygen after doing its job.
 
Ozone that protects life
90% of ozone in earth is concentrated in ozone layer in stratosphere, which is about 10~50km above the ground. This ozone layer absorbs 95~99% of bad UV ray from sun light to protect life of animals, plants and human in this earth. This is one of the phenomena that nature has shown us. Without this ozone layer, powerful UV light reaches the ground, and human, animals and plants will get skin cancer, and destroy the ecosystem.
 
 
Structure of atmosphere is divided into troposphere, stratosphere, middlebrow, heat layer, and outer space by the distribution of vertical temperature. Troposphere is located at about 10~15km from ground. As it goes higher, average of 6.5℃ per 1,000m decreases. And with that, atmosphere becomes unstable, and convection current is activated. Upto 50km from upper part of troposphere, temperature keeps on getting higher to 0℃. And in this layer, vapor moves with molecular expansion, because of low pressure, and forms stratosphere. In this stratosphere, oxygen molecule is dissolved into two oxygen molecules by strong UV light from sun light, and oxygen atom is combined to oxygen molecule to create ozone. Ozone is located at 25km from ground with most density, and we call this layer ozone layer.
 
Effect of Ozone(Ozone, is it bad for human body?)
We often hear "ozone warning, ozone alarm". This happens when ozone density in the big cities are too high. This makes us feel that ozone is not a good thing. Actually, ozone occurs chemical reaction with active and strong oxidation, and irritates eye, lung and respiratory organ. But, does ozone give our body only bad effect? Is ozone just another polluted substance?

Ozone is not a substance that has only bad effect on human. Ozone that is warned in city through ozone warning, is created by chemical reaction of strong UV sun light with many bad polluted substances like carbon hydrogen and nitrogen dioxide. In this case, since there are a lot of exhausted gas and oxygen atom containing pollution, ozone is created from it. Actually, in a time like this, it is more important to notice that there are so much other polluted substances, which cause the creation of ozone. It should be known that these bad substances can create much more damage than ozone. Actually, other substances have worse effect on respiratory organ than ozone. Ozone resolves these bad substances, and goes back to oxygen. We can see that since ozone warning only continues for a very short period of time.

We can know the fact that ozone should not be considered as polluted substance through the fact that high density ozone occurs naturally. For example, according to the statement of Ministry of environment in 1997, ozone density in pure area, Taehwadong, Ulreungdo was much higher than it was in big cities like Seoul or Busan many times. This area is far away from port with toxic gas, and does not even have a road. High density ozone was created naturally when clean oxygen from forest received strong UV ray. This naturally created ozone has little damage to body, compared to ozone created in big city. Also, ozone exists in ozone layer travels down to low atmosphere, and sterilizes and purifies. When thunder strikes, ozone gets created. We can feel this in clean air after raining. This ozone is absorbed by soil with nitrogen. This is why rain helps crops grow better than sprayed water. Like this, ozone is created naturally and purifies the nature of the earth.

Besides, ozone has been known to help the body. Already at the end of 19th Century, it was used as ozone gas and liquid ozone. In a leading countries like Europe and U.S., ozone and oxygen are used to develop treatment technology. It is because ozone and oxygen provide oxygen into cell of human body to increase the resistance to diseases. It is also used in steam sauna, pool and spa. It is even used for treatment of cancer or AIDS patients.

Like so, ozone is a substance that can help us in many different ways. So far, we know that ozone irritates eyes, lung and respiratory organ, but unless ozone is directly sprayed into eyes or respiratory organ for a long time in a closed space, there is no problem. That is because ozone is very active and unstable, and it goes back to oxygen very quickly. Instead, it resolves polluted substances and resolves oxygen in carbon dioxide for fresh air. Thus, ozone is a very good substance to apply natural purification function of the earth, when used well.
 
Ozone & Curo
Troposphere, within 10km from ground, rest 10% of ozone exists. Since ozone has strong oxidation, when appropriate amount exists, it is used well for us with sterilization and deodorization effects. But, when ozone density is over the standard, it can harm the body.
Therefore, SmartAir-Curo is designed for less than 0.048ppm for deodoriazation mode(ozone density national atmosphere environment standard: 1hour-0.1ppm, 8hours-0.06ppm) and for self-sterilization for sterilization mode. There is also human body detecting IR sensor for safety of users.