ozone generator - where can i buy an air purifier

Some time last year, my car air conditioning unit began to smell, which is a sign that the mold has been formed on the evaporator.
Unfortunately this part is hard to reach, so cleaning the evaporator coil is a big problem.
I looked at a set of commercial climate control cleaning products and found that most of them were useless: 1)
Two different disinfectants in the spray tank sold as a climate control unit cleaner: The spray tank is easy to use because you just put them in the car and have them spray their contents while ventilation is running.
Unfortunately, the smell came back two days after they applied.
I think spray is a combination of perfumes (
They left a very strong lemon.
Like the smell in the car)
I am a mild disinfectant such as ethanol.
If the mold reaches the evaporator, the latter is not good for the mold. 2)
A spray tank with a long tube that can spray disinfectant and detergent directly onto the evaporator.
This is actually a very good system and most workshops like it due to simple and easy to use applications.
It actually removes organic matter from the evaporator and usually protects it with good fungicides.
However, you have to be able to reach the evaporator with a tube, which is not possible in my case.
To make it easy, it will mean a lot of extra work.
In addition, the ventilation shaft will not be cleaned by this method.
While talking to a mechanic, I found that some workshops use ozone generators to carry out deodorant on such cars.
They also use it to remove the smell of cigarettes or other unpleasant smells.
Due to its gas state, short life and excellent reactivity, ozone can reach the radiator and react with the mold (killing it)
It disappeared in a few hours.
Since professional ozone generators and cleaning services are very expensive, I decided to build a simple ozone generator with cheap available parts.
So if you have a room with a bad smell, a car or a van, just make your own ozone generator.
1st: In this instruction, you will use the dangerous voltage (
Up to 110/220 volts of several thousand volts)
Ozone that produces harmful substances.
Make sure that the ground fault circuit breaker is always used when building, testing and using the device.
In addition, make sure all metal cases are properly grounded.
If you are not sure, I strongly recommend that you use a portable GFCI plug like this to protect yourself from harm.
2nd: ozone is a very positive substance that stimulates and damages the eye, throat and respiratory system at an already very low concentration of 1 ppm (0. 0001 Vol-% or 2 mg/m³).
Fortunately, there is a very typical smell of this substance, and the threshold for human odor is below 0. 1 ppm.
This means that you will smell the gas well before it reaches the hazardous concentration.
Never run a generator in a closed space with live animals (
Including yourself, your pet . . . . . . )
Ventilate the room for a few hours before entering the room again.
Most of you may know ozone mainly from the so-called ozone layer, which is a layer that naturally exists in our atmosphere to protect life on Earth from ultraviolet radiation.
Ozone is a molecule made entirely of oxygen atoms.
But compared to our "breathable air" oxygen (
Consisting of two oxygen atoms)
Ozone consists of three.
Chemists refer to this difference in atomic structure as isosex.
While the difference sounds trivial at first, ozone molecules are more active than our "standard" air oxygen.
In addition, ozone is substeady state, which means that it is strongly inclined to disintegrate according to the following equation: 203 → 3o2 Δhf0 =-
286 kJTo give you an idea of this value: Decomposition of 2 mol 03 (96 g of ozone)alone (
Does not include the heat generated by the reaction of ozone with other substances)
Enough energy to heat 1 kg of the water from 10 °c to 80 °c.
As described in step 2, ozone is not a very stable substance and can be broken down into oxygen without any other partner.
Therefore, ozone cannot survive for a long time in environmental conditions and cannot be stored without major obstacles.
To use it, it must be generated on the spot.
There are three main sources for ozone: 1st)
In our upper atmosphere, ozone is formed by radiating oxygen with energetic ultraviolet rays.
High energy radiation will O-
O bond, forming two oxygen free radicals that react with other oxygen molecules to generate ozone.
You can find a lot of details on this on Wikipedia.
You can purchase an ultraviolet ozone generator mainly used for disinfection of water (e. g. here)
But for the purposes of our deodorant, the amount of ozone is usually too small. 2nd)
In the presence of nitrogen oxides and volatile hydrocarbons, ozone can be accumulated in a lower atmosphere, I . E (
Contrast with ozone in the upper body)
Harmful to humans, animals and plants.
This phenomenon is often called "summer smog ". NO2 (
E can be formed. g.
In the internal combustion engine, the combustion heating system ,. . . )
It is decomposed into NO and ozone by ultraviolet rays.
However, in the presence of hydrocarbons, the process is basically completely reversible (e. g.
Fuel only partially burned)
NO is converted to n2 again. R-
CH3 2 O2 2 NO → R-
Emissions of CHO 2 no2h2o hydrocarbons and no2h2o using better internal combustion engines and exhaust catalysts (
The smog of summer also follows)
Greatly reduced. 3rd)
Electricity: Do you know the smell when an old laser printer is operated?
Near the Arc or near where lightning strikes during a storm, you will get the same result.
High pressure is used to ionize air, which is common to everyone.
A large amount of ozone can be produced in this process.
In fact, most ozone generators do not use electronic arks (
Because these are not easy to handle, resulting in rapid degradation of materials)
But the Corona discharge
Again, you can read a lot about these e. g. on Wikipedia.
There are some very impressive electric ozone generators.
I decided to buy these because they were cheap (
About $30, even less if you buy it from China)
, Easy to handle and produce amazing amounts of ozone ~ 10g/hour.
This doesn't sound very much at the beginning, but keep in mind that the rate of de-odor of car deodorant is 0.
5 g/h is enough, the goal of professional room cleaning generator is 5 to 10 g/h.
As you can see in the picture, the layout is very simple: the ozone generator panel is placed in a metal box with some powerful fans (
On the back panel)
Cool the whole system and deliver the generated ozone to the outside of the box.
Control the entire system using a relay board and an Arduino Uno board. Two 5-
The position rotation switch is used to set the required power level and run time.
To save some DIO pins on the Arduino, we will use a resistor network and analog input to read the switch position.
The start button is used to start the generator (duh)
Some LEDs indicate which panel is currently running and whether the fan is on.
You can choose to have a strong start using the Enhance button (
Two generators run continuously for 10 minutes)
After that, the formation of ozone is relatively small.
This may be useful. g.
For the car you want to fill the room with ozone in the first place and keep it low after a few hours.
The generator uses 220 v ac for the ozone generator panel and provides 12 DC converters for Arduino Uno controllers and fans.
Later, you will find a more detailed electrical layout in structure.
There are three important points to consider in the layout: 1st)
The fan needs to be strong enough to cool the ozone generator and deliver new oxygen to the generator panel.
I used two 80mm 12 v fans on the server.
In addition, the 12 v power supply must be good enough to power the fan, Arduino, and relay. 2nd)High voltage (
Thousands of volts for ozone generators)
This means that voltage flashes may occur.
Keep the cable at least 5 cm off the panel if you are using a metal case (
I used one for fire safety reasons)
Be sure to ground each part correctly. 3rd)
High-voltage generators produce some electrical noise that is harmful to small electrical components.
Make sure the Arduino and relay boards are away from the generator.
I also found it helpful to put the air conditioner in.
The DC transformer between these systems is (grounded)
The metal housing of the transformer acts as a barrier.
I drill the opening of the button, power cord, air inlet, LEDs and fan socket into the front of the metal with metal holesws-and backplane.
I found it very helpful to place the Metal backplates between two pieces of wood to prevent them from bending and to position the drill bit using the print output I designed.
I have attached the image of the final layout as a guide.
You can find the electrical layout in the second picture.
The Arduino code for the control system is given below.
I tested this generator two months ago, put it in the passenger cell of my car and guided the power cord through the open window (
Sealing with tape)
And put the air conditioner on.
If you have a filter based on activated carbon in your ventilation system, you have to remove it temporarily because otherwise it will capture most of the ozone generated.
When the generator is running at the lowest setting, after letting the air cycle for 120 minutes, I turn on the generator (
Timer can also be set)
Open all the doors and let the air flow in the passenger's cell.
After 4 hours, the smell of ozone disappeared and the whole car smelled as good as the new one.
The smell of mildew has not come back until now.
So give this method a shot if you have the same problem.