06-09-2012, 11:40 AM
AIR IONIZER
AIR IONIZER.pptx (Size: 433.82 KB / Downloads: 38)
INTRODUCTION
An air ionizer is a device used to purify air inside an enclosed premise through the process of air ionization.
Here, a high negative voltage generator circuit is used to kick of electrons from a needle point conductor in the form of ions into the air.
As these ions are negatively charged, once out in the air, they start hunting for dust particles and other pollutants. These pollutant particles being positively charged, instantly get attracted (opposites charges attract) until they become too heavy to carry on and just fall of on the ground.
BASIC OPERATION
The circuit is basically a standard Cockcroft-Walton Ladder Network. According to this configuration the input mains voltage is gradually stepped up to a staggering minus 10 kV, using a network of many diodes and capacitors resembling a “ladder” and hence the name.
Here, during each cycle of the input AC, the charge is shuffled back and forth across each row of capacitors, but always maintaining a forward direction in the network, due to effect of the rectifier diodes.
Once all the capacitors reach their full charge, the voltage across each of them (theoretically) becomes equal to the peak AC input mains voltage and the multiplied value of all the capacitors results to the required high voltage.
Cockcroft–Walton generator
This Cockcroft Walton voltage multiplier was part of one of the early particle accelerators responsible for development of the atomic bomb . Built in 1937 by Philips of Eindhoven it is now in theNationalScienceMuseum in London ,England
was named after the two men who in 1932 used this circuit design to power their particle accelerator, performing the first artificial nuclear disintegration in history
BUILDING OF OUR UNIT
There’s nothing complicated about the design and requires just fixing the procured components over the general PCB according to the circuit diagram. Remember, a single wrong connection will stop the circuit from operating, so, do it slowly but surely..
Now connect the circuit to AC Mains (Read Caution Message), the neon light should come ON, indicating that the presence of the mains supply voltage.
If everything’s done as explained, you should start hearing a mild hissing sound at the tip of the needle output. Take your finger near the tip (it’s safe), and literally you will feel a gush of cool fresh air. A typical smell (marshy) can also be experienced near it, due to the emission of ozone.
Advantages
The ions immediately start floating in the air. Since they are negatively charged, any neutral particle like dust or smoke in the surrounding air immediately get attached to them. The pollutant particles get accumulated over these ions until it becomes too heavy for the ions to hold any more of them and they start dropping on the floor. In this way the air around the air ionizer, purifier circuit is kept clean and free from all pollution.
Some ions also happen to collide with O2 molecule and break them into two single atoms of oxygen (O). These single atoms of oxygen further go on to collide and combine with other O2 molecules to become O3, that’s ozone, a useful gas capable of killing bacteria and viruses in the atmosphere. Thus, the circuit is also capable of producing useful ozone (in small quantities – That’s Important), keeping the atmosphere free from germs and diseases.