Making a Negative Ionizer

What is a Negative Ionizer? Air Purification and Ionization Technology

A negative ionizer, also known as an air ionizer or ion generator, is a device designed to improve air quality by releasing negative or positive ions into the air. Using high voltage of approximately 5 kV, negative ions are produced, while positive voltage generates positive ions. Environments rich in negative ions are believed to offer numerous health benefits.

How Does a Negative Ionizer Work?

A negative ionizer transforms polluted air into clean air using negative electric charges. These devices not only purify the air but also feature advanced operation modes capable of killing germs and reducing free radicals. Thanks to these features, they can significantly improve air quality, especially in enclosed spaces.
Negative Ionizer Circuit and Construction

This application, which operates on a similar principle to the “Negative Ionizer Air Purifier Circuit” project I shared earlier, has been implemented using a popular kit available on the market. In this article, you can find detailed information on building a negative ionizer and exploring different applications.

The simplest and most effective method of generating negative ions is by using a Cockroft-Walton multiplier circuit. This circuit, consisting of a series of diodes and capacitors, doubles the voltage to ensure high efficiency. Although the negative ionizer circuit is specifically designed to produce negative ions, it is possible to convert it into a positive ion generator by reversing the diodes in the circuit.

Key Considerations

Output Pins: You can use trimmed material legs for the negative ionizer output pins. Sharpening the tips can enhance ion production efficiency.

Safety: Ensure that the outputs do not come into contact with any surfaces. Additionally, mounting the circuit in a suitable enclosure can improve safety and extend the device’s lifespan.

Assembly: The output pins should be positioned to protrude almost out of the enclosure, allowing ions to disperse more effectively into the air.

Benefits of a Negative Ionizer

Improves Air Quality: Negative ions neutralize airborne particles, creating a cleaner environment.

Reduces Germs: Advanced operation modes can kill germs in the environment.

Decreases Free Radicals: Negative ions reduce the effects of free radicals, promoting a healthier space.

Conclusion

A negative ionizer or ion generator is an effective solution for improving air quality, particularly in enclosed spaces. With simple methods like the Cockroft-Walton multiplier circuit, you can build your own ionizer. However, by taking safety precautions and ensuring proper assembly, you can maximize the device’s efficiency.

Negative Ionizer Test

When connected to 220V, you will hear a slight hissing sound from the output pins after 4–10 seconds. This is the sound of ions being released into the air. Alternatively, place a candle in front of the output pins, and you will observe the flame’s direction changing.

For the initial test, if the circuit board is placed on plastic, wood, or newspaper, it may not work. The board should be elevated to avoid contact with any surface during testing or mounted in an enclosure. For example, when mounting it in a plastic box, do not screw it directly, assuming plastic is non-conductive. Instead, elevate it properly.
Is Negative Ion Beneficial?

This topic has been extensively researched. Studies range from so-called pseudoscientific claims to reputable scientific investigations.

Baron, Robert A. (1987). Effects of Negative Ions on Interpersonal Attraction: Evidence for Focusing. Journal of Personality and Social Psychology, 52(3), 547–553.

Baron, Robert A. (1987). Effects of Negative Ions on Cognitive Performance. Journal of Applied Psychology, 72, 131–137.

Dolezalek, Hans. (1986). Atmospheric Electricity, Ions, and Pseudoscience. Skeptical Inquirer, 11, 56–60. See also the follow-up article by James Rotton (1987) in the same journal, 11, 305–306.

Additional Features of the Negative Ionizer

A similar negative ionizer circuit has been implemented with the addition of a fan to enhance ion dispersion. Additionally, a thin carbon filter has been placed on top of the negative ionizer box to minimize dust accumulation.
Key Points to Consider

Initial Testing: Ensure the circuit board is elevated or mounted in a non-conductive enclosure to avoid malfunctions.

Safety: Avoid direct contact with the output pins and ensure proper insulation.

Enhancements: Adding a fan improves ion dispersion, while a carbon filter reduces dust, making the device more efficient.

CAUTION Negative Ionizer Circuit works with high voltage and produces high voltage, be careful, pay attention to capacitor connections, there may be big explosions at high voltage, use Fused Power Line, protective glasses before operating the circuit. Using Negative Ionizer continuously may be harmful, ventilate the area where it is located from time to time.