Only effective in interaction of the systems

Effective and safe ionization is only possible with an autonomous and regulated system. Suitable sensors, high quality regulation electronics, robust regulation algorithms, powerful ionization generators and continuous data recording are necessary for this purpose.

Measuring with high-quality sensors

Air quality sensors, so-called «electronic noses», measure or «smell» the odor pattern in the outdoor air and extract air/indoor air continuously. The measurable chemical group of elements is called Volatile Organic Compounds (abbreviated to VOC). The sensor element measures the sum of the VOCs (the so-called TVOC Total VOC). The sensors are matched in a complex calibration process in-house to the specific requirements.

The flow sensor measures the air speed in the air duct in accordance with the principle of thermal anemometry.

The atmospheric humidity sensor measures the relative humidity continuously.

The ozone sensor, a self-development, works on the basis of an ozone-sensitive semiconductor element. Technologically, since this sensor element has a strong dependence on the temperature and relative humidity of the air to be measured, the temperature and the relative humidity are also measured in the ozone sensor device. Therefore, the measured ozone sensor value is compensated against these highly fluctuating parameters and is very accurate.

Controlling with high quality regulation electronics

The power regulator in the ionair AQS is called ICE-A.

The job of the regulator is to record the five sensor values measured (left to top) continuously. It «knows» the indoor climate definitively at all times. Since it is also aware of the past, it can forecast the «future» with the help of sophisticated algorithms and calculate an optimal control variable for the ionization intensity.

The ionization intensity can take any value smoothly and continuously from 0 to 99. This value now determines, using the principle of pulse width modulation (PWM), how strongly the ionization generators (one or more ionization modules) ionize.

The ionized air is now dosed exactly such that the air pollutants get neutralized and reduced in the best possible way. This regulation principle is often called need-based or situation-based (dynamic). What is central in this connection is that thanks to the sophisticated regulation, no concentrations of ozone occur which can be detected by odor or that are primarily unhealthy. If excessive ozone concentrations occur due to the high concentrations of ozone in the outdoor air or a malfunction of the system, the ozone monitor sensor will detect this and the regulator will adjust the ionization intensity so that the system continues to work safely and reliably.

Therefore, the Ionair AQS should be designated with respect to risk assessment as an intrinsically safe system. This has also been attested by third parties in the course of various certifications.

Ionization generator: always in optimal mode

The control variable of the power regulator (ICE-A) is the ionization intensity. It activates the ionization module and thus, its ionization tubes. The electric field (E-field) generated at the ionization tubes is just so strong that oxygen molecules can be ionized. In other words: an electron gets split from an oxygen molecule (positive oxygen ION) or an electron collides with an oxygen molecule (negative oxygen ION). The energy transferred to the supply air with this leads to the natural reduction of pollutants in the indoor air.

 

Monitoring with continuous data evaluation

The ionair AQS generates valuable operational data continuously. The data show how the systems are working, generate alarms for the customer about any abnormalities and provide assistance in preventive maintenance. The evaluation of operational data enables the systems to be optimized continuously and thus, to adapt to changing needs (e.g. a reorganization leads to more personnel in the office, the hygiene level in a nursing home needs to be enhanced, etc.).

In short: The customer benefits with the data recording from a high level of transparency and good operational safety. And it goes without saying that the customer has access to his/her Ionair AQS systems whenever desired with the help of a secure internet link or smartphone app.