How To Control Ozone Emission From Penguin Plasma Air Sterilizing Robot ?

The ozone emission of the penguin plasma air disinfection robot is lower than 0.046PPM

On August 8th, Shenzhen, China, the plasma sterilizing robot-Penguin developed by BooCax has a built-in low-temperature plasma generator. The plasma contains a large number of active oxygen ions, high-energy free radicals and other components, and the active groups are very easy to interact with bacteria. , mold and spores, the protein and nucleic acid substances in the virus undergo oxidation reaction and denature, so that all kinds of microorganisms die, to achieve the purpose of sterilization. No matter which type of plasma generator is used, ozone will inevitably be generated when plasma is generated during the disinfection and purification process. How to control the amount of ozone emissions through scientific and effective methods to achieve the purpose of human-machine coexistence without harm within the scope of environmental protection requires customers further product knowledge.

Penguin uses an imported plasma module, and the plasma density value is as high as 9.1x1018/m³, which is 100 times the plasma density value of the same type of air sterilizer on the market; the higher the plasma density value, the higher the plasma density. The number of times of air disinfection by the air volume is relatively reduced, so that the disinfection and killing rate of more than 90% of the natural bacteria in the air can be achieved in a shorter time; of course, the higher the plasma density value, the higher the corresponding amount of ozone generated. Therefore, when our product manager designed the Penguin plasma disinfection robot, the default ozone concentration has been preset through the internal program to 0.1mg/m³=0.046PPM, which is lower than the safe ozone concentration of 0.06PPM stipulated by the World Health Organization WHO. Including the 0.120PPM concentration value corresponding to the national ambient air quality standard NAAQS set by the US EPA, it meets the global indoor environmental ozone emission and follows the environmental protection requirements of not causing human harm.

In practical applications, in order to prevent customers from incorrectly setting the ozone concentration after receiving the product, our R&D team has hidden the function of ozone concentration setting on the Penguin Android APP. In some special environments, if customers have specific requirements for ozone emission, we will open the authority to enable this function to help customers achieve the purpose of specific ozone emission values.

In addition, the Penguin Plasma Disinfection Robot APP can deploy a disinfection route, and the internal program can actively calculate the disinfection volume (default space height = 2.5 meters) according to the disinfection route, and then adjust the ozone emission within the safe concentration range to ensure that it will not cause harm to the human body.

In our CMA report, it is shown that the testing agency placed the equipment in a closed space of 20m³, the testing environment is: the temperature is 20°C, the relative humidity is 51%, the ozone testing device is 1.5 meters away from the ground, and the equipment runs continuously for 60 minutes:

Every 5 minutes, the ozone concentration in the working environment was measured, as shown in the following table: 12 tests were conducted for each round of testing, and 3 rounds of testing were conducted consecutively, and the average ozone concentration was calculated to be 0.02mg/m³=0.01PPM, which is much lower than the safe ozone concentration set by WHO and EPA.

In order to test the limit value of ozone emission from the Penguin plasma medical air sterilizing robot, we placed the equipment in a space of 255m³, and adjusted the indoor temperature and humidity to lower harsh conditions. The test data is as follows:

Parameter name Reference Constant setting

Ozone production per hour 56mg/H

Amount of ozone produced per minute 56mg/60=0.933333333333333333mg/minutes M（mg）

Attenuation coefficient of ozone production per minute 0.9771599684342 α

Calculate the current space volume L（m³） Space height2.5m-3m

2.8m for reference L

Maximum allowable ozone concentration ρ

The total amount of ozone allowed in the current space L*ρ（mg）

Allowable amount of ozone L*ρ（mg） Plasma sensor needs full on time(min) log（1-L*ρ（1-α）/M

÷log(α)

Long time decay coefficient of ozone 43.782776618285 β

Plasma Generator On Time L*ρ/β：

Plasma generator off time 1-L*ρ/β

According to the description of the product manager of BooCax, the Penguin plasma air sterilizing robot operates in a space of 255m³. According to the size of the space, when the plasma module is adjusted to the maximum value, the maximum amount of ozone that can be generated is 0.16mg/ m³=0.082PPM, ozone will have a half-life after it is produced. After 30 minutes, the amount of ozone will be halved to =0.08mg/m³=0.041PPM. Therefore, under extreme conditions, the final ozone concentration is still in line with WHO and EPA ozone. Within the safe concentration range, it will not cause harm to the human body.

If the amount of ozone in the L (m³) space has reached the upper limit, and the maximum ozone concentration needs to be maintained within the value of ρ (mg), the calculation of the switching frequency of the plasma generator refers to the following figure:

Parameter name Reference Constant setting

Long time decay coefficient of ozone 43.782776618285 β

Plasma Generator On Time 1*ρ/β

Plasma Generator Off Time 1-L*ρ/β

Plasma Generator On Time （suggested） ≧3s preferably 10s

Plasma Generator Off Time （ suggested ） ≧3s

Execute close time first Re-execute turn-on time

Plasma technology integrates active disinfection and passive disinfection. It has the dual functions of sterilization and decomposition of formaldehyde and benzene. It does not produce consumables and does not produce secondary pollution. It can be used in an environment where humans and machines coexist. It is suitable for hospitals, I, III Class environment, such as clinics, wards, offices, general operating rooms and other places;

In the future, for certain places of customers who need specific setting requirements for ozone concentration, the BooCax team can assist customers to achieve corresponding functions through ODM customization on software and hardware, and promote the implementation of projects in the customer's market.

More information, please kindly contact us via globalsales@boocax.com

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