Street air purifier of students: Just block fine dust, just make billboards

The students' solar air purifier has a simple operation principle with low cost but great efficiency.

Prominent in the exhibition booth of Thua Thien Hue Youth and Children Innovation Contest in 2019 is ' Air dust filter using solar energy for road applications' of Tu Thai Nguyen (Nguyen Hue High School, Hue City).

The result after two months of death

Nguyen expects that the equipment will be placed on road routes, while air filtration and replacement of advertising signs. Thereby, a small contribution to the fresh air.

The machine was put to the test on the street.(Photo: Nhat Tuan).

Sharing with Discovery Magazine, Nguyen said, currently, there are many types of air purifiers made from various functions ranging from dust filtering to filtering harmful gases. The scale of use of air purifiers varies from households to urban streets of India, China and countries in Europe. However, the manufacture and application of air purifiers suitable for streets in Vietnam have not been interested.

'I think, why don't I make an air purifier based on what the world has done at a cheaper cost, easier to access users and apply to life in the easiest way' , Nguyen share.

Taking advantage of his free time, Nguyen researched and eventually managed to create results after two months of net death. Accordingly, this friend had an idea based on the design of the family air purifier to create a air filter for the street but still ensure low production and maintenance costs.

Nguyen's air purifier has two propeller engines in the same direction with the aim of an exhaust fan, an air push fan to increase the filtered air flow. The number of filters can be flexibly added to suit the local situation. Basically, the machine always has two dust filter plates, a coarse-sized dust filter plate and a PM10 dust filter plate.

Air filter in the air using solar energy.(Photo: Nhat Tuan).

The filter plates are cleaned continuously thanks to the vertical water system. The pump is responsible for bringing water from the clean water compartment to the filter plates.

'When the sun is shining, the solar panel will power the device. The propeller will push air into the device, the exhaust fan also works to create air flow. Through the first filter, the coarse particles will be trapped and through the second filter, smaller sized particles will be retained. The air escaping will have less dust than the original airflow , 'Nguyen said.

Air after filtering reduces 30% of dust density

Nguyen's dust filter model can be upgraded, replacing air filter plates easily. Nguyen has also installed equipment on some of the city's roads. Dust filtering tests are carried out using dust sensors (sensors) .

Basically, the machine always has two dust filter plates, a coarse-sized dust filter plate and a PM10 dust filter plate.(Photo: Nhat Tuan).

Nguyen said that, compared to the existing equipment, the machine is cheap, using solar energy, so it does not consume electricity, is easy to install and repair. When mounting on the street, it can filter and also have space on the machine to install billboards.

'I feel satisfied because this is a machine made by my own hands, contributing to cleaning up the atmosphere where I live. The machine has a very simple operation principle with low cost but great efficiency. Its filtering effect also surprised me. The air after 30% reduction in dust density ' , Nguyen said.

The air purifier has 2 propeller motors in the same direction with the aim of an exhaust fan, a push fan.(Photo: Nhat Tuan).

In the near future, Nguyen will complete the machine to participate in the National Youth and Children Innovation Contest, and also integrate more classes of bad smell gases and other toxic gases, study and attach more ultraviolet light system to remove some types of bacteria that can be harmful to human health .

Sharing about his pupil, Mr. Tran Thien Lan - instructor said, Nguyen actively sought out teachers to apply for scientific research topics. After the teacher agreed to accept, she boldly presented the research idea and offered help.

'Nguyen has a very good ability to use the knowledge of mechanical and electronic techniques to apply to manufacturing equipment. I have the qualities to become a mechanical-electronic engineer in the future , 'Lan said.

With this device, Nguyen was awarded the fourth prize in the provincial Science and Technology Innovation Contest in 2019, the third prize for the Youth and Children of the province in 2019. (Photo: Nhat Tuan).

Talking about the topic, Lan said that the idea of ​​the topic is very good. The device that the topic aims to convert photovoltaic energy into electricity is then a function to retain airborne particles.

'It works both to make fresh air and to lower the ambient temperature because the solar energy is converted into heat, which has somewhat reduced. However, in order to have a real effect in the large space around it, it is necessary to deepen further research and need the support of experts in the field of mechanics - electronics and the environment. ' , Lan commented.

Mr. Lan also expects the device to be compact and capable of collecting dust on the sieve. In addition, if the device can be considered as a module to easily assemble together to form a larger device, then it will be practical.

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