College students invented the air purification "artifact" and reduced the PM2.5 to 1 with ultrasound

Ultrasonic air purifier made by the team of Shanghai Health Medical College.

The air pump draws indoor air into the water tank, and the ultrasonic vibration piece vibrates to send out the cleaned air.

On December 26th, the “Ultrasonic Indoor Air Cleaner” created by the Shanghai Health Medical College team won the first prize of the first Shanghai University Student Makeup Competition. The competition was hosted by the Shanghai Municipal Education Commission and featured the theme of “Creating the Future and New Life”. The contestants came from various universities in Shanghai.

On December 24th and 25th, 18 finalists were hand-made at the Tongji University School of Design and Innovation to turn their ideas into products. On the 26th official road show, on-site review.

The first Shanghai University Student Makeup Competition was held at the School of Design and Innovation of Tongji University.

“Smart refrigerator”, “smart smoking ash ashtray”, “garbage mother”... On the 26th road show scene, 澎湃News () saw that these college students created a lot of people’s eyes. "Intelligent hardware." Most of these products are based on actual needs and are designed with hardware and software.

The team of the Shanghai Health Medical College, which won the first prize, told the journalist that the biggest innovation of their work was the use of ultrasound for air purification. According to them, the air purifiers on the market are basically fan plus filter mode, and the replacement cost of the filter is high.

“Our initial idea was very simple. It was to design an innovative product to solve the current smog problem.” As the team leader and the second-year student of biomedical engineering at Shanghai Health College, Shen Jiayi said that some characteristics of ultrasound were discovered. The cavitation effect can be used in the product.

The team introduced their own design ideas: "I can imagine that there are a lot of bubbles in the air, and the wrapped contaminants can't be completely washed. We want to use ultrasonic waves to break these bubbles, will it improve this?"

After continuously debugging the ultrasonic frequency, the experiment finally proved this idea. "The indoor air with a PM2.5 value of about 60 or 70 is directly purified by water. The PM2.5 value can be reduced to more than 20, and after ultrasonication, the minimum can be reduced to 1." Shen Jiayi said.

Although the experiment verified the feasibility of the idea and the cost of the work was not high, the team also admitted that further research is needed on the efficiency of air purification and the noise generated by the air pump.

The decorative lights produced by the Shanghai School of Visual Arts have an air quality indicator.

In this competition, the Shanghai Visual Arts Institute's Maker team also paid attention to the theme of smog. The team produced a decorative light that was programmed to relate the air detection results to the color of the LED lights. “Light white means normal air quality, yellow is normal, and red is heavily polluted.”

The team told reporters that they mainly came from the brand management profession, and they did not know much about structural engineering and interaction design. Therefore, they invited other professional students to be “foreign aids” and completed the work together.

Ding Junfeng, director of the Fablab O Lab of the on-site judges and design and creative college of Tongji University, told the reporter that the creative ability and final project completion of the students in this competition were both pleasant surprises, but in general there were also insufficient hands-on ability and insufficient ideas. problem.

"Some students have come here to know that there are so many digital manufacturing equipment available." Ding Junfeng said that many students are still accustomed to their own professional thinking problems, lack of knowledge structure, "more or like to think from the social level The problem, but there are not many personalities and hobbies."

In the end, in addition to the first prize of the ultrasonic air evolution device, the AD love cognitive training gloves project won the second prize, and the items such as emotional drawing board, intelligent fun refrigerator and garbage mother won the third prize.