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CityU develops DIY negative pressure air device to prevent cross-infection in residential care homes for the elderly

2022-04-19T14:37:36.190Z


The fifth wave of the epidemic in Hong Kong has taken the lives of many elderly people. A group of teachers and students from the Department of Architecture and Civil Engineering of City University of Hong Kong have developed a negative pressure air shield device suitable for the elderly residential environment. Using fluid mechanics simulation technology,


The fifth wave of the epidemic in Hong Kong has taken many elderly lives. A group of teachers and students from the Department of Architecture and Civil Engineering of City University of Hong Kong have developed a negative pressure air shield device suitable for the environment of the elderly's residential environment. , in order to prevent cross-infection in residential care homes for the elderly.

Before the Easter holiday, the device was sent to an isolated area of ​​an elderly home for trial use, and a fire prevention function will be added in the future.


Some students who participated in the design said that the negative pressure device is made of simple materials, hoping that the public can make it in isolation at home.


The negative pressure air shield device is mainly made of cardboard, aluminum tube, adhesive paper, etc. The main principle is to arrange the upper body of the elderly to lie in the carton, and send the air exhaled by the elderly through the aluminum tube to the air purifier. Air is drawn to the air filter.

Zou Jingyu, a professor in the Department of Architecture and Civil Engineering at CityU, who is in charge of organizing the research and development team, said that considering the feelings of the users, the installation cost of the whole installation is about 2,500 yuan, such as installing transparent windows on the cardboard ceiling.

Zou Jingyu explained the design concept and principle. He pointed out that many elderly people were cross-infected due to insufficient environment or lack of isolation facilities. Therefore, a simple negative pressure air shield device was developed using the principles of aerodynamics and architectural expertise.

The negative pressure air shield was sent to a home for the elderly in Tseung Kwan O for trial operation, and the design was revised based on field experience.

Yang Jiawen, the fourth grader, said, "After sending it to the elderly home for installation, physical changes were made. For example, it was found that the elderly's mattress was quite high, but the original design of the device was not high enough, and the elderly could easily bump their heads."

Some students who participated in the design and production said that the initial design concept originated from the SARS outbreak in 2003. In the early fifth wave of the epidemic, many elderly people were cross-infected due to the environment of the institution, and the hospital lacked good isolation facilities. It is hoped that with low-cost materials that can be buried anywhere, it is convenient for the public to make their own products.

The most expensive part of the device mainly comes from the air filter, and the cost and function of different filters are different.

Wu Zhaotang, Head of the Department of Architecture and Civil Engineering at CityU, said that although the epidemic is gradually stabilizing, the design can be prepared for a rainy day. Make up at will."

An increase of 14,000 cases in a single day is less than 20,000 Zhang Zhujun for two consecutive days: the outbreak in the institution seems to be declining | 600 positive cases are added. Update Anti-Duplicate Scanning Code Diners who are not eligible will beep

Source: hk1

All news articles on 2022-04-19

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