Home  Contact Us
  Follow Us On:
 
Search:
Advertising Advertising Free Newsletter Free E-Newsletter
NEWS

Air-conditioning Spread the Coronavirus to 9 People
Published on: 2020-04-27
Share to
User Rating: / 0
PoorBest 

ACThree seemingly healthy families were struck by COVID-19 after dining at neighboring tables in a windowless restaurant in Guangzhou.
 

Researchers studying the case think that the restaurant's air-conditioner blew the viral droplets of one person who was asymptomatic farther than they might have normally gone. Nine other people across the three families later got sick.

AC 4It's a frightening prospect for people trying to keep a healthy distance from others. But in a potentially hopeful finding for the locked-down restaurant industry, none of the 73 other diners and eight employees in the restaurant at the time got sick, the researchers added.

AC 3For the struggling restaurants desperate to reopen in the coming months, the researchers' findings are evidence that work will not just return to normal after the pandemic, but there might be ways to limit the risk of spreading the virus. There will likely be caps on how long patrons can spend eating, restaurants will operate at lower capacity, air-conditioning or heating may have to stay off, and employees might be advised to wear masks.
 

3个家庭同一餐厅用餐,9人感染

一家人一起到餐厅吃个饭,然后就“中招”了?
 

一篇广州市疾病预防控制中心的研究,涉及一同在餐厅就餐的3个家庭,每个家庭都出现了新冠肺炎感染病例。
 

据研究,广州的A、B、C三个家庭,共10人在同一家有空调的餐厅用餐。该餐厅是一栋5层楼的空调大楼,没有窗户。三楼用餐区占地145平方米,每个楼层都有自己的空调。每张桌子之间的距离约为1米。A和B家庭分别坐了53分钟,A和C家庭坐了73分钟。中央空调的出风口和回风口位于C桌上方。而A家庭刚刚从武汉回来,结果均被感染。


为什么在餐厅里吃个饭会被感染呢?

调查人员排除了气溶胶传播后,经过进一步的研究推测认为:暴发的最可能原因是——液滴传播。
 

其实,就是大家熟悉的 “飞沫传播”,而空调在这里做了“帮凶”。
 

研究提到,较大的呼吸飞沫(> 5微米)在空气中保留时间很短,移动距离也有限,通常1米。
 

但是, 来自空调的强劲气流可能会将液滴从C桌传播到A桌,再传播到B桌,然后再传播回C桌(出风口→C→A→B→进风口)。
 

对此,研究人员建议:
 

餐厅需要增加餐桌之间的距离
并注意空调风向和改善室内通风

Comments (0)Add Comment

Write comment

security code
Write the displayed characters


busy
    Subscription    |     Advertising    |     Contact Us    |
Address: Magnetic Plaza, Building A4, 6th Floor, Binshui Xi Dao.
Nankai District. 300381 TIANJIN. PR CHINA
Tel: +86 22 23917700
E-mail: webmaster@businesstianjin.com
Copyright 2024 BusinessTianjin.com. All rights reserved.