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45分钟，室温降到-269℃ 杭州造的“超级冰箱”可以量产了_我的网站

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A man in East China's Jiangsu Province who recently tried to swim across the Yangtze River to Shanghai to save travel costs is rescued by police. Photo: Screenshot from Jiangsu TVA man in East China's Jiangsu Province who recently tried to swim across the Yangtze River to Shanghai to save travel costs was rescued by police after drifting for nearly two hours in the busy shipping channel, exhausted and stricken with leg cramps, Jiangsu TV reported.
Police received a report around noon on August 4 that a man was swimming near a park, where heavy vessel traffic made the situation particularly dangerous. After a coordinated search by land and water, officers located the man, according to multiple media reports.
However, the man initially refused to board the police boat. Officers then learned that he intended to swim across the Yangtze River to Shanghai to avoid paying for transportation, according to Jiangsu TV.
The section of the Yangtze in Nantong is wide and has strong currents, while the main shipping channel is busy with passing vessels. The attempt posed serious risks not only to the man himself but also to the safety of vessels navigating the river, policemen said, per media reports.
After nearly 30 minutes of persuasion, the man finally abandoned his plan and boarded the police boat. He had by then spent about two hours in the water and was exhausted, suffering from severe leg cramps. Police officers provided him with food and water and took him to a police station to rest.
The police later identified the man as a native of Linyi, East China's Shandong Province, and found that he had a mental health condition. They contacted his family and the Nantong rescue center and arranged for him to undergo a psychiatric assessment.
His family subsequently took him back to Shandong and thanked the officers for rescuing him.
Global Times
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二 | 杭州造出了可量产“超级冰箱”。2025年8月，杭州白马湖实验室造出了一台“超级冰箱”。在零下268.95摄氏度的液氦温区，这台脉管制冷机的制冷量达到了1.8到2瓦，降温时间稳定在45分钟左右。这个温度，离绝对零度（零下273.15摄氏度）只差4.2开尔文，被称为现代前沿物理世界的“门槛温度”。

三 | 今年5月，记者曾专访“超级冰箱”研发团队。这是国内首台采用单一气库技术路线、实现1.5瓦以上制冷量的脉管制冷机，近日，正式通过量产验证。怎么理解这台“超级冰箱”的原理？白马湖实验室氢能储运团队独立首席研究员方凯解释：气体被压缩的时候，会放热。反过来，如果让高压气体“嘭”一下释放出来，猛地膨胀，它就会疯狂吸热，周围就会冷下来。这就是“脉管制冷”技术。