USEUROPEAFRICAASIA 中文雙語Fran?ais
    China
    Home / China / Society

    Air-conditioned vests offer relief from the heat

    By WU NI | China Daily | Updated: 2013-08-15 01:55

    Air-conditioned vests offer relief from the heat

    An air-conditioned vest that can cool workers in the heat has become popular and sold out during the current heat wave in southern China.

    Wang Yan, a 40-year-old businessman in Nantong, Jiangsu province, invented the vest. He recently revised the device so that it can lower the temperature around the wearer by up to 20 degrees.

    "It means when the temperature is 40 C, someone wearing the vest will feel as if it were 20 C," he said.

    Wang opened a factory to make the vests he invented, and has sold about 4,000 of them in the last three months — 40 percent more than last year.

    Each vest sells for about 200 yuan ($33).

    Wang was an electric welder in the 1990s, and temperatures in his workplace often reached 50 C in the summer.

    "Normally, manufacturing workshops are not equipped with air conditioning because the area is too spacious and cannot be tightly closed, so I think it's best to wear a personal air conditioner," he said.

    The vest is made of impermeable fabric to lock in the cool air, he said. Cool air is distributed through small tubes with tiny holes that are inside the vest.

    The key to the device, Wang said, is a vortex tube that produces cool air.

    "Compressed air is delivered into the vortex tube, swirls quickly and forms a funneled airflow, like a tornado, causing hot air to sink and cool air to float," he said. "The cool airstream is distributed through the vest through a tube, while the small amount of hot air is emitted."

    Wang originally wrapped the cool air tubes around him when he worked. He later managed to integrate the tubes into the vest. He then continued renovating the vest to make it cooler.

    The vest requires compressed air that can be produced from an air compressor pump.

    A pump can sustain several vests, he said, adding that many factories are equipped with compressed-air pipelines that make using the vest more convenient.

    Two valves are on each side of the vortex tube. One controls the inflow of compressed air, and the other controls the cool-air output, with which the user can regulate the temperature.

    "Normally when the temperature is around 35 C, the vest can lower it to about 25 C in 30 seconds," Wang said.

    Wang Hongxin, an electric welder in Nantong, feels comfortable while using the vest.

    "I wear the vest under my work clothes and feel my entire upper body cool down very fast," he said, adding that the vest is popular among his workmates.

    Wang Yan said the vest does not use harmful or flammable gas, making it safe to wear.

    Agreeing with that assurance is Li Tianbao, who has sold labor protection appliances in Nantong for years and tried the vest himself.

    "The vest is widely welcomed by workers in shipyards, container producers and other manufacturing companies," he said.

    Because of the lingering heatwave, the vests have been out of stock in Li's shop.

    "I sold about 400 vests this summer, 50 percent more than last year. I want to order more from Wang's factory, but he can't supply them," Li said.

    Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
    License for publishing multimedia online 0108263

    Registration Number: 130349
    FOLLOW US
     
    6080YYY午夜理论片中无码| 中文字幕一区视频| 日韩av无码免费播放| 久久久91人妻无码精品蜜桃HD| 中文字幕在线播放 | 亚洲Aⅴ无码专区在线观看q| 欧美中文字幕在线| 日韩免费人妻AV无码专区蜜桃| 欧美中文字幕无线码视频| 中文字幕在线精品视频入口一区| 精品国精品无码自拍自在线| 特级做A爰片毛片免费看无码 | 久久超乳爆乳中文字幕 | 亚洲日韩VA无码中文字幕| 日韩人妻精品无码一区二区三区 | 亚洲成AV人片在线播放无码| 久久五月精品中文字幕| 亚洲乳大丰满中文字幕| 少妇无码?V无码专区在线观看 | 人妻无码中文字幕免费视频蜜桃| 中文无码伦av中文字幕| 中文字幕无码一区二区三区本日| 免费无码中文字幕A级毛片| 亚洲午夜无码片在线观看影院猛| 播放亚洲男人永久无码天堂| 国产拍拍拍无码视频免费 | 国产精品午夜无码AV天美传媒| 亚洲AV无码一区二区三区性色 | 国产AV无码专区亚洲AVJULIA | 中文字幕亚洲欧美日韩2019 | 天堂√最新版中文在线| 无码任你躁久久久久久老妇| 亚洲v国产v天堂a无码久久| 精品无码国产污污污免费网站国产 | 无码国内精品人妻少妇蜜桃视频| 中国无码人妻丰满熟妇啪啪软件 | 日韩免费人妻AV无码专区蜜桃 | 无码国内精品久久人妻麻豆按摩| 久久av高潮av无码av喷吹| 久久99久久无码毛片一区二区| 亚洲精品无码专区在线播放|