2001年12月7日,美国能源部在艾奥瓦州立大学埃姆斯实验室的科研人员制成世界上第一台能在室温下工作的磁冰箱,它利用铁磁性制冷工质进出磁场制冷,其效率比普通冰箱高30%以上,且无污染、无噪音、使用寿命长,是一种极具发展前景的绿色环保制冷技术,我国也已将“磁制冷冰箱项目” December 7, 2001, the US Department of Energy scientists at Iowa State University Ames Laboratory made the world’s first magnetic refrigerator can work at room temperature, which uses ferromagnetic refrigerant into and out of the magnetic field refrigeration , Its efficiency is higher than the average refrigerator more than 30%, and no pollution, no noise, long service life, is a very promising green refrigeration technology, China has also been “magnetic refrigeration refrigerator project”