世界上最独特的致冷机有可能很快就会问世。美国洛萨拉芒国立试验室正在研制的这种致冷机既不用压缩机,也不用马达,更没有各种复杂的管道。试验中的“冰箱”只是一根三英尺长的缸筒,里面叠置有一些矩形的玻璃纤维板。缸内充以氦气或其他气体,一端用挠性膜片封死。当膜片与磁铁、音圈和电线接上后,便构成了一微小的扬声器,将电磁振荡转变成膜片的迅速振动。物理学的一条基本原理是,气体被压缩时温度升高,反之温 The world's most unique cooler may come out soon. The cooler, being developed by the National Laboratory in Losalamoon, USA, uses neither compressors nor motors and no complicated pipes. The “refrigerator” in the test was just a three-foot-long cylinder with a number of rectangular fiberglass sheets stacked. Cylinder filled with helium or other gases, one end sealed with a flexible diaphragm. When the diaphragm and magnets, voice coil and wire connected, they form a tiny speaker, the electromagnetic vibration into the diaphragm of the rapid vibration. A basic principle of physics is that when the gas is compressed, the temperature rises, and vice versa