三级风冷低温致冷器可用来冷却电子元件,使其参数噪声指标降至50°K,达到国内先进水平。上海冶炼厂于1978年开始研制,解决了热负载大、允许消耗功率小、冷却温度低、自身尺寸大、采用风冷散热等困难,经过反复试验,研制终于取得成功。所消耗的功率为350W。即使把发热功率在3～5瓦的欲冷 Three air-cooled cryogenic refrigerator can be used to cool electronic components, the parameter noise index dropped to 50 ° K, reached the advanced domestic level. Shanghai Smelter started research and development in 1978 to solve the heat load, allowing low power consumption, cooling temperature is low, their size, the use of air-cooled heat and other difficulties, after repeated tests, the development was finally successful. The power consumed is 350W. Even if the heating power in 3 to 5 watts of cold