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冷冻技术与国计民生关系密切,在人民生活方面用于冷气设备,冰箱等;在工业中,用于液化天然气、液化石油气、温差发电、磁悬浮列车、低温送电、超导能量贮存等新技术。以往和目前的冷冻技术是以压缩氨、氟里昂再使之膨胀的方法来制造低温。十年前一种新型冷冻技术——电子冷冻的研究曾活跃过一段时间,但至今仍未能实现工业化。磁冷技术近来得到重视。磁冷技术就是对特殊磁性体加以磁场使之磁化,然后,再取消磁场使之消磁,在磁化和消磁过程中,伴随有放热、吸热现象,因而可达到冷冻的目的。
Frozen technology is closely related to national economy and people’s livelihood, and is used for air-conditioners and refrigerators in people’s daily life. In the industry, it is used in liquefied natural gas, liquefied petroleum gas, thermoelectric power generation, maglev trains, cryogenic power transmission and superconducting energy storage. In the past and the current freezing technology is compressed ammonia, freon and then make it expand to create a low temperature. Ten years ago, a new type of freezing technology - the study of electronic freezing has been active for some time, but so far it still can not be industrialized. Magnetic cooling technology has recently been given attention. Magnetic cooling technology is a special magnetic field to make it magnetized, and then cancel the magnetic field to demagnetization, magnetization and degaussing process, accompanied by exothermic, endothermic, which can achieve the purpose of freezing.