The nitrogen liquefaction device belongs to the field of industrial air separation production technology, which uses a set of device to liquefy nitrogen by deep freezing. Nitrogen liquefaction equipment through advanced, efficient plate fin heat exchanger heat exchange, so that nitrogen liquefaction, as a product output, in order to facilitate storage and transportation, it mainly uses the external circulation expansion refrigeration cycle principle, so that many enterprises in the economic benefits have been improved. a set of device that uses deep freezing method to liquefy oxygen.Gas Liquefier website:http://www.cryoseparation.com/gas-liquefier/