PROBLEM TO BE SOLVED: To provide square ice for preventing and restricting oxidization and deterioration of fresh foods as well as breeding saprophyte and provide its manufacturing system and process of manufacture.SOLUTION: A system for manufacturing nitrogen-substitution-type square ices weighing 36 kan, that is 135 kg, includes: a nitrogen gas supply part 10 for supplying nitrogen gas at a prescribed pressure； a cooling nitrogen water generating part 20 including a water reservoir for storing raw material water to generate nitrogen water, cooling means for cooling water stored in the water reservoir, and nitrogen gas feeding means for feeding nitrogen gas supplied from the nitrogen gas supply part 10 into water stored in the water reservoir； and a nitrogen-substitution-type square-ice generating part 30 including a plurality of ice cans immersed in a brine tank kept at water freezing temperature, charging means for charging nitrogen water supplied from the cooling nitrogen water generating part 20 into each of the ice cans, and gas feeding means for feeding nitrogen gas supplied from the nitrogen gas supply part 10 into a non-frozen part of nitrogen water during freezing of charged nitrogen water.SELECTED DRAWING: Figure 1【課題】生鮮食品の酸化劣化を防止抑制し、雑菌増殖を抑制する角氷、その製造システム製造方法を提供する。【解決手段】窒素置換した３６貫の角氷を製造するためのシステムが、窒素ガスを所定の圧力にて供給する窒素ガス供給部１０と、窒素水を生成するべく、原料の水を貯留するための受水槽と、受水槽に貯留した水を冷却するための冷却手段と、窒素ガス供給部１０から供給される窒素ガスを受水槽に貯留した水に注入するための窒素ガス注入手段と、を具備する冷却窒素水生成部２０と、水の凍結可能温度に維持されたブライン槽内に浸漬された複数のアイス缶と、冷却窒素水生成部２０から供給される窒素水を各アイス缶に充填するための充填手段と、充填した窒素水の凍結中に、窒素ガス供給部１０から供給される窒素ガスを窒素水の未凍結部分に注入するためのガス注入手段と、を具備する窒素置換角氷生成部２０と、を有する。【選択図】図１
