| 摘要 |
<P>PROBLEM TO BE SOLVED: To efficiently make a large amount of ice/nitrogen ice by freezing nitrogen water (water obtained by replacing dissolved oxygen in water with nitrogen gas). <P>SOLUTION: This nitrogen ice making device for producing nitrogen ice which is ice obtained by freezing the water prepared by replacing the dissolved oxygen in water with the nitrogen gas, includes: a water tank (30) having airtightness for blocking intrusion of a gas from ambient air; a nitrogen gas injector (28) for injecting the nitrogen gas to the water passing therethrough; a nitrogen gas extractor (14) for extracting the nitrogen gas from the air and supplying the extracted nitrogen gas to the nitrogen gas injector (28); water circulating means (31, 20, 32, 22) for taking out the water from the water tank (30) and circulating the water so that the water passes through the nitrogen gas injector (28) and then returns to the water tank (30) to obtain the water replaced with the nitrogen gas from the water in the water tank (30); and an ice making machine (40) for making the nitrogen ice by freezing the nitrogen gas-replacement water taken out from the water tank (30). <P>COPYRIGHT: (C)2012,JPO&INPIT |
