Patent ID: 9448292
Filing Date: 2016-09-20
CPC Classification: G01R

Claim Text:
1. A cryoprobe using a closed gas loop for a nuclear magnetic resonance apparatus, comprising: superconducting magnets providing a magnetic field; a rotor rotatably disposed between the superconducting magnets in the state of a sample being put therein, the rotor being rotated by a driving gas; a coil configured to generate a nuclear magnetic resonance spectrum according to a resonance phenomenon of the sample by applying a radio frequency to the rotor; and a gas loop configured to cool the driving gas in a cryogenic condition while circulating it in a closed-loop condition and to supply the driving gas to the rotor, wherein the gas loop includes: a reserve tank connected to one side of the rotor and configured to introduce the driving gas which rotates the rotor and to absorb pressure while storing the driving gas; a refiner configured to refine impurities included in the driving gas by condensing the impurities while cooling the driving gas discharged from the reserve tank with a cooling fluid and allowing the driving gas to flow through the cooling fluid; a storage tank configured to store and discharge the driving gas refined in the refiner in a predetermined capacity; a heat exchanger configured to cool the driving gas to a cryogenic condition by performing heat-exchanging between the driving gas discharged from the reserve tank and a refrigerant and to supply the cooled driving gas to other side of the rotor; and a refrigerant cooler configured to cool the refrigerant that has been heat-exchanged with the driving gas while circulating the refrigerant to the heat exchanger.