Patent ID: 8342820

Claim:
A cryogenic fluid circulation pump for circulating a cryogenic fluid to feed the cryogenic fluid, the cryogenic fluid circulation pump comprising: a magnet pump unit mounted in a vacuum chamber having an introduction channel and a discharge channel formed therein to prevent heat from permeating into the cryogenic fluid by convection for rotating by a magnetic force to circulate the cryogenic fluid, when a rotary force from a power source is transmitted to the magnet pump unit, wherein the magnet pump unit circulates the cryogenic fluid by a rotary unit configured to rotate in a housing having a fluid introduction port and a fluid discharge port formed therein by a magnetic force from a drive unit connected to the power source such that the drive unit can rotate, wherein the drive unit comprises a drive shaft directly connected to the power source and a drive member configured to surround an outer circumference of one side of the housing inside the vacuum chamber at one end of the drive shaft, the drive member having a plurality of magnets disposed at an inner circumference thereof in contact with the housing at predetermined intervals, and wherein the rotary unit comprises a rotary member comprising a magnet disposed at an outer circumference of one side thereof on a stationary shaft disposed in the housing such that the magnet can freely rotate and an impeller disposed at the side thereof opposite to the side where the magnet is disposed, at a position adjacent to the fluid introduction port and the fluid discharge port.