Method and apparatus for regeneration water
First Claim
1. A water regeneration method for discharging ice condensed in a portion cooled by a cryogenic refrigerator installed in a case to an outside of the case, comprising:
- a temperature increasing step for melting the ice into water at approximately atmospheric pressure and at a melting temperature of at least 273 K;
a vaporizing step for vaporizing water by performing a plurality of first roughing steps between the approximate atmospheric pressure and a first reduced pressure being less than the atmospheric pressure but higher than and yet close to a water-freezing pressure that causes the water to freeze;
a water discharge step for discharging water by performing a plurality of second roughing steps between a second reduced pressure and the first reduced pressure, the second reduced pressure being less than the atmospheric pressure and greater than the first reduced pressure; and
a water vapor discharging step for discharging water vapor by performing a plurality of third roughing steps between a third reduced pressure and a fourth reduced pressure, the third and fourth reduced pressures being less than the first reduced pressure and the third reduced pressure being greater than the fourth reduced pressure,wherein each one of the vaporizing step, the water discharge step and the water vapor discharging step occurs at the melting temperature of at least 273 K.
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Accused Products
Abstract
Ice condensed in a portion in a case in which a cryogenic refrigerator is installed, which is cooled by the cryogenic refrigerator, is melted by increasing a temperature of the ice to a melting point of the ice or higher. Then, while the temperature of the melted ice and a pressure thereof are kept to be equal to or higher than a freezing point of water, the pressure is reduced by rough evacuation so as to vaporize water. At a time at which the water is discharged, the pressure is further reduced so as to discharge water vapor. In this manner, regeneration of water is performed in accordance with a state of the water (i.e., a solid state, a liquid state, and a gas state), thereby shortening a regeneration time.
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Citations
14 Claims
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1. A water regeneration method for discharging ice condensed in a portion cooled by a cryogenic refrigerator installed in a case to an outside of the case, comprising:
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a temperature increasing step for melting the ice into water at approximately atmospheric pressure and at a melting temperature of at least 273 K; a vaporizing step for vaporizing water by performing a plurality of first roughing steps between the approximate atmospheric pressure and a first reduced pressure being less than the atmospheric pressure but higher than and yet close to a water-freezing pressure that causes the water to freeze; a water discharge step for discharging water by performing a plurality of second roughing steps between a second reduced pressure and the first reduced pressure, the second reduced pressure being less than the atmospheric pressure and greater than the first reduced pressure; and a water vapor discharging step for discharging water vapor by performing a plurality of third roughing steps between a third reduced pressure and a fourth reduced pressure, the third and fourth reduced pressures being less than the first reduced pressure and the third reduced pressure being greater than the fourth reduced pressure, wherein each one of the vaporizing step, the water discharge step and the water vapor discharging step occurs at the melting temperature of at least 273 K. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A water regeneration apparatus for discharging ice condensed in a portion cooled by a cryogenic refrigerator installed in a case to an outside of the case, comprising:
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temperature increasing means for melting the ice into water at approximately atmospheric pressure and at a melting temperature of at least 273 K; vaporizing means for vaporizing the water by performing a plurality of first roughing steps between the approximate atmospheric pressure and a first reduced pressure being less than the atmospheric pressure but higher than and yet close to a water-freezing pressure that causes the water to freeze; water discharge means for discharging water to the outside of the case by performing a plurality of second roughing steps between a second reduced pressure and the first reduced pressure, the second reduced pressure being less than the atmospheric pressure and greater than the first reduced pressure; and water vapor discharging means for discharging water vapor by performing a plurality of third roughing steps between a third reduced pressure and a fourth reduced pressure, the third and fourth reduced pressures being less than the first reduced pressure and the third reduced pressure being greater than the fourth reduced pressure, wherein each one of the vaporizing step, the water discharge step and the water vapor discharging step occurs at the melting temperature of at least 273 K. - View Dependent Claims (11, 12, 13)
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14. A water regeneration method for discharging ice condensed in a portion cooled by a cryogenic refrigerator installed in a case to an outside of the case, comprising:
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a temperature increasing step for melting the ice into water at an approximate atmospheric pressure of approximately 100,000 Pa and at a melting temperature of at least 273 K; after the temperature increasing step, a vaporizing step for vaporizing water by performing a plurality of first roughing steps between the approximate atmospheric pressure of approximately 100,000 Pa and a first reduced pressure of approximately 100 Pa being higher than and yet close to a water-freezing pressure that causes the water to freeze; after the vaporizing step, a water discharge step for discharging water by performing a plurality of second roughing steps between a second reduced pressure of approximately 200 Pa and the first reduced pressure of approximately 100 Pa; and after the water discharge step, a water vapor discharging step for discharging water vapor by performing a plurality of third roughing steps between a third reduced pressure of approximately 15 Pa and a fourth reduced pressure of approximately 10 Pa, wherein each one of the vaporizing step, the water discharge step and the water vapor discharging step occurs at the melting temperature of at least 273 K.
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Specification