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US 4,790,147 AGranted
Helium cooling apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsToru Kuriyama, Ryuichi Hakamada
Life of this patent
Estimating the term…
Abstract
A helium cooling apparatus includes a liquid helium container which stores liquid helium and a condensation chamber incorporating a condensation heat exchanger for condensing a gas helium into liquid helium. A transfer tube allows the liquid helium container to communicate with the condensation chamber. The transfer tube has a gas flow path and a liquid helium flow path independently thereof. When the liquid helium in the liquid helium container is evaporated into gas helium, the gas helium is guided to the condensation chamber through the gas helium flow path. The gas helium is condensed by a condensation heat exchanger into liquid helium. The liquid helium is guided to the liquid helium container through the liquid helium flow path.
Claims15
A helium cooling apparatus comprising:
- (a) a liquid helium container which, in use, stores liquid helium;
- (b) a condensation chamber incorporating a condensation heat exchanger for condensing gas helium into liquid helium;
- and
- (c) a transfer tube for allowing said liquid helium container to communicate with said condensation chamber, said transfer tube including a gas helium flow path and a liquid helium flow path that is independent of said gas helium flow path,
- wherein:
- (d), when the liquid helium in said liquid helium container is evaporated into gas helium, the gas helium is supplied to said condensation chamber through said gas helium flow path and is condensed by said condensation heat exchanger into liquid helium and the liquid helium is guided to said liquid helium container through said liquid helium flow path and
- (e) the ratio of (cross-sectional area of the gas helium flow path)/[(cross-sectional area of the gas helium flow path)+(cross-sectional area of the liquid helium flow path)] is between 0.15 and 0.85.
4 more elements
A helium cooling apparatus comprising:
- (a) a liquid helium container which, in use, stores liquid helium;
- (b) a condensation chamber incorporating a condensation heat exchanger from condensing gas helium into liquid helium;
- (c) a transfer tube for allowing said liquid helium container to communicate with said condensation chamber, said transfer tube including:
- (i) an inner tube having an upper end portion open to said condensation chamber and a lower end portion open to said liquid helium container and
- (ii) an outer tube having a diameter larger than said inner tube, surrounding said inner tube, and having an upper end portion open to said condensation chamber and a lower end portion open to said liquid helium container;
- (d) gas helium guiding means for separating the gas helium evaporated in said liquid helium container from the liquid helium and guiding the gas helium to an internal space of said inner tube, in order to define the internal space of said inner tube as a gas helium flow path;
- and
- (e) liquid helium guiding means for separating the liquid helium condensed in said condensation chamber from the gas helium and for guiding the liquid helium to a space between said inner and outer tubes, in order to define the space between said inner and outer tubes as a liquid helium flow path, so that, when the liquid helium in said liquid helium container is evaporated into gas helium, the gas helium is guided to said condensation chamber through the internal space of said inner tube and condensed by said condensation heat exchanger into liquid helium, and the liquid helium is guided to said liquid helium container through the space between said inner and outer tubes,
- (f) wherein the ratio of (cross-sectional area of the gas helium flow path)/[(cross-sectional area of the gas helium flow path)+(cross-sectional area of the liquid helium flow path)] is between 0.15 and 0.85.
6 more elements
A helium cooling apparatus comprising:
- (a) a liquid helium container which, in use, stores liquid helium;
- (b) a condensation chamber incorporating a condensation heat exchanger for condensing gas helium into liquid helium;
- (c) a transfer tube for allowing said liquid helium container to communicate with said condensation chamber, said transfer tube including:
- (i) an inner tube having an upper end portion open to said condensation chamber and a lower end portion open to said liquid helium container and
- ((ii) an outer tube having a diameter larger than said inner tube, surrounding said inner tube, and having an upper end portion open to said condensation chamber and a lower end portion open to said liquid helium container;
- (d) gas helium guiding means for separating the gas helium evaporated in said liquid helium container from the liquid helium and for guiding the gas helium to a space between said inner and outer tubes, in order to define the surface between said inner and outer tubes as a gas helium flow path;
- and
- (e) liquid helium guiding means for separating the liquid helium condensed in said condensation chamber from the gas helium and for guiding the liquid helium to an internal space of said inner tube, in order to define the internal space of said inner tube as a liquid helium flow path, so that the liquid helium in said liquid helium container is evaporated into gas helium, the gas helium is guided to said condensation chamber through the space between said inner and outer tubes and condensed by said condensation heat exchanger into liquid helium, and the liquid helium is guided to said liquid helium container through the internal space of said inner tube,
- (f) wherein the ratio of (cross-sectional area of the gas helium flow path)/[(cross-sectional area of the gas helium flow path)+(cross-sectional area of the liquid helium flow path)] is between 0.15 and 0.85.
6 more elements
Dependencies are inferred from the claim text.