| CPC F25B 9/10 (2013.01) [F25B 9/14 (2013.01); H01F 6/04 (2013.01)] | 11 Claims |
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1. A cooling container that contains a first cooling object and a second cooling object for which a target cooling temperature lower than that of the first cooling object is set, the cooling container configured to support a refrigerator including a cylinder, a displacer inserted into the cylinder reciprocably and detachably from the cylinder, and a drive unit that reciprocates the displacer to generate cold heat, the displacer and the cylinder constituting a first-stage cold head having a first operation temperature and a second-stage cold head having a second operation temperature lower than the first operation temperature and aligned axially with the first-stage cold head, to allow the first cooling object and the second cooling object to be cooled by the first-stage cold head and the second-stage cold head, respectively, the cooling container comprising:
a container body that contains the first cooling object and the second cooling object while keeping a vacuum state;
a first cooling target terminal that is disposed in the container body while being heat-transferably connected to the first cooling object, the first cooling target terminal having a first cooling target surface that is opened upward;
a second cooling target terminal that is disposed in the container body while being heat-transferably connected to the second object and being raiseable and lowerable, the second cooling target terminal having a second cooling target surface that is opened upward at a position below the first cooling target surface;
a cylinder holder supported by the container body so as to be raiseable and lowerable with the cylinder while holding the cylinder in a posture where a lower surface of the first-stage cold head and a lower surface of the second-stage cold head are vertically opposed to the first cooling target surface and the second cooling target surface, respectively;
a holder seal part interposed between the container body and the cylinder holder to hermetically seal the container body while allowing the cylinder holder to be raised and lowered relatively to the container body;
a second raising and lowering mechanism connected to the cylinder holder to raise and lower the cylinder holder between a second heat-transfer position where the lower surface of the second-stage cold head comes in contact with the second cooling target surface to allow heat-transfer between the second-stage cold head and the second cooling target terminal and a second cut-off position where the lower surface of the second-stage cold head is separated upward from the second cooling target surface to cut off the heat-transfer between the second-stage cold head and the second cooling target terminal; and
a first raising and lowering mechanism connected to the first cooling target terminal to raise and lower the first cooling target terminal between a first heat-transfer position where the first cooling target surface comes in contact with the lower surface of the first-stage cold head which is located at a height position corresponding to the second heat-transfer position to allow heat-transfer between the first-stage cold head and the first cooling target terminal and a first cut-off position where the first cooling target surface is separated downward from the lower surface of the first-stage cold head to cut off the heat-transfer between the first-stage cold head and the first cooling target terminal.
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