Device for recondensation by means of cyrogenerator of low-boiling gases of gas evaporating from liquid gas container
A low-temperature generator, liquefied gas technology, applied in domestic refrigeration equipment, geometry/arrangement/dimension of container construction, refrigeration and liquefaction, etc.
Inactive Publication Date: 2006-08-09
KARLSRUHE FORSCHZENT
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[0018] figure 2 The schematic construction of the cold head of the two-stage pulse tube cooler and its assembly into the cryostat is shown. The pulse tube cooler and its components are represented by standard components only. The two-stage cooler comprises a heat accumulator 21 with a connection 35 to a compressor as shown and which supplies a pulsed gas flow. The pressure typically varies between about 10 bar and 25 bar. The gas flow is branched at the other end of the heat accumulator 21 so that a first branch gas flow is fed to the first impulse tube 23 via a first heat transfer device 25 . At its opposite end, a second gas flow is fed through a pipe connection 34 . When this air flow is properly sized and properly timed, cooling occurs in the area of the heat spreader 25 . With this cooling power, the radiation shield 4 is cooled to a first temperature level which is already significantly lower than the ambient temperature. In order to thermally couple the radiatio...
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The invention relates to a device for the recondensation by means of a cryogenerator of low-boiling gases of the gas evaporating from a liquid gas container. The inventive device comprises one or at least two continuous cooling stages, the so-called cold top. Every stage is a pulse tube cooler whose heat transfer between the regenerator and the pertaining pulse tube is embedded in an exposed cold surface. The entire cold top is flanged only on the outer recipient of the device and projects into the interior in the neck tube of the device. The last cold surface of the cold top is located at the end of the neck tube and is exposed in the vapor room above the liquid gas cold bath. The other cold surfaces are opposite a heat transfer ring mounted on the neck tube. The respective opposite front faces engage with each other without contacting each other in any place while forming a gap so that a free passage is guaranteed from the vapor room via the liquid gas bath to the flange of the cold top in the neck tube. The two components regenerator, pulse tube of every pulsed tube cooling stage are covered with a heat shield that can be a poorly thermoconductive covering only resting thereon or an annular vacuum chamber whose outer wall contacts the sheathing component only in certain positions or only across short distances in a linear manner.
Description
technical field [0001] The present invention relates to a device for recondensing boiling-prone gases in gas evaporated from a liquefied gas container by means of a low-temperature generator. With this device, for example, a superconducting magnet cooled by immersion in liquid helium as liquefied gas can be operated continuously by means of a small refrigeration device connected to the system, a so-called cryocooler. Accordingly, in the case of a superconducting magnet made of a high-temperature superconducting material, the magnet is accordingly cooled by immersion in liquid helium. Background technique [0002] The current state of the art is briefly described as follows: (see also Figure 4 ) [0003] The entire cryogenic vessel 1 consists of an inner vessel 2 which is filled up to level 7 with a boilable liquefied gas, such as liquid helium. The superconducting structure and generally an excitation coil 5 with feed lines 6a, 6b are immersed in the liquefied gas. The h...
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IPC IPC(8): H01F6/04F25B9/14F17C3/08F17C13/00F25B9/00F17C13/08F25B9/10F25D19/00H01L39/04
CPCF25B2309/1406F17C13/086F25B2309/1408F17C2203/03F17C2221/035F25B9/10F25B2309/1421F17C2227/0337F25D19/006F17C2223/0161F17C2223/0153F25B2400/17F25B9/145F17C2201/0119
Inventor A·霍夫曼
Owner KARLSRUHE FORSCHZENT