JP5289784B2 - Refrigerator integrated cryogenic container - Google Patents

Description

  The present invention relates to a refrigerator-integrated cryogenic container.

  For example, in Patent Document 1, when a cooled object such as a superconducting magnet is cooled to a very low temperature in a refrigerator, in order to prevent the heat intrusion from room temperature from the purpose of keeping the cooled object at a lower temperature. A refrigerator system in which a low-temperature part of a refrigerator and an object to be cooled are arranged in a vacuum vessel is disclosed.

  Here, when a very small superconducting magnet is cooled to a low temperature, the refrigerator used is very small.

  Here, the example of the refrigerating performance of a refrigerator is shown in FIG. This figure shows the refrigeration performance at the cooling temperature by the refrigerator, using the ambient temperature of the refrigerator, that is, the inlet temperature of helium gas, which is the working medium of the refrigerator during the refrigeration operation, in the environment where the refrigerator is placed. ing. For example, if the amount of heat entering the low temperature part in the vacuum vessel is 0.3 W, the cooling temperature of the refrigerator of the refrigerator system is 48 K when the superconducting magnet cooling temperature is 296 K, If the environmental temperature reaches 318K in summer, it will rise to 55K.

  Here, when the superconducting magnet is composed of a cylindrical yttrium-based oxide bulk superconductor, and this bulk superconductor is magnetized in a high magnetic field to form a superconducting magnet, the strength of the magnetized magnetic field is When the bulk superconductor cooling temperature exceeds 50K, it shows a characteristic of rapidly decreasing. For example, when the diameter of a cylindrical bulk superconductor is 45 mm, the magnetic field strength to be magnetized when the bulk superconductor cooling temperature is 48K is 6 Tesla, but when the bulk superconductor cooling temperature is 55K, The magnetic field strength to be magnetized is reduced to 4 Tesla, and the magnetic field performance of the superconducting magnet is greatly reduced. Once the magnetic field performance is reduced, even if the cooling temperature is lowered to 48K again in this state, the magnetic field strength remains at 4 Tesla and the magnetic field performance remains lowered.

  Conversely, when the environmental temperature drops to 273K in winter, the cooling temperature of the superconducting magnet is 45K, and the magnetic field strength to be magnetized is improved to 6.5 Tesla.

  As described above, for example, in the case of a refrigeration system using adiabatic expansion using helium gas as a working medium, the lower the inlet temperature of the refrigerator, the lower the temperature of the low temperature part of the refrigerator. When the helium gas supplied to the refrigerator is heated to about 353 K by compression heat in the process of being compressed by the compressor, and this heat is exhausted directly or indirectly into the room, the environment in FIG. The temperature may be about 10-20K higher than room temperature.

  Therefore, the inlet temperature of helium gas, which is the working medium of the refrigerator, becomes higher than room temperature, and the cooling temperature by the refrigerator becomes higher than that when the inlet temperature of the refrigerator is lower than room temperature.

  When the inlet temperature of the helium gas is further lowered to lower the freezing temperature of the refrigerator, the helium gas heated with the compression heat is cooled with cooling water having a temperature lower than room temperature, and the inlet temperature of the helium gas is set to room temperature. Lower and supply to refrigerator.

  As disclosed in Patent Document 1, the refrigerator inlet portion is disposed outside the vacuum vessel and exposed to the room temperature portion. When the inlet temperature of the helium gas is lower than the dew point in the room, air is introduced into that portion. The water inside condenses, and the problem is that the condensed water dripping out of the device. In addition, the moisture in the air condenses in the portion, which raises the problem that the inlet temperature of the helium gas refrigerator rises and the cooling temperature of the refrigerator rises.

  On the other hand, as an example of performing temperature control with an electronic device such as a Peltier element without using cooling water, as disclosed in Patent Document 2, it is recovered by an expander in a refrigeration cycle using carbon dioxide as a refrigerant. There is a structure in which heat is exchanged between the radiant heat exchanger on the atmosphere side and the expander outlet using the Peltier element using the motive power.

  Moreover, the structure which dissipates the exhaust heat of the compressor of a refrigerator system with a heat pipe is disclosed by patent document 3, for example. In the case of Patent Document 3, in order to prevent raindrops from entering, the low-temperature part and the high-temperature part of the refrigerator are housed in a sealed housing, a heat pipe heat-dissipating part is provided outside the housing, Are connected to each other by a heat pipe, and the heat of the high temperature part is exhausted to room temperature air in the atmosphere through the working medium in the heat pipe. Therefore, the high temperature part is controlled to a temperature always higher than room temperature. In the case of Patent Document 3 as well, there is no problem of condensation because the temperature-controlled refrigerant is higher than room temperature.

  However, since the inlet temperature of the working medium of the refrigerator becomes higher than room temperature, there arises a problem that the cooling temperature by the refrigerator becomes higher than when the inlet temperature of the refrigerator is lower than room temperature. In addition, since the internal air temperature is constantly higher than room temperature because it is sealed by the housing, a larger heat intrusion occurs at the low temperature part of the refrigerator than at room temperature, and the temperature of the cooling part of the refrigerator is further increased. The problem of rising.

  Furthermore, in the case of patent document 3, when sealing a refrigerator with a housing | casing, since it is necessary to fully insulate the low-temperature part of a refrigerator, a housing | casing becomes large and the volume and weight of the whole refrigerator system become large. Problems arise.

  In addition, instead of sealing with a housing, it is possible to make a structure in which the gap is covered with an adhesive or the like and the gap is filled with an adhesive or the like. It is impossible to prevent this, and there arises a problem that safety cannot be ensured in a place where fire resistance is required.

Japanese Patent Laid-Open No. 11-87131 JP 2004-144399 A JP 2002-181437 A

  Further, in the above prior art, in order to lower the cooling temperature by the refrigerator system, the inlet temperature of helium gas, which is the working medium of the refrigerator, is cooled to a temperature lower than the dew point in the room, and the temperature portion is brought into the atmosphere. When exposed, there is a problem that moisture in the atmosphere aggregates and condenses, and the temperature of the cooled helium gas rises again due to condensation of moisture.

  The object of the present invention is to improve the efficiency of the refrigerator by cooling the temperature at the heat radiating surface of the compressor of the refrigerator used in the refrigerator-integrated cryogenic container capable of cooling the object to be cooled to a cryogenic temperature to room temperature or lower. Controls the inlet temperature of the working medium of the refrigerator to a temperature lower than room temperature without causing condensation on the outer surface of the refrigerator-integrated cryogenic container that can cool the cooling body to a cryogenic temperature. It is to reduce the amount of heat intruding and maintain the cooling temperature by the refrigerator at a low temperature.

  The refrigerator-integrated cryogenic container according to the present invention includes a refrigerator having a first heat absorption part and a first heat dissipation part, and a cooled object that is cooled and held at a very low temperature via the first heat absorption part of the refrigerator. Including a vacuum container for insulating the first heat radiating portion, a second heat absorbing portion for cooling the first heat radiating portion, and a pre-cooling means having a second heat radiating portion. A heat dissipating part and the second heat absorbing part are provided inside the vacuum container, and a part of the heat dissipating means including the second heat dissipating part is exposed to the outside of the vacuum container.

  According to the present invention, the efficiency of the refrigerator is improved by cooling the temperature at the heat radiation surface of the first heat radiation portion of the refrigerator used in the refrigerator-integrated cryogenic container capable of cooling the object to be cooled to a cryogenic temperature to room temperature or lower. At the same time, since the compression part of the refrigerator that is pre-cooled by the pre-cooling means and cooled to a temperature lower than room temperature is arranged in the vacuum space, moisture in the atmosphere does not condense and the electric circuit electrical Can prevent troubles due to static short circuit and problems caused by condensation during transportation.

  The refrigerator-integrated cryogenic container according to the present invention generates cold by using a gas as a working medium and mechanically compressing the working medium, including a first heat radiating part, and adiabatic expansion of the working medium. A refrigerating machine having a first heat absorbing part, and a precooling means for cooling the first heat dissipating part, including a vacuum vessel that heats and cools an object to be cooled and held at a very low temperature by the refrigerating machine The exhaust heat from the preliminary cooling means can be dissipated to the atmosphere.

  A refrigerator-integrated cryogenic container according to the present invention cools the refrigerator inlet temperature of helium gas to a temperature lower than room temperature in order to lower the cooling temperature of the refrigerator-integrated cryogenic container. An isolating means for isolating the freezer inlet from the atmosphere is provided, and a space in the isolating means for isolating the freezer inlet from the atmosphere is configured as a heat insulating space, and a heat conduction medium in the heat insulating space is excluded. It is characterized by.

  Furthermore, the refrigerator-integrated cryogenic container according to the present invention includes precooling means for cooling the inlet temperature of helium gas, which is a working medium of the refrigerator, to a temperature lower than room temperature in the heat insulating space, and the precooling means The high temperature part having a temperature higher than room temperature and the partition wall in contact with the atmosphere constituting the isolation means are thermally connected by a heat transfer member constituted by a member having a high thermal conductivity, and the heat of the high temperature part of the cooling means is obtained. Dissipating heat from the room temperature to the cooling part of the pre-cooling means that cools the inlet temperature of the helium gas refrigerator to a temperature lower than room temperature by radiating heat to the atmosphere through the partition wall at room temperature, and entering the helium gas refrigerator It is characterized by preventing temperature rise.

  In addition, the refrigerator-integrated cryogenic container according to the present invention is configured such that the heat insulation space is configured by a small space by evacuating the heat insulation space, and the heat insulation function is ensured, and the air temperature is reduced by shutting off the air. Even if it becomes high, it does not generate a combustion phenomenon such as ignition, so it has a small size and an excellent fireproof property.

  Examples of the present invention will be described below.

  FIG. 1 is a cross-sectional view of a small superconducting magnet system, which is a bulk superconductor in which an object to be cooled includes a cylindrical yttrium-based Y—Ba—Cu—O composition.

  The refrigerator-integrated cryogenic container according to the present embodiment cools the bulk superconductor as the body to be cooled 1, and is small and light. This refrigerator-integrated cryogenic container incorporates a Stirling refrigerator, which is a cooling means for the object 1 to be cooled, which compresses helium gas as a working medium and adiabatically expands the high-pressure helium gas to generate cold. The cooling unit 2, the compression unit 3, the heat included in the compression unit 3, the precooling stage 4 for exhausting the compression heat of the compression unit 3 to the outside of the refrigerator, and the heat installed in contact with the precooling stage 4 A conductive plate 5; a Peltier element 6 which is a pre-cooling means installed in contact with the cooling surface of the heat conduction plate 5; a heat conduction plate 7 installed in contact with the high temperature exhaust heat surface of the Peltier element 6; 10, a heat conduction plate 9 installed in contact with the inner wall of the vacuum vessel 10, and a heat conduction plate 7 and a copper net 8 installed in contact with the heat conduction plate 9. The precooling stage 4 cools the compression unit 3 by transferring heat generated in the compression unit 3 of the refrigerator together with the heat conduction plate 5 to the cooling surface of the Peltier element 6. Thereby, the high temperature helium gas before expansion | swelling inside the compression part 3 can be cooled.

  Here, the cooling unit 2 of the refrigerator is the first heat absorption unit, the precooling stage 4 included in the compression unit 3 of the refrigerator is the first heat radiating unit, and the cooling surface of the Peltier element 6 that cools the precooling stage 4 is the second. And the high-temperature heat removal surface of the Peltier element 6 are defined as a second heat radiation part, respectively.

  The copper net 8 is a heat transfer member for transmitting the exhaust heat of the Peltier element 6 from the heat conductive plate 7 to the heat conductive plate 9. The heat transfer member is not limited to the copper mesh 8, but may be a member having high thermal conductivity and flexibility, such as a bundle of copper wires, an aluminum mesh or a wire bundle. Here, the flexibility is a requirement for absorbing vibration of the refrigerator and reducing vibration transmitted to the outside of the vacuum vessel 10 and not being destroyed by the vibration of the refrigerator.

  In this embodiment, the heat conducting plate 9 is brought into close contact with the inner wall of the vacuum vessel 10 with bolts 11. As for the vacuum vessel 10, it is desirable to comprise at least the heat radiating surface with a metal having high thermal conductivity such as copper.

  Here, the second heat dissipating part that is the high-temperature exhaust heat surface of the Peltier element 6, the heat conducting plate 7, the copper net 8 that is the heat transfer member, the heat conducting plate 9, and the heat dissipating surface of the vacuum vessel 10 are provided. Also defined as heat dissipation means. The heat radiating means includes a heat conduction plate 7, a copper net 8 that is a heat transfer member, a heat conduction plate 9, and a heat radiating surface of the vacuum vessel 10, excluding a second heat radiating portion that is a high temperature heat removal surface of the Peltier element 6. Of these, one or more or all may be absent. That is, the heat radiating means includes a case where only the second heat radiating portion is configured.

  The high-temperature heat exhaust surface of the Peltier element 6 and the heat conductors 5 and 7 are connected by bolts or soldered via indium sheets or the like (not shown).

  The bulk superconductor 1 is fixed with an adhesive or the like inside a holder 12 formed of aluminum, copper, stainless steel, or the like, which is a material having a function as a reinforcing member and a heat conducting member. The support 13 is made of aluminum or copper having a high thermal conductivity and is connected by screws or the like. The support 13 is attached to the upper part of the support cylindrical body 14 made of epoxy resin containing glass fiber having a low thermal conductivity with an adhesive or the like. The support cylindrical body 14 is fixed to the flange 15 using an adhesive at the bottom, and is fastened to the inner wall of the vacuum vessel 10 with a bolt or the like (not shown).

  Between the support 13 and the cooling unit 2 of the Stirling refrigerator, there are provided heat conductors 16 formed of copper nets or copper strip-like rings having flexibility and high thermal conductivity, Are connected by soldering or the like. Here, the soldering operation can be performed using a soldering iron using the holes 17 provided in the support cylindrical body 14.

  Power is supplied from the power supply unit 18 to the compressor 3 and the Peltier element 6 of the refrigerator through wires 19a and 19b.

  The upper part 20 of the vacuum vessel 10 is formed of an epoxy resin containing glass fiber, for example. The lower portion 110 of the vacuum vessel 10 has a flange 21 integrated by welding or brazing, and the upper portion 20 of the vacuum vessel 10 has a flange 22 integrated with the upper portion 20 of the vacuum vessel 10 by an adhesive. is there. These flanges 21 and 22 are connected by bolts 23 and nuts 24 via O-rings (not shown). Thereby, the airtightness of the vacuum vessel 10 is maintained.

  The compressor 3 of the refrigerator is fixed to a holding plate 25 integrated with the inner wall of the vacuum vessel 10 with a bolt (not shown) through a vibration isolating rubber 33. The space 26 inside the vacuum vessel 10 is evacuated by a vacuum pump 30 from a nozzle 27 through a valve 28 and a pipe 29. Here, the anti-vibration rubber 33 is not limited to rubber, and may be a flexible member for suppressing vibration transmission. Such a member is defined as a vibration-proof member. Note that, for example, activated carbon particles 32 are sealed inside the vacuum vessel 10 to adsorb residual gas such as air in the space 26 to maintain the degree of vacuum.

  The distance between the tip of the cooling unit 2 of the refrigerator and the bottom of the support 13 is different between before and during the operation of the refrigerator due to the influence of thermal deformation or the like, but the cooling unit can be obtained by using a flexible heat conductor 16. 2 and the support 13 can be prevented from acting on a large thermal stress.

  Further, the compression unit 3 of the refrigerator is integrated with a bolt (not shown) on the holding plate 25 integrated with the inner wall of the vacuum vessel 10 through the vibration isolating rubber 33. The compression unit 3 of the Stirling refrigerator has a large vibration during operation, and this vibration propagates directly to the vacuum vessel 10, and the vacuum vessel 10 itself oscillates and generates noise. Therefore, the vibration isolating rubber 33 reduces this vibration. . Further, the vacuum vessel 10 is provided with fins 31 in order to improve the exhaust heat performance.

  In the present embodiment, when the amount of heat intrusion into the extremely low temperature region inside the vacuum vessel 10 is 0.3 W, the compression heat 7 W generated in the compression unit 3 of the refrigerator is exhausted outside the refrigerator. There is a need. When the Peltier element 6 having the capability of generating a temperature difference of 50K with a cooling heat amount of 7 W is applied, the heat conducting plate 5 cooled by the Peltier element 6 is cooled to 273K. At this time, the amount of heat exhausted from the Peltier element 6 is estimated to be 20 W. The temperature of the heat conducting plate 7 in contact with the high temperature heat exhaust surface of the Peltier element 6 is 323 K, and the heat is exhausted through the copper net 8 to the heat radiating surface of the vacuum vessel 10 at room temperature 313 K, which is 10K lower.

  In the above case, the temperature of the precooling stage 4 of the refrigerator installed inside the vacuum vessel 10 is 273K, and the temperature of the bulk superconductor 1 is cooled to about 45K. When the diameter of the cylindrical bulk superconductor 1 is 45 mm, the magnetic field strength to be magnetized when the bulk superconductor cooling temperature is 48K is 6.5 Tesla, which exceeds 6 Tesla.

  In the conventional technology, when the compression heat 7W generated in the compression unit 5 is exhausted at room temperature 313K without using the Peltier element 6, the compression unit 5 is exposed to the outside of the vacuum vessel 10 and exhausted. The area of the surface is narrow, and the temperature of the compression unit 5 is about 318K. Since this is the ambient temperature of the refrigerator, the cooling temperature of the bulk superconductor 1 is 55K, and the strength of the magnetized magnetic field is 4 Tesla.

  In this embodiment, the temperature of the compressor 3 of the refrigerator is pre-cooled by the Peltier element 6 so that the temperature is lower than room temperature, and the bulk superconductor 1 cooled by the refrigerator can be cooled to 50K or less. The magnetic field intensity that can be magnetized can be increased.

  Further, in this embodiment, since the Peltier element 6 for cooling the compression unit 3 of the refrigerator is disposed inside the vacuum vessel 10, moisture in the atmosphere does not condense on the cooling surface of the Peltier element 6, and the dew condensation occurs. It is possible to prevent problems due to electrical short circuits in the electrical circuit and condensed water during transportation.

  Furthermore, since the Peltier element 6 is disposed inside the vacuum vessel 10, the low temperature part of the Peltier element 6 is thermally insulated from the room temperature part. For this reason, the cooling efficiency of the Peltier element 6 is improved, the compression unit 3 of the refrigerator can be cooled to a lower temperature, and the bulk superconductor 1 cooled by the refrigerator can be cooled to 50K or less.

  Further, since the Peltier element 6 is disposed inside the vacuum vessel 10, there is no air layer around the high temperature portion of the Peltier element 6. For this reason, it can suppress that the heat | fever of the high temperature part of the Peltier device 6 is transmitted to the compression part 3 which adjoins via an air layer. For this reason, the compression part 3 of a refrigerator can be cooled to low temperature, and the bulk superconductor 1 cooled with a refrigerator can be cooled to 50K or less. Further, it is possible to provide a superconducting magnet that improves the magnetization performance and generates a higher magnetic field.

  FIG. 2 shows another embodiment according to the present invention. This figure is different from FIG. 1 in that the cooling unit 34 of the refrigerator and the compression unit 35 of the refrigerator are separated and connected by a pipe 36 and a split type Stirling refrigerator is applied. In the present embodiment, the cooling unit 34 of the refrigerator is integrated with the support plate 37, and the compression unit 35 of the refrigerator is integrated with the inner wall of the vacuum vessel 10 through the anti-vibration rubber 33. It fixes to 38 with a volt | bolt etc. (not shown). According to the present embodiment, since the cooling unit 34 and the high-temperature compression unit 35 are separated by a small pipe having a small cross-sectional area of the tube, intrusion heat due to heat conduction from the compression unit 35 to the cooling unit 34 can be reduced. . For this reason, the temperature of the cooling unit 34 can be cooled to a lower temperature, the temperature of the bulk superconductor 1 can be lowered to improve the magnetizing performance, and a superconducting magnet having a higher magnetic field can be provided. In addition, it is possible to reduce the propagation of the operating vibration of the compression portion to the bulk superconductor 1 that is the object to be cooled.

  Even when the split refrigerator is applied, since the Peltier element 6 having a temperature lower than room temperature is disposed inside the vacuum vessel 10, moisture in the atmosphere does not condense on the cooling surface of the Peltier element 6, and dew condensation occurs. It is possible to prevent electrical short circuit of the electrical circuit due to and trouble caused by dew condensation during transportation.

  FIG. 3 shows another embodiment according to the present invention. This figure is different from FIG. 1 in that a fan 39 is provided at the bottom of the vacuum vessel 10. Power is supplied to the fan 39 from the power source 18 through the wiring 19c, and air is blown to the fins 31. Thereby, the heat dissipation characteristic in the fin 31 can be improved.

  According to the present embodiment, since the heat dissipation characteristics of the fins 31 are improved by the operation of the fan 39, the temperature of the heat conducting plate 7 is further lowered, and thereby the temperature of the heat conducting plate 5 is also lowered. Thereby, the temperature of the cooling unit 34 of the refrigerator is further lowered, the temperature of the bulk superconductor 1 is lowered, the magnetization performance is improved, and a superconducting magnet that generates a higher magnetic field can be provided.

  In the above embodiment, a case where a Stirling refrigerator is applied as a refrigerator for cooling an object to be cooled has been described. However, as a refrigerator, a Gifford McMahon refrigerator, a pulse tube refrigerator, a thermoacoustic refrigerator, etc. Even if other refrigerators are applied, the same effect can be obtained.

  In this embodiment, the case where the bulk superconductor is cooled as the body to be cooled has been described. However, the present invention can also be applied to the case where the body to be cooled is a cell sample or a protein sample. In this case, a cryogenic container having a structure in which one end is opened to the atmosphere so that a sample to be stored at a low temperature can be taken in and out is desirable. Also in this case, the temperature of the inlet of the helium gas can be cooled to room temperature or lower by the preliminary cooling means, the temperature of the cryogenic container can be further lowered, and the same effect can be obtained that no condensation occurs on the cooling surface of the preliminary cooling means. Can do.

  In the above embodiment, the entire Peltier element 6 serving as the pre-cooling means is installed inside the sink container 10, but only the cooling surface of the Peltier element 6 serving as the second heat absorbing part is installed inside the vacuum container 10. The high temperature heat exhaust surface of the Peltier element 6 that is the second heat radiating portion may be exposed to the outside of the vacuum vessel 10. Also in this case, the temperature of the pre-cooling stage 4 that is the first heat radiating section can be set to the indoor dew point or less, and the generation of condensed water can be reduced.

  According to the present invention, the efficiency of the refrigerator is improved by cooling the temperature at the heat radiation surface of the first heat radiation part of the refrigerator used in the refrigerator-integrated cryogenic container capable of cooling the object to be cooled to a cryogenic temperature to room temperature or lower. be able to.

  In addition, according to the present invention, since the compression unit of the refrigerator that is pre-cooled by the pre-cooling means and cooled at a temperature lower than the room temperature is disposed in the vacuum space, moisture in the atmosphere is not condensed, Troubles of electrical short circuits in electrical circuits due to condensation and problems due to condensation during transportation can be prevented. In addition, according to the present invention, the helium gas temperature at the refrigerator inlet can always be kept lower than room temperature, so that the object to be cooled cooled by the refrigerator can be cooled to a lower temperature.

  Moreover, according to this invention, since there is no oxygen in a vacuum heat insulation container, it is excellent in fireproofing property and can ensure the safety | security in the place where fireproofing is required.

It is a schematic sectional drawing which shows the structure of the refrigerator integrated cryogenic container of Example 1 by this invention. It is a schematic sectional drawing which shows the structure of the refrigerator integrated cryogenic container of Example 2 by this invention. It is a schematic sectional drawing which shows the structure of the refrigerator integrated cryogenic container of Example 3 by this invention. It is a graph explaining the freezing characteristic of the refrigerator used in the Example by this invention.

Explanation of symbols

  1: Bulk superconductor, 2: Cooling unit, 3: Compression unit, 5: Thermal conductive plate, 6: Peltier element, 7: Thermal conductive plate, 8: Copper net, 9: Thermal conductive plate, 10: Vacuum container, 14 : Support cylindrical body, 25: holding plate.

Claims (5)

A refrigerator having a first heat-absorbing part and a compression part including the first heat-dissipating part;
A vacuum vessel for heat-insulating the object to be cooled, which is cooled and held at a very low temperature via the first heat absorption part of the refrigerator;
A second heat absorbing part for cooling the first heat radiating part, and a pre-cooling means having a second heat radiating part,
The refrigerator, gas and the working medium, said compression unit is adapted to mechanically compress the working medium, provided with the refrigerator and the second heat absorbing part inside the vacuum container, wherein A refrigerator-integrated cryogenic container, wherein a part of the heat radiation means including the second heat radiation part is exposed to the outside of the vacuum container. Cryogenic container with the built-in refrigerator according to claim 1, wherein said heat dissipating means is characterized in that it comprises a heat transfer member. The refrigerator-integrated cryogenic container according to claim 1 or 2 , wherein the preliminary cooling means is a Peltier element. Cryogenic container with the built-in refrigerator according to claim 2 or 3, characterized in that they have installed vibration isolating member between the inner wall of the vacuum container and the compression unit. The refrigerator-integrated cryogenic container according to any one of claims 2 to 4 , wherein the first heat absorption part and the compression part are connected by a thin tube.

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