Cryogenic container with built-in refrigerator

Abstract

A cryogenic container with a built-in refrigerator according to the present invention comprises the refrigerator having a first heat absorbing part and a first heat dissipating part, a vacuum vessel for containing and thermally insulating an object to be cooled while holding the object at a cryogenic temperature through the first heat absorbing part of the refrigerator, and a pre-cooling unit having a second heat absorbing part and a second heat dissipating part for cooling the first heat dissipating part, wherein the first heat dissipating part and the second heat absorbing part are arranged inside the vacuum vessel, and a part of a heat dissipating unit including the second heat dissipating part is exposed outside the vacuum vessel. According to the present invention, in the cryogenic container with the built-in refrigerator capable of cooling the object to be cooled to the cryogenic temperature, the refrigerator efficiency can be improved by cooling a heat dissipating surface of the first heat dissipating part of the refrigerator to a level lower than the room temperature.

1 . A cryogenic container with a built-in refrigerator comprising:
 the refrigerator having a first heat absorbing part and a first heat dissipating part;   a vacuum vessel for containing and thermally insulating an object to be cooled while holding the object at a cryogenic temperature through the first heat absorbing part of the refrigerator; and   a pre-cooling unit having a second heat absorbing part and a second heat dissipating part for cooling the first heat dissipating part;   wherein the first heat dissipating part and the second heat absorbing part are arranged inside the vacuum vessel, and a part of a heat dissipating unit including the second heat dissipating part is exposed outside the vacuum vessel.   
   
   
       2 . The cryogenic container with the built-in refrigerator according to  claim 1 , wherein the refrigerator uses a gas as a cooling medium and has a compressing part for mechanically compressing the cooling medium; and the compressing part includes the first heat dissipating part. 
   
   
       3 . The cryogenic container with the built-in refrigerator according to  claim 1 , wherein the heat dissipating unit includes a thermally conductive member. 
   
   
       4 . The cryogenic container with the built-in refrigerator according to  claim 1 , wherein the pre-cooling unit comprises a Peltier element. 
   
   
       5 . The cryogenic container with the built-in refrigerator according to  claim 1 , wherein a vibration isolating member is arranged between the compressing part and an inner wall of the vacuum vessel. 
   
   
       6 . The cryogenic container with the built-in refrigerator according to  claim 1 , wherein the first heat absorbing part and the compressing part are connected by a tube.