PURPOSE: To operate a refrigerating cycle in a high efficiency without increasing its size.
CONSTITUTION: A plurality of cylindrical inner tanks 71A, 71B, 71C are circumferentially arranged in a cylindrical outer tank 72, and refrigerant is supplied from a J-T expansion valve 39 arranged on one end of the tank 72. The refrigerant is supplied toward a central space enclosed by the tanks 71A, 71B, 71C to indirectly cool materials to be cooled in the tanks 71A, 71B, 71C. Fins 82 which radially externally protrude are formed on the surfaces of the tanks 71A, 71B, 71C. The fins 82 are so formed in protruding amounts at a part of a central space side that those disposed at positions separate farther from the valve 39 are more in number. Accordingly, the tanks 71A, 71B, 71C are uniformly cooled from one end to the other of the tank 72 and held at uniform temperatures.
ARIGA HIDEKI
SHIIMADO TOSHIHIRO
ITO YOSHIHISA
HORI KOJI
