| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cool storage type refrigerator in which a flow of operative gas in a cool storage unit is improved to enable cold storage material to be effectively used.SOLUTION: A double-stage type GM refrigerator 1 comprises a circular plate 6 acting as operative gas guiding member placed at a low temperature end part 311 in a space in a first cool storage unit 31, arranged at the end part of filling space (a first filling space 31a) of a first cool storage material 33 so as to guide operative gas in the first filling space 31a to a first low temperature side communicating passage 314. The circular plate 6 is formed with a plurality of grooves 61 arranged radially in a radial direction of the first cool storage unit 31 in which each of the grooves is extended from the radial inner part of the first cool storage unit 31 to the radial outer part of it. The plurality of grooves 61 are constituted in such a way that their radial outer ends are communicated with the first low temperature side communication passage 314 and continuously opened into the first filling space 31a along its extending direction.</p> |
