초록 ▼

A cryogenic refrigeration system for cooling specimen, wherein an expander having one or more heat stations and a cooler at a main refrigeration circuit, which has a specimen mounting unit and is cooled at a temperature lower than the heat station, are housed in first and second vacuum chambers sepa

A cryogenic refrigeration system for cooling specimen, wherein an expander having one or more heat stations and a cooler at a main refrigeration circuit, which has a specimen mounting unit and is cooled at a temperature lower than the heat station, are housed in first and second vacuum chambers separate from each other, and at the second vacuum chamber is provided an open-close lid which is open to enable a specimen to be taken in or out, whereby the second vacuum chamber only is broken of its vacuum so as to enable the specimen to be exchanged.

대표청구항 ▼

A cryogenic refrigeration system for cooling and holding a specimen operated at the cryogenic level, provided with; (a) an expander having one or more heat stations and generating coldness by expanding a refrigerant gas, said heat stations being cooled by said coldness and held at a predetermined te

A cryogenic refrigeration system for cooling and holding a specimen operated at the cryogenic level, provided with; (a) an expander having one or more heat stations and generating coldness by expanding a refrigerant gas, said heat stations being cooled by said coldness and held at a predetermined temperature level; (b) a main refrigeration circuit including a refrigeration stage having a specimen mounting unit for mounting thereon said specimen and cooling said specimen mounted on said specimen mounting unit and a heat exchanger for said refrigerant gas obtaining the coldness from said heat stations of said expander, said refrigerant gas obtaining the coldness from said heat stations being transferred to said refrigeration stage so as to cool said refrigeration stage at the cryogenic level, said specimen mounted on said specimen mounting unit being held at the cryogenic level; (c) a first vacuum chamber housing therein said expander, and (d) a second vacuum chamber housing therein said refrigeration stage and specimen mounting unit at said main refrigeration circuit, being separate from said first vacuum chamber, and provided with an open-close lid which is open to enable said specimen to be taken in or out with respect to said specimen mounting unit.