| 摘要 |
<p>PURPOSE:To reduce the inflow of heat and the loss of a refrigerant by providing a low temperature thermostatic chamber to accomodate a computer for low temperature actuation with a preparatory chamber through an opening/closing shutter to charge/discharge the computer. CONSTITUTION:A double structure is formed with metal or glass and Dewar bottles 2, 3 are dualized so that the space between the Dewar bottles 2, 3 is evacuated. Subsequently, liquid nitrogen 4 is injected into the space between the Dewar bottles 2, 3 and liquid herium 5 is injected into the inside of the Dewar bottle 3. The upper part of the Dewar bottle 3 is provided to the preparatory chamber 8, which is separated from the lower part through the shutter 9. After closing the shutter 9, a computer is incorporated into the preparatory room 8 and the preparatory room 8 is preliminarily cooled by a vacuum pump 12 and a liquid nitrogen bomb 15. Subsequently the preparatory chamber 8 is evacuated by a vacuum pump 12, a valve 23 is opened to fill the preparatory room 8 with herium gas and then the shutter 9 is opened to move the computer 25 from the position shown by a dotted line to a position shown by an alternate long and short dash line. Then the shutter 9 and the valve 23 are closed successively and a valve 11 is opened to exhaust gas from the chamber 8. A liquefying machine 19 is used for liquefaction of gasified herium. Thus the loss of the liquid herium is saved and the charge/discharge of the computer is made possible.</p> |
