Cryogenic refrigerator
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The liquid nitrogen low temperature system adopts the method of evacuation and decompression to reduce the liquid nitrogen temperature, and can provide the sample with subcooled liquid nitrogen as low as 65K. The system is equipped with pressure stabilization equipment to reduce the pressure fluctuation of the supercooled liquid nitrogen Dewar and improve the pressure fluctuation. Sample temperature stability is suitable for low temperature materials requiring extra-large cooling, such as high temperature superconducting tape cooling.
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Specification |
Performance parameter |
Index |
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Effective net cooling capacity |
0~1 kW@70K can be adjusted freely |
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Circulating liquid nitrogen outlet temperature |
65~77K can be adjusted freely |
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Liquid nitrogen temperature measurement error |
≤0.1 K |
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Liquid nitrogen temperature stability |
≤0.1 K |
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Circulating liquid nitrogen absolute pressure |
0.2～1 MPa Adjustable within this range |
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Circulating liquid nitrogen pressure measurement error |
≤10 kPa |
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Circulating liquid nitrogen pressure stability |
±10 kPa |
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Measurement error of liquid nitrogen pressure in subcooler |
≤1 kPa |
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Liquid nitrogen position measurement range |
0～1.5 m |
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Liquid nitrogen flow |
0~12 L/min adjustable in this range |
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Liquid nitrogen flow measurement error |
≤5 % |
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Liquid nitrogen circulation pipeline bearing load |
1 MPa |
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Specification |
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Standard Specification |
Optional Specification |
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Gas-liquid separation Dewar, subcooled liquid nitrogen Dewar |
Vacuum system |
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Circulating liquid nitrogen Dewar, evacuation decompression system |
Cryocooler |
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Liquid nitrogen pump, coil heat exchanger |
Chiller |
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Temperature control system, data acquisition control cabinet |
Dewar volume |
CSIC Pride（Nanjing）Cryogenic Technology Co., Ltd.
