4K regenerative type low-temperature refrigerating machine and method by adoption of ultrasonic atomization device

A low-temperature refrigerator and atomization device technology, applied in the direction of refrigerators, refrigeration and liquefaction, compressors, etc., can solve pressure enthalpy loss, irreversible heat transfer loss, increased heat conduction loss, exhaustion of cooling capacity in the liquid helium temperature zone, Reduce the expansion rate of liquid helium, etc., to achieve the effects of compact structure, improved refrigeration performance, and reduced pressure enthalpy loss

Inactive Publication Date: 2014-08-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0005] Although helium is an ideal low-temperature refrigerant working fluid, as the temperature zone continues to drop, the pressure enthalpy loss, irreversible heat exchange loss and heat conduction loss in the regenerator in the

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  • 4K regenerative type low-temperature refrigerating machine and method by adoption of ultrasonic atomization device
  • 4K regenerative type low-temperature refrigerating machine and method by adoption of ultrasonic atomization device
  • 4K regenerative type low-temperature refrigerating machine and method by adoption of ultrasonic atomization device

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Embodiment Construction

[0033] figure 1 As shown, the two-stage pulse tube refrigerator using an ultrasonic atomization device includes a pre-cooling stage refrigerator 1, a thermal bridge 6, an ultrasonic atomization device 13, and a regenerative cryogenic refrigerator 7 in a liquid helium temperature zone; wherein the pre-cooling stage Refrigerator 1 includes compressor one 2, primary regenerator 4, primary pulse tube 5, primary inertia tube 9 and primary gas storage 3; wherein the outlet of compressor one 2 is connected to the inlet of primary regenerator 4 , the outlet of the primary pulse tube 5 is connected to the inlet of the primary gas storage 3 through the primary inertia tube 9; the liquid helium temperature zone regenerative cryogenic refrigerator 7 includes a compressor two 8, a secondary regenerator 10, Vessel 14, secondary inertia tube 15 and secondary gas storage 11; wherein the outlet of compressor two 8 is connected to the inlet of secondary regenerator 10, and the outlet of seconda...

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Abstract

The invention relates to a 4K regenerative type low-temperature refrigerating machine by the adoption of an ultrasonic atomization device. The refrigerating machine comprises a first-stage compressor, a liquid helium temperature zone regenerative type low-temperature refrigerating machine body and the ultrasonic atomization device. When a refrigerating working medium (helium-4) is located at a low-temperature zone below 20 K, the performance of the helium-4 is closer to liquid in a condensed state because attraction among molecules is remarkably increased, so that pressure enthalpy loss, irreversible regenerative loss and heat conduction loss in a regenerator are increased rapidly, meanwhile, the expansion efficiency of the helium is reduced, and loss caused by an actual gas effect is gradually increased. Therefore, the key is how to decrease the loss caused by the actual gas effect in order to improve the efficiency of the regenerative type low-temperature pulse tube refrigerating machine at a liquid helium temperature zone. Based on the ultrasonic atomization principle, the ultrasonic atomization device is installed at the liquid helium temperature zone, so that liquid helium is atomized, and the helium works in a state closer to ideal gas. The 4K regenerative type low-temperature refrigerating machine is of great significance for the improvement of refrigeration efficiency at the low-temperature zone.

Description

technical field [0001] The invention relates to a refrigerator, in particular to a liquid helium temperature zone regenerative cryogenic refrigerator using an ultrasonic atomization device. Background technique [0002] The regenerative cryogenic refrigerator is mainly composed of a regenerator, a compressor, a room temperature heat exchanger, a cold end heat exchanger, an expansion mechanism, and a phase adjustment mechanism. Regenerative cryogenic refrigerators have the advantages of simple structure, high reliability, long life, high heat recovery efficiency, and low flow resistance at low temperatures. Therefore, regenerative cryogenic refrigerators have gradually become a research hotspot in the field of cryogenic refrigeration in recent years. [0003] Several common low-temperature regenerative refrigerators include Stirling refrigerators, G-M refrigerators, and pulse tube refrigerators. [0004] In order to obtain excellent refrigeration performance, fluids with sup...

Claims

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Application Information

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IPC IPC(8): F25B9/14
CPCY02P80/15
Inventor 李卓裴夏颖胡沛蒋彦龙
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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