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High-efficiency vas refrigerating machine

A pulse tube refrigerator, high-efficiency technology, applied in refrigerators, refrigeration and liquefaction, compressors, etc., can solve the problem of low efficiency of pulse tube refrigerators

Inactive Publication Date: 2011-08-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency pulse tube refrigerator for the very low efficiency of the existing pulse tube refrigerator and to overcome the deficiencies of the prior art

Method used

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Embodiment Construction

[0013] According to the difference of refrigeration temperature, the present invention adjusts the pressure at the inlet of the pulse tube by adding a tapered nozzle or a gradually expanding diffuser nozzle between the cold end heat exchanger of the regenerator and the pulse tube, thereby increasing the isentropy Coefficient of expansion , so that the expansion is more sufficient, and the purpose of improving the efficiency of the pulse tube refrigerator is realized.

[0014] Such as figure 1 As shown, a high-efficiency pulse tube refrigerator with a nozzle that uses a convergent nozzle and works below the 6K temperature range includes a compressor 1, a transfer pipe 2, a regenerator hot end heat exchanger 3, and a regenerator connected in sequence. 4, regenerator cold end heat exchanger 5, convergent nozzle 6, cold end flow channel 7, pulse tube 8, pulse tube hot end heat exchanger 9, inertia tube 10 and gas storage 11.

[0015] Such as figure 2 As shown, the high-effici...

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Abstract

The invention discloses a high-efficiency vas refrigerating machine. The high-efficiency vas refrigerating machine comprises a compressor, a transmission tube, a heat regenerator hot end heat exchanger, a heat regenerator, a heat regenerator cold end heat exchanger, a decompression spray pipe, a cold end flow passage, a vas, a vas hot end heat exchanger, an inertia tube and an air reservoir which are connected in sequence. According to the different working temperature zones of the vas refrigerating machine (6K is taken as a limit), a tapered spray pipe (The refrigerating temperature is below 6K) or a gradually-expanding diffuser pipe (The refrigerating temperature is above 6K) is connected between the heat regenerator cold end heat exchanger and the vas to correspondingly reduce or improve the pressure of an expansion gas working medium at a cold end inlet of the vas, thereby increasing the constant-entropy expansion coefficients and finally improving the efficiency of the vas refrigerating machine.

Description

technical field [0001] The invention relates to a regenerative low-temperature refrigerator, in particular to a high-efficiency pulse tube refrigerator. Background technique [0002] Low-temperature refrigeration technology has effectively promoted the progress of science and technology for a long time, and has been widely used in military, medical, aerospace, superconducting and other fields. Mechanical low-temperature refrigerator is the most mainstream technology in low-temperature refrigeration technology. Its cooling temperature range has covered all low-temperature temperature ranges above 4K. Among the many types of low-temperature refrigerators, pulse tube refrigerators have no moving parts at the cold end. It has the advantages of simple structure, low cost, small mechanical vibration and long life, and has the prospect of being widely used in military, medical, aerospace and other fields, thus becoming a research hotspot. However, due to a series of factors such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/14
Inventor 王博王龙一袁园甘智华
Owner ZHEJIANG UNIV
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