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Compact type liquid-helium-free 1K low-temperature refrigeration device suitable for ultrahigh vacuum environment

A refrigeration device and ultra-high vacuum technology, used in refrigerators, refrigeration and liquefaction, lighting and heating equipment, etc., can solve the problems of increased size, cost and heat leakage, reduce the surface area, shorten the cooling time, and improve the exchange rate. The effect of thermal efficiency

Active Publication Date: 2017-03-22
FERMION INSTR SHANGHAI CO LTD
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Problems solved by technology

However, the additional variable flow control system will lead to an increase in the size, cost and heat leakage of the entire system

Method used

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  • Compact type liquid-helium-free 1K low-temperature refrigeration device suitable for ultrahigh vacuum environment
  • Compact type liquid-helium-free 1K low-temperature refrigeration device suitable for ultrahigh vacuum environment
  • Compact type liquid-helium-free 1K low-temperature refrigeration device suitable for ultrahigh vacuum environment

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Embodiment Construction

[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0055] In a specific embodiment, combining image 3 , Figure 4 , Figure 7 as well as Figure 8 , a compact liquid-free helium 1K low-temperature refrigeration device suitable for ultra-high vacuum environments, including a gas delivery pipe 1, a pre-cooling end 2, a protective cover 3, a decompression pool 4, and an air extraction device 5; Gas end 11, pre-cooling heat exchange section 12, reflux heat exchange section 13 and gas outlet 14; said protective cove...

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Abstract

The invention provides a compact type liquid-helium-free 1K low-temperature refrigeration device suitable for ultrahigh vacuum environment. The device comprises a gas conveying pipe, a pre-cooling end, a protection cover, a pressure reduction pool and an air exhaust device. The device has the beneficial effects that firstly, the protection cover reduces the surface area of a refrigeration machine exposed in a vacuum cavity and can be used for the ultrahigh vacuum environment; secondly, the protection cover serves as a backflow channel of refrigeration working media, conductance of the backflow channel is improved, it is ensured that liquid refrigeration working media in the pressure reduction pool have the low vapour pressure, and the lower refrigeration temperature is achieved; thirdly, at the initial cooling stage, the backflow channel can be inflated with helium exchange gas so as to rapidly cool the portion of the pressure reduction pool, and the cooling time is shortened; fourthly, due to design of the second segment of the protection cover, the whole heat exchange efficiency is improved; fifthly, the refrigeration device has the beneficial effects of being compact in structure, easy to demount, mount and maintain, adjustable in refrigeration amount and the like.

Description

technical field [0001] The invention relates to the field of low-temperature refrigeration devices, in particular to a refrigeration device that can generate 1K low temperature and is suitable for ultra-high vacuum environments. Background technique [0002] Cryogenics and vacuum technology are two extreme experimental techniques that are essential in modern science. With the development of science and technology, extremely low temperature and ultra-high vacuum have become two disciplines that combine and penetrate each other. Since many scientific research instruments need to meet extreme experimental conditions such as extremely low temperature and ultra-high vacuum at the same time, this puts forward higher requirements for small refrigerators: lower refrigeration temperature and compatibility with ultra-high vacuum systems. [0003] The small Gifford-McMahon cryocooler (Gifford–McMahon Cryocooler, hereinafter referred to as "GM cryocooler") that has been commercialized ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/14
CPCF25B9/14
Inventor 董金奎谢英英赵嘉峰欧宏炜
Owner FERMION INSTR SHANGHAI CO LTD
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