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Extremely low temperature cold head evaporator capable of inhibiting anti-gravity climbing of superfluid helium liquid film

An evaporator and anti-gravity technology, applied in the direction of evaporator/condenser, refrigerator, refrigeration components, etc., can solve the problems of insufficient cooling capacity, unstable cold head temperature, insufficient stability of the refrigeration system, etc., to ensure pressure and temperature, effects of achieving independence

Pending Publication Date: 2022-07-15
上海铂钺制冷科技有限公司
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Problems solved by technology

[0004] However, the current extremely low temperature cold head evaporator is not yet able to meet the requirements of scientific experiments and engineering applications due to its insufficient performance.
For example, the temperature of the cold head is unstable, the cooling capacity is insufficient, the stability of the refrigeration system is insufficient, etc.

Method used

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  • Extremely low temperature cold head evaporator capable of inhibiting anti-gravity climbing of superfluid helium liquid film
  • Extremely low temperature cold head evaporator capable of inhibiting anti-gravity climbing of superfluid helium liquid film
  • Extremely low temperature cold head evaporator capable of inhibiting anti-gravity climbing of superfluid helium liquid film

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Embodiment Construction

[0047] In the following description, numerous technical details are set forth in order to provide the reader with a better understanding of the present application. However, those of ordinary skill in the art can understand that even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized.

[0048] Some innovative points of the embodiments of the present application are briefly described below:

[0049] The inventors of the present application have found through long-term and in-depth research that the technical problems in the prior art, such as unstable cold head temperature, insufficient cooling capacity, and insufficient stability of the refrigeration system, are inherently related to the following reasons.

[0050] First, the existing cryogenic cold head evaporators cannot effectively suppress the antigravity climb of the superfluid helium liquid fi...

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Abstract

The invention relates to the technical field of superfluid helium low-temperature throttling refrigerators, and discloses an extremely-low-temperature cold head evaporator capable of inhibiting anti-gravity climbing of a superfluid helium liquid film, which comprises a base, an evaporator main body, a top cover, a first connecting pipe, a second connecting pipe and a porous sintering interlayer, according to the ultra-low-temperature cold head evaporator, conventional liquid helium and super-flow liquid helium are separated through the porous sintering interlayer, the temperature before throttling can be effectively controlled through the top cover with the good heat insulation effect and the special structural design of the top cover, anti-gravity climbing of a super-flow helium liquid film can be restrained, and therefore the stability of the pressure and the temperature in the ultra-low-temperature cold head evaporator is guaranteed, and the service life of the ultra-low-temperature cold head evaporator is prolonged. And the device has very positive significance in practical application of the extremely low temperature throttling refrigerating machine working in the superfluid helium temperature region.

Description

technical field [0001] The present application relates to the field of refrigeration and cryogenic engineering, and in particular, to the technical field of superfluid helium cryogenic throttling refrigerators. Background technique [0002] The low-temperature throttling refrigerator in the superfluid helium temperature region utilizes the depressurization and cooling effect produced by the throttling of the helium working medium to obtain the temperature below the superfluid transition point (2.17K) and below. Since there are no moving parts at the low temperature end, it has the characteristics of no vibration and high reliability, which makes superfluid helium cryogenic throttling refrigerators become a hot research topic in the research of cryogenic refrigerators in recent years. It has a wide range of applications in guiding physics and so on. [0003] It should be pointed out that for the very low temperature cold head evaporator, it is an important device for generat...

Claims

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Application Information

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IPC IPC(8): F25B9/00F25B39/02
CPCF25B9/002F25B39/02
Inventor 党海政张涛
Owner 上海铂钺制冷科技有限公司
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