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Temperature fluctuation suppression device

A technology for suppressing device and temperature fluctuations, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc. It can solve the problems of helium tanks and thermal resistance plate temperature fluctuation suppression, complex assembly, heat leakage of pipelines, and existence of welding joints, etc. Achieve the effect of simple structure, prevent heat leakage and reduce vibration

Active Publication Date: 2021-03-26
河南工学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For G-M refrigerators in the 20K temperature range, most of them use helium tanks and thermal resistors, but there are some disadvantages in the helium tanks and thermal resistors: 1. The temperature fluctuation suppression assembly of the helium tanks and thermal resistors is complicated, and there are welding problems. 2. An external gas supply is required, and the pipeline connected to helium will cause heat leakage. Therefore, the present invention proposes a temperature fluctuation suppression device to solve the above-mentioned problems

Method used

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Embodiment 1

[0031] refer to Figure 1-Figure 5 , a temperature fluctuation suppressing device, comprising a G-M refrigerator cold head 1, a G-M refrigerator 17, a data acquisition and temperature control system 16 and a vacuum unit 18, the bottom of the G-M refrigerator cold head 1 is sequentially provided with a primary cold head 3 and the secondary cold head 4, three thin-wall supports 2 are arranged at the bottom of the G-M refrigerator cold head 1 in a circular equidistant manner, and the bottom ends of the three thin-wall supports 2 are fixedly connected to the same lead cold storage unit 6, The lead cold storage unit 6 includes a brass 10 and a lead block 8, the top of the lead block 8 is in contact with the bottom of the secondary cold head 4, the brass 10 is wrapped on the outer wall of the lead block 8, and the bottom of the brass 10 A sample holder 9 is fixedly connected, the bottom of the sample holder 9 is fixedly installed with a first radiation screen 13, the bottom of the s...

Embodiment 2

[0043] When using a rhodium-iron thermometer to test, the temperature fluctuation of the secondary cold head 4 in the G-M refrigerator 17 for temperature control of the present invention and the temperature of the secondary cold head 4 in the G-M refrigerator 17 for temperature control of the present invention are not used. Fluctuation size, test results such as Image 6 shown, from Image 6 It can be seen from the figure that the original temperature fluctuation of the secondary cold head 4 is within ±300mK, and the temperature fluctuation measured by the rhodium-iron thermometer after temperature control is within ±3mK, achieving the purpose of effectively suppressing the temperature and verifying that the lead cold storage unit 6 Control the performance of suppressing temperature fluctuations.

[0044] The results measured with a cernox thermometer are as follows Figure 7 As shown, the temperature fluctuation measured by the Cernox thermometer is within ± 0.45mK, and the...

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Abstract

The invention discloses a temperature fluctuation suppression device. The device comprises a G-M refrigerator cold head, a G-M refrigerator, a data acquisition and temperature control system and a vacuum unit, wherein the G-M refrigerator cold head comprises a first-stage cold head and a second-stage cold head. The device is characterized in that three thin-wall supports are annularly arranged atthe bottom of the G-M refrigerator cold head at equal intervals, the bottom ends of the three thin-wall supports are fixedly connected with the same lead cold accumulation unit, the lead cold accumulation unit comprises brass and a lead block, the top of the lead block makes contact with the bottom of the second-stage cold head, and the brass wraps the outer wall of the lead block. The device canachieve the equivalent temperature suppression effect without using a high-pressure helium tank; and moreover, the structure of the device is simpler than a structure comprising a helium tank withoutthe need for an external helium tank and other objects, so that the operability, reliability and safety of a whole system are improved, and possible heat leakage is prevented.

Description

technical field [0001] The invention relates to the technical field of temperature fluctuation suppression, in particular to a temperature fluctuation suppression device. Background technique [0002] Compared with other cooling methods, direct cooling of single photon detectors by refrigerators has many advantages. The direct cooling method of refrigerators has a simple structure, no cryogenic liquid, easy to move and use outdoors, low operation and maintenance costs, etc. made it widely used. However, its obvious disadvantage is that the temperature fluctuates greatly, which limits the further application of this type of temperature suppression unit. [0003] With the use of magnetic cold storage materials in cryogenic regenerators, the cold storage efficiency of cryogenic regenerators at extremely low temperatures has been improved, which makes the lowest temperature of G-M refrigerators reach below 2K. In recent years, due to the use of magnetic packing, the G-M refrig...

Claims

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Application Information

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IPC IPC(8): F25B9/14F25B49/00
CPCF25B9/14F25B49/00F25B2309/14
Inventor 孔春辉韩佩佩常成徐文博董娜花少震宋娟
Owner 河南工学院
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