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High vacuum low temperature thermostat using low temperature leak flexible connecting structure

A cryostat, flexible connection technology, applied in heat exchanger sealing devices, irreversible cycle compressors, heat exchange equipment, etc., to reduce axial heat leakage, reduce contact thermal resistance, and increase thermal conductivity.

Inactive Publication Date: 2007-03-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the traditional solution using refrigerant for cooling, the non-refrigerant solution also brings a new problem, that is, how to efficiently transfer the cold energy of the cryogenic refrigerator to the object to be cooled, which not only has to overcome the rigid connection that causes The mechanical stress problem, and in terms of structural installation, the object to be cooled is required to allow a certain degree of freedom of movement

Method used

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  • High vacuum low temperature thermostat using low temperature leak flexible connecting structure
  • High vacuum low temperature thermostat using low temperature leak flexible connecting structure
  • High vacuum low temperature thermostat using low temperature leak flexible connecting structure

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Embodiment Construction

[0011] In order to achieve the purpose of low heat leakage, the present invention adopts three schemes in terms of vacuum jacket, that is, thin-walled stainless steel tube, corrugated tube and folded sleeve. The thin-walled tube solution (Fig. 1-3a) is to increase the heat conduction resistance through the thin-walled tube, while the common point of the corrugated tube (Fig. 2-3b) and the folded sleeve (Fig. 3-3c) is to increase the heat conduction path to achieve The purpose of reducing axial heat leakage. The latter two solutions are more suitable for occasions where the cooling temperature is relatively low, because at this time, reducing heat leakage and effectively utilizing the cooling capacity of the refrigerator are the key problems to be solved in the system. At the same time, since the contact thermal resistance between the cold head and the heat sink and between the heat sink and the object to be cooled will lead to an increase in the temperature difference between ...

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Abstract

The invention discloses a high vacuum low temperature thermostat using low heat leakage flexible connection structure, including refrigerator fixing flange whose outside is fixed with extine of the top by bolted construction and inside is melted and fixed by bellows, in thermostat, vacuum jacket, upper heat sink, lower heat sink and flexible connection structure are installed under the refrigerator fixing flange. Its advantage include: vacuum jacket has property of low heat leakage by using folding bush and other types; stainless steel bellows in fixed structure can eliminate mechanical vibration caused by low temperature refrigerator operation; mechanical yaw between agent of refrigerator and cooled substance is allowed by flexible connection structure; additional indium slice between agent of refrigerator and heat sink, heat sink and cooled substance can decrease thermal contact resistance between connecting fitting and effective refrigerating capacity loss.

Description

technical field [0001] The invention relates to a high-vacuum low-temperature thermostat adopting a flexible connection structure with low heat leakage. Background technique [0002] Many applications (such as the cooling of the vacuum environment simulation chamber) need to provide a low-temperature environment. In the past, the low-temperature liquid was used to flow through the coil coiled on the object to be cooled to achieve cooling purposes. The operation is complex, and additional liquefaction equipment or cryogenic storage tanks are required to provide a large amount of cryogenic liquid. The treatment of the evaporated gas after heat exchange is also a difficult problem. For example, the high price and safety issues of cryogenic gas require the installation of gas recovery device, which in turn will greatly increase the complexity of the system. In this context, refrigerant-free solutions using direct cooling with cryogenic refrigerators have become more and more wi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F11/00F25B1/00
Inventor 陈国邦金滔
Owner ZHEJIANG UNIV
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