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Dewar cold loss testing tool and device

A technology for testing tooling and tooling, applied in measuring devices, measuring heat, calorimeters, etc., can solve problems such as low test accuracy, and achieve the effect of improving accuracy and reducing cooling loss

Pending Publication Date: 2022-06-21
安徽光智科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a Dewar cold damage test tool and device, which solves the technical problem of low test accuracy of the existing method of obtaining Dewar cold damage by using the liquid nitrogen weighing method

Method used

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  • Dewar cold loss testing tool and device
  • Dewar cold loss testing tool and device
  • Dewar cold loss testing tool and device

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Embodiment Construction

[0027] The embodiments of the present invention provide a Dewar cold damage test tool and device, which are used to solve the technical problem of low test accuracy of the existing method of obtaining the Dewar cold damage by using the liquid nitrogen weighing method.

[0028] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, but 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 shall fall within the protection scope of the present invention.

[0029] The invention provides a Dewar cold damage test tool.

[0...

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Abstract

The invention relates to the technical field of low-temperature and vacuum engineering, and discloses a Dewar cold loss testing tool and device. The Dewar cold loss test tool comprises a heat insulation cover and a tool base, the top of the tool base is provided with a mounting groove used for mounting a tested Dewar, the outer wall of the tool base is provided with a first connecting part, the bottom of the heat insulation cover is provided with a second connecting part connected with the first connecting part in a matched mode, and the top of the heat insulation cover is provided with a liquid nitrogen injection channel. The liquid nitrogen injection channel is communicated with an outer cavity of the detected Dewar mounted in the mounting groove; during testing, the tool can be used for installing a tested Dewar flask, the tested Dewar flask is placed on a precise weighing instrument, and the upper computer determines the cold loss amount of the tested Dewar flask by using a weighing method. According to the invention, the Dewar is isolated from the external hot air flow through the tool, so that the loss of cold energy outside the Dewar can be reduced, and unnecessary cold energy loss is avoided, thereby improving the precision of the Dewar cold loss test.

Description

technical field [0001] The invention relates to the technical field of low temperature and vacuum engineering, in particular to a Dewar cold damage test tool and device. Background technique [0002] Dewars are an important part of cryogenic detectors and are used to provide a cryogenic vacuum environment for infrared chips. In order to ensure the accuracy of infrared detection, cryogenic detectors need a Dewar with a high degree of vacuum, and one of the indicators to measure the vacuum degree of a Dewar is the cold loss of the Dewar. [0003] In the prior art, the liquid nitrogen weighing method is used to obtain the cold loss of the Dewar. It places the Dewar on a precision electronic scale for weighing, then injects liquid nitrogen into the outer cavity of the Dewar, obtains the curve of liquid nitrogen mass and time in real time, and then calculates the dewar's cooling loss. However, when liquid nitrogen is injected into the Dewar by this method, the heat exchange lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K17/00
CPCG01K17/00
Inventor 戚武江潘可
Owner 安徽光智科技有限公司