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Vacuum cooling case

A vacuum and cold box technology, which is applied in the direction of color/spectral characteristic measurement, etc., can solve problems such as radial vibration and impact, reduced strength and stiffness, and fracture, so as to reduce stress, reduce wall thickness, and reduce cooling loss Effect

Inactive Publication Date: 2004-04-07
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

For this reason, thin-walled tubes with low thermal conductivity materials can be used to make the cantilever. The thinner the tube wall, the smaller the heat conduction and cold loss, but it reduces its strength and stiffness, and it is easy to cause radial vibration and impact. The root of the wall pipe will break due to stress concentration

Method used

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Embodiment Construction

[0017] The present invention is described in detail in conjunction with accompanying drawing now.

[0018] See figure 1 with figure 2 As shown, the vacuum cold box of the present invention includes a box body 3 , a cold platform 1 and a cantilever 2 . The front of the box body 1 is equipped with a light-through window composed of a window frame flange 8 and an infrared window 9, and a sealing ring 10 is arranged therebetween for vacuum sealing and fixed with screws. The light signal enters through the light-through window and is detected by the infrared detector 12 placed on the cold platform 1 . The rear wall of the box body 3 is a sealed cable plate 4 with output pins 5, which is fixed on the box body 3 by screws. The rear end of the cantilever 2 is fixed on the sealed cable plate 4, and the front end suspended in the box body 3 fixes the cold platform 1. The cantilever 2 is a thin-walled tube of low thermal conductivity material, its two ends are closed, and the inside...

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Abstract

The vacuum cooling case includes case, cooling platform and cantilever; and features the cantilever of low heat conductivity thin wall pipe; position limiting sleeve around the cantilever and micro annular interval between the cantilever and the position limiting sleeve. The present invention solves the technological problems related to lowering the heat conducting cold consumption of the cantilever and raising the resistance to radial vibration and shock of the cantilever.

Description

Technical field: [0001] This invention relates to cooling, in particular to vacuum cold boxes for infrared detector storage and cryogenic operation. Background technique: [0002] The infrared detector works at low temperature, which can reduce its internal thermal noise and improve the detector sensitivity, responsivity and signal-to-noise ratio. To this end, the highly sensitive infrared detectors all use vacuum interlayer Dewar containers or vacuum cold boxes to provide a low-temperature working environment. Moreover, many effective technical solutions have been proposed for the vibration problem of the refrigerator that affects the work of the infrared detector. The infrared detector is fixed on the cold platform of the vacuum cold box, and the cold platform is supported in the box space by a cantilever fixed on the rear wall of the box. In order to reduce the cooling loss on the cold platform as much as possible, the cantilever should not only have sufficient strength...

Claims

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Application Information

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IPC IPC(8): G01N21/35
Inventor 纪国林刘晓华许妙根
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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