Multifunctional low-temperature scroll plate pre-cooling heat exchanger

Abstract

The invention discloses a multifunctional low-temperature scroll plate pre-cooling heat exchanger. The multifunctional low-temperature scroll plate pre-cooling heat exchanger includes an intermediateslit structure, a threaded hole, a spiral groove, a U-shaped groove, a fixing hole and a temperature measuring and heating threaded hole. The heat exchanger is applied to a pre-cooling unit of a pre-cooling type JT refrigerator for a liquid helium temperature zone and a room temperature zone. The heat exchanger can not only directly replace a cold head of a pre-cooler, but also can be used as a supporting bottom plate of a cold screen. The intermediate slit structure increases the heat exchange area, so that the pre-cooling efficiency is greatly improved. The spiral groove is in interference fit with a high-pressure pipeline to pre-cool high-pressure and high-temperature helium. The surface of the heat exchanger is plated with a micron-level thin gold layer to reduce radiation leakage heatloss. The U-shaped groove facilitates the arrangement of pipelines and wires, and can further be used as heat sink of the wires from the liquid helium temperature zone to the room temperature zone. The multiple functions of the cold head of the pre-cooler, the support of the cold screen, the pre-cooling of high-pressure fluid and the heat sink of the wires are integrated, the structure is compact, the contact thermal resistance between the pre-cooler and the heat exchanger is reduced, the pre-cooling effect of a refrigerator is enhanced, and the pre-cooling efficiency is improved.

Description

technical field [0001] The invention belongs to the field of low-temperature heat exchange, and in particular relates to a low-temperature vortex coil pre-cooling heat exchanger integrating multiple functions of pre-cooler cold head heat exchange, cold screen support, high-pressure fluid pre-cooling and wire heat sink. Background technique [0002] With the rapid development of aerospace technology, the requirements for space probes are constantly increasing. In order to improve the sensitivity and observation accuracy of detectors, some detectors and their associated electronic equipment need to work in a stable and reliable liquid helium temperature zone or a lower mK-level low-temperature environment. The refrigeration technology in the space liquid helium temperature zone mainly includes liquid helium Dewar technology and J-T refrigeration technology. Among them, although the liquid helium Dewar technology is relatively mature, its service life is limited by the amount ...

AI Technical Summary

Problems solved by technology

Among them, although the liquid helium Dewar technology is relatively mature, its service life is limited by the amount of liquid helium it carries, and the launch cost is relatively high.

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