Channel type cold end heat exchanger of gas coupling pulse tube refrigerator and implementation method

Abstract

The invention discloses an implementation method for a channel type cold end heat exchanger of a gas coupling pulse tube refrigerator. The channel type cold end heat exchanger comprises a first heat exchanger outer shell, a second heat exchanger outer shell, a first conical slit body, a second conical slit body, a first through hole, a second through hole, a first laminar flow element, a second laminar flow element, a third laminar flow element, a first channel, a second channel and a plug, conical slits are cut in the left heat exchanger outer shell and the right heat exchanger outer shell respectively, and channels are formed in the heat exchangers, so that connection among a first-stage regenerator, a second-stage regenerator and a first-stage pulse tube is achieved. The channel type cold end heat exchanger of the gas coupling pulse tube refrigerator and the implementation method realize efficient matching of front-and-rear-stage cold fingers of the pulse tube refrigerator while maintaining the high-efficiency heat exchange advantage of a traditional heat exchanger, inhibit the backflow, mixed flow and turbulence disturbance of the gas working medium in the heat exchange channel, and ensure the uniformity of gas flow. According to the channel type cold end heat exchanger of the gas coupling pulse tube refrigerator and the implementation method, the heat exchange efficiency and the overall performance of the refrigerating machine are remarkably improved, and the channel type cold end heat exchanger has very positive significance in the aspect of achieving compactness and practicability of the multi-stage pulse tube refrigerating machine.

Description

technical field [0001] The invention belongs to the field of refrigeration and low temperature engineering, relates to a pulse tube refrigerator, in particular to a channel-type cold-end heat exchanger of an air-coupled pulse tube refrigerator and a realization method thereof. Background technique [0002] The pulse tube refrigerator is a major innovation of the regenerative cryogenic refrigerator. It cancels the moving parts of the conventional regenerative refrigerator in the low temperature area, and has the advantages of high reliability, small mechanical vibration, long working life, high refrigeration efficiency, With outstanding advantages such as low electromagnetic noise, it is recognized as a new generation of long-life regenerative cryogenic refrigerators, and has been widely used in aerospace, low-temperature electronics, superconducting industry and low-temperature medical industry. [0003] According to the relationship between the cold accumulator and the puls...

AI Technical Summary

Problems solved by technology

For the U-shaped arrangement of cold fingers, there is also a pressure loss caused by the flow direction of the gas working medium being reversed by 180°, which requires a coherent and compact flow channel structure to reduce the void volume and flow loss

[0010] At present, the cold-end heat exchanger of the conventional gas-coupled pulse tube refrigerator is far from meeting these requirements, and there are still large gaps in related technologies.

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