Integrated tapered slit cold-end heat exchanger of linear pulse tube refrigerator and manufacturing method

A technology of pulse tube refrigerator and cold end heat exchanger, which is applied in refrigerators, gas circulation refrigerators, refrigeration and liquefaction, etc., can solve the problems of lower refrigeration efficiency, large flow loss of air flow, large flow loss, etc., and achieve thermal Effects of minimizing resistance loss, promoting performance improvement, and minimizing flow loss
CN103017394AActive Publication Date: 2013-04-03SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
Publication Date
2013-04-03

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Abstract

The invention discloses an integrated tapered cold-end heat exchanger for a linear pulse tube refrigerator and a manufacturing method. The heat exchanger mainly comprises a shell, a tapered slit body and a T-shaped guide core column, wherein the shell is a main heat-dispersing surface and a coupled interface, protects the tapered slit body and the T-shaped guide core column and is connected with a regenerator and a pulse tube; the tapered slit body is cut inside the shell by a low-speed wire cutting technology; the T-shaped guide core column is arranged in the center; and a core column slit is cut on the guide core column. According to the heat exchanger, the heat exchanging area is maximized within a limited volume by uniformly cutting the tapered slit in unequal diameters; the cutting way makes a natural transition from a large diameter end to a small diameter end; the thermal resistance and flow loss are minimized; and the gas in the pulse tube is laminarized without an additional gas director. The heat exchanger greatly improves the performance of the whole linear pulse tube refrigerator and is very significant to the practicality of the linear pulse tube refrigerator, aerospace application and other aspects.
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Description

technical field

[0001] The invention relates to a pulse tube refrigerator, in particular to an integrated tapered slit cold end heat exchanger of a linear pulse tube refrigerator and a manufacturing method thereof. Background technique

[0002] The pulse tube refrigerator is a major innovation of the regenerative cryogenic refrigerator. It cancels the cold-end ejector widely used in conventional regenerative low-temperature refrigerators (such as Stirling or G-M refrigerators), and uses the operation of the hot-end phasing mechanism to realize the phase difference required for refrigeration. The complete cancellation of moving parts at the cold end has achieved low vibration, low interference and no wear at the cold end; and through a series of important improvements in structure and phase adjustment methods, in some typical temperature regions, its actual efficiency has reached the regenerative type Highest value among cryogenic refrigerators. These remarkable advantages ...

Claims

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