Secondary intermediate heat exchanger for thermal coupling coaxial two-stage pulse pipe refrigerator and design method

A technology of intermediate heat exchanger and pulse tube refrigerator, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve problems such as large flow loss, and achieve the promotion of performance improvement, efficient heat exchange, and avoidance of invalid void volume. Effect

CN106642822AInactive Publication Date: 2017-05-10SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-05-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a secondary intermediate heat exchanger for a thermal coupling coaxial two-stage pulse pipe refrigerator and a design method. The heat exchanger is of a structure which is machined through a hollow high-heat-conductivity material and is approximate to a column shape, and conical slit bodies are arranged in the middle. The slit bodies are of trapezoidal fin structures arranged on the circumference uniformly. The inner hole diameter of each slit body is equal to the diameter of a pulse pipe, the outer diameter of the upper end of each slit body is equal to the inner diameter of a regenerator of the low-temperature section, and the outer diameter of the lower end of each slit body is equal to the inner diameter of a regenerator of the high-temperature section. According to the secondary intermediate heat exchanger, conical slits are uniformly machined in the portions of unequal diameters, maximization of the heat exchange area in the limit size is achieved, the machining manner transits naturally from the large-diameter end to the small-diameter end, and the flow loss is minimized. The secondary intermediate heat exchanger can effectively improve the overall performance of the thermal coupling coaxial two-stage pulse pipe refrigerator.
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Description

Technical field

[0001] The invention relates to a two-stage pulse tube refrigerator, in particular to a two-stage intermediate heat exchanger of a thermally coupled coaxial type two-stage pulse tube refrigerator and a design method. Background technique

[0002] The pulse tube refrigerator in the 20-50K temperature zone generally adopts a two-stage structure. The airflow of the first-stage cold finger and the second-stage cold finger of the thermally coupled two-stage pulse tube refrigerator is independent of each other, and can be driven by the same compressor or by two The compressors are driven separately, and the cooling capacity of the primary cold finger is transferred to the intermediate heat exchanger in the middle section of the secondary cold finger through the thermal bridge to pre-cool the secondary cold finger and also provide external cooling capacity. The cold finger working gas is reheated through the high-temperature section regenerator, the intermediate heat exc...

Examples

Embodiment Construction

[0027] The specific implementation of the present invention will be further described in detail below in conjunction with the drawings and embodiments. In the description of the present invention, it should be noted that the terms "center", "radial", "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. indicate orientation or The positional relationship is based on the positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the specific orientation, construction and operation in a specific orientation that the pointed device or element must have, and therefore cannot be understood To limit the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwi...