Pulse tube refrigerator and flow guide structure thereof

A pulse tube refrigerator and pulse tube technology, applied in refrigerators, gas cycle refrigerators, refrigeration components, etc., can solve problems such as poor diversion effect, and achieve low resistance loss, uniform airflow, and improved cooling capacity. Effect

Active Publication Date: 2015-11-11
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a diversion s

Method used

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  • Pulse tube refrigerator and flow guide structure thereof
  • Pulse tube refrigerator and flow guide structure thereof
  • Pulse tube refrigerator and flow guide structure thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1

[0032] Such as Figure 2-5 As shown, in addition to the existing cold end connecting tube 4, the pulse tube 6, and the inertial tube 7, the diversion structure of the pulse tube refrigerator of the present invention also includes a first diversion layer 501 and a first diversion layer 501 located in the pulse tube 6. Two diversion layer 502. Preferably, the first flow guiding layer 501 and the second flow guiding layer 502 are made of uniform porous materials; the first flow guiding layer 501 and the second flow guiding layer 502 may be 40 mesh silk The mesh material may have a thickness of about 3 mm. In order to achieve a good cooling effect, the thickness of the second air guiding layer 502 is generally greater than the thickness of the first air guiding layer 501. Because the wire mesh of the guide layer is relatively thin and soft, in order to prevent the wire mesh from being deformed under the action of the airflow and affecting the diversion effect, pre...

Example Embodiment

[0036] Example 2

[0037] Such as Figure 6-7 As shown, in addition to the existing cold end connecting tube 4, the pulse tube 6, and the inertial tube 7, the diversion structure of the pulse tube refrigerator of the present invention also includes a first diversion layer 501 and a first diversion layer 501 located in the pulse tube 6. Two diversion layer 502. Preferably, the first air guiding layer 501 and the second air guiding layer 502 are made of uniform porous materials, and the thickness of the second air guiding layer 502 is generally greater than the thickness of the first air guiding layer 501. The first air guiding layer 501 and the second air guiding layer 502 can be made of fiber mat material with lower resistance, and the thickness can be increased to about 5mm. After the fiber mat is sintered at high temperature, the fiber webs have been bonded to each other Together, they have greater rigidity, so no brackets are needed to fix them, making the structure simpler....

Example Embodiment

[0039] Example 3

[0040] The present invention also provides a pulse tube refrigerator, including a main radiator 1, a regenerator 2, a cold end heat exchanger 3, and an air storage 8, and also includes the pulse tube refrigerator described in the above embodiment 1 or 2. Stream structure.

[0041] By adopting the diversion structure of the present invention, the resistance loss in the diversion process is small, the diversion effect is greatly improved, the air flow in the pulse tube is uniform, and the refrigeration capacity of the refrigerator is greatly increased.

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PUM

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Abstract

The invention relates to a flow guide structure of a pulse tube refrigerator. The flow guide structure comprises a cold-end connecting tube, a pulse tube and an inertia tube, and further comprises a first flow guide layer and a second flow guide layer which are located in the pulse tube, a first transition cavity connecting the first flow guide layer with the cold-end connecting tube, a second transition cavity connecting the second flow guide layer with the inertia tube, a first retaining piece located in the first transition cavity and/or a second retaining piece located in the second transition cavity. By adopting the flow guide structure of the pulse tube refrigerator, in the flow guide process, the resistance loss is few, the flow guide effect is greatly improved, air flow in the pulse tube flows evenly, and therefore the refrigeration capacity of the refrigerator is significantly improved.

Description

technical field [0001] The invention relates to the field of refrigerators, in particular to a pulse tube refrigerator and a flow guiding structure thereof. Background technique [0002] The pulse tube refrigerator has no moving parts in the cold head, has the advantages of simple structure, stable operation, and reliable performance. It is a low-temperature refrigerator with great development potential. At present, Stirling-type pulse tube refrigerators have been successfully applied to many fields such as infrared detectors, superconducting filters, and strong electric superconductivity. In existing pulse tube refrigerators, there is usually a sudden change in cross-section, that is, a sudden change in the flow area of ​​the flow channel. On both sides of these abrupt cross-sections, whether the flow in the large channel is uniform has a significant impact on the performance of the refrigerator, while whether the flow in the small channel is uniform or not has little effe...

Claims

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Application Information

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IPC IPC(8): F25B9/14F25B41/00F25B41/40
CPCF25B9/145F25B2309/1414F25B41/40
Inventor 胡剑英张祥镇张丽敏罗二仓
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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