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Cool end heat exchanger of pulse tube refrigerator

A technology of cold end heat exchanger and pulse tube refrigerator, applied in the direction of refrigerator, indirect heat exchanger, heat exchanger type, etc., can solve the problem of insufficient heat exchange area of ​​cold end heat exchanger and poor performance of the whole refrigerator. Improve and other problems, to achieve the effect of simple structure, convenient assembly, and increased heat exchange area

Inactive Publication Date: 2009-07-01
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In conventional pulse tube refrigerators, due to the insufficient heat transfer area of ​​the cold end heat exchanger, it is difficult for the working medium gas to flow into the pulse tube evenly and laminarly, so that the overall performance of the refrigerator cannot be improved.

Method used

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  • Cool end heat exchanger of pulse tube refrigerator

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Effect test

Embodiment

[0013] Such as figure 1 As shown, the present invention is made up of cold head (2), cold cap (3), cold cap deflector (4), wire mesh packing (5), heat exchanger (6). The cold cap deflector is put into the cold cap cavity, and its tapered end is supported on the bottom of the cold cap cavity. After the cold cap is combined with the cold cap deflector, the wire mesh filler filled in the heat exchanger is tightened and tightly fitted with the heat exchanger. The cold cap is placed in the cold head cavity to ensure that the bottom surface of the cold cap is closely attached to the bottom surface of the cold head inner cavity. The cold head and the regenerator (1) are welded and sealed as a whole, and the heat exchanger and the pulse tube (7) are connected by a tight fit.

[0014] The cold air flow from the cold end of the regenerator 1 passes through the annular gap formed by the inner wall of the cold head 2 and the outer wall of the cold cap 3 and the heat exchanger 6, and ent...

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Abstract

The invention discloses a coaxial pulse-tube refrigerator combined type cold end heat exchanger, belonging to the gas heat exchanging cryogenic technical field. The invention is composed of a cold junction, a cold cap, a cold cap flow guider, a silk net stuffing and a heat exchanger. The cold cap flow guider is of umbrella-shaped structure and is arranged in a cold cap cavity to form an airflow stabilizing cavity. The silk net stuffing stuffed in the heat exchanger is supported tightly by the cold cap and the cold cap flow guider, and the cold cap and the cold cap flow guider are matched with the heat exchanger closely. The bottom surface of the cold cap is attached to the cold junction inner cavity bottom surface closely, the outer wall surfaces of the cold cap and the heat exchanger and the cold junction inner cavity surface form an annular clearance channel. The invention has simple structure, convenient assembling, improves heat exchanging area and heat exchanging coefficient, stabilizes the flow state of the airflow, can be used for multiple types of coaxial pulse-tube refrigerators and other refrigerating and heat exchanging apparatuses.

Description

technical field [0001] The invention belongs to the field of gas heat exchange and low temperature technology, and in particular relates to a cold-end heat exchange device for coaxial pulse tube refrigerators, which can be used in long-life coaxial pulse tube refrigerators in the fields of aerospace and military affairs. Background technique [0002] The pulse tube refrigerator is a low-temperature refrigerator developed in the 1960s and 1970s. It has many advantages such as no vibration at the cold end and simple structure, and is used in various fields such as civil and military applications. The coaxial pulse tube refrigerator proposed on top of the basic pulse tube refrigerator, because the regenerator and the pulse tube are coaxially arranged inside and outside, its structure is simple and small, and it is suitable for the development of practical applications. It is very popular in the process of practical application of refrigerators. [0003] When the pulse tube ref...

Claims

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Application Information

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IPC IPC(8): F25B39/00F25B9/14F28D17/00
Inventor 朱恩宝王小军
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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