A Rack and Pulse Tube Free Piston Stirling Refrigerator

A refrigerator, free technology, used in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of dissipation and low efficiency of pulse tube refrigerators, reduce the quality of the whole machine, eliminate pump gas losses, reduce The effect of making difficulty

Active Publication Date: 2020-04-03
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The reason why the efficiency of the pulse tube refrigerator is lower than that of the Stirling refrigerator is mainly because the pulse tube refrigerator does not have a structure such as the expansion piston of the Stirling refrigerator, which "feeds back" the expansion work of the gas to the compression chamber. The expansion work of the hot end is mainly dissipated to the environment in the form of heat through phase-modulating mechanisms such as inertial tubes and small holes, resulting in low efficiency of pulse tube refrigerators

Method used

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  • A Rack and Pulse Tube Free Piston Stirling Refrigerator
  • A Rack and Pulse Tube Free Piston Stirling Refrigerator
  • A Rack and Pulse Tube Free Piston Stirling Refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 1 As shown, the coaxial pulse tube type free-piston Stirling refrigerator includes a linear motor 1 , a compression unit, an expander unit, an undamped dynamic vibration absorption unit 4 , a frame 50 , and a casing 60 .

[0037] Such as figure 2 , 3 , 4 and 5, the frame 50 includes a flange 52, a piston tube 51 and a base 53 arranged in the flange 52,

[0038] Wherein, the flange 52 is in the shape of a disk, and a concentric small disk 521 is arranged on one side of the flange, and a plurality of connecting through holes are uniformly arranged on the flange 52 .

[0039] The base 53 is cylindrical, one end is connected to one side of the flange 52, and the other end is a free end. The centerline of the base 53 coincides with the centerline of the flange 52. The free end of the base 53 is provided with a plurality of connecting screw holes 531 , in an embodiment, the base 53 is four legs arranged around the centerline of the flange 52 .

[0040]The ...

Embodiment 2

[0056] Such as Figure 7 As shown, the coaxial pulse tube type free-piston Stirling refrigerator includes a linear motor 1 , a compression unit, an expander unit, an undamped dynamic vibration absorption unit 4 , a frame 50B, and a casing 60 .

[0057] Such as Figure 8 , 9 , 10, the frame 50B includes a flange 52B, an expansion piston tube 51B, a compression piston tube 54B and a base 53B,

[0058] Wherein, the flange 52B is in the shape of a disk, one side of the flange 52B is provided with a concentric disk 521B, and the other side is connected to the base 53B, and the flange 52B is uniformly provided with a plurality of connection through holes.

[0059] The base 53B is cylindrical, one end is connected to the flange 52B, and the other end is a free end. The centerline of the base 53B coincides with the centerline of the flange 52B. A plurality of connecting screw holes 531B are arranged on the free end of the base 53B. Embodiment Among them, the base 53B is four legs a...

Embodiment 3

[0081] The other structure of this embodiment is the same as that of Embodiment 2, except that it also includes a deflector 32B arranged at one end of the pulse tube 31B and inside the pulse tube 31B, and the deflector 32B is connected with the cold end heat exchanger 24B.

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PUM

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Abstract

According to the frame and pulse tube type free-piston Stirling refrigerator of the present invention, the frame includes a flange, an expansion piston tube, a compression piston tube and a base, and the expansion piston tube is a straight tube, one end of which is connected with a disc, and the other end is a The free end is used to connect the pulse tube of the refrigerator. The expansion piston tube has a cylindrical heat exchange cavity and a cylindrical expansion piston cavity. The heat exchange cavity is connected to the pulse tube, and the pulse tube, heat exchange cavity and expansion piston cavity are coaxial And connected to each other, the compression piston tube is a straight tube, set in the base, one end is connected with the flange, the other end is a free end, the compression piston tube has a cylindrical compression piston chamber, the compression piston chamber and the expansion piston chamber are coaxial and connected parallel to the axis of the compression piston chamber, the disc is provided with a plurality of through holes connecting the compression piston chamber and the outside, the inner diameter of the compression piston chamber is larger than the inner diameter of the expansion piston chamber, and the inner diameter of the expansion piston chamber is larger than the inner diameter of the heat exchange chamber. The inner diameter of the heat exchange cavity is the same as that of the pulse tube.

Description

technical field [0001] The invention belongs to the field of refrigeration, and in particular relates to a rack and pulse tube type free-piston Stirling refrigerator. Background technique [0002] As an important method to obtain low temperature, cryogenic refrigerator refrigeration is widely used in the fields of aviation, military, superconductivity, communication, electronics, metallurgy, industrial gas liquefaction, and biomedicine. Especially in recent years, the vigorous development of my country's aerospace industry has made the application requirements of cryogenic refrigerators in aerospace more and more obvious. [0003] GLACIER (General Laboratory Active Cryogenic ISS Experiment Refrigerator) is the first -80°C low-temperature storage device developed by NASA that can be used on two platforms of the space station and the spacecraft at the same time. It is refrigerated by a free-piston Stirling refrigerator. Realize refrigeration temperature from 4°C to -95°C; in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/14F25B41/06F25B39/00F25B41/30
CPCF25B9/14F25B39/00F25B41/31
Inventor 陈曦何韩军朋文涛杨文量霍晴舟杨巨沁刘旭
Owner UNIV OF SHANGHAI FOR SCI & TECH
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