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A Rack and Pulse Tube Free Piston Stirling Refrigerator

A refrigerator, free technology, applied in refrigerators, gas cycle refrigerators, refrigeration and liquefaction, etc., can solve the problem of low efficiency of pulse tube refrigerators, eliminate pump gas loss, reduce manufacturing difficulty, and reduce the overall machine quality effect

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

[0008] 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 the phase modulation mechanism such as the inertial tube and the gas store, resulting in low efficiency of the pulse tube refrigerator

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

[0037] 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 absorbing unit 4, a frame 50, and a housing 60.

[0038] Such as figure 2 , 3 , 4, 5, the frame 50 includes a flange 52, a piston tube 51 arranged in the flange 52, and a base 53,

[0039] Wherein, the flange 52 is in the shape of a disc, one side of the flange is also provided with a concentric small disc 521, and a plurality of connecting through holes are uniformly provided on the flange 52.

[0040] 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 center line of the base 53 coincides with the center line of the flange 52, and the free end of the base 53 is provided with multiple connecting screw holes. In the embodiment, the base 53 is four legs surrounding the center line of the flange 52.

[0041] The piston tube 51 is a str...

Embodiment 2

[0065] 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 absorbing unit 4, a frame 50B, and a housing 60.

[0066] 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,

[0067] The flange 52B is in the shape of a disc. One side of the flange 52B is provided with a concentric disc 521B, and the other side is connected to the base 53B. The flange 52B is evenly provided with a plurality of connecting through holes.

[0068] The base 53B is cylindrical, one end is connected to the flange 52B and coaxial with the disc 521B, and the other end is a free end. The center line of the base 53B coincides with the center line of the flange 52B, and the free end of the base 53B is provided with multiple There are two connecting screw holes. In the embodiment, the base 53B is fou...

Embodiment 3

[0091] The other structure of this embodiment is the same as that of the second embodiment, except that it also includes a deflector 32B arranged at one end of the pulse tube 31B and located in the pulse tube 31B, and the deflector 32B is connected to the cold-end heat exchanger 24B.

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Abstract

The invention provides a machine frame and a pulse pipe type free piston stirling refrigerating machine. The machine frame comprises a flange, an expansion piston pipe, a compression piston pipe and abase, wherein the flange is in a disc shape, a concentric disc is arranged on one side face of the flange, the other side face of the flange is connected with the base, the center line of the base coincides with the center line of the flange, the expansion piston pipe is a straight pipe, one end of the expansion piston pipe is connected with the disc, and the other end of the expansion piston pipe is a free end and is used for being connected with a pulse pipe of the refrigerating machine, a cylindrical expansion piston cavity is formed in the expansion piston pipe, and the compression pistonpipe is a straight pipe and is arranged in the base and is connected with the flange, the other end of the compression piston pipe is a free end, a cylindrical compression piston cavity is arranged in the compression piston pipe, the compression piston cavity is coaxial with the expansion piston cavity and communicates with the expansion piston cavity and is parallel to the axis of the compression piston cavity, a plurality of through holes communicating with the compression piston cavity and the outside are formed in the disc, the inner diameter of the compression piston cavity is larger than the inner diameter of the expansion piston cavity, and the inner diameter of the expansion piston cavity is the same as the inner diameter of the pulse pipe.

Description

Technical field [0001] The invention belongs to the field of refrigeration, and specifically relates to a frame and a pulse tube type free piston Stirling refrigerator. Background technique [0002] As an important method of obtaining low temperature, cryogenic refrigerator refrigeration is widely used in aviation, military, superconductivity, communications, electronics, metallurgy, industrial gas liquefaction, and biomedical fields. Especially in recent years, the application requirements of cryogenic refrigerators in aerospace have become more and more obvious. [0003] Life sciences and space material science experiments are an important part of space scientific research. According to statistics, from September 2000 to March 2010, experimental tasks related to human medicine and biotechnology accounted for more than half of all research activities on the International Space Station. At the beginning of the implementation of my country’s manned space missions, space life scienc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/14
CPCF25B9/145F25B2309/1412
Inventor 陈曦何韩军
Owner UNIV OF SHANGHAI FOR SCI & TECH
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