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A g-m refrigerator with cold end heat exchanger movement and method

A cold-end heat exchanger, G-M technology, used in refrigerators, refrigeration and liquefaction, gas cycle refrigerators, etc., can solve problems such as limiting effectiveness, enhance stability and reliability, reduce mass, reduce vibrating effect

Active Publication Date: 2019-05-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some researchers have solved these problems by reducing the mass of the ejector and adding anti-vibration devices, but the mass of the regenerator limits the effectiveness of these methods

Method used

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  • A g-m refrigerator with cold end heat exchanger movement and method
  • A g-m refrigerator with cold end heat exchanger movement and method
  • A g-m refrigerator with cold end heat exchanger movement and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Such as figure 2 As shown, the GM refrigerator with the cold end heat exchanger of this embodiment includes an intake valve 1, an exhaust valve 2, a first connecting rod 3, a dynamic seal 4, a cylinder 5, a heat regenerator 6, and a cold end heat exchanger. Heater 7, motor 8. The connection relationship between the components is: the intake valve 1 and the exhaust valve 2 are connected with the compressor of the G-M refrigerator, and communicate with the top of the cylinder 5. The regenerator 6 is fixed to the upper part of the cylinder 5. The cold end heat exchanger 6 is sleeved on the lower end of the cylinder 5, and a dynamic seal 7 is added between the cylinder 5 and the wall surface of the cylinder 5, which can reciprocate under sealing conditions, and its movement stroke is shown by the arrow in the figure. The connecting rod 8 connects the bottom end of the cold end heat exchanger 6 and the motor 8. The connecting rod 3 is made of plastic with low thermal condu...

Embodiment 2

[0049] Such as image 3 As shown, the structure of the G-M refrigerator with the cold end heat exchanger in this embodiment is basically the same as that of Embodiment 1, and the difference lies in the arrangement of the connecting rod 3 and the motor 8. In this embodiment, there are multiple connecting rods 3 that pass around the cylinder 5 to connect the upper end of the cold end heat exchanger 7 and the motor 8, and the motor 8 is located at the top of the cylinder 5.

[0050] The working process of this embodiment is consistent with the first embodiment.

Embodiment 3

[0052] Such as Figure 4 As shown, the G-M refrigerator with cold-end heat exchanger movement in this embodiment has basically the same structure as that of Embodiment 1, except that the movement of the cold-end heat exchanger 7 is driven by air pressure. The connecting rod 3 connects the cold end heat exchanger 7 and the pushing piston 9, and the pushing piston 9 is placed in the pneumatic cavity 10 and sealed with the inner wall of the pneumatic cavity 10. The variable pressure chamber at the upper part of the pushing piston 9 in the pneumatic chamber 10 communicates with the intake valve 1 and the exhaust valve 2, and the lower constant pressure chamber communicates with the constant pressure source 11.

[0053] The working process of this embodiment is basically the same as that of Embodiment 1. The difference is that the movement of the cold end heat exchanger 7 is driven by the pressure difference between the two sides of the piston 9 in the pneumatic cavity 10. The upper ...

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Abstract

The invention discloses a G-M refrigerating machine for movement of a cold-end heat exchanger. The G-M refrigerating machine for the movement of the cold-end heat exchanger comprises a cylinder provided with an air inlet valve and an air exhaust valve and also comprises a heat regenerator mounted in the cylinder, a cold-end heat exchanger connected with a refrigeration end of the cylinder by virtue of dynamic seal and a driving mechanism used for driving the cold-end heat exchanger to reciprocate according to operating frequency of the refrigerating machine so as to change volume of the refrigeration end of the cylinder. The invention also discloses a G-M refrigerating machine for the movement of the cold-end heat exchanger. The G-M refrigerating machine disclosed by the invention has the advantages that displacer movement is changed into cold-end heat exchanger movement, and mass of a moving part is lowered, so that vibration of the refrigerating machine is reduced, and stability and reliability of the refrigerating machine are improved; the mass of the moving part is lowered, so that power consumption required for movement of the moving part is lowered, and efficiency of the refrigerating machine is improved; and the cold-end heat exchanger moves, relative movement between a gas working medium and the cold-end heat exchanger is strengthened, boundary layer heat exchange is strengthened, and heat exchange efficiency of the cold-end heat exchanger is improved, so that the efficiency of the refrigerating machine is improved.

Description

Technical field [0001] The invention relates to the technical field of low-temperature refrigerators, in particular to a G-M refrigerator and a method for moving the cold end heat exchanger. Background technique [0002] G-M refrigerator is a small low-temperature refrigerator that uses compressed gas for adiabatic and vented cooling. It uses standard compressors for ordinary refrigerators and has low cost. After decades of development, it has now been widely used in modern science and technology, medicine, and low-temperature physics experiments. [0003] The G-M refrigerator is divided into two parts: a compressor and an expander. The compression part mostly uses an ordinary refrigeration compressor and is equipped with a special gas purification system, thereby reducing the cost. The expander part such as figure 1 As shown, it includes an intake valve 1, an exhaust valve 2, a regenerator 6, a cylinder 5, and a cold end heat exchanger 7. The regenerator 6 is placed in the eject...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B9/14
CPCF25B9/14F25B2309/14
Inventor 植晓琴黄宸邱利民夏曦
Owner ZHEJIANG UNIV