Pneumatic GM refrigerating machine and control process thereof

A technology for controlling processes and refrigerators, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of high-pressure gas consumption, low theoretical efficiency, low efficiency, etc., to improve efficiency, improve refrigeration efficiency, and easy to operate. Effect

Active Publication Date: 2016-01-06
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a conventional pneumatic GM refrigerator, the movement of the pushing piston is driven by the high-pressure gas from the compressor through the driving piston. Although the structure is simple, it consumes part of the high-pressure gas from the compresso

Method used

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  • Pneumatic GM refrigerating machine and control process thereof
  • Pneumatic GM refrigerating machine and control process thereof
  • Pneumatic GM refrigerating machine and control process thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1

[0041] A pneumatic GM refrigerator, a single-stage pneumatic GM refrigerator with two gas storages, with a structure such as figure 1 As shown, it includes a driving cylinder 212, a refrigeration cylinder 222, a driving piston 211, a pushing piston 221, and a cold heat exchanger 225. The driving cylinder 212 is connected with the refrigeration cylinder 222 up and down, and the driving piston 211 is connected with the pushing piston 221 up and down, and the driving piston 211 is slidably connected with the driving cylinder 212. The driving piston 211 can slide in the driving cylinder 212. A driving cavity 214 is formed between the driving cylinder 212 and the driving piston 211. The pushing piston 221 can slide in the refrigeration cylinder 222. The cylinder 222 is in a sliding connection. The inside of the refrigeration cylinder 222 is divided into a room temperature cavity 223 and a low temperature cavity 224 by the pushing piston 221. The cold heat exchanger 2...

Example Embodiment

[0050] Example 2

[0051] A pneumatic GM refrigerator, a three-gas storage single-stage pneumatic GM refrigerator, the structure is as figure 2 As shown, the difference in structure from the two-air storage single-stage pneumatic GM refrigerator in Embodiment 1 is that the driving cavity 214 is simultaneously connected to the low-pressure gas storage 111, the medium-pressure gas storage 121, and the high-pressure gas storage 131, and the driving chamber 214 is connected to The connecting pipelines of the low pressure gas storage 111, the medium pressure gas storage 121 and the high pressure gas storage 131 are respectively provided with a low pressure gas storage valve 112, a medium pressure gas storage valve 122 and a high pressure gas storage valve 132.

[0052] In this embodiment, the driving piston 211 and the pushing piston 221 are integrally connected.

[0053] The working process of the pneumatic GM refrigerator in this embodiment is as follows:

[0054] 1. Open the medium pre...

Example Embodiment

[0062] Example 3

[0063] A pneumatic GM refrigerator, a three-gas storage two-stage pneumatic GM refrigerator, the structure is as image 3 As shown, the difference between the structure of the three-gas storage single-stage pneumatic GM refrigerator in Embodiment 2 is that the refrigeration cylinder 222 is connected to the second-stage cylinder 232, the pushing piston 221 is connected to the second-stage pushing piston 231, and the second The second-stage sliding piston 231 and the second-stage cylinder 232 are in cooperation and sliding connection. The second-stage low-temperature chamber 233 is formed between the second-stage piston 231 and the second-stage cylinder 232. The bottom end of the second-stage cylinder 232 is connected to the second-stage refrigeration exchange. Heater 234.

[0064] According to actual needs, it is also possible to continue to install the third-stage piston and the third-stage cylinder on the second-stage piston 231 and the second-stage cylinder 232...

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PUM

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Abstract

The invention relates to a pneumatic GM refrigerating machine and a control process thereof. The pneumatic GM refrigerating machine comprises a driving cylinder, a refrigerating cylinder, a driving piston, a push piston and a refrigeration capacity heat exchanger, wherein the driving cylinder is vertically connected with the refrigerating cylinder, the driving piston is vertically connected with the push piston, the driving piston can slide in the driving cylinder, a driving cavity is formed between the driving cylinder and the driving piston, the push piston can slide in the refrigerating cylinder, the inner part of the refrigerating cylinder is divided into a room temperature cavity and a low temperature cavity by the push piston, the refrigeration capacity heat exchanger is connected with the lower temperature cavity, the room temperature cavity is connected with a low-pressure gas pipeline and a high-pressure gas pipeline, the driving cavity is at least connected with a low-pressure gas storage and a high-pressure gas storage. Compared with the prior art, on the basis of the original GM refrigerating machine, the low-pressure gas storage and the high-pressure gas storage are arranged on the driving cavity, the movement of the piston is driven to move by the gas in the gas storages, so that the refrigerating efficiency of the refrigerating machine is increased. The pneumatic GM refrigerating machine is simple in structure and easy to operate.

Description

technical field [0001] The invention relates to a low-temperature refrigerator, in particular to a pneumatic GM refrigerator and its control process. Background technique [0002] The GM refrigerator is a low-temperature refrigerator that utilizes high-pressure gas for refrigeration. Usually the high pressure gas is helium. The high-pressure air source and the low-pressure air source are respectively communicated through the switching valve, so that the high-pressure gas flows into the refrigerator for expansion and cooling, and then flows into the low-pressure air source. The gas source is usually a GM compressor with a high pressure gas outlet and a low pressure gas inlet. In a conventional pneumatic GM refrigerator, the movement of the pushing piston is driven by the high-pressure gas from the compressor through the driving piston. Although the structure is simple, it consumes part of the high-pressure gas from the compressor, so the efficiency is low. If there is only...

Claims

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Application Information

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IPC IPC(8): F25B9/14F25B49/00
Inventor 朱绍伟
Owner TONGJI UNIV
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