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Composite low-temperature negative-pressure dividing wall type heat exchanger for refrigerating machine in extremely low-temperature area

A technology of low-temperature negative pressure and heat exchanger, which is applied in the field of refrigeration and low-temperature engineering, JT refrigerators, can solve problems that need to be further improved, and achieve the effect of compact structure, ensuring heat exchange, and improving heat exchange efficiency

Pending Publication Date: 2022-07-15
上海铂钺制冷科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] It can be seen that the efficiency of the low-temperature negative pressure partition wall heat exchanger in the prior art still needs to be further improved

Method used

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  • Composite low-temperature negative-pressure dividing wall type heat exchanger for refrigerating machine in extremely low-temperature area
  • Composite low-temperature negative-pressure dividing wall type heat exchanger for refrigerating machine in extremely low-temperature area
  • Composite low-temperature negative-pressure dividing wall type heat exchanger for refrigerating machine in extremely low-temperature area

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Embodiment Construction

[0041] In the following description, numerous technical details are set forth in order to provide the reader with a better understanding of the present application. However, those of ordinary skill in the art can understand that even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be realized.

[0042]Some innovative points of the embodiments of the present application are briefly described below:

[0043] After long-term research, the inventor of the present application creatively proposes a composite low-temperature negative pressure device for an extremely low-temperature zone refrigerator in view of the technical problem that the efficiency of the low-temperature negative pressure partition wall heat exchanger in the prior art still needs to be further improved. Divider wall heat exchanger, including: upper top cover, baffle plate, lower top cover, high ...

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Abstract

The invention relates to the field of refrigeration and low-temperature engineering, and discloses a composite low-temperature negative-pressure dividing wall type heat exchanger for a refrigerating machine in an extremely low-temperature area, which comprises an upper top cover, a baffle, a lower top cover, a high-pressure outlet connecting pipe, a sleeve, a copper wire net, a stainless steel wire net, a pipe-in-pipe heat exchanger inner pipe and a pipe-in-pipe heat exchanger outer pipe. The heat exchanger is applied to a last-stage refrigerating unit of a refrigerating machine in an extremely-low-temperature area, is compact in structure, can be used as an efficient negative-pressure dividing wall type heat exchanger in an extremely-low-temperature gas-liquid two-phase area, and can also be used as a three-way structure for shunting high-pressure fluid and low-pressure fluid of a last-stage pipe double-pipe heat exchanger; the axial heat conduction loss of the last-stage dividing wall type heat exchanger for the refrigerating machine in the extremely-low-temperature area is reduced, the flow speed of low-mass-flow fluid in the extremely-low-temperature area is increased, the heat exchange area of the fluid in a gas-liquid two-phase flow area is increased, and the heat exchange efficiency of the last-stage dividing wall type heat exchanger for the refrigerating machine in the extremely-low-temperature area is improved. And the refrigerating machine has very positive significance in application of the refrigerating machine in special fields such as extremely low temperature areas, aerospace and the like.

Description

technical field [0001] The present application relates to the field of refrigeration and cryogenic engineering, in particular to the technical field of JT refrigerators. Background technique [0002] JT refrigerator (Joule-Thomson Cooler) is a typical partition-wall refrigerator. Under the condition of pre-cooling, it can be used as an important technical means to realize the refrigeration in the extremely low temperature area below liquid helium, and the low temperature refrigeration below 120K The field has important and wide-ranging applications. [0003] The low temperature negative pressure partition heat exchanger is one of the important key components of the composite refrigerator in the extremely low temperature area. For operation, the efficiency of the low temperature negative pressure partition heat exchanger is usually required to reach more than 97%. Since the heat exchange of the low-temperature negative pressure partition heat exchanger is much larger than t...

Claims

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Application Information

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IPC IPC(8): F25B9/00F25B39/00
CPCF25B9/002F25B39/00
Inventor 党海政赵帮健
Owner 上海铂钺制冷科技有限公司
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