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Title: Cryogenic cooler apparatus

Abstract

A Malone-type final stage for utilization in a Stirling cycle cryogenic cooler apparatus includes a displacer slidable within a vessel. .sup.4 He, .sup.3 He, or a mixture thereof is made to flow in a pulsating unidirectional manner through a regenerator in the displacer by utilization of check valves in separate fluid channels. Stacked copper screen members extend through the channels and through a second static thermodynamic medium within the displacer to provide efficient lateral heat exchange and enable cooling to temperatures in the range of 3-4 K. Another embodiment utilizes sintered copper particles in the regenerator. Also described is a final stage that has a non-thermally conducting displacer having passages with check valves for directing fluid past a regenerator formed in the surrounding vessel.

Inventors:
 [1];  [1];  [2]
  1. (Del Mar, CA)
  2. (Sunnyvale, CA)
Issue Date:
Research Org.:
University of California
Sponsoring Org.:
USDOE
OSTI Identifier:
864456
Patent Number(s):
4366676
Assignee:
Regents of University of California (Berkeley, CA) OAK
DOE Contract Number:  
AT03-76ER70143; AS03-76ER70143
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
cryogenic; cooler; apparatus; malone-type; final; stage; utilization; stirling; cycle; displacer; slidable; vessel; mixture; flow; pulsating; unidirectional; manner; regenerator; check; valves; separate; fluid; channels; stacked; copper; screen; extend; static; thermodynamic; medium; provide; efficient; lateral; heat; exchange; enable; cooling; temperatures; range; 3-4; embodiment; utilizes; sintered; particles; described; non-thermally; conducting; passages; directing; past; formed; surrounding; stirling cycle; embodiment utilizes; provide efficient; heat exchange; check valve; thermodynamic medium; check valves; fluid channels; final stage; fluid past; cooler apparatus; cryogenic cooler; /62/505/

Citation Formats

Wheatley, John C., Paulson, Douglas N., and Allen, Paul C. Cryogenic cooler apparatus. United States: N. p., 1983. Web.
Wheatley, John C., Paulson, Douglas N., & Allen, Paul C. Cryogenic cooler apparatus. United States.
Wheatley, John C., Paulson, Douglas N., and Allen, Paul C. Sat . "Cryogenic cooler apparatus". United States. https://www.osti.gov/servlets/purl/864456.
@article{osti_864456,
title = {Cryogenic cooler apparatus},
author = {Wheatley, John C. and Paulson, Douglas N. and Allen, Paul C.},
abstractNote = {A Malone-type final stage for utilization in a Stirling cycle cryogenic cooler apparatus includes a displacer slidable within a vessel. .sup.4 He, .sup.3 He, or a mixture thereof is made to flow in a pulsating unidirectional manner through a regenerator in the displacer by utilization of check valves in separate fluid channels. Stacked copper screen members extend through the channels and through a second static thermodynamic medium within the displacer to provide efficient lateral heat exchange and enable cooling to temperatures in the range of 3-4 K. Another embodiment utilizes sintered copper particles in the regenerator. Also described is a final stage that has a non-thermally conducting displacer having passages with check valves for directing fluid past a regenerator formed in the surrounding vessel.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {1}
}

Patent:

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