US 12,253,289 B2
Serially arranged circulating cryocooler system
Stephen B. Dunn, Bethlehem, PA (US); and Santhosh K. Gandla, Allentown, PA (US)
Assigned to SUMITOMO (SHI) CRYGENICS OF AMERICA, INC., Allentown, PA (US)
Filed by Sumitomo (SHI) Cryogenics of America, Inc., Allentown, PA (US)
Filed on Jul. 27, 2022, as Appl. No. 17/874,781.
Claims priority of provisional application 63/226,851, filed on Jul. 29, 2021.
Prior Publication US 2023/0033344 A1, Feb. 2, 2023
Int. Cl. F25B 9/14 (2006.01); F25B 1/00 (2006.01); F25B 41/20 (2021.01); F25B 41/45 (2021.01); F25B 49/02 (2006.01)
CPC F25B 9/14 (2013.01) [F25B 1/005 (2013.01); F25B 41/20 (2021.01); F25B 41/45 (2021.01); F25B 49/02 (2013.01); F25B 2309/001 (2013.01); F25B 2309/1428 (2013.01); F25B 2600/2507 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A cryogenic refrigeration system that circulates gas to a remote load, comprising:
a compressor compressing a gas from a low pressure to a high pressure;
at least one Gifford-McMahon (GM) or GM type pulse tube cold head receiving all of the gas at ambient temperature and at high pressure from said compressor through a first line and returning all of said gas near ambient temperature and at low pressure to the compressor through a second line, producing refrigeration at one or more cold surfaces of the GM or GM type pulse tube; and
a circulation loop transporting the refrigeration from said one or more cold surfaces of the GM or GM type pulse tube to a remote load, wherein the circulation loop is configured such that either (i) the circulation loop is connected only to the second line, wherein all or a fraction of said gas from the second line flows though the circulation loop to transport the refrigeration to the remote load and returns to the second line, or (ii) the circulation loop is connected only to the first line, wherein all or a fraction of said gas from the first line flows though the circulation loop to transport the refrigeration to the remote load and returns to the first line.