US 11,883,320 B2
Method of preparing cryogenic air
Wiesław Brojek, Stare Babice (PL)
Assigned to METRUM CRYOFLEX SP. Z O.O., SPOLKA KOMANDYTOWA, Stare Babice (PL)
Filed by METRUM CRYOFLEX SP. Z O.O. SPÓŁKA KOMANDYTOWA, Stare Babice (PL)
Filed on Oct. 2, 2020, as Appl. No. 17/062,515.
Claims priority of provisional application 62/909,751, filed on Oct. 2, 2019.
Prior Publication US 2021/0100683 A1, Apr. 8, 2021
Int. Cl. A61F 7/00 (2006.01)
CPC A61F 7/0085 (2013.01) [A61F 7/0053 (2013.01); A61F 2007/006 (2013.01); A61F 2007/0064 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method of preparing cryogenic air for use in cryotherapy procedures, using liquid nitrogen and gaseous oxygen, comprising:
feeding liquid nitrogen (1) from a cryogenic nitrogen tank (2) via a cryogenic duct (3) to a reactor (4),
feeding simultaneously a gas (7) containing oxygen in a concentration from 20% to 100% from an oxygen source (5) to the reactor (4), through a gas duct (6),
evaporating in the reactor (4) the liquid nitrogen (1) using the gas (7),
mixing both these components together in the reactor (4),
forming a cold breathable mixture (8),
cooling the mixture (8) to a set temperature of minus 80° C. to minus 160° C.,
feeding the mixture (8) through a cold duct (9) terminated with an outlet (10) to a cryochamber (11), wherein
the method eliminates nitrogen losses during the cryotherapy procedure, and wherein the cryochamber has an oxygen concentration control.