US 12,345,449 B2
Adiabatic demagnetization apparatus
Alexander Regnat, Munich (DE); and Jan Spallek, Munich (DE)
Assigned to KIUTRA GMBH, Munich (DE)
Appl. No. 17/626,166
Filed by KIUTRA GMBH, Munich (DE)
PCT Filed Jul. 13, 2020, PCT No. PCT/EP2020/069792
§ 371(c)(1), (2) Date Jan. 11, 2022,
PCT Pub. No. WO2021/009139, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 10 2019 119 092.4 (DE), filed on Jul. 15, 2019.
Prior Publication US 2022/0316768 A1, Oct. 6, 2022
Int. Cl. F25B 21/00 (2006.01); F25B 9/14 (2006.01); F25D 19/00 (2006.01)
CPC F25B 21/00 (2013.01) [F25B 9/145 (2013.01); F25D 19/006 (2013.01); F25B 2321/0021 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of controlling an adiabatic demagnetization apparatus operating in continuous adiabatic demagnetization refrigeration (CADR) mode, comprising:
providing n adiabatic demagnetization units that provide cooling without the use of liquid cooling media, wherein n is the total number of adiabatic demagnetization units and n is equal or greater than 2;
cycling at least two of the adiabatic demagnetization units of the adiabatic demagnetization apparatus between respective first temperatures and second temperatures with varying cycling frequency, wherein the cycling frequency is varied during the operating of the adiabatic demagnetization apparatus in the CADR mode based on a change of a heat load, and wherein the cycling frequency is increased when the heat load increases and the cycling frequency is decreased when the heat load decreases.