US 12,239,792 B2
Method and device for controlling the temperature of the gas flow in medical devices
Felix Menzel, Berlin (DE); Andreas Zeyssig, Berlin (DE); and Johannes Korner, Weingarten (DE)
Assigned to W.O.M. World of Medicine GmbH, Berlin (DE)
Filed by W.O.M. World of Medicine GmbH, Berlin (DE)
Filed on Apr. 26, 2021, as Appl. No. 17/240,589.
Application 17/240,589 is a continuation of application No. 15/547,291, granted, now 12,023,446, previously published as PCT/DE2016/000027, filed on Jan. 27, 2016.
Claims priority of application No. 102015000845.5 (DE), filed on Jan. 27, 2015.
Prior Publication US 2021/0346636 A1, Nov. 11, 2021
Int. Cl. A61M 16/10 (2006.01); A61M 13/00 (2006.01); A61M 16/08 (2006.01); G05D 23/19 (2006.01)
CPC A61M 16/1095 (2014.02) [A61M 13/00 (2013.01); A61M 13/003 (2013.01); A61M 16/0875 (2013.01); G05D 23/1917 (2013.01); A61M 2202/0208 (2013.01); A61M 2202/0225 (2013.01); A61M 2205/3368 (2013.01); A61M 2205/3653 (2013.01); A61M 2205/50 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for measuring and controlling the gas temperature in medical methods, comprising the steps of:
supplying a gas to a patient using a gas supply device and a supply line, wherein the gas is supplied at a gas volume flow that is controllable between 0 and 50 l/min;
heating the gas to a desired temperature using a heating system prior to the gas being provided to the patient, wherein heating occurs using a heating wire positioned within the supply line;
electrically controlling the heating power of the heating wire based on an estimated value of a temperature of the gas at an exit of the heating system obtained from a mathematical estimation system that is configured as a state observer, wherein a resistance of the heating wire and current gas flow volume are used as input variables of the mathematical estimation system.