US 12,448,973 B2
Hydraulic system for a household appliance
Rodrigo Orue Orue, Zigoitia (ES)
Assigned to COPRECI, S.COOP., Aretxabaleta (ES)
Filed by COPRECI, S.COOP., Aretxabaleta (ES)
Filed on Nov. 30, 2023, as Appl. No. 18/524,371.
Claims priority of application No. 22383289 (EP), filed on Dec. 26, 2022.
Prior Publication US 2024/0209860 A1, Jun. 27, 2024
Int. Cl. F04D 15/00 (2006.01); A47L 15/42 (2006.01); A47L 15/46 (2006.01); D06F 39/08 (2006.01); D06F 103/14 (2020.01); D06F 103/42 (2020.01); D06F 103/48 (2020.01); D06F 105/46 (2020.01); D06F 105/52 (2020.01); D06F 105/58 (2020.01); F04D 13/06 (2006.01); F04D 15/02 (2006.01); F04D 29/42 (2006.01); F04D 29/70 (2006.01); F15B 15/18 (2006.01); F16K 15/03 (2006.01); F16K 37/00 (2006.01); G08B 21/18 (2006.01); H02P 21/20 (2016.01)
CPC F04D 15/0066 (2013.01) [F04D 13/06 (2013.01); F04D 15/0005 (2013.01); F04D 15/0022 (2013.01); F04D 15/0209 (2013.01); F04D 15/0218 (2013.01); F04D 29/4293 (2013.01); F04D 29/708 (2013.01); F15B 15/18 (2013.01); F16K 15/03 (2013.01); F16K 37/0033 (2013.01); F16K 37/0041 (2013.01); G08B 21/18 (2013.01); H02P 21/20 (2016.02); A47L 15/4225 (2013.01); A47L 15/46 (2013.01); A47L 2401/07 (2013.01); A47L 2401/08 (2013.01); A47L 2501/05 (2013.01); A47L 2501/26 (2013.01); A47L 2501/36 (2013.01); D06F 39/085 (2013.01); D06F 2103/14 (2020.02); D06F 2103/42 (2020.02); D06F 2103/48 (2020.02); D06F 2105/46 (2020.02); D06F 2105/52 (2020.02); D06F 2105/58 (2020.02); Y10T 137/7898 (2015.04); Y10T 137/8242 (2015.04)] 20 Claims
OG exemplary drawing
 
1. A hydraulic system for a household appliance, the hydraulic system comprising:
a pump having an impeller that when rotated drives a fluid towards a fluid outlet of the pump;
an outlet conduit connected to and in fluid communication with the fluid outlet of the pump;
a check valve located in the outlet conduit, the check valve including a support and a flap that is pivotably coupled to the support, the support including a support surface, each of the flap and the support surface comprising ferromagnetic properties with at least one of the flap and support surface comprising a permanent magnet, the flap being configured to pivot between an open position in which the flap is not supported on the support surface, and a closed position in which the flap is supported on the support surface, in the open position the flap allows the fluid to flow through outlet conduit, in the closed position the flap prevents the fluid from flowing through the outlet conduit;
an electric motor coupled to the pump impeller in such a way that when the electric motor rotates the impeller also rotates; and
a control unit that is configured to control the speed of the electric motor in a closed loop, the control unit also being configured to monitor current consumption of the electric motor and/or voltage in terminals of the electric motor to determine whether the flap of the check valve is in the open position or in the closed position.