US 12,402,772 B2
Automatic detergent feeding device and washing apparatus
Tao Huang, Shandong (CN); Liping Li, Shandong (CN); and Huacheng Zhang, Shandong (CN)
Assigned to CHONGQING HAIER DRUM WASHING MACHINE CO., LTD., Chongqing (CN); and HAIER SMART HOME CO., LTD., Shandong (CN)
Appl. No. 18/003,928
Filed by CHONGQING HAIER DRUM WASHING MACHINE CO., LTD., Chongqing (CN); and HAIER SMART HOME CO., LTD., Shandong (CN)
PCT Filed Jun. 11, 2021, PCT No. PCT/CN2021/099646
§ 371(c)(1), (2) Date Dec. 30, 2022,
PCT Pub. No. WO2021/213551, PCT Pub. Date Oct. 28, 2021.
Claims priority of application No. 202010625518.X (CN), filed on Jul. 1, 2020.
Prior Publication US 2023/0263364 A1, Aug. 24, 2023
Int. Cl. A47L 15/44 (2006.01); D06F 39/02 (2006.01); F16K 15/02 (2006.01); F16K 15/14 (2006.01)
CPC A47L 15/4418 (2013.01) [D06F 39/022 (2013.01); F16K 15/026 (2013.01); F16K 15/148 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An automatic detergent feeding device, comprising a liquid storage box, the liquid storage box is provided with a liquid outlet channel, wherein inside of the liquid outlet channel is provided with:
an opening and closing valve assembly for opening/closing the liquid outlet channel; and
an anti-backflow valve assembly, which is arranged at an upstream, corresponding to a liquid outlet direction, of the opening and closing valve assembly to prevent an external liquid from flowing backwards into the liquid storage box;
the opening and closing valve assembly and the anti-backflow valve assembly cooperate to make the liquid outlet channel have a first state and a second state;
in the first state, both the opening and closing valve assembly and the anti-backflow valve assembly are opened, and the liquid outlet channel is opened; and
in the second state, the opening and closing valve assembly is opened, the anti-backflow valve assembly is closed, and the liquid outlet channel is closed;
the anti-backflow valve assembly comprises a first valve seat and a first valve core,
the first valve seat is sealingly connected with the liquid outlet channel, the first valve seat is provided with a first valve hole for the first valve core to pass through and a first through-hole for the detergent to pass through,
the first valve core is arranged in the first valve hole to open/close the first through-hole.