US 11,987,922 B2
Automatic feeding device, control method thereof and multi drum washing machine
Tao Huang, Shandong (CN); Bingheng Zhou, Shandong (CN); and Wenwei Li, Shandong (CN)
Assigned to CHONGQING HAIER DRUM WASHING MACHINE CO., LTD., Chongqing (CN); and HAIER SMART HOME CO., LTD., Shandong (CN)
Appl. No. 17/254,632
Filed by CHONGQING HAIER DRUM WASHING MACHINE CO., LTD., Chongqing (CN); and HAIER SMART HOME CO., LTD., Shandong (CN)
PCT Filed Jun. 12, 2019, PCT No. PCT/CN2019/090863
§ 371(c)(1), (2) Date Dec. 21, 2020,
PCT Pub. No. WO2019/242546, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 201810645064.5 (CN), filed on Jun. 21, 2018; application No. 201810645873.6 (CN), filed on Jun. 21, 2018; and application No. 201810645876.X (CN), filed on Jun. 21, 2018.
Prior Publication US 2021/0115613 A1, Apr. 22, 2021
Int. Cl. D06F 39/08 (2006.01); D06F 39/02 (2006.01); D06F 33/37 (2020.01); D06F 105/02 (2020.01); D06F 105/42 (2020.01)
CPC D06F 39/02 (2013.01) [D06F 39/022 (2013.01); D06F 33/37 (2020.02); D06F 39/028 (2013.01); D06F 39/088 (2013.01); D06F 2105/02 (2020.02); D06F 2105/42 (2020.02)] 20 Claims
OG exemplary drawing
 
1. An automatic feeding device, comprising:
at least two water outlets;
a water supply pipeline configured to controllably and reversibly deliver inlet water to any one of the water outlets;
at least two liquid storage parts each configured to contain additive; and
a pumping structure configured to generate a negative pressure by virtue of a water flow flowing through the water supply pipeline to pump out the additives in the at least two liquid storage parts and deliver the additives to the selected water outlet with the water flow;
the at least two liquid storage parts include a first liquid storage part and a second liquid storage part;
a flushing pipeline, wherein at least a part of the water flow at a water outlet end of the water supply pipeline is directly introduced to the pumping structure by the flushing pipeline to perform flushing, and then returns to the water supply pipeline through the pumping structure;
two ends of a connecting pipeline respectively communicate with a water outlet end of the flushing pipeline and a pumping port of the pumping structure;
the connecting pipeline is connected in series with first and second reversing valves, and a reversing port of each of the reversing valves communicates with each of the liquid storage parts in a one-to-one correspondence; and configured so that when any one of the reversing valves is switched to enable the corresponding liquid storage part to communicate with the pumping port of the pumping structure, the two reversing ports, communicating with the connecting pipeline, of the reversing valve are disconnected;
each of the first reversing valve and the second reversing valve is a valve body provided with two inlets and one outlet, and the inlets are configured to respectively communicate with the two outlets under the actions of valve elements inside the valve bodies;
a first inlet and the outlet of each of the first reversing valve and the second reversing valve are both formed in the connecting pipeline, and second inlets of the first reversing valve and the second reversing valve respectively communicate with the first liquid storage part and the second liquid storage part in a one-to-one correspondence.