US 11,937,751 B2
Movable electric device
Pin Yang, Foshan (CN); Jiefeng Cheng, Foshan (CN); Xinjian Huang, Foshan (CN); Shuyun Wu, Foshan (CN); and Junge Zhang, Foshan (CN)
Assigned to GUANGDONG MIDEA WHITE HOME APPLIANCE TECHNOLOGY INNOVATION CENTER CO., LTD., Foshan (CN); and MIDEA GROUP CO., LTD., Foshan (CN)
Appl. No. 17/287,529
Filed by GUANGDONG MIDEA WHITE HOME APPLIANCE TECHNOLOGY INNOVATION CENTER CO., LTD., Foshan (CN); and MIDEA GROUP CO., LTD., Foshan (CN)
PCT Filed Nov. 9, 2018, PCT No. PCT/CN2018/114887
§ 371(c)(1), (2) Date Apr. 22, 2021,
PCT Pub. No. WO2020/093389, PCT Pub. Date May 14, 2020.
Prior Publication US 2021/0393100 A1, Dec. 23, 2021
Int. Cl. A47L 11/40 (2006.01); A47L 11/24 (2006.01); G01N 27/04 (2006.01); G01N 27/22 (2006.01)
CPC A47L 11/4011 (2013.01) [A47L 11/24 (2013.01); A47L 11/4002 (2013.01); A47L 11/4038 (2013.01); A47L 11/4041 (2013.01); A47L 11/4066 (2013.01); A47L 11/4072 (2013.01); G01N 27/04 (2013.01); G01N 27/226 (2013.01); A47L 2201/04 (2013.01); A47L 2201/06 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A movable electric device for detecting ground dirt or cleaning up wastes, comprising:
a movable device body, comprising an electric drive means; and
a contact detection electrode, mounted on the movable device body;
wherein when the contact detection electrode contacts diffusible dirt, a resistance, capacitance or impedance of the contact detection electrode varies;
wherein the contact detection electrode comprises a positive electrode and a negative electrode, and
the thickness of the positive electrode is greater than the thickness of the negative electrode, or the thickness of the negative electrode is greater than the thickness of the positive electrode.