US 12,234,171 B2
Filter module for water dispensing device
Youngjae Kim, Seoul (KR); Changhwan Yoon, Seoul (KR); and Gyeonghwan Kweon, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Jan. 6, 2022, as Appl. No. 17/569,928.
Claims priority of application No. 10-2021-0002034 (KR), filed on Jan. 7, 2021.
Prior Publication US 2022/0212970 A1, Jul. 7, 2022
Int. Cl. C02F 9/00 (2023.01); B01D 29/21 (2006.01); B01D 35/06 (2006.01); B01D 35/30 (2006.01); B01D 39/14 (2006.01); B01D 61/14 (2006.01); B01D 61/16 (2006.01); B01D 61/18 (2006.01); C02F 1/00 (2023.01); C02F 1/28 (2023.01); C02F 1/48 (2023.01); C02F 1/44 (2023.01)
CPC C02F 9/00 (2013.01) [B01D 29/213 (2013.01); B01D 35/06 (2013.01); B01D 35/301 (2013.01); B01D 39/14 (2013.01); B01D 61/145 (2013.01); B01D 61/16 (2013.01); B01D 61/18 (2013.01); B01D 2201/12 (2013.01); B01D 2201/304 (2013.01); B01D 2239/0435 (2013.01); B01D 2239/065 (2013.01); B01D 2311/2603 (2013.01); B01D 2311/2626 (2013.01); B01D 2311/2649 (2013.01); C02F 1/003 (2013.01); C02F 1/283 (2013.01); C02F 1/444 (2013.01); C02F 1/48 (2013.01); C02F 2307/10 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A filter module for a liquid dispensing device, the filter module comprising:
a pre-filter including a first carbon block having a hollow shape;
a hollow fiber membrane filter that receives water from the pre-filter; and
a composite filter including:
a filter housing including an inflow port and a discharge port;
a second carbon block having a hollow shape, the second carbon block being provided in a lower space of the filter housing;
a third carbon block having a hollow shape, the third carbon block being provided in an upper space of the filter housing;
an electrostatic adsorption filter positioned around an outer surface of the third carbon block; and
a first filter bracket positioned between the second carbon block and the third carbon block,
wherein the first filter bracket defines a water passage from an inner surface of the second carbon block to an outer surface of the electrostatic adsorption filter,
wherein the first filter bracket extends along an upper surface of the second carbon block and portions of the inner surface and an outer surface of the second carbon block,
wherein the electrostatic adsorption filter includes a plurality of convex surfaces that are convex outwardly, and a plurality of concave surfaces that are provided between the convex surfaces and contact the outer surface of the third carbon block so that the electrostatic adsorption filter has a wrinkled shape along a circumferential direction,
wherein a diameter of the outer surface of the second carbon block is greater than a diameter of an outer surface of the third carbon block, and the diameter of the outer surface of the second carbon block corresponds to a diameter of the outer surface of the electrostatic adsorption filter,
wherein the electrostatic absorption filter includes a polyamine-based polymer positively charged functional group applied to a cellulose support body, and
wherein water sequentially passes through the first carbon block, the hollow filament membrane, the second carbon block, the electrostatic adsorption filter, and the third carbon block.