US 12,240,769 B2
Cleaning arrangement for a liquid treatment system
Staffan Strand, Stockholm (SE); and Johan Bergqvist, Saltsjo-Boo (SE)
Assigned to Wallenius Water Innovation AB, Stockholm (SE)
Appl. No. 17/790,855
Filed by Wallenius Water Innovation AB, Stockholm (SE)
PCT Filed Jan. 18, 2021, PCT No. PCT/SE2021/050023
§ 371(c)(1), (2) Date Jul. 5, 2022,
PCT Pub. No. WO2021/158156, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 2050120-1 (SE), filed on Feb. 6, 2020.
Prior Publication US 2023/0025794 A1, Jan. 26, 2023
Int. Cl. C02F 1/32 (2023.01)
CPC C02F 1/325 (2013.01) [C02F 2201/3223 (2013.01); C02F 2201/324 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A liquid treatment system comprising:
at least one ultra-violet (UV) light treatment lamp arranged within an elongated protective UV-transparent sleeve provided along a central longitudinal axis A, the sleeve having an outer surface and an essentially circular cross-sectional shape;
a reactor configured to receive the sleeve, whereby the reactor and the sleeve together at least partially define a liquid treatment chamber for receiving liquid to be treated, the liquid treatment chamber at least partially defined between an inner surface of the reactor and the outer surface of the sleeve; and
at least one cleaning arrangement including at least two coil springs and a holder, each coil spring of the at least two coil springs configured to be wrapped around at least a respective part of a circumference of the sleeve such that a respective spring force of each respective coil spring of the at least two coil springs presses the respective coil spring towards the sleeve, wherein the cleaning arrangement is configured to be moved along the sleeve such that the at least two coil springs clean the outer surface of the sleeve,
wherein the at least two coil springs are mounted in the holder of the cleaning arrangement such that the at least two coil springs together wrap over essentially an entirety of the circumference of the sleeve,
wherein the holder of the cleaning arrangement includes a first ring shaped coil spring attachment part and a second ring shaped coil spring attachment part, the first and second ring shaped coil spring attachment parts connected to each other such that the first and second ring shaped coil spring attachment parts are provided at a distance from each other along the sleeve, wherein the first and second ring shaped coil spring attachment parts are configured to encircle the sleeve and to be movable along the sleeve,
wherein a first end of each coil spring of the at least two coil springs is attached to the first ring shaped coil spring attachment part and a second end of each coil spring of the at least two coil springs is attached to the second ring shaped coil spring attachment part to configure the at least two coil springs to wrap around respective parts of the circumference of the sleeve,
wherein the at least two coil springs are not connected a shortest distance between the first and second coil ring shaped spring attachment parts, and
wherein the at least two coil springs are mounted diagonally in a rotational pattern in the holder.