Cleaning arrangement for a liquid treatment system

A cleaning arrangement configured to be used in a liquid treatment system, the liquid treatment system including 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, the liquid treatment system further including a reactor configured to receive the sleeve, the reactor and the sleeve togetherat least partially defining 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, the cleaning arrangement comprising:

• at least two coil springs, 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 of the liquid treatment system based on the cleaning arrangement being provided in the liquid treatment system 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;
• and
• a holder, wherein the at least two coil springs are mounted in the holder such that the at least two coil springs are configured to together wrap overessentially an entirety of the circumference of the sleeve of the liquid treatment system based on the cleaning arrangement being provided in the liquid treatment system,
• wherein the holder 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,
• wherein the first and second ring shaped coil spring attachment parts are configured to encircle the sleeve of the liquid treatment system based on the cleaning arrangement being provided in the liquid treatment system and configured to be movable along the sleeve,
• wherein a first end of each coil spring of the at least two coil springs of the cleaning arrangement 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 based on the cleaning arrangement being provided in the liquid treatment system,
• 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.