An installation structure of an external filter case for a refrigerator is provided. The filter case may include a main body that provides an inner space in which an internal line may be installed and water filters may be installed, and a cover that covers the inner space of the main body and is detachably coupled with the main body. The main body may have an open front side and may include bosses that protrude from its bottom face. The cover may include insertion holes into which the bosses may be inserted. A lower portion of the main body may be coupled with a lower portion of the cover. Magnets may be installed in upper portions of the main body and the cover, respectively, such that the main body and the cover may be coupled with each other by a magnetic force.

A water purifier includes a body part generating purified water, hot water, and sterilization water. The body part includes: a filter purifying water, a hot water module that defines a heating flow path through which the purified water passing through the filter passes and that heats the purified water passing through the heating flow path into hot water, an intermediate flow path connecting the filter to the hot water module, a sterilization water flow path having a first side branched from the intermediate flow path and a second side connected to a water outlet, a sterilization water module installed in the sterilization water flow path and electrolyzing water passing through the sterilization water flow path into sterilization water, a hot water flow path guiding the hot water passing through the hot water module toward a water discharge nozzle, and a controller controlling the hot water and sterilization modules.

A gravity-based filter cartridge having a cup-shaped upper part and a cup-shaped lower part, the upper part having a main axis (X), a first rim at a first axial end, a hole-free section at a second axial end, and at least one water inlet between the hole-free section and the first rim, the lower part having a second rim and at least one water outlet, wherein filter media is arranged in the lower part, the filter cartridge further including a mesh fixated to the upper part along a closed path, wherein the mesh is further fixated to the hole-free section radially inwards of the closed path as well as a method for manufacturing the same.

The present disclosure provides a drinking water purification system with a backwashable filter cartridge and a nanofiltration system. The drinking water purification system includes a backwashable pre-filtration unit, a nanofiltration unit and a cleaning unit. The backwashable pre-filtration unit is provided with a backwashable filter cartridge. The nanofiltration unit is provided with a nanofiltration filter cartridge. A water outflow side of the backwashable filter cartridge is connected to a water inflow side of the nanofiltration filter cartridge. The cleaning unit is connected to the water outflow side of the backwashable filter cartridge.

An apparatus for filtering and mineralizing a fluid. The apparatus includes an amount of contaminated fluid located in a reservoir and a cartridge that is located downstream from the reservoir and in fluid communication with it. A filter is in fluid communication with the reservoir and the cartridge. The contaminated fluid is pumped along a pathway from the reservoir to the cartridge so that the contaminated fluid moves through the filter to generate filtered fluid in the cartridge. A pre-determined amount of an additive is associated with the cartridge for adding to the filtered fluid to generate a final fluid with the amount of the additive material.

A filter assembly comprises an outer casing, filters and a pipe member connected to first, second and third filters and comprising an inlet flow path and an outlet flow path. The inlet flow path comprises a first inlet flow path connected to the first filter, a second inlet flow path connected to the second filter, a third inlet flow path connected to the third filter, and an inflow member comprising a branch point to allow water to flow in parallel through the first inlet flow path and the second inlet flow path. The outlet flow path comprises a first outlet flow path for water to be discharged from the first filter, and a second outlet flow path for water to be discharged from the second filter. Water discharged from the first outlet flow path from the second outlet flow path is guided and introduced into the third inlet flow path.

An automatic swimming pool cleaner (APC) may be used as a primary or sole water-circulation system of a pool or spa. The pool or spa hence need not employ dedicated water-circulation equipment, unlike conventional such vessels. In some cases, the APC includes a water treatment system for dispensing one or more chemicals for sanitizing (or otherwise treating) pool water.

A disinfection system for treating water. In a specific example, the system treats water prior to its upload to an aircraft or other passenger transportation vehicle. One or more replaceable filters are positioned within a filter chamber housing in order to expose water flowing through the system to filtration treatment.

A disinfection system for treating water. In a specific example, the system treats water prior to its upload to an aircraft or other passenger transportation vehicle. One or more replaceable filters are positioned within a filter chamber housing in order to expose water flowing through the system to filtration treatment.

A water sanitization cap for covering a bottle is provided. The cap may include an ultraviolet-C (“UV-C”) light emitting diode (“LED”) housing and a shell. The shell may be adjacent to a portion of the housing. The cap may also include a waterproof compartment formed within the interior of the housing. The waterproof compartment may include one wall formed at least in part from a transparent material. The cap may include a UV-C LED. The UV-C LED may be fixed within the waterproof compartment, proximal to one end of the UV-C LED housing and oriented to shine light through the transparent material. The cap may include a sensor that when activated, applies a voltage to the UV-C LED to cause the UV-C LED to emit light. The cap may include a cartridge cage that can hold a cartridge. The cartridge cage may be removably attachable to an inner surface of the shell. The waterproof compartment wall may be positioned relative to the cartridge cage such that the UV-C LED, in use, treats water within the bottle before the water flows through the cartridge cage.