A water filter cartridge having an ultraviolet sterilizing function and a water purifier are provided. The water filter cartridge includes a housing, a filtering component, a plurality of flow channels, and an ultraviolet module. The housing has an upper chamber and a lower chamber in fluid communication with the upper chamber. The filtering component is disposed in the upper chamber. The flow channels are arranged in the lower chamber and stacked in a multi-layered arrangement. The ultraviolet module includes an ultraviolet light emitting element disposed in the lower chamber.

A water treatment pitcher includes a portable container, with a cover to and a filling inlet, and a spout for dispensing filtered water. The pitcher has an upper water basin inside the portable container for receiving water, having a filter seat for a filter. The water basin allows the filtered water to drip into and be collected in a space of the container that is lower with respect to the filter when the container is upright; and an ultraviolet (UV) generator configured to radiate UV radiation from a UV emitter on the water collected in the space and to radiate UV radiation from the UV emitter onto the filtered water as it drips from an outlet of the upper water basin to the space of the container that is lower with respect to the filter.

A water treatment pitcher includes a portable container, with a cover to and a filling inlet, and a spout for dispensing filtered water. The pitcher has an upper water basin inside the portable container for receiving water, having a filter seat for a filter. The water basin allows the filtered water to drip into and be collected in a space of the container that is lower with respect to the filter when the container is upright; and an ultraviolet (UV) generator configured to radiate UV radiation from a UV emitter on the water collected in the space and to radiate UV radiation from the UV emitter onto the filtered water as it drips from an outlet of the upper water basin to the space of the container that is lower with respect to the filter.

A water treatment device comprising a clear container with lid surrounded by a solar reflector, and an insert in the form of a thin sheet or mesh permanently coated with titanium dioxide as a water sanitizing catalyst. The container is filled with non-potable water, covered with the lid, and placed in direct sunlight. Direct and reflected sunlight enters the water through the clear container and lid, where the sunlight's UV radiation and increased solar thermal heat disinfect the water. Further, the catalyst on the insert reacts with dissolved oxygen in the water to produce reactive oxygen species. These reactive species react with and decompose organic compounds in the water, and kill or inactivate pathogens. In addition, the reactive oxygen species further react with the water itself to produce additional free radical species, which also react with and decompose organic compounds and kill or inactivate pathogens.

A humidifier includes a storage water tank configured to accommodate a predetermined amount of water; a circulation water tank having a smaller capacity than the storage water tank and including a circulation low water level sensor; a supply pump configured to supply water from the storage water tank to the circulation water tank; a circulation pump configured to supply water from the circulation water tank to a humidifying member; a residual water tank configured to accommodate water discharged from the circulation water tank; a drainage member disposed between the circulation water tank and the residual water tank selectively to discharge water from the circulation water tank to the residual water tank and a processor configured to control the drainage member to discharge water from the circulation water tank to the residual water tank when a low water level signal is received from the circulation low water level sensor.

A humidifier includes a storage water tank configured to accommodate a predetermined amount of water; a circulation water tank having a smaller capacity than the storage water tank and including a circulation low water level sensor; a supply pump configured to supply water from the storage water tank to the circulation water tank; a circulation pump configured to supply water from the circulation water tank to a humidifying member; a residual water tank configured to accommodate water discharged from the circulation water tank; a drainage member disposed between the circulation water tank and the residual water tank selectively to discharge water from the circulation water tank to the residual water tank and a processor configured to control the drainage member to discharge water from the circulation water tank to the residual water tank when a low water level signal is received from the circulation low water level sensor.

A water treatment system comprises an actinic radiation reactor, an electrochemical cell configured to produce hydrogen peroxide and having an outlet in fluid communication between a source of electrolyte and the actinic radiation reactor, and a source of oxygen in communication with an inlet of the electrochemical cell.

A water treatment system comprises an actinic radiation reactor, an electrochemical cell configured to produce hydrogen peroxide and having an outlet in fluid communication between a source of electrolyte and the actinic radiation reactor, and a source of oxygen in communication with an inlet of the electrochemical cell.

Disclosed is a device for analysing water and a swimming pool equipped with such a device. The device includes: an analysis chamber provided with at least one water inlet and at least one water outlet; a sealed housing adjacent to the analysis chamber and isolated from the analysis chamber by a partition; a data processor housed in the sealed housing; at least one probe electrically connected to a data input of the data processor; an electrical power supply electrically connected to a power input of the data processor, the electrical power supply having an electrical generator provided with a turbine housed in the analysis chamber, the electrical generator being electrically connected to the data input of the data processor. The device is useful for monitoring the sanitary state of the water of a swimming pool.

A sanitation device for cleaning a body of water in an immersion pool of a mikvah has a housing, a driving member and a bypass passageway. The housing includes an inlet, an outlet and internal liquid passages that communicate between the inlet and outlet. The driving member is arranged to urge flow of liquid through the internal liquid passages by exerting thrust upon liquid flowing through the driving member, wherein at least part of the liquid flowing through the liquid passages bypasses flowing through the driving member by flowing through the bypass passageway towards the device's outlet.