An air purification device (100) comprising a housing (102) defining an air inlet (110), an air outlet (112), and an airflow pathway (114) extending from the air inlet (110) to the air outlet (112); a liquid reservoir (130) disposed across the airflow pathway (114) between the air inlet (110) and the air outlet (112); an ultraviolet (UV) light source (210) disposed in the housing (102), wherein the UV light source (210) is positioned to emit UV light into the airflow pathway (114); and an electrostatic precipitator (310) disposed across the airflow pathway (114).

An air purifier comprising a removable particulate or gas filter, an air flow generator, a means for controlling said air flow generator, a first air flow setting with an air filtration air flow speed and a second air flow setting which correlates with sterilisation of an internal surface of the air purifier and/or removable particulate or gas filter. A method for sterilising an internal surface of an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for sterilising an internal surface of an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for sterilising a removable filter in an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for preventing microbial growth on an internal surface of or a removable filter rom an air purifier by activating the air flow generator.

An air purifier comprising a removable particulate or gas filter, an air flow generator, a means for controlling said air flow generator, a first air flow setting with an air filtration air flow speed and a second air flow setting which correlates with sterilisation of an internal surface of the air purifier and/or removable particulate or gas filter. A method for sterilising an internal surface of an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for sterilising an internal surface of an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for sterilising a removable filter in an air purifier according to any preceding claim by generating an air flow correlating with said second air flow setting. A method for preventing microbial growth on an internal surface of or a removable filter rom an air purifier by activating the air flow generator.

An electrostatic filter unit for an air cleaning device includes an ionization unit for charging a particle contained in an air flow, a separation unit arranged downstream of the ionization unit in a direction of flow of the air, with the separation unit including at least two collecting electrodes which are air-permeable, and a protection element for at least one element of the ionization unit.

An electrostatic filter unit for an air cleaning device includes an ionization unit for charging a particle contained in an air flow, a separation unit arranged downstream of the ionization unit in a direction of flow of the air, with the separation unit including at least two collecting electrodes which are air-permeable, and a protection element for at least one element of the ionization unit.

A portable air purifier comprising a removable filter, an air flow generator, a temperature sensor, a humidity sensor, a processor for processing input from the temperature sensor and the humidity sensor, and means for activating said air flow generator from a stand-by configuration based on input from both said temperature and humidity sensors and a method for activating an air flow generator in a portable air purifier in stand-by mode, by obtaining information as to ambient temperature from a temperature sensor, obtaining information as to ambient humidity from a humidity sensor, determining likelihood of microbial growth on a removable filter in the purifier and, where conditions are such that microbial growth is of a defined quantum, activating the air flow generator.

A portable air purifier comprising a removable filter, an air flow generator, a temperature sensor, a humidity sensor, a processor for processing input from the temperature sensor and the humidity sensor, and means for activating said air flow generator from a stand-by configuration based on input from both said temperature and humidity sensors and a method for activating an air flow generator in a portable air purifier in stand-by mode, by obtaining information as to ambient temperature from a temperature sensor, obtaining information as to ambient humidity from a humidity sensor, determining likelihood of microbial growth on a removable filter in the purifier and, where conditions are such that microbial growth is of a defined quantum, activating the air flow generator.

An ionized air delivery system, such as a vehicle ionized air delivery system, includes an outlet body that is situated within a duct of a heating, ventilation, and air conditioning (HVAC) system. The outlet body delivers ions to air flow in the duct of the HVAC system. The outlet body has an outer surface that is generally spherical at a region of the outer surface that confronts the air flow in the duct. Further, the outlet body has an outlet passage with a primary axis that is directed away from an exit of the duct of the HVAC system. Air flow in the duct passes across an exit opening of the outlet body and draws ions out of the outlet passage to mix with the air flow in the duct of the HVAC system.

An ionized air delivery system, such as a vehicle ionized air delivery system, includes an outlet body that is situated within a duct of a heating, ventilation, and air conditioning (HVAC) system. The outlet body delivers ions to air flow in the duct of the HVAC system. The outlet body has an outer surface that is generally spherical at a region of the outer surface that confronts the air flow in the duct. Further, the outlet body has an outlet passage with a primary axis that is directed away from an exit of the duct of the HVAC system. Air flow in the duct passes across an exit opening of the outlet body and draws ions out of the outlet passage to mix with the air flow in the duct of the HVAC system.

A ventilation type air cleaner includes a housing having a central rotating shaft including a purification part, a washing part, and a sterilization part in a circumferential direction with respect to the central rotating shaft, a rotating unit installed to be rotatable about the central rotating shaft as a rotation center in the housing, a filter assembly detachably coupled to the rotating unit and configured to sequentially pass through the purification part, the washing part, and the sterilization part according to rotation of the rotating unit, an intake duct connected to the housing and configured to guide a flow of air introduced to the purification part, and an exhaust duct connected to the housing and configured to guide a flow of air discharged from the purification part.