Disclosed is a powerless humidification module for an air cleaner which is capable of preventing leakage of water into the air cleaner. A powerless humidification module for an air cleaner which is detachably mounted on an upper portion of a body of the air cleaner and is capable of preventing leakage of water includes a base cover having a first opening opened toward the air cleaner and a second opening opened toward a side surface of the first opening, a cistern part located in the interior of the base cover and located such that a space defined between an inner partition wall and an outer partition wall having predetermined heights such that water supplied to one side thereof is stored surrounds a periphery of the first opening whereby water supplied to one side thereof is stored, and a humidification filter located in the second opening.

Disclosed is a powerless humidification module for an air cleaner which is capable of preventing leakage of water into the air cleaner. A powerless humidification module for an air cleaner which is detachably mounted on an upper portion of a body of the air cleaner and is capable of preventing leakage of water includes a base cover having a first opening opened toward the air cleaner and a second opening opened toward a side surface of the first opening, a cistern part located in the interior of the base cover and located such that a space defined between an inner partition wall and an outer partition wall having predetermined heights such that water supplied to one side thereof is stored surrounds a periphery of the first opening whereby water supplied to one side thereof is stored, and a humidification filter located in the second opening.

An air purifier includes a display mounted between a front panel of a cabinet of the air purifier and an upper panel of the cabinet. The front panel includes a door which is configured and supported to be drawn in to the cabinet toward the display or drawn out from the cabinet away from the display. A display module including the display is disposed below the upper panel.

An air purifier includes a display mounted between a front panel of a cabinet of the air purifier and an upper panel of the cabinet. The front panel includes a door which is configured and supported to be drawn in to the cabinet toward the display or drawn out from the cabinet away from the display. A display module including the display is disposed below the upper panel.

Voltage application device includes voltage application circuit. Voltage application circuit applies a voltage to load including discharge electrode that holds liquid, voltage application circuit generating discharge in discharge electrode. During a drive period, voltage application circuit periodically changes a magnitude of the voltage applied to load at a drive frequency within a predetermined range including a resonance frequency of liquid, voltage application circuit mechanically vibrating liquid.

A mister-fan apparatus includes: a housing having a fan end and a reservoir end; at the fan end, a fan unit; at the reservoir end, a reservoir; a motor; a pump; an inlet conduit from the reservoir to the pump; and an outlet conduit from the pump to the fan unit, collectively configured for, through the use of the inlet and outlet conduits, pumping fluid from the reservoir to the fan unit so that the fan can output mist; a track peripherally surrounding the housing at least partway around; an attaching device having an attaching end and an extension end; a tongue having a track end, and a connection end connected to the extension end; and, within the track, a retaining slider connected to the track end; wherein the attaching end is configured for removably attaching to an external structure for supporting the apparatus. The track may include a pair of ridges, rigidly connected to the housing, that extend initially outwardly from the housing, and later toward each other but only to an extent of leaving a separation serving as a slot.

The present invention provides an air purifier including a plurality of bi-directional fans, which are arranged to be misaligned in a vertical direction such that the discharge directions of discharge ports are different from each other.

A method by a controller of a cooling system includes calculating a difference between a first temperature of ambient air and a second temperature of pre-cooled air. The pre-cooled air is ambient air that has been cooled by water from a water distribution system before it enters one or more condenser coils. The method further includes determining that the difference between the first and second temperatures is less than or equal to a predetermined temperature difference, and in response, determining that the first temperature is greater than or equal to a minimum temperature. The method further includes, if the first temperature is greater than or equal to the minimum temperature, instructing the water distribution system to distribute the water to pre-cool the ambient air for a predetermined length of time and to disable the distribution of the water after the predetermined amount of time has elapsed.

Systems and methods to treat an environment. The system includes a plurality of scent control material sources configured to output a scent control material (e.g., an oxidant) into the environment to reduce pathogens, dispose of scent molecules and their sources, and otherwise treat the environment. The system can include a controller communicatively coupled to the plurality of scent control material sources and cause one or more subsets of the plurality of scent control material sources to individually or collectively output scent control material into the environment.

The combination of: a) an apparatus with a main body and an operating assembly on the main body configured to cause fluid from a supply to be processed so as to become entrained in air in a surrounding atmosphere, wherein the main body has an elongate finger having a length and a free end; and b) a container defining a receptacle for a supply of fluid. The container has an entry opening that is dimensioned to allow the elongate finger on the main body to be directed, free end first, through the entry opening to allow a portion of the length of the elongate finger to be immersed in a supply of fluid in the receptacle. Structure cooperates between the apparatus and container to support the main body and container in an operative relationship.