An electric dust collecting device according to the invention includes an electric charging unit for electrically charging dust in air, a first filter unit including a plurality of discharge electrode plates spaced apart from each other to define passages therebetween through which dust electrically charged by the electric charging unit passes, and a second filter unit disposed downstream of the plurality of discharge electrode plates in an air flow direction and connected to a ground to cause corona discharge between the plurality of discharge electrode plates and the second filter unit and to collect electrically charged dust. Dust particles electrically charged by the electric charging unit pass through the passages of the first filter unit and then are collected at the second filter unit, and dust particles electrically charged between the first filter unit and the second filter unit are electrically charged by the second filter unit, thus improving electric charging efficiency and dust collecting efficiency.

A rotor of a rotating motor includes a boss into which a shaft is inserted, a rotor yoke provided on a side of an outer circumference of the boss and formed of a plurality of pole pieces connected into a circular ring shape, and a coupling member made of resin with which the boss and the rotor yoke are integrally molded. Each of the plurality of pole pieces is provided with an injection hole that is bored in an axial direction and into which the resin is injected in the integral molding.

A method and apparatus for an inline air purification system is described herein. An example apparatus includes a housing, a high-velocity air flow guide, a filter assembly, and a fan. The high-velocity air flow guide includes a first portion and a second portion. The first portion is configured to form a passage within the housing, and the second portion is configured to divert and accelerate air flow of the ambient air from the passage to a chamber of the housing. The filter assembly includes one or more filtering elements configured to receive the ambient air from the chamber. The fan is configured to draw the ambient air from the chamber through the filter assembly and to generate processed air from the ambient air. The housing is located in an HVAC duct, and occupies only part of the cross-sectional area of the duct. The remaining area of the duct accommodates bypass air flow to a primary fan in the HVAC system.

A device for measuring floating micro-organisms and an air conditioner including a device for measuring floating micro-organisms are provided. The device for measuring floating micro-organisms may include an air flow path through which air including floating micro-organisms may flow, a first main body provided at a first side of the air flow path and having a first space and a second space, a second main body provided at a second side of the air flow path and in which a collecting portion to collect the floating micro-organisms may be provided, a light emitter provided in the first space that emits a predetermined wavelength range of light toward the collecting portion, and a light receiver provided in the second space that detects a fluorescence signal generated from light which acts on riboflavin contained in the floating micro-organisms.

A multi-function air purifying and sterilizing system for filtering and/or sterilizing air comprises: (a) a casing having an air inlet at one end of the casing and an air outlet at the other end of the casing, (b) electrostatic means for attracting particulate matter including biological contaminants, and thus, for removing the particulate matter and the biological contaminants from an air stream passing therethrough, the electrostatic means comprising at least one spiked surface, the at least one spiked surface inducing corona discharge and/or cold plasma when high voltage is applied, the corona discharge and/or the cold plasma producing ozone molecules, (c) at least one energy source for producing rays, the at least one energy source is inter-displaced within the electrostatic means to have the produced rays in close proximity to the electrostatic means for maximizing the at least one energy source efficiency in demolishing the particulate matter and the biological contaminants depositing on the electrostatic means, and/or converting the ozone molecules to hydroxyl radicals, the hydroxyl radicals disinfecting and inhibiting the biological contaminants and/or odors, and/or gases in the air stream, the hydroxyl radicals is spreadable within a confined space, thus, disinfecting biological contaminants and/or odors, and/or gases within a confined space.

A multi-function air purifying and sterilizing system for filtering and/or sterilizing air comprises: (a) a casing having an air inlet at one end of the casing and an air outlet at the other end of the casing, (b) electrostatic means for attracting particulate matter including biological contaminants, and thus, for removing the particulate matter and the biological contaminants from an air stream passing therethrough, the electrostatic means comprising at least one spiked surface, the at least one spiked surface inducing corona discharge and/or cold plasma when high voltage is applied, the corona discharge and/or the cold plasma producing ozone molecules, (c) at least one energy source for producing rays, the at least one energy source is inter-displaced within the electrostatic means to have the produced rays in close proximity to the electrostatic means for maximizing the at least one energy source efficiency in demolishing the particulate matter and the biological contaminants depositing on the electrostatic means, and/or converting the ozone molecules to hydroxyl radicals, the hydroxyl radicals disinfecting and inhibiting the biological contaminants and/or odors, and/or gases in the air stream, the hydroxyl radicals is spreadable within a confined space, thus, disinfecting biological contaminants and/or odors, and/or gases within a confined space.

An air conditioner includes: a first heat exchanger disposed indoors; a second heat exchanger disposed outdoors and connected to the first heat exchanger; a water tank for accommodating water for generating steam; a filtering device for filtering indoor air; a first valve, which guides, to the water tank, the water for generating steam or guides, to the outdoors, remaining substances generated in the filtering device or condensate water generated in the first exchanger; and a second valve which is connected to the first valve by means of a connecting pipe, and which receives the water for generating steam or discharges the remaining substances or the condensate water transferred from the first valve.

An air conditioner includes: a first heat exchanger disposed indoors; a second heat exchanger disposed outdoors and connected to the first heat exchanger; a water tank for accommodating water for generating steam; a filtering device for filtering indoor air; a first valve, which guides, to the water tank, the water for generating steam or guides, to the outdoors, remaining substances generated in the filtering device or condensate water generated in the first exchanger; and a second valve which is connected to the first valve by means of a connecting pipe, and which receives the water for generating steam or discharges the remaining substances or the condensate water transferred from the first valve.

Provided is an air conditioner including: a housing including an inlet and an outlet; a heat exchanger within the housing, wherein the heat exchanger is configured to heat exchange with air drawn in through the inlet; a blower fan configured to cause the heat exchanged air to be discharged through the outlet; and a sterilizer configured to irradiate light toward the blower fan; wherein the sterilizer includes: a first light-emitting diode (LED) including a first irradiation surface; and a second LED including a second irradiation surface, wherein the first irradiation surface faces a first direction, and wherein the second irradiation surface faces a second direction different from the first direction.

An air conditioner including a body having an evaporator for heat-exchanging air flowing in the body, and an air purifying module coupled to the body. The air purifying module may have a light emitting diode part disposed along a flow path of the air to provide ultraviolet rays, and a filter part disposed adjacent to the light emitting diode part.