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.

An aspect of this electrical device includes: a body controller which controls the electrical device; a voltage generator which generates a voltage supplied to the electrical device; a wiring which connects the body controller to the voltage generator; and an electrical device casing which accommodates the body controller and the voltage generator, wherein the electrical device casing includes: a wiring chamber in which the wiring is arranged; a first chamber in which the body controller is accommodated; and a second chamber in which the voltage generator is accommodated, wherein an inside of the first chamber and an inside of the second chamber are connected to each other through the inside of the wiring chamber.

An air conditioner includes a housing including an outlet, a panel attachable to or detachable from a lower side of the housing and including an inlet to introduce air therethrough, a first filter installable to the panel to filter the introduced air, a second filter installable to the panel and configured to further filter the introduced air using an electrostatic force, and a lifter configured to detach the panel from the lower side of the housing by lowering the panel from an initial position, and to attach the panel to the lower side of the housing by lifting the panel from a maintenance position. When the panel is lowered to the maintenance position, one or more of the first filter and the second filter are accessible for maintenance thereon.

An air conditioner includes a housing including an outlet, a panel attachable to or detachable from a lower side of the housing and including an inlet to introduce air therethrough, a first filter installable to the panel to filter the introduced air, a second filter installable to the panel and configured to further filter the introduced air using an electrostatic force, and a lifter configured to detach the panel from the lower side of the housing by lowering the panel from an initial position, and to attach the panel to the lower side of the housing by lifting the panel from a maintenance position. When the panel is lowered to the maintenance position, one or more of the first filter and the second filter are accessible for maintenance thereon.

An air conditioner according to an aspect of the present disclosure includes a wall-mounted indoor unit which includes a heat exchanger, a blower, and a housing that accommodates the heat exchanger and the blower therein, and which is fixed to a wall surface, and a discharge unit which is disposed above the indoor unit outside the indoor unit, in which the housing includes a suction port that opens upward, the discharge unit includes a discharge device disposed above the suction port, at least a portion of air suctioned into the suction port passes through the discharge device, and a center of the discharge unit in a right-left direction of the indoor unit is disposed to be shifted to one side in the right-left direction with respect to a center of the indoor unit.

An air conditioner is provided that may include a case having an inlet and an outlet; a heat exchanger disposed inside of the case; a fan disposed inside of the case and elongated in a direction of a rotational axis of the fan; a guide that extends toward the outlet in a rotational direction of the fan; and a sterilizer mounted to the guide at a position facing the fan, and provided with a lamp that extends in a direction in which the fan extends, thereby providing a uniform sterilizing effect in a longitudinal direction of the fan.

An air conditioner according to an aspect of the present disclosure includes a wall-mounted indoor unit which includes a heat exchanger, a blower, and a housing that accommodates the heat exchanger and the blower therein, and which is fixed to a wall surface, and a discharge unit which is disposed above the indoor unit outside the indoor unit, in which the indoor unit includes a first control unit that controls the indoor unit, the housing includes a suction port that opens upward, the discharge unit includes a discharge device disposed above the suction port, at least a portion of air suctioned into the suction port passes through the discharge device, and the discharge device is driven based on a signal received from the first control unit.

An air conditioner according to an aspect of the present disclosure includes a wall-mounted indoor unit which includes a heat exchanger, a blower, and a housing that accommodates the heat exchanger and the blower therein, and which is fixed to a wall surface, and a discharge unit which is disposed above the indoor unit outside the indoor unit, in which the indoor unit includes a first control unit that controls the indoor unit, the housing includes a suction port that opens upward, the discharge unit includes a discharge device disposed above the suction port, at least a portion of air suctioned into the suction port passes through the discharge device, and the discharge device is driven based on a signal received from the first control unit.

A reticular resin molding has a plate form, is composed of a thermoplastic resin, includes a plurality of vent holes penetrating in a thickness direction, and is capable of increasing a heat exchange efficiency in a heat exchanger by introducing air, having passed through the vent holes to control a charge thereof, into the heat exchanger. The reticular resin molding is composed of a thermoplastic resin of polyethylene or polypropylene obtained by dissolving therein a non-fired powder of a montmorillonite-based clay mineral. Further, the operating method of an air conditioner comprises providing, to the heat exchanger, this reticular resin molding so as to cross an airflow path to a heat exchanger, and introducing the air, having passed through the vent holes, into the heat exchanger.

A reticular resin molding has a plate form, is composed of a thermoplastic resin, includes a plurality of vent holes penetrating in a thickness direction, and is capable of increasing a heat exchange efficiency in a heat exchanger by introducing air, having passed through the vent holes to control a charge thereof, into the heat exchanger. The reticular resin molding is composed of a thermoplastic resin of polyethylene or polypropylene obtained by dissolving therein a non-fired powder of a montmorillonite-based clay mineral. Further, the operating method of an air conditioner comprises providing, to the heat exchanger, this reticular resin molding so as to cross an airflow path to a heat exchanger, and introducing the air, having passed through the vent holes, into the heat exchanger.