Abstract: 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.

Abstract: An air conditioner includes: a housing having an inlet on one side thereof and an outlet on another side thereof; a fan disposed in the housing and by which air flows from the inlet to the outlet; and an electrostatic dust collector disposed in the housing and configured to remove foreign matter from air introduced into the inlet, allowing the air introduced into the inlet to be filtered. The electrostatic dust collector includes: at least one electrostatic filter including a first side wall and a second side wall disposed in an opposite direction to the first side wall; a first filter handle coupled to the first side wall; and a second filter handle coupled to the second side wall.

Abstract: An air conditioner includes an electrostatic dust collector configured to remove foreign matter from air introduced into an inlet of a housing, wherein the electrostatic dust collector includes: at least one electrostatic filter configured to filter foreign matter from air and including a first side wall and a second side wall disposed in an opposite direction to the first side wall; a first filter handle slidingly coupled to the first side wall and detachably coupled to one side of the housing; and a second filter handle slidingly coupled to the second side wall and detachably coupled to another side of the housing, and wherein the first side wall has a structure corresponding to the second side wall.

Abstract: A method may achieve an agreement among a plurality of nodes executed by one or a plurality of processors of a blockchain system including a distributed network of the plurality of nodes. The method may comprise: receiving a candidate block in a N-th round (N is a positive integer) by an arbitrary node among the plurality of nodes able to be promoted to producer nodes having a block generation status at a predetermined time for each round, determining whether the received candidate block is a valid candidate block, determining whether the valid candidate block is an unapproved block, and determining whether to vote for approval of the unapproved block by determining whether the unapproved block is a first received candidate block which is a first received candidate block within the N-th round by the arbitrary node.

Abstract: A method may achieve an agreement among a plurality of nodes executed by one or a plurality of processors of a blockchain system including a distributed network of the plurality of nodes. The method may comprise: receiving a candidate block in a N-th round (N is a positive integer) by an arbitrary node among the plurality of nodes able to be promoted to producer nodes having a block generation status at a predetermined time for each round, determining whether the received candidate block is a valid candidate block, determining whether the valid candidate block is an unapproved block, and determining whether to vote for approval of the unapproved block by determining whether the unapproved block is a first received candidate block which is a first received candidate block within the N-th round by the arbitrary node.