Abstract: A fan motor includes a heat dissipation fin. The heat dissipation fin includes an outer ring part, an inner ring part disposed inside the outer ring part, and a connection part connecting the outer ring part and the inner ring part. The inner ring part is elastically deformed to be inclined in parallel to a rotational shaft which is inclined when axial alignment between bearings is not made. Accordingly, the heat dissipation fin can reduce a temperature of the bearing while enclosing the bearing, and improve concentricity (axial alignment) of the bearing.

Abstract: Provided may be a hair dryer comprising: a main body part including a gas outlet part; a handle extending downwardly from the main body part and including a handle case and an air inlet part; an airflow path extending from the air inlet part to the gas outlet part through which gas flows; a fan unit provided inside the handle and flowing gas; and a battery module provided inside the handle and disposed on the airflow path, wherein the battery module is located below the fan unit, the airflow path includes a lower passage formed by a space spaced apart between the handle case and the battery module, and the air inlet part is formed at a position corresponding to the lower passage, such that the hair dryer can safely and efficiently arrange the fan unit and the battery module inside the handle.

Abstract: A hair dryer, which can be used simultaneously in wired and wireless manners, comprises: a main body comprising a gas discharge part through which a gas is discharged to outside; a handle part which is extended downward from the main body and includes a gas inlet part through which the gas flows in from outside; a gas flow path comprising a first flow path which is connected to the gas inlet part and located in the handle portion, and a second flow path which is extended from the first flow path to the gas discharge part and located in the main body; a temperature adjusting unit located on the second flow path; a battery module mounted in the handle portion; a power terminal which supplies electric power to the battery module; and a controller which switches from a direct current mode to an alternating current mode when the electric power is supplied through the power terminal.

Abstract: Provided is a thin film including Mo1-xWxTe2 stacked in a plurality of layers. The thin film has a thickness of about 1 nm to about 100 nm in a stacking direction, has a symmetric lattice structure at a temperature higher than a threshold temperature, and has an asymmetric lattice structure at a temperature equal to or lower than the threshold temperature.

Abstract: A fan motor is disclosed. The fan motor includes a rotating shaft, a motor, a bearing, a bearing housing, a preload applying device, and a bush. The preload applying device is disposed between one axial end of the bearing and the bearing housing, and applies force to the one axial end of the bearing in an axial direction by using elastic force. The bush is coupled to an outer circumferential surface of the bearing and slidably mounted on an inner circumferential surface of the bearing housing in an axial direction. A protrusion is formed on one axial end portion of the bush, and a protrusion accommodating groove is formed on an axial inner surface of the bearing housing. Accordingly, the preload applying device can continuously apply an appropriate preload to the bearing, while the bush can suppress slipping of an outer ring of the bearing.

Abstract: A fan motor includes: a housing, a rotation shaft oriented across an inner center of the housing, an impeller located at a first side of the rotation shaft, a rotor connected to the rotation shaft and spaced apart from the impeller in an axial direction, a stator that surrounds the rotor, a first bearing located at a first end of the rotation shaft, a second bearing that is located at a second end of the rotation shaft and that is configured to rotatably support the rotation shaft, and a first bearing housing that accommodates and supports the first bearing, that is fixed inside the housing, and that is configured to guide a flow of air introduced into the housing.

Abstract: A fan motor includes a rotating shaft on which an impeller is mounted, a motor unit for driving the rotating shaft, a plurality of bearings supporting the rotating shaft, a spring serially disposed between the plurality of bearings to axially apply force to an outer ring of one of the plurality of bearings, and a cylinder brought into contact with the spring to transfer elastic pressing force of the spring to the outer ring of the bearing. Accordingly, by applying a preload to the outer ring of the bearing, a ball of the bearing can be restricted from moving axially and radially between the outer ring and an inner ring of the bearing. The spring has a structure that is surface-contactable and has a length shorter than a diameter, and does not require a separate cartridge such as a sleeve for fixing the spring.

Abstract: A fan motor is disclosed. The fan motor includes an impeller, a rotational shaft, a plurality of bearings, and a heat dissipation fin. The impeller is mounted on the rotational shaft. The plurality of bearings support the rotational shaft. The heat dissipation fin is mounted on the rotational shaft and includes rotating blades rotating centering on the rotational shaft. According to this, the heat dissipation fin may cool the bearing by using convection.

Abstract: Provided is a semiconductor device. The semiconductor device includes a phase change material layer on a substrate, a gate electrode disposed on the phase change material layer and inducing accumulation of charges in the phase change material layer, and a pair of source/drain electrodes spaced apart from each other with the gate electrode therebetween on the phase change material layer. The phase change material layer includes a phase change region having a crystal structure that changes due to the accumulation of the charges as a voltage is applied to the gate electrode.

Abstract: A fan motor is disclosed. The fan motor includes a heat dissipation fin. The heat dissipation fin includes an outer ring part, an inner ring part disposed inside the outer ring part, and a connection part connecting the outer ring part and the inner ring part. The inner ring part is elastically deformed to be inclined in parallel to a rotational shaft which is inclined when axial alignment between bearings is not made. Accordingly, the heat dissipation fin can reduce a temperature of the bearing while enclosing the bearing, and improve concentricity (axial alignment) of the bearing.

Abstract: Provided is a thin film including Mo1-xWxTe2 stacked in a plurality of layers. The thin film has a thickness of about 1 nm to about 100 nm in a stacking direction, has a symmetric lattice structure at a temperature higher than a threshold temperature, and has an asymmetric lattice structure at a temperature equal to or lower than the threshold temperature.

Abstract: A fan motor includes a housing, a rotating shaft that is rotatably disposed in the housing and extends through the housing, an impeller rotatably disposed at the rotating shaft, a first vane disposed adjacent to the impeller and configured to guide a flow of air generated by the impeller, a rotor disposed at the rotating shaft and spaced apart from the impeller in an axial direction of the rotating shaft, a stator that is disposed in the housing and surrounds the rotor, the stator and the rotor defining an air gap therebetween, and a second vane coupled to the stator and disposed downstream relative to the first vane in a flow direction of the flow of air. The second vane is in contact with at least a part of an inner surface of the housing.

Abstract: A fan motor includes a housing, a rotating shaft that is rotatably disposed in the housing and extends through the housing, an impeller rotatably disposed at the rotating shaft, a first vane disposed adjacent to the impeller and configured to guide a flow of air generated by the impeller, a rotor disposed at the rotating shaft and spaced apart from the impeller in an axial direction of the rotating shaft, a stator that is disposed in the housing and surrounds the rotor, the stator and the rotor defining an air gap therebetween, and a second vane coupled to the stator and disposed downstream relative to the first vane in a flow direction of the flow of air. The second vane is in contact with at least a part of an inner surface of the housing.

Abstract: A motor assembly includes a first bearing installed on a rotating shaft adjacent to an impeller to support a first support part of the rotating shaft, a second bearing installed on the rotating shaft adjacent to the rotor to support a second support part of the rotating shaft, a bearing bracket receiving the first and second bearings therein, an elastic member inserted between the first bearing and the bearing bracket or between the second bearing and the bearing bracket to press either the first bearing or the second bearing to get closer to each other, and a separation preventing member installed on the bearing bracket to fix the first bearing, the second bearing and the elastic member to an inner space of the bearing bracket such that at least one portion of the separation preventing member overlaps with one of the first bearing, the second bearing and the elastic member.

Abstract: The present embodiment comprises: a rotary shaft; a rotor mounted on the rotary shaft; a stator for encompassing the outer circumference of the rotor; an impeller mounted on the rotary shaft so as to be spaced from the rotor; a bearing housing having a through-hole through which the rotary shaft passes; a rolling bearing disposed in the bearing housing and coupled to the rotary shaft; and a gas bearing disposed in the bearing housing so as to be spaced from the rolling bearing in an axial direction, and facing the outer circumference of the rotary shaft.

Abstract: A motor assembly includes a rolling bearing installed on a rotation shaft between an impeller and a rotor to support a first support of the rotation shaft, and a motor housing having a stator. The motor housing has a gas bearing bracket for accommodating a second support of the rotation shaft disposed at a side opposite to the first support with respect to the rotor. The motor assembly includes a gas bearing assembly in the gas bearing bracket to support rotation of the second support of the rotation shaft. The gas bearing assembly includes a gas bearing for surrounding the second support. The gas bearing is spaced apart from the second support of the rotation shaft to define a gap therebetween when the rotation shaft rotates. The gas bearing assembly includes an elastic member interposed between the gas bearing bracket and the gas bearing to elastically support the gas bearing.

Abstract: A motor assembly includes a rotation shaft, an impeller installed at one side of the rotation shaft, a rotor mounted at the other side of the rotation shaft to be spaced apart from the impeller along an axial direction of the rotation shaft, a stator surrounding an outer face of the rotor such that the stator is spaced apart from the rotor along a radial direction of the rotation shaft, a first bearing installed at the one side of the rotation shaft between the impeller and the rotor, and a second bearing installed at the other side of the rotation shaft, opposite to the first bearing with respect to the rotor, and disposed to be axially closer to the other end of the rotation shaft than the rotor. An outer diameter of the first bearing is larger than an outer diameter of the second bearing.

Abstract: An embodiment of the present disclosure discloses a motor assembly including a rotation shaft, an impeller including a hub fastened to the rotation shaft, and a plurality of blades protruding outward from an outer surface of the hub, an inlet body for surrounding an outer circumference of the impeller, and a coating layer coated on an inner surface of the inlet body, wherein at least a portion of the coating layer is ground in a form of powder by friction with the plurality of blades during rotation of the impeller.

Abstract: A fan motor includes: a housing, a rotation shaft oriented across an inner center of the housing, an impeller located at a first side of the rotation shaft, a rotor connected to the rotation shaft and spaced apart from the impeller in an axial direction, a stator that surrounds the rotor, a first bearing located at a first end of the rotation shaft, a second bearing that is located at a second end of the rotation shaft and that is configured to rotatably support the rotation shaft, and a first bearing housing that accommodates and supports the first bearing, that is fixed inside the housing, and that is configured to guide a flow of air introduced into the housing.

Abstract: A fan motor includes a housing, a rotating shaft that is rotatably disposed in the housing and extends through the housing, an impeller rotatably disposed at the rotating shaft, a first vane disposed adjacent to the impeller and configured to guide a flow of air generated by the impeller, a rotor disposed at the rotating shaft and spaced apart from the impeller in an axial direction of the rotating shaft, a stator that is disposed in the housing and surrounds the rotor, the stator and the rotor defining an air gap therebetween, and a second vane coupled to the stator and disposed downstream relative to the first vane in a flow direction of the flow of air. The second vane is in contact with at least a part of an inner surface of the housing.