Dryer

A dryer comprising:

• a rotating drum;
• a lifter positionable on an inner surface of the rotating drum, the lifter formed to include an accommodation space;
• an energy harvester including a cylinder positionable in the accommodation space of the lifter so that while the energy harvester is accommodated in the accommodation space, the energy harvester generates power while the rotating drum rotates;
• a humidity sensor, positionable in the accommodation space of the lifter so that while the humidity sensor is accommodated in the accommodation space, the humidity sensor receives the power generated by the energy harvester and senses humidity;
• a circuit board, positionable in the accommodation space of the lifter, so that while the circuit board is accommodated in the accommodation space, the humidity sensor is disposed on the circuit board;
• and
• an air passage formed through the lifter and guide air inside the rotating drum to pass to the humidity sensor through the lifter,
• wherein the cylinder of the energy harvester is disposed so that a central axis of the cylinder forms a predetermined angle rather than zero (0) degree with respect to a Y axis that passes through an upper surface of the lifter and is parallel to a central axis of the rotating drum.