Abstract: Disclosed is an air purifier able to maintain the normal state of drive of a disk-shaped humidification filter by controlling the state of rotation of the humidification filter. The air purifier can maintain the normal state of drive of the humidification filter by using a stepping motor and the control unit in order to vary the state of rotation of the humidification filter and thereby remove extraneous material when the humidification filter is rotating abnormally due to extraneous material.

Abstract: A bidet having a variable nozzle. The bidet includes a linear channel connected to a feed channel through which water is fed, a nozzle part connected to the linear channel and ejecting the water toward an area of the human body to be washed, and a variable channel connected to opposite sides of the nozzle part and feeding the water to the nozzle part while the water to be ejected is pressurized symmetrically on the opposite sides of the nozzle part. Thereby, the bidet can adjust a spreading angle of the water ejected from the nozzle part according to an area to be washed.

Abstract: An apparatus for purifying and humidifying air which enables separate supply of purified air and humidified air and controls the amount of humidified air discharged and which includes dual flow paths to increase the efficiency of air transfer. The apparatus includes a case having a suction port through which external air is introduced thereinto and a discharge port through which the introduced air is discharged, a circulation fan for causing the introduced air to flow toward the discharge port, a filter unit disposed in the case to filter the introduced air, a humidification unit disposed at a low position in the case to supply the air passed through the filter unit with moisture, and a flow path control unit disposed between the suction port and the humidification unit to control flow of the air passed through the filter unit.