A humidifier includes a humidifying device which generates humidified air; a display coupled to one side of the humidifying device, wherein the display includes: a display housing which is open toward the humidifying device; and a display substrate which is installed inside the display housing, wherein the humidifying device includes a coupling cover which extends in an outward direction, and covers the display housing.

A humidifier includes a humidifying device which generates humidified air; a display coupled to one side of the humidifying device, wherein the display includes: a display housing which is open toward the humidifying device; and a display substrate which is installed inside the display housing, wherein the humidifying device includes a coupling cover which extends in an outward direction, and covers the display housing.

A humidifier includes a humidifying device which generates humidified air; a water tank which has a water storage space open to an upper side, and supplies water to the humidifying device; and a water tank cover which covers the open upper side of the water tank, wherein the water tank cover comprises a water supply hole located in an upper side of the water storage space so that the supplied water falls into the water storage space, wherein the water supply hole is formed along a circumference of an upper end of the water tank.

A humidifier includes a humidifying device which generates humidified air; a water tank which has a water storage space open to an upper side, and supplies water to the humidifying device; and a water tank cover which covers the open upper side of the water tank, wherein the water tank cover comprises a water supply hole located in an upper side of the water storage space so that the supplied water falls into the water storage space, wherein the water supply hole is formed along a circumference of an upper end of the water tank.

A self-regulating appliance operable as an air-exchanger, humidifier, dehumidifier, air scrubber, and air sterilizer. The appliance includes a cabinet defining an interior with a plurality of fluid passageways, a first inlet configured to receive a first air flow from a dwelling interior, a second inlet configured to receive a second air flow from a dwelling exterior, a first outlet configured to deliver a third air flow to the dwelling interior, and a second outlet configured to deliver a fourth air flow to the dwelling exterior. At least one blower is fluidically coupled to the first and second outlets to expel the third air flow to the dwelling interior and the fourth air flow to the dwelling exterior. The cabinet also includes an energy exchange core and a desiccant wheel. The desiccant wheel configured to rotate to transfer moisture and sensible energy between at least two air streams.

A self-regulating appliance operable as an air-exchanger, humidifier, dehumidifier, air scrubber, and air sterilizer. The appliance includes a cabinet defining an interior with a plurality of fluid passageways, a first inlet configured to receive a first air flow from a dwelling interior, a second inlet configured to receive a second air flow from a dwelling exterior, a first outlet configured to deliver a third air flow to the dwelling interior, and a second outlet configured to deliver a fourth air flow to the dwelling exterior. At least one blower is fluidically coupled to the first and second outlets to expel the third air flow to the dwelling interior and the fourth air flow to the dwelling exterior. The cabinet also includes an energy exchange core and a desiccant wheel. The desiccant wheel configured to rotate to transfer moisture and sensible energy between at least two air streams.

The method for manufacturing the water tank according to the present disclosure includes: producing an upper cylinder of a water tank; producing a lower cap of the water tank; welding the upper cylinder and the lower cap; a first polishing step of using sandpaper having a first grit range; and a second polishing step of using sandpaper having a second grit range having a larger grit than the sandpaper having the first grit range.