| 摘要 |
PROBLEM TO BE SOLVED: To facilitate a confirmation of a water level of water stored in a feed water tank. SOLUTION: A humidifier comprises a daylighting window 6 having an opening 6a and a lens 6b engaged within the opening 6a and provided on a front part of an upper surface of a body. Thus, when the water level of the feed water tank 10 is confirmed in a legible window 5 on the front surface of the body, a light incident from the window 6 is reflected on the surface of the water stored in the tank 10, a contrast is generated in a part in which the water is filled and a part in which no water is filled, and hence the confirmation of the water level is facilitated.
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