| 摘要 |
A portable humidifier including an evaporator pan adapted to be mounted in the plenum of a furnace, a heating element in the evaporator pan connected to the furnace motor circuit, a reservoir mounted at a point remote from the evaporator pan and at the same level, a conduit connecting the reservoir to the evaporator, a source of water connected to the reservoir through a restricted conduit, a solenoid actuated control valve connected to control the flow of water through the restricted conduit and a double acting mercury switch mounted on a float in the reservoir to control the operation of the solenoid valve and to disable the heating element when the water in the evaporator pan drops below the heating element.
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