| 摘要 |
<p>In a humidifier, an evaporator comprises a vessel containing two or more spaced vertical electrodes across which a voltage can be applied. The current which flows depends on the cross-section of the immersed portion of the electrodes, the size shape and spacing of the electrodes, the applied voltage and the conductivity and volume of the water. The invention provides a probe for measuring the conductivity of the water in the vessel and replacing some of the water in the vessel with fresh water when necessary to reduce the conductivity to the value for which the evaporator is designed. The probe may be connected directly into the evaporator vessel or it may be connected into a sampling vessel. In the latter case, a timer causes samples to be drawn at intervals and tested by the probe.</p> |
