Humidifier. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Electronics in medicine
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In winter, air humidity in apartments is usually kept at 40%, while normal humidity should be at least 60%. This is explained by the fact that cold air coming from the street and having normal relative humidity becomes excessively dry in a well-heated room - after all, relative humidity depends on temperature. At this time of the year, it is best to install a humidifier in the apartment. You can make it from improvised materials.
Cut out two electrodes approximately 100x30 mm from the tin can. Lay between them two narrow transverse rubber gaskets. The gap between the electrodes should be about 7-8 mm. Then fasten the electrodes in the places of the gaskets with rubber rings or several turns of thick cotton or linen threads.
Solder the electrical wires to the plates as shown in the figure. Twist the wires and make a plug for them. All connections must be carefully soldered, and the wires must be well insulated. Place the device on the bottom of a glass or ceramic dish with a wide mouth. (Warning: do not use metal pans!) Fill the dishes with tap water almost to the top and turn on the device and the mains. The mineral salts contained in ordinary drinking water are quite enough for a current to flow through the gap between the electrodes and the water to heat up and boil. Its vapors will significantly increase the humidity in the room. Add water from time to time. If you forget to add water and it boils away, nothing bad will happen - the electrodes will be exposed, the electrical circuit will open, and the device will stop working.
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