Forest air in the room. Scheme, description

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Forest air in the room. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Medicine

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It is known that negative air ions have a beneficial effect on the human body, while positive ones contribute to its rapid fatigue. Numerous studies have shown that the air of forests and meadows contains from 700 to 1500, and sometimes up to 15 negative air ions in one cubic centimeter. In residential premises, their number sometimes drops to 000 in 25 cm1.

Everyone can increase the saturation of the air in the home with air ions by making an ionizer for themselves, consisting of an electro-fluvial chandelier and a high-voltage converter. An electro-fluvial chandelier (Fig. 1) is an emitter of negative air ions. It consists of a square base made of wire 2 mm in diameter, and a grid of wire 1 mm in diameter, in the nodes of which sharpened needles made of wire 0,3 mm in diameter are soldered. From the corners to the center of the square are four conductors soldered together. A high voltage is applied to this point, and the chandelier is suspended from the ceiling through the insulator.

Forest air in the room
Ris.1

The thyristor high-voltage converter consists of a step-down power transformer T1 (Fig. 2), a rectifier on VD1, a storage capacitor C1, a high-voltage transformer T2 and a thyristor-III control unit winding T1, R2, VD2.

Forest air in the room
Ris.2

The converter works as follows. The winding current 11 of the transformer T1 in the first half-cycle charges the storage capacitor C1 through the diode VD1 and the winding I T2. The diode VD2 is locked at this time, and the thyristor VS1 is closed. In the second half-cycle, the thyristor opens through the diode VD2. VD1 for the second half-cycle is locked, therefore, a short circuit through the thyristor is excluded. At this time, the capacitor C1 begins to discharge through the thyristor and winding 1 of the transformer T2. In the winding 11 T2, a high voltage is induced, which is supplied to the chandelier through a rectifier and a high-voltage PV wire.

Instead of the thyristor KU201L, you can use KU202K. It is unacceptable to use triacs (for example, KU208). T1 - any small-sized transformer from a lamp radio (wind yourself - on the Sh19 core, set thickness 30 mm: 1 winding - 2120 turns PEL 0,2; 11 winding - 2120 turns PEL 0,2; III winding - 66 turns PEL 0,2 ). T2 - high-voltage coil from the electronic ignition unit of the Ural chainsaw or magneto. It can be made from a core and a high-voltage coil from a TV-set such as UNT-35 ("Record-66", "Dawn"). Wind the primary winding yourself with a PEL 0,51 wire in the amount of 200 turns.

Instead of a high-voltage column VT-18 / 0,2, 5GE600AF can be used. Insulate the high-voltage wire only with PVC tape. Before turning on the converter for the first time at point A, connect a 220 V lamp. If the lamp lights up after switching on, swap the terminals III of the T1 winding. If after that a high voltage appears, but the lamp continues to glow at least slightly, increase the resistance of the resistor R2.

During the operation of the air ionizer, there should be no odors - this is a sign of the appearance of harmful gases that occur when high voltage leaks to the case or nearby parts.

Precautionary measures. When setting up and operating the converter, electrical safety must be observed. The high voltage current strength is limited to 2 μA, that is, thousands of times less than the maximum allowable, but this does not mean that you can touch the chandelier with impunity without receiving a strong prick from the discharge spark.

The operation of the converter is judged by a slight crackle around the chandelier. The duration of a daily session is about 30 minutes. In rooms with insufficient ventilation, turn on periodically throughout the day.

Author: N. Semakin

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