Since negative ions can increase the oxygen carrying capacity of red blood cells, when people are in a large amount of negative ion environment such as forests, they will feel comfortable in the body. People call negative ions "air vitamins". The negative ion generator described in this paper can be placed in offices, bedrooms, computer rooms and other places to improve air quality and make the air fresh. 1. Circuit principle: The schematic diagram is shown in Figure 1. The 220V AC power is stepped down by the transformer T1, and the diodes D1 and D2 are fully rectified to form a DC voltage of about 20V, and the primary winding of the step-up transformer T2 is applied to the collector of the transistor BG1. At the same time, the 20v DC voltage is limited by R2, and D3 is stabilized to form a DC voltage of about 6V for the oscillation circuit. Figure 1 Negative ion generator circuit principle The time base integrated circuit NE555 and the peripheral components constitute an astable multivibrator. The NE5552 and 6-pin external components R3, R4, and c2 determine the oscillation frequency f=1.443/(R3+2R4)·C2, and the oscillation frequency in this circuit is about 5.2 kHz. The high-frequency square wave pulse generated by the oscillator is output from the NE5553 pin, and the pulse signal output from the 3-pin control switch BG1 is turned on, so that the 20V DC voltage is raised to a high voltage of about 8.9kv through the step-up transformer T2, and the high voltage is passed through the high voltage diode. D4 rectifies and discharges the board FJ. The electrodes are ionized at both ends of the electrode to generate negative ions. When the high pressure part is normal, since the negative ions can improve the oxygen carrying capacity of the red blood cells, when the light bulb LED3 is lit, it indicates that there is a high voltage. If the installation is inconvenient, the indication is installed in a large negative ion environment (such as a forest). The body can be omitted. 2. Component selection: transformer T1 secondary output voltage is 16.5v × 2 43cm black and white TV power transformer; step-up transformer with 43cm black and white TV high voltage package system: the original high voltage winding is retained as a high voltage output winding, with 0.3mm The high-strength enameled wire is wound around the bobbin as a primary winding on the BGlc pole and +20V power supply. Place the electrode with a 10cm × 10cm epoxy copper plate with a knife (the distance of the electrode should be ≥ 7.5mm or adjusted according to the actual situation, so as not to pull the fire). The remaining components are selected as listed in Table 1. After selecting the components and installing the circuit according to the text, you can work satisfactorily without any debugging. Note: If the working time of BGl is more than 2 hours, an aluminum piece with a volume of 5cm × 4cm should be added to dissipate heat. Negative ion generators use high-pressure corona to increase the negative ion content in the air, thereby improving air quality and promoting good health. It is known as "air vitamin". Medical clinical practice has proved that it has an auxiliary effect on diseases such as respiratory system, circulatory system and nerves, and thus has been widely used in the life and medical circles. This paper introduces a high-efficiency open-type negative ion generator, which adopts thyristor inverter high-voltage, floating discharge needle, which has simple structure, good effect, safety and reliability. The mains voltage can work normally at 160-250V, and the consumption of the electrode is only about 1W, so it can work continuously for a long time. The negative ion generator circuit is shown in Figure 1220V. The mains is rectified and current-limited by VD1, VD2 and R1, R2. The unidirectional pulsating current controls the on/off of VS to generate oscillation. After being boosted by transformer T, it is rectified by VD3 to obtain 10,000 volts. The negative high voltage on the left and right sides discharges to the air through discharge, generating ionization and generating negative ions. T can be modified by 14 å‹ black and white TV output transformer, all low voltage winding coils are removed, with Φ=0.35mm enameled wire or wire wrapped wire 28åŒ for L1, the original high voltage package is L2, R3 is anti-shock protection resistance, resistance It is 2 - 4 MΩ. Three discharge pins can be used with ordinary nickel-plated pins, and high-voltage terminals must be output with high-voltage lines in black and white. As long as the components are good and the soldering is correct, the circuit can work normally without debugging. The increase of negative ions has hypnosis, antiperspirant, analgesia and appetite for people, which makes people refreshed and relieves fatigue. As shown in the figure is a negative ion generator circuit diagram. 220V AC mains is recharged to C3 and C2 after being rectified by D1. When C2 is charged until the bubble is turned on and SCR is turned on, C3 is discharged through L1 of SCR and B, and after being boosted by B, it is reverse rectified by D2. A high voltage of 8 kV is used to ionize the molecules of the generator M to generate negative ions. Adjusting the resistance of R3 can change the trigger frequency and output voltage. Safety must be observed when adjusting, and the power plug must be disconnected when replacing components.
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Homemade negative ion generator method one