Utilize high-voltage ionization(Or chemical, photochemical reactions)The process of decomposing and polymerizing part of the oxygen in the air into ozone is an allotrope transformation of oxygen;It can also be obtained by electrolyzing water. The instability of ozone makes it difficult to store in bottles Generally, only on-site production with an ozone generator can be carried out, and it can be used immediately after production. Classification of ozone generators According to the way ozone is produced, there are mainly three types of ozone generators:The first is high-voltage discharge type, the second is ultraviolet irradiation type, and the third is electrolytic type.

CircuitThe circuit of the folding ozone generator consists of a transistorVT1,VT2And inductor coilL1one13Pulse transformerTCurrent-limiting resistorR1Charging capacitorC3,Bidirectional trigger diode5They form a push-pull oscillation circuit, etc;Filter inductor coilL0,Rectifier diodeVD1And filter capacitorC1,C2They form a half-wave rectifier filter circuit, etc. Connect the power supply and switch to alternating current220VVoltageLOFilteringVD1After rectification, inC1Ten is generated at both ends280VThe left and right voltages supply the push-pull oscillation circuit. At the moment of startupVT1Conduction. BecauseC3The charging function of the bidirectional trigger diodeVD5Deadline. whenC3The charging voltage at both ends rises32VAt that timeVD5Triggered and conducted, causingVT2Conduction. inVT2During the conduction periodC3Gradually discharge, and thenVT2Deadline.VTlAfter conduction, in the pulse transformerTUnder the influence ofL1,L2A positive feedback voltage is generated on it, and this voltage is respectively appliedVTlandVT2The base of, toVTlandVT2Alternate conduction and cut-off(namelyVTlWhen conductingVT2Deadline;VT2When conductingVTlDeadline)The push-pull oscillation circuit operates for oscillation. After the push-pull oscillation circuit works, in the pulse transformerTThe secondary windingL6A pulse high voltage is generated at the top, causing an ozone generator sheetVGWork generates ozone.

Meanwhile, light-emitting diodesVD7It also lights up work. Component selection VTl,VT2"Selected2SC2653orBU406Silicon typeNPNHigh reverse voltage transistor. The current amplification factor is requiredβ>100. VDloneVD4,VD6"Selected1 N4007Type rectifier diode;VD5"SelectedDB3Type bidirectional trigger diode. R1oneR6All selectedRJone1/8WType metal film resistor. L0for5mHThe magnetic core inductance coil is availableΦ0.25mmThe enameled wire is wound around the frame210turn;L1Yilu usesΦ0.2mmThe single-core plastic copper wire is wound on the same magnetic ring, among whichL1,L2Detour respectively3"TurnsL3Around the9"Turns. Pulse transformerTAvailable for use14in("Inch")The output transformer of the black-and-white TV set was modified, and a high-voltage package was used during the modificationL6Used on the low-voltage package frameΦ0.45mmIt is wound with enameled wire168"Turns asL4"Φ0.23mmIt is wound with enameled wire4"Turns asL5(Wound on the outer layer). Ozone generator sheetVG"SelectedZtwo10orZone15,Zone20And other models. Production and debugging Ozone-generating tabletsVGAll the electronic components are installed on a self-made printed circuit board and placed in a plastic or wooden box of appropriate size. Make holes on the box surface to fix the light-emitting diodeVD7Connect the ozone generator sheetVGAs long as the components are in good condition and the wiring is correct, it can work normally once powered on.

Generator and discharge tube

The core technology and equipment of the ozone system is the discharge tube in the generator, which directly affects the operational efficiency and reliability of the equipment. The ozone generator adopts a micro-gap dielectric barrier discharge design, which not only significantly enhances the operational efficiency but also increases the reliability of continuous system operation. The technical parameters of the equipment have reached a high level.

Due to the adoption of micro-gap discharge technology, the operating voltage of the system is reduced to6-8 kVIt is far lower than the withstand voltage level of the insulating medium of the glass tube, effectively avoiding the occurrence of medium breakdown short-circuit faults and improving operational reliability.

The modular design method adopted by the discharge unit of the ozone generator makes the installation, inspection and maintenance of the equipment easier. Under the condition of ensuring the quality of the intake gas source, the maintenance-free operation time of the discharge unit of the ozone generator can be as long as5In the year.

High-frequency high-voltage power supply

Compared with the traditional ozone intermediate frequency (<1kHz) The power supply is different. The high-frequency and high-voltage ozone system adopts3-6kHzThe high-frequency power supply technology, combined with the micro-discharge gap design, can effectively enhance the efficiency of ozone generation, reduce the volume and floor space of the generator, and thereby lower the costs of civil engineering design and investment. The inverter power supply system adopts mature high-frequency power supply technology. Long-term on-site operation has proved that it can ensure the stability of the system's long-term operation. The high-frequency output, after passing through the boost system, generates a sinusoidal high voltage, which is connected to the generator via a cable. Under the effect of high-frequency and high voltage, cold-state plasma discharge is produced in the discharge gap to generate ozone.

Cooling systemAlthough the efficiency of modern ozone generators has significantly improved compared to traditional products, there are still some90%The electrical energy on the left and right is not used to generate ozone but is converted into heat. If this part of the heat is not effectively dissipated, the temperature in the discharge gap of the ozone generator will continue to rise and even exceed the designed operating temperature. High temperatures are not conducive to the generation of ozone but are beneficial to its decomposition, resulting in a decrease in ozone production and concentration. We design a single-cycle cooling water unit;When the temperature of the cooling water exceeds the system's designed temperature or the water volume is insufficient, the system will automatically issue an alarm signal.

ParameterFolded ozone concentration

Ozone is a mixed gas, and its concentration is usually expressed in terms of mass ratio and volume ratio. Mass ratio refers to the mass of ozone contained in a unit volume of mixed gas, and it is a commonly used unitmg/L,mg/m3org/m3To indicate. Volume ratio refers to the volume content or percentage content of ozone per unit volume, expressed as a percentage, such as2%,5%,12%Wait. Commonly used in the health industryppmIt represents the ozone concentration, that is, the proportion of ozone in each cubic meter of ozone mixed gas in that volume is one part per million1ppm. Ozone concentration is an important indicator for measuring the technical content and performance of ozone generators. Under the same working conditions, the higher the ozone output concentration, the higher the quality.

The main factors influencing ozone concentration are

1The structure and processing accuracy of the ozone generator;

2Cooling methods and conditions;

3Drive voltage and drive frequency;

4Dielectric materials;

5The oxygen content in the raw material gas and its cleanliness and dryness.

6The efficiency of the generator power supply system(High efficiency and low heat conversion.);

Ozone is a highly oxidizing and unstable gas. The output concentration of ozone is affected by multiple factors, among which the temperature of the cavity is one of the most important ones;Ozone30It will be around 10 degrees1Decay by half within minutes. in 40~50℃ Time attenuation reaches80%. More than60℃Ozone will decompose immediately.