CN2405924Y

CN2405924Y - Ozone generator for high-frequency inverse power supply

Info

Publication number: CN2405924Y
Application number: CN00203251.1U
Authority: CN
Inventors: 林伟胜
Original assignee: ZHONGCAN RESOURCE AND ENVIRONMENT SERVICE CO Ltd XIAMEN
Current assignee: ZHONGCAN RESOURCE AND ENVIRONMENT SERVICE CO Ltd XIAMEN
Priority date: 2000-01-31
Filing date: 2000-01-31
Publication date: 2000-11-15
Anticipated expiration: 2010-01-31

Abstract

It relates to an ozone generator. Including air compressor, condenser, molecular sieve dryer, high-voltage discharge chamber, step-up transformer, operation control device and three-phase 380V power rectification circuit, filter, IGBT inverter, high-frequency inverter control circuit and power supply. The output of the rectification circuit is filtered and connected to the input terminal of the IGBT inverter, the output of the IGBT inverter is connected to the input terminal of the step-up transformer, and the control terminal of the IGBT inverter is connected to the high-frequency inverter control circuit. High power efficiency, low energy consumption and high power factor can increase ozone concentration and ozone production per unit discharge area, reduce the size of high-voltage discharge chambers and transformers, and are safe and reliable.

Description

The high frequency inverter ozonizer

The utility model relates to a kind of ozonizer.

Existing power frequency supply ozonizer mainly is made up of air compressor, condenser, mole sieve drier, electrion chamber, step-up transformer and operation control system.Technological processs such as wherein air compression, condensation, drying be provide to the electrion chamber have certain pressure, low temperature, exsiccant air.And step-up transformer provides the electrion chamber with airborne oxygen molecule (O ₂) synthetic ozone (O ₃) required energy.But have following main drawback: 1) power-efficient is low, energy consumption is high, and power factor is 0.5 only, and electrical network is caused severe contamination; 2) ozone concn of Chan Shenging is low, and unit discharge area ozone output is very low; 3) electrion chamber and step-up transformer are bulky, the structure heaviness; 4) ozone concn and output can't be done linear the adjustment according to user demand; 5) power supply master loop and control loop fail effectively to isolate, and processing safety and reliability are lower; 6) use two-phase 380V power supply, cause power supply grid threephase load imbalance, safe operation constitutes a threat to the electrical network miscellaneous equipment.

The purpose of this utility model is to provide a kind of power-efficient height, energy consumption is lower, power factor Cos reaches 0.9, concentration and unit discharge area ozone output that ozone generates are higher, ozone concn and output can be done linear the adjustment according to user demand, use three-phase 380V power supply, volume is little, the reliable improved high frequency inverter ozonizer of operational safety.

The utility model comprises air compressor, condenser, mole sieve drier, electrion chamber, step-up transformer, operating control device, the pressurized air output tube of air compressor connects the hot junction inlet of condenser, the hot junction outlet of condenser connects the wet air inlet of mole sieve drier, the dry air outlet of mole sieve drier connects the inlet mouth of electrion chamber, the electrode of electrion chamber connects the output terminal of step-up transformer, and operating control device connects each power control terminal.Other is provided with three-phase 380V power rectifier circuit (hereinafter to be referred as rectifying circuit), wave filter, insulated gate bipolar transistor invertor (being called for short the IGBT invertor), high-frequency inversion pilot circuit and direct current regulation circuit.The output terminal of the input termination rectifying circuit of wave filter, the input terminus of the output termination IGBT invertor of wave filter, the input terminus of the output termination step-up transformer of IGBT invertor, the output terminal of the control termination high-frequency inversion pilot circuit of IGBT invertor, the external 220V ac power supply line of the input terminus of direct current regulation circuit, the output terminal of direct current regulation circuit connects rectifying circuit and high-frequency inversion pilot circuit respectively.

Studies show that electrion indoor electric corona power satisfies P=4CdVsf (V ₀-(Cd+Cg) Vs/Cd), wherein P is the arresting element discharge power, and Cd is a dielectric substance electric capacity, and Cg is a discharging gap electric capacity, V ₀For adding driving voltage (peak value), Vs is the corona discharge starting voltage (peak value) between the gap, and f is for adding the driving power frequency.By following formula as can be known, under the prerequisite that does not change the discharge chamber structural parameter,, the discharge power of electrion chamber can be effectively improved, the ozone productive rate of unit discharge area can be effectively improved by improving the frequency of high drive power supply.Because the utility model has improved the design of ozonizer high drive power supply, improved the operating frequency of high-voltage power supply, adopted advanced IGBT invertor, thereby improved the working efficiency of ozonizer, compare with existing power frequency ozonizer, have following advantage: 1) power-efficient height, energy consumption reduces by 30%, and power factor (PF) can be brought up to Cos =0.9; 2) concentration of ozone generation can improve 2 times, and unit discharge area ozone output can improve 5 times; 3) ozone concn and output can be done linear the adjustment according to user demand; 4) use three-phase 380V power supply, the threephase load balance can not exert an influence to external power grid; 5) under identical ozone output, the size of electrion chamber and step-up transformer can reduce significantly, saves material, reduces occupation area of equipment; 6) power supply master loop and control loop are isolated by the photoelectricity matching circuit, and operational safety is reliable.

Fig. 1 is a structured flowchart of the present utility model.

Fig. 2 is high frequency inverter schematic circuit diagram of the present utility model.

Fig. 3 is the cut-away view of IGBT combination drive module EXB841.

As seen from Figure 1, the utility model is made up of air compressor 1, condenser 2, mole sieve drier 3, electrion chamber 4, step-up transformer 5, operating control device 6, three-phase 380V power rectifier circuit 7, wave filter 8, insulated gate bipolar transistor invertor (IGBT invertor) 9, high-frequency inversion pilot circuit 10 and direct current regulation circuit 11.Referring to Fig. 2,3, three-phase 380V 50Hz power supply is through intelligent rectification module ZL ₁Rectification is exported through capacitor C from 3,4 ends ₁, C ₂The wave filter of forming to power filter and master loop over-current protection relay J after isolated input grid bipolar transistor IGBT, the output voltage of rectifying circuit can pass through module ZL ₁0～12V volts DS of 1,2 end is by potentiometer W ₁Make continuous linear regulation.When over current relay J surpassed set(ting)value at main circuit current, normally closed contact disconnected, the power down of J coil, and the alternating current contactor outage, circuit is protected.The high-frequency inversion pilot circuit is by square-wave generator (integrated circuit (IC) ₂) and the IGBT hybrid driving circuit (use module I C ₃) form IC ₂With auxiliary element R ₁, R ₂, C ₃, C ₄Form multivibrator, oscillation frequency f is by R ₁, R ₂, C ₃Determine f=1/ (0.7 (R ₁+ 2R ₂) C ₃) (Hz), by IC ₃The 3rd end output square wave with certain pulse width.IGBT combination drive module I C ₃(EXB841) IC in ₁Be photoelectrical coupler, input control circuit and 3～1 end output circuits and power supply 2～9 ends of 15～14 ends are isolated.When 15～14 ends have positive pulse, IC ₁Conducting, transistor T ₂, T ₃End T ₅Conducting has tripping pulse output between 3～1 terminals.If voltage of supply is+18V between 2～9 ends, the forward bias of No. 1 terminal is+5V that then above-mentioned pulse amplitude is+13V to make the IGBT conducting.When 15～14 ends do not have positive pulse, IC ₁End transistor T ₂, T ₃Conducting, T ₅End T ₆Conducting is between 3～1 terminals-the 5V bias voltage, and IGBT ends.

Integrated circuit (IC) ₃In No. 6 terminals through fast extensive summer diode D ₀(ERA34-10) be connected to the collector electrode C of master loop IGBT.When IGBT is short-circuited (overcurrent) fault, know U by the IGBT output characteristic _CEWill be with I _cSharply increase and increase.Originally be in the D of conducting state ₀Therefore oppositely end integrated circuit (IC) ₃Middle DZ ₁Puncture T ₄Conducting.Diode D ₁Anode potential descends (by R ₇, R ₆Intrinsic standoff ratio is determined), T ₅Output voltage (No. 3 terminals) therefore also be clamped at R ₇, R ₆The branch voltage level on.Along with trigger voltage U _GEReduction, the time that IGBT can bear short circuit increases, thereby allows the over current relay (J) of master loop to have adequate time to remove to carry out turn-off protection.Meanwhile, the photoelectrical coupler IC that No. 5 terminal connect ₄Action, the output terminal of coupling mechanism is connected to multivibrator IC ₂No. 4 terminals, make it and the power supply ground short circuit, thereby block triggering signal, protection IGBT does not continue conducting.The output termination step-up transformer B of IGBT ₂Elementary, B ₂The secondary high voltage electrode G that connects the electrion chamber.Resistance R _GBe the current limliting protective resistance.

Direct current regulation circuit adopts rectifier bridge ZL ₂, ZL ₃With circuit of three-terminal voltage-stabilizing integrated IC ₅, IC ₆, output 12V, 18V voltage.S among Fig. 2 ₁, S ₂Be respectively start button and stop botton, JL is an AC buzzer.

Claims

1. High-frequency inverter power supply ozone generator, equipped with air compressor, condenser, molecular sieve dryer, high-voltage discharge chamber, step-up transformer, operation control device, the compressed air output pipe of the air compressor is connected to the hot end of the condenser The inlet, the hot end outlet of the condenser are connected to the wet air inlet of the molecular sieve dryer, the dry air outlet of the molecular sieve dryer is connected to the air inlet of the high-voltage discharge chamber, the electrodes of the high-voltage discharge chamber are connected to the output end of the step-up transformer, and the operation control device is connected to the Each power supply control terminal is characterized in that it is also equipped with a three-phase 380V power supply rectification circuit, a filter, an insulated gate bipolar transistor inverter, a high-frequency inverter control circuit and a DC voltage stabilization circuit, and the input terminal of the filter is connected to the rectification circuit The output terminal of the filter is connected to the input terminal of the IGBT inverter, the output terminal of the IGBT inverter is connected to the input terminal of the step-up transformer, and the IGBT inverter The control end of the transformer is connected to the output end of the high-frequency inverter control circuit, and the output end of the DC voltage stabilizing circuit is respectively connected to the three-phase 380V power supply rectifier circuit and the high-frequency inverter control circuit.

2. The high-frequency inverter power supply ozone generator as claimed in claim 1 is characterized in that said high-frequency inverter control circuit is made up of a rectangular wave generator and an insulated gate bipolar transistor inverter hybrid drive circuit. The output of the wave generator is connected to the 14th and 15th terminals of the IGBT hybrid drive module EXB841, and the control signal is output from the 1st and 3rd terminals to the gate of the insulated gate bipolar transistor.