Ozone generator and circuit

Abstract

The utility model provides an ozone generator and a circuit in order to solve the problems of lack of an accurate control mechanism and poor filtering effect in the prior art. The utility model relates to the technical field of ozone generation equipment. The ozone generator circuit comprises the following components: a step-down transformer DT, a rectifying circuit, a filter circuit, an inverter circuit, a controller and a step-up transformer UT. According to the ozone generator and the circuit disclosed by the utility model, parameters such as frequency conversion frequency of the inverter circuit can be accurately adjusted through the controller, and flexible adjustment can be realized according to different application scenes and actual requirements. According to the ozone generator and the circuit disclosed by the utility model, the optimized filter circuit is adopted, so that high-frequency clutters can be effectively filtered, the quality of output direct current is greatly improved, stable and high-quality input is provided for an inverter circuit, the waveform of inverted alternating current is more ideal, the performance and the stability of the whole circuit are improved, and the service life of the whole circuit is prolonged. Efficient and stable work of the ozone generation pipe is ensured, and ozone generation efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ozone generation equipment technical field especially, it relates to a kind of ozone generator and circuit. BACKGROUND

[0002] Ozone is a kind of gas with strong oxidizing property, it is light blue at normal temperature and pressure, with special pungent smell. It has very strong sterilization, disinfection, deodorization, decolorization etc. ability, and it will quickly decompose into oxygen after disinfection and sterilization, without secondary pollution, so it has extensive application demand in many fields.

[0003] The existing ozone generator has some limitations in technology. On the one hand, some ozone generators lack precise control mechanism, they can only provide fixed working mode, and cannot meet different application scenarios and actual needs, such as frequency conversion frequency of inverter circuit, which greatly limits its adaptability and processing effect under different working conditions. On the other hand, the filter circuit is not optimized, and cannot effectively filter out high-frequency noise, which will make the quality of output DC power poor, and further affect the performance of subsequent inverter circuit, resulting in unsatisfactory AC waveform after inverter, UTILITY MODEL CONTENT

[0004] The utility model provides a kind of ozone generator and circuit to solve the problem of lack of precise control mechanism and poor filtering effect in prior art.

[0005] The technical scheme adopted by the utility model is:

[0006] A kind of ozone generator circuit, comprising:

[0007] The step-down transformer DT input end is connected with alternating current power supply;The alternating current power supply is the power supply for the step-down transformer DT;

[0008] Rectifier circuit, the rectifier circuit input end is connected with step-down transformer DT output end;The rectifier circuit is used to convert AC into DC;

[0009] Filter circuit, the filter circuit input end is connected with the rectifier circuit;The filter circuit is used to filter out high-frequency noise;

[0010] Inverter circuit, the inverter circuit input end is connected with the filter circuit;The inverter circuit is used to convert DC into AC;

[0011] Controller, the controller is connected with the inverter circuit;The controller is used to control the frequency conversion frequency of the inverter circuit;

[0012] A step-up transformer UT, an input end of which is connected with the output end of the inverter circuit, and an output end of which is connected with the ozone generating tube.

[0013] Further, the rectifier circuit is a single-direction full-wave rectifier circuit.

[0014] Further, the single-direction full-wave rectifier circuit comprises:

[0015] a diode D11;

[0016] a diode D12, a cathode of which is connected with the cathode of the diode D11, and a connection point between the cathode of the diode D12 and the cathode of the diode D11 is connected with one input end of the filter circuit;

[0017] a diode D13, an anode of which is connected with the anode of the diode D12, and a connection point between the cathode of the diode D13 and the anode of the diode D12 is connected with one output end of the step-down transformer DT;

[0018] a diode D14, an anode of which is connected with the anode of the diode D13, and a connection point between the anode of the diode D14 and the anode of the diode D13 is connected with another input end of the filter circuit; a cathode of the diode D14 is connected with the anode of the diode D11, and a connection point between the cathode of the diode D14 and the anode of the diode D11 is connected with another output end of the step-down transformer DT.

[0019] Further, the filter circuit is a complex filter circuit.

[0020] Further, the complex filter circuit comprises:

[0021] an inductor L, one end of which is connected with the positive pole of the rectifier circuit;

[0022] a capacitor C, one end of which is connected with the other end of the inductor L, and one end of which is connected with the negative pole of the rectifier circuit;

[0023] a resistor R, one end of which is connected with the connection point between the inductor L and the capacitor C, and the other end of which is connected with the negative pole of the rectifier circuit.

[0024] Further, the inverter circuit comprises:

[0025] an IGBT 1, a gate of which is connected with the controller;

[0026] IGBT2, the emitter electrode of the IGBT2 is connected with the emitter electrode of the IGBT1, and a connection point between the collector electrode of the IGBT2 and the emitter electrode of the IGBT1 is connected with one end of the step-up transformer UT; the gate electrode of the IGBT2 is connected with the controller;

[0027] IGBT3, the emitter electrode of the IGBT3 is connected with the emitter electrode of the IGBT2, and a connection point between the emitter electrode of the IGBT3 and the emitter electrode of the IGBT2 is connected with the negative electrode of the filter circuit; the gate electrode of the IGBT3 is connected with the controller;

[0028] IGBT4, the emitter electrode of the IGBT4 is connected with the collector electrode of the IGBT3, and a connection point between the emitter electrode of the IGBT4 and the collector electrode of the IGBT3 is connected with the other end of the step-up transformer UT; the collector electrode of the IGBT4 is connected with the collector electrode of the IGBT1, a connection point between the collector electrode of the IGBT4 and the collector electrode of the IGBT1 is connected with the positive electrode of the filter circuit; the gate electrode of the IGBT4 is connected with the controller.

[0029] Further, the IGBT1, the IGBT2, the IGBT3 and the IGBT4 are respectively connected with diode D21, diode D22, diode D23 and diode D24 in parallel.

[0030] Based on the same inventive concept, the utility model also provides an ozone generator, including preceding and following ozone generator circuit.

[0031] The utility model discloses the beneficial effects are:

[0032] The utility model discloses an ozone generator and circuit can accurately adjust the frequency conversion frequency parameter of inverter circuit through controller, can flexibly adjust according to different application scene and actual demand. The utility model discloses an ozone generator and circuit adopt optimized filter circuit, can effectively filter high frequency noise, make output direct current quality greatly improve, provide stable high -quality input for inverter circuit, further guarantee the alternating current waveform after inverting is more ideal, has promoted the performance and stability of whole circuit, has guaranteed that ozone generator tube works efficiently and stably, has improved ozone production efficiency and quality. ACCURACY

[0033] In order to more clearly illustrate the technical scheme in the embodiment of the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0034] Figure 1The ozone generator circuit diagram is shown in the following figure;

[0035] Figure 2 The ozone generator circuit diagram is shown in the following figure. DETAILED DESCRIPTION

[0036] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0037] The following disclosure provides many different embodiments or examples for implementing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the utility model.

[0038] The embodiments of the utility model are described in detail below in combination with the drawings.

[0039] The ozone generator circuit disclosed in the embodiment comprises the following components: a step-down transformer DT, a rectifier circuit, a filter circuit, an inverter circuit, a controller and a step-up transformer UT. In addition to the complete circuit structure, the embodiment also comprises external components: an alternating current power supply and an ozone generating tube. As shown in the accompanying Figure 1 The ozone generator circuit diagram is shown in the following figure; the connection relationship between each component is introduced as follows:

[0040] The step-down transformer DT is connected with the alternating current power supply at the input end; the alternating current power supply supplies power to the step-down transformer DT;

[0041] The rectifier circuit is connected with the step-down transformer DT at the input end; the rectifier circuit is used to convert alternating current into direct current;

[0042] The filter circuit is connected with the rectifier circuit at the input end; the filter circuit is used to filter out high-frequency noise;

[0043] The inverter circuit is connected with the filter circuit at the input end; the inverter circuit is used to convert direct current into alternating current;

[0044] The controller is connected with the inverter circuit; the controller is used to control the frequency conversion frequency of the inverter circuit;

[0045] A step-up transformer UT, an input end of which is connected with the output end of the inverter circuit, and an output end of which is connected with the ozone generator tube.

[0046] The above components and connection relationship are described in detail as follows:

[0047] AC power supply

[0048] Function and characteristics: the AC power supply is the energy source of the entire ozone generator circuit. In this embodiment, a 220V, 50Hz AC power supply is selected. It provides stable AC power input for the subsequent circuit.

[0049] Step-down transformer DT

[0050] Parameter selection and design: a step-down transformer with a transformation ratio of 220:36 is selected.

[0051] Rectifier circuit

[0052] Unidirectional full-wave rectifier circuit structure and component parameters:

[0053] Diodes D11, D12, D13, and D14: diodes with a withstand voltage of 100V or more and a current capacity of 3A or more are selected.

[0054] Connection mode: the cathode of diode D12 is connected with the cathode of diode D11, and the connection point is connected with one input end of the filter circuit; the cathode of diode D13 is connected with the anode of diode D12, and the connection point is connected with one output end of the step-down transformer DT; the anode of diode D14 is connected with the anode of diode D13, and the connection point is connected with the other input end of the filter circuit; the cathode of diode D14 is connected with the anode of diode D11, and the connection point is connected with the other output end of the step-down transformer DT. As shown in the accompanying drawings. Figure 2

[0055] Working principle and rectification process:

[0056] During the positive half cycle of the AC voltage, assuming that one output end of the step-down transformer DT is positive and the other output end is negative. At this time, the current flows out from the positive end, passes through diode D11, the filter circuit, diode D13, and returns to the negative end of the step-down transformer DT, forming a loop, and diodes D12 and D14 are in reverse blocking state.

[0057] During the negative half cycle of the AC voltage, the output end of the step-down transformer DT reverses polarity, at this time the current flows out from the negative end, passes through diode D12, the filter circuit, diode D14, and returns to the positive end of the step-down transformer DT, forming another loop, and diodes D11 and D13 are in reverse blocking state.

[0058] ​Through such alternate conduction, a direct current with unchanging direction but pulsating size is obtained at the input end of the filter circuit, realizing the function of converting alternating current into direct current. Compared with half-wave rectification, full-wave rectification can make more sufficient use of the energy of alternating current, improve rectification efficiency, and make the output direct current more stable and continuous.

[0059] Filter circuit

[0060] The structure and element parameters of the compound filter circuit are as follows:

[0061] Inductor L: The selection of inductance value is determined according to the working frequency and current size of the circuit, and generally, an inductor with inductance of several hundred microhenries to several millihenries is selected. For example, for a circuit with a working frequency of 50 Hz, an inductor with inductance of about 1 mH can be selected, and its rated current should be greater than the maximum working current of the circuit.

[0062] Capacitor C: The selection of capacitance value should consider the filtering effect and the response speed of the circuit, and generally, an electrolytic capacitor with capacitance of several hundred microfarads to several thousand microfarads is selected. For example, an electrolytic capacitor with capacitance of 470 μF and voltage resistance greater than the output voltage of the rectifier circuit can be selected to ensure that the capacitor will not be broken down during operation.

[0063] Resistance R: The resistance value is generally selected to be several tens of ohms to several hundred ohms, and the power is determined according to the current in the circuit and the voltage drop across the resistor, to ensure that the resistor will not overheat and burn out during operation. For example, if the voltage drop across the resistor is 5 V and the current is 0.1 A, a resistor with power of 0.5 W or more and resistance of 50 Ω can be selected.

[0064] Connection method: One end of the inductor L is connected to the positive electrode of the rectifier circuit; one end of the capacitor C is connected to the other end of the inductor L, and the other end of the capacitor C is connected to the negative electrode of the rectifier circuit; one end of the resistor R is connected to the connection point between the inductor L and the capacitor C, and the other end of the resistor R is connected to the negative electrode of the rectifier circuit. As shown in the accompanying Figure 2

[0065] Working principle and filtering effect:

[0066] The inductor L has the characteristic of hindering current change, and when the pulsating direct current output by the rectifier circuit passes through the inductor L, the inductor will prevent rapid changes in current, reducing the fluctuation of current. The capacitor C has the ability to store electric charge, and when the voltage rises, the capacitor charges and stores the excess electrical energy; when the voltage decreases, the capacitor discharges and supplements the current in the circuit, thereby smoothing the voltage waveform. The resistor R plays a certain role in current limiting and voltage division, which helps to stabilize the operation of the filter circuit and prevent excessive current impact on the inductor and capacitor during charging and discharging.

[0067] ​The output DC current becomes more smooth through the filtering circuit, and the high-frequency noise is effectively filtered out, providing a stable and pure DC power source for the subsequent inverter circuit, improving the performance and reliability of the entire circuit.

[0068] Inverter circuit

[0069] The selection and parameters of IGBT and its parallel diode are as follows:

[0070] IGBT1, IGBT2, IGBT3, IGBT4: select appropriate IGBT model according to the requirements of circuit operating voltage, current and switching frequency, etc. For example, if the operating voltage of the inverter circuit is 300V, the maximum operating current is 10A, and the switching frequency is 20kHz, an IGBT with a withstand voltage of 600V or more, a current capacity of 15A or more, and a switching frequency that meets the requirements can be selected. For example, as shown in the attached Figure 2

[0071] Diodes D21, D22, D23, D24: parallel to IGBT1, IGBT2, IGBT3, IGBT4, respectively, select a fast recovery diode that matches the IGBT, with a withstand voltage and current capacity comparable to or slightly higher than the IGBT, to ensure that it can conduct quickly when the IGBT is off, providing a continuous current path for the inductor current. In this embodiment, a fast recovery diode with a withstand voltage of 600V and a current capacity of 15A or more is selected.

[0072] Working principle and control mode of inverter circuit:

[0073] Working principle: The control signals output by the controller are connected to the gates of IGBT1, IGBT2, IGBT3, and IGBT4, respectively, and the conversion of DC to AC is realized by controlling the conduction and turn-off of these IGBTs. When IGBT1 and IGBT4 are turned on and IGBT2 and IGBT3 are turned off, the current flows from the positive electrode of the filter circuit through IGBT1, one end of the boost transformer UT, the other end of the boost transformer UT, IGBT4 to the negative electrode of the filter circuit, forming a directional current at the input end of the boost transformer UT; when IGBT2 and IGBT3 are turned on and IGBT1 and IGBT4 are turned off, the current direction is reversed, thereby forming an alternating current at the input end of the boost transformer UT.

[0074] ​Control mode: The controller controls the on and off time of the IGBT by outputting pulse signals of different frequencies and duty cycles, thereby controlling the frequency and amplitude of the AC output by the inverter circuit. For example, to output AC of 10 kHz, the controller alternately outputs high and low level signals at a frequency of 10 kHz to control the on and off of the IGBT. By adjusting the duty cycle of the pulse signal, the amplitude of the output AC can be changed, thereby adjusting the working voltage of the ozone generator tube and controlling the amount of ozone generated.

[0075] Controller

[0076] Function and characteristics: The controller is the core control component of the entire ozone generator circuit, and in this embodiment, a single-chip microcomputer controller is selected. As a controller, it has a high-precision clock source and rich input and output interfaces, and can accurately generate the pulse signals required to control the inverter circuit.

[0077] Control strategy and parameter setting:

[0078] Control strategy: According to the working requirements and performance indicators of the ozone generator, the single-chip microcomputer generates pulse signals. Using the sine wave pulse width modulation (SPWM) technology, a series of equal-amplitude and unequal-width pulse signals are generated by sampling and modulating the sine wave. These pulse signals, after being amplified by the drive circuit, control the on and off of the IGBT, so that the AC output by the inverter circuit is close to a sine wave.

[0079] Parameter setting: The controller can set parameters such as the output frequency and amplitude of the inverter circuit. For example, in air purification applications, lower concentrations of ozone may be required, and the controller can set lower output frequencies and amplitudes; while in water treatment and other applications that require higher concentrations of ozone, higher output frequencies and amplitudes can be set. In addition, the controller can also set some protection parameters, such as overcurrent protection and overvoltage protection, to take protective measures in time when the circuit appears abnormal, ensuring the safety of the circuit and equipment.

[0080] Boost transformer UT

[0081] Parameter design and selection:

[0082] According to the working voltage required by the ozone generator tube and the output voltage of the inverter circuit, the transformation ratio of the boost transformer is determined. For example, if the inverter circuit outputs a voltage of 300V, and the ozone generator tube requires a working voltage of 3000V, the transformation ratio of the boost transformer is about 1:10. The power of the transformer should be determined according to the power demand and efficiency of the ozone generator, to ensure that it can provide enough energy to the ozone generator tube, while considering a certain margin to cope with possible power fluctuations and losses.

[0083] The ozone generator disclosed in this embodiment includes the above-mentioned ozone generator circuit.

[0084] The ozone generator and circuit disclosed in this embodiment have the following advantages:

[0085] High energy conversion efficiency:

[0086] After the AC power is stepped down by the step-down transformer DT, it is efficiently converted into DC power by the rectifier circuit. Compared with half-wave rectification, full-wave rectification can make more full use of the energy of AC power, improve the energy conversion efficiency, and reduce energy loss.

[0087] The filter circuit uses a complex filter structure, and the inductor L and the capacitor C work together to effectively filter out high-frequency noise, making the output DC power more smooth and stable, providing high-quality DC power for the subsequent inverter circuit, and further ensuring the efficient operation of the entire circuit, thereby improving the overall energy utilization efficiency of the ozone generator.

[0088] The inverter circuit converts the DC power into AC power suitable for the operation of the ozone generation tube under the precise control of the controller, and by adjusting parameters such as frequency, it can optimize energy output, so that the ozone generation tube operates in the best working state, maximizes the conversion of electrical energy into ozone energy, and improves the ozone generation efficiency.

[0089] Stable working performance:

[0090] The step-down transformer DT plays a role in voltage adaptation, allowing subsequent circuit components to operate within a suitable voltage range, reducing the risk of component damage due to overvoltage, and improving the stability and reliability of the circuit.

[0091] The presence of the filter circuit reduces the voltage fluctuation of the DC power supply, providing stable input for the inverter circuit, and further ensuring the stability of the inverter circuit output AC power, so that the voltage across the ozone generation tube can be stabilized within a suitable range, ensuring the stability of ozone production, avoiding problems such as unstable ozone concentration caused by voltage fluctuations, and enabling the ozone generator to meet the needs of various application scenarios stably.

[0092] The precise control of the controller over the inverter circuit not only allows for precise adjustment of output frequency and other parameters, but also enables the setting of various protection functions such as overcurrent protection and overvoltage protection. When abnormal conditions occur in the circuit, timely measures can be taken to protect circuit components from damage, further enhancing the stability and reliability of the circuit and prolonging the service life of the ozone generator.

[0093] Wide applicability:

[0094] Since the ozone generator circuit can flexibly adjust output parameters such as output frequency, amplitude, etc. through the controller, the ozone generation amount and concentration can be adjusted according to different application scenarios and requirements. For example, in the field of air purification, only a low concentration of ozone may be needed for general indoor air purification; while in places such as hospitals where air quality requirements are higher, the ozone concentration may need to be appropriately increased. In water treatment, for different water quality and treatment capacity, the ozone dosage can also be optimized by adjusting the circuit parameters to meet the requirements of various water treatment processes, such as drinking water disinfection, industrial wastewater treatment, etc., with strong versatility and adaptability.

Claims

1. An ozone generator circuit, characterized in that, include: A step-down transformer DT, the input terminal of which is connected to an AC power source; the AC power source supplies power to the step-down transformer DT. A rectifier circuit, the input terminal of which is connected to the output terminal of the step-down transformer DT; the rectifier circuit is used to convert alternating current into direct current; A filter circuit, the input terminal of which is connected to the rectifier circuit; the filter circuit is used to filter out high-frequency noise. An inverter circuit, the input terminal of which is connected to the filter circuit; the inverter circuit is used to convert direct current into alternating current. A controller is connected to the inverter circuit; the controller is used to control the frequency conversion frequency of the inverter circuit. A step-up transformer UT, wherein the input terminal of the step-up transformer UT is connected to the output terminal of the inverter circuit, and the output terminal of the step-up transformer UT is connected to the ozone generating tube; The filtering circuit is a compound filtering circuit.

2. The ozone generator circuit according to claim 1, characterized in that, The rectifier circuit is a unidirectional full-wave rectifier circuit.

3. The ozone generator circuit according to claim 2, characterized in that, The unidirectional full-wave rectifier circuit includes: Diode D11; Diode D12, the cathode of diode D12 is connected to the cathode of diode D11, and the connection point between the cathodes of diode D12 and diode D11 is connected to one input terminal of the filter circuit; Diode D13, wherein the cathode of diode D13 is connected to the anode of diode D12, and the connection point between the cathode of diode D13 and the anode of diode D12 is connected to one output terminal of the step-down transformer DT; Diode D14, the anode of diode D14 is connected to the anode of diode D13, and the connection point between the anodes of diode D14 and D13 is connected to another input terminal of the filter circuit; the cathode of diode D14 is connected to the anode of diode D11, and the connection point between the cathode of diode D14 and D11 is connected to another output terminal of the step-down transformer DT.

4. The ozone generator circuit according to claim 3, characterized in that, The complex filter circuit includes: An inductor L, one end of which is connected to the positive terminal of the rectifier circuit; A capacitor C, one end of which is connected to the other end of the inductor L, and another end of the capacitor C is connected to the negative terminal of the rectifier circuit; A resistor R is connected at one end to the connection point between the inductor L and the capacitor C, and at the other end to the negative terminal of the rectifier circuit.

5. The ozone generator circuit according to any one of claims 1-4, characterized in that, The inverter circuit includes: IGBT1; the gate of IGBT1 is connected to the controller; IGBT2, wherein the collector of IGBT2 is connected to the emitter of IGBT1, and the connection point between the collector of IGBT2 and the emitter of IGBT1 is connected to one end of the boost transformer UT; the gate of IGBT2 is connected to the controller; IGBT3, wherein the emitter of IGBT3 is connected to the emitter of IGBT2, and the connection point between the emitters of IGBT3 and IGBT2 is connected to the negative terminal of the filter circuit; the gate of IGBT3 is connected to the controller; IGBT4, wherein the emitter of IGBT4 is connected to the collector of IGBT3, and the connection point between the emitter of IGBT4 and the collector of IGBT3 is connected to the other end of the step-up transformer UT; the collector of IGBT4 is connected to the collector of IGBT1, and the connection point between the collector of IGBT4 and the collector of IGBT1 is connected to the positive terminal of the filter circuit; the gate of IGBT4 is connected to the controller.

6. The ozone generator circuit according to claim 5, characterized in that, IGBT1, IGBT2, IGBT3, and IGBT4 are respectively connected in parallel with diodes D21, D22, D23, and D24.

7. An ozone generator, characterized in that, Includes the ozone generator circuit as described in any one of claims 1-6.

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