An ozone generator circuit structure

Abstract

This invention discloses an ozone generator circuit structure. The power supply passes through the winding of filter L1, forming a π-type filter with capacitors C1 and C2 to filter out differential-mode interference and generate a relatively pure AC voltage. Capacitors C3 and C4 are connected in parallel with the main voltage to form a common-mode filter network, effectively suppressing electromagnetic interference (EMI). The filtered AC voltage is rectified by a full-bridge rectifier D1-D4, converting the AC power into pulsating DC power. The pulsating DC power is filtered by capacitors C5 and C6 (105n) to generate smooth DC power, providing a stable power supply for subsequent circuits. This circuit, through reasonable filtering, rectification, voltage regulation, driving, and excitation design, achieves efficient conversion from AC power to high-frequency, high-voltage pulses. It can stably drive the ozone tube to generate ozone gas, featuring high efficiency, low interference, a stable driving signal, and a reliable protection mechanism, making it suitable for applications requiring high-efficiency ozone generation.

Description

Technical Field

[0001] This utility model relates to the field of ozone generator technology, and in particular to an ozone generator circuit structure. Background Technology

[0002] Substantial technical problems have arisen in the ozone production process. The existing ozone generator circuitry cannot stably drive the ozone tube to produce ozone gas, resulting in low efficiency, significant interference, and unstable signal drive. During the power conversion, certain common-mode and differential-mode interference waveforms are transmitted into the power grid, affecting the normal operation of the fundamental sine wave. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a circuit structure for an ozone generator.

[0004] This utility model is achieved through the following technical solution:

[0005] An ozone generator circuit structure includes two circuits. One circuit connects to an AC220V / 50Hz power supply, with a 3A fuse connected to the AC220V / 50Hz power supply. The output voltage of the AC220V / 50Hz power supply is connected to the windings of pins 1 and 2 and pins 3 and 4 of filter L1, respectively. The output is then connected to two X capacitors C1 and C2 to form a π-type filter, which generates a pure AC voltage after differential mode filtering. The output AC voltage is connected in parallel to two Y capacitors C3 and C4 to form a common mode filter network. The circuit is then connected to pins 1 and 3 of a full-bridge circuit D1-D4 for rectification. The pulsating DC voltage output from pin 2 of the full-bridge circuit D1-D4 is sequentially connected to two capacitors C5 and C6 for filtering to generate a smooth DC voltage. Pin 2 of the full-bridge circuit D1-D4 is also connected to the drains of NMOS transistors Q1 and Q2.

[0006] Another path uses a resistor R1 and capacitor C7 connected in parallel to form a resistor-capacitor (RC) step-down network. The step-down output is connected to a full-bridge rectifier (D5-D8). The full-bridge D5-D8 rectifies and outputs a pulsating DC voltage. This pulsating DC voltage is connected to resistor R14, which is connected to the negative terminal of Zener diode D18. The voltage is then regulated and filtered by connecting to the positive terminal of filter capacitor C14. Both the positive terminal of Zener diode D18 and the negative terminal of filter capacitor C14 are connected to the negative terminal of the AC 220V / 50Hz power supply. The output pulsating DC voltage is powered by pins 4 and 8 of the excitation chip IC1. When the excitation chip IC1 is powered, the voltage is supplied through resistors and capacitors R2, R3, R4, C8, and C9 respectively. Pins 2, 6, 7, 8, and 1 of the excitation chip IC1 form an astable square wave generator. Pin 3 of the excitation chip IC1 is connected to resistor R11 and capacitor C10 in sequence to form an integrating circuit. The integrating circuit is connected to pin 1 of transformer B2 for shaping, generating an excitation signal with positive on top and negative on the bottom on the two secondary windings of pins 3, 4, 5, and 6 of transformer B2. The excitation signal is connected to resistors R9 and R10 and diode D10 to drive the gates of NMOS transistors Q1 and Q2 respectively. The generated pulse square wave voltage and the smooth DC current generated by capacitors C5 and C6 are respectively connected to the primary coil of high-frequency transformer B1.

[0007] The NMOS transistors Q1 and Q2 are IRF-740 transistors.

[0008] The excitation chip IC1 is model NE555.

[0009] The capacitors C5 and C6 are energy storage capacitors of 400V / 105n.

[0010] The generated pulsed square wave voltage is connected to the primary starting coil of the high-frequency transformer B1, and the smooth DC current generated by capacitors C5 and C6 is connected to the primary ending coil of the high-frequency transformer B1, that is, the secondary coil of the high-frequency transformer B1 obtains a sinusoidal high-frequency high voltage.

[0011] The secondary winding of the high-frequency transformer B1 is connected to the anode of the ozone tube, and the secondary winding of the high-frequency transformer B1 is connected to the cathode of the ozone tube.

[0012] The working principle of this utility model is as follows:

[0013] Overcurrent protection and filtering:

[0014] Overcurrent protection: Overcurrent protection is provided by a 3A fuse. When the circuit current exceeds 3A, the fuse blows, cutting off the power supply and protecting the circuit from damage.

[0015] Differential-mode filtering: The AC220V power supply passes through the winding of filter L1, which, together with capacitors C1 and C2, forms a π-type filter to filter out differential-mode interference in the power supply and generate a relatively pure AC voltage.

[0016] Common-mode filtering: Capacitors C3 and C4 are connected in parallel with the main voltage to form a common-mode filter network, which effectively suppresses electromagnetic interference (EMI) and controls the dB of electromagnetic compatibility (EMC).

[0017] Rectification and filtering:

[0018] Rectification: The filtered AC voltage is rectified by the full-bridge rectifier D1-D4 to convert the AC power into pulsating DC power.

[0019] Filtering: The pulsating DC current is filtered by capacitors C5 and C6 (105μF) to generate smooth DC current, providing a stable power supply for subsequent circuits.

[0020] Drives and incentives:

[0021] NMOS drive: The primary coil of the high-frequency transformer B1 is supplied with a pulsed square wave voltage through NMOS transistors Q1 and Q2 (IRF-740). The drains (D) of Q1 and Q2 are directly powered, and the gates (G) are driven through resistors R9 and R10 and diode D10.

[0022] RC step-down and regulation: Another path uses an RC step-down network (R1 and C7) to step down the voltage, and then rectifies it through a full-bridge rectifier D5-D8 to output a pulsating DC voltage. This voltage is regulated and filtered by Zener diode D18 and filter capacitor C14 to provide a stable DC power supply for the excitation chip IC1 (NE555).

[0023] Astable square wave generator: The NE555 chip, through external resistors and capacitors (R2, R3, R4, C8, C9), forms an astable square wave generator to produce a square wave signal. The square wave signal is shaped by an integrator circuit composed of resistor R11 and capacitor C10, and then drives transformer B2.

[0024] Excitation signal: Drives the secondary winding of transformer B2 to generate an excitation signal, which drives the gates of Q1 and Q2 through resistors R9 and R10 and diode D10 respectively, causing Q1 and Q2 to alternately turn on and off, generating a pulsed square wave voltage.

[0025] High-frequency transformers and ozone generation:

[0026] High-frequency transformer: The pulsed square wave voltage passes through the primary coil of the high-frequency transformer B1, and the secondary coil generates a high-frequency high-voltage pulse.

[0027] Ozone generation: High-frequency, high-voltage pulses pass through the anode and cathode of the ozone tube, generating a corona effect along the edge, thereby producing ozone gas.

[0028] The advantages of this utility model are:

[0029] 1. High efficiency and low interference:

[0030] Filtering Design: This invention effectively filters out differential-mode and common-mode interference in the power supply through a π-type filter and a common-mode filter network, thereby reducing electromagnetic interference (EMI) and improving power quality.

[0031] High-frequency conversion: This invention uses a high-frequency transformer to improve conversion efficiency, reduce transformer size and weight, and reduce power consumption.

[0032] 2. Stable drivers and incentives:

[0033] RC step-down and voltage regulation: A stable power supply is provided to the excitation chip through the RC step-down network and the Zener diode D18, ensuring the reliability of the circuit.

[0034] Astable square wave generator: The astable square wave generator, constructed from the NE555 chip, can stably generate square wave signals, providing a stable excitation signal for high-frequency transformers.

[0035] 3. Reliable protection mechanism:

[0036] Overcurrent protection: Overcurrent protection is provided by a 3A fuse to prevent circuit overload damage.

[0037] Voltage regulation and filtering: Through Zener diodes and filter capacitors, the power supply voltage is stabilized and the circuit's anti-interference capability is improved.

[0038] 4. Highly efficient ozone generation:

[0039] High-frequency high-voltage pulse: The high-frequency high-voltage pulse generated by the high-frequency transformer can efficiently drive the ozone tube to produce a high concentration of ozone gas.

[0040] Edge corona effect: High-frequency high-voltage pulses generate edge corona between the anode and cathode of the ozone tube, improving ozone generation efficiency.

[0041] 5. Through reasonable filtering, rectification, voltage regulation, driving and excitation design, the circuit of this utility model realizes the efficient conversion from AC to high frequency high voltage pulse, which can stably drive the ozone tube to generate ozone gas. It has high efficiency, low interference, stable driving signal and reliable protection mechanism, and is suitable for occasions that require efficient ozone generation. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the circuit structure of this utility model. Detailed Implementation

[0043] like Figure 1As shown, an ozone generator circuit structure is divided into two paths. One path is connected to a 220V / 50Hz AC power supply and uses a 3A fuse for overcurrent protection. The output voltage is then connected to the windings of pins 1 and 2, and pins 3 and 4 of filter L1, respectively. The output is connected to two X capacitors C1 and C2 to form a π-type filter, which performs differential-mode filtering to generate a relatively pure AC voltage. At this point, two Y capacitors C3 and C4 are connected in parallel with the main voltage to form a common-mode filter network, which can effectively control the dB EMC. After rectification by pins 1 and 3 of the full-bridge rectifier connected to D1-D4, the full-bridge rectifier outputs a pulsating DC voltage at pins 2 and 4. The pulsating DC voltage is filtered by two 105n capacitors (C5 and C6) to produce a smooth DC voltage. This smooth DC voltage is then connected to NMOS transistors Q1 and Q2, directly powering the drain (D) of the high-power driver IRF-740. Another path involves a 1MΩ resistor (R1) and a 470nΩ capacitor (C7) connected in parallel to form a RC step-down network. This step-down voltage is then rectified by a full-bridge rectifier (D5-D8) to output a pulsating DC voltage. This pulsating DC voltage is connected to resistor R14, then to the negative terminal of Zener diode D18. The voltage is then regulated by connecting to the positive terminal of filter capacitor C14. Both the positive terminal of Zener diode D18 and the negative terminal of the filter capacitor are connected to the negative terminal of the power supply. The resulting stable, smooth DC voltage is then connected to the excitation chip IC1. The NE555 timer is powered by pins 4 and 8. When the excitation chip IC1 is powered on, it forms an astable square wave generator by connecting several external resistors and capacitors (R2, R3, R4, C8, C9) to pins 2, 6, 7, 8, and 1 of IC1, respectively. Pin 3 of the excitation chip IC1 is connected to an integrating circuit consisting of resistor R11 (100Ω) and capacitor C10 (1µF), which is then connected to pin 1 of transformer B2 for shaping. This generates an excitation signal with a positive upper winding and a negative lower winding on the two secondary windings of the transformer B2 (pins 3, 4, 5, and 6). This excitation signal drives Q1 through resistors R9 and R10 and diode D10 (4148). The gates (G) of the two NMOS transistors Q2 cause the IRF-740 driving transistors Q1 and Q2 to work alternately, generating a pulsed square wave. This pulsed square wave is connected to the primary winding of the high-frequency transformer B1 to start power supply. The two main filter energy storage capacitors C5 and C6 (400V / 105n) are connected to the end coil of the primary winding of the high-frequency transformer B1. This gives the secondary winding of the high-frequency transformer B1 a sinusoidal high-frequency high voltage. The end of the secondary winding of the high-frequency high-voltage transformer B1 is connected to the anode of the ozone tube, and the beginning of the secondary winding of the high-frequency transformer B1 is connected to the cathode of the ozone tube. The sinusoidal high-frequency high voltage corona discharges along the cathode and anode of the ozone tube, generating ozone gas.

[0044] This invention utilizes electromagnetic compatibility (EMC) theory. The driving power supply employs frequency conversion technology to convert the 50Hz / AC220V sine wave from the power grid into a high-frequency square wave pulse of approximately 20kHz, which is applied to the primary coil of a high-frequency transformer. Simultaneously, a high-voltage sine wave pulse of approximately AC5000V is generated on the secondary coil of the high-frequency transformer. (The dual AC high voltage of the sine wave has the characteristics of high efficiency, low energy attenuation, and low radiation.) This improves efficiency by nearly 10 times, making the high-frequency transformer smaller, lower in cost, and more energy-efficient (power factor reaching over 95%). During the energy conversion, some common-mode interference waveforms and differential-mode interference waveforms are transmitted into the power grid, affecting the normal operation of the fundamental wave of the sine wave. Therefore, this structure was designed to reduce EMS conducted interference and EMI radiated interference by 10-15dB without any electronic components. After several experimental tests, all EMC tests were found to be satisfactory. In subsequent use and installation, it can avoid the formation of high-frequency skin effect and electromagnetic eddy current interference in many situations.

Claims

1. A circuit structure for an ozone generator, characterized in that: The circuit consists of two paths. One path connects to an AC220V / 50Hz power supply with a 3A fuse. The output voltage of the AC220V / 50Hz power supply is connected to the windings of pins 1 and 2 of filter L1 and the windings of pins 3 and 4 of filter L1. The output is then connected to two capacitors C1 and C2 to form a π-type filter, which performs differential-mode filtering to generate a clean AC voltage. The output AC voltage is connected in parallel to two capacitors C3 and C4 to form a common-mode filter network, which is then connected to pins 1 and 3 of the full-bridge D1-D4 for rectification. The pulsating DC voltage output from pin 2 of the full-bridge D1-D4 is sequentially connected to two capacitors C5 and C6 for filtering to generate a smooth DC voltage. Pin 2 of the full-bridge D1-D4 is also connected to the drains of NMOS transistors Q1 and Q2. The other path uses a resistor R1 and capacitor C7 connected in parallel to form a resistor-capacitor (RC) step-down network. The step-down output is connected to a full-bridge rectifier (D5-D8). The full-bridge D5-D8 rectifies and outputs a pulsating DC voltage. This pulsating DC voltage is connected to resistor R14, which is connected to the negative terminal of Zener diode D18. The voltage is then regulated and filtered by connecting to the positive terminal of filter capacitor C14. Both the positive terminal of Zener diode D18 and the negative terminal of filter capacitor C14 are connected to the negative terminal of the AC 220V / 50Hz power supply. The output pulsating DC voltage is powered by pins 4 and 8 of the excitation chip IC1. When the excitation chip IC1 is powered, the voltage is supplied through resistors and capacitors R2, R3, R4, C8, and C9 respectively. Pins 2, 6, 7, 8, and 1 of the excitation chip IC1 form an astable square wave generator. Pin 3 of the excitation chip IC1 is connected to resistor R11 and capacitor C10 in sequence to form an integrating circuit. The integrating circuit is connected to pin 1 of transformer B2 for shaping, generating an excitation signal with positive on top and negative on the bottom on the two secondary windings of pins 3, 4, 5, and 6 of transformer B2. The excitation signal is connected to resistors R9 and R10 and diode D10 to drive the gates of NMOS transistors Q1 and Q2 respectively. The generated pulse square wave voltage and the smooth DC current generated by capacitors C5 and C6 are respectively connected to the primary coil of high-frequency transformer B1.

2. The ozone generator circuit structure according to claim 1, characterized in that: The NMOS transistors Q1 and Q2 are IRF-740 transistors.

3. The ozone generator circuit structure according to claim 1, characterized in that: The excitation chip IC1 is model NE555.

4. The ozone generator circuit structure according to claim 1, characterized in that: The capacitors C5 and C6 are energy storage capacitors of 400V / 105n.

5. The ozone generator circuit structure according to claim 1, characterized in that: The generated pulsed square wave voltage is connected to the primary starting coil of the high-frequency transformer B1, and the smooth DC current generated by capacitors C5 and C6 is connected to the primary ending coil of the high-frequency transformer B1, that is, the secondary coil of the high-frequency transformer B1 obtains a sinusoidal high-frequency high voltage.

6. The ozone generator circuit structure according to claim 5, characterized in that: The secondary winding of the high-frequency transformer B1 is connected to the anode of the ozone tube, and the secondary winding of the high-frequency transformer B1 is connected to the cathode of the ozone tube.

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