Ozone generation device and nitrogen oxide analyzer

Abstract

The application discloses an ozone generating device and a nitrogen oxide analyzer, wherein the device comprises a high-voltage plate, a low-frequency high-voltage transformer and a high-voltage discharge tube; the input end of the high-voltage plate is connected with a switching power supply, the output end of the high-voltage plate is connected with the input end of the low-frequency high-voltage transformer, and the high-voltage plate is used for outputting a driving signal to control the low-frequency high-voltage transformer to perform low-frequency voltage boosting work; the output end of the low-frequency high-voltage transformer is connected with the input end of the high-voltage discharge tube, and the low-frequency high-voltage transformer is used for providing a low-frequency boosted direct-current voltage to the high-voltage discharge tube, wherein the secondary winding of the low-frequency high-voltage transformer adopts a two-stage boosting mode; and the high-voltage discharge tube is used for generating ozone by electrode breakdown of air. Thus, by adopting the low-frequency voltage boosting technology, the high-voltage amplitude generated by the low-frequency high-voltage transformer is fixed, the period is fixed, and the pulse width is fixed, so that the ozone concentration generated is ensured to be stable, high-frequency electric interference is effectively avoided, and the service life of the ozone generating device is prolonged.

Description

Technical Field

[0001] This invention relates to the field of gas detection technology, and more particularly to an ozone generator and a nitrogen oxide analyzer. Background Technology

[0002] Most nitrogen oxide analyzers in the field of atmospheric monitoring adopt the principle of chemiluminescence. Nitric oxide (NO) reacts with ozone (O3) to produce excited-state nitrogen dioxide molecules (NO2). The excited-state nitrogen dioxide (NO2*) itself is unstable. When it transitions back to the ground state, it releases light with a certain energy. The intensity of the released light energy is linearly related to the concentration of NO. The analyzer detects the NO content by detecting the light intensity.

[0003] Currently, ozone generators from domestic and foreign manufacturers mainly use a high-voltage plate, a high-voltage device, and a high-voltage discharge tube. The high-voltage plate generates a drive signal to drive the high-voltage device, which generates high voltage. The high-voltage device is connected to the high-voltage discharge tube, which generates high-concentration ozone.

[0004] However, the problem with the related technology is that the transformer is generally a high-frequency high-voltage transformer, which usually uses a frequency of tens of kilohertz and a voltage of several kilovolts. However, the electrode spacing of the corresponding high-voltage discharge tube is small, which leads to large high-frequency electrical interference and the discharge tube is prone to short circuit, causing damage to the transformer. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to provide an ozone generator that, by employing low-frequency boost technology, ensures a fixed high-voltage amplitude, fixed period, and fixed pulse width generated by a low-frequency high-voltage transformer, thereby guaranteeing a stable ozone concentration and effectively avoiding high-frequency electrical interference, thus extending the lifespan of the ozone generator.

[0006] The second objective of this invention is to provide a nitrogen oxide analyzer.

[0007] To achieve the above objectives, the ozone generating device proposed in the first aspect of the present invention includes: a high-voltage board, a low-frequency high-voltage transformer, and a high-voltage discharge tube; the input terminal of the high-voltage board is connected to a switching power supply, and the output terminal of the high-voltage board is connected to the input terminal of the low-frequency high-voltage transformer; the high-voltage board is used to output a drive signal to control the low-frequency high-voltage transformer to perform low-frequency boost operation; the output terminal of the low-frequency high-voltage transformer is connected to the input terminal of the high-voltage discharge tube; the low-frequency high-voltage transformer is used to provide the high-voltage discharge tube with a low-frequency boosted DC voltage; wherein the secondary winding of the low-frequency high-voltage transformer adopts a two-stage boost mode; the high-voltage discharge tube is used to generate ozone by breaking down air through electrodes.

[0008] According to an embodiment of the ozone generator of the present invention, a high-voltage board outputs a drive signal to control a low-frequency high-voltage transformer to perform low-frequency voltage boosting. The low-frequency high-voltage transformer then provides a low-frequency boosted DC voltage to a high-voltage discharge tube, which generates ozone by breaking down air through its electrodes. Thus, by employing low-frequency voltage boosting technology, the high-voltage amplitude, period, and pulse width generated by the low-frequency high-voltage transformer are fixed, thereby ensuring a stable ozone concentration and effectively avoiding high-frequency electrical interference, thus extending the lifespan of the ozone generator.

[0009] In addition, the ozone generator according to the above embodiments of the present invention may also have the following additional technical features:

[0010] According to one embodiment of the present invention, the high-voltage board includes: a DC voltage output unit, a first capacitor, a second capacitor, a first switching transistor, a second switching transistor, and a control output unit, wherein the input terminal of the DC voltage output unit is connected to the switching power supply; one end of the first capacitor is connected to the output terminal of the DC voltage output unit, and the other end of the first capacitor is grounded; the input terminal of the first switching transistor is connected to the output terminal of the DC voltage output unit, the output terminal of the first switching transistor is connected to the input terminal of the low-frequency high-voltage transformer, and the control terminal of the first switching transistor is connected to the control output unit; one end of the second capacitor is connected to the input terminal of the low-frequency high-voltage transformer, and the other end of the second capacitor is grounded; the input terminal of the second switching transistor is connected to the output terminal of the first switching transistor, the output terminal of the second switching transistor is grounded, and the control terminal of the second switching transistor is connected to the control output unit.

[0011] According to one embodiment of the present invention, the high-voltage board is specifically used to output a first drive signal through the control output unit to control the first switch to turn on and control the second switch to turn off, so that the DC voltage output unit charges the second capacitor through the low-frequency high-voltage transformer and the first switch.

[0012] According to one embodiment of the present invention, the high-voltage board is further configured to output a second drive signal through the control output unit to control the second switch to turn on and control the first switch to turn off, so that the second capacitor discharges through the low-frequency high-voltage transformer and the second switch.

[0013] According to one embodiment of the present invention, the voltage of the switching power supply is 24V, the voltage output by the DC voltage unit is 14V, and the DC voltage after low-frequency boost is 14KV.

[0014] According to one embodiment of the present invention, the control output unit includes a square wave generator, a pulse width controller, an inverter, and a field-effect transistor (FET) driver. The output terminal of the square wave generator is connected to the input terminal of the pulse width controller, and the square wave generator generates a first square wave signal, wherein the first square wave signal is a low-frequency square wave signal. The output terminal of the pulse width controller is connected to the input terminal of the inverter, and the pulse width controller controls the pulse width of the first square wave signal to split it into two square wave signals, wherein the two square wave signals are 180° out of phase. The output terminal of the inverter is connected to the input terminal of the FET driver, and the inverter inverts the amplitude of the two square wave signals. The output terminal of the FET driver is connected to the control terminals of the first and second switching transistors, respectively, and the FET driver inverts the amplitude of the two square wave signals input by the inverter and increases the amplitude of the two square wave signals to output the two square wave signals as dual-path pulse waves.

[0015] According to one embodiment of the present invention, the frequency of the dual-path pulse wave is 60 Hz, the amplitude is 14 V, and the phase difference is 180°.

[0016] According to one embodiment of the present invention, the high-voltage discharge tube includes a hollow glass tube with an inlet and an outlet at both ends. The hollow glass tube includes an inner glass tube and an outer glass tube. The inner glass tube is connected to the outer glass tube to form a cavity. The inlet and the outlet are respectively connected to the cavity. The inner surface of the inner glass tube is coated with a conductive material as a first electrode. The outer surface of the outer glass tube is coated with a conductive material as a second electrode. The hollow glass tube is sealed with a sealing material.

[0017] According to one embodiment of the present invention, the low-frequency high-voltage transformer is shielded with an aluminum shell and sealed with potting compound, and the output terminal of the low-frequency high-voltage transformer is connected to the first electrode and the second electrode of the high-voltage discharge tube by a fully sealed banana connector.

[0018] To achieve the above objectives, the nitrogen oxide analyzer proposed in the second aspect of the present invention includes the ozone generating device described in the above-described embodiments of the present invention.

[0019] According to the nitrogen oxide analyzer of the present invention, the aforementioned ozone generator is used. By employing low-frequency boost technology, the high voltage amplitude, period, and pulse width generated by the low-frequency high-voltage transformer are fixed, thereby ensuring a stable ozone concentration and effectively avoiding high-frequency electrical interference, thus extending the lifespan of the ozone generator.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is a block diagram of an ozone generator according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a low-frequency high-voltage transformer according to an embodiment of the present invention;

[0023] Figure 3 This is an electrical schematic diagram of a high-voltage board according to an embodiment of the present invention;

[0024] Figure 4 This is a block diagram of a control output unit according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of a high-voltage discharge tube according to an embodiment of the present invention;

[0026] Figure 6 This is a block diagram of a nitrogen oxide analyzer according to an embodiment of the present invention. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] The ozone generator and nitrogen oxide analyzer of the present invention are described below with reference to the accompanying drawings.

[0029] Figure 1 This is a block diagram of an ozone generator according to an embodiment of the present invention.

[0030] Specifically, in some embodiments of the present invention, such as Figure 1 As shown, the ozone generator 100 includes: a high-voltage plate 10, a low-frequency high-voltage transformer 20, and a high-voltage discharge tube 30.

[0031] The high-voltage board 10 has its input terminal connected to a switching power supply and its output terminal connected to the input terminal of a low-frequency high-voltage transformer 20. The high-voltage board 10 is used to output a drive signal to control the low-frequency high-voltage transformer 20 to perform low-frequency boost operation. The output terminal of the low-frequency high-voltage transformer 20 is connected to the input terminal of a high-voltage discharge tube 30. The low-frequency high-voltage transformer 20 is used to provide the high-voltage discharge tube 30 with a low-frequency boosted DC voltage. The secondary winding of the low-frequency high-voltage transformer 20 adopts a two-stage boost mode. The high-voltage discharge tube 30 is used to generate ozone by breaking down the air through electrodes.

[0032] Specifically, in this embodiment of the invention, the drive signal output by the high-voltage board 10 can control the low-frequency high-voltage transformer 20, so that the low-frequency high-voltage transformer 20 performs low-frequency voltage boosting operation. It should be understood that, compared to transformers in the prior art that use conventional primary and secondary windings for voltage boosting, such as... Figure 2 As shown, in this embodiment of the invention, the low-frequency high-voltage transformer 20 increases the core frame so that the secondary winding can adopt a two-stage boost mode. At this time, the turns ratio of the low-frequency high-voltage transformer 20 can reach 1:1000, so as to improve the boost capability of the low-frequency high-voltage transformer. Then, the high-voltage discharge tube 30 can use the DC voltage after low-frequency boost provided by the low-frequency high-voltage transformer 20 to break down the air through the electrodes to stably generate ozone.

[0033] It should be noted that, in the above embodiments of the present invention, the low-frequency high-voltage transformer 20 can be separately packaged and externally mounted.

[0034] Therefore, the ozone generator 100 according to the present invention employs low-frequency boost technology to fix the high voltage amplitude, period, and pulse width generated by the low-frequency high-voltage transformer, thereby ensuring a stable ozone concentration and effectively avoiding high-frequency electrical interference, thus extending the lifespan of the ozone generator.

[0035] Furthermore, in some embodiments of the present invention, such as Figure 3 As shown, the high-voltage board 10 includes: a DC voltage output unit 101, a first capacitor C1, a second capacitor C2, a first switching transistor Q1, a second switching transistor Q2, and a control output unit 102.

[0036] Among them, such as Figure 2 As shown, the input terminal of the DC voltage output unit 101 is connected to the switching power supply; one end of the first capacitor C1 is connected to the output terminal of the DC voltage output unit 101, and the other end of the first capacitor C1 is grounded; the input terminal of the first switch Q1 is connected to the output terminal of the DC voltage output unit 101, the output terminal of the first switch Q1 is connected to the input terminal of the low-frequency high-voltage transformer 20, and the control terminal of the first switch Q1 is connected to the control output unit 102; one end of the second capacitor C2 is connected to the input terminal of the low-frequency high-voltage transformer 20, and the other end of the second capacitor C2 is grounded; the input terminal of the second switch Q2 is connected to the output terminal of the first switch Q1, the output terminal of the second switch Q2 is grounded, and the control terminal of the second switch Q2 is connected to the control output unit 102.

[0037] It is understood that in this embodiment of the present invention, the high-voltage board 10 mainly realizes the control of the low-frequency high-voltage transformer 20. For example, the high-voltage board 10 can convert the voltage of the switching power supply through the DC voltage output unit 101 to output the corresponding DC voltage, and output the corresponding drive signal through the control output unit 102 to switch the switching state of the first switch Q1 and the second switch Q2, thereby realizing the control of the transformer.

[0038] Optionally, in the above embodiments of the present invention, the first capacitor C1 and the second capacitor C2 are large-capacity capacitors.

[0039] The following is in conjunction with the appendix Figure 3 The specific control process of the low-frequency high-voltage transformer 20 in this embodiment of the invention will be described accordingly:

[0040] Specifically, in some embodiments of the present invention, the high-voltage board 10 is specifically used to control the first switch Q1 to turn on and the second switch Q2 to turn off by outputting a first drive signal through the control output unit 102, so that the DC voltage output unit 101 charges the second capacitor C2 through the low-frequency high-voltage transformer 20 and the first switch Q1.

[0041] It is understood that in this embodiment of the present invention, when the high-voltage board 10 outputs the first drive signal through the control output unit 102, the first switch Q1 is turned on and the second switch Q2 is turned off. At this time, the DC voltage output unit 101 and the first capacitor C1 can charge the second capacitor C2 through the first switch Q1 and the low-frequency high-voltage transformer 20. However, due to the long charging time, there is no obvious voltage change at the input terminal of the low-frequency high-voltage transformer 20, so no high voltage is generated at the output terminal of the low-frequency high-voltage transformer 20.

[0042] More specifically, in some embodiments of the present invention, the high-voltage board 10 is also used to control the second switch Q2 to turn on by outputting a second drive signal through the control output unit 102, and to control the first switch Q1 to turn off, so that the second capacitor C2 discharges through the low-frequency high-voltage transformer 20 and the second switch Q2.

[0043] It is understood that in this embodiment of the present invention, when the high-voltage board 10 outputs the second drive signal through the control output unit 102, the second switch Q1 is turned on and the first switch Q2 is turned off. At this time, the second capacitor C2 discharges through the low-frequency high-voltage transformer 20 and the second switch Q2. Since the charge of the second capacitor C2 is rapidly discharged, the output terminal of the low-frequency high-voltage transformer 20 outputs high voltage.

[0044] Optionally, in some embodiments of the present invention, the voltage of the switching power supply is 24V, the voltage output by the DC voltage unit 101 is 14V, and the DC voltage after low-frequency boost is 14KV.

[0045] It is understood that in this embodiment of the present invention, the DC voltage output unit 101 can realize voltage conversion through the synchronous buck control chip LM25116 to convert the DC 24V of the switching power supply to DC 14V, and the low-frequency high-voltage boost converter 20 can boost the DC 14V output by the DC voltage unit 101 to DC 14KV.

[0046] Furthermore, in some embodiments of the present invention, such as Figure 4 As shown, the control output unit 102 includes a square wave generator 1021, a pulse width controller 1022, an inverter 1023, and a field-effect transistor driver 1024.

[0047] The square wave generator 1021 is connected to the input of the pulse width controller 1022. The square wave generator 1021 generates a first square wave signal, which is a low-frequency square wave signal. The output of the pulse width controller 1022 is connected to the input of the inverter 1023. The pulse width controller 1022 controls the pulse width of the first square wave signal to split it into two square wave signals, which are 180° out of phase. The output of the inverter 1023 is connected to the input of the field-effect transistor driver 10224. The inverter 1023 inverts the amplitude of the two square wave signals. The output of the field-effect transistor driver 1024 is connected to the control terminals of the first switch Q1 and the second switch Q2, respectively. The field-effect transistor driver 1024 inverts the amplitude of the two square wave signals input to the inverter 1023 and increases the amplitude of the two square wave signals to output the two square wave signals as dual-path pulse waves.

[0048] Specifically, in this embodiment of the present invention, the square wave generator 1021 can generate a first square wave signal (i.e., a low-frequency square wave signal) with a period of 60 Hz, a pulse width of 8.33 ms, and an amplitude of 5V through the time base integrated chip NE555. Then, after the first square wave signal passes through the pulse width controller 1022, the pulse width controller 1022 can divide the first square wave signal into two square wave signals, wherein the pulse width of the two square waves is 0.3 ms, the amplitude is 5V, and the phase difference between the two square wave signals is 180°. Then, the inverter 1023 inverts the amplitude of the two square wave signals (i.e., the amplitude of 5V becomes 0V, and the amplitude of 0V becomes 5V). The field effect transistor driver 1024 inverts the amplitude of the two square wave signals input to the inverter 1023 and increases the amplitude of the two square wave signals (for example, converting the amplitude of the square wave signal from 5V to 14V) so as to output the two square wave signals as dual pulse waves.

[0049] Optionally, in some embodiments of the present invention, the frequency of the dual-path pulse wave is 60 Hz, the amplitude is 14 V, and the phase difference is 180°.

[0050] It is understood that in this embodiment of the present invention, the state switching of the first switch Q1 and the second switch Q2 is achieved by using dual-path pulse wave output, thereby realizing low-frequency boost control of the low-frequency high-voltage transformer 20.

[0051] Specifically, in the above embodiments of the present invention, compared with the ozone generator scheme using a high-frequency high-voltage transformer, the low-frequency high-voltage transformer 20 in the embodiments of the present invention uses low-frequency boost technology, resulting in lower electrical interference and lower power consumption. At the same time, due to the use of low-frequency pulse width control technology, the energy output from the high-voltage board 10 to the low-frequency high-voltage transformer 20 is fixed, that is, the capacity of a capacitor, and this energy is input to the low-frequency high-voltage transformer 20 with a fixed period and a fixed pulse width. Therefore, the high voltage amplitude, period and pulse width generated by the low-frequency high-voltage transformer 20 are fixed each time, resulting in a very stable ozone concentration.

[0052] Furthermore, in some embodiments of the present invention, such as Figure 5 As shown, the high-voltage discharge tube 30 includes a hollow glass tube with an inlet and an outlet at both ends. The hollow glass tube includes an inner glass tube and an outer glass tube. The inner glass tube is connected to the outer glass tube to form a cavity. The inlet and outlet are respectively connected to the cavity. The inner surface of the inner glass tube is coated with a conductive material as a first electrode. The outer surface of the outer glass tube is coated with a conductive material as a second electrode. The hollow glass tube is sealed with a sealing material.

[0053] For example, in the above embodiments of the present invention, such as Figure 5 As shown, the first electrode of the high-voltage discharge tube 30 can be formed by connecting a wire to the conductive material (e.g., silver paste) on the outer surface of the outer glass tube, and the second electrode of the high-voltage discharge tube 30 can be formed by connecting another wire to a copper sheet and then placing the copper sheet into the inner glass tube and connecting it to the conductive material (e.g., silver paste) on the inner surface. In addition, the other ends of the two wires can be connected to the low-frequency high-voltage transformer 20 through different connectors so that the high-voltage discharge tube 30 can perform high-voltage discharge through the first electrode and the second electrode.

[0054] It is understood that, in this embodiment of the present invention, compared with the high-voltage discharge tube using tungsten wire and glass tube, the high-voltage discharge tube 30 of the present invention has a double-layer glass tube structure. The inner glass tube is connected to the outer glass tube to form a cavity, and the air inlet and outlet are respectively connected to the cavity. At the same time, the hollow glass tube is sealed with a sealing material, so there is no problem of electrode oxidation. Meanwhile, the high-voltage discharge tube 30 is used as the load of the low-frequency high-voltage transformer 20. Because the cavity distance between the double-layer glass tube structure is large, the cavity is not easy to be blocked, so water vapor will not short-circuit the first electrode and the second electrode, making the high-voltage discharge tube 30 and the low-frequency high-voltage transformer 20 work stably, which is beneficial to improving the service life of the high-voltage discharge tube 30 and the low-frequency high-voltage transformer 20.

[0055] Furthermore, in some embodiments of the present invention, the low-frequency high-voltage transformer 20 is shielded with an aluminum shell and sealed with potting compound, and the output terminal of the low-frequency high-voltage transformer 20 is connected to the first electrode and the second electrode of the high-voltage discharge tube 30 with a fully sealed banana connector.

[0056] It is understood that, since the low-frequency high-voltage transformer 20 in the embodiments of the present invention achieves a thousand-fold increase in voltage, in order to protect high voltage safety, the low-frequency high-voltage transformer 20 can be shielded with an aluminum shell and sealed with potting compound. Furthermore, the output terminal of the low-frequency high-voltage transformer 20 is connected to the first and second electrodes of the high-voltage discharge tube 30 with a fully sealed banana plug, so that the high-voltage wireless connection is safer than the wired high-voltage connection scheme.

[0057] In summary, the ozone generator according to embodiments of the present invention utilizes a high-voltage board to output a drive signal to control a low-frequency high-voltage transformer to perform low-frequency boost operation. The low-frequency high-voltage transformer then provides a low-frequency boosted DC voltage to a high-voltage discharge tube, which generates ozone by breaking down air through its electrodes. Therefore, by employing low-frequency boost technology, the high-voltage amplitude, period, and pulse width generated by the low-frequency high-voltage transformer are fixed, thereby ensuring a stable ozone concentration and effectively avoiding high-frequency electrical interference, thus extending the lifespan of the ozone generator.

[0058] Figure 6 This is a block diagram of a nitrogen oxide analyzer according to an embodiment of the present invention.

[0059] Specifically, in some embodiments of the present invention, such as Figure 6 As shown, the nitrogen oxide analyzer 1000 includes the ozone generator 100 described in the above embodiment of the present invention.

[0060] It should be noted that the specific implementation of the nitrogen oxide analyzer 1000 in this embodiment of the invention can be found in the specific implementation of the ozone generator described in the foregoing embodiments of the invention. To reduce redundancy, it will not be repeated here.

[0061] In summary, the nitrogen oxide analyzer according to the embodiments of the present invention uses the aforementioned ozone generator. By employing low-frequency boost technology, the high voltage amplitude, period, and pulse width generated by the low-frequency high-voltage transformer are fixed, thereby ensuring a stable ozone concentration and effectively avoiding high-frequency electrical interference, thus extending the lifespan of the ozone generator.

[0062] It should be understood that in the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0066] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0067] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An ozone generator, characterized in that, The device includes: a high-voltage board, a low-frequency high-voltage transformer, and a high-voltage discharge tube; The input terminal of the high-voltage board is connected to the switching power supply, and the output terminal of the high-voltage board is connected to the input terminal of the low-frequency high-voltage transformer. The high-voltage board is used to output a drive signal to control the low-frequency high-voltage transformer to perform low-frequency boost operation. The output terminal of the low-frequency high-voltage transformer is connected to the input terminal of the high-voltage discharge tube. The low-frequency high-voltage transformer is used to provide the high-voltage discharge tube with a low-frequency boosted DC voltage. The secondary winding of the low-frequency high-voltage transformer adopts a two-stage boost mode. The high-voltage discharge tube is used to generate ozone by breaking down air through electrodes. The high-voltage board includes: a DC voltage output unit, a first capacitor, a second capacitor, a first switching transistor, a second switching transistor, and a control output unit, wherein... The input terminal of the DC voltage output unit is connected to the switching power supply; One end of the first capacitor is connected to the output terminal of the DC voltage output unit, and the other end of the first capacitor is grounded. The input terminal of the first switching transistor is connected to the output terminal of the DC voltage output unit, the output terminal of the first switching transistor is connected to the input terminal of the low-frequency high-voltage transformer, and the control terminal of the first switching transistor is connected to the control output unit. One end of the second capacitor is connected to the input terminal of the low-frequency high-voltage transformer, and the other end of the second capacitor is grounded. The input terminal of the second switch is connected to the output terminal of the first switch, the output terminal of the second switch is grounded, and the control terminal of the second switch is connected to the control output unit.

2. The ozone generator according to claim 1, characterized in that, The high-voltage board is specifically used to output a first drive signal through the control output unit to control the first switch to turn on and control the second switch to turn off, so that the DC voltage output unit charges the second capacitor through the low-frequency high-voltage transformer and the first switch.

3. The ozone generator according to claim 2, characterized in that, The high-voltage board is also used to output a second drive signal through the control output unit to control the second switch to turn on and control the first switch to turn off, so that the second capacitor discharges through the low-frequency high-voltage transformer and the second switch.

4. The ozone generator according to claim 3, characterized in that, The voltage of the switching power supply is 24V, the voltage output of the DC voltage unit is 14V, and the DC voltage after low-frequency boost is 14kV.

5. The ozone generator according to claim 1, characterized in that, The control output unit includes a square wave generator, a pulse width controller, an inverter, and a field-effect transistor driver, wherein... The output terminal of the square wave generator is connected to the input terminal of the pulse width controller. The square wave generator is used to generate a first square wave signal, wherein the first square wave signal is a low-frequency square wave signal. The output terminal of the pulse width controller is connected to the input terminal of the inverter. The pulse width controller is used to perform pulse width control on the first square wave signal to divide it into two square wave signals, wherein the two square wave signals are 180° out of phase. The output terminal of the inverter is connected to the input terminal of the field-effect transistor driver, and the inverter is used to invert the amplitude of the two square wave signals. The output terminal of the field-effect transistor driver is connected to the control terminal of the first switch and the control terminal of the second switch respectively. The field-effect transistor driver is used to invert the amplitude of the two square wave signals input by the inverter and increase the amplitude of the two square wave signals so as to output the two square wave signals as dual pulse waves.

6. The ozone generator according to claim 5, characterized in that, The dual-path pulse wave has a frequency of 60Hz, an amplitude of 14V, and a phase difference of 180°.

7. The ozone generator according to claim 1, characterized in that, The high-voltage discharge tube includes a hollow glass tube with an inlet and an outlet at both ends. The hollow glass tube includes an inner glass tube and an outer glass tube. The inner glass tube is connected to the outer glass tube to form a cavity. The inlet and outlet are respectively connected to the cavity. The inner surface of the inner glass tube is coated with a conductive material as a first electrode. The outer surface of the outer glass tube is coated with a conductive material as a second electrode. The hollow glass tube is sealed with a sealing material.

8. The ozone generator according to claim 7, characterized in that, The low-frequency high-voltage transformer is shielded with an aluminum shell and sealed with potting compound. The output terminal of the low-frequency high-voltage transformer is connected to the first and second electrodes of the high-voltage discharge tube using a fully sealed banana connector.

9. A nitrogen oxide analyzer, characterized in that, The nitrogen oxide analyzer includes an ozone generator as described in any one of claims 1-8.

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