CN117585646A - Ozone generator and nitrogen oxide analyzer - Google Patents

Abstract

The invention discloses an ozone generating device and a nitrogen oxide analyzer, wherein the device comprises: a high voltage board, a low frequency high voltage transformer and a high voltage discharge tube; the input end of the high-voltage board is connected with the switching power supply, the output end of the high-voltage board is connected with the input end of the low-frequency high-voltage transformer, and the high-voltage board is used for outputting a driving signal to control the low-frequency high-voltage transformer to perform low-frequency boosting operation; 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 low-frequency boosted direct-current voltage for the high-voltage discharge tube, wherein a secondary winding of the low-frequency high-voltage transformer adopts a two-stage boosting mode; the high voltage discharge tube is used to break down air through the electrodes to produce ozone. Therefore, by adopting a low-frequency 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 concentration of generated ozone is ensured to be stable, the high-frequency electric interference is effectively avoided, and the service life of the ozone generating device is prolonged.

Description

Ozone generator and nitrogen oxide analyzer

Technical field

The invention relates to the technical field of gas detection, and in particular to an ozone generating device and a nitrogen oxide analyzer.

Background technique

Most nitrogen oxide analyzers in the field of atmospheric monitoring adopt the principle of chemiluminescence method. Nitric oxide (NO) and ozone (O3) react to produce excited state nitrogen dioxide molecules (NO2). The excited state of 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 light energy released at this time has a linear relationship with the concentration of NO. The analyzer detects the content of NO by detecting the light intensity.

At present, ozone generators from domestic and foreign manufacturers mainly use high-voltage plates, high-voltage devices, and high-voltage discharge tubes. The high-voltage plate generates a driving signal to drive the high-voltage device. The high-voltage device generates high voltage. The high-voltage device is connected to the high-voltage discharge tube. The high-voltage discharge tube generates high voltage. Concentration of ozone.

However, the problem with the related technology is that the transformer is generally a high-frequency and high-voltage transformer, usually using a frequency of tens of kilohertz and a high voltage of several thousand volts. However, the electrode spacing of the corresponding high-voltage discharge tube is small, there is large high-frequency electrical interference, and the discharge tube is easy to short-circuit. Cause problems such as transformer damage.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art, at least to a certain extent. To this end, the first purpose of the present invention is to propose an ozone generating device that uses low-frequency boost technology to make the high-voltage generated by the low-frequency high-voltage transformer have a fixed amplitude, a fixed period and a fixed pulse width, thereby ensuring a stable ozone concentration. It also effectively avoids high-frequency electrical interference and extends the life of the ozone generating device.

The second object of the present invention is to provide a nitrogen oxide analyzer.

In order to achieve the above object, the ozone generating device proposed in the first embodiment of the present invention includes: 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 to a switching power supply, and the output end of the high-voltage plate Connected to the input end of the low-frequency high-voltage transformer, the high-voltage board is used to output 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 to the input of the high-voltage discharge tube terminals connected, the low-frequency high-voltage transformer is used to provide low-frequency boosted DC voltage to the high-voltage discharge tube, 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 pass through The electrodes break down the air to produce ozone.

According to the ozone generating device according to the embodiment of the present invention, the high-voltage board is used to output a driving signal to control the low-frequency high-voltage transformer to perform low-frequency voltage boosting work, and then the low-frequency high-voltage transformer is used to provide the low-frequency boosted DC voltage to the high-voltage discharge tube, and, using The high-voltage discharge tube breaks down the air through electrodes to produce ozone. Therefore, by using low-frequency boost technology, the high-voltage generated by the low-frequency high-voltage transformer has a fixed amplitude, a fixed period, and a fixed pulse width, thereby ensuring a stable ozone concentration, effectively avoiding high-frequency electrical interference, and extending the life of the ozone generating device.

In addition, the ozone generating device according to the above embodiment of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the high-voltage board includes: a DC voltage output unit, a first capacitor, a second capacitor, a first switch tube, a second switch tube and a control output unit, wherein the DC voltage output unit The input end is connected to the switching power supply; one end of the first capacitor is connected to the output end of the DC voltage output unit, and the other end of the first capacitor is grounded; the input end of the first switching tube is connected to the The output end of the DC voltage output unit is connected, the output end of the first switching tube is connected to the input end of the low-frequency high-voltage transformer, the control end of the first switching tube is connected to the control output unit; the second One end of the capacitor is connected to the input end of the low-frequency and high-voltage transformer, and the other end of the second capacitor is connected to ground; the input end of the second switching tube is connected to the output end of the first switching tube, and the second switch The output end of the tube is connected to ground, and the control end of the second switch tube is connected to the control output unit.

According to an embodiment of the present invention, the high-voltage board is specifically configured to output a first drive signal through the control output unit to control the first switch tube to be turned on, and to control the second switch tube to be turned off, so that The DC voltage output unit charges the second capacitor through the low-frequency and high-voltage transformer and the first switching tube.

According to an 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 tube to be turned on, and to control the first switch tube to be turned off, so that The second capacitor is discharged through the low-frequency and high-voltage transformer and the second switching tube.

According to an 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 low-frequency boosted DC voltage is 14KV.

According to an 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 driver, wherein the output end of the square wave generator is connected to the pulse width control unit. The input end of the controller is connected to the square wave generator, and 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 end of the pulse width controller is connected to the inverter. is connected to the input end of The output end of the field effect transistor driver is connected to the input end of the field effect transistor driver, and the inverter is used to invert the amplitude of the two square wave signals; the output end of the field effect transistor driver is respectively connected to the first The control terminal of a switching tube is connected to the control terminal of the second switching tube. The field effect tube driver is used to invert the amplitude of the two square wave signals input by the inverter and increase the amplitude of the square wave signal input by the inverter. The amplitude of the two-way square wave signals is used to output the two-way square wave signals as two-way pulse waves.

According to an embodiment of the present invention, the frequency of the two-way pulse wave is 60HZ, the amplitude is 14V, and the phase difference is 180°.

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

According to an embodiment of the present invention, the low-frequency and high-voltage transformer is shielded by an aluminum shell and sealed with glue, and the output end of the low-frequency and high-voltage transformer is connected to the first electrode and the second electrode of the high-voltage discharge tube by a fully sealed banana joint. The electrodes are connected.

In order to achieve the above object, the nitrogen oxide analyzer proposed by the second embodiment of the present invention includes the ozone generating device of the above embodiment of the present invention.

The nitrogen oxide analyzer according to the embodiment of the present invention adopts the aforementioned ozone generating device and uses low-frequency voltage boosting technology to make the high-voltage generated by the low-frequency high-voltage transformer have a fixed amplitude, a fixed period and a fixed pulse width, thereby ensuring a stable ozone concentration. It also effectively avoids high-frequency electrical interference and extends the life of the ozone generating device.

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.

Description of drawings

Figure 1 is a block diagram of an ozone generating device according to an embodiment of the present invention;

Figure 2 is a schematic structural diagram of a low-frequency and high-voltage transformer according to an embodiment of the present invention;

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

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

Figure 5 is a schematic structural diagram of a high-voltage discharge tube according to an embodiment of the present invention;

Figure 6 is a block schematic diagram of a nitrogen oxide analyzer according to an embodiment of the present invention.

Detailed ways

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 throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and are not to be construed as limiting the present invention.

The ozone generating device and nitrogen oxide analyzer according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

Figure 1 is a block diagram of an ozone generating device according to an embodiment of the present invention.

Specifically, in some embodiments of the present invention, as shown in FIG. 1 , the ozone generating device 100 includes: a high-voltage plate 10 , a low-frequency high-voltage transformer 20 and a high-voltage discharge tube 30 .

Among them, the input end of the high-voltage board 10 is connected to the switching power supply, and the output end of the high-voltage board 10 is connected to the input end of the low-frequency high-voltage transformer 20. The high-voltage board 10 is used to output a driving signal to control the low-frequency high-voltage transformer 20 to perform low-frequency voltage boosting work; The output end of the low-frequency high-voltage transformer 20 is connected to the input end of the high-voltage discharge tube 30. The low-frequency high-voltage transformer 20 is used to provide low-frequency boosted DC voltage to the high-voltage discharge tube 30. 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 break down the air through electrodes to generate ozone.

Specifically, in this embodiment of the present invention, the driving 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 work. It should be understood that compared with the current In the art, the transformer uses a conventional primary winding and a secondary winding to boost the voltage. As shown in Figure 2, the low-frequency high-voltage transformer 20 in the embodiment of the present invention can use a two-stage secondary winding by increasing the magnetic core skeleton. In the boost mode, the turns ratio of the low-frequency high-voltage transformer 20 can reach 1:1000 to enhance the voltage-boosting capability of the low-frequency high-voltage transformer. Furthermore, the high-voltage discharge tube 30 can use the low-frequency boosted DC provided by the low-frequency high-voltage transformer 20 The voltage passes through the electrodes to break down the air to stably produce ozone.

It should be noted that in the above-mentioned embodiment of the present invention, the low-frequency and high-voltage transformer 20 can be separately packaged and externally installed.

Therefore, the ozone generating device 100 according to the embodiment of the present invention uses low-frequency boost technology to make the high-voltage generated by the low-frequency high-voltage transformer have a fixed amplitude, a fixed period, and a fixed pulse width, thereby ensuring a stable ozone concentration and effectively avoiding high-frequency Eliminate electrical interference and extend the life of the ozone generating device.

Further, in some embodiments of the present invention, as shown in FIG. 3 , the high-voltage board 10 includes: a DC voltage output unit 101, a first capacitor C1, a second capacitor C2, a first switching tube Q1, and a second switching tube Q2. and control output unit 102.

As shown in Figure 2, the input end 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 end of the DC voltage output unit 101, and the other end of the first capacitor C1 is connected to ground; the first switch The input end of the tube Q1 is connected to the output end of the DC voltage output unit 101, the output end of the first switching tube Q1 is connected to the input end of the low-frequency high-voltage transformer 20, and the control end of the first switching tube Q1 is connected to the control output unit 102; One end of the second capacitor C2 is connected to the input end of the low-frequency and high-voltage transformer 20, and the other end of the second capacitor C2 is connected to ground; the input end of the second switching tube Q2 is connected to the output end of the first switching tube Q1, and the output of the second switching tube Q2 The control end of the second switching tube Q2 is connected to the control output unit 102 .

It can be understood that in this embodiment of the present invention, the high-voltage board 10 mainly controls 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 the corresponding driving signal is output through the control output unit 102 to switch the switching state of the first switching tube Q1 and the second switching tube Q2, thereby realizing control of the transformer.

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

The specific control process of the low-frequency and high-voltage transformer 20 according to the embodiment of the present invention will be described below with reference to Figure 3:

Specifically, in some embodiments of the present invention, the high-voltage board 10 is specifically configured to output a first driving signal by controlling the output unit 102 to control the first switching tube Q1 to turn on, and to control the second switching tube Q2 to turn off, so that The DC voltage output unit 101 charges the second capacitor C2 through the low-frequency and high-voltage transformer 20 and the first switching tube Q1.

It can be understood that in this embodiment of the present invention, when the high-voltage board 10 outputs the first driving 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 The 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 end of the low-frequency high-voltage transformer 20, so the low-frequency high-voltage transformer 20 has no obvious voltage change. No high voltage is generated at the output end of the transformer 20 .

More specifically, in some embodiments of the present invention, the high-voltage board 10 is also used to output a second driving signal by controlling the output unit 102 to control the second switching tube Q2 to turn on, and to control the first switching tube Q1 to turn off, The second capacitor C2 is discharged through the low-frequency and high-voltage transformer 20 and the second switching tube Q2.

It can be understood that in this embodiment of the present invention, when the high voltage board 10 outputs the second driving signal through the control output unit 102, the second switching tube Q1 is turned on and the first switching tube Q2 is turned off. At this time, the third switching tube Q1 is turned on and the first switching tube Q2 is turned off. The second capacitor C2 is discharged through the low-frequency high-voltage transformer 20 and the second switching tube Q2. Since the power of the second capacitor C2 is rapidly discharged, the output end of the low-frequency high-voltage transformer 20 outputs high voltage.

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 low-frequency boosted DC voltage is 14KV.

It can be 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 24V DC of the switching power supply into 14V DC. The low-frequency, low-frequency, high-voltage booster 20 The low-frequency DC 14V output by the DC voltage unit 101 can be boosted to DC 14KV.

Further, in some embodiments of the present invention, as shown in FIG. 4 , 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.

Wherein, the output end of the square wave generator 1021 is connected to the input end of the pulse width controller 1022, and the square wave generator 1021 is used to generate a first square wave signal, wherein the first square wave signal is a low frequency square wave signal; the pulse width The output end of the controller 1022 is connected to the input end of the inverter 1023. The pulse width controller 1022 is used to control the pulse width of the first square wave signal to divide it into two square wave signals, wherein the phases of the two square wave signals are The phase difference is 180°; the output end of the inverter 1023 is connected to the input end of the FET driver 10224, and the inverter 1023 is used to invert the amplitude of the two square wave signals; the output ends of the FET driver 1024 are respectively Connected to the control end of the first switch Q1 and the control end of the second switch Q2, the field effect transistor driver 1024 is used to invert the amplitudes of the two square wave signals input by the inverter 1023 and increase the amplitude of the two square wave signals. The amplitude of the square wave signal is used to output the two square wave signals as dual pulse waves.

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) with a period of 60HZ, a pulse width of 8.33ms, and an amplitude of 5V through the time base integrated chip NE555. signal), and further, 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 wave signals is 0.3 ms, the amplitude is 5V, and the phase difference of the two square wave signals is 180°. Then, the inverter 1023 inverts the amplitude of the two square wave signals (that is, the amplitude of 5V becomes 0V, and the amplitude of 0V becomes 5V), and the field effect transistor driver 1024 inverts the amplitude of the two square wave signals input by the inverter 1023, and increases the amplitude of the two square wave signals (for example, converts the amplitude of the square wave signal from 5V to is 14V) to output the two square wave signals as dual pulse waves.

Optionally, in some embodiments of the present invention, the frequency of the dual-channel pulse wave is 60HZ, the amplitude is 14V, and the phase difference is 180°.

It can be understood that in this embodiment of the present invention, the state switching of the first switching transistor Q1 and the second switching transistor Q2 is realized by utilizing dual-channel pulse wave output, thereby achieving low-frequency boosting of the low-frequency high-voltage transformer 20 control.

Specifically, in the above-mentioned embodiment of the present invention, compared to the ozone generating device solution using a high-frequency and high-voltage transformer, the low-frequency and high-voltage transformer 20 in the embodiment of the present invention uses low-frequency boost technology to achieve lower electrical interference. The power is smaller. At the same time, due to the use of low-frequency pulse width control technology, the energy output by the high-voltage board 10 to the low-frequency high-voltage transformer 20 is fixed, that is, the capacity of a capacitor, and the energy is input to the low-frequency high-voltage transformer 20 in a fixed period and a fixed pulse width. Therefore, , the low-frequency high-voltage transformer 20 generates a fixed high-voltage amplitude each time, a fixed period and a fixed pulse width, and the generated ozone concentration is very stable.

Further, in some embodiments of the present invention, as shown in Figure 5, the high-voltage discharge tube 30 includes a hollow glass tube with air inlets and air outlets 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 air inlet and the air outlet are connected to the cavity respectively, the inner surface of the inner glass tube is coated with a conductive material to serve as the first electrode, and the outer surface of the outer glass tube It is coated with conductive material as the second electrode, and the hollow glass tube is sealed with sealing material.

For example, in the above embodiment of the present invention, as shown in FIG. 5 , the high-voltage discharge tube 30 can be formed by connecting a wire to a conductive material (for example, silver paste) on the outer surface of the outer glass tube. The first electrode, and the second electrode of the high-voltage discharge tube 30 is 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 (for example, 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 joints, so that the high-voltage discharge tube 30 can perform high-voltage discharge through the first electrode and the second electrode.

It can be understood that in this embodiment of the present invention, compared to the solution of a high-voltage discharge tube using tungsten wire and a glass tube, the high-voltage discharge tube 30 of the embodiment of the present invention has a double-layer glass tube structure, wherein the inner The layer glass tube is connected to the outer glass tube to form a cavity, and the air inlet and outlet are connected to the cavity respectively. At the same time, the hollow glass tube is sealed with a sealing material, so there is no problem of electrode oxidation. At the same time, the high-voltage discharge tube 30 is used as a low-frequency The load of the high-voltage transformer 20, because the cavity distance between the double-layer glass tube structure is large and the cavity is not easily blocked, the water vapor will not short-circuit the first electrode and the second electrode, allowing the high-voltage discharge tube 30 and the low-frequency high-voltage transformer 20 to work Stable and conducive to extending the service life of the high-voltage discharge tube 30 and the low-frequency high-voltage transformer 20 .

Further, in some embodiments of the present invention, the low-frequency and high-voltage transformer 20 is shielded by an aluminum shell and sealed with glue, and the output end of the low-frequency and high-voltage transformer 20 is connected to the first electrode and the third electrode of the high-voltage discharge tube 30 using a fully sealed banana joint. The two electrodes are connected.

It can be understood that since the low-frequency high-voltage transformer 20 in the embodiment of the present invention achieves a thousand-fold increase in voltage, for high-voltage safety protection, in the embodiment of the present invention, the low-frequency high-voltage transformer 20 can be shielded and filled with an aluminum shell. Sealed with glue, and the output end 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 using a fully sealed banana connector, so that compared to the wired high-voltage connection solution, the high-voltage wire-free connection is safer. Better.

In summary, according to the ozone generating device according to the embodiment of the present invention, the high-voltage plate is used to output the driving signal to control the low-frequency high-voltage transformer to perform low-frequency voltage boosting work, and then the low-frequency high-voltage transformer is used to provide the low-frequency boosted DC voltage to the high-voltage discharge tube. And, use a high-voltage discharge tube to break down the air through electrodes to generate ozone. Therefore, by using low-frequency boost technology, the high-voltage generated by the low-frequency high-voltage transformer has a fixed amplitude, a fixed period, and a fixed pulse width, thereby ensuring a stable ozone concentration, effectively avoiding high-frequency electrical interference, and extending the life of the ozone generating device.

Figure 6 is a block schematic diagram of a nitrogen oxide analyzer according to an embodiment of the present invention.

Specifically, in some embodiments of the present invention, as shown in FIG. 6 , the nitrogen oxide analyzer 1000 includes the ozone generating device 100 of the above-mentioned embodiment of the present invention.

It should be noted that the specific implementation of the nitrogen oxide analyzer 1000 according to the embodiment of the present invention can be referred to the aforementioned specific implementation of the ozone generating device according to the embodiment of the present invention. To reduce redundancy, details will not be described again here.

In summary, according to the nitrogen oxide analyzer according to the embodiment of the present invention, the aforementioned ozone generating device is used, and the low-frequency voltage boosting technology is used to make the high voltage generated by the low-frequency high-voltage transformer have a fixed amplitude, a fixed period and a fixed pulse width, thereby ensuring the generation of ozone. The concentration is stable, and it effectively avoids high-frequency electrical interference, extending the life of the ozone generating device.

It should be understood that in the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" is intended to be described in connection with the embodiment or example. The specific features, structures, materials, or characteristics of are included in at least one embodiment or example of the invention. In this specification, schematic representations 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 any one or more embodiments or examples.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the referred devices or components. Must have a specific orientation, be constructed and operate in a specific orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified restrictions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present invention. Those of ordinary skill in the art can make modifications to the above-mentioned embodiments within the scope of the present invention. The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. An ozone generating device, characterized in that the device comprises: a high voltage board, a low frequency high voltage transformer and a high voltage discharge tube;

the input end of the high-voltage board is connected with the switching power supply, the output end of the high-voltage board is connected with the input end of the low-frequency high-voltage transformer, and the high-voltage board is used for outputting a driving signal to control the low-frequency high-voltage transformer to perform low-frequency boosting operation;

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 low-frequency boosted direct current voltage for the high-voltage discharge tube, wherein a secondary winding of the low-frequency high-voltage transformer adopts a two-stage boosting mode;

the high voltage discharge tube is used to break down air through the electrodes to produce ozone.

2. The ozone generating device of claim 1, wherein the high pressure plate comprises: the DC voltage output unit, the first capacitor, the second capacitor, the first switch tube, the second switch tube and the control output unit, wherein,

the input end of the direct-current voltage output unit is connected with the switching power supply;

one end of the first capacitor is connected with the output end of the direct-current voltage output unit, and the other end of the first capacitor is grounded;

the input end of the first switching tube is connected with the output end of the direct-current voltage output unit, the output end of the first switching tube is connected with the input end of the low-frequency high-voltage transformer, and the control end of the first switching tube is connected with the control output unit;

one end of the second capacitor is connected with the input end of the low-frequency high-voltage transformer, and the other end of the second capacitor is grounded;

the input end of the second switching tube is connected with the output end of the first switching tube, the output end of the second switching tube is grounded, and the control end of the second switching tube is connected with the control output unit.

3. The ozone generating device according to claim 2, wherein the high voltage board is specifically configured to output a first driving signal through the control output unit to control the first switching tube to be turned on and control the second switching tube to be turned off, so that the direct current voltage output unit charges the second capacitor through the low frequency high voltage transformer and the first switching tube.

4. The ozone generating device according to claim 3, wherein the high voltage board is further configured to output a second driving signal through the control output unit to control the second switching tube to be turned on and control the first switching tube to be turned off, so that the second capacitor is discharged through the low frequency high voltage transformer and the second switching tube.

5. The ozone generator according to claim 4, wherein 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 boosting is 14KV.

6. The ozone generating device according to claim 2, wherein the control output unit comprises a square wave generator, a pulse width controller, an inverter, and a field effect transistor driver, wherein,

the output end of the square wave generator is connected with the input end of the pulse width controller, and the square wave generator is used for generating a first square wave signal, wherein the first square wave signal is a low-frequency square wave signal;

the output end of the pulse width controller is connected with the input end of the inverter, and the pulse width controller is used for performing pulse width control on the first square wave signal to divide the first square wave signal into two paths of square wave signals, wherein the two paths of square wave signals are 180 degrees different in phase;

the output end of the inverter is connected with the input end of the field effect transistor driver, and the inverter is used for inverting the amplitude values of the two paths of square wave signals;

the output end of the field effect transistor driver is respectively connected with the control end of the first switching tube and the control end of the second switching tube, and the field effect transistor driver is used for inverting the amplitude of the two paths of square wave signals input by the inverter and improving the amplitude of the two paths of square wave signals so as to output the two paths of square wave signals as two paths of pulse waves.

7. The ozone generating device of claim 6, wherein the two-way pulse wave has a frequency of 60HZ, an amplitude of 14V, and a phase difference of 180 °.

8. The ozone generating device according to claim 1, wherein the high-voltage discharge tube comprises a hollow glass tube provided with an air inlet and an air outlet at both ends, the hollow glass tube comprises an inner glass tube and an outer glass tube, the inner glass tube is connected with the outer glass tube to form a cavity, the air inlet and the air outlet are respectively connected with the cavity, the inner surface of the inner glass tube is coated with a conductive material to serve as a first electrode, the outer surface of the outer glass tube is coated with a conductive material to serve as a second electrode, and the hollow glass tube is externally sealed with a sealing material.

9. The ozone generating device of claim 8, wherein the low frequency high voltage transformer is shielded and sealed with an aluminum housing, and an output end of the low frequency high voltage transformer is connected with the first electrode and the second electrode of the high voltage discharge tube with fully sealed banana joints.

10. A nitrogen oxide analyzer, characterized in that the nitrogen oxide analyzer comprises an ozone generating device according to any one of claims 1-9.