Air nozzle structure, discharge intensity self-adjusting method and static elimination equipment

Abstract

The invention provides a tuyere structure, a discharge intensity self-adjusting method and static electricity elimination equipment, the tuyere structure comprises a supporting structure with a built-in hollow area, an ionization needle and a discharge intensity self-adjusting assembly, the ionization needle is located in the hollow area, the supporting structure comprises a gas supply hole and an ion detection plate, and the discharge intensity self-adjusting assembly is located in the gas supply hole. The ionization needle generates a charged particle flow according to the first discharge intensity value, and the ion detection plate is located on a circulation path of the charged particle flow, senses positive ions and negative ions in the charged particle flow and converts the positive ions and the negative ions into positive ion current and negative ion current; the discharge intensity self-adjusting assembly obtains a positive ion concentration value and a negative ion concentration value according to the positive ion current and the negative ion current, obtains a current ion balance degree value according to the positive ion concentration value and the negative ion concentration value, and adjusts a second discharge intensity value input into the ionization needle according to the current ion balance degree value. Concentrations of positive ions and negative ions in the charged particle flow can be ensured to be consistent.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of static electricity elimination, in particular to a nozzle structure, a discharge intensity self-adjusting method and a static electricity elimination device. BACKGROUND

[0002] The ion wind rod is a kind of fixed static electricity elimination special equipment, which belongs to a kind of rod type static electricity elimination product.It has the characteristics of simple installation, safe and stable operation, and fast static electricity elimination speed.It is mainly applied in the fields of electronics, semiconductors, pharmaceuticals, food processing, medical treatment, cosmetics, textiles, printing, coating and the like.

[0003] As shown in Figure 1 The existing ion wind rod includes a high-voltage generator 1, a controller 2, a plurality of nozzle assemblies 7 and an ion detection plate 6, wherein the ion detection plate 6 is located adjacent to the air outlet end of each nozzle assembly 7, so that the charged particle flow circulating through the nozzle assembly 7 passes through the ion detection plate 6, thereby obtaining the current ion balance value through the ion detection plate 6, and inputting the current ion balance value into the controller 2.

[0004] However, in long-term use or in the face of complex working conditions, due to the individual processing differences of each nozzle assembly, uneven distribution of air flow, different degrees of ionization needle wear and other factors, under the same input high-voltage condition, the ion concentration and positive and negative ion balance of each nozzle assembly are inconsistent and difficult to maintain stable. This ion output imbalance will directly lead to uneven static neutralization effect in the working area below the equipment, forming a "blind area" or "hot spot" of local static residual or excessive ionization.

[0005] Therefore, how to ensure that the ion concentration output by each nozzle assembly and the ion balance are consistent is a problem to be solved at present. SUMMARY

[0006] In view of the above problems, the present application provides a nozzle structure, a discharge intensity self-adjusting method and a static electricity elimination device which can ensure that the concentrations of positive ions and negative ions in the charged particle flow are consistent.

[0007] To achieve the above-mentioned purpose, in a first aspect, the present application provides a nozzle structure, comprising: a support structure with a hollow region, an ionization needle and a discharge intensity self-adjusting assembly, wherein:

[0008] The support structure includes a gas supply hole and an ion detection plate, wherein the ionization needle generates a charged particle flow according to a first discharge intensity value, the ion detection plate is located on the flow path of the charged particle flow, senses the positive ions and negative ions in the charged particle flow, and converts the positive ions and negative ions into positive ion current and negative ion current;

[0009] The discharge intensity self-adjusting assembly derives positive ion concentration values and negative ion concentration values from the positive ion current and the negative ion current, derives a current ion balance degree value from the positive ion concentration values and the negative ion concentration values, and adjusts a second discharge intensity value input into the ionization needle according to the current ion balance degree value.

[0010] In one of the embodiments, when the ion detection plate is located at a position below the ionization needle, the ion detection plate is fixed on the outside of the inner wall surface of the support structure, or the ion detection plate is embedded in the inner wall surface of the support structure, or the ion detection plate is fixed on the bottom end surface of the support structure, wherein:

[0011] When the ion detection plate is fixed on the bottom end surface of the support structure, in the orthographic view, the ion detection plate is located on both sides of the ionization needle.

[0012] In one of the embodiments, the discharge intensity self-adjusting assembly comprises a discharge intensity adjusting unit, a current detection unit, and an MCU, the ion detection plate is connected to the current detection unit, the current detection unit is connected to the MCU and the discharge intensity adjusting unit in sequence, wherein:

[0013] The current detection unit converts the positive ion current and the negative ion current into positive ion digital signals and negative ion digital signals respectively;

[0014] After the MCU derives positive ion concentration values and negative ion concentration values from the positive ion digital signals and the negative ion digital signals respectively, the MCU derives a current ion balance degree value of the positive ion concentration values and the negative ion concentration values, and adjusts a second discharge intensity value input into the ionization needle according to the current ion balance degree value.

[0015] In one of the embodiments, the discharge intensity adjusting unit comprises a program-controlled resistor and a grounding resistor connected in sequence, wherein the ionization needle is connected to the program-controlled resistor and the grounding resistor through a circuit;

[0016] When an alternating positive and negative voltage is input into the inside of the program-controlled resistor, a first discharge intensity value input into the ionization needle is derived after adjustment;

[0017] When the current ion balance degree value is input into the program-controlled resistor, a second discharge intensity value input into the ionization needle is derived after adjustment.

[0018] In one of the embodiments, when the MCU determines that the current ion balance degree value is greater than a specified ion balance degree value for a plurality of times in succession, the MCU implements PID interpolation compensation.

[0019] In a second aspect, the present application provides a discharge intensity self-adjusting method applied to the above-mentioned nozzle structure, comprising the following steps:

[0020] The discharge intensity self-adjusting component obtains a first discharge intensity value according to the input alternating positive and negative voltage, and the ionization needle performs corona discharge on the injected gas according to the first discharge intensity value to generate a charged particle flow;

[0021] After sensing positive ions and negative ions in the charged particle flow, a positive ion concentration value and a negative ion concentration value are obtained;

[0022] After obtaining a current ion balance degree value according to the positive ion concentration value and the negative ion concentration value, a second discharge intensity value input to the ionization needle is adjusted according to the current ion balance degree value.

[0023] In one embodiment, in the step of obtaining a positive ion concentration value and a negative ion concentration value after sensing positive ions and negative ions in the charged particle flow, the following steps are included:

[0024] When the ionization needle releases the charged particle flow, positive ions in the charged particle flow are sensed, and the positive ions are converted into a positive ion current;

[0025] When the ionization needle releases the charged particle flow, negative ions in the charged particle flow are sensed, and the negative ions are converted into a negative ion current;

[0026] The positive ion current and the negative ion current are respectively converted into a positive ion digital signal and a negative ion digital signal;

[0027] A positive ion concentration value and a negative ion concentration value are respectively obtained according to the positive ion digital signal and the negative ion digital signal.

[0028] In one embodiment, in the step of adjusting a second discharge intensity value input to the ionization needle according to the current ion balance degree value after obtaining a current ion balance degree value according to the positive ion concentration value and the negative ion concentration value, the following steps are included:

[0029] A current ion balance degree value is obtained according to the positive ion concentration value and the negative ion concentration value;

[0030] The current ion balance degree value is compared with a specified ion balance degree value, and a second discharge intensity value input to the ionization needle is adjusted according to the comparison result.

[0031] In one embodiment, in the step of comparing the current ion balance degree value with the specified ion balance degree value, the following steps are included:

[0032] When it is determined that the current ion balance value is greater than the specified ion balance value for several times in succession, PID interpolation compensation is implemented.

[0033] In a third aspect, the present application further provides an electrostatic elimination device, comprising an ion wind rod, a gas generator and a host computer, wherein:

[0034] The ion wind rod comprises a shell, a controller, a high-voltage generator and a plurality of the above-mentioned nozzle structures, wherein the controller, the high-voltage generator and part of the plurality of nozzle structures are placed in the shell, the nozzle structures are respectively connected with the controller and the high-voltage generator, the controller is connected with the high-voltage generator, the controller drives the high-voltage generator to output alternating positive and negative voltages, and the high-voltage generator inputs a voltage signal corresponding to the alternating positive and negative voltages to the controller;

[0035] The gas generator injects gas into the inside of the nozzle structure through a gas pipeline;

[0036] The host computer is connected with the controller and receives the current ion balance value of each nozzle structure.

[0037] Compared with the prior art, the present application has one of the following advantages:

[0038] By additionally arranging the ion detection plate and the discharge intensity self-adjusting assembly on the nozzle structure, the current ion balance value can be obtained according to the positive ion concentration value and the negative ion concentration value in the charged particle flow, and after comparing the current ion balance value with the specified ion balance value, the second discharge intensity of the ionizing needle is adjusted according to the comparison result, so as to ensure that the concentrations of the positive ions and the negative ions in the charged particle flow are consistent;

[0039] The current ion balance value is obtained by the discharge intensity self-adjusting assembly in the nozzle structure, which can reduce the operation efficiency of the controller;

[0040] After the nozzle structure obtains the current ion balance value, the nozzle structure is further connected with the controller and the host computer, so that the host computer can know the ion balance value of each nozzle structure in real time. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the prior art ion wind rod;

[0042] Figure 2 It is a first embodiment schematic diagram of the nozzle structure in the present application;

[0043] Figure 3 It is a principle block diagram of the discharge intensity self-adjusting assembly in the present application; Figure 2

[0044] Figure 4 ​This is a schematic diagram of a second embodiment of the air nozzle structure of the present invention;

[0045] Figure 5 This is a schematic diagram of a third embodiment of the air nozzle structure of the present invention;

[0046] Figure 6 Schematic diagram of the structure of the ion wind rod in the present invention;

[0047] Figure 7 for Figure 6 Principle block diagram of the medium ion wind wand;

[0048] Figure 8 Schematic diagram of the structure of the static elimination device of the present invention;

[0049] Figure 9 for Figure 8 Principle block diagram of the static elimination device;

[0050] Figure 10 Flowchart of the discharge intensity self-adjustment method of the present invention;

[0051] Figure 11 This is a flow chart of an embodiment of the discharge intensity self-adjustment method of the present invention.

[0052] The main reference numerals are as follows:

[0053] 1-high voltage generator; 101-voltage bus; 2-controller; 3-support structure; 301-gas supply hole;

[0054] 4-Ionization needle; 5-Discharge intensity self-adjusting component; 501-Current detection unit; 5010-Transimpedance amplifier; 5011-Second-order RC low-pass filter; 5012-Integrator; 502-MCU; 503-Discharge intensity adjustment unit; 5031-Programmable resistor; 5032-Grounding resistor; 6-Ion detection board; 7-Nozzle structure; 8-Gas generator; 9-Upper computer. DETAILED DESCRIPTION

[0055] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0056] In the description of the present application, it should be understood that the terms "upper", "lower", "top surface", "bottom surface", "interior" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0057] Embodiment one

[0058] As Figure 2 With Figure 3 As shown in the drawings, the present embodiment provides a tuyere structure, including a support structure 3 with a hollow region built-in, an ionization needle 4 and a discharge intensity self-adjusting assembly 5.

[0059] Specifically, the support structure 3 is a hollow columnar structure with an open bottom, including a gas supply hole 301 formed on the columnar structure, and an ion detection plate 6 fixed on the columnar structure. Among them, the gas supply hole 301 is formed on the side wall surface of the support structure 3, and the back end surface thereof is in communication with the hollow region in the support structure 3, so that the gas can be continuously injected into the hollow region through the gas supply hole 301.

[0060] Further, the top of the ionization needle 4 penetrates and is fixed on the top end surface of the support structure 3, and the bottom end of the ionization needle 4 is located in the hollow region and faces the outside of the support structure 3, so that the generated charged particle flow can flow out to the outside of the support structure 3 through the bottom end opening.

[0061] Further, the ion detection plate 6 is located on the flow path of the charged particle flow to sense the positive ions and negative ions in the charged particle flow and convert the positive ions and negative ions into positive ion current and negative ion current.

[0062] Further, the ion detection plate 6 is a ring structure, fixed on the bottom end surface of the support structure 3 and connected with the balance control unit 5. In the front projection view, the ion detection plate 6 is sleeved on the outside of the ionization needle 4. When the charged particle flow flows out to the outside of the support structure 3, it passes through the ion detection plate 6 and contacts the ion detection plate 6 to respectively sense the positive ions and negative ions in the charged particle flow.

[0063] Further, the discharge intensity self-adjusting assembly 5 obtains the current ion balance value according to the positive ion current and the negative ion current, compares the current ion balance value with the specified ion balance value, and adjusts the first discharge intensity of the ionization needle 4 according to the comparison result.

[0064] Further, the discharge intensity self-adjusting assembly 5 comprises a discharge intensity adjusting unit 503, a current detecting unit 501 and an MCU 502, the ion detecting plate 6 is connected with the current detecting unit 501, the current detecting unit 501 is connected with the MCU 502 and the discharge intensity adjusting unit 503 in sequence, and the discharge intensity adjusting unit 503 is connected with the ionizing needle 4.

[0065] When the gas is injected into the inside of the hollow area through the gas supply hole 301, the discharge intensity adjusting unit 503 generates and releases the charged particle flow by the ionizing needle 4 performing corona discharge after receiving the input alternating positive and negative voltage. Since the ion detecting plate 6 is fixed on the bottom end face of the support structure 3, when the charged particle flow passes through the ion detecting plate 6, the ion detecting plate 6 senses the positive ions in the charged particle flow and converts the positive ions into positive ion current, and senses the negative ions in the charged particle flow and converts the negative ions into negative ion current.

[0066] The discharge intensity adjusting unit 503 comprises a program-controlled resistance 5031 and a grounding resistance 5032 connected with each other, wherein the ionizing needle 4 is connected with the connection line between the program-controlled resistance 5031 and the grounding resistance 5032. After the positive voltage and the negative voltage are input into the inside of the program-controlled resistance 5031 in an alternating manner, the MCU 502 adjusts the program-controlled resistance 5031 and the grounding resistance 5032, so as to obtain the voltage value (i.e., the current positive voltage discharge intensity or the current negative voltage discharge intensity) between the program-controlled resistance 5031 and the grounding resistance 5032, and input into the ionizing needle 4.

[0067] When the positive voltage and the negative voltage are input into the discharge intensity adjusting unit 503 in an alternating manner, the current positive voltage discharge intensity and the current negative voltage discharge intensity are obtained respectively, the ionizing needle 4 performs corona discharge on the injected gas according to the input current positive voltage discharge intensity, so as to generate the corresponding positive ion charged particle flow. The ionizing needle 4 performs corona discharge on the injected gas according to the input current negative voltage discharge intensity, so as to generate the corresponding negative ion charged particle flow.

[0068] When the positive voltage is input into the discharge intensity adjusting unit 503, the first positive voltage discharge intensity is obtained by the following steps:

[0069] When the positive voltage value input into the discharge intensity adjusting unit 503 is obtained, the input positive voltage value is defined as V

[0070] After the resistance value sum (i.e., R ) of the program-controlled resistance 5031 and the grounding resistance 5032 is obtained according to the Ohm's law, the corresponding positive current value (i.e., I + ) is obtained according to the resistance value sum and the positive voltage value by the following formula:

[0071]

[0072] wherein I + is a positive current value, is an input positive voltage value, is a sum of resistance values;

[0073] The positive voltage value across the programmed resistance (i.e., V ) is obtained using the following equation:

[0074]

[0075] wherein V is the voltage value across the programmed resistance, I + is a positive current value, is the resistance value of the programmed resistance;

[0076] The positive voltage difference between the programmed resistance 5031 and the grounded resistance 5032 (i.e., V ) is obtained using the following equation:

[0077]

[0078] wherein V is the positive voltage difference (i.e., the first positive voltage discharge intensity), is the positive voltage value across the programmed resistance, is the positive voltage value across the grounded resistance.

[0079] When the negative voltage is inputted into the discharge intensity adjustment unit 503, the first negative voltage discharge intensity is obtained using the following steps:

[0080] When the negative voltage value inputted into the discharge intensity adjustment unit 503 is obtained, the inputted negative voltage value is defined as V

[0081] After obtaining the sum of resistance values (i.e., R ) of the programmed resistance 5031 and the grounded resistance 5032 according to Ohm's law, the corresponding negative current value (i.e., I - ) is obtained using the following equation according to the sum of resistance values and the negative voltage value:

[0082]

[0083] wherein I - is a negative current value, is an input negative voltage value, is a sum of resistance values;

[0084] The negative voltage value across the programmed resistance (i.e., V ) is obtained using the following equation:

[0085]

[0086] wherein, V is the voltage value across the programmed resistance, I - I is the negative current value, R is the resistance value of the programmed resistance;

[0087] The voltage difference (i.e., V ) between the programmed resistance 5031 and the grounded resistance 5032 is obtained by using the following equation:

[0088]

[0089] wherein, V is the voltage difference (i.e., the first negative voltage discharge intensity), V is the negative voltage value across the programmed resistance, V is the negative voltage value across the grounded resistance.

[0090] The ionization needle 4 alternately generates positive ion charged particle flow and negative ion charged particle flow according to the alternately input current positive voltage discharge intensity and current negative voltage discharge intensity, and forms a charged particle flow when the positive ion charged particle flow and the negative ion charged particle flow mix inside the hollow region. Since the ion detection plate 6 is connected to the current detection unit 501, when the positive ion current and the negative ion current are input into the current detection unit 501, they are respectively converted into digitized positive ion voltage signals and negative ion voltage signals.

[0091] Preferably, the current detection unit 501 includes a trans-impedance amplifier 5010, a second-order RC low-pass filter 5011, and an integrator 5012 connected in sequence. First, the trans-impedance amplifier 5010 converts the positive ion current and the negative ion current into digitized positive ion voltage signals and negative ion voltage signals, respectively, then the positive ion voltage signals and the negative ion voltage signals are subjected to noise reduction processing by the second-order RC low-pass filter, and finally, the noise-reduced positive ion voltage signals and the noise-reduced negative ion voltage signals are subjected to charge accumulation by the integrator 5012.

[0092] After the positive ion voltage signals are input into the MCU 502, the positive ion concentration value is obtained by using the following equation:

[0093]

[0094] wherein, C + x C is the concentration value of the positive ions, E + x E is the positive ion voltage value, E0 is the zero potential value, S is the electrode slope (theoretical value z is the ion charge number), C b is the blank concentration.

[0095] After the negative ion voltage signal is input into the MCU 502, the negative ion concentration value is obtained by using the following formula:

[0096]

[0097] wherein, C - x is the concentration value of the negative ions, E - x is the voltage value of the positive and negative ions, E0 is the zero potential value, and S is the electrode slope (theoretical value z is the ion charge number), C b is the blank concentration.

[0098] After the positive ion concentration value and the negative ion concentration value are obtained respectively, the current ion balance value is obtained by using the following formula, wherein:

[0099]

[0100] After the current ion balance value is obtained, the current ion balance value is compared with the specified ion balance value, and the second discharge intensity of the ionizing needle 4 is adjusted according to the comparison result.

[0101] Further, the current ion balance value is compared with the specified ion balance value. If the current ion balance value is greater than the specified ion balance value, the second discharge intensity of the input ionizing needle is reduced according to the difference between the current ion balance value and the specified ion balance value (i.e., the next voltage value of the input ionizing needle input by the discharge intensity adjusting unit 503 is reduced). If the current ion balance value is less than the specified ion balance value, the second discharge intensity of the input ionizing needle is increased according to the difference between the current ion balance value and the specified ion balance value (i.e., the next voltage value of the input ionizing needle input by the discharge intensity adjusting unit 503 is increased). Since the resistance of the program-controlled resistor 5031 is variable and the resistance of the grounding resistor 5032 is fixed, after the MCU 502 inputs the next voltage value into the program-controlled resistor 5031, the voltage difference between the program-controlled resistor 5031 and the grounding resistor 5032 is adjusted to input into the ionizing needle 4, so that the balance value of the positive ions and the negative ions in the generated charged particle flow is consistent with the specified ion balance value.

[0102] In addition, after the current ion balance value is obtained, the MCU 502 compares the current ion balance value with the specified ion balance value in the MCU 502 to determine whether the current ion balance value is greater than the specified ion balance value. When the MCU 502 determines that the current ion balance value is greater than the specified ion balance value for a plurality of times continuously, the MCU 502 implements PID interpolation compensation.

[0103] Preferably, when the MCU 502 determines that the current ion balance value is greater than the specified ion balance value for 5 consecutive times, the MCU 502 performs PID interpolation compensation using the following formula:

[0104]

[0105] Embodiment Two

[0106] As shown in the drawings, the embodiment provides a nozzle structure, which is different from the ion wind rod of Embodiment One in that: Figure 4 The ion detection plate 6 is fixed on the inner wall surface of the support structure 3, and the outer side wall surface of the ion detection plate 6 protrudes from the inner wall surface of the support structure 3.

[0107] When the ionization needle 4 continuously generates a charged particle flow, since the ion detection plate 6 is located on the flow path of the charged particle flow, it is convenient to sense positive ions in the charged particle flow and convert the positive ions into a positive ion current and convert negative ions into a negative ion current.

[0108] Embodiment Three

[0109] As shown in the drawings, the embodiment provides a nozzle structure, which is different from the ion wind rod of Embodiment One in that:

[0110] Figure 5 The ion detection plate 6 is embedded on the inner wall surface of the support structure 3, and the outer side wall surface of the ion detection plate 6 is in the same plane as the inner wall surface of the support structure 3.

[0111] When the ionization needle 4 continuously generates a charged particle flow, since the ion detection plate 6 is located on the flow path of the charged particle flow, it is convenient to sense positive ions in the charged particle flow and convert the positive ions into a positive ion current and convert negative ions into a negative ion current.

[0112] In Embodiments One to Three, in order to increase the sensing effect of the ion detection plate on positive ions and negative ions, a fluid baffle that can shield a part of the charged particle flow is formed on the ion detection plate.

[0113] Preferably, an included angle of not more than 30° is formed between the fluid baffle and the ion detection plate. This design does not affect the flow of the charged particle flow, and can also gather a part of the charged particle flow at the connection between the fluid baffle and the ion detection plate.

[0114] More preferably, a plurality of through holes are formed on the fluid baffle. When a part of the charged particle flow contacts the fluid baffle, the part of the charged particle flow can be guided to the position of the fluid baffle through the non-through hole area to sense positive ions and negative ions in the charged particle flow.

[0115] More preferably, a plurality of through holes are formed on the fluid baffle. When a part of the charged particle flow contacts the fluid baffle, the part of the charged particle flow can be guided to the position of the fluid baffle through the non-through hole area to sense positive ions and negative ions in the charged particle flow. ​

[0116] In the above-mentioned embodiment one to embodiment three, by adding ion detection plate and discharge intensity self-adjusting assembly on the air nozzle structure, the current ion balance degree value can be obtained according to the positive ion concentration value and the negative ion concentration value in the charged particle flow, and after comparing the current ion balance degree value with the specified ion balance degree value, the second discharge intensity of the input ionizing needle is adjusted according to the comparison result, so as to ensure that the concentrations of positive ions and negative ions in the charged particle flow are consistent.

[0117] Embodiment four

[0118] As Figure 6 With Figure 7 The embodiment provides an ion wind stick, which comprises a shell and a plurality of air nozzle structures 7 described in any one of the above-mentioned embodiment one to embodiment three arranged in the interior of the shell, wherein each air nozzle structure 7 is distributed on the shell along the same axial direction.

[0119] Specifically, the controller 2 and the high-voltage generator 1 connected with each other are included in the shell, wherein the controller 2 drives the high-voltage generator 1 to output alternating positive and negative voltages.

[0120] Further, the high-voltage generator 1 completes preliminary voltage boosting according to the voltage boosting signal input by the controller 2, and the alternating output of positive and negative voltages is obtained by converting the alternating current input into the high-voltage generator 1 into positive and negative voltages through a voltage doubler rectifier circuit and a capacitor filter.

[0121] Further, the high-voltage generator 1 is a multi-channel independent control flyback converter, the controller 2 inputs a high-precision PWM waveform signal to the high-voltage generator 1, and the high-voltage generator 1 converts the PWM waveform signal into a high-frequency square wave signal through a high-speed switch to realize preliminary voltage boosting of the high-voltage generator 1. After the high-voltage alternating current is input into the high-voltage generator 1, the alternating output of positive and negative voltages is obtained by converting the high-voltage alternating current into positive and negative voltages through a voltage doubler rectifier circuit and a capacitor filter.

[0122] Exemplarily, the high-voltage generator 1 alternately outputs positive and negative voltages according to the pre-set conditions.

[0123] Further, when the high-voltage generator 1 alternately outputs positive and negative voltages, the controller 2 alternately inputs voltage signals (i.e., positive voltage signals and negative voltage signals) corresponding to the positive and negative voltages, and performs closed-loop compensation through a PID algorithm to dynamically correct the output parameters of the high-precision PWM waveform signal, so as to ensure that the alternating output of positive and negative voltages of the high-voltage generator 1 is consistent with the pre-set alternating output of positive and negative voltages.

[0124] The structure and principle of the air nozzle structure 7 are the same as those of the air nozzle structure 7 in any one of the above-mentioned embodiment one to embodiment three.

[0125] By adding ion detection plate and discharge intensity self-adjusting assembly on each nozzle structure in the ion wind rod, the current ion balance degree value can be obtained according to the positive ion concentration value and the negative ion concentration value in the charged particle flow, and after comparing the current ion balance degree value with the specified ion balance degree value, the second discharge intensity of the input ionizing needle is adjusted according to the comparison result, so as to ensure that the concentrations of positive ions and negative ions in the charged particle flow are consistent.

[0126] Embodiment five

[0127] As shown in Figure 8 With Figure 9 The embodiment provides an electrostatic eliminator, which comprises the ion wind rod described in the above embodiment four, a gas generator 8 communicated with the ion wind rod, and a host computer 9 connected with the controller 2. The gas generator 8 is communicated with the gas supply hole 301 in each nozzle structure 7 through a gas pipeline, so as to inject gas into the hollow area of each support structure 3, so that the ionizing needle 4 performs corona discharge on the gas to generate a charged particle flow.

[0128] Each nozzle structure is connected with the controller 2 and the host computer 9, and the current ion balance degree value obtained by each nozzle structure is input into the host computer 9, so that the host computer connected with the controller can know the current ion balance degree value of each nozzle structure in real time.

[0129] Embodiment six

[0130] As shown in Figure 10 The embodiment provides a discharge intensity self-adjusting method, which is applied to any one of the nozzle structures described in the above embodiments one to three, and comprises the following steps:

[0131] S100, the discharge intensity self-adjusting assembly obtains a first discharge intensity value according to the input alternating positive and negative voltage, and the ionizing needle performs corona discharge on the injected gas according to the first discharge intensity value to generate a charged particle flow.

[0132] When the gas is injected into the inside of the hollow area through the gas supply hole, the discharge intensity self-adjusting assembly obtains a current positive voltage discharge intensity and a current negative voltage discharge intensity respectively after receiving the externally input alternating positive and negative voltage, and the ionizing needle alternately generates a positive ion charged particle flow and a negative ion charged particle flow according to the alternating input current positive voltage discharge intensity and current negative voltage discharge intensity, and the positive ion charged particle flow and the negative ion charged particle flow form a charged particle flow when they are mixed in the inside of the hollow area.

[0133] S101, after sensing the positive ions and the negative ions in the charged particle flow, a positive ion concentration value and a negative ion concentration value are obtained.

[0134] Among them, first, when the charged particle flow passes through the ion detection plate, the ion detection plate respectively senses the positive ions and negative ions in the charged particle flow, and converts the positive ions and negative ions into positive ion current and negative ion current respectively; then, since the ion detection plate is connected to the current detection unit, when the positive ion current and the negative ion current are input into the current detection unit, they are converted into digital positive ion voltage signals and negative ion voltage signals respectively; finally, the positive ion voltage signal and the negative ion voltage signal are respectively used to obtain the positive ion concentration value and the negative ion concentration value using the formula recorded in Example 1.

[0135] S102 , after obtaining a current ion balance value according to the positive ion concentration value and the negative ion concentration value, adjust a second discharge intensity value input to the ionization needle according to the current ion balance value.

[0136] The positive ion concentration value and the negative ion concentration value are used to obtain the current ion balance value using the formula described in Example 1. The current ion balance value is compared with the specified ion balance value, and the second discharge intensity of the ionization needle is adjusted according to the comparison result.

[0137] Furthermore, the current ion balance value is compared with the specified ion balance value. If the current ion balance value is greater than the specified ion balance value, the second discharge intensity of the input ionization needle is reduced (i.e., the next voltage value input to the ionization needle by the discharge intensity adjustment unit is reduced) according to the difference between the current ion balance value and the specified ion balance value. If the current ion balance value is less than the specified ion balance value, the second discharge intensity of the input ionization needle is increased (i.e., the next voltage value input to the ionization needle by the discharge intensity adjustment unit is increased) according to the difference between the current ion balance value and the specified ion balance value. Since the resistance of the programmable resistor is variable and the resistance of the ground resistor is fixed, after the MCU inputs the next voltage value into the programmable resistor, it adjusts the voltage difference between the programmable resistor and the ground resistor to input into the ionization needle so that the balance value of the positive ions and negative ions in the generated charged particle flow is consistent with the specified ion balance value.

[0138] Example 7

[0139] like Figure 11 As shown, this embodiment provides a method for self-adjusting discharge intensity, which is applied to the ion wind rod described in the fifth embodiment or the static elimination device described in the sixth embodiment, and includes the following steps:

[0140] S200: The controller inputs a boost signal to the high voltage generator.

[0141] The high-voltage generator is a multi-channel independent control flyback converter, the controller inputs a high-precision PWM waveform signal to the high-voltage generator, and the high-voltage generator converts the PWM waveform signal into a high-frequency square wave signal through a high-speed switch to realize preliminary voltage boosting of the high-voltage generator.

[0142] S201, after the high-voltage generator completes preliminary voltage boosting, the alternating positive and negative voltages are converted from the alternating current.

[0143] The high-voltage generator converts the high-voltage alternating current in the high-voltage generator into alternating output positive and negative voltages through a voltage doubler rectifier circuit and a capacitor filter after completing preliminary voltage boosting according to the input voltage boosting signal of the controller.

[0144] Meanwhile, when the high-voltage generator outputs alternating positive and negative voltages, the controller alternately inputs voltage signals (i.e., positive voltage signals and negative voltage signals) corresponding to the positive and negative voltages, and performs closed-loop compensation through a PID algorithm to dynamically correct the output parameters of the high-precision PWM waveform signal, so as to ensure that the alternating positive and negative voltage values output by the high-voltage generator are consistent with the preset alternating positive and negative voltage values.

[0145] S202, the ionization needle generates a charged particle stream by corona discharge on the injected gas according to the obtained first discharge intensity value.

[0146] When the gas is injected into the inside of the hollow area through the gas supply hole, the discharge intensity self-adjusting assembly obtains the current positive voltage discharge intensity and the current negative voltage discharge intensity after receiving the alternating positive and negative voltages input from the outside, and the ionization needle alternately generates positive ion charged particle streams and negative ion charged particle streams according to the alternating input current positive voltage discharge intensity and the current negative voltage discharge intensity, and forms a charged particle stream when the positive ion charged particle streams and the negative ion charged particle streams mix in the inside of the hollow area.

[0147] S203, the positive ions and the negative ions in the charged particle stream are converted into positive ion digital signals and negative ion digital signals, respectively.

[0148] When the charged particle stream passes through the ion detection plate, the ion detection plate senses the positive ions and the negative ions in the charged particle stream and converts the positive ions and the negative ions into positive ion currents and negative ion currents, respectively. Since the ion detection plate is connected to the current detection unit, when the positive ion currents and the negative ion currents are input into the current detection unit, they are converted into digitized positive ion voltage signals and negative ion voltage signals, respectively.

[0149] S204, the positive ion concentration value and the negative ion concentration value are obtained, respectively.

[0150] Wherein, the positive ion voltage signal and the negative ion voltage signal are used to obtain the positive ion concentration value and the negative ion concentration value by the formula recorded in the embodiment one.

[0151] S205, obtaining the current ion balance value.

[0152] Wherein, the positive ion concentration value and the negative ion concentration value are used to obtain the current ion balance value by the formula recorded in the embodiment one.

[0153] S206, obtaining the second discharge intensity value according to the current ion balance.

[0154] Wherein, the current ion balance value is compared with the specified ion balance value, if the current ion balance value is greater than the specified ion balance value, the second discharge intensity of the input ionizing needle is reduced according to the difference between the current ion balance value and the specified ion balance value (i.e. the next voltage value of the discharge intensity adjusting unit input ionizing needle is reduced). If the current ion balance value is less than the specified ion balance value, the second discharge intensity of the input ionizing needle is increased according to the difference between the current ion balance value and the specified ion balance value (i.e. the next voltage value of the discharge intensity adjusting unit input ionizing needle is increased). Wherein, since the resistance of the program-controlled resistor is variable and the resistance of the grounding resistor is fixed, the MCU adjusts the voltage difference between the program-controlled resistor and the grounding resistor to make the balance value of the positive ion and the negative ion in the generated charged particle flow consistent with the specified ion balance value after inputting the next voltage value to the program-controlled resistor.

[0155] S207, judging whether the current ion balance value is continuously greater than the specified ion balance value.

[0156] Wherein, after obtaining the current ion balance value, the current ion balance value is compared with the specified ion balance value in the MCU to judge whether the current ion balance value is greater than the specified ion balance value.

[0157] S208, implementing PID interpolation compensation.

[0158] Further, when judging whether the current ion balance value is greater than the specified ion balance value, PID interpolation compensation is implemented by using the following formula:

[0159]

[0160] S209, inputting the current ion balance value into the controller.

[0161] Further, when judging that the current ion balance value is not greater than the specified ion balance value, the current ion balance value is inputted into the controller through the communication bus, so that the host computer connected with the controller can know the ion balance of each nozzle structure in real time.

[0162] The above description is only the preferred embodiment of the present application, which is only illustrative but not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalents can be made to the present application within the spirit and scope defined by the claims of the present application, and all of them will fall within the protection scope of the present application.

Claims

1. A tuyere structure, characterized by, The application relates to a support structure with a hollow region, an ionization needle and a discharge intensity self-adjusting assembly, wherein: The support structure comprises a gas supply hole and an ion detection plate, wherein the ionization needle generates a charged particle flow according to a first discharge intensity value, the ion detection plate is located on a flow path of the charged particle flow, senses positive ions and negative ions in the charged particle flow, and converts the positive ions and the negative ions into positive ion current and negative ion current; The discharge intensity self-adjusting assembly obtains positive ion concentration value and negative ion concentration value according to the positive ion current and the negative ion current, obtains current ion balance degree value according to the positive ion concentration value and the negative ion concentration value, and adjusts a second discharge intensity value input into the ionization needle according to the current ion balance degree value. When the ion detection plate is located below the ionization needle, the ion detection plate is fixed on the outside of the inner wall surface of the support structure, or the ion detection plate is embedded in the inner wall surface of the support structure, or the ion detection plate is fixed on the bottom end surface of the support structure, wherein:

2. A tuyere structure according to claim 1, characterised in that When the ion detection plate is fixed on the bottom end surface of the support structure, in an orthographic projection view, the ion detection plate is located on both sides of the ionization needle. The discharge intensity self-adjusting assembly comprises a discharge intensity adjusting unit, a current detection unit and an MCU, the ion detection plate is connected with the current detection unit, the current detection unit is connected with the MCU and the discharge intensity adjusting unit in sequence, wherein:

3. A windbox structure according to claim 2, characterised in that The current detection unit converts the positive ion current and the negative ion current into positive ion digital signal and negative ion digital signal respectively; After the MCU obtains positive ion concentration value and negative ion concentration value according to the positive ion digital signal and the negative ion digital signal respectively, the MCU obtains current ion balance degree value of the positive ion concentration value and the negative ion concentration value, and adjusts a second discharge intensity value input into the ionization needle according to the current ion balance degree value. The discharge intensity adjusting unit comprises a program-controlled resistor and a grounding resistor connected in sequence, wherein the ionization needle is connected with the program-controlled resistor and the grounding resistor through a line; 4. A windbox structure according to claim 3, characterised in that When alternating positive and negative voltage is input into the inside of the program-controlled resistor, a first discharge intensity value input into the ionization needle is obtained after adjustment; When the current ion balance degree value is input into the program-controlled resistor, a second discharge intensity value input into the ionization needle is obtained after adjustment. When the MCU determines that the current ion balance degree value is greater than a specified ion balance degree value for continuous times, the MCU implements PID interpolation compensation.

5. A tuyere structure according to any one of claims 1 to 4, characterised in that, The application comprises the following steps:

6. A method for self-adjusting discharge intensity, applied to the wind nozzle structure of any one of claims 1 to 5, characterized in that, The discharge intensity self-adjusting assembly obtains a first discharge intensity value according to input alternating positive and negative voltage, and the ionization needle generates a charged particle flow by corona discharge on injected gas according to the first discharge intensity value; After positive ions and negative ions in the charged particle flow are sensed, positive ion concentration value and negative ion concentration value are obtained; ​ After the current ion balance degree value is derived according to the positive ion concentration value and the negative ion concentration value, a second discharge intensity value input to the ionization needle is adjusted according to the current ion balance degree value.

7. The method of self-adjusting discharge strength according to claim 6, wherein, In the deriving of the positive ion concentration value and the negative ion concentration value after the positive ions and the negative ions in the charged particle flow are sensed, the following are included: When the ionization needle releases the charged particle flow, the positive ions in the charged particle flow are sensed, and the positive ions are converted into a positive ion current; When the ionization needle releases the charged particle flow, the negative ions in the charged particle flow are sensed, and the negative ions are converted into a negative ion current; The positive ion current and the negative ion current are respectively converted into a positive ion digital signal and a negative ion digital signal; The positive ion concentration value and the negative ion concentration value are respectively derived according to the positive ion digital signal and the negative ion digital signal.

8. The method of self-adjusting discharge strength according to claim 6, wherein, In the adjusting of the second discharge intensity value input to the ionization needle according to the current ion balance degree value after the current ion balance degree value is derived according to the positive ion concentration value and the negative ion concentration value, the following are included: The current ion balance degree value is derived according to the positive ion concentration value and the negative ion concentration value; The current ion balance degree value is compared with a specified ion balance degree value, and a second discharge intensity value input to the ionization needle is adjusted according to a comparison result.

9. The method of self-adjusting discharge strength according to claim 8, wherein, In the comparing of the current ion balance degree value with the specified ion balance degree value, the following are included: When it is determined that the current ion balance degree value is greater than the specified ion balance degree value for a plurality of times in succession, PID interpolation compensation is implemented.

10. An electrostatic elimination device, characterized by, The ion wind stick, the gas generator, and the upper computer are included, wherein: The ion wind stick includes a shell, a controller, a high-voltage generator, and a plurality of the nozzle structures according to any one of claims 1 to 5, wherein the controller, the high-voltage generator, and a part of the plurality of nozzle structures are placed in the shell, the nozzle structures are respectively connected with the controller and the high-voltage generator, the controller is connected with the high-voltage generator, the controller drives the high-voltage generator to output alternating positive and negative voltages, and the high-voltage generator inputs voltage signals corresponding to the alternating positive and negative voltages to the controller; The gas generator injects gas into the inside of the nozzle structure through a gas pipeline; The upper computer is connected with the controller and receives a current ion balance degree value of each nozzle structure.

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