Digital display type ion fan circuit

Abstract

The utility model discloses a digital display type ion fan circuit, and relates to the field of anti-static equipment and digital display circuits. The problem that whether an existing ion fan breaks down or not cannot be judged in real time in the using process at present is solved. The digital display type ion fan circuit comprises a step-down circuit, an alternating-current voltage anti-interference circuit, a rectifying circuit, a direct-current voltage anti-interference circuit and a voltage display device, the circuit modules are electrically connected to realize the functions of voltage reduction, filtering, anti-interference processing, rectification and the like on alternating current or direct current high-voltage input intervening in the circuit, and finally, voltage information is sampled through a voltage display device and is displayed in real time, namely, residual voltage; and when the residual voltage is displayed normally, the ion fan has no fault, and when the residual voltage is displayed abnormally, the ion fan has a fault, so that the function of judging whether the ion fan has a fault in the working process in real time is realized.

Description

Technical Field

[0001] The utility model relates to the field of anti-static equipment and digital display circuits, and in particular to a digital display type ion fan circuit. Background Art

[0002] In the fields of electronic product assembly, microelectronics manufacturing, printing, precision manufacturing, etc., the harm of static electricity cannot be underestimated. For these static sensitive component production lines, the static voltage generated may adversely affect product performance, or even damage the product or its components. Therefore, static electricity protection is an important issue in today's industrial production. For this reason, corresponding equipment for static electricity removal has emerged, and the most common of this type of equipment is the ion blower.

[0003] The existing ion blower is mainly composed of a corona discharger, a high-voltage power supply and an air supply system. It is designed and manufactured based on the principle of tip discharge and "neutralization" of positive and negative electricity. Specifically, an ion needle connected to high voltage is installed in the device. The ion needle generates tip discharge to ionize the air, generating a large amount of airflow with positive and negative charges to neutralize the charge on the object. When the surface of the object is negatively charged, it will absorb the positive charge in the airflow; when the surface of the object is positively charged, it will absorb the negative charge in the airflow, thereby neutralizing the static electricity on the surface of the object and achieving the purpose of removing static electricity. The performance and working condition of the ion blower play a decisive role in the effect of removing static electricity.

[0004] However, in the existing ion blower, there are still the following deficiencies in terms of its circuit design: the existing ion blower is often designed as a simple AC or DC working circuit, plugs in the power cord, turns on the corresponding working switch to work, and in the course of work, there is neither a high voltage indicator light indicating the working state nor a neutral voltage display (i.e., residual voltage display). If it is necessary to judge whether the ion blower is working properly or not, it is necessary to use an external ion blower tester to perform a corresponding performance test, and it is impossible to judge in real time whether the ion blower is malfunctioning during use. This operation is extremely complicated and cumbersome, affects the normal operation of the ion blower, and it is impossible to judge whether it is malfunctioning, and it is also impossible to ensure its anti-static effect, resulting in performance problems in the corresponding parts and components that are anti-statically charged. How to judge the fault of the ion blower in real time under normal working conditions has become a key problem to be solved in this field.

[0005] Therefore, it is currently necessary to provide a digital display ion blower circuit that enables the ion blower to perform real-time judgment on whether it is faulty while performing normal AC or DC operation. Utility Model Content

[0006] To solve the problems raised in the above-mentioned background art, the present utility model provides a digital display type ion blower circuit, which solves the problem that the current ion blower cannot perform real-time fault judgment during the normal operation of alternating current or direct current.

[0007] To achieve the above object, the present utility model provides the following technical solution: a digital display type ion blower circuit, which includes a step-down circuit, an AC voltage anti-interference circuit, a rectification circuit, a DC voltage anti-interference circuit, and a voltage display device;

[0008] The input end of the step-down circuit is connected to a high-voltage power supply;

[0009] The input end of the AC voltage anti-interference circuit is electrically connected to the output end of the step-down circuit, and the output end of the AC voltage anti-interference circuit is electrically connected to the input end of the rectification circuit;

[0010] The rectification circuit includes a positive voltage output end and a negative voltage output end. Among them, the positive voltage output end is electrically connected to the positive voltage input end of the DC voltage anti-interference circuit, the negative voltage output end is electrically connected to the negative voltage input end of the DC voltage anti-interference circuit, and the output end of the DC voltage anti-interference circuit is electrically connected to the sampling voltage end of the voltage display device.

[0011] Based on the above digital display type ion blower circuit, in a possible design, the step-down circuit includes a positive electrode step-down unit and a negative electrode step-down unit. The positive electrode step-down unit includes a first positive electrode step-down resistor R1 and a second positive electrode step-down resistor R4 connected in series, and the negative electrode step-down unit includes a negative electrode step-down resistor R3. The input ends of the first positive electrode step-down resistor R1 and the negative electrode step-down resistor R3 are both electrically connected to the power transmission end of the high-voltage power supply.

[0012] Based on the above digital display type ion blower circuit, in a possible design, the AC voltage anti-interference circuit includes a first filtering unit and an AC anti-high-frequency interference unit. Among them, the first filtering unit includes an AC primary filtering capacitor C1, and the AC anti-high-frequency interference unit includes a first AC anti-high-frequency interference capacitor C2 and a second AC anti-high-frequency interference capacitor C3.

[0013] The AC primary filtering capacitor C1 is electrically connected between the output end of the positive electrode step-down unit and the output end of the negative electrode step-down unit; the input end of the first AC anti-high-frequency interference capacitor C2 is electrically connected to the second positive electrode step-down resistor R4, the output end of the first AC anti-high-frequency interference capacitor C2 is electrically connected to the rectification circuit, the input end of the second AC anti-high-frequency interference capacitor C3 is electrically connected to the negative electrode step-down resistor R3, and the output end of the second AC anti-high-frequency interference capacitor C3 is electrically connected to the rectification circuit.

[0014] Based on the above digital display type ion blower circuit, in a possible design, the rectifier circuit includes a first positive voltage rectifier diode D1, a second positive voltage rectifier diode D3, a first negative voltage rectifier diode D2, and a second negative voltage rectifier diode D4;

[0015] The input end of the first positive voltage rectifier diode D1 is electrically connected to one end of the first AC anti-high frequency interference capacitor C2, the input end of the second positive voltage rectifier diode D3 is electrically connected to the other end of the first AC anti-high frequency interference capacitor C2, and the output ends of the first positive voltage rectifier diode D1 and the second positive voltage rectifier diode D3 are electrically connected to form a positive voltage rectifier output end;

[0016] The input end of the first negative voltage rectifier diode D2 is electrically connected to one end of the second AC anti-high frequency interference capacitor C3, the input end of the second negative voltage rectifier diode D4 is electrically connected to the other end of the second AC anti-high frequency interference capacitor C3, and the output ends of the first negative voltage rectifier diode D2 and the second negative voltage rectifier diode D4 are electrically connected to form a negative voltage rectifier output end.

[0017] Based on the above digital display type ion blower circuit, in a possible design, the DC voltage anti-interference circuit includes a DC anti-high frequency interference unit and a second filtering unit. Among them, the DC anti-high frequency interference unit includes a positive voltage anti-high frequency interference capacitor C4 and a negative voltage anti-high frequency interference capacitor C5, and the second filtering unit includes a positive voltage filtering capacitor C6 and a negative voltage filtering capacitor C7.

[0018] The input end of the positive voltage anti-high frequency interference capacitor C4 and the input end of the positive voltage filtering capacitor C6 are electrically connected to the positive voltage rectifier output end, the input end of the negative voltage anti-high frequency interference capacitor C5 and the input end of the negative voltage filtering capacitor C7 are electrically connected to the negative voltage rectifier output end; and both the DC anti-high frequency interference unit and the second filtering unit are connected to the positive and negative common ground.

[0019] Based on the above digital display type ion blower circuit, in a possible design, it further includes a zero-adjusting potentiometer. The positive voltage lead-out end of the zero-adjusting potentiometer is electrically connected to the positive voltage output end of the DC voltage anti-interference circuit, and the negative voltage lead-out end of the zero-adjusting potentiometer is electrically connected to the negative voltage output end of the DC voltage anti-interference circuit; the sliding contact lead-out end of the zero-adjusting potentiometer is electrically connected to the sampling voltage end of the voltage display device.

[0020] Based on the above digital display type ion blower circuit, in a possible design, a capacitor C8 and a resistor R7 are also electrically connected to the sliding contact lead-out end of the zero-adjusting potentiometer. The negative terminal of the capacitor C8 is connected to the positive and negative common ground, and the negative terminal of the resistor R7 is electrically connected to the input end of the voltage display device.

[0021] Based on the above digital display type ion blower circuit, in a possible design, it further includes a DC buck unit. The DC buck unit includes a positive voltage buck load resistor R5 and a negative voltage buck load resistor R6. One end of the positive voltage buck load resistor R5 is electrically connected to the positive voltage output terminal of the rectification circuit, and one end of the negative voltage buck load resistor R6 is electrically connected to the negative voltage output terminal of the rectification circuit. The other ends of the positive voltage buck load resistor R5 and the negative voltage buck load resistor R6 are both connected to the positive and negative common ground.

[0022] Based on the above digital display type ion blower circuit, in a possible design, the output terminal of the voltage display device is connected to the positive and negative common ground through a common buck resistor R2.

[0023] Based on the above digital display type ion blower circuit, in a possible design, the positive and negative common ground is set as a center tap led out from the high voltage output terminal of the high voltage power supply.

[0024] Beneficial effects:

[0025] The digital display type ion blower circuit disclosed by the present utility model includes a buck circuit, an AC voltage anti-interference circuit, a rectification circuit, a DC voltage anti-interference circuit, and a voltage display device. When processing an AC high voltage input, through the AC voltage anti-interference processing of the AC voltage anti-interference circuit, the clutter and high-frequency interference in the AC signal are excluded to form a stable AC voltage, and then positive and negative voltage rectification is performed through the rectification circuit to form positive and negative voltage inputs in DC form (no prior AC processing and rectification is performed when processing a DC high voltage input). The positive and negative voltage inputs in DC form are subjected to DC voltage anti-interference processing to exclude the clutter and high-frequency interference in the DC signal, form a stable DC voltage, and are sampled through the voltage sampling circuit in the voltage display device to obtain an accurate residual voltage value, and the residual voltage is displayed in the display module. The change in the residual voltage value on the voltage display device can reflect the working state of the ion blower. When the residual voltage display value on the voltage display device is within the normal working range, it can be determined that the ion blower is performing normal static elimination work. When the residual voltage display value on the voltage display device exceeds the normal working range, it can be determined that the ion blower is in an abnormal working state, that is, a working fault has occurred. At this time, the operation of the ion blower can be immediately terminated to avoid affecting its static elimination effect. Description of the drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic diagram of the control circuit of a traditional AC ion blower;

[0028] Figure 2 It is a schematic diagram of the control circuit of a traditional DC ion blower;

[0029] Figure 3 It is a schematic diagram of the digital display ion blower circuit of the AC ion blower in the embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the digital display part circuit of the digital display ion blower in the embodiment of the present invention. Detailed implementation manners

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the accompanying drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings. It should be noted here that the description of these embodiment manners is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0032] It should be understood that although terms such as first and second may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, the first unit can be called the second unit, and similarly, the second unit can be called the first unit, without departing from the scope of the embodiments of the present invention.

[0033] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, those of ordinary skill in the art should understand that the exemplary embodiments can be implemented without these specific details. For example, a system can be shown in a block diagram to avoid obscuring the example with unnecessary details. In other embodiments, well-known processes, structures, and technologies can be shown without unnecessary details to avoid obscuring the embodiments.

[0034] Embodiment 1:

[0035] As Figures 1-4As shown in the figure, this embodiment provides a digital display type ion blower circuit, which is connected to a high-voltage input circuit and an ion blower for operation. Among them, it includes a step-down circuit, an AC voltage anti-interference circuit, a rectification circuit, a DC voltage anti-interference circuit, and a voltage display device. When the connected high-voltage input circuit is an AC high-voltage input, the step-down circuit works first, using impedance step-down to divide and step down the input AC high voltage. The stepped-down AC voltage is then subjected to AC voltage anti-interference processing through the AC voltage anti-interference circuit. Its purpose is to filter out the excess clutter in the voltage signal in the AC form and eliminate the high-frequency interference generated by the operation of the high-voltage coupling transformer, forming a stable AC voltage. The stable AC voltage in AC form is input into the rectification circuit for positive and negative voltage rectification of AC to DC, and positive and negative voltages in DC form can be formed for input (no prior AC processing and rectification are performed when dealing with DC high-voltage input). The positive and negative voltages in DC form formed after rectification are respectively input into the positive voltage input terminal and the negative voltage input terminal of the DC voltage anti-interference circuit for positive and negative DC voltage anti-interference processing, eliminating the clutter and high-frequency interference in the DC signal, and a stable DC voltage can be obtained. Sampling is performed through the voltage sampling circuit in the voltage display device (which can be called high-voltage sampling) to obtain an accurate residual voltage value, and the residual voltage is displayed in the display module.

[0036] Comparison Figure 1 、 Figure 2 The traditional ion blower circuit shown in Figure 3 、 Figure 4 and the digital display type ion blower circuit in this embodiment shown in Figure 1 is the control circuit of the traditional AC ion blower, directly inputting 5.6 Kv of AC high voltage into the AC ion blower; Figure 2 is the control circuit of the traditional DC ion blower, directly inputting 4.6 Kv of DC high voltage into the DC ion blower. It can be seen that for this digital display type ion blower circuit provided in this embodiment, there is no need to modify the high-voltage input part circuit of the traditional ion blower. Only by adding a digital display part circuit as shown in Figure 4 can the function of residual voltage display be realized. Specifically, a digital display part circuit is newly connected to the traditional AC high-voltage input circuit as shown in Figure 1 to form a digital display type ion blower circuit of the AC ion blower as shown in Figure 3 (the digital display type ion blower circuit of the DC ion blower is a digital display part circuit as shown in Figure 2 newly connected to the traditional DC high-voltage input circuit as shown in Figure 4 ). It can fully realize the function of monitoring the working state of the ion blower when the ion blower is in a normal working state. If a fault occurs, it can be immediately displayed through the voltage display device.

[0037] Embodiment 2:

[0038] As Figures 1-4 shown, this embodiment provides a digital display type ion blower circuit. As a specific implementation manner, when a DC high voltage input as shown in Figure 4 is adopted, the input end of the buck circuit in this embodiment is connected with a positive high voltage and a negative high voltage. The buck circuit is used to perform impedance bucking on the input positive high voltage and negative high voltage to prepare for subsequent capacitor filtering, high voltage filtering, and high voltage sampling; when an AC input as shown in Figure 3 is adopted, the polarity of the high voltage input is not distinguished.

[0039] The AC voltage anti-interference circuit includes a first filtering unit and an AC anti-high frequency interference unit. Among them, the first filtering unit includes an AC primary filtering capacitor C1, which is used to perform AC filtering on the bucked AC voltage; the AC anti-high frequency interference unit includes a first AC anti-high frequency interference capacitor C2 and a second AC anti-high frequency interference capacitor C3. The AC voltage after AC filtering is input into the AC anti-high frequency interference unit for anti-high frequency interference processing, which is used to resist the high frequency conduction interference generated by the high voltage coupling transformer.

[0040] The design of the DC voltage anti-interference circuit in this embodiment is the same as that of the AC voltage anti-interference circuit, including a DC anti-high frequency interference unit and a second filtering unit. The DC anti-high frequency interference unit includes a positive voltage anti-high frequency interference capacitor C4 and a negative voltage anti-high frequency interference capacitor C5. The second filtering unit includes a positive voltage filtering capacitor C6 and a negative voltage filtering capacitor C7, which respectively perform DC filtering and anti-interference processing on the positive and negative voltages after rectification. The positive voltage anti-high frequency interference capacitor C4 and the positive voltage filtering capacitor C6 are connected to each other to form a positive voltage rectification input end, and the negative voltage anti-high frequency interference capacitor C5 and the negative voltage filtering capacitor C7 are connected to each other to form a negative voltage rectification input end.

[0041] Connect the above positive voltage rectification input end and negative voltage rectification input end to the positive voltage lead-out end and negative voltage lead-out end of the zero-adjusting potentiometer in this embodiment respectively, and electrically connect them to the input end of the voltage display device through the sliding contact lead-out end of the zero-adjusting potentiometer. Connect the signal output port of the voltage display device to a positive and negative voltage common ground, and the display of positive and negative voltages, that is, the display of the residual voltage, can be obtained; since the circuit design in this embodiment is fixed and the input of positive and negative high voltages also remains constant during actual operation, when the ion blower is working normally, the residual voltage display value of the voltage display device is within the normal working range. When the ion blower fails, the residual voltage display value of the voltage display device will also exceed the normal working range. At this time, just end the operation of the ion blower immediately to avoid affecting the static elimination effect of the ion blower on the workpiece to be processed.

[0042] The digital display type ion blower circuit provided by this embodiment can work when connected to AC high voltage and DC high voltage. When connected to AC high voltage, as Figure 3 shown, the high voltage coupling transformer inputs AC high voltage to this circuit. This circuit uses the first positive pole step-down resistor R1, the second positive pole step-down resistor R4, and the negative pole step-down resistor R3 to perform impedance step-down on the input AC high voltage. The stepped-down AC voltage is subjected to AC filtering through the AC primary filtering capacitor C1. After filtering, it is then subjected to AC voltage high-frequency interference resistance treatment through the first AC high-frequency interference resistance capacitor C2 and the second AC high-frequency interference resistance capacitor C3. The stable AC voltage after AC filtering and AC high-frequency interference resistance treatment is rectified into positive and negative DC inputs in DC form by means of the first positive voltage rectifying diode D1, the second positive voltage rectifying diode D3, the first negative voltage rectifying diode D2, and the second negative voltage rectifying diode D4. Then, DC voltage processing is carried out according to the same idea as AC voltage processing, that is: the positive input is connected to the positive voltage high-frequency interference resistance capacitor C4 and the positive voltage filtering capacitor C6 for positive DC filtering and interference resistance treatment. The negative input is connected to the negative voltage high-frequency interference resistance capacitor C5 and the negative voltage filtering capacitor C7 for negative DC filtering and interference resistance treatment. Then, they are respectively input to the positive voltage lead-out terminal and the negative voltage lead-out terminal of the zero-adjusting potentiometer. The sliding contact lead-out terminal of the zero-adjusting potentiometer is electrically connected to the input terminal of the voltage display device after passing through a capacitor C8 and a resistor R7. And the output terminal of the voltage display device is set as the center tap. The center tap is connected to the positive and negative common ground through a common step-down resistor R2 to complete the operation of this circuit.

[0043] When connected to DC high voltage, as Figure 4 shown, the input DC high voltage is respectively subjected to impedance step-down on the positive and negative DC high voltages input through the first positive pole step-down resistor R1 and the negative pole step-down resistor R3. At this time, the AC primary filtering capacitor C1, the first AC high-frequency interference resistance capacitor C2, the second AC high-frequency interference resistance capacitor C3, the first positive voltage rectifying diode D1, the second positive voltage rectifying diode D2, the first negative voltage rectifying diode D3, and the second negative voltage rectifying diode D4 in this circuit do not participate in the operation (each capacitor is regarded as an open circuit, and each diode is regarded as a short circuit), that is: the stepped-down positive input is connected to the positive voltage high-frequency interference resistance capacitor C4 and the positive voltage filtering capacitor C6 for positive DC filtering and interference resistance treatment. The stepped-down negative input is connected to the negative voltage high-frequency interference resistance capacitor C5 and the negative voltage filtering capacitor C7 for negative DC filtering and interference resistance treatment. Then, they are respectively input to the positive voltage lead-out terminal and the negative voltage lead-out terminal of the zero-adjusting potentiometer. The sliding contact lead-out terminal of the zero-adjusting potentiometer is electrically connected to the input terminal of the voltage display device after passing through a capacitor C8 and a resistor R7. And the output terminal of the voltage display device is set as the center tap. The center tap is connected to the positive and negative common ground through a common step-down resistor R2 to complete the operation of this circuit.

[0044] The digital display type ion blower circuit provided by this embodiment, as a specific implementation manner, the step-down circuit therein includes a positive electrode step-down unit and a negative electrode step-down unit. The positive electrode step-down unit includes a first positive electrode step-down resistor R1 and a second positive electrode step-down resistor R4 connected in series with each other. The negative electrode step-down unit includes a negative electrode step-down resistor R3. Such a step-down circuit can ensure good step-down ability under both AC and DC high-voltage inputs, and better ensure the step-down operation of the high-voltage input.

[0045] The digital display type ion blower circuit provided by this embodiment, as a specific implementation manner, the DC step-down unit therein includes a positive voltage step-down load resistor R5 and a negative voltage step-down load resistor R6; wherein, the positive voltage step-down load resistor R5 is connected in parallel across both ends of the positive voltage filter capacitor C6, and the negative voltage step-down load resistor R6 is connected in parallel across both ends of the negative voltage filter capacitor C7, for performing secondary step-down to ensure that the voltage display device can adapt to the incoming voltage.

[0046] The digital display type ion blower circuit provided by this embodiment, as a specific implementation manner, a capacitor C8 is also electrically connected to the sliding contact lead-out end of the zero-adjusting potentiometer, and the negative terminal of the capacitor C8 is connected to the common ground; a resistor R7 is also electrically connected between the sliding contact lead-out end of the zero-adjusting potentiometer and the input end of the voltage display device, and the output end of the voltage display device is connected to the positive and negative common ground through a common step-down resistor R2. The positive and negative common ground here is a center tap led out from the output end of the high-voltage transformer.

[0047] In this embodiment, the voltage display device can sample the input voltage information and perform residual voltage display. By judging the range of the residual voltage display value, the conclusion of whether the ion blower is faulty can be obtained; for example, if the display is: -6V in the AC state and +3V in the DC state, it means that the ion blower is working normally and there is no fault; if the display is: in the AC state, the displayed positive and negative voltages are higher than 10V, 20V, 30V, lower than -10V, -20V, -30V, and in the DC state, the displayed positive and negative voltages are higher than 5V, 10V, 15V, lower than -5V, -10V, -15V, it means that the ion blower is working abnormally and a fault has occurred.

[0048] Finally, it should be noted that: the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A digital display ion blower circuit, characterized in that: It includes a step-down circuit, an AC voltage anti-interference circuit, a rectifier circuit, a DC voltage anti-interference circuit and a voltage display device; The input end of the step-down circuit is connected to a high voltage power supply; The input end of the AC voltage anti-interference circuit is electrically connected to the output end of the step-down circuit, and the output end of the AC voltage anti-interference circuit is electrically connected to the input end of the rectifier circuit; The rectifier circuit includes a positive voltage output terminal and a negative voltage output terminal, wherein the positive voltage output terminal is electrically connected to the positive voltage input terminal of the DC voltage anti-interference circuit, the negative voltage output terminal is electrically connected to the negative voltage input terminal of the DC voltage anti-interference circuit, and the output terminal of the DC voltage anti-interference circuit is electrically connected to the sampling voltage terminal of the voltage display device.

2. The digital display ion blower circuit according to claim 1, characterized in that: The step-down circuit includes a positive step-down unit and a negative step-down unit, the positive step-down unit includes a first positive step-down resistor R1 and a second positive step-down resistor R4 connected in series, the negative step-down unit includes a negative step-down resistor R3, and the input end of the first positive step-down resistor R1 and the input end of the negative step-down resistor R3 are both electrically connected to the transmission end of the high-voltage power supply.

3. The digital display ion blower circuit according to claim 2, characterized in that: The AC voltage anti-interference circuit includes a first filtering unit and an AC anti-high-frequency interference unit, wherein the first filtering unit includes an AC primary filtering capacitor C1, and the AC anti-high-frequency interference unit includes a first AC anti-high-frequency interference capacitor C2 and a second AC anti-high-frequency interference capacitor C3; The AC primary filter capacitor C1 is electrically connected between the output end of the positive step-down unit and the output end of the negative step-down unit; the input end of the first AC anti-high-frequency interference capacitor C2 is electrically connected to the second positive step-down resistor R4, the output end of the first AC anti-high-frequency interference capacitor C2 is electrically connected to the rectifier circuit, the input end of the second AC anti-high-frequency interference capacitor C3 is electrically connected to the negative step-down resistor R3, and the output end of the second AC anti-high-frequency interference capacitor C3 is electrically connected to the rectifier circuit.

4. The digital display ion blower circuit according to claim 3, characterized in that: The rectifier circuit includes a first positive voltage rectifier diode D1, a second positive voltage rectifier diode D3, a first negative voltage rectifier diode D2 and a second negative voltage rectifier diode D4; The input end of the first positive voltage rectifier diode D1 is electrically connected to one end of the first AC anti-high frequency interference capacitor C2, the input end of the second positive voltage rectifier diode D3 is electrically connected to the other end of the first AC anti-high frequency interference capacitor C2, and the output ends of the first positive voltage rectifier diode D1 and the second positive voltage rectifier diode D3 are electrically connected to form a positive voltage rectifier output end; The input end of the first negative voltage rectifier diode D2 is electrically connected to one end of the second AC anti-high-frequency interference capacitor C3, the input end of the second negative voltage rectifier diode D4 is electrically connected to the other end of the second AC anti-high-frequency interference capacitor C3, and the output ends of the first negative voltage rectifier diode D2 and the second negative voltage rectifier diode D4 are electrically connected to form a negative voltage rectifier output end.

5. The digital display ion blower circuit according to claim 4, characterized in that: The DC voltage anti-interference circuit includes a DC anti-high-frequency interference unit and a second filtering unit, wherein the DC anti-high-frequency interference unit includes a positive voltage anti-high-frequency interference capacitor C4 and a negative voltage anti-high-frequency interference capacitor C5, and the second filtering unit includes a positive voltage filtering capacitor C6 and a negative voltage filtering capacitor C7; The input end of the positive voltage anti-high-frequency interference capacitor C4 and the input end of the positive voltage filter capacitor C6 are electrically connected to the positive voltage rectifier output end, and the input end of the negative voltage anti-high-frequency interference capacitor C5 and the input end of the negative voltage filter capacitor C7 are electrically connected to the negative voltage rectifier output end; and the DC anti-high-frequency interference unit and the second filter unit are both connected to the positive and negative voltage common ground.

6. The digital display ion blower circuit according to claim 1, characterized in that: It also includes a zero adjustment potentiometer, the positive voltage lead end of the zero adjustment potentiometer is electrically connected to the positive voltage output end of the DC voltage anti-interference circuit, and the negative voltage lead end of the zero adjustment potentiometer is electrically connected to the negative voltage output end of the DC voltage anti-interference circuit; the sliding contact lead end of the zero adjustment potentiometer is electrically connected to the input end of the voltage display device.

7. The digital display ion blower circuit according to claim 6, characterized in that: The sliding contact lead-out end of the zero adjustment potentiometer is also electrically connected to a capacitor C8 and a resistor R7, the negative terminal of the capacitor C8 is connected to the positive and negative voltage common ground, and the negative terminal of the resistor R7 is electrically connected to the sampling voltage end of the voltage display device.

8. The digital display ion blower circuit according to claim 7, characterized in that: It also includes a DC step-down unit, which includes a positive voltage step-down load resistor R5 and a negative voltage step-down load resistor R6, one end of the positive voltage step-down load resistor R5 is electrically connected to the positive voltage output end of the rectifier circuit, one end of the negative voltage step-down load resistor R6 is electrically connected to the negative voltage output end of the rectifier circuit, and the other ends of the positive voltage step-down load resistor R5 and the negative voltage step-down load resistor R6 are both connected to the positive and negative voltage common grounds.

9. The digital display ion blower circuit according to claim 1, characterized in that: The output end of the voltage display device is connected to the positive and negative voltage common ground through a common voltage-dropping resistor R2.

10. The digital display ion blower circuit according to claim 9, characterized in that: The positive and negative voltages are commonly set to a center tap drawn from the high voltage output end of the high voltage power supply.

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