Negative ion generator with high efficiency electrostatic isolation and elimination effect

Abstract

The utility model provides a kind of negative ion generator with high-efficiency electrostatic isolation and elimination effect, its insulated shell is equipped with negative ion generator circuit, input electric wire and 2 root output electric wire, the end of input, output electric wire is worn out insulated shell, and the end of each output electric wire is electrically connected with conductive tip, and the circuit board of negative ion generator circuit is equipped with input power supply part and power conversion part and multistage voltage doubler rectifier part that are sequentially electrically connected;Its characterized in that: circuit board has first board part, second board part and connecting part, first board part and second board part are arranged with interval to form electric gap, and circuit board has connecting part in electric gap, input power supply part is set on first board part, power conversion part and multistage voltage doubler rectifier part are set on second board part, and input power supply part is electrically connected with power conversion part by connecting part.The utility model can effectively weaken electrostatic transmission, and then reach the technical purpose of improving electrostatic elimination effect.

Description

Technical Field

[0001] This utility model relates to the field of air purification, specifically a negative ion generator with efficient electrostatic isolation and elimination effects. Background Technology

[0002] Air purifiers with negative ion generation functions typically produce negative air ions through a negative ion generator. A negative ion generator is a device that generates negative air ions. It takes the DC or AC power supplied by the input power source, passes it through an oscillating circuit and a fully coupled transformer to convert it into high-voltage AC, and then passes it through a rectifier and filter circuit to obtain high-voltage DC. This high-voltage DC is then multiplied at its negative electrode to obtain a negative high-voltage DC electrode. The positive electrode of this high-voltage DC acts as the opposite electrode to its negative high-voltage electrode, creating a negative high-voltage difference between them, which ionizes the air and generates negative air ions.

[0003] The negative high-voltage electrode is connected to a release tip made of a conductive material such as metal or carbon. This tip utilizes a high DC high voltage to generate a high corona discharge that ionizes the air, causing a large number of electrons (e-) to be generated at high speed. These electrons combine with oxygen and other substances in the air to form negative air ions. The opposite electrode is connected to a conductive end made of a conductive material such as metal or carbon and forms a strong electric field in contact with the air. It absorbs electrons (e-) from the air and forms a loop within the high-voltage circuit of the negative ion generator, thus allowing the high corona discharge of air to continue and continuously generate negative air ions.

[0004] Ideally, all electrons generated by the negative high-voltage electrode should be absorbed by the opposite electrode, forming an ideal current loop within the high-voltage circuit of the negative ion generator, resulting in a continuous and stable ionization phenomenon. In practice, however, most of the electrons (e-) generated by the negative high-voltage electrode escape into the air to form negative ions, with only a very small number being absorbed by the opposite electrode. Therefore, the current loop within the generator's high-voltage circuit is incomplete and unbalanced. According to the law of conservation of charge, the loss of one electron produces one positive ion. These positive ions accumulate in the negative ion generator circuit, forming a large amount of positive static charge. The higher the output high voltage of the negative ion generator, the higher the concentration of negative ions produced, and the greater the amount of static electricity accumulated in the generator. This accumulation of static electricity can interfere with the primary circuitry or, through the primary circuitry, interfere with the control circuitry. Control circuits interfered with by static electricity may experience control failure or damage. Furthermore, the accumulated static electricity can be conducted through the power supply line of the negative ion generator to the power supply system, affecting the normal operation of the entire system.

[0005] Traditional negative ion generators typically house the negative ion generator circuitry within a single-chamber casing encapsulated in insulating potting material. The circuit board is usually a single, rectangular or circular plate, containing sequentially connected input power, power conversion, and multi-stage voltage multiplier rectifier sections. The input power supply stabilizes the input voltage, the power conversion boosts the voltage, and the multi-stage voltage multiplier rectifier stabilizes the output voltage. Static electricity transfer is somewhat restricted by the insulating potting material, making it easier for accumulated static electricity to conduct through the internal circuitry from the multi-stage voltage multiplier rectifier to the power conversion and then to the input power supply. Static electricity conducted to the input power supply can even be transferred through the generator's input wires to the power supply system, negatively impacting its normal operation. Therefore, improvements are necessary. Summary of the Invention

[0006] The purpose of this invention is to propose a negative ion generator with efficient electrostatic isolation and elimination effects. By reducing the electrical connection area and further weakening the electrostatic transmission through physical isolation, the invention aims to improve the electrostatic elimination effect.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] A negative ion generator with high-efficiency electrostatic isolation and elimination effects includes an insulating shell, a negative ion generator circuit housed and encapsulated within the insulating shell, an input wire and two output wires electrically connected to the negative ion generator circuit, with the ends of the input and output wires extending out of the insulating shell. Each output wire has a conductive tip electrically connected to its end. The negative ion generator circuit includes a circuit board, and an input power supply section, a power conversion section, and a multi-stage voltage multiplier rectifier section sequentially connected to the circuit board. The input power supply section is used for stable voltage input, and the power conversion section... The circuit board is characterized by having a first board portion, a second board portion, and a connecting portion. An electrical isolation gap is formed between the first board portion and the second board portion. The circuit board has a connecting portion within the electrical isolation gap. The input power supply portion is disposed on the first board portion, and the power conversion portion and the multi-stage voltage multiplier rectifier portion are disposed on the second board portion. The input power supply portion and the power conversion portion are electrically connected through the connecting portion.

[0009] Furthermore, the insulating shell has a vertically arranged partition portion that divides the space into a first chamber and a second chamber. The partition portion has a partition opening that connects the first chamber and the second chamber. The input power supply portion is housed and encapsulated in the first chamber, while the power conversion portion and the multi-stage voltage multiplier rectifier portion are housed and encapsulated in the second chamber. The connection portion of the circuit board passes through the partition opening.

[0010] In this invention, the specific structure of the input power supply section can be as follows: the input power supply section includes a dual-tube oscillation module, a transformer T1, a rectifier and filter module, and a voltage regulator module; the dual-tube oscillation module receives DC voltage through an input wire and inverts the DC voltage; the primary side of the transformer T1 is connected to the output terminal of the dual-tube oscillation module; the secondary side of the transformer T1 is connected to the input terminal of the rectifier and filter module; the output terminal of the rectifier and filter module is connected to the input terminal of the voltage regulator module, and the output terminal of the voltage regulator module is connected to the input terminal of the power conversion section.

[0011] The dual-tube oscillation module may include an electrostatic discharge protection tube (ESD1), which is connected to the positive and negative terminals of the input terminal of the dual-tube oscillation module.

[0012] Additionally, the voltage regulator module may include an electrostatic discharge protection tube (ESD2), which is connected to the positive and negative terminals of the output terminal of the voltage regulator module.

[0013] In addition, the dual-transistor oscillation module may also include transistors Q1 and Q2, capacitor C1, and resistor R1; the primary side of transformer T1 is provided with leads P1, P2, P3, P4, P5, and P6; the positive terminal of the input of the dual-transistor oscillation module is connected to lead P2 in one direction and then connected to the negative terminal of the input of the dual-transistor oscillation module after passing through electrostatic discharge protection tube ESD1 and capacitor C1 in sequence; the positive terminal of the input of the dual-transistor oscillation module is also connected to lead P5 after passing through resistor R1; the emitters of transistors Q1 and Q2 are both grounded; the collector of transistor Q1 is connected to lead P1; the base of transistor Q1 is connected to lead P4; the collector of transistor Q2 is connected to lead P3; and the base of transistor Q2 is connected to lead P6.

[0014] The rectifier and filter module may include diodes D1, D2, D3, and D4, capacitor C2, and capacitor C3. The anode of diode D1 is connected to one end of the secondary side of transformer T1; the cathode of diode D1 is connected to the cathode of diode D2; the anode of diode D2 is connected to the cathode of diode D3; the cathode of diode D3 is connected to the other end of the secondary side of transformer T1; the anode of diode D3 is connected to the anode of diode D4; the cathode of diode D4 is connected to the anode of diode D1; capacitors C2 and C3 are connected in parallel; one end of capacitor C2 is connected to the cathode of diode D1; the other end of capacitor C2 is connected to the anode of diode D4; and capacitor C3 is connected to the voltage regulator module.

[0015] The voltage regulator module may include a voltage regulator chip U, a capacitor C4, and a capacitor C5; the capacitors C4, C5, and the electrostatic discharge protection diode ESD2 are connected in parallel in sequence; the input terminal of the voltage regulator chip U is connected to the output terminal of the rectifier and filter module; the output terminal of the voltage regulator chip U is connected to the positive and negative terminals of the output terminal of the voltage regulator module after passing through the capacitors C4, C5, and ESD2.

[0016] In this utility model, the specific structure of the power conversion section can be as follows: the power conversion section includes a self-excited oscillation circuit module and a transformer U1. The output terminal of the voltage regulator module of the input power section is connected to the input terminal of the self-excited oscillation circuit module, and the output terminal of the self-excited oscillation circuit module is connected to the primary side of the transformer U1. Thus, the power conversion section uses the self-excited oscillation circuit module to boost the low voltage output of the voltage regulator module through the transformer U1, and then converts it into AC high voltage output from the secondary side of the transformer U1.

[0017] The self-excited oscillation circuit module may include resistors R2, R3, and R4, capacitors C6, C7, C8, and C9, and transistor Q3; the primary side of transformer U1 has leads E1, E2, E3, E4, and E5; the positive terminal of the input of the self-excited oscillation circuit module, after passing through resistor R2, is connected to lead E5 of transformer U1, and after passing through capacitor C6, it is connected to the negative terminal of the input of the self-excited oscillation circuit module.

[0018] Resistor R3 is connected in series with resistor R4, and capacitor C8 is connected in parallel with resistor R4. The other end of resistor R3 is connected to the base of transistor Q3 and then to the negative terminal of the input of the self-excited oscillation circuit module through capacitor C7. The other end of resistor R4 is connected to the lead-out terminal E4 of transformer U1.

[0019] The lead-out terminal E2 of transformer U1 is connected to the negative terminal of the input terminal of the self-excited oscillation circuit module. The lead-out terminal E1 of transformer U1 is connected to the collector of transistor Q3 and, after passing through capacitor C9, to the negative terminal of the input terminal of the self-excited oscillation circuit module. The emitter of transistor Q3 is connected to the negative terminal of the input terminal of the self-excited oscillation circuit module.

[0020] In this utility model, the specific structure of the multi-stage voltage multiplier rectifier section can be as follows: the multi-stage voltage multiplier rectifier section further includes a rectifier voltage multiplier circuit module, the secondary side of the transformer U1 is connected to the input terminal of the rectifier voltage multiplier circuit module, and the AC high voltage output by the transformer U1 is converted into the required DC negative high voltage after passing through the rectifier voltage multiplier circuit module.

[0021] The rectifier voltage multiplier circuit module may include diode U2, diode U3, capacitor C10, capacitor C11, resistor R5 and resistor R6; the secondary side of transformer U1 is provided with lead-out terminal E6 and lead-out terminal E7.

[0022] The leads E6 of the secondary side of transformer U1, diodes U2 and U3 and resistor R6 are connected in sequence and then connected to one of the output wires so that the conductive tip at the end is used as the negative high voltage electrode. The positive terminal of diode U2 is connected to the negative terminal of diode U3, and the two ends of capacitor C11 are connected to the negative terminal of diode U2 and the positive terminal of diode U3, respectively.

[0023] The lead-out terminal E7 of the secondary side of transformer U1 has two connections: first, it is connected to resistor R5 and then to another output wire, with the conductive tip at the end serving as the opposite electrode; second, it is connected to the positive terminal of diode U2 and the negative terminal of diode U3 after passing through capacitor C10.

[0024] This utility model has the following substantial features and advancements:

[0025] 1. This utility model effectively reduces the electrical connection area between the input power supply section and the power conversion section and the multi-stage voltage multiplier rectifier section of the negative ion generator circuit by isolating the power supply section from the power conversion section and the multi-stage voltage multiplier rectifier section. This reduces the conduction path of static electricity along the circuit board and reduces the accumulated static electricity conducted from the multi-stage voltage multiplier rectifier section to the power conversion section and then to the input power supply section through the internal circuit board. This achieves a good static electricity isolation effect and ultimately reduces the transmission of static electricity to the power supply system through the input wire of the negative ion generator, thereby reducing the adverse effects on the normal operation of the entire power supply system.

[0026] 2. This utility model further improves the electrostatic isolation effect by using a partition inside the insulating shell to physically isolate the input power supply section from the power conversion section and the multi-stage voltage multiplier rectifier section, thereby preventing the conduction of static electricity along the surface of the insulating potting material inside the insulating shell.

[0027] 3. The negative ion generator circuit of this utility model mainly includes an input power supply section, a power conversion section that converts AC high voltage through a transformer after passing through a dual-tube oscillation module, and a multi-stage voltage multiplier rectifier section. Both the input power supply section and the power conversion section use isolated high-voltage transformers to achieve double-stage electrostatic isolation. While generating high voltage and high concentration of negative ions, the negative ion generator avoids the accumulation of static electricity inside the generator, thereby preventing interference with the control circuit of the product using this negative ion generator and the entire power supply system.

[0028] 4. The high-voltage transformer used in the negative ion generator circuit of this utility model has an independent coil structure for both the primary and secondary windings, with no electrical connection between them. Energy is transferred only through magnetic field coupling via a ferrite core. The insulation gap between the primary and secondary windings of the high-voltage transformer prevents leakage and arcing between them. This safety insulation gap also reduces the impact of static electricity generated by the secondary high voltage on the primary and control circuits.

[0029] 5. Since static electricity can accumulate on the surface of the negative ion generator, in order to further eliminate the hidden danger of static electricity conduction, this utility model connects ESD electrostatic discharge protection tubes in parallel to the positive and negative input terminals and the positive and negative output terminals of the input power supply section. When the accumulated static electricity in the circuit reaches the threshold of the ESD electrostatic discharge protection tube, a discharge phenomenon occurs, thereby protecting the circuit. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0031] Figure 2 This is a schematic diagram of the internal structure of the insulating shell of this utility model.

[0032] Figure 3 This is a schematic diagram of the circuit structure of the negative ion generator of this utility model.

[0033] Figure 4 This is a schematic diagram of the circuit layout of the negative ion generator of this utility model.

[0034] Figure 5 This is a circuit diagram of the input power supply section in this utility model.

[0035] Figure 6 This is a circuit diagram of the power conversion section and the multi-stage voltage multiplier rectifier section in this utility model. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings.

[0037] Example

[0038] refer to Figures 1 to 6A negative ion generator with efficient electrostatic isolation and elimination effect includes an insulating shell 6, a negative ion generator circuit encapsulated in the insulating shell 6 with insulating potting material, an input wire 61 and two output wires 62 electrically connected to the negative ion generator circuit, the ends of the input wire 61 and the output wires 62 respectively passing through the insulating shell 6, and each output wire 62 having a conductive tip 63 electrically connected to its end.

[0039] The negative ion generator circuit includes a circuit board 7, and an input power supply section 10, a power conversion section 11, and a multi-stage voltage multiplier rectifier section 12, which are disposed on the circuit board 7 and electrically connected in sequence through the circuit board 7. The input power supply section 10 is used for stable voltage input, the power conversion section 11 is used for voltage boosting, and the multi-stage voltage multiplier rectifier section 12 is used for stable voltage output. The input wire 61 is electrically connected to the input terminal of the input power supply section 10, and the output wire 62 is electrically connected to the output terminal of the multi-stage voltage multiplier rectifier section.

[0040] For details, please refer to the following: Figure 3 The circuit board 7 has a first plate portion 74, a second plate portion 75, and a connecting portion 76. An electrical isolation gap 70 is formed between the first plate portion 74 and the second plate portion 75. The circuit board 7 has a connecting portion 76 within the electrical isolation gap 70. The input power supply portion 10 is disposed on the first plate portion 74, and the power conversion portion 11 and the multi-stage voltage multiplier rectifier portion 12 are disposed on the second plate portion 75. The input power supply portion 10 and the power conversion portion 11 are electrically connected through the connecting portion 76.

[0041] In the above structure, the first plate portion 74 and the second plate portion 75 are separated by the electrical isolation gap 70, thereby achieving the separation between the input power supply section 10 and the power conversion section 11 and the multi-stage voltage multiplier rectifier section 12. Simultaneously, the connection portion 76 facilitates the electrical connection between the input power supply section 10 and the power conversion section 11. In this way, the connection portion 76 effectively reduces the electrical connection area between the input power supply section 10 and the power conversion section 11 via the circuit board 7, reducing the conduction path of static electricity along the circuit board 7. This effectively reduces the conduction of static electricity from the power conversion section 11 and the multi-stage voltage multiplier rectifier section 12 to the input power supply section 10, improving the electrostatic isolation effect.

[0042] Furthermore, in this embodiment, specific reference is made. Figure 2 and Figure 4The insulating housing 6 has a vertically arranged partition 66 that divides the housing into a first chamber 64 and a second chamber 65. The partition 66 has a partition opening 67 that connects the first chamber 64 and the second chamber 65. The input power supply section 10 is housed and encapsulated in the first chamber 64, and the power conversion section 11 and the multi-stage voltage multiplier rectifier section 12 are housed and encapsulated in the second chamber 65. The connection section 76 of the circuit board 7 passes through the partition opening 67.

[0043] In the above structure, the partition portion 66 is integrally made of insulating material along with the insulating shell 6. Utilizing its own insulating capabilities, it physically isolates the input power supply portion 10 from the power conversion portion 11 and the multi-stage voltage multiplier rectifier portion 12. As described in the background section of this application, the transfer of static electricity on the insulating potting material is somewhat limited. However, the transfer of static electricity on the insulating potting material is still unavoidable. Therefore, by physically isolating the insulating potting material potted on the surface of the input power supply portion 10 and the first plate portion 74 from the insulating potting material potted on the surface of the power conversion portion 11 and the multi-stage voltage multiplier rectifier portion 12 using the partition portion 66, static electricity conduction along the surface of the insulating potting material is prevented, further improving the electrostatic isolation effect.

[0044] For details, please refer to the following: Figure 5 The input power supply section 10 includes a dual-tube oscillation module 1, a transformer T1, a rectifier and filter module 2, and a voltage regulator module 3. The dual-tube oscillation module 1 receives DC voltage through an input wire 61 and inverts the DC voltage. The primary side of the transformer T1 is connected to the output terminal of the dual-tube oscillation module 1. The secondary side of the transformer T1 is connected to the input terminal of the rectifier and filter module 2. The output terminal of the rectifier and filter module 2 is connected to the input terminal of the voltage regulator module 3. The output terminal of the voltage regulator module 3 is connected to the input terminal of the power conversion section 11, and the voltage regulator module 3 outputs a stable I-voltage.

[0045] The dual-tube oscillation module 1 includes an electrostatic discharge protection diode (ESD1), which is connected to the positive and negative terminals of the input terminal of the dual-tube oscillation module 1. In the above circuit structure, the input power supply section 10 provides the first electrostatic protection barrier for the circuit through the ESD1. The input terminal of the dual-tube oscillation module 1, which is also the input terminal of the input power supply section, provides electrostatic protection for the circuit, effectively preventing circuit damage or performance degradation caused by electrostatic discharge (ESD) events.

[0046] In addition, the voltage regulator module 3 includes an electrostatic discharge protection diode (ESD2), which is connected to the positive and negative terminals of the output terminal of the voltage regulator module 3. In the above circuit structure, the ESD2 provides a second electrostatic protection barrier for the circuit. The output terminal of the voltage regulator module 3, which is also the output terminal of the input power supply section, provides electrostatic protection for the circuit, strengthening the prevention of circuit damage or performance degradation caused by electrostatic discharge (ESD) events.

[0047] Furthermore, the dual-transistor oscillation module 1 also includes transistors Q1 and Q2, capacitor C1, and resistor R1; the primary side of transformer T1 has leads P1, P2, P3, P4, P5, and P6; the positive terminal of the input of the dual-transistor oscillation module 1 is connected to lead P2 in one direction and then connected to the negative terminal of the input of the dual-transistor oscillation module 1 after passing through electrostatic discharge protection tube ESD1 and capacitor C1 in sequence; the positive terminal of the input of the dual-transistor oscillation module 1 is also connected to lead P5 after passing through resistor R1; the emitters of transistors Q1 and Q2 are both grounded; the collector of transistor Q1 is connected to lead P1; the base of transistor Q1 is connected to lead P4; the collector of transistor Q2 is connected to lead P3; and the base of transistor Q2 is connected to lead P6. In this embodiment, transistors Q1 and Q2 are specifically NPN transistors.

[0048] In the above structure, the 12V DC power supply enters from the input terminal of the dual-transistor oscillation module 1. Through transistors Q1 and Q2 and capacitor C1, a positive feedback oscillation circuit is formed with the primary side of transformer T to quickly invert and oscillate the input 12V DC power supply.

[0049] The rectifier and filter module 2 includes diodes D1, D2, D3, and D4, capacitor C2, and capacitor C3. The anode of diode D1 is connected to one end of the secondary side of transformer T1; the cathode of diode D1 is connected to the cathode of diode D2; the anode of diode D2 is connected to the cathode of diode D3; the cathode of diode D3 is connected to the other end of the secondary side of transformer T1; the anode of diode D3 is connected to the anode of diode D4; the cathode of diode D4 is connected to the anode of diode D1; capacitors C2 and C3 are connected in parallel; one end of capacitor C2 is connected to the cathode of diode D1; the other end of capacitor C2 is connected to the anode of diode D4; and capacitor C3 is connected to the voltage regulator module 3.

[0050] In the above structure, a bridge rectifier circuit composed of four diodes can effectively rectify the AC power on the secondary side of transformer T1, while capacitors C2 and C3 can filter the rectified AC power.

[0051] The voltage regulator module 3 also includes a voltage regulator chip U, a capacitor C4, and a capacitor C5; the capacitors C4, C5, and the electrostatic discharge protection tube ESD2 are connected in parallel in sequence; the input terminal of the voltage regulator chip U is connected to the output terminal of the rectifier and filter module 2; the output terminal of the voltage regulator chip U is connected to the positive and negative terminals of the output terminal of the voltage regulator module 3 after passing through the capacitors C4, C5, and ESD2.

[0052] In this embodiment, the input power supply section first connects the input terminal of the dual-tube oscillation module 1 to an external 12V DC power supply. The 12V DC power supply is inverted by the dual-tube oscillation module 1 and, in conjunction with the primary side of transformer T1, generates high-frequency AC power. After magnetic field induction, the AC power is then connected to the input terminal of the voltage regulator module 3 via the secondary side of transformer T1. The voltage regulator module 3 outputs a stable 12V DC voltage after voltage regulation. This voltage is then further optimized by the power conversion section 11 and the multi-stage voltage multiplier rectifier section 12 before supplying power to the negative ion generator. Simultaneously, ESD protection diodes ESD1 and ESD2 are used to provide electrostatic discharge protection to the circuit from the input and output terminals of the input power supply section, respectively. This provides multiple electrostatic protection barriers for the circuit, effectively preventing circuit damage or performance degradation caused by electrostatic discharge (ESD) events.

[0053] For details, please refer to the following: Figure 6 The power conversion section 11 further includes a self-excited oscillation circuit module 4 and a transformer U1. The output terminal of the voltage regulator module 3 of the input power supply section 10 is connected to the input terminal of the self-excited oscillation circuit module 4, and the output terminal of the self-excited oscillation circuit module 4 is connected to the primary side of the transformer U1. Thus, the power conversion section 11 uses the self-excited oscillation circuit module 4 to boost the low voltage output of the voltage regulator module 3 through the transformer U1, and then converts it into a high-voltage AC output from the secondary side of the transformer U1.

[0054] Furthermore, the self-excited oscillation circuit module 4 includes resistors R2, R3, and R4, capacitors C6, C7, C8, and C9, and transistor Q3; the primary side of the transformer U1 is provided with leads E1, E2, E3, E4, and E5; the positive terminal of the input of the self-excited oscillation circuit module 4, after passing through resistor R2, is connected to lead E5 of the transformer U1, and after passing through capacitor C6, it is connected to the negative terminal of the input of the self-excited oscillation circuit module 4.

[0055] Resistor R3 is connected in series with resistor R4, capacitor C8 is connected in parallel with resistor R4, and the other end of resistor R3 is connected to the base of transistor Q3 and then to the negative terminal of the input of self-excited oscillation circuit module 4 after passing through capacitor C7. The other end of resistor R4 is connected to the lead-out terminal E4 of transformer U1.

[0056] The lead-out terminal E2 of transformer U1 is connected to the negative terminal of the input terminal of self-excited oscillation circuit module 4. The lead-out terminal E1 of transformer U1 is connected to the collector of transistor Q3 and then connected to the negative terminal of the input terminal of self-excited oscillation circuit module 4 after passing through capacitor C9. The emitter of transistor Q3 is connected to the negative terminal of the input terminal of self-excited oscillation circuit module 4.

[0057] In the above circuit structure, (1) the DC VCC voltage of the power conversion section 11 is connected to the lead-out terminal E5 of the transformer U1 through the resistor R2 in the circuit. The resistor R2 plays the role of current limiting and voltage instantaneous impact protection. (2) C6 is a filter capacitor. The capacitor C8, resistor R4, resistor R3 and capacitor C7 are connected to form an oscillation feedback circuit. (3) One end of capacitor C7 is connected to INGND, and the other end is connected to resistor R3 and the base of transistor Q3. When capacitor C7 is charging, it is at a low voltage and transistor Q3 is cut off. When capacitor C7 is fully charged, it satisfies the state of transistor Q3 conduction. When capacitor C7 discharges, transistor Q3 is turned on by the base of transistor Q3, and the cycle repeats.

[0058] For further details, please refer to [link / reference]. Figure 6 The multi-stage voltage multiplier rectifier section 12 further includes a voltage multiplier rectifier circuit module 5. The secondary side of the transformer U1 is connected to the input terminal of the voltage multiplier rectifier circuit module 5. The AC high voltage output by the transformer U1 is converted into the required DC negative high voltage after passing through the voltage multiplier rectifier circuit module 5.

[0059] The rectifier voltage multiplier circuit module 5 specifically includes diodes U2 and U3, capacitors C10 and C11, resistors R5 and R6; the secondary side of transformer U1 has leads E6 and E7. Leads E6, diodes U2 and U3, and resistor R6 on the secondary side of transformer U1 are sequentially connected to one of the output wires 62, with the conductive tip 63 at the end serving as the negative high-voltage electrode. The positive terminal of diode U2 is connected to the negative terminal of diode U3, and the two ends of capacitor C11 are connected to the negative terminal of diode U2 and the positive terminal of diode U3, respectively. Leads E7 on the secondary side of transformer U1 have two connections: one is to connect to resistor R5, then to one of the output wires 62, with the conductive tip 63 at the end serving as the opposite electrode; the other is to connect to the positive terminal of diode U2 and the negative terminal of diode U3, respectively, after passing through capacitor C10.

[0060] In the above circuit structure, the output terminal of the rectifier voltage multiplier circuit module 5 connects the rectified and multiplied DC negative high voltage to release tips made of conductive materials such as metal or carbon elements to form negative high voltage electrodes and opposite electrodes respectively. A high voltage difference is formed between the two electrodes to ionize the air and generate high concentration of negative air ions.

Claims

1. A negative ion generator with high-efficiency electrostatic isolation and elimination effect, comprising an insulating shell (6), a negative ion generator circuit housed and encapsulated within the insulating shell (6), an input wire (61) and two output wires (62) electrically connected to the negative ion generator circuit respectively, the ends of the input wire (61) and the output wires (62) respectively extending out of the insulating shell (6), and each output wire (62) having a conductive tip (63) electrically connected to its end; the negative ion generator circuit includes a circuit board (7) and components disposed within the circuit. An input power supply section (10), a power conversion section (11), and a multi-stage voltage multiplier rectifier section (12) are sequentially and electrically connected on the board (7) via the circuit board (7). The input power supply section (10) is used for stable voltage input, the power conversion section (11) is used for voltage boosting, and the multi-stage voltage multiplier rectifier section (12) is used for stable voltage output. The input wire (61) is electrically connected to the input terminal of the input power supply section (10), and the output wire (62) is electrically connected to the output terminal of the multi-stage voltage multiplier rectifier section. The characteristic feature is that: The circuit board (7) has a first board portion (74), a second board portion (75) and a connecting portion (76). An electrical isolation gap (70) is formed between the first board portion (74) and the second board portion (75). The circuit board (7) has a connecting portion (76) within the electrical isolation gap (70). The input power supply portion (10) is disposed on the first board portion (74). The power conversion portion (11) and the multi-stage voltage multiplier rectifier portion (12) are disposed on the second board portion (75). The input power supply portion (10) and the power conversion portion (11) are electrically connected through the connecting portion (76).

2. The negative ion generator with high-efficiency electrostatic isolation and elimination effect according to claim 1, characterized in that: The insulating shell (6) has a vertically arranged partition (66) that divides it into a first chamber (64) and a second chamber (65). The partition (66) has a partition opening (67) that connects the first chamber (64) and the second chamber (65). The input power supply part (10) is housed and encapsulated in the first chamber (64). The power conversion part (11) and the multi-stage voltage multiplier rectifier part (12) are housed and encapsulated in the second chamber (65). The connection part (76) of the circuit board (7) passes through the partition opening (67).

3. A negative ion generator with high-efficiency electrostatic isolation and elimination effect according to claim 1 or 2, characterized in that: The input power supply section (10) includes a dual-tube oscillation module (1), a transformer T1, a rectifier and filter module (2), and a voltage regulator module (3). The dual-tube oscillation module (1) receives DC voltage through an input wire (61) and inverts the DC voltage. The primary side of the transformer T1 is connected to the output terminal of the dual-tube oscillation module (1). The secondary side of the transformer T1 is connected to the input terminal of the rectifier and filter module (2). The output terminal of the rectifier and filter module (2) is connected to the input terminal of the voltage regulator module (3), and the output terminal of the voltage regulator module (3) is connected to the input terminal of the power conversion section (11).

4. A negative ion generator with high-efficiency electrostatic isolation and elimination effect according to claim 3, characterized in that: The dual-tube oscillation module (1) includes an electrostatic discharge protection tube (ESD1), which is connected to the positive and negative terminals of the input terminal of the dual-tube oscillation module (1).

5. A negative ion generator with high-efficiency electrostatic isolation and elimination effects according to claim 4, characterized in that: The voltage regulator module (3) includes an electrostatic discharge protection tube (ESD2), which is connected to the positive and negative terminals of the output terminal of the voltage regulator module (3).

6. A negative ion generator with high-efficiency electrostatic isolation and elimination effect according to claim 5, characterized in that: The dual-transistor oscillation module (1) also includes transistors Q1 and Q2, capacitor C1, and resistor R1; the primary side of transformer T1 is provided with lead-out terminals P1, P2, P3, P4, P5, and P6; the positive terminal of the input of the dual-transistor oscillation module (1) is connected to lead-out terminal P2, and then connected to the negative terminal of the input of the dual-transistor oscillation module (1) after passing through electrostatic discharge protection tube ESD1 and capacitor C1; the positive terminal of the input of the dual-transistor oscillation module (1) is also connected to lead-out terminal P5 after passing through resistor R1; the emitters of transistors Q1 and Q2 are both grounded; the collector of transistor Q1 is connected to lead-out terminal P1; the base of transistor Q1 is connected to lead-out terminal P4; the collector of transistor Q2 is connected to lead-out terminal P3; and the base of transistor Q2 is connected to lead-out terminal P6. The rectifier and filter module (2) includes diodes D1, D2, D3, D4, capacitor C2, and capacitor C3; the anode of diode D1 is connected to one end of the secondary side of transformer T1; the cathode of diode D1 is connected to the cathode of diode D2; the anode of diode D2 is connected to the cathode of diode D3; the cathode of diode D3 is connected to the other end of the secondary side of transformer T1; the anode of diode D3 is connected to the anode of diode D4; the cathode of diode D4 is connected to the anode of diode D1; capacitors C2 and C3 are connected in parallel; one end of capacitor C2 is connected to the cathode of diode D1; the other end of capacitor C2 is connected to the anode of diode D4; and capacitor C3 is connected to the voltage regulator module (3). The voltage regulator module (3) includes a voltage regulator chip U, a capacitor C4 and a capacitor C5; the capacitors C4, C5 and the electrostatic discharge protection tube ESD2 are connected in parallel in sequence, the input terminal of the voltage regulator chip U is connected to the output terminal of the rectifier filter module (2), and the output terminal of the voltage regulator chip U is connected to the positive and negative terminals of the output terminal of the voltage regulator module (3) after passing through the capacitors C4, C5 and ESD2.

7. A negative ion generator with high-efficiency electrostatic isolation and elimination effect according to claim 1 or 2, characterized in that: The power conversion section (11) includes a self-excited oscillation circuit module (4) and a transformer U1. The output terminal of the voltage regulator module (3) of the input power supply section (10) is connected to the input terminal of the self-excited oscillation circuit module (4). The output terminal of the self-excited oscillation circuit module (4) is connected to the primary side of the transformer U1. Thus, the power conversion section (11) transforms the low voltage output of the voltage regulator module (3) into AC high voltage output through the secondary side of the transformer U1 after being boosted by the transformer U1 via the self-excited oscillation circuit module (4).

8. A negative ion generator with high-efficiency electrostatic isolation and elimination effect according to claim 7, characterized in that: The self-excited oscillation circuit module (4) includes resistors R2, R3, and R4, capacitors C6, C7, C8, and C9, and transistor Q3; the primary side of the transformer U1 is provided with lead-out terminals E1, E2, E3, E4, and E5; the positive terminal of the input terminal of the self-excited oscillation circuit module (4) is connected to lead-out terminal E5 of the transformer U1 after passing through resistor R2, and is also connected to the negative terminal of the input terminal of the self-excited oscillation circuit module (4) after passing through capacitor C6; Resistor R3 is connected in series with resistor R4, capacitor C8 is connected in parallel with resistor R4, and the other end of resistor R3 is connected to the base of transistor Q3 and then to the negative terminal of the input terminal of self-excited oscillation circuit module (4) after passing through capacitor C7. The other end of resistor R4 is connected to the lead-out terminal E4 of transformer U1. The lead-out terminal E2 of transformer U1 is connected to the negative terminal of the input terminal of the self-excited oscillation circuit module (4). The lead-out terminal E1 of transformer U1 is connected to the collector of transistor Q3 and then connected to the negative terminal of the input terminal of the self-excited oscillation circuit module (4) after passing through capacitor C9. The emitter of transistor Q3 is connected to the negative terminal of the input terminal of the self-excited oscillation circuit module (4).

9. A negative ion generator with high-efficiency electrostatic isolation and elimination effect according to claim 7, characterized in that: The multi-stage voltage multiplier rectifier section (12) further includes a voltage multiplier rectifier circuit module (5). The secondary side of the transformer U1 is connected to the input terminal of the voltage multiplier rectifier circuit module (5). The AC high voltage output by the transformer U1 is converted into the required DC negative high voltage after passing through the voltage multiplier rectifier circuit module (5).

10. A negative ion generator with high-efficiency electrostatic isolation and elimination effect according to claim 9, characterized in that: The rectifier voltage multiplier circuit module (5) includes diode U2, diode U3, capacitor C10, capacitor C11, resistor R5 and resistor R6; the secondary side of the transformer U1 is provided with lead-out terminal E6 and lead-out terminal E7. The lead-out terminal E6 of the secondary side of transformer U1, diode U2, diode U3 and resistor R6 are connected in sequence and then connected to one of the output wires (62) so that the conductive tip (63) connected to the end of the wire is used as the negative high voltage electrode. The positive terminal of diode U2 is connected to the negative terminal of diode U3, and the two ends of capacitor C11 are connected to the negative terminal of diode U2 and the positive terminal of diode U3 respectively. The lead-out terminal E7 of the secondary side of transformer U1 is connected to resistor R5 and then to another output wire (62), so that the conductive tip (63) connected to its end is used as the opposite electrode. It is also connected to the positive terminal of diode U2 and the negative terminal of diode U3 after passing through capacitor C10.

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