Electrostatic isolation and elimination circuit of negative ion generator

Abstract

The utility model provides an electrostatic isolation and elimination circuit of a negative ion generator, which comprises an input power supply part, and the input power supply part comprises a double-tube oscillation module, a transformer T1, a rectification filtering module and a voltage stabilization module. The double-tube oscillation module is used for inputting direct-current voltage and inverting the direct-current voltage; the primary side of the transformer T1 is connected with the output end of the double-tube oscillation module; the secondary side of the transformer T1 is connected with the input end of the rectifying and filtering module; the output end of the rectifying and filtering module is connected with the input end of the voltage stabilizing module; the device is characterized in that the double-tube oscillation module comprises an electrostatic discharge protection tube ESD1, and the electrostatic discharge protection tube ESD1 is connected with the positive electrode and the negative electrode of the input end of the double-tube oscillation module. According to the technical scheme of static isolation and static elimination, the working stability of the negative ion generator is enhanced, and meanwhile, the stability and safety of a product control circuit and a power grid system applying the negative ion generator are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to air purification field, concretely is a static electricity isolation and elimination circuit of negative ion generator. BACKGROUND

[0002] The air purifier with negative ion function usually generates air negative ions through the negative ion generator. The negative ion generator is a device for generating air negative ions. The device converts the input DC or AC power into AC high voltage through a shock circuit and a full-coupled transformer, and then obtains DC high voltage through a rectifier filter circuit. The DC high voltage negative high voltage obtained by doubling the negative high voltage is used as the negative high voltage electrode. The positive electrode of the DC high voltage is used as the opposite electrode with respect to the negative high voltage electrode, and a negative high voltage difference is formed between the two.

[0003] The negative high voltage electrode is connected to a release tip made of conductive materials such as metal or carbon elements. The release tip generates high corona ionization of air using DC high voltage, and releases a large number of electrons (e-) into the air at high speed. The electrons combine with oxygen and other substances in the air to form air negative ions. The opposite electrode is connected to a release tip made of conductive materials such as metal or carbon elements, and forms a pressure difference ionization of air with the negative high voltage electrode. After recovering electrons (e-) from the air, a loop is formed in the circuit of the negative ion generator device. Since most of the electrons (e-) released by the negative high voltage electrode enter the air to form negative ions, and the opposite electrode can recover fewer electrons (e-) from the air than the negative high voltage electrode, a large amount of positive charge static electricity accumulates in the circuit.

[0004] The DC boost circuit of the negative ion generator commonly used at present uses a simple self-excited shock circuit and a ferrite high-voltage transformer to complete the boost. The ferrite high-voltage transformer has the advantages of small size and high conversion efficiency. In order to obtain higher concentration of negative ions, the DC high voltage of the negative high voltage electrode is usually increased. However, as the voltage increases, the concentration of negative ions increases, and the amount of positive charge static electricity generated at the high voltage end increases, which causes interference to the primary circuit or through the primary circuit to interfere with the control circuit. The control circuit interfered by static electricity may malfunction or be damaged. Even the accumulated static electricity may be conducted to the power supply system through the power supply line of the negative ion generator, affecting the normal operation of the entire system. SUMMARY

[0005] The utility model aims at the above-mentioned deficiencies in the prior art, and provides a static electricity isolation and elimination circuit of negative ion generator.

[0006] The utility model can achieve the purpose by the following technical scheme:

[0007] The electrostatic isolation and elimination circuit of the negative ion generator comprises an input power supply part, which comprises a double-tube oscillation module, a transformer T1, a rectifier filter module and a voltage stabilizing module; the double-tube oscillation module is used for inputting DC voltage and inverting the DC voltage; the primary side of the transformer T1 is connected with the output end of the double-tube oscillation module; the secondary side of the transformer T1 is connected with the input end of the rectifier filter module; the output end of the rectifier filter module is connected with the input end of the voltage stabilizing module; characterized in that the double-tube oscillation module comprises an electrostatic discharge protection tube ESD1, which is connected with the positive and negative poles of the input end of the double-tube oscillation module.

[0008] The optimization scheme, the voltage stabilizing module comprises an electrostatic discharge protection tube ESD2, which is connected with the positive and negative poles of the output end of the voltage stabilizing module.

[0009] Further, the double-tube oscillation module comprises a triode Q1, a triode Q2, a capacitor C1 and a resistor R1; the primary side of the transformer T1 is provided with leading-out ends P1, P2, P3, P4, P5 and P6; the positive pole of the input end of the double-tube oscillation module is connected with the leading-out end P2, and is connected with the negative pole of the input end of the double-tube oscillation module after passing through the electrostatic discharge protection tube ESD1 and the capacitor C1 in sequence; the positive pole of the input end of the double-tube oscillation module is further connected with the leading-out end P5 after passing through the resistor R1; the emitter of the triode Q1 and the emitter of the triode Q2 are grounded; the collector of the triode Q1 is connected with the leading-out end P1; the base of the triode Q1 is connected with the leading-out end P4; the collector of the triode Q2 is connected with the leading-out end P3; and the base of the triode Q2 is connected with the leading-out end P6.

[0010] In the above scheme, the triode Q1 and the triode Q2 are further both NPN triodes.

[0011] Further, the rectifier filter module comprises diodes D1, D2, D3 and D4, capacitors C2 and C3; the positive pole of the diode D1 is connected with one end of the secondary side of the transformer T1; the negative pole of the diode D1 is connected with the negative pole of the diode D2; the positive pole of the diode D2 is connected with the negative pole of the diode D3; the negative pole of the diode D3 is connected with the other end of the secondary side of the transformer T1; the positive pole of the diode D3 is connected with the positive pole of the diode D4; the negative pole of the diode D4 is connected with the positive pole of the diode D1; the capacitors C2 and C3 are connected in parallel; one end of the capacitor C2 is connected with the negative pole of the diode D1; the other end of the capacitor C2 is connected with the positive pole of the diode D4; and the capacitor C3 is connected with the voltage stabilizing module.

[0012] Further, the voltage stabilizing module further comprises a voltage stabilizing chip U, a capacitor C4 and a capacitor C5; the capacitor C4, the capacitor C5 and an electrostatic discharge protection tube ESD2 are connected in parallel in sequence, an input end of the voltage stabilizing chip U is connected with an output end of the rectifying and filtering module; and an output end of the voltage stabilizing chip U is connected with the positive and negative poles of the output end of the voltage stabilizing module after passing through the capacitor C4, the capacitor C5 and the electrostatic discharge protection tube ESD2.

[0013] In the optimization scheme, the power conversion part further comprises a self-oscillation circuit module and a transformer U1, an output end of the voltage stabilizing module of the input power supply part is connected to an input end of the self-oscillation circuit module, and an output end of the self-oscillation circuit module is connected to a primary side of the transformer U1, so that the power conversion part converts the low voltage at the output end of the voltage stabilizing module into an alternating high voltage through the self-oscillation circuit module and the transformer U1.

[0014] In the further optimization scheme, the self-oscillation circuit module comprises a resistor R2, a resistor R3, a resistor R4, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9 and a triode Q3, the primary side of the transformer U1 is provided with an outgoing end E1, an outgoing end E2, an outgoing end E3, an outgoing end E4 and an outgoing end E5, and the positive pole of the input end of the self-oscillation circuit module is connected to the outgoing end E5 of the transformer U1 after passing through the resistor R2.

[0015] The resistor R3 and the resistor R4 are connected in series, the capacitor C8 and the resistor R4 are connected in parallel, one end of the resistor R3 is connected to the base of the triode Q3, and the other end of the resistor R3 is connected to the negative pole of the input end of the self-oscillation circuit module after passing through the capacitor C7, and the other end of the resistor R4 is connected to the outgoing end E4 of the transformer U1.

[0016] The outgoing end E2 of the transformer U1 is connected to the negative pole of the input end of the self-oscillation circuit module, the outgoing end E1 of the transformer U1 is connected to the collector of the triode Q3, the emitter of the triode Q3 is connected to the negative pole of the input end of the self-oscillation circuit module after passing through the capacitor C9, and the triode Q3 is connected to the negative pole of the input end of the self-oscillation circuit module.

[0017] In the further optimization scheme, the utility model further comprises a multi-stage voltage multiplication rectification part, the multi-stage voltage multiplication rectification part further comprises a rectification voltage multiplication circuit module, the secondary side of the transformer U1 is connected with the input end of the rectification voltage multiplication circuit module, and the alternating high voltage output by the transformer U1 is converted into the required direct current negative high voltage after passing through the rectification voltage multiplication circuit module.

[0018] Further, the rectifier voltage doubling circuit module comprises 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 end E6 and lead-out end E7.

[0019] The lead-out end E6 of the secondary side of the transformer U1, diode U2, diode U3 and resistor R6 are connected in sequence and then connected to the negative high-voltage electrode of the negative ion generator, wherein the positive electrode of diode U2 is connected to the negative electrode of diode U3, and the two ends of capacitor C11 are respectively connected to the negative electrode of diode U2 and the positive electrode of diode U3.

[0020] The lead-out end E7 of the secondary side of the transformer U1 is connected to the opposite electrode of the negative ion generator after passing through resistor R5, and is connected to the positive electrode of diode U2 and the negative electrode of diode U3 after passing through capacitor C10.

[0021] The utility model has the following substantial characteristics and progress:

[0022] 1. The utility model discloses an input power supply part, a power conversion part for converting into an alternating high voltage through a double-tube oscillation module and a transformer and a multi-stage voltage doubling rectification part.

[0023] 2. The high-voltage transformer of the utility model adopts independent coils for the primary and secondary sides, and there is no electrical connection between them, and only energy transmission is realized through magnetic field coupling of a ferrite magnetic core.

[0024] 3. Since static electricity can accumulate on the surface of the negative ion generator, the utility model further eliminates the static electricity conduction hidden danger by connecting ESD static electricity discharge protection tubes in parallel at the positive and negative input ends and the positive and negative output ends of the input power supply part.

[0025] 4. The technical scheme of static electricity isolation and elimination of the utility model strengthens the working stability of the negative ion generator and guarantees the stability and safety of the product control circuit and power grid system using the negative ion generator. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the circuit diagram of the input power supply part in the utility model.

[0027] Figure 2 The circuit diagram of the power conversion part and the multi-stage voltage multiplication rectification part in the utility model. DETAILED DESCRIPTION

[0028] The utility model will be further described below with reference to the drawings. EMBODIMENT

[0029] REFERENCE Figure 1 An electrostatic isolation and elimination circuit of a negative ion generator, comprising an input power supply part.

[0030] The input power supply part further comprises a double-tube oscillation module 1, a transformer T1, a rectification and filtering module 2, and a voltage stabilizing module 3; the double-tube oscillation module 1 is used for inputting a direct current voltage and inverting the direct current voltage; the primary side of the transformer T1 is connected with the output end of the double-tube oscillation module 1; the secondary side of the transformer T1 is connected with the input end of the rectification and filtering module 2; the output end of the rectification and filtering module 2 is connected with the input end of the voltage stabilizing module 3.

[0031] The double-tube oscillation module 1 comprises an electrostatic discharge protection tube ESD1, which is connected with the positive and negative poles of the input end of the double-tube oscillation module 1.

[0032] In the above circuit structure, the electrostatic discharge protection tube ESD1 provides the first electrostatic protection barrier for the circuit, and the input end of the double-tube oscillation module 1, that is, the input end of the input power supply part, realizes electrostatic protection for the circuit, effectively preventing the circuit from being damaged or the performance from being reduced due to electrostatic discharge (ESD) events.

[0033] Further, in the embodiment, the voltage stabilizing module 3 comprises an electrostatic discharge protection tube ESD2, which is connected with the positive and negative poles of the output end of the voltage stabilizing module 3. In the above circuit structure, the electrostatic discharge protection tube ESD2 provides the second electrostatic protection barrier for the circuit, and the output end of the voltage stabilizing module 3, that is, the output end of the input power supply part, realizes electrostatic protection for the circuit, thereby strengthening the prevention of the circuit from being damaged or the performance from being reduced due to electrostatic discharge (ESD) events.

[0034] Further, the double-tube oscillation module 1 specifically comprises a triode Q1, a triode Q2, a capacitor C1 and a resistor R1; the primary side of the transformer T1 is provided with leading-out ends P1, P2, P3, P4, P5 and P6; the positive pole of the input end of the double-tube oscillation module 1 is connected with the leading-out end P2, and the negative pole of the input end of the double-tube oscillation module 1 is connected after passing through the electrostatic discharge protection tube ESD1 and the capacitor C1 in sequence; the positive pole of the input end of the double-tube oscillation module 1 is further connected with the leading-out end P5 after passing through the resistor R1; the emitter of the triode Q1 and the emitter of the triode Q2 are grounded; the collector of the triode Q1 is connected with the leading-out end P1; the base of the triode Q1 is connected with the leading-out end P4; the collector of the triode Q2 is connected with the leading-out end P3; and the base of the triode Q2 is connected with the leading-out end P6. In the embodiment, the triode Q1 and the triode Q2 specifically adopt NPN triodes.

[0035] In the above structure, the 12V direct current power source enters from the input end of the double-tube oscillation module 1, and a positive feedback oscillation circuit is formed by the triode Q1, the triode Q2 and the capacitor C1 in cooperation with the primary side of the transformer T, so as to rapidly perform inversion and oscillation processing on the input 12V direct current power source.

[0036] Further, the rectification and filtering module 2 comprises diodes D1, D2, D3, D4, a capacitor C2 and a capacitor C3; the positive pole of the diode D1 is connected with one end of the secondary side of the transformer T1; the negative pole of the diode D1 is connected with the negative pole of the diode D2; the positive pole of the diode D2 is connected with the negative pole of the diode D3; the negative pole of the diode D3 is connected with the other end of the secondary side of the transformer T1; the positive pole of the diode D3 is connected with the positive pole of the diode D4; the negative pole of the diode D4 is connected with the positive pole of the diode D1; the capacitor C2 and the capacitor C3 are connected in parallel; one end of the capacitor C2 is connected with the negative pole of the diode D1; the other end of the capacitor C2 is connected with the positive pole of the diode D4; and the capacitor C3 is connected with the voltage stabilizing module 3.

[0037] In the above structure, the bridge rectification circuit composed of the four diodes can effectively rectify the alternating current of the secondary side of the transformer T1, and the capacitor C2 and the capacitor C3 can perform filtering processing on the rectified alternating current.

[0038] Further, the voltage stabilizing module 3 further comprises a voltage stabilizing chip U, a capacitor C4 and a capacitor C5; the capacitor C4, the capacitor C5 and the electrostatic discharge protection tube ESD2 are connected in parallel in sequence; the input end of the voltage stabilizing chip U is connected with the output end of the rectification and filtering module 2; and the output end of the voltage stabilizing chip U is connected with the positive and negative poles of the output end of the voltage stabilizing module 3 after passing through the capacitor C4, the capacitor C5 and the electrostatic discharge protection tube ESD2.

[0039] The input power supply part of the embodiment first connects the input end of the double-tube oscillation module 1 with the 12V DC power supply outside, and the 12V DC power supply is inverted by the double-tube oscillation module 1 and cooperates with the primary side of the transformer T1 to generate high-frequency AC power, which is then connected to the input end of the voltage stabilizing module 3 through the secondary side of the transformer T1 after magnetic field induction. The voltage stabilizing module 3 outputs stable 12V DC voltage after voltage stabilization, which is then provided to the power supply of the negative ion generator, or can be further optimized by the power conversion part described below and then provided to the power supply of the negative ion generator. At the same time, the electrostatic discharge protection tube ESD1 and the electrostatic discharge protection tube ESD2 are cooperated to achieve electrostatic protection for the circuit from the input end and the output end of the input power supply part, respectively, to provide multiple electrostatic protection barriers for the circuit and effectively prevent circuit damage or performance degradation caused by electrostatic discharge (ESD) events. Embodiment

[0040] Reference Figure 2 The electrostatic isolation and elimination circuit of the negative ion generator of the embodiment differs from that of embodiment 1 in that the embodiment further includes a power conversion part.

[0041] The power conversion part further includes a self-oscillation circuit module 4 and a transformer U1, and the output end of the voltage stabilizing module 3 of the input power supply part is connected to the input end of the self-oscillation circuit module 4, and the output end of the self-oscillation circuit module 4 is connected to the primary side of the transformer U1, so that the power conversion part converts the low voltage at the output end of the voltage stabilizing module 3 into AC high voltage through the self-oscillation circuit module 4 and the transformer U1.

[0042] Further, the self-oscillation circuit module 4 includes a resistor R2, a resistor R3, a resistor R4, a capacitor C6, a capacitor C7, a capacitor C8, a capacitor C9, and a triode Q3; the primary side of the transformer U1 is provided with an output end E1, an output end E2, an output end E3, an output end E4, and an output end E5; the positive pole of the input end of the self-oscillation circuit module 4 is connected to the output end E5 of the transformer U1 after passing through the resistor R2, and is connected to the negative pole of the input end of the self-oscillation circuit module 4 after passing through the capacitor C6.

[0043] The resistor R3 and the resistor R4 are connected in series, the capacitor C8 and the resistor R4 are connected in parallel, one end of the resistor R3 is connected to the base of the triode Q3, and the other end of the resistor R3 is connected to the negative pole of the input end of the self-oscillation circuit module 4 after passing through the capacitor C7, and the other end of the resistor R4 is connected to the output end E4 of the transformer U1.

[0044] The output end E2 of the transformer U1 is connected to the negative input end of the self-oscillation circuit module 4, the output end E1 of the transformer U1 is connected to the collector of the triode Q3, and the emitter of the triode Q3 is connected to the negative input end of the self-oscillation circuit module 4.

[0045] In the above circuit structure, (1) the direct current VCC voltage of the power conversion part is connected to the output end E5 of the transformer U1 through the resistor R2 in the circuit, and the resistor R2 functions as a current limiter and a voltage transient impact protector. (2) The C6 is a filter capacitor, and the capacitor C8, the resistor R4, the resistor R3, and the capacitor C7 are connected to form an oscillation feedback circuit. (3) One end of the capacitor C7 is connected to the IN GND, and the other end is connected to the resistor R3 and the base of the triode Q3. When the capacitor C7 is charged, it belongs to low voltage, and the triode Q3 is in cut-off state. When the capacitor C7 is fully charged, it meets the state of the triode Q3 being turned on, and the capacitor C7 is discharged, and the triode Q3 is turned on through the base of the triode Q3, and the process is repeated.

[0046] Further, the embodiment further includes a multi-stage voltage doubling rectification part, and the multi-stage voltage doubling rectification part further includes a rectification voltage doubling circuit module 5. The secondary side of the transformer U1 is connected to the input end of the rectification voltage doubling circuit module 5, and the alternating current high voltage output by the transformer U1 is converted into the required direct current negative high voltage through the rectification voltage doubling circuit module 5.

[0047] The rectification voltage doubling circuit module 5 specifically includes a diode U2, a diode U3, a capacitor C10, a capacitor C11, a resistor R5, and a resistor R6. The secondary side of the transformer U1 is provided with an output end E6 and an output end E7. The output end E6 of the secondary side of the transformer U1, the diode U2, the diode U3, and the resistor R6 are sequentially connected and then connected to the negative high voltage electrode of the negative ion generator. The anode of the diode U2 is connected to the cathode of the diode U3, and the two ends of the capacitor C11 are respectively connected to the cathode of the diode U2 and the anode of the diode U3. The output end E7 of the secondary side of the transformer U1 is connected to the opposite electrode of the negative ion generator through the resistor R5, and is connected to the anode of the diode U2 and the cathode of the diode U3 through the capacitor C10.

[0048] In the above circuit structure, the output end of the rectification voltage doubling circuit module 5 is connected to the release tip made of conductive substances such as metal or carbon elements, and then forms the negative high voltage electrode and the opposite electrode, respectively. A high voltage difference ionized air is formed between the two electrodes, and a high concentration of air negative ions is generated.

Claims

1. An electrostatic isolation and elimination circuit of a negative ion generator, comprising an input power supply part, which in turn comprises a double-tube oscillation module (1), a transformer T1, a rectification and filtering module (2) and a voltage stabilization module (3); the double-tube oscillation module (1) is used for inputting a direct current voltage and inverting the direct current voltage; the primary side of the transformer T1 is connected with the output end of the double-tube oscillation module (1); the secondary side of the transformer T1 is connected with the input end of the rectification and filtering module (2); the output end of the rectification and filtering module (2) is connected with the input end of the voltage stabilization module (3); characterized in that: The double-tube oscillation module (1) comprises an electrostatic discharge protection tube ESD1 connected with the positive and negative poles of the input end of the double-tube oscillation module (1).

2. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 1, characterized by: The voltage stabilizing module (3) comprises an electrostatic discharge protection tube ESD2 connected with the positive and negative poles of the output end of the voltage stabilizing module (3).

3. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 1 or 2, characterized in that: The double-tube oscillation module (1) comprises a triode Q1, a triode Q2, a capacitor C1 and a resistor R1; the primary side of the transformer T1 is provided with leading-out ends P1, P2, P3, P4, P5 and P6; the positive pole of the input end of the double-tube oscillation module (1) is connected with the leading-out end P2, and the negative pole of the input end of the double-tube oscillation module (1) is connected after passing through the electrostatic discharge protection tube ESD1 and the capacitor C1 in sequence; the positive pole of the input end of the double-tube oscillation module (1) is further connected with the leading-out end P5 after passing through the resistor R1; the emitter of the triode Q1 and the emitter of the triode Q2 are grounded; the collector of the triode Q1 is connected with the leading-out end P1; the base of the triode Q1 is connected with the leading-out end P4; the collector of the triode Q2 is connected with the leading-out end P3; and the base of the triode Q2 is connected with the leading-out end P6.

4. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 3, characterized by: The triode Q1 and the triode Q2 are both NPN triodes.

5. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 1 or 2, characterized by: The rectification and filtering module (2) comprises diodes D1, D2, D3, D4, capacitors C2 and C3; the positive pole of the diode D1 is connected with one end of the secondary side of the transformer T1; the negative pole of the diode D1 is connected with the negative pole of the diode D2; the positive pole of the diode D2 is connected with the negative pole of the diode D3; the negative pole of the diode D3 is connected with the other end of the secondary side of the transformer T1; the positive pole of the diode D3 is connected with the positive pole of the diode D4; the negative pole of the diode D4 is connected with the positive pole of the diode D1; the capacitor C2 and the capacitor C3 are connected in parallel; one end of the capacitor C2 is connected with the negative pole of the diode D1; the other end of the capacitor C2 is connected with the positive pole of the diode D4; and the capacitor C3 is connected with the voltage stabilizing module (3).

6. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 2, characterized by: The voltage stabilizing module (3) further comprises a voltage stabilizing chip U, a capacitor C4 and a capacitor C5; the capacitor C4, the capacitor C5 and the electrostatic discharge protection tube ESD2 are connected in parallel in sequence; the input end of the voltage stabilizing chip U is connected with the output end of the rectification and filtering module (2); and the output end of the voltage stabilizing chip U is connected with the positive and negative poles of the output end of the voltage stabilizing module (3) after passing through the capacitor C4, the capacitor C5 and the electrostatic discharge protection tube ESD2.

7. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 1 or 2, characterized by: The power conversion part further comprises a self-oscillation circuit module (4) and a transformer U1; the output end of the voltage stabilizing module (3) of the input power supply part is connected with the input end of the self-oscillation circuit module (4), and the output end of the self-oscillation circuit module (4) is connected with the primary side of the transformer U1, so that the power conversion part converts the low voltage of the output end of the voltage stabilizing module (3) into an alternating high voltage output through the self-oscillation circuit module (4) and the transformer U1.

8. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 7, characterized by: The self-oscillating circuit module (4) comprises resistors R2, R3, R4, capacitors C6, C7, C8, C9 and a transistor Q3; the primary side of the transformer U1 is provided with leading-out ends E1, E2, E3, E4 and E5; the positive pole of the input end of the self-oscillating circuit module (4) is connected to the leading-out end E5 of the transformer U1 via the resistor R2, and is connected to the negative pole of the input end of the self-oscillating circuit module (4) via the capacitor C6; The resistor R3 is connected in series with the resistor R4, and the capacitor C8 is connected in parallel with the resistor R4; one end of the resistor R3 is connected to the base of the transistor Q3, and the other end of the resistor R3 is connected to the negative pole of the input end of the self-oscillating circuit module (4) via the capacitor C7; the other end of the resistor R4 is connected to the leading-out end E4 of the transformer U1; The leading-out end E2 of the transformer U1 is connected to the negative pole of the input end of the self-oscillating circuit module (4); one end of the leading-out end E1 of the transformer U1 is connected to the collector of the transistor Q3, and the other end of the leading-out end E1 of the transformer U1 is connected to the negative pole of the input end of the self-oscillating circuit module (4) via the capacitor C9; the emitter of the transistor Q3 is connected to the negative pole of the input end of the self-oscillating circuit module (4).

9. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 7, characterized by: The multi-stage voltage-boosting rectification part further comprises a rectification voltage-boosting circuit module (5); the secondary side of the transformer U1 is connected to the input end of the rectification voltage-boosting circuit module (5); the alternating-current high voltage output by the transformer U1 is converted into the required direct-current negative high voltage by the rectification voltage-boosting circuit module (5).

10. The electrostatic isolation and elimination circuit of a negative ion generator according to claim 9, characterized by: The rectification voltage-boosting circuit module (5) comprises diodes U2, U3, capacitors C10, C11, resistors R5 and R6; the secondary side of the transformer U1 is provided with leading-out ends E6 and E7; The leading-out end E6 of the secondary side of the transformer U1, the diodes U2 and U3 and the resistor R6 are connected in sequence and then connected to the negative high voltage electrode of the negative ion generator; the positive pole of the diode U2 is connected to the negative pole of the diode U3, and the two ends of the capacitor C11 are respectively connected to the negative pole of the diode U2 and the positive pole of the diode U3; The leading-out end E7 of the secondary side of the transformer U1 is connected to the opposite electrode of the negative ion generator via the resistor R5, and is connected to the positive pole of the diode U2 and the negative pole of the diode U3 via the capacitor C10.

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