Negative oxygen ion generator and method thereof

Abstract

The invention relates to the technical field of air purification, and discloses a negative oxygen ion generator and a method thereof.The negative oxygen ion generator comprises an external shell used for providing installation positions for related parts; the power supply input module is mounted in the external shell, is internally provided with a filtering unit, and is used for receiving external direct current; the direct current and alternating current inversion module is electrically connected with the output end of the power supply input module, is internally provided with a switch assembly and is used for converting the direct current into high-frequency alternating current; a primary winding, a secondary winding and a feedback winding are arranged in the boosting transformer. A boosting transformer is arranged between a direct current and alternating current inversion module and a high-voltage double-voltage rectification module, so that the voltage is effectively boosted, more importantly, the magnetic field coupling characteristics of a primary winding and a secondary winding are utilized, reliable electrical isolation is constructed, and a physical path from a high-voltage side circuit to a low-voltage side circuit is blocked.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air purification, in particular to a negative oxygen ion generator and a method thereof. BACKGROUND

[0002] Negative oxygen ions, because they can combine with dust, smoke and other particulate matters in the air to make them settle down, and have certain biological activity, are known as air vitamins. Therefore, the negative oxygen ion generator capable of artificially generating negative oxygen ions in a specific space has become a core functional component in air purifiers, air conditioners, vehicle-mounted devices and other healthy home appliances, and has been widely applied in the technical field.

[0003] The basic principle of the negative oxygen ion generator in the prior art is usually to transform the input low-voltage direct current through a series of circuits to a negative high voltage sufficient to ionize the air, and apply it to the emission end to generate negative oxygen ions. However, in the specific implementation scheme, the prior art still has some inherent defects. In order to pursue the simplification of the circuit and the control of the cost, a considerable part of the generators adopts a non-isolated circuit topology, for example, uses a self-coupled transformer or directly drives a voltage doubler network by an oscillation circuit. There is a direct electrical connection between the input low-voltage circuit and the output high-voltage circuit of this kind of scheme, which lacks effective electrical isolation. This constitutes a significant safety hazard. Once an abnormality occurs on the high-voltage side, the high-voltage current is likely to be reversed to the low-voltage control system through the shared circuit path, causing irreversible damage to the precise core chips or display screens of the main equipment.

[0004] In addition, in order to realize stable ion generation, accurate control of the discharge process is also crucial. The prior art has not fully considered how to maintain continuous and efficient corona discharge. Some schemes lack measures to effectively limit the discharge current, which makes the discharge process unstable, and even in some working conditions, it jumps to arc discharge with huge energy consumption and almost no ion generation. This not only reduces the ion output efficiency, but also accelerates the aging and damage of the emission end, affecting the overall reliability and service life of the product. At the same time, in the specific selection of the ion emission end, the traditional design relies on a single or a few metal needle tips for discharge, and the density and total amount of ion output are limited by the limited discharge points, which has encountered a bottleneck in improving the ion generation efficiency per unit volume. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a negative oxygen ion generator and a method thereof, which solves the problems of low safety and reliability due to the lack of electrical isolation, and low ion generation efficiency due to unstable discharge process, which are common in the circuit scheme of the existing negative oxygen ion generator.

[0006] To achieve the above object, the present application is implemented by the following technical solutions: a negative oxygen ion generator and a method thereof, comprising:

[0007] An external shell is used to provide mounting positions for related components;

[0008] A power input module is mounted inside the external shell and internally provided with a filter unit, used to receive external direct current;

[0009] A direct current and alternating current inversion module is electrically connected with the output end of the power input module and internally provided with a switch assembly, used to convert the direct current into high-frequency alternating current;

[0010] A step-up transformer is internally provided with a primary winding, a secondary winding and a feedback winding, the primary winding is electrically connected with the direct current and alternating current inversion module, the secondary winding is used to output high-voltage alternating current after voltage step-up, the primary winding and the secondary winding are electrically isolated through magnetic field coupling, and the feedback winding is connected with the switch assembly to maintain oscillation;

[0011] A high-voltage voltage doubler rectifier module comprises a plurality of diodes and capacitors, the high-voltage voltage doubler rectifier module is electrically connected with the secondary winding, and is used to convert the high-voltage alternating current into high-voltage direct current;

[0012] An ion emission assembly is electrically connected with the output end of the high-voltage voltage doubler rectifier module, the ion emission assembly comprises a current limiting assembly and an ion emission end, and is used to generate negative oxygen ions under the excitation of high-voltage direct current.

[0013] A negative oxygen ion generation method comprises the following steps:

[0014] S1, receiving external provided direct current and inverting the direct current into high-frequency alternating current;

[0015] S2, voltage step-up is performed on the high-frequency alternating current through a step-up transformer, and the electrical isolation characteristics of the primary winding and the secondary winding of the step-up transformer are utilized to realize the isolation of the input circuit and the output circuit;

[0016] S3, voltage doubler rectification is performed on the high-voltage alternating current after voltage step-up to obtain high-voltage direct current;

[0017] S4, the obtained high-voltage direct current is applied to the ion emission end to ionize air to generate negative oxygen ions.

[0018] Preferably, in the step S1, the direct current is inverted into high-frequency alternating current through a self-oscillation circuit, and the self-oscillation circuit is composed of at least two switch tubes and the feedback winding of the step-up transformer.

[0019] Preferably, the self-oscillating circuit is a push-pull oscillating circuit, and the at least two switching tubes are triodes or field effect tubes.

[0020] Preferably, the step S3 is implemented by a voltage doubler rectifier circuit composed of a plurality of diodes and capacitors.

[0021] Preferably, the ion emission end is a carbon fiber brush tip, and the ionized air is generated by the carbon fiber brush tip through a controllable corona discharge effect.

[0022] Preferably, before the DC is inverted into high-frequency AC, the received DC is filtered by a filtering unit to provide a stable working voltage.

[0023] Preferably, before the obtained high-voltage DC is applied to the ion emission end, the high-voltage DC is limited by one or more current-limiting resistors to stabilize the discharge process.

[0024] Preferably, the voltage of the received DC ranges from 3V to 24V, and the voltage of the obtained high-voltage DC is -4.0KV±0.5KV.

[0025] Preferably, the stable discharge process specifically includes maintaining the discharge mode in stable corona discharge and inhibiting the transition to arc discharge.

[0026] The present application provides a negative oxygen ion generator and a method thereof.

[0027] 1. The present application sets a step-up transformer between the DC and AC inversion module and the high-voltage voltage doubler rectifier module, which not only effectively increases the voltage, but also uses the magnetic field coupling characteristics of the primary winding and the secondary winding to build a reliable electrical isolation, block the physical path of the high-voltage side circuit to the low-voltage side circuit, greatly improve the overall safety and reliability when the generator is integrated into the main device, and avoid potential damage to the main device precision control unit.

[0028] 2. The present application doubles the voltage of the high-voltage AC after boosting, obtains smooth and stable high-voltage DC, and limits the current through a current-limiting component before applying it to the ion emission end. This combination ensures that the final discharge process is stable and continuous corona discharge, rather than destructive arc discharge, thereby ensuring the efficiency and consistency of negative oxygen ion generation and prolonging the service life of the device.

[0029] 3、The carbon fiber brush is used as the ion emission end, the physical form of the carbon fiber brush containing a large number of micro fiber tips is used, the tip effect is fully played, compared with a single discharge needle tip, the design can form a wider and higher density discharge area under the same voltage excitation, so that high efficiency and large dose of negative oxygen ions are generated, and the ion output capacity per unit volume is improved.

[0030] 4、The direct current and alternating current inversion link adopts a self-oscillation circuit scheme, the circuit does not need an external independent oscillation control chip, and only the interaction of a switching assembly and a transformer feedback winding can realize stable oscillation and high-frequency inversion, so that the overall circuit structure is greatly simplified, the number of components is reduced, and therefore, the structure is compact, the integration degree is high, and the production cost is controllable.

[0031] 5、The circuit scheme has good power supply adaptability and system compatibility, can stably work in a wide input direct current voltage range, and due to the existence of the electrical isolation characteristic, the generator can be safely and conveniently integrated into various different main devices as a functional module, without worrying about causing electrical interference to the main device, and exhibits strong universality and market applicability. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a perspective view of the present application;

[0033] Figure 2 is an internal view of the present application;

[0034] Figure 3 is a circuit diagram of the present application;

[0035] Figure 4 is a method flowchart of the present application;

[0036] Figure 5 is a flowchart of step S1 of the present application;

[0037] Figure 6 is a flowchart of step S2 of the present application;

[0038] Figure 7 is a flowchart of step S3 of the present application;

[0039] Figure 8 is a flowchart of step S4 of the present application.

[0040] Wherein, 1, external shell; 2, power input module; 3, DC-AC inverter module; 4, step-up transformer; 401, primary winding; 402, secondary winding; 403, feedback winding; 5, high-voltage voltage doubler rectifier module; 501, diode; 502, capacitor; 6, ion emission assembly; 601, current limiting assembly; 602, ion emission end. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0042] Please refer to the drawings Figure 3 - the drawings Figure 8 The present application provides a kind of green bamboo shoot preservation processing method, comprising the following steps:

[0043] S1, receiving external DC power and inverting DC power into high-frequency AC power.

[0044] In this embodiment, the step S1 for realizing the method for generating negative oxygen ions is mainly executed by the power input module and the DC-AC inverter module inside the negative oxygen ion generator.

[0045] In a specific application scenario, the power input module is responsible for physical and electrical connection with the DC power supply system of the external host device (such as an air purifier, a vehicle-mounted device or other household appliances). The external interface of this module can be designed as a wire with an industry-standard terminal (such as an SM-2P terminal) to facilitate integration and installation. The circuit design of the present application allows it to work stably within a wide range of DC voltages. In a preferred embodiment, its working voltage range can be 3V to 24V, thus showing good power adaptability.

[0046] After receiving external DC power, the DC power is not directly used for inversion, but first flows through a filter unit integrated inside the power input module. The purpose of setting this filter unit is to pre-process the input DC power to eliminate or suppress voltage ripple and high-frequency noise that may exist in it, which is generated by the external power supply itself or coupled by other circuits.

[0047] Specifically, the filter unit can be composed of one or more filter capacitors. These capacitors are connected in parallel at the input of the DC power supply, and can provide a more stable and pure working voltage for the subsequent DC-AC inverter module. An optimized filter unit is a technical prerequisite for ensuring that the subsequent self-oscillation circuit can reliably start oscillation and maintain stable operation at a preset frequency.

[0048] The stable DC voltage after filtering is then delivered to the DC-AC inverter module. This module is the first step to realize the core function of the application, and its role is to convert the input DC power into high-frequency AC power, creating conditions for subsequent voltage boosting through a transformer.

[0049] In this embodiment, the core of the DC-AC inverter module is a self-oscillation circuit. This circuit has a compact topology and can achieve stable oscillation without additional complex control chips, making it very suitable for integration into component-level products with limited space. The circuit is composed of a switching assembly and the primary winding and feedback winding of the boost transformer.

[0050] The switching assembly, preferably, is composed of at least two push-pull arranged switching tubes. These switching tubes can be bipolar junction transistors or metal oxide semiconductor field effect transistors, which are configured to alternate conduction and cutoff.

[0051] The working principle of the self-oscillation circuit is described in detail as follows:

[0052] At the moment of circuit power-on, due to the electrical characteristics of the two switching tubes (using transistors Q1 and Q2 as an example), one switching tube (for example, Q1) will preferentially obtain a weak base current and start conduction first.

[0053] With the conduction of Q1, current begins to flow through part of the primary winding of the boost transformer (T1). This changing current generates a changing magnetic flux in the transformer core, which not only induces a voltage on the secondary winding, but also induces a feedback voltage on the feedback winding.

[0054] This feedback voltage is applied to the control electrode (i.e. the base) of the two switching tubes through a carefully designed bias network (composed of elements such as resistors R1 and R2, and capacitor C4). The polarity of the feedback voltage is designed to form positive feedback on the currently conducting Q1, i.e. to further increase its base current, thereby driving it quickly into a saturated conduction state; at the same time, an inverse bias voltage is applied to the base of the other switching tube Q2, reliably maintaining it in the cutoff state.

[0055] When Q1 is fully saturated, the current through the primary winding reaches a maximum and stabilizes, at which time the magnetic flux in the transformer core no longer changes. According to Faraday's law of electromagnetic induction, the disappearance of the rate of change of magnetic flux results in the disappearance and reversal of the induced voltage on the feedback winding.

[0056] The reversal of the feedback voltage causes the base of Q1 to lose its forward bias and exit saturation and turn off, while Q2, which was previously reverse biased, now becomes forward biased and begins to conduct. Thereafter, the current flows through the other half of the primary winding, and the positive feedback and saturation process repeats.

[0057] Thus, the two switching transistors alternately switch at high frequency, like a mechanical chopper, chopping the input smooth DC into a high-frequency AC square wave current. This high-frequency AC current flows in the primary winding of the step-up transformer T1, thereby providing a high-frequency AC excitation source for the subsequent step of isolation and voltage boosting, which is in accordance with the working principle of the transformer.

[0058] S2, boosting the high-frequency AC current by using a step-up transformer, and using the electrical isolation characteristics of the primary winding and the secondary winding of the step-up transformer to achieve isolation between the input circuit and the output circuit.

[0059] In this embodiment, step S2 is the key link between the previous step and the subsequent step in the entire method of generating negative oxygen ions. This step is completely performed by the step-up transformer (T1) in the generator of the present application.

[0060] The step-up transformer physically bridges the DC and AC inverter module in the front stage and the high-voltage step-up rectifier module in the rear stage. It receives the high-frequency AC excitation generated in step S1 and converts it into a high-voltage signal with specific electrical characteristics required for the subsequent step.

[0061] Specifically, this step includes two complementary and equally important technical objectives: voltage boosting and circuit isolation.

[0062] Regarding the voltage boosting function, its implementation principle is based on Faraday's law of electromagnetic induction. In step S1, the DC and AC inverter module generates a high-frequency varying current in the primary winding of the step-up transformer T1, which in turn excites a high-frequency alternating magnetic field in the magnetic core of the transformer.

[0063] In order to effectively boost the voltage, the structure of the step-up transformer is carefully designed, with the number of turns N2 of the secondary winding being set to be much larger than the number of turns N1 of the primary winding. According to the transformer voltage transformation relationship:

[0064]

[0065] Wherein, V1 is the primary winding voltage; V2 is the secondary winding induced voltage.

[0066] Due to the turns ratio far greater than 1, the voltage induced on the secondary winding by the alternating magnetic field is also much higher than the primary voltage, thereby achieving the purpose of converting low-voltage alternating current into high-voltage alternating current. The amplitude of the voltage raised is a prerequisite for providing sufficient electric field strength for the subsequent steps S3 of rectification and step S4 of ionization process.

[0067] On the other hand, the deeper technical contribution of this step is to achieve electrical isolation. This is a core technical feature of the invention to ensure application safety and system compatibility.

[0068] In addition, there is no direct physical wire connection or conduction path between the primary winding circuit of the step-up transformer T1 (connected to the low-voltage side of the power input and the inverter module) and the secondary winding circuit (connected to the high-voltage side of the high-voltage rectification and ion emission). The transfer of energy is completely coupled through the magnetic field in the magnetic core as a medium.

[0069] The purpose of setting this electrical isolation is to fundamentally solve the safety hazards that exist universally in this technical field, especially in some non-isolated schemes. Without electrical isolation, transient or failure on the high-voltage side is extremely likely to be fed back or returned to the low-voltage side through the ground wire or other parasitic paths. This high-voltage feedback can cause permanent and irreversible damage to the precision control system of the external host device connected to it, such as the central processing unit or the liquid crystal display.

[0070] Through the electrical isolation design in this step, a solid firewall is equivalent to being built between the low-voltage control circuit and the high-voltage working circuit. It physically blocks the path of high-voltage feedback, ensuring that the negative oxygen ion generator will not cause electrical interference or pose a safety threat to the host device during integration and operation, thereby greatly improving the reliability and application range of the product.

[0071] S3, doubling the voltage of the high-voltage alternating current after the step-up to obtain high-voltage direct current.

[0072] In this embodiment, step S3 is the key processing link that accepts the high-voltage alternating signal output by step S2 and provides a qualified excitation source for the final step. This step is executed by the high-voltage voltage doubling rectification module integrated inside the generator of the invention.

[0073] The function of this module is to convert the high-frequency, high-voltage alternating current with alternating polarity from the secondary winding of the step-up transformer into a high-voltage direct current with single polarity and smooth voltage. The necessity of achieving this conversion lies in the fact that the subsequent corona discharge process requires a stable and continuous strong electric field to maintain, and the alternating electric field cannot meet this condition.

[0074] In a preferred embodiment of the present application, the high-voltage voltage- doubling rectifier module is composed of multiple diodes and capacitors in a specific cascading manner, forming a highly efficient voltage-doubling rectifier circuit. A typical topology is the Cockcroft-Walton voltage doubler. Taking a two-stage circuit that doubles the voltage as an example, its working principle can be carefully broken down as follows:

[0075] When the high-voltage AC output from the secondary winding of the step-up transformer is in its first half cycle (e.g., the negative half cycle), the first diode D1 in the circuit is turned on due to forward bias, while the second diode D2 is turned off due to reverse bias. At this time, the high-voltage AC power source charges the first capacitor C5 through the turned-on D1. At the end of this half cycle, the voltage across C5 will theoretically be charged to close to the peak value of the AC voltage, denoted as V p .

[0076] Immediately after, when the high-voltage AC enters its second half cycle (e.g., the positive half cycle), the circuit state flips. At this time, D1 is turned off due to reverse bias, while D2 is turned on due to forward bias. At this moment, the charged C5 (its voltage is V p ) acts as a temporary DC source, which is in series with the output voltage of the transformer secondary winding in this half cycle (its peak value is also V p ). The superposition of these two voltage sources charges the second capacitor C6 through the turned-on D2.

[0077] Therefore, the total voltage charging C6 is theoretically the sum of the two voltage sources. This process cleverly superimposes the voltages of the two half cycles before and after, achieving voltage doubling. For an N-stage (i.e., containing N diodes and N capacitors) Cockcroft-Walton voltage doubler, the output DC voltage V out is related to the peak value of the input AC voltage V p as follows:

[0078] V out ≈N×V p ;

[0079] In the circuit diagram of this embodiment, a two-stage structure with N = 2 is shown, so its output voltage can theoretically reach twice the input AC peak value. Through this charge-pump type of operation, the circuit not only converts AC to DC (rectification), but also further increases the absolute value of the voltage (voltage doubling).

[0080] Finally, after processing by the high-voltage voltage multiplier rectifier module, the high-frequency high-voltage AC power from step S2 is successfully converted into a stable high-voltage DC power with low ripple. This high-voltage DC power possesses all the electrical characteristics required to drive the subsequent ion emission components to generate stable corona discharge, providing a direct and qualified energy source for the efficient generation of negative oxygen ions in this invention.

[0081] S4. Apply the obtained high-voltage direct current to the ion emission end to ionize the air and generate negative oxygen ions.

[0082] In this embodiment, step S4 is the physical process by which the present invention achieves its final technical objective. This step is performed by the ion emission component at the end of the generator of the present invention, which receives the stable high-voltage direct current from step S3 and uses its energy efficiently to ionize the air.

[0083] In terms of structure, the ion emission assembly preferably includes a current limiting component and an ion emission end, which are connected in series in the discharge circuit and work together to ensure the stability, controllability and efficiency of the ion generation process.

[0084] First, the negative high-voltage DC output from the high-voltage voltage multiplier rectifier module is not directly applied to the final transmitting end, but must first flow through the aforementioned current-limiting component. The fundamental purpose of setting up this component is to actively and continuously control the discharge current to ensure that the discharge process remains in a stable corona discharge mode and to suppress its transition to an unstable and destructive arc discharge mode.

[0085] Specifically, arc discharge is a high-current, high-heat transient breakdown phenomenon that consumes a large amount of energy but produces almost no effective negative oxygen ions and may cause permanent damage to the transmitter and circuitry. In contrast, corona discharge is a low-current, relatively low-temperature, locally self-sustaining discharge, which is the ideal working state for efficiently generating negative oxygen ions. The current-limiting component in this embodiment can be composed of one or more high-resistance current-limiting resistors. The presence of these resistors greatly increases the total impedance of the discharge circuit, thereby physically limiting the maximum current that the circuit may carry. This ensures that even under certain transient conditions, the discharge current cannot reach the threshold sufficient to form an arc, thus guaranteeing the continuity and stability of the corona discharge process.

[0086] The high-voltage direct current, after being processed by the current-limiting component, is ultimately applied to the ion emission end. The geometry and material selection of this emission end play a decisive role in the ionization efficiency. One of the core design features of this invention lies in utilizing the classical principle of the tip effect.

[0087] This principle states that in a charged conductor, charge density tends to concentrate in the region of greatest curvature (i.e., the tip). This high concentration of charge generates an extremely strong electric field around the microscopic region of the tip. The strength of the electric field is related to the applied voltage and the radius of curvature of the tip. Therefore, even with a fixed macroscopic voltage, a sufficiently sharp tip can generate a local electric field in its vicinity that far exceeds the dielectric breakdown strength of air.

[0088] Based on this principle, the present invention preferably uses a carbon fiber brush as the ion emission end. Compared with a single metal needle tip, the carbon fiber brush is composed of thousands of independent, micron-sized conductive carbon fiber bundles. Each independent fiber tip constitutes an independent, highly efficient electric field concentration point and electron emission point. This array-like structure greatly increases the effective discharge area and ionization region, thereby enabling large-scale, high-density generation of negative oxygen ions within a compact volume.

[0089] When a current-limited negative high voltage is applied to the carbon fiber brush, the extremely strong electric field around its numerous tips induces a continuous negative corona discharge. During this process, the powerful electric field forces electrons... - It is pulled out from the carbon fiber guide belt and launched at high speed into the surrounding air medium.

[0090] These emitted free electrons have an extremely short lifespan in the air and immediately collide with and are captured by the abundant, electrically neutral oxygen molecules (O2) present in the air. Oxygen molecules have a high affinity for electrons; after capturing an electron, they form a relatively stable negative oxygen ion carrying one unit of negative charge. This physicochemical process can be described as follows:

[0091]

[0092] Ultimately, these generated negative oxygen ions diffuse from the generation area to a wider space under the combined effect of electric field repulsion and airflow, thus achieving the technical objective of this invention: purifying the air and providing a healthy environment. The entire step S4, through the combination of current limiting control and tip discharge, constitutes a complete and efficient physical process for converting electrical energy into chemical energy.

[0093] The negative ion generator described below and the negative ion generation method described above can be referred to in correspondence.

[0094] Please see the appendix Figure 1 and attached Figure 2 The present invention also provides a negative oxygen ion generator, comprising:

[0095] The outer casing 1 is used to provide mounting positions for related components;

[0096] The power input module 2 is installed inside the outer shell 1 and has a filter unit inside it for receiving external DC power.

[0097] The DC-AC inverter module 3 is electrically connected to the output terminal of the power input module 2 and has a switching component inside, used to convert the DC power into high-frequency AC power;

[0098] The step-up transformer 4 has a primary winding 401, a secondary winding 402, and a feedback winding 403. The primary winding 401 is electrically connected to the DC-AC inverter module 3. The secondary winding 402 is used to output the stepped-up high-voltage AC power. The primary winding 401 and the secondary winding 402 are electrically isolated by magnetic field coupling. The feedback winding 403 is connected to the switching assembly to maintain oscillation.

[0099] The high voltage multiplier rectifier module 5 includes multiple diodes 501 and capacitors 502. The high voltage multiplier rectifier module 5 is electrically connected to the secondary winding 402 and is used to convert the high voltage AC power into high voltage DC power.

[0100] The ion emission component 6 is electrically connected to the output terminal of the high voltage voltage multiplier rectifier module 5. The ion emission component 6 includes a current limiting component 601 and an ion emission terminal 602, and is used to generate negative oxygen ions under the excitation of high voltage direct current.

[0101] The device in this embodiment can be used to execute the above method embodiments, and its principle and technical effects are similar, so they will not be described again here.

[0102] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative oxygen ion generator, characterized in that, include: An outer casing (1) is used to provide mounting positions for related components; The power input module (2) is installed inside the outer shell (1) and has a filter unit inside for receiving external DC power; The DC-AC inverter module (3) is electrically connected to the output terminal of the power input module (2) and has a switching component inside, which is used to convert the DC power into high-frequency AC power. A step-up transformer (4) is provided with a primary winding (401), a secondary winding (402) and a feedback winding (403) inside. The primary winding (401) is electrically connected to the DC and AC inverter module (3). The secondary winding (402) is used to output the stepped-up high-voltage AC power. The primary winding (401) and the secondary winding (402) are electrically isolated by magnetic field coupling. The feedback winding (403) is connected to the switching assembly to maintain oscillation. The high voltage multiplier rectifier module (5) includes multiple diodes (501) and capacitors (502). The high voltage multiplier rectifier module (5) is electrically connected to the secondary winding (402) and is used to convert the high voltage AC power into high voltage DC power. An ion emission component (6) is electrically connected to the output terminal of the high voltage multiplier rectifier module (5). The ion emission component (6) includes a current limiting component (601) and an ion emission terminal (602) for generating negative oxygen ions under the excitation of high voltage direct current.

2. A method for generating negative oxygen ions according to claim 1, characterized in that, Includes the following steps: S1. Receives externally supplied DC power and inverts it into high-frequency AC power. S2. The high-frequency AC power is stepped up by a step-up transformer, and the electrical isolation characteristics of the primary and secondary windings of the step-up transformer are used to achieve isolation between the input circuit and the output circuit. S3. The boosted high-voltage AC power is rectified by voltage multiplication to obtain high-voltage DC power; S4. Apply the obtained high-voltage direct current to the ion emission end to ionize the air and generate negative oxygen ions.

3. The method for generating negative oxygen ions according to claim 2, characterized in that, In step S1, the DC power is inverted into high-frequency AC power through a self-excited oscillation circuit, which consists of at least two switching transistors and the feedback winding of the step-up transformer.

4. The method for generating negative oxygen ions according to claim 3, characterized in that, The self-excited oscillation circuit is a push-pull oscillation circuit, and at least two of the switching transistors are transistors or field-effect transistors.

5. The method for generating negative oxygen ions according to claim 2, characterized in that, In step S3, the boosted high-voltage AC power is rectified by a voltage multiplier circuit consisting of multiple cascaded diodes and capacitors.

6. The method for generating negative oxygen ions according to claim 2, characterized in that, The ion emitter is a carbon fiber brush tip, and the ionization of air is specifically achieved by a controllable corona discharge triggered by the discharge effect of the carbon fiber brush tip.

7. The method for generating negative oxygen ions according to claim 2, characterized in that, Before converting the DC power into high-frequency AC power, the received DC power is filtered by a filtering unit to provide a stable operating voltage.

8. The method for generating negative oxygen ions according to claim 2, characterized in that, Before applying the obtained high-voltage direct current to the ion emitter, the high-voltage direct current is further limited by one or more current-limiting resistors to stabilize the discharge process.

9. A method for generating negative oxygen ions according to claim 2, characterized in that, The voltage range of the received DC power is 3V to 24V, and the voltage of the obtained high-voltage DC power is -4.0KV±0.5KV.

10. A method for generating negative oxygen ions according to claim 8, characterized in that, The stable discharge process specifically includes: maintaining the discharge mode in a stable corona discharge and suppressing the transition to arc discharge.

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