Dispersion discharge plasma airflow generating device, therapeutic apparatus and using method

Abstract

The invention relates to the technical field of plasma medical treatment, in particular to a dispersion discharge plasma airflow generating device, a therapeutic apparatus and a using method, the dispersion discharge plasma airflow generating device comprises a tubular shell, the tubular shell is provided with an airflow channel, and rotating airflow is introduced into the airflow channel; the discharge electrode is located in the center of the airflow channel, and the discharge direction is the same as the airflow direction; the guide electrode is positioned at the discharge end of the discharge electrode and is arranged corresponding to the discharge electrode; when the electrodes are powered on, dispersion discharge plasmas are formed between the discharge electrodes and the guide electrodes, and the plasmas are located near the center position of the rotating airflow. According to the invention, the noise generated by irregular moving discharge of the plasma caused by the airflow is effectively avoided, and the rotary dispersion discharge sliding or frequent start and stop of the plasma caused by the airflow can also be avoided, so that the discharge noise is reduced.

Description

Technical Field

[0001] The present invention relates to the field of plasma medical technology, and in particular to a diffuse discharge plasma airflow generating device, a therapeutic apparatus and a use method thereof. Background Art

[0002] Diffuse discharge plasma gas flow is a new type of discharge plasma technology that can generate a variety of active substances including reactive oxygen and reactive nitrogen. These active substances have certain biological effects, such as sterilization, promotion of cell growth and regulation of immune response. This technology can treat various soft tissue inflammations (such as tendinitis, bursitis), rheumatoid arthritis, periarthritis of shoulder and soft tissue pain. The generated reactive nitrogen oxides can stimulate cell growth, promote collagen synthesis, and regulate inflammatory responses, thereby producing a series of biological effects on biological tissues. In addition, it can also inhibit the release of inflammatory mediators, reduce tissue damage caused by inflammatory responses, relieve pain by regulating inflammatory responses, and exert anti-inflammatory effects. Reactive nitrogen oxide particles may promote cell repair and regeneration, help improve damaged joint structures, including soft tissues and cartilage, promote the repair and regeneration of joint structures, and reduce inflammation. Reactive nitrogen oxide particles regulate nerve ending activity and reduce pain perception by affecting the release of neurotransmitters and the excitability of neurons.

[0003] Therefore, plasma therapeutic apparatuses have appeared in the prior art, and such therapeutic apparatuses need to use a plasma spray gun.

[0004] For example, a Chinese patent with publication number CN118109778A discloses a high-stability plasma spray gun, including cathode and anode assemblies, and an isolation cascade body for connecting and installing the cathode and anode assemblies. The anode assembly includes an anode ring, a floating electrode ring and an anode nozzle arranged in sequence along the plasma flow direction, and the tip of the cathode extends into the center position of the anode ring.

[0005] For example, a Chinese patent with publication number CN220235040U discloses a novel low-temperature plasma jet rotary spray gun, including a plasma generator, the plasma generator including a gas mixing chamber, a rotating cylinder is arranged at the front end of the gas mixing chamber, a high-voltage line passes through the gas mixing chamber and extends into the rotating cylinder, an inner center electrode is arranged outside the high-voltage line, the inner center electrode is fixed on an insulating sleeve, a through hole for the mixed gas to pass through is arranged on the insulating sleeve, an insulating sleeve is arranged on the outer side of the insulating sleeve through a bearing sleeve, a rotary nozzle is installed at the front end of the rotating cylinder, a turbine is arranged at the end of the rotating cylinder away from the rotary nozzle, a turbine is arranged, a turbine cover is arranged on the turbine cover, a driving air pipe is arranged on the turbine cover, and an air outlet of the driving air pipe faces the blades of the turbine.

[0006] In the prior art, when a plasma arc is generated by high voltage breaking through the air, the plasma spray gun is usually accompanied by a sharp high-decibel discharge sound and high temperature, which causes discomfort to the human hearing. Moreover, the generated plasma arc has a relatively high temperature, which may cause burns to the human body. Summary of the invention

[0007] To solve the above problem, the object of the present invention is to provide a diffuse discharge plasma airflow generating device, a therapeutic apparatus and a method of use.

[0008] The technical solution provided by the present invention is:

[0009] In a first aspect, a diffuse discharge plasma gas flow generating device comprises:

[0010] A tubular shell is provided with an air flow channel in which a rotating air flow is introduced; the pressure distribution between the center and the outside of the rotating flow field presents a significant gradient change characteristic: the flow velocity is slow and the air pressure is slightly higher in the center area, while the flow velocity is fast and the air pressure is slightly lower in the edge area.

[0011] In addition, it also includes a discharge electrode and a guide electrode. The discharge electrode is located in the center of the rotating airflow channel, and its discharge direction is consistent with the flow direction of the rotating airflow; the guide electrode is arranged at the discharge end of the discharge electrode and corresponds to it. When the electrode is energized, under the guidance of the rotating airflow, a plasma is formed between the discharge electrode and the guide electrode. The gas flow rate at the central axis position is small. After discharge, the discharge power density is greater. The gas flow rate deviating from the central axis direction is relatively large, and the discharge is not easy to maintain. This plasma is mainly distributed near the central axis of the rotating airflow. The central gas molecules are rapidly ionized to form a distribution of active particles such as electrons and ions. The discharge boundary particles gradually diffuse with the swirl, and finally form a stable plasma with a diffuse distribution form of silent discharge.

[0012] The present invention utilizes the tubular rotating contraction variable diameter flow field and the pressure gradient change characteristics - the center is a relatively high pressure area, and the edge pressure is relatively low, which makes it easier for the central area to automatically diffuse to the outer contour after discharge. In addition, the discharge temperature near the central area of ​​plasma discharge is higher than that near the tube wall, which makes the gas density in the central area lower than that at the tube wall. Under the combined action of these two effects, a stable diffuse discharge plasma gas flow is formed. The present invention makes full use of the temperature effect of the rotating flow field and the discharge to produce a stable and soft diffuse discharge plasma gas flow. At the same time, the guiding electrode promotes the axial concentration of the discharge, avoids the generation of rotating sliding arcs, and greatly reduces the noise of conventional rotating sliding arc discharges. The rotating airflow can effectively reduce the temperature of the diffuse particle airflow, so that the airflow temperature of the plasma is greatly reduced to close to room temperature. The pressure in the discharge center area is slightly higher than the pressure around the tube wall, which stabilizes the diffuse distribution channel of the plasma active particles.

[0013] As an optional technical solution of the first aspect, an insulating seat body is installed in the tubular shell, and a plurality of oblique air inlet holes are evenly distributed along a ring on the insulating seat body;

[0014] The angle between the air inlet direction and the vertical line of the electrode axis is 15° to 60°;

[0015] When gas is introduced into one end of the plurality of oblique air inlet holes, the rotating airflow is formed at the other end of the plurality of oblique air inlet holes;

[0016] The discharge electrode is installed on the insulating base body and is located in the middle of the oblique air inlet hole arranged in a ring shape.

[0017] Optionally, the insulating seat body is provided with a central hole, and the central hole is located at the center of the beveled air inlet holes arranged in a ring shape;

[0018] A conductive connector is installed in the central hole, and the conductive connector is used to connect the discharge electrode and the wire.

[0019] As an optional technical solution of the first aspect, the discharge electrode is a column, the diameter of which gradually decreases along the discharge direction, and the end of the discharge electrode close to the guide electrode is a hemispherical surface.

[0020] Furthermore, the end of the guide electrode close to the discharge electrode is a hemispherical surface, wherein the curvature radius of the end of the guide electrode close to the discharge electrode is 2 to 5 times the curvature radius of the end of the discharge electrode close to the guide electrode.

[0021] As an optional technical solution of the first aspect, the airflow channel includes a first channel, a second channel, and an outlet that are sequentially connected along the airflow direction;

[0022] The first channel and the second channel are connected through a truncated cone transition section; the diameter of the first channel is R1, the diameter of the second channel is R2, R1>R2, and the ratio of R1 to R2 is 1.5-3.

[0023] Along the direction of airflow rotation, the inner diameter of the cavity first increases and then decreases. The airflow entering the capillary area gradually accelerates, forming a slightly low-pressure area in the direction of airflow in the capillary area. The pressure from the high-pressure electrode to the low-pressure electrode is relatively low compared to the atmospheric pressure.

[0024] Optionally, the discharge electrode is located in the first channel; and the guide electrode is located outside the airflow channel;

[0025] The discharge electrode, the first channel, the second channel, the outlet and the guide electrode are coaxially arranged.

[0026] Optionally, the distance between the outlet and the guide electrode is L, and the value range of L is 1 to 30 mm.

[0027] Optionally, the tubular shell is provided with an outlet and one end thereof is provided with a fixing frame, and the guide electrode is connected to the fixing frame.

[0028] Optionally, the insulating seat is connected to an air pipe through an air pipe fixing terminal, and the air pipe is connected to a silent fan, and the silent fan provides an air intake flow rate of 10 to 75 m 3 / h.

[0029] In a second aspect, a diffuse discharge plasma airflow therapeutic apparatus and a method of use thereof include a host and a diffuse discharge plasma airflow generating device as in the first aspect or any one of the technical solutions of the first aspect;

[0030] The host is provided with a diffuse discharge plasma power supply and a silent fan, wherein the diffuse discharge plasma power supply is used to supply power to the electrode, and the silent fan is used to provide airflow;

[0031] The diffuse discharge plasma power supply frequency is 10-40kHz, and its average power is 100-1000W.

[0032] As an optional technical solution of the second aspect, the diffuse discharge plasma airflow therapy device is used for sterilization, promoting cell growth, regulating immune response, and also for treating diseases including soft tissue inflammation, rheumatoid arthritis, periarthritis of the shoulder, and soft tissue pain.

[0033] In a third aspect, a method for using a diffuse discharge plasma airflow therapeutic device comprises the following steps: turning on a power supply and a silent fan; setting the power supply power, power supply frequency, silent fan air volume and diffuse discharge plasma airflow working time;

[0034] The position to be treated is placed within a range of 5 to 15 cm vertically and 4 to 10 cm horizontally from an outlet of a diffuse discharge plasma airflow generating device, so that the diffuse discharge plasma jet is blown toward the position to be treated.

[0035] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0036] The discharge direction of the discharge electrode of the diffuse discharge plasma airflow generating device of the present invention is the same as the airflow direction. By making the electrode discharge direction consistent with the airflow direction, the noise generated by the irregular movement and discharge of the diffuse discharge plasma caused by the airflow can be effectively avoided. The airflow can also avoid the plasma rotating to generate a sliding arc and frequent starting and stopping, thereby reducing the discharge noise.

[0037] In addition, the design of the rotating flow field can reduce the noise caused by the airflow. On the other hand, the rotating flow field also helps to consume sound energy, thereby achieving a silent effect. Moreover, the airflow swirls along its axial direction outside the high-voltage discharge electrode, and the external gas flow rate is higher than the central gas flow rate, making the central gas pressure slightly higher than the peripheral gas pressure. Under the action of the cold plasma arc expansion and the central micro-positive pressure, the axial plasma arc is promoted to expand radially to form a diffuse discharge, increase the discharge space volume of the plasma, and increase the yield of active particles.

[0038] In addition, the guiding electrode of the present application can generate a stable channel for plasma diffuse discharge, realize stable output of plasma diffuse discharge, make the discharge process more sustainable, reduce the fluctuation and instability of plasma diffuse discharge, and thus reduce the noise generated by the jump of plasma diffuse discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of a diffuse discharge plasma gas flow generating device in one embodiment of the present application;

[0040] Figure 2 This is a cross-sectional view of a diffuse discharge plasma gas flow generating device in one embodiment of the present application;

[0041] Figure 3 This is a schematic diagram of a discharge electrode installed on an insulating base in one embodiment of the present application;

[0042] Figure 4 This is a cross-sectional view of a discharge electrode and an insulating seat in one embodiment of the present application;

[0043] Figure 5 This is a schematic diagram of the oblique air inlet structure in one embodiment of the present application;

[0044] Figure 6 This is a schematic diagram of a therapeutic device in one embodiment of the present application;

[0045] Figure 7 This is a pressure cloud diagram of a diffuse discharge plasma gas flow generating device in one embodiment of the present application;

[0046] Figure 8 This is a streamline diagram of the inlet of a diffuse discharge plasma airflow generating device in one embodiment of the present application;

[0047] Fig. 9 This is an overall airflow streamline diagram of a diffuse discharge plasma airflow generating device in one embodiment of the present application;

[0048] Fig.10 This is a schematic diagram of the position of a diffuse discharge plasma airflow generating device in use in one embodiment of the present application.

[0049] Explanation of the symbols in the schematic diagram:

[0050] Tubular housing 101, air pipe 102, fixing frame 103, air pipe fixing terminal 104, outlet 105;

[0051] A first channel 201, a guide electrode 202, a discharge electrode 203, a second channel 204, a beveled air inlet hole 205, a conductive connector 206, a wire 207, an insulating seat 208, and a screw 209;

[0052] Host 301 , power switch 302 , start / stop button 303 , display screen 304 , and protective cover 305 . DETAILED DESCRIPTION

[0053] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0054] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0055] Arthritis is a disease with a high incidence rate, affecting many groups of people, including the elderly, obese people, people living in humid environments for a long time, people who have suffered trauma, high-intensity athletes and manual laborers. There are many types of arthritis, and their causes and mechanisms vary. Most of them have unknown causes and may be related to genetic, infection, environment, immunity, strain and other factors.

[0056] At present, the methods for treating inflammation mainly include drug therapy, physical therapy, injection therapy, surgical intervention and improvement of lifestyle. Drug therapy and injection therapy are common methods used to relieve pain, but they cannot cure it and are highly targeted at specific types of inflammation. However, these treatment methods have some problems, such as complex medication types, high professionalism, and possible drug dependence or inflammatory resistance. Surgical intervention is usually aimed at severe inflammation or damage, but the postoperative recovery time is long, which is harmful to the human body and may cause sequelae. Traditional physical therapy has a slow effect and a long process. It mainly uses training to enhance physical fitness, promote blood circulation and relieve pain. Plasma disease treatment is a new treatment method. Plasma is an ionized gas composed of ions and free electrons, in which there are a large number of active particles of various types. Relevant medical research has shown that the active nitrogen oxide particles produced therein, including superoxide free radicals, oxygen atoms, nitric oxide and other active nitrogen oxide particles, can be used to relieve and treat arthritis pain. The active nitrogen oxides produced will stimulate cell growth, promote collagen synthesis, and regulate inflammatory responses, etc., and produce a series of biological effects on biological tissues. It can also inhibit the release of inflammatory mediators, reduce tissue damage caused by inflammatory reactions, and relieve pain by regulating inflammatory reactions, thus playing an anti-inflammatory role. Reactive nitrogen oxide particles may promote cell repair and regeneration, help improve damaged joint structures, including soft tissue and cartilage, promote joint structure repair and regeneration, and reduce inflammation. Reactive nitrogen oxide particles can regulate the activity of nerve endings and reduce pain perception by affecting the release of neurotransmitters and the excitability of neurons.

[0057] In this treatment, the joint pain treatment device will create a special environment, which will stimulate the body to produce endogenous nitric oxide and take effect. The process of electrical energy forming active nitrogen oxides usually refers to the discharge sealed inside the device. These processes can cause nitrogen and oxygen in the air to react to generate active nitrogen oxides, such as active NO. Nitric oxide (NO) is an important signal molecule in the human body. It has a variety of physiological functions, including regulating vascular tension, immune response, nerve conduction, etc. In joint treatment, the role of nitric oxide can help promote blood circulation, reduce inflammatory response, promote tissue repair, etc. Vasodilator effect: Nitric oxide can promote blood vessel dilation and increase blood flow, thereby improving blood circulation in the skin. This helps to provide sufficient nutrients and oxygen to skin cells, promote cell metabolism and repair. Anti-inflammatory effect: Nitric oxide can inhibit inflammatory response in the skin, reduce redness, swelling and pain, and help treat inflammatory skin diseases.

[0058] Nitric oxide can also penetrate the skin by gas phase diffusion: nitric oxide molecules can diffuse through tiny pores on the skin surface in a gaseous state. Although the skin is a relatively airtight barrier, it is not completely impermeable, and tiny gas molecules can pass through tiny pores on the skin surface.

[0059] Nitric oxide-mediated relaxation is a complex process that involves the activation of endothelial cell membrane receptors and the opening of ion channels. Joint pain treatment devices usually stimulate nitric oxide in the body in the following ways: ① Stimulate cells to produce nitric oxide: Joint pain treatment device treatment may promote the production of nitric oxide by stimulating nitric oxide synthase in cells. This stimulation is achieved through electromagnetic fields or other means. ② Improve blood circulation: Joint pain treatment devices can improve local blood circulation, thereby increasing the transmission and utilization of nitric oxide in the affected area. ③ Promote inflammation regulation: Nitric oxide plays an important role in the inflammatory process. Joint pain treatment device treatment may promote the production and utilization of nitric oxide by regulating the inflammatory response.

[0060] As an important signaling molecule in the body, nitric oxide can participate in regulating various signaling pathways in physiology and plays an important role in the occurrence and development of various diseases, such as sterilization, promoting cell growth, regulating immune response, etc. It can treat various soft tissue inflammations (such as tendinitis, bursitis), rheumatoid arthritis, frozen shoulder and soft tissue pain.

[0061] In one embodiment, if Figure 1 , Figure 2 As shown, the present invention proposes a diffuse discharge plasma airflow generating device, comprising a tubular shell 101, a discharge electrode 203, and a guide electrode 202. An airflow channel is provided in the tubular shell 101, and the discharge electrode 203 is located at the center of the airflow channel, and the guide electrode 202 is located at the discharge end of the discharge electrode 203. The guide electrode 202 corresponds to the discharge electrode 203. When high voltage is applied to the electrodes, diffuse discharge plasma is generated between the discharge electrode 203 and the guide electrode 202. The guide electrode 202 can generate a stable channel for plasma diffuse discharge, and can achieve stable output of plasma diffuse discharge, so that the discharge process is more continuous, and the fluctuation and instability of plasma diffuse discharge are reduced, thereby reducing the noise generated by the jump of plasma diffuse discharge.

[0062] like Figure 7-9As shown, when a rotating airflow is introduced into the airflow channel, the diffuse discharge plasma formed between the discharge electrode 203 and the guide electrode 202 is located near the center of the rotating airflow, and the discharge direction of the discharge electrode 203 is the same as the airflow direction. By making the electrode discharge direction consistent with the airflow direction, the airflow can be prevented from causing the plasma diffuse discharge to slip or frequently start and stop, thereby reducing the discharge noise.

[0063] In addition, the design of the rotating flow field can use centrifugal force to discharge heavier particles and impurities from the mainstream area, which not only helps to keep the plasma clean, but also helps to reduce the noise caused by particle impact. On the one hand, the noise caused by airflow is reduced, and on the other hand, the rotating flow field also helps to consume sound energy, thereby achieving a silent effect.

[0064] In one embodiment, an insulating seat 208 is installed in the tubular housing 101, and a plurality of oblique air inlet holes 205 are evenly distributed along a ring on the insulating seat 208. Figure 3 , 5 The insulating seat 208 is connected to the air pipe 102 through the air pipe fixing terminal 104, and the air pipe 102 is connected to the silent fan. The silent fan with low wind pressure is used to provide the air source, which can reduce the noise generated by the equipment.

[0065] One end of the beveled air inlet 205 is connected to the air flow channel, and the other end is connected to the air source. After the air source enters the beveled air inlet 205, the air flow is guided by the beveled air inlet 205 to move in the air flow channel in a rotating flow field, thereby forming a rotating airflow.

[0066] The included angle between the air inlet direction and the vertical line of the electrode axis is 15° to 60°, for example, 15°, at which point the generated NO concentration, equipment outlet temperature and noise are all relatively ideal.

[0067] The discharge electrode 203 is mounted on the insulating seat 208 and is located in the middle of the circularly arranged oblique air inlet holes 205. Specifically, the insulating seat 208 is provided with a central hole, and the central hole is located in the central part of the circularly arranged oblique air inlet holes 205. A conductive connector 206 is installed in the central hole, and the conductive connector 206 is used to connect the discharge electrode 203 and the wire 207. The wire 207 is placed in the air pipe 102.

[0068] The discharge electrode 203 is located in the middle of the annularly arranged oblique air inlet holes 205, so that after the plasma diffuse discharge is excited, the plasma diffuse discharge is located in the middle of the rotating flow field, which can avoid the impact of the airflow on the plasma diffuse discharge.

[0069] The obliquely cut air inlet 205 can reduce the impact and eddy current when the airflow enters, thereby helping to reduce noise. At the same time, the rotating flow field generated by it can use centrifugal force to discharge heavier particles and impurities from the mainstream area, which not only helps to keep the plasma clean, but also helps to reduce the noise caused by particle impact. Thus, on the one hand, the noise caused by the airflow is reduced, and on the other hand, the rotating flow field also helps to consume sound energy, thereby achieving a silent effect.

[0070] like Figure 4 As shown, the discharge electrode 203 can be connected to the conductive connector 206 by means of a screw 209. The conductive connector 206 is made of a conductive metal or alloy, which is relatively mature in the prior art and will not be described in detail here.

[0071] The airflow channel provided in the tubular housing 101 includes a first channel 201, a second channel 204, and an outlet 105 which are sequentially connected along the airflow direction. The discharge electrode 203, the first channel 201, the second channel 204, the outlet 105, and the guide electrode 202 are coaxially arranged. The discharge electrode 203 is located in the first channel 201, and the guide electrode 202 is located outside the airflow channel. The open outlet 105 can eliminate the obstruction to the airflow, thereby reducing noise.

[0072] Regarding the installation method of the guide electrode 103, in one embodiment, Figure 1 , Figure 2 As shown, the tubular housing 101 is provided with an outlet 105 and a fixing frame 103 is installed at one end. For example, the fixing frame 103 can be connected to the tubular housing 101 by screws, or other installation methods in the prior art can be used. The guide electrode 202 is connected to the fixing frame 103 .

[0073] In one embodiment, the guide electrode 202 may be made of high temperature resistant stainless steel.

[0074] The discharge electrode 203 is a cylinder, and its diameter gradually decreases along the discharge direction to form a smooth surface. The end of the discharge electrode 203 close to the guide electrode 202 is a hemispherical surface, and the end of the guide electrode 202 close to the discharge electrode 203 is a hemispherical surface. The guide electrode 202 can also play a role in diverting and scattering the passing airflow, thereby reducing wind noise. The front end of the guide electrode 202 is hemispherical, which can evenly guide the airflow, stabilize the airflow passing through the guide electrode 202, and play a role in diverting and scattering the passing airflow, reduce the wind speed of the airflow, and offset the wind force of the airflow, thereby playing a role in reducing wind noise.

[0075] The length of the discharge electrode 203 is 3.8 to 5.2 times that of the guide electrode 202. For example, the length of the discharge electrode 203 can be 46 mm, and the length of the guide electrode 202 can be 12 mm. The radius of curvature of the end of the guide electrode 202 close to the discharge electrode 203 is 2 to 5 times the radius of curvature of the end of the discharge electrode 203 close to the guide electrode 202. For example, the radius of the hemispherical surface of the end of the guide electrode 202 close to the discharge electrode 203 is 16 mm, and the radius of the hemispherical surface of the end of the discharge electrode 203 close to the guide electrode 202 can be 8 mm. At this time, the plasma diffuse discharge is concentrated in the middle of the guide electrode 202. If the guide electrode 202 is larger, the plasma diffuse discharge will not be concentrated in the middle of the guide electrode 202, but will be dispersed. If the guide electrode 202 is smaller, the plasma diffuse discharge will cover the entire guide electrode 202, and long-term operation will cause the guide electrode 202 to be damaged due to excessive temperature.

[0076] The guide electrode 202 can provide a stable channel for the plasma diffuse discharge, reduce the fluctuation and instability of the plasma diffuse discharge, and thus reduce the noise generated by the jump of the plasma diffuse discharge. Through the guide electrode 202, energy can be more effectively transferred to the diffuse discharge plasma, reducing energy loss and thermal shock of the plasma diffuse discharge, and further reducing noise. Due to the presence of the guide electrode 202, the sudden extinction of the plasma diffuse discharge can be avoided to a certain extent, and the continuity of the discharge can be maintained, so that there will be no obvious arc breaking noise.

[0077] The discharge electrode 203 is a high-voltage electrode, and the tail of the high-voltage electrode gradually converges, so that the electric field at the axial tail of the high-voltage electrode is locally enhanced, and the radial electric field of the high-voltage electrode, especially the radial electric field near one end of the fixing frame 103, is weakened.

[0078] Moreover, the rotating flow field can limit the radial free electron density around the discharge electrode 203 and improve the breakdown voltage. The guide electrode 202 with a hemispherical surface is arranged relative to the discharge electrode 203, which can increase the output while ensuring that there is no sliding high-noise discharge. At the same time, it can also be used to limit the discharge electrode 203 from violent spark discharge and ablation of materials to form noise, and can also promote the axial main plasma diffuse discharge fluctuation stability at the tail of the discharge electrode 203, and the overall power stability.

[0079] like Figure 2 As shown, the distance between the outlet 105 and the guide electrode 202 is L, and the value range of L is 1 to 30 mm, for example, it can be 8 mm, or 8.2 mm, or 9.3 mm, or 10 mm, etc.

[0080] The diameter of the first channel 201 is R1, the diameter of the second channel 204 is R2, R1>R2, and the ratio of R1 to R2 is 1.5 to 3. In other words, it presents a "thick front and thin back" shape, so that the thick front channel has a slow flow rate and high pressure, and the thin back channel has a fast flow rate and low pressure, which can guide the discharge toward the outlet, thereby achieving the purpose of reducing noise and stabilizing diffuse discharge.

[0081] In order to allow the airflow to smoothly enter the second channel 204 from the first channel 201, the first channel 201 is connected to the second channel 204 through a truncated cone-shaped transition section. The structure of large front and small back makes the airflow form a Gaussian velocity distribution at the outlet 105, which helps to improve the stability of the airflow and reduce the vibration and noise caused by the airflow.

[0082] In one embodiment, the present invention further proposes a diffuse discharge plasma airflow therapeutic device, comprising a main unit 301 and the diffuse discharge plasma airflow generating device described above. A diffuse discharge plasma power supply and a silent fan are provided in the main unit 301, wherein the diffuse discharge plasma power supply is used to power the electrode, and the silent fan is used to provide airflow. The air intake flow rate provided by the silent fan is 10 to 75 m / s. 3 / h, for example, 30m 3 / h. If the air intake flow is too low, the NO concentration will be high, the noise will be low, and the equipment outlet temperature will be high. If the air intake flow is too high, the NO concentration will be low, the equipment outlet temperature will be low, and the noise will be high. For example, when the air intake flow is 30m 3 / h, the NO concentration, equipment outlet temperature and noise are all appropriate.

[0083] The frequency of the diffuse discharge plasma power supply is 10 to 40 kHz, for example, 10 kHz, 15 kHz, or 25 kHz, etc. Avoiding the use of a power supply with too low a frequency can reduce the noise generated by interruption and restart.

[0084] The power of the diffuse discharge plasma power supply is 100-1000W, for example, 500W, so that the discharge stability is better, the NO concentration generated is more ideal, and the noise is lower.

[0085] A power distribution board may be provided in the host 301, a PLC controller may be installed on the power distribution board, a display screen 304 may be installed on the host 301, and the display screen 304 may be electrically connected to the PLC controller. A protective shell may be added to the display screen 304, and the working time of the diffuse discharge plasma gas flow may be set on the display screen 304. A power switch 302 and a start / stop button 303 may also be installed on the host 301. This is relatively mature in the prior art and will not be described in detail here.

[0086] In one embodiment, a decibel meter may also be provided to monitor noise to ensure that the overall equipment noise is below 60 decibels to achieve a silent effect.

[0087] The plasma diffuse discharge in the air is a high-voltage discharge process. In order to prevent the risk of high-voltage electric shock and electromagnetic radiation, as well as possible burns, a cylindrical protective cover 305 can be added along the airflow axis to protect the diffuse discharge plasma airflow generating device as a whole. A particle sensor is set on the side of the protective cover 305 to monitor the particle concentration. A cyclone blade is installed at the outlet of the protective cover 305 to reduce the airflow resistance while also rotating the airflow to promote the mixing of particles. A temperature sensor can also be set on the cyclone blade to detect the airflow temperature.

[0088] The types of diseases that can be treated by the above diffuse discharge plasma airflow therapeutic device include: sterilization, promotion of cell growth, regulation of immune response, etc. It can treat various soft tissue inflammations (such as tendinitis, bursitis), rheumatoid arthritis, periarthritis of the shoulder and soft tissue pain.

[0089] When the air intake flow rate is controlled at 30m 3 / h, the angle between the air inlet direction and the vertical line of the electrode axis is 15 degrees, the power supply power is controlled to 500W, the power supply frequency is 25kHz, the curvature radius of the discharge electrode is 8mm, the curvature radius of the guide electrode is 15mm, the detection position is 10cm from the equipment outlet, the initial environment temperature is 26.1℃, the initial NO concentration is 0ppm, and the initial environment noise at 1m away from the equipment is 43.7dBA. Changing the spacing L, the data in the following table are obtained:

[0090]

[0091]

[0092] It can be seen that when the distance L is 8-10mm, the airflow temperature is the highest, the concentration is also high, and the noise is not large, which can meet the requirements and is relatively ideal. When the distance is too close, the discharge volume is small, the temperature rise is low, and the plasma diffuse discharge is stable. Although it is relatively quiet, the concentration and output are too low. When the distance is too far, the discharge stability becomes worse, the concentration decreases significantly, and the noise becomes louder and louder.

[0093] The electrode spacing is set to 10mm, the angle between the air intake direction and the vertical line of the electrode axis is 15 degrees, the power supply power is 500W, the power supply frequency is 25kHz, the curvature radius of the discharge electrode close to the guide electrode is 8mm, the curvature radius of the guide electrode close to the discharge electrode is 15mm, the detection position is 10cm from the equipment outlet, the initial environment temperature is 24.6℃, the initial NO concentration is 0ppm, and the initial environment noise at 1m from the equipment is 39.4dBA. Changing the air intake flow rate, the data in the following table are obtained:

[0094] <![CDATA[Intake air flow rate (m 3 / h)]]> Equipment outlet temperature (℃) NO concentration (ppm) Noise level at 1m from the device (dBA) 5 57.4 399 50.7 10 54.3 333 54.5 20 50.1 242 57.3 30 40.0 221 58.9 40 33.7 107 62.7 50 30.1 70 64.8 75 28.2 23 65.1

[0095] It can be seen that when the intake air flow is too low, the NO concentration is high, the noise is low, and the equipment outlet temperature is high. When the intake air flow is too high, the NO concentration is low, the equipment outlet temperature is low, and the noise is high. 3 / h, the NO concentration, equipment outlet temperature and noise are all appropriate.

[0096] Set the electrode spacing to 10 mm and the air flow rate to 30 m 3 / h, the angle between the air inlet direction and the vertical line of the electrode axis is 15 degrees, the power supply power is 500W, the power supply frequency is 25kHz, the curvature radius of the guide electrode close to the discharge electrode is 15mm, the detection position is 10cm from the equipment outlet, the initial environment temperature is 25.5℃, the initial NO concentration is 0ppm, and the initial environment noise at 1m from the equipment is 41.2dBA. Changing the curvature radius of the discharge electrode close to the guide electrode, the data in the following table are obtained:

[0097]

[0098]

[0099] It can be seen that the optimal curvature radius of the discharge electrode near the guide electrode is in the range of 5 to 8 mm. When the discharge electrode is thinner near the guide electrode, it is easy to be damaged by ablation, resulting in a sudden change in the discharge state, a small discharge area, and a low NO concentration. When the discharge electrode is thicker near the guide electrode, the plasma diffuse discharge is prone to noise increase due to sliding, the diffuse discharge is unstable, and the active NO concentration is also poor.

[0100] Set the electrode spacing to 10 mm and the air flow rate to 30 m 3 / h, the angle between the air inlet direction and the vertical line of the electrode axis is 15 degrees, the power supply is 500W, the power supply frequency is 25kHz, the curvature radius of the discharge electrode close to the guide electrode is 8mm, the detection position is 10cm from the equipment outlet, the initial environment temperature is 26.4℃, the initial NO concentration is 0ppm, and the initial environment noise at 1m from the equipment is 40.7dBA. Changing the curvature radius of the guide electrode close to the discharge electrode, the data in the following table are obtained:

[0101] Curvature radius of guide electrode (mm) Equipment outlet temperature (℃) NO concentration (ppm) Noise level at 1m from the device (dBA) 5 32.6 100 45 8 36.7 140 50 12 38.4 180 53 15 39.8 243 59.9 20 36.6 201 67.7

[0102] It can be seen that when the curvature radius of the discharge electrode close to the guide electrode is 8mm, the optimal curvature radius of the guide electrode close to the discharge electrode is about 15mm. At this time, the temperature and noise are not too high, and the concentration is sufficient to meet the requirements. If the guide electrode is smaller (smaller curvature radius) close to the discharge electrode, the guide electrode will be ablated to a certain extent. Due to the insufficient discharge volume, the plasma diffuse discharge is relatively stable and the noise is small, but the concentration is also relatively small. When the curvature of the guide electrode close to the discharge electrode is large, under limited power conditions, the temperature and concentration have a certain decrease, which is relatively ideal, but the diffuse discharge slides seriously and the noise is too large.

[0103] Set the electrode spacing to 10 mm and the air flow rate to 30 m 3 / h, the angle between the air inlet direction and the vertical line of the electrode axis is 15 degrees, the power frequency is 25kHz, the curvature radius of the discharge electrode close to the guide electrode is 8mm, the curvature radius of the guide electrode close to the discharge electrode is 15mm, the detection position is 10cm from the equipment outlet, the initial environment temperature is 24.9℃, the initial NO concentration is 0ppm, and the initial environment noise at 1m from the equipment is 39.4dBA. By changing the power supply, the data in the following table are obtained:

[0104]

[0105]

[0106] It can be seen that the power supply power is relatively suitable between 400 and 600 W, for example, it can be 500 W. When the power is relatively small, the temperature rise is small, the output is low, the discharge stability is poor, and the discharge interruption is easy to occur, and the sudden ignition causes a sudden increase in noise. When the power is too large, the electrode is easy to be ablated.

[0107] Set the electrode spacing to 10 mm and the air flow rate to 30 m 3 / h, the angle between the air inlet direction and the vertical line of the electrode axis is 15 degrees, the power supply is 500W, the curvature radius of the discharge electrode close to the guide electrode is 8mm, the curvature radius of the guide electrode close to the discharge electrode is 15mm, the detection position is 10cm from the equipment outlet, the initial environment temperature is 24.5℃, the initial NO concentration is 0ppm, and the initial environment noise at 1m from the equipment is 40.1dBA. Changing the power supply frequency, the data in the following table are obtained:

[0108] Power frequency (kHz) Equipment outlet temperature (℃) NO concentration (ppm) Noise level at 1m from the device (dBA) 5 36.9 199 68.4 10 39.7 201 60.9 15 38.1 235 59.7 25 38.8 223 59.3 50 38.6 283 59.4 75 37.2 355 57.8

[0109] The power supply frequency has little effect on various parameters and has a wide range of options. It should be noted that the power supply frequency should not be too low to prevent noise from being generated when the plasma diffuse discharge is interrupted and restarted. The optional power supply frequency should not be lower than 10kHz.

[0110] Set the electrode spacing to 10 mm and the air flow rate to 30 m 3 / h, the power supply is 500W, the power supply frequency is 25kHz, the curvature radius of the discharge electrode close to the guide electrode is 8mm, the curvature radius of the guide electrode close to the discharge electrode is 15mm, the detection position is 10cm from the equipment outlet, the initial environment temperature is 25.2℃, the initial NO concentration is 0ppm, and the initial environment noise at 1m from the equipment is 39.4dBA. By changing the angle between the air intake direction and the vertical line of the electrode axis, the data in the following table are obtained:

[0111] Angle (degrees) Equipment outlet temperature (℃) NO concentration (ppm) Noise level at 1m from the device (dBA) 0 42.9 269 52.9 15 39.7 237 55.8 30 37.1 222 57.3 45 35.7 223 58.1 60 33.9 213 52.7 75 33.3 198 51.2

[0112] It can be seen that when the vertical angle between the air inlet direction and the electrode axis is 15° to 60°, the NO concentration and the equipment outlet temperature meet the requirements. Among them, when the vertical angle between the air inlet direction and the electrode axis is 15°, the NO concentration and the equipment outlet temperature are relatively high, and the comprehensive effect is relatively the best. When the vertical angle between the air inlet direction and the electrode axis is too large, the NO concentration will be significantly reduced.

[0113] In one embodiment, the present invention also proposes a method for using a diffuse discharge plasma airflow therapy device, comprising the following steps: turning on the power supply and the silent fan; setting the power supply power, power supply frequency, silent fan air volume and diffuse discharge plasma airflow working time; making the position to be treated within a range of 5 to 15 cm vertically and 4 to 10 cm horizontally from the outlet, for example, the vertical distance can be 10 cm and the horizontal distance can be 5 cm, so that the diffuse discharge plasma jet blows toward the position to be treated.

[0114] like Fig.10 As shown in the figure, the vertical and horizontal distances between the diffuse discharge plasma airflow generating device and the treatment position are verified by experiments. The electrode spacing is set to 10mm and the air flow rate is 30m 3 / h, power supply power is 500W, power supply frequency is 25kHz, the curvature radius of the discharge electrode close to the guide electrode is 8mm, the angle between the air inlet direction and the vertical line of the electrode axis is 15°, the curvature radius of the guide electrode close to the discharge electrode is 15mm, the detection position is 10cm from the equipment outlet, the initial environment temperature is 24.4℃, the initial NO concentration is 0ppm, and the initial environment noise at 1m from the equipment is 40.2dBA. Changing the vertical distance and horizontal distance, the data in the following two tables are obtained:

[0115] Vertical distance (cm) Temperature(℃) NO(ppm) 0 66 557 5 53 317 10 40.2 240 20 35.5 67 30 32.3 5 40 30.2 0 50 30.0 0

[0116] Horizontal distance (cm) Temperature(℃) NO(ppm) 0 10.4 208 5 40.2 233 10 30.6 109 15 0 30

[0117] It can be seen that when the treatment position is about 10 cm vertically away from the outlet of the diffuse discharge plasma airflow generating device and about 5 cm horizontally away from the outlet of the diffuse discharge plasma airflow generating device, the outlet temperature and NO concentration are more appropriate.

[0118] The electrode spacing is 10mm and the air flow rate is controlled at 30m 3 / h, the angle between the air inlet direction and the perpendicular to the electrode axis is 15°, the power is 504.1W, the power frequency is 25kHz, the curvature radius of the discharge electrode close to the guide electrode is 8mm, the curvature radius of the guide electrode close to the discharge electrode is 15mm, the detection position is 10cm from the equipment outlet, the initial environmental temperature is 24.6℃, the ambient humidity is 56.88%RH, the initial NO concentration is 0ppm, and the ambient noise at 1m from the equipment is 39.8dBA.

[0119] Run time(s) Equipment outlet temperature (℃) NO concentration (ppm) Noise level at 1m from the device (dBA) 5 26.1 86 59.5 10 29.9 101 57.4 20 30.8 123 59.6 30 31.5 154 58.5 60 32.1 181 59.1 120 33.8 201 57.9 180 35.7 216 58.4 240 37.9 219 58.1 300 38.2 215 58.9 600 37.5 219 57.9 1200 38.3 221 57.6 1800 38.0 220 57.2 2100 37.8 272 57.8

[0120] After 2 minutes of operation, the concentration gradually reaches the required value (≥200ppm); after 6 minutes, the temperature basically reaches thermal equilibrium and will not cause skin ablation; after 10 minutes, the concentration parameter stabilizes at around 215ppm. Therefore, the single continuous treatment time can be controlled within 2 to 10 minutes.

[0121] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A diffuse discharge plasma airflow generating device, characterized in that: include: A tubular housing (101), wherein the tubular housing (101) is provided with an air flow channel, and a rotating air flow is introduced into the air flow channel; A discharge electrode (203), the discharge electrode (203) is located at the center of the airflow channel, and its discharge direction is the same as the airflow direction; A guide electrode (202), the guide electrode (202) being located at a discharge end of the discharge electrode (203) and being arranged corresponding to the discharge electrode (203); When the electrodes are powered on, diffuse discharge plasma is formed between the discharge electrode (203) and the guide electrode (202), and the plasma is located near the center of the rotating airflow.

2. The diffuse discharge plasma gas flow generating device according to claim 1, characterized in that: An insulating seat (208) is installed in the tubular shell (101), and a plurality of oblique air inlet holes (205) are evenly distributed along a ring shape on the insulating seat (208); The angle between the air inlet direction and the vertical line of the electrode axis is 15° to 60°; When gas is introduced into one end of the plurality of oblique air inlet holes (205), the rotating airflow is formed at the other end of the plurality of oblique air inlet holes (205); The discharge electrode (203) is mounted on an insulating base (208) and is located in the middle of the obliquely cut air inlet holes (205) arranged in a ring shape.

3. The diffuse discharge plasma gas flow generating device according to claim 2, characterized in that: The insulating seat body (208) is provided with a central hole, and the central hole is located at the center of the beveled air inlet holes (205) arranged in a ring shape; A conductive connecting piece (206) is installed in the central hole, and the conductive connecting piece (206) is used to connect the discharge electrode (203) and the wire (207).

4. The diffuse discharge plasma gas flow generating device according to any one of claims 1 to 3, characterized in that: The discharge electrode (203) is a column, the diameter of which gradually decreases along the discharge direction.

5. The diffuse discharge plasma gas flow generating device according to claim 4, characterized in that: The end of the discharge electrode (203) close to the guide electrode (202) is in the shape of a hemispherical curved surface; The end of the guide electrode (202) close to the discharge electrode (203) is in the shape of a hemispherical curved surface; The curvature radius of one end of the guide electrode (202) close to the discharge electrode (203) is 2 to 5 times the curvature radius of one end of the discharge electrode (203) close to the guide electrode (202).

6. The diffuse discharge plasma gas flow generating device according to claim 1, characterized in that: The airflow channel comprises a first channel (201), a second channel (204), and an outlet (105) which are sequentially connected along the airflow direction; Wherein, the first channel (201) and the second channel (204) are connected through a truncated cone-shaped transition section; The diameter of the first channel (201) is R1, the diameter of the second channel (204) is R2, R1>R2, and the ratio of R1 to R2 is 1.5-3.

7. The diffuse discharge plasma gas flow generating device according to claim 6, characterized in that: The distance between the outlet (105) and the guide electrode (202) is L, and the value range of L is 1 to 30 mm.

8. The diffuse discharge plasma gas flow generating device according to claim 6, characterized in that: The discharge electrode (203) is located in the first channel (201); and the guide electrode (202) is located outside the airflow channel; The discharge electrode (203), the first channel (201), the second channel (204), the outlet (105), and the guide electrode (202) are coaxially arranged.

9. The diffuse discharge plasma gas flow generating device according to claim 8, characterized in that: The tubular housing (101) is provided with an outlet (105) and a fixing frame (103) is installed at one end, and the guide electrode (202) is connected to the fixing frame (103).

10. The diffuse discharge plasma gas flow generating device according to claim 2, characterized in that: The insulating seat body (208) is connected to an air pipe (102) via an air pipe fixing terminal (104), and the air pipe (102) is connected to a silent fan; The air intake flow rate provided by the silent fan is 10~75m 3 / h.

11. A diffuse discharge plasma airflow therapeutic apparatus, characterized in that: It comprises a mainframe (301) and a diffuse discharge plasma airflow generating device as claimed in any one of claims 1 to 10; The host (301) is provided with a diffuse discharge plasma power supply and a silent fan, wherein the diffuse discharge plasma power supply is used to supply power to the electrode, and the silent fan is used to provide airflow; The diffuse discharge plasma power supply has a frequency of 10 to 40 kHz and an average power of 100 to 1000W.

12. The diffuse discharge plasma airflow therapeutic apparatus according to claim 11, characterized in that: The diffuse discharge plasma airflow therapy device is used to kill bacteria, promote cell growth, regulate immune response, and treat diseases including soft tissue inflammation, rheumatoid arthritis, periarthritis of the shoulder, and soft tissue pain.

13. A method for using the diffuse discharge plasma airflow therapeutic apparatus as claimed in claim 11, characterized in that: The following steps are involved: Turn on the power supply and silent fan; set the power supply power, power supply discharge cycle, discharge duty cycle, silent fan air volume and diffuse discharge plasma airflow treatment time; The position to be treated is placed within a range of 5 to 15 cm vertically and 4 to 10 cm horizontally from an outlet of a diffuse discharge plasma airflow generating device, so that the diffuse discharge plasma airflow is blown toward the position to be treated.

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