阅读说明：本技术 便携式大气压冷等离子体射流装置 (Portable atmospheric pressure cold plasma jet device ) 是由 许德晖 章金 张新颖 彭三三 张怀延 刘志杰 刘定新 于 2021-07-13 设计创作，主要内容包括：本发明公开了一种便携式大气压冷等离子体射流装置,便携式大气压冷等离子体射流装置中,空心通道连接用于导入气体的进气口,进气口位于空心阳极射流装置的第一端,高压电极设于空心通道,高压电极连接设在第一端的第一接线,地电极设于空心通道且相对于高压电极布置,地电极连接设在第一端的第二接线；电压控制继电器连接气体流量传感器以接收电压信号,当电压信号低于下限,电压控制继电器被触发以中断射流,当电压信号低于预定值,电压控制继电器被触发以中断射流,当电压信号达到预定值,电压控制继电器延时以开始射流。(The invention discloses a portable atmospheric pressure cold plasma jet device, wherein a hollow channel is connected with a gas inlet for introducing gas, the gas inlet is positioned at the first end of the hollow anode jet device, a high-voltage electrode is arranged in the hollow channel, the high-voltage electrode is connected with a first wiring arranged at the first end, a ground electrode is arranged in the hollow channel and is arranged opposite to the high-voltage electrode, and the ground electrode is connected with a second wiring arranged at the first end; the voltage control relay is connected with the gas flow sensor to receive the voltage signal, and when the voltage signal is lower than the lower limit, the voltage control relay is triggered to interrupt the jet flow.)

1. A portable atmospheric pressure cold plasma jet device is characterized in that the device comprises,

a hollow anode fluidic device comprising, in combination,

a hollow channel connected to a gas inlet for introducing a gas, the gas inlet being located at a first end of the hollow anode fluidic device,

a high voltage electrode arranged in the hollow channel, the high voltage electrode is connected with a first wiring arranged at the first end,

a ground electrode provided in the hollow passage and arranged opposite to the high voltage electrode, the ground electrode being connected to a second wiring provided at a first end;

a direct current storage battery;

the inverter module is connected with the direct-current storage battery;

one end of the high-voltage module is connected with the inversion module, and the other end of the high-voltage module is connected with the first wiring to output high-voltage excitation;

a gas source connected to the gas inlet to deliver the gas,

a control valve provided between the gas source and the gas inlet to control a gas flow rate,

a gas flow sensor disposed between the gas source and the gas inlet to measure gas flow data and to emit a voltage signal,

and the voltage control relay is connected with the gas flow sensor to receive the voltage signal, is triggered to interrupt the jet flow when the voltage signal is lower than a lower limit, is triggered to interrupt the jet flow when the voltage signal is lower than a preset value, and delays to start the jet flow when the voltage signal reaches the preset value.

2. A portable atmospheric pressure cold plasma jet device as claimed in claim 1, wherein the gas source is preferably a gas cylinder.

3. A portable atmospheric pressure cold plasma fluidic device according to claim 2, wherein said gas cylinder is a steel gas cylinder with a height of 250mm and a radius of 40mm and a capacity of 1L.

4. A portable atmospheric pressure cold plasma fluidic device of claim 1, wherein the load terminal of the voltage control relay is connected in the circuit where the high voltage module is located and is in a normally open state.

5. A portable atmospheric pressure cold plasma j et device as claimed in claim 1 wherein the dc storage battery comprises a 12V, 2.6AH capacity lead acid battery.

6. The portable atmospheric pressure cold plasma jet device as claimed in claim 1, wherein the inverter module is a 220V power frequency pure sine output, and can bear a load of 300W at most.

7. A portable atmospheric pressure cold plasma jet device as claimed in claim 6, wherein the inverter module is provided with an AC voltage regulator to regulate the output voltage between 90V and 220V.

8. A portable atmospheric pressure cold plasma fluidic device of claim 1, wherein the hollow anode fluidic device is provided with a temperature probe and a heat dissipation unit that monitor temperature in real time.

9. A portable atmospheric pressure cold plasma jet device as claimed in claim 1, wherein the portable atmospheric pressure cold plasma jet device further comprises a housing.

10. A portable atmospheric pressure cold plasma jet device as claimed in claim 9, wherein the housing is made of teflon and the thickness of the case is 2 mm.

Technical Field

The invention relates to the technical field of plasmas, in particular to a portable atmospheric pressure cold plasma jet device.

Background

The plasma is a fourth state of matter, which is different from solid, gas and liquid substances, and charged or neutral microscopic particles contained in the plasma have higher energy and can generate physical and chemical interaction with external substances under certain conditions. The plasma can be classified into a high temperature plasma and a low temperature plasma according to the difference in gas temperature that the plasma macroscopically exhibits. The cold plasma is low-temperature plasma with the macroscopic temperature close to the room temperature, and the characteristic that the temperature is close to the room temperature enables the cold plasma to become the hotspot direction of the current plasma research and to be widely applied.

The cold plasma may be divided into an atmospheric pressure cold plasma and a low pressure cold plasma according to the generation condition of the cold plasma. Compared with low-pressure cold plasma, the production of atmospheric pressure cold plasma does not need vacuum conditions, greatly reduces the requirements for equipment and the conditions of application, and therefore the atmospheric pressure cold plasma is widely researched. The mode of generating the atmospheric pressure cold plasma mainly comprises dielectric barrier discharge, plasma jet, corona discharge and the like. Compared with a common plasma generation mode, the atmospheric pressure cold plasma jet technology has the advantages of lower cost, wider use scene and the like. And the method has very wide application prospect in daily life aspects such as air purification, sewage treatment and the like, industrial aspects such as material surface treatment, etching and the like, and biomedical aspects such as cell treatment, sterilization, disinfection, tooth cleaning, wound treatment, skin disease treatment and the like.

However, the excitation power supply of the atmospheric pressure cold plasma jet system at home and abroad is large in size, usually needs to be supplied with power by mains supply, and meanwhile, the discharge needs to be supplied with gas continuously by a gas source, so that the whole jet system is large in size, very inconvenient to carry, can be used only in fixed places of hospitals or laboratories, and is greatly limited in use under certain conditions. As plasmas begin to be applied in more and more fields, miniaturization and integration of the whole atmospheric pressure cold plasma jet system are very necessary.

The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.

Disclosure of Invention

The invention aims to provide a portable atmospheric pressure cold plasma jet device, which has less generation limitation of plasma jet and greatly improves the portability, thereby being widely applied.

In order to achieve the above purpose, the invention provides the following technical scheme:

the invention relates to a portable atmospheric pressure cold plasma jet device which comprises,

a hollow channel connected to a gas inlet for introducing a gas, the gas inlet being located at a first end of the hollow anode fluidic device,

a high voltage electrode arranged in the hollow channel, the high voltage electrode is connected with a first wiring arranged at the first end,

a ground electrode provided in the hollow passage and arranged opposite to the high voltage electrode, the ground electrode being connected to a second wiring provided at a first end;

a direct current storage battery;

the inverter module is connected with the direct-current storage battery;

one end of the high-voltage module is connected with the inversion module, and the other end of the high-voltage module is connected with the first wiring to output high-voltage excitation;

a gas source connected to the gas inlet to deliver the gas,

a control valve provided between the gas source and the gas inlet to control a gas flow rate,

a gas flow sensor disposed between the gas source and the gas inlet to measure gas flow data and to emit a voltage signal,

and the voltage control relay is connected with the gas flow sensor to receive the voltage signal, is triggered to interrupt the jet flow when the voltage signal is lower than a lower limit, is triggered to interrupt the jet flow when the voltage signal is lower than a preset value, and delays to start the jet flow when the voltage signal reaches the preset value.

In the portable atmospheric pressure cold plasma jet device, the gas source is a gas cylinder.

In the portable atmospheric pressure cold plasma jet device, the gas cylinder is a steel gas cylinder with the height of 250mm, the radius of 40mm and the capacity of 1L.

In the portable atmospheric pressure cold plasma jet device, the load end of the voltage control relay is connected in a circuit where the high-voltage module is located and is in a normally open state.

In the portable atmospheric pressure cold plasma jet device, the direct current storage battery comprises a lead-acid storage battery with the voltage of 12V and the capacity of 2.6 AH.

In the portable atmospheric pressure cold plasma jet device, the inverter module is 220V power frequency pure sine output and can bear 300W load to the maximum.

In the portable atmospheric pressure cold plasma jet device, the inverter module is provided with an alternating current voltage regulator, so that the output voltage value is regulated between 90V and 220V.

In the portable atmospheric pressure cold plasma jet device, the hollow anode jet device is provided with a temperature probe for monitoring the temperature in real time and a heat dissipation unit.

In the portable atmospheric pressure cold plasma jet device, the portable atmospheric pressure cold plasma jet device further comprises a shell.

In the portable atmospheric pressure cold plasma jet device, the shell is made of polytetrafluoroethylene, and the thickness of the box body is 2 mm.

In the technical scheme, the portable atmospheric pressure cold plasma jet device provided by the invention has the following beneficial effects: the plasma jet system is integrated, can be used without an external power supply, and has wider application occasions. In addition, the invention has the functions of flow velocity detection and temperature detection, thereby improving the use safety of the device; meanwhile, the voltage regulation function can meet the use requirements under different conditions, and the portable atmospheric pressure cold plasma jet device has great application advantages and extremely small application limit.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

Fig. 1 is a schematic structural diagram of a portable atmospheric pressure cold plasma jet device;

fig. 2 is a schematic diagram of the structure of a fluidic device of the portable atmospheric pressure cold plasma fluidic device;

fig. 3 is a schematic structural view of a housing of the portable atmospheric pressure cold plasma jet device;

4(a) to 4(c) are emission spectra of plasma jet of the portable atmospheric pressure cold plasma jet device at 6kV 10.43kHz with different gas ratios; wherein FIG. 4(a) shows emission spectrum characteristics of pure He, and FIG. 4(b) shows He + 3% O₂Emission spectrum characteristics, He + 9% O in FIG. 4(c)₂Emission spectral characteristics.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to fig. 1 to 4(c) of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.

In one embodiment, as shown in fig. 1-3, a portable atmospheric pressure cold plasma jet device includes,

a hollow anode fluidic device comprising, in combination,

a hollow channel connected to a gas inlet for introducing a gas, the gas inlet being located at a first end of the hollow anode fluidic device,

a high voltage electrode arranged in the hollow channel, the high voltage electrode is connected with a first wiring arranged at the first end,

a ground electrode provided in the hollow passage and arranged opposite to the high voltage electrode, the ground electrode being connected to a second wiring provided at a first end;

a direct current storage battery;

the inverter module is connected with the direct-current storage battery;

one end of the high-voltage module is connected with the inversion module, and the other end of the high-voltage module is connected with the first wiring to output high-voltage excitation;

a gas source connected to the gas inlet to deliver the gas,

a control valve provided between the gas source and the gas inlet to control a gas flow rate,

a gas flow sensor disposed between the gas source and the gas inlet to measure gas flow data and to emit a voltage signal,

and the voltage control relay is connected with the gas flow sensor to receive the voltage signal, is triggered to interrupt the jet flow when the voltage signal is lower than a lower limit, is triggered to interrupt the jet flow when the voltage signal is lower than a preset value, and delays to start the jet flow when the voltage signal reaches the preset value.

The invention utilizes the small gas bottle as gas supply and controls gas flow through the pressure reducing valve, realizes miniaturization of gas circuit supply, adopts a 12V direct current storage battery as a power supply, converts 12V direct current into 6kV 10.43kHz alternating current through the inverter module and the high-voltage module as excitation, and realizes portability of the whole system. And on this basis, the functions of flow velocity detection and temperature detection are added, the working time of the system is prolonged, the safety of the whole device is greatly improved, and meanwhile, in order to meet different use requirements, a voltage adjusting knob is added, so that the strength of jet flow can be adjusted to a certain degree.

In a preferred embodiment of the portable atmospheric pressure cold plasma jet device, the gas source is a gas cylinder.

In a preferred embodiment of the portable atmospheric pressure cold plasma jet device, the gas cylinder is a steel gas cylinder with the height of 250mm, the radius of 40mm and the capacity of 1L.

In the preferred embodiment of the portable atmospheric pressure cold plasma jet device, the load end of the voltage control relay is connected in the circuit where the high-voltage module is located and is in a normally open state.

In a preferred embodiment of the portable atmospheric pressure cold plasma jet device, the dc battery comprises a 12V, 2.6AH capacity lead acid battery.

In the preferred embodiment of the portable atmospheric pressure cold plasma jet device, the inverter module is 220V power frequency pure sine output and can bear 300W load to the maximum.

In the preferred embodiment of the portable atmospheric pressure cold plasma jet device, the inverter module is provided with an alternating current voltage regulator, so that the output voltage value is regulated between 90 and 220V.

In the preferred embodiment of the portable atmospheric pressure cold plasma jet device, the hollow anode jet device is provided with a temperature probe for monitoring the temperature in real time and a heat dissipation unit.

In a preferred embodiment of the portable atmospheric pressure cold plasma jet device, the portable atmospheric pressure cold plasma jet device further comprises a housing.

In the preferred embodiment of the portable atmospheric pressure cold plasma jet device, the shell is made of polytetrafluoroethylene, and the thickness of the box body is 2 mm.

Referring to fig. 1, in the portable fluidic device, on the air path supply module, because the volume of the whole system needs to be reduced as much as possible, it is impossible to adopt a way of supplying multiple air paths and then controlling the flow rate of each air path by a computer like a laboratory. Simultaneously for the convenience of changing the air supply in order to satisfy different demands, adopt the height to be 40mm radius for the steel gas bottle of 1L of capacity for 250mm as the air supply, come to control working gas's velocity of flow through control flap, when facing different demands, can directly change the gas bottle. Simultaneously in order to prevent that the gas pitcher atmospheric pressure is insufficient to lead to the appearance that the gas velocity of flow can't satisfy the efflux demand condition, increase a small gas flow sensor in the gas circuit, on receiving a voltage control relay with the voltage signal of small gas flowmeter analog output, have voltage signal's detection function, set up the upper and lower limit of the voltage that awaits measuring, can realize that the circuit disconnection is higher than the circuit closure when the voltage is less than the lower limit. The load end of the device is connected in the main circuit and is in a normally open state, and the output voltage of the micro gas flowmeter is used as the voltage to be measured. When the flow velocity of the gas circuit rises to meet the jet flow requirement, the micro gas flow sensor converts the flow velocity into a voltage signal to be output, when the voltage to be measured reaches a set upper limit value, the relay acts in a delayed mode to control the main circuit to be closed, the jet flow starts, and when the flow velocity is too small and the output voltage of the micro gas flow sensor drops to be lower than the set lower limit value, the relay is triggered to act again to disconnect the main circuit and interrupt the jet flow.

A lead-acid storage battery with the voltage of 12V and the capacity of 2.6AH is used on the power supply module, the size is 70mm multiplied by 45mm multiplied by 100mm, the lead-acid storage battery is small in size, and 12V direct current provided by the lead-acid storage battery just meets the requirements of the temperature control module and the flow rate control module on the power supply. The boost inversion module is 220V power frequency pure sine output and can bear 300W load to the maximum extent; an alternating current voltage regulator is adopted to adjust the output voltage value between 90V and 220V; and finally, outputting high-voltage and high-frequency voltage by a high-frequency and high-voltage module with the size of 93mm multiplied by 47mm multiplied by 49 mm. In addition, for preventing the occurrence of overheating damage, a temperature control module is added, the temperature control module comprises a high-precision temperature probe, a temperature control main board and a fan, the temperature is monitored in real time in the operation process, when the temperature of the high-frequency high-voltage module is too high, the fan is started to dissipate heat and cool, and the whole jet system can stably operate for a long time.

Referring to fig. 2, the hollow anode jet device is adopted on the jet generation module, and the two electrode wiring positions and the air inlet of the device are both positioned at the upper end, so that the device is convenient to hold, reduces the risk of electric shock when the electrode is unstable in contact and falls out, and is convenient to use.

In order to further improve the portability of the device, referring to fig. 3, the invention integrates the modules into a whole by designing the structure of the box body. The box body adopts 3d printing technology and adopts polytetrafluoroethylene as a material, and the thickness of the box body is 2 mm; the fan is placed in the box body, and the louver is used for heat dissipation, so that the whole structure of the device is more stable; two exposed control circuits adopt two additional shells for protection, as shown in fig. 3, so that the two exposed control circuits are not exposed outside, and two handles are additionally arranged on two sides below the box body, so that the portable multifunctional electric heating box is convenient to carry.

The invention can realize the generation of plasma plume under the atmospheric pressure environment, can adjust the jet flow length by using the knob according to the requirements, meets different working requirements, has over-temperature protection for the whole device, performs heat dissipation to a certain degree when the temperature of the internal module is overhigh, prolongs the working time, reduces the risk of burning the module, has under-flow protection at the same time, and automatically disconnects the main circuit when the gas in the gas tank is insufficient.

The device is tested, the output voltage is adjusted to be 6kV, the voltage frequency is 10.43kHz, emission spectrum diagnosis is carried out under different gas proportions, and the results are shown in fig. 4(a) to 4(c), and the spectrum line achieves the plasma jet effect in a normal laboratory, so that the device has great application value.

Finally, it should be noted that: the embodiments described are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments in the present application belong to the protection scope of the present application.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.