CN219740699U - Adjustable plasma generating device - Google Patents

Abstract

The utility model relates to an adjustable plasma generating device, comprising: a reaction tube; the electrode groups are positioned in the reaction tube; the electrode group comprises an anode electrode column and a cathode electrode column which are oppositely arranged and have adjustable distances, so that current is formed between the anode electrode column and the cathode electrode column after the electrode group is electrified; a blower, located upstream of the plurality of electrode sets, generates a flow of gas to flow between the anode electrode column and the cathode electrode column in preparation for generating a plurality of sliding arcs. The utility model continuously generates plasma particles in the closed space, continuously increases the concentration gradient, has better stability, and can provide a green, environment-friendly, high-efficiency and residue-free sterilization mode.

Description

Adjustable plasma generating device

Technical Field

The utility model relates to the technical field of air disinfection and sterilization, in particular to an adjustable plasma generating device.

Background

The plasma is an ionized gaseous substance composed of charged ions and neutral particles generated by ionization after an atom or an atomic group loses an electron. The plasma formation is that a substance is heated by an external system, is changed from a solid state into a liquid state and then into a gaseous state molecule, then the energy obtained by the gaseous state molecule is higher than the energy required by ionization of the gaseous state molecule under the action of an excitation source magnetic field, an electric field and an electromagnetic field, so that the out-of-core electrons of the gaseous state molecule are separated from the constraint of atomic nuclei to become free electrons, then the free electrons and the gaseous state molecule are subjected to inelastic collision, the energy is obtained by the molecule, the process of exciting and ionizing active groups is carried out, and the positive and negative charges of the active groups are kept equal in value, so the plasma is called.

The plasma sterilization technology mainly uses ultraviolet rays, charged particles, active particles and other components to sterilize under the combined action. Ultraviolet sterilization utilizes thymine dimer formed when the ultraviolet sterilization reacts with microorganisms to inhibit bacterial replication and prevent the growth and propagation of the thymine dimer. When the electric field generated by the charged particles is strong enough, the protein separation on the surface of the cell membrane generates larger cavities, and plasma can generate ions to destroy the protein and enzyme activity, so that the cytoplasm is lost, and the cell death is caused. The active particles play an important role in the plasma sterilization process, and the active oxygen-containing groups are utilized to destroy the cell walls of microorganisms in the sterilization process, so that the cell walls enter the cells to generate oxidation results after the permeability of cell membranes is further changed, and finally, the cell structures are completely destroyed, and the cells of the microorganisms die, so that the sterilization effect is achieved.

At present, the plasma technology is widely applied to the processing of agricultural and sideline products, food preservation, air sterilization and purification, medical treatment, chemical waste treatment and the like, so that the plasma is widely focused.

The plasma technology can generate different discharge modes due to different excitation modes, different discharge modes can generate different active substances, and the corresponding sterilization effects have larger difference. At present, the common dielectric barrier discharge sterilization has the main components of ozone molecules, has smaller sterilization area, only limits a discharge area, and has harm to human bodies due to sterilization gas, thus being not environment-friendly. The sliding arc discharge of industrial application is characterized by high temperature, low energy utilization rate, small treatment area and insufficient treatment stability; the sterilization purpose is generally achieved by utilizing a high-temperature direct blowing mode of a sliding arc, the electrode structure of the sliding arc discharge is complex, a high-temperature-resistant and water-cooling system is needed, and the manufacturing cost is high. The industrial sliding arc discharge plasma is mainly used for high-temperature combustion, active substances in products have short service lives, air is ionized once, and the sterilizing effect and the sterilizing efficiency are poor.

Disclosure of Invention

In view of the foregoing, the present utility model is directed to an adjustable plasma generating apparatus, which is at least capable of solving one of the above problems.

The aim of the utility model is mainly realized by the following technical scheme:

the utility model provides an adjustable plasma generating device, comprising:

a reaction tube;

the electrode groups are positioned in the reaction tube; the electrode group comprises an anode electrode column and a cathode electrode column which are oppositely arranged and have adjustable distances, so that current is formed between the anode electrode column and the cathode electrode column after the electrode group is electrified;

a blower, located upstream of the plurality of electrode sets, generates a flow of gas to flow between the anode electrode column and the cathode electrode column in preparation for generating a plurality of sliding arcs.

Further, the anode electrode column comprises an anode connecting end and an anode discharging end, and the anode connecting end is connected with the pipe wall of the reaction pipe through a first adjusting element;

the cathode electrode column comprises a cathode connecting end and a cathode discharging end, and the cathode connecting end is connected with the pipe wall of the reaction pipe through a second adjusting element;

the anode discharge end and the cathode discharge end are arranged opposite to each other;

the first adjusting element or/and the second adjusting element is/are operable to control the distance between the anode discharge end and the cathode discharge end;

preferably, the anode electrode column is detachably connected with the reaction tube through a first adjusting element; the cathode electrode column is detachably connected with the reaction tube through a second adjusting element.

Further, the reaction tube is rectilinear in shape.

Further, the adjustable plasma generating device further comprises a fixing piece, wherein the fixing piece comprises a base and a clamping part, and the clamping part is vertically connected with the base;

the reaction tube is detachably arranged in the clamping part.

Further, the reaction tube is in an arch shape;

the reaction tube comprises four transverse tube parts which are arranged in parallel and three vertical tube parts which are connected with the transverse tube parts, and the central line of the vertical tube parts is vertical to the transverse tube parts.

Further, when the number of electrode groups is equal to or less than four, the electrode groups are disposed in different lateral tube portions.

Further, the adjustable plasma generating device further comprises a fixing frame, wherein the fixing frame comprises a base and four fixing parts, and the fixing parts are connected with the base;

the four transverse tube parts of the reaction tube are respectively detachably arranged on the four fixing parts.

Further, the reaction tube comprises an air inlet and an air outlet;

the air blower is located at the air inlet.

Further, the adjustable plasma generating device further comprises a plurality of power supplies, and the number of the power supplies is equal to that of the electrode groups;

the power supply is connected with the electrode groups in a one-to-one correspondence manner so as to supply electric energy for the electrode groups.

Further, the adjustable plasma generating device also comprises a reaction chamber, and the reaction tube and the blower are positioned in the reaction chamber.

Compared with the prior art, the utility model has at least one of the following beneficial effects:

(1) The structure is simple, different gases are repeatedly ionized in the closed space, the concentration of free radical active particles is increased, more than ten active particles are generated in the sliding arc discharge process, the active gas comprises more than twenty chemical reactions, the main generated active gas comprises hydrogen peroxide, ozone, nitrogen oxides and the like, and the active ions comprise hydroxyl free radicals, oxygen free radicals and the like;

(2) A plurality of pairs of electrodes are arranged in the reaction tube, so that a plurality of plasma arcs can be generated in the tube, and on one hand, the sterilization effect of the device is improved; on the other hand, more active particles can be generated in a short time by matching with the screened electrodes and used for subsequent sterilization and fresh-keeping of foods and cold chain logistics, so that the cost is saved and the efficiency is improved;

(3) The utility model continuously generates plasma particles in the closed space, continuously increases the concentration gradient, has better stability, and can provide a green, environment-friendly, high-efficiency and residue-free sterilization mode.

In the utility model, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, like reference numerals being used to refer to like parts throughout the several views.

FIG. 1 is a schematic diagram of an adjustable plasma generator in an embodiment;

fig. 2 is a schematic view of another structure of the adjustable plasma generator according to the embodiment.

Reference numerals:

1-a reaction tube; 101-an air inlet; 102-an air outlet; 11-a fixing piece; 111-a base; 112-a clamping portion; 12-fixing frame; 121-a base; 122-a fixing part; 2-electrode group; 3-a blower; 4-a power supply; a 5-reaction chamber; 6-a controller.

Detailed Description

The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "coupled" should be interpreted broadly, for example, as being fixedly coupled, as being detachably coupled, as being integrally coupled, as being mechanically coupled, as being electrically coupled, as being directly coupled, as being indirectly coupled via an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout the description to refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.

The working surface of the utility model can be a plane or a curved surface, and can be inclined or horizontal. For convenience of explanation, the embodiments of the present utility model are placed on a horizontal plane and used on the horizontal plane, and thus "up and down" and "up and down" are defined.

In one embodiment of the present utility model, an adjustable plasma generating apparatus is disclosed, as shown in fig. 1 to 2, comprising:

a reaction tube 1;

a plurality of electrode groups 2 positioned in the reaction tube; the electrode group 2 comprises an anode electrode column and a cathode electrode column which are oppositely arranged and have adjustable distances, so that current is formed between the anode electrode column and the cathode electrode column after the power is electrified;

the blower 3 is located upstream of the multiple groups of electrode groups 2 and generates air flow flowing between the anode electrode columns and the cathode electrode columns so as to generate multiple sliding arcs, and the multiple sliding arcs are in one-to-one correspondence with the multiple groups of electrode groups 2, namely one group of electrode groups 2 generates one sliding arc.

According to the adjustable plasma generating device, the plurality of groups of electrode groups 2 with adjustable electrode column spacing are arranged in the reaction tube 1, on one hand, when the adjustable plasma generating device works, the air blower 3 is started to enable air flow to pass through the plurality of groups of electrode groups to generate a plurality of sliding electric arcs, more active particles of plasma sterilizing and sterilizing free radicals (such as hydroxyl free radicals) with higher density are generated in a short time, and meanwhile, the stability of the free radical active particles can be improved, so that the sterilizing and sterilizing efficiency and stability of the adjustable plasma generating device are greatly improved; on the other hand, the distance between the anode electrode column and the cathode electrode column of each electrode group 2 is adjustable, so that parameters (such as arc length, arc intensity and the like) of the sliding arc generated by the electrode groups 2 can be adjusted, and further the sterilization effect of the whole adjustable plasma generating device is adjusted.

The anode electrode column comprises an anode connecting end and an anode discharging end, and the anode connecting end is connected with the pipe wall of the reaction pipe through a first adjusting element; the cathode electrode column comprises a cathode connecting end and a cathode discharging end, and the cathode connecting end is connected with the pipe wall of the reaction pipe through a second adjusting element; the anode discharge end and the cathode discharge end are arranged opposite to each other; the first adjustment element or/and the second adjustment element is operable to control a distance between the anode discharge end and the cathode discharge end.

It should be noted that, the anode discharge end and the cathode discharge end are all located in the reaction tube 1 all the time, and the distance between the anode discharge end and the cathode discharge end of each group of electrode groups is adjustable, in this embodiment, the distance between the anode discharge end and the cathode discharge end is adjusted within the range of 5mm-70 mm. The central axes of at least the anode discharge end and the cathode discharge end in each electrode group 2 are coincident and are vertical to the center of the reaction tube 1.

Further preferably, the anode electrode column and the cathode electrode column are detachably connected with the reaction tube through a first adjusting element and a second adjusting element respectively, so that the electrode group can be maintained and replaced later.

The electrode groups 2 are preferably identical in structure, and the electrode columns (including anode electrode columns and cathode electrode columns) may be made of various metal materials, for example: bronze, beryllium copper, brass, tungsten, nickel, molybdenum, titanium, iron, stainless steel, and the like; each metal material has a hot spot, the color and the size of the sliding arc generated by discharge are different, and two groups, three groups or more electrode groups can be arranged in the reaction tube 1 for generating the plasma arc. The electrode column metal materials of the plurality of groups of electrode groups 2 may be the same or different, or the electrode column metal materials of part of the electrode groups 2 may be the same or the metal materials of part of the electrode groups 2 may be different.

The more the types of electrode column metal materials of the plurality of groups of electrode groups 2 in the adjustable plasma generating device are, the more the types of generated free radical active particles are, and the wider the sterilization range is; the more the number of the electrode groups 2 of the same metal material is, the higher the concentration of the active particles generating corresponding free radicals is, and the stronger the sterilization effect is. The user can set the proper metal type and number of the motor groups 2 according to the application scene of the adjustable plasma generating device.

In order to ensure that the air flow generated by the air blower 3 is guided to the electrode group 2 as much as possible, the air blower 3 is positioned in the reaction tube 1, on one hand, the reaction tube 1 limits the air flow generated by the air blower 3, and unnecessary leakage is avoided; on the other hand, the reaction tube 1 guides the air flow generated by the blower 3 so as to pass through the plurality of electrode groups 2 in the reaction tube 1 in sequence.

In the embodiment, the blower 3 is a fan, the flow speed of air flow blown out by the fan is 3m/s-21m/s, and the arc length of the blown-out sliding arc is 1cm-8cm. The speed of plasma excitation can be controlled by controlling the air flow speed of the fan, the higher the air speed is, the faster the plasma excitation speed is, but the unstable discharge arc can be caused to break, the ionization efficiency can be reduced due to the fact that the air speed is too low, and less active ingredients are generated.

According to one embodiment of the present utility model, the reaction tube 1 is in a straight shape, and the plurality of electrode groups 2 are sequentially disposed downstream of the blower 3, as shown in fig. 1, and two electrode groups 2 are disposed in the reaction tube 1 and sequentially disposed downstream of the blower 3.

In order to fix the linear reaction tube 1 conveniently, the adjustable plasma generating device also comprises a T-shaped fixing piece 11, wherein the fixing piece 11 comprises a base 111 and a clamping part 112, and the clamping part is vertically connected with the base; the reaction tube is detachably arranged in the clamping part. To secure the stability of the reaction tube 1, the clamping portion 112 is clamped at the center of gravity of the reaction tube 1.

According to one embodiment of the present utility model, the reaction tube is in the shape of an "arch", and the plurality of electrode groups 2 are sequentially disposed downstream of the blower 3, as shown in fig. 2, specifically, the reaction tube 1 includes four horizontal tube portions disposed in parallel and three vertical tube portions connected to the horizontal tube portions, and the central line of the vertical tube portions is perpendicular to the horizontal tube portions. When the number of the electrode groups 2 is equal to or less than four, the electrode groups 2 are disposed in different lateral tube portions.

For the convenience of fixing the reaction tube 1 in the shape of an arc, the adjustable plasma generating device further comprises a fixing frame 12, the fixing frame 12 comprises a base 121 and four fixing portions 122, the fixing portions 122 are connected with the base 121, and four transverse tube portions of the reaction tube 1 are detachably arranged on the four fixing portions 122 respectively.

The reaction tube 1 comprises an air inlet 101 and an air outlet 102, and the blower 3 is positioned in the reaction tube 1 and is close to the air inlet 101. The reaction tube 1 is preferably an insulating high-temperature-resistant tube, can resist the high temperature of 2000 ℃ above the center of the sliding arc, and is favorable for maintaining stable discharge.

In the embodiment, the inner diameter of the reaction tube is 10mm-100mm, and the distance between the electrode group 2 and the two ends of the reaction tube 1 is larger than 1cm, so that the heat can be diffused, and the discharge safety is ensured.

The adjustable plasma generating device further comprises a plurality of power supplies 4, the number of the power supplies 4 is equal to that of the electrode groups 2, the power supplies are connected with the electrode groups in a one-to-one correspondence mode, so that electric energy is supplied to the electrode groups, namely, the electrode groups are supplied with proper high voltage, independent power supply is ensured, and once a circuit fails, all the electrode groups 2 cannot work normally, so that the adjustable plasma generating device cannot perform continuous and effective disinfection.

Preferably, the power supply 4 is a high-voltage power supply, and the power supply 4 is connected with the electrode group 2 through a wire, that is, an anode electrode column and a cathode electrode column of the electrode group are respectively connected with the anode and the cathode of the power supply through wires. Further preferably, the power supply is a direct current power supply, so that stability of the sliding arc is ensured, and a more stable electrolysis effect is achieved. Still further preferably, the voltage of the power supply is adjustable, and the power of the sliding arc can be regulated by the voltage of the high-voltage power supply.

Further preferably, the power supply 4 comprises a direct current power supply and a variable frequency power supply, wherein the output voltage of the direct current power supply is 2kV-20kV, and the rated power is 10-1500W; the input power supply voltage is 12V-60V.

The adjustable plasma generating device also comprises a reaction chamber 5, the reaction tube 1 and the blower 3 are positioned in the reaction chamber 5, the free radical active particles of the sliding arc ionized air are filled into the reaction chamber 5 after coming out of the reaction tube 1, a free radical active particle atmosphere with a certain concentration is formed in the reaction chamber 5, and all objects to be disinfected and sterilized in the reaction chamber 5 can be disinfected and sterilized, or the gas containing the free radical active particles with a certain concentration in the reaction chamber 5 is led into a place where the disinfection and sterilization are needed, so that the disinfection and sterilization treatment can be carried out on the place.

The reaction chamber 5 refers to a container or room comprising a closed cavity. Preferably, the reaction chamber 5 is provided with an openable and closable air inlet and air outlet (the air inlet and the air outlet are not shown in the drawing) which are communicated with the closed cavity, the air inlet is used for filling gas (the type of the gas is selected according to the sterilization requirement) into the closed cavity, for example, one or more of nitrogen, oxygen, argon, helium, air and the like can be injected into the reaction chamber 5 through the air inlet; the exhaust port is used for exhausting the gas with sterilizing effect after the sliding arc electrolysis, and the exhausted gas can be led into the environment needing sterilizing. That is, the reaction chamber 5 can controllably perform the replenishment or replacement of the air source and the output of the sterilizing gas through the openable and closable air inlet and air outlet. It is further preferred that the reaction chamber 5 is made of a material resistant to corrosion and high temperature, or the inner wall of the reaction chamber 5 is made of a material resistant to corrosion and high temperature, for example, an acrylic plate, a glass sheet, tetrafluoroethylene, ceramic, etc., so as to ensure that the reaction chamber 5 is not easily deformed and damaged, and ensure structural stability of the reaction chamber 5.

The adjustable plasma generating device further comprises a controller 6, wherein the controller 6 is electrically connected with the power supply 4 and the electrode group 2 so as to control the power supply voltage, the power and the like of the electrode group 2 and control the use process of the whole adjustable plasma generating device.

The adjustable plasma generating device of the utility model ionizes different gases for multiple times in the closed space, and increases the concentration of free radical active particles. It is verified that when the hydroxyl radical and hydrogen peroxide reach a certain content, the hydroxyl radical and hydrogen peroxide in the space reach a stable state and cannot be dissipated in a short time. Through the work of the device, a large amount of stable plasma active particles can be generated in a short time, and powerful guarantee is provided for sterilization and disinfection in a subsequent area and outside the area.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.

Claims (11)

1. An adjustable plasma generator, comprising:

a reaction tube;

the electrode groups are positioned in the reaction tube; the electrode group comprises an anode electrode column and a cathode electrode column which are oppositely arranged and have adjustable distances, so that current is formed between the anode electrode column and the cathode electrode column after the electrode group is electrified;

a blower, located upstream of the plurality of electrode sets, generates a flow of gas to flow between the anode electrode column and the cathode electrode column in preparation for generating a plurality of sliding arcs.

2. The adjustable plasma generator according to claim 1, wherein the anode electrode column comprises an anode connection end and an anode discharge end, the anode connection end being connected to the wall of the reaction tube by a first adjustment element;

the cathode electrode column comprises a cathode connecting end and a cathode discharging end, and the cathode connecting end is connected with the pipe wall of the reaction pipe through a second adjusting element;

the anode discharge end and the cathode discharge end are arranged opposite to each other;

the first adjustment element or/and the second adjustment element is operable to control a distance between the anode discharge end and the cathode discharge end.

3. The adjustable plasma generator according to claim 2, wherein the anode electrode column is detachably connected to the reaction tube by a first adjustment member; the cathode electrode column is detachably connected with the reaction tube through a second adjusting element.

4. The adjustable plasma generator according to claim 1 or 2, wherein the reaction tube is rectilinear in shape.

5. The adjustable plasma generator according to claim 4, further comprising a fixture, the fixture comprising a base and a clamping portion, the clamping portion being vertically connected to the base;

the reaction tube is detachably arranged in the clamping part.

6. The adjustable plasma generator according to claim 1 or 2, wherein the reaction tube has a "bow" shape;

the reaction tube comprises four transverse tube parts which are arranged in parallel and three vertical tube parts which are connected with the transverse tube parts, and the central line of the vertical tube parts is vertical to the transverse tube parts.

7. The adjustable plasma generator according to claim 6, wherein when the number of electrode groups is equal to or less than four, the electrode groups are disposed in different lateral tube portions.

8. The adjustable plasma generator according to claim 7, further comprising a mount comprising a base and four fixtures, the fixtures being connected to the base;

the four transverse tube parts of the reaction tube are respectively detachably arranged on the four fixing parts.

9. The adjustable plasma generator according to claim 1, wherein the reaction tube comprises an air inlet and an air outlet;

the air blower is located at the air inlet.

10. The adjustable plasma generator according to claim 1, further comprising a plurality of power sources, the number of power sources being equal to the number of electrode sets;

the power supply is connected with the electrode groups in a one-to-one correspondence manner so as to supply electric energy for the electrode groups.

11. The adjustable plasma generator of claim 1, further comprising a reaction chamber, said reaction tube and blower being located within said reaction chamber.