CN219068443U - Plasma jet generating assembly and skin therapeutic apparatus - Google Patents

Abstract

The utility model relates to the technical field of plasmas, in particular to a plasma jet generating assembly and a skin therapeutic apparatus, wherein the plasma jet generating assembly is provided with a shell and an ionization unit; the shell is provided with a gas channel, a containing cavity and an ionization cavity, the containing cavity is isolated from the ionization cavity, the gas channel is isolated from the containing cavity, and the gas channel is communicated with the ionization cavity; the ionization unit is provided with a high-voltage input piece and N discharge electrodes, wherein N is an integer greater than 1; the first end of the discharge electrode is accommodated in the accommodating cavity and is connected with the high-voltage input piece; the second end of the discharge electrode is accommodated in the ionization chamber. Working gas flows into the ionization cavity through the gas channel and is ionized by the second end of the discharge electrode arranged in the ionization cavity to form plasma jet flow, medium does not need to be arranged for blocking, and larger discharge voltage can be generated, provided energy is higher, and ionization efficiency is higher under the condition of being connected with the same high-voltage power supply.

Description

Plasma jet generating assembly and skin therapeutic apparatus

Technical Field

The utility model relates to the technical field of plasmas, in particular to a plasma jet generation assembly and a skin therapeutic apparatus.

Background

The plasma is an ionized gaseous substance composed of positive and negative electrons generated by ionization of atoms, which are atoms of which some electrons are deprived, and is called a fourth state in which the substance exists except solid, liquid and gas. The plasma contains electron excited atoms or molecules and chemical active substances such as photons, ions and free radicals, and can be used for sterilizing skin wound surface or skin surface by utilizing the action of the active substances and the skin wound surface or skin surface to treat skin wound and skin inflammation, and in addition, the plasma energy thermal effect is utilized to act on the skin surface to promote skin repair, so that the effects of resisting skin aging, treating hemorrhoids and scar and the like are realized.

Based on various effects of plasma on skin, skin therapeutic apparatuses for treating skin diseases and improving skin by generating plasma start to appear on the market, but most of the plasma skin therapeutic apparatuses adopt a dielectric barrier technology to generate plasma, for example, CN209474789U discloses a plasma skin therapeutic apparatus and a handle assembly thereof, and the plasma is generated by a dielectric barrier discharge technology to repair tissue wounds and the like. The dielectric barrier discharge is adopted to set the insulating layer for blocking, and the insulating dielectric barrier is adopted to block, so that the discharge voltage of the discharge assembly can be correspondingly reduced, the provided energy is lower, and the ionization efficiency is low.

Disclosure of Invention

The utility model provides a plasma jet generating component and a skin therapeutic apparatus, which are used for solving the technical problems that a plasma skin therapeutic apparatus in the prior art adopts a dielectric barrier discharge technology to generate plasma, the discharge voltage of a discharge electrode is small, the provided energy is low and the ionization efficiency is low.

A first aspect of the utility model provides a plasma jet generating assembly comprising:

a housing and an ionization unit;

the shell is provided with a gas channel, a containing cavity and an ionization cavity, wherein the containing cavity is mutually isolated from the ionization cavity, the gas channel is mutually isolated from the containing cavity, and the gas channel is communicated with the ionization cavity;

the ionization unit is provided with a high-voltage input piece and N discharge electrodes, wherein N is an integer greater than 1;

the first end of the discharge electrode is accommodated in the accommodating cavity and is connected with the high-voltage input piece;

the second end of the discharge electrode is accommodated in the ionization chamber.

In a first possible implementation of the first aspect, the first ends of the N discharge electrodes are connected in parallel;

n discharge electrodes are arranged in parallel at intervals;

the second ends of the N discharge electrodes are flush.

In a second possible implementation of the first aspect, the discharge electrode is in a needle-like structure.

With reference to the second possible implementation of the first aspect, in a third possible implementation of the first aspect, the discharge electrode is composed of tungsten, molybdenum, copper, aluminum, titanium alloy, or stainless steel.

In a fourth possible implementation of the first aspect, the ionization unit is further provided with N current limiting members connected between the high voltage input member and the discharge electrode;

the N current limiting pieces are respectively in one-to-one correspondence with the N discharge electrodes.

With reference to the fourth possible implementation of the first aspect, in a fifth possible implementation of the first aspect, the current limiter is a resistor or a combination of a resistor and a capacitor.

With reference to the fourth possible implementation of the first aspect, in a sixth possible implementation of the first aspect, the ionization unit is further provided with a conductive limiter;

one end of the limiting piece is inserted with the current limiting piece, and the other end of the limiting piece is inserted with the first end of the discharge electrode.

With reference to the sixth possible implementation component of the first aspect, in a seventh possible implementation component of the first aspect, the limiting element has a cylindrical structure;

the cylinder structure has one end with the jack matching with the current limiter and the other end with the jack matching with the first end of the discharge electrode.

With reference to the fourth possible implementation component of the first aspect, in an eighth possible implementation component of the first aspect, the ionization unit is further provided with a PCB adapter plate;

one end of the PCB adapter plate is connected with the high-voltage input piece, and the other end of the PCB adapter plate is connected with the current limiting piece.

With reference to any one of the foregoing possible assemblies of the first aspect, in a ninth possible assembly of the first aspect, the housing is provided with a front case, a rear case, a partition, and an air intake pipe;

the front shell is externally connected with the first end of the rear shell and is provided with a port for connecting with an air inlet pipe;

the separator is connected to the first end of the rear shell in an inscription manner and is provided with a first through hole for the discharge electrode to pass through;

the front shell is provided with a second through hole for the plasma to jet out;

the air inlet pipe is arranged outside the rear shell.

With reference to the ninth possible implementation of the first aspect, in the tenth possible implementation of the first aspect, the housing is further provided with an insulating tube sleeved outside the air inlet tube.

With reference to the tenth possible implementation of the first aspect, in an eleventh possible implementation of the first aspect, the rear housing is provided with a slot;

the insulating tube is accommodated in the clamping groove.

With reference to the ninth possible implementation component of the first aspect, in a twelfth possible implementation component of the first aspect, the rear shell is a circular groove structure;

the open end of the rear shell is provided with external threads, and the bottom wall of the tank of the rear shell is provided with a third through hole for the high-voltage input piece to pass through;

the front shell is of a stepped circular groove structure and is provided with an internal thread which is matched with the external thread;

the isolating piece is of a circular groove structure with the outer diameter equal to the inner diameter of the rear shell;

the first through hole is formed in the bottom wall of the isolation piece.

In combination with any one of the first to eighth possible implementation components of the first aspect, in a thirteenth possible implementation component of the aspect, the case is provided with a front case, a rear case, a spacer, and a spacer;

the front shell is connected with the first end of the rear shell and is provided with a second through hole for the plasma to jet out;

the partition piece is arranged in the rear shell and divides the shell inner space of the rear shell into the gas channel and the accommodating cavity;

the separator is connected to one end of the separator near the first end of the rear shell and is provided with a first through hole for the discharge electrode to pass through.

With reference to the thirteenth possible implementation component of the first aspect, in the fourteenth possible implementation component of the first aspect, the rear shell is of a circular groove structure, a third through hole and a fourth through hole are formed in a groove bottom wall of the rear shell, the third through hole corresponds to the accommodating cavity, and the fourth through hole corresponds to the gas channel;

the high-voltage input piece is arranged through the third through hole;

the partition piece is of a straight cylinder structure with the diameter smaller than the inner diameter of the rear shell;

the isolating piece is of a round groove structure;

the first through hole is formed in the bottom wall of the isolation piece.

In a second aspect, the present utility model provides a skin treatment apparatus comprising:

a plasma jet generating assembly of any one of the possible implementations provided in the first aspect.

From the above technical solutions, the embodiment of the present utility model has the following advantages:

the utility model provides a plasma jet generating component, which is provided with a shell and an ionization unit; the shell is provided with a gas channel, a containing cavity and an ionization cavity, the containing cavity is isolated from the ionization cavity, the gas channel is isolated from the containing cavity, and the gas channel is communicated with the ionization cavity; the ionization unit is provided with a high-voltage input piece and N discharge electrodes, wherein N is an integer greater than 1; the first end of the discharge electrode is accommodated in the accommodating cavity and is connected with the high-voltage input piece; the second end of the discharge electrode is accommodated in the ionization chamber. Working gas flows into the ionization cavity through the gas channel and is ionized by the second end of the discharge electrode arranged in the ionization cavity to form plasma jet, a medium is not required to be arranged for blocking, and under the condition of being connected with the same high-voltage power supply, compared with the discharge voltage of the plasma jet generating component adopting the medium blocking, the discharge electrode in the plasma jet generating component provided by the utility model is larger, the provided energy is also higher, and the ionization efficiency is higher.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is an exploded view of a plasma jet generating assembly provided in an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of one of the plasma jet generating assemblies shown in FIG. 1;

FIG. 3 is an exploded view of a plasma jet generating assembly provided in an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of one plasma jet generation assembly shown;

wherein:

11. front shell 111, second through hole 112 and right angle pipeline

113. Connection port 114, second hook 12, and rear case

121. Clamping groove 122, external thread 123 and third through hole

124. Fourth through hole 125, first hook 13 and spacer

131. First through hole 14, air inlet pipe 15 and insulating pipe

16. Separator 17, sealing ring 21, high pressure input member

22. Discharge electrode 23, current limiter 24, and limiter

25. PCB interposer 26, circular metal wire.

Detailed Description

The embodiment of the utility model provides a plasma jet generating component and a skin therapeutic apparatus, which are used for solving the technical problems that a plasma skin therapeutic apparatus in the prior art adopts a dielectric barrier discharge technology to generate plasma, the discharge voltage of a discharge electrode is small, and the provided energy and ionization efficiency are low.

In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the embodiments described below are only some embodiments of the present utility model, not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the embodiments of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, interchangeably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.

Based on various effects of plasma on skin, skin therapeutic apparatuses for treating skin diseases and improving skin by generating plasma start to appear on the market, but most of the plasma skin therapeutic apparatuses adopt a dielectric barrier technology to generate plasma, for example, CN209474789U discloses a plasma skin therapeutic apparatus and a handle assembly thereof, and the plasma is generated by a dielectric barrier discharge technology to repair tissue wounds and the like. The dielectric barrier discharge is adopted to set the insulating layer for blocking, and the insulating dielectric barrier is adopted to block, so that the discharge voltage of the discharge assembly can be correspondingly reduced, the provided energy is lower, and the ionization efficiency is low.

Example 1

Referring to fig. 1 to 4, an embodiment of the present utility model provides a plasma jet generating assembly, including:

a housing and an ionization unit; the shell is provided with a gas channel, a containing cavity and an ionization cavity, the containing cavity is isolated from the ionization cavity, the gas channel is isolated from the containing cavity, and the gas channel is communicated with the ionization cavity; the ionization unit is provided with a high voltage input 21 and N discharge electrodes 22, N being an integer greater than 1; the first end of the discharge electrode 22 is accommodated in the accommodating cavity and is connected with the high-voltage input piece 21; the second end of the discharge electrode 22 is received in the ionization chamber.

It should be noted that: the shell is used for enclosing the synthesis gas channel, the accommodating cavity and the ionization cavity, can be of an integrated structure, and can also be formed by assembling a plurality of structural members, and the shape of the shell is determined by the shapes of the gas channel, the accommodating cavity and the ionization cavity.

The gas channel is used for introducing working gas into the ionization cavity, so that the gas channel is required to be communicated with the ionization cavity, and in order to avoid that the working gas is ionized before entering the ionization cavity, so that plasma jet electric arcs cannot be emitted or the plasma jet electric arcs are unstable, the gas channel is required to be isolated from the accommodating cavity, the current in the accommodating cavity is ensured not to act on the working gas, the shape of the gas channel is not particularly limited, only the smooth introduction of the working gas is required to be ensured, the working gas can be introduced into the gas channel, the gas channel can be a straight channel or a curved channel, and the cross section of the gas channel can be round, square, diamond or the like.

The shape of the accommodating cavity is not particularly limited, and the naturally-state ionizing unit can be completely accommodated, so that the accommodating cavity and the ionizing cavity are required to be set to be isolated in order to avoid unstable plasma jet electric arcs which cannot be emitted or plasma jet electric arcs caused by ionization of the working gas flowing into the accommodating cavity after entering the ionizing cavity and avoid backflow of the ionized working gas to the accommodating cavity.

The ionization chamber is a space for ionizing the working gas, and its shape is not particularly limited, but needs to cooperate with the discharge electrode 22 to ensure that the working gas introduced therein can be sufficiently ionized.

The ionization unit is used for ionizing the working gas entering the ionization cavity, and the high-voltage input piece 21 on the ionization unit is used for communicating the discharge electrode 22 with a high-voltage power supply so that the discharge electrode 22 can have a voltage capable of ionizing the working gas; the discharge electrode 22 is used for discharging the skin to ionize the working gas entering the ionization chamber, the ionized working gas is emitted from the ionization chamber to form a plasma jet, the shape of the discharge electrode 22 is not particularly limited, and any device or structure capable of discharging the skin under high-voltage excitation can be adopted, such as a tip structure or a carbon brush.

The beneficial effects of this embodiment include:

the utility model provides a plasma jet generating component, which is provided with a shell and an ionization unit; the shell is provided with a gas channel, a containing cavity and an ionization cavity, the containing cavity is isolated from the ionization cavity, the gas channel is isolated from the containing cavity, and the gas channel is communicated with the ionization cavity; the ionization unit is provided with a high voltage input 21 and N discharge electrodes 22, N being an integer greater than 1; the first end of the discharge electrode 22 is accommodated in the accommodating cavity and is connected with the high-voltage input piece 21; the second end of the discharge electrode 22 is received in the ionization chamber. Working gas flows into the ionization cavity through the gas channel and is ionized by the second end of the discharge electrode 22 arranged in the ionization cavity to form plasma jet, medium is not required to be arranged for blocking, and under the condition of being connected with the same high-voltage power supply, compared with the discharge voltage of the plasma jet generating component adopting medium blocking, the discharge electrode in the plasma jet generating component provided by the utility model is larger in discharge voltage, higher in provided energy and higher in ionization efficiency.

Meanwhile, the array arrangement of the discharge electrodes enables the plasma jet generating assembly to generate uniform plasma jet.

In addition, the dielectric is not required to be arranged for blocking, so that the amplitude requirement of the excitation voltage can be reduced, the requirement on the voltage-resistant insulation performance of the insulating material forming the plasma jet generating component is correspondingly reduced, and the manufacturing cost is reduced.

One preferred embodiment of the discharge electrode 22: first ends of the N discharge electrodes 22 are connected in parallel; the N discharge electrodes 22 are arranged in parallel at intervals; the second ends of the N discharge electrodes 22 are flush. By providing a plurality of discharge electrodes 22 to ionize the working gas in the ionization chamber at the same time, not only the ionization effect but also the ionization efficiency can be improved, ensuring that a high-quality plasma jet can be formed.

Optionally: the discharge electrode 22 has a needle-like structure made of tungsten, molybdenum, copper, aluminum, titanium alloy, or stainless steel. The discharge electrode 22 is used for discharging the skin, so that the working gas in the ionization cavity is ionized to generate plasma jet, and the discharge electrode 22 is easily oxidized at high pressure, so that tungsten, molybdenum, copper or stainless steel with good oxidation resistance is selected for manufacturing the discharge electrode 22, and the service life of the discharge electrode 22 can be effectively prolonged. Meanwhile, the adoption of the needle-like structure for the discharge electrode 22 has a certain advantage over other structures. The jet flow plasma with the needle electrode structure can show the characteristic of strong breakdown at the discharge head, and under the same discharge voltage, the energy is accumulated at the needle electrode head, so that the generated jet flow plasma energy is stronger; in structure, the amount of carrier gas required by the needle-plate jet plasma discharge is smaller, each needle electrode corresponds to a gas channel, the surface area of the needle electrode is smaller, the storage capacitance is smaller, the electrification is easier, when the carrier gas flows to the needle head part through the needle tail part, the carrier gas uniformly completes the complex process from corona discharge to jet discharge, the gas is thoroughly reformed by discharge, rich plasmas are generated, and the generated jet is more stable.

Exemplary: the discharge electrode 22 is a needle-like structure made of tungsten, the tip end of the needle-like structure is a second end, the other end is a first end, and the tips of 7 needle-like structures with consistent lengths and shapes pass through the first through holes 131,7 on the separator 13 from the side close to the rear shell 12 to the side close to the front shell 11 to be parallel to each other, and the tips are positioned on the same plane of the ionization chamber.

A preferred embodiment of the ionization cell: the ionization unit is also provided with N current limiting members 23 connected between the high voltage input member 21 and the discharge electrode 22; the N current limiting members 23 are respectively in one-to-one correspondence with the N discharge electrodes 22. The current limiting member 23 plays a role of current limiting, and plasma can be safely and stably generated by connecting one current limiting member 23 in series to the input end of each discharge electrode 22 so that the current reaching the discharge electrode 22 reaches the therapeutic current range.

Optionally: the current limiter 23 may be a resistor, which may be a non-inductive resistor, a carbon film resistor or a metal film resistor, and may be formed by connecting a capacitor and a resistor in parallel.

Exemplary: the current limiting piece 23 is a cylindrical resistor extending along the direction from the rear shell 12 to the front shell 11, the axes of 7 resistors with the same shape and size and electrical property are mutually parallel, the input ends are positioned on the same horizontal plane, 6 resistors are circumferentially and uniformly distributed on the plane vertical to the extending direction, the other resistor is positioned at the central position of the 6 resistors, the central position of the input end of the resistor is connected with a circular metal wire 26 extending along the direction from the rear shell 12 to the front shell 11, the circular metal wire 26 is connected with a PCB adapter plate 25, the central position of the output end of the resistor is connected with a circular metal wire 26 extending along the direction from the rear shell 12 to the front shell 11, the circular metal wire 26 is connected with the limiting piece 24, the lengths of the circular metal wires 26 on the same side of different resistors are uniform, and certain rigidity and strength of the circular metal wire 26 are required to be ensured so as to ensure that deformation cannot occur after connection.

Optimization of the ionization cell described above: the ionization cell is also provided with a conductive stop 24; one end of the limiting member 24 is inserted into the current limiting member 23, and the other end is inserted into the first end of the discharge electrode 22. The limiting piece 24 is additionally arranged to connect the current limiting piece 23 and the discharge electrode 22, so that the discharge electrode 22 and the current limiting piece 23 can be quickly connected in a plugging mode, and compared with the method that the output end of the current limiting piece 23 is directly welded with the input end of the discharge electrode 22, the manufacturing difficulty is reduced, and the production efficiency can be improved. Meanwhile, when the number of the discharge electrodes 22 is multiple, the current limiting piece 23 and the discharge electrodes 22 are connected by adopting the limiting pieces 24 with the same specification, so that the output ends of the discharge electrodes 22 are positioned on the same plane of the ionization chamber, and the conditions of inconsistent arc lengths and uneven arc are avoided.

Exemplary: the limiting piece 24 made of a conductor is of a cylindrical structure extending along the direction from the rear shell 12 to the front shell 11; a circular jack matched with the circular metal wire 26 of the output end of the current limiter 23 is formed in the central position of one flat end surface of the cylindrical structure in the extending direction, the circular metal wire 26 is inserted into the jack in an interference fit mode, a circular jack matched with the first end of the discharge electrode 22 is formed in the central position of the other flat end surface of the cylindrical structure in the extending direction, and the input end of the discharge electrode 22 is inserted into the jack in an interference fit mode; the number of the cylindrical structures is 7, the 7 cylindrical structures with the same shape and size are in one-to-one correspondence with the 7 cylindrical resistors, and the axes of the corresponding cylindrical structures and the cylindrical resistors are collinear.

Further optimization of the aforementioned ionization cell: the ionization unit is also provided with a PCB adapter plate 25; one end of the PCB adapter plate 25 is connected to the high voltage input member 21, and the other end is connected to the current limiter 23. By connecting the input end of the PCB adapter plate 25 with the output end of the high voltage input member 21 and connecting the output end of the PCB adapter plate 25 with the input ends of the plurality of current limiting members 23 in parallel, it is ensured that the same voltage is provided for each discharge electrode 22, and an arc having a uniform length can be generated.

Exemplary: the high voltage input member 21 is a high voltage power line; the PCB adapter plate 25 is a circular plate structure, an input end of which is connected with an output end of the high-voltage power transmission line in a welding manner, and an output end of which is connected with input ends of a plurality of resistors in parallel in a welding manner.

First preferred embodiment of the housing: the housing is provided with a front shell 11, a rear shell 12, a spacer 13 and an air inlet pipe 14; the front shell 11 is externally connected with the first end of the rear shell 12 and is provided with a port 113 for connecting with the air inlet pipe 14; the separator 13 is inscribed at the first end of the rear case 12 and is provided with a first through hole 131 for the discharge electrode 22 to pass through; the front shell 11 is provided with a second through hole 111 for the plasma to be emitted; the air intake pipe 14 is provided outside the rear case 12. The rear shell 12 and the isolating piece 13 enclose a containing cavity, the isolating piece 13 and the front shell 11 enclose an ionization cavity, the air inlet pipe 14 encloses a synthetic gas channel, and the shell is assembled by a plurality of structural members, so that the manufacturing difficulty can be reduced, the production efficiency can be improved, the replacement of a single structural member can be performed, and the maintenance cost can be reduced.

Optimization of the first preferred housing: the housing is further provided with an insulating tube 15 which is sleeved outside the air inlet tube 14. By sheathing the insulating tube 15 around the air intake tube 14, the high voltage signal of the high voltage input member 21 is prevented from breaking through the air intake tube 14.

Exemplary: as shown in fig. 1 and 2, the rear case 12 has a circular groove structure; the open end of the rear shell 12 is provided with an external thread 122, the bottom wall of the tank of the rear shell 12 is provided with a third through hole 123 through which the high-voltage input piece 21 passes, the outer wall of the rear shell 12 is provided with a semicircular clamping groove 121, the inner diameter of the clamping groove 121 is equal to the outer diameter of the insulating tube 15, and the outer diameter of the air inlet tube 14 is equal to the inner diameter of the insulating tube 15, so that the insulating tube 15 is accommodated in the clamping groove 121, and the insulating tube 15 and the air inlet tube 14 can be limited simultaneously; the front shell 11 is of a stepped circular groove structure, an internal thread is formed at the opening end of the front shell 11 and is in fit connection with an external thread 122 on the opening end of the rear shell 12, and 7 circular through holes corresponding to the tips of the discharge electrodes 22, namely second through holes 111, are formed in the bottom wall of the front shell 11; the outer wall of the front shell 11 is connected with a section of right-angle pipeline 112, one end of the right-angle pipeline 112 is communicated with the ionization chamber, and the other end is used for being connected with the air inlet pipe 14, namely a connecting port 113; the spacer 13 has a circular groove structure with an outer diameter equal to the inner diameter of the rear case 12; 7 circular through holes corresponding to the tips of the discharge electrodes 22, namely first through holes 131, are formed in the bottom wall of the isolation piece 13, a circle of protrusions are formed on the outer peripheral surface of one end of the isolation piece 13, where the first through holes 131 are formed, one surface of the protrusions, close to the front shell 11, is pressed by the front shell 11, one surface, close to the rear shell 12, is pressed against the opening end surface of the rear shell 12, meanwhile, the aperture of the first through holes 131 is set to be slightly smaller than the diameter of the discharge electrodes 22, so that the discharge electrodes 22 and the first through holes 131 are connected in an interference fit mode, and in addition, a sealing ring 17 is sleeved on the external threads 122. In order to prevent leakage, after the ionizing unit is mounted in the receiving chamber, the receiving chamber is filled with glue through the third through hole 123, and at the same time, in order to prevent leakage, an adhesive may be applied to the junction of the separator 13 and the rear case 12.

Second preferred embodiment of the housing: the housing is provided with a front shell 11, a rear shell 12, a spacer 13 and a spacer 16; the front shell 11 is connected to the first end of the rear shell 12 and is provided with a second through hole 111 for the plasma to be emitted; the partition piece 16 is arranged in the rear shell 12 and divides the shell inner space of the rear shell 12 into a gas channel and a containing cavity; the separator 13 is connected to one end of the separator 16 near the first end of the rear case 12, and is provided with a first through hole 131 through which the discharge electrode 22 passes. The separation piece 13 and the separation piece 16 enclose a synthetic accommodating cavity, the separation piece 16 and the rear shell 12 enclose a synthetic gas channel, the separation piece 13 and the front shell 11 enclose a synthetic ionization cavity, the separation piece 13 and the front shell 11 are assembled into a shell, the manufacturing difficulty can be reduced, the production efficiency is improved, the replacement of a single structural part can be carried out, the maintenance cost is reduced, in addition, the accommodating cavity and the gas channel are separated into the inner shell space of the rear shell 12 by arranging the separation piece 16, the inner shell space of the rear shell 12 is fully utilized, and the volume of the plasma jet generating assembly can be effectively reduced.

Exemplary: as shown in fig. 3 and 4, the rear shell 12 has a circular groove structure, a third through hole 123 and a fourth through hole 124 are formed in the groove bottom wall of the rear shell 12, the third through hole 123 with a pore diameter smaller than the inner diameter of the partition piece 16 is formed in the center of the groove bottom wall of the rear shell 12 so as to correspond to the accommodating cavity, a circle of protrusions is formed at one end, far away from the accommodating cavity, of the third through hole 123, and the protrusions enclose a cylindrical space aligned with the third through hole 123; a circular fourth through hole 124 with the aperture smaller than the difference between the inner radius of the rear shell 12 and the outer radius of the partition 16 is formed at the edge position of the bottom wall of the groove of the rear shell 12 so as to correspond to the gas channel, a circle of elastic bulge is arranged at one end of the fourth through hole 124 far away from the gas channel for being conveniently connected with the gas supply pipeline, the elastic bulge is enclosed into a cylindrical space aligned with the fourth through hole 124, and the opening end of the rear shell 12 is provided with an everted first clamping hook 125; the high-pressure input piece 21 is arranged through the third through hole 123; the partition piece 16 is of a straight cylinder structure with the diameter smaller than the inner diameter of the rear shell 12 and the height smaller than the height of the rear shell 12, the axial line of the partition piece 16 is collinear with the axial line of the rear shell 12, one opening end is in fit connection with the bottom surface in the groove of the rear shell 12, and the other opening end is provided with a clamping protrusion for clamping with the partition piece 13; the spacer 13 is a circular groove structure with the outer diameter equal to that of the spacer 16, 7 circular through holes, namely first through holes 131, with the aperture slightly smaller than that of the discharge electrode 22 and corresponding to the tip of the discharge electrode 22 are formed in the groove bottom wall of the circular groove structure, the discharge electrode 22 passes through the circular through holes in an interference fit mode, and the sum of the heights of the spacer 13 and the spacer 16 is smaller than that of the rear shell 12; the front shell 11 is of a stepped circular groove structure, a second buckle which is matched with the first clamping hook 125 and turned inwards is arranged at the opening end of the front shell 11, the second clamping hook 114 is connected with the first clamping hook 125 in a matched mode, and 7 circular through holes corresponding to the tip ends of the discharge electrodes 22, namely, second through holes 111, are formed in the bottom wall of the front shell 11. In order to prevent leakage, after the ionizing unit is mounted in the receiving chamber, the receiving chamber is filled with glue through the third through hole 123, and at the same time, in order to prevent leakage, an adhesive may be applied to the junction of the separator 13 and the rear case 12.

Optimization of the housing for the two preferred cases described above: a vent column aligned with the second through hole is provided at the bottom surface in the groove of the front case 11 to focus the plasma jet to obtain a better jet effect.

Embodiment two:

an embodiment of the present utility model provides a skin therapeutic apparatus including:

any one of the plasma jet generating assemblies provided.

While the plasma jet generating assembly and the skin treatment apparatus provided by the present utility model have been described in detail, those skilled in the art will appreciate that the present utility model is not limited to the specific embodiments and application ranges given by way of example.

Claims (16)

1. A plasma jet generating assembly, comprising:

a housing and an ionization unit;

the shell is provided with a gas channel, a containing cavity and an ionization cavity, wherein the containing cavity is mutually isolated from the ionization cavity, the gas channel is mutually isolated from the containing cavity, and the gas channel is communicated with the ionization cavity;

the ionization unit is provided with a high-voltage input piece and N discharge electrodes, wherein N is an integer greater than 1;

the first end of the discharge electrode is accommodated in the accommodating cavity and is connected with the high-voltage input piece;

the second end of the discharge electrode is accommodated in the ionization cavity.

2. A plasma jet generating assembly as recited in claim 1, wherein:

the first ends of the N discharge electrodes are connected in parallel;

n discharge electrodes are arranged in parallel at intervals;

the second ends of the N discharge electrodes are flush.

3. A plasma jet generating assembly as recited in claim 1, wherein:

the discharge electrode has a needle-like structure.

4. A plasma jet generating assembly according to claim 3, wherein:

the discharge electrode is composed of tungsten, molybdenum, copper, aluminum, titanium alloy or stainless steel.

5. A plasma jet generating assembly as recited in claim 1, wherein:

the ionization unit is also provided with N current limiting pieces connected between the high-voltage input piece and the discharge electrode;

the N current limiting pieces are respectively in one-to-one correspondence with the N discharge electrodes.

6. A plasma jet generating assembly as recited in claim 5, wherein:

the current limiter is a resistor or a combination of a resistor and a capacitor.

7. A plasma jet generating assembly as recited in claim 5, wherein:

the ionization unit is also provided with a limiting piece which can conduct electricity;

one end of the limiting piece is inserted into the current limiting piece, and the other end of the limiting piece is inserted into the first end of the discharge electrode.

8. A plasma jet generating assembly as recited in claim 7, wherein:

the limiting piece is of a cylindrical structure;

the utility model discloses a discharge electrode, including the cylinder structure, the jack of the first end looks adaptation of discharge electrode is offered to one terminal surface of cylinder structure with the jack of current-limiting piece looks adaptation is offered to the other terminal surface.

9. A plasma jet generating assembly as recited in claim 5, wherein:

the ionization unit is also provided with a PCB adapter plate;

one end of the PCB adapter plate is connected with the high-voltage input piece, and the other end of the PCB adapter plate is connected with the current limiting piece.

10. A plasma jet generating assembly according to any one of claims 1 to 9, wherein:

the shell is provided with a front shell, a rear shell, a spacer and an air inlet pipe;

the front shell is externally connected with the first end of the rear shell and is provided with a port for connecting with an air inlet pipe;

the separator is inscribed at the first end of the rear shell and is provided with a first through hole for the discharge electrode to pass through;

the front shell is provided with a second through hole for the plasma to jet out;

the air inlet pipe is arranged outside the rear shell.

11. A plasma jet generating assembly as recited in claim 10, wherein:

the shell is also provided with an insulating tube sleeved outside the air inlet tube.

12. A plasma jet generating assembly as recited in claim 11, wherein:

the rear shell is provided with a clamping groove;

the insulation Guan Rong is disposed in the card slot.

13. A plasma jet generating assembly as recited in claim 10, wherein:

the rear shell is of a round groove structure;

an external thread is arranged at the opening end of the rear shell, and a third through hole for the high-voltage input piece to pass through is arranged on the bottom wall of the rear shell;

the front shell is of a stepped circular groove structure and is provided with an internal thread, and the internal thread is matched with the external thread;

the isolating piece is of a circular groove structure with the outer diameter equal to the inner diameter of the rear shell;

the first through hole is formed in the bottom wall of the groove of the isolation piece.

14. A plasma jet generating assembly according to any one of claims 1 to 9, wherein:

the shell is provided with a front shell, a rear shell, a spacer and a partition;

the front shell is connected to the first end of the rear shell and is provided with a second through hole for plasma to jet out;

the partition piece is arranged in the rear shell and divides the shell inner space of the rear shell into the gas channel and the accommodating cavity;

the separator is connected to one end of the separator, which is close to the first end of the rear shell, and is provided with a first through hole for the discharge electrode to pass through.

15. A plasma jet generating assembly as recited in claim 14, wherein:

the rear shell is of a round groove structure, a third through hole and a fourth through hole are formed in the groove bottom wall of the rear shell, the third through hole corresponds to the accommodating cavity, and the fourth through hole corresponds to the gas channel;

the high-voltage input piece is arranged through the third through hole;

the partition piece is of a straight cylinder structure with the diameter smaller than the inner diameter of the rear shell;

the isolating piece is of a round groove structure;

the first through hole is formed in the bottom wall of the groove of the isolation piece.

16. A skin treatment apparatus, comprising:

a plasma jet generating assembly according to any one of claims 1 to 15.

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