Mist mixing microwave cold plasma generating device

Abstract

The utility model provides a mist mixing microwave cold plasma generating device, which relates to the technical field of microwaves and comprises a cylindrical container, an ultrasonic atomizer, a venturi, an air inlet device and a microwave plasma generating device. A mist outlet is formed in the top of the cylindrical container; the ultrasonic atomizer is arranged at the inner bottom of the cylindrical container, and a solution used for ultrasonic atomization is contained in the position between the mist outlet and the ultrasonic atomizer. The mist outlet is connected with the venturi; the air inlet device is connected with the venturi; and the venturi is connected with the microwave plasma generating device. According to the utility model, a stable plasma state can be maintained for a long time. The generated plasma is stable, low in power, high in efficiency, low in microwave excitation power, low in temperature of generated plasma flame, capable of making direct contact with human skin, high in safety and very beneficial to medical beauty operation and application. And the connecting air pipe and the cable can be freely stretched, so that the device can be well applied to medical cosmetology.

Description

Technical Field

[0001] The utility model relates to the technical field of microwaves, in particular to a mist-mixed microwave cold plasma generating device. Background Art

[0002] The content of hydroxyl radicals in microwave argon cold plasma is low. Although the content of hydroxyl radicals in the plasma after mixing argon with water vapor increases significantly, the microwave excitation power and the temperature of the plasma jet also increase equally, which is not suitable for applications such as medical beauty that require a low temperature of the plasma flame. Content of the Utility Model

[0003] In view of the above problems, the utility model provides a mist-mixed microwave cold plasma generating device.

[0004] An embodiment of the utility model provides a mist-mixed microwave cold plasma generating device, which includes: a cylindrical container, an ultrasonic atomizer, a Venturi, an air inlet device, and a microwave plasma generating device;

[0005] A mist outlet is provided at the top of the cylindrical container;

[0006] The ultrasonic atomizer is arranged at the inner bottom of the cylindrical container, and the solution for ultrasonic atomization is placed at a position between the mist outlet and the ultrasonic atomizer;

[0007] The mist outlet is connected to the Venturi;

[0008] The air inlet device is connected to the Venturi;

[0009] The Venturi is connected to the microwave plasma generating device.

[0010] Optionally, the ultrasonic atomizer is configured to perform ultrasonic atomization on the solution to generate upward-diffusing water mist.

[0011] Optionally, the mist outlet is configured to allow the water mist to flow from the inside of the cylindrical container to the Venturi.

[0012] Optionally, the air inlet device is configured to introduce gas from the outside into the Venturi.

[0013] Optionally, the Venturi is configured to uniformly mix the water mist and the gas, and spray the mixed water mist and gas towards the microwave plasma generating device.

[0014] Optionally, the microwave plasma generating device is configured to use the water mist as a working gas for the microwave plasma generator to generate a plasma flame.

[0015] Optionally, the Venturi includes: a nozzle, a suction chamber, a diffuser chamber, and a check valve;

[0016] One end of the suction chamber is connected to the mist outlet through a suction port, and the other end is connected to the diffuser chamber;

[0017] One end of the diffuser chamber is connected to the air inlet device through a first air inlet. The other end of the diffuser chamber uses the check valve to make the water mist gas after the water mist and the gas are mixed pass through the nozzle and the air outlet and be sprayed towards the microwave plasma generating device.

[0018] Optionally, the microwave plasma generating device includes: a second air inlet;

[0019] The microwave plasma generating device is connected to the air outlet through the second air inlet.

[0020] Optionally, the microwave plasma generating device includes: a microwave connection end;

[0021] The connection end is configured to connect a cable to provide microwave to the microwave plasma generating device.

[0022] Optionally, the air inlet device is configured to have a gas inlet speed of 3 - 16 L / min;

[0023] The microwave plasma generating device is configured to adjust its own power range: 3 - 20 W.

[0024] The mist mixing microwave cold plasma generating device provided by the present utility model includes: a cylindrical container, an ultrasonic nebulizer, a Venturi, an air inlet device, and a microwave plasma generating device. A mist outlet is provided at the top of the cylindrical container; the ultrasonic nebulizer is arranged at the inner bottom of the cylindrical container, and the solution for ultrasonic atomization is placed at the position between the mist outlet and the ultrasonic nebulizer.

[0025] The mist outlet is connected to the Venturi; the air inlet device is connected to the Venturi; the Venturi is connected to the microwave plasma generating device.

[0026] In view of the problems that the current microwave excitation power and the temperature of the plasma jet are relatively high and are not suitable for applications such as medical beauty that require a low temperature of the plasma flame, etc., the present utility model creatively proposes a brand-new mist-mixed microwave cold plasma generating device. By using a Venturi, the water mist after ultrasonic atomization is first fully mixed with the gas, and then introduced into the microwave plasma generator, so that the ultrasonic atomized water mist / gas mixed microwave plasma can have relatively high stability and can maintain a stable plasma state for a long time. The generated plasma is stable, has low power, high efficiency, and the plasma flame generated by the low microwave excitation power has a low temperature and can directly contact the human skin, with high safety, which is very conducive to medical beauty operation applications. And the connecting air pipe and cable can be stretched at will, which can be very well applied to medical beauty. It has relatively high practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0028] Figure 1 is a schematic diagram of the mist-mixed microwave cold plasma generating device according to an embodiment of the present utility model;

[0029] Figure 2 is a structural diagram of a relatively optimal mist-mixed microwave cold plasma generating device in an embodiment of the present utility model;

[0030] Figure 3 is a structural diagram of a relatively optimal Venturi in an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the above-mentioned objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model, and are only a part of the embodiments of the present utility model, rather than all of the embodiments, and are not used to limit the present utility model.

[0032] Plasma is an electrically neutral substance composed of atoms, electrons, and ions, and is also known as the "fourth state" of matter. Due to the presence of a relatively large number of electrons, ions, excited-state atoms and molecules, and active free radicals, it has special physical, chemical, and biological properties and is widely studied and applied.

[0033] Microwave cold plasma technology is a new method for preparing plasma. By microwave radiation, gas molecules are excited to high energy levels, thus forming plasma. Compared with DC excitation and RF excitation, the microwave excitation method does not require external electrodes, avoiding the problem of electrode contamination. At the same time, the plasma generated by the microwave excitation method has excellent characteristics such as high ionization degree, high electron density, and high electron temperature.

[0034] The inventors found that in recent years, the atmospheric pressure low-temperature plasma technology has developed rapidly and achieved remarkable results in the biomedical field, such as wound healing, disinfection, and even cancer treatment. Plasma medical beauty is a method of using plasma technology for skin treatment and beauty. Plasma can be generated by discharge to form charged gas or plasma cloud.

[0035] Cold plasma refers to plasma with relatively low temperature because its energy is mainly used to activate surrounding molecules rather than heating. This characteristic enables cold plasma to be applied in the field of medical beauty because it can promote skin regeneration and treatment without harming the skin. Plasma medical beauty is usually a low-invasive or non-invasive treatment method, which causes less damage to the skin and has a shorter recovery time compared to traditional laser and surgical treatments.

[0036] During the atmospheric pressure gas discharge process, a large number of active particles such as electrons, ions, and free radicals are generated. These particles can penetrate into biological tissues and then produce corresponding biological effects. The effect of plasma is related to the number density of active particles, and the number density of active particles is affected by the composition of the working gas. Adding a certain proportion of water to the working gas is an effective way to generate oxygen-containing active particles in microwave plasma. Hydroxyl radical is an important oxygen-containing active particle with extremely strong oxidation ability.

[0037] Currently, the technical means to achieve microwave plasma are generally divided into two:

[0038] One is to obtain microwave plasma from a water vapor / argon mixed gas. Generally, the method is: mix argon with a certain proportion of water vapor and then input them together as the working gas into the microwave plasma generating device to produce plasma with highly active particles.

[0039] The other is the dielectric barrier discharge plasma of an ultrasonic atomized water / argon mixed gas. Generally, the method is: use the combination of the water mist generated by ultrasonic atomization and the gas generated by the gas generating device, combine it with the micro plasma generating device to improve the discharge effect, and obtain better discharge uniformity and high efficiency of generating active substances.

[0040] However, the inventors further studied and found that the above two methods have the following problems:

[0041] For the method of microwave plasma of water vapor mixed gas: First, the temperature of water vapor is relatively higher than that of normal temperature gas. After mixing the gases, the excitation power of microwave is relatively high, and the temperature of the generated plasma jet is relatively high. When the human skin temperature is higher than 45 °C, it will cause skin damage and pain. Second, in order to ensure the amount of water vapor mixing, complex designs need to be carried out on the body structure of the plasma torch to prevent the condensation of water vapor. Therefore, it is not suitable for applications such as medical beauty that require a low temperature of the plasma flame.

[0042] For the method of dielectric barrier discharge plasma of ultrasonic atomized water / argon mixed gas: First, dielectric barrier discharge is a high-voltage discharge, which has safety risks when applied to the human body in medical treatment. Second, gas is introduced into the columnar container by the intake device, so that the water mist carries the gas and then diffuses to the mist outlet for discharge. As the generator is used, the volume of liquid water in the columnar container decreases, and the water / gas ratio discharged from the mist outlet gradually changes and cannot be controlled and maintained, resulting in unstable plasma. Therefore, it is also not suitable for applications such as medical beauty that require a low temperature of the plasma flame.

[0043] In view of the above problems, the inventor creatively proposed a fog mixed microwave cold plasma generating device of the present utility model. The technical solution of the present utility model will be explained and described in detail below.

[0044] The fog mixed microwave cold plasma generating device of the present utility model, referring to Figure 1 the schematic diagram of the device shown, includes: a columnar container, an ultrasonic atomizer, a Venturi, an intake device, and a microwave plasma generating device.

[0045] Among them, a mist outlet is provided at the top of the columnar container; the ultrasonic atomizer is arranged at the inner bottom of the columnar container, and the solution for ultrasonic atomization is placed at the position between the mist outlet and the ultrasonic atomizer. The mist outlet is connected to the Venturi; the intake device is connected to the Venturi. The Venturi is connected to the microwave plasma generating device.

[0046] In a possible embodiment, the Venturi includes: a nozzle, a suction chamber, a diffuser chamber, and a check valve. Referring to Figure 3 the structural diagram of the preferred Venturi shown, the suction chamber is connected to the mist outlet through a suction port, and the other end is connected to the diffuser chamber; one end of the diffuser chamber is connected to the intake device through a first intake port ( Figure 3 represented by the intake port in the figure), and the other end of the diffuser chamber uses a check valve, so that the water mist after mixing the water mist and gas is sprayed through the nozzle and the air outlet towards the microwave plasma generating device.

[0047] In a possible embodiment, the ultrasonic nebulizer is configured to ultrasonically nebulize a solution to generate an upwardly diffused water mist. The mist outlet is configured to allow the water mist to flow from the inside of the cylindrical container to the Venturi. Since one end of the suction port of the Venturi is connected to the mist outlet and the other end is connected to the diffuser chamber, the water mist flowing out from the mist outlet above the cylindrical container flows through the suction port of the Venturi to the diffuser chamber of the Venturi.

[0048] In a possible embodiment, the air intake device is configured to introduce gas into the Venturi from the outside. Since one end of the first air intake port of the Venturi is connected to the air intake device and the other end is connected to the diffuser chamber, after the air intake device intakes air, it flows through the first air intake port to the diffuser chamber of the Venturi.

[0049] In a possible embodiment, the Venturi is configured to uniformly mix the water mist and the gas, and spray the mixed water mist-gas towards the microwave plasma generating device. Since both the water mist and the gas enter the diffuser chamber of the Venturi, in the diffuser chamber, the water mist and the gas can be uniformly mixed, and then the mixed water mist-gas is sprayed towards the microwave plasma generating device.

[0050] In a possible embodiment, the microwave plasma generating device is configured to use the water mist-gas as the working gas for the microwave plasma generator to excite and generate a plasma flame. And the microwave plasma generating device includes: a second air intake port; the microwave plasma generating device is connected to the outlet of the Venturi through the second air intake port. Therefore, the uniformly mixed water mist-gas is sprayed into the interior of the microwave plasma generating device through the outlet and the second air intake port, so that the ultrasonically nebulized water mist / gas mixed microwave plasma can have higher stability and can maintain a stable plasma state for a longer time. In the above structure, the suction port and the mist outlet, and the outlet and the second air intake port can be connected by a trachea, and the trachea can be stretched arbitrarily.

[0051] In a possible embodiment, the microwave plasma generating device further includes: a microwave connection end; the microwave connection end is configured to connect a cable to provide microwave to the microwave plasma generating device. For example: provide microwave of 2.45 GHz.

[0052] In a possible embodiment, the air intake device is configured to have a gas inlet speed of 3 - 16 L / min. The microwave plasma generating device is configured to adjust its own power range to: 3 - 20 W.

[0053] For a better understanding of the above-mentioned mist mixed microwave cold plasma generating device, refer to the structural diagram of a preferred mist mixed microwave cold plasma generating device shown in the figure. Figure 2Figure 0 schematically shows the structures of a cylindrical container, an ultrasonic nebulizer, a solution, a mist outlet, a Venturi, an air inlet device, and a microwave plasma generating device, as well as their connection relationships. Among them, in the Venturi structure, the air inlet 1 represents the first air inlet, and the suction port, the air outlet, and the diffuser chamber are schematically shown. In the microwave plasma generating device structure, the air inlet 2 represents the second air inlet, and the microwave cable is schematically shown.

[0054] As Figure 2 described above, a mist outlet is provided at the top of the cylindrical container, an ultrasonic nebulizer is provided at the bottom of the cylindrical container, and a solution for ultrasonic atomization is contained at the position between the mist outlet and the ultrasonic nebulizer of the cylindrical container. The ultrasonic nebulizer atomizes the solution to generate a water mist that diffuses upward and flows out from the upper mist outlet. The mist outlet is connected to the suction port of the Venturi.

[0055] The air inlet device includes an air inlet pipe, and the air inlet pipe is connected to the air inlet 1 of the Venturi for air intake. The air inlet 2 of the microwave plasma generating device is connected to the air outlet of the Venturi. The microwave plasma generating device can be made of brass material and is connected by a microwave cable to input 2.45 GHz microwave.

[0056] The air inlet 1 of the Venturi is connected to the air inlet pipe, and the suction port is connected to the mist outlet of the cylindrical container. Due to the unique mixing chamber design of the Venturi (including the design of the diffuser chamber and the check valve), a strong atomized water flow is formed and mixed with the gas (i.e., the water mist gas) and sprayed from the air outlet of the Venturi to the air inlet 2 of the microwave plasma generating device.

[0057] In a possible embodiment, the solution for the ultrasonic nebulizer can be pure water, ionized water, distilled water, etc., or it can also be used after mixing an appropriate amount of drugs such as hydrogen peroxide, ethanol, antibiotics, vitamin C, and Kangfuxin solution.

[0058] In a possible embodiment, the gas introduced into the air inlet pipe includes one or more of air, oxygen, nitrogen, and argon.

[0059] From the above structure, it can be seen that the ultrasonic atomized water mist / gas mixed microwave plasma can have relatively high stability, can maintain a stable plasma state for a long time, has a low microwave excitation power, and the generated plasma flame temperature is low and can directly contact the human skin, with high safety. Moreover, the plasma generator is small and portable, and the connecting air pipe and the microwave cable can be stretched at will, which is very conducive to medical beauty operation applications.

[0060] Based on the above mist mixed microwave cold plasma generating device, the method during its specific application includes the following steps:

[0061] Step V1: Fill the cylindrical container with a solution, and the content of this solution is lower than the maximum liquid medicine volume of the cylindrical container.

[0062] Step V2: Connect the air inlet 2 of the microwave plasma generating device to the air outlet of the Venturi, connect the suction inlet of the Venturi to the mist outlet at the top of the cylindrical container, and connect the microwave plasma generator to the microwave power supply.

[0063] Step V3: Turn on the ultrasonic nebulizer and generate upward-diffusing micron-scale water mist through the ultrasonic nebulizer and the solution. The water mist flows into the suction inlet of the Venturi from the mist outlet at the top of the cylindrical container. Pass gas into the Venturi through the gas inlet device, so that the water mist and the gas are uniformly mixed and then discharged from the air outlet of the Venturi.

[0064] Step V4: Turn on the power supply and adjust the microwave power of the microwave plasma generating device until a stable and uniform microwave cold plasma jet is formed.

[0065] Step V5: The mixed gas after the water mist and the gas are mixed flows in through the air inlet 2 of the microwave plasma generator, mixes with the microwave plasma jet and undergoes a chemical reaction to generate chemical oxidation species represented by hydroxyl radicals with chemical oxidation ability. The active species are carried by fine water droplets to form ultrasonic atomized plasma active droplets and act on the environmental surface or human skin. When in contact with the environmental surface or human skin, a chemical oxidation free radical reaction will occur and active particles will be generated. These active particles can penetrate the environmental surface or human skin tissue to varying degrees, so as to achieve the purposes of sterilization and disinfection, medical beauty, etc.

[0066] Preferably, in Step V3, the gas inlet speed of the gas inlet device is selected to be 3 - 16 L / min. In Step V4, the preferred power of the microwave plasma generating device is adjusted to 3 - 20 W, and the microwave frequency is 2.45 GHz.

[0067] In summary, the mist-mixed microwave cold plasma generating device of the present utility model includes: a cylindrical container, an ultrasonic nebulizer, a Venturi, a gas inlet device, and a microwave plasma generating device. A mist outlet is provided at the top of the cylindrical container; the ultrasonic nebulizer is arranged at the inner bottom of the cylindrical container, and the solution for ultrasonic atomization is placed at a position between the mist outlet and the ultrasonic nebulizer.

[0068] The mist outlet is connected to the Venturi; the gas inlet device is connected to the Venturi; the Venturi is connected to the microwave plasma generating device.

[0069] In view of the problems that the current microwave excitation power and the temperature of the plasma jet are relatively high and not suitable for applications such as medical beauty that require a low temperature of the plasma flame, etc., the present utility model creatively proposes a brand-new mist-mixed microwave cold plasma generating device. By using a Venturi, the water mist atomized by ultrasonic is first fully mixed with the gas, and then introduced into the microwave plasma generator, so that the ultrasonic atomized water mist / gas mixed microwave plasma can have high stability and can maintain a stable plasma state for a long time. The unique mixing chamber design of the Venturi enables the gas and liquid to be uniformly and stably mixed, without energy consumption, the device is simple, small and low-cost, and is easy to be actually applied. The generated plasma is stable, low-power, high-efficiency, and the plasma flame temperature generated by the low microwave excitation power is low and can directly contact the human skin, with high safety, which is very beneficial to medical beauty operation applications. And the connecting air pipe and cable can be stretched at will, which can be very well applied to medical beauty. It has high practicability.

[0070] Although the preferred embodiments of the embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present utility model.

[0071] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or terminal device including the said element.

[0072] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms without departing from the purpose of the present utility model and the scope protected by the claims. All of these belong to the protection scope of the present utility model.

Claims

1. A mist-mixed microwave cold plasma generating device, characterized in that, The fog mixing microwave cold plasma generating device includes: a cylindrical container, an ultrasonic nebulizer, a Venturi, an air inlet device, and a microwave plasma generating device; The top of the cylindrical container is provided with a fog outlet; The ultrasonic nebulizer is arranged at the inner bottom of the cylindrical container, and the solution for ultrasonic atomization is placed at a position between the fog outlet and the ultrasonic nebulizer; The fog outlet is connected to the Venturi; The air inlet device is connected to the Venturi; The Venturi is connected to the microwave plasma generating device.

2. The mist mixing microwave cold plasma generating device according to claim 1, wherein The ultrasonic nebulizer is configured to ultrasonically atomize the solution to generate upward-diffusing water mist.

3. The mist mixing microwave cold plasma generating device according to claim 2, characterized in that, The fog outlet is configured to allow the water mist to flow from the inside of the cylindrical container to the Venturi.

4. The mist mixing microwave cold plasma generating device according to claim 2, characterized in that, The air inlet device is configured to introduce gas into the Venturi from the outside.

5. The mist mixing microwave cold plasma generating device according to claim 4, characterized in that, The Venturi is configured to uniformly mix the water mist and the gas, and spray the mixed water mist and gas towards the microwave plasma generating device.

6. The mist mixing microwave cold plasma generating device according to claim 5, characterized in that, The microwave plasma generating device is configured to use the water mist as a working gas to generate a plasma flame by excitation.

7. The mist mixing microwave cold plasma generating device according to claim 1, wherein The Venturi includes: a nozzle, a suction chamber, a diffuser chamber, a check valve; One end of the suction chamber is connected to the fog outlet through a suction port, and the other end is connected to the diffuser chamber; One end of the diffuser chamber is connected to the air inlet device through a first air inlet, and the other end of the diffuser chamber uses the check valve to make the water mist and gas mixture pass through the nozzle and the air outlet and spray towards the microwave plasma generating device.

8. The mist mixing microwave cold plasma generating device according to claim 7, wherein The microwave plasma generating device includes: a second air inlet; The microwave plasma generating device is connected to the air outlet through the second air inlet.

9. The mist mixing microwave cold plasma generating device according to claim 1, characterized in that, The microwave plasma generating device includes: a microwave connection end; The connection end is configured to connect a cable to supply microwave to the microwave plasma generating device.

10. The mist mixing microwave cold plasma generating device according to claim 1, characterized in that, The air inlet device is configured to introduce gas at a speed of 3 - 16 L / min; The microwave plasma generating device is configured to adjust its own power range: 3 - 20 W.

Images