CN112843278B - Handheld medical cold dense air plasma jet spray gun - Google Patents

Abstract

The invention discloses a handheld medical cold dense air plasma jet spray gun in the field of plasma sterilization and disinfection, which comprises a device shell, a discharge electrode, a Tesla coil, a touch screen, a heat dissipation fan, an internal circuit, a control switch and a power lithium battery, wherein the discharge electrode, the Tesla coil, the touch screen, the heat dissipation fan, the internal circuit, the control switch and the power lithium battery are respectively connected with the touch screen, the control switch and the Tesla coil through the internal circuit. The touch screen can regulate and control the pulse width of the square wave pulse signal, control the on time of the IGBT, on one hand, control the tip pulse discharge, reduce the discharge jet flow temperature; and on the other hand, the heat dissipation fans are driven to be linked, when the pulse width is widened, the IGBT conduction time is increased, the rotation speed of the heat dissipation fans is increased, the wind speed is increased, and the purpose of reducing the discharge jet flow temperature is achieved. The stable, continuous and high-density cold plasma is generated on the discharge electrode. Possess sterilization high efficiency nature, universality, flexibility, can satisfy medical field's sterilization demand, still have less equipment volume simultaneously, portable, easy operation.

Description

Handheld medical cold dense air plasma jet spray gun

Technical Field

The invention belongs to the field of plasma disinfection and sterilization, and particularly relates to a handheld medical cold air plasma jet spray gun.

Background

Sterilization is the most effective means for preventing infection, and the conventional method generally adopts a liquid solvent sterilization mode and a high-temperature steam sterilization mode for sterilization. However, the disinfection of the liquid solvent can cause the surface of the object to be eliminated to be eroded to different degrees, thereby affecting the working performance of the object and causing certain pollution to the environment. The disinfectant is required to be prepared into different concentrations according to different article characteristics, so that the disinfectant is complex to use, the incomplete sterilization effect is poor, and the health of a worker can be seriously threatened after the worker contacts the disinfectant for a long time. Heat sensitive medical devices, particularly high precision medical devices which enter the interior of the human body, have extremely high requirements for sterilization, and can not be subjected to high temperature and high pressure or toxic (such as a fiber endoscope). The existing physical and chemical sterilization methods can not meet the requirements of heat sensitivity, no residue and omnibearing efficient quick sterilization of such medical articles. Experimental research shows that the air-cooled plasma has 3 advantages in the field of medical disinfection and sterilization: (1) The method has high efficiency, and generally only needs 1-2 minutes to reach the ideal sterile level; (2) The cold plasma gas temperature is close to room temperature, and the human body can be directly contacted, so that the cold plasma gas temperature can be used for sterilizing heat sensitive materials, and the use amount of disposable medical articles is greatly reduced: (3) Optionally, the plasma contains a plurality of active groups and can be used for stopping bleeding and clotting of wounds and promoting wound healing without damaging normal body cells.

At present, the sterilization of medical supplies mostly adopts a high-efficiency plasma sterilization device with comprehensive efficacy to prevent infection.

Chinese patent (application number: CN202010118809.X, grant publication number: CN111202857A, grant publication date: 2020.05.29) discloses a plasma medical instrument disinfection and sterilization device, which adopts arc discharge to generate plasma, and the generated plasma can reach higher density, so that the device has better disinfection and sterilization effect compared with the traditional disinfection and sterilization mode. However, medical instruments with high discharge temperature and heat sensitivity cannot be used, are not absolutely safe to human bodies, and cannot be directly contacted. Only some heat resistant articles can be sterilized. So the device has single function and can not meet the disinfection requirement of the existing articles.

Chinese patent (CN 201610751745.0, CN106421837A and 2017.02.22) discloses a microplasma sterilizing and disinfecting device which adopts a low-temperature plasma DBD dielectric barrier discharge technology to generate annular low-temperature plasma jet under the atmospheric pressure, and has the characteristics of good uniformity and short sterilizing time. And the damage of the current disinfectant to the environment can be effectively reduced, so that the environment is more environment-friendly. However, the reactor has the disadvantages of complex structure, poor heat dissipation performance and low safety, and the service life is short.

The Chinese patent (CN 201110206004.1, CN102343106A, 2012.02.08) discloses an atmospheric pressure low-temperature plasma sterilization device and a sterilization method, which can generate large-area cold plasma under atmospheric pressure to sterilize the interior of a packaging material, and is efficient and energy-saving. However, inert gases such as helium need to be introduced in the using process, so that the manufacturing cost is increased, the using conditions limit the using flexibility, the method cannot be widely applied, and the method has problems in the omnibearing disinfection and sterilization of articles (such as surgical knives) which are not easy to package or irregular in shape and corner gaps.

Therefore, how to create a device with universality, high efficiency, quick action time, simplicity and portability of a treatment device and good sterilization effect is a problem which needs to be solved at present.

The atmospheric pressure air cold-sealed plasma disinfection and sterilization technology almost meets all the conditions required by ideal sterilization, and biomedical application is an important direction of the scientific research, exploration and practical application of the atmospheric pressure low-temperature plasma. Based on the above, the invention designs the handheld medical cold dense air plasma jet spray gun, which has the characteristics of high sterilization efficiency, universality, flexibility and the like, can meet the sterilization requirements of various articles in the medical field, and has the advantages of high jet electron density, short action time, simple radio frequency discharge structure, low cost, safety, environmental protection, smaller equipment volume, convenience in carrying, simplicity in operation and convenience in use.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provide a handheld medical cold air plasma jet spray gun.

In order to achieve the technical purpose and the technical effect, the invention is realized by the following technical scheme:

The utility model provides a handheld medical cold dense air plasma jet spray gun, including the device shell and install in the inside discharge electrode of device shell, tesla coil, touch screen, the heat dissipation fan, internal circuit, control switch and power lithium cell, discharge electrode is located the device and is left end, tesla coil links to each other with the discharge electrode, the touch screen is located tesla coil right side, the heat dissipation fan is located the inner chamber right-most end of device shell, power lithium cell passes through internal circuit and links to each other with touch screen, control switch, tesla coil respectively, output kilovolt's high frequency high pressure at last acts on discharge electrode, impel discharge electrode ionization surrounding air to discharge, produce cold plasma. The internal circuit comprises a charging module, a pulse driving module, an IGBT and a self-excitation driving circuit.

Preferably, the device shell comprises a gun head and a gun body, wherein the gun head is in a round table shape and made of ceramic fiber materials, and the gun body is made of insulating plastics and is easy to hold.

Preferably, the gun head is in threaded connection with the gun body.

Preferably, the voltage of the power lithium battery is 25V.

Preferably, the side wall on the rightmost side of the shell is provided with ventilation openings which are beneficial to heat dissipation of the device, and the number of the ventilation openings is 30 round holes with the diameter of 5 mm.

Preferably, the bottom end of the handle is provided with a battery shell, the battery shell is fixedly connected with the shell, and a power lithium battery is fixedly arranged in the battery shell.

Preferably, the charging module lower side interface department is connected with USB interface electric connection that charges, and the charging module upper side interface department is connected with power lithium cell, and power lithium cell is connected with the pilot lamp that charges.

Preferably, the direct current generated by the power lithium battery is supplied to a heat dissipation fan, a pulse signal generator, an IGBT and a self-excitation driving circuit.

Preferably, the tesla coil is a single-tube self-excited tesla coil. The self-excitation driving circuit comprises a self-excitation driving circuit, a primary resonant circuit and a secondary circuit, wherein the number of turns of a primary coil is 5T, and the number of turns of a secondary coil is 70T.

Preferably, the tesla discharge is also called radio frequency discharge, and the air around the electrode is ionized by using high frequency and high voltage to generate low-temperature plasma, wherein the electron density of the plasma jet is large, and experimental research shows that the electron density is in the order of 1020m < -3 > to 1021m < -3 >.

Preferably, the discharge electrode is a metal discharge needle electrode, the metal discharge needle electrode is conical, and the diameter of the conical bottom surface is 0.3cm. The metal discharge needle electrode is inserted into the top end of the secondary coil, and the secondary coil is connected with the primary resonant circuit charging capacitor.

Preferably, the pulse driving module includes a pulse signal generator.

Preferably, the pulse signal generator generates a square wave signal.

Preferably, the touch screen can regulate and control the pulse width of the square wave pulse signal triggering the IGBT.

Preferably, the rated operating voltage of the heat dissipation fan is 25V.

The beneficial effects are that:

compared with the prior art, the invention has the remarkable beneficial effects that:

1. The invention generates square wave pulse signals through the pulse signal generator to drive the IGBT. The touch screen can regulate and control the pulse width of the square wave pulse signal, control the on time of the IGBT, on one hand, can control the tip pulse discharge, reduce the discharge jet flow temperature; and on the other hand, the heat dissipation fans are driven to be linked, when the pulse width is widened, the IGBT conduction time is increased, the rotation speed of the heat dissipation fans is increased, the wind speed is increased, and the purpose of reducing the discharge jet flow temperature is achieved. The stable, continuous and high-density cold plasma is generated at the tip of the discharge electrode.

2. The heat dissipation fan is driven, so that the heat dissipation of the device is facilitated, heating damage caused by overhigh temperature of each component can be prevented, and on the other hand, the heat dissipation fan drives air to flow, so that the temperature of the tip discharge jet flow is reduced. In addition, compared with the existing plasma sterilization device, the plasma sterilization device has the advantages of smaller volume, lower cost, easiness in holding and carrying, enhanced practicability and solves the problems of single function, low sterilization efficiency, limited application range, poor local treatment effect and the like of the existing device.

3. Tesla discharge is also called radio frequency discharge, and high-frequency and high-voltage are utilized to ionize air around the electrode to generate low-temperature plasma, wherein the electron density of plasma jet is large, and experimental research shows that the electron density is in the order of 1020 m-3-1021 m-3. Meets the requirements of the disinfection technology on high efficiency and rapidity.

4. The temperature of the generated plasma is lower than 40 ℃, which is absolutely safe to human body and can be directly touched.

5. Simple structure, reasonable device layout, convenient and efficient use, good heat dissipation performance and long service life.

6. The device has stable operation, simple operation and wide application prospect.

Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the device of the present invention;

FIG. 2 is a schematic diagram of the internal circuit structure of the device of the present invention;

FIG. 3 is a schematic structural view of an embodiment of the device of the present invention;

In the drawings, the list of components represented by the various numbers is as follows:

1. A device housing; 101. a gun head; 102. a gun body; 2. a discharge electrode; 201. a tip cone needle electrode; 3. a tesla coil; 301. a primary coil; 302. a secondary coil; 4. a touch screen; 5. an internal circuit; 6. a heat dissipation fan; 7. a vent; 8. a control switch; 9. a battery case; 10. a power lithium battery; a usb interface; 12. an indicator light; 13. a charging module; 14. a power lithium battery; 15. a pulse driving module; 16. and a self-excited driving circuit.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1-3, the invention discloses a handheld medical cold dense air plasma jet spray gun, which comprises a device shell 1, a discharge electrode 2, a tesla coil 3, a touch screen 4, an internal circuit 5, a heat dissipation fan 6, a control switch 8 and a power lithium battery 10, wherein the discharge electrode 2 is arranged at one end part of an inner cavity of the device shell 1, the tesla coil 3 is connected with the discharge electrode 2, the touch screen 4 is arranged at the right side of the tesla coil 3, the heat dissipation fan 6 is arranged at one end of the inner cavity of the device shell 1 far away from the discharge electrode 2, the tesla coil 3 is connected with the discharge electrode 2, the power lithium battery 10 is used for supplying power to the heat dissipation fan 6, the internal circuit 5 is electrically connected with the touch screen 4, the control switch 8 and the tesla coil 3, and finally, high-frequency high-voltage of kilovolt level is output to the discharge electrode 2 to promote the tip discharge of the discharge electrode 2, and cold plasma is generated, and the internal circuit 5 comprises a charging module 13, a pulse driving module 15 and a self-excited driving circuit 16.

The device comprises a device shell 1 and a device body 102, wherein the device shell 1 is composed of a gun head 101 and a gun body 102, the gun head 101 is in a circular truncated cone shape and is made of ceramic fiber materials, the gun body 102 is in a cylindrical structure which is easy to hold, the gun head 101 and the gun body 102 are connected through threads, a Tesla primary coil 301, a secondary coil 302 and a tip conical needle electrode 201 are contained in the gun head 101, a discharge electrode 2 is a metal discharge needle electrode, the metal discharge needle electrode is in a conical shape, the diameter of the conical bottom surface is 4mm, the metal discharge needle electrode is inserted into the top end of the secondary coil, the secondary coil is connected with a primary resonant circuit charging capacitor, the voltage of a power lithium battery 10 is 25V, a ventilation opening 7 is formed in the side wall of one end of the device shell 1 close to a heat dissipation fan 6, 5mm round holes which are not lower than 30 are uniformly formed in the ventilation opening 7, an internal circuit 5 is powered by the power lithium battery 10, the touch screen 4 is used for controlling, the pulse width of a pulse signal can be controlled by the touch screen 4, the Tesla coil 3, the number of turns of the primary coil turns 5T and the secondary coil 70T can be controlled, the pulse width of the square wave pulse signal can be controlled, on one hand, the pulse width of the pulse signal can be controlled, on the tip pulse can be controlled, the tip pulse can be turned on, the side can be controlled, the temperature can be turned off, the temperature can be controlled, the temperature, the heat dissipation fan 6 can be turned on, the other hand, the heat dissipation fan 6 can be well, and the heat dissipation temperature can be further, and the heat dissipation can be turned off, and the heat can be well, and the heat and, can be further, can be turned.

One specific application of this embodiment is: when the handheld medical cold dense air plasma jet spray gun is used, the charging module can charge the lithium ion battery, and the lithium ion battery drives the pulse signal generator to generate square wave pulse signals to drive the IGBT. The touch screen can regulate and control the pulse width of the square wave pulse signal, and control the on time of the IGBT, on one hand, the tip pulse discharge of the discharge needle electrode can be controlled, and the discharge jet temperature is reduced; and on the other hand, the heat dissipation fans are driven to be linked, when the pulse width is widened, the IGBT conduction time is increased, the rotation speed of the heat dissipation fans is increased, the wind speed is increased, and the purpose of cooling the discharge jet flow is achieved. The stable, continuous and high-density cold plasma is generated at the tip of the discharge electrode;

Referring to fig. 3, the gun head comprises a tesla primary coil, a secondary coil 302 and a tip conical needle electrode, wherein the discharge electrode is a metal discharge needle electrode, the diameter of the conical bottom surface is 4mm, the needle electrode is inserted into the top end of the secondary coil, and the secondary coil is connected with a charging capacitor of the oscillating circuit. The tesla discharge process is approximately that a self-excited driving circuit acts on a primary resonant circuit, energy is transmitted from the primary circuit to a secondary circuit through oscillation, the secondary circuit receives the energy, high-frequency high voltage of kilovolts acts on a secondary coil tip discharge electrode, and surrounding air is ionized to discharge, so that low-temperature plasma is generated. By adding a pulse modulation function, the touch screen can regulate and control the pulse width of the square wave pulse signal, and control the on time of the IGBT, on one hand, the tip pulse discharge can be controlled, and the discharge jet flow temperature can be reduced; and meanwhile, the heat dissipation fan is driven to be linked, when the pulse width is widened, the IGBT conduction time is increased, the rotating speed of the heat dissipation fan is increased, the wind speed is increased, the purpose of reducing the discharge jet flow temperature is achieved, and stable, continuous and high-density cold plasma is generated at the tip of the discharge electrode.

In the description herein, reference to the terms "one embodiment," "example," "specific example," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.

Claims (7)

1. A handheld medical cold dense air plasma jet spray gun is characterized in that: the self-excitation pulse type electric power lithium battery comprises a device shell (1) and a discharge electrode (2), a Tesla coil (3), a touch screen (4), an internal circuit (5), a heat dissipation fan (6), a control switch (8) and a power lithium battery (10) which are arranged in the device shell (1), wherein the discharge electrode (2) is arranged at one end part of an inner cavity of the device shell (1), the Tesla coil (3) is connected with the discharge electrode (2), the touch screen (4) is arranged on the right side of the Tesla coil (3), the heat dissipation fan (6) is arranged at one end, far away from the discharge electrode (2), of an inner cavity of the device shell (1), the Tesla coil (3) is connected with the discharge electrode (2), the power lithium battery (10) supplies power to the heat dissipation fan (6) on one hand, and is electrically connected with the touch screen (4), the control switch (8) and the Tesla coil (3) through the internal circuit (5) on the other hand, and finally high-frequency high-voltage of kilovolt level is output to act on the discharge electrode (2) to promote the electrode (2) to discharge, and cold plasma is generated, and the internal circuit (5) comprises a self-excitation pulse driving module (16);

The device comprises a device shell (1) and a device body (102), wherein the device shell is composed of a gun head (101) and a gun body (102), the gun head (101) is in a round table shape and made of ceramic fiber materials, the gun body (102) is in a cylindrical structure which is easy to hold, and the gun head (101) is connected with the gun body (102) through threads;

The gun head (101) comprises a Tesla primary coil (301), a secondary coil (302) and a tip conical needle electrode (201), wherein the discharge electrode (2) is a metal discharge needle electrode, the metal discharge needle electrode is conical, the diameter of the conical bottom surface is 4mm, the metal discharge needle electrode is inserted into the top end of the secondary coil, and the secondary coil is connected with a primary resonant circuit charging capacitor;

the touch screen (4) can regulate and control the pulse width of square wave pulse signals and control the on time of the IGBT, on one hand, the tip pulse discharge can be controlled, the discharge jet flow temperature is reduced, on the other hand, the heat dissipation fan (6) is driven to be linked, when the pulse width is widened, the on time of the IGBT is prolonged.

2. A hand-held medical cold air plasma jet spray gun according to claim 1, wherein: the voltage of the power lithium battery (10) is 25V.

3. A hand-held medical cold air plasma jet spray gun according to claim 1, wherein: the device is characterized in that a vent (7) is formed in the side wall of one end, close to the radiating fan (6), of the device shell (1), and 5mm round holes which are not lower than 30 are uniformly formed in the vent (7).

4. A hand-held medical cold air plasma jet spray gun according to claim 1, wherein: the internal circuit (5) is powered by a power lithium battery (10) and regulated and controlled by the touch screen (4).

5. A hand-held medical cold air plasma jet spray gun according to claim 1, wherein: the touch screen (4) can regulate and control the pulse width of the pulse signal.

6. A hand-held medical cold air plasma jet spray gun according to claim 1, wherein: the tesla coil (3) has a primary coil number of turns 5T and a secondary coil number of turns 70T.

7. A hand-held medical cold air plasma jet spray gun according to claim 1, wherein: the rotating speed of the radiating fan (6) is increased, the wind speed is increased, heating damage caused by overhigh temperature of each component is prevented, on the other hand, the radiating fan (6) drives air to flow, and the discharge jet flow temperature is reduced.