A portable sterile water preparation device using plasma technology

Abstract

The application discloses a portable sterile water preparation device using a plasma technology and belongs to the technical field of sterile water preparation. The device comprises a shell, a splash-proof baffle, an end cover, a flow guide device, a sealing cap, a flexible material and a porous medium. The flexible material generates plasma through discharge to fill the closed shell. The porous medium has water absorption and can absorb a liquid to be treated. The plasma diffuses into the porous medium and performs sterilization treatment on the liquid to be treated. The sterile water is prepared through an indirect treatment mode. The device has the advantages of portability, simple operation and safety in the sterile water preparation process.

Description

TECHNICAL FIELD

[0001] The present application relates to the application of plasma technology in life and health, and in particular to a portable sterile water preparation device using plasma technology, belonging to the technical field of sterile water preparation. BACKGROUND

[0002] At present, the commonly used sterile water preparation methods are as follows: filtration method, that is, using a filter membrane with a specific pore size to filter microorganisms and suspended matter in water, but the filtration method may not completely remove some viruses with very small volume and the filter membrane is easy to block and needs to be replaced regularly; ultraviolet sterilization method, that is, using the sterilization effect of ultraviolet rays to destroy the nucleic acid of microorganisms in water, but this method cannot remove chemical pollutants in water and turbid substances in water may block ultraviolet rays; chemical disinfection method, that is, adding chemical disinfectants to kill microorganisms, but chemical substances may be left in the water, affecting the safety of sterile water.

[0003] Plasma is a cloud of charged particles composed of free electrons, ions and excited particles, which can effectively destroy the cell structure of microorganisms to achieve the purpose of sterilization. At present, the preparation of sterile water by using plasma technology is mostly using large and fixed devices, which lack portability and their use scenarios are therefore limited. For example, a dielectric barrier discharge (DBD) device needs to use a large high-voltage power supply to generate plasma and needs to be installed in a fixed position; the working gas of a plasma jet device is mostly inert gas such as helium and argon, which cannot be separated from a complex gas storage device or a high-pressure gas cylinder, so the overall device is relatively large and fixed. In addition, according to whether the plasma directly contacts with the water solution, the process of preparing sterile water can be divided into direct treatment and indirect treatment. The direct treatment method takes the water solution as part of the discharge plasma circuit, and the individual differences will affect the sterilization effect of the plasma, and the change of the dielectric properties of the water solution during the treatment process will in turn affect the properties of the plasma itself, thereby affecting the preparation efficiency of sterile water. The indirect treatment method refers to that the plasma does not directly contact with the treated water solution, and the active particles generated by the plasma are transported to the surface of the water solution by diffusion or gas flow process to produce active effect, however, the short-lived active particles generated by the plasma are not easy to reach the treated water solution, so the concentration of the active particles that can finally reach the surface of the treated water solution cannot reach the sterilization standard, which leads to low efficiency of the indirect treatment method in preparing sterile water.

[0004] In summary, the existing sterile water preparation technology has the defects of inconvenience to carry and low efficiency, and the present application aims to provide a portable sterile water preparation device using plasma technology to overcome the above-mentioned defects. SUMMARY

[0005] The application aims at solving the problems of the prior art, and provides a portable sterile water preparation device using plasma technology.

[0006] The application achieves the above-mentioned application purposes by adopting the following technical scheme.

[0007] The portable sterile water preparation device using plasma technology comprises a shell, a splash-proof baffle, an end cover, a flow guide device, a sealing cap, a flexible material and a porous medium.

[0008] As a further optimization scheme of the portable sterile water preparation device using plasma technology, the shell is a hollow columnar structure with an external thread structure.

[0009] As a further optimization scheme of the portable sterile water preparation device using plasma technology, the splash-proof baffle is provided with a small hole for passing the connecting line of the splash-proof baffle.

[0010] As a further optimization scheme of the portable sterile water preparation device using plasma technology, the end cover is provided with a first through hole, and the positive and negative electrodes of the flexible material extend out of the first through hole and are connected with a power supply.

[0011] As a further optimization scheme of the portable sterile water preparation device using plasma technology, the end cover is integrally formed with the first extrusion disc and the cap, the second through hole, the third groove and the first internal thread are opened on the cap, the first extrusion disc is provided with the second internal thread, and the first extrusion disc is further provided with an integrally formed arc-shaped baffle structure.

[0012] As a further optimization scheme of the portable sterile water preparation device using plasma technology, the flow guide device is a central cylinder, the central cylinder is provided with an upper thread and a lower thread, and the central cylinder is fastened to the second extrusion disc, the water channel in the central cylinder is located at the upper part of the cylinder and leaves a water outlet at the upper part of the cylinder, and the central cylinder is connected to the second internal thread through the second through hole.

[0013] As a further optimization scheme of the portable sterile water preparation device using plasma technology, the sealing cap is provided with a third internal thread, and the central cylinder is connected to the third internal thread through the second through hole.

[0014] As a further optimization scheme of the portable sterile water preparation device using plasma technology, the porous medium is a cylindrical porous sponge.

[0015] As a further optimization scheme of the portable sterile water preparation device using plasma technology, the end cover is further provided with a third groove for placing the end cover sealing ring, and the sealing cap is further provided with a fourth groove for placing the sealing cap sealing ring.

[0016] The sterile water preparation method is realized by the above device, and specifically includes the following steps:

[0017] Step one, place the flexible material into the first groove, and place the splash baffle into the second groove, and the flexible material and the splash baffle placed in the groove cover one half of the circumference of the inner wall of the shell respectively;

[0018] Step two, wrap the cylindrical porous sponge around the central cylinder, the height of the cylindrical porous sponge is the vertical distance from the water outlet to the second extrusion disc, pass the central cylinder through the second through hole on the end cover, connect the lower thread of the central cylinder to the second internal thread to compress the cylindrical porous sponge, and threadedly connect the end cover and the shell through the first internal thread and the shell external thread structure;

[0019] Step three, extend the positive and negative electrode wires of the flexible material from the first through hole, and block the final water outlet, the first through hole and the outlet of the splash baffle connecting wire;

[0020] Step four, connect the power supply through the positive and negative power supply wires of the flexible material, and the flexible material starts to discharge to generate plasma;

[0021] Step five, after the flexible material is discharged for several minutes, the plasma fills the entire inside of the shell, the center cylinder is moved vertically downward, the compressed cylindrical porous sponge is gradually stretched, after the cylindrical porous sponge is fully stretched, the sealing cap is screwed with the upper part of the center cylinder through the third internal thread and the upper thread, water is added through the water channel of the center cylinder until the water outlet of the water channel fully wets the cylindrical porous sponge;

[0022] Step six, the flexible material is discharged for several minutes again until the concentration of plasma in the shell reaches the standard of sterile water preparation, the power supply is cut off, the splash-proof baffle is rotated to the inside of the flexible material through the splash-proof baffle connecting line;

[0023] Step seven, the sealing cap is unscrewed, the center cylinder is moved vertically upward, the final water outlet is opened, and the sterile water is collected.

[0024] As a further improvement of the application: a water storage bag is connected to the final water outlet at the bottom of the shell for collecting the sterile water squeezed out of the porous medium for use.

[0025] As a further improvement of the application: the portable sterile water preparation device using plasma technology further comprises a water delivery bag connected to the water channel of the center cylinder for ensuring that the water to be treated can better enter the water channel.

[0026] The application has the following beneficial effects by adopting the above technical scheme:

[0027] (1) The portable sterile water preparation device using plasma technology provided by the application forms a portable closed device through the cylindrical shell and the cap, generates plasma by supplying power to the flexible material covering the inner wall of the shell, and fills the closed device, the flow guide device is placed in the closed device and can move up and down, the porous medium sleeved on the flow guide device absorbs the surrounding plasma when changing from the compressed state to the stretched state, and then the liquid to be treated is added to the porous medium through the flow guide device for treatment, and the splash-proof baffle is used to shield the flexible material when water is squeezed out to prevent the flexible material from stopping discharging after being wet, so that the plasma indirectly treats the aqueous solution, and compared with the direct treatment method, the indirect treatment can improve the stability and efficiency of the plasma in preparing sterile water, the prepared sterile water does not have problems such as chemical residues, and the prepared sterile water can meet the medical sterilization standard.

[0028] (2) The portable sterile water preparation device using plasma technology provided by the application adopts a compact and ingenious design, the flexible material and the splash-proof baffle are placed in the groove in the cylindrical shell, and the device has the advantages of small size, easy portability and wide application scenarios.

[0029] (3) The portable sterile water preparation device provided by the application utilizes plasma technology, is made of transparent material, and can well observe the discharge generated plasma in the shell. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a working schematic diagram of the portable sterile water preparation device provided by the application.

[0031] Fig. 2(a) is a three-dimensional top view of the portable sterile water preparation device provided by the application, Fig. 2(b) is a three-dimensional bottom view of the portable sterile water preparation device provided by the application, and Fig. 2(c) is a sectional view of the portable sterile water preparation device provided by the application.

[0032] Fig. 3(a) is a three-dimensional top view of the shell of the portable sterile water preparation device provided by the application, Fig. 3(b) is a three-dimensional bottom view of the shell of the portable sterile water preparation device provided by the application, and Fig. 3(c) is a sectional view of the shell of the portable sterile water preparation device provided by the application.

[0033] Figure 4 is a structural diagram of the splash-proof baffle of the portable sterile water preparation device provided by the application.

[0034] Figure 5 is a structural diagram of the flexible material of the portable sterile water preparation device provided by the application.

[0035] Fig. 6(a) is a three-dimensional top view of the end cover of the portable sterile water preparation device provided by the application, Fig. 6(b) is a three-dimensional bottom view of the end cover of the portable sterile water preparation device provided by the application, and Fig. 6(c) is a sectional view of the end cover of the portable sterile water preparation device provided by the application.

[0036] Fig. 7(a) is a three-dimensional top view of the center cylinder of the portable sterile water preparation device provided by the application, and Fig. 7(b) is a sectional view of the center cylinder of the portable sterile water preparation device provided by the application.

[0037] Fig. 8(a) is a three-dimensional bottom view of the sealing cap of the portable sterile water preparation device provided by the application, and Fig. 8(b) is a sectional view of the sealing cap of the portable sterile water preparation device provided by the application.

[0038] Explanations of the reference numerals in the drawings: 1, housing; 2, splash-proof baffle; 3, flexible material; 4, cylindrical porous sponge; 5, end cover; 6, central cylinder; 7, sealing cap; 8, power supply; 9, positive power supply line; 10, negative power supply line; 11, external thread of the housing; 12, supporting cylinder; 13, final water outlet; 14, funnel-shaped bottom surface; 15, first groove; 16, second groove; 17, outlet of the splash-proof baffle connecting line; 18, small hole; 19, positive electrode of the flexible material; 20, negative electrode of the flexible material; 21, first through hole; 22, arc-shaped baffle; 23, first extrusion disc; 24, third groove; 25, first internal thread; 26, second internal thread; 27, upper thread; 28, water outlet of the water channel; 29, lower thread; 30, second extrusion disc; 31, water channel; 32, fourth groove; 33, third internal thread; 34, second through hole. DETAILED DESCRIPTION

[0039] The technical solutions of the application will be described in detail below with reference to the drawings.

[0040] The portable sterile water preparation device using the plasma technology provided by the application comprises a housing 1, a splash-proof baffle 2, an end cover 5, a central cylinder 6, a sealing cap 7, a flexible material 3, and a cylindrical porous sponge 4. Figure 1 As shown in FIG. 2(b) and FIG. 2(c), the portable sterile water preparation device using the plasma technology comprises a housing 1, a splash-proof baffle 2, an end cover 5, a central cylinder 6, a sealing cap 7, a flexible material 3, and a cylindrical porous sponge 4. The housing 1 is provided with a final water outlet 13 at the bottom. The end cover 5 has a first extrusion structure. The central cylinder 6 is internally provided with a water channel structure and has a structure extending out of the end cover 5 and a second extrusion structure. The end cover 5 is threadedly connected with the housing 1. The central cylinder 6 is arranged in the housing 1. The structure extending out of the end cover 5 of the central cylinder 6 is threadedly connected with the sealing cap 7. The cylindrical porous sponge 4 is sleeved on the central cylinder 6 and covers the area between the water outlet of the water channel structure and the second extrusion structure. The flexible material 3 is attached to the inner wall of the housing 1 and covers half of the circumference of the inner wall of the housing 1. The splash-proof baffle 2 is arranged in the housing 1 and covers half of the circumference of the inner wall of the housing 1. The electrodes of the flexible material are connected with the positive power supply line 9 and the negative power supply line 10 of the power supply 8. When the flexible material 3 discharges to generate plasma under the excitation of the power supply, the splash-proof baffle 2 and the flexible material 3 cover half of the circumference of the inner wall of the housing 1, respectively. After the discharge of the flexible material 3 ends, the splash-proof baffle 2 shields the flexible material 3.

[0041] As shown in Fig. 3(a), Fig. 3(b), Fig. 3(c), the shell has a funnel-shaped bottom surface 14, which is provided with a final water outlet 13. The funnel-shaped bottom surface 14 can ensure that the sterile water squeezed out of the cylindrical porous sponge can flow out of the final water outlet 13 without remaining on the inner wall of the device shell 1. The funnel-shaped bottom surface 14 is connected with three supporting cylinders 12, which are used to support the entire device shell. The shell 1 is internally provided with a first groove 15 for installing flexible materials and a second groove 16 for installing a splash-proof baffle. The first groove 15 and the second groove 16 are both annular grooves, and the second groove 16 is located inside the first groove 15. The shell 1 is also provided with an outlet 17 for passing out the splash-proof baffle connecting line.

[0042] As shown in Fig. 3(a), Fig. 3(b), Fig. 3(c), the shell has a funnel-shaped bottom surface 14, which is provided with a final water outlet 13. The funnel-shaped bottom surface 14 can ensure that the sterile water squeezed out of the cylindrical porous sponge can flow out of the final water outlet 13 without remaining on the inner wall of the device shell 1. The funnel-shaped bottom surface 14 is connected with three supporting cylinders 12, which are used to support the entire device shell. The shell 1 is internally provided with a first groove 15 for installing flexible materials and a second groove 16 for installing a splash-proof baffle. The first groove 15 and the second groove 16 are both annular grooves, and the second groove 16 is located inside the first groove 15. The shell 1 is also provided with an outlet 17 for passing out the splash-proof baffle connecting line. Figure 4 As shown in Fig. 3(a), Fig. 3(b), Fig. 3(c), the shell has a funnel-shaped bottom surface 14, which is provided with a final water outlet 13. The funnel-shaped bottom surface 14 can ensure that the sterile water squeezed out of the cylindrical porous sponge can flow out of the final water outlet 13 without remaining on the inner wall of the device shell 1. The funnel-shaped bottom surface 14 is connected with three supporting cylinders 12, which are used to support the entire device shell. The shell 1 is internally provided with a first groove 15 for installing flexible materials and a second groove 16 for installing a splash-proof baffle. The first groove 15 and the second groove 16 are both annular grooves, and the second groove 16 is located inside the first groove 15. The shell 1 is also provided with an outlet 17 for passing out the splash-proof baffle connecting line.

[0043] As shown in Fig. 3(a), Fig. 3(b), Fig. 3(c), the shell has a funnel-shaped bottom surface 14, which is provided with a final water outlet 13. The funnel-shaped bottom surface 14 can ensure that the sterile water squeezed out of the cylindrical porous sponge can flow out of the final water outlet 13 without remaining on the inner wall of the device shell 1. The funnel-shaped bottom surface 14 is connected with three supporting cylinders 12, which are used to support the entire device shell. The shell 1 is internally provided with a first groove 15 for installing flexible materials and a second groove 16 for installing a splash-proof baffle. The first groove 15 and the second groove 16 are both annular grooves, and the second groove 16 is located inside the first groove 15. The shell 1 is also provided with an outlet 17 for passing out the splash-proof baffle connecting line. Figure 1 、 Figure 5 As shown in Fig. 2(a), the end cap is provided with a first through hole 21. When the flexible material is bent and placed in the shell, the flexible material is unfolded and adheres to the inner wall of the shell due to its own resilience. The positive electrode 19 of the flexible material extends out of the first through hole 21 of the end cap and is connected with the positive electrode power line 9. The negative electrode 20 of the flexible material extends out of the first through hole 21 of the end cap and is connected with the negative electrode power line 10.

[0044] As shown in Fig. 6(a), Fig. 6(b), Fig. 6(c), the end cap is integrally formed with a first pressing disc 23. The cap is provided with a second through hole 34, a third groove 24 for placing a sealing ring of the end cap, and a first internal thread 25. The first pressing disc 23 is provided with a second internal thread 26. The first pressing disc 23 also has an integrally formed arc-shaped baffle 22 structure.

[0045] As shown in Figures 7(a) and 7(b), the central cylinder has an upper thread 27 and a lower thread 29, and the bottom of the central cylinder 6 is tightly connected to the second extrusion plate 30. The water channel 31 built into the central cylinder is located at the upper part of the cylinder and has a water outlet 28 on the cylinder. The cylindrical porous sponge 4 is sleeved on the central cylinder between the water outlet 28 and the second extrusion plate 30.

[0046] As shown in Figures 7(a), 8(a), and 8(b), the sealing cap has a fourth groove 32 for placing the sealing ring of the sealing cap and a third internal thread 33. The upper part of the central cylinder passes through the second through hole 34 shown in Figure 6(b). The lower part of the central cylinder is threaded to the sealing cap through the lower thread 29 and the second internal thread 26, and the upper part of the central cylinder is threaded to the sealing cap through the upper thread 27 and the third internal thread 33.

[0047] The method of using the portable sterile water preparation device proposed in this invention consists of the following seven steps.

[0048] Step 1: Assemble the various modules of the device, remove the sealing cap 7, end cap 5, central cylinder 6, and cylindrical porous sponge 4, and remove the flexible material 3 and splash guard 2. Place the flexible material 3, which generates plasma through discharge, into the first groove 15 on the inner wall of the housing. This flexible material can cover half a circumference of the inner wall of the housing and is annular. Then... Figure 4 The splash guard shown is placed in the second groove 16 on the inner wall of the housing shown in Figure 3(c). This splash guard is also annular and can cover half a circumference of the inner wall of the housing. At the same time, the splash guard 2 can also rotate to the inside of the flexible material 3 through the annular second groove 16. After the flexible material 3 and the splash guard 2 are placed, they respectively cover two semicircles of the inner wall 1 of the housing. Since water does not need to be squeezed out at the beginning, the splash guard 2 cannot block the flexible material 3, so as to prevent the plasma generated by the discharge of the flexible material from being blocked by the splash guard and unable to diffuse into the interior of the housing.

[0049] Step 2: As shown in Figure 2, a cylindrical porous sponge 4 is fitted onto the central cylinder 6. The height of the sponge is the vertical distance from the water outlet 28 to the second extrusion plate 30. Then, the central cylinder shown in Figure 7(a) is passed through the second through hole 34 shown in Figure 6(c). The lower part of the central cylinder is threaded to the end cap through the lower thread 29 and the second internal thread 26. At this time, the cylindrical porous sponge 4 is in a compressed state. Then, the relative positions of the central cylinder 6 and the end cap 5 are kept unchanged. Then, the end cap 5 is screwed onto the housing 1 through the first internal thread 25 and the housing external thread 11 shown in Figure 3(a). The end cap sealing ring is placed in the third groove 24 shown in Figure 6(c). This can ensure that the end cap and the housing can be sealed when screwed together, preventing the plasma generated inside the housing from escaping.

[0050] Third step: the flexible material positive electrode 19 and the flexible material negative electrode 20 are extended from the first through hole 21 shown in Fig. 6(a), then the final water outlet 13 is blocked, the first through hole 21 where the flexible material electrode wire is extended is also sealed, and the outlet 17 of the splash-proof baffle connecting wire is also blocked. The purpose of this is to ensure that the entire device is sealed when the flexible material discharges to generate plasma, and the plasma does not escape.

[0051] Fourth step: the flexible material positive and negative electrodes are connected to the power supply 8 through the positive electrode power supply wire 9 and the negative electrode power supply wire 10, and the flexible material begins to discharge to generate plasma. The plasma will gradually fill the entire interior of the shell.

[0052] Fifth step: after discharging for a few minutes, the central cylinder 6 is moved vertically downward. At this time, the originally compressed cylindrical porous sponge expands. During the expansion process, the sponge absorbs part of the plasma inside the shell into the sponge interior. After the cylindrical porous sponge is completely expanded, the sealing cap 7 is screwed onto the upper part of the central cylinder through the third internal thread 33 and the upper thread 27. The fourth groove 32 shown in Fig. 8(a) is used to place the sealing ring of the sealing cap, so that the sealing cap can be tightly attached to the end cover to prevent plasma from escaping from above the central cylinder. Then water is added through the water channel 31 of the central cylinder shown in Fig. 7(b), and the water outlet 28 of the water channel is directly below the cylindrical porous sponge 4, so the water enters the sponge and fully wets the sponge. Since the sponge has absorbed part of the plasma before the water is added, the plasma can fully mix with the water, and the plasma can destroy the cell structure of the microorganisms in the water.

[0053] Sixth step: discharge for a few more minutes to ensure that the concentration of plasma in the shell is higher, and more plasma diffuses into the sponge interior, so that the treatment effect on the water inside the sponge is better, and the sterile water standard can be better achieved. After the discharge is completed, the power supply is disconnected, and the splash-proof baffle 2 is rotated in the second groove 16 by pulling the line through the small hole 18 and the outlet 17 of the splash-proof baffle connecting wire, until the splash-proof baffle is rotated to the semicircular circumference of the inner wall of the shell where the flexible material is located, thereby completely blocking the flexible material.

[0054] Seventh step: unscrew the sealing cap 7 and pull the central cylinder 6 vertically upward. In this way, under the action of the first extrusion disc 23 and the second extrusion disc 30, the sterile water in the sponge is squeezed out, and the arc-shaped baffle 22 can to some extent ensure that water does not splash onto the surrounding flexible material when the sponge is squeezed. Then collect the sterile water through the final water outlet 13.

[0055] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above specific embodiments, and the above specific embodiments and the description in the specification are only for further illustrating the principles and preparation effects of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A portable sterile water preparation device using a plasma technique, characterized by, The application relates to a portable sterile water preparation device based on plasma technology, which comprises a shell, a splash-proof baffle, an end cover, a flow guide device, a sealing cap, flexible material and porous medium. The shell is a hollow cylindrical structure with an external thread structure, the shell is internally provided with a first groove for mounting the flexible material and a second groove for mounting the splash-proof baffle, the first groove and the second groove are annular grooves, and the second groove is located in the first groove, and an outlet for connecting a line of the splash-proof baffle is further arranged on the shell.

2. The portable sterile water preparation apparatus using a plasma technique according to claim 1, wherein, A small hole is arranged on the splash-proof baffle for passing out a line of the splash-proof baffle.

3. The portable apparatus for producing sterile water using plasma technology according to claim 2, wherein A first through hole is arranged on the end cover, and positive and negative poles of the flexible material extend out of the first through hole and are connected with a power supply.

4. The portable apparatus for producing sterile water using plasma technology according to claim 3, wherein The end cover is integrally formed with a cap and a first extrusion disc, the cap is provided with a second through hole, a third groove and a first internal thread, the first extrusion disc is provided with a second internal thread, and the first extrusion disc further has an integrally formed arc-shaped baffle structure, and the end cover and the shell are connected and screwed through the first internal thread and the external thread structure of the shell.

5. The portable apparatus for producing sterile water using plasma technology according to claim 4, wherein The flow guide device is a central cylinder, the central cylinder is provided with an upper thread and a lower thread, and the central cylinder is tightly connected with a second extrusion disc at the bottom, and a water channel arranged in the central cylinder is located at the upper part of the cylinder and has a water outlet at the upper part of the cylinder, and the central cylinder is connected with the second internal thread through the lower thread after passing through the second through hole.

6. The portable apparatus for producing sterile water using plasma technology according to claim 5, wherein The sealing cap is provided with a third internal thread, and the central cylinder is connected with the third internal thread through the upper thread after passing through the second through hole.

7. The portable apparatus for producing sterile water using plasma technology according to claim 6, wherein The porous medium is a cylindrical porous sponge.

8. The portable apparatus for producing sterile water using plasma technology according to claim 7, wherein The end cover is further provided with a third groove for placing a sealing ring of the end cover, and the sealing cap is further provided with a fourth groove for placing a sealing ring of the sealing cap.

9. The portable apparatus for producing sterile water using plasma technology according to claim 8, wherein, The application is realized through the portable sterile water preparation device based on plasma technology, and specifically comprises the following steps:

10. A method for the preparation of sterile water, characterized in that, Step one: the flexible material is placed in the first groove, and the splash-proof baffle is placed in the second groove, and the flexible material and the splash-proof baffle placed in the grooves cover one half of the inner wall of the shell respectively; Step two: the cylindrical porous sponge is sleeved on the central cylinder, the height of the cylindrical porous sponge is equal to the vertical distance from the water outlet to the second extrusion disc, the central cylinder is passed through the second through hole of the end cover, the lower thread of the central cylinder is connected with the second internal thread to compress the cylindrical porous sponge, and the end cover and the shell are screwed through the first internal thread and the external thread structure of the shell. ​ Step three, the positive and negative electrode wires of the flexible material are extended from the first through hole, and the outlet of the connection line of the splash-proof baffle is plugged; Step four, the positive and negative electrode wires of the flexible material are connected to the power supply through the positive and negative electrode wires, and the flexible material starts to discharge to generate plasma; Step five, after the flexible material discharges for several minutes, the plasma diffuses and fills the entire shell, the center cylinder is moved vertically downward, the cylindrical porous sponge in the compressed state is gradually stretched, and after the cylindrical porous sponge is completely stretched, the sealing cap is screwed with the upper part of the center cylinder through the third internal thread and the upper thread connection, water is added through the water channel of the center cylinder until the water outlet of the water channel fully wets the cylindrical porous sponge; Step six, the flexible material is discharged for several minutes again until the concentration of plasma in the shell reaches the standard of sterile water preparation, the power supply is cut off, and the splash-proof baffle is rotated to the inside of the flexible material through the splash-proof baffle connection line; Step seven, unscrew the sealing cap, move the center cylinder vertically upward, open the final water outlet, and collect the sterile water.

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