Self-mixing efficient sterilization and disinfection device

Abstract

The utility model discloses a self-mixing efficient sterilization and disinfection device, which belongs to the field of sterilization and disinfection and comprises a venturi tube, the venturi tube comprises an inlet tube, a reducing tube, a throat tube and a diverging tube which are sequentially communicated along the axial direction of the venturi tube, and a plasma power supply is arranged on one side of the venturi tube. The positive electrode of the plasma power supply is electrically connected with a high-voltage electrode, the negative electrode of the plasma power supply is electrically connected with a low-voltage electrode, the high-voltage electrode is arranged in the Venturi tube and sequentially penetrates through the inlet tube and the reducing tube to reach the throat tube, and a high-voltage electrode fixing device is arranged in a discharge space formed by the high-voltage electrode and the low-voltage electrode. The low-voltage electrode is located in the throat pipe, and the lower portion of the throat pipe between the low-voltage electrode and the diverging pipe is communicated with a water source through a pipeline. According to the utility model, the service life of the active particles is effectively prolonged in a Venturi combination mode.

Description

Technical Field

[0001] The utility model belongs to the field of sterilization and disinfection, and relates to a self-mixing high-efficiency sterilization and disinfection device. Background Art

[0002] Traditional sterilization and disinfection uses sodium hypochlorite spray, sodium hypochlorite disinfectant, and liquid disinfectant with sodium hypochlorite as the main component. It can kill intestinal pathogens, pyogenic cocci, and pathogenic yeasts. It can also inactivate viruses. It is often used to disinfect tableware, fruits, general surfaces, and white fabrics. However, sodium hypochlorite is highly irritating, has a certain odor, and has a certain secondary pollution.

[0003] Therefore, active particles produced by plasma discharge are often used to replace sodium hypochlorite. The active particles produced by plasma discharge have stronger bactericidal and disinfecting capabilities, but the existence time of the active particles is shorter. Utility Model Content

[0004] The utility model aims to provide a self-mixing high-efficiency sterilization and disinfection device, which solves the problem that the active particles generated by plasma discharge have a short existence time when used as disinfectants.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A self-mixing high-efficiency sterilization and disinfection device comprises a venturi tube, wherein the venturi tube comprises an inlet tube, a convergent tube, a throat tube and a divergent tube which are sequentially connected along the axial direction thereof, a plasma power supply is arranged on one side of the venturi tube, a positive pole of the plasma power supply is electrically connected to a high-voltage electrode, a negative pole of the plasma power supply is electrically connected to a low-voltage electrode, the high-voltage electrode is arranged inside the venturi tube and sequentially penetrates the inlet tube and the convergent tube to reach the throat tube, a high-voltage electrode fixing device is arranged in the discharge space formed by the high-voltage electrode and the low-voltage electrode, the low-voltage electrode is located inside the throat tube, and a water source is connected to the throat tube between the low-voltage electrode and the divergent tube through a pipeline.

[0007] The utility model effectively prolongs the life of active particles by combining with Venturi. The principle is as follows: the Venturi tube is a pipe structure that contracts first and then gradually expands. When the fluid passes through the Venturi tube, it will experience a process of pressure reduction and velocity increase, especially at the throat, where the flow velocity reaches the maximum and the pressure drops to the minimum; when the fluid passes through the Venturi tube, according to Bernoulli's theorem, the increase in flow velocity will lead to a decrease in pressure, and this pressure reduction will form a low-pressure area at the throat. In this low-pressure area, the collision frequency of active particles will decrease, because their movement speed increases and the distance between them increases. The reduction in collision frequency means that the consumption rate of active particles slows down, thereby prolonging their life. In addition, discharging at the Venturi throat overcomes the problem of discharge difficulties caused by a large discharge gap.

[0008] The disinfection and sterilization principle of the utility model is: the positive electrode of the plasma power supply is electrically connected to the high-voltage electrode, the negative electrode of the plasma power supply is electrically connected to the low-voltage electrode, the space between the high-voltage electrode and the low-voltage electrode forms a plasma reaction zone, a certain flow of oxygen enters the venturi tube, and is accelerated at the throat, the speed can reach ~20m / s, under the condition of plasma dielectric barrier discharge, oxygen is ionized to generate O2 + , O, O3 and other oxidizing particles. The high-velocity gas can effectively take away the heat generated by the electrode discharge. Water is sprayed into the downstream of the throat. The water droplets are atomized and accelerated by the high-speed airflow. The oxidizing particles react with the water molecules by inertial collision to produce O·H2O, O2 + Hydrated oxidizing particles such as ·H2O, O3·H2O effectively reduce the annihilation of active particles and greatly extend the life of O active particles. In the gradually expanding tube, the air flow velocity decreases, the pressure rises, and hydrated oxidizing particle droplets are generated. These hydrated oxidizing particle droplets enter the environment and will re-decompose to produce ·OH, O3, O and other oxidizing particles with high bactericidal ability.

[0009] In addition, the utility model adopts a venturi tube, utilizing the structural advantages of the venturi tube, greatly improving the contact probability between active particles and water molecules, increasing the yield of hydroxyl free radicals, and improving the sterilization and disinfection efficiency.

[0010] Furthermore, the high voltage electrode is a conductive metal rod.

[0011] Furthermore, a high-voltage electrode fixing device for fixing the high-voltage electrode is provided at the inlet of the inlet pipe, at the junction of the inlet pipe and the reducer pipe, and inside the throat pipe;

[0012] The high-voltage electrode fixing device includes an annular fixing ring, the central axis of the annular fixing ring coincides with the central axis of the venturi tube, the outer wall of the annular fixing ring is tightly connected to the corresponding inner wall of the inlet pipe and the throat pipe, the size of the annular fixing ring in the inlet pipe and the throat pipe is adapted to the size of the inlet pipe and the throat pipe, a coaxial annular limiting ring is opened at the center of the annular fixing ring, the high-voltage electrode is fixed in the annular limiting ring, the annular limiting ring is connected and fixed to the annular fixing ring by multiple support rods evenly distributed along the circumference, and a channel for oxygen to pass through is left between adjacent support rods; the annular fixing ring and the annular limiting ring are both annular rings.

[0013] The annular fixing ring in the high-voltage electrode fixing device of the utility model is used to support and fix the high-voltage electrode (conductive metal rod). The annular fixing ring is the supporting structure of the entire device. The annular fixing ring is adapted to the shape of the inlet pipe and throat pipe connected to it, and the connection is firm. Multiple support rods can reinforce the annular limit ring, and gaps are left between adjacent support rods, which will not hinder the passage of oxygen.

[0014] Furthermore, the high voltage electrode is a stainless steel rod, a copper rod or an iron rod.

[0015] Furthermore, the low-voltage electrode is a mesh structure made of conductive metal material, and the low-voltage electrode is evenly wound around the inner wall of the throat.

[0016] Furthermore, the low-voltage electrode is a stainless steel mesh structure, a copper mesh structure, or an iron mesh structure.

[0017] Furthermore, the annular fixing ring and the annular limiting ring are quartz annular rings or ceramic annular rings.

[0018] The quartz ring or the ceramic ring is an insulating ring, and other insulating materials can also be used instead of quartz or ceramic.

[0019] Furthermore, the speed of oxygen passing through the throat is 20 m / s.

[0020] The gas flow rate inside the throat of the utility model is fast, which effectively solves the problem of low yield of active particles caused by heating of the electrode.

[0021] Furthermore, the pipeline is connected to a water source through a metering pump.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0023] 1. The utility model is a self-mixing high-efficiency sterilization and disinfection device, which effectively prolongs the life of active particles through the Venturi combination method;

[0024] 2. The utility model discharges at the venturi throat, overcoming the discharge difficulty problem caused by a large discharge gap;

[0025] 3. The gas flow rate in the Venturi throat of the utility model is fast, which effectively solves the problem of low active particle yield caused by electrode heating;

[0026] 4. In the utility model, the oxygen active particles are mixed with water molecules, which effectively solves the problem of annihilation of oxygen active particles and greatly prolongs the life of active particles;

[0027] 5. The utility model adopts a venturi tube, which greatly improves the contact probability between active particles and water molecules, increases the yield of hydroxyl free radicals, and improves the efficiency of sterilization and disinfection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work, including:

[0029] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0030] Figure 2 It is a schematic diagram of the external structure of the utility model;

[0031] Figure 3 It is a structural schematic diagram of the high voltage electrode fixing device of the utility model.

[0032] Markings in the figure: 1-inlet pipe, 2-convergent pipe, 3-throat, 4-divergent pipe, 5-plasma power supply, 6-high voltage electrode, 7-low voltage electrode, 8-metering pump, 9-high voltage electrode fixing device, 31-pipeline, 91-annular fixing ring, 92-annular limiting ring, 93-support rod, 94-channel. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0035] It should be noted that relational terms such as "first" and "second" are used only 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 terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0037] Example 1

[0038] like Figure 1-Figure 3 As shown, a self-mixing high-efficiency sterilization and disinfection device provided by a preferred embodiment of the utility model includes a venturi tube, the venturi tube includes an inlet tube 1, a tapered tube 2, a throat 3 and a gradually expanding tube 4 connected in sequence along its axial direction, a plasma power supply 5 is provided on one side of the venturi tube, the positive electrode of the plasma power supply 5 is electrically connected to a high-voltage electrode 6, and the negative electrode of the plasma power supply 5 is electrically connected to a low-voltage electrode 7, the high-voltage electrode 6 is arranged inside the venturi tube and sequentially penetrates the inlet tube 1 and the tapered tube 2 to reach the throat 3, the high-voltage electrode 6 is connected and fixed to the inner wall of the venturi tube through an insulated high-voltage electrode fixing device 9, a high-voltage electrode fixing device 9 is provided in the discharge space formed by the high-voltage electrode 6 and the low-voltage electrode 7, the low-voltage electrode 7 is located inside the throat 3, and a water source is connected to the throat 3 below the low-voltage electrode 7 and the gradually expanding tube 4 through a pipe 31. The high-voltage electrode 6 is a conductive metal rod. Preferably, the high-voltage electrode 6 is a stainless steel rod or a copper rod or an iron rod. The low-voltage electrode 7 is a mesh structure of conductive metal material, and the low-voltage electrode 7 is evenly wound on the inner wall of the throat 3. Preferably, the low-voltage electrode 7 is a stainless steel mesh structure or a copper mesh structure or an iron mesh structure. The speed of oxygen passing through the throat 3 is 20m / s. The pipeline 31 is connected to the water source through a metering pump 8.

[0039] The implementation method of the utility model is: a certain flow of oxygen is passed from the inlet pipe into the venturi tube, and the oxygen is accelerated at the throat, and the speed can reach 20m / s. Under the condition of plasma dielectric barrier discharge, the oxygen is ionized to generate O2 +, O, O3 and other oxidizing particles. The high-velocity gas can effectively take away the heat generated by the electrode discharge. Water is sprayed into the downstream of the throat. The water droplets are atomized and accelerated by the high-speed airflow. The oxidizing particles react with the water molecules by inertial collision to produce O·H2O, O2 + Hydrated oxidizing particles such as ·H2O, O3·H2O effectively reduce the annihilation of active particles and greatly extend the life of O active particles. In the gradually expanding tube, the air flow velocity decreases, the pressure rises, and hydrated oxidizing particle droplets are generated. These hydrated oxidizing particle droplets enter the environment and will re-decompose to produce ·OH, O3, O and other oxidizing particles with high bactericidal ability.

[0040] Plasma dielectric barrier discharge is a high-voltage discharge between two electrodes through an insulating dielectric barrier layer. This insulating dielectric barrier layer can cover the electrode or be suspended in the plasma reaction zone. The insulated high-voltage electrode fixing device in the utility model is located in the plasma reaction zone, which is equivalent to the insulating medium between the two electrodes.

[0041] Example 2

[0042] Based on the embodiment 1, this embodiment provides a specific structure and installation position of a high-voltage electrode fixing device 9; in this embodiment, a high-voltage electrode fixing device 9 for fixing the high-voltage electrode 6 is provided at the inlet of the inlet pipe 1, at the junction of the inlet pipe 1 and the reducer 2, and inside the throat pipe 3;

[0043] The high-voltage electrode fixing device 9 includes an annular fixing ring 91, the central axis of the annular fixing ring 91 coincides with the central axis of the venturi tube, the outer wall of the annular fixing ring 91 is tightly connected with the corresponding inner wall of the inlet pipe 1 and the throat pipe 3, the size of the annular fixing ring 91 in the inlet pipe 1 and the throat pipe 3 is adapted to the size of the inlet pipe 1 and the throat pipe 3, a coaxial annular limiting ring 92 is provided at the center of the annular fixing ring 91, the high-voltage electrode 6 is fixed in the annular limiting ring 92, the annular limiting ring 92 is connected and fixed to the annular fixing ring 91 through a plurality of support rods 93 evenly distributed along the circumference, and a channel 94 for oxygen to pass through is left between adjacent support rods 93; the annular fixing ring 91 and the annular limiting ring 92 are both insulating annular rings. The annular fixing ring 91 and the annular limiting ring 92 are quartz annular rings or ceramic annular rings.

[0044] The annular fixing ring in the high-voltage electrode fixing device of the utility model is used to support and fix the high-voltage electrode (conductive metal rod). The annular fixing ring is the supporting structure of the entire device. The annular fixing ring is adapted to the shape of the inlet pipe and throat pipe connected to it, and the connection is firm. Multiple support rods can reinforce the annular limit ring, and gaps are left between adjacent support rods, which will not hinder the passage of oxygen.

[0045] All structural materials in the high-voltage electrode fixing device of the utility model are insulating materials.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-mixing high-efficiency sterilization and disinfection device, characterized in that: The invention comprises a venturi tube, wherein the venturi tube comprises an inlet tube (1), a convergent tube (2), a throat tube (3) and a divergent tube (4) which are connected in sequence along the axial direction thereof; a plasma power source (5) is arranged on one side of the venturi tube; a positive electrode of the plasma power source (5) is electrically connected to a high voltage electrode (6); a negative electrode of the plasma power source (5) is electrically connected to a low voltage electrode (7); the high voltage electrode (6) is arranged inside the venturi tube and passes through the inlet tube (1) and the convergent tube (2) in sequence to reach the throat tube (3); the high voltage electrode (6) is connected and fixed to the inner wall of the venturi tube via an insulated high voltage electrode fixing device (9); a high voltage electrode fixing device (9) is provided in a discharge space formed by the high voltage electrode (6) and the low voltage electrode (7); the low voltage electrode (7) is located inside the throat tube (3); and a water source is connected to the throat tube (3) between the low voltage electrode (7) and the divergent tube (4) via a pipe (31).

2. A self-mixing high-efficiency sterilization and disinfection device according to claim 1, characterized in that: The high voltage electrode (6) is a conductive metal rod.

3. A self-mixing high-efficiency sterilization and disinfection device according to claim 1, characterized in that: A high-voltage electrode fixing device (9) for fixing the high-voltage electrode (6) is provided at the inlet of the inlet pipe (1), at the junction of the inlet pipe (1) and the reducer pipe (2), and inside the throat pipe (3); The high-voltage electrode fixing device (9) comprises an annular fixing ring (91), the central axis of the annular fixing ring (91) coincides with the central axis of the venturi tube, the annular fixing ring (91) is connected and fixed to the inner wall of the corresponding inlet pipe (1) and throat pipe (3), the size of the annular fixing ring (91) inside the inlet pipe (1) and throat pipe (3) is adapted to the size of the inlet pipe (1) and throat pipe (3), a coaxial annular limiting ring (92) is provided at the center of the annular fixing ring (91), the high-voltage electrode (6) is fixed in the annular limiting ring (92), the annular limiting ring (92) is connected and fixed to the annular fixing ring (91) by a plurality of support rods (93) evenly distributed along the circumference, and a channel (94) for oxygen to pass through is left between adjacent support rods (93); the annular fixing ring (91) and the annular limiting ring (92) are both insulating annular rings.

4. A self-mixing high-efficiency sterilization and disinfection device according to claim 2, characterized in that: The high voltage electrode (6) is a stainless steel rod, a copper rod or an iron rod.

5. A self-mixing high-efficiency sterilization and disinfection device according to claim 1, characterized in that: The low-voltage electrode (7) is a mesh structure made of a conductive metal material, and the low-voltage electrode (7) is evenly wound around the inner wall of the throat (3).

6. A self-mixing high-efficiency sterilization and disinfection device according to claim 5, characterized in that: The low-voltage electrode (7) is a stainless steel mesh structure, a copper mesh structure, or an iron mesh structure.

7. A self-mixing high-efficiency sterilization and disinfection device according to claim 3, characterized in that: The annular fixing ring (91) and the annular limiting ring (92) are quartz annular rings or ceramic annular rings.

8. A self-mixing high-efficiency sterilization and disinfection device according to claim 1, characterized in that: The speed of oxygen passing through the throat (3) is 20 m / s.

9. A self-mixing high-efficiency sterilization and disinfection device according to claim 1, characterized in that: The pipeline (31) is connected to a water source via a metering pump (8).

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