A low-temperature plasma high-voltage pulse generator device

Abstract

The present invention discloses a low-temperature plasma high-voltage pulse generator device, which includes an insulating housing, a pulse generator assembly, an incoming high-voltage connector, an outgoing high-voltage connector, an isolation sleeve, and a resistor. The insulating housing is provided with a mounting slot, an incoming slot, and an outgoing slot. The mounting slot is located on one side of the incoming slot and the outgoing slot. The pulse generator assembly is disposed in the mounting slot. One end of the incoming slot and the outgoing slot is provided with an incoming high-voltage connector and an outgoing high-voltage connector, respectively. The other end of the incoming slot is provided with an isolation sleeve, and the resistor is disposed in the isolation sleeve. The present invention integrates the high-voltage working components into one body and compresses them into a small box, thereby miniaturizing the high-voltage pulse generator. This changes the current situation in which high-voltage equipment can only be applied to industry and large-scale equipment, making it convenient to apply to small equipment. It can be well applied in many fields such as sewage treatment, flue gas treatment, disinfection and sterilization, and medical equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of power pulse discharge, and in particular to a low-temperature plasma high-voltage pulse generator device. Background Art

[0002] At present, the main disinfection and sterilization methods include chemical spraying, high temperature, steaming and ultraviolet irradiation. Among them, chemical disinfection and sterilization uses bactericides that have a killing effect on microorganisms to kill bacteria, viruses and other microorganisms; high temperature and steaming use high temperature to denature the protein of the virus, thereby losing its activity, to achieve the purpose of killing bacteria, viruses and other microorganisms; ultraviolet irradiation uses ultraviolet rays emitted by ultraviolet lamps to kill bacteria, viruses and other microorganisms. These methods cannot be used for the disinfection and sterilization of cold chain foods, logistics packages, fruits and vegetables, and agricultural residues.

[0003] Since low-temperature plasma has the characteristics of high electron temperature and low gas temperature, the highly active free radical gas generated by high-voltage pulse corona discharge directly acts on the surface of the object to be disinfected, achieving all-round, rapid and non-destructive disinfection and sterilization without dead ends, filling the gap in traditional disinfection and sterilization methods. Therefore, its application in rapid and non-destructive disinfection and sterilization in cold chain food, agricultural residues of fruits and vegetables, baby products and toys, medical equipment and instruments, and indoor air purification has received widespread attention.

[0004] However, in the application of low-temperature plasma high-voltage pulse generator devices, due to the technical characteristics of high voltage and large instantaneous current and the breakdown and creepage characteristics of high voltage, sufficient air gaps must be left between the high-voltage devices and the cabinet and other conductive devices. This results in the plasma high-voltage pulse generator devices being usually large and bulky, making them difficult to miniaturize and apply in the field of mold disinfection. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a low-temperature plasma high-voltage pulse generator device.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A low-temperature plasma high-voltage pulse generator device includes an insulating shell, a pulse generator assembly, an incoming high-voltage connector, an outgoing high-voltage connector, an isolation sleeve, and a resistor. The insulating shell is provided with a mounting slot, an incoming slot, and an outgoing slot. The mounting slot is located on one side of the incoming slot and the outgoing slot. The mounting slot, the incoming slot, and the outgoing slot are separated from each other. The pulse generator assembly is arranged in the mounting slot. The incoming high-voltage connector and the outgoing high-voltage connector are respectively provided at one end of the incoming slot and the outgoing slot. The isolation sleeve is provided at the other end of the incoming slot. The resistor is arranged in the isolation sleeve.

[0008] Preferably, the insulating shell includes a lower insulating shell and an upper insulating shell that are nested together, the lower insulating shell has a lower cavity with an opening facing upward, and a lower mounting groove, a lower wire inlet groove and a lower wire outlet groove are provided in the lower cavity, the upper insulating shell has an upper cavity with an opening facing downward, and an upper mounting groove, an upper wire inlet groove and an upper wire outlet groove are provided in the upper cavity, the lower mounting groove and the upper mounting groove constitute the mounting groove, the lower wire inlet groove and the upper wire inlet groove are nested together to form the wire inlet groove, and the lower wire outlet groove and the upper wire outlet groove are nested together to form the wire outlet groove.

[0009] Preferably, the height of the lower inlet trough is higher than that of the lower outlet trough, the height of the upper inlet trough is lower than that of the upper outlet trough, and the inlet high-voltage connector and the outlet high-voltage connector are respectively arranged in the lower inlet trough and the lower outlet trough.

[0010] Preferably, the lower wire inlet groove includes a first wiring groove, a first groove and a second groove, the first groove and the second groove are respectively provided on the left and right sides of the first wiring groove, the lower end of the isolation sleeve is provided in the first groove, the incoming wire high-voltage connector is provided in the second groove, the lower wire outlet groove includes a second wiring groove and a third groove, the third groove is provided on the right side of the second wiring groove, and the outgoing wire high-voltage connector is provided in the third groove.

[0011] Preferably, the first groove is a chamfered circular groove, a placement groove is provided at the bottom of the first groove, the resistor is installed in the placement groove, the cross-sectional shape of the isolation sleeve is adapted to the first groove, and a vent is provided on the isolation sleeve.

[0012] Preferably, a first flange is formed on the top of the lower wire inlet trough, and the first flange is nested with the upper wire inlet trough. A second flange is formed on the top of the lower wire outlet trough, and the second flange is nested with the upper wire outlet trough.

[0013] Preferably, the lower insulating shell and the upper insulating shell are formed by injection molding, the inner wall of the lower insulating shell is provided with a first step portion, the outer wall of the upper insulating shell is provided with a second step portion, and the first step portion and the second step portion are nested and matched.

[0014] Preferably, a high-voltage line channel is provided in the upper line inlet groove and the upper line outlet groove, the upper line inlet groove includes a third wiring groove and a fourth groove, the upper end of the isolation sleeve is provided in the fourth groove, the fourth groove is a chamfered circular groove, and a partition is provided between the upper mounting groove and the fourth groove, and the partition is formed by extending downward from the top of the upper cavity.

[0015] Preferably, a heat dissipation air inlet hole and a heat dissipation air outlet hole are provided on the side of the upper insulating shell, and the heat dissipation air inlet hole and the heat dissipation air outlet hole are communicated with the fourth groove.

[0016] Preferably, a first heat dissipation hole is provided on the side of the lower insulating shell, the first heat dissipation hole is communicated with the lower cavity, and a second heat dissipation hole is provided on the top of the upper mounting groove.

[0017] After adopting the above technical solution, the present invention has the following advantages compared with the background technology:

[0018] 1. In the present invention, an installation groove, an input groove and an output groove are provided in the insulating shell, the pulse generator assembly is arranged in the installation groove, and the input groove and the output groove are respectively provided with an input high-voltage connector and an output high-voltage connector. The resistor is arranged in the input groove through an isolation sleeve. By integrating the high-voltage working components into one and compressing them into a small box, the high-voltage pulse generator is miniaturized, which changes the current situation that most high-voltage equipment can only be used in industry and large equipment, so that it can be conveniently used in small equipment, and can be well applied in many fields such as sewage treatment, flue gas treatment, disinfection and sterilization, and medical equipment.

[0019] 2. The present invention achieves high-efficiency heat dissipation of the resistor through the vent holes on the isolation sleeve, the heat dissipation air inlet holes and the heat dissipation air outlet holes on the upper insulating shell. At the same time, the heat dissipation of the pulse generator assembly is achieved through the heat dissipation air path formed by the first heat dissipation hole of the lower insulating shell, the air pipe, the air pipe joint at the bottom of the pulse generator assembly, and the heat dissipation air outlet holes of the upper insulating shell, thereby solving the heat dissipation problem caused by the miniaturization of high-voltage devices, and meeting the functional requirements while reducing the volume.

[0020] 3. The main insulating components in the present invention can all be produced by injection molding, which can greatly reduce manufacturing costs and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0022] Figure 2 It is an exploded schematic diagram of the present invention;

[0023] Figure 3 is a cross-sectional view of the present invention;

[0024] Figure 4 A top view of the lower insulating shell of the present invention;

[0025] Figure 5 is a three-dimensional schematic diagram of the lower insulating shell of the present invention;

[0026] Figure 6 This is one of the cross-sectional views of the lower insulating shell of the present invention;

[0027] Figure 7 This is the second cross-sectional view of the lower insulating shell of the present invention;

[0028] Figure 8 A bottom view of the upper insulating shell of the present invention;

[0029] Figure 9 is a three-dimensional schematic diagram of the upper insulating shell in the present invention;

[0030] Figure 10 This is one of the cross-sectional views of the upper insulating shell of the present invention;

[0031] Figure 11 This is the second cross-sectional view of the upper insulating shell of the present invention;

[0032] Figure 12 Schematic diagram of the structure of the isolation sleeve in the present invention;

[0033] Figure 13 Schematic diagram of the structure of the incoming high-voltage connector and the outgoing high-voltage connector in the present invention;

[0034] Figure 14 This is a principle block diagram of the present invention.

[0035] Description of reference numerals:

[0036] Lower insulating shell 100, first step portion 110, lower mounting groove 120, lower wire inlet groove 130, first flange 131, first wiring groove 132, first groove 133, second groove 134, placement groove 135, lower wire outlet groove 140, second flange 141, second wiring groove 142, third groove 143, first heat dissipation hole 150;

[0037] Upper insulating shell 200, second step portion 210, upper mounting groove 220, upper wire inlet groove 230, third wiring groove 231, fourth groove 232, upper wire outlet groove 240, high-voltage wire inlet channel 250, partition 260, heat dissipation air inlet hole 270, heat dissipation air outlet hole 280, second heat dissipation hole 290;

[0038] Pulse generator assembly 300;

[0039] Incoming high-voltage connector 400;

[0040] Outlet high voltage connector 500;

[0041] Isolation sleeve 600, vent hole 610;

[0042] Resistor 700. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, it should be noted that:

[0044] The terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element of the present invention must have a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0045] When an element is referred to as being “fixed to,” “disposed on,” or “provided on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0046] Unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0047] Example

[0048] Cooperate Figures 1 to 3 As shown, the present invention discloses a low-temperature plasma high-voltage pulse generator device, including an insulating shell, a pulse generator component 300, an incoming high-voltage connector 400, an outgoing high-voltage connector 500, an isolation sleeve 600 and a resistor 700.

[0049] The insulating housing is provided with a mounting slot, an inlet slot, and an outlet slot. The mounting slot is located on one side of the inlet and outlet slots. The mounting slot, inlet and outlet slots are separated from each other. The pulse generator assembly 300 is provided in the mounting slot. The width of the mounting slot is slightly larger than the pulse generator assembly 300, so that the pulse generator assembly 300 is easy to place but not easy to shake. The inlet and outlet slots are provided with an inlet high-voltage connector 400 and an outlet high-voltage connector 500 at one end, respectively. The other end of the inlet slot is provided with an isolation sleeve 600, and the resistor 700 is provided in the isolation sleeve 600. While meeting the requirements of high voltage and high current operation, the volume of the high-voltage pulse generator is compressed as much as possible, and the high-voltage components required are installed in a smaller insulating housing, thereby realizing the miniaturization of the high-voltage pulse generator.

[0050] Cooperate Figure 2 、 Figure 5 、 Figure 9As shown, the insulating shell includes a lower insulating shell 100 and an upper insulating shell 200 that are nested together. The lower insulating shell 100 and the upper insulating shell 200 are made of injection molding. The inner wall of the lower insulating shell 100 is provided with a first step portion 110, and the outer wall of the upper insulating shell 200 is provided with a second step portion 210. The first step portion 110 and the second step portion 210 are nested together. Through the nesting, the creepage distance to the outside can be increased.

[0051] The lower insulating shell 100 and the upper insulating shell 200 are both made of PC plastic CNC processing. PC plastic has good insulation performance, a dielectric constant of 25.2, a dielectric strength of 27KV / mm, and a minimum wall thickness of 7.5mm, which can ensure that there will be no external breakdown when the maximum voltage is increased to 100KV.

[0052] Cooperate Figure 2 、 Figure 12 、 Figure 13 As shown, the high-voltage connector is a cylindrical body machined from a copper rod. The center of the left column has a through hole for the high-voltage banana plugs for the incoming and outgoing wires. The right side has a screw hole for connecting the wires. All corners are rounded to prevent tip discharge. The isolation sleeve 600 is a chamfered ring CNC-machined from PC material. The chamfered edge is used for positioning and ensures that the vent 610 is connected to the upper insulating shell 200. The inner hole of the isolation sleeve 600 is slightly larger than that of the resistor 700 and is concentric with the resistor 700. The gap between the isolation sleeve and the resistor 700 provides heat dissipation space.

[0053] Cooperate Figure 2 、 Figures 4 to 11 As shown, the lower insulating housing 100 has an upwardly opening lower cavity, within which are disposed a lower mounting groove 120, a lower inlet groove 130, and a lower outlet groove 140. The upper insulating housing 200 has a downwardly opening upper cavity, within which are disposed an upper mounting groove 220, an upper inlet groove 230, and an upper outlet groove 240. The lower mounting groove 120 and the upper mounting groove 220 form the mounting groove, the lower inlet groove 130 and the upper inlet groove 230 nest together to form the inlet groove, and the lower outlet groove 140 and the upper outlet groove 240 nest together to form the outlet groove.

[0054] In this embodiment, a first flange 131 is formed on the top of the lower wire inlet groove 130, and the first flange 131 is nested with the upper wire inlet groove 230. A second flange 141 is formed on the top of the lower wire outlet groove 140, and the second flange 141 is nested with the upper wire outlet groove 240. Through the nesting, the charged components in the groove have a higher degree of sealing, which not only increases the creepage distance, but also makes the creepage path of other components tortuous, thereby avoiding creepage between the lower end of the high-power resistor 700 and the outlet high-voltage connector 500.

[0055] In this embodiment, the height of the lower inlet trough 130 is higher than that of the lower outlet trough 140, and the height of the upper inlet trough 230 is lower than that of the upper outlet trough 240. The incoming high-voltage connector 400 and the outgoing high-voltage connector 500 are respectively disposed in the lower inlet trough 130 and the lower outlet trough 140. This allows the incoming high-voltage connector 400 and the outgoing high-voltage connector 500 to be spatially staggered in height and not on the same plane, ensuring sufficient creepage distance and making breakdown less likely. In this embodiment, an interference fit is employed between the incoming high-voltage connector 400 and the lower inlet trough 130, and between the outgoing high-voltage connector 500 and the lower outlet trough 140.

[0056] The lower inlet trough 130 includes a first wiring groove 132, a first groove 133, and a second groove 134. The first wiring groove 132 is used for routing wires. The first groove 133 and the second groove 134 are respectively provided on the left and right sides of the first wiring groove 132. The lower end of the isolation sleeve 600 is disposed in the first groove 133, and the incoming high-voltage connector 400 is disposed in the second groove 134. The lower outlet trough 140 includes a second wiring groove 142 and a third groove 143. The second wiring groove 142 is used for routing wires. The third groove 143 is provided to the right of the second wiring groove 142, and the outgoing high-voltage connector 500 is disposed in the third groove 143.

[0057] In this embodiment, the first groove 133 is a chamfered circular groove, and a placement groove 135 is provided at the bottom of the first groove 133. The resistor 700 is installed in the placement groove 135. The cross-sectional shape of the isolation sleeve 600 is adapted to the first groove 133. A vent 610 is provided on the isolation sleeve 600. The resistor 700 is embedded in the placement groove 135. The resistor 700 isolation sleeve 600 can isolate the high-power resistor 700 from the pulse generator assembly 300 and form a relatively independent space around the resistor 700, so that the heat dissipation air utilization rate of the resistor 700 is higher, the heat dissipation efficiency is improved, and the creepage distance between the bottom of the resistor 700 and the pulse generator assembly 300 is increased.

[0058] A high-voltage incoming line channel 250 is provided in the upper incoming line trough 230 and the upper outgoing line trough 240. The depth of the high-voltage incoming line channel 250 is greater than 200 mm, ensuring sufficient creepage distance between the incoming high-voltage connector 400 and the outgoing high-voltage connector 500 and the outside. The bottom of the high-voltage incoming line channel 250 is a tapered hole, which facilitates the installation and guidance of the high-voltage incoming and outgoing lines. The upper incoming line trough 230 includes a third routing groove 231 and a fourth groove 232. The upper end of the isolation sleeve 600 is provided in the fourth groove 232, which is a chamfered circular groove. A partition 260 is provided between the upper installation groove 220 and the fourth groove 232. The partition 260 extends downward from the top of the upper cavity and is used to separate the top terminal of the resistor 700 from the ground terminal of the pulse generator assembly 300 to prevent breakdown.

[0059] The side of the upper insulating shell 200 is provided with a heat dissipation inlet hole 270 and a heat dissipation outlet hole 280, which communicate with the fourth groove 232. The side of the lower insulating shell 100 is provided with a first heat dissipation hole 150, which communicates with the lower cavity. The top of the upper mounting groove 220 is provided with three through holes: one is a second heat dissipation hole 290 for the pulse generator assembly 300, the second is a mounting hole for the ground wire of the pulse generator assembly 300, and the third is a discharge channel for the pulse generator assembly 300.

[0060] Cooperate Figure 2 、 Figures 4 to 11 、 Figure 14 As shown, the working principle of the present invention is as follows:

[0061] The incoming high-voltage connector 4000-100KV high-voltage DC signal is connected to one end of the high-power resistor 700, and the other end of the high-power resistor 700 internally transfers the high-voltage DC signal to the input end of the pulse generator component 300. The pulse generator component 300 outputs a pulse width of 10-500ns and a 0-100KV high-voltage pulse output signal through the outgoing high-voltage connector 500.

[0062] The heat dissipation system of the present invention is divided into high-power resistor 700 heat dissipation and pulse generator heat dissipation, wherein,

[0063] The high-power resistor 700 is the main component that generates heat. The isolation sleeve 600 is set to form a relatively independent space around the resistor 700. Through the vents 610 on the isolation sleeve 600, the heat dissipation air inlet holes 270 and the heat dissipation air outlet holes 280 on the upper insulating shell 200, they are connected to an external dedicated heat dissipation vacuum pump to achieve high-efficiency heat dissipation of the resistor 700.

[0064] The internal switch of the pulse generator assembly 300 will generate a lot of heat when it breaks through the air to generate a pulse. A special heat dissipation air path is provided inside the pulse generator assembly 300. The air inlet channel enters from the first heat dissipation hole 150 on the side of the lower insulating shell 100, and is connected to the air pipe joint at the bottom of the pulse generator assembly 300 through the air pipe. The air outlet channel is connected from the heat dissipation outlet hole 280 at the upper end of the upper insulating shell 200 to the air pipe joint at the upper end of the pulse generator assembly 300, and then to the vacuum pump to realize heat dissipation of the pulse generator assembly 300.

[0065] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A low-temperature plasma high-voltage pulse generator device, characterized in that: It includes an insulating shell, a pulse generator assembly, an incoming high-voltage connector, an outgoing high-voltage connector, an isolation sleeve and a resistor. The insulating shell is provided with a mounting slot, an incoming slot and an outgoing slot. The mounting slot is located on one side of the incoming slot and the outgoing slot. The mounting slot, the incoming slot and the outgoing slot are separated from each other. The pulse generator assembly is arranged in the mounting slot. One end of the incoming slot and the outgoing slot is respectively provided with the incoming high-voltage connector and the outgoing high-voltage connector. The high-voltage connector is a column processed from a copper rod. The other end of the incoming slot is provided with the isolation sleeve. The resistor is arranged in the isolation sleeve. The insulating shell includes a lower insulating shell and an upper insulating shell that are nested together. The lower insulating shell has a lower cavity with an opening facing upward, and a lower mounting groove, a lower wire inlet groove, and a lower wire outlet groove are provided in the lower cavity. The upper insulating shell has an upper cavity with an opening facing downward, and an upper mounting groove, an upper wire inlet groove, and an upper wire outlet groove are provided in the upper cavity. The lower mounting groove and the upper mounting groove constitute the mounting groove, and the lower wire inlet groove and the upper wire inlet groove are nested together to form the wire inlet groove, and the lower wire outlet groove and the upper wire outlet groove are nested together to form the wire outlet groove; The lower wire inlet groove includes a first wiring groove, a first groove and a second groove. The first groove and the second groove are respectively provided on the left and right sides of the first wiring groove. The lower end of the isolation sleeve is provided in the first groove, and the incoming wire high-voltage connector is provided in the second groove. The lower wire outlet groove includes a second wiring groove and a third groove. The third groove is provided on the right side of the second wiring groove, and the outgoing wire high-voltage connector is provided in the third groove.

2. A low-temperature plasma high-voltage pulse generator device according to claim 1, characterized in that: The height of the lower inlet trough is higher than that of the lower outlet trough, and the height of the upper inlet trough is lower than that of the upper outlet trough. The inlet high-voltage connector and the outlet high-voltage connector are respectively arranged in the lower inlet trough and the lower outlet trough.

3. The low-temperature plasma high-voltage pulse generator device according to claim 2, characterized in that: The first groove is a chamfered circular groove, a placement groove is provided at the bottom of the first groove, the resistor is installed in the placement groove, the cross-sectional shape of the isolation sleeve is adapted to the first groove, and a vent is provided on the isolation sleeve.

4. A low-temperature plasma high-voltage pulse generator device according to claim 3, characterized in that: The top of the lower wire inlet trough is protruded to form a first flange, which is nested with the upper wire inlet trough. The top of the lower wire outlet trough is protruded to form a second flange, which is nested with the upper wire outlet trough.

5. The low-temperature plasma high-voltage pulse generator device according to claim 4, characterized in that: The lower insulating shell and the upper insulating shell are formed by injection molding. The inner wall of the lower insulating shell is provided with a first step portion, and the outer wall of the upper insulating shell is provided with a second step portion. The first step portion and the second step portion are nested and matched.

6. The low-temperature plasma high-voltage pulse generator device according to claim 5, characterized in that: A high-voltage line channel is provided in the upper line inlet groove and the upper line outlet groove. The upper line inlet groove includes a third wiring groove and a fourth groove. The upper end of the isolation sleeve is provided in the fourth groove. The fourth groove is a chamfered circular groove. A partition is provided between the upper mounting groove and the fourth groove. The partition is formed by extending downward from the top of the upper cavity.

7. The low-temperature plasma high-voltage pulse generator device according to claim 6, characterized in that: The side of the upper insulating shell is provided with a heat dissipation air inlet hole and a heat dissipation air outlet hole, and the heat dissipation air inlet hole and the heat dissipation air outlet hole are communicated with the fourth groove.

8. The low-temperature plasma high-voltage pulse generator device according to claim 7, characterized in that: A first heat dissipation hole is provided on the side of the lower insulating shell, and the first heat dissipation hole is communicated with the lower cavity. A second heat dissipation hole is provided on the top of the upper mounting groove.

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