Heat dissipation type magnetic compression switch for plasma high voltage power supply and control method thereof

Abstract

The application relates to the technical field of plasma high-voltage power supplies, in particular to a heat-dissipation type magnetic compression switch for a plasma high-voltage power supply and a control method thereof. The heat-dissipation type magnetic compression switch comprises a casing, a switch body arranged in the casing, an inner air duct arranged in the casing and communicated with both sides of the casing, an outer air duct arranged between the inner wall and the outer wall of the casing and communicated with the inner air duct, a speed-adjusting fan having two modes of breeze and strong wind and used for air intake at the front end of the inner air duct, and an elastic unit. In the breeze mode, the elastic unit closes the front end connecting port of the inner air duct and the outer air duct, so that the casing interior is only cooled through the inner air duct when the heat accumulation is not serious. In the strong wind mode, the elastic unit is separated from the front end connecting port of the inner air duct and the outer air duct, so that the casing interior is acceleratedly cooled through the inner air duct and the outer air duct when the heat accumulation is serious. The application can automatically adopt the corresponding cooling mode to rapidly cool the switch body according to the heat accumulation degree.

Description

Technical Field

[0001] This application relates to the technical field of plasma high-voltage power supplies, and in particular to a heat-dissipating magnetic compression switch for plasma high-voltage power supplies and a control method thereof. Background Technology

[0002] A plasma high-voltage power supply is a high-voltage power supply system specifically designed to generate pulsed corona plasma. It is mainly used in the fields of resource and environmental technology (such as pollutant degradation and waste gas treatment). Its core function is to convert electrical energy into high-voltage pulses to excite stable plasma discharge.

[0003] Magnetic compression switching is a high-power pulse switching technology that uses a magnetic field to compress plasma or conductive fluid to achieve rapid switching of current. It is mainly used in pulse power systems, controlled nuclear fusion, electromagnetic transmitters and other fields.

[0004] A search revealed Chinese Patent Publication No. CN210725454U, which discloses a pulsed corona plasma high-voltage power supply. The power supply includes a high-voltage pulse power supply section and a multi-stage magnetic compression device. The high-voltage pulse power supply section comprises a charger, a high-voltage energy storage capacitor, a series RSD switch, a magnetic saturation switch, and a pulse transformer, all connected in series to form a circuit. The charger is connected in parallel with the high-voltage energy storage capacitor to charge it. The multi-stage magnetic compression device is connected to the pulse transformer, and its output terminal serves as the output terminal of the pulsed corona plasma high-voltage power supply. This patent eliminates the dynamic power consumption during RSD activation and improves the reliability of the series RSD switch under high repetition frequency and high current operating conditions.

[0005] The aforementioned technologies have the following drawbacks: Under high-frequency and high-current operating conditions, the thermal accumulation of the magnetic compression switching unit is severe, leading to excessive local temperature rise and potentially causing magnetic saturation drift during continuous operation; when the thermal accumulation of the switching unit is severe, air cooling through a single air duct cannot effectively and quickly cool the switching unit, thus requiring improvement. Summary of the Invention

[0006] In order to automatically adopt the corresponding heat dissipation method to quickly cool down the switch body according to the degree of heat accumulation, this application provides a heat-dissipating magnetic compression switch for plasma high-voltage power supply and its control method.

[0007] In a first aspect, the heat-dissipating magnetic compression switch for plasma high-voltage power supplies provided in this application adopts the following technical solution: the heat-dissipating magnetic compression switch for plasma high-voltage power supplies includes a housing, a switch body is disposed inside the housing, and further includes:

[0008] The internal air duct is located inside the casing and connects the inside and outside sides of the casing;

[0009] The external air duct is located between the inner and outer walls of the casing and connects to the internal air duct.

[0010] The variable speed fan has two modes: gentle breeze and strong breeze, and is used to draw air into the front end of the internal air duct.

[0011] The elastic unit is closed at the front end of the connection between the inner and outer air ducts in the light wind mode, and detached from the front end of the connection between the inner and outer air ducts in the strong wind mode, so that the speed-regulating fan can draw air into the outer air duct through the inner air duct.

[0012] Optional, also includes:

[0013] Several heat dissipation fins are rotatably connected to the casing and can rotate to fit or detach from the outer wall of the casing.

[0014] The rotating unit is used to drive the heat dissipation fins to rotate.

[0015] Optionally, the variable speed fan also has a high-speed mode, in which the rotating unit can be blown by the variable speed fan in high-speed mode to cause the heat dissipation fins to rotate and detach from the outer wall of the casing.

[0016] Optional, also includes:

[0017] A temperature sensor, located inside the housing, is used to detect the temperature inside the housing;

[0018] The controller, temperature sensor, and speed-regulating fan are all coupled to the controller;

[0019] When the temperature value detected by the temperature sensor is greater than the first threshold and less than the second threshold, the temperature sensor will send a first-level heat dissipation signal to the controller, and the controller will control the speed-regulating fan to run in a low-wind mode.

[0020] When the temperature value detected by the temperature sensor is greater than the second threshold and less than the third threshold, the temperature sensor will send a secondary heat dissipation signal to the controller, and the controller will control the speed-regulating fan to run in high-speed mode.

[0021] When the temperature value detected by the temperature sensor is greater than the third threshold, the temperature sensor will send a three-level heat dissipation signal to the controller, and the controller will control the speed-regulating fan to run in high-speed mode.

[0022] Optionally, the internal air duct includes:

[0023] The front duct connects to the front end of the external air duct;

[0024] The rear duct connects to the rear end of the external air duct;

[0025] Several branch ducts surround the switch body and connect to the front and rear ducts.

[0026] Optionally, the middle part of the branch duct is connected to the external air duct through an extension pipe, so that the front duct can draw air into the external air duct through the branch duct and the extension pipe in the low wind mode.

[0027] Optionally, the external air duct includes:

[0028] The front air chamber is connected to the front air duct and is located at the front end of the switch body;

[0029] The rear air chamber is connected to the rear air duct and is located at the rear end of the switch body;

[0030] The central air chamber connects to the front air chamber and the rear air chamber and surrounds the switch body.

[0031] Optionally, the rotating unit includes:

[0032] The heat dissipation fins are rotatably connected to the casing via a hinge.

[0033] The extension plate is located inside the external air duct and is connected to the heat dissipation fins via a pivot. The extension plate can rotate in high-speed mode to cause the heat dissipation fins to rotate and detach from the outer wall of the casing.

[0034] The elastic strip is located on the heat dissipation fins. When the elastic strip is in its natural state, it is located on the left and right sides of the rotating shaft and fits against the outer wall of the casing.

[0035] Secondly, the control method for a heat-dissipating magnetic compression switch for a plasma high-voltage power supply provided in this application includes the following steps:

[0036] S1. Temperature Detection and Feedback: The temperature sensor detects the internal temperature of the housing and feeds it back to the controller;

[0037] S2, Gentle Breeze Mode: When the temperature value detected by the temperature sensor is greater than the first threshold and less than the second threshold, the controller will control the speed-regulating fan to run in gentle breeze mode, and the outside air will dissipate heat and cool the inside of the casing through the internal air duct and heat dissipation fins.

[0038] S3, High Wind Mode: When the temperature value detected by the temperature sensor is greater than the second threshold and less than the third threshold, the controller will control the speed-regulating fan to run in high wind mode. External air will dissipate heat and cool the inside of the casing through the internal air duct, external air duct and heat dissipation fins.

[0039] S4, High-speed mode: When the temperature value detected by the temperature sensor is greater than the third threshold, the controller will control the speed-regulating fan to run in high-speed mode. The external air will dissipate heat and cool the inside of the casing through the internal air duct, the external air duct and the unfolded heat dissipation fins.

[0040] S5, No-wind mode: When the temperature value detected by the temperature sensor is less than the first threshold, the controller will control the speed-regulating fan to turn off.

[0041] In summary, this application includes the following beneficial technical effects:

[0042] This application optimizes energy consumption and maintenance costs while ensuring heat dissipation efficiency through a multi-level temperature control strategy and adaptive airflow switching, and is especially suitable for the variable operating conditions of plasma high-voltage power supplies.

[0043] When the temperature value detected by the temperature sensor is greater than the first threshold and less than the second threshold, the controller will control the speed-regulating fan to operate in a low-wind mode. The air in the inner air duct will exchange heat with the inside of the mounting housing through the inner air duct, and the air in the rear half of the outer air duct will exchange heat with the inside of the mounting housing through the mounting housing. The air in the rear half of the outer air duct will also exchange heat with the outside air through the extension plate, the rotating shaft, and the heat dissipation fins. The inner air duct, the rear half of the outer air duct, and the heat dissipation fins work together to ensure the heat dissipation and cooling effect on the switch body.

[0044] When the temperature value detected by the temperature sensor is greater than the second threshold and less than the third threshold, the controller will control the speed-regulating fan to run in high-speed mode. Some of the external air blown onto the sliding sleeve will enter the external air duct. The external air in the external air duct can exchange heat with the inside of the mounting shell through the mounting shell. The external air duct, the internal air duct and the heat dissipation fins work together to ensure the heat dissipation and cooling effect on the switch body.

[0045] When the temperature value detected by the temperature sensor exceeds the third threshold, the controller will control the speed-regulating fan to operate in high-speed mode. The external air in the external air duct will blow the extension plate backward, causing the heat dissipation fins to rotate and detach from the outer wall of the mounting housing. This increases the contact area between the heat dissipation fins and the external air, thereby improving the heat dissipation effect of the heat dissipation fins. The external air duct, the internal air duct, and the unfolded heat dissipation fins work together to ensure the heat dissipation and cooling effect on the switch body. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the structure of the magnetic compression switch according to an embodiment of this application;

[0047] Figure 2 This is a cross-sectional view of the magnetic compression switch according to an embodiment of this application;

[0048] Figure 3 This is a schematic diagram of the internal structure of the mounting shell according to an embodiment of this application;

[0049] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle;

[0050] Figure 5 yes Figure 3 A magnified view of a portion of point B in the middle;

[0051] Figure 6This is a cross-sectional view of the mounting shell according to an embodiment of this application;

[0052] Figure 7 yes Figure 6 A magnified view of a portion of point C in the middle;

[0053] Figure 8 This is a cross-sectional structural diagram of the mounting shell and rotating unit according to an embodiment of this application;

[0054] Figure 9 This is a cross-sectional structural schematic diagram of the external air duct and rotating unit in an embodiment of this application;

[0055] Figure 10 yes Figure 9 A magnified view of a portion of point D in the middle;

[0056] Figure 11 This is a flowchart of the control method according to an embodiment of this application.

[0057] Reference numerals: 1. Housing; 11. Extension housing; 12. Mounting housing; 121. Slot; 122. Front housing; 123. Rear housing; 124. Bolt connection pair; 125. Connecting piece; 126. Mounting groove; 13. Heat dissipation fin; 2. Variable speed fan; 3. Air concentrator; 4. Switch body; 5. Internal air duct; 51. Front air duct; 511. Fixed front duct; 512. Sliding front duct; 513. First nut; 52. Branch air duct 53. Rear air duct; 531. Fixed rear air duct; 532. Sliding rear air duct; 533. Second nut; 54. Pin; 55. Extension tube; 6. External air duct; 61. Front air chamber; 62. Middle air chamber; 63. Rear air chamber; 7. Elastic unit; 71. Sliding sleeve; 72. Spring; 73. Through hole; 8. Rotating unit; 81. Rotating shaft; 82. Extension plate; 83. Elastic strip; 9. Controller; 91. Temperature sensor. Detailed Implementation

[0058] The following combination Figures 1-11 This application will be described in further detail.

[0059] This application discloses a heat-dissipating magnetic compression switch for use in plasma high-voltage power supplies. For example... Figure 1 As shown, a heat-dissipating magnetic compression switch for a plasma high-voltage power supply includes a housing 1. The housing 1 includes an extension shell 11 and a mounting shell 12 connected to each other. The extension shell 11 is located at the front end of the mounting shell 12.

[0060] like Figure 2 As shown, the mounting housing 12 contains a speed-regulating fan 2 and a wind-concentrating hood 3 arranged sequentially from front to back. The speed-regulating fan 2 has three operating modes: a gentle breeze mode, a strong breeze mode, and a gust of wind mode. The opening area of ​​the wind-concentrating hood 3 gradually decreases from front to back, so that the wind-concentrating hood 3 can concentrate the air blown out by the speed-regulating fan 2.

[0061] The switch body 4 and the inner air duct 5 are installed inside the mounting housing 12. The front end of the inner air duct 5 is connected to the rear opening of the air concentrator 3. During the operation of the speed-regulating fan 2, the speed-regulating fan 2 blows outside air into the air concentrator 3. After being gathered by the air concentrator 3, the outside air enters the inner air duct 5. During the flow of the outside air in the inner air duct 5, it exchanges heat with the inside of the housing 1, thereby achieving heat dissipation and cooling of the inside of the housing 1.

[0062] like Figure 2 and Figure 3 As shown, the internal air duct 5 includes a front air duct 51, a rear air duct 53, and several branch air ducts 52. The front air duct 51 is connected to the rear opening of the air shroud 3, the rear air duct 53 is connected to the outside of the mounting housing 12, and the branch air ducts 52 are connected to the rear end of the front air duct 51 and the front end of the rear air duct 53. When the speed-regulating fan 2 blows outside air into the air shroud 3, the outside air in the air shroud 3 will enter each branch air duct 52 through the front air duct 51, and the outside air in each branch air duct 52 will be gathered through the rear air duct 53 and discharged to the outside of the mounting housing 12. The arrangement of multiple branch air ducts 52, and the fact that multiple branch air ducts 52 surround the switch body 4, allows the outside air in the internal air duct 5 to comprehensively cool the inside of the housing 1, improving the heat dissipation and cooling effect on the switch body 4.

[0063] It is worth noting that the front end of the extended shell 11 can be extended and a dust filter can be installed inside it. The dust filter is set on the front side of the speed-regulating fan 2. The dust filter can filter impurities in the outside air to minimize the amount of external impurities entering the inner air duct 5, thereby reducing the cleaning frequency of the inner air duct 5.

[0064] The front duct 51 and the rear duct 53 are rigid pipes to ensure the stability of the inner duct 5 after installation; the branch duct 52 is a flexible pipe, and the middle part of the branch duct 52 is located on the edge of the inner side of the mounting shell 12, so that the branch duct 52 does not easily affect the installation of the switch body 4 inside the mounting shell 12.

[0065] like Figure 3 As shown, a pin 54 is provided in the middle of the branch duct 52. The pin 54 is U-shaped and the middle of the branch duct 52 is embedded in the U-shaped opening of the pin 54. The inner wall of the mounting shell 12 is provided with a slot 121, which corresponds to the pin 54 one by one. Both ends of the pin 54 can be inserted into the slot 121, so that the middle of the branch duct 52 is pressed against the inner wall of the mounting shell 12 to ensure the stability of the branch duct 52 inside the mounting shell 12.

[0066] like Figure 1 and Figure 2As shown, the mounting housing 12 includes a front housing 122 and a rear housing 123. The front housing 122 and the rear housing 123 can be joined together and connected by multiple bolt connections 124 to facilitate the disassembly and assembly of the mounting housing 12, thereby facilitating the disassembly, assembly and maintenance of the switch body 4.

[0067] like Figures 2 to 4 As shown, the front air duct 51 includes a fixed front duct 511 and a sliding front duct 512 arranged coaxially. The fixed front duct 511 is installed at the front end of the mounting shell 12 and connected to the rear opening of the air duct 3. The sliding front duct 512 is connected to all branch air ducts 52.

[0068] An external air duct 6 is provided between the inner wall and the outer wall of the mounting housing 12. The external air duct 6 includes a front air cavity 61, a middle air cavity 62 and a rear air cavity 63 connected in sequence. The front air cavity 61 is connected to the fixed front pipe 511 and the rear air cavity 63 is connected to the rear air pipe 53.

[0069] The fixed front tube 511 is provided with an elastic unit 7, which includes a sliding sleeve 71. The sliding sleeve 71 is slidably embedded in the fixed front tube 511 along the axial direction of the fixed front tube 511, and the sliding sleeve 71 is connected to the fixed front tube 511 by a spring 72. One end of the spring 72 is fixedly connected to the sliding sleeve 71, and the other end of the spring 72 is fixedly connected to the fixed front tube 511. The sliding front tube 512 is provided on the sliding sleeve 71.

[0070] When the heat accumulation inside the housing 12 is not severe, the speed-regulating fan 2 only needs to run in low wind mode. The spring 72 will be in its natural state, and the sliding sleeve 71 will be closed at the connection between the front air chamber 61 and the fixed front pipe 511. The air blown out by the speed-regulating fan 2 can only dissipate heat and cool the inside of the housing 1 through the inner air duct 5. This not only achieves heat dissipation and cooling of the inside of the housing 1, but also avoids external impurities from entering the outer air duct 6 as much as possible, reducing the cleaning frequency of the outer air duct 6.

[0071] When the heat accumulation inside the mounting housing 12 is severe, the speed-regulating fan 2 needs to operate in high-speed mode. The air force of the speed-regulating fan 2 will increase, the air speed inside the fixed front tube 511 will increase, the spring 72 will deform, and the sliding sleeve 71 will move backward and disengage from the connection between the front air cavity 61 and the fixed front tube 511. Some of the external air blown onto the sliding sleeve 71 will enter the external air duct 6. The external air in the external air duct 6 can exchange heat with the inside of the mounting housing 12 through the mounting housing 12. The external air duct 6 and the internal air duct 5 cooperate with each other to improve the heat dissipation and cooling effect on the switch body 4.

[0072] It is worth noting that the sliding sleeve 71 is provided with a through hole 73, and the sliding front tube 512 slides through the through hole 73. The sliding front tube 512 is threaded with two first nuts 513, and the two first nuts 513 are clamped together on the sliding sleeve 71 so as to facilitate the installation and removal of the sliding front tube 512 on the sliding sleeve 71.

[0073] like Figure 3 and Figure 5 As shown, the rear air duct 53 includes a fixed rear duct 531 and a sliding rear duct 532 arranged coaxially. The fixed rear duct 531 is installed at the rear end of the mounting housing 12 and connected to the rear air cavity 63. The sliding rear duct 532 is connected to all branch air ducts 52 and slides through the rear end of the mounting housing 12. Two second nuts 533 are threaded on the sliding rear duct 532. The two second nuts 533 are clamped together at the rear end of the mounting housing 12 to facilitate the installation and removal of the sliding rear end on the mounting housing 12.

[0074] It is worth noting that, such as Figure 2 As shown, the front air chamber 61 is located at the front end of the switch body 4, the rear air chamber 63 is located at the rear end of the switch body 4, and the middle air chamber 62 surrounds the switch body 4, so that the external air in the external air duct 6 can comprehensively cool the inside of the casing 1, thereby further improving the heat dissipation and cooling effect of the switch body 4.

[0075] like Figure 6 As shown, the inner and outer walls of the stroke cavity 62 are connected by several connecting pieces 125 to ensure the overall strength of the mounting shell 12.

[0076] like Figure 6 and Figure 7 As shown, the middle part of the branch duct 52 is connected to the extension pipe 55. The extension pipe 55 slides through the inner wall of the mounting housing 12, which not only improves the stability of the branch duct 52 in the mounting housing 12, but also allows the branch duct 52 to be connected to the central air chamber 62 through the extension pipe 55. The external air in the branch duct 52 can enter the external air duct 6 through the extension pipe 55. That is, in the low wind mode, the rear ends of the internal air duct 5 and the external air duct 6 can cooperate to dissipate heat and cool down the inside of the housing 1, thereby improving the heat dissipation and cooling effect on the switch body 4.

[0077] like Figure 1 As shown, several heat dissipation fins 13 are provided on the outer walls of the mounting shell 12. The heat dissipation fins 13 are made of thermally conductive material. The mounting shell 12 can exchange heat with the outside air through the heat dissipation fins 13, thereby improving the heat dissipation and cooling effect of the switch body 4.

[0078] like Figures 8 to 10As shown, a rotating unit 8 is provided on the heat dissipation fin 13. The rotating unit 8 includes a rotating shaft 81. The heat dissipation fin 13 is rotatably connected to the housing 1 via the rotating shaft 81. An extension plate 82 is mounted on the rotating shaft 81. The extension plate 82 is located inside the external air duct 6 and is connected to the heat dissipation fin 13 via the rotating shaft 81. The external air inside the external air duct 6 can exchange heat with the external air through the extension plate 82, the rotating shaft 81, and the heat dissipation fin 13, thereby improving the heat dissipation and cooling effect on the switch body 4.

[0079] The heat dissipation fin 13 is equipped with an elastic strip 83. When the speed-regulating fan 2 is running in a gentle or strong wind mode, the elastic strip 83 will be in a natural state. The elastic strip 83 and the heat dissipation fin 13 are respectively located on the left and right sides of the rotating shaft 81 and are attached to the outer wall of the casing 1, thereby minimizing the area of ​​the heat dissipation fin 13 exposed to the air, reducing the adhesion of impurities on the heat dissipation fin 13, and reducing the cleaning frequency of the heat dissipation fin 13.

[0080] When the heat accumulation inside the mounting housing 12 becomes too severe, requiring the speed-regulating fan 2 to operate in high-speed mode, the airflow of the speed-regulating fan 2 will increase further, the airflow speed in the external air duct 6 will accelerate, and the external air in the external air duct 6 will blow the extension plate 82 backward, causing the elastic strip 83 to deform. The heat dissipation fin 13 will rotate and detach from the outer wall of the mounting housing 12, thereby increasing the contact area between the heat dissipation fin 13 and the external air, thus improving the heat dissipation effect of the heat dissipation fin 13, and further improving the heat dissipation and cooling effect on the switch body 4.

[0081] It is worth noting that the outer wall of the mounting housing 12 is provided with several mounting grooves 126, which are connected to the central air chamber 62. The rotating shaft 81 is made of elastic material and can be directly inserted into the mounting groove 126 so that the rotating unit 8 can be quickly installed and removed from the mounting housing 12.

[0082] like Figure 2 As shown, a temperature sensor 91 is installed inside the mounting housing 12, and a controller 9 is installed on the outer wall of the extension housing 11. The temperature sensor 91 and the speed-regulating fan 2 are both coupled to the controller 9.

[0083] The implementation principle of the heat-dissipating magnetic compression switch for plasma high-voltage power supply in this application embodiment is as follows: When the temperature value detected by the temperature sensor 91 is greater than the first threshold and less than the second threshold, it indicates that the heat accumulation inside the mounting housing 12 is not serious. At this time, the temperature sensor 91 will send a first-level heat dissipation signal to the controller 9, and the controller 9 will control the speed-regulating fan 2 to operate in a low-wind mode. The air blown out by the speed-regulating fan 2 will enter the inner air duct 5 through the air condenser 3. Some of the air in the inner air duct 5 will enter the rear half of the outer air duct 6 through the extension pipe 55. The air inside the inner air duct 5 and the air in the rear half of the outer air duct 6 will be discharged to the outside of the mounting housing 12 through the fixed rear pipe 531. During the above heat dissipation process, the air in the inner air duct 5 will exchange heat with the inside of the mounting housing 12 through the inner air duct 5, and the air in the rear half of the outer air duct 6 will exchange heat with the inside of the mounting housing 12 through the mounting housing 12. The air in the rear half of the outer air duct 6 will also exchange heat with the outside air through the extension plate 82, the rotating shaft 81 and the heat dissipation fins 13. The inner air duct 5, the rear half of the outer air duct 6 and the heat dissipation fins 13 work together to ensure the heat dissipation and cooling effect on the switch body 4.

[0084] When the temperature value detected by the temperature sensor 91 is greater than the second threshold and less than the third threshold, it indicates that the heat accumulation inside the mounting housing 12 is relatively serious. At this time, the temperature sensor 91 will send a secondary heat dissipation signal to the controller 9. The controller 9 will control the speed-regulating fan 2 to operate in a strong wind mode. The wind force of the speed-regulating fan 2 will increase, the wind speed inside the fixed front tube 511 will increase, the sliding sleeve 71 will move to the rear and disengage from the connection between the front air cavity 61 and the fixed front tube 511, and some of the external air blown onto the sliding sleeve 71 will enter the external air duct 6. The external air in the external air duct 6 can exchange heat with the inside of the mounting housing 12 through the mounting housing 12. The external air duct 6, the internal air duct 5 and the heat dissipation fins 13 work together to ensure the heat dissipation and cooling effect on the switch body 4.

[0085] When the temperature value detected by the temperature sensor 91 exceeds the third threshold, it indicates that the heat accumulation inside the mounting housing 12 is too severe. At this time, the temperature sensor 91 will send a three-level heat dissipation signal to the controller 9. The controller 9 will control the speed-regulating fan 2 to operate in high-speed mode. The air force of the speed-regulating fan 2 will be further increased, and the air speed in the external air duct 6 will be accelerated. The external air in the external air duct 6 will blow the extension plate 82 backward and flip it. The heat dissipation fin 13 will rotate and detach from the outer wall of the mounting housing 12, so that the contact area between the heat dissipation fin 13 and the external air increases, thereby improving the heat dissipation effect of the heat dissipation fin 13. The external air duct 6, the internal air duct 5 and the unfolded heat dissipation fin 13 work together to ensure the heat dissipation and cooling effect of the switch body 4.

[0086] When the temperature value detected by the temperature sensor 91 is less than the first threshold, it means that the heat accumulation inside the mounting housing 12 is close to zero. At this time, the temperature sensor 91 will send a stop signal to the controller 9, and the controller 9 will control the speed-regulating fan 2 to shut down in order to save energy and reduce the accumulation of impurities in the inner air duct 5 and the outer air duct 6.

[0087] In summary, this application can automatically adopt the corresponding heat dissipation method to quickly cool down the switch body 4 according to the heat accumulation inside the mounting shell 12, which not only ensures the heat dissipation and cooling effect of the switch body 4, but also saves energy and reduces the cleaning frequency of the inner air duct 5, the outer air duct 6 and the heat dissipation fins 13.

[0088] This embodiment also discloses a control method for a heat-dissipating magnetic compression switch used in a plasma high-voltage power supply. For example... Figure 11 As shown, the control method for a heat-dissipating magnetic compression switch used in a plasma high-voltage power supply includes the following steps:

[0089] S1. Temperature detection and feedback: The magnetic compression switch operates continuously in the plasma exhaust gas treatment equipment. Its heat accumulation level changes dynamically with the working current and frequency. The temperature sensor 91 monitors the internal temperature of the mounting shell 12 in real time and feeds it back to the controller 9. The controller 9 dynamically adjusts the heat dissipation strategy according to the temperature threshold.

[0090] S2, Gentle Breeze Mode: When the temperature value detected by the temperature sensor 91 is greater than the first threshold (50℃) and less than the second threshold (70℃), the controller 9 will control the speed-regulating fan 2 to operate in gentle breeze mode. At this time, the output power of the speed-regulating fan 2 is 30%, the wind speed is 2m / s, and the external air will dissipate heat and cool the inside of the mounting shell 12 through the inner air duct 5, the rear half of the outer air duct 6 and the heat dissipation fins 13.

[0091] Specifically, in step S2, the elastic unit 7 will remain in a closed state, that is, the elastic unit 7 will be closed at the connection port between the fixed front tube 511 and the front air cavity 61.

[0092] The breeze mode has two airflow paths:

[0093] 1. Main path: speed-regulating fan 2 → air-concentrating hood 3 → inner air duct 5 → exterior of mounting housing 12;

[0094] 2. Auxiliary path: speed-regulating fan 2 → air-concentrating hood 3 → inner air duct 5 → extension pipe 55 → rear half of outer air duct 6 → outside of mounting shell 12.

[0095] The breeze mode has a triple heat dissipation mechanism:

[0096] 1. The internal air duct 5 directly cools the switch body 4;

[0097] 2. The rear half of the external air duct 6 dissipates heat through the wall of the mounting shell 12;

[0098] 3. Heat dissipation fins 13 passively conduct heat (in contact state).

[0099] S3, High Wind Mode: When the temperature value detected by the temperature sensor 91 is greater than the second threshold (70℃) and less than the third threshold (90℃), the controller 9 will control the speed-regulating fan 2 to operate in high wind mode. At this time, the output power of the speed-regulating fan 2 is 60%, the wind speed is 5m / s, and the external air will dissipate heat and cool the inside of the mounting shell 12 through the inner air duct 5, the outer air duct 6 and the heat dissipation fins 13.

[0100] Specifically, in step S3, the elastic unit 7 will be opened by wind pressure, that is, the elastic unit 7 will be disengaged from the connection port between the fixed front pipe 511 and the front air cavity 61.

[0101] The strong wind mode has three airflow paths:

[0102] 1. Main path: speed-regulating fan 2 → air-concentrating hood 3 → inner air duct 5 → exterior of mounting housing 12;

[0103] 2. Flow path: speed-regulating fan 2 → air-concentrating hood 3 → inner air duct 5 → front air cavity 61 → middle air cavity 62 → rear air cavity 63 → outside of mounting shell 12;

[0104] 3. Auxiliary path: speed-regulating fan 2 → wind concentrator hood 3 → inner air duct 5 → extension pipe 55 → rear half of outer air duct 6 → outside of mounting shell 12.

[0105] The high-speed mode has four heat dissipation mechanisms:

[0106] 1. Internal air duct 5 directly forces convection;

[0107] 2. External air duct 6 features a full-circumferential air curtain for heat dissipation;

[0108] 3. Enhance heat transfer on the wall surface of the casing 12;

[0109] 4. Heat dissipation fins 13 passively conduct heat (in contact state).

[0110] S4, High-speed mode: When the temperature value detected by the temperature sensor 91 is greater than the third threshold (90℃), the controller 9 will control the speed-regulating fan 2 to run in high-speed mode. At this time, the output power of the speed-regulating fan 2 is 100% and the wind speed is 8m / s. The external air will dissipate heat and cool the inside of the mounting shell 12 through the inner air duct 5, the outer air duct 6 and the unfolded heat dissipation fins 13.

[0111] Specifically, in step S4, the elastic unit 7 will be at its maximum opening, and the flow rate of the external air duct 6 will increase by 200%.

[0112] The Gale Mode features three airflow paths:

[0113] 1. Main path: speed-regulating fan 2 → air-concentrating hood 3 → inner air duct 5 → exterior of mounting housing 12;

[0114] 2. Enhanced path: speed-regulating fan 2 → wind concentrator shroud 3 → inner air duct 5 → front air cavity 61 → middle air cavity 62 (turbulence enhancement) → rear air cavity 63 → outside of mounting shell 12;

[0115] 3. Auxiliary path: speed-regulating fan 2 → wind concentrator hood 3 → inner air duct 5 → extension pipe 55 → rear half of outer air duct 6 → outside of mounting shell 12.

[0116] The Gale Mode features four heat dissipation mechanisms:

[0117] 1. Internal air duct 5: Turbulent forced convection;

[0118] 2. External air duct 6: Full casing coverage for heat dissipation;

[0119] 3. Install housing 12 with forced air cooling;

[0120] 4. Heat dissipation fins 13 actively deploy for heat dissipation.

[0121] When the temperature detected by temperature sensor 91 is less than the second threshold (70°C), controller 9 will control the speed-regulating fan 2 to urgently reduce to a low speed mode; when the temperature detected by temperature sensor 91 is greater than 110°C and lasts for 10 seconds, controller 9 will control the audible and visual alarm to sound an alarm.

[0122] S5, No-wind mode: When the temperature value detected by the temperature sensor 91 is less than the first threshold (50℃) and lasts for 5 minutes, the controller 9 will control the speed-regulating fan 2 to turn off.

[0123] In summary, this control method optimizes energy consumption and maintenance costs while ensuring heat dissipation efficiency through multi-level temperature control strategies and adaptive airflow switching, making it particularly suitable for the variable operating conditions of plasma high-voltage power supplies.

[0124] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A heat-dissipating magnetic compression switch for plasma high-voltage power supplies, comprising a housing, wherein a switch body is disposed within the housing, characterized in that: Also includes: The internal air duct is located inside the casing and connects the inside and outside sides of the casing; The external air duct is located between the inner and outer walls of the casing and connects to the internal air duct. The variable speed fan is used to draw air into the front end of the internal air duct. The variable speed fan has a gentle breeze mode, a strong breeze mode, and a high-speed breeze mode. The internal air duct includes a front air duct, branch air ducts, and a rear air duct; the front air duct includes a fixed front duct and a sliding front duct arranged coaxially, the fixed front duct is connected to the front end of the external air duct, and the sliding front duct is connected to all the branch air ducts; the rear air duct is connected to the rear end of the external air duct; several branch air ducts surround the switch body and connect the front air duct and the rear air duct, and the middle part of the branch air duct is connected to the external air duct through an extension pipe. The external air duct includes a front air chamber, a middle air chamber, and a rear air chamber; the front air chamber is connected to the front air duct and is located at the front end of the switch body, the rear air chamber is connected to the rear air duct and is located at the rear end of the switch body, and the middle air chamber is connected to the front air chamber and the rear air chamber and surrounds the switch body. Several heat dissipation fins are rotatably connected to the outer wall of the casing via a pivot. The rotating unit includes a rotating shaft, an extension plate, and an elastic strip. The extension plate is located inside the external air duct and is connected to the heat dissipation fins through the rotating shaft. The extension plate can be driven to rotate by the airflow in the high-speed mode to cause the heat dissipation fins to rotate and detach from the outer wall of the casing. The elastic strip is located on the heat dissipation fins. When the elastic strip is in its natural state, the elastic strip and the heat dissipation fins are located on the left and right sides of the rotating shaft and are attached to the outer wall of the casing. The elastic unit, which is set inside the fixed front tube, includes a sliding sleeve and a spring. The sliding sleeve is slidably embedded in the fixed front tube along the axial direction of the fixed front tube. The sliding sleeve is connected to the fixed front tube through the spring. One end of the spring is fixedly connected to the sliding sleeve and the other end is fixedly connected to the fixed front tube. The sliding front tube is set on the sliding sleeve. The sliding sleeve is used to close or open the connection port between the fixed front tube and the front air cavity. When the variable speed fan is running in a gentle breeze mode, the sliding sleeve closes the connection port under the action of the spring; when the variable speed fan is running in a strong wind mode, the sliding sleeve moves against the spring force under the action of wind pressure to open the connection port; when the variable speed fan is running in a high wind mode, the sliding sleeve opens the connection port, and the extension plate is driven to rotate by the airflow to drive the heat dissipation fins to rotate and detach from the outer wall of the casing.

2. The heat-dissipating magnetic compression switch for plasma high-voltage power supplies according to claim 1, characterized in that: Also includes: A temperature sensor, located inside the housing, is used to detect the temperature inside the housing; The controller, temperature sensor, and speed-regulating fan are all coupled to the controller; When the temperature value detected by the temperature sensor is greater than the first threshold and less than the second threshold, the temperature sensor will send a first-level heat dissipation signal to the controller, and the controller will control the speed-regulating fan to run in a low-wind mode. When the temperature value detected by the temperature sensor is greater than the second threshold and less than the third threshold, the temperature sensor will send a secondary heat dissipation signal to the controller, and the controller will control the speed-regulating fan to run in high-speed mode. When the temperature value detected by the temperature sensor is greater than the third threshold, the temperature sensor will send a three-level heat dissipation signal to the controller, and the controller will control the speed-regulating fan to run in high-speed mode.

3. The control method for a heat-dissipating magnetic compression switch for a plasma high-voltage power supply as described in claim 2, characterized in that: Includes the following steps: S1. Temperature Detection and Feedback: The temperature sensor detects the internal temperature of the housing and feeds it back to the controller; S2, Gentle Breeze Mode: When the temperature value detected by the temperature sensor is greater than the first threshold and less than the second threshold, the controller will control the speed-regulating fan to run in gentle breeze mode, and the outside air will dissipate heat and cool the inside of the casing through the internal air duct and heat dissipation fins. S3, High Wind Mode: When the temperature value detected by the temperature sensor is greater than the second threshold and less than the third threshold, the controller will control the speed-regulating fan to run in high wind mode. External air will dissipate heat and cool the inside of the casing through the internal air duct, external air duct and heat dissipation fins. S4, High-speed mode: When the temperature value detected by the temperature sensor is greater than the third threshold, the controller will control the speed-regulating fan to run in high-speed mode. The outside air will dissipate heat and cool the inside of the casing through the inner air duct, the outer air duct and the unfolded heat dissipation fins. S5, No-wind mode: When the temperature value detected by the temperature sensor is less than the first threshold, the controller will control the speed-regulating fan to turn off.

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