Explosion-proof direct-current high-voltage power supply device for combustible medium plasma ignition

Abstract

The utility model relates to an explosion-proof direct-current high-voltage power supply device for combustible medium plasma ignition, which comprises a direct-current high-voltage power supply which is electrically connected with a combustible medium plasma ignition generator and selectively supplies ignition electric energy, and the direct-current high-voltage power supply is arranged in an explosion-proof heat dissipation assembly. The explosion-proof heat dissipation assembly is used for constructing a multi-stage heat conduction heat dissipation structure consisting of a first-stage heat dissipation body, a second-stage heat dissipation body, a third-stage heat dissipation body and a first flow guide fan in a manner that heat generated by the direct-current high-voltage power supply during plasma ignition energy supply is subjected to heat conduction transfer and an explosion-proof accommodating cavity is formed; and a temperature and humidity regulation and control assembly for monitoring and regulating and controlling the temperature and humidity parameters of the direct-current high-voltage power supply in real time is also arranged on the secondary heat dissipation body of the anti-explosion heat dissipation assembly. According to the utility model, efficient heat dissipation of the power supply is realized through a three-stage heat dissipation mode, and temperature and humidity monitoring and regulation are carried out on the environment where the power supply is located, so that the long-time stable and reliable working capability of the power supply is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to metallurgical steel's diffusion torch, chemical industry and oil and natural gas ground construction's venting torch and oil and natural gas drilling's discharge gas (well killing discharge, blowout discharge, oil and gas test discharge) ignition technical field, especially relate to a kind of for combustible medium plasma ignition's explosion-proof direct-current high voltage power supply device. BACKGROUND

[0002] In the metallurgical steel production process, a large amount of waste gas will be generated in the metallurgical processing process, in order to reduce the pollution of waste gas to the environment and atmosphere, environmental protection treatment is usually needed. In addition, during the drilling of oil and natural gas, the operation processes of well killing, blowout, oil testing, etc. will produce flammable and toxic gases, which also need environmental protection treatment. Finally, in the oil and natural gas station (purification plant), during the production process, the gases discharged during the accident, equipment maintenance and production process also need environmental protection treatment. At present, the environmental protection treatment of the above-mentioned discharged gas is to burn the gas by burning, and then discharge the burned gas into the atmosphere, so as to reduce the pollution of direct discharge of gas and achieve the purpose of environmental protection.

[0003] With the development of ignition technology for controlling the combustion of discharged gas, plasma ignition is widely used due to its unique advantages of large ignition energy, spontaneous generation of high-temperature plasma with certain length, no need for auxiliary ignition fuel medium, strong self-cleaning ability, etc. However, the current plasma ignition technology still has the shortcomings of large heat output, short ignition time, high temperature state easy to cause ignition power damage, input AC voltage fluctuation easy to cause unreliable ignition, plasma ignition power limited by installation location easy to frost and condense and cause short circuit damage of electrical components and circuit. One of the fundamental reasons for the above defects is that the plasma ignition power involved in the plasma ignition technology has large heat output and cannot work for a long time, and the existing plasma ignition power is easy to frost and condense, causing circuit short circuit damage, thus easily leading to plasma ignition failure and causing serious safety hazards. Therefore, it is urgent to design a plasma ignition power that can work for a long time and is stable and reliable for the development of plasma ignition technology. SUMMARY

[0004] The utility model aims at providing a kind of switch power supply circuit for combustible medium plasma ignition's explosion-proof direct current high voltage power supply device using AC-DC-AC-DC topology structure and can realize power supply high-efficiency heat dissipation by three-stage heat dissipation mode, while the environment where power supply is located is controlled in temperature and humidity to improve the ability of power supply long-time stable and reliable work, to overcome the shortcomings of the current plasma ignition equipment, such as short ignition time, large heat generation, ignition power supply damage, unreliable ignition caused by input ac voltage fluctuation, plasma ignition power supply internal frost and dew easily cause short circuit damage ignition power supply, to realize the long-time reliable work of plasma ignition.

[0005] The utility model adopts technical scheme as follows: a kind of explosion-proof direct current high voltage power supply device for combustible medium plasma ignition, including direct current high voltage power supply with combustible medium plasma ignition generator electric connection and selectively supply ignition electric energy, the direct current high voltage power supply is installed in explosion-proof heat dissipation component, wherein, the explosion-proof heat dissipation component is built according to the heat generated by the direct current high voltage power supply when plasma ignition power supply is transferred by heat conduction and forms the way of explosion containment chamber by first heat sink, second heat sink, third heat sink, first flow fan is made into multistage heat conduction heat dissipation structure;In the second heat sink of the explosion-proof heat dissipation component, there is also humidity control component for real-time monitoring and control of the temperature and humidity parameters of the direct current high voltage power supply.

[0006] According to a preferred embodiment, the first heat sink is a heat-conducting copper plate for placing the direct current high voltage power supply and can be in contact with the direct current high voltage power supply for heat conduction, the second heat sink is a metal explosion-proof box body capable of defining an explosion containment chamber, and the third heat sink is a wing-shaped metal heat sink outside the second heat sink, wherein the first heat sink and the third heat sink are respectively installed on the same side of the second heat sink, and the outer side of the second heat sink is also provided with the first flow fan capable of guiding the flow of heat dissipation air to flow in the gap of the third heat sink composed of wing-shaped metal heat sink.

[0007] According to a preferred embodiment, the temperature and humidity control component includes a temperature and humidity controller unit, a temperature and humidity detection sensor unit, a heating module, a second flow fan and a flow guide cylinder, wherein the temperature and humidity controller unit is installed on the surface of the second heat sink formed by the metal explosion-proof box body, and the temperature and humidity controller unit is signal connected with the temperature and humidity detection sensor unit attached to the direct current high voltage power supply;The surface of the second heat sink away from the direct current high voltage power supply is also inserted with the flow guide cylinder, the second flow fan is installed on the inflow end of the outer side of the second heat sink, and the heating module is suspended in the flow guide cylinder.

[0008] According to a preferred embodiment, the direct current high voltage power supply is composed of AC-DC rectifier module, APFC power factor correction module, DC-AC inverter module, AC-AC high frequency voltage transformer and AC-DC high frequency rectifier module connected in series and controlled by a power supply control unit, so as to build an AC-DC-AC-DC topology circuit.

[0009] According to a preferred embodiment, the AC-DC rectifier module converts the external input alternating current into direct current voltage in a manner of building a rectifier bridge.

[0010] According to a preferred embodiment, the APFC power factor correction module makes the input current waveform in phase with the input voltage waveform by building a BOOST circuit structure to reduce the alternating current fluctuation.

[0011] According to a preferred embodiment, the DC-AC inverter module is connected with the APFC power factor correction module in a manner of inverting the direct current voltage output by the APFC power factor correction module into high frequency alternating current voltage by full-bridge inversion.

[0012] According to a preferred embodiment, the AC-AC high frequency voltage transformer is connected with the DC-AC inverter module in a manner of controllably boosting the high frequency alternating current voltage produced by the DC-AC inverter module to 2000V to 15000V high frequency alternating current voltage.

[0013] According to a preferred embodiment, the AC-DC high frequency rectifier module outputs direct current high voltage capable of long distance ignition power supply by full-bridge rectification or voltage doubling rectification.

[0014] The utility model discloses a direct current high voltage power supply device for plasma ignition has the advantages that:

[0015] The application adopts the switching power supply circuit of AC-DC-AC-DC topology structure, solves the problems of power supply heat and energy waste, meets the standard requirements of the country on harmonics, reduces the harm to the power grid, and solves the defects of unreliable ignition caused by the reduction of output direct current high voltage due to input alternating current power fluctuation.

[0016] The application adopts the three-stage heat dissipation heat conduction structure to efficiently transfer the heat of the direct current high voltage power supply, so that the temperature can be controlled within the normal working temperature range of all components of the direct current high voltage power supply, preventing the damage of the power supply device due to temperature rise, thereby ensuring the reliable work of the plasma ignition direct current high voltage power supply device.

[0017] The application solves the short circuit damage of the DC high-voltage power supply device caused by frost and dew due to temperature drop inside the DC high-voltage power supply device, ensures the long-term reliable work of the DC high-voltage power supply device for plasma ignition, and further improves the stability, durability and safety of the DC high-voltage power supply during ignition function through the mode of improving the working capacity of the DC high-voltage power supply for plasma ignition from three aspects, thereby ensuring the reliability of plasma ignition from the source of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a preferred structure schematic diagram of the explosion-proof DC high-voltage power supply device for combustible medium plasma ignition provided by the application;

[0019] Figure 2 is a preferred plane schematic diagram of the explosion-proof heat dissipation assembly of the explosion-proof DC high-voltage power supply device for combustible medium plasma ignition provided by the application;

[0020] Figure 3 is a preferred sectional view of the A-A place of the explosion-proof DC high-voltage power supply device for combustible medium plasma ignition provided by the application;

[0021] Figure 4 is a preferred component diagram of the DC high-voltage power supply of the explosion-proof DC high-voltage power supply device for combustible medium plasma ignition provided by the application.

[0022] LIST OF REFERENCE NUMERALS

[0023] 1: DC high-voltage power supply; 2: explosion-proof heat dissipation assembly; 3: temperature and humidity regulation assembly; 11: AC-DC rectifier module; 12: APFC power factor correction module; 13: DC-AC inverter module; 14: AC-AC high-frequency step-up transformer; 15: AC-DC high-frequency rectifier module; 16: power control unit; 21: primary heat sink; 22: secondary heat sink; 23: tertiary heat sink; 24: first flow guide fan; 31: temperature and humidity regulation assembly; 32: temperature and humidity detection sensor unit; 33: heating module; 34: second flow guide fan; 35: flow guide cylinder. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the application or the prior art, the application will be briefly introduced with reference to the drawings and the description of the embodiments or the prior art. Obviously, the following description of the drawings structure is only some embodiments of the application, and for those skilled in the art, other drawings can be obtained without creative labor on the premise of the drawings.

[0025] The technical solutions provided by the utility model will be described in detail below with reference to the drawings by way of examples. It should be noted that the descriptions of these examples are used to help understand the utility model, but do not constitute a limitation on the utility model. In some examples, some embodiments belong to existing or conventional technologies, and thus are not described or not described in detail.

[0026] In addition, the technical features described in the present document, or the steps in all the disclosed methods, can be combined in any suitable manner in one or more embodiments, except for mutually exclusive features and / or steps. It is easy for those skilled in the art to understand that the order of steps or operations of the methods related to the examples provided herein can also be changed. Any order in the drawings and examples is only used for illustration and does not imply that a certain order is required, unless it is explicitly stated that a certain order is required.

[0027] The serial numbers of components in the present document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application include direct and indirect connection (coupling) under reasonable circumstances (except for self-contradictory circumstances).

[0028] The following will be described in detail with reference to the drawings.

[0029] Example 1

[0030] The present application provides a kind of for combustible medium plasma ignition explosion-proof direct current high voltage power supply device, it includes direct current high voltage power supply 1, explosion-proof heat dissipation component 2 and temperature and humidity control component 3.

[0031] According to Figures 1-4In the shown specific embodiment, the direct current high voltage power supply 1 is electrically connected with the combustible medium plasma ignition generator to selectively supply ignition power, so that the combustible medium plasma ignition generator can be controlled to generate plasma ignition. The direct current high voltage power supply 1 is installed in the explosion-proof heat dissipation assembly 2 which can conductively transfer the heat generated when the plasma ignition power supply is energized and forms an explosion-proof accommodation chamber. The temperature and humidity control assembly 3 for real-time monitoring and regulating the temperature and humidity parameters of the direct current high voltage power supply 1 is also arranged on the secondary heat sink 22 of the explosion-proof heat dissipation assembly 2. The direct current high voltage power supply 1 adopts a switching power supply circuit with an AC-DC-AC-DC topology to improve the power factor of the power supply and reduce the heat generated by the power supply circuit itself. At the same time, the direct current high voltage power supply 1 is integrated as a whole and installed on the heat dissipation module. The explosion-proof heat dissipation assembly 2 adopts a three-stage heat dissipation method to achieve high-efficiency heat dissipation of the direct current high voltage power supply 1: the heat generating components (rectifier bridge stack, IGPT power device, transformer, rectification module) of the direct current high voltage power supply 1 are fixed on a copper plate with a certain area, the copper plate is installed on an explosion-proof box body made of alloy aluminum, and a wing-shaped metal radiator with a cooling fan is arranged on the outer wall surface of the explosion-proof box body. The three-stage heat dissipation method can control the temperature within the normal working temperature range of all components of the direct current high voltage power supply, ensuring reliable operation of the plasma ignition direct current high voltage power supply device. The temperature and humidity control assembly 3 can monitor the temperature and humidity inside the direct current high voltage power supply 1 in real time, so that when the ambient temperature of the direct current high voltage power supply 1 decreases to near the critical value of frosting and condensation, the temperature can be adjusted by delivering directional hot air flow to the surface of the direct current high voltage power supply 1, preventing short circuit damage due to frosting and condensation caused by temperature drop inside the plasma ignition direct current high voltage power supply device, and ensuring reliable operation of the plasma ignition direct current high voltage power supply device. In addition, the temperature and humidity control assembly 3 can also independently draw air flow to blow the surface of the direct current high voltage power supply 1 to accelerate the transfer of working heat in cooperation with the explosion-proof heat dissipation assembly 2, thereby improving the cooling efficiency. In addition, when the input alternating current voltage decreases, the power control unit 16 of the direct current high voltage power supply 1 adjusts the PWM duty cycle to increase the primary current of the high-frequency transformer, thereby ensuring that the amplitude of the high-frequency high-voltage output by the AC-DC high-frequency rectification module 15 remains unchanged, realizing stable output of the direct current high voltage, and preventing the defect of unreliable ignition caused by the decrease of the output direct current high voltage due to the fluctuation of the input alternating current power.

[0032] Preferably, the direct current high voltage power supply 1 comprises an AC-DC rectifier module 11, an APFC power factor correction module 12, a DC-AC inverter module 13, an AC-AC high frequency voltage transformer 14, an AC-DC high frequency rectifier module 15 and a power supply control unit 16. Further preferably, the AC-DC rectifier module 11, the APFC power factor correction module 12, the DC-AC inverter module 13, the AC-AC high frequency voltage transformer 14 and the AC-DC high frequency rectifier module 15 are connected in series and controlled by the power supply control unit 16 to form an AC-DC-AC-DC topology circuit.

[0033] Preferably, the AC-DC rectifier module 11 converts the 220V AC input into a direct current voltage of about 300V in the form of a rectifier bridge. Further preferably, the model of the AC-DC rectifier module 11 can be MW-LF-Rct-Mod.

[0034] Preferably, the APFC power factor correction module 12 reduces the AC fluctuation by building a BOOST circuit structure to make the input current and the input voltage waveform in phase, thereby reducing the circuit loss. Further preferably, the model of the APFC power factor correction module 12 can be MW-APFC-Mod.

[0035] Preferably, the DC-AC inverter module 13 converts the direct current voltage output by the APFC power factor correction module 12 into high frequency AC voltage through a power switch tube (IGBT) full-bridge inverter. Further preferably, the model of the DC-AC inverter module 13 can be MW-Ivt-Mod.

[0036] Preferably, the AC-AC high frequency voltage transformer 14 boosts the high frequency AC voltage produced by the DC-AC inverter module 13 to a high frequency AC voltage of 2000V to 15000V. Further preferably, the model of the AC-AC high frequency voltage transformer 14 can be MW-IHF-UP-TR.

[0037] Preferably, the AC-DC high frequency rectifier module 15 outputs direct current high voltage that can be used for long-distance ignition power supply through full-bridge rectification or voltage doubling rectification. Further preferably, the model of the AC-DC high frequency rectifier module 15 can be MW-HF-Rct-Mod.

[0038] Preferably, the power supply controller 16 uses FPGA (Field Programmable Gate Array) / CPLD (Programmable Logic Device) / Microcomputer (Microprocessor / Single Chip Microcomputer) as the controller of the power supply, to complete the sampling, control and protection of the AC-DC-DC-AC-DC topology circuit of the power supply. Further preferably, the power supply controller 16 is configured with an RS485 communication interface. Further preferably, the power supply controller 16 uses MODBUS-RTU communication protocol to complete data information exchange with the external control unit.

[0039] Preferably, the explosion-proof heat dissipation assembly 2 is built in a way that the heat generated by the direct current high-voltage power supply 1 when providing power for plasma ignition is transferred in a multi-stage heat conduction heat dissipation structure composed of a first heat sink 21, a second heat sink 22, a third heat sink 23, and a first air guide fan 24, and forms an explosion-proof containing chamber. Preferably, the first heat sink 21 is a heat-conducting copper plate for placing the direct current high-voltage power supply 1 and can conduct heat in contact with the direct current high-voltage power supply 1. Specifically, the first heat sink 21 is a metal plate body with high heat conduction performance, such as copper and aluminum materials, etc. Preferably, the second heat sink 22 is a metal explosion-proof box body capable of defining an explosion-proof containing chamber. Specifically, the second heat sink 22 is a box shell structure made of a metal material such as alloy aluminum material with high heat conduction and strong structural strength, so that it has high heat conduction capacity and facilitates heat dissipation while also having excellent explosion-proof capability. Preferably, the third heat sink 23 is a wing-shaped metal heat sink outside the second heat sink 22. Specifically, the wing-shaped metal heat sink constituting the third heat sink 23 can be directly prepared by referring to the existing heat dissipation fin material. Preferably, the first heat sink 21 and the third heat sink 23 are respectively installed on the inner and outer sides of the same box wall of the second heat sink 22, so that the heat of the direct current high-voltage power supply 1 installed on the first heat sink 21 is transferred to the first heat sink 21, the second heat sink 22, and the third heat sink 23 in sequence to realize three-stage heat dissipation and improve the surface area and heat dissipation efficiency of the heat dissipation cooling structure. Further preferably, the outer side of the second heat sink 22 is also provided with a first air guide fan 24 capable of guiding the flow of heat dissipation air to flow directionally in the gap of the third heat sink 23 composed of wing-shaped metal heat sinks, so that the first air guide fan 24 can accelerate the flow of gas on the surface of the third heat sink 23 and improve its heat dissipation capacity. Specifically, the first air guide fan 24 can be a direct current fan with a model of EC-CE-6025. Preferably, a gas guide through hole capable of exhausting and maintaining the balance of internal and external air pressure is arranged on the non-mounting surface of the second heat sink 22 forming the metal explosion-proof box body, so as to exhaust the air flow input into the box body by the second air guide fan 34. Specifically, the gas guide through hole can be constructed in a way of inclined hole or blocked by inclined plate to ensure the explosion-proof effect of the box body. By setting the multi-stage heat conduction heat dissipation structure, the temperature can be controlled within the normal working temperature range of all components of the direct current high-voltage power supply 1, and the reliability of the direct current high-voltage power supply 1 during plasma ignition is ensured.

[0040] Preferably, the temperature and humidity control assembly 3 comprises a temperature and humidity controller unit 31, a temperature and humidity detection sensor unit 32, a heating module 33, a second air guide fan 34 and an air guide cylinder 35. Preferably, the temperature and humidity controller unit 31 is installed on the surface of the secondary heat sink 22 forming the metal explosion-proof box. Preferably, the temperature and humidity controller unit 31 is signal connected with the temperature and humidity detection sensor unit 32 attached to the direct current high-voltage power supply 1. Further preferably, the information collection end of the temperature and humidity detection sensor unit 32 is inserted into the interior of the integrated direct current high-voltage power supply 1, so as to accurately monitor the parameters of the component containing space. Preferably, the temperature and humidity controller unit 31 can select a microprocessor of MW-RS-WS / 4G, so that it can receive the temperature and humidity parameters collected by the temperature and humidity detection sensor unit 32, and control the working state of the heating module 33 and the second air guide fan 34 according to the parameter changes. Preferably, the temperature and humidity detection sensor unit 32 can select a precision temperature and humidity detection sensor of model MW-UT-5521V to simultaneously collect temperature and humidity parameters. Preferably, the air guide cylinder 35 is also inserted on the surface of the secondary heat sink 22 away from the direct current high-voltage power supply 1. Further preferably, the second air guide fan 34 driven by the air flow directional input of the secondary heat sink 22 is installed at the inflow end of the air guide cylinder 35 outside the secondary heat sink 22, and the heating module 33 heating the air flow passing through the cylinder cavity is suspended in the air guide cylinder 35. Specifically, the second air guide fan 34 can work independently under the control of the temperature and humidity controller unit 31, so as to drive the cold air flow to blow the surface of the direct current high-voltage power supply 1 to improve the cooling effect, or the heating module 33 and the second air guide fan 34 can be driven to work synchronously to heat the surface of the direct current high-voltage power supply 1 by hot air flow. Preferably, the second air guide fan 34 can select a direct current fan of model EC-CE-8125B. Specifically, the temperature and humidity controller unit 31 monitors the temperature and humidity inside the direct current high-voltage power supply 1 for plasma ignition in real time, transmits the temperature and humidity data inside the direct current high-voltage power supply 1 for plasma ignition to the temperature and humidity detection sensor unit 32, and when the temperature detected by the temperature and humidity detection sensor unit 32 decreases to near the critical value of frost and dew, the heating module 33 and the second air guide fan 34 are started to increase the temperature inside the direct current high-voltage power supply 1 for plasma ignition, so as to prevent the direct current high-voltage power supply 1 for plasma ignition from being damaged by short circuit due to frost and dew caused by temperature drop, and ensure the reliable work of the direct current high-voltage power supply device for plasma ignition.

[0041] Preferably, the electric appliance element and the controller are electrically connected with the power supply, the control mode of the application is controlled by the controller, the control circuit of the controller can be realized by simple programming of those skilled in the art, the power supply also belongs to the common knowledge in the art, and the utility model is only used to protect the mechanical device and the mechanical structure features, so the utility model will not explain the control mode and the circuit connection in detail.

[0042] The utility model is not limited to the above optional implementation, anyone can draw other various forms of products under the enlightenment of the utility model, but no matter make any change in its shape or structure, any technical scheme falling into the scope defined by the claims of the utility model falls within the protection scope of the utility model. Those skilled in the art should understand that the utility model specification and its drawings are all illustrative and not constitute the limitation of the claims. The protection scope of the utility model is defined by the claims and its equivalents. In the full text, the features led by "preferably" are only optional ways and should not be understood as necessarily setting, so the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. An explosion-proof DC high-voltage power supply device for plasma ignition of combustible media, comprising a DC high-voltage power supply (1) electrically connected to a plasma ignition generator for combustible media and selectively supplying ignition power, characterized in that, The DC high voltage power supply (1) is installed in the explosion-proof heat dissipation assembly (2). The explosion-proof heat dissipation assembly (2) is constructed in a way that the heat generated by the DC high voltage power supply (1) during plasma ignition is transferred by heat conduction and forms an explosion-proof containment chamber. It consists of a multi-stage heat conduction heat dissipation structure composed of a primary heat sink (21), a secondary heat sink (22), a tertiary heat sink (23), and a first flow guide fan (24). A temperature and humidity control component (3) is also provided on the secondary heat sink (22) of the explosion-proof heat dissipation component (2) to monitor and control the temperature and humidity parameters of the DC high voltage power supply (1) in real time.

2. The explosion-proof DC high-voltage power supply device for plasma ignition of flammable media as described in claim 1, characterized in that, The primary heat sink (21) is a heat-conducting copper plate used to house the DC high-voltage power supply (1) and capable of contact-type heat conduction with the DC high-voltage power supply (1). The secondary heat sink (22) is a metal explosion-proof enclosure capable of defining an explosion-proof containment chamber. The tertiary heat sink (23) is a wing-shaped metal heat sink located outside the secondary heat sink (22). The primary heat sink (21) and the tertiary heat sink (23) are respectively installed on the inner and outer sides of the same box wall of the secondary heat sink (22), and the outer side of the secondary heat sink (22) is also provided with a first guide fan (24) that can guide the heat dissipation airflow to flow directionally in the gap between the plates of the tertiary heat sink (23) which is composed of airfoil metal heat sinks.

3. The explosion-proof DC high-voltage power supply device for plasma ignition of flammable media as described in claim 2, characterized in that, The temperature and humidity control component (3) includes a temperature and humidity controller unit (31), a temperature and humidity detection sensor unit (32), a heating module (33), a second airflow fan (34), and an airflow guide tube (35), wherein, The temperature and humidity controller unit (31) is installed on the surface of the secondary heat sink (22) forming the metal explosion-proof enclosure, and the temperature and humidity controller unit (31) is signal connected to the temperature and humidity detection sensor unit (32) attached to the DC high voltage power supply (1); The secondary heat sink (22) is further fitted with a flow guide tube (35) on its surface away from the DC high voltage power supply (1). The flow guide tube (35) is fitted with a second flow guide fan (34) at its inlet end, and the heating module (33) is suspended inside the flow guide tube (35).

4. The explosion-proof DC high-voltage power supply device for plasma ignition of flammable media as described in claim 3, characterized in that, The DC high voltage power supply (1) consists of an AC-DC rectifier module (11), an APFC power factor correction module (12), a DC-AC inverter module (13), an AC-AC high frequency step-up transformer (14), and an AC-DC high frequency rectifier module (15) connected in series and controlled by the power control unit (16) to construct an AC-DC-AC-DC topology circuit.

5. The explosion-proof DC high-voltage power supply device for plasma ignition of flammable media as described in claim 4, characterized in that, The AC-DC rectifier module (11) converts externally input AC power into DC voltage by constructing a rectifier bridge.

6. The explosion-proof DC high-voltage power supply device for plasma ignition of flammable media as described in claim 5, characterized in that, The APFC power factor correction module (12) reduces AC fluctuations by building a BOOST circuit structure, so that the input current and the input voltage waveform are in phase.

7. The explosion-proof DC high-voltage power supply device for plasma ignition of flammable media as described in claim 6, characterized in that, The DC-AC inverter module (13) is connected to the APFC power factor correction module (12) in such a way that it converts the DC voltage output by the APFC power factor correction module (12) into a high-frequency AC voltage.

8. The explosion-proof DC high-voltage power supply device for plasma ignition of flammable media as described in claim 7, characterized in that, The AC-AC high-frequency step-up transformer (14) is connected to the DC-AC inverter module (13) in a manner that controlsably boosts the high-frequency AC voltage generated by the DC-AC inverter module (13) to a high-frequency AC voltage of 2000V to 15000V.

9. The explosion-proof DC high-voltage power supply device for plasma ignition of flammable media as described in claim 8, characterized in that, The AC-DC high-frequency rectifier module (15) outputs DC high-voltage electricity capable of long-distance ignition power supply through full-bridge rectification or voltage multiplier rectification.

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