Technical device for driving multiple electrodes by frequency-adjustable single power supply in high-voltage electric field

Abstract

The utility model provides a high-voltage electric field frequency-adjustable single power supply driven multi-electrode technical device, which is applied to the technical field of plasma generators, and is formed by connecting a single frequency converter with a plurality of high-frequency transformers, the frequency converter is externally connected with a 220V and 50Hz power supply, and the frequency of the 50Hz power supply is regulated and controlled to be within the range of 15-25kHz of the working frequency of a low-temperature plasma generator through an internal frequency converter; the input ends of the high-frequency transformers are connected in parallel with the frequency converter, and the output ends are independently connected with the low-temperature plasma generator. Through the structure that a single power supply drives a plurality of plasma generators, on the basis that the stability of the system is guaranteed, the output capacity and the application scale of the system are expanded through parallel work of a plurality of plasma emitters, and the requirement for large-scale disinfection is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to high voltage electrical apparatus technical field, concretely relates to a kind of high voltage electric field adjustable frequency single power drive multi-electrode technical device. BACKGROUND

[0002] Low-temperature plasma cold sterilization has the characteristics of broad-spectrum sterilization, no chemical residues, green and safe, and can adapt to the large-scale development of fresh food conditioning food. The high-voltage electric field forming low-temperature plasma needs a high-voltage adjustable frequency power supply to drive a group of electrodes. The high-voltage adjustable frequency power supply is the most basic core component for forming low-temperature plasma. The configuration and optimization of its structure and materials are related to or determine the stability of high-voltage electric field, the degree of arc discharge between high-voltage electrodes, energy consumption and temperature rise, and affect the formation and composition ratio of active oxygen and nitrogen radicals, ozone and other cold sterilization active groups in low-temperature plasma jet.

[0003] Since high-voltage electric field low-temperature plasma belongs to the field of high-voltage electrical apparatus, the stability and reliability of electrodes under high-voltage state are the key to forming low-temperature plasma. The current single power supply driving single electrode group ensures stability, but cannot meet the needs of large-scale production of low-temperature plasma sterilization equipment for fresh agricultural and sideline products. Whether to break through the bottleneck of high-voltage electric field adjustable frequency single power driving multi-electrode core technology device on the basis of existing technology has become the key to the industrial application and development of low-temperature plasma cold sterilization technology. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems in the prior art, the purpose of the utility model is to provide a kind of high-voltage electric field adjustable frequency single power drive multi-electrode technical device. By connecting multiple high-frequency transformers with a single frequency converter, the system's output capacity and application scale are expanded through the parallel operation of multiple plasma emitters, making it suitable for large-scale sterilization.

[0005] A kind of high-voltage electric field adjustable frequency single power drive multi-electrode technical device, comprising a single frequency converter connected to multiple high-frequency transformers, the frequency converter is connected to a 220V, 50Hz power supply, and the internal frequency conversion device is used to adjust the frequency of the 50Hz power supply to the working frequency of the low-temperature plasma generator, which is in the range of 15-25kHz. The input end of the multiple high-frequency transformers is connected in parallel to the frequency converter, and the output end is connected to the low-temperature plasma generator.

[0006] The output of the high-frequency transformer is stable, and the high-frequency transformer raises the power supply voltage from 220V to the working voltage of the low-temperature plasma generator, which is in the range of 8-20kV.

[0007] The system safety is improved by electrical isolation. Each high-frequency transformer is separated by a combination of high-insulation materials and high-voltage electric field shielding materials, and a safety distance of 40-60mm is maintained.

[0008] To avoid high-voltage discharge from sharp corners, the output interface of the high-frequency transformer adopts a rounded transition to prevent high-voltage discharge from sharp corners, and is sealed with a high-insulation material that can withstand 25kV voltage.

[0009] The beneficial effects of this invention are as follows: This high-voltage electric field adjustable frequency single power supply driven multi-electrode technology device drives a single frequency converter through a single power supply, thereby driving multiple high-frequency transformers. The multiple high-frequency transformers then drive multiple plasma generators. While improving output capacity and application scale, it can balance the power of multiple plasma generators, solve the problem of power distribution of the power supply and coordination of plasma generator driving, and ensure the stability of the system.

[0010] Through designs such as electrical isolation, electromagnetic shielding, and safe distances, electrical interference between multiple high-frequency transformers can be reduced, ensuring the stability and safety of the system operation. This effectively reduces the risk of failure that may occur during long-term use of the system and improves the system's reliability and service life. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a structural block diagram of the present invention;

[0013] Figure 2 This is a physical connection simulation diagram of this utility model. Detailed Implementation

[0014] Example 1

[0015] like Figure 1 , Figure 2 As shown, a high-voltage electric field adjustable frequency single power supply driven multi-electrode technology device includes a single frequency converter connected to multiple high-frequency transformers. The frequency converter is externally connected to a 220V, 50Hz power supply, and the frequency of the 50Hz power supply is adjusted to the operating frequency range of 15-25kHz of the low-temperature plasma generator through internal frequency conversion devices. The input terminals of the multiple high-frequency transformers are connected in parallel to the frequency converter, and the output terminals are individually connected to the low-temperature plasma generator.

[0016] By using a single power supply to drive a single frequency converter, which in turn drives multiple high-frequency transformers, and then using these multiple high-frequency transformers to drive multiple plasma generators, the parallel operation of multiple plasma generators is achieved, expanding the system's output capacity and application scale, and making it suitable for large-scale disinfection needs.

[0017] The frequency converter converts the power supply signal output by the power supply into a variable frequency signal with a frequency range of 15-25 kHz, providing a specific frequency range to optimize the working efficiency and stability of the plasma generator. The high-frequency transformer converts the variable frequency signal output by the frequency converter into a variable voltage signal with an output voltage range of 8-20 kV.

[0018] Through the cooperation between the frequency converter and the high-frequency transformer, a specific range of high-frequency high-voltage driving signal is obtained to drive the corresponding plasma generator, ensuring that the plasma generator can work normally.

[0019] In addition, in order to improve the stability and safety of the system, a separation layer is arranged between each high-frequency transformer, which is made of a combination material including insulating material and electromagnetic shielding material. By combining materials to reduce electrical interference, the safety of the system is further improved.

[0020] By electrical isolation to improve system safety, a safety distance is provided between each high-frequency transformer, with a safety distance range of 40-60 mm. The safety distance can prevent discharge or short circuit risk that may occur under high voltage conditions, improving the safety and stability of the system.

[0021] The output port of the high-frequency transformer is provided with a rounded structure, which can avoid high-voltage discharge phenomenon caused by sharp corners. The output port of the high-frequency transformer is provided with an insulating material with a withstand voltage value of 25KV.

[0022] Working principle: The high-voltage electric field adjustable frequency single power source drives the multi-electrode technology device. When in use, the power supply outputs a power supply signal of 220V, 50Hz, which is converted by the frequency converter to generate a variable frequency signal with a frequency range of 15-25 kHz. Multiple high-frequency transformers generate variable voltage signals with a voltage range of 8-20 kV according to the variable frequency signal. At this time, the high-frequency high-voltage signal with a voltage range of 8-20 kV and a frequency range of 15-25 kHz is used as a driving signal to drive the plasma generator to work. The output power of the multiple plasma generators connected in parallel is balanced, which can improve the stability of the system.

[0023] Example two

[0024] As shown in Figure 1 The structure of the present embodiment is basically the same as that of example one, except that the present embodiment is provided with four high-frequency transformers and four plasma generators. The input ends of the four high-frequency transformers are connected in parallel with the output end of the frequency converter, and the output ends of the four high-frequency transformers are connected to the four plasma generators correspondingly.

[0025] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-voltage electric field adjustable frequency single power driven multi-electrode technology device, comprising a single frequency converter connected to multiple high-frequency transformers, characterized in that: The frequency converter is externally connected to a 220V, 50Hz power supply, and the frequency of the 50Hz power supply is adjusted to the working frequency range of 15-25kHz of the low-temperature plasma generator through internal frequency conversion devices; The input ends of the multiple high-frequency transformers are connected in parallel to the frequency converter, and the output ends are separately connected to the low-temperature plasma generator.

2. The high-voltage electric field adjustable frequency single power source driving multi-electrode technology device according to claim 1, characterized in that: The high-frequency transformer raises the power supply voltage of 220V to the working voltage range of 8-20kV of the low-temperature plasma generator.

3. The high-voltage electric field adjustable frequency single power source driving multi-electrode technical device according to claim 1 or 2, characterized in that: Each high-frequency transformer is separated by a combination of high-insulation material and high-voltage electric field shielding material, and maintains a safety distance of 40-60mm.

4. The high-voltage electric field adjustable frequency single power source driving multi-electrode technology device according to claim 1, characterized in that: The output end interface of the high-frequency transformer adopts a rounded corner transition to avoid high-voltage discharge at sharp corners, and is enclosed with high-insulation material that can withstand a voltage of 25kV.

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