Low-temperature plasma aerial fog generating device and grain warehouse mould and pest killing device

Abstract

The utility model provides a low-temperature plasma aerial fog generating device and a grain warehouse mould and pest killing device, which comprise a plasma generator, a fan and a closed cavity which are integrated in a main box body, the plasma generator is arranged in the closed cavity, the closed cavity is provided with an air inlet and an air outlet, and the fan is arranged in the closed cavity. The air inlet is connected with an air outlet of the fan, and the air outlet is communicated with the outside. The utility model further provides a low-temperature plasma aerial fog generating device which comprises a grain warehouse and the low-temperature plasma aerial fog generating device. The low-temperature plasma aerial fog generating device can generate plasmas and continuously discharge high-concentration plasma aerial fog through the fan; the low-temperature plasma aerial fog generating device is combined with the grain depot, the device can be used for treating original microorganisms and pests of grain raw materials before the grain is stored in the grain depot, chemical residues are avoided, the device is environmentally friendly, pollution-free and high in efficiency, the quality of the grain is not damaged, and the grain can be stored for a longer time without other matched storage technologies.

Description

Technical field:

[0001] The utility model belongs to the technical field of air purification and insecticide sterilization, and specifically relates to a low-temperature plasma aerosol generating device and a mildew and pest disinfecting device for a grain warehouse. Background technology:

[0002] Plasma is a collection of positively and negatively charged ions and electrons, and possibly some neutral atoms and molecules, and is generally produced by dielectric barrier discharge.

[0003] In recent years, research on plasma technology has been relatively active. Plasma can be widely used in many fields such as the synthesis of new substances, new materials and environmental pollution control. Low-temperature plasma degradation of pollutants uses these high-energy electrons, free radicals and other active particles to interact with pollutants in exhaust gas, causing pollutant molecules to decompose in a very short time, and various subsequent reactions occur to achieve the purpose of degrading pollutants.

[0004] However, in current plasma-related pollutant degradation devices, a DBD plasma generator is usually placed in an integrated device to work together with other degradation procedures, and currently no device that can produce high-concentration plasma mist alone has been disclosed.

[0005] In addition, the current treatment of microorganisms and pests in grain raw materials before storage in grain warehouses mainly adopts phosphine circulation fumigation technology. However, the phosphine residue in this operation is relatively obvious, and improper operation of phosphine fumigation technology may cause explosion. There are hidden dangers to personnel safety, and the microbial resistance makes the insecticide efficiency low, resulting in incomplete insecticide control. Therefore, it is necessary to develop a green management method that can avoid chemical pollution, delay the grain aging process, and ensure food safety.

[0006] Based on the above, the utility model provides a low-temperature plasma mist generating device, which can derive high-concentration plasma mist for use in multiple fields. The utility model also provides a grain warehouse mold and pest disinfecting device to achieve green management of grain warehouses. Summary of the invention:

[0007] The first purpose of the utility model is to provide a low-temperature plasma mist generating device, which can generate high-concentration plasma mist and can be used for air purification and insecticide sterilization.

[0008] The second purpose of the utility model is to provide a device for disinfecting mold and pests in a grain warehouse, which generates high-concentration plasma aerosol through a low-temperature plasma aerosol generating device, and is used for disinfecting mold and pests in the grain warehouse to avoid chemical residues and incomplete pest control.

[0009] The utility model adopts the following technical solutions:

[0010] (I) The utility model provides a low-temperature plasma aerosol generating device, comprising a plasma generator, a fan and a closed cavity; the plasma generator is arranged inside the closed cavity, and an air inlet and an air outlet are arranged on the closed cavity, the air inlet is connected to the exhaust port of the fan, and the air outlet is connected to the outside.

[0011] Furthermore, the air inlet of the closed cavity is provided with an air inlet hood, and the air outlet is provided with an air outlet hood; the two ends of the air inlet hood are respectively connected to the air inlet of the closed cavity and the air exhaust outlet of the fan, one end of the air outlet hood is connected to the air outlet of the closed cavity, and the other end is connected to the outside through a pipeline.

[0012] Furthermore, the air inlet hood and the air outlet hood have the same structure, both of which are square ventilation hoods, and the square interface ends of the air inlet hood and the air outlet hood are respectively fixedly connected to the air inlet and air outlet of the closed cavity, the circular interface end of the air inlet hood is connected to the fan exhaust port, and the circular interface end of the air outlet hood is connected to the outside through a pipe.

[0013] Furthermore, impellers are respectively provided at the air inlet and the air outlet of the closed cavity, and the impellers are rotatably mounted at the air inlet and the air outlet of the closed cavity.

[0014] Furthermore, an ozone sensor, a nitrogen oxide sensor and a temperature and humidity sensor are arranged in the closed cavity.

[0015] Furthermore, the plasma generator includes a plurality of electrode assemblies, which are fixed in a closed cavity by an electrode fixing frame; the electrode fixing frame is in a rectangular box structure, and two opposite sides of the rectangular box are respectively provided with through holes with the same number as the electrode assemblies, and the positions of the through holes opened on the two sides correspond one to one; the electrode assembly is mounted between the two sides of the rectangular box through the through holes.

[0016] Furthermore, the two ends of the electrode assembly pass through the through holes on the two sides of the rectangular box and are fixed by a mounting seat; the mounting seat is detachably fixedly connected to the rectangular box, and the mounting seat is provided with air holes for gas to pass through and wire holes for electrode wires to pass through.

[0017] Furthermore, the electrode assembly includes an outer tube and an inner tube; the inner tube is distributed inside the outer tube; plugs are provided at both ends of the inner tube, a high-voltage electrode is provided inside, and metal powder is filled; a metal mesh grounding electrode is provided on the outer surface of the outer tube.

[0018] Furthermore, the plasma generator, the fan and the closed cavity are integrated inside the main box; the main box is also provided with a transformer and a main machine, and the transformer and the main machine are fixedly installed inside the main box; casters are provided at the bottom of the main box.

[0019] (ii) The utility model also provides a device for disinfecting mold and pests in a grain warehouse, the device comprising a grain warehouse and the above-mentioned low-temperature plasma aerosol generating device; the air outlet of the low-temperature plasma aerosol generating device is connected to the air inlet of the grain warehouse through a pipeline, and a valve is provided on the pipeline. The device is used to treat the original microorganisms and pest base of grain raw materials before the grain storage warehouse. It has a significant effect on fumigating insect eggs, solves the problem of fumigating insects with drug resistance, and can effectively remove mold and odor while killing insects. There is no pesticide residue, no pollution to grain and the environment, and can achieve true green grain storage.

[0020] Beneficial effects of the utility model:

[0021] (1) The low-temperature plasma mist generating device provided by the utility model can generate plasma through an ion generator and continuously discharge high-concentration plasma mist through a fan, which can be used for sterilization and insecticide.

[0022] (2) The grain warehouse mold and pest control device provided by the utility model can be widely used in the treatment of original microorganisms and pests of grain raw materials in front of grain storage warehouses. The treatment by this equipment can effectively reduce the risk of loss caused by mildew and pest reproduction in later storage grain. It is environmentally friendly and pollution-free, highly efficient, and the grain quality is not damaged in any way. It can be stored for a longer time without the need for other supporting storage technologies.

[0023] (3) The utility model has a significant fumigation effect on insect eggs, which solves the problem of fumigation of insect resistance. While killing insects, it can also effectively remove mold and odor without any pesticide residue.

[0024] (4) The utility model has a simple structure, convenient operation, good treatment effect and no pollution. It adopts modular electrode production, can be quickly assembled, unassembled, repaired and installed, and has strong practicality. Description of the drawings:

[0025] Figure 1 This is a diagram of the internal structure of the low-temperature plasma aerosol generating device according to an embodiment of the utility model;

[0026] Figure 2 This is a top view of the closed cavity of an embodiment of the utility model;

[0027] Figure 3 This is a side view of a low-temperature plasma mist generating device according to an embodiment of the utility model;

[0028] Figure 4 This is a three-dimensional diagram of a low-temperature plasma aerosol generating device according to an embodiment of the utility model;

[0029] Figure 5 This is a front view of the electrode fixing frame of the embodiment of the utility model;

[0030] Figure 6 This is a three-dimensional diagram of the electrode fixing frame of the embodiment of the utility model;

[0031] Figure 7 This is a schematic diagram of a mounting base according to an embodiment of the utility model;

[0032] Figure 8 This is a side view of the electrode fixing frame of the utility model embodiment;

[0033] Fig. 9 This is a top view of the electrode fixing frame of the embodiment of the utility model;

[0034] Fig.10 This is a schematic diagram of the structure of the electrode assembly of the utility model embodiment;

[0035] Fig.11 This is a schematic diagram of the combination of a low-temperature plasma mist generating device and a grain warehouse;

[0036] The markings in the accompanying drawings are:

[0037] 1. Main chassis; 2. Fan; 3. Enclosed cavity; 4. Air inlet hood; 5. Air outlet hood; 6. Casters; 7. Electrode fixing frame; 8. Electrode assembly; 8-1. Outer tube; 8-2. Inner tube; 8-3. High-voltage electrode; 8-4. Plug; 8-5. Metal mesh grounding electrode; 9. Mounting base; 10. Transformer; 11. Main unit; 12. Temperature and humidity sensor; 13. Nitrogen oxide sensor; 14. Ozone sensor; 15. Grain warehouse. Specific implementation method:

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] Example 1

[0040] Reference Figure 1 The embodiment of the utility model provides a low-temperature plasma aerosol generating device, including a plasma generator, a fan 2 and a closed cavity 3, the fan 2 is a centrifugal fan; the plasma generator is arranged inside the closed cavity 3, and the closed cavity 3 is provided with an air inlet and an air outlet, the air inlet is connected to the exhaust port of the fan 2, and the air outlet is connected to the outside.

[0041] When in use, the fan 2 is turned on, and the fan 2 discharges gas into the closed cavity 3, so that the plasma generated in the closed cavity 3 is discharged along with the air flow to form a high-concentration plasma mist.

[0042] Example 2

[0043] The main structure of this embodiment is the same as that of embodiment 1, except that:

[0044] In this embodiment, the air inlet of the closed cavity 3 is provided with an air inlet cover 4, and the air outlet is provided with an air outlet cover 5;

[0045] Specifically, refer to Figure 1 The air inlet cover 4 and the air outlet cover 5 have the same structure, both of which are square and round ventilation covers, and the square interface ends of the air inlet cover 4 and the air outlet cover 5 are respectively connected to the air inlet and the air outlet of the closed cavity 3, and the air inlet cover 4 and the air outlet cover 5 are fixedly installed on the closed cavity 3. The circular interface end of the air inlet cover 4 is connected to the exhaust port of the fan 2 through a pipeline, and the circular interface end of the air outlet cover 5 is connected to the outside through a pipeline.

[0046] In this embodiment, impellers are respectively provided at the air inlet and the air outlet of the closed cavity 3. The impellers are rotatably installed at the air inlet and the air outlet of the closed cavity 3 to make the gas flowing into and out of the closed cavity 3 uniform.

[0047] Example 3

[0048] The main structure of this embodiment is the same as that of Embodiment 2, except that this embodiment limits the installation method of the ion generator.

[0049] Specifically, refer to Figure 1 The plasma generator includes a plurality of electrode assemblies 8, which are fixed in the closed cavity 3 through an electrode fixing frame 7; the electrode fixing frame 7 is in a rectangular box structure, and two opposite sides of the rectangular box are respectively provided with through holes with the same number as the electrode assemblies 8, and the positions of the through holes opened on the two sides correspond to each other; the electrode assembly 8 is mounted between the two sides of the rectangular box through the through holes.

[0050] In this embodiment, the two ends of the electrode assembly 8 pass through the through holes on the two sides of the rectangular box and are fixed by the mounting seat 9. The mounting seat 9 is detachably fixedly connected to the rectangular box, and the mounting seat 9 is provided with air holes for gas to pass through and wire holes for wires to pass through.

[0051] Example 4

[0052] The main structure of this embodiment is the same as that of Embodiment 3, except that this embodiment limits the structure of the electrode assembly 8 .

[0053] Specifically, refer to Figure 1 The electrode assembly 8 includes an outer tube 8-1 and an inner tube 8-2; the inner tube 8-2 is distributed inside the outer tube 8-1; plugs 8-4 are provided at both ends of the inner tube 8-2, a high-voltage electrode 8-3 is provided inside, and metal powder (aluminum powder) is filled; a metal mesh grounding electrode 8-5 is provided on the outer surface of the outer tube 8-1. The outer tube 8-1 and the inner tube 8-2 are made of corundum, ceramic or quartz.

[0054] In this embodiment, the outer tube 8-1 and the inner tube 8-2 are coaxially distributed, and the high-voltage electrode 8-3 is distributed on the central axis of the inner tube 8-2.

[0055] When in use, a potential difference is generated between the high voltage electrode 8-3 of the inner tube 8-2 and the metal mesh grounding electrode 8-5 of the outer tube 8-1, and plasma is generated in the annular cavity between the inner tube 8-2 and the outer tube 8-1. External gas is transported into the closed cavity 3 through the fan 2, and then enters the annular cavity between the inner tube 8-2 and the outer tube 8-1 through the air holes on the mounting seat 9. The generated plasma is discharged with the air flow to form a high-concentration plasma mist.

[0056] Example 5

[0057] The main structure of this embodiment is the same as that of embodiment 4, except that:

[0058] Reference Figure 1 In this embodiment, the plasma generator, the fan 2 and the closed cavity 3 are integrated inside the main box 1; the main box 1 is also provided with a transformer 10 and a main machine 11, and the transformer 10 and the main machine 11 are fixedly installed inside the main box 1; casters are provided at the bottom of the main box 1, and the main box 1 is equipped with a door that can be quickly disassembled.

[0059] Example 6

[0060] The main structure of this embodiment is the same as that of embodiment 5, except that:

[0061] In this embodiment, refer to Figure 1 The closed cavity 3 is provided with an ozone sensor, a nitrogen oxide sensor and a temperature and humidity sensor, which can monitor the working environment parameters in real time when the equipment is working, so as to improve the safety, stability and reliability of grain storage. In this embodiment, the outer wall of the main box 1 is provided with a touch screen, which can be used to control the operating parameters of the fan 2 and the electrode assembly 8.

[0062] Example 7

[0063] This embodiment provides a device for disinfecting mold and pests in a grain warehouse. Figure 1The device includes a grain warehouse 15 and a low-temperature plasma aerosol generating device as described in any one of embodiments 1 to 6; the air outlet of the low-temperature plasma aerosol generating device is connected to the air inlet of the grain warehouse 15 through a pipeline, and a valve is provided on the pipeline. The aerosol generated by the low-temperature plasma aerosol generating device enters the grain warehouse 15 through the pipeline for insecticide sterilization.

[0064] This device adopts dielectric discharge electrodes to generate ion flow of O3 and its composite gas under the control of high-voltage transformer and plasma power supply, which is transported to the air inlet of the air inlet hood by high-pressure centrifugal fan. Wind energy transports the ion flow to the air outlet of the air outlet hood and enters the vent of the grain and oil storage depot through a flexible connection. In this way, the ion flow of O3 and its composite gas fills the entire space under the action of the air flow internal circulation system of the grain depot, contacts the cell membrane of microorganisms, causes the permeability of the cell membrane to increase, and the substances in the cells flow out and lose their activity and die, thereby achieving the purpose of disinfection.

[0065] The utility model adopts plasma aerosol sterilization. Fungal infection in grains may be due to field fungi (infecting grains under high humidity) or storage fungi (infecting stored grains under relatively low humidity). Under atmospheric pressure, low-temperature plasma acts on microorganisms, and charged particles and electric fields are key factors leading to microbial inactivation.

[0066] The utility model device can continuously generate high concentrations of positive and negative ions and diffuse them to the surface of microorganisms. When these ions accumulate to a certain concentration, electrostatic repulsion will be generated. Once the accumulated electrostatic repulsion exceeds the surface tension of the microbial cell membrane, the electrostatic repulsion will be converted into shear force, thereby damaging the cell membrane. In the process of energy transfer, high-speed particles can pass through the porous cell wall of the microorganism and enter the microorganism, causing damage to the electrolyte of the microorganism and destroying the cell membrane, ultimately leading to the death of the microorganism. In addition, the high-energy particles generated by the plasma, such as electrons and ions, have strong energy and can directly act on the surface of insect eggs. These high-energy particles can destroy the outer shell structure of the eggs, causing the eggs to lose protection, so that they cannot hatch normally. Gases generated during the plasma generation process, such as reactive nitrogen (RNS), excited oxygen (O2) and nitrogen (N2), can also have harmful effects on insect eggs. These gases react with biological molecules on the surface of the eggs, causing changes or destruction of their structure, making them unable to survive.

[0067] In the application of grain storage, the utility model can improve the storage environment. The high-energy particles and ultraviolet rays generated by the plasma can sterilize the microorganisms in the air and the storage environment, and prevent the growth of mold and bacteria. This helps to maintain the hygienic state of the grain and reduce the risk of mildew and corruption. It can also help remove odors and foreign matter in the grain, decompose some harmful gases and odorous substances, and improve the taste and quality of the grain. During the storage process, the utility model realizes automatic and intelligent control, improves storage efficiency, helps to reduce grain losses, and improves the overall storage effect.

[0068] The above are only preferred implementations of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present utility model should be regarded as the protection scope of the present utility model.

Claims

1. A low-temperature plasma mist generating device, characterized in that: It comprises a plasma generator, a fan (2) and a closed cavity (3); The plasma generator is arranged inside the closed cavity (3); an air inlet and an air outlet are arranged on the closed cavity (3); the air inlet is connected to the air outlet of the fan (2); and the air outlet is connected to the outside; impellers are respectively arranged at the air inlet and the air outlet of the closed cavity (3); the impellers are rotatably mounted at the air inlet and the air outlet of the closed cavity (3).

2. The low-temperature plasma mist generating device according to claim 1, characterized in that: The air inlet of the closed cavity (3) is provided with an air inlet cover (4), and the air outlet is provided with an air outlet cover (5); The two ends of the air inlet cover (4) are respectively connected to the air inlet of the closed cavity (3) and the air outlet of the fan (2); one end of the air outlet cover (5) is connected to the air outlet of the closed cavity (3), and the other end is connected to the outside through a pipeline.

3. The low-temperature plasma mist generating device according to claim 2, characterized in that: The air inlet hood (4) and the air outlet hood (5) have the same structure and are both square ventilation hoods. The square interface ends of the air inlet hood (4) and the air outlet hood (5) are respectively fixedly connected to the air inlet and the air outlet of the closed cavity (3), the circular interface end of the air inlet hood (4) is connected to the air outlet of the fan (2), and the circular interface end of the air outlet hood (5) is connected to the outside through a pipeline.

4. The low-temperature plasma mist generating device according to claim 1, characterized in that: An ozone sensor, a nitrogen oxide sensor and a temperature and humidity sensor are arranged in the closed cavity (3).

5. The low-temperature plasma mist generating device according to claim 1, characterized in that: The plasma generator comprises a plurality of electrode assemblies (8), wherein the electrode assemblies (8) are fixed in the closed cavity (3) via an electrode fixing frame (7); The electrode fixing frame (7) is in the form of a rectangular box structure, and two opposite sides of the rectangular box are respectively provided with through holes having the same number as the electrode assembly (8), and the positions of the through holes provided on the two sides correspond to each other. The electrode assembly (8) is mounted between two side surfaces of the rectangular box through a through hole.

6. The low-temperature plasma mist generating device according to claim 5, characterized in that: The two ends of the electrode assembly (8) pass through the through holes on the two sides of the rectangular box and are fixed by a mounting seat (9); The mounting seat (9) is detachably fixedly connected to the rectangular box, and the mounting seat (9) is provided with air holes for gas to pass through and electric wire holes for electrode wires to pass through.

7. The low-temperature plasma mist generating device according to claim 5, characterized in that: The electrode assembly (8) comprises an outer tube (8-1) and an inner tube (8-2); The inner layer tube (8-2) is distributed inside the outer layer tube (8-1); The inner tube (8-2) is provided with plugs (8-4) at both ends, and is provided with a high-voltage electrode (8-3) inside and is filled with metal powder; The outer surface of the outer layer tube (8-1) is provided with a metal mesh grounding electrode (8-5).

8. The low-temperature plasma mist generating device according to claim 1, characterized in that: The plasma generator, the fan (2) and the closed cavity (3) are integrated and arranged inside the main box (1); A transformer (10) and a host (11) are also provided in the host box (1); the transformer (10) and the host (11) are fixedly installed inside the host box (1); The bottom of the main box (1) is provided with casters.

9. A device for disinfecting mold and pests in a grain warehouse, characterized in that: It comprises a grain warehouse and a low-temperature plasma aerosol generating device as claimed in any one of claims 1 to 8; The air outlet of the low-temperature plasma aerosol generating device is connected to the air inlet of the grain warehouse through a pipeline, and a valve is arranged on the pipeline.

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