A phase gradient metasurface logistics packaging disinfection device and disinfection method

Abstract

The present invention provides a phase gradient metasurface logistics packaging disinfection device and disinfection method, the device includes an electromagnetic metamaterial disinfection box body, which has a plurality of electromagnetic metamaterial disinfection units, each electromagnetic metamaterial disinfection unit includes a wave-transmitting material layer, an electromagnetic metamaterial layer, and an electromagnetic metamaterial isolation layer, and a hole array is arranged on the electromagnetic metamaterial layer; an electromagnetic resonance cavity is formed between the electromagnetic metamaterial isolation layer and the electromagnetic metamaterial layer; as high-frequency electromagnetic waves pass through the wave-transmitting material layer and enter the electromagnetic resonance cavity through the hole array, after reciprocating reflections by the electromagnetic metamaterial isolation layer and the electromagnetic metamaterial layer, the high-frequency electromagnetic waves converge in the electromagnetic resonance cavity to form a high-frequency electromagnetic field, which is used to heat and disinfect the outer wall of the wave-transmitting material layer. The disinfection method of the present invention can not only improve the disinfection efficiency and energy utilization efficiency of microorganisms such as viruses, avoid contamination of internal items, but also isolate internal items to avoid damage to internal items by high-frequency electromagnetic waves.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave disinfection, and in particular to a logistics packaging disinfection device and a disinfection method of a phase gradient metasurface. Background Art

[0002] Express logistics has become a basic industry supporting economic development. It can connect production, distribution, circulation, consumption and other links. With the growth of express logistics volume, it has promoted the circulation of commerce.

[0003] Traditional disinfection technologies include chemical disinfection and ozone disinfection, filtration and electrostatic adsorption, plasma disinfection technology, ultraviolet disinfection, high-frequency electromagnetic disinfection, etc. Among them, chemical disinfection and ozone disinfection are not only inefficient, but also easy to leave residual substances that are harmful to the environment and human body; filtration and electrostatic adsorption cannot inactivate pathogens, and there is a defect of excessive energy consumption; plasma disinfection technology is cumbersome to operate and is easy to produce by-products that are harmful to the human body; ultraviolet disinfection has the advantages of wide and rapid sterilization range and short processing time, but it is not easy to achieve uniform radiation sterilization in the entire processing space, there are shadow areas of irradiation, and lack of continuous disinfection ability, and there may be problems with photoresurrection of microorganisms. High-frequency electromagnetic disinfection has a fast effect and little environmental pollution. It can cause biological cells to be impacted and shaken, destroy the outer layer structure of the cell, and then destroy the balance of substances inside and outside the cell, causing cell death. Therefore, high-frequency electromagnetic disinfection can be used for the disinfection of express parcels.

[0004] At present, the high-frequency electromagnetic disinfection technology based on traditional metamaterials has overcome the shortcomings of the above disinfection technology and can quickly, safely and stably gather microwaves to disinfect express delivery. However, high-frequency electromagnetic waves can easily pass through express packages and enter the interior, causing certain damage to the items inside the package. In addition, the heat generated by high-frequency electromagnetic waves gathered on the express delivery can easily be transferred to the interior of the package, causing damage to the items inside the package. Therefore, it is necessary to develop a disinfection device that can separate the internal items from the outside world to prevent the internal items from contacting the virus, and can easily and quickly use high-frequency electromagnetic waves to disinfect the outer surface of the express package without causing the high-frequency electromagnetic waves to contact the internal items. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a logistics packaging disinfection device and disinfection method with a phase gradient metasurface.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows.

[0007] A phase gradient metasurface logistics packaging disinfection device includes an electromagnetic metamaterial disinfection box body, the electromagnetic metamaterial disinfection box body has a plurality of electromagnetic metamaterial disinfection units, each of the electromagnetic metamaterial disinfection units includes:

[0008] Wave-transmitting material layer;

[0009] an electromagnetic metamaterial layer, attached to one side of the wave-transmitting material layer, wherein the electromagnetic metamaterial layer is provided with a hole array; and

[0010] An electromagnetic metamaterial isolation layer, which is disposed on one side of the electromagnetic metamaterial layer and forms an electromagnetic resonance cavity with the electromagnetic metamaterial layer;

[0011] As the high-frequency electromagnetic waves pass through the wave-transmitting material layer and enter the electromagnetic resonance cavity through the hole array, after reciprocating reflection by the electromagnetic metamaterial isolation layer and the electromagnetic metamaterial layer, the high-frequency electromagnetic waves converge in the electromagnetic resonance cavity to form a high-frequency electromagnetic field, which is used to heat and disinfect the outer wall of the wave-transmitting material layer.

[0012] Furthermore, the wave-transmitting material layer is composed of a zirconium-containing aluminum silicate fiberboard.

[0013] Furthermore, the zirconium-containing aluminum silicate fiberboard is a honeycomb zirconium-containing aluminum silicate fiberboard.

[0014] Furthermore, the electromagnetic metamaterial layer includes a first metal plate and a first dielectric substrate which are connected in sequence, and the first metal plate is arranged on a side of the electromagnetic metamaterial layer attached to the wave-transmitting material layer.

[0015] Furthermore, the electromagnetic metamaterial isolation layer includes a metal resonance unit, a second dielectric substrate and a second metal plate connected in sequence, the metal resonance unit is arranged on a side of the second dielectric substrate facing the electromagnetic resonance cavity, and the second metal plate is attached to the other side of the second dielectric substrate.

[0016] Furthermore, the metal resonance unit is a square metal coating, and the metal resonance unit can be used to adjust the phase of the high-frequency electromagnetic wave and reflect the high-frequency electromagnetic wave.

[0017] Furthermore, the electromagnetic resonance cavity is filled with boron nitride fiber material.

[0018] Furthermore, the distance between the electromagnetic metamaterial layer and the electromagnetic metamaterial isolation layer is 106-116 mm.

[0019] Furthermore, it also includes:

[0020] A microwave generating system, including a power supply, a magnetron and a transmission antenna connected in sequence, is used to generate and transmit high-frequency electromagnetic waves;

[0021] A metal resonant cavity is connected to the transmission antenna, the electromagnetic metamaterial disinfection box is arranged in the metal resonant cavity, and the inner wall of the metal resonant cavity has at least one electromagnetic metamaterial structural unit, which is used to gather the high-frequency electromagnetic waves generated by the microwave generating system at the corresponding position in the metal resonant cavity.

[0022] The present invention also provides a disinfection method of a logistics packaging disinfection device of a phase gradient metasurface, comprising the following steps:

[0023] Starting a power supply, connecting the magnetron through the power supply to generate high-frequency electromagnetic waves, which enter the metal resonant cavity through the transmission antenna and gather at corresponding positions in the metal resonant cavity to generate high-frequency oscillations;

[0024] Afterwards, the high-frequency electromagnetic wave passes through the wave-transmitting material layer, enters the electromagnetic resonance cavity through the hole array, and then after reciprocating reflection by the electromagnetic metamaterial isolation layer and the electromagnetic metamaterial layer, the high-frequency electromagnetic wave converges in the electromagnetic resonance cavity to form a high-frequency electromagnetic field;

[0025] The heat energy generated by the high-frequency electromagnetic field is transferred to the outer wall of the wave-transmitting material layer through the electromagnetic metamaterial layer, so as to heat up and disinfect the surface of the electromagnetic metamaterial disinfection box body;

[0026] At the same time, the high-frequency electromagnetic waves in the resonant cavity pass through the hole array and reach the outer wall of the wave-transmitting material layer, so as to perform surface disinfection on the electromagnetic metamaterial disinfection box.

[0027] In the present invention, high-frequency electromagnetic waves gather at corresponding positions in the metal resonance cavity, and the generated high-frequency oscillation acts on the electromagnetic metamaterial disinfection box body; after the high-frequency electromagnetic waves pass through the wave-transparent material layer of the electromagnetic metamaterial disinfection box body, the electromagnetic metamaterial layer and the electromagnetic metamaterial isolation layer perform phase compensation on the high-frequency electromagnetic waves, and continuously reflect the high-frequency electromagnetic waves, so that the high-frequency electromagnetic waves are gathered in the space formed by the electromagnetic metamaterial layer and the electromagnetic metamaterial isolation layer, and will not enter the internal space where the object is located, so that the electric field between the electromagnetic metamaterial layer and the electromagnetic metamaterial isolation layer is enhanced to generate heat energy, so that the wave-transparent material layer close to the electromagnetic metamaterial layer is rapidly heated, and acts on viruses and other microorganisms on the outer surface of the electromagnetic metamaterial disinfection box body, so as to disinfect viruses and other microorganisms on its outer surface; at the same time, the high-frequency electromagnetic waves in the metal resonance cavity that reach the outer surface of the electromagnetic metamaterial disinfection box body will also disinfect viruses and other microorganisms on its outer surface; thereby, not only can the disinfection efficiency and energy utilization efficiency of viruses and other microorganisms be improved, and contamination of internal objects be avoided, but also internal objects can be isolated to avoid damage to internal objects by high-frequency electromagnetic waves.

[0028] Beneficial effects of the present invention:

[0029] 1. The present invention forms an electromagnetic resonant cavity between the electromagnetic metamaterial isolation layer and the electromagnetic metamaterial layer, so that high-frequency electromagnetic waves are reflected back and forth by the electromagnetic metamaterial isolation layer and the electromagnetic metamaterial layer, and then converge in the electromagnetic resonant cavity to form a high-frequency electromagnetic field, which is used to heat and disinfect the outer wall of the wave-transmitting material layer.

[0030] 2. The outer layer structure of the electromagnetic metamaterial disinfection box of the present invention is composed of a honeycomb structure, which has strong bearing capacity, saves materials, and can prevent collision and damage during transportation.

[0031] 3. The disinfection method of the present invention can not only quickly disinfect the outer surface of the box containing items, isolate external germs, improve the disinfection efficiency and energy utilization efficiency of microorganisms such as viruses, and avoid contamination of internal items, but also isolate internal items to avoid damage to internal items by high-frequency electromagnetic waves, thereby ensuring the safety of the disinfected items inside. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the structure of the electromagnetic metamaterial disinfection box.

[0033] Figure 2 Schematic diagram of the structure of the electromagnetic metamaterial layer.

[0034] Figure 3 Schematic diagram of the structure of the electromagnetic metamaterial isolation layer.

[0035] Figure 4 for Figure 3 Schematic diagram of the local structure of the electromagnetic metamaterial isolation layer.

[0036] Figure 5 This is a schematic diagram of the structure of a logistics packaging disinfection device based on a phase gradient metasurface.

[0037] In the figure, 1, electromagnetic metamaterial disinfection box; 11, wave-transmitting material layer; 12, electromagnetic metamaterial layer; 121, first metal plate; 122, first dielectric substrate; 123, hole array; 13, electromagnetic metamaterial isolation layer; 131, metal resonance unit; 132, second dielectric substrate; 133, second metal plate; 14, electromagnetic resonance cavity;

[0038] 2. Microwave generating system; 21. Power supply; 22. Magnetron; 23. Transmission antenna;

[0039] 3. Metal resonant cavity; 31. Electromagnetic metamaterial structural unit. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0042] Unless otherwise specified, the experimental methods described in the following examples are all conventional methods; the reagents and materials described are all commercially available unless otherwise specified.

[0043] Example 1

[0044] See also Figures 1 to 5 A phase gradient metasurface logistics packaging disinfection device includes an electromagnetic metamaterial disinfection box 1, a microwave generating system 2 and a metal resonant cavity 3.

[0045] like Figure 1 The electromagnetic metamaterial disinfecting box body 1 has a plurality of electromagnetic metamaterial disinfecting units, and the plurality of disinfecting units constitute six surfaces of the electromagnetic metamaterial disinfecting box body 1. Each electromagnetic metamaterial disinfecting unit includes a wave-transmitting material layer 11, an electromagnetic metamaterial layer 12 and an electromagnetic metamaterial isolation layer 13.

[0046] The wave-transmitting material layer 11 is located on the outer surface of the electromagnetic metamaterial disinfection box 1, wherein the wave-transmitting material layer 11 is composed of a zirconium-containing aluminum silicate fiberboard (ZAF); the zirconium-containing aluminum silicate fiberboard is a honeycomb zirconium-containing aluminum silicate fiberboard, in which a honeycomb structure layer is inserted between two layers of ZAF, with a total thickness of 1 to 2 mm, and has the advantages of low expansion coefficient, high temperature resistance, light weight and good wave transmission performance. Especially when the frequency of high-frequency electromagnetic waves is 2.45 GHz, the performance in all aspects is very good, the dielectric constant is large, the dielectric loss factor is small, the dielectric constant and the dielectric loss factor change little at high temperature, and the thermal conductivity is high. Therefore, when the high-frequency electromagnetic wave generates heat energy, it can still allow most of the electromagnetic waves to pass through, and the energy lost when the electromagnetic wave passes through is very small, and at the same time, the heat generated by the inner layer of high-frequency electromagnetic waves can also be conducted to the outer surface of the electromagnetic metamaterial disinfection box 1. In the embodiment of the present invention, the wave-transmitting material layer 11 is provided for the following purposes: on the one hand, it is used to allow high-frequency electromagnetic waves to pass through, thereby contacting the electromagnetic metamaterial layer 12 and entering the electromagnetic resonant cavity 14 between the electromagnetic metamaterial layer 12 and the electromagnetic metamaterial isolation layer 13; on the other hand, it is used to conduct the heat generated by the high-frequency electromagnetic field to the outer surface of the electromagnetic metamaterial disinfection box 1.

[0047] See also Figure 1 and Figure 2, the electromagnetic metamaterial layer 12 is attached to one side of the wave-transparent material layer 11, and a hole array 123 is arranged on the electromagnetic metamaterial layer 12. In the embodiment of the present invention, the electromagnetic metamaterial layer 12 is tightly attached to the inner surface of the wave-transparent material layer (11), constituting the second internal layer of the electromagnetic metamaterial disinfection box body 1. Specifically, the electromagnetic metamaterial layer 12 includes a first metal plate 121 and a first dielectric substrate 122 connected in sequence, and the first metal plate 121 is arranged on the side of the electromagnetic metamaterial layer 12 attached to the wave-transparent material layer 11. That is, the first metal plate 121 is tightly attached to the inner surface of the wave-transparent material layer 11, and the first dielectric substrate 122 is tightly attached to the inner surface of the first metal plate 121. Among them, the first metal plate 121 is an aluminum plate with a honeycomb structure, which is a honeycomb structure layer inserted between two thin aluminum plates. The first dielectric substrate 122 is an FR4 substrate. In the embodiment of the present invention, the electromagnetic metamaterial layer 12 has a periodically arranged hole array. After the high-frequency electromagnetic wave passes through the wave-transmitting material layer 11, it can pass through the electromagnetic metamaterial layer 12 through the hole array and reach the electromagnetic metamaterial isolation layer 13, and can reflect the high-frequency electromagnetic wave reflected back by the electromagnetic metamaterial isolation layer 13. Figure 2 , an electromagnetic metamaterial layer 12 with a periodically arranged circular hole array, the radius of the circular hole is between 25.5 and 35.5 mm, and the distance between two adjacent circular holes is 6 to 26 mm. In the embodiment of the present invention, the electromagnetic metamaterial layer 12 is provided to allow the high-frequency electromagnetic waves from the wave-transparent material layer 11 to pass through, and on the other hand, to reflect the high-frequency electromagnetic waves in the electromagnetic resonant cavity 14, and to export the heat generated by the high-frequency electromagnetic field.

[0048] See also Figure 1 and Figure 3 to Figure 4 The electromagnetic metamaterial isolation layer 13 is arranged on one side of the electromagnetic metamaterial layer 12, and an electromagnetic resonant cavity 14 is formed between it and the electromagnetic metamaterial layer 12; in the embodiment of the present invention, the electromagnetic metamaterial isolation layer 13 is very close to the inner surface of the electromagnetic metamaterial layer 12, forming the third layer inside the electromagnetic metamaterial disinfection box 1, and the enclosed space is used to place items that need to be isolated and protected.

[0049] Specifically, the electromagnetic metamaterial isolation layer 13 includes a metal resonance unit 131, a second dielectric substrate 132 and a second metal plate 133 connected in sequence. The metal resonance unit 131 is arranged on a side of the second dielectric substrate 132 facing the electromagnetic resonance cavity 14, and the second metal plate 133 is attached to the other side of the second dielectric substrate 132.

[0050] like Figure 3 and Figure 4, the metal resonance unit 131 is a square metal coating, for example, the square metal coating is a periodically arranged square copper ring coating structure, the inner ring side length of the square metal coating is 6 to 14 mm, and the outer ring side length is 16 to 32 mm. When the high-frequency electromagnetic wave is incident on the square copper ring coating structure, an equivalent inductance is formed in the copper ring. Since the inner and outer rings form an equivalent capacitance, an LC resonance is formed. The equivalent magnetic permeability of this copper ring structure and the equivalent dielectric constant formed by the periodic arrangement of the copper ring structure work together to adjust the refractive index of the high-frequency electromagnetic wave so that the high-frequency electromagnetic wave is reflected at a certain angle. In an embodiment of the present invention, the metal resonance unit 131 can be used to adjust the phase of the high-frequency electromagnetic wave and reflect the high-frequency electromagnetic wave. The second dielectric substrate 132 and the first dielectric substrate 122 are both FR4 substrates, which have high mechanical and dielectric properties and good heat resistance, and are conducive to the formation of resonance in the square copper ring coating structure. The second metal plate 133 is an aluminum plate with a honeycomb structure, which is a honeycomb structure layer inserted between two thin aluminum plates. The second metal plate 133 has a good shielding effect on high-frequency electromagnetic waves, so it can be used to shield high-frequency electromagnetic waves. The second dielectric layer 132 is close to the second metal plate 133, and the second metal plate 133 can fully reflect the remaining high-frequency electromagnetic waves passing through the second dielectric substrate 132 to prevent the high-frequency electromagnetic waves from leaking and contacting the internal objects.

[0051] As the high-frequency electromagnetic waves pass through the wave-transmitting material layer 11 and enter the electromagnetic resonance cavity 14 through the hole array 123, after being reciprocated by the electromagnetic metamaterial isolation layer 13 and the electromagnetic metamaterial layer 12, the high-frequency electromagnetic waves converge in the electromagnetic resonance cavity 14 to form a high-frequency electromagnetic field, which is used to heat and disinfect the outer wall of the wave-transmitting material layer 11.

[0052] In the embodiment of the present invention, the second dielectric substrate 132 is divided into periodically arranged units, each unit having a square metal coating. The second dielectric substrate 132 and the square metal coating are used to adjust the phase of the high-frequency electromagnetic wave so that the high-frequency electromagnetic wave is reflected to the electromagnetic metamaterial layer 12, and the high-frequency electromagnetic wave is then reflected by the electromagnetic metamaterial isolation layer 13. After repeated reflection, the electromagnetic metamaterial isolation layer 13 and the electromagnetic metamaterial layer 12 form an electromagnetic resonant cavity 14, so that the high-frequency electromagnetic wave oscillates to form a standing wave, thereby enhancing the electric field and forming a high-frequency electromagnetic field. Therefore, the high-frequency electromagnetic wave reflected from the electromagnetic metamaterial disinfection box body 1 through the wave-transmitting material layer 11 can further disinfect the outer surface of the electromagnetic metamaterial disinfection box body 1.

[0053] like Figure 1, the distance between the electromagnetic metamaterial layer 12 and the electromagnetic metamaterial isolation layer 13 is 106-116 mm. The electromagnetic resonance cavity 14 between the electromagnetic metamaterial layer 12 and the electromagnetic metamaterial isolation layer 13 is filled with boron nitride fiber material. The boron nitride fiber material has high strength and can allow electromagnetic waves to pass through, and reflect back and forth between the electromagnetic metamaterial layer and the electromagnetic metamaterial isolation layer, with low electromagnetic wave loss. In addition, the boron nitride fiber board has good thermal conductivity, and can conduct the heat energy generated by the enhanced electric field to the bottom of the wave-transparent material layer, and the heat energy is then conducted from the wave-transparent material layer to the outside of the wave-transparent material layer, so that the heat energy can act on viruses and other microorganisms on the surface to disinfect them.

[0054] See also Figure 5 The microwave generating system 2 includes a power supply 21, a magnetron 22 and a transmission antenna 23 connected in sequence, and is used to generate and transmit high-frequency electromagnetic waves. The power supply 21 is connected to the magnetron 22 to generate high-frequency electromagnetic waves of a certain frequency. The magnetron 22 is connected to the transmission antenna 23, and the high-frequency electromagnetic waves enter the metal resonant cavity 3 through the transmission antenna 23.

[0055] The metal resonant cavity 3 is connected to the transmission antenna 23, and the electromagnetic metamaterial disinfection box 1 is arranged in the metal resonant cavity 3. The inner wall of the metal resonant cavity 3 has at least one electromagnetic metamaterial structural unit 31, which is used to gather the high-frequency electromagnetic waves generated by the microwave generating system 2 at the corresponding position in the metal resonant cavity 3.

[0056] Except for the part connected to the transmission antenna 23 , the outer surface of the metal resonant cavity 3 has an aluminum plate to prevent leakage of high-frequency electromagnetic waves, thereby concentrating the high-frequency electromagnetic waves inside the cavity of the metal resonant cavity 3 .

[0057] Example 2

[0058] See also Figure 5 A phase gradient metasurface logistics packaging disinfection device has a structure basically the same as that of Example 1, except that a bracket is provided at the bottom of the metal resonant cavity 3, a rotating platform is rotatably provided on the bracket, and an electromagnetic metamaterial disinfection box 1 is provided on the rotating platform.

[0059] In order to facilitate the placement of items into the electromagnetic metamaterial disinfection box 1, a push-pull structure is provided at the bottom of the electromagnetic metamaterial disinfection box 1. The push-pull structure includes a slide rail and a sliding door. The slide rails are provided on both sides of the bottom of the electromagnetic metamaterial disinfection box 1. One end of the push-pull plate is inserted between the two slide rails. This facilitates the placement of items that need to be isolated and protected, while also providing a sealing effect on the electromagnetic metamaterial disinfection box 1.

[0060] Example 3

[0061] The disinfection method of the logistics packaging disinfection device based on the phase gradient metasurface of Example 1 or Example 2 comprises the following steps:

[0062] S1. Start the power supply 21, connect the magnetron 22 through the power supply 21 to generate high-frequency electromagnetic waves, enter the metal resonant cavity 3 through the transmission antenna 23, and gather at the corresponding position in the metal resonant cavity 3 to generate high-frequency oscillations for surface disinfection of the electromagnetic metamaterial disinfection box 1.

[0063] S2. After that, the high-frequency electromagnetic wave passes through the wave-transmitting material layer 11, enters the electromagnetic resonance cavity 14 through the hole array 123, and then after reciprocating reflection by the electromagnetic metamaterial isolation layer 13 and the electromagnetic metamaterial layer 12, the high-frequency electromagnetic wave converges in the electromagnetic resonance cavity 14 to form a high-frequency electromagnetic field; the heat energy generated by the high-frequency electromagnetic field is transferred to the outer wall of the wave-transmitting material layer 11 through the electromagnetic metamaterial layer 12, and is used to heat up and disinfect the surface of the electromagnetic metamaterial disinfection box body 1.

[0064] At the same time, the high-frequency electromagnetic waves in the resonant cavity 14 pass through the hole array 123 and reach the outer wall of the wave-transmitting material layer 11 to perform surface disinfection on the electromagnetic metamaterial disinfection box 1 .

[0065] The disinfection method of the embodiment of the present invention can kill viruses and other microorganisms attached to the outer surface of the electromagnetic metamaterial disinfection box 1 under the action of high temperature. At the same time, the high-frequency electromagnetic waves reaching the outer surface of the electromagnetic metamaterial disinfection box 1 can also kill viruses and other microorganisms due to the high-frequency oscillations generated, thereby ensuring that the outer surface of the electromagnetic metamaterial disinfection box 1 is completely disinfected. At the same time, the shielding effect of the electromagnetic metamaterial isolation layer 13 ensures that the internal items of the electromagnetic metamaterial disinfection box 1 will not be exposed to the high-frequency electromagnetic waves.

[0066] In one of the implementations of step S1, an electromagnetic metamaterial functional layer composed of an electromagnetic metamaterial structural unit 31 is provided on the inner side of one side of the metal resonant cavity 3, and the remaining five surfaces of the metal resonant cavity 3 are respectively connected to a waveguide antenna, wherein the waveguide antenna is a transmission antenna. In this embodiment, the electromagnetic metamaterial functional layer is made of electromagnetic metamaterial based on FR4 all-dielectric, and is used to focus the high-frequency electromagnetic waves in the metal resonant cavity 3 at a specific position. When in use, the magnetron used to generate high-frequency electromagnetic waves is connected to a power divider, and the power divider divides the high-frequency electromagnetic waves into five high-frequency electromagnetic waves of the same frequency, which are respectively or sequentially passed into five waveguide antennas; the waveguide antenna feeds the high-frequency electromagnetic waves into the metal resonant cavity 3, so that the surface of the electromagnetic metamaterial disinfection box 1 corresponding to the waveguide antenna is disinfected.

[0067] In another embodiment of step S1, the inner side of the top of the metal resonant cavity 3 has an electromagnetic metamaterial functional layer composed of electromagnetic metamaterial structural units 31; one side of the metal resonant cavity 3 is connected to a waveguide antenna, wherein the waveguide antenna is a transmission antenna; the other side of the metal resonant cavity 3 has an electromagnetic metamaterial functional layer composed of electromagnetic metamaterial structural units 31. In this embodiment, the electromagnetic metamaterial functional layer is made of electromagnetic metamaterial based on FR4 all-dielectric, and is used to focus the high-frequency electromagnetic waves in the metal resonant cavity 3 at a specific position. The inner cavity of the metal resonant cavity 3 has a rotating platform for placing the electromagnetic metamaterial disinfection box 1. When in use, the magnetron generates high-frequency electromagnetic waves, which are passed into the waveguide antenna and fed into the metal resonant cavity 3. Under the action of the electromagnetic metamaterial functional layer in the metal resonant cavity 3, the high-frequency electromagnetic waves are gathered on the electromagnetic metamaterial disinfection box 1 on the rotating platform, thereby disinfecting the surface of the electromagnetic metamaterial disinfection box 1.

[0068] The above-mentioned disinfection method is described in detail below.

[0069] A solid-state microwave source with an output power of 0 to 1000W and a frequency of 2450MHz is used to generate a high-frequency electromagnetic wave of 2450MHz. After the high-frequency electromagnetic wave enters the metal resonant cavity 3, it forms a uniformly distributed plane wave. The high-frequency electromagnetic wave contacts the outer surface of the electromagnetic metamaterial disinfection box 1, enters the wave-transmitting material layer 11, and is repeatedly reflected in the electromagnetic resonant cavity 14. The electric field is enhanced and heat energy is generated. The data are as follows:

[0070] The electric field strength in the electromagnetic resonance cavity 14 is about five times that in the metal resonance cavity 3. When the power is 100W, the electric field in the electromagnetic resonance cavity 14 is enhanced, and it takes about 5 to 6 minutes for the outer surface temperature of the wave-transmitting material layer 11 to reach 115 to 120°C, which can disinfect most viruses and other microorganisms; when the power is 200W, the time is shortened to about 3 to 4 minutes.

[0071] When the power is 100W, the solid-state microwave source can output 7000J of energy within 70s, and the electric field strength in the metal resonant cavity 3 is about 10000V / m. The high-frequency electromagnetic wave acts on 5mL of bacterial liquid on the surface of the electromagnetic metamaterial disinfection box 1, and the energy required is about 1157J; the energy required to disinfect 30L of bacterial liquid on the surface is about 1590J. Therefore, the microwaves generated by the solid-state microwave source with a power of 100W to 200W can almost completely disinfect the surface of the electromagnetic metamaterial disinfection box 1, which provides a guarantee for the complete disinfection of the outer surface of the electromagnetic metamaterial disinfection box 1.

[0072] The general sterilization temperature is 115℃~120℃, and the conventional method takes 40 to 60 minutes. At the same temperature, it only takes 2 to 6 minutes to perform high-frequency electromagnetic wave sterilization using the sterilization method of the embodiment of the present invention. This shows that the sterilization method provided by the embodiment of the present invention can significantly shorten the sterilization time, and the air temperature rise is very small, and the energy required for air heating can be ignored.

[0073] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A phase gradient metasurface logistics packaging disinfection device, comprising an electromagnetic metamaterial disinfection box (1), wherein the electromagnetic metamaterial disinfection box (1) has a plurality of electromagnetic metamaterial disinfection units, characterized in that: Each of the electromagnetic metamaterial disinfecting units comprises: A wave-transmitting material layer (11); an electromagnetic metamaterial layer (12), attached to one side of the wave-transmitting material layer (11), wherein a hole array (123) is arranged on the electromagnetic metamaterial layer (12); and An electromagnetic metamaterial isolation layer (13) is arranged on one side of the electromagnetic metamaterial layer (12), and an electromagnetic resonance cavity (14) is formed between the electromagnetic metamaterial isolation layer and the electromagnetic metamaterial layer (12); As the high-frequency electromagnetic wave passes through the wave-transmitting material layer (11) and enters the electromagnetic resonance cavity (14) through the hole array (123), after being reciprocated by the electromagnetic metamaterial isolation layer (13) and the electromagnetic metamaterial layer (12), the high-frequency electromagnetic wave converges in the electromagnetic resonance cavity (14) to form a high-frequency electromagnetic field, which is used to heat and disinfect the outer wall of the wave-transmitting material layer (11); It also includes: a microwave generating system (2), including a power source (21), a magnetron (22) and a transmission antenna (23) connected in sequence, and used for generating and transmitting high-frequency electromagnetic waves; A metal resonant cavity (3) connected to the transmission antenna (23), the electromagnetic metamaterial disinfection box (1) being arranged in the metal resonant cavity (3), and at least one electromagnetic metamaterial structural unit (31) being provided on the inner wall of the metal resonant cavity (3) for gathering the high-frequency electromagnetic waves generated by the microwave generating system (2) at corresponding positions in the metal resonant cavity (3).

2. The phase gradient metasurface logistics packaging disinfection device according to claim 1 is characterized in that: The wave-transmitting material layer (11) is composed of a zirconium-containing aluminum silicate fiberboard.

3. The phase gradient metasurface logistics packaging disinfection device according to claim 2 is characterized in that: The zirconium-containing aluminum silicate fiberboard is a honeycomb zirconium-containing aluminum silicate fiberboard.

4. The phase gradient metasurface logistics packaging disinfection device according to claim 1 is characterized in that: The electromagnetic metamaterial layer (12) comprises a first metal plate (121) and a first dielectric substrate (122) which are connected in sequence, and the first metal plate (121) is arranged on a side of the electromagnetic metamaterial layer (12) that is attached to the wave-transmitting material layer (11).

5. The phase gradient metasurface logistics packaging disinfection device according to claim 1 is characterized in that: The electromagnetic metamaterial isolation layer (13) comprises a metal resonance unit (131), a second dielectric substrate (132) and a second metal plate (133) which are connected in sequence; the metal resonance unit (131) is arranged on a side of the second dielectric substrate (132) facing the electromagnetic resonance cavity (14); and the second metal plate (133) is attached to the other side of the second dielectric substrate (132).

6. The phase gradient metasurface logistics packaging disinfection device according to claim 5 is characterized in that: The metal resonance unit (131) is a square metal coating, and the metal resonance unit (131) can be used to adjust the phase of high-frequency electromagnetic waves and reflect the high-frequency electromagnetic waves.

7. The phase gradient metasurface logistics packaging disinfection device according to claim 1 is characterized in that: The electromagnetic resonance cavity (14) is filled with boron nitride fiber material.

8. The phase gradient metasurface logistics packaging disinfection device according to claim 1 is characterized in that: The distance between the electromagnetic metamaterial layer (12) and the electromagnetic metamaterial isolation layer (13) is 106 to 116 mm.

9. A method for disinfecting a logistics packaging disinfection device using a phase gradient metasurface according to claim 1, characterized in that: The following steps are involved: Starting the power supply (21), connecting the power supply (21) to the magnetron (22) to generate high-frequency electromagnetic waves, which enter the metal resonant cavity (3) through the transmission antenna (23) and gather at corresponding positions in the metal resonant cavity (3) to generate high-frequency oscillations; Afterwards, the high-frequency electromagnetic wave passes through the wave-transmitting material layer (11), enters the electromagnetic resonance cavity (14) through the hole array (123), and then after reciprocating reflection by the electromagnetic metamaterial isolation layer (13) and the electromagnetic metamaterial layer (12), the high-frequency electromagnetic wave converges in the electromagnetic resonance cavity (14) to form a high-frequency electromagnetic field; The heat energy generated by the high-frequency electromagnetic field is transferred to the outer wall of the wave-transmitting material layer (11) through the electromagnetic metamaterial layer (12), so as to heat up and disinfect the surface of the electromagnetic metamaterial disinfection box (1); At the same time, the high-frequency electromagnetic waves in the resonant cavity (14) pass through the hole array (123) and reach the outer wall of the wave-transmitting material layer (11), and are used to perform surface disinfection on the electromagnetic metamaterial disinfection box (1).

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