A multi-energy field coupled fully automatic six-sided disinfection device for cold chain cargo transportation

Abstract

The present invention discloses a multi-energy field coupled fully automatic six-sided disinfection device for the cold chain cargo transportation process, the device includes a frame, a roller transmission mechanism, a strong cyclone atomization multi-nozzle integrated spray system, an ultraviolet catalytic coupled disinfection component, a cyclone airflow internal circulation system, a waste liquid filtration and recovery device, a protective curtain, and an external liquid storage tank; its multi-energy field coupling is a comprehensive integration of three disinfection methods: chemical, ultraviolet and photocatalytic, to achieve disinfection and inactivation of microorganisms, etc.; the ultraviolet light and photocatalysis of the ultraviolet catalytic coupled disinfection component enhance the disinfection ability of chemical disinfectant solution at low temperature, and at the same time, ultraviolet light and photocatalysis themselves have disinfection ability. They are superimposed with chemical spray disinfection, ultraviolet disinfection and photocatalytic disinfection, effectively reducing the use of chemical disinfectant solution, and achieving efficient, dead angle-free, green and low-cost disinfection.

Description

Technical Field

[0001] The present invention relates to the technical field of disinfection equipment, and in particular to a multi-energy field coupled fully automatic six-sided disinfection device for cold chain cargo transportation. Background Art

[0002] Since the outbreak of the COVID-19 pandemic, it has significantly impacted people's daily lives and production. Tracing the source of the pandemic indicates that imported cold chain goods, carrying the novel coronavirus, are a significant source of its spread. To effectively address the spread of the pandemic caused by imported cold chain goods, while strengthening the protection of cold chain workers and strictly enforcing epidemic prevention regulations, improving the automation of containerized cold chain cargo loading, unloading, disinfection, and transshipment operations, and reducing the number of cold chain workers are crucial to improving COVID-19 prevention and control efforts and ensuring stable social and economic operations.

[0003] Traditionally, cold chain cargo disinfection is accomplished by manual spraying, wiping, or soaking in disinfectant. This leads to high labor intensity, low disinfection efficiency, severe disinfectant residue and contamination, uneven and inadequate disinfection, and a high risk of human exposure and infection. Therefore, reducing operator contact and environmental pollution during cold chain cargo transportation, while increasing the degree of automation, has become a bottleneck in achieving automated, efficient, and low-pollution cold chain cargo disinfection.

[0004] In the existing literature and patent searches, the research on the automatic six-sided disinfection device and method for goods is not mature enough, and there is a lack of research on the automatic six-sided multi-energy field coupling disinfection method for cold chain goods. Xiamen University proposed a deep ultraviolet-based all-round disinfection device for cold chain goods (CN 113117106 A), which uses a deep ultraviolet light source array arranged on the four sides of the top, bottom, left and right to achieve ultraviolet light sterilization and disinfection. However, since ultraviolet lamps cannot be arranged in the front and back of the direction of movement of the goods and multiple conveyor belts are used for connection, it is not conducive to the six-sided all-round disinfection of the goods and has a certain disinfecting angle for disinfection; Zhishan Times Intelligent Technology (Beijing) Co., Ltd. proposed a UV disinfection device suitable for cold chain goods (CN 214318650U), which uses ultraviolet light for disinfection. Since there is no protective curtain, there is a situation where ultraviolet light overflows and causes light pollution; Rongcheng Huarong Technology Service Co., Ltd. proposed a cold chain disinfection machine (CN 114377177 A) Disinfection operations are carried out by using disinfectant plus atomizing nozzles. Since sprockets and conveyor chains are used to directly transport goods and the main frame is in direct contact with the disinfection operation space, although the frame material is 304 stainless steel, it does not take into account that most disinfectants contain chloride ions. The corrosion and rust of the transmission assembly and the main frame will be very serious, and the service life is very limited; Dalian Port Yidu Cold Chain Co., Ltd. proposed a cargo disinfection equipment (CN 215386144 U), which uses a nozzle to spray disinfectant for disinfection operations. Since the nozzle is only fixed on the four sides of the top, bottom, left and right, it is difficult to achieve all-round disinfection; Xiamen Hejian Health Technology Service Co., Ltd. proposed an electric cold chain outer packaging multi-dimensional disinfection equipment (CN 214421476 U), which uses a gas-liquid atomizing spray disinfectant for disinfection operations. The disinfection mode is single and has certain limitations.

[0005] In summary, the six-sided automated multi-energy field coupled disinfection method for cold chain goods is not yet mature, and the existing disinfection equipment has different problems, which restricts the safe transportation of cold chain goods. Summary of the Invention

[0006] To address the shortcomings of the aforementioned prior art, the present invention provides a fully automatic six-sided disinfection device for cold chain cargo transportation using a multi-energy field coupling system. This multi-energy field coupling system integrates chemical, ultraviolet, and photocatalytic disinfection methods. The technical solution of the present invention is as follows:

[0007] The multi-energy field coupled fully automatic six-sided disinfection device for the cold chain cargo transportation process includes a frame, a roller transmission mechanism, a powerful cyclone atomization multi-nozzle integrated spray system, an ultraviolet catalytic coupling disinfection component, a cyclone airflow internal circulation system, a waste liquid filtration and recovery device, a protective curtain, and an external liquid storage tank;

[0008] The rack includes a frame, a pipeline box, an electric control box, and an inlet and outlet side cover; the frame and the protective curtain form a disinfection area; the pipeline box and the electric control box are arranged on the outer side of the frame;

[0009] The roller transmission mechanism includes a chain roller frame, a speed regulating motor and an anti-corrosion roller group, which are fixedly mounted on the frame of the frame through the chain roller frame; the speed regulating motor and the anti-corrosion roller group are mounted on the chain roller frame;

[0010] The powerful cyclone atomization multi-nozzle integrated liquid spraying system includes a powerful fan, a cyclone atomization unit, a spray unit, an air duct assembly, a water pipe assembly, a liquid medicine tank and a fan box, which are installed on the frame of the rack;

[0011] The ultraviolet photocatalytic coupling disinfection component includes an ultraviolet lamp group, a waterproof terminal, a photocatalytic substrate and a photocatalyst coating, and the photocatalytic substrate is dispersedly installed inside the frame.

[0012] In the technical solution described above, in a more preferred case, the powerful fan is installed inside the fan box and connected to the air duct assembly through the air inlet and air outlet of the fan box;

[0013] In the technical solution described above, in a more preferred case, the cyclone atomization unit includes a radial cyclone blade ring, a central liquid spray pipe and an air inlet channel; the spray unit includes a spray head and a spray pipeline, which are installed inside the frame;

[0014] In the technical solution described above, in a more preferred case, the cyclone atomization units are generally arranged in 6 groups, and the number of nozzles in each group of spray units is 1-3; the air duct assembly includes an air duct distributor and an air volume regulating valve; the water pipe assembly includes a filter, a booster pump, a water pipe distributor and a flow regulating valve; the fan box is connected to the air inlet of the powerful fan through multiple different chambers;

[0015] In the technical solution described above, in a more preferred case, the UV lamp group includes a plurality of UV lamp tubes, which are fixedly installed above the photocatalytic substrate coated with the photocatalyst coating, and the installation distance D (unit: mm) satisfies the formula R dg +2.5≤D≤D max , where R dg is the radius of the UV lamp, D max To meet the requirements of UV lamps for the surface illumination intensity of goods to be 2000 (μω / cm 2 ) above the maximum distance;

[0016] In the technical solution described above, in a more preferred case, the ultraviolet lamp can emit C-segment ultraviolet light with a wavelength of 190nm to 290nm; the waterproof terminal is provided at the connection points at both ends of the ultraviolet lamp group; the ultraviolet catalytic coupling disinfection component is generally provided in 4 groups, with 1-3 components in each group;

[0017] For the technical solution described above, in a more preferred case, the cyclone airflow internal circulation channel includes two front and rear side vents, an upper air connection port, and an internal circulation pipeline. The side vents and the air outlet of the fan box are connected to the air outlet of the powerful fan through the internal circulation pipeline. The upper air connection port is connected to the air inlet of the fan box, and multiple different chambers of the fan box are connected to the air inlet of the powerful fan.

[0018] In the technical solution described above, in a more preferred embodiment, the waste liquid filtering and recovery device includes a waste liquid receiving tank, a multi-layer filter screen assembly, and a waste liquid tank, which are fixedly mounted at the bottom of the frame, and the multi-layer filter screen assembly is mounted between the waste liquid receiving tank and the waste liquid tank; the waste liquid tank is connected to the liquid medicine tank via a pipeline; the multi-layer filter screen assembly is manufactured by stacking filters with different mesh sizes;

[0019] In the technical solution described above, in a more preferred case, the protective curtain is a double-layer curtain structure, fixedly installed on the inner wall of the entrance and exit side cover;

[0020] In the technical solution described above, in a more preferred case, the external liquid storage tank is connected to the liquid medicine tank via a pipeline;

[0021] For the technical solution described above, in a more preferred case, the disinfection device also includes a PLC system, and the hardware part of the PLC system is arranged in the electrical control box, including electrical components such as a touch screen, a button switch, an audible and visual indicator light, and a driver; the PLC system is electrically connected to the speed regulating motor, the powerful fan and the booster pump.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention achieves the disinfection and inactivation of viruses, microorganisms, etc. through the synergistic effect of chemical spray disinfection, ultraviolet disinfection and photocatalytic disinfection. The ultraviolet light and photocatalysis of the ultraviolet-photocatalytic coupled disinfection component enhance the disinfection ability of the chemical disinfectant solution at low temperatures (-1°C to -80°C). At the same time, ultraviolet light and photocatalysis themselves have disinfection capabilities. They are superimposed on the chemical spray disinfection, ultraviolet disinfection and photocatalytic disinfection, effectively reducing the use of chemical disinfectant solution and achieving efficient, dead-angle-free, green and low-cost disinfection.

[0024] 2. The powerful cyclone atomization multi-nozzle integrated spray system of the present invention adopts a gas-liquid mixing method to atomize and spray the chemical liquid. The radial wind is converted into rotating wind through the air inlet channel and the radial cyclone blade ring to act on the liquid, breaking up the liquid into atomized wind, effectively preventing the nozzle from clogging. The powerful fan and the multi-chamber fan box are connected to achieve balanced pressurization at the negative pressure inlet of the powerful fan and form a cyclonic airflow internal circulation, ensuring stable air pressure in the closed disinfection area.

[0025] 3. The chemical spray disinfection of the present invention is achieved by atomizing spraying of multiple groups of nozzles in six directions. Through the reasonable layout of multiple groups of nozzles and manual adjustment of the angles of the nozzles, all-round and dead-angle-free disinfection of cold chain goods in the transportation process can be achieved; the output water pressure and wind speed can be adjusted according to the position of the nozzles, so that the atomized liquid can be sprayed more evenly, reasonably and effectively on the six outer surfaces of the cold chain goods.

[0026] 4. The ultraviolet photocatalytic coupling disinfection component of the present invention adopts double-layer sealing on both sides + plastic tube clamp + lamp protection cover to improve the waterproof level of the ultraviolet lamp and solve the leakage problem of the ultraviolet lamp used for photocatalysis in a humid environment.

[0027] The multi-energy field coupled fully automatic six-sided disinfection device for cold chain cargo transportation described in the present invention has been evaluated for disinfection effect by the Dalian Center for Disease Control and Prevention. The evaluation results show that for four low-temperature stored samples, a disinfectant containing effective ingredients such as sodium dichloroisocyanurate and quaternary ammonium salt is used, and the disinfection equipment developed by Dalian University of Technology is used. At the specified cargo conveying speed, the disinfection effect meets the requirements of the "WS / T774-2021 On-site Disinfection Evaluation Standard during the New Coronavirus Pneumonia Epidemic". BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the appearance of the present invention.

[0029] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0030] Figure 3 This is a schematic diagram of the multi-energy field coupling disinfection principle of the present invention

[0031] Figure 4 This is a schematic diagram of the powerful cyclone atomization multi-nozzle integrated spray system of the present invention

[0032] Figure 5 This is a schematic diagram of the ultraviolet catalytic coupling disinfection component of the present invention

[0033] Figure 6 This is a schematic diagram of the cyclone airflow internal circulation system of the present invention

[0034] Figure 7This is a schematic diagram of the waste liquid filtration and recovery device of the present invention

[0035] Among them, 1. Frame; 2. Roller transmission mechanism; 3. Powerful cyclone atomization multi-nozzle integrated spray system; 4. Ultraviolet catalytic coupling disinfection component; 5. Cyclone airflow internal circulation system; 6. Waste liquid filtration and recovery device; 7. Protective curtain; 8. External liquid storage tank; 101. Frame; 102. Pipe box; 103. Electric control box; 104. Inlet and outlet side cover; 105. Universal wheel; 201. Chain roller frame; 202. Speed regulating motor; 203. Anti-corrosion roller group; 301. Powerful fan; 302. Cyclone atomization unit; 303. Spray unit; 304. Air duct assembly; 305. Water pipe assembly; 306. Liquid tank; 307. Fan box; 302 1. Radial cyclone blade ring; 3022. Central liquid spray pipe; 3023. Air inlet channel; 3031. Nozzle; 3032. Spray pipe; 3041. Duct distributor; 3042. Air volume control valve; 3051. Filter; 3052. Booster pump; 3053. Water pipe distributor; 3054. Flow control valve; 401. UV lamp assembly; 402. Waterproof terminal block; 403. Photocatalytic substrate; 404. Photocatalyst coating; 4011. UV lamp; 501. Ventilation port; 502. Upper air inlet port; 503. Internal circulation pipe; 601. Waste liquid collection tank; 602. Multi-layer filter assembly; 603. Waste liquid tank; DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the technical solutions and accompanying drawings.

[0037] like Figure 1-Figure 7 As shown, a multi-energy field coupled fully automatic six-sided disinfection device for cold chain cargo transportation includes a frame 1, a roller transmission mechanism 2, a powerful cyclone atomization multi-nozzle integrated spray system 3, an ultraviolet light catalytic coupling disinfection component 4, a cyclone airflow internal circulation system 5, a waste liquid filtration and recovery device 6, a protective curtain 7, and an external liquid storage tank 8;

[0038] The frame 1 includes a frame 101, a pipeline box 102, an electrical control box 103, an inlet and outlet side cover 104 and a universal wheel 105; the frame 101 is a metal welded structure, which is sprayed with plastic for anti-corrosion and anti-rust treatment after welding, and the inner side is welded with PVC plates for secondary protection, forming a closed disinfection area with the protective curtain 7, ensuring that the roller transmission mechanism 2 is separated from the disinfection area, realizing the corrosion and rust prevention of the roller transmission mechanism 2 and the fixed installation of other components; the pipeline box 102 and the electrical control box 103 are arranged on the outer side of the frame 101; the universal wheel 105 is installed at the bottom of the frame 101 for short-distance transportation and fixation of the entire equipment;

[0039] The roller transmission mechanism 2 includes a chain roller frame 201, a speed regulating motor 202 and an anti-corrosion roller group 203, which are fixedly mounted on the frame 101 of the frame 1 through the chain roller frame 201; the speed regulating motor 202 and the anti-corrosion roller group 203 are mounted on the chain roller frame 201 to realize the transmission of cold chain goods on the anti-corrosion roller group 203, further ensuring that the metal parts of the roller transmission mechanism 2 have no contact with the disinfection area, thereby achieving anti-corrosion and rust prevention;

[0040] The powerful cyclone atomization multi-nozzle integrated spray system 3 includes a powerful fan 301, a cyclone atomization unit 302, a spray unit 303, an air duct assembly 304, a water pipe assembly 305, a liquid medicine tank 306 and a fan box 307, which are installed on the frame 101 of the rack 1; the powerful fan 301 is installed inside the fan box 307 and is connected to the air duct assembly 304 through the air inlet and air outlet of the fan box 307; the cyclone atomization unit 302 includes a radial cyclone The fan ring 3021, the central liquid spray pipe 3022 and the air inlet channel 3023 convert the output of the powerful fan 301 from radial wind to rotating wind through the radial cyclone blade ring 3021, and the liquid medicine output from the central liquid spray pipe 3022 is dispersed and atomized; the spray unit 303 includes a nozzle 3031 and a spray pipe 3032, with a total of 6 groups, and the number of nozzles 3031 in each group of spray units 303 is 1-3, which are respectively installed in the PVC protective cover inside the frame 101. The six parts of the inner side wall around the front half of the plate are arranged facing each other and the angles can be manually adjusted to ensure that the atomized liquid from the nozzles 3031 in the six parts can fully cover the six sides of the cold chain goods; the air duct assembly 304 includes an air duct distributor 3041 and an air volume regulating valve 3042, which adjusts the air volume of each air inlet channel 3023 according to the position of the nozzle 3031, and more reasonably distributes the output of the powerful fan 301 to the cyclone atomization units 302 at different positions; the water pipe assembly 305 includes a filter 3051, a booster pump 3052, a water pipe distributor 3053 and a flow regulating valve 3054, which respectively realize the filtration, pressurization and pipeline distribution of the liquid, and adjust the flow rate of each spray pipeline 3032 according to the position of the nozzle 3031; the fan box 307 is connected to the air inlet of the powerful fan 301 through multiple different chambers, so as to realize balanced pressurization when the powerful fan 301 takes in air, thereby ensuring pressure balance in the disinfection area;

[0041] The ultraviolet catalytic coupling disinfection component 4 includes an ultraviolet lamp group 401, a waterproof terminal 402, a photocatalytic substrate 403 and a photocatalyst coating 404, with a total of 4 groups, each group having 1-3 photocatalytic substrates 403. The photocatalytic substrates 403 are respectively installed on the inner side walls of the rear half of the PVC protective plate inside the frame 101 and arranged facing each other; the ultraviolet lamp group 401 includes 3 ultraviolet lamp tubes 4011, which are fixedly installed above the photocatalytic substrate 403 coated with the photocatalyst coating 404, and the installation distance D (unit: mm) satisfies the formula Rdg +2.5≤D≤D max , where R dg is the radius of the UV lamp, D max To meet the requirements of UV lamps for the surface illumination intensity of goods to be 2000 (μω / cm 2 ) above the maximum distance; the ultraviolet lamp 4011 can emit C-segment ultraviolet light with a wavelength of 190nm to 290nm to achieve ultraviolet disinfection; the photocatalyst coating 404 can generate active oxygen species (including · O2 – 、H2O2、·OH and 1 O2, etc.), to achieve degradation and disinfection effects; the waterproof terminal 402 is set at the connection points at both ends of the ultraviolet lamp group 401, and after the ultraviolet lamp tube 4011 is connected, a non-conductive and corrosion-resistant glue is used for secondary sealing protection to protect the ultraviolet lamp tube 4011 from the influence of the atomized liquid;

[0042] The cyclone airflow internal circulation channel 5 includes two front and rear side vents 501, an upper air connection port 502, and an internal circulation pipeline 503. The side vents 501 and the air outlet of the fan box 307 are connected to the air outlet of the powerful fan 301 through the internal circulation pipeline 503, and the upper air connection port 502 is connected to the air inlet of the fan box 307. The air is connected to the air inlet of the powerful fan 301 through multiple different chambers of the fan box 307, thereby forming an internal circulation of the airflow in the closed disinfection area.

[0043] The waste liquid filtering and recovery device 6 includes a waste liquid receiving tank 601, a multi-layer filter screen assembly 602, and a waste liquid tank 603, which are fixedly mounted at the bottom of the frame 101, and the multi-layer filter screen assembly 602 is mounted between the waste liquid receiving tank 601 and the waste liquid tank 603; the waste liquid receiving tank 601 and the waste liquid tank 603 are welded PVC board structures for storing waste liquid; the waste liquid tank 603 is connected to the liquid medicine tank 306 via a pipeline. When there is no liquid medicine in the external liquid storage tank 8, the filtered waste liquid is recovered to the liquid medicine tank 306 for spray disinfection; the multi-layer filter screen assembly 602 is manufactured by laminating filters with different mesh sizes and can be regularly removed, rinsed, and reused;

[0044] The protective curtain 7 is a double-layer rubber curtain structure, which is fixed by clamping with PVC plates. The two sets of protective curtains 7 are respectively fixed on the inner wall of the entrance and exit side cover 104, forming a closed disinfection area with the frame 101 of the rack 1, which is used to block the leakage of ultraviolet light and prevent the leakage of atomized liquid medicine, which may cause pollution to the environment.

[0045] The external liquid storage tank 8 is connected to the liquid medicine tank 306 via a pipeline for replenishing the disinfectant liquid;

[0046] Furthermore, the disinfection device also includes a PLC system. The hardware part of the PLC system is arranged in the electrical control box 103, including electrical components such as a touch screen, a button switch, an audible and visual indicator light, and a driver. The PLC system is electrically connected to the speed regulating motor 202, the powerful fan 301, and the booster pump 305 to realize the liquid inlet and discharge control, the air volume control of the powerful fan 301, and the conveying speed control of the roller transmission mechanism 2.

[0047] For ease of understanding, the specific operation process of this embodiment is given:

[0048] A. After the PLC system of the fully automatic six-sided disinfection equipment is started, the UV lamp group 401 and the powerful fan 301 are started in sequence through the touch screen, and the liquid tank 306 is controlled to start absorbing the liquid from the external liquid storage tank 8. The transmission speed and the amount of liquid sprayed are set, and the preparation work is completed;

[0049] B. In the first half of the transportation process of the cold chain goods into the closed disinfection area by the roller transmission mechanism 2, the cyclone atomization liquid generated by the powerful cyclone atomization multi-nozzle integrated spray system 3 is sprayed and disinfected on the six sides of the cold chain goods at the same time through its multiple groups of nozzles 3031 in six directions; the amount of sprayed chemical can be regulated by the pipeline distribution valve, and the regulation range is 1.0ml / s to 50ml / s.

[0050] C. Then the cold chain goods enter the second half of the enclosed disinfection area, and the photocatalyst coating 404 of the ultraviolet catalytic coupling disinfection component 4 in the four directions of up, down, left and right produces active oxygen species (including · O2 – 、H2O2、 · OH and 1 O2, etc.), superimposed and coupled with the 254nm ultraviolet disinfection capability of segment C, further conducts secondary physical disinfection on the surface of cold chain goods sprayed with liquid medicine. The cold chain goods are subjected to six-sided strong atomization spraying of chemical liquid, strong irradiation of ultraviolet light, and photocatalytic coupling to enhance the disinfection of multi-energy field coupling. The bacteria and viruses on the surface of the cold chain goods can be effectively and powerfully disinfected, and the goods leave the enclosed disinfection area after the disinfection is completed;

[0051] D. The liquid medicine after atomized spraying enters the waste liquid tank through the waste liquid receiving tank 601 and the multi-layer filter screen assembly 602, and the disinfection operation is completed.

[0052] Example 1

[0053] According to the characteristics of the present invention, a fully automatic six-sided disinfection device with multi-energy field coupling for the cold chain cargo transportation process is assembled. The chassis 1 is 2450mm long, the effective width of the roller is 600mm, the height is 750mm, and the length is 2400mm. Two layers of protective curtains are installed at intervals of 300mm in the front, and 12 cyclone nozzles are installed in six directions (up, down, left, right, front and back) in the front half of 800mm, with 2 nozzles evenly distributed in each direction; two pieces of ultraviolet light and photocatalytic coupling disinfection components are installed in each of the four directions (up, down, left and right) in the back half of 1000mm, and two layers of protective curtains are installed at intervals of 300mm in the back. Each component of the UV light plus photocatalytic coupling disinfection component has three 40w UV lamps, the diameter of the UV lamp is 28mm, the installation distance D=16mm, the photocatalytic substrate is 200mm*1000mm, and each photocatalytic substrate is installed with three 40-watt UV lamps with a wavelength of 254nm; the minimum UV intensity in six directions of the cold chain items is 2000μω / cm 2 The flow rate of atomized liquid sprayed by each nozzle is adjustable from 0.5ml / s to 5ml / s, and the transmission speed of the roller is 0.2m / s.

[0054] The bacterial slices for the experiment were prepared according to GB / T38502 (tryptone soy broth was used as an organic interfering substance when evaluating the effect of low-temperature on-site disinfection). The number of recovered bacteria per Escherichia coli (8099) bacterial slice was 2.41×10 6 CFU / plate, Staphylococcus aureus (ATCC6538) 2.59×10 6 CFU / slice, and use cloth pieces (1cm×1cm) as the carrier for infection. Before disinfection, adhere the bacterial strips to the surface of the carton according to the spotting requirements. Each carton measures 50cm*30cm*20cm. Depending on the size of the carton, the spots should be placed at 5 points on each of the top and bottom, 2 points on one side, and 1 point on three sides. Arrange 15 spots on the six sides of the carton, with two bacterial strips at each point. Use a low-temperature dichloroisocyanuric acid disinfectant (3000mg / L) and let it sit for 10 minutes after disinfection.

[0055] To evaluate the disinfection effect, use sterile tweezers to transfer the bacterial slice into a test tube containing 5.0mL of the corresponding neutralizer, vibrate 80 times in the palm of your hand or mix with a mixer, neutralize for 10 minutes, and set up a positive control group at the same time. During low-temperature on-site disinfection, the positive control group is placed in the corresponding low-temperature environment together with the test group. After reaching the same low temperature, they are placed in the diluent for counting. Oscillate the sampling tube on the mixer for 20 seconds or vibrate 80 times vigorously, draw 1.0mL of the sample to be tested and inoculate it into a sterile plate. Inoculate two plates in parallel for each sample, add 15-18mL of dissolved 45-48℃ culture medium (corresponding culture medium), pour and shake, wait for the agar to solidify, and culture at 36℃±1℃ for 48 hours (special indicator microorganisms, culture according to corresponding requirements), count the number of colonies, and calculate the kill rate.

[0056]

[0057] Where:

[0058] X—killing rate (%);

[0059] A—Bacterial count before disinfection or recovered bacterial count in the positive control group (CFU / sample);

[0060] B—Bacterial count after disinfection or bacterial count recovered in the test group (CFU / sample).

[0061] Escherichia coli (8099) microbial killing experiment, the multi-energy field coupled fully automatic six-sided disinfection device in the cold chain cargo transportation process runs at a speed of 0.2m / s, and the chemical disinfection amount of the surface of the cold chain cargo (-18℃) carton (50cm*30cm*20cm) sprayed with the sun is 45g, with an average unit area of 72.6g / m 2 , 15 points, 30 bacterial slices; Escherichia coli killing rate ≥ 99.9%, 30 samples, and a qualified rate of 100%.

[0062] In the microbial killing experiment of Staphylococcus aureus (ATCC6538), the multi-energy field coupled fully automatic six-sided disinfection device in the cold chain cargo transportation process ran at a speed of 0.15m / s. The chemical disinfection amount sprayed on the surface of the cold chain cargo (-18℃) was 45g, with an average unit area of 72.6g / m 2 , 15 points, 30 bacterial slices; exposure time 10 minutes, Staphylococcus aureus kill rate ≥ 99.9%, 30 samples, pass rate 100%. Complies with the requirements of "WS / T-774-2021 Standard for On-site Disinfection Evaluation During the COVID-19 Epidemic."

[0063] Example 2-18

[0064] The operating conditions were the same as those in Example 1, the parameter changes were as shown in Tables 1 and 2, and the test results were as shown in Table 3.

[0065] Table 1

[0066]

[0067]

[0068] Table 2

[0069]

[0070] Table 3

[0071]

[0072]

[0073] Comparative Examples 1-10

[0074] The implementation operation is the same as that of the embodiment, except that one of the means of chemical disinfection, ultraviolet and photocatalytic coupled disinfection is missing. The parameter changes are shown in Tables 4 and 5, and the test results are shown in Table 6.

[0075] Table 4

[0076]

[0077]

[0078] Table 5

[0079]

[0080] Table 6

[0081]

[0082] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A multi-energy field coupled fully automatic six-sided disinfection device for cold chain cargo transportation, characterized by: The device comprises a frame (1), a roller transmission mechanism (2), a powerful cyclone atomization multi-nozzle integrated liquid spraying system (3), an ultraviolet catalytic coupling disinfection component (4), a cyclone airflow internal circulation system (5), a waste liquid filtering and recovery device (6), a protective curtain (7), and an external liquid storage tank (8); The frame (1) comprises a frame (101), a pipeline box (102), an electric control box (103), and an inlet and outlet side cover (104); the frame (101) and the protective curtain (7) form a disinfection area; the pipeline box (102) and the electric control box (103) are arranged on the outer side of the frame (101); The roller transmission mechanism (2) comprises a chain roller frame (201), a speed regulating motor (202) and an anti-corrosion roller group (203), and is fixedly mounted on the frame (101) of the machine frame (1) via the chain roller frame (201); the speed regulating motor (202) and the anti-corrosion roller group (203) are mounted on the chain roller frame (201); The powerful cyclone atomization multi-nozzle integrated liquid spraying system (3) comprises a powerful fan (301), a cyclone atomization unit (302), a spray unit (303), an air duct assembly (304), a water pipe assembly (305), a liquid medicine tank (306) and a fan box (307), which are installed on the frame (101) of the rack (1); The ultraviolet catalytic coupling disinfection component (4) comprises an ultraviolet lamp group (401), a waterproof terminal (402), a photocatalytic substrate (403) and a photocatalyst coating (404), wherein the photocatalytic substrate (403) is dispersedly installed inside the frame (101); The ultraviolet lamp assembly (401) includes a plurality of ultraviolet lamp tubes (4011), which are fixedly mounted above a photocatalytic substrate (403) coated with a photocatalyst coating (404), with a mounting distance D in mm satisfying the formula R dg +2.5≤D≤D max , where R dg is the radius of the UV lamp, D max To meet the requirements of UV lamps for the surface illumination intensity of goods to be 2000 (μω / cm 2 ) above the maximum distance; so that the synergistic killing rate of chemical spray disinfection, ultraviolet disinfection and photocatalytic disinfection is ≥ 99.9%; The ultraviolet lamp tube (4011) emits ultraviolet light of segment C with a wavelength of 190nm to 290nm; the waterproof connection terminals (402) are arranged at the connection points at both ends of the ultraviolet lamp assembly (401); The radial cyclone blade ring (3021) of the powerful cyclone atomizing multi-nozzle integrated liquid spraying system (3) converts radial wind into rotating wind, and cooperates with the multi-chamber design of the fan box (307) to form an air pressure balance system.

2. The device according to claim 1, characterized in that: The powerful fan (301) is installed inside the fan box (307) and is connected to the air duct assembly (304) through the air inlet and air outlet of the fan box (307).

3. The device according to claim 1, characterized in that: The cyclone atomization unit (302) comprises a radial cyclone blade ring (3021), a central liquid spray pipe (3022) and an air inlet channel (3023); the spray unit (303) comprises a spray head (3031) and a spray pipeline (3032), and is installed inside the frame (101).

4. The device according to claim 1, characterized in that: The cyclone atomization units (302) are generally arranged in 6 groups, and the number of nozzles (3031) of each group of spray units (303) is 1-3; the air duct assembly (304) includes an air duct distributor (3041) and an air volume regulating valve (3042); the water pipe assembly (305) includes a filter (3051), a booster pump (3052), a water pipe distributor (3053) and a flow regulating valve (3054); the fan box (307) is provided with a plurality of different chambers and is connected to the air inlet of the powerful fan (301).

5. The device according to claim 1, characterized in that: The cyclonic airflow internal circulation channel (5) comprises two front and rear side vents (501), an upper air connection port (502) and an internal circulation pipeline (503); the side vents (501), the air outlet of the fan box (307) and the air outlet of the powerful fan (301) are connected through the internal circulation pipeline (503), and the upper air connection port (502) is connected to the air inlet of the fan box (307); the fan box (307) is provided with a plurality of different chambers and is connected to the air inlet of the powerful fan (301).

6. The device according to claim 1, characterized in that: The waste liquid filtering and recovery device (6) comprises a waste liquid receiving tank (601), a multi-layer filter screen assembly (602) and a waste liquid tank (603), all of which are fixedly mounted on the bottom of the frame (101); the multi-layer filter screen assembly (602) is mounted between the waste liquid receiving tank (601) and the waste liquid tank (603); and the waste liquid tank (603) is connected to the liquid medicine tank (306) via a pipeline.

7. The device according to claim 1, characterized in that: The external liquid storage tank (8) is connected to the liquid medicine tank (306) via a pipeline.

8. The device according to claim 1, characterized in that: The disinfection device also includes a PLC system. The hardware part of the PLC system is arranged in the electric control box (103), including a touch screen, a button switch, an audible and visual indicator light, and a driver. The PLC system is electrically connected to the speed regulating motor (202), the powerful fan (301) and the booster pump (305).

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