Cold-chain transportation integrated device for short-wave ultraviolet coupled plasma

Abstract

The utility model discloses a short-wave ultraviolet coupled plasma cold chain transportation integrated device which comprises a transportation part, a sterilization part, a sorting part, a packaging part and a refrigeration part, and the sterilization part, the sorting part, the packaging part and the refrigeration part are all arranged in the transportation part; the whole process of feeding, sorting, packaging, pre-cooling, transporting, warehousing and the like is subjected to integrated sterilization and fresh-keeping operation of fruits and vegetables, and the whole process is sterile, so that the fresh-keeping time of the fruits and vegetables is effectively prolonged.

Description

Technical Field

[0001] The present application relates to a short-wave ultraviolet coupled plasma cold chain transportation integrated device, belonging to the field of sterilization devices. Background Art

[0002] Using short-wave ultraviolet rays (UV-C) can quickly kill bacteria, viruses, and fungi. The main principle is to destroy the RNA and DNA of microorganisms, causing bacteria, viruses, and fungi to denature and die.

[0003] The purpose of sterilization can also be achieved by using low-temperature plasma. The main principle is to use the active substances released by plasma to kill microorganisms. Plasma is an incompletely neutralized gas that contains positive, negative, neutral ions and free radicals. It has high energy and high reactivity. When plasma comes into contact with substances such as air or water, it will release some active substances, such as superoxide anions, hydroxyl free radicals, nitroxide free radicals, etc. These active substances have strong oxidation, reduction and bactericidal effects. Since plasma sterilization does not require high temperature, the original form and activity of the sterilized substance can be maintained without affecting its quality.

[0004] Currently, most fruits and vegetables are sterilized using short-wave ultraviolet light (UV-C) or low-temperature plasma alone, and the sterilization process is only for the fruits and vegetables after they are picked. There is no integrated design for subsequent packaging, transportation, and warehousing. As a result, in the subsequent process, fruits and vegetables need to be individually packaged, transferred for transportation, and transferred for storage, which causes them to rot due to contact with bacteria again. The inability to provide protection throughout the entire process greatly reduces the sterilization effect, and also reduces the preservation effect of the fruit. Utility Model Content

[0005] In order to solve the problems existing in the existing fruit and vegetable sterilization process, the present application proposes a short-wave ultraviolet coupled plasma cold chain transportation integrated device, which combines short-wave ultraviolet rays with low-temperature plasma to sterilize fruits and vegetables, and applies it to the integrated process of fruit and vegetable sorting, packaging, mobile pre-cooling, transportation, and warehousing. The sterilization and preservation operations of fruits and vegetables are integrated throughout the entire process from feeding, sorting, packaging, pre-cooling, transportation to warehousing, achieving full-process sterilization, thereby effectively extending the shelf life of fruits and vegetables.

[0006] According to one aspect of the present application, a short-wave ultraviolet coupled plasma cold chain transportation integrated device is provided, comprising a transportation unit, a sterilization unit, a sorting unit, a packaging unit and a refrigeration unit, which sterilizes the product to be sterilized throughout the entire process;

[0007] The sterilization unit, the sorting unit, the packaging unit and the refrigeration unit are all arranged inside the transportation unit;

[0008] The sterilization unit includes an ultraviolet device and a low-temperature plasma device, and adopts all-round sterilization, using ultraviolet light with a wavelength of 222nm for sterilization, because ultraviolet light of this wavelength can effectively sterilize and has extremely low harm to the human body.

[0009] Optionally, the sorting section and the packaging section are arranged inside the sterilization section;

[0010] The packaging unit is arranged at the exit of the sorting unit.

[0011] Optionally, a first control door is provided at the entrance of the sterilization section.

[0012] Optionally, a telescopic airbag is installed on the side of the low-temperature plasma device, and the low-temperature plasma device adopts single-electrode discharge, and its discharge electrode includes a substrate electrode and a nanoarray in-situ grown on the substrate electrode, and the nanoarray is selected from one of nanosheets, nanowires or nanorods;

[0013] An ultraviolet lamp is arranged in front of the discharge electrode;

[0014] Preferably, the material of the nanoarray is NiO, TiO2, Cu, CuO, C, WO3, Ag, Li4Ti5O 12 Any one of;

[0015] Preferably, the discharge electrode is configured in a sheet shape;

[0016] Preferably, the area of ​​the sheet-shaped discharge electrode is 1×2 cm 2 ;

[0017] Preferably, the thickness of the nanoarray is 0.2-20 microns;

[0018] Preferably, the nanoarray is grown vertically in situ on the substrate electrode.

[0019] Optionally, it also includes a control unit for controlling at least one of the intensity of ultraviolet rays, the voltage for generating plasma, the speed of the conveyor belt, the rotation speed of the roller, and the refrigeration temperature of the refrigeration unit.

[0020] Optionally, the sorting section includes a sorting assembly and a power device, and the sorting assembly includes a conveyor belt, a plurality of rollers, and a plurality of product outlets correspondingly arranged below the plurality of rollers;

[0021] The conveyor belt is close to the roller and its horizontal position is slightly higher than the roller;

[0022] The distance between the rollers is adjustable;

[0023] Each of the product outlets is provided with a packaging unit;

[0024] The roller is made of a material that can penetrate ultraviolet rays, such as a quartz tube or high boron glass, and a UV device is correspondingly arranged inside the roller;

[0025] The roller can be made of materials that can penetrate ultraviolet rays, such as quartz tubes or high-boron glass (the reason for not using ordinary glass is that ultraviolet rays of 200-275nm cannot penetrate or have a very low penetration rate), and a UV lamp can be placed inside. This operation can sterilize the fruits and vegetables rolling on the roller in all directions;

[0026] Preferably, the sorting components are arranged in upper and lower layers.

[0027] Setting up multiple layers can facilitate sorting and packaging at the same time, which improves the sterilization efficiency and saves a lot of time. In actual application, 2 to 3 layers can be set;

[0028] The distance between the rollers can be adjusted according to the size of the fruits and vegetables to be sorted, which can not only ensure the effective screening of fruits and vegetables within the target size range, but also improve the universality of the entire device.

[0029] Optionally, the sorting section further comprises a heightened baffle, which is arranged on both sides of the conveyor belt and the roller to prevent fruits and vegetables from rolling off from the sides.

[0030] Optionally, a second control door is provided at a position corresponding to the end of the product outlet for sensing the packaging part. When there is no packaging part at the corresponding position or the packaging part is full, the second control door is in a closed state, which can prevent the fruits and vegetables from continuing to roll forward and prevent them from falling.

[0031] The sorting unit in the present application can ensure that the fruits and vegetables are not squeezed during transportation, and also reduce the loss rate of fruits and vegetables.

[0032] Optionally, an ultraviolet device and / or a low-temperature plasma device is provided inside the transport section. The ultraviolet intensity here can be relatively weak, which is convenient for manual placement during sorting and packaging. The preservation effect of the fruit is greatly improved by cooperating with the refrigeration section and the low-temperature plasma generating device. The refrigeration section is used to ensure that the whole is in a relatively low temperature environment and provide temperature conditions for fruit preservation. The ultraviolet device is used to generate ultraviolet rays to sterilize the air / the entire internal area of ​​the transport section, and the plasma generated by the low-temperature plasma device is used to sterilize the surface / part of the inner surface of fruits and vegetables. The three cooperate with each other to achieve the best sterilization effect, and also significantly extend the shelf life of fruits and vegetables.

[0033] Optionally, a pulley is installed on the packaging unit to facilitate moving the fully loaded packaging basket to a suitable position for the next round of sorting.

[0034] The beneficial effects of this application include:

[0035] 1) The short-wave ultraviolet coupled plasma cold chain transportation integrated device provided in the present application combines short-wave ultraviolet rays with low-temperature plasma to sterilize fruits and vegetables, and applies it to the integrated process of fruit and vegetable sorting, packaging, mobile pre-cooling, transportation, and warehousing, thereby realizing an integrated full-process sterilization and preservation operation of fruits and vegetables, achieving full-process sterilization, significantly improving the sterilization effect, and extending the shelf life of fruits and vegetables;

[0036] 2) The short-wave ultraviolet coupled plasma cold chain transportation integrated device provided in the present application integrates fruit and vegetable sorting, packaging, mobile pre-cooling, transportation, and warehousing, so that fruits and vegetables can be immediately sorted and transferred to mobile pre-cooling equipment after sterilization, so as to achieve the purpose of timely locking the freshness of fruits and vegetables after harvesting, and significantly reduce the loss of fruits from picking to selling;

[0037] 3) The short-wave ultraviolet coupled plasma cold chain transportation integrated device provided in the present application can be designed with a multi-layer sorting section and a corresponding packaging section, which is convenient for large-scale processing, improves the efficiency of fruit and vegetable sterilization, and processes more fresh fruits in the shortest possible time;

[0038] 4) The present application provides a short-wave ultraviolet coupled plasma cold chain transportation integrated device, in which a telescopic airbag is installed on the side of the low-temperature plasma device for easy transportation, and a corresponding ultraviolet device is also arranged inside the roller for further all-round sterilization. In addition, an ultraviolet lamp is also installed inside the transportation device to increase the preservation effect of fruits and vegetables. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the overall structure of the device in one embodiment of the present application;

[0040] Figure 2 This is a schematic diagram of the structure of the sterilization part in one embodiment of the present application;

[0041] Figure 3 This is a schematic diagram of the structure of the sorting part in one embodiment of the present application.

[0042] List of parts and reference numerals:

[0043] 1. Transportation department; 2. Sorting department; 3. Sterilization department; 101. Refrigeration department; 102. Ultraviolet device; 103. Low-temperature plasma generating device; 104. Telescopic airbag; 105. Control department; 106. Conveyor belt; 107. Roller; 108. Packaging department; 109. Product export. DETAILED DESCRIPTION

[0044] The present application is described in detail below with reference to embodiments, but the present application is not limited to these embodiments.

[0045] According to one embodiment of the present application, a short-wave ultraviolet coupled plasma cold chain transportation integrated device is provided, which combines short-wave ultraviolet rays with low-temperature plasma to sterilize fruits and vegetables, and is applied to the integrated process of fruit and vegetable sorting, packaging, mobile pre-cooling, transportation, and warehousing. The sterilization and preservation operations of fruits and vegetables are integrated throughout the entire process from feeding, sorting, packaging, pre-cooling, transportation to warehousing, achieving full-process sterilization, thereby effectively extending the shelf life of fruits and vegetables.

[0046] It includes a transportation section 1, a sterilization section 3, a sorting section 2, a packaging section 108 and a refrigeration section 101, and sterilizes the products to be sterilized throughout the entire process;

[0047] The sterilization unit 3, the sorting unit 2, the packaging unit 108 and the refrigeration unit 101 are all arranged inside the transportation unit 1;

[0048] The sterilization section 3 includes an ultraviolet device 102 and a low-temperature plasma device, which adopts all-round sterilization and uses ultraviolet light with a wavelength of 222nm for sterilization. The reason is that ultraviolet light of this wavelength can effectively sterilize and has extremely low harm to the human body. The preservation effect of the fruit is greatly improved by cooperating with the refrigeration section 101 and the low-temperature plasma generating device 103. The refrigeration section 101 is used to ensure that the whole is in a relatively low temperature environment to provide temperature conditions for fruit preservation. The plasma generated by the low-temperature plasma device sterilizes the air / the entire internal area of ​​the transportation section 1, and the ultraviolet device 102 is used to generate ultraviolet rays to sterilize the surface / part of the inner surface of fruits and vegetables. The three cooperate with each other to achieve the best sterilization effect, and also significantly extend the preservation time of fruits and vegetables.

[0049] A first control door is provided at the entrance of the sterilization section 3 .

[0050] The telescopic airbag 104 is installed on the side of the low-temperature plasma device. The low-temperature plasma device adopts single-electrode discharge, and its discharge electrode includes a substrate electrode and a nanoarray grown in situ on the substrate electrode. The nanoarray is selected from one of nanosheets, nanowires or nanorods. In this embodiment, it is set in a sheet shape with an area of ​​1×2 cm 2 ; The thickness of the nanoarray is 5 microns;

[0051] An ultraviolet lamp is arranged in front of the discharge electrode;

[0052] The material of the nano array is CuO;

[0053] The sorting section 2 and the packaging section 108 are arranged inside the sterilization section 3;

[0054] The packaging unit 108 is disposed at the exit of the sorting unit 2 .

[0055] The controller 105 is also included, which is used to control the intensity of ultraviolet rays, the voltage for generating plasma, the speed of the conveyor belt 106 , the rotation speed of the roller 107 , and the refrigeration temperature of the refrigeration unit 101 .

[0056] The sorting section 2 includes a sorting assembly and a power device, wherein the sorting assembly includes a conveyor belt 106, a plurality of rollers 107, and a plurality of product outlets 109 correspondingly arranged below the plurality of rollers 107;

[0057] The conveyor belt 106 is close to the roller 107 and its horizontal position is slightly higher than the roller 107;

[0058] The distance between the rollers 107 is adjustable, and can be used to select fruits and vegetables of different sizes;

[0059] In this embodiment, three groups of rollers 107 with different spacings are provided. The farther from the conveyor belt 106, the larger the spacing between the rollers 107 in the roller group 107. When fruits and vegetables pass by, fruits and vegetables with smaller sizes are screened and packaged first, followed by fruits and vegetables with larger sizes that meet the requirements.

[0060] The distance between the rollers 107 can be adjusted accordingly according to the size of the fruits and vegetables to be sorted, which can not only ensure the effective screening of fruits and vegetables within the target size range, but also improve the universality of the entire device.

[0061] Each of the product outlets 109 is provided with a packaging unit 108;

[0062] The roller 107 is made of a quartz tube, which is a material that allows ultraviolet rays to penetrate, and a corresponding ultraviolet device is arranged inside the roller 107. In this embodiment, an ultraviolet lamp is selected, and this operation can sterilize fruits and vegetables in all directions.

[0063] The sorting section 2 further includes a heightened baffle, which is disposed on both sides of the conveyor belt 106 and the roller 107 to prevent fruits and vegetables from rolling down from the sides.

[0064] A second control door is provided at a corresponding position of the end of the product outlet 109 for sensing the packaging portion 108. When there is no packaging portion 108 at the corresponding position or when the packaging portion 108 is full, the second control door is closed, which can stop the fruits and vegetables from continuing to roll forward and prevent them from falling.

[0065] The sorting part 2 in the present application can ensure that the fruits and vegetables are not squeezed during transportation, and also reduce the loss rate of the fruits and vegetables.

[0066] The transporting part 1 is internally provided with an ultraviolet device 102 and a low-temperature plasma device 103 (not shown in the figure), where the intensity of ultraviolet rays can be relatively weak, so as to facilitate manual placement during the sorting and packaging process.

[0067] The packaging unit 108 is provided with pulleys to facilitate moving the fully loaded packaging basket to a suitable position for the next round of sorting.

[0068] The operating steps of this device are as follows:

[0069] S1: Adjust the distance between the rollers 107 according to the type of fruits and vegetables to be sterilized, start the power device to drive the conveyor belt 106 and the rollers 107 to transmit, turn on the ultraviolet device 102, the ultraviolet lamp and the low-temperature plasma generator 103, and set the ultraviolet intensity, the voltage of the plasma generated by the low-temperature plasma generator 103, the transmission speed of the conveyor belt 106, the rotation speed of the rollers 107, and the refrigeration temperature of the refrigeration unit 101 through the control unit 105;

[0070] S2: The picked fruits and vegetables to be sterilized are placed on the conveyor belt 106 in sequence, and after all the fruits and vegetables are placed, the first control door is closed;

[0071] S3: At this time, the fruits and vegetables to be sterilized are in the sorting section 2 in the cabin of the sterilization section 3, following the transmission of the conveyor belt 106 and the roller 107, and are sterilized in all directions during the sorting process. The sterilized fruits and vegetables selected according to the size will fall into the corresponding product outlet 109 below, and then fall into the packaging section 108 in turn. After the packaging section 108 is filled, the second control door is closed, and the fruits and vegetables to be sterilized are waiting for packaging at the product outlet 109;

[0072] S4: The fully loaded packaging section 108 is removed, and the empty packaging section 108 is replaced in the corresponding position, the second control door is opened, and the filling steps are repeated.

[0073] Example 1

[0074] After the rain, the mature bayberries from Majiandong, Lanxi, Zhejiang were picked and immediately passed through the sterilization section 3 of the integrated device, and were automatically sorted and packaged by the sorting section 2, and then entered the refrigeration section 101 for pre-cooling and storage at 5°C (relative humidity 90%), and ultraviolet treatment for 5 minutes. After 15 days of storage, only 10% of the bayberries were rotten. At the same time, the hardness of the bayberries changed with time as shown in Table 1, the vitamin C content changed as shown in Table 2, and the anthocyanin content changed as shown in Table 3.

[0075] Comparative Example 1

[0076] After the rain, the mature bayberries from Majiandong, Lanxi, Zhejiang were harvested, sorted, packaged, pre-cooled and stored at 5°C (relative humidity 90%). The bayberries were completely rotten after 15 days of storage. At the same time, the hardness of the bayberries changed with time as shown in Table 1, the vitamin C content changed as shown in Table 2, and the anthocyanin content changed as shown in Table 3.

[0077] Comparative Example 2

[0078] After the rain, the mature bayberries from Majiandong, Lanxi, Zhejiang were harvested, sorted and packaged manually, pre-cooled at 5°C, and stored in a low-temperature plasma atmosphere (relative humidity 90%). Only 40% of the bayberries were rotten after 15 days of storage. It can be seen that the preservation effect in the low-temperature plasma atmosphere is significantly better than that without low-temperature plasma sterilization. At the same time, the changes in the hardness of the bayberries over time are shown in Table 1, the changes in the vitamin C content are shown in Table 2, and the changes in the anthocyanin content are shown in Table 3.

[0079] Comparative Example 3

[0080] After the rain, the mature bayberries from Majiandong, Lanxi, Zhejiang were harvested, sorted and packaged manually, pre-cooled at 5°C, stored in a low-temperature plasma atmosphere (relative humidity 90%), and treated with ultraviolet light for 2 minutes. Only 35% of the bayberries were rotten after 15 days of storage. It can be seen that the preservation effect of adding ultraviolet light treatment for 2 minutes in a low-temperature plasma atmosphere is better than that of the low-temperature plasma atmosphere treatment alone. At the same time, the changes in the hardness of the bayberries over time are shown in Table 1, the changes in the vitamin C content are shown in Table 2, and the changes in the anthocyanin content are shown in Table 3.

[0081] Table 1 Variation of Bayberry Hardness over Time

[0082]

[0083] Table 2 Variation of the content of vitamin C in bayberry (mg / 100g) over time

[0084]

[0085] Table 3 Variation of the content of anthocyanin in myricetin (mg / 100g) over time

[0086]

[0087]

[0088] Example 2

[0089] After being picked, the strawberries are immediately passed through the integrated device to the sterilization section 3, and are automatically sorted and packaged by the sorting section 2, and then enter the refrigeration section 101 for precooling at 5° C. and storage (relative humidity 90%). The strawberries are still fresh after being stored for 3 days, and there is no obvious change in appearance. After being stored for 8 days, the skin is slightly dehydrated. After being stored for 11 days, the dehydrated surface of the skin increases, but the taste is still good.

[0090] Comparative Example 4

[0091] Strawberries were immediately treated with ultraviolet light for 2 minutes after being picked, and then placed in refrigeration section 101 for precooling and storage at 5°C (relative humidity 90%). The leaves of the strawberries began to dry up after 3 days of storage, and there was no obvious change in the appearance. The skin was slightly dehydrated after 5 days of storage. After 7 days of storage, the skin began to wither, shrivel, deteriorate and ferment, and had a rotten smell. After 10 days of storage, the strawberries were completely rotten and deteriorated.

[0092] Comparative Example 5

[0093] Strawberries were immediately placed in the refrigeration unit 101 for precooling at 5°C and storage (relative humidity 90%). The leaves of the strawberries began to dry up after 1 day of storage, and withered and shrunken after 5 days, deteriorated and fermented, and had a rotten smell. After 7 days of storage, they were completely rotten and deteriorated.

[0094] By comparing Example 2 with Comparative Examples 4 and 5, it can be seen that the treatment with the integrated device can effectively extend the shelf life of strawberries and has an excellent sterilization effect.

[0095] The above description is only a partial embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the above disclosed technical content to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A short-wave ultraviolet coupled plasma cold chain transportation integrated device, characterized in that: Including transportation department, sterilization department, sorting department, packaging department and refrigeration department, sterilizing the whole process of the products to be sterilized; The sterilization unit, the sorting unit, the packaging unit and the refrigeration unit are all arranged inside the transportation unit; The sterilization unit includes an ultraviolet device and a low-temperature plasma device.

2. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 1, characterized in that: The sorting part and the packaging part are arranged inside the sterilization part; The packaging unit is arranged at the exit of the sorting unit.

3. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 2, characterized in that: A first control door is provided at the entrance of the sterilization section.

4. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 1, characterized in that: A telescopic airbag is installed on the side of the low-temperature plasma device. The low-temperature plasma device adopts single-electrode discharge, and its discharge electrode includes a substrate electrode and a nanoarray in-situ grown on the substrate electrode, wherein the nanoarray is selected from one of nanosheets, nanowires or nanorods; An ultraviolet lamp is arranged in front of the discharge electrode.

5. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 4, characterized in that: The material of the nanoarray is NiO, TiO2, Cu, CuO, C, WO3, Ag, Li4Ti5O 12 Any one of .

6. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 1, characterized in that: The discharge electrode is configured in a sheet shape.

7. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 6, characterized in that: The area of ​​the sheet-shaped discharge electrode is 1×2 cm 2 .

8. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 4, characterized in that: The thickness of the nanoarray is 0.2-20 microns.

9. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 4, characterized in that: The nanoarray is vertically grown in situ on a substrate electrode.

10. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 1, characterized in that: It also includes a control unit for controlling at least one of the intensity of ultraviolet rays, the voltage for generating plasma, the speed of the conveyor belt, the rotation speed of the roller, and the refrigeration temperature of the refrigeration unit.

11. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 1, characterized in that: The sorting part includes a sorting assembly and a power device, and the sorting assembly includes a conveyor belt, a plurality of rollers, and a plurality of product outlets correspondingly arranged below the plurality of rollers; The conveyor belt is close to the roller and its horizontal position is higher than the roller; The distance between the rollers is adjustable; Each of the product outlets is provided with a packaging unit; The roller is made of quartz tube or high boron glass and an ultraviolet device is correspondingly arranged inside the roller.

12. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 11, characterized in that: The sorting assembly is arranged in upper and lower layers.

13. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 11, characterized in that: The sorting part further comprises a heightened baffle plate, and the heightened baffle plate is arranged on both sides of the conveyor belt and the roller.

14. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 13, characterized in that: A second control door is arranged at a position corresponding to the end of the product outlet.

15. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 1, characterized in that: An ultraviolet device and / or a low-temperature plasma device is arranged inside the transport part.

16. The short-wave ultraviolet coupled plasma cold chain transportation integrated device according to claim 1, characterized in that: A pulley is installed on the packaging part.

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