CN115245581A - Method for quickly inactivating surface of object in low-temperature environment - Google Patents
Method for quickly inactivating surface of object in low-temperature environment Download PDFInfo
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- CN115245581A CN115245581A CN202110465220.1A CN202110465220A CN115245581A CN 115245581 A CN115245581 A CN 115245581A CN 202110465220 A CN202110465220 A CN 202110465220A CN 115245581 A CN115245581 A CN 115245581A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000000415 inactivating effect Effects 0.000 title claims abstract description 35
- 230000001678 irradiating effect Effects 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 10
- 239000000178 monomer Substances 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 claims description 5
- 241000700605 Viruses Species 0.000 abstract description 18
- 230000002147 killing effect Effects 0.000 abstract description 12
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 11
- 230000001954 sterilising effect Effects 0.000 abstract description 8
- 241000588724 Escherichia coli Species 0.000 description 64
- 238000002474 experimental method Methods 0.000 description 63
- 230000002779 inactivation Effects 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 28
- 238000012856 packing Methods 0.000 description 17
- 238000012795 verification Methods 0.000 description 15
- 238000004806 packaging method and process Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 9
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 9
- 229910052753 mercury Inorganic materials 0.000 description 9
- 238000012546 transfer Methods 0.000 description 9
- 239000010453 quartz Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 229910052724 xenon Inorganic materials 0.000 description 7
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 5
- 230000007306 turnover Effects 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 206010019909 Hernia Diseases 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 229910052743 krypton Inorganic materials 0.000 description 2
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052754 neon Inorganic materials 0.000 description 2
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/14—Plasma, i.e. ionised gases
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
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- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The embodiment of the application relates to a method for quickly inactivating the surface of an object in a low-temperature environment, relates to the technical field of disinfection, and mainly aims to improve the virus killing efficiency of cold chain articles. The main technical scheme adopted is as follows: the method for quickly inactivating the surface of the object in the low-temperature environment comprises the following steps: spraying plasma on the surface to be inactivated by adopting a low-temperature plasma generating device; irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet ray generating device, and enabling the sprayed plasma and the irradiated ultraviolet rays to jointly act on the surface to be inactivated. Compared with the prior art, the device can realize high-efficiency sterilization of the cold chain article virus.
Description
Technical Field
The embodiment of the application relates to the technical field of disinfection, in particular to a method for quickly inactivating the surface of an object in a low-temperature environment.
Background
Viruses appear in our lives at all times and places, wherein part of viruses have strong infectivity and can be rapidly transmitted among animals and between people, thereby causing serious threat to the life safety of the animals and the people.
In order to ensure the safety of the living environment of people, virus killing work is usually required. The common virus killing work is carried out in a normal temperature environment, and in a cold chain environment in a low temperature environment, if a killing mode in the normal temperature environment is adopted, the killing efficiency of the virus can be met only by consuming more killing time, so that the virus killing efficiency of cold chain articles is low.
Disclosure of Invention
In view of this, the embodiment of the present application provides a method for quickly inactivating a surface of an object in a low temperature environment, and mainly aims to improve virus killing efficiency of a cold chain article.
In order to achieve the above purpose, the embodiments of the present application mainly provide the following technical solutions:
the embodiment of the application provides a method for quickly inactivating a surface of an object in a low-temperature environment, which comprises the following steps:
spraying plasma on the surface to be inactivated by adopting a low-temperature plasma generating device;
irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet ray generating device, and enabling the sprayed plasma and the irradiated ultraviolet rays to jointly act on the surface to be inactivated.
The purpose and the technical problem to be solved by the embodiments of the present application can be further achieved by the following technical measures.
Optionally, in the method for quickly inactivating a surface of an object in a low-temperature environment, plasma is sprayed on the surface to be inactivated by using a low-temperature plasma generating device, and the method includes:
the low-temperature plasma generating device sequentially sprays plasma to the first area and the second area of the surface to be inactivated at a set jet speed (the jet speed can be set by setting the air carrying quantity and the power supply power of the low-temperature plasma generating device) and a set moving speed.
Optionally, the method for quickly inactivating a surface of an object in a low-temperature environment, where an ultraviolet generating device is used to irradiate ultraviolet light to the surface to be inactivated, includes:
and simultaneously irradiating ultraviolet rays on the first area and the second area of the surface to be inactivated by adopting an ultraviolet ray generating device.
Optionally, the method for quickly inactivating a surface of an object in a low-temperature environment, where an ultraviolet generating device is used to irradiate ultraviolet light to the surface to be inactivated, includes:
continuously irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet lamp; or
And emitting full-spectrum pulse light to the surface to be inactivated by adopting a light pulse device.
Optionally, in the method for quickly inactivating the surface of an object in a low-temperature environment, the low-temperature plasma generating device uses an inert gas jet device.
Optionally, in the method for quickly inactivating a surface of an object in a low-temperature environment, the inert gas jet device is an argon gas jet device.
Optionally, in the method for quickly inactivating the surface of an object in a low-temperature environment, the aperture of each monomer jet orifice of the low-temperature plasma generating device is between phi 5 and phi 20mm;
the set jet speed is 1L/min-10L/min, and the set moving speed is 10mm/s-500mm/s.
Optionally, in the method for quickly inactivating the surface of the object in the low-temperature environment, the output power of the ultraviolet generating device is 100-300w.
Optionally, in the method for quickly inactivating the surface of the object in a low-temperature environment, the time for the sprayed plasma and the irradiated ultraviolet light to jointly act on the surface to be inactivated is 0.1 to 20s.
Optionally, the method for quickly inactivating the surface of the object in the low-temperature environment further includes:
identifying the thickness of an ice layer on the surface to be inactivated;
adjusting at least one output power of the low-temperature plasma generating device and the ultraviolet generating device according to the identified thickness of the ice layer; and/or
Identifying the intensity of the ultraviolet ray emitted by the ultraviolet ray generating device, and generating a prompt for replacing the ultraviolet ray generating device according to the identified intensity of the ultraviolet ray; and/or
And identifying the gas flow sprayed by the low-temperature plasma generating device, and correcting the gas flow sprayed by the low-temperature plasma generating device according to the comparison value of the identified gas flow and the preset gas flow.
By means of the technical scheme, the method for quickly inactivating the surface of the object in the low-temperature environment at least has the following advantages:
in the technical scheme provided by the embodiment of the invention, the low-temperature plasma generating device is adopted to spray plasma on the surface to be inactivated, the ultraviolet generating device irradiates ultraviolet light on the surface to be inactivated, the sprayed plasma and the irradiated ultraviolet light act on the surface to be inactivated together, the sprayed plasma and the ultraviolet light are coupled to act on bacteria and viruses on the surface to be inactivated, and the surface of an object in a low-temperature environment can be quickly inactivated. Compared with the prior art, the device can realize high-efficiency killing work of the cold chain article viruses.
The foregoing description is only an overview of the embodiments of the present application, and in order to provide a clear understanding of the technical solutions of the embodiments of the present application and to be implemented in accordance with the content of the description, the following detailed description of the preferred embodiments of the present application is provided in conjunction with the accompanying drawings.
Drawings
Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic structural diagram of a cold-chain packaging box turnover inactivation device at a first view angle, provided by an embodiment of the present application;
fig. 2 is a structural schematic diagram of a cold-chain packaging box turnover inactivation device at a second view angle, provided by an embodiment of the application.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be noted that, unless otherwise specified, technical terms or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.
An embodiment of the present application provides a method for quickly inactivating a surface of an object in a low temperature environment, including:
spraying plasma on the surface to be inactivated by adopting a low-temperature plasma generating device;
irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet ray generating device, and enabling the sprayed plasma and the irradiated ultraviolet rays to jointly act on the surface to be inactivated.
In the technical scheme provided by the embodiment of the invention, the low-temperature plasma generating device is adopted to spray plasma on the surface to be inactivated, the ultraviolet generating device irradiates ultraviolet light on the surface to be inactivated, the sprayed plasma and the irradiated ultraviolet light act on the surface to be inactivated together, the sprayed plasma and the ultraviolet light are coupled to act on bacteria and viruses on the surface to be inactivated, and the surface of an object in a low-temperature environment can be quickly inactivated. Compared with the prior art, the device can realize high-efficiency sterilization of the cold chain article virus.
Wherein, the low temperature plasma generating device can adopt an inert gas fluidic device to realize the injection of plasma, for example: at least one of a nitrogen jet device, a hernia jet device, a helium jet device, a neon jet device, a krypton jet device, and an argon jet device. The hernia jet device and the argon jet device have lower cost and are suitable for disinfection in actual environment. Adopting a low-temperature plasma generating device to spray plasma on the surface to be inactivated, comprising the following steps: and the low-temperature plasma generating device sprays plasma on the surface to be inactivated at a set jet speed and a set moving speed.
In practice, the inert gas jet device can be formed by a plurality of monomer jet openings, and the number of the specific monomer jet openings can be determined according to the jet efficiency, i.e. the more the monomer jet openings, the larger the area which can be simultaneously jetted. The aperture of each monomer jet orifice can be between phi 5mm and phi 20mm; the jet speed of each monomer jet orifice is 1L/min-10L/min, and the moving speed is 10mm/s-500mm/s.
The ultraviolet generating device may employ at least one of an ultraviolet lamp and a light pulse device. In practice, the output power of the ultraviolet generating device can be 100-300w. The wavelength of the UV lamp may be in the range of 200-275nm, preferably 220-270nm. In practice, the ultraviolet lamp can be realized by mercury lamp, etc., and the distance from the surface to be inactivated is 10-100cm, such as 30cm, 50cm, 80 cm.
The time for the sprayed plasma and the irradiated ultraviolet ray to jointly act on the surface to be inactivated can be 0.1-20s, so that the high-efficiency inactivation of bacteria and viruses can be realized, and the inactivation efficiency can reach 99.9%.
In the embodiment provided by the scheme, the inactivation method is adopted to carry out the following verification experiment:
verification experiment 1
The Escherichia coli is placed at-18 deg.C for 30min, and the experiment is started at-18 deg.C.
A10W xenon plasma jet nozzle with an outer diameter phi 8mm, an inner diameter phi 5mm quartz tube and a jet flow rate of 4L/min is adopted, jet injection is carried out on the surface attached with the escherichia coli at a moving speed of 100mm/s, 175W mercury lamp is adopted to irradiate ultraviolet rays on the surface attached with the escherichia coli, and the injected plasma and the irradiated ultraviolet rays jointly act on the escherichia coli.
Verification experiment 2
The Escherichia coli is placed at-18 deg.C for 30min, and the experiment is started at-18 deg.C.
The surface attached with the escherichia coli is subjected to jet injection at a moving speed of 10mm/s by adopting a helium plasma jet nozzle with the diameter of 10W, the outer diameter of 8mm, the inner diameter of 5mm and the jet flow rate of 1L/min, and the surface attached with the escherichia coli is irradiated with ultraviolet light by adopting a 175W mercury lamp, so that the injected plasma and the irradiated ultraviolet light jointly act on the escherichia coli.
Verification experiment 3
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
The surface attached with the escherichia coli is subjected to jet injection at a moving speed of 500mm/s by adopting a neon plasma jet nozzle with the diameter of 10W, the outer diameter phi 8mm, the inner diameter phi 5mm and the jet flow rate of 10L/min, and the ultraviolet light is irradiated on the surface attached with the escherichia coli by adopting a 175W mercury lamp, so that the injected plasma and the irradiated ultraviolet light jointly act on the escherichia coli.
Verification experiment 4
The Escherichia coli is placed at-18 deg.C for 30min, and the experiment is started at-18 deg.C.
Krypton plasma jet nozzle with 10W, outer diameter phi 8mm, inner diameter phi 5mm, bore quartz tube and jet flow rate of 4L/min is adopted to jet the surface attached with the escherichia coli at the moving speed of 100mm/s, 175W mercury lamp is adopted to irradiate the surface attached with the escherichia coli with ultraviolet light, and the jetted plasma and the irradiated ultraviolet light jointly act on the escherichia coli.
Verification experiment 5
The Escherichia coli is placed at-18 deg.C for 30min, and the experiment is started at-18 deg.C.
The method comprises the steps of adopting a 10w xenon plasma jet nozzle with an outer diameter phi 8mm, an inner diameter phi 5mm and a caliber quartz tube and a jet flow rate of 4L/min, carrying out jet injection on the surface attached with the escherichia coli at a moving speed of 100mm/s, and adopting full-spectrum pulse light to emit full-spectrum pulse light to the surface attached with the escherichia coli, so that the injected plasma and ultraviolet light in the emitted full-spectrum pulse light jointly act on the escherichia coli.
After the verification experiment, the escherichia coli sterilization efficiency of the verification experiment is measured as follows:
| experimental project | Sterilization efficiency (%) |
| Verification experiment 1 | 99.985 |
| Verification experiment 2 | 99.992 |
| Verification experiment 3 | 99.956 |
| Verification experiment 4 | 99.988 |
| Verification experiment 5 | 99.961 |
Meanwhile, in the embodiment provided by the scheme, in order to verify the effectiveness of the inactivation method provided by the scheme, a comparison experiment is carried out at the same time:
comparative experiment 1
The experiment was started after the E.coli was left at 24 ℃ for 30min at room temperature, with an experimental environment temperature of 24 ℃.
A10 w xenon plasma jet nozzle with an outer diameter phi 8mm, an inner diameter phi 5mm quartz tube and a jet flow rate of 4L/min is adopted to jet the surface attached with the escherichia coli at a moving speed of 100mm/s, so that the jetted plasma acts on the escherichia coli independently.
Comparative experiment 2
The experiment was started after the E.coli was left at 24 ℃ for 30min at-18 ℃.
A10 w xenon plasma jet nozzle with an outer diameter phi 8mm, an inner diameter phi 5mm quartz tube and a jet flow rate of 4L/min is adopted to jet the surface attached with the escherichia coli at a moving speed of 100mm/s, so that the jetted plasma acts on the escherichia coli independently.
Comparative experiment 3
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
A10 w xenon plasma jet nozzle with an outer diameter phi 8mm, an inner diameter phi 5mm, a caliber quartz tube and a jet flow rate of 4L/min is adopted to jet the surface attached with the escherichia coli at a moving speed of 100mm/s, so that the jetted plasma can act on the escherichia coli independently.
Comparative experiment 4
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
A10 w xenon plasma jet nozzle with an outer diameter phi 8mm, an inner diameter phi 5mm quartz tube and a jet flow rate of 4L/min is adopted, jet injection is carried out on the surface attached with the escherichia coli at a moving speed of 100mm/s, 30% hydrogen peroxide solution is adopted to spray the surface attached with the escherichia coli, and the sprayed plasma and the sprayed hydrogen peroxide solution jointly act on the escherichia coli.
Comparative experiment 5
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
Spraying 30% hydrogen peroxide solution on the surface with the attached Escherichia coli, so that the sprayed hydrogen peroxide solution can act on Escherichia coli independently.
Comparative experiment 6
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
Ultraviolet light was irradiated to the surface to which Escherichia coli was attached by a mercury lamp, and the irradiated ultraviolet light was allowed to act on Escherichia coli for 5s alone.
Comparative experiment 7
The Escherichia coli is placed at-18 deg.C for 30min, and the experiment is started at-18 deg.C.
Ultraviolet light was irradiated to the surface to which Escherichia coli was attached by a mercury lamp, and the irradiated ultraviolet light was allowed to act on Escherichia coli for 10 seconds alone.
Comparative experiment 8
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
Ultraviolet light was irradiated to the surface to which Escherichia coli was attached by a mercury lamp, and the irradiated ultraviolet light was allowed to act on Escherichia coli alone for 20 seconds.
Comparative experiment 9
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
The surface with Escherichia coli is irradiated with laser light from a laser head with an optical path of 15w, 10mm and 405nm, and the irradiated laser light is allowed to act on Escherichia coli for 5s.
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
The surface with Escherichia coli is irradiated with laser light by using a laser head having an optical path of 15w, 10mm in diameter and 405nm, and the irradiated laser light is allowed to act on Escherichia coli for 10s alone.
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
The surface with Escherichia coli was irradiated with laser light from a laser head of 15w, 10mm in diameter and 405nm, and the irradiated laser light was allowed to act on Escherichia coli alone for 20s.
The Escherichia coli is placed at-18 deg.C for 30min, and the experiment is started at-18 deg.C.
The method comprises the steps of adopting a xenon plasma jet nozzle with the diameter of a quartz tube of 10w, the outer diameter phi 8mm, the inner diameter phi 5mm and the jet flow rate of 4L/min, carrying out jet injection on the surface attached with the escherichia coli at the moving speed of 100mm/s, and adopting a laser head with the optical diameter of 15w, phi 10mm and the optical diameter of 405nm to carry out laser irradiation on the surface attached with the escherichia coli, so that the injected plasma and irradiated laser jointly act on the escherichia coli.
Comparative experiment 13
The experiment was started after the E.coli was left at-18 ℃ for 30min, with an experimental environment temperature of-18 ℃.
The surface attached with the Escherichia coli is irradiated with laser by adopting a laser head with the optical path of 15w, phi 10mm and the wavelength of 405nm, and the surface attached with the Escherichia coli is irradiated with ultraviolet light by adopting a 175w mercury lamp, so that the laser and the ultraviolet light jointly act on the Escherichia coli for 10s.
Through the comparative experiment, the escherichia coli sterilization efficiency of the comparative experiment is measured as follows:
| experimental project | Fungicidal efficiency (%) |
| Comparative experiment 1 | 93.84 |
| Comparative experiment 2 | 96.92 |
| Comparative experiment 3 | 78.57 |
| Comparative experiment 4 | 88.4 |
| Comparative experiment 5 | 96.9 |
| Comparative experiment 6 | 95.4 |
| Comparative experiment 7 | 98.3 |
| Comparative experiment 8 | 99.4 |
| Comparative experiment 9 | 29.7 |
| |
13.1 |
| |
33.3 |
| |
58.3 |
| Comparative experiment 13 | 90.8 |
Through the verification experiment and the comparison experiment, the comparison of the sterilization efficiency shows that the sterilization efficiency of the verification experiment is as high as 99.9%. In comparison with the normal temperature environment, the inactivation efficiency is reduced, and thus, more time is consumed. In the analysis of the killing effect of the single ultraviolet, the killing capability of more than 99.9 percent can not be achieved within 20s, but the effect of nearly 99.9 percent can be achieved after the ultraviolet is coupled with the argon jet. The technical scheme of coupling the jet plasma technology with the irradiation ultraviolet ray can keep the sterilization efficiency at a higher level in a short time in a low-temperature environment, and can be applied to quick inactivation of bacteria and viruses on the surface of a packaging box in a cold chain environment.
In the actual operation of virus inactivation on the surface of the cold chain package, the low-temperature plasma generating device is adopted to spray plasma on the surface to be inactivated, and the method comprises the following steps: and the low-temperature plasma generating device sequentially sprays plasma to the first area and the second area of the surface to be inactivated at a set jet speed and a set moving speed, and gradually sprays plasma to different areas of the surface to be inactivated. And simultaneously irradiating the first region and the second region of the surface to be inactivated with ultraviolet rays by adopting an ultraviolet ray generating device while the plasma is sprayed. That is, when the plasma is injected and the ultraviolet ray is irradiated to act on the first region together, the ultraviolet ray is applied to the second region alone, and when the plasma is injected and the ultraviolet ray is irradiated to act on the second region together, the ultraviolet ray is applied to the first region alone, and the virus killing effect is better.
In addition, the environment of the cold chain package is a wet and cold environment, ice layers with different thicknesses may be attached to the surface of the cold chain package, the sprayed plasma and the irradiated ultraviolet light jointly act on the surface of the cold chain package to be inactivated, and the method for quickly inactivating the surface of the low-temperature environment object further comprises the following steps:
identifying the thickness of an ice layer on the surface to be inactivated;
and adjusting the output power of the low-temperature plasma generating device and the ultraviolet generating device according to the identified thickness of the ice layer.
The ice layer thickness identification technology can be realized by adopting an image identification technology, a capacitance induction identification technology and the like. The output power of the low temperature plasma generator and the ultraviolet generator is increased with the thickness of the ice layer. Among the output powers of the low-temperature plasma generator and the ultraviolet generator, the output power (jet velocity) of the low-temperature plasma generator can be independently adjusted, or the output power (light intensity) of the ultraviolet generator can be independently adjusted, or the output powers of the low-temperature plasma generator and the ultraviolet generator can be simultaneously adjusted. Thereby being suitable for cold chain package inactivation in complex environment.
In addition, the service life of the ultraviolet ray generating device is identified, in the implementation, the intensity of the ultraviolet ray emitted by the ultraviolet ray generating device is identified, and the prompt for replacing the ultraviolet ray generating device is generated according to the identified intensity of the ultraviolet ray, so that the maintenance personnel can maintain the ultraviolet ray generating device in time.
In order to further improve the inactivation stability, the method also comprises the following steps:
and identifying the gas flow sprayed by the low-temperature plasma generating device, and correcting the gas flow sprayed by the low-temperature plasma generating device according to the contrast value of the identified gas flow and the preset gas flow.
And if the identified gas flow is larger than the preset gas flow, reducing the gas flow sprayed by the low-temperature plasma generating device. And if the identified gas flow is less than the preset gas flow, increasing the gas flow jetted by the low-temperature plasma generating device.
Based on the same technical concept, fig. 1 to 2 show an embodiment of an apparatus for turning and deactivating a cold-chain packing box according to the present application, and referring to fig. 1 to 2, the apparatus for turning and deactivating a cold-chain packing box according to an embodiment of the present application is used for deactivating a cubic cold-chain packing box, the cold-chain packing box includes a top surface, a bottom surface, a front surface, a rear surface, a first side surface, and a second side surface, and the apparatus for turning and deactivating a cold-chain packing box includes:
the first inactivation conveying assembly 10 comprises a first conveying part 11 and a first group of inactivation parts 12, wherein the first group of inactivation parts 12 are respectively arranged at the top and two sides of the first conveying part 11;
the second inactivation conveying assembly 20 comprises a second conveying part 21 and a second group of inactivation parts 22, wherein the second group of inactivation parts 22 are respectively arranged on the top and two sides of the second conveying part 21;
a third group of deactivating members;
a cold chain package turning assembly 30, configured to turn a first turned cold chain package from the first conveying component 11 to a second turned cold chain package, and turn the first turned cold chain package to the second conveying component 21, where a top surface of the first turned cold chain package faces a top of the first conveying component 11, the first side surface and the second side surface face two sides of the first conveying component 11, a bottom surface of the second turned cold chain package faces a top of the second conveying component 21, and the front surface and the rear surface face two sides of the second conveying component 21;
the first group of inactivation components 12 and the second group of inactivation components 22 are low-temperature plasma generation devices, and the third group of inactivation components are ultraviolet generation devices, and are used for applying the plasma generated by the low-temperature plasma generation devices and ultraviolet rays irradiated by the ultraviolet generation devices to the surface to be inactivated of the cold-chain packaging box together.
In the technical scheme provided by the embodiment of the invention, in the inactivation of the cubic cold-chain packing box, the cold-chain packing box which turns in the first direction can be firstly placed on the first conveying part 11, so that the cold-chain packing box is conveyed to pass through the first group of inactivation parts 12, and the bottom surface, the first side surface and the second side surface of the cold-chain packing box can be inactivated by the first group of inactivation parts 12 arranged at the top and two sides of the first conveying part 11; the first diverted cold-chain package may then be inverted from the first conveyor 11 to a second diverted by the cold-chain package inverting assembly 30 and then inverted to the second conveyor 21 and conveyed past the second set of deactivating members 22 to deactivate the top, front and rear sides of the cold-chain package.
The first conveying component 11 and the second conveying component 21 can adopt crawler-type conveying, roller-type conveying and the like. By the transfer of the first transfer unit 11, the cold-chain packages placed on the first transfer unit 11 can pass through the first group of inactivating units 12, so that the cold-chain packages are inactivated by the first group of inactivating units 12. By the transfer of the second transfer unit 21, the cold-chain packages placed on the second transfer unit 21 may pass through the second group of inactivating units 22, so that the cold-chain packages are inactivated by the second group of inactivating units 22.
Wherein the first set of inactivating components 12 and the second set of inactivating components 22 may be a low temperature plasma generating device, such as an inert gas jet device, preferably an argon jet device. The aperture of each monomer jet orifice of the low-temperature plasma generating device is phi 5-phi 20mm, and each monomer jet orifice is formed by arranging side by side and can be arranged and combined in a single row or multiple rows in the implementation process; in the inactivation operation of the low-temperature plasma generating device, the set jet speed of the low-temperature plasma generating device is 1L/min-10L/min, and the set moving speed of the low-temperature plasma generating device is 10mm/s-500mm/s. The low-temperature plasma sprayed by the low-temperature plasma generating device can kill bacteria and viruses on the surface of the cold chain packaging box.
The cold chain packing box turnover assembly 30 can be realized by a mechanical arm, namely a transfer robot, and can turn over the cold chain packing box which turns to the first direction from the first conveying part 11 to the second direction and turn over to the second conveying part 21.
In practice, the production cost of the robotically controlled arm is high, and in order to reduce the cost, in some implementations of the invention, the conveying direction of the first conveying member 11 is perpendicular to the conveying direction of the second conveying member 21; the cold chain container inverting assembly 30 includes: the first frame body 331 of the rotating frame is provided with a first inlet 332 and a first outlet 333, when the first frame body 331 of the rotating frame rotates to one side of the first conveying component 11, the first inlet 332 of the rotating frame is abutted with the tail end of the first conveying component 11, and when the first frame body 331 of the rotating frame rotates to one side of the second conveying component 21, the first outlet 333 of the rotating frame is abutted with the front end of the second conveying component 21. The driving mechanism 32 may be driven by a motor, a hydraulic pressure, or the like, and drives the rotation of the rotating frame. In the inactivation step, the first frame body 331 of the rotating frame rotates to one side of the first conveying part 11, the first inlet 332 of the rotating frame is in butt joint with the tail end of the first conveying part 11, after the first conveying part 11 conveys the cold-chain packing box through the first group of inactivation parts 12, the cold-chain packing box can enter the first frame body 331 through the first inlet 332, the top surface of the cold-chain packing box entering the first frame body 331 faces the top of the first conveying part 11, and the first side surface and the second side surface face two sides of the first conveying part 11. Since the conveying direction of the first conveying member 11 is perpendicular to the conveying direction of the second conveying member 21, after the driving mechanism 32 drives the rotating frame 33 to rotate forward by 180 °, the first frame 331 of the rotating frame rotates to the side of the second conveying member 21, and the first outlet 333 of the rotating frame is abutted to the front end of the second conveying member 21, so that the bottom surface of the cold chain packing box faces the top of the second conveying member 21, and the front surface and the rear surface face both sides of the second conveying member 21. The operator can carry the cold-chain package to the second transfer member 21 by carrying it, or by acting on it with a push-pull device. Then, the driving mechanism 32 can drive the rotating frame 33 to rotate forward 180 degrees or rotate backward 180 degrees, so that the first inlet 332 of the rotating frame is butted with the tail end of the first conveying part 11 again, and the subsequent cold-chain packaging box inactivation operation is facilitated.
In order to increase the inactivation efficiency, the second frame 334 of the rotary frame has a second inlet 335 and a second outlet 336, the second inlet 335 of the rotary frame is abutted against the end of the first conveying member 11 when the second frame 334 of the rotary frame is rotated to the first conveying member 11 side, and the second outlet 336 of the rotary frame is abutted against the front end of the second conveying member 21 when the second frame 334 of the rotary frame is rotated to the second conveying member 21 side. The driving mechanism 32 drives the rotating housing 33 to sequentially circulate the first housing 331 and the second housing 334 in the first conveyance member 11. It is to be understood that, in the embodiment, the present invention is not limited to two housings, and a plurality of housings may be provided, for example, a third housing of the rotating frame may have a third inlet and a third outlet, and when the third housing of the rotating frame rotates to the first conveying member 11 side, the third inlet of the rotating frame may abut against the end of the first conveying member 11, and when the third housing of the rotating frame rotates to the second conveying member 21 side, the third outlet of the rotating frame may abut against the front end of the second conveying member 21.
In this embodiment, two frame bodies are taken as an example, the second frame body 334 is disposed opposite to the first frame body 331, when the first frame body 331 of the rotating frame is rotated to the first conveying member 11 side, the second frame body 334 of the rotating frame is rotated to the second conveying member 21 side, and when the first frame body 331 of the rotating frame is rotated to the second conveying member 21 side, the second frame body 334 of the rotating frame is rotated to the first conveying member 11 side. The rotating frame may be at least two i-shaped frames arranged in parallel, a first opening side of the at least two i-shaped frames forms the first frame body 331, and a second opening side of the at least two i-shaped frames forms the second frame body 334.
Further, in an embodiment of fully-automatic turning and carrying operation of the cold-chain packaging box, the first conveying unit 11 includes a conveyor belt 111 disposed between at least two i-shaped frames for conveying the cold-chain packaging box into the rotating frame; the second conveying member 21 comprises a conveying roller 211 arranged between at least two i-shaped frames for conveying the cold chain containers out of the rotating frame. In the inactivation operation of the cold-chain packaging box, the cold-chain packaging box is firstly inactivated by the first group of inactivation units 12 under the transmission of the first transmission unit 11, and then pushed into the rotating frame by the transmission belt 111. That is, when the first housing 331 rotates to the first transfer member 11 side, the first housing 331 is pushed into the first housing 331. When the second frame 334 rotates to the first conveying member 11 side, it is pushed into the second frame 334. In the rotating process of the rotating frame, the conveying belt 111 is arranged between at least two I-shaped frames, and the conveying roller 211 is arranged between at least two I-shaped frames, so that the rotation of the rotating frame is not influenced. When the first frame 331 rotates to the first transmission part 11 side, or when the second frame 334 rotates to the first transmission part 11 side, the transmission belt 111 and the transmission roller 211 are both located at the bottom of the revolving frame, so that the cold-chain packing boxes in the revolving frame can be transmitted (the cold-chain packing boxes in the revolving frame can be placed on the transmission belt 111 or the transmission roller 211).
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the devices described above may be referred to one another. In addition, "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent merits of the embodiments.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various claimed aspects. However, the disclosed apparatus should not be construed to reflect the intent: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, application is directed to less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
Those skilled in the art will appreciate that the components of the apparatus of the embodiments may be adapted and arranged in one or more arrangements different from the embodiments. The components of the embodiments may be combined into one component and, in addition, they may be divided into a plurality of sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the components of any apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination. The various component embodiments of the present application may be implemented in hardware, or in a combination thereof.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or components not listed in a claim. The word "a" or "an" preceding a component or element does not exclude the presence of a plurality of such components or elements. The application can be implemented by means of an apparatus comprising several distinct elements. In the claims enumerating several means, several of these means may be embodied by one and the same item. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
The foregoing is a preferred embodiment of the present application, which is not intended to be limiting in any way, and any simple modifications, equivalent variations and modifications made to the foregoing embodiment according to the technical spirit of the present application are within the scope of the present application.
Claims (10)
1. A method for quickly inactivating the surface of an object in a low-temperature environment is characterized by comprising the following steps:
spraying plasma on the surface to be inactivated by adopting a low-temperature plasma generating device;
irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet ray generating device, and enabling the sprayed plasma and the irradiated ultraviolet rays to jointly act on the surface to be inactivated.
2. The method for rapidly inactivating the surface of an object in a low-temperature environment according to claim 1, wherein the step of spraying plasma on the surface to be inactivated by using a low-temperature plasma generating device comprises the following steps:
and the low-temperature plasma generating device sequentially sprays plasma to the first area and the second area of the surface to be inactivated at a set jet speed and a set moving speed.
3. The method for rapidly inactivating the surface of the object in the low-temperature environment according to claim 2, wherein the irradiating ultraviolet rays to the surface to be inactivated by using an ultraviolet ray generating device comprises:
and simultaneously irradiating ultraviolet rays on the first area and the second area of the surface to be inactivated by adopting an ultraviolet ray generating device.
4. The method for rapidly inactivating the surface of an object in a low-temperature environment according to claim 2, wherein irradiating the surface to be inactivated with ultraviolet light by using an ultraviolet light generating device comprises:
continuously irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet lamp; or
And (3) emitting full-spectrum pulse light to the surface to be inactivated by adopting an optical pulse device.
5. The method for rapidly inactivating the surface of an object in a low-temperature environment according to claim 2,
the low-temperature plasma generating device adopts an inert gas jet device.
6. The method for rapidly inactivating the surface of an object in a low temperature environment according to claim 5,
the inert gas jet device is an argon jet device.
7. The method for rapidly inactivating the surface of an object in a low-temperature environment according to claim 6,
the aperture of each monomer jet orifice of the low-temperature plasma generating device is phi 5-phi 20mm;
the set jet speed is 1L/min-10L/min, and the set moving speed is 10mm/s-500mm/s.
8. The method for rapidly inactivating the surface of an object in a low-temperature environment according to claim 1,
the output power of the ultraviolet generating device is 100-300w.
9. The method for rapidly inactivating the surface of an object in a low temperature environment according to claim 1,
the time for the sprayed plasma and the irradiated ultraviolet ray to act on the surface to be inactivated together is 0.1-20s.
10. The method for rapidly inactivating the surface of the low-temperature environment object according to claim 1, further comprising:
identifying the thickness of an ice layer on the surface to be inactivated;
adjusting at least one output power of the low-temperature plasma generating device and the ultraviolet generating device according to the identified thickness of the ice layer; and/or
Identifying the intensity of the ultraviolet ray emitted by the ultraviolet ray generating device, and generating a prompt for replacing the ultraviolet ray generating device according to the identified intensity of the ultraviolet ray; and/or
And identifying the gas flow sprayed by the low-temperature plasma generating device, and correcting the gas flow sprayed by the low-temperature plasma generating device according to the contrast value of the identified gas flow and the preset gas flow.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040211916A1 (en) * | 2003-04-23 | 2004-10-28 | Glenn Calvert | Devices and methods for determining the amount of energy absorbed during irradiation |
| CN202288940U (en) * | 2011-10-26 | 2012-07-04 | 东华大学 | Atmospheric pressure low temperature plasma jet sterilizer |
| CN212593169U (en) * | 2020-03-27 | 2021-02-26 | 深圳市鑫中欧科技有限公司 | Portable chopstick sterilizing box |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040211916A1 (en) * | 2003-04-23 | 2004-10-28 | Glenn Calvert | Devices and methods for determining the amount of energy absorbed during irradiation |
| CN202288940U (en) * | 2011-10-26 | 2012-07-04 | 东华大学 | Atmospheric pressure low temperature plasma jet sterilizer |
| CN212593169U (en) * | 2020-03-27 | 2021-02-26 | 深圳市鑫中欧科技有限公司 | Portable chopstick sterilizing box |
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