CN115245581B - Method for rapidly inactivating object surface in low-temperature environment - Google Patents
Method for rapidly inactivating object surface in low-temperature environment Download PDFInfo
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- CN115245581B CN115245581B CN202110465220.1A CN202110465220A CN115245581B CN 115245581 B CN115245581 B CN 115245581B CN 202110465220 A CN202110465220 A CN 202110465220A CN 115245581 B CN115245581 B CN 115245581B
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000000415 inactivating effect Effects 0.000 title claims abstract description 37
- 230000001678 irradiating effect Effects 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 230000002779 inactivation Effects 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 21
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 230000003287 optical effect Effects 0.000 claims description 8
- 239000011261 inert gas Substances 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 claims description 5
- 241000700605 Viruses Species 0.000 abstract description 18
- 238000004659 sterilization and disinfection Methods 0.000 abstract description 16
- 230000001954 sterilising effect Effects 0.000 abstract description 8
- 241000588724 Escherichia coli Species 0.000 description 63
- 238000002474 experimental method Methods 0.000 description 63
- 238000012856 packing Methods 0.000 description 37
- 230000000052 comparative effect Effects 0.000 description 28
- 238000012795 verification Methods 0.000 description 15
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 9
- 229910052753 mercury Inorganic materials 0.000 description 9
- 239000010453 quartz Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- 238000005516 engineering process Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000000243 solution Substances 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
- 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
- 238000004458 analytical method Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000005540 biological transmission Effects 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
- 230000009849 deactivation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 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
- 238000007750 plasma spraying Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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 rapidly inactivating the surface of an object in a low-temperature environment, which relates to the technical field of disinfection and mainly aims to improve the virus sterilizing efficiency of cold chain articles. The technical scheme mainly adopted is as follows: the method for rapidly 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; and irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet generating device, so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the surface to be inactivated. Compared with the prior art, the method can realize the efficient disinfection 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 rapidly inactivating the surface of an object in a low-temperature environment.
Background
Viruses can appear in our lives anytime and anywhere, wherein part of viruses have strong infectivity, can be rapidly transmitted between animals and between people, and cause 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 if a killing mode in a normal temperature environment is adopted in a cold chain environment in a low temperature environment, more killing time is required to be consumed to meet the virus killing efficiency, so that the virus killing efficiency of cold chain articles is low.
Disclosure of Invention
In view of this, the embodiment of the application provides a method for rapidly inactivating the surface of an object in a low-temperature environment, and mainly aims to improve the virus killing efficiency of cold chain articles.
In order to achieve the above objective, the embodiments of the present application mainly provide the following technical solutions:
the embodiment of the application provides a method for rapidly inactivating the 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;
and irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet generating device, so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the surface to be inactivated.
The purpose and the technical problem of the embodiments of the present application can be further achieved by adopting the following technical measures.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment includes spraying plasma on the surface to be inactivated by using a low-temperature plasma generating device, including:
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 capacity and the power supply power of the low-temperature plasma generating device), and a set moving speed.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment includes that an ultraviolet generating device is used for irradiating ultraviolet rays on the surface to be inactivated, and the method includes:
and simultaneously irradiating ultraviolet rays on the first area and the second area of the surface to be inactivated by adopting an ultraviolet generating device.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment includes that an ultraviolet generating device is used for irradiating ultraviolet rays on the surface to be inactivated, and the method includes:
continuously irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet lamp; or (b)
And adopting an optical pulse device to emit full spectrum pulse light to the surface to be inactivated.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment is described, wherein the low-temperature plasma generating device adopts an inert gas jet device.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment is described, wherein the inert gas jet device is an argon gas jet device.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment is characterized in that the aperture of each monomer jet orifice of the low-temperature plasma generating device is phi 5-phi 20mm;
the jet flow speed is set to be 1L/min-10L/min, and the moving speed is set to be 10mm/s-500mm/s.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment is characterized in that the output power of the ultraviolet generating device is 100-300w.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment is characterized in that the time for the sprayed plasma and the irradiated ultraviolet light to jointly act on the surface to be inactivated is 0.1-20s.
Optionally, the method for rapidly inactivating the surface of the object in the low-temperature environment further comprises the following steps:
identifying the thickness of the ice layer on the surface to be deactivated;
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 ultraviolet rays 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 rays; and/or
And identifying the gas flow rate sprayed by the low-temperature plasma generating device, and correcting the gas flow rate sprayed by the low-temperature plasma generating device according to the comparison value of the identified gas flow rate and the preset gas flow rate.
By means of the technical scheme, the method for rapidly inactivating the surface of the object in the low-temperature environment has the following advantages:
according to 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 rays on the surface to be inactivated, so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the surface to be inactivated, and the sprayed plasma and the ultraviolet rays are coupled to act on bacteria and viruses on the surface to be inactivated, so that the rapid inactivation of the surface of an object in a low-temperature environment can be realized. Compared with the prior art, the method can realize the efficient disinfection of the cold chain article virus.
The foregoing description is only an overview of the technical solutions of the present application, and in order to make the technical means of the embodiments of the present application more clearly understood, the present application may be implemented according to the content of the specification, and the following detailed description of the preferred embodiments of the present application will be given with reference to the accompanying drawings.
Drawings
Various other 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 designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural view of a first view angle of a cold chain packaging box overturning and inactivating device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a second view angle of a cold chain packaging box overturning and inactivating device according to an embodiment of the present 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 to 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 noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
The method for rapidly inactivating the surface of the object in the low-temperature environment provided by one embodiment of the application comprises the following steps:
spraying plasma on the surface to be inactivated by adopting a low-temperature plasma generating device;
and irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet generating device, so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the surface to be inactivated.
According to 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 rays on the surface to be inactivated, so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the surface to be inactivated, and the sprayed plasma and the ultraviolet rays are coupled to act on bacteria and viruses on the surface to be inactivated, so that the rapid inactivation of the surface of an object in a low-temperature environment can be realized. Compared with the prior art, the method can realize the efficient disinfection of the cold chain article virus.
Wherein, the low temperature plasma generating device can adopt an inert gas jet device to realize the plasma injection, for example: at least one of nitrogen jet device, hernia jet device, helium jet device, neon jet device, krypton jet device, and argon jet device. The hernia jet device and the argon jet device have lower cost and are suitable for disinfection in practical environments. Spraying plasma on the surface to be inactivated by adopting a low-temperature plasma generating device, comprising the following steps: 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 may be formed by using a plurality of single jet ports, and the number of specific single jet ports may be determined according to the jet efficiency, that is, the more single jet ports, the larger the area that can be jetted simultaneously. The aperture of each monomer jet orifice can be phi 5-phi 20mm; the jet flow speed of each monomer jet orifice is 1L/min-10L/min, and the moving speed is 10mm/s-500mm/s.
The ultraviolet generating device can adopt 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 ultraviolet 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 of the sprayed plasma and the irradiated ultraviolet light jointly acting on the surface to be inactivated can be 0.1-20s, so that the efficient inactivation of bacteria and viruses can be realized, and the inactivation efficiency can reach 99.9%.
In the embodiment provided by the scheme, the following verification experiment is performed by adopting the inactivation method:
verification experiment 1
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) adopting a 10W quartz tube with an outer diameter phi 8mm and an inner diameter phi 5mm and a xenon plasma jet nozzle with a jet flow rate of 4L/min to jet the surface attached with the escherichia coli at a moving speed of 100mm/s, and adopting a 175W mercury lamp to irradiate ultraviolet rays on the surface attached with the escherichia coli so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the escherichia coli.
Verification experiment 2
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
Adopting a helium plasma jet nozzle with the caliber of 10W, the outer diameter phi 8mm and the inner diameter phi 5mm and the jet flow rate of 1L/min to jet the surface attached with the escherichia coli at the moving speed of 10mm/s, and adopting a 175W mercury lamp to irradiate ultraviolet rays on the surface attached with the escherichia coli so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the escherichia coli.
Verification experiment 3
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) spraying the surface attached with the escherichia coli by using a neon plasma jet nozzle with the diameter of 10W, the outer diameter phi 8mm, the inner diameter phi 5mm and the jet flow of 10L/min at the moving speed of 500mm/s, and irradiating ultraviolet rays on the surface attached with the escherichia coli by using a 175W mercury lamp so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the escherichia coli.
Verification experiment 4
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) adopting a krypton plasma jet nozzle with the diameter of a quartz tube with the diameter of 10W, the outer diameter phi 8mm and the inner diameter phi 5mm and the jet flow rate of 4L/min to jet the surface attached with the escherichia coli at the moving speed of 100mm/s, and adopting a 175W mercury lamp to irradiate ultraviolet rays on the surface attached with the escherichia coli so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the escherichia coli.
Verification experiment 5
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) adopting a 10w quartz tube with an outer diameter phi 8mm and an inner diameter phi 5mm and a xenon plasma jet nozzle with a jet flow of 4L/min to jet 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 ejected plasma and ultraviolet light in the emitted full spectrum pulse light jointly act on the escherichia coli.
Through verification experiments, the escherichia coli sterilization efficiency of the verification experiments is measured as follows:
| experimental items | 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 performed at the same time:
comparative experiment 1
The E.coli was allowed to stand at 24℃for 30min at room temperature and then the experiment was started at an ambient temperature of 24 ℃.
And (3) adopting a 10w quartz tube with an outer diameter phi 8mm and an inner diameter phi 5mm and a xenon plasma jet nozzle with a jet flow rate of 4L/min to jet the surface attached with the escherichia coli at a moving speed of 100mm/s, so that the jet plasma is independently acted on the escherichia coli.
Comparative experiment 2
The E.coli was allowed to stand at 24℃for 30min at room temperature and then the experiment was started at an ambient temperature of-18 ℃.
And (3) adopting a 10w quartz tube with an outer diameter phi 8mm and an inner diameter phi 5mm and a xenon plasma jet nozzle with a jet flow rate of 4L/min to jet the surface attached with the escherichia coli at a moving speed of 100mm/s, so that the jet plasma is independently acted on the escherichia coli.
Comparative experiment 3
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) adopting a 10w quartz tube with an outer diameter phi 8mm and an inner diameter phi 5mm and a xenon plasma jet nozzle with a jet flow rate of 4L/min to jet the surface attached with the escherichia coli at a moving speed of 100mm/s, so that the jet plasma is independently acted on the escherichia coli.
Comparative experiment 4
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) spraying the surface attached with the escherichia coli by using a xenon plasma jet nozzle with the diameter of 10w, the outer diameter phi 8mm, the inner diameter phi 5mm and the jet flow of 4L/min at the moving speed of 100mm/s, and spraying the surface attached with the escherichia coli by using 30% hydrogen peroxide solution, so that the sprayed plasma and the sprayed hydrogen peroxide solution jointly act on the escherichia coli.
Comparative experiment 5
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
Spraying 30% hydrogen peroxide solution on the surface attached with the escherichia coli, so that the sprayed hydrogen peroxide solution independently acts on the escherichia coli.
Comparative experiment 6
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) irradiating ultraviolet rays on the surface attached with the escherichia coli by using a mercury lamp, so that the irradiated ultraviolet rays independently act on the escherichia coli for 5s.
Comparative experiment 7
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) irradiating ultraviolet rays on the surface attached with the escherichia coli by using a mercury lamp, so that the irradiated ultraviolet rays independently act on the escherichia coli for 10s.
Comparative experiment 8
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
And (3) irradiating ultraviolet rays on the surface attached with the escherichia coli by using a mercury lamp, so that the irradiated ultraviolet rays independently act on the escherichia coli for 20s.
Comparative experiment 9
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
The surface to which the E.coli was attached was irradiated with a laser beam having an optical path of 15w and 10mm and a laser head of 405nm, and the irradiated laser beam was allowed to act on the E.coli alone for 5s.
Comparative experiment 10
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
The surface to which the E.coli was attached was irradiated with laser light using a laser head having an optical path of 15w and 10mm and a laser beam of 405nm, and the irradiated laser light was allowed to act on E.coli 10s alone.
Comparative experiment 11
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
The surface to which the E.coli was attached was irradiated with a laser beam having an optical path of 15w and 10mm and a laser head of 405nm, and the irradiated laser beam was allowed to act on the E.coli alone for 20s.
Comparative experiment 12
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
The method comprises the steps of performing jet spraying on the surface attached with the escherichia coli at a moving speed of 100mm/s by using a xenon plasma jet nozzle with a bore quartz tube with the outer diameter phi 8mm and the inner diameter phi 5mm and a jet flow of 4L/min, and performing laser irradiation on the surface attached with the escherichia coli by using a laser head with the optical diameter phi 10mm and the optical diameter phi 405nm, so that the sprayed plasma and the irradiated laser jointly act on the escherichia coli.
Comparative experiment 13
E.coli was allowed to stand at-18℃for 30min and then the experiment was started at-18℃ambient temperature.
The surface attached with the escherichia coli is irradiated by laser heads with 15w, phi 10mm optical paths and 405nm, and the surface attached with the escherichia coli is irradiated by ultraviolet rays by a 175w mercury lamp, so that the laser and the ultraviolet rays jointly act on the escherichia coli for 10s.
The coliform sterilization efficiency of the comparative experiment is measured through the comparative experiment as follows:
| experimental items | Sterilization 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 |
| Comparative experiment 10 | 13.1 |
| Comparative experiment 11 | 33.3 |
| Comparative experiment 12 | 58.3 |
| Comparative experiment 13 | 90.8 |
The comparison of the sterilization efficiency can prove that the sterilization efficiency of the verification experiment is as high as 99.9 percent through the verification experiment and the comparison experiment. However, the inactivation efficiency is reduced in a low temperature environment compared with that in a normal temperature environment, and thus, more time is consumed. In the analysis of the individual ultraviolet disinfection effect, the disinfection capability of more than 99.9 percent is not achieved in 20s, but the effect of approximately 99.9 percent can be achieved after the ultraviolet disinfection effect is coupled with argon jet. According to the technical scheme, the jet plasma technology and the ultraviolet radiation coupling technology are adopted, the sterilization efficiency in a short time can be kept at a higher level in a low-temperature environment, and the method can be applied to rapid inactivation of bacteria and viruses on the surface of a packaging box in a cold chain environment.
In the practical operation of inactivating viruses on the surface of a cold chain package, spraying plasma on the surface to be inactivated by adopting 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, and gradually sprays the plasma to different areas of the surface to be inactivated. The plasma spraying may be performed simultaneously with the irradiation of ultraviolet light by the ultraviolet generating device on the first region and the second region of the surface to be inactivated. That is, when the sprayed plasma and the irradiated ultraviolet light act together in the first region, the second region acts alone with ultraviolet light, and when the sprayed plasma and the irradiated ultraviolet light act together in the second region, the first region acts alone with ultraviolet light, and the effect of virus killing is better.
In addition, the environment where the cold chain package is located is a wet and cold environment, ice layers with different thicknesses can be attached to the surface of the cold chain package, the sprayed plasma and the irradiated ultraviolet light jointly act on the surface to be deactivated of the cold chain package, and the method for quickly inactivating the surface of an object in the low-temperature environment further comprises the following steps:
identifying the thickness of the ice layer on the surface to be deactivated;
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 identification technology of the thickness of the ice layer 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 generating device and the ultraviolet generating device increases with the thickness of the ice layer. The output power (jet velocity) of the low-temperature plasma generating device, the output power (light intensity) of the ultraviolet generating device, or both the low-temperature plasma generating device and the ultraviolet generating device can be independently adjusted. Thereby being applicable to the cold chain package inactivation in complex environments.
In addition, the service life of the ultraviolet generating device is not long, in the implementation, the intensity of ultraviolet rays emitted by the ultraviolet generating device is identified, and the prompt of replacing the ultraviolet generating device is generated according to the identified intensity of the ultraviolet rays, so that maintenance personnel can maintain the device in time.
To further improve the stability of the inactivation, it further comprises:
and identifying the gas flow rate sprayed by the low-temperature plasma generating device, and correcting the gas flow rate sprayed by the low-temperature plasma generating device according to the comparison value of the identified gas flow rate and the preset gas flow rate.
If the identified gas flow is greater than the preset gas flow, the gas flow sprayed by the low-temperature plasma generating device is reduced. If the identified gas flow is smaller than the preset gas flow, the gas flow sprayed by the low-temperature plasma generating device is improved.
Based on the same technical concept, fig. 1 to fig. 2 are an embodiment of a cold chain packing case overturning and inactivating device provided by the present application, referring to fig. 1 to fig. 2, the cold chain packing case overturning and inactivating device provided by the embodiment of the present application is used for inactivating a cubic cold chain packing case, where the cold chain packing case includes a top surface, a bottom surface, a front surface, a rear surface, a first side surface and a second side surface, and the cold chain packing case overturning and inactivating device includes:
a first inactivation transport assembly 10 comprising a first transport member 11 and a first set of inactivation members 12, the first set of inactivation members 12 being disposed on top of and on both sides of the first transport member 11, respectively;
a second inactivation transport assembly 20 comprising a second transport member 21 and a second set of inactivation members 22, the second set of inactivation members 22 being disposed on top of and on both sides of the second transport member 21, respectively;
a third set of inactivation components;
a cold chain packing box turning assembly 30 for turning a first turned cold chain packing box from the first conveying member 11 to a second turned cold chain packing box and to the second conveying member 21, wherein a top surface of the first turned cold chain packing box faces a top of the first conveying member 11, the first side surface and the second side surface face both sides of the first conveying member 11, a bottom surface of the second turned cold chain packing box faces a 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 first set of inactivating components 12 and the second set of inactivating components 22 are low-temperature plasma generating devices, and the third set of inactivating components are ultraviolet generating devices, which are used for jointly acting the plasma generated by the low-temperature plasma generating devices and ultraviolet rays irradiated by the ultraviolet generating devices on the surface to be inactivated of the cold chain packaging box.
In the technical scheme provided by the embodiment of the invention, in the process of inactivating the three-dimensional cold chain packing box, the cold chain packing box with the first direction can be firstly placed in the first conveying component 11, so that the cold chain packing box is conveyed to pass through the first group of inactivating components 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 inactivating components 12 arranged at the top and at two sides of the first conveying component 11; the first diverted cold chain package may then be turned from the first conveyor assembly 11 to a second diverted cold chain package by the cold chain package turning assembly 30 and turned to the second conveyor assembly 21, conveyed past the second set of deactivation elements 22, to deactivate the top, front and rear sides of the cold chain package.
The first conveying member 11 and the second conveying member 21 may be crawler-type conveying, roller-type conveying, or the like. By the conveyance of the first conveying member 11, the cold chain packing boxes placed on the first conveying member 11 can pass through the first group of inactivating members 12, so that the first group of inactivating members 12 inactivate the cold chain packing boxes. By the conveyance of the second conveying member 21, the cold chain packing boxes placed on the second conveying member 21 can pass through the second group of inactivating members 22, so that the second group of inactivating members 22 inactivate the cold chain packing boxes.
Wherein the first set of inactivation members 12 and the second set of inactivation members 22 may be low temperature plasma generation devices, such as inert gas jet devices, and wherein argon gas jet devices are preferred. The aperture of each single jet orifice of the low-temperature plasma generating device is phi 5-phi 20mm, and each single jet orifice is arranged side by side, and the single jet orifice or the multiple jet orifices can be arranged and combined in the implementation; in the inactivation operation of the low-temperature plasma generating device, the set jet flow 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 packing box.
The cold chain packing box overturning assembly 30 can be realized by a mechanical arm, namely a transfer robot, and can realize overturning of the cold chain packing box with the first steering from the first conveying part 11 to the second steering and overturning 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 present 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 packing box overturning assembly 30 comprises: the rotary frame body 33 is rotatably arranged on the support 31, the driving end of the driving mechanism 32 is in transmission connection with the rotary frame body 33, the first frame body 331 of the rotary frame body is provided with a first inlet 332 and a first outlet 333, when the first frame body 331 of the rotary frame body rotates to one side of the first conveying component 11, the first inlet 332 of the rotary frame body is in butt joint with the tail end of the first conveying component 11, and when the first frame body 331 of the rotary frame body rotates to one side of the second conveying component 21, the first outlet 333 of the rotary frame body is in butt joint with the front end of the second conveying component 21. The driving mechanism 32 may be driven by a motor, hydraulic drive, or the like to drive the rotation of the rotating frame. In the inactivation step, the first frame 331 of the rotating frame rotates to one side of the first conveying member 11, the first inlet 332 of the rotating frame is in butt joint with the tail end of the first conveying member 11, after the first conveying member 11 conveys the cold chain packing boxes through the first group of inactivation members 12, the cold chain packing boxes can enter the first frame 331 through the first inlet 332, the top surface of the cold chain packing boxes entering the first frame 331 faces the top of the first conveying member 11, and the first side surface and the second side surface face both sides of the first conveying member 11. Since the conveying direction of the first conveying member 11 is perpendicular to the conveying direction of the second conveying member 21, the driving mechanism 32 drives the rotating frame 33 to rotate forward 180 ° and then 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 with the front end of the second conveying member 21, so that the bottom surface of the cold chain packing case 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 packing boxes to the second conveying member 21 by carrying or applying a push-pull device to the cold chain packing boxes. Then, the driving mechanism 32 drives the rotating frame 33 to rotate forward 180 degrees or rotate reversely 180 degrees, so that the first inlet 332 of the rotating frame is in butt joint with the tail end of the first conveying part 11 again, and the subsequent cold chain packing box inactivation operation is facilitated.
In the inactivation of the cold chain packing cases, in order to improve the inactivation efficiency, the second frame 334 of the rotating frame has a second inlet 335 and a second outlet 336, when the second frame 334 of the rotating frame rotates to the side of the first conveying member 11, the second inlet 335 of the rotating frame is abutted to the end of the first conveying member 11, and when the second frame 334 of the rotating frame rotates to the side of the second conveying member 21, the second outlet 336 of the rotating frame is abutted to the front end of the second conveying member 21. The driving mechanism 32 drives the rotary frame 33 to sequentially rotate the first frame 331 and the second frame 334 to abut against the first conveying member 11. Of course, it is easy to understand that in practice, not limited to two frames, a plurality of frames may be provided, for example, a third frame of the rotating frame has a third inlet and a third outlet, when the third frame of the rotating frame rotates to the first conveying member 11 side, the third inlet of the rotating frame is abutted with the end of the first conveying member 11, and when the third frame of the rotating frame rotates to the second conveying member 21 side, the third outlet of the rotating frame is abutted with the front end of the second conveying member 21.
In this embodiment, two frames are taken as an example, the second frame 334 is opposite to the first frame 331, when the first frame 331 of the rotating frame rotates to the first conveying member 11 side, the second frame 334 of the rotating frame rotates to the second conveying member 21 side, and when the first frame 331 of the rotating frame rotates to the second conveying member 21 side, the second frame 334 of the rotating frame rotates to the first conveying member 11 side. The rotating frame may be at least two i-shaped frames arranged in parallel, wherein a first opening side of the at least two i-shaped frames forms the first frame 331, and a second opening side of the at least two i-shaped frames forms the second frame 334.
Further, in an embodiment for realizing a turnover handling operation fully automated for cold chain packing cases, the first conveying means 11 comprises a conveyor 111 disposed between at least two i-frames for conveying cold chain packing cases into the rotating frames; the second conveying member 21 includes a conveying roller 211 disposed between at least two i-frames for conveying the cold chain packing cases out of the rotating frame. In the inactivation operation of the cold chain packing box, the cold chain packing box is conveyed by the first conveying component 11, is subjected to the inactivation operation of the first group of inactivation components 12, and is then pushed into the rotating frame by the conveying belt 111. That is, when the first frame 331 is rotated to the first conveying member 11 side, the first frame 331 is pushed into the first frame 331. When the second frame 334 rotates to the side of the first conveying member 11, the second frame 334 is pushed into the second frame 334. During rotation of the rotating frame, the conveyor belt 111 is disposed between at least two of the I-shaped frames, and the conveyor roller 211 is disposed between at least two of the I-shaped frames, so that rotation of the rotating frame is not affected. When the first frame 331 rotates to the first conveying member 11 side, or when the second frame 334 rotates to the first conveying member 11 side, the conveying belt 111 and the conveying rollers 211 are both located at the bottom of the rotating frame, so that the conveying of the cold chain packing boxes in the rotating frame can be achieved (the cold chain packing boxes in the rotating frame can be placed on the conveying belt 111 or the conveying rollers 211).
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the apparatus described above may be referred to with respect to each other. In addition, the "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent the merits and merits of the embodiments.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the present 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 above 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 application's aspects. However, the disclosed apparatus should not be construed as reflecting the intention of: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in 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 adaptively changed and disposed in one or more apparatuses different from the embodiments. The components of the embodiments may be combined into one component, and furthermore 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 elements 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 but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the following claims, any of the claimed embodiments can 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 assembly does not exclude the presence of a plurality of such components or assemblies. The present application may be realized 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 of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the present application in any way, but any simple modification, equivalent variation and modification of the above embodiments according to the technical principles of the present application still fall within the scope of the technical solutions of the present application.
Claims (10)
1. A method for rapidly inactivating the surface of an object in a low-temperature environment, comprising the steps of:
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 generating device, so that the sprayed plasma and the irradiated ultraviolet rays jointly act on the surface to be inactivated;
identifying the thickness of the ice layer on the surface to be deactivated;
and 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.
2. The method for rapid inactivation of a surface of an object in a low temperature environment according to claim 1, wherein spraying plasma on the surface to be inactivated using a low temperature plasma generating device comprises:
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 rapid inactivation of a surface of an object in a low temperature environment according to claim 2, wherein irradiating the surface to be inactivated with ultraviolet light using an ultraviolet 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 generating device.
4. The method for rapid inactivation of a surface of an object in a low temperature environment according to claim 2, wherein irradiating the surface to be inactivated with ultraviolet light using an ultraviolet generating device comprises:
continuously irradiating ultraviolet rays on the surface to be inactivated by adopting an ultraviolet lamp; or (b)
And adopting an optical pulse device to emit full spectrum pulse light to the surface to be inactivated.
5. A method for rapid surface inactivation 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 rapid surface inactivation of an object in a low temperature environment according to claim 5,
the inert gas jet device is an argon gas jet device.
7. The method for rapid surface inactivation of an object in a low temperature environment according to claim 6,
the aperture of each single jet orifice of the low-temperature plasma generating device is phi 5-phi 20mm;
the jet flow speed is set to be 1L/min-10L/min, and the moving speed is set to be 10mm/s-500mm/s.
8. The method for rapid surface inactivation 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 rapid surface inactivation of an object in a low temperature environment according to claim 1,
the sprayed plasma and the irradiated ultraviolet light jointly act on the surface to be inactivated for 0.1-20s.
10. The method for rapid inactivation of a surface of an object in a low temperature environment of claim 1, further comprising:
identifying the intensity of ultraviolet rays 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 rays; and/or
And identifying the gas flow rate sprayed by the low-temperature plasma generating device, and correcting the gas flow rate sprayed by the low-temperature plasma generating device according to the comparison value of the identified gas flow rate and the preset gas flow rate.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6979829B2 (en) * | 2003-04-23 | 2005-12-27 | Clearant Inc. | Devices and methods for determining the amount of energy absorbed during irradiation |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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