CN112675351A - Ultrafast laser light curtain and air purification system - Google Patents
Ultrafast laser light curtain and air purification system Download PDFInfo
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- CN112675351A CN112675351A CN202011530410.9A CN202011530410A CN112675351A CN 112675351 A CN112675351 A CN 112675351A CN 202011530410 A CN202011530410 A CN 202011530410A CN 112675351 A CN112675351 A CN 112675351A
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- 238000004887 air purification Methods 0.000 title claims abstract description 16
- 230000003287 optical effect Effects 0.000 claims abstract description 39
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- 241000894006 Bacteria Species 0.000 abstract description 7
- 244000052769 pathogen Species 0.000 abstract description 7
- 230000003749 cleanliness Effects 0.000 abstract description 3
- 238000000746 purification Methods 0.000 description 11
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- 238000001914 filtration Methods 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
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- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention provides an ultrafast laser curtain and an air purification system, wherein the ultrafast laser curtain comprises a curtain main body and a curtain generating device; the light curtain main body is provided with an input port and an output port which are communicated with the light curtain main body; the laser beam output by the external laser is projected to the light curtain device, and the direction of the laser beam is changed for many times by the laser refraction and reflection device, so that a seamless ultrafast laser light curtain is formed between the input port and the output port. According to the ultrafast laser curtain and the air purification system provided by the invention, the optical curtain is formed between the input port and the output port, under the irradiation of high-power-density pulse laser, viruses, bacteria or other pathogens in the air can be instantly denatured and die, and some small suspended particles can be crushed and even directly gasified, so that air with high cleanliness is generated.
Description
Technical Field
The invention relates to the technical field of air purification, in particular to an ultrafast laser light curtain and an air purification system.
Background
A large amount of liquid and solid particles, including aerosol, smoke, dust, fog and the like, are dispersed and suspended in the air, pollutants such as toxic metals, carcinogens, pathogenic bacteria, viruses and the like can be attached to the particles, and the bacteria and the viruses can survive on the attached matters for a long time. These suspended particles can easily enter the human body through the respiratory tract, and further pose a threat to human life safety. Especially in the environment with large flow, dense crowd or dark and narrow environment, the novel air conditioner can become a hotbed for breeding diseases without the supplement of fresh air.
The existing air purification device mainly realizes the purification of air through ultraviolet radiation, filtration, adsorption and other modes. Ultraviolet rays can be disinfected by destroying nucleic acid of pathogenic bacteria, but the disinfection time is long, the disinfection time is ineffective for suspended matters in the air, and the harm to human bodies is large, such as: easily induce skin cancer, and the generated ozone has large stimulation to respiratory mucosa.
The filtration and adsorption are to adsorb harmful particles in the air by physical or chemical means, but the filtration effect on free pollutants (such as bacteria, viruses and the like) is too poor, and the adsorption device contains a large amount of toxic and harmful substances, so that professionals are required to regularly replace and treat the adsorption device.
Disclosure of Invention
The invention provides an ultrafast laser light curtain and an air purification system, and aims to form a purification device which is wide in application range, has a purification effect close to 100% on various pollutants, and can be widely used in personal living areas, business areas with large people flow and working areas with high requirements on noise and vibration.
The invention provides an ultrafast laser curtain, which comprises a curtain main body and a curtain generating device; the light curtain main body is provided with an input port and an output port which are communicated with the light curtain main body; under the condition that an external laser projects high-peak power density pulse laser to the optical curtain generating device, the optical curtain generating device is used for converting the laser direction for multiple times so as to form a seamless optical curtain between the input port and the output port.
According to the ultrafast laser optical curtain provided by the invention, the optical curtain generating device is a scanning device, and the scanning direction of the scanning device is perpendicular to the direction from the input port to the output port.
According to the ultrafast laser light curtain provided by the invention, the light curtain generating device is a turn-back device; alternatively, the light curtain generating device is a combination of a folding device and a scanning device.
According to the ultrafast laser optical curtain provided by the invention, the turning device comprises two plane mirrors which are opposite at intervals, and the interval direction of the two plane mirrors is vertical to the direction from the input port to the output port;
one of the two plane mirrors is arranged corresponding to the external laser.
According to the ultrafast laser curtain provided by the invention, the external laser is an ultrafast laser or a picosecond laser.
According to the ultrafast laser light curtain provided by the invention, the laser intensity in the area where the light curtain is located is higher than the preset power threshold value.
According to the ultrafast laser optical curtain provided by the invention, a beam shaping device is arranged between the external laser and the optical curtain generating device.
According to the ultrafast laser curtain provided by the invention, the shape of laser emitted by the external laser is Gaussian distribution or sheet distribution.
According to the ultrafast laser optical curtain provided by the invention, the number of the external lasers is multiple, and the number of the optical curtain generating devices is one, so that one optical curtain is formed by the multiple external lasers and one optical curtain generating device; or,
the number of the external lasers is one, and the number of the light curtain generating devices is multiple, so that the multiple light curtains are formed by the multiple external lasers and the multiple light curtain generating devices.
The invention also provides an air purification system which comprises the ultrafast laser curtain.
According to the ultrafast laser curtain and the air purification system provided by the invention, the optical curtain is formed between the input port and the output port, under the irradiation of high-power-density pulse laser, viruses, bacteria or other pathogens in the air can be instantly denatured and die, and some small suspended particles can be crushed and even directly gasified, so that air with high cleanliness is generated.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an ultrafast laser light curtain provided by the present invention;
FIG. 2 is a schematic structural diagram of an optical curtain generating device of the ultrafast laser optical curtain of FIG. 1;
FIG. 3 is a second schematic view of the light curtain generating device of the ultrafast laser light curtain of FIG. 1;
FIG. 4 is a schematic diagram of a beam shaping device of the ultrafast laser light curtain of FIG. 1;
reference numerals:
1: a light curtain body; 11: an input port; 12: an output port;
2: a light curtain generating device; 21: a scanning device; 22: a plane mirror;
3: a light curtain; 4: a beam shaping device; 100: ultrafast laser light curtain.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The ultrafast laser curtain of the present invention will be described below with reference to fig. 1 to 4, for an air purification system, and as shown in fig. 1 and 2, the ultrafast laser curtain 100 includes a curtain main body 1 and a curtain generating apparatus 2.
As shown in fig. 1, the light curtain body 1 is provided with an input port 11 and an output port 12 communicated with the light curtain body; the input port 11 and the output port 12 are respectively connected to a ventilation device of the air purification system, and the air processed by the ultrafast laser optical curtain 100 is output through the output port 12. The specific style of the light curtain body 1 can be set according to actual conditions, for example, as shown in fig. 1, in the present embodiment, the light curtain body 1 is in a square frame shape.
The light curtain generating device 2 may be disposed on the light curtain body 1, and in the case where an external laser projects a high peak power density pulse laser to the light curtain generating device 2, the light curtain generating device 2 is configured to change the direction of the laser light a plurality of times to form a seamless light curtain 3 between the input port 11 and the output port 12. The light curtain generating device 2 can generate a tight curtain-like light curtain (i.e. the light curtain 3) in a certain time by means of scanning, folding back and the like (but not limited to the above-mentioned methods). The external laser can generate high peak power density pulse laser, and the optical curtain 3 formed by reasonably arranging the high peak power density pulse laser sweeps a ventilation area (the ventilation area is the area between the input port 11 and the output port 12) to purify air input from the input port 11, so that pollutants (but not limited to the pollutants) such as haze, viruses, particulate matters and the like can be effectively removed.
The light curtain 3 is formed by a light curtain generating device 2, which may be, but is not limited to, a scanning device, a foldback device, or a combination thereof, and generates a region satisfying a decontamination threshold for a certain period of time. Specifically, as shown in fig. 2, the optical curtain generating device 2 may be a scanning device 21, the scanning direction of the scanning device 21 intersects (e.g., is perpendicular to) the direction from the input port 11 to the output port 12, and the optical curtain generating device 2 may be a high-frequency scanning device such as a galvanometer or a rotating mirror, and reflects the incident light beam at a certain angle, so as to form a region (i.e., the region where the optical curtain 3 is located) satisfying the purification condition due to the rotation of the high frequency of the scanning device; or the light beams can be folded back and forth for multiple times by using a traditional optical reflector, and the adjacent light beams are closely connected to form an area satisfying the purification condition, that is, the light curtain generating device 2 is a folding device, for example, as shown in fig. 3, the light curtain generating device 2 comprisesTwo spaced opposed planar mirrors 22, the direction of spacing of the two planar mirrors 22 intersecting (e.g. perpendicular to) the direction from the input port 11 to the output port 12; one of the two plane mirrors 22 is disposed in correspondence with the external laser. Wherein the purification threshold is a power density threshold required for completely killing various pathogens, and the laser intensity in the region where the light curtain 3 is located is higher than a preset power threshold, for example, the preset power threshold is 1GW/cm2I.e. to ensure that every position in the area where the light curtain 3 is located can reach 1GW/cm2. Therefore, the air flow rate, the repetition frequency of the external laser and the thickness of the optical curtain are required to satisfy a certain relation, air can be ensured to pass through any point in the optical curtain 3 and be swept by the optical curtain 3, and the corresponding laser intensity is higher than 1GW/cm2。
The light curtain 3 is a light curtain formed by the light curtain generating device 2 within a certain time by pulsed light with high peak power generated by using an external laser, the external laser can be an ultrafast laser or a picosecond laser, but is not limited to the ultrafast laser or the picosecond laser, and the external laser is introduced as an ultrafast laser in the following. Wherein, a certain time refers to the first pulse generated by the ultrafast laser with high repetition rate, and all air passing through the region in the certain time is purified before the next pulse arrives. The pulse for purifying air can be, but not limited to, one pulse generated by an ultrafast laser, and can be in the form of a plurality of pulse combs generated by other ways.
In this embodiment, the center wavelength of the beam generated by the ultrafast laser is 200nm-10.6um, the pulse width is less than 1ps, the repetition frequency range is 1Hz-1000MHz, and the laser intensity after focusing is higher than 10GW/cm2The threshold value of (2) is shaped into a certain beam and then is used as incident light to be incident into the light curtain generating device 2.
The beam generated by the ultrafast laser is generally gaussian-shaped, but not limited to gaussian-shaped, and may also be a sheet-shaped beam (but not limited to sheet-shaped) formed by using a special optical path or other beam with special profile, for example, as shown in fig. 4, a beam shaping device 4 is disposed between the external laser and the optical curtain generating device 2, and the beam shaping device 4 is a cylindrical mirror.
Ultrafast laser light curtain 100 is capable of forming a purification zone by generating light curtain 3, the purification zone being the shape of light curtain 3, the shape of light curtain 3 being determined according to the generation mode and threshold requirements. The shape of the light curtain 3 may be fan-shaped, rectangular, circular or other profiles, etc., depending on the different ways of generation, such as scanning or beam folding, etc. In addition, the shape of the light curtain 3 is also related to the purification threshold, and some regions that do not meet the purification threshold cannot be used as light curtain regions.
The light curtain 3 generated by the ultrafast laser light curtain 100 may be a light curtain generated by one light beam or a light curtain generated by one light beam generated by another light beam or may be a light curtain generated by other composite means. For example, a plurality of light curtains generated by a plurality of light beams are combined together, or one light curtain generated by a plurality of light beams together, and correspondingly, the number of the light curtain generating devices 2 is one, so as to form one light curtain 3 by a plurality of external lasers and one light curtain generating device 2; alternatively, the number of the external lasers is one, and the number of the light curtain generating devices 2 is plural, so as to form plural light curtains 3 by one external laser and plural light curtain generating devices 2.
To create a large light curtain area, it is desirable to keep the laser beam from diverging, which can be suppressed using, but not limited to, conventional optics.
The ultrafast laser light curtain 100 has the following advantages:
1. the light curtain 3 obtained by strict calculation is internally and tightly arranged with beams emitted by ultrafast lasers with infrared wavelengths or other wavelengths, and the laser intensity of all positions in the area is higher than 10GW/cm2(ii) a Under the irradiation of high-power-density laser, viruses, bacteria or other pathogens in the air can be denatured and killed, some small suspended particles can be crushed and even directly gasified, and substances such as larger pests and the like can be directly killed and even gasified under the irradiation; since the light curtain 3 mainly irradiates the contaminant with the ultrafast laser with high peak power, it dies and even is vaporized, and no other additional substance (such as ozone or other substance) is generated; in addition, what is moreAlthough the used ultrafast laser has high peak power, the required average power is lower, the ultrafast laser is different from the traditional high-temperature killing, the energy consumption is lower, and the efficiency is higher;
2. the optical curtain 3 generated by the ultrafast laser optical curtain 100 can select different generation modes according to different environments, and is matched with ultrafast lasers with different parameters, and finally the optical curtain with different sizes and shapes, purification threshold values or other parameters can be generated, so that the optical curtain 100 with the larger shape can be selected to be applied to various scenes, for example, in public places with larger people flow, so as to increase the air flow and further increase the air purification efficiency; in the workplaces with high requirements on the environment, such as operating rooms, laboratories and the like, the light curtain 3 of the traditional optical folding device can be selected, so that the noise is minimized; the application scenario of the ultrafast laser light curtain 100 includes, but is not limited to, the use in the above-mentioned places, and the ultrafast laser light curtain 100 can be applied to various environments.
3. The high-power-density irradiation mode can kill various pathogens such as viruses and bacteria, has no selectivity, has the disinfection efficiency close to one hundred percent, and is favorable for places such as hospitals and large markets where a large number of pathogens exist or places with large pedestrian flow.
The invention also provides an air purification system which comprises the ultrafast laser curtain.
According to the ultrafast laser curtain and the air purification system provided by the invention, the optical curtain is formed between the input port and the output port, under the irradiation of high-power-density pulse laser, viruses, bacteria or other pathogens in the air can be instantly denatured and die, and some small suspended particles can be crushed and even directly gasified, so that air with high cleanliness is generated.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An ultrafast laser optical curtain is characterized by comprising an optical curtain main body and an optical curtain generating device;
the light curtain main body is provided with an input port and an output port which are communicated with the light curtain main body;
under the condition that an external laser projects high-peak power density pulse laser to the optical curtain generating device, the optical curtain generating device is used for converting the laser direction for multiple times so as to form a seamless optical curtain between the input port and the output port.
2. The ultrafast laser curtain of claim 1, wherein the curtain generating device is a scanning device, and a scanning direction of the scanning device is perpendicular to a direction from the input port to the output port.
3. The ultrafast laser light curtain of claim 1, wherein the light curtain generating device is a foldback device; alternatively, the light curtain generating device is a combination of a folding device and a scanning device.
4. The curtain of claim 3 wherein said fold return means comprises two spaced opposed flat mirrors spaced in a direction perpendicular to the direction from said input port to said output port;
one of the two plane mirrors is arranged corresponding to the external laser.
5. The ultrafast laser curtain of claim 1, wherein the external laser is an ultrafast laser or a picosecond laser.
6. The ultrafast laser light curtain of claim 1, wherein the laser intensity in the region where said light curtain is located is above a preset power threshold.
7. The ultrafast laser curtain of claim 1, wherein a beam shaping device is disposed between said external laser and said curtain generating device.
8. The curtain of claim 1 wherein the external laser emits laser light in a gaussian or lamellar pattern.
9. The ultrafast laser curtain of light as claimed in claim 1, wherein the number of said external laser is plural, and the number of said curtain generating means is one, for forming one said curtain by plural said external lasers and one said curtain generating means; or,
the number of the external lasers is one, and the number of the light curtain generating devices is multiple, so that the multiple light curtains are formed by the multiple external lasers and the multiple light curtain generating devices.
10. An air purification system comprising an ultrafast laser light curtain as claimed in any one of claims 1 to 9.
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| CN202011530410.9A CN112675351A (en) | 2020-12-22 | 2020-12-22 | Ultrafast laser light curtain and air purification system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406794A (en) * | 2021-06-23 | 2021-09-17 | 辽宁大学 | Laser optical path system with laser biological inactivation function |
| CN113599561A (en) * | 2021-08-03 | 2021-11-05 | 辽宁大学 | Method for killing microorganisms in air by using laser light path system |
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| CN102389583A (en) * | 2011-06-24 | 2012-03-28 | 深圳大学 | Sterilization system |
| CN110486840A (en) * | 2019-08-16 | 2019-11-22 | 武汉虹拓新技术有限责任公司 | It is a kind of based on femtosecond laser air sterilization antivirus go haze device and air-conditioning system |
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| CN111920998A (en) * | 2020-09-28 | 2020-11-13 | 武汉光谷航天三江激光产业技术研究院有限公司 | Ultraviolet laser and LED light composite disinfection device and method |
| CN111939304A (en) * | 2020-10-19 | 2020-11-17 | 武汉光谷航天三江激光产业技术研究院有限公司 | Laser virus killing device based on beam shaping and refraction and reflection control |
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2020
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Patent Citations (5)
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| CN102389583A (en) * | 2011-06-24 | 2012-03-28 | 深圳大学 | Sterilization system |
| CN110486840A (en) * | 2019-08-16 | 2019-11-22 | 武汉虹拓新技术有限责任公司 | It is a kind of based on femtosecond laser air sterilization antivirus go haze device and air-conditioning system |
| CN111603599A (en) * | 2020-05-09 | 2020-09-01 | 福建新位激光科技有限公司 | Air curtain type laser aerosol disinfection device and use method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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Application publication date: 20210420 |