WO2015043135A1 - 一种紫外灭菌消毒装置及其设置方法 - Google Patents
一种紫外灭菌消毒装置及其设置方法 Download PDFInfo
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- WO2015043135A1 WO2015043135A1 PCT/CN2014/072065 CN2014072065W WO2015043135A1 WO 2015043135 A1 WO2015043135 A1 WO 2015043135A1 CN 2014072065 W CN2014072065 W CN 2014072065W WO 2015043135 A1 WO2015043135 A1 WO 2015043135A1
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- WIPO (PCT)
- Prior art keywords
- ultraviolet
- sterilization
- lamp
- current density
- inner diameter
- Prior art date
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- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 210
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000001954 sterilising effect Effects 0.000 claims description 94
- 238000006243 chemical reaction Methods 0.000 claims description 79
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 45
- 229910052753 mercury Inorganic materials 0.000 claims description 21
- 229910045601 alloy Inorganic materials 0.000 claims description 18
- 239000000956 alloy Substances 0.000 claims description 18
- 238000005286 illumination Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 16
- 239000011941 photocatalyst Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 10
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 6
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052718 tin Inorganic materials 0.000 claims description 4
- ABLUEBBVUBRMKA-UHFFFAOYSA-N [Bi].[Hg].[Pb].[Sn] Chemical compound [Bi].[Hg].[Pb].[Sn] ABLUEBBVUBRMKA-UHFFFAOYSA-N 0.000 claims description 3
- WKBCLXNIIALEKI-UHFFFAOYSA-N [Hg].[Sn].[In].[Bi] Chemical compound [Hg].[Sn].[In].[Bi] WKBCLXNIIALEKI-UHFFFAOYSA-N 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 231100000946 Benchmark Dose Toxicity 0.000 claims 1
- 229910052738 indium Inorganic materials 0.000 claims 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims 1
- 239000007789 gas Substances 0.000 description 17
- 230000008859 change Effects 0.000 description 12
- 231100000628 reference dose Toxicity 0.000 description 11
- 238000005457 optimization Methods 0.000 description 10
- 229910000497 Amalgam Inorganic materials 0.000 description 9
- 230000000249 desinfective effect Effects 0.000 description 9
- 244000005700 microbiome Species 0.000 description 8
- 241000700605 Viruses Species 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000001307 helium Substances 0.000 description 7
- 229910052734 helium Inorganic materials 0.000 description 7
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 6
- 229910052787 antimony Inorganic materials 0.000 description 5
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- -1 antimony indium tin-mercury Chemical compound 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- CFQGDIWRTHFZMQ-UHFFFAOYSA-N argon helium Chemical compound [He].[Ar] CFQGDIWRTHFZMQ-UHFFFAOYSA-N 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 208000015181 infectious disease Diseases 0.000 description 3
- 230000002458 infectious effect Effects 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- DAEJUPKPHRBQHZ-UHFFFAOYSA-N [Sn].[Hg] Chemical compound [Sn].[Hg] DAEJUPKPHRBQHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000004887 air purification Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- SYQQWGGBOQFINV-FBWHQHKGSA-N 4-[2-[(2s,8s,9s,10r,13r,14s,17r)-10,13-dimethyl-17-[(2r)-6-methylheptan-2-yl]-3-oxo-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-2-yl]ethoxy]-4-oxobutanoic acid Chemical compound C1CC2=CC(=O)[C@H](CCOC(=O)CCC(O)=O)C[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 SYQQWGGBOQFINV-FBWHQHKGSA-N 0.000 description 1
- 208000032170 Congenital Abnormalities Diseases 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- HAJSAMWEJAAESW-UHFFFAOYSA-N [In].[SnH4] Chemical compound [In].[SnH4] HAJSAMWEJAAESW-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- XMPZLAQHPIBDSO-UHFFFAOYSA-N argon dimer Chemical compound [Ar].[Ar] XMPZLAQHPIBDSO-UHFFFAOYSA-N 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000013618 particulate matter Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- 238000010998 test method Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 239000011787 zinc oxide Substances 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
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultraviolet radiation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
Definitions
- the invention relates to the field of air purification technology, in particular to an ultraviolet sterilization and disinfection device and a setting method thereof. Background technique
- UV disinfection technology is widely used in various sterilization and disinfection fields, and the ultraviolet source can be ultraviolet
- UV mercury vapor discharge lamps etc.
- UV disinfection it is also possible to kill harmful substances in the air by ultraviolet disinfection to achieve the purpose of improving air quality.
- Ultraviolet light destroys the DNA and RNA of microorganisms and kills microorganisms.
- Ultraviolet rays have a decomposing effect on some harmful organic substances, and are better combined with ozone, hydrogen peroxide and the like.
- the UV dose determines the effectiveness of UV sterilization, ie: micro-kill rate, primary removal rate of harmful organic matter.
- UV dose UV illuminance X irradiation time, theoretically, to kill bacteria, viruses and other microorganisms in the ultraviolet irradiation area at one time, each of the ultraviolet irradiation areas (each colony unit) bacteria, Microorganisms such as viruses are able to receive a sufficient dose of ultraviolet radiation.
- low UV illuminance can be used to achieve disinfection by prolonging the irradiation time. Such methods are easier to implement.
- this method has certain congenital defects: that is, in order to prolong the ultraviolet irradiation time, it is usually necessary to increase the area or volume of the ultraviolet source irradiation disinfection area, thereby achieving the purpose of thorough disinfection, and therefore the method is not practical.
- many UV sterilization devices are affected by volume and cost. Low ultraviolet illumination and short irradiation time are used. The number of irradiations is increased by circulating drainage, and the sterilization efficiency is very low.
- the existing ultraviolet purifying and disinfecting devices for air purifiers and central air-conditioning airflow pipes generally use 4W, 8W, 15W, 20W, 30W, 40W conventional mercury vapor discharge ultraviolet lamps, lamp current density or power density is low, ultraviolet irradiance Low, there is no effective UV sterilization chamber.
- the time for the air to flow through the UV irradiation area is short.
- the actual UV dose is much smaller than the UV dose required for sterilization. It is achieved by multiple cycles combined with filtration. Sterilization effect, low disposable sterilization rate, For highly infectious, highly pathogenic bacteria and viruses, there is still a big risk.
- a small-power UV lamp with an outer diameter of 15mm4W is used, combined with photocatalyst, the body is coated with titanium dioxide, the wind speed is 1.5m/s, and the ultraviolet dose is much less than lmJ/cm 2 .
- Photocatalyst can not be quickly sterilized, and the system as a whole cannot achieve good sterilization and disinfection functions.
- Another example is a medical hand-pushing UV sterilization and sterilization vehicle.
- the sterilization and disinfection chamber is a rectangular sterilization chamber: 60cm long, 40cm wide and 10cm high. Three H-type UV lamps are placed side by side. The UV lamp diameter is 19mm and the power is 40W.
- the wind speed is 2.0 m/s
- the minimum illuminance at the edge is: 5 mW/cm 2
- the average ultraviolet dose is about 0.3 mJ/cm 2 (mWs/cm)
- the flow rate per second is 0.48 m3.
- the proposed baseline dose is 5 mJ/cm 2 (mWs/cm 2 ) and the baseline flow rate is 10 m3/h (0.00278 m3/s or 0.00278 cubic meters per second).
- the reference dose of 5 mJ/cm 2 was reached, and the flow ratio of the volume of the ultraviolet sterilization chamber to the unit time (per second) was 0.83.
- the power of the UV lamp required to reach the reference dose of 5 mJ/cm and the reference flow rate of 10 m3/h is 23.2W.
- UV air disinfection devices are usually designed with a single cartridge.
- the UV dose is often much smaller than the required biological dose.
- the one-time sterilization and disinfection efficiency is low, and the overall sterilization and disinfection efficiency is not satisfactory.
- the ultraviolet lamp for air disinfection has a tube current density of less than 0.2 A / cm 2 , and the ultraviolet illuminance value around the lamp is low.
- a large number of ultraviolet lamps and a long ultraviolet disinfection are required. Cavity.
- the prior art is used to increase the ultraviolet dose and improve the efficiency of one-time sterilization and disinfection.
- volume V of the sterilization chamber and UV dose J and flow Q ratio V / (JQ) and UV lamp power P and UV dose J and flow Q ratio P / (JQ) are two measures of the performance of the UV sterilization device Important indicators.
- the ratio of the flow rate per second ie, l m3 per second
- the reference dose is 5 mJ/cm 2
- the lamp power required for the reference flow rate of 10 m3/h is >22.0 W.
- the technical problem to be solved by the embodiments of the present invention is to provide an ultraviolet sterilization and disinfection device and a setting method thereof, as far as possible, while increasing the ultraviolet dose, rapid sterilization (ie, increasing the one-time killing rate or removal rate), Reduce the volume of the UV disinfection device, reduce the cost of the sterilization and disinfection device, and take into account the energy consumption of the sterilization and disinfection device.
- the ultraviolet sterilization method and the device thereof can quickly reduce the microorganisms in the confined space to a non-treatment concentration and ensure public health safety.
- an embodiment of the present invention provides an ultraviolet sterilization and disinfection device, wherein the ultraviolet sterilization and disinfection device is provided with one or more low-pressure ultraviolet lamps, and the inner diameter of the low-pressure ultraviolet lamps is ⁇ 30-36 ⁇ , Tube current density: 0.250-0.800 A/cm 2 ; or , inner diameter ⁇ 26-30 ⁇ , tube current density: 0.280-0.850 A/cm2; or, inner diameter D 20-26mm, tube current density: 0.300-1.100 A/cm2 Or, the inner diameter is ⁇ 15-20 ⁇ , the tube current density is 0.340-1.350 A/cm 2 ; or the inner diameter is ⁇ 12-15 ⁇ 3 ⁇ 4 tube current density 0.335-1.000 A/cm 2 ; or, the inner diameter is ⁇ 10-12 ⁇ , Tube current density 0.300-1.000 A/cm2 ; or , inner diameter ⁇ 8-10 ⁇ 3 ⁇ 4 tube current density 0.300-0.900 A/cm2; or, inner diameter ⁇ 5-8 ⁇ , tube current density
- the tube diameter and tube current density are optimized to increase the UV lamp power density.
- the low-pressure UV lamp is set to U-shaped, ⁇ -shaped, H-shaped, double-U-shaped, double-twisted, double-H, three-U, three-turn, three-H, four-U, four-inch according to the structure of the cavity.
- Various shapes such as type, four H type, W type, M type, UH connection type, ⁇ - ⁇ connection type, etc., to meet the requirements of small footprint and uniform distribution of ultraviolet illuminance.
- the electrodeless low-pressure ultraviolet lamp is arranged according to the structure of the cavity, and the electrodeless low-pressure ultraviolet lamp is arranged in various ring-shaped shapes such as a ring shape, a rectangular shape, a square shape, an elliptical shape, etc., so as to satisfy a small occupied space and a uniform distribution of ultraviolet illuminance. Claim.
- the apparatus also includes an adjustment module that adjusts the power of the low pressure ultraviolet lamp to adjust the ultraviolet dose of the gas stream.
- the ultraviolet disinfection device can adjust the ultraviolet dose to improve the adaptability of the sterilization and disinfection device, and ensure a high kill rate for microorganisms with high ultraviolet dose requirements;
- the equipment operation can set the initial full-load operation and reduce the power consumption operation under the general sterilization and disinfection state, and the ultraviolet dose adjustment is beneficial to reduce the energy consumption of the device operation.
- UV dose adjustment is achieved with a low-voltage UV lamp with adjustable power. When the lamp current drops, the power decreases. When the mercury vapor pressure in the lamp is effectively controlled near the optimum mercury vapor pressure required for the lamp, the 253.7nm UV conversion efficiency of the lamp will not decrease or even increase.
- the choice of tube current density and the control of mercury vapor pressure are two key balancing factors.
- the tube current density is selected with upper and lower limits. When the current density changes, the wall temperature changes, the mercury vapor pressure in the lamp changes, and the upper and lower limits of the current density need to effectively control the mercury vapor pressure, all of which need to be optimized by testing.
- the ultraviolet sterilization and disinfection device has a wind speed of l-5 m/s, a small change in the wall temperature of the lamp, a small change in the mercury vapor pressure in the lamp, a small change in the ultraviolet output of the lamp, and a stable ultraviolet dose. To achieve this, it is also necessary to balance the tube current density and control the mercury vapor pressure.
- the ambient temperature changes from 10-35 °C, or changes within 30 °C and 40 °C, and the ultraviolet output of the lamp changes little, and the ultraviolet dose is stable.
- the ultraviolet sterilization and disinfection device has high ultraviolet conversion efficiency when adjusting the ultraviolet output power.
- the optimized inner diameter and tube current density of the low-pressure ultraviolet lamp are: inner diameter ⁇ 30-36 mm, tube current density: 0.400-0.750 A/cm 2 ; or, inner diameter ⁇ 26-30 ⁇ , tube current density: 0.450-0.800 A/cm 2 ; or , the inner diameter is ⁇ 20-26 ⁇ , the tube current density is 0.450-1.050 A/cm2; or, the inner diameter is ⁇ 15-20 ⁇ , the tube current density is 0.450-1.300 A/cm 2 ; or The inner diameter is ⁇ 12-15 ⁇ , the tube current density is 0.450-0.950 A/cm 2 ; or , the inner diameter is ⁇ 10-12 ⁇ , the tube current density is 0.400-0.950 A/cm2; or, the inner diameter is ⁇ 8- 10mm, the tube current density 0.400-0.850 A/cm2 ; or , the inner diameter is ⁇ 5-8 ⁇ , the tube current density is 0.400-0.750 A/cm 2 ; or the inner diameter is ⁇ 3-5 ⁇ , and
- the low-pressure ultraviolet lamp is set to:
- the tube current density is one of the following parameters: 0.450-0.500 A/cm 2 , 0.500-0.550 A/cm 2 , 0.550-0.600 A/cm 2 , 0.600-0.650 A/cm 2 , 0.650- 0.700 A/cm 2 , 0.700-0.750 A/cm2 ; or,
- Inner diameter (D26-30mm, tube current density is one of the following parameters: 0.350-0.400 A/cm 2 , 0.400-0.450A/cm2, 0.450-0.500A/cm 2 , 0.500-0.550A/cm 2 , 0.550 -0.600 A/cm 2 , 0.600-0.650 A/cm 2 , 0.650-0.700 A/cm 2 , 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 ; or,
- the inner diameter (D20-26mm, tube current density is one of the following parameters: 0.400-0.450 A / cm 2, 0.450-0.500 A / cm2, 0.500-0.550A / cm 2, 0.550-0.600 A / cm 2, 0.600 - 0.650 A/cm 2 , 0.650-0.700 A/cm2, 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800-0.850 A/cm2, 0.850-0.900 A/c
- Inner diameter (D 15-20mm, tube current density is one of the following parameters: 0.450-0.500 A/cm 2 , 0.500-0.550 A/cm 2 , 0.550-0.600 A/cm 2 , 0.600-0.650 A/cm 2 , 0.650-0.700A/cm 2 , 0.700-0.750A/cm2 , 0.750-0.800A/cm 2 , 0.800-0.850A/cm 2 , 0.850-0.900 A/cm2, 0.900-0.950A/cm2, 0.950- l.OOOA /crm, 1.000-1.050 A/cm 2 , 1.050-1.000 A/cm 2 , 0.950- 1.100 A/cm 2 , 1.100-1.150 A/cm 2 , 1.150-1.200 A/cm 2 , 1.200-1.250 A/cm 2 , 1.250 -1.300A/cm 2 ; or
- Inner diameter (D 12-15mm, tube current density is one of the following parameters: 0.450-0.500A/cm 2 , 0.500-0.550A/cm2, 0.550-0.600 A/cm 2 , 0.600- 0.650A/cm 2 , 0.650-0.700 A/cm 2 , 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800-0.850 A/cm 2 , 0.850-0.900 A/cm 2 , 0.900-0.950 A/cm 2 ;
- the inner diameter (D 10-12mm, tube current density is one of the following parameters: 0.400-0.450 A / cm 2, 0.450-0.500 A / cm2, 0.500-0.550A / cm 2, 0.550-0.600 A / cm 2, 0.600-0.650 A/cm 2 , 0.650-0.700 A/cm2, 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800-0.850 A/cm2, 0.850-0.900 A/cm 2 , 0.900- 0.950 A /cm 2 ; or,
- the inner diameter (D8-10mm, tube current density is one of the following parameters: 0.400-0.450 A / cm 2, 0.450-0.500 A / cm2, 0.500-0.550A / cm 2, 0.550-0.600 A / cm 2, 0.600 - 0.650 A/cm 2 , 0.650-0.700 A/cm2, 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800-0.850 A/cm2 ;
- the inner diameter (D5-8mm, tube current density is one of the following parameters: 0.400- 0.450 A / cm 2, 0.450- 0.500 A / cm2, 0.500-0.550A / cm 2, 0.550-0.600 A / cm 2, 0.600 - 0.650 A/cm 2 , 0.650-0.700 A/cm2, 0.700-0.750 A/cm 2 ; or,
- the inner diameter (D 3-5mm, tube current density is one of the following parameters: 0.400-0.450 A / cm 2, 0.450-0.500 A / cm2, 0.500-0.550A / cm 2, 0.550-0.600 A / cm 2, 0.600-0.650 A/cm 2 , 0.650-0.700 A/cm 2 , 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800-0.850 A/cm 2 .
- the low-pressure ultraviolet lamp is set to: inner diameter ⁇
- the low-pressure ultraviolet lamp comprises: a discharge capacitor and a discharge device for maintaining an electron discharge in the discharge vessel, wherein the discharge vessel has a sealed discharge space inside, and the discharge space contains mercury or an amalgam, a rare gas.
- the material for controlling the vapor pressure of mercury in the low-pressure ultraviolet lamp is liquid mercury.
- the material for controlling the mercury vapor pressure of the low-pressure ultraviolet lamp is an alloy containing antimony indium tin-mercury or an alloy containing antimony, lead, and tin-mercury.
- the liquid mercury is built in the discharge chamber of the low-pressure ultraviolet lamp.
- the exhaust pipe of the low-pressure ultraviolet lamp or the connecting member of the low-pressure ultraviolet lamp that does not pass the airflow is at a temperature of 75-95 ° C, 85-105 ° C, 95-135 ° C, built in
- the material that controls the vapor pressure of mercury is an alloy containing 4 indium tin hydride.
- the temperature is 60-90 ° C, 65-95 ° C, 65-105 ° C, 70-115 At °C, the material built into the mercury vapor pressure control is an alloy containing antimony, lead, and tin.
- the rare gas filled in the low-pressure ultraviolet lamp is a helium or argon-argon mixture, preferably an argon-helium mixture, and further preferably an argon-helium mixture having a helium content of more than 50% or a helium content of more than 70 % argon-helium mixture.
- Embodiments of the present invention provide a method for setting an ultraviolet sterilization and disinfection apparatus, including the optimization and design of the aforementioned low-pressure ultraviolet lamp, environmental changes such as temperature and wind speed changes, and optimization and design of power adjustment. Also includes:
- the size, structure, and tube current density of each of the positionally adjusted low pressure ultraviolet lamps are determined in accordance with predetermined ultraviolet dose requirements.
- the flow field of the airflow is analyzed by ANSYS or similar fluid analysis software to make the flow field distribution uniform.
- an average illuminance value of each node in the predetermined discrete grid may be obtained according to the following formula:
- E is the ultraviolet intensity
- P is the ultraviolet power
- ⁇ is the half angle between the UV intensity node and the UV lamp arc length to be calculated
- L is the discharge arc length of the UV lamp
- D is the UV intensity node distance lamp to be calculated Normal distance.
- the ultraviolet sterilization and disinfection device designed according to the invention comprises a fan, an air inlet, a sterilization and disinfection chamber, and an air outlet.
- the sterilization and disinfection module in the sterilization chamber contains at least one ultraviolet module, and the ultraviolet module adopts the optimized low-pressure ultraviolet lamp, and Reasonable design of UV illumination and flow field.
- the sterilization and disinfection module further comprises one or more of a photocatalyst module, an electrostatic module, a filter module, and an ozone module.
- the ultraviolet sterilization and disinfection device comprises a light-shielding baffle
- the light-shielding baffle is a grid bar structure, and each of the grids includes a bent light-shielding flow guiding portion and at least one straight plate along the air flow direction. Straight plate diversion section.
- the light shielding baffle is a metal plate, and different voltages are applied on the light shielding baffle to make the light shielding baffle have an electrostatic adsorption function at the same time.
- the sterilization and disinfection module has at least one detachable embedded structure, and the ultraviolet module, the photocatalyst module, the electrostatic module, the filter module, and the ozone module may all be detachable embedded structures. It can be loaded and unloaded separately, or multiple sterilization and disinfection modules can be connected by connectors, which can be integrated and unloaded.
- the sterilizing and disinfecting module of the detachable embedded structure is directly embedded in the pre-made card slot of the ultraviolet sterilizing device;
- the sterilizing and disinfecting module of the detachable embedded structure is connected to the ultraviolet sterilizing device by a spring snap, a snap fastener or the like;
- the sterilizing and sterilizing module of the detachable embedded structure is tightly connected by a screw or a casing Connected to the UV sterilization equipment described.
- the ultraviolet illuminance around the low-pressure ultraviolet lamp is improved, that is, the ultraviolet radiation dose received by the airflow flowing through the sterilization and disinfection chamber is increased, which can be extremely
- the earth improves the sterilization and disinfection efficiency of the device; in addition, the shape of the ultraviolet irradiation region is compressed, and then the specific node position of the ultraviolet lamp and the ultraviolet illuminance corresponding to each node are obtained by discrete and re-integration, and the lamp pairs are comprehensively considered. Calculate the influence of the points so that the illumination of the UV lamps at different positions is more reasonable, and the ultraviolet illuminance in the entire device is uniform.
- UV sterilization and disinfection device ensures the safety by setting the light-shielding and diversion structure to avoid ultraviolet leakage.
- the shell is designed as a device with different performances; the sterilization and disinfection performance can also be adjusted according to the needs of the use place at different times.
- FIG. 1 is a specific embodiment of a method for setting an ultraviolet sterilization device according to an embodiment of the present invention
- FIG. 2 is another embodiment of a method for setting an ultraviolet sterilization device according to an embodiment of the present invention.
- FIG. A schematic cross-sectional view of three different shaped sterilization chambers in the example;
- FIG. 4 is a schematic diagram of dividing a discrete mesh into three different shapes of cross-section as shown in FIG. 3;
- FIG. 5 is a schematic diagram showing the meanings of a, L and D in the embodiment of the present invention.
- Figure 6 is a schematic view showing the structure of the ultraviolet sterilization and disinfection device. Detailed ways
- the ultraviolet sterilizing and disinfecting device and the setting method thereof provided by the invention provide a sterilizing and disinfecting device which is suitable for human and animal activities, and can be quickly, safely and continuously effective.
- the ultraviolet sterilizing and disinfecting device has the following characteristics: 1. ultraviolet dose Large, that is, one-time sterilization and sterilization efficiency is high. 2, sterilization and sterilization cavity body Small size, low cost, and easy to install. 3, UV light 253.7nm ultraviolet energy conversion efficiency, UV illuminance distribution are hooked, power adjustable, comprehensive energy utilization efficiency. 4, wind speed, ambient temperature and other factors change, sterilization and disinfection effect is good. 5, no UV leakage, good safety. 6. Easy to install, disassemble and maintain, the function can be flexibly adjusted.
- the ultraviolet sterilization and disinfection device and the setting method thereof provided by the invention are sterilized and disinfected by a newly designed low-pressure ultraviolet lamp, with a reference dose of 5 mJ/cm 2 and a reference flow rate of 10 m 3 /h ( 0.00278 m 3 /s or 0.00278 cubic meters per In seconds, the reference dose is 5mJ/cm 2 , and the ratio of the volume of the UV sterilization chamber to the flow rate per second is ⁇ 0.8.
- the ratio is different according to the actual device structure and performance requirements.
- the ratio may be ⁇ 0.75, ⁇ 0.70. , ⁇ 0.65, ⁇ 0.60, ⁇ 0.55, ⁇ 0.50, ⁇ 0.45, ⁇ 0.40, ⁇ 0.35, ⁇ 0.30 or ⁇ 0.25.
- the lamp power required to reach the reference dose of 5mJ/cm 2 and the reference flow rate of 10 m3/h is ⁇ 22.0W.
- the value is different depending on the actual device structure and performance requirements. The value may be ⁇ 21.5W, ⁇ 21.0W, ⁇ 20.5. W, ⁇ 20.0W, ⁇ 19.5W, ⁇ 19.0W, ⁇ 18.5W, ⁇ 18.0W, ⁇ 17.5W, ⁇ 17.0W, ⁇ 16.5W, ⁇ 16.0W, ⁇ 15.5W, ⁇ 15.0W, ⁇ 14.5W or ⁇ 14.0W.
- Reducing the volume of the UV sterilization chamber can be achieved in several ways: 1.
- the tube current density is increased, and the ultraviolet illuminance value in the sterilization chamber is increased, and the target ultraviolet dose is achieved, and the ultraviolet irradiation time can be reduced, that is, the volume is reduced.
- the structure is optimized, the ultraviolet illuminance is uniform, the flow field is uniform, or the ultraviolet illuminance is matched with the flow field, so that the ultraviolet dose at each point in the space is uniform, which helps to shorten the time of ultraviolet irradiation and reduce the volume.
- the ultraviolet illuminance of the sterilization and disinfection chamber is further improved by the ultraviolet reflective layer.
- the reduction of energy consumption can be achieved in several ways: 1. Although the 253.7nm UV energy conversion efficiency will decrease when the tube current density increases, the correct selection of the arc length of the lamp by the optimal matching of the gas and the amalgam in the lamp can Taking into account the energy conversion efficiency of 253.7nm ultraviolet light, it can even be improved compared with ordinary UV lamps. 2, the structure is optimized, the UV dose is uniform at each point in the space, and the UV energy required to achieve the same ultraviolet dose is reduced. 3. Improve the utilization of ultraviolet rays through the ultraviolet reflective layer. 4. Adjust the power to reduce the power consumption in the general sterilization and disinfection state, reduce the energy consumption, and the energy conversion efficiency of the 253.7nm ultraviolet light is improved under the state of reducing power consumption. 5.
- the tube current density increases, the tube diameter decreases, the flow resistance decreases, and the effective cross-sectional area of the fluid flows increases, increasing the flow rate of the fluid for the same sterilizing chamber section and the same flow rate, and correspondingly reducing The lamp power per unit flow.
- the inventors have found that in order to reduce the volume of the sterilization and disinfection chamber of the ultraviolet sterilization and disinfection device, This can be achieved by increasing the power of the UV lamp, ie increasing the tube current or tube current density while ensuring a higher UV conversion efficiency.
- a low-pressure ultraviolet lamp using different tube currents or tube current densities is optimized or designed for each tube diameter of the ultraviolet lamp. Further, the optimization and design of the filling gas and the mercury source in the ultraviolet lamp can further improve the ultraviolet conversion efficiency.
- Test phase In the high and low temperature chamber, select the tube current corresponding to the tube current density of 0.6-0.8A/cm, test the change characteristics of ultraviolet illuminance and liquid mercury temperature, and obtain the saturation corresponding to the maximum ultraviolet illuminance of each tube diameter.
- Mercury vapor pressure that is, the optimum mercury vapor pressure corresponding to each pipe diameter.
- Tube current density tube current / tube internal cross-sectional area
- the tube current density upper limit value is determined according to the set minimum ultraviolet conversion efficiency. From Table 1, the tube current density range corresponding to each specific tube diameter range can be preliminarily determined. :
- the inner diameter of 35.0 mm is selected to be a tube current density of 0.850 A/cm 2 and the ultraviolet conversion efficiency ⁇ > 30%.
- the tube current density is selected: 0.800 A/cm 2
- the ultraviolet conversion efficiency ⁇ is 29.0 mm
- the tube current density is 0.900 A/cm 2
- the tube current density is selected: 0.850 A/cm 2
- the ultraviolet conversion efficiency ⁇ is 22.0 mm
- the tube current density is 1.150 A/cm 2
- the tube current density ⁇ 1.100 A/cm 2
- the ultraviolet conversion efficiency ⁇ and the inner diameter of 17.0 mm were selected to obtain a tube current density of 1.400 A/cm 2 and an ultraviolet conversion efficiency ⁇ > 30%.
- the tube current density is selected: ⁇ 1.350 A/cm 2
- the ultraviolet conversion efficiency ⁇ is 13.6 mm
- the tube current density is 1.050 A/cm 2
- the tube current density is selected: ⁇ 1.000 A/cm 2 , the ultraviolet conversion efficiency ⁇ is 10.8 mm, and the tube current density is ⁇ 1.050 A/cm 2 , and the ultraviolet conversion efficiency ⁇ > 30%.
- the tube current density was selected: ⁇ 1.000 A/cm 2 , the ultraviolet conversion efficiency ⁇ was 9.0 mm, and the tube current density was ⁇ 0.950 A/cm 2 , and the ultraviolet conversion efficiency ⁇ > 25 %.
- select the tube current density ⁇ 0.900 A/cm 2 , UV conversion efficiency ⁇
- the inner diameter is 7.0 mm, and the tube current density is selected: ⁇ 0.850 A/cm2, and the ultraviolet conversion efficiency ⁇ > 25 %.
- the tube current density is selected: 0.800 A/cm 2 , and the ultraviolet conversion efficiency ⁇ > .
- the inner diameter is 4.0 mm, and the tube current density is selected to be ⁇ 0.950 A/cm 2 , and the ultraviolet conversion efficiency ⁇ > 25 %.
- the tube current density is selected: 0.900 A/cm 2 , and the ultraviolet conversion efficiency ⁇ > .
- the tube current density corresponding to each tube diameter range is further determined, see Table 2.
- the tube wall of the lamp is high, and amalgam must be used to control the mercury vapor pressure; the inventors have unexpectedly found that when the gas flow rate is l-5 m/s, the mercury source is used. Liquid mercury also ensures high UV conversion efficiency due to the heat transfer of the gas stream during gas sterilization and sterilization. The cold end of the mercury vapor pressure is controlled.
- This design liquid mercury is built into the discharge chamber of the low-pressure ultraviolet lamp. Another design is to fix the amalgam to a specific position on the inner wall of the quartz tube of the low-pressure ultraviolet lamp.
- the position is the junction of the fixed lamp, where the airflow does not flow, the heat conduction is poor, and the temperature is relatively high, such as a fixed connection.
- the temperature of this connection varies from 60-130 °C, depending on the current and connection structure and material of the lamp.
- the output change is less than 10%. That is, when the environment is bad or the change is large, the sterilization effect can be ensured.
- the high wind speed and low current density meet the minimum value of the set UV conversion efficiency, and the corresponding tube current density is the lower limit of the tube current density.
- the air flow rate is set to be l-3 m/s, 1.5-3.5 m/s, 2-4 m/s, 2.5-4.5 m/s, 1.5-4 m/s, 2-5 m/s or the like, which may be Further, the UV conversion efficiency is higher, or the environment is more adaptable.
- the ultraviolet sterilization and disinfection apparatus in the embodiment of the present invention further includes an adjustment module that adjusts the power of the low-pressure ultraviolet lamp and adjusts the ultraviolet dose of the airflow.
- Select tube current density: 0.450 A/cm 2 power can be adjusted to 62%;
- select tube current density: 0.500 A/cm 2 power can be adjusted to 56%;
- select tube current density: 0.550A/cm 2 Adjustable to 51%;
- select tube current density: 0.600 A/cm 2 power can be adjusted to 46%;
- select tube current density: 0.650A/cm 2 power can be adjusted to 43%;
- select tube current density: 0.700 A/cm 2 power can be adjusted to 40%; tube current density: 0.750 A/cm 2 , power can be adjusted to 37%.
- the tube current density can be selected separately: 0.400-0.450A/cm 2 , 0.450-0.500 A/cm 2 , 0.500-0.550A/cm2 , 0.550-0.600 A/cm 2 , 0.600-0.650 A/cm 2 or 0.650-0.700 A/cm 2 , 0.650-0.750 A/cm 2 .
- Similar adjustment modules can be set for power adjustment for other inner diameters.
- the inner diameter is ⁇ 26-30 ⁇
- the tube current density is selected from 0.300 to 0.850 A/cm 2
- the wind speed is l-5 m/s
- the tube current density 0.330-0.800 A/cm 2 .
- the tube current density can be selected separately: 0.450-0.500 A/cm 2 , 0.500-0.550 A/cm 2 , 0.550-0.600 A/cm 2 , 0.600- 0.650 A/cm 2 , 0.650-0.700 A/cm 2 , 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 .
- the tube current density can be selected separately: 0.450-0.500 A/cm 2 , 0.500-0.550 A/cm2, 0.550-0.600 A/cm 2 , 0.600-0.650 A/cm 2 , 0.650-0.700 A/cm 2 , 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800-0.850 A/cm 2 , 0.850-0.900 A/cm2, 0.900-0.950 A/cm 2 , 0.950- 1.000 A/cm 2 , 1.000-1.050 A/cm 2 .
- Inner diameter D 15-20mm, tube current density: 0.340- 1.350 A/cm 2 , wind speed l-5m/s, UV conversion efficiency ⁇ > 30%. UV to ensure ambient temperature changes from 10-35 °C Conversion efficiency, select tube current density: 0.400-1.300 A/cm 2.
- the tube current density can be selected separately: 0.450-0.500 A/cm 2 , 0.500- 0.550 A / cm 2, 0.550-0.600 A / cm 2, 0.600-0.650A / cm 2, 0.650-0.700 A / cm 2, 0.700-0.750A / cm2, 0.750-0.800A / cm 2, 0.800-0.850A / cm 2, 0.850-0.900 A / cm 2 , 0.900-0.950A / cm2, 0.950- 1.000A / cm 2, 1.000-1.050A / cm 2, 1.050-1.000A / cm 2, 0.950-1.100 A / cm2, 1.100 -1.150 A/cm 2 , 1.150-1.200 A/cm 2 , 1.200-1.250 A/cm 2 , 1.250-1.300 A/cm 2 .
- the tube current density can be selected separately: 0.450-0.500A/cm 2 , 0.500- 0.550 A/cm 2 , 0.550-0.600 A/cm 2 , 0.600-0.650 A/cm 2 , 0.650-0.700 A/cm 2 , 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800-0.850 A/cm 2 , 0.850-0.900 A/cm2, 0.900-0.950 A/cm 2 .
- the tube current density can be selected separately: 0.400-0.450 A/cm 2 , 0.450-0.500 A/cm 2 , 0.500-0.550 A/cm 2 , 0.550-0.600 A/cm, 0.600-0.650 A/cm 2 , 0.650-0.700 A/cm2, 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800-0.850 A/cm 2 , 0.850-0.900 A/cm 2 , 0.900-0.950 A/cm 2 .
- the tube current density can be selected separately from 0.400-0.450 A/cm2, 0.450-0.500 A/ Cm 2 , 0.500-0.550 A/cm 2 , 0.550-0.600 A/cm 2 , 0.600-0.650 A/cm 2 , 0.650-0.700 A/cm 2 , 0.700-0.750 A/cm 2 , 0.750-0.800 A/cm 2 , 0.800 -0.850 A/cm 2 .
- Tube current density can be selected separately: 0.400-0.450 A/cm2, 0.450-0.500 A/ Cm2, 0.500-0.550 A/cm2, 0.550-0.600 A/cm 2 , 0.600-0.650 A/cm 2 , 0.650-0.700 A/cm 2 , 0.700-0.750 A/cm 2 .
- Inner diameter D3-5mm, selected tube current density: 0.280-0.900 A/cm 2 , wind speed l-5m/s, UV conversion efficiency ⁇ > 25 %.
- the tube current density can be selected separately from 0.400-0.450 A/cm2, 0.450-0.500 A/cm.
- the embodiment of the present invention proposes an ultraviolet sterilization and disinfection device, which has high ultraviolet conversion efficiency when the temperature, wind speed environment changes and power is adjusted.
- the ultraviolet sterilization device is provided with one or more low-pressure ultraviolet lamps, and the preferred parameters of the low-pressure ultraviolet lamp are: an inner diameter of ⁇ 30-36 ⁇ , a tube current density of 0.400-0.750 A/cm2, or an inner diameter D 26-30mm, tube current density: 0.450-0.800 A/cm2; or, inner diameter is ⁇ 20-26 ⁇ , tube current density: 0.450-1.050 A/cm 2 ; or, inner diameter is (D 15-20mm, tube current density: 0.450 -1.350 A/cm 2 ; or , the inner diameter is ⁇ 12-15 mm, the tube current density is 0.450-0.950 A/cm 2 ; or the inner diameter is ⁇ 10-12 ⁇ , the tube current density is 0.400-0.950 A/cm 2 ; or , inner diameter is ⁇ 8-10 ⁇ , tube current density: 0.400-0.
- the above preferred range is to take into account the UV conversion efficiency under various conditions such as the volume and temperature of the sterilization and sterilization chamber, the change of the wind speed environment and the adjustment of the power.
- the tube current density is selected too small: 1.
- the volume of the sterilization and disinfection chamber is large, 2.
- Power The adjustment range is small.
- the UV conversion efficiency is low.
- the mercury vapor pressure is controlled by an alloy containing antimony indium tin mercury or an alloy containing antimony, tin, lead, and mercury.
- the above ambient temperature is more adaptable, and may be 0-35 ° C, 0-45 ° C, 5-35 ° C, 5 -45 °C, 10-45 °C, 10-55 °C, 15-55 °C, 15-60 °C, 15-65 °C, 15-70 °C, 15-75 °C, at these temperatures within the range, the UV output of the lamp changes by less than 10% and the UV dose of the gas stream changes by less than 10%.
- the material for controlling the vapor pressure of mercury in the low-pressure ultraviolet lamp is liquid mercury.
- the material for controlling the mercury vapor pressure of the low-pressure ultraviolet lamp is an alloy containing antimony indium tin-mercury or an alloy containing antimony, lead, and tin-mercury.
- the liquid mercury is built in the discharge chamber of the low-pressure ultraviolet lamp.
- the bismuth-indium-tin-mercury-containing alloy or the bismuth-lead-tin-mercury-containing alloy is built in the exhaust pipe of the low-pressure ultraviolet lamp or at the connection of the low-pressure ultraviolet lamp through which the fluid does not pass.
- the ultraviolet sterilization and disinfection apparatus in the embodiment of the present invention may further comprise an adjustment module for adjusting the ultraviolet dose of the airflow by adjusting the power of the low-pressure ultraviolet lamp.
- the low-pressure ultraviolet lamp is specifically set as follows:
- the inner diameter ⁇ 30-36 ⁇ , the single lamp discharge arc length can be one of the following parameters: ⁇ 80cm, >90cm>100cm>110cm, >120cm>130cm, >140cm>150cm>160cm>170cm,
- Inner diameter (D26-30mm, single lamp discharge arc length can be one of the following parameters: > 80cm, >90cm > 100cm > 110cm, > 120cm > 130cm > 140cm > 150cm > 160cm > 170cm,
- Inner diameter (D20-26mm, single lamp discharge arc length can be one of the following parameters: > 80cm, >90cm > 100cm > 110cm, > 120cm > 130cm > 140cm > 150cm > 160cm > 170cm,
- Inner diameter (D 15-20mm, single lamp discharge arc length can be one of the following parameters: ⁇ 60cm, ⁇ 70cm, ⁇ 80cm, ⁇ 90cm, >100cm, ⁇ 110cm, >120cm, ⁇ 130cm, >140cm , ⁇ 150cm,
- Inner diameter (D 12-15mm, single lamp discharge arc length can be one of the following parameters: ⁇ 60cm, ⁇ 70cm, ⁇ 80cm, ⁇ 90cm, >100cm, ⁇ 110cm, >120cm, ⁇ 130cm, >140cm , ⁇ 150cm,
- Inner diameter (D 8-10mm, single lamp discharge arc length can be one of the following parameters: > 40cm, > 50cm, > 60cm, > 70cm, > 80cm, > 90cm, > 100cm, > 110cm, > 120cm , > 130cm,
- the inner diameter (D 5-8mm, single lamp discharge arc length can be one of the following parameters: 25>cm, ⁇ 30cm, ⁇ 35cm, ⁇ 40cm, ⁇ 50cm, ⁇ 60cm, ⁇ 70cm, ⁇ 80cm, ⁇ 90cm, >100cm, >110cm, >120cm;
- the inner diameter ⁇ 3-5 ⁇ the single lamp discharge arc length can be one of the following parameters: 15>cm, ⁇ 18cm, ⁇ 20cm, ⁇ 25cm, ⁇ 30cm, ⁇ 35cm, ⁇ 40cm, ⁇ 50cm, ⁇ 60cm , ⁇ 70cm, ⁇ 80cm.
- the embodiment of the invention further provides a method for setting an ultraviolet sterilization and disinfection device, comprising: a tube diameter, a tube current, a discharge arc length, a material for controlling a mercury vapor pressure, and a filling gas for various low-pressure ultraviolet lamps; Optimization and design, including environmental changes such as temperature and wind speed changes, and parameter optimization and design during power regulation. Also includes:
- the one or more low-pressure ultraviolet lamps are disposed in the ultraviolet sterilization and disinfection device, comprising: preset an initial position of the low-pressure ultraviolet lamp according to a cavity structure of the ultraviolet sterilization and disinfection device;
- the size, structure, and tube current density of each of the positionally adjusted low pressure ultraviolet lamps are determined in accordance with predetermined ultraviolet dose requirements.
- the flow field of the airflow is analyzed by ANSYS or similar fluid analysis software to make the flow field distribution uniform.
- an average illuminance value of each node in the predetermined discrete grid may be obtained according to the following formula: E _ P(2a + sm 2a)
- E is the ultraviolet intensity
- P is the ultraviolet power
- ⁇ is the half angle between the UV intensity node and the UV lamp arc length to be calculated
- L is the discharge arc length of the UV lamp
- D is the UV lamp distance to be calculated. The normal distance of the node.
- the sterilization and disinfection efficiency of the low-pressure ultraviolet lamp can be greatly improved; on the other hand, by shaping the shape of the ultraviolet irradiation region, then The method of discrete and re-integration obtains the specific node position of the ultraviolet sterilization lamp and the ultraviolet sterilization intensity corresponding to each node, and comprehensively considers the influence of each lamp on the calculation point, so that the ultraviolet sterilization lamp of different positions The intensity setting is more reasonable, and the illumination of the ultraviolet sterilization lamp in the whole device is hooked, thereby increasing the efficiency of ultraviolet sterilization.
- FIG. 1 it is a specific embodiment of a method for setting an ultraviolet sterilization device in an embodiment of the present invention, which is mainly used for setting a position of an ultraviolet sterilization lamp in an ultraviolet sterilization device, the ultraviolet
- the sterilization lamp includes a discharge device, a discharge vessel, and an amalgam filled in the discharge vessel.
- the method comprises the following steps:
- the average illuminance value of each node in the predetermined discrete grid may be obtained according to the following formula:
- E is the ultraviolet intensity
- P is the ultraviolet power
- ⁇ is the half angle between the UV intensity node and the UV lamp arc length to be calculated
- L is the discharge arc length of the UV lamp
- D is the UV lamp distance to be calculated. The normal distance of the node.
- the method further includes: calculating an ultraviolet dose uniformity of the ultraviolet irradiation region, and adjusting each of the discrete grids preset in step 103 according to the ultraviolet dose uniformity and the expected ultraviolet dose uniformity The position of the node, the average illuminance value, and the time at which the air flows through the ultraviolet irradiation region until the calculated ultraviolet dose uniformity satisfies the expected ultraviolet dose uniformity.
- FIG. 2 it is another specific embodiment of the method for setting the ultraviolet sterilization and disinfection apparatus in the embodiment of the present invention.
- a discrete mesh into the cross section of the ultraviolet irradiation region. That is, after the desired ultraviolet illuminance is known, one or more low pressure high intensity ultraviolet lamps corresponding to the ultraviolet dose are selected and placed at a preliminary uniform interval in the region. In the subsequent steps, the plurality of lamp distributions and regions are differentiated and discretely calculated to obtain an optimal arrangement. As shown in Fig. 4, a schematic diagram of a discrete mesh is divided into three differently shaped sections as shown in FIG.
- V the lamp voltage
- I the discharge current
- (1 tube current density A / cm2
- the lamp voltage V VAK + e Lc
- VAK is the electrode drop, generally 17V Left and right
- e is the axial electric field strength of the positive column area
- Lc discharges the length of the positive column area.
- the value of the lamp voltage is generally 40-70% of the supply voltage according to the difference of the supply voltage, and ⁇ ⁇ is the distortion factor of the lamp.
- ⁇ is the conversion efficiency of the ultraviolet lamp, that is, the electric power supplied to the ultraviolet lamp is converted into ultraviolet The ratio of flux (power).
- ⁇ is the half angle between the UV intensity node and the UV lamp arc length to be calculated
- L is the discharge arc length of the lamp
- D is the normal distance of the UV lamp from the UV intensity node to be calculated.
- FIG. 5 it is a schematic diagram of the meanings of ⁇ , L and D.
- the average illuminance value of two adjacent points in the vertical direction is taken as the illuminance value of the discrete small segment.
- each node takes into account the influence of each tube on it.
- the average illuminance value of the discrete small segment is obtained by multiplying the upper step by the time required for the fluid to flow through the small segment, that is, the illuminance of the entire flow line flowing through the ultraviolet irradiation region is summed; the other flow lines are calculated by the same method. Illumination, calculate the illuminance of different streamlines. What is obtained is the dose of ultraviolet light that the bacteria are exposed to in the UV-irradiated area.
- the low-voltage high-intensity ultraviolet lamp corresponding to the required ultraviolet dose and adjust the position of the node arranged in step 203 to satisfy the above value range. Further, the ultraviolet dose uniformity in the ultraviolet irradiation region can be calculated, and the node position of the 203 array is adjusted to meet the expected value of the ultraviolet dose uniformity.
- Dose uniformity D0SE ⁇
- the lowest dose appears at the wall surface, the lowest dose value is: 6414 uws/cm2; the highest dose appears in the middle about 5 mm near the sides, the highest dose value is: 8598 uws/cm2; then the uniformity distribution value is: 75%.
- the shape of the ultraviolet irradiation region is compressed, and then the specific node position of the ultraviolet sterilization lamp and the ultraviolet sterilization intensity corresponding to each node are obtained by discrete and re-integration. Taking into account the influence of each lamp on the calculation point, the intensity setting of the ultraviolet sterilization lamp at different positions is more reasonable, the illumination of the ultraviolet sterilization lamp in the whole device is uniform, and the ultraviolet sterilization efficiency is increased.
- the ultraviolet sterilization and disinfection device comprises an ultraviolet sterilization lamp, a fan, an air inlet, a sterilization and disinfection chamber, an air outlet, and a sterilization and disinfection module in the sterilization and disinfection chamber, which comprises at least one ultraviolet module, and the ultraviolet module adopts the above optimization.
- the low-pressure UV lamp is designed with UV illumination and flow field.
- the sterilization module includes a photocatalyst module, an electrostatic module, a filtration module, and an ozone module in addition to the ultraviolet module.
- the ultraviolet sterilization and disinfection device further comprises a light-shielding baffle, wherein the light-shielding baffle is a grid bar structure, and each of the grids comprises a bent light-shielding flow guiding portion and a straight plate diversion flow of at least one straight line along the air flow direction. section.
- the light shielding baffle is a metal plate, and different voltages are applied on the light shielding baffle to make the light shielding baffle have an electrostatic adsorption function at the same time.
- the sterilization and disinfection module has at least one detachable embedded structure, and the ultraviolet module, the photocatalyst module, the electrostatic module, the filter module, and the ozone module may all be detachable embedded structures. It can be loaded and unloaded separately, or multiple sterilization and disinfection modules can be connected by connectors, which can be integrally loaded and unloaded.
- the sterilizing and disinfecting module of the detachable embedded structure is directly embedded in the pre-made card slot of the ultraviolet sterilizing device;
- the sterilizing and disinfecting module of the detachable embedded structure is connected to the ultraviolet sterilizing device by a spring snap, a snap fastener or the like;
- the sterilizing and sterilizing module of the detachable embedded structure is connected to the ultraviolet sterilizing device by screw or shell.
- FIG. 6 is a schematic structural view of an ultraviolet sterilization and disinfection device: the air sterilization and disinfection device includes a plurality of ultraviolet sterilization and disinfection modules 30 and a frame 32 for fixing the ultraviolet sterilization and disinfection module, and each of the ultraviolet sterilization and disinfection modules includes One or more UV sterilization lamps, the frame including a removable insert structure for receiving and securing one or more sterilization and disinfection modules.
- the sterilization and disinfection module in the sterilization and disinfection device is a replaceable module, and when the sterilization and disinfection lamp in the sterilization and disinfection device fails, the battery can be replaced or repaired independently; on the other hand, according to actual needs, When the UV illuminance needs to be adjusted, it can be realized by increasing or decreasing the UV sterilization module. When the sterilization and disinfection module is reduced, the frame can be supplemented at this position. The frame has no UV sterilization lamp, and only serves to maintain the device structure and The purpose of preventing ultraviolet light and air leakage; it is also possible to supplement the photocatalyst module here to enhance the function of removing organic matter.
- the ultraviolet air sterilization and disinfection apparatus shown in FIG. 6 further includes a photocatalyst module 8 disposed in the casing for removing gas odor and other organic pollutants, and also killing the bacterial virus.
- the photocatalyst module of the embodiment includes a plate or a mesh material disposed at two ends of the sterilization cavity of the sterilization and disinfecting device, and the photocatalyst material is one or more of nano titanium oxide, nano zinc oxide, and nano silver.
- the sterilization and disinfection device comprises a plurality of sterilization and disinfection modules
- the photocatalyst module A photocatalyst sheet or mesh material placed at each end of each of the sterilization and disinfection modules is included.
- the ultraviolet air sterilization and disinfection device as shown in FIG. 6 further includes an electrostatic device 7 disposed in the casing for removing solid particles and also adsorbing and removing the bacterial virus.
- the electrostatic devices of this embodiment are respectively disposed at the front end of the sterilization and disinfection module, and may be disposed at the rear end of the sterilization and disinfection module as needed.
- Cuboid sterilization chamber 30cm long, 20cm wide and 40cm high.
- Three M-type UV lamps are used. The center distance of the three rows of lamps is 15cm, the outer diameter of the UV lamp is 15mm, the power is 120W, and the airflow velocity in the sterilization chamber is 1.2m/ s, the minimum illuminance is: 27mW/cm 2 , the minimum ultraviolet dose is about 9.0mJ/cm 2 , and the flow rate per second is 0.072m3.
- the UV dose reaches the reference dose of 5 mJ/cm 2 (mWs/cm 2 ).
- Cylindrical sterilization chamber 40cm in diameter and 60cm in height, using four annular UV lamps, the center of the four rows of lamps is 15cm, the outer diameter of the UV lamp is 19mm, the power is 250W, and the flow velocity in the sterilization chamber is 2.0m/s.
- the minimum illuminance is: 25mW/cm 2
- the minimum ultraviolet dose is about 7.5mJ/cm 2
- the flow rate per second is 0.25 m3.
- the UV dose reaches the reference dose of 5mJ/cm 2 (mWs/cm 2 ).
- the ratio of the volume of the UV sterilization chamber to the flow rate per second is 0.20.
- the UV lamp power required for the reference flow rate of 10m3/h is: 14.8W.
- Central air-conditioning cuboid sterilization chamber 60cm high, 60cm wide, 190cm long, 9 straight-tube type UV lamps, 8 lamps are arranged in a square shape, the distance from the end face is 10cm, and another lamp is placed outside the UV lamp.
- the diameter is 38mm
- the power is 800W
- the total power of the lamp is 7200W
- the flow rate is 3.0m/s
- the inner wall of the sterilization and disinfection chamber is polished aluminum layer
- the minimum illumination is 20mW/cm 2
- the minimum ultraviolet dose is about 12.7mJ/cm2.
- the second flow rate is: 1.08m3, the ultraviolet dose reaches the reference dose of 5mJ/cm 2 (mWs/cm 2 ), and the ratio of the volume of the UV sterilization chamber to the flow rate per second is 0.249, and the UV light required for the reference flow rate is 10m3/h.
- the power is: 14.6W.
- Cylindrical sterilization chamber 60cm in diameter and 70cm in height, using four annular UV lamps.
- the center of the four rows of lamps is 18cm apart, the outer diameter of the UV lamp is 38mm, the center of the ring is 40cm, and the power is 700W.
- the electrodeless UV lamp is embedded in a duct structure with a flow rate of 2.0m/s.
- the inner wall of the sterilization chamber is a polished aluminum layer with a minimum illumination of 22mW/cm 2 , a minimum UV dose of approximately 7.7mJ/cm 2 , a flow rate of 0.565 m3 per second, and a UV dose of 5 mJ/cm 2 (mWs). /cm 2 ) , the ratio of the volume of the UV sterilization chamber to the flow rate per second is 0.23, and the reference flow rate is 10m3/h.
- the required UV lamp power is 15.8W.
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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)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Physical Water Treatments (AREA)
- Discharge Lamp (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Electrostatic Separation (AREA)
Abstract
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EP14847129.5A EP3031476B1 (en) | 2013-09-27 | 2014-02-13 | Ultraviolet sterilization and disinfection apparatus |
JP2016541769A JP6442511B2 (ja) | 2013-09-27 | 2014-02-13 | 紫外線殺菌消毒装置及びその配置方法 |
US14/907,832 US10322204B2 (en) | 2013-09-27 | 2014-02-13 | Ultraviolet sterilization and disinfection device and configuration method thereof |
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