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GB 28235-2020: Hygienic requirements for ultraviolet appliance of disinfection
Status: Valid GB 28235: Evolution and historical versions
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Hygienic requirements for ultraviolet appliance of disinfection
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Safety and sanitary standard for ultraviolet appliance for air disinfection
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Basic data | Standard ID | GB 28235-2020 (GB28235-2020) | | Description (Translated English) | Hygienic requirements for ultraviolet appliance of disinfection | | Sector / Industry | National Standard | | Classification of Chinese Standard | C50 | | Classification of International Standard | 11.080 | | Word Count Estimation | 34,390 | | Date of Issue | 2020-04-09 | | Date of Implementation | 2020-11-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB 28235-2020: Hygienic requirements for ultraviolet appliance of disinfection---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Hygienic requirements for ultraviolet appliance of disinfection
ICS 11.080
C50
National Standards of People's Republic of China
Replace GB 28235-2011
Hygienic requirements for ultraviolet sterilizers
Released on 2020-04-09
2020-11-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Contents
Foreword I
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Raw material requirements 3
5 Technical requirements 5
6 Applications 8
7 How to use 8
8 Inspection method 9
9 Logo and Packaging 11
10 Transportation and Storage 11
11 Nameplate and instruction manual 11
Appendix A (Normative Appendix) Measuring Method of Ultraviolet Intensity 13
Appendix B (Normative Appendix) Life Test Method 15
Appendix C (Normative Appendix) Air Disinfection Simulated Field Test 16
Appendix D (Normative Appendix) Air Disinfection Field Test 19
Appendix E (Normative) Microbial killing test in water disinfection laboratory 21
Appendix F (Normative Appendix) Water Disinfection Simulated Field Test and Field Test 24
Appendix G (Normative Appendix) Microbial Killing Test for Object Surface Disinfection Laboratory 26
Appendix H (Normative Appendix) Simulated Field Test and Field Test of Object Surface Disinfection 28
Foreword
All technical contents of this standard are mandatory.
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB 28235-2011 "Safety and Hygiene Standards for Ultraviolet Air Disinfectors". Compared with GB 28235-2011, the main
The technical changes are as follows.
--- Modified the scope;
--- Modified the definition and name of "ultraviolet sterilization lamp" and added "ultraviolet disinfection", "ultraviolet disinfection device" and "upper level ultraviolet radiation"
Definitions of "line air sterilizer", "ultraviolet effective dose", "ultraviolet water sterilizer", "ultraviolet surface sterilizer";
--- Deleted the contents of "specifications and classifications" and "names and models" that do not belong to product safety and hygiene requirements;
--- Modified the requirements for raw materials, made it into a separate chapter, and changed the requirements for raw materials closely related to product effectiveness and safety indicators to strong
Mandatory clause;
--- Modified the technical requirements and deleted the technical requirements for electrical safety;
--- Modified the content of the application scope;
--- Modified the content of "Precautions" and merged it with "Label and User Manual" into the chapter of "Nameplate and User Manual";
--- Added the relevant requirements of ultraviolet water disinfector and ultraviolet surface disinfector;
--- Added Appendix A "Measurement Method of Ultraviolet Intensity", Appendix B "Life Test Method", Appendix C "Air Disinfection Simulation Site"
Test ", Appendix D" Air Disinfection Field Test ", Appendix E" Water Disinfection Laboratory Microbial Kill Test ", Appendix F" Water Disinfection
Simulated field test and field test ", Appendix G" Object surface disinfection laboratory microorganism killing test "and Appendix H" Object table
"Surface disinfection simulation field test and field test".
This standard is proposed and managed by the National Health Commission of the People's Republic of China.
This standard was drafted by. Jiangsu Provincial Health Supervision Office, Wuhan Center for Disease Control and Prevention, Shandong Provincial Health and Health Commission Law Enforcement Supervision
Bureau, China Center for Disease Control and Prevention, Environmental and Health Related Product Safety Institute.
The main drafters of this standard. Gu Jian, Liang Jiansheng, Cheng Yeqi, Yuan Qingchun, Shi Yuchang, Qiu Xingfen, Li Yan, Wang Jian, Zhou Yaoqing, He Zhiming,
Qiao Weihan, Song Hengzhi, Huang Yehui.
The previous versions of the standard replaced by this standard are as follows.
--- GB 28235-2011.
Hygienic requirements for ultraviolet sterilizers
1 Scope
This standard specifies the raw material requirements, technical requirements, application scope, use methods, inspection methods, signs and packaging of ultraviolet sterilizers,
Transportation and storage, nameplate and instruction manual.
This standard applies to ultraviolet sterilizers with C-band ultraviolet (wavelength range of.200nm ~ 280nm) as the sterilization factor.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For the cited documents without date, the latest version (including all amendments) applies to this document.
GB/T 191 Graphic mark for packaging, storage and transportation
GB 5749 Sanitary Standards for Drinking Water
GB/T 5750.2 Standard Test Method for Drinking Water Collection and Storage of Water Samples
GB/T 5750.12 Standard test method for drinking water Microbiological indicators
GB/T 10682 Double-end fluorescent lamp performance requirements
GB/T 14294-2008 Combined air conditioning unit
GB/T 15144 Performance requirements for AC electronic ballasts for tubular fluorescent lamps
GB 15982 Hygienic standard for hospital disinfection
GB/T 17219 Safety evaluation standard for drinking water transmission and distribution equipment and protective materials
GB/T 17262 Single-end fluorescent lamp performance requirements
GB 17625.1 electromagnetic compatibility limit harmonic current emission limit (equipment input current ≤16A per phase)
GB/T 17743 Limits and measurement methods for radio disturbance characteristics of electrical lighting and similar equipment
GB 17988 Safety and hygiene requirements for tableware disinfection cabinets
GB/T 18202 Hygienic standard for ozone in indoor air
GB/T 18204.9 Microbiological examination method for swimming pool water Determination of total bacteria
GB/T 18204.10 Microbiological examination method for swimming pool water Determination of coliform bacteria
GB 18466 Discharge Standard for Water Pollutants in Medical Institutions
GB/T 19258 UV germicidal lamp
GB 19510.1 Lamp control device Part 1. General requirements and safety requirements
GB/T 19837 Urban water supply and drainage ultraviolet disinfection equipment
GB 37488 Hygienic indicators and limit requirements for public places
GBZ /T 189.8 Measurement of physical factors in the workplace Part 8. Noise
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Ultraviolet lamp
A special electric light source that uses ultraviolet light directly for disinfection purposes.
3.2
Ultraviolet disinfection
After pathogenic microorganisms absorb ultraviolet energy with a wavelength between.200nm and 280nm, their genetic
The cells no longer divide and multiply, and achieve the purpose of disinfection to kill pathogenic microorganisms.
3.3
Ultraviolet disinfection ultraviolet disinfectionofdisinfection
Using ultraviolet lamps as the light source and using the ultraviolet radiation radiated by the lamp as the sterilization factor to disinfect the pathogenic microorganisms on the transmission medium
instrument.
3.4
Ultraviolet air disinfector ultravioletapplianceforairdisinfection
An ultraviolet sterilizer that uses ultraviolet lamps, filters, fans and ballasts to achieve the purpose of air disinfection.
Note. The filter and fan do not have the role of sterilization factor.
3.5
Upper flat shot ultraviolet air sterilizer upperflatshotultravioletapplianceforairdisinfection
Installed on the top or top of the indoor wall, ≥2.1m above the ground, ultraviolet rays are emitted parallel to the ground, ultraviolet rays for the purpose of air disinfection
Gas sterilizer.
3.6
Ultraviolet water disinfection ultravioletapplianceforwaterdisinfection
It is composed of ultraviolet light, quartz tube, ballast and other components sealed in the container to achieve the purpose of water disinfection.
Poison.
3.7
Ultraviolet surface disinfection ultravioletapplianceforsurfacedisinfection
A disinfection instrument that uses ultraviolet light, power adapter and other components to achieve the purpose of disinfecting the surface of objects.
3.8
Ultraviolet intensity
Ultraviolet energy received per unit area per unit time perpendicular to the direction of UV propagation.
Note. Common units are microwatts per square centimeter (μW/cm2) or watts per square meter (W/m2).
3.9
Ultraviolet effective dose
Within a certain operating time, the ultraviolet disinfectant can achieve the dose of microorganism killing ultraviolet.
Note. Also known as the biological verification dose of ultraviolet sterilizer.
3.10
Disinfection cycle
The ultraviolet sterilizer implements a sterilization operation process to meet the whole process of sterilization requirements.
3.11
Disinfection time
The time for the ultraviolet sterilizer to be disinfected under the working conditions specified in this standard.
3.12
(Ultraviolet lamp) effective life time
The cumulative ignition time when the UV intensity value of the new UV lamp is reduced to 70% specified in this standard.
3.13
Cyclic wind volume
The volume of air circulating through the ultraviolet air sterilizer per hour under standard air conditions.
Note. The unit is cubic meters per hour (m3/h).
4 Raw material requirements
4.1 Ultraviolet air sterilizer
4.1.1 UV lamp
4.1.1.1 Raw materials
The ultraviolet lamp should use quartz glass or raw materials with ultraviolet transmittance not lower than quartz glass.
4.1.1.2 UV intensity
The initial UV intensity of double-ended and single-ended UV lamps should be no less than 93% of the values specified in Table 1 and Table 2, respectively, and the intensity of other UV lamps
Degree should meet the requirements of relevant standards.
Table 1 Initial UV intensity specifications for double-ended UV lamps
Nominal power/W 4 6 8 13 15 18 30 36 60 75 100 150 250 320 400 550 750 1000
UV intensity/(μW/cm2) 9 15 22 35 50 62 100 135 190 250 305 400 650 720 9001 15013001730
Table 2 The specified value of initial UV intensity of single-ended UV lamp
Nominal power/W 5 7 9 11 18 24 36 55 75 95 150
UV intensity/(μW/cm2) 9 16 22 33 51 65 110 150 170 304 400
4.1.1.3 Starting performance
4.1.1.3.1 should have good starting performance.
4.1.1.3.2 Electronic ballasts should be used, and should comply with relevant standards such as GB/T 15144 or GB 19510.1.
4.1.1.4 Other technical performance
Should meet the requirements of GB/T 19258 and other relevant standards.
4.1.2 Requirements for other raw materials
4.1.2.1 The filter media should have the function of blocking ultraviolet leakage. The filter net using fiber filter material should not have dust falling off.
4.1.2.2 The parts and casing of the ultraviolet air sterilizer should be made of flame retardant, ultraviolet radiation resistant and corrosion resistant materials
Except for sheet metal parts), the wind speed regulator should not be used.
4.1.2.3 The universal wheel of the mobile ultraviolet air sterilizer should adopt a silent universal wheel.
4.1.2.4 The upper level ultraviolet radiation air sterilizer should be equipped with human body induction protection device.
4.2 UV water sterilizer
4.2.1 UV lamp
4.2.1.1 Raw materials
Should meet the requirements of 4.1.1.1.
4.2.1.2 UV intensity
Should meet the requirements of 4.1.1.2.
4.2.1.3 Starting performance
Should meet the requirements of 4.1.1.3.
4.2.1.4 Other technical performance
Should meet the requirements of GB/T 19258 and other relevant standards.
4.2.2 Other raw material requirements
4.2.2.1 Other materials in contact with water of the ultraviolet water sterilizer should meet the requirements of GB/T 17219, in which the quartz tube per mm of quartz
The thickness of ultraviolet transmittance should not be less than 90%.
4.2.2.2 The ultraviolet intensity meter (if any) shall have a certificate of conformity for verification.
4.3 Ultraviolet sterilizer
4.3.1 UV lamp
4.3.1.1 Raw materials
Should meet the requirements of 4.1.1.1.
4.3.1.2 UV intensity
Should meet the requirements of 4.1.1.2.
4.3.1.3 Starting performance
Should meet the requirements of 4.1.1.3.
4.3.1.4 Other technical performance
Should meet the requirements of GB/T 19258 and other relevant standards.
4.3.2 Requirements for other raw materials
4.3.2.1 The ultraviolet surface disinfector should be in good sealing performance, and the door with brake lock switch should be installed.
4.3.2.2 The body of the ultraviolet sterilizer should be heat-resistant, smooth and smooth.
4.3.2.3 The four corners of the body of the ultraviolet sterilizer should be arc-shaped, and materials with better reflective properties should be used if possible.
5 Technical requirements
5.1 Ultraviolet air sterilizer
5.1.1 Basic working conditions
The UV air sterilizer works normally in the following environments.
a) Use power supply voltage. 220V ± 22V, power supply frequency. 50Hz ± 1Hz;
b) Ambient temperature. 5 ℃ ~ 40 ℃;
c) Relative humidity. ≤80%.
5.1.2 Main components UV lamp
5.1.2.1 UV intensity
Should meet the requirements of 4.1.1.2.
5.1.2.2 Fluctuation range of UV intensity
After starting for 5 minutes, the change of UV intensity should reach a stable level under normal working conditions, and the fluctuation range should not exceed 5% of the average.
5.1.2.3 Effective life
The effective life of the main components UV lamp should be ≥1000h.
5.1.3 Working noise
The whole machine should be stable and reliable, without vibration, and the noise limit should be ≤55dB (A weighting).
5.1.4 Circulation air volume
The initial circulating air volume of the whole machine should not be less than 8 times the applicable volume.
5.1.5 Disinfection effect
5.1.5.1 Simulated field test
Under the condition that the laboratory temperature is 20 ℃ ~ 25 ℃, the relative humidity is 50% ~ 70%, the start-up function is up to the product instruction manual
The time (the maximum disinfection time should not exceed 2h), the killing rate of air-contaminated Staphylococcus albicans (8032) should be ≥99.9%.
5.1.5.2 Field test
Under the natural conditions on site, in accordance with the conditions stipulated in the product instruction manual, the power-on effect will last for the time specified in the product instruction manual (the longest
Disinfection time should not exceed 2h), the rate of natural bacteria in the air should be ≥90.0%. For disinfection of ambient air in medical institutions, after disinfection
The total number of colonies in the air should also meet the hygienic standard value of GB 15982; for disinfection in other places, the total number of colonies in the air after disinfection should also be
Meet the requirements of relevant standards.
5.1.6 Leakage
5.1.6.1 UV leakage
The ultraviolet radiation leakage of the upper level flat-air ultraviolet air sterilizer should be ≤5μW/cm2 in the safe area below 2.1m. Other ultraviolet rays
The air sterilizer is 30cm away from the periphery of the sterilizer, and the ultraviolet leakage should be ≤5μW/cm2.
5.1.6.2 Ozone leakage
When the ultraviolet air sterilizer is working, the average allowable ozone concentration in indoor air environment is 0.1mg/m3 in 1h under the condition of people.
5.2 UV water sterilizer
5.2.1 Basic working conditions
The UV water sterilizer works normally in the following environment.
Use power supply voltage. 220V ± 22V, power supply frequency. 50Hz ± 1Hz; ambient temperature. 5 ℃ ~ 40 ℃.
5.2.2 Main components UV lamp
5.2.2.1 UV intensity
Should meet the requirements of 4.1.1.2.
5.2.2.2 Ultraviolet intensity fluctuation range
Should meet the requirements of 5.1.2.2.
5.2.2.3 Effective life
Should meet the requirements of 5.1.2.3.
5.2.3 Effective UV dose
Should comply with the provisions of GB/T 19837.
5.2.4 Disinfection effect
5.2.4.1 Laboratory microorganism killing test
Under the condition of laboratory temperature of 20 ℃ ~ 25 ℃, the minimum effective dose of disinfection and other parameters and procedures according to the product instruction manual
The disinfection process should be carried out in order to reduce E. coli (8099) to 0CFU/100mL.
5.2.4.2 Simulated field test
Under the natural conditions of the test site, the disinfection treatment is carried out according to the parameters and procedures such as the minimum effective dose of disinfection specified in the product instruction manual.
E. coli (8099) should be reduced to 0CFU/100mL.
5.2.4.3 Field test
Under the natural conditions on site, the disinfection treatment shall be carried out according to the parameters and procedures such as the minimum effective dose of disinfection specified in the product instruction manual.
For disinfection of sewage in medical institutions, the number of fecal coliforms in the water after disinfection should meet the standard value of GB 18466; used for disinfection of domestic drinking water
The microbial indicators in the water after disinfection should meet the standard value of GB 5749; for disinfection of swimming pool water, the microbial indicators in the water after disinfection should be
Comply with the standard value of GB 37488; for disinfection of reclaimed water, the microbial indicators in the water after disinfection should comply with the relevant standards of urban wastewater recycling
Quasi-standard value; for other water quality disinfection, the microbial index after disinfection should comply with the relevant standards.
5.3 Ultraviolet sterilizer
5.3.1 Basic working conditions
Should meet the requirements of 5.1.1.
5.3.2 Main components UV lamp
5.3.2.1 UV intensity
It shall meet the requirements of 4.3.1.2.
5.3.2.2 Ultraviolet intensity fluctuation range
Should meet the requirements of 5.1.2.2.
5.3.2.3 Effective life
Should meet the requirements of 5.1.2.3.
5.3.3 Working noise
Should meet the requirements of 5.1.3.
5.3.4 Disinfection effect
5.3.4.1 Laboratory microorganism killing test
In the laboratory temperature is 20 ℃ ~ 25 ℃, the power is turned on until the time specified in the product manual, and the logarithm of the index microorganisms is killed
The value should meet the requirements of Table 3.
Table 3 Killing effect on index microorganisms
5.3.4.2 Simulated field test or field test
Under the natural conditions on site, conduct simulated field tests or field tests in accordance with the conditions specified in the product instruction manual.
The time specified in the product manual. The logarithmic value of killing the index microorganism contaminated on the surface of the test object through the simulated field test
It should be ≥ 3.00; after field test, the logarithmic value of natural bacteria on the surface of the test object should be ≥ 1.00. For disinfecting the surface of objects in medical institutions,
The total number of bacterial colonies on the surface of the object after disinfection should also meet the hygienic standard value of GB 15982; for the surface disinfection of other objects, the surface of the object after disinfection
The total number of colonies on the surface should also comply with the relevant standards.
5.3.5 Leakage
5.3.5.1 UV leakage
At a distance of 30cm from the periphery of the sterilizer, the ultraviolet leakage should be ≤5μW/cm2.
5.3.5.2 Ozone leakage
Should meet the requirements of 5.1.6.2.
6 Scope of application
6.1 UV air sterilizer
Suitable for medical and health institutions, pathogenic microbiology laboratories, production workshops with hygienic requirements, public places, schools, nursery institutions and other fields
Therefore, indoor dynamic air disinfection under manned conditions can also be used under unmanned conditions.
6.2 UV water sterilizer
Suitable for disinfection of various water bodies.
6.3 Ultraviolet sterilizer
It is suitable for disinfecting the surface of medical equipment and supplies, tableware (drinking utensils) and other objects.
7 How to use
7.1 UV air sterilizer
7.1.1 According to the volume of the space to be disinfected and the applicable volume requirements in the product instruction manual, select the applicable ultraviolet air disinfection
Poison device model.
7.1.2 Install ultraviolet air sterilizer according to the requirements of the instruction manual.
7.1.3 When performing air disinfection, the doors and windows should be closed, the power supply should be turned on, the indicator light is on, and the switch or remote control should be pressed to set the disinfection time.
start working. After a sterilization cycle according to the set procedure, the sterilization process is completed. The operation mode of dynamic air sterilizer adopts automatic interruption
run.
7.2 UV water sterilizer
7.2.1 According to the water quality, quantity and temperature of the water to be disinfected, choose the UV water sterilizer model of corresponding specifications.
7.2.2 Install the ultraviolet water sterilizer according to the requirements of the instruction manual.
7.2.3 When performing water disinfection, the power should be turned on, the indicator light is on, press the switch or the remote control, the sterilizer starts to work, and the disinfection process is completed.
7.3 Ultraviolet sterilizer
7.3.1 According to the surface area of the object to be sterilized and the requirements of the product instruction manual, select the applicable ultraviolet object surface sterilizer
model.
7.3.2 When performing disinfection, the power should be turned on, the indicator light is on, press the switch or the remote control, set the disinfection time, according to the product manual
Make sure that the surface of the sterilized items are exposed to ultraviolet radiation. When using the ultraviolet disinfection box, the items to be disinfected should be placed in an appropriate amount.
Should be placed too full, over crowded, and close the door with a brake lock switch, the sterilizer begins to work. After a sterilization cycle according to the set procedure, complete
Into disinfection.
8 Inspection methods
8.1 Ultraviolet air sterilizer
8.1.1 Main components
8.1.1.1 UV intensity
Determine according to the method of Appendix A.
8.1.1.2 UV intensity fluctuation range
Set 5 time detection points, which should include 5 minutes of lighting and effective disinfection time.
range.
8.1.1.3 Effective life
Determine according to the method specified in Appendix B.
8.1.2 Working noise
According to the method specified in GBZ /T 189.8.
8.1.3 Circulation air volume
According to the method specified in B.2.1 of GB/T 14294-2008.
8.1.4 Disinfection effect
8.1.4.1 Simulated field test
Determine according to the method specified in Appendix C.
8.1.4.2 Field test
Determine according to the method specified in Appendix D.
8.1.5 Leakage
8.1.5.1 UV leakage
Turn on the ultraviolet sterilizer for 5 minutes. After stabilization, check the ultraviolet intensity with an ultraviolet intensity meter according to the distance specified in 5.1.6.1.
8.1.5.2 Ozone leakage
According to the method specified in GB/T 18202.
8.2 UV water sterilizer
8.2.1 Main components
8.2.1.1 UV intensity
Determine according to the method of Appendix A.
8.2.1.2 Ultraviolet intensity fluctuation range
Determine according to the method of 8.1.1.2.
8.2.1.3 Effective life
Determine according to the method specified in Appendix B.
8.2.2 Effective UV dose
According to the method specified in GB/T 19837.
8.2.3 Disinfection effect
8.2.3.1 Laboratory microorganism killing test
Determine according to the method specified in Appendix E.
8.2.3.2 Simulated field test or field test
Determine according to the method specified in Appendix F.
8.2.4 Leakage
8.2.4.1 UV leakage
Determine according to the method of 8.1.5.1.
8.2.4.2 Ozone leakage
According to the method specified in GB/T 18202.
8.3 Ultraviolet sterilizer
8.3.1 Main components
8.3.1.1 UV intensity
Determine according to the method of Appendix A.
8.3.1.2 UV intensity fluctuation range
Determine according to the method of 8.1.1.2.
8.3.1.3 Effective life
Determine according to the method specified in Appendix B.
8.3.2 Working noise
According to the method specified in GBZ /T 189.8.
8.3.3 Disinfection effect
8.3.3.1 Laboratory microorganism killing test
Determine according to the method specified in Appendix G.
8.3.3.2 Simulated field test or field test
Determine according to the method specified in Appendix H.
8.3.4 Leakage
8.3.4.1 UV leakage
Determine according to the method of 8.1.5.1.
8.3.4.2 Ozone leakage
According to the method specified in GB/T 18202.
9 Logos and packaging
9.1 The packaging label shall meet the requirements of the rel...
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