GB/T 14295: Evolution and historical versions
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Basic data | Standard ID | GB/T 14295-2019 (GB/T14295-2019) | | Description (Translated English) | Air filter | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | P48 | | Classification of International Standard | 91.140.30 | | Word Count Estimation | 26,243 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2020-05-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 14295-2019: Air filter---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.
Air filter
ICS 91.140.30
P48
National Standards of People's Republic of China
Replace GB/T 14295-2008
air filter
2019-06-04 released
2020-05-01 Implementation
State Administration for Market Regulation
Issued by China National Standardization Administration
Table of contents
Preface Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Classification and marking 2
5 General requirements 3
6 Requirements 3
7 Test method 5
8 Inspection rules 7
9 Marking, packaging, transportation and storage 9
Appendix A (Normative Appendix) Test methods for air filter resistance, counting efficiency and PMx purification efficiency 10
Appendix B (Normative Appendix) Air filter weight efficiency and dust holding capacity test method 16
Appendix C (Normative Appendix) Air Filter Antistatic Test Method 20
Appendix D (Normative Appendix) Test method for increase in ozone concentration of electrostatic air filter 21
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 14295-2008 "Air Filter". Compared with GB/T 14295-2008, the main technical changes are as follows.
---Modified the classification and marking methods of products;
---Added PMx purification efficiency requirements and test methods;
---Added requirements and test methods for the rated power and working voltage of the electrostatic air filter;
---Modified the limit requirements for the increase in ozone concentration of the electrostatic air filter;
---Added requirements for test instruments;
---Added the performance requirements for the air filter test device;
---Added the antistatic test method of the air filter;
---Modified the requirements of the standard test dust for the air filter dust holding capacity test, and increased the dust holding capacity limit.
This standard was proposed by the Ministry of Housing and Urban-Rural Development of the People's Republic of China.
This standard is under the jurisdiction of the National Standardization Technical Committee for HVAC and Purification Equipment (SAC/TC143).
The organization responsible for drafting this standard. China Academy of Building Research Co., Ltd.
Participated in the drafting of this standard. Tsinghua University, Academy of Military Sciences Chemical Defense Research Institute, National Environmental Protection Equipment Quality Supervision and Inspection Center (Jiangsu),
Beijing Oriental Measurement and Testing Institute, Suzhou Huatai Air Filter Co., Ltd., Heshi (Suzhou) Special Materials Co., Ltd., Zhejiang Jinhaihuan
Environmental Technology Co., Ltd., Honeywell Environmental Automation Products (Tianjin) Co., Ltd., Amic Air Filter (Suzhou) Co., Ltd.,
Ai (China) Environmental Purification Co., Ltd., Guangzhou Industrial Microbiology Testing Center, Nanjing Tianjia Environmental Technology Co., Ltd., TSI China
Company, Zhejiang Manruid Environmental Technology Co., Ltd., Zhejiang Dunan Artificial Environment Co., Ltd., Dandong Shifa Industrial Filter Cloth Co., Ltd.,
Dandong Tianhao Purification Material Co., Ltd., Suzhou Beian Electronic Technology Co., Ltd., Shanghai Jiefeiran Environmental Technology Co., Ltd., Hefei Midea Warm
Tong Equipment Co., Ltd., Apollo Environmental Protection Equipment Co., Ltd., Shunde District, Foshan City, Hebei Zhongkangweier Environmental Technology Co., Ltd., Jiangsu Shengwei
Filtration Equipment Co., Ltd., Shandong Xuesheng Electric Co., Ltd., Guangdong Microbial Analysis and Testing Center, Zhongshan Shangpin Environmental Purification Technology
Co., Ltd., Sichuan Yimikang Environmental Technology Co., Ltd., Guangdong Guohua Civil Air Defense Technology Co., Ltd.
The main drafters of this standard. Wang Zhichao, Xu Zhaowei, Han Hao, Zhang Zhenzhong, Xu Xiaohao, Xiao Yiqun, Huang Luying, Li Jiandong, Wang Zhiyong,
Yang Yingxia, Hou Yinyan, Zheng Yu, Ji Qizheng, Jiang Longhao, Zheng Hui, Feng Weihao, Du Shaoping, Wu Xiaoquan, Zhang Jianhua, Chen Wei, Li Li, Gao Shan, Xing Chunshuang,
Wang Weiran, Zhou Ye, Chen Zhan, Zhong Yaowu, Chen Long, Luo Fan, Zhang Lisong, Xie Xiaobao, Huang Hai, Huang Cunyong, Guo Fusong, Chen Weizhong.
The previous versions of the standard replaced by this standard are as follows.
---GB/T 14295-1993, GB/T 14295-2008.
air filter
1 Scope
This standard specifies the terms and definitions, classification and marking, general requirements, requirements, test methods, inspection rules, signs, and
Packaging, transportation and storage.
This standard applies to air filters for ventilation, air conditioning and air purification systems or equipment.
This standard does not apply to air filters with high efficiency and above.
2 Normative references
The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 191 Packaging, storage and transportation pictorial signs
GB/T 1019 General rules for packaging of household and similar electrical appliances
GB/T 1236 Standardized air duct performance test for industrial ventilators
GB/T 2828.1 Sampling inspection procedure by attributes Part 1.Batch inspection sampling plan retrieved by acceptance quality limit (AQL)
GB 4706.1 Safety of household and similar electrical appliances Part 1.General requirements
GB 8624 Classification of burning performance of building materials and products
GB/T 18204.2 Hygienic inspection methods for public places Part 2.Chemical pollutants
GB 50243 Ventilation and air conditioning engineering construction quality acceptance code
JG/T 404 filter material for air filter
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
Equipment that uses filtration, adhesion or charged capture to remove particulate matter in the air.
3.2
After the particles are charged by a high-voltage electrostatic field, they are captured by the dust collecting plate to achieve the removal of airborne particles in the air.
filter.
3.3
Rated air volume
In the standard air state, the air volume flow through the air filter in the nominal unit time.
4 Classification and marking
4.1 Classification
4.1.1 According to the efficiency level, it is divided into coarse efficiency filters, medium efficiency filters, high and medium efficiency filters and sub-high efficiency filters, and the codes are C, Z, GZ respectively
And YG. Among them, coarse-effect filters are divided into coarse-effect type 1, coarse-effect type 2, coarse-effect type 3 and coarse-effect type 4, and the codes are C1, C2, C3 and
C4; Medium-efficiency filters are divided into medium-efficiency type 1, medium-efficiency type 2 and medium-efficiency type 3.The codes are Z1, Z2 and Z3 respectively.
4.1.2 According to the structure type, it is divided into flat type, bag type, folding type, winding type, barrel type, pole plate type and honeycomb type, and the codes are PB, DS, ZZ,
JR, TS, JB and FC.
4.2 Marking
Example 1.Air filter with medium efficiency type 2, bag type, 592mm×592mm×600mm and rated air volume of 3400m3/h, marked as
K-Z2-DS-592×592×600-3400.
Example 2.An air filter with coarse-effect type 3, flat plate, 610mm×610mm×80mm, and rated air volume of.2000m3/h, marked as
K-C3-PB-610×610×80-2000.
Note. The principle of expression of air filter dimensions is. the air flow direction is the depth, and the air flow direction is the vertical length of the vertical section as the height and level.
Length is width.
5 General requirements
5.1 The application of air filter should meet the environmental protection and fire resistance requirements of the occasion.
5.2 The electrostatic air filter should meet the following requirements.
a) The single-phase rated voltage should not be greater than 250V, the three-phase rated voltage should not be greater than 480V, and the rated frequency should be 50Hz;
b) Power-off protection should be provided to ensure that when the unit structure is opened for repair or maintenance, its internal devices are automatically powered off;
c) The electrical safety performance should meet the relevant requirements of GB 4706.1.
5.3 The filter material for the air filter should meet the relevant requirements of JG/T 404.
5.4 The shear strength and tensile strength of the air filter binder should not be lower than the strength of the filter material used, and its temperature and humidity resistance should be the same as the filter material used.
5.5 The sealant for the air filter should be able to ensure that the filter will not crack or degummed during operation under the maximum operating air volume or final resistance condition, and
It is elastic, and its temperature and humidity resistance should be the same as the filter material used.
5.6 The structure of the air filter should meet the following requirements.
a) The frame or support body should have the required strength and rigidity, and should be able to withstand the weight and pressure required for installation, operation and maintenance;
b) The four corners and joints of the frame should not be loose or cracked, and the filter material should not be loose or deformed in the frame;
c) The gasket and the frame should be firmly bonded, and the inner and outer edges of the gasket should not exceed the inner and outer edges of the frame.
6 requirements
6.1 Appearance
6.1.1 The surface of the air filter should be smooth and flat, free of scratches, rust spots, indentations and damage.
6.1.2 The filter material, gasket, protective net and other parts should not be deformed.
6.1.3 The shell of the electrostatic air filter should be marked with electrical safety warnings and electrical terminal wiring diagrams.
6.2 Dimensional deviation
6.2.1 Dimensions
The allowable deviation of the external dimensions is shown in Table 1.
Table 1 The allowable deviation of external dimensions in millimeters
6.2.2 Flatness
The flatness of the end face and side plate of the sub-high efficiency filter should not be greater than 1.6mm.
6.3 Resistance and efficiency
6.3.1 In the initial state, the air filter resistance, weighing efficiency and counting efficiency should meet the requirements of Table 2.
Table 2 Resistance and efficiency of air filter under rated air volume
6.3.2 For products with a nominal PMx purification efficiency, the difference between the nominal efficiency value and the measured efficiency value should not exceed 5%.
6.4 Dust holding capacity
The air filter should have a nominal dust holding capacity index, the actual measured value should not be less than 90% of the nominal value, and should not be less than 36mg/(m3/h).
6.5 Cleaning
The efficiency of the cleanable air filter after cleaning should not be less than 85% of the efficiency before cleaning, and the resistance should not be greater than the resistance before cleaning
150% of it.
6.6 Antistatic
For air filters with charged filter media, the efficiency after antistatic treatment should be nominal, and the difference between the nominal efficiency value and the measured efficiency value should not be large
Less than 5%.
6.7 Fire protection
When the air filter has fire protection requirements, it should meet the relevant regulations of GB 8624.
6.8 Rated power
For an electrostatic air filter with a nominal value not greater than 30W, the actual measured value should not be greater than 120% of the nominal value; for the nominal value greater than
For a 30W electrostatic air filter, the measured value should not be greater than 110% of the nominal value.
6.9 Working voltage
For the ionization voltage and dust collection voltage of the electrostatic air filter, the deviation between the measured value and the nominal value should be within ±5%.
6.10 Increase in ozone concentration
Under the rated air volume and working voltage, the 1h average value of the increase in ozone concentration of the electrostatic air filter should not exceed 0.05mg/m3.
6.11 Electrical safety
6.11.1 Electric strength
After applying the test voltage to the electrostatic air filter, there should be no breakdown or flashover.
6.11.2 Leakage current
The cold leakage current value between the exposed metal part of the electrostatic air filter and the power cord should not be greater than 0.75mA (Class I) or
0.25mA (Class II).
6.11.3 Grounding resistance
The resistance value between the exposed metal part of the electrostatic air filter and the ground terminal should not be greater than 0.1Ω.
7 Test method
7.1 Test instrument
The test instrument should meet the requirements of Table 3.
Table 3 Test instrument
7.2 Appearance
Apply visual inspection.
7.3 Dimensional deviation
7.3.1 Dimensions
Use vernier calipers to check.
7.3.2 Flatness
Check with flat plate and feeler gauge
7.4 Resistance and efficiency
Resistance, counting efficiency and PMx purification efficiency should be tested according to the method specified in Appendix A, and the weight efficiency should be tested according to the method specified in Appendix B.
7.5 Dust holding capacity
The dust holding capacity should be tested according to the method specified in Appendix B.
7.6 Cleaning
The cleaning should be carried out according to the cleaning method given by the manufacturer, and the efficiency and resistance after cleaning should be tested according to the method specified in Appendix A or Appendix B.
7.7 Antistatic
Static elimination should be tested according to the method specified in Appendix C, and the efficiency and resistance after static elimination should be tested according to the method specified in Appendix A.
7.8 Fire protection
Air filters with fire protection requirements shall be tested for fire protection according to the method specified in GB 8624.
7.9 Rated power
The rated power of the electrostatic air filter shall be tested according to the method specified in GB 4706.1.
7.10 Working voltage
The working voltage of the electrostatic air filter should be tested according to the method specified in GB 4706.1.
7.11 Increase in ozone concentration
The increase in ozone concentration should be tested in accordance with the method specified in Appendix D.
7.12 Electrical safety
7.12.1 Electric strength
The electric strength should be tested according to the method specified in GB 4706.1.
7.12.2 Leakage current
The leakage current should be tested according to the method specified in GB 4706.1.
7.12.3 Grounding resistance
The grounding resistance should be tested according to the method specified in GB 4706.1.
8 Inspection rules
8.1 Inspection classification
The air filter inspection is divided into factory inspection and type inspection.
8.2 Factory inspection
8.2.1 The air filter shall be inspected by the quality inspection department of the manufacturer before leaving the factory.
8.2.2 The factory inspection shall be carried out item by item according to the provisions of Table 4.
Table 4 Inspection items
8.3 Type inspection
8.3.1 Type inspection shall be carried out in one of the following situations.
a) When the new product is finalized or the old product is transferred to the factory to produce trial products;
b) When there are major changes in product structure, manufacturing processes or materials;
c) When production is resumed after the product has been discontinued for more than one year;
d) There is a big difference between the factory inspection result and the last type inspection.
8.3.2 Sampling for type inspection shall be randomly selected from the samples that have passed the factory inspection, and the sampling method shall comply with the relevant provisions of GB/T 2828.1.
8.3.3 Type inspection items are shown in Table 4.
8.3.4 Judgment rules. if any item is unqualified, double sampling, if it is still unqualified, it is a substandard product, otherwise it is a qualified product.
9 Marking, packaging, transportation and storage
9.1 Logo
Each air filter should have a label fixed at an obvious position, and the label should be firmly fixed to the filter frame. The direction of the airflow or air inlet/outlet should be marked
The location of the mouth, the content should at least include.
a) The manufacturer's name, trademark or logo;
b) Product name, mark and model;
c) Basic performance parameters (dimensions, rated air volume, resistance, efficiency, efficiency after static elimination, weight efficiency, dust holding capacity, rated power,
Ionization voltage, dust collection voltage, increase in ozone concentration, etc.);
d) Factory date and factory number.
9.2 Packaging
9.2.1 The air filter should be packaged according to the relevant regulations of GB/T 191 and GB/T 1019.
9.2.2 The product certificate and installation instructions should be attached in the packing box.
9.2.3 The content of the product certificate shall include at least.
a) Product name and model;
b) Product factory number;
c) Inspection conclusion;
d) Inspector's signature or seal;
e) Date of inspection.
9.2.4 The content of the product installation and operation manual should at least include.
a) Product name and model;
b) working principle;
c) Implementation standards;
d) Main technical parameters;
e) Attachment catalog;
f) Installation instructions and requirements;
g) Instructions for use, maintenance and maintenance precautions.
9.3 Transportation
The air filter should not be collided, squeezed, thrown or thrown during transportation, and should not be subjected to strong vibration, rain, dampness and sun exposure.
9.4 Storage
The air filter should be stored in a normal temperature, dry, ventilated, non-corrosive and explosive gas warehouse, and should be protected from product collision
Measures.
Appendix A
(Normative appendix)
Test method for air filter resistance, counting efficiency and PMx purification efficiency
A.1 Test device
A.1.1 Air duct system
A.1.1.1 Structure
The structure and size diagram of the air duct system is shown in Figure A.1.The production and installation of the air duct system should comply with the relevant regulations of GB 50243, and
The following requirements should be met.
a) When the air filter section size is different from the test air duct section, the pipe section used to install the tested air filter should adopt a reduced diameter
The structure and size of the tube are shown in Figure A.2;
b) When measuring efficiency, the structure and size of the sampling tube are shown in Figure A.3.The selection of the diameter of the sampling tube mouth should consider the approximate isokinetic force.
The flow conditions, that is, the suction speed of the sampling nozzle and the wind speed in the air duct should be similar, and the deviation should not be greater than ±10%. When the wind speed in the duct
When the speed of the sampling nozzle is similar, the sampling pipe should adopt the type of Figure A.3a); when the wind speed in the air duct is lower than the speed of the sampling nozzle, the sampling
The sample tube should adopt the type shown in Figure A.3b); when the wind speed in the air duct is higher than the speed of the sampling nozzle, the sampling tube should adopt the type shown in Figure A.3c);
c) The structure of the static pressure ring shall comply with the relevant regulations of GB/T 1236;
d) The air duct system of the test device can be positive pressure or negative pressure;
e) The structure of the air duct system can be linear or U-shaped;
f) The entire air duct system has strict requirements. Before it is put into use, pressure leak detection should be carried out according to the relevant regulations of GB 50243.
The air leakage of the air duct system should not be greater than 1.64m3/(h·m2).
A.1.1.2 Test air
A.1.1.2.1 The air inlet of the test device should be equipped with at least two levels of air filters (the last level is a high-efficiency filter), and the background of particles in the air duct
The concentration should not exceed 1% of the concentration of aerosols to ensure that the air entering the air duct is clean.
A.1.1.2.2 The temperature of the test air should be controlled at (23±5)℃, and the relative humidity should be controlled at (45±10)%.
A.1.1.2.3 The exhaust of the test bench can be exhausted to the outdoors, after treatment, it can be exhausted to the room or recycled.
A.1.1.3 End filter
The sub-high efficiency and above air filter should be used as the end filter of the test device to filter the exhaust air.
A.1.2 Aerosol generator for efficiency test
A.1.2.1 The aerosol generating solution should be a potassium chloride (KCl) solution with a mass fraction of 10%, and analytically pure KCl powder (purity ≥
99.5%) for preparation.
A.1.2.2 The test aerosol that occurs should be polydisperse solid phase potassium chloride (KCl) particles, and the particle size range should be 0.3μm~10.0μm.
The distribution should meet the requirements of Table A.1.
Table A.1 Aerosol particle size distribution table
A.1.2.3 The aerosol generator should include a dryer and an electrostatic neutralizer.
A.1.3 Test device performance
A.1.3.1 Test device performance requirements
The performance requirements of the test device are shown in Table A.2.
Table A.2 Test device performance requirements
Test device performance requirements
Wind speed uniformity Wind speed variation coefficient CVf< 10%
Aerosol concentration uniformity aerosol concentration uniformity variation coefficient CVj< 15%
Aerosol concentration stability aerosol concentration stability variation coefficient CVw< 10%
Air resistance in test section< 5Pa
Leakage counting efficiency (particle size ≥0.5μm) >99%
A.1.3.2 Wind speed uniformity test
A.1.3.2.1 Measure the wind speed at 9 evenly distributed points on the air duct section (see Figure A.4) to determine the uniformity of the wind speed of the test device.
The measuring section should be located in the upstream section close to the tested air filter, and the test test should be at 25% Qmax, 50% Qmax and Qmax (Qmax is the test
Check the maximum air volume of the device).
A.1.3.3 Aerosol concentration uniformity test
A.1.3.3.1 Measure the count concentration (≥0.5μm) or PMx concentration (see Figure A.4) at 9 evenly distributed points on the air duct section to confirm
To determine the uniformity of the aerosol concentration of the test device, the measurement section should be located in the upstream section close to the air filter under test.
25% Qmax, 50% Qmax and Qmax (Qmax is the maximum air volume of the test device) air volume.
A.1.3.4 Aerosol concentration stability test
A.1.3.4.1 The aerosol concentration stability test should be performed at 25% Qmax, 50% Qmax and Qmax (Qmax is the maximum air volume of the test device).
The sampling point should be located at the center of the cross section. After the aerosol has stabilized, measure the aerosol count concentration (≥0.5μm) or PMx concentration.
The degree of stability within 30 minutes is measured once per minute.
A.1.3.5 Test section air resistance test
Without installing the tested air filter, adjust the air volume of the test device to 3400m3/h (when the test device is designed
When the maximum air volume Qmax is greater than 3400m3/h) or Qmax (when the maximum air volume Qmax designed by the test device is less than 3400m3/h), test
The air resistance of the inspection section is tested.
A.1.3.6 Leakage test
When the test device is installed with a high-efficiency air filter, adjust the air volume of the test device to 3400m3/h (when the test device is
Set the design maximum air volume Qmax greater than 3400m3/h) or Qmax (when the test device design maximum air volume Qmax is less than 3400m3/h
Time), the counting efficiency (particle size ≥ 0.5μm) test.
A.2 Measuring instruments
The test instrument used for testing shall meet the requirements of 7.1.
A.3 Test method
A.3.1 Installation of the tested air filter
Install the tested air filter on the test air duct to ensure that no leakage occurs at the installation frame.
A.3.2 Resistance test
Start the fan, test the resistance at 50%, 75%, 100% and 125% of the rated air volume, and draw the air volume resistance curve.
A.3.3 Counting efficiency test
A.3.3.1 Start the fan and adjust the air volume to the rated air volume of the air filter under test.
A.3.3.2 Turn on the aerosol generator, and after it stabilizes, use a particle counter at the upstream and downstream sampling locations of the air filter to be tested.
When testing, the concentration of aerosols should ensure that the number of particles sampled in each downstream concentration test is not less than 100.
A.3.3.3 Wh...
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