Some standard content:
GB/T 2658—1995
This standard is a revised version of GB265887 General Technical Conditions for Small AC Fans. The purpose of this revision is to make the standard more applicable to the production and use of civil fans. This standard will have a significant guiding significance for the future development of civil fans. This standard is a general technical condition for products and should be used together with special technical conditions. Compared with the previous version, this standard has been modified as follows: --- It is written in the format specified in GB/T1.1-1993: - The airflow characteristics test method adopts the American Ventilation and Air Conditioning Association standard AMCA21 (-71\T wind chamber device is equipped with multiple nozzles in the wind case\ method, which is consistent with the internationally accepted test method; - The noise level measurement adopts the internationally accepted test method and sound pressure level meter unit; "self-vibration" and "power supply voltage and frequency change\ requirements are deleted. For fans with a fan number of 145 and above, the insulation dielectric strength test voltage (effective value) is also increased from 1000V to 1500V. This standard will replace GB265887 from the date of entry into force. Appendix A of this standard This is the appendix of the standard. This standard is proposed by the Ministry of Electronics Industry of the People's Republic of China. This standard is under the jurisdiction of the National Micro Motor Standardization Technical Committee. This standard was drafted by Suzhou Telecom Motor Factory. The main drafters of this standard are Wu Xianguang, Zhou Zhiyuan, Du Hongfu, Feng Ronglin, and Huang Xicheng. 1 Scope
National Standard of the People's Republic of China
General Technical Conditions for Small AC Blowers
ACminialure blowers.
General specification for
GB/T 26581995
Replaces 52657
This standard specifies the classification, general technical requirements, test methods, inspection rules, marking, packaging, transportation and storage requirements of small AC fans with a blade diameter of no more than 300 mm (hereinafter referred to as fans). This standard is applicable to fans used as cooling pipes for automatic control equipment, electronic equipment and other instruments. AC fans with a blade diameter of more than 3 tmm can also refer to this standard. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB2423.1-89 Basic environmental test procedures for electrical and electronic products Test A: Low temperature test method GB2423.2-89 Basic environmental test procedures for electrical and electronic products Test B: High temperature test method Basic environmental test procedures for electrical and electronic products: Test Ca: Steady damp heat test method GB 2423. 3—93
GB 2423. 493
GB2423.5-81
GB 2423. 10—81
GB 2123, 15—81
Basic environmental test procedures for electrical and electronic products Test Db: Alternating damp heat test piece method Basic environmental test procedures for electrical and electronic products Test Ea: Impact test method Basic environmental test procedures for electrical and electronic products Test IFc: Vibration (sinusoidal) test method Basic environmental test procedures for electrical and electronic products GB2423.16—90
GB2423.17—93
GH 2423. 21—91
GB 2423. 29—82
Electrical Engineering. Basic Environmental Test Procedure for Electronic Products Electrical Engineering. Basic Environmental Test Procedure for Electronic Products Test Ga: Acceleration test method
Test J Mildew test force method
Test Ka: Salt spray test method
Basic Environmental Test Procedure for Electrical and Electronic Products Test M: Low pressure test method Basic Environmental Test Procedure for Electrical and Electronic Products Test U: Strength of lead terminals and integral mounting parts GB282887 Batch inspection counting sampling procedure and sampling table (applicable to continuous inspection) GB5872·85 Technical conditions for packaging of controlled micromotors GB6833.9-87 Test specification for electromagnetic compatibility of electronic measuring instruments Conducted interference test GB6833.10—87 Test specification for electromagnetic compatibility of electronic measuring instruments Radiated interference test GB7345—-94 Basic technical requirements for controlled micromotors 3 Requirements
3.1 Classification
3-1.1 The classification of fans is shown in Table 1.
Approved by the State Administration of Technical Supervision in 1995-0829
Implemented in 1996-08-01
Circular axial flow fan
Product name
Spiral axial flow fan (mixing fan)
Centrifugal fan
Cross flow fan
GB/T 2658—1995
3.1.2 The power and frequency of the fan are shown in Table 2. New rated frequency
3.2 Environmental conditions for use
Rated voltage, V
24, 36, 110, 220 380
12.20 26, 36, 60.115.200
3.2.1 The environmental conditions for the use of the fan are divided into 4 levels, as shown in Table 3. Table 3
Environmental condition level
10~-40
—·25--40
—40- 55
- 55~85
Relative humidity
90%~~95%
10~~55Hz
Effective amplitude 1.5mml
10~-500 Iz
Low frequency double amplitude
Peak acceleration
Wind axis, hoist
Wind, axis, screw
Wind, separation
Wind, transverse
11.220.380
Impact peak acceleration
Constant acceleration
3.2.2When Table 3 cannot meet the requirements for the use of the fan, the various parameters of the environmental conditions should be listed in detail in the corresponding special technical conditions. 3.3 Appearance
The fan surface should not have rust, peeling of the coating, bumps, scratches, fasteners should be firmly connected, and the handwriting and content of various marks and nameplates should be clear and correct, and should not fall off.
3.4 Appearance and installation dimensions
The fan appearance and installation dimensions should comply with the provisions of the special technical conditions. 3.5 Lead wires and terminal wax
3.5.1 Lead wire hall style and marking
The fan lead wire can be lead wire, terminal block (column) or threaded terminal. Lead wires and terminal blocks should be intact and firmly connected: the lead wire length should not be less than 200 mm
The fan lead wire marking should comply with the special technical conditions. For single-phase fans, the lead wire color or marking should comply with Figures 1 to 3.
3.5.2 Lead wire and terminal strength
3.5.2.1 Lead wire
Use (2)
GB/T2658—1995
Main group
X·2
Each lead wire should be able to withstand a tensile force of 9N or as specified in the special technical conditions. After the test, the lead wire should not show signs of loosening, wire strand breakage or insulation deformation due to water.
3.5.2.2 Terminal block
Each terminal block should be able to withstand a tensile force of 9V and maintain 5%~105. After the test, the terminal block should not be loose or otherwise damaged.
3.5.2.3 Threaded terminal block
Each threaded terminal block should be able to withstand a torque of 0.15.Nrm and maintain it for 5s~10s. After the test, the threaded terminal block should not be loose or otherwise damaged.
3.6 Wind direction or direction of rotation
The fan should have a wind direction or direction of rotation marked in a conspicuous position on the casing or on the nameplate. The fan should be stable when powered on, without friction or jamming, and its wind direction or direction of rotation should be consistent with the marking. 3.7 Speed
The speed obtained after the fan is preheated (see 5.1.4.2) shall not be lower than the nominal speed specified in the special technical conditions. The speed measured after each test of the fan is called the subsequent speed. Unless otherwise specified, the subsequent speed shall not be lower than the nominal speed. 3.8 Current
The current of the fan shall comply with the provisions of the special technical conditions. 3.9 Input power
GB/T 2658--1995
The input power of the fan shall comply with the provisions of the special technical conditions. 3.10 Low voltage starting
The fan shall be able to start and operate continuously at 85% of the rated voltage, and its starting time shall not exceed 20 s. 3.11 Insulation Dielectric Strength
The insulation dielectric strength test between the fan winding and the casing should be able to withstand the test voltage specified in Table 1 for 1 minute. There should be no insulation breakdown or flashover during the test. The leakage current should not be greater than 5 beats A (peak value). The leakage current of the winding does not include the current consumed by the equipment. When repeating the insulation dielectric strength test, the test voltage value is 80% of the value specified in Table 4. Table 4
Rated voltage of fanbzxz.net
Test voltage (with micro value)
24.36,36,60
Note: 1) The fan number is expressed in millimeters of the fan blade diameter. 3.12 Insulation resistance
110,115
125 Fan No. 1:
and below
115 Fan
and above
Under the extreme low temperature environment conditions specified in the positive belt test conditions and special technical conditions, the insulation resistance of the fan winding to the machine should not be less than 100Mα: Under the corresponding extreme high temperature environment conditions, the insulation resistance should not be less than 10Mn. The voltage value of the megohmmeter used for insulation resistance inspection should comply with the provisions of Table 5. Table 5
Dielectric strength test voltage
400~-1000
1500~800
3.13 Inter-turn insulation dielectric strength
The fan should have no inter-turn breakdown and overheating after running for 3 minutes at 130% of the rated voltage. 3.14 Airflow characteristics
The airflow characteristics of the fan shall comply with the special technical conditions. 3.15 Temperature rise
The windage moisture rise of the fan shall comply with the special technical conditions. 3.16 Noise
The sound pressure level of the fan shall comply with the special technical conditions. 3.17 Low temperature
Megohmmeter voltage
The fan shall withstand the low temperature test under the extreme low temperature environment conditions specified in the special technical conditions, and shall comply with the following provisions after the test:) The insulation resistance shall comply with the provisions of 3.12
b The starting time shall not be greater than 5 nin;
c) The subsequent speed shall not be less than 80% of the nominal speed; d) The parts shall not crack and other abnormal phenomena. 3.18 High temperature test The fan shall be subjected to the high temperature test under the extreme high temperature environment conditions specified in the special technical conditions, and shall meet the following requirements after the test: a) Insulation resistance shall meet the requirements of 3.12: b) The fan shall be free of oil loss, deformation of parts and other abnormal phenomena. 3.19 Low pressure When the special technical conditions require, the fan shall be subjected to the low pressure test specified in the special technical conditions, and shall meet the requirements of the special technical conditions after the test.
3.20 Vibration
The fan shall be subjected to the vibration test specified in 4.25 of GL/T7345, and shall meet the following requirements after the test: a) There shall be no looseness or damage to the parts; b) The current shall meet the requirements of 3.8;
) The input power shall meet the requirements of 3.9;
) The subsequent speed shall meet the requirements of 3.7:
-) The noise shall meet the requirements of 3.16.
The fan shall be subjected to the impact test specified in 4.26 of GB/T7345, and shall meet the following requirements after the test: a) There shall be no looseness or damage to the parts; b) The current shall meet the requirements of 3.8:
) The input power shall meet the requirements of 3.0;
d) The subsequent speed shall meet the requirements of 3.7;
e) The noise shall meet the requirements of 3.16.
3.22 Constant speed
The fan shall be subjected to the constant acceleration test specified in the special technical conditions. The test is carried out in six directions of three perpendicular axes, and each force interval test is 5 min + a total of 30 min. After the test, it shall meet the following requirements: a) There shall be no looseness or damage to the parts; b) The current shall comply with the provisions of 3.8; c) The input power shall comply with the provisions of 3.9; d) The subsequent speed shall comply with the provisions of 3.7; e) The noise shall comply with the provisions of 3.16.
3.23 Damp heat
3.23.1 Constant damp heat
This project only assesses fans with environmental conditions of level 1a, level 1 and level 2 in Table 3 or fans with similar environmental conditions. The fan shall be subjected to a constant damp heat test with a temperature of 40.1.2℃ and a relative humidity of 90% to 95% for 1 day. After the test, it shall meet the following requirements:
a) The insulation resistance shall be measured in the box. Its value shall not be less than 1Ma: b) The fan shall not have obvious surface quality deterioration and rust that affects the normal operation; (:) After recovering for 2 hours under normal test atmospheric conditions, the repeated insulation dielectric strength test shall meet the requirements of 3.11. 3.23.2 Alternating damp heat
This item is only tested for fans with environmental conditions of level 3 in Table 3 or similar environmental conditions. The fan shall be subjected to an alternating damp heat test with a temperature of 55±2℃ and a duration of 6 days. After the test, the following provisions shall be met: a) The fan shall not have obvious deterioration of surface quality and rust that affects normal operation; b) The fan shall be placed under normal test atmospheric conditions, apply rated voltage and rated frequency for 24 hours, and then be left alone for 2 hours. The insulation resistance shall not be less than 50M2;
1) After measuring the insulation resistance, the repeated insulation dielectric strength test shall comply with the provisions of 3.11. 3.24 Electromagnetic interference
When the special technical conditions require, the conducted interference level of the fan shall not exceed the A-level limit value in Figure 1 of GB6833.9, and its radiated interference level shall not exceed the A-level limit value in Table 1 of GB6833.10. 3.25 Salt spray
GB/T 26581995
When the special technical conditions require, the fan shall withstand a 48-hour salt spray test. After the test, the fan shall be disassembled for inspection, and no part shall have obvious corrosion or destructive changes.
When the special technical conditions require, the fan shall be subjected to a 28-day long test. After the test, the fan length shall not exceed the level 2 specified in G132423.16 or the special technical conditions. 3.27 High-energy life
The fan shall be subjected to a life test under extreme ambient high temperature conditions specified in the special technical conditions, and the test time is 1000 hours. After the test, it shall meet the following requirements:
a) The subsequent speed shall not be less than 90% of the nominal speed; b) The current shall comply with the provisions of 3.8;
c) The input power shall comply with the provisions of 3.9. 3.28 Weight
The weight of the fan shall comply with the special technical conditions. 4 Inspection rules
4.1 Delivery inspection
"Inspection items shall be as specified in Table 6.
Factory inspection sampling is carried out according to the normal inspection level-sub-sampling plan in GB2828, and its qualified quality level (AQL) is as specified in Table G.
Factory inspection means that if one or more items of the fan are unqualified, the fan is unqualified. If the factory inspection is qualified, the user should accept the batch except for the unqualified products in the random inspection. If the factory inspection is unqualified, the whole batch will be rejected, and the manufacturer will eliminate the defects and remove the unqualified products before submitting them for acceptance again. 4.2 Type inspection
4.2.1 Type inspection shall be conducted in the following cases: a) Finalized product;
b) For finalized product, when the change of electromagnetic design, mechanical structure or process and materials used in manufacturing process is enough to cause performance and parameter change, it is allowed to conduct relevant project tests according to the possible impact of the above changes: c) When the product is stopped for a long time and resumes production; d) When the product is in normal production, type inspection shall be conducted once a year, at which time, salt spray, mildew growth and high temperature life test items may not be conducted. When the product production batch is small, the manufacturer and the user shall negotiate separately. 4.2.2 Number of prototypes
Six prototypes shall be selected from the products that can represent the corresponding production stage, of which four shall be used as test prototypes and one shall be used as storage comparison prototypes. Two prototypes can be used for high temperature life test. 4.2.3 Evaluation of type inspection results
As long as any item of a prototype fails and does not belong to one of the following situations, the type inspection is not qualified. a) When the appraisal department determines that a certain non-conforming item of the prototype is of a non-conforming nature, it is allowed to replace it with a new prototype of the same number, and make up for the items that have been done, and then continue the test. If any item of another prototype fails, the type inspection fails. b) When the performance of the prototype is seriously reduced after the environmental test and the environmental test, which affects the usability, the appraisal department can take two measures: either consider the appraisal to be unqualified, or when a prototype fails, it is allowed to replace it with two new prototypes, and make up for the tests that have been done, and then make up the original number of prototypes to continue the test. If any item of another prototype fails, the type inspection fails. 4.2.4 Type Appraisal of Products of the Same Type When submitting two or more models for type appraisal of similar fans at the same time, four prototypes of each model shall be submitted. All prototypes shall pass the factory inspection of GB/T 26581995. Four representative prototypes of different models shall be selected for the remaining required tests. After the prototype model is selected, it is not allowed to be replaced. The inspection results shall be evaluated as follows. 4.2.3 If the type inspection fails, all submitted models shall not pass the appraisal. If the type inspection passes, all submitted models shall pass the appraisal. Products of the same type with the same structural dimensions and performance produced thereafter may no longer be subject to type appraisal. 4.2.5 Type inspection items and basic technical sequence The type inspection items, basic technical sequence, number of prototypes and abbreviations of fans shall be as specified in Table 6. 6
Appearance, installation and design
Wiring method and marking
Wind direction or turn
Low voltage starting
Insulation dielectric strength
Insulation resistance
Insulation dielectric strength
Lead wire and terminal strength
Air flow characteristics
"Low pressure"
Steady state damp heat
Alternating damp heat
"Electromagnetic interference"
High temperature life
Technical requirements
Test and filtering
Note: 1) Special tests are only carried out when required by special technical cases. 2) Two more prototypes may be taken for testing (then 1.2.2) Type test
Prototype number
.2,3.4
1-2,3,4
1,2,3,4
Factory inspection
Qualified quality level (AQL.)
5 Test method
5.1 Test conditions
5.1.1 Atmospheric conditions
GB/T 2658---1995
Normal test atmospheric conditions, standard atmospheric conditions for test components and standard atmospheric conditions for basic reference shall be in accordance with 5.1.1~5.1.3 of GB/T7345.
5.1.2 Test power supply
The voltage waveform of the test power supply shall have a non-sinusoidal distortion of no more than 5%. The voltage tolerance of the test power supply is ±1% of the rated value, and the frequency tolerance is ±1% of the rated value.
5.1.3 Test equipment
Unless otherwise specified, the accuracy of the instruments and equipment used in the test shall not be lower than Class 1 for factory inspection, and shall not be lower than Class 0.5 for type inspection. 5.1.4 Test status
5.1.4.1 Operating status
Except for the airflow characteristic test, all other performance tests are carried out when the fan is in the operating state at the rated voltage and rated frequency. 5.1.4.2 Preheating
Before the speed, current, input power and airflow characteristic tests, the fan shall be preheated with the rated voltage and rated frequency. If the fan runs continuously for 3 minutes, it is considered that the fan has reached thermal equilibrium, that is, the preheating process is completed. If the time interval between the two tests is less than 3 hours, the test may not be carried out between the two tests.
5.2 Appearance
Check the appearance of the fan, and the result shall comply with the provisions of 3.3. 5.3 Appearance and installation dimensions
Use a tool that can ensure the accuracy of the size to check the appearance and installation dimensions of the fan. The result shall comply with the provisions of 3.1. 5.4 Outlet wiring method and marking
Check the fan outlet wiring and marking, and use a tool that can ensure the accuracy of the size to measure the length of the lead wire. The result shall comply with the provisions of 3.5.1. 5.5 Wind direction or turning
Check the wind direction or turning mark of the fan. Wiring shall be carried out according to the special technical conditions or the provisions of 3.5.1: The fan is applied with rated voltage and rated power, and the result shall comply with the provisions of 3.6.
5.6 Speed
Apply rated voltage and rated frequency to the fan, and use a tachometer with an accuracy of not less than +2% to measure its speed. The result should comply with the provisions of 3.7.
5.7 Current
Apply rated voltage and rated frequency to the fan, and use an AC ammeter to measure the current. The result should comply with the provisions of 3.8. 5.8 Input power
Apply rated voltage and rated frequency to the fan, and use an AC power meter to measure the input power. The result shall comply with the provisions of 3.9. 5.9 Low-voltage starting
When the fan is in a stationary state, the rated frequency and 85% rated voltage are applied. The fan shall be able to start and run continuously. The starting time shall comply with the provisions of 3.10.
5.10 Insulation dielectric strength
The fan shall be subjected to insulation dielectric strength test in accordance with the provisions of 5.17 of GB/T7345. The result shall comply with the provisions of 3.1. When conducting factory tests, the insulation dielectric strength test of the fan is allowed to be replaced by a test with a test voltage value of 120% of the provisions of 3.11 and a duration of 1.
5.11 Insulation resistance
The fan shall measure the insulation resistance of the fan winding to the machine with a megohmmeter in accordance with 3.12. The result shall comply with the provisions of 3.12. 5.12 Dielectric strength of insulation
GB/T 2658:1995
The fan is subjected to rated power and 130% rated voltage and runs continuously for 3 min. The result shall comply with the provisions of 3.13. 5.13 Strength of lead wires and terminals
5.13.1 Lead wires
The open end of the lead wire of the fan is sent vertically downward and gradually (without any impact) a force specified in 3.5.2.1 is applied to the outer terminal of the lead wire, and the insulation layer of the conductor core is evenly stressed. Then it is maintained for 5 to 10 seconds. The result shall comply with the provisions of 3.5.2.1. 5.13.2 Lug column)
Fix the fan, and apply the tensile force specified in 3.5.2.2 to the end of the lug (column) in the direction of force 1 away from the test sample (without any impact), and then maintain it for 5 to 10 seconds. The result should comply with the provisions of 3.5.2.2. 5.13.3 Threaded connection
The fan shall be subjected to the threaded connection strength test according to the method specified in Chapter 5 Test Ud of GB2423.29, and the torque specified in 3.5.2.3 shall be applied during the test. The result should comply with the provisions of 3.5.2.3. 5.14 Airflow characteristics
The airflow characteristics of the fan shall be measured according to the provisions of Appendix A (Appendix of the standard) "Test method for airflow characteristics of small fans", and the result should comply with the provisions of 3.14.
The fan is installed on an insulated bracket (heat transfer through mounting screws and other connectors should be avoided, and the fan should not be affected by external heat radiation and airflow). First, place the fan at room temperature for 2 hours to reach a stable non-operating temperature. Then measure the DC resistance of the fan winding (semi-electric measurement method should be in accordance with GB/T73t5 Figure 6 Temperature rise test circuit diagram 3), and record the room temperature. Then apply rated voltage and rated power to the fan to operate until the stable operating temperature t (that is, the surface humidity of the casing changes by no more than 0.5℃ within 30 minutes. When using live measurement, read the winding temperature once per minute, and 5 consecutive readings are equal), then measure the point current resistance R of the same winding: record the temperature at this time
and calculate the temperature rise of the fan winding according to the formula. The result should meet the requirements of 3.15. 0=RR
Where: ----Temperature rise of fan winding, K;
I(235 +-)) / (tt)
R，——(1) If the measurement is carried out by the live method, R is the DC resistance value of the measured winding when it reaches the steady-state working temperature (t); (2) If the measurement is carried out by the non-live method, starting from the power-off, a DC bridge is used to measure the resistance curve of the winding with time, then R is the resistance value extrapolated from the curve to the time (the instant of power-off), R is the DC resistance value of the measured winding at the initial measurement temperature (,), α: the room temperature when the maximum winding resistance R is measured, C
t, the room leakage when the winding resistance R is measured, 5.16 Noise
The fan is fixed on an elastic bracket so that the fan can vibrate along all rays and is located in the center of the semi-anechoic room or the fully anechoic room. The fan axis is 1m away from the air outlet, as shown in Figure 4, and the fan is operated at rated voltage and rated frequency. The fan mains noise level (A-weighted network) is measured with a level meter, and the result shall comply with the provisions of 3.16. 5.17 Low temperature test GB/T2658—1995 The fan is subjected to a low temperature test according to the test method Ad in GB2423.1, and the test limit low temperature value is in accordance with the provisions of 3.17, and the time is 2h. After the test, the insulation resistance is measured in the box, and then the rated voltage and rated frequency are applied, and the starting time and subsequent speed are measured. After the fan is removed from the pin, its components are checked, and the results shall comply with the provisions of 3.17. 5.18 High temperature test The fan is subjected to a high temperature test according to the test method Bd in GB2423.2, and the test limit high temperature value is in accordance with 3.18. During the test, the rated voltage and rated frequency are applied, and the machine is operated continuously for 2 hours. After the test, the insulation resistance is measured, and the components are checked, and the results shall all comply with the provisions of 3.18.
5.19 Low pressure
The fan is subjected to the low pressure test in reverse according to the provisions of GB2423.21. The fan is placed in the test box, and the rated voltage and rated frequency are applied to the power supply for operation. Then the air pressure in the box is reduced to the air pressure value specified in the special technical conditions, and the duration is 5 minutes. The results shall comply with the provisions of 3.19. 5.20 Vibration
The fan is subjected to the vibration test in accordance with the sweep frequency test in GB2423.10. The fan is firmly mounted on the test bracket, and the bracket is fixed on the test table. The bracket should transmit the vibration to the fan with minimal loss. The test board itself is not allowed to produce latent vibration within the test frequency range. During the whole test, the fan is continuously operated with the rated voltage and rated frequency. The test is carried out in three mutually perpendicular directions (one of which is the axis direction of the fan. The sweep frequency range, amplitude value and test duration shall be in accordance with 3.20. If a dangerous frequency appears during the initial vibration, the frequency and the applied amplitude value shall be recorded, and the vibration shall be carried out for 30 minutes at the same amplitude value at each dangerous frequency. The test results shall comply with 3.20.
5.21 Impact
The fan shall be subjected to impact test in accordance with GB2423.5. During the whole test, the fan shall be subjected to rated voltage and Rated frequency continuous operation, its peak acceleration, pulse duration, waveform, impact number shall comply with 3.21, and the test results shall comply with 3.21. 5.22 Constant acceleration test of the fan shall be carried out in accordance with GB2423.15. During the whole test process, the fan shall be continuously operated with rated voltage and rated frequency. Its constant acceleration value and duration shall comply with 3.22. The test results shall comply with 3.22. 5.23 Heat filtration
5.23.1 Constant humidity
The fan shall comply with GB 2423.3, the constant mixed heat test shall be carried out. The severity shall be determined in accordance with 3.23.1. The results shall comply with 3.23.1.
5.23.2 Alternating condensation heat
The fan shall be subjected to the alternating damp heat test in accordance with GB2423.4. The severity shall be determined in accordance with 3.23.2. The results shall comply with 3.23.2.
5.24 Electromagnetic ten-fold
The fan shall be subjected to the alternating damp heat test in accordance with GB833.9 and GB6833.10. The fan is subjected to the salt spray test in accordance with the provisions of GB2423.17. During the test, the fan should be placed horizontally in the test chamber. The test duration is 48 hours, and the results should comply with the provisions of 3.25. 5.26 The long-wing
fan is subjected to the mildew test in accordance with the provisions of GB2423.16. The test duration is 28 days, and the results are as follows: The results shall comply with the provisions of 3.26. 5.27 Temperature life
Under the extreme environmental high overflow conditions (tolerance +5C) specified in 3.27, the fan is operated at rated voltage and rated frequency, and the test time is in accordance with 3.27. The fan is placed in the test chamber so that its inlet and outlet are at least within the range of one fan blade diameter without obstacles. After the test, the test temperature is reduced to room temperature, and then the current, input power and subsequent speed are measured. The results shall comply with the provisions of 3.27. 5.28 Weight
GB/T2658--1995
Use a scale with a sensitivity of not less than 1% to weigh the fan, and the result should comply with the provisions of 3.28. 6 Quality Assurance Period
The quality assurance period is the period of responsibility that the manufacturer assumes for the normal storage and use of the fan by the user. The quality assurance period is the sum of the storage period (including the transportation period) and the warranty period calculated from the month the product leaves the factory. The fan storage period is years. The warranty period is calculated from the unpacking of the product packaging, and the fan warranty period is one year. Under the condition of correct storage and use of the fan, the manufacturer shall ensure that the fan works normally within the warranty period (not exceeding the service life). If the product is damaged or fails to work normally due to poor manufacturing quality during the warranty period, the manufacturer shall be responsible for it. 7 Marking, packaging, transportation and storage
7.1 Marking
Each fan shall have a nameplate; the words and graphics on the nameplate shall be clear and accurate; and it shall be ensured that they will not peel off during the entire service life, and the contents are still clearly legible. The nameplate shall be located in a conspicuous position of the fan. The nameplate shall at least include the following contents:
a) Manufacturer's name or trademark;
b) Product model and name;
e) Manufacturing date or production number;
d) Items deemed necessary by the manufacturer.
7.2 Packaging
The fan packaging shall comply with the provisions of GB5872.
7.3 Transportation
The fan packaging box should be handled with care during transportation. Avoid collision and shock. It is strictly forbidden to put it together with corrosive substances such as acids and alkalis.
The fan should be stored in a clean and well-ventilated warehouse with an ambient temperature of -10 to 35°C and a relative humidity of no more than 85%. The air must not contain corrosive substances.28. 6 Quality Assurance Period
The quality assurance period is the period of responsibility that the manufacturer assumes for the normal storage and use of the fan. The quality assurance period is the sum of the storage period (including the transportation period) and the warranty period calculated from the month the product leaves the factory. The fan storage period is years. The warranty period is calculated from the unpacking of the product packaging, and the fan warranty period is one year. Under the condition of correct storage and use of the fan, the manufacturer shall ensure that the fan works normally within the warranty period (not exceeding the service life). If the product is damaged or cannot work normally due to poor manufacturing quality during the warranty period, the manufacturer shall be responsible for it. 7 Marking, packaging, transportation and storage
7.1 Marking
Each fan should have a nameplate mark; the handwriting and graphics of the nameplate should be clear and correct: and it is guaranteed that it will not peel off during the entire use period, and the content is still clearly legible. The nameplate should be located in a conspicuous part of the fan. The nameplate shall include at least the following information:
a) Manufacturer's name or trademark;
b) Product model and name;
e) Manufacturing date or production number;
d) Items deemed necessary by the manufacturer.
7.2 Packaging
The fan packaging shall comply with the provisions of GB5872.
7.3 Transportation
The fan packaging box or box shall be handled with care during transportation. Avoid collision and impact. It is strictly forbidden to place it together with corrosive substances such as acids and alkalis.
The fan shall be stored in a clean and well-ventilated warehouse with an ambient temperature of -10 to 35°C and a relative humidity of no more than 85%. The air shall not contain corrosive substances.28. 6 Quality Assurance Period
The quality assurance period is the period of responsibility that the manufacturer assumes for the normal storage and use of the fan. The quality assurance period is the sum of the storage period (including the transportation period) and the warranty period calculated from the month the product leaves the factory. The fan storage period is years. The warranty period is calculated from the unpacking of the product packaging, and the fan warranty period is one year. Under the condition of correct storage and use of the fan, the manufacturer shall ensure that the fan works normally within the warranty period (not exceeding the service life). If the product is damaged or cannot work normally due to poor manufacturing quality during the warranty period, the manufacturer shall be responsible for it. 7 Marking, packaging, transportation and storage
7.1 Marking
Each fan should have a nameplate mark; the handwriting and graphics of the nameplate should be clear and correct: and it is guaranteed that it will not peel off during the entire use period, and the content is still clearly legible. The nameplate should be located in a conspicuous part of the fan. The nameplate shall include at least the following information:
a) Manufacturer's name or trademark;
b) Product model and name;
e) Manufacturing date or production number;
d) Items deemed necessary by the manufacturer.
7.2 Packaging
The fan packaging shall comply with the provisions of GB5872.
7.3 Transportation
The fan packaging box or box shall be handled with care during transportation. Avoid collision and impact. It is strictly forbidden to place it together with corrosive substances such as acids and alkalis.
The fan shall be stored in a clean and well-ventilated warehouse with an ambient temperature of -10 to 35°C and a relative humidity of no more than 85%. The air shall not contain corrosive substances.
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