This standard specifies the technical requirements and test methods for single-phase series-excited motor-fans (hereinafter referred to as electric fans) for household vacuum cleaners. This standard applies to electric fans for dry household vacuum cleaners. JB/T 5887-1991 Single-phase series electric motor for household vacuum cleaners JB/T5887-1991 Standard download and decompression password: www.bzxz.net

Machinery Industry Standards of the People's Republic of China
Technical Conditions for Single-Phase Series Motor Fans for Household Vacuum Cleaners
1 Subject Content and Scope of Application
JB/T 5887--91||tt| |This standard specifies the technical requirements and test methods for single-phase series-excited motor-fan (hereinafter referred to as the fan) for household vacuum cleaners.
This standard applies to electric fans for dry household vacuum cleaners. Those not specified in this standard shall comply with the provisions of GB9926--88 "General Technical Conditions for Small Power Single-phase Series Motors" and GB12350-90 "Safety Requirements for Small Power Motors". 2 Reference standards
GB755
GB8128
GB 9926
GB 4706. 7
GB 2423.3
GB2828
GB12350
GB4343
GB2806
GB2807
GB8128
3 definitions
Basic technical requirements for rotating electrical machines
Single-phase series excitation Motor test methods
General technical conditions for small-power single-phase series motors Special requirements for safety of vacuum cleaners for household and similar electrical appliances and sampling table Safety requirements for small power motors
Measurement methods and allowable values ??of radio interference characteristics of power tools, household appliances and similar appliances Motor noise measurement method
Measurement method of motor vibration
Single Open the air suction port of the electric fan to the series motor test method
3.1 Standard measurement state
. There are no obstacles and drastic changes in airflow within 20cm around the electric fan. The working state at this time is Fan standard measurement status.
3.2 Standard test environmental conditions
Ambient temperature
Relative humidity
Air pressure
3.3 Rated operation
20±2℃|| tt||60%~70%
86~106kPa
when voltage. When the frequency is the rated value, the electric fan operates under standard measurement conditions and standard test environmental conditions. 3.4 No-load operation
Operation under standard test environmental conditions when the air suction inlet of the electric fan is fully closed. 3.5 Normal operation
The operation of the electric fan when the air suction port is spread out under normal temperature and normal pressure (atmospheric pressure) conditions. The Ministry of Machinery and Electronics Industry approved 22
1992-1001 implementation on 1991-10-24
3.6 rated input power
JB/T 5887--91
Under operating conditions, the nominal value of the input power. 3.7
Suction power
The energy of the air flow inhaled by the electric fan per unit time. 3.8 Efficiency
Under the rated voltage and rated frequency, the ratio of the suction power and the input power of the electric fan is expressed as a percentage. 4 Basic parameters of the electric fan
4.1 The rated voltage of the electric fan is 220V.
4.2 The rated frequency of the electric fan is 50Hz.
The capacity of the 4.3 electric fan is divided according to the rated input power, and its power level is: 110,160,220,270,430,540,640,760,860,1080W. 5. The appearance, installation dimensions and tolerances of the electric fan. The appearance, installation dimensions and tolerances of the electric fan shall be agreed between the manufacturer and the user and marked on the product drawing (see Figure 1). LA
Figure 1
6 Technical requirements
6.1 The rating of the electric fan is a continuous rating based on the continuous working system (S1). 6.2 The protection level of the electric fan is IP00.
6.3·The electric fan should be able to work normally under the following conditions. The altitude does not exceed 1000m;
a.
b. The maximum ambient air temperature does not exceed 40℃, and the average maximum relative air humidity in the wettest month of the operating location is 90%; at the same time, the average monthly minimum temperature in the month does not exceed 25℃: c.
6.4 When the power supply voltage rating is When the soil temperature changes within 10%, the electric fan should be able to operate normally. 6.5 When the power supply voltage is 85% of the rated value, the electric fan should be able to start normally. 6.6 Main technical properties of electric fans
The main technical performances of electric fans are shown in Table 1.
23
Rated input power
W
Maximum suction power
w
Maximum vacuum degree
kPa|| tt||Maximum air volume
m*/min
Maximum efficiency
%
110
15
4.9
0.7
160
25
6.3
0.9
20
JB/T 5887—91
Table 1| |tt||220
40
7.8
1.2
270
60
9.0
1.4||tt ||Note: The technical performance of electric fans less than 110W is specified in the specific product. 430
90
11.0
1.8
25
540
140
14.2
2.1| |tt||640
180
15.0
2.2
760
210
16.0
2.4||tt ||28
860
240
17.5
2.6
1080
280
18.6
3.0
6.7 When the items listed in Table 1 are guaranteed values, the tolerance of the guaranteed values ??should comply with the provisions of Table 2 under the specified operating status of the electric fan. Table 2
Name
Maximum vacuum degree
Maximum air volume
Input power
Weighing
Maximum suction power
Max Efficiency
Capacity
Difference
-10%
—10%
±45w
±15%
12 %
-15%
Said
Ming
Rated input power below 300W
Rated input power above 300W
of the electric fan The direction of rotation is clockwise facing the commutator end. If it is counterclockwise, it should be stated in the product manual. 6.8
6.9
sound.
6. 10
6.11
When the electric fan is running, the fastening screws should not be loose, the bearings should be smooth and light, without stagnation, and the sound should be uniform and harmonious without carrying harmful stray electricity. The surface of the fan should not have obvious wrinkles, cracks and rust, and should not be stained or bruised. Under rated operating conditions, the temperature rise limit of the fan winding and commutator should not exceed the requirements in Table 3. . Table 3
insulation
etc
name
name
armature winding and stator winding
commutator
E
Level
Resistance method
60
Resistance method
65
Level
B
Level
6.12 Under rated operating conditions, the temperature of the fan bearings when measured with a thermometer should not exceed the requirements in Table 4. Table 4
Sliding bearing temperature limit
Rolling bearing temperature limit
80
85
Thermometer method
70|| tt||The cold insulation resistance of the fan winding should not be less than 20MQ, and should not be less than 2.MQ under humid or hot conditions. 6.13
K
℃
6.14 Under no-load operation, the electric fan should be able to withstand an overspeed test of 1.1 times the rated voltage for 30 seconds without harmful deformation, and can 24| |tt|| Pass the subsequent withstand voltage test.
JB/T 5887—91
6.15 The winding of the electric fan should be able to withstand the voltage withstand test for 1 minute without flashover and breakdown. The frequency of the test voltage is 50 Hz, and the waveform is an actual sine wave. The test voltage (effective value) is 1500V. The withstand voltage test should not be repeated as much as possible. If a second test is required, the test voltage should be 80% of the above value. During the batch production inspection test, the test voltage is allowed to be replaced by 1800V for 1 second. , the test voltage is applied with a test rod.
6.16 Under 1.06 times the rated voltage and standard measurement conditions, the thermal leakage current between any pole of the fan terminal and the metal shell should not be greater than 0.75mA.
6.17 Under rated voltage, when the air suction inlet area of ??the electric fan increases from 25% to 100%, the commutation spark level is not greater than level 2 specified in GB755.
6.18 The creepage distance and electrical clearance between the live parts of the electric fan and the shell should not be less than those specified in Table 5. Table 5
Creepage distance
Electrical clearance
Between live parts of different polarities
Between live parts and touched metal parts
Different polarities Between live parts
Between live parts and touching metal parts
6.19 Under normal operating conditions, the measured A-weighted sound power level noise of the electric fan shall not exceed the requirements of Table 6. Table 6
rated input power
W
noise
sound
dB(A)
110.160.220.270||tt| |98
430.540, 640
104
6.20 Under normal operating conditions, the measured radial vibration of the electric fan shall not exceed the requirements in Table 7. Table 7
Rated input power
w
Vibration speed
mm/s
110.160.220.270
10
6.21 The electric fan should meet the following requirements after the damp heat test. 430, 540, 640
20
6.21.1 The insulation resistance of the fan winding to the chassis shall comply with the requirements of Article 6.13. 6.21.2 The withstand voltage test of the fan winding to the casing shall comply with the requirements of Article 6.15. 6.21.3 The brushes of the electric fan slide freely in the brush box without getting stuck. 6.21.4 There is no obvious rust on the surface of the fan casing. 6.22 The service life of a pair of brushes of the electric fan should be no less than 300 hours. 6.23 The electric fan should be able to withstand the durability test and should still be able to operate normally after the test. 6.24 The electric fan should be able to withstand the durability test specified in Article 7.6 and should still be able to operate normally after the test. 4
2.5
3
mm
760.860, 1080
106
760.860.1080
25||tt ||6.25 When the user makes a request to the manufacturer, the radio and television interference from the electric fan should comply with the requirements of GB4343. 6.26 The packaging box of the packaged electric fan should be able to withstand a drop test from a height of 60cm. After the test, the packaging box should not have major deformation or obvious damage, and then check that the electric fan can operate normally. 6.27 Areas not specified in this standard should comply with the provisions of GB12350. 25
7 Test methods
JB/T 5887-91
7.1 Test conditions If there are no other provisions, the test shall be conducted under standard test environmental conditions. If the test is conducted under non-standard test environment conditions, the influence of the test environment conditions should be considered.
7.2 Requirements for measuring instruments
The accuracy of electrical measuring instruments shall not be less than level 0.5 (factory test allows level 1.0). 7.21 [
The air volume and vacuum degree test device shall comply with the requirements of Appendix A. 7.22
The accuracy of the leakage current measuring instrument shall not be less than 5%. 7.23
7. 24
The measurement error of the vibration meter should be less than ±10%. The error of the thermometer is within 1℃.
7.25
7.3 The test methods for electric fan air volume and vacuum degree are in accordance with the provisions of Appendix A. 7.4 Test method for electric fan noise
7.4.1 The inclination angle between the axis of the electric fan and the horizontal shall not be greater than 5° when placed horizontally. 7.4.2 The electric fan shall be measured during regular operation at rated voltage and rated frequency. 7.4.3 Carry out the measurement according to the measurement position specified in Figure 2, take the average value of the noise at each measurement point, and express it in terms of A-weighted sound power level. 7.4.4 The areas not specified in this method shall comply with the provisions of GB2806. 2
2
Figure
2
26
7.5 Determination method of electric fan vibration
JB/T 5887—91|| tt||7.5.1 The electric fan is placed horizontally, and the inclination angle between its axis and the horizontal is not greater than 5°. 7.5.2 The electric fan shall be measured during normal operation at rated voltage and rated frequency. 7.5.3 Read the vibration speed value (mm/s) at the three points at the matching position of the fan blade casing and the end cover as shown in Figure 3 and take the maximum value. 7.5.4 The areas not specified in this method shall comply with the provisions of GB2807. Brush center line
Figure 3
7.6 Durability test of electric blower
The electric blower operates at 1.1 times the rated voltage for 48 hours under normal operating conditions. Then run at 0.9 times the rated voltage for 48 hours. The operation can be continuous or divided into several cycles, but each cycle should not be less than 8 hours. 7.7 Life test of the electric fan
7.7.1 Under the rated voltage and normal operating conditions, the electric fan runs for 14 minutes and 30 seconds and stops for 30 seconds as a working cycle. From the test to the end of its life, the cumulative working period is the life of the electric fan. 7.7.2 During the life test, the commutator and brushes are allowed to be cleaned every 100 hours of operation, and the auxiliary brushes are allowed to be replaced. 7.8 The life test of the brush can be carried out together with the life test of the electric fan. When the brush is worn to the point that it can no longer continue to work normally, the life of the brush is considered to have ended.
7.9 Determination of commutation spark level
When the voltage and frequency are at rated values, the electric fan runs for 3 minutes, and then covers 75% of the suction inlet with a hard board and runs for 1 minute. Cover 50% of the area and run for 1 minute. During the operation, observe the size of the commutation spark and judge based on the maximum spark. 7.10 The damp heat test of the electric fan is carried out according to the constant damp heat test method specified in GB2423.3Ca. The test temperature is 40°C ± 2°C and the relative humidity is 93±% and the period is 48 hours.
7.11 Packaging drop test
After the packaged electric fan, drop each side, three edges and one corner of the packaging box vertically downward from a height of 60cm to the flat cement floor. Once each time, the initial velocity should be ensured to be zero during the drop test. The test surface shall be parallel to the ground and shall comply with the provisions of Article 6.26 after the test. 7.12 For test items not specified in this chapter, the test methods shall comply with the provisions of GB8128. 8 Inspection rules
8.1 Test classification, testing is divided into four types: inspection test, acceptance test, type inspection and cycle test. 8.2 Inspection test and acceptance test
8.21 Inspection test and acceptance test shall be carried out according to the general inspection level I and one-time sampling plan specified in GB2828. The test items and qualified quality level AQL shall be as specified in Table 8.
27
Serial number
1
2
3
5
6
B|| tt||9
10
11
Nameplate main items
Surface quality inspection
Item
Outline installation dimensions and tolerance inspection| | tt | tt||Overspeed test
Inspection of commutation spark
Withstand voltage test between winding and casing
Determination of vibration
JB/T 5887--91| |tt||Table 8
Types of unqualification
Unqualified Category A
Unqualified Category C
Unqualified Category B
Unqualified Category A
Class B unqualified
AQL
1.5
2.5
Requirements regulations
9.2
6.10||tt ||5
6.5, 6.8, 6.9
6.6
6.6
6.13
6.14
6.17
6.15
6.20
Note: 1) During the inspection test, it is only allowed to measure the air volume and vacuum degree at one working point, indirectly ensuring the maximum air volume and maximum vacuum degree. Method regulations
7.12
7.3
7.12
Same as 6.14
7.9
7.12
7.5||tt| | Only AQI products that meet the requirements of Table 8 for Category B and Category C can leave the factory. Qualified products should be accompanied by a certificate of conformity. 8.22.2
8.23 The batches that fail the acceptance test will be returned to the manufacturer or the manufacturer will negotiate with the user to resolve the issue. 8.3 Type inspection
8. 3. 1 Type inspection is carried out under the following circumstances. When a new product is finalized,
b.
there are major changes in electromagnetic design, mechanical structure, and material technology that are enough to affect the performance of the product. 8.3.2 The number of prototypes for type inspection shall be no less than 3. 8.3.3 The test items of type inspection shall comply with the provisions of Table 9. 8.3.3.1 Category A unqualified items include the withstand voltage test between the winding and the chassis and the main items on the nameplate (wrong model and rating). 8.3.3.2 Except for all items in the inspection test, all other test items are Category B unqualified items, with a qualified quality level of AQL - 1.5 (see Table 9).
Table 9
Serial number
1
2
3
5
7
item| |tt||All inspection test items
Object
Inspection of creepage distance and electrical clearance
Maximum suction power
Maximum efficiency
Leakage current Determination
Temperature rise test
Durability test
Damp heat test
8
9
Lifetime test
10| |tt||Brush life test
Noise test
11
28
Requirements regulations
6.18
6.6||tt ||6.6
6.16
6.11
6.23
6.21
6.24
6.22
6.19
Methods and Regulations
Appendix A
Appendix A
7.12
7.12
7.6
7.10
7.7||tt ||7.8
7.4
Type test
V
V
(another two
prototypes are used)
Cycle test
V
V
V
serial number
item
12
radio and TV interference test
13 [Packaging, drop test
8.3.4 Type inspection result evaluation
JB/T 5887--91
Continued Table 9||tt ||Requirements regulations
6.25
6.26
Method regulations
6.25
7.11
Type test
Period Test
The judgment of type inspection is based on the provisions of GB2828. When the sample size of the electric fan is 3, as long as one electric fan fails any test, the type inspection fails. After the cause is identified and corresponding repair measures are taken, it can be resubmitted for type inspection.
8.4 Periodic test
8.4.1 Periodic test shall be carried out in the manufacturing unit at least once every two years. 8.4.2 The items of periodic testing shall comply with the provisions of Table 9. 8.4.3 The evaluation of the periodic test results is the same as that of Article 8.3.4. If the periodic test fails, the failure shall be notified to the relevant departments. After the cause is identified and repair measures shall be taken, the periodic test can be resubmitted. 9 Marking, packaging, transportation and storage
9.1 A nameplate should be attached to the motor casing, and the writing on the nameplate should be indelible during the entire period of use. 9.2 Items that should be marked on the nameplate include:
a.
Manufacturer name:
bi
Product name;
c.||tt| |Product model or mark,
Manufacturing date (or serial number) or production batch number, d.
e. The main parameters of the product: rated voltage, rated frequency, rated input power f.
insulation level.
9.3 The product is packed in cartons and should be reliably moisture-proof and vibration-proof. 9.4 The outer wall of the product packaging box should be clearly marked with the following signs: a.
b.
c.
d.
e.
f.| |tt||Manufacturer name:
Product model or mark;
Main parameters of the product: rated voltage, rated frequency, rated input power; gross weight;
Packing box size, | |tt||Quantity,
Packing date
g.
h.
Protective signs and transportation precautions should be marked outside the packaging box. 9.5 The product should have an instruction manual (at least one copy should be provided for the same user and electric fan of the same specification), and the product certificate should be supplied to the user along with the product.
9.6 When the life of the brush is less than 500h, the manufacturer should provide a pair of spare parts of the brush to the user along with the product. 9.7 There are no restrictions on the means of transportation of the product, but the electric fan must be protected from bumps, rain and chemical corrosion during transportation. 9.8 The product should be stored in an environment where the air temperature is: -5~40℃ and the relative humidity is not greater than 90%. In a clean and well-ventilated warehouse, the air must not contain corrosive gases.
9.9 The warranty seal and terms of the product can be agreed between the manufacturer and the user. 29
JB/T 5887—91
Appendix A
Measurement method of air volume and vacuum degree of electric fan (supplement)
A1 air volume and vacuum degree testing device should In compliance with the requirements of Figure A1 or Figure A2, the accuracy of the air volume and vacuum testing instruments shall not be less than 2%. Figure Al
1-U-shaped pipe
4--pipe joint
1--pressure gauge
2--tested electric fan
5-- Flowmeter
Figure A2
3—pressure equalizing box
6-valve
2-tested electric fan
5-air volume measuring instrument|| tt||4-hole plate and connector
3-one voltage equalizing box
During the A2 test, the electric fan is placed on the specified voltage equalizing box, and the size of the voltage equalizing box should comply with Figure A3 Regulation. 30
5 (see Table 9).
Table 9
Serial number
1
2
3
5
7
item| |tt||All inspection test items
Object
Inspection of creepage distance and electrical clearance
Maximum suction power
Maximum efficiency
Leakage current Determination
Temperature rise test
Durability test
Damp heat test
8
9
Lifetime test
10| |tt||Brush life test
Noise test
11
28
Requirements regulations
6.18
6.6||tt ||6.6
6.16
6.11
6.23
6.21
6.24
6.22
6.19
Methods and Regulations
Appendix A
Appendix A
7.12
7.12
7.6
7.10
7.7||tt ||7.8
7.4
Type test
V
V
(another two
prototypes are used)
Cycle test
V
V
V
serial number
item
12
radio and TV interference test
13 [Packaging, drop test
8.3.4 Type inspection result evaluation
JB/T 5887--91
Continued Table 9||tt ||Requirements regulations
6.25
6.26
Method regulations
6.25
7.11
Type test
Period Test
The judgment of type inspection is based on the provisions of GB2828. When the sample size of the electric fan is 3, as long as one electric fan fails any test, the type inspection fails. After the cause is identified and corresponding repair measures are taken, it can be resubmitted for type inspection.
8.4 Periodic test
8.4.1 Periodic test shall be carried out in the manufacturing unit at least once every two years. 8.4.2 The items of periodic testing shall comply with the provisions of Table 9. 8.4.3 The evaluation of the periodic test results is the same as that of Article 8.3.4. If the periodic test fails, the failure shall be notified to the relevant departments. After the cause is identified and repair measures shall be taken, the periodic test can be resubmitted. 9 Marking, packaging, transportation and storage
9.1 A nameplate should be attached to the motor casing, and the writing on the nameplate should be indelible during the entire period of use. 9.2 Items that should be marked on the nameplate include:
a.
Manufacturer name:
bi
Product name;
c.||tt| |Product model or mark,
Manufacturing date (or serial number) or production batch number, d.
e. The main parameters of the product: rated voltage, rated frequency, rated input power f.
insulation level.
9.3 The product is packed in cartons and should be reliably moisture-proof and vibration-proof. 9.4 The outer wall of the product packaging box should be clearly marked with the following signs: a.
b.
c.
d.
e.
f.| |tt||Manufacturer name:
Product model or mark;
Main parameters of the product: rated voltage, rated frequency, rated input power; gross weight;
Packing box size, | |tt||Quantity,
Packing date
g.
h.www.bzxz.net
Protective signs and transportation precautions should be marked outside the packaging box. 9.5 The product should have an instruction manual (at least one copy should be provided for the same user and electric fan of the same specification), and the product certificate should be supplied to the user along with the product.
9.6 When the life of the brush is less than 500h, the manufacturer should provide a pair of spare parts of the brush to the user along with the product. 9.7 There are no restrictions on the means of transportation of the product, but the electric fan must be protected from bumps, rain and chemical corrosion during transportation. 9.8 The product should be stored in an environment where the air temperature is: -5~40℃ and the relative humidity is not greater than 90%. In a clean and well-ventilated warehouse, the air must not contain corrosive gases.
9.9 The warranty seal and terms of the product can be agreed between the manufacturer and the user. 29
JB/T 5887—91
Appendix A
Measurement method of air volume and vacuum degree of electric fan (supplement)
A1 air volume and vacuum degree testing device should In compliance with the requirements of Figure A1 or Figure A2, the accuracy of the air volume and vacuum testing instruments shall not be less than 2%. Figure Al
1-U-shaped pipe
4--pipe joint
1--pressure gauge
2--tested electric fan
5-- Flowmeter
Figure A2
3—pressure equalizing box
6-valve
2-tested electric fan
5-air volume measuring instrument|| tt||4-hole plate and connector
3-one voltage equalizing box
During the A2 test, the electric fan is placed on the specified voltage equalizing box, and the size of the voltage equalizing box should comply with Figure A3 Regulation. 30
5 (see Table 9).
Table 9
Serial number
1
2
3
5
7
item| |tt||All inspection test items
Object
Inspection of creepage distance and electrical clearance
Maximum suction power
Maximum efficiency
Leakage current Determination
Temperature rise test
Durability test
Damp heat test
8
9
Lifetime test
10| |tt||Brush life test
Noise test
11
28
Requirements regulations
6.18
6.6||tt ||6.6
6.16
6.11
6.23
6.21
6.24
6.22
6.19
Methods and Regulations
Appendix A
Appendix A
7.12
7.12
7.6
7.10
7.7||tt ||7.8
7.4
Type test
V
V
(another two
prototypes are used)
Cycle test
V
V
V
serial number
item
12
radio and TV interference test
13 [Packaging, drop test
8.3.4 Type inspection result evaluation
JB/T 5887--91
Continued Table 9||tt ||Requirements regulations
6.25
6.26
Method regulations
6.25
7.11
Type test
Period Test
The judgment of type inspection is based on the provisions of GB2828. When the sample size of the electric fan is 3, as long as one electric fan fails any test, the type inspection fails. After the cause is identified and corresponding repair measures are taken, it can be resubmitted for type inspection.
8.4 Periodic test
8.4.1 Periodic test shall be carried out in the manufacturing unit at least once every two years. 8.4.2 The items of periodic testing shall comply with the provisions of Table 9. 8.4.3 The evaluation of the periodic test results is the same as that of Article 8.3.4. If the periodic test fails, the failure should be notified to the relevant departments. After the cause is identified and repair measures should be taken, the periodic test can be resubmitted. 9 Marking, packaging, transportation and storage
9.1 A nameplate should be attached to the motor casing, and the writing on the nameplate should be indelible during the entire period of use. 9.2 Items that should be marked on the nameplate include:
a.
Manufacturer name:
bi
Product name;
c.||tt| |Product model or mark,
Manufacturing date (or serial number) or production batch number, d.
e. The main parameters of the product: rated voltage, rated frequency, rated input power f.
insulation level.
9.3 The product is packed in cartons and should be reliably moisture-proof and vibration-proof. 9.4 The outer wall of the product packaging box should be clearly marked with the following signs: a.
b.
c.
d.
e.
f.| |tt||Manufacturer name:
Product model or mark;
Main parameters of the product: rated voltage, rated frequency, rated input power; gross weight;
Packing box size, | |tt||Quantity,
Packing date
g.
h.
Protective signs and transportation precautions should be marked outside the packaging box. 9.5 The product should have an instruction manual (at least one copy should be provided for the same user and electric fan of the same specification), and the product certificate should be supplied to the user along with the product.
9.6 When the life of the brush is less than 500h, the manufacturer should provide a pair of spare parts of the brush to the user along with the product. 9.7 There are no restrictions on the means of transportation of the product, but the electric fan must be protected from bumps, rain and chemical corrosion during transportation. 9.8 The product should be stored in an environment where the air temperature is: -5~40℃ and the relative humidity is not greater than 90%. In a clean and well-ventilated warehouse, the air must not contain corrosive gases.
9.9 The warranty seal and terms of the product can be agreed between the manufacturer and the user. 29
JB/T 5887—91
Appendix A
Measurement method of air volume and vacuum degree of electric fan (supplement)
A1 air volume and vacuum degree testing device should In compliance with the requirements of Figure A1 or Figure A2, the accuracy of the air volume and vacuum testing instruments shall not be less than 2%. Figure Al
1-U-shaped pipe
4--pipe joint
1--pressure gauge
2--tested electric fan
5-- Flowmeter
Figure A2
3—pressure equalizing box
6-valve
2-tested electric fan
5-air volume measuring instrument|| tt||4-hole plate and connector
3-one voltage equalizing box
During the A2 test, the electric fan is placed on the specified voltage equalizing box, and the size of the voltage equalizing box should comply with Figure A3 Regulation. 30

Manufacturer name:
Product model or mark;
Main parameters of the product: rated voltage, rated frequency, rated input power; gross weight;
Packing box size,
Quantity,
Packing date
g.
h.
Protective signs and transportation precautions should be marked outside the packaging box. 9.5 The product should have an instruction manual (at least one copy should be provided for the same user and electric fan of the same specification), and the product certificate should be supplied to the user along with the product.
9.6 When the life of the brush is less than 500h, the manufacturer should provide a pair of spare parts of the brush to the user along with the product. 9.7 There are no restrictions on the means of transportation of the product, but the electric fan must be protected from bumps, rain and chemical corrosion during transportation. 9.8 The product should be stored in an environment where the air temperature is: -5~40℃ and the relative humidity is not greater than 90%. In a clean and well-ventilated warehouse, the air must not contain corrosive gases.
9.9 The warranty seal and terms of the product can be agreed between the manufacturer and the user. 29
JB/T 5887—91
Appendix A
Measurement method of air volume and vacuum degree of electric fan (supplement)
A1 air volume and vacuum degree testing device should In compliance with the requirements of Figure A1 or Figure A2, the accuracy of the air volume and vacuum testing instruments shall not be less than 2%. Figure Al
1-U-shaped pipe
4--pipe joint
1--pressure gauge
2--tested electric fan
5-- Flowmeter
Figure A2
3—pressure equalizing box
6-valve
2-tested electric fan
5-air volume measuring instrument|| tt||4-hole plate and connector
3-one voltage equalizing box
During the A2 test, the electric fan is placed on the specified voltage equalizing box, and the size of the voltage equalizing box should comply with Figure A3 Regulation. 30

Manufacturer name:
Product model or mark;
Main parameters of the product: rated voltage, rated frequency, rated input power; gross weight;
Packing box size,
Quantity,
Packing date
g.
h.
Protection signs and transportation precautions should be marked on the outside of the packaging box. 9.5 The product should have an instruction manual (at least one copy should be provided for the same user and the same specification of electric fans), and the product certificate should be provided to the user along with the product.
9.6 When the life of the brush is less than 500h, the manufacturer should provide a pair of brush spare parts along with the product to the user. 9.7 There is no restriction on the means of transportation of the product, but the electric fan must be protected from damage, rain and chemical corrosion during transportation. 9.8 The product should be stored in an ambient air temperature of: -5~40℃, and a relative humidity of no more than 90%. In a clean, well-ventilated warehouse, the air should not contain corrosive gases.
9.9 The warranty stamp and clause of the product can be agreed upon by the manufacturer and the user. 29
JB/T 5887—91
Appendix A
Determination method of air volume and vacuum degree of electric fan (supplement)
A1 The air volume and vacuum degree test device shall comply with the provisions of Figure A1 or Figure A2, and the accuracy of the air volume and vacuum degree test instrument shall not be less than 2%. Figure A1
1-U-shaped pipe
4--Pipe joint
1-Pressure gauge
2-Tested electric fan
5-Flow meter
Figure A2
3-Equalizing pressure box
6-Valve
2-Tested electric fan
5-Air volume measuring instrument
4Orifice plate and connector
3-Equalizing pressure box
During the A2 test, the electric fan is placed on the specified equalizing pressure box, and the size of the equalizing pressure box should comply with the provisions of Figure A3. 30
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