GB 4706.2-1996 Special requirements for safety electric irons for household and similar electrical appliances
Some standard content:
National Standard of the People's Republic of China
Safety of household and similar electrical appliances
Special requirements for electric irons
Safety of household and similar electrical appliancesparticular requirements for electric ironsGB 4706.2—1996
idtIEC335 -2-3:1986
Replaces GB4706.2-86
This standard is equivalent to IEC335-2-3 (3rd edition 1986) "Special safety requirements for electric irons for household and similar electrical appliances" Requirements" and its 1st Supplement (1989). This standard should be used in conjunction with GB4706.1-92 "General safety requirements for household and similar electrical appliances".
The part of this standard that says "applicable" means that the corresponding provisions in GB4706.1 are applicable to this standard; the parts of this standard that say "replace" or "modify\" should be replaced by the provisions of this standard The content shall prevail; the part marked "added" in this standard means that in addition to complying with the corresponding provisions of GB4706.1, it must also comply with the added provisions in this standard 1 Scope
GB4706.1. Chapter 1 is applicable except for the following. 1.1 This article is replaced by the following:
This standard applies to dry electric irons and wet (steam) electric irons for household and similar purposes. It is not intended for general household use. Electric irons, which may become a source of danger to people, such as those intended for use by laypeople in light industrial and agricultural workshops, also fall within the scope of this standard. This standard does not consider use in nurseries and other places where young children are present. or where there is a special risk of being left unattended by the elderly and infirm, in such cases additional requirements are necessary. This standard does not apply to:
a rotary ironing machine; ||tt| |a flat ironing machine;
an electric iron used in vehicles, cabins and aircraft; - an electric iron used in tropical countries:
- in places with special conditions, such as Electric buckets used in places where corrosive or explosive gases (dust, steam or gas) are present.
If the national health department, labor department and other relevant departments have stipulated additional requirements for such appliances, they should comply with these requirements. 2 Terminology
This chapter in GB4706.1 is applicable except for the following content. 2.2.29 This article is replaced by the following content:
Full heat release condition refers to the electric iron under the following conditions. Continuous operation. Temperature-controlled electric irons operate when the thermostat is adjusted to the highest temperature setting. Other types of electric irons maintain the midpoint surface temperature of the soleplate at 250°C ± 10°C by controlling the power switch. Irons should be placed by their stands when working. State Administration of Technical Supervision 1996-03-31 Issued 1997-01-01 Implementation
GB4706.2-1996
Steam electric irons will be filled with water. The container is operated empty. The following clauses are added to this chapter:
2.2.101 General purpose electric irons Electric irons commonly used in households
Travel irons are considered general purpose electric irons. 2.2.102 Thermostatic iron An electric iron equipped with a thermostat. The setting value of the thermostat can be manually adjusted to obtain the temperature control of the soleplate. Scope. 2.2.103 Dry iron dryiron
An electric iron that has neither means of generating and supplying steam nor spraying water on textiles. 2.2.104 Steam electric iron steamiron. , an electric iron having means for generating and supplying steam on textiles. 2.2.105 Spray-type electric iron sprayiron is an electric iron equipped with a means of spraying water mist on textiles. 2.2.106 soleplate
The part of the textile that is heated and pressed during ironing. 2.2.107 stand stand
A heel stand or similar device integrated with the iron; or an independent stand provided with the iron when delivered. 3 General requirements
This chapter in GB4706.1 is applicable.
4 General instructions in testing
This chapter in GB4706.1 is applicable except for the following content. 4.3 Replacement:
Except that the test of 21.101 for temperature-regulating electric irons is conducted before the test in Chapter 11, other tests are conducted in the order specified in GB4706.1.
Before the test begins, the iron should be operated at rated voltage to determine whether it is in good condition. 5 Ratings
This chapter in GB4706.1 is applicable.
6 categories
This chapter in GB4706.1 is applicable.
7 mark
This chapter in GB4706.1 is applicable except for the following content. 7.3 This article is replaced by the following:
The independent bracket delivered with the electric iron shall be marked with: - the name or trademark of the manufacturer;
the product model or type of the manufacturer.
7.12 The following content is added to this article:
There should be a warning in the instruction manual as follows: The user is not allowed to leave while the iron is powered on. The instructions for steam and spray electric irons should also contain the following warning: When filling the water tank, the power supply of the appliance must be unplugged from the socket. The instructions should also include instructions on other precautions that must be taken when using the iron. 8 Protection against electric shock
This chapter in GB4706.1 is applicable.
9 Start-up of electric appliances
This chapter in GB4706.1 is not applicable.
10 Input power and current
This chapter in GB4706.1 is applicable.
11 Fever
This chapter in GB4706.1 is applicable except for the following content. 11.2 This article is replaced by the following:
The test is carried out twice, once on the stand of the appliance and once on the three-point metal stand. The three-point metal stand is placed on the test corner base plate so that the electric iron The soleplate is in a horizontal position, and the height of the iron soleplate from the test corner soleplate where the three-point metal bracket is placed is not less than 100mm.
The test is conducted with the electric iron in still air and away from two right-angled side walls of the test angle. 11.8 This article adds the following content:
For the test on the three-point metal bracket, only the temperature rise of the internal and external wiring insulation is measured. This article amends the following content:
The temperature rise limit for rubber or polyvinyl chloride insulation for internal and external wiring is 50K, and the temperature rise limit for power cords without the T mark is 60K.
12 This chapter in GB4706.1 is applicable when appliances with electric heating elements are operated under overload conditions.
13 Electrical insulation and leakage current at operating temperature This chapter in GB4706.1 is applicable.
14 Suppression of radio and television interference
This chapter in GB4706.1 is applicable.
15 Waterproof
This chapter in GB4706.1 is applicable except for the following content. 15.3 This article is replaced by the following:
The structure of steam-type and spray-type electric irons should not cause splashed water and steam to affect the electrical insulation of the appliance. Check whether it is qualified through the following test. Place the electric iron in the water filling position specified by the manufacturer, fill the container with cold tap water, and then pour 100 mL of the same water evenly within 1 minute to allow the water to overflow. Then the electric iron should be able to withstand the requirements of Article 16.4 electrical strength test. Keep the iron in its original position for 10 minutes and then perform the electrical strength test specified in Article 16.4. Then, apply voltage to the electric iron under fully exothermic conditions but with water in the container to make it work at rated power for 1 minute. Immediately thereafter, conduct another electrical strength test specified in 16.4. GB4706.2—1996
Before undergoing the test of Article 15.4, the electric bucket should be placed in the laboratory environment for 24 hours. 6 Insulation resistance and electrical strength
16
This chapter in GB4706.1 is applicable.
17 Overload Protection
This chapter in GB4706.1 is not applicable.
18 Durability
This chapter in GB4706.1 is applicable except for the following content. 18.1 This article is modified as follows:
Modify the test method to:
Confirm whether it is qualified through the tests of other articles. Abnormal operation
19
This chapter in GB4706.1 is applicable except for the following content. 19.4 This article is replaced by the following:
The electric iron works under the conditions specified in Chapter 11, but the thermostat that controls the temperature limit during the test in Chapter 11 is short-circuited, and the test is only conducted on its bracket.
For steam-type and spray-type electric irons, whether the water tank is filled with water or not should be selected according to the most unfavorable situation. 19.11 The following content is added to this article:
The temperature rise of double insulation and reinforced insulation of electric irons with a thermostat that controls the temperature limit during the test in Chapter 11 does not need to be measured.
20 Stability and mechanical hazards
This chapter in GB4706.1 is applicable except for the following content. 20.1 This article is replaced by the following:
The electric iron should have sufficient stability.
Determine compliance through the following tests.
The electric bucket is placed through its bracket on a plane at an angle of 10° to the horizontal, and the flexible cord or cable is placed on this plane in the most unfavorable position. If the iron is tipped over in one or more positions, it shall be subjected to the tests of Chapter 11 in all overturned positions. The electric iron with an independent stand is placed on a plane at an angle of 15° to the horizontal plane through its stand, and then the stand is gently tapped to overcome the static friction between the iron and the stand. If the iron is on one or more It shall be tested in Chapter 11 in all positions after it has overturned or slipped away from the support. The temperature rise during the above tests shall not exceed the values ??specified in the table of 19.11. 21 Mechanical strength
This chapter in GB4706.1 is applicable except for the following content. 21.1 The following content is added to this article:
Whether it is qualified or not shall also pass the inspection of Article 21.101. The following provisions are added to this chapter:
21.101 An electric iron is suspended from a mechanical device by a handle. The device drops the electric iron in a free fall from a height of 40mm onto a rigid support steel plate with a thickness of not less than 15mm and a mass of at least 15kg at a frequency of no more than 20 times per minute. The test is conducted 1,000 times. | |tt | energy.
During the test, the electric iron should be powered on under sufficient heat dissipation conditions. After the test, the electric iron shall not show any damage not permitted by this standard. 22 Structure
This chapter in GB4706.1 is applicable except for the following content. 22.1 This clause is replaced by the following:
Electric irons shall be of Class 1, Class I or Class I construction. Determine whether it is qualified through relevant inspections. 22.12 The following content is added to this article:
The handle should be designed not to rotate, so that even if the fastener is loose, it will not rotate. 22.28 This paragraph is replaced by the following:
Steam or spray irons with a water tank which may not always be open to the atmosphere shall be equipped with an appropriate safety device to prevent the danger of excessive pressure.
Conformity shall be determined by inspection and the following tests. Close all holes in the container and increase the air pressure in the container until the safety device operates. The pressure at this time should not exceed 5N/cm (50kPa).
Then seal the outlet of the safety device, raise the pressure in the container to 10N/cm (100kPa) and maintain it at this value for 1min. During the test, the container should have no leakage. The following clauses are added to this chapter:
22.101 The electric bucket should be equipped with an accessory bracket or an integral bracket or an independent bracket. 22.102 Electric irons should be equipped with a thermostat or thermal circuit breaker to limit the soleplate temperature. If a thermal circuit breaker is used for overheating protection that meets the test requirements of 19.4, it shall be of the non-self-resetting type which cannot be reset by the user. Determine compliance with Articles 22.101 and 22.102 by inspection. 22.103 Steam and spray irons shall be constructed so that no water or steam will escape when the iron is connected to the power supply and the water tank is filled with water or when used in accordance with the manufacturer's instructions. Or burst out suddenly to avoid harm to the user. 22.104 Safety devices should be designed and arranged so that when activated, a sudden burst of steam or hot water will not cause harm to the user. Compliance with Articles 22.103 and 22.104 shall be determined through inspection during the test in Chapter 11. 23 Internal wiring
This chapter in GB4706.1 is applicable.
24 components
This chapter in GB4706.1 is applicable except for the following content. 24.1 The following content is added to this article:
The switch installed in the electric iron is not required to be a switch that operates frequently. 5 Power supply connection and external flexible cables and cords
25
This chapter in GB4706.1 is applicable except for the following content. 25.1 This article is replaced by the following:
Electric irons shall be provided with a power cord or appliance socket and no other form of power connection device is required. Compliance is determined by inspection.
25.6 This article amends the following content:
GB 4706.2—1996
The content about power cord specifications is replaced by the following content. The specifications and torsion resistance of the power cord should not be lower than the braided cord (IEC245 No. 51 wire). Polyvinyl chloride insulated flexible cords should not be used.
Tests on torsional resistance are under consideration.
25.10 This article amends the following content:
Replace the test method with the following content.
Check its compliance with the following test.
Install an electric iron including a cord and other components equipped with a cord protection device on a device with a swing mechanism as shown in Figure 101. When the swing mechanism is at the midpoint of its stroke, pass through the wire protector The axis of the flexible cord of the sleeve or cable inlet shall pass perpendicularly through the axis of the swing shaft. Tie a weight equal to the mass of the electric iron but not less than 2kg and not more than 6kg to the cord. The swing mechanism swings forward and backward in a 90° angle range (45° on both sides of the vertical direction) and bends 20,000 times at a rate of 60 times per minute. After bending 10,000 times, the sample is wound around the cord protection device. After the test is completed, the center line is turned 90°, and the soft wire protection device should not be loose. In addition to allowing the broken wire rate of each soft stranded wire to not exceed 10% of the total number of stranded wires, regardless of the soft wire protection device or the soft cable or soft wire There should be no damage within the scope of this standard. A bend is a movement of the cord either forward or backward. 26 External conductor terminal blocks
This chapter in GB4706.1 is applicable.
27 Grounding Measures
This chapter in GB4706.1 is applicable.
28 Screws and Wiring
This chapter in GB4706.1 is applicable.
29 This chapter in GB4706.1 for creepage distances, electrical clearances and penetration insulation distances, except for the following content, is applicable. 29.3 does not apply.
30 Heat resistance, flame resistance and tracking resistance
This chapter in GB4706.1 is applicable except for the following content. 30.1 This article amends the following:
Replace the paragraph on thermoplastic materials used for reinforced insulation and double insulation by the following. For electric irons without a thermostat used to limit the temperature during the test in Chapter 11, the test temperature for thermoplastic materials used for reinforced insulation and double insulation is 75°C ± 2°C or 25°C ± 2°C ( 25K±2K) plus the relevant maximum temperature rise measured during the test in Chapter 19, choose the higher one.
31 Anti-rust
This chapter in GB4706.1 is applicable.
32 Radiation, toxicity and similar hazards
This chapter in GB4706.1 is applicable.
Support
Swing axis
GB4706.2-1996
5445
300
Z
Heavy objects
Figure 101
Bending test device
Sample
GB4706.2-1996
Appendix
Inclusion
GB4706.The appendices in 1 apply except for the following. Appendix A
Thermal controller and overload release
(Supplement)
A3 This article modifies the following content:
Replace the thermostat with the following content Number of working cycles The number of working cycles of the thermostat is 25,000 cycles. This standard adds the following appendices:
Appendix AA
Alternative test methods for temperature-adjustable electric irons
(reference)
Alternatives for AA1 temperature-adjustable electric irons The test consists of test procedures in Chapters 10 to 21. Input power and current
Determination of electric iron sole plate temperature and mechanical strength according to the method specified in Chapter 11
Heat generation (including sole plate temperature)
Electrical insulation and leakage current at operating temperature Radio and Suppression of TV interference
Continuous operation test
Heat generation (repeat)www.bzxz.net
Electrical strength test
Waterproof operation of appliances with electric heating elements under overload conditions||tt| |Leakage current, insulation resistance and electrical strength continuous working tests are carried out in accordance with the provisions of AA2AA6. Chapter 10
Chapter 21
Chapter 11
Chapter 13
Chapter 14
Chapter 11
Chapter 16.4 Article
Chapter 12
Chapter 15
Chapter 16
AA2 electric iron works for 200h under the voltage condition of 1.15 times the rated input power, or equivalent The time required for the thermostat to complete 25,000 cycles, whichever is shorter. Unless otherwise specified, user-adjustable thermostats should be set to the highest temperature setting.
AA3
An electric iron without a steam generating device, supported by a bracket to keep the soleplate in a horizontal state. During the test, the iron is allowed to cool to near room temperature at least 10 times, but the cooling time is not included in the 200 hours of working time. AA4 steam and spray irons are supported in the air by a stand to allow the steam spray to pass freely. The bottom plate is level. The test procedure is to use steam or water spray for 8 hours, dry heating for 8 hours, and cooling for 8 hours. The cooling time is not included in the 200 hours of working time. During dry heating, the thermostat adjusted by the user should be set to the highest temperature setting. During steam injection, the thermostat for user adjustment should be set at the position specified by the manufacturer or at the middle position of the steam injection range.
During steam or water spraying, unless the manufacturer's instructions specify the use of distilled water or non-mineral water, the water used should comply with AA6 regulations.
GB4706.2—1996
During the test, there should be no electrical or mechanical failure in the iron or thermostat, and the contacts should not be excessively ablated, dented or welded. AA5
After the test in Chapter 21 and the continuous test, the average value of the soleplate temperature measured on the electric iron shall not be greater than 315℃ or the maximum temperature shall not be greater than 350℃. After the test in Chapter 21, the electric iron The upper and lower deviation of the base plate temperature fluctuation range should not exceed 10°C or 20°C. AA6 test water (similar to mineral water), its chemical composition should be within the following limits. Total hardness
Temporary hardness Calcium carbonate
Calcium sulphate
Calcium chloride
Magnesium carbonate ( magnesiumcarbonate) magnesium sulfate (magnesiumsulphate)
magnesium chloride (magnesiumchloride)
sodium sulfate (sodium suiphate)
sodium chloride (sodiumchloride)
sodium nitrate (sodiumnitrate)|| tt||Silica (silica)
Additional notes:
This standard is proposed by China Light Industry Federation.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Household Electrical Appliances. This standard is drafted by the China Household Electrical Appliances Research Institute. 250~300×10-6
150~250×10-6
150~250×10-6
10~50×10-6
Maximum 20 ×10-6
Maximum 100×10-6
Maximum 50×10-6
Maximum 20×10-6
Maximum 20×10-6|| tt||Maximum 50×10-6
Maximum 50×10-6
10~15×10-6
The main drafters of this standard: Zhang Yachen, Zhong Guoyi, Wang Zhiming, Liu Xianchun , Li Zhen, Xu Guanghui,Its chemical composition should be within the following limits. Total hardness
Temporary hardness Calcium carbonate
Calcium sulphate
Calcium chloride
Magnesium carbonate ( magnesiumcarbonate) magnesium sulfate (magnesiumsulphate)
magnesium chloride (magnesiumchloride)
sodium sulfate (sodium suiphate)
sodium chloride (sodiumchloride)
sodium nitrate (sodiumnitrate)|| tt||Silica (silica)
Additional notes:
This standard is proposed by China Light Industry Federation.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Household Electrical Appliances. This standard is drafted by the China Household Electrical Appliances Research Institute. 250~300×10-6
150~250×10-6
150~250×10-6
10~50×10-6
Maximum 20 ×10-6
Maximum 100×10-6
Maximum 50×10-6
Maximum 20×10-6
Maximum 20×10-6|| tt||Maximum 50×10-6
Maximum 50×10-6
10~15×10-6
The main drafters of this standard: Zhang Yachen, Zhong Guoyi, Wang Zhiming, Liu Xianchun , Li Zhen, Xu Guanghui,Its chemical composition should be within the following limits. Total hardness
Temporary hardness Calcium carbonate
Calcium sulphate
Calcium chloride
Magnesium carbonate ( magnesiumcarbonate) magnesium sulfate (magnesiumsulphate)
magnesium chloride (magnesiumchloride)
sodium sulfate (sodium suiphate)
sodium chloride (sodiumchloride)
sodium nitrate (sodiumnitrate)|| tt||Silica (silica)
Additional notes:
This standard is proposed by China Light Industry Federation.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Household Electrical Appliances. This standard is drafted by the China Household Electrical Appliances Research Institute. 250~300×10-6
150~250×10-6
150~250×10-6
10~50×10-6
Maximum 20 ×10-6
Maximum 100×10-6
Maximum 50×10-6
Maximum 20×10-6
Maximum 20×10-6|| tt||Maximum 50×10-6
Maximum 50×10-6
10~15×10-6
The main drafters of this standard: Zhang Yachen, Zhong Guoyi, Wang Zhiming, Liu Xianchun , Li Zhen, Xu Guanghui,
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