GB 4706.6-1995 Particular requirements for safety of automatic rice cookers 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
Particular requirements for automatic rice cookers
Safety of household and similar electrical appliancesParticular requirements for automatic rice cookersGB 4706.6—1995
Generation Gk 1706. 6 - 86
This standard is a special requirement formulated based on the characteristics of electric rice cookers, referred to as "Particular requirements for automatic rice cookers". This standard should be used in conjunction with GB470G.1-92 General safety requirements for household and similar electrical appliances. The parts of this standard marked with "applicable" indicate that the corresponding provisions in GB 4706.1-92 are applicable to this standard; the parts of this standard marked with "replaced" are subject to the provisions of this standard: the parts of this standard marked with "added" indicate that in addition to complying with the corresponding provisions in GB4706.1-92, the provisions added in this standard must also be complied with. 1 Scope
This chapter in GB4706.1--92 is applicable except for the following contents. 1.1 This clause is replaced by the following contents:
This standard applies to automatic heat preservation or timed electric rice cookers (hereinafter referred to as electric rice cookers) heated by electric heating elements. This standard does not apply to electric rice cookers used under special conditions where corrosive and explosive media (such as dust, flammable gases, etc.) exist. 2 Terminology
This chapter in GB4706.1--92 is applicable except for the following contents. 2. 2. 10.2. 2. 16, 2. 2. 17, 2. 2. 25--2.2, 28 These seven clauses are applicable. 2.2.29 This item is replaced by the following:
Sufficient heat discharge condition condition atlequale heat discharge According to the instructions of the rice cooker manufacturer, the inner pot is filled with 15% rated capacity of cold water and the temperature limiter is operated.
2.2.2.32~2.2.46 These four items are not applicable. 3 General requirements
This chapter in GB 4706.1-92 is applicable. 4 General instructions for testing
This chapter in GB4706.1-92 is applicable except for the following: 4.5 This item is replaced by the following:
Considering that the test results will be affected by the ambient air temperature, the temperature of the test room should be maintained at 2015℃. 4.8, 4.10.4.13 These three items are not applicable. Approved by the State Administration of Technical Supervision on July 6, 1995
Implementation on August 1, 1996
5 Rated values
GB 4706.6--1995
This clause in GB4706.1-92 is replaced by the following: The rated voltage of the electric rice cooker is single-phase AC 220 V. Compliance is determined by visual inspection of the mark. 6 Classification
This clause in GB 4706.1-92 is applicable except for the following. 6.1This clause is replaced by the following:
(1) Classification according to protection against electric shock:
a. Class 1 appliances,
b. Class 2 appliances,
c. Class 3 appliances.
(2) Classification by degree of waterproof protection:
For ordinary appliances,
7 marking
This chapter in GB 4706.1-92 is applicable except for the following contents. 7.1 The "
for electric appliances, the rated current (A) of the appropriate fuse" and "- rated working time or rated working time/rated intermittent time (h, min or s)" in this clause are not applicable. The following content is added to this clause:
For electric rice cookers with connectors for thermostats, it should be noted in the instructions that the electric rice cooker is equipped with corresponding connectors and matching sockets.
7.2, 7.3, 7.8 and 7.9 are not applicable. 7.10
This case replaces it with the following content:
The different positions of the regulator and switch of the electric rice cooker should be indicated by numbers, letters or other intuitive signs. If numbers are used to indicate different gears, the "off" gear must be indicated by *0. The gear with larger input power should be indicated by larger numbers.
7.14 This clause is replaced by the following:
The marking shall be clear and durable. It shall be marked in a prominent position, but not on a detachable part. Compliance shall be determined by visual inspection and wiping the marking with a cloth dampened with water for 15 seconds. Then wiping with a cloth soaked in gasoline for 15 seconds. After passing all the tests of this standard, the marking shall still be clear and distinct, the sign shall not be easily removed, and curling is not allowed. 8 Protection against electric shock
This chapter in GB4706.1-92 is applicable except for the above contents. 8.2 and 8.3 This clause is not applicable.
9 Starting of electric appliances
This chapter in GB 4706.1-92 is not applicable. 10 Input power and current
10.1 This clause is added with the following content:
GB 4706.6-1995
The rated input power is the sum of the rated input powers of all the individual components in the appliance that can be switched on at any time. If the components have several combinations, the rated input power shall be determined based on the combination that produces the maximum power. 10.2 This clause is not applicable.
11 Heating
This chapter in GB 4706.1-92 is applicable except for the following content. 11.2 This clause is replaced by the following content:
The rice cooker is placed in the test corner. The test corner consists of two walls at right angles to each other and a bottom plate. It is made of 20mm thick plywood painted with matte black paint. During the test, the rice cooker should be placed on the bottom plate as close to the walls as possible. 11.3 This clause is replaced by the following content:
The temperature rise of the rice cooker is measured by a fine-wire thermocouple. The selected thermocouple and its placement should minimize the impact on the test component. The thermocouple used to measure the temperature rise of the side wall and bottom plate of the test corner should be embedded in its surface or pasted on the back of a small black-coated disc made of steel or brass. The small disc has a diameter of 15mm and a thickness of 1mm. It should be placed flush with the surface of the board wall. 11.5 and 11.6 are not applicable. 11.7 This item is replaced by the following: The electric rice cooker is operated continuously under sufficient heat release conditions until a stable state is reached. 11.8 This item is replaced by the following: During the test, the thermal fuse does not operate. The temperature rise is continuously monitored. After the working cycle is over, the temperature rise of each part is recorded immediately. The value should not exceed the provisions of the table! If there are materials such as sealing fillers, they should not flow out. Table 1 Test corners, bottom plates Pins of appliance sockets Handles, switches, knobs, etc.: Metal Made of ceramic or glass Made of molded materials, rubber or wood 11.10 This item is not applicable.
12 Appliances with electric heating elements operating at overload conditions
This chapter in GB47U6.1-92 is applicable except for the following.
Thermocouple
Thermocouple
Thermocouple
Thermocouple
12.2 This clause is replaced by the following internal code:
The electric rice cooker is subjected to 15 cycles under full heat release conditions. Each cycle includes the normal working time specified in Article 11.7 and a cooling time sufficient for the electric rice cooker to cool to near room temperature. During the entire working period, all electric heating elements that can work simultaneously should be connected to the circuit, and their power supply voltage should be adjusted to make the input power equal to 1.27 times the rated input power or 1.21 times the rated input power plus 12W, whichever is greater. In order to shorten the cooling time, forced cooling can be used. After the test, the electric rice cooker shall not have any damage not allowed by this standard, and the internal wiring and general assembly shall not be deformed to the extent that the creepage distance and electrical clearance are reduced to below the specified values in Article 29.1. The joints and connectors shall not be loose. 12.3 This article is not applicable.
GB 4706. 6-- 1995
13 Electrical insulation and leakage current at working temperature This chapter in GB4706.1--92 is applicable except for the following. 13.1 This article is replaced by the following content
At working temperature, the electric rice cooker shall have good electrical insulation performance. The leakage current in normal use shall not be too large. Compliance is determined by the tests specified in Articles 13.2 and 13.3. During the test, the power supply voltage is adjusted to make its input power equal to 1-15 times the maximum rated power density. 13.2 This article is replaced by the following content:
The electric rice cooker shall be in accordance with 11.During the working time specified in Article 7, the leakage current shall not exceed the following values when measured before the temperature limiter cuts off the circuit: Between any pole of the power supply and easily accessible metal parts or metal boxes: Class I appliances - 0.75 mA: Class II appliances - 0.25 mA. Class II appliances - 0.5 mA. 14 Suppression of radio and television interference This chapter in GB 4706.1-92 is applicable. 15 Waterproofing This chapter in GB470G.1-92 is applicable except for the following contents. 15.1.15.2 This two articles are not applicable. 15.3 This article adds the following content: Electric rice cookers with reliable anti-overflow protection are not subject to this limitation. 16
Insulation resistance and electrical strength
This chapter in GB4706.1-92 is applicable except for the following contents. 16.2 This clause is replaced by the following contents:
The leakage current shall be tested at the locations specified in the first and second items of the table in clause 16.4. For class 1 appliances, the test voltage is applied between live parts and metal parts separated from live parts by basic insulation only. The test voltage is 1.06 times the rated voltage. The leakage current is measured within 55 seconds after the application of the test voltage. The leakage current shall not exceed the following values:
Class 1 appliances - 0.75 mA;
Class II appliances - 0.25 mA,
Class I appliances - 0.5 mA,
1G.3 This clause is not applicable.
17 Overload protection
This chapter in GB4706.1-92 is applicable. 18 Durability
This chapter in GB4706.1-92 is applicable except for the following contents. 18.1 This clause is replaced by the following contents
The structural design of the rice cooker should take into account: no electrical or mechanical failure that may impair compliance with the requirements of this standard will occur in normal use, the insulation GB4706.61995
should not be damaged, and the contacts and connections will not loosen due to heat and vibration. In addition, the thermal circuit breaker should not operate under normal working conditions. 18.2 This clause is replaced by the following contents:
Put the rice cooker on a horizontal support away from the wall, add 80% of the rated capacity of water into the pot, apply 1.1 times the rated voltage, and test according to the working time specified in 11.7 of this standard. The cumulative time of good operation should reach 48h (including the working time required for the tests in Chapters 11 and 13). 18.3 to 18.5 are not applicable.
18.6 This clause is replaced by the following:
After the test in 18.2, the rice cooker shall also be subjected to the test specified in Chapter 16. The connector, handle and other accessories or components shall not be loose. There shall be no damage that endangers safety during normal use. 19 Abnormal operation
This clause of GB 4706.1-92 is applicable except for the following. 19.1 This clause is replaced by the following
The rice cooker shall be designed to avoid fire, mechanical failure or electric shock accidents that endanger safety due to abnormal operation or misoperation. Test according to 19.3 and then test according to 19.4. In any test, if the thermal fuse or thermal disconnector operates, the heating element is damaged, or the current is interrupted for other reasons before reaching a stable state, the heating period can be considered to be over. However, if the interruption is caused by the damage of the heating element or a weak link, the test should be repeated on the second sample and should meet the conditions specified in Article 19.1. 19.2 This article is not applicable.
19.3 This article is replaced by the following content:
The rice cooker is tested in accordance with Article 11.7 of this standard, and the output power is adjusted to an input power equal to 1.24 times the rated input power. 19.4: This article is replaced by the following content
Repeat the test specified in Article 19.3, and short-circuit any controller used to limit the temperature in turn. 19.6~19.10 These five systems are not applicable
19.11 This article is applicable except for the following content. The penultimate paragraph of this clause "for the electric strength test in conductive liquid during normal use" is not applicable. 20 Stability and Mechanical Hazards
This chapter in GB 4706.1-92 is applicable except for the following content. 20.1 This clause is replaced by the following content:
The rice cooker should have sufficient stability.
Compliance is checked by the following test. Place the rice cooker on an inclined plane at an angle of 15° to the horizontal plane in the normal use state, and place its power cord on the same inclined plane in the most unfavorable position. Pour liquid into the pot until it does not overflow. During the test, the rice cooker should not overturn.
If the rice cooker overturns in one or more positions, it is required to carry out the test of Chapter 11 on all these overturning positions. During the test, the temperature rise shall not exceed the specified value in Table 9 of Clause 19.11. 202 This clause is not applicable.
21. Mechanical strength
This chapter in GB 4706.1-92 is applicable except for the following contents. 21.2 ~ 21.4 These three clauses are not applicable. The following clauses are added to this chapter:
GB4706.6-1995
21.101 Electric rice cookers shall be subjected to a drop impact test (except for those with a mass exceeding 4kg), as shown in Figure 1. On a flat concrete floor, a dry pine board of about 1.5m×1.5m in size and 30mm in thickness is placed flat, and the center of the board is aligned so that the bottom of the pot is parallel to the board surface. The pot body is dropped once from a height of 700mm after the rope is cut. Note: ① The test is carried out without power.
② Accessories that can be removed without tools should be removed; ③ No rice and water are added during the test, and the pot cover is closed. Sound break
Qualification is determined by the following tests. Figure 1
Live parts shall not be exposed:
Note: When the test finger is used for intense testing, the external form of the live parts cannot be melted by the test finger. h It shall not be short-circuited when the power is on.
The leakage current shall not exceed the provisions of Article 16.2. 22 Structure
This chapter in GB 4706.1--92 is applicable except for the following contents. 22.1 This article is replaced by the following content:
The rice cooker shall have a Class 1, Class I or Class 1 protection against electric shock. 22.9 This article is not applicable.
22.11 This article adds the following content:
The structure of the rice cooker shall be such that condensation or leakage of water will not affect the electrical insulation. A device may also be designed to collect the overflowing water. 22.17, 22.31, 22.32, 22.34 These four articles are not applicable. wear
This chapter adds the following clauses:
22.101 Parts that may be dangerous due to temperature rise should be equipped with thermal fuses or thermal circuit breakers, which should not operate in normal use.
The thermal fuse and its installation should comply with the following provisions: The material of the thermal fuse should not be easy to deteriorate:
After melting, the circuit should be completely cut off;
When melting, it should not be short-circuited due to arc, and it should not be grounded; d. It should be easy to maintain and replace;
GB 4706.61995
e. The distance between the exposed thermal fuse and the pot body should be more than 4mm, f. The thermal fuse should be marked with the rated operating current and operating temperature, and the following tests should be passed to check whether it is qualified. Place the thermal fuse horizontally in a constant temperature box and increase the temperature by 1° per minute until the thermal fuse melts. Use a thermometer to measure the air temperature near it. It should meet the requirements of GB$816-88 thermal fuses. The thermal circuit breaker is identified by observation and manual test: 22.102 If the overflow is controlled by semiconductors or other components, when it loses its control ability, the components connected to the control circuit should not burn. 23 Internal wiring
This clause in GB 4706-1-92 is applicable except for the following content. 23.4 is replaced by the following content:
In normal use or when the user is repairing the rice cooker, the connecting wires between different parts that can move relative to each other (including the connecting wires that provide grounding continuity) should not be subjected to excessive tension. 23.7 This clause is not applicable.
24 Components
This clause in GB4706.1-92 is applicable except for the following content. 24.1 This clause is replaced by the following:
The components on the rice cooker shall comply with the safety requirements of the corresponding product standards of the components. If the components do not have relevant standards, or are not marked, or the components are not used in accordance with the marks, such components shall be tested according to the conditions in the appliance, and the number of test samples shall generally be in accordance with the requirements of the corresponding standards. 24.8~24.11 These four clauses are not applicable.
25 Power supply connection and external flexible cables and cords
This chapter in GB 4706.1-92 is applicable except for the following contents. 25.1 This item is replaced by the following:
The electric rice cooker has an appliance outlet or a power cord with a reel. 25.4 This item is replaced by the following:
The power cord is connected to the socket of the electric rice cooker body by a connector. A power cord with a hand-wound or automatic reel may also be used. The outer shell of the electric rice connector shall not be made of gold screen material. Compliance is determined by the following test: If a connector is used, it should not be pulled out when a force of 5N is applied to the connector part, but this limit does not apply to those that will not cause danger after being pulled when a force of 2N to 5N is applied.
If an appliance with an automatic reel is used, the test shall be carried out in accordance with the relevant regulations of 22.14. 25.6. This item is replaced by the following:
The power cord should be made of fiber braided or rubber insulated sheath, and a copper core soft wire with similar performance, and its effective length shall not be less than 1.8m; for electric rice cookers with automatic reels, the effective length of the power cord shall not be less than 1.4m. Note: (① In normal use, when the heat resistance requirement is exceeded, necessary heat protection should be taken. ② For parts that may be touched with a temperature exceeding 100°C, polyvinyl chloride soft wires, ethylene oxide sheathed soft wires and chlorine-resistant sheathed cables should not be used. For Class 1 appliances, the power supply soft wire should have a green/yellow two-color wire, which can only be connected to the grounding terminal and cannot be connected to other terminals. The nominal cross-sectional area of the power cord should not be less than that listed in Table 2: Rated current
Nominal cross-sectional area
Compliance is determined by visual inspection and measurement. 25.7, 25.11~25.14 These five items are not applicable. 26 Terminals for external conductors
GB 4706.6-1995
This chapter in GB 4706.1-92 shall not be used retroactively. 27 Grounding measures
GB 4706.1-92 This chapter in GB 4706.1-92 is applicable. 28 Screws and connections
This chapter in GB 4706.1-92 is applicable. 29 Creepage distance, electrical tunnel and through insulation distance This chapter in GB 4706.1-92 is applicable except for the following contents. 0. 75
29.1 Except for paragraphs 2 to 5 of this clause, which are not applicable if the point where the winding and capacitor are connected and only basic insulation is used, another measurement is carried out after the belt is removed, the rest of this clause is applicable. 30 Heat resistance, flame resistance and sliding resistance to electric tracking
This chapter in GB4706.1-92 is applicable except for the following contents. 30.5 This clause is replaced by the following contents:
The insulation of the rice cooker shall meet the requirements of no-cause electric tracking when working under normal conditions. 31 Rust prevention
GB 4706. 1-92 32 Radiation, toxicity and similar hazards
This chapter in GB4706.1-92 is replaced by the following: The appliance shall not emit harmful radiation or carry toxic or similar hazards. Whether it is qualified shall be inspected in accordance with the relevant regulations of the national health and environmental protection departments. GB 4706.6—1995wwW.bzxz.Net
Appendix A
GB4706-1—92 Safety of electrical appliances for household and similar purposes
Use of the appendices in this standard (supplementary parts)
A1 Appendix A Thermal controllers and overload releases are applicable. A2 Appendix B Electronic circuits are applicable.
A3 Appendix C Structure of safety isolating transformers is applicable. Appendix D Requirements for the selection of motor protection devices are not applicable. A4
Appendix E Measurement of creepage distances and electrical noises is applicable. A5
Appendix F Motors that are not isolated from the power supply and whose basic insulation is not designed for the rated voltage of the appliance are not applicable. A6
A7 Appendix G Circuits for measuring leakage current are applicable. A8 Appendix H30 Selection and procedure for tests are applicable. A9 Appendix J "Flammation test" is applicable.
A10 Appendix K "Glow wire test" is applicable.
A11 Appendix L "Bad contact test for heating element" is applicable. A12
Appendix M "Needle flame test" is applicable.
A13 Appendix N "Resistance to tracking test" is not applicable. A14 Appendix 0 "Severity of work of insulating materials in terms of tracking hazard" is not applicable. Additional remarks:
This standard was proposed by China Light Industry General Association.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Household Electrical Appliances. This standard was drafted by Guangzhou Household Electrical Appliances Research Institute, with participation from Beijing Household Electrical Appliances Research Institute. The main drafters of this standard are Jin Dongchu and Zhang Yazhan.
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