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GB/T 22089-2008 English PDF (GBT22089-2008)

GB/T 22089-2008 English PDF (GBT22089-2008)

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GB/T 22089-2008: Performance requirements and measuring methods for electric kettles

This Standard specifies the performance requirements and test methods for household electric kettles and others with similar purposes. This Standard is applicable to electric kettles with a rated voltage not greater than 250 V AC and a rated capacity not greater than 2.5 L.
GB/T 22089-2008
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 97.040.01
Y 63
Performance Requirements and Measuring Methods
for Electric Kettles
ISSUED ON: JUNE 26, 2008
IMPLEMENTED ON: MAY 1, 2009
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the PEOPLE Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Test Conditions ... 6
5 Performance Requirements ... 6
6 Test Methods ... 8
Appendix A (normative) Main Performance Grading of Electric Kettles ... 11 Performance Requirements and Measuring Methods
for Electric Kettles
1 Scope
This Standard specifies the performance requirements and test methods for household electric kettles and others with similar purposes.
This Standard is applicable to electric kettles with a rated voltage not greater than 250 V AC and a rated capacity not greater than 2.5 L.
NOTE 1:
---Similar purposes refer to non-household applications, such as: inns, coffee shops, tea rooms, hotels and other occasions with equivalent purposes;
---It is inapplicable to the operating environment where flammable, explosive and corrosive gas, and conductive dust exist in the surrounding air;
---The performance requirements and test methods for electric kettles with a rated capacity above 2.5 L are still under consideration.
NOTE 2: this Standard only applies to electric kettles used below 800 m above sea level. 2 Normative References
Through the reference in this Standard, the clauses of the following documents become clauses of this Standard. In terms of references with a specified date, all the subsequent modification sheets (excluding the corrected content) or revised versions are not applicable to this Standard. However, the various parties that reach an agreement in accordance with this Standard are encouraged to explore the possibility of adopting the latest version of these documents. In terms of references without a specified date, the latest version is applicable to this Standard. The hygiene and environmental protection requirements of the products shall be implemented in accordance with the relevant national standards.
GB/T 2423.17 Environmental Testing for Electric and Electronic Products - Part 2: Test Method - Test Ka: Salt Mist (GB/T 2423.17-2008, IEC 60068-2-11:1981, IDT) GB 4706.1 Household and Similar Electrical Appliances - Safety - Part 1: General Requirements (GB 4706.1-2005, IEC 60335-1:2004(Ed 4.1), IDT)
GB 4706.19 Safety of Household and Similar Electrical Appliances - Particular Requirements for Appliances of Heating Liquids (GB 4706.19-2004, IEC 60335-2- 15:2000, IDT)
IEC 60530 Methods for Measuring the Performance of Electric Kettles and Cooking Vessels for Household and Similar Purposes
3 Terms and Definitions
The following terms and definitions are applicable to this Standard.
3.1 Electric Kettles
Electric kettles refer to portable electric heating appliances used to heat water to the boiling point and pour water through the water outlet, such as: electric kettles, electric cups, electric tea kettles and electric water pots.
3.2 Normal Operation
Normal operation means that the electric kettle is operating at the rated power, the container is filled with a rated capacity of water, and the lid is closed. 3.3 Rated Capacity
Rated capacity refers to the maximum capacity of the electric kettle specified by the manufacturer.
3.4 Boil Switch Off
Boil switch off refers to the function of electric kettle of automatically powering off after heating water to boiling.
3.5 Boiling Water
Boiling water refers to water heated to a boiling state.
3.6 Break Time
Break time refers to the time required from reaching the boiling water temperature to the automatic switch-off of the electric kettle under the specified test conditions. 3.7 Reset Time
Reset time refers to the shortest time required for the temperature control device to reset and re-energize after water-boiling and switch-off.
3.8 Thermal Efficiency
Thermal efficiency refers to the ratio of the amount of heat (Q) absorbed by 5.3.2 Boiling water break time
The temperature control device of the electric kettle shall switch off the power supply within the following time:
---25 s, when the rated power of the electric kettle is greater than 1,500 W; ---30 s, when the rated power of the electric kettle is less than, or equal to 1,500 W.
5.3.3 Reset time
The reset time of the temperature control device of the electric kettle shall be less than 60 s.
5.4 Lift-induced Power-off Function
In terms of electric kettles with a lift-induced power-off function, when the kettle body is lifted off the base and put back again, the heating circuit can still be in a disconnected condition.
When the kettle body is lifted off the base, it cannot lift the base together with it. 5.5 Water Outlet Performance
When the electric kettle normally pours water, water can only flow out smoothly from the water outlet.
5.6 Salt Mist Corrosion Resistance
The visible surfaces inside and outside the kettle body must be free of phenomena like spots, pinholes, bubbles, rust and corrosion marks, etc.
5.7 Thermal Efficiency
The thermal efficiency of the electric kettles shall be not less than 80%. The grading of thermal efficiency of the electric kettles shall comply with the stipulations of Appendix A.
5.8 Service Life
The service life shall be not less than 3,000 working cycles.
The grading of service life of the electric kettles shall comply with the stipulations of Appendix A.
6.5 Water Outlet Performance Test
Fill the electric kettle with the nominal maximum scale of water; close the lid. Vertically lift the electric kettle, so that the water outlet is 5 cm ?? 1 cm above the upper edge of the water-receiving container. Steadily tilt the kettle body, so that the water is poured out of the water outlet; tilt it to 90?? as quickly as possible.
Observe whether the water can only flow out smoothly from the water outlet, and whether there is a continuous flow of water along the sidewall of the electric kettle. The phenomenon of outflow of water droplets and intermittent water flow is allowed. Fill the electric kettle with half of the rated capacity of water, then, repeat the above- mentioned test.
6.6 Salt Mist Corrosion Resistance Test
In accordance with the requirements of GB/T 2423.17, conduct 24 h of salt mist test. The rust on sharp edges or the yellow rust film that can be wiped off may be neglected. 6.7 Thermal Efficiency Test
Through the following method, test the thermal efficiency of the electric kettle. Place the thermocouple 10 mm above the center of the inner bottom of the electric kettle (for electric kettles, in which, the electric heating element is immersed in water, place the thermocouple 10 mm above the highest end of the electric heating element); measure the water temperature. Weigh-take a rated capacity of water; weigh its mass (M), then, pour it all into the electric kettle; measure the initial water temperature as T1 (make the initial water temperature as consistent with the ambient temperature as possible). Supply power at the rated voltage; when the water temperature reaches 80 ??C (T2), immediately switch off the power; read the power consumption (E) of this process.
The calculation formula of thermal efficiency is as follows:
In which, ;
Where,
???---thermal efficiency;
C---specific heat of water, 4.187 ??? 103 J / (kg ??? K);

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