IEC 61121-2005 pdf – Tumble dryers for household use – Methods for measuring the performance
1 Scope This International Standard is applicable to household electric tumble dryers of the automatic and non-automatic type, with or without a cold water supply and incorporating a heating device. The object is to state and define the principal performance characteristics of household electric tumble dryers of interest to users and to describe standard methods for measuring these characteristics. This standard is concerned neither with safety nor with performance requirements. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60456, Clothes washing machines for household use – Methods for measuring the performance IEC 60734, Hard water to be used for testing the performance of some household electrical appliance IEC 61036, Alternating current static watt-hour meters for active energy (Classes 1 and 2) IEC 61591:1997, Household range hoods – Methods for measuring performance ISO 5167-1, Measurement of fluid flow by means of pressure differential devices – Part 1: Orifice plates, nozzles and Venturi tubes inserted in circular cross-section conduits running full 3 Definitions and symbols For the purposes of this standard, the following definitions apply. 3.1 tumble dryer appliance in which textile material is dried by tumbling in a rotating drum, through which heated air is passed 3.2 air vented tumble dryer tumble dryer with a fresh-air intake which is heated and passed over the textile material and where the resulting moist air is exhausted into the room or vented outside
4 Dimensions Height a 1 = vertical dimension measured from the lower edge (on the floor) to the upper edge of the top, with the door closed. If adjustable levelling feet are provided, they shall be moved up and down to determine minimum and maximum possible heights. Height a 2 = maximum vertical dimension measured from the lower edge (on the floor) to a horizontal plane at the maximum height of the tumble dryer with the door open. If adjustable levelling feet are provided, they shall be moved up and down to determine minimum and maximum possible heights. Width b = horizontal dimension, between the sides, as measured between two parallel vertical planes against the sides of the tumble dryer, including all projections. Depth c 1 = horizontal dimension as measured from a vertical rear plane against the tumble dryer and the most prominent part of the front, knobs and handles not being taken into account, with the door closed. Depth c 2 = horizontal dimension as measured from a vertical rear plane against the tumble dryer and the most prominent part of the front knobs and handles not being taken into account, with the door open. Drum volume = the volume of the drum in which textiles are placed, determined as the inside volume of the drum, in litres, after subtraction of ribs or other inward protrusions, etc.
6 General conditions for measurements 6.1 General The measurements shall be carried out on a tumble dryer installed and used in accordance with the manufacturer’s instructions, except as required by this standard. Where the tumble dryer is intended for use without a duct (i.e. the tumble dryer is intended to be vented into the room), the tumble dryer shall be tested as supplied without a duct. Where the tumble dryer is intended for use with a duct and the duct is supplied with the tumble dryer (i.e. not as a separate accessory), the tumble dryer is tested with this duct, placed in a configuration consisting of three right angle bends as in figure A.2, as far as possible. Where the tumble dryer is intended for use with a duct and the duct is not supplied with the tumble dryer, the tumble dryer shall be tested with a duct as specified in annex A. Where a manufacturer gives the option to use the tumble dryer both with and without a duct, the tumble dryer shall be tested without a duct. The test report shall clearly state which duct configuration, if any, is used in each test. 6.2 Resources and ambient conditions 6.2.1 Electricity supply The supply voltage shall be maintained at the rated voltage ±2 % throughout the test. If a voltage range is indicated, then the supply voltage shall be the nominal voltage of the country in which the tumble dryer is intended to be used. The supply frequency shall be maintained at the rated frequency ±1 % throughout the test. If a frequency range is indicated, the test frequency shall be the nominal frequency of the country in which the tumble dryer is intended to be used.