IEC 61121 pdf download

IEC 61121 pdf download Tumble dryers for household use – Methods for measuring the performance
1 Scope
This International Standard is applicable to household electric tumble dryers of the automaticand 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 electrictumble dryers of interest to users and to describe standard methods for measuring thesecharacteristics.
This standard is concerned neither with safety nor with performance requirements.
2Normative references
The following referenced documents are indispensable for the application of this document.Fordated references,only the edition cited applies.For undated references, the latest edition ofthe referenced document (including any amendments) applies.
IEC 60456，Clothes washing machines for household use – Methods for measuring theperformance
IEC 60734，Hard water to be used for testing the performance of some household electricalappliance
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 heatedair is passed
3.2
air vented tumble dryer
tumble dryer with a fresh-air intake which is heated and passed over the textile material andwhere the resulting moist air is exhausted into the room or vented outside
3.3
condenser tumble dryer
tumble dryer in which the air used for the drying process is dehumidified by cooling
NOTE Combinations of the above-mentioned types are possible.
3.4
automatic tumble dryer
tumble dryer which switches off the drying process when a certain moisture content of the load is reached
NOTE This may include conductivity or temperature sensing
3.5
non-automatic tumble dryer
tumble dryer which does not switch off the drying process when a certain moisture content of the load is reached, usually controlled by a timer, but may also be manually controlled
3.6
pre-treatment
successive washing, rinsing, spinning and drying of a new test load prior to its first use to avoid rapid changes of characteristics during the tests
3.7
normalisation
successive washing, rinsing, spinning and drying of a test load after a pre-determined number of cycles to bring the test load to a normal state
3.8
conditioning
treatment of test load to assure homogenous condition
3.9
programme
series of operations which are pre-defined and which are declared as suitable for drying certain types of textiles