IEC 61121:2012
(Main)Tumble dryers for household use - Methods for measuring the performance
Tumble dryers for household use - Methods for measuring the performance
IEC 61121:2012 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. This excludes tumble dryers which use gas or other fuels as a heating source. 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 edition includes significant technical changes with respect to the previous edition and content has been reorganised into a more logical and simple structure.
Sèche-linge à tambour à usage domestique - Méthodes de mesure de l'aptitude à la fonction
La CEI 61121:2012 s'applique aux sèche-linge à tambour électriques à usage domestique, de types automatique et non automatique, avec ou sans alimentation en eau froide et comportant un dispositif de chauffage. Cela exclut les sèche-linge à tambour qui utilisent du gaz ou d'autres combustibles comme source de chauffage. L'objet de la présente norme est d'énumérer et de définir les principales caractéristiques d'aptitude à la fonction des sèche-linge à tambour électriques à usage domestique intéressant les consommateurs et de décrire des méthodes normalisées pour mesurer ces caractéristiques. Cette édition inclut des modifications techniques majeures par rapport à l'édition précédente et le contenu a été organisé selon une structure plus simple et logique.
General Information
Standards Content (sample)
IEC 61121
Edition 4.0 2012-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Tumble dryers for household use – Methods for measuring the performance
Sèche-linge à tambour à usage domestique – Méthodes de mesure de l'aptitude
à la fonction
IEC 61121:2012
---------------------- Page: 1 ----------------------
THIS PUBLICATION IS COPYRIGHT PROTECTED
Copyright © 2012 IEC, Geneva, Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester.If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication,
please contact the address below or your local IEC member National Committee for further information.
Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni
utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les
microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur.
Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette
publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 113, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms inIt also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: csc@iec.ch.A propos de la CEI
La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des
Normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées.
A propos des publications CEILe contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez
l’édition la plus récente, un corrigendum ou amendement peut avoir été publié.Liens utiles:
Recherche de publications CEI - www.iec.ch/searchpub Electropedia - www.electropedia.org
La recherche avancée vous permet de trouver des Le premier dictionnaire en ligne au monde de termes
publications CEI en utilisant différents critères (numéro de électroniques et électriques. Il contient plus de 30 000
référence, texte, comité d’études,…). termes et définitions en anglais et en français, ainsi que
Elle donne aussi des informations sur les projets et les les termes équivalents dans les langues additionnelles.
publications remplacées ou retirées. Egalement appelé Vocabulaire Electrotechnique
International (VEI) en ligne.Just Published CEI - webstore.iec.ch/justpublished
Service Clients - webstore.iec.ch/csc
Restez informé sur les nouvelles publications de la CEI.
Just Published détaille les nouvelles publications parues. Si vous désirez nous donner des commentaires sur
Disponible en ligne et aussi une fois par mois par email. cette publication ou si vous avez des questions
contactez-nous: csc@iec.ch.---------------------- Page: 2 ----------------------
IEC 61121
Edition 4.0 2012-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Tumble dryers for household use – Methods for measuring the performance
Sèche-linge à tambour à usage domestique – Méthodes de mesure de l'aptitude
à la fonction
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 97.060 ISBN 978-2-8322-0936-3
Warning! Make sure that you obtained this publication from an authorized distributor.
Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.
® Registered trademark of the International Electrotechnical CommissionMarque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – 61121 © IEC:2012
CONTENTS
FOREWORD ........................................................................................................................... 5
INTRODUCTION ..................................................................................................................... 7
1 Scope ............................................................................................................................... 8
2 Normative references ....................................................................................................... 8
3 Terms, definitions and symbols ........................................................................................ 8
3.1 Terms and definitions .............................................................................................. 8
3.2 List of symbols ...................................................................................................... 12
4 Requirements ................................................................................................................. 13
4.1 General ................................................................................................................. 13
4.2 Rated capacity ...................................................................................................... 13
4.3 Dimensions ........................................................................................................... 14
5 Test conditions, materials, equipment and instrumentation ............................................. 14
5.1 General ................................................................................................................. 14
5.2 Ambient conditions ................................................................................................ 14
5.2.1 Electricity supply ....................................................................................... 14
5.2.2 Water supply ............................................................................................. 15
5.2.3 Ambient temperature and humidity ............................................................ 16
5.3 Test materials ....................................................................................................... 16
5.3.1 General ..................................................................................................... 16
5.3.2 Test loads ................................................................................................. 16
5.3.3 Detergents ................................................................................................. 17
5.4 Equipment ............................................................................................................. 17
5.4.1 Equipment for normalization ...................................................................... 17
5.4.2 Equipment for conditioning the test load .................................................... 17
5.4.3 Equipment for wetting the test load prior to a test ...................................... 17
5.4.4 Other equipment ........................................................................................ 17
5.5 Instrumentation and accuracy ................................................................................ 18
6 Preparation for testing .................................................................................................... 18
6.1 General ................................................................................................................. 18
6.2 Installation of the tumble dryer .............................................................................. 18
6.3 Preparation of the tumble dryer for a test series .................................................... 19
6.4 Preparation of the tumble dryer for a test run ........................................................ 19
6.5 Preparation of test loads ....................................................................................... 19
6.5.1 General ..................................................................................................... 19
6.5.2 Pre-treatment of new test load items prior to use ....................................... 20
6.5.3 Requirements regarding the age of test load items .................................... 20
6.5.4 Normalization of test load items ................................................................. 20
6.5.5 Conditioning of test load items ................................................................... 21
6.5.6 Test load composition ................................................................................ 22
6.5.7 Wetting ...................................................................................................... 24
7 Performance measurements – General requirements ..................................................... 24
8 Tests for performance .................................................................................................... 25
8.1 General ................................................................................................................. 25
8.2 Test procedure for performance tests .................................................................... 25
8.2.1 Test conditions, materials and preparation for testing ................................ 25
---------------------- Page: 4 ----------------------61121 © IEC:2012 – 3 –
8.2.2 Programme ................................................................................................ 25
8.2.3 Test load ................................................................................................... 26
8.2.4 Test procedure .......................................................................................... 26
8.2.5 Validity of a test run ................................................................................... 26
8.2.6 Validity of a test series .............................................................................. 27
8.3 Measurements to determine water and energy consumption and programmetime ....................................................................................................................... 27
8.3.1 General ..................................................................................................... 27
8.3.2 Procedure .................................................................................................. 28
8.4 Measurements to determine condensation efficiency ............................................. 28
8.4.1 General ..................................................................................................... 28
8.4.2 Procedure .................................................................................................. 28
8.5 Measurements to determine evenness of drying .................................................... 28
8.5.1 General ..................................................................................................... 28
8.5.2 Procedure .................................................................................................. 28
8.6 Measurements to determine exhaust air volume .................................................... 29
9 Assessment of performance ........................................................................................... 29
9.1 General ................................................................................................................. 29
9.2 Final moisture content of the load .......................................................................... 29
9.3 Corrected electrical energy consumption ............................................................... 30
9.4 Corrected water consumption ................................................................................ 30
9.5 Corrected programme time .................................................................................... 31
9.6 Condensation efficiency ........................................................................................ 32
9.7 Evenness of drying ................................................................................................ 32
9.8 Exhaust air volume ................................................................................................ 33
10 Data to be reported ........................................................................................................ 33
Annex A (normative) Reference list ...................................................................................... 34
Annex B (normative) Nominal and standard exhaust duct for tumble dryer testing ................ 35
Annex C (informative) Flow diagrams ................................................................................... 38
Annex D (normative) Test report – data to be reported ......................................................... 40
Annex E (normative) Procedure to determine test load size where rated capacity is not
declared ............................................................................................................................... 44
Annex F (normative) Flexible initial moisture content method ............................................... 45
Annex G (informative) Assessment of evenness of drying .................................................... 47
Annex H (informative) Measurement of exhaust air volume .................................................. 48
Bibliography .......................................................................................................................... 50
Figure B.1 – Pressure/volumetric air flow curve .................................................................... 35
Figure B.2 – Standard exhaust duct (dimensions are in millimetres)..................................... 36
Figure B.3 – Standard exhaust simulator (dimensions are in millimetres) ............................. 37
Figure C.1 – Decision chart illustrating the requirements for a valid test series for
automatic tumble dryers ........................................................................................................ 38
Figure C.2 – Decision chart illustrating the requirements for a valid test series for non
automatic tumble dryers ........................................................................................................ 39
Figure H.1 – Suction chamber setup ..................................................................................... 49
Table 1 – List of symbols ...................................................................................................... 12
---------------------- Page: 5 ----------------------– 4 – 61121 © IEC:2012
Table 2 – Specification of instruments .................................................................................. 18
Table 3 – Number of items in the cotton test load for various test load masses .................... 22
Table 4 – Number of items in the synthetic/blends test load for various test load
masses ................................................................................................................................. 23
Table 5 – Specifications for initial moisture content in the test load ....................................... 24
Table 6 – Specification for final moisture content of the test load after drying ...................... 26
Table D.1 – Identification data .............................................................................................. 40
Table D.2 – Test measurements ........................................................................................... 41
Table D.3 – Test conditions and materials ............................................................................ 43
Table D.4 – Weighted average age – Cotton load ................................................................. 43
---------------------- Page: 6 ----------------------61121 © IEC:2012 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
TUMBLE DRYERS FOR HOUSEHOLD USE –
METHODS FOR MEASURING THE PERFORMANCE
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61121 has been prepared by subcommittee 59D: Home laundry
appliances, of IEC technical committee 59: Performance of household and similar electrical
appliances.This fourth edition cancels and replaces the third edition published in 2002 and Amendment 1
(2005). This edition constitutes a technical revision.This edition includes the following significant technical changes with respect to the previous
edition:a) General:
• more terms have been defined and some previous definitions have been streamlined,
in addition to the correction of some symbols and equations;• where possible, definitions and terms have been used in common with
IEC 60456:2010;
• the content has been organised into a more logical and simple structure, and repetitive
sections have been removed.---------------------- Page: 7 ----------------------
– 6 – 61121 © IEC:2012
b) Conditions of measurement:
• the wording of various sections has been revised to reduce ambiguity;
• limits have been defined for water characteristics for automatic tumble dryers that are
sensitive to conductivity as well as methods to adjust these characteristics where
necessary.c) Reproducibility and repeatability of test results:
• revision of the specification for the cotton test load to include suitable test materials
which are currently available on the market;• more careful definition of the process and conditions for pre-treatment, conditioning
and normalization.d) Test methods:
• accuracy of measurement has been defined for all instruments;
• limits and interpretations of the allowable final moisture content for each type of
dryer are now defined;• practical advice regarding the test procedure has been given with the aim of reducing
ambiguity.Words in bold in the text are defined in Clause 3.
This bilingual version (2013-07) corresponds to the monolingual English version, published in
2012-02.The text of this standard is based on the following documents:
FDIS Report on voting
59D/393/FDIS 59D/395/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.The French version of this standard has not been voted upon.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 8 ----------------------
61121 © IEC:2012 – 7 –
INTRODUCTION
This fourth edition has been developed in light of experience with use of the third edition of
IEC 61121. The structure has been revised to ensure that this remains harmonised with the
IEC 60456:2010 for clothes washers.---------------------- Page: 9 ----------------------
– 8 – 61121 © IEC:2012
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. This excludes tumble dryers which use gas or other fuels as a heating
source.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.NOTE This International Standard applies also to tumble dryers for communal use in blocks of flats or in
launderettes. It does not apply to tumble dryers for commercial laundries.2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including anyamendments) applies.
IEC 60335-2-11:2008, Household and similar electrical appliances – Safety – Part 2-11:
Particular requirements for tumble dryersIEC 60456:2010, Clothes washing machines for household use – Methods for measuring the
performanceIEC 60734:- , Household electrical appliances – Performance – Water for testing
IEC 62053-21:2003, Electricity metering equipment (a.c.) – Particular requirements – Part 21:
Static meters for active energy (classes 1 and 2)IEC 62301:2011, Household electrical appliances – Measurement of standby power
ISO 5167-1:2003, Measurement of fluid flow by means of pressure differential devices
inserted in circular cross-section conduits running full – Part 1: General principles and
requirementsISO 80000-1:2009, Quantities and units – Part 1: General
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply:
___________
To be published.
---------------------- Page: 10 ----------------------
61121 © IEC:2012 – 9 –
3.1.1
tumble dryer
appliance in which textiles are dried by tumbling in a rotating drum, through which air is
passed3.1.2
air vented tumble dryer
tumble dryer that draws in fresh air which is passed over the textiles and where the resulting
moist air is exhausted into the room or vented outside3.1.3
condenser tumble dryer
tumble dryer which includes a device for removing moisture from the air used for the drying
process3.1.4
automatic tumble dryer
tumble dryer which switches off the drying process when a certain moisture content of the
load is reachedNote 1 to entry: This may include systems that use conductivity or temperature sensing.
3.1.5non-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 controlled manually
3.1.6test load
textile load used for testing
3.1.7
pre-treatment
processing of a new test load prior to its first use to avoid rapid changes of characteristics
during the tests3.1.8
conditioning
bringing the test load into thermodynamic equilibrium with the defined ambient air conditions
of temperature and humidityNote 1 to entry: The process of conditioning is not the same as "wetting" which is described in 6.5.7.
3.1.9test run
single performance assessment
3.1.10
test series
group of test runs on a tumble dryer which, collectively, are used to assess the performance
of that tumble dryer3.1.11
operation
each performance of a function that occurs during the tumble dryer drying process such as
heating up, drying, cooling, anti-creasing---------------------- Page: 11 ----------------------
– 10 – 61121 © IEC:2012
3.1.12
programme
series of operations which are pre-defined within the tumble dryer and which are declared
by the manufacturer as suitable for drying certain types of textiles3.1.13
end of the programme
moment in time when the tumble dryer indicates the programme is complete and the load is
accessible to the userNote 1 to entry: Where there is no such indicator and the door is locked during operation, the programme is
deemed to be complete when the load is accessible to the user. Where there is no indicator and the door is not
locked during operation, the programme is deemed to be complete when the power consumption of the appliance
drops to a steady state condition and it is not performing any function. For non-automatic tumble dryers, the
programme is deemed to be complete when it is stopped by the operator.Note 2 to entry: An indication of the end of the programme may be in the form of a light (on or off), a sound, an
indicator shown on a display or the release of a door or latch. In some tumble dryers there may be a short delay
from an end of the programme indicator until the load is accessible by the user.3.1.14
programme time
period of time from the initiation of the programme (excluding any user programmed delay)
until the end of the programme3.1.15
cycle
complete drying process, as defined by the selected programme, consisting of a series of
operations including any operations that occur after the end of the programmeNote 1 to entry: Examples of operations that may occur after the completion of the programme are monitoring
and anti- creasing operations (where applicable).3.1.16
cycle time
period of time from the initiation of the programme (excluding any user programmed delay)
until all activity ceases. Activity is considered to have ceased when the power consumption
reverts to a steady state condition that persists indefinitely without user intervention. If there
is no activity after the end of the programme, the cycle time i...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.