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1、a Date: 20 December 2007 Origin: International Latest date for receipt of comments: 31 March 2008 Project no.: 2007/03430 Responsible committee: CPL/61/3 Refrigerators and food freezers Interested committees: Title: Draft BS EN 60335-2-24 ED.7.0 Household and similar electrical appliances - Safety P
2、art 2-89: Particular requirements for refrigerating appliances ice-cream appliances and ice-makers Supersession information: If this document is published as a standard, the UK implementation of it will supersede BSEN60335-2-24 : 2003 and partially supersede. NONE If you are aware of a current natio
3、nal standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 31 March 2008. This draft is issued to allow comments from interested parties; all comments will
4、be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. No copying is allowed, in any form, without prior written permission from BSI except as permitted under the Copyright, Designs and Patent Act 1988 or for circulation wit
5、hin a nominating organization for briefing purposes. Electronic circulation is limited to dissemination by e-mail within such an organization by committee members. Further copies of this draft may be purchased from BSI Customer Services, Tel: +44(0) 20 8996 9001 or email ordersbsi-. British, Interna
6、tional and foreign standards are also available from BSI Customer Services. Information on the co-operating organizations represented on the committees referenced above may be obtained from the responsible committee secretary. Cross-references The British Standards which implement International or E
7、uropean publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-. Direct tel: 020 8996 7273 Responsible Committee Secretary: Mrs G D Salt (BSI) E-mail: geraldine.saltbsi- Draft for Public Comment Head Office 389 Chiswick High Roa
8、d London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30175425 DC Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:25:15 GMT+00:00 2008, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on inter
9、national discussions in which the UK has taken an active part. Your comments on this draft are welcome and will assist in the preparation of the consequent standard. If no comments are received to the contrary, then the UK will approve this draft. There is a high probability that this text could be
10、adopted by CENELEC as a reference document for harmonization or as a European Standard. Recipients of this draft are requested to comment on the text bearing in mind this possibility. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this
11、 draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Co
12、mmittee Secretary at the address given on the front cover. Comments should be compatible with Version 6.0 or Version 97 of Microsoft Word for Windows, if possible; otherwise comments in ASCII text format are acceptable. Any comments not submitted electronically should still adhere to these format re
13、quirements. All comments submitted should be presented as given in the example below. Further information on submitting comments and how to obtain a blank electronic version of a comment form are available from the BSI web site at: http:/www.bsi- Template for comments and secretariat observations Da
14、te: xx/xx/200x Document: ISO/DIS xxxxx 1 2 (3) 4 5 (6) (7) MB Clause No./ Subclause No./ Annex (e.g. 3.1) Paragraph/ Figure/Table/ Note (e.g. Table 1) Type of com- ment Comment (justification for change) by the MB Proposed change by the MB Secretariat observations on each comment submitted 3.1 Defin
15、ition 1 ed Definition is ambiguous and needs clarifying. Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV p
16、hotometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:25:15 GMT+00:00 2008, Uncontrolled Copy, (c) BSI FORM CD (IEC) 2002-08-08 61C/407/CD COMMITTEE DRAF
17、T (CD) IEC/TC or SC: SC 61C Project number IEC 60335-2-24 Ed 7.0 Title of TC/SC: Household appliances for refrigeration Date of circulation 2007-12-07 Closing date for comments 2008-03-07 Also of interest to the following committees Supersedes document 61C/405/MCR Functions concerned: Safety EMC Env
18、ironment Quality assurance Secretary: Dr X Zhou X THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE. IT SHOULD NOT BE USED FOR REFERENCE PURPOSES. RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO
19、PROVIDE SUPPORTING DOCUMENTATION. Title: IEC 60335-2-24 Ed 7.0:Household and similar electrical appliances - Safety Part 2-24: Particular requirements for refrigerating appliances, ice-cream appliances and ice-makers (Titre) : CEI 60335-2-24 Ed 7.0: Appareils lectrodomestiques et analogues - Scurit
20、- Partie 2-24: Rgles particulires pour les appareils de rfrigration, les appareils de glaces la crme et les fabriques de glace Introductory note This CD for the seventh edition of IEC 60335-2-24 is circulated based on the following documents (see also see 61C/400/RM): 61C/368/DC and 61C/379A/INF 61C
21、/369/DC and 61C/382A/INF 61C/372/DC and 61C/383A/INF 61C/391/DC and 61C/395A/INF Copyright 2007 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this electronic file, to make a copy and to print out the content for the sole purpose of preparing Nationa
22、l Committee positions. You may not copy or “mirror“ the file or printed version of the document, or any part of it, for any other purpose without permission in writing from IEC. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:25:15 GMT+00:00 2008, Uncontrolle
23、d Copy, (c) BSI 2 61C/407/CD The following changes to IEC 60335-2-24 Ed 6.2 will form the basis of Ed 7 1 Scope Replace the sixth paragraph by the following. Refrigerating appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as refrige
24、rating appliances used in staff kitchen areas in shops, offices and other working environments; refrigerating appliances used in farm houses and by clients in hotels, motels and other residential type environments; refrigerating appliances used in bed and breakfast type environments; refrigerating a
25、ppliances use in catering and similar non-retail applications. are within the scope of this standard. Add the following to Note 2 commercial refrigerators and freezers used for the display of food products, including beverages, for retail sale (IEC 60335- 2-89); 2 Normative references In the additio
26、n, add the following: IEC 60068-2-11, Environmental testing Part 2 Tests. Tests Ka: Salt mist ISO 209-1, Wrought aluminium and aluminium alloys - Chemical composition and forms of products Part 1: Chemical composition 3 Definitions 3.101 Add the following to the end of the term definition, “includin
27、g cooling of beverages” 3.102 In the term definition replace “liquid state“ by “original state” and delete “(condenser)” Add the following new definitions: 3.112 transcritical refrigeration system refrigeration system where the pressure in the high pressure side is above the pressure where the vapou
28、r and liquid states of the refrigerant can coexist in thermodynamic equilibrium 3.113 gas cooler heat exchanger in which, after compression the refrigerant is cooled down, by transferring heat to an external cooling medium, without changing state NOTE A gas cooler is normally used in transcritical r
29、efrigeration systems. 3.114 design pressure (DP) gauge pressure that has been assigned to the high pressure side of a transcritical refrigeration system Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:25:15 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 3 61C/407
30、/CD 3.115 bursting disc disc or foil which bursts at a predetermined pressure to reduce a pressure in a refrigeration system 3.116 pressure relief device pressure sensing device, intended to reduce pressure automatically when pressures within the refrigeration system exceed the setting pressure of t
31、he device 7 Marking 7.1 In the addition, add the following: Appliances employing R-744 in a transcritical refrigeration system shall be marked with the substance of the following: WARNING: System contains refrigerant under high pressure. Do not tamper with the system. It must be serviced by qualifie
32、d persons only. Appliances employing R-744 in a transcritical refrigeration system shall be marked with symbol ISO 7000 1701. 7.6 In the addition, add the following: symbol ISO 7000 1701 high pressure: 7.12 In the addition, add the following: If symbol ISO 7000 1701 is used, its meaning shall be exp
33、lained. The instructions shall include the substance of the following: This appliance is intended to be used in household and similar applications such as staff kitchen areas in shops, offices and other working environments; farm houses and by clients in hotels, motels and other residential type env
34、ironments; bed and breakfast type environments; catering and similar non-retail applications. Note 104 If the manufacturer wants to limit the use of the appliance to less than the above, this has to be clearly stated in the instructions. 7.12.1 In the addition, add the following: In appliances emplo
35、ying R-744 in a transcritical refrigeration system the instructions shall include the substance of the following WARNING: The refrigeration system is under high pressure. Do not tamper with it. Contact qualified service personal before disposal. Licensed Copy: London South Bank University, London So
36、uth Bank University, Fri Feb 15 07:25:15 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 4 61C/407/CD 19 Abnormal operation 19.104 Replace the 2nd paragraph with the following: Compliance is checked by the following test, for which the appliance is empty, the refrigerating system is switched off or rende
37、red inoperative, with the lamp circuit remaining operable and doors or lids are in the most unfavourable open position or closed, whichever is the more onerous 22 Construction 22.107 Replace the test specification by the following: Compliance is checked by inspection and by the tests of 22.107.1, 22
38、.107.2 and if necessary, 22.107.3. 22.107.1 Add the following to the first paragraph of the test specification. For refrigerant circuits that do not meet the corrosion requirements of 22.107.3 a leak is also simulated at any point of the cooling circuit that is nearest to an entry of a pipe or cable
39、 into a food storage compartment. Add the following to Note 1 as a new second sentence Aluminium to copper joints are also critical points unless they are protected against corrosion by a coating or sleeving that excludes oxygen. In the ninth paragraph of the test specification replace “1 h” by “24
40、h” Add the following new subclauses. 22.107.3 If aluminium having a purity of less than 99,5% according to ISO 209-1 is used in a protected cooling system that is embedded in thermal insulation, a sample of the cooling system is subjected to the salt mist test of IEC 60068-2-11 for a test duration o
41、f 48 h. After the test there shall be no sign of blistering, pitting or other active corrosion of the aluminium or its coating, if any. NOTE Aluminium with an ISO designation of Al 99,5 or an international registration record of 1050 A has a purity of 99,5%. Add the following new subclauses 22.115 I
42、n compression-type appliances which use flammable refrigerant in their cooling system, all possible inadvertent contact points between uncoated aluminium and copper pipes or similar dissimilar metals shall be prevented from galvanic coupling by positive means such as the use of insulated sleeving or
43、 spacers. Compliance is checked by inspection. 22.116 Appliances employing a transcritical refrigeration system shall in the high pressure side of the refrigeration system include a pressure relief device on the compressor or between the compressor and the gas cooler. There shall be no shut off devi
44、ces or other components except piping between the compressor and the pressure relief device, which could introduce a pressure drop. The pressure relief device shall be mounted so that the refrigerant released from the system cannot cause any harm to the user of the appliance. The aperture shall be l
45、ocated so that it is unlikely to be obstructed in normal use. The pressure relief device shall have no provisions for setting by the end user. Licensed Copy: London South Bank University, London South Bank University, Fri Feb 15 07:25:15 GMT+00:00 2008, Uncontrolled Copy, (c) BSI 5 61C/407/CD The op
46、erating pressure of the pressure relief device shall be no higher than the design pressure of the high pressure side. The design pressure of the high pressure side shall be not less than the minimum high side test pressure required in table 101 of subclause 22.7 of IEC 60335-2-34 divided by 3. The r
47、efrigeration system, including all components, shall withstand the pressures expected in normal and abnormal use and during standstill. Pressure testing has to be done on the complete refrigeration system, however it can be done separately for the low pressure side and for the high pressure side. Co
48、mpliance is checked by inspection and by the following test: The pressure relief device is made inoperable and the test pressure is raised gradually. for the high pressure side until a pressure not less than the minimum high side test pressure required in Table 101 of subclause 22.7 of IEC 60335-2-3
49、4 is reached, however not less than 3 times the DP; for the low pressure side until a pressure not less than the minimum low side test pressure required in Table 102 of subclause 22.7 of IEC 60335-2-34 is reached. For a refrigeration system with an intermediate pressure between high pressure side and low pressure side, all parts subjected to the intermediate pressure are considered to be on the low pressur