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1、AS 1731.42003 (Incorporating Amendment No. 1) Australian Standard Refrigerated display cabinets Part 4: General test conditions AS 1731.42003 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 This Australian Standard was prepared by Committee ME-008, Refrigerated Display Cabinets. It was approve
2、d on behalf of the Council of Standards Australia on 26 September 2003. This Standard was published on 1 October 2003. The following are represented on Committee ME-008: Australian Greenhouse Office Australian Retailers Association Commercial Refrigeration Manufacturers Association of Australia Food
3、 Science Australia Institution of Engineers Australia Refrigeration Air Conditioning Companies Association Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and n
4、ew editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was purchased. Detailed infor
5、mation about Standards can be found by visiting the Standards Web Shop at .au and looking up the relevant Standard in the on-line catalogue. Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Global Standard, has a full listing of
6、revisions and amendments published each month. Australian StandardsTM and other products and services developed by Standards Australia are published and distributed under contract by SAI Global, which operates the Standards Web Shop. We also welcome suggestions for improvement in our Standards, and
7、especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at mailstandards.org.au, or write to the Chief Executive, Standards Australia, GPO Box 476, Sydney, NSW 2001. This Standard was issued in draft form for comment as DR 03209. Access
8、ed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.42003 (Incorporating Amendment No. 1) Australian Standard Refrigerated display cabinets Part 4: General test conditions Originated as AS B2201966. Previous edition AS 1731.42000. Second edition 2003. Reissued incorporating Amendment No. 1 (Dece
9、mber 2005). COPYRIGHT Standards Australia All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Standards Australia GPO Box 476, Sydney, NS
10、W 2001, Australia ISBN 0 7337 5528 3 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.42003 2 PREFACE This Standard was prepared by the Australian members of the Joint Standards Australia/Standards New Zealand Committee ME-008, Refrigerated Display Cabinets, to supersede AS 1731.42000,
11、Refrigerated display cabinets, Part 4: General test conditions. After consultation with stakeholders in both countries, Standards Australia and Standards New Zealand decided to develop this Standard as an Australian, rather than an Australian/New Zealand Standard. This Standard incorporates Amendmen
12、t No. 1 (December 2005). The changes required by the Amendment are indicated in the text by a marginal bar and amendment number against the clause, note, table, figure or part thereof affected. This Standard is based on International Standard prEN ISO 23953-2:2003, Refrigerated display cabinets, Par
13、t 2: Classification, requirements and test conditions. This Standard is Part 4 of a series of Standards on refrigerated display cabinets, as follows: AS 1731 Refrigerated display cabinets 1731.1 Part 1: Terms and definitions 1731.2 Part 2: General mechanical and physical requirements 1731.3 Part 3:
14、Linear dimensions, areas and volumes 1731.4 Part 4: General test conditions (this Standard) 1731.5 Part 5: Temperature test 1731.6 Part 6: Classification according to temperatures 1731.7 Part 7: Defrosting test 1731.8 Part 8: Water vapour condensation test 1731.9 Part 9: Electrical energy consumptio
15、n test 1731.10 Part 10: Test for absence of odour and taste 1731.11 Part 11: Installation, maintenance and user guide 1731.12 Part 12: Measurement of the heat extraction rate of the cabinets when the condensing unit is remote from the cabinet 1731.13 Part 13: Test reports 1731.14 Part 14: Minimum en
16、ergy performance standard (MEPS) requirements Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 3 AS 1731.42003 CONTENTS Page 1 SCOPE4 2 REFERENCED DOCUMENTS4 3 OBJECTIVE.4 4 GENERAL TEST CONDITIONS.4 5 TESTING EQUIPMENT7 6 PREPARATION OF TEST CABINET AND GENERAL INFORMATION ON TEST PROCEDURES 1
17、9 7 TEST REPORT. 20 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.42003 4 Standards Australia .au STANDARDS AUSTRALIA Australian Standard Refrigerated display cabinets Part 4: General test conditions 1 SCOPE 1.1 Scope of Standard This Standard specifies terminology, general mechanica
18、l and physical requirements, test conditions as well as installation and maintenance, for commercial refrigerators and freezers used for the sale or display of food products including beverages. This Standard does not cover refrigerated vending machines, ice-makers, cabinets intended for use in cate
19、ring and similar non-retail applications. 1.2 Scope of Part 4 This Part of AS 1731 specifies general conditions for testing refrigerated display cabinets. 2 REFERENCED DOCUMENTS The following documents are referred to in this Standard: AS 1731 Refrigerated display cabinets 1731.3 Part 3: Linear dime
20、nsions, areas and volumes 1731.5 Part 5: Temperature test 1731.7 Part 7: Defrosting test 1731.8 Part 8: Water vapour condensation test 1731.9 Part 9: Electrical energy consumption test 1731.10 Part 10: Test for absence of odour and taste 1731.13 Part 13: Test report AS/NZS 1677 Refrigerating systems
21、 1677.1 Part 1: Refrigerant classification 3 OBJECTIVE The objective of this Standard is to specify the general test conditions for refrigerated display cabinets, for use by manufacturers, suppliers, purchasers, operators and regulators of these systems. 4 GENERAL TEST CONDITIONS 4.1 General General
22、 test conditions deal with the measurement of the following characteristics: (a) Temperature (see AS 1731.5). (b) Defrosting (see AS 1731.7). (c) Water vapour condensation (see AS 1731.8). (d) Energy consumption (see AS 1731.9). A1 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 5 AS 1731.4200
23、3 .au Standards Australia (e) Physical dimensions (see AS 1731.3). (f) Absence of odour and taste (see AS 1731.10). The first five measurements shall be made in the test room (see Clause 5.1). NOTE: The first four measurements should preferably be made simultaneously. 4.2 Cabinet selection Each refr
24、igerated display cabinet intended to be tested shall, if not a prototype, be selected from stock or routine production and shall be representative as to construction and adjustment. 4.3 Cabinet installation The cabinet, including all components required for normal operation, shall be assembled, set
25、up and sited as it would be installed in service, as fas as practicable, and in accordance with the manufacturers instructions. All permanently located accessories required for normal use shall be in their respective places. 4.4 Cabinet location within the test room Cabinet location requirements in
26、relationship with minimum sizes criteria are as follows: (a) X = 2 m. (b) B 1 m, recommended. (c) Y 1.5 m. (d) A 0.8, recommended; A = Y is a recommended configuration when A 1.5 m. (e) C height of the cabinet + 0.5 m (for vertical cabinets), recommended. Figure 1 illustrates a typical cabinet locat
27、ion. Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.42003 6 Standards Australia .au FIGURE 1 CABINET LOCATION WITHIN THE TEST ROOM Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 7 AS 1731.42003 .au Standards Australia For cabinets intended to be placed against a wall, and in or
28、der to check the running of cabinets with incorporated condensing unit correctly in accordance with this Clause or the water vapour condensation according to AS 1731.8, a vertical partition shall be placed either against the rear of the cabinet or at a distance from the rear as specified by the manu
29、facturer. 5 TESTING EQUIPMENT 5.1 Test room 5.1.1 General design The test room shall be a parallelepiped space in which two of the opposite side walls, referred to as the discharge technical side wall and the return technical side wall are designed to create an even, horizontal air flow within test
30、room. By convention, the distance separating these two technical side walls is referred to as the length of the test room. The minimum useful dimensions (length, width, height) of the test room shall be dependent on the overall dimensions (length, depth, height) of the cabinet to be tested and on th
31、e location of display opening of the cabinet (see Clause 4.4). 5.1.2 Calibration An experimental evaluation of the test room performances shall be carried out a minimum of once per year (a) with test room empty and with lighting switched on; (b) in test room climate Class 3 (see Table 1); (c) measur
32、ing the velocity, temperature and relative humidity of the air at different points of two vertical planes which are parallel to the technical side walls and 600 mm away from the technical side walls; and (d) during this evaluation, the climate measuring point is located at the geometrical centre of
33、the test room. These measuring points shall form a two dimensional grid in which the step is a maximum of 500 mm in horizontal direction and vertical direction. The peripheral line of points shall be located at a maximum of 500 mm from the other two side walls, floor and ceiling. NOTE: A three dimen
34、sional grid inside the test room has to be investigated when obstacles/ irregularities of more than 1 m2 surface area projected into the room facing the discharge technical side wall exist along the walls. The mean horizontal air velocity measured during 1 min with a maximum interval of 5 s at each
35、of the points defined above shall lie between 0.1 m/s and 0.2 m/s. Air temperature measured at each of the points defined above shall not deviate from the rated temperature of the test room climate class by more than 2C. The test room shall be capable of maintaining values of humidity within 3 units
36、 of the relative humidity percentage figures of the rated humidity of the test room temperature class at the specified measuring points. Surface temperature of walls, ceiling, floor shall be measured in proximity to the points which constitute the peripheral line of the grid defined above. These sur
37、face temperatures shall remain within a tolerance of 2C in relation to the air temperature measured at the nearest point of the grid. Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 AS 1731.42003 8 Standards Australia .au 5.1.3 Operation 5.1.3.1 Liquid refrigerant inlet condition The liquid re
38、frigerant temperature at the cabinet inlet shall not be more than 10 K above the specified test room temperature. During the test no flash gas condition shall occur. 5.1.3.2 Power supply The tolerance on power supply shall be 2% for voltage and 1% for frequency in relation to the nominal values that
39、 are given on the marking plate or otherwise stated. 5.1.3.3 Air movement Air movement shall be provided. The air movement shall be, as far as practicable, parallel to the plane of the cabinet display opening and to the longitudinal axis. The length of the cabinet is defined as the longest horizonta
40、l dimension of the display opening. With the refrigerated display cabinet switched off, the air velocity at any point along the line shown in Figure 1 shall be 0.2, +0, 0.1 m/s. For closed refrigerated cabinets the direction of the airflow shall be parallel to the doors and such that the air enters
41、the cabinet when the majority of doors are open as far as practical. Test room air velocity measurements shall be carried out during the test in order to be sure that the test room is running correctly. The method of checking is left to the discretion of the testing authority. 5.1.3.4 Radiant heat T
42、he ceiling and the two non-technical side walls of the room shall be thermally insulated and shall be equipped with an inner metal skin. NOTE: A minimum level equivalent to 60 mm of rigid polyurethane foam ( = 0.03 W/mC) is recommended for the building of a new test room. (a) The floor shall be made
43、 of concrete or of thermally equivalent material and/or be sufficiently insulated to ensure that external climatic conditions do not affect the floor temperature. (b) Fluorescent lighting shall be installed to maintain (600 100) lx measured at a height of 1 m above the floor level and lit continuous
44、ly during the test period. (c) The emission spectrum of that lighting device within the infrared field shall not include peaks of a value of more than 500 W / 5 nm / 1 m. (d) The walls and ceiling and any partitions of rooms intended for the testing of refrigerated display cabinets shall be painted
45、in a colour with an emissivity between 0.9 and 1 at 25C, e.g., light grey. 5.1.3.5 Temperature gradient The temperature gradient shall be measured before the cabinet for test is put into operation. The test room temperature may vary from floor to ceiling; the vertical temperature shall not exceed 2
46、K/m and there shall not be a difference of more than 6 K between the temperature measured at the floor and at the ceiling. A1 Accessed by TAFE QUEENSLAND INSTITUTES on 25 Sep 2007 9 AS 1731.42003 .au Standards Australia DIMENSIONS IN MILLIMETRES FIGURE 2 AIR MOVEMENT Accessed by TAFE QUEENSLAND INST
47、ITUTES on 25 Sep 2007 AS 1731.42003 10 Standards Australia .au 5.1.3.6 Climate measuring point The point of measurement for ambient temperature and relative humidity: (a) For remote cabinets, shall be in accordance with Figures 3 to 6 and midway along the length of the cabinet. (b) For remote, open
48、top island site cabinets, a measurement shall be taken at both sides (see Figure 4). (c) For self-contained cabinets, the point shall be in accordance with Figures 3 to 6, with the sensor located on the test room delivery air end, 500 mm from the end of the cabinet. This is to prevent any influence
49、of the condensing unit on the measuring point. Temperatures at the measuring points shall correspond to those of the climate class of the test room (see Table 1). 5.1.4 Test room standard climates Tests shall be carried out in one of the climate classes as set out in Table 1. TABLE 1 CLIMATE CLASSES Test room climate class Dry bulb temperature C Relative humidity %