《SASO-1235-1996-ENG.pdf》由会员分享，可在线阅读，更多相关《SASO-1235-1996-ENG.pdf（34页珍藏版）》请在三一文库上搜索。
1、KINGDOM OF SAUDI ARABIA SSA A996 .- ._ SAUDI ARABIAN STANDARD .- METHODS OF TEST FOR HOUSEHOLD ELECTRIC FREEZERS SAUDI ARABIAN STANDARDS ORGANIZATION 1 Methods of Test for Houshold Electric Freezers - 1- 2- 3- 3.1 3.2 3.2.1 Scope and Field of Application This standard is concerned with the methods o
2、f test for household freezers of both compression and absorption types operated by electrical energy derived from a single pliase A.C. 60 Hz supply with rated voltage of 220 and /or 127 volts. Supplementary referencs Saudi Standard? SSA . . ?Houshold Electric Freezers? REQUIREMENTS AND ARRANGEMENTS
3、The following shall be considered: Room temperature hi tlis standard, the temperature shall be in the range between 16?c and 32?c and the relative humidity shall be (60 the test room, and to eliminate possibility of any point in the space in which it is, enclosed being at a temperature other than th
4、e ambient temperature assigned for testing. Air circulation shall be such that the specified ambient temperature is obtained within the allowable tolerance, and such that the fieezer is not exposed to a i r currents of velocity above 151n/minute, and that the vertical ambient temperature gradient -o
5、m the platform which carries the fieezer to a height of 2 m shall not exceed 2 k/m. Electric power supply The supply voltage shall be adjusted, to the rated voltage, to the mean value of the voltage range, or to the specified test voltage, w i t h a tolerance of (+i)% of the value. The supply -equen
6、cy varition shall be w i t h i n (Al)% of the rated frequency. Measuring instruments -,-,- - STD-SAS0 L235-ENGL 197b D 800b3Bb 0027892 507 ai I I Size (inm) 25 x 50 x 100 5 0 “ 100 x 100 50 x 100 200 3.5 Test packages Mass (9) 125 500 1 O00 Test packages shall be of rvectaiigdar parallel piped shape
7、. - 3.5.1 sizes and tolerances on linear drmensions: 1.5 mm for 25 mm and 50 mm dunensions; f 3 .O mm for 1 O0 and 200 mm dimensions on mass : * 2% 3.5.2 Composition The packages shall consist of 3 S.2.1 A suitable filling material, containing per each 1000 g, 23 O g oxy-ethyl-methyl-cellulose, 764.
8、2 g water, 5g sodium cldoride, O .8g parachlorometacresol. Tolerance on mass: Jt 2% Tiic addition of about 4% of water is rccomnicndcd in order to compensale for evaporation during the preparation of tiic filling material - -. I -,-,- STD-SAS0 1235-ENGL 199b I 8 0 O b 3 b 0027893 443 I The ffeeziiig
9、 point of tlis material is - 1C (its thermal characteristics correspand to those of lean beef). - 3.5.2.2 A wrapper, consisting of a sheet of plastic *- or any other suitable nature that moisture exchange with the ambient material of such medium is negligible. After filling, tlie wrapping sheet shal
10、l be sealed. 3.5.3 Some 500g packages shall be provided with electrical thermocouples placed at their geometrical centres so as to be used for temperature measurements. These packages are called “M packages. 3.6 Freezer arrangements 3.6.1 Before testing, the freezer shall be installed in accordance
11、w i t h the manuacturers instructions and all intemd fittings supplied witli the appliance shall be put in poistion. 3.6.2 If necessary the interior of the freezer shall be dried and the evaporator defrosted. 3.6.3 The thermostat shall be adjusted accordmg to the mandachu-ers instructions, where app
12、licable . 3.6.4 The appliance shall be operated at the ambient temperahire ofthe test, without loading, but with the door or lid closed or a running- in period not less than 24h. 3.7 Stable operating conditions L n the case of cyclic operation of the refrigerating system, stable operating ionditions
13、 are deemed to be reached when, or each of the “M? packages the temperature at all corresponding points during successive operating cycler aFee withi -t 0.5.K. hi tlie case of continuous operation of the refrigerating system, stable operating Conditions are deemed to be reached when, the I J * It is
14、 advisable ! o use a shcet of 170 p i 1 thick tush-prcscure poi) ethylene. covered cstcrnally witli ;i shcet of apprasiniately 12.5 pm thick pol) tcrephthaiatc. thc layers being bonded togetlicr. / -A .: -z- - - . . . . . . ? . . -,-,- STD-SAS0 2235-ENGL L99b 80lIb38b 002989Li 38T = t t increase or
15、decrease in the temperature of all the “M packages does not exceed 0.5.K during a a penad of Ish. stable operating conditions are considered to have beeil maintained during the tests if the temperature fluctuations do not exceed G.5 .K. 4- Visual inspectioii The freezer shall be visually inspected t
16、o ensure coiifonnity of the materials, finish, constituents, internal wiring, construction safety measures and markings with their relevant requirements. 5- 5.1 Shelf area - Determination of storage shelf area. . 5.1.1 Shelf composed of a single part The area is the product of the width by the depth
17、. These two dimensions are determined as shown in Figs 5A, 5B and 5C. 5.1.2 Shelf with juxtaposed parts When the distance between two parts does not exceed 2 0 m , the dimensions shall be meausred as for a shelf composed of a single part. when the distance is more than 20 m, theareashallbe measured
18、for each of the parts, Fig. 5D. 5.2 Particular cases The bottom of the enclosed space is considered as a shelf. When an inner wall is not vertical, the dimension of the shelf shall be rneasied with reference to tlie vertical plane cutting this surface at the inid-height between the shelf under consi
19、deration and tlie shdf or !iorizmtd slw-fxe immediately above. Any part of the shelves or the bottom of the appliance having less than 100 m i n vertical clearance above, when all the shelves are in position, shall be excluded for calculating the storage area. . . -,-,- 5.3 Door shelves the shelf ar
20、ea is the product of the width by the depth. These two dimensions shall be determined in accordance with 5.1 and 5.2. 5.4 Baskets the basket area is the product of the two mean horizontal dimensions. The area shall not be considered if the vertical clearance above the inner surface of the bottom of
21、the basket is less than 8 0 . 6- Determination of storage volume 6.1 Inside dimensions of the cabinet. 6.1.1 Top-opening type. 6.1.1.1 Inside depth: The mean horizontal distance between the fiont aid rear inner surface of the front and back walls of the enclosed space of the cabinet. 6.1.1.2 Insde w
22、idth: The mean horizontal distance between the inner surfaces of the side walls of the enclosed space. 6.1.1.3 Inside height: The mean vertical distance between the inner surface of the floor and the lid or door. 6.1.2 upright type - 6.1.2.1 Inside depth : The mean horizontal distance between the fr
23、ont and the rear idde surkace of the enclosed space of the cabinet. 6. I .2.2 Inside width: The mean horizontal distance between t!ie iniier sudaces of the side walls of the enclosed space. 6.1.2.3 Inside height: The mean vertical distance between the inner su-faces of the floor and the ceiling of t
24、he enclosed space. 6.2 Gross volune The goss volume of the freezer shall be the product of inside depth, inside width and inside height. In case of intricate shapes of the Liners, tlie total voiimie sliall be divided into convenient units of volume of geometric shape. Volume of all such units shall
25、be calculated fiom the mean inside dimensions and added to yield gross volume. 6.3 Storage Volume It is determined as the gross volume reduced by the following (see figure 2): a- The volume of spaces situated outside the load limits marked by the manufacturer. b- The volume of a l l fixed Components
26、 included within the load limit. c- The volume of spaces whch are to be keptfieeforcorrect performance of the rehgerating system. d- The volume of all included removable parts which are stated by the mandacturer to be necessary for the proper functioning of the freezer except shelves and partitions
27、whose thtckness is not greater than 13 mm. e- The volume rendered unusable by the use of removable parts (baskets,- shelves) necessary for obtaining satisfactory thermal and meclianical cliaracteristices. f- Any voluine where it is impossible to place an “M package. 7- Creepgr: distances, clcmnces a
28、nd distmces throiigh insulation measuremelit. 7.1 Clearmce, i.e. the shortest direct air path, shall be measured with the following conditions: Ib Li“ *Li-yl -,-,- 17.2.3 This voltage shall be applied for one minute between the live parts and the accessible part of the body. hitially, not more than
29、half of the test voltage shall be applie, then the voltage shall be rapidly raised to the full value. I 7.2.4 Record if any breakdown of insulation occured. 18 18.1 18.2 19 19.1 Earth Continuity test A current of 25 Amp, derived from a D.C. or AC source with a no-load voltage not exceeding 12 volts
30、sha! be passed between earthing tenninal and each of the accessible metal parts in tuni, and the voltage drop is measured. . Calculate the resistance, from the current and thevoltage drop, between earthing terminal and the accessible metal parts, The resistance of the flexible cable or cord is not i
31、ncluded in the resistance measurement. Storage temperature test Operating conditions The test is conducted at an ambient temperature of (45kl)”C. The empty fieezer shall be set to nui under the following conditions: - If the thermostat is not designed for adjustment, the appliance shall be tested in
32、 the condition as delivered; - If the manufacturer has indicated a iernperaure control setting the appliance shall be tested at that setting; - If the manufacturer has indicated a range of settings for normal storage. the thermostat shall be adjusted tr? the coldest psition of this range. h al1 ot!i
33、er cases. tile laboratory slid! detenning the themostat setting which is likely to give a temperature of -1 8C. -,-,- 19.2 Storage After 2411, the storage volume of the cabinet shall be filled with as inany test-packages as it can hold, the test-packages having previously been brought to a temperatu
34、re of approximately -1 8C. The following conditions shall be met: a) On each horizontal surface intended for storage, the largest possible number of stacks of test-paclia,oes having a base of 1OOmnx 200mm shall be made using 1 kg packages laid flat (i.e.with the face having the largest dimension hor
35、izontal). When an “bf7 package has to be placed in a stack, if sliall also be placed flat, side by side with another 500g package, with the exception of door shelves. The loading may, if necessary. be completed by stacks having a base of 1OOmm x 1OOmm made with 5009 packages laid flat, and then fnal
36、ly by stacks having base of 50 m m x 1 OOmn made with 125g packages also laid flat. Four 125g package may be replaced by one 500g packages placed vertically. b) The height of the stacks shall be such that the vertical clearance between the upper edge of the highest package and the load limit, the sh
37、elf or the horizontal suface situated immediately above is not greater than 25mm. if it is greater than 2 5 m , another package shall be introduced, provided that there is no physical contact between the highest package and the shelf or the horizontal surface situated immediately above. In the case
38、of a top-opening Ceezer without load-limit !he, a verticak clearance greater than 1 O mn but less than 3 5m shall be provided between the upper edge of the highest package and the inmr surface of the lid. In the case of an upright freezer without a vertical load hie near the door, tlie stacks shall
39、be placed so that faces of the h e with the front edges of the shelves. 15 _- I c) Uiiless otherwise indicated by tlie inariufacturer the stacks of tlie test packages shall be placed in direct contact with the iiiiier surface of the freezer. Free air spaces of 15mm minimum (calculated from the noini
40、nal dimensions of the test-packases), as far as possible equal, shall be left between adjacent stacks of test packages. The use of spacers to maintain fiee air spacers between stacks of test packages is permissible provided that the spaces are of as small as possible a cross-section and of as low as
41、 possible a thermal conductivity, and are placed in such a way that they do not interfere significantly with normal air circulation. d) At least two ?MI? packages shall be placed in line with each load limit, and additional ?My packages shall be placed where the highest temperaues are expected as gi
42、ven in figures 5 to 11. e) In door compartments, the packages may, if necessary, be placed on end. However, 125g packages shall only be placed flat. 19.3 Measurements The temperature of each ?M? package shall be recorded. The loaded appliance shall be left to run until stable operating conditions ar
43、e reached. If the manufacturer has not indicated a thermostat setting and if the temperature of each ?M? package does not always remain ai or below- 1 soc, tlie laboratory shall carry out me or more fu-tlier tests after chmging the thermostat settins until the condition is fulfilled. 20 Water vapour
44、 condcnsztion test 20.1 The test is conducted at an ambient ternperatur of 32i 03C and at re!ative lim-idity ciicii that t!?e dew p3ir?t is 27-t .F?S. The thermostat seitins: the pcsitioning aird the loading of the shall be tlie sanie as for the electrical energy test. If anti-condensatiori heaters
45、are provided they -1 -ii= i6 ) / i Lac ?t -= -_ -. T r *.-a _ _- _ - _ - _ -,-,- STD-SAS0 1235-ENGL L77b 800638b 0029705 T95 r 20.2 21 21.1 slid1 not be switched on. If, however, the requirement of this test is not fiilfilled, the test shall be repeated with the anti-condensation heaters switched on
46、. After stable operating conditions have been attained, all extenial surfaces of the freezer shall be carefully wiped dry with a clean cloth and the test continued for a period of 24 h. If the appliance is fitted with automatic defrosting equipment, this test period shall be selected during the peri
47、od when condeiisation is most liable to occur. External surface areas exhibiting fog, droplets or niriiig water sliaii be outlined. Freezing capacity test Operating conditions Before the fieezing test is begun, and under the test conditions stated in 3, the empty appliance shall be cooled to the min
48、imum temperature it can reach when running under stable conditions. Owing to the diversity of control devices, the following three cases may be distinguished: 2 1.1.1 The fi-eezer is fitted with a thermostat designed for adjustment by the user and possibly with a switch for continuous running. The empty appliance shall be set in operation on continuous running or, if this is not possible, with the thermostat set for the lowest temperature. The appliance shall be left in o