Electrical household and similar cooling and freezing appliances - Food preservation

IEC 63169:2020 deals with a test to simulate the weight loss of leafy produce, given certain conditions of temperature, humidity and air movement in one or more test zones. The test can only be applied to spaces larger than 200 mm × 150 mm ×100 mm (L × W × H).
The aim of the test is to measure the weight loss rate by measuring the weight of a test tray prior to the test and after a given duration.
Weight loss is one of the considerations for shelf life of produce. Other considerations such as condensation will be addressed in future amendments.

Appareils électrodomestiques et appareils de refroidissement et de réfrigération analogues - Conservation des aliments

L'IEC 63169:2020 porte sur un essai visant à simuler la perte de poids des légumes feuillus, dans certaines conditions de température, d'humidité et de mouvement de l'air dans une ou plusieurs zone(s) d'essai. L'essai peut uniquement être réalisé dans des espaces de plus de (200 × 150 × 100) mm (L × l × H).
L'essai vise à déterminer le taux de perte de poids en mesurant le poids d'un plateau d'essai avant de procéder à l'essai et après une certaine durée.
La perte de poids est l'une des considérations en matière de durée de conservation des produits. D'autres considérations (la condensation, par exemple) seront traitées dans des amendements à venir.

General Information

Status
Published
Publication Date
21-Jun-2020
Current Stage
PPUB - Publication issued
Completion Date
22-Jun-2020
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IEC 63169
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical household and similar cooling and freezing appliances – Food
preservation
Appareils électrodomestiques et appareils de refroidissement et de réfrigération
analogues – Conservation des aliments
IEC 63169:2020-06(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 63169
Edition 1.0 2020-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical household and similar cooling and freezing appliances – Food
preservation
Appareils électrodomestiques et appareils de refroidissement et de réfrigération
analogues – Conservation des aliments
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 67.040; 97.040.30 ISBN 978-2-8322-8523-7

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 Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 63169:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Test preparation .............................................................................................................. 7

4.1 Preparation and handling of test material ................................................................ 7

4.2 Installation and preparation of refrigerating appliance ............................................. 7

4.3 Measurement sensor uncertainty ............................................................................ 8

5 Weight loss test ............................................................................................................... 8

5.1 Procedure ............................................................................................................... 8

5.2 Weight loss calculation. ........................................................................................ 10

Annex A (informative) Non-woven material specifications .................................................... 11

A.1 General ................................................................................................................. 11

A.2 Non-woven fabric specification 1 ........................................................................... 11

A.3 Visual inspection of test trays ............................................................................... 11

A.4 Non-woven fabric, material specification 2 ............................................................ 12

Annex B (normative) Test tray ............................................................................................. 14

Annex C (informative) Outline of test report for weight loss test ........................................... 15

Annex D (informative) Equivalence of non-woven material ................................................... 17

Annex E (informative) Expected uncertainty of weight loss................................................... 18

Bibliography .......................................................................................................................... 19

Figure 1 – Examples of test tray placement ............................................................................ 9

Figure A.1 – Non-woven fabric of various ages ..................................................................... 12

Figure B.1 – Test tray ........................................................................................................... 14

Figure D.1 – Example of an acceptable equivalence ............................................................. 17

Figure E.1 – Individual laboratory test results ....................................................................... 18

Table 1 – Test equipment ....................................................................................................... 7

Table A.1 – Non-woven fabric material specification 2 .......................................................... 12

Table C.1 – Test results ........................................................................................................ 16

---------------------- Page: 4 ----------------------
IEC 63169:2020 © IEC 2020 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL HOUSEHOLD AND SIMILAR COOLING
AND FREEZING APPLIANCES – FOOD PRESERVATION
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

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rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 63169 has been prepared by subcommittee 59M: Performance of

electrical household and similar cooling and freezing appliances, of IEC technical committee

59: Performance of household and similar electrical appliances.
The text of this International Standard is based on the following documents:
FDIS Report on voting
59M/123/FDIS 59M/125/RVD

Full information on the voting for the approval of this International Standard can be found in the

report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

In this document, the following print types are used:

• terms defined in Clause 3 of this document, and in Clause 3 of IEC 62552-1:2015: Arial

bold.
---------------------- Page: 5 ----------------------
– 4 – IEC 63169:2020 © IEC 2020

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

NOTE 1 The attention of National Committees is drawn to the fact that equipment manufacturers and testing

organizations may need a transitional period following publication of a new, amended or revised IEC publication in

which to make products in accordance with the new requirements and to equip themselves for conducting new or

revised tests.

It is the recommendation of the committee that the content of this publication be adopted for implementation nationally

not earlier than 12 months or later than 36 months from the date of publication.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct understanding

of its contents. Users should therefore print this document using a colour printer.

---------------------- Page: 6 ----------------------
IEC 63169:2020 © IEC 2020 – 5 –
INTRODUCTION

The weight loss test assesses some of the food care aspects of various compartments, sub-

compartments and convenience features within a refrigerator. The test can be performed

with real or artificial foods. Real foods have seasonal and regional variations, making them

difficult for global use for repeatable and reproducible testing.

Research was carried out on materials, which proved that a particular non-woven material was

suitable to use to replicate real food. This non-woven material is used to replicate weight loss

from food in the weight loss test. Consequently, this document contains an artificial material

weight loss test.
As much as possible, alignment has been made with the performance test standards
IEC 62552-1 and IEC 62552-3.

This document contains a link to the SC 59M Supporting Documents that are available on the

IEC website. The SC 59M Supporting Documents include the 3D printing files, referred to in

Annex B. These files are intended to be used as a complement, and do not form an integral

part of the document.
---------------------- Page: 7 ----------------------
– 6 – IEC 63169:2020 © IEC 2020
ELECTRICAL HOUSEHOLD AND SIMILAR COOLING
AND FREEZING APPLIANCES – FOOD PRESERVATION
1 Scope

This document deals with a test to simulate the weight loss of leafy produce, given certain

conditions of temperature, humidity and air movement in one or more test zones. The test can

only be applied to spaces larger than 200 mm × 150 mm ×100 mm (L × W × H).

The aim of the test is to measure the weight loss rate by measuring the weight of a test tray

prior to the test and after a given duration.

NOTE Weight loss is one of the considerations for shelf life of produce. Other considerations such as condensation

will be addressed in future amendments.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies.

For undated references, the latest edition of the referenced document (including any

amendments) applies.

IEC 62552-1:2015, Household refrigerating appliances – Characteristics and test methods –

Part 1: General requirements

IEC 62552-3:2015, Household refrigerating appliances – Characteristics and test methods –

Part 3: Energy consumption and volumes
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 62552-1:2015 and

the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
test zone
space inside the refrigeration appliance subject to the weight loss test

Note 1 to entry: This space is typically a vegetable drawer or crisper but can also be any other compartment, sub-

compartment or convenience feature (see IEC 62552-1:2015, 3.3.1, 3.3.2 and 3.3.3, respectively). The manufacturer

shall fully describe any test zones to be tested.

Note 2 to entry: Any zone in a refrigerator can be a test zone. A test zone needs to be separated or at least

partially sealed from other zones in the same compartment or sub-compartment.
3.2
test tray

tray of specific dimensions containing a predefined number of test sheets which is charged

with a predefined amount of water
---------------------- Page: 8 ----------------------
IEC 63169:2020 © IEC 2020 – 7 –

Note 1 to entry: Refer to Annex B for 3D printing files. The weight loss test uses one large 18 test sheet test tray

per test zone.
3.3
weight loss
weight of water lost from the test tray between two moments in time in [g]
3.4
weight loss rate

weight loss divided by the time difference between the two moments in time expressed in

[g/24h]
3.5
test sheet

sheet of the nonwoven fabric specified in Annex A cut to a size of (75 mm × 125 mm) ± 1 mm.

4 Test preparation
4.1 Preparation and handling of test material
Table 1 – Test equipment
Test For 3D printing files (stp and stl files) for the test tray see:
Tray https://www.iec.ch/sc59m/supportingdocuments.

The test tray shall be non-absorbent and watertight. This may be achieved by coating the test tray after

the printing process.

Test Test sheets need to be cut from a filter material (typically material used for radiator evaporators). The

sheet size of a sheet is 75 mm × 125 mm.

A material is specified in Annex A. For a method of proving equivalence of alternate materials refer to

Annex D.

If the test tray is not directly used after a test series, it should be stored as follows:

a) leave the test sheets inside the test tray;
b) discard the residual water from the test tray;

c) dry the test tray with the test sheets at ambient temperature and low humidity;

d) store the test tray loaded with test sheets in the fresh food compartment of a refrigerator in

operation.

After storage, the test tray can be recharged with water for new tests. Annex A contains

provisions for checking the quality of the non-woven fabric.
4.2 Installation and preparation of refrigerating appliance
The ambient temperature shall be 25 °C (see A.2.6, A.3.1, A.3.2 and A.4.5 of
IEC 62552-1:2015).

The ambient humidity shall be in accordance with A.2.3 and A.3.6 of IEC 62552-1:2015.

The refrigerating appliance shall be installed in accordance with Annex B of IEC 62552-1:2015.

All internal accessories supplied with the refrigerating appliance shall be in their respective

positions. See 5.1 in case these accessories interfere with the location of the test tray.

---------------------- Page: 9 ----------------------
– 8 – IEC 63169:2020 © IEC 2020

Before the test load is added, all compartments and sub-compartments shall be empty. Their

temperatures shall be determined as specified in Annex D of IEC 62552-1:2015. The appliance

shall be run until steady-state conditions are observed. Where user-operated baffles or controls

are provided for adjustment of temperatures in test zones, each shall be adjusted to a setting

in accordance with the instructions provided. If no specific instructions are provided, the setting

shall be adjusted in accordance with the target temperature listed in Table 1 of
IEC 62552-3:2015 within a tolerance of ±1 K.

Other compartments and sub-compartments shall be operated with temperatures as close as

possible to the target temperatures as listed in Table 1 of IEC 62552-3:2015.

If the test zone is a sub-compartment, it shall be adjusted to a setting that results in a

temperature of the test zone as close as possible to the specified target temperature in Table 1

of IEC 62552-3:2015. The temperature of the test zone shall be measured.

The temperature of a compartment or sub-compartment temperature shall be the average of

temperature sensors placed in the positions as defined in Annex D of IEC 62552-1:2015.

4.3 Measurement sensor uncertainty

For temperature measurement uncertainty, reference is made to A.2.6 of IEC 62552-1:2015.

Because humidity measurement is optional, no uncertainty level is specified.
5 Weight loss test
5.1 Procedure
Remove any condensation from the test zone prior to placing the test tray.
The test material consists of a single large test tray with 18 test sheets.
The test may be carried out simultaneously on one or more of the test zones.

If some of the test zones are not being tested at this time, then a test tray is placed in each

such test zone prior to starting the test. Weight measurements need not be taken for these test

trays.

The weight loss test load is a single, large, 18-test-sheet, test tray. The test tray can be filled

with dry or wet test sheets. If dry test sheets are used, then the test tray should be charged

with 600 g ± 50 g of distilled water. Less water may be used if the test sheets are already wet.

Before starting the test, the quality of the test tray can be inspected as detailed in Clause A.3.

The test tray shall be placed in the centre of the base area of the test zone to be evaluated. If

it is not possible to place the test tray in the centre (due to the height or shape of the space)

then the test tray shall be placed in the centre of the next biggest area or the next possible

place where the test sheets do not touch the upper surface of the space. The test sheets in

the test tray shall face perpendicular to the refrigerator door if possible.
The test tray shall not touch the walls of the test zone.
Examples of the test tray placement are shown in Figure 1.
---------------------- Page: 10 ----------------------
IEC 63169:2020 © IEC 2020 – 9 –
Figure 1 – Examples of test tray placement

If a test tray cannot be placed due to the presence of an accessory, the accessory shall be

placed in accordance with the instructions and the test tray placed next to it.
If no specific instructions are provided:

a) in the case of a removable accessory at the required position, the accessory shall be

removed;

b) in the case of a non-removable accessory but where it can be shifted with respect to the

required position, the accessory shall be moved in the width direction to the right or in the

depth direction to the back.
During the test, the water shall not freeze.

The temperature of the water in the test tray shall be within ±2 K of the temperature of the test

zone to be evaluated. The test tray shall be preconditioned for 24 h to ensure it is within ±2 K

of the temperature of the test zone to be evaluated. Preconditioning can be in the test zone or

in another refrigerator.

A temperature sensing element shall be placed 1 cm in front of the test tray and shall not be

in contact with the test tray. If wired sensors are used, the wires shall be mounted such so they

do not cross sealing surfaces of the test zone.

The maximum duration of door openings for loading and unloading of test trays shall be 1 min.

The test tray is then loaded into the test zone for another 24 h conditioning. After the

conditioning, the weight of the test tray shall be measured (M [g]) and the time (t [h]) taken.

1 1

The weight shall be determined with a resolution of 0,1 g and the time with a resolution of 1 min.

At least 24 hours after time t , the weight of the test tray shall again be measured (M [g]) and

1 2
the time recorded (t [h]). The time taken to measure M shall be less than 2 min.
2 2
The difference between M and M shall not be greater than 200 g.
1 2

Immediately after a test, another test may be conducted using the same test zone for the 24 h

conditioning.
---------------------- Page: 11 ----------------------
– 10 – IEC 63169:2020 © IEC 2020
5.2 Weight loss calculation.
The weight loss rate is calculated as follows:
W = [(M − M )/(t − t )] × 24 [g/24h]
1 2 2 1

The weight loss test is concluded after the measurement of M and the weight loss rate

calculation.

For a suggested test report format, refer to Annex C. For guidance on expected uncertainty,

refer to Annex E.
---------------------- Page: 12 ----------------------
IEC 63169:2020 © IEC 2020 – 11 –
Annex A
(informative)
Non-woven material specifications
A.1 General

The products cited in this annex are examples of suitable products available commercially .

A.2 Non-woven fabric specification 1
Specification for Brune 02 (3614) Humidifier Filter Pads
Product Humidifier filter pad with holes and additive
Raw materials Wetlaid cellulose 330 g/m . Additive added during manufacture is
Wax shell.
Final dimensions (370 mm × 440 mm) ± 5 mm
Wax 440 mm long. Saturated down from one long edge
Punched holes 13 mm from long edge where wax/crush line has been input and 90
mm from each edge forming a gap of 260 mm between the centre of
each hole
• Supplier of already cut sheets
Lerch Raumklima GmbH
Faistenbergerstrasse 6
81545 München
Germany
Tel: +49 (0)89 64 74 95
Fax: +49 (0)89 642 18 68
E-Mail: info@lerch24.de
Internet: www.lerch-raumklima.de
• Supplier of non-woven material
www.brune-humidifier.com/shop/filters/filters-for-radiator-evaporators.html
A.3 Visual inspection of test trays

Figure A.1 gives guidance in deciding whether the test sheets are fit for use or reuse in testing.

Care should be taken to avoid contact between test sheets.
___________

This information is given for the convenience of users of this document and does not constitute an endorsement

by IEC of these brands or suppliers. Equivalent products may be used if they can be shown to lead to the same

results.
---------------------- Page: 13 ----------------------
– 12 – IEC 63169:2020 © IEC 2020
Figure A.1 – Non-woven fabric of various ages
A.4 Non-woven fabric, material specification 2

Tests have been carried out at the DITF (Deutsche Institute für Textil- und Faserforschung) and

details are found in report No E-0053-TT-18. A summary of the material specification is given

in Table A.1.
Table A.1 – Non-woven fabric material specification 2
Material composition
100 % cotton 330 g/m wetlaid cellulose
Test method Property Value
DIN 53924:1997 Rising height after 15 s (mm) 35 – 42
DIN 53923:1978 Water absorption (%) 570 – 594
ISO 9073-3:1989 Tensile strength (N/5 cm) 94 (length)
86 (cross)
ISO 9073-3:1989 Elongation (%) 3,8 (length)
4,6 (cross)
ISO 9237:1995 224 – 227
Permeability (l/s m ) at pressure
200 Pa/5 cm
---------------------- Page: 14 ----------------------
IEC 63169:2020 © IEC 2020 – 13 –
The test may be carried out
• using the material in the delivery state;
• using the material in the delivery state but after rinsing and drying;
• by placing the fibres in the cross or length direction.
---------------------- Page: 15 ----------------------
– 14 – IEC 63169:2020 © IEC 2020
Annex B
(normative)
Test tray
Figure B.1 – Test tray

3D printing files (stp and stl files) for an 18-sheet test tray are available from the online

dashboard of IEC SC 59M:
https://www.iec.ch/sc59m/supportingdocuments
---------------------- Page: 16 ----------------------
IEC 63169:2020 © IEC 2020 – 15 –
Annex C
(informative)
Outline of test report for weight loss test
Test report number
Date
Laboratory details (name & location)
Refrigerator Description.
Brand
Model Number
Test zone descriptions and conditions.
(Al
...

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