IEC 60704-2-14:2007

Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-14: Particular requirements for refrigerators, frozen-food storage cabinets and food freezers

Specifies methods for measuring airborne acoustical noise emitted by electric refrigerators, frozen-food storage cabinets, food freezers and their combinations for household and similar uses, supplied from the mains or from batteries. This standard does not apply to appliances, equipment or machines designed exclusively for industrial or commercial purposes.

Appareils électrodomestiques et analogues - Code d'essai pour la détermination du bruit aérien - Partie 2-14: Règles particulières pour les réfrigérateurs, conservateurs et congélateurs

Spécifie des méthodes de mesure du bruit aérien émis par des réfrigérateurs, conservateurs et congélateurs électriques à usage ménager et analogue, et leurs combinaisons, alimentés par le réseau ou par accumulateurs. La présente norme ne s'applique pas aux appareils, équipements ou machines conçus exclusivement pour les besoins commerciaux et industriels.

General Information

• Status: Published
• Publication Date: 12-Dec-2007
• ICS: 17.140.20 - Noise emitted by machines and equipment
• ICS: 97.040.30 - Domestic refrigerating appliances
• Technical Committee: SC 59M - Performance of electrical household and similar cooling and freezing appliances
• Current Stage: DELPUB - Deleted Publication
• Start Date: 30-Jan-2013
• Completion Date: 26-Oct-2025

Relations

• Revised: IEC 60704-2-14:2013 - Household and similar electrical appliances - Test code for the determination of airborne acoustical noise - Part 2-14: Particular requirements for refrigerators, frozen-food storage cabinets and food freezers
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60704-2-14
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-14: Particular requirements for refrigerators, frozen-food storage cabinets
and food freezers
Appareils électrodomestiques et analogues – Code d’essai pour la détermination
du bruit aérien –
Partie 2-14: Règles particulières pour les réfrigérateurs, conservateurs et
congélateurs
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IEC 60704-2-14
Edition 1.0 2007-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise –
Part 2-14: Particular requirements for refrigerators, frozen-food storage cabinets
and food freezers
Appareils électrodomestiques et analogues – Code d’essai pour la
détermination du bruit aérien –
Partie 2-14: Règles particulières pour les réfrigérateurs, conservateurs et
congélateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
L
CODE PRIX
ICS 97.040.30, 17.140.20 ISBN 2-8318-9498-0

– 2 – 60704-2-14 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION OF
AIRBORNE ACOUSTICAL NOISE –
Part 2-14: Particular requirements for refrigerators, frozen-food
storage cabinets and food freezers

FOREWORD
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all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
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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 60704-2-14 is published under the responsibility of IEC technical
committee 59: Performance of household and similar electrical appliances.
It cancels and replaces International Standard ISO 8960 prepared by ISO technical committee
86: Refrigeration and transferred to the IEC subsequent to IEC/SMB decision 127/11.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The list of all the parts of the IEC 60704 series, under the general title Household and similar
electrical appliances – Test code for the determination of airborne acoustical noise, can be
found on the IEC website.
60704-2-14 © IEC:2007 – 3 –
This Part 2-14 is intended to be used in conjunction with the second edition (1997) of
IEC 60704-1: Household and similar electrical appliances – Test code for the determination of
airborne acoustical noise – Part 1: General requirements.
The relevant text of Part 1 as amended by this publication establishes the test code for
refrigerators, frozen-food storage cabinets and food freezers.
This Part 2-14 supplements or modifies the corresponding clauses in IEC 60704-1. When a
particular subclause of Part 1 is not mentioned in this Part 2-14, that subclause is applicable
as far as reasonable. Where this standard states “addition”, “modification” or “replacement”,
the relevant requirements, test specifications or explanatory matter in Part 1 should be
adapted accordingly.
Subclauses or figures that are additional to those in Part 1 are numbered starting from 101.
Additional annexes are lettered AA, BB, etc.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
– 4 – 60704-2-14 © IEC:2007
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES –
TEST CODE FOR THE DETERMINATION OF
AIRBORNE ACOUSTICAL NOISE –
Part 2-14: Particular requirements for refrigerators, frozen-food
storage cabinets and food freezers

1 Scope
This part of IEC 60704 specifies methods for measuring airborne acoustical noise emitted by
electric refrigerators, frozen-food storage cabinets, food freezers and their combinations for
household and similar uses, supplied from the mains or from batteries.
The term "similar use" means "use under conditions similar to those in a household", for
example, in cafés, restaurants, hotels, and similar establishments.
This standard does not apply to appliances, equipment or machines designed exclusively for
industrial or commercial purposes.
This standard is concerned with objective methods of engineering accuracy (engineering
method, grade 2, according to IS0 2204) for determining sound power levels, (L expressed
W
in decibels with reference to a sound power of 1 pW, of airborne acoustical noise within the
specified frequency range of interest, and for specified operating conditions of the appliance
to be measured.
The frequency range of interest includes the octave bands with centre frequencies between
125 Hz and 8 000 Hz (this interval being, for practical reasons, narrower than the frequency
range of audible sound).
The following sound power levels are used:
– A-weighted sound power level, L ;
WA
– octave band sound power levels, L .
WOct
In general, the methods described are specified for appliances operated with no operator
present.
The noise measurements are made while the compressors are running.
Requirements as to an indication of the noise emission values are not the subject of this
standard.
NOTE 1 The uncertainties of measurement according to this standard usually result, for A-weighted sound power
levels, in standard deviations generally not exceeding approximately 2 dB, provided that the noise spectrum does
not contain pronounced discrete frequencies; if it does, the magnitude of the uncertainties will be larger. The
standard deviations referred to reflect the cumulative effects of all causes of measurement uncertainties, excluding
variations in the noise level of the appliance from test to test.
NOTE 2 The noise values obtained under the conditions described in this standard will not necessarily
correspond with the noise experienced under the operational conditions of practical use (see 6.4.1).
NOTE 3 For quality control during production, etc., simplified methods may be appropriate. For noise control
purposes (for example, development of quieter appliances, insulation of equipment, etc.), other measurement
methods using, for example, narrow-band frequency analysis will usually have to be applied. These methods are
not covered in this standard.
60704-2-14 © IEC:2007 – 5 –
This standard does not include methods for determining sound power levels with precision
accuracy (precision method, grade 1, according to IS0 2204) specified, for example, in IS0
3741, IS0 3742 and IS0 3745; they may, however, be applied if the appropriate
instrumentation and test environments are available.
2 Normative reference
The following referenced documents are indispensable for the application 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 60704-1:1997, Household and similar electrical appliances – Test code for the
determination of airborne acoustical noise – Part 1: General requirements
3 Terms and definitions
Clause 3 of IEC 60704-1 is applicable.
4 Measurement methods and acoustical environments
Clause 4 of IEC 60704-1 is applicable.
5 Instrumentation
Clause 5 of IEC 60704-1 is applicable.
6 Operation and location of appliances under test
Clause 6 of IEC 60704-1 is applicable with the following modifications.
6.1 Equipping and pre-conditioning of appliances
6.1.2 Addition
Loose components inside the appliance which create undue vibrations (for example, shelves
or ice-trays) shall be secured, for example, by tape, or may be adjusted.
Adjustable feet (if any) shall be adjusted to attain minimum noise emission.
Doors or lids shall be closed.
6.1.3 Replacement
Prior to noise measurements, the appliance, equipped as for the intended use, shall have
been in operation for at least 16 h for running-in at a room temperature of 25 °C ± 5 K.
The thermostat shall be set for the specified test temperature, which may be found during this
running-in period.
– 6 – 60704-2-14 © IEC:2007
6.1.4 Replacement
Immediately before each series of noise measurements, the appliances shall be operated until
a steady state has been reached but at least for three complete operating cycles. Steady-
state conditions are considered as being achieved when the duration of the compressor
running time does not deviate by more than 10 % from the running time of the previous cycle.
6.2 Supply of electric energy
6.2.1 Replacement
Appliances with mains-powered electric motor(s) shall be supplied with nominal system
voltage and frequency for the country in which the appliance is intended to be used, with a
tolerance of ±1 % on voltage and ±1 Hz on frequency. These values may deviate from the
manufacturer’s rated voltage and frequency.
The supply voltage shall be measured at the plug of a non-detachable cable or cord, or at the
appliance inlet if a detachable cable is provided, but in no case at the entrance of extension
cables or cords.
6.2.2 Replacement
Appliances with battery-powered electric motors shall be operated at the manufacturer’s
recommended voltage, with a tolerance of ±1 %.
6.3 Climatic and temperature conditions
Replacement
The appliance shall be operated under the following conditions.
Test room conditions
Ambient temperature: 22 °C ± 3 K
Relative humidity: 30 % to 85 %
Atmospheric pressure: 86 kPa to 106 kPa (860 mbar to 1 060 mbar)
The ambient temperature shall be measured 1 m above the floor of the test room, 35 cm to
one side of the cabinet.
The vertical temperature gradient shall not exceed 2 K/m.
Cabinet internal temperature
Refrigerators:
Fresh-food storage compartment: 5 °C ± 2 K
Frozen-food storage compartment: no limitation
Chiller compartment (if applicable): no limitation
Freezers: –22 C ± 2 K
Refrigerators-freezers:
Fresh-food storage compartment: 5 °C ± 2 K
Food freezer compartment without separate thermostat: no limitation
Food freezer compartment with separate thermostat: –22 °C ± 2 K
Chiller compartment (if applicable): no limitation

60704-2-14 © IEC:2007 – 7 –
NOTE 4 This temperature is the air temperature and not the temperature that is measured in test packages in
accordance with ISO 5155 and ISO 8187. An air temperature of –22 °C approximately corresponds to a test
package temperature of –18 °C.
These temperatures shall be measured by a thermocouple weighted by a copper cylinder with
a mass of 25 g in the geometric centre of the storage compartment; they shall be considered
to be the mean values during a total operating cycle.
6.4 Loading and operating of appliances
6.4.1 Addition
The appliance shall he operated without loading (i.e., empty).
Adjustable slots and openings between different compartments which may be operated by the
user shall be closed.
6.4.2 Replacement
The measurement shall commence 1 min after the start of a running period and shall pause at
the end of the same running period.
The readings shall be taken at constant time intervals over at least three running periods.
At least 30 readings shall be taken. In the case of a moving microphone, the measurements
may be made continuously over at least three running periods.
NOTE 5 This averaging can be made automatically with an L meter connected to the moving microphone or to
eq
the multiplexer which has to be used in the case of fixed microphone positions.
The readings shall be averaged on an energy basis.
Combined appliances with two compressors shall be tested with the refrigerator unit operating
under the specified temperature conditions and the freezer unit operating continuously. The
highest result shall be reported.
NOTE 6 In the case of simultaneous running of two compressors, beats are possible.
6.4.3 Replacement
It is recommended that a graphic level recorder to make a recording of the A-weighted sound
pressure level during the operational cycle(s) – time history – be applied at one of the
microphone positions (preferably in front of the appliance to be tested) or with a moving
microphone.
From this time history, the running time of the compressor can be determined.
6.5 Location and mounting of appliances
6.5.2 Subclause 6.5.2 of IEC 60704-1 is not applicable.
6.5.3 Replacement
Floor-standing appliances end counter-top or table-type appliances for placing against a wall
shall be placed in a normal position, without any resilient means other than those
incorporated or supplied with the appliance

– 8 – 60704-2-14 © IEC:2007
– either on the floor of the reverberation test room with a distance of 1 cm between the rear
of the appliance and a wall and with a minimum distance of 1 m between any other
surface of the appliance and the nearest corner of the room;
– or on the reflecting plane of the free-field environment and with a distance of 1 cm
between the rear of the appliance and the second vertical reflecting plane (wall), giving
consideration to the shape end size of the specified measurement surface.
For both types of test environment the following requirements shall be met.
– The acoustic absorption coefficient of the vertical wall shall be less than 0,06 inside the
representative field of frequencies.
– Care shall be taken to avoid any direct contact between the appliance (including
protruding parts, work-tops, spacers, etc.) and the vertical reflecting wall.
– The distance between the vertical plane and the appliance shall be established by placing
the appliance in direct contact with the wall and then moving it away for a distance of
1 cm.
6.5.4 Replacement
Wall-mounted appliances, including their accessories (if any) shall be fastened or held by an
appropriate fixture in close contact, at a height of the lowest edge of approximately 0,5 m
from the floor, without any resilient means other than those incorporated or supplied with the
appliance
– either on a wall of the reverberation test room with a minimum distance of 1 m between
any surface of the appliance and the nearest corner of the room;
– or on the second, vertical reflecting plane (wall) of the free-field environment, giving
consideration to the shape and size of the specified measurement surface.
The acoustic absorption coefficient of the vertical wall shall be less than 0,06.
6.5.5 Replacement
Appliances for building-in shall be built in accordance with the manufacturer’s instructions into
appropriate cabinets without any resilient means other than those incorporated or supplied
with the appliance. The cabinet, including the built-in appliance, shall be located as specified
for floor-standing appliances for placing against a wall (see 6.5.3).
The cabinet shall consist of uncoated chipboard, 19 mm thick, having a density of 700 kg/m ±
50 kg/m .
Irrespective of the manufacturer’s instruction, the cabinet shall be closed at the rear with a
sheet of the same material, taking into account openings for ventilation, if required.
7 Measurement of noise levels
Clause 7 of IEC 60704-1 is applicable with the following modifications.
7.1 Microphone array and measurement surface for free-field conditions
7.1.1 Addition
For wall-mounted appliances, the measurement surface according to 7.1.2 (Figure 2) shall be
used.
60704-2-14 © IEC:2007 – 9 –
7.1.5, 7.1.6, 7.1.7 and 7.1.8
These subclauses of IEC 60704-1 are not applicable.
7.1.11 Addition
NOTE 7 For a simple comparison of appliances in the same category, type and size (for example, for quality
control measurements during production), the number of microphone positions may be reduced, for example, to the
single position recommended for the several arrays for determining time historics, frequency spectra, etc.
8 Calculation of sound pressure and sound power levels
Clause 8 of IEC 60704-1 is applicable.
9 Information to be recorded
Claus
...