ISO 5155:1995 pdf free download.Household refrigerating appliances — Frozen food storage cabinets and food freezers — Characteristics and test methods.
For the purposes of this International Standard, the following definitions apply.
3.1 ApplIances NOTES
1 From the point of view of installation, there are various types ol household refrigerator-freezers and their combinations: free-standing, built-in. etc.
2 Definitions 3.1.1 and 3.2.2 are in line with those for a three star’ compartment and food freezer compartment given in ISO 8187,
3.1.1 household frozen food storage cabinet (hereinafter referred to as “three star” cabinet): Insulated cabinet of suitable volume and equipment for household use, cooled by energy-consuming means and having one or more compartments. The storage temperature of the compartments, measured as described in clause 13, is not warmer than — 18 ‘C.
3.1.2 household food freezer (hereinafter referred to as freezer): Insulated cabinet of suitable volume and equipment for household use, cooled by energy- consuming means and having one or more compartments for freezing fresh food. The freezer is suitable for freezing, from + 25 ‘C to — 18 C for class SN, N and ST appliances, and from + 32 ‘C to — 18 ‘C for class T appliances (see clause 4), a quantity of at least 4.5 kg of test packages per 100 I of its storage volume in 24 h. and in no case less than 2 kg, under the test conditions specified in clause 17. and is also suitable fQr the storage of frozen food under storage conditions (see 3.1.1).
3.2 “two star” section: Part of a freezer or of a cabinet which is not self-contained (i.e. which does not have its own individual access door or lid), in which the storage temperature (see 3.4.3), measured as described in clause 13, is not warmer than
— 12 C. (See also 7.2.4.)
3.3 General definitions
3.3.1 top-opening type: A “three star” cabinet or freezer whose compartment(s) is (are) accessible from the top.
3.3.2 uprIght type: A “three star” cabinet or freezer whose compartment(s) is (are) accessible from the front.
3.3.3 overall dimensions (doors or lids closed):
Measurements of the rectangular parallelepiped,
termined by the method given in 7.2. and also after deduction of the volume of any “two star” section.
3.3.5.6 rated storage volume: Storage volume stated by the manufacturer.
3.3.5.7 total storage volume: Sum of the storage volumes of the appliance [including any “twO star” section(s)), comprising storage volumes of “three star” cabinets and freezer compartments.
3.3.5.8 rated total storage volume: Total storage volume stated by the manufacturer.
3.3.6 Storage surface
3.3.6.1 shett For the purpose of this International Standard, a shelf is any horizontal surface (shelves, partitions, etc.) on which food can be placed.
It may be formed by one component or by components fitted side by side, which may be fixed or removable.
3.3.6.2 storage shelf area: Sum of the horizontal projections of the storage surfaces within the storage volume, including door shelves and the bottom of each compartment, determined in accordance with
7.3.
3.3.6.3 rated storage shelf area: Storage shelf area
stated by the manufacturer.
3.3.7 load limit(s): Surface enveloping the “three star” cabinet volume(s).
3.3.8 load limit tine(s): Permanent mark(s) indicating the limits of “three star” cabinet volume(s).
3.4 Definitions relating to some performance
characteristics
3.4.1 energy consumption: Consumption of a “three star” cabinet and freezer over a period of 24 h, running under stable operating conditions at an ambient temperature of + 25 ‘C (in the case of class SN, class N and class ST appliances) or + 32 C (in the case of class T “three star” cabinet and freezer) (see clause 4) and measured under the conditions specified in clause 15.
3.4.2 rated energy consumption: Energy consumption stated by the manufacturer.
3.4.3 frozen food storage temperature, ‘, i (as appropriate): Maximum temperature of the warmest “M” package of a load placed in storage as specified in 8.5.
located 350 mm from the vertical centretine of the side walls of the appliance at 1 m above the floor line.
3.4.11 temperature rise time: Period between the moment when, under specified test conditions, the temperature of the warmest “M” package in the “three star” cabinet or freezer reaches — 18 C to the moment when any of the “M’ packages (excluding any “two star” sections) first reaches a temperature of — 9 C when the operation of the refrigerating system is interrupted.
3.5 Definitions relating to the refrigerating system
3.5.1 refrigerant: Fluid used for heat transfer in a refrigerating system, which absorbs heat at a low temperature and a low pressure of the fluid and rejects heat at a higher temperature and a higher pressure of the fluid, usually involving changes of state of the fluid.
3.5.2 cooling device: Device containing the evaporator or in thermal contact with the evaporator; it may be a device with fins or may be suitably shaped for the storage of frozen food or water ice-cubes.
3.6 Definitions relating to compression-type “three star cabinets or freezers
3.6.1 compression-type “three star” cabinet or freezer: “Three star” cabinet or freezer in which refrigeration is effected by the vaporization at low pressure in a heat exchanger (evaporator) of a liquid refrigerant, the vapour thus formed being restored to the liquid state by mechanical compression to a higher pressure and subsequent cooling in another heat exchanger (condenser).
3.6.2 hermetically sealed motor-driven refrigerating compressor: Motor-compressor in which the compressor and the electric motor (or its moving parts at least) are enclosed in a shell rendered gastight by welding, brazing or other means such that dismantling is not normally possible after assembly. It does not include moving parts outside the shell.
3.6.3 hermetically sealed compressor refrigerating system: Complete system, essentially comprising a hermetically sealed motor-driven compressor, a condenser, a pressure-reducing device, an evaporator. and all other parts containing refrigerant permanently interconnected by the manufacturer by welding, brazing or other means.
3.6.4 refrigerant compressor: Mechanically operated component which withdraws refrigerant vapour
particular, sliding or revolving components shall be capable of their full movement when loaded.
Shelves, containers and similar components which are intended to be removable should be easily removable.
5.6 Refrigerating system
5.6.1 The mechanical operation of “three star” cabinets or freezers should not give rise to undue noise or vibration.
5.6.2 The design of the condenser should be such as to reduce to a minimum the accumulation of dust.
5.6.3 The evaporator shall be so designed or protected so that it will not suffer any damage during the normal use of the appliance.
The heat exchange surfaces shall be made of corrosion-resistant material, or shall be finished with a corrosion-proof non-poisonous coating resistant to temperature changes and defrosting.
5.6.4 The means of adjustment of temperature control devices, if intended to be adjusted by the user, should be readily accessible, and their function shall be such as to enable the appliance to meet the requirements of the performance tests.
5.6.5 Pipes and connections to moving or resiliently mounted parts should be arranged so as not to generate noise, not to touch nor to transmit vibrations to other parts, and should be so designed as to prevent failure due to fatigue. All other pipes and connections should be securely anchored. Where necessary, pipes and valves should be properly insulated.
5.6.6 Suitable means should be provided to prevent water condensed on cold parts from affecting the operation of the unit or its controls, or from causing any other damage to the three star” cabinet or freezer and its surroundings.
6 Required characteristics
6.1 Volumes and areas
6.1.1 Rated gross volume
The measured gross volume shall not be less than the rated gross volume by more than 3 % of the latter or 1 litre, whichever is the greater value.
7.2.1 Determination of gross volume
The gross volume shall be calculated by dividing the total volume into convenient units of volumes of geometric shapes which can easily be measured.
When the gross volume is determined, internal fittings such as shelves, removable partitions, containers. evaporators, thermostats and interior light housings shall be considered as not being in place. However, the gross volume shall take into account the exact shapes of the walls if they contain depressions or projections (for example, see figure 16).
7.2.2 Determination of the total storage volume
The total storage volume of the “three star” cabinet or freezer shall be the sum of the storage volumes of all compartments, including “two star” section(s), as applicable.
For the determination of storage volumes, the total volume of devices and of spaces considered unusable for the storage of food shall be deducted from the gross volume calculated in accordance with 7.2.1 (see
7.2.3).
7.2.3 Storage volume of frozen food storage cabinets and freezers
The storage volume of these appliances shall be the gross volume minus the following (for example, see figure 17):
a) the volume of spaces situated outside any load limit (natural or marked by the manufacturer);
b) the volume of spaces provided specifically for making and storing ice, except in the case of appliances fitted with automatic icemakers, when the volume occupied by a removable storage bucket shall be included in the storage volume unless it is specified in the instructions for use that this volume is suitable for the storage of ice only;
c) the volume of spaces between the front stack(s) of the test package load (see 13.1.2) and the inner vertical surface of the door or any projection from the door where the horizontal distance between the front face o the stack(s) and the inner door surface or projection exceeds 15 mm;
d) the volume of all fixed components within the load limits;
of 32 ‘C, 38 C or 43 ‘C, as appropriate for the chmate class of the appliance (see clause 13), the running time shall be measured during a test period of at least 24 h, as specified in 8.7. Any suitable device may be used to record the running time of the refrigerating system.
8.6.1 ElectrIcally driven “three star” cabinets and freezers
Use shall be made of a synchronous clock that operates when the refrigerating system is running. When the current relay, inserted in series in the power supply circuit, is energized by the current flowing through it, it applies the voltage to the synchronous clock whose reading is recorded at the beginning and the end of the test. Running time is the difference between the two readings.
Alternatively, either the current or power may be plotted against time from a recording ammeter or wattmeter, and the running and idle periods computed from the graph.
8.6.2 Non-electrically driven three star” cabinets and freezers
Any suitable device may be used to record the running time of the refrigerating system.
8.7 Test period
The test period shall start at least 24 h after stable operating conditions have been attained.
For appliances with cyclic operation, the test period shall comprise a whole number of control cycles.
9 Testing the air-tightness of door or lid seal(s)
The purpose of this test is to ensure that the gasket(s) of the door(s) or lid(s) of the appliance adequately prevent(s) any abnormal ingress of the surrounding air.
9.1 Procedure
The ambient temperature shall be between + 16 ‘C and ÷ 32 C. The appliance shall be switched off and shall be in equilibrium with the ambient temperature before cartying out the test.
A strip of paper 50 mm wide and 008 mm thick and of suitable length shall be. inserted at any point of the seal, and the door or lid shall be closed normally on it.