ISO 5155:1995 pdf download – Household refrigerating appliances – Frozen food storage cabinets and food freezers – Characteristics and test methods
3.1.1 household frozen food storage cabinet (hereinafter referred to as “three star” cabinet): Insu- lated 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 de- scribed 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 compart- ments 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 4,5kg of test packages per 100 | of its storage vol- ume in 24 h, and in no case less than 2 kg, under the test conditions specified in clause 17, and is also suitable for 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.)
3.4.8 stable operating conditions: In the case of cyclic operation of a refrigerating system, stable op- erating conditions are deemed to be reached when, for each of the“M” packages, the temperatures at all corresponding points during successive operating cycles agree within±0,5K and there is no marked trend away from the mean temperature during a pe- riod of about 24 h. In the case of continuous operation of a refrigerating system, stable operating conditions are deemed to be reached when, although there may be a certain vari- ation in temperature, the increase or decrease in the temperature of all the“M” packages does not exceed 0,5 K during a period of 18 h.
3.6.1 compression-type “three star” cabinet or freezer: “Three star” cabinet or freezer in which re- frigeration 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 refriger- ating 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 refrigerat- ing 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, braz- ing or other means.