3. Essential parts

A typical sales refrigerator consists of three main components: the structure, the refrigeration units and the fittings.

Structure

It consists of a thermally insulated envelope, usually made up of "sandwich" panels with steel or composite facings, between which a rigid polyurethane insulating foam with an average density of 35 to 40 kg/m ³ is injected.

This thermally insulated enclosure forms the cabinet's carcass. This carcass is generally reinforced by internal and external metal parts, enabling the cabinet to withstand the numerous mechanical stresses caused by transport, installation and loading with foodstuffs without permanent deformation (figure 1...

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Essential parts

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Classification and schematics

References

(1) - RIGOT (G.) - Meubles et vitrines frigorifiques pour la distribution alimentaire. - 350 p. Pyc Édition France (1990). (Remerciements à l'Éditeur PYC Livres pour son autorisation d'en publier de larges extraits).
(2) - RIGOT (G.) - Load variations for...

Regulations

Order of May 9, 1995 (JO of May 16, 1995) published by AFNOR in the Maîtrise de la chaîne du froid (Cold chain control) compendium.

Standardization

Various technical standards apply to refrigerated display units:

international standards ISO series 5160..., ISO series 1992...
European standards EN 441 series...
French standards series D74...

These various standards can be obtained from AFNOR

Simulation software

Sales refrigeration units installed in food retail outlets are complex thermal and aeraulic machines, operating under variable ambient conditions. They constantly exchange air, heat and humidity with the store's internal environment. The cold production needed to maintain their temperature is cyclically interrupted by defrosting operations. The temperature of the goods on display will be strongly affected by these...