
Types of Reefers
By types of transport, the reefers are divided into:- Refrigerated road transport − refrigerated truck and trailers equipped with the isothermal (insulated) vans;
- Reefer containers − marine reefers for transportation on the sea vessels; also used for a stationary storage;
- Refrigerated wagons − covered railway wagons intended for the carriage of perishable goods over long distances;
- Refriger vessels − special cargo ships equipped with refrigerated cargo holds. As a rule, they are used on fishing vessels to freeze and store the catch.

Temperature control Refrigerator Cargoes box at dockyard[/caption] On all these types of transport, as well as in warehouses, the refrigerated containers equipped with an autonomous refrigeration unit can be used. The refrigerated road transport is the most universal option for the delivery of the perishable goods. Thermally insulated cargo bodies on this transport are placed on:
- chassis of the car itself (cold storage car);
- on a semi-trailer (refrigerated semi-trailer) or
- on a trailer.

Classes of reefers
Depending on the temperature maintained, the cargo refrigerator can be referred to one of these classes:- ‘A’ (+12 ... 0 °C, +53 ... +32 °F)
- ‘B’ (+12 ... -10 °C, +53 ... +14 °F)
- ‘C’ (+12 ... -20 °C, +53 ... -4°F)
- ‘D’ (not above +2 °C, +36 °F)
- ‘E’ (not higher than -10 °C, +14 °F)
- ‘F’ (not higher than -20 °C, -4°F)
- FNA − for the normal (with normal body thermal insulation) of Class ‘A’ reefers;
- FRA, FRB or FRC − for the reinforced (with reinforced body thermal insulation) Reefers of Class ‘A’, ‘B’ or ‘C’, respectively.
Construction of reefers
Walls of the refrigerated trailers, as a rule, are made of the monolithic sandwich panels (thickness 4-8 cm). The joints of the panels are sealed, and then masked and reinforced with the special framing elements to avoid the formation of thermal bridges.
A reliable thermal insulation of the doors is provided by a wear-resistant elastic rubber profile. As the covering of refrigerated vehicles, it is applied by:
- galvanized (coated) sheet steel;
- laminated plywood;
- plywood reinforced with plastic;
- aluminum coated plate;
- stainless glossy steel.

Long lorry vehicle for cooling and freezing[/caption] For the flooring it can be used:
- corrugated steel;
- galvanized steel;
- corrugated aluminum;
- polymer filling (including with abrasive).