Apparatus for preserving and transporting fresh or frozen products, particularly for thermally insulated containers or the like

An apparatus for preserving and transporting fresh or frozen products, comprising at least one heat accumulator associated with a respective inner wall of a container, and comprising a plurality of longitudinally extended heat accumulation modules, each one of said modules comprising an enclosure that delimits a cavity adapted to contain a heat accumulation liquid, said cavity accommodating a heat exchanger that can be supplied with a heat transfer fluid, wherein said heat accumulation modules are mutually connected mechanically and thermally, and said enclosure has a first wall that faces said inner wall of said container and has a flat surface and a second wall that is opposite with respect to said first wall, is directed toward the internal compartment of said container, and has an at least partially ribbed surface, and further comprising a heat accumulator associated with a ceiling of said internal compartment, and two heat accumulators associated respectively with lateral walls of said internal compartment, said ceiling-mounted heat accumulator resting on said two wall-mounted heat accumulators and being connected mechanically and thermally to each one of said two wall-mounted heat accumulators by way of the interposition of plates that are welded to said heat accumulator that is associated with the ceiling of the internal compartment and respectively to each one of said two wall-mounted heat accumulators, said apparatus constituting a monolithic structure that cooperates structurally with the structure of said container.