Abstract: A self-contained, portable refrigeration unit having a construction arrangement which enables it to be compatible with several models, types and variations of refrigeratable compartments. This refrigeration unit is represented by a refrigeration module (1) capable of being removably fitted into a refrigeratable compartment, comprising a first housing (100) and a second housing (200) associated with each other. The first housing (100) is in contact with the inside of the refrigeratable compartment and the second housing (200) is in contact with the outside of the refrigeratable compartment, and in some embodiments of the present invention, the first housing (100) is capable of moving in relation to the second housing (200). The first housing (100) interfaces the refrigeration module (1) with the inside of the refrigeratable compartment. The second housing (200) interfaces the refrigeration module (1) with the outside of the refrigeratable compartment.