Abstract: The present invention provides a refrigeration system for compact equipment, particularly of the type including electronic circuits and internally provided with a heat source to be cooled, said refrigeration system including a heat dissipation device mounted in the equipment and including a heat absorbing portion, which absorbs heat from the heat source, and a heat dissipation portion accessible from the outside of the equipment and which releases the heat to the exterior of the equipment; and an auxiliary refrigeration circuit external to the equipment and having: a heat absorbing means to be selectively coupled to the heat dissipation portion so as to receive therefrom, by conduction, at least part of the heat received from the heat source and dissipated by said heat dissipation portion; and a heat dissipation means which releases the heat to the environment external to the equipment.

Abstract: A refrigeration system includes a compressor; a condenser connected to a first inlet of a separator which has: a vapor outlet connected to the compressor and a liquid outlet connected to an evaporator; a selecting valve having: a first vapor inlet connected to the evaporator; a second vapor inlet connected to the separator; and a vapor outlet connected to the compressor, the selecting valve being operated to selectively and alternatively communicate its first and second vapor inlets with its vapor outlet, so as to allow the compressor to draw vapor from the separator and from the evaporator; and a control unit for controlling the operation of the selecting valve.