Refrigerated cabinet with one or more automatically closing doors, comprising a support frame, which defines a load compartment, and at least one door closing said load compartment, wherein said door is associated to said frame by hinging means (20; 30) which define a vertical rotation axis about which the door may rotate to move between a closed position and a predefined position of maximum opening, wherein said cabinet comprises an automatic closing system of said at least one door, wherein said automatic closing system comprises a hydropneumatic piston which is hinged - at its two opposite ends (40a, 40b) along a dynamic action axis thereof - respectively to the frame and to the door, wherein said hydropneumatic piston is hinged to the door in an offset position with respect to the rotation axis of the door by means of a lever extension which is integral in rotation with said door and extends from the door towards the inside of the cabinet, wherein the two hinging points of said hydropneumatic piston on the frame and on the lever extension are positioned with respect to the rotation axis in such a way that: - between said closed position and said position of maximum opening said hydropneumatic piston exerts a force on the lever extension along its dynamic action axis which always develops about the rotation axis an angular closing momentum of the door; and - the perpendicular distance between the dynamic action axis of the hydropneumatic piston and the rotation axis, which defines the arm of said angular momentum, decreases as the degree of angular opening of the door about the rotation axis increases, substantially up to nullify itself in said predetermined position of maximum opening so that in said predefined position of maximum opening the angular momentum is zero and the door can automatically stay still in equilibrium, the cylinder of said hydropneumatic piston has at least two longitudinal portions with different internal cross sections, wherein a first portion has a larger internal cross-section than the second portion so that the head of the stem of the piston at said first portion meets less resistance to sliding than that it meets at the second portion and can slide more quickly, said hydropneumatic piston being oriented with respect to the rotation axis in such a way that the head of the stem moves into said first portion when the door moves in the angular range of opening between said position of maximum opening and a first predefined intermediate angular position and in such a way that the head of the stem moves into said second portion when the door moves in the angular range of opening between a second intermediate predefined angular position and said closed position. - between said closed position and said position of maximum opening said hydropneumatic piston exerts a force on the lever extension along its dynamic action axis which always develops about the rotation axis an angular closing momentum of the door; and - the perpendicular distance between the dynamic action axis of the hydropneumatic piston and the rotation axis, which defines the arm of said angular momentum, decreases as the degree of angular opening of the door about the rotation axis increases, substantially up to nullify itself in said predetermined position of maximum opening so that in said predefined position of maximum opening the angular momentum is zero and the door can automatically stay still in equilibrium,