Abstract: A hub, to which three blades receiving wind are fixed and extending in a radial direction of the hub at equal intervals. The hub is arranged in a spindle-shaped boss having a rectification function. A cylindrical frame is arranged on the leeward side of the boss to separate an outer peripheral surface of a generator from outside air. An outer surface of the boss, which rotates with the blades, and an outer peripheral surface of the frame form a continuous plane. On the outer peripheral surface of the frame, fins, which outwardly protrude in a radial direction of the frame and extend in an axial direction of the frame, are arranged in a circumferential direction of the frame at equal intervals. After the outside air rotates the blades, the outside air passes along the fins. Therefore, heat, which is generated in the generator and is transferred to the fins through the frame by conduction, is dissipated to the outside air.

Abstract: A hub, to which three blades 3 receiving wind are fixed so as to extend in a radial direction of the hub at equal intervals, is arranged in a spindle-shaped boss having a rectification function. A cylindrical frame is arranged on the leeward side of the boss to separate an outer peripheral surface of a generator from outside air. An outer surface of the boss, which rotates with the blades, and an outer peripheral surface of the frame form a continuous plane. On the outer peripheral surface of the frame, a plurality of fins, which are outwardly protruded in a radial direction of the frame and extend in an axial direction of the frame, are arranged in a circle-circumferential direction of the frame at equal intervals. After the outside air gives a rotational force to the blades, the outside air passes along the fins. Therefore, heat, which is generated in the generator and is transferred to the fins through the frame by conduction, is dissipated to the outside air.

Abstract: The equipment of the present invention has a plurality of storing cases in which the blood is stored and which is refrigerated by respectively provided Stirling refrigerator, in a keeping-cool room kept at a low temperature. According to the present invention, it is possible to obtain a very low temperature condition less than the recrystallization temperature of the ice in each of the storing cases, refrigerating each storing case wherein the blood is stored by each Stirling refrigerator with high performance coefficient in a very low temperature. A very low temperature condition is realized at a low cost and a high recovery is obtained, which results in that a great deal of blood is stored stably. Furthermore, taking blood in and out is carried out automatically and without the necessity of the operator's entering the keeping-cool room, by providing means for putting the blood in each storing case and taking it out from each storing case and performing the remote control of this means.