| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling device for preventing the stay of a lubricating oil in a cooler constituting a refrigerating cycle for the cooling device, a heat radiation pipe for compatibly serving a condenser and various pipes including a suction pipe, improving the heat radiation efficiency of the condenser, the heat absorbing efficiency of the cooler, the heat exchanging efficiency of the suction pipe and the durability of a compressor and requiring less power demand and lower cost. SOLUTION: The cooling device comprises the compressor, the cooler and the heat radiation pipe turned around several times between the outlet of the compressor and the inlet of the cooler for compatibly serving the condenser, all of which are connected to one another. An inner diameter A of a lower end turned-around portion 11a of the heat radiation pipe 11 is formed smaller than an inner diameter B of each of a straight pipe portion 11b and an upper end turned-around portion 11d of the heat radiation pipe 11 (A<B).
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