| 摘要 |
PURPOSE:To improve compression efficiency by lowering the gas temperature in a casing by lowering the oil temperature by improving the heat exchange efficiency between a sealed container and oil by temporarily accumulating oil by forming a groove part onto the inner wall of the sealed container. CONSTITUTION:A groove part 10 is formed onto the inner wall of a sealed container 1 so that the oil which drops after cooling the cylinderhead 9 of a compressor mechanism part 2 is received. Plural stages of said groove parts are arranged in the vertical direction, and the width of the groove part 10 is made wider in the lower part. The oil accumulated into the upper groove part 10 successively overflows, and flows into the lower groove part, cooled during the flow on the inner wall of the sealed container 1.
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