| 摘要 |
PURPOSE:To aim at preventing an overfeeding of oil as well as lowering an operating input under low ambient temperature conditions in particular, by connecting a crankshaft and an oil feed pipe with a temperature sensor member and varying the amount of immersion of the oil feed pipe into lubricating oil. CONSTITUTION:AT the inside of a closed casing 1a of a compressor body 1, an oil feed pipe 4 is set up in a certain way immersing its lower end into lubricating oil 2 and its upper end is inserted slidably into a cylindrical part 5 composed of a spot-facing at the lower end of a crankshaft 3. In addition, the crankshaft 3 and the oil feed pipe 4 are both connected via a double ring bellows 6 having an outer part 6a and an inner part 6b, and heat expansive gas is sealed inside the bellows 6. In this way, when the compressor 1 is in low ambient temperature and light load, for example, the internal temperature drops as well, so that the bellows 6 contracts and thereby its height lowers simultaneously. In consequence, the amount of immersion of the oil feed pipe 4 into the undersurface of lubricating oil 2 becomes decreased; the compressor operating input can be lessened due to the decrement of a slippage friction loss (stirring resistance) in both 4 and 2. |
