Discharge pulsation damping apparatus for compressor

摘要

In a discharge pulsation damping apparatus of a compressor according to this invention, an expansion muffler 46 and a resonance muffler 58 each having a predetermined capacity are defined inside cylinder blocks 11 and 12 through partitions 59 and 60 so that the resonance muffler 58 is situated at a position higher than the expansion muffler 46 in a gravitational direction (vertical direction). The expansion muffler 46is connected to discharge chambers 38 and 39 and to an outlet 48, and both mufflers 46 and 58 are communicated by a communication passage 61 formed in the partitions 59and 60. The capacity of the resonance muffler 58, the open sectional area of the communication passage 61 and its passage length are set to values such that a pressure change capable of offsetting specific frequency components of the discharge pulsation inside the expansion muffler 46 can be generated inside the resonance muffler 58. The lubricant condensed inside the resonance muffler 58 is fed back into the expansion muffler 46 through the communication passage 61.