| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a delivery pulsation damping device of a compressor which can stably deny the target frequency component out of the delivery pulsation in a limited bigness. SOLUTION: An expansion muffler 46 and resonance muffler 58 having a prescribed volume are partitioned so that the resonance muffler 58 is a gravity direction upper side through partition walls 59, 60 in cylinder blocks 11, 12. The expansion muffler 46 is connected to delivery chambers 38, 39 and delivery port 48 and also both mufflers 46, 58 are communicated by the communication passage 61 formed on the partition walls 59, 60. The volume of the resonance muffler 58, the opening sectional area and passage length of the communication passage 61 are set to the value by which such pressure change that the specific frequency component of the delivery pulsation in the expansion muffler 46 is denied is generated in the resonance muffler 58. The lubricant condensed in the resonance muffler 58 is returned in the expansion muffler 46 through the communication passage 61.</p> |
