| 摘要 |
<p>PURPOSE: To prevent a resonant sound of a muffler from being produced by disposing a secondary muffler having a primary resonant frequency 2/3 times that of the muffler between the muffler demonstrating resonance. CONSTITUTION: A muffler 6 serving to prevent high temperature freezer oil from returning to an evaporator 4 from a compressor 1 for a refrigerant circuit is disposed between the compressor 1 and the evaporator 4 together with an accumulator 5. A secondary muffler 9 having a first resonant frequency 2/3 times a primary resonant frequency of the muffler 6 is disposed between the compressor 1 and the muffler 6 through connection pipes 7, 8. Hereby, with the muffler and the second muffler pressure pulsation of a resonant frequency component can be attenuated, and hence a resonant sound of the muffler can be prevented from being occurred.</p> |
