Abstract
Air conditioner has become the necessities to create a comfortable living environment. On the other hand, it has been required reduction of noise and vibration in development of room air conditioner, because noise of outdoor unit becomes issues in an overcrowded area. There are four noises leading cause of noise given off by air conditioner. This study focuses attention on solid-born sound that is generated with frequency range of 100-500Hz. When it comes to this noise, installation of the refrigerant pipes, one of the transfer paths of vibration that contributes to noise, becomes an issue. However noise and vibration widely vary due to installation, solution that quantitatively reduces noise and vibration is not still presented. For such a problem, it is expected that it can effectively reduce noise and vibration by applying Transfer Path Analysis (TPA) that is applied to identify the path to countermeasure from among transfer paths that exist a lot from vibratory source to output points. Therefore, in this study, we apply TPA refrigerant pipes that issue is raised at the moment among the pipes existing in an outdoor unit. We perform structural modification of controversial pipe and try to reduce target vibration response.
