High concentrations of fine particles are increasingly being detected due to inflows from abroad and local emission sources in Korea. As most people spend about 90% of their time indoors, the use of indoor air cleaners has grown significantly as they are now thought to be essential items. In this study, the noise, power consumption, and clean air delivery rate (CADR) of commercial air cleaners were analyzed according to the structural shape of the air cleaners. Analyses were performed based on the experimental results of 249 cases for air cleaners certified by Korea Air Cleaning Association. The air cleaners with front inlet and upper outlet air flow direction, which currently account for the highest market share, were found to have the highest noise per CADR (dB(A)/(m3/min)). On the other hand, the air cleaners with the inlet and outlet air flow in the same horizontal direction were found to have lowest noise per CADR than other structures.

1. 서 론
2. 연구방법
    2.1 공기청정기의 형태별 구분
    2.2 공기청정기의 소음시험 규격
    2.3 공기청정기의 소음시험 기준의 변화
3. 연구의 결과
    3.1 소음의 청정화능력에 따른 형태별 상관관계
    3.2 소음의 시험기준에 따른 형태별 상관관계
    3.3 소비전력과 청정화능력 상관관계
4. 결 론

• 홍기정(한국기계연구원 환경기계연구실) | Keejung Hong (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 이건희(한국기계연구원 환경기계연구실) | Gunhee Lee (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea 1. 서 론 외부로부터 월경성)
• 박인용(한국기계연구원 환경기계연구실) | Inyong Park (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 김상복(한국기계연구원 환경기계연구실) | Sang Bok Kim (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 박대훈(한국기계연구원 환경기계연구실) | Dae Hoon Park (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 김학준(한국기계연구원 환경기계연구실) | Hak-Joon Kim (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 김용진(한국기계연구원 환경기계연구실) | Yong-Jin Kim (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 이예완(한국기계연구원 환경기계연구실) | Yeawan Lee (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 김진태(한국기계연구원 환경기계연구실) | Jin-Tae Kim (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 정상현(한국기계연구원 환경기계연구실) | Sang Hyun Jeong (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 심성훈(한국기계연구원 환경기계연구실) | Sunghoon Shim (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea)
• 한방우(한국기계연구원 환경기계연구실) | Bangwoo Han (Department of Environmental Machinery, Korea Institute of Machinery & Materials, Daejeon, Republic of Korea) Corresponding author