| 摘要 |
PURPOSE:To reduce vibration and noise and to effectively use the entire deodorizing filter by forming a space for diffusing the air passed through a dust collecting element between the deodorizing filter and element. CONSTITUTION:An outer frame 3 is fixed to the open edge of a ceiling board 2 dividing a ceiling space 1. A suction grill 6 free to open and close is arranged in the outer frame 3. A casing 18 opened downward is arranged in the space 1 in opposition to the grill 6. Plural dust collecting elements 20 are placed in the casing 18. A deodorizing filter 52 is set between the element 20 and an air suction source 14, and the filter 52 and elements integrally framed. A space 54 for diffusing the air passed through the element 20 is formed between the filter 52 and element 20. Consequently, vibration and noise are reduced, and the entire deodorizing filter is effectively used. |
