| 摘要 |
PROBLEM TO BE SOLVED: To suppress energy loss of supply air and obtain cleaning/circulating effects of indoor air by circulation by supplying outdoor air after heat exchange between outdoor air after cleaning and indoor air. SOLUTION: The multi-functional air supply fan comprises an air supply fan 13 attached on a duct formed in a wall 3 separating an indoor space 1 and an outdoor space 2 for force-feeding outdoor air (a), a circulation fan 14 for circulating indoor air (b), a heat exchanging unit 15 for exchanging heat between the outdoor air force-fed and the indoor air (a) circulated, an outdoor cleaning filter 16 for cleaning the outdoor air (a) and an indoor air cleaning filter 17 for cleaning the indoor air (b). |
