| 摘要 |
<p>A coaxial ventilator (20) exchanges atmosphere between parts of a building (22) that are at differing heights. The coaxial ventilator (20) includes an outer conduit (24) that extends from an upper end (42) thereof downward to a lower end (44) thereof. The outer conduit (24) surrounds an inner conduit (62) that extends substantially the entire length of the outer conduit (24). Both the outer and inner conduits (24, 62) are open at their respective upper ends (42, 66) and lower ends (44, 68). Temperatures of atmosphere both surrounding and within the outer conduit (24) and the inner conduit (62) induce an exchange of atmosphere between the coaxial ventilator (20) and surrounding atmosphere. 62 t-VIf24 63,64c 000 o 38 00o0o 36 63,64a - 20 FIG. I 72-- t 32 63,64b -, OOA:' 62- r00 34 52a 24 t56a 63,64c /6 56b 52b __4 6 442</p> |
