To provide a solar heat air heat collector having a low radiation loss and a high heat collecting efficiency.
A heat collecting plate 4 is disposed between a transparent plate 2 and a rear plate 10. A front side air path 11 and a rear side air path 12 are respectively provided between the transparent plate 2 and the heat collecting plate 4 and between the rear plate 10 and the heat collecting plate 4. Air is made to flow from the rear side air path 12 to the front side air path 11 so that the introduced air having a low temperature is first heated by the rear side air path 12 of the heat collecting plate 4 on a low temperature side, and then is further heated by the front side air path 11 on a high temperature side. Because the air just after getting into contact with a rear face of an outer case has a comparatively low temperature, radiation loss on the rear face of the box is small, and because the air is finally heated by the front side air path 11 on the high temperature side, a high temperature rise value can be obtained to raise the heat collecting efficiency.
WATANABE TAKEJI
KONDO RYUTA
NISHIYAMA YOSHITSUGU
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