| 摘要 |
A drying apparatus includes a drum rotatably arranged in an outer box and housing therein materials to be dried. An air supply device supplies heated air into the drum, and a heat exchanger cools air discharged from the drum by means of air taken from outside of the outer box to remove moisture from air discharged. The heat exchanger is formed by piling plural plates with plural pairs of first and second closing plates interposed therebetween and is provided with plural first and second passages which are arranged alternately and perpendicularly to each other. The heat exchanger is so arranged that the first passages are slanted inward the outer box by 45 degrees relative to the vertical direction.
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