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Drying apparatus

  • US 4,489,507 A
  • Filed: 08/18/1982
  • Issued: 12/25/1984
  • Est. Priority Date: 10/09/1981
  • Status: Expired due to Fees
First Claim
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1. A drying apparatus comprising:

  • an outer box sealed substantially air-tightly,drum means rotatably arranged in the outer box for housing materials to be dried,driving means for rotating the drum,air supply means for supplying air into the drum to remove moisture from the materials, andheat exchanger means for cooling discharged air which has taken away moisture from the material and has been discharged from the drum by bringing outside air into heat exchange relationship with the discharged air to remove moisture from the discharged air, the supply means supplying air discharged from the drum into the drum through the heat exchanger and supplying outside air into the heat exchanger, whereinsaid heat exchanger comprises at least one assembly including;

    (a) first, second and third plates, the first and third plates facing the second plate and separated therefrom by a predetermined dimension,(b) a pair of first opposing closing plates disposed between the first and second plates to form a first passage therebetween through which air discharged from the drum flows,(c) a pair of second opposing closing plates disposed between the second and third plates to form a second passage therebetween which extends at right angles to the first passage and through which the outside air flows, heat being exchanged through the second plate between the discharged air flowing in the first passage and the outside air flowing in the second passage,the assembly being so arranged in the outer box such that the first, second and third plates vertically extend parallel with one another and such that the first passage is inclined by a predetermined angle relative to the vertical direction to allow water drops, which form on the first and second plates by virtue of the heat exchange between the discharged air and outside air, to flow by gravity along the first and second plates opposite the airflow in said first passage, and wherein said apparatus further comprisesmeans arranged under the heat exchanger to receive the water drips.

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