Dual-zone dehydration tunnel
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United States of America Patent
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Mar 28, 2006
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N/A
app pub date -
May 23, 2005
filing date -
May 23, 2005
priority date (Note) -
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Abstract
A dehydration tunnel for fruits, vegetables, and other products reduces the vulnerability of the products to damage from carmelization and case hardening by dividing a row of product vessels into two segments, passing heated air simultaneously over both segments but in opposite directions, and advancing the row of vessels unidirectionally through the tunnel. Each vessel is thus exposed to a stream of heated air traversing the vessel in one direction, followed by a separate stream of heated air traversing the vessel in the opposite direction. This allows the tunnel to be operated at moderate temperatures and reduces the harmful temperature cycling of each vessel that is typical of tunnel dryers of the prior art.
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