Humidity responsive control for dryers

Details Humidity responsive control for dryers Humidity responsive control for dryers

1979-05-25

1980-09-09

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

With apparatus using centrifugal force

34 54, 34 85, 34 89, 73 29, 734215R, F26B 2108

Patent

active

042210585

ABSTRACT:
An improved control system, especially for dryers, adapted to sample dryer air, in a sample taking circuit, determine the moisture content of said air, and control the flow of make-up air to the dryer and exhaust air from the dryer in response to said moisture content. Means are provided for reducing the temperature of the dryer air in the sample taking circuit to one that can be handled by a signal producing means responsive to sample air moisture content. The flow of dryer air through said circuit is maintained by an aspirator and compressor combination, the compressor being adapted to provide purge air to the circuit before and/or after periods of sample taking.

REFERENCES:
patent: 1711574 (1929-05-01), Miller
patent: 2643464 (1953-06-01), Hadady
patent: 2920398 (1960-01-01), Liljenstrom
patent: 2987918 (1961-06-01), Hanna
patent: 3110442 (1963-11-01), Taylor
patent: 3259995 (1966-07-01), Powischill
patent: 3495463 (1970-02-01), Howell
patent: 4094187 (1978-06-01), Navarre, Jr.

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