F - Mech Eng,Light,Heat,Weapons – 26 – B
Patent
F - Mech Eng,Light,Heat,Weapons
26
B
341/32, 34/53
F26B 21/10 (2006.01) F26B 17/00 (2006.01)
Patent
CA 1086052
ABSTRACT OF THE DISCLOSURE Process and apparatus are provided for conditioning and preserv- ing living seeds. The grain drying apparatus is of the type having a plenum chamber formed in the lower part thereof and a gas-pervious floor forming the top of the plenum chamber. The improvement includes means for introducing atmospheric air in the plenum chamber; heating means for adding heat energy to the air in the plenum chamber, means for sensing the tempera- ture of air in the plenum chamber; means for sensing the temperature of the air in the top of the grain bin, the air being air exhausting from the grain bin; and differential temperature control means operating in response to the difference in temperature between the air in the plenum chamber and the air in the top of the grain bin for controlling the heating means by acti- vating the heating means when the result of the temperature in the plenum chamber minus the temperature in the top of the grain bin is a predeter- mined amount or less, and for deactivating the heating means when the tem- perature in the plenum chamber minus the temperature in the top of the grain bin is greater than the predetermined amount. The process involves placing the seeds in a closed environment; adding atmospheric air to one point in the closed environment; allowing air to exit from another point in the close environment; determining the temperature of air at the point of entry into the closed environment; determining the temperature of air at the point of exit from the closed environment; adding heat to air within the closed en- vironment only when the temperature difference between the entering air and the exiting air is greater than a predetermined amount; and controlling the amount of such heat always to maintaining the temperature of the exiting air cooler than the temperature of the entering air. The differential set- ting is selectively controllable to accomodate the hydroscopic properties of differing seeds and variations of seasonal temperatures and humidities.
238392
Marcus & Associates
Steffen Sylvester L.
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