A - Human Necessities – 23 – B
Patent
A - Human Necessities
23
B
98/13, 48/24
A23B 7/148 (2006.01) A01F 25/00 (2006.01)
Patent
CA 1219127
ABSTRACT OF THE DISCLOSURE: A method and apparatus for reducing the oxygen concentration of air within a preservation room such as the ones used for the conservation of fruits or vegetables. The apparatus comprises a compressor for pumping the air from the preservation room and circulating it through the apparatus, a device for heating the pumped air at a predetermined temperature, a device for mixing an inflammable gas with the air heated at the predetermined temperature, a catalytic combustion chamber wherein the gas is burnt with the oxygen of the heated air thereby producing air having a reduced oxygen concentration, and a spray water cooler for cooling the air with a reduced oxygen concentration before returning it back to the preservation room. The apparatus may also be provided with thermocouples for measuring the temperatures of the heated air and of the air with a reduced oxygen concentration at the outlet of the catalytic chamber and a control circuit for controlling the mixing and heating devices as a function of the two measured tempera- tures. The apparatus may also be provided with a heat exchanger for recovering the heat from the combustion chamber and using it to preheat the air before heating it.
416560
Les Industries Fepac Ltd.
Robic Robic & Associes/associates
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