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    • 4. 发明申请
    • METHOD AND SYSTEM FOR SUPPLYING DRYING AIR
    • WO2021185984A1
    • 2021-09-23
    • PCT/EP2021/056988
    • 2021-03-18
    • SAMSTER AB
    • SAMUELSSON, KentSTEIER, Vilhelm
    • F26B21/08F26B23/00F26B3/04F26B9/06
    • A method of and a system for drying a material in a drying chamber (too), the method comprising the steps of; - supplying air to an air-drying system (114, 214, 314) which air-drying system comprises; an air inlet (116), a first heat exchanger (204) having a first warm side (204a) and a first cold side (204b); a heat pump (318) comprising an evaporator (206), a condenser (208) and a compressor (316) arranged to provide a first heat transfer from the evaporator (206) to the condenser (208); an air outlet (118) arranged to supply the air to the drying chamber (100); a second heat exchanger (210) having a second warm side (210a) and a second cold side (210b), the second cold side (210b) being connected a heat transfer medium capable of absorbing heat from the second warm side (210a) through a second heat transfer, the second heat exchanger (210) being arranged downstream of the first cold (204b) side and upstream of the air outlet (118); and an air flow device (202) arranged to control the air flow rate from the air inlet (116) to the air outlet (118) for supplying air into a drying chamber (100); - passing the air, by means of the air flow device (202), from the air inlet (116), sequentially through the first warm side (204a) of the first heat exchanger (204), the evaporator (206), the first cold side (204b) of the first heat exchanger (204), the condenser (208) and the air outlet (118) and further passing the air through the second warm side (210a) of the second heat exchanger (210); and - alternately heating and cooling the air passing the air-drying system (114, 214, 314), wherein heating the air comprises promoting the first heat transfer while supressing the second heat transfer, and cooling the air comprises supressing the first heat transfer while promoting the second air transfer.