초록 ▼

In the method for drying moist agricultural products, the relative humidity of fresh air inducted from the environment is reduced by heating it so that the fresh air can take up moisture from the products to be dried. A portion of the thermal energy contained in the moist exhaust air is extracted by

In the method for drying moist agricultural products, the relative humidity of fresh air inducted from the environment is reduced by heating it so that the fresh air can take up moisture from the products to be dried. A portion of the thermal energy contained in the moist exhaust air is extracted by the evaporator of a heat pump before the moist exhaust air exits to the environment. At temperature below 10°C. a portion of the moist exhaust air is mixed with the cold fresh air before being heated by the condenser of the heat pump.

대표청구항 ▼

An apparatus for drying a moist material, especially an agricultural product, comprising: a bin for accommodating the material to be dried; an induction duct communicating with the ambient natural atmosphere and with said bin; a blower disposed within said induction duct for conducting fresh air int

An apparatus for drying a moist material, especially an agricultural product, comprising: a bin for accommodating the material to be dried; an induction duct communicating with the ambient natural atmosphere and with said bin; a blower disposed within said induction duct for conducting fresh air into said bin; an exhaust duct for exhausting used air from said bin and communicating with the ambient natural atmosphere and with said bin and having an end adjacent the ambient natural atmosphere; a heat pump having a condenser and an evaporator; said condenser being arranged within said induction duct; said evaporator being arranged at said end of said exhaust duct such that any predetermined quantity of said used air passing through said evaporator exhausts to the ambient natural atmosphere; an adjustable damper mounted in said exhaust duct between said bin and said evaporator; said condenser having an induction side; said exhaust duct having a region lying on said induction side of said condenser; and said adjustable damper operatively interconnecting said induction duct and said region of said exhaust duct.