Fresh air handling unit with independent cold source

The utility model discloses a fresh air handling unit with an independent cold source, which comprises a controller, a fresh air handling unit cabinet and a variable frequency air conditioning outdoorunit, a primary filter, a refrigerating coil, a centrifugal fan, a heating coil, an auxiliary heating source and a fine filter are sequentially arranged in the fresh air unit cabinet body from an airinlet to an air outlet. A compressor and a condenser are arranged in the variable-frequency air conditioner outdoor unit, an inlet of the compressor is connected with an outlet of the refrigerating coil, an outlet of the compressor is connected with an inlet of the condenser and an inlet of the heating coil, and an outlet of the condenser is connected with an outlet of the heating coil. And a pipeline is connected with the inlet of the refrigeration coil pipe through a throttling device, so that a circulation loop in which a refrigerant flows is formed. The direct evaporation refrigeration coil pipe is adopted, the co