Open air ability and difunctional air source heat pump drying -machine of closed dehumidification

The utility model provides an open air ability and difunctional air source heat pump drying -machine of closed dehumidification, includes organism and heat pump set, heat pump set includes compressor,expansion valve, evaporimeter and condenser, the damper mechanism who still includes hot -blast forced draught blower, new trend draught fan, power -driven air valve, double -flow -passage heat exchanger and mode switch, the return air chamber on wind -guiding chamber and hot -blast air supply chamber upper portion and the environment air inlet chamber that is located the top. Damper mechanism includes L type slip combination air door and drive arrangement, the compressor is established at the host computer intracavity, the evaporimeter is established at the heat absorption intracavity, power-driven air valve sets up in heat absorption chamber environmental wind exit, and its outside is the new trend draught fan, the condenser sets up at exothermic intracavity. Combination damper mechanism design benefit, difunct