Patent ID: 7409776

Claim:
A drying machine provided with a housing chamber which houses a matter to be dried, and executing a drying operation of the matter to be dried in the housing chamber, the drying machine comprising: an outer drum; an inner drum; heating means; dehumidifying means; blowing means; an air circulation path for discharging air heated by the heating means into the housing chamber by the blowing means, sending the air passed through the housing chamber into the dehumidifying means, and circulating the air in the heating means; said inner drum is disposed inside said outer drum and is constituted as said housing chamber, said air circulation path which extends from an air outlet of the housing chamber to an air inlet of the housing chamber, is defined by an air duct assembly connected to the outer drum in such a manner as to communicate with the housing chamber; and an outside air introduction port formed in the air duct assembly so that air outside of the air duct assembly is mixed into the air circulating in the air circulation path.