Patent ID: 7228647

Claim:
A drying machine comprising: a drum disposed in a cabinet to receive laundry; an inlet channel configured to allow external air to be introduced into the drum therethrough; a heater configured to heat air introduced into the inlet channel; an outlet channel configured to allow air in the drum to be discharged out of the cabinet therethrough; a circulating channel connected between the outlet channel and the heater such that at least a portion of air flowing through the outlet channel is introduced into the heater through the circulating channel before being discharged out of the cabinet and circulated into the drum; and a condenser configured to condense the circulated air such that a humidity of air passing through the circulating channel is decreased, said condenser comprising first channel parts that allow the air introduced into the circulating channel to flow therethrough, and second channel parts that allow external air, necessary to take heat away from the air passing through the first channel parts, to flow therethrough.