Patent ID: 8112904

Claim:
A drum-type washer/dryer which incorporates a drum into which laundry is put and comprises: a water-receiving tub receiving water discharged from the laundry in the drum; a blowhole provided in the water-receiving tub so that air is supplied to an inner space of the drum therethrough; a duct connected to the blowhole; an air circulation passage having a start and an end thereof in the inner space of the drum and formed into a loop, the air circulation passage including the duct; a blower drawing air from the inner space of the drum and circulating the air in such a direction that the air is returned through the duct and the blowhole in turn into the inner space of the drum; a condenser provided in the circulation passage so as to be located upstream of the duct relative to the blowhole; an evaporator provided in the circulation passage so as to be located upstream of the condenser; and a compressor causing a refrigerant to flow into the evaporator and the condenser, characterized in that the duct includes a backflow preventing portion which serves as a resistance preventing backflow of a bubble when the bubble flows back from the inner space of the drum through the blowhole into an interior of the drum, the backflow preventing portion has a smaller cross-sectional area than a remaining portion of the duct, the cross-sectional area being obtained by fracturing the duct along a section line perpendicular to a flowing direction of the air in the duct.