A washing and drying machine that is capable of performing heat exchange between outside air introduced into a cabinet and the circumferential surface of a tub so as to condense air used to dry laundry. No cooling water is used to condense air used to dry the laundry. Consumption of water is reduced,...http://www.google.com.au/patents/US7634925?utm_source=gb-gplus-sharePatent US7634925 - Washing and drying machine
