Abstract: By using separate cold and warm water connections in a washing machine, and by a laundry drum mounted to rotate horizontally and whose drum casing is provided, for the exchange of detergent solution between the laundry drum and the washing tub, with openings formed to act as scoops for the detergent solution in the washing tub, the laundry drum is filled with warm water in a simpler manner and without placing heat-sensitive textiles at risk. The warm water is conducted onto the drum casing from above at a shallow angle during the rotational phase and in a rotation direction. The warm water does not flow into the drum through the openings, but rather into the washing tub over the drum casing, and mixed with the previously introduced cold water there. Therefore, direct contact between the items being washed and the warm water supplied is avoided without complicated conduction systems.