Nozzle structure, delivery apparatus and washing machine and additive delivery method

A method for delivering additives to a washing machine, wherein after an inlet water flow and delivered additives are mixed in a water supply path, a mixture is directly sprayed into a rotating washing drum,

• wherein, specific steps of the additive delivery process are as follows:
• step S1, delivering additives to the water supply path, until the delivery amount reaches a preset amount;
• step S2, feeding water into the water supply path;
• step S3, mixing inlet water and the additives in the water supply path to form a mixture;
• and
• step S4, directly spraying the mixture into the washing drum, with the washing drum simultaneously rotating around an axis,
• wherein, in the process of delivering additives, water flow flows in the water supply path specifically as follows:
• step S11, within the first set time t1, feeding water at a first set hydraulic pressure p1;
• step S12, within the second set time t2, feeding water at a second set hydraulic pressure p2;
• step S13, within the third set time t3, feeding water at a third set hydraulic pressure p3;
• wherein p1 is greater than p2, p3 is greater than p2;
• and t1 is greater than t2, and t3 is greater than t2.