Drum washing machine, and spraying system and sealed window pad thereof

A spraying system of a drum washing machine, the drum washing machine comprising a box, an outer cylinder and an inner cylinder disposed in sequence from outside to inside, and a sealing window gasket being disposed between the box and the outer cylinder;

• the spraying system comprising a circulating pump, a water retaining structure and a plurality of water spraying pipes;
• a water inlet of the circulating pump opens into the outer cylinder, and a water outlet of the circulating pump communicates with the plurality of water spraying pipes respectively for pumping washing water in the outer cylinder to the plurality of water spraying pipes;
• each of the plurality of water spraying pipes is disposed on the sealing window gasket;
• the water retaining structure is disposed on an inner side of the sealing window gasket, and the water retaining structure is configured to be able to scatter washing water sprayed from each of the water spraying pipes and reflect the washing water into the inner cylinder,
• wherein the water retaining structure comprises a water retaining ring fixed to or formed on the sealing window gasket;
• and
• wherein the plurality of water spraying pipes are disposed at equal intervals surrounding the circumference of the sealing window gasket.