Filter element assembly and water purifier

A filter element assembly, comprising:

• a first housing having a first water port, a second water port, a third water port, and a fourth water port, wherein the third water port is spaced apart from the fourth water port;
• a first filter element arranged inside the first housing, a first water channel and a second water channel being provided at an outer periphery and an inner periphery of the first filter element respectively, wherein the first water channel is communicated with the first water port, and the second water channel is communicated with the second water port;
• a second housing arranged inside the first housing and arranged at an end of the first filter element that is away from the third water port and the fourth water port, the second housing having a fifth sixth water port and a sixth water port that are spaced apart from each other;
• a second filter element arranged inside the second housing, a third water channel and a fourth water channel being provided at an outer periphery and an inner periphery of the second filter element respectively, wherein the third water channel is communicated with the fifth water port, and the fourth water channel is communicated with the sixth water port;
• a first pipeline connected between the third water port and the fifth water port and arranged in the second water channel;
• and
• a second pipeline connected between the fourth water port and the sixth water port, wherein the second pipeline is arranged within the second water channel and is spaced apart from the first pipeline.