Composite filter and water purifier including same

A composite filter, comprising:

• a housing part which is provided with a raw water inlet port through which raw water is introduced, a purified water outlet port through which filtered purified water is discharged, and a washing water discharge port through which washing water is discharged;
• and
• a filtering unit which is provided with a first filter member that filters the raw water to produce first purified water, and a second filter member that filters the first purified water to produce second purified water and is stacked on top of the first filter member,
• wherein the housing part comprises:
• a head member which is provided with a first partition wall that prevents the second purified water and the washing water from mixing, and a second partition wall that prevents the raw water and the washing water from mixing;
• and
• a case member which extends from the head member and has the filtering unit disposed therein, and
• wherein the filtering unit comprises:
• a first upper cap member wherein the first filter member is disposed below;
• a second upper cap member wherein the first upper cap member is disposed below, and has a hole through which the washing water moves;
• a third upper cap member wherein the second filter member is disposed below;
• a fourth upper cap member wherein the third upper cap member is disposed below;
• and
• a fifth upper cap member wherein the fourth upper cap member is disposed below.

A composite filter, comprising:

• a housing part which is provided with a raw water inlet port through which raw water is introduced, a purified water outlet port through which filtered purified water is discharged, and a washing water discharge port through which washing water is discharged;
• and
• a filtering unit which is provided with a first filter member that filters the raw water to produce first purified water, and a second filter member that filters the first purified water to produce second purified water and is stacked below the first filter member,
• wherein the housing part comprises:
• a head member which is provided with a first partition wall that prevents the raw water and the washing water from mixing, and a second partition wall that prevents the purified water and the washing water from mixing;
• and
• a case member which extends from the head member and has the filtering unit disposed therein, and
• wherein the filtering unit comprises:
• a first body member which surrounds the first filter member;
• a first upper cap member wherein the first filter member is disposed below;
• a second upper cap member wherein the first upper cap member is disposed below, and the first body member is disposed below;
• a first lower cap member wherein the first filter member is disposed above and penetrates the second filter member;
• a second body member which surrounds the second filter member;
• and
• a third upper cap member wherein the second filter member is disposed below.