Water purifier having composite filter

A water purifier provided with a composite filter, comprising:

• a housing unit including a raw water receiving port through which raw water is received, a first purified water discharging port through which filtered first purified water is discharged, a second purified water receiving port through which externally filtered second purified water is received, a third purified water discharging port through which filtered third purified water is discharged, and a residential water discharging port through which residential water generated in a filtering process is discharged;
• and
• a filtering unit including a spiral wound type internal filter member disposed inside the housing unit to filter the raw water and generate the first purified water, an external filter member disposed outside the housing unit to filter the first purified water and generate the second purified water, and a post-treatment internal filter member disposed inside the housing unit to filter the second purified water and generate the third purified water,
• wherein the housing unit includes a head member including a first partition wall for preventing the raw water from being mixed with the second purified water, a second partition wall for preventing the second purified water from being mixed with the third purified water, a third partition wall for preventing the third purified water from being mixed with the residential water, and a fourth partition wall for preventing the residential water from being mixed with the first purified water, and a body member which extends from the head member and in which the filtering unit is disposed,
• the filtering unit includes a first upper cap member under which the spiral wound type internal filter member is fixedly disposed, and a second upper cap member disposed to be spaced a predetermined distance from an upper surface of the first upper cap member so that a residential water flow path through which the residential water discharged from the spiral wound type internal filter member flows is provided, and
• the first upper cap member includes a first through hole allowing an inside of the spiral wound type internal filter member to communicate with the residential water flow path so that the residential water discharged from the spiral wound type internal filter member disposed under the first upper cap member flows through the residential water flow path.

A water purifier provided with a composite filter, comprising:

• a housing unit including a raw water receiving port through which raw water is received, a first purified water discharging port through which filtered first purified water is discharged, an externally treated water receiving port through which externally treated water generated while treating the first purified water externally is received, a third purified water discharging port through which filtered third purified water is discharged, and a residential water discharging port through which residential water generated in a filtering process is discharged;
• and
• a filtering unit including a pre-treatment internal filter member disposed inside the housing unit to filter the raw water and generate the first purified water, an external treatment member disposed outside the housing unit to filter the first purified water and generate the externally treated water, a spiral wound type internal filter member disposed inside the housing unit to filter the externally treated water and generate the second purified water, and a post-treatment internal filter member disposed inside the housing unit to filter the second purified water and generate the third purified water and disposed to be stacked under the pre-treatment internal filter member,
• wherein the housing unit includes a head member including a first partition wall for preventing the raw water from being mixed with the first purified water, a second partition wall for preventing the first purified water from being mixed with the externally treated water, a third partition wall for preventing the externally treated water from being mixed with the residential water, and a fourth partition wall for preventing the third purified water from being mixed with the raw water, and a body member which extends from the head member and in which the filtering unit is disposed, and
• the filtering unit includes a first upper cap member under which the pre-treatment internal filter member disposed outward in a radial direction and the spiral wound type internal filter member disposed inward in the radial direction are disposed, and a second upper cap member under which the post-treatment internal filter member disposed outward in the radial direction is disposed and through which the spiral wound type internal filter member disposed inward in the radial direction is disposed to pass.