Water purifier with a composite filter

Abstract

The present invention relates to a water purifier equipped with a composite filter, and more particularly to a water purifier equipped with a composite filter integrated with a reverse osmosis filter member (spiral filter member) so that raw water can be input and purified water can be output, as well as domestic water can be discharged.

Description

[Technical Field]

[0001] The present invention relates to a water purifier equipped with a composite filter, and more particularly to a water purifier equipped with a composite filter integrated with a reverse osmosis filter element (spiral filter element), which allows raw water to be input and purified water to be output, as well as domestic water to be discharged. [Background technology]

[0002] Generally, a water purifier is a device that filters raw water to produce drinkable purified water for the user. Such a water purifier uses a combination of several filters to filter the raw water. However, when using multiple filters in combination, the internal layout of the water purifier becomes complicated, and the volume occupied by the filters increases, resulting in an increase in the overall volume of the water purifier. To solve this problem, a composite filter, in which each filter is integrated, is sometimes used.

[0003] Korean Patent Publication No. 2003-0096867 by Woongjin Coway Co., Ltd. discloses a composite filter for a water purifier that filters raw water. The composite filter includes an outer sediment filter, a first filter section with overlapping ACF filters, a second filter section with flat ACF filters, and a third filter section with an AC filter and a UF filter. The composite filter is manufactured by stacking the first, second, and third filter sections sequentially inside a housing and then fusing the caps. However, this configuration requires a lot of time to stack the filter sections, resulting in reduced workability. Furthermore, since the inlet through which raw water enters is located at the bottom and the outlet through which purified water exits is located at the top, tubes through which raw water and purified water flow are located at the top and bottom of the composite filter, respectively, making installation and replacement of the composite filter difficult and reducing space efficiency due to the complex layout.

[0004] Korean Patent Publication No. 2009-0043783 by Woongjin Coway Co., Ltd. discloses a composite filter device for a water purifier. This composite filter device is manufactured by sequentially stacking a membrane filter, a silver nanofilter, and an activated carbon filter inside a case and then fusing a cap. However, this construction requires a lot of time to stack each filter, reducing workability. Furthermore, since the inlet through which raw water enters is located at the bottom and the outlet through which purified water exits is located at the top, tubes through which raw water and purified water flow are located at the top and bottom of the composite filter, respectively, making installation and replacement of the composite filter difficult and reducing space efficiency due to the complex layout.

[0005] The water purifier disclosed in Korean Patent Publication No. 2021-0040502 by Coway Co., Ltd. includes a composite filter for filtering raw water. The composite filter includes a first filter material and a second filter material, each of which may be a single filter element selected from known filter materials such as a sediment filter, a pre-carbon filter, a post-carbon filter, an antibacterial filter, and various functional filters. However, this composite filter does not include a flow path for the concentrated domestic water discharged through the reverse osmosis filter, which poses a problem in that it cannot be integrated with the reverse osmosis filter for use as a composite filter.

[0006] A conventional composite filter is disclosed in Chinese Utility Model Publication No. 212151806 of GUANGDONG SHUIHUDUN HEALTH TECH CO LTD, which discloses a configuration in which a pre-treatment filter and a post-treatment filter are stacked inside an RO filter. However, because this composite filter has a pre-treatment filter and a post-treatment filter stacked inside the RO filter, there is a problem in that RO filters with a general structure (a structure in which a membrane is wrapped around a central tube) cannot be used.

[0007] MIDEA GROUP CO LTD's China Registered Utility Model Publication No. 209307056 discloses a conventional composite filter in which a PAC filter and a carbon filter are stacked inside an RO filter. However, because the PAC filter and the carbon filter are stacked inside the RO filter, this composite filter also has the problem of being unable to use RO filters with a general structure (a structure in which a membrane is wrapped around a central tube). [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Patent Publication No. 2003-0096867 [Patent Document 2] Korean Patent Publication No. 2009-0043783 [Patent Document 3] Korean Patent Publication No. 2021-0040502 [Patent Document 4] China Registered Utility Model Publication No. 212151806 [Patent Document 5] China Registered Utility Model Publication No. 209307056 Summary of the Invention [Problem to be solved by the invention]

[0009] In order to solve the above problems, a water purifier equipped with a composite filter according to one aspect of the present invention is configured by integrating reverse osmosis filter members to form a composite filter that can receive raw water, output purified water, and discharge domestic water. However, each filter is modularized using a first module equipped with a pre-treatment filter member and a reverse osmosis filter member, and a second module equipped with a post-treatment filter member. The composite filter is configured by stacking the first and second modules, thereby improving manufacturability. Since three filter members are integrated into the housing, the water purifier can be made smaller and easier to replace. Furthermore, raw water entering the upper part of the housing moves to the first module through the outside of the guide member, so it is not mixed with purified water passing through the inside of the second module, ensuring stable operation of the water purifier. Furthermore, the head member of the housing is provided with first and second partition walls to form independent flow paths that prevent the raw water, purified water, and domestic water from mixing. This allows the tubes through which the raw water, purified water, and domestic water flow to be concentrated at the top of the composite filter, improving flexibility in layout design of other parts.

[0010] In a water purifier equipped with a composite filter according to one embodiment of the present invention, domestic water discharged outside the first module flows through the domestic water flow path provided between the guide upper cap and the guide lower cap, so that the raw water flowing outside the guide member is not mixed with the purified water flowing inside the second module, thereby improving the operational stability of the water purifier.

[0011] The water purifier equipped with the composite filter according to one embodiment of the present invention aims to improve the operational stability of the water purifier by disposing the first partition wall body to extend in the axial direction along the upward upper guide, so that the discharged domestic water does not mix with the incoming raw water.

[0012] In a water purifier equipped with a composite filter according to one embodiment of the present invention, after domestic water is discharged outside the first module, it flows through the domestic water flow path provided in the guide member, preventing it from mixing with the purified water flowing inside the first module and the second module, thereby improving the operational stability of the water purifier.

[0013] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the guide upper cap is extended to the second upper cap member, so that raw water flowing toward the first module can be prevented from flowing inside the guide upper cap, and domestic water discharged outside the first module can be prevented from flowing outside the guide upper cap, thereby improving the operational stability of the water purifier.

[0014] In a water purifier equipped with a composite filter according to an embodiment of the present invention, a reverse osmosis filter member is arranged spirally around a central tube, and a second through-hole is formed so that a second purified water flows into a second purified water flow path provided therein, thereby stably maintaining the second purified water flow path and ensuring operational reliability through a smooth flow of the second purified water. The central tube is arranged to penetrate the center of the guide lower cap, so that the second purified water flows into the guide lower cap, preventing it from mixing with discharged domestic water, thereby improving the operational stability of the water purifier.

[0015] A water purifier equipped with a composite filter according to one embodiment of the present invention aims to improve the operational stability of the water purifier by configuring the third lower cap member to be spaced a certain distance from the upper surface of the guide lower cap, thereby forming a second purified water flow path between the third lower cap member and the guide lower cap, and allowing the second purified water to flow smoothly.

[0016] The water purifier equipped with the composite filter according to one embodiment of the present invention aims to improve the structural stability and operational stability of the water purifier by inserting the central tube into a support surface formed on the third lower cap member that protrudes upward, thereby enabling the central tube to be stably fixed and allowing the second purified water to flow stably.

[0017] A water purifier equipped with a composite filter according to an embodiment of the present invention aims to improve the operational stability of the water purifier by stably flowing the second purified water by switching the flow direction of the second purified water that flows in the axial direction through the central tube to the radial direction by the switching surface.

[0018] A water purifier equipped with a composite filter according to one embodiment of the present invention has first support protrusions formed around the outer periphery of the third lower cap member, protruding radially outward, so that the third lower cap member supports the inner surface of the guide lower cap, thereby securing a second purified water flow path so that the second purified water flows around the third lower cap member. The first support protrusions are arranged at equal intervals, so that the second purified water can move evenly in the circumferential direction of the third lower cap member, thereby improving the flow of the second purified water and thereby improving product reliability.

[0019] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the second partition wall is arranged to extend in the axial direction along the third upward guide, thereby preventing the third purified water from being mixed with the discharged domestic water, thereby improving the operational stability of the water purifier.

[0020] A water purifier equipped with a composite filter according to an embodiment of the present invention can control the flow of raw water, purified water, and domestic water by controlling the valve unit through a control unit, and aims to improve product reliability by effectively preventing backflow of these fluids.

[0021] According to another aspect of the present invention, a water purifier equipped with a composite filter is capable of not only inputting raw water and outputting purified water, but also outputting domestic water. The composite filter is constructed by integrating reverse osmosis filter members, modularizing each filter into a first module having a pre-treatment filter member and a reverse osmosis filter member and a second module having a post-treatment filter member, and stacking the first and second modules to construct the composite filter. This improves manufacturability. Since three filter members are integrated into the housing, the water purifier is easily miniaturized and replaceable. Furthermore, a discharge tube member is disposed through the center of the first module so that third purified water generated from the second module disposed below can be discharged to the outside, preventing the third purified water from mixing with the second purified water, ensuring operational stability of the water purifier. Furthermore, the head member of the housing is provided with first and second partition walls to form independent flow paths that prevent the raw water, purified water, and domestic water from mixing. This allows the tubes through which the raw water, purified water, and domestic water flow to be concentrated at the top of the composite filter, improving flexibility in layout design of other parts.

[0022] In a water purifier equipped with a composite filter according to another embodiment of the present invention, a reverse osmosis filter member is arranged spirally around a central tube, a first through-hole is formed so that a second purified water flows into a second purified water flow path provided therein, and a discharge tube member inserted through the center of the central tube is spaced a certain distance from the central tube, thereby stably maintaining the second purified water flow path and improving operational reliability through a smooth flow of the second purified water.

[0023] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the second partition wall is arranged to extend in the axial direction along the discharge tube member, thereby effectively preventing the third purified water from being mixed with the discharged domestic water, thereby improving the operational stability of the water purifier.

[0024] The water purifier equipped with the composite filter according to another embodiment of the present invention aims to improve the operational stability of the water purifier by discharging the discharged domestic water to the outside through the domestic water flow path formed between the first upward guide provided on the first upper cap member and the central tube, so that the discharged domestic water is not mixed with the raw water or the first purified water.

[0025] A water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve the operational stability of the water purifier by preventing the discharged domestic water from mixing with the incoming raw water, as the first partition wall is extended in the axial direction along the first upward guide.

[0026] The water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve workability by enabling subassembly of the first module through the second upper cap member and the second lower cap member, and to improve durability of the water purifier by enabling stable fixation of the first upper cap member.

[0027] The water purifier equipped with the composite filter according to another embodiment of the present invention aims to improve the structural stability by stably connecting the second upper cap member and the second lower cap member through the connecting tube, and to improve the operational stability of the water purifier by allowing the first purified water to flow smoothly through the second through-hole formed in the connecting tube.

[0028] A water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve workability by enabling subassembly of the second module through the third upper cap member and the third lower cap member, and by stably forming a third purified water flow path during stacking of the first module and the second module because the discharge tube member is extended upward from the third upper cap member.

[0029] A water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve the operational stability of the water purifier by arranging a third upper cap member at a predetermined distance from the lower surface of the second lower cap member, thereby forming a second purified water flow path between the third upper cap member and the second lower cap member, and allowing the second purified water to flow smoothly.

[0030] A water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve workability by being configured to be easily assembled by inserting the second module into a second downward lower guide formed on a second lower cap member to stack the first module and the second module.

[0031] A water purifier equipped with a composite filter according to another embodiment of the present invention has first support protrusions formed around the outer circumferential surface of the third upper cap member that protrude radially outward, so that the third upper cap member supports the inner surface of the second downward lower guide, thereby securing a second purified water flow path so that the second purified water flows around the third upper cap member.The first support protrusions are arranged at equal intervals, so that the second purified water can move evenly in the circumferential direction of the third upper cap member, thereby improving the flow of the second purified water and thereby improving product reliability.

[0032] A water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve workability by enabling subassembly of the second module through the third upper cap member and the third lower cap member, and by stably forming a third purified water flow path during stacking of the first module and the second module because the discharge tube member is extended upward from the third lower cap member.

[0033] A water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve the operational stability of the water purifier by arranging a third upward upper guide formed on a third upper cap member at a predetermined distance from a discharge tube member, thereby forming a second purified water flow path between the third upward upper guide and the discharge tube member, and allowing the second purified water to flow smoothly.

[0034] A water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve operability by easily connecting the first module and the second module in such a manner that, when the connector body of the connector member is press-fitted and fixed inside the second lower cap member, an upward rib extending upward from the connector body is connected to the central tube, and a downward rib extending downward from the connector body is connected to the third upward upper guide.

[0035] A water purifier equipped with a composite filter according to another embodiment of the present invention is provided with a cover lower cap that surrounds the outside of the second module to prevent the raw water and the second purified water from mixing, and the cover lower cap is configured to be easily assembled by being coupled to a second downward lower guide formed on the second lower cap member, thereby improving workability.

[0036] A water purifier equipped with a composite filter according to another embodiment of the present invention has second support protrusions formed around the outer periphery of the third lower cap member, protruding radially outward, so that the third lower cap member supports the inner surface of the cover lower cap, thereby securing a third purified water flow path so that the third purified water flows around the third lower cap member. The second support protrusions are arranged at equal intervals, so that the third purified water can move evenly in the circumferential direction of the third lower cap member, thereby improving the flow of the third purified water and thereby improving product reliability.

[0037] A water purifier equipped with a composite filter according to another embodiment of the present invention can control the flow of raw water, purified water, and domestic water by controlling the valve unit through the control unit, and aims to improve product reliability by effectively preventing backflow of these fluids.

[0038] According to yet another aspect of the present invention, a water purifier equipped with a composite filter is provided that integrates a spiral filter member to form a composite filter that allows for raw water inlet, third purified water outlet, and domestic water outlet, thereby improving user convenience; the head member of the housing is provided with first and second partition walls to form independent flow paths that prevent the raw water, third purified water, and domestic water from mixing; the tubes through which the raw water, third purified water, and domestic water flow are concentrated at the top of the composite filter, improving layout design freedom for other parts; and the filtration section has a pre-treatment filter member and a post-treatment filter member stacked via a first upper cap member and a second upper cap member, with the spiral filter member positioned radially inward of these filter members, allowing the composite filter to be manufactured using a pre-manufactured spiral filter member, thereby improving manufacturability.

[0039] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the filtering section is provided with a second lower cap member that fixes the post-treatment filter member and the spiral filter member, thereby improving structural stability, and a connecting pipe member is provided radially inside the spiral filter member, thereby preventing the third purified water from mixing with the second purified water, thereby improving the quality of the third purified water that is finally discharged, thereby increasing user satisfaction.

[0040] The water purifier equipped with a composite filter according to another embodiment of the present invention aims to improve the structural stability by stably connecting the second lower cap member and the connecting pipe member by the pipe support guide, and to improve the operational stability of the water purifier by allowing the third purified water to flow stably.

[0041] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, a spiral filter member is arranged spirally around a central tube, a second purified water through-hole is formed so that a second purified water flows into a second purified water flow path provided therein, and a connecting pipe member inserted through the center of the central tube is spaced a certain distance from the central tube, thereby stably maintaining the second purified water flow path and improving the operational reliability of the water purifier through a smooth flow of the second purified water.

[0042] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, a third lower cap member is disposed below the spiral filter member, and the central tube is disposed to pass through the third lower cap member. Therefore, even if the first purified water flows above the third lower cap member, it does not mix with the second purified water flowing through the bottom of the third lower cap member. This prevents deterioration in the quality of the second purified water and improves the quality of the third purified water that is finally discharged, thereby improving user satisfaction.

[0043] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the central tube is arranged to pass through the second through-hole formed in the third lower cap member, so that the penetration state of the central tube is stably maintained, improving structural stability, and the second purified water smoothly moves to the lower part of the third lower cap member through the penetration portion of the central tube, thereby improving the operational reliability of the water purifier.

[0044] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, a third upward support guide is disposed between the spiral filter member and the post-treatment filter member, thereby preventing a decrease in the quality of the second purified water and improving the quality of the third purified water that is finally discharged, thereby aiming to improve user satisfaction.

[0045] A water purifier equipped with a composite filter according to yet another embodiment of the present invention aims to improve the structural stability of the composite filter by forming a second upward support guide so that the post-treatment filter member is fixedly positioned.

[0046] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the second downward guide supports the lower surface of the fourth lower cap member, thereby stably maintaining the separation between the lower surfaces of the second lower cap member and the fourth lower cap member, and the third purified water that has moved to the bottom of the second lower cap member moves smoothly through the third through-hole formed in the second downward guide, thereby improving the operational stability of the water purifier.

[0047] A water purifier having a composite filter according to yet another embodiment of the present invention aims to improve the structural stability of the composite filter by stably fixing the spiral filter member through the third upper cap member.

[0048] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, domestic water that has moved to the upper end of the spiral filter member moves through the third upward guide and is then discharged to the outside, thereby stably discharging domestic water and improving the operational stability of the water purifier.

[0049] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the first partition wall is arranged to extend in the axial direction along the third upward guide, thereby effectively preventing the discharged domestic water from mixing with the incoming raw water, thereby improving the quality of the final third purified water and thereby increasing user satisfaction.

[0050] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the second partition wall is arranged to extend in the axial direction along the connecting pipe member, thereby effectively preventing the outflowing third purified water from mixing with the discharged domestic water, thereby improving the quality of the final outflowing third purified water and thereby increasing user satisfaction.

[0051] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the pre-treatment filter member can be fixed by arranging a first upper cap member and a first lower cap member on the top and bottom of the pre-treatment filter member, respectively, thereby enabling modularization of the composite filter through a subassembly process, improving workability, and the first lower cap member is stacked with the second upper cap member, stably maintaining the stacked state of the pre-treatment filter member and the post-treatment filter member, thereby improving the structural stability of the composite filter.

[0052] A water purifier equipped with a composite filter according to yet another embodiment of the present invention aims to improve the structural stability of the composite filter by stably connecting the first upper cap member and the first lower cap member through the first connecting tube, and to improve the operational stability of the water purifier by allowing raw water to flow smoothly through the raw water through-hole formed in the first connecting tube.

[0053] A water purifier equipped with a composite filter according to yet another embodiment of the present invention aims to improve structural stability by stably connecting the first upper cap member and the first lower cap member through the second connecting tube, and to improve operational stability by allowing the first purified water to flow smoothly through the first purified water through-hole formed in the second connecting tube.

[0054] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the fourth lower cap member is spaced apart from the underside of the second lower cap member, allowing the third purified water to flow smoothly, and the fourth upward support guide is arranged to simultaneously surround the second upper cap member and the second lower cap member, preventing the third purified water from accidentally flowing out and the raw water from accidentally flowing in, thereby improving the operational stability of the water purifier.

[0055] A water purifier equipped with a composite filter according to yet another embodiment of the present invention can control the flow of raw water, third purified water, and domestic water by controlling the valve unit through the control unit, and aims to improve product reliability by effectively preventing backflow of these fluids. [Means for solving the problem]

[0056] To achieve the above object, a water purifier equipped with a composite filter according to one aspect of the present invention includes a housing having 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 domestic water outlet port through which domestic water generated during the filtration process is discharged, and a filtration unit disposed inside the housing and having a pre-treatment filter member that filters the raw water to generate first purified water, a reverse osmosis filter member that filters the first purified water to generate second purified water, and a post-treatment filter member that filters the second purified water to generate third purified water, and the housing has a first partition wall that prevents the raw water and the domestic water from mixing, and a filter unit that prevents the domestic water and the purified water from mixing. and a body member extending from the head member and having the filtration unit disposed therein. The filtration unit includes a first module having the pre-treatment filter member and the reverse osmosis filter member sequentially disposed therein, a second module disposed on top of the first module and having the post-treatment filter member disposed therein, and a guide member disposed to surround the outside of the second module so that the raw water entering the upper part of the housing unit moves to the first module while bypassing the second module, and the guide member has a domestic water flow path inside which the domestic water discharged to the outside of the first module moves.

[0057] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the guide member includes a guide lower cap arranged to surround the second module and a guide upper cap arranged outside the guide lower cap, and the domestic water flow path through which the domestic water discharged outside the first module flows is provided between the guide lower cap and the guide upper cap.

[0058] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the guide upper cap includes an upward upper guide extending upward to form the domestic water flow path, and the first partition wall body is disposed to extend in an axial direction along the upward upper guide.

[0059] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the first module includes a first upper cap member having the reverse osmosis filter member fixed to a lower portion thereof and a first through-hole formed therein so that the domestic water can be discharged to the outside of the first module.

[0060] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the first module includes a second upper cap member having the pre-treatment filter member fixed to a lower portion thereof and through which the reverse osmosis filter member is disposed, and the guide upper cap is extended to the second upper cap member.

[0061] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the first module supports the reverse osmosis filter member in a spirally wound state and includes a central tube having a second through hole formed therein so that the second purified water flows therethrough, and the central tube is disposed to penetrate the center of the guide lower cap so that the second purified water flows toward the second module.

[0062] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the second module includes a third upper cap member and a third lower cap member to which the post-treatment filter member is fixed, and the third lower cap member is spaced a predetermined distance from an upper surface of the guide lower cap member so that a second purified water flow path is formed extending around the third lower cap member.

[0063] In the water purifier having a composite filter according to one embodiment of the present invention, a support surface protruding upward is formed at the center of the third lower cap member so that the central tube can be inserted and positioned therein.

[0064] In a water purifier equipped with a composite filter according to one embodiment of the present invention, a switching surface is provided at an upper end of the support surface to switch the flow direction of the second purified water, which flows in an axial direction through the central tube, so that the second purified water flows in a radial direction.

[0065] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the third lower cap member includes at least two first support protrusions formed protruding radially outward around an outer circumferential surface, and the first support protrusions are spaced apart at equal intervals.

[0066] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the third upper cap member includes a third upward guide extending upward to form a third purified water flow path, and the second partition wall body is disposed to extend in an axial direction along the third upward guide.

[0067] The water purifier including the composite filter according to an embodiment of the present invention further includes a valve unit that controls the flow of the raw water, the purified water, and the domestic water, and a control unit that controls the operation of the valve unit.

[0068] According to another aspect of the present invention, a water purifier including a composite filter includes a housing having 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 domestic water outlet port through which domestic water generated during the filtration process is discharged, and a filtration unit disposed inside the housing and including a pre-treatment filter member that filters the raw water to generate first purified water, a reverse osmosis filter member that filters the first purified water to generate second purified water, and a post-treatment filter member that filters the second purified water to generate third purified water, and the housing is configured to mix the raw water and the domestic water. and a head member having a first partition wall that prevents the domestic water from being mixed with the purified water and a second partition wall that prevents the domestic water from being mixed with the purified water; and a body member that extends from the head member and has the filtration unit disposed therein. The filtration unit includes a first module having the pre-treatment filter member and the reverse osmosis filter member sequentially disposed therein, and a second module disposed below the first module and having the post-treatment filter member disposed therein. The second module includes a discharge tube member that penetrates through the center of the first module so that the third purified water can be discharged to the outside.

[0069] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the first module supports the reverse osmosis filter member in a spirally wound state and includes a central tube having a first through hole formed therein through which the second purified water flows, and the discharge tube member is disposed through the center of the central tube and spaced a predetermined distance from the central tube to form a second purified water flow path through which the second purified water flows between the central tube and the discharge tube member.

[0070] In a water purifier having a composite filter according to another embodiment of the present invention, the second partition wall is disposed to extend in an axial direction along the discharge tube member.

[0071] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the first module includes a first upper cap member having the reverse osmosis filter member disposed thereunder, and the first upper cap member includes a first upward guide disposed at a predetermined distance from the central tube to form a drinking water flow path through which the drinking water is discharged.

[0072] In a water purifier having a composite filter according to another embodiment of the present invention, the first partition wall is disposed to extend in an axial direction along the first upward guide.

[0073] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the first module includes a second upper cap member and a second lower cap member to which the pre-treatment filter member is fixedly disposed, and the first upward guide is disposed to pass through the second upper cap member.

[0074] A water purifier equipped with a composite filter according to another embodiment of the present invention is characterized in that it includes a connecting tube connecting the second upper cap member and the second lower cap member, and the connecting tube has a second through hole through which the first purified water flows.

[0075] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the second module includes a third upper cap member and a third lower cap member to which the post-treatment filter member is fixed, and the discharge tube member is extended upward from the third upper cap member.

[0076] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the third upper cap member is spaced a predetermined distance from the lower surface of the second lower cap member so that the second purified water flow path extends around the third upper cap member.

[0077] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the second lower cap member includes a second downward lower guide arranged to surround the exterior of the second module.

[0078] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the third upper cap member includes at least two first support protrusions formed protruding radially outward around an outer peripheral surface, and the first support protrusions are spaced apart at equal intervals.

[0079] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the second module includes a third upper cap member and a third lower cap member to which the post-treatment filter member is fixed, and the discharge tube member is extended upward from the third lower cap member.

[0080] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the discharge tube member is disposed to pass through the third upper cap member, and the third upper cap member includes a third upward upper guide disposed at a predetermined distance from the discharge tube member so as to form the second purified water flow path.

[0081] A water purifier equipped with a composite filter according to another embodiment of the present invention includes a connector member that connects the first module and the second module to each other, and the connector member includes a connector body that is press-fitted and fixed inside the second lower cap member, an upward rib extending upward from the connector body to connect with the central tube, and a downward rib extending downward from the connector body to connect with the third upward upper guide.

[0082] A water purifier equipped with a composite filter according to another embodiment of the present invention is characterized in that a cover lower cap is provided to surround the exterior of the second module, and the cover lower cap is coupled to the second downward lower guide.

[0083] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the third lower cap member includes at least two second support protrusions formed protruding radially outward around the outer circumferential surface, and the second support protrusions are spaced apart at equal intervals.

[0084] According to another embodiment of the present invention, a water purifier including a composite filter further includes a valve unit for switching on and off the flow of the raw water, the purified water, and the domestic water, and a control unit for controlling the operation of the valve unit.

[0085] According to yet another aspect of the present invention, a water purifier equipped with a composite filter includes a housing having 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 domestic water outlet port through which domestic water produced during the filtration process is discharged, and a filtration unit including a pre-treatment filter member that filters the raw water to produce first purified water, a spiral filter member that filters the first purified water to produce second purified water, and a post-treatment filter member that filters the second purified water to produce third purified water and is stacked below the pre-treatment filter member, and the housing is configured to mix the raw water and the domestic water. and a head member provided with a first partition wall that prevents the third purified water from being mixed with the domestic water and a second partition wall that prevents the third purified water from being mixed with the domestic water, and a body member that extends from the head member and has the filtration unit disposed therein, wherein the filtration unit includes a first upper cap member below which the pre-treatment filter member disposed radially outward and the spiral filter member disposed radially inward are disposed, and a second upper cap member below which the post-treatment filter member disposed radially outward and the spiral filter member disposed radially inward are disposed to pass through.

[0086] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the filtering unit includes a second lower cap member having the post-treatment filter member and the spiral filter member fixed thereto, and a connecting pipe member disposed radially inside the spiral filter member to prevent the second purified water and the third purified water from mixing.

[0087] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the second lower cap member includes a pipe support guide extending upward to be connected to the connecting pipe member.

[0088] In a water purifier having a composite filter according to yet another embodiment of the present invention, the spiral filter member supports the spiral filter member in a spirally wound state and includes a central tube having a second purified water through-hole formed therein so that the second purified water flows therethrough, and the connecting pipe member is disposed through the center of the central tube and is spaced apart from the central tube by a predetermined distance to form a second purified water flow path through which the second purified water flows between the central tube and the connecting pipe member.

[0089] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the filtering unit is disposed below the spiral filter member and includes a third lower cap member through which the central tube passes so that the second purified water moves downward.

[0090] In a water purifier having a composite filter according to yet another embodiment of the present invention, the third lower cap member includes a second through hole through which the central tube is disposed.

[0091] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the third lower cap member includes a third upward support guide extending upward to be disposed between the spiral filter member and the post-treatment filter member.

[0092] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the second lower cap member includes a second upward support guide extending upward to fix the post-treatment filter member.

[0093] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the second lower cap member includes a second downward guide extending downward, and the second downward guide includes a third through hole through which the third purified water flows, the third through hole being moved to a lower portion of the second lower cap member.

[0094] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the filtering unit includes a third upper cap member stacked on the first upper cap member so that the spiral filter member is fixedly disposed at a lower portion thereof.

[0095] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the third upper cap member includes a third upward guide extending upward so that the domestic water that has moved to the upper end of the spiral filter member can be discharged to the outside.

[0096] In a water purifier having a composite filter according to yet another embodiment of the present invention, the first partition wall is disposed to extend in an axial direction along the third upward guide.

[0097] In a water purifier having a composite filter according to yet another embodiment of the present invention, the second partition wall is disposed to extend in an axial direction along the connecting pipe member.

[0098] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the filtering unit includes a first lower cap member stacked on the second upper cap member so that the pre-treatment filter member is fixedly disposed on the upper portion.

[0099] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, a first connecting tube is provided radially outward to connect the first upper cap member and the first lower cap member, and a raw water through hole through which the raw water flows is formed in the first connecting tube.

[0100] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, a second connecting tube is provided radially inward to connect the first upper cap member and the first lower cap member, and a first purified water through hole through which the first purified water flows is formed in the second connecting tube.

[0101] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the filtering unit includes a fourth lower cap member supporting the second lower cap member so that the second lower cap member is spaced apart from the upper surface thereof, and the fourth lower cap member includes a fourth upward support guide extending upward to simultaneously surround the second upper cap member and the second lower cap member.

[0102] According to another embodiment of the present invention, the water purifier including the composite filter further includes a valve unit that controls the flow of the raw water, the purified water, and the domestic water, and a control unit that controls the operation of the valve unit. [Effects of the Invention]

[0103] According to the above-described configuration, a water purifier equipped with a composite filter according to one aspect of the present invention is capable of receiving raw water, discharging purified water, and discharging domestic water. The composite filter is constructed by integrating reverse osmosis filter members. Each filter is modularized into a first module having a pre-treatment filter member and a reverse osmosis filter member, and a second module having a post-treatment filter member. The composite filter is constructed by stacking the first and second modules, improving manufacturability. The housing has three filter members integrated into it, facilitating downsizing and replacement of the water purifier. Furthermore, raw water entering the upper part of the housing flows to the first module through the outside of the guide member, preventing it from mixing with purified water passing through the inside of the second module. This ensures stable operation of the water purifier. Furthermore, the head member of the housing has first and second partition walls to form independent flow paths that prevent the raw water, purified water, and domestic water from mixing. This allows the tubes through which the raw water, purified water, and domestic water flow to be concentrated at the top of the composite filter, improving the flexibility of layout design for other parts.

[0104] In a water purifier equipped with a composite filter according to an embodiment of the present invention, domestic water discharged outside the first module flows through the domestic water flow path provided between the guide upper cap and the guide lower cap, so that the raw water flowing outside the guide member is not mixed with the purified water flowing inside the second module, thereby improving the operational stability of the water purifier.

[0105] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the first partition wall is arranged to extend in the axial direction along the upward upper guide, so that the discharged domestic water does not mix with the incoming raw water, thereby improving the operational stability of the water purifier.

[0106] In a water purifier equipped with a composite filter according to one embodiment of the present invention, after domestic water is discharged outside the first module, it flows through the domestic water flow path provided in the guide member, so that it does not mix with the purified water flowing inside the first module and the second module, thereby providing an effect of improving the operational stability of the water purifier.

[0107] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the guide upper cap is extended to the second upper cap member, so that raw water flowing toward the first module is prevented from flowing inside the guide upper cap, and domestic water discharged outside the first module is prevented from flowing outside the guide upper cap, thereby improving the operational stability of the water purifier.

[0108] In a water purifier equipped with a composite filter according to an embodiment of the present invention, a reverse osmosis filter member is arranged spirally around a central tube, and a second through-hole is formed so that a second purified water flows into a second purified water flow path provided therein, thereby stably maintaining the second purified water flow path and ensuring operational reliability through a smooth flow of the second purified water. Furthermore, since the central tube is arranged to penetrate the center of the guide lower cap, the second purified water flows into the guide lower cap, preventing it from mixing with discharged domestic water, thereby improving the operational stability of the water purifier.

[0109] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the third lower cap member is disposed at a predetermined distance from the upper surface of the guide lower cap, and a second purified water flow path is formed between the third lower cap member and the guide lower cap, allowing the second purified water to flow smoothly, thereby improving the operational stability of the water purifier.

[0110] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the central tube is inserted into a support surface formed on the third lower cap member that protrudes upward, thereby enabling the central tube to be stably fixed, thereby improving structural stability and allowing the second purified water to flow stably, thereby improving the operational stability of the water purifier.

[0111] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the second purified water that flows in the axial direction through the central tube is redirected to the radial direction by the switching surface, thereby stably flowing the second purified water, thereby improving the operational stability of the water purifier.

[0112] A water purifier equipped with a composite filter according to one embodiment of the present invention has first support protrusions formed around the outer periphery of the third lower cap member, protruding radially outward, so that the third lower cap member supports the inner surface of the guide lower cap, thereby securing a second purified water flow path so that the second purified water flows around the third lower cap member. Furthermore, the first support protrusions are arranged at equal intervals, so that the second purified water can move evenly in the circumferential direction of the third lower cap member, thereby improving the flow of the second purified water and providing an effect of improving product reliability.

[0113] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the second partition wall is arranged to extend in the axial direction along the third upward guide, thereby preventing the third purified water from being mixed with the discharged domestic water, thereby improving the operational stability of the water purifier.

[0114] A water purifier equipped with a composite filter according to an embodiment of the present invention can control the flow of raw water, purified water, and domestic water by controlling the valve unit through the control unit, and can effectively prevent backflow of these fluids, thereby improving product reliability.

[0115] According to another aspect of the present invention, a water purifier equipped with a composite filter is capable of receiving raw water, outputting purified water, and discharging domestic water. The composite filter is constructed by integrating reverse osmosis filter members, and each filter is modularized through a first module having a pre-treatment filter member and a reverse osmosis filter member, and a second module having a post-treatment filter member. The composite filter is constructed by stacking the first and second modules, which improves manufacturability, and the housing has three filter members integrated, which reduces the size of the water purifier. The first module is easily assembled and replaced, and the discharge tube member is disposed through the center of the first module so that the third purified water generated from the second module disposed below can be discharged to the outside, preventing the third purified water from mixing with the second purified water, thereby ensuring the operational stability of the water purifier. Furthermore, the head member of the housing is provided with first and second partition walls so that independent flow paths are formed in which the raw water, purified water, and domestic water do not mix, and the tubes through which the raw water, purified water, and domestic water flow are concentrated above the composite filter, thereby improving the flexibility of the layout design of other parts.

[0116] In a water purifier equipped with a composite filter according to another embodiment of the present invention, a reverse osmosis filter member is spirally wound around a central tube, and a first through-hole is formed so that a second purified water flows into a second purified water flow path provided therein. A discharge tube member inserted through the center of the central tube is spaced a certain distance from the central tube, thereby stably maintaining the second purified water flow path and improving operational reliability through a smooth flow of the second purified water.

[0117] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the second partition wall is arranged to extend in the axial direction along the discharge tube member, thereby effectively preventing the third purified water from being mixed with the discharged domestic water, thereby improving the operational stability of the water purifier.

[0118] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the discharged domestic water is discharged to the outside through a domestic water flow path formed between the first upward guide provided in the first upper cap member and the central tube, so that the domestic water is not mixed with the raw water or the first purified water, thereby improving the operational stability of the water purifier.

[0119] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the first partition wall is arranged to extend in the axial direction along the first upward guide, thereby preventing the discharged domestic water from mixing with the incoming raw water, thereby improving the operational stability of the water purifier.

[0120] A water purifier equipped with a composite filter according to another embodiment of the present invention improves workability by enabling subassembly of the first module through the second upper cap member and the second lower cap member, and provides the effect of improving durability of the water purifier by enabling stable fixation of the first upper cap member.

[0121] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the second upper cap member and the second lower cap member are stably connected through the connecting tube, thereby improving structural stability, and the first purified water flows smoothly through the second through-hole formed in the connecting tube, thereby improving the operational stability of the water purifier.

[0122] A water purifier equipped with a composite filter according to another embodiment of the present invention improves workability by enabling subassembly of the second module through the third upper cap member and the third lower cap member, and since the discharge tube member is extended upward from the third upper cap member, a third purified water flow path is stably formed during the process of stacking the first module and the second module, thereby improving the operational stability of the water purifier.

[0123] In a water purifier equipped with a composite filter according to another embodiment of the present invention, a third upper cap member is disposed at a predetermined distance from the underside of the second lower cap member, forming a second purified water flow path between the third upper cap member and the second lower cap member, allowing the second purified water to flow smoothly, thereby improving the operational stability of the water purifier.

[0124] A water purifier equipped with a composite filter according to another embodiment of the present invention is configured to be easily assembled by inserting the second module into a second downward lower guide formed on a second lower cap member to stack the first module and the second module, thereby improving workability.

[0125] A water purifier equipped with a composite filter according to another embodiment of the present invention has first support protrusions formed around the outer circumferential surface of the third upper cap member that protrude radially outward, so that the third upper cap member supports the inner surface of the second downward lower guide, thereby securing a second purified water flow path so that the second purified water flows around the third upper cap member. The first support protrusions are arranged at equal intervals, so that the second purified water can move evenly in the circumferential direction of the third upper cap member, thereby improving the flow of the second purified water and providing an effect of improving product reliability.

[0126] A water purifier equipped with a composite filter according to another embodiment of the present invention improves workability by enabling subassembly of the second module through the third upper cap member and the third lower cap member, and since the discharge tube member is extended upward from the third lower cap member, a third purified water flow path is stably formed during the process of stacking the first module and the second module, thereby improving the operational stability of the water purifier.

[0127] In a water purifier equipped with a composite filter according to another embodiment of the present invention, a third upward upper guide formed on a third upper cap member is spaced a certain distance from a discharge tube member, forming a second purified water flow path between the third upward upper guide and the discharge tube member, allowing the second purified water to flow smoothly, thereby improving the operational stability of the water purifier.

[0128] In a water purifier equipped with a composite filter according to another embodiment of the present invention, the connector body of the connector member is press-fitted and fixed inside the second lower cap member, and an upward rib extending upward from the connector body is coupled to the central tube, and a downward rib extending downward from the connector body is coupled to the third upward upper guide, thereby easily coupling the first module and the second module, thereby improving operability.

[0129] A water purifier equipped with a composite filter according to another embodiment of the present invention is provided with a cover lower cap that surrounds the outside of the second module to prevent the raw water and the second purified water from mixing, and this cover lower cap is configured to be easily assembled by being coupled to a second downward lower guide formed on the second lower cap member, thereby providing an effect of improving workability.

[0130] A water purifier equipped with a composite filter according to another embodiment of the present invention has second support protrusions formed around the outer periphery of the third lower cap member, protruding radially outward, so that the third lower cap member supports the inner surface of the cover lower cap. This allows the third purified water to flow around the third lower cap member, thereby securing a third purified water flow path. The second support protrusions are arranged at equal intervals, allowing the third purified water to move evenly in the circumferential direction of the third lower cap member, thereby improving the flow of the third purified water and providing the effect of improving product reliability.

[0131] A water purifier equipped with a composite filter according to another embodiment of the present invention can control the flow of raw water, purified water, and domestic water by controlling the valve unit through the control unit, and can effectively prevent backflow of these fluids, thereby improving product reliability.

[0132] According to yet another aspect of the present invention, a water purifier equipped with a composite filter is provided that integrates a spiral filter member to form a composite filter that allows raw water to be input, third purified water to be output, and domestic water to be discharged, thereby improving user convenience. The head member of the housing is provided with first and second partition walls to form independent flow paths that prevent the raw water, third purified water, and domestic water from mixing. This allows the tubes through which the raw water, third purified water, and domestic water flow to be concentrated at the top of the composite filter, improving layout design freedom for other parts. In the filtration section, a pre-treatment filter member and a post-treatment filter member are stacked via a first upper cap member and a second upper cap member, and a spiral filter member is disposed radially inside these filter members, allowing the composite filter to be manufactured using a pre-fabricated spiral filter member, thereby improving manufacturability.

[0133] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the filtering section is provided with a second lower cap member that fixes the post-treatment filter member and the spiral filter member, thereby improving structural stability, and a connecting pipe member is provided radially inside the spiral filter member, thereby preventing the third purified water from mixing with the second purified water, thereby improving the quality of the third purified water that is finally discharged, thereby providing an effect of improving user satisfaction.

[0134] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the second lower cap member and the connecting pipe member are stably connected by the pipe support guide, thereby improving structural stability and allowing the third purified water to flow stably, thereby improving the operational stability of the water purifier.

[0135] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, a spiral filter member is arranged spirally around the central tube, and a second purified water through-hole is formed so that the second purified water flows into a second purified water flow path provided therein. A connecting pipe member inserted through the center of the central tube is spaced a certain distance from the central tube, thereby stably maintaining the second purified water flow path and providing an effect of improving the operational reliability of the water purifier through a smooth flow of the second purified water.

[0136] In a water purifier equipped with a composite filter according to another embodiment of the present invention, a third lower cap member is disposed below the spiral filter member, and the central tube is disposed to pass through the third lower cap member. Therefore, even if the first purified water flows above the third lower cap member, it does not mix with the second purified water flowing through the bottom of the third lower cap member. This prevents deterioration in the quality of the second purified water and improves the quality of the third purified water that is finally discharged, thereby providing an effect of improving user satisfaction.

[0137] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the central tube is arranged to pass through the second through-hole formed in the third lower cap member, so that the penetration state of the central tube is stably maintained, improving structural stability, and the second purified water smoothly moves to the lower part of the third lower cap member through the penetration portion of the central tube, thereby improving the operational reliability of the water purifier.

[0138] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, a third upward support guide is disposed between the spiral filter member and the post-treatment filter member, thereby preventing a decrease in the quality of the second purified water and improving the quality of the third purified water that is finally discharged, thereby providing an effect of improving user satisfaction.

[0139] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, a second upward support guide is formed to fix the post-treatment filter member, thereby improving the structural stability of the composite filter.

[0140] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the second downward guide supports the lower surface of the fourth lower cap member, so that the separation state between the lower surfaces of the second lower cap member and the fourth lower cap member is stably maintained, and the third purified water that has moved to the bottom of the second lower cap member moves smoothly through the third through-hole formed in the second downward guide, thereby improving the operational stability of the water purifier.

[0141] A water purifier including a composite filter according to yet another embodiment of the present invention provides an effect of improving the structural stability of the composite filter by stably fixing the spiral filter member through the third upper cap member.

[0142] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, domestic water that has moved to the upper end of the spiral filter member moves through the third upward guide and is then discharged to the outside, thereby providing an effect of stably discharging domestic water and improving the operational stability of the water purifier.

[0143] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the first partition wall is arranged to extend in the axial direction along the third upward guide, thereby effectively preventing the discharged domestic water from mixing with the incoming raw water, thereby improving the quality of the final third purified water, thereby providing an effect of improving user satisfaction.

[0144] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the second partition wall is arranged to extend in the axial direction along the connecting pipe member, thereby effectively preventing the third purified water from being mixed with the discharged domestic water, thereby improving the quality of the third purified water that is finally discharged, thereby providing an effect of improving user satisfaction.

[0145] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the pre-treatment filter member can be fixed by arranging a first upper cap member and a first lower cap member on the top and bottom of the pre-treatment filter member, respectively, which allows the composite filter to be modularized through a subassembly process, improving workability. In addition, the first lower cap member is stacked with the second upper cap member, which stably maintains the stacked state of the pre-treatment filter member and the post-treatment filter member, thereby improving the structural stability of the composite filter.

[0146] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the first upper cap member and the first lower cap member are stably connected through the first connecting tube, thereby improving the structural stability of the composite filter, and raw water flows smoothly through the raw water through-hole formed in the first connecting tube, thereby improving the operational stability of the water purifier.

[0147] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the first upper cap member and the first lower cap member are stably connected through the second connecting tube, thereby improving structural stability, and the first purified water flows smoothly through the first purified water through-hole formed in the second connecting tube, thereby improving the operational stability of the water purifier.

[0148] In a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the fourth lower cap member is spaced apart from the underside of the second lower cap member, allowing the third purified water to flow smoothly, and the fourth upward support guide is arranged to simultaneously surround the second upper cap member and the second lower cap member, preventing the third purified water from accidentally flowing out and the raw water from accidentally flowing in, thereby improving the operational stability of the water purifier.

[0149] A water purifier equipped with a composite filter according to yet another embodiment of the present invention can control the flow of raw water, third purified water, and domestic water by controlling the valve unit through the control unit, and can effectively prevent these fluids from flowing backward, thereby improving product reliability. [Brief explanation of the drawings]

[0150] [Figure 1] 1 is a structural view illustrating a water purifier including a composite filter according to an embodiment of the present invention; [Figure 2] 1 is a plan view illustrating a head member of a water purifier having a composite filter according to an embodiment of the present invention; [Figure 3] 1 is a cross-sectional view illustrating a state in which a first module and a second module of a water purifier including a composite filter according to an embodiment of the present invention are disassembled. [Figure 4] 1 is a cross-sectional view illustrating an assembled state of a first module and a second module of a water purifier including a composite filter according to an embodiment of the present invention. [Figure 5] 1 is a cross-sectional view illustrating a state in which an upper cap member and a lower cap member of a water purifier having a composite filter according to an embodiment of the present invention are disassembled; [Figure 6] FIG. 6 is a cross-sectional view of part II in FIG. 5. [Figure 7] 1 is a cross-sectional view illustrating a state in which a filtering unit of a water purifier having a composite filter according to an embodiment of the present invention is installed in a housing unit; [Figure 8] 1 is a diagram illustrating the overall water piping of a water purifier having a composite filter according to an embodiment of the present invention; [Figure 9] 10 is a structural view illustrating a water purifier having a composite filter according to another embodiment of the present invention. [Figure 10] 10 is a plan view illustrating a head member of a water purifier having a composite filter according to another embodiment of the present invention. [Figure 11]10 is a cross-sectional view illustrating a state in which a first module and a second module of a water purifier having a composite filter according to another embodiment of the present invention are disassembled. [Figure 12] 10 is a cross-sectional view illustrating an assembled state of a first module and a second module of a water purifier having a composite filter according to another embodiment of the present invention. [Figure 13] 10 is a cross-sectional view illustrating a state in which an upper cap member and a lower cap member of a water purifier having a composite filter according to another embodiment of the present invention are disassembled; FIG. [Figure 14] FIG. 14 is a cross-sectional view of part II in FIG. [Figure 15] 10 is a cross-sectional view illustrating a state in which a filtering unit of a water purifier having a composite filter according to another embodiment of the present invention is installed in a housing unit. [Figure 16] 10 is a cross-sectional view illustrating a state in which a first module and a second module of a water purifier having a composite filter according to another embodiment of the present invention are disassembled. [Figure 17] 10 is a cross-sectional view illustrating an assembled state of a first module and a second module of a water purifier having a composite filter according to another embodiment of the present invention. [Figure 18] 10 is a cross-sectional view illustrating a state in which an upper cap member and a lower cap member of a water purifier having a composite filter according to another embodiment of the present invention are disassembled; FIG. [Figure 19] FIG. 19 is a cross-sectional view of the II-II portion of FIG. [Figure 20] 10 is a cross-sectional view illustrating a state in which a filtering unit of a water purifier having a composite filter according to another embodiment of the present invention is installed in a housing unit. [Figure 21] 10 is a diagram illustrating the overall water piping of a water purifier having a composite filter according to another embodiment of the present invention; FIG. [Figure 22] 10 is a diagram illustrating the overall water piping of a water purifier having a composite filter according to another embodiment of the present invention; FIG. [Figure 23] FIG. 10 is a structural view illustrating a water purifier including a composite filter according to yet another embodiment of the present invention. [Figure 24] 10 is a plan view illustrating a head member of a water purifier having a composite filter according to yet another embodiment of the present invention. [Figure 25] 10 is a cross-sectional view illustrating an assembled state of a filtering unit of a water purifier including a composite filter according to yet another embodiment of the present invention. [Figure 26] 10 is a cross-sectional view illustrating a state in which an upper cap member and a lower cap member of a water purifier having a composite filter according to yet another embodiment of the present invention are disassembled. FIG. [Figure 27] 10 is a cross-sectional view illustrating a state in which a filtering unit of a water purifier having a composite filter according to yet another embodiment of the present invention is installed in a housing unit. [Figure 28] FIG. 27 is a cross-sectional view of part II in FIG. 26. [Figure 29] FIG. 27 is a cross-sectional view of the II-II portion of FIG. 26. [Figure 30] FIG. 10 is a structural view illustrating the overall water piping of a water purifier having a composite filter according to yet another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0151] The words and terms used in this specification and claims should not be interpreted in a limited manner based on their ordinary or dictionary meanings, but should be interpreted in a manner that is consistent with the technical idea of ​​the present invention, in accordance with the principle that the inventor can define the terms and concepts in order to best describe his or her invention.

[0152] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and therefore, there may be various equivalents and modifications that replace the relevant configurations at the time of filing of the present invention.

[0153] In this specification, the terms "comprise" or "have" and the like are intended to describe the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0154] A component being "in front of," "behind," "above," or "below" another component does not only mean that the component is directly adjacent to the other component and is disposed "in front of," "behind," "above," or "below," unless there are special circumstances, but also includes the case where another component is disposed between them. Furthermore, a component being "connected" to another component does not only mean that the components are directly connected to each other, but also includes the case where the components are indirectly connected to each other, unless there are special circumstances.

[0155] A water purifier having a composite filter according to the present invention will be described below with reference to the drawings. FIG. 1 is a structural view of a water purifier having a composite filter according to an embodiment of the present invention. FIG. 2 is a plan view of a head member of a water purifier having a composite filter according to an embodiment of the present invention. FIG. 3 is a cross-sectional view showing a first module and a second module of a water purifier having a composite filter according to an embodiment of the present invention disassembled. FIG. 4 is a cross-sectional view showing a first module and a second module of a water purifier having a composite filter according to an embodiment of the present invention assembled. FIG. 5 is a cross-sectional view showing an upper cap member and a lower cap member of a water purifier having a composite filter according to an embodiment of the present invention disassembled. FIG. 6 is a cross-sectional view of part II of FIG. 5. Here, "a" indicates the axial direction of the composite filter, and "r" indicates the radial direction of the composite filter. Parts not relevant to the description are omitted from the drawings to clearly explain the present invention.

[0156] As shown in Figures 1 to 4, the water purifier equipped with the composite filter according to the present invention includes a housing 1100 having a raw water inlet port 1010 through which raw water W1 is introduced, a purified water outlet port 1020 through which filtered purified water C is discharged, and a domestic water outlet port 1030 through which domestic water W2 produced during the filtration process is discharged, and a filtration unit 1200 disposed inside the housing 1100 and having a pre-treatment filter member 1040 that filters the raw water W1 to produce first purified water C1, a reverse osmosis filter member 1050 that filters the first purified water C1 to produce second purified water C2, and a post-treatment filter member 1060 that filters the second purified water C2 to produce third purified water C3. That is, raw water W1 input through raw water inlet port 1010 is filtered sequentially through pre-treatment filter member 1040, reverse osmosis filter member 1050, and post-treatment filter member 1060 provided in filtration unit 1200, and the final filtered third purified water C3 is discharged through purified water outlet port 1020 and provided to the user. Alternatively, it may be stored in a separate purified water storage unit or supplied to the cold water generator, hot water generator, and ice generator for producing cold water, hot water, and ice. Furthermore, domestic water W2 generated by reverse osmosis filter member 1050 is discharged to the outside of housing unit 1100 through domestic water outlet port 1030 and then discharged to the outside of the water purifier through a separate tube. By configuring the system so that raw water W1 can be input and purified water C can be output, as well as domestic water W2 can be discharged, a composite filter can be configured by integrating reverse osmosis filter member 1050. In this case, the pre-treatment filter member 1040 may be a pre-carbon filter or a microfiltration (MF) filter, and the post-treatment filter member 1060 may be a post-carbon filter or a microfiltration (MF) filter. Alternatively, the pre-treatment filter member 1040 and the post-treatment filter member 1060 may include an electrodeionization type filter. The electrodeionization type refers to EDI (Electro Deionization), CEDI (Continuous Electro Deionization), CDI (Capacitive Deionization), etc.In this case, a separate filter member may be provided on the outer surface of the pre-treatment filter member 1040. For example, this filter member may be an NT filter member. This NT filter member may be made of a material, such as a nanotrap material, that is electrostatically charged to adsorb foreign matter contained in the inflowing raw water W1. This material may be configured to be positively charged. Accordingly, negatively charged foreign matter contained in the raw water W1, such as viruses, bacteria, and fine particles, may be adsorbed to the NT filter member by the static electricity. Alternatively, this filter member may be a sediment filter member.

[0157] The housing part 1100 includes a head member 1110 having a first partition wall 1111 arranged on the outside in the radial direction r to prevent the raw water W1 and the domestic water W2 from mixing, and a second partition wall 1112 arranged on the inside in the radial direction r to prevent the domestic water W2 and the purified water C from mixing, and a body member 1120 extending from the head member 1110 and having a filtration part 1200 arranged inside. The filtration unit 1200 includes a first module 1200A having a pre-treatment filter member 1040 and a reverse osmosis filter member 1050 sequentially arranged therein, a second module 1200B arranged on top of the first module 1200A but having a post-treatment filter member 1060 arranged therein, and a guide member 1200C arranged to surround the outside of the second module 1200B so that raw water W1 entering the top of the housing unit 1100 moves to the first module 1200A while bypassing the second module 1200B, and a domestic water flow path PW2 through which domestic water W2 discharged to the outside of the first module 1200A moves may be provided inside the guide member 1200C. That is, the composite filter is configured such that not only the incoming raw water W1 but also the outgoing third purified water C3 and the outgoing domestic water W2 enter the upper part of the composite filter and exit / discharge from the upper part. For this reason, the head member 1110 may be formed with a raw water region RW1, a third purified water region RC3, and a domestic water region RW2 through which the incoming raw water W1, the outgoing third purified water C3, and the outgoing domestic water W2 flow. A raw water flow path PW1 through which the incoming raw water W1 flows from the upper part is provided inside the housing 1100, and this raw water flow path PW1 extends to the first module 1200A through the outside of the guide member 1200C. A first purified water flow path PC1 may be provided between the pre-treatment filter member 1040 and the reverse osmosis filter member 1050.As described above, the reverse osmosis filter element 1050 is integrated to form a composite filter, since raw water W1 can be input, purified water C can be output, and domestic water W2 can be discharged. However, each filter is modularized using a first module 1200A equipped with a pre-treatment filter element 1040 and a reverse osmosis filter element 1050, and a second module 1200B equipped with a post-treatment filter element 1060. The composite filter is constructed by stacking the first module 1200A and the second module 1200B. This allows each filter element to be modularized through a subassembly process, improving manufacturability. Furthermore, three filter elements are integrated into the housing 1100, making the water purifier more compact and easier to replace. Furthermore, raw water W1 entering the upper part of the housing part 1100 moves to the first module 1200A through the outside of the guide member 1200C, and is therefore not mixed with the purified water C passing through the inside of the second module 1200B, thereby ensuring the operational stability of the water purifier. Furthermore, the head member 1110 of the housing part 1100 is provided with first and second partition walls 1111 and 1112 to form independent flow paths that prevent the raw water W1, purified water C, and domestic water W2 from mixing, and therefore the tubes through which the raw water W1, purified water C, and domestic water W2 flow are concentrated above the composite filter, improving the flexibility of the layout design of other parts.

[0158] As shown in FIG. 4, in a water purifier equipped with a composite filter according to one embodiment of the present invention, a guide member 1200C includes a guide lower cap 1210 arranged to surround the second module 1200B and a guide upper cap 1220 arranged outside the guide lower cap 1210, and a domestic water flow path PW2 through which domestic water W2 discharged outside the first module 1200A flows may be provided between the guide lower cap 1210 and the guide upper cap 1220. That is, the first module 1200A and the second module 1200B are assembled together via the guide upper cap 1220 and the guide lower cap 1210 in a sub-assembly state, and domestic water W2 is discharged to the outside of the first module 1200A and flows through the domestic water flow path PW2 provided between the guide upper cap 1220 and the guide lower cap 1210. This prevents raw water W1 flowing outside the guide member 1200C from mixing with purified water flowing inside the second module 1200B, improving the operational stability of the water purifier. Furthermore, since there is no need to separately form a domestic water flow path PW2 inside the second module 1200B through which domestic water W2 flows, not only is the configuration of the second module 1200B simplified, but the second purified water C2 and the third purified water C3 flow smoothly inside the second module 1200B.

[0159] 4, in a water purifier including a composite filter according to an embodiment of the present invention, the guide upper cap 1220 includes an upward upper guide 1221 extending upward to form a domestic water flow path PW2, and the first partition wall 1111 may be disposed extending in the axial direction a along the upward upper guide 1221. Although the first partition wall 1111 is formed extending in the axial direction a along the upward upper guide 1221, when the head member 1110 and the body member 1120 are coupled to each other, the first partition wall 1111 may be coupled in a manner that covers the outer surface of the upward upper guide 1221, or that the first partition wall 1111 is coupled in a manner that the first partition wall 1111 is inserted into the inner surface of the upward upper guide 1221, or that the first partition wall 1111 is coupled to the upper end of the upward upper guide 1221. In this way, since the first partition wall 1111 is extended in the axial direction a along the upward upper guide 1221, the discharged domestic water W2 is prevented from mixing with the incoming raw water W1, improving the operational stability of the water purifier.

[0160] 3 and 4, in a water purifier including a composite filter according to an embodiment of the present invention, a first module 1200A may include a first upper cap member 1230 having a reverse osmosis filter member 1050 fixed to a lower portion thereof and a first through-hole 1230a formed therein so that domestic water W2 can be discharged to the outside of the first module 1200A. The first upper cap member 1230 may include a first upward guide 1231 extending upward along the axial direction a and a first downward guide 1232 extending downward along the axial direction a. The central tube 1051 of the reverse osmosis filter member 1050 is disposed to pass through the first upper cap member 1230, and the first upward guide 1231 allows the central tube 1051 to be stably maintained in its disposed state, and if a separate O-ring OR is provided between the first upward guide 1231 and the central tube 1051, it can prevent domestic water W2 discharged to the outside of the first module 1200A from flowing back in. In addition, the first downward guide 1232 stably supports the reverse osmosis filter member 1050, and the reverse osmosis filter member 1050 may be provided with a separate packing supported by the first downward guide 1232. That is, after being discharged to the outside of the first module 1200A, the domestic water W2 flows through the domestic water flow path PW2 provided in the guide member 1200C, and is therefore not mixed with the purified water C flowing inside the first module 1200A and the second module 1200B, thereby improving the operational stability of the water purifier. In this case, as shown in FIG. 3, the first through-holes 1230a may be formed on only one side of the center of the first upper cap member 1230 in the radial direction r. That is, the domestic water W2 discharged to the upper end of the reverse osmosis filter member 1050 moves to the outside of the first module 1200A through the first through-holes 1230a, while the domestic water W2 discharged to a position where the first through-holes 1230a are not formed moves in the radial direction r to a position where the first through-holes 1230a are formed and is then discharged to the outside of the first module 1200A through the first through-holes 1230a.In order to allow the domestic water W2 to move smoothly in the radial direction r, spacers may extend downward from the underside of the first upper cap member 1230, and the provision of the spacers allows the first upper cap member 1230 and the reverse osmosis filter member 1050 to be spaced apart by a certain distance, thereby allowing the domestic water W2 to flow smoothly in the radial direction r. Although the spacers are formed to extend in the circumferential direction, a plurality of spacers may be spaced apart at equal intervals so that the discharged domestic water W2 can flow through them.

[0161] 3 and 4, in a water purifier including a composite filter according to an embodiment of the present invention, a first module 1200A includes a second upper cap member 1240 having a pretreatment filter member 1040 fixed to a lower portion thereof and a reverse osmosis filter member 1050 passing therethrough, and the guide upper cap 1220 may be extended to the second upper cap member 1240. That is, since the guide upper cap 1220 is extended to the second upper cap member 1240, raw water W1 flowing toward the first module 1200A is prevented from flowing into the guide upper cap 1220, and domestic water W2 discharged out of the first module 1200A is prevented from flowing out of the guide upper cap 1220, thereby improving the operational stability of the water purifier. The second upper cap member 1240 may be formed with a second downward guide 1241 extending downward along the axial direction a. The second downward guides 1241 may include a second-1 downward guide 1241a disposed on the outer side in the radial direction r to secure the pre-treatment filter member 1040, and a second-2 downward guide 1241b disposed on the inner side in the radial direction r to secure the reverse osmosis filter member 1050. That is, the filter members 40 and 50 are stably secured through the second downward guides 1241 extending downward from the lower surface of the second upper cap member 1240, thereby improving the durability of the water purifier. In this regard, a second lower cap member 1270 may be provided at the lower end of the first module 1200A. A second upward guide 1271 extending upward along the axial direction a may be formed on the second lower cap member 1270. The second upward guide 1271 may include a second-1 upward guide 1271a arranged on the outside in the radial direction r to fix the pretreatment filter member 1040, and a second-2 upward guide 1271b arranged on the inside in the radial direction r to fix the reverse osmosis filter member 1050.That is, the filter members 40 and 50 are stably fixed through the second upward guide 1271 formed by extending upward from the top surface of the second lower cap member 1270, thereby improving the durability of the water purifier. Furthermore, the first module 1200A is sub-assembled through the second upper cap member 1240 and the second lower cap member 1270, thereby enabling modularization of the filter members.

[0162] 3 and 4, in a water purifier including a composite filter according to an embodiment of the present invention, a first module 1200A supports a reverse osmosis filter member 1050 wound in a spiral shape and includes a central tube 1051 having a second through-hole 1051a formed therein so that the second purified water C2 can flow therethrough, and the central tube 1051 may be disposed to penetrate the center of a guide lower cap 1210 so that the second purified water C2 can flow toward the second module 1200B. That is, with the reverse osmosis filter member 1050 wound in a spiral shape around the central tube 1051, a first upper cap member 1230 is attached thereto, and domestic water W2 discharged to the upper end of the reverse osmosis filter member 1050 moves to domestic water flow path PW2 through the first through-hole 1230a and is then discharged to the outside of the first module 1200A. In this case, the upper end of the central tube 1051 may be inserted into the second module 1200B while passing through the guide lower cap 1210 so that the second purified water C2 flows into the interior of the second module 1200B. The second purified water C2 flowing through the inner surface of the reverse osmosis filter member 1050 flows to the second purified water flow path PC2 through the second through-hole 1051a of the central tube 1051. That is, the central tube 1051 is provided on the inner circumferential surface of the reverse osmosis filter member 1050 and the reverse osmosis filter member 1050 is wound in a spiral shape, so that the second purified water flow path PC2 may be stably maintained. A third through-hole 1210a may be formed in the center of the guide lower cap 1210, through which the central tube 1051 passes. When such a third through hole 1210a is formed to extend upward by a certain distance along the axial direction a, the arrangement of the central tube 1051 can be stably maintained, and when a separate O-ring OR is provided between the third through hole 1210a and the central tube 1051, it can prevent the domestic water W2 discharged outside the first module 1200A from flowing in and can prevent the second purified water C2 flowing inside the guide lower cap 1210 from flowing out.

[0163] 4, in a water purifier equipped with a composite filter according to an embodiment of the present invention, a second module 1200B includes a third upper cap member 1250 and a third lower cap member 1260 to which a post-treatment filter member 1060 is fixed, and the third lower cap member 1260 may be spaced a predetermined distance from the upper surface of the guide lower cap 1210 so that a second purified water flow path PC2 extends around the third lower cap member 1260. That is, the third lower cap member 1260 is spaced a predetermined distance from the upper surface of the guide lower cap 1210, and a second purified water flow path PC2 is formed between the third lower cap member 1260 and the guide lower cap 1210, allowing the second purified water C2 to flow smoothly, thereby improving the operational stability of the water purifier.

[0164] 4 and 5, in a water purifier including a composite filter according to an embodiment of the present invention, a support surface 1261 protruding upward may be formed at the center of the third lower cap member 1260 so that the central tube 1051 can be inserted therein. That is, the central tube 1051 is inserted into the support surface 1261 protruding upward from the third lower cap member 1260, thereby enabling the central tube 1051 to be stably fixed, improving structural stability and allowing the second purified water C2 to flow stably, thereby improving the operational stability of the water purifier. However, it is preferable that the support surface 1261 be configured to be spaced a certain distance from the top of the central tube 1051. This is so that the second purified water C2 that has moved to the second module 1200B through the central tube 1051 can be redirected by a switching surface 1262, which will be described later, and move to the bottom of the third lower cap member 1260. Therefore, fixing protrusions may be formed so that the central tube 1051 can be supported even when the support surface 1261 is spaced a certain distance from the top of the central tube 1051, and these fixing protrusions may be configured to support the central tube 1051 while being spaced apart from each other so that the second purified water C2 can flow.

[0165] Furthermore, in a water purifier including a composite filter according to an embodiment of the present invention, a switching surface 1262 may be provided at the upper end of the support surface 1261 to switch the flow direction of the second purified water C2, which flows in the axial direction a through the central tube 1051, so that the second purified water C2 flows in the radial direction r. That is, the flow direction of the second purified water C2, which flows in the axial direction a through the central tube 1051, is switched to the radial direction r by the switching surface 1262, thereby stably flowing the second purified water C2 and improving the operational stability of the water purifier. The switching surface 1262 may be disposed at a predetermined distance from the upper end of the central tube 1051 to stably flow the second purified water C2.

[0166] 5 and 6, in a water purifier including a composite filter according to an embodiment of the present invention, a third lower cap member 1260 includes at least two first support protrusions 1263 protruding outward in a radial direction r around its outer circumferential surface, and the first support protrusions 1263 may be spaced apart at equal intervals. That is, the third lower cap member 1260 has the first support protrusions 1263 protruding outward in the radial direction r around its outer circumferential surface, and the third lower cap member 1260 supports the inner surface of the guide lower cap 1210, thereby ensuring a second purified water flow path PC2 for the second purified water C2 to flow around the third lower cap member 1260. The first support protrusions 1263 are spaced apart at equal intervals, allowing the second purified water C2 to move uniformly around the third lower cap member 1260, thereby improving the flow of the second purified water C2 and improving product reliability. Meanwhile, an O-ring OR may be provided around the outer circumferential surface of the third upper cap member 1250 to prevent the inflow of discharged domestic water W2 and the outflow of the second purified water C2. A third purified water flow path PC3 through which the third purified water C3 flows may be formed in the center of the post-treatment filter member 1060. In this case, the guide lower cap 1210 may include at least two or more second support protrusions 1211 protruding outward in the radial direction r around the outer circumferential surface, and the second support protrusions 1211 may be spaced apart at equal intervals. That is, when the second support protrusions 1211 are formed protruding outward in the radial direction r around the outer circumferential surface of the guide lower cap 1210, they support the inner surface of the guide upper cap 1220, thereby improving structural stability and securing a water flow path PW2 so that the discharged water W2 flows around the guide lower cap 1210. The second support protrusions 1211 are arranged at equal intervals, allowing the water W2 to move evenly around the guide lower cap 1210, improving the flow of the water W2 and thereby improving product reliability.

[0167] FIG. 7 is a cross-sectional view illustrating a state in which a filtering unit of a water purifier having a composite filter according to an embodiment of the present invention is installed in a housing unit.

[0168] 4 and 7, in a water purifier including a composite filter according to an embodiment of the present invention, a third upper cap member 1250 includes a third upward guide 1251 extending upward to form a third purified water flow path PC3, and a second partition wall 1112 may be disposed to extend in the axial direction a along the third upward guide 1251. At this time, although the second partition wall 1112 is formed to extend in the axial direction a along the third upward guide 1251, when the head member 1110 and the body member 1120 are coupled to each other, the second partition wall 1112 may be coupled to cover the outer surface of the third upward guide 1251, or may be coupled to be inserted into the inner surface of the third upward guide 1251, or may be coupled to the upper end of the third upward guide 1251. As such, the second partition wall 1112 is disposed to extend in the axial direction a along the third upward guide 1251, thereby preventing the outflowing third purified water C3 from mixing with the discharged domestic water W2, thereby improving the operational stability of the water purifier. The third upper cap member 1250 may be provided with a third downward guide 1252 extending downward. The post-treatment filter member 1060 is stably fixed through the third downward guide 1252 extending downward from the lower surface of the third upper cap member 1250, thereby improving the durability of the water purifier. In addition, at least two or more third support protrusions 1253 protruding outward in the radial direction r may be provided around the outer periphery of the third upward guide 1251, and the third support protrusions 1253 may be disposed at equal intervals. In other words, when such third support protrusions 1253 are formed to protrude, they support the inner surface of the upward upper guide 1221 formed on the guide upper cap 1220, thereby improving structural stability and securing the domestic water flow path PW2.When the third support protrusions 1253 are arranged at equal intervals, the domestic water W2 can move evenly, improving the flow of the domestic water W2 and thereby improving product reliability.

[0169] FIG. 8 is a diagram illustrating the overall water piping of a water purifier equipped with a composite filter according to an embodiment of the present invention.

[0170] 8, a water purifier equipped with a composite filter according to an embodiment of the present invention may further include a valve unit 1300 that controls the flow of raw water W1, purified water C, and domestic water W2, and a control unit 1400 that controls the operation of the valve unit 1300. The valve unit 1300 may include a first valve 1310 that controls the flow of raw water W1, a second valve 1320 that controls the flow of third purified water C3, and a third valve 1330 that controls the flow of domestic water W2. At this time, the input raw water W1 flows at a reduced pressure through a pressure reducing valve 1011. That is, the control unit 1400 controls the valve unit 1300 to control the flow of raw water W1, third purified water C3, and domestic water W2, effectively preventing backflow of these fluids and ensuring product reliability.

[0171] As described above, the water purifier having the composite filter according to an embodiment of the present invention is capable of receiving raw water W1 and discharging purified water C as well as discharging domestic water W2. Therefore, the composite filter is configured by integrating the reverse osmosis filter member 1050. However, the respective filters are modularized through the first module 1200A having the pre-treatment filter member 1040 and the reverse osmosis filter member 1050, and the second module 1200B having the post-treatment filter member 1060. The composite filter is configured by stacking the first module 1200A and the second module 1200B, which improves manufacturability. Three filter members are integrated into the housing 1100. Since the water purifier is provided with the first and second partition walls 1111 and 1112, the raw water W1 entering the upper part of the housing part 1100 moves to the first module 1200A through the outside of the guide member 1200C, and is not mixed with the purified water C passing through the inside of the second module 1200B, thereby ensuring the operational stability of the water purifier. Furthermore, the head member 1110 of the housing part 1100 is provided with the first and second partition walls 1111 and 1112 so that independent flow paths are formed in which the raw water W1, purified water C, and domestic water W2 do not mix, and the tubes through which the raw water W1, purified water C, and domestic water W2 flow are concentrated at the top of the composite filter, thereby improving the flexibility of the layout design of other parts.

[0172] Figure 9 is a structural diagram showing a water purifier equipped with a composite filter according to another embodiment of the present invention, Figure 10 is a plan view showing a head member of a water purifier equipped with a composite filter according to another embodiment of the present invention, Figure 11 is a cross-sectional view showing the first and second modules of a water purifier equipped with a composite filter according to another embodiment of the present invention disassembled, Figure 12 is a cross-sectional view showing the first and second modules of a water purifier equipped with a composite filter according to another embodiment of the present invention assembled, Figure 13 is a cross-sectional view showing the upper cap member and lower cap member of a water purifier equipped with a composite filter according to another embodiment of the present invention disassembled, Figure 14 is a cross-sectional view of part II of Figure 13, and Figure 15 is a cross-sectional view showing the filtration unit of a water purifier equipped with a composite filter according to another embodiment of the present invention installed in the housing unit.

[0173] As shown in Figures 9 to 12, a water purifier equipped with a composite filter according to the present invention includes a housing unit 2100 having a raw water inlet port 2010 through which raw water W1 is introduced, a purified water outlet port 2020 through which filtered purified water C is discharged, and a domestic water outlet port 2030 through which domestic water W2 produced during the filtration process is discharged, and a filtration unit 2200 disposed inside the housing unit 2100 and having a pre-treatment filter member 2040 that filters the raw water W1 to produce first purified water C1, a reverse osmosis filter member 2050 that filters the first purified water C1 to produce second purified water C2, and a post-treatment filter member 2060 that filters the second purified water C2 to produce third purified water C3. That is, raw water W1 input through the raw water inlet port 2010 is filtered sequentially through the pre-treatment filter member 2040, the reverse osmosis filter member 2050, and the post-treatment filter member 2060 provided in the filtration unit 2200. The finally filtered third purified water C3 can be discharged through the purified water outlet port 2020 and provided to the user. Alternatively, the water can be stored in a separate purified water storage unit or supplied to the cold water generator, hot water generator, and ice generator for producing cold water, hot water, and ice. Furthermore, domestic water W2 generated by the reverse osmosis filter member 2050 can be discharged to the outside of the housing unit 2100 through the domestic water outlet port 2030 and then discharged to the outside of the water purifier through a separate tube. By configuring the reverse osmosis filter member 2050 so that not only raw water W1 can be input and purified water C can be output, but also domestic water W2 can be discharged, it is possible to configure a composite filter by integrating the reverse osmosis filter member 2050. In this case, the pre-treatment filter member 2040 may be a pre-carbon filter or a microfiltration (MF) filter, and the post-treatment filter member 2060 may be a post-carbon filter or a microfiltration (MF) filter. Alternatively, the pre-treatment filter member 2040 and the post-treatment filter member 2060 may include an electrodeionization type filter. The electrodeionization type refers to EDI (Electro Deionization), CEDI (Continuous Electro Deionization), CDI (Capacitive Deionization), etc.In this case, a separate filter member may be provided on the outer surface of the pre-treatment filter member 2040. For example, this filter member may be an NT filter member. This NT filter member may be made of a material, such as a nanotrap material, that is electrostatically charged to adsorb foreign matter contained in the inflowing raw water W1. This material may be configured to be positively charged. Accordingly, negatively charged foreign matter contained in the raw water W1, such as viruses, bacteria, and fine particles, may be adsorbed to the NT filter member by static electricity. Alternatively, this filter member may be a sediment filter member.

[0174] The housing unit 2100 includes a head member 2110 having a first partition wall 2111 disposed on the outer side in the radial direction r to prevent the raw water W1 and the domestic water W2 from mixing, and a second partition wall 2112 disposed on the inner side in the radial direction r to prevent the domestic water W2 and the purified water C from mixing, and a body member 2120 extending from the head member 2110 and having a filtration unit 2200 disposed therein. The filtration unit 2200 includes a first module 2200A having a pre-treatment filter member 2040 and a reverse osmosis filter member 2050 sequentially disposed therein, and a second module 2200B disposed below the first module 2200A but having a post-treatment filter member 2060 disposed therein, and the second module 2200B includes a discharge tube member 2210 disposed through the center of the first module 2200A to allow the third purified water C3 to be discharged to the outside. That is, the composite filter is configured such that not only the incoming raw water W1 but also the outgoing third purified water C3 and the outgoing domestic water W2 enter the upper part of the composite filter and exit / discharge from the upper part. For this reason, the head member 2110 may be formed with a raw water region RW1, a third purified water region RC3, and a domestic water region RW2 through which the incoming raw water W1, the outgoing third purified water C3, and the outgoing domestic water W2 flow. A raw water flow path PW1 through which the incoming raw water W1 flows from the upper part is provided inside the housing unit 2100, and this raw water flow path PW1 extends to the first module 2200A. A first purified water flow path PC1 may be provided between the pre-treatment filter member 2040 and the reverse osmosis filter member 2050.As described above, the reverse osmosis filter element 2050 is integrated to form a composite filter, since raw water W1 can be input, purified water C can be output, and domestic water W2 can be discharged. However, each filter is modularized using a first module 2200A equipped with a pre-treatment filter element 2040 and a reverse osmosis filter element 2050, and a second module 2200B equipped with a post-treatment filter element 2060. The composite filter is constructed by stacking the first module 2200A and the second module 2200B. This allows each filter element to be modularized through a subassembly process, improving manufacturability. Furthermore, three filter elements are integrated into the housing 2100, making the water purifier more compact and easier to replace. In addition, the discharge tube member 2210 is disposed through the center of the first module 2200A so that the third purified water C3 generated from the second module 2200B disposed below can be discharged to the outside, preventing the third purified water C3 from mixing with the second purified water C2 and ensuring stable operation of the water purifier. Also, the head member 2110 of the housing part 2100 is provided with first and second partition walls 111 and 112 so that independent flow paths are formed in which the raw water W1, purified water C, and domestic water W2 do not mix, and therefore the tubes through which the raw water W1, purified water C, and domestic water W2 flow are concentrated above the composite filter, improving the flexibility of layout design for other parts.

[0175] As shown in Figures 11 and 12, in a water purifier equipped with a composite filter according to another embodiment of the present invention, the first module 2200A supports the reverse osmosis filter member 2050 in a spirally wound manner and includes a central tube 2051 having a first through hole 2051a formed therein so that the second purified water C2 can flow therethrough, and the discharge tube member 2210 is disposed to penetrate the center of the central tube 2051 but can be spaced a certain distance apart so that a second purified water flow path PC2 through which the second purified water C2 flows is formed between the central tube 2051 and the discharge tube member 2210. That is, the reverse osmosis filter member 2050 is spirally wound around the central tube 2051, and a first through-hole 2051a is formed therein to allow the second purified water C2 to flow into the second purified water flow path PC2 provided therein, and the discharge tube member 2210, which is inserted through the center of the central tube 2051, is spaced a predetermined distance from the central tube 2051 to stably maintain the second purified water flow path PC2 and ensure reliable operation through a smooth flow of the second purified water C2. The central tube 2051 supports the inner surface of the reverse osmosis filter member 2050 to ensure the structural stability of the reverse osmosis filter member 2050. As described above, when the reverse osmosis filter member 2050 is wound around the central tube 2051, it may be formed integrally with the reverse osmosis filter member 2050, but this is not necessarily limited thereto, and the reverse osmosis filter member 2050 may be formed integrally with the second lower cap member 2240 and then wound around the central tube 2051. At this time, a separate O-ring may be provided between the central tube 2051 and a second lower cap member 2240 (described later), which prevents the first purified water C1 from flowing into the second purified water flow path PC2.

[0176] 12 and 15, in a water purifier including a composite filter according to another embodiment of the present invention, the second partition wall 2112 may be disposed to extend in the axial direction a along the discharge tube member 2210. In this case, the second partition wall 2112 is formed to extend in the axial direction a along the discharge tube member 2210, and when the head member 2110 and the body member 2120 are coupled to each other, the second partition wall 2112 may be coupled in a manner that covers the outer surface of the discharge tube member 2210, the second partition wall 2112 may be coupled in a manner that the second partition wall 2112 is inserted into the inner surface of the discharge tube member 2210, or the second partition wall 2112 may be coupled in a manner that the second partition wall 2112 is attached to the upper end of the discharge tube member 2210. By disposing the second partition wall 2112 to extend in the axial direction a along the discharge tube member 2210 in this manner, the outflowing third purified water C3 is effectively prevented from mixing with the discharged domestic water W2, thereby improving the operational stability of the water purifier.

[0177] 11 and 12, in a water purifier equipped with a composite filter according to another embodiment of the present invention, a first module 2200A includes a first upper cap member 2220 having a reverse osmosis filter member 2050 disposed thereunder, and the first upper cap member 2220 may include a first upward guide 2221 disposed a predetermined distance from a central tube 2051 to form a domestic water flow path PW2 through which domestic water W2 is discharged. The first upward guide 2221 extends upward along the axial direction a parallel to the central tube 2051 to guide the discharged domestic water W2. In other words, the discharged domestic water W2 is discharged to the outside through the domestic water flow path PW2 formed between the first upward guide 2221 provided in the first upper cap member 2220 and the central tube 2051, preventing it from mixing with the raw water W1 or the first purified water C1, thereby improving the operational stability of the water purifier. At this time, spacers may extend downward from the underside of the first upper cap member 2220 to allow the domestic water W2 discharged to the upper end of the reverse osmosis filter member 2050 to move smoothly in the radial direction r. The provision of the spacers allows the first upper cap member 2220 and the reverse osmosis filter member 2050 to be spaced apart by a predetermined distance, thereby allowing the domestic water W2 to flow smoothly in the radial direction r. Although the spacers extend in the circumferential direction, a plurality of spacers may be spaced apart at equal intervals so that the discharged domestic water W2 can flow through them. The first upper cap member 2220 may also include a first downward guide 2222 extending downward along the axial direction a. The first downward guide 2222 stably supports the reverse osmosis filter member 2050, and the reverse osmosis filter member 2050 may be provided with a separate packing supported by the first downward guide 232.

[0178] 12 and 15, in a water purifier including a composite filter according to another embodiment of the present invention, a first partition wall 2111 may be disposed to extend in the axial direction a along a first upward guide 2221. In this case, although the first partition wall 2111 is formed to extend in the axial direction a along the first upward guide 2221, when the head member 2110 and the body member 2120 are coupled to each other, the first partition wall 2111 may be coupled in a manner that covers the outer surface of the first upward guide 2221, or the first partition wall 2111 may be coupled in a manner that is inserted into the inner surface of the first upward guide 2221, or the first partition wall 2111 may be coupled in a manner that is attached to the upper end of the first upward guide 2221. That is, since the first partition wall 2111 is extended in the axial direction a along the first upward guide 2221, the discharged domestic water W2 is not mixed with the incoming raw water W1, thereby improving the operational stability of the water purifier.

[0179] 11 and 12, in a water purifier equipped with a composite filter according to another embodiment of the present invention, a first module 2200A includes a second upper cap member 2230 and a second lower cap member 2240 to which a pre-treatment filter member 2040 is fixed, and a first upward guide 2221 may be disposed to penetrate the second upper cap member 2230. In this case, an auxiliary support protrusion 2232 for supporting the inner surface of the body member 2120 may be provided around the second upper cap member 2230. The auxiliary support protrusions 2232 protrude outward in the radial direction r from the outer circumferential surface of the second upper cap member 2230 to support the inner surface of the body member 2120, thereby ensuring a raw water flow path PW1 for raw water W1 entering the upper part of the housing unit 2100 to move to the filtration unit 2200. The auxiliary support protrusions 2232 are evenly spaced to allow the raw water W1 to move uniformly around the second upper cap member 2230, thereby improving the flow of raw water W1 and ensuring product reliability. The second upper cap member 2230 may be formed with a second downward guide 2231 extending downward along the axial direction a. The second downward guide 2231 may include a second-first downward guide 2231a disposed outward in the radial direction r to fix the pre-treatment filter member 2040, and a second-second downward guide 2231b disposed inward in the radial direction r to fix the reverse osmosis filter member 2050. That is, the filter members 40 and 50 are stably fixed through the second downward guides 2231 extending downward from the lower surface of the second upper cap member 2230, thereby improving the durability of the water purifier. In addition, the second lower cap member 2240 may be formed with a second upward guide 2241 extending upward along the axial direction a. The second upward guide 2241 may include a second-1 upward guide 2241a disposed on the outer side in the radial direction r to fix the pre-treatment filter member 2040, and a second-2 upward guide 2241b disposed on the inner side in the radial direction r to fix the reverse osmosis filter member 2050.That is, the filter members 40 and 50 are stably fixed through the second upward guides 2241 extending upward from the top surface of the second lower cap member 2240, thereby improving the durability of the water purifier, and the first module 2200A is sub-assembled through the second upper cap member 2230 and the second lower cap member 2240, allowing the filter members to be modularized, thereby improving operability. At this time, a separate O-ring may be provided between the first upper cap member 2220 and the second upper cap member 2230 to prevent the incoming raw water W1 and the first purified water C1 from mixing.

[0180] 11 and 12, a water purifier including a composite filter according to another embodiment of the present invention includes a connection tube 2250 connecting a second upper cap member 2230 and a second lower cap member 2240, and a second through-hole 2250a through which the first purified water C1 flows may be formed in the connection tube 2250. The second upper cap member 2230 and the second lower cap member 2240 are stably connected through the connection tube 2250, improving structural stability, and the first purified water C1 flows smoothly through the second through-hole 2250a formed in the connection tube 2250, ensuring operational stability of the water purifier. Such a connecting tube 2250 supports the inner surface of the pre-treatment filter member 2040 to ensure the structural stability of the pre-treatment filter member 2040, and when the pre-treatment filter member 2040 is configured to be wound around the connecting tube 2250, it may be formed integrally with the pre-treatment filter member 2040; however, this is not necessarily limited to this, and the pre-treatment filter member 2040 may also be configured to be wound around the connecting tube 2250 while being formed integrally with the second upper cap member 2230 and the second lower cap member 2240.

[0181] 11 and 12, in a water purifier equipped with a composite filter according to another embodiment of the present invention, a second module 2200B includes a third upper cap member 2260 and a third lower cap member 2270 to which a post-treatment filter member 2060 is fixed, and a discharge tube member 2210 may be disposed extending upward from the third upper cap member 2260. That is, the third upper cap member 2260 and the third lower cap member 2270 enable subassembly of the second module 2200B, improving workability. Furthermore, because the discharge tube member 2210 is disposed extending upward from the third upper cap member 2260, a third purified water flow path PC3 is stably formed during stacking of the first module 2200A and the second module 2200B, thereby ensuring operational stability of the water purifier. In this case, a third downward guide 2261 extending downward along the axial direction a may be formed on the third upper cap member 2260. The third downward guide 2261 may include a 3-1 downward guide 2261a that fixes the outer side of the post-treatment filter member 2060 in the radial direction r, and a 3-2 downward guide 2261b that fixes the inner side of the post-treatment filter member 2060 in the radial direction r. In addition, the third lower cap member 2270 may be formed with a third upward guide 2271 that extends upward along the axial direction a. The third upward guide 2271 may include a 3-1 upward guide 2271a that fixes the outer side of the post-treatment filter member 2060 in the radial direction r, and a 3-2 upward guide 2271b that fixes the inner side of the post-treatment filter member 2060 in the radial direction r. In other words, the post-treatment filter member 2060 is stably fixed by the third upward guide 2271 and the third downward guide 2261, thereby improving the durability of the water purifier.

[0182] 11 and 12, in a water purifier including a composite filter according to another embodiment of the present invention, the third upper cap member 2260 may be spaced a predetermined distance from the lower surface of the second lower cap member 2240 so that the second purified water flow path PC2 extends around the third upper cap member 2260. That is, the third upper cap member 2260 is spaced a predetermined distance from the lower surface of the second lower cap member 2240, and the second purified water flow path PC2 is formed between the third upper cap member 2260 and the second lower cap member 2240, allowing the second purified water C2 to flow smoothly, thereby ensuring stable operation of the water purifier.

[0183] 11 and 12, in a water purifier equipped with a composite filter according to another embodiment of the present invention, a second lower cap member 2240 may include a second downward lower guide 2242 disposed to surround the exterior of a second module 2200B. The second downward lower guide 2242 extends downward along the axial direction a and is spaced a predetermined distance from the outer surface of the second module 2200B so that a second purified water flow path PC2 is formed between the inner surface of the second downward lower guide 2242 and the outer surface of the second module 2200B. That is, to stack the first module 2200A and the second module 2200B, the second module 2200B is inserted into the second downward lower guide 2242 formed in the second lower cap member 2240, which facilitates assembly, thereby improving workability and structural stability.

[0184] Also, as shown in Figures 13 to 15, in a water purifier equipped with a composite filter according to another embodiment of the present invention, the third upper cap member 2260 includes at least two or more first support protrusions 2262 formed around the outer circumferential surface and protruding outward in the radial direction r, and the first support protrusions 2262 may be spaced apart from each other at equal intervals. As described above, the second downward lower guide 2242 is positioned a certain distance from the outer surface of the second module 2200B so that the second purified water flow path PC2 is formed between the inner surface of the second downward lower guide 2242 and the outer surface of the second module 2200B. In this state, the first support protrusions 2262 are formed to stably fix the second downward lower guide 2242 and the second module 2200B. As the first support protrusions 2262 are positioned to support the inner surface of the second downward lower guide 2242, the second purified water C2 can flow around the third upper cap member 2260 to secure the second purified water flow path PC2. As the first support protrusions 2262 are positioned at equal intervals, the second purified water C2 can move evenly around the third upper cap member 2260, improving the flow of the second purified water C2 and thereby improving product reliability. Meanwhile, an O-ring OR may be provided around the outer periphery of the third lower cap member 2270 to prevent the inflow of the raw water W1 and the outflow of the second purified water C2. A third purified water flow path PC3 through which the third purified water C3 flows may be formed in the center of the post-treatment filter member 2060.

[0185] Figure 16 is a cross-sectional view showing the first and second modules of a water purifier equipped with a composite filter according to another embodiment of the present invention in a disassembled state, Figure 17 is a cross-sectional view showing the first and second modules of a water purifier equipped with a composite filter according to another embodiment of the present invention in an assembled state, Figure 18 is a cross-sectional view showing the upper and lower cap members of a water purifier equipped with a composite filter according to another embodiment of the present invention in a disassembled state, Figure 19 is a cross-sectional view of part II-II of Figure 18, and Figure 20 is a cross-sectional view showing the filtration unit of a water purifier equipped with a composite filter according to another embodiment of the present invention installed in the housing unit.

[0186] 16 and 17, in a water purifier equipped with a composite filter according to another embodiment of the present invention, a second module 2200B includes a third upper cap member 2260 and a third lower cap member 2270 to which a post-treatment filter member 2060 is fixed, and a discharge tube member 2210 may be disposed extending upward from the third lower cap member 2270. That is, the third upper cap member 2260 and the third lower cap member 2270 enable subassembly of the second module 2200B, improving workability. Furthermore, because the discharge tube member 2210 is disposed extending upward from the third lower cap member 2270, a third purified water flow path PC3 is stably formed during stacking of the first module 2200A and the second module 2200B, thereby ensuring operational stability of the water purifier. In this case, a third downward guide 2261 extending downward along the axial direction a may be formed on the third upper cap member 2260. The third downward guide 2261 may include a 3-1 downward guide 2261a that fixes the outer side of the post-treatment filter member 2060 in the radial direction r, and a 3-2 downward guide 2261b that fixes the inner side of the post-treatment filter member 2060 in the radial direction r. In addition, the third lower cap member 2270 may be formed with a third upward guide 2271 that extends upward along the axial direction a. The third upward guide 2271 may include a 3-1 upward guide 2271a that fixes the outer side of the post-treatment filter member 2060 in the radial direction r, and a 3-2 upward guide 2271b that fixes the inner side of the post-treatment filter member 2060 in the radial direction r. In other words, the post-treatment filter member 2060 is stably fixed by the third upward guide 2271 and the third downward guide 2261, thereby improving the durability of the water purifier.

[0187] 16 and 17, in a water purifier including a composite filter according to another embodiment of the present invention, a discharge tube member 2210 is disposed to penetrate a third upper cap member 2260, and the third upper cap member 2260 may include a third upward upper guide 2263 spaced a predetermined distance from the discharge tube member 2210 to form a second purified water flow path PC2. That is, the third upward upper guide 2263 formed on the third upper cap member 2260 is spaced a predetermined distance from the discharge tube member 2210, and the second purified water flow path PC2 is formed between the third upward upper guide 2263 and the discharge tube member 2210, allowing the second purified water C2 to flow smoothly, thereby improving the operational stability of the water purifier. This third upward upper guide 2263 is connected to the connector member 2280 described later to improve structural stability, and a separate O-ring is provided on the outer circumferential surface of the third upward upper guide 2263 to prevent the second purified water C2 from accidentally leaking out, thereby ensuring the operational stability of the water purifier.

[0188] Also, as shown in Figures 16 and 17, a water purifier equipped with a composite filter according to another embodiment of the present invention includes a connector member 2280 that connects a first module 2200A and a second module 2200B to each other, and the connector member 2280 may include a connector body 2281 that is press-fitted and fixed inside the second lower cap member 2240, an upward rib 2282 extending upward from the connector body 2281 to connect with the central tube 2051, and a downward rib 2283 extending downward from the connector body 2281 to connect with the third upward upper guide 2263. That is, basically, the connector body 2281 of the connector member 2280 is press-fitted and fixed inside the second lower cap member 2240, and the upward rib 2282 extending upward from the connector body 2281 is coupled to the central tube 2051, and the downward rib 2283 extending downward from the connector body 2281 is coupled to the third upward upper guide 2263, thereby facilitating coupling of the first module 2200A and the second module 2200B and improving workability. Alternatively, assembly can be performed by first press-fitting and fixing the connector member 2280 into the second lower cap member 2240 of the first module 2200A, and then coupling the third upward upper guide 2263 of the second module 2200B to the downward rib 2283. At this time, O-rings may be provided on the outer circumferential surface of the connector body 2281 of the connector member 2280, the outer circumferential surface of the upward rib 2282, and the outer circumferential surface of the downward rib 2283 to prevent leakage of the first purified water C1 and the second purified water C2.

[0189] 16 and 17, a water purifier including a composite filter according to another embodiment of the present invention includes a cover lower cap 2290 surrounding the outside of the second module 2200B, and the cover lower cap 2290 may be arranged to be coupled to the second downward lower guide 2242. That is, the cover lower cap 2290 surrounding the outside of the second module 2200B can prevent the raw water W1 and the third purified water C3 from mixing, and the cover lower cap 2290 is coupled to the second downward lower guide 2242 formed on the second lower cap member 2240, which allows for easy assembly and improves workability. At this time, it is preferable that the inner surface of the cover lower cap 2290 and the outer surface of the second module 2200B are spaced apart at a certain distance so as to form a third purified water flow path PC3. In this state where the cover lower cap 2290 and the second module 2200B are spaced apart at a certain distance, a separate O-ring OR may be provided on the outer surface of the second downward lower guide 2242 and the outer surface of the third upper cap member 2260 to prevent leakage of the third purified water C3.

[0190] 18 to 20, in a water purifier including a composite filter according to another embodiment of the present invention, a third lower cap member 2270 includes at least two or more second support protrusions 2272 protruding outward in a radial direction r around its outer circumferential surface, and the second support protrusions 2272 may be spaced apart at equal intervals. That is, the third lower cap member 2270 has the second support protrusions 2272 protruding outward in the radial direction r around its outer circumferential surface, and the third lower cap member 2270 supports the inner surface of the cover lower cap 2290, thereby ensuring a third purified water flow path PC3 for the third purified water C3 to flow around the third lower cap member 2270. The second support protrusions 2272 are spaced apart at equal intervals, allowing the third purified water C3 to move uniformly around the third lower cap member 2270, thereby improving the flow of the third purified water C3 and improving product reliability. At this time, it is preferable that the third lower cap member 2270 is spaced apart from the upper surface of the cover lower cap 2290 by a predetermined distance so that the third purified water flow path PC3 is extended.

[0191] Figure 21 is a diagram illustrating the overall water piping of a water purifier equipped with a composite filter according to another embodiment of the present invention, and Figure 22 is a diagram illustrating the overall water piping of a water purifier equipped with a composite filter according to another embodiment of the present invention.

[0192] 21, a water purifier equipped with a composite filter according to another embodiment of the present invention may further include a valve unit 2300 that controls the flow of raw water W1, purified water C, and domestic water W2, and a control unit 2400 that controls the operation of the valve unit 2300. The valve unit 2300 may include a first valve 2310 that controls the flow of raw water W1, a second valve 2320 that controls the flow of third purified water C3, and a third valve 2330 that controls the flow of domestic water W2. In this case, the incoming raw water W1 flows at a reduced pressure through a pressure reducing valve 2011. That is, the control unit 2400 controls the valve unit 2300 to control the flow of raw water W1, third purified water C3, and domestic water W2, effectively preventing backflow of these fluids, thereby ensuring product reliability.

[0193] As shown in FIG. 22, a water purifier equipped with a composite filter according to another embodiment of the present invention may also be provided with a valve unit 2300 that switches on and off the flow of raw water W1, purified water C, and domestic water W2, and a control unit 2400 that controls the operation of the valve unit 2300. The valve unit 2300 includes a first valve 2310 that switches on and off the flow of raw water W1, a second valve 2320 that switches on and off the flow of third purified water C3, and a third valve 2330 that switches on and off the flow of domestic water W2. The control unit 2400 controls the valve unit 2300 to control the flows of raw water W1, third purified water C3, and domestic water W2, thereby effectively preventing backflow of these fluids and ensuring product reliability.

[0194] As described above, the water purifier having the composite filter according to another embodiment of the present invention is capable of receiving raw water W1, outputting purified water C, and discharging domestic water W2. Therefore, the composite filter is configured by integrating the reverse osmosis filter member 2050. However, the respective filters are modularized through a first module 2200A having a pre-treatment filter member 2040 and a reverse osmosis filter member 2050, and a second module 2200B having a post-treatment filter member 2060. The composite filter is configured by stacking the first module 2200A and the second module 2200B, which improves manufacturability. Three filter members are integrated into the housing 2100. Therefore, the water purifier can be easily miniaturized and replaced. In addition, the discharge tube member 2210 is disposed through the center of the first module 2200A so that the third purified water C3 generated from the second module 2200B disposed at the bottom can be discharged to the outside, preventing the third purified water C3 from mixing with the second purified water C2, thereby ensuring the operational stability of the water purifier. In addition, the head member 2110 of the housing part 2100 is provided with first and second partition walls 111 and 112 so that independent flow paths are formed in which the raw water W1, purified water C, and domestic water W2 do not mix, and therefore the tubes through which the raw water W1, purified water C, and domestic water W2 flow are concentrated at the top of the composite filter, improving the flexibility of the layout design of other parts.

[0195] Figure 23 is a structural diagram showing a water purifier equipped with a composite filter according to yet another embodiment of the present invention, Figure 24 is a plan view showing a head member of a water purifier equipped with a composite filter according to yet another embodiment of the present invention, Figure 25 is a cross-sectional view showing the assembled state of the filtration section of a water purifier equipped with a composite filter according to yet another embodiment of the present invention, and Figure 26 is a cross-sectional view showing the disassembled state of the upper cap member and lower cap member of a water purifier equipped with a composite filter according to yet another embodiment of the present invention.

[0196] As shown in Figures 23 to 26, a water purifier equipped with a composite filter according to the present invention includes a housing unit 3100 having a raw water inlet port 3010 through which raw water W1 is introduced, a purified water outlet port 3020 through which filtered purified water C is discharged, and a domestic water outlet port 3030 through which domestic water W2 produced during the filtration process is discharged, and a filtration unit 3200 having a pre-treatment filter member 3040 that filters the raw water W1 to produce first purified water C1, a spiral filter member 3050 that filters the first purified water C1 to produce second purified water C2, and a post-treatment filter member 3060 that filters the second purified water C2 to produce third purified water C3 and is stacked below the pre-treatment filter member 3040. That is, raw water W1 input through raw water inlet port 3010 moves to filtration unit 3200 through raw water flow path PW1, and is filtered sequentially through pre-treatment filter member 3040, spiral filter member 3050, and post-treatment filter member 3060 provided in filtration unit 3200, and the finally filtered third purified water C3 is discharged through purified water outlet port 3020 and provided to the user. Alternatively, the third purified water C3 may be stored in a separate purified water storage unit, or may be supplied to a cold water generator, a hot water generator, and an ice generator to generate cold water, hot water, and ice. In addition, the first purified water C1 moves downward to the spiral filter member 3050 through the first purified water flow path PC1 formed between the pre-treatment filter member 3040 and the spiral filter member 3050, and then moves into the spiral filter member 3050. The domestic water W2 generated when the first purified water C1 is filtered by the spiral filter member 3050 moves to the domestic water flow path PW2 and is discharged to the outside of the housing part 3100 through the domestic water discharge port 3030, and can then be discharged to the outside of the water purifier through a separate tube. In this way, by configuring the spiral filter member 3050 so that not only the raw water W1 can be input and the purified water C can be output, but also the domestic water W2 can be discharged, making it possible to form a composite filter by integrating the spiral filter member 3050, thereby improving user convenience.In this case, the pre-treatment filter member 3040 may be a pre-carbon filter or a microfiltration (MF) filter, and the post-treatment filter member 3060 may be a post-carbon filter or a microfiltration (MF) filter. Alternatively, the pre-treatment filter member 3040 and the post-treatment filter member 3060 may include an electrodeionization filter. The electrodeionization method includes EDI (Electro Deionization), CEDI (Continuous Electro Deionization), and CDI (Capacitive Deionization). A separate filter member may be provided on the outer surface of the pre-treatment filter member 3040. For example, this filter member may be an NT filter member. This NT filter member may be made of a material, such as a nanotrap material, that is electrostatically charged to adsorb foreign matter contained in the inflowing raw water W1. This material may be configured to be positively charged. Accordingly, negatively charged foreign matter contained in the raw water W1, such as viruses, bacteria, and fine particles, may be adsorbed to the NT filter member by static electricity. This filter member may also be a sediment filter member. The spiral filter element 3050 can be a reverse osmosis filter or a hollow desert filter.

[0197] 24, the housing unit 3100 includes a head member 3110 having a first partition wall 3111 for preventing mixing of raw water W1 and domestic water W2 and a second partition wall 3112 for preventing mixing of the third purified water C3 and domestic water W2, and a body member 3120 extending from the head member 3110 and having a filtration unit 3200 disposed therein. That is, the structure is such that not only the incoming raw water W1 but also the outgoing third purified water C3 and the outgoing domestic water W2 are outgoing / outgoing from the top of the composite filter, and therefore the head member 3110 is formed with a raw water region RW1 into which the raw water W1 is inflowed, a third purified water region RC3 into which the third purified water C3 is outflowed, and a domestic water region RW2 into which the domestic water W2 is outflowed. For this purpose, the head member 3110 of the housing part 3100 is provided with the first and second partition walls 3111 and 3112 described above so that independent flow paths are formed in which the raw water W1, the third purified water C3, and the domestic water W2 do not mix. As a result, the tubes through which the raw water W1, the third purified water C3, and the domestic water W2 flow are concentrated at the top of the composite filter, thereby improving the flexibility of the layout design of other parts.

[0198] 25 and 26 , the filtering unit 3200 includes a first upper cap member 3210 having a pre-treatment filter member 3040 disposed on the outer side in the radial direction r and a spiral filter member 3050 disposed on the inner side in the radial direction r disposed below it, and a second upper cap member 3220 having a post-treatment filter member 3060 disposed on the outer side in the radial direction r disposed below it but penetrating the spiral filter member 3050 disposed on the inner side in the radial direction r. The second upper cap member 3220 fixes the post-treatment filter member 3060 with the post-treatment filter member 3060 stacked below the pre-treatment filter member 3040. A first through-hole 3220a through which the spiral filter member 3050 penetrates may be formed in the second upper cap member 3220. In addition, a first downward support guide 3211 extending downward along the axial direction a may be formed in the first upper cap member 3210. The first downward support guide 3211 may include a 1-1 downward support guide 3211a disposed on the outer side in the radial direction r and a 1-2 downward support guide 3211b disposed on the inner side in the radial direction r to fix the pre-treatment filter member 3040. The second upper cap member 3220 may also be formed with a second downward support guide 3221 extending downward along the axial direction a. The second downward support guide 3221 may include a 2-1 downward support guide 3221a disposed on the outer side in the radial direction r and a 2-2 downward support guide 3221b disposed on the inner side in the radial direction r to fix the post-treatment filter member 3060. When the first downward support guide 3211 and the second downward support guide 3221 are formed in this manner, the pre-treatment filter member 3040 and the post-treatment filter member 3060 are stably fixed, thereby improving the durability of the water purifier. That is, in the filtration unit 3200, the pre-treatment filter member 3040 and the post-treatment filter member 3060 are stacked via the first upper cap member 3210 and the second upper cap member 3220, and the spiral filter member 3050 is arranged inside these filter members in the radial direction r, so that the composite filter can be manufactured using the pre-manufactured spiral filter member 3050, thereby improving manufacturability.Even if a new spiral filter element 3050 is manufactured, if the length in the axial direction a is increased, the same filtering performance can be ensured even if the thickness is reduced, and at the same time, the composite filter can be made slimmer.

[0199] FIG. 27 is a cross-sectional view illustrating a state in which a filtering unit of a water purifier having a composite filter according to yet another embodiment of the present invention is installed in a housing unit.

[0200] 25 and 26, in a water purifier equipped with a composite filter according to another embodiment of the present invention, a filtering unit 3200 includes a post-treatment filter member 3060, a second lower cap member 3230 having a spiral filter member 3050 fixed thereon, and a connecting pipe member 3240 disposed radially inward of the spiral filter member 3050 to prevent the second purified water C2 and the third purified water C3 from mixing. As shown in FIG. 27, a third purified water flow path PC3 is formed inside the connecting pipe member 3240, allowing the second purified water C2 to flow stably without being mixed with the second purified water C2 flowing inside the spiral filter member 3050, i.e., through a central tube 3051 (described later). That is, the filtration unit 3200 is provided with a second lower cap member 3230 that fixes the post-treatment filter member 3060 and the spiral filter member 3050, thereby improving the structural stability of the composite filter, and a connecting pipe member 3240 is provided inside the spiral filter member 3050 in the radial direction r, thereby preventing the outflowing third purified water C3 from mixing with the second purified water C2, thereby improving the water quality of the finally outflowing third purified water C3 and thereby increasing user satisfaction.

[0201] 25 and 26, in a water purifier equipped with a composite filter according to another embodiment of the present invention, the second lower cap member 3230 may include a pipe support guide 3231 extending upward to be connected to the connecting pipe member 3240. That is, the pipe support guide 3231 stably connects the second lower cap member 3230 and the connecting pipe member 3240, improving the structural stability of the composite filter and allowing the third purified water C3 to flow stably, thereby improving the operational stability of the water purifier.

[0202] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, a spiral filter member 3050 may include a central tube 3051 that supports the spiral filter member 3050 in a spirally wound state and has a second purified water through-hole 3051a formed therein so that the second purified water C2 can flow therethrough. In this case, as shown in FIG. 27, a connecting pipe member 3240 may be disposed to penetrate the center of the central tube 3051 but may be spaced a certain distance apart from the central tube 3051 so that a second purified water flow path PC2 through which the second purified water C2 flows is formed between the central tube 3051 and the connecting pipe member 3240. That is, the spiral filter member 3050 is arranged spirally around the central tube 3051, and a second purified water through-hole 3051a is formed so that the second purified water C2 flows into the second purified water flow path PC2 provided inside, and the connecting pipe member 3240 inserted through the center of the central tube 3051 is arranged at a certain distance from the central tube 3051, so that the second purified water flow path PC2 is stably maintained and the second purified water C2 flows smoothly, thereby improving the operational reliability of the water purifier.

[0203] 25 and 26, in a water purifier equipped with a composite filter according to another embodiment of the present invention, the filtering unit 3200 may be disposed below the spiral filter member 3050 and may include a third lower cap member 3250 through which a central tube 3051 passes so that the second purified water C2 flows downward. That is, since the third lower cap member 3250 is disposed below the spiral filter member 3050 and the central tube 3051 passes through the third lower cap member 3250, even if the first purified water C1 flows above the third lower cap member 3250, it is not mixed with the second purified water C2 flowing through the bottom of the third lower cap member 3250. This prevents deterioration in the quality of the second purified water C2 and improves the quality of the final discharged third purified water C3, thereby improving user satisfaction.

[0204] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, a third lower cap member 3250 may include a second through-hole 3250a through which a central tube 3051 is disposed. That is, since the central tube 3051 is disposed to pass through the second through-hole 3250a formed in the third lower cap member 3250, the penetration state of the central tube 3051 is stably maintained, improving the structural stability of the composite filter, and the second purified water C2 smoothly moves to the lower part of the third lower cap member 3250 through the penetration portion of the central tube 3051, thereby ensuring the operational reliability of the water purifier.

[0205] 25 and 26, in a water purifier equipped with a composite filter according to yet another embodiment of the present invention, the third lower cap member 3250 may include a third upward support guide 3251 extending upward to be disposed between the spiral filter member 3050 and the post-treatment filter member 3060. That is, since the third upward support guide 3251 is disposed between the spiral filter member 3050 and the post-treatment filter member 3060, it is possible to prevent a decrease in the quality of the second purified water C2 and improve the quality of the third purified water C3 that is finally discharged, thereby improving user satisfaction.

[0206] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, a second lower cap member 3230 may include a second upward support guide 3232 extending upward to securely position a post-treatment filter member 3060. The second upward support guide 3232 may be formed to extend upward along the axial direction a. The second upward support guide 3232 may include a second-first upward support guide 3232a disposed on the outer side in the radial direction r and a second-second upward support guide 3232b disposed on the inner side in the radial direction r to secure the post-treatment filter member 3060. When the second upward support guides 3232 are formed in this manner, the post-treatment filter member 3060 is stably secured, improving the structural stability of the composite filter.

[0207] 28 is a cross-sectional view of part II in FIG. 26, and FIG. 29 is a cross-sectional view of part II-II in FIG.

[0208] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, a second lower cap member 3230 includes a second downward guide 3233 extending downward, and the second downward guide 3233 may include a third through-hole 3233a through which the third purified water C3 flows after moving to the lower part of the second lower cap member 3230. At this time, the third purified water C3 filtered through the post-treatment filter member 3060 moves around the second lower cap member 3230 to the lower part of the second lower cap member 3230, and then moves inward in the radial direction r to be discharged to the outside through the connecting pipe member 3240. 28, the second lower cap member 3230 is formed with second support protrusions 3234 extending outward in the radial direction r, and the plurality of second support protrusions 3234 are spaced apart from one another and configured to support the inner surface of the fourth lower cap member 3280 (described later), thereby improving the structural stability of the composite filter and allowing the third purified water C3 to flow smoothly. That is, since the second downward guide 3233 supports the lower surface of the fourth lower cap member 3280, the separation state between the second lower cap member 3230 and the lower surface of the fourth lower cap member 3280 is stably maintained, and the third purified water C3 that has moved to the bottom of the second lower cap member 3230 moves smoothly through the third through-holes 3233a formed in the second downward guide 3233, ensuring the operational stability of the water purifier.

[0209] 25 and 26, in a water purifier equipped with a composite filter according to another embodiment of the present invention, a filtering unit 3200 may include a third upper cap member 3260 stacked on a first upper cap member 3210 so that a spiral filter member 3050 is fixedly disposed below the first upper cap member 3210. That is, the spiral filter member 3050 is stably fixed through the third upper cap member 3260, improving the structural stability of the composite filter. In addition, the spiral filter member 3050 is sub-assembled through the third upper cap member 3260 and the third lower cap member 3250, improving workability.

[0210] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, the third upper cap member 3260 may include a third upward guide 3261 extending upward so that domestic water W2 that has moved to the upper end of the spiral filter member 3050 is discharged to the outside. That is, the domestic water W2 that has moved to the upper end of the spiral filter member 3050 moves through the third upward guide 3261 and is then discharged to the outside, thereby ensuring stable discharge of the domestic water W2 and ensuring stable operation of the water purifier. In addition, the third upper cap member 3260 may be provided with a third downward support guide 3262 extending downward along the axial direction a to surround the spiral filter member 3050, and the spiral filter member 3050 may be provided with a separate packing PK supported by the third downward support guide 3262.

[0211] 25 and 26, in a water purifier equipped with a composite filter according to another embodiment of the present invention, a first partition wall 3111 may be disposed to extend in the axial direction a along a third upward guide 3261. Although the first partition wall 3111 is formed to extend in the axial direction a along the third upward guide 3261, when the head member 3110 and the body member 3120 are coupled to each other, the first partition wall 3111 may be coupled to cover the outer surface of the third upward guide 3261, or may be coupled to be inserted into the inner surface of the third upward guide 3261, or may be coupled to the upper end of the third upward guide 3261. In addition, the third upward guide 3261 is disposed at a predetermined distance from the central tube 3051 to allow the domestic water W2 to flow smoothly. That is, the first partition wall 3111 is extended in the axial direction a along the third upward guide 3261, thereby effectively preventing the discharged domestic water W2 from mixing with the incoming raw water W1, thereby improving the quality of the final third purified water C3 and thereby increasing user satisfaction.

[0212] 25 and 26, in a water purifier having a composite filter according to another embodiment of the present invention, the second partition wall body 3112 may be disposed to extend in the axial direction a along the connecting pipe member 3240. Although the second partition wall body 3112 is formed to extend in the axial direction a along the connecting pipe member 3240, when the head member 3110 and the body member 3120 are coupled to each other, the second partition wall body 3112 may be coupled in a manner that covers the outer surface of the connecting pipe member 3240, or the second partition wall body 3112 may be coupled in a manner that is inserted into the inner surface of the connecting pipe member 3240, or the second partition wall body 3112 may be coupled in a manner that is attached to the upper end of the connecting pipe member 3240. In other words, the second partition wall body 3112 is extended in the axial direction a along the connecting pipe member 3240, thereby effectively preventing the outflowing third purified water C3 from mixing with the discharged domestic water W2, thereby improving the water quality of the final outflowing third purified water C3 and thereby increasing user satisfaction.

[0213] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, a filtering unit 3200 may include a first lower cap member 3270 stacked on a second upper cap member 3220 so that a pre-treatment filter member 3040 is fixed thereon. The first lower cap member 3270 may be formed with a first upward support guide 3271 extending upward along the axial direction a. The first upward support guide 3271 may include a first-first upward support guide 3271a disposed on the outer side in the radial direction r and a first-second upward support guide 3271b disposed on the inner side in the radial direction r to fix the pre-treatment filter member 3040. When the first upward support guide 3271 is formed in this manner, the pre-treatment filter member 3040 is stably fixed, thereby improving the durability of the water purifier. That is, since the pre-treatment filter member 3040 can be fixed by disposing the first upper cap member 3210 and the first lower cap member 3270 on the top and bottom of the pre-treatment filter member 3040, respectively, the composite filter can be modularized through a subassembly process, improving workability. Furthermore, since the first lower cap member 3270 is stacked with the second upper cap member 3220, the stacked state of the pre-treatment filter member 3040 and the post-treatment filter member 3060 is stably maintained, improving the structural stability of the composite filter.

[0214] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, a first connection tube 3070 is provided on the outer side in the radial direction r to connect a first upper cap member 3210 and a first lower cap member 3270, and a raw water through hole 3070a through which raw water W1 flows may be formed in the first connection tube 3070. That is, the first upper cap member 3210 and the first lower cap member 3270 are stably connected through the first connection tube 3070, improving the structural stability of the composite filter, and raw water W1 flows smoothly through the raw water through hole 3070a formed in the first connection tube 3070, ensuring the operational stability of the water purifier. Such a first connecting tube 3070 supports the outer surface of the pre-treatment filter member 3040 for the structural stability of the pre-treatment filter member 3040, and may be formed integrally with the pre-treatment filter member 3040, but is not necessarily limited to this. It is also possible to configure the pre-treatment filter member 3040 to be positioned radially inward in the radial direction r while being formed integrally with the first upper cap member 3210 and the first lower cap member 3270.

[0215] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, a second connection tube 3080 is provided on the inside in the radial direction r to connect a first upper cap member 3210 and a first lower cap member 3270, and a first purified water through-hole 3080a through which the first purified water C1 flows may be formed in the second connection tube 3080. That is, the first upper cap member 3210 and the first lower cap member 3270 are stably connected through the second connection tube 3080, improving the structural stability of the composite filter, and the first purified water C1 flows smoothly through the first purified water through-hole 3080a formed in the second connection tube 3080, ensuring the operational stability of the water purifier. Such a second connecting tube 3080 supports the inner surface of the pre-treatment filter member 3040 for the structural stability of the pre-treatment filter member 3040, and may be formed integrally with the pre-treatment filter member 3040, but is not necessarily limited to this. It is also possible to configure the pre-treatment filter member 3040 to be positioned outward in the radial direction r while being formed integrally with the first upper cap member 3210 and the first lower cap member 3270.

[0216] 25 and 26, in a water purifier including a composite filter according to another embodiment of the present invention, a filtering unit 3200 includes a fourth lower cap member 3280 that supports a second lower cap member 3230 so as to be spaced apart from its upper surface, and the fourth lower cap member 3280 may include a fourth upward support guide 3281 that extends upward to simultaneously surround the second upper cap member 3220 and the second lower cap member 3230. That is, because the fourth lower cap member 3280 is spaced apart from the lower surface of the second lower cap member 3230, the third purified water C3 flows smoothly, and because the fourth upward support guide 3281 is simultaneously surrounded by the second upper cap member 3220 and the second lower cap member 3230, accidental outflow of the third purified water C3 and accidental inflow of raw water W1 are prevented, thereby ensuring stable operation of the water purifier. In this case, it is also possible to form the third purified water flow path PC3 using the body member 3120 of the housing part 3100 without using the fourth lower cap member 3280. In this case, it is preferable that a first support protrusion 3212 is formed around the first upper cap member 3210 on the outer side in the radial direction r.

[0217] FIG. 30 is a structural diagram illustrating the overall water piping of a water purifier equipped with a composite filter according to yet another embodiment of the present invention.

[0218] 30, a water purifier equipped with a composite filter according to another embodiment of the present invention may further include a valve unit 3300 that controls the flow of raw water W1, purified water C, and domestic water W2, and a control unit 3400 that controls the operation of the valve unit 3300. The valve unit 3300 may include a first valve 3310 that controls the flow of raw water W1, a second valve 3320 that controls the flow of third purified water C3, and a third valve 3330 that controls the flow of domestic water W2. In this case, the input raw water W1 flows at a reduced pressure through a pressure reducing valve 3011. That is, the flow of raw water W1, third purified water C3, and domestic water W2 can be controlled by controlling the valve unit 3300 through the control unit 3400, and backflow of these fluids can be effectively prevented, thereby improving product reliability.

[0219] As described above, the water purifier equipped with the composite filter according to another embodiment of the present invention is capable of not only inputting raw water W1 and outputting the third purified water C3 but also discharging the domestic water W2, and thus the user's convenience is improved by integrating the spiral filter member 3050 to form the composite filter. The head member 3110 of the housing part 3100 is provided with the first and second partition walls 3111 and 3112 so that the raw water W1, the third purified water C3, and the domestic water W2 are not mixed, and thus the raw water W1, the third purified water C3, and the domestic water W2 are separated. The tubes through which the domestic water W1 and domestic water W2 flow are concentrated at the top of the composite filter, improving the flexibility of the layout design of other parts. In the filtration section 3200, the pre-treatment filter member 3040 and the post-treatment filter member 3060 are stacked via the first upper cap member 3210 and the second upper cap member 3220, but by arranging the spiral filter member 3050 inside these filter members in the radial direction r, the composite filter can be manufactured using the pre-manufactured spiral filter member 3050, improving manufacturability.

[0220] Although one embodiment of the present invention has been described above, the concept of the present invention is not limited to the embodiment presented in this specification, and a person skilled in the art who understands the concept of the present invention may easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same concept, which may also be considered to fall within the scope of the concept of the present invention.

Claims

1. a housing portion 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 domestic water outlet port through which domestic water generated during the filtration process is discharged; and a filtration unit disposed inside the housing unit, the filtration unit including a pre-treatment filter member that filters the raw water to produce first purified water, a reverse osmosis filter member that filters the first purified water to produce second purified water, and a post-treatment filter member that filters the second purified water to produce third purified water; Including, the housing portion includes a head member provided with a first partition wall that prevents the raw water and the domestic water from mixing and a second partition wall that prevents the domestic water and the purified water from mixing; and a body member that extends from the head member and has the filtration portion disposed therein; the filtration unit includes a first module having the pre-treatment filter member and the reverse osmosis filter member sequentially disposed therein; a second module disposed on top of the first module and having the post-treatment filter member disposed therein; and a guide member disposed to surround the outside of the second module so that the raw water entering the upper part of the housing unit moves to the first module while bypassing the second module, The water purifier having a composite filter, wherein the guide member has a water flow path through which the water discharged to the outside of the first module moves.

2. the guide member includes a guide lower cap arranged to surround the second module, and a guide upper cap arranged outside the guide lower cap, 2. The water purifier having the composite filter according to claim 1, wherein the water flow path through which the water discharged to the outside of the first module flows is provided between the guide lower cap and the guide upper cap.

3. The guide upper cap includes an upward upper guide extending upward to form the domestic water flow path, 3. The water purifier according to claim 2, wherein the first partition wall is disposed to extend in an axial direction along the upward upper guide.

4. 3. The water purifier with a composite filter according to claim 2, wherein the first module includes a first upper cap member, the reverse osmosis filter member being fixed to a lower portion thereof, and a first through hole being formed therein so that the domestic water can be discharged to the outside of the first module.

5. the first module includes a second upper cap member, the pretreatment filter member being fixed to a lower portion thereof, and the reverse osmosis filter member being passed through the second upper cap member; The water purifier according to claim 2, wherein the guide upper cap extends to the second upper cap member.

6. the first module supports the reverse osmosis filter member in a spirally wound state and includes a central tube having a second through hole formed therein through which the second purified water flows; 3. The water purifier having a composite filter according to claim 2, wherein the central tube is disposed through the center of the guide lower cap so that the second purified water flows toward the second module.

7. 10. The water purifier having the composite filter according to claim 1, further comprising: a valve unit for controlling the flow of the raw water, the purified water, and the domestic water; and a control unit for controlling the operation of the valve unit.

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