Water purifier with composite filter

Abstract

The present invention relates to a water purifier having a composite filter, which is capable of not only raw water inlet, second purified water outlet, externally treated water inlet, and third purified water outlet, but also domestic water outlet, thereby enabling additional functions to be realized using external treatment members while raw water passes through the composite filter.

Description

[Technical field]

[0001] The present invention relates to a water purifier having a composite filter, which is capable of not only raw water inlet, second purified water outlet, externally treated water inlet, and third purified water outlet, but also domestic water outlet, thereby enabling additional functions to be realized using external treatment members while raw water passes through the composite filter. [Background technology]

[0002] Generally, a water purifier is a device that filters raw water to produce drinkable purified water for the user and provides the user with the purified water. Such a water purifier uses a combination of multiple filters to filter the raw water, but when the filters are used in combination, the layout inside the water purifier becomes complicated, and the volume occupied by the filters increases, which increases the overall volume of the water purifier. Therefore, in order to solve this problem, a composite filter in which the filters are integrated together may be used.

[0003] The water purifier disclosed in Korean Patent Publication No. 2021-0040502 by Coway Co., Ltd. is equipped with a composite filter for filtering raw water. The composite filter is provided with a first filter material and a second filter material, and each of these filter materials can be selected from known filter materials such as single filter elements, for example, sediment filters, pre-carbon filters, post-carbon filters, antibacterial filters, and various functional filters. However, such a composite filter is provided with only flow paths through which raw water, primary purified water, and secondary purified water flow, and does not have an external treatment member for further treating the first purified water that has been discharged, so that the realization of additional functions using such external treatment members is limited, and there is a problem that the reverse osmosis membrane filter cannot be integrated to be used as a composite filter because there is no flow path through which concentrated domestic water discharged using the reverse osmosis membrane filter flows.

[0004] Korean Patent Publication No. 2019-0060390 by Arcamedi Co., Ltd. discloses a conventional composite filter. In this composite filter, a carbon filter, a nano filter, and a calcium filter are integrally attached to an upper cap, and the raw water is filtered by passing through these filters in sequence. However, since this composite filter is configured to only allow sequential water treatment between the internal filters, there is a problem that the implementation of additional functions using external treatment members is limited in the process in which the raw water passes through the composite filter.

[0005] A composite filter for a water purifier disclosed in Korean Patent Publication No. 2003-0096867 by Woongjin Coway Co., Ltd. includes a composite filter for filtering raw water. The composite filter includes a first filter section in which a sediment filter is arranged on the outside and an ACF filter is arranged inside the sediment filter, a second filter section in which a flat ACF filter is arranged, and a third filter section in which an AC filter and a UF filter are arranged. When manufacturing the composite filter, the first to third filter sections are sequentially stacked inside a housing and then the caps are fused to manufacture the composite filter. However, when configured in this way, the process of stacking each filter section takes a lot of time, which reduces workability. In addition, 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, the tubes through which raw water and purified water flow are arranged at the top and bottom of the composite filter, respectively, which makes it difficult to install and replace the composite filter, complicates the layout, and reduces space efficiency.

[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, such a composite filter has a problem in that the raw water that enters is only passed through the above-mentioned filters in sequence, which limits the realization of additional functions using external treatment members. In addition, because the pre-treatment filter and the post-treatment filter are stacked inside the RO filter, it is not possible to use an RO filter with a general structure (a structure in which a membrane is wound around a central tube).

[0007] MIDEA GROUP CO LTD's China Registered Utility Model Publication No. 209307056 discloses a conventional composite filter, which is configured such that a PAC filter and a carbon filter are stacked inside an RO filter. However, even in the case of such a composite filter, since the raw water that enters is configured to pass through the above filters only in sequence, there are limitations on the realization of additional functions using external processing members, and since the PAC filter and the carbon filter are stacked inside the RO filter, there is a problem that an RO filter with a general structure (a structure in which a membrane is wound around a central tube) cannot be used. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Patent Publication No. 2021-0040502 [Patent Document 2] Korean Patent Publication No. 2019-0060390 [Patent Document 3] Korean Patent Publication No. 2003-0096867 [Patent Document 4] China Registered Utility Model No. 212151806 [Patent Document 5] China Registered Utility Model No. 209307056 Summary of the Invention [Problem to be solved by the invention]

[0009] In order to solve the above problems, a water purifier having a composite filter according to one embodiment of the present invention is capable of not only raw water inlet, second purified water outlet, externally treated water inlet, and third purified water outlet, but also domestic water outlet, thereby enabling the realization of additional functions using external treatment members in the process in which raw water passes through the composite filter. By integrating three internal filter members including a spirally wound type internal filter member to form a composite filter, the water purifier can be made compact and easily replaced, improving user convenience. In addition, by modularizing each filter using a first module having a pre-treatment internal filter member and a spirally wound type internal filter member and a second module having a post-treatment internal filter member, the first module The composite filter is constructed by stacking the first module and the second module, which improves manufacturability; 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 at the bottom can be discharged to the outside, so that the third purified water does not mix with the second purified water, ensuring the operational stability of the water purifier; and the head member of the housing part is provided with first to fourth partition walls so that independent flow paths are formed in which the raw water, the second purified water, the externally treated water, the third purified water, and the domestic water do not mix, so that the tubes through which the raw water, the second purified water, the externally treated water, the third purified water, and the domestic water flow are concentrated at the top of the composite filter, thereby improving the freedom of layout design of other parts.

[0010] In a water purifier with a composite filter according to one embodiment of the present invention, a spirally wound internal filter member is arranged in a spiral shape around a central tube, and a second purified water 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 arranged at a certain distance from the central tube, and the second purified water flow path is stably maintained while improving operational reliability through a smooth flow of the second purified water.

[0011] The water purifier with a composite filter according to one embodiment of the present invention aims to effectively prevent the outflowing third purified water from mixing with the outflowing second purified water by axially extending the fourth partition wall along the discharge tube member, thereby improving the operational stability of the water purifier.

[0012] The water purifier with a composite filter according to one embodiment of the present invention aims to effectively prevent the second purified water being discharged from mixing with the discharged domestic water by axially extending the third partition wall along the central tube, thereby improving the operational stability of the water purifier.

[0013] The water purifier with a composite filter according to one 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 or the outgoing second purified water, since the discharged domestic water is discharged to the outside through a domestic water flow path formed between a first upward guide provided on a first upper cap member and a central tube.

[0014] The water purifier with a composite filter according to one embodiment of the present invention aims to effectively prevent the incoming raw water from mixing with the outgoing domestic water by axially extending the second partition wall along the first upward guide, thereby improving the operational stability of the water purifier.

[0015] In a water purifier with a composite filter according to one embodiment of the present invention, a pre-treatment internal filter member can be fixed by disposing a first upper cap member and a first lower cap member on the upper and lower parts of the pre-treatment internal filter member, respectively, and thus, it is possible to modularize the first module through a subassembly process, thereby improving workability.

[0016] The water purifier with a composite filter according to one embodiment of the present invention aims to improve the structural stability by having an internal guide support the inner surface of the pre-treatment internal filter member, and to improve the operational stability of the water purifier by allowing the first purified water to flow smoothly inside through the first purified water through the first purified water through hole formed in the internal guide.

[0017] The water purifier with a composite filter according to one embodiment of the present invention aims to improve the structural stability of the first module by arranging an internal guide to connect the first upper cap member and the first lower cap member.

[0018] In a water purifier with a composite filter according to one embodiment of the present invention, an inner guide is disposed apart from an outer surface of a spiral-wound inner filter member, so that a first purified water flow path through which the first purified water flows is stably formed between them, and this first purified water flow path is extended to a lower portion of the spiral-wound inner filter member, so that the first purified water that moves to the inside through the first purified water through-holes formed in the inner guide stably moves to the lower portion of the spiral-wound inner filter member, thereby improving the operational stability of the water purifier.

[0019] In a water purifier with a composite filter according to one embodiment of the present invention, a second upper cap member is disposed spaced apart from the upper part of the first upper cap member, thereby stably forming a raw water flow path and ensuring a smooth flow of the incoming raw water, and a second downward support guide is extended to the first lower cap member, thereby preventing raw water that has entered the inside of the first module from flowing out to the outside of the first module and mixing with the incoming externally treated water, thereby preventing a deterioration in the quality of the externally treated water and the third purified water and improving user satisfaction.

[0020] A water purifier with a composite filter according to one embodiment of the present invention has first support protrusions formed around the outer circumferential surface of the first upper cap member and protruding radially outward. The first upper cap member supports the inner surface of the second upper cap member, thereby ensuring a raw water flow path for incoming raw water to flow around the first upper cap member. The first support protrusions are arranged at equal intervals, allowing raw water to move evenly in a circumferential direction of the first upper cap member, thereby improving the flow of raw water and thereby improving product reliability.

[0021] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the incoming raw water flows through a raw water flow path formed between the second upward guide provided on the second upper cap member and the first upward guide provided on the first upper cap member, so that the incoming raw water does not mix with the incoming external treated water or the outgoing domestic water, thereby improving the operational stability of the water purifier.

[0022] The water purifier with a composite filter according to one embodiment of the present invention aims to effectively prevent incoming raw water from mixing with incoming external treated water and improve the operational stability of the water purifier by axially extending the first partition wall along the second upward guide.

[0023] A water purifier with a composite filter according to one embodiment of the present invention enables subassembly of the second module using the third upper cap member and the third lower cap member, improving workability, and since a discharge tube member is arranged to extend upward from the third lower cap member and pass through the third upper cap member, a third purified water flow path is stably formed in the process of stacking the first module and the second module, thereby improving manufacturability.

[0024] A water purifier with a composite filter according to one embodiment of the present invention aims to improve manufacturability by simply connecting a first module and a second module in a manner in which, with a connector body of a connector member press-fitted into a first lower cap member, an upward rib extending upward from the connector body is connected to a central tube, and a downward rib extending downward from the connector body is connected to a third upper cap member.

[0025] In a water purifier with a composite filter according to one embodiment of the present invention, the third upward guide is formed to extend upward along the axial direction, making it easy to connect the connector member and the third upper cap member, thereby improving manufacturability. In particular, if the outer diameter of the third upward guide is formed to be the same as that of the central tube, the upward ribs and the downward ribs can be formed in mutually symmetrical shapes. Therefore, even if an operator flips the connector member over while connecting the first module and the second module using the connector member, a stable connection is possible, thereby improving manufacturability.

[0026] A water purifier equipped with a composite filter according to one embodiment of the present invention can control the flow of raw water, purified water, and domestic water by using a control unit to control the valve unit, and aims to improve product reliability by effectively preventing backflow of these fluids.

[0027] The water purifier having the composite filter according to another aspect of the present invention is capable of discharging domestic water as well as raw water inlet, first purified water outlet, second purified water inlet, and third purified water outlet. This allows for the implementation of additional functions using an external filter in the process in which raw water passes through the composite filter. The composite filter is configured by integrating a spiral-wound internal filter member such as a reverse osmosis membrane filter or a hollow fiber membrane filter, thereby improving user convenience. The head member of the housing is provided with first to fourth sections so that independent flow paths are formed in which the raw water, purified water, and domestic water are not mixed. By providing a partition wall, the tubes through which the raw water, purified water and domestic water flow are concentrated at the top of the composite filter, improving the freedom of layout design for other parts. In the filtration section, a first upper cap member and a second upper cap member are stacked, and a first through hole is formed in the first upper cap member so that the discharged domestic water flows through the domestic water flow path formed between the first upper cap member and the second upper cap member. This reduces the axial height of the composite filter, making it possible to make it more compact, and aims to improve manufacturability through simplified configuration.

[0028] In a water purifier with a composite filter according to another embodiment of the present invention, the first purified water that is discharged flows inside a first upward guide formed on a first upper cap member, and the discharged domestic water flows inside a second upward guide formed on a second upper cap member. The first and second upper cap members are spaced apart from each other by a certain distance to form a domestic water flow path, so that an independent flow path in which the first purified water and domestic water do not mix can be formed. The purpose of the water purifier is to improve manufacturability through a simplified configuration.

[0029] A water purifier with a composite filter according to another embodiment of the present invention has a spiral-wound type internal filter member stably fixed via a first downward guide extending downward from the underside of a first upper cap member, thereby improving the durability of the water purifier, and aims to improve the operational stability of the water purifier by configuring the domestic water produced using the spiral-wound type internal filter member to be discharged through a first through hole.

[0030] A water purifier with a composite filter according to another embodiment of the present invention is configured such that a third upper cap member and a fourth upper cap member are stacked and a post-treatment internal filter member is fixedly disposed at the bottom of the third upper cap member, and a second purified water entering from the outside flows through a second purified water flow path formed between the third upper cap member and the fourth upper cap member, thereby aiming to improve manufacturability through simplified configuration.

[0031] In a water purifier with a composite filter according to another embodiment of the present invention, the third purified water that flows out flows inside a third upward guide formed in the third upper cap member, and the second purified water that flows in flows inside a fourth upward guide formed in the fourth upper cap member. The third upper cap member and the fourth upper cap member are spaced apart from each other by a certain distance to form a second purified water flow path, so that an independent flow path in which the second purified water and the third purified water do not mix can be formed. The purpose of the water purifier is to improve manufacturability through simplified configuration.

[0032] A water purifier with a composite filter according to another embodiment of the present invention aims to improve durability of the water purifier by configuring the post-treatment internal filter member to be stably fixed via a third downward guide formed and extended downward from the underside of the third upper cap member.

[0033] In a water purifier with a composite filter according to another embodiment of the present invention, a fourth downward guide formed extending downward from the lower surface of the fourth upper cap member extends downward to surround the outer peripheral surface of the third upper cap member and is extended to the outer peripheral surface of the second upper cap member, so that the post-treatment internal filter member is stably fixed, thereby improving the durability of the water purifier.

[0034] In a water purifier with a composite filter according to another embodiment of the present invention, the post-treatment internal filter member is stably fixed through a lower guide formed by extending upward from the upper surface of the lower cap member, thereby improving the durability of the water purifier. Furthermore, since the post-treatment internal filter member can be fixed using the third and fourth upper cap members and the lower cap member, it is possible to modularize the composite filter through a subassembly process, thereby improving workability.

[0035] In a water purifier with a composite filter according to another embodiment of the present invention, a raw water flow path is formed between a body member and a spiral-wound internal filter member, and the spiral-wound internal filter member is separated from the bottom of the body member so that the raw water flow path extends to the bottom of the spiral-wound internal filter member, allowing raw water to move to the bottom of the spiral-wound internal filter member and then pass through the spiral-wound internal filter member. This aims to improve the operational stability of the water purifier by stably producing primary purified water and domestic water in a separated state.

[0036] A water purifier with a composite filter according to another embodiment of the present invention has a central tube provided on an inner surface of a spirally wound type internal filter member, and the spirally wound type internal filter member is arranged in a spirally wound shape, while a first purified water flow path formed inside the spirally wound type internal filter member is configured to be stably maintained, thereby aiming to improve operational reliability through a smooth flow of the first purified water.

[0037] In a water purifier with a composite filter according to another embodiment of the present invention, first support protrusions are formed around the outer circumferential surface of the fourth upper cap member, protruding radially outward and supporting the inner surface of the body member, thereby securing a raw water flow path so that raw water entering from the top of the housing part moves to the filtration part, and the first support protrusions are arranged at equal intervals, allowing raw water to move evenly around the fourth upper cap member, thereby improving the flow of raw water and thereby improving product reliability.

[0038] A water purifier equipped with a composite filter according to another embodiment of the present invention can control the valve unit using a control unit to control the flow of raw water, purified water, and domestic water, and aims to improve product reliability by effectively preventing backflow of these fluids.

[0039] A water purifier having a composite filter according to still another aspect of the present invention is capable of not only raw water inlet, first purified water outlet, externally treated water inlet, and third purified water outlet, but also domestic water outlet, so that an additional function can be realized using an external treatment member in the process in which raw water passes through the composite filter. The composite filter is configured by integrating a spiral-wound internal filter member, so that user convenience is improved. The head member of the housing part is provided with first to fourth partition walls so that independent flow paths in which the raw water, first purified water, externally treated water, third purified water, and domestic water are not mixed are formed. As a result, the tubes through which the raw water, first purified water, externally treated water, third purified water and domestic water flow are concentrated at the top of the composite filter, improving the freedom of layout design for other parts. In the filtration section, a pre-treatment internal filter member and a post-treatment internal filter member are stacked using a first upper cap member and a second upper cap member, and a spiral-wound internal filter member is arranged radially inward of these internal filter members, thereby enabling the composite filter to be manufactured using an already-manufactured spiral-wound internal filter member, thereby improving manufacturability.

[0040] In yet another embodiment of the present invention, a water purifier with a composite filter has a connecting tube provided on a second lower cap member that fixes the post-treatment internal filter member and the spiral-wound internal filter member, and this connecting tube is formed to extend along the axial direction inside the pre-treatment internal filter member and the post-treatment internal filter member, thereby preventing the first purified water that has passed through the pre-treatment internal filter member and the third purified water that has passed through the post-treatment internal filter member from mixing with the incoming externally treated water, thereby improving the operational stability of the water purifier.

[0041] In yet another embodiment of the present invention, a water purifier with a composite filter has a third upper cap member disposed below the first upper cap member and spaced apart from the first upper cap member so as to form a first purified water flow path through which the first purified water flows, thereby improving the operational stability of the water purifier by stably discharging the first purified water.

[0042] In yet another embodiment of the present invention, a water purifier with a composite filter has a first spacer extending downward from a lower surface of a first upper cap member and supporting an upper surface of a third upper cap member, thereby stably maintaining a separation distance between the first and third upper cap members and improving the structural stability of the composite filter.

[0043] In yet another embodiment of the present invention, a water purifier with a composite filter has a first upward guide and a third upward guide spaced apart from each other, thereby forming an extended first purified water flow path and smoothly discharging the first purified water, thereby improving the operational stability of the water purifier.

[0044] In yet another embodiment of the present invention, a water purifier with a composite filter has a first partition wall that is axially extended along a first upward guide, thereby effectively preventing the outflowing first purified water from mixing with the incoming raw water, and aims to improve user satisfaction by improving the water quality of the final outflowing third purified water.

[0045] In yet another embodiment of the present invention, a water purifier with a composite filter has a second partition wall that is axially extended along a third upward guide, thereby effectively preventing the outflowing first purified water from mixing with the incoming externally treated water, thereby preventing a decrease in the quality of the externally treated water and improving the quality of the third purified water that is finally outflowed, thereby improving user satisfaction.

[0046] In yet another embodiment of the present invention, a water purifier with a composite filter has a third downward support guide extending downward from the third upper cap member, which is connected to a connecting tube, thereby effectively preventing the outflowing first purified water from mixing with the incoming externally treated water, thereby preventing deterioration in the quality of the externally treated water and improving the quality of the third purified water that is finally outflowed, thereby improving user satisfaction.

[0047] In yet another embodiment of the present invention, a water purifier with a composite filter is provided in which a fourth upper cap member is disposed below the third upper cap member and spaced apart from the third upper cap member so as to form an external treated water flow path through which the external treated water flows, thereby stably flowing the external treated water and improving the operational stability of the water purifier.

[0048] In a water purifier with a composite filter according to yet another embodiment of the present invention, a second spacer extending downward from a lower surface of a third upper cap member supports an upper surface of a fourth upper cap member, thereby stably maintaining a separation distance between the third and fourth upper cap members and improving the structural stability of the composite filter.

[0049] In yet another embodiment of the present invention, a water purifier with a composite filter has a fourth upward guide disposed away from the third upward guide, thereby forming an external treated water flow path and allowing the incoming external treated water to flow smoothly, thereby improving the operational stability of the water purifier.

[0050] In yet another embodiment of the present invention, a water purifier with a composite filter is arranged such that the third partition wall is extended axially along the fourth upward guide, thereby effectively preventing the incoming externally treated water from mixing with the outgoing domestic water, thereby preventing a decrease in the quality of the externally treated water and improving the quality of the final outgoing third purified water, thereby improving user satisfaction.

[0051] A water purifier with a composite filter according to yet another embodiment of the present invention aims to improve the structural stability of the composite filter by supporting a spiral-wound internal filter element by a fourth downward support guide.

[0052] In yet another embodiment of the present invention, a water purifier with a composite filter has an improved structural stability since the second purified water moves into the inside of the central tube through the second purified water through hole while the spiral-wound type inner filter member is supported in a spirally wound manner around the central tube, and the central tube is disposed to penetrate the second lower cap member, so that the second purified water flows stably to the bottom of the second lower cap member, thereby improving the operational stability of the water purifier.

[0053] In yet another embodiment of the present invention, a water purifier with a composite filter has a second downward guide that supports the lower surface of the housing part, thereby stably maintaining the separation between the second lower cap member and the lower surface of the housing part, and the second purified water that has moved to the lower part of the second lower cap member moves smoothly through a third through hole formed in the second downward guide, thereby improving the operational stability of the water purifier.

[0054] In a water purifier with a composite filter according to yet another embodiment of the present invention, a pre-treatment internal filter member can be fixed by disposing a first upper cap member and a first lower cap member on the top and bottom of the pre-treatment internal filter member, respectively, which makes it possible to modularize the composite filter through a subassembly process and improves workability. A third spacer supported on the top surface of the second upper cap member is extended downwardly from the bottom surface of the first lower cap member, so that the gap between them is stably maintained and the third purified water flows smoothly, thereby improving the operational stability of the water purifier.

[0055] In yet another embodiment of the present invention, a water purifier with a composite filter has a fifth upper cap member disposed above the first upper cap member and spaced apart from the first upper cap member so as to form a raw water flow path through which raw water flows, thereby stabilizing the flow of raw water and improving the operational stability of the water purifier.

[0056] In yet another embodiment of the present invention, a water purifier with a composite filter has a fifth upward guide disposed away from the first upward guide, thereby forming a raw water flow path and allowing the input raw water to flow smoothly, thereby improving the operational stability of the water purifier.

[0057] In yet another embodiment of the present invention, a water purifier with a composite filter has a fourth partition wall body that is axially extended along a fifth upward guide, thereby effectively preventing the incoming externally treated water from mixing with the outgoing domestic water, thereby preventing a decrease in the quality of the externally treated water and improving the quality of the third purified water that is finally discharged, thereby improving user satisfaction.

[0058] In yet another embodiment of the present invention, a water purifier with a composite filter has a fifth downward support guide extended from the first upper cap member to the first lower cap member, thereby preventing the incoming raw water and the outgoing third purified water from mixing, thereby improving the operational stability of the water purifier.

[0059] A water purifier equipped with a composite filter according to yet another embodiment of the present invention can control the valve unit using a control unit to control the flow of raw water, first purified water, externally treated water, third purified water, and domestic water, and aims to improve product reliability by effectively preventing backflow of these fluids. [Means for solving the problem]

[0060] In order to achieve the above object, a water purifier having a composite filter according to one aspect of the present invention includes a housing part having a raw water inlet port through which raw water enters, a second purified water outlet port through which filtered second purified water exits, an external treated water inlet port through which external treated water generated by treating the second purified water externally enters, a third purified water outlet port through which filtered third purified water exits, and a domestic water outlet port through which domestic water generated during the filtration process is discharged, a pre-treatment internal filter member disposed inside the housing part to filter the raw water to generate first purified water, a spiral wound type internal filter member disposed inside the housing part to filter the first purified water to generate second purified water, an external treatment member disposed outside the housing part to treat the second purified water to generate the external treated water, and an external treatment member disposed inside the housing part to filter the input external treated water to generate the third purified water. and a filtration unit having a post-treatment internal filter member disposed in a first direction and a second direction, the housing unit including a head member having a first partition wall for preventing the raw water and the external treated water from being mixed, a second partition wall for preventing the raw water and the domestic water from being mixed, a third partition wall for preventing the second purified water and the domestic water from being mixed, and a fourth partition wall for preventing the second purified water and the third purified water from being mixed, and a body member extending from the head member and having the filtration unit disposed therein, the filtration unit including a first module having the pre-treatment internal filter member and the spiral wound type internal filter member disposed in sequence, and a second module stacked under the first module and including the post-treatment internal filter member, the second module including a discharge tube member disposed through a center of the first module so that the third purified water can be discharged to the outside.

[0061] In a water purifier with a composite filter according to an embodiment of the present invention, the first module includes a central tube that supports the spirally wound internal filter member in a spirally wound manner and has a second purified water through hole formed therein so that the second purified water flows therein, and the discharge tube member is disposed to penetrate the center of the central tube and is disposed at a predetermined distance apart so that a second purified water flow path through which the second purified water flows is formed between the central tube and the discharge tube member.

[0062] In the water purifier having the composite filter according to an embodiment of the present invention, the fourth partition wall is disposed to extend in an axial direction along the discharge tube member.

[0063] In the water purifier having the composite filter according to an embodiment of the present invention, the third partition wall is disposed to extend in an axial direction along the central tube.

[0064] In a water purifier with a composite filter according to one embodiment of the present invention, the first module includes a first upper cap member having the pre-treatment internal filter member disposed radially outward and the spiral-wound internal filter member disposed radially inward, and the first upper cap member includes a first upward guide disposed a certain distance away from the central tube to form a domestic water flow path through which the discharged domestic water flows.

[0065] In the water purifier having the composite filter according to an embodiment of the present invention, the second partition wall is disposed to extend in an axial direction along the first upward guide.

[0066] In the water purifier with a composite filter according to an embodiment of the present invention, the first module further includes a first lower cap member to which the pre-treatment internal filter member is fixed.

[0067] In the water purifier with a composite filter according to one embodiment of the present invention, the first module further includes an internal guide that supports an inner surface of the pre-treatment internal filter member and has a first purified water through hole formed therein so that the first purified water can flow therein.

[0068] In the water purifier with the composite filter according to an embodiment of the present invention, the inner guide is disposed to connect the first upper cap member and the first lower cap member.

[0069] In a water purifier with a composite filter according to an embodiment of the present invention, the inner guide is disposed spaced apart from an outer surface of the spiral-wound inner filter member such that a first purified water flow path through which the first purified water flows is extended to a lower portion of the spiral-wound inner filter member.

[0070] In a water purifier with a composite filter according to an embodiment of the present invention, the first module further includes a second upper cap member that is stacked on top of the first upper cap member and spaced apart from the first upper cap member to form a raw water flow path, and the second upper cap member includes a second downward support guide that is extended to the first lower cap member.

[0071] In a water purifier with a composite filter according to an embodiment of the present invention, the first upper cap member includes at least two first support protrusions formed protruding radially outward around an outer circumferential surface, and the first support protrusions are disposed at equal intervals apart from each other.

[0072] In a water purifier with a composite filter according to an embodiment of the present invention, the second upper cap member includes a second upward guide disposed at a predetermined distance from the first upward guide so as to form a raw water flow path through which the incoming raw water flows.

[0073] In the water purifier having the composite filter according to an embodiment of the present invention, the first partition wall is disposed to extend in an axial direction along the second upward guide.

[0074] In a water purifier 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 in which the post-treatment internal filter member is fixedly disposed, and the discharge tube member is disposed to extend upward from the third lower cap member and penetrate the third upper cap member.

[0075] In a water purifier with a composite filter according to one embodiment of the present invention, a connector member is provided to interconnect the first module and the second module, and the connector member includes a connector body press-fitted into the inside of the first 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 upper cap member.

[0076] In a water purifier with a composite filter according to one embodiment of the present invention, the third upper cap member includes a third upward guide extending upward along the axial direction to be coupled to an inner surface of the downward rib, and the third upward guide has the same outer diameter as the central tube.

[0077] The water purifier having a composite filter according to one embodiment of the present invention further includes a valve unit that adjusts the flow of the raw water, the second purified water, the externally treated water, the third purified water, and the domestic water, and a control unit that controls the operation of the valve unit.

[0078] According to another aspect of the present invention, a water purifier having a composite filter includes a housing portion having a raw water inlet port through which raw water enters, a first purified water outlet port through which filtered first purified water exits, a second purified water inlet port through which second purified water filtered externally enters, a third purified water outlet port through which filtered third purified water exits, and a domestic water outlet port through which domestic water generated during the filtration process is discharged; and a filtration portion including: a spiral-wound internal filter member disposed inside the housing portion to filter the raw water to generate the first purified water; an external filter member disposed outside the housing portion to filter the first purified water to generate the second purified water; and a post-treatment internal filter member disposed inside the housing portion to filter the second purified water to generate the third purified water, wherein the housing portion includes a first partition wall body that prevents the raw water and the second purified water from being mixed, and a filter member that filters the second purified water and the third purified water. the domestic water discharged from the spiral-wound internal filter member flows into the domestic water flow path, and the domestic water discharged from the spiral-wound internal filter member flows into the domestic water flow path. The domestic water discharged from the spiral-wound internal filter member flows into the domestic water flow path. The domestic water discharged from the spiral-wound internal filter member flows into the domestic water flow path. The domestic water discharged from the spiral-wound internal filter member flows into the domestic water flow path.

[0079] In a water purifier with a composite filter according to another embodiment of the present invention, the first upper cap member includes a first upward guide extending upward so that the first purified water flows, and the second upper cap member includes a second upward guide extending upward so that the domestic water flows, and the first upward guide and the second upward guide are disposed at a predetermined distance from each other so that the domestic water flow path is extended.

[0080] In a water purifier with a composite filter according to another embodiment of the present invention, the first upper cap member includes a first downward guide extending downward to fix the spiral-wound inner filter member therein.

[0081] In a water purifier with a composite filter according to another embodiment of the present invention, the filtration unit includes a third upper cap member that is stacked and fixed so that the post-treatment internal filter member is disposed on top of the second upper cap member, and a fourth upper cap member that is spaced a certain distance from an upper surface of the third upper cap member to provide a second purified water flow path through which the second purified water entering from the outside flows.

[0082] In a water purifier with a composite filter according to another embodiment of the present invention, the third upper cap member includes a third upward guide extending upward so that the third purified water flows, and the fourth upper cap member includes a fourth upward guide extending upward so that the second purified water flows, and the third upward guide and the fourth upward guide are disposed at a predetermined distance from each other so that the second purified water flow path is extended.

[0083] In a water purifier with a composite filter according to another embodiment of the present invention, the third upper cap member includes a third downward guide extending downward to fix the post-treatment internal filter member.

[0084] In a water purifier with a composite filter according to another embodiment of the present invention, the fourth upper cap member includes a fourth downward guide extending downward to surround an outer circumferential surface of the third upper cap member, and the fourth downward guide is disposed to extend to an outer circumferential surface of the second upper cap member.

[0085] In a water purifier with a composite filter according to another embodiment of the present invention, the filtering unit further includes a lower cap member having a lower guide extending upward so that the post-treatment internal filter member is fixedly disposed on the upper portion.

[0086] In a water purifier with a composite filter according to another embodiment of the present invention, a raw water flow passage through which the raw water flows is provided between an inner peripheral surface of the body member and an outer peripheral surface of the spiral-wound internal filter member, and the spiral-wound internal filter member is disposed spaced apart from a lower surface of the body member such that the raw water flow passage extends radially inward to a lower portion of the spiral-wound internal filter member.

[0087] In a water purifier with a composite filter according to another embodiment of the present invention, an inner peripheral surface of the spiral-wound type internal filter member is provided with a central tube that supports the spiral-wound type internal filter member so that the spiral-wound type internal filter member is wound in a spiral shape and has a second through hole formed therein so that the first purified water flows into a first purified water flow path formed inside the spiral-wound type internal filter member.

[0088] In a water purifier with a composite filter according to another embodiment of the present invention, the fourth upper cap member includes at least two first support protrusions formed protruding radially outward around an outer circumferential surface, and the first support protrusions are disposed at equal intervals apart from each other.

[0089] According to another embodiment of the present invention, the water purifier having the composite filter further includes a valve unit that adjusts 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.

[0090] According to yet another aspect of the present invention, a water purifier having a composite filter includes a housing portion having a raw water inlet port through which raw water enters, a first purified water outlet port through which filtered first purified water exits, an external treated water inlet port through which external treated water produced by treating the first purified water externally enters, a third purified water outlet port through which filtered third purified water exits, and a domestic water outlet port through which domestic water produced during the filtration process is discharged, a pre-treatment internal filter member disposed inside the housing portion to filter the raw water to produce the first purified water, an external treatment member disposed outside the housing portion to treat the first purified water to produce the external treated water, a spiral wound type internal filter member disposed inside the housing portion to filter the external treated water to produce second purified water, and a filter member disposed inside the housing portion and configured to filter the second purified water to produce the third purified water. the housing portion includes a head member having a first partition wall preventing the raw water and the first purified water from being mixed, a second partition wall preventing the first purified water and the externally treated water from being mixed, a third partition wall preventing the externally treated water and the domestic water from being mixed, and a fourth partition wall preventing the third purified water and the raw water from being mixed; and a body member extending from the head member and having the filtration portion disposed therein, the filtration portion including a first upper cap member having the pre-treatment internal filter member disposed radially outward and the spiral-wound internal filter member disposed radially inward disposed at a lower portion thereof, and a second upper cap member having the post-treatment internal filter member disposed radially outward disposed at a lower portion thereof and having the spiral-wound internal filter member disposed radially inward disposed therethrough.

[0091] In a water purifier with a composite filter according to yet another embodiment of the present invention, the filtration unit further includes a second lower cap member having the post-treatment internal filter member and the spiral-wound internal filter member fixed thereto, and the second lower cap member is disposed radially outside the spiral-wound internal filter member and includes a connecting tube that prevents the first purified water and the third purified water from mixing with the external treated water.

[0092] In a water purifier with a composite filter according to yet another embodiment of the present invention, the filtering unit further includes a third upper cap member that is stacked under the first upper cap member and spaced apart from the first upper cap member so that the first purified water is discharged to the outside through a first purified water flow path.

[0093] In a water purifier with a composite filter according to yet another embodiment of the present invention, a first spacer is provided on a lower surface of the first upper cap member, extending downward to support an upper surface of the third upper cap member.

[0094] In a water purifier with a composite filter according to yet another embodiment of the present invention, the first upper cap member includes a first upward guide extending upward, and the third upper cap member includes a third upward guide extending upward, the first upward guide and the third upward guide being spaced apart from each other to form the first purified water flow path.

[0095] In a water purifier having a composite filter according to still another embodiment of the present invention, the first partition wall is disposed to extend in an axial direction along the first upward guide.

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

[0097] In a water purifier with a composite filter according to yet another embodiment of the present invention, the third upper cap member includes a third downward support guide extending downward to be connected to the connecting tube to prevent the first purified water from being mixed with the external treated water.

[0098] In a water purifier with a composite filter according to yet another embodiment of the present invention, the filtration unit further includes a fourth upper cap member that is stacked under the third upper cap member and spaced apart from the third upper cap member so that the external treated water flows through an external treated water flow path.

[0099] In a water purifier with a composite filter according to yet another embodiment of the present invention, a second spacer is provided on a lower surface of the third upper cap member, extending downward to support an upper surface of the fourth upper cap member.

[0100] In a water purifier with a composite filter according to yet another embodiment of the present invention, the fourth upper cap member includes a fourth upward guide extending upward, and the fourth upward guide is disposed spaced apart from the third upward guide so as to form the external treated water flow path.

[0101] In a water purifier having a composite filter according to still another embodiment of the present invention, the third partition wall is disposed to extend in an axial direction along the fourth upward guide.

[0102] In a water purifier with a composite filter according to yet another embodiment of the present invention, the fourth upper cap member includes a fourth downward support guide extending downward along the axial direction to surround the spiral-wound inner filter member.

[0103] In a water purifier with a composite filter according to yet another embodiment of the present invention, the filtering unit further includes a central tube that supports the spirally wound type inner filter member so that it is wound in a spiral shape and has a second purified water through hole formed therein so that the second purified water flows therein, and the second lower cap member includes a second through hole through which the central tube is disposed to pass so that the second purified water flowing through the central tube flows downward.

[0104] In a water purifier 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 second purified water moves to a lower portion of the second lower cap member flows.

[0105] In a water purifier with a composite filter according to yet another embodiment of the present invention, the filtering unit further includes a first lower cap member to which the pre-treatment internal filter member is fixed, and the first lower cap member includes a third spacer that is stacked on top of the second upper cap member and extends downward to be supported on an upper surface of the second upper cap member so as to form a third purified water flow path through which the third purified water flows.

[0106] In a water purifier with a composite filter according to yet another embodiment of the present invention, the filtering unit further includes a fifth upper cap member that is stacked on top of the first upper cap member and spaced apart from the first upper cap member so that the raw water flows through a raw water flow path, and the fifth upper cap member includes a fourth spacer extending downward to be supported on an upper surface of the first upper cap member.

[0107] In a water purifier with a composite filter according to yet another embodiment of the present invention, the fifth upper cap member includes a fifth upward guide extending upward, and the fifth upward guide is disposed spaced apart from the first upward guide so as to form the raw water flow path.

[0108] In a water purifier having a composite filter according to still another embodiment of the present invention, the fourth partition wall is disposed to extend in an axial direction along the fifth upward guide.

[0109] In a water purifier with a composite filter according to yet another embodiment of the present invention, the fifth upper cap member includes a fifth downward support guide extending downward, and the fifth downward support guide is extended to the first lower cap member.

[0110] According to yet another embodiment of the present invention, the water purifier having a composite filter further includes a valve unit that adjusts the flow of the raw water, the first purified water, the externally treated water, the third purified water, and the domestic water, and a control unit that controls the operation of the valve unit. Effect of the Invention

[0111] With the above-mentioned configuration, the water purifier having the composite filter according to one embodiment of the present invention is capable of not only raw water inlet, second purified water outlet, externally treated water inlet, and third purified water outlet, but also domestic water outlet, so that an additional function can be realized using an external treatment member in the process in which raw water passes through the composite filter. By integrating three internal filter members including a spiral-wound type internal filter member to form a composite filter, the water purifier can be made compact and easily replaced, improving user convenience. In addition, by modularizing each filter using a first module having a pre-treatment internal filter member and a spiral-wound type internal filter member and a second module having a post-treatment internal filter member, the first module and the second module can be easily replaced. Since the composite filter is constructed by stacking two modules, manufacturability is improved, and since 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 at the bottom can be discharged to the outside, the third purified water does not mix with the second purified water, ensuring the operational stability of the water purifier. In addition, the head member of the housing part is provided with first to fourth partition walls so that independent flow paths are formed in which the raw water, second purified water, externally treated water, third purified water and domestic water do not mix, and the tubes through which the raw water, second purified water, externally treated water, third purified water and domestic water flow are concentrated at the top of the composite filter, providing the effect of improving the freedom of layout design of other parts.

[0112] In a water purifier with a composite filter according to one embodiment of the present invention, a spirally wound internal filter member is arranged in a spiral shape 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 discharge tube member inserted through the center of the central tube is arranged at a certain distance from the central tube, thereby providing an effect of improving operational reliability through a smooth flow of the second purified water while stably maintaining the second purified water flow path.

[0113] In a water purifier having a composite filter according to an embodiment of the present invention, the fourth partition wall is axially extended along the discharge tube member, thereby effectively preventing the third purified water from being mixed with the second purified water, thereby improving the operational stability of the water purifier.

[0114] In the water purifier with the composite filter according to one embodiment of the present invention, the third partition wall is axially extended along the central tube, thereby effectively preventing the second purified water from being mixed with the discharged domestic water, thereby improving the operational stability of the water purifier.

[0115] In the water purifier with a composite filter according to one 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 on the first upper cap member and the central tube, preventing the domestic water from mixing with the incoming raw water or the outgoing second purified water, thereby improving the operational stability of the water purifier.

[0116] In a water purifier equipped with a composite filter according to an embodiment of the present invention, the second partition wall is axially extended along the first upward guide, thereby effectively preventing the incoming raw water from mixing with the outgoing domestic water, thereby improving the operational stability of the water purifier.

[0117] A water purifier with a composite filter according to one embodiment of the present invention can fix a pre-treatment internal filter member by disposing a first upper cap member and a first lower cap member on the upper and lower parts of the pre-treatment internal filter member, respectively, thereby enabling modularization of a first module through a subassembly process, thereby improving workability.

[0118] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the structural stability is improved since the inner guide supports the inner surface of the pre-treatment inner filter member, and the first purified water flows smoothly inside through the first purified water through-hole formed in the inner guide, thereby improving the operational stability of the water purifier.

[0119] A water purifier with a composite filter according to one embodiment of the present invention provides an effect of improving the structural stability of the first module by arranging an internal guide to connect the first upper cap member and the first lower cap member.

[0120] In a water purifier with a composite filter according to an embodiment of the present invention, an inner guide is disposed apart from an outer surface of a spiral-wound inner filter member, so that a first purified water flow path through which the first purified water flows is stably formed between them, and this first purified water flow path is extended to a lower portion of the spiral-wound inner filter member, so that the first purified water that moves to the inside through the first purified water through-holes formed in the inner guide moves stably to the lower portion of the spiral-wound inner filter member, thereby providing an effect of improving the operational stability of the water purifier.

[0121] In a water purifier with a composite filter according to one embodiment of the present invention, a raw water flow path is stably formed by disposing a second upper cap member at a distance from an upper portion of the first upper cap member, thereby ensuring a smooth flow of the incoming raw water. Since a second downward support guide is extended to the first lower cap member, raw water entering the inside of the first module is prevented from flowing out of the first module and being mixed with the incoming externally treated water, thereby preventing deterioration of the quality of the externally treated water and the third purified water and providing an effect of improving user satisfaction.

[0122] In a water purifier with a composite filter according to an embodiment of the present invention, first support protrusions are provided around the outer circumferential surface of the first upper cap member, protruding radially outward. The first upper cap member supports the inner surface of the second upper cap member, thereby ensuring a raw water flow path for the incoming raw water to flow around the first upper cap member. The first support protrusions are arranged at equal intervals, allowing the raw water to move evenly around the first upper cap member, thereby improving the flow of raw water and providing the effect of improving product reliability.

[0123] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the incoming raw water flows through a raw water flow path formed between the second upward guide provided on the second upper cap member and the first upward guide provided on the first upper cap member, so that the incoming raw water does not mix with the incoming external treated water or the outgoing domestic water, thereby providing an effect of improving the operational stability of the water purifier.

[0124] In a water purifier equipped with a composite filter according to one embodiment of the present invention, the first partition wall is axially extended along the second upward guide, thereby effectively preventing incoming raw water from mixing with incoming externally treated water, thereby improving the operational stability of the water purifier.

[0125] A water purifier with a composite filter according to one embodiment of the present invention enables subassembly of the second module using the third upper cap member and the third lower cap member, improving workability, and since a discharge tube member is arranged to extend upward from the third lower cap member and pass through the third upper cap member, a third purified water flow path is stably formed in the process of stacking the first module and the second module, thereby improving manufacturability.

[0126] A water purifier with a composite filter according to one embodiment of the present invention provides an effect of improving manufacturability by simply connecting the first module and the second module in a manner in which, with the connector body of the connector member being press-fitted into the inside of the first 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 upper cap member.

[0127] In a water purifier with a composite filter according to an embodiment of the present invention, the third upward guide is formed to extend upward along the axial direction, making it easy to connect the connector member and the third upper cap member, improving workability. In particular, if the outer diameter of the third upward guide is formed to be the same as that of the central tube, the upward rib and the downward rib can be formed in mutually symmetrical shapes. Therefore, even if a worker flips the connector member over while connecting the first module and the second module using the connector member, a stable connection is possible, thereby providing an effect of improving manufacturability by preventing incorrect assembly.

[0128] 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 using a control unit, and can effectively prevent backflow of these fluids, thereby improving product reliability.

[0129] The water purifier having the composite filter according to another aspect of the present invention is capable of discharging domestic water as well as raw water inlet, first purified water outlet, second purified water inlet, and third purified water outlet. This allows for additional functions to be realized using an external filter in the process in which raw water passes through the composite filter. The composite filter is configured by integrating a spiral-wound internal filter member such as a reverse osmosis membrane filter or a hollow fiber membrane filter, thereby improving user convenience. The head member of the housing part is provided with first to fourth filter members so that independent flow paths are formed in which the raw water, purified water, and domestic water are not mixed. By providing the partition wall, the tubes through which the raw water, purified water, and domestic water flow are concentrated at the top of the composite filter, improving the freedom of layout design for other parts. In the filtration section, a first upper cap member and a second upper cap member are stacked, and a first through hole is formed in the first upper cap member so that the discharged domestic water flows through the domestic water flow path formed between the first upper cap member and the second upper cap member. This reduces the axial height of the composite filter, making it possible to make it more compact, and provides the effect of improving manufacturability through a simplified configuration.

[0130] In a water purifier with a composite filter according to another embodiment of the present invention, the first purified water that is discharged flows inside a first upward guide formed on a first upper cap member, and the discharged domestic water flows inside a second upward guide formed on a second upper cap member. The first and second upper cap members are spaced apart from each other by a certain distance to form a domestic water flow path. This makes it possible to form independent flow paths in which the first purified water and domestic water do not mix, and provides the effect of improving manufacturability through a simplified configuration.

[0131] In a water purifier with a composite filter according to another embodiment of the present invention, a spiral-wound type internal filter member is stably fixed via a first downward guide extending downward from a lower surface of a first upper cap member, thereby improving the durability of the water purifier, and the water for domestic use generated using the spiral-wound type internal filter member is configured to be discharged through a first through hole, thereby improving the operational stability of the water purifier.

[0132] According to another embodiment of the present invention, a water purifier with a composite filter is configured such that a third upper cap member and a fourth upper cap member are stacked and a post-treatment internal filter member is fixedly disposed at the lower part of the third upper cap member, and a second purified water entering from the outside flows through a second purified water flow path formed between the third upper cap member and the fourth upper cap member, thereby providing an effect of improving manufacturability through simplified configuration.

[0133] In a water purifier with a composite filter according to another embodiment of the present invention, the third purified water flows inside a third upward guide formed in the third upper cap member, and the second purified water flows inside a fourth upward guide formed in the fourth upper cap member. The third upper cap member and the fourth upper cap member are spaced apart from each other by a certain distance to form a second purified water flow path. This makes it possible to form independent flow paths in which the second purified water and the third purified water do not mix, thereby providing an effect of improving manufacturability through simplified configuration.

[0134] A water purifier with a composite filter according to another embodiment of the present invention provides an effect of improving durability of the water purifier by configuring the post-treatment internal filter member to be stably fixed via a third downward guide formed extending downward from the underside of the third upper cap member.

[0135] In a water purifier with a composite filter according to another embodiment of the present invention, a fourth downward guide formed extending downward from the lower surface of the fourth upper cap member extends downward to surround the outer circumferential surface of the third upper cap member and is extended to the outer circumferential surface of the second upper cap member, so that the post-treatment internal filter member is stably fixed, thereby providing an effect of improving the durability of the water purifier.

[0136] In a water purifier with a composite filter according to another embodiment of the present invention, the post-treatment internal filter member is stably fixed through a lower guide formed by extending upward from the upper surface of the lower cap member, thereby improving the durability of the water purifier. Furthermore, since the post-treatment internal filter member can be fixed using the third and fourth upper cap members and the lower cap member, the composite filter can be modularized through a subassembly process, thereby improving workability.

[0137] In a water purifier with a composite filter according to another embodiment of the present invention, a raw water flow path is formed between the body member and the spiral-wound internal filter member, and the spiral-wound internal filter member is spaced from the bottom of the body member so that the raw water flow path extends to the bottom of the spiral-wound internal filter member. Therefore, raw water moves to the bottom of the spiral-wound internal filter member and then passes through the spiral-wound internal filter member, thereby stably producing first purified water and domestic water in a separated state, providing an effect of improving the operational stability of the water purifier.

[0138] A water purifier with a composite filter according to another embodiment of the present invention has a central tube provided on an inner surface of a spirally wound type internal filter member, and the spirally wound type internal filter member is arranged in a spirally wound shape, while a first purified water flow path formed inside the spirally wound type internal filter member is stably maintained, thereby providing an effect of improving operational reliability through a smooth flow of the first purified water.

[0139] In a water purifier with a composite filter according to another embodiment of the present invention, first support protrusions are formed around the outer circumferential surface of the fourth upper cap member, protruding radially outward and supporting the inner surface of the body member, thereby securing a raw water flow path so that raw water entering from the top of the housing part moves to the filtration part. The first support protrusions are arranged at equal intervals, allowing raw water to move evenly around the fourth upper cap member, thereby improving the flow of raw water and providing the effect of improving product reliability.

[0140] A water purifier having 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 using a control unit, and can effectively prevent backflow of these fluids, thereby improving product reliability.

[0141] A water purifier having a composite filter according to still another aspect of the present invention is capable of not only raw water inlet, first purified water outlet, externally treated water inlet, and third purified water outlet, but also domestic water outlet, so that an additional function can be realized using an external treatment member in the process in which raw water passes through the composite filter. The composite filter is configured by integrating a spiral-wound internal filter member, so that user convenience is improved. The head member of the housing part is provided with first to fourth partition walls so that independent flow paths in which the raw water, first purified water, externally treated water, third purified water, and domestic water are not mixed are formed. As a result, the tubes through which the raw water, first purified water, externally treated water, third purified water, and domestic water flow are concentrated at the top of the composite filter, improving the freedom of layout design for other parts. In the filtration section, a pre-treatment internal filter member and a post-treatment internal filter member are stacked using a first upper cap member and a second upper cap member, and a spiral-wound type internal filter member is disposed radially inside these internal filter members, thereby enabling the composite filter to be manufactured using an already-manufactured spiral-wound type internal filter member, thereby providing the effect of improving manufacturability.

[0142] In yet another embodiment of the present invention, a water purifier with a composite filter has a connecting tube provided on a second lower cap member that fixes a post-treatment internal filter member and a spiral-wound internal filter member, and such connecting tube is formed to extend along the axial direction inside the pre-treatment internal filter member and the post-treatment internal filter member. This prevents the first purified water that has passed through the pre-treatment internal filter member and the third purified water that has passed through the post-treatment internal filter member from mixing with the incoming externally treated water, thereby providing an effect of improving the operational stability of the water purifier.

[0143] In a water purifier having a composite filter according to yet another embodiment of the present invention, a third upper cap member is disposed below the first upper cap member and spaced apart from the first upper cap member so as to form a first purified water flow path through which the first purified water flows, thereby providing an effect of improving the operational stability of the water purifier by stably discharging the first purified water.

[0144] In a water purifier with a composite filter according to yet another embodiment of the present invention, a first spacer extending downward from a lower surface of a first upper cap member supports an upper surface of a third upper cap member, thereby stably maintaining a distance between the first and third upper cap members, thereby providing an effect of improving the structural stability of the composite filter.

[0145] In a water purifier having a composite filter according to yet another embodiment of the present invention, the first upward guide and the third upward guide are arranged spaced apart from each other, thereby forming an extended first purified water flow path and smoothly discharging the first purified water, thereby improving the operational stability of the water purifier.

[0146] In yet another embodiment of the present invention, a water purifier with a composite filter has a first partition wall that is axially extended along a first upward guide, thereby effectively preventing the outflowing first purified water from mixing with the incoming raw water, and improving the quality of the final outflowing third purified water, thereby improving user satisfaction.

[0147] In yet another embodiment of the present invention, a water purifier with a composite filter has a second partition wall that is axially extended along a third upward guide, thereby effectively preventing the outflowing first purified water from mixing with the incoming externally treated water, thereby preventing deterioration in the quality of the externally treated water and improving the quality of the third purified water that is finally outflowing, thereby providing an effect of improving user satisfaction.

[0148] In yet another embodiment of the present invention, a water purifier with a composite filter has a third downward support guide extending downward from the third upper cap member, which is connected to a connecting tube, thereby effectively preventing the outflowing first purified water from being mixed with the incoming externally treated water, thereby preventing deterioration in the quality of the externally treated water and improving the quality of the third purified water that is finally outflowed, thereby improving user satisfaction.

[0149] In a water purifier having a composite filter according to yet another embodiment of the present invention, a fourth upper cap member is disposed below the third upper cap member and spaced apart from the third upper cap member so as to form an external treated water flow path through which the external treated water flows, thereby providing an effect of improving the operational stability of the water purifier by stably flowing the external treated water.

[0150] In a water purifier with a composite filter according to yet another embodiment of the present invention, a second spacer extending downward from a lower surface of the third upper cap member supports an upper surface of the fourth upper cap member, thereby stably maintaining a distance between the third and fourth upper cap members, thereby providing an effect of improving the structural stability of the composite filter.

[0151] In yet another embodiment of the present invention, a water purifier having a composite filter has a fourth upward guide disposed away from the third upward guide, thereby forming an external treated water flow path and allowing the incoming external treated water to flow smoothly, thereby providing an effect of improving the operational stability of the water purifier.

[0152] In yet another embodiment of the present invention, a water purifier with a composite filter is disposed such that the third partition wall body is axially extended along the fourth upward guide, thereby effectively preventing the incoming externally treated water from mixing with the outgoing domestic water, thereby preventing deterioration in the quality of the externally treated water and improving the quality of the third purified water that is finally discharged, thereby improving user satisfaction.

[0153] In a water purifier with a composite filter according to still another embodiment of the present invention, the spiral-wound inner filter element is supported by the fourth downward support guide, thereby providing an effect of improving the structural stability of the composite filter.

[0154] In a water purifier with a composite filter according to yet another embodiment of the present invention, the spiral-wound type inner filter member is supported in a spirally wound manner around the central tube, and the second purified water moves into the inside of the central tube through the second purified water through hole, thereby improving structural stability, and since the central tube is disposed to penetrate the second lower cap member, the second purified water flows stably to the bottom of the second lower cap member, thereby providing an effect of improving the operational stability of the water purifier.

[0155] In a water purifier with a composite filter according to yet another embodiment of the present invention, the second downward guide supports the lower surface of the housing part, so that the separation state between the second lower cap member and the lower surface of the housing part is stably maintained, and the second purified water that moves to the lower part of the second lower cap member moves smoothly through the third through hole formed in the second downward guide, thereby providing an effect of improving the operational stability of the water purifier.

[0156] In a water purifier with a composite filter according to yet another embodiment of the present invention, a pre-treatment internal filter member can be fixed by disposing a first upper cap member and a first lower cap member on the top and bottom of the pre-treatment internal filter member, respectively, which allows the composite filter to be modularized through a subassembly process and improves workability. A third spacer supported on an upper surface of the second upper cap member is extended downwardly from the bottom surface of the first lower cap member, so that the gap between them is stably maintained and the third purified water flows smoothly, thereby improving the operational stability of the water purifier.

[0157] In a water purifier with a composite filter according to yet another embodiment of the present invention, a fifth upper cap member is disposed on top of a first upper cap member and spaced apart from the first upper cap member so as to form a raw water flow path through which raw water flows, thereby providing an effect of improving the operational stability of the water purifier by stabilizing the flow of raw water.

[0158] In a water purifier having a composite filter according to yet another embodiment of the present invention, a raw water flow path is formed by arranging the fifth upward guide away from the first upward guide, and the input raw water flows smoothly, thereby improving the operational stability of the water purifier.

[0159] In yet another embodiment of the present invention, a water purifier with a composite filter is arranged such that the fourth partition wall body is axially extended along the fifth upward guide, thereby effectively preventing the incoming externally treated water from mixing with the outgoing domestic water, thereby preventing a decrease in the quality of the externally treated water and improving the quality of the third purified water that is finally discharged, thereby improving user satisfaction.

[0160] In a water purifier with a composite filter according to yet another embodiment of the present invention, the fifth downward support guide is extended from the first upper cap member to the first lower cap member, so that the incoming raw water and the outgoing third purified water do not mix, thereby providing an effect of improving the operational stability of the water purifier.

[0161] A water purifier equipped with a composite filter according to yet another embodiment of the present invention can control the valve unit using a control unit to control the flow of raw water, first purified water, externally treated water, third purified water, and domestic water, and effectively prevents these fluids from flowing back, thereby providing an effect of improving product reliability. [Brief description of the drawings]

[0162] [Figure 1] 1 is a schematic diagram showing a water purifier including a composite filter according to an embodiment of the present invention; [Diagram 2]1 is a plan view showing a head member of a water purifier including a composite filter according to an embodiment of the present invention; [Diagram 3] 1 is a cross-sectional view showing 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. [Diagram 5] 2 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] 4 is a cross-sectional view illustrating a state in which a filtering unit of a water purifier including a composite filter according to an embodiment of the present invention is installed in a housing unit. [Figure 8] 1 is a diagram showing an overall water piping diagram of a water purifier having a composite filter according to an embodiment of the present invention; [Figure 9] FIG. 13 is a diagram showing an overall water piping diagram of a water purifier having a composite filter according to another embodiment of the present invention. [Figure 10] FIG. 11 is a schematic diagram showing an overall water piping diagram of a water purifier having a composite filter according to still another embodiment of the present invention. [Figure 11] FIG. 11 is a schematic diagram showing a water purifier including a composite filter according to another embodiment of the present invention. [Figure 12] FIG. 13 is a plan view showing a head member of a water purifier having a composite filter according to another embodiment of the present invention. [Figure 13] FIG. 4 is a cross-sectional view showing a filtering unit of a water purifier including a composite filter according to another embodiment of the present invention. [Figure 14] FIG. 14 is an enlarged cross-sectional view showing a portion A in FIG. [Figure 15] FIG. 14 is an enlarged cross-sectional view showing a portion B in FIG. [Figure 16]5 is a cross-sectional view showing a state in which first to fourth upper cap members and a lower cap member of a water purifier including a composite filter according to another embodiment of the present invention are disassembled. FIG. [Figure 17] FIG. 17 is a cross-sectional view of part II in FIG. [Figure 18] FIG. 17 is a cross-sectional view of the II-II portion of FIG. [Figure 19] 11 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 20] FIG. 11 is a block diagram showing a water purifier including a composite filter according to still another embodiment of the present invention. [Figure 21] 13 is a plan view showing a head member of a water purifier including a composite filter according to still another embodiment of the present invention. FIG. [Figure 22] 11 is a cross-sectional view showing an assembled state of a filtering unit of a water purifier including a composite filter according to still another embodiment of the present invention. [Figure 23] 11 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 still another embodiment of the present invention are disassembled. FIG. [Figure 24] 11 is a cross-sectional view illustrating a state in which a filtering unit of a water purifier having a composite filter according to still another embodiment of the present invention is installed in a housing unit. [Diagram 25] FIG. 24 is a cross-sectional view of part II in FIG. 23. [Figure 26] 24 is a cross-sectional view of the II-II portion of FIG. 23. [Figure 27] FIG. 24 is a cross-sectional view taken along line III-III of FIG. 23. [Figure 28] FIG. 11 is a schematic diagram showing an overall water piping diagram of a water purifier having a composite filter according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0163] 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 as meanings and concepts that correspond to the technical ideas of the present invention according to the principle that the inventor can define the terms and concepts in order to best describe his / her invention.

[0164] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to a preferred embodiment of the present invention and do not fully represent the technical ideas of the present invention, and therefore, there may be equivalents and modifications that replace the configurations at the time of filing the application of the present invention.

[0165] As used herein, terms such as "comprise" or "have" are intended to describe the presence of features, numbers, steps, operations, components, parts, or combinations thereof set forth in the specification, and should be understood as not precluding the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0166] When a component is "in front of," "in back of," "above," or "below" another component, it does not only mean that the component is immediately adjacent to the other component and is disposed "in front of," "in back of," "above," or "below," unless there are special circumstances, but also means that another component is disposed between them. Furthermore, when a component is "connected" to another component, it does not only mean that the component is directly connected to the other component, but also means that the component is indirectly connected to the other component, unless there are special circumstances.

[0167] Hereinafter, a water purifier having a composite filter according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a water purifier having a composite filter according to an embodiment of the present invention, FIG. 2 is a plan view showing a head member of the water purifier having a composite filter according to an embodiment of the present invention, FIG. 3 is a cross-sectional view showing a state in which a first module and a second module of the water purifier having a composite filter according to an embodiment of the present invention are disassembled, FIG. 4 is a cross-sectional view showing a state in which the first module and the second module of the water purifier having a composite filter according to an embodiment of the present invention are assembled, FIG. 5 is a cross-sectional view showing a state in which an upper cap member and a lower cap member of the water purifier having a composite filter according to an embodiment of the present invention are disassembled, FIG. 6 is a cross-sectional view of part II of FIG. 5, and FIG. 7 is a cross-sectional view showing a state in which a filtration unit of the water purifier having a composite filter according to an embodiment of the present invention is installed in a housing unit. Here, a means an axial direction of the composite filter, and r means a radial direction of the composite filter. In order to clearly explain the present invention, parts that are not related to the explanation are omitted from the drawings.

[0168] As shown in Figs. 1 to 4, the water purifier having the composite filter according to the present invention includes a housing unit 1100 having a raw water inlet port 1010 through which raw water W1 is input, a second purified water outlet port 1020 through which filtered second purified water C2 is output, an external treated water inlet port 1030 through which external treated water C2' generated by externally treating the second purified water C2 is input, a third purified water outlet port 1040 through which filtered third purified water C3 is output, and a domestic water outlet port 1050 through which domestic water W2 generated during the filtration process is output. The filtration unit 1200 may include a pre-treatment internal filter member 1060 arranged inside the housing unit 1100, a spiral wound type internal filter member 1070 arranged inside the housing unit 1100 to filter the first purified water C1 to produce a second purified water C2, an external treatment member 1080 arranged outside the housing unit 1100 to process the second purified water C2 to produce external treated water C2', and a post-treatment internal filter member 1090 arranged inside the housing unit 1100 to filter the incoming external treated water C2' to produce a third purified water C3. That is, the raw water W1 input through the raw water inlet port 1010 passes through the pre-treatment internal filter member 1060 and the spiral wound type internal filter member 1070 provided in the filtration unit 1200 in sequence, and then is output through the second purified water outlet port 1020. After passing through the external treatment member 1080, the water is further input through the external treated water inlet port 1030, and then filtered through the post-treatment internal filter member 1090. The finally filtered third purified water C3 can be output through the third purified water outlet port 1040 and then provided to the user. Alternatively, the water can be stored in a separate purified water storage unit, or can be supplied to the cold water generating unit, the hot water generating unit, and the ice generating unit for generating cold water, hot water, and ice. In this case, the housing unit 1100 may be provided with a raw water flow path PW1 and an external treated water flow path PC2' through which the raw water W1 input from the top and the external treated water C2' flow.In addition, the first purified water C1 moves to the lower side of the spiral wound type internal filter member 1070 and then moves to the inside of the spiral wound type internal filter member 1070, and domestic water W2 generated while the first purified water C1 is filtered by the spiral wound type internal filter member 1070 is discharged to the outside of the housing unit 1100 through the domestic water discharge port 1050 and then discharged to the outside of the water purifier through a separate tube. Since it is possible to discharge domestic water W2 as well as raw water W1 inlet, second purified water C2 outlet, externally treated water C2' inlet, and third purified water C3 outlet, it is possible to realize an additional function using the external treatment member 1080 while raw water W1 passes through the composite filter, and by integrating three internal filter members including the spiral wound type internal filter member 1070 to form a composite filter, the water purifier can be made smaller and easier to replace, improving user convenience. In this case, the pre-treatment internal filter member 1060 may be a pre-carbon filter or a microfiltration (MF) filter, and the post-treatment internal filter member 1090 may be a post-carbon filter or a microfiltration (MF) filter. Alternatively, the pre-treatment internal filter member 1060 and the post-treatment internal filter member 1090 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 internal filter member 1060. For example, such a filter member may be an NT filter member. Such an NT filter member may be made of a material, for example, a nano-trap material, that is charged with static electricity so as to adsorb foreign matter contained in the inflowing raw water W1. Such a material may be configured to be charged with a positive charge. This allows negatively charged foreign matter contained in the raw water W1, such as viruses, bacteria, and fine particles, to be adsorbed to the NT filter member by static electricity. Such a filter member may be a sediment filter member.The spiral wound internal filter member 1070 may be a reverse osmosis membrane filter or a hollow fiber membrane filter. In this case, the external treatment member 1080 may be a separate functional filter (deionization filter for removing heavy metals) or a pump for increasing the pressure of the second purified water C2. Meanwhile, the external treatment member 1080 is not limited to a member that physically / chemically treats the second purified water C2 using another filter or the like, and may include a temporary tank for temporarily storing the second purified water C2.

[0169] As shown in FIG. 2, the housing unit 1100 includes a head member 1110 having a first partition wall 1111 for preventing the raw water W1 and the externally treated water C2' from mixing, a second partition wall 1112 for preventing the raw water W1 and the domestic water W2 from mixing, a third partition wall 1113 for preventing the second purified water C2 and the domestic water W2 from mixing, and a fourth partition wall 1114 for preventing the second purified water C2 and the third purified water C3 from mixing, and a body member 1120 extending from the head member 1110 and having a filtration unit 1200 disposed therein. Such a filtration section 1200 includes a first module 1200A in which a pre-treatment internal filter member 1060 and a spirally wound type internal filter member 1070 are sequentially arranged, and a second module 1200B stacked at the bottom of the first module 1200A and equipped with a post-treatment internal filter member 1090, and the second module 1200B may include a discharge tube member 1210 disposed through the center of the first module 1200A so that the third purified water C3 can be discharged to the outside. That is, each filter is modularized using a first module 1200A having a pre-treatment internal filter member 1060 and a spiral wound type internal filter member 1070, and a second module 1200B having a post-treatment internal filter member 1090, and the first module 1200A and the second module 1200B are stacked to form a composite filter, thereby improving manufacturability, and a discharge tube member 1210 having a third purified water flow path PC3 is disposed through the center of the first module 1200A so that the third purified water C3 generated from the second module 1200B disposed at the bottom can be discharged to the outside, thereby preventing the third purified water C3 from mixing with the second purified water C2, and ensuring the operational stability of the water purifier. In addition to the incoming raw water W1, the outgoing second purified water C2, the incoming externally treated water C2', 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 is formed with a raw water area RW1 where the raw water W1 enters, a second purified water area RC2 where the second purified water C2 exits, an externally treated water area RC2' where the externally treated water C2' enters, a third purified water area RC3 where the third purified water C3 exits, and a domestic water area RW2 where the domestic water W2 is discharged.To this end, the head member 1110 of the housing section 1100 is provided with the above-mentioned first to fourth partition walls 1111, 1112, 1113, 1114 so as to form independent flow paths in which the raw water W1, the second purified water C2, the externally treated water C2', the third purified water C3 and the domestic water W2 do not mix, so that the tubes through which the raw water W1, the second purified water C2, the externally treated water C2', the third purified water C3 and the domestic water W2 flow are concentrated at the top of the composite filter, thereby improving the freedom of layout design of other parts.

[0170] As shown in Figures 3 and 4, in a water purifier equipped with a composite filter according to one embodiment of the present invention, a first module 1200A supports a spirally wound internal filter member 1070 to be wound in a spiral shape, and includes a central tube 1071 having a second purified water through hole 1071a formed therein so that the second purified water C2 flows therein, and a discharge tube member 1210 is disposed to penetrate the center of the central tube 1071 and is disposed at 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 1071 and the discharge tube member 1210. A spirally wound internal filter member 1070 is wound in a spiral shape in the central tube 1071, and a second purified water through hole 1071a is formed so that the second purified water C2 flows into a second purified water flow path PC2 provided therein. The discharge tube member 1210 inserted through the center of the central tube 1071 is positioned a certain distance away from the central tube 1071, so that the second purified water flow path PC2 is stably maintained and operational reliability can be ensured through the smooth flow of the second purified water C2. The central tube 1071 supports the inner surface of the spiral wound type internal filter member 1070 for structural stability of the spiral wound type internal filter member 1070, and when the spiral wound type internal filter member 1070 is configured to be wound around the central tube 1071 as described above, it may be formed integrally with the spiral wound type internal filter member 1070, but is not limited thereto, and the spiral wound type internal filter member 1070 may be configured to be wound around the central tube 1071 while being formed integrally with an upward rib 1282 of a connector member 1280 described below. In this case, a separate O-ring may be provided between the central tube 1071 and the upward rib 1282 of the connector member 1280, thereby preventing the second purified water C2 from flowing into the third purified water flow path PC3.

[0171] Meanwhile, as shown in Fig. 4 and Fig. 7, in the water purifier with the composite filter according to an embodiment of the present invention, the fourth partition wall 1114 may be disposed to extend in the axial direction a along the discharge tube member 1210. In this case, the fourth partition wall 1114 may be disposed to extend in the axial direction a along the discharge tube member 1210, and when the head member 1110 and the body member 1120 are connected to each other, the fourth partition wall 1114 may be connected in a manner that covers the outer surface of the discharge tube member 1210, the fourth partition wall 1114 may be connected in a manner that is fitted to the inner surface of the discharge tube member 1210, or the fourth partition wall 1114 may be connected in a manner that is held at the upper end of the discharge tube member 1210. As such, the fourth partition wall 1114 is disposed to extend in the axial direction a along the discharge tube member 1210, thereby effectively preventing the discharged third purified water C3 from being mixed with the discharged second purified water C2, and improving the operational stability of the water purifier.

[0172] 4 and 7, in the water purifier with the composite filter according to an embodiment of the present invention, the third partition wall 1113 may be disposed to extend in the axial direction a along the central tube 1071. In this case, the third partition wall 1113 may be disposed to extend in the axial direction a along the central tube 1071, and when the head member 1110 and the body member 1120 are coupled to each other, the third partition wall 1113 may be coupled to cover the outer surface of the central tube 1071, the third partition wall 1113 may be coupled to the inner surface of the central tube 1071, or the third partition wall 1113 may be coupled to the upper end of the central tube 1071. As described above, the third partition wall 1113 is disposed to extend in the axial direction a along the central tube 1071, thereby effectively preventing the second purified water C2 from being mixed with the domestic water W2 being discharged, and improving the operational stability of the water purifier.

[0173] 3 and 4, in the water purifier with the composite filter according to an embodiment of the present invention, the first module 1200A includes a first upper cap member 1220 in which a pre-treatment internal filter member 1060 is disposed on the outer side in the radial direction r and a spiral-wound type internal filter member 1070 is disposed on the inner side in the radial direction r, and the first upper cap member 1220 may include a first upward guide 1221 disposed at a certain distance from the central tube 1071 so as to form a domestic water flow path PW2 through which the discharged domestic water W2 flows. The first upward guide 1221 extends upward along the axial direction a in parallel with the central tube 1071 to guide the discharged domestic water W2. That is, the discharged domestic water W2 is discharged to the outside through the domestic water flow path PW2 formed between the first upward guide 1221 provided in the first upper cap member 1220 and the central tube 1071, so that the domestic water W2 is not mixed with the incoming raw water W1 or the outgoing second purified water C2, improving the operational stability of the water purifier. The first upper cap member 1220 may be formed with a first downward support guide 1222, which may include a 1-1 downward support guide 1222a disposed radially outward to fix the pre-treatment internal filter member 1060, and a 1-2 downward support guide 1222b disposed radially inward to fix the spiral wound type internal filter member 1070. The first-second downward support guide 1222b stably supports the spiral wound type internal filter member 1070, and the spiral wound type internal filter member 1070 may be provided with a separate packing supported by the first-second downward support guide 1222b. When the first downward support guide 1222 is formed in this manner, the pre-treatment internal filter member 1060 and the spiral wound type internal filter member 1070 are stably fixed, improving the durability of the water purifier.

[0174] 4 and 7, in the water purifier with the composite filter according to an embodiment of the present invention, the second partition wall 1112 may be disposed to extend in the axial direction a along the first upward guide 1221. In this case, the second partition wall 1112 may be disposed to extend in the axial direction a along the first upward guide 1221, and 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 first upward guide 1221, the second partition wall 1112 may be coupled to be fitted into the inner surface of the first upward guide 1221, or the second partition wall 1112 may be coupled to be held at the upper end of the first upward guide 1221. In other words, the second partition wall 1112 is extended in the axial direction a along the first upward guide 1221, thereby effectively preventing the incoming raw water W1 from mixing with the outgoing domestic water W2, thereby improving the operational stability of the water purifier.

[0175] As shown in FIG. 3 and FIG. 4, in the water purifier with the composite filter according to an embodiment of the present invention, the first module 1200A may further include a first lower cap member 1230 to which the pre-treatment internal filter member 1060 is fixed. The pre-treatment internal filter member 1060 may be fixed by disposing the first upper cap member 1220 and the first lower cap member 1230 on the upper and lower parts of the pre-treatment internal filter member 1060, respectively, thereby enabling modularization of the first module 1200A through a subassembly process, thereby improving workability. The first lower cap member 1230 may be formed with a first upward support guide 1231, and the first upward support guide 1231 may include a 1-1 upward support guide 1231a disposed radially outwardly to fix the outer surface and inner surface of the pre-treatment internal filter member 1060, and a 1-2 upward support guide 1231b disposed radially inwardly to fix the outer surface and inner surface of the pre-treatment internal filter member 1060. When the first upward support guide 1231 is formed in this manner, the pre-treatment internal filter member 1060 is stably fixed, improving the durability of the water purifier. Also, the first lower cap member 1230 may be provided with a first downward guide 1232, which extends downward along the axial direction a to support the upper surface of the second module 1200B, improving the structural stability of the composite filter.

[0176] 3 and 4, in the water purifier with the composite filter according to an embodiment of the present invention, the first module 1200A may further include an inner guide 1240 that supports the inner surface of the pretreatment inner filter member 1060 and has a first purified water through hole 1240a formed therein so that the first purified water C1 flows inside. That is, since the inner guide 1240 supports the inner surface of the pretreatment inner filter member 1060, structural stability is improved, and the first purified water C1 flows smoothly inside through the first purified water through hole 1240a formed in the inner guide 1240, so that the operational stability of the water purifier is improved.

[0177] In this case, as shown in Fig. 3 and Fig. 4, in the water purifier with the composite filter according to an embodiment of the present invention, the inner guide 1240 may be arranged to connect the first upper cap member 1220 and the first lower cap member 1230, and when the inner guide 1240 is arranged to connect the first upper cap member 1220 and the first lower cap member 1230 in this manner, the structural stability of the first module 1200A is improved. The inner guide 1240 may be manufactured separately from the pre-treatment internal filter member 1060 and configured to support the inner surface of the pre-treatment internal filter member 1060 during the assembly process of the first module 1200A, but is not limited thereto, and the inner guide 1240 may be formed integrally with the pre-treatment internal filter member 1060, or may be configured so that the pre-treatment internal filter member 1060 is disposed radially outwardly of the first upper cap member 1220 and the first lower cap member 1230 when the inner guide 1240 is formed integrally with the first upper cap member 1220 and the first lower cap member 1230.

[0178] 3 and 4, in the water purifier having the composite filter according to an embodiment of the present invention, the inner guide 1240 may be disposed apart from the outer surface of the spiral wound type inner filter member 1070 so that the first purified water flow path PC1 through which the first purified water C1 flows is extended to the bottom of the spiral wound type inner filter member 1070. That is, since the inner guide 1240 is disposed apart from the outer surface of the spiral wound type inner filter member 1070, the first purified water flow path PC1 through which the first purified water C1 flows is stably formed therebetween, and since the first purified water flow path PC1 is extended to the bottom of the spiral wound type inner filter member 1070, the first purified water C1 that has moved to the inside through the first purified water through hole 1240a formed in the inner guide 1240 stably moves to the bottom of the spiral wound type inner filter member 1070, thereby improving the operational stability of the water purifier.

[0179] Meanwhile, as shown in Figures 3 and 4, in a water purifier with a composite filter according to one embodiment of the present invention, the first module 1200A further includes a second upper cap member 1250 that is stacked on top of the first upper cap member 1220 and spaced apart from the first upper cap member 1220 so that a raw water flow path PW1 is formed, and the second upper cap member 1250 may include a second downward support guide 1252 that is extended to the first lower cap member 1230. That is, the second upper cap member 1250 is disposed at a distance from the upper portion of the first upper cap member 1220, so that the raw water flow path PW1 is stably formed and the smooth flow of the incoming raw water W1 can be ensured, and the second downward support guide 1252 is extended to the first lower cap member 1230, so that the raw water W1 entering the inside of the first module 1200A can be prevented from flowing out to the outside of the first module 1200A and being mixed with the incoming externally treated water C2', thereby preventing deterioration of the water quality of the externally treated water C2' and the third purified water C3 and improving user satisfaction. Meanwhile, the second upper cap member 1250 can be disposed at a distance from the inner surface of the housing part 1100 so that the externally treated water flow path PC2' is formed.

[0180] 3 and 4, in the water purifier with the composite filter according to an embodiment of the present invention, the first upper cap member 1220 includes at least two or more first support protrusions 1220a protruding outward in the radial direction r around the outer circumferential surface, and the first support protrusions 1220a may be arranged at equal intervals. That is, the first support protrusions 1220a protruding outward in the radial direction r around the outer circumferential surface of the first upper cap member 1220 are provided, and the first upper cap member 1220 supports the inner surface of the second upper cap member 1250, so that the raw water W1 entering the water can flow around the first upper cap member 1220 to secure a raw water flow path PW1, and the first support protrusions 1220a are arranged at equal intervals, so that the raw water W1 can move evenly in the circumferential direction of the first upper cap member 1220, thereby improving the flow of the raw water W1 and improving product reliability. Meanwhile, an O-ring OR may be provided around the outer circumferential surface of the first lower cap member 1230 to prevent the incoming raw water W1 from flowing out.

[0181] 3 and 4, in the water purifier with the composite filter according to an embodiment of the present invention, the second upper cap member 1250 may include a second upward guide 1251 disposed at a certain distance from the first upward guide 1221 so as to form a raw water flow path PW1 through which the incoming raw water W1 flows. That is, the incoming raw water W1 flows through the raw water flow path PW1 formed between the second upward guide 1251 provided in the second upper cap member 1250 and the first upward guide 1221 provided in the first upper cap member 1220, so that the incoming raw water W1 does not mix with the incoming externally treated water C2' or the outgoing domestic water W2, improving the operational stability of the water purifier.

[0182] 4 and 7, in the water purifier with the composite filter according to an embodiment of the present invention, the first partition wall 1111 may be disposed to extend in the axial direction a along the second upward guide 1251. In this case, the first partition wall 1111 may be disposed to extend in the axial direction a along the second upward guide 1251, and when the head member 1110 and the body member 1120 are coupled to each other, the first partition wall 1111 may be coupled to cover the outer surface of the second upward guide 1251, the first partition wall 1111 may be coupled to the inner surface of the second upward guide 1251, or the first partition wall 1111 may be coupled to the upper end of the second upward guide 1251. In other words, by extending the first partition wall 1111 in the axial direction a along the second upward guide 1251, the incoming raw water W1 is prevented from mixing with the incoming externally treated water C2', thereby improving the operational stability of the water purifier.

[0183] Meanwhile, as shown in Figures 3 and 4, in the water purifier with the composite filter according to an embodiment of the present invention, the second module 1200B includes a third upper cap member 1260 and a third lower cap member 1270 to which the post-treatment internal filter member 1090 is fixed, and the discharge tube member 1210 may be disposed to extend upward from the third lower cap member 1270 and penetrate the third upper cap member 1260. The discharge tube member 1210 may be formed with a third purified water through hole 1210a so that the third purified water C3 that has passed through the post-treatment internal filter member 1090 moves to the inside. That is, the second module 1200B can be sub-assembled through the third upper cap member 1260 and the third lower cap member 1270, improving workability, and the discharge tube member 1210 extends upward from the third lower cap member 1270 and is disposed to pass through the third upper cap member 1260, so that the third purified water flow path PC3 is stably formed in the process of stacking the first module 1200A and the second module 1200B, improving manufacturability. In this case, the third upper cap member 1260 may be formed with a third downward support guide 1262 extending downward along the axial direction a. The third downward support guide 1262 may include a 3-1 downward support guide 1262a that fixes the outer side of the post-treatment internal filter member 1090 in the radial direction r, and a 3-2 downward support guide 1262b that fixes the inner side of the post-treatment internal filter member 1090 in the radial direction r. In addition, the third lower cap member 1270 may be formed with a third upward support guide 1271 extending upward along the axial direction a. The third upward support guide 1271 may include a 3-1 upward support guide 1271a for fixing an outer side in the radial direction r of the post-treatment internal filter member 1090, and a 3-2 upward support guide 1271b for fixing an inner side in the radial direction r of the post-treatment internal filter member 1090. That is, the post-treatment internal filter member 1090 is stably fixed via the third upward support guide 1271 and the third downward support guide 1262, thereby improving the durability of the water purifier.

[0184] Also, as shown in Figures 3 and 4, in a water purifier with a composite filter according to one embodiment of the present invention, a connector member 1280 is provided to interconnect the first module 1200A and the second module 1200B, and the connector member 1280 may include a connector body 1281 press-fitted and fixed inside the first lower cap member 1230, an upward rib 1282 extending upward from the connector body 1281 to connect with the central tube 1071, and a downward rib 1283 extending downward from the connector body 1281 to connect with the third upper cap member 1260. That is, basically, in a state where the connector body 1281 of the connector member 1280 is press-fitted and fixed inside the first lower cap member 1230, an upward rib 1282 extending upward from the connector body 1281 is coupled to the central tube 1071, and a downward rib 1283 extending downward from the connector body 1281 is coupled to the third upper cap member 1260, thereby easily coupling the first module 1200A and the second module 1200B, thereby improving manufacturability. In this case, an O-ring OR for preventing leakage of the first purified water C1 and the third purified water C3 may be provided on an outer peripheral surface of the connector body 1281 of the connector member 1280, an inner peripheral surface of the upward rib 1282, and an inner peripheral surface of the downward rib 1283.

[0185] In this regard, as shown in Figures 3 and 4, in a water purifier with a composite filter according to one embodiment of the present invention, the third upper cap member 1260 includes a third upward guide 1261 extending upward along the axial direction a to connect with the inner surface of the downward rib 1283, and the third upward guide 1261 may be configured to have the same outer diameter as the central tube 1071. That is, since the third upward guide 1261 is formed to extend upward along the axial direction a, it becomes easy to connect the connector member 1280 and the third upper cap member 1260, improving workability. In particular, if the outer diameter of the third upward guide 1261 is formed to be the same as that of the central tube 1071, the upward rib 1282 and the downward rib 1283 can be formed in mutually symmetrical shapes. Therefore, even if a worker flips the connector member 1280 over while connecting the first module 1200A and the second module 1200B using the connector member 1280, a stable connection is possible, thereby improving manufacturability by preventing incorrect assembly.

[0186] FIG. 8 is a diagram showing the overall water piping of a water purifier having a composite filter according to an embodiment of the present invention.

[0187] As shown in Fig. 8, the water purifier with the composite filter according to an embodiment of the present invention may further include a valve unit 1300 for controlling the flow of raw water W1, second purified water C2, externally treated water C2', third purified water C3, and domestic water W2, and a control unit 1400 for controlling the operation of the valve unit 1300. The valve unit 1300 may include a first valve 1310 for controlling the flow of raw water W1, a second valve 1320 for controlling the flow of second purified water C2, a third valve 1330 for controlling the flow of externally treated water C2', a fourth valve 1340 for controlling the flow of third purified water C3, and a fifth valve 1350 for controlling the flow of domestic water W2. At this time, the raw water W1 entering the water is moved to a state where the pressure is reduced through the pressure reducing valve 1011. In other words, by controlling such valve section 1300 via the control section 1400, the flow of raw water W1, second purified water C2, externally treated water C2', third purified water C3 and domestic water W2 can be controlled, and by effectively preventing these fluids from flowing back, product reliability can be ensured.

[0188] As described above, the water purifier having the composite filter according to the present invention is capable of not only inputting raw water W1, outputting second purified water C2, inputting externally treated water C2', and outputting third purified water C3, but also discharging domestic water W2. Therefore, an additional function can be realized by using the external treatment member 1080 while the raw water W1 passes through the composite filter. By integrating three internal filter members including the spiral wound type internal filter member 1070 to form a composite filter, the water purifier can be made compact and easily replaced, improving user convenience. In addition, the filters are modularized using the first module 1200A having the pre-treatment internal filter member 1060 and the spiral wound type internal filter member 1070, and the second module 1200B having the post-treatment internal filter member 1090, and the first module 1200A and the second module 1200B are modularized. Since the composite filter is constructed in a stacked arrangement, manufacturability is improved, and since the discharge tube member 1210 is arranged to penetrate the center of the first module 1200A so that the third purified water C3 generated from the second module 1200B arranged at the bottom can be discharged to the outside, the third purified water C3 does not mix with the second purified water C2, and the operational stability of the water purifier can be ensured. In addition, the head member 1110 of the housing part 1100 is provided with first to fourth partition walls 1111, 1112, 1113, and 1114 so that independent flow paths are formed in which the raw water W1, the second purified water C2, the externally treated water C2', the third purified water C3, and the domestic water W2 do not mix, and the tubes through which the raw water W1, the second purified water C2, the externally treated water C2', the third purified water C3, and the domestic water W2 flow are concentrated at the top of the composite filter, thereby improving the freedom of layout design of other parts.

[0189] FIG. 9 is a schematic diagram showing the overall water piping diagram of a water purifier having a composite filter according to another embodiment of the present invention, FIG. 10 is a schematic diagram showing the overall water piping diagram of a water purifier having a composite filter according to yet another embodiment of the present invention, FIG. 11 is a schematic diagram showing a water purifier having a composite filter according to another embodiment of the present invention, FIG. 12 is a plan view showing a head member of a water purifier having a composite filter according to another embodiment of the present invention, FIG. 13 is a cross-sectional view showing the filtration section of a water purifier having a composite filter according to another embodiment of the present invention, FIG. 14 is an enlarged cross-sectional view showing part A of FIG. 13, and FIG. 15 is an enlarged cross-sectional view showing part B of FIG. 13.

[0190] As shown in FIG. 9, in the water purifier with the composite filter according to another embodiment of the present invention, the raw water W1 flows through a pressure reducing valve 2011 and is reduced in pressure. At this time, the raw water W1 may be filtered through a separate pre-treatment filter 2090 such as a sediment filter or a carbon filter. The raw water W1 flows into a spiral wound type internal filter member 2060. At this time, the spiral wound type internal filter member 2060 may be a spiral wound type reverse osmosis membrane filter. The first purified water C1 filtered through the spiral wound type internal filter member 2060 may be reverse osmosis membrane treated water, and the first purified water C1 flows to the external filter 70 after being discharged to the outside. The external filter 70 may be a mineral filter. That is, the first purified water C1 such as reverse osmosis membrane treated water has all ions removed, but the second purified water C2 may contain sufficient minerals by passing through a functional filter such as a mineral filter. That is, even if ions are removed by the reverse osmosis membrane filter while the raw water W1 passes through the composite filter, an additional function of adding minerals can be realized by using an external filter 70 such as a mineral filter. The second purified water C2 moves to the post-treatment internal filter member 2080. The post-treatment internal filter member 2080 may be a carbon filter. In this case, the external filter 70 may be replaced with a separate purified water tank. That is, the first purified water C1 discharged to the outside is stored in the purified water tank, and in the process of providing drinking water to the user, the first purified water C1 stored in the purified water tank is discharged after passing through the post-treatment internal filter member 2080 such as a carbon filter, thereby improving the water quality and improving user satisfaction. In this case, it is also possible to provide both the external filter 70 and the purified water tank. In addition, the domestic water W2 generated in the process of passing the raw water W1 through the spiral wound type internal filter member 2060 is discharged to the outside.The valve section 2300 described later may be provided with a first valve 2310 for adjusting the flow of raw water W1, a second valve 2320 for adjusting the flow of first purified water C1, a third valve 2330 for adjusting the flow of second purified water C2, a fourth valve 2340 for adjusting the flow of third purified water C3, and a fifth valve 2350 for adjusting the flow of domestic water W2.

[0191] Alternatively, as shown in FIG. 10, in a water purifier having a composite filter according to another embodiment of the present invention, the raw water W1 entering the water passes through a pressure reducing valve 2011 and is reduced in pressure, and the raw water W1 thus passed passes to a spiral wound type internal filter element 2060. In this case, the spiral wound type internal filter element 2060 may be a spiral wound type hollow fiber membrane filter that can function as a pre-treatment filter. The first purified water C1 filtered through the spiral wound type internal filter element 2060 may be UF treated water, and the first purified water C1 is discharged to the outside and then passes to an external filter 70. The external filter 70 may be a reverse osmosis membrane filter that can function as a main filter. That is, the first purified water C1 such as UF treated water passes through a main filter such as a reverse osmosis membrane filter, so that the user can safely drink the second purified water C2. That is, the raw water W1 is pretreated by the hollow fiber membrane filter while passing through the composite filter, and then passes through the external filter 70 such as a reverse osmosis membrane filter, thereby realizing an additional function that allows the user to drink safely. The second purified water C2 moves to the post-treatment internal filter member 2080. The post-treatment internal filter member 2080 may be a carbon filter. The second purified water C2 is configured to be discharged after passing through the post-treatment internal filter member 2080 such as a carbon filter, thereby improving the water quality and improving user satisfaction. In addition, the domestic water W2 generated while the raw water W1 passes through the spiral wound type internal filter member 2060 may be UF domestic water, and this UF domestic water may be used as sterilized water for sterilizing the external filter 70 such as a reverse osmosis membrane filter and the water piping connected thereto after passing through a separate sterilization module 2051 disposed outside. The sterilization module 2051 may be a UV sterilization filter or a separate sterilization means. In this case, it is also possible to configure the UF domestic water to simply be discharged to the outside.The valve section 2300 described later may be provided with a first valve 2310 for adjusting the flow of raw water W1, a second valve 2320 for adjusting the flow of first purified water C1, a third valve 2330 for adjusting the flow of second purified water C2, a fourth valve 2340 for adjusting the flow of third purified water C3, and a fifth valve 2350 for adjusting the flow of domestic water W2.

[0192] 11 to 15, the water purifier with the composite filter according to the embodiment of the present invention includes a housing unit 2100 having a raw water inlet port 2010 for receiving raw water W1, a first purified water outlet port 2020 for discharging a first purified water C1 filtered therethrough, a second purified water inlet port 2030 for receiving a second purified water C2 filtered externally, a third purified water outlet port 2040 for discharging a third purified water C3 filtered therethrough, and a domestic water outlet port 2050 for discharging domestic water generated during the filtration process. The filtration section 2200 may include a spiral-wound internal filter member 2060 arranged inside the housing section 2100 to filter W1 to produce a first purified water C1, an external filter member 2070 arranged outside the housing section 2100 to filter the first purified water C1 to produce a second purified water C2, and a post-treatment internal filter member 2080 arranged inside the housing section 2100 to filter the second purified water C2 to produce a third purified water C3.

[0193] In this manner, the raw water W1 input through the raw water inlet port 2010 is filtered through the spiral wound type internal filter member 2060, the external filter member 2070, and the post-treatment internal filter member 2080 provided in the filtering unit 2200 in sequence, and the finally filtered third purified water C3 is discharged through the third purified water outlet port 2040 and then provided to the user. Alternatively, it may be stored in a separate purified water storage unit, or may be supplied to the cold water generating unit, the hot water generating unit, and the ice generating unit for generating cold water, hot water, and ice. In addition, the domestic water W2 generated in the spiral wound type internal filter member 2060 may be discharged to the outside of the housing unit 2100 through the domestic water discharge port 2050, and then discharged to the outside of the water purifier through a separate tube. In this way, by configuring the filter so that raw water W1 can be input, first purified water C1 can be output, second purified water C2 can be input, and third purified water C3 can be output, as well as domestic water W2 can be output. In the process in which raw water W1 passes through the composite filter, additional functions can be realized using the external filter member 2070, and a composite filter can be configured by integrating a spiral-wound internal filter member 2060 such as a reverse osmosis membrane filter or a hollow fiber membrane filter. In addition, the external filter member 2070 may include an electric deionization type filter. The electric deionization type refers to EDI (Electro Deionization), CEDI (Continuous Electro Deionization), CDI (Capacitive Deionization), etc.

[0194] The housing part 2100 may include a head member 2110 having a first partition wall 2111 for preventing the raw water W1 from mixing with the second purified water C2, a second partition wall 2112 for preventing the second purified water C2 from mixing with the third purified water C3, a third partition wall 2113 for preventing the third purified water C3 from mixing with the domestic water W2, and a fourth partition wall 2114 for preventing the domestic water W2 from mixing with the first purified water C1, and a body member 2120 extending from the head member 2110 and having the filtration part 2200 disposed therein. The first to fourth partition walls 2111, 2112, 2113, and 2114 are formed sequentially along the inner side in the radial direction r. The filtration unit 2200 may include a first upper cap member 2210 to which the spirally wound type internal filter member 2060 is fixedly disposed at the bottom, and a second upper cap member 2220 disposed a certain distance away from the upper surface of the first upper cap member 2210 so as to provide a domestic water flow path PW2 through which domestic water W2 discharged from the spirally wound type internal filter member 2060 flows. In other words, not only the incoming raw water W1, but also the outgoing first purified water C1, the incoming second purified water C2, 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 can be formed with a raw water area RW1, a first purified water area RC1, a second purified water area RC2, a third purified water area RC3 and a domestic water area RW2 through which the incoming raw water W1, the outgoing first purified water C1, the incoming second purified water C2, the outgoing third purified water C3 and the outgoing domestic water W2 flow, respectively. The first upper cap member 2210 and the second upper cap member 2220 are arranged stacked on top of each other, and the second upper cap member 2220 is arranged at a certain distance from the first upper cap member 2210 so that a domestic water flow path PW2 through which domestic water W2 discharged from the spiral-wound internal filter member 2060 flows is formed between them. For this purpose, a spacer 2220a extending downward may be provided on the lower surface of the second upper cap member 2220.In this way, in order to form independent flow paths in which the raw water W1, the first purified water C1, the second purified water C2, the third purified water C3 and the domestic water W2 do not mix, the head member 2110 has the above-mentioned first to fourth partition walls 2111, 2112, 2113, 2114 formed sequentially along the inner side in the radial direction r, and the tubes through which the raw water W1, the first purified water C1, the second purified water C2, the third purified water C3 and the domestic water W2 flow are concentrated at the top of the composite filter, thereby improving the freedom of layout design of other parts. In addition, the first upper cap member 2210 and the second upper cap member 2220 are stacked, and the first upper cap member 2210 is provided with a first through hole 2210a that connects the inside of the spiral wound type internal filter member 2060 to the domestic water flow path PW2 so that the domestic water W2 discharged from the spiral wound type internal filter member 2060 arranged below can flow into the domestic water flow path PW2. As a result, the axial height of the composite filter is reduced, miniaturization is possible, the configuration is simplified, and manufacturability is improved.

[0195] Figure 16 is a cross-sectional view showing the first to fourth upper cap members and lower cap member of a water purifier equipped with a composite filter according to another embodiment of the present invention disassembled, Figure 17 is a cross-sectional view of part II in Figure 16, and Figure 18 is a cross-sectional view of part II-II in Figure 16.

[0196] As shown in Figures 13 and 14, in a water purifier with a composite filter according to another embodiment of the present invention, a first upper cap member 2210 includes a first upward guide 2211 extending upward so that the first purified water C1 flows, and a second upper cap member 2220 includes a second upward guide 2221 extending upward so that the domestic water W2 flows, and the first upward guide 2211 and the second upward guide 2221 may be arranged at a certain distance from each other so that the domestic water flow path PW2 is extended. That is, the first purified water C1 flows inside the first upward guide 2211 formed in the first upper cap member 2210, and the discharged domestic water W2 flows inside the second upward guide 2221 formed in the second upper cap member 2220, and the first upper cap member 2210 and the second upper cap member 2220 are spaced apart from each other by a certain distance to form the domestic water flow path PW2, so that an independent flow path in which the first purified water C1 and the domestic water W2 are not mixed can be formed, and the manufacturability can be improved through the simplified configuration. In this case, as shown in Figs. 16 and 17, the spacer 2220a extending downward from the lower surface of the second upper cap member 2220 can be integrally extended in the circumferential direction to prevent the discharged domestic water W2 from mixing with the raw water W1 while flowing backward.

[0197] 13 and 14, in the water purifier having the composite filter according to the embodiment of the present invention, the first upper cap member 2210 may include a first downward guide 2212 extending downward to fix the spiral wound type internal filter member 2060. That is, the spiral wound type internal filter member 2060 is stably fixed through the first downward guide 2212 extending downward from the lower surface of the first upper cap member 2210, thereby improving the durability of the water purifier, and the water W2 generated through the spiral wound type internal filter member 2060 is configured to be discharged through the first through hole 2210a, thereby improving the operational stability of the water purifier. In this case, the second upper cap member 2220 may also be formed with a second downward guide 2222 extending downward to surround the outer circumferential surface of the first upper cap member 2210, thereby enabling stable coupling between the first upper cap member 2210 and the second upper cap member 2220. Between the first downward guide 2212 and the second downward guide 2222, an O-ring OR may be provided to prevent the discharged domestic water W2 from flowing back into the raw water flow path PW1.

[0198] 13 and 15, in a water purifier having a composite filter according to another embodiment of the present invention, a filtering unit 2200 may include a third upper cap member 2230 arranged in a stacked manner so that a post-treatment internal filter member 2080 is fixed in a state of being arranged on the top of the second upper cap member 2220, and a fourth upper cap member 2240 arranged at a certain distance from the upper surface of the third upper cap member 2230 so that a second purified water flow path PC2 through which the second purified water C2 entering from the outside flows is provided. That is, the third upper cap member 2230 and the fourth upper cap member 2240 are arranged in a stacked manner, and the post-treatment internal filter member 2080 is fixedly arranged at the bottom of the third upper cap member 2230 so that the second purified water C2 entering from the outside flows through the second purified water flow path PC2 formed between the third upper cap member 2230 and the fourth upper cap member 2240, thereby simplifying the configuration and improving manufacturability.

[0199] In this case, as shown in Figures 13 and 15, in a water purifier equipped with a composite filter according to an embodiment of the present invention, the third upper cap member 2230 includes a third upward guide 2231 extending upward so that the third purified water C3 flows, and the fourth upper cap member 2240 includes a fourth upward guide 2241 extending upward so that the second purified water C2 flows, and the third upward guide 2231 and the fourth upward guide 2241 may be arranged at a certain distance from each other so that the second purified water flow path PC2 is extended. That is, the third purified water C3 that is discharged flows inside the third upward guide 2231 formed in the third upper cap member 2230, and the second purified water C2 that is discharged flows inside the fourth upward guide 2241 formed in the fourth upper cap member 2240. Since the third upper cap member 2230 and the fourth upper cap member 2240 are spaced apart from each other by a certain distance to form the second purified water flow path PC2, it is possible to form independent flow paths in which the second purified water C2 and the third purified water C3 are not mixed, and it is possible to improve manufacturability through simplified configuration. In addition, the second upward guide 2221 and the third upward guide 2231 may also be spaced apart from each other by a certain distance to form the third purified water flow path PC3 through which the discharged third purified water C3 flows, thereby enabling stable discharge of the third purified water C3 and preventing the discharged third purified water C3 from being mixed with the discharged domestic water W2.

[0200] 13 and 15, in the water purifier having the composite filter according to the embodiment of the present invention, the third upper cap member 2230 may include a third downward guide 2232 extending downward to fix the post-treatment internal filter member 2080. The third downward guide 2232 may include a 3-1 downward guide 2232a provided on the outer side in the radial direction r to fix the outer side of the post-treatment internal filter member 2080, and a 3-2 downward guide 2232b provided on the inner side in the radial direction r to fix the inner side of the post-treatment internal filter member 2080. That is, the post-treatment internal filter member 2080 is stably fixed through the third downward guide 2232 extending downward from the lower surface of the third upper cap member 2230, thereby improving the durability of the water purifier.

[0201] 13 and 15, in the water purifier with the composite filter according to the embodiment of the present invention, the fourth upper cap member 2240 may include a fourth downward guide 2242 extending downward to surround the outer circumferential surface of the third upper cap member 2230, and the fourth downward guide 2242 may be extended to the outer circumferential surface of the second upper cap member 2220. That is, the fourth downward guide 2242 extending downward from the lower surface of the fourth upper cap member 2240 extends downward to surround the outer circumferential surface of the third upper cap member 2230 and extends to the outer circumferential surface of the second upper cap member 2220, so that the post-treatment internal filter member 2080 is stably fixed and the durability of the water purifier is improved.

[0202] In this case, as shown in Fig. 13 and Fig. 14, in the water purifier having the composite filter according to the embodiment of the present invention, the filtering unit 2200 may further include a lower cap member 2250 provided with a lower guide 2251 extending upward so that the post-treatment internal filter member 2080 is fixedly disposed on the upper portion. The lower cap member 2250 may be provided with an auxiliary lower guide 2252 disposed radially inwardly in the direction r. The auxiliary lower guide 2252 may be formed with a first portion supporting the inner side of the post-treatment internal filter member 2080 and a second portion disposed radially inwardly in the direction r from the inner surface of the post-treatment internal filter member 2080, and the auxiliary lower guide 2252 may have a stepped structure so that the first portion and the second portion are formed. The third purified water C3 flows in the space between the second portion and the post-treatment internal filter member 2080. That is, the post-treatment internal filter member 2080 is stably fixed through the lower guide 2251 formed by extending upward from the upper surface of the lower cap member 2250, thereby improving the durability of the water purifier. In addition, since the post-treatment internal filter member 2080 can be fixed through the third and fourth upper cap members 2230 and 2240 and the lower cap member 2250, it is possible to modularize the composite filter through a subassembly process, thereby improving workability. In this case, an O-ring OR may be provided between the fourth downward guide 2242 and the lower guide 2251 to prevent the second purified water C2 entering from flowing back into the raw water flow path PW1.

[0203] FIG. 19 is a cross-sectional view showing 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.

[0204] As shown in FIG. 19, in a water purifier equipped with a composite filter according to an embodiment of the present invention, a raw water flow path PW1 through which raw water W1 flows is provided between the inner surface of the body member 2120 and the outer surface of the spiral wound type internal filter member 2060, and the spiral wound type internal filter member 2060 may be positioned away from the lower surface of the body member 2120 so that the raw water flow path PW1 extends radially inward in the r direction to the bottom of the spiral wound type internal filter member 2060. That is, a raw water flow path PW1 is formed between the body member 2120 and the spiral wound type internal filter member 2060, and the spiral wound type internal filter member 2060 is spaced from the bottom surface of the body member 2120 so that the raw water flow path PW1 extends to the bottom of the spiral wound type internal filter member 2060. Therefore, the raw water W1 is configured to move to the bottom of the spiral wound type internal filter member 2060 and then pass through the spiral wound type internal filter member 2060. This allows the first purified water C1 and domestic water W2 to be produced stably in a separated state, thereby ensuring the operational stability of the water purifier.

[0205] 13, in the water purifier with the composite filter according to the embodiment of the present invention, a central tube 2061 may be provided on an inner circumferential surface of the spiral wound type internal filter member 2060, which supports the spiral wound type internal filter member 2060 to be wound in a spiral shape, and has a second through hole 2061a formed therein so that the first purified water C1 flows into a first purified water flow path PC1 formed inside the spiral wound type internal filter member 2060. That is, with the spiral wound type internal filter member 2060 wound in a spiral shape around the central tube 2061, the first upper cap member 2210 is held at the upper portion, and the domestic water W2 discharged onto the upper surface of the spiral wound type internal filter member 2060 may move to the domestic water flow path PW2 through the first through hole 2210a and then be discharged to the outside. At this time, an O-ring OR may be provided between the upper portion of the central tube 2061 and the first upward guide 2211 to prevent the discharged domestic water W2 from flowing into the first purified water flow path PC1. Also, the first purified water C1 moving through the inner surface of the spirally wound internal filter member 2060 moves to the first purified water flow path PC1 through the second through hole 2061a of the central tube 2061. That is, the central tube 2061 is provided on the inner circumferential surface of the spirally wound internal filter member 2060, and the spirally wound internal filter member 2060 is wound in a spiral shape and the first purified water flow path PC1 formed inside the spirally wound internal filter member 2060 is stably maintained, so that the first purified water C1 can flow smoothly and the operational reliability can be ensured.

[0206] 18, in the water purifier with the composite filter according to the embodiment of the present invention, the fourth upper cap member 2240 includes at least two or more first support protrusions 2243 protruding outward in the radial direction r around the outer circumferential surface, and the first support protrusions 2243 are arranged at equal intervals. That is, the first support protrusions 2243 protruding outward in the radial direction r around the outer circumferential surface of the fourth upper cap member 2240 are formed to support the inner surface of the body member 2120, so that a raw water flow path PW1 can be secured so that the raw water W1 entering from the upper part of the housing part 2100 moves to the filtration part 2200, and the first support protrusions 2243 are arranged at equal intervals, so that the raw water can move evenly around the fourth upper cap member 2240, and the product reliability can be secured through the improvement of the flow of the raw water W1. In this case, a second support protrusion protruding outward in the radial direction r may also be formed around the outer circumferential surface of the third upper cap member 2230, and the second support protrusion supports the inner surface of the fourth upper cap member 2240, so that the second purified water C2 entering from the outside can flow stably.

[0207] As shown in Fig. 11, the water purifier with the composite filter according to the embodiment of the present invention may further include a valve unit 2300 for adjusting the flow of the raw water W1, the first purified water C1, the second purified water C2, the third purified water C3, and the domestic water W2, and a control unit 2400 for controlling the operation of the valve unit 2300. The valve unit 2300 may include a first valve 2310 for adjusting the flow of the raw water W1, a second valve 2320 for adjusting the flow of the first purified water C1, a third valve 2330 for adjusting the flow of the second purified water C2, a fourth valve 2340 for adjusting the flow of the third purified water C3, and a fifth valve 2350 for adjusting the flow of the domestic water W2. That is, the valve unit 2300 may be controlled via the control unit 2400 to control the flow of the raw water W1, the first to third purified waters C1, C2, C3, and the domestic water W2, and the product reliability may be ensured by effectively preventing these fluids from flowing backward.

[0208] As described above, since raw water W1 can be input, first purified water C1 can be output, second purified water C2 can be input, and third purified water C3 can be output, as well as domestic water W2 can be output. By integrating the spiral wound type internal filter member 2060 to form a composite filter, it is possible to improve the convenience of the user. In addition, the head member 2110 of the housing part 2100 is provided with the first to fourth partition walls 2111, 2112, 2113, and 2114 so that independent flow paths are formed in which the raw water W1, the first to third purified waters C1, C2, and C3, and domestic water W2 are not mixed. As a result, the tubes through which the raw water W1, the first to third purified waters C1, C2, and C3, and domestic water W2 flow are concentrated at the top of the composite filter, improving the freedom of layout design of other parts. In the filtration part 2200, The first upper cap member 2210 and the second upper cap member 2220 are stacked, and a first through hole 2210a is formed in the first upper cap member 2210 so that the discharged domestic water W2 flows through the domestic water flow path PW2 formed between the first upper cap member 2210 and the second upper cap member 2220. This reduces the axial height of the composite filter, making it possible to reduce the size and improve manufacturability through a simplified configuration.

[0209] Fig. 20 is a block diagram showing a water purifier having a composite filter according to another embodiment of the present invention, Fig. 21 is a plan view showing a head member of the water purifier having a composite filter according to another embodiment of the present invention, Fig. 22 is a cross-sectional view showing an assembled state of a filtration unit of a water purifier having a composite filter according to another embodiment of the present invention, and Fig. 23 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 another embodiment of the present invention disassembled. Here, a means the axial direction of the composite filter, and r means the radial direction of the composite filter. In order to clearly explain the present invention, parts that are not related to the explanation are omitted from the drawings.

[0210] As shown in Figs. 20 to 23, the water purifier having the composite filter according to the present invention includes a housing 3100 having a raw water inlet port 3010 through which raw water W1 is input, a first purified water outlet port 3020 through which filtered first purified water C1 is output, an external treated water inlet port 3030 through which external treated water C1' generated by externally treating the first purified water C1 is input, a third purified water outlet port 3040 through which filtered third purified water C3 is output, and a domestic water outlet port 3050 through which domestic water W2 generated during the filtration process is output. the housing part 3100 includes a filtration part 3200 having a pre-treatment internal filter member 3060 arranged outside the housing part 3100 to treat the first purified water C1 to produce externally treated water C1', a spiral-wound internal filter member 3080 arranged inside the housing part 3100 to filter the externally treated water C1' to produce second purified water C2, and a post-treatment internal filter member 3090 arranged inside the housing part 3100 and stacked below the pre-treatment internal filter member 3060 to filter the second purified water C2 to produce third purified water C3. That is, the raw water W1 input through the raw water inlet port 3010 passes through the pre-treatment internal filter member 3060 installed in the filtration unit 3200, is output to the outside through the first purified water outlet port 3020, passes through the external treatment member 3070, is further input through the external treatment water inlet port 3030, is filtered sequentially through the spiral wound type internal filter member 3080 and the post-treatment internal filter member 3090, and finally, the filtered third purified water C3 is output through the third purified water outlet port 3040 and then provided to the user. Alternatively, it may be stored in a separate purified water storage unit, or may be supplied to the cold water generating unit, the hot water generating unit, and the ice generating unit to generate cold water, hot water, and ice.In addition, the externally treated water C1' that has entered the water moves to the lower side of the spirally wound type internal filter member 3080 and then moves to the inside of the spirally wound type internal filter member 3080, and the domestic water W2 generated while the externally treated water C1' is filtered by the spirally wound type internal filter member 3080 is discharged to the outside of the housing unit 3100 through the domestic water discharge port 3050, and then discharged to the outside of the water purifier through a separate tube. By configuring in this way to enable not only the raw water W1 to enter and the purified water C to exit, but also the domestic water W2 to be discharged, it is possible to realize an additional function using the external treatment member 3070 in the process in which the raw water W1 passes through the composite filter, and the spirally wound type internal filter member 3080 can be integrated to form a composite filter, improving the convenience of the user. In this case, the pre-treatment internal filter member 3060 may be a pre-carbon filter or a microfiltration (MF) filter, and the post-treatment internal filter member 3090 may be a post-carbon filter or a microfiltration (MF) filter. Alternatively, the pre-treatment internal filter member 3060 and the post-treatment internal filter member 3090 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 internal filter member 3060. As an example, such a filter member may be an NT filter member. Such an NT filter member may be made of a material, for example, a nano-trap material, that is electrostatically charged so as to adsorb foreign matter contained in the inflowing raw water W1. Such a material may be configured to be positively charged. As a result, negatively charged foreign matter, for example, viruses, bacteria, and fine particles, contained in the raw water W1, can be adsorbed to the NT filter member by static electricity. Also, such a filter member may be a sediment filter member. The above-mentioned spirally wound internal filter member 3080 may be a reverse osmosis membrane filter or a hollow fiber membrane filter.In this case, the external treatment member 3070 may be a separate functional filter (deionization filter for removing heavy metals) or a pump for increasing the pressure of the first purified water C1. Meanwhile, the external treatment member 3070 is not limited to a member that performs physical / chemical treatment on the first purified water C1 using another filter, etc., and may include a temporary tank for temporarily storing the first purified water C1.

[0211] As shown in FIG. 21, the housing unit 3100 includes a head member 3110 having a first partition wall 3111 for preventing the raw water W1 and the first purified water C1 from mixing, a second partition wall 3112 for preventing the first purified water C1 and the externally treated water C1' from mixing, a third partition wall 3113 for preventing the externally treated water C1' from mixing and the domestic water W2, and a fourth partition wall 3114 for preventing the third purified water C3 from mixing and the raw water W1, and a body member 3120 extending from the head member 3110 and having a filtration unit 3200 arranged therein. In other words, not only the incoming raw water W1, but also the outgoing first purified water C1, the incoming externally treated water C1', 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 3110 is formed with a raw water area RW1 where the raw water W1 enters, a first purified water area RC1 where the first purified water C1 exits, an externally treated water area RC1' where the externally treated water C1' enters, a third purified water area RC3 where the third purified water C3 exits, and a domestic water area RW2 where the domestic water W2 is discharged. To this end, the head member 3110 of the housing section 3100 is provided with the above-mentioned first to fourth partition walls 3111, 3112, 3113, 3114 so as to form independent flow paths in which the raw water W1, the first purified water C1, the externally treated water C1', the third purified water C3 and the domestic water W2 do not mix, so that the tubes through which the raw water W1, the first purified water C1, the externally treated water C1', the third purified water C3 and the domestic water W2 flow are concentrated at the top of the composite filter, thereby improving the freedom of layout design of other parts.

[0212] 22 and 23, the filtering unit 3200 includes a first upper cap member 3210 having a pre-treatment internal filter member 3060 disposed radially outward and a spirally wound internal filter member 3080 disposed radially inward, and a second upper cap member 3220 having a post-treatment internal filter member 3090 disposed radially outward and a spirally wound internal filter member 3080 disposed radially inward, disposed at a lower portion thereof. The second upper cap member 3220 fixes the post-treatment internal filter member 3090 in a state in which the post-treatment internal filter member 3090 is stacked at the bottom of the pre-treatment internal filter member 3060, and a first through hole 3220a through which the spirally wound internal filter member 3080 passes may be formed in the second upper cap member 3220. In addition, a first downward support guide 3212 extending downward along the axial direction a may be formed in the first upper cap member 3210. The first downward support guide 3212 may include a 1-1 downward support guide 3212a disposed on the outer side in the radial direction r to fix the pre-treatment internal filter member 3060, and a 1-2 downward support guide 3212b disposed on the inner side in the radial direction r. 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 to fix the post-treatment internal filter member 3090, and a 2-2 downward support guide 3221b disposed on the inner side in the radial direction r. When the first downward support guide 3212 and the second downward support guide 3221 are formed in this manner, the pre-treatment internal filter member 3060 and the post-treatment internal filter member 3090 are stably fixed, and the durability of the water purifier is improved. In other words, in the filtration section 3200, a pre-treatment internal filter member 3060 and a post-treatment internal filter member 3090 are stacked via a first upper cap member 3210 and a second upper cap member 3220, and a spiral wound type internal filter member 3080 is arranged radially inward of these internal filter members in the r direction, thereby enabling a composite filter to be manufactured using a pre-manufactured spiral wound type internal filter member 3080, thereby improving manufacturability.Even if a new spiral wound type internal filter element 3080 is manufactured, by increasing the length in the axial direction a, the same filtering performance can be ensured even if the thickness is reduced, and at the same time, the composite filter can be slimmed down.

[0213] FIG. 24 is a cross-sectional view showing a state in which a filtering unit of a water purifier having a composite filter according to still another embodiment of the present invention is installed in a housing unit.

[0214] 22 and 23, in a water purifier having a composite filter according to another embodiment of the present invention, a filtering unit 3200 further includes a second lower cap member 3230 having a post-treatment internal filter member 3090 and a spirally wound internal filter member 3080 fixed thereon, and the second lower cap member 3230 may include a connecting tube 3231 disposed radially outward of the spirally wound internal filter member 3080 to prevent the first purified water C1 and the third purified water C3 from being mixed with the external treated water C1'. In this case, as shown in FIG. 24, the connecting tube 3231 is disposed between the pre-treatment internal filter member 3060 and the spirally wound internal filter member 3080, and is configured to separate the first purified water flow path PC1 and the external treated water flow path PC1', and at the same time, separate the third purified water flow path PC3 and the external treated water flow path PC1' disposed between the post-treatment internal filter member 3090 and the spirally wound internal filter member 3080. That is, a connecting tube 3231 is provided on the second lower cap member 3230 which fixes the post-treatment internal filter member 3090 and the spiral wound type internal filter member 3080, and this connecting tube 3231 is formed to extend along the axial direction a inside the pre-treatment internal filter member 3060 and the post-treatment internal filter member 3090. Therefore, the first purified water C1 which has passed through the pre-treatment internal filter member 3060 and the third purified water C3 which has passed through the post-treatment internal filter member 3090 are prevented from mixing with the externally treated water C1' which has entered, thereby ensuring the operational stability of the water purifier.

[0215] 22 and 23, in a water purifier including a composite filter according to another embodiment of the present invention, the filtering unit 3200 may further include a third upper cap member 3240 that is stacked under the first upper cap member 3210 and spaced apart from the first upper cap member 3210 so that the first purified water C1 flows through the first purified water flow path PC1. That is, the third upper cap member 3240 is disposed under the first upper cap member 3210 and spaced apart from the first upper cap member 3210 so that the first purified water flow path PC1 through which the first purified water C1 flows is formed, so that the first purified water C1 can be stably discharged, thereby ensuring the operational stability of the water purifier.

[0216] 22 and 23, in a water purifier having a composite filter according to another embodiment of the present invention, a first spacer 3210a extending downward may be provided on a lower surface of the first upper cap member 3210 to support an upper surface of the third upper cap member 3240. That is, the first spacer 3210a extending downward from the lower surface of the first upper cap member 3210 supports an upper surface of the third upper cap member 3240, so that the separation distance between the first upper cap member 3210 and the third upper cap member 3240 is stably maintained, and the structural stability of the composite filter is improved.

[0217] 22 and 23, in a water purifier having a composite filter according to another embodiment of the present invention, a first upper cap member 3210 includes a first upward guide 3211 extending upward, and a third upper cap member 3240 includes a third upward guide 3241 extending upward, and the first upward guide 3211 and the third upward guide 3241 may be spaced apart from each other to form a first purified water flow path PC1 as shown in Fig. 24. That is, the first upward guide 3211 and the third upward guide 3241 are spaced apart from each other to form an extended first purified water flow path PC1, and the first purified water C1 is smoothly discharged, thereby ensuring the operational stability of the water purifier.

[0218] 22 and 23, in a water purifier having a composite filter according to another embodiment of the present invention, the first partition wall 3111 may be disposed to extend in the axial direction a along the first upward guide 3211. The first partition wall 3111 may be disposed to extend in the axial direction a along the first upward guide 3211, and 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 first upward guide 3211, the first partition wall 3111 may be coupled to the inner surface of the first upward guide 3211, or the first partition wall 3111 may be coupled to the upper end of the first upward guide 3211. In other words, by axially extending the first partition wall 3111 along the first upward guide, the first purified water being discharged is effectively prevented from mixing with the incoming raw water, and user satisfaction can be improved by improving the water quality of the third purified water C3 that is finally discharged.

[0219] 22 and 23, in a water purifier with a composite filter according to another embodiment of the present invention, the second partition wall 3112 may be disposed to extend in the axial direction a along the third upward guide 3241. The second partition wall 3112 may be disposed to extend in the axial direction a along the third upward guide 3241, and when the head member 3110 and the body member 3120 are coupled to each other, the second partition wall 3112 may be coupled to cover the outer surface of the third upward guide 3241, the second partition wall 3112 may be coupled to fit into the inner surface of the third upward guide 3241, or the second partition wall 3112 may be coupled to the upper end of the third upward guide 3241. In other words, by extending the second partition wall 3112 in the axial direction a along the third upward guide 3241, the outgoing first purified water C1 is effectively prevented from mixing with the incoming externally treated water C1', thereby preventing a deterioration in the quality of the externally treated water C1' and improving the quality of the third purified water C3 that is finally outgoing, thereby improving user satisfaction.

[0220] Meanwhile, as shown in Fig. 22 and Fig. 23, in a water purifier with a composite filter according to another embodiment of the present invention, a third upper cap member 3240 may include a third downward support guide 3242 that is arranged to extend downward to be coupled to a connecting tube 3231 in order to prevent the first purified water C1 from being mixed with the externally treated water C1'. The third downward support guide 3242 and the connecting tube 3231 may be arranged to overlap along the axial direction a, and an O-ring OR may be provided between them to block the flow of the first purified water C1. That is, the third downward support guide 3242 formed to extend downward on the third upper cap member 3240 is coupled to the connecting tube 3231 to effectively prevent the outgoing first purified water C1 from being mixed with the incoming externally treated water C1', thereby preventing deterioration in the quality of the externally treated water C1' and improving the quality of the third purified water C3 that is finally outgoing, thereby improving user satisfaction.

[0221] 22 and 23, in a water purifier including a composite filter according to another embodiment of the present invention, the filtering unit 3200 may further include a fourth upper cap member 3250 that is stacked under the third upper cap member 3240 and spaced apart from the third upper cap member 3240 so that the externally treated water C1' flows through the externally treated water flow path PC1' as shown in Fig. 24. That is, the fourth upper cap member 3250 is disposed under the third upper cap member 3240 and spaced apart from the third upper cap member 3240 so that the externally treated water flow path PC1' through which the externally treated water C1' flows is formed, so that the externally treated water C1' flows stably, thereby ensuring the operational stability of the water purifier.

[0222] 22 and 23, in a water purifier having a composite filter according to another embodiment of the present invention, a second spacer 3240a extending downward may be provided on a lower surface of the third upper cap member 3240 to support an upper surface of the fourth upper cap member 3250. That is, the second spacer 3240a extending downward from the lower surface of the third upper cap member 3240 supports an upper surface of the fourth upper cap member 3250, so that the separation distance between the third upper cap member 3240 and the fourth upper cap member 3250 is stably maintained, and the structural stability of the composite filter is improved.

[0223] 22 and 23, in a water purifier with a composite filter according to still another embodiment of the present invention, a fourth upper cap member 3250 includes a fourth upward guide 3251 extending upward, and as shown in Fig. 24, the fourth upward guide 3251 may be disposed apart from the third upward guide 3241 so as to form an external treated water flow path PC1'. That is, as the fourth upward guide 3251 is disposed apart from the third upward guide 3241, an external treated water flow path PC1' is formed, and the external treated water C1' flows smoothly, thereby ensuring the operational stability of the water purifier.

[0224] 22 and 23, in a water purifier having a composite filter according to another embodiment of the present invention, the third partition wall 3113 may be disposed to extend in the axial direction a along the fourth upward guide 3251. The third partition wall 3113 may be disposed to extend in the axial direction a along the fourth upward guide 3251, and when the head member 3110 and the body member 3120 are coupled to each other, the third partition wall 3113 may be coupled to cover the outer surface of the fourth upward guide 3251, the third partition wall 3113 may be coupled to the inner surface of the fourth upward guide 3251, or the third partition wall 3113 may be coupled to the upper end of the fourth upward guide 3251. In other words, by extending the third partition wall 3113 in the axial direction a along the fourth upward guide 3251, the incoming externally treated water C1' is effectively prevented from mixing with the outgoing domestic water W2, thereby improving user satisfaction by preventing a deterioration in the quality of the externally treated water C1' and improving the quality of the third purified water C3 that is finally discharged.

[0225] 25 is a cross-sectional view of a portion II in FIG. 23, FIG. 26 is a cross-sectional view of a portion II-II in FIG. 23, and FIG. 27 is a cross-sectional view of a portion III-III in FIG.

[0226] Meanwhile, as shown in Figures 22 and 23, in a water purifier with a composite filter according to yet another embodiment of the present invention, a fourth upper cap member 3250 may include a fourth downward support guide 3252 extending downward along the axial direction a to surround a spiral wound type internal filter member 3080. Such a spiral wound type internal filter member 3080 may be provided with a separate packing PK supported by the fourth downward support guide 3252. That is, as the spiral wound type internal filter member 3080 is supported by the fourth downward support guide 3252, the structural stability of the composite filter is improved. As shown in FIG. 25, the fourth upper cap member 3250 has a third support protrusion 3253 extending outward in the radial direction r, and a plurality of the third support protrusions 3253 are configured to support the inner surface of the connecting tube 3231 while being spaced apart from each other, thereby improving structural stability and allowing the incoming externally treated water C1' to flow smoothly, thereby ensuring the operational stability of the water purifier.

[0227] Meanwhile, in a water purifier having a composite filter according to another embodiment of the present invention, as shown in Fig. 22, the filtering unit 3200 supports the spirally wound inner filter member 3080 to be wound in a spiral shape, and further includes a central tube 3081 having a second purified water through hole 3081a formed therein so that the second purified water C2 flows inside, and the second lower cap member 3230 may include a second through hole 3230a through which the central tube 3081 is disposed to pass so that the second purified water C2 flowing through the central tube 3081 flows downward. The lower part of the central tube 3081 is configured to be supported on the lower surface of the housing unit 3100 while passing through the second through hole 3230a. In this central tube 3081, a through portion TH1 that penetrates the second through hole 3230a is formed, and a second water purification through hole 3081a is also formed in this through portion TH1. The second purified water C2 that moves to the inside of the central tube 3081 through the second water purification through hole 3081a formed in the non-penetrating portion TH2 of the central tube 3081 moves to the lower part of the central tube 3081 and then moves to the lower part of the second lower cap member 3230 through the second water purification through hole 3081a formed in the through portion TH1. In other words, with the spirally wound internal filter member 3080 supported in a spirally wound manner around the central tube 3081, the second purified water C2 moves into the inside of the central tube 3081 through the second purified water through hole 3081a, improving structural stability, and since the central tube 3081 is positioned to penetrate the second lower cap member 3230, the second purified water C2 flows stably to the bottom of the second lower cap member 3230, improving the operational stability of the water purifier.

[0228] 22 and 23, in a water purifier with a composite filter according to another embodiment of the present invention, the second lower cap member 3230 includes a second downward guide 3232 extending downward, and the second downward guide 3232 may include a third through hole 3232a through which the second purified water C2 that has moved to the lower part of the second lower cap member 3230 flows. In this manner, the second purified water C2 that has moved to the lower part of the second lower cap member 3230 moves from the central part in the radial direction r to the outer side in the radial direction r, and then moves around the second lower cap member 3230 to the post-treatment internal filter member 3090. As shown in FIG. 26, the second lower cap member 3230 is formed with a second support protrusion 3233 extending outward in the radial direction r, and the second support protrusions 3233 are arranged to support the inner surface of the body member 3120 of the housing part 3100 while being spaced apart from each other, thereby improving structural stability and allowing the second purified water C2 to flow smoothly. The second lower cap member 3230 may be formed with a second upward support guide 3234 extending upward along the axial direction a. The second upward support guide 3234 may include a 2-1 upward support guide 3234a arranged outward in the radial direction r to fix the post-treatment internal filter member 3090, and a 2-2 upward support guide 3234b arranged inward in the radial direction r. When the second upward support guide 3234 is formed in this manner, the post-treatment internal filter member 3090 is stably fixed, and the durability of the water purifier is improved. In addition, the post-treatment internal filter member 3090 is sub-assembled through the second upper cap member 3220 and the second lower cap member 3230, improving workability. That is, since the second downward guide 3232 supports the lower surface of the housing part 3100, the separation state between the second lower cap member 3230 and the lower surface of the housing part 3100 is stably maintained, and the second purified water C2 that moves to the lower part of the second lower cap member 3230 moves smoothly through the third through hole 3232a formed in the second downward guide 3232, thereby ensuring the operational stability of the water purifier.

[0229] Meanwhile, as shown in Fig. 22 and Fig. 23, in a water purifier with a composite filter according to another embodiment of the present invention, the filtering unit 3200 further includes a first lower cap member 3260 on which the pre-treatment internal filter member 3060 is fixed, and the first lower cap member 3260 may include a third spacer 3260a extending downward to be supported on the upper surface of the second upper cap member 3220 so as to form a third purified water flow path PC3 through which the third purified water C3 flows, as shown in Fig. 24. The first lower cap member 3260 may be formed with a first upward support guide 3261 extending upward along the axial direction a. The first upward support guide 3261 may include a 1-1 upward support guide 3261a disposed on the outer side in the radial direction r to fix the pre-treatment internal filter member 3060, and a 1-2 upward support guide 3261b disposed on the inner side in the radial direction r. When the first upward support guide 3261 is formed in this manner, the pre-treatment internal filter member 3060 is stably fixed, and the durability of the water purifier is improved. That is, the pre-treatment internal filter member 3060 can be fixed by disposing the first upper cap member 3210 and the first lower cap member 3260 on the upper and lower parts of the pre-treatment internal filter member 3060, respectively, so that the composite filter can be modularized through a subassembly process, and workability is improved. Since the third spacer 3260a supported on the upper surface of the second upper cap member 3220 is extended downward on the lower surface of the first lower cap member 3260, the gap between them is stably maintained, and the third purified water C3 flows smoothly, so that the operational stability of the water purifier can be ensured.

[0230] 22 and 23, in a water purifier having a composite filter according to another embodiment of the present invention, the filtering unit 3200 is stacked on the first upper cap member 3210, and further includes a fifth upper cap member 3270 spaced apart from the first upper cap member 3210 so that the raw water W1 flows through the raw water flow path PW1 as shown in FIG 24, and the fifth upper cap member 3270 may include a fourth spacer 3270a extending downward to be supported on the upper surface of the first upper cap member 3210. As shown in FIG 27, the first upper cap member 3210 is formed with a first support protrusion 3213 extending outward in the radial direction r, and the first support protrusions 3213 are configured to support the inner surface of the fifth upper cap member 3270 while being spaced apart from each other, thereby improving structural stability and allowing the incoming raw water W1 to flow smoothly. That is, the fifth upper cap member 3270 is positioned above the first upper cap member 3210 and is positioned away from the first upper cap member 3210 so as to form a raw water flow path PW1 through which the raw water W1 flows, thereby ensuring the stable flow of the raw water W1 and the operational stability of the water purifier.

[0231] 22 and 23, in a water purifier with a composite filter according to another embodiment of the present invention, the fifth upper cap member 3270 includes a fifth upward guide 3271 extending upward, and as shown in Fig. 24, the fifth upward guide 3271 may be disposed apart from the first upward guide 3211 so as to form the raw water flow path PW1. That is, as the fifth upward guide 3271 is disposed apart from the first upward guide 3211, the raw water flow path PW1 is formed, and the input raw water W1 flows smoothly, thereby ensuring the operational stability of the water purifier.

[0232] 22 and 23, in a water purifier with a composite filter according to another embodiment of the present invention, the fourth partition wall 3114 may be disposed to extend in the axial direction a along the fifth upward guide 3271. The fourth partition wall 3114 may be disposed to extend in the axial direction a along the fifth upward guide 3271, and when the head member 3110 and the body member 3120 are coupled to each other, the fourth partition wall 3114 may be coupled to cover the outer surface of the fifth upward guide 3271, the fourth partition wall 3114 may be coupled to the inner surface of the fifth upward guide 3271, or the fourth partition wall 3114 may be coupled to the upper end of the fifth upward guide 3271. In other words, by extending the fourth compartment wall 3114 in the axial direction a along the fifth upward guide 3271, the incoming externally treated water C1' is effectively prevented from mixing with the outgoing domestic water W2, thereby improving user satisfaction by preventing a deterioration in the water quality of the externally treated water C1' and improving the water quality of the third purified water C3 that is finally discharged.

[0233] 22 and 23, in a water purifier with a composite filter according to another embodiment of the present invention, the fifth upper cap member 3270 includes a fifth downward support guide 3272 extending downward, and the fifth downward support guide 3272 may be extended to the first lower cap member 3260. That is, since the fifth downward support guide 3272 is extended from the first upper cap member 3210 to the first lower cap member 3260, the incoming raw water W1 and the outgoing third purified water C3 do not mix, and the operational stability of the water purifier can be ensured.

[0234] FIG. 28 is a diagram showing the overall water piping of a water purifier having a composite filter according to still another embodiment of the present invention.

[0235] Meanwhile, as shown in Fig. 28, the water purifier with the composite filter according to another embodiment of the present invention may further include a valve unit 3300 for controlling the flow of the raw water W1, the first purified water C1, the externally treated water C1', the third purified water C3, and the domestic water W2, and a control unit 3400 for controlling the operation of the valve unit 3300. The valve unit 3300 may include a first valve 3310 for controlling the flow of the raw water W1, a second valve 3320 for controlling the flow of the first purified water C1, a third valve 3330 for controlling the flow of the externally treated water C1', a fourth valve 3340 for controlling the flow of the third purified water C3, and a fifth valve 3350 for controlling the flow of the domestic water W2. In this case, the raw water W1 entering the water is moved to a state where the pressure is reduced through the pressure reducing valve 3011. In other words, by controlling the valve section 3300 via the control section 3400, the flow of the raw water W1, the first purified water C1, the externally treated water C1', the third purified water C3 and the domestic water W2 can be controlled, and by effectively preventing these fluids from flowing back, product reliability can be ensured.

[0236] As described above, the water purifier having the composite filter according to the present invention is capable of not only inputting raw water W1, outputting first purified water C1, inputting externally treated water C1', and outputting third purified water C3, but also outputting domestic water W2. Therefore, an additional function can be realized by using the external treatment member 3070 in the process in which the raw water W1 passes through the composite filter. The convenience of the user is improved by forming a composite filter by integrating a spiral wound type internal filter member 3080. The head member 3110 of the housing part 3100 is provided with the first to fourth partition walls 3111, 3112, 3113, 3114, 3116, 3118, 3119, 3120, 3121, 3122, 3123, 3124, 3125, 3126, 3127, 3128, 3129, 3130, 3131, 3132, 3133, 3134, 3135, 3136, 3137, 3138, 3139, 3140, 3141, 3142, 3143, 3144, 3145, 3146, 3147, 3148, 3149, 3150, 3151, 3152, 3153, 3154, 3155, 3156, 3157, 3158, 3159, 3160, 3161, 3162, 3163, 3164, 3165, 3166, 3167, 3168, 3169, 3170, 3171, By providing 4, the tubes through which the raw water W1, the first purified water C1, the externally treated water C1', the third purified water C3 and the domestic water W2 flow are concentrated at the top of the composite filter, improving the freedom of layout design of other parts. In the filtration section 3200, the pre-treatment internal filter member 3060 and the post-treatment internal filter member 3090 are stacked via the first upper cap member 3210 and the second upper cap member 3220, and a spiral wound type internal filter member 3080 is arranged inside these internal filter members in the radial direction r, so that the composite filter can be manufactured using the already manufactured spiral wound type internal filter member 3080, improving manufacturability.

[0237] 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 can easily propose other embodiments by adding, changing, deleting, adding, etc., components within the scope of the same concept, which can also be said to fall within the scope of the concept of the present invention.

Claims

1. a housing portion including a raw water inlet port for receiving raw water, a second purified water outlet port for discharging filtered second purified water, an external treated water inlet port for receiving external treated water generated by treating the second purified water externally, a third purified water outlet port for discharging filtered third purified water, and a domestic water outlet port for discharging domestic water generated during the filtration process; a pre-treatment internal filter member disposed inside the housing portion to filter the raw water to generate a first purified water, a spiral-wound internal filter member disposed inside the housing portion to filter the first purified water to generate a second purified water, an external treatment member disposed outside the housing portion to treat the second purified water to generate the external treated water, and a post-treatment internal filter member disposed inside the housing portion to filter the incoming external treated water to generate the third purified water, The housing portion includes a head member including a first partition wall for preventing the raw water and the external treated water from being mixed, a second partition wall for preventing the raw water and the domestic water from being mixed, a third partition wall for preventing the second purified water and the domestic water from being mixed, and a fourth partition wall for preventing the second purified water and the third purified water from being mixed, and a body member extending from the head member and having the filtration portion disposed therein; the filtration section includes a first module in which the pre-treatment internal filter member and the spiral-wound internal filter member are sequentially provided, and a second module that is stacked under the first module and includes the post-treatment internal filter member, The second module includes a discharge tube member disposed through a center of the first module so that the third purified water is discharged to the outside.

2. the first module includes a central tube that supports the spirally wound internal filter member so that the spirally wound internal filter member is wound in a spiral shape and has a second purified water through hole formed therein so that the second purified water flows therethrough; 2. The water purifier with a composite filter according to claim 1, wherein the discharge tube member is disposed through a center of the central tube and spaced apart from the central tube by a predetermined distance so that a second purified water flow path through which the second purified water flows is formed between the central tube and the discharge tube member.

3. 3. The water purifier having a composite filter according to claim 2, wherein the fourth partition wall is disposed to extend in an axial direction along the discharge tube member.

4. 3. The water purifier according to claim 2, wherein the third partition wall is disposed to extend in an axial direction along the central tube.

5. the first module includes a first top cap member having the pre-treatment internal filter element disposed radially outwardly and the spiral wound internal filter element disposed radially inwardly; 3. The water purifier with a composite filter according to claim 2, wherein the first upper cap member includes a first upward guide disposed at a predetermined distance from the central tube so as to form a domestic water flow path through which the discharged domestic water flows.

6. The water purifier having a composite filter according to claim 5 , wherein the second partition wall is disposed to extend in an axial direction along the first upward guide.

7. 6. The water purifier having a composite filter according to claim 5, wherein the first module further comprises a first lower cap member to which the pre-treatment internal filter member is fixedly disposed.

8. a housing portion including a raw water inlet port for receiving raw water, a first purified water outlet port for discharging a first purified water that has been filtered, a second purified water inlet port for receiving a second purified water that has been filtered externally, a third purified water outlet port for discharging a third purified water that has been filtered, and a domestic water outlet port for discharging domestic water generated during the filtration process; a filtration unit including: a spiral-wound internal filter member disposed inside the housing unit to filter the raw water to generate the first purified water; an external filter member disposed outside the housing unit to filter the first purified water to generate the second purified water; and a post-treatment internal filter member disposed inside the housing unit to filter the second purified water to generate the third purified water, The housing portion includes a head member including a first partition wall for preventing the raw water from being mixed with the second purified water, a second partition wall for preventing the second purified water from being mixed with the third purified water, a third partition wall for preventing the third purified water from being mixed with the domestic water, and a fourth partition wall for preventing the domestic water from being mixed with the first purified water, and a body member extending from the head member and having the filtration portion disposed therein; the filtering unit includes a first upper cap member having the spiral-wound internal filter member fixed to a lower portion thereof, and a second upper cap member disposed at a predetermined distance from an upper surface of the first upper cap member to provide a domestic water flow path through which the domestic water discharged from the spiral-wound internal filter member flows; a first upper cap member including a first through hole that connects the inside of the spiral-wound internal filter member to the domestic water flow path so that the domestic water discharged from the spiral-wound internal filter member disposed at a lower portion can flow into the domestic water flow path.

9. The first upper cap member includes a first upward guide extending upward so that the first purified water flows, The second upper cap member includes a second upward guide extending upward so that the domestic water flows, 10. The water purifier according to claim 8, wherein the first upward guide and the second upward guide are spaced apart from each other by a predetermined distance so that the domestic water flow path is extended.

10. 10. The water purifier with a composite filter according to claim 8, wherein the first upper cap member includes a first downward guide extending downward to fix the spiral-wound inner filter member thereon.

11. 9. The water purifier with a composite filter as claimed in claim 8, wherein the filtration unit includes a third upper cap member that is stacked and fixed so that the post-treatment internal filter member is disposed on the top of the second upper cap member, and a fourth upper cap member that is spaced a certain distance from an upper surface of the third upper cap member so as to provide a second purified water flow path through which the second purified water entering from the outside flows.

12. a raw water flow passage through which the raw water flows is provided between an inner peripheral surface of the body member and an outer peripheral surface of the spiral-wound internal filter member; and 9. The water purifier with a composite filter according to claim 8, wherein the spiral-wound inner filter member is disposed spaced apart from a lower surface of the body member such that the raw water flow passage extends radially inward to a lower portion of the spiral-wound inner filter member.

13. 13. The water purifier with a composite filter according to claim 12, wherein a central tube is provided on an inner peripheral surface of the spiral-wound type internal filter member, the central tube supporting the spiral-wound type internal filter member so as to be wound in a spiral shape, and the central tube has a second through hole formed therein so that the first purified water flows into a first purified water flow path formed inside the spiral-wound type internal filter member.

14. a housing portion including a raw water inlet port for receiving raw water, a first purified water outlet port for discharging filtered first purified water, an external treated water inlet port for receiving external treated water generated by treating the first purified water externally, a third purified water outlet port for discharging filtered third purified water, and a domestic water outlet port for discharging domestic water generated during the filtration process; a pre-treatment internal filter member disposed inside the housing portion to filter the raw water to produce the first purified water; an external treatment member disposed outside the housing portion to treat the first purified water to produce the external treated water; a spiral-wound internal filter member disposed inside the housing portion to filter the external treated water to produce the second purified water; and a post-treatment internal filter member disposed inside the housing portion and stacked below the pre-treatment internal filter member to filter the second purified water to produce the third purified water, The housing portion includes a head member including a first partition wall for preventing the raw water and the first purified water from being mixed, a second partition wall for preventing the first purified water and the externally treated water from being mixed, a third partition wall for preventing the externally treated water and the domestic water from being mixed, and a fourth partition wall for preventing the third purified water and the raw water from being mixed, and a body member extending from the head member and having the filtration portion disposed therein; a first upper cap member having a lower portion on which the pre-treatment internal filter element arranged radially outward and the spiral-wound internal filter element arranged radially inward are arranged, and a second upper cap member having a lower portion on which the post-treatment internal filter element arranged radially outward and the spiral-wound internal filter element arranged radially inward are arranged to pass through.

15. the filtering unit further includes a second lower cap member having the post-treatment internal filter member and the spiral-wound internal filter member fixed thereto, The water purifier with the composite filter of claim 14, wherein the second lower cap member is disposed radially outside the spiral-wound internal filter member and includes a connecting tube that prevents the first purified water and the third purified water from mixing with the external treated water.

16. 16. The water purifier with a composite filter according to claim 15, wherein the filtering unit further comprises a third upper cap member that is stacked under the first upper cap member and spaced apart from the first upper cap member so that the first purified water is discharged to the outside through a first purified water flow path.

17. 17. The water purifier with a composite filter according to claim 16, wherein a first spacer is provided on a lower surface of the first upper cap member, the first spacer extending downward to support an upper surface of the third upper cap member.

18. The first upper cap member includes a first upward guide extending upward, the third upper cap member includes a third upward guide extending upwardly; and 17. The water purifier of claim 16, wherein the first upward guide and the third upward guide are spaced apart from each other to form the first purified water flow path.

19. 17. The water purifier with a composite filter according to claim 16, wherein the third upper cap member includes a third downward support guide extending downward to be connected to the connecting tube to prevent the first purified water from being mixed with the external treated water.

20. the filtering unit further includes a central tube that supports the spirally wound internal filter member so that the spirally wound internal filter member is wound in a spiral shape and has a second purified water through hole formed therein so that the second purified water can flow therethrough, 17. The water purifier according to claim 16, wherein the second lower cap member includes a second through hole through which the central tube is disposed so that the second purified water flowing through the central tube flows downward.

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