Composite filter cartridges and water purifiers including them

Abstract

This invention relates to a composite filter element and a water purifier including the same, which not only enables raw water intake and purified water output, but also enables washing water discharge. By integrating the filter element components into a single composite filter element, user convenience is improved. Furthermore, a first partition wall and a second partition wall are provided in the head component of the outer casing to form independent flow paths for raw water, purified water, and washing water, preventing them from mixing. This concentrates the flow channels of raw water, purified water, and washing water in the upper part of the composite filter element, thereby increasing the freedom of layout design for other parts. In the filtration section, the second filter element component is arranged to surround the first filter element component via a first top cover component, a second top cover component, and a third top cover component. The composite filter element is manufactured using the pre-manufactured first filter element component, thereby improving manufacturability.

Description

Technical Field

[0001] This invention relates to a composite filter element and a water purifier including the same, which not only enables raw water intake and purified water output, but also enables washing water discharge. By integrating the filter element components into a single composite filter element, user convenience is improved. Furthermore, a first partition wall and a second partition wall are provided in the head component of the outer shell to form independent flow paths for raw water, purified water, and washing water, preventing them from mixing. This concentrates the flow channels of raw water, purified water, and washing water in the upper part of the composite filter element, thereby increasing the freedom of layout design for other parts. Moreover, the composite filter element is manufactured using a pre-manufactured first filter element component, thereby improving manufacturability. Background Technology

[0002] Typically, a water purifier is a device that filters incoming raw water into purified drinking water and provides it to the user. To filter the raw water, such water purifiers use multiple filter cartridges. When these cartridges are combined and used in the manner described above, the internal layout of the water purifier becomes complex, increasing the volume occupied by each filter cartridge and thus increasing the overall size of the water purifier. Therefore, to solve this problem, composite filter cartridges that integrate all filter elements are sometimes used.

[0003] A water purification device disclosed in Korean Patent Publication No. 10-2012-0054919 of LG Electronics Co., Ltd. includes a composite filter element. This composite filter element includes a first filtration section and a second filtration section, each selected from known filter elements such as activated carbon filters, sedimentation filters, ceramic filters, and ultrafiltration filters. However, in this composite filter element, the raw water inlet and purified water outlet are separated into the upper and lower sides of the filter element housing, resulting in a complex internal layout for the water purifier. Furthermore, this composite filter element lacks a structure for washing the filter element, leading to a faster replacement cycle for the composite filter element.

[0004] Korean Patent Publication No. 10-2015-0067664, published by Kovico Co., Ltd., discloses a water purifier filter element. This filter element includes a first filter element comprising a non-woven fabric composite layer and an activated carbon filter element comprising granular activated carbon. However, this composite filter element lacks a flow path for the flow of washing water, thus increasing the replacement cycle of the composite filter element and consequently raising the management costs of the water purifier.

[0005] A water purifier disclosed in Korean Patent Publication No. 10-2010-0133123 of Kovitech Co., Ltd. includes a backwashable water filter element. This water purifier includes a backwashing section that washes the water filter element using residual water present in the filtration section and washing water stored in a washing water storage tank connected to the filtration section. However, this backwashing section is provided independently of the water filter element, resulting in an increase in the overall size of the water purifier. Summary of the Invention

[0006] The problem the invention aims to solve

[0007] To address the aforementioned problems, the composite filter element of one embodiment of the present invention aims to not only enable raw water intake and purified water output, but also to enable washing water discharge. By integrating the filter element components into a single composite filter element, user convenience is improved. Furthermore, a first partition wall and a second partition wall are provided in the head component of the outer casing to form independent flow paths where raw water, purified water, and washing water do not mix. This concentrates the flow channels of raw water, purified water, and washing water in the upper part of the composite filter element, thereby increasing the freedom of layout design for other parts. In the filtration section, the second filter element component is arranged to surround the first filter element component via a first top cover component, a second top cover component, and a third top cover component. The composite filter element is manufactured using the pre-manufactured first filter element component, thereby improving manufacturability.

[0008] The purpose of the composite filter element in one embodiment of the present invention is to improve structural stability by providing a lower cover component that is combined with the lower side of the second filter element component in the filtration section, forming a flow path for the first purified water to move to the second filter element component, so that the second purified water that is finally discharged moves in the upward direction, thereby improving the manufacturability of the composite filter element.

[0009] The purpose of the composite filter element in one embodiment of the present invention is to form a plurality of discharge holes on the side of the first filter element component. The washing water used to wash the first filter element component flows through the plurality of discharge holes through the first discharge channel formed between the first filter element component and the main body component and moves to the washing water discharge port. Thus, the washing water will not mix with the raw water or the purified water and moves through an independent flow path, thereby improving user satisfaction by improving the water quality of the purified water.

[0010] The purpose of the composite filter element in one embodiment of the present invention is to form a first O-ring between the first filter element component and the first upper cover component. The first O-ring is used to prevent washing water from flowing back into the first filter element component, thereby allowing the washing water to be stably discharged to the outside, thus increasing the service life of the first filter element component.

[0011] The purpose of the composite filter element in one embodiment of the present invention is to form a second O-ring between the second filter element component and the main body component. The second O-ring is used to prevent the first purified water from moving to the second discharge channel. As a result, the first purified water can be stably moved to the second filter element component, thereby improving the operational reliability of the composite filter element.

[0012] The purpose of the composite filter element in one embodiment of the present invention is to form a first spacer between the main body component and the first upper cover component, thereby allowing the washing water to move smoothly between the main body component and the first upper cover component, thus improving the operational reliability of the composite filter element.

[0013] The purpose of the composite filter element in one embodiment of the present invention is to form a second spacer between the second upper cover component and the third upper cover component, thereby allowing purified water to move smoothly between the second upper cover component and the third upper cover component, thus improving the operational reliability of the composite filter element.

[0014] The purpose of the composite filter element in one embodiment of the present invention is that raw water flows into the first filter element component through the first upward guide, thereby concentrating the channels for the flow of raw water, purified water and washing water in the upper part of the composite filter element, and preventing the raw water from mixing with purified water or washing water, thereby improving the operational reliability of the composite filter element.

[0015] The purpose of the composite filter element in one embodiment of the present invention is that the first partition wall is arranged to extend along the first upward guide in the axial direction, thereby effectively preventing the raw water entering the water from mixing with the washing water exiting the water, thereby improving user satisfaction by improving the water quality of the final purified water.

[0016] The purpose of the composite filter element in one embodiment of the present invention is to discharge the washing water flowing through the first filter element component to the outside through the second upward guide, thereby stably discharging the washing water and improving the operational stability of the composite filter element.

[0017] The purpose of the composite filter element in one embodiment of the present invention is that the second partition wall is arranged to extend along the second upward guide in the axial direction, thereby effectively preventing the purified water from mixing with the discharged washing water, thereby improving user satisfaction by improving the quality of the purified water.

[0018] The purpose of a water purifier according to an embodiment of the present invention is to selectively supply raw water and washing water to the composite filter element, thereby preventing the final purified water from mixing with the washing water, and washing the composite filter element with the washing water, thereby increasing the product life of the composite filter element and improving user satisfaction.

[0019] The purpose of a water purifier according to an embodiment of the present invention is that the washing module uses raw water supplied by the raw water supply unit as washing water, thereby eliminating the need to supply additional fluid for washing water to the washing module, thus improving the manufacturability of the water purifier.

[0020] The purpose of a water purifier according to an embodiment of the present invention is to improve the washing efficiency of the composite filter element by using purified water as washing water in the washing module.

[0021] To address the aforementioned problems, the composite filter element of another embodiment of the present invention aims to not only enable raw water inlet and purified water outlet, but also wash water discharge. By integrating the filter element components into a single composite filter element, user convenience is improved. Furthermore, a first partition wall and a second partition wall are provided in the head component of the outer shell to form independent flow paths where raw water, purified water, and wash water do not mix. This concentrates the flow channels of raw water, purified water, and wash water in the upper part of the composite filter element, thereby increasing the freedom of layout design for other parts. In the filtration section, the first to fifth upper cover components are positioned above the first and second filter element components, and the composite filter element is manufactured using the already manufactured first filter element component, thereby improving manufacturability.

[0022] The purpose of another embodiment of the composite filter element of the present invention is to improve structural stability by providing a lower cover component that is combined with the lower side of the second filter element component in the filtration section, forming a flow path for the first purified water to move to the second filter element component, so that the second purified water that is finally discharged moves in the upward direction, thereby improving the manufacturability of the composite filter element.

[0023] The purpose of the composite filter element in another embodiment of the present invention is that the first purified water flowing through the first filter element component flows into the second filter element component through the first upward guide. Thus, even if the second filter element component is stacked on top of the first filter element component, the channels for the flow of raw water, purified water and washing water are concentrated in the upper part of the composite filter element, thereby improving the ease of use of the composite filter element.

[0024] The purpose of the composite filter element in another embodiment of the present invention is that the washing water flowing through the first filter element moves through the second upward guide, thereby preventing the washing water from mixing with the purified water, thus improving the operational reliability of the composite filter element.

[0025] The purpose of another embodiment of the composite filter element is that the upper cover guide of the third upper cover component is combined with the second filter element component, thereby the second filter element component is stably disposed on the upper part of the first filter element component and stably ensures the channel for moving the second purified water, thereby improving the operational reliability of the composite filter element.

[0026] The purpose of the composite filter element in another embodiment of the present invention is that the purified water flowing through the second filter element moves through the fourth upward guide, thereby preventing the purified water from mixing with the washing water, thus improving the operational reliability of the composite filter element.

[0027] The purpose of the composite filter element in another embodiment of the present invention is that the washing water flowing through the first filter element is discharged to the outside through the fifth upward guide, thereby preventing the washing water from mixing with the raw water and thus improving the operational reliability of the composite filter element.

[0028] The purpose of the composite filter element in another embodiment of the present invention is to form a plurality of discharge holes on the side of the first filter element component. The washing water used to wash the first filter element component flows through the plurality of discharge holes through the first discharge channel formed between the first filter element component and the second upper cover component and moves to the washing water discharge port. Thus, the washing water will not mix with the raw water or the purified water and moves through an independent flow path, thereby improving user satisfaction by improving the water quality of the purified water.

[0029] The purpose of the composite filter element in another embodiment of the present invention is to form a first O-ring between the second upper cover component and the first filter element component. The first O-ring is used to prevent washing water from flowing back into the first filter element component, thereby allowing the washing water to be stably discharged to the outside, thereby increasing the service life of the first filter element component.

[0030] The purpose of the composite filter element in another embodiment of the present invention is to form a second O-ring between the second upper cover component and the fifth upper cover component. The second O-ring is used to prevent washing water from flowing back into the first filter element component, thereby preventing the washing water from mixing with the raw water and thus improving the operational reliability of the composite filter element.

[0031] The purpose of another embodiment of the composite filter element of the present invention is to form a third O-ring between the second upper cover component and the lower cover component. The third O-ring is used to prevent the second purified water filtered by the second filter element component from moving to the second discharge channel, thereby preventing the second purified water from mixing with the washing water and thus improving the operational reliability of the composite filter element.

[0032] The purpose of the composite filter element in another embodiment of the present invention is to form a fourth O-ring between the first upper cover component and the second upper cover component. The fourth O-ring is used to prevent the second purified water from flowing into the first discharge channel, thereby preventing the second purified water from mixing with the washing water, thereby improving the operational reliability of the composite filter element.

[0033] The purpose of another embodiment of the composite filter element of the present invention is to form a fifth O-ring between the lower cover component and the fourth upper cover component. The fifth O-ring is used to prevent the second purified water from flowing into the second discharge channel, thereby preventing the second purified water from mixing with the washing water, thereby improving the operational reliability of the composite filter element.

[0034] The purpose of another embodiment of the composite filter element is to form a first spacer between the fourth upper cover component and the fifth upper cover component, thereby allowing the washing water to move smoothly to the upper part through the space between the fourth upper cover component and the fifth upper cover component, thereby improving the operational reliability of the composite filter element.

[0035] The purpose of another embodiment of the composite filter element of the present invention is to form a second spacer between the fifth upper cover component and the housing component, thereby allowing raw water to flow smoothly through the space between the fifth upper cover component and the housing component to the lower part, forming a structure in which the first filter element component and the second filter element component are stacked. Furthermore, the channels for the flow of raw water, purified water and washing water are concentrated in the upper part of the composite filter element, thereby improving the ease of use of the composite filter element.

[0036] The purpose of another embodiment of the water purifier of the present invention is to selectively supply raw water and washing water to the composite filter element, thereby preventing the final purified water from mixing with the washing water, and washing the composite filter element with the washing water, thereby increasing the product life of the composite filter element and improving user satisfaction.

[0037] The purpose of another embodiment of the water purifier of the present invention is that the washing module uses the raw water supplied by the raw water supply unit as washing water, thereby eliminating the need to supply additional fluid for washing water to the washing module, thus improving the manufacturability of the water purifier.

[0038] The purpose of another embodiment of the water purifier of the present invention is that the washing module uses purified water as washing water, thereby improving the washing efficiency of the composite filter element.

[0039] To address the aforementioned issues, another embodiment of the composite filter element of the present invention aims to enable not only raw water intake and purified water output, but also washing water discharge. By integrating the filter element components into a single composite filter element, user convenience is improved. Furthermore, a first and second partition wall are provided in the head component of the outer casing to create independent flow paths where raw water, purified water, and washing water do not mix. This concentrates the flow channels of raw water, purified water, and washing water in the upper part of the composite filter element, thereby increasing the freedom of layout design for other components. In the filtration section, the first and second filter element components are arranged in a stacked structure using a first main body component, a first upper cover component, a second upper cover component, a first lower cover component, and a third upper cover component. The composite filter element is manufactured using the pre-manufactured first filter element component, thereby improving manufacturability.

[0040] The purpose of another embodiment of the composite filter element is to improve structural stability by providing a second lower cover component that is combined with the lower side of the second filter element component in the filtration section, forming a flow path for the first purified water to move to the second filter element component, so that the second purified water that is finally discharged moves in the upward direction, thereby improving the manufacturability of the composite filter element.

[0041] The purpose of the composite filter element in another embodiment of the present invention is that raw water flows into the first filter element component through the first upward guide, thereby concentrating the channels for the flow of raw water, purified water and washing water in the upper part of the composite filter element, and preventing the raw water from mixing with purified water or washing water, thereby improving the operational reliability of the composite filter element.

[0042] The purpose of the composite filter element in another embodiment of the present invention is to discharge the washing water flowing through the first filter element component to the outside through the second upward guide, thereby stably discharging the washing water and improving the operational stability of the composite filter element.

[0043] The purpose of another embodiment of the composite filter element is that the first purified water flowing through the first filter element component moves to the lower side of the second filter element component through the first lower cover guide. Thus, even if the first filter element component and the second filter element component have a stacked structure, the first purified water can move smoothly to the second filter element component, thereby improving the operational reliability of the composite filter element.

[0044] The purpose of another embodiment of the composite filter element is that the upper cover guide of the third upper cover component is combined with the second filter element component, thereby stably ensuring the channel for the movement of the second purified water between the first filter element component and the second filter element component, thereby improving the operational stability of the composite filter element.

[0045] The purpose of the composite filter element in another embodiment of the present invention is to form a plurality of discharge holes on the side of the first filter element component. The washing water used to wash the first filter element component flows through the plurality of discharge holes through the first discharge channel formed between the first filter element component and the first main body component and moves to the washing water discharge port. Thus, the washing water will not mix with the raw water or the purified water and moves through an independent flow path, thereby improving user satisfaction by improving the water quality of the purified water.

[0046] The purpose of the composite filter element in another embodiment of the present invention is to form a first O-ring between the first upper cover component and the first filter element component. The first O-ring is used to prevent washing water from flowing back into the first filter element component, thereby allowing the washing water to be stably discharged to the outside, thereby increasing the service life of the first filter element component.

[0047] The purpose of another embodiment of the composite filter element is to form a second O-ring between the second upper cover component and the first main body component. The second O-ring is used to prevent the washing water from mixing with the second purified water, thereby improving the operational reliability of the composite filter element.

[0048] The purpose of the composite filter element in another embodiment of the present invention is to form a third O-ring between the first filter element component and the first lower cover component. The third O-ring is used to prevent washing water from flowing into the second filter element component, thereby preventing the washing water from mixing with the first purified water, thereby improving user satisfaction by ensuring the quality of purified water.

[0049] The purpose of another embodiment of the composite filter element is to form a fourth O-ring between the first main body component and the first lower cover component. The fourth O-ring is used to prevent the washing water from mixing with the second purified water, thereby improving the operational reliability of the composite filter element.

[0050] The purpose of another embodiment of the composite filter element is to form a fifth O-ring between the second main body component and the third upper cover component. The fifth O-ring is used to prevent the second purified water from flowing back into the second filter element component, thereby allowing the second purified water to move smoothly to the upper part, thereby improving the operational stability of the composite filter element.

[0051] The purpose of another embodiment of the composite filter element is to form a first spacer between the first upper cover component and the first main body component, thereby allowing washing water to move smoothly to the upper part through the space between the first upper cover component and the second upper cover component, thereby improving the operational reliability of the composite filter element.

[0052] The purpose of another embodiment of the composite filter element is to form a second spacer between the second upper cover component and the housing component, thereby allowing purified water to move smoothly between the second upper cover component and the housing component, thus improving the operational reliability of the composite filter element.

[0053] The purpose of another embodiment of the water purifier of the present invention is to selectively supply raw water and washing water to the composite filter element, thereby preventing the final purified water from mixing with the washing water, and washing the composite filter element with the washing water, thereby increasing the product life of the composite filter element and improving user satisfaction.

[0054] The purpose of another embodiment of the water purifier of the present invention is that the washing module uses the raw water supplied by the raw water supply unit as washing water, thereby eliminating the need to supply additional fluid for washing water to the washing module, thus improving the manufacturability of the water purifier.

[0055] The purpose of another embodiment of the water purifier of the present invention is that the washing module uses purified water as washing water, thereby improving the washing efficiency of the composite filter element.

[0056] The problems of this invention are not limited to those mentioned above, and those skilled in the art can clearly understand other problems not mentioned from the following description.

[0057] means for solving problems

[0058] To achieve the above objectives, a composite filter element according to an embodiment of the present invention is characterized by comprising: a housing portion having a raw water inlet port, a purified water outlet port, and a washing water outlet port, wherein the raw water inlet port is used to allow raw water to enter, the purified water outlet port is used to allow filtered purified water to exit, and the washing water outlet port is used to discharge washing water; and a filtration portion having a first filter element component and a second filter element component, wherein the first filter element component generates first purified water by filtering the raw water, and the second filter element component generates second purified water by filtering the first purified water, and is configured to surround the first filter element component; the housing portion includes: a head component having a first partition wall and a second partition wall, wherein the first partition wall... The wall is used to prevent the raw water from mixing with the washing water, and the second partition wall is used to prevent the second purified water from mixing with the washing water; and a housing component extends from the head component and has the filter section disposed inside, the filter section including: a main body component disposed between the first filter element component and the second filter element component; a first top cover component with the first filter element component disposed on its lower side, the first filter element component being disposed inside the main body component; a second top cover component with the first top cover component disposed on its lower side; and a third top cover component with the second filter element component disposed on its lower side and above the second top cover component, the second filter element component being disposed on the outer side of the main body component.

[0059] The composite filter element of an embodiment of the present invention is characterized in that, after the washing water washes the first filter element component, it flows through the first discharge channel formed between the first filter element component and the main body component, and moves to the washing water discharge port.

[0060] The composite filter element of one embodiment of the present invention is characterized in that the above-mentioned filtration part further includes a lower cover component that is combined with the lower side of the above-mentioned second filter element component.

[0061] The composite filter element of one embodiment of the present invention is characterized in that the lower cover component includes a support guide that extends upward in combination with the second filter element component.

[0062] The composite filter element of one embodiment of the present invention is characterized in that a plurality of discharge holes are formed on the side of the first filter element component and are connected to the first discharge channel, and the washing water for washing the first filter element component moves to the first discharge channel through the plurality of discharge holes.

[0063] The composite filter element of an embodiment of the present invention is characterized in that a second discharge channel is formed between the first upper cover component and the second upper cover component, which is connected to the first discharge channel, and the second discharge channel is connected to the washing water discharge port.

[0064] The composite filter element of one embodiment of the present invention is characterized in that a first O-ring is formed between the first filter element component and the first upper cover component, and the first O-ring is used to prevent the washing water from flowing back into the first filter element component.

[0065] The composite filter element of one embodiment of the present invention is characterized in that a second O-ring is formed between the second upper cover component and the main body component, and the second O-ring is used to prevent the second purified water filtered by the second filter element component from moving to the second discharge channel.

[0066] The composite filter element of one embodiment of the present invention is characterized in that a third O-ring is formed between the third upper cover component and the housing component, and the third O-ring is used to prevent the second purified water filtered by the second filter element component from flowing back into the second filter element component.

[0067] The composite filter element of one embodiment of the present invention is characterized in that a first spacer is formed between the main body component and the first upper cover component to separate them by a certain distance.

[0068] The composite filter element of one embodiment of the present invention is characterized in that a second spacer is formed between the second upper cover component and the third upper cover component to separate them by a certain distance.

[0069] The composite filter element of one embodiment of the present invention is characterized in that the first upper cover component includes a first upward guide member that extends upward, so that the raw water flows into the first filter element component.

[0070] The composite filter element of one embodiment of the present invention is characterized in that the first partition wall is arranged to extend along the first upward guide in the axial direction.

[0071] The composite filter element of one embodiment of the present invention is characterized in that the second upper cover component includes a second upward guide member that extends upward in such a way as to discharge the washing water flowing through the first filter element component to the outside.

[0072] The composite filter element of one embodiment of the present invention is characterized in that the second partition wall extends along the second upward guide in an axial direction.

[0073] A water purifier according to an embodiment of the present invention is characterized by comprising: a raw water supply unit that controls the supply of raw water; a composite filter element that receives raw water from the raw water supply unit and filters it; a purified water discharge unit that controls the discharge of purified water filtered by the composite filter element; and a washing module disposed between the raw water supply unit and the composite filter element, which controls the supply of washing water to the composite filter element, wherein the raw water and the washing water are selectively supplied to the composite filter element.

[0074] The water purifier according to an embodiment of the present invention is characterized in that the composite filter element includes a filtration section having a first filter element component and a second filter element component. The first filter element component generates first purified water by filtering the raw water, and the second filter element component generates second purified water by filtering the first purified water. The filter element component is configured to surround the first filter element component. The filtration section includes: a main body component disposed between the first filter element component and the second filter element component; a first upper cover component having the first filter element component disposed on its lower side, the first filter element component being disposed inside the main body component; a second upper cover component having the first upper cover component disposed on its lower side; and a third upper cover component having the second filter element component disposed on its lower side and above the second upper cover component, the second filter element component being disposed outside the main body component.

[0075] The water purifier according to an embodiment of the present invention is characterized in that the composite filter element further includes a housing portion having a raw water inlet port, a purified water outlet port, and a washing water outlet port. The raw water inlet port is used to allow raw water to enter, the purified water outlet port is used to allow filtered purified water to exit, and the washing water outlet port is used to discharge washing water. The housing portion includes: a head component having a first partition wall and a second partition wall, the first partition wall being used to prevent the raw water from mixing with the washing water, and the second partition wall being used to prevent the second purified water from mixing with the washing water; and a shell component extending from the head component, having the filter portion disposed inside.

[0076] The water purifier according to an embodiment of the present invention is characterized in that the washing module uses raw water supplied from the raw water supply unit to wash the composite filter element.

[0077] The water purifier according to one embodiment of the present invention is characterized in that it further includes a purified water storage tank, which is connected to the purified water discharge section and receives the purified water filtered by the composite filter element. The washing module uses the purified water supplied from the purified water storage tank to wash the composite filter element.

[0078] A composite filter element according to another embodiment of the present invention is characterized by comprising: a housing portion having a raw water inlet port, a purified water outlet port, and a washing water outlet port, wherein the raw water inlet port is used to allow raw water to enter, the purified water outlet port is used to allow filtered purified water to exit, and the washing water outlet port is used to discharge washing water; and a filtration portion having a first filter element component and a second filter element component, wherein the first filter element component generates first purified water by filtering the raw water, and the second filter element component generates second purified water by filtering the first purified water, and is stacked on top of the first filter element component; the housing portion includes: a head component having a first partition wall and a second partition wall. The body includes a first partition wall for preventing the second purified water from mixing with the washing water, and a second partition wall for preventing the raw water from mixing with the washing water; and a housing component extending from the head component, which internally houses the filter section, the filter section comprising: a first top cover component with the first filter element component disposed on its lower side; a second top cover component with the first top cover component disposed on its lower side and having holes for allowing the washing water to move; a third top cover component with the second filter element component disposed on its lower side; a fourth top cover component with the third top cover component disposed on its lower side; and a fifth top cover component with the fourth top cover component disposed on its lower side.

[0079] A composite filter element according to another embodiment of the present invention is characterized in that the above-mentioned filtration part further includes a lower cover component that is combined with the lower side of the second filter element component.

[0080] A composite filter element according to another embodiment of the present invention is characterized in that the lower cover component includes a lower cover guide that extends upward in combination with the second filter element component.

[0081] A composite filter element according to another embodiment of the present invention is characterized in that the first upper cover component includes a first upward guide member that extends upward in a manner that allows the first purified water to flow into the second filter element component.

[0082] A composite filter element according to another embodiment of the present invention is characterized in that the second upper cover component includes a second upward guide member that extends upward in a manner that allows the washing water to be discharged from the first filter element component.

[0083] A composite filter element according to another embodiment of the present invention is characterized in that the third upper cover component includes an upper cover guide that extends downward in combination with the second filter element component.

[0084] A composite filter element according to another embodiment of the present invention is characterized in that the fourth upper cover component includes a fourth upward guide member that extends upward in a manner that allows the second purified water to be discharged from the second filter element component to the outside.

[0085] A composite filter element according to another embodiment of the present invention is characterized in that the fifth upper cover component includes a fifth upward guide member that extends upward in a manner that allows the washing water to be discharged to the outside.

[0086] The composite filter element of another embodiment of the present invention is characterized in that, after the washing water washes the first filter element component, it flows through the first discharge channel formed between the first filter element component and the second upper cover component, and moves to the washing water discharge port.

[0087] The composite filter element of another embodiment of the present invention is characterized in that a plurality of discharge holes are formed on the side of the first filter element component, which are connected to the first discharge channel, and the washing water for washing the first filter element component moves to the first discharge channel through the plurality of discharge holes.

[0088] The composite filter element of another embodiment of the present invention is characterized in that a second discharge channel is formed between the fourth upper cover component and the fifth upper cover component, which is connected to the first discharge channel, and the second discharge channel is connected to the washing water discharge port.

[0089] The composite filter element of another embodiment of the present invention is characterized in that a first O-ring is formed between the second upper cover component and the first filter element component, and the first O-ring is used to prevent the washing water from flowing back into the first filter element component.

[0090] The composite filter element of another embodiment of the present invention is characterized in that a second O-ring is formed between the second upper cover component and the fifth upper cover component, the second O-ring being used to prevent the washing water from flowing back into the first filter element component.

[0091] A composite filter element according to another embodiment of the present invention is characterized in that a third O-ring is formed between the second upper cover component and the lower cover component, the third O-ring being used to prevent the second purified water filtered by the second filter element component from moving to the second discharge channel.

[0092] The composite filter element of another embodiment of the present invention is characterized in that a fourth O-ring is formed between the first upper cover component and the second upper cover component, the fourth O-ring being used to prevent the second purified water from flowing into the first discharge channel.

[0093] The composite filter element of another embodiment of the present invention is characterized in that a fifth O-ring is formed between the lower cover component and the fourth upper cover component, the fifth O-ring being used to prevent the second purified water from flowing into the second discharge channel.

[0094] The composite filter element of another embodiment of the present invention is characterized in that a first spacer is formed between the fourth upper cover component and the fifth upper cover component to separate them by a certain distance.

[0095] A composite filter element according to another embodiment of the present invention is characterized in that a second spacer is formed between the fifth upper cover component and the housing component to separate them by a certain distance.

[0096] A water purifier according to another embodiment of the present invention is characterized by comprising: a raw water supply unit for controlling the supply of raw water; a composite filter element for receiving raw water from the raw water supply unit for filtration; a purified water discharge unit for controlling the discharge of purified water filtered by the composite filter element; and a washing module disposed between the raw water supply unit and the composite filter element, and controlling the supply of washing water to the composite filter element. The composite filter element includes a filtration unit having a first filter element component and a second filter element component. The first filter element component generates first purified water by filtering the raw water, and the second filter element component... The first purified water is filtered to generate the second purified water, and the filter is stacked on top of the first filter element. The filter includes: a first top cover element on which the first filter element is disposed below; a second top cover element on which the first top cover element is disposed below and has holes for moving the washing water; a third top cover element on which the second filter element is disposed below; a fourth top cover element on which the third top cover element is disposed below; and a fifth top cover element on which the fourth top cover element is disposed below. The raw water and the washing water are selectively supplied to the composite filter element.

[0097] A water purifier according to another embodiment of the present invention is characterized in that the composite filter element further includes a housing portion having a raw water inlet port, a purified water outlet port, and a washing water outlet port. The raw water inlet port is used to allow raw water to enter, the purified water outlet port is used to allow filtered purified water to exit, and the washing water outlet port is used to discharge washing water. The housing portion includes: a head component having a first partition wall and a second partition wall, the first partition wall being used to prevent the second purified water from mixing with the washing water, and the second partition wall being used to prevent the raw water from mixing with the washing water; and a shell component extending from the head component, having the filter portion disposed inside.

[0098] A water purifier according to another embodiment of the present invention is characterized in that the washing module uses raw water supplied from the raw water supply unit to wash the composite filter element.

[0099] The water purifier according to another embodiment of the present invention is characterized in that it includes a purified water storage tank connected to the purified water discharge section and receiving a supply of purified water filtered by the composite filter element, wherein the washing module uses the purified water supplied from the purified water storage tank to wash the composite filter element.

[0100] Another embodiment of the composite filter element of the present invention is characterized by comprising: a housing portion having a raw water inlet port, a purified water outlet port, and a washing water outlet port, wherein the raw water inlet port is used to allow raw water to enter, the purified water outlet port is used to allow filtered purified water to exit, and the washing water outlet port is used to discharge washing water; and a filtration portion having a first filter element component and a second filter element component, wherein the first filter element component generates first purified water by filtering the raw water, and the second filter element component generates second purified water by filtering the first purified water, and is stacked on the lower part of the first filter element component; the housing portion includes: a head component having a first partition wall and a second partition wall, wherein the first partition wall is used for... To prevent the raw water from mixing with the washing water, the second partition wall is used to prevent the purified water from mixing with the washing water; and a housing component extending from the head component, which internally houses the filter section, the filter section comprising: a first main body component surrounding the first filter element component; a first upper cover component with the first filter element component disposed below it; a second upper cover component with the first upper cover component disposed below it and the first main body component disposed below it; a first lower cover component with the first filter element component disposed above it and penetrating the second filter element component; a second main body component surrounding the second filter element component; and a third upper cover component with the second filter element component disposed below it.

[0101] Another embodiment of the composite filter element of the present invention is characterized in that the above-mentioned filtration part further includes a second lower cover component that is combined with the lower side of the second filter element component.

[0102] Another embodiment of the composite filter element of the present invention is characterized in that the second lower cover component includes a second lower cover guide that extends upward in combination with the second filter element component.

[0103] Another embodiment of the composite filter element of the present invention is characterized in that the first upper cover component includes a first upward guide member that extends upward in such a way as to allow the raw water to flow into the second filter element component.

[0104] Another embodiment of the composite filter element of the present invention is characterized in that the second upper cover component includes a second upward guide member that extends upward in a manner that allows the washing water to be discharged from the first filter element component.

[0105] Another embodiment of the composite filter element of the present invention is characterized in that the first lower cover component includes a first lower cover guide that extends downwardly through the second filter element component.

[0106] Another embodiment of the composite filter element of the present invention is characterized in that the third upper cover component includes an upper cover guide that extends downward in combination with the second filter element component.

[0107] The composite filter element of another embodiment of the present invention is characterized in that, after the washing water washes the first filter element component, it flows through the first discharge channel formed between the first filter element component and the first main body component, and moves to the washing water discharge port.

[0108] The composite filter element of another embodiment of the present invention is characterized in that a plurality of discharge holes are formed on the side of the first filter element component and are connected to the first discharge channel, and the washing water for washing the first filter element component moves to the first discharge channel through the plurality of discharge holes.

[0109] Another embodiment of the composite filter element of the present invention is characterized in that a second discharge channel is formed between the first upper cover component and the second upper cover component, which is connected to the first discharge channel, and the second discharge channel is connected to the washing water discharge port.

[0110] Another embodiment of the composite filter element of the present invention is characterized in that a first O-ring is formed between the first upper cover component and the first filter element component, the first O-ring being used to prevent the washing water from flowing back into the first filter element component.

[0111] Another embodiment of the composite filter element of the present invention is characterized in that a second O-ring is formed between the second upper cover component and the first main body component, the second O-ring being used to prevent the washing water from mixing with the second purified water.

[0112] Another embodiment of the composite filter element of the present invention is characterized in that a third O-ring is formed between the first filter element component and the first lower cover component, the third O-ring being used to prevent the washing water from flowing into the second filter element component.

[0113] Another embodiment of the composite filter element of the present invention is characterized in that a fourth O-ring is formed between the first main body component and the first lower cover component, the fourth O-ring being used to prevent the washing water from mixing with the second purified water.

[0114] Another embodiment of the composite filter element of the present invention is characterized in that a fifth O-ring is formed between the second main body component and the third upper cover component, the fifth O-ring being used to prevent the second purified water from flowing back into the second filter element component.

[0115] Another embodiment of the composite filter element of the present invention is characterized in that a first spacer is formed between the first upper cover component and the first main body component to separate them by a certain distance.

[0116] The composite filter element of another embodiment of the present invention is characterized in that a second spacer is formed between the second upper cover component and the housing component to separate them by a certain distance.

[0117] Another embodiment of the water purifier of the present invention is characterized by comprising: a raw water supply unit for controlling the supply of raw water; a composite filter element for receiving raw water from the raw water supply unit for filtration; a purified water discharge unit for controlling the discharge of purified water filtered by the composite filter element; and a washing module disposed between the raw water supply unit and the composite filter element, and controlling the supply of washing water to the composite filter element, wherein the composite filter element includes a filtration unit provided with a first filter element component and a second filter element component, the first filter element component generating first purified water by filtering the raw water, and the second filter element component generating second purified water by filtering the first purified water. The filter element comprises: a first main body component surrounding the first filter element component; a first upper cover component with the first filter element component disposed on its lower side; a second upper cover component with the first upper cover component disposed on its lower side and the first main body component disposed on its lower side; a first lower cover component with the first filter element component disposed on its upper side and penetrating the second filter element component; a second main body component surrounding the second filter element component; and a third upper cover component with the second filter element component disposed on its lower side. The raw water and the washing water are selectively supplied to the composite filter element.

[0118] Another embodiment of the water purifier of the present invention is characterized in that the composite filter element further includes a housing portion having a raw water inlet port, a purified water outlet port, and a washing water outlet port. The raw water inlet port is used to allow raw water to enter, the purified water outlet port is used to allow filtered purified water to exit, and the washing water outlet port is used to discharge washing water. The housing portion includes: a head component having a first partition wall and a second partition wall, the first partition wall being used to prevent the raw water from mixing with the washing water, and the second partition wall being used to prevent the purified water from mixing with the washing water; and a shell component extending from the head component, having the filter portion disposed inside.

[0119] Another embodiment of the water purifier of the present invention is characterized in that the washing module uses raw water supplied from the raw water supply unit to wash the composite filter element.

[0120] Another embodiment of the water purifier of the present invention is characterized in that it further includes a purified water storage tank, which is connected to the purified water discharge section and receives the purified water filtered by the composite filter element, and the washing module uses the purified water supplied from the purified water storage tank to wash the composite filter element.

[0121] Invention Effects

[0122] According to the above configuration, the composite filter element of an embodiment of the present invention provides the following effects: it can not only realize the intake of raw water and the output of purified water, but also the discharge of washing water. Thus, by integrating the filter element components to form a composite filter element, the convenience of the user is improved. Furthermore, a first partition wall and a second partition wall are provided in the head component of the outer shell to form independent flow paths for raw water, purified water and washing water to prevent them from mixing. This concentrates the flow channels of raw water, purified water and washing water in the upper part of the composite filter element, thereby increasing the freedom of layout design of other parts. In addition, in the filtration section, the second filter element component is arranged to surround the first filter element component by the first upper cover component, the second upper cover component and the third upper cover component, and the composite filter element is manufactured using the already manufactured first filter element component, thereby improving manufacturability.

[0123] The composite filter element of one embodiment of the present invention provides the following effects: a lower cover component that is combined with the lower side of the second filter element component is provided in the filtration section to improve structural stability, form a flow path for the first purified water to move to the second filter element component, and make the second purified water that is finally discharged move in the upward direction, thereby improving the manufacturability of the composite filter element.

[0124] The composite filter element of one embodiment of the present invention provides the following effect: multiple discharge holes are formed on the side of the first filter element component, and the washing water used to wash the first filter element component flows through the multiple discharge holes through the first discharge channel formed between the first filter element component and the main body component, and moves to the washing water discharge port. Thus, the washing water will not mix with the raw water or the purified water, and moves through an independent flow path, thereby improving user satisfaction by improving the water quality of the purified water.

[0125] The composite filter element of one embodiment of the present invention provides the following effect: a first O-ring is formed between the first filter element component and the first top cover component. The first O-ring is used to prevent washing water from flowing back into the first filter element component. As a result, the washing water can be stably discharged to the outside, thereby increasing the service life of the first filter element component.

[0126] The composite filter element of one embodiment of the present invention provides the following effect: a second O-ring is formed between the second filter element component and the main body component. The second O-ring is used to prevent the first purified water from moving to the second discharge channel. As a result, the first purified water can be stably moved to the second filter element component, thereby improving the operational reliability of the composite filter element.

[0127] The composite filter element of one embodiment of the present invention provides the following effect: a first spacer is formed between the main body component and the first upper cover component, thereby allowing washing water to move smoothly between the main body component and the first upper cover component, thereby improving the operational reliability of the composite filter element.

[0128] The composite filter element of one embodiment of the present invention provides the following effect: a second spacer is formed between the second upper cover component and the third upper cover component, thereby allowing purified water to move smoothly between the second upper cover component and the third upper cover component, thereby improving the operational reliability of the composite filter element.

[0129] The composite filter element of one embodiment of the present invention provides the following effect: raw water flows into the first filter element component through the first upward guide, thereby concentrating the channels for the flow of raw water, purified water and washing water in the upper part of the composite filter element, and preventing the raw water from mixing with purified water or washing water, thereby improving the operational reliability of the composite filter element.

[0130] The composite filter element of one embodiment of the present invention provides the following effect: the first partition wall is arranged to extend along the first upward guide in the axial direction, thereby effectively preventing the raw water entering the water from mixing with the washing water exiting the water, thereby improving user satisfaction by improving the water quality of the final effluent purified water.

[0131] The composite filter element of one embodiment of the present invention provides the following effect: the washing water flowing through the first filter element component is discharged to the outside through the second upward guide, thereby stably discharging the washing water and improving the operational stability of the composite filter element.

[0132] The composite filter element of one embodiment of the present invention provides the following effect: the second partition wall is arranged to extend along the second upward guide in the axial direction, thereby effectively preventing the purified water from mixing with the discharged washing water, thereby improving user satisfaction by improving the water quality of the purified water.

[0133] The water purifier of one embodiment of the present invention provides the following effect: raw water and washing water are selectively supplied to the composite filter element, thereby preventing the final purified water from mixing with the washing water, and the composite filter element is washed by the washing water, thereby increasing the product life of the composite filter element and improving user satisfaction.

[0134] The water purifier of one embodiment of the present invention provides the following effect: the washing module uses the raw water supplied by the raw water supply unit as washing water, thereby eliminating the need to supply additional fluid for washing water to the washing module, thus improving the manufacturability of the water purifier.

[0135] The water purifier of one embodiment of the present invention provides the following effect: the washing module uses purified water as washing water, thereby improving the washing efficiency of the composite filter element.

[0136] The composite filter element of another embodiment of the present invention provides the following effects: it can not only realize the intake of raw water and the output of purified water, but also the discharge of washing water. Thus, by integrating the filter element components to form a composite filter element, the convenience of users is improved. Furthermore, a first partition wall and a second partition wall are provided in the head component of the outer shell to form independent flow paths for raw water, purified water and washing water to prevent them from mixing. This concentrates the flow channels of raw water, purified water and washing water in the upper part of the composite filter element, thereby increasing the freedom of layout design of other parts. In addition, in the filtration section, the first to fifth upper cover components are arranged on the upper part of the first filter element component and the second filter element component, and the composite filter element is manufactured using the already manufactured first filter element component, thereby improving manufacturability.

[0137] The composite filter element of another embodiment of the present invention provides the following effect: a lower cover component that is combined with the lower side of the second filter element component is provided in the filtration section to improve structural stability, form a flow path for the first purified water to move to the second filter element component, and make the second purified water that is finally discharged move in the upward direction, thereby improving the manufacturability of the composite filter element.

[0138] The composite filter element of another embodiment of the present invention provides the following effect: the first purified water flowing through the first filter element component flows into the second filter element component through the first upward guide. Thus, even if the second filter element component is stacked on top of the first filter element component, the channels for the flow of raw water, purified water and washing water are concentrated in the upper part of the composite filter element, thereby improving the ease of use of the composite filter element.

[0139] The composite filter element of another embodiment of the present invention provides the following effect: the washing water flowing through the first filter element moves through the second upward guide, thereby preventing the washing water from mixing with the purified water, thus improving the operational reliability of the composite filter element.

[0140] The composite filter element of another embodiment of the present invention provides the following effect: the upper cover guide of the third upper cover component is combined with the second filter element component, thereby the second filter element component is stably disposed on the upper part of the first filter element component and stably ensures the channel for moving the second purified water, thereby improving the operational reliability of the composite filter element.

[0141] The composite filter element of another embodiment of the present invention provides the following effect: the purified water flowing through the second filter element moves through the fourth upward guide, thereby preventing the purified water from mixing with the washing water, thus improving the operational reliability of the composite filter element.

[0142] The composite filter element of another embodiment of the present invention provides the following effect: the washing water flowing through the first filter element component is discharged to the outside through the fifth upward guide, thereby preventing the washing water from mixing with the raw water, thus improving the operational reliability of the composite filter element.

[0143] The composite filter element of another embodiment of the present invention provides the following effect: multiple discharge holes are formed on the side of the first filter element component, and the washing water used to wash the first filter element component flows through the multiple discharge holes through the first discharge channel formed between the first filter element component and the second top cover component, and moves to the washing water discharge port. Thus, the washing water will not mix with the raw water or the purified water, and moves through an independent flow path, thereby improving user satisfaction by improving the water quality of the purified water.

[0144] The composite filter element of another embodiment of the present invention provides the following effect: a first O-ring is formed between the second upper cover component and the first filter element component. The first O-ring is used to prevent washing water from flowing back into the first filter element component. As a result, the washing water can be stably discharged to the outside, thereby increasing the service life of the first filter element component.

[0145] The composite filter element of another embodiment of the present invention provides the following effect: a second O-ring is formed between the second upper cover component and the fifth upper cover component. The second O-ring is used to prevent washing water from flowing back into the first filter element component, thereby preventing the washing water from mixing with the raw water and thus improving the operational reliability of the composite filter element.

[0146] The composite filter element of another embodiment of the present invention provides the following effect: a third O-ring is formed between the second upper cover component and the lower cover component. The third O-ring is used to prevent the second purified water filtered by the second filter element component from moving to the second discharge channel, thereby preventing the second purified water from mixing with the washing water, thereby improving the operational reliability of the composite filter element.

[0147] The composite filter element of another embodiment of the present invention provides the following effect: a fourth O-ring is formed between the first upper cover component and the second upper cover component. The fourth O-ring is used to prevent the second purified water from flowing into the first discharge channel, thereby preventing the second purified water from mixing with the washing water, thereby improving the operational reliability of the composite filter element.

[0148] The composite filter element of another embodiment of the present invention provides the following effect: a fifth O-ring is formed between the lower cover component and the fourth upper cover component. The fifth O-ring is used to prevent the second purified water from flowing into the second discharge channel, thereby preventing the second purified water from mixing with the washing water, thereby improving the operational reliability of the composite filter element.

[0149] The composite filter element of another embodiment of the present invention provides the following effect: a first spacer is formed between the fourth upper cover component and the fifth upper cover component, thereby allowing washing water to move smoothly to the upper part through the space between the fourth upper cover component and the fifth upper cover component, thereby improving the operational reliability of the composite filter element.

[0150] The composite filter element of another embodiment of the present invention provides the following effects: a second spacer is formed between the fifth upper cover component and the housing component, thereby allowing raw water to move smoothly through the space between the fifth upper cover component and the housing component to the lower part, forming a structure in which the first filter element component and the second filter element component are stacked, and the channels for the flow of raw water, purified water and washing water are concentrated in the upper part of the composite filter element, thereby improving the ease of use of the composite filter element.

[0151] The water purifier of another embodiment of the present invention provides the following effect: raw water and washing water are selectively supplied to the composite filter element, thereby preventing the final purified water from mixing with the washing water, and the composite filter element is washed by the washing water, thereby increasing the product life of the composite filter element and improving user satisfaction.

[0152] Another embodiment of the water purifier of the present invention provides the following effect: the washing module uses the raw water supplied by the raw water supply unit as washing water, thereby eliminating the need to supply additional fluid for washing water to the washing module, thus improving the manufacturability of the water purifier.

[0153] Another embodiment of the water purifier of the present invention provides the following effect: the washing module uses purified water as washing water, thereby improving the washing efficiency of the composite filter element.

[0154] Another embodiment of the composite filter element of the present invention provides the following effects: it can not only realize the intake of raw water and the output of purified water, but also the discharge of washing water. Thus, by integrating the filter element components to form a composite filter element, the convenience of users is improved. Furthermore, a first partition wall and a second partition wall are provided in the head component of the outer shell to form independent flow paths for raw water, purified water and washing water to prevent them from mixing. This concentrates the flow channels of raw water, purified water and washing water in the upper part of the composite filter element, thereby increasing the freedom of layout design of other parts. In addition, in the filtration section, the first filter element component and the second filter element component are arranged in a stacked structure using a first main body component, a first upper cover component, a second upper cover component, a first lower cover component and a third upper cover component, and the composite filter element is manufactured using the manufactured first filter element component, thereby improving manufacturability.

[0155] Another embodiment of the composite filter element of the present invention provides the following effect: a second lower cover component is provided in the filtration section to be combined with the lower side of the second filter element component to improve structural stability, form a flow path for the first purified water to move to the second filter element component, so that the second purified water that is finally discharged moves in the upward direction, thereby improving the manufacturability of the composite filter element.

[0156] Another embodiment of the composite filter element of the present invention provides the following effect: raw water flows into the first filter element component through the first upward guide, thereby concentrating the channels for the flow of raw water, purified water and washing water in the upper part of the composite filter element, and preventing the raw water from mixing with purified water or washing water, thereby improving the operational reliability of the composite filter element.

[0157] The composite filter element of another embodiment of the present invention provides the following effect: the washing water flowing through the first filter element component is discharged to the outside through the second upward guide, thereby stably discharging the washing water and improving the operational stability of the composite filter element.

[0158] Another embodiment of the composite filter element of the present invention provides the following effect: the first purified water flowing through the first filter element component moves to the lower side of the second filter element component through the first lower cover guide. Thus, even if the first filter element component and the second filter element component have a stacked structure, the first purified water can move smoothly to the second filter element component, thereby improving the operational reliability of the composite filter element.

[0159] Another embodiment of the composite filter element of the present invention provides the following effect: the upper cover guide of the third upper cover component is combined with the second filter element component, thereby stabilizing and ensuring the channel for the movement of the second purified water between the first filter element component and the second filter element component, thereby improving the operational stability of the composite filter element.

[0160] Another embodiment of the composite filter element of the present invention provides the following effect: multiple discharge holes are formed on the side of the first filter element component, and the washing water used to wash the first filter element component flows through the multiple discharge holes through the first discharge channel formed between the first filter element component and the first main body component, and moves to the washing water discharge port. Thus, the washing water will not mix with the raw water or the purified water, and moves through an independent flow path, thereby improving user satisfaction by improving the water quality of the purified water.

[0161] The composite filter element of another embodiment of the present invention provides the following effect: a first O-ring is formed between the first upper cover component and the first filter element component. The first O-ring is used to prevent washing water from flowing back into the first filter element component. As a result, the washing water can be stably discharged to the outside, thereby increasing the service life of the first filter element component.

[0162] Another embodiment of the composite filter element of the present invention provides the following effect: a second O-ring is formed between the second upper cover component and the first main body component. The second O-ring is used to prevent the washing water from mixing with the second purified water, thereby improving the operational reliability of the composite filter element.

[0163] Another embodiment of the composite filter element of the present invention provides the following effect: a third O-ring is formed between the first filter element component and the first lower cover component. The third O-ring is used to prevent washing water from flowing into the second filter element component, thereby preventing the washing water from mixing with the first purified water, thereby improving user satisfaction by ensuring the quality of purified water.

[0164] Another embodiment of the composite filter element of the present invention provides the following effect: a fourth O-ring is formed between the first main body component and the first lower cover component. The fourth O-ring is used to prevent the washing water from mixing with the second purified water, thereby improving the operational reliability of the composite filter element.

[0165] Another embodiment of the composite filter element of the present invention provides the following effect: a fifth O-ring is formed between the second main body component and the third upper cover component. The fifth O-ring is used to prevent the second purified water from flowing back into the second filter element component, thereby allowing the second purified water to move smoothly to the upper part, thereby improving the operational stability of the composite filter element.

[0166] Another embodiment of the composite filter element of the present invention provides the following effect: a first spacer is formed between the first upper cover component and the first main body component, thereby allowing washing water to move smoothly to the upper part through the space between the first upper cover component and the second upper cover component, thereby improving the operational reliability of the composite filter element.

[0167] Another embodiment of the composite filter element of the present invention provides the following effect: a second spacer is formed between the second upper cover component and the housing component, thereby allowing purified water to move smoothly between the second upper cover component and the housing component, thereby improving the operational reliability of the composite filter element.

[0168] Another embodiment of the water purifier of the present invention provides the following effect: raw water and washing water are selectively supplied to the composite filter element, thereby preventing the final purified water from mixing with the washing water, and the composite filter element is washed by the washing water, thereby increasing the product life of the composite filter element and improving user satisfaction.

[0169] Another embodiment of the water purifier of the present invention provides the following effect: the washing module uses the raw water supplied by the raw water supply unit as washing water, thereby eliminating the need to supply additional fluid for washing water to the washing module, thus improving the manufacturability of the water purifier.

[0170] Another embodiment of the water purifier of the present invention provides the following effect: the washing module uses purified water as washing water, thereby improving the washing efficiency of the composite filter element. Attached Figure Description

[0171] Figure 1 The figure is shown to briefly illustrate the appearance of a composite filter element according to an embodiment of the present invention.

[0172] Figure 2This is a plan view of the head component of a composite filter element according to an embodiment of the present invention.

[0173] Figure 3 This is a cross-sectional view showing the assembled state of the filter section of a composite filter element according to an embodiment of the present invention.

[0174] Figure 4 This is a cross-sectional view showing the main body component, first upper cover component, second upper cover component, and third upper cover component of the composite filter element according to an embodiment of the present invention, separated from the lower cover component.

[0175] Figure 5 This is a cross-sectional view showing the state in which the filter portion of a composite filter element according to an embodiment of the present invention is disposed in the outer shell.

[0176] Figure 6 The following is a structural diagram of a water purifier according to an embodiment of the present invention.

[0177] Figure 7 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0178] Figure 8 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0179] Figure 9 The figure is shown to briefly illustrate the appearance of the composite filter element according to another embodiment of the present invention.

[0180] Figure 10 A plan view of the head component of a composite filter element according to another embodiment of the present invention is shown.

[0181] Figure 11 This is a cross-sectional view showing the assembled state of the filter section of a composite filter element according to another embodiment of the present invention.

[0182] Figure 12 A cross-sectional view showing the filtration section of a composite filter element according to another embodiment of the present invention in a separated state.

[0183] Figure 13 This is a cross-sectional view showing the state in which the filter portion of the composite filter element of another embodiment of the present invention is disposed in the outer shell.

[0184] Figure 14 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0185] Figure 15 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0186] Figure 16 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0187] Figure 17 A diagram illustrating the appearance of a composite filter element according to another embodiment of the present invention.

[0188] Figure 18 This is a plan view of the head component of a composite filter element according to another embodiment of the present invention.

[0189] Figure 19 This is a cross-sectional view showing the assembled state of the filter section of a composite filter element according to another embodiment of the present invention.

[0190] Figure 20 This is a cross-sectional view showing the state of the filter portion of a composite filter element according to another embodiment of the present invention.

[0191] Figure 21 This is a cross-sectional view showing the state in which the filter portion of the composite filter element according to another embodiment of the present invention is disposed in the outer shell.

[0192] Figure 22 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0193] Figure 23 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0194] Figure 24 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0195] Explanation of reference numerals in the attached figures

[0196] 10: Raw water inlet port; 20: Purified water outlet port

[0197] 30: Washing water outlet port; 100: Composite filter element

[0198] 110: Outer shell 111: Head assembly

[0199] 111a: First partition wall; 111b: Second partition wall

[0200] 112: Housing component 200: Filter section

[0201] 210: First filter element component; 220: Second filter element component

[0202] 230: Main body component; 240: First upper cover component

[0203] 250: Second upper cover component; 260: Third upper cover component

[0204] 500: Composite filter element; 510: Outer shell.

[0205] 511: Head assembly; 512: Housing assembly

[0206] 520: Raw water inlet port; 530: Purified water outlet port

[0207] 540: Washing water drain port; 511a: First partition wall.

[0208] 511b: Second partition wall; 600: Filter section

[0209] 610: First filter element component; 620: Second filter element component

[0210] 630: First upper cover component; 640: Second upper cover component

[0211] 650: Third upper cover component; 660: Fourth upper cover component

[0212] 670: Fifth upper cover component

[0213] 900: Composite filter element; 910: Housing part

[0214] 911: Head assembly; 912: Housing assembly

[0215] 920: Raw water inlet port; 930: Purified water outlet port

[0216] 940: Washing water drain port; 911a: First partition wall

[0217] 911b: Second partition wall; 1000: Filter section

[0218] 1010: First filter element component; 1020: Second filter element component

[0219] 1030: First main body component; 1040: First upper cover component

[0220] 1050: Second upper cover component; 1060: First lower cover component

[0221] 1070: Second main body component; 1080: Third upper cover component Detailed Implementation

[0222] Hereinafter, various embodiments are described in more detail with reference to the accompanying drawings. Various modifications can be made to the embodiments of the present invention. Specific embodiments are described in the accompanying drawings and are further described in detail in the detailed description. However, the specific embodiments disclosed in the drawings are only for ease of understanding of various embodiments. Therefore, it should be understood that the technical concept is not limited to the specific embodiments disclosed in the accompanying drawings, but includes all equivalent or alternative technical solutions included in the inventive concept and technical scope.

[0223] Terms including ordinal numbers such as first and second are used to describe multiple constituent elements, but such constituent elements are not limited to the terms mentioned above. The terms mentioned above are only used to distinguish one constituent element from another.

[0224] In embodiments of the present invention, it should be understood that the terms "comprising" or "having," etc., are used to describe the presence of features, numbers, steps, actions, constituent elements, components, or combinations thereof described in the embodiments of the present invention, and do not preclude the existence or additional possibilities of one or more other features or numbers, steps, actions, constituent elements, components, or combinations thereof. When a constituent element is referred to as "connected" or "linked" to another constituent element, it should be understood that it can be directly connected or linked to the other constituent element, and that other constituent elements may exist in between. Conversely, when a constituent element is referred to as "directly linked" or "directly connected" to another constituent element, it should be understood that no other constituent elements exist in between.

[0225] Furthermore, the "module" or "part" of the constituent elements used in the embodiments of the present invention performs at least one function or action. Moreover, a "module" or "part" can perform functions or actions via hardware, software, or a combination of hardware and software. Furthermore, multiple "modules" or multiple "parts," other than those that should be executed in specific hardware or in at least one processor, can be integrated into a single module. Unless otherwise defined in the context, singular expressions include plural expressions.

[0226] Furthermore, when describing embodiments of the present invention, detailed descriptions of such features or structures will be simplified or omitted if it is determined that such detailed descriptions would unnecessarily obscure the spirit of the invention.

[0227] Hereinafter, a composite filter element and a water purifier including the composite filter element according to an embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 The figure is provided to briefly illustrate the appearance of a composite filter element according to an embodiment of the present invention. Figure 2 To illustrate a plan view of the head component of a composite filter element according to an embodiment of the present invention, Figure 3 This is a cross-sectional view showing the assembled state of the filter section of a composite filter element according to an embodiment of the present invention. Here, 'a' refers to the axial direction of the composite filter element, and 'r' refers to the radial direction of the composite filter element.

[0228] like Figures 1 to 3As shown, the composite filter element 100 of the present invention includes: a housing portion 110, which is provided with a raw water inlet port 10, a purified water outlet port 20, and a washing water outlet port 30, wherein the raw water inlet port 10 is used to allow raw water W1 to enter, the purified water outlet port 20 is used to allow filtered purified water C to exit, and the washing water outlet port 30 is used to discharge washing water W2; and a filtration portion 200, which is provided with a first filter element component 210 and a second filter element component 220, wherein the first filter element component 210 generates first purified water C1 by filtering the raw water W1, and the second filter element component 220 generates second purified water C2 by filtering the first purified water C1, and is arranged to surround the first filter element component 210. That is, the raw water W1 entering through the raw water inlet port 10 moves to the filtration section 200, and then sequentially moves to the first filter element 210 and the second filter element 220 disposed in the filtration section 200 and is filtered. The finally filtered purified water C is then discharged through the purified water outlet port 20 and provided to the user. Furthermore, the purified water C can be stored in a separate purified water tank (not shown), or it can be supplied to a cold water generation section (not shown), a hot water generation section (not shown), and an ice generation section (not shown) for generating cold water, hot water, and ice. Moreover, after the first purified water C1 moves to the lower side of the first filter element 210, it moves to the second filter element 220. The washing water W2 washes the first filter element 210 and then moves to the first discharge channel PW2 formed between the first filter element 210 and the second filter element 220, and is discharged to the outside of the composite filter element 100 through the washing water discharge port 30. As described above, the filter element is configured to not only receive the raw water W1 and produce the purified water C, but also discharge the washing water W2. This can be achieved by integrating the first filter element 210 and the second filter element 220 into a composite filter element, thereby improving user convenience. The washing water W2 is used to wash the first filter element 210, increasing the product lifespan of the composite filter element 100 and further enhancing user convenience. In this case, the first filter element 210 can be an ultrafiltration (UF) filter element that filters pollutants through a hollow fiber membrane. Furthermore, the second filter element 220 can be an activated carbon filter element or a microfiltration (MF) filter element. Additionally, the second filter element 220 may also include an electroionization filter element. Electroionization refers to methods such as electrodeionization (EDI), continuous electrodeionization (CEDI), and capacitive deionization (CDI).At this time, a separate filter element can be provided on the outer surface of the second filter element 220. For example, this separate filter element can be an NT filter element. This NT filter element can be made of an electrostatically charged material, such as a nano-trap material, to adsorb foreign matter contained in the incoming raw water W1. This electrostatically charged material can be configured to carry a positive charge. Thus, negatively charged foreign matter contained in the raw water W1, such as viruses, bacteria, and fine particles, can be electrostatically adsorbed in the NT filter element. Furthermore, this separate filter element can also be a sediment filter element.

[0229] like Figure 2 As shown, in a composite filter element according to an embodiment of the present invention, the outer shell portion 110 includes: a head component 111, which is provided with a first partition wall 111a and a second partition wall 111b, wherein the first partition wall 111a is used to prevent the raw water W1 from mixing with the washing water W2, and the second partition wall 111b is used to prevent the second purified water C2 from mixing with the washing water W2; and a shell component 112, which extends from the head component 111 and has the filter portion 200 disposed inside it. That is, it is a structure for allowing the incoming raw water W1, the outgoing second purified water C2, and the discharged washing water W2 to be discharged / exported to the upper part of the composite filter element 100. For this purpose, a raw water region RW1 for allowing the raw water W1 to enter, a second purified water region RC2 for allowing the second purified water C2 to exit, and a washing water region RW2 for discharging the washing water W2 are formed in the head component 111. Therefore, the first partition wall 111a and the second partition wall 111b are provided in the head component 111 of the outer shell 110 to form an independent flow path that prevents the raw water W1, the second purified water C2, and the washing water W2 from mixing. This concentrates the water outlet / discharge at the upper part of the composite filter element 100, thereby increasing the flexibility of the layout design of other parts. The washing water W2 flowing into the first filter element component 210 uses the raw water W1 to wash the first filter element component 210. However, the washing water W2 is not limited to using only the raw water W1; it can also utilize the purified water from the outlet.

[0230] like Figure 3As shown, the filter unit 200 includes: a main body component 230 disposed between the first filter element component 210 and the second filter element component 220; a first upper cover component 240 on which the first filter element component 210 is disposed below, the first filter element component 210 being disposed inside the main body component 230; a second upper cover component 250 on which the first upper cover component 240 is disposed below; and a third upper cover component 260 on which the second filter element component 220 is disposed below, and above the second upper cover component 250, the second filter element component 220 being disposed outside the main body component 230. At this time, the raw water W1 moves through the inside of the first top cover component 240, the washing water W2 moves between the first top cover component 240 and the second top cover component 250, and the purified water C moves between the second top cover component 250 and the third top cover component 260. Thus, an independent flow path is formed that prevents the raw water W1, the washing water W2 and the purified water C from mixing, making the first filter element component 210 and the second filter element component 220 integrated, thereby improving manufacturability.

[0231] like Figure 3 As shown, a plurality of discharge holes 211 are formed on the lower side of the side of the first filter element 210, arranged spaced apart from each other. At this time, the plurality of discharge holes 211 are of the same size. However, the size of the plurality of discharge holes 211 is not limited to being the same; they may gradually increase or decrease in the downward direction. Furthermore, the plurality of discharge holes 211 are arranged at equal intervals. However, the plurality of discharge holes 211 are not limited to being arranged at equal intervals; they may also be arranged in a manner that moves away from each other in the downward direction. Moreover, a first discharge channel PW2 for allowing the washing water W2 to flow is provided between the first filter element 210 and the main body 230. At this time, the plurality of discharge holes 211 are connected to the first discharge channel PW2. Furthermore, the washing water W2 used to wash the first filter element 210 moves through the plurality of discharge holes 211 to the first discharge channel PW2. Furthermore, a second discharge channel AW2, which communicates with the first discharge channel PW2, is provided between the first upper cover component 240 and the second upper cover component 250. At this time, the second discharge channel AW2 communicates with the washing water discharge port 30 (see reference). Figure 2The washing water W2, which washes the first filter element 210, flows sequentially through the plurality of discharge holes 211, the first discharge channel PW2, the second discharge channel AW2, and the washing water discharge port 30, and is discharged to the outside of the composite filter element 100. As described above, in the composite filter element 100 of one embodiment of the present invention, the first filter element 210 and the second filter element 220 are manufactured as a single unit, so that the washing water W2 and the purified water C do not mix, but are discharged, thereby improving the operational reliability of the composite filter element 100.

[0232] Figure 4 This is a cross-sectional view showing the main body component, first upper cover component, second upper cover component, and third upper cover component of the composite filter element according to an embodiment of the present invention, separated from the lower cover component.

[0233] like Figure 4 As shown, in a composite filter element 100 of an embodiment of the present invention, a second upper cover component 250 is arranged below the third upper cover component 260, a first upper cover component 240 is arranged below the second upper cover component 250, a main body component 230 is arranged below the first upper cover component 240, and a lower cover component 270 is arranged below the main body component 230. As described above, the third upper cover component 260, the second upper cover component 250, the first upper cover component 240, the main body component 230, and the lower cover component 270 are stacked sequentially to make the first filter element component 210 (refer to...) Figure 3 The composite filter element 100 is assembled in a manner that has a dual structure with the aforementioned second filter element component 220, thereby improving the manufacturability of the composite filter element 100.

[0234] like Figure 3 and Figure 4 As shown, in a composite filter element 100 according to an embodiment of the present invention, the first upper cover component 240 includes a first upward guide 241 extending upward to allow the raw water W1 to flow into the first filter element component 210. That is, by providing the first upward guide 241 for the flow of the raw water W1 in the first upper cover component 240, the inflow of the raw water W1 and the outflow of the washing water W2 are separated, thereby ensuring the operational reliability of the composite filter element 100. Furthermore, the first partition wall 111a (refer to...) Figure 2 It is arranged to extend along the first upward guide 241 in the axial direction. That is, the raw water W1 passes through the first partition wall 111a (refer to...). Figure 2 The first upward guide 241 and the first filter element 210 move smoothly to the first filter element 210.

[0235] In addition, such as Figure 3 and Figure 4As shown, in a composite filter element 100 according to an embodiment of the present invention, the second upper cover component 250 includes a second upward guide 251 that extends upward to discharge the washing water W2 flowing through the first filter element component 210 to the outside. The second upward guide 251 is formed in a manner that surrounds and is spaced apart from the first upward guide 241. Furthermore, by providing the second upward guide 251 for the flow of the washing water W2 in the second upper cover component 250, the discharge of the washing water W2 and the outlet of the purified water C are separated, thereby ensuring the operational reliability of the composite filter element 100. Furthermore, the second partition wall 111b (refer to...) Figure 2 The second upward guide 251 extends axially along the second upward guide 251. That is, after the washing water W2 moves upward along the second upward guide 251, it passes through the second partition wall 111b (see reference 111b). Figure 2 It moves smoothly to the above-mentioned washing water discharge port 30.

[0236] In addition, such as Figure 3 and Figure 4 As shown, in a composite filter element 100 according to an embodiment of the present invention, a first downward guide 242 extending downward between the first filter element component 210 and the main body component 230 is provided on the first upper cover component 240. At this time, a first O-ring 301 is formed between the first filter element component 210 and the first downward guide 242 of the first upper cover component 240. The first O-ring 301 is made of rubber or silicone material. However, the first O-ring 301 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Furthermore, the first O-ring 301 prevents the washing water W2 moving through the first discharge channel PW2 from flowing back into the first filter element component 210 by sealing between the first filter element component 210 and the first downward guide 242. Additionally, a first spacer 311 is provided between the main body component 230 and the first downward guide 242 of the first upper cover component 240, such that they are arranged to be spaced apart from each other at a certain interval. That is, the first spacer 311 prevents the first discharge channel PW2 and the second discharge channel AW2 from blocking each other. Furthermore, the elasticity of the first O-ring 301 is provided by applying pressure to the first spacer 311 towards the main body component 230, thereby stably fixing the first top cover component 240 between the first filter element component 210 and the main body component 230 via the first spacer 311 and the first O-ring 301.

[0237] In addition, such as Figure 3 and Figure 4As shown, in a composite filter element 100 according to an embodiment of the present invention, a second downward guide 252 extending downward between the second filter element component 220 and the main body component 230 is provided on the second upper cover component 250. At this time, a second O-ring 302 is formed between the main body component 230 and the second downward guide 252 of the second upper cover component 250. The second O-ring 302 is made of rubber or silicone material. However, the second O-ring 302 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Furthermore, the second O-ring 302 prevents the second purified water C2 from flowing into the second discharge channel AW2 by sealing between the main body component 230 and the second downward guide 252. Additionally, a second spacer 312 is provided between the third upper cover component 260 and the second downward guide 252 of the second upper cover component 250, such that they are arranged to be spaced apart from each other at a certain interval. That is, the second spacer 312 prevents the second cover component 250 and the third cover component 260 from coming into contact and thus blocking the channel for discharging the second purified water C2. Furthermore, the elasticity of the second O-ring 302 is provided by applying pressure to the second spacer 312 toward the third cover component 260, thereby stably fixing the second cover component 250 between the third cover component 260 and the main body component 230 via the second spacer 312 and the second O-ring 302.

[0238] In addition, such as Figure 3 and Figure 4 As shown, in a composite filter element 100 according to an embodiment of the present invention, an outlet hole 265 for discharging the second purified water C2 is formed in the third upper cover member 260. The second purified water C2 filtered in the second filter element member 220 moves upward through the outlet hole 265. Furthermore, a third downward guide member 262 extending downward is provided in the third upper cover member 260 to fix the second filter element member 220 in a fixed configuration. The third downward guide member 262 contacts the upper outer peripheral surface of the second filter element member 220, thereby stably fixing the second filter element member 220 in the third upper cover member 260 and improving the durability of the composite filter element 100. Additionally, a third upward guide member 261 for allowing the discharging second purified water C2 to flow is formed in the third upper cover member 260. In this third upward guide 261, the second purified water C2 is connected to the purified water outlet port 20, so that the second purified water C2 stably flows out to the outside of the composite filter element 100, thereby ensuring the operational stability of the composite filter element 100.

[0239] like Figure 3 and Figure 4As shown, in a composite filter element 100 according to an embodiment of the present invention, the filter section 200 further includes a lower cover component 270 that is coupled to the lower side of the second filter element component 220. The lower cover component 270 includes a support guide 271 that extends upward in connection with the second filter element component 220. The support guide 271 contacts the outer peripheral surface of the lower side of the second filter element component 220, thereby stably fixing the second filter element component 220 and improving the durability of the composite filter element 100. Thus, the lower cover component 270 and the third upper cover component 260 together stably fix the second filter element component 220, thereby enabling modularization of the composite filter element through a sub-assembly process, thus improving workability.

[0240] Figure 5 This is a cross-sectional view showing the state in which the filter portion of a composite filter element according to an embodiment of the present invention is disposed in the outer shell.

[0241] like Figure 5 As shown, in a composite filter element 100 according to an embodiment of the present invention, a lower leg portion 272 extending downward toward the lower side of the housing component 112 is provided on the lower cover component 270. The lower leg portion 272 is formed such that the lower cover component 270 is spaced apart from the lower side of the housing component 112. Moreover, the lower leg portion 272 separates the lower cover component 270 from the lower side of the housing component 112, allowing the first purified water C1 flowing through the first filter element component 210 to move between the lower cover component 270 and the lower side of the housing component 112. At this time, a third O-ring 303 is provided between the lower side of the first filter element component 210 and the lower side of the main body component 230, and the third O-ring 303 is used to prevent the first purified water C1 flowing through the first filter element component 210 from moving to the first discharge channel PW2. Therefore, the first purified water C1 will not move to the first discharge channel PW2, and the first purified water C1 will flow stably in a state where it will not mix with the washing water W2, thereby ensuring the operational stability of the composite filter element.

[0242] At this time, as Figure 5As shown, in a composite filter element 100 according to an embodiment of the present invention, a first purified water flow path PC1 is formed between the side of the housing component 112 and the second filter element component 220. The first purified water C1 moves upward along the first purified water flow path PC1 and moves to the second filter element component 220. Moreover, a fourth O-ring 304 is provided between the lower cover component 270 and the lower side of the main body component 230. The fourth O-ring 304 is used to prevent the second purified water C2 flowing through the second filter element component 220 from flowing back into the lower side of the housing component 112. Thus, the second purified water C2 flows back into the lower side of the housing component 112, preventing it from moving to the second filter element component 220 again, thereby ensuring the operational stability of the composite filter element.

[0243] In addition, such as Figure 5 As shown, in a composite filter element 100 according to an embodiment of the present invention, a first purified water flow path PC1 is formed between the side of the housing component 112 and the second filter element component 220. The first purified water C1 moves upward along the first purified water flow path PC1 and moves to the second filter element component 220. Moreover, a fourth O-ring 304 is provided between the lower cover component 270 and the lower side of the main body component 230. The fourth O-ring 304 is used to prevent the second purified water C2 flowing through the second filter element component 220 from flowing back into the lower side of the housing component 112. Thus, the second purified water C2 flows back into the lower side of the housing component 112, preventing it from moving to the second filter element component 220 again, thereby ensuring the operational stability of the composite filter element.

[0244] In addition, such as Figure 5 As shown, in a composite filter element 100 according to an embodiment of the present invention, a fifth O-ring 305 is provided between the side of the housing component 112 and the third upper cover component 260. The fifth O-ring 305 is used to prevent the first purified water C1, which moves along the first purified water flow path PC1, from moving to the upper side of the third upper cover component 260. Therefore, the first purified water C1 moves stably upward through the first purified water flow path PC1, preventing it from directly moving to the upper side of the third upper cover component 260, and instead flowing into the second filter element component 220, thereby ensuring the operational stability of the composite filter element.

[0245] Figure 6 The following is a structural diagram of a water purifier according to an embodiment of the present invention.

[0246] like Figure 6As shown, a water purifier 1 according to an embodiment of the present invention includes: a raw water supply unit 410 for controlling the supply of raw water W1; a composite filter element 100 for receiving the raw water W1 from the raw water supply unit 410 and filtering it; a purified water discharge unit 420 for controlling the discharge of purified water C filtered by the composite filter element 100; and a washing module 430 disposed between the raw water supply unit 410 and the composite filter element 100, and controlling the supply of washing water W2 to the composite filter element 100, wherein the raw water W1 and the washing water W2 are selectively supplied to the composite filter element 100.

[0247] At this time, the raw water supply unit 410 controls the supply of raw water W1, thereby preventing excessive supply of raw water W1 to the composite filter element 100 to prevent damage to the composite filter element 100 due to the raw water W1, and preventing insufficient supply of raw water W1 to the composite filter element 100 to prevent a decrease in the flow of raw water W1 inside the composite filter element 100, thereby ensuring the operational stability of the water purifier. Furthermore, the purified water discharge unit 420 controls the discharge of purified water C, thereby extracting purified water in a manner that meets user needs, thereby improving user satisfaction.

[0248] Moreover, such as Figure 6 As shown, in a water purifier 1 according to an embodiment of the present invention, the composite filter element 100 is the aforementioned composite filter element. However, the composite filter element 100 is not limited to the aforementioned composite filter element, and can also be adapted to a structure that separately realizes raw water inlet, purified water outlet and washing water discharge.

[0249] In addition, such as Figure 6As shown, in a water purifier 1 according to an embodiment of the present invention, the washing module 430 includes a washing water control valve 431, which uses the raw water from the raw water supply unit 410 to control the supply of washing water W2. The washing water control valve 431 controls the supply of raw water W1 to either the composite filter element 100 or the washing module 430. Specifically, the washing water control valve 431 controls the supply of raw water W1 to the composite filter element 100 and also controls the supply of raw water W1 to the washing module 430; conversely, the washing water control valve 431 controls the supply of raw water W1 to either the composite filter element 100 or the washing module 430. Furthermore, the washing module 430 performs the function of sterilizing the raw water W1 received from the raw water supply unit 410. That is, the washing module 430 can be a sterilization device for sterilizing the raw water W1. For example, the washing module 430 can use ultrasound or plasma to sterilize the raw water W1 or add a sterilizing agent. In addition, it can be used in various ways to sterilize the raw water W1 and wash the composite filter element 100. The washing water W2 from the washing module 430 moves to the composite filter element 100, washes the composite filter element 100, and then discharges it to the outside through the washing water discharge valve 450.

[0250] Moreover, refer to Figure 6 The water extraction process and the washing process of the composite filter element 100 will be described below. First, to extract purified water, the raw water supply unit 410 opens the flow path of the raw water W1 to supply the raw water W1 to the composite filter element 100. At this time, the washing water control valve 431 controls the flow of the raw water W1 to the composite filter element 100 by opening the flow path of the raw water W1, and closes the flow path of the raw water W1 to the washing module 430. Furthermore, as the raw water W1 flows through the composite filter element 100, the composite filter element 100 generates purified water C. The purified water C is then extracted to the outside through the purified water discharge unit 420. At this time, the washing water discharge valve 450 closes the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0251] Subsequently, in order to wash the composite filter element 100, the raw water supply unit 410 opens the flow path of the raw water W1 to supply the raw water W1 to the washing module 430. At this time, the washing water control valve 431 controls the flow of the raw water W1 to the washing module 430 by opening the flow path of the washing water W2, and closes the flow path of the raw water W1 to the composite filter element 100. Moreover, the washing module 430 supplies the washing water W2 to the composite filter element 100. As the washing water W2 flows through the composite filter element 100, the composite filter element 100 is washed by the washing water W2. Moreover, the washing water W2 is discharged to the outside through the washing water discharge valve 450. At this time, the purified water discharge unit 420 closes the flow path of the purified water C, thereby ensuring the operational stability for washing the composite filter element 100.

[0252] Figure 7 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0253] like Figure 7 As shown, a water purifier 2 according to another embodiment of the present invention includes a raw water supply unit 410, a composite filter element 100, a purified water discharge unit 420, a purified water storage tank 440, and a washing module 430. Descriptions of components that are the same as or similar to those in the previous embodiments are replaced by the foregoing descriptions; the purified water storage tank 440 and the washing module 430 will be described with emphasis. The purified water storage tank 440 is connected to the purified water discharge unit 420. The purified water discharge unit 420 includes a first control valve 421, which controls the supply of purified water C filtered by the composite filter element 100 to the purified water storage tank 440. Furthermore, the purified water C is extracted to the outside by the control of the purified water discharge unit 420, or moved to the purified water storage tank 440 by the control of the first control valve 421.

[0254] Moreover, such as Figure 7As shown, in another embodiment of the water purifier 2 of the present invention, the washing module 430 includes a washing water control valve 433, which controls the supply of washing water W2 using purified water received from the purified water storage tank 440. When the washing water control valve 433 opens the flow path of the purified water C, the purified water C moves to the washing module 430 and is used as the washing water W2. At this time, a second control valve 432 is provided in the flow path of the raw water W1. The washing water W2 flowing through the washing module 430 moves to the second control valve 432 provided in the flow path of the raw water W1. The second control valve 432 controls the supply of raw water W1 to terminate the supply of raw water W1 and supply the washing water W2 to the composite filter element 100, or conversely, controls the supply of raw water W1 to the composite filter element 100 and can terminate the supply of washing water W2.

[0255] Moreover, refer to Figure 7 The water extraction process and the washing process of the composite filter element 100 will be described below. First, to extract purified water, the raw water supply unit 410 opens the flow path of the raw water W1 to supply it to the composite filter element 100. At this time, the second control valve 432 controls the flow of the raw water W1 to the composite filter element 100 by opening its flow path, and closes the flow path of the washing water W2 to the composite filter element 100. Furthermore, as the raw water W1 flows through the composite filter element 100, the composite filter element 100 generates purified water C. The purified water C is then extracted to the outside or moved to the purified water storage tank 440 under the control of the purified water discharge unit 420. At this time, the washing water control valve 433 and the washing water discharge valve 450 close the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0256] Subsequently, in order to wash the composite filter element 100, the washing water control valve 433 is controlled to open the flow path of the washing water W2, thereby allowing the purified water C to move to the washing module 430. Furthermore, the washing module 430 supplies the washing water W2 to the second control valve 432. At this time, the second control valve 432 closes the flow path of the raw water W1 and opens the flow path of the washing water W2 to the composite filter element 100. As the washing water W2 flows through the composite filter element 100, the composite filter element 100 is washed by the washing water W2. Moreover, the washing water W2 is discharged to the outside through the washing water discharge valve 450. At this time, the purified water discharge section 420 closes the flow path of the purified water C, thereby ensuring the operational stability for washing the composite filter element 100.

[0257] Figure 8The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0258] like Figure 8 As shown, another embodiment of the water purifier 3 of the present invention includes a raw water supply unit 410, a composite filter element 100, a purified water discharge unit 420, a purified water storage tank 441, and a washing module 430. Descriptions of components that are the same as or similar to those in the foregoing embodiments are replaced by the foregoing descriptions; the purified water storage tank 441 and the washing module 430 will be described with emphasis. The purified water storage tank 441 is disposed between the composite filter element 100 and the purified water discharge unit 420, and is connected to the purified water discharge unit 420. Purified water C filtered by the composite filter element 100 is supplied to the purified water storage tank 441. Furthermore, the purified water C is extracted to the outside under the control of the purified water discharge unit 420.

[0259] Moreover, such as Figure 8 As shown, in another embodiment of the water purifier 3 of the present invention, the washing module 430 includes a washing water control valve 434, which controls the supply of washing water W2 using purified water received from the purified water storage tank 441. When the washing water control valve 434 opens the flow path of the purified water C, the purified water C moves to the washing module 430 and is used as the washing water W2. At this time, a control valve 415 is provided in the flow path of the raw water W1. The washing water W2 flowing through the washing module 430 moves to the control valve 415 disposed in the flow path of the raw water W1. The control valve 415 controls the supply of raw water W1 to terminate the supply of raw water W1 and supply the washing water W2 to the composite filter element 100, or conversely, controls the supply of raw water W1 to the composite filter element 100 and can terminate the supply of washing water W2.

[0260] Moreover, refer to Figure 8 The water extraction process and the washing process of the composite filter element 100 will be described below. First, to extract purified water, the raw water supply unit 410 opens the flow path of the raw water W1 to supply it to the composite filter element 100. At this time, the control valve 415 controls the flow of the raw water W1 to the composite filter element 100 by opening its flow path, and closes the flow path of the washing water W2 to the composite filter element 100. Furthermore, as the raw water W1 flows through the composite filter element 100, the composite filter element 100 generates purified water C. After the purified water C is stored in the purified water storage tank 441, it is extracted to the outside under the control of the purified water discharge unit 420. At this time, the washing water control valve 434 and the washing water discharge valve 450 close the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0261] Subsequently, in order to wash the composite filter element 100, the purified water discharge section 420 closes the flow path of the purified water C to prevent the purified water C from being discharged to the outside. At this time, the washing water control valve 434 controls the flow path of the washing water W2 to allow the purified water C to move to the washing module 430. Moreover, the washing module 430 supplies the washing water W2 to the control valve 415. At this time, the control valve 415 closes the flow path of the raw water W1 and opens the flow path of the washing water W2 to the composite filter element 100. As the washing water W2 flows through the composite filter element 100, the composite filter element 100 is washed by the washing water W2. Moreover, the washing water W2 is discharged to the outside through the washing water discharge valve 450. As described above, by using the purified water C as the washing water W2, the washing efficiency of the composite filter element 100 is improved.

[0262] like Figures 9 to 11As shown, in another embodiment of the present invention, the composite filter element 500 includes: a housing portion 510, which is provided with a raw water inlet port 520, a purified water outlet port 530, and a washing water outlet port 540. The raw water inlet port 520 is used to allow raw water W1 to enter, the purified water outlet port 530 is used to allow filtered purified water C to exit, and the washing water outlet port 540 is used to discharge washing water W2; and a filter portion 600, which is provided with a first filter element component 610 and a second filter element component 620. The first filter element component 610 generates first purified water C1 by filtering the raw water W1, and the second filter element component 620 generates second purified water C2 by filtering the first purified water C1, and is stacked on the upper part of the first filter element component 610. That is, the raw water W1 entering through the raw water inlet port 520 moves to the filtration unit 600, and then sequentially moves to and is filtered by the first filter element 610 and the second filter element 620 disposed in the filtration unit 600. Finally, the filtered purified water C is discharged through the purified water outlet port 530 and provided to the user. Furthermore, the purified water C can be stored in a separate purified water tank (not shown), or it can be supplied to the cold water generation unit (not shown), hot water generation unit (not shown), and ice generation unit (not shown) used to generate cold water, hot water, and ice. Furthermore, after the first purified water C1 moves upward to the first filter element 610, it moves to the second filter element 620. After the washing water W2 washes the first filter element 610, it moves to the first discharge channel 691 formed between the first filter element 610 and the fifth upper cover element 670, and is discharged to the outside of the composite filter element 500 through the washing water discharge port 540. As described above, by configuring the system to not only allow the raw water W1 to enter and the purified water C to exit, but also to allow the washing water W2 to exit, the first filter element 610 and the second filter element 620 can be integrated to form a composite filter element. This improves user convenience. By using the washing water W2 to wash the first filter element 610, the product life of the composite filter element 500 is increased, further enhancing user convenience. In this case, the first filter element 610 can be an ultrafiltration (UF) filter element that filters pollutants through a hollow fiber membrane. Furthermore, the aforementioned second filter element 620 can be an activated carbon filter element or a microfiltration (MF) filter element. Additionally, the aforementioned second filter element 620 may also include a filter element using an electro-ionization method. The aforementioned electro-ionization method refers to electro-deionization (EDI), continuous electro-deionization (CEDI), capacitive deionization (CDI), etc.At this time, a separate filter element can be provided on the outer surface of the second filter element 620. For example, this separate filter element can be an NT filter element. This NT filter element can be made of an electrostatically charged material, such as a nano-trap material, to adsorb foreign matter contained in the incoming raw water W1. This electrostatically charged material can be configured to carry a positive charge. Thus, negatively charged foreign matter contained in the raw water W1, such as viruses, bacteria, and fine particles, can be electrostatically adsorbed in the NT filter element. Furthermore, this separate filter element can also be a sediment filter element.

[0263] like Figure 10 As shown, in another embodiment of the composite filter element of the present invention, the outer shell portion 510 includes: a head member 511, which is provided with a first partition wall 511a and a second partition wall 511b, wherein the first partition wall 511a is used to prevent the second purified water C2 from mixing with the washing water W2, and the second partition wall 511b is used to prevent the raw water W1 from mixing with the washing water W2; and a shell member 512, which extends from the head member 511 and has the filter portion 600 disposed inside. That is, it is a structure for allowing the incoming raw water W1, the outgoing second purified water C2, and the outgoing washing water W2 to be discharged / exported to the upper part of the composite filter element 500. For this purpose, a raw water region 521 for allowing the raw water W1 to enter, a second purified water region 531 for allowing the second purified water C2 to exit, and a washing water region 541 for discharging the washing water W2 are formed in the head member 511. Therefore, the first partition wall 511a and the second partition wall 511b are provided in the head component 511 of the outer shell 510 to form an independent flow path that prevents the raw water W1, the second purified water C2, and the washing water W2 from mixing. This concentrates the water outlet / discharge at the upper part of the composite filter element 500, thereby increasing the flexibility of the layout design of other parts. The washing water W2 flowing into the first filter element component 610 uses the raw water W1 to wash the first filter element component 610. However, the washing water W2 is not limited to using only the raw water W1; it can also utilize the purified water from the outlet.

[0264] like Figure 11As shown, the filter unit 600 includes: a first upper cover component 630, on which the first filter element component 610 is disposed below; a second upper cover component 640, on which the first upper cover component 630 is disposed below; a third upper cover component 650, on which the second filter element component 620 is disposed below; a fourth upper cover component 660, on which the third upper cover component 650 is disposed below; and a fifth upper cover component 670, on which the fourth upper cover component 660 is disposed below. At this time, the raw water W1 moves through the outside of the fifth top cover component 670 and flows into the first filter element component 610 from the bottom. The washing water W2 flows between the first filter element component 610 and the second top cover component 640, and moves to the upper part through the fourth top cover component 660 and the fifth top cover component 670. The purified water C moves to the upper part through the second filter element component 620 and the fourth top cover component 660. Thus, an independent flow path is formed that prevents the raw water W1, the washing water W2 and the purified water C from mixing, making the first filter element component 610 and the second filter element component 620 integrated, thereby improving manufacturability.

[0265] like Figure 11 As shown, a plurality of discharge holes 611 are formed on the side of the first filter element 610, spaced apart from each other. At this time, the plurality of discharge holes 611 are of the same size. However, the size of the plurality of discharge holes 611 is not limited to being the same; they may gradually increase or decrease in the downward direction. Furthermore, the plurality of discharge holes 611 are arranged at equal intervals. However, the plurality of discharge holes 611 are not limited to being arranged at equal intervals; they may also be arranged in a manner that moves away from each other in the downward direction. Moreover, a first discharge channel 691 for allowing the washing water W2 to flow is provided between the first filter element 610 and the fourth upper cover member 660. At this time, the plurality of discharge holes 611 are connected to the first discharge channel 691. Furthermore, the washing water W2 used to wash the first filter element 610 moves through the plurality of discharge holes 611 to the first discharge channel 691.

[0266] Furthermore, a second discharge channel 692, communicating with the first discharge channel 691, is provided between the fourth upper cover component 660 and the fifth upper cover component 670. At this time, the second discharge channel 692 communicates with the washing water discharge port 540 (see reference). Figure 10The washing water W2, which washes the first filter element 610, flows sequentially through the plurality of discharge holes 611, the first discharge channel 691, the second discharge channel 692, and the washing water discharge port 540, and is discharged to the outside of the composite filter element 500. As described above, in another embodiment of the composite filter element 500 of the present invention, the first filter element 610 and the second filter element 620 are manufactured as a single unit, so that the washing water W2 and the purified water C do not mix, but are discharged separately, thereby improving the operational reliability of the composite filter element 500.

[0267] Figure 12 A cross-sectional view showing the filtration section of a composite filter element according to another embodiment of the present invention in a separated state.

[0268] like Figure 11 and Figure 12 As shown, in the filtration section 600 of the composite filter element according to another embodiment of the present invention, the first filter element component 610 is arranged below the first upper cover component 630, the first upper cover component 630 is arranged below the second upper cover component 640, the second filter element component 620 is arranged below the third upper cover component 650, the third upper cover component 650 is arranged below the fourth upper cover component 660, and the fourth upper cover component 660 is arranged below the fifth upper cover component 670. As described above, the first upper cover component 630, the second upper cover component 640, the third upper cover component 650, the fourth upper cover component 660, and the fifth upper cover component 670 are assembled in a manner in which the first filter element component 610 and the second filter element component 620 have a stacked structure, thereby improving the manufacturability of the composite filter element 500.

[0269] like Figure 11 and Figure 12As shown, in another embodiment of the composite filter element 600 of the present invention, the first upper cover member 630 includes a first upward guide member 631 that extends upward to allow the first purified water C1 flowing through the first filter element member 610 to flow into the second filter element member 620. That is, by providing the first upward guide member 631 for the flow of the first purified water C1 to the first upper cover member 630, even if the first filter element member 610 and the second filter element member 620 are made into a stacked structure, the first purified water C1 smoothly moves towards the upper part of the second filter element member 620, thereby ensuring the operational reliability of the composite filter element 500. Furthermore, the first upper cover member 630 includes a first downward guide member 632 that extends downward. The first downward guide 632 is formed to surround the upper part of the first filter element 610 and is combined with the first filter element 610, thereby the first upper cover 630 is stably combined with the upper part of the first filter element 610 through the first downward guide 632.

[0270] In addition, such as Figure 11 and Figure 12 As shown, in another embodiment of the composite filter element 600 of the present invention, the second upper cover member 640 includes a second upward guide member 641 that extends upward to move the washing water W2 flowing through the first filter element member 610 to the second discharge channel 692. Furthermore, the second upward guide member 641 is formed in a manner that surrounds and is spaced apart from the first upward guide member 631. That is, the washing water W2 moves between the first upward guide member 631 and the second upward guide member 641 to prevent the washing water W2 from mixing with the first purified water C1, thereby ensuring the operational reliability of the composite filter element 500. The second upper cover member 640 also includes a second downward guide member 642 that extends downward. Moreover, the second downward guide member 642 is formed in a manner that surrounds and is spaced apart from the first filter element member 610. That is, a first discharge channel 691 is provided between the second downward guide 642 and the first filter element 610 for moving the washing water W2 that washes the first filter element 610. Furthermore, a hole 645 is formed in the second upper cover 640 for moving the washing water W2. Thus, the washing water W2 flowing through the first discharge channel 691 moves through the hole 645 to the second discharge channel 692. As described above, by providing an independent flow path in the filter section 600 to prevent the washing water W2 from mixing with the raw water W1 or the purified water C, user satisfaction is improved by ensuring the quality of the purified water C.

[0271] In addition, such as Figure 11 and Figure 12As shown, in another embodiment of the composite filter element 600 of the present invention, the third upper cover component 650 includes an upper cover guide 651 that extends downward in conjunction with the second filter element component 620. Furthermore, the upper cover guide 651 is formed to surround the upper portion of the second filter element component 620, such that the third upper cover component 650 is stably fixed to the second filter element component 620 by the upper cover guide 651.

[0272] In addition, such as Figure 11 and Figure 12 As shown, in the filtration section 600 of the composite filter element in another embodiment of the present invention, the fourth upper cover component 660 includes a fourth upward guide member 661 extending upward. Furthermore, the second purified water C2 flowing through the second filter element component 620 moves to the upper part via the fourth upward guide member 661, thereby separating the discharge of the washing water W2 and the outlet of the purified water C, thus ensuring the operational reliability of the composite filter element 500. Furthermore, the first partition wall 511a (refer to...) Figure 10 The fourth upward guide member 661 extends along the axis. That is, the purified water C passes through the first partition wall 511a (see reference...). Figure 10 The fourth upward guide member 661 and the aforementioned fourth upper cover member 660 together discharge water to the outside of the composite filter element 500. Furthermore, the fourth upper cover member 660 includes a fourth downward guide member 662 extending downward. The fourth downward guide member 662 is spaced apart while surrounding the side of the second filter element member 620. Moreover, the second purified water C2 flowing through the second filter element member 620 moves upward between the fourth downward guide member 662 and the second filter element member 620, while the washing water W2 moves along the outside of the fourth downward guide member 662. This prevents the second purified water C2 from mixing with the washing water W2, thereby ensuring the quality of the purified water.

[0273] In addition, such as Figure 11 and Figure 12 As shown, in the filtration section 600 of the composite filter element in another embodiment of the present invention, the fifth upper cover component 670 includes a fifth upward guide member 671 extending upward. Furthermore, the washing water W2 moves to the upper part through the fifth upward guide member 671, thereby separating the discharge of the washing water W2 from the inflow of the raw water W1, thus ensuring the operational reliability of the composite filter element 500. Furthermore, the second partition wall 511b (refer to...) Figure 10 The fifth upward guide 671 extends axially along the aforementioned fifth upward guide 671. That is, after the washing water W2 moves to the upper part along the fifth upward guide 671, it passes through the second partition wall 511b (see reference). Figure 10The water flows smoothly to the washing water discharge port 540. Furthermore, the fifth upper cover component 670 includes a downwardly extending fifth downward guide 672. The fifth downward guide 672 is spaced apart from the side of the fourth downward guide 662. That is, a second discharge channel 692 for moving the washing water W2 upwards is formed between the fourth downward guide 662 and the fifth downward guide 672. Moreover, after the washing water W2 flows sequentially through the first filter element component 610, the first discharge channel 691, and the orifice 645, it moves through the second discharge channel 692 to the inside of the fifth upward guide 671. Furthermore, the raw water W1 moves along the outside of the fifth downward guide 672, thereby preventing the raw water W1 from mixing with the washing water W2, thus ensuring the operational stability of the composite filter element 500.

[0274] like Figure 11 and Figure 12 As shown, in another embodiment of the composite filter element, the filter section 600 further includes a lower cover member 680 that is coupled to the lower side of the second filter element member 620. The lower cover member 680 includes a lower cover guide 681 that extends upwardly in connection with the second filter element member 620. The lower cover guide 681 contacts the outer peripheral surface of the lower side of the second filter element member 620, thereby stably fixing the second filter element member 620 and improving the durability of the composite filter element 500. Thus, the lower cover member 680 and the third upper cover member 650 together stably fix the second filter element member 620, thereby enabling modularization of the composite filter element through a sub-assembly process, thus improving workability.

[0275] In addition, such as Figure 11 and Figure 12 As shown, in the filter section 600 of the composite filter element of another embodiment of the present invention, a first O-ring 701 is formed between the second upper cover component 640 and the first filter element component 610, which is used to prevent the washing water W2 from flowing back into the first filter element component 610. The first O-ring 701 is made of rubber or silicone material. However, the first O-ring 701 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the first O-ring 701 prevents the washing water W2 moving through the first discharge channel 691 from flowing back into the first filter element component 610 by sealing between the first filter element component 610 and the second upper cover component 640.

[0276] In addition, such as Figure 11 and Figure 12As shown, in the filter section 600 of the composite filter element of another embodiment of the present invention, a second O-ring 702 is formed between the second upper cover component 640 and the fifth upper cover component 670, which is used to prevent the washing water W2 from flowing back into the first filter element component 610. The second O-ring 702 is made of rubber or silicone material. However, the second O-ring 702 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the second O-ring 702 prevents the washing water W2 from mixing with the raw water W1 by sealing between the second upper cover component 640 and the fifth upper cover component 670.

[0277] In addition, such as Figure 11 and Figure 12 As shown, in the filter section 600 of the composite filter element of another embodiment of the present invention, a third O-ring 703 is formed between the second upper cover member 640 and the lower cover member 680, which is used to prevent the second purified water C2 from moving to the second discharge channel 692. The third O-ring 703 is made of rubber or silicone material. However, the third O-ring 703 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the third O-ring 703 prevents the second purified water C2 from mixing with the washing water W2 by sealing between the second upper cover member 640 and the lower cover member 680.

[0278] In addition, such as Figure 11 and Figure 12 As shown, in the filter section 600 of the composite filter element of another embodiment of the present invention, a fourth O-ring 704 is formed between the first upper cover component 630 and the second upper cover component 640, which is used to prevent the second purified water C2 from moving to the first discharge channel 691. The fourth O-ring 704 is made of rubber or silicone material. However, the fourth O-ring 704 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the fourth O-ring 704 prevents the second purified water C2 of the second filter element component 620 from mixing with the washing water W2 by sealing between the first upper cover component 630 and the second upper cover component 640.

[0279] In addition, such as Figure 11 and Figure 12As shown, in another embodiment of the composite filter element 600 of the present invention, a fifth O-ring 705 is formed between the lower cover member 680 and the fourth upper cover member 660 to prevent the second purified water C2 from moving to the second discharge channel 692. The fifth O-ring 705 is made of rubber or silicone material. However, the fifth O-ring 705 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the fifth O-ring 705 prevents the second purified water C2 flowing through the second filter element 620 from mixing with the washing water W2 by sealing between the lower cover member 680 and the fourth upper cover member 660.

[0280] In addition, such as Figure 11 and Figure 12 As shown, in the filter section 600 of the composite filter element of another embodiment of the present invention, a first spacer 711 is provided between the fourth upper cover member 660 and the fifth upper cover member 670 to separate them from each other at a certain interval. Thus, the first spacer 711 prevents the second discharge channel 692 from being blocked. Furthermore, the first spacer 711 is formed of an elastic material such as rubber, and the elasticity of the first spacer 711 is provided between the fourth upper cover member 660 and the fifth upper cover member 670 in a direction away from each other, so that the fifth upper cover member 670 is stably fixed to the fourth upper cover member 660 by the first spacer 711.

[0281] In addition, such as Figure 11 and Figure 12 As shown, in the filter section 600 of the composite filter element of another embodiment of the present invention, the fifth upper cover component 670 and the housing component 512 (see reference) Figure 13 A second spacer 712 is provided between the fifth upper cover component 670 and the housing component 512 (see reference 512) to separate them at a certain interval. Thus, the second spacer 712 prevents the fifth upper cover component 670 from contacting the housing component 512 (see reference 512). Figure 13 The spacer 712 is blocked between the fifth top cover component 670 and the housing component 512 (see reference 670), allowing the raw water W1 to move smoothly along the outer side of the fifth top cover component 670. Furthermore, the second spacer 712 is formed of an elastic material such as rubber, and the elasticity of the second spacer 712 is felt between the fifth top cover component 670 and the housing component 512 (see reference 670). Figure 13 The fifth cover component 670 is provided in a direction away from each other, such that it is stably fixed to the housing component 512 (see reference 712) by the second spacer 712. Figure 13 ).

[0282] In addition, such as Figure 11 and Figure 12As shown, in the filter section 600 of the composite filter element of another embodiment of the present invention, a third spacer 713 is provided between the third upper cover member 650 and the fourth upper cover member 660 to separate them at a certain interval. Thus, the third spacer 713 prevents the passage for the movement of the second purified water C2 from being blocked. Furthermore, the third spacer 713 is formed of an elastic material such as rubber, and the elasticity of the third spacer 713 is provided between the third upper cover member 650 and the fourth upper cover member 660 in a direction away from each other, so that the fourth upper cover member 660 is stably fixed to the third upper cover member 650 by the third spacer 713.

[0283] Figure 13 This is a cross-sectional view showing the state in which the filter portion of the composite filter element of another embodiment of the present invention is disposed in the outer shell.

[0284] like Figure 13 As shown, in another embodiment of the composite filter element 500 of the present invention, a lower leg 682 extending downward toward the second upper cover member 640 is provided on the lower cover member 680. The lower leg 682 is formed such that the lower cover member 680 is spaced apart from the second upper cover member 640. Moreover, the lower leg 682 separates the lower cover member 680 from the second upper cover member 640, thereby ensuring the operational stability of the composite filter element 500 after the washing water W2 flowing through the first discharge channel 691 moves to the second discharge channel 692 after passing through the upper part of the second upper cover member 640.

[0285] At this time, as Figure 13 As shown, in another embodiment of the composite filter element 500 of the present invention, a raw water flow path 695 is formed between the housing component 512 and the fourth upper cover component 660. The raw water flows through the raw water inlet port 520 (see reference). Figure 10 The incoming raw water W1 moves along the raw water flow path 695 to the lower part of the first filter element 610. Furthermore, the first filter element 610 is provided with filter element legs 612 extending downward toward the lower side of the housing member 512. The filter element legs 612 are formed to provide a channel for the movement of the raw water W1 between the first filter element 610 and the lower side of the housing member 512. Moreover, the raw water W1 flowing through the raw water flow path 695 flows into the first filter element 610 by passing between the lower side of the first filter element 610 and the housing member 512.

[0286] In addition, such as Figure 13As shown, in another embodiment of the composite filter element 500 of the present invention, the first purified water C1 flowing through the first filter element component 610 moves to the inner side of the second filter element component 620. At this time, a purified water channel 696 is formed between the second filter element component 620 and the fourth upper cover component 660. Moreover, the second purified water C2 flowing through the second filter element component 620 moves to the upper part along the purified water channel 696 and then passes through the purified water outlet port 520 (see reference). Figure 10 Water is discharged to the outside of the composite filter element 500. As described above, in another embodiment of the composite filter element 500 of the present invention, the first filter element 610 and the second filter element 620 are stacked in the housing component 512 and assembled by the first upper cover component 630, the second upper cover component 640, the third upper cover component 650, the fourth upper cover component 660 and the fifth upper cover component 670 and the lower cover component 680, so that an independent flow path is formed in the upper part for the inlet of the raw water W1, the outlet of the purified water C and the discharge of the washing water W2. Thus, the composite filter element is modularized, and the user does not need to operate a separate structure for washing, thereby improving user convenience.

[0287] Figure 14 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0288] like Figure 14 As shown, another embodiment of the water purifier 800 of the present invention includes: a raw water supply unit 801 for controlling the supply of raw water W1; a composite filter element 500 for receiving the raw water W1 from the raw water supply unit 801 and filtering it; a purified water discharge unit 802 for controlling the discharge of purified water C filtered by the composite filter element 500; and a washing module 803 disposed between the raw water supply unit 801 and the composite filter element 500, and controlling the supply of washing water W2 to the composite filter element 500, wherein the raw water W1 and the washing water W2 are selectively supplied to the composite filter element 500.

[0289] At this time, the raw water supply unit 801 controls the supply of raw water W1, thereby preventing excessive supply of raw water W1 to the composite filter element 500 to prevent damage to the composite filter element 500 due to the raw water W1, and preventing insufficient supply of raw water W1 to the composite filter element 500 to prevent a decrease in the flow of raw water W1 inside the composite filter element 500, thereby ensuring the operational stability of the water purifier. Furthermore, the purified water discharge unit 802 controls the discharge of purified water C, thereby extracting purified water in a manner that meets user needs, thereby improving user satisfaction.

[0290] Moreover, such as Figure 14As shown, in another embodiment of the water purifier 800 of the present invention, the composite filter element 500 is the same as that in the previous embodiment. However, the composite filter element 500 is not limited to the aforementioned composite filter element, and can also be adapted to a structure that separately realizes raw water inlet, purified water outlet and washing water discharge.

[0291] In addition, such as Figure 14 As shown, in another embodiment of the water purifier 800 of the present invention, the washing module 803 includes a washing water control valve 803a, which uses the raw water from the raw water supply unit 801 to control the supply of washing water W2. The washing water control valve 803a controls the supply of raw water W1 to either the composite filter element 500 or the washing module 803. Specifically, the washing water control valve 803a controls the supply of raw water W1 to the composite filter element 500 and also controls the supply of raw water W1 to the washing module 803; conversely, the washing water control valve 803a controls the supply of raw water W1 to either the composite filter element 500 or the washing module 803. Furthermore, the washing module 803 performs the function of sterilizing the raw water W1 received from the raw water supply unit 801. That is, the washing module 803 can be a sterilization device for sterilizing the raw water W1. For example, the washing module 803 can use ultrasound or plasma to sterilize the raw water W1 or add a sterilizing agent. In addition, it can be used in various ways to sterilize the raw water W1 and wash the composite filter element 500. The washing water W2 of the washing module 803 moves to the composite filter element 500, washes the composite filter element 500, and is then discharged to the outside through the washing water discharge valve 805.

[0292] Moreover, refer to Figure 14 The water extraction process and the washing process of the composite filter element 500 will be described below. First, to extract purified water, the raw water supply unit 801 opens the flow path of the raw water W1 to supply it to the composite filter element 500. At this time, the washing water control valve 803a controls the flow of the raw water W1 to the composite filter element 500 by opening its flow path, and closes the flow path of the raw water W1 to the washing module 803. Furthermore, as the raw water W1 flows through the composite filter element 500, the composite filter element 500 generates purified water C. The purified water C is then extracted to the outside through the purified water discharge unit 802. At this time, the washing water discharge valve 805 closes the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0293] Subsequently, in order to wash the composite filter element 500, the raw water supply unit 801 opens the flow path of the raw water W1 to supply the raw water W1 to the washing module 803. At this time, the washing water control valve 803a controls the flow path of the washing water W2 to allow the raw water W1 to move to the washing module 803, and closes the flow path of the raw water W1 to the composite filter element 500. Furthermore, the washing module 803 supplies the washing water W2 to the composite filter element 500. As the washing water W2 flows through the composite filter element 500, the composite filter element 500 is washed by the washing water W2. Furthermore, the washing water W2 is discharged to the outside through the washing water discharge valve 805. At this time, the purified water discharge unit 802 closes the flow path of the purified water C, thereby ensuring the operational stability for washing the composite filter element 500.

[0294] Figure 15 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0295] like Figure 15 As shown, another embodiment of the water purifier 810 of the present invention includes a raw water supply unit 801, a composite filter element 500, a purified water discharge unit 802, a purified water storage tank 804, and a washing module 803. Descriptions of components that are the same as or similar to those in the foregoing embodiments are replaced by the foregoing descriptions, with a focus on the purified water storage tank 804 and the washing module 803. The purified water storage tank 804 is connected to the purified water discharge unit 802. The purified water discharge unit 802 includes a first control valve 802a, which controls the supply of purified water C filtered by the composite filter element 500 to the purified water storage tank 804. Furthermore, the purified water C is extracted to the outside by the control of the purified water discharge unit 802, or moved to the purified water storage tank 804 by the control of the first control valve 802a.

[0296] Moreover, such as Figure 15As shown, in another embodiment of the water purifier 810 of the present invention, the washing module 803 includes a washing water control valve 803c, which controls the supply of washing water W2 using purified water received from the purified water storage tank 804. When the washing water control valve 803c opens the flow path for the purified water C, the purified water C moves to the washing module 803 and is used as the washing water W2. At this time, a second control valve 803b is provided in the flow path for the raw water W1. The washing water W2 flowing through the washing module 803 moves to the second control valve 803b provided in the flow path for the raw water W1. The second control valve 803b is controlled to terminate the supply of the raw water W1 and supply the washing water W2 to the composite filter element 500, or conversely, to supply the raw water W1 to the composite filter element 500 and terminate the supply of washing water W2.

[0297] Moreover, refer to Figure 15 The water extraction process and the washing process of the composite filter element 500 will be described below. First, to extract purified water, the raw water supply unit 801 opens the flow path of the raw water W1 to supply it to the composite filter element 500. At this time, the second control valve 803b controls the flow of the raw water W1 to the composite filter element 500 by opening its flow path, and closes the flow path of the washing water W2 to the composite filter element 500. Furthermore, as the raw water W1 flows through the composite filter element 500, the composite filter element 500 generates purified water C. The purified water C is then extracted to the outside or moved to the purified water storage tank 804 under the control of the purified water discharge unit 802. At this time, the washing water control valve 803c and the washing water discharge valve 805 close the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0298] Subsequently, in order to wash the composite filter element 500, the washing water control valve 803c is controlled to open the flow path of the washing water W2, thereby allowing the purified water C to move to the washing module 803. Furthermore, the washing module 803 supplies the washing water W2 to the second control valve 803b. At this time, the second control valve 803b closes the flow path of the raw water W1 and opens the flow path of the washing water W2 to the composite filter element 500. As the washing water W2 flows through the composite filter element 500, the composite filter element 500 is washed by the washing water W2. Moreover, the washing water W2 is discharged to the outside through the washing water discharge valve 805. At this time, the purified water discharge section 802 closes the flow path of the purified water C, thereby ensuring the operational stability for washing the composite filter element 500.

[0299] Figure 16The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0300] like Figure 16 As shown, another embodiment of the water purifier 820 of the present invention includes a raw water supply unit 801, a composite filter element 500, a purified water discharge unit 802, a purified water storage tank 804a, and a washing module 803. Descriptions of components that are the same as or similar to those in the foregoing embodiments are replaced by the foregoing descriptions; the purified water storage tank 804a and the washing module 803 will be described with emphasis. The purified water storage tank 804a is disposed between the composite filter element 500 and the purified water discharge unit 802, and is connected to the purified water discharge unit 802. Purified water C filtered by the composite filter element 500 is supplied to the purified water storage tank 804a. Furthermore, the purified water C is extracted to the outside under the control of the purified water discharge unit 802.

[0301] Moreover, such as Figure 16 As shown, in another embodiment of the water purifier 820 of the present invention, the washing module 803 includes a washing water control valve 803d, which controls the supply of washing water W2 using purified water received from the purified water storage tank 804a. When the washing water control valve 803d opens the flow path for the purified water C, the purified water C moves to the washing module 803 and is used as the washing water W2. At this time, a control valve 801a is provided in the flow path for the raw water W1. The washing water W2 flowing through the washing module 803 moves to the control valve 801a located in the flow path for the raw water W1. The control valve 801a is controlled to terminate the supply of the raw water W1 and supply the washing water W2 to the composite filter element 500, or conversely, to supply the raw water W1 to the composite filter element 500 and terminate the supply of washing water W2.

[0302] Moreover, refer to Figure 16 The water extraction process and the washing process of the composite filter element 500 will be described below. First, to extract purified water, the raw water supply unit 801 opens the flow path of the raw water W1 to supply it to the composite filter element 500. At this time, the control valve 801a controls the flow of the raw water W1 to the composite filter element 500 by opening its flow path, and closes the flow path of the washing water W2 to the composite filter element 500. Furthermore, as the raw water W1 flows through the composite filter element 500, the composite filter element 500 generates purified water C. After the purified water C is stored in the purified water storage tank 804a, it is extracted to the outside under the control of the purified water discharge unit 802. At this time, the washing water control valve 803d and the washing water discharge valve 805 close the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0303] Subsequently, in order to wash the composite filter element 500, the purified water discharge section 802 closes the flow path of the purified water C to prevent the purified water C from being discharged to the outside. At this time, the washing water control valve 803d is controlled to open the flow path of the washing water W2, allowing the purified water C to move to the washing module 803. Furthermore, the washing module 803 supplies the washing water W2 to the control valve 801a. At this time, the control valve 801a closes the flow path of the raw water W1 and opens the flow path of the washing water W2 to the composite filter element 500. As the washing water W2 flows through the composite filter element 500, the composite filter element 500 is washed by the washing water W2. Furthermore, the washing water W2 is discharged to the outside through the washing water discharge valve 805. As described above, by using the purified water C as the washing water W2, the washing efficiency of the composite filter element 500 is improved.

[0304] Figure 17 The diagram is provided to briefly illustrate the appearance of the composite filter element according to another embodiment of the present invention. Figure 18 To illustrate a plan view of the head component of a composite filter element according to another embodiment of the present invention, Figure 19 This is a cross-sectional view showing the assembled state of the filter section of a composite filter element according to another embodiment of the present invention. Here, 'a' refers to the axial direction of the composite filter element, and 'r' refers to the radial direction of the composite filter element.

[0305] like Figures 17 to 19As shown, the composite filter element 900 of the present invention includes: a housing portion 910, which is provided with a raw water inlet port 920, a purified water outlet port 930, and a washing water outlet port 940. The raw water inlet port 920 is used to allow raw water W1 to enter, the purified water outlet port 930 is used to allow filtered purified water C to exit, and the washing water outlet port 940 is used to discharge washing water W2; and a filtration portion 1000, which is provided with a first filter element component 1010 and a second filter element component 1020. The first filter element component 1010 generates first purified water C1 by filtering the raw water W1, and the second filter element component 1020 generates second purified water C2 by filtering the first purified water C1, and is disposed at the lower part of the first filter element component 1010. That is, the raw water W1 entering through the raw water inlet port 920 moves to the filtration unit 1000, and then sequentially moves to the first filter element 1010 and the second filter element 1020 installed in the filtration unit 1000 and is filtered. Finally, the filtered purified water C is discharged through the purified water outlet port 930 and provided to the user. Furthermore, the purified water C can be stored in a separate purified water tank (not shown), or it can be supplied to the cold water generation unit (not shown), hot water generation unit (not shown), and ice generation unit (not shown) used to generate cold water, hot water, and ice. Furthermore, after the first purified water C1 moves downward to the lower side of the first filter element 1010, it moves to the second filter element 1020. After the washing water W2 washes the first filter element 1010, it moves to the first discharge channel 1101 formed between the first filter element 1010 and the first main body 1030, and is discharged to the outside of the composite filter element 900 through the washing water discharge port 940. As described above, by configuring the system to not only allow the raw water W1 to enter and the purified water C to exit, but also to allow the washing water W2 to exit, the composite filter element can be constructed by integrating the first filter element 1010 and the second filter element 1020. This improves user convenience. By using the washing water W2 to wash the first filter element 1010, the product life of the composite filter element 900 is increased, further enhancing user convenience. At this time, the first filter element 1010 can be an ultrafiltration (UF) filter element that filters pollutants through a hollow fiber membrane. Furthermore, the second filter element 1020 can be an activated carbon filter element or a microfiltration (MF) filter element. Additionally, the second filter element 1020 may also include an electroionization filter element.The aforementioned electroionization methods refer to electrodeionization (EDI), continuous electrodeionization (CEDI), capacitive deionization (CDI), etc. In this case, a separate filter element can be provided on the outer surface of the second filter element 1020. For example, this separate filter element can be an NT filter element. This NT filter element can be made of an electrostatically charged material, such as a nano-trap material, to adsorb foreign matter contained in the incoming raw water W1. This electrostatically charged material can be configured to carry a positive charge. Thus, negatively charged foreign matter contained in the raw water W1, such as viruses, bacteria, and fine particles, can be electrostatically adsorbed in the NT filter element. Furthermore, this separate filter element can also be a sediment filter element.

[0306] like Figure 18 As shown, in another embodiment of the composite filter element of the present invention, the outer shell portion 910 includes: a head member 911, which is provided with a first partition wall 911a and a second partition wall 911b, wherein the first partition wall 911a is used to prevent the raw water W1 from mixing with the washing water W2, and the second partition wall 911b is used to prevent the purified water C2 from mixing with the washing water W2; and a shell member 912, which extends from the head member 911 and has the filter portion 1000 disposed inside. That is, it is a structure for allowing the incoming raw water W1, the outgoing second purified water C2, and the discharged washing water W2 to be discharged / exported to the upper part of the composite filter element 900. For this purpose, a raw water region 921 for allowing the raw water W1 to enter, a second purified water region 931 for allowing the second purified water C2 to exit, and a washing water region 941 for discharging the washing water W2 are formed in the head member 911. Therefore, the first partition wall 911a and the second partition wall 911b are provided in the head component 911 of the outer shell 910 to form an independent flow path that prevents the raw water W1, the second purified water C2, and the washing water W2 from mixing. This concentrates the water outlet / discharge at the upper part of the composite filter element 900, thereby increasing the flexibility of the layout design of other parts. The washing water W2 flowing into the first filter element component 1010 uses the raw water W1 to wash the first filter element component 1010. However, the washing water W2 is not limited to using only the raw water W1; it can also utilize the purified water from the outlet.

[0307] like Figure 19As shown, the filter unit 1000 includes: a first main body component 1030 that surrounds the first filter element component 1010; a first upper cover component 1040 that has the first filter element component 1010 disposed on its lower side; a second upper cover component 1050 that has the first upper cover component 1040 disposed on its lower side and has the first main body component 1030 disposed on its lower side; a first lower cover component 1060 that has the first filter element component 1010 disposed on its upper side and passes through the second filter element component 1020; a second main body component 1070 that surrounds the second filter element component 1020; and a third upper cover component 1080 that has the second filter element component 1020 disposed on its lower side. At this time, the raw water W1 moves through the inside of the first upper cover component 1040, the washing water W2 flows between the first filter element component 1010 and the first main body component 1030, and moves upward through the space between the first upper cover component 1040 and the second upper cover component 1050, and the purified water C moves upward through the inside of the housing component 912. Thus, an independent flow path is formed that prevents the raw water W1, the washing water W2 and the purified water C from mixing, making the first filter element component 1010 and the second filter element component 1020 integrated, thereby improving manufacturability.

[0308] like Figure 19 As shown, a plurality of discharge holes 1011 are formed on the side of the first filter element 1010, spaced apart from each other. At this time, the plurality of discharge holes 1011 are of the same size. However, the size of the plurality of discharge holes 1011 is not limited to being the same; they may gradually increase or decrease in the downward direction. Furthermore, the plurality of discharge holes 1011 are arranged at equal intervals. However, the plurality of discharge holes 1011 are not limited to being arranged at equal intervals; they may also be arranged in a manner that moves away from each other in the downward direction. Moreover, a first discharge channel 1101 for allowing the washing water W2 to flow is provided between the first filter element 1010 and the first main body 1030. At this time, the plurality of discharge holes 1011 are connected to the first discharge channel 1101. Furthermore, the washing water W2 used to wash the first filter element 1010 moves through the plurality of discharge holes 1011 to the first discharge channel 1101. Furthermore, a second discharge channel 1102, communicating with the first discharge channel 1101, is provided between the first upper cover component 1040 and the second upper cover component 1050. At this time, the second discharge channel 1102 communicates with the washing water discharge port 940 (see reference). Figure 18The washing water W2, which washes the first filter element 1010, flows sequentially through the plurality of discharge holes 1011, the first discharge channel 1101, the second discharge channel 1102, and the washing water discharge port 940, and is discharged to the outside of the composite filter element 900. As described above, in another embodiment of the composite filter element 900 of the present invention, the first filter element 1010 and the second filter element 1020 are manufactured as a single unit, so that the washing water W2 and the purified water C do not mix, but are discharged, thereby improving the operational reliability of the composite filter element 900.

[0309] Figure 20 This is a cross-sectional view showing the state of the filter portion of a composite filter element according to another embodiment of the present invention.

[0310] like Figure 19 and Figure 20 As shown, in the filtration section 1000 of the composite filter element according to another embodiment of the present invention, the first filter element component 1010 is arranged below the first upper cover component 1040, the first upper cover component 1040 is arranged below the second upper cover component 1050, the first lower cover component 1060 is arranged below the first filter element component 1010, and the second filter element component 1020 is arranged below the third upper cover component 1080. The first upper cover component 1040, the second upper cover component 1050, the first lower cover component 1060, and the third upper cover component 1080 are assembled in a manner in which the first filter element component 1010 and the second filter element component 1020 have a stacked structure, thereby improving the manufacturability of the composite filter element 900. Furthermore, the first main body component 1030 surrounds the first filter element component 1010 while being spaced apart from it. As a result, additional flow paths are formed on the inner and outer sides of the first main body component 1030. Thus, the first filter element component 1010 and the second filter element component 1020 have a stacked structure, and the raw water W1, the purified water C, and the washing water W2 will not mix and form flow paths, thereby ensuring the operational reliability of the composite filter element 900.

[0311] like Figure 19 and Figure 20 As shown, in the filtration section 1000 of the composite filter element according to another embodiment of the present invention, the first upper cover component 1040 includes a first upward guide 1041 extending upward to allow the raw water W1 to flow into the first filter element component 1010. That is, by providing the first upward guide 1041 for the flow of the raw water W1 in the first upper cover component 1040, the inflow of the raw water W1 and the outflow of the washing water W2 are separated, thereby ensuring the operational reliability of the composite filter element 900. Furthermore, the first partition wall 911a (refer to...) Figure 18 It is arranged to extend axially along the first upward guide 1041. That is, the raw water W1 passes through the first partition wall 911a (see reference). Figure 18 The first upper cover component 1040 and the first upward guide 1041 smoothly move to the first filter element component 1010. Furthermore, the first upper cover component 1040 includes a downwardly extending first downward guide 1042. The first downward guide 1042 is formed to surround the upper part of the first filter element component 1010 and is combined with the first filter element component 1010, thereby stably combining the first upper cover component 1040 with the upper part of the first filter element component 1010 via the first downward guide 1042.

[0312] In addition, such as Figure 19 and Figure 20 As shown, in the filter section 1000 of the composite filter element according to another embodiment of the present invention, the second upper cover member 1050 includes a second upward guide member 1051 that extends upward to discharge the washing water W2 flowing through the first filter element member 1010 to the outside of the composite filter element 900. In this case, the second upward guide member 1051 is formed in a manner that surrounds and is spaced apart from the first upward guide member 1041. Furthermore, by providing the second upward guide member 1051 through which the washing water W2 flows in the second upper cover member 1050, the discharge of the washing water W2 and the outlet of the purified water C are separated, thereby ensuring the operational reliability of the composite filter element 900. Furthermore, the second partition wall 911b (refer to...) Figure 18 The second upward guide 1051 extends axially along the second upward guide 1051. That is, after the washing water W2 moves upward along the second upward guide 1051, it passes through the second partition wall 911b (see reference). Figure 18 The composite filter element 900 is smoothly moved to the washing water discharge port 940, thereby ensuring the operational reliability of the composite filter element 900. Furthermore, the second upper cover component 1050 includes a downwardly extending second downward guide 1052. The second downward guide 1052 is formed in a manner that surrounds and is spaced apart from the first downward guide 1042. That is, a flow path for the washing water flowing through the first discharge channel 1101 is formed between the first downward guide 1042 and the second downward guide 1052. At this time, the upper part of the first main body component 1030 is disposed between the first downward guide 1042 and the second downward guide 1052.

[0313] In addition, such as Figure 19 and Figure 20As shown, in the filter section 1000 of the composite filter element according to another embodiment of the present invention, the first lower cover component 1060 includes a third upward guide 1061 extending upward. The third upward guide 1061 surrounds the lower part of the first filter element component 1010 and engages with the first filter element component 1010, thereby stably fixing the first lower cover component 1060 to the first filter element component 1010. Furthermore, the first lower cover component 1060 includes a first lower cover guide 1062 extending downward through the second filter element component 1020. The outer diameter of the first lower cover guide 1062 is smaller than the inner diameter of the second filter element component 1020. Furthermore, the first purified water C1 flowing through the first filter element 1010 moves along the inner side of the first lower cover guide 1062 to the lower part of the second filter element 1020, thereby preventing the first purified water C1 from mixing with the second purified water C2 flowing through the second filter element 1020, thus ensuring the operational stability of the composite filter element 900.

[0314] In addition, such as Figure 19 and Figure 20 As shown, in the filter section 1000 of the composite filter element according to another embodiment of the present invention, the third upper cover component 1080 includes an upper cover guide 1082 that extends downward in conjunction with the second filter element component 1020. Furthermore, the upper cover guide 1082 is formed to surround the upper part of the second filter element component 1020, such that the third upper cover component 1080 is stably fixed to the second filter element component 1020 by the upper cover guide 1082. The third upper cover component 1080 also includes an upper cover support component 1081 that extends upward. The upper cover support component 1081 is formed such that the first lower cover component 1060 and the third upper cover component 1080 are spaced apart from each other. Therefore, the second purified water C2 flowing through the second filter element 1020 moves through the upper part of the third cover element 1080, thereby forming an independent flow path that prevents the second purified water C2 from mixing with the first purified water C1 and from moving to the upper part of the composite filter element 900, thereby improving user satisfaction by ensuring the quality of the purified water.

[0315] like Figure 19 and Figure 20As shown, in another embodiment of the present invention, the filter section 1000 of the composite filter element further includes a second lower cover component 1090, which is coupled to the lower side of the second filter element component 1020. Furthermore, the second lower cover component 1090 includes a second lower cover guide 1091 extending upwardly in conjunction with the second filter element component 1020. The second lower cover guide 1091 contacts the lower outer peripheral surface of the second filter element component 1020, thereby stably fixing the second filter element component 1020 and improving the durability of the composite filter element 900. Thus, the second lower cover component 1090 and the third upper cover component 1080 together stably fix the second filter element component 1020, thereby enabling modularity of the composite filter element 900 through a sub-assembly process, thereby improving workability. Furthermore, a lower leg 1092 extending downward toward the lower side of the second main body component 1070 is provided on the second lower cover component 1090. The lower leg 1092 is formed such that the second lower cover component 1090 is spaced apart from the second main body component 1070. Moreover, the second lower cover component 1090 is spaced apart from the second main body component 1070 by the lower leg 1092, thereby ensuring the operational stability of the composite filter element 900 after the first purified water C1 flowing through the first lower cover component 1060 moves along the lower part of the second filter element component 1020.

[0316] In addition, such as Figure 19 and Figure 20 As shown, the second filter element component 1020, the third upper cover component 1080, and the second lower cover component 1090 are installed on the second main body component 1070, thereby realizing the modularity of the composite filter element 900 and improving workability.

[0317] In addition, such as Figure 19 and Figure 20 As shown, in the filtration section 1000 of the composite filter element according to another embodiment of the present invention, a first O-ring 1201 is formed between the first upper cover component 1040 and the first filter element component 1010. The first O-ring 1201 is used to prevent the washing water W2 from flowing back into the first filter element component 1010. The first O-ring 1201 is made of rubber or silicone material. However, the first O-ring 1201 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the first O-ring 1201 prevents the washing water W2 moving through the first discharge channel 1101 from flowing back into the first filter element component 1010 by sealing between the first filter element component 1010 and the first upper cover component 1040.

[0318] In addition, such as Figure 19 and Figure 20 As shown, in the filter section 1000 of the composite filter element of another embodiment of the present invention, a second O-ring 1202 is formed between the second upper cover component 1050 and the first main body component 1030. The second O-ring 1202 is used to prevent the washing water W2 from mixing with the second purified water C2. The second O-ring 1202 is made of rubber or silicone material. However, the second O-ring 1202 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the second O-ring 1202 prevents the second purified water C2 from flowing into the first discharge channel 1101 or the second discharge channel 1102 by sealing the space between the second upper cover component 1050 and the first main body component 1030.

[0319] In addition, such as Figure 19 and Figure 20 As shown, in the filtration section 1000 of the composite filter element according to another embodiment of the present invention, a third O-ring 1203 is formed between the first filter element component 1010 and the first lower cover component 1060. The third O-ring 1203 is used to prevent the washing water from flowing into the second filter element component 1020. The third O-ring 1203 is made of rubber or silicone material. However, the third O-ring 1203 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the third O-ring 1203 prevents the second purified water C2 from mixing with the washing water W2 by sealing between the first filter element component 1010 and the first lower cover component 1060, thereby ensuring the operational stability of the composite filter element 900.

[0320] In addition, such as Figure 19 and Figure 20 As shown, in the filtration section 1000 of the composite filter element according to another embodiment of the present invention, a fourth O-ring 1204 is formed between the first main body component 1030 and the first lower cover component 1060. The fourth O-ring 1204 is used to prevent the washing water W2 from mixing with the second purified water C2. The fourth O-ring 1204 is made of rubber or silicone material. However, the fourth O-ring 1204 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the fourth O-ring 1204 prevents the second purified water C2 from moving to the first discharge channel 1101 by sealing between the first main body component 1030 and the first lower cover component 1060, thereby ensuring the operational stability of the composite filter element 900.

[0321] In addition, such as Figure 19 and Figure 20As shown, in the filtration section 1000 of the composite filter element according to another embodiment of the present invention, a fifth O-ring 1205 is formed between the second main body component 1070 and the third upper cover component 1080. The fifth O-ring 1205 is used to prevent the second purified water C2 from flowing back into the second filter element component 1020. The fifth O-ring 1205 is made of rubber or silicone material. However, the fifth O-ring 1205 is not limited to being made of rubber or silicone material, and can also be made of various elastic materials. Moreover, the fifth O-ring 1205 prevents the first purified water C1 and the second purified water C2 from mixing by sealing between the second main body component 1070 and the third upper cover component 1080, thereby ensuring the operational stability of the composite filter element 900.

[0322] In addition, such as Figure 19 and Figure 20 As shown, in the filter section 1000 of the composite filter element according to another embodiment of the present invention, a first spacer 1211 is provided between the first upper cover component 1040 and the first main body component 1030 to separate them from each other at a certain interval. Thus, the first spacer 1211 prevents the first discharge channel 1101 and the second discharge channel 1102 from blocking each other. Furthermore, the elasticity of the first O-ring 1201 is provided by applying pressure to the first spacer 1211 towards the first main body component 1030, thereby stably fixing the first upper cover component 1040 between the first filter element component 1010 and the first main body component 1030 by the first spacer 1211 and the first O-ring 1201.

[0323] In addition, such as Figure 19 and Figure 20 As shown, in the filter section 1000 of the composite filter element of another embodiment of the present invention, the second upper cover component 1050 and the housing component 912 (see reference) Figure 21 A second spacer 1212 is provided between the second cover member 1050 and the housing member 912 (see reference 1050) to separate them at a certain interval. Thus, the second spacer 1212 prevents the second cover member 1050 from contacting the housing member 912 (see reference 1050). Figure 21 The space between the components is blocked, causing the purified water C to flow along the housing component 912 (see reference). Figure 21 The second O-ring 1202 moves smoothly inside the housing component 912. Furthermore, the elasticity of the second O-ring 1202 causes the second spacer 1212 to move smoothly towards the housing component 912 (see reference). Figure 21 The second cover component 1050 is provided by pressurization, thereby being stably fixed to the housing component 912 (see reference 1202) by the second spacer 1212 and the second O-ring 1202. Figure 21 () and the aforementioned first main component 1030.

[0324] Figure 21 This is a cross-sectional view showing the state in which the filter portion of the composite filter element according to another embodiment of the present invention is disposed in the outer shell.

[0325] Figure 21 As shown, the raw water flows into port 520 (refer to the above). Figure 18 The raw water W1 flowing in moves through the first upper cover component 1040 to the first filter element component 1010. Furthermore, the first purified water C1 flowing through the first filter element component 1010 moves through the first lower cover component 1060 to the lower part of the second filter element component 1020. At this time, a first purified water flow path 1121 for the movement of the first purified water C1 is formed between the second main body component 1070 and the second filter element component 1020. The first purified water C1 moves along the first purified water flow path 1121 and flows into the second filter element component 1020. Furthermore, a second purified water flow path 1122 for the movement of the second purified water C2 is formed between the second filter element component 1020 and the first lower cover component 1060. The second purified water C2 flowing through the second filter element 1020 moves upward along the second purified water flow path 1122 and then between the third upper cover component 1080 and the first lower cover component 1060. Furthermore, a third purified water flow path 1123 is formed between the housing component 912 and the first main body component 1030, through which the second purified water C2 moves. The second purified water C2 moves upward along the third purified water flow path 1123.

[0326] As described above, in another embodiment of the composite filter element 900 of the present invention, the inlet of the raw water W1, the outlet of the purified water C, and the outlet of the washing water W2 are formed by an independent flow path at the top. Furthermore, the first upper cover component 1040, the second upper cover component 1050, the first lower cover component 1060, and the third upper cover component 1080 are assembled in a stacked structure with the first filter element component 1010 and the second filter element component 1020. Thus, the composite filter element is modularized, and the user does not need to operate the additional structure for washing, thereby improving user convenience.

[0327] Figure 22 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0328] like Figure 22As shown, another embodiment of the water purifier 1200 of the present invention includes: a raw water supply unit 1210 for controlling the supply of raw water W1; a composite filter element 900 for receiving the raw water W1 from the raw water supply unit 1210 and filtering it; a purified water discharge unit 1220 for controlling the discharge of purified water C filtered by the composite filter element 900; and a washing module 1230 disposed between the raw water supply unit 1210 and the composite filter element 900, and controlling the supply of washing water W2 to the composite filter element 900, wherein the raw water W1 and the washing water W2 are selectively supplied to the composite filter element 900.

[0329] At this time, the raw water supply unit 1210 controls the supply of raw water W1, thereby preventing excessive supply of raw water W1 to the composite filter element 900 to prevent damage to the composite filter element 900 due to the raw water W1, and preventing insufficient supply of raw water W1 to the composite filter element 900 to prevent a decrease in the flow of raw water W1 inside the composite filter element 900, thereby ensuring the operational stability of the water purifier. Furthermore, the purified water discharge unit 1220 controls the discharge of purified water C, thereby extracting purified water in a manner that meets user needs, thereby improving user satisfaction.

[0330] Moreover, such as Figure 22 As shown, in another embodiment of the water purifier 1200 of the present invention, the composite filter element 900 is the same as that in the aforementioned embodiment. However, the composite filter element 900 is not limited to the aforementioned composite filter element, and can also be adapted to a structure that separately realizes raw water inlet, purified water outlet and washing water discharge.

[0331] And, as Figure 22As shown, in another embodiment of the water purifier 1200 of the present invention, the washing module 1230 includes a washing water control valve 1231, which controls the supply of washing water W2 using the raw water from the raw water supply unit 1210. The washing water control valve 1231 controls the supply of raw water W1 to either the composite filter element 900 or the washing module 1230. Specifically, the washing water control valve 1231 controls the supply of raw water W1 to the composite filter element 900 and also controls the supply of raw water W1 to the washing module 1230; conversely, the washing water control valve 1231 controls the supply of raw water W1 to either the composite filter element 900 or the washing module 1230. Furthermore, the washing module 1230 performs the function of sterilizing the raw water W1 received from the raw water supply unit 1210. That is, the washing module 1230 can be a sterilization device for sterilizing the raw water W1. For example, the washing module 1230 can use ultrasound or plasma to sterilize the raw water W1 or add a sterilizing agent. In addition, it can be used in various ways to sterilize the raw water W1 and wash the composite filter element 900. The washing water W2 from the washing module 1230 moves to the composite filter element 900, washes the composite filter element 900, and is then discharged to the outside through the washing water discharge valve 1250.

[0332] Moreover, refer to Figure 22 The water extraction process and the washing process of the composite filter element 900 will be described below. First, to extract purified water, the raw water supply unit 1210 opens the flow path of the raw water W1 to supply it to the composite filter element 900. At this time, the washing water control valve 1231 controls the flow of the raw water W1 to the composite filter element 900 by opening its flow path, and closes the flow path of the raw water W1 to the washing module 1230. Furthermore, as the raw water W1 flows through the composite filter element 900, the composite filter element 900 generates purified water C. The purified water C is then extracted to the outside through the purified water discharge unit 1220. At this time, the washing water discharge valve 1250 closes the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0333] Subsequently, in order to wash the composite filter element 900, the raw water supply unit 1210 opens the flow path of the raw water W1 to supply the raw water W1 to the washing module 1230. At this time, the washing water control valve 1231 controls the flow of the raw water W1 to the washing module 1230 by opening the flow path of the washing water W2, and closes the flow path of the raw water W1 to the composite filter element 900. Moreover, the washing module 1230 supplies the washing water W2 to the composite filter element 900. As the washing water W2 flows through the composite filter element 900, the composite filter element 900 is washed by the washing water W2. Moreover, the washing water W2 is discharged to the outside through the washing water discharge valve 1250. At this time, the purified water discharge unit 1220 closes the flow path of the purified water C, thereby ensuring the operational stability for washing the composite filter element 900.

[0334] Figure 23 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0335] like Figure 23 As shown, another embodiment of the water purifier 1300 of the present invention includes a raw water supply unit 1210, a composite filter element 900, a purified water discharge unit 1220, a purified water storage tank 1240, and a washing module 1230. Descriptions of components that are the same as or similar to those in the foregoing embodiments are replaced by the foregoing descriptions, with a focus on the purified water storage tank 1240 and the washing module 1230. The purified water storage tank 1240 is connected to the purified water discharge unit 1220. The purified water discharge unit 1220 includes a first control valve 1221, which controls the supply of purified water C filtered by the composite filter element 900 to the purified water storage tank 1240. Furthermore, the purified water C is extracted to the outside by the control of the purified water discharge unit 1220, or moved to the purified water storage tank 1240 by the control of the first control valve 1221.

[0336] Moreover, such as Figure 23As shown, in another embodiment of the water purifier 1300 of the present invention, the washing module 1230 includes a washing water control valve 1233, which controls the supply of washing water W2 using purified water received from the purified water storage tank 1240. When the washing water control valve 1233 opens the flow path of the purified water C, the purified water C moves to the washing module 1230 and is used as the washing water W2. At this time, a second control valve 1232 is provided in the flow path of the raw water W1. The washing water W2 flowing through the washing module 1230 moves to the second control valve 1232 disposed in the flow path of the raw water W1. The second control valve 1232 is controlled to terminate the supply of the raw water W1 and supply the washing water W2 to the composite filter element 900, or conversely, to supply the raw water W1 to the composite filter element 900 and terminate the supply of washing water W2.

[0337] Moreover, refer to Figure 23 The water extraction process and the washing process of the composite filter element 900 will be described below. First, to extract purified water, the raw water supply unit 1210 opens the flow path of the raw water W1 to supply it to the composite filter element 900. At this time, the second control valve 1232 controls the flow of the raw water W1 to the composite filter element 900 by opening its flow path, and closes the flow path of the washing water W2 to the composite filter element 900. Furthermore, as the raw water W1 flows through the composite filter element 900, the composite filter element 900 generates purified water C. The purified water C is then extracted to the outside or moved to the purified water storage tank 1240 under the control of the purified water discharge unit 1220. At this time, the washing water control valve 1233 and the washing water discharge valve 1250 close the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0338] Subsequently, in order to wash the composite filter element 900, the washing water control valve 1233 is controlled to open the flow path of the washing water W2, thereby allowing the purified water C to move to the washing module 1230. Furthermore, the washing module 1230 supplies the washing water W2 to the second control valve 1232. At this time, the second control valve 1232 closes the flow path of the raw water W1 and opens the flow path of the washing water W2 to the composite filter element 900. As the washing water W2 flows through the composite filter element 900, the composite filter element 900 is washed by the washing water W2. Moreover, the washing water W2 is discharged to the outside through the washing water discharge valve 1250. At this time, the purified water discharge section 1220 closes the flow path of the purified water C, thereby ensuring the operational stability for washing the composite filter element 900.

[0339] Figure 24 The following is a structural diagram of a water purifier according to another embodiment of the present invention.

[0340] like Figure 24 As shown, another embodiment of the water purifier 1400 of the present invention includes a raw water supply unit 1210, a composite filter element 900, a purified water discharge unit 1220, a purified water storage tank 1241, and a washing module 1230. Descriptions of components that are the same as or similar to those in the foregoing embodiments are replaced by the foregoing descriptions; the purified water storage tank 1241 and the washing module 1230 will be described with emphasis. The purified water storage tank 1241 is disposed between the composite filter element 900 and the purified water discharge unit 1220, and is connected to the purified water discharge unit 1220. Purified water C filtered by the composite filter element 900 is supplied to the purified water storage tank 1241. Furthermore, the purified water C is extracted to the outside under the control of the purified water discharge unit 1220.

[0341] Moreover, such as Figure 24 As shown, in another embodiment of the water purifier 1400 of the present invention, the washing module 1230 includes a washing water control valve 1234, which controls the supply of washing water W2 using purified water received from the purified water storage tank 1241. When the washing water control valve 1234 opens the flow path for the purified water C, the purified water C moves to the washing module 1230 and is used as the washing water W2. At this time, a control valve 801a is provided in the flow path for the raw water W1. The washing water W2 flowing through the washing module 1230 moves to the control valve 1215 disposed in the flow path for the raw water W1. The control valve 1215 is controlled to terminate the supply of the raw water W1 and supply the washing water W2 to the composite filter element 900, or conversely, to supply the raw water W1 to the composite filter element 900 and terminate the supply of the washing water W2.

[0342] Moreover, refer to Figure 24The water extraction process and the washing process of the composite filter element 900 will be described below. First, to extract purified water, the raw water supply unit 1210 opens the flow path of the raw water W1 to supply it to the composite filter element 900. At this time, the control valve 1215 controls the flow of the raw water W1 to the composite filter element 900 by opening its flow path, and closes the flow path of the washing water W2 to the composite filter element 900. Furthermore, as the raw water W1 flows through the composite filter element 900, the composite filter element 900 generates purified water C. After the purified water C is stored in the purified water storage tank 1241, it is extracted to the outside under the control of the purified water discharge unit 1220. At this time, the washing water control valve 1234 and the washing water discharge valve 1250 close the flow path of the washing water W2, thereby ensuring the operational stability of the purified water extraction.

[0343] Subsequently, in order to wash the composite filter element 900, the purified water discharge section 1220 closes the flow path of the purified water C to prevent the purified water C from being discharged to the outside. At this time, the washing water control valve 1234 controls the flow path of the washing water W2 to allow the purified water C to move to the washing module 1230. Moreover, the washing module 1230 supplies the washing water W2 to the control valve 1215. At this time, the control valve 1215 closes the flow path of the raw water W1 and opens the flow path of the washing water W2 to the composite filter element 900. As the washing water W2 flows through the composite filter element 900, the composite filter element 900 is washed by the washing water W2. Moreover, the washing water W2 is discharged to the outside through the washing water discharge valve 1250. As described above, by using the purified water C as the washing water W2, the washing efficiency of the composite filter element 900 is improved.

[0344] As described above, preferred embodiments of the present invention have been presented. In addition to the embodiments described above, the present invention may be embodied in other specific forms without departing from its spirit or scope, as will be apparent to those skilled in the art. Therefore, the above embodiments are not limiting but illustrative, and thus the present invention is not limited to the above description, but may be modified within the scope of the appended claims and their equivalents.

Claims

1. A composite filter element, characterized in that, include: The outer casing includes a raw water inlet port, a purified water outlet port, and a washing water outlet port. The raw water inlet port allows raw water to enter, the purified water outlet port allows filtered purified water to exit, and the washing water outlet port discharges washing water. The filtration unit includes a first filter element and a second filter element. The first filter element filters the raw water to generate first purified water, and the second filter element filters the first purified water to generate second purified water. The filter elements are arranged to surround the first filter element. The aforementioned outer casing includes: The head assembly includes a first partition wall and a second partition wall. The first partition wall prevents the raw water from mixing with the washing water, and the second partition wall prevents the second purified water from mixing with the washing water. The housing component extends from the head component and has the filter section disposed inside it. The above-mentioned filter section includes: The main component is disposed between the first filter element component and the second filter element component; The first upper cover component has the aforementioned first filter element component disposed on its lower side, and the aforementioned first filter element component is disposed on the inner side of the aforementioned main body component; The second upper cover component has the aforementioned first upper cover component disposed on its lower side; and The third upper cover component has the second filter element component disposed on its lower side and on the upper side of the second upper cover component, and the second filter element component is disposed on the outer side of the main body component.

2. The composite filter element according to claim 1, characterized in that, After the washing water washes the first filter element, it flows through the first discharge channel formed between the first filter element and the main body and moves to the washing water discharge port.

3. The composite filter element according to claim 1, characterized in that, The aforementioned filter section also includes a lower cover component that is combined with the lower side of the aforementioned second filter element component. The aforementioned lower cover component includes a support guide that extends upward in combination with the aforementioned second filter element component.

4. The composite filter element according to claim 2, characterized in that, On the side of the aforementioned first filter element component, a plurality of discharge holes are formed that communicate with the aforementioned first discharge channel. The washing water used to wash the first filter element moves to the first discharge channel through the plurality of discharge holes. A second discharge channel, which communicates with the first discharge channel, is formed between the first upper cover component and the second upper cover component. The second discharge channel is connected to the washing water discharge port.

5. A water purifier, characterized in that, include: The composite filter element as described in claim 1; The raw water supply department controls the supply of raw water to the aforementioned composite filter cartridges; A purified water discharge section controls the discharge of purified water filtered by the aforementioned composite filter element; and A washing module, located between the raw water supply unit and the composite filter element, controls the supply of washing water to the composite filter element. The aforementioned raw water and washing water are selectively supplied to the aforementioned composite filter element.

6. The water purifier according to claim 5, characterized in that, The washing module uses raw water supplied from the raw water supply unit to wash the composite filter element.

7. A composite filter element, characterized in that, include: The outer casing includes a raw water inlet port, a purified water outlet port, and a washing water outlet port. The raw water inlet port allows raw water to enter, the purified water outlet port allows filtered purified water to exit, and the washing water outlet port discharges washing water. The filtration unit includes a first filter element and a second filter element. The first filter element filters the raw water to generate first purified water, and the second filter element filters the first purified water to generate second purified water. The filter elements are stacked on top of the first filter element. The aforementioned outer casing includes: The head assembly includes a first partition wall and a second partition wall. The first partition wall prevents the second purified water from mixing with the washing water, and the second partition wall prevents the raw water from mixing with the washing water. The housing component extends from the head component and has the filter section disposed inside it. The above-mentioned filter section includes: The first upper cover component has the aforementioned first filter element component disposed on its lower side; The second upper cover component has the first upper cover component disposed on its lower side and has holes formed for moving the washing water. The third upper cover component has the aforementioned second filter element component disposed on its lower side; The fourth upper cover component has the aforementioned third upper cover component disposed on its lower side; and The fifth top cover component has the aforementioned fourth top cover component disposed on its lower side.

8. The composite filter element according to claim 7, characterized in that, The aforementioned filter section also includes a lower cover component that is combined with the lower side of the aforementioned second filter element component. The aforementioned lower cover component includes a lower cover guide that extends upward in combination with the aforementioned second filter element component.

9. The composite filter element according to claim 7, characterized in that, The aforementioned first top cover component includes a first upward guide member that extends upward in order to allow the aforementioned first purified water to flow into the aforementioned second filter element component. The second top cover component includes a second upward guide member that extends upward in a manner that allows the washing water to be discharged from the first filter element component. The aforementioned third top cover component includes a top cover guide that extends downward in conjunction with the aforementioned second filter element component. The aforementioned fourth top cover component includes a fourth upward guide member that extends upward in a manner that allows the second purified water to be discharged from the second filter element component to the outside. The aforementioned fifth top cover component includes a fifth upward guide member that extends upward in a manner that allows the aforementioned washing water to be discharged to the outside.

10. The composite filter element according to claim 8, characterized in that, After the washing water washes the first filter element, it flows through the first discharge channel formed between the first filter element and the second upper cover element, and moves to the washing water discharge port. On the side of the aforementioned first filter element component, a plurality of discharge holes are formed that communicate with the aforementioned first discharge channel. The washing water used to wash the first filter element moves to the first discharge channel through the plurality of discharge holes.

11. The composite filter element according to claim 10, characterized in that, A second discharge channel, which communicates with the first discharge channel, is formed between the fourth upper cover component and the fifth upper cover component. The second discharge channel is connected to the washing water discharge port.

12. A water purifier, characterized in that, include: The composite filter element as described in claim 7; The raw water supply department controls the supply of raw water to the aforementioned composite filter cartridges; A purified water discharge section controls the discharge of purified water filtered by the aforementioned composite filter element; and A washing module, located between the raw water supply unit and the composite filter element, controls the supply of washing water to the composite filter element. The aforementioned raw water and washing water are selectively supplied to the aforementioned composite filter element.

13. The water purifier according to claim 12, characterized in that, The washing module uses raw water supplied from the raw water supply unit to wash the composite filter element.

14. A composite filter element, characterized in that, include: The outer casing includes a raw water inlet port, a purified water outlet port, and a washing water outlet port. The raw water inlet port allows raw water to enter, the purified water outlet port allows filtered purified water to exit, and the washing water outlet port discharges washing water. The filtration unit includes a first filter element and a second filter element. The first filter element filters the raw water to generate first purified water, and the second filter element filters the first purified water to generate second purified water. The filter elements are stacked on the lower part of the first filter element. The aforementioned outer casing includes: The head assembly includes a first partition wall and a second partition wall. The first partition wall prevents the raw water from mixing with the washing water, and the second partition wall prevents the purified water from mixing with the washing water. The housing component extends from the head component and has the filter section disposed inside it. The above-mentioned filter section includes: The first main body component surrounds the aforementioned first filter element component; The first upper cover component has the aforementioned first filter element component disposed on its lower side; The second upper cover component has the first upper cover component disposed on its lower side, and the first main body component disposed on its lower side; The first lower cover component has the aforementioned first filter element component disposed on its upper side and passes through the aforementioned second filter element component; The second main body component surrounds the aforementioned second filter element component; and The third upper cover component has the aforementioned second filter element component disposed on its lower side.

15. The composite filter element according to claim 14, characterized in that, The aforementioned filter section also includes a second lower cover component that is combined with the lower side of the aforementioned second filter element component. The aforementioned second lower cover component includes a second lower cover guide that extends upward in combination with the aforementioned second filter element component.

16. The composite filter element according to claim 14, characterized in that, The aforementioned first top cover component includes a first upward guide member that extends upward in order to allow the raw water to flow into the aforementioned second filter element component. The second top cover component includes a second upward guide member that extends upward in a manner that allows the washing water to be discharged from the first filter element component. The aforementioned first lower cover component includes a first lower cover guide that extends downward through the aforementioned second filter element component. The aforementioned third cover component includes a cover guide that extends downward in combination with the aforementioned second filter element component.

17. The composite filter element according to claim 14, characterized in that, After the washing water washes the first filter element, it flows through the first discharge channel formed between the first filter element and the first main body component, and moves to the washing water discharge port. On the side of the aforementioned first filter element component, a plurality of discharge holes are formed that communicate with the aforementioned first discharge channel. The washing water used to wash the first filter element moves to the first discharge channel through the plurality of discharge holes.

18. The composite filter element according to claim 17, characterized in that, A second discharge channel, which communicates with the first discharge channel, is formed between the first upper cover component and the second upper cover component. The second discharge channel is connected to the washing water discharge port.

19. A water purifier, characterized in that, include: The composite filter element as described in claim 14; The raw water supply department controls the supply of raw water; The purified water discharge section controls the discharge of purified water filtered by the composite filter element, and supplies raw water to the composite filter element; and A washing module, located between the raw water supply unit and the composite filter element, controls the supply of washing water to the composite filter element. The aforementioned raw water and washing water are selectively supplied to the aforementioned composite filter element.

20. The water purifier according to claim 19, characterized in that, The washing module uses raw water supplied from the raw water supply unit to wash the composite filter element.

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