Water purifier

Abstract

To provide a water purifier with washable filter members.SOLUTION: A water purifier includes: a filter member having an inflow part where raw water flows in, a first filter part that filters raw water flowing in through the inflow part to provide first filtered water, a second filter part that re-filters the first filtered water to provide second filtered water, a first discharge part that discharges the first filtered water, and a second discharge part that discharges the second filtered water; a raw water storage part for storing raw water; a flow channel providing passages for raw water, first filtered water, and second filtered water to flow; a valve part including one or more valve modules selectively opened or closed to regulate the flow of raw water, first filtered water, and second filtered water within the flow channel; a sterilization module that sterilizes the first filtered water discharged from the first discharge part and the second filtered water discharged from the second discharge part; and a controller that controls the opening and closing of the valve module based on multiple flow modes and controls the sterilization module, in which the multiple flow modes include a raw water sterilization mode that sterilizes the raw water in the raw water storage part.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a water purifier. [Background technology]

[0002] In general, a water purifier is a device that receives raw water from a raw water supply source such as a water supply system, filters it using an internal filter, and then provides the purified water to a user. The purified water can be provided to a user as cold water cooled to a predetermined temperature or hot water heated to a predetermined temperature or above by the water purifier.

[0003] Such conventional water purifiers may include a raw water tank for storing raw water, an RO (Reverse Osmosis) filter for filtering the raw water, and a storage tank for storing purified water filtered by the RO filter. The RO filter may include a non-filtration section into which the raw water can flow, a reverse osmosis membrane for filtering the raw water, and a filtration section in which purified water filtered by the reverse osmosis membrane is stored. In other words, a portion of the raw water is filtered by the reverse osmosis membrane to become purified water and stored in the filtration section, and the remaining portion is stored in the non-filtration section as concentrated water containing impurities.

[0004] Meanwhile, water purifiers are generally used by connecting them to water pipes. However, when connecting to a water pipe is difficult or the water purifier needs to be portable, install-free water purifiers are used, which have a water tank for storing raw water and do not require connection to a water pipe. In other words, such install-free water purifiers are supplied with raw water from a water tank rather than directly from a water pipe. Furthermore, there is a problem in that the longer the raw water remains in the water tank, the more likely it is to become contaminated.

[0005] In this regard, the applicant's Korean Patent Publication No. 10-2016-0005319, "Water Purifier Capable of Recycling Domestic Water" (Patent Document 1), discloses a water purifier including a water supply tank for storing raw water and domestic water, a reverse osmosis filter unit for filtering raw water and discharging domestic water, and a purified water tank for storing purified water filtered by the reverse osmosis filter unit.

[0006] However, in Patent Document 1, raw water from the water supply tank is filtered into purified water by a reverse osmosis filter and supplied to the purified water tank only when the water level in the purified water tank becomes low and purified water needs to be replenished, so the raw water from the water supply tank and the purified water from the purified water tank are not circulated separately.In other words, if the water level in the purified water tank is maintained for a long time, the raw water and purified water are stored in the water supply tank and the purified water tank for a long time, which creates a problem that they may become contaminated.

[0007] Furthermore, the domestic water disclosed in Patent Document 1 contains impurities, and when the domestic water flows into the water supply tank, there is a problem in that it may further contaminate the raw water in the water supply tank.

[0008] In addition, the applicant's Korean Patent Publication No. 10-2013-0077383 "Water Purifier" (Patent Document 2) discloses a water purifier including a filter unit that purifies water through reverse osmosis, a main tank that stores purified water that has passed through the filter unit, and a water supply tank that supplies purified water and stores domestic water discharged from the filter unit.

[0009] However, in Patent Document 2, the water in the water supply tank is filtered by a reverse osmosis filter and supplied to the main tank as purified water only when the main tank needs to be replenished with purified water, and the water in the water supply tank and the purified water in the purified water tank are not circulated separately. In other words, when the main tank does not need to be replenished with purified water, the water and purified water are stored in the water supply tank and the main tank for a long time, which creates a problem that they may become contaminated.

[0010] Furthermore, the domestic water in Patent Document 2 contains impurities, and when the domestic water flows into the water supply tank, there is a problem in that it may further contaminate the raw water in the water supply tank. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Korean Patent Publication No. 10-2016-0005319 (Published on January 14, 2016) [Patent Document 2] Korean Patent Publication No. 10-2013-0077383 (Published on July 9, 2013) Summary of the Invention [Problem to be solved by the invention]

[0012] One embodiment of the present invention has been invented with the above-mentioned background in mind, and aims to provide a water purifier that can circulate raw water stored in a raw water storage section and purified water stored in a purified water storage section.

[0013] Another object of the present invention is to provide a water purifier that can prevent the raw water in the raw water storage section from being contaminated when the raw water is circulated within the water purifier.

[0014] Another object of the present invention is to provide a water purifier whose filter member can be washed. [Means for solving the problem]

[0015] According to one aspect of the present invention, there is provided an RO filter including a non-filtration section into which raw water flows, a filtration section that discharges purified water, and a reverse osmosis membrane that separates the non-filtration section from the filtration section and filters the raw water into the purified water; a purified water storage section that stores the purified water; a raw water storage section that stores the raw water; a flow channel that provides a passage through which the raw water and the purified water flow; a valve section that includes one or more valve modules that are selectively opened and closed to adjust the flow of the raw water and the purified water in the flow channel; a sterilization module that sterilizes the raw water discharged from the non-filtration section; and a reverse osmosis membrane that filters the raw water into the purified water. and a controller that controls opening and closing of the valve module based on the flow rate and controls the sterilization module, wherein the plurality of flow modes includes a flushing mode in which the reverse osmosis membrane is washed with the purified water from the purified water storage unit, and the controller opens and closes the one or more valve modules in the flushing mode so that the purified water discharged from the purified water storage unit flows into the non-filtration unit and flushing discharge water discharged from the non-filtration unit flows toward the raw water storage unit, and drives the sterilization module to sterilize the flushing discharge water.

[0016] The system may further include a filter module including a pre-treatment filter that pre-treats raw water supplied to the RO filter, and the plurality of flow modes may further include a raw water sterilization mode that sterilizes the raw water stored in the raw water storage unit, and the controller may drive the sterilization module by opening and closing the one or more valve modules in the raw water sterilization mode so that the raw water flows into the non-filtration unit via the pre-treatment filter and the raw water discharged from the non-filtration unit flows into the raw water storage unit.

[0017] In addition, the controller may open or close the one or more valve modules in the raw water sterilization mode so that the purified water discharged from the filtration unit flows into the purified water storage unit.

[0018] The plurality of flow modes further includes a purified water circulation mode in which the purified water stored in the purified water storage unit circulates through a flow channel, and the controller may open or close the one or more valve modules in the purified water circulation mode so that the purified water stored in the purified water storage unit and the raw water stored in the raw water storage unit flow into the non-filtration unit and the purified water discharged from the filtration unit flows into the purified water storage unit.

[0019] In addition, the raw water may be discharged from the non-filtration unit and flow into the raw water storage unit in the purified water circulation mode, and the controller may drive the sterilization module in the purified water circulation mode.

[0020] The water purification system may further include a filter module including a post-treatment filter that post-treats the purified water discharged from the filtration unit, and the purified water may flow into the purified water storage unit via the post-treatment filter in the purified water circulation mode.

[0021] The flow channel may include an RO filter inlet flow path that communicates with the raw water storage unit and provides a path for either the raw water or the purified water to flow into the RO filter; a purified water supply flow path that merges with the RO filter inlet flow path and provides a path for the purified water discharged from the purified water storage unit to flow into the RO filter inlet flow path; a circulation flow path that communicates with the raw water storage unit and provides a path for at least one of the raw water and the domestic water discharged from the non-filtration unit to flow into the raw water storage unit; and a purified water storage flow path that provides a path for the purified water discharged from the filtration unit to flow into the purified water storage unit, and the sterilization module may be disposed in the circulation flow path.

[0022] The purified water storage unit and the raw water storage unit may be formed as separate units.

[0023] The purified water storage unit and the raw water storage unit may be integrally formed.

[0024] According to another embodiment of the present invention, there is provided a filter member including an inlet into which raw water flows, a first filtration unit for filtering the raw water flowing in through the inlet to provide first filtrate, a second filtration unit for re-filtering the first filtrate to provide second filtrate, a first discharge unit for discharging the first filtrate, and a second discharge unit for discharging the second filtrate; a raw water storage unit for storing the raw water; flow channels providing paths through which the raw water, the first filtrate, and the second filtrate flow; a valve unit including one or more valve modules selectively opened and closed to adjust the flows of the raw water, the first filtrate, and the second filtrate in the flow channels; a sterilization module for sterilizing water and the second filtered water discharged from the second outlet; and a controller for controlling opening and closing of the valve module based on a plurality of flow modes to control the sterilization module, wherein the plurality of flow modes include a raw water sterilization mode for sterilizing raw water in the raw water storage unit, and the controller opens and closes the one or more valve modules in the raw water sterilization mode so that the raw water discharged from the raw water storage unit flows into the first filtration unit through the inlet and the first filtered water discharged from the first outlet unit flows into the raw water storage unit via the sterilization module, and the sterilization module sterilizes the first filtered water in the raw water sterilization mode.

[0025] The plurality of flow modes includes a filter cleaning mode for cleaning the filter member, and the controller opens and closes the one or more valve modules in the filter cleaning mode so that the raw water discharged from the raw water storage unit flows into the inlet and the second filtered water discharged from the second outlet flows toward the raw water storage unit, and the sterilization module can sterilize the second filtered water in the filter cleaning mode.

[0026] The system may further include a pump unit for pressurizing the raw water to the inlet, wherein the pump unit pressurizes the raw water with a predetermined first pressure in the raw water sterilization mode so that the raw water flows into the first filtration section through the inlet, and pressurizes the raw water with a predetermined second pressure in the filter cleaning mode so that the raw water passes through the first filtration section through the inlet and flows into the second filtration section, and the second pressure may be greater than the first pressure.

[0027] The flow channel includes a filter inlet flow path connected to the raw water storage unit and the inlet unit, providing a path for the raw water to flow between the raw water storage unit and the inlet unit, and a circulation flow path connected to the first outlet unit and the raw water storage unit, providing a path for the first filtered water discharged from the first outlet unit to flow to the raw water storage unit, and the sterilization module may be provided in the circulation flow path.

[0028] The flow channel further includes a flow passage that merges with the circulation passage and provides a passage for the second filtered water discharged from the second discharge part, and a portion where the flow passage and the circulation passage merge is located between the first discharge part and the sterilization module on the circulation passage, and the second filtered water flowing through the flow passage can flow to the raw water storage part via the circulation passage.

[0029] The first filtering unit may include a nanotrap filter or an electrostatic filter, and the second filtering unit may include a carbon filter. [Effects of the Invention]

[0030] According to one embodiment of the present invention, raw water can be circulated in raw water sterilization mode, thereby enabling efficient management of raw water, and purified water can be circulated in purified water circulation mode, thereby enabling efficient management of purified water.

[0031] Furthermore, since the raw water can be sterilized by the sterilization module, it is possible to prevent the raw water in the raw water storage section from being contaminated.

[0032] Furthermore, in the flushing mode, raw water sterilization mode, and purified water circulation mode, the flushing discharge water or raw water can be sterilized by the sterilization module, so that the raw water in the raw water storage section can be prevented from being contaminated.

[0033] In addition, since the filter member can be washed in the filter washing mode, the filter member can be used cleanly. [Brief explanation of the drawings]

[0034] [Figure 1] 1 is a diagram showing a water purifier according to a first embodiment of the present invention. [Figure 2] 2 is a diagram showing the flow paths of raw water and purified water in the flushing mode in FIG. 1. FIG. [Figure 3] 2 is a diagram showing the flow path of raw water in the raw water sterilization mode in FIG. 1. FIG. [Figure 4] 2 is a diagram showing the flow paths of purified water and raw water in the purified water circulation mode in FIG. 1. FIG. [Figure 5] FIG. 10 is a diagram showing a water purifier according to a second embodiment of the present invention. [Figure 6] FIG. 6 is a diagram showing the flow paths of raw water and purified water in the raw water sterilization mode in FIG. 5. [Figure 7] FIG. 6 is a diagram showing the flow paths of raw water and purified water in the flushing mode in FIG. 5. [Figure 8] FIG. 10 is a diagram showing a water purifier according to a third embodiment of the present invention. [Figure 9] FIG. 9 is a diagram showing the flow paths of raw water and first filtered water in the raw water sterilization mode in FIG. 8. [Figure 10] 9 is a diagram showing flow paths of raw water and second filtered water in the filter cleaning mode in FIG. 8. FIG. [Figure 11] FIG. 9 is a diagram showing flow paths of raw water and second filtered water in the purified water discharge mode in FIG. 8. DETAILED DESCRIPTION OF THE INVENTION

[0035] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments for realizing the technical concept of the present invention will be described in detail with reference to the accompanying drawings.

[0036] In the description of the present invention, if it is determined that a specific description of related publicly known configurations or functions may obscure the gist of the present invention, the detailed description will be omitted.

[0037] Additionally, when a component is referred to as being "connected," "supplied," or "flowing" with another component, it should be understood that the component may be directly connected, supplied, or flowing with the other component, but that other components may also be present in between.

[0038] The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless the context clearly indicates otherwise.

[0039] In addition, unless otherwise specified, expressions such as upper side, lower side, and side are described based on the direction shown in the drawings, and it should be made clear that they may be expressed differently if the orientation of the corresponding object changes. For the same reason, some components are exaggerated, omitted, or shown schematically in the accompanying drawings, and the size of each component does not completely reflect the actual size.

[0040] Furthermore, terms including ordinal numbers such as first, second, etc. may be used to describe various components, but the components are not limited by such terms. These terms are used only to distinguish one component from another.

[0041] As used herein, the meaning of "comprising" embodies certain properties, regions, constants, steps, operations, elements and / or components, and does not exclude the presence or addition of other certain properties, regions, constants, steps, operations, elements, components and / or groups.

[0042] A water purifier 1 according to a first embodiment of the present invention will be described below with reference to the drawings.

[0043] Referring to FIG. 1, a water purifier 1 according to a first embodiment of the present invention can provide clean water to a user by filtering water. For example, the water purifier 1 can filter water that has been stored therein. The water purifier 1 can control the flow of water therein based on a plurality of flow modes. The water purifier 1 can also be an install-free water purifier that does not require connection to a water pipe. The water purifier 1 can include an RO filter 100, a purified water storage unit 200, a raw water storage unit 300, a flow channel 400, a valve unit 500, a sterilization module 600, a pump unit 700, a filter module 800, and a controller 900.

[0044] The RO filter 100 can filter a portion of the raw water flowing into the reverse osmosis filter to provide purified water. In this specification, raw water is defined as water that has not been filtered by the RO filter 100, regardless of filtration by a pre-treatment filter 810 (described below) of the filter module 800, and purified water is defined as water that has been filtered by the RO filter 100, regardless of filtration by a post-treatment filter 820 (described below) of the filter module 800. Furthermore, flushing water is defined as purified water stored in the purified water storage unit 200 for flushing the RO filter 100. Furthermore, flushing discharge water is defined as water that flows into the RO filter 100 and flushes the RO filter 100.

[0045] The RO filter 100 may include a reverse osmosis membrane 110 , a non-filtration section 120 , a filtration section 130 , a filter inlet 140 , a purified water outlet 150 , and a raw water outlet 160 .

[0046] The reverse osmosis membrane 110 separates the non-filtration section 120 and the filtration section 130, and can filter raw water into purified water. That is, a portion of the raw water that flows into the RO filter 100 is filtered by the reverse osmosis membrane 110 and discharged as purified water through the purified water outlet 150, while the remainder that does not pass through the reverse osmosis membrane 110 is discharged through the raw water outlet 160.

[0047] The non-filtration unit 120 is connected to the filter inlet 140 and is a space for accommodating one or more of raw water (inflowing in raw water sterilization mode or purified water circulation mode) and purified water (inflowing in flushing mode or purified water circulation mode) flowing in through the filter inlet 140. The non-filtration unit 120 may also be connected to the raw water outlet 160. Impurities contained in the raw water may accumulate in the non-filtration unit 120 without passing through the reverse osmosis membrane 110. The raw water containing the impurities accumulated in the non-filtration unit 120 may be discharged to the outside of the RO filter 100 through the raw water outlet 160. A significant amount of impurities that flow into the RO filter 100 are discharged to the outside of the RO filter 100 through the discharge of raw water, but some impurities may be adsorbed to the reverse osmosis membrane 110 and not discharged when the raw water is discharged. The impurities adsorbed to the reverse osmosis membrane 110 may be flushed with the purified water flowing into the non-filtration unit 120 and released from the reverse osmosis membrane 110. In other words, the non-filtration portion 120 and the reverse osmosis membrane 110 can be cleaned by the purified water flowing into the non-filtration portion 120 .

[0048] The filtration unit 130 is a space that accommodates purified water filtered by the reverse osmosis membrane 110. The filtration unit 130 is also connected to the purified water outlet 150, and the purified water in the filtration unit 130 can be discharged to the outside of the RO filter 100 through the purified water outlet 150.

[0049] The filter inlet 140 is a through-hole that connects the non-filtration section 120 to an RO filter inlet flow path 410 (described later) of the flow channel 400. Purified water or raw water flowing through the RO filter inlet flow path 410 can flow into the non-filtration section 120 through the filter inlet 140.

[0050] The purified water outlet 150 is a through-hole for discharging purified water filtered through the reverse osmosis membrane 110 to the outside of the RO filter 100. The purified water in the filtration unit 130 can be discharged through the purified water outlet 150 to a purified water storage flow path 440 of the flow channel 400, which will be described later.

[0051] The raw water outlet 160 is a through-hole for discharging the raw water contained in the non-filtration section 120 into a circulation flow path 430 (described later) of the flow channel 400. The raw water outlet 160 can also discharge flushing effluent that has flushed the reverse osmosis membrane 110 and the non-filtration section 120 so that the flushing effluent flows into the circulation flow path 430. In other words, the raw water or flushing water can be discharged into the circulation flow path 430 through the raw water outlet 160.

[0052] The purified water storage unit 200 can store purified water. The purified water can be discharged to the outside of the water purifier 1 and provided to a user. In addition, the purified water stored in the purified water storage unit 200 can be provided to the non-filtration unit 120 of the RO filter 100 as flushing water through the RO filter inlet flow path 410 of the flow channel 400.

[0053] The raw water storage unit 300 can store raw water. The raw water can be provided to the RO filter 100 through the RO filter inlet flow path 410 of the flow channel 400. The raw water storage unit 300 and the purified water storage unit 200 can be formed separately. In other words, the raw water storage unit 300 and the purified water storage unit 200 can be disposed separately from each other. The raw water storage unit 300 is not connected to a water pipe.

[0054] The flow channel 400 can provide a passageway for raw water and purified water to flow between the purified water reservoir 200, the raw water reservoir 300, and the RO filter 100 via the flow channel 400. The flow channel 400 can also include an RO filter inlet flow path 410, a purified water supply flow path 420, a circulation flow path 430, a purified water storage flow path 440, and a purified water discharge flow path 450.

[0055] The RO filter inlet flow path 410 may provide a passage for water to flow into the non-filtration portion 120 of the RO filter 100. The water flowing through the RO filter inlet flow path 410 may be determined as either raw water or purified water depending on the flow mode (flushing mode, raw water disinfection mode, purified water circulation mode, purified water discharge mode). The RO filter inlet flow path 410 may connect the raw water storage portion 300 and the filter inlet 140 of the RO filter 100. For example, the RO filter inlet flow path 410 may be disposed between the raw water storage portion 300 and the non-filtration portion 120 of the RO filter 100. The RO filter inlet flow path 410 may be divided into a flow path connected to the raw water storage portion 300 and the filter module 800 and a flow path connected to the filter module 800 and the RO filter 100.

[0056] The purified water supply flow path 420 may provide a passage through which purified water discharged from the purified water storage unit 200 can flow. The purified water supply flow path 420 may be connected to the purified water storage unit 200 and merge with the RO filter inlet flow path 410. In other words, purified water flowing through the purified water supply flow path 420 may flow to the RO filter inlet flow path 410. For example, the purified water supply flow path 420 may be disposed between the purified water storage unit 200 and the RO filter inlet flow path 410. Meanwhile, in this embodiment, the purified water supply flow path 420 has been described as merging with the RO filter inlet flow path 410, but it may also be directly connected to the filter module 800 or the filter inlet 140.

[0057] The circulation flow path 430 may provide a passage through which raw water or flushing effluent discharged from the non-filtration section 120 of the RO filter 100 flows. In addition, the circulation flow path 430 may connect the raw water storage section 300 to the raw water outlet 160 of the RO filter 100. The raw water or flushing effluent flowing through the circulation flow path 430 may flow into the raw water storage section 300.

[0058] The purified water storage channel 440 can provide a passage through which purified water discharged from the RO filter 100 can flow. The purified water storage channel 440 can connect the purified water storage unit 200 and the purified water outlet 150 of the RO filter 100. In other words, the purified water flowing through the purified water storage channel 440 can flow into the purified water storage unit 200.

[0059] The purified water discharge flow path 450 may provide a passage for discharging purified water from the purified water storage unit 200 to the outside of the water purifier 1. The purified water discharge flow path 450 may be connected to the purified water storage unit 200. That is, the purified water discharged from the purified water storage unit 200 may be discharged to the outside of the water purifier 1 through the purified water discharge flow path 450.

[0060] The valve unit 500 may include one or more valve modules that are selectively opened and closed to regulate the flow of raw water and purified water within the flow channel 400. For example, if the flow channel 400 includes the RO filter inlet flow path 410, the purified water supply flow path 420, the circulation flow path 430, the purified water storage flow path 440, and the purified water discharge flow path 450, as described above, the valve unit 500 may open and close each flow path included in the flow channel 400 to control the flow of water. As shown in FIG. 1, such one or more valve modules may be three-way valves installed at points where the flow paths branch or merge to allow the flow of raw water and purified water. However, the concept of the present invention is not limited thereto, and a general on-off valve may be installed in each flow path. The one or more valve modules may include a first valve module 510.

[0061] The first valve module 510 can open and close the purified water supply channel 420 so that raw water flows into the RO filter 100 or purified water flows into the RO filter inlet channel 410. That is, the first valve module 510 can close the purified water supply channel 420 to prevent water flowing from the RO filter inlet channel 410 from flowing into the purified water supply channel 420 and to prevent purified water from flowing into the RO filter inlet channel 410. The first valve module 510 can also open the purified water supply channel 420 so that purified water flowing through the purified water supply channel 420 flows into the RO filter 100. For example, the first valve module 510 may be a three-way valve disposed at a point where the RO filter inlet channel 410 and the purified water supply channel 420 converge.

[0062] The sterilization module 600 can sterilize the raw water or flushing discharge water discharged from the non-filtration section 120 and flowing through the circulation flow path 430. In other words, the sterilization module 600 can be disposed in the circulation flow path 430. The sterilization module 600 can sterilize the raw water or flushing discharge water by providing a sterilizing substance for sterilization to the raw water or flushing discharge water or by electrolysis.

[0063] The pump unit 700 can pressurize the raw water so that the raw water passes through the reverse osmosis membrane 110, and can pressurize the purified water to the RO filter 100 or to the outside. Such a pump unit 700 can include a first pump 710 and a second pump 720.

[0064] The first pump 710 can pressurize one or more of the raw water and purified water flowing through the RO filter inlet flow path 410 to the RO filter 100. Furthermore, the first pump 710 can be connected to the RO filter inlet flow path 410 to pressurize the raw water and purified water. Such a first pump 710 can be provided in the RO filter inlet flow path 410 between the first valve module 510 and the pre-treatment filter 810 or between the pre-treatment filter 810 and the RO filter 100.

[0065] The second pump 720 can pressurize the purified water flowing through the purified water discharge flow path 450 so that the purified water flows outside the water purifier 1. The second pump 720 can be provided in the purified water discharge flow path 450.

[0066] The filter module 800 can further filter the raw water or purified water flowing through the water purifier 1. In other words, the filter module 800 can pre-treat the raw water or purified water flowing through the RO filter 100, or post-treat the purified water discharged from the RO filter 100. Such a filter module 800 can include a pre-treatment filter 810 and a post-treatment filter 820.

[0067] The pre-treatment filter 810 can filter the raw water or purified water flowing through the RO filter inlet flow path 410 before it flows into the RO filter 100. For example, the pre-treatment filter 810 can be a carbon filter containing granular activated carbon for filtering the raw water or purified water. Such a pre-treatment filter 810 can be connected to the RO filter inlet flow path 410. For example, the pre-treatment filter 810 can be connected to the RO filter inlet flow path 410 so as to be located between the first valve module 510 and the RO filter 100.

[0068] The post-treatment filter 820 can filter the purified water flowing through the purified water storage flow path 440 before it flows into the purified water storage unit 200. For example, the post-treatment filter 820 can be a carbon filter including granular activated carbon for filtering raw water or purified water. Such a post-treatment filter 820 can be connected to the purified water storage flow path 440. In addition, the post-treatment filter 820 and the pre-treatment filter 810 can be formed as a single integrated filter.

[0069] The controller 900 can control the opening and closing of one or more valve modules based on a plurality of flow modes. The controller 900 can be realized by a computing device including a microprocessor, a memory, etc., and its implementation method is obvious to those skilled in the art, so further detailed description will be omitted. The plurality of flow modes can include a flushing mode, a raw water disinfection mode, a purified water circulation mode, and a purified water discharge mode.

[0070] The flushing mode will be described with reference to FIG. 2. The flushing mode is a mode in which the reverse osmosis membrane 110 can be cleaned with purified water from the purified water storage unit 200. In this flushing mode, the controller 900 can control the opening and closing of the channels of one or more valve modules so that purified water discharged from the purified water storage unit 200 flows into the non-filtration unit 120 of the RO filter 100 and flushing discharge water discharged from the non-filtration unit 120 flows into the raw water storage unit 300. In other words, in the flushing mode, the controller 900 can control the first valve module 510 to open the RO filter inlet channel 410 and the purified water supply channel 420. In addition, in the flushing mode, the purified water can flow into the non-filtration unit 120 via the pre-treatment filter 810.

[0071] In addition, in the flushing mode, the controller 900 can activate the sterilization module 600 to sterilize the flushing discharge water discharged from the non-filtration section 120. In other words, in the flushing mode, the sterilized flushing discharge water can flow into the raw water storage section 300.

[0072] In addition, in the flushing mode, the first pump 710 can pressurize the purified water flowing through the RO filter inlet flow path 410 to the RO filter 100.

[0073] The raw water sterilization mode will be described with reference to Fig. 3. The raw water sterilization mode is a mode for sterilizing raw water stored in the raw water storage unit 300. In such raw water sterilization mode, the controller 900 can open or close one or more valve modules so that raw water flows into the non-filtration unit 120 and raw water discharged from the non-filtration unit 120 flows into the raw water storage unit 300. In other words, in the raw water sterilization mode, the controller 900 can control the first valve module 510 so that the purified water supply flow path 420 is closed. Also, in the raw water sterilization mode, raw water can flow into the non-filtration unit 120 via the pre-treatment filter 810.

[0074] In addition, in the raw water sterilization mode, the controller 900 can drive the sterilization module 600 to sterilize the raw water discharged from the non-filtration unit 120. That is, in the raw water sterilization mode, the raw water stored in the raw water storage unit 300 can be sterilized by the sterilization module 600 and stored in the raw water storage unit 300 again.

[0075] In addition, in the raw water sterilization mode, the first pump 710 can pressurize the raw water flowing through the RO filter inlet flow path 410 to the RO filter 100.

[0076] The purified water circulation mode will be described with reference to FIG. 4. The purified water circulation mode is a mode in which purified water stored in the purified water storage unit 200 is circulated through the flow channel 400. In this purified water circulation mode, the controller 900 can open or close one or more valve modules so that the purified water stored in the purified water storage unit 200 and the raw water stored in the raw water storage unit 300 flow into the non-filtration unit 120, the purified water discharged from the filtration unit 130 flows into the purified water storage unit 200, and the raw water discharged from the non-filtration unit 120 is stored in the raw water storage unit 300. In other words, in the purified water circulation mode, the controller 900 can control the first valve module 510 to open the RO filter inlet flow path 410 and the purified water supply flow path 420. In addition, in the purified water circulation mode, raw water discharged from the raw water storage unit 300 and purified water discharged from the purified water storage unit 200 can flow into the non-filtration unit 120 via the pre-treatment filter 810, and purified water discharged from the filtration unit 130 can flow into the purified water storage unit 200 via the post-treatment filter 820.

[0077] In addition, in the purified water circulation mode, the controller 900 can drive the sterilization module 600 to sterilize the raw water discharged from the non-filtration unit 120. In other words, in the purified water circulation mode, the sterilized raw water can flow into the purified water storage unit 200.

[0078] In addition, in the purified water circulation mode, the first pump 710 can pressurize the purified water and raw water flowing through the RO filter inlet flow path 410 to the RO filter 100.

[0079] The purified water discharge mode will be described below. The purified water discharge mode is a mode in which purified water stored in the purified water storage unit 200 is discharged to the outside of the water purifier 1. In this purified water discharge mode, the controller 900 can control one or more valve modules so that the purified water in the purified water storage unit 200 is discharged to the outside through the purified water discharge flow path 450.

[0080] In addition, in the purified water discharge mode, the second pump 720 can pressurize the purified water flowing through the purified water discharge flow path 450 so that the purified water flows outside the water purifier 1.

[0081] The operation and effects of the water purifier 1 according to the first embodiment of the present invention will be described below.

[0082] The water purifier 1 according to the first embodiment of the present invention can flow raw water and purified water based on a plurality of flow modes, as will be described below.

[0083] In the flushing mode, the reverse osmosis membrane 110 is washed with purified water, thereby preventing impurities from being adsorbed on the reverse osmosis membrane 110 of the RO filter 100. In addition, the flushing discharge water containing impurities can be sterilized by the sterilization module 600 and then flow into the raw water storage unit 300, thereby preventing the raw water from being contaminated.

[0084] In addition, in the raw water sterilization mode, raw water is circulated through the raw water storage unit 300, the pre-treatment filter 810, the RO filter 100, and the raw water storage unit 300 in this order, and is sterilized by the sterilization module 600, thereby preventing contamination of the raw water in the raw water storage unit 300. That is, if the raw water storage unit 300 is installed in an install-free water purifier that does not require a water pipe connection, the raw water in the raw water storage unit 300 can be circulated and sterilized even if the raw water is not supplied through a water pipe.

[0085] In addition, in the purified water circulation mode, purified water can be circulated in the order of the purified water storage unit 200, the pre-treatment filter 810, the RO filter 100, the post-treatment filter 820, and the purified water storage unit 200, thereby preventing the purified water in the purified water storage unit 200 from being contaminated. In addition, in the purified water circulation mode, at least a portion of the raw water can be filtered into purified water by the RO filter 100 and then flowed into the purified water storage unit 200, thereby preventing contamination of the purified water in the purified water storage unit 200. 0 can provide purified water.

[0086] A water purifier 1 according to a second embodiment of the present invention will be described below with reference to FIGS.

[0087] In describing the second embodiment, when compared with the above-described embodiments, the differences are that the purified water storage section 200 and the raw water storage section 300 can be integrally formed, the purified water discharge flow path 450 can be connected to the purified water storage flow path 440, and the valve section 500 can further include a second valve module 520 and a third valve module 530. These differences will be mainly described, and the same descriptions and drawing symbols will be used as in the above-described embodiments.

[0088] 5, the purified water storage unit 200 and the raw water storage unit 300 may be separated by a partition formed within a single tank unit, but the present invention is not necessarily limited to this. The RO filter inlet channel 410, the purified water supply channel 420, and the purified water storage channel 440 may be connected to a single tank unit.

[0089] The second valve module 520 can open and close the purified water discharge flow path 450 so that purified water discharged from the purified water storage unit 200 is discharged to the outside of the water purifier 1 and purified water discharged from the RO filter 100 flows into the purified water storage unit 200. In other words, the second valve module 520 can open the purified water discharge flow path 450 so that purified water discharged from the purified water storage unit 200 flows into the purified water discharge flow path 450. The second valve module 520 can also close the purified water discharge flow path 450 to prevent purified water discharged from the RO filter 100 from flowing into the purified water discharge flow path 450. For example, the second valve module 520 may be a three-way valve provided at a point where the purified water storage flow path 440 and the purified water discharge flow path 450 join together.

[0090] The third valve module 530 can open and close the purified water supply channel 420 and the purified water storage channel 440. In other words, the third valve module 530 can open the purified water storage channel 440 and close the purified water supply channel 420 so that purified water discharged from the purified water storage unit 200 flows into the purified water supply channel 420 or purified water discharged from the RO filter 100 flows into the purified water storage unit 200. The third valve module 530 can also open the purified water supply channel 420 and close the purified water storage channel 440 so that purified water discharged from the purified water storage unit 200 flows into the purified water supply channel 420. For example, the third valve module 530 may be a three-way valve that is simultaneously connected to the purified water storage unit 200, the purified water supply channel 420, and the purified water storage channel 440.

[0091] 6, in the raw water sterilization mode, the controller 900 can open or close one or more valve modules so that purified water discharged from the RO filter 100 flows into the purified water storage unit 200. That is, in the raw water sterilization mode, the controller 900 can control the second valve module 520 and the third valve module 530 to close the purified water supply flow path 420 and the purified water discharge flow path 450 and open the purified water storage flow path 440.

[0092] 7, in the flushing mode, the controller 900 can open or close one or more valve modules so that purified water discharged from the purified water storage unit 200 flows into the RO filter 100. In other words, in the flushing mode, the controller 900 can control the second valve module 520 and the third valve module 530 to close the purified water storage flow path 440 and open the purified water supply flow path 420.

[0093] Furthermore, in the purified water discharge mode, the controller 900 can open or close one or more valve modules so that purified water discharged from the purified water storage unit 200 is discharged to the outside of the water purifier 1. In other words, in the purified water discharge mode, the controller 900 can control the second valve module 520 and the third valve module 530 to open the purified water storage channel 440 and the purified water discharge channel 450 and close the purified water supply channel 420.

[0094] The operation and effects of the water purifier 1 according to the second embodiment of the present invention will be described below.

[0095] The water purifier 1 according to the second embodiment of the present invention can supply purified water that can be used in the flushing mode to the purified water storage unit 200 by flowing purified water discharged from the RO filter 100 in the raw water sterilization mode. In addition, the raw water and purified water can be circulated in the raw water sterilization mode and the flushing mode, which can prevent the purified water in the purified water storage unit 200 and the raw water in the raw water storage unit 300 from being contaminated.

[0096] Hereinafter, a water purifier 1 according to a third embodiment of the present invention will be described with reference to FIGS.

[0097] Referring to Fig. 8, a water purifier 1 according to a third embodiment of the present invention can provide clean water to a user by filtering water. For example, the water purifier 1 can filter water that has been stored in advance inside. The water purifier 1 can also be an install-free water purifier that does not require connection to a water pipe. The water purifier 1 can include a filter member 1100, a raw water storage unit 1200, a flow channel 1300, a valve unit 1400, a sterilization module 1500, a pump unit 1600, and a controller 1700.

[0098] The filter member 1100 can filter raw water that has flowed in. The filter member 1100 can include an inlet portion 1110, a first filtering portion 1120, a second filtering portion 1130, a first outlet portion 1140, and a second outlet portion 1150.

[0099] The inlet 1110 is a through-hole that connects the first filtration unit 1120 to a filter inlet flow path 1310 (described later) of the flow channel 1300. The raw water flowing through the filter inlet flow path 1310 via the inlet 1110 can flow into the first filtration unit 1120.

[0100] The first filtering unit 1120 may filter raw water received from the inlet 1110 to provide first filtered water. The first filtering unit 1120 may also be connected to the first outlet 1140. The first filtering unit 1120 allows the first filtered water to flow into the second filtering unit 1130 or be discharged through the first outlet 1140. For example, the first filtering unit 1120 may include a nanotrap filter or an electrostatic filter. The electrostatic filter may be made of a material that is electrostatically charged to adsorb foreign matter contained in the received water. For example, the material may be a nanotrap material.

[0101] The second filtration unit 1130 may re-filter the first filtrate to provide a second filtrate. The second filtration unit 1130 may be connected to a second outlet. The second filtration unit 1130 may discharge the second filtrate through the second outlet 1150. For example, the second filtration unit 1130 may include a carbon filter. The carbon filter may be a carbon block formed by solidifying carbon powder into a cylindrical or polygonal cylindrical shape.

[0102] The first filtering section 1120 and the second filtering section 1130 may be formed as a single structure, but are not limited to this. In other words, the first filtering section 1120 and the second filtering section 1130 may be formed as separate structures, and the filter member 1100 is not limited to a single filter.

[0103] The first discharge part 1140 is a through-hole for connecting the first filtration part 1120 to a circulation flow path 1430 (described later) of the flow channel 1300. The first discharge part 1140 allows the first filtrate to flow into the circulation flow path 1430.

[0104] The second discharge part 1150 is a through-hole for connecting the second filtration part 1130 to a discharge flow path 1340 (described later) of the flow channel 1300. The second discharge part 1150 allows the second filtered water to flow into the discharge flow path 1340.

[0105] The raw water storage unit 1200 may provide a space for storing raw water. The raw water may be provided to the filter member 1100 through the filter inlet flow path 1310 of the flow channel 1300. The raw water storage unit 1200 may not be connected to a water pipe.

[0106] The flow channel 1300 may provide a passageway for the raw water, the first filtrate, and the second filtrate to flow between the filter member 1100, the raw water storage unit 1200, and the sterilization module 1500 via the flow channel 1300. The flow channel 1300 may include a filter inlet channel 1310, a circulation channel 1320, a flow channel 1330, a discharge channel 1340, and a discharge channel 1350.

[0107] The filter inlet channel 1310 may provide a passage for raw water to flow between the raw water storage unit 1200 and the inlet 1110 of the filter member 1100. The filter inlet channel 1310 may be in communication with the raw water storage unit 1200 and the inlet 1110 of the filter member 1100. For example, the filter inlet channel 1310 may be disposed between the raw water storage unit 1200 and the filter member 1100. The filter inlet channel 1310 allows raw water to flow from the raw water storage unit 1200 toward the inlet 1110 of the filter member 1100.

[0108] The circulation channel 1320 may provide a passage through which one or more of the first filtrate and the second filtrate can flow. The circulation channel 1430 may be in communication with the first discharge unit 1140 and the raw water storage unit 1200. The circulation channel 1430 may merge with the flow channel 1330. Through the circulation channel 1430, one or more of the first filtrate and the second filtrate can flow into the raw water storage unit 1200.

[0109] The flow channel 1330 may provide a passage through which the second filtrate can flow. The flow channel 1330 may be connected to the discharge channel 1340 and the circulation channel 1430. For example, the flow channel 1330 may be disposed between the discharge channel 1340 and the circulation channel 1430. The flow channel 1330 allows the second filtrate to flow into the circulation channel 1430.

[0110] The discharge flow path 1340 may provide a passage through which the second filtered water discharged from the second discharge unit 1150 can flow. The discharge flow path 1340 may be in communication with the second discharge unit 1150 and merge with the flow path 1330. Through the discharge flow path 1340, the second filtered water discharged from the second discharge unit 1150 can flow into the flow path 1330. In addition, the portion where the discharge flow path 1340 and the flow path 1330 merge may be located between the first discharge unit 1140 and the sterilization module 1500 on the circulation flow path 1430.

[0111] The discharge flow path 1350 may provide a passage for discharging the second filtered water to the outside. The discharge flow path 1350 is connected to the discharge flow path 1340, and the second filtered water discharged from the discharge flow path 1340 may flow into the discharge flow path 1350. The discharge flow path 1350 allows the second filtered water to be discharged to the outside.

[0112] Valve unit 1400 may include one or more valve modules that are selectively opened and closed to regulate the flow of raw water, first filtrate, and second filtrate in flow channel 1300. For example, a valve module may be provided on first outlet 1140 to selectively open and close first outlet 1140. In other words, when the valve module is opened, the first filtrate can be discharged from first outlet 1140, and when the valve module is closed, the second filtrate can be discharged from second outlet 1150.

[0113] The sterilization module 1500 can sterilize the first filtered water discharged from the first outlet 1140 and the second filtered water discharged from the second outlet 1150. The sterilization module 1500 can be disposed in the circulation flow path 1430. In other words, the sterilization module 1500 can sterilize the first filtrate and the second filtrate flowing through the circulation flow path 1430. The sterilization module 1500 can sterilize the first filtrate and the second filtrate by providing a sterilizing substance to the first filtrate and the second filtrate or by electrolysis.

[0114] The pump unit 1600 may pressurize the raw water so that it flows into the filter member 1100. In addition, the pump unit 1600 may pressurize the first filtered water toward the first outlet 1140 or the second filtering unit 1130, or may pressurize the second filtered water toward the second outlet 1150. The pump unit 1600 may be installed in the filter inlet flow path 1310.

[0115] The controller 1700 can control the opening and closing of one or more valve modules based on a plurality of flow modes to control the sterilization module 1500. The plurality of flow modes can include a raw water sterilization mode, a filter cleaning mode, and a clean water discharge mode.

[0116] 9 , the raw water sterilization mode is a mode for sterilizing raw water in the raw water storage unit 1200. In the raw water sterilization mode, the controller 1700 can open or close one or more valve modules so that raw water discharged from the raw water storage unit 1200 flows into the first filtration unit 1120 through the inlet 1110 and the first filtered water discharged from the first outlet 1140 flows to the raw water storage unit 1200 through the sterilization module 1500. For example, in the raw water sterilization mode, the controller 1700 can control the valve modules to open so that the first outlet 1140 is opened. In addition, in the raw water sterilization mode, the controller 1700 can drive the sterilization module 1500 so that the first filtered water is sterilized. In addition, in the raw water sterilization mode, the pump unit 1600 can be controlled by the controller 1700 to pressurize the raw water at a predetermined first pressure so that the raw water flows into the first filtration unit 1120 through the inlet 1110. In this raw water sterilization mode, the raw water is filtered by the first filtration unit 1120, sterilized by the sterilization module 1500, and stored again in the raw water storage unit 1200.

[0117] 10 , the filter cleaning mode is a mode for cleaning the filter element 1100. In the filter cleaning mode, the controller 1700 can open or close one or more valve modules so that raw water discharged from the raw water storage unit 1200 flows into the inlet 1110 and second filtered water discharged from the second outlet 1150 flows toward the raw water storage unit 1200. For example, in the filter cleaning mode, the controller 1700 can control the valve modules to close so that the first outlet 1140 is closed. In such a filter cleaning mode, the second filtered water can be defined as water used to clean the filter element 1100. In addition, in the filter cleaning mode, the controller 1700 can drive the sterilization module 1500 to sterilize the second filtered water. In addition, in the filter cleaning mode, the pump unit 1600 is controlled by the controller 1700 to pressurize the raw water with a second pressure greater than the first pressure so that the raw water passes through the inlet 1110, passes through the first filtration unit 1120, and flows to the second filtration unit 1130. In this filter cleaning mode, the raw water cleans the filter member 1100, is sterilized by the sterilization module 1500, and is stored again in the raw water storage unit 1200.

[0118] The filter cleaning mode can also be performed after the raw water sterilization mode. In other words, the raw water that has been filtered by the filter element 1100 and sterilized by the sterilization module 1500 can flush the filter element 1100.

[0119] Referring further to FIG. 11 , the purified water discharge mode is a mode for discharging purified water. In the purified water discharge mode, the controller 1700 can open or close one or more valve modules so that the second filtered water discharged from the second outlet 1150 is discharged to the outside. For example, in the purified water discharge mode, the controller 1700 can control the valve modules to close so that the first outlet 1140 is closed. In such a purified water discharge mode, the second filtered water can be defined as purified water. Also, in the purified water discharge mode, the pump unit 1600 can be controlled by the controller 1700 to pressurize the raw water with a second pressure greater than the first pressure so that the raw water passes through the inlet 1110, passes through the first filtration unit 1120, and flows to the second filtration unit 1130. In such a purified water discharge mode, the second filtered water can be discharged to the outside through the discharge flow path 1340 and the discharge flow path 1350.

[0120] Also, the purified water discharge mode can be performed after the filter cleaning mode, i.e., the purified water filtered by the cleaned filter member 1100 can be discharged to the outside.

[0121] The controller 1700 described above can be realized by a computing device including a microprocessor, a measuring device such as a sensor, and a memory, and since the realization method thereof is obvious to those skilled in the art, further detailed description will be omitted.

[0122] The operation and effects of the water purifier 1 according to the third embodiment of the present invention will be described below.

[0123] In the water purifier 1 according to the third embodiment of the present invention, in the raw water sterilization mode, raw water circulates between the raw water storage unit 1200 and the filter member 1100 and can be sterilized by the sterilization module 1500, thereby preventing contamination of the raw water in the raw water storage unit 1200. That is, the raw water storage unit 1200 is installed in an install-free water purifier that does not require a water pipe connection, and the raw water in the raw water storage unit 1200 can be circulated and sterilized even if raw water is not supplied through a water pipe.

[0124] In the filter cleaning mode, raw water circulates through the raw water storage unit 1200 and the filter member 1100 to clean the filter member 1100, thereby preventing impurities from accumulating in the filter member 1100. In addition, the second filtered water containing impurities can be sterilized by the sterilization module 1500 and flow into the raw water storage unit 1200, thereby preventing the raw water in the raw water storage unit 1200 from being contaminated.

[0125] In addition, the filter cleaning mode is performed after the raw water sterilization mode, and the raw water filtered by the filter element 1100 and sterilized by the sterilization module 1500 can clean the filter element 1100, thereby more efficiently cleaning impurities from the filter element 1100.

[0126] In addition, the purified water discharge mode can be performed after the filter cleaning mode, so that purified water filtered by the cleaned filter member 1100 can be provided to the user.

[0127] Although the embodiments of the present invention have been described above using specific examples, these are merely examples, and the present invention is not limited thereto and should be construed as having the broadest scope in accordance with the technical ideas disclosed herein. Those skilled in the art may combine / substitute the disclosed examples to implement patterns of shapes not shown, but this would not depart from the scope of the present invention. Furthermore, those skilled in the art may easily modify or change the disclosed examples based on this specification, and it is clear that such modifications or changes also fall within the scope of the present invention.

Claims

1. a filter member including an inlet portion into which raw water flows, a first filtration portion for filtering the raw water flowing in through the inlet portion to provide first filtered water, a second filtration portion for re-filtering the first filtrate to provide second filtrate water, a first discharge portion for discharging the first filtrate water, and a second discharge portion for discharging the second filtrate water; a raw water storage section for storing the raw water; a flow channel providing a passageway for the raw water, the first filtrate, and the second filtrate; a valve section including one or more valve modules selectively opened and closed to regulate the flow of the raw water, the first filtrate, and the second filtrate in the flow channels; a sterilization module for sterilizing the first filtered water discharged from the first discharge portion and the second filtered water discharged from the second discharge portion; and a controller that controls the opening and closing of the valve module based on a plurality of flow modes and controls the sterilization module; The plurality of flow modes includes a raw water sterilization mode for sterilizing the raw water in the raw water storage unit, The controller In the raw water sterilization mode, the raw water discharged from the raw water storage unit flows into the first filtration unit through the inlet unit, and the first filtered water discharged from the first outlet unit flows into the raw water storage unit through the sterilization module. The water purifier, wherein the sterilization module sterilizes the first filtered water in the raw water sterilization mode.

2. the plurality of flow modes includes a filter cleaning mode for cleaning the filter element; The controller In the filter cleaning mode, the one or more valve modules are opened and closed so that the raw water discharged from the raw water storage unit flows into the inlet port and the second filtered water discharged from the second outlet port flows toward the raw water storage unit; The water purifier according to claim 1 , wherein the sterilization module sterilizes the second filtered water in the filter cleaning mode.

3. further comprising a pump unit for pressurizing the raw water to the inlet; The pump unit comprises: In the raw water sterilization mode, the raw water is pressurized with a predetermined first pressure so that the raw water flows into the first filtration section through the inlet section; In the filter cleaning mode, the raw water is pressurized with a predetermined second pressure so that the raw water passes through the first filtration section via the inflow section and flows into the second filtration section; The water purifier according to claim 2, wherein the second pressure is greater than the first pressure.

4. The flow channel comprises: a filter inlet channel connected to the raw water storage unit and the inlet, providing a passage for the raw water to flow between the raw water storage unit and the inlet; and a circulation flow path connected to the first discharge portion and the raw water storage portion, the circulation flow path providing a passage for the first filtered water discharged from the first discharge portion to flow into the raw water storage portion; The water purifier according to claim 1 , wherein the sterilization module is provided in the circulation flow path.

5. The flow channel comprises: The second filtered water discharged from the second discharge part further includes a flow passage that merges with the circulation passage and provides a passage for the second filtered water to flow. a joining portion of the flow channel and the circulation channel is located between the first discharge unit and the sterilization module on the circulation channel; The water purifier according to claim 4, wherein the second filtered water flowing through the flow passage flows to the raw water storage unit via the circulation passage.

6. the first filtration unit includes a nanotrap filter or an electrostatic filter, The water purifier according to claim 1, wherein the second filtering unit includes a carbon filter.

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