Electrolyzed water generation module and water treatment device including same

Abstract

An electrolytic water generating module, a water treatment device, and a cleaning device according to one embodiment of the present disclosure are characterized in that they comprise an electrolysis chamber having an internal space, a diaphragm that divides the internal space of the electrolysis chamber into a first electrolytic cell and a second electrolytic cell, is impermeable to ionic substances, and allows electricity to flow, a first electrode disposed in the first electrolytic cell, and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode, wherein at least one of the first electrode and the second electrode comprises a substrate metal layer and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer.

Description

Technology Field

[0001] The present disclosure relates to a water treatment device and a cleaning device including the same, and more specifically, to a water treatment device that generates electrolyzed water with less energy and has improved cleaning power, and a cleaning device including the same. Background Technology

[0002] Generally, water treatment devices are being introduced in various modern forms. Among the methods applied to water treatment devices, deionization techniques such as EDI (Electro Deionization), CEDI (Continuous Electro Deionization), and CDI (Capacitive Deionization) have recently been gaining prominence. Of these, the CDI-based water treatment device is currently receiving the most attention.

[0003] The CDI method refers to a technique for removing ions (scale) from water by utilizing the principle of ion adsorption and desorption on the surface of electrodes through electrical force.

[0004] When treated water containing ions is passed between the electrodes (anode and cathode) while a voltage is applied to the electrodes, anions move to the anode and cations move to the cathode. In other words, adsorption occurs. Through such adsorption, ions in the treated water can be removed.

[0005] However, as such adsorption continues, the electrode reaches a state where it can no longer adsorb ions. When this state is reached, the ions adsorbed on the electrode are separated to regenerate the electrode. At this time, the wash water containing the ions separated from the electrode is discharged to the outside. Such regeneration can be achieved by not applying voltage to the electrode, or by applying voltage opposite to that applied during adsorption.

[0006] While scale formation can be prevented through electrode polarity switching in this manner, this polarity switching process can cause electrode damage due to the repeated switching of high potentials. Consequently, the lifespan of the metal forming the electrode may be shortened.

[0007] In other words, if polarity switching is performed to remove scale, the repeated oxidation and reduction of the electrode metal layer can cause damage and shorten the lifespan of the catalyst electrode.

[0008] In addition, during this scale removal process, scale material may be re-adsorbed onto the opposite electrode, which can reduce the efficiency of scale removal.

[0009] Generally, dishwashers are designed to make dishwashing easier, more hygienic, and more efficient. They utilize washing water contained in the lower washing tank to clean dishes and cutlery contaminated with food residue or foreign substances using methods such as water jet washing or brush washing.

[0010] The dishwasher is configured so that dishes to be washed are placed on a shelf formed inside the dishwasher and washing water is supplied through a spray nozzle or a brush is used to wash the dishes, and after washing is completed, the washing water used for washing is discharged through a drain pipe.

[0011] In the past, cleaning systems and methods using ultraviolet rays, ozone gas, or ultrasound have been proposed to clean fruits and vegetables without using synthetic detergents. However, these devices and methods have the problem that they are difficult to implement in practice due to their technical complexity and high installation costs.

[0012] Furthermore, while methods using ultraviolet rays are suitable for air sterilization, they are not suitable for water sterilization. Methods using ozone gas require proper control of the amount of ozone used because ozone is harmful to the human body, but maintaining an appropriate level of ozone presents many difficulties. Additionally, methods using only ultrasound have the disadvantage of low sterilization efficiency.

[0013] Although a method is used to improve the water quality supplied to the dishwasher and enhance drying performance by connecting to a separate water softening device and using softened water during washing to enable hygienic cleaning, there is a problem in that the hard water generated during the regeneration stage when improving the ion exchange rate to enhance water softening performance is discarded as is.

[0014] In addition, even if the hard water generated during the regeneration stage is used for preliminary washing, a large amount of rinsing water is used, which increases water consumption.

[0015] Meanwhile, there is a method to increase sterilization power by generating various oxidizing agents using electrolysis; however, this electrolysis requires the supply of water with a high TDS (total dissolved solids), which has the disadvantage of requiring high-cost electrodes to increase the generation rate of electrolyzed water.

[0016] In addition, as shown in Patent Document 1, an electrolytic water sterilization water treatment device and a washing device are disclosed that utilize a sterilizing substance generated by electrolyzing hard water, which is produced during the process of softening raw water flowing into the water treatment device and washing device, by equipping the water softening module and the electrolytic water generation module.

[0017] However, in the case of Patent Literature 1, when the electrolytic water module is driven using hard water generated from a water softener, in regions where tap water with a low TDS concentration is supplied, such as in Korea, water softener regeneration is performed after several dishwasher operations; therefore, the hard water generated during water softener regeneration cannot be used for every dishwasher operation, and as a result, the use of the electrolytic water module is limited.

[0018] In the case of tap water softened through a water softener, divalent cations (Ca) are converted by the ion exchange resin. 2+ , Mg 2+ Although the ions (etc.) are replaced by monovalent cations (Na+), the electrical conductivity equivalent is the same before and after treatment, so the TDS remains equally low. When operating an electrolytic water module with such soft water, a high voltage must be applied for electrolysis to occur due to the low TDS, and this problem leads to increased electrode costs and reduced lifespan of the electrolytic water module.

[0019] In addition, large amounts of platinum, an expensive precious metal, are generally used as electrode materials for electrolytic water modules to ensure stability in acidic and alkaline environments; this poses a problem of significantly increasing costs for eco-friendly laundry devices utilizing electrolysis equipment. Prior art literature

[0021] Patent Document 1 - KR 10-1551978 B1 The problem to be solved

[0022] The problem that the present disclosure aims to solve is to provide a cleaning device capable of reducing detergent usage or cleaning under detergent-free conditions.

[0023] Another objective of the present disclosure is to provide a water treatment device and a cleaning device that reduce power consumption during electrolytic water generation by injecting a certain amount of concentrated brine for the regeneration of the ion exchange resin of a water softener into the influent of an electrolytic water generator to increase the electrical conductivity of the electrolytic water.

[0024] Another objective of the present disclosure is to provide a water treatment device and a cleaning device that improve the durability of the electrode and improve the energy consumption of the electrolytic water generator by operating for only a short time during reverse operation required to suppress scale formation in the electrolytic water generator, because scale particles such as calcium are reduced due to the use of a water softener.

[0025] Another objective of the present disclosure is to provide a water treatment device and a cleaning device that improve performance and lifespan while significantly reducing the amount of platinum, an expensive precious metal, by improving the electrode of the electrolytic water generator.

[0026] The problems of the present disclosure are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0027] To achieve the above objective, an electrolytic water generating module, a water treatment device, and a cleaning device according to one embodiment of the present disclosure comprise: an electrolytic chamber having an internal space; a diaphragm that divides the internal space of the electrolytic chamber into a first electrolytic cell and a second electrolytic cell, is impermeable to ionic substances, and allows electricity to flow; a first electrode disposed in the first electrolytic cell and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode; wherein at least one of the first electrode and the second electrode comprises a substrate metal layer and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer.

[0028] The above substrate metal layer may include at least one of Ti, Ti oxide, and SUS.

[0029] The catalyst metal layer may include at least one of a group 1 material including Ru, Ir, Pt, and Pd, and at least one of a group 2 material including Ti, Ta, and Sn.

[0030] The catalyst metal layer may include an oxide of one of group 1 materials including Ru, Ir, Pt, and Pd, and an oxide of one of group 2 materials including Ti, Ta, and Sn.

[0031] The ratio of the above-mentioned Group 1 material to the above-mentioned Group 2 material may be 9 to 1 to 8 to 2.

[0032] At least one of the first electrode and the second electrode further includes a protective layer located between the substrate metal layer and the catalyst metal layer, and the protective layer may be an oxide of at least one of Ti, Ta, and Sn.

[0033] The thickness of the protective layer may be thinner than the thickness of the substrate metal layer.

[0034] The above substrate metal layer includes Ti, and the above catalyst metal layer may include Pt and Ti.

[0035] The ratio of Pt to Ti in the catalytic metal layer can be 9 to 1 to 8 to 2.

[0036] Additionally, the present disclosure further comprises a protective layer positioned between the substrate metal layer and the catalyst metal layer, and the protective layer may be an oxide of Ti.

[0037] One of the first electrode and the second electrode comprises a substrate metal layer and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer, and the other of the first electrode and the second electrode may comprise a substrate metal layer.

[0038] The first electrode and the second electrode may have the same configuration as each other.

[0039] Additionally, the present disclosure further includes a control unit that drives the first electrode and the second electrode of the electrolytic water generation module by applying voltage or current, wherein the control unit alternately performs a positive potential drive in which the polarity of the first electrode and the second electrode is driven to a positive potential and a reverse potential drive in which the polarity of the first electrode and the second electrode is driven to a reverse potential, and the driving time of the reverse potential drive may be shorter than the driving time of the positive potential drive.

[0040] The voltage or current during the above reverse potential driving may be smaller than the voltage or current during the above positive potential driving.

[0041] Additionally, the present disclosure further includes a control unit that drives the first electrode and the second electrode of the electrolytic water generation module by applying voltage or current, and the control unit alternately performs a positive potential drive in which the polarity of the first electrode and the second electrode is driven to a positive potential and a reverse potential drive in which the polarity of the first electrode and the second electrode is driven to a reverse potential, and the driving time of the reverse potential drive may be the same as the driving time of the positive potential drive.

[0043] In addition, an electrolytic water generation module, a water treatment device, and a cleaning device according to another embodiment of the present disclosure comprise an electrolysis chamber having an internal space, a separation membrane that selectively permeates ionic substances and divides the internal space of the electrolysis chamber into a first electrolytic cell, a second electrolytic cell, and a brine tank between the first electrolytic cell and the second electrolytic cell, a first electrode disposed in the first electrolytic cell, and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode, wherein at least one of the first electrode and the second electrode comprises a substrate metal layer; and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer.

[0044] In addition, a water treatment device and a cleaning device according to another embodiment of the present disclosure include a water softening module that receives raw water and produces soft water; a brine generating module that produces brine; and an electrolytic water generating module that produces electrolytic water by electrolyzing a mixed water in which the soft water produced in the water softening module and the brine produced in the brine generating module are mixed. The electrolytic water generating module includes an electrolysis chamber having an internal space; a diaphragm that divides the internal space of the electrolysis chamber into a first electrolytic cell and a second electrolytic cell, is impermeable to ionic substances, and allows electricity to flow; a first electrode disposed in the first electrolytic cell; and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode. At least one of the first electrode and the second electrode comprises a substrate metal layer and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer.

[0045] In addition, a water treatment device and a washing device according to another embodiment of the present disclosure include a water softening device that receives raw water and produces soft water; a brine generating device that produces brine; and an electrolytic water generating device that uses the brine generated in the brine generating device to electrolyze the soft water generated in the water softening device to produce electrolytic water, wherein the electrolytic water generating device comprises: an electrolysis chamber having an internal space; a separator that selectively permeates ionic substances and divides the internal space of the electrolysis chamber into a first electrolytic cell, a second electrolytic cell, and a brine tank between the first electrolytic cell and the second electrolytic cell; a first electrode disposed in the first electrolytic cell; and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode, wherein at least one of the first electrode and the second electrode comprises a substrate metal layer; and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer.

[0046] Specific details of other embodiments are included in the detailed description and drawings. Effects of the invention

[0047] According to the vibration damping panel of the present disclosure and the water treatment device and washing device including the same, one or more of the following effects are provided.

[0048] The present disclosure performs cleaning using softened water and electrolyzed water generated through a softened water generation module and an electrolyzed water generation module, and thus has the advantage of reducing detergent usage or enabling cleaning under detergent-free conditions due to the sterilizing power of the electrolyzed water.

[0049] In addition, the present disclosure has the advantage of saving power during electrolytic water generation because it increases the electrical conductivity of the electrolytic water by injecting a certain amount of brine for the regeneration of the ion exchange resin of a water softener into the influent of the electrolytic water generator.

[0050] In addition, the present disclosure has the advantage of improving the energy consumption of the electrolytic water generator by minimizing electrode damage by operating for only a short time during reverse operation required to suppress scale formation in the electrolytic water generator, as the amount of scale particles such as calcium is reduced due to the use of a water softener, and by reducing the operating time and increasing the electrolytic water generation time.

[0051] In addition, the present disclosure has the advantage of improving performance and lifespan while drastically reducing the amount of platinum, an expensive precious metal, by configuring the electrode of an electrolytic water generating device into a multilayer structure of a substrate metal layer and a catalyst metal layer.

[0052] The effects of the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0053] FIG. 1 is a conceptual diagram illustrating the operation of a cleaning device in one embodiment of the present disclosure. Figure 2 is a cross-sectional view schematically showing the structure of the cleaning module of Figure 1. Figure 3 is a schematic diagram showing the structure of the electrolytic water generation module of Figure 1. FIGS. 4a and FIGS. 4b are cross-sectional views illustrating the structure of the electrodes of the electrolytic water generation module of FIG. 1. Figure 4c is a graph showing the lifespan according to the structure of the electrodes of the electrolytic water generation module. Figure 5 is a diagram illustrating the relationship between voltage and current of tap water, tap water, salt water, and mixed water. Figure 6 is a graph showing the pH concentration of water and the solubility of CaCO3. Figure 7 shows the pH concentration of water and Mg 2+ , MgOH + This is a graph illustrating the correlation with the fraction of the back. FIG. 8a is a diagram illustrating the operation of an electrolytic water generation module according to one embodiment of the present disclosure. FIG. 8b is a diagram illustrating the operation of an electrolytic water generation module according to another embodiment of the present disclosure. FIG. 9 is a cross-sectional view illustrating the structure of an electrode of an electrolytic water generation module according to another embodiment of the present disclosure. Specific details for implementing the invention

[0054] The advantages and features of the present disclosure and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure is complete and to fully inform those skilled in the art of the scope of the invention, and the present disclosure is defined only by the scope of the claims. Throughout the specification, like reference numerals refer to like components.

[0055] Hereinafter, the present disclosure will be described with reference to drawings for explaining a water treatment device and a washing device (1) according to one embodiment of the present disclosure.

[0057] FIG. 1 is a conceptual diagram illustrating the operation of a cleaning device in one embodiment of the present disclosure.

[0058] Referring to FIG. 1, the cleaning device includes a cleaning module (1), a water softening module (2) connected to a water source, a brine generating module (5) that generates brine, and an electrolytic water generating module (3) that generates electrolytic water by electrolyzing a mixture of water in which the water softened from the water softening module (2) and the brine generated from the brine generating module (5) are mixed.

[0059] Of course, in other embodiments, the electrolytic water generation module (3) may generate electrolytic water by using the brine generated in the brine generation module (5) to electrolyze the soft water generated in the soft water generation module (2).

[0060] The water softening module (2), the brine generation module (5), and the electrolytic water generation module (3) can be collectively referred to as a water treatment device.

[0061] The washing module (1) provides a space where an object to be washed is washed. The washing module (1) receives electrolyzed water and uses the electrolyzed water to wash the object. The washing module (1) may include either a dishwasher for washing dishes or a washing machine for washing clothes.

[0062] The cleaning module (1) is described in detail in FIG. 2.

[0063] The process of the raw water becoming soft or hard as it passes through the water softening module (2) is examined in detail.

[0064] First, raw water is supplied from the outside through the raw water channel (111) to the softened water generating module (2) and / or the brine generating module (5). A first valve (131) may be installed in the raw water channel (111). The first valve (131) opens and closes the raw water channel (111).

[0065] The raw water channel (111) is connected to the first supply channel (112) and the second supply channel (113). The first supply channel (112) is connected to the soft water generation module (2), and the second supply channel (113) is connected to the brine generation module (5).

[0066] A second valve (132) for opening and closing the second supply path (113) may be provided in the second supply path (113).

[0067] The water softening generation module (2) may be equipped with a water softening chamber inside. The water softening chamber includes an ion exchange resin that converts raw water supplied from the outside into soft water.

[0068] The brine generation module (5) is equipped with a regeneration chamber. The regeneration chamber is filled with salt for supplying regeneration water (brine) to regenerate the ion resin to its original state when the performance of the ion resin deteriorates.

[0069] Preferably, the water softening module (2) and the brine generating module (5) may be composed of a single module, and the water softening module (2) and the brine generating module (5) may be connected by a regeneration channel (not shown). The regeneration channel supplies brine generated in the brine generating module (5) to the water softening module (2).

[0070] When the performance of the ion exchange resin in the water softening module (2) deteriorates due to continuous use, Na passes through the brine generation module (5) + By passing the regenerated water containing this through the ion exchange resin in the water softening module (2), the accumulated Ca 2+ and Mg 2+ Makes a substitution with

[0071] Meanwhile, after the above regeneration process is completed, a rinsing process is performed in which raw water is supplied directly from the first valve (131)(111) to the water softening module (2) to wash away Na+ remaining outside the ion exchange resin within the water softening module (2).

[0072] Therefore, the raw water undergoes a process in which hardness components are removed in the water softening module (2) to become soft water.

[0073] Softened water generated in the water softening module (2) is supplied to the electrolytic water generating module (3). Specifically, the water softening module (2) and the electrolytic water generating module (3) are connected by a water softening supply path (114). A third valve (133) is installed to open and close the water softening supply path (114).

[0074] Of course, the brine generated in the brine generation module (5) is supplied to the electrolytic water generation module (3). Specifically, the brine generated in the brine generation module (5) is mixed with the soft water generated in the soft water generation module (2) and supplied to the electrolytic water generation module (3).

[0075] The brine discharged from the brine generation module (5) is supplied to the soft water supply channel (114). The brine generation module (5) and the soft water supply channel (114) are connected by the brine channel (115).

[0076] The mixture of softened water and brine supplied from the softened water supply channel (114) can be supplied to each of the multiple electrolytic cells of the electrolytic water generation module (3). The softened water supply channel (114) and each electrolytic cell can be connected by a mixed water channel (116). For example, the mixed water channel (116) may include a first mixed water channel (116a) and a second mixed water channel ((116)b).

[0077] The mixed water supplied from the water softening module (2) and the brine generation module (5) is electrolyzed in the electrolytic water generation module (3) and then flows into the washing module (1) after undergoing the process of being converted into electrolytic water.

[0078] The present disclosure allows for a lower utilization rate of detergent and an increase in cleaning effect by using a mixed water, which is a mixture of salt water and softened water discharged during the softening process, in an electrolyzed state as a cleaning water, and since the electrical conductivity within the electrolytic water generation module (3) increases, the cost and energy of generating electrolytic water can be reduced.

[0079] Generally, raw water introduced from the outside contains chlorine, which is typically used for disinfection, and electrolyzed water is ionized into hydrogen and oxygen atoms; as these ionized oxygen atoms combine with chlorine, chlorine monoxide (ClO₂), an oxidizing mixed oxidant, is produced. - It generates ) . The chlorine monoxide generated in this way has the property of easily adsorbing other components, and as a result, it can sterilize and clean by adsorbing various harmful bacteria on the dishes stored in the washing module (1).

[0080] In the electrolytic water generation module (3), since it is necessary to supply water with a high TDS (dissolved oxygen content) to generate electrolytic water, Cl passes through the soft water generation module (2). - , Ca 2+ and Mg 2+ Hard water containing various ions can be utilized. Hard water (soft water) is supplied from the soft water generation module (2) to the electrolytic water generation module (3), and since it is water that has undergone regeneration or rinsing, dissolved ions are present in greater quantities than in ordinary tap water.

[0081] The water that has undergone electrolysis in the electrolytic water generation module (3) exhibits a sterilization effect. Sterilization by electrolysis is a technique that sterilizes or eliminates microorganisms remaining in the water by allowing water to pass between electrodes of different polarities, and the treated water contains chlorine (Cl 2 ), hypochlorite ion (OCl) -Oxidative mixtures that have a bactericidal effect, such as ) and other bactericidal ions and free radicals, are generated. Various oxidizing agents, such as hypochlorous acid, chlorine, chlorine dioxide, and other chlorine-based oxidizing agents, are the most effective bactericidal agents used for hygiene purposes in household or industrial products.

[0082] The strong oxidation potential of these oxidizing agent molecules is being applied in various fields, including disinfection and sterilization; therefore, a detailed explanation of the disinfection and sterilization processes or effects is omitted.

[0083] The detailed configuration of the electrolytic water generation module (3) is described later in FIG. 3.

[0084] A storage tank (4) for storing electrolyzed water may be placed between the electrolyzed water generation module (3) and the washing module (1). For example, the storage tank (4) may be composed of a first storage tank (41) in which electrolyzed water with a pH concentration lower than a reference pH concentration is stored, and a second storage tank (42) in which electrolyzed water with a pH concentration higher than a reference pH concentration is stored.

[0085] Preferably, acidic electrolyzed water is stored in the first storage tank (41), and basic electrolyzed water is stored in the second storage tank (42).

[0086] The first storage tank (41) is connected to the first electrolytic tank (S1) by an acidic water supply path (117), and the second storage tank (42) is connected to the second electrolytic tank (S2) by an alkaline water supply path (118).

[0087] The first storage tank (41) and the second storage tank (42) are connected by a washing module (1) and a washing water supply path (119). The acidic electrolytic water discharged from the first storage tank (41) is controlled by the fourth valve (134), and the alkaline electrolytic water discharged from the second storage tank (42) can be controlled by the fifth valve (135).

[0088] The washing module (1) selectively receives acidic water or alkaline water generated from the electrolytic water generation module (3) to wash the object to be washed. Specifically, the washing module (1) receives alkaline water from the electrolytic water generation module (3) to wash the object to be washed, and the acidic water is drained into the drainage channel.

[0089] Soft water generated in the soft water generation module (2) can be supplied to the washing module (1) through the bypass channel (120) and drained from the washing module (1). Brine generated in the brine generation module (5) can be supplied to the washing module (1) through the bypass channel (120) and drained from the washing module (1).

[0090] The bypass path (120) bypasses the electrolytic water generation module (3) with a mixture of soft water generated in the soft water generation module (2) and brine generated in the brine generation module (5).

[0091] The bypass path (120) can be connected to the water supply path (114). A bypass valve (121) for opening and closing the bypass path (120) may be provided in the bypass path (120).

[0093] FIG. 2 is a cross-sectional view schematically showing the structure of the cleaning module (1) of FIG. 1.

[0094] Referring to FIG. 2, a dishwasher, which is an embodiment of a washing module (1), is described.

[0095] A dishwasher (1) comprises a case (10) forming an exterior, a washing tank (30) provided inside the case (10), a door (11) rotatably installed in the case (10) to open and close the washing tank (30), baskets (12a, 12b) provided inside the washing tank (30) to store dishes, spray nozzles (311, 313, 330, 340) spraying washing water, a sump (not shown) storing washing water, a circulation pump (51) pumping washing water from the sump and supplying it to the spray nozzles (311, 313, 330, 340), a drainage pump (52) discharging washing water from the sump along with dirt to the outside of the case (10), a vane (400) moving inside the washing tank (30) and reflecting washing water toward the dishes, and a vane driving device (not shown) driving the vane (400). It can be included.

[0096] The washing tank (30) may be provided inside the case (10) so as to have at least one open side. As an example, the washing tank (30) may have a roughly box shape with an open front to allow for the loading and unloading of dishes. The front opening (36, FIG. 3) of the washing tank (30) may be opened and closed by a door (11).

[0097] For example, the washing tank (30) may include an upper surface (31), a bottom surface (35) facing the upper surface (31), a rear surface (32) facing the front opening (36), and left and right sides (33) facing each other.

[0098] The top surface (31) and the bottom surface (35) are connected by the rear surface (32), the left side (33), and the right side (34). Additionally, the washing tank (30) may include ribs (38) to reinforce rigidity and reduce vibration. The ribs (38) may be defined as surfaces having a step difference with one side of the washing tank (30). The ribs (38) may be formed by protruding or recessing one side of the washing tank (30). The ribs (38) may be formed on the top surface (31), bottom surface (35), rear surface (32), left side (33), and right side (34) of the washing tank (30).

[0099] The door (11) can be formed by combining at least two door frames. One of the door frames may form the exterior, and the other door frame may form the interior of the door.

[0100] The baskets (12a, 12b) may be wire racks made of wire so that washing water can pass through without accumulating. The baskets (12a, 12b) may be detachably provided inside the washing tank (30). The baskets (12a, 12b) may include an upper basket (12a) placed at the top of the washing tank (30) and a lower basket (12b) placed at the bottom of the washing tank (30).

[0101] The spray nozzles (311, 313, 330, 340) can wash dishes by spraying washing water at high pressure. The spray nozzles (311, 313, 330, 340) may include an upper rotating nozzle (311) provided at the top of the washing tank (30), an intermediate rotating nozzle (313) provided at the center of the washing tank (30), and fixed nozzles (330, 340) provided at the bottom of the washing tank (30).

[0102] The upper rotating nozzle (311) is provided on the upper side of the upper basket (12a) and can spray washing water downward while rotating by water pressure. To this end, spray holes (312) may be provided at the bottom of the upper rotating nozzle (311). The upper rotating nozzle (311) can spray washing water directly toward the dishes stored in the upper basket (12a).

[0103] An intermediate rotating nozzle (313) is provided between the upper basket (12a) and the lower basket (12b) and can spray washing water in an up-and-down direction while rotating by water pressure. To this end, spray holes (314) may be provided at the top and bottom of the intermediate rotating nozzle (313). The intermediate rotating nozzle (313) can spray washing water directly toward the dishes stored in the upper basket (12a) and the lower basket (12b).

[0104] The fixed nozzles (330, 340) are arranged so as not to move, unlike the rotating nozzles (311, 313), and are fixed to one side of the washing tank (30). The fixed nozzles (330, 340) are positioned approximately adjacent to the rear (32) of the washing tank (30) so as to spray washing water toward the front of the washing tank (30). Thus, the washing water sprayed from the fixed nozzles (330, 340) may not be directed directly toward the dishes.

[0105] Washing water sprayed from fixed nozzles (330, 340) can be reflected toward the tableware by vanes (400). The fixed nozzles (330, 340) are positioned below the lower basket (12b), and vanes (400) can reflect washing water sprayed from the fixed nozzles (330, 340) upwards. That is, washing water sprayed from the fixed nozzles (330, 340) can be reflected toward the tableware stored in the lower basket (12b) by vanes (400).

[0106] Each fixed nozzle (330, 340) may have a plurality of spray holes (331, 341) arranged in the left and right directions of the washing tank (30).

[0107] Multiple spray holes (331, 341) can spray cleaning water forward. The vane (400) can be extended in the left and right directions of the cleaning tank (30) so as to reflect all the cleaning water sprayed from the multiple spray holes (331, 341) of the fixed nozzles (330, 340). That is, one end in the longitudinal direction of the vane (400) can be adjacent to the left side (33) of the cleaning tank (30), and the other end in the longitudinal direction of the vane (400) can be adjacent to the right side (34) of the cleaning tank (30).

[0108] These vanes (400) can reciprocate linearly along the direction of spraying of the cleaning water sprayed from the fixed nozzles (330, 340). That is, the vanes (400) can reciprocate linearly along the front and rear directions of the cleaning tank (30).

[0109] Therefore, the linear spray structure including these fixed nozzles (330, 340) and vanes (400) can clean the entire area of ​​the washing tank (30) without any blind spots. This is different from the case of rotary nozzles, which can only spray washing water within the range of the rotation radius.

[0110] The fixed nozzles (330, 340) may include a left fixed nozzle (330) positioned on the left side of the washing tank (30) and a right fixed nozzle (340) positioned on the right side of the washing tank (30).

[0111] The rotating nozzles (311, 313) and the fixed nozzles (330, 340) can spray cleaning water independently of each other. Furthermore, the left fixed nozzle (330) and the right fixed nozzle (340) can also spray cleaning water independently of each other.

[0112] The washing water sprayed from the left fixed nozzle (330) is reflected only to the left area of ​​the washing tank (30) by the vane (400), and the washing water sprayed from the right fixed nozzle (340) can be reflected only to the right area of ​​the washing tank (30) by the vane (400).

[0113] Therefore, the dishwasher (1) can independently divide and wash the left and right sides of the washing tank (30). Of course, unlike the present embodiment, it is not necessary to divide it only into left and right sides, but it can be further subdivided as needed.

[0114] When the washing of the dishes is finished, a drying process is performed to remove the washing water remaining inside the dishes and the washing tank (30).

[0116] Figure 3 is a diagram schematically showing the structure of the electrolytic water generation module (3) of Figure 1.

[0117] Referring to FIG. 3, an electrolytic water generating module (3) according to one embodiment of the present disclosure generates electrolytic water by electrolyzing a mixture of soft water generated in a soft water generating module (2) and brine generated in a brine generating module (5).

[0118] For example, the electrolytic water generation module (3) may include an electrolysis chamber (35) having an internal space, a diaphragm (36) that divides the internal space of the electrolysis chamber (35) into a first electrolytic cell (S1) and a second electrolytic cell (S2) and is impermeable to ionic substances and allows electricity to flow, a first electrode (37) placed in the first electrolytic cell (S1), and a second electrode (38) placed in the second electrolytic cell (S2) and having a polarity opposite to that of the first electrode (37).

[0119] The first electrolytic cell (S1) and the second electrolytic cell (S2) are separated by a diaphragm (36), and an anode electrode may be placed in the first electrolytic cell (S1). A cathode electrode may be placed in the second electrolytic cell (S2). A micro membrane having micropores of 0.1 to 9 μm is generally used for the diaphragm (36).

[0120] The first electrode (37) and the second electrode (38) located within the first electrolytic cell (S1) and the second electrolytic cell (S2) electrolyze water to produce hydrogen and oxygen, while the ionic substance is H + Wow OH - The ions are left in a dissolved form in the water. At this time, the diaphragm (36) prevents the two ionic substances from mixing with each other, thereby discharging the acidic electrolytic water and alkaline electrolytic water to the outside.

[0122] Below, the structure of the electrode used in the electrolytic water generation module (3) is described in detail.

[0123] FIGS. 4a and FIGS. 4b are cross-sectional views illustrating the structure of the electrode of the electrolytic water generation module (3) of FIG. 1.

[0124] Referring to FIG. 4a, at least one of the first electrode (37) and the second electrode (38) may include a substrate metal layer (371) and a catalyst metal layer (372).

[0125] For example, an electrolytic water generating module (3) used in a dishwasher may have only the first electrode (37) comprising a substrate metal layer (371) and a catalyst metal layer (372), and the second electrode (38) may comprise a substrate metal layer (371). In a clothes washing machine, the electrolytic water generating module (3) may have the first electrode (37) and the second electrode (38) comprising a substrate metal layer (371) and a catalyst metal layer (372).

[0126] The thickness of the substrate metal layer (371) may be thicker than the thickness of the catalyst metal layer (372). Preferably, the thickness of the substrate metal layer (371) is 0.3 mm to 0.7 mm, and the thickness of the catalyst metal layer (372) may be 0.5 to 2 μm.

[0127] The substrate metal layer (371) may include at least one of Ti, Ti oxide and SUS (Stainless steel).

[0128] The catalyst metal layer (372) may include at least one of a group of materials including Ru, Ir, Pt, and Pd, and at least one of a group of materials including Ti, Ta, and Sn.

[0129] Specifically, the catalyst metal layer (372) may include an oxide of one of the materials in group 1 and an oxide of one of the materials in group 2.

[0130] Here, the ratio of the first group of materials and the second group of materials of the catalyst metal layer (372) may be 9 to 1 to 8 to 2.

[0131] Preferably, the substrate metal layer (371) may include Ti, and the catalyst metal layer (372) may include Pt and Ti. Additionally, the substrate metal layer (371) or the catalyst metal layer (372) may be in the form of a plate or a mesh.

[0132] When the ratio of Pt is less than 80%, the electrical conductivity of the catalyst metal layer (372) is insufficient, so the efficiency of producing alkaline and acidic water decreases and the driving voltage increases, accelerating damage to the electrode and reducing the lifespan performance (see FIG. 4c).

[0133] If the electrode is composed of a substrate metal layer (371) and a catalyst metal layer (372), it is stable in acid and alkali environments, and its performance and lifespan can be improved while drastically reducing the amount of platinum, an expensive precious metal.

[0135] Referring to FIG. 4b, as another example, the electrode may include at least one of the first electrode (37) and the second electrode (38), a substrate metal layer (371), a catalyst metal layer (372), and a protective layer (373) located between the substrate metal layer (371) and the catalyst metal layer (372).

[0136] The protective layer (373) may be an oxide of at least one of Ti, Ta, Si, and Sn. The protective layer (373) serves to prevent damage caused by oxidation / reduction due to contact with the substrate metal layer (371) in a direct supply of water. The protective layer (373) may be coated on the substrate metal layer (371).

[0137] Preferably, the substrate metal layer (371) comprises Ti, and the protective layer (373) comprises TiO x Includes, The catalyst metal layer (372) may include Pt and Ti.

[0138] Additionally, the thickness of the substrate metal layer (371) may be thicker than the protective layer (373). Preferably, the thickness of the substrate metal layer (371) is 0.3 mm to 0.7 mm, and the thickness of the protective layer (373) may be 0.5 to 2 μm.

[0140] Figure 4c is a graph showing the lifespan according to the structure of the electrodes of the electrolytic water generation module.

[0141] Referring to FIG. 4c, in the case of Comparative Example 1, where the catalyst metal layer (372) is composed of 100% Pt, it can be seen that the electrode lifespan is less than 200 hours.

[0142] In addition, in Comparative Example 2, where the catalyst metal layer (372) is composed of 70% Pt and 30% Ti, it can be seen that the electrode lifespan is less than 100 hours.

[0143] In the case of an embodiment in which the catalyst metal layer (372) is composed of 90% Pt and 10% Ti, the lifespan of the electrode reaches 700 hours.

[0144] Therefore, the embodiments of the present disclosure have the advantage of increasing the lifespan of the electrode.

[0146] Figure 5 is a diagram illustrating the relationship between voltage and current of tap water, tap water, salt water, and mixed water.

[0147] Referring to FIG. 5, when the salt water from a water softener is mixed with tap water (softened water or raw water) and introduced into the electrolytic water generation module (3), the electrical conductivity of the mixed water increases. When comparing the electrolysis of the mixed water in which tap water and salt water are mixed, the power required for the electrolysis of the tap water mixed with salt water, which has high electrical conductivity, is reduced. If the electrolytic water generation module (3) is operated at a low voltage, there is an effect of reducing the required power and extending the lifespan of the electrodes.

[0149] Figure 6 is a graph showing the pH concentration of water and the solubility of CaCO3, and Figure 7 is a graph showing the pH concentration of water and Mg 2+ , MgOH + This is a graph illustrating the correlation with the fraction of the back.

[0150] Referring to FIGS. 6 and 7, when an electrolytic water generator is operated using tap water, Ca2, a divalent cation in the water + , Ma2 + Components such as those mentioned above are formed on the surface of the cathode electrode as insoluble scale components as the solubility decreases as the pH of the alkaline water electrolytic cell of the electrolytic water generator increases.

[0151] To remove scale precipitated on the surface of the cathode electrode, the voltage applied to the anode and cathode of the electrolytic water generation module (3) is periodically alternately operated so that the first electrolytic cell (S1) and the second electrolytic cell (S2) are alternately operated to remove scale through reverse washing and alternating operation.

[0153] The operation for removing scale from the electrode surface is described in detail below.

[0154] FIG. 8a is a drawing illustrating the operation of an electrolytic water generation module (3) according to one embodiment of the present disclosure.

[0155] Referring to FIG. 8a, the polarity of the first electrode (37) and the second electrode (38) of the electrolytic water generation module (3) may be switchable between a positive potential and a reverse potential. For example, the water treatment device of the present disclosure may include a control unit that drives the first electrode (37) and the second electrode (38) of the electrolytic water generation module (3) by applying voltage or current.

[0156] The control unit can alternately perform a positive potential drive in which the polarity of the first electrode (37) and the second electrode (38) is driven to a positive potential, and a reverse potential drive in which the polarity of the first electrode (37) and the second electrode (38) is driven to a reverse potential.

[0157] For example, during the operation of the electrolytic water generation module (3), in the first cycle, the first electrode (37) can become the negative electrode and the second electrode (38) can become the positive electrode. In the second cycle that follows, the first electrode (37) can become the positive electrode and the second electrode (38) can become the negative electrode.

[0158] For example, a potential state in which the first electrode (37) becomes the negative electrode and the second electrode (38) becomes the positive electrode can be referred to as positive potential driving. Conversely, a potential state in which the first electrode (37) becomes the positive electrode and the second electrode (38) becomes the negative electrode can be referred to as reverse potential driving. However, the present disclosure is not limited thereto and can, of course, be referred to in the opposite way.

[0159] In this way, the electrolytic water generation module (3) can be driven by repeating positive potential driving and reverse potential driving. At this time, for example, electrolytic water can be generated during both positive potential driving and reverse potential driving. This can be referred to as symmetrical potential driving.

[0160] Electrolyzed water is generated when driven at a constant potential, and at least one operation of scale removal and cleaning can be performed when driven at a reverse potential.

[0161] When driving such symmetric potential, the first electrode (37) and the second electrode (38) may have the same structure. For example, both the first electrode (37) and the second electrode (38) may have a substrate metal layer (371) and a catalyst metal layer (372).

[0162] Meanwhile, as another example, electrolytic water can be generated only during either positive potential driving or reverse potential driving. This can be referred to as asymmetric potential driving.

[0163] When driving such asymmetric potential, the first electrode (37) and the second electrode (38) may have different structures. For example, either the first electrode (37) or the second electrode (38) may not include a catalyst metal layer (372).

[0164] The control unit can control the driving time of reverse potential driving to be shorter than the driving time of positive potential driving when driving asymmetric potential. Preferably, the driving time of reverse potential driving may be 0.1% to 0.2% of the driving time of positive potential driving.

[0165] In addition, the voltage or current during reverse potential driving may be smaller than the voltage or current during positive potential driving. Preferably, the voltage during reverse potential driving may be 20% to 50% of the voltage during positive potential driving.

[0166] Therefore, since the two electrodes use different configurations and the driving time of reverse potential driving during asymmetric potential driving is shorter than the driving time of positive potential driving, and the voltage or current during reverse potential driving is smaller than the voltage or current during positive potential driving, the current and voltage required for positive potential driving to generate electrolytic water are reduced, and the time for reverse potential driving is reduced, thereby increasing the time for generating electrolytic water, and thus the efficiency of generating electrolytic water is improved.

[0167] Of course, a rest period may be included between the positive potential drive and the reverse potential drive. The rest period is a time when power is not supplied to the first electrode (37) and the second electrode (38).

[0168] Referring to FIG. 8a, the polarity of the first electrode (37) and the second electrode (38) of the electrolytic water generation module (3) can be switched between a positive potential and a reverse potential, and can be driven in the form of a pulse when driving at a reverse potential.

[0169] When driving with reverse potential, reverse power is supplied to the electrode in the form of pulses to maximize the scaling effect.

[0171] FIG. 9 is a cross-sectional view illustrating the structure of an electrode of an electrolytic water generating module (3) according to another embodiment of the present disclosure.

[0172] Referring to FIG. 9, another water treatment device of another embodiment of the present disclosure includes a water softening module (2) that receives raw water and produces soft water, a brine generating module (5) that produces brine, and an electrolytic water generating module (3) that uses the brine generated in the brine generating module (5) to electrolyze the soft water generated in the water softening module (2) to produce electrolytic water.

[0173] In the case of the embodiment of Fig. 9 (second embodiment), compared to the embodiment of Fig. 3 (first embodiment), there is a difference in that the electrolytic water generation module (3) uses the brine generated in the brine generation module (5) to electrolyze the soft water generated in the soft water generation module (2) to produce electrolytic water.

[0174] In the following description of the second embodiment, the description of configurations identical to those of the first embodiment is omitted, and configurations not otherwise described are considered identical to those of the first embodiment.

[0175] Specifically, the electrolytic water generation module (3') comprises an electrolysis chamber (35') having an internal space, a separation membrane that selectively permeates ionic substances and divides the internal space of the electrolysis chamber (35') into a first electrolytic cell (S1), a second electrolytic cell (S2), and a brine tank (S3) between the first electrolytic cell (S1) and the second electrolytic cell (S2), a first electrode (37) disposed in the first electrolytic cell (S1), and a second electrode (38) disposed in the second electrolytic cell (S2) and having a polarity opposite to that of the first electrode (37).

[0176] The separator includes a first separator (39a) that separates the first electrolytic cell (S1) and the brine tank (S3), and a second separator (39b) that separates the second electrolytic cell (S2) and the brine tank (S3). The separator is an ion-permeable membrane, which selectively allows only ionic components to pass through.

[0177] The brine from the brine generation module (5) is supplied to the brine tank (S3), and the first electrolytic cell (S1) and the second electrolytic cell (S2) are supplied with raw water or soft water generated from the soft water generation module (2), respectively. To this end, the brine tank (S3) and the brine generation module (5) are connected by a brine flow path (115'). The brine tank (S3) may contain brine (water containing NaCl).

[0178] When electricity is applied to the positive and negative electrodes of the first electrode (37) and the second electrode (38), Cl in the central brine tank (S3) - Ions move to the first electrolytic cell (S1) through an ion-permeable membrane, water is decomposed to produce oxygen, and the water becomes acidic electrolytic water. The second electrolytic cell (S2), where the cathode is present, contains Na in the central brine tank (S3). + Ions move through an ion-permeable membrane to an alkaline electrolytic cell, and water is decomposed to produce hydrogen, turning the water into alkaline electrolyzed water.

[0180] Although preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above. Various modifications are possible by those skilled in the art without departing from the essence of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present disclosure.

[0181] The present disclosure may be modified and implemented in various forms, and its scope of rights is not limited to the embodiments described above. Therefore, if a modified embodiment includes the components of the claims of the present disclosure, it should be considered to fall within the scope of the present disclosure.

[0182] Some or other embodiments of the present disclosure described above are not exclusive or distinct from one another. Some or other embodiments of the present disclosure described above may be used in combination or combined for their respective configurations or functions.

[0183] For example, this means that configuration A described in a specific embodiment and / or drawing and configuration B described in another embodiment and / or drawing can be combined. That is, it means that even if the combination between configurations is not directly described, combination is possible except in cases where it is described that combination is impossible.

[0184] The foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the present disclosure shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present disclosure are included within the scope of the present disclosure. Explanation of the symbols

[0186] 1 : Cleaning module 2: Training Generation Module 3: Electrolyzed water generation module 4: Storage tank 5: Brine generation module 6: Control unit

Claims

Claim 1 An electrolysis chamber having an internal space; a diaphragm that divides the internal space of the electrolysis chamber into a first electrolytic cell and a second electrolytic cell, is impermeable to ionic substances, and allows electricity to flow; a first electrode disposed in the first electrolytic cell; and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode, wherein at least one of the first electrode and the second electrode comprises a substrate metal layer; and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer. Claim 2 In claim 1, the substrate metal layer comprises at least one of Ti, Ti oxide, and SUS, in an electrolytic water generation module. Claim 3 The electrolytic water generation module according to claim 1, wherein the catalyst metal layer comprises at least one of a group of materials including Ru, Ir, Pt, and Pd, and at least one of a group of materials including Ti, Ta, and Sn. Claim 4 The electrolytic water generation module according to claim 1, wherein the catalyst metal layer comprises an oxide of one of a group of materials including Ru, Ir, Pt, and Pd, and an oxide of one of a group of materials including Ti, Ta, and Sn. Claim 5 An electrolytic water generating module according to claim 4 or 5, wherein the ratio of the material in group 1 to the material in group 2 is 9 to 1 to 8 to 2. Claim 6 An electrolytic water generating module according to claim 1, wherein at least one of the first electrode and the second electrode further comprises a protective layer positioned between the substrate metal layer and the catalyst metal layer, and the protective layer is an oxide of at least one of Ti, Ta, and Sn. Claim 7 In claim 6, the thickness of the protective layer is thinner than the thickness of the substrate metal layer in the electrolytic water generation module. Claim 8 In claim 1, the substrate metal layer comprises Ti, and the catalyst metal layer comprises Pt and Ti, forming an electrolytic water generation module. Claim 9 In claim 4, an electrolytic water generating module in which the ratio of Pt to Ti in the catalytic metal layer is 9 to 1 to 8 to 2. Claim 10 In claim 8, the electrolytic water generation module further comprises a protective layer positioned between the substrate metal layer and the catalyst metal layer, wherein the protective layer is an oxide of Ti. Claim 11 In claim 1, any one of the first electrode and the second electrode comprises a substrate metal layer; and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer, and the other of the first electrode and the second electrode comprises a substrate metal layer, an electrolytic water generation module. Claim 12 In claim 1, the first electrode and the second electrode are an electrolytic water generating module having the same configuration as each other. Claim 13 The electrolytic water generating module according to claim 11 further comprises a control unit that drives the first electrode and the second electrode of the electrolytic water generating module by applying voltage or current, wherein the control unit alternately performs a positive potential drive in which the polarity of the first electrode and the second electrode is driven to a positive potential and a reverse potential drive in which the polarity of the first electrode and the second electrode is driven to a reverse potential, and wherein the driving time of the reverse potential drive is shorter than the driving time of the positive potential drive. Claim 14 An electrolytic water generation module according to claim 13, characterized in that the voltage or current during reverse potential driving is smaller than the voltage or current during positive potential driving. Claim 15 The electrolytic water generating module according to claim 12 further comprises a control unit that drives the first electrode and the second electrode of the electrolytic water generating module by applying voltage or current, wherein the control unit alternately performs a positive potential drive in which the polarity of the first electrode and the second electrode is driven to a positive potential and a reverse potential drive in which the polarity of the first electrode and the second electrode is driven to a reverse potential, and wherein the driving time of the reverse potential drive is the same as the driving time of the positive potential drive. Claim 16 An electrolysis chamber having an internal space; a separator membrane that selectively permeates ionic substances, which divides the internal space of the electrolysis chamber into a first electrolytic cell, a second electrolytic cell, and a brine tank between the first electrolytic cell and the second electrolytic cell; a first electrode disposed in the first electrolytic cell; and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode, wherein at least one of the first electrode and the second electrode comprises a substrate metal layer; and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer. Claim 17 In claim 16, the substrate metal layer comprises at least one of Ti, Ti oxide, and SUS, in an electrolytic water generation module. Claim 18 In claim 16, the catalyst metal layer comprises at least one of a group of materials including Ru, Ir, Pt, and Pd, and at least one of a group of materials including Ti, Ta, and Sn, in an electrolytic water generation module. Claim 19 A water treatment device comprising: a water softening module that receives raw water and generates soft water; a brine generation module that generates brine; and an electrolytic water generation module that generates electrolytic water by electrolyzing a mixed water in which the soft water generated in the water softening module and the brine generated in the brine generation module are mixed, wherein the electrolytic water generation module comprises: an electrolysis chamber having an internal space; a diaphragm that divides the internal space of the electrolysis chamber into a first electrolytic cell and a second electrolytic cell, is impermeable to ionic substances, and allows electricity to flow; a first electrode disposed in the first electrolytic cell; and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode, wherein at least one of the first electrode and the second electrode comprises a substrate metal layer; and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer. Claim 20 A water treatment device comprising: a water softening module that receives raw water and generates soft water; a brine generation module that generates brine; and an electrolytic water generation module that generates electrolytic water by electrolyzing the soft water generated in the water softening module using the brine generated in the brine generation module, wherein the electrolytic water generation module comprises: an electrolysis chamber having an internal space; a separation membrane that selectively permeates ionic substances and divides the internal space of the electrolysis chamber into a first electrolytic cell, a second electrolytic cell, and a brine tank between the first electrolytic cell and the second electrolytic cell; a first electrode disposed in the first electrolytic cell; and a second electrode disposed in the second electrolytic cell and having a polarity opposite to that of the first electrode, wherein at least one of the first electrode and the second electrode comprises a substrate metal layer; and a catalyst metal layer having a thickness thinner than the thickness of the substrate metal layer.

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