Dishwasher

Abstract

The present invention provides a dishwasher capable of automatically setting a hardness level for dishwashing in accordance with the hardness of washing water. The dishwasher controls a softening device on the basis of a hardness level, wherein when the hardness of the washing water and the hardness level do not match, the dishwasher automatically sets the hardness level so as to match with the hardness of the washing water.

Description

dishwasher

[0001] The present invention relates to a dishwasher, and more specifically, to a dishwasher capable of automatically setting a hardness level for dishwashing according to the hardness of the washing water.

[0002]

[0003] A dishwasher is a device that cleans dishes by automatically removing food residue stuck to the dishes through the spraying of washing water. More specifically, a nozzle positioned inside the dishwasher rotates and sprays washing water, and the sprayed washing water collides directly with the dishes, cleaning them through friction.

[0004] At this time, stains may remain on the dishes after washing is finished due to ions such as calcium and magnesium contained in the washing water sprayed onto the dishes. To solve the aforementioned problem, the dishwasher may be equipped with a water softening device that removes ions contained in the washing water.

[0005] Prior art 1 (publication number KR 10-2023-0144408) receives information regarding the hardness of washing water supplied to a dishwasher from a server, displays the received washing water hardness information on a mobile device, and recommends the use of a water softening device to the user based on the washing water hardness information.

[0006] However, since Prior Art 1 only displays information on the hardness of the washing water and does not adjust the hardness level for removing ions contained in the washing water, there was a problem in that stains remained on the dishes even after the dishwashing was finished if the hardness level initially set did not match the hardness of the washing water.

[0007]

[0008] The problem that the present invention aims to solve is to provide a dishwasher capable of automatically setting a hardness level for dishwashing according to the hardness of the washing water.

[0009] In addition, the present invention provides a dishwasher capable of collecting water quality data based on the user's residential area and automatically setting a hardness level for dishwashing according to the water quality data.

[0010] In addition, the present invention provides a dishwasher that collects water quality data of washing water in conjunction with a water purifier and can automatically set a hardness level for dishwashing according to the water quality data.

[0011] In addition, the present invention provides a dishwasher capable of sensing the hardness of supplied washing water and automatically setting a hardness level for dishwashing according to the sensed hardness of the washing water.

[0012] In addition, the present invention provides a dishwasher capable of improving washing efficiency by matching the hardness of the washing water and the hardness level for washing.

[0013] The problems to be solved according to one embodiment of this specification are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below.

[0014]

[0015] A dishwasher according to one embodiment of the present invention controls a water softening device based on a hardness level, and can automatically set the hardness level to match the hardness of the washing water when the hardness of the washing water and the hardness level do not match.

[0016] According to one embodiment, the dishwasher can receive the hardness of the washing water according to the user's residential area from a collection server that collects water quality data.

[0017] According to one embodiment, a dishwasher can receive the hardness of the washing water from a water purifier that includes a hardness sensor for detecting the hardness of the washing water.

[0018] According to one embodiment, the dishwasher may further include a hardness sensor to detect the hardness of the washing water.

[0019] According to one embodiment, a dishwasher can improve washing efficiency by automatically setting the hardness level to match the hardness of the washing water and determining the amount of salt added or the regeneration frequency based on the hardness level.

[0020]

[0021] As described above, the present invention can solve the problem of stains remaining on dishes after dishwashing is finished by automatically setting the hardness level for dishwashing according to the hardness of the washing water.

[0022] In addition, the present invention can collect water quality data based on the user's residential area and automatically set the hardness level for dishwashing according to the water quality data.

[0023] In addition, the present invention can collect water quality data of washing water in conjunction with a water purifier and automatically set the hardness level for dishwashing according to the water quality data.

[0024] In addition, the present invention can sense the hardness of the supplied washing water and automatically set the hardness level for dishwashing according to the sensed hardness of the washing water.

[0025] In addition, the present invention can improve washing efficiency by automatically matching the hardness of the washing water and the hardness level for washing when there is a difference between the hardness level set in the dishwasher and the hardness of the supplied washing water.

[0026] In addition, the present invention can completely remove stains remaining on dishes after dishwashing by matching the hardness of the washing water and the hardness level for washing.

[0027] In addition, the present invention can improve washing efficiency by determining the amount of salt added or the regeneration frequency based on a hardness level automatically set according to the hardness of the washing water.

[0028] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below.

[0029]

[0030] FIG. 1 is a front perspective view of a dishwasher according to one embodiment of the present invention.

[0031] Figure 2 is a schematic cross-sectional view of the dishwasher shown in Figure 1.

[0032] Figure 3 is a plan view showing the bottom surface of the tub in the dishwasher of Figure 1.

[0033] FIG. 4 is a front perspective view of a water jacket and a water softening device provided in a dishwasher according to one embodiment of the present invention.

[0034] Figure 5 is a rear perspective view of the water treatment device shown in Figure 4.

[0035] Figure 6 is a front perspective view of the water softening device shown in Figure 4.

[0036] Figure 7 is an exploded perspective view of the water softening device shown in Figure 6.

[0037] FIG. 8 is a block diagram showing a control device of a dishwasher according to one embodiment of the present invention.

[0038] FIG. 9 is a block diagram showing a control device of a dishwasher according to another embodiment of the present invention.

[0039] FIG. 10 is a block diagram showing a control device for a dishwasher according to another embodiment of the present invention.

[0040] FIGS. 11a, FIGS. 11b, and FIGS. 11c are flowcharts illustrating the control operation of a dishwasher according to one embodiment of the present invention.

[0041] FIG. 12 is a flowchart illustrating the control operation of a dishwasher according to another embodiment of the present invention.

[0042] FIG. 13 is a diagram illustrating the hardness range of washing water set at a hardness level in a dishwasher according to one embodiment of the present invention.

[0043] FIGS. 14 to 21 are drawings illustrating an automatic hardness level setting scenario in a dishwasher according to an embodiment of the present invention.

[0044]

[0045] The aforementioned objectives, features, and advantages are described in detail below with reference to the attached drawings, thereby enabling those skilled in the art to easily implement the technical concept of the present invention. In describing the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0046] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component.

[0047] The present invention is not limited to the embodiments disclosed below, but can be modified and implemented in various different forms. The embodiments provided are merely intended to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. Accordingly, the present invention should be understood not to be limited to the embodiments disclosed below, but to include all modifications, equivalents, and substitutions that fall within the technical spirit and scope of the present invention, as well as substituting or adding the configuration of one embodiment with the configuration of another embodiment.

[0048] The attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; rather, it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the invention. In the drawings, components may be depicted as being exaggeratedly large or small in size or thickness for the sake of convenience of understanding, but the scope of protection of the invention should not be interpreted restrictively as a result thereof.

[0049] The terms used in this specification are used merely to describe specific embodiments or examples and are not intended to limit the invention. Furthermore, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "includes" or "consists of" in this specification are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this specification. That is, terms such as "includes" or "consists of" in this specification should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0050] Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0051] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0052] When it is stated that one component is “above” or “below” another component, it should be understood that it is not only placed directly above the other component, but that another component may also exist in between.

[0053] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0054] Hereinafter, the overall structure of a dishwasher according to one embodiment of the present invention will be described in detail with reference to the attached drawings.

[0055] In this specification, unless otherwise stated, objects to be cleaned are referred to as tableware. Objects to be cleaned may be, for example, bowls, plates, spoons, chopsticks, and other cooking utensils.

[0056] In this specification, hardness may represent the ion concentration of calcium, magnesium, etc. dissolved in water.

[0057] In this specification, the automatic hardness level setting may be defined as a function that automatically sets the hardness level, which is an internal setting value of the dishwasher, according to the ion concentration of the wash water. For example, the dishwasher can set the hardness level according to the ion concentration of the wash water, and can regenerate the ion exchange resin of the water softener by controlling the amount of salt added or the regeneration frequency based on the set hardness level. [Overall structure of the dishwasher]

[0058] FIG. 1 is a front perspective view of a dishwasher according to one embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of the dishwasher shown in FIG. 1. FIG. 3 is a plan view showing the bottom surface of a tub in the dishwasher of FIG. 1.

[0059] Referring to FIGS. 1 and 2, a dishwasher (1) according to one embodiment of the present invention includes a case (10) forming an outer shape, a tub (20) installed inside the case (10) and forming a washing space (21) where dishes are washed and having an open front, and a door (30) that opens and closes the open front of the tub (20).

[0060] Additionally, the dishwasher (1) includes a drive unit (40) located at the bottom of the tub (20) for supplying, collecting, circulating, and draining washing water for washing dishes, a storage unit (50) detachably provided in the internal washing space (21) of the tub (20) for placing dishes, and a spray unit (60) installed adjacent to the storage unit (50) for spraying washing water for washing dishes.

[0061] A washing space (21) is formed inside the tub (20), and the open front is opened and closed by a door (30). On the inner side of the tub (20), a plurality of brackets are arranged so that functional components such as a storage unit (50), a spraying unit (60), etc., which will be described later, are supported and installed inside the tub (20).

[0062] The driving unit (40) includes a sump (41) for storing washing water, a sump cover (42) for separating the sump (41) from the tub (20), and a water supply unit (43) for supplying washing water to the sump (41) from the outside. Here, the water supply unit (43) includes a water supply pipe (431) for receiving washing water from an external water source and a water supply valve (432) for opening and closing the water supply pipe (431).

[0063] Additionally, the driving unit (40) includes a drainage unit (44) for discharging the washing water of the sump (41) to the outside, a washing water pump (45) and a supply channel (46) for supplying the washing water of the sump (41) to the spray unit (60), and a filter unit (47) disposed inside the sump (41) for filtering the washing water.

[0064] Additionally, although not illustrated, a water jacket is provided inside the case (10) to receive washing water supplied through a water supply pipe (431). The water jacket may be formed in the shape of a water container to receive washing water. For example, the water jacket is positioned to be in contact with the right side of the tub (20) and is placed between the tub (20) and the case (10).

[0065] The water jacket is connected to a water softener. The water softener reduces the limescale content of the supplied wash water, thereby minimizing the occurrence of stains on the objects after washing.

[0066] Additionally, the water softener is connected to the sump (14), and washing water from which limescale has been removed by the water softener is sprayed into the tub (20) to allow washing of dishes. For example, the water softener may be provided on the lower side of the tub (20).

[0067] Referring to FIG. 3, a water softener connection hole (255) may be formed through the lower surface (25) of the tub (20) into which a salt input port of the water softener device described later is inserted. Salt can be supplied to the inside of the water softener device through the salt input port of the salt input port exposed inside the tub (20) by passing through the water softener connection hole (255).

[0068] Referring again to FIG. 2, the drainage section (44) includes a drain pipe (441) having one end fluidly connected to a sump and the other end extending to the outside of the dishwasher (1), and a drain valve (442) for opening and closing the drain pipe. At this time, the drainage section (44) further includes a drain pump for forcibly draining the washing water to the outside during the washing or rinsing cycle.

[0069] The sump cover (42) is positioned above the sump (41). Additionally, the sump cover (42) is provided with a plurality of recovery holes to recover the washing water sprayed into the washing space (21) through the spraying unit (60) back into the sump (41).

[0070] The wash water pump (45) is provided on the side or bottom of the sump (41) and serves to pressurize the recovered wash water and resupply it to the spray unit (60). One end of the wash water pump (45) is connected to the sump (41), and the other end is connected to the supply channel (46). The wash water pump (45) may include an impeller (451) and a motor (453), etc. When power is supplied to the motor (453), the impeller (451) rotates, and the wash water in the sump (41) is pressurized and then supplied to the spray unit (60) via the supply channel (46).

[0071] The supply channel (46) serves to selectively supply washing water supplied from the washing water pump (45) to the spraying unit (60). For example, the supply channel (46) may include a first supply channel (461) connected to the lower spray arm (61), and a second supply channel (463) connected to the upper spray arm (62) and the top nozzle (63).

[0072] Additionally, the supply channel (46) may be equipped with a supply channel switching valve (465) that selectively opens and closes the supply channels (461, 463). Here, the supply channel switching valve (465) may be controlled so that each supply channel (461, 463) opens sequentially or simultaneously.

[0073] Additionally, the sump (41) may be equipped with a turbidity sensor (48) as a means for detecting the turbidity of the washing water stored inside the sump.

[0074] The spraying unit (60) sprays washing water onto dishes stored in the storage unit (50). This spraying unit (60) includes a lower spraying arm (61) located at the bottom of the tub (20) and spraying washing water onto a lower rack (51), an upper spraying arm (62) located between the lower rack (51) and the upper rack (52) and spraying washing water onto the lower rack (51) and the upper rack (52), and a top nozzle (63) located at the top of the tub (20) and spraying washing water onto a top rack (53) or an upper rack (52).

[0075] The lower spray arm (61) and the upper spray arm (62) are rotatably provided in the washing space (21) of the tub (20) so as to spray washing water while rotating toward the dishes in the storage unit (50). The lower spray arm (61) can be rotatably supported on the upper side of the sump cover (42) so as to spray washing water while rotating toward the lower rack (51) from the lower rack (51).

[0076] A hub (613) to which washing water is supplied from a first supply channel (461) may be provided at the bottom of the lower spray arm. The hub (613) may be rotatably supported by a lower spray arm holder (640) connected to a sump (41). Additionally, the upper spray arm (62) may be rotatably supported by an upper spray arm holder so that it can spray washing water while rotating between the lower rack (51) and the upper rack (52).

[0077] The washing space (21) is provided with a storage section (50) for storing tableware. The storage section (50) is provided so that it can be pulled out from inside the tub (20) through the open front of the tub (20).

[0078] The door (30) is intended to open and close the open front of the tub (20) described above. A hinge portion (not shown) for opening and closing the door (30) is provided at the bottom of the normally open front, and the door (30) opens as it rotates with the hinge portion as a rotation axis.

[0079] On the outer surface of the door (30), a handle (31) for opening the door (30) and a control panel (32) for controlling the dishwasher (1) may be provided. The control panel (32) may be provided with a display (33) that visually displays information regarding the current operating status of the dishwasher, and a button section (34) including a selection button for inputting a user's selection operation and a power button for inputting a user's operation to turn the dishwasher on and off.

[0080] The inner surface of the door (30) forms one side of the tub (20) when the door (30) is closed, and at the same time forms a seating surface that can support the lower rack (51) of the storage unit (50) when the door (30) is fully opened.

[0081] Although not shown, the door may be further equipped with a detergent supply unit for storing detergent to be used in the washing process and rinse to be used in the rinsing process, and for automatically discharging them into the washing space (21).

[0082] A door automatic opening module (352) for automatically opening a door may be provided on the outer side of the upper surface of the tub (20).

[0083] The automatic door opening module (352) serves to move the door (30) to a predetermined opening position and partially open the front (22) of the tub (20) when the drying air supply unit (80) is operated and drying air is supplied into the interior of the tub (20). The humidified air from drying the dishes can be discharged through the upper side of the front (22) of the opened tub (20). Additionally, the automatic door opening module (352) may be equipped with a push rod (3524) that rotates the upper rear portion of the door (30) to an opening position.

[0084] A drying air supply unit (80) for generating and supplying high or low temperature drying air into the cleaning space inside the tub (20) may be provided at the bottom of the tub (20). The drying air supply unit (80) may include a filter member (883) for filtering external air, a blower fan (825) for generating a drying air stream, a heater (84) for heating the drying air stream, and an airflow guide (83) that is placed inside the tub and guides the drying air stream. A drying air supply hole (254) may be provided at the bottom surface of the tub (20) so that the high temperature drying air generated by the drying air supply unit can be introduced into the interior of the tub (20).

[0085] [Detailed Configuration of Water Jacket and Water Training Device]

[0086] FIG. 4 is a front perspective view of a water jacket (71) and a water softening device (72) provided in a dishwasher according to an embodiment of the present invention. FIG. 5 is a rear perspective view of the water softening device shown in FIG. 4. FIG. 6 is a front perspective view of the water softening device shown in FIG. 4. FIG. 7 is an exploded perspective view of the water softening device shown in FIG. 6.

[0087] Referring to FIGS. 4 to 7, the water jacket (71) can be formed with a thin and wide thickness so as to be placed inside the side wall of the case (10), for example, the right wall, and can be formed as a plate that can be in contact with the right side of the tub (20).

[0088] A space capable of accommodating washing water is formed inside the water jacket (71), and a flow path can be formed so that the washing water flowing into the water jacket (71) is directed toward the water softening device (72).

[0089] The water jacket (71) can perform the function of storing washing water and the function of selectively supplying water to the water softening device (72). Additionally, the water jacket (71) may be configured so that when high-temperature washing water is drained, the drained washing water passes through the water jacket (71) to heat the stored washing water.

[0090] Additionally, the water jacket (71) can shorten the drying time by condensing the water vapor of the tub (20) using the stored cold washing water during the drying process after the end of the washing process. Therefore, the water jacket (71) may be referred to as a water tank, an air brake, or a reuse tank.

[0091] The water jacket (71) includes a space for storing wash water and a water jacket body (711) that forms a flow path with the sump (14) and the water softening device (72).

[0092] A water supply connection part (712) may be formed in the water jacket body (711) and connected to a water supply pipe (431, FIG. 2) that receives washing water from an external water source. A water supply valve (7154) may be provided in the water supply connection part (712) or in the water supply pipe (431) connected to the water supply connection part (712) to control the water supply to the water jacket (71).

[0093] A drain connection (713) may be formed on one side of the bottom of the water jacket (71) to receive water drained from the sump (14) after the completion of the washing process. Additionally, a drain hose connection (714) connected to a drain hose may be formed to drain water within the water jacket.

[0094] A plurality of connection parts (715) connected to a water softening device (72) may be formed on the other side of the bottom of the water jacket (71). Here, the connection part (715) may include an inlet connection part (7151) for supplying water to the water softening device (72), a recovery connection part (7152) for recovering water that has passed through the water softening device (72) back into the water jacket (71), and an outlet connection part (7153) for supplying washing water inside the water jacket (71) to the sump (14) by passing through the water softening device (72).

[0095] The inlet connection (7151), the recovery connection (7152), and the outlet connection (7153) can be arranged sequentially and continuously along the bottom of the water jacket (71).

[0096] Additionally, the inlet connection part (7151), the recovery connection part (7152), and the outlet connection part (7153) can be formed to protrude at the same height and can be simultaneously inserted and coupled to the inlet port (7221), the recovery port (7222), and the outlet port (7223) formed in the water softening device (72).

[0097] The water softening device (72) performs the function of softening the washing water supplied to the tub (20) and can be manufactured in a shape that can be accommodated in the lower part of the tub (20).

[0098] Referring to FIGS. 5 to 7, the water softening device (72) may include a tank body (721) forming a space for water to be received, a tank cover (722) covering an open upper surface of the tank body (721), and a tank base (723) covering an open lower surface of the tank body (721).

[0099] The interior of the tank body (721) constituting the water softening device (72) can be divided into left and right sides to form a regeneration tank (725) and an exchange tank (726). The exchange tank (726) can form a space for accommodating an ion exchange resin for softening the incoming washing water.

[0100] The exchange tank (726) is positioned inside the tank body (721) and may be formed with an open top and bottom surface. The exchange tank (726) may be provided in a cylindrical shape on one side of the tank body (721), and a space for accommodating ion exchange resin and washing water may be formed inside the cylindrical shape.

[0101] A tank cover (722) on the upper side and a tank base (723) on the lower side are respectively mounted on the tank body (721) to form the upper and lower surfaces of the exchange tank (726). The open upper and lower surfaces of the exchange tank (726) formed in the tank body (721) can be shielded by the tank cover (722) and the tank body (721).

[0102] A filtering member (7261) may be provided inside the exchange tank (726). The filtering member (7261) may be formed in a shape corresponding to the cross-sectional area of ​​the exchange tank (726). For example, the filtering member (7261) may be formed in a disc shape and may be formed to have a diameter corresponding to the diameter of the cross-section of the exchange tank (726). The exchange tank (726) may be mounted to divide or partition the interior of the exchange tank (726).

[0103] A plurality of filtering holes (7261a) may be formed in the filtering member (7261). A plurality of filtering holes (7261a) may be formed radially with respect to the center of the filtering member (7261). The filtering holes (7261a) may be formed smaller than the size of the ion exchange resin so that the ion exchange resin does not pass through but the washing water can pass through freely.

[0104] A plurality of inner ribs (7262) formed to protrude inwardly may be provided on the inner surface of the exchange tank (726). The inner ribs (7262) may extend along the vertical direction, and a plurality of them may be arranged at equal intervals along the inner surface of the exchange tank.

[0105] The lower end of the inner rib (7262) may be formed to protrude inward at a position spaced upward from the lower end of the exchange tank (726). The lower end of the inner rib (7262) may restrain the filtering member (7261) from the upper side. Thus, the filtering member (7261) divides the exchange tank (726) vertically, and the filtering member (7261) may be located at the lower end of the exchange tank (726).

[0106] An ion exchange resin may be accommodated in the lower part of the exchange tank (726) partitioned by the filtering member (7261). The ion exchange resin performs the function of converting hard water contained inside the exchange tank (726) into soft water.

[0107] A regeneration tank (725) may be formed on the side of the exchange tank (726). The regeneration tank (725) may be formed on the inner side of the tank body (721) at a position spaced apart along the horizontal direction from the exchange tank (726). The regeneration tank (725) may contain salt in its internal space and may form a space for storing salt water for the regeneration of the ion exchange resin.

[0108] A regeneration tank (725) may have a space for storing brine formed by a tank body (721) with an open top and bottom surface. By shielding the open top and bottom surfaces of the tank body (721) by a tank cover (722) and a tank base (723), the top and bottom surfaces of the regeneration tank (725) may be formed.

[0109] Inside the regeneration tank (725), a salt plate (7254) on which salt supplied through the salt inlet (7224h) is stacked may be provided. The salt plate (7254) may be formed separately from the bottom surface (7233) of the regeneration tank or formed integrally with the bottom surface (7233) of the regeneration tank.

[0110] The regeneration tank (725) may be equipped with a concentration detection device (724) for detecting the concentration of salt water contained inside the regeneration tank (725). The concentration detection device (724) may be configured to include a floater (7241) provided inside the regeneration tank (725) and a detection sensor (104) mounted on the outside of the regeneration tank (725).

[0111] The floater (7241) can be formed of a material that can float in saltwater and may have a magnet embedded in it. The floater (7241) can be received in a floater guide (7251) formed on the inner side of the tank body (721) and can be mounted so as to be movable up and down along the floater guide (7251).

[0112] A sensor mounting portion (7252) may be formed on the outer surface of the tank body (721) at a position corresponding to the bottom of the plotter guide (7251) to which a detection sensor (104) is mounted. The sensor mounting portion (7252) is recessed from the outside, and the detection sensor (104) may be inserted and mounted. For example, the detection sensor (104) may be composed of a Hall sensor that detects a magnet and may be configured to detect a magnet embedded in the plotter (7241).

[0113] When the salt concentration inside the regeneration tank (725) becomes below the set concentration, the floater (7241) may sink and move to the position of the detection sensor (104), and the detection sensor (104) may detect this and detect that the salt concentration in the regeneration tank (725) has become below the set concentration.

[0114] The salt water is used for the regeneration of the ion exchange resin and may also be called regeneration water. If the concentration of the salt water falls below the set concentration, the regeneration ability of the ion exchange resin may decrease. It is necessary to ensure that the concentration of the salt water inside the regeneration tank (725) is maintained above the set concentration through detection by the detection sensor (104).

[0115] A controller electrically connected to a detection sensor (104) can generate a message or alarm to inform the user that the salt concentration of the regeneration tank (725) is below a set concentration through other output devices such as a display or speaker, depending on the detection of the detection sensor (104), thereby inducing the user to replenish the salt.

[0116] For such salt replenishment, a salt inlet (7224h) communicating with the regeneration tank (725) may be formed in the tank cover (722). The salt inlet (7224h) may be formed inside a salt input port (7224) for connecting the regeneration tank (725) and the water softener communication hole (255) of the tub (20).

[0117] An inlet cover (7225) for opening and closing the salt inlet (7224h) may be detachably attached to the salt inlet (7224h). The inlet cover (7225) may be exposed to the interior of the tub (20), and when the inlet cover (7225) is removed from the salt inlet port (7224), the salt inlet (7224h) may be exposed to the interior of the tub (20). The user can replenish salt to the interior of the regeneration tank (725) through the exposed salt inlet (7224h).

[0118] The water softening device (72) may be equipped with an inlet path (7271) that supplies water from the water jacket (71) toward the regeneration tank (725) and the exchange tank (726), a recovery path (7272) that guides water passing through the exchange tank (726) toward the water jacket, and an outlet path (7273) that directs water discharged from the water jacket (71) toward the sump (14).

[0119] The discharge channel (7273), the inlet channel (7271), and the recovery channel (7272) can be formed in the tank body (721) and can be arranged side by side. That is, the discharge channel (473), the inlet channel (7271), and the recovery channel (7272) can be arranged side by side and formed so that their sides are in contact with each other. A portion of the tank body (721) may be configured to be divided into multiple parts to form the discharge channel (7273), the inlet channel (7271), and the recovery channel (7272).

[0120] The discharge channel (7273), inlet channel (7271), and recovery channel (7272) can be formed between the regeneration tank (725) and the exchange tank (726), and can have a structure that protrudes outward and can be connected to the bottom of the connection part (715) of the water jacket (71).

[0121] A portion of the discharge channel (7273), inlet channel (7271), and recovery channel (7272) may protrude from the outer surface of the tank body (721), and a channel supporter (7212) may be formed in the tank body (721) to support the protruding discharge channel (7273), inlet channel (7271), and recovery channel (7272) from below. The channel supporter (7212) may support the channels (471, 472, 473) by connecting the outer surface of the tank body (721) and the lower surface of the channels (471, 472, 473), respectively.

[0122] The inlet water channel (7271) is connected to the inlet port (7221) and the inlet connection part (7151), the recovery water channel (7272) is connected to the recovery port (7222) and the recovery connection part (7152), and the outlet water channel (7273) is connected to the outlet port (7223) and the outlet connection part (7153) to form a water channel connected between the water jacket (71) and the water softening device (72).

[0123] A water outlet (7211) may be formed in the tank body (721) that communicates with the end of the water outlet flow path (7273). The water outlet (7211) may be formed protruding from the outer circumference of the tank body (721) and may have a structure in which a pipe connected to the sump (14) is connected.

[0124] Additionally, a connecting channel (728) connecting the regeneration tank (725) and the exchange tank (726) may be formed in the tank body (721), and a check valve (7281) may be provided in the connecting channel (728). The check valve (7281) has a structure that opens and closes in one direction to allow saltwater to move from the regeneration tank (725) to the exchange tank (726), and may be mounted on the inside of the connecting channel (728).

[0125] The connecting channel (728) extends from the top to the bottom of the tank body (721), and the top and bottom surfaces may be open. The top of the connecting channel (728) may be in communication with the exchange tank (726) by the tank cover (722). The bottom of the connecting channel (728) may be in communication with the regeneration tank (725) by the tank base (723). A first base channel (7231) may be formed in the tank base (723) to connect the bottom of the connecting channel (728) and the inside of the regeneration tank (725).

[0126] A second base channel (7232) may be formed in the tank base (723) to direct the cleaning water flowing in through the inlet channel (7271) toward the exchange tank (726). The cleaning water flowing into the exchange tank (726) through the connection channel (728) may flow into the lower part of the exchange tank (726) through the second base channel (7232).

[0127] A regeneration tank bottom surface (7233) may be formed on the tank base (723) to be coupled to the perimeter of the open bottom surface of the tank body (721) corresponding to the regeneration tank (725) and to shield the open bottom surface of the regeneration tank (725).

[0128] Additionally, the tank base (723) may have a replacement tank bottom surface (7234) formed thereon that is coupled to the perimeter of the open bottom surface of the tank body (721) corresponding to the replacement tank (726) and shields the open bottom surface of the replacement tank (726).

[0129] A switching valve (73) may be mounted on one side of the tank body (721). The switching valve (73) performs the function of switching the flow path so that water flowing in through the inlet flow path (7271) is selectively flowed into the regeneration tank (45) or the exchange tank (726). For example, the switching valve (73) may be implemented as a solenoid valve.

[0130] Water introduced into the inlet water channel (7271) by the operation of the switching valve (73) can flow into the regeneration tank (725) or the inlet water channel (7271). The path through which water flows inside the water softening device (72) can be switched to the regeneration channel or the general channel by the switching valve (73).

[0131] [Dishwasher Control Devices and Operation]

[0132] FIG. 8 is a block diagram showing a control device of a dishwasher according to one embodiment of the present invention.

[0133] Referring to FIG. 8, a dishwasher (1) according to one embodiment communicates with a collection server (4) to receive water quality information of a customer's residential area from the collection server (4). The dishwasher (1) compares the water hardness of the customer's residential area received from the collection server (4) with a preset hardness level, and if the water hardness of the water does not match the preset hardness level, it automatically sets the hardness level to match the water hardness of the water.

[0134] The dishwasher (1) includes a communication device (101), a controller (102), a memory (103), and a detection sensor (104).

[0135] The communication device (101) can communicate with the collection server (4) and the user terminal (5). The communication device (101) can receive water quality information of the customer's residential area from the collection server (4). The water quality information may include the hardness of the water supply in the customer's residential area as water quality data.

[0136] For example, the collection server (4) can collect information about the customer's residential area from the user terminal (5). Based on the collected information about the customer's residential area, the collection server (4) can collect water quality data from the public data portal API (301) of the water supply system (3).

[0137] When the public data portal API (301) receives a request for water quality information of a customer's residential area from the collection server (4), it can obtain water quality information of the customer's residential area by utilizing water purification plants and water quality information of the water purification plants by region, and can provide the obtained water quality information of the customer's residential area to the collection server (4).

[0138] In addition, the communication device (101) can perform functions such as transmitting and receiving data, storing downloaded software, setting software upgrade schedules, and tracking upgrade reservation times.

[0139] The communicator (101) can receive water quality data from the collection server (4) and transmit the received water quality data to the controller (102). Additionally, the communicator (101) may include at least one of program data having upgraded functions from a management server (not shown) and commands executed by the controller (102).

[0140] The communication device (101) may include a radio frequency transmitter / receiver, an infrared port, a USB connection, or other interfaces. For example, the communication device (160) may include a short-range communication module that transmits and receives signals according to a communication standard such as Wi-Fi or Bluetooth.

[0141] The memory (103) can store water quality data received from the collection server (4). Additionally, the memory (103) can store at least one of program data and commands received from the management server. For example, the memory (103) may be a non-volatile memory.

[0142] The communication device (101) can transmit a signal to the outside under the control of the controller (102). Additionally, the communication device (101) can receive a signal from the outside and output the received signal to the controller (102). The communication device (101) can transmit and receive signals via wired or wireless means. The communication device (101) may include a modem, a network interface card, an integrated network interface, a radio frequency transmitter / receiver, an infrared port, a USB connection, or other interfaces for communication with other computing devices.

[0143] The communication method between the dishwasher (1) and the collection server (4) may differ from the communication method between the dishwasher (1) and other home appliances.

[0144] The memory (130) can store data received through the communication device (101) under the control of the controller (102) and can store data processed by the controller (102). For example, the memory (130) can store at least one of user identification information, identification information of the dishwasher (1) associated with the user identification information, program data for each version of the dishwasher (1), and delta data derived from the result of comparing the program data of each previous version with the program data of the latest version.

[0145] The controller (102) can control the water softening device (72) based on a preset hardness level. The controller (102) can determine when to regenerate the ion exchange resin based on the hardness level. For example, the controller (102) can regenerate the ion exchange resin by automatically controlling the amount of salt added or the regeneration frequency based on the hardness level. Accordingly, the water softening device (72) can soften the washing water supplied to the tub (20) under the control of the controller (102).

[0146] The controller (102) can compare the hardness of the water supply in the customer's residential area received from the communicator (101) with a preset hardness level. If the hardness of the water supply does not match the preset hardness level, the controller (102) can automatically set the hardness level to match the hardness of the washing water.

[0147] If the hardness of the water supply does not match the preset hardness level, the controller (102) can guide and recommend automatic hardness level setting through an application installed on the user terminal (5). The application installed on the user terminal (5) may provide a menu for directly selecting the hardness level, or a selection menu for automatically matching the hardness of the water supply in the received customer's residential area. The updated useful features of the dishwasher can be updated through product program upgrades.

[0148] The controller (102) can compare the hardness of the tap water with a preset hardness level at a preset interval. For example, the controller (102) can compare the hardness of the tap water with the hardness level at a 3-month interval. Alternatively, the controller (102) can compare the hardness of the tap water with the hardness level at the end of each course operation. Alternatively, the controller (102) can compare the hardness of the tap water with the hardness level at a preset interval of dishwashing.

[0149] The controller (102) may include at least one processing unit. Here, the processing unit may include, for example, a central processing unit (CPU), a graphics processing unit (GPU), a microprocessor, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), etc., and may have multiple cores.

[0150] The detection sensor (104) may be mounted on the outer surface of the tank body (721) of the water softening device (72) at a position corresponding to the bottom of the plotter guide (7251). For example, the detection sensor (104) may be configured as a Hall sensor that detects a magnet and may be configured to detect a magnet embedded in the plotter (7241).

[0151] The detection sensor (104) can detect the state in which the salt water concentration in the regeneration tank (725) has become below the set concentration by detecting the floater (7241) that sinks to the position of the detection sensor (104) when the salt water concentration inside the regeneration tank (725) becomes below the set concentration.

[0152] The controller (102) can generate a message or alarm to inform the user that the salt concentration of the regeneration tank (725) is below a set concentration through other output devices such as a display or speaker, based on the detection of the detection sensor (104), thereby inducing the user to replenish the salt. Additionally, the controller (102) can guide the user to replenish the salt through an application of a home appliance installed on the user terminal (5), based on the detection of the detection sensor (104).

[0153] FIG. 9 is a block diagram showing a control device of a dishwasher according to another embodiment of the present invention. In the description of FIG. 9, the same configuration as in FIG. 8 is replaced with the description of FIG. 8.

[0154] Referring to FIG. 9, a dishwasher (1) according to another embodiment communicates with a water purifier (2) to receive water hardness from the water purifier (2). The dishwasher (1) compares the water hardness received from the water purifier (2) with the hardness level, and if the water hardness and the hardness level do not match, it automatically sets the hardness level to match the water hardness.

[0155] The dishwasher (1) includes a communication device (101), a controller (102), a memory (103), and a detection sensor (104).

[0156] The communication device (101) can communicate with the water purifier (2) and the user terminal (5). The communication device (101) can receive water quality data from the water purifier (2). The water quality data may include the hardness of the supplied water. The water purifier (2) may include a communication device (201), a controller (202), and a hardness sensor (204). The water purifier (2) can sense the hardness of the supplied water through the hardness sensor (204) and provide the water hardness to the dishwasher (1) through the communication device (202). The hardness sensor (204) may be installed in the water supply pipe of the water purifier (2) to which tap water is supplied.

[0157] The communication device (101) can receive water quality data from the water purifier (2) and transmit the water quality data to the controller (102).

[0158] The controller (102) can compare the water hardness received from the communication device (101) with a preset hardness level. If the water hardness and the preset hardness level do not match, the controller (102) can automatically adjust the hardness level to match the hardness of the washing water.

[0159] In addition, if the water hardness and the preset hardness level do not match, the controller (102) can guide and recommend automatic hardness level setting through an application installed on the user terminal (5).

[0160] The controller (102) can compare the water hardness received from the water purifier (2) with a preset hardness level at a preset interval. For example, the controller (102) can compare the water hardness and the hardness level at a 3-month interval. Alternatively, the controller (102) can compare the water hardness and the hardness level at the end of each course operation. Alternatively, the controller (102) can compare the water hardness and the hardness level at a set number of dishwashing cycles. Of course, the preset interval is not limited to the above, and the preset interval can be changed.

[0161] FIG. 10 is a block diagram showing a control device of a dishwasher according to another embodiment of the present invention. In the description of FIG. 10, configurations identical to those in FIG. 8 or FIG. 9 are replaced with the descriptions of FIG. 8 and FIG. 9.

[0162] Referring to FIG. 10, a dishwasher (1) according to another embodiment includes a hardness sensor (105). The dishwasher (1) senses the hardness of water through the hardness sensor (105) and compares the sensed hardness of water with a preset hardness level. If the sensed hardness of water and the hardness level do not match, the dishwasher (1) automatically sets the hardness level to match the hardness of water.

[0163] The hardness sensor (105) can be installed in a water supply pipe (431) that receives washing water from an external water source.

[0164] The hardness sensor (105) can sense the hardness of the water flowing into the water supply pipe (431) and provide the sensed hardness to the controller (102).

[0165] The controller (102) compares the water hardness received from the hardness sensor (105) with a preset hardness level, and if the water hardness and the hardness level do not match, it can automatically adjust the hardness level to match the hardness of the washing water. Additionally, if the water hardness and the preset hardness level do not match, the controller (102) can guide and recommend automatic hardness level setting through an application installed on the user terminal (5).

[0166] The hardness level can be divided into multiple levels, and a corresponding hardness range of the washing water can be set for each of the multiple levels.

[0167] The controller (102) can determine the amount of salt to be added or the regeneration frequency for the regeneration of the ion exchange resin based on the hardness level. Here, the regeneration frequency can be defined as the salt addition cycle. For example, the controller (102) can reduce the amount of salt added at once or set the salt addition cycle longer as the hardness level decreases. Additionally, the controller (102) can increase the amount of salt added at once or set the salt addition cycle shorter as the hardness level increases. In this way, the dishwasher according to one embodiment can optimize the regeneration performance of the water softener by automatically setting the hardness level according to the hardness of the washing water, and thereby improve washing performance.

[0168] Additionally, the controller (102) can predict the amount of salt consumed based on the hardness level and adjust the timing of the salt replenishment guidance. For example, the controller (102) can adjust the timing of the salt replenishment guidance to be longer than the reference time as the hardness level decreases, and adjust the timing of the salt replenishment guidance to be shorter than the reference time as the hardness level increases. The controller (102) can control the water softening device (72) to allow salt water to flow in based on the hardness level. Specifically, a connecting channel (728) connecting the regeneration tank (725) and the exchange tank (726) may be formed in the tank body (721) of the water softening device, and a check valve (7281) may be provided in the connecting channel (728). The check valve (7281) has a structure that opens and closes in one direction to allow salt water to move from the regeneration tank (725) to the exchange tank (726), and may be mounted on the inside of the connecting channel (728). The controller (102) can move the brine from the regeneration tank (725) to the exchange tank (726) by controlling the check valve (7281) based on the hardness level.

[0169] FIGS. 11a, FIGS. 11b, and FIGS. 11c are flowcharts illustrating the control operation of a dishwasher according to an embodiment of the present invention. The dishwasher (1) communicates with a user terminal (5) and can guide and recommend automatic hardness level setting through an application installed on the user terminal (5).

[0170] Referring to FIGS. 11a, 11b, and 11c, the dishwasher (1) receives customer information settings from a user terminal (5) (S1). The customer information settings may include the same information settings and a question regarding whether to use water supply.

[0171] When the dishwasher (1) uses tap water (S2), it checks for the passage of a certain period (S3) and turns on the hardness level automatic setting every time a certain period passes (S4).

[0172] The dishwasher (1) checks whether salt has been refilled (S5), and if it is a customer with salt refills (S6), it compares the water purification plant hardness with the customer's set hardness level (S7). Here, the check for salt refills can be performed using a concentration detection device (724) that detects the concentration of the salt water contained inside the regeneration tank (725). For example, the dishwasher (10) can recognize the customer with salt refills if the concentration of the salt water is detected to exceed the set concentration through the concentration detection device (724), and can recognize the customer without salt refills if the concentration of the salt water is detected to be below the set concentration.

[0173] When the water purification plant hardness and the customer-set hardness level match (S8), the dishwasher (1) provides a message saying “It is working well” (S9). When the water purification plant hardness and the customer-set hardness level do not match (S10), the dishwasher (1) explains the current hardness level and provides a message for automatic hardness level setting (S11).

[0174] When the dishwasher (1) provides guidance on the automatic hardness level setting, it can provide guidance through the application of the user terminal (5) asking, “Would you like to set the hardness level automatically now?” (S12).

[0175] If the user selects automatic setting now, the dishwasher (1) automatically sets the hardness level to match the hardness of the washing water (S13). Additionally, if the user does not select automatic setting now, the dishwasher (1) automatically sets the hardness level to match the hardness of the washing water after the end of the next course of the dishwashing process (S14).

[0176] In addition, the dishwasher (1) compares the water purification plant hardness with the customer-set hardness level (S16) in the case of a customer who has not charged salt (S15).

[0177] When the water purification plant hardness and the customer-set hardness level match (S17), the dishwasher (1) provides a message saying “It is working well” (S18). When the water purification plant hardness and the customer-set hardness level do not match (S19), the dishwasher (1) explains the current hardness level and provides a message for automatic hardness level setting (S20).

[0178] When the dishwasher (1) provides guidance on the automatic hardness level setting, it asks, “Would you like to set the hardness level automatically now?” through the application of the user terminal (5) (S22).

[0179] If the user selects automatic settings now, the dishwasher (1) provides instructions for salt refilling and recommends a link to the consumable salt (S23). Additionally, if the user does not select automatic settings now, the dishwasher (1) automatically sets the hardness level to match the hardness of the washing water after the end of the next course of the dishwashing process (S24).

[0180] The dishwasher (1) turns off the automatic hardness level setting when a certain period has not elapsed (S25). The dishwasher (1) checks whether salt is charged (S26), and if it is a customer who charges salt (S27), it compares the water purification plant hardness with the customer-set hardness level (S28).

[0181] If the water purification plant hardness and the customer-set hardness level match (S29), the dishwasher (1) provides a message saying “It is working well” (S30). If the water purification plant hardness and the customer-set hardness level do not match (S31), the dishwasher (1) explains the current hardness level (S32).

[0182] Additionally, if the customer is not refilled with salt (S33), the dishwasher (1) compares the water purification plant hardness with the customer-set hardness level (S34). If the water purification plant hardness and the customer-set hardness level match (S35), the dishwasher (1) provides a message saying “I am using it well” (S37), provides a message to refill the salt, and recommends a link to the consumable salt (S38).

[0183] In addition, if the water purification hardness and the customer-set hardness level do not match (S36), the dishwasher (1) explains the current hardness level (S39), guides the salt refill, and recommends a link to the consumable salt (S40).

[0184] In addition, the dishwasher (1) can inform customers that the automatic water hardness level setting function is unavailable if they do not use tap water (S41) (S42).

[0185] FIG. 12 is a flowchart illustrating the control operation of a dishwasher according to another embodiment of the present invention. The dishwasher (1) communicates with a user terminal (5) and can guide and recommend automatic hardness level setting through an application installed on the user terminal (5).

[0186] Referring to FIG. 12, the dishwasher (1) can check whether a certain period has elapsed (S101). For example, the certain period can be set in 3-month increments to check the water hardness by season. Or the certain period can be set to a certain number of dishwashing cycles. Or the certain period can be set to one dishwashing cycle. Of course, it is not limited to this, and the certain period can be changed by the customer or manager.

[0187] The dishwasher (1) turns on the hardness level automatic setting every time a certain period elapses (S102) and compares the hardness of the washing water with the set hardness level (S103). The dishwasher (1) checks whether there is a discrepancy between the hardness of the washing water and the set hardness level (S104), and if there is a discrepancy between the hardness of the washing water and the set hardness level, explains the current hardness level of the washing water and guides the hardness level automatic setting (S105).

[0188] The dishwasher (1) checks whether it receives the hardness level automatic setting from the user terminal (5) (S106), and if the hardness level automatic setting is received, it automatically sets the hardness level to the hardness of the washing water (S107). If the hardness level automatic setting is not received, the dishwasher (1) automatically sets the hardness level to the hardness of the washing water after the washing course ends (S108).

[0189] In addition, the dishwasher (1) indicates that “the hardness level is set correctly according to the hardness of the washing water” when the washing water hardness and the set hardness level match (S109).

[0190] In addition, the dishwasher (1) checks whether salt refilling is needed through the detection sensor (104) (S110), and if it is confirmed that salt refilling is needed, it informs the customer to refill the salt (S111).

[0191] FIG. 13 is a diagram illustrating the hardness range of washing water set at a hardness level in a dishwasher according to one embodiment of the present invention.

[0192] Referring to FIG. 13, the hardness level can be divided into multiple hardness levels, and a corresponding hardness range can be set for each hardness level. For example, the hardness level can be divided into 0, 1, 2, 3, and 4 levels. A hardness range of 0 to 75 can be set for hardness level 0, a hardness range of 75 to 125 can be set for hardness level 1, a hardness range of 125 to 250 can be set for hardness level 2, a hardness range of 250 to 250 can be set for hardness level 3, and a hardness range of 375 or higher can be set for hardness level 4.

[0193] The dishwasher compares the hardness of the customer's residential area with a preset hardness level at regular intervals, and if the hardness of the customer's residential area does not fall within the hardness range corresponding to the preset hardness level, it can automatically set the hardness level to match the hardness of the residential area.

[0194] FIGS. 14 to 21 illustrate a scenario for automatic hardness level setting in a dishwasher according to an embodiment of the present invention. A customer can set the functions of the dishwasher through an application installed on a user terminal (5).

[0195] Figure 14 illustrates a water hardness level recommendation selection screen. Referring to Figure 14, a “water hardness level recommendation” item may be displayed in the useful functions of the dishwasher. Along with the “water hardness level recommendation” item, a notice may be displayed stating, “You can optimize the performance of the water softener by matching the water hardness levels of the water purification plant and the product.”

[0196] Figure 15 illustrates a settings screen for using the recommended water hardness level. Referring to Figure 15, a location selection item may be displayed on the settings screen. Additionally, the message “To use this feature, you must be in an area that does not use groundwater. To find out if groundwater is used, please contact the manager of the residential complex or area.” may be displayed on the settings screen. Additionally, a “Do not use groundwater” check screen may be displayed.

[0197] FIG. 16 illustrates a location information input screen. FIG. 17 illustrates a user selecting a location on the location information input screen and saving it on the settings screen. Referring to FIG. 16 and FIG. 17, the customer can select the location of the area where the dishwasher is installed on the map displayed on the screen.

[0198] Figure 18 illustrates a screen displayed when the water hardness level of the water purification plant matches the water hardness level of the product. Referring to Figure 18, when the water hardness level of the water purification plant matches the water hardness level of the product, the phrase “The product water hardness level is suitable” may be displayed.

[0199] In addition, if salt replenishment is good, "Good" may be checked and displayed.

[0200] In addition, the water hardness level of the water purification plant may be indicated as “2 (replenish 1 kg of salt every 5 weeks).” In addition, the water hardness level of the product may be indicated as “2 (replenish 1 kg of salt every 5 weeks).”

[0201] Figure 19 illustrates a screen displayed when the product water hardness level is higher than the water treatment plant water hardness level. Referring to Figure 19, when the product water hardness level is higher than the water treatment plant water hardness level, the message “Try lowering the product water hardness level” may be displayed.

[0202] In addition, the water hardness level of the water purification plant may be indicated as “1 (replenish 1 kg of salt every 10 weeks).” In addition, the water hardness level of the product may be indicated as “2 (replenish 1 kg of salt every 5 weeks).”

[0203] Additionally, an “Apply” option may be displayed. If the customer selects “Apply,” the dishwasher will automatically set the product water hardness level to match the water hardness level of the water purification plant.

[0204] FIG. 20 illustrates a screen displayed when the product water hardness level is lower than the water purification plant water hardness level. Referring to FIG. 20, when the product water hardness level is lower than the water purification plant water hardness level, the message “Try increasing the product water hardness level” may be displayed.

[0205] In addition, the water hardness level of the water purification plant may be indicated as “2 (replenish 1 kg of salt every 5 weeks).” In addition, the water hardness level of the product may be indicated as “1 (replenish 1 kg of salt every 10 weeks).”

[0206] Additionally, the “Go to set water hardness level manually” item may be displayed. If the customer selects “Go to set water hardness level manually,” a screen for directly selecting the product's water hardness level may be displayed.

[0207] Figure 21 illustrates a screen for directly selecting the product water hardness level. For example, direct selection items such as “no salt needed”, “replenish 1kg of salt at weekly intervals”, “replenish 1kg of salt at weekly intervals”, “replenish 1kg of salt at weekly intervals”, and “replenish 1kg of salt at weekly intervals” may be displayed.

[0208] A dishwasher according to one embodiment of the present invention includes a tub having a washing space formed therein; and a water softening device for softening washing water to be supplied to the tub. The dishwasher controls the water softening device based on a hardness level, and if the hardness of the washing water and the hardness level do not match, the hardness level is automatically set to match the hardness of the washing water.

[0209] According to one embodiment, the dishwasher can receive the hardness of the washing water according to the user's residential area from a collection server that collects water quality data.

[0210] According to one embodiment, a dishwasher can receive the hardness of the washing water from a water purifier that includes a hardness sensor for detecting the hardness of the washing water.

[0211] According to one embodiment, the dishwasher may further include a hardness sensor that detects the hardness of the washing water.

[0212] According to one embodiment, the dishwasher can check whether the hardness and hardness level of the washing water match at regular intervals.

[0213] According to one embodiment, if the hardness of the washing water and the hardness level do not match, the dishwasher can explain the current level of the washing water hardness and guide the automatic setting of the hardness level through an application installed on a user terminal.

[0214] According to one embodiment, when automatic setting of the hardness level is selected through an application, the dishwasher can set the hardness level to match the hardness of the wash water at the time of selection.

[0215] According to one embodiment, if automatic setting of the hardness level is not selected through the application, the dishwasher can set the hardness level to match the hardness of the wash water after the end of the wash course.

[0216] According to one embodiment, the dishwasher may further include a detection sensor that detects salt stored in a water softening device.

[0217] According to one embodiment, the dishwasher determines whether to refill salt based on a detection signal from a detection sensor, and if it is determined that salt refilling is necessary, it can provide guidance on salt refilling through an application installed on a user terminal.

[0218] According to one embodiment, when the dishwasher provides instructions for salt refilling, it may recommend a link to a salt sales product through an application.

[0219] According to one embodiment, when a user's location information is input through an application installed on a user terminal, the dishwasher can check the hardness of the washing water based on the user's location information from a collection server that collects water quality data, and recommend a hardness level according to the hardness of the washing water through the application.

[0220] According to one embodiment, when the hardness level is higher than the hardness of the wash water, the dishwasher may display a recommendation interface to set the hardness level lower through an application.

[0221] According to one embodiment, when the hardness level is lower than the hardness of the wash water, the dishwasher may display a recommendation interface to set the hardness level higher through an application.

[0222] According to one embodiment, if the hardness level of the dishwasher matches the hardness of the wash water, the dishwasher can provide guidance through an application that the hardness level is set correctly.

[0223] A control method for a dishwasher according to one embodiment of the present invention may include the step of obtaining the hardness of the washing water; the step of automatically setting the hardness level of a water softening device according to the hardness of the washing water; and the step of determining the regeneration of the ion exchange resin of the water softening device based on the hardness level.

[0224] According to one embodiment, the step of obtaining the hardness of the washing water may include receiving the hardness of the washing water according to the user's residential area from a collection server, receiving the hardness of the washing water from a water purifier, or detecting the hardness of the washing water through a hardness sensor.

[0225] According to one embodiment, the step of automatically setting the hardness level may include: a step of comparing the hardness of the washing water obtained at regular intervals with a preset hardness level; and a step of adjusting the hardness level to correspond to the hardness of the washing water if, as a result of the comparison, the hardness of the washing water does not correspond to the hardness level.

[0226] According to one embodiment, the step of determining the regeneration of the ion exchange resin may include controlling at least one of the amount of salt added and the regeneration frequency based on the hardness level.

[0227] According to one embodiment, the method may further include the step of detecting the concentration of salt water contained inside the regeneration tank through a concentration detection device provided in the regeneration tank.

[0228] According to one embodiment, the method may further include a step of guiding salt charging when the concentration of the salt water is detected to be below a set concentration.

[0229] According to one embodiment, the method may further include a step of predicting the amount of salt consumed based on the hardness level and adjusting the timing of the salt replenishment guidance.

[0230] Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the claims below.

Claims

1. A tub in which a cleaning space is formed inside; and It includes a water softening device for softening the washing water to be supplied to the above tub, and A dishwasher that controls the water softening device based on a hardness level, and automatically sets the hardness level to match the hardness of the washing water when the hardness of the washing water and the hardness level do not match.

2. In Paragraph 1, The above dishwasher A dishwasher that receives the hardness of the washing water according to the user's residential area from a collection server that collects water quality data.

3. In Paragraph 1, The above dishwasher A dishwasher that receives the hardness of the washing water from a water purifier including a hardness sensor that detects the hardness of the washing water.

4. In Paragraph 1, The dishwasher described above further comprises a hardness sensor that detects the hardness of the washing water.

5. In Paragraph 1, The above dishwasher A dishwasher that checks whether the hardness of the washing water and the hardness level match at regular intervals.

6. In Paragraph 5, The above dishwasher A dishwasher that, when the hardness of the washing water and the hardness level do not match, explains the current level of the hardness of the washing water and guides the automatic setting of the hardness level through an application installed on a user terminal.

7. In Paragraph 6, The above dishwasher A dishwasher that, when automatic setting of the hardness level is selected through the above application, sets the hardness level to match the hardness of the washing water at the time of selection.

8. In Paragraph 6, The above dishwasher A dishwasher that, if automatic setting of the hardness level is not selected through the above application, sets the hardness level to match the hardness of the wash water after the end of the wash course.

9. In Paragraph 1, The dishwasher described above further comprises a detection sensor that detects salt stored in the water softening device.

10. In Paragraph 9, The above dishwasher A dishwasher that determines whether to refill salt based on the detection signal of the above-mentioned detection sensor, and guides the refilling of salt through an application installed on a user terminal if it is determined that salt refilling is necessary.

11. In Paragraph 10, The above dishwasher A dishwasher that recommends a salt sales link through the above application when providing salt refill instructions.

12. In Paragraph 1, The above dishwasher A dishwasher that, when user location information is input through an application installed on a user terminal, checks the hardness of the washing water according to the user's location information from a collection server that collects water quality data, and recommends the hardness level according to the hardness of the washing water through the application.

13. In Paragraph 12, The dishwasher above displays a recommendation interface for setting the hardness level lower through the application when the hardness level is higher than the hardness of the wash water.

14. In Paragraph 12, The dishwasher above displays a recommendation interface for setting the hardness level higher through the application when the hardness level is lower than the hardness of the wash water.

15. In Paragraph 12, The above dishwasher is a dishwasher that, when the hardness level matches the hardness of the wash water, provides guidance through the application that the hardness level is set correctly.

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