Dish washer and controlling method thereof

Abstract

This dish washer may comprise: a tub; a sump provided below the tub so as to store washing water; a circulation pump for pumping and circulating the washing water; a turbidity sensor for detecting the turbidity of the washing water; a temperature sensor for detecting the temperature of the washing water; a power sensor for detecting the power consumed by the circulation pump; and a control unit for stopping the operation of the circulation pump on the basis that the power consumed by the circulation pump is less than or equal to reference power, and performing, on the basis of the turbidity of the washing water and / or the temperature of the washing water, a bubble removal cycle for removing bubbles of the washing water and a make-up water supply cycle for additionally supplying water to the tub or the sump.

Description

Dishwasher and its control method

[0001] The disclosed invention relates to a dishwasher and a method of controlling the same.

[0002] Typically, a dishwasher performs a washing cycle that uses water and detergent to wash dishes in a space where dishes can be stored, a rinsing cycle that rinses dishes, a drying cycle that dries dishes, and a cooling cycle that cools the heat of dishes.

[0003] In the washing and rinsing cycles, the dishwasher uses the cleaning power of the detergent to wash away contaminants from the dishes and then rinses the dishes.

[0004] If a user who is not familiar with how to use a dishwasher puts in detergent that is not suitable for dishwashing, such as dishwashing detergent, foam may be generated in the washing water used to wash the dishes, which may cause a malfunction as it flows into the dishwasher pump.

[0005] To address this issue, the pump's operation was used to determine whether foam was generated in the wash water. However, the pump's operation when the dishwasher was low on wash water was similar to when foam was generated, making it difficult to accurately determine whether foam was generated in the wash water.

[0006] The disclosed invention can provide a dishwasher and a control method for the dishwasher that determine the state of the wash water in the dishwasher not only by the operation of the pump but also by the turbidity or temperature of the wash water.

[0007] The disclosed invention can provide a dishwasher and a control method for the dishwasher that can prevent a breakdown of the dishwasher by performing an operation appropriate to the state of the washing water.

[0008] A dishwasher according to the invention may include a tub; a sump provided to store wash water under the tub; a circulation pump for pumping and circulating the wash water; a turbidity sensor for detecting turbidity of the wash water; a temperature sensor for detecting temperature of the wash water; a power sensor for detecting power consumed by the circulation pump; and a control unit for stopping the operation of the circulation pump based on the power consumed by the circulation pump being lower than or equal to a reference power, and performing a foam removal process for removing foam from the wash water or a supplementary water process for additionally supplying water to the tub or the sump based on at least one of the turbidity of the wash water and the temperature of the wash water.

[0009] A control method of a dishwasher according to the invention comprises: a tub; a sump provided to store wash water under the tub; and a circulation pump for pumping and circulating the wash water; the control method of a dishwasher may include: stopping the operation of the circulation pump based on the power consumed by the circulation pump being lower than or equal to a reference power; and performing a foam removal process for removing foam from the wash water or a supplementary water process for additionally supplying water to the tub or the sump based on at least one of turbidity of the wash water and temperature of the wash water.

[0010] According to one aspect of the disclosed invention, there is an effect in which the state of the washing water in the dishwasher can be judged more accurately by using not only the operation of the pump but also the turbidity and temperature of the washing water.

[0011] According to one aspect of the disclosed invention, there is a better effect of preventing a dishwasher from malfunctioning by more accurately determining the state of the washing water and performing an operation appropriate to the state of the washing water.

[0012] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure belongs from the description below.

[0013] FIG. 1 is a schematic perspective view of a dishwasher according to one embodiment.

[0014] FIG. 2 is a schematic side cross-sectional view of a dishwasher according to one embodiment.

[0015] FIG. 3 is a perspective view illustrating a lower portion of a dishwasher according to one embodiment.

[0016] FIG. 4 is a perspective view illustrating a part of a dishwasher according to one embodiment.

[0017] Fig. 5 is an exploded perspective view of the filter assembly among some components of the dishwasher illustrated in Fig. 4.

[0018] FIG. 6 is a perspective view of a sump assembly of a dishwasher according to one embodiment.

[0019] Figure 7 is a perspective view of the sump assembly shown in Figure 6 viewed from the rear.

[0020] FIG. 8 is a bottom view of a sump assembly of a dishwasher according to one embodiment.

[0021] FIG. 9 is an exploded view of a sump assembly of a dishwasher according to one embodiment.

[0022] Fig. 10 is an exploded view of the sump assembly shown in Fig. 9 viewed from the rear.

[0023] Figure 11 is an exploded view of the sump assembly shown in Figure 9, viewed from below.

[0024] Fig. 12 is a control block diagram of a dishwasher according to one embodiment.

[0025] FIG. 13 is a flowchart illustrating the entire process performed by a dishwasher to wash dishes according to one embodiment.

[0026] FIG. 14 is a flowchart for explaining a method of performing a foam removal process or a water supply process of a dishwasher according to one embodiment.

[0027] FIG. 15 is a graph showing changes in turbidity or temperature of wash water in a sump according to operation and stop of a circulation pump, according to one embodiment.

[0028] FIG. 16 is a diagram illustrating an example of providing information on foam generation in washing water through a user interface according to one embodiment.

[0029] It should be understood that the various embodiments and terms used in this document are not intended to limit the technical features described in this document to specific embodiments, but rather to include various modifications, equivalents, or substitutes of the embodiments.

[0030] In connection with the description of the drawings, similar reference numerals may be used for similar or related components.

[0031] The singular form of a noun corresponding to an item may include one or more of said items, unless the relevant context clearly indicates otherwise.

[0032] In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof.

[0033] The term "and / or" includes any combination of a plurality of related described elements or any one of a plurality of related described elements.

[0034] The terms "part," "module," and "member" may be implemented in hardware or software. Depending on the embodiments, multiple "parts," "modules," or "members" may be implemented as a single component, or a single "part," "module," or "member" may include multiple components.

[0035] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one component from another and do not qualify the components in any other respect (e.g., importance or order).

[0036] When a component (e.g., a first component) is referred to as being "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0037] The terms "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in this document, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0038] When a component is said to be “connected,” “coupled,” “supported,” or “in contact with” another component, this includes not only cases where the components are directly connected, coupled, supported, or in contact, but also cases where the components are indirectly connected, coupled, supported, or in contact through a third component.

[0039] When we say that a component is "on" another component, this includes not only cases where the component is in contact with the other component, but also cases where there is another component between the two components.

[0040] Meanwhile, the terms "front", "back", "left", "right", "upper", "lower", etc. used in the following description are defined based on the drawing, but the shape and position of each component are not limited by the above terms. For example, the front side may be defined as the +X side, and the rear side may be defined as the -X side. For example, based on the drawing, the right side may be defined as the +Y side, and the left side may be defined as the -Y side. For example, based on the drawing, the upper side may be defined as the +Z side, and the lower side may be defined as the -Z side.

[0041] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0042] FIG. 1 is a schematic perspective view of a dishwasher according to one embodiment. FIG. 2 is a schematic side cross-sectional view of a dishwasher according to one embodiment.

[0043] Referring to FIGS. 1 and 2, the dishwasher (1) may include a main body (10). The main body (10) may form the exterior of the dishwasher (1).

[0044] A dishwasher (1) may include a tub (12) provided inside a main body (10). The tub (12) may be provided in a roughly box shape. One side of the tub (12) may be open. That is, the tub (12) may have an opening (12a). As an example, the front of the tub (12) may be open.

[0045] The dishwasher (1) may include a door (11) provided to open and close the opening (12a) of the tub (12). The door (11) may be installed on the main body (10) to open and close the opening (12a) of the tub (12). The door (11) may be installed on the main body (10) so as to be rotatable. The door (11) may be detachably mounted on the main body (10).

[0046] The dishwasher (1) may further include a storage container provided inside the tub (12) to store dishes.

[0047] The storage container may include a plurality of baskets (51, 52, 53).

[0048] The storage container may include a middle basket (52) positioned in the middle in the height direction of the dishwasher (1) and a lower basket (51) positioned in the lower part in the height direction of the dishwasher (1). The middle basket (52) may be provided to be supported by a middle guide rack (13b). The lower basket (51) may be provided to be supported by a lower guide rack (13a). The middle guide rack (13b) and the lower guide rack (13a) may be installed on a side surface (12d) of the tub (12) so as to be slidable toward the opening (12a) of the tub (12). The side surface (12d) of the tub (12) may include an inner surface of a right wall and an inner surface of a left wall of the tub (12).

[0049] A plurality of baskets (51, 52) can store relatively large dishes. However, the types of dishes stored in the plurality of baskets (51, 52) are not limited to relatively large dishes. That is, the plurality of baskets (51, 52, 53) can store not only relatively large dishes but also relatively small dishes.

[0050] The storage container may include an upper basket (53) positioned at the top in the height direction of the dishwasher (1). The upper basket (53) is formed in the form of a rack assembly and can store relatively small dishes. For example, cooking tools or cutlery such as ladles, knives, and spatulas can be stored in the upper basket (53). In addition, the rack assembly may also store small cups such as espresso cups. However, the types of dishes stored in the upper basket (53) are not limited to the above examples.

[0051] The upper basket (53) may be provided to be supported by an upper guide rack (13c). The upper guide rack (13c) may be installed on the side (12d) of the tub (12). For example, the upper basket (53) may be slidably moved by the upper guide rack (13c) and may be introduced into or withdrawn from the washing room (C).

[0052] The storage container is not limited to the shape illustrated in FIGS. 1 and 2. For example, depending on the size of the tub (12), the upper basket (53) may not be included. That is, the storage container may be implemented with only the middle basket (52) and the lower basket (51).

[0053] The dishwasher (1) may include a washing room (C), which is a space formed inside the tub (12). The washing room (C) may be defined as an inner space of the tub (12). The washing room (C) may refer to a space in which dishes placed in baskets (51, 52, 53) can be washed and dried using washing water.

[0054] The dishwasher (1) may include a spray device (40) configured to spray washing water. The spray device (40) may receive washing water from a sump (70) to be described later.

[0055] The injection device (40) may include a plurality of injection units (41, 42, 43).

[0056] For example, the plurality of spray units (41, 42, 43) may include a first spray unit (41) disposed at the bottom of the lower basket (51) in the height direction of the dishwasher (1), a second spray unit (42) disposed at the bottom of the middle basket (52) in the height direction of the dishwasher (1), and a third spray unit (43) disposed at the top of the upper basket (53) in the height direction of the dishwasher (1).

[0057] Each of the plurality of spray units (41, 42, 43) may be arranged to spray washing water while rotating. Each of the first spray unit (41), the second spray unit (42), and the third spray unit (43) may be arranged to spray washing water while rotating. The plurality of spray units (41, 42, 43) may be referred to as a plurality of spray rotors. Each of the first spray unit (41), the second spray unit (42), and the third spray unit (43) may be referred to as a first spray rotor (41), a second spray rotor (42), and a third spray rotor (43).

[0058] However, the spray device (40) may spray the washing water in a different manner from the above-described example. For example, the first spray unit (41), unlike the second spray unit (42) and the third spray unit (43), may be fixed to one side of the lower surface (12b) of the tub (12). At this time, the first spray unit (41) is arranged to spray the washing water in a substantially horizontal direction by means of a fixed nozzle, and the washing water sprayed in a horizontal direction from the nozzle of the first spray unit (41) may have its direction changed by a switching assembly (not shown) arranged inside the washing room (C) and may advance upward. The switching assembly may be installed on a rail by means of a holder and may be arranged to be capable of translationally moving along the rail.

[0059] The dishwasher (1) may include an auxiliary spray device (30). The auxiliary spray device (30) is positioned on the lower side of the washing chamber (C) and can spray washing water on a certain area. The auxiliary spray device (30) is designed to spray washing water at a relatively high pressure compared to the spray device (40), thereby enabling intensive washing of heavily soiled dishes. The auxiliary spray device (30) may be omitted.

[0060] The auxiliary injection device (30) can be detachably mounted on the lower part of the washing room (C). The auxiliary injection device (30) can be detachably mounted on a sump (70) to be described later. In the drawing, the auxiliary injection device (30) is illustrated as having a circular shape, but is not limited thereto, and can be provided in a shape similar to a plurality of injection units (41, 42, 43). The auxiliary injection device (30) can be referred to as an auxiliary injection rotor (30).

[0061] Meanwhile, the plurality of injection units (41, 42, 43, 30) below may be a concept including at least two of the first injection unit (41), the second injection unit (42), the third injection unit (43), and the auxiliary injection device (30). Similarly, the plurality of injection rotors (41, 42, 43, 30) may be a concept including at least two of the first injection unit (41), the second injection unit (42), the third injection unit (43), and the auxiliary injection device (30).

[0062] The dishwasher (1) may include a sump (70).

[0063] A sump (70) may be provided to receive washing water. The sump (70) may collect washing water from the washing room (C). For example, the lower surface (12b) of the tub (12) may be provided to slope downward toward the sump (70). Washing water from the washing room (C) may flow along the slope of the lower surface (12b) of the tub (12) and smoothly flow into the sump (70).

[0064] The dishwasher (1) may include a circulation pump (500) that pumps wash water stored in the sump (70) to the spray device (40).

[0065] The dishwasher (1) may include a drain pump (600) that drains wash water and foreign substances (e.g., food waste, etc.) remaining in the sump (70).

[0066] The circulation pump (500) can pump the collected wash water and supply it to the spray device (40). The sump (70) can include a connection port (310) connected to the spray device (40) to supply the wash water to the spray device (40).

[0067] For example, referring to FIG. 2, the connection port (310) may include a first connection port (311) connected to the first injection unit (41), a second connection port (312) connected to the second injection unit (42), and a third connection port (313) connected to the third injection unit (43). The second connection port (312) may be connected to the second injection unit (42) by a first duct. The third connection port (313) may be connected to the third injection unit (43) by a second duct. The first duct and the second duct may be provided as separate ducts, or may be provided as a single duct (14) as illustrated in FIG. 2. The duct (14) may include a shape extending in the height direction.

[0068] For example, the sump (70) can supply washing water to the first spray unit (41) through the first connection port (311). The sump (70) can supply washing water to the second spray unit (42) through the second connection port (312). The sump (70) can supply washing water to the third spray unit (43) through the third connection port (313).

[0069] However, it is not limited to the above-described example. For example, the second connection port (312) and the third connection port (313) may be configured as a single port, and in this case, the washing water provided through the single port may flow into the duct (14). The washing water introduced into the duct (14) may be branched during flow and provided to at least one of the second spray unit (42) and the third spray unit (43).

[0070] The sump (70) can pump the collected washing water and supply it to the auxiliary spray device (30). For example, the connection port (310) can include a fourth connection port (314) connected to the auxiliary spray device (30), and the sump (70) can supply washing water to the auxiliary spray device (30) through the fourth connection port (314). The fourth connection port (314) can be omitted depending on whether the auxiliary spray device (30) is present.

[0071] Meanwhile, the plurality of connection ports (311, 312, 313, 314) may be a concept including at least two of the first connection port (311), the second connection port (312), the third connection port (313), and the fourth connection port (314).

[0072] The dishwasher (1) may include a machine room (L), which is a space provided below the tub (12). The machine room (L) may be a place where a configuration for circulating washing water is placed.

[0073] For example, at least a portion of the sump (70) may be placed in the machine room (L). Most of the sump (70) may be placed in the machine room (L). That is, the area of ​​the sump (70) located in the washing room (C) may be smaller than the area of ​​the sump (70) located in the machine room (L). By reducing the area of ​​the sump (70) occupying the washing room (C), the area of ​​the washing room (C) can be secured. Thereby, the capacity of the washing room (C) can be increased, and the dish storage capacity can be improved.

[0074] Fig. 3 is a perspective view illustrating a lower portion of a dishwasher according to one embodiment. Fig. 4 is a perspective view illustrating a portion of a dishwasher according to one embodiment. Fig. 5 is an exploded perspective view of the filter assembly, one of the portions of the dishwasher illustrated in Fig. 4.

[0075] Referring to FIGS. 3 to 5, the sump (70) may include a sump housing (100) and a sump cover (300) provided to cover at least a portion of the sump housing (100).

[0076] The sump housing (100) can be detachably coupled to the lower surface (12b) of the tub (12). For example, the sump housing (100) can be screw-fastened to the lower surface (12b) of the tub (12). However, the present invention is not limited thereto, and the sump housing (100) can be coupled to the tub (12) in various ways.

[0077] The sump housing (100) may include a storage chamber (111) configured to store wash water. The storage chamber (111) may have an open top shape. The storage chamber (111) may have a downwardly sunken shape.

[0078] For example, the water storage chamber (111) may be provided to receive washing water introduced through a water supply hole (170) from a water supply pipe (21) or to receive washing water introduced from a tub (12).

[0079] The circulation pump (500) can pump the washing water stored in the sump housing (100) and deliver it to the spray device (40). The circulation pump (500) can be coupled to the sump housing (100). The circulation pump (500) can be arranged to be in communication with the water storage chamber (111).

[0080] A drain pump (600) may be provided to drain the washing water and foreign substances stored in the sump housing (100). The drain pump (600) may be coupled to the sump housing (100). The drain pump (600) may be provided to communicate with the water storage chamber (111).

[0081] The dishwasher (1) may include a support frame (80) that can be detachably mounted on the lower surface (12b) of the tub (12). For example, the support frame (80) may be provided to surround the rim of the sump cover (300). The support frame (80) may include a step portion (81) provided to support a filter assembly (60) to be described later.

[0082] The dishwasher (1) may include a filter assembly (60).

[0083] The filter assembly (60) may be provided to filter foreign substances contained in the wash water flowing into the sump (70). The filter assembly (60) may be arranged to correspond to the water storage chamber (111) of the sump (70). The filter assembly (60) may be detachably mounted to the sump (70).

[0084] The filter assembly (60) may include at least one filter. For example, the filter assembly (60) may include a fine filter (61), a coarse filter (62), and a micro filter (63).

[0085] The fine filter (61) can be detachably mounted on the lower surface (12b) of the tub (12). For example, the fine filter (61) can include a horizontal plate shape.

[0086] The fine filter (61) may include a filter opening (61a). For example, a course filter (62) may pass through the filter opening (61a) and be seated inside the water storage chamber (111). For example, a micro filter (63) may pass through the filter opening (61a) and be seated inside the water storage chamber (111).

[0087] The coarse filter (62) may be provided to filter out foreign substances having a relatively larger size than the fine filter (61). For example, the coarse filter (62) may be composed of a first coarse filter (62a) and a second coarse filter (62b). The first coarse filter (62a) and the second coarse filter (62b) may be provided to be mutually separable. The first coarse filter (62a) may be arranged inside the second coarse filter (62b). In the drawing, the coarse filter (62) is illustrated as being composed of two coarse filters (62a, 62b), but is not limited thereto, and the coarse filter (62) may be provided with one or three or more coarse filters.

[0088] The microfilter (63) may be provided to filter out impurities having a relatively smaller size than the fine filter (61). The microfilter (63) may be provided to surround a portion of the outer circumference of the coarse filter (62). The microfilter (63) may have a substantially cylindrical shape. The microfilter (63) may be placed inside the water storage chamber (111). In the drawing, the diameter of the microfilter (63) is illustrated as being larger than the diameter of the filter opening (61a), but is not limited thereto, and the diameter of the microfilter (63) may be smaller than the diameter of the filter opening (61a).

[0089] Washing water filtered through the filter assembly (60) can be pumped by the circulation pump (500) and provided to the spray device (40). As a result, clean washing water with foreign substances removed can be sprayed into the washing room (C) through the spray device (40).

[0090] FIG. 6 is a perspective view of a sump assembly of a dishwasher according to one embodiment. FIG. 7 is a perspective view of the sump assembly illustrated in FIG. 6 from the rear. FIG. 8 is a bottom view of the sump assembly of a dishwasher according to one embodiment. FIG. 9 is an exploded view of the sump assembly of a dishwasher according to one embodiment. FIG. 10 is an exploded view of the sump assembly illustrated in FIG. 9 from the rear. FIG. 11 is an exploded view of the sump assembly illustrated in FIG. 9 from below.

[0091] The sump (70) may include a sump housing (100).

[0092] A sump housing (100) may be provided to accommodate wash water. The sump housing (100) may include a storage chamber (111) in which wash water is stored. The sump housing (100) may include a distribution chamber (121) in which wash water provided to a spray device (40) is accommodated. The storage chamber (111) and the distribution chamber (121) may be partitioned from each other.

[0093] For example, the sump housing (100) may include a first sump body (110) configured to form a storage chamber (111) and a second sump body (120) configured to form a distribution chamber (121). For example, the distribution chamber (121) may be located above the storage chamber (111).

[0094] Meanwhile, in the drawing, the storage chamber (111) and the distribution chamber (121) are shown as being formed integrally, but this is not limited to the present invention, and the storage chamber (111) and the distribution chamber (121) may be provided as separate structures.

[0095] The second sump body (120) may include a chamber hole (122) that is connected to the distribution chamber (121). A portion of the connecting shaft (220) of the distribution device (200) described later may be inserted into the chamber hole (122) and protrude into the distribution chamber (121).

[0096] The sump housing (100) may include a flange (150) that corresponds to the chamber hole (122) and extends downward. The flange (150) may include a cutout (150a). The cutout (150a) may be provided to prevent interference with a connector (700) to be described later. Details regarding the flange (150) will be described later.

[0097] The second sump body (120) may include a washing water inlet (123) through which washing water is introduced into the distribution chamber (121). The washing water inlet (123) may be connected to a connector (700) to be described later.

[0098] The second sump body (120) may include a wash water outlet (124) through which wash water within the distribution chamber (121) flows out. The wash water outlet (124) may be connected to a valve assembly (800) to be described later.

[0099] For example, the sump housing (100) may include a third sump body (130). The third sump body (130) may refer to the exterior of the sump housing (100) excluding the first sump body (110) and the second sump body (120).

[0100] For example, the third sump body (130) may include a base portion (131) connecting the first sump body (110) and the second sump body (120), and a border portion (132) protruding upward from an outer edge of the base portion (131). The base portion (131) may be coupled to the tub (12). The border portion (132) may include an insertion groove (133) into which a first sealing member (91) to be described later is coupled. However, the shape of the third sump body (130) is not limited to the above-described example, and may include various shapes.

[0101] The sump housing (100) may include a circulation pump connection (141) to which a circulation pump (500) is connected. The circulation pump connection (141) may be in communication with a storage chamber (111). Washing water stored in the storage chamber (111) may be introduced into the circulation pump (500) through the circulation pump connection (141).

[0102] The sump housing (100) may include a drain pump connection (142) to which a drain pump (600) is connected. The drain pump connection (142) may be in communication with a water storage chamber (111). Washing water and foreign substances remaining in the water storage chamber (111) may be introduced into the drain pump (600) through the drain pump connection (142).

[0103] The sump housing (100) may include a drain pipe connection (143) to which a drain pipe (22) is connected. The drain pipe connection (143) may be provided to communicate with a drain pump connection (142). For example, washing water and foreign substances contained in the water storage chamber (111) may be introduced into the drain pipe (22) via the drain pump connection (142) and the drain pipe connection (143) by the pumping force of the drain pump (600). The washing water and foreign substances introduced into the drain pipe (22) may be discharged to the outside of the dishwasher (1).

[0104] The sump housing (100) may include a water supply port (144) to which a water supply pipe (21) is connected. The water supply port (144) may be in communication with a water storage chamber (111). For example, the water supply port (144) may be in communication with a water supply hole (170) formed in the water storage chamber (111). During the water supply operation, the washing water may be stored in the water storage chamber (111) via a water supply source (not shown), a water supply pipe (21) connected to the water supply source, the water supply port (144), and the water supply hole (170). In addition, the washing water supplied from the water supply source (not shown) may flow to the water supply pipe (21) via a water softener (not shown).

[0105] The sump housing (100) may include an auxiliary port (145). For example, a turbidity sensor (93) may be detachably mounted on the auxiliary port (145). The turbidity sensor (93) may be provided to detect the contamination level of the wash water contained in the water storage chamber (111). A controller (not shown) of the dishwasher (1) may be provided to control the washing process (or rinsing process) based on information detected by the turbidity sensor (93). The controller (not shown) may control the number of times the washing process (or rinsing process) is performed, the duration of the washing process, etc. based on information detected by the turbidity sensor (93). Meanwhile, the present invention is not limited to the above-described example, and as an example, the controller may notify the user of information detected by the turbidity sensor (93).

[0106] The sump housing (100) may include a holder coupling portion (160). The sump housing (100) may include a holder coupling portion (160) to which a holder (400) to be described later is detachably coupled. For example, the holder coupling portion (160) of the sump housing (100) may be coupled with a sump coupling portion (470) of the holder (400). The holder coupling portion (160) of the sump housing (100) may be fastened to the sump coupling portion (470) by a screw (S). However, the present invention is not limited thereto, and various coupling methods may be applied. In the drawing, three holder coupling portions (160) are illustrated, but the present invention is not limited thereto, and two or fewer or four or more holder coupling portions (160) may be provided.

[0107] The dishwasher (1) may include a distribution device (200).

[0108] The distribution device (200) can supply the washing water contained in the distribution chamber (121) to the spray device (40). The distribution device (200) can provide the washing water to at least one of a plurality of spray units (41, 42, 43, 30). The distribution device (200) can selectively spray the washing water from the plurality of spray units (41, 42, 43, 30). The distribution device (200) can reduce the water usage of the dishwasher (1).

[0109] The distribution device (200) may include a distribution motor (210), a connecting shaft (220), and a distribution disc (230).

[0110] The distribution motor (210) can generate rotational force to rotate the distribution disc (230). The distribution motor (210) can include a motor shaft (211). The motor shaft (211) of the distribution motor (210) can form a rotational axis of the distribution motor (210). The motor shaft (211) can be arranged to face the distribution disc (230).

[0111] The connecting shaft (220) can connect the distribution motor (210) and the distribution disc (230). The connecting shaft (220) can transmit the rotational force generated by the distribution motor (210) to the distribution disc (230). The connecting shaft (220) can rotate together with the distribution motor (210) in conjunction with the rotation of the distribution motor (210).

[0112] For example, the connecting shaft (220) may include a shaft body (221) and a cam body (222).

[0113] The shaft body (221) may have one end coupled to the rotational axis of the distribution motor (210) and the other end coupled to the rotational axis of the distribution disk (230). For example, the shaft body (221) may include a hollow portion (221a) into which the motor shaft (211) of the distribution motor (210) is inserted. The hollow portion (221a) may be formed by opening one end of the shaft body (221). For example, the shaft body (221) may extend in the vertical direction.

[0114] The cam body (222) may be formed on one side of the shaft body (221) adjacent to the distribution motor (210). The cam body (222) may be provided on the radially outer side of the shaft body (221). The cam body (222) may be arranged on the radially outer side of the motor shaft (211) of the distribution motor (210). The cam body (222) may be provided so as to be in contact with a switch (240) to be described later.

[0115] A distribution disc (230) may be placed in the distribution chamber (121). The distribution disc (230) may be arranged to rotate by receiving the rotational force of the distribution motor (210). The distribution disc (230) may be arranged to selectively open and close a plurality of connection ports (311, 312, 313, 314) connected to each of a plurality of spray units (41, 42, 43, 30) while rotating. As a result, the washing water in the distribution chamber (121) may be selectively provided to the plurality of spray units (41, 42, 43, 30).

[0116] For example, the distribution disc (230) may include a disc body (231), a shaft coupling portion (232), and a communication hole (233).

[0117] The disk body (231) can form the appearance of the distribution disk (230). For example, the disk body (231) can have a roughly plate shape.

[0118] The shaft coupling portion (232) can be connected to the connecting shaft (220). The shaft coupling portion (232) can be detachably coupled to the other end of the shaft body (221) of the connecting shaft (220). For example, the shaft coupling portion (232) can form a rotational axis of the distribution disk (230). The shaft coupling portion (232) can be formed at the center of the disk body (231).

[0119] A communication hole (233) may be formed penetrating the disk body (231). Depending on the rotation of the distribution disk (230), the communication hole (233) may be provided to communicate with at least one of a plurality of connection ports (311, 312, 313, 314). Washing water within the distribution chamber (121) may be introduced into a spray unit connected to the connection port through the connection port connected to the communication hole (233).

[0120] The distribution device (200) may include a switch (240) configured to detect the rotational position of the connecting shaft (220). The switch (240) may be mounted on a holder (400). The switch (240) may be rotatably coupled to the holder (400). Details regarding the switch (240) will be described later.

[0121] The sump (70) may include a sump cover (300).

[0122] The sump cover (300) may be provided to cover at least a portion of the sump housing (100). The sump cover (300) may be provided to cover the distribution chamber (121). For example, the sump cover (300) may be supported by a support frame (80). The sump cover (300) may be placed in the washing room (C).

[0123] The sump cover (300) may be provided as a component of the distribution device (200). The sump cover (300) may be referred to as a distribution cover (300).

[0124] For example, the sump cover (300) may be formed integrally with the sump housing (100) to form a distribution chamber (121).

[0125] In the drawing, the sump cover (300) is depicted as having a circular shape, but is not limited thereto, and for example, the sump cover (300) may have a polygonal shape.

[0126] The sump cover (300) may include a connection port (310). For example, the connection ports (310) may be provided in multiple numbers. The connection ports (310) may include a first connection port (311), a second connection port (312), a third connection port (313), and a fourth connection port (314). Although the number of connection ports (310) is illustrated as four in the drawing, this is not limited thereto, and for example, the second connection port (312) and the third connection port (312) may be provided as a single connection port.

[0127] The sump cover (300) may include a fixing member (320). The fixing member (320) may be provided to fix the auxiliary injection device (30). For example, the fixing member (320) may be fastened to the auxiliary injection device (30) by a screw. However, this is not limited thereto, and it is obvious that various joining methods may be applied.

[0128] The dishwasher (1) may include a holder (400).

[0129] The holder (400) may be provided to hold some components of the sump (70). The holder (400) may be provided to mount some components of the sump (70). The holder (400) may allow some components of the sump (70) to be compactly arranged, thereby reducing the size of the sump (70). The holder (400) may be provided at the bottom of the sump housing (100).

[0130] The holder (400) may be arranged to accommodate the distribution motor (210). For example, the distribution motor (210) may be accommodated on the holder (400) by a screw (S). For example, the distribution motor (210), the holder (400), and the sump housing (100) may be arranged to be fastened by a screw (S).

[0131] The holder (400) may include a holder body (410) forming the exterior of the holder (400) and an insertion hole (430) formed through the holder body (410).

[0132] The motor shaft (211) of the distribution motor (210) can be inserted into the insertion hole (430) and protrude toward the connecting shaft (220). The motor shaft (211) of the distribution motor (210) can pass through the insertion hole (430) and be coupled to the connecting shaft (220). The motor shaft (211) of the distribution motor (210) can pass through the insertion hole (430) and be inserted into the hollow portion (221a).

[0133] The holder (400) may include a guide hole (420) provided to guide the washing water leaking from the distribution chamber (121). The guide hole (420) may guide the washing water leaking from the distribution chamber (121) to the outside of the distribution motor (210) to prevent the washing water leaking from the distribution chamber (121) from flowing into the distribution motor (210). The guide hole (420) may drain the washing water leaking from the distribution chamber (121) to the outside of the sump (70). This will be described in detail later.

[0134] The holder (400) may be configured to accommodate a switch (240). For example, the holder (400) may include a switch mounting portion (440). This will be described in detail later.

[0135] The holder (400) may include a connector coupling portion (450) to which a connector (700) is coupled. The connector (700) may be mounted on the connector coupling portion (450) and communicate with the wash water inlet portion (123) of the sump housing (100).

[0136] The holder (400) may include a valve coupling portion (460) to which a valve assembly (800) is coupled. The valve assembly (800) may be mounted on the valve coupling portion (460) and communicate with the wash water outlet portion (124) of the sump housing (100).

[0137] The holder (400) may include a sump coupling portion (470) that is coupled with the sump housing (100). For example, the sump coupling portion (470) may correspond to the holder coupling portion (160) of the sump housing (100). The sump coupling portion (470) may be fastened to the holder coupling portion (160) by a screw (S).

[0138] The dishwasher (1) may include a circulation pump (500). The circulation pump (500) may be provided to pump washing water stored in a water storage chamber (111). The circulation pump (500) may be detachably mounted on a circulation pump connection portion (141) of a sump housing (100). The circulation pump (500) may include an inlet port (510) through which washing water flows in from the water storage chamber (111), and an outlet port (520) through which washing water flowing in through the inlet port (510) flows out. The inlet port (510) may be connected to the circulation pump connection portion (141), and the outlet port (520) may be connected to a connector (700).

[0139] For example, the circulation pump (500) may be arranged horizontally in the machine room (L). The circulation pump (500) may include a circulation motor (not shown) that generates rotational force to pump the washing water stored in the water storage chamber (111). The motor shaft (not shown) of the circulation motor may be arranged approximately vertically in the height direction of the dishwasher (1). The motor shaft of the circulation motor may be arranged horizontally. In the case of this arrangement, the height of the machine room (L) can be lowered to increase the height of the washing room (C). This increases the capacity of the washing room (C), which may be advantageous in securing space in the washing room (C).

[0140] The dishwasher (1) may include a drain pump (600). The drain pump (600) may be provided to drain wash water and foreign substances remaining in the water storage chamber (111). The drain pump (600) may be detachably mounted to the drain pump connection (142) of the sump housing (100). The drain pump (600) may be connected to a drain pipe (22).

[0141] For example, the drain pump (600) may be arranged horizontally in the machine room (L). The drain pump (600) may include a drain motor (not shown) that generates rotational force to pump out wash water and foreign substances contained in the water storage chamber (111). The motor shaft (not shown) of the drain motor may be arranged approximately vertically in the height direction of the dishwasher (1). The motor shaft of the drain motor may be arranged horizontally. In the case of this arrangement, the height of the machine room (L) can be lowered to increase the height of the washing room (C). This increases the capacity of the washing room (C), which may be advantageous in securing space in the washing room (C).

[0142] The sump (70) may include a connector (700). The connector (700) may be configured to transfer the wash water pumped from the circulation pump (500) to the distribution chamber (121). One end (710) of the connector (700) may be connected to the outlet port (520) of the circulation pump (500). The other end (720) of the connector (700) may be connected to the wash water inlet (123) of the distribution chamber (121).

[0143] The connector (700) can be detachably mounted on the holder (400). The connector (700) can be mounted on the connector coupling portion (450) of the holder (400). The other end (720) of the connector (700) can be fitted into the connector coupling portion (450). The connector (700) can be connected to the washing water inlet portion (123) of the sump housing (100) while being coupled to the holder (400).

[0144] The dishwasher (1) may include a valve assembly (800). The valve assembly (800) may be configured to open and close a flow path between a water tank (not shown) and a distribution chamber (121). For example, the dishwasher (1) may recover relatively clean wash water used in a rinsing cycle through a recovery pipe (23) and store it in a water tank (not shown). The wash water stored in the water tank may be supplied to a sump (70) and reused during the next water supply cycle. As a result, the water usage of the dishwasher (1) may be reduced. When the valve assembly (800) opens the flow path between the water tank and the distribution chamber (121), water in the distribution chamber (121) may flow into the water tank through the recovery pipe (23). When the valve assembly (800) closes the flow path between the water tank and the distribution chamber (121), water in the distribution chamber (121) may not flow into the water tank through the recovery pipe (23).

[0145] The valve assembly (800) can be detachably mounted on the holder (400). The valve assembly (800) can be mounted on the valve coupling portion (460) of the holder (400). The valve assembly (800) can be coupled to the valve coupling portion (460) of the holder (400). The valve assembly (800) can be connected to the wash water outlet portion (124) of the sump housing (100) while being coupled to the holder (400).

[0146] The sump (70) may include a sealing member to reduce or prevent leakage of wash water.

[0147] For example, the sealing member may include a first sealing member (91) that is provided to seal between the tub (12) and the sump housing (100). It may be provided to be fitted into an insertion groove (133) formed in a rim portion (132) of the sump housing (100). The first sealing member (91) may include a ring shape.

[0148] For example, the sealing member may include a second sealing member (92) configured to seal between the sump housing (100) and the distribution device (200). The second sealing member (92) may be configured to seal between the flange (150) and the connecting shaft (220). The second sealing member (92) may include a ring shape.

[0149] Fig. 12 is a control block diagram of a dishwasher according to one embodiment.

[0150] Referring to FIG. 12, the dishwasher (1) may include various components. The dishwasher (1) may include a control unit (190). The control unit (190) may be electrically connected to various components of the dishwasher (1) and may control the various components.

[0151] For example, the control unit (190) can control a circulation pump (500), a drainage pump (600), a water supply pump (72), a spray device (40), a sensor unit (90), a user interface (180), a communication unit (250), a heater (501), and / or a power supply unit (260).

[0152] The control unit (190) can be electrically connected to various components of the dishwasher (1). The control unit (190) can control various components of the dishwasher (1).

[0153] The control unit (190) may include at least one memory (192) and at least one processor (191) to perform the operations described above and the operations described below.

[0154] The control unit (190) may include at least one memory (192) that stores data in the form of an algorithm and / or a program for controlling the operation of components within the dishwasher (1). The control unit (190) may include at least one processor (191) that performs the operations described above and the operations described below using the data stored in the at least one memory (192). The memory (192) and the processor (191) may each be implemented as separate chips. The processor (191) may include one or more processor chips or one or more processing cores. The memory (192) may include one or more memory chips or one or more memory blocks. In addition, the memory (192) and the processor (191) may also be implemented as a single chip.

[0155] The control unit (190) processes user input received through the user interface (180) and can control various components of the dishwasher (1) based on the processed user input.

[0156] The control unit (190) can control various components of the dishwasher (1) to perform a cycle including a washing process, a rinsing process, a drying process, a cooling process, etc., according to user input entered through the user interface (180).

[0157] The user interface (180) can interact with the user.

[0158] The user interface (180) can obtain user input. The user interface (180) can display information about the dishwasher (1). For example, the user interface (180) can also provide visual and / or auditory feedback.

[0159] The user interface (180) may include an input interface (182).

[0160] The input interface (182) can receive an operation command from a user. The input interface (182) can provide an electrical output signal corresponding to the user input to the control unit (190). The input interface (182) can include various buttons and / or dials. The input interface (182) can obtain various user inputs, such as a user input for turning the dishwasher (1) on or off, a user input for selecting a washing course, a washing option, etc.

[0161] The user interface (180) may include an output interface (182).

[0162] The output interface (181) can display information regarding the status and / or operation of the dishwasher (1). The output interface (181) can display information input by a user and / or information provided to the user. The output interface (181) can display information related to the operation of the dishwasher (1) in the form of at least one of an image or text. The output interface (181) can receive a signal from the control unit (190) and display information corresponding to the received signal. In addition, the output interface (181) can display a graphical user interface (GUI) that enables control of the dishwasher (1). That is, the output interface (181) can display a user interface element (UI element) such as an icon.

[0163] The output interface (181) may include various types of display panels. For example, the display may include a liquid crystal display panel (LCD panel), a light emitting diode panel (LED panel), an organic light emitting diode panel (OLED panel), or a micro LED panel. Additionally, the display may be implemented as a touch display.

[0164] A dishwasher (1) may provide various washing courses for washing dishes. For example, various washing courses may be provided, such as an automatic course, a standard course, a strong course, a rapid course, and / or a rinse-dry course. The number and / or types of operations included in each washing course may vary. Additionally, each washing course may include various changeable washing options (e.g., washing time, temperature, etc.). A user may select a washing course using a user interface (180) and change various washing options that constitute the washing course. The dishwasher (1) may operate according to the washing course and washing options set by the user input.

[0165] The communication unit (250) can transmit data to an external device or receive data from an external device based on a control signal from the control unit (190). For example, the communication unit (250) can communicate with a server, a user terminal device, and / or other home appliances to transmit and receive various types of data.

[0166] The communication unit (250) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between external devices (e.g., a server, a user terminal device, and / or a home appliance), and the performance of communication through the established communication channel. According to one embodiment, the communication unit (250) may include a wireless communication module (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, a corresponding communication module may communicate with an external electronic device through a first network (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These different types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips).

[0167] The communication unit (250) can establish communication with a user terminal device through a server.

[0168] The communication unit (250) may include a Wi-Fi module and may perform communication with an external server and / or user terminal device based on establishing communication with an access point (AP) in the home.

[0169] The dishwasher (1) may include a sensor unit (90).

[0170] The sensor unit (90) may include a power sensor (91), a temperature sensor (92), and / or a turbidity sensor (93).

[0171] A power sensor (91) is installed in the circulation pump (500) and can detect the power consumed by the circulation pump (500). For example, the power sensor (91) can detect the power consumed by a circulation motor (not shown) installed in the circulation pump (500). The power sensor (91) can transmit data on the power consumed by the circulation pump (500) to the control unit (190).

[0172] The temperature sensor (92) can detect the temperature of the washing water stored in the sump (70). The temperature sensor (92) can be combined with the heater (501) to detect the temperature of the washing water heated by the heater (501). The temperature sensor (92) can transmit temperature data of the washing water stored in the sump (70) to the control unit (190).

[0173] The turbidity sensor (93) can detect the turbidity of the wash water stored in the sump (70). Turbidity is a quantitative indicator of the degree of cloudiness of water and represents the resistance to the passage of light. The turbidity sensor (93) can be placed in the sump (70). Various types of sensors can be used as the turbidity sensor (93). For example, the turbidity sensor (93) can emit pulsed light and detect light scattered from particles contained in the wash water. The turbidity sensor (93) can determine the turbidity of the wash water based on the intensity and / or amount of the scattered light detected.

[0174] The power supply unit (260) is connected to an external power source and can obtain power required for the operation of the dishwasher (1). The power supply unit (260) can provide power to electronic components included in the dishwasher (1). The power supply unit (260) can include a power circuit and be electrically connected to the control unit (190). The control unit (190) can control the power supply unit (260) and distribute power required for components of the dishwasher (1).

[0175] The circulation pump (500) can pump and circulate the washing water stored in the sump (70).

[0176] For example, the circulation pump (500) can send the washing water stored in the sump (70) to the spraying device (40) or the distribution device (200). The control unit (190) can control the circulation motor (not shown) to move the washing water stored in the sump (70) to the distribution device (200) or the spraying device (40) by controlling the circulation pump (500). The spraying device (40) can spray the washing water supplied from the circulation pump (500) or the distribution device (200) into the tub (12). The washing water sprayed into the tub (12) is filtered while passing through the filter assembly (60), and the filtered washing water can move back into the sump (70) and be stored in the sump (70).

[0177] The drain pump (600) can drain the washing water stored in the sump (70) to the outside. The control unit (190) controls the drain pump (600) so that the washing water stored in the sump (70) can be drained to the outside of the dishwasher (1) through the drain pipe (22).

[0178] The water supply pump (72) can supply washing water to the sump (70). For example, the water supply pump (72) can move washing water supplied from a water source into the sump (70).

[0179] However, the water supply pump (72) according to the present disclosure can supply washing water into the dishwasher at various locations in the dishwasher. For example, the water supply pump (72) can be connected to the tub (12) and supply washing water to the tub (12).

[0180] The control unit (190) can transmit a control signal to the water supply pump (72) so that the washing water supplied from the water source moves into the sump (70).

[0181] The heater (501) may be provided to heat the washing water stored in the sump (70). For example, the heater (501) may be provided to heat the washing water contained in the water storage chamber (711). For example, the heater (501) may be provided in the circulation pump (500). For example, while the circulation pump (500) is operating, the heater (501) may heat the washing water pumped by the circulation pump (500). For example, the washing water contained in the water storage chamber (711) may be heated by the heater (501) while being pumped by the circulation pump (500).

[0182] FIG. 13 is a flowchart illustrating the entire process performed by a dishwasher to wash dishes according to one embodiment.

[0183] Referring to FIG. 13, the control unit (190) of the dishwasher (1) can identify the selection of a washing course and washing options (S10). The user can select the washing course and washing options using the user interface (180) or an external device. Typically, the washing course may include a washing cycle, a rinsing cycle, a drying cycle, and a cooling cycle. The washing options may include detailed settings for each of the washing cycle, the rinsing cycle, the drying cycle, and the cooling cycle. The control unit (190) can control the operation of the dishwasher (1) according to the selected washing course and washing options. The washing cycle, the rinsing cycle, the drying cycle, and the cooling cycle may be performed sequentially.

[0184] The dishwasher (1) may first perform a washing process (S11). The washing process may include a water supply operation step, a spray operation step, and a drain operation step. In the water supply operation step of the washing process, a predetermined amount of washing water may be stored in the sump (70) and the tub (12). The water supply operation step may include a step in which a water supply pump (72) supplies washing water from a water supply source and supplies water to the sump (70) and the tub (12).

[0185] After a predetermined amount of washing water is stored in the sump (70) and tub (12), the washing water stored in the sump (70) and tub (12) can be heated by the heater (501).

[0186] In the spray operation step of the washing process, the operation of the circulation pump (500) may be performed. For example, the spray operation step may include a step in which the circulation pump (500) operates to pump and send the washing water stored in the sump (70) to the distribution device (200) or the spray device (40), and a step in which the washing water is sprayed into the tub (12) through the spray unit (41, 42, 43) for a predetermined spray time.

[0187] In the drain operation step of the washing process, the washing water used for washing the dishes may be discharged outside the dishwasher (1). For example, the drain operation step may include a step in which the washing water used for washing the dishes is discharged outside the dishwasher (1) through a drain pump (600).

[0188] The washing cycle may include a pre-wash cycle and a main washing cycle. Each of the pre-wash cycle and the main washing cycle may include a water supply phase, a spray phase, and a drain phase.

[0189] After the washing cycle is completed, the dishwasher (1) can perform a rinsing cycle (S12). The rinsing cycle may also include a water supply operation step, a spray operation step, and a drain operation step. The rinsing cycle may be performed multiple times.

[0190] After the rinsing cycle is completed, the dishwasher (1) can perform a drying cycle (S13). In the drying cycle, hot air can be supplied into the tub (12). The hot air can circulate inside the tub (12) and evaporate moisture remaining on the dishes.

[0191] After the drying cycle is completed, the dishwasher (1) may perform a cooling cycle (1605). During the cooling cycle, air having a relatively low temperature may be supplied into the tub (12). During the cooling cycle, the temperature of the dishes may be reduced.

[0192] Fig. 14 is a flowchart illustrating a method for performing a foam removal process or a replenishment process of a dishwasher according to one embodiment. Fig. 15 is a graph showing changes in turbidity or temperature of wash water in a sump according to the operation and stop of a circulation pump according to one embodiment.

[0193] Referring to Fig. 14, the washing process and rinsing process of the dishwasher (1) may each include a water supply operation (S20), a heater operation (S21), and a circulation pump operation (S22).

[0194] When the washing cycle or rinsing cycle of the dishwasher (1) starts, a water supply operation (S1) can be performed. In the water supply operation (S20), washing water can be supplied to the sump (70) and the tub (12). The washing water supplied to the sump (70) and the tub (12) in the water supply operation (S20) may be a mixture of water and detergent. For example, the washing water may be a mixture of water supplied from a water source to the sump (70) or the tub (12) by the water supply pump (72) through the water supply operation (S20) and detergent injected by the user into the tub (12). Therefore, the washing water stored in the sump (70) or the tub (12) through the water supply operation (20) may be a mixture of water and detergent.

[0195] When the water supply operation (S20) is completed, the dishwasher (1) can perform a heater operation (S21). For example, the dishwasher (1) can heat the washing water stored in the sump (70) by operating the heater (501) through the water supply operation (S20).

[0196] The dishwasher (1) can operate the circulation pump (500) (S22). For example, the control unit (190) can drive a circulation motor (not shown) provided in the circulation pump (500) to move the washing water stored in the sump (70) to the distribution device (200) or the spray device (40). The operation of the circulation pump (S22) can be performed simultaneously with the operation of the heater (S21).

[0197] When the circulation pump (500) operates, the washing water can circulate within the dishwasher (1). For example, when the circulation pump (500) operates, the washing water stored in the sump (70) can be sent to the distribution device (200) or the spray device (40) and sprayed into the tub (12) through the spray device (40). In addition, the washing water sprayed into the tub (12) can be filtered again through the filter assembly (60) and moved back to the sump (70).

[0198] In one embodiment, the control unit (190) may stop the operation of the circulation pump (500) based on the power consumed by the circulation pump (500) being below a reference power. Stopping the operation of the circulation pump (500) may include stopping the operation of a circulation motor (not shown).

[0199] A low power consumption value of the circulation pump (500) may mean that the circulation pump (500) is operating abnormally depending on the condition of the washing water.

[0200] The condition of the wash water may include a state in which the wash water is foamy or a state in which the wash water is insufficient.

[0201] For example, foam may be generated in the wash water as it circulates within the dishwasher (1). For the dishwasher (1) to function properly, a detergent containing a foam-reducing agent must be used. When using detergents such as kitchen detergent, excessive foam may be generated as the wash water circulates due to the operation of the circulation pump.

[0202] For another example, the washing water may be insufficient during the process of circulating within the dishwasher (1) or during the water supply operation (S20). If the amount of washing water circulating within the dishwasher (1) is greater than a predetermined amount, normal dishwashing can be performed. However, if a large amount of foreign substances or contaminants are generated during the process of circulating the washing water within the dishwasher (1), the washing water may not be able to move from the tub (12) to the sump (70) through the filter assembly (60). In addition, if the amount of washing water supplied to the sump (70) or the tub (12) through the water supply pump (72) is less than the amount required for normal dishwashing, a state of insufficient washing water may occur.

[0203] If the state of the washing water is such that foam is generated in the washing water, the circulation pump (500) may not operate normally due to the foam, which may lower the operating RPM, and as a result, the power detected by the power sensor (91) may be detected as lower than the reference power.

[0204] When the washing water condition is such that the washing water is insufficient, the washing water stored in the sump (70) is insufficient, so that the circulation pump (500) does not operate normally and the operating RPM may decrease, and as a result, the power detected by the power sensor (91) may be detected as being below the reference power.

[0205] Therefore, it is difficult to clearly distinguish the state of the washing water based solely on the power consumed by the circulation pump (500) during its operation. Therefore, according to the following exemplary embodiment, a method for determining the state of the washing water based on the turbidity or temperature of the washing water is described.

[0206] In various embodiments, the control unit (190) can determine the condition of the wash water based on the turbidity of the wash water.

[0207] In one embodiment, the control unit (190) can determine the state of the wash water based on the turbidity of the wash water detected by the turbidity sensor (93) during the operation of the circulation pump (500).

[0208] For example, referring to FIGS. 14 and 15, the control unit (190) can determine that the state of the washing water is a state in which bubbles are generated in the washing water (S28) based on the change in turbidity (△N1) of the washing water detected by the turbidity sensor (93) during the operation of the circulation pump (500) being greater than or equal to the first reference value (example of S25).

[0209] The amount of change (△N1) in the turbidity of the wash water detected during the operation of the circulation pump (500) may include the amount of increase in the turbidity of the wash water detected during a first predetermined time period during the operation of the circulation pump (500). If a large amount of foam is generated in the wash water during the process of circulating the wash water according to the operation of the circulation pump, the turbidity of the wash water detected through the turbidity sensor (93) during the operation of the circulation pump may increase. Therefore, the state of the wash water can be determined according to the amount of increase in the turbidity of the wash water detected during the operation of the circulation pump (500).

[0210] The first reference value may include a value corresponding to an increase in turbidity due to excessive foaming of the wash water. Even when the wash water is insufficient, the turbidity detected by the turbidity sensor (93) may increase as the wash water circulates inside the dishwasher (1) according to the operation of the circulation pump (500). For example, when foreign substances or contaminants in the wash water increase as the wash water circulates through the dishwasher (1), the turbidity detected by the turbidity sensor (93) may increase. However, since the increase in turbidity due to foaming of the wash water is greater than the increase in turbidity due to the increase in foreign substances or contaminants in the wash water, the first reference value may include a value (e.g., 1800 NTU) greater than the increase in turbidity due to the increase in foreign substances or contaminants in the wash water.

[0211] The amount of change (△N1) in the turbidity of the wash water detected during the operation of the circulation pump (500) may include the amount of change in the turbidity of the wash water detected from the time when detergent is injected through the detergent injection port (not shown) when the dishwasher (1) includes a detergent injection port (not shown). In one embodiment, the control unit (190) may determine the state of the wash water based on the turbidity of the wash water detected by the turbidity sensor (93) after the operation of the circulation pump (500) is stopped.

[0212] For example, referring to FIGS. 14 and 15, the control unit (190) can determine that the state of the washing water is a state in which bubbles are generated in the washing water (S28) based on the change in turbidity (△N2) of the washing water detected by the turbidity sensor (93) after the operation of the circulation pump (500) is stopped being greater than or equal to the second reference value (example of S26).

[0213] The change in turbidity of the wash water detected after the operation of the circulation pump (500) has stopped (△N2) may include the decrease in turbidity of the wash water detected during a second predetermined time period after the operation of the circulation pump (500) has stopped (e.g., 1000 NTU). When the operation of the circulation pump (500) has stopped, the turbidity may decrease instantaneously due to the separation of bubbles.

[0214] For example, in the washing water in which foam has been generated, the turbidity detected by the turbidity sensor (93) may decrease momentarily as the foam separates from the water when the operation of the circulation pump (500) stops.

[0215] In one embodiment, the control unit (190) may determine that the state of the washing water is a state in which bubbles are generated in the washing water based on the fact that the amount of change (△N1) in the turbidity of the washing water detected by the turbidity sensor (93) during the operation of the circulation pump (500) is greater than or equal to a first reference value (example of S25), and the amount of change (△N2) in the turbidity of the washing water detected by the turbidity sensor (93) after the operation of the circulation pump (500) is stopped is greater than or equal to a second reference value (example of S26) (S28).

[0216] In one embodiment, the control unit (190) may determine that the state of the washing water is a state of insufficient washing water based on whether the amount of change in turbidity (△N1) of the washing water detected during the operation of the circulation pump (500) is less than the first reference value (No in S25) or whether the amount of change in turbidity (△N2) of the washing water detected after the operation of the circulation pump (500) is less than the second reference value (No in S26) (S30).

[0217] The state of insufficient washing water or the state of foam generation in washing water can be determined by considering both the turbidity detected during the operation of the circulation pump (500) and the turbidity detected after the operation of the circulation pump (500) is stopped. The control unit (190) can determine the state of washing water based on the temperature of the washing water.

[0218] In various embodiments, the control unit (190) can determine the state of the wash water based on the temperature of the wash water detected by the temperature sensor (92) during the operation of the circulation pump (500).

[0219] In one embodiment, referring to FIGS. 14 and 15, the control unit (190) may determine that the state of the washing water is a state in which foam is generated in the washing water (S28) based on the change in temperature (△T) of the washing water detected through the temperature sensor (92) during the operation of the circulation pump (500) being greater than or equal to the third reference value (example of S27).

[0220] In one embodiment, the control unit (190) may determine that the state of the washing water is insufficient (S30) based on the fact that the temperature change amount (△T) of the washing water detected through the temperature sensor (92) during the operation of the circulation pump (500) is less than the third reference value (NO in S27).

[0221] If the amount of foam generated in the wash water is large due to the operation of the circulation pump (500), the temperature of the wash water may increase. For example, if foam is generated in the wash water due to the operation of the circulation pump (500), the wash water may not circulate normally within the dishwasher (1), and if the heater operation (S21) is performed simultaneously at this time, the heat circulation due to the heater operation (S21) may not occur, and thus the temperature detected by the temperature sensor (92) coupled with the heater (501) may be detected as high.

[0222] The third reference value may include a value corresponding to the temperature increase due to excessive foaming of the washing water (e.g., 2 degrees Celsius). Even when the washing water is insufficient, the washing water may not circulate properly, and thus heat circulation may not occur according to the heater operation (S21). However, when the washing water foams, the gas within the foam may interfere with the heat circulation, and the temperature increase of the washing water may be greater than when the washing water is insufficient.

[0223] In various embodiments, the control unit (190) may perform a foam removal operation to remove foam from the wash water or a supply water operation to supply additional water to the tub (12) or sump (70) based on at least one of the turbidity of the wash water and the temperature of the wash water.

[0224] In one embodiment, if the control unit (190) determines that the state of the washing water is a state in which foam is generated in the washing water (S28), it can perform a foam removal process to remove foam from the washing water (S29).

[0225] In addition, the control unit (190) can omit the step of determining that the washing water according to the present disclosure has foam generated (S28) and perform the foam removal step (S29).

[0226] The foam removal process may include draining the wash water to the outside through the drain pump (600) when the control unit (190) determines that the state of the wash water is a state in which foam has been generated.

[0227] If excessive foam is generated in the washing water, the washing water inside the dishwasher (1) must be removed, so an operation to drain the washing water inside the dishwasher (1) to the outside can be performed.

[0228] In one embodiment, when the control unit (190) determines that the state of the washing water is insufficient (S30), it can perform a supply water operation to additionally supply water to the tub (12) or sump (70) through the water supply pump (72).

[0229] In addition, the control unit (190) can omit determining that the washing water is insufficient according to the present disclosure (S30) and perform the supply water administration (S30).

[0230] By additionally supplying water to the tub (12) or sump (70) through the water supply pump (72), the amount of wash water for normal dishwashing can be maintained. If the state of the wash water is determined to be insufficient, the control unit (190) may perform a filter cleaning process. For example, if the control unit (190) determines that the state of the wash water is insufficient, the control unit (190) may provide an indicator through the user interface (180) to notify that the filter is clogged, so that the user can clean the filter.

[0231] The change in turbidity of the washing water and the change in temperature of the washing water of the present disclosure described above may also mean the rate of change in turbidity of the washing water and the rate of change in temperature of the washing water.

[0232] Although the present disclosure has been described in terms of the change in turbidity of the washing water and the change in temperature of the washing water, the control unit (190) may perform a foam removal process or a supply water process based on the turbidity of the washing water and the temperature of the washing water according to various embodiments.

[0233] For example, the control unit (190) can perform a bubble removal process based on the fact that the turbidity value of the washing water detected during the operation of the circulation pump (500) is greater than or equal to the first reference value and the turbidity value of the washing water detected after the operation of the circulation pump (500) is stopped is less than or equal to the second reference value.

[0234] For another example, the control unit (190) may perform a supply water treatment based on whether the turbidity value of the wash water detected during the operation of the circulation pump (500) exceeds a first reference value or whether the turbidity value of the wash water detected after the operation of the circulation pump (500) is stopped is less than a second reference value.

[0235] For another example, the control unit (190) can perform a foam removal process based on the temperature value of the washing water detected during the operation of the circulation pump (500) being higher than the third reference value, and can perform a supply water process based on the temperature value of the washing water detected during the operation of the circulation pump (500) being lower than the third reference value.

[0236] In addition, the control unit (190) can perform a bubble removal process based on the difference between the highest turbidity value among the turbidity values ​​of the washing water detected during the operation of the circulation pump (500) and the lowest turbidity value among the turbidity values ​​of the washing water detected after the operation of the circulation pump (500) is stopped being equal to or greater than the fourth reference value.

[0237] FIG. 16 is a diagram illustrating an example of providing information on foam generation in washing water through a user interface according to one embodiment.

[0238] Referring to FIG. 16, in one embodiment, the control unit (190) can provide information on whether foam is generated in the washing water through the user interface (180).

[0239] For example, if the control unit (190) determines that the state of the washing water is such that foam is generated in the washing water, it can provide information on whether foam is generated in the washing water through the user interface (180).

[0240] The user interface (180) may include a power interface (180a) for generating a power on / off execution command, a washing course interface (180b) for generating a washing course selection command, a washing option interface (180c) for generating a washing option selection command, and / or a foam generation error code interface (180d) for providing information on foam generation in the washing water. The foam generation error code interface (180d) may provide information on foam generation to the user through an indicator that provides visual information that foam has been generated, or through audio information.

[0241] The control unit (190) can perform the washing process or rinsing process again based on the selection of the power interface (180a) after providing the foam generation error code interface (180d).

[0242] According to one embodiment of the present disclosure, a dishwasher may include: a tub; a sump provided to store wash water under the tub; a circulation pump for pumping and circulating the wash water; a turbidity sensor for detecting turbidity of the wash water; a temperature sensor for detecting a temperature of the wash water; a power sensor for detecting power consumed by the circulation pump; and a control unit for stopping the operation of the circulation pump based on the power consumed by the circulation pump being lower than or equal to a reference power, and performing a foam removal process for removing foam from the wash water or a make-up water process for additionally supplying water to the tub or the sump based on at least one of the turbidity of the wash water and the temperature of the wash water.

[0243] The control unit can perform the foam removal process based on the fact that the amount of change in the turbidity of the washing water detected during the operation of the circulation pump is greater than or equal to a first reference value, and the amount of change in the turbidity of the washing water detected after the operation of the circulation pump is stopped is greater than or equal to a second reference value.

[0244] The amount of change in the turbidity of the washing water detected during the operation of the circulation pump may include the amount of increase in the turbidity of the washing water detected during a first predetermined time period during the operation of the circulation pump, and the amount of change in the turbidity of the washing water detected after the operation of the circulation pump is stopped may include the amount of decrease in the turbidity of the washing water detected during a second predetermined time period after the operation of the circulation pump is stopped.

[0245] The control unit may perform the supply water treatment based on whether the amount of change in turbidity of the washing water detected during the operation of the circulation pump is less than a first reference value or whether the amount of change in turbidity of the washing water detected after the operation of the circulation pump is stopped is less than a second reference value.

[0246] The above control unit can perform the foam removal process based on the change in temperature of the washing water detected during the operation of the circulation pump being greater than or equal to a third reference value.

[0247] The above control unit can perform the supply water treatment based on the amount of change in the temperature of the washing water detected during the operation of the circulation pump being less than a third reference value.

[0248] The dishwasher may further include a user interface for displaying information about the dishwasher, and the foam removal process may include providing information on whether foam is generated in the washing water through the user interface.

[0249] The method further includes a drain pump for draining the washing water to the outside, and the foam removal process may include draining the washing water to the outside through the drain pump.

[0250] The above-described water supply pump may further include a water supply pump for supplying the washing water, and the supply water operation may include the control unit additionally supplying water to the tub or the sump through the water supply pump.

[0251] A control method of a dishwasher according to one embodiment of the present disclosure includes a tub; a sump provided to store wash water under the tub; and a circulation pump for pumping and circulating the wash water, the control method comprising: stopping the operation of the circulation pump based on the power consumed by the circulation pump being lower than or equal to a reference power; and performing a foam removal process for removing foam from the wash water or a make-up water process for additionally supplying water to the tub or the sump based on at least one of turbidity of the wash water and a temperature of the wash water.

[0252] Performing the foam removal process or the supply water process may include performing the foam removal process based on the amount of change in turbidity of the wash water detected during the operation of the circulation pump being greater than or equal to a first reference value and the amount of change in turbidity of the wash water detected after the operation of the circulation pump is stopped being greater than or equal to a second reference value.

[0253] The amount of change in the turbidity of the washing water detected during the operation of the circulation pump may include the amount of increase in the turbidity of the washing water detected during a first predetermined time period during the operation of the circulation pump, and the amount of change in the turbidity of the washing water detected after the operation of the circulation pump is stopped may include the amount of decrease in the turbidity of the washing water detected during a second predetermined time period after the operation of the circulation pump is stopped.

[0254] Performing the foam removal process or the supply water process may include performing the supply water process based on whether the amount of change in turbidity of the washing water detected during the operation of the circulation pump is less than the first reference value or whether the amount of change in turbidity of the washing water detected after the operation of the circulation pump is stopped is less than the second reference value.

[0255] Performing the foam removal process or the supply water process may include performing the foam removal process based on the amount of change in the temperature of the washing water detected during the operation of the circulation pump being greater than or equal to a third reference value.

[0256] Performing the foam removal process or the supply water process may include performing the supply water process based on the amount of change in the temperature of the washing water detected during the operation of the circulation pump being less than a third reference value.

[0257] Further comprising a user interface for displaying information about the dishwasher;

[0258] Performing the above foam removal process may include providing information on whether foam is generated in the washing water through the user interface.

[0259] The method may further include a drain pump for draining the washing water to the outside, and performing the foam removal process may include draining the washing water to the outside through the drain pump.

[0260] The above-described water supply pump may further include; and performing the above-described water supply operation may include; additionally supplying water to the tub or the sump through the above-described water supply pump.

[0261] Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium storing computer-executable instructions. The instructions may be stored in the form of program code, and when executed by a processor, may generate program modules to perform the operations of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

[0262] Computer-readable storage media include all types of storage media that store instructions that can be deciphered by a computer. Examples include read-only memory (ROM), random access memory (RAM), magnetic tape, magnetic disks, flash memory, and optical data storage devices.

[0263] Additionally, a computer-readable recording medium may be provided in the form of a non-transitory storage medium. Here, the term "non-transitory storage medium" simply means a tangible device that does not contain signals (e.g., electromagnetic waves). This term does not distinguish between cases where data is permanently stored in the storage medium and cases where data is temporarily stored. For example, a "non-transitory storage medium" may include a buffer in which data is temporarily stored.

[0264] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable recording medium (e.g., compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product (e.g., a downloadable app) may be temporarily stored or temporarily generated on a machine-readable recording medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0265] The disclosed embodiments have been described with reference to the attached drawings as described above. Those skilled in the art will understand that the present invention can be implemented in forms other than the disclosed embodiments without altering the technical spirit or essential features of the present invention. The disclosed embodiments are illustrative and should not be construed as limiting.

Claims

1. Tub; A sump provided to store wash water under the above tub; A circulation pump that pumps and circulates the washing water; A turbidity sensor for detecting the turbidity of the washing water; A temperature sensor for detecting the temperature of the washing water; A power sensor that detects the power consumed by the above circulation pump; and A dishwasher comprising a control unit that stops the operation of the circulation pump based on the power consumed by the circulation pump being less than or equal to a reference power, and performs a foam removal process for removing foam from the wash water or a supply water process for additionally supplying water to the tub or the sump based on at least one of the turbidity of the wash water and the temperature of the wash water.

2. In paragraph 1, The above control unit, A dishwasher that performs the foam removal process based on the amount of change in the turbidity of the washing water detected during the operation of the circulation pump being greater than or equal to a first reference value and the amount of change in the turbidity of the washing water detected after the operation of the circulation pump is stopped being greater than or equal to a second reference value.

3. In paragraph 2, The amount of change in the turbidity of the washing water detected during the operation of the circulation pump includes the amount of increase in the turbidity of the washing water detected during a first predetermined time during the operation of the circulation pump, A dishwasher in which the amount of change in the turbidity of the wash water detected after the operation of the circulation pump has stopped includes the amount of decrease in the turbidity of the wash water detected during a second predetermined time after the operation of the circulation pump has stopped.

4. In paragraph 1, The above control unit, A dishwasher that performs the replenishment water cycle based on whether the amount of change in the turbidity of the wash water detected during the operation of the circulation pump is less than a first reference value or whether the amount of change in the turbidity of the wash water detected after the operation of the circulation pump is stopped is less than a second reference value.

5. In paragraph 1, The above control unit, A dishwasher that performs the foam removal process based on the change in temperature of the washing water detected during the operation of the circulation pump being greater than or equal to a third reference value.

6. In paragraph 1, The above control unit, A dishwasher that performs the supply water cycle based on the change in temperature of the washing water detected during the operation of the circulation pump being less than a third reference value.

7. In paragraph 1, Further comprising a user interface for displaying information about the dishwasher; The above foam removal process is, A dishwasher comprising providing information on whether foam is generated in the washing water through the user interface.

8. In paragraph 1, Further comprising a drain pump for draining the washing water to the outside; The above foam removal process is, A dishwasher comprising a device for draining the wash water to the outside through the drain pump.

9. In paragraph 1, Further comprising a water supply pump for supplying the washing water; The above supply administration is, A dishwasher comprising additional water supply to the tub or the sump through the water supply pump.

10. A control method for a dishwasher including a tub; a sump provided to store washing water under the tub; and a circulation pump for pumping and circulating the washing water; Stopping the operation of the circulation pump based on the power consumed by the circulation pump being less than or equal to a reference power; A control method for a dishwasher, comprising: performing a foam removal process for removing foam from the wash water or a supplementary water process for supplying additional water to the tub or the sump based on at least one of the turbidity of the wash water and the temperature of the wash water.

11. In paragraph 10, A control method for a dishwasher, comprising: performing the foam removal process or the supply water process, wherein the foam removal process is performed based on the amount of change in the turbidity of the wash water detected during the operation of the circulation pump being greater than or equal to a first reference value, and the amount of change in the turbidity of the wash water detected after the operation of the circulation pump is stopped being greater than or equal to a second reference value.

12. In paragraph 11, The amount of change in the turbidity of the washing water detected during the operation of the circulation pump includes the amount of increase in the turbidity of the washing water detected during a first predetermined time during the operation of the circulation pump, A control method for a dishwasher, wherein the amount of change in the turbidity of the wash water detected after the operation of the circulation pump is stopped includes the amount of decrease in the turbidity of the wash water detected during a second predetermined time after the operation of the circulation pump is stopped.

13. In paragraph 10, Performing the above foam removal process or the above supply water process, A control method for a dishwasher, comprising: performing the make-up water cycle based on whether the amount of change in the turbidity of the wash water detected during the operation of the circulation pump is less than a first reference value, or whether the amount of change in the turbidity of the wash water detected after the operation of the circulation pump is stopped is less than a second reference value.

14. In paragraph 10, Performing the above foam removal process or the above supply water process, A control method for a dishwasher, comprising: performing the foam removal process based on the change in temperature of the washing water detected during the operation of the circulation pump being greater than or equal to a third reference value.

15. In paragraph 10, Performing the above foam removal process or the above supply water process, A control method for a dishwasher, comprising: performing the supply water cycle based on the change in temperature of the washing water detected during the operation of the circulation pump being less than a third reference value.

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