Dishwasher

Abstract

A dishwasher according to one embodiment of the present disclosure comprises: a tub; a basket disposed inside the tub and configured to receive dishes; a spray device including a spray rotor rotatable by spraying washing water to wash the dishes; and a duct including a duct body through which the washing water flows, a duct bearing configured to rotatably support the spray rotor and supply the washing water from the duct body to the spray rotor, and a duct holder configured to rotatably support the spray rotor together with the duct bearing, wherein the spray rotor includes: a nozzle body rotatably coupled to the duct bearing and configured to receive the washing water from the duct bearing; and a base body supported by the duct holder and coupled to the nozzle body so as to receive the washing water introduced into the nozzle body.

Description

dishwasher

[0001] The present disclosure relates to a dishwasher including a spray device.

[0002] A dishwasher is a device that automatically washes food and other items from dishes using detergent and water.

[0003] A dishwasher may include a main body, a tub disposed inside the main body, a basket disposed inside the tub to store dishes, a spray unit configured to spray washing water onto the basket, and a duct for guiding the washing water to the spray unit.

[0004] The spray unit may include a bearing and a spray arm that rotates around the bearing. The spray arm may be provided with a propulsion nozzle that generates propulsion force while spraying cleaning water. The propulsion nozzle must be located at a sufficient distance from the bearing to generate a moment. In other words, the spray arm may be formed to have a sufficient length.

[0005] Dishwashers can effectively wash small dishes by miniaturizing the spray unit. Friction with the bearings can be reduced to generate enough torque to rotate the miniaturized spray unit.

[0006] One aspect of the present disclosure may provide a dishwasher with improved washing performance.

[0007] One aspect of the present disclosure may provide a dishwasher including a miniaturized spray unit.

[0008] One aspect of the present disclosure may provide a dishwasher capable of reducing friction of a bearing.

[0009] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0010] In one embodiment, a dishwasher may include a tub, a basket located within the tub and configured to receive dishes, a spray device, and a duct. The spray device may include a spray rotor, and the spray rotor may include a nozzle body and a base body coupled to the nozzle body such that the base body and the nozzle body together form a space. The duct may include a duct body through which washing water flows. The duct may further include a duct bearing to which the nozzle body is rotatably coupled, and configured to supply washing water flowing within the duct body from the duct body to the space formed by the base body and the nozzle body. The duct may further include a duct holder that supports the base body so as to rotatably support the spray rotor together with the duct bearing, and configured to spray washing water supplied to the space formed by the base body and the nozzle body toward the basket by the spray rotor to wash dishes accommodated in the basket.

[0011] The above duct holder may include a support bearing having a section facing the duct bearing and having a cross-sectional area that decreases as it approaches the base body.

[0012] The above duct holder may include an extension portion extending from the duct body along the protruding direction of the duct bearing, and a holder portion bent from the extension portion. The support bearing may be located at an end of the holder portion.

[0013] The above-mentioned spray rotor may include a spray port that sprays washing water within a space formed by the base body and the nozzle body toward the basket to wash dishes accommodated in the basket.

[0014] The above nozzle may include a propulsion nozzle on the outer circumferential surface of the injection rotor.

[0015] The above nozzle may further include an upper nozzle formed in the nozzle body and configured to spray washing water in a direction different from the direction in which washing water is sprayed by the propelling nozzle.

[0016] The above nozzle body may include a nozzle portion having a channel having a cross-sectional area corresponding to the cross-sectional area of ​​the channel of the duct bearing, so as to form a distribution channel together with the duct bearing.

[0017] The above duct body may include a curved portion that prevents a decrease in the flow rate of the washing water flowing from the duct body to the flow path of the duct bearing.

[0018] The above nozzle part may be arranged so that the cross-sectional area of ​​the flow path of the nozzle part increases as it moves away from the duct bearing.

[0019] The above nozzle part may include a sealing part that surrounds the duct bearing to prevent washing water from flowing out between the nozzle part and the duct bearing.

[0020] The duct holder may include an elastic material so as to be elastically deformable while the nozzle body is coupled to the duct bearing and the base body is positioned to be supported by the duct holder.

[0021] The above basket may include a bottom portion provided to support the tableware. The duct body may be located above the bottom portion.

[0022] The above bottom part may include an inclined support part provided to support the dish in an inclined direction downward, and a duct support part connected to the inclined support part and having the duct body mounted thereon.

[0023] The above-mentioned spray rotor may be located at the lower side of the duct body to spray washing water onto dishes supported on the inclined support.

[0024] The dishwasher may include a plurality of duct bearings and a plurality of duct holders arranged at predetermined intervals along a direction in which the duct body extends in the longitudinal direction. The dishwasher may include a plurality of spray rotors. The duct holders of the plurality of duct holders, together with the duct bearings of the plurality of duct bearings, may each support the spray rotors of the plurality of spray rotors.

[0025] According to one embodiment, a dishwasher may include a basket including a bottom portion for supporting dishes, a duct including a duct body positioned above the bottom portion, a duct holder including a duct bearing protruding from the duct body and a support bearing facing the duct bearing, a duct holder including a duct body in which washing water is movably provided, and a spray rotor that receives washing water from the duct bearing and sprays washing water to wash the dishes, the spray rotor being rotatably coupled between the duct bearing and the support bearing.

[0026] According to one embodiment, a dishwasher may include a tub, a basket located inside the tub and including a bottom portion for supporting dishes, a duct in which washing water is provided to move, the duct including a duct body positioned above the bottom portion, a duct bearing protruding from the duct body, and a duct holder including a support bearing facing the duct bearing, and a spray rotor that receives washing water from the duct bearing and sprays washing water to wash the dishes, the spray rotor including a nozzle body that is rotatably coupled between the duct bearing and the support bearing, and the spray rotor may include a nozzle body that is rotatably coupled to the duct bearing and receives washing water from the duct bearing, and a base body that is rotatably supported by the support bearing.

[0027] FIG. 1 is a perspective view illustrating a dishwasher according to one embodiment.

[0028] Fig. 2 is a cross-sectional view showing a cut section of the dishwasher of Fig. 1.

[0029] FIG. 3 is a front view showing a portion of a dishwasher according to one embodiment.

[0030] FIG. 4 is a perspective view illustrating a part of a dishwasher according to one embodiment.

[0031] Figure 5 is a drawing showing the basket, duct, and spray rotor in Figure 4 in an exploded view.

[0032] Figure 6 is a perspective view illustrating a duct and a spray rotor according to one embodiment.

[0033] Figure 7 is an exploded perspective view showing the duct and the injection rotor disassembled.

[0034] Figure 8 is a drawing showing the duct and injection rotor of Figure 7 disassembled and viewed from a different angle.

[0035] Figure 9 is an exploded view showing an exploded view of an injection rotor according to one embodiment.

[0036] Fig. 10 is a side view showing the joint structure of the duct and the injection rotor of Fig. 6.

[0037] Fig. 11 is a cross-sectional view of the duct and injection device of Fig. 6 taken along the extension direction of the duct.

[0038] Figure 12 is a drawing showing the action of washing water sprayed from the spray rotor by showing the spray rotor from the top.

[0039] The embodiments described in this specification and the configurations illustrated in the drawings are merely preferred examples of the disclosed invention, and there may be various modified examples that can replace the embodiments and drawings of this specification at the time of filing of this application.

[0040] Additionally, the same reference numbers or symbols presented in each drawing of this specification represent parts or components that perform substantially the same function.

[0041] In addition, the terminology used in this specification is used to describe embodiments and is not intended to limit and / or restrict the disclosed invention. The singular expression includes plural expression unless the context clearly indicates otherwise. In this specification, the terms "comprise" or "have" and the like are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0042] Additionally, terms including ordinal numbers such as “first,” “second,” etc. used herein may be used to describe various components, but the components are not limited by the terms, and the terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The term “and / or” includes any combination of a plurality of related listed items or any item among a plurality of related listed items.

[0043] Meanwhile, the terms “upper and lower directions,” “lower side,” and “front and rear directions” used in the following description are defined based on the drawings, and the shape and position of each component are not limited by these terms.

[0044] Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

[0045] Fig. 1 is a perspective view illustrating a dishwasher according to one embodiment. Fig. 2 is a cross-sectional view illustrating a cut section of the dishwasher of Fig. 1.

[0046] 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).

[0047] A dishwasher (1) may include a tub (12) provided inside a main body (10). The tub (12) may form a washing room (10a). 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.

[0048] A dishwasher (1) may include a door (11). The door (11) may be provided to open and close a tub (12). The door (11) may be provided to open and close an opening (12a) of the tub (12). The door (11) may be provided to open and close a washing chamber (10a). The door (11) may be installed on the main body (10) to open and close the tub (12). The door (11) may be rotatably mounted on the main body (10). The door (11) may be detachably mounted on the main body (10).

[0049] The dishwasher (1) may include a storage container (50). The storage container (50) may be provided inside the tub (12). The storage container (50) may accommodate dishes. The storage container (50) may store dishes. The storage container (50) may load dishes. The storage container (50) may hold dishes.

[0050] The storage container (50) may include at least one basket for storing tableware. The storage container (50) may include at least one rack assembly for storing tableware. The basket and the rack assembly are interchangeable. It should be noted that the basket described below may also be referred to as a rack assembly.

[0051] For example, the storage container (50) may include a plurality of baskets (51, 52, 53). The plurality of baskets (51, 52, 53) may be provided to store various dishes. However, the present invention is not limited thereto. For example, the storage container (50) may include only some of the plurality of baskets (51, 52, 53). For example, the storage container (50) may further include additional baskets other than the plurality of baskets (51, 52, 53). For example, the storage container (50) may include a single basket.

[0052] The storage container (50) may include an intermediate basket (52) positioned in the middle in the height direction of the dishwasher (1). The intermediate basket (52) may be designed to be withdrawn from the tub (12) or introduced into the tub (12). For example, the intermediate basket (52) may be designed to be supported by an intermediate guide rack (not shown). For example, the intermediate guide rack (not shown) may be installed on a side (12c) of the tub (12) so as to be slidable toward an opening (12a) of the tub (12).

[0053] The storage container (50) may include a lower basket (51) positioned at the bottom in the height direction of the dishwasher (1). The lower basket (51) may be provided to be withdrawn from the tub (12) or introduced into the tub (12). For example, the lower basket (51) may be provided to be supported on a lower guide rack (13a). For example, the lower guide rack (13a) may be installed on a side surface (12c) of the tub (12) so as to be slidable toward an opening (12a) of the tub (12).

[0054] 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) can store not only relatively large dishes but also relatively small dishes.

[0055] The storage container (50) 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 so that relatively small-volume dishes can be stored therein. For example, cooking tools or cutlery such as ladles, knives, and spatulas can be stored in the upper basket (53). For example, small-sized dishes such as cups can be stored in the upper basket (53). However, this is merely an example, and the types of dishes stored in the upper basket (53) are not limited to the above examples.

[0056] The upper basket (53) may be designed to be pulled out from the tub (12) or introduced into the tub (12). For example, the upper basket (53) may be slidably moved by the upper guide rack (13c). For example, the upper basket (53) may be designed to be supported by the upper guide rack (13c). For example, the upper guide rack (13c) may be installed on the side (12c) of the tub (12).

[0057] The dishwasher (1) may include a washing room (10a), which is a space formed inside a tub (12). The washing room (10a) may be defined as an inner space of the tub (12). The washing room (10a) may refer to a space in which dishes placed in a storage container (50) can be washed and dried using washing water.

[0058] The dishwasher (1) may include a spray device (40) configured to spray washing water. The spray device (40) may spray washing water into a washing chamber (10a). The spray device (40) may spray washing water toward dishes stored in a storage container (50). The spray device (40) may receive washing water from a sump (70) to be described later.

[0059] The spray device (40) may include at least one spray arm. The spray device (40) may include a plurality of spray units (41, 42, 43).

[0060] For example, the spray device (40) may include a first spray unit (41) disposed at the bottom of the lower basket (51) in the height direction of the dishwasher (1). For example, the spray device (40) may include a second spray unit (42) disposed at the bottom of the middle basket (52) in the height direction of the dishwasher (1). For example, the spray device (40) may include a third spray unit (43) disposed at the top of the upper basket (53) in the height direction of the dishwasher (1). However, the number of spray units is not limited to the above examples. The spray device (40) may include two or fewer spray units. The spray device (40) may include four or more spray units.

[0061] The spray units (41, 42, 43) may include a spray arm. The operation of the spray arm will be briefly described using the second spray unit (42) as an example. The description of the second spray unit (42) may be applied to the first spray unit (41) and / or the third spray unit (43).

[0062] The second spray unit (42) may include a spray arm. The spray arm may be arranged to be rotatable relative to the duct (100). The spray arm may spray the cleaning water while rotating relative to the duct (100).

[0063] The spray arm may have a shape extending in one direction. The spray arm may extend in a direction perpendicular to the rotational axis. Alternatively, the spray arm may extend along the diameter of a circle drawn by the rotation of the spray arm.

[0064] The spray arm may form a flow path through which the washing water flows. The second spray unit (42) may include a spray hole for spraying the washing water. The spray hole may be formed in the spray arm. For example, a plurality of spray holes may be provided. For example, the plurality of spray holes may be arranged to be spaced apart from each other along the extension direction of the spray arm.

[0065] An injection device (40) according to one embodiment of the present disclosure may include an injection rotor (200).

[0066] The spray rotor (200) can rotate while spraying the washing water. That is, the spray rotor (200) can rotate by spraying the washing water. The spray rotor (200) can be rotatably coupled to a duct (100) to be described later.

[0067] The dishwasher (1) may include a sump (70). The sump (70) may be provided to receive wash water. The sump (70) may collect wash water from the wash room (10a). For example, to facilitate the smooth collection of water in the sump (70), the lower surface (12b) of the tub (12) may be provided to slope downward toward the sump (70). Wash water from the wash room (10a) may flow along the slope of the lower surface (12b) of the tub (12) and smoothly flow into the sump (70). In addition, the sump (70) may be provided to provide the collected wash water to the spray device (40).

[0068] The dishwasher (1) may include a circulation pump (71) configured to pump washing water stored in a sump (70). The circulation pump (71) may be provided as a component of the sump (70). For example, the circulation pump (71) may be placed in the machine room (10b). Washing water pumped by the circulation pump (71) may flow to the spray device (40).

[0069] The dishwasher (1) may include a drain pump (72) for draining wash water and / or foreign substances (e.g., food waste, etc.) remaining in the sump (70). The drain pump (72) may be provided as a component of the sump (70). For example, the drain pump (72) may be placed in the machine room (10b).

[0070] The dishwasher (1) may include a machine room (10b), which is a space provided below the tub (12). The machine room (10b) may be a place where a structure for circulating wash water is arranged. The dishwasher (1) may include a base frame (16) forming the machine room (10b).

[0071] For example, at least a portion of the sump (70) may be placed in the machine room (10b). Most of the sump (70) may be placed in the machine room (10b). That is, the area of ​​the sump (70) located in the washing room (10a) may be smaller than the area of ​​the sump (70) located in the machine room (10b). By reducing the area of ​​the sump (70) occupying the washing room (10a), the area of ​​the washing room (10a) can be secured. Thereby, the capacity of the washing room (10a) can be increased, and the dish storage capacity can be improved.

[0072] The dishwasher (1) may include a filter assembly (60). The filter assembly (60) may be provided to filter foreign substances contained in wash water flowing into a sump (70). Wash water filtered through the filter assembly (60) may be pumped by a circulation pump (71) and provided to a spray device (40). The filter assembly (60) may be detachably mounted to the sump (70). For example, the filter assembly (60) may include at least one of a fine filter, a coarse filter, or a micro filter.

[0073] The dishwasher (1) may include an inlet duct (14) provided to allow washing water to flow in from a sump (70). In addition, the dishwasher (1) may include a duct (100) for guiding the washing water flowing in through the inlet duct (14) to a spray rotor (200).

[0074] The inlet duct (14) and duct (100) can be placed within the tub (12). The duct assembly can be placed in the wash room (10a).

[0075] An inlet duct (14) may be provided between the sump (70) and the duct (100). For example, the duct (100) may be provided between the inlet duct (14) and the injection device (40). For example, the inlet duct (14) and the duct (100) may be provided as a duct assembly.

[0076] However, the present invention is not limited to the above-described example, and the inlet duct (14) and the duct (100) may be provided as an integral structure. In this case, the integral duct may directly guide the washing water flowing in from the sump (70) to the spray device (40).

[0077] Fig. 3 is a front view illustrating a 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 view of the basket, duct, and spray rotor of Fig. 4.

[0078] Referring to FIGS. 3 to 5, a dishwasher (1) according to one embodiment may include a duct (100) provided to supply washing water to a spray rotor (200).

[0079] The duct (100) can extend in one direction. The duct (100) can be arranged in the front-back direction.

[0080] The duct (100) may be positioned on the upper side of the basket (53). The duct (100) may be mounted on the upper side of the basket (53). The duct (100) may be provided to supply washing water for washing dishes supported in the basket (53).

[0081] The basket (53) may include a bottom portion (531) designed to support dishes. The bottom portion (531) may form the base of the basket (53). For example, the bottom portion (531) may be formed by wires (53a, 53b) described below. The bottom portion (521) may be referred to as a bottom frame.

[0082] The first wire (53a) and the second wire (53b) may be arranged orthogonally to each other. For example, as illustrated, the first wire (53a) may extend in the left-right direction, and the second wire (53b) may extend in the front-back direction. The first wire (53a) and the second wire (53b) may be spaced apart from each other and intersect.

[0083] The wires (53a, 53b) may be provided in multiple numbers, and the multiple wires (53a, 53b) may be formed into an integral basket (53) through welding, deep drawing, or other operations. That is, multiple openings (not shown) may be formed between the first wire (53a) and the second wire (53b).

[0084] The basket (53) may include a side portion (532). The side portion (532) may be configured to surround the bottom portion (531). The side portion (532) may have a shape extending upward from the edge of the bottom portion (531). For example, the side portion (532) may be formed in a frame shape by wires (53a, 53b) to be described later. The side portion (532) may be referred to as a side frame.

[0085] The bottom portion (531) may include a horizontal support portion (5311) extending horizontally. The horizontal support portion (5311) may form at least a portion of the bottom portion (531). The horizontal support portion (5311) may support the dish horizontally.

[0086] The bottom portion (531) may include inclined support portions (5312a, 5312b) that are provided to support tableware at an angle. The inclined support portions (5312a, 5312b) may extend from the horizontal support portion (5311). The inclined support portions (5312a, 5312b) may be formed to be inclined downward. That is, the tableware supported on the inclined support portions (5312a, 5312b) may be placed with one open side facing downward.

[0087] The inclined support (5312a, 5312b) may include a first inclined support (5312a) and a second inclined support (5312b) which are provided to have different inclinations and / or lengths.

[0088] The first inclined support (5312a) and the second inclined support (5312b) may be provided with different inclinations. As illustrated, the first inclined support (5312a) may have a smaller inclination than the second inclined support (5312b). That is, the first inclined support (5312a) may have a longer length than the second inclined support (5312b). Accordingly, dishes with a taller height can be placed on the first inclined support (5312a), and dishes with a shorter height can be placed on the second inclined support (5312b).

[0089] The first inclined support (5312a) and the second inclined support (5312b) can support tableware having a certain height. For example, the first inclined support (5312a) and the second inclined support (5312b) can support cups, etc. However, the tableware that can be placed on the first inclined support (5312a) and the second inclined support (5312b) is not limited thereto, and any other type of tableware may be placed thereon.

[0090] The bottom portion (531) may include a duct support portion (5313) connected to the inclined support portion (5312a, 5312b). The duct support portion (5313) may be provided so that the duct body (110) is secured thereto.

[0091] The duct support (5313) may be arranged along one direction to support the duct body (110) extending in one direction. For example, the duct support (5313) may be arranged along the front-back direction.

[0092] The duct supports (5313) may be arranged at a predetermined interval. The bottom portion (531) may include a rotor opening (533a) provided between the duct supports (5313) to allow the spray rotor (200) to pass therethrough. That is, the duct (100) may be positioned above the duct supports (5313), and the spray rotor (200) may be positioned below the duct supports (5313).

[0093] A space may be formed between the first inclined support (5312a) and the second inclined support (5312b) on the lower side of the duct support (5313). The injection rotor (200) may be positioned between the first inclined support (5312a) and the second inclined support (5312b).

[0094] The open side of the dishes supported on the inclined support member (5312a, 5312b) can be supported toward the spray rotor (200). The spray rotor (200) can spray washing water into the inside of the dishes through the open side of the dishes.

[0095] The duct (100) may be positioned above the bottom portion (531). That is, the duct (100) may be positioned above the horizontal support portion (5311), the inclined support portions (5312a, 5312b), and the duct support portion (5313) that constitute the bottom portion (531). In other words, the duct support portion (5313) on which the duct (100) is secured may be positioned above the horizontal bottom portion (5311). The duct support portion (5313) may be positioned at at least the same height as the horizontal bottom portion (5311).

[0096] Since the duct (100) is positioned above the bottom portion (531), the spray rotor (200) can be positioned between the inclined support portions (5312a, 5312b). That is, since the spray rotor (200) can be positioned to face the open side of the dish, the inside of the dish can be washed evenly.

[0097] In addition, the spray rotor (200) can drain the residual water inside the duct (100). Since the duct (100) is extended relatively long in one direction, the washing water inside the duct (100) may not flow and may remain. In particular, after the operation of the dishwasher (1) is finished, if the washing water is not supplied, the washing water does not flow, so residual water may be generated inside the duct (100). Since the spray rotor (200) is arranged below the duct (100), the residual water inside the duct (100) can be drained to the spray rotor (200).

[0098] In addition, since the duct (100) is positioned above the bottom portion (531), the size of the injection rotor (200) positioned below the duct (100) can be increased. As the size of the injection rotor (200) increases, the rotational force generated from the propulsion injection port (200a) described later increases, allowing the rotation of the injection rotor (200) to occur more smoothly. In addition, the rotation of the injection rotor (200) can be prevented from stopping.

[0099] In addition, since the duct (100) is positioned higher than the bottom portion (531), dishes supported by the inclined support portions (5312a, 5312b) can also be supported by the duct (100). Specifically, the dishes can be supported by the inclined support portions (5312a, 5312b) and the duct body (110).

[0100] In addition, since the duct (100) is positioned higher than the bottom portion (531), the vertical length of the spray rotor (200) can be secured. Specifically, the length of the nozzle portion (211) of the spray rotor (200) to be described later can be secured. By securing the length of the nozzle portion (211), the inside of the nozzle portion (211) can be provided with a venturi tube structure in which the diameter gradually increases. In other words, the flow rate of the washing water flowing into the nozzle portion (211) can be secured.

[0101] The duct (100) may be provided to supply washing water to the spray rotor (200). The spray rotor (200) may be positioned at the lower side of the duct (100). Washing water flowing inside the duct (100) may flow to the spray rotor (200) by gravity.

[0102] The spray rotor (200) may be positioned at the lower side of the duct (100). The spray rotor (200) may be rotatably coupled to the duct (100). The spray rotor (200) may obtain rotational force from the force of spraying the washing water. The spray rotor (200) may rotate at the lower side of the duct (100) and spray the washing water.

[0103] The spray rotor (200) can spray washing water in various directions while rotating. The spray rotor (200) can spray washing water toward dishes placed around it.

[0104] Fig. 6 is a perspective view illustrating a duct and a spray rotor according to one embodiment. Fig. 7 is an exploded perspective view illustrating the duct and the spray rotor in an exploded state. Fig. 8 is a view illustrating the duct and the spray rotor of Fig. 7 in an exploded state from a different angle.

[0105] Referring to FIGS. 6 to 8, the joint structure of the duct (100) and the injection rotor (200) will be described.

[0106] The duct (100) may include a duct body (110) that forms a flow path (110f, see FIG. 2) through which the washing water flows. The duct (100) may be arranged so that the duct body (110) extends in one direction. For example, the duct body (110) may be arranged in the front-rear direction.

[0107] A plurality of injection rotors (200) may be provided. A plurality of injection rotors (200) may be arranged at a predetermined interval along the extension direction of the duct (100).

[0108] The duct (100) may include a plurality of duct holders (130) arranged to rotatably support a plurality of spray rotors (200). That is, the plurality of duct holders (130) and the plurality of spray rotors (200) may be coupled so that each spray rotor (200) can rotate.

[0109] In this example, one injection rotor (200) and one duct holder (130) are described, but this description can be applied to multiple injection rotors (200) and multiple duct holders (130).

[0110] The duct body (110) may include a connection portion (111) configured to receive washing water from an inlet duct (14). The connection portion (111) may be connected to the inlet duct (14) that receives washing water from a sump (70, see FIG. 2). However, the present invention is not limited thereto, and for example, the connection portion (111) may be directly connected to the sump (70).

[0111] The duct body (110) may include a support guide (112) that is provided to be supported by a duct support member (5313). The support guide (112) may guide the duct (100) to be placed on the duct support member (5313).

[0112] The support guide (112) may be supported by a duct support member (5313). The support guide (112) may include a contact member (1121, see FIG. 10) that is provided to be supported by the duct support member (5313). Specifically, the contact member (1121) may be positioned at the front of the duct body (110) and may be supported by the duct support member (5313) that is positioned most forward among the duct support members (5313).

[0113] The duct body (110) may include an insertion guide (113) into which at least a portion of the duct support (5313) is inserted. The insertion guide (113) may be provided such that at least a portion of the duct support (5313) is fitted between the duct body (110) and the insertion guide (113).

[0114] The duct support (5313) can be inserted and fixed into the gap formed between the insertion guide (113) and the duct body (110). The insertion guide (113) can be formed on a part of the duct body (110). After the duct support (5313) is inserted between the insertion guide (113) and the duct body (110), the support guide (112) can be arranged to come into contact with the duct support (5313) located most forward.

[0115] The duct body (110) can be easily mounted to or disassembled from the duct support (5313) by having the support guide (112) contact the duct support (5313) located most forward after at least a portion of the duct support (5313) is inserted into the insertion guide (113).

[0116] The duct supports (5313) may be arranged at a predetermined interval. The bottom portion (531) may include a rotor opening (533a) provided to allow the injection rotor (200) to pass between the duct supports (5313).

[0117] The injection rotor (200) can be coupled to the lower side of the duct (100). With the injection rotor (200) coupled to the lower side of the duct (100), the duct (100) can be seated on the duct support (5313). That is, the injection rotor (200) can pass through the rotor opening (533a) and be positioned lower than the duct support (5313).

[0118] The injection rotor (200) can be rotatably coupled to the duct (100).

[0119] The duct (100) may include a duct bearing (120) for supplying washing water from the duct body (110) to the spray rotor (200). The duct bearing (120) may be rotatably coupled to the spray rotor (200).

[0120] The duct bearing (120) may protrude downward from the duct body (110). The duct bearing (120) may be arranged so that the washing water flowing through the flow path (110f, see FIG. 2) inside the duct body (110) is supplied to the spray rotor (200).

[0121] The duct (100) may include a duct holder (130) arranged to rotatably support the injection rotor (200) together with a duct bearing (120).

[0122] The duct holder (130) may include a support bearing (133) positioned to face the duct bearing (120). The support bearing (133) may be positioned at a predetermined distance from the duct bearing (120). The injection rotor (200) may be coupled between the duct bearing (120) and the support bearing (133).

[0123] The duct holder (130) may include an extension (131) extending from the duct body (110) along the protrusion direction of the duct bearing (120). The extension (131) may form a gap for the injection rotor (200) to be coupled between the duct bearing (120) and the support bearing (133).

[0124] The duct (100) may be formed integrally. Specifically, the duct body (110), the duct bearing (120), and the duct holder (130) may be formed integrally. Since the duct body (110) and the duct holder (130) are formed integrally, the gap between the duct bearing (120) and the duct holder (130) can be manufactured to be constant. Accordingly, the tolerance of the injection rotor (200) coupled between the duct bearing (120) and the duct holder (130) can be minimized.

[0125] In addition, the duct holder (130) may include an elastically deformable material. The spray rotor (200) may have a height corresponding to the gap between the duct bearing (120) and the duct holder (130). That is, when the spray rotor (200) is coupled between the duct bearing (120) and the duct holder (130), the duct holder (130) needs to be elastically deformed. In order for the spray rotor (200) to be coupled, a part of the duct holder (130) needs to be elastically deformed, thereby increasing the gap between the duct bearing (120) and the duct holder (130). Therefore, the duct holder (130) may be designed to be elastically deformed.

[0126] The duct holder (130) may include a holder portion (132) that is bent from an extension portion (131). The holder portion (132) may extend in approximately the same direction as the extension direction of the duct body (110). That is, the extension portion (131) and the holder portion (132) may be formed to be approximately orthogonal. However, the shape of the duct holder (130) is not limited thereto, and may be provided in any shape as long as the support bearing (133) is arranged to face the duct bearing (120).

[0127] The support bearing (133) may be located at the end of the holder portion (132). In other words, the support bearing (133) may be formed at a position opposite to the position at which the holder portion (132) is bent from the extension portion (131).

[0128] The support bearing (133) may include a support end (133a) whose cross-sectional area decreases toward the spray rotor (200) in order to reduce frictional force generated while supporting the spray rotor (200).

[0129] The support end (133a) may have a roughly pointed shape. However, it may be formed to have surface contact so that the injection rotor (200) has a certain level of stability for rotation.

[0130] The spray rotor (200) may be rotatable. The spray rotor (200) may be rotatable while being coupled between the duct bearing (120) and the support bearing (133). The spray rotor (200) may be rotated by spraying the washing water.

[0131] The spray rotor (200) may include a nozzle body (210) provided to receive washing water. The nozzle body (210) may be rotatably coupled to a duct bearing (120).

[0132] The spray rotor (200) may include a base body (220) that is provided to be coupled with the nozzle body (210) so that the washing water introduced into the nozzle body (210) is received. The base body (220) may form a space therein together with the nozzle body (210) in which the washing water is received.

[0133] The base body (220) can be rotatably supported by a duct holder (130).

[0134] The base body (220) may include a recessed portion (221) that is sunken so that the support bearing (133) comes into contact with it. The recessed portion (221) of the base body (220) may be rotatably supported by the support bearing (133) of the duct holder (130). Specifically, the base body (220) may come into contact with the support end (133a) of the support bearing (133).

[0135] The spray rotor (200) may include a propulsion nozzle (200a) formed on the outer surface of the spray rotor (200). The propulsion nozzle (200a) may generate rotational force of the spray rotor (200) by spraying washing water. The propulsion nozzle (200a) may be formed to form a predetermined angle with respect to the radial direction of the spray rotor (200).

[0136] Since the propulsion nozzles (200a) are formed on the outer surface of the spray rotor (200), they can be spaced apart by approximately the radius of the spray rotor (200). That is, the magnitude of the moment generated by the tangential force of the spray rotor (200) among the force components caused by the cleaning water sprayed from the propulsion nozzles (200a) can be maximized.

[0137] The spray rotor (200) may include an upper spray port (210a, see FIG. 12) that is arranged to spray the washing water in a direction different from the spraying direction of the propellant spray port (200a).

[0138] The upper injection port (210a) may be formed in the nozzle body (210). The upper injection port (210a) may be formed by an upper injection port forming part (212). The upper injection port (210a) may spray the washing water upward along the radial direction of the injection rotor (200).

[0139] The upper injection port (210a) may be formed along the radial direction of the injection rotor (200). However, the present invention is not limited thereto, and the upper injection port (210a) may be formed to form a predetermined angle with the radial direction of the injection rotor (200), similar to the propulsion injection port (200a). That is, the upper injection port (210a) may also spray cleaning water to generate rotational force of the injection rotor (200).

[0140] In this way, by providing different spray directions for the upper nozzle (210a) and the propulsion nozzle (200a), the efficiency of washing dishes can be improved.

[0141] In this city, the number of propellant nozzles (200a) and upper nozzles (210a) is illustrated as one each, but this is not limited thereto. The position, size, and / or number of the propellant nozzles (200a) and upper nozzles (210a) are not limited thereto, and may have various shapes and / or structures.

[0142] Figure 9 is an exploded view showing an exploded view of an injection rotor according to one embodiment.

[0143] Referring to FIG. 9, an injection rotor (200) according to one embodiment of the present disclosure may be formed by combining a nozzle body (210) and a base body (220). The injection rotor (200) may include a sealing body (230) provided to cover a joint portion of the nozzle body (210) and the base body (220).

[0144] The nozzle body (210) may include a nozzle body coupling portion (2101). The nozzle body coupling portion (2101) may be formed along the circumferential direction of the nozzle body (210). The nozzle body coupling portion (2101) may have a shape protruding from the outer peripheral surface of the nozzle body (210).

[0145] The base body (220) may include a base body connecting portion (2201). The base body connecting portion (2201) may be formed along the circumference of the base body (220). The base body connecting portion (2201) may have a shape protruding from the outer surface of the base body (220).

[0146] The nozzle body coupling portion (2101) and the base body coupling portion (2201) can be positioned to correspond to each other. The nozzle body coupling portion (2101) and the base body coupling portion (2201) can be inserted into the coupling groove (231) of the sealing body (230) while being coupled.

[0147] The coupling groove (231) can accommodate the nozzle body coupling portion (2101) and the base body coupling portion (2201). That is, the sealing body (230) can cover the gap between the nozzle body coupling portion (2101) and the base body coupling portion (2201). Accordingly, it is possible to prevent the washing water from leaking between the nozzle body coupling portion (2101) and the base body coupling portion (2201).

[0148] The nozzle body (210) and the base body (220) can form a propulsion nozzle (200a) together. The nozzle body (210) can include a first nozzle forming part (213). The base body (220) can include a second nozzle forming part (223). That is, the first nozzle forming part (213) and the second nozzle forming part (223) can form a propulsion nozzle (200a).

[0149] The propulsion nozzle (200a) may not be covered by the sealing body (230). The sealing body (230) may be cut in a portion corresponding to the first nozzle forming portion (213) and the second nozzle forming portion (223).

[0150] A base body (220) according to one embodiment of the present disclosure may include a drainage portion (224) formed to prevent residual water.

[0151] Washing water may remain inside the spray rotor (200). Alternatively, food particles stuck on dishes may enter the interior of the spray rotor (200) through the propellant nozzle (200a) or the upper nozzle (210a). This may contaminate the interior of the spray rotor (200) or result in dishes being washed with contaminated washing water. Therefore, it is necessary to discharge the washing water or food particles inside the spray rotor (200).

[0152] The drainage part (224) may be formed by being sunken into the inside of the base body (220). The drainage part (224) may be formed to be inclined downward toward the propulsion nozzle (200a). Washing water or food waste remaining in the drainage part (224) may be drained through the propulsion nozzle (200a).

[0153] In addition, residual water inside the duct (100) can be drained. Since the duct (100) is extended relatively long in one direction, the washing water inside the duct (100) may not flow and may remain. In particular, after the operation of the dishwasher (1) is finished, if washing water is not supplied, the washing water does not flow, and thus residual water may form inside the duct (100).

[0154] Since the injection rotor (200) is located at the lower side of the duct (100), residual water inside the duct (100) can flow into the injection rotor (200) through the duct bearing (120). The residual water that has flowed into the injection rotor (200) can be discharged to the propulsion injection port (200a) through the drain (224).

[0155] Although the injection rotor (200) according to one embodiment of the present disclosure has been described as having a nozzle body (210) and a base body (220) that are separate, this is not limited thereto. The nozzle body (210) and the base body (220) may be formed integrally. In addition, the nozzle body (210), the base body (220), and / or the sealing body (230) may be formed integrally. In addition, when the nozzle body (210) and the base body (220) are formed integrally, a separate sealing body (230) may be unnecessary.

[0156] Fig. 10 is a side view illustrating the combined structure of the duct and the spray rotor of Fig. 6. Fig. 11 is a cross-sectional view of the duct and spray device of Fig. 6 taken along the extension direction of the duct. Fig. 12 is a view illustrating the action of the washing water sprayed from the spray rotor by illustrating the spray rotor from above.

[0157] Referring to FIGS. 10 to 12, an injection rotor (200) according to one embodiment of the present disclosure can be rotatably coupled to the lower portion of a duct (100).

[0158] The spray rotor (200) can rotate by spraying the washing water flowing through the flow path (110f) formed inside the duct (100). The duct (100) can be arranged so that the washing water moves through a duct bearing (120) protruding from the duct body (110).

[0159] The nozzle portion (211) of the nozzle body (210) can be rotatably coupled with the duct bearing (120). The nozzle portion (211) can be coupled to the outside of the duct bearing (120). Specifically, the nozzle portion (211) can be coupled to surround the duct bearing (120). The nozzle portion (211) can be coupled to the duct bearing (120) at a slight distance therefrom so that the spray rotor (200) can rotate smoothly.

[0160] The nozzle unit (211) may have a flow path cross-sectional area corresponding to the flow path cross-sectional area of ​​the duct bearing (120) so as to form a distribution flow path (P) together with the duct bearing (120).

[0161] The duct bearing (120) can form a flow path (120f) for supplying washing water to the spray rotor (200). The nozzle unit (211) can form a flow path (211f) that is in communication with the flow path (120f) of the duct bearing (120). That is, the diameters of the connecting portions of the flow path (120f) of the duct bearing (120) and the flow path (211f) of the nozzle unit (211) may correspond. Accordingly, the washing water passing through the boundary between the flow path (120f) of the duct bearing (120) and the flow path (211f) of the nozzle unit (211) may have little change in flow velocity.

[0162] The duct body (110) may include a curved portion (114) provided to prevent a decrease in flow rate when the washing water flowing in the flow path (110f) formed inside the duct body (110) flows to the duct bearing (120).

[0163] The curved portion (114) has a curved shape so as not to obstruct the flow of washing water, thereby preventing a decrease in the flow rate of washing water. When washing water flowing through the flow path (110f) inside the duct body (110) flows to the duct bearing (120), a flow rate above a certain level can be secured.

[0164] The flow path (120f) of the duct bearing (120) may have a constant cross-sectional area. That is, the washing water flowing inside the duct bearing (120) may not experience a large change in flow rate. On the other hand, the cross-sectional area of ​​the flow path (211f) of the nozzle portion (211) may gradually increase as the washing water flows. That is, the cross-sectional area of ​​the flow path (211f) of the nozzle portion (211) may increase as it moves toward the base body (220).

[0165] Accordingly, the washing water flowing through the distribution path (P) may have a slower flow rate as it passes through the path (120f) of the duct bearing (120) and the path (211f) inside the nozzle unit (211). As the cross-sectional area of ​​the path increases, the flow rate decreases, and thus, the flow rate may become slower as it approaches the base body (220). For example, the flow rate (v1) of the path (120f) of the duct bearing (120) may be greater than the flow rate (v2) on the downstream side of the nozzle unit (211).

[0166] In this way, the flow velocity at the joint portion of the duct bearing (120) and the nozzle portion (211) can be sufficiently large. Accordingly, leakage through the gap between the joint portion of the duct bearing (120) and the nozzle portion (211) can be minimized.

[0167] However, some of the washing water may seep between the joint portion of the duct bearing (120) and the nozzle portion (211). Even if some of the washing water seeps between the joint portion of the duct bearing (120) and the nozzle portion (211), the frictional force between the duct bearing (120) and the nozzle portion (211) can be reduced. Therefore, it can be helpful for the rotation of the spray rotor (200).

[0168] The nozzle part (211) may include a sealing part (2111a, 2111b) that is provided to surround the duct bearing (120) to prevent the washing water from flowing out through the gap between the duct bearing (120) and the nozzle part (211).

[0169] The sealing portions (2111a, 2111b) may have a size corresponding to the outer diameter of the duct bearing (120) so as to accommodate the duct bearing (120). When the duct bearing (120) is accommodated in the sealing portions (2111a, 2111b), the washing water passing through the distribution path (P) may have to pass through the first sealing portion (2111a) and the second sealing portion (2111b) in sequence. In other words, a labyrinth seal structure that prevents the washing water from flowing out may be formed.

[0170] The sealing portion (2111) of the present disclosure is only an example, and the sealing portion (2111) may be provided so that the washing water goes through more sealing steps.

[0171] The nozzle body (210) may include an upper injection port forming portion (212) provided to form an upper injection port (210a). The upper injection port (210a) may spray the washing water upward along the radial direction of the injection rotor (200). However, the present invention is not limited thereto, and the upper injection port (210a) may be provided to have various shapes, sizes, and / or positions.

[0172] By providing different spray directions for the upper nozzle (210a) and the propulsion nozzle (200a), the efficiency of dishwashing can be improved. Furthermore, in addition to the upper nozzle (210a), an additional nozzle formed on the lower side of the base body (210) can be provided. In this case, the spray rotor (200) can spray washing water in a wider variety of directions.

[0173] In addition, the upper nozzle (210a) is illustrated as spraying the washing water in the same direction as the radial direction of the spray rotor (200), but is not limited thereto. The upper nozzle (210a) may also be positioned to form a predetermined angle with the radial direction of the spray rotor (200), thereby generating a rotational force.

[0174] The spray rotor (200) can spray cleaning water through a propulsion nozzle (200a) and / or an upper nozzle (210a). The spray rotor (200) can include a guide protrusion (222) to guide the cleaning water introduced through the distribution path (P) toward the propulsion nozzle (200a) and / or the upper nozzle (210a).

[0175] The guide protrusion (222) may be formed at a position corresponding to the rotation axis of the spray rotor (200). Therefore, the washing water introduced through the distribution path (P) can be uniformly distributed in a radial direction in the spray rotor (200) by the guide protrusion (222). That is, since the washing water flows uniformly inside the spray rotor (200), the spray rotor (200) can rotate stably. In other words, since the washing water inside the spray rotor (200) does not move unbalanced, the spray rotor (200) can be prevented from rotating unstably.

[0176] Referring to FIGS. 11 and 12, a force applied to rotate the injection rotor (200) according to one embodiment of the present disclosure will be described.

[0177] The spray rotor (200) can rotate in a direction opposite to the spraying direction of the washing water. Specifically, the washing water sprayed from the propulsion spray port (200a) can be sprayed along the direction in which the propulsion spray port (200a) is formed. That is, the washing water sprayed from the propulsion spray port (200a) can form a predetermined angle with respect to the radius (r1) direction of the spray rotor (200).

[0178] The washing water sprayed from the propulsion nozzle (200a) can generate a propulsive force in the opposite direction of Fr, which is a normal direction component in the direction of the radius (r1) of the spray rotor (200). At this time, since the distance from the rotational axis of the spray rotor (200) to Fr is equal to the radius (r1) of the spray rotor (200), the moment caused by the washing water sprayed from the propulsion nozzle (200a) can be equal to the size of Fr multiplied by the radius (r1) of the spray rotor (200).

[0179] The spray rotor (200) according to one embodiment of the present disclosure may have a smaller radius than the spray arms (41, 42, 43) of the spray device (40). Accordingly, the rotational force generated in the spray rotor (200) may be smaller.

[0180] However, by means of the coupling structure between the duct (100) and the injection rotor (200) according to one embodiment of the present disclosure, the injection rotor (200) can rotate smoothly by reducing the frictional force and the moment resulting therefrom acting on the injection rotor (200).

[0181] The injection rotor (200) can be rotatably supported by a duct bearing (120) and a support bearing (133).

[0182] The injection rotor (200) can rotate while in contact with the support bearing (133). The support bearing (133) can support the base body (220). Specifically, the support bearing (133) can support the recessed portion (221) of the base body (220).

[0183] The support bearing (133) may include a support end portion (133a) having a shape in which the cross-sectional area decreases as it moves toward the recessed portion (221) of the base body (220). In the rotation of the injection rotor (200), the support bearing (133) may be advantageous when the contact area with the recessed portion (221) is small. Accordingly, the cross-sectional area of ​​the support end portion (133a) may decrease as it moves toward the recessed portion (221).

[0184] However, the support bearing (133) may be in contact with a predetermined area so that the spray rotor (200) can rotate stably. That is, it may be provided so that it is closer to surface contact than point contact so that the spray rotor (200) can rotate stably. In this illustration, the support end (133a) is depicted as having a predetermined radius (r2).

[0185] That is, the moment due to the frictional force generated between the support end (133a) and the recessed portion (221) may be a value obtained by multiplying the frictional force by the radius (r2) of the support end (133a). Since the radius (r2) of the support end (133a) is small, both the frictional force and the moment generated thereby may be small. Accordingly, the rotation of the injection rotor (200) may be smooth.

[0186] Additionally, a frictional force may be applied between the duct bearing (120) and the nozzle portion (211). The frictional force between the duct bearing (120) and the nozzle portion (211) may be generated between the duct bearing (120) and the sealing portion (2111). Therefore, the moment due to the frictional force generated in the injection rotor (200) rotating about the duct bearing (120) as an axis may be a value obtained by multiplying the frictional force generated between the duct bearing (120) and the sealing portion (2111) by the distance to the sealing portion (r3).

[0187] While the injection rotor (200) rotates around the duct bearing (120), friction may occur between the duct bearing (120) and the sealing portion (2111). However, due to the labyrinth seal structure including the first sealing portion (2111a) and the second sealing portion (2111b), contact between the duct bearing (120) and the sealing portion (2111) may be minimized. That is, the frictional force generated between the duct bearing (120) and the sealing portion (2111) may be almost ineffective. Accordingly, the moment due to the frictional force generated between the duct bearing (120) and the sealing portion (2111) may also be almost ineffective.

[0188] In this way, even though the spray rotor (200) has a smaller size than the spray arms (41, 42, 43, see FIG. 2), the rotation of the spray rotor (200) can be smoothly achieved by minimizing the force that impedes the rotation of the spray rotor (200).

[0189] According to one embodiment, a dishwasher includes a tub (12), a basket (50) disposed inside the tub to receive dishes, a spray device (40) including a rotatable spray rotor (200) that sprays washing water to wash the dishes, and a duct (100) including a duct body (110) through which washing water flows, a duct bearing (120) provided to rotatably support the spray rotor and supply washing water from the duct body to the spray rotor, and a duct holder (130) provided to rotatably support the spray rotor together with the duct bearing, wherein the spray rotor includes a nozzle body (210) rotatably coupled to the duct bearing and provided to receive washing water from the duct bearing, and a base body (220) supported by the duct holder and coupled to the nozzle body to receive washing water introduced into the nozzle body.

[0190] The above duct holder may include a support bearing (133) positioned facing each other in a straight line with the duct bearing and having a section whose cross-sectional area decreases as it approaches the base body.

[0191] The above duct holder includes an extension portion (131) extending from the duct body along the protruding direction of the duct bearing, and a holder portion (132) bent from the extension portion, and the support bearing can be located at an end of the holder portion.

[0192] The above-mentioned spray rotor may include a spray port (200a, 210a) formed to spray the washing water inside the spray rotor toward the dishes.

[0193] The above nozzle may include a propulsion nozzle (200a) formed on the outer surface of the injection rotor.

[0194] The above nozzle is configured to spray the washing water in a direction different from the direction in which the above propulsion nozzle sprays, and may further include an upper nozzle (210a) formed in the nozzle body.

[0195] The above nozzle body may include a nozzle portion (211) having a flow path cross-sectional area corresponding to the flow path cross-sectional area of ​​the duct bearing, so as to form a distribution flow path (P) together with the duct bearing.

[0196] The above duct body may include a curved portion (114) formed to prevent a decrease in the flow rate of the washing water flowing from the duct body to the flow path of the duct bearing.

[0197] The above nozzle section may be arranged so that the cross-sectional area of ​​the flow path increases as it moves away from the duct bearing.

[0198] The above nozzle part may include a sealing part (2111) that is provided to surround the duct bearing to prevent washing water from flowing out between the nozzle part and the duct bearing.

[0199] The duct holder may include an elastic material so as to be elastically deformable while the spray rotor is coupled to the duct.

[0200] The above basket includes a bottom portion (531) provided to support the dishes, and the duct body may be positioned above the bottom portion.

[0201] The above bottom part may include an inclined support part (5312a, 5312b) provided to support the dish in an inclined manner toward the bottom, and a duct support part (5313) connected to the inclined support part and provided to allow the duct body to be seated thereon.

[0202] The above-mentioned spray rotor may be arranged on the lower side of the duct body to spray washing water onto the dishes placed on the inclined support.

[0203] The duct body extends in one direction, and the duct bearing and the duct holder are arranged in plurality at a predetermined interval along the one direction, and the spraying device may be provided in plurality so as to be rotatably coupled to the plurality of duct holders and the plurality of duct bearings, respectively.

[0204] According to one embodiment, a dishwasher may include a basket (50) including a bottom portion (531) for supporting dishes, a duct (100) including a duct body (110) positioned above the bottom portion as a duct through which washing water is provided to move, a duct bearing (120) protruding from the duct body, and a duct holder (130) including a support bearing arranged to face the duct bearing, and a spray rotor (200) that receives washing water from the duct bearing and sprays washing water to wash the dishes, the spray rotor being rotatably coupled between the duct bearing and the support bearing.

[0205] The above-mentioned spray rotor may include a nozzle body (210) that is rotatably coupled to the duct bearing and is provided to receive washing water from the duct bearing, and a base body (220) that is supported by the duct holder and coupled to the nozzle body so that washing water flowing into the nozzle body is received.

[0206] The above support bearing may include a support end (133a) whose diameter decreases as it approaches the base body.

[0207] The above-mentioned injection rotor may further include a propulsion injection port (200a) formed on the outer surface of the injection rotor, and an upper injection port (210a) formed on the nozzle body and configured to spray washing water in a direction different from the direction in which the propulsion injection port sprays.

[0208] According to one embodiment, a dishwasher includes a tub (12), a basket (300) disposed inside the tub and including a bottom portion for supporting dishes, a duct (100) including a duct body (110) positioned above the bottom portion as a duct through which washing water is provided to move, a duct holder (130) including a duct bearing (120) protruding from the duct body, and a support bearing (133) disposed to face the duct bearing, and a spray rotor (200) rotatably coupled between the duct bearing and the support bearing for spraying washing water to wash the dishes by receiving washing water from the duct bearing, wherein the spray rotor includes a nozzle body (210) rotatably coupled to the duct bearing and provided to receive washing water from the duct bearing, and a base body (220) provided to be rotatably supported by the support bearing.

[0209] According to various embodiments of the present disclosure, the washing performance of a dishwasher can be improved.

[0210] According to various embodiments of the present disclosure, a dishwasher may include a miniaturized spray unit.

[0211] According to various embodiments of the present disclosure, a dishwasher can reduce friction of a bearing.

[0212] 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.

[0213] The above illustrates and describes specific embodiments. However, the invention is not limited to the above-described embodiments, and those skilled in the art will readily appreciate that various modifications and implementations can be made without departing from the spirit and scope of the invention as set forth in the claims below.

Claims

1. Tub; A basket located inside the above tub and designed to store dishes; A spray device comprising a spray rotor, wherein the spray rotor comprises: Nozzle body and, An injection device comprising a base body coupled to the nozzle body such that the base body and the nozzle body form a space together; and As a duct, A duct body through which washing water can flow, A duct bearing to which the nozzle body is rotatably coupled, the duct bearing configured to supply washing water flowing within the duct body from the duct body to the space formed by the base body and the nozzle body; A dishwasher comprising a duct including a duct holder that supports the base body so as to rotatably support the spray rotor together with the duct bearing, and configured to spray washing water supplied to a space formed by the base body and the nozzle body toward the basket by the spray rotor to wash dishes accommodated in the basket.

2. In paragraph 1, A dishwasher, wherein the duct holder includes a support bearing having a section facing the duct bearing and having a cross-sectional area that decreases as it approaches the base body.

3. In paragraph 2, The duct holder includes an extension portion extending from the duct body along the protruding direction of the duct bearing, and a holder portion bent from the extension portion. The above support bearing is a dishwasher at the end of the holder portion.

4. In paragraph 1, A dishwasher in which the spray rotor includes a spray port that sprays washing water within a space formed by the base body and the nozzle body toward the basket to wash dishes accommodated in the basket.

5. In paragraph 4, A dishwasher wherein the above nozzle includes a propelling nozzle on the outer surface of the nozzle rotor.

6. In paragraph 5, A dishwasher further comprising an upper nozzle formed in the nozzle body and configured to spray washing water in a direction different from the direction in which washing water is sprayed by the propelling nozzle.

7. In paragraph 1, A dishwasher including a nozzle body having a flow path having a cross-sectional area corresponding to the cross-sectional area of ​​the flow path of the duct bearing, so as to form a distribution flow path together with the duct bearing.

8. In paragraph 7, A dishwasher in which the duct body includes a curved portion that prevents a decrease in the flow rate of washing water flowing from the duct body to the flow path of the duct bearing.

9. In paragraph 7, A dishwasher in which the nozzle part is arranged so that the cross-sectional area of ​​the flow path of the nozzle part increases as it gets farther away from the duct bearing.

10. In paragraph 9, A dishwasher in which the nozzle part includes a sealing part that surrounds the duct bearing to prevent washing water from flowing out between the nozzle part and the duct bearing.

11. In paragraph 1, A dishwasher wherein the duct holder comprises an elastic material so as to be elastically deformable while the nozzle body is coupled to the duct bearing and the base body is positioned to be supported by the duct holder.

12. In paragraph 1, The above basket includes a bottom portion provided to support the above dishes, A dishwasher in which the above duct body is located above the bottom part.

13. In paragraph 12, The above bottom part, An inclined support provided so that the above-mentioned tableware is supported inclined downward, A dishwasher comprising a duct support member connected to the above-mentioned inclined support member and having the duct body mounted thereon.

14. In paragraph 13, A dishwasher in which the spray rotor is located at the lower side of the duct body to spray washing water onto dishes supported on the inclined support.

15. In paragraph 1, The dishwasher includes a plurality of duct bearings and a plurality of duct holders arranged at predetermined intervals along a direction in which the duct body extends in the longitudinal direction, The dishwasher comprises a plurality of spray rotors, A dishwasher in which the duct holders of the plurality of duct holders, together with the duct bearings of the plurality of duct bearings, support the spray rotors of the plurality of spray rotors, respectively.

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