Tableware washer

Abstract

To provide a tableware washer that easily restrains water leakage.SOLUTION: A tableware washer according to the present disclosure comprises a washing tank in which an opening directed in an upper direction is formed, an injection port for injecting washing water into the washing tank, and a lid part for closing the opening from above. The lid part is provided with a lid side contact part. The washing tank comprises a wall surface part erected upward from a bottom surface part of the washing tank, a tank side contact part for sealing the washing tank and the lid part by coming into contact with the lid side contact part, and a rib part protruding to the inside of the washing tank from an inner surface of the wall surface part.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to dishwashers. [Background technology]

[0002] Patent Document 1 discloses a drawer-type dishwasher having an upwardly opening washing tub, and is equipped with a wiper blade that scrapes water droplets adhering to the lid into the washing tub. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-166850 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides a dishwasher that is easy to suppress water leakage. [Means for solving the problem]

[0005] The dishwasher of the present disclosure comprises a washing tub with an opening facing upward, a nozzle for spraying washing water into the washing tub, and a lid portion for covering the opening from above, the lid portion being provided with a lid side contact portion, and the washing tub having a wall portion that rises upward from the bottom portion of the washing tub, a tub side contact portion that contacts the lid side contact portion and seals the washing tub and the lid portion, and a rib portion that protrudes further inward than the inner surface of the wall portion. [Effects of the Invention]

[0006] In the dishwasher disclosed herein, the ribs can block wash water sprayed from below toward the lid-side contact portion and the tub-side contact portion, thereby preventing wash water from hitting the lid-side contact portion and the tub-side contact portion with too much force, making it easier to prevent water leakage. [Brief explanation of the drawings]

[0007] [Figure 1] Schematic side view of a dishwasher according to a first embodiment. [Figure 2] Schematic side view of a dishwasher with the washing tub pulled out [Figure 3] A perspective view of the cleaning tank from above [Figure 4] Cross-section of the cleaning tank and lid [Figure 5] Enlarged view of Figure 4 [Figure 6] 10 is a cross-sectional view of the vicinity of a rib portion according to a first modified example. [Figure 7] 10 is a cross-sectional view of the vicinity of a rib portion according to a second modified example. DETAILED DESCRIPTION OF THE INVENTION

[0008] (Findings that formed the basis of this disclosure) At the time the inventors arrived at the idea of ​​the present disclosure, there was a technology in the dishwasher technical field that covered an upwardly opening washing tub with a lid from above and sprayed washing water into the washing tub to wash dishes and other items. Furthermore, dishwashers that spray this type of washing water were often designed so that the items were placed face down in the washing tub and the washing water was sprayed primarily from below upward to prevent water from accumulating on the items during washing. In such conventional dishwashers, the spray pressure or spray range of the washing water was limited to prevent the washing water from hitting the seal between the washing tub and the lid with too much force, thereby preventing water leakage outside the washing tub. However, the inventors discovered that if the spray pressure or spray range of the cleaning water is limited, there is a risk that the cleaning power for dishes will be reduced, and that it is preferable to suppress water leakage without limiting the spray of cleaning water.In order to solve this problem, the inventors have come up with the subject matter of the present disclosure. Therefore, the present disclosure provides a dishwasher that is easy to suppress water leakage.

[0009] Hereinafter, embodiments will be described in detail with reference to the drawings. However, unnecessary detailed description may be omitted. For example, detailed description of well-known matters or redundant description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description and to facilitate understanding by those skilled in the art. The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0010] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to the drawings. [1-1.Configuration] [1-1-1. Overall structure] FIG. 1 is a schematic side view of dishwasher 1 according to embodiment 1. FIG. 2 is a schematic side view of dishwasher 1 with washing tub 50 pulled out. Dishwasher 1 is a built-in dishwasher with a drawer that is installed in, for example, a system kitchen, and is equipped with a washing tub 50 that can be pulled out. Hereinafter, the direction in which washing tub 50 is pulled out is defined as the front, and the direction to the left of a person looking at dishwasher 1 from the front is defined as the left direction. In the drawings, X represents the left direction, Y represents the forward direction, and Z represents the upward direction.

[0011] Dishwasher 1 has a housing 10 that is installed inside a system kitchen or the like. Housing 10 is a box-shaped member that is open at the front. The opening of housing 10 is closed from the front by door 11.

[0012] A cleaning tank 50 is housed inside the housing 10. The cleaning tank 50 is a box-shaped structure with an upward opening 51. A cleaning basket 30 is provided inside the cleaning tank 50 for placing items to be cleaned, such as plates and cups. The cleaning tank 50 is connected to a door body 11.

[0013] A first rail 41 extending in the front-rear direction is provided on the outer surface in the left-right direction of the cleaning tank 50. The first rail 41 is supported by a second rail 13 provided on the inner surface of the housing 10, so that the cleaning tank 50 is supported so as to be movable in the front-rear direction relative to the housing 10.

[0014] As shown in Fig. 1, when the cleaning tank 50 moves rearward and is pushed into the housing 10, the door body 11 closes the opening of the housing 10. As shown in Fig. 2, the cleaning tank 50 is pulled forward to the outside of a sink or the like through the opening of the housing 10. When the cleaning tank 50 is pulled forward, the object to be cleaned can be put in and taken out of the cleaning tank 50 through the opening 51.

[0015] When the cleaning tank 50 is housed in the housing 10, the opening 51 of the cleaning tank 50 is closed by the lid 15 provided on the housing 10. A ring-shaped rubber lid contact part 16 is attached to the underside of the lid 15. The lid contact part 16 comes into contact with the periphery of the opening 51 to seal the cleaning tank 50. The lid 15 is attached to the housing 10 via a parallel link mechanism 17 or the like so that it can move up and down relative to the housing 10. The lid 15 moves downward to close the opening 51 when the cleaning tank 50 is housed in the housing 10, and moves upward so as not to interfere with the cleaning tank 50 when the cleaning tank 50 is pulled out.

[0016] A required amount of cleaning water, such as tap water, is supplied to the inside of cleaning tank 50 from a branch water faucet in the system kitchen or the like via a water supply path (not shown) that includes a water supply hose, a water supply pump, a water supply valve, etc. The cleaning water supplied to cleaning tank 50 circulates within cleaning tank 50 via cleaning pump 43 and cleaning nozzle 45.

[0017] The cleaning pump 43 is a pump that sends cleaning water accumulated at the bottom of the cleaning tank 50 to the cleaning nozzle 45. The cleaning pump 43 is provided below the outside of the cleaning tank 50. The cleaning nozzle 45 is provided inside the cleaning tank 50, below the cleaning basket 30, and is located near the center of the cleaning tank 50 in a plan view. The cleaning nozzle 45 has multiple nozzles 46 that spray cleaning water. The nozzles 46 open upward. The cleaning nozzle 45 is configured to be rotatable about an axis in the vertical direction due to the power of a motor or the recoil when the cleaning water is sprayed. The cleaning nozzle 45 rotates while spraying cleaning water upward from the nozzles 46, thereby cleaning the objects placed in the cleaning basket 30. A heater 47 is also provided inside the cleaning tank 50. The heater 47 heats the cleaning water accumulated at the bottom of the cleaning tank 50, thereby facilitating the cleaning of the objects.

[0018] Dishwasher 1 is provided with a drain path (not shown) that drains wash water from washing tub 50. The drain path is made up of a drain pump and a drain hose connected to a kitchen drain pipe or the like. When dishwasher 1 has finished washing and rinsing the items to be washed, the drain pump is driven and the wash water is drained to the outside via the drain hose.

[0019] [1-1-2. Detailed configuration of the cleaning tank] FIG. 3 is a perspective view of the cleaning tank 50 as seen from above. The cleaning tank 50 is a resin member. As shown in FIG. 3, the cleaning tank 50 has a substantially horizontal bottom surface portion 52, a front surface portion 53 rising upward from the front end of the bottom surface portion 52, a rear surface portion 54 rising upward from the rear end of the bottom surface portion 52, and a pair of side surface portions 55 rising upward from both left and right ends of the bottom surface portion 52. The front surface portion 53 and the rear surface portion 54 are substantially perpendicular to the front-to-rear direction and substantially parallel to the left-to-right direction. The pair of left and right side surface portions 55 are each substantially perpendicular to the left-to-right direction and substantially parallel to the left-to-right direction. The front surface portion 53, the rear surface portion 54, and the pair of side surface portions 55 in this embodiment correspond to the "wall surface portions" of the present disclosure.

[0020] In this embodiment, the dimension L of the pair of left and right side surfaces 55 in the front-to-rear direction of the cleaning tank 50 is greater than the dimension W of the front surface 53 and rear surface 54 in the left-to-right direction. That is, the longitudinal direction of the cleaning tank 50 is the front-to-rear direction, and the lateral direction of the cleaning tank 50 is the left-to-right direction. The longitudinal direction of the cleaning tank 50 is parallel to the direction in which the cleaning tank 50 is pulled out and pushed in. Because the cleaning tank 50 has a substantially rectangular box shape, the lateral spacing between the side surfaces 55 is approximately equal to the dimension W, and the lateral spacing between the front surface 53 and rear surface 54 is approximately equal to the dimension L. That is, the lateral spacing between the side surfaces 55 is smaller than the lateral spacing between the front surface 53 and rear surface 54. In this embodiment, the front surface 53 and rear surface 54 correspond to "lateral surfaces." The pair of side surfaces 55 in this embodiment correspond to "longitudinal surfaces."

[0021] FIG. 4 is a cross-sectional view of the cleaning tank 50 and the lid 15, showing the cleaning tank 50 and the lid 15 in a cross section perpendicular to the front-to-rear direction. As shown in FIGS. 3 and 4, tank-side contact portions 53a, 54a, and 55a that contact the lid-side contact portion 16 are provided around the opening 51 in the cleaning tank 50. Each of the tank-side contact portions 53a, 54a, and 55a has an upward-facing surface. The tank-side contact portion 53a is formed on the upper part of the front surface portion 53. The tank-side contact portion 54a is formed on the upper part of the rear surface portion 54. The tank-side contact portions 55a are each formed on the upper part of a pair of side surface portions 55. The tank-side contact portions 53a, 54a, and 55a are connected to each other and surround the opening 51 from the outside over substantially the entire periphery. When the lid portion 15 closes the opening 51, the tank-side contact portions 53a, 54a, 55a come into contact with the lid-side contact portion 16, thereby sealing the cleaning tank 50.

[0022] 3 and 4, of the pair of left and right side surface portions 55, an inner surface 55b facing the interior of the cleaning tank 50 is provided with a rib portion 57 that protrudes toward the inside of the cleaning tank 50. The rib portion 57 is a protrusion that extends in the front-to-rear direction at the upper end of the inner surface 55b and protrudes in the left-to-right direction. In other words, the rib portion 57 is formed near the opening 51 of the cleaning tank 50 so as to extend from the side surface portion 55 along the longitudinal direction of the cleaning tank 50 toward the inside of the cleaning tank 50.

[0023] The rib portion 57 reinforces the side surface portion 55. The side surface portion 55 has a large dimension L in the front-to-rear direction and is prone to deformation and distortion due to heat, etc., but the formation of the rib portion 57 makes it less likely to deform. Therefore, the position of the tank-side contact portion 55a relative to the lid-side contact portion 16 is less likely to shift, making it easier to ensure the sealing of the cleaning tank 50 and to prevent water leakage to the outside of the cleaning tank 50. Even if the side surface portion 55 deforms, the rib portion 57 can block the cleaning water, thereby preventing leakage of cleaning water due to distortion caused by deformation. In particular, in this embodiment, the rib portion 57 is provided in a range including the center of the inner surface 55b in the front-to-rear direction. This effectively prevents deformation and distortion of the side surface portion 55 due to heat, etc., and makes it easier to prevent water leakage.

[0024] On the other hand, as shown in Fig. 3, the inner surfaces 53b, 54b of the front surface 53 and rear surface 54, which have small dimensions in the left-right direction and are therefore less susceptible to deformation and distortion, do not have ribs 57 that protrude toward the inside of the cleaning tank 50. In other words, the ribs 57 are not provided on the front surface 53 and rear surface 54 that are aligned along the short side of the cleaning tank 50.

[0025] FIG. 5 is an enlarged view of FIG. 4, showing the vicinity of the rib portion 57. In the side portion 55, the upper end of the vertically extending inner surface 55b is connected to an inclined surface 55c that slopes upward toward the outside of the cleaning tank 50. The rib portion 57 is formed in the portion formed by the inclined surface 55c and the inner surface 55b, which forms a convex shape toward the inside of the cleaning tank 50. The upper end of the inclined surface 55c is connected to the tank-side contact portion 55a. Specifically, the tank-side contact portion 55a and the inclined surface 55c are each inclined downward toward the inside of the cleaning tank 50, but the tank-side contact portion 55a is approximately horizontal, and the inclined surface 55c has a greater downward inclination than the tank-side contact portion 55a. More specifically, the inclined surface 55c is curved downwardly convexly. Therefore, the inclined surface 55c and the tank-side contact portion 55a form a convex shape toward the inside of the cleaning tank 50. 4 and 5, the rib portion 57 is located below the tank-side contact portion 55a. The rib portion 57 protrudes further into the cleaning tank 50 than the inner surface 55b. The convex surface 57a, which is the upper surface of the rib portion 57, is inclined downward toward the inside of the cleaning tank 50. In this embodiment, the inclined surface 55c and the convex surface 57a are formed flush with each other.

[0026] As shown by the imaginary lines in Figure 5, in this embodiment, the rib portion 57 is positioned to block the cleaning water sprayed from the nozzle 46 toward the tank-side contact portion 55a and the lid-side contact portion 16. The rib portion 57 is formed integrally with the side surface portion 55. In particular, in this embodiment, the rib portion 57 is molded integrally with each part of the cleaning tank 50, such as the side surface portion 55, using an inclined pin or the like. Therefore, no gap is formed between the rib portion 57 and the inner surface 55b of the side surface portion 55, and the cleaning water does not pass between the rib portion 57 and the inner surface 55b.

[0027] In this embodiment, the lid 15 is provided with a lid-side rib 18, which extends along the inner periphery of the lid-side contact portion 16 and protrudes downward. The lid-side rib 18 is located above the convex surface 57a and overlaps the convex surface 57a in a plan view. When the lid 15 closes the opening 51, the lid-side rib 18 is located near the convex surface 57a. Specifically, the lid rib 18 has an inner surface 18a facing the inside of the cleaning tank 50, an outer surface 18b facing the outside of the cleaning tank 50, and a lower surface 18c connecting the lower end of the inner surface 18a to the lower end of the outer surface 18b. In the left-right direction, i.e., the direction generally perpendicular to the inner surface 55b, the inner surface 18a is located closer to the inside of the cleaning tank 50 than the inner surface 55b, and the outer surface 18b is located closer to the outside of the cleaning tank 50 than the inner surface 55b. That is, the lid-side rib 18 is provided across the inside and outside of the cleaning tank 50 relative to the inner surface 55b. Therefore, the lid-side rib 18 is located above the rib portion 57 and the inclined surface 55c. The lid-side rib 18 also extends below the tank-side contact portion 55a. Therefore, the two convex shapes formed by the inner surface 55b, inclined surface 55c, and tank-side contact portion 55a on the cleaning tank 50 side are close to the lid-side rib 18, forming a so-called labyrinth structure. Therefore, the space between the interior space of the cleaning tank 50 and the lid-side contact portion 16 has a complex shape, making it difficult for cleaning water to directly hit the lid-side contact portion 16.

[0028] [1-2. Operation] The operation of the dishwasher 1 configured as above will now be described.

[0029] When washing an object to be washed, the user first pulls the door body 11 forward and pulls out the washing tank 50 to the outside of the housing 10 and the system kitchen (see Figure 2).The user then places the object to be washed in the washing basket 30 in the washing tank 50 through the opening 51.

[0030] As described above, since the ribs 57 are not formed on the inner surfaces 53b, 54b of the front surface 53 and the rear surface 54, the user can easily use the opening 51 widely in the longitudinal direction to place the items to be cleaned in the cleaning basket 30. Furthermore, in this embodiment, the direction in which the ribs 57 extend is parallel to the direction in which the cleaning tank 50 is pulled out. Therefore, when the cleaning tank 50 is pulled out, the front surface 53, on which the ribs 57 are not formed, is located on the side of the cleaning tank 50 closest to the user. Therefore, when the user looks inside the cleaning tank 50 through the opening 51, the ribs 57 and the convex surface 57a only obstruct a small area of ​​the user's view, making it less likely to create a feeling of oppression. Furthermore, in this embodiment, the ribs 57 are located near the upper end of the inner surface 55b of the side surface 55. Therefore, the user can use the ribs 57 as a guide for the maximum height of the items to be cleaned that can be placed inside the cleaning tank 50.

[0031] After placing the items to be cleaned, the user pours detergent or the like into the cleaning tank 50. Next, the user pushes the door 11 backward, causing the door 11 to close the opening of the housing 10. This stores the cleaning tank 50 in the housing 10. At the same time, the lid 15 descends to close the cleaning tank 50 from above. At this time, the lid-side contact portion 16 of the lid 15 comes into contact with the tank-side contact portions 53a, 54a, 55a of the cleaning tank 50, thereby sealing the cleaning tank 50.

[0032] Next, the user operates the dishwasher 1 to start washing. This causes water to be supplied to the washing tub 50 via the water supply path, and after the water is supplied, the washing pump 43 is activated. When the washing pump 43 is activated, the washing water in the washing tub 50 is sent to the washing nozzle 45 and sprayed onto the objects to be washed placed in the washing basket 30 through the spray port 46. As a result, the objects to be washed are washed with the washing water circulating between the washing pump 43, the washing nozzle 45, and the washing tub 50.

[0033] Since the cleaning basket 30 is positioned above the cleaning nozzle 45, the cleaning water is sprayed upward from the spray port 46. Therefore, some of the sprayed cleaning water may hit the inner surfaces 53b, 54b, 55b of the cleaning tank 50, the tank-side contact parts 53a, 54a, 55a, the underside of the lid 15, the lid-side contact part 16, etc. without being blocked by the object to be cleaned.

[0034] In contrast to this, in this embodiment, rib portion 57 is formed at a position that blocks the cleaning water sprayed from nozzle 46 toward tank side contact portion 55a and lid side contact portion 16. Therefore, rib portion 57 makes it easy to prevent the cleaning water sprayed from nozzle 46 from directly hitting tank side contact portion 55a and lid side contact portion 16.

[0035] Furthermore, the rib portion 57 protrudes further toward the inside of the cleaning tank 50 than the inner surface 55b of the side portion 55. Therefore, as shown by the imaginary lines in Figure 5, the flow of cleaning water flowing upward along the inner surface 55b of the side portion 55 is easily bent toward the inside of the cleaning tank 50 by the rib portion 57. This makes it easy to prevent the strong flow of cleaning water from hitting the tank-side contact portion 55a and the lid-side contact portion 16.

[0036] In this embodiment, the cleaning nozzle 45 is located approximately in the center of the cleaning tank 50 in a plan view. The distance between the side portions 55 in the left-right direction is smaller than the distance between the front portion 53 and the rear portion 54 in the front-rear direction. Therefore, the cleaning nozzle 45 is close to the side portions 55, and the cleaning water sprayed from the spray port 46 tends to hit with great force the tank-side contact portion 55a and the inner surface 55b of the side portions 55, and the portion of the lid-side contact portion 16 that contacts the tank-side contact portion 55a. The cleaning nozzle 45 is particularly close to the center of the side portions 55 in the front-rear direction, and the cleaning water tends to hit with particularly great force.

[0037] In contrast, in this embodiment, the rib portion 57 is provided on the inner surface 55b of the side surface 55, where the cleaning water is likely to hit with great force. This makes it easy to effectively prevent the cleaning water from hitting the tub side contact portion 55a and the lid side contact portion 16 with great force. Furthermore, the rib portion 57 and the convex surface 57a are provided in a range that includes the center in the front-to-rear direction of the inner surface 55b of the side surface 55. This makes it easy to effectively prevent the cleaning water from hitting the tub side contact portion 55a and the lid side contact portion 16 with particularly great force. Furthermore, in this embodiment, the convex surface 57a is inclined downward toward the inside of the cleaning tub 50, so that when cleaning water splashes on the convex surface 57a, the cleaning water is likely to return to the cleaning tub 50 along the inclination.

[0038] 5, in this embodiment, cleaning water flowing directly from the cleaning nozzle 45 or along the underside of the lid 15 toward the tank-side contact portions 53a, 54a, 55a and the lid-side contact portion 16 is easily blocked by the lid-side ribs 18 formed on the lid 15. Furthermore, since the inner surface 18a of the lid-side rib 18 is located more inwardly than the inner surface 55b of the side surface portion 55, cleaning water blocked by the lid-side ribs 18 is easily returned to the inside of the cleaning tank 50. Furthermore, in this embodiment, the lid-side ribs 18, the inner surface 55b, the inclined surface 55c, and the tank-side contact portion 55a form a labyrinth structure, so that cleaning water is less likely to directly hit the lid-side contact portion 16.

[0039] After operating the wash pump 43 for a predetermined period of time, the dishwasher 1 drains the wash water in the wash tub 50 through the drainage path. In this way, the dishwasher 1 completes the washing process of the items to be washed by repeatedly supplying water to the wash tub 50, washing by driving the wash pump 43, and draining the water from the wash tub 50. Thereafter, the dishwasher 1 performs a drying process for the items to be washed, and then ends operation.

[0040] After the dishwasher 1 has finished operating, the user reopens the door 11 and removes the washed and dried items from the washing tub 50. As described above, the ribs 57 and the convex surfaces 57a are not formed on the inner surfaces 53b, 54b of the front surface 53 and the rear surface 54, so the user can easily remove the items from the washing tub 50 by using the opening 51 widely in the longitudinal direction.

[0041] [1-3. Effects, etc.] As described above, in this embodiment, the dishwasher 1 comprises a washing tub 50 having an opening 51 facing upward, an injection port 46 for injecting washing water into the washing tub 50, and a lid portion 15 for covering the opening 51 from above, and the lid portion 15 is provided with a lid side contact portion 16. The washing tub 50 has a front portion 53, a rear portion 54, and a side portion 55 which are raised upward from the bottom portion 52 of the washing tub 50, tub side contact portions 53a, 54a, 55a which contact the lid side contact portion 16 and seal the washing tub 50 and the lid portion 15, and a rib portion 57 which protrudes further inward from the washing tub 50 than the inner surface 55b of the side portion 55. This makes it easier for the ribs 57 to block wash water heading toward the lid-side contact portion 16 and the tub-side contact portion 55a. This prevents wash water from hitting the lid-side contact portion 16 and the tub-side contact portion 55a with great force, making it easier to prevent water leakage to the outside of the wash tub 50. Furthermore, because the ribs 57 can prevent water leakage from between the lid-side contact portion 16 and the tub-side contact portion 55a, restrictions on the spray pressure and spray range of the sprayed wash water can be relaxed. This makes it easier to design the dishwasher so that wash water is sprayed over a wide area with high spray pressure, making it easier to improve the cleaning power of the dishwasher 1. In particular, in this embodiment, a lid-side rib 18 that protrudes downward along the inner periphery of the lid-side contact portion 16 is formed on the underside of the lid portion 15. Therefore, the lid-side rib 18 can block cleaning water that flows along the underside of the lid portion 15 toward the lid-side contact portion 16 and the tank-side contact portion 55a, making it easier to further suppress water leakage to the outside of the cleaning tank 50.

[0042] As in this embodiment, the rib portion 57 may be configured to be formed integrally with the inner surface 55b of the side surface portion 55. This prevents a gap from being formed between the rib portion 57 and the inner surface 55b, making it easier to block the washing water with high reliability. This makes it easier to prevent water from leaking outside the washing tank 50. In particular, in this embodiment, the rib portion 57 is molded integrally with the inner surface 55b of the side surface portion 55. Therefore, it is particularly difficult for a gap to be formed between the rib portion 57 and the inner surface 55b.

[0043] As in this embodiment, the rib portion 57 may be formed at a position lower than the tank side contact portion 55a. As a result, even if cleaning water splashes on the rib portion 57, the cleaning water is less likely to reach the tank side contact portion 55a along the rib portion 57. This makes it easier to prevent water from leaking outside the cleaning tank 50.

[0044] As in this embodiment, the convex surface 57a, which is the upper surface of the rib portion 57, may be configured to be inclined downward toward the inside of the cleaning tank 50. As a result, when wash water splashes onto convex surface 57a, if convex surface 57a is formed horizontally, the water tends to remain on convex surface 57a. However, by inclining convex surface 57a, the wash water tends to return to the inside of the wash tub along the slope of convex surface 57a. This prevents wash water from accumulating on convex surface 57a. Furthermore, when dishwasher 1 performs a drying process to dry the items to be washed, convex surface 57a tends to dry.

[0045] As in this embodiment, the rib portion 57 may be configured to extend from the side portion 55, which is along the longitudinal direction of the cleaning tank 50, among the front portion 53, rear portion 54, and side portion 55, near the opening 51 of the cleaning tank 50 toward the inside of the cleaning tank 50. As a result, the rib portions 57 can easily suppress deformation and bending of the side portions along the longitudinal direction, which are difficult to ensure strength of the cleaning tank 50. This makes it easier to ensure the airtightness of the cleaning tank 50 and to suppress water leakage to the outside of the cleaning tank 50. In particular, when the cleaning nozzle 45 is provided near the center of the cleaning tank 50 in a plan view, as in this embodiment, cleaning water is likely to reach the side surface portion 55 along the longitudinal direction of the cleaning tank 50 with a strong force. Furthermore, the center of the side surface portion 55 in the longitudinal direction is close to the cleaning nozzle 45 in the lateral direction, and therefore cleaning water is likely to reach the center. For this reason, by providing the rib portion 57 in a range including the center of the side surface portion 55 in the longitudinal direction, as in this embodiment, cleaning water can be effectively blocked at positions where the cleaning water is likely to reach the lid-side contact portion 16 and the tank-side contact portion 55a with a particularly strong force.

[0046] As in this embodiment, the rib portion 57 may not be provided on the front surface portion 53 and the rear surface portion 54, which are along the short direction of the cleaning tank, among the front surface portion 53, the rear surface portion 54, and the side surface portion 55. As a result, compared to when ribs 57 are provided on both the front surface 53 and the rear surface 54, the opening 51 can be used more widely in the longitudinal direction of the cleaning tank 50, making it easier to put large objects to be cleaned, such as cutting boards, into and take them out of the cleaning tank 50. Therefore, the ribs 57 can more easily prevent the user from feeling oppressive.

[0047] As in this embodiment, the lid portion 15 may be configured to have a lid side rib 18 that protrudes downward along the inner side of the lid side contact portion 16, and the inner surface portion 18a of the lid side rib 18 may be positioned more inside the cleaning tank 50 than the inner surface 55b of the side portion 55. This makes it easier for the cleaning water that hits the lid-side ribs 18 to return to the inside of the cleaning tank 50. Therefore, water leakage to the outside of the cleaning tank 50 can be suppressed.

[0048] (Other embodiments) As described above, the first embodiment has been described as an example of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made. Furthermore, it is also possible to combine the components described in the first embodiment above to create new embodiments. Therefore, other embodiments will be exemplified below.

[0049] In the first embodiment, a built-in, drawer-type dishwasher has been described as an example of a dishwasher. A dishwasher may have a washing tank that opens upward and washes items by spraying washing water. Therefore, dishwasher 1 is not limited to a built-in, drawer-type dishwasher. However, in the case of a built-in dishwasher, it is more difficult for the user to deal with a water leak than in a countertop dishwasher, so the effect of preventing water leaks is particularly significant.

[0050] In the first embodiment, it has been described that the lid-side contact portion 16 provided on the lid portion 15 is a rubber member and attached to the lid portion 15. Also, it has been described that the tank-side contact portions 53a, 54a, and 55a are upward-facing surfaces formed on the upper portions of the front portion 53, rear portion 54, and side portion 55 of the cleaning tank 50, but this is just one example. The lid-side contact portion 16 and the tank-side contact portions 53a, 54a, and 55a may be configured to contact each other and seal the lid portion 15 and the cleaning tank 50. Therefore, for example, the lid-side contact portion 16 may be a surface or protrusion formed downward on the lid portion 15, and the tank-side contact portions 53a, 54a, and 55a may be rubber members attached to the upper portions of the front portion 53, rear portion 54, and side portion 55. That is, the configuration of the lid side contact portion 16 and the tank side contact portions 53a, 54a, 55a may be interchanged between the lid portion 15 and the cleaning tank 50, or may be any configuration that seals the lid portion 15 and the cleaning tank 50.

[0051] In the first embodiment, the rib portions 57 are described as being provided only on the side surface portions 55 parallel to the longitudinal direction and the pull-out direction of the cleaning tank 50, but this is just one example. For example, the rib portions 57 may be provided on the front surface portion 53 and the rear surface portion 54, but not on the side surface portions 55. The rib portions 57 may also be provided on the front surface portion 53, the rear surface portion 54, and the side surface portions 55, and may be formed in a ring shape in a plan view. However, when the rib portions 57 are provided only on the side surface portions 55 parallel to the longitudinal direction of the cleaning tank 50, deformation of the cleaning tank 50 can be effectively suppressed, and water leakage from the cleaning tank 50 can be easily suppressed, while preventing the rib portions 57 from giving a feeling of pressure to the user.

[0052] In the first embodiment, the rib portion 57 is molded integrally with the inner surface 55b and other components of the cleaning tank 50. However, this is merely an example. The rib portion 57 may be seamlessly formed integrally with the inner surface 55b and other components of the cleaning tank 50 by a method other than molding. For example, the rib portion 57 may be formed integrally with the components of the cleaning tank 50 by tracing or extending the upper portion of the inner surface 55b toward the inside of the cleaning tank 50. Even when the components of the cleaning tank 50 and the rib portion 57 are integrally formed by a method other than molding, no gaps are formed between the rib portion 57 and the inner surface 55b, which makes it easier to prevent water leakage. Alternatively, the rib portion 57 may be formed as a separate member from the side surface 55 and other components of the cleaning tank 50 and then fixed to the inner surface 55b by welding or other methods. When the rib portion 57 is formed integrally with each part of the cleaning tank 50 by molding or the like, the rib portion 57 is likely to cause undercuts, so by making the rib portion 57 a separate part, the cleaning tank 50 becomes easier to manufacture.

[0053] In the first embodiment, it has been described that the rib portion 57 is provided at a position lower than the tank side contact portion 55a, but this is just one example. Fig. 6 is a cross-sectional view of the vicinity of the rib portion 157 according to a first modified example, and shows a cross-section corresponding to Fig. 5. Unlike the first modified example, the rib portion 157 does not have to be provided at a position lower than the tank side contact portion 55a.

[0054] In the first modified example, the rib portion 157 is located on an extension of the tank-side contact portion 55a toward the center of the cleaning tank 50 in the left-right direction, and is located at approximately the same height as the tank-side contact portion 55a. Specifically, the rib portion 157 of the first modified example has a convex surface 157a, which is the top surface of the tip end, i.e., the top surface toward the center of the cleaning tank 50 in the left-right direction, and a horizontal surface portion 157b, which is the top surface outside the convex surface 157a. In the rib portion 157, the horizontal surface portion 157b is connected to the tank-side contact portion 55a in a substantially flush manner. Furthermore, when the lid portion 15 is closed, the lower surface portion 18c of the lid-side rib 18 is in contact with the horizontal surface portion 157b. This prevents cleaning water from reaching the lid-side contact portion 16 and the tank-side contact portion 55a. In addition, the convex surface 157a that extends further inside the cleaning tank 50 in the left-right direction than the inner surface portion 18a of the lid side rib 18 is inclined downward toward the inside, so that even if cleaning water splashes on the convex surface 157a, it is easy to return it to the inside of the cleaning tank 50.

[0055] FIG. 7 is a cross-sectional view of a rib portion 257 according to a second modified example, showing a cross section corresponding to FIGS. 5 and 6. As in the second modified example, the rib portion 257 may be configured to be provided at a position higher than the tank side contact portion 55a. In detail, in the second modified example, the convex surface 257a, which is the upper surface of the rib portion 257, and the tank side contact portion 55a are connected via an inclined surface 255c, which is a surface that inclines upward toward the inside of the cleaning tank 50 in the left-right direction. The convex surface 257a is approximately horizontal and is formed at a position higher than the tank side contact portion 55a.

[0056] In Modification 2, as shown in FIG. 7, the convex surface 257a and the underside 18c of the lid-side rib 18 are in substantial contact with each other. This prevents cleaning water from reaching the lid-side contact portion 16 and the tub-side contact portion 55a, thereby helping to prevent water leakage. Furthermore, the rib portion 257 extends further inward into the cleaning tub 50 than the front surface 18a of the lid-side rib 18 in the left-right direction. This allows cleaning water to be more reliably prevented from entering between the convex surface 257a and the underside 18c, even if a gap is formed between the convex surface 257a and the underside 18c due to thermal deformation or the like, thanks to the rib portion 257, even if a gap is formed between the convex surface 257a and the underside 18c, helping to prevent water leakage. Furthermore, the underside 257b at the tip end of the rib portion 257 in Modification 2 is inclined upward toward the inside of the cleaning tub 50 in the left-right direction. Therefore, when wash water sprayed from below hits lower surface 257b, the wash water is guided in a direction away from the contact area between convex surface 257a and lower surface portion 18c, making it difficult for wash water to enter between convex surface 257a and lower surface portion 18c, making it easier to prevent water leakage.

[0057] It should be noted that the above-described embodiments are intended to illustrate the technology of the present disclosure, and various modifications, substitutions, additions, omissions, etc. may be made within the scope of the claims or their equivalents.

[0058] (Addendum) The above description of the embodiments discloses the following techniques. (Technology 1) A dishwasher comprising a washing tub with an opening facing upward, an injection port for injecting washing water into the washing tub, and a lid portion for covering the opening from above, wherein the lid portion is provided with a lid side contact portion, and the washing tub has a wall portion that rises upward from the bottom portion of the washing tub, a tub side contact portion that contacts the lid side contact portion and seals the washing tub and the lid portion, and a rib portion that protrudes further inward into the washing tub than the inner surface of the wall portion. This makes it easier for the ribs to block flush water heading toward the lid-side contact portion and the tub-side contact portion, preventing flush water from hitting the lid-side contact portion and the tub-side contact portion with too much force, making it easier to prevent water leakage.

[0059] (Technology 2) The dishwasher according to Technology 1, wherein the rib portion is formed integrally with the inner surface of the wall portion. This prevents gaps from forming between the rib portion and the inner surface of the wall portion, allowing the rib portion to block flushing water with high reliability, making it easier to prevent water leakage.

[0060] (Technical Aspect 3) The dishwasher according to Technical Aspect 1 or 2, wherein the rib portion is provided below the tub side contact portion. This makes it difficult for cleaning water to reach the tank-side contact portion along the rib portion even if the cleaning water gets on the rib portion, which makes it easier to prevent water from leaking outside the cleaning tank.

[0061] (Technology 4) A dishwasher according to any one of technologies 1 to 3, wherein the upper surface of the rib portion is inclined downward toward the inside of the washing tub. This allows the cleaning water to be easily returned to the inside of the cleaning tank along the slope when it splashes onto the upper surface of the rib portion, thereby preventing the cleaning water from accumulating on the upper surface of the rib portion.

[0062] (Technology 5) A dishwasher described in any one of Technologies 1 to 4, wherein the rib portion is arranged near the opening of the washing tank so as to extend from a longitudinal surface portion of the wall portion that is aligned with the longitudinal direction of the washing tank toward the inside of the washing tank. The rib portion makes it easier to suppress deformation and bending of the longitudinal surface portion along the longitudinal direction, which is a difficult area to ensure strength of the cleaning tank, making it easier to ensure the sealing of the cleaning tank and to suppress water leakage to the outside of the cleaning tank.

[0063] (Technical 6) A dishwasher according to any one of Technical 1 to Technical 5, wherein the rib portion is not provided on a short side portion of the wall portion that is aligned along the short direction of the washing tub. This allows the opening to be used more widely in the longitudinal direction of the washing tank than when ribs are provided on the shorter sides, making it easier to put large objects into and take them out of the washing tank. This also helps to prevent the ribs from giving the user a feeling of oppression.

[0064] (Technology 7) A dishwasher described in any one of Technologies 1 to 6, wherein the lid portion has a lid side rib that protrudes downward along the inner side of the lid side contact portion, and the inner surface of the lid side rib is located inside the washing tank more than the inner surface of the wall portion. This makes it easier for the cleaning water that hits the lid-side rib to return to the inside of the cleaning tank, thereby preventing water from leaking outside the cleaning tank. [Industrial Applicability]

[0065] The present disclosure is applicable to dishwashers, particularly to household and commercial dishwashers. [Explanation of symbols]

[0066] 1 dishwasher 10. Cabinet 11 Door body 13 The Second Rail 15 Lid 16 Lid side contact part 17 Parallel link mechanism 18 Lid side rib 18a Inner surface 18b External part 18c Bottom part 30 Washing basket 41 First Rail 43 Cleaning pump 45 Cleaning nozzle 46 Nozzle 47 Heater 50 Cleaning tank 51 Aperture 52 Bottom part 53 Front part (wall part, short side part) 53a Tank side contact part 53b Inside 54 Rear part (wall part, short side part) 54a Tank side contact part 54b Inside 55 Side part (wall part, longitudinal part) 55a Tank side contact part 55b Inside 55c slope 57 Rib section 57a Convex surface (upper surface of rib) 157 Rib section 157a Convex surface (upper surface of rib) 157b Horizontal part 255c slope 257 Rib section 257a Convex 257b Bottom surface

Claims

1. a cleaning tank having an upward opening; an injection port for injecting cleaning water into the cleaning tank; a lid portion that closes the opening from above, The lid portion is provided with a lid-side contact portion, The cleaning tank comprises: a wall portion extending upward from the bottom surface of the cleaning tank; a tank-side contact portion that contacts the lid-side contact portion and seals the cleaning tank and the lid portion; a rib portion protruding further inward than the inner surface of the wall portion toward the inside of the cleaning tank, dishwasher.

2. The rib portion is formed integrally with the inner surface of the wall portion.

2. The dishwasher of claim 1.

3. The rib portion is provided below the tank side contact portion.

2. The dishwasher of claim 1.

4. The upper surface of the rib portion is inclined downward toward the inside of the cleaning tank.

2. The dishwasher of claim 1.

5. The rib portion is provided in the vicinity of the opening of the cleaning tank so as to extend from a longitudinal surface portion of the wall portion along the longitudinal direction of the cleaning tank toward an inside of the cleaning tank.

2. The dishwasher of claim 1.

6. The rib portion is not provided on a short side portion of the wall portion along a short direction of the cleaning tank.

6. The dishwasher of claim 5.

7. The lid portion has a lid-side rib that protrudes downward along an inner periphery of the lid-side contact portion, an inner surface portion of the lid-side rib is located more inwardly than an inner surface of the wall portion of the cleaning tank; 2. The dishwasher of claim 1.

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