dishwasher

Abstract

To provide a dishwasher capable of well suppressing invasion of water to a seal part of a washing tank as compared to a conventional product.SOLUTION: A dishwasher includes a washing tank 100 inside of which dishes are washed. The washing tank 100 includes a bottom part member 110 constituting a bottom part, a side part member 120 constituting a side face, a seal part 130 for sealing a part between an upper end part of the bottom part member 110 and a lower end part of the side part member 120, a first rib 141 extending upward from the upper end part of the bottom part member 110, which is disposed closer to an inner side of the washing tank 100 than the seal part 130 with a space from the seal part 130, and a second rib 142 extending downward from the lower end part of the side part member, which is disposed between the seal part 130 and the first rib 141. A trap structure is composed of the first rib 141, the second rib 142, and the seal part 130.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present disclosure relates to a dishwasher that suppresses deterioration of the sealing performance of a sealing portion of a washing tub. [Background technology]

[0002] A dishwasher is provided with a washing tank in which dishes are washed. A conventional washing tank is known to be divided into a bottom member that constitutes the bottom of the washing tank and a side member that constitutes the side of the washing tank. A washing tank divided in this manner is provided with a sealing portion that seals between the upper end of the bottom member and the lower end of the side member. Here, if water penetrates into the sealing portion, the sealing performance of the sealing portion is reduced. For this reason, a conventional dishwasher provided with a washing tank divided into a bottom member and a side member has been proposed that aims to suppress the penetration of water into the sealing portion (see Patent Document 1).

[0003] Specifically, a conventional dishwasher that aims to prevent water from entering the sealing portion is provided with a shielding rib that is positioned closer to the inside of the washing tank than the sealing portion. Also, a conventional dishwasher that aims to prevent the sealing performance of the sealing portion from deteriorating has a recovery space formed between the sealing portion and the shielding rib to prevent water from rising by capillary action and reaching the sealing portion. Conventional dishwashers that aim to prevent water from entering the sealing portion have such a configuration to prevent water from entering the sealing portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 5141697 Summary of the Invention [Problem to be solved by the invention]

[0005] In a conventional dishwasher that is designed to prevent water from entering the sealing portion, the water accumulated in the recovery space cannot be discharged due to the capillary phenomenon that occurs near the tip of the shielding rib. For this reason, in a conventional dishwasher that is designed to prevent the sealing performance of the sealing portion from deteriorating, for example, when the washing tank is subjected to vibration or impact by a user, water enters the recovery space and the amount of water in the recovery space increases. In a conventional dishwasher that is designed to prevent the sealing performance of the sealing portion from deteriorating, for example, water enters the recovery space due to vibration generated when washing dishes or an increase in internal pressure due to a temperature change in the washing tank, and the amount of water in the recovery space increases. In a conventional dishwasher that is designed to prevent the sealing performance of the sealing portion from deteriorating, as the amount of water in the recovery space increases, the water in the recovery space eventually enters the sealing portion. In this way, a conventional dishwasher that is designed to prevent water from entering the sealing portion has a problem that it is still not possible to sufficiently prevent water from entering the sealing portion.

[0006] The present disclosure is intended to solve the above-mentioned problems, and aims to provide a dishwasher that can prevent water from entering the sealing portion of the washing tub more effectively than conventional dishwashers. [Means for solving the problem]

[0007] The dishwasher according to the present disclosure includes a washing tub in which dishes are washed, the washing tub including a bottom member constituting a bottom, side members constituting sides, a seal portion that seals between an upper end of the bottom member and a lower end of the side member, a first rib that extends upward from the upper end of the bottom member and is positioned closer to the inside of the washing tub than the seal portion and spaced apart from the seal portion, and a second rib that extends downward from the lower end of the side member and is positioned between the seal portion and the first rib, the sealing portion includes an inner peripheral rib that is spaced apart from the first rib and is disposed on an outer side of the cleaning tank relative to the first rib and the second rib, and that forms a groove between the inner peripheral rib and the first rib; The first rib, the second rib, and the Inner rib By Water is stored in the groove between the first rib and the inner peripheral rib. A trap structure is constructed. Effect of the Invention

[0008] In the dishwasher according to the present disclosure, when water accumulates in the trap structure, a sealed space is formed between the water storage portion of the trap structure and the seal portion. Therefore, in the dishwasher according to the present disclosure, the water level in the trap structure does not increase after the sealed space is formed. Therefore, the dishwasher according to the present disclosure can suppress the intrusion of water into the seal portion of the washing tub more than in the past. [Brief description of the drawings]

[0009] [Figure 1] 1 is a vertical cross-sectional view of a dishwasher according to an embodiment of the present invention, as viewed from the right side. [Diagram 2] 1 is a front view of a dishwasher according to an embodiment of the present invention. [Diagram 3] 1 is a perspective view of the configuration around a washing tub in a dishwasher according to an embodiment of the present invention, seen from the front right side. [Figure 4] 1 is an exploded perspective view of a washing tub of a dishwasher according to an embodiment of the present invention, seen from the front right side. [Diagram 5] 1 is an exploded perspective view of a washing tub of a dishwasher according to an embodiment of the present invention, taken along a vertical cross section parallel to the left-right direction, and viewed from the front right side of the washing tub. FIG. [Figure 6] 2 is a cross-sectional view of a main portion showing the periphery of a seal portion of a washing tub of a dishwasher according to the present embodiment. FIG. [Figure 7] 2 is a cross-sectional view of a main portion showing the periphery of a seal portion of a washing tub of a dishwasher according to the present embodiment. FIG. [Figure 8] 1 is a cross-sectional view of a main portion showing the periphery of a seal portion of a washing tub of a dishwasher according to the present embodiment, showing a state in which water is pooled in a trap structure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In the following embodiment, an example of a dishwasher according to the present disclosure will be described. The dishwasher according to the present disclosure is not limited to the configuration described in the following embodiment. In addition, in the drawings shown in the following embodiment, the relationship between the sizes of the components may differ from the dishwasher according to the present disclosure that is actually manufactured. In addition, in the following embodiment, terms indicating directions are appropriately used to facilitate understanding of the example of the dishwasher according to the present disclosure. However, the directions shown in the following embodiment are used to explain the example of the dishwasher according to the present disclosure. The directions shown in the following embodiment do not limit the dishwasher according to the present disclosure. In addition, the terms indicating directions are, for example, "up", "down", "left", "right", "front" and "rear".

[0011] Embodiment 1 is a vertical cross-sectional view of a dishwasher according to the present embodiment as viewed from the right side, that is, the left side of the paper in FIG. Dishwasher 1 is provided with washing tub 100 in which dishes 200 are washed. In this embodiment, dishwasher 1 is provided with dish basket 50 in which dishes 200 are placed. The dishes 200 placed in the dish basket 50 are then stored in washing tub 100. In this embodiment, washing tub 100 has a substantially box-like shape, and at least a part of the bottom surface is provided with recess 101 recessed vertically downward.

[0012] The dishwasher 1 according to this embodiment also includes an outer shell 2 that houses the washing tub 100. In this embodiment, the outer shell 2 is, for example, box-shaped, and has an opening 2a formed on its side. More specifically, the outer shell 2 has a front side, a back side, a left side side, and a right side side. In this embodiment, the outer shell 2 has an opening 2a formed on its front side. The washing tub 100 is housed in the outer shell 2 so as to be freely inserted and removed through the opening 2a.

[0013] Specifically, a fixed rail 22 is attached to the outer shell 2. A movable rail (not shown) is attached to the cleaning tank 100 so as to be movable on the fixed rail 22. This allows the cleaning tank 100 to be freely inserted and removed from the opening 2a. In this embodiment, a holding mechanism 21 is provided in the outer shell 2 to hold the cleaning tank 100 inside the outer shell 2 so that the cleaning tank 100 does not move outside the opening 2a unless necessary. Specifically, when the cleaning tank 100 is pushed inward toward the inside of the outer shell 2 to a predetermined holding position, the holding mechanism 21 holds the cleaning tank 100 at the predetermined position. At this time, the holding mechanism 21 is biased by a spring (not shown) so that the cleaning tank 100 does not move outside the opening 2a. This allows the cleaning tank 100 to be held at a predetermined position inside the outer shell 2 by the holding mechanism 21.

[0014] The dishwasher 1 according to the present embodiment also includes a door 3 and a lid 4. The door 3 is provided in front of the washing tank 100 and is attached to the washing tank 100. That is, the door 3 moves together with the washing tank 100. When the washing tank 100 is housed in the outer shell 2, the door 3 closes the opening 2a of the outer shell 2. The lid 4 opens and closes the opening 102 of the washing tank 100. More specifically, the washing tank 100 according to the present embodiment has an opening 102 formed on its upper surface, and is configured so that tableware 200 can be housed in the washing tank 100 from above the washing tank 100. When the washing tank 100 is housed in the outer shell 2, the lid 4 closes the opening 102 formed on the upper surface of the washing tank 100.

[0015] Specifically, one end of a link mechanism (not shown) is attached to the lid 4. The other end of the link mechanism is attached to the inside of the upper surface of the outer shell 2. This link mechanism allows the lid 4 to be lifted when the cleaning tank 100 is pulled out from the outer shell 2, thereby opening the opening 102 of the cleaning tank 100. This link mechanism also prevents the lid 4 from being pulled out from the outer shell 2 together with the cleaning tank 100 when the cleaning tank 100 is pulled out from the outer shell 2. On the other hand, when the cleaning tank 100 is housed inside the outer shell 2, the link mechanism causes the lid 4 to be lowered, thereby closing the opening 102 of the cleaning tank 100.

[0016] In addition, the dishwasher 1 in this embodiment is equipped with a water supply valve 15, a water level detection device 16, a water temperature detection device 17, a water heater 18, a pressure pump 19, a drain pump 20, a drying heater 23, a drying blower 24, and a control device 14.

[0017] The water supply valve 15 is provided inside the outer shell 2 and outside the washing tub 100. The water supply valve 15 supplies water into the washing tub 100. In this embodiment, when washing the tableware 200 in the dishwasher 1, a washing process and a rinsing process following the washing process are performed. In the washing process for washing the tableware 200, the water supply valve 15 supplies washing water, which is tap water containing detergent, into the washing tub 100. Also, in the rinsing process for rinsing the tableware 200, the water supply valve 15 supplies tap water into the washing tub 100 as rinsing water.

[0018] The water level detection device 16 detects the level of water accumulated in the cleaning tank 100. In this embodiment, the water level detection device 16 is provided on the side of the recess 101 of the cleaning tank 100. The water temperature detection device 17 detects the temperature of the water in the cleaning tank 100. In this embodiment, the water temperature detection device 17 is provided on the bottom of the recess 101 of the cleaning tank 100. The water boiling heater 18 heats the water in the cleaning tank 100. In this embodiment, the water boiling heater 18 is provided in the recess 101 of the cleaning tank 100, and heats the water accumulated in the recess 101.

[0019] The pressure pump 19 is provided inside the outer shell 2 and outside the washing tank 100. The pressure pump 19 is connected to the recess 101 of the washing tank 100 by the pipe 19a. The pressure pump 19 sends the water stored in the recess 101 to the washing nozzle 40 provided in the washing tank 100 through the shaft 30. As a result, the water sent to the washing nozzle 40 is sprayed toward the tableware 200 from the nozzle of the washing nozzle 40. Specifically, during the washing process of the tableware 200, the pressure pump 19 sends the washing water stored in the recess 101 to the washing nozzle 40. As a result, the washing water is sprayed toward the tableware 200 from the nozzle of the washing nozzle 40, and the tableware 200 is washed. Also, during the rinsing process of the tableware 200, the pressure pump 19 sends the rinsing water stored in the recess 101 to the washing nozzle 40. As a result, the rinsing water is sprayed from the nozzle of the washing nozzle 40 toward the tableware 200, rinsing the tableware 200. The detailed configuration of the washing nozzle 40 will be described later.

[0020] Drain pump 20 is provided inside outer shell 2 and outside washing tank 100. Drain pump 20 is connected to recess 101 of washing tank 100 by drain piping 20a. Drain pump 20 discharges water accumulated in recess 101 to the outside of dishwasher 1.

[0021] The drying heater 23 heats the air to be supplied to the cleaning tank 100. The drying blower 24 supplies the air heated by the drying heater 23 to the cleaning tank 100. In this embodiment, the drying heater 23 and the drying blower 24 are provided inside the outer shell 2 and outside the cleaning tank 100. Specifically, the drying heater 23 and the drying blower 24 are provided behind the cleaning tank 100.

[0022] The control device 14 controls the operation of the dishwasher 1. In this embodiment, the control device 14 is provided in the space between the rear surface of the door 3 and the front surface of the washing tub 100. The control device 14 is composed of dedicated hardware or a CPU (Central Processing Unit) that executes a program stored in a memory. The CPU is also called a central processing unit, processing device, arithmetic unit, microprocessor, microcomputer, or processor.

[0023] FIG. 2 is a front view of the dishwasher according to the present embodiment. As described above, the door 3 freely closes the opening 2a formed in the front surface of the outer shell 2. That is, the door 3 is disposed in front of the dishwasher 1. The door 3 is provided with an operation panel 10 on its upper portion.

[0024] The operation panel 10 has an operation unit 11 on the right side. The operation unit 11 receives operation instructions input from a user and outputs corresponding operation signals to the control device 14. In this embodiment, the operation unit 11 has a power switch 12 for turning on the dishwasher 1 and an operation switch 13 for starting or pausing the operation of the dishwasher 1. The operation panel 10 also has a handle 6 at approximately the center in the left-right direction. The handle 6 is where the user places their hand when pulling out the washing tub 100 to the front side. The operation panel 10 also has an exhaust port 3a on the left side for discharging air from the washing tub 100 to the outside of the dishwasher 1.

[0025] Fig. 3 is a perspective view of the washing tub and its surroundings in the dishwasher according to the present embodiment, seen from the front right side, with a portion of the washing tub shown in cross section. A cleaning nozzle 40 is provided inside the cleaning tank 100. More specifically, the cleaning nozzle 40 is provided in the cleaning tank 100 near the bottom surface of the cleaning tank 100. The cleaning nozzle 40 is detachably attached to the shaft portion 30 provided in the center of the bottom surface of the cleaning tank 100 so as to cover the shaft portion 30 from above. The cleaning nozzle 40 is also rotatably supported by the shaft portion 30.

[0026] The cleaning nozzle 40 according to this embodiment includes an upper nozzle 41 and a lower nozzle 42. The upper nozzle 41 is provided at a position overlapping with the shaft portion 30 in a plan view, i.e., at a position that is the center of rotation of the cleaning nozzle 40, and protrudes upward. An injection port 41a is formed at the top of the upper nozzle 41. The lower nozzle 42 extends horizontally from the position that is the center of rotation of the cleaning nozzle 40. A plurality of injection ports 42a are formed at intervals on the upper surface of the lower nozzle 42.

[0027] Next, a detailed configuration of the cleaning tank 100 according to this embodiment will be described.

[0028] FIG. 4 is an exploded perspective view of the washing tub of the dishwasher according to the present embodiment, as viewed from the front right side. The cleaning tank 100 includes a bottom member 110 constituting the bottom and a side member 120 constituting the side surface. As described later with reference to Figs. 5 to 7, the cleaning tank 100 includes a seal portion 130 that seals between an upper end portion 111 of the bottom member 110 and a lower end portion 121 of the side member 120. The bottom member 110 is formed in a bottomed tray shape. Therefore, the upper end portion 111 of the bottom member 110 is formed on the entire outer periphery of the bottom member 110, and has a picture frame shape. The side member 120 has the above-mentioned opening 102 formed on the upper surface, and is formed in a square tube shape. Therefore, the lower end portion 121 of the side member 120 is formed on the entire outer periphery of the side member 120. Therefore, the seal portion 130 seals the entire periphery between the bottom member 110 and the side member 120. In other words, in this embodiment, the seal portion 130 ensures watertightness around the entire periphery between the bottom member 110 and the side member 120. The bottom member 110 and the side member 120 are made of a thermoplastic resin such as polypropylene. However, the material of the bottom member 110 and the side member 120 is not particularly limited, and the bottom member 110 and the side member 120 may be made of a material other than a thermoplastic resin.

[0029] Fig. 5 is an exploded perspective view of the washing tank of the dishwasher according to this embodiment, cut along a vertical section parallel to the left-right direction, and viewed from the front right side. Figs. 6 and 7 are cross-sectional views of the main part showing the periphery of the seal part of the washing tank of the dishwasher according to this embodiment. Fig. 6 is a drawing of the periphery of the seal part 130, cut along a vertical section parallel to the left-right direction and passing through point A shown in Fig. 5. Fig. 7 is a drawing of the periphery of the seal part 130, cut along a vertical section parallel to the left-right direction and passing through point B shown in Fig. 5. Hereinafter, the detailed configuration of the periphery of the seal portion 130 will be described with reference to FIGS.

[0030] The cleaning tank 100 according to this embodiment includes a first rib 141 and a second rib 142. The first rib 141 extends upward from the upper end 111 of the bottom member 110, and is disposed on the inner side of the cleaning tank 100 relative to the sealing portion 130 with a gap therebetween. More specifically, the first rib 141 is disposed on the entire circumference of the inner side of the cleaning tank 100. That is, in a plan view, a groove is formed between the sealing portion 130 and the first rib 141 on the entire circumference of the cleaning tank 100. Hereinafter, the groove is referred to as a trap groove 144. Also, the space between the trap groove 144 and the sealing portion 130 is referred to as a trap structure secondary side space 146. In this embodiment, the first rib 141 is integrally formed with the bottom member 110.

[0031] The second rib 142 extends downward from the lower end 121 of the side member 120, and is disposed between the seal portion 130 and the first rib 141. In this embodiment, the second rib 142 is integrally formed with the side member 120. That is, the second rib 142 is disposed in the trap groove 144. Therefore, in the cleaning tank 100 according to this embodiment, the first rib 141, the second rib 142, and the seal portion 130 form a trap structure 150. In other words, in the cleaning tank 100 according to this embodiment, the trap groove 144 forms the trap structure 150.

[0032] In this embodiment, the seal portion 130 has the following configuration. The seal portion 130 includes an outer peripheral rib 131, an inner peripheral rib 132, a seal member 134, and a seal rib 135. The outer peripheral rib 131 extends upward from the upper end 111 of the bottom member 110. The outer peripheral rib 131 is formed on the entire outer periphery of the bottom member 110. The inner peripheral rib 132 extends upward from the upper end 111 of the bottom member 110, is spaced apart from the outer peripheral rib 131, and is disposed on the inner side of the cleaning tank 100 than the outer peripheral rib 131. The inner peripheral rib 132 is formed on the entire outer periphery of the bottom member 110. That is, an annular groove 133 is formed between the outer peripheral rib 131 and the inner peripheral rib 132. A seal member 134 formed of an elastic body such as rubber is provided in the groove 133.

[0033] The seal rib 135 extends downward from the lower end 121 of the side member 120 and presses the seal member 134. The seal rib 135 is formed on the entire outer periphery of the side member 120. In this embodiment, the seal portion 130 configured as described above seals the entire periphery between the bottom member 110 and the side member 120. In other words, in this embodiment, the seal portion 130 configured as described above ensures watertightness of the entire periphery between the bottom member 110 and the side member 120. In this embodiment, the trap structure 150 is formed by the first rib 141, the second rib 142, and the inner periphery rib 132 of the seal portion 130. In this embodiment, the outer periphery rib 131 and the inner periphery rib 132 are integrally formed with the bottom member 110. In addition, the seal rib 135 is integrally formed with the side member 120.

[0034] Here, it is preferable that the upper end 132a of the inner circumferential rib 132 is disposed higher than the upper end 141a of the first rib 141. It is also preferable that the upper end 131a of the outer circumferential rib 131 is disposed higher than the upper end 132a of the inner circumferential rib 132.

[0035] Also, it is preferable that a portion of the second rib 142 contacts the bottom member 110. In this embodiment, the lower end 142a of the second rib 142 contacts the bottom member 110. Also, a notch 143 is formed in a portion of the lower end 142a of the second rib 142. As a result, a portion of the lower end 142a of the second rib 142 contacts the bottom member 110. Also, by forming the notch 143, even in the configuration in which the lower end 142a of the second rib 142 contacts the bottom member 110, the first rib 141 side and the inner circumferential rib 132 side of the trapping groove 144 are communicated with each other, and it becomes possible to store water in the trapping groove 144 as described later.

[0036] Moreover, it is preferable that the upper end 141a of the first rib 141 is disposed above the water level that accumulates inside the washing tank 100 when washing the tableware 200. That is, it is preferable that the upper end 141a of the first rib 141 is disposed above the water level 301 of the washing water 300 that accumulates inside the washing tank 100, as shown in FIG.

[0037] Moreover, it is preferable that the upper end 141a of the first rib 141 is disposed below the jet port of the cleaning nozzle 40. More specifically, in the cleaning nozzle 40 according to this embodiment, the upper nozzle 41 is formed with the jet port 41a, and the lower nozzle 42 is formed with the jet port 42a. The jet port 42a of the lower nozzle 42 is disposed below the jet port 41a of the upper nozzle 41. In such a case, it is preferable that the upper end 141a of the first rib 141 is disposed below the jet port 42a.

[0038] Moreover, the cleaning tank 100 preferably includes a shielding rib 145. The shielding rib 145 is provided on, for example, the second rib 142. The shielding rib 145 covers the space formed between the first rib 141 and the second rib 142 in a plan view. In other words, the shielding rib 145 covers the space formed between the first rib 141 and the second rib 142 from above. In addition, in order to allow water to flow between the shielding rib 145 and the first rib 141, a predetermined gap is provided between the lower surface of the shielding rib 145 and the upper end 141a of the first rib 141. For example, in this embodiment, the gap between the lower surface of the shielding rib 145 and the upper end 141a of the first rib 141 is 0.1 to 0.3 millimeters.

[0039] In addition, the side surface of the outer peripheral rib 131 on the seal rib 135 side is preferably shaped to incline toward the outside of the cleaning tank 100 toward the upper end 131a. In addition, the side surface of the seal rib 135 on the outer peripheral rib 131 side is preferably shaped to incline toward the inside of the cleaning tank 100 toward the lower end. In addition, the side surface of the seal rib 135 on the inner peripheral rib 132 side is preferably shaped to incline toward the outside of the cleaning tank 100 toward the lower end. In addition, the side surface of the inner peripheral rib 132 on the seal rib 135 side is preferably shaped to incline toward the inside of the cleaning tank 100 toward the upper end 132a. By adopting such a configuration for at least one of the outer peripheral rib 131, the inner peripheral rib 132, and the seal rib 135, it becomes easy to insert the seal rib 135 into the groove 133 between the outer peripheral rib 131 and the inner peripheral rib 132, and the cleaning tank 100 becomes easy to assemble.

[0040] In this embodiment, the bottom member 110 and the side member 120 are connected as follows. More specifically, as shown in FIG. 7, the side member 120 has an engagement portion 160 that faces the outer side surface of the outer peripheral rib 131. The outer peripheral rib 131 has a plurality of protrusions 160a that protrude toward the engagement portion 160. In addition, a hole 160b into which the protrusion 160a is inserted is formed at a position of the engagement portion 160 that faces the protrusion 160a. Therefore, when the side member 120 is brought closer to the bottom member 110 from above, the engagement portion 160 is pushed by the protrusion 160a and elastically deformed. Then, when the side member 120 is brought even closer to the bottom member 110 from above, the protrusion 160a is inserted into the hole 160b of the engagement portion 160. As a result, the engagement portion 160 and the protrusion 160a engage with each other, and the bottom member 110 and the side member 120 are connected to each other. By connecting the bottom member 110 and the side member 120 in this manner, the connection between the bottom member 110 and the side member 120 becomes easy.

[0041] Next, the effects obtained by the washing tub 100 of the dishwasher 1 according to the present embodiment will be described.

[0042] Fig. 8 is a cross-sectional view of the main part showing the periphery of the seal part of the washing tub of the dishwasher according to the present embodiment, showing the state in which water is pooled in the trap structure. Fig. 8 is a view of the periphery of the seal part 130 observed in the same cross section as Fig. 7. Fig. 8 also shows the state in which washing water 300 is pooled in the trap structure 150.

[0043] When the tableware 200 is washed inside the washing tank 100, the water sprayed from the spray nozzles 41a and 42a of the washing nozzle 40 accumulates in the trap groove 144, in other words, in the trap structure 150. When a certain amount of water accumulates in the trap structure 150, the water is sandwiched between the water in the trap structure 150 and the seal portion 130, and the trap structure secondary space 146 between the trap groove 144 and the seal portion 130 becomes a sealed space. When the trap structure secondary space 146 becomes a sealed space in this way, the water level in the trap structure 150 does not increase any more. Therefore, the dishwasher 1 according to this embodiment can suppress the intrusion of water into the seal portion 130 more than in the past. That is, the dishwasher 1 according to this embodiment can maintain the reliability of the seal portion 130 for a longer period of time than in the past.

[0044] In dishwasher 1 according to the present embodiment, washing tank 100 is housed in outer shell 2 so as to be freely inserted and removed through opening 2a of outer shell 2. In conventional dishwashers in which the washing tank is freely inserted and removed from the outer shell, water is likely to seep into the seal portion due to vibrations or impacts that occur in the washing tank when the washing tank is inserted and removed from the outer shell. For this reason, it is particularly effective to employ washing tank 100 according to the present embodiment, which can suppress water from seeping into seal portion 130 more than in the past, for dishwasher 1 in which washing tank 100 is freely inserted and removed from outer shell 2.

[0045] Moreover, the seal portion 130 according to the present embodiment includes an outer peripheral rib 131, an inner peripheral rib 132, a seal member 134, and a seal rib 135. That is, the seal portion 130 has a trap structure formed by the outer peripheral rib 131, the inner peripheral rib 132, and the seal rib 135. Therefore, even if the sealing function of the seal member 134 is impaired, the trap structure formed by the outer peripheral rib 131, the inner peripheral rib 132, and the seal rib 135 can suppress water leakage to the outside of the washing tank 100. Furthermore, since the trap structure does not require precise fitting, the assembly of the washing tank 100 can be facilitated, and the manufacturing cost of the dishwasher 1 can be reduced.

[0046] In addition, in the cleaning tank 100 according to this embodiment, the upper end 132a of the inner circumferential rib 132 is disposed higher than the upper end 141a of the first rib 141. In the cleaning tank 100 configured in this manner, the water level in the trap structure 150 reaches at most the height of the upper end 141a of the first rib 141, which is lower than the upper end 132a of the inner circumferential rib 132. Therefore, in the cleaning tank 100 configured in this manner, the intrusion of water into the seal portion 130 can be further suppressed, and the reliability of the seal portion 130 is further improved.

[0047] In addition, in the cleaning tank 100 according to this embodiment, the upper end 131a of the outer peripheral rib 131 is disposed above the upper end 132a of the inner peripheral rib 132. As described above, if the sealing function of the seal member 134 is impaired, water may accumulate in the trap structure formed by the outer peripheral rib 131, the inner peripheral rib 132, and the seal rib 135. In this case, if the upper end 131a of the outer peripheral rib 131 is disposed above the upper end 132a of the inner peripheral rib 132, the water level in the trap structure will be at most the height of the upper end 132a of the inner peripheral rib 132, which is lower than the upper end 131a of the outer peripheral rib 131. Therefore, in the cleaning tank 100 configured in this manner, water leakage to the outside of the cleaning tank 100 can be further suppressed.

[0048] In addition, in the washing tank 100 according to this embodiment, a portion of the second rib 142 is in contact with the bottom member 110. When the washing tank 100 is taken in and out of the outer shell 2, or when tableware 200 is washed, the washing tank 100 may vibrate, causing a downward force to act on the side member 120. At this time, since a portion of the second rib 142 is in contact with the bottom member 110, the sealing member 134 is not subjected to an excessive pressing force from the sealing rib 135. Therefore, in the washing tank 100 configured in this manner, the reliability of the sealing member 134 is improved.

[0049] Furthermore, in cleaning tank 100 according to this embodiment, upper end 141a of first rib 141 is positioned above the water level accumulated inside cleaning tank 100. In cleaning tank 100 configured in this manner, the water level in trap structure 150 can be prevented from rising above upper end 141a of first rib 141. Therefore, in cleaning tank 100 configured in this manner, intrusion of water into seal portion 130 can be further prevented, and the reliability of seal portion 130 is further improved.

[0050] In addition, in the cleaning tank 100 according to this embodiment, the upper end 141a of the first rib 141 is disposed below the jet ports 41a and 42a of the cleaning nozzle 40. In the cleaning tank 100 configured in this manner, the water jetted from the jet ports 41a and 42a is more likely to accumulate in the trap structure 150, making it easier to maintain the trap structure secondary space 146 as an airtight space. Therefore, in the cleaning tank 100 configured in this manner, the intrusion of water into the seal portion 130 can be further suppressed, and the reliability of the seal portion 130 is further improved.

[0051] Furthermore, the washing tank 100 according to this embodiment is provided with a shielding rib 145 that covers the space formed between the first rib 141 and the second rib 142 in a plan view. In the washing tank 100 configured in this manner, when water enters the trap structure 150, food residue contained in the water can be prevented from entering the trap structure 150. This allows the washing tank 100 to be kept clean, improving the reliability of the dishwasher 1.

[0052] As described above, the dishwasher 1 according to the present embodiment includes the washing tank 100 in which the dishes 200 are washed. The washing tank 100 includes the bottom member 110, the side member 120, the seal portion 130, the first rib 141, and the second rib 142. The bottom member 110 constitutes the bottom of the washing tank 100. The side member 120 constitutes the side surface of the washing tank 100. The seal portion 130 seals between the upper end portion 111 of the bottom member 110 and the lower end portion 121 of the side member 120. The first rib 141 extends upward from the upper end portion 111 of the bottom member 110, and is disposed on the inner side of the washing tank 100 relative to the seal portion 130 with a gap therebetween. The second rib 142 extends downward from the lower end portion 121 of the side member 120, and is disposed between the seal portion 130 and the first rib 141. In the dishwasher 1 according to the present embodiment, the first rib 141, the second rib 142 and the seal portion 130 form a trap structure 150.

[0053] In dishwasher 1 according to the present embodiment configured as described above, when water accumulates in trap structure 150, an enclosed space is formed between the water storage portion of trap structure 150 and seal portion 130. Therefore, in dishwasher 1 according to the present embodiment, after the enclosed space is formed, the water level in trap structure 150 does not increase. Therefore, dishwasher 1 according to the present embodiment can suppress water from entering seal portion 130 of washing tub 100 more than in the past. [Explanation of symbols]

[0054] 1 Dishwasher, 2 Outer shell, 2a Opening, 3 Door, 3a Exhaust port, 4 Lid, 6 Handle, 10 Operation panel, 11 Operation unit, 12 Power switch, 13 Operation switch, 14 Control device, 15 Water supply valve, 16 Water level detector, 17 Water temperature detector, 18 Water heater, 19 Pressure pump, 19a Pipe, 20 Drain pump, 20a Drain pipe, 21 Holding mechanism, 22 Fixed rail, 23 Drying heater, 24 Drying blower, 30 Shaft, 40 Washing nozzle, 41 Upper nozzle, 41a Spray nozzle, 42 Lower nozzle, 42a Spray nozzle, 50 Dish basket, 100 Washing tank, 101 Recess, 102 Opening, 110 Bottom member, 111 Upper end, 120 Side member, 121 Lower end, 130 Sealing portion, 131 outer peripheral rib, 131a upper end, 132 inner peripheral rib, 132a upper end, 133 groove, 134 sealing member, 135 sealing rib, 141 first rib, 141a upper end, 142 second rib, 142a lower end, 143 notch, 144 trap groove, 145 shielding rib, 146 trap structure secondary side space, 150 trap structure, 160 engagement portion, 160a convex portion, 160b hole, 200 tableware, 300 washing water, 301 water level.

Claims

1. It has a washing tank in which dishes are washed, The cleaning tank comprises: A bottom member that constitutes the bottom; A side member that configures a side surface; a seal portion that seals between an upper end portion of the bottom member and a lower end portion of the side member; a first rib extending upward from the upper end of the bottom member and disposed on an inner side of the cleaning tank with a gap between the first rib and the seal portion; a second rib extending downward from the lower end of the side member and disposed between the seal portion and the first rib; Equipped with the sealing portion includes an inner peripheral rib that is disposed on an outer side of the cleaning tank relative to the first rib and the second rib with a gap therebetween and that forms a groove between the inner peripheral rib and the first rib; A dishwasher in which the first rib, the second rib and the inner circumferential rib form a trap structure that stores water in the groove between the first rib and the inner circumferential rib.

2. An outer shell having an opening formed on a side surface, The cleaning tank is accommodated in the outer shell so as to be freely inserted and removed through the opening.

2. The dishwasher of claim 1.

3. The seal portion is a peripheral rib extending upwardly from the upper end of the bottom member; a seal member provided in a groove formed between the outer peripheral rib and the inner peripheral rib; a seal rib extending downward from the lower end of the side member and pressing the seal member; Equipped with the inner peripheral rib extends upward from the upper end of the bottom member, is spaced apart from the outer peripheral rib, and is disposed closer to the inside of the cleaning tank than the outer peripheral rib; 3. The dishwasher according to claim 1, wherein an upper end of the inner peripheral rib is disposed higher than an upper end of the first rib.

4. 4. The dishwasher according to claim 3, wherein an upper end of the outer peripheral rib is disposed higher than an upper end of the inner peripheral rib.

5. a side surface of the outer peripheral rib on the seal rib side is inclined toward the outside of the cleaning tank toward an upper end thereof, A side surface of the sealing rib on the outer peripheral rib side is inclined toward the inside of the cleaning tank toward a lower end thereof, a side surface of the sealing rib on the inner peripheral rib side is inclined toward an outside of the cleaning tank toward a lower end thereof, The side surface of the inner peripheral rib on the seal rib side is shaped to slope toward the inside of the cleaning tank as it approaches the upper end.

4. A dishwasher according to claim 3.

6. A dishwasher as described in any one of claims 1 to 5, wherein a portion of the lower end of the second rib is cut out along the extension direction of the second rib, the cut out portion of the lower end of the second rib is inserted into the groove between the first rib and the inner rib and does not contact the bottom member, and the uncut portion of the lower end of the second rib contacts the bottom member.

7. The dishwasher according to any one of claims 1 to 6, wherein an upper end of the first rib is positioned above a water level that accumulates inside the washing tub when dishes are washed.

8. A washing nozzle is provided inside the washing tank and sprays water from a nozzle when washing dishes, The dishwasher according to any one of claims 1 to 7, wherein an upper end of the first rib is positioned lower than the jet port of the cleaning nozzle.

9. The dishwasher according to any one of claims 1 to 8, further comprising a shielding rib that covers a space formed between the first rib and the second rib in a plan view.

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