dishwasher

Abstract

To provide a dishwasher that can prevent bubbles generated in a washing tank from leaking out of the washing tank through an overflow route.SOLUTION: A dishwasher includes: a washing tank 20 arranged inside an enclosure, and receiving dishes and the like; a rotational nozzle body arranged in the washing tank 20, and injecting water to the dishes and the like; a washing pump for sucking water collected in the bottom of the washing tank 20, and sending the water to a rotational nozzle body; a water supply unit for supplying water into the washing tank 20; an overflow route 130 which is connected to the washing tank 20, and through which the water overflowing out of the washing tank 20 pass when a water level in the washing tank 20 abnormally rises; a footrest bottom part provided at the bottom of the enclosure, and receiving drainage from an overflow outlet 131 being an outlet of the overflow route 130; and a filter 140 arranged in the overflow route 130, and preventing the bubbles from progressing into the overflow outlet 131 when the bubbles enter the overflow route 130 from the inside of the washing tank 20.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a dishwasher. [Background technology]

[0002] A dishwasher and dryer having an overflow collection container below the washing tub, in which overflow from the washing tub is introduced into the overflow collection container via a dedicated overflow pipe, is described in Patent Document 1. The overflow collection container is provided with an overflow detection device, which operates when the water level in the overflow collection container reaches a specified height. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-265244 Summary of the Invention [Problem to be solved by the invention]

[0004] In dishwashers, detergents with low foaming properties are used specifically for dishwashers to suppress foaming during washing. However, there are cases where high foaming kitchen detergents are mistakenly used in dishwashers, and in such cases, a large amount of foam may be generated in the washing tub.

[0005] In a configuration such as the dishwasher in Patent Document 1 above, in which overflow from the washing tub is guided via an overflow path into a receiving section provided outside the washing tub, when a large amount of foam is generated in the washing tub, there is a risk that the foam will leak out of the washing tub via the overflow path.

[0006] This can cause problems in the dishwasher due to the leaking foam, for example, if a spill detection device is provided in the spill catcher, it can erroneously detect that spillage has occurred.

[0007] Therefore, an object of the present invention is to provide a dishwasher that can prevent foam generated in the washing tub from leaking out of the washing tub through an overflow path. [Means for solving the problem]

[0008] A dishwasher according to a main aspect of the present invention comprises a washing tub arranged within a housing and containing tableware, a spray body arranged in the washing tub and spraying water onto the tableware, a washing pump that sucks in water accumulated in the bottom of the washing tub and sends it to the spray body, a water supply unit that supplies water into the washing tub, an overflow path connected to the washing tub and through which water that overflows outside the washing tub when the water level in the washing tub rises abnormally, and a water supply device provided at the bottom of the housing and receiving water discharged from an outlet of the overflow path. , the water accumulates A receiving portion and a water detection device for detecting water accumulated in the receiving portion; The cleaning device further includes a filter disposed in the overflow path and configured to suppress the progression of foam toward the outlet when foam enters the overflow path from within the cleaning tank.

[0009] According to the above configuration, even if a large amount of foam is generated in the cleaning tub due to the misuse of kitchen detergent, for example, the foam can be prevented from leaking out of the cleaning tub through the overflow path, thereby preventing problems caused by leaking foam. In particular, it is possible to prevent the water detection device from erroneously detecting bubbles accumulated in the receiving section as an overflow abnormality.

[0010] In the dishwasher according to this aspect, the filter may be formed of a nonwoven fabric or a sponge.

[0011] According to the above configuration, the filter is capable of allowing water to pass through smoothly while restricting the passage of bubbles due to minute gaps between the fibers of the nonwoven fabric or the numerous minute pores of the sponge.

[0012] In the dishwasher of this embodiment, the spray body sprays warm water, and the washing tub has an inlet to the overflow path provided at a height position such that at least a portion of the inlet is exposed above the water surface at the water level in the washing tub where the dishes are washed, and the overflow path includes a vertical water channel extending upward toward the outlet at a position higher than the inlet, and the filter can be arranged in the vertical water channel.

[0013] According to the above configuration, the entire entrance of the overflow path is not submerged in the water stored in the cleaning tank, so that the air inside the cleaning tank that expands when warm water is sprayed from the spray body can be released outside the cleaning tank via the overflow path.

[0014] On the other hand, because bubbles tend to exist near the water surface, if the overflow path entrance is not entirely submerged, bubbles will easily enter the overflow path. However, because the overflow path includes a vertical water passage and a filter is disposed in the vertical water passage, bubbles rising up the vertical water passage against gravity can be brought into contact with the filter. This prevents the bubbles from entering the filter with force, and the filter is more likely to block the bubbles. Therefore, even if bubbles are more likely to enter the overflow path, it is possible to reliably prevent bubbles from leaking from the outlet of the overflow path. Effect of the Invention

[0015] According to the present invention, a dishwasher can be provided that can prevent foam generated in the washing tub from leaking out of the washing tub through the overflow path.

[0016] The effects and significance of the present invention will become clearer from the following description of the embodiments. However, the following embodiment is merely an example of how the present invention can be put into practice, and the present invention is not limited to the embodiment described below. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a front view of a dishwasher according to an embodiment. [Diagram 2]FIG. 2 is a schematic diagram of the dishwasher seen from the front, showing the internal configuration of the dishwasher according to the embodiment. [Diagram 3] FIG. 3 is a perspective view of a water channel case to which a water supply valve, a drain pipe, and a drain hose are connected, as viewed from above and in front, according to the embodiment. [Figure 4] FIG. 4 is a perspective view of a front case constituting a water channel case and a filter as viewed from above and behind according to the embodiment. [Diagram 5] FIG. 5 is a side cross-sectional view of the main parts of the cleaning tank and the water channel case taken at the position of the water inlet according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0019] Fig. 1 is a front view of a dishwasher 1. Fig. 2 is a schematic diagram of the dishwasher 1 as viewed from the front, showing the internal configuration of the dishwasher 1.

[0020] Dishwasher 1 includes a housing 10 that forms an outer shell. A box-shaped washing tub 20 is arranged inside housing 10. A dish insertion opening 21 is provided in the front of washing tub 20. Insertion opening 21 is covered by a door 11 provided in the front of housing 10. Door 11 opens upward. A window 11a is provided in the upper part of door 11. Door 11 also includes an exhaust port (not shown) at a predetermined position.

[0021] An operation panel 12 is provided under a door 11 on the front surface of the housing 10. The operation panel 12 is provided with a plurality of operation buttons (not shown) such as a start button, and a plurality of display units (not shown) such as LEDs.

[0022] The housing 10 includes a footrest 13 that constitutes its bottom. The footrest 13 supports the cleaning tank 20 from below. The bottom surface 13a of the footrest 13 has the lowest part near the center, and water that overflows from the cleaning tank 20 accumulates in the bottom surface 13a around this lowest part. A water detection device 14 that detects the accumulated water is disposed in the lowest part of the bottom surface 13a. The water detection device 14 includes a float 14a and a detection switch 14b that detects the float 14a. When the float 14a rises to a predetermined height due to the water accumulated in the bottom surface 13a, it comes into contact with the detection switch 14b, which activates the detection switch 14b. The bottom surface 13a of the footrest 13 corresponds to the receiving portion of the present invention.

[0023] A water storage recess 22 is formed in the bottom wall 20a of the washing tub 20 at the center of the left and right sides of the front side. The water storage recess 22 is covered by a cover 23 having an opening 23a. A food residue filter 24 is disposed in the opening 23a. Water is stored in the bottom of the washing tub 20. The stored water passes through the food residue filter 24 and flows into the water storage recess 22. At this time, food residue that has come out of the dishes and is contained in the water is collected in the food residue filter 24. A loop-shaped heater 25 is disposed in the water storage recess 22.

[0024] A water supply channel 30 extending in the left-right direction is disposed at the bottom of the cleaning tank 20. The right side of the water supply channel 30 is higher than the left side. A cylindrical nozzle shaft 31 protruding upward is formed on the upper surfaces of the left and right sides of the water supply channel 30. A rotary nozzle body 41 is rotatably connected to each of the left and right nozzle shafts 31. The position of the right rotary nozzle body 41 is higher than the position of the left rotary nozzle body 41. Each rotary nozzle body 41 is a hollow body having an elongated elliptical planar shape, and has a plurality of nozzles 41a with injection holes on its upper surface.

[0025] A fixed nozzle body 42 is provided on the upper part of the rear wall 20b of the cleaning tank 20. The fixed nozzle body 42 is a hollow body having a rectangular planar shape elongated in the left-right direction, and has a plurality of nozzles 42a with injection holes on its front surface. A branch water passage 32 branching from the center of the water supply passage 30 extends rearward and then upward along the rear wall 20b, and is connected to the center of the fixed nozzle body 42.

[0026] The rotary nozzle body 41 and the fixed nozzle body 42 correspond to the jet body of the present invention.

[0027] A cleaning pump 51 and a drain pump 52 are disposed below the cleaning tank 20. The cleaning pump 51 is, for example, a centrifugal pump, and has a suction port connected to the water storage recess 22 via the suction passage 26 and a discharge port connected to the inlet 33 extending downward from the left end of the water supply passage 30. The cleaning pump 51 sucks in water stored at the bottom of the cleaning tank 20, and sends the sucked water via the water supply passage 30 and the branch water passage 32 to the left and right rotating nozzle bodies 41 and fixed nozzle bodies 42.

[0028] Drain pump 52 is, for example, a centrifugal pump, with an inlet connected to water storage recess 22 via drainage channel 27 and an outlet connected to drainage pipe 61. Drainage pipe 61 forms part of drainage path 60 extending outside the machine. Drainage pump 52 sucks in water stored in the bottom of cleaning tank 20 and discharges the sucked water outside the machine via drainage path 60.

[0029] A dish basket 70 is disposed in the washing tub 20. The dish basket 70 is located above the two rotating nozzle bodies 41, and includes a basket body 71 that holds tableware, and left and right legs 72 that support the basket body 71.

[0030] A circular water inlet 111 is provided in the center of the lower part of the rear wall 20b of the cleaning tank 20. A water supply unit 80 is provided behind the rear wall 20b. The water supply unit 80 includes a water supply valve 81 connected to a water faucet and a water supply path 110 connecting the water supply valve 81 and the cleaning tank 20, and supplies water into the cleaning tank 20. When the water supply valve 81 is opened, water that has flowed through the water supply path 110 is poured into the cleaning tank 20 from the water inlet 111 and accumulates at the bottom of the cleaning tank 20.

[0031] The water supply path 110 is configured inside the water channel case 100 (see FIG. 4). The water channel case 100 is attached from the rear to the rear wall 20b of the cleaning tank 20. In addition to the water supply path 110, an intermediate drainage path 120 that is the intermediate portion of the drainage path 60, and an overflow path 130 through which water that overflows outside the cleaning tank 20 passes are configured inside the water channel case 100 (see FIG. 4).

[0032] A circular air outlet 28 is provided at the right end of the lower part of the rear wall 20b of the cleaning tank 20. A blower 90 is disposed behind the rear wall 20b. The blower 90 includes an air passage 91 connected to the air outlet 28, and a blower fan 92 disposed in the air passage 91. Wind generated by the operation of the blower fan 92 passes through the air passage 91 and is introduced into the cleaning tank 20 from the air outlet 28.

[0033] Next, the configuration of the water channel case 100 will be described in detail.

[0034] Fig. 3 is a perspective view of the water channel case 100 to which the water supply valve 81, the drain pipe 61, and the drain hose 62 are connected, as viewed from above the front. Fig. 4 is a perspective view of the front case 100a and the filter 140 that constitute the water channel case 100, as viewed from above the rear. Fig. 5 is a side cross-sectional view of the cleaning tank 20 and the main parts of the water channel case 100 cut at the position of the water inlet 111.

[0035] 3, the water channel case 100 is formed by joining a front case 100a and a rear case 100b in the front-rear direction, and has a shape that is long in the vertical direction and flat in the front-rear direction. The upper end of the water channel case 100 has an arc shape.

[0036] A cylindrical water inlet 111 that protrudes forward is formed at the lower front surface of the water channel case 100. A plurality of ribs 111a are formed in a line along the circumferential direction on the outer peripheral surface of the water inlet 111. In addition, an arc-shaped flange 111b is formed at the upper rear end of the water inlet 111.

[0037] A bell-shaped overflow port 131 is formed above the water inlet 111 on the front surface of the water channel case 100 .

[0038] At the lower end of the water channel case 100, a cylindrical pipe connection port 121 that protrudes forward is formed on the left side, and a cylindrical hose connection port 122 that protrudes downward is formed on the right side. A drain pipe 61 extending from the drain pump 52 is connected to the pipe connection port 121. A drain hose 62 is connected to the hose connection port 122. The drain hose 62 is pulled out to the outside of the machine from a hole (not shown) formed in the housing 10.

[0039] A cylindrical valve connection port 112 that protrudes downward is formed in the protruding portion on the right side of the water channel case 100. An outlet 81a of a water supply valve 81 is connected to the valve connection port 112. The water supply valve 81 is provided with a flow rate sensor 82 that detects the flow rate of water flowing out from the water supply valve 81. The amount of water to be supplied to the cleaning tank 20 is determined based on the flow rate detected by the flow rate sensor 82.

[0040] The water channel case 100 is formed at predetermined positions with a mounting tab 101 and two mounting bosses 102 used for mounting to the cleaning tank 20. The mounting tab 101 and each mounting boss 102 are formed with insertion holes 101a, 102a, respectively, through which screws are passed.

[0041] 5, when the water channel case 100 is attached to the rear wall 20b of the cleaning tank 20, the tip of the water inlet 111 is fitted into a mounting hole 29 formed in the rear wall 20b. The space between the water inlet 111 and the mounting hole 29 is water-sealed by an O-ring 103.

[0042] As shown in FIG. 4, the inside of the water channel case 100 is divided by ribs of a predetermined shape to form a water supply channel 110, an intermediate drainage channel 120, and an overflow channel .

[0043] The water supply path 110 extends from its inlet, the valve connection port 112, to its outlet, the water inlet 111, and includes a first water supply path 113, a second water supply path 114, and a third water supply path 115. The first water supply path 113 extends upward from the valve connection port 112 along the right side surface of the water channel case 100 to the top of the water channel case 100, then turns inward and extends downward, and then turns inward again to the top and connects to the second water supply path 114. The second water supply path 114 extends downward from the top of the water channel case 100 along the left side surface to the vicinity of the water inlet 111 and connects to the third water supply path 115. The third water supply path 115 is a semi-elliptical space when viewed in the front-to-rear direction, and connects to the water inlet 111 from the rear. The water flowing out from the water supply valve 81 flows through the water supply path 110 as indicated by the solid arrow in FIG.

[0044] The intermediate drainage channel 120 is formed in the space between the first water supply channel 113 and the second water supply channel 114 of the water supply channel 110, and constitutes the drainage channel 60 together with the drainage pipe 61 and the drainage hose 62. The intermediate drainage channel 120 extends upward from its inlet, a pipe connection port 121, and then bends back in an inverted U shape and extends downward to its outlet, a hose connection port 122. As indicated by the dashed arrows in FIG. 4, the wastewater flowing in from the drainage pipe 61 flows through the intermediate drainage channel 120 and flows out to the drainage hose 62.

[0045] The height of the folded portion of the intermediate drainage channel 120 is set higher than the water level stored in the cleaning tank 20 during the cleaning operation. This prevents water from being discharged from the cleaning tank 20 when the drain pump 52 is stopped.

[0046] Overflow path 130 is an L-shaped path when viewed from the left and right, extending from water inlet 111, which is its inlet, to overflow port 131, which is its outlet, and includes third water supply path 115 and vertical water path 132. In other words, overflow path 130 shares water inlet 111 and third water supply path 115 with water supply path 110.

[0047] The vertical water passage 132 has a rectangular cross section in the horizontal direction, and extends upward from the upper end of the third water supply passage 115 toward the overflow port 131. The vertical water passage 132 is adjacent to the second water supply passage 114, and is located at a higher position than the water inlet 111. Two ribs 133 extending in the left-right direction are formed on the front wall of the vertical water passage 132 at a predetermined interval in the up-down direction.

[0048] As shown in Fig. 5, a rectangular parallelepiped filter 140 is disposed in the vertical water channel 132 so as to be sandwiched between two ribs 133. The filter 140 covers the entire horizontal cross section of the vertical water channel 132. The filter 140 is formed of a nonwoven fabric of a resin such as polyether, and is configured to have minute gaps between the entangled fibers. The mesh size of the filter 140, i.e., the size of the gaps and the thickness in the vertical direction, are adjusted so that the passage of bubbles is sufficiently suppressed while water can pass smoothly.

[0049] The dishwasher 1 can perform various cleaning operations.

[0050] Before the washing operation is started, dishes are placed in the dish basket 70, and detergent specially designed for dishwashers is poured into the washing tub 20.

[0051] When the cleaning operation is started, the washing step is carried out first.

[0052] The water supply valve 81 is opened and water is supplied into the cleaning tank 20. This causes water to accumulate at the bottom of the cleaning tank 20. The amount of water to be supplied is determined based on the flow rate detected by the flow rate sensor 82. When the amount of water to be supplied, i.e., the amount of water stored in the cleaning tank 20, reaches a predetermined amount, the water supply valve 81 is closed and the water supply stops. Cleaning water is produced by mixing detergent into the water stored in the cleaning tank 20.

[0053] 2, the water level L in the cleaning tank 20 during the washing step is at the position of the lower part of the water inlet 111. Therefore, the upper part of the water inlet 111 is exposed above the water surface of the water stored in the cleaning tank 20. This is also the case in the rinsing step.

[0054] Heater 25 operates to heat the wash water in washing tub 20. When the wash water has reached a predetermined temperature, washing pump 51 starts operating and sends the wash water to rotary nozzle body 41 and fixed nozzle body 42. Washing water is sprayed from multiple nozzles 41a of rotary nozzle body 41 and multiple nozzles 42a of fixed nozzle body 42 toward the tableware held in dish basket 70, washing the tableware. At this time, rotary nozzle body 41 rotates due to the reaction force of the sprayed water.

[0055] When high-temperature cleaning water is sprayed from the rotary nozzle body 41 and the fixed nozzle body 42, the air in the cleaning tank 20 is heated and expands. Because the water inlet 111, which is the inlet of the overflow path 130, is not entirely submerged in the cleaning water, the overflow path 130 is not completely closed by the cleaning water. Therefore, the expanded air passes through the overflow path 130 and escapes from the overflow port 131 to the outside of the cleaning tank 20. This makes it possible to prevent air from being discharged from the exhaust port of the door 11, and to prevent the cleaning water from leaking out of the machine together with the air from the exhaust port.

[0056] When a predetermined washing time has elapsed, the washing pump 51 is stopped. The drain pump 52 is operated to drain the washing water in the washing tank 20 to the outside of the machine through the drain path 60.

[0057] Next, multiple rinsing steps are performed. In each rinsing step, after a predetermined amount of water is stored in the washing tank 20, the washing pump 51 operates, and water is sprayed from the rotary nozzle body 41 and the fixed nozzle body 42 onto the tableware to rinse the tableware. In the rinsing steps other than the final one, the heater 25 does not operate and the water is not heated. In the final rinsing step, the heater 25 operates and the water is heated to a predetermined temperature. As a result, in the final rinsing step, high-temperature water is sprayed onto the tableware. In each rinsing step, when a predetermined rinsing time corresponding to the respective step has elapsed, the washing pump 51 stops, and the drain pump 52 operates to drain water from the washing tank 20.

[0058] Finally, the drying step is performed. The blower fan 92 operates to introduce air into the washing tub 20 through the air outlet 28. The air blows onto the dishes that have been warmed by the hot water in the final rinsing step, drying the dishes. The moist air is mainly exhausted through the exhaust port of the door 11. After a predetermined drying time has elapsed, the blower fan 92 stops.

[0059] Thus, the cleaning operation is completed.

[0060] However, when supplying water to the cleaning tank 20, it may happen that the water supply valve 81 does not close even if a predetermined amount of water is stored. For example, this may occur when the water supply valve 81 itself is broken or when the flow rate sensor 82 is broken. In such a case, the water level in the cleaning tank 20 rises abnormally. As the water level in the cleaning tank 20 rises, the water level in the overflow path 130 rises to the same height as the water level in the cleaning tank 20. Then, when the water level in the cleaning tank 20, i.e., the water level in the overflow path 130, becomes higher than the lower edge of the overflow port 131, water overflows from the overflow port 131.

[0061] In this way, when the water level in the cleaning tank 20 rises abnormally due to a water supply abnormality, the water in the cleaning tank 20 overflows out of the cleaning tank 20 through the overflow path 130, as shown by the solid arrow in Figure 5. At this time, the water that rises up the vertical water channel 132 and reaches the filter 140 passes smoothly through the gaps between the fibers of the filter 140.

[0062] The water discharged from the overflow port 131 flows to the bottom surface 13a of the base 13 and accumulates on the bottom surface 13a, mainly around the lowest part. The accumulated water is detected by the water detection device 14, and an overflow abnormality is detected. If closing control to close the water supply valve 81 is not being performed, closing control is performed and the drain pump 52 operates. This causes the water in the cleaning tank 20 to be drained, and water leakage from within the cleaning tank 20 is stopped. Furthermore, an error message indicating an overflow abnormality is displayed on the display unit of the operation panel 12.

[0063] In dishwasher 1, foaming is likely to occur due to the configuration in which wash water is circulated by wash pump 51, so as described above, a detergent with low foaming properties designed specifically for dishwashers is used. However, there is a risk that a high-foaming kitchen detergent may be mistakenly used in dishwasher 1, in which case a large amount of foam will be generated in wash tub 20 when wash pump 51 operates during wash operation.

[0064] Foam generated in the cleaning tank 20 can enter the overflow path 130 from the water inlet 111. In particular, since bubbles tend to exist near the water surface, if the upper part of the water inlet 111 is exposed above the water surface, the bubbles tend to enter the overflow path 130 from the water inlet 111.

[0065] As shown by the dashed arrow in FIG. 5, the foam that has entered the overflow path 130 passes through the third water supply passage 115, and then rises up the vertical water passage 132 to reach the filter 140. Most of the bubbles have a diameter larger than the gaps between the fibers of the filter 140 and cannot pass through the gaps. Therefore, most of the bubbles are stopped by the filter 140 and the progress of the bubbles to the overflow port 131 is suppressed. This suppresses the leakage of the foam from the overflow port 131 and prevents the occurrence of problems due to the leaked foam. For example, it is prevented that the water detection device 14 detects the foam accumulated on the bottom surface portion 13a of the foot stand 13 and erroneously detects an overflow abnormality.

[0066] <Effects of the embodiment> According to this embodiment, the dishwasher 1 is connected to the washing tub 20 and includes an overflow path 130 through which water that overflows from the washing tub 20 passes when the water level in the washing tub 20 rises abnormally, and a filter 140 is disposed in the overflow path 130 to suppress the progress of foam toward the outlet, ie, overflow port 131, when foam enters the overflow path 130 from inside the washing tub 20. As a result, even if kitchen detergent is mistakenly used and a large amount of foam is generated in the washing tub 20, the foam can be suppressed from leaking out of the washing tub 20 through the overflow path 130, and malfunctions caused by leaked foam can be prevented.

[0067] Furthermore, according to this embodiment, the filter 140 is made of nonwoven fabric. This allows the filter 140 to smoothly pass water while suppressing the passage of bubbles due to minute gaps between the fibers of the nonwoven fabric. This allows the overflow function of the overflow path 130 to be sufficiently ensured.

[0068] Furthermore, according to this embodiment, in the cleaning tank 20, the water inlet 111, which is the inlet of the overflow path 130, is provided at a height position where a part of the water inlet 111 is exposed above the water surface relative to the water level in the cleaning tank 20 during the washing process. The overflow path 130 includes a vertical water channel 132 that extends upward toward the overflow port 131 side at a position higher than the water inlet 111, and a filter 140 is disposed in the vertical water channel 132.

[0069] According to this configuration, the entire water inlet 111 is not submerged in the water stored in the cleaning tank 20, so that the air inside the cleaning tank 20 that expands when warm water is sprayed from the rotating nozzle body 41 and the fixed nozzle body 42 can be released outside the cleaning tank 20 via the overflow path 130.

[0070] On the other hand, since bubbles tend to exist near the water surface, if the entire water inlet 111 is not submerged, bubbles tend to invade the overflow path 130 from the water inlet 111. However, since the overflow path 130 includes the vertical water passage 132 and the filter 140 is disposed in the vertical water passage 132, bubbles rising up the vertical water passage 132 against gravity can be brought into contact with the filter 140. This prevents the bubbles from entering the filter 140 with force, and the filter 140 tends to block the bubbles. Therefore, even if bubbles tend to invade the overflow path 130, bubbles can be reliably prevented from leaking from the overflow port 131.

[0071] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications of the embodiment of the present invention are possible.

[0072] For example, in the above embodiment, filter 140 is formed of nonwoven fabric. However, filter 140 may be formed of sponge, which is a porous body. In this case, filter 140 can smoothly pass water while suppressing the passage of bubbles due to the many fine holes of the sponge. Furthermore, filter 140 may be formed of other materials that have the property of easily passing water and difficultly passing bubbles.

[0073] Furthermore, in the above embodiment, the overflow path 130 shares a part of the path including the water inlet 111 with the water supply path 110. However, the overflow path 130 may have an inlet provided in the rear wall 20b or another side wall in the cleaning tank 20, so that a part of the path is not shared with the water supply path 110. Furthermore, the shape of the overflow path 130 is not limited to that of the above embodiment, and may be another shape.

[0074] Furthermore, in the above embodiment, the water inlet 111, which is the inlet of the overflow path 130, is provided at a height position such that a part of it is exposed above the water surface relative to the water level in the cleaning tank 20 in the washing process. However, the inlet of the overflow path 130 may be provided at a height position such that the entire inlet is exposed above the water surface relative to the water level in the cleaning tank 20 in the washing process. Also, the inlet of the overflow path 130 may be provided at a height position such that the entire inlet is submerged in the water level in the cleaning tank 20 in the washing process.

[0075] Furthermore, in the above embodiment, two rotary nozzle assemblies 41 and a fixed nozzle assemblies 42 are provided in the cleaning tank 20. However, the cleaning tank 20 may be configured to include only one or more rotary nozzle assemblies 41, or may be configured to include only one or more fixed nozzle assemblies 42.

[0076] Furthermore, in the above embodiment, the cleaning pump 51 and the drainage pump 52 are provided separately. However, a cleaning / drainage pump having the functions of both the cleaning pump 51 and the drainage pump 52 may be provided. For example, the cleaning / drainage pump may be configured to include an impeller for cleaning and an impeller for drainage, and these impellers may be rotated by forward and reverse rotation of the motor.

[0077] Furthermore, in the above embodiment, the water supply path 110 and the overflow path 130 are configured inside the water channel case 100. However, the water supply path 110 and the overflow path 130 may be configured by separate members.

[0078] Furthermore, in the above embodiment, the air blower 90 is configured not to heat the air sent into the cleaning tank 20. However, the air blower 90 may be configured to heat the air sent into the cleaning tank 20 by a heater or the like. Also, a configuration may be adopted in which the air introduced into the cleaning tank 20 is heated by a heater to become hot air in the cleaning tank 20.

[0079] Furthermore, in the above embodiment, the dishwasher 1 is provided with the blower 90, but it may not be provided with the blower 90 and may not have a drying function.

[0080] In addition, the embodiments of the present invention can be modified in various ways as appropriate within the scope of the technical ideas set forth in the claims. [Explanation of symbols]

[0081] 1 Dishwasher 10. Chassis 13 pedestal 13a Bottom part (receiving part) 20 Cleaning tank 41 Rotating nozzle body (jet body) 42 Fixed nozzle body (jet body) 51 Cleaning pump 80 Water supply section 111 Water inlet (overflow entrance) 130 Overflow route 131 Overflow outlet (exit of overflow route) 132 Vertical Channel 140 Filters

Claims

1. A washing tub disposed within the housing and configured to accommodate tableware; A jet of water is disposed in the washing tank and jets water onto the tableware. a cleaning pump that sucks water stored in the bottom of the cleaning tank and sends it to the jet; A water supply unit that supplies water into the cleaning tank; an overflow path connected to the cleaning tank, through which water overflowing from the cleaning tank passes when the water level in the cleaning tank rises abnormally; a receiving portion provided at a bottom of the housing, receiving water discharged from an outlet of the overflow path and storing the water; a water detection device for detecting water accumulated in the receiving portion; a filter disposed in the overflow path and configured to suppress the progression of foam toward the outlet when foam enters the overflow path from within the cleaning tank; A dishwasher comprising:

2. 2. The dishwasher according to claim 1, The filter is formed of a nonwoven fabric or a sponge. A dishwasher characterized by:

3. In the dishwasher according to claim 1 or 2, The jet ejects hot water, The washing tank has an inlet of the overflow path provided at a height position such that at least a part of the inlet is exposed above the water surface at a water level in the washing tank where the tableware is washed, The overflow path includes a vertical water passage extending upward toward the outlet side at a position higher than the inlet, The filter is disposed in the vertical water channel. A dishwasher characterized by:

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