Dishwasher

Abstract

To provide a dishwasher designed in view of conventional conditions, and having excellent residue collecting performance, washing performance and drainage performance.SOLUTION: A dishwasher comprises a filter unit 29 including a first body 61, a second body 62 and a third body 63. The first to third bodies 61 to 63 respectively include first to third filter parts 61a to 63a. The first filter part 61a has a plurality of first holes 610 formed therein. The second filter part 62a has a plurality of second holes 620 formed therein. The third filter part 63a has a plurality of third holes 630 formed therein. A gap S communicating with each of the second holes 620 and each of the third holes 630 is formed between the second filter part 62a and the third filter part 63a. The second body 62 includes a communication hole 624 formed therein, the communication hole communicating with the gap S from above and allowing wash water to flow into the gap S from above to below.SELECTED DRAWING: Figure 7

Description

[Technical field]

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

[0002] Patent Document 1 discloses a conventional dishwasher. This dishwasher includes a washing tank, a filter unit, a pump, a supply path, and a discharge path. A washing space and a water storage section are formed in the washing tank. The washing space is capable of storing an object to be washed and washing the object with washing water. The water storage section is located below the washing space, and stores the washing water.

[0003] The filter unit is capable of collecting residue contained in the cleaning water while circulating the cleaning water. The pump is capable of supplying the cleaning water to the cleaning space. The supply path is connected to the water storage section and circulates the cleaning water that has passed through the filter unit to the pump. The discharge path is connected to the water storage section and discharges the cleaning water that has passed through the filter unit to the outside of the cleaning tank.

[0004] Specifically, the filter unit is composed of a first body, a second body, and a third body. The first body is provided in the cleaning tank and covers the water storage section from above. The first body has a first filter section. The second body is inserted into the first body. The second body has a second filter section. The second filter section is cylindrical and extends downward from the first filter section, and cleaning water and residue can flow through it. The third body is located below the first body, and has the first body placed on top of it. The third body has a third filter section. The third filter section is cylindrical and has a larger diameter than the second filter, and covers the second filter section from the outside.

[0005] Further, the first filter section has a plurality of first holes formed therein. The second filter section has a plurality of second holes formed therein, each of which has an opening area larger than the opening area of ​​each of the first holes. The third filter section has a plurality of third holes formed therein, each of which has an opening area smaller than the opening area of ​​each of the second holes. A gap is formed between the second filter section and the third filter section.

[0006] In this dishwasher, the objects to be washed are washed with wash water in the washing space, so that residues such as leftover food adhering to the objects to be washed are peeled off from the objects to be washed. As a result, the residues are contained in the wash water. Then, the wash water containing the residues flows through the filter unit, i.e., the first to third bodies. At this time, in the first filter section of the first body, the wash water flows through each of the first holes, while residues larger than each of the first holes are collected by each of the first holes. Also, in the second filter section of the second body, the wash water flows through each of the second holes, while residues larger than each of the second holes are collected by each of the second holes. Then, the wash water and residues that have flowed through each of the second holes flow to the outside of the second filter section toward the gap. In the third filter section, of the cleaning water and the residue that have flowed through the gaps, the cleaning water flows through each of the third holes, while the residue that is larger than each of the third holes is collected by each of the third holes.

[0007] The washing water that has flowed through the filter unit is supplied again into the washing space by the pump through the supply path. After the washing of the objects is completed, the washing water that has flowed through the filter unit is discharged through the drain path to the outside of the washing tank and eventually to the outside of the dishwasher. In this way, in this dishwasher, the washing water can be filtered by the filter unit, so that the washing water supplied into the washing space by the pump and the washing water discharged to the outside of the dishwasher are less likely to contain residue. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Japanese Patent Application Publication No. 2-152431 Summary of the Invention [Problem to be solved by the invention]

[0009] However, in the conventional dishwasher, the residues collected by the third filter part adhere to the third filter part, and the third holes are easily clogged. As a result, the flow of wash water toward the supply path and the drain path is easily obstructed in the dishwasher. This reduces the circulation of wash water during the wash operation for washing the objects to be washed and during the rinse operation for rinsing the objects to be washed, and the washing performance and drainage performance of the dishwasher are reduced.

[0010] The present invention has been made in consideration of the above-mentioned conventional situation, and has as its object to provide a dishwasher that has excellent residue collection performance, as well as excellent cleaning and drainage performance. [Means for solving the problem]

[0011] The dishwasher of the present invention includes a washing tank having a washing space in which an object to be washed can be washed with washing water and a water storage section located below the washing space and storing the washing water; a filter unit capable of collecting residue contained in the cleaning water while circulating the cleaning water; A pump capable of supplying the cleaning water to the cleaning space; a supply passage communicating with the water storage section and for circulating the cleaning water that has passed through the filter unit to the pump; a discharge passage communicating with the water storage section and discharging the cleaning water that has passed through the filter unit to the outside of the cleaning tank; the filter unit includes a first body provided in the cleaning tank and covering the water storage portion from above, a second body inserted into the first body, and a third body located below the first body; The first body has a first filter portion having a plate shape, the second body has a cylindrical shape extending downwardly beyond the first filter portion and includes a second filter portion through which the cleaning water and the residue can flow, the third body has a cylindrical third filter portion having a larger diameter than the second filter portion and covering the second filter portion from the outside, The first filter section is formed with a plurality of first holes that communicate with the water storage section and allow the cleaning water to flow while collecting the residue that is larger than the first filter section; The second filter section is formed with a plurality of second holes each having an opening area larger than each of the first holes and capable of collecting the residue larger than the second filter hole while allowing the cleaning water to flow therethrough; The third filter section is formed with a plurality of third holes each having an opening area smaller than each of the second holes and capable of collecting the residue larger than the third filter section while allowing the cleaning water to flow therethrough, A cylindrical gap is formed between the second filter section and the third filter section, the gap communicating with each of the second holes and each of the third holes. The cleaning water and the residue flowing through each of the second holes flow to the outside of the second filter portion toward the gap, The first body, the second body or the third body is characterized in that a communication hole is formed which communicates with the gap from above and allows the cleaning water to flow within the gap from above downward.

[0012] In the dishwasher of the present invention, the filter unit has a first body, a second body, and a third body. A gap is formed between the second filter part of the second body and the third filter part of the third body, and the gap communicates with each of the second holes and each of the third holes.

[0013] In the first filter section of the first body, the cleaning water flows through each of the first holes, while residues larger than the first holes cannot pass through each of the first holes and are collected in each of the first holes. In the second filter section of the second body, among the cleaning water and residues flowing through the second filter section, the cleaning water flows through each of the second holes, while residues larger than the second holes cannot pass through each of the second holes and are collected in each of the second holes. The cleaning water and residues flowing through each of the second holes flow to the outside of the second filter section toward the gap. As a result, in the third filter section of the third body, among the cleaning water and residues flowing through the gap, the cleaning water flows through each of the third holes, while residues larger than the third holes, i.e., residues smaller than the second holes and larger than the third holes, cannot pass through each of the third holes and are collected in each of the third holes. In this way, in this dishwasher, residue can be suitably collected by the first to third holes, and therefore the first to third filter sections, so that residue is unlikely to be contained in the wash water flowing through the supply passage and the drain passage.

[0014] In addition, in this dishwasher, the first body, the second body or the third body has a communication hole formed therein, which communicates with the gap from above and allows wash water to flow from above to below through the gap. Therefore, even if residue collected in the third hole adheres to the third filter section, such residue can be suitably removed from the third filter section by wash water flowing from the communication hole into the gap. As a result, in this dishwasher, each third hole is less likely to be clogged with residue, and the flow of wash water toward the water supply passage and the drain passage is less likely to be impeded.

[0015] Therefore, the dishwasher of the present invention has excellent residue collection performance, as well as excellent washing and drainage performance.

[0016] There may be a plurality of communication holes. Each communication hole preferably has an opening area larger than each of the first holes and each of the third holes. In this case, it is easier to ensure the flow rate of cleaning water flowing through each communication hole, so that the cleaning water flowing into the gap from each communication hole can more effectively remove residue from the third filter section.

[0017] The second body preferably has a guide portion formed inside the second filter portion and capable of guiding the cleaning water and residue flowing through the second filter portion toward each of the second holes.

[0018] In this case, the wash water flowing through the second filter part can be preferably directed toward each of the second holes. Also, the residue flowing through the second filter part can be preferably collected in each of the second holes and further in the third hole of the third body.

[0019] The second body and the third body may be detachable. The third body is preferably located below the first body when assembled to the second body. In this case, the second filter section and the third filter section can be easily positioned by assembling the second body and the third body.

[0020] The second body may have a flange portion connected to the second filter portion and covering the gap from above, and the communication hole is preferably formed in the flange portion.

[0021] In this case, the communication hole can be easily formed in the second body. Also, the flange can prevent residue from entering the gap from above. Effect of the Invention

[0022] The dishwasher of the present invention has excellent residue collection performance, and is also excellent in cleaning performance and drainage performance. [Brief description of the drawings]

[0023] [Figure 1] FIG. 1 is a cross-sectional view of a dishwasher according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of the dishwasher according to the embodiment. [Diagram 3] FIG. 3 is a right side view of the washing tank of the dishwasher according to the embodiment, showing the treatment agent supply passage, the treatment agent supply device, etc. FIG. [Figure 4] FIG. 4 is a perspective view showing a filter unit and the like in the dishwasher of the embodiment. [Diagram 5] FIG. 5 is a cross-sectional view taken along line AA in FIG. 4, showing the filter unit, the drain pump, etc., of the dishwasher of the embodiment. [Figure 6] FIG. 6 is a cross-sectional view taken along line BB of FIG. 4, showing the filter unit, the water reservoir case, the water supply pump, etc., of the dishwasher of the embodiment. [Figure 7] FIG. 7 is an exploded perspective view of a filter unit in the dishwasher according to the embodiment. [Figure 8] FIG. 8 is an enlarged cross-sectional view of a main part of FIG. 6 showing the first body, the second body and the third body of the dishwasher of the embodiment. [Figure 9] FIG. 9 is a plan view of the second body of the dishwasher according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0025] The dishwasher of the embodiment includes a housing 1, a washing tank 3, a lid 5, a treatment agent supply device 9, a treatment agent supply passage 11, a filter unit 29, a storage tank 7, a first dish basket 13, a second dish basket 14, a third dish basket 15, an operation unit 19, and a control unit 21, as shown in Figs. 1 to 4. The dishwasher also includes a supply passage 6, a drain passage 8, a water supply pump 43, and a drain pump 45, as shown in Figs. 5 and 6. The dishwasher is incorporated in a system kitchen (not shown). For ease of explanation, the lid 5 and the first dish basket 13 are not shown in Fig. 2, and the housing 1 and the lid 5 are not shown in Fig. 3.

[0026] In this embodiment, the front-rear direction and the up-down direction of the dishwasher are defined by the arrows shown in Figures 1 and 2. In Figure 2, the right-left direction of the dishwasher, i.e., the width direction, is defined based on the position of a user (not shown) of the dishwasher facing the dishwasher from the front, with the right side of the user being the right side of the dishwasher and the left side of the user being the left side of the dishwasher. These front-rear direction, up-down direction and left-right direction are mutually perpendicular. In Figure 3 and subsequent figures, the front-rear direction, up-down direction and left-right direction of the dishwasher are defined in accordance with Figures 1 and 2.

[0027] As shown in Figures 1 and 2, the housing 1 has a right panel 1a, a left panel 1b, a front lower panel 1c, a rear lower panel 1d, a bottom panel 1e, and a housing opening 1f. The right panel 1a and the left panel 1b are each formed in a substantially rectangular plate shape extending in the front-rear direction and the up-down direction. The right panel 1a and the left panel 1b are disposed separately from each other in the left-right direction. As a result, the right panel 1a constitutes the right side surface of the housing 1, and the left panel 1b constitutes the left side surface of the housing 1.

[0028] The front lower panel 1c and the rear lower panel 1d are formed in a substantially rectangular plate shape extending in the vertical and horizontal directions. The front lower panel 1c and the rear lower panel 1d are attached to the right panel 1a and the left panel 1b, respectively, and are disposed between the right panel 1a and the left panel 1b. More specifically, the front lower panel 1c is disposed between the right panel 1a and the left panel 1b, and is disposed at the front lower part of the right panel 1a and the left panel 1b. On the other hand, the rear lower panel 1d is disposed between the right panel 1a and the left panel 1b, and is disposed at the rear lower part of the right panel 1a and the left panel 1b. In other words, the front lower panel 1c and the rear lower panel 1d are disposed between the right panel 1a and the left panel 1b, separated from each other in the front-rear direction.

[0029] The bottom panel 1e is formed in a generally rectangular plate shape extending in the front-rear and left-right directions. The bottom panel 1e is disposed at the bottom of the housing 1, and is attached to the bottom ends of the right side panel 1a, the left side panel 1b, the front lower panel 1c, and the rear lower panel 1d. The right side panel 1a, the left side panel 1b, the front lower panel 1c, the rear lower panel 1d, and the bottom panel 1e form an accommodation space 10 in the lower part of the housing 1.

[0030] The housing opening 1f is formed between the right panel 1a, the left panel 1b, and the lower front panel 1c. As a result, the housing opening 1f is located above the storage space 10 and opens toward the front of the housing 1.

[0031] As shown in Fig. 2, the cleaning tank 3 has a right side wall 3a, a left side wall 3b, a rear wall 3c, an upper wall 3d, a lower wall 3e, and a tank opening 3f. The right side wall 3a forms the right side of the cleaning tank 3 and extends in the front-rear and up-down directions. The left side wall 3b forms the left side of the cleaning tank 3 and extends in the front-rear and up-down directions. The right side wall 3a and the left side wall 3b face each other in the left-right direction.

[0032] The rear wall 3c constitutes the rear surface of the cleaning tank 3 and extends in the left-right and up-down directions. The rear wall 3c is disposed between the right side wall 3a and the left side wall 3b, and is connected to the rear ends of the right side wall 3a and the left side wall 3b. The upper wall 3d constitutes the upper surface of the cleaning tank 3 and extends in the left-right and front-rear directions. The upper wall 3d is disposed between the right side wall 3a, the left side wall 3b, and the rear wall 3c, and is connected to the upper ends of the right side wall 3a, the left side wall 3b, and the rear wall 3c. The lower wall 3e constitutes the lower surface of the cleaning tank 3 and extends in the left-right and front-rear directions. The lower wall 3e is disposed between the right side wall 3a, the left side wall 3b, and the rear wall 3c, and is connected to the lower ends of the right side wall 3a, the left side wall 3b, and the rear wall 3c. As a result, the upper wall 3d and the lower wall 3e face each other in the up-down direction.

[0033] As shown in FIG. 1, a water storage section 23 is formed in the lower wall 3e. More specifically, the water storage section 23 is formed by recessing a portion of the lower wall 3e that is approximately in the center in the front-rear and left-right directions downward. Cleaning water is stored in the water storage section 23. As shown in FIG. 5 and FIG. 6, a communication port 23a is formed in the lower wall 3e at a portion that is in the center of the water storage section 23. The communication port 23a penetrates the lower wall 3e in the up-down direction. The communication port 23a is connected to the lower portion of the water storage section 23, and communicates the water storage section 23 with the outside of the cleaning tank 3 below the cleaning tank 3. The cleaning water will be described in detail later.

[0034] 1 and 2, the tank opening 3f is located at the front end of the cleaning tank 3. The tank opening 3f opens toward the front of the cleaning tank 3, and connects the inside and outside of the cleaning tank 3 in the front-rear direction. The right side wall 3a, the left side wall 3b, the rear wall 3c, the upper wall 3d, the lower wall 3e, and the tank opening 3f form the cleaning tank 3 into a substantially rectangular box shape that is open at the front.

[0035] As shown in Fig. 2, a first lower guide member 111, a first middle guide member 112, and a first upper guide member 113 are attached to the right side wall 3a. The first lower guide member 111 is attached to a lower part of the right side wall 3a. The first middle guide member 112 is attached to the right side wall 3a at a position spaced above the first lower guide member 111. The first upper guide member 113 is attached to the right side wall 3a at a position spaced above the first middle guide member 112. The first lower guide member 111, the first middle guide member 112, and the first upper guide member 113 each extend parallel to the front-rear direction along the right side wall 3a.

[0036] On the other hand, a second lower tier guide member 114, a second middle tier guide member 115, and a second upper tier guide member 116 are attached to the left side wall 3b. The second lower tier guide member 114 is attached to the left side wall 3b so as to be at the same height as the first lower tier guide member 111. The second middle tier guide member 115 is attached to the left side wall 3b so as to be at the same height as the first middle tier guide member 112. The second upper tier guide member 116 is attached to the left side wall 3b so as to be at the same height as the first upper tier guide member 113. The second lower tier guide member 114, the second middle tier guide member 115, and the second upper tier guide member 116 extend in the front-rear direction along the left side wall 3b and parallel to the first lower tier guide member 111, the first middle tier guide member 112, and the first upper tier guide member 113, respectively.

[0037] Thus, inside the cleaning tank 3, the first and second lower guide members 111, 114 face each other in the left-right direction, the first and second middle guide members 112, 115 face each other in the left-right direction, and the first and second upper guide members 113, 116 face each other in the left-right direction.

[0038] The cleaning tank 3 is disposed inside the housing 1 by being fixed to the right panel 1a and the left panel 1b of the housing 1, and is located above the storage space 10 shown in Fig. 1. The cleaning tank 3 has a tank opening 3f located inside the housing opening 1f of the housing 1 and facing forward.

[0039] As shown in Fig. 1, the cover 5 has an outer panel 5a and an inner panel 5b. The outer panel 5a is formed of a plate material extending in the vertical and horizontal directions. A grip part 5c is fixed to the upper part of the outer panel 5a. The inner panel 5b is fixed to the rear of the outer panel 5a.

[0040] The cover 5 is attached to the front of the housing 1 by a hinge mechanism 51 and a damper mechanism (not shown) provided in the accommodation space 10. This allows the cover 5 to swing in the front-rear direction around a swing axis O relative to the housing 1. The swing axis O extends linearly in the left-right direction of the housing 1.

[0041] The cover 5 is displaced to the closed position shown by the solid line in Fig. 1 by swinging backward around the swing axis O. The cover 5 is displaced to the closed position, and closes the housing opening 1f and the tank opening 3f from the front. The cover 5 displaced to the closed position forms a cleaning space 100 together with the cleaning tank 3. That is, the cleaning space 100 is formed between the right side wall 3a, the left side wall 3b, the rear wall 3c, the upper wall 3d and the lower wall 3e of the cleaning tank 3 and the inner panel 5b of the cover 5. The water storage section 23 is located below the cleaning space 100 and communicates with the cleaning space 100.

[0042] Meanwhile, the lid 5 swings forward around the swing axis O and is displaced to the open position shown by the imaginary line in Fig. 1. When the lid 5 is displaced to the open position, it opens the housing opening 1f and the tub opening 3f forward. In this dishwasher, even if the lid 5 is displaced to the open position, the washing tub 3 does not move forward or backward relative to the housing 1 and remains positioned within the housing 1.

[0043] 3, the treatment agent supplying device 9 is attached to a lower part of the right side wall 3a of the cleaning tank 3, and is located between the right side wall 3a and the right panel 1a of the housing 1. As a result, the treatment agent supplying device 9 is disposed outside the cleaning tank 3, and therefore outside the cleaning space 100.

[0044] The treatment agent supplying device 9 has a supplying device main body 9a and a treatment agent supplying port 9b. A pump (not shown) is provided inside the supplying device main body 9a. The supplying device main body 9a is electrically connected to the control unit 21 shown in FIG.

[0045] The treatment agent supply port 9b is located rearward of the supply device main body 9a and is connected to the supply device main body 9a. The treatment agent supply port 9b faces the inside of the cleaning space 100 by being fixed to the lower part of the right side wall 3a.

[0046] The treatment agent supply passage 11 has a supply passage main body 34 and a supply passage side connection part 35. The supply passage main body 34 is located between the right side wall 3a and the right side panel 1a, and extends in the vertical direction. The treatment agent can flow through the supply passage main body 34. The supply passage main body 34 has a lower end serving as an apparatus connection part 34a. The supply passage main body 34 is connected to a supply device main body 9a of the treatment agent supply device 9 through the apparatus connection part 34a.

[0047] The supply path side connection part 35 is connected to the upper end of the supply path main body 34. In addition, the supply path side connection part 35 is fixed to the right side wall 3a. As a result, the supply path side connection part 35 is connected to the supply path main body 34 and faces the inside of the cleaning space 100.

[0048] As shown in FIG. 1, in this dishwasher, washing tub 3 is provided with a water storage case 25, a water distributor 26, a water supply duct 27, an air circulation device 28, and a locking device 50.

[0049] 5 and 6, the water reservoir case 25 is formed in a generally cylindrical shape with an open top and a bottom. The water reservoir case 25 is disposed within the accommodation space 10, and is located below the cleaning tank 3. The water reservoir case 25 has its own top end fixed to the bottom wall 3e, and communicates with the water storage section 23 from below via the communication port 23a. As a result, cleaning water is stored in the water reservoir case 25 as well as in the water storage section 23.

[0050] Further, a first connection port 251 shown in Fig. 5 and a second connection port 252 shown in Fig. 6 are formed in the lower part of the water reservoir case 25. The first connection port 251 and the second connection port 252 are located at different positions from each other in the circumferential direction of the water reservoir case 25.

[0051] As shown in Fig. 5, the water reservoir case 25 is formed with a connecting tube portion 25a. As shown in Fig. 1, the connecting tube portion 25a extends into the inside of the cleaning tank 3 through the water storage portion 23. As shown in Fig. 5, the connecting tube portion 25a is formed in a cylindrical shape extending in the vertical direction, and its lower end is connected to the water distributor 26. As shown in Figs. 1 and 2, a first jet nozzle 31 is rotatably attached to the upper end of the connecting tube portion 25a. As a result, the first jet nozzle 31 is disposed in the cleaning space 100 and is rotatable within the cleaning space 100. The first jet nozzle 31 is formed with a plurality of jet portions 300.

[0052] 5, water supply hose 41 is connected to water reservoir case 25, and supply passage 6 is also provided. One end of water supply hose 41 is connected to water reservoir case 25. The other end of water supply hose 41 extends to the outside of housing 1 and is connected to a water supply source (not shown) provided outside the dishwasher. In this way, water supply hose 41 connects water reservoir case 25 and the water supply source. In addition, water supply hose 41 is provided with a water supply solenoid valve (not shown).

[0053] The supply passage 6 is formed integrally with the water reservoir case 25 at a position different from the connection point between the water supply hose 41 and the water reservoir case 25, and extends from the water reservoir case 25 towards the rear right. The supply passage 6 communicates with the interior of the water reservoir case 25 through the first connection port 251. Therefore, the supply passage 6 communicates with the water storage section 23 through the water reservoir case 25. The supply passage 6 is also connected to the water supply pump 43 on the side opposite the water reservoir case 25. In this way, the supply passage 6 connects the water reservoir case 25 and the water supply pump 43.

[0054] As shown in FIG. 6, a drainage channel 8 is provided in the water reservoir case 25. The drainage channel 8 is formed integrally with the water reservoir case 25 at a location different from the connection point between the water supply hose 41 and the water reservoir case 25 and from the supply channel 6. The drainage channel 8 communicates with the interior of the water reservoir case 25 through the second connection port 252. Therefore, the supply channel 6 also communicates with the water storage section 23 through the water reservoir case 25. The drainage channel 8 is also formed with a hose connection portion 8a. One end of the drainage hose 47 shown in FIG. 1 is connected to the hose connection portion 8a.

[0055] Drain hose 47 extends from hose connection portion 8a to the outside of housing 1. The other end of drain hose 47 is connected to a drain outlet (not shown) provided on the outside of the dishwasher. Thus, drain hose 47 connects water reservoir case 25 to the drain outlet through drainage path 8. Drain hose 47 is also provided with a drain solenoid valve (not shown).

[0056] 5, the water distributor 26 is disposed in the accommodation space 10, and is attached to the water storage case 25. The water distributor 26 is fixed to the bottom wall 3e of the washing tub 3 together with the water storage case 25.

[0057] As shown in Figures 1 and 2, the water supply duct 27 is disposed in the cleaning space 100. Cleansing water can flow through the water supply duct 27. The water supply duct 27 is composed of a first duct 27a, a second duct 27b, a third duct 27c, and a branch duct 27d. The first duct 27a is located above the lower wall 3e and extends in the front-rear direction. The front end of the first duct 27a is connected to the water distributor 26 at a position different from the connecting tube portion 25a.

[0058] The second duct 27b is fixed to the rear wall 3c and extends in the up-down direction along the rear wall 3c. The lower end of the second duct 27b is connected to the rear end of the first duct 27a. The third duct 27c extends in the front-rear direction along the upper wall 3d. The rear end of the third duct 27c is connected to the upper end of the first duct 27a. The branch duct 27d is connected to the second duct 27b at a location that is approximately the center of the second duct 27b in the up-down direction, and extends forward from the second duct 27b.

[0059] In addition, the second injection nozzle 32 is rotatably connected to the front end of the branch duct 27d, and the third injection nozzle 33 is rotatably connected to the front end of the third duct 27c. In this case, the second injection nozzle 32 and the third injection nozzle 33 are connected to the front end of the branch duct 27d and the front end of the third duct 27c from below, respectively. In addition, similar to the first injection nozzle 31, the second and third injection nozzles 32 and 33 are also formed with a plurality of injection parts 300.

[0060] The air circulation device 28 is composed of a ventilation section 37, an air duct 28a shown in Figures 1 and 3, a connecting hose 28b shown in Figure 3, an air supply fan 28c shown in Figure 1, and an air supply section 28d shown in Figure 2.

[0061] As shown in Fig. 1, the ventilation part 37 is fixed to the right side wall 3a of the cleaning tank 3. The ventilation part 37 is disposed on the right side wall 3a at a distance above and rearward of the supply path side connection part 35. A plurality of ventilation holes 37a are formed in the ventilation part 37. Each ventilation hole 37a penetrates the ventilation part 37 in the left-right direction.

[0062] As shown in FIG. 3, the ventilation duct 28a is attached to the right side wall 3a of the cleaning tank 3 and is located between the right side wall 3a and the right panel 1a of the housing 1. In other words, the ventilation duct 28a is located outside the cleaning space 100. The ventilation duct 28a is connected to the ventilation section 37. As a result, the ventilation duct 28a communicates with each ventilation port 37a of the ventilation section 37, and thereby communicates with the inside of the cleaning space 100. The ventilation duct 28a extends from the connection point with the ventilation section 37 while curving upward toward the rear, and then extends linearly downward from the right side wall 3a. Air can flow inside the ventilation duct 28a.

[0063] Connection hose 28b is disposed within accommodation space 10. Connection hose 28b is connected to the lower end of ventilation duct 28a and extends leftward within accommodation space 10. As shown in FIG. 1, intake fan 28c is disposed within accommodation space 10. Although detailed illustration is omitted, intake fan 28c has a housing and a fan body provided within the housing. Intake fan 28c is connected to connection hose 28b on the opposite side to ventilation duct 28a. In addition, intake fan 28c is electrically connected to control unit 21.

[0064] The air supply unit 28d shown in FIG. 2 is connected to the air supply fan 28c and is inserted through the lower wall 3e of the cleaning tank 3, and extends into the cleaning space 100.

[0065] The locking device 50 is fixed to the upper wall 3d of the cleaning tank 3. As a result, the locking device 50 is located above the tank opening 3f and approximately in the center in the left-right direction of the cleaning tank 3. The locking device 50 locks the lid body 5 that has been displaced to the closed position, thereby holding the lid body 5 in the closed position.

[0066] 5, the water supply pump 43 is electrically connected to the control unit 21. The water supply pump 43 is connected to the water distributor 26 at a position different from the supply line 6.

[0067] 6, the drain pump 45 is electrically connected to the control unit 21. As described above, the drain pump 45 is attached to the water reservoir case 25. This connects the drain pump 45 to the drainage channel 8.

[0068] As shown in FIGS. 4 to 7, the filter unit 29 is made up of a first body 61, a second body 62, a third body 63, and a fourth body 64.

[0069] As shown in FIG. 7, the first body 61 is formed in a substantially rectangular plate shape in a plan view. The first body 61 is made of metal. The first body 61 has a first filter portion 61a, an insertion hole 61b, and a plurality of communication holes 61c. The first filter portion 61a occupies almost the entire area of ​​the first body 61. The first filter portion 61a has a plurality of first holes 610 formed therein. Each of the first holes 610 has a circular hole shape. Each of the first holes 610 is distributed over almost the entire area of ​​the first filter portion 61a, i.e., over almost the entire area of ​​the first body 61 except for the insertion hole 61b and each communication hole 61c, and penetrates the first filter portion 61a in the vertical direction.

[0070] The insertion hole 61b and each communication hole 61c are formed in the first filter portion 61a and penetrate the first filter portion 61a in the up-down direction. Each communication hole 61c is disposed outside the insertion hole 61b. Each communication hole 61c is disposed at equal intervals in the circumferential direction of the insertion hole 61b and surrounds the insertion hole 61b from the outside. The first body 61 can be formed of a so-called punching metal in which a plurality of through holes corresponding to the first hole 610 are formed. The first body 61 may also be made of resin.

[0071] 5 to 8, the second body 62 is made of resin. The second body 62 is composed of a second filter portion 62a, a first guide portion 62b, a second guide portion 62c, a flange portion 62d, and an extension portion 62e.

[0072] As shown in Fig. 8, the second filter portion 62a is formed in a cylindrical shape extending in the vertical direction, and is capable of being inserted into the insertion hole 61b of the first body 61. The second filter portion 62a is formed with a plurality of second holes 620, two locking pieces 621, and an engagement rib 622. Note that, in Fig. 8, for ease of explanation, the water reservoir case 25 and the like are not shown, and some of the first holes 610 are not shown.

[0073] Each of the second holes 620 is formed on the outer peripheral surface of the second filter portion 62a, and extends in the circumferential direction of the second filter portion 62a while being disposed in the up-down direction of the second filter portion 62a. Each of the second holes 620 penetrates the second filter portion 62a in the radial direction. That is, the second holes 620 have a substantially rectangular elongated hole shape extending in the circumferential direction of the second filter portion 62a. In addition, since each of the second holes 620 is spaced apart from each other in the up-down direction and the circumferential direction of the second filter portion 62a, the second holes 620 are not connected to each other.

[0074] Each of the locking pieces 621 is formed on the outer circumferential surface of the second filter portion 62a and is disposed on the upper portion of the second filter portion 62a. Each of the locking pieces 621 protrudes from the outer circumferential surface of the second filter portion 62a toward the outside of the second filter portion 62a. The locking pieces 621 are disposed at equal intervals in the circumferential direction of the second filter portion 62a. The engagement rib 622 is disposed on the lower portion of the second filter portion 62a. The engagement rib 622 goes around the circumferential direction of the second filter portion 62a while protruding toward the outside of the second filter portion 62a.

[0075] As shown in Fig. 5, the first guide portion 62b and the second guide portion 62c are formed on the inside of the second filter portion 62a. The first guide portion 62b is disposed above the second guide portion 62c. The first guide portion 62b and the second guide portion 62c extend at an incline in the up-down direction of the second filter portion 62a so as to guide the cleaning water and residue flowing inside the second filter portion 62a toward each of the second holes 620. One of the first guide portion 62b and the second guide portion 62c may be omitted, or a guide portion may be formed on the inside of the second filter portion 62a in addition to the first guide portion 62b and the second guide portion 62c.

[0076] As shown in Fig. 8, the flange portion 62d is integral with the upper end of the second filter portion 62a. The flange portion 62d is formed to have a larger diameter than the second filter portion 62a. As shown in Fig. 9, the flange portion 62d is formed with one first communication hole 623 and a plurality of second communication holes 624. Each of the second communication holes 624 is an example of the "communication hole" according to the present invention.

[0077] The first communication hole 623 is located at the center of the flange portion 62d. The first communication hole 623 passes through the flange portion 62d in the up-down direction and communicates with the second filter portion 62a. Since the first communication hole 623 is formed in the flange portion 62d in this manner, the flange portion 62d has a circular ring shape with a larger diameter than the second filter portion 62a.

[0078] Each of the second communication holes 624 is formed with a smaller diameter than the first communication holes 623, and each penetrates the flange portion 62d in the up-down direction. Each of the second communication holes 624 is disposed at a location that is outside the first communication hole 623 and outside the second filter portion 62a. The second communication holes 624 are disposed at equal intervals in the circumferential direction of the first communication hole 623, and surround the first communication hole 623 from the outside. The number of second communication holes 624 can be designed as appropriate.

[0079] The extension portion 62e is integral with the outer circumferential edge of the flange portion 62d, and extends upward from the flange portion 62d while surrounding the flange portion 62d.

[0080] As shown in Figs. 7 and 8, the third body 63 is composed of a third filter portion 63a and a frame portion 63b. The third filter portion 63a is formed by processing a metal plate material into a cylindrical shape. More specifically, the third filter portion 63a has a cylindrical shape with a larger diameter than the second filter portion 62a of the second body 62. The third filter portion 63a has a plurality of third holes 630. Each of the third holes 630 has a round hole shape. Each of the third holes 630 is distributed over almost the entire area of ​​the third filter portion 63a and penetrates the third filter portion 63a in the radial direction. The third filter portion 63a can also be formed by punching metal in which a plurality of through holes corresponding to the third holes 630 are formed. The third filter portion 63a may also be made of resin.

[0081] The frame portion 63b is made of resin and is formed in a generally cylindrical frame shape extending in the vertical direction. The frame portion 63b is also formed to have a larger diameter than the second filter portion 62a. The third filter portion 63a is assembled to the frame portion 63b. In this way, the frame portion 63b holds the third filter portion 63a. As shown in FIG. 8, the frame portion 63b is formed with a plurality of engagement claws 631. Each engagement claw 631 protrudes toward the inside of the frame portion 63b. The upper and lower portions of the frame portion 63b are formed in a symmetrical shape.

[0082] As shown in FIG. 7, the fourth body 64 is formed in a substantially rectangular plate shape in a plan view. The fourth body 64 is made of resin. The fourth body 64 has a fourth filter portion 64a, first to third mounting holes 64b to 64d, and first to third screw holes 64e to 64g. The fourth filter portion 64a occupies substantially the entire area of ​​the fourth body 64. The fourth filter portion 64a is formed with a plurality of fourth holes 640 and a support piece 641. Each of the fourth holes 640 has a circular hole shape. Each of the fourth holes 640 is distributed substantially throughout the entire area of ​​the fourth filter portion 64a and penetrates the fourth filter portion 64a in the up-down direction.

[0083] The support piece 641 is formed on the front edge of the fourth filter portion 64a and protrudes forward of the fourth filter portion 64a. The fourth body 64 may be made of metal such as a punched metal.

[0084] The first to third mounting holes 64b to 64d and the first to third screw holes 64e to 64g are respectively formed in the fourth filter portion 64a, and penetrate the fourth filter portion 64a in the up-down direction. The first mounting hole 64b is adapted to receive the connecting tube portion 25a of the water reservoir case 25. The second and third mounting holes 64c, 64d are adapted to receive the first duct 27a. The first to third screw holes 64e to 64g are adapted to receive the first to third mounting screws 65a to 65c shown in FIG. 4, respectively.

[0085] 7, in the filter unit 29, the opening area of ​​each first hole 610 of the first filter portion 61a, the opening area of ​​each third hole 630 of the third filter portion 63a, and the opening area of ​​each fourth hole 640 of the fourth filter portion 64a are all equal. Specifically, the inner diameter of each of the first holes 610, the third holes 630, and the fourth holes 640 is set to about 2 mm.

[0086] On the other hand, the opening area of ​​each second hole 620 of the second filter portion 62a is larger than the opening area of ​​each first hole 610, each third hole 630, and each fourth hole 640. Furthermore, the opening area of ​​each second communication hole 624 and each communication hole 61c is also larger than the opening area of ​​each first hole 610, each third hole 630, and each fourth hole 640. Note that the opening areas of each first hole 610, each third hole 630, and each fourth hole 640 may differ from each other as long as they are smaller than the opening area of ​​each second hole 620. Furthermore, the opening area of ​​the second communication hole 624 and the opening area of ​​each communication hole 61c of the first body 61 may be the same or different from each other.

[0087] As shown in Fig. 5, Fig. 6 and Fig. 8, in this dishwasher, filter unit 29 is arranged throughout washing space 100, water storage section 23 and water pool case 25. When arranging filter unit 29, first, as shown in Fig. 4, in filter unit 29, connecting tube section 25a of water pool case 25 is inserted into first mounting hole 64b of fourth body 64, and first duct 27a is attached to second and third mounting holes 64c and 64d. Then, in this state, fourth body 64 is fixed to bottom wall 3e of washing tub 3 by first to third mounting screws 65a to 65c. At this time, second and third mounting screws 65b and 65c fix fourth body 64 together with first duct 27a to bottom wall 3e.

[0088] Next, in the filter unit 29, the third body 63 is disposed below the first body 61 as shown in Figs. 5 to 8. In this state, the second filter portion 62a of the second body 62 is inserted from above into the insertion hole 61b of the first body 61 as shown in Fig. 7. As a result, as shown in Fig. 8, the second filter portion 62a enters the third body 63, that is, into the inside of the third filter portion 63a and the frame portion 63b. In addition, in the second filter portion 62a, each of the locking pieces 621 engages with the outer periphery of the insertion hole 61b. As a result, the first body 61 and the second body 62 are assembled. At this time, each of the communication holes 61c of the first body 61 communicates with each of the second communication holes 624 from below.

[0089] Furthermore, in the second filter portion 62a, the engagement rib 622 engages with the engagement claw 631 of the third body 63. As a result, the second body 62 and the third body 63 are assembled together, and the third body 63 is positioned below the first body 61 in a state where it is assembled to the second body 62. In this way, the second body 62 is assembled to the first body 61 and the third body 63, whereby the first to third bodies 61 to 63 are assembled together.

[0090] 5 and 6, the first body 61 is placed on the bottom wall 3e of the cleaning tank 3 and the support piece 641 of the fourth body 64. As a result, the first body 61 and the fourth body 64 are provided on the bottom wall 3e and cover the water storage section 23 from above. The third body 63 is placed in the water storage case 25 with its upper part protruding into the water storage section 23 from the communication port 23a.

[0091] 5, 6, and 8, in the filter unit 29, the third filter portion 63a is formed in a cylindrical shape with a larger diameter than the second filter portion 62a, so that the second filter portion 62a enters the inside of the third filter portion 63a and the frame portion 63b, and the third filter portion 63a covers the second filter portion 62a from the outside. As a result, a cylindrically extending gap S is formed between the second filter portion 62a and the third filter portion 63a. The second holes 620 of the second filter portion 62a and the third holes 630 of the third filter portion 63a face each other in the radial direction of the second filter portion 62a and the third filter portion 63a through the gap S. The gap S is also connected to the inside of the water reservoir case 25 at the lower end.

[0092] Furthermore, in the second body 62, the flange portion 62d covers the space S from above. Then, each of the second communication holes 624 communicates with the space S from above through each of the communication holes 61c.

[0093] In the filter unit 29, the first body 61 is merely placed on the bottom wall 3e and the fourth body 64, and is not fixed to the bottom wall 3e and the fourth body 64. Furthermore, the first body 61 and the second body 62 are detachable by engaging or disengaging each locking piece 621 of the second filter portion 62a with the outer periphery of the insertion hole 61b of the first body 61. Furthermore, the second body 62 and the third body 63 are detachable by engaging or disengaging the engagement rib 622 of the second filter portion 62a with the engagement claw 631 of the third body 63.

[0094] As a result, in filter unit 29, when first to third bodies 61-63 are assembled together, these first to third bodies 61-63 can be removed together from washing tub 3 and water storage case 25, and the user can wash the first to third bodies 61-63 outside the dishwasher. At this time, the user can also disassemble the first to third bodies 61-63 while washing them, if necessary.

[0095] 1 stores a rinse for tableware as a treatment agent inside the storage tank 7. The treatment agent may be a detergent for tableware or the like.

[0096] The storage tank 7 is attached to the supply path side connection part 35 and the ventilation part 37, and is disposed in the cleaning space 100. Although detailed illustration is omitted, the storage tank 7 is detachable from the supply path side connection part 35 and the ventilation part 37. This makes it possible to take the storage tank 7 out of the cleaning space 100 by removing it from the supply path side connection part 35 and the ventilation part 37. In this way, it is possible to replenish the treatment agent in the storage tank 7 outside the cleaning space 100.

[0097] The storage tank 7 is attached to the supply path side connecting part 35 and the ventilation part 37, and is thereby connected to the treatment agent supplying device 9 through the supply path side connecting part 35 and the supply path main body 34 shown in Fig. 3. In addition, the storage tank 7 is attached to the ventilation part 37, and therefore the inside of the storage tank 7 communicates with the ventilation duct 28a through the ventilation part 37.

[0098] The first dish basket 13, the second dish basket 14, and the third dish basket 15 shown in Fig. 1 are each capable of placing items to be washed (not shown). The first dish basket 13, the second dish basket 14, and the third dish basket 15 are classified according to the type of items to be washed. The first dish basket 13 is designed to mainly hold large items to be washed. Examples of items to be washed include tableware such as plates and bowls, as well as eating and drinking utensils such as chopsticks and cups, and cooking vessels such as pots.

[0099] The first dish basket 13 can be taken in and out of the washing space 100 while being guided in the front-to-rear direction by the first lower tier guide member 111 and the second lower tier guide member 114 shown in Fig. 2, and can be stored in the washing space 100 in a horizontal position in the front-to-rear and left-to-right directions by the first lower tier guide member 111 and the second lower tier guide member 114. Similarly, the second dish basket 14 can be taken in and out of the washing space 100 while being guided in the front-to-rear direction by the first middle tier guide member 112 and the second middle tier guide member 115, and can be stored in the washing space 100 in a horizontal position in the front-to-rear and left-to-right directions by the first middle tier guide member 112 and the second middle tier guide member 115. The third dish basket 15 can be taken in and out of the washing space 100 while being guided in the front-to-back direction by the first upper guide member 113 and the second upper guide member 116, and can be stored in the washing space 100 in a horizontal position in the front-to-back and left-to-right directions by the first upper guide member 113 and the second upper guide member 116.

[0100] The first dish basket 13 has a handle portion 13a and an interference portion 13b. The handle portion 13a is provided at the front portion of the first dish basket 13. The handle portion 13a can be grasped by a user when taking the first dish basket 13 in and out of the washing space 100.

[0101] The interference portion 13b is provided on the right side of the first dish basket 13. Although detailed illustration is omitted, the interference portion 13b extends leftward from the right side of the first dish basket 13 and then extends above the first dish basket 13. When the first dish basket 13 is housed in the washing space 100 with the storage tank 7 disposed therein, the interference portion 13b faces the storage tank 7 from the left side without coming into contact with the storage tank 7 if the storage tank 7 is properly attached to the supply path side connecting portion 35 and the ventilation portion 37. In contrast, when the storage tank 7 is not completely attached to the supply path side connecting portion 35 and the ventilation portion 37, the interference portion 13b interferes with the storage tank 7 when the first dish basket 13 is housed in the washing space 100.

[0102] As shown in FIG. 1, the operation unit 19 is provided on the lid 5 and arranged on the upper part of the inner panel 5b. The operation unit 19 is electrically connected to the control unit 21. The operation unit 19 also has operation buttons and a display (not shown). The operation unit 19 allows the user to operate the dishwasher via the operation buttons. The operation unit 19 also displays the operation time and the like on the display. The operation unit 19 may be arranged on the outer panel 5a.

[0103] The control unit 21 is provided on the cover 5 and is disposed between the outer panel 5a and the inner panel 5b. The control unit 21 controls the operation of the water supply pump 43, the drain pump 45, the water supply solenoid valve, the drain solenoid valve, the air supply fan 28c, and the supply device main body 9a. In this way, the control unit 21 executes a washing operation, a rinsing operation, and a drying operation. The control unit 21 may be disposed within the accommodation space 10.

[0104] In this dishwasher, when washing an object to be washed, the user attaches storage tank 7, in which a treatment agent is stored, to supply channel side connection part 35 and ventilation part 37. In this state, the user places first to third dish baskets 13-15, in which the object to be washed is placed, in washing space 100. Thereafter, the user swings lid body 5 to the closed position and operates operation part 19. As a result, in this dishwasher, control part 21 executes washing operation, rinsing operation and drying operation in that order. Note that control part 21 can also execute only any one of washing operation, rinsing operation and drying operation.

[0105] In the washing operation, the control unit 21 opens the water supply solenoid valve provided on the water supply hose 41 and operates the water supply pump 43. As a result, water from the water supply source is sprayed as washing water from each spraying part 300 of the first spray nozzle 31 through the water supply hose 41, the water supply pump 43, the water distributor 26, and the connecting tube part 25a into the washing space 100. Also, washing water is sprayed from the water distributor 26 through the water supply duct 27 into the washing space 100 from each spraying part 300 of the second and third spray nozzles 32 and 33. Also, in the washing operation, dish detergent is supplied into the washing space 100 by an automatic detergent supplying device (not shown) provided in the washing tub 3. Thus, in the washing operation, the object to be washed is washed with washing water containing detergent. In addition, in the washing operation, a predetermined amount of water is supplied from the water supply source, and the control unit 21 closes the water supply solenoid valve.

[0106] In this way, by washing the object with the wash water in the washing space 100, the residue such as leftover food adhering to the object peels off from the object. As a result, the residue is included in the wash water and flows downward together with the wash water in the washing space 100. In this way, the wash water containing the residue flows through the filter unit 29 and is stored in the water storage section 23 and the water storage case 25, as shown by the solid arrows in Figures 5, 6 and 8.

[0107] More specifically, in the filter unit 29, cleaning water containing residue in the cleaning space 100 flows through the first filter portion 61a of the first body 61, the fourth filter portion 64a of the fourth body 64, or the second filter portion 62a from the extension portion 62e of the second body 62 via the first communicating hole 623.

[0108] Here, in the first filter section 61a, while the cleaning water flows through each of the first holes 610, residues larger than the first holes 610 cannot pass through each of the first holes 610 and are collected in each of the first holes 610. Similarly, in the fourth filter section 64a, while the cleaning water flows through each of the fourth holes 640, residues larger than the fourth holes 640 cannot pass through each of the fourth holes 640 and are collected in each of the fourth holes 640. In this way, the cleaning water that has flowed through the first filter section 61a and the fourth filter section 64a and the residues smaller than the first holes 610 and the fourth holes 640 are stored in the water storage section 23 and the water storage case 25.

[0109] In the second filter portion 62a, the cleaning water and residue flowing therethrough are rectified by the first guide portion 62b and the second guide portion 62c, and flow in the radial direction of the second filter portion 62a toward each of the second holes 620. In the second filter portion 62a, the cleaning water flows through each of the second holes 620, while residue larger than each of the second holes 620 cannot pass through each of the second holes 620 and is collected in each of the second holes 620.

[0110] In this way, the cleaning water and residue smaller than each second hole 620 flow to the outside of the second filter portion 62a toward the gap S and further toward the third filter portion 63a of the third body 63. As a result, in the third filter portion 63a, of the cleaning water and residue that flowed in the gap S, the cleaning water flows through each third hole 630 and flows toward the water reservoir case 25 in the radial direction of the third filter portion 63a. On the other hand, residue larger than each third hole 630, i.e., residue smaller than each second hole 620 and larger than each third hole 630, cannot pass through each third hole 630 and is collected in each third hole 630.

[0111] As a result, the wash water that has flowed through each of the third holes 630 and residues smaller than each of the third holes 630 are stored in the water reservoir case 25. In this dishwasher, the wash water that has passed through the filter unit 29, i.e., the wash water that has passed through each of the first holes 610, each of the fourth holes 640, or each of the third holes 630, flows from the first connection port 251 shown in FIG. 5 through the supply passage 6 toward the water supply pump 43. Then, this wash water is sprayed again into the washing space 100 from each of the spraying parts 300 of the first to third spray nozzles 31 to 33 by the water supply pump 43 through the water distributor 26 and the water supply duct 27. As a result, the washing of the objects to be washed in the washing space 100 continues until the washing time set as the washing operation has elapsed.

[0112] Then, when the cleaning time set for the cleaning operation has elapsed, the control unit 21 opens the drain solenoid valve provided in the drain hose 47 and operates the drain pump 45. The control unit 21 also stops the water supply pump 43.

[0113] This ends the washing operation of the dishwasher. Then, the wash water that has passed through filter unit 29 as described above is discharged to the outside of the dishwasher by circulating through drainage channel 8 and drainage hose 47 from second connection port 252 shown in Fig. 6 by drain pump 45. At this time, the residue that has passed through each of first holes 610, fourth holes 640, or third holes 630 is also inevitably discharged to the outside of the dishwasher together with the wash water.

[0114] Here, since each of the first hole 610, the third hole 630, and the fourth hole 640 is a round hole with an inner diameter of about 2 mm, the amount of residue passing through each of the first hole 610, the third hole 630, and the fourth hole 640 is extremely small. Therefore, the effect of the residue being discharged to the outside of the dishwasher is small.

[0115] In the rinsing operation, the control unit 21 opens the water supply solenoid valve and operates the water supply pump 43. As a result, similar to the washing operation, water from the water supply source is sprayed as washing water from each of the spraying parts 300 of the first to third spray nozzles 31 to 33 into the washing space 100. Also, in the rinsing operation, the control unit 21 operates the supply device main body 9a. As a result, the treatment agent stored in the storage tank 7 flows through the treatment agent supply path 11 to the supply device main body 9a. Then, the treatment agent is automatically supplied from the treatment agent supply port 9b into the washing space 100. In this way, in the rinsing operation, the object to be washed is rinsed with washing water containing the treatment agent.

[0116] When the washing time set for the rinsing operation has elapsed, the control unit 21 discharges the washing water in the washing space 100 to the outside of the dishwasher, in the same manner as in the washing operation. In this way, the rinsing operation ends.

[0117] In the drying operation, the control unit 21 operates the air supply fan 28c. This causes the air in the cleaning space 100 to flow through the ventilation duct 28a from each ventilation port 37a of the ventilation unit 37. The air in the ventilation duct 28a is supplied from the air supply unit 28d to the cleaning space 100 via the connection hose 28b and the air supply fan 28c. In this way, in the drying operation, the object to be cleaned is dried while air circulates between the inside of the cleaning space 100 and the outside of the cleaning space 100, i.e., the outside of the cleaning tank 3. When the cleaning time set for the drying operation has elapsed, the control unit 21 stops the air supply fan 28c. In this way, the drying operation is terminated.

[0118] In this way, in this dishwasher, residue can be suitably collected by first hole 610, second hole 620, third hole 630 and fourth hole 640 of filter unit 29, and ultimately by first to fourth filter parts 61a to 64a. Therefore, in this dishwasher, residue is less likely to be contained in the wash water flowing from water reservoir case 25 through supply path 6, and in the wash water flowing from water reservoir case 25 through drain path 8.

[0119] 5, 6 and 8, in the filter unit 29, a part of the cleaning water in the cleaning space 100 also flows into the gap S by passing from the extension portion 62e of the second body 62 through each of the second communication holes 624 and each of the communication holes 61c of the first body 61. Then, the cleaning water that has passed through each of the second communication holes 624 and each of the communication holes 61c flows from the top to the bottom in the gap S along the second filter portion 62a and the third filter portion 63a. In other words, the cleaning water that flows into the gap S through each of the second communication holes 624 and each of the communication holes 61c flows so as to cross the cleaning water and residue that flows from each of the second holes 620 of the second filter portion 62a toward the gap S.

[0120] There are a plurality of second communication holes 624 and a plurality of communication holes 61c. Furthermore, the opening area of ​​each of the second communication holes 624 and each communication hole 61c is larger than the opening area of ​​each of the first holes 610, each of the third holes 630 and each of the fourth holes 640. Therefore, in this dishwasher, it is possible to appropriately ensure the flow rate of washing water flowing into the space S through each of the second communication holes 624 and each communication hole 61c.

[0121] For these reasons, in this dishwasher, even if residues collected in each third hole 630 adhere to third filter portion 63a, such residues can be suitably removed from third filter portion 63a by wash water that has flowed into gap S via each second communication hole 624 and each communication hole 61c. In other words, in this dishwasher, clogging of each third hole 630 by residues can be suitably prevented while minimizing the number of times that the first to third bodies 61-63 are removed from the washing tub 3 and the water reservoir case 25 to perform the washing operation of the first to third bodies 61-63.

[0122] As a result, in this dishwasher, clogging of each third hole 630 by residues is unlikely to occur, and the flow of washing water toward the supply passage 6 and the drain passage 8 is unlikely to be hindered. Therefore, in this dishwasher, the amount of washing water supplied into the washing space 100 by the water supply pump 43 through the supply passage 6 can be suitably ensured, and the amount of washing water discharged to the outside of the dishwasher by the drain pump 45 through the drain passage 8 can be suitably ensured. Strictly speaking, in this dishwasher, not only the washing water but also the residues smaller than each second communication hole 624 and each communication hole 61c flow together with the washing water into the space S through each second communication hole 624 and each communication hole 61c. Then, the residues that flow through each second communication hole 624 and each communication hole 61c are deposited in the water reservoir case 25 through the space S.

[0123] Therefore, the dishwasher of the embodiment has excellent residue collection performance, and also has excellent cleaning and drainage performance.

[0124] Furthermore, in this dishwasher, the first guide portion 62b and the second guide portion 62c of the second body 62 can straighten the flow of the wash water and residue flowing through the second filter portion 62a and guide them toward each of the second holes 620. Therefore, in this dishwasher, the wash water and residue can flow smoothly through the second filter portion 62a, and the residue can be suitably collected in each of the second holes 620 and further in each of the third holes 630 of the third body 63.

[0125] In addition, in this dishwasher, the first body 61 and the second body 62 are detachable, and the second body 62 and the third body 63 are detachable. This allows the user to handle the first to third bodies 61 to 63 as a whole, and also makes it easy to disassemble the first to third bodies 61 to 63 as necessary.

[0126] Furthermore, by assembling second body 62 and third body 63, it is easy to position second filter portion 62a and third filter portion 63a in this dishwasher. Therefore, in this dishwasher, it is possible to suitably form gap S between second filter portion 62a and third filter portion 63a.

[0127] In addition, in this dishwasher, flange 62d of second body 62 covers gap S from above, making it difficult for residue to enter gap S from above. Also, by forming each second communication hole 624 in flange 62d, it is possible to facilitate the formation of each second communication hole 624 and to suitably connect each second communication hole 624 to gap S from above.

[0128] Although the present invention has been described above with reference to the embodiments, it goes without saying that the present invention is not limited to the above embodiments and can be modified as appropriate without departing from the spirit of the present invention.

[0129] For example, in the dishwasher of the embodiment, filter unit 29 is formed by first to fourth bodies 61 to 64. However, this is not limiting, and fourth body 64 may be omitted, and filter unit 29 may be formed by first to third bodies 61 to 63.

[0130] In the dishwasher of the embodiment, the supply channel 6 and the drain channel 8 are formed integrally with the water reservoir case 25. However, this is not limiting, and the supply channel 6 and the drain channel 8 may be formed separately from the water reservoir case 25, and the supply channel 6 and the drain channel 8 may be connected to the water reservoir case 25.

[0131] In the dishwasher of the embodiment, the water reservoir case 25 may be omitted, and the supply passage 6 and the drain passage 8 may be directly connected to the water storage section 23, respectively.

[0132] In the dishwasher of the embodiment, the first body 61 or the third body 63 may be configured to have a "communication hole" according to the present invention.

[0133] In addition, in the dishwasher of the embodiment, water supply pump 43 and drain pump 45 may be replaced with one pump capable of supplying wash water and draining wash water.

[0134] In the dishwasher of the embodiment, the washing tank 3 may be provided movable relative to the housing 1. [Industrial Applicability]

[0135] The present invention can be used in dishwashers, dishwasher-dryers, kitchen equipment, and the like. [Explanation of symbols]

[0136] 3. Cleaning tank 6…Supply route 8…Drainage channel 23…Water storage section 29...Filter unit 43...Water supply pump (pump) 61…First body 61a...First filter section 62…2nd body 62a...Second filter section 62b…1st guide section (guide section) 62c…Second guide section (guide section) 62d…Tsubabe 63…Third body 63a…Third filter section 100…Cleaning space 610…1st hole 620…Second hole 624…Second communication hole (communication hole) 630…3rd hole S...Void

Claims

1. a cleaning tank having a cleaning space in which an object to be cleaned can be cleaned with cleaning water and a water storage section located below the cleaning space and storing the cleaning water; a filter unit capable of collecting residue contained in the cleaning water while circulating the cleaning water; A pump capable of supplying the cleaning water to the cleaning space; a supply passage communicating with the water storage section and for circulating the cleaning water that has passed through the filter unit to the pump; a discharge passage communicating with the water storage section and discharging the cleaning water that has passed through the filter unit to the outside of the cleaning tank; the filter unit includes a first body that is provided in the cleaning tank and covers the water storage portion from above, a second body that is inserted into the first body, and a third body that is located below the first body, The first body has a first filter portion having a plate shape, the second body has a cylindrical shape extending downwardly beyond the first filter portion and includes a second filter portion through which the cleaning water and the residue can flow, the third body has a cylindrical third filter portion having a larger diameter than the second filter portion and covering the second filter portion from the outside, The first filter section is formed with a plurality of first holes that communicate with the water storage section and allow the cleaning water to flow while collecting the residue that is larger than the first filter section; The second filter portion is formed with a plurality of second holes each having an opening area larger than each of the first holes and capable of collecting the residue larger than the second filter portion while allowing the cleaning water to flow therethrough, The third filter portion is formed with a plurality of third holes each having an opening area smaller than each of the second holes and capable of collecting the residue larger than the third filter portion while allowing the cleaning water to flow therethrough; A cylindrical gap is formed between the second filter portion and the third filter portion, the gap communicating with each of the second holes and each of the third holes. The cleaning water and the residue flowing through each of the second holes flow to the outside of the second filter portion toward the gap, A dishwasher characterized in that the first body, the second body or the third body has a communication hole formed therein that communicates with the gap from above and allows the cleaning water to flow within the gap from above to below.

2. The communication holes are multiple, 2. The dishwasher according to claim 1, wherein the communication holes have an opening area larger than that of the first holes and the third holes.

3. 3. The dishwasher according to claim 1, wherein the second body has a guide portion formed inside the second filter portion and capable of guiding the cleaning water and the residue flowing through the second filter portion toward each of the second holes.

4. The second body and the third body are detachable, 3. The dishwasher according to claim 1, wherein the third body is located below the first body when assembled to the second body.

5. the second body has a flange portion connected to the second filter portion and covering the gap from above, 3. The dishwasher according to claim 1, wherein the communication hole is formed in the flange.

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