Tableware washing machine

Abstract

The invention provides a dishwasher which has excellent residue collection performance and excellent washing performance and drainage performance. A filter unit (29) provided in a dishwasher has a first main body (61), a second main body (62), and a third main body (63). The first through third main bodies (61-63) have first through third filter sections (61a-63a), respectively. A plurality of first holes (610) are formed in the first filter section (61a). A plurality of second holes (620) are formed in the second filter section (62a). A plurality of third holes (630) are formed in the third filter part (63a). A gap (S) communicating with each second hole (620) and each third hole (630) is formed between the second filter part (62a) and the third filter part (63a). A communication hole (624) is formed in the second main body (62), the communication hole (624) communicating with the gap (S) from above and allowing the cleaning water to flow into the gap (S) from above to below.

Description

Technical Field

[0001] The invention relates to a dishwashing machine. Background Art

[0002] Japanese Patent Publication No. 2-152431 discloses a conventional dishwashing machine. The dishwashing machine includes a washing tank, a filter unit, a pump, a supply path, and a discharge path. A washing space and a water storage portion are formed in the washing tank. The washing space accommodates objects to be washed and can use washing water to wash the objects to be washed. The water storage portion is located below the washing space and stores washing water.

[0003] The filter unit allows the washing water to flow and can capture the residue contained in the washing water. The pump can supply the washing water to the washing space. The supply path is connected to the water storage part and allows the washing water passing through the filter unit to flow to the pump. The discharge path is connected to the water storage part and discharges the washing water passing through the filter unit to the outside of the washing tank.

[0004] Specifically, the filter unit includes a first body, a second body and a third body. The first body is arranged in the cleaning tank and covers the water storage part from above. The first body has a first filter part. The second body is inserted into the first body. The second body has a second filter part. The second filter part is formed into a cylindrical shape extending further downward than the first filter part, and the cleaning water and residue can flow inside it. The third body is located below the first body, and the first body is placed on its upper part. The third body has a third filter part. The third filter part is formed into a cylindrical shape with a diameter larger than the second filter part, and covers the second filter part from the outside.

[0005] In addition, a plurality of first holes are formed in the first filter portion. A plurality of second holes having an opening area larger than each of the first holes are formed in the second filter portion. A plurality of third holes having an opening area smaller than each of the second holes are formed in the third filter portion. Furthermore, a gap is formed between the second filter portion and the third filter portion.

[0006] In this dishwashing machine, the objects to be cleaned are cleaned with cleaning water in the cleaning space, so that the residues such as leftovers attached to the objects to be cleaned are peeled off from the objects to be cleaned. As a result, the residues are contained in the cleaning water. And the cleaning water containing the residues flows through the filter unit, that is, the first to third bodies. At this time, in the first filter part of the first body, the cleaning water flows through each first hole, and on the other hand, the residues larger than each first hole are captured by each first hole. In addition, in the second filter part of the second body, the cleaning water flows through each second hole, and on the other hand, the residues larger than each second hole are captured by each second hole. And the cleaning water and residues flowing through each second hole flow toward the gap and to the outside of the second filter part. In the third filter part, the cleaning water and the cleaning water in the residue flowing in the gap flow through each third hole, and on the other hand, the residues larger than each third hole are captured by each third hole.

[0007] The washing water flowing through the filter unit is supplied again to the washing space through the supply path and by means of a pump. In addition, after the washing of the objects to be washed is completed, the washing water flowing through the filter unit is discharged to the outside of the washing tank or even to the outside of the dishwasher through the drainage path. In this way, in the dishwasher, the washing water can be filtered by the filter unit, so that the washing water supplied to the washing space by means of the pump or the washing water discharged to the outside of the dishwasher is unlikely to contain residues.

[0008] However, in the above-mentioned conventional dishwasher, the residues captured by the third filter adhere to the third filter, which makes each third hole easily clogged. Therefore, in the dishwasher, the flow of washing water toward the supply path and the drainage path is easily blocked. As a result, in addition to the washing operation for washing the washed objects, the circulation of washing water is reduced during the rinsing operation for rinsing the washed objects, so the washing performance and drainage performance of the dishwasher are reduced. Summary of the invention

[0009] Therefore, a non-limiting object of the present invention is to provide a dishwasher having excellent residue collection performance, and excellent washing performance and drainage performance. This object is achieved by the invention of claim 1. Further developments of the present invention are described in the dependent claims.

[0010] The dishwasher of the present invention comprises:

[0011] A cleaning tank having a cleaning space for cleaning an object with cleaning water and a water storage portion located below the cleaning space for storing the cleaning water;

[0012] a filtering unit that allows the washing water to flow and can capture residues contained in the washing water;

[0013] a pump capable of supplying the washing water to the washing space;

[0014] a supply path that communicates with the water storage portion and allows the washing water that has passed through the filter unit to flow through the pump; and

[0015] a discharge passage which communicates with the water storage portion and discharges the washing water having passed through the filter unit to the outside of the washing tank,

[0016] The filter unit includes: a first body, which is disposed in the cleaning tank and covers the water storage portion from above; a second body, which is inserted into the first body; and a third body, which is located below the first body.

[0017] The first body has a first filter portion in a plate shape.

[0018] The second body has a second filter portion, which is in a cylindrical shape extending downwardly than the first filter portion, and the washing water and the residue can flow inside the second filter portion.

[0019] The third body has a cylindrical third filter portion, the third filter portion covers the second filter portion from the outside and has a larger diameter than the second filter portion.

[0020] A plurality of first holes are formed in the first filter portion, and the plurality of first holes are connected to the water storage portion, so that the cleaning water can flow and the residue larger than the cleaning water can be captured.

[0021] The second filter portion has a plurality of second holes formed therein, the plurality of second holes being formed to have an opening area larger than that of the first holes, so as to allow the washing water to flow therethrough and to capture the residue larger than the washing water.

[0022] The third filter portion has a plurality of third holes formed therein, the plurality of third holes being formed to have an opening area smaller than that of each of the second holes, so as to allow the washing water to flow therethrough and to capture the residue larger than the washing water.

[0023] A gap is formed between the second filter portion and the third filter portion. The gap is cylindrical and communicates with the second holes and the third holes.

[0024] The washing water and the residue flowing through the second holes flow toward the gap and toward the outside of the second filter portion.

[0025] A communication hole is formed in the first body, the second body, or the third body. The communication hole communicates with the gap from above so that the washing water flows into the gap from above to below.

[0026] In the dishwasher of the present invention, the filter unit has a first body, a second body and a third body. In addition, a gap is formed between the second filter portion of the second body and the third filter portion of the third body, and the gap is connected to each second hole and each third hole.

[0027] Furthermore, in the first filter section of the first body, the washing water flows through each first hole, while on the other hand, the residue larger than each first hole cannot pass through each first hole and is captured by each first hole. In addition, in the second filter section of the second body, the washing water and the residue flowing through the second filter section flow through each second hole, while on the other hand, the residue larger than each second hole cannot pass through each second hole and is captured by each second hole. Furthermore, the washing water and the residue flowing through each second hole flow toward the gap and toward the outside of the second filter section. Thus, in the third filter section of the third body, the washing water and the residue flowing through the gap flow through each third hole, while on the other hand, the residue larger than each third hole, that is, the residue smaller than each second hole and larger than each third hole cannot pass through each third hole and is captured by each third hole. In this way, in the dishwashing machine, the residue can be well captured by using the first to third holes, and even the first to third filter sections, so it is difficult for the residue to be included in the washing water flowing through the supply path and the drainage path.

[0028] In addition, in the dishwasher, a connecting hole is formed in the first body, the second body or the third body, and the connecting hole is connected to the gap from above, and allows the washing water to flow into the gap from above to below. Therefore, in the dishwasher, even if the residue captured by the third hole adheres to the third filter part, the washing water flowing into the gap from the connecting hole can be used to remove the residue from the third filter part. As a result, in the dishwasher, the third holes are unlikely to be blocked by the residue, and the flow of washing water to the water supply path and the drainage path is unlikely to be hindered.

[0029] Therefore, the dishwasher of the present invention has excellent residue collection performance, and also has excellent washing performance and drainage performance.

[0030] In another embodiment of the present invention, there may be a plurality of communicating holes. Furthermore, it is preferred that the opening area of ​​each communicating hole is larger than that of each first hole and each third hole. In this case, it is easy to ensure the flow rate of the cleaning water flowing through each communicating hole, so that the residue can be well removed from the third filter portion by using the cleaning water flowing into the gap from each communicating hole.

[0031] In another aspect of the present invention, preferably, the second body includes a guide portion that is formed inside the second filter portion and can guide the washing water and residue flowing through the second filter portion toward the second holes.

[0032] In this case, the washing water flowing through the second filter portion can be smoothly circulated toward each second hole. In addition, the residue flowing through the second filter portion can be smoothly captured by each second hole and the third hole of the third body.

[0033] In another embodiment of the present invention, the second body and the third body can be assembled and disassembled. In addition, the third body is preferably located below the first body in a state of being assembled to the second body. In this case, the second filter unit and the third filter unit can be easily positioned by assembling the second body and the third body.

[0034] In another aspect of the present invention, the second body may include a flange portion connected to the second filter portion and covering the gap from above. Furthermore, the communication hole is preferably formed in the flange portion.

[0035] In this case, the communicating hole can be easily formed in the second body. In addition, the flange portion can prevent residue from entering the gap from above.

[0036] Other aspects and advantages of the present invention will become apparent from the embodiments disclosed in the following description and the drawings, the diagrams illustrated in the drawings, and the concepts of the present invention disclosed in the specification and the drawings as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a cross-sectional view of the dishwasher of the embodiment.

[0038] Figure 2 It is a perspective view of the dishwasher of the embodiment.

[0039] Figure 3 The dishwasher according to the embodiment is a right side view of a washing tank showing a treatment agent supply path, a treatment agent supply device, and the like.

[0040] Figure 4 The dishwasher according to the embodiment is a perspective view showing a filter unit and the like.

[0041] Figure 5 A dishwasher according to an embodiment of the present invention is a dishwasher showing a filter unit and a drain pump, etc. Figure 4 AA cross-section diagram.

[0042] Figure 6 A dishwasher according to an embodiment of the present invention is a dishwasher showing a filter unit, a water storage tank, a water supply pump, etc. Figure 4 BB cross-section diagram.

[0043] Figure 7 The dishwasher according to the embodiment is an exploded perspective view of a filter unit.

[0044] Figure 8 A dishwasher according to an embodiment of the present invention is provided, which shows a first body, a second body and a third body. Figure 6 An enlarged cross-sectional view of the main part.

[0045] Fig. 9The present invention relates to the dishwasher of the embodiment, which is a top view of the second body.

[0046] Description of Reference Numerals

[0047] 3…cleaning tank, 6…supply path, 8…drainage path, 23…water storage portion, 29…filter unit, 43…water supply pump (pump), 61…first body, 61a…first filter portion, 62…second body, 62a…second filter portion, 62b…first guide portion (guide portion), 62c…second guide portion (guide portion), 62d…flange portion, 63…third body, 63a…third filter portion, 100…cleaning space, 610…first hole, 620…second hole, 624…second communicating hole (communicating hole), 630…third hole, S…gap. DETAILED DESCRIPTION

[0048] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0049] like Figure 1 to Figure 4 As shown, the dishwasher of the embodiment includes a housing 1, a washing tank 3, a cover 5, a treatment agent supply device 9, a treatment agent supply path 11, a filter unit 29, a storage tank 7, a first cutlery basket 13, a second cutlery basket 14, a third cutlery basket 15, an operation unit 19, and a control unit 21. In addition, as shown Figure 5 and Figure 6 As shown, the dishwasher comprises a supply path 6, a drainage path 8, a water supply pump 43 and a drainage pump 45. The dishwasher is assembled in an integrated kitchen which is not shown. Figure 2 The cover 5 and the first cutlery basket 13 are omitted. Figure 3 The housing 1, the cover 5, etc. are omitted in the figure.

[0050] In this embodiment, using Figure 1 and Figure 2 The arrows shown define the front-rear direction and the up-down direction of the dishwasher. Figure 2 In the diagram, the right side of the user (not shown) is set as the right side of the dishwasher and the left side of the user is set as the left side of the dishwasher, with the user's right side being the right side of the dishwasher and the user's left side being the left side, thereby defining the left-right direction, i.e., the width direction, of the dishwasher. The front-to-back direction, the up-down direction, and the left-to-right direction are orthogonal to each other. Figure 3 In the following figures, Figure 1 and Figure 2 The front-rear direction, the up-down direction, and the left-right direction of the dishwasher are defined accordingly.

[0051] like Figure 1 and Figure 2As shown, the housing 1 has a right side panel 1a, a left side panel 1b, a front lower panel 1c, a rear lower panel 1d, a bottom panel 1e and a housing opening 1f. The right side panel 1a and the left side panel 1b are formed into approximately rectangular plates extending in the front-to-back direction and the up-down direction, respectively. The right side panel 1a and the left side panel 1b are respectively configured to be separated in the left-right direction. Thus, the right side panel 1a constitutes the right side of the housing 1, and the left side panel 1b constitutes the left side of the housing 1.

[0052] The front lower panel 1c and the rear lower panel 1d are formed into a substantially rectangular plate extending in the up-down direction and the left-right direction. The front lower panel 1c and the rear lower panel 1d are respectively mounted on the right side panel 1a and the left side panel 1b, and are arranged between the right side panel 1a and the left side panel 1b. More specifically, the front lower panel 1c is arranged between the right side panel 1a and the left side panel 1b, and is arranged at the front lower portion of the right side panel 1a and the left side panel 1b. On the other hand, the rear lower panel 1d is arranged between the right side panel 1a and the left side panel 1b, and is arranged at the rear lower portion of the right side panel 1a and the left side panel 1b. That is, the front lower panel 1c and the rear lower panel 1d are arranged to be separated in the front-back direction between the right side panel 1a and the left side panel 1b.

[0053] The bottom panel 1e is formed in a substantially rectangular plate shape extending in the front-back direction and the left-right direction. The bottom panel 1e is arranged at the bottom of the housing 1 and is attached to the lower 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 a storage space 10 at the bottom of the housing 1.

[0054] The housing opening 1f is formed between the right side panel 1a, the left side panel 1b, and the front lower panel 1c. Thus, the housing opening 1f is located above the storage space 10 and opens toward the front of the housing 1.

[0055] like Figure 2 As shown, 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 constitutes the right side of the cleaning tank 3 and extends in the front-to-back direction and the up-down direction. The left side wall 3b constitutes the left side of the cleaning tank 3 and extends in the front-to-back direction and the up-down direction. The right side wall 3a and the left side wall 3b are opposite in the left-right direction.

[0056] The rear wall 3c constitutes the rear surface of the cleaning tank 3 and extends in the left-right direction and the up-down direction. The rear wall 3c is arranged between the right side wall 3a and the left side wall 3b, and is connected to each rear end 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 direction and the front-back direction. The upper wall 3d is arranged between the right side wall 3a, the left side wall 3b and the rear wall 3c, and is connected to each upper end 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 direction and the front-back direction. The lower wall 3e is arranged between the right side wall 3a, the left side wall 3b and the rear wall 3c, and is connected to each lower end of the right side wall 3a, the left side wall 3b and the rear wall 3c. Thus, the upper wall 3d and the lower wall 3e are opposite in the up-down direction.

[0057] like Figure 1 As shown in FIG. 1 , a water storage portion 23 is formed on the lower wall 3e. More specifically, the water storage portion 23 is formed by making the portion of the lower wall 3e that is substantially the center in the front-back direction and the left-right direction concave downward. Washing water is stored in the water storage portion 23. Figure 5 and Figure 6 As shown, a connection port 23a is formed on the lower wall 3e and at a central portion of the water storage portion 23. The connection port 23a penetrates the lower wall 3e in the up-down direction. The connection port 23a is connected to the lower portion of the water storage portion 23 and communicates the water storage portion 23 with the outside of the washing tank 3 below the washing tank 3. It should be noted that the details of the washing water will be described below.

[0058] like Figure 1 and Figure 2 As shown, the slot opening 3f is located at the front end of the cleaning tank 3. The slot opening 3f is open toward the front of the cleaning tank 3, and the inside and outside of the cleaning tank 3 are connected in the front-to-back direction. The cleaning tank 3 is formed into a nearly rectangular box shape with an opening at the front by the right side wall 3a, the left side wall 3b, the rear wall 3c, the upper wall 3d, the lower wall 3e and the slot opening 3f.

[0059] In addition, if Figure 2 As shown, a first lower guide member 111, a first middle guide member 112, and a first upper guide member 113 are installed on the right side wall 3a. The first lower guide member 111 is installed at the lower part of the right side wall 3a. The first middle guide member 112 is installed on the right side wall 3a at a position further upward than the first lower guide member 111. The first upper guide member 113 is installed on the right side wall 3a at a position further upward than 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 extend parallel to the front-rear direction along the right side wall 3a.

[0060] On the other hand, the second lower guide member 114, the second middle guide member 115, and the second upper guide member 116 are mounted on the left side wall 3b. The second lower guide member 114 is mounted on the left side wall 3b in a manner that is equal to the height of the first lower guide member 111. The second middle guide member 115 is mounted on the left side wall 3b in a manner that is equal to the height of the first middle guide member 112. The second upper guide member 116 is mounted on the left side wall 3b in a manner that is equal to the height of the first upper guide member 113. In addition, the second lower guide member 114, the second middle guide member 115, and the second upper guide member 116 extend in the front-rear direction along the left side wall 3b and in parallel with the first lower guide member 111, the first middle guide member 112, and the first upper guide member 113, respectively.

[0061] Thus, inside the cleaning tank 3, the first and second lower guide members 111, 114 are opposite to each other in the left-right direction, the first and second middle guide members 112, 115 are opposite to each other in the left-right direction, and the first and second upper guide members 113, 116 are opposite to each other in the left-right direction.

[0062] The cleaning tank 3 is fixed to the right side panel 1a and the left side panel 1b of the housing 1 and is disposed in the housing 1. Figure 1 The storage space 10 is shown above. In the cleaning tank 3, the tank opening 3f is located inside the housing opening 1f of the housing 1 and is formed to face forward.

[0063] like Figure 1 As shown, the cover body 5 has an outer panel 5a and an inner panel 5b. The outer panel 5a is formed by a plate extending in the up-down direction and the left-right direction. A gripping portion 5c is fixed to the upper portion of the outer panel 5a. The inner panel 5b is fixed to the rear of the outer panel 5a.

[0064] The cover 5 is mounted on the front of the housing 1 by means of a hinge mechanism 51 and a vibration reduction mechanism (not shown) provided in the storage space 10. Thus, the cover 5 can swing in the front-rear direction about the swing axis O relative to the housing 1. The swing axis O extends linearly in the left-right direction of the housing 1.

[0065] The cover 5 is displaced to the position by swinging backward around the swing axis O. Figure 1The cover 5 is in the closed position shown by the solid line in FIG. The cover 5 is shifted to the closed position to close the housing opening 1f and the slot opening 3f from the front. Moreover, the cover 5 shifted 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 side panel 5b of the cover 5. Moreover, the water storage part 23 is located below the cleaning space 100 and communicates with the cleaning space 100.

[0066] On the other hand, the cover 5 is displaced to the position by swinging forward around the swing axis O. Figure 1 The cover 5 is shifted to the open position so that the housing opening 1f and the slot opening 3f are opened in front. It should be noted that in the dishwasher, even if the cover 5 is shifted to the open position, the washing tank 3 does not move in the front-rear direction relative to the housing 1, but continues to be located in the housing 1.

[0067] like Figure 3 As shown, the treatment agent supply device 9 is installed at the 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 side panel 1a of the housing 1. Therefore, the treatment agent supply device 9 is arranged outside the cleaning tank 3 and even outside the cleaning space 100.

[0068] The treatment agent supply device 9 includes a supply device body 9a and a treatment agent supply port 9b. The supply device body 9a is provided with a pump (not shown) inside. The supply device body 9a is electrically connected to the supply device body 9a. Figure 1 The control unit 21 shown is connected.

[0069] The processing agent supply port 9 b is located behind the supply device body 9 a and connected to the supply device body 9 a. The processing agent supply port 9 b is fixed to the lower portion of the right side wall 3 a and faces the inside of the cleaning space 100 .

[0070] The treatment agent supply path 11 includes a supply path main body 34 and a supply path side connection portion 35. The supply path main body 34 is located between the right side wall 3a and the right side panel 1a, and extends in the up-down direction. The treatment agent can flow inside the supply path main body 34. In addition, the lower end of the supply path main body 34 is set as a device connection portion 34a. The supply path main body 34 is connected to the supply device main body 9a of the treatment agent supply device 9 through the device connection portion 34a.

[0071] 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. Thus, the supply path side connection part 35 is connected to the supply path main body 34 and faces the inside of the washing space 100.

[0072] In addition, if Figure 1As shown, in the dishwasher, a water storage tank 25, a water distributor 26, a water supply channel 27, an air circulation device 28 and a locking device 50 are provided relative to the washing tank 3.

[0073] like Figure 5 and Figure 6 As shown in FIG. 1 , the water storage tank 25 is formed in a substantially cylindrical shape with an open top and a bottom. The water storage tank 25 is disposed in the storage space 10 and is located below the washing tank 3. The water storage tank 25 is connected to the water storage portion 23 from below through the connection port 23a by fixing its upper end to the lower wall 3e. Thus, washing water is stored in both the water storage portion 23 and the water storage tank 25.

[0074] In addition, a water storage tank 25 is formed at the bottom thereof. Figure 5 The first connection port 251 and Figure 6 The first connection port 251 and the second connection port 252 are located at different positions on the circumference of the water storage tank 25.

[0075] In addition, if Figure 5 As shown, a connecting cylinder 25a is formed in the water storage tank 25. Figure 1 As shown, the connecting tube 25a extends to the inside of the cleaning tank 3 via the water storage portion 23. Figure 5 As shown, the connecting cylinder 25a is formed into a cylindrical shape extending in the vertical direction, and the lower end is connected to the water distributor 26. Figure 1 and Figure 2 As shown, the first spray nozzle 31 is rotatably mounted on the upper end of the connecting cylinder 25a. Thus, the first spray nozzle 31 is disposed in the cleaning space 100 and is rotatable in the cleaning space 100. A plurality of spray parts 300 are formed in the first spray nozzle 31.

[0076] In addition, if Figure 5 As shown, a water supply hose 41 is connected to the water storage tank 25, and a supply path 6 is also provided. One end of the water supply hose 41 is connected to the water storage tank 25. In addition, the other end of the water supply hose 41 extends to the outside of the housing 1 and is connected to a water supply source (not shown) provided outside the dishwasher. Thus, the water supply hose 41 connects the water storage tank 25 and the water supply source. In addition, a water supply solenoid valve (not shown) is provided on the water supply hose 41.

[0077] The supply path 6 is formed integrally with the water storage tank 25 at a position different from the connection portion between the water supply hose 41 and the water storage tank 25, and extends to the right rear from the water storage tank 25. The supply path 6 is communicated with the inside of the water storage tank 25 through the first connection port 251. Therefore, the supply path 6 is communicated with the water storage portion 23 through the water storage tank 25. In addition, the supply path 6 is connected to the water supply pump 43 on the opposite side of the water storage tank 25. Thus, the supply path 6 connects the water storage tank 25 and the water supply pump 43.

[0078] In addition, if Figure 6 As shown in FIG. 2 , a drain passage 8 is provided in the water storage tank 25. The drain passage 8 is formed integrally with the water storage tank 25 at a position different from the connection portion between the water supply hose 41 and the water storage tank 25 and the supply passage 6. The drain passage 8 communicates with the interior of the water storage tank 25 through the second connection port 252. Therefore, the supply passage 6 also communicates with the water storage portion 23 through the water storage tank 25. In addition, a hose connection portion 8a is formed in the drain passage 8. Figure 1 One end of the drain hose 47 shown is connected to the hose connecting portion 8a.

[0079] The drain hose 47 extends from the hose connection portion 8a to the outside of the housing 1. The other end of the drain hose 47 is connected to a drain port (not shown) provided outside the dishwasher. Thus, the drain hose 47 connects the water storage tank 25 and the drain port through the drain passage 8. In addition, a drain solenoid valve (not shown) is provided in the drain hose 47.

[0080] like Figure 5 As shown, the water distributor 26 is disposed in the storage space 10 and assembled to the water storage tank 25. The water distributor 26 is fixed to the lower wall 3e of the washing tank 3 together with the water storage tank 25.

[0081] like Figure 1 and Figure 2 As shown, the water supply channel 27 is arranged in the cleaning space 100. Cleaning water can flow inside the water supply channel 27. The water supply channel 27 is composed of a first channel 27a, a second channel 27b, a third channel 27c and a branch channel 27d. The first channel 27a is located above the lower wall 3e and extends in the front-to-back direction. The front end of the first channel 27a is connected to the water distributor 26 at a position different from the connecting cylinder 25a.

[0082] The second channel 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 channel 27b is connected to the rear end of the first channel 27a. The third channel 27c extends in the front-back direction along the upper wall 3d. The rear end of the third channel 27c is connected to the upper end of the first channel 27a. The branch channel 27d is connected to the second channel 27b at a position that is approximately the center of the second channel 27b in the up-down direction, and extends from the second channel 27b toward the front.

[0083] In addition, the second injection nozzle 32 is rotatably connected to the front end of the branch channel 27d, and the third injection nozzle 33 is rotatably connected to the front end of the third channel 27c. At this time, the second injection nozzle 32 and the third injection nozzle 33 are respectively connected to the front end of the branch channel 27d and the front end of the third channel 27c from below. In addition, similarly to the first injection nozzle 31, a plurality of injection parts 300 are formed for the second and third injection nozzles 32 and 33.

[0084] The air circulation device 28 is configured to include a ventilation portion 37, Figure 1 and Figure 3 The ventilation passage 28a shown, Figure 3 The connecting hose 28b shown, Figure 1 The air intake fan 28c shown, and Figure 2 The air supply portion 28d is shown.

[0085] like Figure 1 As shown, the vent 37 is fixed to the right side wall 3a of the washing tank 3. In addition, the vent 37 is arranged to be away from the supply path side connection part 35 on the right side wall 3a upward and backward. A plurality of vents 37a are formed in the vent 37. Each vent 37a penetrates the vent 37 in the left-right direction.

[0086] like Figure 3 As shown, the ventilation channel 28a is installed on the right side wall 3a of the cleaning tank 3 and is located between the right side wall 3a and the right side panel 1a of the housing 1. That is, the ventilation channel 28a is located outside the cleaning space 100. The ventilation channel 28a is connected to the ventilation portion 37. Thus, the ventilation channel 28a is connected to each vent 37a of the ventilation portion 37 and is connected to the inside of the cleaning space 100. The ventilation channel 28a is bent and extended from the connection portion relative to the ventilation portion 37 toward the upper rear portion, and then extends in a straight line toward the bottom of the right side wall 3a. Air can flow inside the ventilation channel 28a.

[0087] The connecting hose 28b is disposed in the storage space 10. The connecting hose 28b is connected to the lower end of the ventilation passage 28a and extends toward the left side in the storage space 10. Figure 1 As shown, the intake fan 28c is arranged in the storage space 10. Although the detailed illustration is omitted, the intake fan 28c has a housing and a fan body arranged in the housing. The intake fan 28c is connected to the connecting hose 28b on the opposite side of the ventilation channel 28a. In addition, the intake fan 28c is connected to the control unit 21 in a manner that can be powered.

[0088] Figure 2The air supply unit 28 d shown is connected to the air intake fan 28 c , is inserted through the lower wall 3 e of the cleaning tank 3 , and extends into the cleaning space 100 .

[0089] The locking device 50 is fixed to the upper wall 3d of the washing tank 3. Thus, the locking device 50 is located above the tank opening 3f and approximately in the left-right center of the washing tank 3. The locking device 50 locks the cover 5 displaced to the closed position and holds the cover 5 in the closed position.

[0090] like Figure 5 As shown, the water supply pump 43 is connected to the control unit 21 in an electrically energizable manner. In addition, the water supply pump 43 is connected to the water distributor 26 at a position different from the supply path 6.

[0091] like Figure 6 As shown in FIG. 1 , the drain pump 45 is connected to the control unit 21 in an electrically energizable manner. In addition, as described above, the drain pump 45 is assembled to the water storage tank 25. Thus, the drain pump 45 is connected to the drain passage 8.

[0092] like Figure 4 to Figure 7 As shown, the filter unit 29 is constructed to include a first body 61 , a second body 62 , a third body 63 and a fourth body 64 .

[0093] like Figure 7 As shown, the first body 61 is formed into a plate-like shape that is approximately rectangular when viewed from above. 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 connection holes 61c. The first filter portion 61a occupies substantially the entire area of ​​the first body 61. A plurality of first holes 610 are formed in the first filter portion 61a. Each first hole 610 is in the shape of a circular hole. Each first hole 610 is distributed over substantially the entire area of ​​the first filter portion 61a, that is, substantially the entire area of ​​the first body 61 except the insertion hole 61b and each connection hole 61c, and penetrates the first filter portion 61a in the up and down direction.

[0094] The insertion hole 61b and each connection hole 61c are formed in the first filter part 61a, and penetrate the first filter part 61a in the up-down direction. In addition, each connection hole 61c is arranged on the outside of the insertion hole 61b. Each connection hole 61c is arranged at equal intervals on the circumference of the insertion hole 61b, and surrounds the insertion hole 61b from the outside. It should be noted that the first body 61 can be formed by a so-called punching metal having a plurality of through holes corresponding to the first hole 610. In addition, the first body 61 can be made of resin.

[0095] like Figures 5 to 8 As shown, the second body 62 is made of resin and includes a second filter portion 62a, a first guide portion 62b, a second guide portion 62c, a flange portion 62d, and a protruding portion 62e.

[0096] like Figure 8 As shown, the second filter portion 62a is formed into a cylindrical shape extending in the vertical direction and can be inserted into the insertion hole 61b of the first body 61. A plurality of second holes 620, two locking pieces 621 and a locking rib 622 are formed in the second filter portion 62a. It should be noted that, Figure 8 In the figure, for ease of explanation, in addition to omitting the illustration of the water storage tank 25 and the like, a part of the illustration of the first hole 610 is also omitted.

[0097] Each second hole 620 is formed on the outer peripheral surface of the second filter portion 62a, and is respectively arranged in the up-down direction of the second filter portion 62a and extends along the circumferential direction of the second filter portion 62a. Each second hole 620 penetrates the second filter portion 62a in the radial direction. That is, the second hole 620 is in the shape of a rectangular long hole extending along the circumferential direction of the second filter portion 62a. In addition, each second hole 620 is separated from each other in the up-down direction and circumferential direction of the second filter portion 62a, and therefore, each second hole 620 is not connected to each other.

[0098] Each of the locking pieces 621 is formed on the outer peripheral surface of the second filter portion 62a and is respectively arranged at the upper part of the second filter portion 62a. Each of the locking pieces 621 protrudes from the outer peripheral surface of the second filter portion 62a toward the outer side of the second filter portion 62a. Each of the locking pieces 621 is arranged at equal intervals on the circumference of the second filter portion 62a. The locking rib 622 is arranged at the lower part of the second filter portion 62a. The locking rib 622 protrudes toward the outer side of the second filter portion 62a and surrounds the circumference of the second filter portion 62a.

[0099] like Figure 5 As shown, the first guide portion 62b and the second guide portion 62c are formed on the inner side of the second filter portion 62a. In addition, the first guide portion 62b is configured to be higher than the second guide portion 62c. The first guide portion 62b and the second guide portion 62c extend obliquely in the upper and lower directions of the second filter portion 62a in such a manner that the washing water and residues flowing inside the second filter portion 62a flow toward each second hole 620. It should be noted that one of the first guide portion 62b and the second guide portion 62c may be omitted, and in addition to the first guide portion 62b and the second guide portion 62c, a guide portion may be formed on the inner side of the second filter portion 62a.

[0100] like Figure 8 As shown in FIG. 1 , the flange portion 62d is formed integrally 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. Fig. 9 As shown in FIG. 6 , the flange portion 62d is formed with one first communication hole 623 and a plurality of second communication holes 624. Each second communication hole 624 is an example of a "communication hole" in the present invention.

[0101] The first connecting hole 623 is located at the center of the flange portion 62d. The first connecting hole 623 penetrates the flange portion 62d in the up-down direction and communicates with the second filter portion 62a. By forming the first connecting hole 623 in the flange portion 62d, the flange portion 62d is formed into a circular ring with a larger diameter than the second filter portion 62a.

[0102] Each second connecting hole 624 is formed to have a smaller diameter than the first connecting hole 623, and penetrates the flange portion 62d in the up-down direction. Each second connecting hole 624 is arranged at a location outside the first connecting hole 623 and outside the second filter portion 62a. Each second connecting hole 624 is arranged at equal intervals on the circumference of the first connecting hole 623, and surrounds the first connecting hole 623 from the outside. It should be noted that the number of second connecting holes 624 can be appropriately designed.

[0103] The extension portion 62e is formed integrally with the outer peripheral edge of the flange portion 62d, surrounds the flange portion 62d, and extends upward from the flange portion 62d.

[0104] like Figure 7 and Figure 8 As shown, the third body 63 is constituted to include a third filter portion 63a and a frame portion 63b. The third filter portion 63a is formed by processing a metal plate into a cylindrical shape. More specifically, the third filter portion 63a is formed into a cylindrical shape with a diameter larger than that of the second filter portion 62a of the second body 62. A plurality of third holes 630 are formed in the third filter portion 63a. Each third hole 630 is in the shape of a circular hole. Each third hole 630 is distributed over substantially the entire area of ​​the third filter portion 63a and penetrates the third filter portion 63a in the radial direction. It should be noted that the third filter portion 63a can also be formed by punching metal having a plurality of through holes corresponding to the third holes 630. In addition, the third filter portion 63a can be made of resin.

[0105] The frame portion 63b is made of resin and is formed into a substantially 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. Thus, the frame portion 63b holds the third filter portion 63a. Figure 8 As shown, a plurality of engaging claws 631 are formed on the frame portion 63b. Each engaging claw 631 protrudes toward the inner side of the frame portion 63b. It should be noted that the frame portion 63b is formed in a symmetrical shape between the upper portion and the lower portion.

[0106] like Figure 7As shown, the fourth body 64 is formed into a plate-like shape that is approximately rectangular when viewed from above. 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 threaded holes 64e to 64g. The fourth filter portion 64a occupies substantially the entire area of ​​the fourth body 64. A plurality of fourth holes 640 are formed in the fourth filter portion 64a, and a support sheet 641 is also formed. Each fourth hole 640 is in the shape of a circular hole. Each fourth hole 640 is distributed over substantially the entire area of ​​the fourth filter portion 64a, and penetrates the fourth filter portion 64a in the up and down direction.

[0107] The support piece 641 is formed at 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 punching metal.

[0108] The first to third mounting holes 64b to 64d and the first to third threaded 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.

[0109] The connecting tube 25a of the water storage tank 25 is inserted into the first mounting hole 64b. The first passage 27a is installed in the second and third mounting holes 64c and 64d. Figure 4 The first to third mounting screws 65a to 65c are shown.

[0110] like Figure 7 As shown, in the filter unit 29, the opening area of ​​each first hole 610 of the first filter part 61a, the opening area of ​​each third hole 630 of the third filter part 63a, and the opening area of ​​each fourth hole 640 of the fourth filter part 64a are all equal. Specifically, each first hole 610, each third hole 630, and each fourth hole 640 are set to have an inner diameter of about 2 mm.

[0111] 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. In addition, the opening area of ​​each second connecting hole 624 and each connecting hole 61c is also larger than the opening area of ​​each first hole 610, each third hole 630 and each fourth hole 640. It should be noted that if the opening area of ​​each first hole 610, each third hole 630 and each fourth hole 640 is smaller than the opening area of ​​each second hole 620, there may be a difference in the opening areas. In addition, the opening area of ​​the second connecting hole 624 and the opening area of ​​each connecting hole 61c of the first body 61 may be the same or different.

[0112] like Figure 5 , Figure 6 and Figure 8As shown, in the dishwasher, the filter unit 29 is arranged in the washing space 100, the water storage part 23 and the water storage tank 25. When the filter unit 29 is arranged, first, as shown in FIG. Figure 4 As shown, in the filter unit 29, the connecting cylinder 25a of the water storage tank 25 is inserted into the first mounting hole 64b of the fourth body 64, and the first passage 27a is mounted in the second and third mounting holes 64c and 64d. Then, in this state, the fourth body 64 is fixed to the lower wall 3e of the washing tank 3 by the first to third mounting screws 65a to 65c. At this time, the second and third mounting screws 65b and 65c and the first passage 27a fix the fourth body 64 to the lower wall 3e.

[0113] Next, in the filtering unit 29, as Figures 5 to 8 As shown, the third body 63 is arranged below the first body 61. Then, in this state, the second filter portion 62a of the second body 62 is inserted from above into the Figure 7 The insertion hole 61b of the first body 61 is shown. Figure 8 As shown, the second filter portion 62a enters the third body 63, that is, the inner side of the third filter portion 63a and the frame portion 63b. In addition, in the second filter portion 62a, each locking piece 621 is engaged with the outer peripheral edge of the insertion hole 61b. Thus, the first body 61 and the second body 62 are assembled. In addition, at this time, each connection hole 61c of the first body 61 is connected to each second connecting hole 624 from below.

[0114] In addition, in the second filter portion 62a, the engagement rib 622 engages with the engagement claw 631 of the third body 63. Thus, the second body 62 and the third body 63 are assembled, and the third body 63 is located below the first body 61 in a state of being assembled to the second body 62. By assembling the second body 62 to the first body 61 and the third body 63 in this way, the first to third bodies 61 to 63 are assembled into one body.

[0115] Then, if Figure 5 and Figure 6 As shown, the first body 61 is placed on the lower wall 3e of the washing tank 3 and the supporting piece 641 of the fourth body 64. Thus, the first body 61 and the fourth body 64 are arranged on the lower wall 3e and cover the water storage part 23 from above. In addition, the third body 63 is arranged in the water storage tank 25 in a state that its upper part protrudes from the connection port 23a into the water storage part 23.

[0116] Here, if Figure 5 , Figure 6 and Figure 8As shown, in the filter unit 29, the third filter part 63a is formed into a cylindrical shape with a larger diameter than the second filter part 62a, so that the second filter part 62a enters the inner side of the third filter part 63a and the frame part 63b, thereby making the third filter part 63a form a state of covering the second filter part 62a from the outside. Accordingly, a gap S extending in a cylindrical shape is formed between the second filter part 62a and the third filter part 63a. In addition, each second hole 620 of the second filter part 62a and each third hole 630 of the third filter part 63a are opposite to each other in the radial direction of the second filter part 62a and the third filter part 63a across the gap S. In addition, the gap S is connected to the inside of the water storage tank 25 at the lower end.

[0117] In addition, in the second body 62 , the flange portion 62 d covers the gap S from above. Furthermore, each second communication hole 624 communicates with the gap S from above through each connection hole 61 c.

[0118] In addition, in the filter unit 29, the first body 61 is only placed on the lower wall 3e and the fourth body 64, and is not fixed relative to the lower wall 3e and the fourth body 64. In addition, by engaging or not engaging the respective locking pieces 621 of the second filter portion 62a with the outer periphery of the insertion hole 61b of the first body 61, the first body 61 and the second body 62 can be assembled and disassembled. In addition, by engaging or not engaging the engaging ribs 622 of the second filter portion 62a with the engaging claws 631 of the third body 63, the second body 62 and the third body 63 can be assembled and disassembled.

[0119] According to this, in the filter unit 29, in the state where the first to third bodies 61 to 63 are assembled as one body, the first to third bodies 61 to 63 can be removed as one body from the washing tank 3 and the water storage tank 25, and the user can clean the first to third bodies 61 to 63 outside the dishwasher. At this time, the user can also disassemble and clean the first to third bodies 61 to 63 as needed.

[0120] Figure 1 The storage tank 7 shown in the figure stores a dishwashing agent as a treatment agent. It should be noted that the treatment agent may also be a dishwashing detergent or the like.

[0121] The storage tank 7 is attached to the supply road side connection part 35 and the vent part 37, and is arranged in the cleaning space 100. Although detailed illustration is omitted, the storage tank 7 can be detached from the supply road side connection part 35 and the vent part 37. Therefore, by detaching the storage tank 7 from the supply road side connection part 35 and the vent part 37, the storage tank 7 can be taken out of the cleaning space 100. In this way, the treatment agent can be replenished in the storage tank 7 outside the cleaning space 100.

[0122] The storage tank 7 is installed on the supply road side connection part 35 and the ventilation part 37, so that the storage tank 7 can be connected to the supply road side connection part 35 and the ventilation part 37. Figure 3 The supply passage body 34 shown is connected to the processing agent supply device 9. In addition, the storage tank 7 is attached to the vent portion 37, so that the interior of the storage tank 7 communicates with the ventilation passage 28a through the vent portion 37.

[0123] Figure 1 The first cutlery basket 13, the second cutlery basket 14, and the third cutlery basket 15 shown can carry objects to be washed (not shown). The first cutlery basket 13, the second cutlery basket 14, and the third cutlery basket 15 classify the objects to be washed according to the types of the objects to be washed. In addition, the first cutlery basket 13 is formed to mainly carry large objects to be washed. It should be noted that the objects to be washed include, for example, tableware such as plates and bowls; eating utensils such as chopsticks and cups; and cooking containers such as pots.

[0124] The first cutlery basket 13 consists of Figure 2 The first lower guide member 111 and the second lower guide member 114 shown are guided in the front-to-back direction and can enter and exit the washing space 100, and can be stored in the washing space 100 in a horizontal posture in the front-to-back direction and the left-to-right direction by the first lower guide member 111 and the second lower guide member 114. Similarly, the second cutlery basket 14 is guided in the front-to-back direction by the first middle guide member 112 and the second middle guide member 115 and can enter and exit the washing space 100, and can be stored in the washing space 100 in a horizontal posture in the front-to-back direction and the left-to-right direction by the first middle guide member 112 and the second middle guide member 115. Moreover, the third cutlery basket 15 is guided in the front-to-back direction by the first upper guide member 113 and the second upper guide member 116 and can enter and exit the washing space 100, and can be stored in the washing space 100 in a horizontal posture in the front-to-back direction and the left-to-right direction by the first upper guide member 113 and the second upper guide member 116.

[0125] In addition, the first cutlery basket 13 has a handle portion 13a and an interference portion 13b. The handle portion 13a is provided at the front of the first cutlery basket 13. When the first cutlery basket 13 is moved in and out of the washing space 100, the user can hold the handle portion 13a.

[0126] The interference portion 13b is provided at the right part of the first cutlery basket 13. Although the detailed illustration is omitted, the interference portion 13b extends from the right part of the first cutlery basket 13 to the left side and then extends to the upper part of the first cutlery basket 13. When the first cutlery basket 13 is stored in the washing space 100 with the storage tank 7 arranged in the washing space 100, if the storage tank 7 is properly installed in the supply path side connection part 35 and the vent part 37, the interference portion 13b does not contact the storage tank 7, but faces the storage tank 7 from the left side. On the other hand, when the storage tank 7 is not completely installed with respect to the supply path side connection part 35 and the vent part 37, the interference portion 13b interferes with the storage tank 7 when the first cutlery basket 13 is stored in the washing space 100.

[0127] like Figure 1 As shown, the operating unit 19 is provided on the cover body 5 and arranged on the upper part of the inner panel 5b. The operating unit 19 is connected to the control unit 21 in a manner that it can be powered. In addition, the operating unit 19 has an operation button and a display that are not shown. The operating unit 19 can operate the dishwasher by operating the operation button. In addition, the operating unit 19 displays the operating time and the like on the display. It should be noted that the operating unit 19 can also be arranged on the outer panel 5a.

[0128] The control unit 21 is provided on the cover 5 and 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 drainage pump 45, the water supply solenoid valve, the drainage solenoid valve, the air intake fan 28c and the supply device body 9a. Thus, the control unit 21 performs the washing operation, the rinsing operation and the drying operation. It should be noted that the control unit 21 can also be disposed in the storage space 10.

[0129] In the dishwashing machine, when washing the objects to be washed, the user installs the storage tank 7 storing the treatment agent to the supply path side connection part 35 and the ventilation part 37. And in this state, the user respectively arranges the first to third tableware baskets 13 to 15 carrying the objects to be washed in the washing space 100. Then, the user swings the cover 5 to the closed position and operates the operation part 19. Thus, in the dishwashing machine, the control part 21 sequentially performs the washing operation, the rinsing operation and the drying operation. It should be noted that the control part 21 can also perform only any one of the washing operation, the rinsing operation and the drying operation.

[0130] During the cleaning operation, the control unit 21 opens the water supply solenoid valve provided in the water supply hose 41 and operates the water supply pump 43. Thus, water from the water supply source is sprayed as cleaning water from each spraying portion 300 of the first spray nozzle 31 into the cleaning space 100 via the water supply hose 41, the water supply pump 43, the water distributor 26 and the connecting cylinder 25a. In addition, the cleaning water is also sprayed from each spraying portion 300 of the second and third spray nozzles 32 and 33 into the cleaning space 100 from the water distributor 26 via the water supply channel 27. In addition, during the cleaning operation, the detergent for tableware is supplied into the cleaning space 100 by using the detergent automatic feeding device (not shown) provided in the cleaning tank 3. In this way, during the cleaning operation, the objects to be cleaned are cleaned by using the cleaning water containing the detergent. It should be noted that during the cleaning operation, the control unit 21 closes the water supply solenoid valve by supplying a specified amount of water from the water supply source.

[0131] In this way, the object to be cleaned is cleaned with the cleaning water in the cleaning space 100, so that the residues such as leftovers attached to the object to be cleaned are peeled off from the object to be cleaned. As a result, the residues are contained in the cleaning water and flow downward in the cleaning space 100 together with the cleaning water. In this way, the cleaning water containing the residues is Figure 5 , Figure 6 and Figure 8 As indicated by the solid arrow in FIG. 2 , the water flows through the filter unit 29 and is stored in the water storage portion 23 and the water storage tank 25 .

[0132] More specifically, in the filter unit 29 , the wash water containing the residue in the wash space 100 flows from the first filter portion 61 a of the first body 61 , the fourth filter portion 64 a of the fourth body 64 , or the extension portion 62 e of the second body 62 to the second filter portion 62 a via the first communication hole 623 .

[0133] Here, in the first filter portion 61a, the washing water flows through the first holes 610, while the residues larger than the first holes 610 cannot pass through the first holes 610 and are captured by the first holes 610. Similarly, in the fourth filter portion 64a, the washing water flows through the fourth holes 640, while the residues larger than the fourth holes 640 cannot pass through the fourth holes 640 and are captured by the fourth holes 640. In this way, the washing water flowing through the first filter portion 61a and the fourth filter portion 64a and the residues smaller than the first holes 610 and the fourth holes 640 are stored in the water storage portion 23 and the water storage tank 25.

[0134] In addition, in the second filter portion 62a, the washing water and the residue flowing inside 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 the second holes 620. In the second filter portion 62a, the washing water flows through the second holes 620, while the residue larger than the second holes 620 cannot pass through the second holes 620 and is captured by the second holes 620.

[0135] In this way, the washing water and the residue smaller than each second hole 620 flow toward the gap S and the third filter portion 63a of the third body 63 to the outside of the second filter portion 62a. Thus, in the third filter portion 63a, of the washing water and the residue flowing through the gap S, the washing water flows through each third hole 630 and flows toward the water storage tank 25 in the radial direction of the third filter portion 63a. On the other hand, the residue larger than each third hole 630, that is, the residue smaller than each second hole 620 and larger than each third hole 630 cannot pass through each third hole 630 and is captured by each third hole 630.

[0136] As a result, the washing water flowing through each third hole 630 and the residue smaller than each third hole 630 are stored in the water storage tank 25. In addition, in the dishwasher, the washing water that has passed through the filter unit 29, that is, the washing water that has passed through the first holes 610, the fourth holes 640 or the third holes 630 is stored in the water storage tank 25. Figure 5 The first connection port 251 shown flows in the supply path 6 toward the water supply pump 43. The washing water is then sprayed again into the washing space 100 from each spraying portion 300 of the first to third spraying nozzles 31 to 33 via the water distributor 26 and the water supply passage 27 by the water supply pump 43. Thus, the washing of the object to be washed continues in the washing space 100 until the washing time set as the washing operation has passed.

[0137] Then, when the cleaning time set as the cleaning operation has elapsed, the control unit 21 opens the drain electromagnetic valve provided in the drain hose 47 and operates the drain pump 45. In addition, the control unit 21 stops the water supply pump 43.

[0138] Thus, the washing operation of the dishwasher is terminated. The washing water that has passed through the filter unit 29 as described above is discharged from the dishwasher by the drain pump 45. Figure 6 The second connection port 252 shown is discharged to the outside of the dishwasher through the drain path 8 and the drain hose 47. At this time, the residues that have passed through the first holes 610, the fourth holes 640 or the third holes 630 are inevitably discharged to the outside of the dishwasher together with the washing water.

[0139] Here, each first hole 610, each third hole 630, and each fourth hole 640 are circular holes with an inner diameter of about 2 mm, so the amount of residue passing through each first hole 610, each third hole 630, and each fourth hole 640 is extremely small. Therefore, the impact of the residue being discharged to the outside of the dishwasher is reduced.

[0140] During the rinsing operation, the control unit 21 opens the water supply solenoid valve and operates the water supply pump 43. As a result, water from the water supply source is sprayed from each spraying unit 300 of the first to third spraying nozzles 31 to 33 into the washing space 100 as washing water, similarly to the washing operation. In addition, during the rinsing operation, the control unit 21 operates the supply device body 9a. As a result, the treatment agent stored in the storage tank 7 flows to the supply device body 9a via the treatment agent supply path 11. And the treatment agent is automatically supplied to the washing space 100 from the treatment agent supply port 9b. In this way, during the rinsing operation, the object to be washed is rinsed with washing water containing the treatment agent.

[0141] When the washing time set for the rinse washing operation has elapsed, control unit 21 discharges the washing water in washing space 100 to the outside of the dishwasher in the same manner as in the rinse washing operation.

[0142] During the drying operation, the control unit 21 operates the intake fan 28c. As a result, the air in the cleaning space 100 circulates in the ventilation channel 28a from each second vent 37a of the ventilation unit 37. In addition, the air in the ventilation channel 28a is supplied from the air supply unit 28d to the cleaning space 100 via the connecting hose 28b and the intake fan 28c. In this way, during the drying operation, the air circulates between the inside of the cleaning space 100 and the outside of the cleaning space 100, that is, the outside of the cleaning tank 3, and the objects to be cleaned are dried. If the cleaning time set as the drying operation has passed, the control unit 21 stops the intake fan 28c. In this way, the drying operation is terminated.

[0143] Thus, in the dishwasher, the first holes 610, the second holes 620, the third holes 630, and the fourth holes 640, and even the first to fourth filter portions 61a to 64a of the filter unit 29 can well capture the debris. Therefore, in the dishwasher, the washing water flowing through the supply path 6 from the water storage tank 25 and the washing water flowing through the drainage path 8 from the water storage tank 25 are unlikely to contain debris.

[0144] In addition, if Figure 5 , Figure 6 and Figure 8As shown by the solid arrow in , in the filter unit 29, a part of the washing water in the washing space 100 also flows into the gap S from the extension portion 62e of the second body 62 through the second connecting holes 624 and the connecting holes 61c of the first body 61. And the washing water passing through the second connecting holes 624 and the connecting holes 61c flows from the top to the bottom along the second filter part 62a and the third filter part 63a in the gap S. That is, the washing water flowing into the gap S through the second connecting holes 624 and the connecting holes 61c flows in a manner intersecting with the washing water and residue flowing toward the gap S from the second holes 620 of the second filter part 62a.

[0145] In addition, there are a plurality of second communicating holes 624 and connecting holes 61c, respectively. In addition, the opening area of ​​each second communicating hole 624 and each connecting hole 61c is larger than the opening area of ​​each first hole 610, each third hole 630, and each fourth hole 640. Therefore, in the dishwasher, the flow rate of the washing water flowing into the gap S through each second communicating hole 624 and each connecting hole 61c can be well ensured.

[0146] Therefore, in the dishwasher, even if the residues captured by the third holes 630 adhere to the third filter 63a, the residues can be well removed from the third filter 63a by the washing water flowing into the gap S through the second connecting holes 624 and the connecting holes 61c. In other words, in the dishwasher, although the number of times the first to third bodies 61 to 63 are removed from the washing tank 3 and the water storage tank 25 to wash the first to third bodies 61 to 63 is reduced as much as possible, the clogging of the third holes 630 due to the residues can be well prevented.

[0147] As a result, in the dishwasher, the third holes 630 are less likely to be clogged by the debris, and the flow of the washing water to the supply path 6 and the drain path 8 is less likely to be blocked. Therefore, in the dishwasher, the amount of washing water supplied to the washing space 100 by the water supply pump 43 through the supply path 6 can be well ensured, and the amount of washing water discharged to the outside of the dishwasher by the drain pump 45 through the drain path 8 can be well ensured. It should be noted that, strictly speaking, in the dishwasher, not only the washing water but also the debris smaller than the second communicating holes 624 and the connecting holes 61c flows into the gap S through the second communicating holes 624 and the connecting holes 61c together with the washing water. And the debris flowing through the second communicating holes 624 and the connecting holes 61c is accumulated in the water storage tank 25 through the gap S.

[0148] Therefore, the dishwasher of the embodiment has excellent residue collection performance, and also has excellent washing performance and drainage performance.

[0149] In addition, in the dishwasher, the first guide portion 62b and the second guide portion 62c of the second body 62 can rectify the washing water and the residue flowing through the second filter portion 62a and guide them toward the second holes 620. Therefore, in the dishwasher, the washing water and the residue can flow well through the second filter portion 62a, and the residue can be well captured by the second holes 620 and the third holes 630 of the third body 63.

[0150] In addition, in the dishwasher, the first body 61 and the second body 62 can be detached, and the second body 62 and the third body 63 can be detached. Therefore, the user can handle the first to third bodies 61 to 63 as a whole, and can also easily disassemble the first to third bodies 61 to 63 as needed.

[0151] Furthermore, in the dishwasher, the second filter 62a and the third filter 63a can be easily positioned by assembling the second body 62 and the third body 63. Therefore, in the dishwasher, the gap S can be well formed between the second filter 62a and the third filter 63a.

[0152] In addition, in the dishwasher, the flange portion 62d of the second body 62 covers the gap S from above, so that residues are difficult to enter the gap S from above. In addition, by forming each second communication hole 624 in the flange portion 62d, it is possible to easily form each second communication hole 624, and each second communication hole 624 can be well connected to the gap S from above.

[0153] As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment, It is a matter of course that it can be applied with appropriate changes within the range which does not deviate from the summary.

[0154] For example, in the dishwasher of the embodiment, the first to fourth bodies 61 to 64 constitute the filter unit 29. However, the present invention is not limited thereto, and the fourth body 64 may be omitted, and the filter unit 29 may be constituted by the first to third bodies 61 to 63.

[0155] In the dishwasher of the embodiment, the supply path 6 and the drain path 8 are integrally formed with the water storage tank 25. However, the present invention is not limited thereto, and the supply path 6 and the drain path 8 may be formed separately from the water storage tank 25 and connected to the water storage tank 25, respectively.

[0156] In the dishwasher of the embodiment, water storage tank 25 may be omitted so that supply path 6 and drainage path 8 are directly connected to water storage portion 23 .

[0157] In the dishwasher of the embodiment, the “communication hole” in the present invention may be formed in first body 61 or third body 63 .

[0158] In the dishwasher of the embodiment, a single pump capable of supplying and draining washing water may be provided instead of water supply pump 43 and drainage pump 45 .

[0159] In addition, in the dishwasher of the embodiment, the washing tank 3 may be movable relative to the housing 1 .

[0160] The present invention can be used in a tableware washing machine, a tableware washing and drying machine or kitchen equipment, etc.

Claims

1. A dishwashing machine, characterized in that: have: A cleaning tank (3) is formed with a cleaning space (100) capable of cleaning an object with cleaning water, and a water storage portion (23) located below the cleaning space (100) for storing the cleaning water; a filtering unit (29) which allows the washing water to flow and can capture residues contained in the washing water; a pump (43) capable of supplying the washing water to the washing space (100); a supply path (6) which communicates with the water storage portion (23) and allows the washing water having passed through the filter unit (29) to flow through the pump (43); and a discharge passage (8) which is in communication with the water storage portion (23) and discharges the washing water having passed through the filter unit (29) to the outside of the washing tank (3); The filter unit (29) comprises: a first body (61) which is disposed in the cleaning tank (3) and covers the water storage portion (23) from above; a second body (62) which is inserted into the first body (61); and a third body (63) which is located below the first body (61). The first body (61) has a first filter portion (61a) in a plate shape. The second body (62) has a second filter portion (62a) which is in the shape of a cylinder extending downwardly from the first filter portion (61a), and the washing water and the residue can flow therein. The third body (63) has a cylindrical third filter portion (63a), the third filter portion (63a) covers the second filter portion (62a) from the outside and has a larger diameter than the second filter portion (62a). A plurality of first holes (610) are formed in the first filter portion (61a), and the plurality of first holes (610) are connected to the water storage portion (23), so as to allow the cleaning water to flow and to capture the residue larger than the cleaning water. A plurality of second holes (620) are formed in the second filter portion (62a). The plurality of second holes (620) are formed to have an opening area larger than that of each of the first holes (610), so as to allow the cleaning water to flow and to capture the residue larger than itself. A plurality of third holes (630) are formed in the third filter portion (63a), and the plurality of third holes (630) are formed to have an opening area smaller than that of each of the second holes (620), so as to allow the washing water to flow and to capture the residue larger than itself. A gap (S) is formed between the second filter portion (62a) and the third filter portion (63a), the gap (S) being cylindrical and communicating with the second holes (620) and the third holes (630). The washing water and the residue flowing through the second holes (620) flow toward the gap (S) and toward the outside of the second filter portion (62a). A communication hole (624) is formed in the first body (61), the second body (62) or the third body (63). The communication hole (624) communicates with the space (S) from above and allows the cleaning water to flow into the space (S) from above to below.

2. The dishwasher according to claim 1, characterized in that: There are multiple communicating holes (624). The opening area of ​​each of the communicating holes (624) is larger than that of each of the first holes (610) and each of the third holes (630).

3. The dishwasher according to claim 1 or 2, characterized in that: The second body (62) has guide portions (62b, 62c) formed inside the second filter portion (62a) and capable of guiding the cleaning water and the residue flowing through the second filter portion (62a) toward the second holes (620).

4. The dishwasher according to claim 1 or 2, characterized in that: The second body (62) and the third body (63) can be assembled and disassembled. The third body (63) is located below the first body (61) in a state of being assembled to the second body (62).

5. The dishwasher according to claim 1 or 2, characterized in that: The second body (62) has a flange portion (62d) connected to the second filter portion (62a) and covering the gap (S) from above. The communication hole (624) is formed in the flange portion (62d).

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