CN109717806B

CN109717806B - Tableware cleaning machine

Info

Publication number: CN109717806B
Application number: CN201811260181.6A
Authority: CN
Inventors: 森川悠; 的场识義
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2017-10-27
Filing date: 2018-10-26
Publication date: 2023-07-28
Anticipated expiration: 2038-10-26
Also published as: JP6913854B2; CN109717806A; JP2019080602A

Abstract

The invention provides a dish washing machine. The dish washing machine includes: a cleaning tank provided in the main body for accommodating the object to be cleaned; a 1 st rotary cleaning device such as a cleaning nozzle for cleaning an object to be cleaned stored in the cleaning tank; and a water outlet arranged at the bottom of the cleaning tank. In addition, the dish washing machine includes: a washing pump for supplying washing water in the washing tub to the washing device; a washing water circulation path (21) which communicates the water discharge port with the washing pump; and a residue filter detachably fixed to the drain port. A plurality of suction ports (61) for sucking the cleaning water from the drain port to the cleaning water circulation path (21) are radially arranged in a circulation drain chamber (46) provided in the drain port in a circular shape in the main portion. Thus, a dishwasher with less frequency of cleaning the residue filter (23) while maintaining the cleaning force can be provided.

Description

Tableware cleaning machine

Technical Field

The present invention relates to a dish washing machine for washing objects to be washed such as dishes stored in a washing tub. In particular, the present invention relates to a drain opening for a dish washing machine.

Background

Conventionally, a conventional dish washer jets washing water from a washing nozzle from which residues and dirt are removed by a residue filter to wash an object to be washed (for example, see patent literature 1). In a conventional dish washing machine, first, residues and dirt contained in washing water are removed by a residue filter provided in a drain port provided at the bottom of a washing tub. The cleaning water from which dirt and the like are removed is sucked into the cleaning water circulation path by the cleaning pump from the drain port and is pressurized and conveyed to the cleaning nozzle. Subsequently, the object to be cleaned is cleaned by the cleaning water sprayed from the cleaning nozzle.

The conventional dish washer described in patent document 1 will be described below with reference to fig. 22. Fig. 22 is a longitudinal cross-sectional view of a main part of a drain port of the dish washing machine described in patent document 1.

As shown in fig. 22, the dish washing machine has a drain port 102 at the bottom of a washing tub 101. The drain port 102 extends from a part of the lower side of the outer peripheral wall to form a cleaning pipe path 103. The cleaning pipe path 103 communicates with the cleaning pump and the cleaning nozzle. The drain port 102 extends from the bottom to form a drain pipe path 104. A filter 105 is placed above the drain port 102. At this time, the cleaning water is sprayed from the cleaning nozzle, and after the object to be cleaned is cleaned, the cleaning water falls down toward the bottom of the cleaning tank 101 and is collected at the drain port 102. Subsequently, residues and dirt contained in the washing water are removed by the filter 105. Then, the cleaning water is sucked from the drain port 102 into the cleaning pipe path 103 by the cleaning pump, and is pressurized and conveyed again to the cleaning nozzle, and the cleaning water is ejected from the cleaning nozzle.

That is, in the conventional dish washer, as shown by the arrow in fig. 22, the washing water flows in the drain port 102 at a portion (path) close to the washing pipe path 103. Therefore, the amount of the washing water sucked into the washing pipe path 103 is overwhelmingly larger than the amount of the washing water flowing through the other portion (path) and sucked into the washing pipe path 103. As a result, more residues and dirt adhere to the portion 105a of the filter 105 close to the cleaning pipe path 103 than to the portion 105b of the filter 105 far from the cleaning pipe path 103. Therefore, clogging of the filter 105 occurs in advance. As a result, the flow potential and the amount of the cleaning water sucked from the cleaning pipe path 103 and ejected from the cleaning nozzle are reduced, resulting in a reduction in cleaning force.

In addition, in order to maintain the cleaning force even when a part of the filter 105 is clogged, the user must frequently detach the filter 105 to perform cleaning.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 2002-209825

Disclosure of Invention

The invention provides a dish washing machine capable of improving the flow of washing water sucked from a water outlet to a washing water circulation path, maintaining the washing force and reducing the cleaning frequency of a residue filter.

The dish washing machine of the present invention comprises: a main body; a cleaning tank provided in the main body for accommodating the object to be cleaned; a cleaning device for cleaning an object to be cleaned; a water outlet arranged at the bottom of the cleaning tank; a washing pump for delivering washing water in the washing tank to the washing device; a washing water circulation path communicating the drain port and the washing pump; and a residue filter detachably fixed to the drain port. The drain port has a circular drain chamber with a main portion formed in a circular shape, and a plurality of suction ports for sucking the washing water from the drain port to the washing water circulation path are radially arranged in the circular drain chamber.

With this structure, the flow of the washing water sucked from the drain port to the washing water circulation path can be improved. Thus, a dishwasher capable of maintaining a cleaning force and reducing a cleaning frequency of a residue filter is provided.

Drawings

Fig. 1 is a front perspective view showing a state in which an upper door body and a lower door body of a dish washing machine according to an embodiment of the present invention are opened.

FIG. 2 is a rear perspective view of the dish washing machine.

FIG. 3 is a front view of the dish washing machine.

FIG. 4 is a front view in section showing the main part of the dish washing machine.

FIG. 5 is a view showing a cross section of a side wall portion of the dish washing machine in a state where an upper door body and a lower door body are closed.

FIG. 6 is a side view showing a state in which the upper door body and the lower door body of the dish washing machine are opened.

FIG. 7 is a perspective view showing the structure of an upper basket of the dish washing machine.

FIG. 8 is a perspective view showing the structure of a lower dish basket of the dish washing machine.

FIG. 9 is a top sectional view showing a water accumulation portion and a water discharge port of the washing tub of the dishwasher.

FIG. 10 is a top view showing a water accumulation section and a drain port of the washing tub of the dishwasher, with the water accumulation section cover removed.

FIG. 11 is a perspective view, taken along line 11-11, of FIG. 9 showing the structure of the water accumulation portion and the water discharge port of the washing tub of the dish washing machine.

FIG. 12 is a perspective view, taken along line 12-12, of FIG. 9 showing the structure of the water accumulation portion and the water discharge port of the washing tub of the dish washing machine.

FIG. 13 is a perspective view, taken along line 13-13, of FIG. 10 showing the structure of the water accumulation portion and the water discharge port of the washing tub of the dish washing machine.

FIG. 14 is a top perspective view of the drain opening of the dish washing machine.

FIG. 15 is an exploded perspective view of the drain opening of the dish washing machine.

FIG. 16 is a bottom perspective view, partially in section, of the drain opening profile of the dish washing machine described above.

FIG. 17 is a top cross-sectional view of the drain opening of the dish washing machine.

FIG. 18 is a view showing a cross section taken along line 18-18 of FIG. 14, showing the structure of a drain port of the dish washing machine.

FIG. 19 is a view showing a section of line 19-19 of FIG. 14 showing a structure of a drain port of the dish washing machine.

FIG. 20 is an exploded perspective view of the portion of the dish washing machine associated with the debris filter.

FIG. 21 is an explanatory view showing the flow of the washing water around the residue filter and the drain port during the washing and rinsing operations of the dishwasher.

FIG. 22 is a longitudinal sectional view of a main part of a drain port of a conventional dish washer.

Description of the reference numerals

1. A main body; 2. 101, cleaning a tank; 2a, 2b, inner side; 2c, an air outlet for drying; 2e, a bulge; 3. an opening portion; 4. an upper door body (door body); 4a, 5a, inner surface; 5. a lower door body (door body); 5b, upper end; 5c, lower end; 6. an object to be cleaned; 7. loading a tableware basket; 8. a tableware basket is arranged; 9. a sealing member; 10. a door opening and closing mechanism; 11. a door opening button; 12. a door locking device; 13. an operation display unit; 14. 1 st rotary cleaning nozzle (cleaning device); 15. 2 nd rotary cleaning nozzle (cleaning device); 16. a fixed cleaning nozzle (cleaning device); 16a, vertical portion; 16aa, 16ba, 16ca, injection holes; 16b, horizontal position 1; 16c, horizontal position 2; 17. 3 rd rotary cleaning nozzle (cleaning device); 18. a water accumulation part; 18a, an opening; 18b, a drain outlet bottom portion; 18ba, an outer wall; 18c, flow path control ribs; 18d, 20a, recesses; 19. a water outlet; 20. a water accumulation part cover; 20b, openings; 20c, overflow port; 20d, 51b, 52d, holes; 21. a washing water circulation path; 21a, a circulation path leading-in part; 21b, a circulation path leading-in part upper part; 21c, a circulation path leading-in part; 22. a cleaning pump; 23. a residue filter; 25. a heater; 26. a drainage path; 26a, a drainage path leading-in part; 26b, the upper part of the drainage path leading-in part; 26c, a drain path leading-in part; 27. a draining pump; 29. a temperature sensor; 30. a drying device; 31. a blower fan; 32. air supply piping; 33. an exhaust port; 41. an outboard water outlet; 42. a circulation drain; 43. an outer water discharge chamber; 44. an outline of the outer water outlet of the machine; 44a, an outer peripheral surface; 44b, 47a, upper surface; 44c, a shaft portion; 44d, cleaning the water diffusion part; 44e, circumferential connection; 45. a cleaning water drainage suction inlet; 46. a circulating drain chamber; 47. a circulation drain outlet profile; 47b, an inner peripheral surface; 47c, rectifying ribs; 47d, shielding ribs; 48. a washing water circulation suction inlet; 48a, a washing water circulation upper suction inlet (upper suction inlet); 48b, cleaning water circulation inner peripheral suction port (inner peripheral suction port); 49. a drain outlet profile member; 51. a 1 st filter; 51a, 52b, outer peripheral portions; 52. a 2 nd filter; 52a, a main body portion; 52c, a handle portion; 52e, bottom; 52f, 2 nd cleaning water diffusion part; 52g, slit; 61. a suction inlet; 62. a washing water circular flow path; 63a, 63b, a circulation path communication flow path; 64. an outflow port; 71. a lower dish basket guide rail; 73. 83, side members; 77. a main body of the upper tableware basket; 78. 1 st placement basket; 79. a 2 nd placement basket; 81. a tableware basket guide rail is arranged; 87. a lower dish basket body; 88. 3 rd positioning basket; 89. a small article box; 90. a detergent input unit; 96. a water supply hose; 97. a drain hose; 102. a drain port; 103. cleaning the piping path portion; 104. a water discharge piping path portion; 105. a filter; 105a, a portion close to the cleaning piping path portion; 105b, a portion distant from the cleaning pipe path portion.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the present embodiment.

(embodiment)

First, a schematic structure of a dish washing machine according to an embodiment of the present invention will be described with reference to fig. 1 to 6.

Fig. 1 is a front perspective view showing a state in which an upper door body and a lower door body of a dish washing machine according to an embodiment of the present invention are opened. FIG. 2 is a rear perspective view of the dish washing machine. FIG. 3 is a front view of the dish washing machine. FIG. 4 is a front view in section showing the main part of the dish washing machine. FIG. 5 is a view showing a cross section of a side wall portion of the dish washing machine in a state where an upper door body and a lower door body are closed. FIG. 6 is a side view showing a state in which the upper door body and the lower door body of the dish washing machine are opened.

As shown in fig. 1 to 6, the dish washing machine of the present embodiment includes a main body 1 and a washing tub 2, and the washing tub 2 is provided inside the main body 1 and is made of, for example, a resin such as polypropylene. The washing tub 2 has an opening 3 in a front surface thereof for taking out and putting in objects 6 to be washed such as tableware. The opening 3 is configured to be openable and closable by an upper door body 4 and a lower door body 5. The upper door 4 and the lower door 5 constitute a door of the dish washing machine of the present embodiment.

A sealing member 9 made of an elastic body such as silicone rubber is disposed on the front surface around the opening 3. The sealing member 9 forms a sealing portion of the opening 3 by an upper door seal receiving portion (not shown) provided in the upper door 4 and a lower door seal receiving portion (not shown) provided in the lower door 5. An inter-door sealing member (not shown) is disposed at the lower end of the upper door 4. When the upper door body 4 and the lower door body 5 close the opening 3, the inter-door sealing member ensures tightness between the lower end portion of the upper door body 4 and the upper end portion of the lower door body 5.

The upper door 4 and the lower door 5 are connected to a pair of door opening and closing mechanisms 10 provided on the left and right outer side walls of the cleaning tank 2 as shown in fig. 5. The door opening and closing mechanism 10 rotates the upper door 4 and the lower door 5 in a linked manner to open and close the door. At this time, as shown in fig. 6, the upper door body 4 and the lower door body 5 are opened to a position where the inner surface 4a of the upper door body 4 and the inner surface 5a of the lower door body 5 are substantially horizontal (including horizontal) upward below the front side of the opening 3. The upper door body 4 and the lower door body 5 are disposed in an open state such that the upper door body 4 is overlapped with the lower door body 5.

A door opening button 11 shown in fig. 3 is disposed on the front surface of the lower door 5. As shown in fig. 5, a door locking device 12 is provided on the outer side wall of the cleaning tank 2. The door locking device 12 locks the upper door 4 and the lower door 5 to the washing tub 2 in a state where the upper door 4 and the lower door 5 close the opening 3. On the other hand, when the user pushes the door opening button 11, the lock of the upper door 4 and the lower door 5 by the door lock device 12 is released, and at this time, the upper end 5b of the lower door 5 is slightly rotated forward about the lower end 5 c. Thus, the user can easily open the upper door body 4 and the lower door body 5 by putting his/her fingers on the upper end portion 5b of the rotated lower door body 5.

The method of opening the upper door 4 and the lower door 5 is not limited to the above, and the upper door 4 and the lower door 5 may be automatically opened to the open state by the urging force in the opening direction.

As shown in fig. 3, an operation display unit 13 is disposed on the front surface of the lower door 5. The operation display unit 13 is electrically connected to a control unit (not shown) for controlling the operation of the dishwasher. The operation display unit 13 exchanges information related to the cleaning operation of the object 6 with the control unit. Thereby, the control unit controls the washing step, the rinsing step, the drying step, and the like of the dish washing machine, and performs the washing operation of the object 6 to be washed.

Specifically, first, the user operates the operation display unit 13, and inputs the selection of the operation program, and conditions such as the time and the number of times of washing, rinsing, and drying. The inputted condition is displayed on the operation display unit 13. Thus, the user can confirm the operation program, the operation status, and the like selected by the user based on the displayed information.

Further, the washing tub 2 accommodates therein an upper basket 7 and a lower basket 8 in which objects 6 to be washed such as dishes are placed. As shown in fig. 4, the upper basket 7 and the lower basket 8 are supported so as to be movable in the front-rear direction by upper basket rail 71 and lower basket rail 81 provided on the left and right inner surfaces 2a, 2b of the washing tub 2, respectively. Thus, when the upper door body 4 and the lower door body 5 are opened, the upper dish basket 7 and the lower dish basket 8 can be pulled out forward through the opening 3 of the washing tub 2. The upper basket 7 and the lower basket 8 are configured to be detachable from the upper basket rail 71 and the lower basket rail 81, respectively.

The dish washing machine according to the present embodiment is schematically constructed as described above.

Next, the structures of the upper and lower cutlery baskets 7 and 8 will be described in detail with reference to fig. 7 and 8.

FIG. 7 is a perspective view showing the structure of an upper basket of the dish washing machine. FIG. 8 is a perspective view showing the structure of a lower dish basket of the dish washing machine.

First, as shown in fig. 7, the upper basket 7 includes an upper basket body 77, a 1 st mounting basket 78, a 2 nd mounting basket 79, side members 73, and the like. The 1 st mounting basket 78 is placed on the left side of the upper cutlery basket body 77. The 2 nd mounting basket 79 is mounted on the right side of the upper cutlery basket body 77. The side members 73 are fixed to left and right ends of the upper basket body 77. The 1 st mounting basket 78 is configured to be detachable from the upper dish basket body 77. However, in general, the 1 st mounting basket 78 is used in a state of being fixedly mounted to the upper cutlery basket body 77.

Next, as shown in fig. 8, the lower cutlery basket 8 includes a lower cutlery basket main body 87, a 3 rd mounting basket 88, a small article case 89, side members 83, and the like. The 3 rd mounting basket 88 is placed, for example, on the left side of the lower cutlery basket body 87. The small article case 89 is placed, for example, slightly to the right of the center of the lower dish basket body 87. The side members 83 are fixed to left and right ends of the lower basket body 87. The 3 rd mounting basket 88 is configured to be detachable from the lower dish basket body 87. However, in general, the 3 rd mounting basket 88 is used in a state of being fixedly mounted to the lower cutlery basket main body 87.

The upper basket 7 and the lower basket 8 of the dish washing machine of the present embodiment are constructed as described above.

The washing tub 2 includes a water supply unit (not shown) for supplying washing water therein. As shown in fig. 2, the water supply unit includes a water supply valve (not shown) provided in the main body 1, an internal water supply pipe (not shown) connecting the water supply valve and the cleaning tank 2, a water supply hose 96 connecting the water supply valve and a tap water pipe, and the like. The control unit controls the opening and closing operation of the water supply valve based on information from a water level sensor (not shown) communicating with the inside of the cleaning tank 2. Thereby, the water supply part supplies a predetermined amount of washing water to the inside of the washing tub 2 in the washing step and the rinsing step.

As shown in fig. 4, the 1 st rotary cleaning nozzle 14 and the 2 nd rotary cleaning nozzle 15 are disposed at the lower portion in the cleaning tank 2. The 1 st rotary washing nozzle 14 and the 2 nd rotary washing nozzle 15 have 1 or more spray holes that are opened so as to spray washing water upward.

A substantially cross-shaped (including a cross-shaped) fixed cleaning nozzle 16 is disposed along the inner wall of the cleaning tank 2 at the back surface of the inside of the cleaning tank 2. The fixed washing nozzle 16 is formed in a flat cylindrical shape. This ensures a wide space inside the cleaning tank 2.

In addition, the 3 rd rotary washing nozzle 17 is disposed below the left side of the upper dish basket 7. The 3 rd rotary washing nozzle 17 has 1 or more spray holes for spraying washing water on the upper surface. Thereby, the washing water is sprayed from directly below from the spray holes toward the objects 6 stored on the left side of the upper dish basket 7.

Further, for example, the cleaning water is sprayed from the 1 st rotary cleaning nozzle 14, the 2 nd rotary cleaning nozzle 15, the fixed cleaning nozzle 16, and the 3 rd rotary cleaning nozzle 17 communicating with the fixed cleaning nozzle 16 in this order toward the object 6 to be cleaned stored in the cleaning tank 2. By spraying the plurality of cleaning nozzles independently, the amount of water supplied by the cleaning water can be reduced as compared with the case where the plurality of cleaning nozzles are sprayed simultaneously. Therefore, the object 6 to be cleaned can be efficiently cleaned by the small pump.

As shown in fig. 5, the drying device 30 is provided inside the main body 1 at the outer side of the cleaning tank 2. The drying device 30 supplies drying air into the rinsed cleaning tank 2 to dry the object 6 to be cleaned. The drying device 30 includes a heater (not shown), a blower fan 31, a temperature sensor 29 (see fig. 13), a blower pipe 32, and the like. The structure of the drying device 30 is the same as that of a known drying device, and therefore, a detailed description thereof is omitted.

One end of the air supply pipe 32 of the drying device 30 communicates with the drying air outlet 2c provided in the right lower portion of the inside of the cleaning tank 2. The other end of the air supply pipe 32 is open to the outside of the right inner upper end portion of the cleaning tank 2. The blower fan 31 is disposed near the other end of the blower pipe 32. With this configuration, the drying air sucked from outside by the blower fan 31 is heated by the heater. The heated drying air is sent from the drying air outlet 2c into the cleaning tank 2 to dry the object 6 to be cleaned. Thus, the drying air becomes moist air containing moisture removed from the surface of the object 6 to be cleaned. The moist air is discharged to the outside from an exhaust port 33 provided in the upper surface of the main body 1. At this time, the temperature sensor 29 is provided on the outer wall of the position of the drying air outlet 2c near the bottom of the cleaning tank 2. Thereby, the temperature sensor 29 can more accurately detect the temperature of the drying air supplied to the cleaning tank 2. As a result, the object 6 to be cleaned can be dried effectively.

The dish washing machine of the present embodiment is constructed as described above.

Next, the structure of the water accumulation portion 18 of the washing tub 2 of the dish washing machine will be described with reference to fig. 9 to 13.

FIG. 9 is a top sectional view showing a water accumulation portion and a drain port of a washing tub of the dishwasher according to the above embodiment. Fig. 10 is a top view in cross section showing the state in which the water accumulation section cover is removed from the state in fig. 9. Fig. 11 is a cutaway perspective view of fig. 9 taken along line 11-11. Fig. 12 is a cross-sectional perspective view taken along line 12-12 of fig. 9. Fig. 13 is a cross-sectional perspective view taken along line 13-13 of fig. 10.

First, as shown in fig. 9 and 10, a water accumulation portion 18 is recessed in the bottom of the cleaning tank 2. The water accumulation portion 18 accumulates the supplied cleaning water in the cleaning step and the rinsing step. The water accumulation portion 18 is recessed from an opening portion 18a formed in a substantially rectangular shape (including rectangle) horizontally long, which is opened at the bottom of the cleaning tank 2, to a predetermined depth substantially vertically (including vertically). The water accumulation portion 18 is provided in front of the left and right substantially center (including the center) of the cleaning tank 2.

The water accumulation portion 18 has a recess 18d provided lower in a substantially central portion (including the central portion). A drain port 19 is provided in the recess 18d. The bottom surface of the water accumulation portion 18 is formed to be gently inclined downward toward the drain port 19.

The water accumulation portion cover 20 is detachably fitted into the opening 18a in the upper portion of the water accumulation portion 18. The water accumulation section cover 20 is fitted continuously, for example, flush with the bottom surface of the washing tub 2. The outer peripheral shape of the water accumulation portion cover 20 is formed in a substantially rectangular shape (including rectangle) having a horizontal length corresponding to the opening 18a of the water accumulation portion 18. The water accumulation portion cover 20 has a concave portion 20a in which a central portion is concavely formed. A circular opening 20b, for example, is formed in the center of the recess 20a. That is, the recess 20a is arranged to be located directly above the drain opening 19 when the water accumulation portion cover 20 is attached to the opening 18a of the water accumulation portion 18. The lower surface of the recess 20a is configured such that, when the residue filter 23 described later is attached to the drain port 19, the opening 20b is continuous with, for example, flush with, the upper surface of the outer edge portion of the 1 st filter 51 of the residue filter 23.

The water accumulation portion cover 20 has a plurality of holes 20d (see fig. 9) which are extremely small (for example, about 0.8mm in diameter) formed in most of the plane other than the inclined surface of the concave portion 20 a. Thus, the cleaning water mostly falls from the hole 20d to the water accumulation portion 18. On the other hand, the washing water which does not fall from the hole 20d flows into the residue filter 23 disposed on the lower surface of the recess 20a of the water accumulation unit cover 20 together with the residue.

The water accumulation portion cover 20 has an overflow 20c (see fig. 11) at an upper side of the recess 20 a. The overflow 20c is disposed at a position slightly higher than the washing water level (indicated by a broken line in fig. 12 a) at which the washing water is supplied. Thus, during the cleaning operation, when the water level of the cleaning water in the water accumulation portion cover 20 rises due to clogging of the residue filter 23 and the water accumulation portion cover 20, the cleaning water overflows from the overflow port 20c and is discharged.

A residue filter 23 for collecting residues is disposed in the drain port 19. The residue filter 23 is disposed below the lower surface of the recess 20a of the water accumulation unit cover 20.

As shown in fig. 12, 13, and the like, the drain port 19 communicates with the suction side of the wash pump 22 through the wash water circulation path 21. That is, the washing water is accumulated in the water accumulation portion 18 and the drain port 19 through the hole 20d of the water accumulation portion cover 20 and the residue filter 23 in the washing step and the rinsing step. The cleaning water accumulated in the water accumulation portion 18 and the water discharge port 19 is sucked by the cleaning pump 22 and pressurized. The pressurized washing water is supplied by a water dividing unit (not shown) with a water supply destination (washing nozzle) selected.

That is, the washing water supplied by the divided partial flow is supplied to the 1 st rotary washing nozzle 14, the 2 nd rotary washing nozzle 15, the fixed washing nozzle 16, and the 3 rd rotary washing nozzle 17 communicating with the fixed washing nozzle 16. Then, the cleaning water is injected from the injection holes of the respective nozzles to which the cleaning water is supplied. The sprayed cleaning water is returned to the water accumulation portion 18 and the drain port 19 after cleaning or rinsing the object 6. As described above, in the cleaning step or the rinsing step, the cleaning water circularly cleans or rinses the object 6 to be cleaned.

A heater 25 (see fig. 13) for heating the washing water is provided in the washing pump 22. Therefore, the heater 25 is energized, so that the circulated washing water is appropriately heated as needed. In addition, a temperature sensor 29 for detecting the temperature of the washing water is provided at the outer wall of the bottom of the washing tub 2. A bulge portion 2e bulging inward of the cleaning tank 2 is formed in an outer wall portion of the bottom portion of the cleaning tank 2 provided with the temperature sensor 29. A temperature sensor 29 is disposed inside the bulge portion 2e. At this time, since the bulge portion 2e is located at a position higher than the water level of the washing water stored in the washing tub 2 during washing, the washing water injected from the washing nozzle is injected into the bulge portion 2e. That is, the temperature of the washing water sprayed from the washing nozzle to be sprayed to the object 6 to be washed is detected by the temperature sensor 29. Therefore, compared with the case where the temperature sensor 29 is disposed at a position in the water that is not in the cleaning tank 2, the temperature of the cleaning water ejected from the cleaning nozzle can be detected. Thereby, the detection sensitivity of the temperature sensor 29 for detecting the temperature of the washing water ejected from the washing nozzle is improved. The control unit controls the energization of the heater 25 based on the detection information of the temperature sensor 29. Here, the temperature sensor 29 is constituted by, for example, a thermistor or the like.

In the drying step, the temperature sensor 29 also serves as an air temperature sensor for detecting the temperature of the air in the cleaning tank 2.

The drain port 19 communicates with the suction side of the drain pump 27 through a drain path 26. The drain path 26 communicates with a connection port of an off-board drain hose 97 (see fig. 2). Thereby, the washing water is sucked by the drain pump 27 and discharged when the washing step and the rinsing step are completed. Specifically, the washing water is discharged from the drain path 26 to the outside of the dish washing machine via the drain hose 97 (see fig. 2) by the drain pump 27.

The water accumulation portion 18 of the washing tub 2 of the dish washing machine is constructed as described above.

Next, the structure of the drain port 19 will be described with reference to fig. 11 to 13.

As shown in fig. 11 to 13, the drain port 19 includes an off-machine drain port 41 located at the center of the water accumulation portion 18, a hollow annular circulation drain port 42, and the like. The circulation drain port 42 is provided around the outdoor drain port 41 so as to be spaced apart from the outdoor drain port 41.

The outer drain port 41 has an annular outer drain chamber 43 surrounded by an upper surface, a lower surface, an outer peripheral surface, and an inner peripheral surface. The lower surface of the outer drain chamber 43 is formed by a bottom surface formed in a circular shape by further recessing a part of the bottom surface of the recess 18d provided at a substantially central portion of the water accumulation portion 18. The upper surface, outer peripheral surface and inner peripheral surface of the outer drain chamber 43 are formed by an outer drain outlet contour 44.

The outer drain profile 44 includes an outer peripheral surface 44a, an upper surface 44b, a shaft portion 44c, a washing water diffusion portion 44d, a circumferential connection portion 44e, and the like, and the outer peripheral surface 44a is formed in a circumferential shape. The upper surface 44b is formed continuously with the outer peripheral surface 44 a. The shaft portion 44c is vertically higher than the upper surface 44b from a center of a circle forming the outer peripheral surface 44a by a height (including the same height) substantially equal to a lower end of the outer peripheral surface 44 a. The cleaning water diffusion portion 44d horizontally extends in a circular plate shape at the upper end portion of the shaft portion 44 c. The circumferential connection portion 44e continuously connects the wash water diffusion portion 44d with the upper surface 44b at 4 points.

The cleaning water drain suction port 45 is provided between the plurality of circumferential connection portions 44e at a lower portion of the cleaning water diffusion portion 44d of the outer drain port contour 44. The cleaning water discharge suction port 45 is formed in a plurality of circular arc shapes. At this time, the washing water drain suction port 45 is provided to secure a sufficient area to rapidly guide the discharged washing water to the outside drain chamber 43.

The upper surface of the washing water diffusion portion 44d is formed in a convex shape such that a circular center portion is higher than an outer peripheral portion. Thereby, the discharged washing water can be diffused in the entire circumferential direction.

The outdoor drain chamber 43 communicates with the suction side of the drain pump 27 through the drain path 26.

The circulation drain 42 has a circular circulation drain chamber 46 surrounded by an upper surface, a lower surface, an outer peripheral surface, and an inner peripheral surface. The lower surface of the circulation drain chamber 46 is formed by a portion of the bottom surface of a recess provided lower in the substantially central portion (including the central portion) of the water accumulation portion 18. The upper surface 47a, the outer peripheral surface and the inner peripheral surface of the circulation drain chamber 46 are formed by the circulation drain profile 47. As shown in fig. 12, a washing water circulation upper suction port 48a (hereinafter, sometimes referred to as "upper suction port") formed of a plurality of holes is provided on an upper surface 47a of the circulation drain port profile 47. A cleaning water circulation inner peripheral suction port 48b (hereinafter, sometimes referred to as "inner peripheral suction port") formed of a plurality of holes is provided on the inner peripheral surface 47b of the circulation water discharge port profile 47. Hereinafter, when it is not necessary to distinguish between the surfaces provided with the washing water circulation upper suction port 48a and the washing water circulation inner suction port 48b, only the washing water circulation upper suction port 48a and the washing water circulation inner suction port 48b will be collectively referred to as "washing water circulation suction port 48". Here, the cleaning water circulation suction port 48 opens into a lower recess of the substantially central portion (including the central portion) of the water accumulation portion 18. The circulation drain chamber 46 communicates with the suction side of the wash pump 22 through the wash water circulation path 21.

The outer drain port profile 44 and the circulation drain port profile 47 are integrally formed of a resin such as polypropylene. The outer drain profile 44 and the circulation drain profile 47 are formed by members other than the water accumulation portion 18 of the cleaning tank 2.

Next, the structure of the circulation drain chamber 46 will be described with reference to fig. 11 and 12 with reference to fig. 14 to 19.

Fig. 14 is a top perspective view of the drain opening of the dish washing machine of the above embodiment. Fig. 15 is an exploded perspective view of the drain opening. Fig. 16 is a bottom perspective view, in section, of a major portion of the drain opening profile member of the drain opening.

As shown in fig. 11, 12, 14 and 15, the drain port 19 includes a drain port contour member 49 and a drain port bottom surface portion 18b, and the drain port contour member 49 is formed by integrally resin molding the outdoor drain port contour 44 and the circulation drain port contour 47, and the drain port bottom surface portion 18b is a part of the bottom surface of the water accumulation portion 18. The drain opening 19 is formed by fitting the drain opening profile member 49 to the drain opening bottom surface portion 18b from above at the outer peripheral portion thereof and fixing the same by screws from above. At this time, the outdoor drain chamber 43 is formed by the outdoor drain profile 44 and the drain bottom portion 18 b. Also, a circulation drain chamber 46 is formed by the circulation drain profile 47 and the drain bottom portion 18 b. The above-described wash water diffusing part 44d and the plurality of wash water drain suction inlets 45 are located at the center of the drain port 19.

The drain port profile member 49 is integrally formed with a circulation path introduction portion upper portion 21b and a drain path introduction portion upper portion 26b, the circulation path introduction portion upper portion 21b forming an upper portion of the circulation path introduction portion 21a of the wash water circulation path 21, and the drain path introduction portion upper portion 26b forming an upper portion of the drain path introduction portion 26a of the drain path 26. The drain bottom portion 18b is integrally formed with a circulation path introduction portion 21c and a drain path introduction portion 26c, the circulation path introduction portion 21c forming a lower portion of the circulation path introduction portion 21a of the washing water circulation path 21, and the drain path introduction portion 26c forming a lower portion of the drain path introduction portion 26a of the drain path 26. That is, the water drain hole 19 is formed by fixing the water drain hole profile member 49 to the water drain hole bottom surface portion 18b, and the circulation path introduction portion 21a and the water drain path introduction portion 26a are formed.

As shown in fig. 16, the drain profile member 49 has a plurality of rectifying ribs 47c radially provided continuously with the lower surface side of the upper surface 47a and the inner side of the inner peripheral surface 47b of the circulation drain profile 47. The plurality of rectifying ribs 47c are formed radially in the left and right directions of the holes of the upper suction port 48a and the holes of the inner peripheral suction port 48b in a direction substantially orthogonal to (including orthogonal to) the holes. With this configuration, the plurality of holes of the upper suction port 48a and the plurality of holes of the inner peripheral suction port 48b are arranged at positions corresponding to the plurality of radially arranged rectifying ribs 47c. That is, the plurality of rectifying ribs 47c, the plurality of holes of the upper suction port 48a, and the plurality of holes of the inner peripheral suction port 48b are arranged concentrically with the cleaning water diffusing part 44d and the plurality of cleaning water discharge suction ports 45.

Thus, the flow of the washing water flowing in from the holes of the upper suction port 48a and the holes of the inner peripheral suction port 48b and sucked into the washing water circulation path 21 is rectified by the rectifying rib 47c so as not to concentrate only on the portion (path) close to the circulation path introducing portion 21a, and to disperse as indicated by the arrow in fig. 17.

In the present embodiment, the angle of the plurality of rectifying ribs 47c radially arranged from the center, the angle of the holes of the upper suction port 48a and the holes of the inner peripheral suction port 48b are set to about 15 °, but the present invention is not limited thereto. For example, it may not be a constant angle. The rectifying rib 47c, the hole of the upper suction port 48a, and the hole of the inner peripheral suction port 48b may not be disposed over the entire circumference. Therefore, in the present embodiment, as shown in fig. 14, the holes of the upper suction port 48a and the holes of the inner peripheral suction port 48b are not arranged near the upper portion 26b of the drainage path introduction portion. In addition, the correspondence between the rectifying rib 47c and the holes of the upper suction port 48a and the holes of the inner peripheral suction port 48b may not be one-to-one.

The drain profile member 49 has a circumferential shielding rib 47d extending downward from the lower surface side of the upper surface 47a of the circulation drain profile 47. The shielding rib 47d is formed to connect the outer peripheral portions of the plurality of rectifying ribs 47c arranged radially. As shown in fig. 15, the height of the shielding rib 47d extending downward is set to be shorter than the height of the rectifying rib 47 c.

The shielding rib 47d guides the flow of the washing water flowing in from the hole of the upper suction port 48a and the hole of the inner peripheral suction port 48b to the downward (drain bottom surface portion 18 b) side and sucked into the washing water circulation path 21. Accordingly, even if the water level of the circulation drain chamber 46 is lowered by sucking the washing water by the washing pump 22, air is less likely to enter the flow of the washing water if the water level is higher than the lower end of the shielding rib 47d, and thus the occurrence of air entrainment by the washing pump 22 can be prevented.

As shown in fig. 15, the drain bottom portion 18b has a flow path control rib 18c erected in a circular arc shape in the vicinity of the circulation path introduction portion 21 c. The flow path control rib 18c is disposed so that a gap is formed between both end portions thereof and the outer wall 18ba of the drain bottom portion 18 b. A flow path through which the washing water sucked into the washing water circulation path 21 flows is ensured by the gap. The gap corresponds to two circulation path communication passages 63a and 63b (see fig. 17) described later. In a state where the drain 19 is constituted by the drain profile member 49 and the drain bottom surface portion 18b, the flow path control rib 18c is provided so as to face the circumferential shielding rib 47d of the circulation drain profile 47 with a substantially center (including the center) thereof being aligned.

The flow path control rib 18c controls the flow path of the cleaning water flowing from the hole of the upper suction port 48a and the hole of the inner peripheral suction port 48b to the suction port 61 and flowing out from the suction port 61 at a position close to the circulation path introduction portion 21a so as to detour toward the circulation path introduction portion 21a without short circuiting. Thereby, the cleaning water flows along the arc-shaped side surfaces of the flow path control ribs 18 c. Therefore, the flow path resistance to the washing water can be reduced, and the washing water can be smoothly guided to the washing water circulation path 21. The short-circuiting of the flow path means a state in which the cleaning water directly flows into the circulation path introduction portion 21a at the shortest distance from the suction port 61 near the circulation path introduction portion 21 a.

The structure of the circulation drain chamber 46 will be described in detail below with reference to fig. 17 to 19.

FIG. 17 is a top cross-sectional view of the drain opening of the dish washing machine. Fig. 18 is a view showing a section of fig. 14 taken along line 18-18. Fig. 19 is a view showing a section of fig. 14 taken along line 19-19.

As shown in fig. 17 to 19, the circulation drain chamber 46 includes a plurality of suction ports 61, a washing water circular flow path 62, and two circulation path communication flow paths 63a and 63b. The plurality of suction ports 61 are radially arranged continuously toward the inner peripheral surface 47b of the circulation drain profile 47. The cleaning water annular flow path 62 is provided in an annular shape around the outside of the plurality of suction ports 61. The two circulation path communication passages 63a and 63b communicate the washing water circulation passage 62 with the circulation path introduction portion 21 a.

Specifically, the intake port 61 is formed by the upper surface 47a of the circulation drain profile 47, the inner peripheral surface 47b of the circulation drain profile 47, two adjacent rectifying ribs 47c, a shielding rib 47d, and the bottom surface of the drain bottom surface portion 18 b.

A hole of the upper suction port 48a is arranged on the upper surface of the suction port 61. Holes of the inner peripheral suction port 48b are arranged on the inner peripheral surface of the suction port 61.

The height of the shielding rib 47d extending downward is shorter (lower) than the height of the rectifying rib 47c as described above. Thus, the outflow port 64 through which the washing water flows out from the suction port 61 toward the washing water circulation path 21 is formed below the shielding rib 47 d.

The washing water circular flow path 62 is formed by the shielding rib 47d, the outer wall of the drain profile member 49, the outer wall of the drain bottom surface portion 18b, the upper surface 47a of the circulation drain profile 47, and the bottom surface of the drain bottom surface portion 18 b.

The circulation path communication passages 63a, 63b are formed by gaps between both end portions of the passage control rib 18c and the outer wall 18ba of the drain bottom portion 18 b.

In addition, as will be described later, in a state where the residue filter 23 is attached to the drain port 19, the lower portion of the outer peripheral portion 51a of the 1 st filter 51 is inserted into the inner peripheral surface 47b of the circulation drain port contour 47.

The circulation drain chamber 46 is constructed as described above.

Next, the flow of the washing water at the drain port 19 during the washing and rinsing operations of the dish washing machine will be described with reference to fig. 17.

First, after the object 6 to be cleaned is cleaned or rinsed, the cleaning water falling down toward the upper surface 47a of the circulation drain profile 47 flows into the suction ports 61 at positions corresponding to the holes of the upper suction port 48a and the holes of the inner peripheral suction port 48 b. On the other hand, after the object 6 to be cleaned is cleaned or rinsed, the cleaning water falling into the residue filter 23 passes through the mesh-shaped holes 51b (see fig. 20) of the outer peripheral portion 51a of the 1 st filter 51, and then flows into the suction port 61 at a position corresponding to each hole from the hole of the inner peripheral suction port 48b or the hole of the upper suction port 48 a.

As indicated by arrow AA in fig. 17, the cleaning water flowing into the suction port 61 at a position close to the circulation path introduction portion 21a flows out from the outflow port 64 (see fig. 18) provided below the shielding rib 47 d. The flow of the washing water after flowing out is controlled by the flow path control rib 18c, and is sucked into the circulation path introduction portion 21a from the circulation path communication flow paths 63a and 63b located at both end portions of the flow path control rib 18 c. On the other hand, as shown by arrow BB in fig. 17, the washing water flowing into the suction port 61 at a position distant from the circulation path introduction portion 21a flows out from the outflow port 64 provided below the shielding rib 47 d. The washing water flowing out flows along the washing water circular flow path 62, and is sucked into the circulation path introduction portion 21a from the circulation path communication flow paths 63a and 63 b.

The washing water flowing into the drain port 19 flows along the above flow path, and is sucked into the circulation path introduction portion 21a to circulate.

Next, the structure of the residue filter 23 disposed in the drain port 19 will be described in detail with reference to fig. 20.

FIG. 20 is an exploded perspective view of a portion of the dish washer of the embodiment described above that is associated with a residue filter.

As shown in fig. 20, the residue filter 23 includes a 1 st filter 51, a 2 nd filter 52, and the like, the 1 st filter 51 being provided for forming an outer peripheral portion, and the 2 nd filter 52 being disposed inside the 1 st filter 51. In a state to be attached to the drain port 19, first, the 2 nd strainer 52 is inserted into the 1 st strainer 51. Thus, the 2 nd filter 52 is locked to the 1 st filter 51 and integrally formed. Then, the 1 st strainer 51 integrally formed with the 2 nd strainer 52 is locked and fixed to the drain port 19.

The 1 st filter 51 is formed in a substantially cylindrical shape (including a cylindrical shape) without a bottom. The cylindrical outer peripheral portion 51a is formed of a metal plate such as stainless steel, for example, and has a plurality of mesh-like holes 51b through which the cleaning water can flow in both directions.

The 2 nd filter 52 is formed of a resin material such as polypropylene into a substantially cylindrical shape with a bottom (including a bottomed cylindrical shape), for example, a bucket shape. Specifically, the 2 nd filter 52 includes a main body 52a, 1 handle 52c, and the like, the main body 52a is formed in a substantially cylindrical shape with a bottom, and the 1 handle 52c extends upward from the upper surface of the outer peripheral portion 52b of the main body 52 a.

When the 2 nd filter 52 is attached to or detached from the 1 st filter 51, the user holds the handle 52c with his or her hand and operates the handle 52c in the up-down direction. When the 1 st filter 51 and the 2 nd filter 52 are attached to and detached from the drain port 19 in a state where the 1 st filter 51 and the 2 nd filter 52 are integrated, the user holds the handle portion 52c with his or her hand and operates the handle portion 52c to horizontally rotate.

In a state where the 2 nd filter 52 is inserted inside the 1 st filter 51 so that both are integrated, the outer surface of the outer peripheral portion 52b of the 2 nd filter 52 is disposed so as to face the inner surface of the outer peripheral portion 51a of the 1 st filter 51. A plurality of holes 52d through which the cleaning water can flow in both directions are provided in the outer peripheral portion 52b of the main body 52 a. In this case, the size of the hole 52d is set larger than the hole 51b of the 1 st filter 51.

As shown in fig. 11, an umbrella-shaped 2 nd cleaning water diffusion portion 52f is formed in the bottom portion 52e of the 2 nd filter 52 so that its central portion bulges inward (upward). A plurality of circular arc-shaped slits 52g are formed around the 2 nd wash water diffusion portion 52f. The 2 nd wash water diffusing part 52f is provided at a position higher than the wash water circulation intake port 48 provided in the upper surface 47a of the circulation drain chamber 46 of the drain port 19.

In a state where the residue strainer 23 is attached to the drain port 19, the lower portion of the outer peripheral portion 51a of the 1 st strainer 51 is inserted into the inner peripheral surface of the circulation drain port 42 (the inner peripheral surface 47b of the circulation drain port contour 47) of the drain port 19. Thus, the cleaning water diffusion portion 44d provided in the drain port 19 is disposed inside the 1 st strainer 51 at a position above the lower end of the 1 st strainer 51. The bottom 52e of the 2 nd strainer 52 is disposed in the vicinity of the top of the cleaning water diffusion portion 44d of the outer drain port contour 44. That is, the 2 nd cleaning water diffusion portion 52f of the 2 nd filter 52 is arranged directly above the cleaning water diffusion portion 44d of the drain port 19.

The hole 51b is provided in the upper half of the outer peripheral portion 51a of the 1 st filter 51. Similarly, the hole 52d is provided in the outer peripheral portion 52b of the main body portion 52a of the 2 nd filter 52. That is, the holes 51b and 52d are provided facing the inside of the water accumulation portion 18 at positions higher than the upper surface 47a of the circulation drain profile 47.

The residue filter 23 disposed in the drain port 19 of the dish washing machine according to the present embodiment is configured as described above.

Next, the operation and operation of the dish washing machine configured as described above will be described.

First, the user pushes the door opening button 11 of the lower door 5. Thereby, the lock of the door lock device 12 is released, and the upper end 5b of the lower door 5 is opened slightly forward.

Next, the user pulls the lower door 5 forward and downward by putting his or her hand on the upper end 5b of the lower door 5. Thereby, the lower door body 5 is opened to the front lower side of the main body 1. At this time, the upper door 4 is also opened to the front lower side of the main body 1 in association with the lower door 5 by the door opening and closing mechanism 10. Then, the upper door body 4 and the lower door body 5 are opened to a substantially horizontal state in a state where the upper door body 4 is overlapped on the lower door body 5. Thereby, the opening 3 of the front surface of the cleaning tank 2 is opened forward.

Next, the user pulls out the lower basket 8 forward from the opening 3 of the open washing tub 2, and places the object 6 to be washed in the lower basket 8. The lower dish basket 8 of the present embodiment has a structure suitable for placing the objects 6 to be washed as described below. That is, chopsticks, forks, spoons, etc. are accommodated in a dedicated small item case 89 provided slightly to the right of the center of the lower cutlery basket 8. Relatively large tableware such as large trays and pulled-up bowls are accommodated on the right side of the small article case 89. A 3 rd placement basket 88, which is housed on the left side of the small article case 89, is a sea bowl, a small bowl, a middle dish, or the like.

Thus, when the placement of the objects 6 to be washed is completed in the lower basket 8, the user pushes the lower basket 8 into the washing tub 2 and stores the lower basket 8 in the washing tub 2.

Next, the user pulls out the upper basket 7 forward, and places the object 6 to be cleaned on the upper basket 7. The upper basket 7 of the present embodiment has a structure suitable for placing the objects 6 to be washed as described below. That is, the 1 st seating basket 78, which is received in the left side of the upper dish basket 7, is a rice bowl, a soup bowl, a small dish, etc. A 2 nd placement basket 79 for receiving cups, lunch boxes, bowls and the like on the right side of the upper cutlery basket 7.

Thus, when the placement of the objects 6 to be washed is completed in the upper basket 7, the user pushes the upper basket 7 into the washing tub 2, and stores the upper basket 7 in the washing tub 2.

Next, the user inputs an appropriate amount of detergent from a detergent input unit 90 (see fig. 8) provided in the lower dish basket 8 to the water accumulation unit 18 of the washing tub 2. Then, the user closes the upper door body 4 and the lower door body 5.

Then, the user turns on the power supply of the dish washing machine via the operation display unit 13, and inputs conditions such as an operation program and time. Then, after inputting the condition, the user presses the start button. Thus, the control unit starts the operation of the dish washing machine, and executes the washing step, the rinsing step, and the drying step in this order according to the input conditions.

Specifically, first, the control unit operates the water supply valve to supply a predetermined amount of washing water into the washing tub 2. When the water supply of the predetermined amount is completed, the control part closes the water supply valve and drives the washing pump 22, the heater 25, and the like. Thereby, the cleaning water is heated by the heater 25. The heated washing water is pressurized by the washing pump 22 and supplied to the water dividing portion. The supplied washing water is selectively branched from the water dividing portion and supplied to the 1 st rotary washing nozzle 14, the 2 nd rotary washing nozzle 15, the fixed washing nozzle 16, and the 3 rd rotary washing nozzle 17 communicating with the fixed washing nozzle 16.

The water diversion portion is operated to switch the supply of the washing water to, for example, the 1 st rotary washing nozzle 14, the 2 nd rotary washing nozzle 15, the fixed washing nozzle 16, and the 3 rd rotary washing nozzle 17 communicating with the fixed washing nozzle 16, in this order at predetermined intervals.

At this time, the 1 st rotary washing nozzle 14, the 2 nd rotary washing nozzle 15, and the 3 rd rotary washing nozzle 17 are rotated by reaction force when supplied washing water is discharged from the respective spray holes. In this way, the washing water that has moved in rotation is sprayed from the respective rotary washing nozzles, and the objects 6 stored in the lower dish basket 8 and the upper dish basket 7 are efficiently washed.

Further, the fixed washing nozzles 16 spray washing water to the upper dish basket 7 from the spray holes 16aa of the vertical portion 16a shown in fig. 4 provided above the upper dish basket 7. This effectively cleans the outer surface of the object 6 to be cleaned, such as a cup stored in the upper dish basket 7. In addition, the fixed washing nozzles 16 spray washing water mainly toward the right side of the upper basket 7 from the spray holes 16ba provided at the 1 st horizontal portion 16b below the upper basket 7. This effectively cleans the inner surface of the object 6 to be cleaned, such as a cup, which is stored in the 2 nd placement basket 79 of the upper dish basket 7 so as to be inclined downward. Similarly, the fixed washing nozzle 16 sprays washing water from the spraying holes 16ca arranged at the 2 nd horizontal portion 16 c. Thereby, the outer surface of the object 6 to be washed, such as a cup of the 2 nd placement basket 79 stored on the right side of the upper dish basket 7, is washed.

In addition, the 3 rd rotary washing nozzle 17 communicating with the fixed washing nozzle 16 sprays the rotary-moving washing water from directly under the 1 st seating basket 78 on the left side of the upper dish basket 7. This effectively cleans the inner and outer surfaces of the objects 6 to be cleaned, such as rice bowls, accommodated in the 1 st placement basket 78.

In the cleaning tank 2, the cleaning water sprayed from the 1 st rotary cleaning nozzle 14, the 2 nd rotary cleaning nozzle 15, the fixed cleaning nozzle 16, and the 3 rd rotary cleaning nozzle 17 communicating with the fixed cleaning nozzle 16 cleans the object 6 to be cleaned, flows down to the water accumulation portion 18 in the lower portion of the cleaning tank 2, and is collected in the water discharge port 19. The concentrated washing water is again sucked by the washing pump 22 to pass through the residue filter 23. The cleaning water having passed through the residue filter 23 is heated by the heater 25 and supplied again to each cleaning nozzle.

At this time, the residue detached from the object 6 to be cleaned by the sprayed cleaning water is collected by the water accumulation portion cover 20 and the residue filter 23.

In addition, the dish washing machine of the present embodiment detects the temperature of the washing water using the temperature sensor 29. When the temperature of the cleaning water exceeds a predetermined temperature (for example, about 60 ℃), the control unit stops the energization of the heater 25. Thereby, the cleaning water is always maintained at a temperature suitable for cleaning.

According to the above, when the washing step for a predetermined time is completed, the washing water containing dirt is discharged to the outside by the drain pump 27. The control unit operates the water supply valve to supply new washing water into the washing tub 2. The supplied washing water is pressurized by the washing pump 22. The pressurized washing water is supplied to the 1 st rotary washing nozzle 14, the 2 nd rotary washing nozzle 15, the fixed washing nozzle 16, and the 3 rd rotary washing nozzle 17 communicating with the fixed washing nozzle 16. The supplied cleaning water is sprayed from the spray holes of the respective cleaning nozzles. Thereby, the control unit performs a rinsing step of rinsing the detergent, the residue, and the like adhering to the object 6 to be cleaned.

Then, the control part executes the rinsing action of the rinsing step for a predetermined time. The control unit discharges the washing water containing the detergent and the residue washed out of the object 6 by the rinsing operation to the outside by the drain pump 27. Then, the control part supplies new washing water into the washing tub 2 again, and performs a rinsing operation. In addition, in the case of the rinsing step set in the standard, 3 rinsing actions are performed, and the washing water is discharged to the outside by the drain pump 27. Thereby, the rinsing step ends.

Here, the flow of the cleaning water around the residue filter 23 and the drain port 19 during the cleaning operation and the rinsing operation will be described with reference to fig. 21.

Fig. 21 is an explanatory view showing the flow of the washing water around the residue filter 23 and the drain port 19 during the washing operation and the rinsing operation of the dish washing machine.

As shown in fig. 21, when the cleaning operation and the rinsing operation are performed, first, the cleaning water stored in the water accumulation portion 18 is sucked by the cleaning pump 22. The sucked washing water is sucked into the washing water circulation path 21 from the washing water circulation suction port 48 formed by a plurality of holes provided in the upper surface 47a of the circulation drain profile 47.

At this time, as described above, the cleaning water circulation suction port 48 is circumferentially provided outside the residue filter 23. The cleaning water circulation suction port 48 is provided at a position lower than most of the holes 51b and 52d of the 1 st and 2 nd filters 51 and 52. The cleaning water circulation suction port 48 is provided at a position lower than the 2 nd cleaning water diffusion portion 52f of the 2 nd filter 52. With this configuration, the cleaning water flows along a path substantially as indicated by an arrow C in fig. 21 when the cleaning operation and the rinsing operation are performed. That is, the washing water flows from the inner side to the outer side substantially at the holes 51b of the 1 st filter 51 and the holes 52d of the 2 nd filter 52.

Subsequently, the larger residues among residues and dirt contained in the circulated washing water are collected by the 2 nd filter 52, and fine leftovers and dirt are collected by the 1 st filter 51. At this time, particularly, dirt contained in the washing water adheres to the inner peripheral surface of the 1 st filter 51.

Here, the flow of the washing water sucked into the washing water circulation path 21 through the washing water circulation suction port 48 is described above with reference to fig. 17, and will be described again below.

First, as shown in fig. 17, the cleaning water flowing in through the cleaning water circulation suction port 48 to the suction port 61 (see fig. 18) at a position close to the circulation path introduction portion 21a flows out through the outflow port 64 provided below the shielding rib 47 d. The flow-out washing water is controlled in flow passage by the flow passage control rib 18 c. Thereby, the washing water is sucked into the circulation path introduction portion 21a from the circulation path communication passages 63a, 63b located at the end portions of the passage control rib 18 c. On the other hand, the cleaning water flowing in through the cleaning water circulation suction port 48 to the suction port 61 at a position distant from the circulation path introduction portion 21a flows out through the outflow port 64 provided below the shielding rib 47 d. The washing water flowing out flows along the washing water circular flow path 62, and is sucked into the circulation path introducing portion 21a from the circulation path communicating flow paths 63a and 63 b.

In this case, in the case where the shielding rib 47d of the present embodiment is not provided, dirt tends to be concentrated on a portion of the inner peripheral surface of the 1 st filter 51, which portion is closer to the cleaning water circulation path 21. In the present embodiment, a plurality of suction ports 61 for sucking the washing water into the washing water circulation path 21 are radially arranged at the outer peripheral position of the 1 st filter 51, in addition to the shielding rib 47 d. Further, a cleaning water diffusion portion 44d provided in the drain port 19 and a 2 nd cleaning water diffusion portion 52f provided in the 2 nd filter 52 are arranged. Thereby, the washing water sucked into the drain port 19 is uniformly spread over the entire circumference. As a result, the adhesion of fine residues and dirt to a part of the inner peripheral surface of the 1 st filter 51 can be suppressed. Thus, the 1 st filter 51 is prevented from clogging in a short time.

In the present embodiment, a plurality of suction ports 61 for sucking the washing water into the washing water circulation path 21 are radially arranged. Further, a flow path control rib 18c is erected in the vicinity of the circulation path introduction portion 21 a. This effectively disperses the flow of the washing water without concentrating on the portion near the circulation path introduction portion 21 a. As a result, the washing water can be smoothly sucked into the washing water circulation path 21 for a long period of time.

In the present embodiment, the cleaning water diffusion portion 44d of the drain port 19 and the 2 nd cleaning water diffusion portion 52f of the 2 nd filter 52 of the residue filter 23 are formed in an umbrella shape. Therefore, the washing water falling into the residue filter 23 and flowing into the suction port 61 from the washing water circulation inner peripheral suction port 48b through the mesh-shaped holes 51b of the outer peripheral portion 51a of the 1 st filter 51 is radially diffused by the umbrella-shaped washing water diffusion portion 44d and the 2 nd washing water diffusion portion 52 f. This suppresses the concentrated adhesion of fine residues and dirt to a part of the inner peripheral surface of the 1 st filter 51. In addition, the flow of the washing water is effectively dispersed without being concentrated in the portion near the circulation path introduction portion 21 a. This allows the cleaning water to be more smoothly sucked into the cleaning water circulation path 21.

In the present embodiment, the flow of the washing water sucked into the washing water circulation path 21 from the suction inlet 61 is guided downward by the shielding rib 47 d. Accordingly, even if the water level of the circulation drain chamber 46 is lowered by sucking the washing water by the washing pump 22, air is less likely to enter the flow of the washing water as long as the water level is higher than the lower end of the shielding rib 47d, and therefore, the occurrence of air entrainment by the washing pump 22 can be prevented.

According to the above, when the rinsing step is finished, the control part performs the drying step. In the drying step, the control unit operates the drying device 30, and supplies air into the cleaning tank 2 via the built-in blower fan 31. At this time, the external air supplied to the drying device 30 is heated by the heater. This promotes evaporation of water droplets adhering to the object 6 to be cleaned by utilizing both the effects of air blowing and heating. After the drying operation is performed for a predetermined time, the control unit stops the operation of the drying device 30 to end the drying step. Thereby, all the steps of cleaning the object 6 to be cleaned are completed, and execution of the selected operation program is completed.

The dish washing machine of the present embodiment operates as described above, and functions.

As described above, the dish washing machine of the present embodiment includes: a main body 1; a washing tub 2 provided in the main body 1 and configured to house objects to be washed 6 such as tableware; a cleaning nozzle such as a rotary cleaning nozzle 14 for cleaning the object 6 stored in the cleaning tank 2; and a drain port provided at the bottom of the cleaning tank 2. In addition, the dish washing machine includes: a washing pump 22 for feeding washing water in the washing tub 2 to a washing nozzle such as the 1 st rotary washing nozzle 14; a washing water circulation path 21 which communicates the drain port 19 with the washing pump 22; and a residue filter 23 detachably fixed to the drain port 19. The drain port 19 has a circulation drain chamber 46 having a circular main portion, and a plurality of suction ports 61 for sucking the washing water from the drain port 19 into the washing water circulation path 21 are radially arranged in the circulation drain chamber 46.

With this structure, the flow of the washing water flowing into the circulation drain chamber 46 of the drain port 19 can be effectively dispersed without being concentrated in the portion close to the washing water circulation path 21. Therefore, the cleaning water can be smoothly sucked into the cleaning water circulation path 21. This can improve the concentration of the flow of the washing water sucked from the drain port 19 to the washing water circulation path 21. As a result, the cleaning force can be maintained, and the frequency of cleaning the residue filter 23 can be reduced.

The plurality of radially arranged suction ports 61 are radially provided with a plurality of rectifying ribs 47c in the circulation drain chamber 46. With this structure, the flow of the cleaning water flowing into the circulation drain chamber 46 can be rectified with a simple structure. This allows the washing water to flow in an effectively dispersed manner without concentrating on the portion near the washing water circulation path 21. As a result, the washing water can be smoothly sucked into the washing water circulation path 21.

Further, shielding ribs 47d for guiding the flow of the sucked cleaning water downward are provided in the plurality of radially arranged suction ports 61. With this configuration, the flow of the washing water sucked into the washing water circulation path 21 from the suction port 61 can be guided downward. This can prevent the purge pump 22 from being involved in the gas.

A plurality of washing water circulation upper suction ports 48a are circumferentially provided at the upper portion of the circulation drain chamber 46, and the washing water circulation upper suction ports 48a are disposed at positions corresponding to the plurality of suction ports 61. With this structure, the washing water falling onto the upper portion of the circulation drain chamber 46 can be caused to flow into the respective suction ports 61. This makes it possible to effectively disperse the flow of the washing water without concentrating on the portion near the washing water circulation path 21.

The circulation drain chamber 46 has a plurality of cleaning water circulation inner peripheral suction ports 48b on the inner periphery, and the cleaning water circulation inner peripheral suction ports 48b are arranged at positions corresponding to the plurality of suction ports 61. With this configuration, the cleaning water having passed through the residue filter 23 can be flowed into each suction port 61. This makes it possible to effectively disperse the flow of the washing water without concentrating on the portion near the washing water circulation path 21. In addition, by making the cleaning water diffusing part 44d of the drain port 19 and the 2 nd cleaning water diffusing part 52f of the residue filter 23 cooperate, the cleaning water can be more effectively dispersed and flowed into the respective suction ports 61.

The circulation drain chamber 46 has a flow path control rib 18c in the vicinity of a portion communicating with the washing water circulation path 21. With this configuration, the flow path of the washing water flowing out from the suction port 61 at a position close to the washing water circulation path 21 is controlled so as to detour toward the washing water circulation path 21 without short-circuiting. This allows the cleaning water to flow along the arc-shaped side surfaces of the flow path control ribs 18c. As a result, the resistance with the flow path control rib 18c can be reduced, and the washing water can be efficiently guided to the washing water circulation path 21.

At least a part of the flow path control rib 18c is located on a straight line connecting the center of the circulation drain chamber 46 whose main portion is formed in an annular shape and a portion of the circulation drain chamber 46 communicating with the washing water circulation path 21. With this configuration, the flow path of the washing water can be controlled reliably so that the washing water bypasses toward the washing water circulation path 21 without short-circuiting.

As described above, the dish washing machine of the present invention includes: a main body; a cleaning tank provided in the main body for accommodating the object to be cleaned; a cleaning device for cleaning an object to be cleaned; and a water outlet arranged at the bottom of the cleaning tank. In addition, the dish washing machine includes: a washing pump for delivering washing water in the washing tank to the washing device; a washing water circulation path communicating the drain port and the washing pump; and a residue filter detachably fixed to the drain port. The drain port has a circular drain chamber with a main portion formed in a circular shape, and a plurality of suction ports for sucking the washing water from the drain port to the washing water circulation path are radially arranged in the circular drain chamber.

With this structure, the flow of the washing water flowing into the circulation drain chamber of the drain port can be effectively dispersed without being concentrated on the portion close to the washing water circulation path. Therefore, the cleaning water can be smoothly sucked into the cleaning water circulation path. This can improve the concentration of the flow of the washing water sucked from the drain port to the washing water circulation path. As a result, it is possible to provide a dish washer that maintains the cleaning power and reduces the frequency of cleaning the residue filter.

In the dish washing machine of the present invention, the plurality of radially disposed air inlets may be formed with a plurality of rectifying ribs radially disposed in the circulation drain chamber. With this structure, the flow of the cleaning water flowing into the circulation drain chamber can be rectified with a simple structure. This allows the washing water to flow in an effectively dispersed manner without concentrating on a portion close to the washing water circulation path. As a result, the washing water can be smoothly sucked into the washing water circulation path.

In the dish washing machine of the present invention, a shielding rib may be provided in the plurality of radially arranged suction ports to guide downward the flow of the sucked washing water. With this configuration, the flow of the washing water sucked from the suction port into the washing water circulation path can be guided downward. This can prevent the purge pump 22 from being involved in the gas.

In the dish washing machine of the present invention, the circulating drain chamber may have a plurality of upper suction ports formed in a circumferential shape at an upper portion thereof, and the upper suction ports may be disposed at positions corresponding to the plurality of suction ports. With this structure, the washing water falling onto the upper part of the circulation drain chamber can be caused to flow into each suction port. This makes it possible to effectively disperse the flow of the washing water without concentrating on a portion close to the washing water circulation path.

In addition, the circulation drain chamber of the dish washing machine of the present invention may have a plurality of inner peripheral suction ports at the inner periphery thereof, and the inner peripheral suction ports may be disposed at positions corresponding to the plurality of suction ports. With this configuration, the cleaning water having passed through the residue filter can be flowed into each suction port. This makes it possible to effectively disperse the flow of the washing water without concentrating on a portion close to the washing water circulation path. In addition, by making the water outlet and the cleaning water diffusion part of the residue filter cooperate together, the cleaning water can be more effectively dispersed and flow into each suction inlet.

In addition, the circulation drain chamber of the dish washing machine of the present invention may have a flow path control rib in the vicinity of a portion communicating with the washing water circulation path. With this configuration, the flow path of the washing water flowing out from the suction port at a position close to the washing water circulation path is controlled so as to detour toward the washing water circulation path without short-circuiting. This allows the washing water to flow along the circular arc-shaped side surfaces of the flow path control ribs, and as a result, the resistance with the flow path control ribs 18c can be reduced, and the washing water can be efficiently guided to the washing water circulation path.

In the dish washing machine of the present invention, at least a part of the flow path control rib may be located on a straight line connecting a center of the circular circulation drain chamber and a portion of the circulation drain chamber communicating with the washing water circulation path. With this configuration, the flow path of the washing water can be controlled reliably, so that the washing water can detour toward the washing water circulation path without short-circuiting.

Industrial applicability

The invention provides a dishwasher which can improve the flow of washing water sucked from a water outlet to a washing water circulation path, maintain the washing force and reduce the cleaning frequency of a residue filter. Therefore, the present invention is useful as a household dish washer or the like to be placed on an operation surface or the like of a kitchen.

Claims

1. A dish washing machine, wherein,

the dish washing machine includes:

a main body;

a cleaning tank provided in the main body for accommodating an object to be cleaned;

a cleaning device for cleaning the object to be cleaned;

a water outlet arranged at the bottom of the cleaning tank;

a washing pump that supplies washing water in the washing tub to the washing device;

a washing water circulation path communicating the drain port and the washing pump; and

a residue filter detachably fixed to the drain port,

the drain port has a circulation drain chamber having a main portion formed in a circular ring shape,

a plurality of suction ports for sucking the washing water from the water discharge port to the washing water circulation path are radially arranged in the circulation drain chamber,

the plurality of radially arranged suction ports are radially provided with a plurality of rectifying ribs in the circulation drain chamber.

2. A dish washing machine, wherein,

the dish washing machine includes:

a main body;

a cleaning device for cleaning the object to be cleaned;

a water outlet arranged at the bottom of the cleaning tank;

a residue filter detachably fixed to the drain port,

a shielding rib for guiding the flow of the sucked cleaning water downward is arranged at the plurality of suction ports arranged radially.

3. The dish washing machine according to claim 1 or 2, wherein,

the circulating drain chamber is formed by a circulating drain outlet contour and a drain outlet bottom surface portion,

the plurality of suction ports are arranged radially on the outline of the circulation drain port.

4. A dish washing machine, wherein,

The dish washing machine includes:

a main body;

a cleaning device for cleaning the object to be cleaned;

a water outlet arranged at the bottom of the cleaning tank;

a residue filter detachably fixed to the drain port,

the circulation drain chamber has a flow path control rib in the vicinity of a portion communicating with the washing water circulation path.

5. The dish washing machine as claimed in any one of claims 1, 2, 4, wherein,

a plurality of upper suction ports are circumferentially arranged at the upper part of the circulating water discharge chamber,

the upper suction port is disposed at a position corresponding to the plurality of suction ports.

6. The dish washing machine as claimed in any one of claims 1, 2, 4, wherein,

The circulating drain chamber has a plurality of inner periphery suction ports at an inner periphery,

the inner peripheral suction ports are arranged at positions corresponding to the plurality of suction ports.

7. The dish washing machine as claimed in claim 4, wherein,

at least a part of the flow path control rib is disposed on a straight line connecting a center of the circulation drain chamber having a main portion formed in a circular shape and a portion of the circulation drain chamber communicating with the washing water circulation path.

8. The dish washing machine as claimed in claim 7, wherein,

the plurality of suction ports are arranged radially on the outline of the circulation drain port,

the flow path control rib is provided near a portion of the drain port bottom portion of the circulation drain chamber communicating with the washing water circulation path,

the flow path control rib is configured to detour the washing water flowing out from the suction port at a position close to the washing water circulation path toward either one of both ends of the flow path control rib and flow toward the washing water circulation path.