JP2003339612A - Dishwasher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To rinse dishes with clean water being not in contact with leftovers trapped by a leftover filter after falling from the dishes during washing. <P>SOLUTION: The leftover filter 21 is provided at a position over the washing water channel 13 of a water storage tank 7 to trap the leftovers from water pumped by a washing pump. An opening part 22 for discharging leftovers is formed at a position over a drain water channel 14 of the water storage tank 7 to allow the leftovers to pass through the opening part 22 with water pumped by a drain pump. Thus, the leftover fallen from the dishes during washing are discharged to the outside of the dishwasher from the opening part 22 during draining through the water storage tank 7 and the water channel 14 and leftover is removed, thereby the dishes can be rinsed with the clean water being not in contact with the leftover. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher having an improved structure for treating residues.

[0002]

2. Description of the Related Art Conventionally, in a dishwasher, a water storage tank provided at the bottom of a washing tank is equipped with a residue filter so that the residue dropped from the dishes at the time of cleaning is not discharged to the outside of the machine. I have to.

[0003]

The washing of dishes with a dishwasher includes "washing" by washing with water containing detergent and "rinsing" by washing with water containing no detergent. The residue captured by the above-mentioned residue filter is dropped from the dishes by "washing", and the captured residue remains on the residue filter at the subsequent "rinsing". For this reason, "rinsing" is performed with the water that has passed through the remaining residue and passed through the residue filter, and the finer residue of the residue reattaches to the dishes, which impairs the dishwashing finish. Had.

The present invention has been made in view of the above-mentioned circumstances, and therefore an object thereof is to perform rinsing with clean water that does not touch the residue, and to improve the finish of dish washing. To provide a washing machine.

[0005]

In order to achieve the above object, the dishwasher of the present invention comprises a washing tank, a water storage tank provided under the cleaning tank, and one end of which is connected to the water storage tank. A cleaning water channel, a cleaning pump connected to the other end of the cleaning water channel for cleaning dishes in the cleaning tank, a drainage water channel having one end connected to the water storage tank, and another drainage water channel. A drainage pump connected to an end portion for draining water from the cleaning tank to the outside of the machine is provided, and a residue is provided from the water sucked by the cleaning pump provided at a position on the cleaning water channel of the water storage tank. A residue filter for capturing, and a residue discharge opening provided at a position on the drainage water channel of the water storage tank and allowing the residue to pass through together with water sucked by the drainage pump. That (the invention of claim 1).

[0006] According to this, since the residue left over from the dishes during washing can be discharged to the outside of the machine through the water storage tank and the drainage water channel from the residue discharge opening by the drainage pump during drainage. Therefore, it becomes possible to perform rinsing with clean water that does not touch the residue.

In this case, it is preferable that the residue filter is gradually lowered toward the residue discharging opening (the invention of claim 2).
In this case, the residue trapped by the residue filter easily flows into the residue discharging opening according to the gradually descending structure of the residue filter, thereby improving the efficiency of discharging the residue.

The descending angle of the residue filter is preferably about 15 degrees or more (the invention of claim 3). In this case, the residue captured by the residue filter is more likely to flow to the residue discharging opening according to the descending angle of the residue filter, so that the efficiency of discharging the residue is further improved.

Furthermore, it is preferable that the residue filter is subjected to a water repellent treatment (the invention of claim 4). With this product, the water repellent effect of the residue filter makes it easier for water to flow over the residue filter, so that the residue captured by the residue filter also easily flows into the residue discharge opening, and the discharge efficiency of the residue still remains. Will get better.

In addition, it is preferable that water is poured from the side of the residue filter opposite to the residue discharge opening side to the residue discharge opening side (the invention of claim 5). With this one, with the water flowing on the residue filter toward the residue discharge opening side,
The residue on the residue filter also flows to the residue discharge opening, thereby improving the efficiency of discharging the residue.

Further, in this case, it is preferable that a water injector is provided on the opposite side of the residue filter from the residue discharge opening side, and the water injector is connected to the water supply valve by a connecting pipe (the invention of claim 6).
In this case, at the time of water supply, the water supplied through the water supply valve can be made to flow from the water injector over the residue filter toward the residue discharge opening side, thereby improving the efficiency of discharging the residue.

On the other hand, a guide may be provided in the cleaning tank for guiding the water in the cleaning tank to the side of the residue filter opposite to the residue discharge opening side (the invention of claim 7). In this one,
The water in the cleaning tank at the time of water supply or cleaning is guided by a guide to the side opposite to the residue discharge opening side of the residue filter, and flows over the residue filter toward the residue discharge opening side, thereby discharging the efficiency of the residue. You can improve

Then, it is preferable to have a residue discharge step which is executed by water supply and drainage after the step of drainage (the invention of claim 8). In this case, the residue on the residue filter can be discharged not only in the drainage process but also in the subsequent residue discharge process.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. First, FIG.
1 shows the overall structure of the dishwasher, in which a washing tank 2 is arranged inside an outer box 1. The front surface of this washing tank 2 is opened as a tableware entrance / exit 3, and the tableware entrance / exit 3
Is opened and closed by, for example, a door 4 which is divided into upper and lower parts.

A dish basket 5 is housed inside the washing tank 2 so that it can be taken in and out from the dish inlet / outlet 3, and a fountain arm 6 is rotatably supported below the dish basket. At the lower part on the front side of the cleaning tank 2, a water storage tank 7 is provided so as to hang further downward, and this is connected to a pump 8 arranged at an outer lower portion of the cleaning tank 2 by a connecting pipe 9.

As shown in detail in FIGS. 4 to 6, the connecting pipe 9 has a relatively flat rectangular tubular shape in which an intermediate portion 9a is horizontally placed, and both end portions 9b and 9c are vertically erected. It has a short cylindrical shape as described above, and the upper portions of both ends 9b and 9c are connection portions 10 and 11, respectively.

Further, from the lower part of one end 9b of the connecting pipe 9 to the middle part 9a and the lower part of the other end 9c, the insides thereof are front and rear sides in FIG. 4 (lower side and upper side in FIG. 5). ) Is formed over the entire length so that the inside of the connection pipe 9 is the cleaning water channel 13 on the front side in FIG.
And the drainage channel 14 on the back side. In this case, the cleaning water channel 13 is set larger than the drainage channel 14.

Further, a fixed inner lid wall 15 is integrally formed flush with the upper wall of the intermediate portion 9a inside the upper and lower portions of the other end 9c of the connecting pipe 9, and the inner lid wall 15 is Washing water channel 13
And a drainage outlet 16 that communicates with the drainage channel 14, and a drainage outlet 17 that communicates with the drainage channel 14.

In addition, the partition wall 12 has an intermediate portion 9a.
A slit-shaped communication hole 18 is formed in, for example, two central portions of the portion located inside, whereby the cleaning water channel 13 and the drainage water channel 14 are partially communicated with each other, and the cleaning water channel 13 and the drainage water channel 14 after cleaning are formed. The remaining water is discharged to the area. As for the water channel 13 for cleaning and the water channel 14 for drainage, as shown in FIG. 7, the bottom surface 14a of the water channel 14 for drainage is formed lower than the bottom surface 13a of the water channel 13 for cleaning by a dimension S so that the residual water is discharged more reliably. To be done.

In the connecting pipe 9 thus formed, as shown in FIG. 4 as well as FIG. 6, the connecting portion 10 is provided with an annular packing at the lower end portion 7a of the water storage tank 7 having a short cylindrical shape. The connection portion 11 is connected by fitting through 19
Is connected to the lower end portion 8a of the pump 8 which is also in the form of a short cylinder through an annular packing 20.

Further, the lower end portion 7a of the water storage tank 7 is fully opened at the lower end, whereby the water storage tank 7 is connected to the respective one end portions of the cleaning water passage 13 and the drainage water passage 14 to communicate with each other. ing. The water storage tank 7 also has an inner lower portion (inside the lower end portion 7 a) having a water channel 13 for cleaning the connection pipe 9.
Similarly to the drainage waterway 14, the partition wall 7b (see FIG. 1) divides the cleaning waterway side portion 7c and the drainage waterway side portion 7d into two parts. Therefore, the cleaning waterway 13 communicates with the cleaning waterway side portion 7c. The drainage waterway 14 communicates with the drainage waterway side portion 7d.

1 and 2, the water storage tank 7 is shown.
2 shows a residue filter 21 provided at a position on the washing water channel 13 (left side in the drawing) and an opening 22 for discharging residue provided at a position on the drainage water channel 14 of the water storage tank 7 (right side in the drawing). . Of these, the residue filter 21 is used for the cleaning water channel 1
3 has a size that covers most of the opening on the upper surface of the water storage tank 7 according to the size of the water storage tank 7, and is composed of a flat plate having a large number of small holes 21a that do not pass small residues of rice grain size. ing.

On the other hand, the residue discharge opening 22 is formed by a funnel-shaped member 23 having a size that covers the remaining part of the opening on the upper surface of the water storage tank 7 according to the size of the drainage water channel 14. The filter 21 is adapted to pass through a residue that is sufficiently larger than each of the small holes 21a, for example, a rice grain size or larger. In addition, the opening 22 for discharging the residue
As shown in FIG. 1, the funnel-shaped member 23 directly communicates with the drainage waterway side portion 17d in the lower portion of the water storage tank 7 and isolates it from other portions in the water storage tank 7.

The residue filter 21 has an inclined shape that gradually descends toward the residue discharge opening 22, and the descending angle θ is about 15 degrees or more. Further, the residue filter 21 is subjected to a water repellent treatment 24. This water-repellent treatment 24 is made by making the residue filter 21 of metal and applying a fluororesin film or polymer film on the surface, or by making the residue filter 21 of synthetic resin and mixing fluorine in the synthetic resin material. And the like.

The residue discharge opening 22 of the residue filter 21
A water injector 25 is provided on the side opposite to the side. This water injector 25 has a substantially rectangular box shape, has a water injection port 25a on the residue filter 21 side at the lower end, and a connection port 2 on the upper rear surface.
5b. In addition, as shown in FIG.
Has a depth equal to or greater than the depth of the residue filter 21 and has a plurality of water injection ports 25a in the depth direction (details not shown).

However, in addition to the above, FIG.
2 shows a water supply valve 26 disposed at the outer lower portion of the water supply valve 26. The water supply valve 26 is connected to a water injector 25 by a connection pipe 27 connected to the connection port 25b. The water supply valve 26 is connected by a water supply hose 28 to a water supply source (not shown), for example, a water tap. Further, as is apparent from FIG. 2, the two fountain arms 6 are provided side by side, and below the fountain arms 6 and at a lateral position of the residue filter 21 and the residue discharge opening 22 (right side in the figure). Is provided with a heater 29 for generating hot water and hot air.

On the other hand, as shown in FIG. 8, the pump 8 comprises a drive motor 33 attached to the outside of a casing 32 which houses a cleaning impeller 30 and a drainage impeller 31. The rotating shaft 33a has a tip portion protruding into the inside of the casing 32, and the cleaning impeller 30 and the drainage impeller 31 are attached to the protruding portion.

Therefore, the cleaning impeller 30 and the drainage impeller 31 are rotationally driven by the rotary shaft 33a of the drive motor 33, but their functioning rotational directions are opposite to each other.
That is, in this case, for example, when rotated clockwise, the cleaning impeller 30 functions to absorb and discharge water, and when rotated counterclockwise, the drain impeller 31 functions to absorb water. It is supposed to spit water. That is, in the case of this configuration, the pump 8 functions both as a cleaning pump and also as a drainage pump by switching. The casing 3
A partition wall 34 is provided between the cleaning impeller 30 and the drainage impeller 31 in the second section.

The casing 32 has a cleaning suction port 32a and a drainage suction port 32b in its lower part, and a cleaning discharge port 32c and a drainage discharge port 32d in its side part. Of the cleaning suction port 32a of the drainage impeller 31 from the central opening 31a of the drainage impeller 31 to the cleaning impeller 30 through the central opening 34a of the partition wall 34, and the drainage suction port 32b.
Is the opening 3 of the enclosure wall 35 surrounding the drainage impeller 31.
It faces the drainage impeller 31 through 5a.

The lower end 8a of the pump 8
Surrounds the cleaning suction port 32a and the drainage suction port 32b, and the lower end portion 8a is connected to the connecting pipe 9 as described above.
By connecting the connection portion 11 of the
The water outlet 16 for cleaning is fitted and communicated with 2a (see FIG. 6), and thus the cleaning pump portion of the pump 8 is connected to the other end of the water channel 13 for cleaning. Also, the drainage inlet 32b
The drainage outlet 17 is fitted into and communicates with,
The drainage pump portion of the pump 8 is connected to the other end of the drainage waterway 14. Further, as a result, the drainage inlet 32b
Is located near the bottom of the drainage channel 14 (see FIG. 7).

On the other hand, one end of a water pipe 36 is connected to the cleaning outlet 32c of the pump 8 as shown in FIG.
The fountain arm 6 is connected to the other end of the water pipe 36. A drain hose 37 is connected to the drain outlet 32d of the pump 8. The drain hose 37 has its tip located outside the outer box 1 from the lower part of the back of the outer box 1, but the midway portion 37a is raised above the normal stored water level of the cleaning tank 2.

At the bottom of the back of the cleaning tank 2, a water level detecting device 3 is provided.
8 are provided. In the water level detecting device 38, the case 39, which is the main body of the water level detecting device 38, communicates with the connecting pipe 9 and, in particular, the drainage water passage 14 through the connection hose 40. A switch that communicates with the inside and stores water in the case 39 in the same manner as in the cleaning tank 2 and that responds to the floating of a float (not shown) floating in the case 39 (also not shown). ).

However, as shown in FIG. 9, the drainage hose 37 is connected to the water level detecting device 38 at an intermediate portion 37a.
To communicate with the inside of the case 39 by a water passage with a branch hose 41, so that the dirty water entering the case 39 is washed out by a part of the wastewater every time washing is performed, and the dirt containing the dirty water is not left in the case 39. I have to. In addition, FIG. 3 shows a control device 42 provided inside the lower front surface of the outer box 1, and the control device 42 controls the overall operation of the dishwasher. Further, FIG. 3 also shows a fan 43 for supplying air into the cleaning tank 2.

Next, the operation of the above structure will be described. FIG. 10 shows a stroke executed when the above-described structure is operated, and the “water supply” stroke is first executed. This "water supply" step is performed by opening the water supply valve 26, whereby the water supply hose 2 is supplied from a water supply source (not shown).
The water supplied through 8 passes through the connecting pipe 27 and the water injector 2
5, and is made to flow on the residue filter 21 from the water injection port 25a of the water injection device 25.

The water flown on the residue filter 21 then reaches the water storage tank 7 through the small holes 21a of the residue filter 21 and the residue discharge opening 22, and fills the cleaning water channel 13 and the drainage water channel 14, respectively. Then, the water tank 7 is filled to raise the water level in the cleaning tank 2, and the water level is also raised in the case 39 of the water level detecting device 38 from the drainage water passage 14 through the connection hose 40. Therefore,
In the water level detection device 38, a prescribed water level is reached, and a switch (not shown) is actuated to close the water supply valve 26 and stop the water supply.

In the next "washing" step, the pump 8 is rotated in the direction in which the washing impeller 30 functions and the heater 29 is caused to generate heat. As a result, the water in the cleaning tank 2
From the small holes 21a of the residue filter 21, through the water storage tank 7, and further through the cleaning water passage 13, the cleaning impeller 30 is sucked, and then is pumped from the water distribution pipe 36 to the fountain arm 6, and there are a plurality of fountain ports of each fountain arm 6. 6a
(See FIG. 2) It is jetted into the cleaning tank 2 and is heated by the heater 29 to be warmed. At this time, the fountain arm 6 is also rotated by the reaction of the fountain.

At this time, the detergent is set in advance at a predetermined location in the cleaning tank 2 by the user, and the detergent is discharged by the fountain and contained in the water. Thus, the dishes (not shown) arranged in the dish basket 5 are washed with the water (hot water) containing the detergent. Further, at this time, the dregs dropped from the tableware are captured by the dregs filter 21 when the water ejected into the cleaning tank 2 passes through the small holes 21 a of the dregs filter 21, and remains on the dregs filter 21.

In the next "drainage" step, the pump 8 is rotated in the direction in which the drainage impeller 31 functions. As a result, the water in the cleaning tank 2 is sucked from the residue discharge opening 22 through the water storage tank 7 and further through the drainage water passage 14 to the drainage impeller 31 and discharged through the drainage hose 37 to the outside of the machine. Further, at this time, the residue remaining on the residue filter 21 in the above-mentioned “washing” step is the residue filter 21.
The water flows upward to the residue discharge opening 22 side with the water flowing toward the residue discharge opening 22, and is discharged to the outside of the machine along with the water flowing from the residue discharge opening 22 as described above. It

In the next "residual discharge" process, the water supply valve 2 is first
In this case, the water supply is performed by opening 6 and then the pump 8 is rotated in the direction in which the drain impeller 31 functions to perform drainage, which is repeated twice in this case. In each of the water supplies, if there is a residue remaining on the residue filter 21 due to the water flowing from the water inlet 25a of the water injector 25 onto the residue filter 21 as described above, it is placed on the residue discharge opening 22 side. Shed Then, by the subsequent suction and drainage by the drainage impeller 31, it is further discharged outside the machine along with the water flowing from the residue discharge opening 22 as described above.

The next "water supply" step is performed in the same manner as the above-mentioned "water supply" step, and the subsequent "rinsing" step is
The procedure is the same as the above-mentioned "washing" step except that the heater 29 does not generate heat and the water does not contain a detergent. Further, the subsequent "drainage" step is performed in the same manner as the "water supply" step described above, and the "residual discharge" step is also performed in the same manner as the "residual discharge" step.

Then, again, "water supply" similar to the "water supply" step, "rinsing" accompanied by heat generation of the heater 29 similar to the "washing" step, "drainage" similar to the "drainage" step, and "residual waste discharge". The same "drainage" process is executed, and finally the "drying" process is executed. In this “drying process”, the heater 29 is intermittently heated and the fan 43 is continuously rotated, whereby air is sucked into the cleaning tank 2 from the outside of the machine and heated by the heater 29. By doing so, warm air is made to come into contact with the tableware after washing, and the tableware is dried by discharging it with the moisture taken from the tableware to the outside of the machine.

As described above, in this structure, the residue filter 21 is provided at a position on the cleaning water channel 13 of the water storage tank 7 to capture the residue from the water sucked by the pump 8 (cleaning pump), and Drainage channel 14 of the water storage tank 7
An opening 22 for discharging the residue is provided at the upper position so that the pump 8
The water is sucked up by the (drainage pump) and the residue is passed through.

As a result, the dregs dropped from the dishes at the time of washing, the drainage opening 22 for drainage, the water storage tank 7,
It can be discharged out of the machine through the drainage channel 14,
Therefore, it becomes possible to perform rinsing with clean water that does not touch the residue without leaving the residue. Therefore, it is possible to prevent the fine residue of the residue from re-adhering to the tableware during rinsing, and to improve the finish of cleaning the tableware.

Further, in the case of this configuration, the residue filter 2
1 is gradually lowered toward the opening 22 for discharging the residue. As a result, the residue captured by the residue filter 21 easily flows into the residue discharging opening 22 according to the gradually descending structure of the residue filter 21, so that the efficiency of discharging the residue can be improved, and the dishwashing finish can be improved. Can be made even better.

Further, in this case, the descending angle θ of the residue filter 21 is set to about 15 degrees or more. This is based on the inventor's experiment. That is, the inventor conducted an experiment to sequentially change the descending angle θ of the residue filter 21 to check the outflow rate of the residue, and as shown in FIG. 11, the descending angle θ of the residue filter 21 should be about 15 degrees or more. As a result, the outflow rate of the residue of about 80% or more, which can be judged to be a sufficient outflow rate, was obtained. This is because by setting the descending angle θ of the residue filter 21 to about 15 degrees or more, the residue remaining on the residue filter 21 is more likely to flow toward the residue discharge opening 22 side, and thus the residue is removed. Since the discharge efficiency can be further improved, the finish of dishwashing can be further improved.

In addition, in the case of this structure, the residue filter 21 is subjected to the water repellent treatment 24, and the water repellent effect allows water to easily flow on the residue filter 21. Therefore, the debris captured by the debris filter 21 also easily flows on the debris filter 21 toward the debris discharge opening 22, and thus the efficiency of discharging the debris can be further improved.
This also makes it possible to further improve the finish of dishwashing.

Further, in this structure, water is poured from the side of the residue filter 21 opposite to the residue discharge opening 22 side to the residue discharge opening side 22. As a result, with the water flowing on the residue filter 21 toward the residue discharge opening 22 side, the residue on the residue filter 21 flows into the residue discharge opening 22, which also improves the efficiency of discharging the residue, and the tableware. The finish of cleaning can be further improved.

In addition, in this case, in order to inject water from the side of the residue filter 21 opposite to the residue discharge opening 22 side to the residue discharge opening side 22, it is injected into the residue discharge opening part of the residue filter 21. The water injector 25 is provided on the side opposite to the 22 side,
This water injector 25 is realized by a structure in which a connecting pipe 27 is connected to the water supply valve 26. Thereby, at each water supply, the water supplied through the water supply valve 26 flows from the water injector 25 onto the residue filter 21 toward the residue discharge opening 22 side,
In the "water supply" process before the "rinsing" process, etc., it is possible to improve the efficiency of discharging the residue, which also improves the finish of dishwashing.

Furthermore, in the case of this configuration, "residual discharge" is performed by water supply and drainage after the "drainage" step.
I also try to carry out the process. As a result, the residue on the residue filter 21 can be discharged not only in the “drainage” step but also in the subsequent “drainage discharging” step, which also improves the finish of dishwashing.

In contrast to the above, FIG. 12 and FIG. 13 show the second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only the part will be described.

In this case, the above-mentioned residue filter 21 is used.
In place of the above, a residue filter 51 which is larger than the above and has a size that covers the entire opening on the upper surface of the water storage tank 7 is used, and a small hole 51a is formed at a position on the cleaning water channel 13 like the above small hole 21a. And an opening 52 for discharging the residue is formed at a position on the drainage water channel 14. Further, the residue filter 51 has an inclined shape that gradually descends from four directions, front, rear, left and right, toward the residue discharge opening 52, and the descending angle θ
Is about 15 degrees or more.

Further, in this case, the structure for pouring water from the side of the residue filter 51 opposite to the residue discharge opening 22 side to the residue discharge opening side 22 is changed. More specifically, the water supply valve 26 is disposed in the outer lower portion of the cleaning tank 2 at the rear left-right intermediate position, and the water supply port 53 is formed upward at the bottom of the cleaning tank 2 above the water supply valve 26. It is covered with a cover 54 from above. Then, the opening 5 of the water inlet cover 54
A guide 55 extending in an arc shape from the 4a side to an upper rear portion of the residue filter 51 on the side opposite to the residue discharge opening 52 side is provided, for example, in the form of a standing wall integrated with the water supply port cover 54 on the bottom surface of the cleaning tank 2. It is provided above.

The bottom surface 2a of the cleaning tank 2 has a water supply port 53
The water is gradually lowered from the rear side where the water is provided to the portion where the water storage tank 7 where the residue filter 51 is provided is present. With this configuration, at each water supply, the water supplied through the water supply valve 26 is
The water is ejected from the water supply port 53 and is guided along the guide 55 to the side of the residue filter 51 opposite to the residue discharge opening 52 side.

When the pump 8 functions as a washing pump, a part of the water jetted and dropped from the fountain arm 6 is guided along the guide 55 and the residue filter 51 is discharged as described above.
To the side opposite the opening 52 for discharging the residue. Then, the guided water flows on the residue filter 51 toward the residue discharge opening 52 side.

In this way, the water in the cleaning tank 2 at the time of water supply or cleaning is guided by the guide 55 to the side of the residue filter 51 opposite to the residue discharge opening 52 side, and the residue filter 51 is left above the residue. Since it can flow to the discharge opening 52 side,
Similar to the above, it is possible to improve the efficiency of discharging the residue and thus the dishwashing finish.

The structure in which the residue filters 21 and 51 are gradually lowered is not limited to the above-described inclination, but may be stepwise. Further, the washing pump and the drainage pump do not have to serve as the single pump 8 and may be provided separately. Further, the water channel 13 for cleaning and the water channel 14 for drainage may not be collectively provided in the connecting pipe 9, but may be formed of separate hoses or pipes. In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and may be appropriately modified and implemented without departing from the scope of the invention.

[0057]

As described above, according to the dishwasher of the present invention, a residue filter is provided at a position on the cleaning water channel of the water storage tank to capture the residue from the water sucked by the cleaning pump, A residue discharge opening is provided at a position on the drainage channel of the water storage tank to allow the residue to pass along with the water sucked by the drainage pump. It can be discharged to the outside, leaving no residue, so that rinsing can be performed with clean water that does not touch the residue, and the dishwashing finish can be improved.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a main part taken along line AA of FIG. 2 showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of the cleaning tank portion.

[Fig. 3] Overall vertical side view

FIG. 4 is an exploded perspective view of a portion connecting a water storage tank and a pump.

FIG. 5 is a plan view of a connecting pipe for connecting a water storage tank and a pump.

FIG. 6 is a vertical cross-sectional view of a portion where a water storage tank and a pump are connected.

7 is an enlarged cross-sectional view of the connecting pipe taken along the line BB of FIG.

FIG. 8 is a vertical sectional view of the pump.

FIG. 9 is a rear view of the water level detection device portion (viewed from the direction of arrow C in FIG. 3).

[Fig. 10] Driving process chart

FIG. 11 is a diagram showing the relationship between the descending angle of the residue filter and the outflow rate of the residue.

FIG. 12 is a view corresponding to FIG. 2 showing a second embodiment of the present invention.

13 is an enlarged cross-sectional view of the main part taken along line D-D in FIG. 12 (equivalent to FIG. 1).

[Explanation of symbols]

2 is a cleaning tank, 7 is a water storage tank, 8 is a pump (cleaning pump, drainage pump), 13 is a cleaning water channel, 14 is a drainage water channel, 21 is a residue filter, θ is a descending angle of the residue filter, and 22 is an opening for discharging residue. Reference numeral 24 is a water repellent treatment, 25 is a water injector, 26 is a water supply valve, 27 is a connecting pipe, 51 is a residue filter, 52 is an opening for discharging residue, and 55 is a guide.

Continued front page    (72) Inventor Genichiro Kono             1-1, Shibaura, Minato-ku, Tokyo Toshiba Rye             Within Fu Engineering Co., Ltd. (72) Inventor Shuki Aoyama             1-1, Shibaura, Minato-ku, Tokyo Toshiba Rye             Within Fu Engineering Co., Ltd. (72) Inventor Mitsutoshi Fujimura             1-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Toshiba headquarters office F-term (reference) 3B082 BG01 BG04

Claims (8)

[Claims] 1. A cleaning tank, a water storage tank provided at a lower portion of the cleaning tank, a cleaning water channel having one end connected to the water storage tank, and the cleaning water channel connected to the other end of the cleaning water channel. A washing pump used for washing dishes in a tank, a drainage water channel whose one end is connected to the water storage tank, and drainage water which is connected to the other end of the drainage water channel and is used for draining water from the cleaning tank to the outside of the machine. With a pump, provided at a position on the cleaning water channel of the water storage tank, a residue filter for capturing a residue from water sucked by the cleaning pump, and a position on the drainage water channel of the water storage tank. A dishwasher, comprising: a residue discharge opening for allowing the residue to pass through together with the water sucked by the drainage pump. 2. The dishwasher according to claim 1, wherein the residue filter is gradually lowered toward the residue discharge opening. 3. The dishwasher according to claim 2, wherein the residue filter has a descending angle of about 15 degrees or more. 4. The dishwasher according to claim 1, wherein the residue filter is subjected to water repellent treatment. 5. The dishwasher according to claim 1, wherein water is poured from the side of the residue filter opposite to the residue discharge opening side to the residue discharge opening side. 6. The dishwasher according to claim 5, wherein a water injector is provided on the side of the residue filter opposite to the residue discharge opening side, and the water injector is connected to the water supply valve by a connecting pipe. Machine. 7. The dishwasher according to claim 5, wherein a guide is provided in the cleaning tank for guiding the water in the cleaning tank to a side opposite to the side of the residue filter for discharging the residue. . 8. The dishwasher according to claim 1, further comprising a residue discharging step performed by water supply and draining after the draining step.