JP2002209825A - dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwasher in which washing water is jetted from a washing nozzle toward dishware to wash the dish, and the amount of water used is stable and the washing ability is high. I do. A filter (17) is disposed above a drain port (8) at the bottom of a washing tank (1), and a water level detector (11) communicates with a drain pipe path (10). The filter 17 includes a disk-shaped first filter 18 provided horizontally in the center, a rectangular second filter 19 provided substantially horizontally around the first filter 18, and a circumferential portion of the first filter. The third filter 20 is provided vertically below and has a hole size of the first filter 18 and the second filter 1.
9, the third filter 20 increases in order. At the center of the first filter 17, a substantially cylindrical protrusion 21 protruding upward is provided, and at least one of a side wall or a top surface of the protrusion 21 has a hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes by injecting washing water from a washing nozzle toward the dishes.

[0002]

2. Description of the Related Art In recent years, a dishwasher for washing dishes stored in a dish basket with washing water injected from a nozzle rotating in a washing tank has become mainstream.

Conventionally, this type of dishwasher has been configured as shown in FIG. Hereinafter, the configuration will be described.

[0004] As shown in FIG. 4, a cleaning nozzle 2 for spraying cleaning water is rotatably provided in a cleaning tank 1.
A tableware basket 4 for storing the tableware 3 is arranged. Cleaning tank 1
The cleaning water inside is heated by a heater 5, sucked by a cleaning pump 6 from a drain port 8 disposed at the bottom of the cleaning tank 1 through a cleaning pipe path 7, and sent to the cleaning nozzle 2 by pressure. The tableware 3 stored in the tableware basket 4 is washed with the washing water that is vigorously jetted from the washing nozzle 2. After such a circulation of the washing water is repeated for a certain period of time, the washing water is drained from the drain port 8 by the drain pump 9 through the drain pipe route 10, and the water level detection communicating with the drain pipe route 10 is performed. Water is supplied from the water supply valve 12 until the unit 11 detects the water. By repeating this series of operations several times, tableware 3
Is configured to be washed and rinsed. Also, as shown in FIG.
The filter 13 includes a disk-shaped first filter 14 provided horizontally at the center, a second filter 15 provided substantially horizontally around the first filter, and a circumference of the first filter. And a third filter 16 provided vertically below the portion, and the size of each through-hole is
The first filter 14 is the largest, followed by the second filter 15 and the third filter 16. The lower end of the third filter 16 is in contact with the connection between the drain port 8 and the drain pipe path 10.

[0005]

In such a conventional dishwasher, the washing water passes through the first filter 14, then passes through the third filter 16, and flows into the washing pipe path 7. Or the second filter 15
And flows into the cleaning pipe route section 7. With this configuration, the solid matter larger than the through-hole of the second filter 15 is collected, and the reattachment of the solid matter to the tableware 3 is suppressed. As the circulation of the washing water proceeds, the third filter 16 is clogged by relatively small solids contained in the washing water. Further, when the circulation operation of the washing water is completed and the drainage operation is started, the water sucked into the drainage pump 9 mainly passes through the first filter 14 and is smaller than the size of the through hole of the first filter 14. Most of the things are exhausted. When the washing water contains a large amount of solids, as the drainage operation proceeds, relatively large solids floating in the washing water are collected by the first filter 14, and the first filter 14 is clogged. Fall into Next, when the water supply is started after the drainage operation, the supply of water to the water level detection unit 11 is delayed because the first filter 14 and the third filter 16 are clogged, and the cleaning tank 1 is stopped.
There is a possibility that the amount of water supplied to the inside will increase, and the amount of water used will increase. Further, when the water supply process proceeds and water infiltrates into the drainage pipe route 10, the first filter 14 and the third filter 16 are clogged. Is in a state like a lid, the air in the drainage pipe route section 10 loses an escape route, and pushes up the filter 13. At this time, a gap is formed between the filter 13 and the drain port 8, and the solid matter collected by the first filter 14, the second filter 15, and the third filter 16 flows into the cleaning pipe path 7. As a result, the cleaning performance is reduced.

The present invention solves the above-mentioned problems, and the first
Provide a protrusion protruding upward at the approximate center of the filter of
By providing a hole in at least one of the side wall and the top surface of the projection, even if the first filter and the third filter are clogged, a water inflow path to the water level detection unit at the time of water supply is provided. It is an object of the present invention to provide a dishwasher that can secure an escape route for air in a drainage pipe route section, can use a stable amount of water, and has a high washing ability.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a first filter in which a filter is provided substantially horizontally at a substantially center.
, A second filter provided substantially horizontally around the first filter, and a third filter provided substantially vertically below a boundary between the first filter and the second filter. The size of the through hole of each filter is the largest in the first filter, then in the order of the second filter and the third filter, and the lower end of the third filter has a drain port and a drainage pipe route. The first filter is provided with a protrusion protruding upward, and at least one of the side wall and the top surface of the protrusion is a front / back surface of the first filter. It is provided with a hole that communicates between them.

[0008] This makes it possible to provide a dishwasher in which the amount of water used is stable and the washing capacity is high.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a cleaning tank provided with a cleaning nozzle, a drain port disposed at the bottom of the cleaning tank, and a drain port disposed above the drain port are provided. A filter, a washing pump for pressure-feeding the washing water to the washing nozzle, a washing pipe route connecting the washing pump to the drain port, and a drain pump for discharging the washing water out of the washing tank. A drain pipe connecting the drain port and the drain port, wherein the filter is provided with a first filter provided substantially horizontally at a substantially center and a second filter provided substantially horizontally around the first filter. 2 filter, and a third filter provided substantially vertically below the boundary between the first filter and the second filter, and the size of the through hole of each filter is the first filter. Filter is largest, next In the order of the second filter and the third filter, the lower end of the third filter is configured to come into contact with a connection portion between the drain port and the drain pipe route, and the first filter The filter is provided with a protrusion protruding upward, and at least one of the side wall and the top surface of the protrusion is provided with a hole communicating between the front and back surfaces of the first filter. Even when the filter and the third filter are clogged, it is possible to secure a water inflow path to the water level detection unit at the time of water supply, to prevent a shift in detection timing of the water level detection unit, and to drain the water at the time of water supply. An air escape route in the piping route is secured to prevent the filter from floating, and the solids collected by the first filter, the second filter, and the third filter are prevented from flowing into the washing piping route. It is possible to, can be used water to provide a high dishwasher with washing ability is stable.

According to a second aspect of the present invention, in the first aspect of the present invention, the upper end of the hole is located at a position higher than the water level during the cleaning operation. Since the solid matter can be reliably prevented from clogging in the holes throughout the washing operation, a dishwasher with more stable and high washing ability can be provided.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the filter has a handle protruding upward, and the handle and the projection are integrally formed. It is possible to provide a dishwasher having a simpler shape, a low price and a high washing ability.

(Embodiment 1) As shown in FIG.
A drain port 8 is provided at the bottom of the filter, and a filter 17 is disposed above the drain port section 8. The water level detecting section 11 communicates with the drain pipe path section 10. As shown in FIG. 2, the filter 17 includes a disk-shaped first filter 18 provided horizontally at the center, a second filter 19 provided substantially horizontally around the first filter 18, and a first filter 18. And a third filter 20 provided vertically below the circumferential portion of the filter. The first filter 18 has the largest through-hole size, and the second filter 1 has the largest size.
9. The order of the third filter 20. The lower end of the third filter 20 is in contact with the connection between the drain port 8 and the drain pipe route 10. At the center of the first filter 17, a substantially cylindrical protrusion 21 protruding upward is provided.
A vertically long square hole 22 is provided radially on one side wall, and a round hole 23 is provided on the top surface.

The operation of the above construction will be described. The solid matter adhering to the tableware 3 is dropped as the washing operation proceeds, and is mixed into the washing water. The washing water containing solid matter is supplied to the second filter 19 or the third filter 20.
Of the second filter 19, the solid matter larger than the through-hole of the second filter 19 is collected, and the reattachment of the solid matter to the tableware 3 is suppressed. As the circulation of the cleaning water proceeds, the third filter 20 is clogged by relatively small solids contained in the cleaning water. Further, when the circulation operation of the washing water is completed and the drainage operation is started, the water sucked into the drainage pump 9 mainly passes through the first filter 18 and is smaller than the size of the through hole of the first filter 18. Most of the things are exhausted. When the washing water contains a large amount of solids, as the drainage operation proceeds, relatively large solids floating in the washing water are collected by the first filter 18, and the first filter 18 is clogged. Fall into At this time, since the protrusion 21 protrudes above the surrounding first filter 18, the square hole 22 and the round hole 23 are not clogged. Next, when the water supply operation is started, the square hole 2
Water penetrates into the cleaning pipe path 7 and the drain pipe path 10 from the openings of the round holes 23 and the round holes 23. Therefore, since water can be reliably supplied to the water level detection unit 11, detection is not delayed, and the amount of used water does not increase.
Further, as the water supply process proceeds, the water level in the drainage pipe route 10 rises, and the air in the drainage pipe route 10 moves in the direction of the drainage port 8. Since the escape route is secured, the filter 17 does not rise. For this reason, it is possible to prevent the solids collected by the first filter 18, the second filter 19, and the third filter 20 from flowing into the cleaning pipe path portion 7 by the cleaning operation and the drainage operation.
It is possible to prevent a decrease in cleaning ability. This allows
It is possible to provide a dishwasher in which the amount of water used is stable and the washing capacity is high.

In this embodiment, the water level detecting section 11 has been described as being in communication with the drainage pipe path section 10. However, if the water level detecting section 11 is in direct communication with the washing tank 1, the water level detecting section 11 has the opposite effect. Can be prevented from being advanced, and a decrease in the amount of used water can be prevented, so that the same effect can be obtained.

(Embodiment 2) As shown in FIG. 3, a filter 24 has a disk-shaped first filter 25 provided horizontally at the center and a rectangular first filter 25 provided substantially horizontally around the first filter 25. 2 and a third filter 27 provided vertically below the circumference of the first filter. The first filter 25 has the largest size of each through hole. , And then the second filter 26 and the third filter 27. The lower end of the third filter 27 is in contact with the connection between the drain port 8 and the drain pipe route 10. The first filter 25 is provided with a substantially prismatic protrusion 28 projecting upward, a vertically long square hole 29 is provided on a side surface of the protrusion 28, and a hole 30 is provided on the top surface. The upper portion of the square hole 29 is set at a position higher than the water level during the cleaning operation.

The operation of the above construction will be described. Since the upper portion of the square hole 29 and the hole 30 are located at a position higher than the washing water level during the washing operation, there is no opportunity for the solid matter mixed in the washing water to pass therethrough. Clogging can be reliably prevented. In addition, since the projection 28 has a substantially prismatic shape, it can also serve as a handle, and there is no need to provide a separate handle, so that a simple and inexpensive filter can be obtained. This makes it possible to provide a dishwasher with a simpler shape, lower cost and higher washing ability.

[0017]

As described above, according to the first aspect of the present invention, the cleaning tank provided with the cleaning nozzle, the drain port disposed at the bottom of the cleaning tank, and the drain port A filter disposed above, a cleaning pump for pumping the cleaning water to the cleaning nozzle, a cleaning pipe path connecting the cleaning pump to the drain port, and a drain for discharging the cleaning water out of the cleaning tank. A pump, and a drainage pipe route that connects the drainage pump to the drainage port. The filter is provided with a first filter provided substantially horizontally at a substantially center, and a substantially horizontal filter around the first filter. And a third filter provided substantially vertically below the boundary between the first filter and the second filter. The size of the through hole of each filter is as follows: , The first filter is more Large, then the second filter,
In the order of the third filter, the lower end of the third filter is configured to be in contact with the connection portion between the drain port and the drain pipe route, and protrudes upward from the first filter. A protrusion is provided, and a hole is provided in at least one of the side wall and the top surface of the protrusion to communicate between the front and back surfaces of the first filter. To prevent the timing of the detection of the water level detection unit from shifting, and to secure the air escape route in the drainage pipe route at the time of water supply to prevent the filter from being lifted up. Since it is possible to prevent the solid matter collected by the filter and the third filter from flowing into the washing pipe route,
It is possible to provide a dishwasher in which the amount of water used is stable and the washing capacity is high.

In the invention according to the second aspect of the present invention, the upper end of the hole is configured to be at a position higher than the water level during the cleaning operation. That is, it is possible to surely prevent such a situation, so that it is possible to provide a dishwasher having a more stable and high cleaning ability.

According to the invention of claim 3 of the present invention, the filter has a handle protruding upward, and the handle and the projection are integrally formed. A high dishwasher can be provided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a dishwasher according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the dishwasher according to one embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a main part of a dishwasher according to a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a conventional dishwasher.

FIG. 5 is a longitudinal sectional view of a main part of a conventional dishwasher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing tank 7 Washing pipe route part 8 Drainage port 10 Drainage piping route part 11 Water level detection part 17 Filter 18 First filter 19 Second filter 20 Third filter 21 Projection part 22 Square hole 23 Round hole

 ──────────────────────────────────────────────────の Continuing on the front page (72) Yoshikazu Hariji, Inventor 1006 Kadoma, Kazuma, Osaka Prefecture, Matsushita Electric Industrial Co., Ltd. (72) Inventor Hiroyuki Nakano 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F-term (reference) 3B082 BG01 BG04

Claims (3)

[Claims] 1. A cleaning tank provided with a cleaning nozzle, a drain port disposed at the bottom of the cleaning tank, a filter disposed above the drain port, and a cleaning pump for pumping cleaning water to the cleaning nozzle. A washing pipe route for connecting the washing pump with the drain port, a drain pump for discharging washing water out of the washing tank, and a drain piping route for connecting the drain pump and the drain port. A first filter provided substantially horizontally at substantially the center, a second filter provided substantially horizontally around the first filter, a first filter and a second filter. A third filter provided substantially vertically below a boundary with the filter, wherein the size of the through hole of each filter is such that the first filter has the largest size, the second filter has
In the order of the third filter, the lower end of the third filter is configured to be in contact with the connection portion between the drain port and the drain pipe route, and protrudes upward from the first filter. A dishwasher provided with a projection, and provided with a hole in at least one of a side wall and a top surface of the projection to communicate between the front and back surfaces of the first filter. 2. The dishwasher according to claim 1, wherein the upper end of the hole is located at a position higher than the water level during the washing operation. 3. The dishwasher according to claim 1, wherein the filter has a handle protruding upward, and the handle and the projection are integrally formed.