JP3588579B2 - Dishwasher - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dishwasher for washing dishes. In particular, it relates to a technique suitable for discharging residual vegetables.
[0002]
[Prior art]
An example of a conventional dishwasher (eg, Japanese Patent Publication No. 2621539) will be described with reference to FIGS. FIG. 1 is a perspective view showing a dishwasher and a garbage disposal machine. FIG. 2 is a perspective view of the dishwasher when the front door is in an open state (the illustration of a dish basket and the like accommodated therein is omitted). FIG. 3 is a schematic vertical sectional view of the dishwasher.
A cleaning tank 122 is accommodated in the substantially box-shaped cleaning machine main body 112. The cleaning tank 122 has a box shape having an opening at the front (left side in FIG. 3). A front door 114 is provided to cover a front open portion of the cleaning tank 122. The front door 114 opens and closes between a “closed position” indicated by a solid line in FIG. 3 and an “open position” indicated by a two-dot chain line. In the washing tank 122, a tableware basket 116 for storing tableware 118 is provided. Washing water 126 is placed at the bottom of the washing tank 122, and when the dishwasher 110 is operating, the washing water 126 is sucked into the washing pump 132 through the suction passage 133, and the washing water 126 is added. Pressed. The pressurized cleaning water 126 passes through the discharge passage 135 and spouts vigorously from a plurality of nozzle holes 134a formed in the cleaning nozzle 134 to clean the tableware 118. The washing water 126 that has washed the tableware 118 returns to the bottom of the washing tank 122, passes through a mesh-like garbage filter 152, and is sucked into the washing pump 132 again through the suction passage 133. That is, the cleaning water 126 circulates through the cleaning pump 132 → the jet from the cleaning nozzle hole 134a → the cleaning of the tableware 118 → the garbage filter 152 → the cleaning pump 132. The tableware 118 is washed by the circulation of the washing water 126.
The user of the dishwasher 110 opens the front door 114 to put the tableware 118 in the tableware basket 116, closes the front door 114, and operates the dishwasher 110 to wash the tableware 118. After the washing operation of the dishwasher 110 is completed, the front door 114 is opened, and the tableware 118 is taken out of the tableware basket 116.
[0003]
If residual dishes (vegetable waste, fish bones, etc.) remain on the tableware 118 before washing, the user removes (shake off) the residual dishes from the tableware 118 on the chute 138. The removed garbage is dropped into the chute 138 and discarded by the garbage disposer 171 installed below the dishwasher 110. However, in this state, the garbage is not completely removed from the tableware 118, and some garbage remains on the tableware 118. The tableware 118 to which the residual vegetables adhere is stored in the tableware basket 116 as it is and washed. When the tableware 118 with the leftovers attached is washed, the leftovers are washed away by the washing water 126 and reach the bottom of the washing tank 122. The cleaning water 126 is circulated in the cleaning tank 122 and passes through the garbage filter 152, so that the garbage is collected by the garbage filter 152. When the washing operation of the dishwasher 110 is completed, the user puts his hand on the bottom of the washing tank 122 and removes the garbage filter 152 from the washing tank 122. The removed garbage filter 152 is washed to remove garbage, and then returned to the cleaning tank 122.
[0004]
[Problems to be solved by the invention]
In the conventional dishwasher 110, when the washing operation is completed, the user removes the garbage filter 152 from the washing tank 122, cleans the garbage filter 152 to remove the garbage, and then returns the garbage filter 152 to the washing tank 122 again. However, it is troublesome to remove the garnish filter 152 every time the washing operation is completed and to wash the garnish filter 152. On the other hand, if the cleaning of the garnish filter 152 is neglected, the garbage filter 152 is clogged, and the circulation of the cleaning water 126 is hindered, and the tableware 118 cannot be cleaned. Overflow. Also, if the garbage is left on the garbage filter 152, the garbage will rot and generate an odor.
[0005]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a dishwasher that does not require the user to remove the garbage collected in the garbage filter.
[0006]
[Means for Solving the Problems, Functions and Effects]
The dishwasher according to claim 1 comprises a dishwasher main body, a washing tank provided in the dishwasher main body, a washing means for washing dishes in the washing tank, and a dishwasher provided by the washing means. A garbage filter for collecting the washed garbage, a drain passage having one end communicating with the downstream of the garbage filter and the other end communicating with a drain pump, and the garbage filter being provided in the middle of the drain passage. A drainage switching valve for discharging the garbage collected in the garbage drain, and a garbage discharge passage for discharging the garbage to the outside of the dishwasher with one end communicating with the drainage switching valve and the other end opened to the outside of the dishwasher. A garbage wash-off passage for supplying water for rinsing garbage collected in the garbage filter to the garbage filter from outside the dishwasher, and a garbage wash-off valve for opening and closing the garbage wash-off passage. I have. Then, the garbage collected by the garbage filter is discharged to the outside of the dishwasher without passing through the drain pump, and the garbage washing-off valve is opened after the washing water is drained from the washing tank .
Therefore, according to the configuration of the present invention, there is no need for the user to remove (wash) the garbage collected in the garbage filter, and the user is free from the troublesome work of cleaning the garbage filter. Since the user does not wash the garbage filter, neglecting to wash the garbage filter causes clogging of the garbage filter, preventing the circulation of the washing water and making it impossible to wash dishes, or washing water from the washing tank. There is no overflow. In addition, there is no possibility that garbage is left on the garbage filter and is spoiled, and no odor is generated.
Even if the garbage discharge valve is opened and the garbage collected in the garbage filter is discharged, some garbage is left in the garbage filter. The above-mentioned dishwasher flush valve of the dishwasher opens after the washing water is drained from the washing tank. When the garbage washing-off valve is opened, water (washing water) supplied from the outside of the dishwasher flows through the garbage washing-off passage to the garbage filter. When water is passed through the garbage filter, the garbage remaining on the garbage filter is completely washed away by this water flow. Therefore, the garbage collected in the garbage filter can be better discharged out of the dishwasher.
[0007]
In the dishwasher according to the first aspect , the garnish filter preferably has an opening and an opening / closing filter for opening and closing the opening, and the opening / closing filter preferably has a triangular shape with a center projecting upward .
The garnish filter of the above dishwasher has an opening and an opening / closing filter for opening and closing the opening. The opening / closing filter has a triangular shape whose center protrudes upward. When the center of the opening / closing filter has a triangular shape protruding upward as described above, the garbage is easily discharged from the opening / closing filter by the action of gravity.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
The main features of the embodiment of the present invention described later will be described.
(Mode 1) A cleaning means according to claim 1 is a cleaning nozzle, a cleaning pump, a suction passage, a discharge passage, a tableware basket, or the like. The cleaning water pressurized by the cleaning pump blows out from the cleaning nozzle through the discharge passage, and cleans the tableware stored in the tableware basket. The washing water that has washed the dishes returns to the washing pump through the suction passage. The tableware is washed by the circulation of the washing water in this manner.
(Mode 2) The garbage detection means according to claim 4 is a differential pressure sensor. When garbage is collected in the garbage filter, the washing water passing through the garbage filter becomes difficult to flow, and a pressure difference (differential pressure) occurs upstream and downstream of the garbage filter. By measuring the pressure difference between the upstream and downstream of the garbage filter by the differential pressure sensor, it is possible to detect that the amount of garbage exceeds the allowable value.
[0011]
【Example】
(Embodiment 1) A dishwasher according to a first embodiment of the present invention will be described with reference to FIG. FIG. 4 is a schematic longitudinal sectional view of the dishwasher.
First, the configuration of the dishwasher 10 will be described. The dishwasher 10 includes a main body 12, a washing tank 22, a washing pump 32, a garbage filter 55, a garbage discharge valve 62, and the like.
A cleaning tank 22 is housed in the box-shaped cleaning machine body 12. The cleaning tank 22 has a box shape having an open portion in front of the main body 12 (left side in FIG. 4). A front door 14 is provided to cover a front open portion of the cleaning tank 22. The front door 14 is operated by a user to open and close between a “closed position” indicated by a solid line in FIG. 4 and an “open position” indicated by a dashed line. When the front door 14 is closed, the cleaning tank 22 is sealed by the front door 14. An electric control circuit (not shown) prevents the dishwasher 10 from operating unless the front door 14 is closed.
The tableware basket 16 is provided below the washing tank 22. The tableware basket 16 is manufactured from a linear member and has a function of holding various tablewares 18 stored in the tableware basket 16.
[0012]
During the washing operation of the dishwasher 10, washing water 26 is put in the bottom of the washing tank 22. The cleaning pump 32 driven by an electric motor communicates with the bottom of the cleaning tank 22 via a suction passage 33 and with a cleaning nozzle 34 via a discharge passage 35. The washing nozzle 34 is disposed below the tableware basket 16 and is freely rotatable about a shaft 39. The cleaning nozzle 34 has a plurality of nozzle holes 34a.
The garbage washing-off passage 41 is provided with a garbage washing-off valve 42. Further, one end of the garbage washing-off passage 42 communicates with a water supply port 22a formed in the washing tank 22, and water is supplied to the other end from outside the dishwasher 10 (in the present embodiment, garnish washing-off). The valve 42 also has a function as a water supply valve for supplying the cleaning water 26 to the cleaning tank 22).
[0013]
A garnish filter 55 is attached to the bottom of the washing tank 22. The garnish filter 55 is formed in a mesh shape. The central portion of the garbage filter 55 is open, and the garbage discharge valve 62 opens and closes this opening. The garbage discharge valve 62 is an electromagnetic valve having a built-in solenoid, and this solenoid operates the open / close filter 62a. The opening / closing filter 62a has a mesh shape similar to that of the garbage filter, and the “close position” (the position of 62b) for closing the opening of the garlic filter 55 by the operation of the solenoid of the garbage discharge valve 62. Move between the "open positions" (the position of 62c). As shown in FIG. 4, the opening / closing filter 62a has a triangular shape with the center protruding upward.
The bottom of the washing tank 22 and the outside of the dishwasher 10 are communicated by the drain passage 45, and a drain pump 46 driven by an electric motor is mounted in the drain passage 45. As shown in FIG. 4, since a part of the drain passage 45 is formed in an “inverted U-shape”, the cleaning water placed in the bottom of the cleaning tank 22 must be sucked out by the drain pump 46. 26 is not discharged.
A drainage switching valve 65 is attached in the middle of the drainage passage 45. The drainage switching valve 65 switches between drainage flowing to the drainage passage 45 side and garbage discharge passage 66 side. The garbage discharge passage 66 communicates with a garbage disposer 71.
The operations of the cleaning pump 32, the garbage rinse-off valve 42, the garbage discharge valve 62, the drainage switching valve 65, and the like are controlled by an electric control circuit (not shown).
[0014]
Next, the operation of the dishwasher 10 will be described.
The user opens the front door 14, puts the tableware 18 in the tableware basket 16 in the washing tank 22, closes the front door 14, and then operates the dishwasher 10. Residual vegetables adhere to the tableware 18. When the operation of the dishwasher 10 is started, the garnish flush valve 42 is opened, and the rinsing water 26 is supplied from the outside of the dishwasher 10 to the bottom of the washing tank 22 through the water supply port 22a through the garbage rinse flush passage 41. Is done. When the washing water 26 is put into the bottom of the washing tank 22, the garbage washing-off valve 42 closes, and the supply of the washing water 26 to the washing tank 22 ends. At this time, the open / close filter 62a of the garbage discharge valve 62 is located at the closed position (the position of 62b). The drain switching valve 65 is located at a position (position 65a) that closes the garbage discharge passage 66 side. Subsequently, the cleaning pump 32 starts operating, and the cleaning water 26 at the bottom of the cleaning tank 22 is sucked into the cleaning pump 32 through the suction passage 33 and pressurized. The pressurized cleaning water 26 is supplied to the cleaning nozzle 34 through the discharge passage 35, and gushes out of the plurality of nozzle holes 34a. Since the cleaning nozzle 34 is freely rotatable about the shaft 39, the cleaning nozzle 34 is rotated for the counter operation in which the cleaning water 26 is ejected from the nozzle hole 34a. The cleaning water 26 is sprayed from the nozzle holes 34a while rotating the cleaning nozzle 34, so that the cleaning water 26 is sprayed on the tableware 18 at various angles to wash the tableware 18, and the cleaning water 26 is placed on the bottom of the cleaning tank 22. Return.
[0015]
When the tableware 18 is washed with the washing water 26, the residual vegetables attached to the tableware 18 are washed away and mixed into the washing water 26. The cleaning water 26 mixed with the garbage returned to the bottom of the cleaning tank 22 passes through the garbage filter 55 and the open / close filter 62a, and is sucked into the cleaning pump 32 again. When the cleaning water 26 mixed with the garbage passes through the garbage filter 55 and the open / close filter 62a, the garbage is collected by the garbage filter 55 and the open / close filter 62a. The cleaning water 26 circulates through the cleaning pump 32 → the jet from the cleaning nozzle hole 34a → the cleaning of the tableware 18 → the garbage filter 55 / opening / closing filter 62a → the rinsing pump 32. To be collected.
[0016]
When the washing of the tableware 18 is completed, the garbage is collected in the garbage filter 55 and the opening / closing filter 62a. Next, the open / close filter 62a of the garbage discharge valve 62 is brought to the open position (position of 62c), and the drain switching valve 65 opens the garbage discharge passage 66 (position of 65b). When the drainage switching valve 65 opens the garbage discharge passage 66, the washing water 26 contained in the washing tank 22 is discharged from the garbage discharge passage 66 to the garbage disposal 71. With the flow of the washing water 26, the garbage collected in the garbage filter 55 and the opening / closing filter 62a is washed away, and is discharged to the garbage disposal machine 71 together with the rinsing water 26 through the garbage discharge passage 66. However, at this time, the garbage collected in the garbage filter 55 and the opening / closing filter 62a has not been completely washed away. Subsequently, the garbage rinse valve 42 is opened, and water (flush water) is poured into the cleaning tank 22. The rinse water flows through the garbage filter 55 and the opening / closing filter 62a, and the garbage remaining in the garbage filter 55 and the opening / closing filter 62a is completely washed away. It is discharged to 71. As shown in FIG. 4, the opening / closing filter 62a has a triangular shape with the center protruding upward so that residual vegetables are easily washed away. When the rinsing of the garbage is completed, the garbage rinsing valve 42 is closed, the supply of the rinsing water to the cleaning tank 22 is stopped, and the drainage switching valve 65 closes the garbage discharging passage 66 (position 65a), and the garbage discharging is performed. The open / close filter 62a of the valve 62 moves to the closed position (the position of 62b).
Thereafter, the tableware drying device (not shown) operates, and the tableware 18 is dried. After the drying of the tableware 18 is completed, the user opens the front door 14 and removes the washed / dried tableware 18 from the dishwasher 10.
[0017]
As described above, in the dishwasher 10 according to the present embodiment, the garbage is automatically discharged to the garbage disposer.
Therefore, the user is released from the troublesome work of cleaning the garbage filter. In addition, the neglected cleaning of the garbage filter does not make it impossible to wash dishes, wash water overflows from the washing tank, and makes the garbage unpleasant and unpleasant odor. In addition, since the garbage is processed by the garbage processing machine, it is sanitary.
[0018]
(Embodiment 2) A dishwasher according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a schematic vertical sectional view of the dishwasher. Note that members shown in FIG. 5 that perform the same functions as the members shown in FIG. 4 are denoted by the same reference numerals, and redundant description will be omitted.
In the dishwasher 10a according to the second embodiment shown in FIG. 5, a garbage discharge valve 75 that opens and closes a garbage filter 73 communicates with one end of a garbage discharge passage 76. The other end of the garbage discharge passage communicates with the garbage disposer 71. The garbage discharge valve 75 is an electromagnetic valve having a built-in solenoid, and the solenoid opens and closes the on-off valve 75a. The on-off valve 75a moves between a "closed position" (position 75b) for closing the opening of the garbage filter 73 and an "open position" (position 75c). The garbage discharge valve 75 and the garbage disposal machine 71 communicate with each other via a garbage discharge passage 76. The drainage switching valve 65 of the dishwasher 10 according to the first embodiment is not provided in the dishwasher 10a according to the second embodiment, and has a simpler configuration.
[0019]
Next, the operation of the dishwasher 10a will be described.
When the washing of the tableware 18 is completed, the washing water 26 is filled in the bottom of the washing tank 22 and the garbage filter 73 collects the garbage. Subsequently, the opening / closing valve 75a of the garbage discharge valve 75 is opened (to the position of 75c), and the washing water 26 stored in the washing tank 22 is discharged to the garbage disposal machine 71 through the garbage discharge passage 76. . With the flow of the washing water 26, the garbage collected in the garbage filter 73 is washed away and discharged to the garbage disposal machine 71 together with the washing water 26.
[0020]
(Embodiment 3) A dishwasher according to a third embodiment of the present invention will be described with reference to FIG. FIG. 6 is a schematic longitudinal sectional view of the dishwasher. 6 that perform the same functions as the members illustrated in FIG. 4 are denoted by the same reference numerals, and redundant description will be omitted.
In the dishwasher 10b according to the third embodiment shown in FIG. 6, cleaning near the upstream side of the garbage filter 81 (the upper side of the garnish filter 81 shown in FIG. 6, whereas the lower side is the downstream side). A garbage discharge valve 83 is attached to the tank 22. The garbage discharge valve 83 is an electromagnetic valve having a built-in solenoid, and the solenoid opens and closes the on-off valve 83a. The on-off valve 83a moves between a “closed position” (position 83b) for closing the opening of the cleaning tank 22 and an “open position” (position 83c). The garbage discharge valve 83 and the garbage disposal machine 71 communicate with each other via a garbage discharge passage 85.
A differential pressure sensor 86 is provided as means for detecting the amount of the garbage collected in the garbage filter 81. The upstream 88 of the garbage filter 81 and the differential pressure sensor 86 are connected by an upstream pressure pipe 87. The downstream 89 of the garbage filter 81 and the differential pressure sensor 86 communicate with each other via a downstream pressure pipe 91. The upstream pressure pipe 87 and the downstream pressure pipe 91 transmit the pressure of the upstream 88 and the pressure of the downstream 89 of the garbage filter 81 to the differential pressure sensor 86, respectively, so that the differential pressure sensor 86 detects the differential pressure between the upstream 88 and the downstream 89. Can be measured. When the garbage that exceeds the allowable value is collected in the garbage filter 81, the pressure difference between the upstream 88 and the downstream 89 of the garbage filter 81 causes the differential pressure sensor to detect the garbage collected in the garbage filter 81. It detects that the amount has exceeded the allowable value.
[0021]
Next, the operation of the dishwasher 10b will be described.
When the dishwasher 10b is operated and the tableware 18 is washed, the garbage attached to the tableware 18 is washed away, and the garbage is collected in the garbage filter 81. When the amount of garbage collected in the garbage filter 81 increases, the garbage filter 81 is blocked by the garbage (clogging occurs), the amount of the garbage exceeds an allowable value, and the upstream of the garbage filter 81. The differential pressure sensor 86 detects this from the pressure difference between 88 and the downstream 89.
When the washing operation of the dishwasher 10b is completed, washing water 26 is filled in the bottom of the washing tank 22. If the differential pressure sensor 86 detects during the washing before the washing operation of the dishwasher 10b that the residual filter has been collected in the residual filter 81 beyond an allowable value, the residual vegetable is detected. The on-off valve 83a of the discharge valve 83 opens (becomes the position of 83c). When the on-off valve 83a is opened, the washing water 26 contained in the washing tank 22 is discharged to the garbage disposal machine 71 through the garbage discharge passage 85. When the washing water 26 is discharged, a flow shown by an arrow 93 in FIG. In this flow, the garbage of the garbage filter 81 is washed away, and the garbage is discharged to the garbage disposal 71 together with the washing water 26.
[0022]
In the dishwasher 10b according to the present embodiment, the garbage that exceeds an allowable value is collected in the garbage filter 81 by the differential pressure between the upstream 88 and the downstream 89 of the garbage filter 81 detected by the differential pressure sensor 86. We can know that discharge was necessary. For this reason, the garbage is not discharged every time the washing operation of the dishwasher is completed, but is discharged when needed, so that the timing of garbage discharge can be optimized. By optimizing the timing of garbage discharge, the operation time of the dishwasher 10b can be reduced, which is convenient.
[0023]
As described above, the dishwasher according to the embodiment of the present invention has been described, but the present invention is not limited to the above-described embodiment, and the present invention has been subjected to various changes and improvements based on the knowledge of the parties concerned. It can be implemented in the form.
For example, a weight sensor may be attached to the garbage filter as the garbage filter detecting means of the garbage filter. If the weight of the garbage filter is measured by this weight sensor, it is possible to detect that the amount of garbage exceeds an allowable value due to the increase in weight.
Further, the garbage washing-off valve is not used for the function of supplying washing water to the washing tank, and a water supply valve may be provided separately.
Instead of supplying the rinse water to the cleaning tank, one end of the garbage rinse-off passage may be arranged near the garbage filter, and the rinsing water may be directly blown onto the garbage filter. According to this method, the garbage can be more efficiently washed out from the garbage filter.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a conventional dishwasher and garbage processing machine.
FIG. 2 is a perspective view of the dishwasher (front door opened).
FIG. 3 is a schematic vertical sectional view of the dishwasher. FIG. 4 is a schematic vertical sectional view of the dishwasher according to the first embodiment of the present invention. FIG. 5 is a dishwasher according to a second embodiment of the present invention. FIG. 6 is a schematic longitudinal sectional view of a dishwasher according to a third embodiment of the present invention.
10: Dishwasher 12: Washer body 14: Front door 16: Dish basket 18: Tableware 22: Wash tank, 22a: Water supply port 26: Wash water 32: Wash pump 33: Suction passage 34: Wash nozzle, 34a: Nozzle Hole 35: Discharge passage 39: Shaft 41: Vegetables rinse-off passage 42: Vegetables rinse-off valve 45: Drainage passage 46: Drainage pump 55: Vegetables filter 62: Vegetables discharge valve, 62a: Open / close filter 65: Drainage switching valve 66: Garbage discharge passage 71: Garbage disposer 73: Garbage filter 75: Garbage discharge valve, 75a: Open / close valve 76: Garbage discharge passage 81: Garbage filter 83: Garbage discharge valve, 83a: Open / close valve 85: garbage discharge passage 86: differential pressure sensor 87: upstream pressure piping 88: upstream of garlic filter 89: downstream 91 of garlic filter: downstream pressure piping

Claims (2)

Dishwasher body,
A washing tank provided in the dishwasher body,
Washing means for washing dishes in the washing tank;
A garbage filter that collects garbage washed away from tableware by this washing means,
A drain passage having one end communicating with the downstream of the garbage filter and the other end communicating with a drain pump,
A drainage switching valve that is provided in the middle of the drainage passage and discharges garbage collected in the garbage filter;
One end communicates with the drainage switching valve and the other end opens outside the dishwasher , and a garbage discharge passage for discharging garbage outside the dishwasher ,
A garbage washing-off passage for supplying water for rinsing garbage collected in the garbage filter to the garbage filter from outside the dishwasher,
It has a garbage wash-off valve that opens and closes this garbage wash-off passage ,
The garbage collected by the garbage filter is discharged to the outside of the dishwasher without passing through a drain pump ,
A dishwasher characterized in that the garbage washing-off valve opens after washing water is drained from the washing tank . The garnish filter has an opening and an opening and closing filter for opening and closing the opening,
The dishwasher according to claim 1, wherein the opening / closing filter has a triangular shape whose center protrudes upward.

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