JP7113307B2 - dishwasher - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing objects such as tableware stored in a washing tank.

A conventional dishwasher is shown in FIG. 8 (see, for example, Patent Document 1). FIG. 8 is a longitudinal sectional view of a conventional dishwasher. A washing tank 101 for containing tableware is provided in the main body. A cleaning pump 102 is provided at the bottom of the cleaning tank 101 to suck water from the bottom and spray the water into the cleaning tank 101 . A drain pump 103 sucks water from the bottom of the cleaning tank 101 and drains it out of the machine through a drain channel. The residue filter 107 is composed of the residue basket 104 , the metal plate 105 and the metal mesh portion 106 . The debris basket 104 collects large food debris during wash drain. The metal plate 105 has ramps and drainage holes that allow debris to flow into the debris basket 104 . Metal mesh portion 106 prevents debris from entering cleaning pump 102 . A water injection pipe 108 serving as a water injection means is provided around the outer periphery of the metal mesh portion 106 and removes residue adhering to the metal mesh portion 106 by injecting water from the outside to the inside.

When the operation of the dishwasher is started, water is supplied and the bottom of the washing tank 101 is filled with water. The accumulated water is sprayed into the washing tank 101 by the washing pump 102 to wash the tableware. After the washing is finished, the drain pump 103 operates to drain the water in the washing tank 101 out of the machine through the drain. When the operation of the drainage pump 103 is stopped, water is jetted from the outside of the metal mesh portion 106 from the water injection pipe 108 located around the outer periphery of the metal mesh portion 106 of the residue filter 107 to remove the residue adhered to the inside. When the water supply ends, the drain pump 103 is actuated again, and the accumulated water is sucked from the bottom of the washing tank 101 by the drain pump 103 and discharged out of the machine through the drain channel.

According to the above configuration, fine food residue adhering to residue filter 107 is washed away inside metal mesh portion 106 . For this reason, after the washing is completed, the residual food odor does not remain in the dishwasher, and the odor does not transfer to the dishes.

JP-A-04-224725

Conventional dishwashers jet water from the outside of the metal mesh portion to remove adhering debris. However, in order to inject water onto the entire metal mesh portion from the outside, it is necessary to provide a considerable number of injection ports around the metal mesh portion or to configure the injection ports to move around. This poses a problem of complicating the configuration of the water injection means.

After the washing of the tableware is finished and the drain pump is stopped, water is again sprayed onto the metal mesh portion and then the water is drained. This method has the problem that the operation time of the dishwasher is long.

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional problems, and cleans by pouring water into the inside of the metal mesh portion from a water inlet having a simple structure at the time of water supply in the washing process and the rinsing process. Thus, it is an object of the present invention to provide a dishwasher which has a simple structure, cleans the metal mesh part without taking extra time, and suppresses the residue remaining on the residue filter.

In order to achieve the above object, the dishwasher of the present invention
a housing, a washing tank provided in the housing for accommodating an object to be washed, a water supply section for supplying washing water into the washing tank, and a water reservoir section recessed further into the bottom of the washing tank; A residue filter which is formed in a cylindrical shape and is detachably fixed to the water reservoir, a washing nozzle for spraying washing water onto the objects to be washed contained in the washing tank, and the water reservoir and the washing nozzle. a circulating water channel communicating with each other; a circulating water channel port of the circulating water channel provided in the water reservoir; a washing pump provided in the circulating water channel for sending washing water in the water reservoir to the washing nozzle; a drainage channel that communicates with the outside of the body; a drain port of the drainage channel provided near the bottom of the water reservoir; a water supply channel that communicates the water reservoir with the water supply; and a controller for executing a washing operation including a washing process and a rinsing process. Further, the circulating channel port and the drain port are provided at positions substantially facing each other when viewed from above, and the residue filter is moved from the cleaning tank through the circulating channel port through the residue filter by the operation of the cleaning pump. The inner surface captures debris contained in the wash water flowing into the housing, and part of the captured debris when the wash water is discharged outside the housing through the drain port and the drain channel. is discharged together with the wash water, the water inlet is arranged in the vicinity of the bottom of the water reservoir below the lower end of the residue filter, and the water supply unit supplies the supplied wash water to the water supply Via the channel and the water inlet, the water is allowed to flow from below the residue filter toward the inner region of the residue filter.

With this configuration, even if the residue captured by the residue filter remains on the inner surface of the residue filter during the washing process, the cleaning water supplied during the subsequent rinsing process does not remain in the inner area of the filter. wash away any debris left behind when flowing into the As a result, it is possible to wash the residue filter without spending extra time during the cleaning operation with a simple configuration, and to suppress the residue remaining on the residue filter.

The dishwasher of the present invention has a simple structure and can wash the residue filter without spending extra time during the washing operation, and can suppress the residue remaining on the residue filter.

Schematic side cross-sectional view of a dishwasher according to Embodiment 1 of the present invention A plan view of the bottom of the washing tub of the dishwasher according to Embodiment 1 of the present invention. AA sectional view of FIG. FIG. 3 is a plan view of a state in which the residual filter is removed from the state in FIG. 2; BB sectional view of FIG. FIG. 2 is a side view of the vicinity of the bottom of the washing tub of the dishwasher according to Embodiment 1 of the present invention; CC sectional view of FIG. FIG. 2 is an exploded perspective view of the residue filter of the dishwasher according to Embodiment 1 of the present invention separated from the water reservoir. Explanatory drawing showing the flow of washing water in the circulation operation of the dishwasher according to Embodiment 1 of the present invention. Explanatory drawing showing the flow of wash water in the drain operation of the dishwasher according to Embodiment 1 of the present invention. Explanatory drawing showing the flow of wash water in the water supply operation of the dishwasher according to Embodiment 1 of the present invention. A perspective view of a dishwasher according to another embodiment of the present invention Side sectional view of a conventional dishwasher

The dishwasher of the first invention is
A housing, a washing tank provided in the housing for accommodating an object to be washed, a water supply section for supplying washing water into the washing tank, and a water reservoir provided at the bottom of the washing tank are formed in a cylindrical shape. a residue filter detachably fixed to the water reservoir; a washing nozzle for spraying washing water onto the object to be washed contained in the washing tank; and a circulating water passage communicating the water reservoir and the washing nozzle. a washing pump provided in the circulating water channel for sending washing water in the water reservoir to the washing nozzle; a drainage channel communicating the water reservoir with the outside of the housing; and a washing operation including a washing step and a rinsing step. and a control unit for executing. Further, the residue filter captures the residue contained in the wash water flowing into the water reservoir due to the operation of the wash pump on its inner surface, and also captures the residue when the wash water is discharged outside the housing. The residue is discharged together with the cleaning water, and the water supply unit includes a water supply channel for allowing the supplied cleaning water to flow into the inner region of the residue filter.

With this configuration, even if the residue captured by the residue filter remains on the inner surface of the residue filter during the washing process, the cleaning water supplied during the subsequent rinsing process does not remain in the inner area of the filter. wash away any debris left behind when flowing into the As a result, it is possible to wash the residue filter without spending extra time during the cleaning operation with a simple configuration, and to suppress the residue remaining on the residue filter.

In the second invention, particularly in the first invention,
A drainage pump provided in the drainage path for discharging the cleaning water in the cleaning tank to the outside of the housing, and a drainage pump provided upstream of the residue filter and having a size large enough to cause problems when the cleaning water is drained. and a pre-filter that captures the debris of the. With this configuration, the pre-filter catches large debris, so that large debris does not flow into the drainage channel, and the occurrence of problems such as clogging of the drainage channel and the drainage pump can be suppressed. .

In the third invention, particularly in the first or second invention,
The water supply path includes a water inlet that serves as an outlet to the water reservoir, the drainage path includes a water outlet that serves as an inlet from the water reservoir, and the water inlet and the water outlet are connected to the residue filter. It is provided below near the bottom of the water reservoir. With this configuration, in the water supply operation, the water flow in the direction opposite to the water discharge operation is applied to the scum filter, so that the residue that was not removed in the water discharge operation can be peeled off. In addition, the water flow of the water supply can be applied to or along the bottom of the water reservoir, where dirt tends to accumulate, so that the accumulation of dirt on the bottom of the water reservoir can be suppressed.

A fourth invention is, particularly, in any one of the first to third inventions,
The water injection port and the water discharge port are separated in the circumferential direction and provided so as not to face each other, and have a guide portion that guides the wash water flowing in from the water injection port toward the inner surface of the residue filter. . With this configuration, the supplied washing water is led to effectively hit the inner peripheral surface of the residue filter, and the cleaning effect of the inner peripheral surface of the residue filter by the cleaning water can be improved.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a schematic cross-sectional side view of a dishwasher according to Embodiment 1 of the present invention. FIG. 1 shows a state in which the dishwasher is built into the system kitchen SK. In the description of each embodiment, as shown in the drawings, the forward direction is the direction in which the door 5 and the cleaning tank 2 are pulled out, and the rearward direction is the direction in which the cleaning tank 2 is accommodated and the door 5 is closed. explain. Further, the installation side of the dishwasher is defined as the lower side, the opposite side is defined as the upper side, and the right side of the front of the door 5 is defined as the right side, and the left side as the left side.

As shown in FIG. 1, the dishwasher of this embodiment includes a housing 1, a washing tank 2, a washing device 3, a water supply section 4, a door 5, a drainage section 7, and the like. In the following embodiments, as shown in the drawings, the forward direction is the direction in which the door 5 and the cleaning tank 2 are pulled out, and the rearward direction is the direction in which the cleaning tank 2 is pulled out.
is stored and the door 5 is closed. In addition, the installation side of the dishwasher is defined as the lower side, the opposite side is defined as the upper side, and the right side of the front of the door 5 is defined as the right side, and the left side as the left side.

The housing 1 has a front opening 1a on its front surface. The washing tank 2 includes therein a dish basket 6, a washing nozzle 3c, a water reservoir 8, a residue filter 9, and the like. The cleaning tank 2 is provided inside the housing 1 so that it can be taken in and out in the front-rear direction. The cleaning tank 2 has an upper opening 2a on its upper surface. The upper opening 2 a is closed by an inner lid 10 arranged inside the housing 1 when the cleaning tank 2 is housed inside the housing 1 . The inner lid 10 moves up and down by a link mechanism 11 interlocking with the loading and unloading of the cleaning tank 2 . A seal portion 12 formed of a deformable hollow rubber tube is provided on the periphery of the upper opening 2a. The seal portion 12 is compressed by the inner lid 10 that descends when the cleaning tank 2 is accommodated in the housing 1, and the top opening portion 2a is sealed.

Objects to be washed 13 such as dishes are placed in the dish basket 6 . A door 5 is provided at the front of the cleaning tank 2 and covers the front of the housing 1 during storage. The water supply unit 4 includes a water supply path 4a, a water supply valve 4b, and the like. The water supply channel 4a is connected to a water pipe (not shown). The water supply valve 4 b is provided in the water supply path 4 a at the rear inside the housing 1 . When the water supply valve 4b is opened, it supplies tap water to the washing tank 2 as washing water.

The cleaning device 3 includes a circulating water channel 3a, a cleaning pump 3b, a cleaning nozzle 3c, and the like, and cleans the object 13 to be cleaned. The circulation water channel 3a communicates the water reservoir 8 and the washing nozzle 3c. The cleaning pump 3b is provided in the circulating water channel 3a and fixed outside the cleaning tank bottom 2b. The washing pump 3b has a suction side connected to the water reservoir 8 and circulates the washing water from which the residue has been removed by the residue filter 9. - 特許庁

The cleaning nozzle 3c is provided on the cleaning tank bottom 2b. The washing pump 3b pumps washing water to the washing nozzle 3c. The washing nozzle 3c sprays washing water toward the object 13 to be washed while rotating due to the reaction force of the pressure-fed washing water. That is, the cleaning pump 3b pressurizes the cleaning water stored in the cleaning tank 2 and supplies it to the cleaning nozzle 3c. The washing water jetted from the washing nozzle 3c collides with the object to be washed 13 to clean the object 13 and wash it. The washing water includes a washing liquid that contains detergent and is sprayed onto the object 13 to be washed, and rinsing water for rinsing the object 13 to be washed.

The water reservoir 8 is provided in the cleaning tank bottom 2b in the cleaning tank 2. As shown in FIG. The residue filter 9 is detachably provided in the water reservoir 8 and captures residue washed and removed from the object 13 to be cleaned. The water reservoir 8 and the residue filter 9 will be described later in detail. The heater 14 heats the washing water stored in the washing tank 2 in the washing process or the rinsing process. The heater 14 heats the drying air in the cleaning tank 2 in the drying process. A temperature sensor 15 is arranged outside the cleaning tank bottom 2 b and detects the temperature of the cleaning tank 2 . A detergent supply device 16 for supplying detergent into the cleaning tank 2 is provided on a side surface of the cleaning tank 2 facing the door 5 .

The drain part 7 drains the washing water flowing into the water reservoir part 8 to the outside of the housing 1 . The drain section 7 includes a drain channel 7a, a drain pump 7b, a drain port 7c, and the like. The drain pump 7b may be configured to be used as a drain pump by reversing the rotation direction of the motor during circulation of the washing pump 3b. Alternatively, a drain valve may be provided in place of the drain pump 7b, and when the drain valve is opened, the cleansing water may be drained by natural fall due to gravity.

A control unit 17 that controls the cleaning operation is provided inside the door 5 . The control unit 17 sequentially controls a washing process for washing the object 13 to be washed, a rinsing process for washing away detergent and residue adhering to the object 13 to be washed, and a drying process for drying the object 13 after rinsing, Execute the cleaning operation.

Next, the structure of the water reservoir 8 provided in the washing tank bottom 2b, and the water supply part 4, the residue filter 9 and the drainage part 7 provided in the water reservoir 8 will be described in detail.

FIG. 2 is a plan view of the washing tank bottom 2b of the dishwasher according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view taken along line AA of FIG. FIG. 4 is a plan view of the state shown in FIG. 2 with the residual filter 9 removed. 5 is a cross-sectional view taken along the line BB of FIG. 4. FIG. FIG. 6 is a side view of the lower portion of the cleaning tank 2. FIG. 7 is a cross-sectional view taken along line CC of FIG. 6. FIG. FIG. 8 is an exploded perspective view of the residue filter 9 separated from the water reservoir 8. FIG.

In the washing tank bottom 2b, water reservoirs 8 are recessed in two stages to store the supplied washing water in the washing process and the rinsing process. As shown in FIG. 4 , the first water reservoir 8 a on the first stage is shallowly provided in a substantially rectangular shape toward the front in the center of the right and left of the cleaning tank 2 . Then, as shown in FIGS. 3 and 5, it is formed with a downward slope toward its center. The second water reservoir 8b on the second stage is provided in the center of the first water reservoir 8a. The second water reservoir 8b is formed in a substantially cylindrical shape.

As shown in FIGS. 3 and 5, on the side surface of the second water reservoir 8b, there are a circulating water channel port 3d serving as the inlet of the circulating water channel 3a, a water inlet 4c serving as the outlet of the water supply channel 4a, and an inlet of the drainage channel 7a. A drain port 7c is provided. The circulating water channel port 3d is provided as an aggregate of many square holes (for example, 2 mm square) over about a half circumference in the vicinity of the middle in the vertical direction of the second water reservoir 8b. The water inlet 4c and the water outlet 7c are provided circumferentially apart from each other on the side surface of the second water reservoir 8b in the vicinity of the water reservoir bottom 8c. However, as shown in FIGS. 5 and 7, the water inlet 4c and the water outlet 7c are arranged so as not to face each other.

As shown in FIG. 8 , a residue filter 9 is detachably provided in the water reservoir 8 . The residual filter 9 is composed of three types of filters, a first filter 9a, a second filter 9b, and a third filter 9c, which can be separated. Specifically, the third filter 9c is provided in the center of the first filter 9a, and the second filter 9b is provided inside the upstream of the third filter 9c.

The first filter 9a is made of stainless punching metal, and is provided to cover the first water reservoir 8a on the extension line of the cleaning tank bottom 2b. The first filter 9a has punching holes (for example, φ1 mm×pitch 2 mm) through which debris is passed so as not to clog the circulating water channel 3a and the cleaning pump 3b. An opening 18 for inserting the third filter 9c is formed in the center.

The second filter 9b is made of resin (for example, polypropylene (PP)) and formed into a cylindrical shape with a bottom. The residue passing through the second filter 9b is discharged out of the housing 1 together with the washing water at the time of draining, as will be described later. For this reason, a face grid is formed through which debris having a size (for example, exceeding 5×5×20 mm) that would lock the drain pump 7b or clog the drain channel 7a would not pass. In the unlikely event that a large amount of residue has passed through the second filter 9b, the drain port 7c is provided with a filter sized to lock the drain pump 7b or clog the drain channel 7a. Protrusions 7d are formed such that debris (eg, greater than 5×5×20 mm) cannot pass through. Clogging of the drainage section 7 is suppressed by the protrusion 7d. The second filter is useful as a pre-filter, especially when a drain pump 7b is provided.

The third filter 9c is formed by attaching a mesh member 9d having fine openings such as a wire mesh plain weave mesh (for example, 50 to 100 mesh or square hole mesh of about 0.28 mm) to the peripheral side of the cylindrical lattice. be. Debris that passes through the second filter 9b is captured by the third filter 9c, except for fine debris. Then, the debris captured by the third filter 9c is discharged out of the housing 1 together with the wash water during drainage.

The first filter 9a is fixed by inserting the third filter 9c into the central opening and fixing it. The third filter 9c is fixed by being screwed into a rotary engaging portion (not shown) formed near the bottom portion 8c of the water reservoir. The second filter 9b is inserted into the third filter 9c in a predetermined direction and pushed to the end, thereby being fixed by two pairs of engaging portions 19 formed opposite to each other at the upper portion.

The dishwasher of the present embodiment is configured as described above.

Next, the use and operation of the dishwasher having the above configuration will be described. First, the user grips the handle 5a of the door 5 and pulls out the washing tub 2 from the housing 1 of the dishwasher. At this time, the inner lid 10 is lifted by the link mechanism 11 in conjunction with the operation of pulling out the cleaning tank 2, and is separated from the top opening 2a. Next, the user sets objects to be washed 13 such as dishes in the dish basket 6 through the top opening 2 a of the washing tank 2 . Then, a predetermined amount of detergent is put into the detergent supply device 16 inside the washing tank 2 . Next, the user pushes the washing tank 2 into the housing 1 and closes the door 5 . At this time, the inner lid 10 is lowered by the link mechanism 11 in conjunction with the push-in operation of the cleaning tank 2, compressing the seal portion 12, and sealing the top opening 2a.

The user sets the operation course with an operation unit (not shown) connected to the control unit 17, and then operates a start button (not shown) to start the cleaning operation. Thereby, the control unit 17 executes the cleaning operation based on the operation course. The control unit 17 sequentially executes the washing process, the rinsing process and the drying process by the method described below.

First, the washing process of the washing operation will be described. The control unit 17 first operates the water supply valve 4 b to supply a predetermined amount of washing water to the washing tank 2 . When the water supply is completed, the detergent supply device 16 feeds the detergent. Then, the washing pump 3b is driven to pressure-feed the washing water, and the washing water is jetted from the washing nozzle 3c arranged at the washing tank bottom 2b to circulate the washing water. The controller 17 energizes the heater 14 while circulating the washing water to heat the washing water. At this time, the controller 17 detects the temperature of the washing water by the temperature sensor 15 through the wall of the washing tank bottom 2b. Then, the control unit 17 controls the washing water to have a predetermined temperature.

The jetted cleaning water cleans dirt on the object 13 to be cleaned, passes through the residue filter 9 and the water reservoir 8, and is sucked into the cleaning pump 3b again. At this time, the residue contained in the washing water is captured by the residue filter 9 . The cleaning pump 3b pressure-feeds the sucked cleaning water and supplies the cleaning water to the cleaning nozzle 3c. That is, the washing water circulates as described above to wash the object 13 to be washed. The control unit 17 performs the circulation operation as described above for a predetermined time (for example, 30 minutes).

After completing the circulation operation, the control unit 17 discharges the washing water containing dirt to the outside of the housing 1 . At this time, the residue captured by the residue filter 9 is discharged out of the housing 1 together with the washing water. Then, the control unit 17 ends the washing process, starts the rinsing process, and newly supplies washing water into the washing tank 2 . The flow of washing water in the circulating operation, the draining operation, and the water supplying operation will be described later in detail.

Next, the control unit 17 operates the washing pump 3b to jet new washing water from the washing nozzle 3c toward the object 13 to be washed, as in the washing process. Then, the remaining detergent and residue are washed away from the object to be washed 13 with washing water. At this time, the control unit 17 repeats the operation of discharging the cleaning water and supplying the cleaning water a plurality of times (for example, two to three times) to perform the rinsing process. Especially in the last rinsing operation, heat rinsing is performed by heating the wash water to a high temperature. As a result, the object to be cleaned 13 and the inside of the cleaning tank 2 are heated to a high temperature, and the evaporation of water in the drying process is accelerated.

After the rinsing process is completed, the control unit 17 performs the drying process. The control unit 17 controls the fan (not shown) and the heater 14 to heat the air introduced into the cleaning tank 2 and exhaust the moist air from the cleaning tank 2 through a communication passage (not shown). , the object 13 to be cleaned is dried. After performing the drying process for a predetermined time (for example, 30 minutes), the control unit 17 terminates the washing operation of the dishwasher.

Next, the washing water flow in the washing process and the rinsing process of the dishwasher, the circulation operation, the drain operation and the water supply operation will be described in detail.

First, the flow of washing water in the circulation operation in the washing process will be described with reference to FIG. FIG. 9 is an explanatory diagram showing the flow of washing water in the circulation operation. In the circulation operation, the washing water flows, for example, as schematically shown arrows W1 and W2. That is, the washing water flows from the washing tank bottom 2b through the residue filter 9 into the water reservoir 8, and is sucked into the circulation water passage 3a from the circulation water passage port 3d provided in the second water reservoir 8b. The washing water flow is generated by driving the washing pump 3b and sucking it.

During the circulation operation, part of the washing water indicated by the arrow W1 passes through the punched holes of the first filter 9a and flows into the first water reservoir 8a. Then, it flows directly into the circulating water channel 3a from the circulating water channel port 3d. At this time, the residue of 1 mm or less passes through the punching holes and circulates together with the washing water.

The rest of the washing water indicated by arrow W2 flows into the second filter 9b while containing at least the residue of a size that cannot pass through the punched holes. Washing water passes through the second filter 9b from the inside to the outside. Here, large debris is captured which cannot pass through the second filter 9b. The wash water that has passed through the second filter 9b passes through the third filter 9c from the inside to the outside. At this time, debris that cannot pass through the mesh member 9d of the third filter 9c is captured. Since the mesh holes in the mesh member 9d are small, most of the debris is captured here.

In this way, in the washing process, large residues are captured by the second filter 9b while washing water is repeatedly circulated. Even if the small residue initially passes through the punched holes of the first filter 9a, it flows into the second filter 9b with the lapse of time and is captured and deposited in the third filter 9c. The control unit 17 cleans the object 13 to be cleaned for a predetermined time while reducing the residue contained in the cleaning water by circulating the cleaning water.

Next, the flow of cleansing water in the draining operation will be described with reference to FIG. FIG. 10 is an explanatory diagram showing the flow of washing water in the drain operation. In the draining operation, the wash water flows, for example, as schematically shown arrows W3 and W4. That is, the washing water flows from the washing tank bottom 2b through the residue filter 9 into the water reservoir 8, and is sucked into the drainage channel 7a through the drain port 7c provided in the vicinity of the water reservoir bottom 8c. This washing water flow is caused by the drain pump 7b being driven and sucked.

In the draining operation, part of the washing water indicated by the arrow W3 passes through the punched holes of the first filter 9a and flows into the first water reservoir 8a. Then, it flows directly into the second water reservoir 8b and passes through the entire surface of the third filter 9c from the outside to the inside. At this time, the small debris accumulated on the third filter 9c is subjected to water pressure in the direction opposite to the circulation operation, and is peeled off from the mesh member 9d. The residue peeled off in this way is discharged out of the housing 1 together with the washing water through the drain port 7c and the drain channel 7a.

The rest of the washing water indicated by arrow W4 flows into the second water reservoir 8b through the second filter 9b. Washing water passes through the grid on the bottom of the second filter 9b from the inside to the outside. pass towards This washing water flows downward along the inner surface of the third filter 9c and contributes to scraping off the residue.

In this way, when the wash water is drained as a draining operation, large debris remains captured by the second filter 9b, and small debris deposited on the inner surface of the third filter 9c is stripped off by the wash water. , and is discharged out of the housing 1 together with the cleaning water through the drain port 7c through the drain pump 7b, as indicated by an arrow W5. This completes the washing process.

Next, the flow of cleansing water in the water supply operation in the rinsing process will be described with reference to FIG. FIG. 11 is an explanatory diagram showing the flow of washing water in the water supply operation. In the water supply operation, the washing water flows, for example, as schematically shown arrows W5 and W6. That is, the wash water flows from the water supply portion 4 into the water reservoir portion 8 and reaches the inner region of the filter 9 . The wash water is vigorously injected into the second water reservoir 8b from the water inlet 4c through the water supply passage 4a. The inflow of the wash water is caused by opening the water supply valve 4b and applying water pressure. Further, an arc-shaped guide portion 20 is provided at a position facing the water inlet 4c.

In the water supply operation, the flushing water that has been injected flows along the bottom 8c of the water reservoir and collides with the opposing guide 20 as indicated by an arrow W5. The washing water flows upward along the guide portion 20 as indicated by an arrow W6, disperses toward the third filter 9c, and flows along the inner surface of the mesh member 9d of the third filter 9c or along the mesh member 9d. It penetrates and flows. At this time, in the above-described draining operation, fine residues and dirt adhering to the third filter 9c without being stripped off are stripped off and washed.

In the dishwashing of the present embodiment, the water inlet 4c and the water outlet 7c are separated in the circumferential direction and provided so as not to face each other, and the washing water flowing in from the water inlet 4c flows into the inner surface of the third filter 9c. It has a guide part 20 that guides it. With this configuration, the supplied washing water is led to effectively hit the inner peripheral surface of the third filter 9c, and the washing effect of the washing water on the inner peripheral surface of the third filter 9c can be improved. In this way, it is possible to suppress the residue remaining in the third filter 9c.

In particular, the flow of wash water in the drain operation was primarily from top to bottom, while the flow of wash water in the water supply operation was in the opposite direction, from bottom to top. Furthermore, it is a situation in which wash water accumulates, and a swirling flow is also generated. This increases the possibility that even residue that was not removed by the draining operation will be removed. In addition, the guide part 20 is not limited to the configuration described in the present embodiment, and may be formed so that the injected cleaning water flows to the inner surface of the third filter 9c to clean it.

As in the washing process, the control unit 17 operates the washing pump 3b when the water supply is completed to perform the circulation operation. The circulation operation is the same as the washing process. However, due to the circulation operation in the washing process, large residues are already trapped in the second filter 9b. Also, most of the small residue is discharged outside the housing 1 by the draining operation. Residue stripped from the third filter 9c by the water supply operation is discharged to the outside of the housing 1 by the water discharge operation after the circulation operation. Therefore, in the rinsing process, by repeating the water supply operation, the circulation operation, and the water discharge operation, at the end of the rinsing process, most of the small residue is discharged out of the housing 1, and the third filter 9c is also repeatedly washed, leaving no residue. is suppressed.

In other words, it is after the water is drained in the washing process that the residue is most likely to remain on the third filter 9c after water is drained. Therefore, the first water supply in the rinsing process has a remarkable effect of cleaning the third filter 9c by water supply. By repeating water supply multiple times in the rinsing process, most of the residue adhering to the third filter 9c is washed away. In the water supply in the washing process, the residue left after the previous washing operation is washed. However, basically, the third filter 9c has been washed up to the last water supply in the previous washing operation, and the remaining residue is extremely small. As described above, according to the present embodiment, the third filter 9c is washed each time water is supplied, and residue can be suppressed.

As described above, the housing 1, the cleaning tank 2 provided in the housing 1 and containing the object to be cleaned 13, the water supply unit 4 for supplying the cleaning water into the cleaning tank 2, and the A washing device 3 for washing the accommodated objects 13 to be washed, a water reservoir 8 provided at the bottom of the washing tank 2, a residue filter 9 formed in a cylindrical shape and detachably fixed to the water reservoir 8, and a water reservoir. A circulating water passage 3a that communicates between the portion 8 and the washing device 3, a washing pump 3b that is provided in the circulating water passage 3a and feeds the washing water in the washing tank 2 to the washing device 3, and a water reservoir portion 8 and the outside of the housing 1. It is provided with a communicating drainage channel 7a and a control unit 17 for executing a cleaning operation including a washing process and a rinsing process. Furthermore, the residue filter 9 captures the residue contained in the wash water flowing into the water reservoir 8 due to the operation of the wash pump 3b on its inner surface, and when the wash water is discharged outside the housing 1, it captures the residue. The water supply unit 4 includes a water supply passage 4 a that allows the supplied cleaning water to flow into the inner region of the residue filter 9 .

With this arrangement, the debris filter 9 captures debris from the wash water circulating through the wash pump 3b during the washing process. When the cleaning by circulation of the cleaning water is completed, the cleaning water is drained. At this time, the trapped debris is peeled off from the inner surface of the debris filter 9 by the flow of the washing water, and discharged out of the housing 1 together with the washing water. However, debris may remain attached to the inner surface of the debris filter 9 . Wash water is supplied again in the next rinsing step. A water supply passage 4a included in the water supply unit 4 allows the wash water to flow into the inner region of the filter 9 without leaving it behind. At this time, the wash water hits the inner surface of the residual filter 9 or flows along the inner surface. As a result, the residue adhering to the inner surface of the residue filter 9 is stripped off from the inner surface. Then, it is caught again by the circulation of the washing water in the rinsing process, and discharged out of the housing 1 together with the washing water by the draining operation. In this way, with a simple configuration, the residue filter 9 can be washed without spending extra time during the cleaning operation, and residue remaining on the residue filter 9 can be suppressed.

As described above, the draining operation may be performed by allowing the wash water to naturally drop due to gravity without using the drain pump 7b. According to the natural fall, troubles such as failure and clogging of the drainage pump 7b can be prevented. However, as the drainage progresses and the amount of washing water decreases, the momentum of the drainage decreases, and the force of stripping off the residue from the third filter 9c also decreases. With the drain pump 7b, the water can be drained with a constant force, and the power to strip off the residue from the third filter 9c does not decrease as the drain progresses, and the drain time can be shortened.

In addition, in the dishwasher of the present embodiment, the cleaning tub 2 has been described as having a pull-out configuration, but the configuration is not limited to this. For example, it can be applied to a drawer-type dishwasher as shown in FIG. In FIG. 7, a cleaning tank 72 is configured inside a housing 71 . The door 73 is supported by support rails 74 and slides back and forth to open and close the front opening 72 a of the cleaning tank 72 . The tableware basket 75 is supported by basket rails 76 and locked to the door 73 to slide back and forth. Furthermore, although not shown, the front door may be a front open type dishwasher in which the lower end is hinged and the upper end is pivoted forward and downward to be opened and closed.

As described above, in the dishwasher according to the present invention, even if the residue captured by the residue filter remains on the inner surface of the residue filter during the washing process, water is supplied during the subsequent rinsing process. Residual debris is washed away when the wash water flows into the interior area of the debris filter. As a result, it is possible to wash the residue filter without spending extra time during the washing operation with a simple configuration and to suppress the residue remaining on the residue filter, so it is suitable for household dishwashers. Useful.

1 housing 1a front opening 2 cleaning tank 2a top opening 2b cleaning tank bottom 3 cleaning device 3a circulating water channel 3b cleaning pump 3c cleaning nozzle 3d circulating channel port 4 water supply unit 4a water supply channel 4b water supply valve 4c water inlet 5 door 6 Tableware basket 7 Drainage section 7a Drainage channel 7b Drainage pump 7c Drainage port 7d Projection 8 Water reservoir 8a First water reservoir 8b Second water reservoir 8c Water reservoir bottom 9 Residual filter 9a First filter 9b Second filter 9c Third filter 9d Mesh member 10 Inner lid 11 Link mechanism 12 Sealing part 13 Object to be washed 14 Heater 15 Temperature sensor 16 Detergent supply device 17 Control part 18 Opening 19 Engagement part 20 Guide part 71 Case 72 Cleaning tank 72a Front opening 73 Door body 74 support rail 75 tableware basket 76 basket rail SK system kitchen

Claims (3)

a housing, a washing tank provided in the housing for accommodating an object to be washed, a water supply section for supplying washing water into the washing tank, and a water reservoir section recessed further into the bottom of the washing tank; A residue filter which is formed in a cylindrical shape and is detachably fixed to the water reservoir, a washing nozzle for spraying washing water onto the objects to be washed contained in the washing tank, and the water reservoir and the washing nozzle. a circulating water channel communicating with each other; a circulating water channel port of the circulating water channel provided in the water reservoir; a washing pump provided in the circulating water channel for sending washing water in the water reservoir to the washing nozzle; a drainage channel that communicates with the outside of the body; a drain port of the drainage channel provided near the bottom of the water reservoir; a water supply channel that communicates the water reservoir with the water supply; and a control unit that performs a washing operation including a washing process and a rinsing process,
The circulating water channel port and the drain port are provided at positions substantially facing each other in a top view,
The residue filter captures residue contained in the cleaning water flowing from the cleaning tank through the residue filter into the circulating water passage port by the operation of the cleaning pump on the inner surface, and the cleaning water passes through the cleaning water. configured such that a part of the captured residue is discharged together with the washing water when discharged to the outside of the housing via the drain port and the drain channel ;
The water inlet is arranged near the bottom of the water reservoir below the lower end of the residue filter . flow from below the unclean filter toward the inner region of the unclean filter ;
dishwasher. A drainage pump provided in the drainage path for discharging the cleaning water in the cleaning tank to the outside of the housing, and a drainage pump provided upstream of the residue filter and having a size sufficient to cause problems when the cleaning water circulates. a pre-filter that captures debris;
A dishwasher according to claim 1. The water inlet and the water outlet are separated in the circumferential direction and provided so as not to face each other,
a guide part that guides the wash water that has flowed in from the water inlet toward the inner surface of the residue filter;
3. A dishwasher as claimed in claim 1 or 2 .

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