JP2019205599A - dishwasher - Google Patents

Abstract

To provide a dishwasher having a simple structure and washing a food particle filter without spending any excessive time in a washing operation to prevent food particles from remaining in the food particle filter.SOLUTION: A dishwasher includes: a water supply part 4 supplying washing water to the inside of a washing tank 2; a washing nozzle 3c jetting the washing water to objects to be washed 13; a water reservoir part 8 provided at the bottom part of the washing tank 2; a food particle filter 9 fixed to the water reservoir part 8; a circulation water passage 3a making the water reservoir part 8 and the washing nozzle 3c communicate with each other; a washing pump 3b sending the washing water in the water reservoir part 8 to the washing nozzle 3c; a drainage passage 7a making the water reservoir part 8 and the outside of a housing 1 communicate with each other; and a control part 17 performing a washing operation. The food particle filter 9 is structured so as to catch food particles included in the washing water flowing into the water reservoir part 8 by the operation of the washing pump 3b with its inner surface and also discharge the caught food particles together with the washing water when the washing water is discharged outside the housing 1. The water supply part 4 includes a water supply passage 4a making the supplied washing water flow into the inside area of the food particle filter 9.SELECTED DRAWING: Figure 11

Description

  The present invention relates to a dishwasher for cleaning an object to be cleaned such as tableware stored in a cleaning 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 cleaning tank 101 for storing tableware is provided in the main body. A cleaning pump 102 that sucks water from the bottom and sprinkles water into the cleaning tank 101 is provided at the bottom of the cleaning tank 101. The drainage pump 103 sucks water from the bottom of the cleaning tank 101 and drains it outside the machine through the drainage channel. The residue filter 107 includes a residue car 104, a metal plate 105, and a metal mesh unit 106. The remnant basket 104 collects large food residues at the time of washing and draining. The metal plate 105 has an inclined portion for allowing the residue to flow to the residue car 104 and a drain hole. The metal mesh portion 106 prevents residues from entering the cleaning pump 102. The water injection pipe 108 as water injection means is provided on the outer periphery of the metal mesh portion 106, and sprays water from the outside to the inside to remove the residue adhering to the metal mesh portion 106.

  When the operation of the dishwasher is started, water is supplied, and water accumulates at the bottom of the washing tank 101. The accumulated water is sprinkled into the washing tank 101 by the washing pump 102 to wash the dishes. After the completion of the cleaning, the drain pump 103 operates to discharge the water in the cleaning tank 101 to the outside through the drainage channel. When the operation of the drainage pump 103 is stopped, spraying from the outside of the metal mesh portion 106 from the water injection pipe 108 in the outer periphery of the metal mesh portion 106 of the residue filter 107 removes the adhesion of residue to the inside. When the water injection is completed, the drainage pump 103 is activated again, and the accumulated water is sucked from the bottom of the washing tank 101 by the drainage pump 103 and discharged out of the machine through the drainage channel.

  According to the above configuration, fine food residue adhered to the residue filter 107 is washed away inside the metal mesh portion 106. For this reason, the food residue smell does not remain in the dishwasher cabinet after washing, and no odor transfer occurs in the dishes.

Japanese Patent Laid-Open No. 04-224725

  The conventional dishwasher ejects water from the outside of the metal mesh portion to remove the attached residue. However, in order to inject water into 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 has the problem that the structure of the water injection means becomes complicated.

  Moreover, after washing | cleaning of tableware is complete | finished and after a drainage pump stops, it drains, after spraying water on a metal mesh part again. This method has a problem that the operation time of the dishwasher becomes long.

  The present invention solves the above-described conventional problems, and when water is supplied in the washing process and the rinsing process, water is poured into the inside of the metal mesh portion from the water inlet having a simple structure and washed. Accordingly, an object of the present invention is to provide a dishwasher that cleans a metal mesh portion with a simple configuration without taking extra time and suppresses residue remaining on the residue filter.

In order to achieve the above object, the dishwasher of the present invention provides
Formed in a cylindrical shape, a casing, a cleaning tank provided in the casing for containing an object to be cleaned, a water supply section for supplying cleaning water into the cleaning tank, a water reservoir section provided at the bottom of the cleaning tank A residual filter that is detachably fixed to the water reservoir, a cleaning nozzle that injects cleaning water onto an object to be cleaned contained in the cleaning tank, and a circulation channel that connects the water reservoir and the cleaning nozzle. A cleaning pump that is provided in the circulating water channel and feeds the cleaning water in the water reservoir to the cleaning nozzle, a drain channel that connects the water reservoir and the outside of the housing, and a cleaning operation including a cleaning step and a rinsing step. A control unit to be executed. Further, the residue filter captures residue contained in the wash water flowing into the water reservoir by the operation of the wash pump on the inner surface, and also when the wash water is discharged out of the housing. The residue is configured to be discharged together with the cleaning water, and the water supply unit includes a water supply path for allowing the supplied cleaning water to flow into an inner region of the residue filter.

  With this configuration, even if the residue captured by the residual filter in the washing process remains attached to the inner surface of the residual filter, the cleaning water supplied in the subsequent rinsing process or the like remains in the inner region of the residual filter. Rinse any residue left over as it flows into. Thereby, it is possible to clean the residual filter with a simple configuration without taking extra time in the cleaning operation, and it is possible to suppress residual residue in the residual filter.

  The dishwasher of the present invention has a simple configuration and can wash the residue filter without taking extra time during the washing operation, and can suppress the residue from remaining in the residue filter.

Side cross-sectional schematic diagram of the dishwasher in Embodiment 1 of this invention The top view of the bottom part of the washing tank of the dishwasher in Embodiment 1 of this invention AA sectional view of FIG. FIG. 2 is a plan view of the state where the residual filter is removed from the state of FIG. BB sectional view of FIG. The side view of the bottom vicinity of the washing tub of the dishwasher in Embodiment 1 of this invention CC sectional view of FIG. The disassembled perspective view which isolate | separated the residue filter of the dishwasher in Embodiment 1 of this invention from the water reservoir part Explanatory drawing which shows the flow of the washing water in the circulation operation | movement of the dishwasher in Embodiment 1 of this invention. Explanatory drawing which shows the flow of the washing water in the drainage operation | movement of the dishwasher in Embodiment 1 of this invention. Explanatory drawing which shows the flow of the washing water in the water supply operation | movement of the dishwasher in Embodiment 1 of this invention The perspective view of the dishwasher in other embodiment of this invention Side sectional view of a conventional dishwasher

The dishwasher of the first invention is
Formed in a cylindrical shape, a casing, a cleaning tank provided in the casing for containing an object to be cleaned, a water supply section for supplying cleaning water into the cleaning tank, a water reservoir section provided at the bottom of the cleaning tank A residual filter that is detachably fixed to the water reservoir, a cleaning nozzle that injects cleaning water onto an object to be cleaned contained in the cleaning tank, and a circulation channel that connects the water reservoir and the cleaning nozzle. A cleaning pump that is provided in the circulating water channel and feeds the cleaning water in the water reservoir to the cleaning nozzle, a drain channel that connects the water reservoir and the outside of the housing, and a cleaning operation including a cleaning step and a rinsing step. A control unit to be executed. Further, the residue filter captures residue contained in the wash water flowing into the water reservoir by the operation of the wash pump on the inner surface, and also when the wash water is discharged out of the housing. The residue is configured to be discharged together with the cleaning water, and the water supply unit includes a water supply path for allowing the supplied cleaning water to flow into an inner region of the residue filter.

  With this configuration, even if the residue captured by the residual filter in the washing process remains attached to the inner surface of the residual filter, the cleaning water supplied in the subsequent rinsing process or the like remains in the inner region of the residual filter. Rinse any residue left over as it flows into. Thereby, it is possible to clean the residual filter with a simple configuration without taking extra time in the cleaning operation, and it is possible to suppress residual residue in the residual filter.

In particular, the second invention is the first invention,
A drainage pump that is provided in the drainage channel and discharges the cleaning water in the cleaning tank to the outside of the housing, and is large enough to cause a problem when the cleaning water is provided upstream of the residual filter. And a pre-filter for capturing the residue. With this configuration, the prefilter captures a large residue, so that the large residue does not flow into the drainage channel, and it is possible to suppress the occurrence of problems such as clogging the drainage channel and drainage pump. .

In particular, the third invention is the first or second invention,
The water supply path includes a water injection port serving as an outlet to the water reservoir, the drainage channel includes a water discharge port serving as an inlet from the water reservoir, and the water injection port and the water discharge port are provided for the residue filter. It is provided in the vicinity of the bottom of the water reservoir below. With this configuration, in the water supply operation, a water flow in the direction opposite to that of the drainage operation can be applied to the residue filter, and the residue that has not been removed by the drainage operation can be removed. Further, it is possible to apply or follow the water flow of the water supply to the bottom of the water reservoir where dirt is likely to accumulate, and to suppress the accumulation of dirt on the bottom of the water reservoir.

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

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

(Embodiment 1)
FIG. 1 is a schematic side sectional view of the dishwasher according to Embodiment 1 of the present invention. FIG. 1 shows a state in which the dishwasher is built in the system kitchen SK. In the description of each embodiment, as shown in the figure, the front direction is the direction in which the door body 5 and the cleaning tank 2 are pulled out, and the rear direction is the direction in which the cleaning tank 2 is stored and the door body 5 is closed. explain. Further, the dishwasher installation side will be described as the lower side, the opposite side as the upper side, and the right side toward the front of the door body 5 will be described as the right side and the left side will be described as the left side.

As shown in FIG. 1, the dishwasher of this Embodiment contains the housing | casing 1, the washing tank 2, the washing | cleaning apparatus 3, the water supply part 4, the door body 5, and the waste_water | drain part 7 grade | etc.,. In the following embodiments, as shown in the figure, the front direction is the direction in which the door body 5 and the cleaning tank 2 are pulled out, and the rear direction is the cleaning tank 2.
Is described as a direction in which the door 5 is closed. Further, the dishwasher installation side will be described as the lower side, the opposite side as the upper side, and the right side toward the front of the door body 5 will be described as the right side and the left side will be described as the left side.

  The housing 1 has a front opening 1a on the front surface. The washing tub 2 includes a table basket 6, a washing nozzle 3 c, a water reservoir 8, a residue filter 9, and the like. The cleaning tank 2 is provided in the housing 1 so that it can be taken in and out in the front-rear direction. The cleaning tank 2 has an upper surface opening 2a on the upper surface. The upper surface opening 2 a is closed by an inner lid 10 disposed in the housing 1 when the cleaning tank 2 is accommodated in the housing 1. The inner lid 10 moves up and down by the link mechanism 11 in conjunction with the insertion and removal of the cleaning tank 2. A seal portion 12 formed of a deformable hollow rubber tube is provided at the periphery of the upper surface opening 2a. When the cleaning tank 2 is accommodated in the housing 1, the seal portion 12 is compressed by the descending inner lid 10 and the upper surface opening 2 a is sealed.

  In the tableware basket 6, an object to be cleaned 13 such as tableware is placed. The door body 5 is provided in the front part of the washing tank 2 and covers the front surface of the housing 1 when stored. The water supply unit 4 includes a water supply channel 4a and a water supply valve 4b. The water supply path 4a is connected to a water pipe (not shown). The water supply valve 4 b is provided in the water supply path 4 a in the rear part inside the housing 1. The water supply valve 4b supplies tap water as cleaning water to the cleaning tank 2 when opened.

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

  The cleaning nozzle 3c is provided on the cleaning tank bottom 2b. The cleaning pump 3b pumps cleaning water to the cleaning nozzle 3c. The cleaning nozzle 3c jets the cleaning water toward the object to be cleaned 13 while rotating by the reaction force of the pumped cleaning 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 cleaning water sprayed from the cleaning nozzle 3c collides with the object 13 to be cleaned, cleans it, and performs cleaning. The cleaning water includes a cleaning liquid that includes a detergent and is sprayed onto the object to be cleaned 13 and rinse water for rinsing the object to be cleaned 13.

  The water reservoir 8 is provided on the cleaning tank bottom 2 b in the cleaning tank 2. The residue filter 9 is detachably provided in the water reservoir 8 and captures residue that has been cleaned and removed from the object 13 to be cleaned. The water reservoir 8 and the residual filter 9 will be described in detail later. The heater 14 heats the washing water stored in the washing tank 2 in the washing step or the rinsing step. The heater 14 heats the drying air in the cleaning tank 2 in the drying process. The temperature sensor 15 is disposed 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 the side surface of the cleaning tank 2 facing the door body 5.

  The drainage unit 7 discharges the cleaning water flowing into the water reservoir 8 to the outside of the housing 1. The drainage unit 7 includes a drainage channel 7a, a drainage pump 7b, a drainage port 7c, and the like. In addition, about the drainage pump 7b, it may be comprised so that it can substitute as a drainage pump by reversing the rotation direction of the motor at the time of circulation for the washing pump 3b. In addition, a drain valve may be provided instead of the drain pump 7b, and the wash water may be drained by a natural fall due to gravity by opening the drain valve.

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

  Next, the configuration of the water reservoir 8 provided in the cleaning tank bottom 2b and the water supply unit 4, the residual filter 9 and the drainage unit 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 the line AA of FIG. FIG. 4 is a plan view of the state in which the residual filter 9 is removed from the state of FIG. 5 is a cross-sectional view taken along the line BB in FIG. FIG. 6 is a side view of the lower part of the cleaning tank 2. 7 is a cross-sectional view taken along the line CC of FIG. FIG. 8 is an exploded perspective view of the residual filter 9 separated from the water reservoir 8.

  In the washing tank bottom 2b, a water reservoir 8 for storing the supplied washing water in the washing process and the rinsing process is recessed in two stages. As shown in FIG. 4, the first-stage first water reservoir 8 a is provided shallowly in a generally rectangular shape toward the front at the center of the right and left of the cleaning tank 2. And as shown in FIG. 3 and FIG. 5, it forms in the downward inclination toward the center. The second water reservoir 8b at the second stage is provided at 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 that is an inlet of the circulating water channel 3a, a water injection port 4c that is an outlet of the water supply channel 4a, and an inlet of the drain channel 7a. And a drain outlet 7c. The circulating water channel port 3d is provided as an aggregate of a large number of square holes (for example, 2 mm square) over the middle of the second water reservoir 8b in the vertical direction over about a half circumference. The water injection port 4c and the drainage port 7c are provided in the circumferential direction away from 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 4 c and the water outlet 7 c are disposed so as not to face each other.

  As shown in FIG. 8, a residual filter 9 is detachably provided in the water reservoir 8. The residual filter 9 is configured by three types of filters, a first filter 9a, a second filter 9b, and a third filter 9c, so that each can be decomposed. Specifically, the third filter 9c is provided in the center of the first filter 9a, and the second filter 9b is provided on the inner side upstream of the third filter 9c.

  The first filter 9a is formed of stainless steel punching metal, and is provided so as to cover the first water reservoir 8a on the extension line of the cleaning tank bottom 2b. The first filter 9a has a punching hole (for example, φ1 mm × pitch 2 mm) through which a residue having a size that does not cause problems such as clogging the circulating water passage 3a and the cleaning pump 3b. In the center, an opening 18 for inserting the third filter 9c is formed.

  The second filter 9b is made of resin (for example, polypropylene (PP)) and has a bottomed cylindrical shape. As will be described later, the residue passing through the second filter 9b is discharged out of the housing 1 together with the cleaning water during drainage. For this reason, a surface lattice is formed so that a residue having a size (for example, exceeding 5 × 5 × 20 mm) that locks the drain pump 7b or clogs the drain channel 7a does not pass. In the event that a large residue has passed through the second filter 9b, the drain port 7c has a size that locks the drain pump 7b or clogs the drain channel 7a. The protrusion 7d is formed so that the remainder (for example, exceeding 5 × 5 × 20 mm) does not pass through. The projection 7d suppresses clogging of the drainage portion 7 and the like. The second filter is useful as a prefilter, particularly when the drainage pump 7b is provided.

The third filter 9c is formed by attaching a mesh member 9d having a fine opening such as a wire mesh plain weave mesh (for example, 50 mesh to 100 mesh or a square hole mesh of about 0.28 mm) to the peripheral side surface of the cylindrical lattice. The The residue passing through the second filter 9b is captured by the third filter 9c except for the fine residue. And the residue captured by the 3rd filter 9c is discharged | emitted out of the housing | casing 1 with washing water at the time of drainage.

  The first filter 9a is fixed by inserting and fixing the third filter 9c into the central opening. The third filter 9c is fixed by being screwed into a rotation engaging portion (not shown) formed in the vicinity of the water reservoir bottom 8c. The second filter 9b is inserted into the third filter 9c in a predetermined direction and pushed to the end, so that the second filter 9b is fixed by two pairs of engaging portions 19 formed facing the upper part.

  As described above, the dishwasher of the present embodiment is configured.

  Next, the use and operation of the dishwasher having the above configuration will be described. First, the user holds 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 raised by the link mechanism 11 in conjunction with the pulling-out operation of the cleaning tank 2 and is separated from the upper surface opening 2a. Next, the user sets an object to be cleaned 13 such as tableware in the tableware basket 6 from the upper surface opening 2 a of the cleaning tank 2. Then, a predetermined amount of detergent is put into the detergent supply device 16 in the cleaning tank 2. Next, the user pushes the cleaning tank 2 into the housing 1 and closes the door body 5. At this time, the inner lid 10 is lowered by the link mechanism 11 in conjunction with the pushing operation of the cleaning tank 2, compresses the seal portion 12, and seals the upper surface opening 2a.

  The user sets an operation course with an operation unit (not shown) connected to the control unit 17, and then operates a start button (not shown) to start a cleaning operation. Thereby, the control part 17 performs a washing | cleaning driving | operation based on an operation course. The control part 17 performs a washing process, a rinse process, and a drying process in order by the method demonstrated below.

  First, the washing process of the washing operation will be described. First, the control unit 17 operates the water supply valve 4 b to supply a predetermined amount of cleaning water to the cleaning tank 2. When the water supply is completed, the detergent is supplied by the detergent supply device 16. Then, the cleaning pump 3b is driven to pump the cleaning water, the cleaning water is ejected from the cleaning nozzle 3c disposed on the cleaning tank bottom 2b, and the cleaning water is circulated. The controller 17 energizes the heater 14 while circulating the cleaning water to heat the cleaning water. At this time, the control unit 17 detects the temperature of the cleaning water by the temperature sensor 15 through the wall of the cleaning tank bottom 2b. And the control part 17 controls so that washing water becomes predetermined temperature.

  The sprayed cleaning water cleans the object 13 to be cleaned, passes through the residual 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 pumps the sucked cleaning water and supplies the cleaning water to the cleaning nozzle 3c. That is, the cleaning water is circulated as described above to clean the article 13 to be cleaned. The control unit 17 performs the above-described circulation operation for a predetermined time (for example, 30 minutes).

  When the circulation operation is finished, the control unit 17 discharges cleaning water containing dirt out 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 cleaning water. And the control part 17 starts a rinse process while complete | finishing a washing process, and supplies a wash water in the washing tank 2 anew. The flow of cleaning water in the circulation operation, the drain operation, and the water supply operation will be described in detail later.

Next, similarly to the washing step, the control unit 17 operates the washing pump 3b and injects new washing water from the washing nozzle 3c toward the object 13 to be washed. Then, the remaining detergent and residue are washed away from the object to be cleaned 13 with the washing water. At this time, the control unit 17 repeatedly performs operations such as discharge of cleaning water and supply of cleaning water a plurality of times (for example, two to three times) to perform a rinsing process. In particular, in the final rinsing operation, heating rinsing for heating the washing water to a high temperature is performed. Thereby, the to-be-cleaned object 13 and the inside of the cleaning tank 2 are heated to a high temperature, and moisture evaporation in the drying process is promoted.

  And the control part 17 performs a drying process, after a rinse process is complete | finished. The control unit 17 controls the blower fan (not shown) and the heater 14 and discharges the humid air in the cleaning tank 2 through the communication passage (not shown) while heating the air introduced into the cleaning tank 2. Then, the object to be cleaned 13 is dried. The control part 17 complete | finishes the washing | cleaning driving | operation of a dishwasher, after performing a drying process for predetermined time (for example, 30 minutes).

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

  First, the flow of washing water in the circulation operation of the washing process will be described with reference to FIG. FIG. 9 is an explanatory diagram showing the flow of cleaning water in the circulation operation. In the circulation operation, the washing water flows, for example, as indicated by arrows W1 and W2. That is, the cleaning water flows from the cleaning tank bottom 2b through the residual filter 9 to the water reservoir 8 and is sucked into the circulation water channel 3a from the circulation water channel port 3d provided in the second water reservoir 8b. This flow of cleaning water is generated when the cleaning pump 3b is driven and sucked.

  In the circulation operation, a part of the washing water indicated by the arrow W1 passes through the punching hole of the first filter 9a and flows into the first water reservoir 8a. And it flows in into the circulating water channel 3a from the circulating water channel port 3d as it is. At this time, the remainder of 1 mm or less is circulated through the punching hole together with the washing water.

  The remaining washing water indicated by the arrow W2 flows into the second filter 9b in a state including at least a residue that cannot pass through the punching hole. The washing water passes from the inside to the outside of the second filter 9b. Here, a large residue that cannot pass through the second filter 9b is captured. The wash water that has passed through the second filter 9b passes through the third filter 9c from the inside toward the outside. At this time, a residue that cannot pass through the mesh member 9d of the third filter 9c is captured. Since the mesh hole of the mesh member 9d is small, most of the residue is captured here.

  In this way, in the washing process, while the washing water is repeatedly circulated, a large residue is captured by the second filter 9b. Even if the small residue initially passes through the punching hole of the first filter 9a, the small residue flows into the second filter 9b with the passage of time and is captured and accumulated by the third filter 9c. The controller 17 performs the cleaning of the article 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 cleaning water in the draining operation will be described with reference to FIG. FIG. 10 is an explanatory diagram showing a flow of cleaning water in the draining operation. In the draining operation, the cleaning water flows as indicated by arrows W3 and W4 schematically shown, for example. That is, the cleaning water flows from the cleaning tank bottom 2b through the residual filter 9 to the water reservoir 8 and is sucked into the drainage channel 7a from the drain port 7c provided near the water reservoir bottom 8c. The flow of the washing water is generated when the drainage pump 7b is driven and sucked.

In the draining operation, a part of the washing water indicated by the arrow W3 passes through the punching hole of the first filter 9a and flows into the first water reservoir 8a. And it flows in into the 2nd water reservoir 8b as it is, and passes toward the inside from the outer side in the whole surface of the 3rd filter 9c. At this time, the small residue deposited 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 through the drainage channel 7a from the drainage port 7c together with the washing water.

  The remaining wash water indicated by the arrow W4 flows into the second water reservoir 8b through the second filter 9b. The washing water passes through the bottom grid of the second filter 9b from the inside to the outside. However, if a large residue is accumulated on the bottom of the second filter 9b, the grid on the peripheral side face is moved from the inside to the outside. Pass through. This washing water flows from top to bottom along the inner surface of the third filter 9c, and contributes to the removal of the residue.

  In this way, when the cleaning water is drained as a draining operation, the large residue remains captured by the second filter 9b, and the small residue deposited on the inner surface of the third filter 9c is peeled off by the cleaning water. As indicated by the arrow W5, the water is discharged from the housing 7 through the drain port 7c through the drain pump 7b together with the cleaning water. Thereby, a washing process is complete | finished.

  Next, the flow of cleaning water in the water supply operation of the rinsing process will be described with reference to FIG. FIG. 11 is an explanatory diagram showing the flow of cleaning water in the water supply operation. In the water supply operation, the cleaning water flows as indicated by arrows W5 and W6 schematically shown, for example. That is, the wash water flows from the water supply unit 4 into the water reservoir 8 and reaches the inner region of the residual filter 9. The washing water is poured from the water inlet 4c to the second water reservoir 8b through the water supply channel 4a with a momentum. This inflow of the washing water occurs when the water supply valve 4b is opened and water pressure is applied. Further, an arcuate guide portion 20 is provided at a position facing the water injection port 4c.

  In the water supply operation, the injected wash water flows along the water reservoir bottom 8c and collides with the opposing guide 20 as indicated by an arrow W5. As shown by the arrow W6, the washing water flows upward along the guide portion 20 and is dispersed toward the third filter 9c so as to be along the inner surface of the mesh member 9d of the third filter 9c or the mesh member 9d. It flows through. At this time, in the above-described draining operation, fine residues and dirt adhering without being peeled off from the third filter 9c are peeled off and washed.

  In the dishwashing of the present embodiment, the water inlet 4c and the water outlet 7c are provided so as to be separated from each other in the circumferential direction and not to face each other, and the washing water flowing from the water inlet 4c is applied to the inner surface of the third filter 9c. It has the guide part 20 which guides so that it may face. With this configuration, the supplied cleaning water is guided so as to effectively hit the inner peripheral surface of the third filter 9c, and the cleaning effect of the inner peripheral surface of the third filter 9c by the cleaning water can be improved. In this way, residual residue in the third filter 9c can be suppressed.

  In particular, the flow of cleaning water in the draining operation is mainly from the top to the bottom, but the flow of cleaning water in the water supply operation is in the reverse direction and from the bottom to the top. Furthermore, it is a situation where washing water accumulates, and a vortexing flow is also generated. Thereby, even if the residue that has not been peeled off in the drainage operation is likely to peel off. In addition, the guide part 20 is not restricted to the structure demonstrated in this Embodiment, What is necessary is just to be formed so that the wash water poured may flow to the inner surface of the 3rd filter 9c, and may be washed.

Similarly to the washing step, the controller 17 operates the washing pump 3b when the water supply is completed, and performs a circulation operation. The circulation operation is the same as the washing process. However, a large residue is already captured by the second filter 9b by the circulation operation in the washing process. Further, most of the small residue is discharged out of the housing 1 by the draining operation. And the residue peeled off from the 3rd filter 9c by water supply operation | movement is discharged | emitted out of the housing | casing 1 by the drainage operation | movement after a circulation operation | movement. Therefore, by repeating the water supply operation, the circulation operation, and the drainage operation in the rinsing process, 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 and remains. Residual amount of is suppressed.

  That is, it is most likely that the residue remains in the third filter 9c after draining after draining in the washing process. Therefore, the cleaning effect of the 3rd filter 9c by water supply is remarkable at the first water supply of a rinse process. By repeating the water supply a plurality of times in the rinsing process, the residue adhering to the third filter 9c is almost washed away. And in the water supply in a washing process, the residue remaining in the last washing operation is washed. However, basically, the third filter 9c is cleaned up to the last water supply of the previous cleaning operation, and the remaining residue is extremely small. Thus, according to this Embodiment, the 3rd filter 9c can be wash | cleaned for every water supply, and the residue of a residue can be suppressed.

  As described above, the housing 1, the cleaning tank 2 provided in the casing 1 and containing the object to be cleaned 13, the water supply unit 4 for supplying cleaning water into the cleaning tank 2, and the cleaning tank 2 A cleaning device 3 for cleaning the object to be cleaned 13, a water reservoir 8 provided at the bottom of the cleaning tank 2, a residue filter 9 formed in a cylindrical shape and detachably fixed to the water reservoir 8, A circulating water channel 3a that communicates the part 8 and the cleaning device 3, a cleaning pump 3b that is provided in the circulating water channel 3a and that supplies cleaning water in the cleaning tank 2 to the cleaning device 3, a water reservoir 8 and the outside of the housing 1 A drainage channel 7a that communicates with the controller 17 and a controller 17 that executes a washing operation including a washing step and a rinsing step. Further, the residue filter 9 captures the residue contained in the washing water flowing into the water reservoir 8 by the operation of the washing pump 3b on the inner surface, and captures when the washing water is discharged out of the housing 1. The remaining water is discharged together with the cleaning water, and the water supply unit 4 includes a water supply path 4 a that allows the supplied cleaning water to flow into the inner region of the residual filter 9.

  With this configuration, the residue filter 9 captures residue from the washing water circulating through the washing pump 3b in the washing step. When the cleaning by circulating the cleaning water is finished, the cleaning water is drained. At this time, the trapped residue is peeled off from the inner surface of the residue filter 9 by the flow of the cleaning water and discharged out of the housing 1 together with the cleaning water. However, the residue may remain attached to the inner surface of the residue filter 9. In the next rinsing step, cleaning water is supplied again. The water supply path 4 a included in the water supply unit 4 leaves the wash water and flows it into the inner region of the filter 9. At this time, the washing water hits the inner surface of the remaining filter 9 or flows along the inner surface. As a result, the residue remaining on the inner surface of the residue filter 9 is peeled off from the inner surface. Then, it is captured again by the circulation of the washing water in the rinsing process, and is discharged out of the housing 1 together with the washing water by the draining operation. In this way, the residue filter 9 can be washed with a simple configuration without taking extra time in the washing operation, and the residue remaining in the residue filter 9 can be suppressed.

  As described above, the draining operation may be a natural fall due to the gravity of the washing water that does not use the drain pump 7b. According to the natural fall, troubles such as a failure and clogging of the drain pump 7b can be prevented. However, as the drainage progresses and the washing water decreases, the momentum of the drainage decreases, and the force for stripping the residue from the third filter 9c also decreases. With the drainage pump 7b, the drainage can be performed with a constant force, and the draining time can be shortened without decreasing the force for stripping the residue from the third filter 9c as the drainage proceeds.

  Moreover, in the dishwasher of this Embodiment, although the washing tank 2 demonstrated with the drawer-type structure, it is not restricted to this. For example, a drawer type dishwasher as shown in FIG. 7 can be applied. In FIG. 7, a cleaning tank 72 is configured inside the casing 71. The door body 73 is supported by the support rail 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 a car rail 76, is locked to the door body 73, and slides back and forth. Further, although not shown, the front door may be a front open type dishwasher in which the lower end is a hinge and the upper end is pivoted forward and downward.

  As described above, the dishwasher according to the present invention is supplied with water in a subsequent rinsing step or the like even if the residue captured by the residue filter remains attached to the inner surface of the residue filter in the washing step. Wash away the remaining residue as the wash water flows into the inner region of the residue filter. As a result, the residue filter can be washed with a simple configuration without taking extra time in the washing operation, and the residue remaining in the residue filter can be suppressed. Useful.

DESCRIPTION OF SYMBOLS 1 Housing | casing 1a Front opening part 2 Cleaning tank 2a Upper surface opening part 2b Cleaning tank bottom part 3 Cleaning apparatus 3a Circulating water channel 3b Cleaning pump 3c Cleaning nozzle 3d Circulating water channel port 4 Water supply part 4a Water supply channel 4b Water supply valve 4c Water injection port 5 Door body 6 Tableware basket 7 Drainage part 7a Drainage channel 7b Drainage pump 7c Drainage port 7d Projection part 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 cleaned 14 Heater 15 Temperature sensor 16 Detergent supply device 17 Control part 18 Opening part 19 Engaging part 20 Guide part 71 Case 72 Cleaning tank 72a Front opening part 73 Door Body 74 Support rail 75 Tableware basket 76 Basket rail SK System kitchen

Claims (4)

Formed in a cylindrical shape, a casing, a cleaning tank provided in the casing for containing an object to be cleaned, a water supply section for supplying cleaning water into the cleaning tank, a water reservoir section provided at the bottom of the cleaning tank A residual filter that is detachably fixed to the water reservoir, a cleaning nozzle that injects cleaning water onto an object to be cleaned contained in the cleaning tank, and a circulation channel that connects the water reservoir and the cleaning nozzle. A cleaning pump that is provided in the circulating water channel and feeds the cleaning water in the water reservoir to the cleaning nozzle, a drain channel that connects the water reservoir and the outside of the housing, and a cleaning operation including a cleaning step and a rinsing step. A control unit to execute,
The residue filter captures the residue contained in the washing water flowing into the water reservoir by the operation of the washing pump on the inner surface, and the collected residue when the washing water is discharged out of the housing. Configured to be discharged with the wash water,
The water supply unit includes a water supply channel that allows the supplied cleaning water to flow into an inner region of the residue filter.
dishwasher. A drainage pump provided in the drainage channel for discharging the cleaning water in the cleaning tank to the outside of the casing, and a size that is provided on the upstream side of the residual filter and is large enough to cause a problem when the cleaning water circulates. A pre-filter that captures the residue,
The dishwasher according to claim 1. The water supply path includes a water inlet serving as an outlet to the water reservoir,
The drainage channel includes a drainage port serving as an inlet from the water reservoir,
The water injection port and the drain port are provided in the vicinity of the bottom of the water reservoir below the residue filter,
The dishwasher according to claim 1 or 2. The water injection port and the drain port are provided so as not to face each other while being separated in the circumferential direction,
A guide portion for guiding the wash water flowing from the water injection port toward the inner surface of the residue filter;
The dishwasher according to any one of claims 1 to 3.