JP2023140416A - dishwasher - Google Patents

Abstract

To provide a dishwasher capable of keeping the inside of a washing chamber clean by providing a water storage part that can communicate with the inside of the washing chamber and be separated from it.SOLUTION: A dishwasher includes: a washing tank provided in a housing, which stores an object to be washed; a door body for opening/closing an opening of the washing tank; a water storage part for storing drain water used for washing by opening and closing of a valve; and a drain passage equipped with a drainage pump for discharging the drain water used for washing. The water storage part is provided between the washing tank and the drain passage.SELECTED DRAWING: Figure 9

Description

The present disclosure relates to dishwashers.

Patent Document 1 discloses a dishwasher having a water storage part communicating with a cleaning liquid tank. This dishwasher includes a washing tank that stores tableware, a water storage section provided in the washing tank that stores washing water, a lid that opens and closes an opening of the washing tank, and a washing tank that pressurizes the washing water. a pump, a cleaning means for spraying pressurized cleaning water by the cleaning pump, a detergent liquid tank for storing a highly concentrated detergent solution, a heating means for heating the cleaning water in the water storage section, and an inside of the cleaning liquid tank. and a detergent liquid scattering means for atomizing a highly concentrated detergent liquid and scattering the atomized detergent liquid into the washing tank, and the detergent liquid tank communicates with an upwardly rising wall that separates the detergent liquid from the water storage part. It has a communicating part, and is configured to provide the communicating part on a wall facing the heating means.

JP2006-288776A

The present disclosure provides an easy-to-use dishwasher that includes a water storage part that can be communicated with and separated from the inside of the washing tank and that can maintain the inside of the washing tank in a clean state.

The dishwasher according to the present disclosure includes a housing, a cleaning tank provided in the housing and containing items to be washed, a door body that opens and closes an opening of the cleaning tank, and a water storage system for storing waste water used during cleaning by opening and closing a valve. A dishwasher comprising: a water storage section for cleaning the dishwasher; and a drainage path equipped with a drainage pump for discharging wastewater used during washing, the water storage section being provided between the washing tank and the drainage path.

The dishwasher according to the present disclosure includes a water storage part that can be communicated with and separated from the inside of the washing tank, and the water storage part and the washing tank can be connected and drained by opening and closing a valve. Therefore, the inside of the cleaning tank can be kept clean.

A schematic side view of the dishwasher with the dish basket pulled out from the housing in Embodiment 1. A schematic vertical cross-sectional view of the dishwasher according to the first embodiment when viewed from the front at a position in the front-rear direction. A schematic perspective view of the dishwasher in a state where the dish basket is pulled out from the housing in Embodiment 1 A schematic perspective view of the dishwasher with the door closed in Embodiment 1 A schematic cross-sectional view of the dishwasher according to the first embodiment, showing a cross section taken along the line A-A in the direction of the arrow. FIG. 6 is a schematic cross-sectional view of the dishwasher showing a state in which the area surrounded by the dotted line Y in FIG. Diagram at a certain time FIG. 6 is a schematic cross-sectional view of the dishwasher showing a state in which the area surrounded by the dotted line Y in FIG. Diagram when FIG. 6 is a schematic cross-sectional view of the dishwasher showing an enlarged view of the area surrounded by the dotted line Y in FIG. 5, when the solenoid valve is in the open state and the check valve is in the open state when washing water is being drained. FIG. 6 is a schematic cross-sectional view of the dishwasher showing an enlarged view of the area surrounded by the dotted line Y in FIG. 5, when the solenoid valve is closed and the check valve is closed after the wash water is completely drained. illustration Control flowchart from start to finish of dishwasher operation Control flowchart from water supply to cleaning Flowchart of water flow from water supply to cleaning Control flowchart 1 from start to end of drainage Control flowchart 2 from start to end of drainage Flowchart of water flow from start to finish of drainage Simple explanatory diagram when the check valve is arranged vertically Simple explanatory diagram when the check valve is placed horizontally Schematic perspective view of the vicinity of the downstream drainage route after the drainage pump It is a schematic perspective view of the vicinity of the drainage route downstream after the drainage pump, and is a diagram when the inside of the drainage route is full of water. Schematic perspective view of a pull-open dishwasher

(Findings, etc. that formed the basis of this disclosure)
At the time the inventors came up with the present disclosure, in the conventional cleaning tank configuration, the water storage section where cleaning water is collected and the cleaning tank are always in communication, and the drainage and the smell of the drainage do not enter the inside of the refrigerator. It was flowing backwards. Therefore, the inventors discovered the problem that it is necessary to keep the inside of the refrigerator in a clean state by suppressing the backflow of wastewater and wastewater odor into the refrigerator, and in order to solve this problem, the present disclosure This led to the composition of the theme.

Therefore, the present disclosure provides a dishwasher that can maintain the inside of the washing tank in a clean state by including a water storage part that can communicate with and be separated from the inside of the washing tank.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of well-known matters or redundant explanations of substantially the same configurations may be omitted. This is to avoid making the following description unnecessarily redundant and to facilitate understanding by those skilled in the art.

The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter recited in the claims.

(Embodiment 1)
Embodiment 1 will be described below using FIGS. 1 to 19.

[overall structure]
FIG. 1 shows a dishwasher 1 according to a first embodiment. FIG. 1 is a schematic side view of the dishwasher 1 with the door body 4 in an open state. Specifically, the door body 4 is rotated toward the front to be opened, and the tableware basket 9 is pulled out.

Further, the dishwasher of the first embodiment is a built-in dishwasher installed in, for example, a system kitchen.

In addition, in Embodiment 1, as shown in FIG. 1, FIG. 2, the opening side of the dishwasher 1 will be described as the front side, and the rear wall side as the rear side. Further, in the following description, the top side of the washing tank 3 of the dishwasher is referred to as the upper side, the bottom side is referred to as the lower side, and the right side as viewed from the front of the door body 4 is referred to as the right side, and the left side as the left side.

As shown in FIG. 1, the dishwasher 1 according to the first embodiment includes a casing 2, a washing tank 3 provided inside the casing 2 and accommodating objects to be washed, and an opening located in the front of the washing tank. A door body 4 for opening and closing the section 5 is provided.

The washing tank 3 has an opening 5 on the front side, a drain port 6 for discharging the washing water used during washing, a residue filter 7 for collecting residue, and a tableware basket 9 for storing tableware 8. , cleaning nozzle 10, etc. The opening 5 is closed by a door body 4 provided in the housing 2. Thereby, the tableware basket 9 is supported so that it can be taken in and out of the housing 2 in the front-rear direction (left-right direction on the paper of FIG. 1).

Tableware 8 is placed in the tableware basket 9. The tableware basket 9 is put in and taken out by opening the door body 4 and then pulling it out to the front.

Furthermore, the dishwasher 1 includes a washing pump 11, a water distribution mechanism 12, a water supply section 13, etc. (not shown). The water supply section 13 includes a water supply valve, a water supply hose, etc. (not shown). Specifically, first, cleaning water such as tap water is supplied from a branch faucet or the like on the system kitchen (not shown) to a water supply path such as a water supply hose. The supplied cleaning water passes through a water supply path and is supplied to the cleaning tank 3 at a required water level and in a required amount by a water supply pump, a water supply valve, or the like.

The water supply channel is connected to a water pipe (not shown). The water supply valve is provided in the water supply channel at the rear of the housing 2 . When opened, the water supply valve supplies tap water, which serves as cleaning water, to the cleaning tank 3.

The cleaning pump 11 pumps cleaning water to the cleaning nozzle 10. When there are multiple cleaning nozzles 10, the cleaning water is pumped from the cleaning pump to each cleaning nozzle 10 via the water distribution mechanism 12. The cleaning nozzle 10 sprays cleaning water toward the tableware 8 placed in the tableware basket 9 while rotating due to the reaction force of the pressure-fed cleaning water. That is, the cleaning pump 11 pressurizes the cleaning water stored in the cleaning tank 3 and supplies it to the cleaning nozzle 10 . The washing water jetted from the washing nozzle 10 collides with the tableware to remove dirt and perform washing. Note that the cleaning water includes a cleaning liquid containing a detergent and sprayed onto the object to be cleaned, and rinsing water for rinsing the object to be cleaned. Furthermore, the suction side of the cleaning pump 11 is communicated with the drain port 6, and the cleaning water supplied into the cleaning tank 3 is circulated through a circulation path, and the cleaning water is jetted from the cleaning nozzle 10. The tableware 8 can be washed with the sprayed washing water.

Drain port 6 is provided at the bottom of cleaning tank 3 . The residue filter 7 is detachably installed in the drain port 6 and collects the residue that has been washed and removed from the object to be cleaned. The heater heats the cleaning water stored in the cleaning tank 3 during the cleaning process. The heater is arranged near the bottom of the cleaning tank 3 and heats the drying air in the cleaning tank 3 during the drying process.

The dishwasher of the first embodiment includes a drainage path for draining washing water from the washing tank 3. The drainage path includes a check valve 73, a drainage pump 74, a drainage hose 75, and the like. The dishwasher of the first embodiment also includes a drain port 6, a residue filter 7, a solenoid valve 71, a water storage section 72, and the like between the inner bottom surface of the washing tank 3 and the drain path. When the washing, rinsing, and drying of the tableware 8 is completed, the drain pump 74 is driven, and the washing water passes through the drain port 6 and the residue filter 7, and then passes through the solenoid valve 71 and the water storage section 72, and then is drained. The water reaches the channel and is drained to the outside via the drain hose 75. Further, the drainage path is configured so that the cleaning water in the cleaning tank 3 can be drained to the sink of the system kitchen. The drain hose 75 flexibly connects the discharge port of the drain pump 74 and the drain channel 76. Drain hose 75 is made of a flexible material such as silicone rubber. The drain pump 74 can be driven when it is filled with water.

The dishwasher of Embodiment 1 includes a drying fan that blows air for drying in the step of drying the items to be washed such as tableware 8 . A drying fan is provided near the heater. By driving the heater when driving the drying fan, heated air can be blown onto the object to be cleaned, thereby promoting drying.

As shown in FIGS. 3 and 4, the door body 4 that opens and closes the opening 5 located at the front of the cleaning tank includes a flat portion 42 on the front side surface. The plane part 42 is covered with a surface material or the like, and an operation part 43, a display part 44, etc. are arranged on the top surface of the door body 4. The operation unit 43 is used to set the washing course of the dishwasher, turn on/off the power, etc., by a user's operation. The display unit 44 displays cleaning status, operating status, time, and the like.

The control unit 14 that executes the cleaning operation is provided on the lower right side of the cleaning tank 3 inside the door body 4. The control unit 14 includes a washing process of washing the tableware 8, a rinsing process of washing off the detergent and residue adhering to the tableware 8, and a drying process of drying the tableware 8, and sequentially controls these processes. Furthermore, a pre-washing step and a heating rinsing step may be provided. Further, the control unit 14 controls the cleaning nozzle 10, the cleaning pump 11, the water diversion mechanism 12, the water supply unit 13, the solenoid valve 71, the drain pump 74, etc. in accordance with such a process.

As described above, the dishwasher of Embodiment 1 is configured.

[Dishwasher operation]
The operation and effects of the dishwasher 1 configured as described above will be explained below.

First, the user grasps the handle 41 of the door body 4 and pulls out the washing tank 3 from the dishwasher housing 2. The user sets the items to be cleaned, such as tableware 8, in the tableware basket 9 through the open opening 5 of the cleaning tank 3, and pours in detergent. Thereafter, the tableware basket 9 is pushed into the housing 2, and the door body 4 is closed.

Then, the user sets an operation course using the operation section 43 provided in the control section 14, and starts the cleaning operation by, for example, operating a start button (not shown). Thereby, the control unit 14 executes the cleaning operation based on the driving course. In the dishwasher according to the present embodiment, the control unit 14 sequentially executes a prewashing process, a washing process, a rinsing process, a heating rinsing process, and a drying process.

FIG. 10 shows an example of the operation flow of all these processes performed by the control unit 14 from the start of operation to the end of operation of the dishwasher 1. Further, this flow will be explained below. When operation is started by the user, water is first supplied by the control unit 14 and a pre-washing process is started. In the pre-washing step, the object to be washed is washed using only washing water without using detergent. After this, a drainage operation is basically performed to drain some of the water, and the washing process begins using the remaining water and detergent. When the object to be cleaned is washed in the washing process, at the end of the washing process, the washing water mixed with residue is filtered through a filter 7 and collected once, and a drainage operation is performed to drain all the water. Subsequently, when water is supplied, the object to be cleaned that has been cleaned in the washing process is rinsed, and a rinsing process is performed. At the end of the rinsing process, all the washing water used in the rinsing process is drained. After that, water is supplied again to perform a heating rinsing step, and then the object to be cleaned is rinsed while being heated, thereby performing a heating rinsing step. Drain all water at the end of the heated rinse step. Then, the rinsed object is subjected to a drying process by driving a drying fan and a heater. During the drying process, a drainage operation is also performed to collect water droplets that have fallen from the object to be cleaned. Finally, after all the steps of washing, rinsing, and drying are completed, a drainage operation is performed to collect the remaining water, and the operation of the dishwasher 1 is completed. Note that the operation of draining some water and the operation of draining all water may be replaced or changed as appropriate. For example, only a portion of the washing water used in the rinsing step may be drained, and the remaining washing water may be used to start the heated rinsing step. In this case, water supply before the heated rinsing step is not necessary.

Next, detailed operations of all these steps will be explained.

The control unit 14 first performs a prewashing process without using detergent. The control unit 14 first opens the water supply valve and supplies a predetermined amount of cleaning water to the cleaning tank 3 through the water supply hose. When the water supply is completed, the cleaning pump 11 is driven to forcefully feed the cleaning water, and the cleaning water is directed toward the items to be cleaned from the cleaning nozzle 10 disposed near the bottom of the cleaning tank 3, on the inside surface, on the tableware basket 9, on the top surface, etc. and spray cleaning water. The control unit 14 energizes the heater while jetting the cleaning water to heat the cleaning water. At this time, the control unit 14 detects the temperature of the cleaning water through the bottom wall of the cleaning tank 3 using a temperature sensor, and controls the cleaning water to have a predetermined temperature.

The cleaning water jetted from the cleaning nozzle 10 cleans dirt from the object to be cleaned, passes through the drain port 6 and the residue filter 7, and is sucked into the cleaning pump 11 again. The cleaning pump 11 pumps out the sucked cleaning water, supplies the cleaning water to the cleaning nozzle 10, circulates it, and performs cleaning.

When the pre-washing step is completed, a drainage operation is performed to partially drain the washing water (partial drainage). During the drainage operation, the control unit 14 opens the solenoid valve 71 to connect the drain port 6 and the water storage portion 72, and then controls the drain pump 74 to be driven. Thereafter, the cleaning water containing dirt in the cleaning tank 3 is discharged to the outside of the housing 2 through the drainage hose 75 and the drainage channel 76. When some of the wash water has been drained by a certain amount or for a certain period of time, the control unit 14 controls to stop driving the drain pump 74 and close the electromagnetic valve 71, and ends the draining operation. Note that, according to the specifications, all the water may be drained at this time instead of partially.

Subsequently, the control unit 14 performs a washing process using the remaining washing water and detergent. If only a portion of the washing water has been drained at the end of the pre-washing process, water supply is not necessary in the washing process, so the process proceeds directly to the washing process. However, if all the water is drained in the draining operation after the pre-washing process, the control unit 14 performs the water supply operation before the washing process, and then the control unit 14 performs the washing process. The cleaning operation after driving the cleaning pump is the same as the pre-washing process, so a description thereof will be omitted. The control flow of the control unit 14 from water supply to washing in such a prewashing or washing process is shown in FIG. 11, and the flow of water is shown in FIG. 12.

Subsequently, the control unit 14 executes the washing process for a predetermined period of time (for example, 30 minutes), and then performs a drainage operation to drain all the water (complete drainage). During the drainage operation, the control unit 14 opens the solenoid valve 71 to connect the drain port 6 and the water storage portion 72, and then controls the drain pump 74 to be driven. Thereafter, the cleaning water containing dirt in the cleaning tank 3 is discharged to the outside of the housing 2 through the drainage hose 75 and the drainage channel 76. Once all the waste water has been discharged, the control unit 14 controls the drive of the drain pump 74 to be stopped and the electromagnetic valve 71 to be closed, thereby completing the drain operation. The control flow of the control unit 14 for partial drainage and complete drainage is shown in FIGS. 13 and 14, and the flow of water is shown in FIG. 15. These will be explained in detail later. Note that the flows shown in FIGS. 13 to 15 are the same whether the water is partially drained or completely drained.

Next, the washing step is followed by a rinsing step. The control unit 14 operates the water supply valve to newly supply a predetermined amount of cleaning water to the cleaning tank 3. Similarly to the washing process, the control unit 14 drives the washing pump 11 and injects washing water from the washing nozzle 10. As a result, detergent and residue remaining on the object to be cleaned are washed away with the washing water. At this time, rinsing operations such as discharging the wash water, rinsing, and supplying the wash water are repeated multiple times (for example, 2 to 3 times). At the end of the rinsing process, the control unit 14 performs a drainage operation to discharge the washing water used for rinsing the object to be washed, similarly to the washing process. As described above, the control unit 14 discharges all the waste water while controlling the solenoid valve 71 and the drain pump 74, and completes the drainage operation (complete drainage).

After the rinsing process, after performing the water supply operation again, a heating rinsing process is performed in which the inside of the cleaning tank 3 is heated while performing the rinsing operation. A rinsing operation similar to the rinsing step is performed in the heating rinsing step, and a complete draining operation is performed at the end of the heating rinsing step.

Note that a portion of the washing water used in the rinsing step may be drained, and the heated rinsing step may be performed using the remaining washing water. In this case, the water supply operation before the heating rinsing step is not necessary.

When the rinsing process and the heating rinsing process are completed, the control unit 14 heats the air in the cleaning tank 3 with a heater and blows the air with a fan (not shown). This dries the object to be cleaned. The control unit 14 performs the drainage operation again when performing the drying process for a predetermined period of time (for example, 30 minutes). During the drying process, water droplets adhering to the objects to be cleaned and the inner walls of the cleaning chamber, as well as cleaning water remaining in the cleaning pump 11 and water diversion mechanism 12, drip and accumulate in the drain port 6, making it difficult to drain water. There is a need to do. In addition, in the case of a configuration in which the dehumidifying liquid generated when cooling the steam generated during the drying process is collected in the refrigerator, these are also collected at the drain port 6 as waste water at the same time. Since it takes time for the water droplets to drip and collect near the drain port 6, the drainage operation during the drying process may be performed multiple times in order to completely collect the waste water.

Furthermore, after the drying process, the control unit 14 performs a drainage operation to collect water dripping from the object to be cleaned and collected in the drain port 6, similarly to the drying process, and the cleaning operation is completed. In this way, the drainage operation is performed not only after the washing process and the rinsing process, but also during the drying process and after the cleaning operation is completed. By doing so, when the operation of the dishwasher 1 is finished, almost no waste water remains in the washing tank 3.

As described above, the dishwasher of the first embodiment is controlled. Hereinafter, using the example of the control flow shown in FIG. 10, explanation will be given assuming that the water is partially drained after the pre-washing process and completely drained after the rinsing process.

[Detailed configuration from drain outlet to drainage route]
Next, the configuration from the drain port 6 of the dishwasher to the vicinity of the drain path will be explained with reference to FIGS. 5 to 19.

FIG. 5 is a schematic cross-sectional view of the dishwasher taken along the line AA in FIGS. 3 and 4, taken along the arrow direction. 6 to 9 are schematic cross-sectional views of the dishwasher, showing enlarged views of the lower part of FIG. 5 surrounded by the dotted line Y. FIG. 6 is a diagram when the inside of the cleaning tank is approximately full of water due to washing or rinsing after complete drainage, the solenoid valve is in a closed state, and the check valve is in a closed state. FIG. 7 is a diagram when the inside of the cleaning tank is approximately full of water due to washing or rinsing after being partially drained, the solenoid valve is in a closed state, and the check valve is in a closed state. FIG. 8 is a diagram when the wash water is being drained, the solenoid valve is in the open state, and the check valve is in the open state. FIG. 9 is a diagram after complete drainage, with the solenoid valve in the closed state and the check valve in the closed state.

FIG. 5 shows a cross section of the dishwasher 1 taken along the line AA in FIGS. 3 and 4, taken in the direction of the arrow, and in particular, the portion below the drain port 6 is surrounded by a dotted line Y. FIGS. 6 to 9 are enlarged views of the range of this dotted line Y. When the dishwasher 1 is cut along the A-A line, as shown in FIG. 4, in FIGS. 5 to 9, the right side of the X-axis when viewed from the front is the rear of the dishwasher, and the left side when viewed from the front of the drawing is the dishwasher. It is to the left of This boundary line X is shown by a chain line. Below, each component configuring from the drain port to the drain path will be explained using FIG. 6.

Water flowing from the drain port 6 passes through a solenoid valve 71, a water storage section 72, a check valve 73, a drain pump 74, a drain hose 75, etc., and is discharged to the outside of the machine. The drain port 6 has a concave shape, that is, a bucket shape with a concave portion into which waste water flows, and the bottom surface of the concave portion has a drain port lower space 711, which is a space that extends further downward. The space 711 below the drain port has a bottom surface inclined downward toward the electromagnetic valve 71 located downstream, and serves as a path for carrying waste water to the electromagnetic valve 71 and the water storage section 72 . The space 711 below the drain port has an upstream open end 712 which is open at the top and communicates with the drain port 6, and further has a downstream open end 713 whose side surface is open toward the electromagnetic valve 71. Note that the opening area of the upstream open end 712 of the drain port lower space 711 that communicates with the drain port 6 is smaller than the bottom area of the bottom surface of the concave portion of the drain port 6.

The electromagnetic valve 71 is an on-off valve that enables communication and separation between the cleaning tank 3 and the water storage section 72, and opens and closes the downstream open end 713. In the present disclosure, the electromagnetic valve 71 is a cock-shaped valve that is controlled by the control section 14 and moves in the horizontal direction. This is a solenoid valve. The electromagnetic valve 71 plays the role of damming up water accumulated in the cleaning tank 3, the drain port 6, and the space 711 below the drain port, or discharging it to a water storage section 72 located downstream. When the solenoid valve 71 is opened, the solenoid valve 71 moves backward away from the space 711 below the drain port, and the accumulated water is discharged from the gap between the space 711 below the drain port and the solenoid valve 71. When the solenoid valve 71 is closed, the solenoid valve 71 moves forward and presses against the downstream open end 713 of the space 711 below the drain port, thereby blocking water from flowing downstream from the space 711 below the drain port. Therefore, the cleaning tank 3 and the drain port 6 can be communicated with or separated from the water storage section 72 by opening and closing the solenoid valve 71. With this configuration, the interior of the cleaning tank 3 and the water storage section 72 and the downstream drainage path are separated as necessary, so it is possible to prevent the backflow of waste water and the smell of the waste water.

In addition, the downstream open end 713 and the solenoid valve 71 are provided so as to touch each other on the side near the bottom of the drain port 6, which is the rear side in the figure, so when the solenoid valve 71 is opened, water flows to the side. , the electromagnetic valve 71 and the flowing water are not visible when viewed from the front from directly above the cleaning tank 3 by the user. Therefore, when the water in the space 711 below the drain port has been completely drained, there is no remaining water on the bottom surface visible from inside the cleaning tank 3.
Further, the center point of the solenoid valve 71 in the vertical direction is P. In the drawing of FIG. 6, the vertical position of the center point P is indicated by a dotted line. Hereinafter, the objects will be referred to as upstream and downstream, corresponding to the flow of water.

The water storage portion 72 is a space located directly below the drain port lower space 711 at the bottom of the drain port 6 and can store water. The water storage section 72 is located between the drain port 6, that is, inside the cleaning tank 3, and the drain pump 74, specifically between the upstream electromagnetic valve 71 and the downstream check valve 73, and is located between the drain port 6, that is, the inside of the cleaning tank 3, and the drain pump 74, specifically between the upstream solenoid valve 71 and the downstream check valve 73. It is possible to catch and store the wastewater that has flowed in and the wastewater that has flowed back from the drainage route (return water). The bottom surface of the water storage section 72 is inclined so that the slope becomes lower toward the vicinity of the drainage pump 74 so that water gathers in one place near the drainage pump 74 as much as possible. When the electromagnetic valve 71 is opened, the water moves backward away from the space 711 below the drain port, and the water flowing from the gap between the space 711 below the drain port and the electromagnetic valve 71 flows into the water storage part 72.

Here, if we look at the positional relationship centering on the solenoid valve, the drain 6 is on the upper side and the water storage section 72 is on the lower side, so it is divided into two levels, upper and lower, so it is visible when the user looks into the cleaning tank 3. The area is up to the space 711 below the drain port. A downstream open end 713 of the space 711 below the drain port is provided on a side surface and is closed by a solenoid valve 71. Therefore, the water stored in the water storage part 72 is not visible to the user, and when the water in the space 711 below the drain port has been completely drained, there is no remaining water on the bottom surface visible from inside the cleaning tank 3. has been realized. Furthermore, the water storage section 72 is configured to be detachable, so that it can be removed during maintenance, when a malfunction occurs, or when something is dropped. When removing it, turn the part corresponding to the disk-shaped S frame shown in FIG. 6 and remove it downward.

Moreover, the water storage part 72 is arranged so that the bottom surface of the water storage part 72 is at a position lower than the electromagnetic valve 71. As a result, when the solenoid valve 71 is opened, the wastewater accumulated in the drain port 6 falls to the water storage part 72 due to its own weight, so that the water is automatically drained to the water storage part 72 even without suction from the drainage pump 74. be able to. Further, after the draining operation, the waste water remains in the water storage part 72, and from the user's perspective, there is no water accumulated in the drain port 6, and the water storage part 72 is blocked by the solenoid valve 71 and the check valve 73, and the cleaning tank 3 It is possible to realize a configuration that does not emit odors. On the other hand, if the water storage part 72 is arranged so that the bottom surface of the water storage part 72 is at a higher position than the solenoid valve 71, the space communicating between the cleaning tank 3 and the solenoid valve 71 is the water storage part. Since it is disposed at a position lower than the section 72 in the vertical direction, the waste water and the odor of the waste water flow back into the cleaning tank 3, resulting in a configuration in which the above-mentioned effects cannot be obtained.

The check valve 73 is located between the water storage section 72 and the drainage pump 74, and removes the waste water accumulated in the casing of the drainage pump 74 located further downstream from the water storage section 72 into the water storage section 72 and the cleaning tank 3. This is a valve that prevents water from flowing backwards (return water). Specifically, when draining the cleaning tank 3 with almost no water remaining in the cleaning tank 3 during a drying process, the water filling downstream from the drain pump 74 is prevented from flowing back into the cleaning tank 3. I'm here. The check valve 73 is arranged horizontally upstream of the drain pump 74, and has a configuration that prevents contamination from accumulating. When the valve opening/closing part 731 of the check valve 73 is in an approximately vertical position and closed, the check valve 73 closes the space between the drain pump 74 and the water storage section 72, and the drain water is discharged into the water storage section 72 and the cleaning tank 3. This prevents you from reverting back to When the valve opening/closing portion 731 is in an approximately horizontal position and open, the check valve 73 allows communication between the drainage pump 74 and the water storage section 72, and a path for sucking up the waste water flowing into the water storage section 72 is opened. This check valve 73 is installed so as to be able to rotate in the left-right direction, and is opened and closed by the water flow, and is in an approximately horizontal position and in an open state, especially when water pressure is applied in a direction from upstream to downstream.

Further, let Q be the vertical center point of the check valve 73. In the drawing of FIG. 6, the vertical position of the center point Q is indicated by a dotted line. Further, the water storage section 72 is arranged such that the bottom surface of the water storage section 72 is lower than the check valve 73. As a result, when the drain pump 74 is stationary, the water stored in the water storage section 72 will not flow to the check valve 73 unless the amount of water increases rapidly. Therefore, when the drain pump 74 is stationary, the check valve 73 is prevented from being opened by the water flow from the water storage section 72 side. On the other hand, on the drain pump 74 side, when the drain pump 74 is stationary, water pressure is always applied to the check valve 73 in the upstream direction due to water accumulated between the check valve 73 and the drain pump 74. ing. Therefore, water pressure is applied in a direction opposite to the direction in which the check valve 73 opens, so that the check valve 73 is difficult to open. Therefore, by arranging the bottom surface of the water storage portion 72 at a position lower than the check valve 73, the check valve 73 is configured to prevent the check valve 73 from opening inadvertently when the drain pump 74 is stationary. ing.

Next, the orientation of the check valve will be explained using FIGS. 16 and 17. First, a case where the check valve 73 is arranged vertically, that is, an arrangement where the path of water flowing inside the check valve is in a vertical direction will be described. As shown in FIG. 16, when a foreign object 732 is present above the valve opening/closing part 731 (downstream of the check valve 73 in the drainage path), even if the valve opening/closing part 731 is opened, even if the valve opening/closing part 731 is opened, As shown in the figure, when the valve is opened, there is a valve opening/closing part 731 on the downstream side of the foreign object 732 with respect to the flow of drainage (left side), so the foreign object 732 is blocked by the valve opening/closing part 731 during drainage and remains in the drainage path. It becomes. If this happens, the valve opening/closing portion 731 may become stuck due to foreign matter, causing a problem, or the remaining foreign matter may accumulate, resulting in an unsanitary condition.

On the other hand, as shown in FIG. 17, a case where the check valve 73 is arranged horizontally, that is, an arrangement in which the path of water flowing through the check valve is horizontal will be described. When a foreign object 732 is present on the downstream side of the check valve 73 in the drainage path, the valve opening/closing portion 731 blocks the movement of the foreign object 732 in the direction in which the waste water flows when the valve is opened, as shown in the right view of FIG. Therefore, when the check valve 73 is opened, the foreign matter 732 flows away with the waste water. Therefore, even if the check valve 73 is contaminated with foreign matter, malfunction of the check valve due to the foreign matter can be prevented, and it is sanitary because no contamination is accumulated.

The drain pump 74 is located downstream of the check valve 73, and when driven, sucks up the waste water that has passed from the drain port 6 to the check valve 73. A discharge port 741 of the drain pump 74 is connected approximately vertically upward to a drain hose 75, and the sucked up waste water is sent to the drain hose 75. Note that the drain pump 74 is housed in the casing. Further, the center point in the vertical direction of the rotation axis of the drainage pump 74 is assumed to be R. In the drawing of FIG. 6, the vertical position of the center point R is indicated by a dotted line.

The drain hose 75 further sends the waste water sent from the drain pump 74 to the drain channel 76. The downstream configuration after the drainage hose 75 will be described using FIG. 18. The upstream end of the drainage hose 75 is connected approximately perpendicularly to the discharge port 741 of the drainage pump 74, the hose itself extends straight without bending, and the downstream end of the drainage hose 75 is connected to the drainage channel 76. .

The drain channel 76 is provided outside the cleaning tank 3 and in contact with the side wall inside the housing 2, extends upward from the lower end connected to the drain hose 75, is bent approximately 180 degrees, and extends downward again. The other lower end is connected to the outside discharge hose. A part of the upper end is provided with an atmosphere opening for opening to the atmosphere, and communicates with the inside of the cleaning tank 3. Hereinafter, this atmosphere opening port will be referred to as an air trap 77. When the water sucked up into the drainage channel 76 accumulates up to the bend at the upper end, the air present in the filled water is released from the air trap 77 located further upward from the upper end. Released into the cleaning tank.

On the other hand, the waste water that has passed through the drainage channel 76 is finally sent to an outside discharge hose 78 and is discharged outside the machine. Here, the drainage channel 76 is designed to be longer and higher upward than in the conventional airframe. Normally, due to the water accumulated in the drainage channel 76, water pressure is always applied to the check valve 73 in the upstream direction (backward flow). Therefore, water pressure is applied in the opposite direction to the direction in which the check valve 73 opens, making it difficult for the check valve 73 to open, but as described above, the height of the drainage channel 76 is arranged higher. As a result, the water pressure in the direction of closing the check valve further increases, making the closed state of the check valve more reliable.

Generally, the casing of the drain pump 74 and the washing tank 3 are communicated through an air vent hole, but the dishwasher according to the present disclosure does not require such a configuration. A typical dishwasher does not have a solenoid valve, but has a check valve downstream of the drain pump, so there is always communication between the washing tank and the drain pump. Therefore, after the drainage pump is driven and drainage is completed, air remains in the casing of the drainage pump. If you try to start draining when more than a certain amount of air remains in the casing, the drainage pump will idle, so you will need to remove the air from the casing and draw in water (priming). Therefore, generally, an air vent hole is provided to communicate the inside of the cleaning tank and the inside of the casing, and the air inside the casing escapes from the cleaning tank through the air vent hole. Additionally, water in the cleaning tank flows into the casing.

On the other hand, according to the present disclosure, the solenoid valve 71, the water storage section 72, and the check valve 73 are configured to block the flow of water from the inside of the cleaning tank 3 to the water storage section 72 and the drainage path, and to connect the cleaning tank 3 and the drainage path. can be divided. Specifically, the cleaning tank 3 and the water storage section 72 can be separated, and the water storage section 72 and the drainage path can be separated.

In addition, in the downstream structure after the drainage pump 74, the drainage hose 75 is connected at a position extending directly above (vertically upward) from the discharge port 741 of the drainage pump 74, and the connected hose extends approximately horizontally. It is configured to extend smoothly and continue to a drainage channel 76 and an air trap 77. The drainage hose 75 extends vertically upward from the discharge port 741, and the air in the drainage smoothly floats to the drainage hose 75 without remaining. In addition, since the hose is not bent, air will not accumulate in the space where the hose is bent. Therefore, even if air enters the casing of the drain pump 74, the air rises to the drain hose 75, passes through the drain hose 75, and is finally released from the air trap 77 into the atmosphere. In this way, the structure is such that no air remains inside the casing.

Therefore, in the dishwasher of the present disclosure, it is possible to maintain the state in which the casing of the drain pump 74 is filled with water, and the draining operation is possible at all times, so there is no need to provide an air vent hole that communicates the washing tank and the casing. Instead, the inside of the cleaning tank 3 and the drainage path are separated by a structure such as a solenoid valve 71, a water storage section 72, and a check valve 73. Furthermore, since an air vent hole is not required, the water inside the casing flows back into the cleaning tank when draining due to the air vent hole, causing the user to experience an unpleasant situation where a small amount of water always remains in the cleaning tank even after draining. but never seen. This allows the inside of the cleaning tank to be kept clean after draining without leaving any water behind. In addition, the user also feels clean when looking inside the cleaning tank.

Further, as shown in FIG. 6, the check valve 73 and the drain pump are arranged so that the vertical center point Q of the check valve 73 and the center point R of the rotation axis of the drain pump 74 are approximately at the same position in the vertical direction. A pump 74 is arranged. Thereby, when sucking up waste water downstream, the distribution of water pressure is the same between the check valve 73 and the drain pump 74, so that the waste water can be sucked up efficiently.

Further, the water storage portion 72 is arranged such that the bottom surface of the water storage portion 72 is lower than the electromagnetic valve 71 and lower than the check valve 73. As a result, on the upstream side of the water storage section 72, when the electromagnetic valve 71 is opened, the waste water accumulated in the drain port 6 falls to the water storage section 72 due to its own weight, so the drainage operation is automatically performed and the water is drained to the water storage section 72. can be recovered. On the other hand, on the downstream side of the water storage section 72, the water stored in the water storage section 72 will not flow to the check valve 73 due to the height relationship unless the amount of water increases rapidly. Therefore, the drain water is configured to be stored in the water storage section 72. Therefore, with these configurations, waste water can be stored in the water storage section 72 in a state suitable for the usage situation.

As described above, the area from the drain port of the dishwasher to the area around the drain path is configured.

[Detailed operation of dishwasher]
Next, detailed operations of the dishwasher from washing to draining will be explained using FIGS. 6 to 12. As described in [Operation of Dishwasher], in the pre-washing process and the washing process, the washing water jetted from the washing nozzle 10 cleans the dirt from the object to be washed, and passes through the residue filter 7 and the drain port 6. Then, it is sucked into the cleaning pump 11 again. The cleaning pump 11 pumps the sucked cleaning water, supplies the cleaning water to the cleaning nozzle 10, and circulates the cleaning water to perform cleaning. The control flow up to this point is shown in FIG. 11, and the flow of water is shown in FIG. 12.

Next, after executing the pre-washing process and the washing process for a predetermined period of time, the control unit 14 drives the solenoid valve 71 and the drain pump 74 to drain the cleaning water containing dirt in the cleaning tank 3 from the drain port 6 through the drain channel 76. It is discharged to the outside of the case 2. Figure 13 shows the control flow from the start to the end of drainage at this time.
, 14, and the flow of water is shown in FIG. First, the control flow during the drainage operation will be explained below.

When starting drainage, the control unit 14 first opens the solenoid valve 71 from the state where the cleaning water used for cleaning is stored in the cleaning tank 3. Next, the drain pump 74 is driven. Drainage begins in this way. If the drain pump 74 is driven first here, or if the drain pump 74 and the solenoid valve 71 are operated at the same time, the space from the inside of the cleaning tank 3 to the drain pump 74 will not be exposed to the atmosphere, and the drain pump 74 will run idly. (Air Gami). Therefore, it is necessary to open the solenoid valve 71 before driving the drain pump 74.

When stopping drainage, the control unit 14 needs to stop the drainage pump 74 and close the solenoid valve. If the drain pump 74 is stopped first as shown in the flowchart of FIG. 13, the force that sucks the waste water from the upstream side to the downstream side is first stopped. Therefore, the water filling the drain pump 74, the drain hose 75, and the drain channel 76 flows toward the water storage section 72 located below these in the height direction. The force of the water causes the valve opening/closing portion 731 of the check valve 73 to rotate from the open horizontal position to the closed vertical position, thereby closing the check valve. Thereafter, when the electromagnetic valve 71 is closed, the cleaning tank 3 and the drain port are separated from the water storage section 72 and the subsequent components. In this way, a state is achieved in which the user can visually see that no cleaning water remains in the cleaning tank 3, and the waste water and the odor of the waste water do not flow back into the cleaning tank 3.

If the solenoid valve 71 is closed first or the drain pump 74 is stopped at the same time as the solenoid valve 71 is closed, the movement of water from the water storage section 72 to the drain pump 74 will stop, making it difficult for the check valve 73 to close. There is a possibility that it will happen. Therefore, depending on the specifications of the opening/closing portion of the check valve 73, it is necessary to first stop the drain pump 74 to reliably close the check valve 73. Furthermore, if the solenoid valve 71 is closed first, the upstream side of the drain pump 74 becomes a space that is not exposed to the atmosphere. After this, the drainage pump 74 is stopped, so that the drainage pump 74, the drainage hose 75, and the drainage channel 76 are filled with drainage water. After that, when the solenoid valve 71 is opened for drainage operation at the end of the drying process or cleaning operation, the filled wastewater flows toward the water storage section 72, so there is a possibility that the wastewater will flow back into the drain port 6. be.

On the other hand, if the solenoid valve 71 is closed first as shown in FIG. 14, and the drain pump 74 is subsequently stopped, even if water flows backward from the drain pump 74, the drain hose 75, or the drain channel 76, the solenoid valve Since the interior of the cleaning tank 3 and the water storage section 72 are already separated by the 71, it is possible to prevent the waste water that has flowed back into the water storage section 72 from flowing back into the cleaning tank 3. The order of these controls is determined according to the amount of water flowing backward from the downstream side of the drain pump 74, and the arrangement and opening/closing specifications of the check valve 73. The design should be such that the two can be separated.

Next, the flow of water after the drain pump 74 is driven after the washing process has been executed for a predetermined period of time will be described with reference to FIGS. 15, 19, and 6 to 9. 6 to 9 are enlarged cross-sectional views of the lower part of the drain 6 in FIG. , Figure 9 shows the water level after complete drainage. Further, FIG. 19 shows a state in which the drainage path downstream of the drainage pump 74 is full of water when water is sent from the drainage pump 74 to the drainage hose 75 and thereafter. In these figures, areas filled with water are shown in a translucent gray color. The movement of water is also represented by white arrows.

First, when the water is full, such as during cleaning, the cleaning tank 3, the drain port 6, and the space 711 below the drain port are filled with cleaning water, and the solenoid valve 71 is in a closed state. Here, if the cleaning water has been completely drained in the operating operation before the cleaning water is stored in the cleaning tank 3, the drain pump will have sucked air once during the complete draining operation, so the gap between the solenoid valve 71 and the check valve 73 will be is no longer in a vacuum state, and the water that had passed between the water storage section 72 and the check valve 73 during drainage is stopped being sucked up and falls into the water storage section 72 and is stored therein. Therefore, the water level in the water storage section 72 is at a slightly higher position due to the amount of water that has fallen during drainage (FIG. 6).

If some of the water has been drained during the operation before the washing water is stored in the washing tank 3, the drain pump 74 has been stopped while sucking the waste water, so that the water is removed between the solenoid valve 71 and the check valve 73. is filled with water and is in a vacuum state, so the water that has passed between the water storage section 72 and the check valve 73 during drainage stops at the same position. Therefore, the water level in the water storage section 72 is the same as during drainage, and is at a lower position than in FIG. 6 (FIG. 7). Drainage starts when the water level near the drainage path is in the state shown in FIG. 6 or 7. However, in either state of FIG. 6 or FIG. 7, the space between the check valve 73 and the drain pump 74 is filled with water.

When the drainage operation is started, the solenoid valve 71 is first opened, and as the cleaning water falls through the gap between the solenoid valve 71 and the solenoid valve 71 as shown by the arrow in FIG. 8, the cleaning water flows into the water storage section 72. Subsequently, when the drainage pump 74 is driven, the drainage water is sucked downstream, so that the drainage water accumulated in the water storage section 72 moves toward the check valve 73. This water flow pushes the check valve 73 downstream and opens it. The wastewater sucked into the drain pump 74 passes through the discharge port 741 of the drain pump 74 and is sent to the drain hose 75.

Next, moving to FIG. 19, the drainage from the drain hose 75 is sent to a drainage channel 76, and when the drainage channel 76 is filled with water, the water reaches near the air trap 77 located above, and from the air trap 77 it flows out. While the sucked air is being released, the waste water itself finally flows through a route different from that of the air to the outside discharge hose 78 connected below the drainage channel 76, and is discharged outside the machine.

When the drainage operation in the cleaning tank 3 is stopped or completed, the control unit 14 stops driving the drainage pump 74 and closes the solenoid valve 71. At this time, the check valve 73 is also closed as described above, and a state in which the cleaning tank 3 and the drainage path, specifically, the water storage portion 72 and the drainage path are separated, is completed as shown in FIG. 7 or 9. If the drainage operation at this time is complete drainage and the drainage is completed, all of the washing water from the drain port 6 has been drained, so the drainage is stored only downstream from the water storage section 72, and the drainage is completed. The water level from the port 6 to the drain pump 74 is as shown in FIG. On the other hand, if the drainage operation is partially stopped during drainage, the cleaning tank 3 will still be filled with a certain amount of cleaning water, so water will also fill up after the drain port 6. , the water level of the cleaning water returns to the state shown in FIG. 7 again.

Moreover, since the electromagnetic valve 71 and the check valve 73 are in a closed state when draining is completed as shown in FIG. 9, the flow of water will not move until the next washing step. Therefore, when the next washing process is started from the state shown in FIG. 9, the draining operation is started after washing water is supplied into the washing tank 3, and so on. , Figure 6... The flow of wastewater is represented by the cycle. On the other hand, if some drainage is done in the middle, the flow of drainage is shown in the cycle of Figure 6, Figure 8, Figure 7 (partial drainage), Figure 8, Figure 9 (complete drainage), etc. . The flow of water during this draining operation is approximately the same regardless of the timing of the draining operation, including the pre-washing process, washing process, rinsing process, heating rinsing process, drying process, and at the end of the drying process.

As described above, the draining operation of the dishwasher is performed.

[About the control section of the dishwasher]
The control unit 14 is realized by hardware such as a microcomputer, a microcontroller, and an integrated circuit.

The control unit 14 includes a process control unit, a detection result acquisition unit, a notification unit, a memory, and the like. These configurations are realized in hardware by the CPU, memory, and other LSI of any computer, and in software by programs loaded into memory, but here we will discuss their cooperation. It depicts the functional blocks realized by Therefore, those skilled in the art will understand that these functional blocks can be implemented in various ways, such as only hardware or a combination of hardware and software.

The process control unit controls the washing operation of the dishwasher 1. The process control section receives instructions from the user from the operation section of the dishwasher, and controls the washing operation according to the instructions. The process control unit may execute the pre-washing process, the washing process, the rinsing process, the heating rinsing process, and the drying process continuously, may execute only any one of the processes, or may execute two or more of the steps. The combination of steps may be performed in any order.

(Other embodiments)
As mentioned above, Embodiment 1 has been described as an example of the technology disclosed in this application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments in which changes, replacements, additions, omissions, etc. are made. Furthermore, it is also possible to create a new embodiment by combining the components described in the first embodiment.

Therefore, other embodiments will be illustrated below.

In the first embodiment, the solenoid valve 71, which is an on-off valve controlled by the control section, has been described as an example of the on-off means. However, in reality, the opening/closing means may be of any type as long as it can open and close between the cleaning tank 3 and the water storage section 72 during draining. Therefore, the opening/closing means is not limited to the opening/closing valve or the solenoid valve 71. However, as long as the means can be driven manually or during the drainage operation, a valve or lid that moves or rotates not in the front-back direction but in the left-right direction or up-down direction, a double-opening structure, etc. may be used.

In Embodiment 1, the check valve 73 has been described as an example in which the check valve 73 is rotated between a horizontal position and a vertical position by a water flow. However, similar to the electromagnetic valve 71, the means for realizing the check valve is not limited to this example as long as it can be driven manually or during a drainage operation.

In the first embodiment, the water storage section 72 has been described as an example of water storage means. However, in reality, the water storage means may be of any type that can be separated from the cleaning tank 3 when the solenoid valve 71 is closed, and therefore is not limited to the arrangement of this embodiment. Further, the bottom surface of the water storage section 72 is inclined so that the slope becomes lower toward the vicinity of the drainage pump 74, but the shape is not limited to this. The bottom surface may be horizontal, or other measures may be taken, such as providing a water channel guide so that drainage water collects near the drainage pump 74.

In the first embodiment, as an example, the drain hose 75 has been described as having a shape extending in the horizontal direction, but it may extend upward from the horizontal direction as long as it is at an angle that allows the drain pump to pump up water. By doing so, the air within the drain hose 75 is more easily transferred to the air trap 77.

In the first embodiment, a dishwasher that performs a prewashing process and a heating rinsing process is used as an example of the operation operation, but the dishwasher is not limited to this example. For example, it may be a dishwasher that performs only a washing process and a rinsing process, or the processes may be set as necessary.

In the first embodiment, it has been explained that, as a control flow for all steps of the operation, partial drainage is performed during the pre-washing process, and complete drainage is performed during the heated rinsing process. However, from the viewpoint of water conservation, energy conservation, and environmental considerations, changes may be made such as increasing the number of partial drains in the process, or the number of complete drains may be changed to strengthen cleaning power depending on the dirt situation. good.

Further, in the dishwasher of the first embodiment, the door body 4 is of a pull-down type and the tableware basket 9 is of a pull-out type, but the structure is not limited to this. For example, a pull-out type dishwasher as shown in FIG. 20 can also be applied. Further, in FIG. 20, a cleaning tank 16 is configured inside the casing 15. The door body 17 is supported by a support rail 18 and slides back and forth to open and close the front opening 19 of the cleaning tank 16. The tableware basket 20 is supported by a basket rail 21, is locked to the door body 17, and slides back and forth. Of course, the present embodiment may be applied to a desktop type dishwasher instead of a built-in type.

[Effects etc. of Embodiment 1]
According to the dishwasher according to the first embodiment, the following effects can be achieved.

Dishwasher 1 according to Embodiment 1 of the present disclosure includes a casing 2, a washing tank 3 provided in the casing 2 and accommodating objects to be washed, and a door body 4 that opens and closes an opening of the washing tank 3. , a water storage section 72 that stores drainage water used during cleaning by opening and closing a valve, and a drainage path equipped with a drainage pump 74 that drains drainage water used during cleaning, and the water storage section 72 is connected to the cleaning tank 3 and the drainage path. established between.

With such a configuration, when the valve is provided on the downstream side of the water storage section 72, it is possible to receive the drainage water (return water) flowing backward from the downstream side of the drainage path and store it in the water storage section 72. Furthermore, since the amount of return water from the drainage path flowing into the water storage section 72 can be restricted, the water level in the water storage section 72 will not become high, and the backflow of waste water into the drain port 6 can be suppressed. Furthermore, since the space between the valve and the vicinity of the drain pump 74 can be filled with water, the drain pump 74 can be driven without priming. Further, with such a configuration, when the valve is provided upstream of the water storage section 72, it is possible to prevent backflow of waste water and waste water odor coming up from the drainage path downstream from the water storage section 72. Further, when the water in the drain port 6 is completely drained, a configuration can be realized in which the user cannot see the water stored in the water storage section 72 due to the valve.

In the dishwasher 1 according to the first embodiment of the present disclosure, the washing tank 3 and the water storage section 72 are communicated with each other by opening the solenoid valve 71, and the drainage path is separated from the inside of the washing tank 3 by closing the solenoid valve 71. It is possible.

With such a configuration, the inside of the cleaning tank 3 and the drainage path after the water storage section 72 are separated as necessary, so that when the drainage is completed, the drainage water and the odor of the drainage are prevented from flowing back into the cleaning tank 3. be able to.

In the dishwasher 1 according to the first embodiment of the present disclosure, the check valve 73 prevents the backflow of wastewater from the drainage path to the water storage section 72, and the check valve 73 is located upstream of the drain pump 74 with respect to the flow of the wastewater. It is located in

With this configuration, it is possible to prevent the waste water accumulated in the casing of the drain pump 74 from flowing back into the water storage section 72 and the cleaning tank 3.

The dishwasher 1 according to the first embodiment of the present disclosure further includes a control unit 14 that sequentially controls a washing process, a rinsing process, and a drying process, and the control unit 14 controls the washing process, the rinsing process, and the drying process. When ending the draining operation in any one of the above, the drain pump 74 is first stopped, and then the opening/closing means is closed.

With this configuration, the water filling the drainage channel 76 flows toward the water storage portion, and the force of the water reliably closes the check valve 73. Therefore, the drainage path after the drainage pump 74 and the water storage section 72 can be separated.

In the dishwasher 1 according to Embodiment 1 of the present disclosure, the water storage portion 72 is arranged such that the bottom surface of the water storage portion 72 is at a position lower than the valve.

With this configuration, on the upstream side of the water storage section 72, when the electromagnetic valve 71 is opened, the waste water accumulated in the drain port 6 falls into the water storage section 72 due to its own weight, so that the drainage operation is automatically performed and the water storage section The waste water can be collected at 72. On the other hand, on the downstream side of the water storage section 72, the water stored in the water storage section 72 will not flow to the check valve 73 due to the height, unless the amount of water increases rapidly, so the waste water is stored in the water storage section 72. .

Although the invention has been fully described with reference to preferred embodiments and with reference to the accompanying drawings, various variations and modifications will become apparent to those skilled in the art. It is to be understood that such variations and modifications are included insofar as they do not depart from the scope of the invention according to the appended claims.

Note that the above-described embodiments are for illustrating the technology of the present disclosure, and therefore various changes, substitutions, additions, omissions, etc. can be made within the scope of the claims or equivalents thereof.

The present disclosure is applicable to cleaning devices that can use detergents. Specifically, the present disclosure is applicable to dishwashers and the like.

1 Dishwasher 2 Housing 3 Washing tank 4 Door body 5 Opening 6 Drain port 7 Residue filter 8 Tableware 9 Dish basket 10 Washing nozzle 11 Washing pump 12 Water diversion mechanism (not shown)
13 Water supply section (not shown)
14 Control part 41 Handle 42 Flat part 43 Operation part 44 Display part 70 Residue filter 71 Solenoid valve 72 Water storage part 73 Check valve 74 Drain pump 75 Drain hose 76 Drain channel 77 Air trap 78 External discharge hose 711 Space below the drain port 712 Upstream open end 713 Downstream open end 731 Valve opening/closing part 732 Foreign object 741 Drain pump discharge port

Claims (5)

A casing and
a cleaning tank provided in the housing and accommodating an object to be cleaned;
a door body that opens and closes the opening of the cleaning tank;
a water storage section that stores wastewater used during cleaning by opening and closing a valve;
A drainage path equipped with a drainage pump to drain wastewater used during cleaning;
Equipped with
In the dishwasher, the water storage section is provided between the washing tank and the drainage path. the valve is a solenoid valve;
The cleaning tank and the water storage section are communicated with each other by opening a solenoid valve, and the drainage path can be separated from the interior of the cleaning tank by closing the solenoid valve.
A dishwasher according to claim 1. the valve is a check valve;
The check valve prevents backflow of wastewater from the drainage path to the water storage part,
The dishwasher according to claim 1 or 2, wherein the check valve is arranged upstream of the drainage pump with respect to the flow of drainage. The dishwasher further includes a control unit that sequentially controls a washing process, a rinsing process, and a drying process,
Claims 1 to 3, wherein the control unit first stops the drainage pump and then closes the solenoid valve when ending the drainage operation in any one of the washing step, the rinsing step, and the drying step. The dishwasher according to any one of the above. The dishwasher according to any one of claims 1 to 4, wherein the water storage section is arranged such that a bottom surface of the water storage section is located at a position lower than the valve.