阅读说明：本技术 餐具清洗机 (Tableware cleaning machine ) 是由 楠健吾 新海清恭 富山佳祐 田中启之 于 2021-10-13 设计创作，主要内容包括：本发明涉及餐具清洗机。通过简单的结构,能够更可靠地清洗残渣过滤器,抑制残渣在残渣过滤器的残留。被构成为用残渣过滤器捕获在被喷射至被清洗物后流入储水部的清洗水中包含的残渣,同时清洗水经由排水路径被排出至壳体外时,捕获的残渣与清洗水一起被排出,在储水部具备清洗残渣过滤器的注水部,残渣过滤器具有引导来自注水部的注水的引导部,通过使来自注水部的注水抵接于引导部来清洗残渣过滤器。(The present invention relates to a dishwasher. With a simple configuration, the residue filter can be cleaned more reliably, and residue remaining on the residue filter can be suppressed. The residual filter is configured to capture residues contained in washing water injected to an object to be washed and flowing into the water storage part by the residual filter, and when the washing water is discharged to the outside of the casing through the water discharge path, the captured residues are discharged together with the washing water.)

1. A dishwasher, comprising:

a shell body, a plurality of first connecting rods and a plurality of second connecting rods,

a cleaning tank arranged in the housing and accommodating the object to be cleaned,

a water storage part arranged at the bottom of the cleaning tank,

a residue filter provided in the water storage part,

a washing nozzle for spraying washing water to the object to be washed, an

A drain path communicating the water storage part and the outside of the case;

the dish washing machine is configured to: capturing residues contained in the washing water injected to the object to be washed and flowing into the water storage part by the residue filter, and discharging the captured residues together with the washing water when the washing water is discharged out of the housing through the drain path,

the water storage part is provided with a water injection part for cleaning the residue filter,

the residue filter has a guide part for guiding the water injected from the water injection part,

the residue filter is cleaned by flushing the water injected from the water injection part to the guide part.

2. The dishwasher of claim 1, wherein,

the guide portion is formed of a wall surface protruding along a rear surface of the residue filter, and is configured to be supplied with water from the water supply portion along a lower portion of the wall surface.

3. The dishwasher of claim 1, wherein,

the guide portion is formed of an annular path along the back surface of the residue filter, and has a plurality of discharge ports on the lower surface thereof, and is configured to supply water from the water supply portion to the path and the discharge ports.

4. The dishwasher according to any one of claims 1 to 3, wherein,

a water supply part for supplying water from the outside to the water injection part,

as a water supply source for supplying water to the water supply portion, water supply from outside the dish washing machine is used.

5. A dishwasher according to any one of claims 1 to 3, further comprising:

a circulation water path communicating the water storage part with the washing nozzle, an

A washing pump disposed in the circulation water path and configured to transfer the washing water in the water storage unit to the washing nozzle;

as a water supply source for supplying water to the water supply portion, water supplied from the circulation water path is used.

6. The dishwasher of claim 5, wherein,

after a drain pump for discharging the washing water through the drain path is driven, the washing water is injected from the circulation water path to the water injection portion by the washing pump.

7. The dishwasher of claim 6, wherein,

stopping the wash pump before stopping the drain pump.

8. The dishwasher according to any one of claims 5 to 7, wherein,

the water injection unit is disposed at a position not near a suction port for sucking the washing water in the water storage unit into the washing pump.

Technical Field

The present invention relates to a dishwasher for washing objects to be washed, such as dishes, contained in a washing tub.

Background

The conventional dish washing machine is provided with a washing tub for accommodating dishes in a main body. The bottom of the cleaning tank is provided with a cleaning pump which sucks water from the bottom and sprays the water into the cleaning tank. The drain pump sucks water from the bottom of the washing tank and discharges the water to the outside of the machine through the drain passage. The residue filter is composed of a residue basket, a metal plate and a metal mesh part. The residue basket captures large food residues when the drain is cleaned. The metal plate has an inclined portion and a water removal hole for allowing the residue to flow to the residue basket. The metal mesh portion prevents debris from entering the purge pump. A water injection pipe as a water injection means is provided at the outer periphery of the metal mesh part, and injects water from the outside to the inside to remove residues adhering to the metal mesh part.

When the operation of the dishwasher is started, water is supplied and accumulated in the bottom of the washing tub. The accumulated water is sprayed into the washing tank by the washing pump to wash the dishes. After the washing is completed, the drain pump operates to drain the water in the washing tub to the outside of the machine through the drain passage. When the operation of the drain pump is stopped, the residue is removed to the inside by spraying from the outside of the metal mesh part through a water injection pipe located at the outer periphery of the metal mesh part of the residue filter. When the water supply is completed, the drain pump is operated again, and the accumulated water is sucked from the bottom of the washing tub by the drain pump and discharged to the outside of the machine through the drain passage.

According to the above configuration, the fine food waste attached to the waste filter is washed to the inside of the metal mesh part. Therefore, after the washing is finished, the food residue odor does not remain in the dish washing machine, and the odor does not transfer to the dishes.

[ Prior art documents ]

[ patent document ]

Patent document 1: japanese laid-open patent publication No. H04-224725

Disclosure of Invention

The conventional dish washing machine sprays water from the outside to a mesh part constituting a residue filter to remove residues adhering to the mesh part. However, in order to spray water from the outside to the entire mesh portion, it is necessary to provide a considerable number of spray ports around the mesh portion, or to configure the spray ports to move around. Thus, there is a problem that the configuration of the injection means is complicated.

Further, there is a problem that, when the wire rod constituting the mesh portion is thick, or when the mesh is formed of a metal plate having a plurality of small holes instead of the wire rod, the residue existing inside the wire rod or the plate material cannot be peeled off even if water is sprayed from the outside.

The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a dishwasher in which substantially the entire inner surface of a residue filter is directly cleaned by injecting water to permeate the inner surface of the residue filter, thereby suppressing residue from remaining on the inner surface of the residue filter.

[ means for solving the problems ]

In order to achieve the above object, a dishwasher according to the present invention includes: a housing; a cleaning tank which is provided in the housing and accommodates an object to be cleaned; a water storage part arranged at the bottom of the cleaning tank; a residue filter provided in the water storage unit; a washing nozzle for spraying washing water to the object to be washed; and a drainage path communicating the water storage part and the outside of the housing; the dishwasher is configured to capture residues contained in washing water injected to the object to be washed and flowing into the water storage part by the residue filter, and to discharge the captured residues together with the washing water when the washing water is discharged to the outside of the housing through the water discharge path, and further includes a water injection part for cleaning the residue filter in the water storage part, wherein the residue filter has a guide part for guiding water injection from the water injection part, and the dishwasher includes a structure for cleaning the residue filter by bringing water injection from the water injection part into contact with the guide part.

According to this configuration, even if the residue captured by the residue filter in the cleaning step adheres to the residue filter and remains, water is injected in the subsequent flushing operation or the like to flush the remaining residue. Thus, the residue filter can be cleaned more reliably with a simple configuration than in the conventional technique in which the residue filter is washed from the outside, and residue remaining in the residue filter can be suppressed.

[ Effect of the invention ]

The invention provides a dish washing machine, which can more reliably wash the inner side surface of a residue filter with a simple structure and can inhibit residue from remaining on the residue filter.

Drawings

Fig. 1 is a schematic side sectional view of a dishwasher according to embodiment 1 of the present invention.

Fig. 2 is a side sectional view showing a flow of water to the residue filter in the dishwasher according to embodiment 1 of the present invention.

Fig. 3 is a sectional view a-a showing a flow of water injected into the residue filter in the dishwasher according to embodiment 1 of the present invention.

Fig. 4 is a bottom view of the dish washing machine according to embodiment 1 of the present invention, as viewed from below, illustrating the flow of water to the residue filter.

Fig. 5 is a side sectional view showing a flow of water to the residue filter in the dishwasher according to embodiment 2 of the present invention.

Fig. 6 is a B-B sectional view showing a flow of water filling to the residue filter in the dishwasher according to embodiment 2 of the present invention.

Fig. 7 is a schematic side sectional view of a dishwasher according to embodiment 3 of the present invention.

Fig. 8A is a diagram showing the structure of the water knockout vessel.

Fig. 8B is a diagram showing the structure of the water separator.

Fig. 9A is a diagram showing a state in which debris is captured by the debris filter.

Fig. 9B is a diagram showing a state in which debris is captured by the debris filter.

Fig. 9C is a diagram showing a state in which debris is captured by the debris filter.

Fig. 10A is a diagram showing a relationship between the water filling port and the circulating water path suction port.

Fig. 10B is a diagram showing a relationship between the water filling port and the circulating water path suction port.

Fig. 10C is a diagram showing the relationship between the water filling port and the circulating water path suction port.

Fig. 11 is a view showing the angle of the washing water ejected from the ejection port.

Fig. 12 is a flowchart showing a method of controlling the dish washing machine according to embodiment 3.

Fig. 13 is a timing chart showing the state of each configuration of the dish washing machine according to embodiment 3.

Detailed Description

The dishwasher of the first invention includes: a housing; a cleaning tank which is arranged in the shell and accommodates the cleaned object; a water storage part arranged at the bottom of the cleaning tank; a residue filter provided in the water storage unit; a washing nozzle for spraying washing water to the object to be washed; and a drainage path communicating the water storage part and the outside of the housing; the dish washing machine is configured to: capturing residues contained in the washing water injected to the object to be washed and flowing into the water storage part by the residue filter, and discharging the captured residues together with the washing water when the washing water is discharged to the outside of the case through the drain path; the residual filter is provided with a guide part for guiding the water injected from the water injection part, and the residual filter comprises a structure for washing the residual filter by making the water injected from the water injection part flush with the guide part.

With this configuration, even if the residue captured by the residue filter adheres to the residue filter and remains during the cleaning operation, the water injection operation can be performed to flush the remaining residue. Compared with the prior art of injecting water from the outside of the mesh part of the filter, the residue filter can be cleaned by a simple structure, and residue on the residue filter can be restrained.

The second invention is configured to: in particular, in the first aspect of the invention, the guide portion is formed by a wall surface protruding along the back surface of the residue filter, and water is injected from the water injection portion along a lower portion of the wall surface.

With this configuration, a swirling flow is generated along the mesh part of the residue filter during the water injection operation, and the inner surface of the residue filter is cleaned substantially over the entire area, thereby suppressing residue from remaining on the inner surface of the residue filter. Further, the water discharge operation is performed in cooperation with the water injection operation, and the residue can be effectively discharged.

The third invention is configured to: in particular, in the first aspect of the invention, the guide portion is formed of an annular path along the back surface of the residue filter, and a plurality of discharge ports are provided on the lower surface of the path, and water is injected from the water injection portion to the path and the discharge ports.

With this configuration, during the water injection operation, a water flow is generated inside the mesh part of the residue filter, or a substantially vertical water flow is generated along the inside of the mesh part, so that substantially the entire inner surface of the residue filter is cleaned, and residue can be prevented from remaining on the inner surface of the residue filter. Further, by performing the water discharge operation in cooperation with the water injection operation, the residue can be effectively discharged.

The fourth invention is configured to: in particular, in any one of the first to third inventions, a water supply unit for supplying water from the outside to the water injection unit is provided, and water supply from the outside of the dishwasher is used as a water injection source for injecting water into the water injection unit.

With this configuration, even if the residue captured by the residue filter adheres to and remains on the inner surface of the residue filter in the cleaning step, the residue is suppressed from remaining on the residue filter by cleaning substantially the entire inner surface of the residue filter by the water supply operation in the subsequent washing step or the like.

The fifth invention is configured to: specifically, in any one of the first to third inventions, it includes: a circulation water path for communicating the water storage part and the cleaning nozzle, and a cleaning pump arranged in the circulation water path for conveying the cleaning water in the water storage part to the cleaning nozzle; as a water supply source for supplying water to the water supply portion, water supplied from the circulation water path is used.

With this configuration, even if the residue captured by the residue filter in the cleaning step adheres to the inner surface of the residue filter and remains, the residue filter can be cleaned without using excessive cleaning water by using the cleaning water supplied to the cleaning tank in the cleaning step or the cleaning water supplied to the cleaning tank for the subsequent rinsing step or the like, and the residue can be prevented from remaining on the residue filter.

The sixth invention is configured such that: in particular, in the fifth aspect of the invention, after the drain pump for draining the washing water through the drain path is driven, the washing water is injected from the circulation water path to the water injection portion by the washing pump.

With this configuration, the residue adhering to the residue filter can be discharged to the outside quickly and efficiently, and therefore the residue can be prevented from remaining on the residue filter.

The seventh invention is configured such that: in particular, in the sixth invention, the purge pump is stopped before the drain pump is stopped.

With this configuration, the residue attached to the residue filter can be more reliably discharged to the outside, and the residue can be suppressed from remaining on the residue filter.

The eighth invention is configured such that: in particular, in any one of the fifth to seventh inventions, the water injection part is disposed at a position other than the vicinity of the suction port for sucking the washing water in the water storage part into the suction port of the washing pump.

According to this configuration, even when the residue is accumulated in the residue filter, the washing water containing the residue can be prevented from being sucked into the washing pump from the outside of the residue filter through the water injection unit, and the residue can be efficiently captured by the residue filter.

Embodiments of the present invention will be described below with reference to the drawings. In addition, the present invention is not limited by this embodiment.

(embodiment mode 1)

Fig. 1 is a schematic side sectional view of a dishwasher according to embodiment 1 of the present invention. Fig. 1 shows a state in which the dishwasher is installed in an integrated kitchen SK. In the description of the respective embodiments, as shown in the drawings, the front direction is defined as a direction in which door body 5 and cleaning tank 2 are pulled out, and the rear direction is defined as a direction in which cleaning tank 2 is housed and door body 5 is closed. The explanation will be given with the installation side of the dishwasher set to the lower side and the opposite side set to the upper side, and with the right side set to the right and the left side set to the left, facing the front of the door body 5.

As shown in fig. 1, the dish washing machine of the present embodiment includes a casing 1, a washing tub 2, a washing device 3, a water supply unit 4, a door 5, a drain unit 7, and the like.

The housing 1 has a front surface opening portion on the front surface. Washing tub 2 includes dish basket 6, washing nozzle 3c, water storage unit 8, residue filter 9, and the like. The cleaning tank 2 is provided so as to be movable in the front-rear direction inside the casing 1. Cleaning tank 2 has an upper surface opening 2a on the upper surface. When cleaning tub 2 is housed in casing 1, upper surface opening 2a is closed by inner lid 10 provided in casing 1. The inner lid 10 moves up and down through a link mechanism 11 in conjunction with the movement of the washing tub 2. A seal portion 12 formed of a deformable hollow rubber tube is provided at the periphery of the upper surface opening 2 a. Sealing section 12 is compressed by inner lid 10 which is lowered when cleaning tank 2 is housed in casing 1, and seals upper surface opening 2 a.

The dish basket 6 is loaded with objects to be washed 13 such as dishes. Door 5 is provided at the front of washing tub 2, and covers the front surface of casing 1 when stored. The water supply unit 4 includes a water supply passage 4a, a water supply valve 4b, and the like. The water supply passage 4a is connected to a water pipe not shown. The water supply valve 4b is provided in the water supply passage 4a at the rear portion inside the housing 1. Water supply valve 4b is opened to branch tap water as cleaning water so that tap water can be supplied to at least either one of cleaning tank 2 or residue filter 9 in water storage unit 8, and water can be supplied to either one or both of cleaning tank 2 and water storage unit 8 by switching the opening of water supply valve 4 b. The water supply valve 4b may be constituted by a water supply pump.

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

The cleaning nozzle 3c is provided at the cleaning tank bottom 2 b. The washing pump 3b pressurizes and conveys the washing water to the washing nozzle 3 c. The washing nozzle 3c is rotated by the reaction force of the pressurized washing water and sprays the washing water to the object to be washed 13. That is, wash pump 3b pressurizes wash water stored in wash tub 2 and supplies the pressurized wash water to wash nozzle 3 c. The washing water ejected from the washing nozzle 3c collides with the object to be washed 13 to remove stains, and washing is performed. Further, the washing water includes a washing liquid containing a detergent, which is sprayed toward the object to be washed 13, and washing water for washing the object to be washed 13.

The water storage section 8 is provided in the cleaning tank bottom section 2b in the cleaning tank 2. The residue filter 9 is detachably provided in the water storage unit 8, and captures residues cleaned and removed from the object to be cleaned 13. The water storage unit 8 and the residue filter 9 will be described in detail later. The residue filter 9 may be fixed to the water storage unit 8 and may not be detachable. A heater (not shown) is provided at washing tub bottom 2b, and heats the washing water stored in washing tub 2 in the washing step or rinsing step. The heater heats the drying air in the cleaning tank 2 in the drying step. A temperature sensor (not shown) is disposed outside the washing tub bottom 2b and detects the temperature of the washing tub 2. A detergent supply device (not shown) for supplying detergent into washing tub 2 is provided on a side surface of washing tub 2 facing door 5.

The drain unit 7 drains the washing water flowing into the water storage unit 8 out of the casing 1. The drain portion 7 includes a drain passage 7a, a drain pump 7b, a drain port 7c, and the like. The drain pump 7b may be configured to be able to be used as a drain pump instead by reversing the rotation direction of the motor when the washing pump 3b is circulated. Further, instead of the drain pump 7b, a drain valve may be provided, and the washing water may be discharged by natural falling due to gravity by opening the drain valve.

A control unit 17 for controlling the washing operation is provided inside the door body 5. The control unit 17 sequentially controls a cleaning process of cleaning the object to be cleaned 13, a rinsing process of rinsing the detergent and the residue adhering to the object to be cleaned 13, and a drying process of drying the rinsed object to be cleaned 13, and performs a cleaning operation.

Next, the structure of the water storage section 8 provided in the bottom section 2b of the washing tub, and the water injection section 14 and the residue filter 9 provided in the water storage section 8 will be described in detail.

Fig. 2 is a side sectional view showing a flow of water to the residue filter in the dishwasher according to embodiment 1 of the present invention.

In fig. 2, a water storage portion 8 for storing the supplied washing water in the washing step and the rinsing step is provided in a recessed manner in the washing tub bottom portion 2 b. The water storage portion 8 is formed in a substantially cylindrical shape.

A water injection part 14 (water injection port 14a) serving as an outlet of the water supply path 4a is provided on a side surface of the water storage part 8 so as to protrude toward an inner side surface of the residue filter 9.

The mesh part 9c of the residue filter 9 is formed of, for example, a perforated metal plate made of stainless steel, and a fine mesh member such as a plain weave mesh (for example, a 50-100 mesh or a 0.28mm square mesh) is attached to the peripheral surface of the cylindrical lattice. The residue captured by the residue filter 9 is discharged out of the casing 1 together with the washing water at the time of water discharge. However, the residue or dirt captured by the residue filter 9 may remain in a state of being attached to the residue filter 9, and the mesh member may be clogged.

Further, a hole portion into which the water injection port 14a is inserted is provided in the upper side portion of the residue filter 9, and a gap is provided between the side portion of the residue filter 9 and the back side portion of the water storage portion 8, so that the residue filter 9 can be moved in the direction of the gap opposite to the water injection port 14a and removed from the water storage portion 14, and the residue filter 9 can be removed from the water storage portion 8. Similarly, the residue filter 9 can be installed by inserting the residue filter 9 into the water storage part 8 through the gap and inserting the water injection part 14 into a hole part at the side part of the residue filter 9.

The dish washing machine according to the present embodiment is configured as described above.

Next, the use and operation of the dish washing machine having the above-described configuration will be described. First, the user grips handle 5a of door 5 and pulls washing tub 2 out of housing 1 of the dishwasher. At this time, the inner lid 10 is lifted up by the link mechanism 11 in conjunction with the drawing operation of the cleaning tub 2, and is separated from the upper surface opening 2 a. Next, the user places the objects to be washed 13 such as dishes on the dish basket 6 from the upper surface opening 2a of the washing tub 2. A detergent supply device (not shown) for supplying a predetermined amount of detergent into washing tub 2. Next, the user pushes cleaning tub 2 into casing 1, and closes door 5. At this time, inner lid 10 moves down by link mechanism 11 in conjunction with the pushing-in operation of cleaning tub 2, and compresses sealing part 12 to seal upper surface opening 2 a.

After the operation process is set by the user via an operation unit (not shown) connected to the control unit 17, a start button (not shown) is operated to start the washing operation. Thus, the control unit 17 executes the cleaning operation according to the operation process. The control unit 17 sequentially executes the cleaning step, the rinsing step, and the drying step by the method described below.

First, a cleaning step in the cleaning operation will be described. Control unit 17 first controls water supply valve 4b such that water supply valve 4b is operated to supply water to washing tub 2 and supply a predetermined amount of washing water to washing tub 2. When the water supply is finished, a detergent is supplied from a detergent supply device (not shown). Then, washing water is pressurized and conveyed by driving washing pump 3b, and is sprayed from washing nozzle 3c disposed at washing tub bottom 2b, thereby circulating the washing water. The controller 17 circulates the washing water and energizes a heater (not shown) to heat the washing water. At this time, control unit 17 detects the temperature of the washing water through the wall of washing tub bottom 2b by a temperature sensor (not shown). The control unit 17 controls the washing water to a predetermined temperature.

The sprayed washing water washes dirt on the object to be washed 13, passes through the residue filter 9 and the water storage portion 8, and is sucked again by the washing pump 3 b. At this time, the residue contained in the washing water is captured by the residue filter 9. The washing pump 3b pressurizes and conveys the sucked washing water, and supplies the washing water to the washing nozzle 3 c. That is, the washing water circulates as described above to wash the object to be washed 13. The control unit 17 performs the above-described cyclic operation for a predetermined time (for example, 30 minutes).

After the circulation operation is completed, the controller 17 discharges the washing water containing the dirt to the outside of the casing 1. At this time, the residue captured by the residue filter 9 is discharged out of the casing 1 together with the washing water. Then, the control unit 17 starts the washing step along with the completion of the washing step, and supplies the washing water again into the washing tub 2.

Next, the controller 17 operates the washing pump 3b to spray new washing water from the washing nozzle 3c to the object to be washed 13, in the same manner as in the washing step. Then, the remaining detergent, residue, and the like are washed away from the object to be washed 13 with the washing water. At this time, the control unit 17 repeats the operations such as discharging of the washing water and supplying of the washing water a plurality of times (for example, 2 to 3 times), and performs the rinsing step. In particular, in the final rinsing operation, heating rinsing is performed in which the rinsing water is heated to a high temperature. Thereby, the inside of the object to be cleaned 13 and the cleaning tank 2 is heated to a high temperature, and evaporation of water in the drying step is promoted.

After the rinsing step, the control unit 17 performs a drying step. The control unit 17 controls an air blowing fan (not shown) and a heater (not shown) to heat the air introduced into the cleaning tank 2 and to discharge the wet air in the cleaning tank 2 through a communication passage (not shown) to dry the object to be cleaned 13. After the drying process is performed for a predetermined time (for example, 30 minutes), the control unit 17 ends the washing operation of the dishwasher.

Next, the circulation operation of the washing step and the rinsing step of the dishwasher, the flow of the washing water in the water discharge operation and the water supply operation will be described.

First, in the circulation operation of the washing step, the flow of the washing water flows from washing tub bottom 2b to water storage unit 8 through residue filter 9, and is sucked into circulation water channel 3a from the circulation water opening provided in water storage unit 8. This flow of the washing water is generated by driving and sucking the washing pump 3 b.

In the circulation operation, the washing water flows into the water storage unit 8 through the mesh 9c of the residue filter 9. Then, the water flows into the circulating water passage 3a in this state. At this time, most of the residue is captured by the mesh 9c, but the residue smaller than the mesh of the mesh 9c is also circulated through the mesh 9c together with the washing water.

In this way, in the washing step, the residue is captured by the residue filter 9 and accumulated while the washing water is repeatedly circulated. The control unit 17 circulates the washing water to reduce the residue contained in the washing water, and washes the object to be washed 13 for a predetermined time.

Next, in the flow of the washing water during the draining operation, the washing water flows from washing tub bottom 2b through residue filter 9, flows through water storage unit 8, and is sucked into drain passage 7a from drain port 7c provided near the bottom of water storage unit 8. This flow of the washing water is generated by driving the drain pump 7b to suck the washing water.

In the draining operation, the washing water flows into the water storage portion 8 mainly through a gap between the inner side portion of the water storage portion 8 and the side portion of the residue filter 9, and passes through the entire surface of the residue filter 9 from the outside to the inside. At this time, the small residues accumulated in the residue filter 9 are subjected to a water pressure in the opposite direction to the circulation operation, and are peeled off from the mesh part 9 c. The residue peeled off in this way is discharged out of the casing 1 through the drain passage 7a together with the washing water from the drain port 7 c.

In this way, when the washing water is discharged as the water discharge operation, the small residue accumulated on the inner surface of the residue filter 9 is peeled off by the washing water, and is discharged together with the washing water from the water discharge port 7c to the outside of the casing 1 through the water discharge pump 7 b. Thereby, the cleaning process is ended.

Next, the flow of the washing water in the water supply operation in the flushing step will be described with reference to fig. 2 to 4. Fig. 2 is a side sectional view showing a flow of water to the residue filter in the dishwasher according to embodiment 1 of the present invention. Fig. 3 is a sectional view a-a showing a flow of water injected into the residue filter in the dishwasher according to embodiment 1 of the present invention. Fig. 4 is a bottom view of the dish washing machine according to embodiment 1 of the present invention, as viewed from below the residue filter, illustrating the flow of the water to the residue filter.

In the water supply operation by the water supply portion 4 including the water supply valve 4b and the water supply path 4a, the control portion 17 controls the water supply valve 4b to directly supply water to the residue filter 9 side. The washing water flows from the water supply valve 4b through the water supply path 4a as W5 schematically shown in fig. 2, and is supplied from the water filling port 14a into the residue filter 9. That is, the washing water is injected from the water supply path 4a into the area inside the residue filter 9 while maintaining the water potential, and flows into the water storage part 8. The water potential of the washing water injected into the residue filter 9 is generated by applying water pipe pressure to the water supply valve 4 b. That is, as the water injection source of the water injection unit 14, water supply from the outside of the dish washing machine can be used.

As shown in fig. 2 and 3, a guide 20 for guiding the water injected from the water injection unit 14 is provided at a position to receive the water injection in an area inside the residue filter 9. The guide portion 20 here is constituted by a wall surface 20a protruding along the back surface of the residue filter 9, and as shown in fig. 4, the wall surface 20a is constituted in such a manner that: the water injection port 14a is provided in the vicinity thereof, and the degree of protrusion from the rear surface of the residue filter 9 increases as the distance from the vicinity of the water injection port 14a increases.

In the water supply operation, as shown by W5 in fig. 2 to 4, the injected washing water flows through the water supply path 4a and is injected from the water injection port 14a of the water injection part 14 toward the residue filter 9. As shown by W6 in fig. 4, the injected cleaning water flows along the lower side of the wall surface 20a while rushing to the wall surface 20a of the guide part 20 of the residue filter 9, and as shown by W6 in fig. 2 and 3, a swirling flow is generated on the inner surface of the residue filter 9, and the residue can be prevented from remaining on the inner surface of the residue filter 9 by cleaning substantially the entire inner surface of the residue filter 9.

That is, by such a swirling flow, fine residue or dirt adhering to the mesh part 9c of the residue filter 9 without being peeled off is peeled off and cleaned. In this way, the residue remaining in the residue filter 9 can be suppressed.

In the flushing step, as in the cleaning step, when the control unit 17 finishes the water supply from the water supply unit 4, the cleaning pump 3b is operated to perform the circulation operation. The circulation operation is similar to the cleaning step. Here, the residue is captured by the residue filter 9 by the circulation operation in the cleaning step. In addition, most of the fine residue is discharged to the outside of the casing 1 by the drainage action. The residue peeled off from the residue filter 9 by the water supply operation in the flushing step is discharged to the outside of the housing 1 in the water discharge operation after the circulation operation. Therefore, by repeating the water supply operation, the circulation operation, and the water discharge operation in the flushing step, almost all of the fine residue is discharged out of the housing 1 at the end of the flushing step, and the residue filter 9 is repeatedly cleaned, so that the residue is suppressed from remaining.

That is, the residue remaining in the post-drainage residue filter 9 is most likely to be left after drainage in the cleaning step. Therefore, the effect of cleaning the residue filter 9 by the water supply is remarkable in the water supply at the beginning of the washing process. By repeating the water supply a plurality of times in the washing step, almost all of the residue attached to the residue filter 9 is washed. In addition, in the water supply in the cleaning step, the residue remaining in the previous cleaning operation is cleaned. Basically, the residue filter 9 is cleaned until the last water supply in the previous cleaning operation, and the residual residue is very small. As described above, according to the present embodiment, the residue filter 9 is cleaned every time water is supplied, and residue can be suppressed from remaining.

The draining operation may be based on the natural falling of the washing water by gravity without using the drain pump 7b, which is described above. By the natural falling, it is possible to prevent troubles such as a failure or clogging of the drain pump 7 b. However, as the drainage progresses and the washing water becomes smaller, the drainage momentum becomes smaller, and the force of peeling the residue off the residue filter 9 also becomes smaller. In the case of the drain pump 7b, the water can be drained with a constant force, and the force for removing the residue from the residue filter 9 does not decrease as the drainage progresses, so that the drainage time can be shortened.

(embodiment mode 2)

Fig. 5 is a side sectional view showing a flow of water to the residue filter in the dishwasher according to embodiment 2 of the present invention. Fig. 6 is a B-B sectional view showing a flow of water filling to the residue filter in the dishwasher according to embodiment 2 of the present invention. Embodiment 2 will be described with reference to fig. 5 and 6. Note that the same configurations as those in embodiment 1 will not be described.

As shown in fig. 5 and 6, the guide 20 is configured to have an annular path 20b along the back surface of the residue filter 9, and a plurality of discharge ports 20c are provided on the lower surface of the path 20b, so that water is injected from the water injection port 14a of the water injection portion 14 to the path 20b and the discharge ports 20 c. In the water supply operation, as shown by W5 in fig. 5 and 6, the injected washing water flows through the water supply path 4a and is injected from the water injection port 14a of the water injection part 14 to the path 20b of the residue filter 9. As shown by W7, the injected washing water is injected into the annular passage 20 b. The washing water injected into the passage 20b is injected into the mesh portion of the residue filter 9 from the plurality of injection ports 20c provided on the lower surface of the passage 20b as indicated by W8.

By injecting water into the mesh portion of the residue filter 9 from the plurality of discharge ports 20c provided on the lower surface of the passage 20b, as shown by W8 in fig. 5, substantially the entire inner surface of the residue filter 9 is cleaned, and residue can be prevented from remaining on the inner surface of the residue filter 9.

That is, by injecting water from the plurality of discharge ports 20c in this manner, fine residue or dirt adhering to the residue filter 9 without being peeled off from the mesh portion 9c is scraped off and cleaned. In this way, the residue remaining in the residue filter 9 can be suppressed.

The discharge port 20c may be a hole inclined so as to face the mesh portion 9c of the residue filter 9, or the discharge port 20c may be provided so as to extend along the mesh portion 9 c.

(embodiment mode 3)

Fig. 7 is a schematic side sectional view of a dishwasher according to embodiment 3 of the present invention. Embodiment 3 will be described with reference to fig. 7. Note that the same configurations as those in embodiment 1 or 2 will not be described.

In embodiment 1, the configuration in which the cleaning water is injected from the water supply unit 4 into the guide unit 20 provided in the residue filter 9 and the water is injected from the guide unit 20 into the rear surface of the residue filter 9 has been described, but the present invention is not limited to this configuration.

As shown in fig. 7, a circulation unit 21 may be provided to circulate the cleaning water from the water storage unit 8. The circulation unit 21 is composed of a circulation path 21a and a circulation pump 21b, and may be configured to suck the cleaning water from the water storage unit 8 by the circulation pump 21b and to inject the water from the water injection port 14a of the water injection unit 14 to clean the inner surface of the residue filter 9.

Instead of providing such a circulation unit 21, a water path for branching the circulation water path 3a from the washing pump 3b and injecting water from the washing pump 3b to the washing nozzle 3c and a water path for injecting water from the washing pump 3b to the water injection unit 14 may be provided, and the water path for conveying washing water to the washing pump 3b may be switched.

That is, as a source of water to be injected into the water injection unit 14, water supplied from the circulation water channel 3a can be used.

Fig. 8A and 8B show an example of the water separator 38 that switches the water path for conveying the cleaning water by the cleaning pump 3B. The water diverter 38 is provided in the middle of the circulation water path 3a from the washer pump 3B, and switches between a state (fig. 8A) in which the water path 37 for injecting water from the washer pump 3B to the washer nozzle 3c is opened, a state (fig. 8A) in which the water path 35 for injecting water from the washer pump 3B to the water injection unit 14 is closed, and a state (fig. 8B) in which the water path 37 is closed and the water path 35 is opened. Diverter 38 may be a face member that swings between waterway 37 and waterway 35, or may be a valve or the like. The state of the water separator 38 is controlled by the control section 17.

In the initial stage of the cleaning step or the rinsing step, as shown in fig. 9A, the area of the portion of the residue filter 9 clogged with the captured residue is small, and therefore the resistance of the residue filter 9 is small. Therefore, as shown by solid arrows in fig. 9A, most of the residue contained in the washing water flows into the residue filter 9 and is captured by the residue filter 9. The washing water from which the residue has been removed is sucked into the circulation water channel 3a from the circulation water channel suction port 32e and circulated by the washing pump 3 b.

In the middle stage of the cleaning step or the flushing step, as shown in fig. 9B, the captured residue is accumulated in the residue filter 9 near the circulation water path suction port 32e, and the area of the portion clogged with the residue gradually increases, so that the resistance of the residue filter 9 increases. Therefore, as indicated by a broken-line arrow in fig. 9B, a part of the residue contained in the washing water is sucked into the circulation water passage 3a through a gap or the like outside the residue filter 9.

At the latter stage of the cleaning process or the rinsing process, as shown in fig. 9C, a larger area of the debris filter 9 may be clogged with debris. Even if the residue is sucked into the circulation water path 3a, the residue may flow into the residue filter 9 during the circulation and be captured by the residue filter 9. There is also a possibility that the residue remaining in the cleaning tank 2 at the end of the operation is attached to the object to be cleaned 13 again without being captured by the residue filter 9 during the circulation.

When the washing water is discharged by the drain pump 7b after the washing step or the rinsing step is completed, a part of the residue captured by the residue filter 9 is discharged together with the washing water. However, particularly in a position close to the circulating water path suction port 32e, when the captured residue is pressed against the residue filter 9 by the water pressure of the washing pump 3b and strongly adheres to the residue filter 9, the residue may remain inside the residue filter 9 even if the washing water is discharged. When most of the residue filter 9 is moved to the next step in a state of being clogged with the residue, the residue circulates outside the residue filter 9 from the initial stage of the step as shown in fig. 9B or 9C, and therefore the residue is likely to remain in a state of remaining inside the cleaning tank 2 at the end of the operation.

In the present embodiment, when the washing water is discharged, the washing water is ejected from the ejection port 20c, whereby the residue captured inside the residue filter 9 is scraped off and discharged to the outside of the dishwasher together with the washing water. As a result, in the next step, as shown in fig. 9A, the residue can easily flow into the residue filter 9, and the residue remaining in the cleaning tank 2 can be captured by the residue filter 9, whereby the amount of residue remaining in the cleaning tank 2 at the end of the operation can be further reduced. This can prevent the residue from adhering to the object to be cleaned 13 again. Further, since the amount of residue remaining in the residue filter 9 can be reduced, the dishwasher can be kept sanitary, and the generation of odor and bacteria can be suppressed.

In the cleaning step and the flushing step, since the cleaning pump 3B circulates the cleaning water, as shown in fig. 9B and 9C, the residue is likely to accumulate inside the residue filter 9 near the circulation water path suction port 32 e. As shown in fig. 10A, if the water filling port 14a is located near the circulating water channel suction port 32e, when the residue filter 9 near the circulating water channel suction port 32e is clogged with the residue, the washing water flows from the discharge port 20c to the circulating water channel suction port 32e from the outside of the residue filter 9 through the water filling port 14a, and therefore the residue cannot be captured by the residue filter 9. Therefore, as shown in fig. 10B, the water filling port 14a is disposed at a position separated from the circulating water channel suction port 32 e. This can suppress the washing water from escaping to the path from the discharge port 20c to the circulating water path suction port 32e through the water injection port 14a from the outside of the residue filter 9, thereby improving the washing efficiency. The water filling port 14a may be disposed near the circulating water channel suction port 32 e. For example, as shown in fig. 10C, when the residue filter 9 is viewed from above, an angle formed by a straight line connecting the center of the residue filter 9 and the water inlet 14a and a straight line connecting the center of the residue filter 9 and the circulating water path suction port 32e may be 45 ° or more, 50 ° or more, 55 ° or more, 60 ° or more, 65 ° or more, 70 ° or more, 75 ° or more, 80 ° or more, 85 ° or more, 90 ° or more, 95 ° or more, 100 ° or more, 110 ° or more, 120 ° or more, 130 ° or more, 140 ° or more, 150 ° or more, 160 ° or more, and 170 ° or more. The water filling port 14a may be disposed at a position facing the circulating water path suction port 32 e.

As shown in fig. 11, the washing water is ejected from the ejection port 20c at an acute angle to the inner surface of the residue filter 9, whereby the residue attached to the inner surface of the residue filter 9 can be scraped off more effectively. Therefore, the angle of the washing water discharged from the discharge port 20c may be 40 ° or less, 30 ° or less, 20 ° or less, 10 ° or less, 9 ° or less, 8 ° or less, 7 ° or less, 6 ° or less, 5 ° or less, 4 ° or less, 3 ° or less, 2 ° or less, or 1 ° or less with respect to the inner surface of the residue filter 9.

Fig. 12 is a detailed flowchart showing one cleaning operation or rinsing operation of the cleaning process or rinsing process. Fig. 13 is a timing chart showing states of the respective components in one cleaning operation or flushing operation.

Control unit 17 opens water supply valve 4b (S10) and introduces tap water into washing tub 2 until a predetermined amount of water is supplied into washing tub 2 (N of S12). After a predetermined amount of water is supplied into washing tub 2 (Y in S12), controller 17 turns on washing pump 3b (S14) and sprays washing water from washing nozzle 3c to wash object to be washed 13 until a predetermined time elapses (N in S16). In the cleaning step and the heating and washing step, the controller 17 turns on the heater. After the lapse of a predetermined time (Y in S16), the controller 17 turns off the washer pump 3b (S18). This completes the in-warehouse cleaning process.

Controller 17 opens water separator 38(S20), drives water separator 38 until water passage 37 of washing nozzle 3c is closed, and opens water passage 35 on the side of residue filter 9 (N of S22). When the path from the washing pump 3b is switched to the water path 35 (Y in S22), the controller 17 closes the water separator 38, opens the drain pump 7b, and starts draining (S24). Next, the controller 17 turns on the washing pump 3b (S26), discharges washing water from the discharge port 20c toward the residue filter 9, and discharges the residue adhering to the residue filter 9 to the outside together with the washing water until a predetermined time elapses (N of S28). After the lapse of the predetermined time (Y in S28), the controller 17 turns off the washing pump 3b (S30) and ends the washing of the residue filter 9. After a lapse of a time set in advance as a time for discharging the washing water in washing tub 2 to the outside, control unit 17 turns off drain pump (S32) and ends the water discharge. The controller 17 opens the water separator 38(S34), and drives the water separator until the water path 37 is opened and the water path 35 is closed (N of S36). When the path from the cleaning pump 3b is switched to the water path 37 (Y in S36), the filter cleaning process is ended, and one cleaning or flushing operation is ended.

In addition, although the built-in type dish washing machine has been described in all the embodiments, the filter structure and the water filling structure described above can be realized in the same configuration in the table-top type dish washing machine, and thus the present invention is not limited to the built-in type dish washing machine.

[ Industrial Applicability ]

As described above, the dishwasher of the present invention is useful as a household or commercial dishwasher, because it can wash the residue filter without spending additional time or washing water in a subsequent washing process and the like with a simple configuration even if the residue captured by the residue filter adheres to the inner side surface of the residue filter and remains, and can suppress the residue from remaining in the residue filter.

[ description of reference numerals ]

1 casing

2 rinse tank

2a upper surface opening

2b cleaning tank bottom

3 cleaning device

3a circulating water path

3b cleaning pump

3c cleaning nozzle

4 water supply part

4a water supply path

4b water supply valve

5 door body

6 tableware basket

7 drainage part

7a drainage path

7b drainage pump

7c water outlet

8 water storage part

9 residue filter

9c mesh part

10 inner cap

11 connecting rod structure

12 sealing part

13 object to be cleaned

14 water injection part

14a water filling nozzle

17 control part

20 guide part

20a wall surface

20b path

20c discharge port

21 circulation part

21a circulation path

21b circulating pump

32e circulating water path suction inlet

35 waterway

37 waterway

38 water knockout drum