阅读说明：本技术 餐具清洗机及控制方法 (Tableware cleaning machine and control method ) 是由 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及控制方法。减少餐具清洗机中残渣的残留。餐具清洗机具备：壳体(1)；清洗槽(2),被设置于壳体内,容纳被清洗物(13)；储水部(8),被设置于清洗槽的底部；残渣过滤器(9),被设置于储水部,捕获流入储水部中的清洗水中包含的残渣；排水通路(7a),连通储水部和壳体的外部；以及喷出口,将用于冲洗由残渣过滤器捕获的残渣的清洗水向残渣过滤器喷出；该餐具清洗机被构成为：清洗槽内部的清洗水经由排水通路被排出壳体外时,残渣过滤器所捕获的残渣与清洗水一起排出,清洗槽内部的清洗水的水位高于喷出口时从喷出口向残渣过滤器喷出清洗水。(The invention relates to a tableware washing machine and a control method. The residue in the dish washing machine is reduced. The dish washing machine is provided with: a housing (1); a cleaning tank (2) which is provided in the housing and accommodates an object to be cleaned (13); a water storage part (8) arranged at the bottom of the cleaning tank; a residue filter (9) which is arranged at the water storage part and captures residue contained in the cleaning water flowing into the water storage part; a drainage passage (7a) for communicating the water storage part and the outside of the shell; and a discharge port that discharges cleaning water for washing away the residue captured by the residue filter toward the residue filter; the dish washing machine is configured to: when the washing water inside the washing tub is discharged to the outside of the casing through the water discharge passage, the residue captured by the residue filter is discharged together with the washing water, and when the water level of the washing water inside the washing tub is higher than the discharge port, the washing water is discharged from the discharge port to the residue filter.)

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 unit to capture residue contained in the washing water flowing into the water storage unit,

a drain passage communicating the water storage part and the outside of the case, an

A discharge port through which washing water for washing the residue captured by the residue filter is discharged to the residue filter;

the dish washing machine is configured to: when the washing water in the washing tank is discharged out of the casing through the water discharge passage, the residue captured by the residue filter is discharged together with the washing water,

and when the water level of the cleaning water in the cleaning tank is higher than the spray opening, the cleaning water is sprayed to the residue filter from the spray opening.

2. The dishwasher of claim 1, wherein,

a washing pump for circulating the washing water flowing into the water storage part in the washing tank,

the number or area of the discharge ports is increased as the suction port for sucking washing water into the washing pump is closer.

3. The dishwasher according to claim 1 or 2, wherein,

the residue filter includes a water guide port provided to protrude outward of the residue filter and guiding washing water to the discharge port,

the tableware cleaning machine is provided with an embedding part which is used for positioning the residue filter by embedding with the water guide opening.

4. The dishwasher according to claim 1 or 2, wherein,

the residue filter includes a water guide port provided at a bottom of the residue filter for guiding the washing water to the discharge port.

5. A control method of the dishwasher according to any one of claims 1 to 4, comprising:

supplying washing water to the washing tub to wash the object to be washed;

discharging the washing water after the washing step is finished; and

and a step of ejecting the washing water from the ejection port when the water level inside the washing tub is higher than the ejection port in the draining step.

Technical Field

The present disclosure relates to a dishwasher and a control method 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 disclosure solves the above-mentioned prior art problems, and aims to reduce residue in a dish washing machine.

[ means for solving the problems ]

The dish washing machine of the present disclosure includes: a housing; a cleaning tank arranged in the housing and accommodating an object to be cleaned; a water storage part arranged at the bottom of the cleaning tank; a residue filter which is arranged at the water storage part and captures residue contained in the cleaning water flowing into the water storage part; a water discharge passage for communicating the water storage part and the outside of the shell; and a discharge port for discharging the washing water for washing the residue captured by the residue filter toward the residue filter. The dish washing machine is configured to: when the washing water in the washing tub is discharged out of the housing through the drain passage, the residue captured by the residue filter is discharged together with the washing water. When the water level of the cleaning water in the cleaning tank is higher than the ejection port, the cleaning water is ejected from the ejection port to the residue filter.

[ Effect of the invention ]

According to the present disclosure, residue in the dish washing machine can be reduced.

Drawings

FIG. 1 is a schematic side cross-sectional view of a dishwasher according to embodiment 1 of the present disclosure

FIG. 2 is a detailed perspective view showing a structure in which the bottom of the wash bowl is provided

FIG. 3 is a plan view of the structure shown in FIG. 2 with the cleaning nozzles removed

FIG. 4A is a partial cross-sectional view of AA in FIG. 3

FIG. 4B is a partial cross-sectional view of BB of FIG. 3

FIG. 5A is an exploded perspective view of the residue filter

FIG. 5B is a perspective view of the residue filter

FIG. 6A is a cross-sectional view of the residue filter

FIG. 6B is a cross-sectional view of another example of a debris filter

FIG. 7A is a diagram showing a state in which debris is captured by a debris filter

FIG. 7B is a diagram showing a state in which debris is captured by the debris filter

FIG. 7C is a diagram showing a state in which debris is captured by the debris filter

FIG. 8A is a graph showing the relationship between the water level of the washing water and the washing water discharged from the discharge port

FIG. 8B is a graph showing the relationship between the water level of the washing water and the washing water discharged from the discharge port

FIG. 8C is a graph showing the relationship between the water level of the washing water and the washing water discharged from the discharge port

FIG. 9A is a view showing a relationship between a water guide port and a circulating water path suction port

FIG. 9B is a view showing the relationship between the water guide port and the circulating water path suction port

FIG. 9C is a view showing the relationship between the water guide port and the circulating water path suction port

Fig. 10A is a diagram showing a relationship between the circulation water path suction port and the flow of the washing water

FIG. 10B is a view showing the relationship between the suction port and the discharge port of the circulation water path

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

FIG. 12A is a view showing a structure of a water guide port and a fitting portion

FIG. 12B is a view showing the structure of the water guide port and the fitting portion

FIG. 12C is a view showing the structure of the water guide port and the fitting portion

FIG. 13 is a view showing a structure of a connection part between a water guide port and a filter path

FIG. 14A is a view showing the structure of the water knockout vessel

FIG. 14B is a view showing the structure of the water knockout vessel

FIG. 15 is a flowchart showing a method of controlling the dish washing machine according to embodiment 1

FIG. 16 is a timing chart showing the states of the respective configurations of the dish washing machine according to embodiment 1

Detailed Description

The embodiments are described in detail below with reference to the drawings. In some cases, detailed descriptions beyond necessity may be omitted. For example, detailed descriptions of well-known matters or repeated descriptions of substantially the same structures may be omitted.

The drawings and the following description are provided for those skilled in the art to sufficiently understand the present disclosure, and do not intend to limit the subject matter of the claims.

(embodiment mode 1)

Embodiment 1 will be described below with reference to fig. 1 to 16.

[1-1. Structure ]

Fig. 1 is a side cross-sectional schematic view of a dish washing machine of embodiment 1 of the present disclosure. 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 drawn 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 when facing the front surface 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 1a 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 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. The washing water includes a washing liquid containing a detergent and sprayed to 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 replace the drain pump by reversing the rotation direction of the motor when the washing pump 3b circulates. 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 tank and the residue filter 9 provided in the water storage section 8 will be described in detail.

Fig. 2 is a detailed perspective view showing the structure provided at the bottom 2b of the wash bowl. Fig. 3 is a plan view of the structure shown in fig. 2 except for the cleaning nozzle 3 c. The washing tank bottom 2b is provided with a washing nozzle 3c and a water storage part 8. Washing tub bottom 2b is inclined so that the position of water storage 8 is the lowest, and the washing water supplied in the washing step and the rinsing step is collected in water storage 8 together with the residue. The water storage portion 8 is formed in a substantially cylindrical shape. A residue filter 9 is provided in the water storage portion 8. The washing pump 3b and the drain pump 7b are connected to the water storage portion 8.

Fig. 4A is a partial cross-sectional view AA of fig. 3. Fig. 4B is a partial cross-sectional view of BB of fig. 3. The residue filter 9 includes a lattice filter 30, a perforated filter 31, and a mesh filter 32.

Fig. 5A is an exploded perspective view of the residue filter 9. Fig. 5B is a perspective view of the residue filter 9.

The lattice filter 30 has a plurality of holes arranged in a lattice shape at a lower portion of the cylindrical portion, and traps relatively large residue. A handle is provided above the lattice filter 30, and the user can hold the lattice filter 30 when removing the trapped debris.

The perforated filter 31 is formed on a plane from a perforated metal plate made of stainless steel or the like. The perforated filter 31 is provided to capture the residue contained in the washing water flowing into the water storage part 8 from the outside of the opening of the lattice filter 30 so that the washing water can flow into the water storage part 8 even when the lattice filter 30 or the mesh filter 32 is clogged, in order to circulate the washing water.

The mesh filter 32 includes a mesh member 32a having fine openings such as a plain woven wire mesh (for example, a 50-100 mesh or a 0.28mm square mesh) formed of resin or the like into a substantially cylindrical shape and provided on the peripheral surface of the lattice. The mesh filter 32 captures fine residue passing through the lattice filter 30.

Fig. 6A is a sectional view of the residue filter 9. The mesh filter 32 includes a mesh member 32a for capturing the residue, a filter cleaning path 32b through which cleaning water flows for cleaning the inside of the mesh filter 32, a discharge port 32c for discharging the cleaning water flowing through the filter cleaning path 32b to the mesh member 32a, and a water guide port 32d for introducing the cleaning water into the filter cleaning path 32 b.

The water guide port 32d is provided at the side of the mesh filter 32. The filter cleaning path 32b is provided above the mesh member 32a in an upper portion of the mesh filter 32. The discharge port 32c is provided at a position of the lower surface of the filter cleaning path 32b where the mesh member 32a is provided. In the present embodiment, the grid member 32a is provided around the entire circumference of the cylinder, and therefore the discharge port 32c is also provided around the entire circumference.

By ejecting the washing water introduced from the water guide port 32d into the filter washing path 32b from the plurality of ejection ports 32c toward the mesh member 32a, the residue captured inside the mesh member 32a can be scraped off.

As the washing water for washing the residue filter 9, tap water supplied from the water supply unit 4 can be used, but in the present embodiment, the washing water remaining in the washing tub 2 is guided from the water guide port 32d to the filter washing path 32b by the washing pump 3b in the washing step or the rinsing step. Therefore, the dishwasher includes a water separator for separating the washing water sent from the washing pump 3b between the washing nozzle 3c and the water guide opening 32 d. The details of the water separator will be described later.

By providing the water supply port 32d on the side surface in the vicinity of the filter cleaning path 32b, the path from the water supply port 32d to the filter cleaning path 32b can be shortened, and therefore, the pressure loss can be suppressed. This can increase the pressure of the washing water discharged from the discharge port 32c, and can improve the washing efficiency of the mesh member 32 a. Further, when the user observes the inside of washing tub 2, it is difficult to see the washing water remaining near water guide port 32 d.

Fig. 6B is a sectional view of another example of the debris filter 9. In the example shown in fig. 6A, the water supply port 32d is provided on the side surface of the residue strainer 9, and in the example shown in fig. 6B, the water supply port 32d is provided at the bottom of the residue strainer 9. At this time, the washing water introduced from the water guide port 32d into the filter washing path 32b is ejected from the plurality of ejection ports 32c toward the mesh member 32a, and the residue captured inside the mesh member 32a can be scraped off.

In the initial stage of the cleaning step or the rinsing step, as shown in fig. 7A, the mesh member 32a of the mesh filter 32 has a small area of a portion blocked by the captured residue, and therefore the resistance of the mesh filter 32 is small. Therefore, as shown by solid arrows in fig. 7A, most of the residues contained in the washing water flow into the inside of the mesh filter 32 and are captured by the mesh member 32 a. 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. 7B, the mesh member 32a close to the circulating water path suction port 32e accumulates the captured residue, and the area of the portion closed by the residue gradually increases, so that the resistance of the mesh filter 32 increases. Therefore, as shown by the broken-line arrows in fig. 7B, a part of the residue contained in the washing water is sucked into the circulation water passage 3a from the perforations of the perforated filter 31 outside the mesh filter 32, the gaps formed by the respective components, and the like.

In the latter stage of the washing step or the rinsing step, as shown in fig. 7C, a larger area of the mesh member 32a may be blocked by the residue. Even if the residue is sucked into the circulation water path 3a, the residue may flow into the inside of the mesh filter 32 and be captured by the mesh member 32a during the circulation, but there is also a possibility that the residue remaining in the inside of the washing tub 2 at the end of the operation is not captured by the mesh member 32a during the circulation and is again attached to the object to be washed 13.

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 at a position close to the circulating water path suction port 32e, the captured residue is pressed against the mesh member 32a by the water pressure of the washing pump 3b, and the residue may remain inside the mesh member 32a even when the washing water is discharged in some cases. When the mesh member 32a is mostly moved to the next step while being blocked by the residue, the residue circulates outside the residue filter 9 from the initial stage of the step as shown in fig. 7B or 7C, and therefore the residue is likely to remain in the inside of the washing 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 32c, whereby the residue captured inside the mesh member 32a 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. 7A, 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. Therefore, the amount of residue remaining in cleaning tank 2 at the end of operation can be further reduced, and hence reattachment of the residue to object to be cleaned 13 can be suppressed. 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.

When residue filter 9 is cleaned while the cleaning water is being discharged, as shown in fig. 8A, it is preferable that the cleaning water is discharged from discharge port 32c when water level 33 of the cleaning water in cleaning tub 2 is higher than discharge port 32 c. Since the generation of bubbles can be suppressed by jetting the washing water into the water, a problem (air entrainment) caused by the bubbles entering the washing pump 3b can be suppressed. Further, by jetting the washing water into the water, the water potential can be made to be in a wider range, and thus the washing performance can be improved. In addition, since splash on the water surface can be suppressed by jetting the washing water into the water, the amount of the residue is reduced, and the washing efficiency can be improved.

The water is drained, and as shown in fig. 8B, even if the water level 33 is lower than the ejection port 32c, the ejection of the washing water from the ejection port 32c can be continued. Since the residue attached to the upper portion of the residue filter 9 is scraped off at the initial stage of drainage, when the water level 33 is lower than the discharge port 32c, even if the washing water is discharged from the discharge port 32c, the residue attached to the upper portion of the residue filter 9 is not scattered.

Further, as shown in fig. 8C, the cleaning of the residue filter 9 is finished before the water level 33 becomes lower than the circulating water path suction port 32 e. As described above, since the washing pump 3b is driven and the washing water sucked from the circulation water path suction port 32e is guided to the filter washing path 32b of the mesh filter 32 by the washing pump 3b in the process of washing the residue filter 9, if the water level 33 is lower than the circulation water path suction port 32e, air is sucked into the washing pump 3b and a trouble (air entrainment) occurs. Therefore, before the water level 33 becomes lower than the circulating water channel suction port 32e, the cleaning pump 3b is stopped, and the cleaning of the residue filter 9 is finished.

In the cleaning step and the flushing step, the cleaning pump 3B circulates the cleaning water, so that as shown in fig. 7B and 7C, the residue is likely to accumulate inside the mesh member 32a in the vicinity of the circulating water path suction port 32 e. As shown in fig. 9A, if the water guide port 32d is located near the circulating water channel inlet port 32e, if the mesh member 32a near the circulating water channel inlet port 32e is closed by the residue, the washing water flows from the discharge port 32c to the circulating water channel inlet port 32e from the outside of the mesh member 32a through the water guide port 32d, and therefore the residue cannot be captured by the mesh member 32 a. Therefore, as shown in fig. 9B, the water guide port 32d is disposed at a position separated from the circulating water path suction port 32 e. This can suppress the washing water from escaping to the path from the discharge port 32c to the circulating water path suction port 32e from the outside of the mesh member 32a through the water guide port 32d, thereby improving the washing efficiency. The water guide port 32d may be disposed near the circulating water channel suction port 32 e. For example, as shown in fig. 9C, when the mesh filter 32 is viewed from above, an angle formed by a straight line connecting the center of the mesh filter 32 and the water supply port 32d and a straight line connecting the center of the mesh filter 32 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 guide port 32d may be disposed at a position facing the circulating water path suction port 32 e.

As shown in fig. 10A, the closer to the circulating water channel suction port 32e, the larger the amount of washing water passing therethrough, and therefore, the residue tends to accumulate inside the mesh member 32 a. Therefore, as shown in fig. 10B, the number or area of the discharge ports 32c is increased as the distance from the circulating water channel suction port 32e increases, and more washing water is discharged to the mesh member 32 a. This can improve the cleaning performance.

As shown in fig. 11, by discharging the washing water from the discharge port 32c at an acute angle to the inner surface of the mesh member 32a, the residue attached to the inner surface of the mesh member 32a can be scraped off more effectively. Therefore, the angle of jetting the washing water from the jetting port 32c 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 mesh member 32 a.

As shown in fig. 6A, when the water supply port 32d is provided on the side surface of the mesh filter 32, when the mesh filter 32 is provided in the water storage part 8, it is necessary to position the mesh filter 32 so that the filter path from the washing pump 3b to the water supply port 32d is connected to the water supply port 32 d. In the present embodiment, as shown in fig. 12A, a fitting portion 34 that fits into a water guide port 32d protruding to a side surface of the mesh filter 32 is provided in the water storage portion 8. The fitting portion 34 is a C-shaped rib fitted to the outer periphery of the water guide port 32 d. When the mesh filter 32 is installed in the water storage part 8, as shown in fig. 12B, the mesh filter 32 is inserted into the water storage part 8, and then the mesh filter 32 is rotated. As shown in fig. 12C, the water guide port 32d is fitted to the fitting portion 34, whereby the mesh filter 32 is positioned at a position where the filter path and the water guide port 32d are connected. At this time, the stopper 32f provided on the outer surface of the water guide port 32d abuts on the fitting portion 34, thereby suppressing excessive rotation of the mesh filter 32. Further, since the fitting portion 34 is made of an elastic material and is biased so as to tighten the water guide port 32d from the outside, the rotation of the mesh filter 32 in the opposite direction is suppressed. This can maintain the filter path and the water guide port 32d in a connected state, and therefore, the pressure loss of the washing water can be suppressed, and the washing performance can be improved. Further, by positioning the mesh filter 32 near the water supply port 32d, the filter path and the water supply port 32d can be connected with higher accuracy.

As shown in fig. 13, the connection portion 35a between the filter path 35 and the water guide port 32d has a multilayer structure of two or more layers. This can increase the resistance of the gap formed in the connecting portion 35a, and can suppress leakage of the washing water from the gap, thereby suppressing the pressure loss of the washing water and improving the washing performance.

Fig. 14 shows an example of a water separator 38 that guides the washing water sent from the washing pump 3b to the washing nozzle path 37 of the washing nozzle 3c and divides the water between the filter paths 35. The water separator 38 is provided in the middle of the path 36 of the washing water sent from the washing pump 3b, and switches between a state in which the washing nozzle path 37 is opened and the filter path 35 is closed, and a state in which the washing nozzle path 37 is closed and the filter path 35 is opened. The water separator 38 may be a face member that swings between the cleaning nozzle path 37 and the filter path 35, or may be a valve or the like. The state of the water separator 38 is controlled by the control section 17.

[1-2. actions ]

The operation and action of the dish washing machine configured as described above will be described below.

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 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, controller 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 unit 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 of discharging the washing water, supplying the washing water, and the like 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.

Fig. 15 is a detailed flowchart showing one cleaning operation or rinsing operation in the cleaning step or rinsing step. Fig. 16 is a timing chart showing the state of each configuration 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.

The control section 17 opens the water separator 38(S20), drives the water separator 38 until the cleaning nozzle path 37 is closed, and opens the filter path 35 (N of S22). When the route from the washing pump 3b is switched to the filter route 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 32c toward the mesh member 32a, and discharges the residue adhering to the mesh member 32a to the outside together with the washing water until a predetermined time elapses (N of S28). After a predetermined time (Y in S28) set in advance as the time when the water level of the washing water becomes lower than the discharge port 32c has elapsed, the controller 17 turns off the washing pump 3b (S30) and finishes washing 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 closes drain pump 7b (S32), and ends the water discharge. The control section 17 opens the water separator 38(S34), drives the water separator until the cleaning nozzle path 37 is opened and the filter path 35 is closed (N of S36). When the path from the cleaning pump 3b is switched to the cleaning nozzle path 37 (Y in S36), the filter cleaning process is ended, and the primary cleaning or flushing operation is ended.

When the heated rinsing is started, the cleaning agent may be put into the cleaning tank 2. This can reduce the contact angle of water, thereby further promoting the evaporation of water in the drying step. Further, since the filter cleaning step is performed in the drain water after the heating and washing, the filter cleaning path 32b or the filter path 35 can be sprayed with the cleaning agent contained in the cleaning water, and thus the drying of these paths can be promoted, and the sanitary aspect can be improved. Since most of the residue is discharged to the outside in the cleaning step or the rinsing step before the heating rinsing is performed, the filter cleaning step may be performed by driving the cleaning pump 3b without discharging the cleaning water during the heating rinsing or after the heating rinsing. This enables efficient removal of dirt such as oil adhering to the mesh filter 32 and the like.

[1-3. Effect, etc. ]

As described above, in the present embodiment, the dish washing machine includes: a housing 1; a cleaning tank 2 provided in the housing 1 and accommodating an object to be cleaned 13; a water storage section 8 provided at the bottom of the cleaning tank 2; a residue filter 9 provided in the water storage unit 8 and capturing residues contained in the washing water flowing into the water storage unit 8; a drain passage 7a communicating the water storage portion 8 and the outside of the housing 1; a discharge port 32c for discharging cleaning water for washing away the residue captured by the residue filter 9 to the residue filter 9; the dish washing machine is configured to: when the washing water inside washing tub 2 is discharged to the outside of casing 1 through water discharge passage 7a, the residue captured by residue filter 9 is discharged together with the washing water, and when the water level of the washing water inside washing tub 2 is higher than discharge port 32c, the washing water is discharged from discharge port 32c toward residue filter 9. This can suppress the generation of air bubbles, and thus can suppress a problem (air entrainment) caused by the air bubbles entering the purge pump 3 b. In addition, the water potential can be made to be in a wider range, and the cleaning performance can be improved. In addition, splash on the water surface can be inhibited, so that residue winding can be reduced, and the cleaning efficiency can be improved.

In the present embodiment, the dish washing machine includes washing pump 3b for circulating the washing water flowing into water storage unit 8 through washing tub 2, and the number or area of discharge ports 32c is increased as the washing water is closer to circulation water path suction port 32e for sucking the washing water into washing pump 3 b. This can improve the cleaning efficiency.

In the present embodiment, the residue filter 9 includes the water guide port 32d provided so as to protrude outward of the residue filter 9 and guiding the washing water to the discharge port 32c, and the dishwasher further includes the fitting portion 34 for positioning the residue filter 9 by fitting to the water guide port 32 d. This can suppress the pressure loss of the washing water, and can improve the washing efficiency.

In the present embodiment, the residue filter 9 includes a water guide port 32d provided at the bottom of the residue filter 9 to guide the washing water to the discharge port 32 c. This can improve the cleaning efficiency.

In addition, in the present embodiment, the method of controlling the dish washing machine includes: a step of supplying washing water to washing tub 2 to wash object to be washed 13; a step of discharging the washing water after the washing step is finished; and a step of ejecting the washing water from the ejection port 32c when the water level inside the washing tub 2 is higher than the ejection port 32c in the step of draining. This can suppress the generation of air bubbles, and thus can suppress a problem (air entrainment) caused by the air bubbles entering the purge pump 3 b. In addition, the water potential can be made to be in a wider range, and therefore, the cleaning performance can be improved. In addition, splash on the water surface can be inhibited, so that residue winding can be reduced, and the cleaning efficiency can be improved.

(other embodiments)

As described above, embodiment 1 has been described as an example of the technique disclosed in the present application. However, the technique of the present disclosure is not limited to this, and can be applied to embodiments in which changes, substitutions, additions, omissions, and the like are made. In addition, each component described in embodiment 1 above may be combined to form a new embodiment.

Therefore, other embodiments are exemplified below.

In embodiment 1, the description has been given of the built-in type dish washing machine, but the technique of embodiment 1 can be similarly applied to a table-top type dish washing machine.

In embodiment 1, the filter cleaning is performed during the draining process in the cleaning process or the rinsing process during the operation of the dish washing machine, but a dedicated operation process for cleaning the residue filter 9 may be provided in addition to the operation process for cleaning the objects to be cleaned 13. In this case, as in embodiment 1, the washing water may be supplied into washing tub 2, or the tap water may be directly introduced from water supply passage 4a into filter washing passage 32b of mesh filter 32. In addition, the detergent may be automatically supplied into washing tub 2.

The above-described embodiments are intended to exemplify the technology of the present disclosure, and various modifications, substitutions, additions, omissions, and the like may be made within the scope of the claims and the equivalents thereof.

[ Industrial Applicability ]

The present disclosure can be utilized in a dish washing machine.

[ description of reference numerals ]

1 casing

1a front surface opening part

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 passage

4b water supply valve

5 door body

6 tableware basket

7 drainage part

7a drainage channel

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 path

21a circulation path

21b circulating pump

30 grid filter

31 perforating filter

32 mesh filter

32a grid member

32b Filter cleaning Path

32c discharge port

32d water guide port

32e circulating water path suction inlet

32f stop block

33 water level

34 fitting part

35 filter path

35a connecting part

36 route

37 cleaning nozzle path

38 water knockout drum