CN210871376U

CN210871376U - Tableware cleaning machine

Info

Publication number: CN210871376U
Application number: CN201920783632.8U
Authority: CN
Inventors: 后藤惇; 松浦直纪; 宫瀬启明
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2018-05-31
Filing date: 2019-05-28
Publication date: 2020-06-30
Anticipated expiration: 2029-05-28
Also published as: JP2019208538A

Abstract

The utility model provides a tableware cleaning machine, include: a housing (1); a cleaning tank (2) which is provided in the housing (1) and which stores an object to be cleaned (13); a water accumulation part (8) which is provided at the bottom (2b) of the cleaning tank; a residue filter (9) fixed to the water storage unit (8); a drainage passage (7a) which communicates the water reservoir (8) with the outside of the housing (1); a check valve (22) provided in the drain passage and preventing backflow of drain water; and a control unit (17) that executes a cleaning operation. The drain passage is provided outside the bottom part (2b) of the washing tank, and the bottom part of the washing tank includes a detachable drain passage unit (21) constituting a part of the drain passage (7a) at a position where the check valve (22) is detachable. Thus, the drain passage can be disassembled from the inside of the cleaning tank by a simple structure, and the check valve (22) can be easily accessed, thereby eliminating the defects such as blockage and the like, cleaning and the like with less working hours and performing maintenance.

Description

Tableware cleaning machine

Technical Field

The utility model relates to a tableware cleaning machine for cleaning the objects to be cleaned such as tableware contained in a cleaning tank.

Background

A dishwasher shown in fig. 15 has been disclosed (for example, see patent document 1). Fig. 15 is a vertical sectional view of the conventional dishwasher described in patent document 1.

As shown in fig. 15, the dish washing machine of patent document 1 includes a main body 100 and a washing tub 101 for storing dishes in the main body 100. The cleaning tank 101 has a recess formed in the bottom thereof into which cleaning water and the like flow. A residue filter 107 is disposed in the recess so as to cover the upper surface. A washing pump 102 and a drain pump 103 are disposed between the bottom of the washing tub 101 and the bottom of the main body 100. The washing pump 102 sucks the water accumulated in the bottom and sprays the water into the washing tank 101. The drain pump 103 sucks water from the bottom of the cleaning tank 101, and discharges the water to the outside of the machine through a drain passage.

The residue filter 107 is composed of the residue basket 104, the metal plate 105, the metal mesh 106, and the like. The residue basket 104 collects large food residues while the washing water is discharged. The metal plate 105 has dewatering holes and an inclined portion for allowing the residue to flow into the residue basket 104. The wire mesh eye 106 prevents debris from entering the wash pump 102. A water injection pipe 108 constituting the water injection part is provided on the outer periphery of the metal mesh part 106, and injects water so as to spray water from the outside to the inside. The residue attached to the metal mesh part 106 is removed by water injection.

Specifically, when the dishwasher starts a washing operation, water is supplied into washing tub 101, and the water is accumulated in the bottom of washing tub 101. The stored water is sprayed into the washing tub 101 by the washing pump 102 to wash dishes.

After the washing is completed, the drain pump 103 is operated to drain the water in the washing tank 101 to the outside of the machine through the drain passage.

When the operation of the drain pump 103 is stopped, water is sprayed from the outside of the metal mesh portion 106 from the water injection pipe 108 disposed around the outside of the metal mesh portion 106 of the residue filter 107. Thereby, the residue adhering to the metal mesh 106 is washed inside the residue filter 107, and the residue is removed.

When the water supply is completed, the drain pump 103 is operated again to suck the accumulated water from the bottom of the cleaning tank 101 and discharge the water to the outside of the machine through the drain passage.

With this configuration, the residue such as fine food adhering to the metal mesh 106 is washed away by injecting water to the inside of the residue filter 107. Therefore, after the washing is finished, the residue taste of the food and the like can not remain in the box of the tableware washing machine. Therefore, the transfer of the residue smell to the tableware can be prevented.

That is, the conventional dish washing machine collects food residue using the wire mesh of the residue filter. When the washing water is discharged, the collected food residue is removed from the wire mesh together with the washing water and discharged to the outside of the machine. Therefore, the large food waste, which may clog the drain pump, is collected by the waste basket.

In addition, the drain passage of the conventional dish washing machine is raised to a high position behind the washing tub and communicates with the outside of the machine. Therefore, when the drain pump is stopped, there is a risk that the washing water and the residue flowing through the drain passage flow backward. Therefore, a check valve is usually provided in the vicinity of the drain pump. However, if the residue is caught in the check valve or the drain passage is clogged, the cleaning pump needs to be removed for maintenance, which takes a lot of time.

Documents of the prior art

Patent document

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

SUMMERY OF THE UTILITY MODEL

The utility model provides a tableware cleaning machine which can easily approach a drainage channel and eliminate bad phenomena such as blockage with less working hours.

The utility model discloses a dish washing machine includes: a housing; a cleaning tank provided in the housing and configured to receive an object to be cleaned; a water accumulation part arranged at the bottom of the cleaning tank; a residue filter detachably fixed to the water storage unit; a water discharge passage for communicating the water storage part with the outside of the case; and a control unit that executes a cleaning operation including a cleaning step and a rinsing step. The drain passage includes a drain passage unit constituting a part of the drain passage, and the drain passage unit is disposed so as to be detachable from the inside of the cleaning tank.

In the dishwasher, the drain passage unit is disposed at the bottom of the washing tub or at the side of the washing tub.

In the dishwasher, the check valve for preventing the drain in the drain passage from flowing backward into the washing tub is disposed in the drain passage, and the check valve is disposed at a position detachable by detaching the drain passage unit.

In the dishwasher, the check valve is disposed in the drain passage directly in front of or behind the drain passage unit, or in the drain passage formed in the drain passage unit.

With this configuration, the drain passage can be disassembled from the inside of the cleaning tank with a simple configuration. This makes it possible to easily access the drain passage and to perform maintenance such as cleaning and elimination of defects such as clogging with a small number of steps.

Drawings

Fig. 1 is a schematic diagram showing a side cross section of a dish washing machine according to an embodiment of the present invention.

FIG. 2 is a top view of the bottom of the wash tank of the dish washing machine.

Fig. 3 is a cross-sectional view taken along line 3-3 of fig. 2.

Fig. 4 is a plan view of the residue filter removed from the state of fig. 2.

Fig. 5 is a perspective view as seen from a section of line 5-5 of fig. 4.

FIG. 6 is a side view of the vicinity of the bottom of the wash tank of the dish washing machine.

Fig. 7 is a view showing a cross section taken along line 7-7 of fig. 6.

Fig. 8 is an exploded perspective view of the dishwasher after separating the residue filter from the water storage part.

Fig. 9 is an exploded perspective view of the dish washing machine with the drain passage unit and the check valve separated from the water reservoir.

Fig. 10 is an explanatory diagram showing the flow of washing water during the circulation operation of the dish washing machine.

Fig. 11 is an explanatory diagram showing the flow of washing water during the draining operation of the dishwasher.

Fig. 12 is an explanatory diagram showing the flow of washing water during the draining operation of the dishwasher.

Fig. 13A is an explanatory diagram illustrating the flow of washing water during the draining operation of the dishwasher.

Fig. 13B is an explanatory diagram showing the flow of the washing water during the draining operation of the dishwasher.

Fig. 14 is a perspective view of a dish washing machine according to another embodiment of the present invention.

Fig. 15 is a side sectional view of the conventional dish washing machine.

Description of the reference numerals

1. 71 a housing; 1a, 72a front surface opening parts; 2. 72, 101 cleaning tank; 2a upper surface opening part; 2b cleaning the bottom of the tank; 3, cleaning the device; 3a circulating waterway; 3b, 102 cleaning the pump; 3c cleaning the nozzle; 3d circulating water crossing; 4a water supply part; 4a water supply path; 4b a water supply valve; 4c, a water injection port; 5. 73 a door body; 5a, holding a handle; 6. 75 a cutlery basket; 7a water discharge part; 7a drain passage; 7aa a 1 st drain passage; 7ab 2 nd drain passage; 7b, 103 draining pump; 7c a water outlet; 7d a protrusion; 8, a water accumulation part; 8a the 1 st water reservoir; 8b a 2 nd water-storing part; 8c, the bottom of the water accumulation part; 9a residue filter; 9a No. 1 filter; 9aa punching; 9b a No. 2 filter; 9c a 3 rd filter; 9d mesh member; 10, an inner cover; 11 a link mechanism; 12 a sealing part; 13 an object to be cleaned; 14 a heater; 15 a temperature sensor; 16 a detergent supply device; 17 a control unit; 18 an opening part; 19 an engaging part; 19a 1 st engaging part; 19b the 2 nd engaging part; 21 a drain passage unit; 22a check valve; 22a valve core; 74 a support rail; 76 baskets of rails; 100 a main body; 104 residue basket; 105 a metal plate; 106 metal mesh eyes; 107 residue filter; 108 a water injection pipe; SK integrated kitchen.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present embodiment is not intended to limit the present invention.

(embodiment mode)

Hereinafter, a dish washing machine according to an embodiment of the present invention will be described with reference to fig. 1.

Fig. 1 is a schematic diagram showing a side cross section of a dish washing machine according to an embodiment of the present invention. Specifically, fig. 1 is a schematic view of a state in which the dish washing machine is inserted into the integrated kitchen SK.

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

In the following description, for example, as shown in fig. 1, the front side is a direction in which door body 5 and cleaning tank 2 are pulled out, and the rear side is a direction in which cleaning tank 2 is housed and door body 5 is closed. The description will be given with reference to the side on which the dishwasher is installed as the lower side and the side opposite to the side as the upper side. As shown in fig. 2 and the like, the description will be made with the right side being the right side and the left side being the left side when facing the front surface of the door body 5.

The housing 1 has a front opening 1a opened in a front surface. Washing tub 2 includes dish basket 6, washing nozzle 3c, water reservoir 8, residue filter 9, and the like. The cleaning tank 2 is provided inside the casing 1 and is configured to be pulled out or pushed in the front-rear direction. Cleaning tank 2 has an upper surface opening 2a opened in the upper surface. When cleaning tub 2 is housed in casing 1, upper surface opening 2a is closed by inner lid 10 disposed in casing 1. The inner lid 10 is moved up and down by the link mechanism 11 in conjunction with the drawing or pushing operation of the cleaning tub 2. Sealing section 12 is disposed at a flange-like peripheral edge portion on the upper surface opening 2a side of cleaning tank 2. The seal portion 12 is formed of a deformable hollow, for example, rubber tube. When cleaning tub 2 is housed in casing 1, sealing portion 12 is compressed by inner lid 10 which is lowered. Thereby, the upper surface opening 2a of the cleaning tub 2 is sealed by the inner lid 10 via the sealing part 12.

The dish basket 6 is loaded with objects to be washed 13 such as dishes. Door 5 is disposed in the front of cleaning tub 2, and covers front surface opening 1a of case 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 tap 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 supply tap water as washing water into washing tub 2.

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 circulating water passage 3a communicates the water reservoir 8 and the washing nozzle 3c via the washing pump 3 b. The washing pump 3b is provided in the circulation water path 3a and fixed to the outside of the bottom surface of the washing tub 2. The suction side of the cleaning pump 3b communicates with the water reservoir 8. Washing pump 3b circulates the washing water from which the residue has been removed by residue filter 9 through circulation water path 3a and washing nozzle 3c in washing tub 2.

Cleaning nozzle 3c is disposed near the bottom surface side in cleaning tank 2. The washing pump 3b pressurizes and conveys washing water to the washing nozzle 3c via the circulation water passage 3 a. The washing nozzle 3c is rotated by a reaction force of the pressurized washing water jet, and sprays the washing water toward the object to be washed 13. That is, washing pump 3b pressurizes washing water stored in washing tub 2 and supplies the pressurized washing water to washing nozzle 3 c. The washing water sprayed from the washing nozzle 3c collides with the objects to be washed 13 such as tableware to wash away dirt, and washing is performed. The washing water includes a washing liquid that contains a detergent and is sprayed to the objects to be washed 13, and rinsing water for rinsing the objects to be washed 13.

Water reservoir 8 is provided in a shape recessed downward from cleaning tank bottom 2b in cleaning tank 2. The residue filter 9 is detachably attached to the cleaning tank 2 side of the water storage unit 8, and captures the residue 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 heater 14 heats the washing water stored in the washing tub 2 in the washing step or the rinsing step. In the drying step, the heater 14 heats the air in the cleaning tank 2 to dry the object to be cleaned 13 in the cleaning tank 2. The temperature sensor 15 is composed of, for example, a thermistor, and is disposed outside the bottom surface of the washing tub 2. Temperature sensor 15 detects the temperature of the cleaning water, air, and the like in cleaning tank 2. Detergent supply device 16 is provided on the front side surface of washing tub 2 facing door body 5, and supplies detergent into washing tub 2.

The drain portion 7 includes a drain passage 7a, a drain pump 7b, a drain port 7c (see fig. 3), and the like. The water drain 7 discharges the washing water flowing into the water storage 8 to the outside of the casing 1. In addition, the drain pump 7b may be replaced with a drain pump in which the rotation direction of the motor of the washing pump 3b is reversed with respect to the rotation direction of the motor of the washing pump 3b during circulation of the washing water. In addition, a drain valve may be provided instead of the drain pump 7b without providing the drain pump 7 b. In this case, the drain valve is opened to discharge the washing water by natural falling caused by gravity.

Control unit 17 is disposed inside door 5 and outside the front of washing tub 2, and controls the execution of the washing operation. Specifically, the cleaning operation includes a cleaning step of cleaning the object to be cleaned 13, a rinsing step of rinsing the detergent and residues adhering to the object to be cleaned 13, a drying step of drying the object to be cleaned 13 after the rinsing is completed, and the like. The control unit 17 sequentially controls the above steps to perform the cleaning operation.

Next, the structure of water collection unit 8 formed in washing tub bottom 2b, water supply unit 4 disposed in water collection unit 8, residue filter 9, and water discharge unit 7 will be described in detail with reference to fig. 2 to 8.

Fig. 2 is a plan view of a washing tub bottom 2b of the dishwasher of the embodiment. Fig. 3 is a cross-sectional view taken along line 3-3 of fig. 2. Fig. 4 is a plan view of the residue filter 9 removed from the state of fig. 2. Fig. 5 is a perspective view as seen from a section of line 5-5 of fig. 4. Fig. 6 is a side view of the lower portion of the cleaning tank 2. Fig. 7 is a view showing a cross section taken along line 7-7 of fig. 6. Fig. 8 is an exploded perspective view of the residue filter 9 and the water accumulating unit 8 separated from each other.

Water reservoir 8 is formed in washing tub bottom 2b as shown in fig. 3, for example, and stores washing water supplied through water supply passage 4a in the washing step and the rinsing step. The water storage unit 8 includes a 1 st water storage unit 8a and a 2 nd water storage unit 8b, which are recessed in two stages.

As shown in fig. 4, first water storage unit 1a of stage 1 is formed in a substantially rectangular shape (including a rectangular shape) having a shallow depth in the vicinity of the center of washing tub 2 in the left-right direction and in the front (door body 5 side). As shown in fig. 3 and 5, the 1 st water storage unit 8a is formed to be inclined downward toward the center of the 1 st water storage unit 8 a.

The 2 nd water reservoir 8b of the 2 nd stage is formed in a substantially cylindrical shape (including a cylindrical shape) having a deep depth downward at the center of the 1 st water reservoir 8 a. As shown in fig. 3 or 5, the 2 nd water collector 8b is provided with a circulating water port 3d serving as an inlet of the circulating water passage 3a, a water injection port 4c serving as an outlet of the water supply passage 4a, a water discharge port 7c serving as an inlet of the water discharge passage 7a, and the like, on a side surface near the water collector bottom 8 c. Specifically, the circulating water inlet 3d is formed of an aggregate of a plurality of square holes (for example, 2mm square) arranged in a grid pattern, for example. The circulating water inlet 3d is disposed in the vicinity of the middle of the 2 nd water storage unit 8b in the vertical direction within a range of about half a circumference in the circumferential direction. The water injection port 4c and the water discharge port 7c are disposed at circumferentially spaced positions in the vicinity of the bottom 8c of the water accumulating portion and on the side surface of the 2 nd water accumulating portion 8 b. At this time, as shown in fig. 5 and 7, the water filling port 4c and the water discharge port 7c are formed at positions not opposed to each other.

As shown in fig. 8, the residue filter 9 is detachably attached to the inside of the water storage unit 8. The residue filter 9 is formed of 3 types of filters, i.e., a 1 st filter 9a, a 2 nd filter 9b, and a 3 rd filter 9c, and is configured to be detachable from each other. The 3 rd filter 9c is disposed in the opening 18 at the center of the 1 st filter 9a, and the 2 nd filter 9b is disposed on the upstream side of the 3 rd filter 9 c.

Specifically, the 1 st strainer 9a is formed of a punched metal plate made of stainless steel, for example, and is provided so as to cover the 1 st water storage part 8a on an extension line in the horizontal direction of the bottom surface of the washing tub 2. the 1 st strainer 9a has a plurality of punched holes 9aa having a pitch of, for example, 2mm of Φ 1mm ×. that is, the punched holes 9aa are formed in a shape that allows the passage of debris having a size that does not cause a problem such as clogging of the circulation water path 3a and the washing pump 3 b. the 1 st strainer 9a further has an opening 18 formed in the center thereof into which the 3 rd strainer 9c is inserted.

The 2 nd strainer 9b is formed in a grid of a resin such as polypropylene (PP), for example, and is configured in a bottomed cylindrical shape, and the residue passing through the 2 nd strainer 9b is discharged to the outside of the casing 1 together with washing water at the time of draining as described later, and the grid of the 2 nd strainer 9b is formed in a shape in which the residue of a size (for example, more than 5mm × 5mm × 20mm) to the extent that the locking of the drain pump 7b is caused and the drain passage 7a is blocked cannot pass through.

However, large residues may pass through the grating of the 2 nd filter 9 b. Further, a projection 7d is provided in the drain port 7 c. This prevents the projection 7d from allowing the drain pump 7b to be locked and allowing the residue of a size sufficient to block the drain passage 7a to pass therethrough. The projection 7d more reliably suppresses the occurrence of clogging or the like of the drain 7. That is, the 2 nd filter 9b has a function as a strainer. Therefore, particularly in a dishwasher or the like having the drain pump 7b, it is useful to dispose the 2 nd filter 9 b.

The 3 rd filter 9c is formed in a cylindrical lattice shape and has a mesh member 9d (see fig. 3) attached to the peripheral surface. The mesh member 9d has fine openings such as a plain mesh (for example, a square hole mesh of about 50 to 100 mesh or 0.28 mm) of a wire mesh. Thereby, the portion of the residue passing through the 2 nd filter 9b except for the residue passing through the minute opening of the 3 rd filter 9c is captured by the 3 rd filter 9 c. The residue captured by the 3 rd strainer 9c is discharged out of the casing 1 together with the washing water at the time of draining.

The 3 rd filter 9c is inserted and fixed into the central opening 18, whereby the 1 st filter 9a is fixed to the water storage unit 8. Specifically, the 3 rd filter 9c is screwed to a rotary engagement portion (not shown) formed near the bottom 8c of the water accumulating portion. Thereby, the 1 st filter 9a is fixed to the water storage unit 8 via the 3 rd filter 9 c.

The 3 rd filter 9c has a pair of 2 nd engaging portions 19b on the upper surface side, which constitute one of the engaging portions 19. Similarly, the 2 nd filter 9b has a pair of 1 st engaging portions 19a constituting the other of the engaging portions 19 on the upper surface side. Then, the 2 nd filter 9b is inserted into the 3 rd filter 9c in a predetermined orientation in which the 1 st engaging portion 19a of the 2 nd filter 9b faces the 2 nd engaging portion 19b of the 3 rd filter 9c, and is pressed in until the end. Thereby, the 1 st engaging portion 19a and the 2 nd engaging portion 19b formed to be opposed to each other at the upper portion are engaged with each other, and the 2 nd filter 9b is fixed to the 3 rd filter 9 c.

Next, the drain passage unit 21 of the water accumulation portion 8 provided in the cleaning tank bottom portion 2b will be described with reference to fig. 3 and 5 and fig. 9. Fig. 9 is a perspective view of a partial dissection after the drainage passage unit 21 and the check valve 22 are separated from the water accumulating portion 8.

That is, fig. 9 illustrates a state in which the check valve 22 disposed immediately behind the downstream side of the drain passage unit 21 is pulled out from the drain passage unit 21.

As shown in fig. 3 and 5, the drain passage 7a is integrally provided on the radial outer side of the water reservoir 8, for example, at the lower left of the washing tub bottom 2 b. The drain passage 7a includes a 1 st drain passage 7aa extending from the drain port 7c to the drain pump 7b, a 2 nd drain passage 7ab located downstream of the drain pump 7b, and the like.

The drain passage unit 21 includes a portion of the 2 nd drain passage 7ab that passes above the drain pump 7 b. In addition, in the case where the drain passage 7a is integrally formed outside the side portion of the cleaning tank 2, the drain passage unit 21 may be provided on the side portion of the cleaning tank 2.

The check valve 22 is detachably disposed right behind the downstream side of the drain passage unit 21. The check valve 22 includes a spool 22a (see fig. 13A) and the like. As shown in fig. 13B, the valve body 22a is opened by the water pressure of the washing water flowing during the water discharge. On the other hand, as shown in fig. 13A, the spool 22a is closed by the reverse water pressure. When the drain pump 7b is stopped, the check valve 22 prevents the drain remaining on the downstream side of the check valve 22 in the drain passage 7a from flowing backward to the water reservoir 8. This reduces the amount of backflow to the water reservoir 8 by the amount corresponding to the water remaining in the 1 st and 2 nd water discharge passages 7aa and 7 ab. The position where the check valve 22 is disposed is not limited to the above-described position. For example, the drain passage unit 21 may be disposed immediately before the upstream side thereof. Further, a part of the 2 nd drain passage 7ab formed in the drain passage unit 21 may be provided. That is, when the check valve 22 is provided in the 2 nd drain passage 7ab directly in front of or behind the drain passage unit 21, the check valve 22 can be pulled out and removed from the 2 nd drain passage 7ab when the drain passage unit 21 is removed. When the check valve 22 is disposed in the 2 nd drain passage 7ab of the drain passage unit 21, the check valve 22 can be removed together with the drain passage unit 21.

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 structure 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 by the link mechanism 11 in conjunction with the drawing operation of the cleaning tub 2, and is separated from the upper surface opening 2a of the cleaning tub 2.

Next, the user sets the object to be washed 13, such as tableware, on the dish basket 6 from the upper surface opening 2a of washing tub 2. Then, the user puts a predetermined amount of detergent into detergent supply device 16 in washing tub 2. In the case of a dishwasher without detergent supply device 16, the user puts a predetermined amount of detergent into washing tub 2.

Next, the user pushes cleaning tub 2 into casing 1, and closes front surface opening 1a of casing 1 with door 5. At this time, the inner lid 10 is lowered by the link mechanism 11 in conjunction with the pushing-in operation of the cleaning tub 2. Thereby, sealing section 12 is compressed, and upper surface opening 2a of cleaning tank 2 is sealed.

Next, the user sets an operation program via an operation unit (not shown) connected to the control unit 17. Then, the user operates, for example, a start button (not shown) to start the washing operation of the dish washing machine. Thereby, the control unit 17 executes the washing operation based on the set operation program. That is, the control unit 17 sequentially executes the cleaning step, the rinsing step, and the drying step by the method described below.

First, the cleaning step in the cleaning operation will be described.

In the washing step, first, controller 17 opens water supply valve 4b to supply a predetermined amount of washing water to washing tub 2. When the water supply is completed, controller 17 operates detergent supply device 16 to supply detergent into washing tub 2. Then, the control unit 17 drives the washing pump 3b to pressurize and convey the washing water to the washing nozzle 3 c. Thereby, the washing water is sprayed toward the object to be washed 13 from the washing nozzle 3c disposed near the washing tub bottom 2 b. The sprayed washing water is again sucked from water accumulation unit 8 by washing pump 3b and circulated in washing tub 2. The controller 17 circulates the washing water and energizes the heater 14 to heat the washing water. At this time, control unit 17 detects the temperature of the washing water by temperature sensor 15 disposed on the wall of the bottom surface of washing tub 2. The control unit 17 controls the energization and the like of the heater 14 so that the washing water has a predetermined temperature based on the temperature information detected by the temperature sensor 15.

The washing water sprayed from the washing nozzle 3c washes dirt of the objects to be washed 13 placed on the dish basket 6. The washing water passes through the residue filter 9 and the water accumulation unit 8, and is again sucked into the washing pump 3 b. At this time, the residue contained in the washing water is captured by the residue filter 9.

Then, the washing pump 3b again pressurizes and conveys the sucked washing water, and repeats the circulation operation of supplying the washing water to the washing nozzle 3c, thereby washing the object to be washed 13. At this time, the control unit 17 performs the circulation operation of the above-described washing step for a predetermined time (for example, 30 minutes).

Then, when the circulation operation of the washing step is finished, the controller 17 rotates the washing pump 3b in the reverse direction to discharge 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. Thereby, the cleaning step is completed.

Subsequently, control unit 17 starts the rinsing step and supplies new washing water into washing tub 2. The circulation operation of the washing step and the flow of the washing water in the drain operation will be described in detail later.

In the rinsing step, the controller 17 drives the washing pump 3b in the same manner as in the washing step, and sprays the supplied new washing water toward the object to be washed 13 from the washing nozzle 3 c. Thereby, the washing agent, the residue, and the like remaining in the object to be washed 13 and the washing tub 2 are washed with the washing water. In the rinsing step, the control unit 17 repeats a plurality of times (for example, two to 3 times) a rinsing operation such as discharging of the washing water and supplying of the washing water. Thereby, the rinsing step is completed. At this time, particularly in the final rinsing operation, the controller 17 heats the washing water to a high temperature by the heater 14 to perform the heated rinsing. This heats the inside of the object to be cleaned 13 and the cleaning tank 2 to a high temperature, and promotes evaporation of the remaining moisture in the drying step.

Next, the control unit 17 executes the drying step when the rinsing step is finished.

In the drying step, control unit 17 first controls air blowing fan (not shown) and heater 14 to heat the air introduced into washing tub 2 and to discharge the wet air in washing tub 2 through a communication passage (not shown). Thereby, the object to be cleaned 13 is dried.

Then, the control unit 17 performs the drying step for a predetermined time (for example, 30 minutes). Thereby, the washing operation of the dish washing machine is ended.

The dish washing machine of the present embodiment is operated as described above.

Next, the flow of the washing water during the circulation operation of the washing step and the rinsing step of the dishwasher and during the draining operation will be described in detail.

First, the flow of the washing water in the circulation operation of the washing step will be described with reference to fig. 10. Fig. 10 is an explanatory diagram showing the flow of the washing water in the circulation operation of the washing step.

As shown in fig. 10, in the circulation operation of the washing step, the washing water flows as indicated by arrows W1, W2, and W21, for example, schematically. That is, the cleaning water flows from the cleaning tank bottom 2b to the water storage unit 8 through the residue filter 9, and is sucked into the circulation water channel 3a from the circulation water passage 3d of the 2 nd water storage unit 8b provided in the water storage unit 8. The flow of the washing water is generated by suction generated by driving the washing pump 3 b.

Specifically, a part of the washing water indicated by an arrow W1 flows into the 1 st water storage part 8a through the punched holes 9aa of the 1 st filter 9 a. The inflowing washing water thus flows into the circulation water passage 3a from the lattice-shaped circulation water passage 3 d. At this time, the residue having a diameter of 1mm or less smaller than the diameter of the punched hole 9aa is circulated through the punched hole 9aa together with the washing water.

On the other hand, the remaining washing water indicated by the arrow W2 flows into the 2 nd strainer 9b in a state of containing a residue having a size at least not capable of passing through the punched holes 9 aa. The inflowing washing water first passes through the 2 nd filter 9b from the inside to the outside as indicated by an arrow W21. At this time, large residues that cannot pass through the 2 nd filter 9b are captured in the 2 nd filter 9 b. The washing water having passed through the 2 nd filter 9b passes through the 3 rd filter 9c from the inside to the outside as indicated by an arrow W21. At this time, the residue that cannot pass through the mesh member 9d of the 3 rd filter 9c is captured in the 3 rd filter 9 c. That is, as described above, since the mesh holes of the mesh member 9d of the 3 rd strainer 9c are small, most of the residue is captured by the 3 rd strainer 9 c.

As described above, in the washing step, large residues are first captured by the 2 nd filter 9b while the washing water is repeatedly circulated. Further, even a small residue which directly flows into the circulation water passage 3a through the punched holes 9aa of the 1 st strainer 9a at the beginning of the circulation gradually flows into the 2 nd strainer 9b with time. Then, the small residue is also captured by the 3 rd filter 9c and accumulated in the 3 rd filter 9 c. That is, the control unit 17 circulates the washing water in the washing step. This gradually reduces the amount of residue contained in the washing water, and the object to be washed 13 is washed for a predetermined time.

Next, the flow of the washing water in the water discharge operation in the washing step will be described with reference to fig. 11. Fig. 11 is an explanatory diagram showing the flow of the washing water in the water discharge operation in the washing step.

As shown in fig. 11, in the water discharge operation in the washing step, the washing water flows as indicated by arrows W3, W4, W41, W42, and W5, for example. That is, the washing water flows from the washing tub bottom 2b to the water reservoir 8 through the residue filter 9, and is sucked into the drainage passage 7a from the drainage port 7c provided in the vicinity of the water reservoir bottom 8 c. The flow of the washing water is generated by suction generated by driving of the drain pump 7 b.

Specifically, a part of the washing water indicated by an arrow W3 flows into the 1 st water storage part 8a through the punched holes 9aa of the 1 st filter 9 a. The inflowing washing water thus flows directly into the 2 nd water accumulating part 8 b. The washing water passes through the entire surface of the 3 rd filter 9c from the outside to the inside. At this time, the small residue accumulated in the 3 rd strainer 9c during the circulation operation of the washing step receives a water pressure in the opposite direction to that during the circulation operation. Then, the small residue is peeled off from the mesh member 9d of the 3 rd filter 9c by the water pressure. The peeled residue is discharged from the drain port 7c to the outside of the casing 1 through the drain passage 7a together with the washing water flowing into the 3 rd strainer 9 c.

On the other hand, the remaining washing water indicated by the arrow W4 flows into the 2 nd water storage part 8b through the 2 nd filter 9 b. The inflowing washing water passes through the grid at the bottom of the 2 nd filter 9b from the inside to the outside (water collection portion bottom 8c) as indicated by an arrow 41. At this time, when large residues are accumulated in the bottom of the 2 nd filter 9b, the washing water passes through the grid on the peripheral side surface of the 2 nd filter 9b from the inside to the outside (the 3 rd filter 9c) as indicated by an arrow W42. The wash water that has passed through flows from top to bottom along the inner surface of the 3 rd strainer 9c, and helps to separate the residue accumulated in the 3 rd strainer 9 c.

As described above, during the draining operation of the washing water, the large residue is retained in the 2 nd strainer 9b while being captured in the 2 nd strainer 9 b. The small residue deposited on the inner surface of the 3 rd strainer 9c is peeled off by the washing water flowing in from the outside of the 3 rd strainer 9c, and is sucked together with the washing water from the drain port 7c through the 1 st drain passage 7aa by the drain pump 7b as indicated by an arrow W5. Then, the water is discharged to the outside of the housing 1 through the 2 nd drain passage 7ab of the drain passage unit 21 and the check valve 22. Thereby, the washing step is ended.

Next, the cleaning water and the operation of the check valve 22 during the water discharge operation in the cleaning step will be described with reference to fig. 12 to 13B.

Fig. 12 is an explanatory diagram showing a state where washing water passes through the washing pump 3b and the check valve 22 in the water discharge operation in the washing step. Fig. 13A and 13B are explanatory diagrams showing a state in which the check valve 22 operates.

In the water discharge operation, the washing water flows as indicated by arrows in fig. 12, and the residue is discharged out of the casing 1 together with the washing water. At this time, as shown in fig. 13B, the valve body 22a of the check valve 22 disposed on the downstream side of the drain pump 7B is opened by the water pressure, and the washing water and the residue are passed through the drain passage 7 a. On the other hand, when the washing pump 3b is stopped, the valve body 22a of the check valve 22 is closed by the water pressure of the washing water that attempts to flow back in the drain passage 7a, as shown in fig. 13A. This prevents the washing water remaining in the drain passage 7a without being discharged to the outside of the casing 1 from flowing backward toward the water storage unit 8.

That is, the check valve 22 prevents the reverse flow of the washing water by the opening and closing operation of the small and light valve body 22 a. Therefore, when the washing pump 3b is stopped, the residue may be caught by the valve body 22a, and dirt of the washing water may be accumulated on the drain passage 7a and the valve body 22a little by little. This may cause a failure in the opening/closing operation of the valve body 22 a. As a result, when drain pump 7b is stopped, most of the washing water remaining in drain passage 7a may flow back to water reservoir 8. Therefore, when the above-described failure occurs in the check valve 22, maintenance such as cleaning and replacement of the check valve 22 is required.

Further, the residue may block a part of the drainage passage 7a, and dirt may be accumulated on the inner wall of the drainage passage 7 a. If a problem occurs in the discharge of the cleaning water due to these factors, maintenance of the cleaning water discharge passage 7a and the like is required.

Thus, with the configuration of the present embodiment, the detachable drain passage unit 21 is disposed at the washing tub bottom 2b or the washing tub side as described above. This allows the drain passage unit 21 and the drain passage 7a to be easily disassembled from the inside of the cleaning tank 2 with a simple configuration, and the 2 nd drain passage 7ab of the drain passage 7a to be detached and cleaned.

The check valve 22 is disposed in the drain passage 7a directly in front of or behind the drain passage unit 21. Alternatively, the check valve 22 is disposed in the drain passage 7a formed in the drain passage unit 21. With this configuration, when the drain passage unit 21 is removed, the removable check valve 22 is disposed at the position where the drain passage unit 21 is removed. This allows the check valve 22 to be accessed and the check valve 22 to be easily attached and detached. As a result, it is possible to eliminate a trouble due to clogging of the check valve 22 or the like, and to clean the valve body 22a or the like with a small number of steps, and to facilitate maintenance.

As described above, the dish washing machine of the present embodiment includes: a housing 1; a cleaning tank 2 provided in the housing 1 and configured to store an object to be cleaned 13; a water accumulation part provided at the bottom 2b of the cleaning tank; a residue filter 9 detachably fixed to the water storage unit 8; a drainage passage 7a communicating the water reservoir 8 with the outside of the casing 1; and a control unit that executes a cleaning operation including a cleaning step and a rinsing step. The drain passage 7a includes a drain passage unit 21 constituting a part of the drain passage, and the drain passage unit 21 is disposed so as to be detachable from the inside of the cleaning tank 2.

With this configuration, the drain passage unit 21 can be disassembled from the inside of the cleaning tank 2 with a simple configuration. This allows easy access to the drain passage 7a, and allows elimination of defects such as clogging, and maintenance such as cleaning to be performed with a small number of steps.

In addition, as described above, in the draining operation, the draining may be performed by the natural fall of the washing water due to the gravity without using the drain pump 7 b. That is, the drain pump 7b does not have a problem such as a failure or clogging due to the natural falling of the water. However, as the drainage progresses, the washing water decreases, and the momentum of the drained washing water decreases. That is, the force of the washing water formed by the natural fall to peel off the residue from the 3 rd filter 9c is also reduced.

Therefore, as described in the above embodiment, the configuration having the drain pump 7b is more preferable. In the case of the drain pump 7b, the washing water can be discharged with a constant force. That is, even if the drainage progresses, the force of peeling the residue from the 3 rd strainer 9c does not decrease. In addition, the drainage time can be shortened.

In the present embodiment, the description has been given of the configuration of the dish washing machine having pull-out washing tub 2, but the present invention is not limited to this configuration. For example, the present invention can also be applied to a pull-out type dish washing machine as shown in fig. 14.

Thus, as an example, a pull-out type dish washing machine will be described with reference to fig. 14.

As shown in fig. 14, the pull-out dishwasher includes a washing tub 72 inside a housing 71. Door 73 is supported by support rail 74, and slides back and forth to open and close front opening 72a of cleaning tub 72. The dish basket 75 is supported by the basket rail 76, locked to the door 73, and slides in the front-rear direction. In addition, a drain unit or the like described in the dish washing machine using the above-described pull-out type washing tub 2 is disposed in a part of the drain passage. Thus, the same operation and effect as those of the dish washing machine of pull-out washing tub 2 can be obtained with the pull-out dish washing machine.

Although not shown, the same effect can be obtained by applying the configuration in which the drain unit and the like are disposed as described in the above-described dish washing machine having the pull-out washing tub 2 to a front opening type dish washing machine in which the door on the front surface is opened and closed by rotating the lower end thereof forward and downward.

As described above, the dishwasher of the present invention includes: a housing; a cleaning tank provided in the housing and configured to receive an object to be cleaned; a water accumulation part arranged at the bottom of the cleaning tank; a residue filter detachably fixed to the water storage unit; a water discharge passage for communicating the water storage part with the outside of the case; and a control unit that executes a cleaning operation including a cleaning step and a rinsing step. The drain passage includes a drain passage unit constituting a part of the drain passage, and the drain passage unit is disposed so as to be detachable from the inside of the cleaning tank.

With this configuration, the drain passage unit can be disassembled from the inside of the cleaning tank with a simple configuration. This makes it possible to easily access the drain passage and to perform maintenance such as cleaning and elimination of defects such as clogging with a small number of steps.

In the dishwasher of the present invention, the drain passage unit is preferably disposed at the bottom of the washing tub or at the side of the washing tub. With this configuration, the drain passage unit can be configured to be detachable from the inside of the cleaning tank.

In the dishwasher of the present invention, it is preferable that the check valve for preventing backflow of the drain in the drain passage into the washing tub is disposed in the drain passage, and the check valve is disposed at a position detachable by detaching the drain passage unit. With this configuration, by detaching the drain passage unit, the check valve can be easily attached and detached, and maintenance can be performed with a reduced number of steps.

In the dishwasher of the present invention, the check valve is preferably disposed in the drain passage directly in front of or behind the drain passage unit, or in the drain passage formed in the drain passage unit. With this configuration, the check valve can be easily attached and detached by detaching the drain passage unit.

Industrial applicability

The present invention can utilize the inner side of the self-cleaning tank with a simple structure to decompose the drainage channel, thereby easily approaching the drainage channel and performing the elimination of bad phenomena such as blockage, maintenance such as cleaning and the like with less man-hours, and therefore, the utility model is useful as a household tableware cleaning machine.

Claims

1. A dishwasher is characterized in that,

the dish washing machine includes:

a housing;

a cleaning tank provided in the housing and configured to store an object to be cleaned;

a water accumulation part arranged at the bottom of the cleaning tank;

a residue filter detachably fixed to the water storage unit;

a water discharge passage communicating the water reservoir with the outside of the housing; and

a control part for executing a cleaning operation including a cleaning step and a rinsing step,

the drain passage includes a drain passage unit for constituting a part of the drain passage,

the drain passage unit is configured to be detachable from the inside of the cleaning tank.

2. Dishwasher according to claim 1, characterized in that,

the drain passage unit is disposed at the bottom of the cleaning tank or at the side of the cleaning tank.

3. Dishwasher according to claim 1 or 2,

a check valve for preventing the drain water in the drain passage from flowing back into the cleaning tank is disposed in the drain passage,

the check valve is disposed at a position where the check valve can be attached and detached by detaching the drain passage unit.

4. Dishwasher according to claim 3,

the check valve is disposed in the drain passage directly in front of or behind the drain passage unit, or in the drain passage formed in the drain passage unit.