JP7108833B2 - dishwasher - Google Patents

Description

TECHNICAL FIELD The present invention relates to a dishwasher for washing dishes using wash water.

A conventional dishwasher is shown in FIG. FIG. 13 is a side cross-sectional view of a conventional front-open dishwasher. As shown in FIG. 13, the water supply hose 103 and the drain hose 113, which are pulled out from the housing 105 of the front open type dishwasher main body 101 and are connected to the water flow pipes, prevent the influence of water leakage from the connecting parts thereof. To do this, the water supply valve 104 is arranged near the water supply pipe 118 . Along with this, a water flow hose such as the water supply hose 103 and components to which it is connected are accommodated in the water guide tubular body 124 . Even if there is water leakage due to improper connection or damage to the hose, the water leakage is stopped in the water conduit 124, and when the amount of water leakage exceeds a predetermined amount, it flows into the housing 105 and is detected by the water leakage detection means. be.

With this configuration, a dishwasher is provided in which countermeasures are taken against water leakage from the water conduit, including the case where it is caused by inadequate installation work when installing the dishwasher.

Japanese Patent Publication No. 2007-202875

However, in the conventional dishwasher, the water supply hose and the water supply pipe serving as the water supply source are integrally configured. Then, the water conduit tubular body is fixed to the housing during the manufacturing stage. In this configuration, the water supply hose and the drain hose are integrated with the main body, which may interfere with the transportation and installation of the main body. In other words, there is no connecting portion between the inside and outside of the housing, and connection work in the installation work is not taken into consideration. For this reason, there is no disclosure of a configuration in which the water supply hose, the water conduit tubular body, and the drainage hose are separately provided in consideration of transportation.

The present invention solves the above-mentioned conventional problems, and has a configuration in which an external water supply hose can be connected to the outer shell of the housing. receives these leaks, prevents them from leaking outside the machine, guides them to the bottom surface of the housing and reaches the leak detection unit, and the control unit can detect leaks from the signal from the leak detection unit. intended to provide

A housing having a front opening on its front surface, a washing tank having an upper opening on its upper surface and containing an object to be washed, and an inner lid closing the upper opening of the washing tank housed in the housing. a water supply unit for supplying cleaning water into the cleaning tank; a cleaning pump for pressurizing the cleaning water; a water leakage detection unit provided on the bottom surface of the housing for detecting water leakage; a controller for executing operation, wherein the housing includes a rear surface shell and a concave shell for accommodating an external hose in a lower portion of the rear surface shell, the concave shell being formed of resin, the housing or the water leakage from the water supply portion to the bottom surface of the housing.

With this configuration, an external water supply hose can be connected to the outer shell of the housing. Furthermore, even if water leaks inside the housing or from the water supply section, the concave outer shell receives the leaked water, prevents it from leaking outside the machine, and guides it to the bottom surface of the housing. Then, the water leakage guided to the bottom surface reaches the water leakage detection unit. Thereby, the control unit can detect water leakage based on the signal from the water leakage detection unit.

The dishwasher of the present invention can be configured so that an external water supply hose can be connected to the outer shell of the housing. Furthermore, even if water leaks inside the housing or leaks from the water supply section, the concave outer shell receives the leaked water, prevents it from leaking outside the machine, and guides it to the bottom surface of the housing to detect water leakage. The control unit can detect water leakage based on the signal from the water leakage detection unit.

Schematic side cross-sectional view of a dishwasher according to Embodiment 1 of the present invention Schematic cross-sectional side view of a state in which the washing tank is pulled out from the state of the dishwasher shown in FIG. Rear perspective view of the dishwasher according to the first embodiment FIG. 2 is a rear side perspective view of the dishwasher according to Embodiment 1, with a part of the outer shell removed. FIG. 2 is a rear perspective view of the dishwasher with the back cover removed according to the first embodiment. AA sectional view shown in FIG. Rear view of the dishwasher according to Embodiment 2 of the present invention A perspective view of the inner surface of the concave outer shell on the rear surface of the dishwasher according to Embodiment 2. FIG. 11 is a perspective view of the main part of the inner surface of the concave outer shell of the dishwasher according to the second embodiment; BB sectional view shown in FIG. CC sectional view shown in FIG. FIG. 11 is a perspective view of the main part of the inner surface of the concave outer shell of the dishwasher according to the second embodiment; Side sectional view of a conventional dishwasher

The dishwasher of the first invention is
A housing having a front opening on its front surface, a washing tank having an upper opening on its upper surface and containing an object to be washed, and an inner lid closing the upper opening of the washing tank housed in the housing. a water supply unit for supplying cleaning water into the cleaning tank; a cleaning pump for pressurizing the cleaning water; a water leakage detection unit provided on the bottom surface of the housing for detecting water leakage; a controller for executing operation, wherein the housing includes a rear surface shell and a concave shell for accommodating an external hose in a lower portion of the rear surface shell, the concave shell being formed of resin, the housing or the water leakage from the water supply portion to the bottom surface of the housing.

With this configuration, an external water supply hose can be connected to the outer shell of the housing. Furthermore, even if water leaks inside the housing or from the water supply section, the concave outer shell receives the leaked water, prevents it from leaking outside the machine, and guides it to the bottom surface of the housing. Then, the water leakage guided to the bottom surface reaches the water leakage detection unit. Thereby, the control unit can detect water leakage based on the signal from the water leakage detection unit.

In the second invention, particularly in the first invention,
The concave contour has a first rib that fits outward at an upper fitting portion with the rear face contour, and a second rib that extends inward from a lower fitting portion with the bottom face contour of the housing. . With this configuration, it is possible to lead to the bottom surface of the housing without leaking water, such as washing water dripping from the inner lid or running down the inside of the rear outer shell, inside the housing.

A third invention is the first or second invention,
The water supply unit has a water supply path that guides cleaning water from an external water supply source to the cleaning tank. The concave outer shell has a first through hole through which the water supply passage passes, and the water conduit is watertightly connected to the outside of the first through hole. and a connecting portion configured to guide leaked water overflowing from the water conduit into the housing. With this configuration, water leakage guided into the housing is further guided to the bottom surface of the housing and reaches the water leakage detection section, and can be detected by the control section.

The fourth invention is, particularly in the third invention,
The first through-hole is provided so that the water supply path passes vertically, and a guiding portion for guiding inward the leaked water overflowing from the water conduit is provided on the inside of the first through-hole. With this configuration, the leaked water that overflows from the water conduit into the machine through the first through hole is guided to the inside of the housing.

The fifth invention is particularly in any one of the first to fourth inventions,
The concave outer shell has an engaging hole for a piping fixture for fixing the housed external hose, and has a third rib extending inward from the upper portion of the engaging hole. With this configuration, it is possible to prevent leaking water from leaking out of the machine through the engagement hole and guide the leaking water to the inner surface of the concave outer shell or the bottom surface of the housing.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a schematic cross-sectional side view of a dishwasher according to Embodiment 1 of the present invention. FIG. 1 shows a state in which the dishwasher is built into the system kitchen SK. FIG. 2 is a schematic cross-sectional side view of the state in which the washing tub 2 is pulled out from the state of the dishwasher shown in FIG. FIG. 3 is a rear perspective view of the dishwasher according to Embodiment 1. FIG. FIG. 4 is a rear side perspective view of the dishwasher according to Embodiment 1, with a part of the outer shell removed. The dishwasher shown in FIG. 4 has left and right side surfaces, a bottom surface, and a rear surface from which the shells have been removed.

The dishwasher of Embodiment 1 includes a housing 1, a washing tank 2, a washing pump 3, a water supply section 4, a door 5, and the like. In the following embodiments, as shown in FIG. 1, the forward direction is the direction in which the door 5 and the cleaning tank 2 are pulled out, and the rearward direction is the direction in which the cleaning tank 2 is housed and the door 5 is closed. . In addition, the installation side of the dishwasher is defined as the lower side, the opposite side is defined as the upper side, and the right side of the front of the door 5 is defined as the right side, and the left side as the left side.

The housing 1 has a front opening 1a on its front surface. The washing tank 2 includes therein a dish basket 6, washing nozzles 7, a drain port 8, a residue filter 9, and the like. The cleaning tank 2 is provided inside the housing 1 so that it can be put in and taken out in the front-rear direction. The cleaning tank 2 has an upper opening 2a on its upper surface. The upper opening 2 a is closed by an inner lid 10 arranged inside the housing 1 when the cleaning tank 2 is housed inside the housing 1 . The inner lid 10 moves up and down by a link mechanism 11 interlocking with the loading and unloading of the cleaning tank 2 . A seal portion 12 formed of a deformable hollow rubber tube is provided on the periphery of the upper opening 2a. The seal portion 12 is compressed by the inner lid 10 that descends when the cleaning tank 2 is accommodated in the housing 1 to seal the top opening 2a.

Objects D to be washed such as tableware are placed in the dish basket 6 . A door 5 is provided at the front of the cleaning tank 2 and covers the front of the housing 1 during storage. The cleaning tank 2 is taken in and out by gripping a handle 5a provided on the door 5. As shown in FIG. The water supply unit 4 includes a water supply path 4a, a water supply valve 4b, an air break device 17, a water supply hose 18, and the like. The water supply channel 4a is connected to a water pipe (not shown). The water supply valve 4 b is provided in the water supply path 4 a in the rear part of the housing 1 . When the water supply valve 4b is opened, it supplies tap water to the washing tank 2 as washing water.

The air break device 17 is installed outside the rear surface of the cleaning tank 2 . The air break device 17 is configured so that the washing water in the washing tank 2 does not run backwards into the water pipe even when the pressure in the water pipe becomes negative. The water supply hose 18 flexibly connects the washing tank 2 moving back and forth and the air break device 17 . The water supply hose 18 is made of flexible material such as silicone rubber. A rear surface of the housing 1 is provided with a large rear surface opening 1b. A rear cover 16 is provided as a detachable part that closes the rear opening 1b. By removing the back cover 16, maintenance of the water supply section 4, the drainage section, electrical components to be described later, and the like becomes possible.

The cleaning pump 3 is provided outside the bottom surface of the cleaning tank 2 . The cleaning nozzle 7 is provided inside the bottom surface of the cleaning tank 2 . The washing pump 3 pumps washing water to the washing nozzles 7 . The washing nozzle 7 jets washing water toward the objects to be washed D placed in the dish basket 6 while rotating by the reaction force of the pressure-fed washing water. That is, the cleaning pump 3 pressurizes the cleaning water stored in the cleaning tank 2 and supplies it to the cleaning nozzle 7 . The washing water sprayed from the washing nozzle 7 collides with the object to be washed to clean the object and wash the object. The washing water includes a washing liquid that contains a detergent and is sprayed onto the objects to be washed, and rinsing water for rinsing the objects to be washed.

A drain port 8 is provided at the bottom of the cleaning tank 2 . A residue filter 9 is detachably attached to the drain port 8 and collects residue washed and removed from the object to be washed. The heater 13 is arranged so as to be submerged in cleaning water that is pooled at the bottom of the cleaning tank 2 . The heater 13 heats the washing water stored in the washing tank 2 in the washing process. The heater 13 heats the drying air in the cleaning tank 2 in the drying process. A temperature sensor 14 such as a thermistor disposed outside the bottom surface of the cleaning tank 2 detects the temperature of the cleaning tank 2 .

The cleaning pump 3 has a suction side connected to a drain port 8 and circulates cleaning water from which residue has been removed by a residue filter 9. - 特許庁Further, the washing pump 3 functions as a drain pump by reversing the rotation direction of the motor during circulation, and discharges washing water from the washing tank 2 . In addition, a drainage pump may be provided independently.

The drainage section includes a drainage port 8, a drainage hose 19, a drainage channel 20, a drainage pump, and the like. The drainage channel 20 is provided side by side with the water supply channel 4 a in the rear part of the housing 1 . The drainage hose 19 flexibly connects the outlet of the cleaning pump 3 functioning as a drainage pump and the drainage channel 20 . The drain hose 19 is made of flexible material such as silicone rubber.

The water supply hose 18 and the water discharge hose 19 are arranged parallel to each other and elongated so as to draw a semicircle. These two hoses are supported by a movable support portion 21 so as to follow the back and forth movement of the cleaning tank 2 . The support portion 21 has a support piece 21a, a fixed piece 21b, and a support shaft 21c. The support piece 21 a holds the water supply hose 18 and the water discharge hose 19 . The fixed piece 21 b is fixed to the housing 1 . The support shaft 21c is connected to the fixed piece 21b so that the support piece 21a can turn around the support shaft 21c. When the washing tank 2 is pulled out, the support part 21 sends out the water supply hose 18 and the drainage hose 19 while turning forward. Further, when the washing tank 2 is housed, the support part 21 houses the water supply hose 18 and the water discharge hose 19 in a predetermined position while turning backward so that the water supply hose 18 and the water discharge hose 19 are not forcibly bent.

As a result, the support portion 21 supports the water supply hose 18 and the drainage hose 19 in a smooth turn when the cleaning tank 2 is put in and taken out, and the water supply hose 18 and the drainage hose 19 do not interfere with other parts or become unreasonable. prevent it from bending or becoming damaged or blocked. Further, the load on the water supply hose 18 and the water discharge hose 19 is suppressed, and the cleaning tank 2 is smoothly taken in and out.

The flexible water supply hose 18 and the flexible drainage hose 19 do not necessarily need to be flexible as a whole, and may be configured so that they can be bent or twisted so as not to be crushed at a predetermined portion and can be folded.

As shown in FIG. 4, the air break device 17 and the support portion 21 are provided at positions shifted in the vertical and horizontal directions so that they do not overlap when viewed from the front. A water supply path 4a, a drainage path 20, a water supply hose 18, and a drainage hose 19 are also provided so as to surround the air break device 17. As shown in FIG. As a result, the space between the cleaning tank 2 and the rear surface of the housing 1 when the cleaning tank 2 is accommodated should be sufficient to accommodate the component having the largest depth size among these components. Therefore, the dimension of the required depth space is small. As a result, the cleaning tank 2 can be enlarged in the front-rear direction with respect to the depth size of the housing 1, and the volume of the cleaning tank 2 can be increased.

A control unit 15 for executing the cleaning operation is provided inside the door 5 and outside the front surface of the cleaning tank 2 . The control unit 15 includes a washing step for washing the object D to be washed, a rinsing step for washing off the detergent and residue adhering to the object D to be washed, and a drying step for drying the object D to be washed. Control.

Next, electrical components will be described. FIG. 5 is a rear perspective view of the dishwasher with the back cover removed according to the present embodiment. 6 is a cross-sectional view taken along line AA shown in FIG. 5, which is a side cross-sectional view of the case 24. FIG.

A power cord 22 for supplying commercial power is drawn from the rear surface of the housing 1 . The power cord 22 is connected to the controller 15 via a connector 23 on the way. The connector 23 is housed in a case 24 made of a resin material that is fixed inside the rear surface of the housing 1 . A harness 25 including a plurality of electric wires is connected to the control unit 15 in order to control electric components such as the washing pump 3, the water supply valve 4b, and the heater 13. As shown in FIG. The harness 25 is arranged along the outside of the cleaning tank 2 . The harness 25 is bundled together with the water supply hose 18 and the drain hose 19 between the cleaning tank 2 and the rear surface of the housing 1 and arranged so as to be supported by the support portion 21 .

The case 24 is made of a flame-retardant resin material and is shaped like a box having a case opening 24a on one side. As flame-retardant resin materials, engineering plastics such as acrylonitrile-butadiene-styrene (ABS), polyethylene terephthalate (PET), and polyphenylene sulfide (PPS) mixed with bromine-based and phosphorus-based additives can be used. Further, a rib 24c is formed from the upper surface 24b of the case 24 to the side surface.

The case 24 is fixed by contacting the rib 24c with the case opening 24a facing rearward to the stepped portion 1c formed so as to be recessed inward above the rear opening 1b of the housing 1. . A through hole 24 d through which the power cord 22 and the harness 25 pass is provided on the lower surface of the case 24 . Since the case opening 24a faces rearward, when the back cover 16 is removed, the connector 23 of the power cord 22 and the harness 25 can be accessed from the rear for insertion and removal. This facilitates maintenance.

The back cover 16 is formed so as to close the rear opening 1b and also cover the stepped portion 1c. At this time, the case opening 24 a abuts on the back cover 16 and is closed by the back cover 16 . With this configuration, the entire surface of the case 24 is surrounded by the flame-retardant resin material and the non-flammable steel plate. As a result, neither the back cover 16 nor the case 24 catches fire, and even if the connector 23 should catch fire due to a short circuit or the like, the spread of fire can be prevented and safety is improved. Also, the case 24 can be configured to accommodate electrical components such as a noise filter. As a result, even if a problem such as a short circuit occurs in an electrical component and fire occurs, it is possible to prevent the spread of fire and improve safety.

Furthermore, the dishwasher may pause during washing and the washing tub 2 may be withdrawn. At this time, the dishwasher vibrates, and wash water drips from the inner lid 10 held at the top of the housing 1 by the link mechanism 11 into the rear space, or the dripped wash water runs along the rear surface of the housing 1. It may run down. However, due to the configuration of the case 24 described above, the case 24 prevents the washing water from entering. In addition, since the through hole 24 d is provided in the lower surface of the case 24 , the cleaning water flowing through the power cord 22 and the harness 25 is cut off, thereby preventing the cleaning water from entering the case 24 . This prevents washing water from adhering to the connector 23 and electrical parts inside the case 24, thereby improving safety.

The rear opening 1b closed by the back cover 16 is formed large in the middle of the rear surface of the housing 1. As shown in FIG. The water supply valve 4b of the water supply unit 4 is arranged at a position where maintenance can be performed by removing the back cover 16. As shown in FIG. With this configuration, maintenance can be performed with a small number of man-hours even when a problem occurs in the water supply valve 4b.

Further, the air break device 17 is provided outside the rear surface of the cleaning tank 2 and arranged at a position where maintenance can be performed by removing the back cover 16 . As a result, maintenance can be performed with a small number of man-hours even when a problem occurs in the air break device 17 .

(Embodiment 2)
A dishwasher according to Embodiment 2 of the present invention will be described. The basic configuration is the same as that of the dishwasher described in Embodiment 1, and this configuration is used.

The configuration of the lower rear surface of the housing 1 and the water leakage detection will be described. FIG. 7 is a rear view of the dishwasher according to Embodiment 2 of the present invention, showing the lower rear surface. FIG. 8 is a perspective view of the inner surface of the concave outer shell on the rear surface of the dishwasher according to Embodiment 2. FIG. FIG. 9 is a perspective view of the main part of the inner surface of the concave outer shell of the dishwasher according to Embodiment 2. FIG. FIG. 10 is a cross-sectional view taken along line BB shown in FIG. FIG. 11 is a cross-sectional view taken along line CC shown in FIG. FIG. 12 is a perspective view of the main part of the inner surface of the concave outer shell of the dishwasher according to Embodiment 2. FIG.

The housing 1 is integrally formed with the outer shells of the left and right sides and the outer shell of the bottom surface. The rear face comprises a rear face shell 1d and a concave shell 26 for housing an external hose such as the water supply channel 4a under the rear face shell 1d. The concave outer shell 26 is formed so as to be recessed inside the housing 1 using a resin material such as polypropylene (PP). This shape strengthens the reinforcement of the outer shell in which the side and bottom surfaces are integrally formed. The external hoses and power cords 22 to be housed are held by plumbing fixtures 27 .

The concave outer shell 26 is configured to guide water leakage inside the housing 1 or water leakage from the water supply unit 4 to the bottom surface 1e of the housing 1, and has ribs 28 and projections for that purpose. As described above, the water leakage inside the housing 1 is caused by the washing water dripping from the inner lid 10 into the space behind the dishwasher when the washing tank 2 is pulled out while the washing machine is temporarily stopped, or the dripping washing. Water may run down along the rear surface of the housing 1 .

The recessed outer shell 26 receives washing water dripping from above by being recessed inward. Furthermore, as a specific configuration, it has a first rib 28a that fits outward at an upper fitting portion with the rear surface outer shell 1d. It also has a second rib 28b that extends inward at the lower fitting portion with the bottom surface 1e of the housing 1. As shown in FIG. Further, an engaging hole 27a of the piping fixture 27 is provided, and an inwardly extending third rib 28c is provided above the engaging hole 27a.

In FIGS. 9 and 10, arrows W1, W2, and W3 indicate a state in which water flows down along the inside of the rear surface outer shell 1d of the housing 1 as an example of the flow of leaked water. The first rib 28a prevents water leaking inside the housing 1 from flowing down the inside of the rear outer shell 1d and guides it to the inner surface of the concave outer shell 26 as indicated by an arrow W1. The second rib 28b prevents water leaking down the inner surface of the concave outer shell 26 from leaking out of the machine, and guides it to the bottom surface 1e of the housing 1 as indicated by arrow W2. The third rib 28c prevents leakage of water from the engagement hole 27a and leads it to the inner surface of the concave outer shell 26 or the bottom surface 1e of the housing 1 as indicated by arrow W3.

At a predetermined position on the bottom surface 1e of the housing 1, a water leakage detector 29 for detecting water leakage is provided. The water leakage detector 29 is provided at a position where water leakage is guided by the inclination of the bottom surface 1e. In this manner, the water leakage guided to the bottom surface 1 e reaches the water leakage detection section 29 .

Next, the water leakage detection of the water supply path 4a will be described. The concave outer shell 26 has a through hole 30 through which the water supply channel 4a, the drainage channel 20 and the power cord 22 pass vertically. The water supply path 4a passes through the first through hole 30a. The drainage channel 20 passes through the second through hole 30b. The power cord 22 passes through the third through hole 30c.

The water supply channel 4a and the drainage channel 20 have a water supply channel connection portion 4d and a drainage channel connection portion 20a between the machine interior and the machine exterior at the respective through holes 30, respectively. Then, an external water supply hose 4c and an external drainage hose 20b are connected respectively. That is, the water supply path 4a is divided into the inside and outside of the housing 1 . The external water supply hose 4c is connected to the water supply path connection portion 4d by a worker at the time of installation. The external water supply hose 4c guides washing water from an external water supply source such as water supply to the water supply path connecting portion 4d. The first through hole 30a is formed to be larger in diameter than the water supply passage connection portion 4d, and holds the water supply passage connection portion 4d with a gap X provided by providing a holding rib.

The water supply path 4a has a water conduit 31 that covers the external water supply hose 4c. The inner diameter of the water conduit 31 is larger than the outer shape of the external water supply hose 4c, and is formed so that a space S is provided. The concave outer shell 26 has a water pipe connection portion 31a to which the water pipe 31 is watertightly connected to the outside of the first through hole 30a. The water conduit 31 is connected to the water conduit connection portion 31a by an operator during installation. The water pipe 31 is made of a flexible material and is watertightly connected by pushing it into the water pipe connecting portion 31a. It should be noted that it is desirable that the banding is performed after being fitted, so that it is more difficult to come off.

When water leakage occurs from the external water supply hose 4c or the water supply path connecting portion 4d, the water conduit 31 collects the leakage water in the space S between the external water supply hose 4c. When the water leakage exceeds the volume of the space S, it overflows into the machine from the gap X between the water supply pipe connection portion 31a and the first through hole 30a and the water supply passage connection portion 4d.

In addition, the concave outer shell 26 has a guide portion 31b formed in a semicircular belt-like protrusion shape on the inner side of the first through hole 30a. The guiding portion 31b guides the leaked water that overflows from the water pipe 31 into the inside of the machine through the first through hole 30a. In this way, overflowing water flows as indicated by arrow W4 in FIGS. 11 and 12. FIG. The overflowing water as indicated by arrow W4 is guided to the bottom surface 1e of the housing 1 by the second ribs 28b.

In this way, the concave outer shell 26 receives water dripping from the inner lid 10, water flowing down along the inside of the rear outer shell 1d of the housing 1, and water accumulated and overflowing in the water conduit 31, and is discharged outside the machine. It can be led to the bottom surface 1e of the housing 1 while preventing leakage. Then, the water leakage guided to the bottom surface 1 e reaches the water leakage detection unit 29 . Thereby, the control unit 15 can detect water leakage based on the signal from the water leakage detection unit 29 . Furthermore, if the control unit 15 is provided with an alarm function, the control unit 15 can issue an alarm to the user by means of sound and display.

As described above, the dishwasher of the present embodiment
A housing 1 having a front opening 1a on the front surface, a cleaning tank 2 having an upper opening 2a on the upper surface and containing an object to be washed D, and a washing tank housed in the housing 1 having an upper opening 2a. A closed inner lid 10, a water supply unit 4 for supplying cleaning water into the cleaning tank 2, a cleaning pump 3 for pressurizing the cleaning water, and a water leakage detection unit 29 provided on the bottom surface 1e of the housing 1 for detecting water leakage. and a control unit 15 for executing a washing operation including a washing step and a rinsing step. The housing 1 includes a rear outer shell 1d, and a concave outer shell 26 that accommodates an external water supply hose 4c and the like under the rear outer shell 1d. The concave outer shell 26 is made of resin and configured to guide water leakage inside the housing 1 or water leakage from the water supply unit 4 to the bottom surface 1 e of the housing 1 .

With this configuration, the external water supply hose 4 c can be connected to the outer shell of the housing 1 . Furthermore, even if water leaks dripping from the inner lid 10, water leaks down along the inside of the rear surface outer shell 1d of the housing 1, and water leaks accumulated in the water conduit 31 and overflows, the concave outer shell 26 prevents these water leaks. It can be received and guided to the bottom surface 1e of the housing 1 while not leaking out of the machine. Then, the water leakage guided to the bottom surface 1 e reaches the water leakage detection unit 29 . Thereby, the control unit 15 can detect water leakage based on the signal from the water leakage detection unit 29 .

As described above, in the dishwasher according to the present invention, even if water leakage occurs inside the housing or from the water supply unit, the concave outer shell receives the leakage water and prevents it from leaking outside the machine. The water is guided to the bottom surface of the housing to reach the water leakage detection section, and the control section can detect water leakage based on the signal from the water leakage detection section, so it is useful as a household dishwasher.

REFERENCE SIGNS LIST 1 housing 1a front opening 1b rear opening 1c stepped portion 1d rear outer shell 1e bottom 2 washing tank 2a upper opening 3 washing pump 4 water supply section 4a water supply channel 4b water supply valve 4c external water supply hose 4d water supply channel connector 5 door Body 6 Dish basket 7 Cleaning nozzle 8 Drain port 9 Residue filter 10 Inner lid 11 Link mechanism 12 Seal part 13 Heater 14 Temperature sensor 15 Control part 16 Back cover 17 Air break device 18 Water supply hose 19 Drainage hose 20 Drainage channel 20a Drainage channel Connecting portion 20b External drainage hose 21 Supporting portion 22 Power cord 23 Connector 24 Case 24a Case opening 24b Upper surface 24c Rib 24d Through hole 25 Harness 26 Concave outer shell 27 Piping fixture 27a Engagement hole 28 Rib 28a First rib 28b Second rib 28c 3rd rib 29 water leakage detection part 30 through hole 30a 1st through hole 30b 2nd through hole 30c 3rd through hole 31 water pipe 31a water pipe connecting part 31b guiding part D object to be cleaned S space SK system kitchen X gap

Claims (5)

A housing having a front opening on its front surface, a washing tank having an upper opening on its upper surface and containing an object to be washed, and an inner lid closing the upper opening of the washing tank housed in the housing. a water supply unit for supplying cleaning water into the cleaning tank; a cleaning pump for pressurizing the cleaning water; a water leakage detection unit provided on the bottom surface of the housing for detecting water leakage; A control unit for executing operation,
The housing includes a rear shell and a concave shell that accommodates an external hose under the rear shell,
The concave outer shell is made of resin and configured to guide water leakage inside the housing or water leakage from the water supply unit to the bottom surface of the housing.
dishwasher. The concave contour has a first rib that fits outward at an upper fitting portion with the rear face contour, and a second rib that extends inward from a lower fitting portion with the bottom face contour of the housing. ,
A dishwasher according to claim 1. The water supply unit has a water supply channel that guides cleaning water from an external water supply source to the cleaning tank,
A part of the water supply channel is accommodated in the concave outer shell as the external hose,
The external hose has an external water supply hose provided outside the housing, and a water conduit that covers the external water supply hose and receives water leakage from the external water supply hose,
The concave outer shell has a first through-hole through which the water supply passage penetrates, and a connecting portion to which the water conduit is watertightly connected to the outside of the first through-hole to prevent water leakage overflowing from the water conduit. configured to lead into the housing;
A dishwasher according to claim 1 or 2. The first through hole is provided so that the water supply path passes vertically,
A guide portion that guides inward leakage water overflowing from the water conduit is provided on the inside of the first through hole,
A dishwasher according to claim 3. The concave outer shell has an engagement hole for a piping fixture that fixes the housed external hose, and has a third rib that extends inward from the upper part of the engagement hole,
A dishwasher according to any one of claims 1-4.

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