JP7117601B2 - 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. 8 is a side sectional view of a conventional dishwasher. As shown in FIG. 8, a washing tank 101 having an opening 116 for inserting and removing an object to be washed 102 such as tableware, and a washing nozzle 107 provided in the washing tank 101 for injecting washing water to the object to be washed 102. , and a cleaning pump 109 that supplies cleaning water to the cleaning nozzles 107 . Furthermore, heating means 112 for heating the object to be washed 102 , air blowing means 111 for sending air into the washing tank 101 , lid 105 for opening and closing the opening 116 , at least heating means 112 , air blowing means 111 and washing pump 109 . and a noise suppressor 120 for reducing noise affecting the control device 113 . A configuration is disclosed in which the noise suppressor 120 is covered with a sheet 119 having both insulation resistance and flame retardancy, and the sheet 119 and the noise suppressor 120 are covered with sheet metal processing members 115a and 115b ( For example, see Patent Document 1).

With this configuration, even if the noise suppressor 120 attached for noise reduction is placed in a limited place outside the washing tank 101 in the dishwasher and the distance from the sheet metal processing member becomes close, the connector of the noise suppressor 120 Insulation between the terminal 117 and the sheet metal processing member 115 can be ensured. Furthermore, it is possible to eliminate the necessity of enlarging the outer shape of the product in order to maintain an insulating distance from the noise suppressor 120 that makes the non-combustible structure within a limited space.

Also, in other drawer-type dishwashers, when the door is opened and closed during washing, water adhering to the inner lid during washing can get into the connector of the power cord and various harnesses connected to the back of the housing and the washing tank. Since it drips, the connection connector is covered with a flame-retardant cover and taped to prevent water from adhering.

Japanese Patent Publication No. 2012-000354

However, with the construction of the conventional drawer-type dishwasher, it is necessary to untie the cover from the tape and then attach and detach the connector during maintenance, which poses a problem of poor workability. In addition, if the cover is not sufficiently sealed, water may enter the connector portion, which poses a problem of reduced safety.

The present invention is intended to solve the above-mentioned conventional problems. Even if water drips from the inner lid, the case prevents water from adhering to the connector, thereby improving insulation and safety. To provide a dishwasher in which a connector can be easily accessed and inserted/extracted, and maintenance can be easily performed.

In order to solve the above conventional problems, the dishwasher of the present invention comprises a housing having a front opening on the front surface, a washing tank having an upper surface opening on the upper surface and containing an object to be washed, and an inner lid for closing the top opening of the cleaning tank accommodated, a water supply unit including a water supply valve for supplying cleaning water into the cleaning tank, a cleaning pump for pressurizing the cleaning water, a washing process and a rinsing process a power cable that supplies commercial power; a connector that connects at least one of the power cable and electrical components to the control unit; and the connector fixed to the housing. a case for containing the housing, the housing having a detachable part configured to be partially detachable, the case having a case opening on one side, the detachable part being attached to the housing and a position below the inner lid in a state in which the cleaning tank is pulled out from the housing and the inner lid is held at the upper part of the housing. , to prevent washing water from entering the case .

With this configuration, even if water drips from the inner lid, the case prevents the water from adhering to the connector, thereby improving insulation and safety. In addition, simply by removing the detachable part, the connector in the case can be accessed and inserted/extracted, which facilitates maintenance.

The dishwasher of the present invention has a washing tank that can be pulled out from the housing, and the case prevents water from adhering to the connector even if water drips from the inner lid, thereby improving insulation and safety. can improve. In addition, simply by removing the detachable part, the connector in the case can be accessed and inserted/extracted, which facilitates maintenance.

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 present embodiment FIG. 2 is a rear side perspective view of the dishwasher according to the present embodiment, 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 present embodiment. AA sectional view shown in FIG. A perspective view of a dishwasher according to another embodiment of the present invention Side sectional view of a conventional dishwasher

The dishwasher of the first invention comprises
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 including a water supply valve for supplying cleaning water into the cleaning tank; a cleaning pump for pressurizing the cleaning water; a control unit for performing a cleaning operation including a cleaning process and a rinsing process; an electric wire; a connector that connects at least one of the power supply wire and the electrical component to the control unit; and a case that is fixed to the housing and accommodates the connector, the housing having a part thereof The case has a case opening on one side, and is arranged at a position where the case opening is closed by attaching the attaching/detaching part to the housing. be.

With this configuration, even if water drips from the inner lid in the rear part of the housing, the case prevents the water from adhering to the connector, thereby improving insulation and safety. In addition, simply by removing the detachable part, the connector in the case can be accessed and inserted/extracted, which facilitates maintenance.

In the second invention, particularly in the first invention,
The housing is made of a metal material, and the case is made of a flame-retardant material or an incombustible material. With this configuration, neither the rear cover of the housing nor the case catches fire, and even if a short circuit occurs in the connector and catches fire, it is possible to prevent the spread of fire and improve safety.

A third invention is the first or second invention,
The case is configured to house electric parts 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.

A fourth invention is, particularly in any one of the first to third inventions,
The water supply valve is arranged at a position where maintenance can be performed by detaching the detachable portion. With this configuration, maintenance can be performed with a small number of man-hours even when a problem occurs in the water supply valve.

The fifth invention is particularly in any one of the first to fourth inventions,
An air break device is further provided to prevent backflow in the water supply unit,
The air break device is arranged at a position where maintenance can be performed by detaching the detachable portion. As a result, maintenance can be performed with a small number of man-hours even when a problem occurs in the air break device.

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 this embodiment. FIG. 4 is a rear perspective view of the dishwasher according to the present embodiment, 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 this embodiment 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, a washing nozzle 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 taken in and 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 back 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 unit 4, the water discharge unit, 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 due to 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 cleaning water stored in the cleaning tank 2 in the cleaning 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 washing pump 3 has a suction side communicated with a drain port 8 and circulates washing water from which residue has been removed by a residue filter 9. - 特許庁Further, the cleaning pump 3 functions as a drain pump by reversing the rotation direction of the motor during circulation, and discharges the cleaning water from the cleaning 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 in parallel 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. to 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 washing tank 2 is smoothly taken in and out.

The flexible water supply hose 18 and the flexible drainage hose 19 do not necessarily have 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 vertically and horizontally 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 so that the case opening 24a faces rearward and the stepped portion 1c is formed so as to be recessed inward above the rear surface 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 catches fire due to a short circuit or the like, it is possible to prevent the spread of fire and improve safety. 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 insulation and 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 .

As described above, the dishwasher of the present embodiment includes the housing 1 having the front opening 1a on the front surface, the washing tank 2 having the upper surface opening 2a on the upper surface and containing the object to be washed D, and the housing an inner lid 10 for closing the top opening 2a of the washing tank contained in the washing tank 1; a water supply unit 4 including a water supply valve 4b for supplying washing water into the washing tank 2; and a washing pump 3 for pressurizing the washing water. , a control unit 15 for executing a cleaning operation including a washing process and a rinsing process, a power cord 22 for supplying commercial power, and at least one of the electrical components such as the power cord 22 and the cleaning pump 3 are connected to the control unit 15. and a case 24 that is fixed to the housing 1 and accommodates the connector 23. The housing 1 has a back cover 16 that is a detachable part, a part of which is detachably configured, and the case 24 has a case opening 24a on one side, and is disposed at a position where the case opening 24a is closed when the back cover 16, which is a detachable part, is attached to the housing 1. As shown in FIG.

With this configuration, even if water drips from the inner lid 10 in the rear part of the housing 1, the case 24 prevents the water from adhering to the connector 23, thereby improving insulation and safety. In addition, the connector 23 in the case 24 can be accessed and inserted/removed simply by removing the rear cover 16, which is a detachable part, thereby facilitating maintenance.

In addition, in the dishwasher of the present embodiment, the cleaning tub 2 has been described as having a pull-out configuration, but the configuration is not limited to this. For example, it can be applied to a drawer-type dishwasher as shown in FIG. In FIG. 7, a cleaning tank 72 is configured inside a housing 71 . The door 73 is supported by support rails 74 and slides back and forth to open and close the front opening 72 a of the cleaning tank 72 . The tableware basket 75 is supported by basket rails 76 and locked to the door 73 to slide back and forth.

As described above, the dishwasher according to the present invention can improve insulation and safety by preventing water from adhering to the connector by the case even if water drips from the inner lid at the rear part of the housing. In addition, simply by removing the detachable portion, the connector in the case can be accessed and inserted/removed, which facilitates maintenance, making it useful as a household dishwasher.

1 housing 1a front opening 1b rear opening 1c step pressing part 2 washing tank 2a upper opening 3 washing pump 4 water supply part 4a water supply channel 4b water supply valve 5 door body 6 dish basket 7 washing nozzle 8 drain port 9 residue filter REFERENCE SIGNS LIST 10 inner lid 11 link mechanism 12 seal portion 13 heater 14 temperature sensor 15 control portion 16 rear lid 17 air break device 18 water supply hose 19 drainage hose 20 drainage channel 21 support portion 22 power cord 23 connector 24 case 24a case opening 24b upper surface 24c Rib 24d Through hole 71 Case 72 Cleaning tank 72a Front opening 73 Door 74 Support rail 75 Dish basket 76 Basket rail D Object to be cleaned SK System kitchen

Claims (4)

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 including a water supply valve for supplying cleaning water into the cleaning tank; a cleaning pump for pressurizing the cleaning water; a control unit for performing a cleaning operation including a cleaning process and a rinsing process; A wire, a connector that connects at least one of the power wire and the electrical component to the control unit, and a case that is fixed to the housing and accommodates the connector,
The housing includes a detachable part, a part of which is detachable,
The case has a case opening on one side, and the attachment/detachment portion is attached to the housing at a position where the case opening is closed , and the cleaning tank is pulled out from the housing and the inner lid is provided. is disposed below the inner lid in a state of being held at the upper part of the housing to prevent washing water from entering the case;
dishwasher. The housing is made of a metal material, and the case is made of a flame-retardant material or a non-combustible material,
A dishwasher according to claim 1. The water supply valve is arranged at a position where maintenance is possible by detaching the detachable portion.
A dishwasher according to claim 1 or 2. An air break device is provided in the water supply unit to prevent backflow, and the air break device is arranged at a position where maintenance can be performed by detaching the detachable portion.
A dishwasher according to any one of claims 1-3.

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