JP2003180604A - Dish washer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of the remarkable decrease in injection efficiency through increase in an opening area of the nozzles and the arm in a conventional dish washer in which the area corresponding to that for the reverse injection is additionally required in an injecting hole for rotating an arm nozzle for reversely injecting water in the direction opposite to the rotational direction so as to obtain the thrust in the rotative direction. <P>SOLUTION: The injection hole for injecting cleaning liquid or rinsing liquid in the direction which is the same direction as that of the rotation of the nozzle arm, is formed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher used in general households.

[0002]

2. Description of the Related Art In a conventional dishwasher of the type that is rotated by a reaction force of water jet from a nozzle arm, which is the mainstream, a jet port is installed in the direction opposite to the rotating direction of the nozzle arm. ing. The jet water was configured to obtain the rotational force of the nozzle arm.
Also, in a dishwasher having a washing pump rotatably installed in the center of the nozzle arm, the nozzle arm has a nozzle so that the nozzle arm sprays washing water onto a cupboard on which dishes are placed. The injection port was arranged on the upper surface of the above in a vertical direction or obliquely upward.

[0003]

However, in the conventional construction, in the dishwasher of the type which is rotated by the reaction force of the jet water from the nozzle arm, the jet hole is provided in the direction opposite to the rotating direction of the nozzle arm. Since this jet water is configured to obtain the rotational force of the nozzle arm, in order to reversely jet the water in the rotational direction and obtain the thrust in the rotational direction, the jet for rotating the arm nozzle is used. It is necessary to provide extra holes for the area of the reverse injection, which increases the opening area of the nozzle arm as a whole and significantly reduces the injection efficiency.

Further, in a dishwasher of the type that is rotated by the reaction force generated by the water sprayed from the nozzle arm, the nozzle arm is rotated only by reversely spraying water in the rotating direction and changing the rotation speed of the motor. Since it is not possible to temporarily stop the nozzle arm or rotate the nozzle arm in the reverse direction, some mechanism is required and the configuration becomes complicated,
The cost is high and the reliability is low.

Further, also in the dishwasher having the washing pump rotatably installed in the central portion of the nozzle arm, the spray holes of the nozzle arm spray the washing water to the cupboard on which the dishes are placed. In order to prevent direct contact with the heater installed between the nozzle arm and the cleaning water suction guide, the injection holes are arranged vertically or diagonally upward on the upper surface of the nozzle arm. On the partition plate surface that doubles as a guide for
There was a problem that leftovers remained, smell was generated, and cleaning was difficult.

[0006]

In order to solve the above problems, in a dishwasher having a washing pump rotatably installed in the center of the nozzle arm, the washing water is rotated in the direction of rotation of the nozzle arm. An injection hole is provided, and further,
By inclining the spray port downward by a certain angle, the cleaning water is reversely sprayed in the rotation direction (the cleaning water is sprayed in the rotation direction), and the nozzle arm and the cleaning water are sucked during the cleaning and rinsing strokes. It is possible to collect the debris that has fallen on the shikiita surface installed between the guides in the direction of rotation of the nozzle arm, and efficiently collect the debris in the filter installed in front of the cleaning tank.

At this time, the nozzle arm is changed by changing the rotational speed of the motor during the cleaning and rinsing strokes to change the balance between the force against the rotational direction due to the reverse injection and the rotational force due to the discharge water of the cleaning pump. The rotation speed of the nozzle arm can be freely controlled with a low-cost configuration by lowering the rotation speed of the nozzle, temporarily stopping it, and rotating the nozzle arm in the reverse direction. Can be improved.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the present dishwasher has a washing tank 1 for storing dishes constituting the dishwasher, a dish basket 2, a water reservoir 3, a nozzle arm 4, a brushless motor 5, a washing pump blade 6, and a drainage pump blade 7. , Two independent dishwasher units each having a seal plate 8 and the like are provided independently, two main bodies of the dishwasher units are stacked, and the two are joined to form a two-tier structure. As shown in FIG. 1, the cleaning tanks 1 are separately provided in the main body case 9 in upper and lower two stages. The cleaning tank 1 has a slide rail 24 and a roller 25.
It is equipped so that it can be pulled out.

The dishes 10 are arranged on the dish basket 2 provided in the cleaning tank 1. The cleaning liquid for cleaning the dishes 10 is supplied from the water supply valve 12 to the cleaning tank 1 through the water supply hose 13. A brushless motor 5 (electric motor) that forms the rotor 14 with a magnet (permanent magnet) is provided immediately below the bottom of the cleaning tank 1. A pump blade 6 of a cleaning pump is attached to the rotating shaft of the brushless motor 5 on the cleaning tank 1 side.

The nozzle arm 4 has a plurality of injection holes 15 for injecting the cleaning liquid on the upper side, and an opening 16 for sucking the cleaning liquid is provided at the center. The nozzle arm 4 is rotatably mounted and supported on the cleaning liquid suction guide 17 at an appropriate distance from the cleaning pump blade 6 in the opening 16. The cleaning liquid suction guide 17 extends at a constant distance from the bottom of the cleaning tank 1, has a ring-shaped cleaning liquid suction opening 18 on the outer periphery in the vicinity of the deepest portion of the cleaning tank 1, and has a nozzle arm 4 at the center. The opening 18 for discharging the cleaning liquid corresponding to the opening 16 is provided.

That is, the nozzle arm 4 is rotatably provided on the bottom side of the cleaning tank 1, and the cleaning pump blade 6 is rotatably disposed in the cleaning liquid suction opening 16 provided at the center of the nozzle arm 4. And a brushless motor 5 for driving the cleaning pump blade 6, the nozzle arm 4, the cleaning pump blade 6 and the brushless motor 5 are concentrically longitudinally arranged vertically, and the nozzle arm 4 is provided above the brushless motor 5. And the cleaning pump blades 6 are located. The bottom of the cleaning tank 1 is provided with the deepest part (collecting part) where the cleaning liquid (cleaning water) collects, around the outside of the electric motor, and the bottom of the cleaning tank 1 is inclined so as to be higher away from the collecting part. Nozzle arm 4
And a bottom of the cleaning tank 1, a cleaning liquid suction guide 17 (cleaning water suction guide) for guiding the cleaning water to the suction port side of the cleaning pump blade 6 is provided, and the outer peripheral side of the cleaning water suction guide 17 faces downward. A cleaning liquid suction opening 18 (cleaning liquid suction opening) is provided so as to extend, and the cleaning liquid suction opening 18 is arranged so as to face the water collecting portion.

When the cleaning pump is operated, the cleaning liquid suction opening 1 is formed.
The cleaning water sucked from No. 8 flows through the flow passage formed between the cleaning water suction guide 17 and the bottom of the cleaning tank 1, is sucked into the cleaning pump, and is sent to the nozzle arm 4 by the cleaning pump blade 6. The cleaning water is sprayed from the spray holes 15 into the cleaning tank 1. The tableware 10 is washed with the sprayed cleaning water.

The cleaning liquid suction guide 17 is fixed to the cleaning tank 1 by screws 19. On the rotary shaft of the brushless motor 5, a drain pump blade 7 of a drain pump is attached to the opposite side (lower end side) of the cleaning pump blade 6, and a pump chamber 21 is formed around the drain pump blade 7. The pump chamber 21 communicates with the water reservoir 3 of the cleaning tank 1 by a short water guiding portion 22. The drainage pump blade 7 is configured to have a function as a drainage pump when the cleaning pump blade 6 rotates in the direction opposite to the rotation direction for realizing the pumping action.

When the drainage pump blade 7 of the drainage pump functions as a drainage pump, the cleaning liquid after cleaning in the cleaning tank 1 is drained to the outside of the dishwasher through the drainage hose 23. During cleaning, the cleaning liquid is sucked from the vicinity of the deepest part of the cleaning tank 1 by the rotation of the brushless motor 21 and the cleaning pump blade 6 of the cleaning pump, and is guided to the opening of the cleaning liquid suction guide 17 through the cleaning liquid suction guide 17. Further, the suctioned cleaning liquid is accelerated by the cleaning pump blades 6 and further accelerated from the opening 16 of the nozzle arm 4 along the casing 26 provided in the nozzle arm 4 in the injection hole 15
Be led to.

Since the cleaning liquid is pressurized in the nozzle arm 4, it is sprayed at a high speed through the plurality of spray holes 15. The nozzle arm 4 rotates in a certain direction due to a reaction when the cleaning liquid passes through the narrow casing 26 and a reaction when the cleaning liquid is sprayed from a plurality of small spray holes 15 at a high speed.
A heater 28 is installed near the cleaning liquid suction guide 17 to heat the cleaning liquid and to heat the air blown by the fan 27 when the dishes are dried. During the cleaning process and the rinsing process, the heater 28 is energized to turn the cleaning water into warm water. The residual food collecting filter 29 is provided at the bottom of the cleaning tank 1, and collects the residual food when draining the cleaning water after cleaning. The sealing structure of the cleaning water is a hollow packing 29 around the entire upper end of the cleaning tank 1.
Further, a seal plate 8 is provided above the cleaning tank 1. The air pump 30 sends pressurized air to the hollow packing 29, and the elasticity of the expanded hollow packing 29 causes the cleaning tank 1
The seal plate 8 is always brought into contact with the seal plate 8 to realize a stable seal. A partition plate 32 is provided between the nozzle arm 4 and the cleaning liquid suction guide 17. The partition plate 32 includes one or a plurality of residual food collecting filters 33.

In the drying process of the dishes 10, the fan motor 27 is energized, the fan is rotated, and air is blown into the washing tank 1 through the air blowing path 34. At this time, the heater 28 is energized ON / OFF to change cold air to warm air,
With this warm air, the water droplets and residual water adhering to the inside of the cleaning tank 1 and the water droplets adhering to the tableware basket 2 and the tableware 3 are converted into steam, and the exhaust duct and the exhaust port 35 are used. And discharged outside the machine. Then, when the drying operation is performed for a certain period of time, the operation of the dishwasher ends.

Next, the contents of the present invention will be described with reference to FIGS.
A description will be given based on FIGS. 6 and 7. FIG. 4 is a top view showing how the nozzle arm 4 having the structure of the present invention is installed.
The nozzle arm 4 can be washed, rinsed with water, rinsed with warm water,
By rotating the cleaning pump blade 6 in the clockwise direction by driving the brushless motor 5 in the vertical cross-sectional view of the dishwasher in FIG. 1, the water in the cleaning tank 1 is sucked up from the cleaning liquid suction guide 17, and is passed through the inside of the nozzle arm 4. Then, the cleaning liquid or the rinsing water is sprayed from the partition plate cleaning spray hole 51 for pouring the spray holes 15 for cleaning the dishes 10 into the cleaning tank 1 and the residual food on the partition plate 32 into the filter 33 for collecting the residual food. The partition plate cleaning spray holes 51 are sprayed at an angle toward the partition plate 32. The nozzle arm 4 rotates in a clockwise direction, and the water jetted from the partition plate cleaning jet hole 51 is discharged in the rotation direction. Further, the partition plate cleaning / injection hole 51 is arranged on the side wall of the nozzle arm 4. FIG. 5 is a perspective view showing the attachment of the nozzle arm 4. The partition plate 32 is arranged at the center of the cleaning tank and is fixed by the partition plate pressing guide 52. The nozzle arm 4 rotates while being placed thereon. FIG. 6 is a top view of the nozzle arm 4.
The cleaning liquid or rinsing liquid that has entered from the water inlet 60 at the center of the lower surface of the nozzle arm 4 passes through the guide 50 and the side wall of the partition plate cleaning injection hole 51 of the nozzle arm 4, and hits the side wall of the partition plate cleaning injection hole 51 while The inside is filled with water, and the injection hole 15 or the partition plate cleaning injection hole 51
Is jetted from. The partition plate cleaning injection hole 5
The nozzle arm 4 rotates by hitting the side wall of 1.
The number of rotations of the nozzle arm 4 in the present invention is 2 per minute.
It is 3 to 27 rotations. FIG. 7 shows the nozzle arm 4 of the present invention.
FIG. The injection state of the cleaning liquid or the rinsing liquid in the injection hole 15 and the partition plate cleaning injection hole 51 will be described with reference to FIG. The jet holes 15 radially discharge the washing liquid and the rinsing liquid, which serve as jet water, in the upward direction, that is, for washing and rinsing dishes. The partition plate cleaning injection hole 51 is
The cleaning liquid and the rinsing liquid, which serve as jet water for rinsing the residue of the partition plate 32 in the rotating direction of the nozzle arm 4, are radially emitted.

[0019]

As described above, according to the present invention, in the drawer-type system kitchen dishwasher, the leftover food can be stored in the leftover food collection filter without leaving the leftover food on the partition plate in the washing tank. It is possible to provide customers with a system kitchen dishwasher with a pull-out system that is clean and easy to use.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main body for cleaning tableware according to an embodiment of the present invention.

FIG. 2 is a plan view of the dishwasher according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a state in which the dishwasher is pulled out according to the embodiment of the present invention.

FIG. 4 is a top view showing an installation state of nozzle arms according to the embodiment of the present invention.

FIG. 5 is a perspective view showing attachment of a nozzle arm according to another embodiment of the present invention.

FIG. 6 is a top view of a nozzle arm according to another embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a nozzle arm according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Washing tank, 2 ... Tableware basket, 3 ... Water reservoir part, 4 ... Nozzle arm, 5 ... Brushless motor, 6 ... Washing pump blade, 7
... Drainage pump blades, 8 ... Seal plate, 9 ... Main body case, 1
0 ... Tableware, 12 ... Water supply valve, 13 ... Water supply hose, 14
... rotor, 15 ... injection hole, 16 ... opening, 17 ... cleaning liquid suction guide, 18 ... cleaning liquid suction opening, 19 ... screw, 21 ... pump chamber, 22 ... water guiding part, 23 ... drainage hose, 26 ... casing , 27 ... Fan motor, 28 ... Heater, 29 ... Hollow packing, 30 ... Air pump, 3
2 ... Partition plate, 33 ... Filter for collecting residual foods, 34 ... Air flow path, 35 ... Exhaust port, 50 ... Guide, 51 ... Partition plate cleaning injection hole, 60 ... Water inlet.

Claims (5)

[Claims] 1. A dishwasher main body incorporated and housed in a space of a system kitchen unit, a washing tub for storing dishes, a cupboard provided in the washing tub and on which the dishes are placed, A water reservoir provided under the cleaning tank,
In a dishwasher having a rotatable nozzle arm provided below the cleaning tank and spraying into the cleaning tank, and a cleaning pump rotatably installed in a central portion of the nozzle arm, the rotation of the nozzle arm A dishwasher characterized by having a spray hole for spraying a cleaning liquid or a rinsing liquid in the same direction. 2. A dishwasher main body incorporated and stored in a space of a system kitchen unit, a washing tub for storing dishes, a cupboard provided in the washing tub and on which the dishes are placed, A water reservoir provided under the cleaning tank,
In a dishwasher having a rotatable nozzle arm provided below the cleaning tank and spraying into the cleaning tank, and a cleaning pump rotatably installed in a central portion of the nozzle arm, the rotation of the nozzle arm A dishwasher characterized by being provided with an injection hole for injecting a cleaning liquid or a rinsing liquid at a right angle or an angle in the direction. 3. The dishwasher according to claim 1, wherein the injection hole provided in the rotation direction of the nozzle arm is inclined downward by a certain angle. 4. The method according to claim 1, wherein the number of revolutions of the motor during the washing and rinsing strokes is changed to change the balance between the force against the rotational direction due to the reverse injection and the rotational force due to the discharge water of the washing pump. A dishwasher characterized by lowering the number of rotations of the nozzle arm, temporarily stopping it, and further rotating the nozzle arm in reverse. 5. A dishwasher according to claim 1, wherein an injection hole for injecting a cleaning liquid or a rinsing liquid is provided on a side wall of the nozzle arm in the rotating direction.