JP2001169992A - Dishwasher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dishwasher capable of securing a large volume in a dish basket provided in two upper and lower stages and improving washing efficiency to the dish basket of the upper stage without enlarging a device. SOLUTION: This dishwasher is provided with a washing tank 3 provided with a water storage part 2, a first rotary nozzle 10 for jetting the water of the water storage part 2 from a nozzle hole 18 below a lower basket 7, a second rotary nozzle 11 for jetting the water of the water storage part 2 from the nozzle holes 28, 29 and 30 below an upper basket 9 and a water supply means 13 for supplying the water of the water storage part 2 to the rotary nozzles 10 and 11. The second rotary nozzle 11 is provided with a hollow cylindrical body 20 freely rotatably attached to the tip of a water conducting tower 19b and the hollow cylindrical body 20 is provided with the nozzle holes 31 for rotation formed so as to form a prescribed angle α with a diameter. The nozzle holes 31 are formed on two parts symmetrical to the center of the hollow cylindrical body 20. The first rotary nozzle 10 is provided with an ejection port 17 on the upper part of a rotary shaft 15 and the water conducting tower 19a is attached to the lower basket 7 and formed so as to be opened just above the ejection port 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a dishwasher for washing dishes using water stored in a water storage section.

[0002]

2. Description of the Related Art Conventionally, there has been known a dishwasher in which a washing tank for accommodating tableware has a water storage section, and water stored in the water storage section is jetted to the tableware to wash the tableware. The dishwasher includes a dish basket that can be taken in and out of the washing tank,
The tableware is placed in the tableware basket and stored in the washing tank.

[0003] The dishwasher includes a rotary nozzle provided below the dish basket when the dish basket is accommodated in the washing tank, and water stored in the water storage section. A cleaning pump for supplying to the rotating nozzle. The rotary nozzle includes a hollow rotary shaft and a hollow arm extending horizontally left and right from the rotary shaft, and introduces water supplied from the cleaning pump into the arm from the rotary shaft. It is ejected from a plurality of cleaning nozzle holes provided on the upper part of the arm. At the same time, the rotary nozzle rotates in the horizontal direction by ejecting the water from a rotary nozzle hole provided on the side of both arms. As a result, the tableware is washed by the water jetted from the rotating nozzle rotating below the tableware basket.

[0004] In the dishwasher, there is a dishwasher in which the tableware basket is provided in two upper and lower tiers in order to accommodate dishes for 5 to 6 persons. In such a dishwasher, simply providing the rotary nozzle below the lower tableware basket cannot sufficiently wash the tableware, and in particular, washing the tableware contained in the upper tableware basket is not sufficient. Will be enough.

In order to solve the above problem, Japanese Patent Application Laid-Open No.
No. 76128 discloses a dishwasher in which a first rotating nozzle is provided below a lower tableware basket and a second rotating nozzle is provided below an upper tableware basket so that each rotating nozzle rotates independently. Machine is disclosed. The first rotary nozzle includes a hollow rotary shaft and a hollow arm extending horizontally from the rotary shaft horizontally. The first rotary nozzle introduces water supplied from the cleaning pump from a hollow rotary shaft into a hollow arm, and a plurality of cleaning nozzle holes provided at an upper portion of the arm, and the lower stage is provided with a plurality of cleaning nozzle holes. At the same time as the water spouts out into the tableware stored in the tableware basket, the water is spouted out from the nozzle holes for rotation provided on the side portions of the left and right arms, and the water is rotated in the horizontal direction by the reaction force.

Further, the second rotary nozzle includes a water guide tower for guiding water supplied from the washing pump to the rotary nozzle, a hollow rotary shaft provided at an upper end of the water guide tower, It has a hollow arm extending left and right in the horizontal direction. At this time, the water guide tower of the second rotary nozzle is attached to the lower tableware basket, and discharges water supplied from the washing pump provided above the rotary shaft of the first rotary nozzle. It is provided so as to open right above the discharge port. The second rotary nozzle is provided at an upper portion of the arm portion with water introduced into the water guide tower from the discharge port and introduced into the arm portion from the water guide tower via the rotation shaft. At the same time, the water is spouted from the plurality of washing nozzle holes into the tableware accommodated in the upper tableware basket, and the water is spouted from the rotating nozzle holes provided on the side portions of both arms, and the reaction force causes the water to be horizontal. It rotates in the direction.

In the dishwasher described in the above publication, the second
Since the water guide tower of the rotary nozzle is not fixed to the first rotary nozzle, the first rotary nozzle and the second rotary nozzle can rotate independently of each other.

[0008] However, the second rotating nozzle is
Like the first rotating nozzle, the arm extending left and right from the rotating shaft is configured to rotate in the horizontal direction, and occupies a relatively large volume in the washing tank. If provided, there is an inconvenience that the volume in which tableware can be stored in the upper tableware basket is reduced.

In order to secure a sufficient volume for accommodating tableware in the upper tableware basket, instead of attaching the rotating shaft and the arm to the upper end of the water guide tower, a water guide tower fixed to the lower tableware basket is used. It is conceivable to provide a large number of holes over the entire periphery of the upper end, and to mainly wash the tableware stored in the upper tableware basket with water jetted from the holes. However, since the water guide tower is fixed to the lower tableware basket and does not rotate, an attempt is made to eject a sufficient amount of water from the many holes to wash the tableware stored in the upper tableware basket. Then, the washing pump has to be enlarged, and the dishwasher itself cannot be avoided.

[0010]

SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned disadvantages and to provide a dishwasher having two upper and lower tableware baskets with a volume as large as possible for storing tableware in the tableware baskets. It is an object of the present invention to provide a dishwasher capable of improving the washing efficiency of dishes stored in an upper tableware basket without increasing the size of the apparatus.

[0011]

In order to achieve this object, the second rotary nozzle is replaced with a hollow cylinder having arms extending left and right from the rotary shaft in a horizontal direction. It is desired that the body be rotated in the horizontal direction. However, in such a hollow cylindrical body, a rotating mechanism that replaces the rotating mechanism that jets water from a rotating nozzle hole provided on the side of the arm is required. It is said.

Therefore, the dishwasher of the present invention has a washing tank having a water storage section, a two-stage upper and lower tableware basket which can be freely inserted into and removed from the washing tank, and the tableware basket is accommodated in the washing tank. Sometimes, the water stored in the water storage portion provided so as to be located below the lower tableware basket is introduced into the hollow arm portion extending horizontally from the hollow rotary shaft and provided on the arm portion. A first rotating nozzle ejected from a plurality of nozzle holes, and a water storage unit provided to be positioned below the lower tableware basket when the tableware basket is accommodated in the washing tank, for rotating water stored in the water storage unit. The second ejecting from a plurality of nozzle holes provided in the body
Rotary nozzle, and a dishwasher including water supply means for supplying water stored in the water storage section to both rotary nozzles,
The second rotating nozzle has a water guide tower that guides water stored in the water storage part, and a hollow that is attached to a tip of the water guide tower and jets water supplied through the water guide tower from a plurality of washing nozzle holes. The hollow cylindrical body is formed obliquely across the side wall surface of the hollow cylindrical body so as to form a predetermined angle with the diameter facing the water supplied through the water guide tower. A rotating nozzle hole.

According to the dishwasher of the present invention, the water stored in the water storage section is supplied to the rotary shaft of the first rotary nozzle and the water guide tower of the second rotary nozzle by the water supply means. At this time, in the first rotary nozzle, the water supplied by the water supply means is introduced into the arm from the rotation shaft, and is ejected from a plurality of nozzle holes provided in the arm, so that the water is mainly supplied to the lower stage. Wash the tableware stored in the tableware basket.

In the second rotary nozzle, the side wall surface of the hollow cylindrical body is formed such that water supplied from the water supply means via the water guide tower forms a predetermined angle with the diameter of the hollow cylindrical body. Is spouted from a rotating nozzle hole formed obliquely across the cylinder, and a rotating force is applied to the hollow cylindrical body by a reaction force of the spouted water. Further, at this time, the water supplied by the water supply means through the water guide tower is ejected from a plurality of washing nozzle holes provided in the hollow cylindrical body, so that the water is mainly stored in the upper tableware basket. Wash dishes.

According to the dishwasher of the present invention, since the rotating nozzles rotate independently of each other, it is possible to obtain an appropriate number of rotations for washing the tableware stored in each tableware basket, and an excellent washing effect. Can be obtained. Further, the second rotary nozzle is configured such that a hollow cylindrical body attached to an upper end of the water guide tower jets water while rotating,
Unlike the first rotating nozzle, it does not have an arm extending horizontally from the rotating shaft to the left and right. Therefore, according to the dishwasher of the present invention, the second rotating nozzle does not occupy a large volume in the washing tank, and a sufficient volume for accommodating tableware in the upper table basket can be ensured.

Further, since the second rotary nozzle is configured to eject water while rotating the hollow cylindrical body, the second cylindrical nozzle is provided with a cleaning nozzle hole provided in the hollow cylindrical body, so that the hollow cylindrical body has a cleaning nozzle hole. Water can be squirted all around the body. Therefore, a large number of nozzle holes and a large-sized water supply means are not required in order to secure a sufficient amount of water for washing the dishes, and it is possible to avoid an increase in the size of the entire dishwasher.

In the dishwasher according to the present invention, the hollow nozzle is provided at two locations symmetrical to each other with respect to the center of the hollow cylinder. It can rotate stably.

The second rotary nozzle may be provided integrally with the first rotary nozzle, or may be provided separately. However, when the second rotary nozzle is provided integrally with the first rotary nozzle, In order to prevent the lower table basket from contacting the water guide tower of the second rotary nozzle when the lower table basket is accommodated in the washing tank, it is necessary to form an escape portion in the table basket. However, when the relief portion is formed, the portion behind the water guide tower cannot be used as a volume for accommodating tableware.

Therefore, the dishwasher of the present invention comprises the first dishwasher.
Is provided with a discharge port for discharging water supplied from the water supply means above the rotary shaft, and the water guide tower of the second rotary nozzle is attached to a tableware basket at a lower stage and is directly above the discharge port. It is characterized by being provided so as to be opened. According to this configuration, since the water guide tower is attached to the lower tableware basket, there is no need to provide a relief portion for avoiding contact with the water guide tower in the tableware basket, and the tableware is provided behind the water guide tower. Can be secured. Also,
In the dishwasher having the above-described configuration, the water supplied by the water supply unit is discharged upward from the discharge port of the rotating shaft, and is introduced into the water guide tower that is opened immediately above the discharge port. You.

[0020]

Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a side view of the dishwasher of the present embodiment, FIG. 2 is a longitudinal sectional view of both rotating nozzles shown in FIG. 1, FIG. 3 is a perspective view of the rotating body shown in FIG. 1, and FIG. FIG. 5 is a plan view of the rotating body of FIG.
FIG. 5 is a sectional view taken along line VV of FIG. 4.

As shown in FIG. 1, the dishwasher 1 of the present embodiment can be taken in and out by opening and closing a washing tank 3 having a water storage unit 2 and a door 4 provided on the front surface of the washing tank 3. Tableware basket 5 is provided. The tableware basket 5 is composed of a wire material in which a metal material such as iron is coated with a nylon resin is vertically and horizontally combined, and is provided with a lower basket 7 having a plurality of wheels 6 on both side surfaces, and standing on the lower basket 7. An upper basket 9 rotatably provided on the upper part of the support 8 is provided in two stages,
By being moved back and forth on a rail (not shown) by the wheels 6, the door 6 is pulled out onto the door 4 or stored in the cleaning tank 3.

The washing tank 3 includes a first rotating nozzle 10 located below the lower basket 7 when the tableware basket 5 is stored, and a second rotating nozzle 11 located between the lower basket 7 and the upper basket 9.
And In the lower part of the washing tank 3, the water stored in the water storage unit 2 is supplied to both rotating nozzles 1 through a garbage filter 12.
A washing pump 13 for supplying to 0 and 11 is provided.
Reference numeral 14 denotes an electric heater for heating the water stored in the water storage unit 2 and the inside of the cleaning tank 3.

As shown in FIGS. 1 and 2, the first rotary nozzle 10 comprises a hollow rotary shaft 15 and a hollow arm 16 extending horizontally from the rotary shaft 15 to the left and right. In addition to a discharge port 17 at the top of the nozzle 15, a plurality of cleaning nozzle holes 18 are provided at the top of the arm 16. The left and right arms 16 have a rotation nozzle hole (not shown) on the side.

As shown in FIGS. 1 to 4, the second rotary nozzle 11 is attached to the lower cage 7 and has a hollow lower water tower 19 a which is opened just above the discharge port 17, and is screwed into the lower water tower 19 a. The combined hollow upper water tower 19b and the upper water tower 19
b, and comprises a hollow cylindrical body 20 located between the lower cage 7 and the upper cage 9. Lower water tower 19
In a, the lower end is supported by the lower cage 7 by a support member (not shown), and the wire W of the lower cage 7 provided in the groove 21 provided at the upper end is provided below the upper water tower 19b. The lower cage 7 is attached to the lower cage 7 by being sandwiched between the lower cage 7 and the flange portion 22. Further, the upper water conveyance tower 19b has a plurality of vertically elongated slit portions 23 on the upper portion, and the slit portion 2
3 and the hollow portion of the upper water tower 19b and the hollow cylindrical body 20
Is communicated with the inside. The hollow cylindrical body 20 has a screw 27 inserted into a communication hole 25 formed in the center of the top surface 24 and screwed to an insert nut 26 attached to the upper end of the upper water guide tower 19b, and an insert nut 26. To be rotatable, and the cleaning nozzle holes 28,
29 and 30 and a nozzle hole 31 for rotation.

Next, the positions and shapes of the nozzle holes 28, 29, 30, 31 will be described with reference to FIGS.

First, the cleaning nozzle hole 28 is formed at two adjacent positions near the outer periphery of a curved surface 33 connecting the top surface 24 and the side surface 32 of the hollow cylindrical body 20, and the cleaning nozzle hole 29 is a curved surface. The cleaning nozzle hole 30 is formed at one location from the top surface 24 to the side surface 32 through the curved surface 33 along the radius of the hollow cylindrical body 20. Nozzle holes 28, 28, 29, 3
0 indicates that the hollow cylindrical body 2 is not rotated so that the rotation of the hollow cylindrical body 20 by the rotation nozzle hole 31 described later does not become unstable.
They are arranged at equal intervals along the outer circumference of 0 at intervals of 90 °. In addition, the nozzle holes 28 and 29 are formed to have a size of at least 3 mm square, preferably 5 mm square so as not to block rice grains and the like of residual vegetables.

Next, the nozzle hole 31 for rotation is
It is provided at a position symmetrical with respect to the center of the top surface 24 at two positions, that is, the middle of the curved surface 33 and the middle of the nozzle holes 29 and 30. It is formed vertically long along the axial direction of the cylindrical body 20. Further, as shown in FIG. 4, the nozzle hole 31 for rotation rotates the hollow cylindrical body 20 so that the direction of jetting water on the side surface 32 forms a predetermined angle α with respect to the diameter of the hollow cylindrical body 20. It is formed diagonally across the wall.

Next, the operation of the dishwasher 1 will be described.

In the dishwasher 1, the door 4 is first opened, the tableware basket 5 is pulled out onto the door 4, and the tableware is stored in the lower basket 7 and the upper basket 9. In the dishwasher 1, a relatively large tableware such as a platter A and a bowl and a small container C for storing a fork B, a spoon and chopsticks are stored in a lower basket 7, and an upper basket 9 is provided.
Accommodates relatively small dishes such as cups D, cups, small plates E, and the like. And a tableware basket 5 containing the tableware.
Is stored in the washing tank 3 and the detergent is put therein, and then the door 4 is closed.

The dishwasher 1 has a structure in which the inside of the washing tank 3 is closed when the door 4 is closed, and the washing operation is started when the user turns on the operation start / stop switch. When the cleaning operation is started, water is started to be supplied into the cleaning tank 3 from a water supply pipe (not shown) via an on-off valve such as an electromagnetic valve, and a predetermined amount of water is stored in the water storage unit 2. next,
The water stored in the water storage unit 2 is heated to a predetermined temperature by the electric heater 14, and the water filtered by the garbage filter 12 is supplied to the first rotary nozzle 10 by the cleaning pump 13.

A part of the water supplied to the first rotating nozzle 10 is introduced from the rotating shaft 15 to the arm 16. The water introduced into the arm 16 is spouted horizontally from a rotation nozzle hole (not shown) provided on the side, and the reaction force of the water causes the arm 16 to rotate.
Is rotated in the horizontal direction, and is spouted upward from a cleaning nozzle hole 18 provided at the upper portion to wash the tableware stored in the tableware basket 5.

The other part of the water supplied to the first rotary nozzle 10 is supplied to the discharge port 1 provided above the rotary shaft 15.
7, and is supplied to the lower water tower 19 a of the second rotary nozzle that opens right above the discharge port 17. Lower water tower 1
The water supplied to the nozzle 9a is jetted out of the slit 23 of the upper water guide tower 19b into the hollow cylindrical body 20, and further, the cleaning nozzle holes 28, 29, 30 and the rotating nozzle holes 31 of the hollow cylindrical body 20 are formed. Erupts from

At this time, since the direction of water jet on the side surface 32 forms a predetermined angle α with respect to the diameter of the hollow cylindrical body 20 as shown by an arrow in FIG. The hollow cylindrical body 20 is rotated in the horizontal direction about the screw 27 by the reaction force of the water jetted from the hole 31. The hollow cylindrical body 20 can rotate stably because the nozzle holes 31 are provided at two positions symmetrical to each other on the side surface 32 as described above.

The angle α is preferably in the range of 45 to 90 ° in order to rotate the hollow cylindrical body 20 efficiently by the reaction force of the water jetted from the nozzle hole 31.
If the angle α is less than 45 °, a sufficient rotation torque cannot be obtained. Further, as the angle α approaches 90 °, the rotation of the hollow cylindrical body 20 becomes faster, but the water ejected from the nozzle hole 31 is diffused in a wide range, and the torque required for the rotation can be stably obtained. May not be possible. Therefore, it is optimal that the angle α is 45 °.

The hollow cylindrical body 20 comprises a lower cage 7 and an upper cage 9
And the cleaning nozzle holes 28, 29,
The tableware mainly stored in the upper basket 9 is washed by the water spouted from 30. The water spouted from the nozzle holes 28, 29, and 30 spreads radially, and the water spouted from the nozzle 28 cleans the tableware stored in the upper basket 9 on the outer peripheral side of the shaft of the hollow cylindrical body 20. The tableware stored in the upper basket 9 immediately above the axis of the hollow cylindrical body 20 and near the axis is washed by the water jetted from the holes 29. Further, the entire tableware stored in the upper basket 9 is washed from the portion immediately above the axis of the hollow cylindrical body 20 to the outer peripheral portion by the water jetted from the nozzle holes 30. Further, the ceiling 3a of the cleaning tank 3 is
As shown in the figure, the water squirted from the nozzle holes 28, 29, and 30 is reflected by the ceiling 3a, and the nozzle holes on the back surface of the cup D and the small dish E are formed, since the water has a shape bulging downward toward the center. The part which is hardly directly hit by water jetted from 28, 29, 30 is washed.

At this time, similarly to the nozzle hole 31, the blowing direction of the side surface 32 of the nozzle hole 30 forms a predetermined angle β with respect to the diameter of the hollow cylindrical body 20, as shown by the arrow in FIG. Accordingly, the rotation of the hollow cylindrical body 20 can be assisted by the reaction force of the water jetted from the nozzle holes 30. If the angle β exceeds 30 °, the water spouting from the nozzle holes 30 becomes less likely to hit the tableware stored in the upper basket 9, so that the angle β is preferably 30 ° or less.

The water spouted from the nozzle hole 31 imparts a rotational force to the hollow cylindrical body 20 as described above, and the tableware, especially the small container C, stored in the lower basket 7 is provided.
It is also used for cleaning the fork B, spoon, chopsticks and the like stored in the hopper.

In the dishwasher 1, when a predetermined time has elapsed after the start of the washing operation, the operation of the washing pump 13 and the electric heater 14 is stopped, and the drain pump (not shown) is operated to activate the water in the water storage section 2. Is discharged through the garbage filter 12, and the washing operation is terminated.

Next, the dishwasher 1 performs a rinsing operation of the tableware stored in the tableware basket 5 by repeating the same processing as the washing operation several times. In the final rinsing, in order to sterilize the tableware, the water in the water storage unit 2 is heated to, for example, 70 ° C. by the electric heater 14 to rinse the tableware at a high temperature.

When the rinsing operation has been completed, the dishwasher 1 activates the electric heater 14 to raise the temperature in the washing tank 3 and also activates a drying fan (not shown) so that the tableware stored in the dish basket 5 can be operated. A drying operation is performed in which hot air is blown on the substrate to dry it. Then, in the dishwasher 1, all the steps of washing are completed by the end of the drying operation.

In the dishwasher 1, the second rotating nozzle 1
Since the one hollow cylindrical body 20 is attached by the screw 27, it can be easily removed and cleaned by turning the screw 27. The second rotating nozzle 11 is provided in the lower water conveyance tower 1.
Since the hollow cylindrical body 20 is attached to the lower basket 7 and moves forward and backward together with the lower basket 7, the removal and cleaning of the hollow cylindrical body 20 can be performed when the tableware basket 5 is removed from the washing tank 3.

[Brief description of the drawings]

FIG. 1 is a side view of a dishwasher according to the present invention.

FIG. 2 is a longitudinal sectional view of the two rotary nozzles shown in FIG.

FIG. 3 is a perspective view of the hollow cylindrical body shown in FIG. 1;

FIG. 4 is a plan view of the hollow cylindrical body shown in FIG. 1;

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

1 ... Dishwasher, 2 ... Reservoir, 3 ... Washing tank, 5 ...
Tableware basket 7 Lower tableware basket 9 Upper tableware basket 10 First rotating nozzle 11 Second rotating nozzle 13 Water supply means 15 Rotating shaft 16 Arms 17 Discharge port 18 Cleaning nozzle hole 19
a, 19b: water transmission tower, 20: hollow cylindrical body, 28,
29, 30: Nozzle hole for cleaning, 31: Nozzle hole for rotation.

Claims (3)

[Claims] 1. A washing tub having a water storage portion, an upper and lower tableware basket provided so as to be able to be taken in and out of the washing tank, and a lower portion of the lower tableware basket when the tableware basket is stored in the washing tank. The water stored in the water storage portion provided so as to be introduced into a hollow arm portion extending horizontally from a hollow rotation shaft and ejected from a plurality of nozzle holes provided in the arm portion. 1
And a plurality of nozzle holes provided to be located below the upper table basket when the table basket is stored in the washing tank, and a plurality of nozzle holes provided in the rotating body for storing water stored in the water storage section. In a dishwasher provided with a second rotary nozzle spouting from the nozzle and water supply means for supplying the water stored in the water storage section to both rotary nozzles, the second rotary nozzle is provided with water stored in the water storage section. And a hollow cylindrical body rotatably attached to the tip of the water guide tower and supplying water supplied through the water tower from a plurality of washing nozzle holes. Is characterized by having a rotating nozzle hole formed obliquely across the side wall surface of the hollow cylindrical body so as to form a predetermined angle with the diameter facing the water supplied through the water guide tower. Dishwasher. 2. The dishwasher according to claim 1, wherein said rotary nozzle holes are provided at two locations symmetrical with respect to the center of said hollow cylindrical body. 3. The first rotary nozzle has a discharge port for discharging water supplied from the water supply means above the rotary shaft, and the water guide tower of the second rotary nozzle is provided in a lower tableware basket. The dishwasher according to claim 1 or 2, wherein the dishwasher is provided so as to be worn and open immediately above the discharge port.