JP3539010B2 - Dishwasher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing by spraying washing water.

[0002]

2. Description of the Related Art FIG.
It will be described based on. Dishwashing basket 51 in washing tank 51
And put the detergent in to start operation. When the operation is started, first, a water supply step of supplying a predetermined amount of cleaning water to the cleaning tank 51 is executed. Subsequently, a main washing step is performed in which the washing water pressurized by the washing pump 53 and heated by the heater 54 is jetted from the washing nozzle 55 together with the detergent. The cleaning water is supplied from the injection holes 56a to 56 of the cleaning nozzle 55.
It is injected vertically or obliquely upward from f. Further, the cleaning nozzle 55 is rotated substantially horizontally by the injection reaction force. Therefore, most of the washing water is ejected at an angle in a direction opposite to the rotation direction of the washing nozzle 55 and collides with the tableware. By the action of the collision force, detergent, heat, etc. of this washing water,
The dishes are to be washed.

After a main washing step for a predetermined time, washing water containing dirt washed off from tableware or the like is then drained by a drain pump 57.
Into the drainage process to discharge to the outside of the machine. Subsequently,
A water supply step of newly supplying washing water, a rinsing step of injecting washing water from a washing nozzle 55 to rinse dishes contaminated with detergent or garbage (stain adhered to tableware is also referred to as garbage), and the drainage step Are successively repeated four times, and the operation of the cleaning process is completed. Reference numeral 58 denotes a control device that controls operations of the cleaning pump 53, the heater 54, and the like.

[0004]

However, the dishwasher having the conventional configuration has the following problems.

That is, the cleaning pump 53 and the drainage pump 57
, The volume required for these cleaning mechanisms is large. Therefore, the ratio of the washing volume that can accommodate the dishes to the entire volume of the dishwasher is small. Therefore, the maximum size, the degree of freedom for the shape, the number of tableware, and the like of the tableware that can be stored are limited, so that the tableware storage property is low.

[0006] Further, since two sets of pumps and motors for driving the pumps are required, the cost required for these related components and the assembly thereof is high.

In order to solve the above-mentioned problems, in Japanese Patent Application No. 07-229829, we performed washing and drainage with a single motor to reduce the size of the washing mechanism to increase the tableware storage capacity and reduce the cost. We propose what aimed at.

However, as shown in FIG. 7, in this configuration, the second impeller 60 for discharging drainage rotates in the direction of sucking air from the drainage channel 61 during cleaning, so that the inside of the second casing 62 is cleaned during cleaning. The air is sucked in from the drain passage 61, resulting in an air dust state, which causes an increase in noise during cleaning. Further, the suction force from the first impeller 63 and the second impeller 60 draws air into the first casing 64, so that the cleaning performance may be significantly reduced due to a reduction in pump capacity. is there. Therefore, at the time of actual use, a check valve 65 is provided in the drain passage 61,
Care must be taken to prevent air from entering the pump. However, this is not a permanent measure. That is, since wastewater containing contaminants after dishwashing constantly passes through the check valve 65, the contaminants accumulate in the check valve 65 and lose the hermeticity. Therefore, there is a problem that the cleaning performance cannot be maintained.

In addition, due to the structure of this pump, the first casing 64 on the cleaning side always passes through a state in which air is entrained by entraining air during the drainage process, so that the drainage noise becomes larger than in the conventional configuration. there were.

Further, since the suction port 66 of the second impeller 60 for drainage is located on the upper surface of the second casing 62, there is still a problem in that the amount of residual water is large.

Therefore, the present invention solves the above-mentioned problems of the conventional configuration, and can obtain a predetermined cleaning performance stably with a simple configuration that does not require a check valve or the like. to provide a tableware washer that can br /> a first object.

Further, in particular when the waste water, it is possible to waste water to low level, and the second object is to provide a tableware washer residual water is not low.

[0013]

In order to achieve the first object, in a dishwasher according to the present invention, a pump for pressurizing washing water is provided with a first impeller for washing water guided from a first suction port. wherein a first casing and out discharge failure in the washing nozzle, as well as out exhaust out of the apparatus by the second impeller swirl the washing water guided from the second suction port by the
A third centrifugal type a, which is disposed on the back surface of the second impeller,
Wash water guided from the third suction port by the impeller
A second casing for discharging a communicates with the first Keshinku and second casing and headrace, the first cable
And a sink and the washing water guide portion provided in the middle of the second casing, the third impeller during cleaning while discharging the wash water before SL washing water guide portion to the second casing , to return the cleaning water discharged into the second casing from the second suction port by the second impeller to the washing water guide portion, when drainage cleaning of the washing water guide portion
Discharging water to the second casing,
The second impeller discharges the air to the outside of the machine .

According to this configuration, a predetermined cleaning performance can be stably obtained with a simple configuration that does not require a check valve or the like, the cleaning noise is reduced, and the cleaning mechanism is reduced in size to increase the tableware storage volume. It is possible to provide an improved dishwasher.

[0015] The present invention for achieving the second object, is provided with a second suction port on a lower surface of the side wall of the second casing.

According to the present invention, it is possible to provide a dishwasher capable of draining water to a low water level, particularly at the time of drainage, and improving rinsing performance and saving water by reducing residual water.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a cleaning tank, a tableware for storing tableware, a cleaning nozzle for injecting cleaning water, and a pump for pressurizing the cleaning water by rotating a motor. The drive of the motor during cleaning and drainage
A forward and reverse inverting means for inversely inversion control, comprising a water conduit for guiding the washing water from the washing tank to the pump, with substantially provided in the vertical direction the rotation axis of the motor, the pump is first
A first casing and out discharge failure in the cleaning nozzle by a washing water guided from the suction port first impeller, the second
The suction port second impeller swirl the washing water guided from while leaving the exhaust out of the apparatus, the second of
The centrifugal third impeller disposed on the back of the impeller
The second casing for discharging the washing water guided from the third suction port , the first casing, the second casing, and a water conduit, and the first casing and the second casing .
Yes and washing water guide portion provided in the middle of the second casing
Together with the third impeller during cleaning ejects the cleaning water before SL washing water guide portion to the second casing,
It returns the cleaning water discharged into the second casing from the second suction port by the second impeller to the washing water guide portion, when the waste water the washing water of the washing water guide portion
While discharging to the second casing, the second
The centrifugal type third impeller rotates the second impeller to discharge the water from the washing water guide section to the outside .
The washing water is discharged into the casing (2) and the washing water is filled to a certain level in the second casing and the drain hose, contrary to the conventional configuration.

Further, the third impeller works so as to exhibit the drainage ability at the time of drainage. Therefore, a predetermined cleaning performance can be obtained without air entering the first impeller, and the cleaning noise can be reduced.

According to a second aspect of the present invention, in addition to the first aspect, a second suction port is provided on a lower surface of a side wall of the second casing. Yes, it has the effect of delaying the timing of air entrainment into the second impeller during drainage. Therefore, it is possible to improve the rinsing performance by reducing the residual water level and save water by reducing the number of times of rinsing.

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 shows a cross section of a dishwasher equipped with a vertical washing and drainage integrated pump, and FIG. 2 shows a cross section of a vertical washing and drainage integrated pump. 1 is a washing tank, 2 is a tableware basket for storing tableware, which is provided in the washing tank 1. Reference numeral 3 denotes a pump for pressurizing the washing water, 4 denotes a heater for heating the washing water and tableware, and 5 denotes a washing nozzle having an injection port 6 for ejecting the washing water. 7 is a filter for separating residual vegetables, 8 is a washing pump 3.
This is a control device for controlling the heater 4 and the like. The above pump 3
Are a first casing 10 for discharging cleaning water to the cleaning nozzle 5 by a centrifugal first impeller 9 and a second casing 10 for discharging cleaning water to the outside of the machine by a second impeller 11 of a vortex type. And a centrifugal third impeller 13 disposed on the back surface of the second impeller 11 for discharging washing water into the second casing 12 during washing.

A washing water guide 15 communicating with the first casing 10, the second casing 12, and a water conduit 14 provided at the bottom of the washing tank 1 in three directions is provided on both casings 1.
It has between 0 and 12. 16 is a washing water guide 15
And a first suction port 17 communicating with the first casing 10 from the washing water guide portion 15 to the second casing 12.
The second suction port 18 communicates with the washing water guide 15.
And a third suction port which communicates with the second casing 12. Reference numeral 19 denotes a motor for driving the pump 3;
This is a pole induction motor, which performs forward / reverse rotation by switching the connection between a capacitor for driving the motor 19 and a main winding and an auxiliary winding of the motor 19 by forward / reverse inversion means (not shown). In addition, the first impeller 9 and the second impeller 1
The first and third impellers 13 are mounted on the output shaft of a motor 19, and each impeller rotates in the same direction. Reference numeral 21 denotes a drainage path for discharging the cleaning water out of the machine by the pump 3.

The first impeller 9 may be of a centrifugal type, a vortex type, or of another type.

The operation of the first embodiment will be described below.
First, it is assumed that the tableware is stored in the tableware basket 2 and is attached to a predetermined position of the washing tank 1 and a switch (not shown) is turned on. When the switch is turned on to start the operation, the control device 8 first executes a water supply step of supplying a predetermined amount of cleaning water to the cleaning tank 1. Subsequently, a main washing step of injecting the washing water pressurized by the pump 3 together with the detergent from an ejection hole 6 provided in the washing nozzle 5 is executed. After the main washing process for a predetermined time,
Next, the process enters a drainage process in which washing water containing dirt washed off from tableware or the like is discharged outside the machine by the pump 3. Subsequently, a water supply step of supplying fresh washing water, a rinsing step of spraying washing water from the first washing means to rinse dishes contaminated with detergent or garbage, and a draining step are successively performed. The cleaning step is repeated.

The structure of the pump 3 and the operation in the cleaning step will be described in detail. Cleaning tank 1 and pump 3
From the washing water guide portion 15 connected to the water conduit 14 at the bottom of the first through the first suction port 16 to the first impeller 9, and simultaneously from the second suction port 15 to the second impeller 11. Communicating. In addition, the washing water guide 15 communicates with the third impeller 13 via the third suction port 18. Here, the first impeller 9 and the third impeller 1
Reference numeral 3 designates a shape which allows the second impeller 11 to suck and discharge the washing water from the washing water guide portion 15 when rotating counterclockwise, and a centrifugal pump and a vortex pump, respectively. The configuration is called. In general, a vortex-type pump is capable of switching between a discharge direction and a suction direction depending on a rotation direction.

In the main washing step and the rinsing step, the washing water is guided from the first suction port 16 of the washing water guide portion 15 to the first impeller 9 by rotating the motor 19 clockwise. Here, the first impeller 9 works effectively, and the cleaning water is discharged to the cleaning nozzle 5 to perform cleaning. On the other hand, in the same rotation direction, the second impeller 11
Is discharged from the second suction port 17. Here, the third impeller 13 discharges the cleaning water from the third suction port 18 into the second casing 12, whereby the discharged cleaning water is discharged. A part of the water is returned from the second suction port 17 to the washing water guide portion 15, and the remaining washing water remains in the drain passage 21.

Therefore, the air does not enter the first casing 10 as well as the second casing 12, and the washing water can be stably discharged to the washing nozzle 5.

The water level of the washing water remaining in the drain passage 21 is kept constant by optimizing the blade outer diameter and the blade height of the third impeller 13.

In the draining step, the washing water is guided from the second suction port 17 of the washing water guide section 15 to the second impeller 11 by rotating the motor 19 counterclockwise by the forward / reverse inverting means 20. Is done. Here, the second impeller 11 works effectively to discharge the washing water out of the machine.

On the other hand, in the same rotation direction, the first impeller 9 gradually loses the pressurizing ability as a pump as the washing water decreases due to drainage, and idles. Further, the third impeller 13, which is a centrifugal impeller, has a third
The cleaning water is discharged from the suction port 18 into the second casing 12. That is, at the time of drainage, the operation is performed to improve the drainage capacity.

Regarding the rotation direction of the motor 19, the effects of the present invention can be similarly obtained regardless of which rotation direction is used for cleaning and discharging.

As described above, in this embodiment, the second
By disposing the centrifugal third impeller on the back surface of the impeller 11, a predetermined cleaning performance can be stably obtained with a simple configuration that does not require a check valve or the like, and the cleaning noise is reduced. It is possible to obtain a dishwasher in which the storage capacity of dishes is increased by improving the drainage capacity and the size of the washing mechanism.

(Embodiment 2) FIG. 3 shows a cross section of a vertical washing / draining integrated pump. The basic structure of mechanical components is the same as that of the first embodiment shown in FIG. Omitted. 3, 4, and 5, reference numeral 30 denotes a first impeller of a centrifugal type, 31 denotes a first casing, 32 denotes a second impeller of a vortex type, 33 denotes a second casing, and 34 denotes a second impeller. 32 is a centrifugal third impeller disposed on the back surface of the second impeller 32. Further, a washing water guide 37 communicating in three directions with the first casing 31, the second casing 33, and a water conduit 36 provided at the bottom of the washing tank 35 is provided between the two casings. Reference numeral 38 denotes a first suction port communicating from the cleaning water guide 37 to the first casing 31; 39, a second suction port communicating from the cleaning water guide 37 to the second casing 33; A third suction port communicating from 37 to the second casing 33. Reference numeral 41 denotes a drainage path for discharging the washing water from the pump 42 to the outside of the machine.

A water conduit 36 for introducing washing water from the washing tank 35 to the pump is connected to the second casing 33 and the washing water guide 3.
And a second, approximately crescent-shaped, communicating with both
The suction port of the impeller 32 is provided at a lower position on the lower surface of the side wall of the second casing 33 than in the related art, which has a special effect.

The operation of the second embodiment will be described below. The basic operation relating to the cleaning step is the same as in the first embodiment. That is, the point that the rotation direction of the motor 19 is reversed in the main washing step or the rinsing step and the draining step to discharge the washing water to the washing nozzle 5 and discharge it to the outside of the machine is different from the first embodiment. Is the same.

In particular, in the draining step, the second suction port 3
The washing water is guided from 9 to the second impeller 32. Here, the second impeller 32 works effectively to discharge the washing water out of the machine. On the other hand, the first impeller 3
Numeral 0 sucks air from the injection port 6 of the cleaning nozzle 5 and idles. This air operates in the same manner as in the first embodiment, and
In the casing 31.

Therefore, the air does not enter the second casing 33 and the washing water can be drained stably. Here, by disposing the second impeller 32 of the pump below the first impeller 30, even if the first impeller 30 idles, the water can be drained to a lower water level.

By arranging the second casing 33 at the lowermost portion in this manner, drainage can be performed to an extremely low water level, residual water including dirt is reduced, and dirt due to fresh washing water is reduced in the next rinsing step. And the rinsing performance is improved. Therefore, a predetermined rinsing performance can be obtained even if the number of times of rinsing and the amount of washing water used in each rinsing step are reduced.

In addition, as the washing water level drops in the draining step, the first impeller 30 is in a state of only stirring the air completely, and the idling noise in the first casing 31 is small. At this time, by temporarily stopping the motor 19, the washing water remaining in the first casing 31 can be almost completely dripped into the washing water guide 37.
The idling noise in the first casing 31 can be easily reduced.

When the flushing water level further decreases due to the progress of the drainage process, the first casing 31 is in a state of sucking air from the flushing water guide 37, and does not discharge the flushing water. In addition, the first impeller 3
0 indicates that the air is only completely stirred, and the idling noise in the first casing 31 is small.

Also, as in the first embodiment, the water is drained to a low water level by the second impeller 32 at this time, so that the amount of remaining water is small. Further, the second suction port 39
The washing water is guided to the second impeller 32 from the
The water level at which the second impeller 32 mixes air and rotates to generate noise becomes very low, and the water level only occurs for a short time at the end of drainage.

Also, the centrifugal type can more efficiently obtain the pump output necessary for the dishwasher, especially as a cleaning pump, than the vortex type, so that the motor for driving and the cleaning mechanism can be reduced in size. That is.

[0043]

As described above, according to the first aspect of the present invention, the washing tank, the tableware for storing the tableware,
A washing nozzle for injecting washing water, a pump for pressurizing the washing water by rotation of the motor, and
A forward / reverse reversing means for controlling forward / reverse reversal at the time of drainage; and a headrace for guiding washing water from the washing tank to a pump, wherein a rotating shaft of the motor is provided in a substantially vertical direction . first casing and, outside the second swirl the washing water guided from the suction port of the second impeller to output discharge failure washing water guided from the suction port to the cleaning nozzle by a first impeller as well as out exhaust to, the
A third centrifugal type a, which is disposed on the back surface of the second impeller,
Wash water guided from the third suction port by the impeller
A second casing for discharging a communicates with the first Keshinku and second casing and headrace, the first cable
And a sink and the washing water guide portion provided in the middle of the second casing, the third impeller during cleaning while discharging the wash water before SL washing water guide portion to the second casing , to return the cleaning water discharged into the second casing from the second suction port by the second impeller to the washing water guide portion, when drainage cleaning of the washing water guide portion
Discharging water to the second casing,
Since the exhaust gas is discharged out of the apparatus by the impeller 2 , a predetermined cleaning performance can be stably obtained with a simple configuration that does not require a check valve or the like. According to the second aspect of the present invention, since the second suction port is provided on the lower surface of the side wall of the second casing, it is possible to drain water to a low water level and reduce residual water.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a dishwasher according to first and second embodiments of the present invention.

FIG. 2 is a sectional view of a main part of the pump according to the first embodiment of the present invention.

FIG. 3 is a sectional view of a pump according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a pump of the dishwasher.

FIG. 5 is a sectional view of a main part of a pump of the dishwasher.

FIG. 6 is a configuration diagram of a conventional dishwasher.

FIG. 7 is a configuration diagram of another conventional dishwasher.

[Explanation of symbols]

1 Cleaning tank 2 tableware basket 3 pump 4 heater 5 Cleaning nozzle 9, 30 First impeller 10, 31 First casing 11, 32 Second impeller 12, 33 second casing 13, 34 Third impeller 15, 37 Cleaning water guide 16, 38 First suction port 17, 39 Second suction port 18, 40 Third suction port 19 Motor 20 Forward / reverse inversion means

Continuation of the front page (56) References Japanese Utility Model Sho 62-197788 (JP, U) Japanese Utility Model Sho 47-36071 (JP, Y1) Japanese Utility Model Sho 47-5165 (JP, Y1) (58) Fields surveyed (Int .Cl. ⁷ , DB name) A47L 15/42

Claims (2)

(57) [Claims] 1. A washing tank, a tableware for storing tableware,
A washing nozzle for injecting washing water, a pump for pressurizing the washing water by rotation of the motor, and
A forward / reverse reversing means for controlling forward / reverse reversal at the time of drainage; and a headrace for guiding washing water from the washing tank to a pump, wherein a rotating shaft of the motor is provided in a substantially vertical direction . first casing and, outside the second swirl the washing water guided from the suction port of the second impeller to output discharge failure washing water guided from the suction port to the cleaning nozzle by a first impeller as well as out exhaust to, the
A third centrifugal type a, which is disposed on the back surface of the second impeller,
Wash water guided from the third suction port by the impeller
A second casing for discharging a communicates with the first Keshinku and second casing and headrace, the first cable
And a sink and the washing water guide portion provided in the middle of the second casing, the third impeller during cleaning while discharging the wash water before SL washing water guide portion to the second casing , to return the cleaning water discharged into the second casing from the second suction port by the second impeller to the washing water guide portion, when drainage cleaning of the washing water guide portion
Discharging water to the second casing,
A dishwasher that is discharged out of the machine by the impeller (2) . 2. A dishwashing machine according to claim 1, wherein providing the second suction opening on the lower surface of the side wall of the second casing.