JPH09131295A - Dish washer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washer for which washing efficiency is improved, washing noise is reduced, rotation abnormality is hardly generated, reliability is improved and dishes are easily put in and out by inexpensive and simple constitution. SOLUTION: This dish washer is provided with a washing tank, a dish basket, a washing pump, a heater and a washing nozzle 6 in a shape curved or bent so as to be projected to a rotation direction at the time of an operation provided with at least one jetting hole 7 for jetting washing water towards the dish basket in the same direction as the rotation direction at the time of the operation. Thus, by the inexpensive and simple constitution, the washing efficiency is improved, the washing noise is reduced, the rotation abnormality is hardly generated, the reliability is improved and the dishes are easily put in and out.

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 dishes by spraying washing water.

[0002]

2. Description of the Related Art A conventional dishwasher is shown in FIG.
It will be described based on.

The tableware is stored in the tableware basket 42, a detergent is put therein, and the operation is started. When the operation is started, first, a water supply step of supplying a predetermined amount of cleaning water to the cleaning tank 41 is performed. Subsequently, a main washing step is performed in which washing water pressurized by the washing pump 43 and heated by the heater 44 is jetted from the washing nozzle 45 together with the detergent. The washing water is jetted vertically or diagonally upward from the jetting holes 46 of the washing nozzle 45, and the washing nozzle 45 is rotated substantially horizontally by this jet reaction force. Therefore, most of the cleaning water is jetted at an angle opposite to the rotation direction of the cleaning nozzle 45,
Clash with tableware. The dishes are washed by the action of the collision force of the washing water, detergent, heat and the like. After the main washing process for a predetermined time, the process enters a drainage process of discharging washing water containing dirt washed from tableware and the like to the outside of the machine. Subsequently, a water supply step of newly supplying washing water, a rinsing step of spraying washing water from the washing nozzle 45 in order to rinse dishes that have been soiled with detergent or residual food (dirt on the dishes is also referred to as residual food), The washing process is completed by repeating the draining process three times in succession. Reference numeral 47 is a control device that controls the operation of the cleaning pump 43, the heater 44, and the like.

However, the locus of the injection holes 46 when the dishwasher is driven moves only concentrically as shown in FIG. 6, and therefore, depending on the position of the dish in the dish basket 42, the washing water may be washed. It also occurs when it is hard to hit or does not hit.

It has been developed that the trajectory of the cleaning nozzle is changed so that the trajectory extends over a wider range.
As shown in FIG. 7, the cleaning nozzle 45 and the cleaning nozzle 45
Is another conventional dishwasher having a second washing nozzle 48 rotatably provided on the washing nozzle 45 with its rotation axis eccentric by L2.

In this dishwasher, those having the same functions as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.
In the lower space of the dish basket 42, a cleaning nozzle 45 having a rotation radius L1 that rotates substantially horizontally, and a rotation radius L3 rotatably provided on the cleaning nozzle 45 with its rotation axis eccentric by L2. A second cleaning nozzle 48 is provided. The cleaning nozzle 45 and the second cleaning nozzle 48 have a spray hole 46 for spraying cleaning water toward the tableware of the tableware basket 42. Reference numeral 49 is a first nozzle bearing that pivotally supports the cleaning nozzle 45, and 50 is a second nozzle bearing that pivotally supports the second cleaning nozzle 48.

The operation of the dishwasher having the above structure will be described below. First, put the tableware in the table basket 4
When the water is stored in the cleaning tank 41 and mounted in a predetermined position of the cleaning tank 41 to start the operation, a water supply process of supplying a predetermined amount of cleaning water to the cleaning tank 41 is executed. Then, the first cleaning nozzle 45,
From the injection hole 46 of the second cleaning nozzle 48 to the cleaning pump 43
The main washing step of spraying the pressurized washing water with the detergent is executed. At this time, the cleaning nozzle 45 and the second cleaning nozzle 48
Are rotating in mutually opposite directions, and the dishes set in the dish basket 42 are certainly washed regardless of the setting direction. That is, a predetermined cleaning performance can be obtained.

After passing through the main washing step for a predetermined time in this manner, a draining step for discharging the wash water containing the dirt washed off from the dishes to the outside of the machine is next started. Subsequent to the drainage process, the water supply process for supplying new wash water, the rinse process for rinsing dishware soiled with detergent and leftovers by spraying the wash water from each wash nozzle, and the drainage process are continuous. And these 3
The washing process is completed by repeating the process.

[0009]

In the conventional dishwasher having the above-described structure, the trajectory of the washing water jetted from the washing nozzle 45 is constant as shown in FIG. That is, the wash water is repeatedly sprayed only on the tableware set at a specific position.
That is, in the tableware storage area constituted by the tableware basket 42 (hereinafter, referred to as a cleaning area), a cleaning area having a high cleaning effect in which the cleaning water directly collides with the tableware and a cleaning area having a low cleaning effect indirect collision. And exist.

Moreover, since the drive source for rotating the cleaning nozzle 45 is obtained by injecting the cleaning water in the direction opposite to the rotation direction during operation, a part of the cleaning water sprayed from the spray holes 46 is generated. Cleaning nozzle 45 that does not contribute to cleaning
Used only for the rotation of the. Therefore, when the injection hole 46 is clogged with foreign matter such as rice grains, the cleaning nozzle 45 cannot rotate, and there is a problem with respect to reliability, such that the cleaning performance is extremely reduced.

Further, as described above, since the drive source for rotating the cleaning nozzle 45 is obtained by injecting the cleaning water in the direction opposite to the rotation direction during operation, the direction of the dishes is changed in this direction. The arrangement of the tableware in the tableware basket is restricted so that the soiled surface comes. Therefore, deep dishes such as soup bowls and bowls are always arranged so that the dirty inner surface of the dishes comes in the direction opposite to the rotation direction of the washing nozzle. In other words, as shown in FIG. 7, since they are arranged in opposite directions in the table basket, for the user (especially left-handed), when the tableware is taken in and out, the tableware has to be replaced and installed,
There was a problem that it was difficult to put in and take out the dishes because it was necessary to use the nerve in the direction or arrangement of the dishes before putting them in.

Further, in the conventional structure, in order to obtain a predetermined cleaning power in the entire cleaning area, it is necessary to increase the cleaning power in the cleaning area having a low cleaning effect. Therefore, the primary water flow directly hitting the dishes from the injection hole 46 is required. Besides, the primary water flow is the cleaning tank 41.
It is necessary to secure a sufficient secondary water flow that collides with the table and hits the tableware. In other words, the injection pressure and the flow rate from the injection hole 46 must be increased, and the required cleaning water power of the cleaning nozzle 45 becomes excessive. Here, the washing water power means energy calculated from the jetting pressure and the flow rate of the washing water.

In this case, considering the collision sound when the washing water collides with the tableware, the larger the injection pressure and the flow rate, the larger the collision sound.
Further, when the flow rate is large, the noise of the washing water colliding with the washing tank 41 or the dropping sound thereof becomes louder, and the washing noise becomes higher.

Further, in the dishwasher having the structure in which the second cleaning nozzle 48 is provided on the first cleaning nozzle 45 developed to solve the above-mentioned problems of the conventional example, the cleaning performance is certainly improved. However, there are problems such as an increase in cost due to the addition of the second cleaning nozzle, a decrease in reliability due to an increase in the nozzle sliding portion, and an increase in leakage of cleaning water. Further, there is a problem in that the height of the washing nozzle itself in the height direction is increased, so that the height of the tableware stored in the entire dishwasher is limited.

The present invention is intended to solve the problems of the above-described conventional structure. The cleaning efficiency can be stably improved with a low cost and a simple structure, and dishes can be easily taken in and out and cleaned. It is an object of the present invention to provide a dishwasher with low noise.

[0016]

Means for achieving the object of the present invention include a washing tank, a tableware basket for storing tableware,
A cleaning pump for pressurizing the cleaning water and a cleaning nozzle for injecting the pressurized cleaning water are provided, and the cleaning nozzle has a curved or bent shape so as to project in the rotation direction during operation, and At least one injection hole for injecting washing water is provided in the same direction as the rotation direction.

According to the present invention, it is possible to provide a dishwasher in which the washing efficiency can be stably enhanced with a low cost and a simple structure, and the dishes can be easily taken in and out and the washing noise is low.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The means of the present invention comprises a washing tank, a dish basket for storing dishes, a washing pump for pressurizing washing water,
A cleaning nozzle, wherein the cleaning nozzle has a curved or bent shape so as to project in the rotational direction during operation, and has at least one injection hole for injecting cleaning water in the same direction as the rotational direction during operation. With this structure, most of the rotation torque of the cleaning nozzle can be obtained by the cleaning nozzle itself. Further, the injection hole is directed so as to be directed upward or in the rotation direction during the operation of the cleaning nozzle. That is, it is possible to provide a dishwasher that is inexpensive and has a simple structure, has a stable washing efficiency, and is easy to put in and take out dishes.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4. (Embodiment 1) FIG. 1 shows the overall configuration of an embodiment of the present invention. 1 is a washing tank, 2 is a dish basket which stores dishes and is arranged in the washing tank 1, a washing pump 3,
Cleaning is performed by receiving the spray of cleaning water pressurized and heated by the heater 4. A control device 5 controls a series of operations of the dishwasher such as water supply, washing, rinsing, draining and drying. 6 is a cleaning nozzle arranged in the lower space of the tableware basket 2, which has a curved or bent shape so as to project with respect to the rotation direction during operation, and is attached to the tableware basket 2 in the same direction as the rotation direction during operation. A plurality of spray holes 7 for spraying the cleaning water toward each other are provided. The cleaning nozzle 6 has a curved shape or a bent shape so as to project in the rotational direction, and the rotational force and the injection hole 7 obtained by the cleaning nozzle itself.
It is rotated substantially horizontally by the reaction force of the cleaning water sprayed from it, and has a shape as shown in FIG. 2 in this embodiment.

The operation of this embodiment will be described below. When the tableware is stored in the tableware basket 2, mounted in a predetermined position of the cleaning tank 1 and the operation is started, a water supply process of supplying a predetermined amount of cleaning water to the cleaning tank 1 is executed. Then, the cleaning pump 3 pressurizes the cleaning water, and the pressurized cleaning water and the detergent are sprayed from the spray holes of the cleaning nozzle 6. That is, the main washing step is executed.

After the main washing process for a predetermined time is completed, a draining process for discharging the wash water containing stains washed off from the dishes to the outside of the machine is executed. Following this drainage process,
The water supply step of newly supplying the wash water, the main washing step, the rinsing step, and the draining step are consecutive, and these steps are repeated four times to complete the washing step. As described above, the basic operation of the washing process is the same as that of the conventional dishwasher.

Since the cleaning nozzle 6 is curved or bent so as to project in the rotation direction, a force fy is generated in the nozzle rotation direction on the inner wall surface of the nozzle as shown in FIG. doing. This force fy has a magnitude expressed by the equation 1.

Fy =-(PA (sinα-sinβ) + ρQV (sinα-sinβ)) (Formula 1) P; pipe pressure, A; pipe cross-sectional area, ρ; liquid density, Q; flow rate, V; flow velocity, α: inlet angle, β: outlet angle The rotation torque F for rotating the cleaning nozzle 6 is the force fy.
Is the product of the nozzle radius L1 of the cleaning nozzle 6 and is expressed by Equation 2.

F = 2 × fy × L1 (Equation 2) As described above, according to the present embodiment, since the cleaning nozzle 6 is bent so as to project in the rotation direction, a sufficient rotation torque is obtained. Is what you can get. Therefore, the spray angle of the cleaning water set in the spray hole 7 provided in the cleaning nozzle 6 can be set so as to contribute to cleaning the dishes. That is, in the related art, it is possible to change the injection angle of the injection hole 7 in order to rotate the cleaning nozzle 6 to sacrifice the cleaning efficiency, but to set the injection angle considering only the cleaning efficiency. Is.

Further, in order to obtain a rotational torque sufficient to rotate the cleaning nozzle, a plurality of nozzles in which the injection direction of the injection hole is directed substantially in the same direction as the nozzle rotation direction are provided in the structure of the present invention. Therefore, the wash water can be sufficiently sprayed even on the back side of the tableware, which has not hitherto reached the wash water.

Further, as shown in FIG. 4, the cleaning water can be sprayed also in the nozzle rotation direction, and the degree of freedom in the arrangement of the tableware, which was limited in the cleaning water spraying direction, can be increased. It is possible to provide a tableware basket that is easy to put in and take out.

As described above, according to the present embodiment, the cleaning efficiency is high and the cleaning noise is low due to the inexpensive and simple structure.
It is possible to provide a dishwasher in which dishes can be easily taken in and out.

Further, even when foreign matter has entered the nozzle bearing, it is possible to prevent the rotation of the cleaning nozzle from being stopped or to be abnormally lowered, so that the dishwasher is highly reliable. It is possible.

In addition,

[0030]

As described above, according to the present invention, the cleaning nozzle has a curved or bent shape so as to project with respect to the rotational direction during operation, and the cleaning water is supplied in the same direction as the rotational direction during operation. By providing at least one spray hole for spraying, the cleaning nozzle itself can obtain the nozzle rotating force, and the cleaning water can be sprayed in the same direction as the nozzle rotation direction. (EN) It is possible to provide a dishwasher with high efficiency, low washing noise, high reliability in which abnormal rotation is unlikely to occur, and easy loading and unloading of dishes.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a dishwasher according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the cleaning nozzle.

FIG. 3 is a plan view showing the operation of the cleaning nozzle.

FIG. 4 is a plan view showing the tableware arrangement.

FIG. 5 is a sectional view showing the configuration of a conventional dishwasher.

FIG. 6 is a plan view of the cleaning nozzle.

FIG. 7 is a plan view of another conventional cleaning nozzle.

FIG. 8 is a plan view showing the arrangement of dishes in a conventional dishwasher.

[Explanation of symbols]

 1 Cleaning Tank 2 Dish Basket 3 Cleaning Pump 4 Heater 5 Controller 6 Cleaning Nozzle 7 Injection Hole

Claims (1)

[Claims] 1. A washing tank, a tableware for storing tableware,
A cleaning pump for pressurizing the cleaning water and a cleaning nozzle for injecting the pressurized cleaning water are provided, and the cleaning nozzle has a curved or bent shape so as to project in the rotation direction during operation, and A dishwasher having at least one spray hole for spraying wash water in the same direction as the rotation direction.