JP3334210B2 - 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, and more particularly to improving washing efficiency.

[0002]

2. Description of the Related Art A general operation method of a conventional dishwasher will be described below with reference to FIG. When the tableware is stored in the washing tub 1 vertically in multiple stages by the upper and lower tableware baskets 2 and 3 and the detergent is added and the operation is started, first, a water supply step of supplying a predetermined amount of washing water to the washing tub 1 is performed. Then, a main washing step of spraying washing water pressurized by the washing pump 4 from the washing nozzles 5 and 6 together with the detergent is performed. The washing water is jetted vertically or obliquely upward from the jet port of the washing nozzle, and the washing nozzles 5 and 6 rotate substantially horizontally by the jet reaction force. Therefore, most of the washing water is ejected while being inclined in the direction opposite to the rotation direction of the washing nozzle and collides with the tableware. The dishwashing dirt is cleaned by the action of the collision force of the cleaning water, detergent, heat and the like.

[0003] After a main washing step for a predetermined time, a draining step for discharging washing water containing dirt washed off from tableware or the like to the outside of the machine is next performed. Subsequently, a water supply step of supplying new washing water, a rinsing step of rinsing dishware contaminated with detergent or garbage by spraying the washing water from a washing nozzle, and a draining step are repeated several times in succession. To complete the cleaning process.

Reference numeral 7 denotes a heater for heating the cleaning water, and reference numeral 8 denotes a control device for controlling the operation of the cleaning pump 4, the heater 7, and the like.

[0005]

However, in the above-mentioned dishwasher, since the washing nozzles 5 and 6 are arm nozzles which rotate around a single rotation axis, the rotation locus of the injection port provided thereat. In other words, the ejection trajectory of the washing water from the ejection port is a plurality of concentric circles equal to the number of the ejection ports, and the washing water is repeatedly ejected to a specific position on the tableware, and the washing water uniformly collides with every corner of the tableware. Its cleaning efficiency is low. In other words, the uniform cleaning property of the entire space (hereinafter simply referred to as a cleaning area) formed by objects to be cleaned such as a tableware basket and tableware is low, that is, cleaning unevenness is large,
In order to eliminate this, a large number of spray ports are required, and the flow rate of the spray cleaning water from the cleaning nozzles 5 and 6 is extremely large, so that the required cleaning water power is excessive (hereinafter, the discharge pressure and flow rate of the cleaning water). The power calculated from the above is called washing water power). As a result, the cleaning pump 4 needs to have a large capacity. At the same time, there is a problem that the operation noise and the sound of collision or dripping of the washing water with a large flow rate into the washing tank 1 increase, resulting in an increase in washing noise.

Further, as described above, in the conventional arm nozzle configuration, not only is it easy to cause uneven cleaning of the dishes in the upper and lower tableware baskets, but also during the rinsing, the contaminants once dropped on the backside of the dishes are re-used. There was a problem that it was easily contaminated. Further, in the conventional tableware basket, the tableware can generally be set upside down (especially for dishes). However, the spray trajectory and the spray direction of the wash water from the conventional upper and lower arm nozzles are constant, and the setting state of the tableware is opposite to the arrangement in which the wash water is reliably sprayed on the tableware relative to the nozzle rotation direction, That is, there is a problem that when set in the direction opposite to the normal arrangement, the cleaning power is extremely reduced.

In order to solve these problems, the present inventors have already proposed (pending) a dishwasher having a washing nozzle configuration as shown in FIG. The improvement of the cleaning efficiency due to the uniformity of the cleaning has enabled the miniaturization of the cleaning pump and the reduction of the cleaning noise. That is, the third washing nozzle 9 is provided such that the rotation axis thereof is eccentric by a fixed distance from the washing nozzle 6 and is rotatable on the washing nozzle, and the lower washing basket 3 is provided by the uniform washing action of the third washing nozzle 7. The washing efficiency of the tableware has been greatly improved.

However, in the configuration of the present proposal,
The improvement in cleaning efficiency is limited to the dishes in the lower tableware basket, the cleaning efficiency of the dishes in the upper tableware basket is not improved, and the cleaning power for strongly contaminated dishes is inferior to that of the lower tableware basket. In addition to the limitations, it was not possible to completely improve the washing efficiency of all dishes.

[0009] The present invention solves the above problems, and by rationally configuring three arm nozzles,
To provide a dishwasher with extremely high washing efficiency, which can improve uniform washing of all dishes in the upper and lower dish baskets, reliably obtain high washing power with low washing water power, and realize low noise. As a first object.

It is a second object of the present invention to provide an easy-to-use dishwasher capable of preventing reattachment to the backside of tableware and constantly obtaining a high cleaning power regardless of the setting direction of the tableware.

[0011]

In order to achieve the first object, a dishwasher according to the present invention comprises a first horizontally rotating arm nozzle provided in a lower space of an upper tableware basket, and a lower tableware. A second arm nozzle provided in a lower space of the car;
Wherein the first arm nozzle and a third arm nozzles rotation axis is rotatably provided at a certain distance eccentrically and on the first arm nozzle, the first Amunozu
And the third arm nozzle are located below the upper tableware basket.
The third arm nozzle is provided in a space, and the third arm nozzle has an injection port on both upper and lower surfaces thereof.

According to a second aspect of the present invention, there is provided a dishwasher according to the present invention, wherein the third arm nozzle is configured to rotate in a reverse direction to the first or second arm nozzle. It is.

[0013]

The dishwasher of the present invention has the first configuration described above.
The injection trajectory of the third arm nozzle that sprays and cleans the upper and lower regions at the same time is randomized, so that the upper and lower tableware baskets are simultaneously more uniformly washed. Therefore, the cleaning efficiency is greatly improved, and a predetermined cleaning power can be obtained with extremely small cleaning water power.

According to the above-mentioned second configuration, in addition to the uniform cleaning performance for the upper and lower cleaning areas, the direction of rotation of the third arm nozzle is reversed from that of the first or second arm nozzle, thereby enabling the tableware to be used. Cleaning water is sprayed on both the front and back sides of the tableware to efficiently wash and reliably prevent recontamination on the backside of tableware. At the same time, the washing water is reliably sprayed onto the contaminated surface of the dish, regardless of the setting direction of the dish, so that a high washing power can be obtained.

[0015]

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a washing tank, reference numerals 2 and 3 denote an upper tableware basket and a lower tableware basket for vertically storing tableware in the washing tank 1, reference numeral 4 denotes a cleaning pump for pressurizing and circulating cleaning water, and reference numeral 7 denotes a cleaning pump. A heater 8 for heating the washing water is a control device for controlling the operation of the washing pump 4, the heater 7, and the like. These are the same as the configurations in FIGS. Reference numeral 10 denotes a first arm nozzle which is provided in a lower space of the upper tableware basket 2 and rotates substantially horizontally while spraying washing water toward the upper tableware basket 2, and 11 is provided in a lower space of the lower tableware basket 3 and rotates substantially horizontally The second arm nozzle 12 has a rotation axis that is eccentric to the first arm nozzle 10 by a predetermined distance and
Is a third arm nozzle that is rotatable on the arm nozzle 10. The arm nozzle 12 has a plurality of injection ports 12 a, 12 b, which inject cleaning water toward the dishes of the upper and lower tableware baskets 2 and 3, respectively. 12c and 12d are provided. The first, second, and third arm nozzles 10, 11,
Reference numeral 12 denotes a cleaning means for injecting cleaning water.

Reference numerals 9 and 13 denote a rotation axis of the first arm nozzle 10 and a rotation axis of the third arm nozzle 12, respectively.

The operation of the dishwasher configured as described above will be described below. First, the tableware is stored in the upper and lower tableware baskets 2 and 3 and mounted on a predetermined position of the washing tank 1 to start the operation.
, And then the washing water pressurized by the washing pump 4 together with the detergent, the first, second and third arm nozzles 10,
The main cleaning step of jetting from 11 and 12 is performed. After the main cleaning process for a predetermined time, the process then enters a drainage process in which cleaning water containing dirt is discharged outside the machine. Subsequently, the water supply step, the rinsing step, and the drain step are repeated three to four times, and the washing is completed. The basic operation of the washing process is the same as that of the conventional dishwasher.

In the operation in the main washing and rinsing steps, the third arm nozzle 12 performs a revolving motion about the rotating shaft 13, that is, a planetary motion, while revolving around the rotating shaft 9, and performs upper and lower stages. Tableware basket 2, 3
Jets 12a, 12 for all dishes set in
Since the cleaning water sprayed from d, 12b, and 12c is sprayed with a random rotation trajectory as shown in FIG. 2, it is possible to clean evenly every corner of the tableware, and the cleaning power is greatly improved. Therefore, the amount of washing water to be sprayed from the first and second arm nozzles 10 and 11 to the upper tableware basket 2 and the lower tableware basket 3 can be much smaller than before. In other words, the uniform cleaning properties of both the upper and lower tableware baskets 2 and 3 by the arm nozzle 12 can significantly reduce the pump water power required for cleaning. Nozzle 10 and third
Arm nozzle 12 as well as the second arm nozzle 11
The discharge pressure required to obtain a predetermined cleaning power is obtained at each of the nozzles, and the required cleaning power can be obtained with an extremely small cleaning water power as a whole. Therefore, high cleaning power can be obtained even with a small cleaning pump, and at the same time, the noise of pump operation and the volume of the jet cleaning water can be reduced to reduce the collision noise and dripping noise of the cleaning water with the cleaning tank 1, thereby significantly increasing the cleaning noise. A significant reduction can be realized.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described. In FIG. 1, the third arm nozzle 12 is configured such that the direction of rotation about the rotation axis 13 thereof is opposite to the direction of rotation of the first or second arm nozzles 10 and 11. Other configurations and basic operations of the cleaning process are the same as those of the first embodiment. Note that the first and second arm nozzles 10,
Although the case where the rotation directions of 11 are different is assumed, there is no change even if they rotate in the same direction.

In this embodiment, in addition to the uniform cleaning of the upper and lower cleaning areas by the third arm nozzle 12 described in the first embodiment, the third arm nozzle 12
Alternatively, the washing water is sprayed on both the front and back surfaces of the upper and lower tableware baskets 2 and 3 by reversing the rotation of the second arm nozzle, thereby suppressing recontamination on the backside of the tableware and simultaneously controlling the tableware setting direction. Excellent detergency is obtained. That is, by setting the nozzle rotation direction to an appropriate forward / reverse direction, the cleaning power of the upper and lower tableware baskets for the dishes is further increased, and at the same time, the degree of freedom of the tableware arrangement is significantly improved and the usability is improved.

[0021]

As described above, in the dishwasher of the present invention, as the washing means, the first arm nozzle disposed in the lower space of the upper tableware basket and the rotation axis are eccentric by a certain distance, and By providing a third arm nozzle that is rotatable on the arm nozzle and has injection ports on both upper and lower surfaces,
For all dishes in the upper and lower tableware baskets, extremely high cleaning efficiency can be obtained by uniform cleaning by randomizing the injection trajectory of the third arm nozzle, and high cleaning power can be obtained with a small cleaning pump. At the same time, the washing noise is significantly reduced.

In addition, the dishwasher of the present invention, in addition to the uniform cleaning property of the upper and lower tableware baskets for dishes, rotates the third arm nozzle reversely with the first or second arm nozzle, thereby providing the upper and lower dishes. Cleaning water is sprayed on both the front and back surfaces of all dishes in the lower tableware basket, preventing re-contamination and improving cleaning power, as well as high cleaning power regardless of the direction in which the tableware is set. And a dishwasher.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a dishwasher according to first and second embodiments of the present invention.

FIG. 2 is a view showing a rotation motion locus of an injection port of a third arm nozzle of the dishwasher.

FIG. 3 is a sectional view of a dishwasher proposed by the inventors previously.

FIG. 4 is a sectional view of a conventional dishwasher.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing tank 2 Upper table basket 3 Lower table basket 4 Cleaning pump 10 1st arm nozzle 11 2nd arm nozzle 12 3rd arm nozzle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-282125 (JP, A) JP-A-4-352931 (JP, A) JP-A-4-164430 (JP, A) 112352 (JP, U) JP 4-93056 (JP, U) JP-A 63-83163 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A47L 15/00-15 / 42

Claims (2)

(57) [Claims] 1. A washing tank, an upper and lower tableware for accommodating dishes in the washing tank, a washing pump for pressurizing and circulating washing water, and washing means having an injection port for injecting washing water. The washing means comprises a first arm nozzle which rotates substantially horizontally, and a second arm nozzle provided in a lower space of the lower tableware basket.
The first arm nozzle and the third arm nozzle having a rotation axis eccentric by a predetermined distance and rotatably provided on the first arm nozzle. A dishwasher in which a nozzle and the third arm nozzle are provided in a lower space of the upper tableware basket, and the third arm nozzle has injection ports on both upper and lower surfaces thereof. 2. A third arm nozzles claim 1 configured to rotate opposite to the first or second arm nozzles
Dishwasher as described .