JP2671520B2 - Dishwasher - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes, and particularly to a washing nozzle.

2. Description of the Related Art The inventors have previously applied for a dishwasher having a sectional structure as shown in FIG. That is, in FIG. 11, a plurality of washing water injection ports are provided in the longitudinal direction on the lower surface side of the dish storage basket 2 provided in the washing tank 1 so that the dishes 3 can be evenly washed.
A cylindrical cleaning nozzle 5 having 8a, 8b, 8c ... 8f is rotatably provided by a rotating arm 6. The cleaning nozzle 5 sprays a part of the cleaning water pumped by the cleaning pump 4 from the propulsion spraying port 7 provided on the rotary arm 6 to rotate the cylinder about the axis of the cylinder, and the plurality of spraying ports 8a. .. From 8f, the washing water is sprayed simultaneously over the entire circumference of the rotation trajectory to wash the dishes 3 and 15.
In the figure, reference numeral 14 denotes an arm nozzle provided to face the tableware storage basket 16, which sprays and cleans the tableware 15 from below.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the structure described above, since the cleaning water is sprayed over the entire circumference of the rotation trajectory of the spray nozzle of the cleaning nozzle, the circumferential angle range without the tableware storage basket, that is, the tableware Since unnecessary and ineffective cleaning water is sprayed into a space where there is no space, a large amount of ineffective cleaning water power is consumed and energy efficiency is not good. In addition, the structure is such that the cleaning water is constantly sprayed from a plurality of spraying ports at the same time, and a large amount of cleaning water is sprayed at the same time, so a cleaning pump with an excessive capacity is required to maintain the required spray cleaning discharge pressure. . Furthermore, a large amount of cleaning water is sprayed and a large capacity pump is used to generate a high level of cleaning noise.

In view of the problems as described above, the present invention is directed to a limited space range in both up and down directions in which tableware stored in a plurality of tableware storage baskets provided in the upper and lower stages of a cleaning tank are present. Only the cleaning water is sprayed,
It is an object of the present invention to provide a cleaning mechanism with high cleaning energy efficiency and low noise, which is capable of efficiently cleaning the dishes arranged vertically in both directions in the cleaning tank with the minimum required amount of cleaning water.

Means for Solving the Problems In order to achieve the above object, the dishwasher of the present invention includes a washing tank, a plurality of dish storage baskets provided in the upper and lower stages of the washing tank, and a dish storage basket in the lower stage. A first cleaning nozzle, a cylindrical second cleaning nozzle provided in a space sandwiched between the upper and lower dish storage baskets, and a cylindrical guide nozzle provided inside the second cleaning nozzle. , The second cleaning nozzle is rotatably fitted and mounted on the guide nozzle, and the guide nozzle is fixed without rotating and has an appropriate axial pitch on the cylindrical side surfaces facing the upper and lower dish storage baskets. A plurality of cleaning water guide holes are provided, and a plurality of cleaning water jets are formed in the second cleaning nozzle at an axial pitch corresponding to the cleaning water guide holes and displaced in the circumferential direction at appropriate circumferential angles. A plurality of washing water is provided by providing a mouth and rotating the second washing nozzle. Each of the injection ports is configured so as to sequentially pass over the wash water guide hole of the guide nozzle.

Function In the present invention, the cleaning water pumped by the cleaning pump according to the above configuration is first supplied to the guide nozzle and at the same time the cleaning nozzle is rotated. At an arbitrary point of time of this rotation, the injection port of the rotary cleaning nozzle corresponding to any one of the plurality of guide holes of the guide nozzle overlaps the guide hole on its rotation locus, and the cleaning water is sprayed through the guide hole. It is sprayed from the mouth toward the tableware storage basket. At this time, the other injection ports are respectively positioned toward the space where the tableware storage basket does not exist, and the relative positions on the rotation loci of the respective injection ports and the other corresponding guide holes are appropriately deviated. Therefore, the injection of the cleaning water from the other injection port via the guide hole is suppressed, and the cleaning water only leaks out from the fitting gap between the two nozzles. Further, in accordance with the rotation of the cleaning nozzle, the same operation as described above is sequentially performed in the other injection ports and the guide holes. That is, the cleaning water pumped by the cleaning pump and supplied to the guide nozzles is sprayed in the upward and downward two directions sequentially from the respective injection ports through the guide holes provided on the upper and lower side surfaces of the guide nozzle as the cleaning nozzle rotates. The dishes stored in the tableware storage baskets provided in the table are uniformly cleaned, and the invalid cleaning water spray to the space without the tableware storage basket is suppressed, and highly efficient spray cleaning is performed. .

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a vertical sectional view of the above embodiment. In FIG. 1, 4 is a cleaning nozzle 6 and an arm nozzle for cleaning water 11 stored at the bottom of the cleaning tank 1 through flow paths 12 and 13.
Washing pumps for feeding to 14 and 2 and 16 are dish storage baskets provided in the upper and lower stages in the washing tank 1, 3 and
Reference numeral 15 denotes the tableware stored in the tableware storage baskets 2 and 16, respectively, and the cylindrical cleaning nozzle 6 and the cleaning nozzle 6 are provided in the space on the back side of the tableware storage basket 2, that is, the upper surface side of the tableware storage basket 16. And a guide nozzle 5 provided inside thereof, and the cleaning nozzle 6 is mounted so as to be rotated by a rotating arm 9 about the guide nozzle 5. Further, an arm nozzle 14 is provided on the back side of the tableware storage basket 16. A plurality of wash water guide holes 7a, 7b, 7c, 7d, 7 are provided on the upper and lower cylindrical side surfaces of the guide nozzle 5 which face the dish storage baskets, respectively, at appropriate axial pitches.
e, 7f and 17a, 17b, 17c, 17d, 17e, 17f are formed.

Hereinafter, description will be given based on the guide nozzle 5 and the cleaning nozzle shown in FIGS. 3, 4, and 5 in addition to FIG. FIG. 3 shows a rotary cleaning nozzle 6, FIG. 4 shows a guide nozzle 5, and FIG. 5 shows a cross section of both of the mounted nozzles at an arbitrary cleaning water injection port 8a shown in the sectional configuration view of FIG. 7a and 7f and 17a ... 17f and the cleaning nozzle 6 provided on the upper and lower side surfaces of the guide nozzle 5, respectively.
8f shows the rotational relative positional relationship with the wash water injection ports 8a. In FIG. 1, FIG. 4 and FIG.
The cylindrical side surface of the cylindrical cleaning nozzle 6 has an axial pitch corresponding to the plurality of cleaning water guide holes 7a ... 7f and 17a. A plurality of cleaning water jets 8a, 8b, which are offset by the circumferential angle,
8c, 8d, 8e and 8f are provided with a rotary arm 9 having a propulsion injection port 10 at one end of the nozzle, and the cleaning water injection ports 8a ... It is configured to pass over the guide hole.

FIG. 2 is an optional washing water injection port of the embodiment shown in FIG.
8a is a cross-sectional view taken along the line 8a, where 1 is a cleaning tank, 2 and 16
Is a tableware storage basket for storing the tableware 3 and 15, 5 is a guide nozzle, and 6 is a washing nozzle. The fan-shaped range surrounded by the two-dot chain line forming the angles A and B in both the upper and lower directions in the cleaning tank 1 indicates the spray cleaning range in which the cleaning water is sprayed as the cleaning nozzle 6 rotates. Hereinafter, the operation of the above configuration will be described.

In the above configuration, the cleaning water 11 pumped by the cleaning pump 4 first sprays the cleaning water upward from the arm nozzle 14 through the flow path 13 to clean the dishes 15 stored in the dish storage basket 16. At the same time, the cleaning water 11 is supplied to the guide nozzle 5 via the flow path 12 and rotates the rotary cleaning nozzle 6 by being jetted from the propulsion jet port 10 provided in the rotary arm 9 communicating with the guide nozzle 5. At any point of this rotation, the arbitrary spray port 8a of the cleaning nozzle 6 overlaps the upper guide hole 7a of the guide nozzle 5, and at the same time the spray port 8d overlaps the lower guide hole 17d, so that the cleaning inside the guide nozzle 5 is completed. Water is sprayed from the spray ports 8a and 8d toward the upper and lower dish storage baskets 2 and 16, respectively, to wash the dishes 3 and 15. At this time,
The other injection ports 8b, 8c, 8e, 8f are located toward the space where the tableware storage baskets 2 and 16 do not exist, and other guide holes 7b, 7c, 7e corresponding to the respective injection ports,
7f and 17b, 17c, 17e, since the relative position on the rotational trajectory with 17f is appropriately deviated, respectively, the injection from the other injection port of the cleaning water via the other guide hole is suppressed, Only a small amount of cleaning water leaks from the fitting gap between the guide and cleaning nozzles. Further, as the cleaning nozzle 6 rotates, the spray port 8b overlaps the guide hole 7b and the spray port 8e overlaps the guide hole 17e, and the cleansing water is sprayed from the spray ports 8b and 8e toward the dish storage baskets 2 and 16, respectively. . Thereafter, as the cleaning nozzle 6 rotates, the same operation as described above is sequentially performed on the other injection ports, and one cycle is completed by one rotation. This operation is repeated and the upper and lower tableware storage baskets 2
All dishes 3 and 15 stored in and 16 are thoroughly cleaned. That is, the amount of cleaning water that is constantly sprayed at any point during the rotation of the cleaning nozzle 6 is suppressed to the amount that is sprayed from two of the spray ports plus some leakage from the other spray ports. , And a tableware storage basket 2
Since the ineffective injection of cleaning water into the space where and 16 do not exist is suppressed, the required cleaning water power is suppressed to the necessary minimum and highly efficient injection cleaning is performed. It should be noted that the tableware 15 stored on the lower side is simultaneously spray-washed by the washing nozzle 6 from above and jet-washed by the arm nozzle 14 from below, and an extremely high washing effect can be obtained.

EFFECTS OF THE INVENTION As described above, according to the present invention, only for a limited space range in both upper and lower directions in which tableware stored in a plurality of tableware storage baskets provided in two upper and lower stages in the washing tank exists. By injecting the wash water and simultaneously washing the tableware stored in the space in the two opposite vertical directions, it is possible to eliminate the waste of ineffective wash water power to the area where the tableware does not exist.

Further, by constantly squeezing to one or two of the plurality of jetting ports of the washing nozzle, and squeezing the amount of jetted washing water, a higher jetting discharge pressure can be obtained even if a washing pump having the same capacity as the conventional one is used. Therefore, the dirt stuck to the tableware can be easily washed. In addition, since it is possible to uniformly wash dishes without simultaneous injection from multiple injection ports, the required washing water power of the washing pump is suppressed and a washing pump with a relatively small capacity is used. Since the necessary jet cleaning discharge pressure can be obtained, it is possible to contribute to downsizing of the cleaning pump and suppression of cleaning noise. That is, the present invention provides a cleaning mechanism with extremely high cleaning energy efficiency, realizes low cleaning noise, and also provides an unprecedented dishwasher excellent in space saving structure and cost due to downsizing of the cleaning pump. To do.

[Brief description of the drawings]

1 is a vertical sectional view of a dishwasher of the present invention, FIG. 2 is a horizontal sectional view thereof, FIG. 3 is a vertical sectional view of a cleaning nozzle, FIG. 4 is a vertical sectional view of a guide nozzle, and FIG. FIG. 6 is an enlarged cross-sectional view of the guide nozzle and the washing nozzle when mounted, and FIG. 6 is a vertical cross-sectional view of a conventional dishwasher. 1 ... Washing tank, 2,16 ... Tableware storage basket, 3,15 ... Tableware, 4 ... Washing pump, 5 ... Guide nozzle, 6 ... Washing nozzle, 7a, 17a ... Guide hole, 8a ...... Injection port.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Yutaka Taniguchi, 1006, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) 21889 (JP, Y1)

Claims (1)

(57) [Claims] 1. A washing tank, a plurality of tableware storage baskets provided in the upper and lower stages of the cleaning tank, a first cleaning nozzle provided under the lower tableware storage basket, and tableware storage in each of the upper and lower stages. A cylindrical second cleaning nozzle provided in a space sandwiched between the baskets and a cylindrical guide nozzle provided inside the second cleaning nozzle are provided, and the second cleaning nozzle has the guide nozzle as an axis. Is rotatably fitted to the guide nozzle, the guide nozzle is fixed without rotating, and a plurality of wash water guide holes are formed at appropriate axial pitches on the cylindrical side surfaces facing the upper and lower dish storage baskets. Then, the second cleaning nozzle is provided with a plurality of cleaning water injection ports displaced in the circumferential direction at an appropriate circumferential angle at an axial pitch corresponding to the cleaning water guide hole, and the second cleaning nozzle is provided. By rotating the cleaning nozzle, each of the plurality of cleaning water injection ports Configured dishwasher as but sequentially passes through the washing water guide hole above the guide nozzle.