JP2701468B2 - Dishwasher - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes, cooking utensils, and the like by spraying washing water, and particularly to a combination of a rotating nozzle and a rod-shaped nozzle as washing means.

2. Description of the Related Art Conventionally, a general operation method of this type of dishwasher will be described with reference to FIG.

After the tableware and cooking utensils are stored in a predetermined place of the tableware basket composed of the upper basket 1 and the lower basket 2 and arranged in the washing tank 3, the operation is started by putting in the detergent, first, the water supply valve (FIG. There is a water supply step of supplying a predetermined amount of cleaning water to the bottom 4 of the cleaning tank 3 by the operation of the cleaning tank 3 (not shown). Subsequently, the water is supplied to the arm nozzle 6 and the tower nozzle 7 together with the cleaning water and the detergent pressurized by the cleaning pump 5. The main washing step of spraying from the opening is performed. Hereinafter, the rotating nozzle 6 and the tower nozzle 7 are collectively referred to as a cleaning nozzle. In this main washing process, the washing tank 3
The heater 9 provided therein is energized to heat the washing water and tableware to a predetermined temperature. After the main washing step for a predetermined time, a draining step of draining washing water containing dirt washed off from tableware or the like by the drainage pump 10 is performed. Next, a water supply step of supplying fresh washing water, and dishwashed with detergent and garbage (the dish attached to the dish as garbage is called garbage) by injecting the washing water from the washing nozzle. The rinsing step for rinsing and the like and the draining step for discharging the washing water out of the machine are repeated four times in succession to complete the washing, and the residual vegetables are collected in the filter 8 provided inside the washing tank. You. In particular, the final rinsing step is called a heating rinsing step, in which the heater 9 is energized to heat the washing water and tableware to a predetermined temperature,
The washing process has been completed.

Problems to be Solved by the Invention However, in the conventional dishwasher, since the washing means for the dishes and the like of the upper basket 1 is constituted by the tower nozzle 7, a part of the lower basket 2 is prevented from contacting the tower nozzle 7. It is necessary to cut out in a substantially U-shape from the rear part to the center part of the washing tank 3, and there is a problem that the storage capacity of tableware is smaller than the internal volume of the washing tank 3.

Further, washing water alone is not sufficiently sprayed on the tableware in the corner portion of the upper basket 1 only by spraying from the opening of the tower nozzle 7, and poor cleaning or re-adhesion of the tableware (dirt once washed off from the tableware) Again contaminating other dishes).

Furthermore, when small articles such as spoons, forks and knives are stored in a dedicated small basket having a lower surface constituted by a large number of small holes arranged in the lower basket 2, an arm nozzle 6 or a tower nozzle is provided on one side such as a spoon. Although cleaning water is directly sprayed from No. 7, there is also a problem that cleaning water is not sufficiently sprayed on the opposite surface, resulting in poor cleaning.

As a solution to these problems, there has been a conventional arrangement in which an arm nozzle is arranged on the upper side in addition to the lower arm nozzle. In this case, tableware and the like are included in the range of the rotation locus of the arm nozzle. In the case of a rectangular cross section which cannot be stored and has a large difference in the width and depth of the washing tank, the rotation trajectory of the arm nozzle is limited to a shorter side of the rectangle, and thus the upper basket 1 In addition, the washing performance for the dishes at the lower corner of the second car becomes insufficient.

The present invention has been made in view of the above-described problems, and has an improved cleaning means.
Efficiently arrange tableware to increase the storage capacity and improve the cleaning performance of tableware placed at the corners of the tableware basket, and improve the cleaning efficiency in a cleaning tank with a rectangular cross section with a large difference in width and depth dimension. Is the primary purpose.

A second object is to efficiently clean small items such as spoons with a simple and low-cost configuration.

Means for Solving the Problems In order to achieve the first object, the present invention provides a cleaning tank having a rectangular cross section having a large difference in width and depth dimension, and storing an object to be cleaned in the cleaning tank in a vertical direction. Dish baskets arranged in multiple stages, washing means for injecting washing water to the object to be washed, the washing means, in the space between the upper and lower tableware basket in the washing tank, the length of the washing tank A first cleaning means which is a rod-shaped nozzle arranged along the direction and rotates about the longitudinal direction as a rotation axis, and a lower space of the lowermost tableware basket rotates substantially on a horizontal plane and a longitudinal direction of the cleaning tank. And a second cleaning means comprising a plurality of nozzles of the arm disposed in the cleaning means.

Further, in order to achieve the second object, the present invention further comprises a first cleaning means which is a rod-shaped nozzle having a propulsion nozzle having an opening by extending a cleaning flow path from one end. is there.

According to the above configuration of the dishwasher of the present invention, in the washing process, washing water is sprayed from the rod-shaped nozzle mainly to the upper dish basket and from the arm nozzle mainly to the lower dish basket, and the dishware and the like are discharged. The lower basket does not have a substantially U-shaped notch as in the tower nozzle system, so the storage capacity of tableware can be expanded,
A large diameter dish can be washed because a non-rotating rod-shaped nozzle is arranged at the top. Furthermore, by this configuration, in addition to the injection from the rod-shaped nozzle in the cleaning step, by the injection from the plurality of arm nozzles, it is possible to efficiently wash not only tableware arranged at the corner of the lower basket but also small items, By placing small items in the corners, the storage capacity of tableware is large, and the operability when storing tableware is enhanced.

In the washing process, the rod-shaped nozzle sprays washing water onto the upper and lower tableware baskets while rotating around the axis of the rod by the propulsion nozzle, and at the same time, ejects small items such as spoons from the arm nozzle. It can be washed efficiently.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view of a main part showing the structure of a dishwasher according to the first embodiment, wherein 12 is a washing tank, 13 is a washing pump, 14
Numerals 15 and 15 denote first and second cleaning means provided with openings for spraying the cleaning water pressurized by the cleaning pump 13, which are respectively called a rod-shaped nozzle and an arm nozzle. Reference numeral 16 denotes a filter for collecting residual vegetables, and a lower portion thereof has a drain port communicating with a suction port of the washing pump 13 and a suction port of a drain pump (not shown). Reference numerals 17 and 18 denote tableware baskets for storing objects to be cleaned such as tableware in the washing tank 13, which are called an upper basket and a lower basket, respectively. 19 is a heater for heating the washing water, 20 is the washing pump
12. A control device that controls the operation of the drainage pump and the like.

The operation of the above configuration will be described below. A predetermined amount of detergent is charged, and dishes and the like are placed in the upper basket 17,
It is stored in the lower car 18 and operation is started. First, when the cleaning water is supplied by energizing a water supply valve (not shown), the cleaning pump 13 pressurizes the cleaning water containing the detergent and pressurizes the rod-shaped nozzle 14.
Then, a main washing step of spraying from the arm nozzle 15 is performed, and dirt attached to tableware and the like is washed away. The washing water containing dirt in this step is sent to the washing pump 13 while being filtered by the filter 16, and is repeatedly ejected from the rod-shaped nozzle 14 and the arm nozzle 15. In the main washing step, the heater 19 provided in the washing tank 12 is energized to heat the washing water, dishes, and the like to a predetermined temperature. After the main washing process for a predetermined time, a draining process for draining dirty washing water is performed next, and the washing water in the washing tank 12 is sent to a drain pump while being filtered by the filter 16 and discharged outside the machine. Is done. Subsequently, a water supply step of newly supplying washing water, a rinsing step of spraying washing water from the rod-shaped nozzle 14 and the arm nozzle 15 to rinse dishes and dishes etc. which are contaminated with residual vegetables, etc. The draining step of discharging to the outside is repeated four times in succession to complete the washing, and the residual vegetables are collected on the filter 16. In particular, the final rinsing step is heated to complete the cleaning step.

In this washing step, washing water is jetted from the rod-shaped nozzle 14 mainly to the upper car 17 and from the arm nozzle 15 mainly to the lower car 18 to wash dishes and the like. In the present embodiment, since the lower basket 18 is configured to wash the arm nozzles 15, the lower basket 18 is housed in the washing tank 12 by cutting the substantially U-shaped notch as in the tower nozzle system. There is no need to provide at 18. Therefore, the tableware and the storage capacity can be expanded, and the storage capacity can be made the same as that of the tower nozzle system, so that the storage intervals of the tableware can be increased and the usability can be improved. At the same time, since the rod-shaped nozzle 14 formed on the upper part does not rotate on the horizontal plane, dishes with a large diameter up to almost the same height as the rod-shaped nozzle 14 can be washed in the lower basket 18. In addition, if it is a structure like this example, even if it is a rectangular cross section with a large difference in the width dimension and the depth dimension of the washing tank, the washing performance for the tableware at the corner portion of the upper basket 1 becomes sufficient and high washing performance is achieved. It is obtained.

Next, a second embodiment of the present invention will be described. FIG. 2 is a cross-sectional view of a main part showing a configuration of a dishwasher according to a second embodiment of the present invention. The configuration of mechanical components is similar to that of the first embodiment and is commonly used. Description is partially omitted. In the figure, 21 is a rod-shaped nozzle as cleaning means,
Reference numeral 22 denotes a propulsion nozzle provided with an opening by extending the washing water flow path from one end of the rod-shaped nozzle 21, and reference numeral 23 denotes an arm nozzle.
Note that the basic operation of the cleaning process is the same as that of the first embodiment, and thus the description is omitted.

In this washing step, washing water is jetted from the rod-shaped nozzle 21 mainly to the upper basket 17 and from the arm nozzle 23 mainly to the lower basket 18 to wash dishes and the like. In particular, in the present embodiment, the rod-shaped nozzle 21 is rotated about the axis of the rod-shaped nozzle 21 as a propulsion force by the reaction force generated by the injection of the washing water from the opening of the propulsion nozzle 22 while the upper cage 17 and the lower cage 18 are rotated. Washing water is sprayed on the dishes of the lower basket 18, so that the dishes of the lower basket 18 are also simultaneously sprayed from the arm nozzle 23, so that the washing is performed from both the upper and lower directions. Small items such as spoons that required water power are efficiently cleaned. That is, excellent cleaning performance can be obtained with a simple and low-cost configuration without increasing the capacity of the cleaning pump.

Further, a third embodiment of the present invention will be described. FIG. 3 is a cross-sectional view of a main part showing a configuration of a dishwasher according to a third embodiment of the present invention. The configuration of mechanical components is similar to that of the first embodiment and is commonly used. Description is partially omitted. In the drawing, as cleaning means, 24 is a rod-shaped nozzle, 25 is a propulsion nozzle having an opening by extending a cleaning water flow path from one end of the rod-shaped nozzle 24, and 26 and 27 are a first arm nozzle and a second arm, respectively. It is a nozzle and the whole is called a twin arm nozzle. Note that the basic operation of the cleaning process is the same as that of the first embodiment, and thus the description is omitted.

In this washing step, washing water is sprayed from the rod-shaped nozzle 24 mainly to the upper basket 17 and from the arm nozzles 26 and 27 mainly to the lower basket 18 to wash dishes and the like. The rod-shaped nozzle 24 is rotated about the axis of the rod-shaped nozzle 24 as a propulsion force by using the reaction force generated by the injection of the cleaning water from the opening of the propulsion nozzle 25 to wash the dishes of the upper basket 17 and the lower basket 18. Since water is sprayed, tableware and the like in the lower basket 18 are also simultaneously sprayed from the arm nozzles 26 and 27, so that washing is performed from both the upper and lower directions, and it is difficult to wash with the conventional configuration, and excessive washing water power was required. Accessories such as spoons are efficiently cleaned. In particular, in this embodiment, in addition to the injection from the rod-shaped nozzle, the first arm nozzle 26 and the second arm nozzle 27
This is a configuration in which the dishes and the like of the lower basket 18 are washed by the jet from the container, and the dishes and the like arranged at the corners of the lower basket 18 can be reliably washed. That is, it is possible to arrange the small articles at the corners of the lower basket 18, so that an easy-to-use tableware basket having a large tableware storage capacity and excellent operability when storing the tableware can be constructed. Further, in the present embodiment, the nozzle 24 is configured to rotate. However, even if the rod-shaped nozzle is of a fixed type, the same effect can be obtained by appropriately arranging the position and the number of the openings for jetting the washing water. It goes without saying that it can be obtained.

In addition, the present invention is applicable to any cleaning means, especially those having a rectangular cross section having a large difference between the width and depth of the cleaning tank, for example, those having a width of 25 cm, a depth of 50 cm, and conversely a width of 50 cm and a depth of 25 cm. It goes without saying that it is possible to obtain excellent washing performance, and it is possible to constitute various types of dishwashers that are easy to use.

Effect of the Invention As described above, the present invention provides a washing tank having a rectangular cross section having a large difference in width and depth dimension, and a dish basket and a washing tank that absorbs an object to be washed in the washing tank and are arranged in multiple stages in the vertical direction. Washing means for injecting water onto the object to be washed, wherein the washing means is in a space between upper and lower tableware baskets in the washing tank,
A first cleaning means, which is a rod-shaped nozzle arranged along the longitudinal direction of the washing tank and rotates with the longitudinal direction as a rotation, and the lower space of the tableware basket at the lowermost stage rotates on a substantially horizontal plane and performs the cleaning. The second means consisting of a plurality of arm nozzles arranged in the longitudinal direction of the tank, so that the rod-shaped nozzle is mainly arranged in the washing process from the rod-shaped nozzle to the upper basket and in the longitudinal direction. Wash water is mainly sprayed from a plurality of arm nozzles to the lower basket to wash dishes and the like, and the lower basket has a substantially U-shaped notch like a tower nozzle system. Therefore, it is possible to provide a dishwasher that can wash dishes with a large diameter because the upper bar-shaped nozzle does not rotate on a horizontal plane while the tableware storage capacity can be increased. In addition, the objects to be washed arranged at the corners of the lower basket can be efficiently cleaned not only for tableware but also for small items by spraying from the plurality of arm nozzles, and the small items are arranged at the corners. This makes it possible to store a large amount of tableware and to have excellent operability when storing the tableware.

The present invention further comprises a propulsion nozzle having a cleaning channel extending from one end of the first cleaning means, which is a rod-shaped nozzle, and having an opening provided therein. The washing water is sprayed onto the upper and lower tableware baskets while rotating around the heart, and the washing can be efficiently performed with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a dishwasher according to a first embodiment of the present invention, FIG. 2 is a sectional view of a main part of a dishwasher according to a second embodiment, and FIG. FIG. 4 is a cross-sectional view of a main part of a conventional dishwasher. 12 ... cleaning tank, 13 ... cleaning pump, 14 ... rod-shaped nozzle,
15 ... Arm nozzle, 17 ... Upper basket, 18 ... Lower basket.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Taniguchi 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. (56) References JP-A-63-89136 (JP, A) JP-A-63- 153035 (JP, A) JP-A-60-236625 (JP, A) JP-A-50-58559 (JP, U) JP-A-60-182960 (JP, U) JP-A-62-178955 (JP, U) Japanese Utility Model Showa 62-189060 (JP, U) Japanese Utility Model Showa 51-63672 (JP, U) Japanese Patent Publication No. 41-7027 (JP, B1) Japanese Patent Publication No. 55-11342 (JP, B2) Japanese Public Showa 44-21889 (JP, Y1) Jikken 46-20627 (JP, Y1)

Claims (2)

(57) [Claims] 1. A cleaning tank having a rectangular cross section having a large difference between a width and a depth dimension, a tableware which stores objects to be cleaned in the cleaning tank and is arranged in multiple stages in a vertical direction, and the cleaning water is applied to the object to be cleaned. The washing means is a rod-shaped nozzle arranged along the longitudinal direction of the washing tank in a space between upper and lower tableware baskets in the washing tank, and rotates in the longitudinal direction. A first washing means rotating as an axis, and a second washing comprising a plurality of nozzles of a plurality of arms arranged in a longitudinal direction of the washing tank while rotating on a substantially horizontal plane in a lower space of the lowermost dish basket. Dishwasher with means. 2. The dishwasher according to claim 1, wherein the first washing means, which is a rod-shaped nozzle, has a propulsion nozzle having an opening formed by extending a washing flow path from one end.