JPH03237963A - Dish-washing machine - Google Patents

Abstract

PURPOSE:To rotate a washing nozzle without trouble even if garbage is mingled in washing water, by a method wherein a guide nozzle is mounted in the washing nozzle, and guide projections for guiding the rotation of the washing nozzle are formed at least either on the inner wall of the washing nozzle or on the outer wall of the guide nozzle. CONSTITUTION:This device has a washing nozzle 6 and a guide nozzle 5; the former has a plurality of spray holes, 8a to 8f and is rotatably formed in the shape of a cylinder and the latter is mounted in the washing nozzle 6 and guide holes, 19a to 19f, through which washing water is sent to the spray holes, 8a to 8f, are formed thereon. Guide projections, 20a to 20f for guiding the rotation of the washing nozzle 6 are formed at least either on the inner wall of the washing nozzle 6 or on the outer wall of the guide nozzle 5. Although some of garbage 21 passes through the guide holes, 19a to 19f and enters a gap between the guide nozzle 5 and the washing nozzle 6, the rotational resistance of the washing nozzle 6 is hardly increased since the gap between them is made larger. Furthermore, since a play between the guide nozzle 5 and the washing nozzle 6 is reduced by the guide projections, 20a to 20f, its rotation is made smooth and silent.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a dishwasher for washing tableware, and is particularly characterized by the configuration of a washing nozzle.

Conventional technology inventors first proposed a dishwasher using a bar nozzle (
Exit l1i) It is written. Its configuration is shown in FIG. 8, and a plurality of washing water injection holes 8a to 8f are provided in the longitudinal direction on the bottom side of the tableware storage basket 2 provided in the washing tank 1 so as to wash the tableware 3 evenly. A cylindrical cleaning nozzle 6 is provided. This cleaning nozzle 6 is rotatable by a rotary arm 9. The cleaning nozzle 6 injects a portion of the cleaning water 11 that is force-fed by the cleaning pump 4 from the propulsion injection hole 10 provided in the rotary arm 9, thereby spraying the plurality of jets while rotating around the axis of the cylinder. Holes 8a to 8f
Furthermore, the tableware 3 is washed by simultaneously jetting washing water over the entire circumference of the rotation locus. In the figure, 14 is an arm nozzle provided opposite to the tableware storage basket 16, which sprays and washes the tableware 15 from below.

In the structure described above, since the washing water is sprayed over the entire rotational trajectory of the injection hole of the washing nozzle 6, the cleaning water is sprayed over the circumferential angular range where the tableware storage basket does not exist, that is, the space where there are no tableware. Also, unnecessary and ineffective cleaning water is sprayed. Therefore, a large amount of ineffective cleaning water power is consumed, resulting in poor energy efficiency. Furthermore, since the structure is such that cleaning water is always jetted simultaneously from a plurality of injection holes, and a large amount of cleaning water is jetted, a cleaning pump with excessive capacity is required in order to obtain the necessary jetting cleaning discharge pressure. Furthermore, there is a problem in that a high level of cleaning noise is generated due to the injection of a large amount of cleaning water and the use of a large capacity pump.

Therefore, in order to further solve the above problem, the inventors
We proposed a dishwasher with the washing nozzle shown in Figure 9 (
Out 1Ji) Shiru. This includes a cylindrical cleaning nozzle 6 and a guide nozzle 5 provided inside the cleaning nozzle 6, and the cleaning nozzle 6 is rotated about the guide nozzle 5 by a rotary arm 9 communicating with the guide nozzle 5. A plurality of wash water guide holes 7a to 7f are formed at appropriate axial pitches on the cylindrical steel surface of the guide nozzle 5 facing the tableware storage basket 2, that is, on the upper surface side. . The cylindrical side surface of the cylindrical cleaning nozzle 6 is provided with a plurality of cleaning water guide holes 7a to 7f provided in the guide nozzle 5 at an axial pitch corresponding to the plurality of cleaning water guide holes 7a to 7f, and offset from each other at an appropriate circumferential angle in the circumferential direction. A plurality of cleaning water injection holes 83 to 8f are provided. A rotary arm 9 having a propulsion injection hole 10 is provided at one end of the cleaning nozzle 6, and by rotation of the rotation arm 9, the cleaning water injection holes 8a to 8f of the cleaning nozzle 6 are sequentially connected to the corresponding guide holes 7a to 7a. It is configured to pass over 7f.

With this configuration, the washing water is sprayed in a concentrated manner only to the limited space where the tableware exists in the washing tank 1, thereby reducing the consumption of ineffective washing water power in the space where there is no tableware to be washed. I'm trying to get rid of it. At the same time, the amount of washing water injected from the plurality of injection holes 8a to 8f of the washing nozzle 6 is suppressed to the necessary minimum, so that the tableware can be evenly washed. This reduces the required cleaning water power,
To provide a dishwasher with high cleaning energy efficiency, which can perform cleaning with high jet cleaning discharge pressure even if a cleaning pump with relatively small capacity is used.

Problems to be Solved by the Invention However, in the dishwasher with the above structure, the washing water may contain foreign matter such as leftovers such as sesame seeds and rice or sand, due to forgetting to install a filter to collect leftovers. Sometimes, this foreign matter enters the gap between the cleaning nozzle 6 and the guide nozzle 5, which increases the rotational resistance of the cleaning nozzle 6, which may cause the cleaning nozzle 6 to rotate incorrectly. As a countermeasure to this problem, it is possible to increase the gap between the cleaning nozzle 6 and the guide nozzle 5, but this increases the looseness between the cleaning nozzle 6 and the guide nozzle 5, causing a problem that the cleaning nozzle 5 does not rotate smoothly. Further, since the cleaning water discharged from the guide holes 7a to 7f leaks to other injection holes through the gaps, there is also the problem that the loss is large and the injection pressure is lowered.

The present invention was made in view of the above-mentioned problems, and the first purpose is to provide a dishwasher that does not impair the rotation of the washing nozzle even if leftover food gets mixed into the washing water due to forgetting to install the filter. The goal is to provide the following.

A second object is to provide a dishwasher in which the rotation of the washing nozzle is smooth even when leftover food is mixed in, the leakage of washing water is reduced, and the jetting pressure of the washing water is increased.

Means for Solving the Problems In order to achieve the first object, the dishwasher of the present invention includes a washing tank, a dish storage basket for storing dishes in the washing tank, and a plurality of dishwashing baskets for spraying washing water. a rotatable cylindrical cleaning nozzle having an injection hole, and a guide nozzle installed in the cleaning nozzle and provided with a guide hole for sending cleaning water to the injection hole, the inner wall of the cleaning nozzle or the guide nozzle A guide protrusion for guiding the rotation of the cleaning nozzle is provided on at least one of the outer walls.

In order to achieve the second object, the dishwasher of the present invention includes a washing tank, a dish storage basket for storing dishes in the washing tank, and a plurality of injection holes for spraying washing water. The cleaning nozzle is provided with a rotatable cylindrical cleaning nozzle, and a guide nozzle that is installed inside the cleaning nozzle and is provided with a guide hole for sending cleaning water to the injection hole, and the cleaning nozzle is formed around the injection hole on the inner wall of the cleaning nozzle. A guide protrusion is provided to guide rotation.

Effect When foreign matter such as leftover food or sand gets mixed into the washing water with the above configuration, most of the foreign matter passes through the guide hole of the guide nozzle and is discharged to the outside of the washing nozzle. However, some of the foreign matter passes through the guide hole and enters the gap between the guide nozzle and the cleaning nozzle. At this time, since the width of the guide nozzle and the cleaning nozzle is wide, the increase in rotational resistance of the cleaning nozzle is minute and the rotation of the cleaning nozzle does not stop. Further, due to the guide protrusion provided on the inner wall of the cleaning nozzle, there is little wobbling between the cleaning nozzle and the guide nozzle, and the cleaning nozzle rotates smoothly.

Further, by providing a guide protrusion around the injection hole on the inner wall of the cleaning nozzle, the gap between the guide nozzle and the guide rib is reduced, and leakage of cleaning water is reduced. For this reason, when the injection hole and the guide hole coincide, the amount of cleaning water that is ejected from the injection hole increases, and the cleaning efficiency increases.

EXAMPLE A first example of the present invention will be described below with reference to FIGS. 1 to 5. Components that are the same as those described in FIGS. 8 and 9 are given the same reference numerals, detailed explanations are omitted, and differences will be mainly explained below. This dishwasher has a washing tank 1, a dish storage basket 2 for storing dishes 3 in the washing tank 1, and a rotatable cylindrical shape having a plurality of injection holes 8a to 8f for spraying washing water. a cleaning nozzle 6, and a guide nozzle 5 provided with guide holes 19a to 19f that are installed inside the cleaning nozzle 6 and send cleaning water to the injection holes 8a to 8f,
A guide protrusion 20 that guides the rotation of the cleaning nozzle 6 on at least one of the inner wall of the cleaning nozzle 6 or the outer wall of the guide nozzle 5.
This is a configuration in which a to 20f are provided. The cleaning nozzle 6 is rotated about the guide nozzle 5 by a rotary arm 9 communicating with the guide nozzle 5.

Details of the guide nozzle 5 and the cleaning nozzle 6 will be explained. 2 to 5, a plurality of guide holes 19a to 19f provided in the guide nozzle 5 are provided at a constant axial pitch on the cylindrical side surface facing the tableware storage basket 2, and injection holes 8a to 19f of the cleaning nozzle 6 are provided at a constant pitch in the axial direction. 8r is the guide hole 19 of the guide nozzle 5
A plurality of them are provided in the circumferential direction at an axial pitch corresponding to a to 19f and offset from each other at appropriate circumferential angles. Further, a plurality of guide ribs 20a to 20f for guiding the rotation of the cleaning nozzle 6 are formed on the inner wall of the cleaning nozzle 6. Furthermore, a rotary arm 9 having a propulsion injection hole 10 is provided at one end of the cleaning nozzle 6 . Due to the rotation of the cleaning nozzle 6 due to the rotation of the rotary arm 9, the injection holes 8a to 8f are sequentially connected to the corresponding guide holes 19.
It is designed to pass above a to 19f. Reference numeral 21 indicates foreign matter such as leftover food that has entered the gap between the guide nozzle 5 and the cleaning nozzle 6.

Hereinafter, the effects of the above configuration will be explained. The cleaning water 11 pumped by the cleaning pump 4 is supplied to the guide nozzle 5 via the square channel 12, and at the same time, the rotating arm 9
The cleaning nozzle 6 is
Rotate.

At any point in time during this rotation, any part of the plurality of guide holes 19a to 19f of the guide nozzle 5, for example, the guide hole 1
When the injection hole 8a of the cleaning nozzle 6 corresponding to 9a overlaps the guide hole 19a on its rotation trajectory, the cleaning water is sprayed from the injection hole 8a toward the tableware storage basket 2 via the guide hole 19a. . At this time, the other injection holes 8b to 8f are respectively located toward the space where the tableware storage basket 2 does not exist, and the relative positions on the rotation trajectory of the respective injection holes and the corresponding other guide holes 19b to 19f. are slightly deviated from each other, so that the guide holes 19a to 19
The injection of the cleaning water from the other injection holes 8b to 8f via the guide nozzle 5 is suppressed, and only the amount of cleaning water that leaks from the gap between the guide nozzle 5 and the cleaning nozzle 6 flows out. As the cleaning nozzle 6 rotates, operations similar to those described above are sequentially performed in other injection holes and guide holes. In other words, one rotation completes one cycle of injection from each injection hole, and this operation is repeated to remove the tableware 3 stored in the tableware storage basket 2.
All cleaning is done evenly. Further, when foreign matter 21 such as leftover food or sand gets mixed into the washing water, most of the foreign matter 21 passes through the ejection holes 8a to 8r and is ejected to the outside of the nozzle, but a part of the foreign matter 21 is mixed into the guide hole 19a. ~19f and enters between the gap between the guide nozzle 5 and the cleaning nozzle 6. By providing a large gap between the guide nozzle 5 and the cleaning nozzle 6, the increase in rotational resistance of the cleaning nozzle 6 is minimal.
The rotation never stops. Also, the guide protrusions 20a to 20
f suppresses rattling between the guide nozzle 5 and the cleaning nozzle 6, making the cleaning nozzle 6 less likely to bend, improving nozzle reliability and smoother rotation, thereby eliminating problems caused by rattling when the nozzle rotates. This reduces noise and makes it quieter.

Although the guide protrusions 20a to 20f are provided on the inner wall of the cleaning nozzle 6 in this embodiment, they may be provided on the outer wall of the guide nozzle 5 or on both the inner wall of the cleaning nozzle 6 and the outer wall of the guide nozzle 5. .

Next, a second embodiment of the present invention will be explained based on FIGS. 6 and 7. Since many of the mechanical parts are the same as those in the first embodiment and are shared, some explanations will be omitted. In this embodiment, the injection holes 8a to 8 are formed on the inner wall of the cleaning nozzle 6.
A guide protrusion 22 that guides the rotation of the cleaning nozzle 5 around f
a to 22f are provided.

In the above configuration, the guide protrusions 22a to 22f and the guide nozzle 5
Since the gap formed between the cleaning nozzle 6 and the guide nozzle 5 is narrower than the gap formed between the cleaning nozzle 6 and the guide nozzle 5, the leakage flow of cleaning water is reduced, and the injection pressure of the cleaning water can be increased. Furthermore, even if foreign matter 21 gets mixed in, the increase in rotational resistance of the cleaning nozzle 6 can be minimized by making the width of the guide protrusions 22a to 22f narrow and the contact angle in the rotational direction small. The nozzle 6 never stops rotating. In addition, the guide protrusions 20a to 2Of suppress rattling between the guide nozzle 5 and the cleaning nozzle 6, making the cleaning nozzle 6 less likely to bend, improving the reliability of the nozzle, and smoothing the rotation. Needless to say, it reduces noise and makes it quieter.

Effects of the Invention As described above, the dishwasher of the present invention has a guide protrusion for guiding the rotation of the washing nozzle on at least one of the inner wall of the washing nozzle or the outer wall of the guide nozzle, thereby reducing the play between the guide nozzle and the washing nozzle. In order to suppress sticking, the rotation of the cleaning nozzle does not stop even if foreign matter gets mixed in, and it is possible to provide a dishwasher that rotates smoothly, is highly reliable, and has low noise.

Further, by providing a guide protrusion around the injection hole on the inner wall of the washing nozzle to guide the rotation of the washing nozzle, it is possible to provide a dishwasher that reduces the amount of leakage water and increases the injection pressure of washing water.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a dishwasher according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a washing nozzle of the same dishwasher,
Figure 3 is a longitudinal sectional view of the guide nozzle of the same dishwasher, Figure 4 is a longitudinal sectional view when the cleaning nozzle and guide nozzle are assembled and installed, and Figure 5 is an enlarged cross-sectional view when the cleaning nozzle and guide nozzle are installed. 6 is a longitudinal cross-sectional view of a guide nozzle for a dishwasher according to a second embodiment of the present invention, and FIG. 7 is an enlarged cross-sectional view of the guide nozzle and the cleaning nozzle shown in FIG. 5 when mounted. , FIG. 8, and FIG. 9 are longitudinal sectional views of a conventional dishwasher, respectively. 1... Washing tank, 2... Tableware storage basket, 5... Guide nozzle, 6... Washing nozzle, 8a-8f... Spray hole, 19a-19f... Guide hole, 20a-20f ...
Guide ribs, 22a to 22f... guide ribs.

Claims (2)

[Claims] (1) A washing tank, a tableware storage basket for storing dishes in the washing tank, a rotatable cylindrical washing nozzle having a plurality of injection holes for spraying washing water, and an interior installed in the washing nozzle. A dishwasher comprising a guide nozzle provided with a guide hole for sending washing water into the injection hole, and a guide protrusion for guiding the rotation of the washing nozzle on at least one of the inner wall of the washing nozzle and the outer wall of the guide nozzle. (2) a washing tank, a tableware storage basket for storing dishes in the washing tank, a rotatable cylindrical washing nozzle having a plurality of injection holes for spraying washing water, and an interior installed in the washing nozzle. A dishwasher comprising a guide nozzle provided with a guide hole for sending washing water to the injection hole, and a guide protrusion for guiding the rotation of the washing nozzle around the injection hole on the inner wall of the washing nozzle.