JPH03155823A - Tableware washing machine - Google Patents

Abstract

PURPOSE:To obtain the tableware washing machine which causes no rotation failure of a washing nozzle even if a foreign matter entered by providing a cylindrical washing nozzle having plurality pieces of injection holes, and a guide nozzle which is installed in the washing nozzle, and also, has a guide hole for feeding washing water into the injection holes and a guide cylinder of washing water. CONSTITUTION:When a foreign matter 21 is mixed into washing water, the greater part thereof passes through injection holes 8a...8f and discharged to the outside of a nozzle, but a part of the foreign matter 21 passes through guide holes 19a...19f and goes into a clearance of guide cylinders 20a...20f and a washing nozzle 6. In such a case, since the width of the guide cylinder 20a...20f is narrow, and a contact angle in the rotational direction is small, increase of a rotational resistance of the washing nozzle 6 is minute, therefore, rotation of the washing nozzle 6 does not stop. The foreign matter 21 which goes into a clearance of the guide cylinders 20a...20f and the washing nozzle 6 goes into a clearance of a guide nozzle 5 and the washing nozzle 6 by a leak water flow from the guide holes 19a...19f and the rotation of the washing nozzle 6. Since the clearance of the guide nozzle 5 and the washing nozzle 6 is taken larger than the clearance of the guide cylinders 20a...20f and the washing nozzle 6, increase of a rotational resistance of the washing nozzle 6 is only minute and the rotation of the washing nozzle 6 does not stop.

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 a washing nozzle.

Conventional technology In dishwashers using conventional arm nozzles, it is not possible to store dishes, etc. within the range of the arm nozzle's rotation locus, and in case of a dishwasher with a rectangular cross section with a large difference in width and depth, Since the rotation locus of the arm nozzle is limited to less than the short side of the rectangle, cleaning of a portion of the corner of the basket is poor. In order to solve these drawbacks, the inventors previously proposed (filed an application for) a dishwasher with a structure as shown in Figure 8.
are doing. That is, in FIG. 8, the lower surface side of the tableware storage basket 2 provided in the washing tank 1 has a plurality of washing water jet ports 8a...8f in the longitudinal direction so that the tableware 3 can be evenly washed.
A cylindrical cleaning nozzle 6 having a cylindrical shape is provided so as to be rotatable by its rotation angle 9. This cleaning nozzle 6 is
Cleaning pump 4 with propulsion injection port 1o provided on rotating arm 9
By injecting a part of the washing water pumped by the plurality of injection ports 8a while rotating around the axis of the cylinder.
. . . The tableware 3 is washed by simultaneously spraying washing water from 8f over the entire circumference of the rotation locus. 14 in the figure is an arm nozzle provided opposite to the tableware storage basket 16,
The tableware 15 is spray-washed from below.

However, in the structure as described above, since the washing water is sprayed over the entire rotation trajectory of the injection ports 8a...8f of the washing nozzle 6, the circumferential angular range where the tableware storage basket 2 does not exist, that is, the tableware is Unnecessary and ineffective cleaning water is also injected into spaces that do not exist, and a large amount of ineffective cleaning water power is consumed, resulting in poor energy efficiency. In addition, the structure is such that cleaning water is always jetted simultaneously from multiple injection ports 8a...8f, and a large amount of cleaning water is jetted at the same time, so in order to obtain the necessary jet cleaning discharge pressure, excessive capacity is required. Requires cleaning pump.

Furthermore, it has the disadvantage of generating a high level of cleaning noise due to the use of a large volume of cleaning water and the use of a large capacity pump.

In order to further solve the above problem, the inventors have proposed a dishwasher having a washing nozzle as shown in FIG. 9. In the figure, the cleaning nozzle 6 is equipped with 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. A plurality of wash water guide holes 7a...7f are formed at appropriate axial pitches on the cylindrical side 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 has a plurality of cleaning water guide holes 7a...7f provided in the guide nozzle 5, which are displaced at appropriate circumferential angles in the circumferential direction at axial pitches corresponding to the plurality of cleaning water guide holes 7a...7f. A plurality of cleaning water injection ports 8a, . . . 8f are configured to sequentially pass over the corresponding guide holes 7a . . . 7f. With this configuration, the washing water can be sprayed in a concentrated manner only to a limited space where tableware stored in a single tableware storage basket 2 located in an arbitrary space in the washing tank 1 is present. This eliminates the consumption of ineffective cleaning water power for spaces where there are no tableware to be washed, and at the same time suppresses the amount of cleaning water sprayed from the plurality of injection ports 8a...8f of the cleaning nozzle 6 to the necessary minimum. However, we provide a dishwasher with high cleaning energy efficiency, which reduces the water power required for cleaning by having a structure that can thoroughly wash tableware, and can clean with high jet cleaning discharge pressure even when using a relatively small-capacity cleaning pump. I was able to do it.

Problems to be Solved by the Invention However, in the dishwasher having the structure described above, leftovers such as sesame seeds and rice may be left in the washing water due to forgetting to install a filter (not shown) to collect leftovers. When foreign matter such as sand enters, this foreign matter enters the gap between the cleaning nozzle 6 and the guide nozzle 5, increasing the rotational resistance of the cleaning nozzle 6.
For this reason, there is a problem that the cleaning nozzle 6 rotates incorrectly. In addition, as a countermeasure for this, the cleaning nozzle 6 and the guide nozzle 5
This can be improved by increasing the gap between the guide holes 7a...7f, but in this case, the cleaning water coming out of the guide holes 7a...7f leaks to other injection holes through this gap, resulting in large losses (problems such as lower injection pressure). was there.

The present invention is intended to solve the above-mentioned problems, and the first object of the present invention is to provide a dishwasher that does not cause malfunction of the washing nozzle even if foreign matter enters without reducing the washing energy efficiency. This is what we provide.

Furthermore, a second object of the present invention is to further reduce the possibility of malfunction of the cleaning nozzle by discharging foreign matter that has entered between the cleaning nozzle and the guide nozzle from the injection hole in a short time. To provide a sanitary dishwasher in which leftover food etc. do not remain in a washing nozzle.

Means for Solving the Problems In order to achieve the above object, the present invention provides, as a first means, a washing tank, a tableware storage basket for storing dishes in the washing tank, and a plurality of jets for spraying washing water. The cleaning nozzle is equipped with a cylindrical cleaning nozzle having a hole, and a guide nozzle that is installed inside the cleaning nozzle and has a guide hole that sends cleaning water to the injection hole and a guide tube that guides the cleaning water.

The second means includes a washing tank, a dish storage basket for storing dishes in the washing tank, a cylindrical washing nozzle having a plurality of injection holes for spraying washing water, and a washing nozzle installed inside the washing nozzle. and a guide nozzle having a guide hole that sends cleaning water to the injection hole and a guide tube that guides the cleaning water, and a gap between the tip of the guide tube and the inner surface of the cleaning nozzle is defined by the tip of the guide nozzle. One side is larger than the other.

Effect In the first means described above, when foreign matter such as leftover food or sand gets mixed into the washing water, most of the foreign matter passes through the guide hole and is discharged to the outside of the nozzle, but some of the foreign matter passes through the guide hole. It gets into the gap between the guide cylinder and the cleaning nozzle. At this time, since the width of the guide cylinder is narrow, the increase in the rotational resistance of the cleaning nozzle is small, and the rotation of the cleaning nozzle does not stop. Foreign matter that has entered the gap between the guide tube and the cleaning nozzle enters the gap between the guide nozzle and the cleaning nozzle due to the leakage water flow from the guide hole and the rotation of the cleaning nozzle. Since the gap between the guide nozzle and the cleaning nozzle is larger than the gap between the guide cylinder and the cleaning nozzle, the increase in rotational resistance of the cleaning nozzle is small and the rotation of the cleaning nozzle does not stop. In other words, by increasing the gap between the guide nozzle and the cleaning nozzle, it is possible to prevent rotation failures of the cleaning nozzle caused by foreign matter getting in, and at the same time, the leakage flow of cleaning water can be reduced by increasing the gap between the guide nozzle and the cleaning nozzle. can.

Furthermore, foreign matter that has entered the gap between the guide nozzle and the cleaning nozzle is swept away by the leaking water flow to the tip of the nozzle and accumulates at the tip. Therefore, by increasing the gap between the guide cylinder of the guide hole on the tip side of the guide nozzle and the cleaning nozzle, the water flow from the injection hole at the tip increases, and the foreign matter accumulated at the tip can be expelled from the injection hole to the outside in a short time. This reduces the possibility of rotation failure of the cleaning nozzle (<, and prevents leftover food from remaining in the cleaning nozzle, thereby maintaining hygiene.

EXAMPLE A first example of the present invention will be described below with reference to FIGS. 1 to 4 and 6. The basic configuration of the dishwasher is the same as that shown in FIG. 8, so the same parts are given the same reference numerals. In the figure, cleaning water 11 stored at the bottom of a cleaning tank 1 is pumped through a flow path 12 to a cleaning nozzle 6 by a cleaning pump 4. The tableware 3 stored in the tableware storage basket 2 in the washing tank 1 is cleaned by a cylindrical cleaning nozzle 6 provided on the back side of the tableware storage basket 2 and a guide nozzle 5 provided inside the cleaning nozzle 6. Washed. The cleaning nozzle 6 is mounted so as to rotate around the guide nozzle 5 by a rotation arm 9 that communicates with the guide nozzle 5, and is mounted on a cylindrical side surface of the guide nozzle 5 on the side facing the tableware storage basket 2. That is, on the upper surface side, there are a plurality of cleaning water guide holes 19a provided at appropriate axial pitches.
- 19f, and guide cylinders 20a, 20f for guiding the cleaning water are formed around this guide hole.

Next, details of the guide nozzle 5 and the cleaning nozzle 6 will be explained. The cylindrical side surface of the cylindrical cleaning nozzle 6 has a plurality of cleaning water guide holes 19a...19f provided in the guide nozzle 5 at an axial pitch corresponding to the plurality of cleaning water guide holes 19a, . multiple cleaning water injection ports 8a...
- 8f is provided, and a rotating arm 9 having a propulsion injection port 10 is provided at one end of the nozzle, and a cleaning nozzle 6
The cleaning water injection ports are configured to sequentially pass over the corresponding guide holes by zero rotation. Note that 21 indicates foreign matter such as leftover food that has entered the gap between the guide nozzle 5 and the cleaning nozzle 6.

The operation of the above configuration will be explained. Washing pump 4
The cleaning water 11 force-fed is supplied to the guide nozzle 5 through the square channel 12, and at the same time, the cleaning nozzle 6 is rotated by jetting from the propulsion injection port 10 provided on the rotary arm 9. When any part of the plurality of guide holes of the guide nozzle 5, for example, the injection port 8a of the cleaning nozzle corresponding to the guide hole 19a, overlaps the guide hole 19a on the rotation locus at any point of this rotation, Cleaning water is through guide hole 19
The tableware storage is ejected from the ejection port 8a toward the tray 2 through the ejection port 8a. At this time, the other injection ports 8b...8f are respectively located toward the space where the tableware storage basket 2 does not exist, and the other guide holes 1 corresponding to the respective injection ports are located.
Since the relative positions on the rotation locus of 9b...19f are each slightly displaced, the injection of cleaning water from other injection ports via the guide hole is suppressed, and the flow of the cleaning water between the guide tube and the cleaning nozzle is suppressed. Only a small amount of cleaning water leaks out from the gap. As the cleaning nozzle 6 rotates, operations similar to those described above are sequentially performed at other injection ports and guide holes.

That is, one rotation completes one cycle of injection from each injection port, and this operation is repeated to thoroughly wash all the dishes M3 stored in the dish storage basket 2.

Also.

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...8f and is ejected to the outside of the nozzle, but some of the foreign matter 21 enters the guide holes 19a and 19a.・
- Pass through 19f and enter between the gap between the guide tubes 20a...2Of and the cleaning nozzle 6. At this time, the guide tube 20a...
Since the width of 2Of is narrow and the contact angle in the rotational direction is small, the increase in rotational resistance of the cleaning nozzle 6 is small, so the rotation of the cleaning nozzle 6 does not stop. Guide tube 20a・
...The foreign object 21 that has entered the gap between 20f and the cleaning nozzle 6 is
The leaking water flow from the guide holes 19a...19f and the rotation of the cleaning nozzle 6 enter the gap between the guide nozzle 5 and the cleaning nozzle 6. The gap between the guide nozzle 5 and the cleaning nozzle 6 is the guide tube 20.
Since the gap between a...2Of and the cleaning nozzle 6 is larger than that of the cleaning nozzle 6, the rotational resistance of the cleaning nozzle 6 only increases slightly, and the rotation of the cleaning nozzle 6 does not stop. In other words, by providing a large gap between the guide nozzle 5 and the cleaning nozzle 6, it is possible to prevent rotational failure of the cleaning nozzle 6 caused by foreign matter 21 getting in, and also to prevent cleaning water from flowing through the gap between the guide tube 20g...2Of and the cleaning nozzle 6. Leakage water flow can be reduced. In other words, the amount of cleaning water constantly injected at any point in time when the cleaning nozzle 6 is rotating is equal to the amount injected from one of all the injection ports plus a small amount of leakage from other injection ports. A compact and yet tableware storage basket 2
Since the injection of ineffective cleaning water into a space where there is no space is suppressed, the required cleaning water power is suppressed to the necessary minimum, and cleaning is performed with extremely high efficiency.

Next, a second embodiment of the present invention will be described based on FIGS. 5 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. It is equipped with a cylindrical cleaning nozzle 6 and a guide nozzle 5 provided inside the cleaning nozzle 6, and the cylindrical side surface of the guide nozzle 5 on the side facing the tableware storage basket 2, that is, the upper surface side, is provided with a moderate axial pitch. A plurality of cleaning water guide holes 19a...
19f, the guide hole 19a located on the tip side of the guide nozzle 5 is not provided with a guide cylinder, and the other guide hole 19b is
... 19f are formed with guide tubes 20b...2Of for guiding the cleaning water. In this configuration, foreign matter 21 that has entered the gap between the guide nozzle 5 and the cleaning nozzle 6 is
The leaking water flows toward the tip of the nozzle and collects at the tip.

Therefore, if the guide nozzle 5 is small (both the guide hole 1 on the tip side
Since 9a does not have a guide tube, the water flow from the injection hole at the tip of 5 can be increased, and the foreign matter accumulated at the tip can be discharged from the injection hole 8a in a short time, thereby making it possible to prevent rotation failure of the cleaning nozzle 6. <<, leftover food etc. do not remain in the cleaning nozzle 6, making it sanitary. In this embodiment, in order to make the gap between the tip of the guide tube and the inner surface of the cleaning nozzle larger on the tip side of the guide nozzle than on the other side, the guide hole 1 is
9a is not provided with a guide tube, but each guide hole is provided with a guide tube so that the gap between the inner surface of the cleaning nozzle 6 and the tip of the guide tube becomes larger than that of the guide tube on the tip side. You can.

Effects of the Invention As described above, the present invention prevents the cleaning energy efficiency from decreasing (even if foreign matter enters the cleaning nozzle does not rotate) by forming a guide cylinder around the guide hole to guide the cleaning water. It is possible to provide a dishwasher that does not become defective.

In addition, since the gap between the tip of the guide tube and the inner surface of the cleaning nozzle is larger on the tip side of the guide nozzle than on the other side, foreign matter that has entered between the cleaning nozzle and the guide nozzle can be quickly removed from the injection hole. To provide a sanitary dishwasher in which the washing nozzle can be discharged from the washing nozzle, rotation failure of the washing nozzle is less likely to occur, and leftover food etc. do not remain in the washing nozzle.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view of a dishwasher according to a first embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of a washing nozzle, Fig. 3 is a longitudinal cross-sectional view of a guide nozzle, and Fig. 4 shows both nozzles. FIG. 5 is a longitudinal sectional view of the guide nozzle of a dishwasher according to the second embodiment of the present invention, and FIG.
Figure 7 is an enlarged cross-sectional view of the nozzle mounted as shown in the figure.
, an enlarged cross-sectional view of the nozzle shown in FIG. 5 when it is mounted;
The figure is a longitudinal cross-sectional view of a dishwasher that has been proposed so far, and FIG. 9 is an enlarged cross-sectional view when the same washing nozzle and guide nozzle are installed. 1... Washing tank, 2... Tableware storage basket, 3... Tableware, 4... Washing pump, 5... Guide nozzle, 6...
・Cleaning nozzle, 88~8f... injection port, 19a~19
f... Guide hole, 20a-2Of... Guide tube.

Claims (2)

[Claims] (1) a washing tank, a tableware storage basket for storing dishes in the washing tank, a cylindrical washing nozzle having a plurality of injection holes for spraying washing water, and a washing water A dishwasher comprising a guide nozzle having a guide hole that sends water to the injection hole and a guide tube that guides washing water. (2) a washing tank; a tableware storage basket for storing dishes in the washing tank; a cylindrical washing nozzle having a plurality of injection holes for spraying washing water; a guide nozzle having a guide hole that feeds into the injection hole and a guide tube that guides cleaning water; the gap between the tip of the guide tube and the inner surface of the cleaning nozzle is such that the tip side of the guide nozzle is closer to the other side than the other side; Larger dishwasher.