JPH04338438A - Dish washer - Google Patents

Abstract

PURPOSE:To offer a low-noise household dish washer having a high cleaning performance. CONSTITUTION:A rotary washing nozzle head 23 is mounted on a washing pump 22 which pressurizes washing water 1. Diffusively spraying nozzles 5 are arranged in an area along the circumference of the rotary washing nozzle head 23 and spray washing water in a fan-like shape, and straight spray nozzles 2 are arranged in the other area than along the circumference.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for general household use.

0002

BACKGROUND OF THE INVENTION The injection holes used in conventional dishwashers will be explained below. In FIG. 6, 1 is the washing water that cleans the dirt on the dishes, 2 is the concentrated injection hole that sprays the washing water 1, 3 is the flow vector of the washing water 1 flowing into the concentrated injection hole 2, and 4 is the concentrated injection hole 2 5 is the diffusion injection hole that sprays the cleaning water 1, 6 is the cleaning water 1
7 is the flow vector of the cleaning water 1 flowing into the diffusion injection hole 5, and 8 is the diffusion injection hole 5.
The spray pattern of the cleaning water 1 emitted from the is shown.

As shown in FIG. 6(b), the concentrated injection hole 2
The cleaning water 1 discharged from the central injection hole 2 has a rod-shaped injection pattern that maintains the cross-sectional shape of the concentrated injection hole 2. The shape of the concentrated injection hole 2 in this conventional example is a round hole, but there are also square holes. Also, Figure 6
As shown in (d), the cleaning water 1 coming out of the diffusion injection hole 5 has a small cross-sectional area compared to the cross-sectional area of the inflow pipe 6 and the deflection flow velocity is large, so that a contraction force acts in the thickness direction of the flow. It spreads in the width direction.

In FIG. 7, 9 shows the pressure distribution of the concentrated injection hole 2, and 10 shows the pressure distribution of the diffused injection hole.The horizontal axis shows the horizontal distance from the center of the injection hole, and the vertical axis shows the pressure. As is clear from the figure, the pressure distribution of the cleaning water 1 injected from the concentrated injection holes 2 is very high, but the pressure distribution range is narrow. Further, the pressure distribution 10 of the cleaning water 1 injected from the diffusion injection hole 5 has a wide pressure distribution range, but the pressure is low.

A conventional dishwasher has a washing nozzle (with a plurality of either the concentrated injection holes 2 or the diffused injection holes 5).
(not shown).

[0006]

[Problems to be Solved by the Invention] However, in conventional dishwashers, when the washing nozzle is provided with a concentrated injection hole 2, the injection pressure of the washing water 1 is high and the washing power is high, but because the pressure distribution range is narrow, it is difficult to wash the dishes. Areas not exposed to water 1 (Washing water 1
(referred to as yin) is more likely to occur. Furthermore, in order to reduce this shadow, the number of concentrated injection holes 2 must be increased, which increases the amount of washing water. Further, there was a problem that the cleaning water 1 coming out of the concentrated injection hole 2 on the outermost periphery hits the side wall surface of the cleaning tank, and the injection pressure of the cleaning water 1 at that time is high, resulting in increased cleaning noise.

Furthermore, when the cleaning nozzle is provided with the diffusion injection holes 5, the pressure distribution of the cleaning water 1 is wide, so the shadow of the cleaning water 1 is reduced, and the number of diffusion injection holes 5 can be reduced, thereby reducing the amount of cleaning water. It can be reduced. Further, even if the cleaning water 1 coming out of the outermost diffusion injection hole 5 hits the side wall surface of the cleaning tank, the injection pressure of the cleaning water 1 at that time is low, so the cleaning noise is reduced. However, since the injection pressure of the cleaning water is low, the cleaning power is weak, and it is necessary to increase the pressure of the cleaning nozzle or lengthen the cleaning time.

[0008] In addition, dishes in the corners of the washing tank (not shown) may not be sufficiently cleaned because the trajectory of the injection holes cannot reach them.As a solution to this problem, injection holes are provided at both ends of the outermost periphery of the washing nozzle. There is a method of increasing the energy density, but in this case there is a problem that the number of injection holes increases and the amount of washing water increases.

In view of the above problems, the first object of the present invention is to provide a dishwasher with high cleaning performance and low cleaning noise.

[0010] A second object is to provide a dishwasher that reduces the number of injection holes to reduce the amount of washing water, has high washing performance, and has low washing noise.

A third object of the present invention is to provide a dishwasher in which the cleaning power for dishes at the corners of the washing tank is improved without increasing the number of injection holes and the amount of washing water.

0012

[Means for Solving the Problems] In order to achieve the above-mentioned first object, the first means of the present invention includes a washing tank, a tableware storage basket in which dishes are placed, and a washing machine that circulates washing water in the washing tank. A washing nozzle having a pump and a spray hole for spraying washing water onto the dishes, the spray hole located at the outermost periphery of the cleaning nozzle having a diffusion spray hole for spraying a diffused water flow,
The other injection holes are provided with concentrated injection holes that eject rod-shaped water streams.

Further, in order to achieve the second object, a second means of the present invention includes a washing tank, a tableware storage basket for storing the dishes, a washing pump for circulating the washing water in the washing tank, and a washing pump for circulating the washing water in the washing tank. The first cleaning nozzle includes a first cleaning nozzle having an injection hole for injecting cleaning water, and a second cleaning nozzle rotatably provided on the first cleaning nozzle. The second cleaning nozzle is provided with a diffused spray hole that sprays a water stream, and the second cleaning nozzle is provided with a concentrated spray hole that sprays a rod-shaped water stream. It is set within the rotation locus of the diffusion injection hole on the outermost periphery of the nozzle.

Further, in order to achieve the third object, a third means of the present invention includes a washing tank, a tableware storage basket for storing the dishes, a washing pump for circulating the washing water in the washing tank, and a washing pump for circulating the washing water in the washing tank, and a washing tank for storing the dishes. A first cleaning nozzle having an injection hole for injecting cleaning water to The cleaning nozzle is provided with a diffusion injection hole that sprays a diffused water stream at least at the outermost injection hole.

[0015]

[Operation] The first means is to provide a diffusion injection hole that sprays a diffused water stream as an injection hole located at the outermost periphery of the cleaning nozzle, so that the cleaning water coming out of the diffusion injection hole hits the side wall surface of the cleaning tank. Also, since the jetting pressure of the cleaning water at that time is low, the cleaning noise is also low. By providing the other injection holes as concentrated injection holes that eject rod-shaped water streams, the injection pressure of the cleaning water is high and the cleaning power is increased. Note that the washing water emitted from the injection holes other than the outermost periphery hits the washing tank wall after hitting the dishes, etc., so even if the injection holes are concentrated injection holes, there is little effect on the cleaning noise.

Further, the second means includes a first cleaning nozzle and a second cleaning nozzle rotatably provided above the first cleaning nozzle. In addition, by providing at least the outermost periphery with a diffusion injection hole for ejecting a diffused water stream, cleaning noise can be reduced in the same way as described above. In addition, the injection hole provided in the second cleaning nozzle is a concentrated injection hole that sprays a rod-shaped water stream, so that the concentrated injection hole can combine the circular motion caused by the rotation of the first cleaning nozzle with the second cleaning nozzle. It is a combination of two circular motions caused by rotation, and even with a small number of concentrated injection holes, the shadow of the cleaning water is reduced, improving cleaning performance and reducing the amount of cleaning water used. . Furthermore, the second
By setting the rotation locus of the concentrated injection hole provided in the first cleaning nozzle within the rotation trajectory of the outermost diffused injection hole provided in the first cleaning nozzle, the cleaning water coming out of the injection holes other than the outermost periphery is Since the spray hits the washing tank wall after hitting the dishes, even if the injection holes are concentrated injection holes, there is little effect on the washing noise.

[0017] Furthermore, in the third means, by providing at least the outermost periphery of the first cleaning nozzle and the second cleaning nozzle with a diffusion injection hole for injecting a diffusion water stream, the noise of cleaning can be reduced and The spray holes can be extended to the movable range of the cleaning nozzle, and the cleaning performance for dishes placed in corners can be improved without increasing the number of spray holes.

[0018]

Embodiment 1 A first embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, parts that are the same as those of the prior art are given the same reference numerals. 20 is a cleaning tank, 21 is a water supply valve that supplies the cleaning water 1 into the cleaning tank 20, 22 is a cleaning pump, and 23 is a cleaning nozzle, which is rotatably attached to the cleaning pump 22. The outermost periphery of the cleaning nozzle 23 is provided with a diffusion injection hole 5 for spraying the cleaning water 1 pressurized by the cleaning pump 22 in a fan-shaped manner, and the other injection holes are provided with concentrated injection holes 2. There is. 24
is a filter that collects leftovers, 25 is a drainage pump, 26
27 is a drain port provided at the bottom of the filter 24 and communicates with the suction port of the cleaning pump 22 and the suction port of the drain pump 25; 27 is a tableware basket for storing items to be washed such as dishes in the washing tank 20; and 28
2 is a heater that heats the washing water 1, and 29 is a tableware.

The operation of the above configuration will be explained below. Add a predetermined amount of detergent and place the tableware 29 in the washing tank 20.
Store it inside and start driving. First, by energizing the water supply valve 21, the cleaning water 1 is supplied. When the cleaning water 1 reaches a predetermined amount, the cleaning pump 22 pressurizes the cleaning water 1 containing detergent and supplies it to the cleaning nozzle 23 . The cleaning water 1 supplied to the cleaning nozzle 23 is injected from the concentrated injection hole 2 and the diffused injection hole 5. In addition, an injection reaction force is generated by the cleaning water 10 being injected from the concentrated injection hole 2 and the diffused injection hole 5.
The cleaning nozzle 23 causes a rotational movement. Then, a main washing process is performed in which the dishes 29 in the dish basket 27 are washed by spraying from the washing nozzle 23. At this time, the heater 28 is energized and the cleaning water 1 is heated. After the temperature of the washing water 1 reaches a predetermined level, the main washing step ends. After the main washing process is completed, the operation is completed through a rinsing process and a drying process.

According to the above configuration, the injection hole 5 located at the outermost periphery of the cleaning nozzle 23 sprays a diffused water stream.
By doing so, even if the cleaning water 1 coming out of the diffusion injection hole 5 hits the side wall surface of the cleaning tank 20, the cleaning noise is reduced because the injection pressure of the cleaning water 1 at that time is low. By providing the other injection holes as concentrated injection holes 2 that eject a rod-shaped water stream, the injection pressure of the cleaning water 1 is high and the cleaning power is increased. In addition, the washing water 1 coming out from the injection holes other than the outermost periphery is the tableware 29.
After hitting the wall surface of the cleaning tank 20, even if the injection hole is the concentrated injection hole 2, the effect on the cleaning noise is small.

As described above, according to this embodiment, the injection hole located at the outermost periphery of the cleaning nozzle 23 is the diffusion injection hole 5 that sprays a diffused water stream, and the other injection holes spray a rod-shaped water stream. By providing the concentrated injection holes 2, it is possible to provide a dishwasher with high cleaning performance and low cleaning noise.

(Embodiment 2) A second embodiment of the present invention will be described below with reference to the drawings. In Figure 2,
Since many of the mechanical parts are the same as those in the first embodiment and are shared, some explanations will be omitted. In FIG. 2, 30 is a first cleaning nozzle, which is rotatably attached to the cleaning pump 22. 31 is a second cleaning nozzle;
It is rotatably mounted on the first cleaning nozzle 30. The first cleaning nozzle 30 is provided with a diffused injection hole 5, and the second cleaning nozzle 31 is provided with a concentrated injection hole 2. Further, the rotation trajectory of the concentrated injection hole 2 provided in the second cleaning nozzle 31 is within the rotation trajectory of the diffused injection hole 5 provided in the first cleaning nozzle 30. Note that the operating method is the same as that of the first embodiment, and a description thereof will be omitted.

FIG. 3 shows the trajectory 32 of the diffused injection hole 5 of the first cleaning nozzle 30 and the concentrated injection hole 2 of the second cleaning nozzle 31.
A trajectory 33 is shown. The locus 33 of the concentrated injection hole 2 is a combination of the circular movement of the rotation center of the second cleaning nozzle 31 due to the rotation of the first cleaning nozzle 30 and the circular movement of the second cleaning nozzle 31 itself, and the trajectory 33 of the concentrated injection hole 2 2 also eliminates the shadow of the washing water 1 and can thoroughly wash the washing area thoroughly. Therefore, by minimizing the number of concentrated jet holes 2 of the second cleaning nozzle 31, the amount of cleaning water 1 can be reduced. In addition, by making the cleaning area of the concentrated injection hole 2 provided in the second cleaning nozzle 31 smaller than the rotation locus of the diffused injection hole 5 provided in the first cleaning nozzle 30, the cleaning water 1 hitting the cleaning tank 20 can be cleaned. Noise can be reduced.

As described above, according to the second embodiment, the second cleaning nozzle 31 is provided rotatably above the first cleaning nozzle 30. The second cleaning nozzle 31 is provided with a diffused spray hole 5 that sprays a diffused water stream, and the second cleaning nozzle 31 is provided with a concentrated spray hole 2 that sprays a rod-shaped water stream. By setting the rotational locus of the concentrated injection hole 2 provided at 31 within the rotational trajectory of the diffused injection hole 5 provided at the outermost periphery of the first cleaning nozzle 30, the amount of water used for washing can be reduced, and the amount of washing water can be reduced. A dishwasher with high performance and low cleaning noise can be provided.

(Embodiment 3) A third embodiment of the present invention will be described below with reference to the drawings. In Figure 4,
A first cleaning nozzle 34 is rotatably attached to the cleaning pump 22. A second cleaning nozzle 35 is rotatably mounted on the first cleaning nozzle 34. The first cleaning nozzle 34 is provided with a diffused injection hole A36, the second cleaning nozzle 35 is provided with a diffused injection hole B37 at its outermost periphery, and concentrated injection holes 2 are provided elsewhere.

Furthermore, as shown in FIG. 5, the diffusion injection hole A3
6 rotation locus 38 and the rotation locus 39 of the diffusion injection hole B37
The outer peripheries of the two are aligned. In addition, 40 is the concentrated injection hole 2
shows the trajectory of The operating method in this embodiment is the same as that in the first embodiment, and the explanation will be omitted.

As shown in FIG. 5, as in the second embodiment, even with just one injection hole on the second cleaning nozzle 35, the shadow of the cleaning water 1 can be eliminated and the cleaning area can be thoroughly cleaned thoroughly. Also,
The injection holes that clean in the maximum cleaning area are the diffusion injection hole A36 and the diffusion injection hole B37, and by cleaning the maximum cleaning area with two injection holes, it is possible to reduce the cleaning noise.
In particular, the cleaning power of dishes in the corner of the washing tank is improved.

Furthermore, by making the cleaning area of the concentrated injection hole 2 provided in the second cleaning nozzle 35 smaller than the rotation locus of the diffused injection hole 36 provided in the first cleaning nozzle 34, the cleaning tank 20
The noise of the washing water 1 hitting the water can be reduced and quietness can be achieved.

[0029]

As described above, according to the present invention, the injection holes located at the outermost periphery of the cleaning nozzle are provided with diffused injection holes that eject a diffused water stream, and the other injection holes are provided with concentrated injection holes that eject a rod-shaped water stream. By providing this, it is possible to provide a dishwasher with high cleaning performance and low cleaning noise.

[0030] Furthermore, a second cleaning nozzle is provided rotatably above the first cleaning nozzle, and the first cleaning nozzle is provided with a diffusion injection hole for spraying a diffused water stream. The second cleaning nozzle is provided with a concentrated injection hole that injects a rod-shaped water stream, and the rotation locus of the concentrated injection hole provided in the second cleaning nozzle is similar to that of the outermost diffused injection hole provided in the first cleaning nozzle. By setting the rotation locus within the range, the amount of washing water can be saved, and a dishwasher with high washing performance and low washing noise can be provided.

Furthermore, a second cleaning nozzle is provided rotatably above the first cleaning nozzle, and a diffused water stream is sprayed onto at least the outermost periphery of the first cleaning nozzle and the second cleaning nozzle. By providing the diffusion injection holes, it is possible to provide a dishwasher that improves the ability to clean dishes at the corners of the washing tank without increasing the amount 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 cross-sectional view of a dishwasher according to a second embodiment of the present invention.

[Fig. 3] A diagram showing the locus of the injection hole in the second embodiment of the present invention.

FIG. 4 is a vertical sectional view of a dishwasher according to a third embodiment of the present invention.

[Fig. 5] A diagram showing the locus of the injection hole in the second embodiment of the present invention.

[Figure 6] Diagram showing the flow vector and jet pattern of each jet hole of a dishwasher

[Figure 7] Diagram showing the distance from each injection hole of the dishwasher and the magnitude of pressure

[Explanation of symbols]

2. Concentrated injection hole 5 Diffusion injection hole 20 Cleaning tank 22 Washing pump 23 Cleaning nozzle 27 Tableware basket 30, 34 First cleaning nozzle 31, 35 Second cleaning nozzle 36 Diffusion injection hole A 37 Diffusion injection hole B

Claims (3)

[Claims] [Claim 1] A washing tank, a tableware storage basket for storing tableware,
A washing pump that circulates the washing water in the washing tank, and a washing nozzle having a spray hole that sprays the washing water onto the dishes, and sprays a diffused water stream to the spray hole located at the outermost periphery of the washing nozzle. A dishwasher that is equipped with a diffused spray hole that sprays a stream of water, and other spray holes that have a concentrated spray hole that sprays a rod-shaped water stream. [Claim 2] A washing tank and a tableware storage basket for storing tableware;
a washing pump that circulates washing water in the washing tank; a first washing nozzle having an injection hole that sprays washing water onto the dishes; and a second washing nozzle that is rotatably provided on the first washing nozzle. The first cleaning nozzle is provided with a diffusion injection hole for ejecting a diffused water stream, and the second cleaning nozzle is provided with a concentrated injection hole for ejecting a rod-shaped water stream. A dishwasher in which the rotation locus of a concentrated injection hole provided in the first washing nozzle is set within the rotation trajectory of the outermost diffused injection hole provided in the first washing nozzle. [Claim 3] A washing tank and a tableware storage basket for storing tableware;
a washing pump that circulates washing water in the washing tank; a first washing nozzle having an injection hole that sprays washing water onto the dishes; and a second washing nozzle that is rotatably provided on the first washing nozzle. What is claimed is: 1. A dishwasher comprising: a washing nozzle, the first washing nozzle and the second washing nozzle each having at least an outermost injection hole provided with a diffusion injection hole for ejecting a diffused water stream.