JPH0731576A - Dish washer - Google Patents

Abstract

PURPOSE:To prevent after-discharge of washing water after the end of washing by forming an open end of the forward end of a washing water pipeline in a recess part formed in the central area of an upper nozzle, and forcing washing water to rise along the wall part of the recess part to be dispersed in the nozzle. CONSTITUTION:A pair of upper and lower washing water jet nozzles are formed in a washing chamber. The tip 23 of a downward part 22 of a washing water pipeline 10 is opened in the central recess part 20 formed on the bottom of the center of an upper washing water nozzle 4. The washing water is jetted from the tip 23 and forced to rise along the wall part of the central recess part 20 to be dispersed in the upper washing water nozzle 4, and the dispersed water is jetted from plural jet ports 11 of the lower surface 21 of the nozzle so that the nozzle 4 is turned around the downward part 22 by the reaction. When washing is completed and the supply of water from the pipeline 10 is stopped, the residual water in the nozzle 4 stays in the central recess part 20 and is caused to flow backward into the pipeline 10 from the downward part 22 by the siphon action. Thus, after-discharge of water from the nozzle 4 after the end of washing can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a dishwasher,
In particular, it relates to the configuration of the wash water nozzle arranged in the upper part of the wash chamber.

[0002]

2. Description of the Related Art In a conventional dishwasher, the
As illustrated in Japanese Patent No. 6905, in order to prevent the washing water from dripping from the injection port of the washing nozzle after the end of the washing process, an opening portion that connects the washing water passage and the rinse water passage is formed. At the end of the cleaning process, the rinse water flows into the cleaning nozzle to dilute the cleaning water inside the cleaning nozzle, but it is difficult to completely clean the inside of the cleaning nozzle with a small amount of rinse water during the cleaning process. However, the diluted cleaning water may drip from the spray nozzle to stain the rinsed dishes. Further, since the rinse water system passage and the rinse water system passage are in communication, it is necessary to provide a check valve in the rinse water system passage to the rinse nozzle so that the wash water does not flow into the rinse water system passage during the cleaning process. There was a problem that the structure became complicated.

Further, as described in Japanese Utility Model Publication No. 4-80471, a rib-shaped wall or the like is formed around the downward spraying nozzle of the washing water nozzle arranged in the upper part of the washing chamber of the dishwasher. There are some that try to prevent dripping from the wash water nozzle, but when the wash water nozzle moves due to shaking of the dishwasher, etc., the wash water passes over the rib-shaped wall and leaves behind from the injection port. There was a risk of dripping, and it was not always possible to achieve the intended purpose.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to reliably prevent the wash water from dripping from the wash water nozzle in a dishwasher with a simple structure.

[0005]

Therefore, in the dishwasher according to the present invention, a washing water nozzle having an injection port formed on the lower surface and a recess lower than the injection port, and the cleaning water nozzle rising from below are provided. Has a flush water pipe line whose tip opens in the recess.

[0006]

Operation: That is, since the tip of the cleaning water pipe opens in the recess lower than the injection port of the cleaning water nozzle, if the injection of cleaning water from the injection port of the cleaning water nozzle stops at the end of the cleaning process, the cleaning water pipe Since the air is sucked into the washing water nozzle from the gap between the passage and the washing water nozzle or from the injection port, the washing water in the washing water nozzle is automatically sucked into the washing water pipe line by the siphon phenomenon and flows down. Since the cleaning water remains in the nozzle only in the recess lower than the injection port, it is easily prevented that the cleaning water drips from the injection port.

[0007]

Embodiments of the present invention shown in the drawings will be specifically described below. An upper washing water nozzle 4, an upper rinsing water nozzle 5, a lower rinsing water nozzle 6 and a lower rinsing water nozzle 7 are arranged in the washing chamber 2 of the dishwasher 1 with the tableware storage rack 3 sandwiched therebetween, and washing is performed. The wash water in the wash water tank 8 installed at the bottom of the chamber 2 is pumped by the wash water pump 9 through the wash water pipe 10 to the upper wash water nozzle 4 and the lower wash water nozzle 6, and both nozzles 4, 6 Is sprayed onto the tableware of the tableware storage rack 3 from the spray port 11 to wash the tableware, and then is collected again in the wash water tank 8 through the filter 12.

On the other hand, the rinse water in the rinse water tank 13 installed in the lower part of the dishwasher 1 is stored in the rinse water pump 14.
Through the rinse water conduit 15 and upward rinse water nozzle 5
And the lower rinse water nozzle 7 is pumped to both nozzles 5, 7,
Is sprayed from the spray port 16 of the dish storage rack 3 to rinse the dishes, then flows through the filter 12 into the wash water tank 8 to mix with the wash water, and the excess is drained from the overflow pipe 17. In addition, the rinse water conduit 1 directly below the lower rinse water nozzle 7 is provided.
5 is provided with a check valve 18 so that the cleaning water flows into the injection port 16 of the lower rinse water nozzle 7 during the cleaning process, passes through the rinse water pump 14 and flows back into the rinse water tank 13. Is being prevented.

The upper washing water nozzle 4 has a lower surface 21 which is inclined to the outside on the left and right sides of the central recess 20, and a plurality of injection ports 11 are formed in the lower surface 21 to descend the washing water conduit 10. It is supported so as to be rotatable around the portion 22, and a small gap is provided between it and the outer periphery of the washing water pipe descending portion 22, and the tip 23 of the washing water pipe 10 is a central recess of the upper washing water nozzle. It is open close to the bottom of 20.

Therefore, as described above, when the washing water is sprayed from the ejection ports 11 of the upper washing water nozzle 4 and the lower washing water nozzle 6 to the dishes of the dish storage rack 3 and the washing is completed, the washing water pump 9 Although the pressure-feeding of the wash water by the above is stopped, at this time, the wash water filled in the upper wash water nozzle 4 flows out into the washing chamber 2 from each jet port 11, and the upper wash water nozzle 4 is washed. Since air is sucked from the small gap with the water pipe descending portion 22 or the jet port 11, the washing water is automatically sucked into the washing water pipe 10 by the siphon phenomenon and flows down, and is returned to the washing water tank 8. The wash water is quickly discharged from the upper wash water nozzle 4 and remains only slightly at the bottom of the upper recess 20 of the upper wash water nozzle, and no wash water remains near the jet port 11 of the inclined lower surface 21.

Therefore, after the washing process, the washing water does not drip from the jet port 11 of the upper washing water nozzle 4, and the dishes in the rinsed dish storage rack 3 can be easily contaminated by the washing water. Therefore, since it is not necessary to wash the inside of the upper washing water nozzle 4 with rinsing water, the amount of rinsing water can be saved and the rinsing water pipe line 15 to the upper rinsing water nozzle 5 can be reduced as in the conventional case. Since there is no need to install a check valve in, there is an advantage that the entire structure is simplified and there is little risk of malfunction or failure.

[0012]

In the dishwasher according to the present invention,
If the tip of the washing water pipe opens in a recess lower than the jet port of the wash water nozzle and the jet of wash water is stopped from the jet port of the wash water nozzle at the end of the washing process, the washing water nozzle will be washed. The water is automatically sucked into the washing water pipe by the siphon phenomenon and flows down, and the washing water remains only in the recesses lower than the jet port in the washing water nozzle. The dishwasher in the rinsed washing room is prevented from being contaminated by the washing water, so that the washing water nozzle does not need to be rinsed after the washing process, which facilitates the construction of the dishwasher. Can be simplified to

[Brief description of drawings]

FIG. 1 is a schematic layout diagram in an embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional view of a main part of the above embodiment.

[Explanation of symbols]

 1 Dishwasher 4 Upper Wash Water Nozzle 10 Wash Water Pipeline 11 Jet Port 15 Rinse Water Pipeline 20 Central Recess 23 End of Washwater Pipeline

Claims (1)

[Claims] 1. A dishwasher having a washing water nozzle having an injection port formed on a lower surface and having a recess lower than the injection port, and a cleaning water pipe line which rises from below and has a tip opening in the recess of the cleaning water nozzle. .