JPS6312841Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to dishwashers, and in particular relates to improvements to the drain pump portion thereof.

(b) Prior Art Figure 1 shows a conventional tabletop dishwasher a. This device is constructed by mounting a cleaning tank c inside a container body b, and a lid body d is attached on top of the cleaning tank c. A washing water nozzle e is provided in the washing tank c, and the washing water spouted from the washing water nozzle e washes the dishes stored in the tableware basket f. g and h are a circulation pump and its operating motor, which constitute a cleaning water circulation supply mechanism;
i, j are the drainage pump and its operating motor. During cleaning, the circulation pump g operates, and the cleaning water collected in the cleaning tank c is circulated and supplied to the cleaning water nozzle e for injection. After the cleaning or rinsing step is completed, the drain pump i is activated and the cleaning water or rinsing water in the cleaning tank c is discharged to the outside. FIG. 2 shows a longitudinal cross-sectional configuration of a conventional drainage pump i. Predetermined storage level of cleaning water in cleaning tank c
WL is the rotating shaft k that protrudes below the operating motor j
Therefore, when cleaning water is stored, the rotating shaft k becomes submerged in the cleaning water up to that height. Therefore, the rotating shaft k is likely to corrode very easily, and an expensive but corrosion-resistant stainless steel rod must be used as the rotating shaft. l is the impeller. FIG. 3 shows another example of a conventional rotating shaft portion. In this product, only the portion exposed to the washing water is made of the corrosion-resistant member m, but there is a problem with ease of assembly and the cost is also high.

(c) Purpose of the invention This invention was made in view of the above points, and provides a dishwasher in which the rotating shaft of the operating motor of the drain pump does not come into contact with wash water and does not require the use of expensive corrosion-resistant materials for the rotating shaft. This is what I am trying to do.

(d) Structure of the invention In this invention, the boss part of the impeller attached to the end of the rotating shaft of the operating motor of the drainage pump is elongated.The more detailed structure is as follows.
A cleaning system in which a cleaning tank is installed inside the container body, a cleaning water nozzle that spouts cleaning water is provided in the cleaning tank, and the cleaning water stored in the cleaning tank inside the container body is circulated to the cleaning water nozzle. In a dishwasher equipped with a water circulation supply mechanism, a drain pump for discharging wash water from a washing tank, and its operating motor, the operating motor of the drain pump is located above the drain pump and on the side of the washing tank. An impeller is located inside the drainage pump, and its rotating shaft protrudes downward within a communication pipe that communicates the operating motor and the drainage pump, and is attached to the end of the rotating shaft. The end-mounted dishwasher is such that the upper end of the impeller boss is located above a predetermined reservoir level of wash water in the wash tank.

(e) Examples Examples of this invention will be described below in detail with reference to the drawings, but this invention is not limited to the following examples.

The overall configuration of the dishwasher is the same as that shown in FIG. 1, so a description thereof will be omitted.

FIG. 4 shows the construction of one part of the drainage pump of this invention. The operating motor 2 of the drain pump 1 is located above the drain pump 1 and on the side of the cleaning tank 3. The rotary shaft 4 protrudes downward into the communication pipe 5. The communication pipe 5 is actually provided continuously and integrally with the pump case 6. An impeller 7 that rotates within the drainage pump 1 is attached to the end of the rotating shaft 4.
As a result of the rotation, drainage is performed in the direction of the arrow in the drainage pump 1. The impeller 7 has its boss part 8
The end of the rotating shaft 4 is screwed into the interior of the boss 8, which is longer than that shown in the conventional example. It is positioned relatively above the storage level WL. By doing this, the rotating shaft 4 is always prevented from coming into contact with cleaning water, and there is no fear of corrosion, so the rotating shaft 4 is made of steel.

(f) Effects of the invention This invention is constructed as described above, and there is no fear that the rotating shaft of the drain pump motor will be corroded by wash water, so it can be used instead of an expensive stainless steel rotating shaft. A dishwasher made of inexpensive steel can be used, and the overall cost of the dishwasher is low.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing the overall configuration of a conventional general dishwasher, Figures 2 and 3 are vertical cross-sectional views showing the conventional drain pump configuration, and Figure 4 is the drain pump configuration of this invention. It is a longitudinal cross-sectional view of an example. DESCRIPTION OF SYMBOLS 1... Drain pump, 2... Drain pump operation motor, 3... Washing tank, 4... Rotating shaft, 5... Communication pipe, 7... Impeller, 8... Boss portion.

Claims (1)

[Scope of utility model registration request] A cleaning tank is installed inside the container body, and a cleaning water nozzle that spouts cleaning water is provided in the cleaning tank.
a cleaning water circulation supply mechanism that circulates and supplies cleaning water stored in a cleaning tank inside the container body to a cleaning water nozzle;
Furthermore, in a dishwasher that is provided with a drain pump that discharges wash water from a washing tank and its operating motor, the operating motor of the drain pump is located above the drain pump and to the side of the washing tank. and an impeller whose rotating shaft projects downward within a communication pipe that communicates the operating motor and the drainage pump and is attached to the end of the rotating shaft is located in the drainage pump, and the impeller is attached to the end of the rotating shaft by: A dishwasher in which the upper end of the boss portion of the impeller is located above a predetermined storage level of washing water in a washing tank.