JPS6348537B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dishwasher that alternately supplies washing water to two washing nozzles arranged in a washing tank by repeatedly activating, stopping and operating a washing pump. The purpose of the present invention is to automatically switch the water supply without requiring any reversing operation of the cleaning pump or any complicated switching operation or switching structure, and to obtain effective cleaning performance with a small amount of water.

Conventional methods for switching the water supply direction in this type of dishwasher include switching the rotational direction of a runner in a washing pump, and some also include a valve or the like for switching. but,
Pumps that can change the direction of rotation of the runner are limited to friction pumps, that is, Wesco type pumps. For example, in a spiral pump or an axial flow pump, the direction of rotation cannot be changed.

Regardless of the type of pump used, the present invention alternately supplies water to two water channels to ensure that dishes are thoroughly washed with a small amount of water.Examples of the present invention will be described below. do.

Figure 1 shows the configuration of a typical dishwasher.
is the main body of the dishwasher, 2 is a washing tank installed in the main body 1, and 3 is a washing pump for circulating washing water. A lower nozzle bearing 4 is fixed as shown. 5 is a lower washing nozzle, and 6 is a lower tableware basket.

Reference numeral 7 denotes a discharge hose for the upper nozzle, which is branched from the discharge port side of the cleaning pump 3 and guided to the upper surface of the cleaning tank 2. 8 is a vertical pipe connected to the discharge hose 7;
It is fixed to the upper tableware basket 9. Reference numeral 10 denotes an upper nozzle bearing, which rotatably supports the upper cleaning nozzle 11. 12 is a leftover filter, which is provided at the bottom of the cleaning tank 2.

Next, the configuration of the discharge port side of the cleaning pump 3, which is an embodiment of the present invention, will be described. In FIGS. 2 and 3, 13 is a runner of the cleaning pump 3, 14 is a discharge port of the same pump 3, and has a substantially Y-shaped branch portion 14a, whose main path 14b is inside the chamber 3a of the pump 3. The left and right branch roads 14c, 14
d communicates with a first water channel 7a formed by the discharge hose 7 and a second water channel 5a leading to the lower cleaning nozzle 5, respectively.

Reference numeral 15 denotes a stopper provided in the main passage 14b, on which a spherical valve body 16 rests under its own weight when it is not receiving the discharge pressure of the cleaning pump 3. Valve seats 17a and 17b are formed on the inner surfaces of the branch passages 14c and 14d, and the valve body 16 contacts them in a liquid-tight manner.

Reference numeral 18 denotes a boundary between the branch roads 14c and 14d, which protrudes toward the main road 14b.
A slider 19 that can be freely retracted and retracted is disposed inside the slider d, and a guide body 20 is disposed with one end locked to the slider 19 and the other end protruding toward the main path 14b. The central part is rotatably supported.

In the above configuration, the operation will be explained next. First, by rotating the runner 13 in the direction of arrow a in FIG. 2, cleaning water is sent out from the cleaning pump 3. This cleaning water floats the valve body 16 due to its force and is guided to the second water channel 5a side at the tip of the guide body 20 as shown in FIG. 3B, and finally the valve body 16 as shown in FIG. 3C. When it comes into contact with the seat 14d, the water supply to the lower cleaning nozzle 5 is stopped. As a result, water is supplied to the upper cleaning nozzle 11 only through the first water channel 7a, and cleaning water is injected.

At this time, the valve body 16 presses one end of the slider 19, and this press causes the tip of the guide body 20 to change direction as shown in FIG. 3C.

Next, when the operation of the cleaning pump 3 is stopped, the valve body 1
6 is positioned on the stopper 15 in the main path 14b due to its own weight.

When the cleaning pump 3 is operated again, the valve body 16 floats due to the discharge pressure of the cleaning water, is guided by the tip of the guide body 20, and shifts to the state shown in FIG. 2. As a result, the lower cleaning nozzle 5 sprays cleaning water, and the upper cleaning nozzle 11 does not spray water.

By repeating the operation, stop, and operation of the cleaning pump 3 as described above, water is alternately injected from both the cleaning nozzles 5 and 11, so that the injection water pressure is as follows.
Compared to the case where water is supplied to both cleaning nozzles at once, the cleaning performance is improved, and the amount of cleaning water can be reduced, making it possible to reduce the output of the cleaning pump 3.

Furthermore, since the cleaning direction can be switched by controlling the operation and stop of the cleaning pump 3, the same effect can be obtained using any type of pump, and there is no need for complicated switching operations or switching mechanisms. etc. is not required.

In addition, since a guide body is provided that is switched by the pressing operation of the spherical valve body, it is possible to prevent the switching state from becoming irregular due to the strength of water pressure, and the water flow can always be switched regularly.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional view of a typical dishwasher, Fig. 2 is a sectional view showing the discharge side structure of the washing pump, and Fig. 3 A, B, and C are for explaining the channel switching operation on the discharge side. FIG. 2...Cleaning tank, 3...Cleaning pump, 5, 11...
...Washing nozzle, 5a, 7a...First and second water channels, 14...Discharge port, 14a...Branch portion, 14b
...Main road, 14c, 14d... Branch road, 16...
Valve body, 18... border part, 20... guide body.

Claims (1)

[Claims] 1 A dishwasher that injects washing water discharged from a discharge port of a washing pump into a washing tank, which is provided with a water channel that branches the water discharged from the washing pump into two directions, and has ends of these two water channels separated. Each of the valve bodies communicates with the cleaning nozzles arranged in the cleaning tank, and the branch part has a valve body that alternately closes the openings of the two water channels by receiving the discharge pressure of the cleaning pump across the stoppage of the cleaning pump. In addition, the branch part is formed into a Y-shape, and the left and right branch passages thereof communicate with the water channel, and a stopper is provided in the main passage at the bottom to support a spherical valve body when the washing pump is stopped, and the left and right branch passages are provided with a stopper that supports the spherical valve body when the washing pump is stopped. is provided with a valve seat on which the valve body abuts, and at the boundary between the left and right branch passages, the valve body located in one of the branch passages is press-operated to prevent the above-mentioned valve seats from being pressed during the next discharge after the cleaning pump is stopped. A dishwasher equipped with a guide body that guides the valve body into the other branch path.