JPH0249727B2 - SHOTSUKISEN JOKI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the path of wash water in a dishwasher, particularly in the wash and drain stages, as well as in the filter structure for overtime collection.

In conventional dishwashers of this type, a water receiver is provided at the bottom of the washing tank to receive the washing water led to the washing pump, and a water receiver connected to the drain pump is separately provided, which requires a large volume. However, the size of the cleaning tank cannot be avoided, and the material costs and assembly man-hours also increase, making the cleaning tank expensive.

The present invention integrates the water receivers of a cleaning pump and a drainage pump, and forms a connection port for an air trap in the water receiver to operate a water level control switch.
To provide a dishwasher having a compact and easy-to-assemble water tray and filter structure.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a cleaning tank, which includes a cleaning nozzle 4 that spouts pressurized cleaning water from a pump 3 driven by a cleaning motor 2;
5. Baskets 6 and 7 for storing tableware, and a heater 8 for washing and rinsing with hot water and drying by heating in the air are respectively housed.

9 is a large filter having a large number of small holes 10;
It is formed from a metal plate with small holes drilled in advance before being processed into the shape shown in FIGS. 2 and 3. 11 is a handle made of synthetic resin or the like;
At one end is a claw 12 for attaching to the small filter 9.
However, a frame portion 14 into which the small filter 13 is fitted and supported and a claw 15 are formed at the other end, respectively.
It is attached to the large filter 9 using the elasticity of the resin.

The small filter 13 is made of synthetic resin or the like with a specific gravity exceeding 1, and has a symmetrical shape, with approximately rectangular holes 16 and 17 bored in the bottom, and a center hole in both sides. A circular small hole 18 is formed in the center portion, and rectangular holes 19 are formed inwardly on both sides of the center portion.

Reference numeral 20 denotes a water receptacle fixed to the cleaning tank 1 through a packing 21 and tightened with screws 22. The water receptacle 20 has a partition wall 23 for housing the filter 13 and a notch 24 formed integrally with it, and communicates with the pump 3 in the vicinity of the notch 24. A discharge port 25 is formed. A connection port 28 communicating with an air trap 27 for operating a water level control switch 26 and a drain port 29 communicating with a drain pump (not shown) are provided in the partition wall 23, respectively.

During washing, the washing water passes through the small hole 10 of the large filter 9 and is guided from the discharge port 25 to the pump 3, where it is pressurized and jetted out from the nozzles 4 and 5 to wash the dishes.

The small hole 18 of the small filter 13 is the large filter 9
It has a smaller diameter than the small hole 10 of , and communicates with the discharge port 25 through the notch 24, but the flow rate of water is small.

The cleaning water level is controlled by applying air pressure to the switch 26 in an air trap 27 connected to a connection port 28 through rectangular holes 16 and 17.

After a meal, any residue left on dishes is usually removed, then washed in a dishwasher, rinsed, and dried.
The residue will never be completely removed. Of the residue attached to this tableware, large filter 9
Smaller holes 10 are circulated during cleaning.
Washing water is also sucked in through the small holes 18 of the small filter 13, but since the hole area of the small holes 18 is small, the amount of water is very small. During drainage, the cleaning water is drained through the rectangular holes 16 and 17 of the small filter 13, the gap between the rectangular hole 19 and the partition wall 23, and the small hole 18. Small hole 18 is small hole 1 of large filter 9
Although it is less than 0, no residue remains on the surface after washing and rinsing. Therefore, when rinsing is performed by washing and replacing water, the residue that can pass through the rectangular holes 16, 17 and rectangular hole 19 is discharged, so the residue in the small filter 13 becomes relatively large. Easy to clean by attaching and detaching the small filter.

When there is a lot of tableware residue, the small holes 10 of the large filter 9 and the inner surfaces of the small filter 13 are covered with the residue, making it impossible to obtain cleaning water equal to the amount of water sucked in by the pump 3. It tries to work, but the small filter 13 is inserted into the partition wall 23 so that it is housed, and the notch 2
4 faces the small hole 18 of the small filter 13 and is located away from the air trap 27, so that almost no negative pressure is applied to the air trap 27.

As is clear from the above embodiments, according to the present invention, during cleaning, the cleaning water circulates through the small holes of the large filter and the small filter, and when draining, it is drained through the holes larger than the small holes of the small filter. and good rinsing performance, and
Even if the small holes in the large filter are covered with residue, the small holes in the small filter are small, so negative pressure is unlikely to be applied to the air trap, and operation based on stable water level control can be achieved. Furthermore, the above-mentioned effects can be obtained by using one water receptacle, and the structure is compact and easy to assemble.

[Brief explanation of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a dishwasher according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of its main parts.
Fig. 3 is a sectional view taken in a direction perpendicular to the cross-sectional direction of Fig. 2, Fig. 4 is an external perspective view of the handle, and Fig. 5 is an external perspective view showing the relationship between the small filter and the water tray. . 1...Cleaning tank, 9...Large filter, 10...
Small hole, 13... Small filter, 16, 17... Rectangular hole, 18... Small hole, 19... Rectangular hole, 20
... Water receiver, 23 ... Partition wall, 24 ... Notch, 25 ...
...Discharge port, 27...Air trap, 28...Connection port, 29...Drain port.

Claims (1)

[Claims] 1 A large filter with a small hole at the bottom of the cleaning tank and a small filter installed inside the large filter are provided, and a water receiver is provided at the bottom of the large and small filters, and this water receiver has a discharge port that communicates with the washing pump. A partition wall having a notch is formed adjacent to the partition wall, and a connection port communicating with an air trap for water level control and a drain port communicating with a drainage pump are provided in the partition wall, and the small filter is inserted into the partition wall, and the small filter is inserted into the partition wall. A dishwasher, wherein a small hole is formed in the filter corresponding to the notch in the partition wall, and a hole larger than the small hole is formed in the side wall and bottom surface that do not correspond to the notch.