KR100399329B1 - Dishwasher - Google Patents

Abstract

The present invention relates to a dishwasher having a self-cleaning function for the filter assembly for filtering the wash water, the case; A washing tank mounted in the case so as to be pulled out; An injection arm installed in the washing tank; An integrated water supply pump including an upper vane for pressurizing and supplying the washing water to the injection arm, a lower vane for draining the washing water, and a driving motor for rotating the upper and lower vanes; A filter assembly composed of first and second filters; And a secondary discharge pipe connecting the foreign matter cleaning nozzle, the upper vane side of the water supply pump and the foreign matter cleaning nozzle so that the foreign matter adhered to the inner surface of the primary filter may be sprayed by spraying the washing water pressurized by the water supply pump during the drainage operation. And a filter washing means which is mounted on one side of the suction port of the auxiliary discharge pipe and rotated by a flow of water formed according to the rotational direction of the driving motor, the filter washing means including a blocking film to open and close the suction port.

According to the dishwasher according to the present invention as described above, during the drainage operation, the washing water is sprayed through the foreign matter washing nozzle to drop the foreign matter adhering to the primary filter so that the foreign matter is discharged together with the washing water, and the remaining washing water is supplied again. There is an advantage such that it is possible to prevent weighted contamination by the foreign matter.

Description

Dishwasher {Dishwasher}

The present invention relates to a dishwasher, and more particularly, to a dishwasher having a self-cleaning function for the filter assembly for filtering the wash water.

In general, the dishwasher is a device for automatically washing the dishes by spraying the washing water mixed with detergent, the case 10, as shown in Figure 1, the washing tank 12 is removably mounted in the case, the washing tank 12 Water supply pump for draining the washing water while supplying pressure to the washing water to the rack (20) mounted to the rack (20), the spray arm (30) also installed in the washing tank 12, and the spray arm (30) 40, and filtration means for filtration of the wash water.

Here, the injection arm 30 is supported by the arm holder so as to be horizontally rotated, and has a structure provided on the upper surface so that a plurality of injection nozzles 301 toward the rack (20).

The water supply pump 40 is a so-called washing / draining integral type in which the circulation and discharge operation of the washing water is determined by the rotational direction. As shown in FIG. 2, the driving motor 42 and the upper and lower vanes 44 connected to the same axis ( 46), the upper vane 44 is connected to the washing flow path for the circulation of the wash water, and the lower vane 46 is connected to the drainage flow path for the discharge of the wash water.

The filtration means is composed of a filter assembly 50 provided in the lower portion of the washing tank 12, and a fine filter 60 (see Fig. 1) provided in the bottom surface of the washing tank 12, the filter assembly 50 is It consists of a cylindrical primary filter (thin eye filter) 52 and a secondary filter (rough eye filter) 54 mounted in the primary filter 52 (see FIG. 4A).

According to the dishwasher according to the related art as described above, the washing water mixed with water and detergent is pressurized and supplied to the injection arm 30 through the washing flow path 402 by the water supply pump 40 and then through the injection nozzle 301. The washing action of the dishes is performed by spraying the dishes seated on the rack 20.

Referring to the operation of the water feed pump 40 in more detail, in the washing process as shown in Figure 3a, the upper vane 44 connected to the washing flow path rotates in a clockwise direction to wash water through the washing suction inlet 402 (in the drawing) The thick arrow is sucked) and the washing water is discharged to the injection arm 30 through the washing discharge port 401 again. At this time, the lower vane 46 applies suction to the drain discharge port 403 and discharges to the drain suction port 404 as shown in b of FIG. 3, so that the suction action of the washing water through the drain suction port 404 is not performed. do.

In addition, in the drainage process performed after the end of the washing process, as shown in c of FIG. 3, the rotational operation direction of the feed water pump 40 is reversed during the washing process, and suction force is applied to the drain inlet 404 by the lower vane. A toe output is applied to the drain discharge port 403, and the washing water is pressurized and drained through the drainage flow path, and the toe output by the upper vane 44 is applied to the washing suction port 402, thereby preventing the circulation of the wash water.

On the other hand, in the conventional dishwasher as described above, the washing water is filtered by the filtering means to prevent contamination weight due to the circulation use, the filtration action of the washing water and the main filter action by the filter assembly 50, the fine filter 60 ) By subfiltration.

The main filtration by the filter assembly 50 is the washing water sprayed from the spray arm 30 in the washing process, such as food waste mixed in the washing water while sequentially passing through the primary filter 52 as shown in Figure 4a The foreign material is filtered out.

In the drainage process after the end of the washing process, as shown in b of FIG. 4, the washing water is drained through the secondary filter 54. In this case, the foreign matter having large particles is caught by the secondary filter 54 so that the drainage flow path is caused by the foreign matter. It will not be blocked.

The secondary filtration action by the fine filter 60 is ejected from the bottom of the fine filter 60 through the branch flow path before the portion of the washing water discharged from the feed water pump 40 flows into the injection arm 30, so that the fine filter ( 60, finer foreign matter not filtered out of the filter assembly 50 is also filtered.

On the other hand, according to the prior art as described above, during the main filtration by the filter assembly 50, foreign matter introduced into the primary filter 52 is concentrated to the water supply pump 40 in accordance with the flow of the washing water, in some cases the 1 The tea filter 52 adheres to the wall surface.

Therefore, according to the foreign matter sticking phenomenon, the circulating efficiency of the washing water is reduced by partially blocking the washing flow path leading from the primary filter 52 to the feed water pump 40, and the foreign matter that should be discharged through the drainage flow path during the drainage operation is filtered. The problem arises that it remains in the assembly 50, increasing the degree of contamination of the replenished wash water.

The present invention has been made to solve the above-mentioned conventional problems, by increasing the circulation efficiency of the washing water by reducing and dispersing foreign matter adhering to the primary filter of the filter assembly in the drainage process of the dishwasher can reduce the degree of contamination of the washing water It is for the purpose of providing.

1 is a perspective view showing the overall structure of a general dish washer.

2 is a cross-sectional view showing the structure of a water supply pump applied to a conventional dishwasher.

Figure 3a, 3b, 3c is a state diagram showing the washing operation and drainage operation of the water supply pump applied to the conventional dishwasher.

Figure 4a, 4b is a state diagram showing the filtration operation by the filter assembly of the conventional dishwasher.

5 is a cross-sectional view showing the main structure of the dish washer according to the embodiment of the present invention.

6A and 6B are views illustrating a water supply pump structure and an operating state of the dishwasher according to the embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: case 12: washing bath

20: rack 30: injection arm

301: injection nozzle 40: water feed pump

401: cleaning discharge port 402: cleaning suction port

403: drain discharge port 404: drain suction port

42: drive motor 44: upper vane

46: lower vane 50: filter assembly

52: 1st filter 54: 2nd filter

60: fine filter 70: foreign matter cleaning nozzle

72: auxiliary discharge pipe 74: blocking film

The dishwasher provided to achieve the above object; A washing tank mounted in the case so as to be pulled out; An injection arm installed in the washing tank; An integrated water supply pump including an upper vane for pressurizing and supplying the washing water to the injection arm, a lower vane for draining the washing water, and a driving motor for rotating the upper and lower vanes, and a filter assembly composed of primary and secondary filters; And a secondary discharge pipe connecting the foreign matter cleaning nozzle, the upper vane side of the water supply pump, and the foreign matter cleaning nozzle so that the foreign matter adhered to the inner surface of the primary filter may be sprayed by spraying the washing water pressurized by the water supply pump during the drainage operation. And a filter cleaning means which is mounted on one side of the suction port of the auxiliary discharge pipe and rotated by a flow of water formed according to the rotational direction of the driving motor, and includes a filter membrane for opening and closing the suction port.

The foreign substance cleaning nozzle in the filter cleaning means is disposed to face inward from the outside of the primary filter so that foreign substances concentrated on the side close to the inlet can be easily filtered out, and the blocking membrane has a substantially triangular block-like structure at one vertex portion. Is characterized in that is fastened rotatably.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 5 and 6, and like reference numerals refer to like parts of the present invention.

Dishwasher according to an embodiment of the present invention includes a filter washing means for spraying the washing water pressurized by the feed water pump during the drainage operation as shown in Figure 5 to drop the foreign matter adhered to the inner surface of the primary filter 52 It is done by

The filter cleaning means may include a foreign substance cleaning nozzle 70, an auxiliary discharge pipe 72 connecting the upper vane 44 side of the feed water pump 40, and the foreign substance cleaning nozzle 70, and the auxiliary discharge pipe 72. It consists of a blocking film 74 mounted on one side of the inlet of (see Fig. 6a, 6b).

Here, the foreign matter cleaning nozzle 70 is disposed to face inward from the outside of the primary filter 52, which is close to the suction port when the foreign matter is filtered while the washing water passes through the primary filter 52 in the washing process. It is concentrated on the side and often caught in the primary filter 52, and the foreign matter caught in the primary filter 52 is easily detached as water sprayed from the foreign substance washing nozzle 70 during the drainage, which is discharged through the drainage flow path. In addition, the blocking film 74 is a substantially triangular block-like structure, the one side vertex of which is freely rotatable and is formed along the direction of rotation of the driving motor 42. By rotating by the opening and closing the suction port of the auxiliary discharge pipe (72).

Referring to the operation of the dishwasher according to the embodiment of the present invention configured as described above are as follows.

First, during the washing operation, the upper vane 44 rotates so that the blocking film 74 is rotated to one side about the vertex to which the blocking film 74 is rotated by the water flow formed in the pump 40 to block the inlet of the auxiliary discharge pipe 72. (See FIG. 6A)

Therefore, the washing water is not supplied to the foreign substance washing nozzle 70, but only to the injection arm 30 through the washing passage.

During the drainage operation, the rotational direction of the upper vane 44 is reversed to that of the washing operation, and thus, the water flow formed in the pump 40 is also reversed when the washing operation is performed. The suction port of the pipe 72 is opened (see FIG. 6B).

Then, the washing water introduced into the feed water pump 40 is pressurized by the upper vanes 44 and supplied to the foreign matter washing nozzle 70 through the auxiliary discharge pipe 72, and the washing water supplied from the foreign matter washing nozzle 70 is supplied. Sprayed to the primary filter 52 side is to drop the foreign matter adhering to the inside of the primary filter 52 (see Fig. 5).

The foreign matter separated from the primary filter 52 is smoothly drained together with the drained wash water so as not to weight the polluted water being re-supplied.

As described above, according to the dishwasher according to the present invention, when the drainage operation, the washing water is sprayed through the foreign substance washing nozzle to drop the foreign substance adhered to the primary filter so that the foreign substance is discharged together with the washing water, and the washing water is supplied again. It is possible to prevent weighted contamination by residual foreign matters. Also, unlike the filter cleaning by a dedicated nozzle made in the existing cleaning process, the filter cleaning is performed in the draining process, so that the dedicated nozzle is used during the cleaning. In addition, it is possible to prevent the pressure loss due to the flow rate distribution. In addition, since the suction amount can be reduced, the amount of one-time water required for pump operation can be reduced, thereby reducing the amount of water used.

Claims (3)

A case; A washing tank mounted in the case so as to be pulled out; An injection arm installed in the washing tank; An integrated water supply pump including an upper vane for pressurizing and supplying the washing water to the injection arm, a lower vane for draining the washing water, and a driving motor for rotating the upper and lower vanes; A filter assembly composed of first and second filters; And a secondary discharge pipe connecting the foreign matter cleaning nozzle, the upper vane side of the water supply pump, and the foreign matter cleaning nozzle so as to drop the foreign matter adhered to the inner surface of the primary filter by spraying the washing water pressurized by the water supply pump during the drainage operation. A filter washing means mounted to one side of the suction port of the auxiliary discharge pipe and formed by a blocking film to open and close the suction port by being rotated by a flow of water formed according to the rotational direction of the driving motor ; Dishwasher comprising a. The method of claim 1, The foreign substance cleaning nozzle is disposed in the dishwasher, characterized in that it is disposed inward from the outside of the primary filter so that foreign matter concentrated on the side close to the inlet can be easily filtered. The method of claim 1, The blocking film has a substantially triangular block-like structure, the one side vertex of the dishwasher, characterized in that freely fastening.