KR100808160B1 - drain device of cleansing machine - Google Patents

Abstract

The present invention relates to a dishwasher, and more particularly, to a washing water drainage device that reduces the amount of washing water remaining in the drain hose when draining the washing water and prevents backflow of the washing water and sewage.

To this end, the present invention is provided with a sump (sump) is installed in the lower end of the washing tank for receiving tableware for receiving the supplied water; A drain pump installed at the lower end of the sump to forcibly drain the washing water; In the dishwasher, which is connected to the washing water discharge side of the drain pump, and has a "∩" shape such that the bent portion is located above the gravity direction, the dishwasher includes: It provides a washing water drainage device of the dishwasher, characterized in that the backflow preventing member 51 is installed to open the flow path when discharged and close the flow path when the wash water flows back.

Dishwasher, Drainage

Description

Drainage device of dishwasher {drain device of cleansing machine}

1 is a schematic view showing a conventional washing water drainage device.

Figure 2 is an operating state diagram showing the flow direction of the washing water when the drain pump of Figure 1 operates.

Figure 3 is an operating state diagram showing the flow direction of the washing water at the time of the drain pump of FIG.

Figure 4 is a state diagram showing a state in which the washing water remains in the drain of Figure 1;

Figure 5 is a schematic diagram showing the drainage for preventing the wash water backflow of the dishwasher of the present invention.

6 is an operating state diagram showing the flow direction of the washing water when the drain pump of FIG.

Figure 7 is a state diagram showing a state in which the washing water remaining in the drainage when the washing pump of FIG.

Explanation of symbols on the main parts of the drawings

1: washing tank 2: water feed pump

3: water supply hose 4: washing water inlet

11: sump 12: drain pump

50: natural drainage prevention pipe 51: backflow prevention member

52: expansion part 53: stopper

54: seal

The present invention relates to a dishwasher, and more particularly, to a washing water drainage device of the dishwasher to reduce the amount of wash water remaining in the drainage device and to prevent backwashing of the wash water.

A general dishwasher is a device for washing dishes by putting the dishes in a washing tank and then spraying the washing water mixed with detergent.

In such a dishwasher, a sump is installed at the lower end of the washing tank so as to recover the supplied water, and the washing pump is operated to spray the dish by spraying the washing water contained in the sump onto the dish. When the washing operation is completed, the washing water recovered in the sump is discharged to the outside through the drainage device.

Hereinafter, a drainage device of a conventional dishwasher will be described with reference to FIGS. 1 to 4.

1 is a schematic view showing a conventional washing water drainage device, the dishwasher is a washing tank (1) installed inside the main body, a water supply device for supplying the washing water to the washing tank (1), and in the washing tank (1) And a drainage system for draining the washing water after the washing of the dishes is completed.

The water supply device includes a water supply pump 2 installed to supply water to the washing tank 1, and a water supply hose 3 connecting the water supply pump 2 and the washing water inlet 4.                         

In addition, the drainage device is a sump (11) (sump) for receiving the washing water after the washing stroke is completed, and a drain pump (12) connected to the sump (11) to suck the washing water accumulated in the sump (11), and It comprises a drain flow path connected to the washing water discharge side of the drain pump (12).

The drain passage includes a natural drainage preventing pipe 50, the backflow prevention portion 14 and the drain hose (15).

A natural drainage preventing pipe 13 formed in a “∩” shape is installed at the washing water discharge side of the drainage pump 12, and the bent portion of the natural drainage preventing pipe 13 is installed to face the upper portion in the direction of gravity and also the sump The height H is positioned above the top height of 11.

The first flow path 13a is installed at the wash water discharge side of the drain pump 12, and the second flow path 13b is installed at the wash water inflow side of the backflow prevention part 14. That is, it has a fastening structure capable of inserting both ends of the natural drainage prevention pipe 13 into the first flow passage 13a and the second flow passage 13b.

The backflow prevention part 14 is installed on the wash water discharge side of the second flow path pipe 13b, and the check valve 14a is installed on the backflow prevention part 14, and on the wash water discharge side of the backflow prevention part 14. Drain hose 15 is connected.

The operation of the drainage device installed as described above will be described with reference to FIGS. 2 to 4 as follows.

Figure 2 is an operating state diagram showing the flow direction of the washing water when the drain pump of Figure 1, Figure 3 is an operating state diagram showing the flow direction of the washing water when the drain pump of Figure 1, Figure 4 is the washing water in the drain of Figure 1 Is a state diagram showing the remaining state.

First, when the dishwasher starts operation, the water supply valve opens and the washing water passes through the water supply hose 3 and then flows into the washing tank 1 through the water inlet, and the washing water introduced into the washing tank 1 is sump ( 11) are gathered. At this time, as the washing pump is operated, the washing water is sprayed through the injection arm (not shown) to wash the dishes placed on the shelf.

As the washing water of the sump 11 is injected into the dishes, when the washing of the dishes is completed, the drain pump 12 should be operated to discharge the washing water to the outside.

At this time, the drain pump 12 drains the washing water collected in the sump 11 along the arrow direction of FIG. 2 by forming a predetermined pressure. That is, the washing water discharged from the drain pump 12 is discharged to the outside while sequentially passing through the natural drain prevention pipe 13, the backflow prevention portion 14 and the drain hose 15.

In this way, when the wash water collect | recovered in the sump 11 is discharged | emitted, the said drain pump 12 is stopped. At this time, the washing water located in the natural drainage prevention pipe 13 flows to the lower part based on the bent portion by gravity as the pressure is released.

Subsequently, as shown in FIG. 4, the wash water located on the drain pump 12 side based on the bent portion flows to the drain pump 12 by gravity and accumulates on the sump 11. Then, the washing water located on the drain hose 15 side based on the bent portion flows to the drain hose 15 side. At this time, when the drain hose 15 is installed at a predetermined height, the water level of the natural drainage prevention pipe 13 and the drain hose 15 is the same.

Then, the check valve 14a is closed to prevent the inflow of sewage and washing water from the outside.

However, in the drainage device having the structure as described above, the washing water located at the drainage pump side portion based on the bent portion of the natural drainage pipe is introduced into the sump 11 again.

Therefore, since the amount of washing water remaining in the dishwasher is large, the dishwasher cannot be sanitarily used. In particular, when the dishwasher is used occasionally, the remaining washing water may decay, causing odors.

In addition, in order to install the backflow prevention part 14, the natural drainage prevention pipe 13 and the drain hose 15 should be separated and installed, and the natural drainage prevention pipe installed between the drainage pump 12 and the backflow prevention. In order to install (13), the first channel 13a and the second channel 13b must be manufactured and installed separately.

This increases the number of parts of the dishwasher and causes the product structure to be complicated.

In order to solve the above problems, it is an object of the present invention to reduce the amount of wash water remaining in the drain hose when draining the wash water, and to provide a drainage for preventing water backflow to prevent backflow of the wash water and sewage.

In order to achieve the above object, the present invention is provided with a sump (sump) is installed in the lower end of the washing tank for receiving tableware for receiving the supplied water; A drain pump installed at the lower end of the sump to forcibly drain the washing water; In the dishwasher comprising a natural drainage prevention pipe connected to the washing water discharge side of the drainage pump, the bent portion having a "∩" shape so that the bent portion is located in the upper direction of gravity direction, It provides a washing water drainage device of the dishwasher, characterized in that the backflow preventing member is installed to close the flow path when opening the washing water backflow.

The present invention relates to a wash water drainage device which prevents backwash water and sewage sewage from flowing back after the drainage pump is stopped by installing a backflow prevention member in a natural drainage prevention pipe installed on the wash water discharge side of the drainage pump.

Hereinafter, the present invention will be described with reference to FIGS. 5 to 7 with reference to the drainage device for preventing the water backflow as follows.

FIG. 5 is a schematic view showing a drainage preventing device for backwashing of the dishwasher of the present invention, the washing water drainage device of the dishwasher of the present invention includes a sump 11, a drainage pump 12, and a natural drainage preventing pipe 50. )

The sump 11 is installed at the lower end of the washing tank 1 for receiving dishes and accommodates the washing water supplied into the washing tank 1 by the water supply hose 3. The drain pump 12 is connected to the lower part of the sump 11 to forcibly drain the washing water. In addition, the natural drainage preventing pipe 50 is connected to the washing water discharge side of the drain pump 12, is formed in a "∩" shape as a whole is installed so that the bent portion is located in the upper direction of the gravity direction.

The natural drainage preventing pipe 50 is provided with a backflow preventing member 51. The backflow preventing member 51 opens the flow path by the discharge pressure of the washing water when the drainage pump 12 operates, and the drainage pump 12 ) Close the wash water flow path by self weight when stopped.                     

In this case, as the backflow preventing member 51, a sphere for preventing backflow is provided.

As described above, the embodiment in which the backflow preventing member 51 is installed in the natural drainage preventing tube 50 will be described in detail.

The expansion pipe part 52 is formed in the natural drainage preventing pipe 50, and a backflow prevention tool is installed in the expansion pipe part 52. At this time, the diameter of the backflow prevention sphere is preferably formed larger than the inner diameter of the natural drainage preventing pipe (50).

This is to allow the reverse flow prevention block to block the wash water flow path of the natural drainage prevention pipe (50).

In addition, a stopper 53 is formed in the expansion pipe 52 to prevent the backflow prevention tool from being caught by the stopper 53 when the washing water is discharged to close the washing water flow path. That is, when the drain pump 12 is operated, the reverse flow prevention sphere rises upward by the discharge pressure of the washing water. At this time, the reverse flow prevention sphere is caught by the stopper 53 so that it does not rise any more. Do not block the flow path.

In addition, by providing the seal 54 on the inner circumferential surface of the washing water inflow side of the expansion pipe 52, it is possible to prevent the occurrence of a gap between the backflow prevention tool and the contact inner surface of the expansion pipe 52 when the washing water flows back. In addition, it can also be understood that by making the backflow prevention tool made of a flexible material, it is possible to close the flow path of the expansion part 52 by the pressure flowing back of the washing water.

On the other hand, the backflow prevention member 51 is preferably installed on the inflow side of the wash water, that is, the wash water discharge side of the drain pump 12 when viewed based on the bent portion of the natural drainage prevention pipe (50).

This is to open the flow path of the expansion pipe 52 when the wash water flows into the natural drainage prevention pipe 50, and to close the flow path of the expansion pipe 52 when the wash water flows back.

Since the backwater can be prevented from flowing back by the natural drainage preventing pipe 50, there is no need to provide a separate check valve 14a as in the prior art.

Referring to Figures 6 and 7 with reference to the operation of the dishwasher provided with a backflow prevention drainage having such a structure as follows.

6 is an operational state diagram showing the flow direction of the washing water when the drainage pump of FIG. 5 is operated, and FIG. 7 is a state diagram showing the state of the washing water remaining in the drainage device when the washing pump of FIG. 5 is stopped.

When the drainage stroke for draining the washing water to the outside after the washing stroke of the washing machine is completed, the drainage pump 12 is operated to pump the washing water recovered in the sump 11 to the natural drainage preventing pipe 50.

The washing water introduced into the natural drainage preventing pipe 50 flows upward as shown by the arrow of FIG. 6 and then flows downward again.

Subsequently, the backflow prevention tool is moved upward by the discharge pressure of the washing water, and the washing water flow path of the expansion pipe 52 is opened by this movement. At this time, since the backflow prevention tool is stopped by the stopper 53 and no longer moves upward, the washing water flow path in the expansion pipe 52 remains open while the drainage pump 12 is operated.

The washing water passing through the expansion part 52 and the bent part is discharged to the outside through the drain hose 15.

Next, when almost all the washing water accumulated in the sump 11 is discharged, the drain pump 12 is stopped.

When the drain pump 12 is stopped, the pressure applied to the non-return valve is also released, so that the non-return valve is lowered by its own weight to close the washing water flow path as shown in FIG. 7. At this time, the backflow prevention block blocks the washing water flow path due to its own weight.

Therefore, the washing water located in the drainage pump 12 side portion of the natural drainage prevention pipe 50 can be prevented from flowing back to the sump 11. In addition, it is understood that the higher the height of the natural drainage preventing pipe 50, the greater the amount of backwashed water.

As described above, by reducing the amount of washing water flowing back into the sump 11 after the drainage stroke, the washing machine can be used hygienically.

In particular, when using the washing machine from time to time, it is possible to prevent the washing water flowed back to the sump 11 to odor smell and improve the reliability of the product of the small roaster. In addition, even after the dishes are washed in the washing machine, the dishes can be stored hygienically even when the dishes are stored in the washing machine.

On the other hand, in the present invention, since it is not necessary to install a separate check valve 14a, only the natural drainage preventing pipe 50 and the drain hose 15 or the natural drainage preventing pipe 50 can be manufactured integrally. Accordingly, the product structure can be simplified and is advantageous in terms of manufacturing cost.

As described above, the present invention is to reduce the amount of wash water remaining in the wash water to make the washing machine hygienic, as well as to improve the consumer's confidence in the product.

In addition, it is possible to reduce the manufacturing cost and improve the efficiency of the assembly process by having a structure capable of manufacturing the parts integrally.

Claims (8)

A sump that is installed at a lower end of the washing tank for receiving dishes and accommodates the water to be washed; A drain pump installed at the lower end of the sump to forcibly drain the washing water; In the dishwasher comprising: a natural drainage prevention pipe: connected to the washing water discharge side of the drainage pump, the bent portion having a "∩" shape so as to be located in the upper portion of the gravity direction, The natural drainage preventing pipe is a washing water drainage device of the dishwasher, characterized in that the backflow preventing member for opening the flow path when the washing water discharged and closing the flow path by the force including its own weight when the water flow back. The method of claim 1, The backflow preventing member is a washing water drainage device of the dishwasher, characterized in that the backflow (sphere). The method of claim 2, The expansion pipe portion is formed in the natural drainage prevention pipe, the washing water drainage device of the dishwasher, characterized in that the reverse flow prevention sphere is installed in the expansion pipe. The method of claim 3, wherein Washing water drainage device of the dishwasher, characterized in that the diameter of the backflow prevention sphere is formed larger than the inner diameter of the natural drainage prevention pipe. The method of claim 3, wherein The stopper is formed in the expansion portion, the washing water drainage device of the dishwasher, characterized in that when the discharge of the wash water is prevented by the back flow prevention catching the stopper to close the wash water flow path. The method of claim 3, wherein And a seal provided on the inner circumferential surface of the washing water inlet side of the expansion pipe to assist in closing the flow path by the backflow prevention tool when the washing water flows back. The method of claim 1, The backflow prevention member is a washing water drainage device of the dishwasher, characterized in that installed on the wash water inlet side on the basis of the bent portion of the natural drainage prevention pipe. The method of claim 1, Washing water drainage device of the dishwasher, characterized in that the natural drainage prevention pipe is formed integrally.

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