KR20070105048A - Dish washer - Google Patents

Abstract

A dishwasher is provided to preclude generation of siphon phenomenon inside a drain hose after completion of a drain operation by installing a siphon preventing device. A dishwasher comprises a sump(30), a drain pump, a drain hose(65), and a siphon preventing device(60). The sump stores washing water. The drain pump forcibly drains sewage in the sump. The drain hose is connected to the drain pump. The siphon preventing device is interposed at one portion of the drain hose to prevent generation of siphon phenomenon inside the drain hose.

Description

Dishwasher {Dish washer}

1 is a cross-sectional view of a dish washer equipped with a natural drainage preventing apparatus according to the present invention.

2 is an exploded view partially disassembled one side of the dishwasher according to the present invention.

Figure 3 is a state diagram showing the combination of the air brake, the sump and natural drainage prevention apparatus according to the present invention.

Figure 4 is a functional diagram showing a natural drainage prevention device when the drainage pump according to the invention operates.

Figure 5 is a functional diagram showing the natural drainage preventing device when the drainage pump according to the invention stopped.

            <Explanation of symbols for main parts of the drawings>

30: sump 40: air brake

60: natural drainage prevention device 61: inlet

62: outlet 63: backflow outlet

67: siphon hole 68: backflow hose

69: check valve 70: siphon chamber

71: auxiliary chamber 80: drain

The present invention relates to a dishwasher, and more particularly, to a dishwasher that prevents natural drainage when the dishwasher performs a draining process.

In general, the dishwasher is a home appliance for cleaning the food residue on the surface of the dish by the high-pressure washing water sprayed from the spray nozzle.

In detail, the dishwasher includes a tub in which a washing tank is formed and a sump mounted on the bottom of the tub to store washing water. In addition, the washing water is moved to the spray nozzle by the pumping action of the washing pump mounted in the sump, and the washing water moved to the spray nozzle is sprayed at a high pressure through the spray hole formed at the end of the spray nozzle. In addition, the washing water sprayed at the high pressure hits the surface of the dishes accommodated in the tub, so that dirt, such as food waste, which is on the dishes, falls to the bottom of the tub. Through this process, the dishes accommodated in the tub are washed.

On the other hand, such a conventional dishwasher is completed when the dishwashing stroke is completed, the shift to the drain stroke through the drain hose connected to the sump and the air drain pipe connected to the sump and drain pipe installed in the inside of the dishwasher.

However, the water passing through the air brake and the drain hose during the draining process makes the drain hose inside the vacuum state. This vacuum state is maintained even after the draining process is finished, and if the end of the drain hose is lower than the water surface in the sump, there is a problem that the natural drainage phenomenon (Siphon) occurs, even though the draining process is finished, it continues to drain.

In addition, in order to prevent natural drainage, there is a problem that the end of the drain hose must be installed higher than the water surface in the sump. And when the end of the drain hose is installed high there is a problem that the drain is delayed.

Furthermore, in order to eliminate the drainage delay, the drainage pump needs to be excessively operated, so that excessive power is required for the dishwasher, thereby deteriorating the electrical energy efficiency.

Accordingly, an object of the present invention has been proposed to solve the above problems, an object of the present invention is to provide a dishwasher which prevents natural drainage phenomenon when the drainage stroke is completed.

The dishwasher according to the present invention for achieving the above object is a sump in which the washing water is stored; A drain pump for forcibly draining the sewage in the sump; A drain hose connected to the drain pump; A natural drainage prevention device is included at any one point of the drainage hose to prevent a natural drainage phenomenon inside the drainage hose.

By the dishwasher according to the present invention, there is an effect that the natural drainage occurring after the drainage stroke of the dishwasher is finished.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of the spirit of the present invention can be easily made by adding, changing, or deleting other elements. Can suggest.

1 is a cross-sectional view of a dish washer equipped with a natural drainage preventing apparatus according to the present invention, Figure 2 is an exploded view partially disassembled one side of the dish washer according to the present invention.

1 and 2, the dishwasher 1 to which the natural drainage preventing device according to the present invention is applied is accommodated in the case 10 and the case 10 forming the outer appearance of the dishwasher 1. And a tub 11 having a washing tank formed therein, a door 12 formed at the front of the tub 11 to open and close the washing tank, and a sump formed at the center of the bottom surface of the tub 11 to be washed with water. 40 is included.

In addition, it is connected to one side of the sump 40, the washing pump 18 for pumping the washing water stored in the sump 40 at a high pressure, coupled to the rear of the washing pump 18 and the washing pump 18 It includes a washing pump drive motor (19) for driving. In addition, the water guide 30 which is a path through which the washing water pumped by the washing pump 18 is included. In addition, a drain pump 20 is provided in the sump 20, and a drain pump driving motor 21 for driving the drain pump 20 is mounted at a rear side of the drain pump 20 so that the drain pump ( 20). In detail, as the drain pump 20 is driven, sewage in the sump 30 is discharged to the filth of the dishwasher 1.

In addition, the lower nozzle 17 is coupled to the upper surface of the sump 40 is formed on the bottom surface of the washing tank and is attached to the upper portion of the water guide 30, the lower nozzle 17 for spraying the washing water upwards, the water guide ( 30 is formed extending in the vertical direction from the top nozzle 16 located in the center of the washing tank, and formed on the ceiling of the tub 110, the top nozzle 15 for spraying the washing water vertically downward. By the lower nozzle 17, the upper nozzle 16 and the top nozzle 15, the washing water is sprayed evenly from the top / down to the dishes accommodated in the washing tank to clean the dishes.

In detail, an upper rack 13 mounted on an upper side of the upper nozzle 16 for washing the dishes so that the dishes are located close to the upper nozzle 16, and the dishes are located close to the lower nozzle 17 A lower rack 14 is mounted on the upper side of the lower nozzle 17 to allow dishes to be washed. The upper rack 13 and the lower rack 14 is a basket shape to allow the washing water to pass through a plurality of dishes are accommodated therein. In detail, washing water sprayed from the upper nozzle 16, the lower nozzle 17 and the top nozzle 15 passes between the upper rack 13 and the lower rack 14, and the dishes are washed. In more detail, a guide rail (not shown) formed on both sides of the upper rack 13 and the lower rack 14 is formed on an inner side surface of the tub 11 (not shown). Guided to, and translating forward and backward of the tub (11).

In addition, the air brake 40 formed on one side of the tub 11, the plotter 43 and the natural drainage preventing device 60 is provided. The air brake 40, the plotter 43 and the natural drainage preventing device 60 will be described in detail later.

Hereinafter, the operation of the dish washing machine 1 will be described.

First, the user pulls open the door 12 of the dishwasher 1 and pulls some or all of the upper rack 13 and the lower rack 14 toward the front of the washing tank. In addition, the upper rack 13 and the lower rack 14 to accommodate the dishes or cutlery. Next, the upper rack 13 and the lower rack 14 are pushed back, and then the door 12 is pushed to close. Subsequently, power is applied to the dishwasher 1 to operate the dishwasher 1.

The dishwasher 1 performs a washing step when the power is applied and operated. At this time, the wash water flows into the sump (40). When the inflow of the washing water is finished, power is applied to the washing pump driving motor 19 to be driven. The washing pump 18 is driven by the driving of the washing pump driving motor 19 so that the impeller provided therein rotates. Thus, the washing water inside the sump 40 is moved to the water guide 30 and to the lower nozzle 17, the upper nozzle 16, and the top nozzle 15.

In addition, the washing water moved to the lower nozzle 17, the upper nozzle 16, and the top nozzle 15 is sprayed into the dishes stored in the upper and lower racks 13 and 14, and the dishes are washed. You will go through the process.

Here, the top nozzle 15 sprays the washing water vertically downward, and the upper nozzle 16 sprays the washing water vertically upward, so that the dishes accommodated in the upper rack 13 are uniformly washed.

In addition, the lower nozzle 17 sprays the washing water vertically upward, so that the dishes accommodated in the lower rack 17 are washed. In addition, a spray hole is formed on the bottom surface of the upper nozzle 16, and the washing water is sprayed from the lower rack 14 above. Therefore, the dishes accommodated in the lower rack 14 are to be uniformly washed.

Subsequently, when the washing step is completed, the washing water containing the foreign matter that has been removed from the dishes during the washing process is collected in the sump 40, and the foreign matter is filtered by the dirt collection filter provided in the sump 40. do. The foreign matter thus filtered is taken out of the dishwasher 1 by the user. In addition, the washing water filtered by the foreign matter is pumped by the drain pump 20 driven by the drain pump driving motor 21 to be discharged to the outside of the dishwasher 1. And when the operation of the drain pump 20 is stopped, the draining process is terminated.

On the other hand, when the operation of the drain pump 20 is stopped, the siphon phenomenon which is a natural drainage phenomenon occurs. At this time, the natural drainage is prevented by the natural drainage preventing device (60).

Then, the clean washing water is resupplied into the sump 40 of the dishwasher 1 again. Then, the washing process as described above is subjected to a rinsing step once again.

Finally, when the rinsing step is completed, the drying step is completely discharged by the exhaust fan formed on the inner surface of the door 12, the steam of the washing tank formed in the tub 11 is completely discharged Is done.

Figure 3 is a state diagram showing the combination of the air brake, the sump and natural drainage preventing apparatus according to the present invention.

Referring to Figure 3, the air brake 40 according to the present invention is installed on the outer wall surface of the tub 11 of the dishwasher 1, by the backflow hose 68 and the natural drainage prevention device 60 Is connected, it is connected to the sump (30) by the sump hose (49) and connected to the plotter (50) by the plotter feed pipe (51).

In detail, a water supply port 53 is formed below the air brake 40 to be connected to one end of the water supply hose 51. And the other end of the water supply hose 51 is provided with a water supply valve 52 to control the water supply of the dishwasher (1). In addition, the water supply passage 46 extends above the water supply port 53. And a flow meter 47 is formed on the water supply passage 46 to measure the flow rate of the washing water supplied.

On the other hand, the washing water flows down to the sump 30 through the lower water supply passage 56 extending downward from the upper end of the water supply passage 46. And a portion of the wash water flows into the tub communication hole 44 formed in the center of the air brake 40 through the upper water supply passage 55 extending from the upper end of the water supply passage 46 to the side, and part of the It flows into the plotter 50 connected with the plotter water supply pipe 51. In addition, the washing water flowing into the plotter 50 flows into the sump 30 through the sump hose 57 connected to the lower portion of the plotter 50.

In addition, the natural drainage apparatus 60 is formed above the air brake 40.

In detail, the natural drainage preventing device 60 includes a case 65 forming a body, and a partition wall 66 partitioning the siphon chamber 70 and the auxiliary chamber 71 formed inside the case 65. And an inlet 61 and an outlet 62 formed at a lower portion of the siphon chamber 70, a backflow outlet 63 formed at an upper portion of the auxiliary chamber 71, and the partition wall 66. It includes a check valve 69 for opening and closing the siphon hole 67 is formed.

In more detail, the inlet 61 is connected to the inlet hose 64 connected to the drain port of the drain pump 20 formed at one side of the sump 30. In addition, the outlet 62 is connected to a drain hose 65 having one end exposed to the outside of the dishwasher 1. Here, the drain 80 of the drain hose 65 may be installed below the sump 30 by the action of the natural drainage preventing device (60).

In addition, the backflow outlet 63 formed above the auxiliary chamber 71 is connected to the backflow hose 68 which is partially connected to the pores 45 of the air brake 40. In detail, the backflow hose 68 at the portion where the backflow hose 68 and the breathing life 45 are connected allows a portion of the backflow hose 68 to be selectively exposed to air so that air flows into the natural drainage preventing device 60. .

In addition, the partition wall 66 partitions the auxiliary chamber 71 and the siphon chamber 70. In addition, a siphon hole 67 is formed at one side of the circumferential wall 66 to allow the auxiliary chamber 70 to communicate with the siphon chamber 71. The cock 69a of the check valve 69 for opening and closing the siphon prevention hole 67 is inserted into or detachable from the siphon prevention hole 67.

In detail, the check valve 69 is formed on the flexible panel 69a formed larger than the area of the siphon prevention hole 67 and the upper surface of the panel 69a and is formed in the siphon prevention hole 67. Coke 69b is formed that has a corresponding shape and size. In addition, an opening and closing support 72 is formed at one side of the panel 69a and is fitted into and coupled to a support hole 72a formed at one side of the partition wall 66. The check valve 69 rotates up and down by the opening and closing support 72 to open and close the siphon prevention hole 67.

In more detail, when the sewage is filled in the siphon chamber 70 by the water pressure of the drain pump 20, the panel 69a is raised by the water pressure. Accordingly, the coke 69b formed on the upper surface of the panel 69a is also raised to close the siphon hole 67. At this time, the sewage that is partially leaked into the siphon hole 67 is introduced into the air brake 40 through the backflow hose 68. On the contrary, when the water pressure is lowered, the water pressure drops. In other words, when the operation of the drain pump 20 is stopped, the water pressure in the siphon chamber 70 is lowered so that the panel 69a is lowered due to its own weight and sewage filled in the auxiliary chamber 71. . Thus, the siphon hole 68 is open. At the same time, air introduced through the backflow hose 68 is introduced into the siphon chamber 70 through the auxiliary chamber 71 and the siphon hole 68. Therefore, the siphon chamber 70 is broken in a vacuum state to prevent the siphon phenomenon, which is a natural drainage phenomenon.

Hereinafter, the operation of the natural drainage preventing apparatus according to the present invention will be described with reference to the drawings.

Figure 4 is a functional diagram showing a natural drainage preventing device when the drain pump is operated according to the present invention, Figure 5 is a functional diagram showing a natural drainage preventing device when the drainage pump according to the present invention.

4 and 5, first, when the dish washing stroke of the dish washing machine 1 is finished, the drain pump driving motor 21 is operated to drive the drain pump 20 to perform a drain stroke. do. The sewage stored in the sump 30 is introduced into the siphon chamber 70 of the natural drainage preventing device 60 through the inlet hose 64. The sewage flowing into the siphon chamber 70 increases the water pressure inside the siphon chamber 70, and raises the panel 60a upward. At this time, some of the leaked water through the siphon prevention hole 67 is introduced into the air brake 40 through the backflow hose (68).

On the other hand, when the operation of the drain pump 20 is stopped and the drain stroke is completed, the water pressure of the siphon chamber 70 is lowered. By doing so, the panel 60a is lowered downward. Air is introduced into the auxiliary chamber 71 and the siphon chamber 70 through the backflow hose 68. The air introduced in this way breaks the vacuum inside the siphon chamber 70 to prevent the siphon phenomenon. Therefore, the residual water of the siphon chamber 70 flows down the outlet 62 by its own weight, and further inflow of sewage is blocked into the inlet 61, thereby preventing natural drainage.

By the dishwasher according to the present invention as described above, there is an effect that the natural drainage phenomenon occurring after the drainage stroke of the dishwasher is finished.

In addition, by the dishwasher according to the present invention, it is possible to install the drain of the drain hose of the dishwasher lower than the lower end of the dishwasher to eliminate the restrictions on installation.

Claims (9)

Sump in which washing water is stored; A drain pump for forcibly draining the sewage in the sump; A drain hose connected to the drain pump; And a natural drainage preventing device interposed at any one point of the drainage hose to prevent a natural drainage phenomenon inside the drainage hose. The method of claim 1, One side of the natural drainage preventing device further comprises a through hole through which a portion of the washing water is introduced or drained back to the air flow back. The method of claim 1, The air brake further includes a flow meter for detecting the flow rate of the washing water flowing into the sump, The natural drainage preventing device is a dishwasher, characterized in that connected to the air brake by a backflow hose. The method of claim 1, The natural drainage preventing device is formed on at least one side of the inner or outer circumference siphon hole for introducing the outside air, The siphon hole is selectively opened and closed by a check valve, it characterized in that the natural drainage is prevented when the drainage stops. Tub; A sump connected to the tub to store washing water; A drain pump for forcibly discharging the washing water in the sump; And a natural drainage preventing device mounted on a side of the tub and including a check valve for preventing a natural drainage phenomenon generated after the drainage process of the wash water by the operation of the drainage pump is stopped. The method of claim 5, The natural drainage preventing device and the case, A partition wall dividing the inside of the case and having a siphon hole at one side; And a drain hose connected to the case, wherein the check valve is rotatably mounted to the partition wall so that the siphon hole is selectively opened and closed. The method of claim 6, The siphon hole is closed when drained by the check valve, otherwise it is opened dishwasher. The method of claim 6, The siphon hole is opened by the weight of the check valve of the dishwasher. The method of claim 5, The apparatus for preventing natural drainage is divided into a siphon chamber and an auxiliary chamber, and the washing water introduced into the auxiliary chamber is introduced into an air brake having a flow meter for detecting a flow rate of the washing water.

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