KR100315945B1 - Dish washer to inject or discharge water in sump case using one pump - Google Patents

Abstract

PURPOSE: One pump of a dish washer is used to inject or discharge water in a sump case to simplify structure and reduce volume and manufacturing cost. CONSTITUTION: In a dish washer having a washing tub(44) and an injection nozzle to inject water into the washing tub, a sump case(50) receives water in the washing tub injected from the nozzle. A supply pipe supplies water in the sump case to the injection nozzle. A discharge pipe(58) discharges water in the sump case to outside. A pumping device pumps water in the sump case to the supply pipe and the discharge pipe selectively.

Description

Dishwasher for dispensing and discharging water in the sump case using a single pump

The present invention relates to a dishwasher, and more particularly, to a dishwasher capable of performing both the injection of water for dishwashing and the discharge of water after completion of dishwashing using a single motor.

The dishwasher is a device for automatically washing dishes by spraying the washing water onto the dishes using a pump. An example of such a dishwasher is shown in FIGS. 1 and 2.

1 is a perspective view of a conventional general dish washer, and FIG. 2 is a view schematically showing FIG. 1 for convenience of description.

The dishwasher has an outer casing 3 forming an outer appearance, a washing tank 4 provided in the outer casing 3, and a driving device 11 provided below the washing tank 4.

In the washing tank 4, a pair of dish baskets 12 and 13 are provided. The dishes to be washed are accommodated in the dish baskets 12 and 13.

The driving device 11 is installed in a sump case 10 for receiving water, a supply pump 15 connected to the sump case 10, a drain pump 17, and a lower portion of the dish baskets 12 and 13, respectively. A pair of injection nozzles 38 and 39, a pair of supply pipes 24 and 25 for supplying the water pumped by the supply pump 15 to the respective injection nozzles 38 and 39, the drain pump 17 A discharge pipe 18 for discharging the water pumped by the outside to the outside, and a water supply valve 21 for supplying water to the sump case (10).

As shown in FIG. 3, the feed pump 15 includes a pump housing 31, a fan 32 installed in the pump housing 31, and a motor (not shown) for driving the fan 32. Consists of The pump housing 31 and the sump case 10 are interconnected by a suction pipe (not shown). When the supply pump 15 is operated, water in the sump case 10 is sucked into the pump housing 31 through the suction pipe, and the sucked water is supplied into the supply pipes 24 and 25. The drain pump 17 has a configuration similar to that of the supply pump 15.

After the dishes to be washed are stored in the dish baskets 12 and 13, the user presses a start button (not shown). Then, the water supply valve 21 is opened by a microprocessor (not shown) to supply water to the sump case 10 from the outside. When a certain amount of water is supplied into the sump case 10, the microprocessor closes the water supply valve 21 to stop water supply.

The microprocessor operates the feed pump 15, whereby the water in the sump case 10 is supplied to the injection nozzles 38, 39 through the supply pipes 24, 25. The spray nozzles 38 and 39 spray water toward the dishes stored in the dish baskets 12 and 13, and thus the dishes are washed.

Water in the washing tank 4 having washed the dishes is recovered to the sump case 10 installed at the lower portion of the washing tank 4. While the operation of the supply pump 15 is continued, the water in the sump case 10 is circulated according to the above-described process and the washing operation is performed.

When the washing of the dishes is completed, the operation of the supply pump 15 is stopped, the operation of the drain pump 17 is started. Accordingly, the water in the sump case 10 is discharged to the outside through the discharge pipe (18).

However, the conventional dishwasher includes two pumps 15 and 17 for spraying water in the sump case 10 into the washing tank 4 and discharging the water in the sump case 10 to the outside after the washing is completed. That is, the supply pump 15 and the drain pump 17 are provided. Therefore, the structure of the dishwasher is complicated and the volume is unnecessarily large, there is a problem that the manufacturing cost increases.

In addition, in the case of employing small pumps having a small pumping capacity in order to reduce the volume of the dishwasher, it is difficult to obtain sufficient injection force necessary for washing the dish and the drainage time after the completion of the washing becomes long.

Accordingly, it is an object of the present invention, in view of these problems in the prior art, to perform both the spraying operation of the washing water for dishwashing and the draining operation of the washing water after the washing is completed by using a single pump, thereby reducing the number of parts. This is to provide a dishwasher that can reduce manufacturing costs and reduce volume.

1 is a perspective view of a conventional general dishwasher,

FIG. 2 is a schematic side cross-sectional view of FIG. 1;

3 is an enlarged cross-sectional view of the supply pump of FIG.

4 is a schematic perspective view of a dishwasher according to the present invention;

5 is an enlarged cross-sectional view of the first embodiment of the pump shown in FIG. 4;

6 and 7 are plan cross-sectional views of FIG.

<Explanation of symbols for main parts of the drawings>

43: outer casing 44: washing tank

50: sump case 51: drive device

52, 53: dish basket 55: pump

58: discharge pipe 60: suction pipe

64: lower supply pipe 65: upper supply pipe

66: main supply pipe 71: blocking member

73: blocking portion 75: acting portion

77: guide groove 81: fan

82: forward and reverse drive motor 87, 87a: guide member

95: pump housing

The object is, according to the present invention, a washing tank containing the injection nozzle, a sump case for receiving the water to be supplied to the injection nozzle and the water injected into the cleaning tank, and supplying the water in the sump case to the injection nozzle In the dishwasher having a supply pipe for discharging, the discharge pipe for discharging the water in the sump case to the outside, and a pump device for pumping the water in the sump case to the supply pipe and the discharge pipe, the pumping device, the pump case A pump housing having a suction port connected to the supply pipe, a supply port connected to the supply pipe, a discharge port connected to the discharge pipe, and a guide groove formed adjacent to the supply port and the discharge port; A pump having a forward and reverse drive motor accommodated in the pump housing, and a fan for forward and reverse rotation by the forward and reverse drive motor to discharge water sucked through the suction port to the supply port and the discharge port; A blocking member for slidingly moving along the guide groove by water flow in the pump housing according to the rotational direction of the fan to selectively block the supply port or the discharge port; It is achieved by a dishwasher comprising a guide member for guiding the water flow formed in the pump housing to the blocking member.

Here, the blocking member preferably has a plate-shaped blocking portion slidably installed along the guide groove, and an action portion protruding into the pump housing from the blocking portion.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments of the present invention.

The dishwasher according to the present invention, as shown in Figure 4, is provided in the outer casing 43, the washing tank 44 installed in the outer casing 43, and the lower portion of the washing tank 44 to form the appearance It has a drive device 51.

In the washing tank 4, a pair of dish baskets 52 and 53 are provided. The dishes to be washed are accommodated in the dish baskets 52 and 53.

The driving device 51 is a pair of injection nozzles respectively installed at the lower part of the sump case 50 for receiving water, the pumping device 55 connected to the sump case 50, and the dish baskets 52 and 53. (78, 79), the lower supply pipe 64 and the upper supply pipe 65 connecting the pumping device 55 and the injection nozzles (78, 79), respectively, and the water pumped by the pumping device 55 to discharge to the outside And a discharge pipe 58 for the purpose.

The pumping device 55 has a pump housing 95 and a pump 54 housed in the pump housing 95, as shown in FIGS. 5 to 7. The pump 54 is composed of a fan 81 and a forward and reverse drive motor 82 for driving the fan 81.

The forward and reverse drive motor 82 is a motor capable of bidirectional rotation, and thus the fan 81 can be rotated in both directions by the forward and reverse drive motor 82.

The pump housing 95 is formed with an inlet port 60a, a supply port 66a, and an outlet port 58a, which are connected to the suction pipe 60, the main supply pipe 66, and the discharge pipe 58, respectively. .

The suction pipe 60 connects the sump case 50 and the pump housing 95. In operation of the pump 54, the water in the sump case 50 is sucked into the pump housing 95 through the suction pipe 60. In addition, the main supply pipe 66 is connected to both the upper and lower supply pipes (64, 65). In operation of the pump 54, the water in the pump housing 95 is supplied to the upper and lower supply pipes 64, 65 through the main supply pipe 66, respectively.

The supply port 66a of the main supply pipe 66 and the discharge port 58a of the discharge pipe 58 are positioned to be adjacent to each other in the pump housing 95. A blocking member 71 is provided at the supply port 66a and the discharge port 58a. The blocking member 71 has a plate-shaped blocking portion 73 and an acting portion 75 formed at the central portion of the blocking portion 73.

Guide grooves 77 are formed in the regions adjacent to the supply port 66a and the discharge port 58a, and the blocking portion 73 is coupled to the guide groove 77. The blocking portion 73 is slidable along the guide groove 77, and selectively selects the supply port 66a and the outlet port 58a as shown in FIGS. 6 and 7 according to the position in the guide groove 77. Will be closed.

The acting portion 75 protrudes from the blocking portion 73 to the inside of the pump housing 95. The acting portion 75 functions to move the blocking portion 73 in accordance with the rotation direction of the forward and reverse drive motor 82. That is, when the fan 81 is rotated in the clockwise direction by the forward and reverse drive motor 82, as shown by the arrow in Figure 6, the acting portion 75 is subjected to the downward force by the water flow in the clockwise direction, Accordingly, the blocking portion 73 moves downward along the guide groove 77. Thus, the main supply pipe 66 is opened and the discharge pipe 58 is closed. On the other hand, as shown by the arrow in Figure 7, when the fan 81 is rotated counterclockwise by the forward and reverse drive motor 82, the acting portion 75 is subjected to upward force by the water flow in the counterclockwise direction As a result, the blocking unit 73 moves upward along the guide groove 77. Thus, the main supply pipe 66 is closed and the discharge pipe 58 is open.

A guide member 87 is installed between the blocking member 71 and the fan 81. The guide member 87 includes a pump housing so that water flows toward the action portion 75 when the fan 81 rotates. 95) to guide the flow of water in the water.

Hereinafter will be described the operation of the dishwasher according to the present invention having the configuration as described above.

After the dishes to be washed are stored in the dish baskets 52 and 53, the user presses a start button (not shown). Then, a water supply valve (not shown) is opened by a microprocessor (not shown) to supply water to the sump case 50 from the outside. When a certain amount of water is supplied into the sump case 50, the microprocessor closes the water supply valve to stop water supply.

The microprocessor drives the forward and reverse motor 82 so that the fan 81 rotates clockwise, thereby opening the main supply pipe 66 and closing the discharge pipe 58 as shown in FIG. Accordingly, the water in the sump casing 50 is sucked into the pump housing 95 through the suction pipe 60, and the sucked water is supplied to the upper and lower supply pipes 65 and 64 through the main supply pipe 66. This water is sprayed toward the dishes contained in the dish baskets 52 and 53 by the spray nozzles 78 and 79, whereby the dishes are washed.

Water in the washing tank 44 in which the dishes are washed flows into the sump case 50 installed under the washing tank 44. While the operation of the pump 54 is continued, the water in the sump case 50 is circulated according to the above-described procedure, and the washing operation is performed.

When the washing of the dishes is completed, the microprocessor drives the forward and reverse drive motor 82 so that the fan 81 rotates counterclockwise, whereby the main supply pipe 66 is closed and the discharge pipe 58 as shown in FIG. ) Is opened. Accordingly, the water in the sump case 50 is sucked into the pump housing 95 through the suction pipe 60, and the sucked water is discharged to the outside through the discharge pipe 58.

As described above, according to the present invention, the washing water is also supplied to one pump 54 by the forward and backward driving motor 82 which is rotatable in both directions and the blocking member 71 which is driven in the direction of the flow of water in the pump housing 95. And both can be discharged. Therefore, the number of parts can be reduced and the size of the dishwasher can be reduced.

As described above, according to the present invention, since a single pump can be used to perform both the spray operation of the washing water for washing the dish and the drainage operation of the washing water after the washing is completed, the number of parts is reduced and the production cost is reduced. The volume of the washer will be reduced.

Claims (2)

A washing tank containing a spray nozzle, a sump case accommodating water to be supplied to the spray nozzle and water sprayed into the washing tank, a supply pipe for supplying water in the sump case to the spray nozzle, and a sump case in the sump case. In the dishwasher having a discharge pipe for discharging water to the outside, and a pump device for pumping the water in the sump case to the supply pipe and the discharge pipe, The pumping device, A pump housing having a suction port connected to the sump case, a supply port connected to the supply pipe, a discharge port connected to the discharge pipe, and a guide groove formed adjacent to the supply port and the discharge port; A pump having a forward and reverse drive motor accommodated in the pump housing, and a fan for forward and reverse rotation by the forward and reverse drive motor to discharge water sucked through the suction port to the supply port and the discharge port; A blocking member for slidingly moving along the guide groove by water flow in the pump housing according to the rotational direction of the fan to selectively block the supply port or the discharge port; Dishwasher comprising a guide member for guiding the water flow formed in the pump housing to the blocking member, The method of claim 1, And the blocking member has a plate-shaped blocking part slidably installed along the guide groove and an action part protruding from the blocking part into the pump housing.