KR101308375B1 - A tableware washing machine - Google Patents

Abstract

The present invention relates to a dishwasher, and when washing the water introduced into the sump by using an impeller to improve the cleaning performance by preventing air from flowing into the wash water, a dishwasher capable of sufficient washing even with a relatively small amount of washing water The purpose is to provide.

In order to achieve this object, the sump housing constituting the appearance of the sump; An impeller installed on an upper surface of the sump housing and pumping the washing water; An impeller casing in which the impeller is placed; A communication hole provided in the impeller casing and guiding the introduction of the washing water by the impeller; The dishwasher is provided around the communication hole and includes an air inflow prevention rib to prevent the inflow of air when the washing water is pumped.

Description

Dishwasher {A tableware washing machine}

1 is a side cross-sectional view of the dishwasher according to the present invention.

Figure 2 is a perspective view showing the inside of the main body of the dishwasher according to the present invention.

3 is an exploded perspective view of a sump according to the present invention.

4 is a perspective view of an air inflow prevention rib according to the present invention. .

Fig. 5 is a side sectional view when there is no air inflow preventing rib according to the present invention.

Figure 6 is a side sectional view when there is an air inflow prevention rib according to the present invention.

Description of the Related Art [0002]

13: sump 16: sump housing

21: impeller 22: first air inflow prevention rib

23: 2nd air inflow prevention rib 23a: air discharge hole

24: impeller casing 24c: main euro

24d: sub euro 25e: dirt chamber

The present invention relates to a dishwasher, which improves the washing performance by minimizing the inflow of air into the washing water when the washing water introduced into the sump is pumped using an impeller, and the dishwasher capable of sufficient washing with a relatively small amount of washing water. The purpose is to provide.

The dishwasher is a device for automatically washing dishes using cold water or hot water. As described in a conventional dishwasher, as described in European Patent Publication EP1543759A2, a main body, a washing tank formed in the main body, and a dish basket installed inside the washing tank are provided. And a top nozzle, a stop nozzle, and a bottom nozzle installed at the top, the middle and the bottom of the washing tank to spray the washing water.

The lower surface of the washing tank is provided with a sump for accommodating the washing water and pumping the washing water with each nozzle. The sump structure includes a sump housing forming its appearance and an impeller casing provided with an impeller pumping the washing water. Is provided, the communication hole is provided in the portion of the washing water flowing into the impeller.

In the conventional dishwasher, when the wash water is accommodated in the sump housing, the surface of the wash water is spaced apart from the lower surface of the impeller casing, and when the impeller rotates, not only the wash water but also the air flows into the impeller at the same time, thereby forming air bubbles inside the wash water.

Thus, when the washing water containing the air bubbles is injected by the nozzle provided in the washing tank, there is a problem that the spray pressure of the washing water is significantly lowered by the cavitation phenomenon that the air bubbles burst, reducing the washing power of the dishwasher.

In addition, in order to improve the cleaning power in consideration of such cavitation phenomenon, there is a problem in that the power consumption or the amount of the washing water consumed is consumed because more washing water must be sucked and sprayed at a unit time.

An object of the present invention is to provide a dishwasher which can increase the washing performance by preventing the cavitation phenomenon when spraying the washing water when the dishwasher is operated.

In addition, the object of the present invention is to provide a dishwasher capable of reducing power consumption and amount of washing water by preventing such cavitation.

The present invention for achieving this object, the sump housing constituting the appearance of the sump; An impeller installed on an upper surface of the sump housing and pumping the washing water; An impeller casing in which the impeller is placed; A communication hole provided in the impeller casing and guiding the introduction of the washing water by the impeller; It is provided around the communication hole provides a dishwasher comprising an air inlet prevention rib to prevent the inflow of air when pumping the wash water.

In addition, the air inflow prevention ribs are formed in an annular shape and extends downwardly from the lower surface of the impeller casing, spaced apart from the first air inflow prevention ribs and the first air inflow prevention ribs surrounding the communication hole, And a second air inflow prevention rib surrounding the first air inflow prevention rib.

In addition, the second air inflow prevention rib is characterized in that the air discharge hole for discharging the air located between the first air inflow prevention rib and the second air inflow prevention rib is provided.

In addition, the first air inflow prevention rib and the second air inflow prevention rib is characterized in that it is provided in an annular shape.

In addition, the diameter of the first air inflow prevention rib is larger than the diameter of the communication hole, the diameter of the second air inflow prevention rib is characterized in that it is formed larger than the diameter of the first air inflow prevention rib.

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

As shown in FIG. 1, the dishwasher according to the present invention includes a main body 1 forming an exterior thereof, a washing tank 2 provided inside the main body, and a rack installed on sidewalls of the washing tank 2. (5) is arranged, the rack (5) is provided with an upper rack (5a) and a lower rack (5b), the rack (5) and the upper tableware basket (7a) and the lower portion to place dishes such as dishes The dish basket 7b is provided.

On the other hand, the upper and the middle and lower ends of the washing tank (2) is provided with an upper nozzle (10a), a stop nozzle (10b), and a lower nozzle (10c) for spraying the washing water, respectively, the spraying direction of these nozzles is the dish basket 7a, 7b, the nozzle rotates due to the injection pressure of the sprayed washing water, and the washing water sprayed from the nozzles 10a, 10b, 10c is disposed in the dish baskets 7a, 7b. Crash with and exert strong cleaning power.

The lower surface of the washing tank (2) is provided with a sump (13) for receiving and pumping the washing water to the nozzles.

The rear side of the washing tank (2) is provided with a transfer pipe 11 for supplying the washing water to the stop nozzle (10b) and the top nozzle (10a), the lower end of the transfer pipe 11 is connected to the sump (13) As a result, the washing water flowing due to the strong pumping pressure of the sump 13 moves to the stop nozzle 10b and the upper nozzle 10a by being guided by the transfer pipe 11.

In addition, the lower nozzle 10c is directly connected to the central portion of the upper part of the sump 13, and a part of the washing water is injected through the lower nozzle 10c to be in close proximity to the lower nozzle 10c. The dishes in the dish basket 7b are washed.

In the present invention, when the dishware is relatively small, put the dish only in the upper dish basket (7 a) to spray the washing water only in the upper nozzle (10a) and the stop nozzle (10b) and the washing water is not sprayed from the lower nozzle (10c) Not preferred, but vice versa belongs to the scope that can be implemented by those skilled in the art.

On the other hand, when looking at the sump 13, the sump housing 16 forming its appearance, the sump cover 19 covering the sump housing 16, and the impeller 21 accommodated in the sump housing 16. And, it can be seen that the impeller casing 24, the impeller 21 is installed, and the impeller casing cover 27 mounted on the impeller casing 24.

The impeller casing 24 is provided with a first air inflow prevention rib 22 and a second air inflow prevention rib 23 extending downward by a predetermined length toward the sump housing 16. .

The pump motor 30 for driving the impeller 21 is installed at the lower part of the sump housing 16, which is characterized in that it is screwed to be integral with the sump housing 16.

In addition, a drain pump 33 is provided on the side of the sump housing 16 to discharge the washing water and the dirt in the sump 13 to the outside of the dishwasher.

A heater 36 for heating the washing water is provided around the sump 13, and a heater installation groove 39 formed along the periphery of the sump 13 is formed in the lower portion of the washing tank 2. The heater 36 is accommodated in the heater installation groove 39.

In addition, after the heater 36 is accommodated in the heater installation groove 39, a heater cover 42 is provided to cover the heater 36 to prevent the heater 36 from being exposed to the outside.

As shown in FIG. 2, when looking at the inside of the washing tank 2, an inflow apparatus 3 into which the washing water is introduced is provided on one side thereof, and the washing water introduced through the inflow apparatus 3 is provided in the washing tank 2. It falls to the bottom surface and flows into the sump 13.

The lower nozzle 10c is rotatably coupled to a central portion of the sump 13, and the transfer pipe 11 is connected to a rear end of the sump 13 to stop the nozzle and the upper nozzle. Guide wash water to (not shown).

A sump cover 19 is installed on an upper surface of the sump 13, and the inlet 19a is provided at a predetermined interval at a periphery of the sump cover 19 so that the washing water is guided by the inlet 19a. (13) It is flowing inside.

Meanwhile, a filter cover 20 is provided on an upper surface of the sump cover 19, and a mesh filter 20a is installed on the filter cover 20 so that the dirt collected in a dirt chamber (not shown) will be described later. Ensure that only flushing water flows out of the dirt chamber while avoiding overflow from the chamber.

In addition, the heater 36 is installed in an annular shape around the sump 13, and a heater cover 42 is provided on the heater 13, and a hollow portion (3) is provided on the surface of the heater cover 42. 42a) is provided, and the washing water flows through the hollow part 42a to the heater 39, and is heated to flow into the sump 13.

3 shows a structure of the sump 13, and a pump installation unit 50 in which a drain pump 33 is installed is provided at one side of the sump housing 16, and the pump installation unit 50 is provided. One side of is provided with a drain pipe 51 for guiding the discharge of the washing water and dirt.

In addition, it can be seen that the pump motor 30 is installed on the lower surface of the sump housing 16, and the rotation shaft 30a of the pump motor 30 protrudes through the lower surface of the sump housing 16. It is.

At this time, the sealing member 53 surrounding the rotating shaft 30a is provided at the central portion of the lower surface of the sump housing 16 so that the washing water does not leak toward the pump motor 30.

On the other hand, the impeller casing 24 is provided on the upper surface of the sump housing 16, a communication hole 24a communicating with the sump housing 16 is formed at the central portion of the impeller casing 24, the communication The impeller accommodation part 24b in which the said impeller 21 is installed is provided in the circumference | surroundings of the ball 24a.

In addition, the impeller casing 24 has a first and second air inflow prevention ribs (not shown) surrounding the communication hole 24a is provided below, which will be described in detail later.

The impeller 21 rotates in combination with the rotation shaft 30a of the pump motor 30 to pull up the fine water contained in the washing water and the washing water introduced into the sump housing 16.

The impeller casing 24 is provided with a main flow passage 24c and a sub flow passage 24d branched from the impeller accommodation portion 24b, and the main flow passage 24c includes the upper nozzle (refer to FIG. 1 and 10a). The stop nozzle (see Fig. 1, 10b) guides the washing water moving, and the sub-channel 24d serves to guide the washing water moving to the lower nozzle (see Fig. 1, 10c).

In addition, the flow path control valve 25 is rotatably installed in the sub-channel 24d, which serves to control the flow of the washing water flowing into the sub-channel 24d, when the amount of dishes to be cleaned is small. In this case, the flow path control valve 25 blocks the sub channel 24d so that the washing water flows only into the main channel 24c.

As a result, the washing water moving under the guidance of the main flow passage 24c is sprayed from the upper nozzles (see FIG. 1 and 10a) and the stop nozzles (FIGS. 1 and 10b) to wash the dishes. If the amount is small, it is to save the washing water by reducing the washing water requirement.

Meanwhile, a dirt chamber 24e is formed next to the main flow passage 24c, which is crushed by the grinding apparatus 17, passes through the filter 18, and the main flow passage 24c by the impeller 21. Fine dirt that flows into) is collected to be collected with the wash water.

In addition, near the inlet of the waste chamber 24e, a drain conveying pipe 26 connected to the drain pump 33 is installed. When the drain pump 33 operates, the waste collected in the waste chamber 24e is discharged. By the operation of the drain pump 33 is discharged toward the drain pipe 51 along the drain transfer pipe 26 to automatically exit to the outside of the dishwasher.

The impeller casing cover 27 is provided on the impeller casing 24. The impeller casing cover 27 is provided with a guide flow path 27a communicating with the sub flow path 24d, and the guide flow path 27a. Extends to the center of the impeller casing cover 27 while drawing a curve at the periphery of the impeller casing cover 27.

Therefore, when the passage control valve 25 opens the sub passage 24d, the washing water pumped by the impeller 21 moves through the control valve 25 and moves along the sub passage 24d. After the movement through the guide passage (27a) in communication with the sub-channel (24d) to the lower nozzle (see Fig. 1, 10c) is injected.

Meanwhile, a sump cover 19 is provided at an upper portion of the impeller casing cover 27, and a coupling hole 19c is coupled to a lower portion of the lower nozzle (see FIG. 1, 10c) at a central portion of the sump cover 19. Is provided, and a plurality of inlets 19a through which the washing water is introduced are spaced apart at predetermined intervals from the periphery of the sump cover 19.

In addition, the impeller casing cover 27 is provided with a connection hole 19b for allowing the transfer pipe (see FIG. 2 and 11) to penetrate and be connected to the main flow passage 24c.

A filter cover 20 is provided at an upper portion of the sump cover 19, and the mesh filter 20a is installed at the filter cover 20 to cover an upper surface of the dirt chamber 24e. The dirt contained in 24e serves to prevent the mesh filter 20a from coming out along the washing water.

That is, when the wash water and the dirt enter the dirt chamber 24e by the mesh filter 20a, the wash water passes through the mesh filter 20a, but the dirt is caught by the mesh filter 20a and thus the dirt chamber. If the waste remains in the 24e and the waste accumulates in the waste chamber 24e to some extent, the drainage pump 33 operates as described above to take out the waste.

The wash water separated from the dirt moves back to the inlet port 19a to be introduced into the sump 13 and continues to circulate while going through the above-described process.

Meanwhile, it can be seen that the heater (see FIG. 2 and 36) and the heater cover 42 are provided around the sump 13 to surround the sump 13.

As shown in FIG. 4, the communication hole 24a is provided at a lower surface of the impeller casing 24, and the first air inflow prevention rib 22 is provided at the periphery of the communication hole 24a. The second air inflow preventing rib 23 is provided at a portion spaced apart from the first air inflow preventing rib 22 by a predetermined distance.

The first and second air inflow preventing ribs 22 and 23 are formed in a circular ring shape, and the diameter of the first air inflow preventing rib 22 is formed larger than the diameter of the communication hole 24a. The diameter of the second air inflow prevention rib 23 is larger than the diameter of the first air inflow prevention rib 23.

The role of the first and second air inflow prevention ribs 22 and 23 is to minimize the air contained in the washing water so that the air is discharged from the washing tank (not shown) after the washing water is pumped by the impeller (not shown). This is to prevent the drop of washing water spray pressure due to the drop.

Meanwhile, an air discharge hole 23a is provided in the second air inflow prevention rib 23, which prevents the air located between the first and second air inflow prevention ribs 22 and 23 from the second air inflow prevention rib 23. This is to discharge the rib 23 to the outside.

 Hereinafter, an operation of the present invention will be described with reference to the accompanying drawings.

However, the case where the air inflow prevention rib 22 is installed and the case where it is not installed will be divided and described.

As disclosed in FIG. 5, when the wash water flows into the sump housing 16 while the impeller casing 24 is coupled to the sump housing 16, the surface of the wash water W is the impeller casing 24. Form a certain distance from the lower surface.

In this state, when the impeller 21 rotates, the washing water contained in the sump housing 16 is pumped by the impeller 21 to the impeller casing 24, and the main flow path 24c and the Sub-channel 24d is moved.

However, at this time, not only the washing water is pumped, but also the air A between the washing water and the impeller casing 24 is mixed with the washing water by the suction action of the impeller 21.

Therefore, the washing water is pumped with the air bubbles (B) included, and when the washing water containing the air bubbles is sprayed from the nozzles (10a, 10b, 10c) inside the washing tank (see Fig. 1, 2), Cavitation phenomenon that bursts air bubbles in the wash water occurs.

Therefore, the jet pressure of the washing water is significantly lowered by such cavitation phenomenon, and in order to prevent the lowering of the jet pressure, the washing water must be injected more strongly, so that the rotational speed of the impeller 21 is increased or the washing water is increased. Since the amount must be increased, the energy consumption becomes relatively large.

However, as disclosed in FIG. 6, in the state where the first and second air inflow prevention ribs 22 and 23 are provided under the impeller casing 24, the first wash water flows into the sump housing 16. When the impeller 21 operates, the washing water is sucked by the suction force of the impeller 21.

By the way, if the ends of the first and second air inflow prevention ribs 22 and 23 are accommodated in the wash water, after the impeller 21 operates for a predetermined time, the first air inflow prevention rib 22 and Air existing between the second air inflow preventing ribs 23 is discharged to the outside under the guidance of the air discharge hole 23a.

That is, if there is no air discharge hole (23a), air is collected in the upper space provided between the first and second air inflow prevention ribs (22, 23), the level of the washing water can be raised any more due to the air However, due to the air discharge hole 23a, the air collected in such a space can be discharged to the outside.

Meanwhile, the washing water is pumped by the operation of the impeller 21 while gathering the lower portion of the impeller 21, and the washing water immediately before being pumped by the impeller 21 is the first air inflow preventing rib 22. The water is collected in a space provided in the inside of the air, and the flow of air outside and inside the first air inflow prevention ribs 22 is blocked so that the air is no longer located in the space, so that air bubbles are not included in the wash water. Will be.

That is, as the impeller 21 operates, the pressure inside the first air inflow prevention rib 22 drops sharply, so that the washing water fills the inside of the first air inflow prevention rib 22, and the air disappears from the portion. do.

After this state is formed, the washing water sucked by the impeller 21 moves to the main channel 24c or the sub channel 24d without spraying and is sprayed from the nozzles 10a, 10b, and 10c. Therefore, the phenomenon of cavitation can be prevented from occurring, and the phenomenon of lowering the injection pressure can also be prevented.

By the present invention it is possible to prevent the formation of air bubbles in the washing water pumped by the impeller to prevent the occurrence of cavitation when spraying the washing water from the nozzle.

Therefore, the spray pressure of the washing water at the nozzle can be prevented from being reduced, and it is not necessary to add the energy and the washing water required to increase the spray pressure, so that it is more economical than the conventional dishwasher without the air inlet rib. Can be planned.

Claims (5)

A sump housing constituting an appearance of the sump; An impeller installed on an upper surface of the sump housing and pumping the washing water; An impeller casing in which the impeller is placed; A communication hole provided in the impeller casing and guiding the introduction of the washing water by the impeller; A flow path control valve provided in the impeller casing to guide the washing water to the sub-channel or the main channel and to adjust the required amount of the washing water according to the amount of dish washing; It is provided around the communication hole to include an air inlet prevention rib to prevent the inflow of air when pumping the washing water, The air inflow prevention rib is formed in an annular shape and extends downward from the lower surface of the impeller casing, And a first air inflow prevention rib surrounding the communication hole and a second air inflow prevention rib spaced apart from the first air inflow prevention rib at a predetermined interval and surrounding the first air inflow prevention rib. Dishwasher. delete The method of claim 1, And the second air inflow prevention rib is provided with an air discharge hole for discharging air located between the first air inflow prevention rib and the second air inflow prevention rib. The method of claim 1, And the first air inflow prevention rib and the second air inflow prevention rib are provided in an annular shape. 5. The method of claim 4, And the diameter of the first air inflow prevention rib is greater than the diameter of the communication hole, and the diameter of the second air inflow prevention rib is larger than the diameter of the first air inflow prevention rib.

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