DISHWASHER

Abstract

The present invention relates to a dish washer. The dish washer includes a plurality of water feeding channels (21, 22, 23) for feeding water to dishes received in a washing tub, a supply (103) channel for supplying water to the water feeding channels (21, 22, 23) and a rotary member (104, 4) disposed in the supply channel (103) such that the rotary member (104, 4) is raised while rotating along the supply channel, (103), when water is supplied to the supply channel (103), to communicate with at least one of the water feeding channels (21, 22, 23) to supply the water to the at least one of the water feeding channels (21, 22, 23), and is lowered while rotating along the supply channel (103), when the supply of water is interrupted.

Description

TECHNICAL FIELD

The present invention relates to a dish washer. The dish washer is an apparatus that automatically washes dishes. Dishes are placed in a washing tub, and water is sprayed to the dishes through a plurality of nozzles mounted in the washing tub, thereby washing the dishes.

BACKGROUND ART

Recently, a dish washer is proposed which is capable of selectively spraying water to dishes through any one selected from a plurality of nozzles. With this structure, it is possible to reduce the amount of water necessary to wash dishes and the weight of a pump.

FIGS. 1 to 4 illustrate a dish washer disclosed in Japanese Patent Application Publication No. H11-019019. As shown in FIG. 1, the conventional dish washer 100 includes a washing tub 110 and a machine room 112.

In the washing tub 110 are mounted a tray, in which dishes 191 are placed, and a plurality of nozzles 102a to 102h for spraying water to wash the dishes 191. The machine room 112 is separated from the washing tub 110 by a partition wall 111. In the machine room 112 are mounted a pump 105 for supplying water to the nozzles 102a to 102h, a pipe 150 for circulating water supplied into the washing tub 110, a drainage pipe 152, a drainage pump 151, and a drainage valve 153 for draining water, and a supply channel 103 located between the pump 105 and the nozzles 102a to 102h for selectively supplying water to the nozzles 102a to 102h. Also, a filter 155 is mounted to the partition wall 111. Water moves from the washing tub 110 to the pipe 150 through the filter 155. On the other hand, a water feeding valve 154 is mounted at one side of the washing tub 110. Unexplained reference numerals 106a to 106h indicate sensors.

FIGS. 2 and 3 illustrate an example of the supply channel 103. The supply channel 103 includes a cylindrical body 103a and a rotary member 104, which cooperate with each other to selectively open and close the nozzles 102a to 102h. The cylindrical body 103a has a plurality of holes 132 communicating with the nozzles 102a to 102h and a zigzag opening 131 for guiding the rotation of the rotary member 104. The rotary member 104 is disposed in the cylindrical body 103a. The rotary member 104 rotates in the cylindrical body 103a. The rotary member 104 includes an opening 142 communicating with any one of the holes 132 and a protrusion 141 cooperating with the zigzag opening 131.

FIGS. 4 to 6 are views illustrating the continuous operation of the cylindrical body 103a and the rotary member 104. While the pump is off, as shown in FIG. 4, the rotary member 104 remains lowered. When the pump is turned on, as shown in FIG. 5, water is supplied into the rotary member 104, and the rotary member 104 is raised by the water supplied into the rotary member 104. At this time, although not shown in the drawings, the protrusion 141 of the rotary member 104 is guided by the opening 131 of the cylindrical body 103a. Consequently, the rotary member 104 is raised, and, at the same time, is rotated When the top of the rotary member 104 comes into contact with the cylindrical member 103, as shown in FIG. 6, the rotary member 104 is stopped, and the opening 142 of the rotary member 104 communicates with one of the holes 132, with the result that the water is supplied to the washing tub 110, specifically the dishes 191, through one of the nozzles 102a to 102h. When the pump 105 is turned off after a predetermined period of time, the rotary member 104 is lowered. At this time, the protrusion 141 is guided by the zigzag opening 131, and therefore, the rotary member 104 is rotated.

However, the conventional dish washer with the above-stated construction has a problem in that, when water is selectively supplied into the washing tub 110 through one of the nozzles 102a to 102h, as shown in FIG. 6, the water collides with the inside top of the rotary member 105, and is then supplied to the washing tub 110 through the opening 132, formed at the side of the rotary member 104, with the result that the flow of the water is bent, and therefore, the flow loss of the water occurs.

Furthermore, water is not supplied to one of the nozzles 102a to 102h until the rotary member 104 is completely raised, with the result that the rapid supply of water is not accomplished.

DISCLOSURE OF INVENTION

Technical Problem

An object of the present invention devised to solve the problem lies on a dish washer that is capable of selectively supplying water to a plurality of nozzles or channels.

Another object of the present invention devised to solve the problem lies on a dish washer that is capable of guiding a rotary member used to selectively supply water to a plurality of nozzles or channels through the channels.

Another object of the present invention devised to solve the problem lies on a dish washer that is capable of selectively supplying water to a plurality of nozzles or channels while reducing the flow loss of the water passing through a rotary member.

Another object of the present invention devised to solve the problem lies on a dish washer that is capable of selectively and rapidly supplying water to a plurality of nozzles or channels.

Another object of the present invention devised to solve the problem lies on a dish washer that is capable of supplying water to a plurality of nozzles or channels without the flow loss of water and/or rapidly by forming an opening at a rotary member in the same direction as the flow direction of the water.

Another object of the present invention devised to solve the problem lies on a dish washer that is capable of stably and selectively opening and closing a plurality of nozzles or channels through the use of a guide for rotating a rotary member.

A further object of the present invention devised to solve the problem lies on a dish washer that is capable of stably and selectively opening and closing a plurality of nozzles or channels by guiding a rotary member such that the rotary member is brought into surface contact with a guide. When a protrusion of the rotary member and the guide are located on the same circumference such that the protrusion is brought into surface contact with the guide, the supply of water only to the selected one of the channels is more stably accomplished.

Technical Solution

The object of the present invention can be achieved by providing a dish washer including a plurality of water feeding channels for feeding water to dishes received in a washing tub, a supply channel for supplying water to the water feeding channels, and a rotary member disposed in the supply channel such that the rotary member is raised while rotating along the supply channel, when water is supplied to the supply channel, to communicate with at least one of the water feeding channels to supply the water to the at least one of the water feeding channels, and is lowered while rotating along the supply channel, when the supply of water is interrupted.

In another aspect of the present invention, provided herein is a dish washer in cluing a plurality of water feeding channels for feeding water to dishes, a supply channel for supplying water to the water feeding channels, a rotary member disposed in the supply channel such that the rotary member is raised along the supply channel, when water is supplied to the supply channel, and the rotary member is lowered along the supply channel, when the supply of water to the supply channel is interrupted, the rotary member having an opening communicating with a part of the water feeding channels when the rotary member is raised, a first guide disposed above the rotary member for guiding the rotary member such that the rotary member can be raised while rotating, and a second guide disposed below the rotary member for guiding the rotary member such that the rotary member can be lowered while rotating.

In another aspect of the present invention, provided herein is a dish washer including a plurality of water feeding channels for feeding water to dishes, a supply channel for supplying water to the water feeding channels, a rotary member constructed such that the rotary member is raised along the supply channel, when water is supplied to the supply channel, and the rotary member is lowered along the supply channel, when the supply of water to the supply channel is interrupted, the rotary member having an opening communicating with a part of the water feeding channels when the rotary member is raised, and a guide disposed above the rotary member for guiding the rotary member such that the rotary member can be raised while rotating by the surface contact between the guide and the top of the rotary member.

In a further aspect of the present invention, provided herein is a dish washer including a plurality of water feeding channels for feeding water to dishes, a supply channel for supplying water to the water feeding channels, a rotary member constructed such that the rotary member is raised along the supply channel, when water is supplied to the supply channel, and the rotary member is lowered along the supply channel, when the supply of water to the supply channel is interrupted, the rotary member having an opening communicating with a part of the water feeding channels when the rotary member is raised, and a guide disposed below the rotary member, the guide being provided at the surface where the supply channel is formed, such that the flow of water is not disturbed, for guiding the rotary member such that the rotary member can be lowered while rotating.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention, illustrate embodiments of the invention and together with the description serve to explain the principle of the invention.

In the drawings:

FIG. 1 is a perspective view illustrating a conventional dish washer.

FIG. 2 is an enlarged view illustrating a supply channel of FIG. 1.

FIG. 3 is an exploded perspective view of FIG. 2.

FIGS. 4 to 6 are views illustrating the continuous operation of the supply channel of FIG. 2.

FIG. 7 is an exploded perspective view illustrating water feeding channels, a supply channel, and a rotary member of a dish washer according to an embodiment of the present invention.

FIG. 8 is a perspective view illustrating a channel cover defining the water feeding channel of FIG. 7.

FIG. 9 is a perspective view illustrating a lower channel defining the water feeding channel of FIG. 7.

FIG. 10 is a perspective view illustrating the rotary member of FIG. 7.

FIGS. 11 to 14 are views illustrating the continuous operation of the rotary member of the dish washer according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 7 is a perspective view illustrating the interior of a dish washer according to an embodiment of the present invention, more specifically the interior of a washing tub of the dish washer. This embodiment will be described based on a water supply assembly constructed to supply water to any one of a plurality of nozzles mounted in the washing tub, among components constituting the dish washer.

Referring to FIG. 7, the water supply assembly includes a plurality of water feeding channels 21, 22, and 23 for feeding water to dishes received in the washing tub, a supply channel 25 for supplying water to the water feeding channels 21, 22, and 23, and a rotary member 4 movable upward and downward while rotating along the supply channel 25, such that the rotary member 4 communicates with at least one of the water feeding channels 21, 22, and 23, for supplying water to the at least one water feeding channel.

The water feeding channels 21, 22, and 23 are located in the washing tub of the dish washer, preferably on the bottom 11 of the washing tub. When the dish washer is constructed in a structure in which the water feeding channels 21, 22, and 23 are located on the bottom 11 of the washing tub, wash water, supplied into the washing tub through the water feeding channels 21, 22, and 23, is sprayed to dishes received in the washing tub from the bottom 11 of the washing tub.

In the dish washer according to the present invention, the water feeding channels 21, 22, and 23 are defined by a space between a channel cover 24 and a lower channel 20. As shown in FIG. 7, the lower channel 20 is located on the bottom 11 of the washing tub. In this case, the lower channel 20 may be manufactured separately and then mounted to the bottom 11 of the washing tub. Preferably, however, the lower channel 20 is constituted by a plurality of grooves 31, 32, and 33 formed at the bottom 11 of the washing tub.

Specifically, the tip end of the supply channel 25, to which water is supplied, communicates with the bottom 11 of the washing tub, and the grooves 31, 32, and 33 are formed at the bottom 11 of the washing tub about the tip end of the supply channel 25 in a radial fashion to define the water feeding channels 21, 22, and 23.

The channel cover 24 is formed in a shape corresponding to the grooves 31, 32, and 33 defining the lower channel 20 for covering the tops of the water feeding channels 21, 22, and 23. Specifically, the channel cover 24 includes a cylindrical body part 24d, the lower part of which is inserted into the supply channel 25, and a plurality of blade parts 24a, 24b, and 24c extending from the body part 24d for covering the tops of the water feeding channels 21, 22, and 23, respectively. Also, nozzles 32, 34, and 36, for spraying water to the interior of the washing tub, are mounted at the tip ends of the blade parts 24a, 24b, and 24c.

Meanwhile, the body part 24d is preferably provided with a rising guide 60 for guiding the rotary member 4, such that the rotary member 4 can be rotated, when the rotary member 4 is raised by the pressure of water, as will be described below. Preferably, the dish washer according to the present invention further includes a lowering guide 50 mounted at the inside of the supply channel 25 for guiding the rotary member 4, such that the rotary member 4 can be rotated, when water is not supplied to the supply channel 25, and therefore, the rotary member is lowered in the supply channel 25. The rising guide 60 and the lowering guide 50 will be described below in detail.

The rotary member 4 is located in the supply channel 25 such that the rotary member 4 can be raised and lowered by the pressure of water supplied along the supply channel 25. Specifically, when water is supplied to the supply channel 25 by the pump (not shown), the rotary member 4 is raised by the pressure of the water. When the pump is not operated, and therefore, water is not supplied to the supply channel 25, the rotary member 4 is lowered. Hereinafter, the respective components will be described in more detail with the accompanying drawings.

FIG. 8 is a perspective view illustrating the channel cover 24 of FIG. 7 when viewed from the bottom of the channel cover 24.

Referring to FIG. 8, the channel cover 24 includes the blade parts 24a, 24b, and 24c for covering the water feeding channels 21, 22, and 23, respectively, and the cylindrical body part 24d, to which the blade parts 24a, 24b, and 24c are connected, as previously described. The cylindrical body part 24d will be inserted into the supply channel 25.

The rising guide 60, corresponding to an upper protrusion 4c of the rotary member 4, which will be described below, is formed at the bottom of the cylindrical body part 24d. In the cylindrical body part 24d is mounted a partitioning member 24e for partitioning the interior of the cylindrical body part 24d into a plurality of spaces communicating with the respective water feeding channels 21, 22, and 23. At the top of the cylindrical body part 24d is formed an opening 24f communicating with the water feeing channels 21, 22, and 23.

Consequently, when the channel cover 24 is mounted at the top of the lower channel 20, the lower part of the cylindrical body part 24d is inserted into the supply channel 25, and the rotary member 4 is located at the bottom of the rising guide 60, formed at the bottom of the cylindrical body part 24d, in the supply channel 25.

Referring to FIGS. 7 and 8, the rising guide 60 inclines a plurality of rising protrusions formed at the bottom of the cylindrical body part 24d. The rising protrusions are formed in a shape corresponding to the upper protrusion 4c of the rotary member 4, which will be described below. When the rotary member 4 is raised, the rising guide 60 comes into contact with the upper protrusion 4c to guide the rotary movement of the rotary member 4.

The partitioning member 24e partitions the interior of the body part 24d to correspond to the water feeding channels 21, 22, and 23. For example, when the number of the water feeding channels 21, 22, and 23 is three, as shown in the drawings, the partitioning member 24e partitions the interior of the body part 24d into three spaces. In this case, the body part 24d is formed in the sectional shape of a circle, and therefore, the partitioning member 24e includes three partitioning walls extending from the center of the body part 24d to the circumference of the body part 24d while the partitioning walls are disposed at intervals of 120 degrees.

Specifically, the three partitioning walls extend from the center of the body part 24d to the circumference of the body part 24d, while the partitioning walls are disposed at intervals of 120 degrees, and therefore, the interior of the body part 24d is partitioned into the three spaces. Consequently, when water is supplied into any one space of the body part 24d by the rotary member 4, as will be described below, the water is supplied to the water feeding channel communicating with the space, and therefore, the water is supplied into the dish washer.

FIG. 9 is a perspective view illustrating the lower channel of FIG. 7.

Referring to FIG. 9, the lower channel includes the plurality of grooves 31, 32, and 33 formed at the bottom of the washing tub, as previously described. The grooves 31, 32, and 33 communicate with the supply channel 25, along which water is supplied.

In the supply channel 25 are also disposed the rotary member 4 movable upward and downward while rotating, depending upon whether the water is supplied or not, for supplying water to any one of the water feeding channels 21, 22, and 23, and the lowering guide 60 for guiding the rotary member 4, such that the rotary member 4 can be rotated, when the rotary member 4 is lowered, as previously described.

Referring to FIGS. 7 and 9, the lowering guide 60 includes a plurality of lowering protrusions formed at the bottom of the rotary member 4 in the supply channel 25 such that the lowering protrusions extend upward. The lowering protrusions may be manufactured separately and then mounted in the supply channel 25. Alternatively, the lowering protrusions may protrude, as a single member, along the inner surface of the supply channel 25. On the other hand, the lowering protrusions are formed in a shape corresponding to the lower protrusion 4d of the rotary member 4. When the rotary member 4 is lowered, the lowering protrusions come into contact with the lower protrusion 4d to guide the rotary movement of the rotary member 4.

The rotary member 4 is illustrated in detail in FIG. 10.

Referring to FIG. 10, the rotary member 4 includes a disc 4b having an opening 4a for allowing the water, supplied to the supply channel 25 by the pump, to flow therethrough such that the water can flow to any one of the water feeding channels 21, 22, and 23, an upper protrusion 4c formed along the circumference of the disc 4b, the upper protrusion 4c corresponding to the rising guide of the channel cover 24, and a lower protrusion 4d formed along the circumference of the disc 4b, the lower protrusion 4d corresponding to the lowering guide 50 disposed in the supply channel 25.

Here, the shape of the opening 4a is closely related with the partitioning member 24e of the channel cover 24. Specifically, the water, flows through the opening 4a of the rotary member 4, is supplied to any one of the water feeding channels 21, 22, and 23, and therefore, it is preferable for the opening 4a to be formed in a shape corresponding to that of the partitioning walls of the partitioning member 24e. When the number of the water feeding channels 21, 22, and 23 is three according to the embodiment of the present invention, as previously described with reference to FIG. 8, the partitioning walls of the partitioning member 24e are disposed at intervals of 120 degrees. Consequently, as shown in FIG. 10, the opening 4a preferably has a spreading angle of 120 degrees such that the opening 4a corresponds to any one of the water feeding channels 21, 22, and 23.

Consequently, when the rotary member 4 is located in the supply channel 25, and water is supplied to the rotary member 4, the pressure of the water is applied to the remaining part of the disc 4b, excluding the opening 4a, with the result that the rotary member 4 is raised. When the rotary member 4 is raised in the supply channel 25 by the pressure of the water, and therefore, the rotary member 4 is brought into tight contact with the bottom of the body part 24d, the opening 4a of the rotary member 4 communicates with any one of the spaces partitioned by the partitioning member 24e, with the result that the water is supplied to any one of the water feeding channels 21, 22, and 23.

Meanwhile, the upper protrusion 4c has a plurality of vertexes 4e. Specifically, the upper protrusion 4c has three vertexes 4e when the number of the water feeding channels 21, 22, and 23 is three. The three vertexes 4e are preferably disposed at intervals of 120 degrees. The length of two sides 4f and 4g forming each vertex 4e is not particularly restricted. However, it is preferable to relatively increase the length of the side 4f guided by the rising guide 60 such that the rotary member 4 can be stably guided.

The lower protrusion 4d also has a plurality of vertexes 4h. Preferably, the lower protrusion 4d has the same number of vertexes 4h as the upper protrusion 4c. Consequently, when the number of the vertexes 4e of the upper protrusion 4c is three, the number of the vertexes 4h of the lower protrusion 4d is also three. The positional relationship between the vertexes 4e of the upper protrusion 4c and the vertexes 4h of the lower protrusion 4d will be described below.

FIGS. 11 to 14 are views illustrating the operation of the rotary member 4 of the dish washer according to the present invention.

Specifically, FIG. 11 illustrates that the rotary member 4 is located between the rising guide 60 and the lowering guide 50, when the rotary member 4 is raised by the water supplied into the supply channel 25, and FIG. 12 illustrates that the rotary member 4 is partially brought into contact with the rising guide 60 as a result of the upward movement of the rotary member 4. For clarity, the supply channel 25 is not shown in FIGS. 11 and 12. Consequently, only the rising guide 60 of the channel cover 24, the rotary member 4, and the lowering guide 50, all of which are located in the supply channel 25, are shown in the drawings.

When water is supplied into the supply channel 25 by the pump (not shown), the pressure of the water is applied to the rotary member 4, located in the supply channel 25, such that the rotary member 4 is moved upward. This is because the pressure of the water is applied to the remaining part of the disc 4b of the rotary member 4, excluding the opening 4a. Consequently, the rotary member 4 is raised in the direction indicated by an arrow shown in FIG. 11.

As the rotary member 4 is raised, as shown in FIG. 12, the upper protrusion 4c of the rotary member 4, specifically the vertexes 4e, comes into contact with the rising guide 60. In this case, the vertexes 4e and the sides 4f forming the respective vertexes 4e slide along the rising guide 60, with the result that the rotary member 4 is raised in the direction indicated by arrow A, and, at the same time, is rotated in the direction indicated by arrow B.

When the rotary member 4 is completely raised, and therefore, as shown in FIG. 13, the rotary member 4 comes into tight contact with the bottom of the body part 24d of the channel cover 24, the opening 4a of the rotary member 4 communicates with any one of the spaces defined in the body part 24d, which are partitioned by the partitioning member 24e, with the result that water is supplied to any one of the water feeding channels 21, 22, and 23.

Meanwhile, the water flows to the water feeding channels 21, 22, and 23 through the opening 4a, during the above-described processes, the flow loss of the water is reduced, and the water is rapidly supplied to the selected channel. Also, the pressure applied to the disc 4b is reduced, and therefore, the rotary member 4 is smoothly guided along the guide 60. Furthermore, the rotary member 4 is guided along the supply channel 25, although the rotary member 4 is an asymmetrical structure having the opening 4a, and therefore, the rotary member 4 is not inclined while the rotary member 4 is guided. Consequently, an additional member for preventing the rotary member 4 from being inclined is not needed.

After a predetermined period of time, the operation of the pump is stopped. As a result, the water is not supplied into the supply channel 25, and therefore, as shown in FIG. 14, the rotary member 4 is lowered. When the rotary member 4 is lowered, the vertexes 4h of the lower protrusion 4d slide along the lowering guide 50, with the result that the rotary member 4 is rotated in the direction indicated by arrow C.

Therefore, the rising protrusion of the rising guide 60 and the lowering protrusion of the lowering guide 50 must be misaligned with each other, as shown in FIGS. 11 to 14, such that the rotary member 4 can be rotated simultaneously when the rotary member 4 is raised or lowered. If the rising protrusion of the rising guide 60 and the lowering protrusion of the lowering guide 50 are disposed such that the rising protrusion of the rising guide 60 and the lowering protrusion of the lowering guide 50 are aligned with each other, the rotary member 4 is repeatedly raised and lowered depending upon whether the water is supplied or not, but is not rotated.

Also, the positional relationship between the vertexes 4e of the upper protrusion 4c and the vertexes 4h of the lower protrusion 4d is not particularly restricted. However, it is required for the upper protrusion 4c to be guided by the rising guide 60, daring the upward movement of the rotary member 4, in consideration of the relationship between the rising guide 60 and the lowering guide 50, and therefore, the vertexes 4e of the upper protrusion 4c are preferably located at the more right side than vertexes 60a of the rising guide 60, guiding the upper protrusion 4c. Also, it is required for the lower protrusion 4d to be guided by the lowering guide 50, during the downward movement of the rotary member 4, and therefore, the vertexes 4h of the lower protrusion 4d are preferably located at the more right side than vertexes 50a of the lowering guide 50, guiding the lower protrusion 4d.

Consequently, the rotary member 4 can be rotated by the guidance of the rising guide 60, daring the upward movement of the rotary member 4, and the rotary member 4 can be rotated by the guidance of the lowering guide 50, during the downward movement of the rotary member 4.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

INDUSTRIAL APPLICABILITY

According to the dish washer of the present invention, it is possible to selectively supply water to a plurality of nozzles or channels.

According to the dish washer of the present invention, it is also possible to guide a rotary member used to selectively supply water to a plurality of nozzles or channels through the channels.

According to the dish washer of the present invention, it is also possible to selectively supply water to a plurality of nozzles or channels while reducing the flow loss of the water passing through a rotary member.

According to the dish washer of the present invention, it is also possible to selectively and rapidly supply water to a plurality of nozzles or channels.

According to the dish washer of the present invention, it is also possible to supply water to a plurality of nozzles or channels without the flow loss of water and/or rapidly by forming an opening at a rotary member in the same direction as the flow direction of the water.

According to the dish washer of the present invention, it is also possible to stably and selectively open and close a plurality of nozzles or channels through the use of a guide for rotating a rotary member.

According to the dish washer of the present invention, it is also possible to stably and selectively open and close a plurality of nozzles or channels by guiding a rotary member such that the rotary member is brought into surface contact with a guide.

Claims

1. A dish washer comprising:

a plurality of water feeding channels for feeding water to dishes received in a washing tub;

a supply channel for supplying water to the water feeding channels; and

a rotary member guided by the supply channel such that the rotary member is raised while rotating along the supply channel, when water is supplied to the supply channel, to communicate with at least one of the water feeding channels to supply the water to the at least one of the water feeding channels, and is lowered while rotating along the supply channel, when the supply of water to the supply channel is interrupted.

2. The dish washer according to claim 1, wherein the water flows about the rotary member in the same direction.

3. The dish washer according to claim 1, wherein the rotary member includes:

a disc having an opening formed in a predetermined shape;

at least one upper protrusion formed at the top of the disc; and

at least one lower protrusion formed at the bottom of the disc.

4. The dish washer according to claim 3, wherein the opening is formed in the disc such that the water flows about the rotary member in the supply channel in the same direction.

5. The dish washer according to claim 3, wherein the at least one upper protrusion and the at least one lower protrusion have the same number as the water feeding channels.

6. The dish washer according to claim 5, further comprising:

a lower channel disposed at the bottom of the washing tub; and

a channel cover disposed at the top of the lower channel,

wherein the water feeding channels are defined between the lower channel and the channel cover.

7. The dish washer according to claim 6, wherein the lower channel includes a plurality of grooves formed at the bottom of the washing tub.

8. The dish washer according to claim 7, wherein the supply channel has a tip end communicating with the bottom of the washing tub, and the grooves are formed about the tip end of the supply channel in a radial fashion.

9. The dish washer according to claim 6, wherein the channel cover has a shape corresponding to the lower channel.

10. The dish washer according to claim 9, wherein the channel cover includes:

a body part communicating with the supply channel, the body part having a rising guide, corresponding to the upper protrusion, for guiding the rotary member, such that the rotary member can be rotated, when the rotary member is raised, and

a plurality of blade parts communicating with the body part, the blade parts extending from the body part in a radial fashion.

11. The dish washer according to claim 10, wherein the channel cover further includes:

a partitioning member for partitioning the interior of the body part into a plurality of spaces communicating with the respective blade parts.

12. The dish washer according to claim 11, wherein the opening communicates with at least one of the spaces, such that water is supplied into the at least one of the spaces, when the rotary member is raised.

13. The dish washer according to claim 10, wherein the rising guide includes a rising protrusion corresponding to the upper protrusion.

14. The dish washer according to claim 13, further comprising:

a lowering guide disposed in the supply channel for guiding the rotary member, such that the rotary member can be rotated, when the rotary member is lowered.

15. The dish washer according to claim 14, wherein the lowering guide includes a lowering protrusion corresponding to the lower protrusion.

16. The dish washer according to claim 15, wherein the rising protrusion and the lowering protrusion are misaligned with each other.

17. A dish washer comprising:

a plurality of water feeding channels for feeding water to dishes;

a supply channel for supplying water to the water feeding channels;

a rotary member disposed in the supply channel such that the rotary member is raised along the supply channel, when water is supplied to the supply channel, and the rotary member is lowered along the supply channel, when the supply of water to the supply channel is interrupted, the rotary member having an opening communicating with a part of the water feeding channels when the rotary member is raised;

a first guide disposed above the rotary member for guiding the rotary member such that the rotary member can be raised while rotating; and

a second guide disposed below the rotary member for guiding the rotary member such that the rotary member can be lowered while rotating.

18. The dish washer according to claim 17, wherein the rotary member includes:

a disc having an opening;

at least one upper protrusion formed at the top of the disc, the at least one upper protrusion communicating with the first guide; and

at least one lower protrusion formed at the bottom of the disc, the at least one lower protrusion communicating with the second guide.

19. The dish washer according to claim 17, wherein the second guide is formed at the surface where the supply channel is formed.

20. The dish washer according to claim 18, wherein the at least one upper protrusion, the at least one lower protrusion, the first guide, and the second guide are arranged such that the rotary member can be rotated in the supply channel in one rotating direction.

21. The dish washer according to claim 18, wherein the at least one upper protrusion, the at least one lower protrusion, the first guide, and the second guide are arranged such that the rotary member can be rotated in the supply channel at regular intervals.

22. A dish washer comprising:

a plurality of water feeding channels for feeding water to dishes;

a supply channel for supplying water to the water feeding channels;

a rotary member constructed such that the rotary member is raised along the supply channel, when water is supplied to the supply channel, and the rotary member is lowered along the supply channel, when the supply of water to the supply channel is interrupted, the rotary member having an opening communicating with a part of the water feeding channels when the rotary member is raised; and

a guide disposed above the rotary member for guiding the rotary member such that the rotary member can be raised while rotating by the surface contact between the guide and the top of the rotary member.

23. The dish washer according to claim 22, wherein the rotary member includes:

a disc having an opening, and

at least one upper protrusion formed along the circumference of the disc such that the at least one upper protrusion comes into surface contact with the guide.

24. A dish washer comprising:

a plurality of water feeding channels for feeding water to dishes;

a supply channel for supplying water to the water feeding channels;

a rotary member constructed such that the rotary member is raised along the supply channel, when water is supplied to the supply channel, and the rotary member is lowered along the supply channel, when the supply of water to the supply channel is interrupted, the rotary member having an opening communicating with a part of the water feeding channels when the rotary member is raised; and

a guide disposed below the rotary member, the guide being provided at the surface where the supply channel is formed, such that the flow of water is not disturbed, for guiding the rotary member such that the rotary member can be lowered while rotating.

25. The dish washer according to claim 24, wherein the rotary member includes:

a disc having an opening, and

at least one lower protrusion formed along the circumference of the disc such that the at least one upper protrusion comes into surface contact with the guide.

26. The dish washer according to claim 25, wherein the guide has a surface for guiding the lower protrusion.