KR20120134370A

KR20120134370A - Dishwahser and control method thereof

Info

Publication number: KR20120134370A
Application number: KR1020110053230A
Authority: KR
Inventors: 주병현; 정문기; 표준호
Original assignee: 엘지전자 주식회사
Priority date: 2011-06-02
Filing date: 2011-06-02
Publication date: 2012-12-12
Also published as: KR101821201B1

Abstract

PURPOSE: A dish washer and a control method thereof are provided to spray washing water to objects using third arm while rotating around a rotary shaft which is vertical to first and second arms. CONSTITUTION: A dish washer comprises a tub, an injecting arm(6), a sump, and a filter. The sump collects washing water sprayed from the injecting arm. The filter removes foreign matters in the washing water from the sump. The injecting arm comprises first and second arms(61,63). The first arm is rotationally placed inside the tub, and sprays the washing water to objects. The second arm is connected to reciprocate around a rotary shaft in a line with the first arm. The second arm is supplied with the washing water from the first arm, and injects the washing water to the filter.

Description

Dishwasher and its control method {DISHWAHSER and CONTROL METHOD THEREOF}

The present invention relates to a dishwasher.

A dishwasher is a device that cleans dirt, such as food residues, on dishware or cooking utensils (hereinafter referred to as 'to be cleaned') using detergent and washing water.

A common dishwasher includes a tub providing a washing space, a rack provided in the tub to accommodate a washing object, a spray arm spraying the washing water into the rack, a sump storing the washing water, and a washing water stored in the sump. It is common to include a supply channel for feeding sandstone.

The dishwasher having the above-described configuration sprays the washing water onto the washing object accommodated in the rack according to the washing course selected by the user to remove the dirt from the washing object, and the washing object having been removed can be dried by hot air.

The present invention is to solve the problem to provide a dish washing machine with improved washing power.

In addition, the present invention is to solve the problem to provide a dishwasher having a spray arm capable of washing the filter provided for washing water filtration.

In addition, the present invention is rotated based on the axis of rotation parallel to the longitudinal direction of the first arm connected to the supply passage and the second arm for spraying the washing water to the washing object, rotated around the axis of rotation perpendicular to the longitudinal direction of the first arm to wash An object of the present invention is to provide a dishwasher having a third arm that sprays washing water onto a subject.

The present invention, in order to solve the above-described problem, the tub is a washing object is accommodated, the injection arm for spraying the washing water to the washing object accommodated in the tub, the sump that the washing water sprayed from the injection arm is provided, the upper part of the sump And a filter for removing foreign substances from the washing water flowing into the sump, wherein the injection arm is rotatably provided in the tub to spray the washing water into the washing object, the first arm extending in the longitudinal direction of the first arm and the washing arm. The dishwasher includes a second arm coupled to the first arm to reciprocate within a range of a predetermined angle with respect to the side-by-side rotation axis, and receiving the washing water from the first arm and spraying the washing water to the filter.

The present invention is a tub that is accommodated in the washing object for solving the above-described problem, the tub is provided to be rotatable inside the first arm and spraying the washing water to the cleaning object based on the axis of rotation parallel to the longitudinal direction of the first arm A spray arm having a second arm coupled to the first arm to spray the wash water supplied from the first arm to the washing target so as to be reciprocally rotated within a predetermined angle range, and the wash water sprayed from the spray arm is collected. And a sump, wherein the first arm includes a second arm insert for supplying the wash water to the second arm, and the second arm includes a first arm connection portion for receiving the second arm insert. Between the first arm connecting portion and the second arm inserting portion provides a dishwasher having a flow path for discharging a portion of the washing water inside the second arm to the outside of the first arm and the second arm.

The present invention is a tub for cleaning the object is accommodated for solving the above problems, the first arm is provided to be rotatable inside the tub and the first arm to spray the washing water to the cleaning object and the reciprocating rotation within a predetermined angle range An injection arm having a second arm coupled to the arm and spraying the washing water supplied from the first arm to the cleaning target; a supply pump for supplying the washing water to the injection arm; and a main gear provided at the first arm; In the control method of the dishwasher including a driven gear meshed with the main gear, the connecting arm connecting the driven gear and the second arm to the reciprocating rotation of the second arm, driving the supply pump through the injection arm The washing step of spraying the washing water to the washing target, the washing step is carried out during the progress of the washing step, but the phase higher than the target RPM of the feed pump set in the washing step It provides a control method of a dishwasher including the RPM exceeds the maintenance phase for driving the feed pump.

In this case, the excess RPM maintenance step may be performed for a predetermined time, but may be started after a predetermined time from the start of the washing step or the start of the washing step.

The present invention can achieve the effect of providing a dish washing machine with improved washing power.

In addition, the present invention can achieve the effect of providing a dishwasher having a spray arm capable of washing the filter provided for washing water filtration.

In addition, the present invention is rotated based on the axis of rotation parallel to the longitudinal direction of the first arm connected to the supply passage and the second arm for spraying the washing water to the washing object, rotated around the axis of rotation perpendicular to the longitudinal direction of the first arm to wash The effect of providing the dishwasher provided with the 3rd arm which sprays wash water to a subject can be aimed at.

1 is a structural diagram of a dish washer according to the present invention.
2 is a structural diagram of an injection arm provided in the present invention.
3 is a view showing a coupling structure of the first arm and the second arm provided in the present invention.
Figure 4 is a graph showing a feed pump RPM control process provided in the present invention.

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

Unless defined otherwise, all terms herein are the same as the general meaning of the term as understood by one of ordinary skill in the art to which this invention belongs, and if the terms used herein conflict with the general meaning of the term Are as defined herein.

On the other hand, the configuration or control method of the device to be described below is not intended to limit the scope of the present invention, but to describe the embodiment of the present invention, the same reference numerals are used throughout the specification the same components Indicates.

1 is a structural view of a dishwasher according to the present invention, the dishwasher 100 of the present invention includes a cabinet 1 forming an exterior, a tub 2 provided inside the cabinet to provide a washing space, and provided inside the tub. And a rack (5) capable of storing objects to be washed, such as dishes, and an injection arm (6) for spraying the washing water onto the objects to be washed in the rack.

The cabinet 1 is provided with a door 11 capable of withdrawing and storing a washing object from the rack, and the door 11 may be provided with a control panel 13 for controlling the operation of the dish washer by the user. have.

Inside the tub 2, a supporter 21 for supporting the rack 5 is provided along the longitudinal direction of the tub, and the rack 5 is provided with a wheel 51 supported by the supporter. Can be. Thus, the rack 5 can be pulled out in front of the tub 2 when the door 11 is opened.

The injection arm 6 is provided inside the tub and sprays the washing water to the washing object stored in the rack.

The injection arm 6 may be provided to directly receive the washing water from a water supply source (not shown) provided outside of the dishwasher and to spray the washing water to the rack 5, as shown in FIG. 1. It may be provided to receive the washing water recovered in 3) and spray the washing water.

In the latter case, the dishwasher of the present invention is located at the lower part of the tub 2 to collect a washing water sprayed into the tub 3, a supply passage 8 for supplying the washing water recovered to the sump to the spray arm; It is preferred that the feed pump 7 is further provided.

The sump 3 receives wash water through a supply part 31 connected to a water source (not shown) provided outside of the dishwasher. The supply part 31 is provided as a supply hose for connecting the sump and the water source. Can be.

Meanwhile, the sump 3 may further include a drain hose 333 and a drain pump 331 for discharging the wash water stored in the sump 3 after the washing of the washing target is completed.

The supply channel 8 is a channel through which the wash water stored in the sump may move to the injection arm 6, and the supply pump 7 supplies the wash water stored in the sump 3 through the supply channel 8. Supply to the injection arm (6).

Therefore, when the user operates the dishwasher, clean washing water is supplied to the sump through the supply part 31, and when a predetermined amount of washing water is supplied to the sump, the supply pump 7 supplies the washing water stored in the sump into the supply passage 8. Supplying to the injection arm (6) through, the washing water supplied to the injection arm is sprayed to the washing object accommodated in the rack is possible to wash the washing object.

On the other hand, in the structure of re-supplying the washing water recovered to the sump (3) after spraying the washing object to the injection arm (6) it is necessary to remove the foreign matter contained in the washing water recovered to the sump.

Since the washing water sprayed from the spraying arm 6 moves to the sump after removing the foreign matter remaining on the surface of the washing target, when the washing water is supplied to the spraying arm 6 without removing the foreign matter mixed in the washing water stored in the sump Foreign matter mixed with the wash water may cause a malfunction of the supply pump 7 or a malfunction of the injection arm 6.

Therefore, it is necessary to further provide a device for removing the foreign matter contained in the wash water recovered to the sump, the dishwasher 100 of the present invention wash water in the sump cover 35 for separating the tub (2) and the sump (3) It may further include a filter (4) for filtering the foreign matter contained in.

The sump cover 35 distinguishes a washing space provided by the tub from a collecting space provided by the sump, and is provided at an upper portion (or a lower portion of the tub) of the sump 3.

In this case, the filter 4 may be provided only with the auxiliary filter 43 provided in the form of a plurality of holes or meshes passing through the sump cover 35, and the main filter 41 provided to be detachable from the sump cover. ) May be provided only, or may include both an auxiliary filter and a main filter.

Hereinafter, the description will be made based on a case in which both the main filter and the auxiliary filter are included for convenience of description.

The main filter 41 includes a first filter 413 detachably attached to the sump cover 35, a second filter 413 inserted into the first filter, and wash water remaining in the sump cover. It may be provided to include a filter inlet 415 flowing into the filter 41.

The first filter and the second filter is provided in a mesh form, but the size of the hole provided in the first filter 411 is preferably larger than the size of the hole provided in the second filter 413.

This is to filter the washing water more effectively by filtering only the relatively large foreign matter through the first filter 411 and filtering the relatively small foreign matter passing through the first filter through the second filter 413. .

Therefore, when the user wants to clean the main filter 41, the user can separate the main filter 41 from the sump cover 35 to clean the first filter and the second filter.

On the other hand, the auxiliary filter 43 is a filter provided in case the main filter 41 is clogged by foreign matters and can not supply the washing water smoothly into the sump (3).

That is, the structure shown in FIG. 1 may be re-supplied to the injection arm 6 through the supply pump 7 only when the washing water sprayed to the object to be cleaned through the injection arm 3 is recovered to the sump through the main filter 41. . Therefore, when foreign matters accumulate on the main filter 41 and the washing water cannot be smoothly recovered into the sump, a problem may occur in that the washing water cannot be smoothly supplied to the injection arm.

Since the dishwasher 100 of the present invention is provided with the auxiliary filter 43 provided in the form of a plurality of holes or nets penetrating the sump cover 35, even if the main filter 41 is blocked by foreign matter, There is an effect that can be supplied smoothly.

On the other hand, the injection arm (6) provided in the dishwasher (100) of the present invention is provided to communicate with the supply passage (8), the first arm (61) that rotates inside the tub, the washing water supplied from the first arm to wash Spraying the washing water to the target may be provided to include a second arm (63) for reciprocating rotation within a predetermined angle range, the third arm to be rotatable to the first arm to spray the washing water to the cleaning target.

Hereinafter, the structure of the injection arm 6 will be described in detail with reference to FIG. 2.

The first arm 61 has a flow path connecting portion 611 which is rotatably coupled to the supply flow path 8, a chamber 613 (see FIG. 3) through which the wash water flowing into the flow path connecting portion flows, and flowed into the chamber. A first arm injection hole 615 for spraying the washing water to the object to be cleaned.

The first arm 61 may be provided to rotate through a separate driving means such as a motor, but FIG. 2 illustrates a structure in which the first arm rotates through the first arm injection hole 615 provided in the first arm. It is shown.

That is, the first arm injection hole 615 is preferably provided to penetrate the upper surface of the chamber 613, the washing water is preferably provided so as to be inclined at a predetermined angle with respect to the upper surface of the first arm.

This is to allow the first arm 61 to rotate by the repulsive force when the washing water is injected through the first arm injection hole 615.

For example, when the longitudinal direction of the first arm is defined as the Y axis, and the directions perpendicular to the Y axis are defined as the X axis and the Z axis, the first arm injection hole 615 has washing water in the XZ plane. It may be provided to be inclined at a predetermined angle with respect to.

As shown in FIG. 2, when the first arm injection hole 615 is provided only on the right side of the flow path connecting portion 611, the directions of the washing water sprayed from the plurality of first arm injection holes should be identical.

Meanwhile, unlike FIG. 2, when the first arm injection hole 615 is provided on both the left and right sides of the flow path connecting portion 611, the first arm injection hole and the right side of the flow path connecting portion are provided on the left side of the flow path connecting portion. The injection direction of the first arm injection hole provided in the to be provided to be different from each other.

The second arm 63 is provided to improve the washing efficiency of the dishwasher. The second arm 63 receives the washing water from the first arm 61 and washes the washing water contained in the rack 5. Spraying is provided on the basis of the first arm (with respect to the axis of rotation parallel to the longitudinal direction of the first arm) is provided to reciprocate within a predetermined angle range.

When defining the longitudinal direction of the first arm as the Y axis, the second arm reciprocates within a predetermined angle range A with the Y axis as the rotation axis. In this case, the trajectory of the wash water sprayed from the second arm will be located in the X-Z plane.

Therefore, the second arm 63 can effectively remove foreign substances remaining on the surface of the cleaning object by spraying the washing water at various angles to the cleaning object stored in the rack.

To this end, the second arm is provided to be rotatable on the side of the first arm (to be rotated about an axis of rotation parallel to the longitudinal direction of the first arm at one end of the first arm), the second arm drive unit 65 It may be provided to receive the power of the reciprocating rotation by.

Hereinafter, the coupling structure of the first arm and the second arm and the structure of the second arm driver 65 will be described with reference to FIGS. 3 and 2 (b).

As shown in FIG. 3, the first arm 61 and the second arm 63 may be coupled by inserting one end of the first arm into the second arm.

To this end, the first arm 61 further includes a second arm insertion part 617 provided at one end of the chamber 613, and the second arm 63 includes a first arm in which the second arm insertion part is accommodated. It is preferable that the connection part 631 is further provided.

In this case, the second arm driving unit 65 may be provided in various forms as long as the second arm can reciprocally rotate within a predetermined angle range about a rotation axis parallel to the longitudinal direction of the first arm. 2 illustrates an example in which the second arm reciprocates through the main gear 651, the driven gear 653, and the connecting bar 657.

The main gear 651 is provided in the flow path connecting portion 611 of the first arm to be rotated together when the first arm is rotated, the driven gear 653 is fixed to the main shaft gear 651 to engage with ( 6531) is provided on the first arm, the connecting bar 655 is supported by the support shaft 657 provided on the first arm and one end of the connecting bar is coupled to the driven gear and the other end of the connecting bar It is coupled to the bar connecting shaft 637 provided on the second arm.

Since the first arm 61 is rotatably provided in the supply passage 8 through the flow path connecting portion 611, when the supply pump 7 supplies the washing water stored in the sump 3 to the supply passage 8, the first arm 61 may be rotated. Arm 61 is rotated.

When the first arm rotates, the main gear 651 provided in the flow path connecting portion 611 rotates, and the driven gear 653 engaged with the main gear also rotates about the fixed shaft 6531.

When the driven gear rotates, one end of the connecting bar 655 fixed to the driven gear moves in a circular trajectory, but since the connecting bar 655 is supported by the support shaft 657, the other end of the connecting bar reciprocates within a predetermined angle range. You exercise.

That is, referring to FIG. 2 (c), the trajectory of one end of the connecting bar 655 coupled to the driven gear forms a circular trajectory C1, but the connection bar is fixed to be rotatable by the support shaft 657. The other end of the bar will form a reciprocating trajectory C2.

In order to implement the reciprocating movement trace C2 shown in FIG. 2 (c), the connecting bar 655 has the support shaft 657 inserted therein, and the connecting bar slit 6571 and the bar connecting shaft have a predetermined length. Preferably, it is inserted to include a connecting shaft slit (6553) having a predetermined length.

In this case, the connecting bar slit (6551) and the connecting shaft slit (6553) should be provided in consideration of the position change (B1, B2) of the connecting shaft while one end of the connecting bar 655 is moving while drawing the circular trajectory (C1). do.

On the other hand, since the second arm is inserted into the first arm connecting portion 631 so that the second arm inserting portion 617 of the first arm is rotatable, when the other end of the connecting bar reciprocates along the track C2, the second arm is The reciprocating rotation is performed within a predetermined angle range with respect to the rotation axis parallel to the longitudinal direction of the first arm.

Therefore, the washing water introduced into the second arm from the first arm is sprayed to the washing object through the second arm injection hole 633 provided in the second arm, but within a predetermined angle range according to the reciprocating angle of the second arm. The dishwasher of the present invention can increase the washing efficiency because the path is sprayed on the washing object.

Meanwhile, the second arm 63 may further include a filter washing hole 635 through which washing water is sprayed for washing the filter 4 positioned below the spray arm.

When the injection arm 6 is provided below the rack 5, and the filter 4 is provided below the injection arm, the second arm injection hole 633 is provided on the upper surface of the second arm. Preferably, the filter washing hole 635 is provided on the lower surface of the second arm.

Therefore, when the washing water supplied from the first arm flows into the second arm, a part of the washing water is injected into the washing object accommodated in the rack 5 through the second arm injection hole 633, and among the washing water introduced into the second arm. Some are sprayed toward the filter 4 through the filter washing hole 635.

As shown in FIG. 2 (a), since the first arm 61 rotates by the repelling force of the washing water sprayed from the first arm injection hole 615, the second arm provided in the first arm also rotates the first arm. Will rotate inside the tub along.

At this time, the second arm is reciprocated in a predetermined angle range (A) at one end of the first arm by the second arm drive part 65, and thus discharged from the second arm injection hole 633 and the filter washing hole 635. The washing water is sprayed with a different spraying direction within a predetermined angle range.

The filter injection hole 635 may be provided to spray the washing water to the main filter 41 and the auxiliary filter 43, but FIG. 2 (a) shows a structure in which the washing water is sprayed to the auxiliary filter 43 intensively. will be.

When the filter injection hole 635 is provided in the second arm, the washing water sprayed from the filter injection hole varies in the spray direction within a predetermined angle range, thereby allowing the washing of a wider area of the auxiliary filter 43.

Assuming that the filter injection hole is provided in the second arm that does not reciprocate within the predetermined angle range A, the washing water sprayed from the filter injection hole will form a circular trajectory D having one radius. However, when the filter injection hole 635 is provided in the second arm reciprocating within a predetermined angle range, the washing water sprayed from the filter injection hole forms a circular locus (wash band, E) having two radii of different sizes. The secondary filter 43 can be washed more effectively.

On the other hand, the injection arm (6) provided in the dishwasher of the present invention may further include a third arm (67) provided to be supplied to the washing water from the first arm and to be sprayed on the washing object to be rotatable to the first arm. .

The third arm 67 communicates with the chamber 613 (see FIG. 3) of the first arm through the first arm connection part 671 and is rotatably provided through the first arm connection part 671.

In addition, the upper surface of the third arm is provided with a third arm injection hole (673) for spraying the washing water flowing into the first arm connection portion to the object to be washed.

When defining the longitudinal direction of the third arm to the Y axis, the third arm injection hole 673 is preferably provided so that the washing water is inclined at a predetermined angle with respect to the X axis in the X-Z plane.

This is to allow the third arm 67 to rotate by the repulsive force when the washing water is injected through the third arm injection hole 673.

Meanwhile, foreign matter may remain in the coupling space between the second arm insertion part 617 of the first arm and the first arm connection part 631 of the second arm, but the dishwasher of the present invention may include the second arm insertion part and the first arm. It may be provided to further include a flow path for the discharge of the foreign matter remaining in the coupling space of the connection portion and the discharge of foreign matter introduced into the second arm.

Referring to FIG. 3, the flow path 618 may be provided along the longitudinal direction of the outer circumferential surface of the second arm insertion part 617.

When a plurality of coupling protrusions 619 are provided on the outer circumferential surface of the second arm insertion portion 617 to prevent the second arm from being separated from the first arm, the coupling protrusion 619 may include a second arm insertion portion ( 617 may be provided to be spaced apart a predetermined distance along the circumferential direction, in this case, the flow path 618 may be defined as a space formed between one engaging projection and the other engaging projection.

Therefore, when the washing water is introduced into the second arm, some of the washing water is sprayed to the washing object through the second arm spray hole 633, and some of the washing water is directed toward the filter 4 through the filter washing hole 635. Some of the washing water is sprayed and discharged to the outside of the second arm through the flow path 618.

If foreign matter exists between the second arm insertion part 617 and the first arm connection part 631, the foreign body will be discharged to the outside of the second arm by the washing water flowing through the flow path 618. The foreign matter may be discharged to the outside of the second arm through the flow path 618.

On the other hand, the flow path 618 may be provided to include an upper flow path (6181) positioned on the upper portion of the second arm insert portion 617 and a lower flow path (6183) located under the second arm insert portion.

In this case, it is preferable that the width of the lower flow path 6183 is larger than the width of the upper flow path 6181. This is because foreign matter introduced into the second arm will move toward the bottom of the second arm by its own weight, thereby widening the width of the lower flow path 6183 so that foreign matter introduced into the second arm is easier to the outside of the second arm. To be discharged.

When the flow path 618 is defined as a separation space between one coupling protrusion and the other coupling protrusion, the separation distance of the coupling protrusion located on the upper portion of the second arm insertion portion 617 is the coupling protrusion located on the lower portion of the second arm insertion portion. It should be provided shorter than the separation distance of.

Furthermore, the washing water discharged through the flow path 618 may be provided to be sprayed in the direction of the second arm driver 65. This is to prevent the malfunction of the second arm 65 by washing the foreign matter remaining in the second arm drive unit 65 by using the wash water discharged to the flow path (618).

Hereinafter, a control method of the dish washing machine for reciprocating the second arm provided in the first arm through the second arm driving unit will be described.

Since the second arm driver 65 transmits power to the second arm 63 through a gear, a large amount of power is required for the reciprocating rotation of the first arm of the dishwasher. If remaining, more power is needed.

Therefore, the present invention is carried out during the washing step, the washing step of injecting the washing water to the cleaning target through the injection arm (6) by driving the supply pump (7) but higher than the target RPM of the supply pump set in the washing step Provided is a control method of a dishwasher including an excess RPM maintaining step of driving the supply pump at RPM.

Referring to FIG. 4, the target RPM is defined as an RPM (normal RPM) to be maintained by the supply pump 7 during the washing step, and the excess RPM holding step is performed for a predetermined time while the washing step is performed. It is a step starting after a predetermined time from the start time or the start time of the washing step.

That is, the above-described control method supplies a high pressure washing water to the first arm by rotating the feed pump at a higher RPM than the target RPM after a predetermined time has elapsed after the start of the washing step (or at the same time as the start of the washing step).

If the pressure of the washing water supplied to the first arm is high, the rotational force of the first arm is increased, and if the rotational force of the first arm is increased, the force transmitted to the driven gear 653 through the main gear 651 increases, so the second arm is increased. It can provide the initial driving force required for the reciprocating rotation of.

The present invention may be practiced in various forms and is not limited to the above-described embodiment. Accordingly, 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.

Dishwasher: 100 Cabinets: 1 Doors: 11
Control Panel: 13 Tub: 2 Sump: 3
Sump cover: 35 Filter: 4 Main filter: 41
Secondary filter: 43 Racks: 5 Shot arms: 6
1st arm: 61 2nd arm: 63 2nd arm drive part: 65
Third arm: 67 Supply pump: 7 Supply channel: 8

Claims

Tub to be cleaned;
An injection arm spraying the washing water onto the washing object accommodated in the tub;
A sump for collecting wash water sprayed from the spray arm;
And a filter provided at an upper portion of the sump to remove foreign substances from the washing water flowing into the sump.
The injection arm
A first arm rotatably provided inside the tub to spray washing water to the washing target;
A second arm coupled to the first arm to reciprocate within a predetermined angle range with respect to the axis of rotation parallel to the longitudinal direction of the first arm, and receiving washing water from the first arm and spraying the washing water to the filter; Dishwasher comprising a.

The method of claim 1,
A supply passage communicating with the sump and the first arm, wherein the first arm is rotatably fixed;
And a supply pump for supplying the washing water stored in the sump to the first arm through the supply passage.

The method of claim 2,
A main gear provided in the first arm to rotate together when the first arm rotates;
A driven gear provided on the first arm and engaged with the main gear;
One end is connected to the driven gear and the other end is connected to the second arm;
And a support shaft provided on the first arm to support the connection bar.

The method of claim 3,
The first arm further includes a first arm injection hole in which the washing water is sprayed toward the washing target direction, wherein the first arm injection hole is rotatably provided by the repulsive force of the washing water sprayed. Dishwasher.

The method of claim 3,
The second arm is
And a second arm spray hole for spraying the washing water to the washing object, and a filter washing hole for spraying the washing water to the filter.

The method of claim 5,
The sump further includes a sump cover provided on a bottom surface of the tub to distinguish the tub from the sump.
The filter is provided to be detachable to the sump cover, the tableware characterized in that it comprises a main filter for removing foreign matter from the washing water flowing into the sump, and an auxiliary filter provided with a plurality of holes through the sump cover syringe.

The method according to claim 6,
The filter washing hole is a dishwasher, characterized in that provided to spray the washing water to the auxiliary filter.

The method of claim 1,
The injection arm
Further comprising a third arm receiving the washing water from the first arm and spraying the washing object,
The third arm is a dish washer, characterized in that rotated based on the axis of rotation perpendicular to the longitudinal direction of the first arm.

Tub to be cleaned;
A first arm rotatably provided in the tub and coupled to the first arm to reciprocally rotate within a predetermined angle range based on a rotation axis parallel to a longitudinal direction of the first arm to spray washing water to the washing object; An injection arm provided with a second arm for spraying the washing water supplied from the first arm to the cleaning target;
And a sump for collecting wash water sprayed from the spray arm.
The first arm includes a second arm insert for supplying the wash water to the second arm, the second arm includes a first arm connecting portion for receiving the second arm insert,
And a flow path between the first arm connection part and the second arm insertion part, in which a part of the washing water inside the second arm is discharged to the outside of the first arm and the second arm.

10. The method of claim 9,
The second arm insertion portion further includes a plurality of coupling protrusions protruding from an outer circumferential surface of the second arm insertion portion to contact the inner circumferential surface of the first arm connection portion, wherein the plurality of coupling protrusions are formed along the outer circumferential surface of the second arm insertion portion. It is provided spaced a predetermined distance,
The flow path is a dish washer, characterized in that provided in the spaced space between the coupling projection and the other coupling projection.

The method of claim 10,
The width of the flow path provided in the lower end of the second arm insert portion is greater than the width of the flow path provided in the upper end of the second arm insert portion.

10. The method of claim 9,
A supply passage communicating with the sump and the first arm, wherein the first arm is rotatably fixed;
And a supply pump for supplying the washing water stored in the sump to the first arm through the supply passage.

The method of claim 12,
The sump further includes a sump cover provided on an upper portion of the sump to distinguish the tub and the sump.
The filter is dishwasher, characterized in that provided with a plurality of holes through the sump cover.

The method of claim 13,
The second arm is the dishwasher further comprises a; filter washing hole for receiving the washing water from the first arm to spray the washing water to the filter.

The method of claim 12,
Further comprising a second arm driving unit for rotating the second arm, the second arm driving unit
A main gear provided in the first arm to rotate together when the first arm rotates;
A driven gear provided on the first arm and engaged with the main gear;
One end is connected to the driven gear and the other end is connected to the second arm;
And a support shaft provided on the first arm to support the connection bar.

16. The method of claim 15,
The washing machine discharged through the flow path is sprayed in the direction of the second arm drive unit.

9. The method of claim 8,
The injection arm
Further comprising a third arm receiving the washing water from the first arm and spraying the washing object,
The third arm is a dish washer, characterized in that rotated based on the axis of rotation perpendicular to the longitudinal direction of the first arm.

Tub that is to be cleaned object, is provided to be rotatable inside the tub is coupled to the first arm to be reciprocating rotation within a predetermined angle and the first arm for spraying the washing water to the cleaning object supplied from the first arm An injection arm provided with a second arm for spraying the washing water to the object to be cleaned, a supply pump for supplying the washing water to the injection arm, a main gear provided in the first arm, and a driven gear engaged with the main gear, In the control method of the dishwasher comprising a connecting bar connecting the driven gear and the second arm so that the two arms reciprocate,
A washing step of driving the supply pump to spray the washing water to the washing target through the spraying arm;
And an excess RPM maintaining step of driving the supply pump at a higher RPM than a target RPM of the supply pump set in the washing step, while the washing step is in progress.

19. The method of claim 18,
The excess RPM maintenance step is performed for a predetermined time
Control method of the dishwasher, characterized in that it is started after a predetermined time from the start of the washing step or the start of the washing step.