KR101025495B1 - The flow path conversion pump - Google Patents

Abstract

PURPOSE: A flowing path converting pump for a washing machine which improved a operation performance are provided to form a non-spiral part to both shaft end parts by always coupling a corresponding spiral part to the spiral part in a flowing converting body. CONSTITUTION: A driving motor(20) has a driving shaft(21). The driving shaft is arranged on the flow path. A first and a second impellers(30A,30B) are respectively fixed to both end parts of the driving shaft. A spiral part(40) is arranged between the first and the second impellers in the stop part. A flow path converting body(50) has a correspondent spiral part(51) for coupling with a threaded section. The flow path converting body performs forward and backward motion in a length direction of the driving shaft by a forward and backward motion of the driving shaft.

Description

Euro-conversion pump for washing machine with improved operating performance {THE FLOW PATH CONVERSION PUMP}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow path switching pump for a washing machine used for draining or circulating a wash water in a laundry tub, and in particular, a shaft which is rotated by a drive shaft rotational force of a drive motor, and a corresponding spiral fastened to a spiral portion thereof. In the flow path switching body having a portion configured to maintain the spiral portion and the corresponding spiral portion at all times during the advancing operation for switching the flow path of the flow path switching body,

In addition, by configuring a separate shaft having a spiral portion is inserted and fixed to the drive shaft of the drive motor, relates to a flow path switching pump for a washing machine that provides improved operation performance and ease of manufacture.

As a technology related to a flow path conversion pump installed in a washing machine for washing and dewatering laundry in a laundry tub rotated by electric power, to drain or circulate the laundry in the laundry tub,

Korea Utility Model Registration No. 20-0447221 (registered as of Dec. 29, 2009, hereinafter referred to as 'advanced technology') `` Euro flow conversion pump for washing machine '' is presented,

The prior art is provided with a suction inlet, a drain and a circulation port, the housing body is formed with a flow path for water flow therein, is disposed on the flow path of the housing body is connected to the rotating shaft of the motor is installed to rotate, the center of the outer peripheral surface A first impeller and a second impeller disposed on the flow path of the housing body facing the drain hole and the circulation hole and inserted into and fastened to the shaft, and having a flow path forming hole; It is installed between the first impeller and the second impeller, the insertion screw is disposed on the shaft and has a corresponding screw thread coupled to the thread of the shaft on the hollow inner surface, and rotates in left and right directions according to the forward and reverse rotation of the motor for use in flow path switching. The present invention relates to a flow path switching pump for a washing machine comprising a flow path moving body.

When the flow path switching body which has a corresponding spiral part connected to the spiral part of the drive shaft and converts the flow path by linear motion by the rotational force of the drive shaft is plugged into the impeller of one of the impellers on both sides, the spiral part and the corresponding spiral part are released from each other. A, it is moved to the other impeller side by the rotational force of the opposite direction of the drive shaft, in this case, the mutual fastening operation of the spiral portion and the corresponding spiral portion may occur.

In order to solve this problem, the prior art provides guide locking grooves in the flow path switching body and guide locking projections in the impeller, respectively, as shown in FIG. At the same time, when the flow switching body is moved from one side to the other side, the screw and the corresponding screw thread can be easily interlocked for the first time. However, the scrubber may be worn or damaged by an adsorbent removal operation and a fastening movement with the spiral part. There may be a problem that can cause the shape deformation can not function properly.

In addition, the prior art has formed a screw thread throughout the shaft of the motor as shown in Figure 5 of the publication, which causes a waste of manufacturing costs, there is a problem that the area where various foreign matters can be fixed adsorption fixed.

In addition, a screw thread is formed on the shaft of the motor (corresponding to the drive shaft of the present invention), and there is a difficulty in fabricating and manufacturing the screw thread with accuracy such as pitch and height.

In addition, foreign matter may be introduced into the mutually fastening site of the screw thread formed in the shaft of the motor and the corresponding screw thread of the flow path converting body, and the foreign material introduced into the fastening site may be absorbed and solidified. The scrubber may be easily worn or damaged, and in particular, there is a problem in that there is no configuration for preventing the inflow of foreign substances in advance.

In addition, the watertightness between the impeller and the flow path switching body plugged in there is a problem that the wash water can leak to the impeller side blocked by the flow path switching body,

In addition, there is a problem that the initial drive for the linear motion of the flow path conversion body when the shaft of the motor is not properly made,

In addition, there is a problem that abrasion or noise due to the impact of the flow path switching body and the impeller to move to both sides impeller contact.

In order to solve the above-mentioned problems, the flow path switching pump for a washing machine with improved operating performance according to the present invention,

A housing including an inlet, a first and a second outlet, the housing having a flow path for the flow of fluid therein;

A drive motor having a drive shaft disposed on the flow path of the housing;

First and second impellers fixedly coupled to both ends of the drive shaft and disposed at the first and second outlet sides, respectively;

A spiral portion arranged in the middle portion of the drive shaft, the middle portion being an area between the first and second impellers; And

It has a corresponding spiral portion for fastening with the spiral portion, and moves forward and backward in the longitudinal direction of the drive shaft by forward rotation or reverse rotation of the drive shaft, thereby in charge of opening and closing the flow path to the first and second outlet sides. Flow path conversion made;

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The driving shaft of the drive motor is a non-helical portion is arranged on both sides of the spiral portion,

The corresponding spiral portion is positioned on the spiral portion and the non-helical portion when the flow path switching member blocks the flow path to the first or second outlet side.

And the shaft is inserted and fixed to the drive shaft of the drive motor,

The spiral portion is formed with the spiral portion,

The non-helical portions are arranged at both ends of the shaft corresponding to both sides of the spiral portion.

The first and second impellers each have a neck portion having a tapered engaging portion on an opposite side thereof,

The flow path converting body has a corresponding catching portion with the catching portion at both ends, and a plug portion plugged in to surround the neck portion is formed.

And the flow path switching member is characterized in that the sealing member for preventing the introduction of foreign matter to the fastening portion of the spiral portion and the corresponding spiral portion at both ends.

On the other hand, the flow path switching member that blocks the flow path to the first or second outlet is the right end or left end, or both of which face the branch point from the flow path of the housing to the first and second outlet It is characterized in that a plurality of projections are arranged radially on the outer circumferential surface.

At this time, the projections are formed on the outer circumferential surface of both the right end and the left end of the flow path conversion body,

The protrusion at the right end and the protrusion at the left end are formed to be separated from each other.

On the other hand, the flow path switching member is characterized in that the buffer member is provided on the contact surface with the first or second impeller.

The flow path switching pump for a washing machine with improved operating performance according to the present invention,

First, by forming a non-helical portion at both ends of the shaft while allowing the corresponding spiral portion to always be fastened without deviating from the spiral portion in the flow path switching body plugged with both impeller sides in the spiral portion of the shaft and the corresponding spiral portion of the flow path switching body. In addition, there is an effect that can be expected to improve the operating performance and ease of manufacture.

Second, by injection molding the shaft having a separate spiral portion and insert and fix it to the drive shaft, it is possible to more easily prepare the spiral portion and there is an effect that the shaft is easy to replace.

Third, by providing a sealing member at both ends of the flow path switching body, there is an effect that can prevent inflow of foreign matter to the mutual coupling portion between the spiral portion of the shaft and the corresponding spiral portion of the flow path switching body.

Fourth, by improving the structure of the neck of the impeller, the plug of the flow path switching body, and each of the locking parts and the corresponding catching part, the effect of preventing the water leakage to the impeller side blocked by the flow path switching body. There is.

Fifth, by providing a plurality of protrusions on the outer circumferential surface of the flow path switching body, there is an effect that can be more easily induced linear movement of the flow path switching body as the resistance of the wash water acts.

Sixth, by providing a cushioning member on the contact surface between the impeller and the flow path switching body plugged therein, there is an effect that can prevent the impact and noise.

1 is an exploded three-dimensional block diagram showing a flow path conversion pump according to the present invention,
2 is a cross-sectional configuration diagram of FIG.
3a and 3b is a cross-sectional configuration of the operating state in FIG.
4 is an exploded three-dimensional block diagram showing a drive shaft, a shaft, and an impeller;
5 is an exploded three-dimensional block diagram showing that the corresponding catching portion and the catching portion are formed in each of the flow path switching body and the impeller;
6 is a partial cross-sectional view showing that the sealing member is provided in the flow path switching member;
7 is a three-dimensional configuration diagram showing the projections of the first and second embodiments formed in the flow path switching body,
8 is a cross-sectional configuration diagram showing a flow path switching pump to which the flow path switching member having the protrusion of the second embodiment is applied;
9 is a three-dimensional configuration showing that the buffer member is provided in the flow path switching member;
10 is a partial cross-sectional view showing that the buffer member is provided in the flow path switching member.

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

Prior to this, terms or words used in the present specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors properly define the concept of terms in order to explain their invention in the best way. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that it can. Therefore, the embodiments described in the specification and the configuration shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

Prior to the description, the first impeller side is defined as left or front and the second impeller side is specified as right or rear with reference to FIG. 1.

In addition, the inlet pipe side is determined as an upper side or an upper side based on FIG. 1, and the body side is specified as a lower side or a lower side.

As shown in Figure 1 to 10, the flow path switching pump for a washing machine with improved operating performance according to the present invention,

The housing 10, the driving motor 20, the first and second impellers 30A and 30B, the spiral portion 40, and the flow path switching body 50 are formed.

Looking at each configuration,

Housing 10 is

As shown in Figures 1 and 2,

It includes an inlet 111, the first and second outlets 112, 113, the flow path 114 for the flow of fluid is formed therein.

That is, the flow path 114 has a path capable of fluid flow from the inlet 111 to the first and second outlets 112 and 113.

Looking in more detail with respect to the housing 10,

It is open at both sides, and includes an inlet 11 through which the washing water is introduced into the upper part, a first outlet 112 through which the washing water is discharged into the upper left part, and a second outlet 113 through which the washing water is discharged into the lower right part. Body 11 formed with a flow path 114 for the flow of fluid therein,

First cover 12 for sealing the left side of the body 11, and

Second cover 13 for sealing the right side of the body 12

It is made, including.

At this time, the body 11 and the first cover 12, the body 11 and the second cover 13 is a sealing member (for example O-ring) for the water tightness is interposed (介 在) desirable.

And the housing 10 to provide a filtering function for filtering foreign matter of the incoming wash water,

As shown in FIGS. 1 and 2, the inlet pipe 14 having the filter member 141 built therein may be mounted at the inlet 111 of the body 11.

In addition, a cap 142 for replacing the filter member 141 may be further provided at the upper side of the inlet pipe 14.

Accordingly, the wash water introduced into the inlet pipe 14 is introduced into the inlet 111 of the body 11 through the filter member 141.

Drive motor 20 is

As shown in Figures 1 and 2,

Drive shaft 21 disposed on the flow path 114 of the housing 10

It is made, including.

At this time, the drive motor 20 is provided to be mounted on the first cover 12 side of the housing 10 in the present invention,

In the first cover 12 of the housing 10, a sealing member for watertightness is preferably interposed in a through portion through which the drive shaft 21 passes.

The first and second impellers 30A and 30B

As shown in Figures 1 and 2,

It is fixedly coupled to both ends of the drive shaft 21 and disposed on the first and second outlets 112 and 113 of the body 11, respectively, so that the drive shaft 21 is rotated together. The rotation is to discharge the washing water to each outlet side.

The first and second impellers 30A and 30B are formed with flow path discharge holes 31, respectively.

Spiral part 40

As shown in Figures 1 and 2,

In the drive shaft 21 of the drive motor 20 is arranged in the middle of the middle portion of the region between the first and second impeller (30A, 30B). More specifically, the spiral portion 40 is arranged at the middle portion of the shaft 60 to be described later.

The flow path converting body 50

As shown in FIGS. 1, 2, 3a, and 3b,

It has a corresponding spiral portion 51 for fastening with the spiral portion 40, by moving forward and backward in the longitudinal direction of the drive shaft 21 by the forward or reverse rotation of the drive shaft 21, In charge of opening and closing the flow path to the first and second outlets 112 and 113,

It has a cylindrical shape in which the corresponding spiral portion 51 is formed on the inner hollow inner circumferential surface to be fitted to the drive shaft 21.

At this time, in the flow path switching pump according to the present invention, the driving shaft 21 of the driving motor 20 has non-helical portions 40A arranged at both sides of the spiral portion 40.

The corresponding spiral portion 51 is formed on the spiral portion 40 and the non-helix portion 40A when the flow path switching member 50 blocks the flow path toward the first or second outlets 112 and 113. It is located at.

As a result, the flow path switching member 50 is in a state in which the corresponding spiral part 51 is always fastened without deviating from the spiral part 40 even when the flow path to the first and second outlets 112 and 113 is blocked. Will be maintained.

In other words, in the state where the flow path switching body 50 is plugged into both sides of the first or second impellers 30A and 30B, the corresponding spiral part 51 of the flow path switching body 50 is the spiral portion 40. The spiral portion 40 is arranged in the section that can be always coupled with.

Therefore, as in the prior art, it is possible to prevent an operation error, such as not being properly engaged in the operation to be mutually fastened by the rotational force of the drive shaft, the flow path switching body that is mutually released.

On the other hand, since there may be a manufacturing difficulty in forming the spiral portion 40 on the drive shaft 21 of the drive motor 20,

In the present invention, as shown in Figure 4,

Is provided with a shaft 60 that is inserted and fixed to the drive shaft 21 of the drive motor 20,

The spiral portion 40 is formed at the stop portion of the shaft 60,

As the non-helix portions 40A are arranged at both ends of the shaft 60 corresponding to both sides of the spiral portion 40,

The corresponding spiral portion 51 of the flow path switching member 50 is coupled to the spiral portion 40 formed on the shaft 60.

The shaft 60 is inserted into the drive shaft 21 in a form in which both ends thereof are fixed to the first and second impellers 30A and 30B, respectively.

To this end, the shaft 60 has a non-circular insertion portion 61 is formed at each of both ends, and the insertion portion 61 is fitted to each of the first and second impellers 30A, 30B. A non-circular correspondence insert 32 is formed.

Therefore, by forming the spiral portion 40 in the shaft 60 is provided separately, and configured to form the shaft 60 is fixed to the drive shaft 21, to overcome the difficulties of manufacturing and in particular of the spiral portion 40 When the replacement is required due to damage, it can be easily replaced.

On the other hand, in order to improve the stop operation and watertight performance of the flow path switching member 50 which is moved forward and backward by the forward or reverse rotation operation of the drive shaft 21 in the drive motor 20,

In the present invention, as shown in Figure 5 and 6,

Each of the first and second impellers 30A and 30B has a neck portion 33 having a tapered locking portion 331 on the opposite side thereof.

The flow path switching member 50 has a corresponding locking portion 521 with the locking portion 331 at each end portion and is formed with a plug portion 52 plugged in to surround the neck portion 33. .

In more detail, the neck portion 33 protruding from the first and second impeller (30A, 30B) facing each other is formed,

A tapered locking part 331 is formed at an end of the neck part 33,

Plug portions 52 having concave-type accommodation spaces 522 are formed at both ends of the flow path switching member 50,

The corresponding catching part 521 is formed at the bottom of the space part 522 of the plug part 52.

Therefore, when the flow path switching member 50 is moved toward the first or second impellers 30A, 30B by the rotation operation of the drive shaft 21, the locking portion 331 of the net portion 33 The corresponding catching portion 521 of the plug portion 52 is caught, thereby making a stop operation.

In this case, the plug portion 52 surrounds the neck portion 33, that is, the flow path is blocked as the neck portion 33 is plugged into the space portion 522 of the plug portion 52. The performance of preventing flow passage leakage to the impeller side is improved.

On the other hand, in order to prevent the inflow of foreign matter to the fastening portion of the spiral portion 40 and the corresponding spiral portion 51,

In the present invention, as shown in Figure 6,

Sealing members 70 are provided at both ends of the flow path switching member 50,

First, fitting portions 53 of an annular groove structure are formed at both ends of the flow path switching member 50.

The sealing member 70 is in contact with the corresponding fitting portion 71 of the annular protruding structure on the inner circumferential surface toward the non-helix portion 40A arranged on the shaft 60 to forcibly fit with the fitting portion 53. It consists of an adhesion part 72.

In this case, the close contact portion 72 is formed in a double structure in contact with the non-helix portion 40A so as to be spaced apart from each other, thereby preventing the inflow of foreign matters twice.

In addition, the sealing member 70 is preferably made of a material having excellent friction resistance.

On the other hand, for smooth movement of the flow path switching member 50 during the forward or reverse rotation of the drive shaft 21 of the drive motor 20,

The flow path switching member 50, which blocks the flow path to the first or second outlets 112 and 113, passes from the flow path 114 of the housing 10 to the first and second outlets 112 and 113. A plurality of projections 54 are arranged radially on the right end or left end facing the branch point 114a, or on the outer circumferential surface thereof.

In the present invention, the configuration of each of the protrusions 54 may be largely composed of the first and second embodiments.

As shown in [a] of FIG. 7, the protrusion 54 of the first embodiment

In the flow path switching body 50 is formed on the outer peripheral surface of both the right end and the left end.

At this time, the protrusions 54 formed at the right end and the left end form an interconnected form (integrated form), and thus are formed to be radially arranged in the longitudinal direction of the shaft 60 on the outer circumferential surface of the flow path switching member 50.

Therefore, the flow path switching member 50 that is stopped is smoothly retracted (straight) operation by the resistance of the wash water acting on the protrusion 54 during the forward or reverse rotation of the drive shaft 21.

As shown in [b] of FIG. 7, the protrusion 54 of the second embodiment

The flow path switching member 50 is formed to be separated from each other at the right end and the left end.

Here, the protrusion 54 at the right end and the protrusion 54 at the left end are alternately arranged.

At this time, the forward rotation of the drive shaft 21 of the drive motor 20 is set as a counterclockwise direction, the reverse rotation is set as a clockwise direction, and when the forward rotation of the drive shaft 21 is performed, the flow path switching member 50 has a left first impeller. When linearly moving toward the side of 30A, and when the driving shaft 21 is reversely rotated, when linearly moving toward the right second impeller 30B,

In the state where the flow path switching member 50 is located on the first impeller 30A side, the protrusion 54 at the right end facing the branch point 114a of the flow path 114 is in the forward rotation direction of the drive shaft 21. It has a form having a downward slope 541 in the opposite direction with respect to,

The projection 54 of the left end facing the branch point 114a of the flow passage 114 in the state where the flow path switching member 50 is located on the second impeller 30B side is in the reverse rotation direction of the drive shaft 21. It has a form having a downward slope 541 in the opposite direction with respect to.

For example, when the flow path switching member 50 is positioned on the first impeller 30A side, the resistance of the wash water acts on the protrusion 54 at the right end facing the branch point 114a of the flow path 114. The protrusion 54 at the left end that is non-facing with the branching point 114a of the flow passage 114 has a second impeller 30B because the resistance of the wash water is minimized by the inclined portion 541. Initial movement to the side can be made smoothly.

On the other hand, the shock and noise that may occur when the first or second impeller (30A, 30B) and the flow path switching member 50 is in contact with each other when the driving shaft 21 forward or reverse rotation of the drive motor 20 To prevent back,

In the present invention, as shown in Figure 9 and 10,

The flow path switching member 50 is provided with a buffer member 80 in contact with the first or second impeller (30A, 30B),

More specifically,

An insertion groove 521b is formed at the bottom of the space portion 522 of the plug portion 52, that is, the sliding surface 521a of the corresponding engaging portion 521 formed in the flow path switching member 50, and the insertion groove An interference fit buffer member 80 is inserted into 521b.

At this time, it is preferable that the buffer member 80 protrudes in a form in which a part is non-inserted from the insertion groove 521b,

In addition, the buffer member 80 is preferably made of an elastomer (elastomer) material.

Accordingly, the corresponding engaging portion 521 is stopped by the locking portion 331 of the flow path switching member 50 from the locking portion 331 of the neck portion 33 in the first or second impellers 30A and 30B. In this case, the shock absorbing member 80 provided on the sliding surface 521a of the corresponding engaging portion 521 in the plug portion 52 is the sliding portion 331 of the neck portion 33 sliding surface 331a. It absorbs the shock while contacting it.

Looking at the operating state of the flow path conversion pump for a washing machine with improved operating performance according to the present invention made up of the above configuration,

Washing water in the washing tub is drawn into the inlet pipe 14 of the housing 10,

The drawn wash water is filtered by the filter member 141 built in the inlet pipe 14,

The filtered wash water is introduced into the inlet 111 of the body 11 in the housing 10,

By the external control, the drive shaft 21 of the drive motor 20 is in the forward or reverse rotation operation,

As shown in FIGS. 3A and 3B, the flow path switching member 50 moves toward the first or second impellers 30A and 30B by the resistance of the shaft 60 and the washing water that rotate together with the drive shaft 21. Will be

The plug portion 52 of the flow path switching member 50 that is moved is plugged into the neck portion 33 of the first or second impellers 30A and 30B, and at the same time the locking portion 331 and the corresponding locking portion 521 By stopping the linear operation of the flow path switching member 50 by mutual locking,

It blocks the flow of the flow to one impeller side and opens the flow of the flow to the other impeller side.

On the other hand, one of the first or second outlets 112 and 113 of the body 11 in the housing 10 may be used for external discharge of the wash water, and the other may be used to circulate into the wash water. will be.

In the above description of the present invention with reference to the accompanying drawings, but with a specific shape and structure described with a "flow switching pump for the washing machine improved operation performance," the present invention can be variously modified and changed by those skilled in the art, such Modifications and variations are to be construed as falling within the protection scope of the present invention.

10: housing
11: body 111: entrance
112: exit 1 113: exit 2
114: Euro 114a: fork
12: first cover 13: second cover
14: inlet pipe 141: filter member
142: stopper
20: drive motor
21: drive shaft
30A: first impeller
30B: second impeller
31: Euro discharge hole 32: Corresponding insertion part
33: neck portion 331: hook portion
331a: sliding surface
40: spiral
40A: non-helix
50: Euro converting body
51 correspondence thread part 52 plug part
521: catching part 521a: sliding surface
521b: Insertion groove 522: space part
53: fitting part 54: protrusion
541: inclined portion
60: shaft
61: insertion unit
70: sealing member
71: corresponding fitting 72: close contact
80: buffer member

Claims (7)

A housing (10) comprising an inlet (111), first and second outlets (112, 113) and having a flow path (114) therein for flow of fluid therein;
A drive motor 20 having a drive shaft 21 disposed on the flow path 114 of the housing 10;
First and second impellers 30A and 30B fixedly coupled to both ends of the drive shaft 21 and disposed at the first and second outlets 112 and 113, respectively;
A spiral portion 40 arranged in the middle portion of the drive shaft 21, which is an area between the first and second impellers 30A and 30B; And
It has a corresponding spiral portion 51 for fastening with the spiral portion 40, and by moving forward and backward in the longitudinal direction of the drive shaft 21 by the forward or reverse rotation of the drive shaft 21, A flow path switching member 50 which is in charge of opening and closing the flow path to the first and second outlets 112 and 113;
Including but not limited to,

In the drive shaft 21 of the drive motor 20, non-helical portions 40A are arranged on both sides of the spiral portion 40, respectively.
The corresponding spiral portion 51 is formed on the spiral portion 40 and the non-helix portion 40A when the flow path switching member 50 blocks the flow path toward the first or second outlets 112 and 113. Will be located at
The flow path switching member 50, which blocks the flow path to the first or second outlets 112 and 113, passes from the flow path 114 of the housing 10 to the first and second outlets 112 and 113. A flow path switching pump for a washing machine with improved operating performance, characterized in that a plurality of projections 54 are arranged radially on the right end or left end facing the branch point 114a, or both of the outer peripheral surfaces thereof. .
The method of claim 1,
The shaft 60 is inserted and fixed to the drive shaft 21 of the drive motor 20,
The spiral portion 40 is formed at the stop portion of the shaft 60,
The non-spiral portion (40A) is arranged on both ends of the shaft (60) corresponding to both sides of the spiral portion (40), the operation performance improved washing machine flow switching pump.
The method of claim 1,
The first and second impellers 30A and 30B have neck portions 33 having tapered locking portions 331 on opposite sides, respectively.
The flow path switching member 50 has a corresponding catching portion 521 with the catching portion 331 at both ends, and is formed with a plug portion 52 plugged in to surround the neck portion 33. Washing flow path conversion pump for improved operation performance.
The method of claim 1,
The flow path switching member 50 is provided with a sealing member 70 for preventing the inflow of foreign matter to the fastening portion between the spiral portion 40 and the corresponding spiral portion 51 at both ends. Enhanced flow diversion pump for washing machine.
delete The method of claim 1,
Each of the protrusions 54 is formed on the outer circumferential surface of both the right end and the left end of the flow path switching member 50,
The flow path switching pump for a washing machine with improved operating performance, characterized in that the protrusion 54 of the right end and the protrusion 54 of the left end are formed to be separated from each other.
The method according to claim 1 or 2 or 3 or 4 or 6,
The flow path switching body 50 is a flow path switching pump for a washing machine, characterized in that the buffer member 80 is provided on the contact surface with the first or second impeller (30A, 30B).

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