KR102565954B1 - Washing machine - Google Patents

Abstract

The present invention, an outer tub provided inside the cabinet and storing wash water; an inner tub rotatably installed inside the outer tub and accommodating laundry therein; a tub base coupled to a lower end of the inner tub and having a wash water inlet hole and a communication hole along a height direction; a guide member coupled to a lower surface of the tub base and configured to communicate the wash water inlet hole and the communication hole from the outside of the tub base; and a duct mounted inside the inner tub, extending along a height direction of the inner tub, and configured to communicate with the guide member through the communication hole.

Description

Washing machine {WASHING MACHINE}

The present invention relates to a washing machine having a washing water ascending path.

In general, a top-loading washing machine refers to a washing machine in which an opening is formed at an upper portion of an inner tub assembly, and laundry is put in and taken out through the opening. The most common type of top loading washing machine is the pulsator type washing machine.

A pulsator-type washing machine washes laundry by emulsifying the wash water flow and detergent generated by forcibly flowing wash water by the rotation of the pulsator installed in the lower part of the inner tub assembly in a state in which laundry is put into the inner tub assembly. . The pulsator is rotated by a driving motor, and various types of water flow can be formed inside the washing tub through forward and reverse rotation.

On the other hand, in prior patent documents related to the present invention, it is rotatably installed at the lower part of the washing tub 1 to pump wash water remaining in the space between the washing tub 1 (also referred to as 'inner tub assembly') and the outer tub 2. The impeller 4 is disclosed. The wash water pumped by the impeller 4 rises through the water flow guide plate 7 and is supplied back into the washing tub through the pumping water discharge hole 70 .

In this way, as the wash water is pumped and sprayed on the laundry (also referred to as 'fabric') from the upper part of the inner tub assembly, the wash water can easily wet the fabric put into the inner tub assembly while using a small amount of wash water. A washing machine has been developed.

However, in the prior patent, since the water flow guide plate 7 mounted inside the washing tub 1 extends below the washing plate 3, there is a problem in that the inner lower structure of the washing tub 1 occupies a considerable volume. In addition, since the washing plate 3 is configured to move up and down, when the washing plate 3 is configured to be rotatable, interference with the water flow guide plate 7 may occur. To prevent the interference, the washing plate ( When 3) is manufactured in a smaller size, there is a problem in that the lower end of the water flow guide plate 7 is exposed or an additional cover for covering it is required.

In addition, as the pumping water discharge hole 70 is formed in the middle of the water flow guide plate 7, the effect of wetting is insignificant. had to bend a lot at the waist.

In addition, since the power transmission unit 6 is configured to reduce the rotational speed of the driving motor 5 and transmit the reduced rotational speed of the driving motor 5 to the impeller 4 for driving the washing plate 3, the pumping pressure by the impeller 4 is low and the water flow It is difficult to actually discharge wash water through the pumping water discharge hole 70 provided on the upper part of the guide plate 7 . The fact that the pumping water flow discharge hole 70 is formed in the middle of the water flow guide plate 7 in the invention disclosed in the prior patent literature can be said to be a design taking this point into consideration, and in fact, most of the washing is performed through the pumping water flow discharge hole 70. It will be said that the number is discharged.

In addition, the pumping water flow of wash water formed by the rotation of the impeller 4 has a direction corresponding to the direction of rotation of the impeller 4 . Accordingly, a considerable amount of washing water forms a vortex at the lower part of the water flow guide plate 7 and stays there or passes through it, so that a phenomenon may occur in which it is not introduced into the guide passage 700 .

Patent Publication No. 2003-0049818 (published on June 25, 2003)

A first object of the present invention is to provide a washing machine in which a flow path for increasing wash water pumped by blades is formed differently from conventional washing machines.

A second object of the present invention is to provide a washing machine in which the inner lower part of the inner tub assembly can be configured more simply.

A third object of the present invention is to provide a washing machine in which the wetting effect can be improved and a user can easily access a filter unit.

A fourth object of the present invention is to provide a washing machine with improved rotational force of a pulsator while allowing a larger amount of wash water to flow into an ascending passage of wash water.

In order to achieve the first object of the present invention, a tub base having a wash water inflow hole and a communication hole along the height direction is provided at the lower end of the inner tub, and a guide member is coupled to the bottom surface of the tub base to provide the tub base It is configured to communicate with the wash water inlet hole and the communication hole from the outside, and a duct configured to communicate with the guide member through the communication hole is mounted inside the inner tub to control the height direction of the inner tub. It can be formed by extension.

In order to achieve the second object of the present invention, the tub base includes a first part and a second part stepped upwardly outwardly with respect to the first part, a blade is accommodated in the first part, and the second part A fixed jig and a pulsator can be accommodated in the part.

In order to achieve the third object of the present invention, a filter unit for discharging foreign matter-filtered wash water into the inner tub is mounted on the top of the duct, and the filter unit is disposed adjacent to the top of the inner tub. It can be.

In order to achieve the fourth object of the present invention, a pulsator is provided on the tub base to form a wash water flow when rotating, and a blade to form a pumping water flow that moves wash water to the wash water inlet hole when rotated is the pulsator It is provided on the lower part of, and a planetary gear module for adjusting the rotation ratio of the pulsator with respect to the blade may be provided between the pulsator and the blade.

In addition, a guide member may be coupled to a lower surface of the tub base, and the guide member may include a partition wall extending from the wash water inlet toward the wash water outlet to guide the inflow of wash water.

A washing machine according to an aspect of the present invention includes an outer tub provided inside a cabinet and storing wash water; an inner tub rotatably installed inside the outer tub and accommodating laundry therein; a tub base coupled to a lower end of the inner tub and having a wash water inlet hole and a communication hole along a height direction; a guide member coupled to a lower surface of the tub base and configured to communicate the wash water inlet hole and the communication hole from the outside of the tub base; and a duct mounted inside the inner tub, extending along a height direction of the inner tub, and configured to communicate with the guide member through the communication hole.

The guide member may include a wash water inlet communicating with the wash water inlet hole; and a wash water outlet spaced apart from the wash water inlet and communicating with the communication hole, wherein the guide member may be disposed to cover the lower surface of the tub base.

The guide member may further include a barrier rib extending from the wash water inlet toward the wash water outlet to guide the inflow of the wash water.

The guide member may include a hook configured to be hooked in the communication hole.

A protrusion may be provided on a lower surface of the tub base, and a surround portion configured to surround the protrusion may be provided in the guide member.

The washing machine may further include a hub having a water flow inlet hole through which wash water stored in the outer tub flows into the tub base and coupled to a lower surface of the tub base to cover a portion of the surround part.

The washing machine may include: a pulsator rotatably provided on the tub base to form a washing water stream when rotating; a blade rotatably provided under the pulsator to form a pumping water stream that moves wash water to the wash water inlet hole when rotated; a planetary gear module provided between the pulsator and the blade to adjust a rotation ratio of the pulsator with respect to the blade; a fixing jig configured to surround and fix the planetary gear module, extend radially and be coupled to the tub base; and a jig fastening member fastened to the guide member by penetrating the fixing jig and the tub base.

The guide member may include an extension part extending to both sides and having a fastening groove for fixing the jig fastening member.

The duct may include a recess portion extending in a longitudinal direction and disposed to cover an upper surface of the tub base and an inner surface of the inner tub; and ribs extending along both sides of the recessed portion to define the recessed portion, wherein the recessed portion forms an upward flow path for washing water together with the top surface of the tub base and the inner surface of the inner tub. can

The rib part may be provided with a catching hook configured to be catching in the catching hole of the inner tub.

A fastening part fastened to the duct fastening member penetrating the inner tub by screwing may be formed on the rib part.

Accommodating grooves providing a space in which the duct sealing member is seated may extend along both sides of the recess portion in the rib portion.

Guide ribs extending from both sides of the duct along the height direction of the inner tub may protrude inside the inner tub.

A lower end of the duct may be configured to cover the tub base around the communication hole.

The washing machine may further include a filter unit communicating with an upper end of the duct and discharging wash water from which foreign substances are filtered into the inner tub.

The filter unit may include a filter housing mounted on the inner tub and having a communication portion communicating with an upper end of the duct and an opening opening toward the inside of the inner tub; and a mesh filter mounted on the filter housing to cover the opening and filtering foreign substances contained in the wash water and a filter having discharge holes through which the foreign substances filtered out are discharged.

The filter housing includes an accommodation groove formed to surround the communication portion and providing a space in which a filter sealing member is seated, and when the filter housing is mounted on the inner tub, the filter sealing member adheres closely to the inner tub. can be configured.

The washing machine may further include a filter fastening member that passes through the inner tub and is fastened to the filter housing.

A washing machine according to another aspect of the present invention includes an outer tub provided inside a cabinet and storing wash water; an inner tub rotatably installed inside the outer tub and accommodating laundry therein; a tub base coupled to a lower end of the inner tub and having a wash water inlet hole and a communication hole; and a guide member coupled to a lower surface of the tub base and configured to communicate the wash water inlet hole and the communication hole outside the tub base, wherein the guide member communicates with the wash water inlet hole. a washing water inlet; a wash water outlet provided at a position spaced apart from the wash water inlet and communicating with the communication hole; and a barrier rib extending from the wash water inlet toward the wash water outlet to guide the inflow of the wash water.

The washing machine may further include a duct mounted inside the inner tub, extending along a height direction of the inner tub, and configured to communicate with the guide member through the communication hole.

The effects of the present invention obtained through the above solutions are as follows.

First, the wash water pumped by the blade is introduced into the guide member and moved from the wash water inlet hole to the communication hole. At this time, the flow of wash water is performed outside the tub base. Thereafter, the wash water moves to the upper side of the inner tub through the wash water ascending passage, and at this time, the wash water flows inside the tub base and the inner tub. As described above, according to the present invention, a new flow path structure in which a flow path for rising wash water pumped by the blade is changed from the outside to the inside of the tub base can be implemented.

Second, since the blade is accommodated in the first part of the tub base and the fixing jig and the pulsator are accommodated in the second part stepped upwardly outward with respect to the first part, a cover for covering the fixing jig is unnecessary. Accordingly, the inner lower portion of the inner tub assembly may be configured more simply, manufacturing costs may be reduced, and an assembly process may be simplified.

Third, since the filter unit is mounted on the top of the duct, wash water from which foreign substances have been filtered may fall from a higher position and be discharged to a wider area within the inner tub. Therefore, the foaming effect can be improved.

In addition, since the filter unit is positioned adjacent to the door that opens and closes the upper opening of the inner tub assembly, the user can easily access the filter unit without bending the waist too much due to this arrangement structure. Accordingly, the user can easily remove foreign substances accumulated in the filter unit.

Fourth, since the power transmitted from the drive motor is transmitted to the blade without deceleration, the pumping head due to the rotation of the blade can be increased, and the planetary gear module is provided between the blade and the pulsator so that the pulsator is slower than the blade but with high torque. It is rotated so that the driving motor can be efficiently operated.

In addition, a partition is formed on the guide member coupled to the bottom surface of the tub base and extends from the wash water inlet toward the wash water outlet to guide the inflow of wash water into the guide member. Accordingly, a larger amount of wash water may flow into the wash water ascending path.

1 is a cross-sectional view of a washing machine according to an embodiment of the present invention viewed from the side;
2 is a conceptual view showing internal components of the washing machine shown in FIG. 1;
3 is an exploded view of the washing machine shown in FIG. 2;
Figure 4 is a perspective view showing the guide member of Figure 3;
5 and 6 are conceptual views illustrating a process of coupling a guide member and a hub to the tub base shown in FIG. 3;
7 and 8 are conceptual and cross-sectional views showing a coupling structure between the fixing jig, the tub base, and the guide member shown in FIG. 3;
9 is a view showing the washing machine shown in FIG. 2 by cutting along line AA;
10 is a side view of the washing machine shown in FIG. 2;
11 is a conceptual view showing a duct and a filter unit separated from the inner tub of FIG. 9;
12 is an enlarged view of part B of FIG. 9;
13 is a view showing the washing machine shown in FIG. 2 by cutting it along line CC;
14 is a conceptual diagram showing the duct and filter unit shown in FIG. 3;
15 is an enlarged view of part D of FIG. 13;

Hereinafter, a washing machine related to the present invention will be described in more detail with reference to the drawings.

Singular expressions include plural expressions unless the context clearly dictates otherwise.

In describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions thereof will be omitted.

The accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes and equivalents included in the spirit and technical scope of the present invention are included. It should be understood to include water or substitutes.

FIG. 1 is a cross-sectional view of a washing machine 100 according to an embodiment of the present invention viewed from the side, FIG. 2 is a conceptual diagram showing internal components of the washing machine 100 shown in FIG. 1, and FIG. It is an exploded view of the washing machine 100.

Referring to the drawings, the washing machine 100 includes a cabinet 110 forming an external shape, an outer tub 120 provided inside the cabinet 110 to store wash water, and an outer tub 120 rotatably inside the outer tub 120. It has an inner tub assembly 130 configured.

The cabinet 110 includes an opening communicating with the laundry storage space in the inner tub assembly 130 and a door 111 opening and closing the opening. 1 illustrates that the door 111 is provided on the top of the cabinet 110 .

The outer tub 120 is configured to have a tubular shape with one side corresponding to the opening of the cabinet 110 open. Wash water supplied from the wash water supply unit is stored in the outer tub 120, and detergent supplied from the detergent supply unit is dissolved in the wash water.

As shown, the outer tub 120 may be supported by the suspension bar 140 mounted inside the cabinet 110 .

The inner tub assembly 130 has a laundry storage space for accommodating laundry therein. The inner tub assembly 130 is configured to be rotatable by receiving power from the driving motor 180 . The inner tub assembly 130 may be configured to selectively receive power from the driving motor 180 by a clutch, be fixed during washing and rinsing, and rotate during spin-drying.

The inner tub assembly 130 includes an inner tub 131, a balancer 132 mounted on the top of the inner tub 131, a tub base 133 coupled to the bottom of the inner tub 131, and a tub base 133. It includes a hub 134 coupled to the bottom surface of. Wash water stored inside the outer tub 120 is introduced into the inner tub assembly 130 through the water inlet hole 134a of the hub 134 and the opening 133a of the tub base 133.

The inner tub 131 is formed in a tubular shape with both sides open. The inner tub 131 is provided with a plurality of spin-drying holes (not shown) through which washing water can escape during spin-drying. The inner tub 131 is formed of a metal material, and preferably may be formed of a stainless steel material for corrosion resistance and prevention of bacterial propagation.

A balancer 132 is coupled to an upper end of the inner tub 131 to reduce vibration caused by eccentric rotation of the inner tub assembly 130 containing laundry. The balancer 132 may be coupled to the inner tub 131 by curling or bolting. The balancer 132 is formed in a circular ring shape corresponding to the inner tub 131 and has a hollow part 132a corresponding to the inner space of the inner tub 131.

The balancer 132 is filled with a predetermined amount of fluid. For example, the inside of the balancer 132 may be filled with fluid to about 40% to 70% of the internal volume of the balancer 132, and salt water may be used as the fluid.

When the laundry is rotated while being eccentric to one side of the inner tub assembly 130, the fluid filled in the balancer 132 moves to the opposite side. Accordingly, vibration of the inner tub assembly 130 caused by eccentricity of laundry may be reduced.

A tub base 133 is coupled to a lower end of the inner tub 131 . The tub base 133 may be coupled to the inner tub 131 by curling or welding. The tub base 133 has a circular ring shape with an opening 133a formed therein. The opening 133a communicates with the water flow inlet hole 134a of the hub 134 so that wash water stored in the outer tub 120 can flow in.

The hub 134 connected to the driving motor 180 is coupled to the lower surface of the tub base 133 . The inner tub assembly 130 is rotated by receiving power from the driving motor 180 through the hub 134 . A water flow inlet hole 134a is formed in the hub 134 .

A blade 150 and a pulsator 160 are provided at the bottom of the inner tub assembly 130, and are configured to be selectively rotatable by receiving power from the drive motor 180. The pulsator 160 is disposed on the blade 150 to cover the blade 150. The tub base 133 includes a first part 133b1 and a second part 133b2 accommodating the blade 150 and the pulsator 160, respectively, and the second part 133b2 is the first part 133b1 It has an upward stepped shape to the outside with respect to .

A wash water inlet hole 133' is formed in the first part 133b1 of the tub base 133, and a communication hole 133" is formed in the upper side of the second part 133b2. A guide member 136 connecting the wash water inlet hole 133' and the communication hole 133" is mounted on the bottom surface.

The blade 150 is configured to be rotatable within the first part 133b1, and includes a rotating plate 151 and a pumping wing 152 protruding from the lower surface of the rotating plate 151. The rotating plate 151 is configured to be connected to the driving motor 180 to receive power, and the pumping wing 152 pumps the wash water filled in the lower part of the rotating plate 151 through the wash water inlet hole when the rotating plate 151 rotates. (133') to form a pumping water flow. The pumping wing 152 may extend radially from the center of the rotating plate 151 .

The pulsator 160 is configured to be rotatable within the second part 133b2. The pulsator 160 together with the tub base 133 forms a bottom portion containing laundry. The pulsator 160 includes a rotation plate 161 configured to be rotatable by receiving rotational force from the planetary gear module 170 and a protrusion 162 radially extending on the rotation plate 161 . The pulsator 160 receives power from the driving motor 180 and rotates in a forward direction and/or a reverse direction to form a rotational flow. Laundry can be washed in the same manner as rubbing and washing by the rotating water flow.

Both the blade 150 and the pulsator 160 are rotated by receiving power from the driving motor 180 directly or indirectly. Since the pulsator 160 is made to agitate wash water and laundry, the rotational load applied to the pulsator 160 is relatively large compared to the blade 150, so that the driving motor 180 is powered by the pulsator 160. If it is transmitted as it is, the drive motor 180 may be overburdened.

In order to adjust the rotation ratio of the pulsator 160 with respect to the blade 150, the planetary gear module 170 is provided between the blade 150 and the pulsator 160. The planetary gear module 170 reduces the rotational speed of the driving motor 180 and transmits the power of the driving motor 180 to the pulsator 160 . Accordingly, the pulsator 160 may be rotated with higher torque than the blade 150 .

The planetary gear module 170 is positioned in a fixed state on the shaft of the driving motor 180 by the fixing jig 190 . The fixing jig 190 is configured to surround and fix the planetary gear module 170, and is radially extended and coupled to the tub base 133. The jig fastening member 191 may pass through the fixing jig 190 and the tub base 133 and be fastened to the guide member 136 .

On the other hand, in the washing machine 100 of the present invention, a flow path for increasing wash water pumped by blades is formed differently from a general washing machine. Hereinafter, this will be described in detail.

FIG. 4 is a perspective view showing the guide member 136 of FIG. 3 .

Referring to FIG. 4 , the guide member 136 is a member that guides the pumping water stream formed by the rotation of the blade 150 to the washing water ascending passage 130a, and is a wash water inlet hole formed in the tub base 133 ( 133') and the communication hole 133" are configured to communicate with each other from the outside of the tub base 133.

To this end, the guide member 136 includes a wash water inlet 136' and a wash water outlet 136" communicating with the wash water inlet hole 133' and the communication hole 133", respectively. The wash water inlet 136' and the wash water outlet 136" are spaced apart from each other and formed to communicate with each other. In this drawing, one end of the guide member 136 having the wash water inlet 136' is formed. It is shown that the other end of the guide member 136 inserted into the wash water inlet hole 133' and formed with the wash water outlet 136" is disposed to cover the communication hole 133".

The guide member 136 may be fixed by hook coupling with the tub base 133 . In this drawing, it is exemplified that the hook 136a is formed at the other end of the guide member 136 where the wash water outlet 136" is formed to be hooked into the communication hole 133". The wash water outlet 136″ is mutually connected to the inlet (lower end) of the wash water flow path formed by the tub base 133 and the duct 135 with the communication hole 133″ of the tub base 133 interposed therebetween. placed to face

Together with or separately from the hook 136a, as shown, the guide member 136 may be provided with a fixing hook 136b that can be hooked to a hook (not shown) formed on the lower surface of the tub base 133. .

The guide member 136 includes extensions 136c extending to both sides, and the extensions 136c may include coupling grooves 136d for fixing the jig coupling member. The aforementioned fixing hook 136b may be provided on the extension 136c.

The pumping water flow of washing water formed by the rotation of the blade 150 has a direction corresponding to the rotation direction of the blade 150 . As a result, a considerable amount of wash water forms a vortex around the wash water inlet 136' and stays there or passes through the wash water inlet 136' and does not flow into the guide member 136.

To solve this problem, the guide member 136 may be provided with a partition wall 136f extending from the wash water inlet 136' toward the wash water outlet 136". The partition wall 136f is the inlet of wash water. is guided so that a larger amount of washing water can be introduced into the guide member 136.

The partition wall 136f may be located at the center of the wash water inlet 136'. In this case, the washing water flows into the spaces on both sides of the partition wall 136f almost equally, so that the washing water flowing out through the washing water outlet 136″ can flow out evenly over the entire area without being biased to one side.

Hereinafter, a process of coupling the guide member 136 and the hub 134 to the tub base 133 will be described with reference to FIGS. 5 and 6 .

First, referring to FIG. 5 together with FIG. 4 , the guide member 136 is mounted on the lower surface of the tub base 133 . Since the guide member 136 is configured to communicate the wash water inlet hole 133' and the communication hole 133" from the outside of the tub base 133, it should be mounted at a predetermined position on the bottom surface of the tub base 133. do.

To this end, a protrusion 133c is provided on the bottom surface of the tub base 133, and a surround portion 136e surrounding the protrusion 133c is provided in the guide member 136. In this drawing, it is shown that the surround part 136e extends from both sides of the wash water inlet 136', respectively.

As shown, the surround portion 136e may be configured such that portions extending from both sides of the wash water inlet 136' do not connect to each other so as to surround a portion of the protrusion 133c, or completely surround the protrusion 133c. It may also be configured such that the respective extensions on both sides of the wash water inlet 136' are connected to each other.

Since the surround portion 136e is formed to surround the protruding portion 133c, the mounting position of the guide member 136 relative to the tub base 133 may be determined. In addition, as described above, when the guide member 136 is mounted on the tub base 133, the fixing hook 136b may be caught on the bottom surface of the tub base 133, and the hook 136a may be connected to the communication hole 133. "). Through this fixing structure, the guide member 136 can be mounted at a predetermined position of the tub base 133.

With the guide member 136 mounted on the bottom of the tub base 133, as shown in FIG. 6, the hub 134 may be mounted on the bottom of the tub base 133. The hub 134 is formed of a circular member having a predetermined thickness and is mounted on the tub base 133 . As the hub 134 is mounted on the tub base 133, overall rigidity of the inner tub assembly 130 may be improved. The hub 134 is coupled to the rotational shaft 181 of the drive motor 180 and transmits power generated by the drive motor 180 to the inner tub assembly 130 .

The hub 134 is provided with a water flow inlet hole 134a communicating with the opening 133a of the tub base 133 . Wash water stored in the outer tub 120 is introduced into the inner tub assembly 130 through the water inlet hole 134a of the hub 134 and the opening 133a of the tub base 133 . As shown, a plurality of water flow inlet holes 134a may be formed repeatedly along the circumferential direction of the hub 134 . In this embodiment, the water flow inlet hole 134a is illustrated as having a fan shape, but the shape of the water flow inlet hole is not limited thereto.

The hub 134 is disposed to cover a portion of the guide member 136 when mounted on the lower surface of the tub base 133 . In this figure, it is shown that a part of the surround portion 136e is covered by the hub 134. By the mounting structure, the vertical movement of the guide member 136 can be limited, so that a more robust fixing structure of the guide member 136 can be implemented.

7 and 8 are conceptual and cross-sectional views showing a coupling structure between the fixing jig 190, the tub base 133, and the guide member 136 shown in FIG. 3 .

7 and 8, a fixing jig 190 for fixing the position of the planetary gear module 170 is provided between the pulsator 160 and the blade 150. The fixing jig 190 extends radially and is coupled to the tub base 133 .

When the fixing jig 190 is configured to protrude more in the radial direction than the pulsator 160, a cover for covering the fixing jig 190 is required. However, in the present invention, since the tub base 133 is formed stepwise and has a structure in which the fixing jig 190 and the pulsator 160 are accommodated in the stepped recessed portion, a cover for covering the fixing jig 190 is provided. It is unnecessary.

Specifically, as described above, the first part 133b1 and the second part 133b2 are formed in two steps on the tub base 133 . A second portion 133b2 is positioned on the first portion 133b1, and the second portion 133b2 has an upwardly stepped shape with respect to the first portion 133b1. The blade 150 is accommodated in the first part 133b1, and the fixing jig 190 and the pulsator 160 are accommodated in the second part 133b2. For reference, the guide member 136 is disposed to cover the lower surface of the tub base 133 .

The fixing jig 190 is configured to be fixed to the bottom surface of the second part 133b2. To this end, the jig fastening member 191 can pass through the fixing jig 190 and the bottom surface and be fastened to the guide member 136 (specifically, the fastening groove 136d provided in the extension part 136c). there is. By fastening the jig fastening member 191 , the fixing jig 190 and the guide member 136 can be firmly fixed to the tub base 133 .

The pulsator 160 is disposed to cover the fixing jig 190 and is accommodated in the second portion 133b2 together with the fixing jig 190 . The pulsator 160 preferably has a larger diameter than the fixing jig 190 so that the fixing jig 190 is not exposed to the outside.

In addition, ends of the pulsator 160 and the tub base 133 facing each other may be disposed adjacent to each other on the same layer. According to the above structure, it is possible to prevent laundry from being caught in the gap between the pulsator 160 and the tub base 133.

Hereinafter, wash water moved from the wash water inlet hole 131' to the communication hole 133" from the outside of the tub base 133 by the guide member 136 is moved toward the top of the inner tub 131. A flow path structure that can be described is described.

9 is a view of the washing machine 100 shown in FIG. 2 cut along line A-A, FIG. 10 is a side view of the washing machine 100 shown in FIG. 2, and FIG. 11 is the inner tub 131 of FIG. 9 is a conceptual diagram showing the duct 135 and the filter unit 137 separated from each other. 12 is an enlarged view of part B of FIG. 9, FIG. 13 is a view showing the washing machine 100 shown in FIG. 2 cut along line C-C, and FIG. 14 is a view showing the duct 135 shown in FIG. and a conceptual diagram showing the filter unit 137.

Referring to these drawings together with the preceding drawings, a duct 135 extending along the height direction of the inner tub 131 is mounted inside the inner tub 131 . An empty space extending upward is formed between the duct 135 and the tub base 133 and between the duct 135 and the inner tub 131, and the empty space forms an ascending passage 130a of wash water.

In this embodiment, it is illustrated that two ducts 135 are provided to face each other in the inner tub 131 . However, the present invention is not limited thereto. Two or more ducts 135 may be provided according to design changes.

The duct 135 is configured to communicate with the guide member 136 through the communication hole 133" so that the wash water introduced through the guide member 136 flows into the ascending passage 130a of the wash water. To this end, as shown in FIG. 12 , the lower end of the duct 135 may be configured to cover the tub base 133 around the communication hole 133″.

Hereinafter, the detailed configuration and fastening structure of the duct 135 will be described.

The duct 135 includes a first cover part 135' disposed to cover the upper surface of the tub base 133 and a second cover part 135" disposed to cover the inner surface of the inner tub 131. The first cover part 135' is disposed to cover the communication hole 133", and the second cover part 135" is disposed inclined with respect to the first cover part 135'. Tub base 133 A protruding rib (not shown) partially corresponding to the shape of the first cover part 135' may be formed on the upper surface of the first cover part 135' to guide the installation position of the first cover part 135'. The end of ) may be made to be in close contact with the protruding rib.

The duct 135 has a recessed portion 135a extending along the longitudinal direction. The recess portion 135a is formed throughout the first cover portion 135' and the second cover portion 135". The duct 135 has a 'c'-shaped cross section by the recess portion 135a. can have

The recess portion 135a is disposed to face the upper surface of the tub base 133 and the inner surface of the inner tub 131, so that the washing water can be washed with the upper surface of the tub base 133 and the inner surface of the inner tub 131. The rising passage 130a is formed. Accordingly, wash water discharged through the communication hole 133" moves upward through the first cover part 135' and the second cover part 135". Here, the lifting force of the washing water is due to the pumping water flow generated by the rotation of the blade 150 .

As described above, the wash water pumped by the blade 150 flows into the guide member 136 and moves from the wash water inlet hole 133' to the communication hole 133". At this time, the flow of wash water is performed on the outside of the tub base 133. After that, the wash water moves to the upper side of the inner tub through the wash water rising passage 130a. It is made inside the inner tub 131. That is, it can be said that there is a specificity of the flow path in that the flow of wash water is changed from the outside to the inside of the tub base 133.

As the recess portion 135a is formed in the duct 135, relatively protruding rib portions 135b are provided on both sides of the recess portion 135a. The rib portion 135b extends along the longitudinal direction of the duct 135 and defines the recessed portion 135a. When the duct 135 is mounted on the inner tub 131, the rib portion 135b may be configured to come into close contact with the inner surface of the inner tub 131.

The rib portion 135b is provided with a hook 135b1 configured to be hooked in the locking hole 131a of the inner tub 131 . In this embodiment (see FIGS. 10, 11, and 14), it is shown that hooks 135b1 are protruded from each of the ribs 135b provided on both sides of the recessed portion 135a.

The locking hook 135b1 may be configured to be hooked by sliding after being inserted into the locking hole 131a. In order to realize the hooking structure, the hooking hook 135b1 may include a protruding part 135b' protruding from the rib part 135b and an extension part 135b" extending downward from the protruding part 135b'. That is, the catching hook 135b1 may have a shape bent in the shape of 'L.' The catching hole 131a formed in the inner tub 131 is a slot extending along the height direction of the inner tub 131. ) can be formed in the form.

With the above configuration, the hook 135b1 is inserted into the hole 131a and then slid downward to be caught in the hole 131a. In a state where the hook 135b1 is caught in the hooking hole 131a, the extension part 135b1″ is disposed to cover the outer surface of the inner tub 131, and the protruding part 135b1′ extends through the hooking hole 131a. It can get stuck at the bottom.

Here, as shown in FIG. 11, the upper part 131a' of the hooking hole 131a is a part into which the extension part 135b1" is inserted, and is higher than the lower part of the hooking hole 131a where the protruding part 135b1' is hooked. It can be formed with a wide width.

However, the shapes of the catching hook 135b1 and the catching hole 131a and the catching structure accordingly are not limited to the example described above. The catching hook 135b1 may be configured to be fastened to the catching hole 131a by elastic deformation, and the coupling method of the duct 135 for this purpose is not only the insertion and sliding method described above, but also various methods such as a direct coupling method. this can be used

A guide rib 131c for guiding mounting of the duct 131 may protrude inside the inner tub 131 . The guide ribs 131c may extend from both sides of the duct 135 along the height direction of the inner tub 131 to limit the mounting position of the duct 135 .

As described above, when the duct 135 is fastened to the inner tub 131 in such a way that the catching hook 135b1 is inserted into the catching hole 131a and then slid downward to be caught in the catching hole 131a. , the sliding movement of the duct 131 may be guided by the guide ribs 131c.

The guide rib 131c may be integrally formed with the inner tub 131 . For example, the inner tub 131 may be press-worked to form the inner tub 131 having the guide ribs 131c formed thereon. However, the present invention is not limited thereto. Guide rib (131c) may be a separate component attached to the inner surface of the inner tub (131).

A fastening part 135b2 fastened to the duct fastening member 138b penetrating the inner tub 131 may be formed in the rib part 135b. In this embodiment, it is shown that the duct fastening member 138b penetrates the through hole 131b1 formed in the lower part of the inner tub 131 and is screwed to the fastening part 135b2.

The duct fastening member 138b may be configured to be fastened while being forcibly screwed to the fastening part 135b2. To this end, a guide groove (not shown) having no thread for guiding the fastening of the duct fastening member 138b may be provided in the fastening part 135b2. According to the fastening structure, the duct fastening member 138b can be fixed without a nut, so that easy assembly is possible.

Of course, the present invention is not limited to the fastening structure. An insert nut having a thread formed therein may be integrally formed in the fastening part 135b2 by insert injection for fastening with the duct fastening member 138b.

The fastening part 135b2 may protrude from the outer surface of the duct 131 in view of being fastened with the duct fastening member 138b. That is, the fastening portion 135b independently protrudes from the inside of the inner tub 131, and is preferably formed in a rounded shape so as not to damage laundry.

In addition, accommodating grooves 135b3 providing a space in which a duct sealing member (not shown) is seated may extend along both sides of the recess portion 135b in the rib portion 135b. With the above configuration, when the duct 135 is mounted on the inner tub 131, the duct sealing member is in close contact with the inner surface of the inner tub 131 and leaks the wash water flowing along the wash water ascending passage 130a. is made to prevent

The receiving groove 135b3 may be formed inside or outside the hook 135b1. In this embodiment, it is exemplified that the receiving groove 135b3 is formed on the outside of the hook 135b1.

The duct sealing member may be configured to fit into the receiving groove 135b3, and in this case, the receiving groove 135b3 may be understood as an insertion groove. Alternatively, the duct sealing member may be configured to be filled in the receiving groove 135b3, and in this case, the receiving groove 135b3 may be understood as a filling groove.

A filter unit 137 is mounted on the upper end of the duct 135, that is, on the upper end of the washing water ascending passage 130a. The filter unit 137 is configured to discharge foreign matter filtered wash water into the inner tub 131 . In that wash water is discharged through the filter unit 137, the filter unit 137 may also be referred to as a discharge unit.

Hereinafter, the filter unit 137 and a structure for discharging wash water through the filter unit 137 will be described in more detail.

15 is an enlarged view of part D of FIG. 13 .

Referring to this figure together with the previous figures, the filter unit 137 includes a filter housing 137a and a filter 137b.

The filter housing 137a is mounted on the inner tub 131 and communicates with the upper end of the duct 135 . The filter housing 137a has a communication portion 137a1 and an opening 137a2.

The communication portion 137a1 is a recessed portion of the filter housing 137a and communicates with the upper end of the duct 135 . That is, the communication part 137a1 is disposed to cover the inner surface of the inner tub 131, and communicates with the inner surface of the inner tub 131 and the washing water rising passage 130a (130b). ) to form

A filter sealing member may be interposed between the inner tub 131 and the filter housing 137a to prevent the wash water flowing through the wash water discharge channel 130b from leaking. To this end, an accommodation groove 137a3 for mounting a filter sealing member (not shown) may be formed in the protruding portion to surround the communication portion 137a1.

An end of the accommodating groove 137a3 formed in the filter housing 137a may be formed to correspond to an end of the accommodating groove 135b3 formed in the duct 135 described above. In this case, the accommodating groove 135b3 formed in the duct 135 and the accommodating groove 137a3 formed in the filter housing 137a are continuously connected, so that at the junction between the duct 135 and the filter housing 137a. Leakage of washing water can be prevented. Also, the filter sealing member and the duct sealing member may be integrally formed.

The opening 137a2 communicates with the communication portion 137a1 and is formed to open toward the inside of the inner tub 131 . As shown, the opening 137a2 may extend in one direction.

The filter 137b is mounted on the filter housing 137a so as to cover the opening 137a2. The filter 137b may be completely detachable from the filter housing 137a. For example, in a state where the lower end of the filter 137b is hooked to the filter housing 137a, the upper end of the filter 137b is hooked to the filter housing 137a so that the filter 137b is attached to the filter housing 137a. can be fitted

Alternatively, the filter 137b may be rotatably coupled to the filter housing 137a. For example, a lower end of the filter 137b may be hinged to the filter housing 137a, and an upper end of the filter 137b may be hooked to the filter housing 137a.

The filter 137b includes a mesh filter 137b1 having a net structure for filtering foreign substances. The mesh filter 137b1 is disposed to cover the opening 137a2 of the filter housing 137a, and filters foreign matter included in wash water flowing through the opening 137a2.

The filter 137b has discharge holes 137b2 for discharging wash water. The discharge holes 137b2 may be formed in the form of small holes or in the form of elongated slits, or a combination thereof.

9, 11 and 13 show that a slit-shaped discharge hole 137b2' is formed on the top of the filter 137b, and small hole-shaped discharge holes 137b2" are formed below it. According to the configuration, washing water is sprayed over a large area through the slit-shaped discharge holes 137b2' and sprayed at various points through the small-hole discharge holes 137b2", respectively, in various ways. Forgiveness can happen.

Since the duct 135 is disposed adjacent to the balancer 132, the filter unit 137 mounted thereto is also disposed adjacent to the balancer 132. That is, the filter unit 137 is positioned adjacent to the door 111 that opens and closes the upper opening of the inner tub assembly 130 .

Due to this arrangement structure, the user can easily access the filter unit 137 without bending too much. Accordingly, the user can easily remove foreign substances accumulated in the filter unit 137 .

In addition, as the filter unit 137 is positioned above the inner tub assembly 130, wash water discharged through the filter unit 137 may fall from a higher position. Therefore, wash water can be discharged to a larger area within the inner tub 131, and the effect of wetting can be improved.

Hereinafter, a structure in which the filter unit 137 is coupled to and fixed to the inner tub 131 will be described.

Referring to FIGS. 10, 11 and 14 , the filter fastening member 138a passes through the inner tub 131 and is fastened to the filter housing 137a. In order to implement the fastening structure, a through hole 131b2 is formed in the inner tub 131, and a fastening groove 137a4 corresponding to the through hole 131b2 is formed in the filter housing 137a. The filter fastening member 138a may pass through the through hole 131b2 and be screwed into the fastening groove 137a4.

The fastening groove 137a4 may be formed to have a diameter smaller than that of the filter fastening member 138a, so that the filter fastening member 138a is forcibly screwed into the fastening groove 137a4 and fastened thereto. According to the above fastening structure, the filter fastening member 138a can be fixed without a nut, so that easy assembly is possible.

Of course, the present invention is not limited to the fastening structure. An insert nut having a thread formed therein may be integrally formed in the filter housing 137a by insert injection for fastening with the filter fastening member 138a.

100: washing machine 110: cabinet
111: door 120: outer tub
130: Inner tub assembly 130a: Rising passage of wash water
130b: wash water discharge passage 131: inner tub
131a: locking hole 131b1, 131b2: through hole
131c: guide rib 132: balancer
132a: hollow part 133: tub base
133 ': washing water inlet hole 133": communication hole
133a: opening 133b1: first part
133b2: second part 133c: protrusion
134: hub 134a: water flow inlet hole
135: duct 135': first cover part
135 ": second cover part 135a: recess part
135b: rib part 135b1: hook
135b1': protrusion 135b1": extension
135b2: fastening part 135b3: receiving groove
136: guide member 136': washing water inlet
136 ": wash water outlet 136a: hook hook
136b: fixed hook 136c: extension
136d: fastening groove 136e: surround part
136f bulkhead 137 filter unit
137a: filter housing 137a1: communication part
137a2: opening 137a3: receiving groove
137a4: fastening groove 137b: filter
137b1: mesh filter 137b2: discharge holes
138a: filter fastening member 138b: duct fastening member
140: suspension bar 150: blade
151: rotating plate 152: pumping wing
160: pulsator 161: rotating plate
162: protrusion 170: planetary gear module
180: drive motor 181: rotational shaft
190: fixed jig 191: jig fastening member

Claims (20)

an outer tub provided inside the cabinet and storing wash water;
an inner tub rotatably installed inside the outer tub and accommodating laundry therein;
a tub base coupled to a lower end of the inner tub and having a wash water inlet hole and a communication hole along a height direction;
a guide member coupled to a lower surface of the tub base and configured to communicate the wash water inlet hole and the communication hole from the outside of the tub base; and
A duct mounted inside the inner tub, extending along the height direction of the inner tub, and configured to communicate with the guide member through the communication hole;
The guide member is:
a wash water inlet communicating with the wash water inlet hole;
a wash water outlet provided at a position spaced apart from the wash water inlet and communicating with the communication hole; and
and a partition wall extending from the wash water inlet toward the wash water outlet and positioned at a center of the wash water inlet to guide the inflow of the wash water. According to claim 1,
The washing machine, characterized in that the guide member is disposed to cover the lower surface of the tub base. delete According to claim 1,
The washing machine according to claim 1 , wherein the guide member includes a hook configured to be hooked into the communication hole. According to claim 1,
A protrusion is provided on the bottom surface of the tub base,
The washing machine according to claim 1 , wherein the guide member includes a surround portion configured to surround the protruding portion. According to claim 5,
The washing machine further comprises a hub having a water inlet hole through which wash water stored in the outer tub flows into the tub base and coupled to a lower surface of the tub base to cover a portion of the surround part. According to claim 1,
a pulsator rotatably provided on the tub base to form a washing water stream when rotating;
a blade rotatably provided under the pulsator to form a pumping water stream that moves wash water to the wash water inlet hole when rotated;
a planetary gear module provided between the pulsator and the blade to adjust a rotation ratio of the pulsator with respect to the blade;
a fixing jig configured to surround and fix the planetary gear module, extend radially and be coupled to the tub base; and
The washing machine further comprises a jig fastening member that penetrates the fixing jig and the tub base and is fastened to the guide member. According to claim 7,
The guide member,
A washing machine characterized in that it includes an extension part extending to both sides and having a fastening groove for fixing the jig fastening member. According to claim 1,
The duct is
a recess portion extending in a longitudinal direction and disposed to cover an upper surface of the tub base and an inner surface of the inner tub; and
A rib portion extending along both sides of the recess portion and defining the recess portion;
The washing machine according to claim 1 , wherein the recess portion forms an upward passage of wash water together with an upper surface of the tub base and an inner surface of the inner tub. According to claim 9,
Washing machine, characterized in that the rib part is provided with a hook configured to be configured to be hooked in the locking hole of the inner tub. According to claim 9,
Washing machine, characterized in that the rib part is formed with a fastening part fastened by screwing with the duct fastening member penetrating the inner tub. According to claim 9,
The washing machine according to claim 1 , wherein accommodating grooves providing a space in which a duct sealing member is seated in the rib part extend along both sides of the recess part. According to claim 1,
The washing machine, characterized in that guide ribs extending along the height direction of the inner tub protrude from both sides of the duct inside the inner tub. According to claim 1,
Washing machine, characterized in that the lower end of the duct is configured to cover the tub base around the communication hole. According to claim 1,
The washing machine further comprises a filter unit communicating with an upper end of the duct and discharging wash water from which foreign substances have been filtered into the inner tub. According to claim 15,
The filter unit,
a filter housing mounted on the inner tub and having a communication portion communicating with an upper end of the duct and an opening opening toward the inside of the inner tub; and
The washing machine may include a mesh filter mounted on the filter housing to cover the opening and filtering foreign matters contained in the wash water, and a filter having discharge holes through which the foreign matters filtered out are discharged. According to claim 16,
The filter housing,
A receiving groove formed to surround the communication portion and providing a space in which a filter sealing member is seated;
When the filter housing is mounted on the inner tub, the filter sealing member is configured to come into close contact with the inner tub. According to claim 16,
The washing machine further comprises a filter fastening member that penetrates the inner tub and is fastened to the filter housing. delete delete

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