KR20180131894A - Washing machine - Google Patents

Abstract

A washing machine of the present invention comprises: a casing having an inlet for putting laundry on a front surface; a tub arranged in the casing, containing washing water, and opened to allow the front surface to communicate with the inlet; a drum rotatably arranged in the tub, and containing laundry; a pump for pressing and transferring water discharged from the tub; a gasket for connecting the inlet and the inlet of the tub, and having a plurality of nozzles for spraying water into the drum; and a guide pipe fixated to the gasket, and guiding the water pumped by the pump to the nozzles. The guide pipe includes: an annular flow path which is arranged around the outer circumference of the gasket and introduces the water pressed and transferred by the pump; and a plurality of nozzle water supply ports which protrude from the annular flow path, pass through the gasket, and supply the water guided through the annular flow path to each of the nozzles.

Description

Washing machine {WASHING MACHINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine having a nozzle for discharging water circulating through a circulation tube to a drum.

Generally, a washing machine is a device that separates contaminants from clothes, bedding, etc. (hereinafter, referred to as "laundry") by using physical action such as chemical decomposition of water and detergent and friction between water and laundry It is collective.

Such a washing machine includes a tub containing water and a drum rotatably installed in the tub to receive the laundry. Recent washing machines are configured to circulate water discharged from the turbine using a circulation pump, and to spray the circulated water into the drum through a nozzle. However, since such a conventional washing machine usually has one or two nozzles, not only the case where only one nozzle is provided but also the case where two nozzles are provided, the jetting direction is limited, I did not. In particular, although new technologies for controlling the rotation of the drum have been developed in recent years to impart variety to the flow of laundry introduced into the drum, there is a limit in that a remarkable improvement in performance can not be expected with the conventional structure.

Also, in the conventional washing machine, a circulation pipe is connected to the circulation pump, water fed by the circulation pump is guided along the circulation pipe, and the water thus guided again connects the nozzle and the circulation pipe And is supplied to the nozzle through a connector. Conventionally, when two nozzles are provided, two circulation pipes connected to the circulation pump and two guide pipes connected to the two circulation pipes are required, so that the structure of the product is complicated, The process of assembling the tubes and the guide tubes made the manufacturing factory troublesome.

In addition, since there are many connection portions between the circulation pipe, the guide pipes, and the nozzles, there is a possibility that water leaks from the circulation pipe, the guide pipes, and the nozzles during operation of the washing machine. Particularly, There is a hygiene problem due to the coagulation of detergent contained in the circulating water and the deposition of contaminants.

SUMMARY OF THE INVENTION A first object of the present invention is to provide a gasket which is provided with a plurality of nozzles for spraying water into a drum, and water (hereinafter referred to as circulating water) And a washing machine which is sprayed through a nozzle. In particular, an annular guide pipe for supplying circulation water to the plurality of nozzles is provided in the gasket, and the outer circumferential surface of the guide pipe is not exposed to the washing water sprayed from the plurality of nozzles.

Second, water discharged from the turbine is guided through one common guide pipe, and water guided through the guide pipe is injected through nozzles disposed at different heights on the gasket.

Third, the present invention provides a washing machine capable of varying the flow rate (or water pressure) of water sprayed through the nozzles.

Fourthly, the present invention provides a washing machine in which water sprayed through the nozzle can reach a deep position inside the drum.

Fifth, even if permeation washing is performed in a state in which a large amount of wool is put in, the water sprayed from the nozzle can evenly wet the wool.

A washing machine according to the present invention includes a casing having a charging port for charging laundry into a front surface thereof, a tub disposed in the casing and containing laundry water and having a front surface communicating with the charging port, The gasket comprises a drum, a pump for feeding water discharged from the tub, a gasket having a plurality of nozzles for communicating the inlet of the tub with the inlet of the tub and spraying water into the drum, And a guide pipe fixed to the gasket and guiding the water pumped by the pump to the plurality of nozzles.

The guide pipe includes an annular passage through which water pumped by the pump flows, and water is supplied to the plurality of nozzles through the annular passage.

The annular flow path is disposed in the outer peripheral portion of the gasket. A plurality of nozzle water supply ports protruding from the annular flow passage, and each of the plurality of water supply ports passes through the gasket to supply water to the plurality of nozzles.

In the washing machine of the present invention, since the annular flow passage constituting the guide tube is disposed at the outer peripheral portion of the gasket, circulation water sprayed from the plurality of nozzles is prevented from reaching the annular flow passage, The outer circumferential surface can be kept clean.

Second, since the annular flow path is provided outside the gasket, it is easy to separate the annular flow path for the maintenance water.

Third, since the water discharged from the turbine is guided to the plurality of nozzles through one common guide pipe, there is an effect that the flow path structure for supplying water to the plurality of nozzles is simplified.

Fourth, even if permeation washing is performed in a state in which a large amount of bubbles are injected, the water sprayed from the nozzle can effectively wet the bubbles.

1 is a perspective view illustrating a washing machine according to an embodiment of the present invention.
2 is a sectional view of the washing machine shown in Fig.
FIG. 3 shows a part of the washing machine shown in FIG. 1.
4 is a perspective view showing an assembly of a gasket and a guide pipe.
Figure 5 is a front view of the assembly shown in Figure 4;
Figure 6 is a rear view of the assembly shown in Figure 4;
7 is an enlarged view of a portion A in Fig.
FIG. 8 is a right side view of the assembly shown in FIG.
9 is a front view of the guide tube.
Fig. 10 shows a right side view (a) of the guide tube shown in Fig. 9 and a section at points A and B shown in Fig. 9 (a).
11 is a cross-sectional view taken along II of Fig.
12 is a cross-sectional view taken along line II-II in FIG.
13 is a cross-sectional view taken along line III-III in FIG.
14 is a partial view of a washing machine to which a guide tube according to another embodiment of the present invention is applied.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

1 is a perspective view illustrating a washing machine according to an embodiment of the present invention. 2 is a sectional view of the washing machine shown in Fig. FIG. 3 shows a part of the washing machine shown in FIG. 1.

1 is a perspective view illustrating a washing machine according to an embodiment of the present invention. 2 is a sectional view of the washing machine shown in Fig. FIG. 3 shows a part of the washing machine shown in FIG. 1.

Referring to FIGS. 1 and 2, the casing 10 forms an outer surface of the washing machine, and a charging port 12h through which laundry is charged is formed on the front surface. The casing 10 includes a cabinet 11 having a front surface and a left surface, a right surface and a rear surface and a front panel 12 coupled to an opened front surface of the cabinet 11 and having a charging port 12h formed therein . A bottom surface and an upper surface of the cabinet 11 are opened, and a horizontal base 15 supporting the washing machine can be coupled to the bottom surface. The casing 10 may further include a top plate 13 covering an open upper surface of the cabinet 11 and a control panel 14 disposed on the top of the front panel 12. [

In the casing (10), a tub (31) containing water can be disposed. The tub 31 has an inlet formed at the front thereof so that the laundry can be input, and the inlet is communicated with the inlet 12h formed in the casing 10 by the gasket 60. [

The door 20 for opening and closing the inlet 12h can be rotatably coupled to the casing 10. [ The door 20 may include a door frame 21 that is open at a substantially central portion and is rotatably coupled to the front panel 12 and a transparent window 22 that is installed at the open central portion of the door frame 21 have.

The gasket 60 is for preventing water contained in the tub 31 from leaking. The front end portion is engaged with the front surface (or the front panel 12) of the casing 10, and the rear end portion is coupled with the periphery of the inlet of the tub 31, and the front end portion and the rear end portion extend in a tubular form. The gasket 60 may be made of a flexible or resilient material. The gasket 60 may be made of natural rubber or synthetic resin.

Hereinafter, the portion defining the inside of the tubular shape of the gasket 60 is referred to as the inner peripheral portion (or the inner peripheral surface) of the gasket 60, and the portion opposite thereto is referred to as the outer peripheral portion .

In the tub 31, a drum 32 in which laundry is received may be rotatably provided. The drum 32 receives the laundry, and the inlet through which the laundry is introduced is disposed on the front surface, and is rotated around a substantially horizontal rotation center line C. However, "horizontal" here is not a term used mathematically as a strict sense. That is, as in the embodiment, when the rotational center line C is inclined at a predetermined angle (for example, 5 degrees or less) with respect to the horizontal, it is also approximate horizontal. A plurality of through holes may be formed in the drum 32 so that water in the tub 31 can be introduced into the drum 32. [

The driving shaft 38a rotated by the driving unit 38 may be coupled with the drum 32 through the rear portion of the tub 31 .

Preferably, the driving unit 38 includes a direct-coupled motor, and the motor includes a stator fixed to the rear of the tub 31 and a rotor rotated by a magnetic force acting between the stator and the stator . The drive shaft 38a can be rotated integrally with the rotor.

The tub 31 may be supported by a damper 16 provided on the base 15. [ The vibration of the tub 31 caused by the rotation of the drum 32 is attenuated by the damper 16. Although not shown, according to the embodiment, a hanger (for example, a spring) for hanging the tub 31 in the casing 10 may be further provided.

At least one water supply hose (not shown) for guiding water supplied from an external water source such as a faucet to the tub 31, and a water supply unit 33 for interrupting the at least one water supply hose.

A dispenser 35 for supplying an additive such as a detergent, a fabric softener or the like into the tub 31 or the drum 32 may be provided. In the dispenser 35, the additives can be accommodated according to their kinds. The dispenser 35 may include a detergent receiving portion (not shown) for receiving the detergent and a softening agent receiving portion (not shown) for receiving the fabric softening agent.

At least one water supply pipe 34 for selectively guiding the water supplied through the water supply unit 33 to the respective receiving portions of the dispenser 35 may be provided. The water supply section 33 may include at least one water supply valve for interrupting each water supply pipe 34.

The at least one water supply pipe 34 may include a first water supply pipe for supplying water to the detergent receiving part and a second water supply pipe for supplying water to the fabric softener receiving part, A first water supply valve for interrupting the first water supply pipe and a second water supply valve for interrupting the second water supply pipe.

The gasket 60 may be provided with a direct water nozzle 42 for injecting water into the drum 32 and a direct water supply pipe 39 for guiding the water supplied through the water supply part 33 to the direct water nozzle 42 May be provided. The water supply unit 33 may include a third water supply valve for interrupting the direct water supply pipe 39.

The water discharged from the dispenser (35) is supplied to the tub (31) through the water supply bellows (37). A water supply port (not shown) connected to the water supply bellows 37 may be formed in the tub 31.

The tub 31 is formed with a drain port for discharging water, and a drain valve 17 can be connected to the drain port. A pump 36 for pumping water discharged through the drainage bellows 17 may be provided.

The pump 36 can selectively perform the function of sending the water discharged through the drainage bellows 17 to the drain pipe 19 and the function of feeding the water discharged through the circulation pipe 18 to be described later. Hereinafter, the water which is fed by the pump 36 and guided along the circulation pipe 18 is referred to as circulating water.

The pump 36 may include an impeller (not shown) for feeding water, a pump housing (not shown) for receiving the impeller, and a pump motor (not shown) for rotating the impeller. The pump housing is provided with an inlet port (not shown) through which the water flows through the drainage bellows 17, a drainage discharge port (not shown) through which the water fed by the impeller is discharged to the drainage pipe 19, And a circulating water discharge port (not shown) for discharging the pressurized water to the circulation pipe 18 can be formed.

The pump motor may be capable of forward / reverse rotation. Depending on the direction in which the impeller is rotated, water may be discharged through the drain discharge port or water may be discharged through the circulation water discharge port. Such a configuration can be realized by appropriately designing the structure of the pump housing, and such a technique is already known in Korean Patent Laid-Open Publication No. 10-2013-0109354, and a detailed description thereof will be omitted.

The inlet of the circulation pipe 18 is connected to the circulating water discharge port, and the outlet is connected to a guide pipe 70 to be described later. However, the present invention is not limited to this, and a circulation pump for feeding the water discharged from the tub 31 to the circulation pipe 18 and a drain pump for feeding the water discharged from the tub 31 to the drain pipe 19 may be separately provided . (For example, when draining) the circulation pump according to a predetermined algorithm under the control of a control unit (not shown) to be described later (for example, during washing).

On the other hand, the pump 36 is variable in flow rate (or discharge water pressure). For this purpose, the pump motor constituting the pump 36 may be a variable speed motor capable of controlling the rotation speed. The pump motor may be a BLCD motor (Brushless Direct Current Motor), but is not limited thereto. A driver for controlling the speed of the motor may be further provided, and the driver may be an inverter driver. The inverter driver converts AC power to DC power and inputs it to the motor at the target frequency.

A control unit for controlling the pump motor may be further provided. The control unit may include a proportional-integral controller (PI controller), a proportional-integral-differential controller (PID controller), and the like. The controller receives the output value of the pump motor (for example, the output current) as an input, and controls the output value of the driver so that the rotational speed of the pump motor follows a predetermined target rotational speed.

It is to be understood that the control unit can control not only the pump motor but also the entire operation of the washing machine, and that the control of each part mentioned below is controlled by the control unit.

Referring to FIG. 3, at least one balancer 81, 82, 83 may be provided on the front surface of the tub 31 along the inlet of the tub 31. The balancers 81, 82, and 83 are used to reduce the vibration of the tub 31, and are weight bodies having a predetermined weight. A plurality of balancers 81, 82, and 83 may be provided. A first upper balancer 81 and a second upper balancer 82 are provided on the left and right sides of the front surface of the tub 31 and a lower balancer 83 is provided below the front surface of the tub 31 .

4 is a perspective view showing an assembly of a gasket and a guide pipe. Figure 5 is a front view of the assembly shown in Figure 4; Figure 6 is a rear view of the assembly shown in Figure 4; 7 is an enlarged view of a portion A in Fig. FIG. 8 is a right side view of the assembly shown in FIG. 9 is a front view of the guide tube. Fig. 10 shows a right side view (a) of the guide tube shown in Fig. 9 and a section at points A and B shown in Fig. 9 (a). 11 is a cross-sectional view taken along line I-I of Fig. 12 is a cross-sectional view taken along line II-II in FIG. 13 is a cross-sectional view taken along line III-III in FIG.

11, the gasket 60 includes a casing coupling portion 61 coupled to the inlet port 12h of the casing 10, a tub coupling portion 62 coupled to the periphery of the inlet of the tub 31, And an extension 63 extending between the casing coupling portion 61 and the tub engagement portion 62. [

The casing coupling portion 61 and the tub coupling portion 62 are each formed in an annular shape and the extension portion 63 is formed in an annular shape that is connected to the tub engagement portion 62 from an annular front end portion connected to the casing engagement portion 61, And a tubular shape extending from the front end portion to the rear end portion.

The front panel 12 is curled outward around the inlet 12h and the casing engagement portion 61 can be fitted in the concave portion formed by the curled portion. (See Figs. 11 to 13).

 The casing coupling portion 61 may be formed with an annular groove 61r through which a wire is wound. After the wire is wound along the groove 61r, both ends of the wire are engaged so that the casing engaging portion 61 is securely fixed around the charging port 12h.

The tub 31 is curled outward around the inlet, and the tub engagement portion 62 is fitted in the concave portion formed by the curled portion. 11 to 13). The tub engagement portion 62 may be formed with an annular groove 62r through which a wire is wound. After the wire is wound along the groove 62r, the both ends of the wire are engaged so that the tub engagement portion 62 is firmly engaged around the inlet of the tub 31. [

Meanwhile, the casing coupling portion 61 is fixed to the front panel 12, but the tub coupling portion 62 is displaced in accordance with the movement of the tub 31. Therefore, the extension portion 63 should be able to deform in response to the displacement of the tub engagement portion 62. The gasket 60 is moved by the eccentric movement of the tub 31 to the section between the casing engaging portion 61 and the tub engaging portion 62 (or the extending portion 63) (Or radial direction), the folded-back portion 65 can be formed.

 More specifically, the extended portion 63 is formed with a flat portion 64 that extends flat from the casing coupling portion 61 toward the tub engagement portion 62, and the folded portion 65 includes a flat portion 64 And may be formed between the tub engagement portions 62.

The gasket 60 is bent outward from the front end of the flat portion 64 and is fitted to the outer door close portion 68 which is in close contact with the rear surface of the door 20 from the outside of the inlet 12h in a state in which the door 20 is closed, . ≪ / RTI > The casing engaging portion 61 may have a groove 61r formed at a portion extending from the outer end of the outer door close portion 68. [

The gasket 60 is folded inwardly from the front end of the flat portion 64 so that the gasket 60 is bent inward from the rear surface (preferably, the window 22) of the door 20 inside the inlet port 12h, And an inner door contact portion 66 which is in close contact with the inner door contact portion 66.

 On the other hand, the drum 32 is caused to vibrate (i.e., the rotational center line C of the drum 32 is moved) in the course of the rotation so that the center line of the tub 31 (approximately the rotational center line C (Hereinafter, referred to as "eccentric direction") has a radial component.

 The folded-back portion 65 is folded or unfolded when the tub 31 moves in the eccentric direction. The folding portion 65 has an inner diameter portion 65a bent from the flat portion 64 toward the casing engaging portion 61 and an inner diameter portion 65b bent from the inner diameter portion 65a toward the tub engaging portion 62 to be engaged with the tub engaging portion 62 And an outer diameter portion 65b connected thereto. When the center of the tub 31 is moved in the eccentric direction, the inner diameter portion 65a and the outer diameter portion 65b are reduced at the portion of the folded-back portion 65, In the other portion spread, the gap between the inner diameter portion 65a and the outer diameter portion 65b is opened.

On the other hand, the gasket 60 may further include an annular protrusion 69 projecting from the outer diameter portion 65b. The projecting portion 69 has a smaller diameter than the tub engagement portion 62.

6 to 7, the gasket 60 includes a plurality of nozzles 610a, 610b, 610c, 610d, and 610e for spraying the circulating water into the drum 32. [ The plurality of nozzles 610a, 610b, 610c, 610d, and 610e may be formed in the inner peripheral portion of the gasket 60.

The guide pipe 70 is fixed to the gasket 60 by guiding the circulating water pumped by the pump 36 to the plurality of nozzles 610a, 610b, 610c, 610d and 610e.

The guide pipe 70 has an annular flow path 71 or a flow pipe for guiding the water supplied through the circulation pipe 18 and a plurality of nozzle water supply ports 72a and 72b projecting from the annular flow path 71 , 72c, 72d, 72e.

The annular flow path 71 is disposed around the outer periphery of the gasket 60 and is connected to the pump 36 through the circulation pipe 18. The respective nozzle water supply ports 72a, 72b, 72c, 72d and 72e protrude inward in the radial direction from the annular flow path 71 and pass through the gasket 60 to the corresponding nozzles 610a, 610b, 610c, 610d, and 610e.

The guide pipe 70 may include a circulation pipe connection port 75 protruded from the annular channel 71 and connected to the circulation pipe 18. The circulation pipe connection port 75 may protrude outward along the radial direction from the annular flow path 71.

The nozzles 610a, 610b, 610c, 610d and 610e are connected to a nozzle inlet pipe 611 (see FIGS. 11 to 13) protruding inwardly in the radial direction from the extension portion 63 of the gasket 60. And a nozzle head 612 connected to the nozzle inlet pipe 611. [

The nozzle inlet pipe 611 is formed with a port through hole at one end connected to the extension portion 763 and the other end connected to the corresponding nozzle 610a, 610b, 610c, 610d, and 610e.

The gasket 60 further includes a plurality of port insertion pipes 650a, 650b, 650c, 650d, and 650e protruding from the outer peripheral portion of the gasket 60 at positions corresponding to the plurality of nozzle inflow pipes 611 . Each of the port insertion tubes 650a, 650b, 650c, 650d and 650e communicates with a corresponding nozzle inlet pipe 611, and each of the nozzle water supply ports 72a, 72b, 72c, 72d, Are inserted into the tubes (650a, 650b, 650c, 650d, 650e). The circulating water discharged from the nozzle water supply ports 72a, 72b, 72c, 72d, and 72e is supplied to the nozzle head 612 through the nozzle inlet pipe 611. [

On the other hand, the nozzle water supply ports 72a, 72b, 72c, 72d, and 72e are inserted into the port insertion pipes 650a, 650b, 650c, 650d, and 650e to securely connect the guide pipe 70 to the gasket 60 The port insertion pipes 650a, 650b, 650c, 650d, and 650e and the nozzle water supply ports 72a, 72b, 72c, 72d, and 72e can be bound to each other by using a clamp (not shown). That is, the outer peripheral portions of the port insertion pipes 650a, 650b, 650c, 650d, and 650e are tightened by using the clamps so that the nozzle water supply ports 72a, 72b, 72c, 72d, 72e can be fixed so as not to be detached.

Each of the port insertion pipes 650a, 650b, 650c, 650d and 650e and the corresponding nozzle inflow pipe 611 extend substantially in the same line, and preferably the center O of the guide pipe 71 Lt; / RTI >

The plurality of nozzles 610a, 610b, 610c, 610d, and 610e includes an upper nozzle 610a that injects circulating water downward, a lower nozzle 610a that is disposed below the upper nozzle 610a, A pair of intermediate nozzles 610b and 610e which are arranged so as to be located at a lower side of the pair of intermediate nozzles 610b and 610e than the pair of middle nozzles 610b and 610e, And lower nozzles 610c and 610d.

Hereinafter, the configuration of the upper nozzle 610a described with reference to FIGS. 6, 7, and 11 may be applied to other nozzles 610b, 610c, 610d, and 610e.

6, 7 and 11, the upper nozzle 610a may be formed on the extension 63 of the gasket 60, and preferably protrudes from the inner peripheral surface of the outer diameter portion 65b.

Specifically, the nozzle inlet pipe 611 has a tubular shape, protrudes from the inner peripheral surface of the outer diameter portion 65b, and can be connected to the corresponding nozzle head 612.

The nozzle head 612 extends from the left side of the impact surface 612a and the right side of the impact surface 612a and extends along the impact surface 612a along with the impact surface 612a on which the water discharged from the nozzle water supply port 72a collides, And may include a left side 612b and a right side 612c that respectively define the left and right boundaries of the flowing stream.

The angle? Formed by the left side surface 612b and the right side surface 612c of the nozzle head 612 is approximately 45 degrees to 55 degrees, preferably 50 degrees, but is not necessarily limited thereto.

A plurality of projections 612d may be arranged in the lateral direction (or in the width direction of the water stream) at the end of the impact surface 612a, which is the outlet of the nozzle head 612, The water flow advancing along the impact surface 612a collides with the projection 612d and is then injected through the outlet. The water jetted through the nozzle head 612 passes through the protrusions 612d so that the jetted portion is thicker while the jetted portion after passing over the protrusion 612d is formed to be relatively thin, , And a thin water membrane extending between thick main stems.

On the other hand, the circulation pipe connection port 75 is connected to the annular flow path 71 below any one of the plurality of nozzles 610a, 610b, 610c, 610d, and 610e. Preferably, the circulation pipe connection port 75 is connected to the lowest point of the annular flow path 71.

That is, the annular channel 71 may be positioned at the lowest point of the inlet 71h through which the water flows from the circulation pipe connection port 75. The pair of intermediate nozzles 610b and 610e may be formed on the upper side of the inlet 71h and may be disposed on the left and right sides of the inlet 71h. The pair of intermediate nozzles 610b and 610e are arranged symmetrically with respect to the vertical line OV passing through the center O of the annular flow path 71 (see Fig. 6), and thus the respective middle nozzles 610b and 610e ) Is also symmetrical with respect to the vertical line (OV).

A pair of intermediate nozzles 610b and 610e may be positioned above the center O of the guide tube 71 (note that OH shown in Fig. 6 is a horizontal line passing through the center O). When the drum 32 is viewed from the front, the circulating water is larger than the center C of the drum 32 at the inlet side of the drum 32 because the intermediate nozzles 610b and 610e spray the circulating water downward. And is injected in a downwardly inclined form as it penetrates deeply into the drum 32.

The pair of lower nozzles 610c and 610d are arranged above the inlet 71h but below the pair of intermediate nozzles 610b and 610e. The pair of lower nozzles 610c and 610d may be disposed on the left and right sides of the inlet 71h and preferably symmetrically with respect to the vertical line OV so that the lower nozzles 610c, 610d are symmetrical with respect to the vertical line OV.

The pair of lower nozzles 610c and 610d may be positioned below the center O of the guide tube 71. [ When the drum 32 is viewed from the front, the circulation water is lower than the center C of the drum 32 at the inlet side of the drum 32, because each of the lower nozzles 610c and 610d injects the circulating water upward. And is injected in an upward inclined form as it penetrates deeply into the drum 32.

The top nozzle 610a is preferably disposed on a vertical line OV and the shape of the circulating water injected through the top nozzle 610a is symmetrical with respect to the vertical line OV.

On the other hand, the annular flow path 71 may include a plurality of raised portions 717a, 717b, 717c, 717d, and 717e which are convex outwardly in the radial direction as compared with the peripheral portion. The protrusions 717a, 717b, 717c, 717d, and 717e may be formed at positions corresponding to the plurality of nozzle inflow pipes 611, and are convex in a direction away from the outer peripheral portion of the gasket 60. [ The nozzle water supply ports 72a, 72b, 72c, 72d and 72e may protrude from the respective ridges 717a, 717b, 717c, 717d and 717e.

6 and 9, the ridges 717a, 717b, 717c, 717d, and 717e include upper nozzles 610a, a pair of intermediate nozzles 610b and 610e, and a pair of lower nozzles 610c, The first ridge portion 717a, the third ridge portion 717b, the third ridge portion 717c, the fourth ridge portion 717b, and the fourth ridge portion 717c, The first ridge 717d, and the fifth ridge 717e. 713, 714, 715 and 716 corresponding to the section between the protrusions 717a, 717b, 717c, 717d and 717e are respectively connected to the first connection part 711, the second connection part 712, Third connecting portions 713 and 714, fourth connecting portion 715, and fifth connecting portion 716, respectively.

Here, the third connecting portions 713 and 714 are located between the outer peripheral portion of the gasket 60 and the lower vane lance 83. The third ridge 717c is disposed between the first upper balancer 81 and the lower balancer 83 and the fourth ridge 717d is disposed between the second upper balancer 82 and the lower balancer 83 . When the interval between the lower balancer 83 and the outer peripheral portion of the gasket 60 is narrow and the third raised portion 717c and the fourth raised portion 717d are difficult to be disposed, And the third raised portion 717c and the fourth raised portion 717d are disposed between the lower balancer 83 and the upper balancers 81 and 82 so as to prevent the guide tubes 70 Thereby facilitating the mounting.

10, the cross-section of the annular flow path 71 can have an outer shape defined by a radial direction, which is shorter than a width defined by the longitudinal direction of the gasket 60 (or front-rear direction of the washing machine). Due to such a structure, the annular flow path 71 can be provided within a narrow space between the gasket 60 and the balances 81, 82, 83.

The cross section of the inner space formed by the annular flow path 71 (that is, the space through which the circulating water is guided) can also be formed in a shape in which the height h is shorter than the width d.

The inner end surface of the annular flow path 71 (that is, the end surface of the inner space formed by the annular flow path 71) can be formed so that the annular shape gradually decreases in area from the lower part to the upper part of the flow path 71 have. Since the height from the pump 36 increases toward the upper portion of the annular flow path 71, the width of the inner end surface at the upper portion than the lower portion of the annular flow path 71 is reduced for water pressure compensation. The cross section SA and the cross section SB shown in FIG. 10 (b) show the inner cross section of the annular flow path 71 at points A and B shown in FIG. 10 (a) The width d (A) of the section at the point is shorter than the width d (B) of the section at the point B. (d (A) < d (AB) < d (B)

On the other hand, the circulating water supplied through the circulation pipe 18 flows into the guide pipe 71 through the circulation pipe connecting port 75, is branched on both sides and rises along the flow path, Spraying takes place. The operating pressure of the pump 36 can be controlled to such an extent that the pressurized water can reach the upper nozzle 610a.

On the other hand, the control unit controls the speed of the pump motor to discriminate the jetting pressures of the nozzles 610a, 610b, 610c, 610d and 610e. As one embodiment of this injection pressure control, the speed of the pump motor can be variably controlled within a range in which injection is simultaneously performed by all of the nozzles 610a, 610b, 610c, 610d, and 610e. A filtration motion in which the laundry is rotated together with the drum 32 while the laundry is adhered to the inner surface of the drum 32 while the circulating water is sprayed by the nozzles 610a, 610b, 610c, 610d, Can be implemented.

The filtration motion may be performed a plurality of times. The acceleration of the pump motor can be synchronized with the execution time of each of the filtration motions and the deceleration can be synchronized with the time of braking the drum 32 for the end of each filtration motion.

That is, when the drum 32 starts to accelerate for the filtration motion, the pump motor is also accelerated so that the laundry is completely attached to the drum 32 and rotated together with the drum 32 610d, 610c, 610d, and 610e can be maximized in a state where the centrifugal force is larger than the gravity so that the laundry does not fall even when the laundry reaches the peak due to the rotation. When the rotational speed of the pump motor is maximized while the filtration motion is being performed, the circulating water jetted from the nozzles 610a, 610b, 610c, 610d, and 610e reaches deepest into the drum 32, 610c, and 610d, which are circulated through the intermediate nozzles 610b and 610e, to the deepest portion of the drum 32.

6, intermediate nozzles 610b and 610e form an angle? 1 with respect to the upper nozzle 610a with respect to the center O of the guide pipe 71 or the center of the gasket 60, 610c and 610d form an angle? 2 with the middle nozzles 610b, 610e,? 1 can be between about 50 and 60 degrees, and preferably 55 degrees as shown in Figure 6, It is not. Also,? 2 is about 50 to 65 degrees, preferably 55 degrees as shown in FIG. 6, but it is not necessarily limited thereto.

The gasket 60 may be provided with a direct water nozzle 42 (see FIG. 2). The direct water nozzle 42 injects water (that is, direct water) supplied from an external water source (for example, a faucet) into the drum 32. The flat portion 64 of the gasket 60 may be provided with a first installation pipe 61c (see FIG. 11) in which a direct water nozzle 42 is installed.

The gasket 60 may be provided with a steam injection nozzle (not shown). The washing machine according to an embodiment of the present invention may include a steam generator (not shown) for generating steam. The steam nozzle injects steam generated by the steam generator into the drum 32. The flat portion 64 of the gasket 60 may be provided with a second installation pipe 61d (see FIG. 11) in which the steam nozzle is installed. On the other hand, contrary to the embodiment, it is also possible that the steam nozzle is installed in the first installation pipe 61c and the direct water nozzle 42 is installed in the second installation pipe 61d.

14 is a partial view of a washing machine to which a guide tube according to another embodiment of the present invention is applied.

The guide tube 70a according to another embodiment of the present invention is configured such that the structure of the protrusions 717c and 717d and the connection portions 711 ', 712, 713, 714, and 715' constituting the annular flow path 71 And the guide tube 70 according to the above-described embodiment. Hereinafter, the same reference numerals are assigned to the same components as those in the above-described embodiment, and description thereof will be omitted herein.

The annular guide pipe 70a is formed with raised portions 717c and 717d at positions corresponding to the pair of lower nozzles 610c and 610d respectively, The raised portions are formed at positions corresponding to the nozzles 610b and 610c. The connecting portions 711 ', 712, 713, 714, and 715' are disposed substantially on a predetermined circumference, and the ridges 717c and 717d protrude outward along the radial direction from the circumference.

The gap between the upper balancers 81 and 82 and the outer periphery of the gasket 60 may be larger than the gap between the lower balancer 83 and the outer periphery of the gasket 60 The distance between the upper balancers 81 and 82 and the outer peripheral portion of the gasket 60 is sufficiently long so that the port inserting pipes 650a, 650b and 650e can be disposed within the gap, but the lower balancers 83 and The gap between the outer peripheral portions of the gasket 60 is relatively narrow, so that the port insertion pipes 650c and 650d can not be arranged.

In this case, even if the raised portions 717c and 717d are formed only at the positions corresponding to the lower nozzles 610c and 610d, the connecting portions 713 and 714 between the raised portions 717c and 717d, And the protrusions 717c and 717d are disposed between the upper balancers 81 and 82 and the lower balancer 83 so that the guide pipes 70a and 70b are disposed between the lower balancer 83 and the outer periphery of the gasket 60, ) Can be installed.

On the other hand, g, which is not illustrated, is a gap formed between the connecting portions 711 'and 715' and the outer peripheral portion of the gasket 60.

Claims (15)

A casing having a charging port formed therein for charging the laundry;
A tub disposed in the casing and containing washing water and having a front surface communicating with the inlet;
A drum rotatably disposed in the tub, the laundry containing laundry;
A pump for feeding water discharged from the turbine;
A gasket having a plurality of nozzles at an inner peripheral portion thereof for communicating the inlet of the tub with the inlet of the tub and injecting water into the drum; And
And a guide pipe fixed to the gasket and guiding the water pumped by the pump to the plurality of nozzles,
The guide tube
An annular oil flow passage provided around the outer periphery of the gasket and through which water pumped by the pump flows; And
And a plurality of nozzle water supply ports each protruding from the annular flow passage and passing through the gasket and supplying the water guided through the annular flow passage to the plurality of nozzles, respectively. The method according to claim 1,
In the gasket,
A casing coupling portion coupled to an inlet of the casing;
A tub engaging portion coupled to an inlet of the tub; And
And an extension extending between the casing engagement portion and the tub engagement portion,
Wherein each of the nozzles comprises:
A nozzle inlet pipe projecting from the inner circumferential surface of the extended portion and introducing water through the nozzle water supply port; And
And a nozzle head for spraying water supplied through the nozzle inlet pipe into the drum. 3. The method of claim 2,
In the gasket,
Further comprising a plurality of port insertion tubes projecting from the outer circumferential surface of the extension portion and communicating with the inlet pipes of the plurality of nozzles respectively,
Wherein the plurality of nozzle water supply ports include:
And inserted into the plurality of port insertion tubes. The method of claim 3,
The annular passage
And a plurality of raised portions projecting in a direction away from an outer peripheral portion of the gasket at positions corresponding to the plurality of port insertion tubes,
Wherein the plurality of nozzle water supply ports include:
And projecting from the plurality of ridges, respectively. 5. The method of claim 4,
On the front surface of the tub,
A plurality of balancers having a predetermined weight are disposed along an inlet of the tub,
Wherein the ridge portion is disposed between the plurality of balancers. 3. The method of claim 2,
The extension
A flat portion extending flat from the casing engagement portion toward the tub engagement portion; And
And a folded portion formed between the flat portion and the tub engagement portion and folded in accordance with the displacement of the tub,
The folded-
An inner diameter portion bent toward the casing coupling portion from the flat portion; And
And an outer diameter portion bent from the inner diameter portion toward the tub engagement portion side,
Wherein the plurality of nozzle inflow pipes comprise:
And protrudes from the inner peripheral surface of the outer diameter portion. The method according to claim 1,
The cross-section of the annular flow path,
The height defined in the radial direction is shorter than the width defined in the longitudinal direction of the gasket. The method according to claim 1,
Further comprising at least one balancer having a predetermined weight disposed along an inlet of the tub,
The annular passage
Wherein the gasket is disposed between the gasket and the at least one balancer. The method according to claim 1,
Wherein an inner end surface of the annular passage
Wherein the area of the annular flow passage gradually decreases from the lower portion to the upper portion. 10. The method of claim 9,
Wherein an inner end surface of the annular passage
Wherein the width of the annular flow passage gradually decreases from the lower portion to the upper portion of the annular flow passage. The method according to claim 1,
Further comprising a circulation pipe for guiding water pumped by the pump,
The guide tube
And a circulation pipe connection port protruding outwardly from the annular channel and connected to the circulation pipe. The method according to claim 1,
Wherein the plurality of nozzles comprises:
An upper nozzle for spraying water downward;
A pair of intermediate nozzles disposed on the lower side of the upper nozzle and disposed on both sides of the inlet port of the annular flow path through which the water supplied by the pump flows, And
And a pair of lower nozzles disposed on the lower side of the intermediate nozzle and disposed on both sides with respect to the inflow port. 13. The method of claim 12,
Wherein the pair of intermediate nozzles are disposed above the center of the annular flow path. 13. The method of claim 12,
Wherein the pair of lower nozzles are disposed below the center of the guide tube. The method according to claim 1,
Wherein the pump is capable of speed control.

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