TWI689643B - washing machine - Google Patents

Abstract

The washing machine of the present disclosure includes: a storage tank for storing laundry; a foam generating section provided in the storage tank to supply the generated foam into the storage tank; a water supply channel provided in the storage tank to supply the washing liquid to foam generation Circulation water channel, installed in the storage tank, so that the washing liquid in the storage tank circulates in the storage tank; and circulation pump, the washing liquid in the storage tank is supplied to the foam generating part and the circulating water channel. The water supply channel and the circulation water channel are arranged to overlap in the axial direction of the storage tank. Thereby, a washing machine with a high washing power can be realized without damaging the opening area of the inlet of the laundry.

Description

washing machine

The present disclosure relates to a washing machine that performs a washing step, a rinsing step, and a dehydrating step.

Background of the invention

In Patent Document 1 (Japanese Patent Laid-Open No. 2011-250921), there has been proposed a washing machine having a function of circulating washing water in a water tank with a circulation pump and rotating the washing water from a plurality of nozzles to a rotating drum The laundry inside is supplied without missing.

Thereby, in the washing step, the lotion can be quickly dissolved to make it permeate into the clothes, and the dirt of the clothes can be efficiently removed.

In Patent Document 2 (Japanese Patent Laid-Open No. 2015-43798), there has been proposed a technical solution for a washing machine that circulates washing water stored in a water tank with a circulation pump, and introduces air into a water channel to generate foam.

In this way, the foamy washing water in which the lotion has been dissolved can be spread on the laundry, and as the volume of the lotion increases, the high-concentration lotion components (mainly surfactants) can be spread to Every corner of the laundry. As a result, the dirt of the clothes can be removed efficiently.

A washing machine that has both the function of supplying washing water to laundry as described in Patent Document 1 and the function of supplying foam to laundry as described in Patent Document 2 has been urgently required.

Summary of the invention

The washing machine of the present disclosure is provided with: a storage tank for storing laundry; soaking The foam generating part is provided in the storage tank to supply the generated foam into the storage tank; the water supply channel is provided in the storage tank to supply the washing liquid to the foam generation unit; the circulation water channel is provided in the storage tank to make the The washing liquid circulates in the containing tank; and the circulation pump supplies the washing liquid in the containing tank to the foam generating part and the circulating water channel. The water supply channel and the circulation water channel are arranged to overlap in the axial direction of the storage tank.

The washing machine of the present disclosure can supply foam and detergent liquid into the storage tank with a simple structure, and efficiently wash the laundry.

100: washing machine

101: door leaf

200: main enclosure

210: front wall

220: rear wall

230: left wall

240: right wall

250: top wall

260: bottom wall

300: Control Department

400: water supply organization

410: Water supply port

420: switching valve

421: 1st water supply path

422: 2nd water supply path

430: Lotion containment department

500: washing mechanism

510: containment tank

511: input port

520: Motor

521: Body part

522: Drive shaft

523: belt

524: Block

530: Rotating drum

531: Inner ring wall

532: Inner bottom wall

533: Inner peripheral wall

540: sink

541: Outer ring wall

542: Outer bottom wall

543: outer peripheral wall

544: Cover

545: Anterior peripheral wall

546: Posterior wall

545, 546, 547, 548: pad

600: circulation mechanism

610: Loop pump

611: 1st circulation path

612: 2nd cycle path

620: Foam generation department

621: partition wall

621a: Opposite face

621b: inclined surface

622: Water supply

623: bracket

640: upstream circulation pipe

650: downstream circulation pipe

651: 1st manifold

652: 2nd manifold

660: Drain

681: Inflow

682: Spit out

683: Suction port

684: foam outlet

690: Drain valve

810: circulating waterway

811: Spit

812: dividing wall

900: cover

930: Clamp shape

A, B: direction of rotation

A910, B920: spit outlet

RX: rotary axis

10: Washing

FIG. 1 is a block diagram of an outline of a washing machine in Embodiment 1 of the present disclosure.

FIG. 2 is a schematic perspective view of the washing machine.

Fig. 3 is a cross-sectional view showing the outline of the washing machine.

Fig. 4 is a schematic perspective view of the washing machine.

Fig. 5 is a schematic plan view of the washing machine.

6 is a schematic cross-sectional view of the washing machine.

7 is a schematic plan view of the washing machine.

Fig. 8 is a schematic perspective view of the foam generating part of the washing machine.

Fig. 9 is a schematic view of a cover of the circulation pump of the washing machine.

The first aspect includes: a storage tank for storing laundry; a foam generating part provided in the storage tank to supply the generated foam into the storage tank; and a water supply channel provided in the storage tank to supply the washing liquid to the foam generating unit ; Circulation water channel, installed in the storage tank, so that the cleaning liquid in the storage tank circulates in the storage tank, and the circulation pump, the cleaning liquid in the storage tank is supplied to the foam generating part and the circulating water channel. The water supply channel and the circulation water channel are arranged to overlap in the axial direction of the storage tank. Thereby, a washing machine with a high washing power can be realized without damaging the opening area of the inlet of the laundry.

The second aspect is in the first aspect, on the back surface of the outer ring wall constituting the housing groove A bracket for forming a foam generating portion and a water supply channel between the outer ring wall and the outer wall is arranged. A cover body covering the back of the outer ring wall and the bracket is arranged. A circulation water channel is arranged between the back surface of the plastic outer ring wall and the cover body and between the holder and the cover body.

In the third aspect, in the first or second aspect, the foam generating portion is disposed at a position where the foam supplied from the foam generating portion to the storage tank does not collide with the washing liquid supplied from the circulating water channel to the storage tank. The foam outflow part and the discharge port of the circulating water channel.

Hereinafter, the exemplary washing machine will be described with reference to the drawings. In addition, the terms used in the following description to indicate directions such as "upper", "lower", "left", and "right" are only intended to clarify the description. Therefore, these terms are not used to define any principle of the washing machine. The washing machine disclosed below is exemplified by a washing machine that does not have a drying function, but it may also be a laundry processing device having a drying function for drying laundry.

(First embodiment) (washing machine)

FIG. 1 is a block diagram of the outline of the washing machine 100 according to the first embodiment. 1, the washing machine 100 will be described. In addition, the solid arrow shown in FIG. 1 shows the flow direction of water. The dotted arrow shown in FIG. 1 indicates the transmission path of the control signal.

The washing machine 100 includes a main cabinet 200, a control unit 300, a water supply mechanism 400, a washing mechanism 500, and a circulation mechanism 600. The main casing 200 houses the control unit 300, the water supply mechanism 400, the washing mechanism 500, and the circulation mechanism 600. The control unit 300 controls the water supply mechanism 400, the washing mechanism 500, and the circulation mechanism 600.

The washing machine 100 may sequentially perform a washing step for washing the laundry 10, a washing step for washing the laundry 10, and a dehydration step for dehydrating the laundry 10.

The washing mechanism 500 includes a storage tank 510 for storing the laundry 10 and a motor 520 that drives the storage tank 510. The motor 520 drives the storage tank 510 under the control of the control unit 300. In the cleaning step, the storage tank 510 stirs the laundry 10 in the liquid containing the detergent. As a result, the laundry 10 can be washed appropriately. in In the rinsing step, the storage tank 510 agitates the laundry 10 in water having a lower detergent concentration than the washing step. In addition, in the rinsing step, water is repeatedly supplied to the storage tank 510 and drained from the storage tank 510. As a result, the detergent is appropriately removed from the laundry 10. In the dehydration step, the storage tank 510 dehydrates the laundry 10 by centrifugal force. As a result, drying of the laundry 10 can be promoted.

The water supply mechanism 400 supplies water to the storage tank 510 during the washing step and the washing step described above. The water supply mechanism 400 includes a water supply port 410 connected to a faucet, a switching valve 420, and a detergent storage portion 430 that stores detergent. The water supplied to the water supply port 410 reaches the switching valve 420. The switching valve 420 switches the water supply path between the first water supply path 421 that directly flows water to the storage tank 510 and the second water supply path 422 that supplies water to the storage tank 510 through the detergent storage unit 430. The first water supply path 421 may be used in, for example, a washing step. As a result, tap water can be directly supplied to the storage tank 510. The second water supply path 422 can also be used in, for example, a washing step. When the switching valve 420 opens the second water supply path 422, water flows into the lotion storage portion 430. In the lotion accommodating part 430, water and lotion are mixed. As a result, water containing detergent flows into the storage tank 510. In this embodiment, the piping defining the second water supply path 422 is exemplified as the water supply pipe. The water supply mechanism 400 is exemplified as the water supply unit.

The circulation mechanism 600 includes a circulation pump 610 and a foam generating unit 620. The circulation mechanism 600 may circulate water between the circulation pump 610 and the storage tank 510 in the above-mentioned washing step and washing step. In the present embodiment, the circulation mechanism 600 is provided with a first circulation path 611 and a second circulation path 612 for circulation of water between the circulation pump 610 and the storage tank 510. When the first circulation path 611 is used, water flows into the storage tank 510 through the foam generating portion 620. When the second circulation path 612 is used, water is directly sent to the storage tank 510 by the circulation pump 610. In order to switch the circulation path of water, a switching valve and other elements that can selectively define the flow direction of water may be used. In the present disclosure, in order to efficiently supply foam and lotion liquid in a short time with a simple structure and obtain high washing The water is supplied to the first circulation path 611 and the second circulation path 612 at the same time. Moreover, since the water is sent to the foam generating part 620 and the storage tank 510 by a single circulation pump 610, the space in the main casing 200 can be effectively used, and the washing machine 100 can be manufactured at a low price . In addition, the use of a single circulating pump 610 can also be attributed to the increase in the degree of freedom of layout design in the main casing 200.

The foam generating unit 620 generates foam. The lotion liquid whose volume is increased due to foam will be transferred to the storage tank 510 and spread over the laundry 10. When the detergent liquid contacts and soaks into the laundry 10, the foam becomes a foam film and covers the laundry 10. Since the foam film contains a high concentration of surfactant, it is possible to efficiently remove the dirt of the laundry 10. In addition, by simultaneously discharging the detergent liquid into the storage tank 510 through the second circulation path 612, the wettability of the laundry 10 is improved, and the detergent liquid is not unevenly poured on the laundry 10. With this, as the penetration strength of the foam with high concentration is increased, a high washing power can be obtained in a short time.

FIG. 2 is a schematic perspective view of the washing machine 100. The washing machine 100 will be described further with reference to FIGS. 1 and 2.

The main housing 200 includes a front wall 210; a rear wall 220 opposite to the front wall 210; a left wall 230 erected between the front wall 210 and the rear wall 220; a right wall 240 opposite to the left wall 230; The top wall 250 surrounded by the upper edges of the front wall 210, the rear wall 220, the left wall 230, and the right wall 240; and the bottom wall 260 opposite to the top wall 250. The water supply port 410 described with reference to FIG. 1 is exposed on the top wall 250. The user can, for example, use a water pipe to connect the water supply port 410 to a faucet (not shown).

The washing machine 100 includes a door leaf 101 attached to the front wall 210. The door leaf 101 rotates between a closed position along the front wall 210 and an open position protruding from the front wall 210. Furthermore, the door leaf body 101 shown in FIG. 2 is kept in the open position. When the door leaf body 101 is kept in the open position, the input port 511 defined by the storage slot 510 is exposed. The user can turn the door leaf body 101 to the open position, and put the laundry 10 into the storage tank 510 through the loading port 511.

FIG. 3 is a schematic cross-sectional view of the washing machine 100. 1 and 3, the washing machine 100 will be further explained. In the following description, as shown in FIG. 3, the sides of the storage tank 510 where the inlet 511 is formed are defined as the front side of the washing machine 100, and the depth side of the storage tank 510 is defined as the rear side of the washing machine 100.

The storage tank 510 includes a rotary drum 530 that stores laundry 10 and a water tank 540 that stores the rotary drum 530. The rotating drum 530 includes an inner ring wall 531 defining the inlet 511, an inner bottom wall 532 opposite to the inner ring wall 531, and a cylindrical inner peripheral wall 533 between the inner ring wall 531 and the inner bottom wall 532. The water tank 540 includes an outer ring wall 541 disposed between the front wall 210 and the inner ring wall 531, an outer bottom wall 542 disposed between the rear wall 220 and the inner bottom wall 532, and the outer ring wall 541 and the outer bottom wall 542 The outer peripheral wall 543 surrounding the inner peripheral wall 533 therebetween. In this embodiment, the rotary drum 530 is exemplified as the inner tank. The water tank 540 is exemplified as the outer tank.

The motor 520 includes a body portion 521 that generates driving force, a drive shaft 522 that transmits the driving force to the rotary drum 530, a belt 523 that transmits the rotation of the body portion 521 to the drive shaft 522, and a trolley 524. The driving shaft 522 will pass through the outer bottom wall 542 and be connected to the inner bottom wall 532.

In addition to the circulation pump 610 and the foam generating part 620 (refer to FIG. 1), the circulation mechanism 600 also includes a drain valve 690, an upstream circulation pipe 640 that defines a path of water flowing from the water tank 540 to the circulation pump 610, and a circulation pump The downstream circulation pipe 650 of the path of the water returned by the pump 610 to the water tank 540, and the drain pipe 660 that defines the drain path to the outside of the main casing 200. The drain valve 690 is installed on the drain pipe 660. The control unit 300 (see FIG. 1) controls the drain valve 690. During the circulation of water between the storage tank 510 and the circulation pump 610, the control unit 300 closes the drain valve 690. The control unit 300 opens the drain valve 690 in order to discharge unnecessary water.

The downstream circulation pipe 650 includes a first manifold 651 connected to the foam generating part 620 and a second manifold 652 connected to the outer ring wall 541. The first manifold 651 defines the first circulation path 611 described with reference to FIG. 1. The second manifold 652 defines the second circulation path 612 described with reference to FIG. 1. The control unit 300 can also control the circulation pump The rotation direction and the rotation number of 610 selectively perform the circulation of water passing through the first manifold 651 and the circulation of water passing through the second manifold 652. In this embodiment, the downstream circulation pipe 650 is exemplified by the circulation pump 610 as a branch pipe.

FIG. 4 is a schematic perspective view of the water tank 540. The washing machine 100 will be further described with reference to FIGS. 1, 3 and 4.

The outer peripheral wall 543 of the water tank 540 includes a front peripheral wall 545 to which the outer ring wall 541 is attached, and a rear peripheral wall 546 disposed between the outer bottom wall 542 and the front peripheral wall 545. The foam generating part 620 is arranged on the front peripheral wall 545. FIG. 3 shows the rotation axis RX of the rotary drum 530 defined by the motor 520.

In this embodiment, the foam generating part 620 is arranged above the rotation axis RX. In addition, the foam outlet 684 that discharges high-density foam is also arranged above the rotation axis RX. The discharge portion 811 and the foam outlet 684 of the detergent liquid discharged at the same time as the foam are arranged so that the high-concentration foam does not collide with the detergent liquid phase, and the discharge amount of the detergent liquid and the foam is set.

In the present embodiment, the first manifold 651 of the downstream circulation pipe 650 is exemplified as a structure that is connected to the front peripheral wall 545 of the water tank, passes through the internal circulation path in the front peripheral wall 545, and reaches the foam generating portion 620. As a result, the space in the main housing 200 can be effectively used, and the washing machine 100 can be manufactured at a low cost. In addition, the result of the increase in the degree of freedom of the layout design in the main housing 200 is also attributed.

(Foam generation department)

FIG. 5 is a plan view of the outer ring wall 541 seen from the back side. 6 is a cross-sectional view of the outer ring wall 541 part. FIG. 7 is a plan view of the upper body portion with the cover 544 removed from FIG. 5. FIG. 8 is a schematic perspective view of the foam generating part 620. Hereinafter, the foam generating unit 620 will be described with reference to FIGS. 3 to 8.

The outer ring wall 541 of the water tank 540 has a shape that swells toward the front. The back side of the outer ring wall 541 is provided with a foam generating section 620, a water supply path 622 to the foam generating section 620, and a circulation water path 810 that supplies wash water to the storage tank 510. foam The generating unit 620 and the water supply channel 622 are partitioned by a partition wall 621 formed by protruding from the back side of the outer ring wall 541 (see FIG. 8 ). The foam generating part 620 and the water supply channel 622 are formed by contacting the holder 623 to the partition wall 621, and surrounded by the back surface of the outer ring wall 541, the partition wall 621, and the holder 623 (see FIG. 6). The watertight structure between the partition wall 621 and the bracket 623 may be provided as required.

The water supply channel 622 is provided with an inflow port 681 (see FIG. 7) at the end opposite to the foam generating unit 620. The other end side of the water supply channel 622 is provided with a discharge port 682 (see FIG. 7 ). The discharge port 682 is formed in the horizontal direction (including the substantially horizontal direction) toward the foam generating portion 620. In addition, the cross-sectional area of the discharge port 682 is configured to be smaller than the cross-sectional area of the water supply channel 622, and the flow velocity of the washing water sprayed toward the foam generating unit 620 through the water supply channel 622 is increased. In the discharge direction of the washing water discharged from the discharge port 682, a facing surface 621a (see FIG. 8) formed as a part of the partition wall 621 and formed in the vertical direction (including the substantially vertical direction) is provided.

A suction port 683 is formed on the side of the bracket 623, and the suction port 683 is located in the middle of the discharge port 682 and the opposing surface 621a (including the approximate middle) (FIG. 8 is a plan view of the bracket 623 in perspective, and in FIG. 8 The picture shows the suction port 683).

The foam generating part 620 includes a foam outlet 684 at a position facing the discharge port 682. An inclined surface 621b formed toward the foam outlet 684 is provided on the outer wall surface constituting the foam generating portion 620 (see FIG. 8). As a result, the washing water supplied into the foam generating unit 620 can be discharged from the foam outlet 684 without remaining in the foam generating unit 620.

The first manifold 651 described with reference to FIGS. 3, 4, 5, 7, and 8 is connected to the inflow port 681 through the internal circulation path in the front peripheral wall 545 of the water tank 540. When the circulation pump 610 pumps the lotion liquid to the foam generating part 620, the detergent liquid flowing in through the inlet 681 passes through the water supply channel 622 and is discharged from the discharge port 682 toward the foam generating part 620.

In the foam generating part 620, when the lotion liquid is discharged from the discharge port 682 toward the foam generating part 620, the lotion liquid is caused to collide with the opposing surface 621a. then, The lotion liquid is scattered on each surface of the foam generating part 620 and mixed with the air in the foam generating part 620. As a result, foam with a high concentration is generated. In addition, the liquid in the water tank 540 can be sucked from the suction port 683 because the lotion liquid is discharged from the discharge port 682 and becomes negative pressure near the foam generating portion 620 side of the suction port 683. The lotion liquid can be more mixed with air bubbles by entraining air, and it becomes possible to generate a larger amount of high-concentration foam. In addition, since the lotion liquid discharged from the discharge port 682 can be configured to increase the flow velocity and collide toward the opposing surface 621a, it is possible to efficiently generate bubbles inside the foam generating portion 620.

The lotion liquid increased in volume by the air bubbles is scattered on the laundry 10 from the foam outlet 684 in the state where the rotary drum 530 rotates and agitates the laundry 10, so it can be evenly dispersed in洗物10上。 Wash 10 on. The diameter of the foam outflow port 684 can be adjusted to a flow rate at which bubbles can be mixed in the foam generation part according to the amount of water pumped. The flow rate can also be adjusted by the number of rotations of the circulating pump.

In this embodiment, the partition wall 621 and the component parts of the housing groove 510 can be formed integrally to form a smaller type, so that the structure can be simplified.

In addition, the water supply path 622 may be any structure as long as it can supply the lotion liquid to the foam generating portion 620, and can be configured by, for example, a water pipe or the like in addition to the form of the present embodiment.

(Circulating water path)

FIGS. 5, 7 and 8 show the water supply channel 622 of the detergent solution to the foam generating unit 620, the foam outlet 684 of high-concentration foam, the circulation water channel 810 for supplying the detergent solution to the storage tank 510, and Disposition of the discharge unit 811.

An annular cover 544 is installed on the back side of the outer ring wall 541 so as to cover the holder 623 and the circulating water channel 810 (see FIG. 5 ). The circulation water channel 810 is partitioned by a partition wall 812 formed protruding from the back side of the outer ring wall 541. The cover body 544 abuts the back surface of the outer ring wall 541 and the partition wall through the gaskets 545 and 546 At 812, the circulating water channel 810 is formed by being surrounded by the back of the outer ring wall 541, the partition wall 812, and the cover 544.

7 is a cross-sectional view at a position where the water supply channel 622 and the circulating water channel 810 are formed. The circulating water channel 810 at this position is to make the cover body 544 abut on the outer ring wall 541, the partition wall 621 and the bracket 623 through the gaskets 545, 546, 547, 548, and the covered body 544 and the bracket 623 surrounded and formed.

As described above, in the present embodiment, the water supply channel 622 and the circulating water channel 810 are arranged to overlap in the axial direction of the storage tank 510. More specifically, as shown in FIG. 6, the water supply channel 622 is arranged on the front side of the circulation water channel 810. With this configuration, compared with the case where the water supply channel 622 and the circulation channel 810 are arranged side by side in the direction perpendicular to the axial direction of the storage tank 510, the opening area of the inlet of the laundry 10 can be increased. In addition, the present disclosure is not limited to the above-mentioned form, and the water supply channel 622 may be disposed on the rear side of the circulation water channel 810.

The foam outlet 684 for high-density foam is arranged above the rotating shaft RX, so that the high-density foam is spread from above the laundry 10. In addition, the lotion liquid discharged at the same time is discharged into the storage tank 510 from the discharge unit 811 via the second manifold 652 and through the circulating water channel 810. The circulation water channel 810 and the discharge part 811 are provided in front of the storage tank 510.

In the present embodiment, when high-density foam is discharged, it is controlled so that the detergent water discharged by the discharge unit 811 is discharged only substantially below the rotation axis RX. This is a control for avoiding collision of high-concentration foam with the liquid phase of the lotion, defoaming the foam and reducing the cleaning effect of the foam.

In addition, the circulation water channel 810 and the discharge part 811 of the lotion liquid are arranged up to the upper part. The reason is that when the circulation pump 610 rotates in the rotation direction B for the purpose of circulating the lotion liquid, the circulating water is contained The entire area in front of the groove 510 is discharged.

As shown in FIGS. 4, 5, and 7, the circulation pump 610 is configured The groove 510 is further below. The foam generating part 620 is arranged above the rotation axis RX of the rotary drum 530 (that is, above the circulation pump 610). When the circulation pump 610 rotates, water is pumped by the circulation pump 610 through the first manifold 651 and toward the foam generating portion 620.

When the circulating pump 610 rotates at a higher rotation number, the lotion liquid flows into the first manifold 651 and the second manifold 652. The first manifold 651 guides the lotion liquid to the foam generating part 620. The foam generated in the foam generation unit 620 is sent to the storage tank 510.

When the circulating pump 610 rotates at a higher rotation number, the lotion liquid flows into the first manifold 651 and the second manifold 652. The first manifold 651 guides the lotion liquid to the foam generating part 620. The foam generated in the foam generation unit 620 is sent to the storage tank 510. The second manifold 652 guides water directly to the water tank 540. The inflow path of the lotion liquid is selected by controlling the rotation direction of the circulation pump 610.

(Circulation pump cover)

FIG. 9 is a diagram showing the shape of a circulating pump cover 900 used as a driving measure for generating high-concentration foam and for supplying a lotion solution to a storage tank.

The rotation direction A of the impeller is the rotation direction when the high-concentration foam is generated and the lotion liquid is supplied downward, and the rotation direction B is the rotation direction when the lotion liquid is supplied to the entire area of the storage tank.

When the high-concentration foam is generated in the rotation direction A, the circulating water is discharged from the pump casing outlet A910 and the casing outlet B920 at a ratio of approximately 1:1. Thereby, while the foam generating part 620 generates high-concentration foam, the lotion liquid can be discharged from the discharge part 811 of the lotion liquid. In this case, at least the cross-sectional area of the discharge port may be set to the relationship of the case discharge port A910 (foam generation side)≦case discharge port B920 (lotion liquid side). In addition, a tongs shape 930 for attracting water relative to the rotation of the impeller may be provided before the discharge port of the casing.

The washing machine of the present disclosure can be suitably used on a device that has a function of using foam to wash laundry.

541‧‧‧Outer ring wall

610‧‧‧Circulation pump

620‧‧‧Foam generation department

622‧‧‧Water supply

623‧‧‧Bracket

652‧‧‧The second manifold

681‧‧‧Flow inlet

682‧‧‧Spit out

684‧‧‧ Foam outlet

810‧‧‧Circulation waterway

812‧‧‧Partition wall

Claims (2)

A washing machine is characterized by comprising: a storage tank for storing laundry; a foam generating part provided in the storage tank to supply the generated foam into the storage tank; a water supply channel provided in the storage tank to supply the washing liquid To the foam generating part; a circulation water channel provided in the storage tank to circulate the washing liquid in the storage tank in the storage tank; and a circulation pump to supply the washing liquid in the storage tank to the foam generation And the circulation water channel, wherein an annular bracket is provided along the axial direction of the storage groove on the annular outer ring wall forming part of the storage groove, whereby the outer ring wall and the bracket A space is formed and an annular cover body covers the bracket along the axial direction of the receiving groove, thereby forming a space between the bracket and the cover body, between the outer ring wall and the bracket And the space between the holder and the lid are formed by overlapping the water supply channel and the circulation water channel in the axial direction of the storage groove. The washing machine according to claim 1, wherein the foam supplied to the storage tank by the foam generation unit and the washing liquid supplied to the storage tank by the circulation water channel do not collide with the foam at the position where the foam generation unit is disposed The outflow part and the discharge part of the aforementioned circulation water channel.

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