KR102397434B1 - Washing machine and generator for micro-bubble thereof - Google Patents

Abstract

The present invention relates to a washing machine and a microbubble generator for a washing machine.
According to one aspect of the present invention, a cabinet; an outer tub accommodated inside the cabinet and accommodating wash water; an inner tub accommodated inside the outer tub, in which laundry is accommodated; a water supply valve unit provided in the cabinet and connected to an external water supply source to receive wash water; a cabinet cover provided on the upper side of the cabinet and having an input hole for loading laundry; and a microbubble generator for receiving wash water from the water supply valve unit to generate microbubbles and supplying them to the laundry space, wherein the microbubble generator receives wash water in which gas is dissolved to generate microbubbles, and There may be provided a washing machine including a nozzle unit installed at a point around the periphery to discharge wash water into the inner tub immediately after the generation of microbubbles.

Description

WASHING MACHINE AND GENERATOR FOR MICRO-BUBBLE THEREOF

The present invention relates to a washing machine and a microbubble generator for a washing machine.

A washing machine is a device for separating contaminants from laundry using wash water and detergent, and can separate contaminants from laundry by chemical action of detergent dissolved in wash water and mechanical action of wash water and inner basket. there is.

Detergent is usually added together with washing water, and during the washing process, it is dissolved in the washing water and performs a predetermined chemical action to remove contaminants attached to the laundry. However, depending on the temperature and amount of wash water, the amount of detergent added, etc., the detergent may not be sufficiently dissolved in the wash water and may remain in the laundry. As the detergent is not sufficiently dissolved, the washing action may not be sufficiently performed, and contaminants may remain in the laundry. Detergent or foreign substances remaining in the laundry as described above may reduce user satisfaction and cause skin troubles.

Various techniques have been proposed to remove detergents or foreign substances remaining in the laundry, and, for example, a method using microbubbles has been proposed. Micro-bubbles are very small bubbles with a size of several micrometers or several nanometers in diameter, and are completely dissolved in water and disappear. Specifically, the microbubbles can be generally understood as a concept that collectively refers to microbubbles having a diameter of 50 μm or less, micro/nano bubbles (10 nm or more and less than 1 μm in diameter), and nano bubbles (less than 10 nm in diameter). Since these micro-bubbles have a high internal pressure, when the micro-bubbles burst in water, an impact may be applied to surrounding laundry, whereby detergents or foreign substances remaining in the laundry can be effectively separated.

A micro-bubble generator is provided in the washing machine to generate micro-bubbles. As the micro-bubble generator, it is possible to directly use a separate power device to generate bubbles, such as a compressor or a pump, and to use flow characteristics without using a power device. can be used

However, since the microbubble generator using a power device must use a high-performance power device that must generate microbubbles, the structure is complicated, the maintenance cost is high, the noise and vibration are severe, and the production cost of the washing machine is high. There is a problem with rising. On the other hand, the microbubble generator that does not use a power unit has advantages in that it has a simple structure, low maintenance cost, relatively weak noise and vibration, and can lower the production cost of the washing machine.

However, in the case of a microbubble generator that does not use a power device, there is a problem in that it is difficult to generate sufficient microbubbles since microbubbles generated passing through a flow path having a predetermined shape are directly discharged to the outside of the microbubble generator.

In addition, in the case of the prior art, after generating microbubbles, wash water containing microbubbles is transferred using a hose to a predetermined discharge position. In the case of the prior art, the microbubbles disappear while moving along the hose and the washing is substantially performed in the inner tank. There is a problem in that the amount of microbubbles flowing into the side decreases.

Patent Literature: Korean Patent Registration No. 10-1708597 (Registered on Feb. 14, 2017)

Embodiments of the present invention have been proposed to solve the above problems, and an object of the present invention is to provide a washing machine and a fine bubble generator for washing machines capable of improving washing and rinsing power by increasing the amount of microbubbles generated.

Another object of the present invention is to provide a washing machine and a microbubble generator for a washing machine, in which the generated microbubbles are not extinguished and can be supplied into the inner tub in which washing is performed.

According to one aspect of the invention, the cabinet; an outer tub accommodated inside the cabinet and accommodating wash water; an inner tub accommodated inside the outer tub, in which laundry is accommodated; a water supply valve unit provided in the cabinet and connected to an external water supply source to receive wash water; a cabinet cover provided on the upper side of the cabinet and having an input hole for loading laundry; and a microbubble generator for receiving wash water from the water supply valve unit to generate microbubbles and supplying them to the laundry space, wherein the microbubble generator receives wash water in which gas is dissolved to generate microbubbles, and There may be provided a washing machine including a nozzle unit installed at a point around the periphery to discharge wash water into the inner tub immediately after the generation of microbubbles.

In addition, the cabinet cover may be provided with a washing machine provided with a nozzle unit coupling portion provided on an outer bottom surface of the input hole to which the nozzle unit is coupled.

In addition, a part of the nozzle unit enters the inside of the input hole, and the washing machine is arranged to be positioned above the inner tub may be provided.

In addition, a nozzle cover is provided on the cabinet cover to cover a portion of the nozzle unit to prevent the nozzle unit from collided with laundry being fed into the input hole, and the nozzle cover is provided to the nozzle unit coupling part together with the nozzle unit. A fixed washing machine may be provided.

In addition, a nozzle unit installation groove in which the nozzle unit is installed is formed around the input hole of the cabinet cover, and the nozzle cover includes: a shielding part for shielding a part of the nozzle unit; a nozzle cover fixing part fixed to the nozzle unit coupling part together with the nozzle unit; and a connection part that connects the shielding part and the nozzle unit fixing part and is fitted into the nozzle unit installation groove.

In addition, a bolt for fixing the nozzle unit to the nozzle unit coupling portion; and

There may be provided a washing machine including a vibration-proof rubber that is inserted into the bolt and absorbs vibrations generated from the nozzle unit.

In addition, the vibration-proof rubber is provided at one end, the nozzle unit fitting groove into which a part of the nozzle unit is fitted; a bolt head support portion provided on the other end and on which the head of the bolt is supported; and a damping part provided between the nozzle part fitting groove and the bolt head support part and elastically deformed in an extension direction of the bolt to absorb vibration.

In addition, the washing machine may be provided in which the bolt is fixed to the nozzle unit coupling portion by sequentially passing through the vibration-proof rubber, the nozzle unit, and the nozzle cover.

In addition, the microbubble generator may include: a dissolving unit dissolving a gas in the wash water supplied from the water supply valve unit and supplying it to the nozzle unit; and a drainage unit discharging wash water remaining in the dissolution unit after the supply of wash water is completed.

In addition, the dissolution unit, one side is open, the gas is dissolved in the washing water to provide a dissolution space in the outer cylinder; an inner cylinder inserted into the dissolution space, at least a portion of which is installed to be spaced apart from the inner circumferential surface of the outer cylinder; and a cap for shielding the opening of the outer cylinder, converting the wash water supplied in one direction to the other direction forming a predetermined angle with the one direction, and supplying it to the inner space of the inner cylinder, wherein the gas accommodated in the outer cylinder may be provided with a washing machine that is dissolved in the wash water by the water supply pressure of the wash water overflowing from the inner tube.

In addition, the nozzle unit may include: a body portion including a pressurized space to receive wash water in which gas is dissolved, and pressurize the wash water; a bubble generating unit communicating with the pressurized space, the washing water passing through, and including a plurality of decomposing units generating fine bubbles; and a blocking unit that blocks at least a portion of the flow of wash water discharged from each of the decomposing units from being directly sprayed, wherein the fine bubbles generated in the decomposing unit are discharged from the decomposing unit and then in the wash water whose flow is slowed. There may be provided a washing machine that includes a mixing unit for mixing fine bubbles, and a nozzle unit for discharging wash water in which fine bubbles are dissolved into the washing space.

In addition, it further includes a main drain hose connected to the outer tub to drain the wash water to the outside, wherein the drain unit includes: a first body connected to the dissolution unit to receive the wash water; a second body coupled to the first body and connected to the main drain hose to discharge wash water; a diaphragm provided between the first body and the second body, the diaphragm being elastically deformed by wash water flowing through the first body, and having a first hole through which the wash water can pass; and a diaphragm support provided between the first body and the second body and having a second hole selectively shielded by elastic deformation of the diaphragm.

According to an aspect of the present invention, a microbubble generator of a washing machine that is installed in a washing machine to receive wash water to generate microbubbles and then supplies wash water containing microbubbles to an inner tub in which laundry is accommodated, wherein the washing water is supplied. a dissolution unit that receives and dissolves the gas stored therein in the wash water; The washing water in which the gas is dissolved is supplied from the dissolution unit to generate fine bubbles, the wash water containing the fine bubbles is discharged to the inner tub, and an input hole is provided at the upper side of the cabinet of the washing machine and for inserting laundry. a nozzle unit installed on a cabinet cover having a nozzle unit, a part of which is exposed to the inside of the input hole; and a drainage unit configured to drain the wash water remaining in the dissolution unit to the main drain hose of the washing machine after the supply of the wash water containing the fine bubbles is completed.

In addition, there may be provided a microbubble generator for a washing machine including a nozzle cover installed on the cabinet cover and configured to cover a portion of the nozzle unit exposed to the inside of the input hole to prevent the nozzle unit from being exposed upward.

In addition, the nozzle unit further includes a discharge unit for discharging wash water,

A microbubble generator of a washing machine may be provided in which the discharge part is formed in a shape in which a cross section becomes wider toward the discharge port.

In addition, a bolt for fixing the nozzle unit to a nozzle unit coupling portion formed on an outer bottom surface of the input hole of the cabinet cover; and a vibration-proof rubber inserted into the bolt to absorb vibrations generated from the nozzle unit.

In addition, the vibration-proof rubber is provided at one end, the nozzle unit fitting groove into which a part of the nozzle unit is fitted; a bolt head support portion provided on the other end and on which the head of the bolt is supported; and a damping part provided between the nozzle part fitting groove and the bolt head support part and elastically deformed in an extension direction of the bolt to absorb vibration.

According to the washing machine and the microbubble generator of the washing machine according to the embodiments of the present invention, there is an advantage in that washing power and rinsing power can be improved by increasing the amount of microbubbles generated.

In addition, there is an advantage in that the generated micro-bubbles are not extinguished and can be supplied into the inner tub in which washing is performed.

1 is a view showing a schematic configuration of a washing machine according to an embodiment of the present invention.
FIG. 2 is a view showing the configuration of the microbubble generator of FIG. 1 .
Figure 3 is an exploded perspective view of the dissolution unit of Figure 2;
Figure 4 is a cross-sectional view of the dissolution unit of Figure 2;
5 is an exploded perspective view of the nozzle unit of FIG. 2 .
6 is a cross-sectional view of the nozzle unit of FIG. 2 .
7 is a perspective view illustrating the cabinet cover of FIG. 1 as viewed from above;
8 is an exploded perspective view illustrating a state in which the nozzle unit is coupled to the cabinet cover of FIG. 9 .
9 is a cross-sectional view of the nozzle unit in which the vibration-proof rubber and bolts according to FIG. 8 are combined.
FIG. 10 is an exploded perspective view of the drain unit of FIG. 2 ;
11 is a cross-sectional view of the drain unit of FIG. 2 ;

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

In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a view showing a schematic configuration of a washing machine according to an embodiment of the present invention.

Referring to FIG. 1 , a washing machine 1 according to an embodiment of the present invention includes a cabinet 10 forming an exterior, a base 12 coupled to a lower portion of the cabinet 10 to support the washing machine 1, and the cabinet It may include a cabinet cover 14 coupled to the upper portion of the 10 and a door 16 coupled to the cabinet cover 14 to shield or open the opening of the cabinet.

The washing machine 1 can be divided into a top-loading method in which laundry is put in from above, a front-loading method in which laundry is put in from the front, and the like according to the direction in which the laundry 1 is placed. would. However, the spirit of the present invention is not limited thereto, and may be applied to a front-loading washing machine or a recently released hybrid washing machine.

Specifically, the cabinet 10 may be formed such that the upper and lower surfaces of the cabinet 10 are open and form the side surface of the washing machine 1 . A base 12 supporting the washing machine 1 may be provided at a lower side of the cabinet 10 , and a cabinet cover 14 may be coupled to an upper side of the cabinet 10 . The cabinet cover 14 provided on the upper side of the cabinet 10 may include an input hole 141 (refer to FIG. 7 ) for putting laundry in. In addition, a door 16 is installed in the cabinet cover 14 , and the door 16 may shield or open the input hole 141 to put in or take out laundry. The user can open the door 16 to put the laundry that needs washing into the washing machine 1 or take out the laundry that has been washed, and put the laundry in or take it out. It can be shielded by covering (141).

In addition, the washing machine 1 may include an outer tub 20 accommodated inside the cabinet 10 and accommodating wash water, and an inner tub 22 accommodated inside the outer tub 20 and accommodating laundry. The outer tub 20 and the inner tub 22 are accommodated inside the cabinet 10, and the outer tub 20 and the inner tub 22 are formed to correspond to each other, and the inner tub 22 is larger than the diameter of the outer tub 20. It may be formed with a diameter as small as a set length. That is, the inner tub 22 may be disposed to be spaced apart from the outer tub 20 by a predetermined distance inside the outer tub 20 . A plurality of holes for fluid communication with the outer tub 20 may be formed around the inner tub 22 . The outer tub 20 and the inner tub 22 are in fluid communication with each other through a plurality of holes formed in the inner tub 22 , so that the wash water of the inner tub 22 can flow to the outer tub 20 , and similarly, the Wash water may flow into the inner tub 22 . Meanwhile, the outer tub 20 and the inner tub 22 may be formed in a cylindrical shape, but are not limited thereto.

The washing machine 1 of the top-loading type according to the present embodiment may further include a pulsator 24 . The pulsator 24 may be coupled or integrated with the lower portion of the inner tank 22 to form the bottom surface of the inner tank 22 . The pulsator 24 may be provided on the bottom surface of the inner tub 22 to form a rotating flow and vortex in the wash water accommodated in the laundry space. Here, the laundry space means a space inside the outer tub 20, including the inner space of the inner tub 22, in which laundry and washing water can be accommodated. The pulsator 24 may be connected to the gear assembly 26 and rotated by receiving the rotational force of the motor 28 through the gear assembly 26 . A strong vortex is radially formed by the rotational force of the pulsator 24 , and the washing process may be performed while the washing water and laundry accommodated in the inner tub 22 are rotated by the strong vortex. At this time, the wash water accommodated between the inner tub 22 and the outer tub 20 may rise upward by the wash water in which a strong vortex is radially formed in the inner tub 22 . Accordingly, the washing water is circulated during the washing time in the washing space including the outer tub 20 and the inner tub 22 , and the laundry can be washed while a vortex is formed. However, as the pulsator 24 rotates, the inner tub 22 may or may not rotate together. For example, when the inner tank 22 and the pulsator 24 are integrally formed, as the pulsator 24 rotates, the inner tank 22 may also rotate together, and the pulsator 24 and the inner tank ( 22) is separately provided and fastened, only the pulsator 24 rotates to form a vortex.

Meanwhile, when the washing machine 1 is a drum washing machine that does not include the pulsator 24 , the gear assembly 26 and the motor 28 may be directly connected to the outer tub 20 or the inner tub 22 .

In addition, the washing machine 1 may include a detergent box 30 , a water supply valve unit 32 , a main drain hose 34 , and a main drain valve 36 .

The detergent box 30 is formed in a drawer shape and can be moved in a sliding manner in the detergent box receiving portion 142 (refer to FIG. 7 ) of the cabinet cover 14 . The detergent box 30 may be divided into a space in which the detergent is accommodated and a space in which the softening agent is accommodated. The detergent box 30 may be opened and closed in the inner direction of the washing machine 1, and the water supply valve unit 32 may be connected to the outside of the detergent box 30 (hereinafter, the inner tub 22 in which laundry is accommodated) ) side is referred to as the inner side, and the side of the cabinet 10 forming the exterior of the washing machine 1 is referred to as the outer side). Wash water may be supplied to the detergent box 30 through the water supply valve unit 32 connected to the external water supply source, and the wash water may be supplied to the inner tub 22 through the detergent box 30 . Since wash water is supplied to the inner tub 22 through the detergent box 30 , a detergent or softener may be dissolved in the wash water supplied to the inner tub 22 .

The water supply valve unit 32 may be provided on the cabinet cover 14 and may be connected to an external water supply source through an external hose (not shown) to receive wash water from the external water supply source. The water supply valve unit 32 may be formed of a four way valve (not shown). Although not shown in the drawings, the saro valve may include a hot water supply valve for supplying hot water, a cold water supply valve for supplying cold water, and a microbubble water supply valve for supplying cold water for generating microbubbles. The hot water supply valve may be in fluid communication with the space containing the detergent. In addition, the cold water supply valve may be formed as a two-way valve, so that one may be in fluid communication with the space in which the detergent is accommodated, and the other may be in fluid communication with the space in which the softening agent is accommodated. The microbubble water supply valve may be connected to the dissolution unit 500 for generating microbubbles.

The main drain valve 36 is provided at the lower portion of the outer tub 20 to control whether or not the wash water accommodated in the outer tub 20 is drained. Specifically, the main drain valve 36 may be installed in communication with the lower portion of the outer tank 20 , and the main drain hose 34 may be connected to the main drain valve 36 . When draining the wash water used for washing to the outside, open the main drain valve 36 to drain the wash water through the main drain hose 34. By closing the drain valve 36 , wash water may be accommodated in the outer tub 20 and the inner tub 22 .

In addition, the washing machine 1 may include a control unit 40 and an operation unit 42 . The operation unit 42 may be installed on the cabinet cover 14 and may include an interface means through which a user can input a predetermined command or output predetermined information to the user. The control unit 40 may control the motor 28 , the pulsator 24 , the water supply valve unit 32 , the operation unit 42 , and the like. For example, when the user sets the washing course, washing time, etc. through the operation unit 42, the control unit 40 controls the motor 28, the pulsator 24, the water supply valve unit 32, etc. A corresponding washing process may be performed.

Meanwhile, the washing machine 1 may include a microbubble generator (BG) that receives wash water from the water supply valve unit 32 to generate microbubbles and supply them to the laundry space. The fine bubble generator BG may include a dissolution unit 500 , a nozzle unit 600 , and a drainage unit 700 .

In addition, the washing machine 1 may include a water supply line L1, a supply line L2, a first drain line L3, and a second drain line L4 for interconnecting the microbubble generator BG. . The water supply line L1 may supply wash water to the dissolution unit 500 , and the supply line L2 may provide wash water in which gas is dissolved from the dissolution unit 500 to the nozzle unit 600 . In addition, the first drain line L3 may provide wash water remaining from the dissolution unit 500 to the drain unit 700 , and the second drain line L4 supplies wash water from the drain unit 700 to the main A drain hose 34 may be provided.

The dissolution unit 500 may dissolve gas in the wash water supplied from the water supply valve unit 32 . In this embodiment, the gas is described as an example of air accommodated in the dissolution unit 500, but may be provided from a predetermined gas providing means connected to the dissolution unit 500 or provided together with the dissolution unit 500 .

The dissolution unit 500 may receive wash water through the water supply line L1 connected to the water supply valve unit 32, and the washing water supplied through the water supply line L1 without using a power unit is supplied. Air bubbles can be generated in the washing water by using water pressure. That is, the gas stored in the dissolution unit 500 may be dissolved in the wash water supplied into the dissolution unit 500, whereby bubbles may be generated in the wash water.

The nozzle unit 600 may receive the wash water in which the gas is dissolved from the dissolution unit 500 through the supply line L2 to generate fine bubbles. Specifically, the nozzle unit 600 may generate fine bubbles by splitting the bubbles generated as the gas is dissolved in the wash water in the dissolution unit 500 . Such a nozzle unit 600 may be installed at a point around the input hole 141 and lead to the inside of the inner tub 22 immediately after the generation of microbubbles. The microbubbles generated in the nozzle unit 600 gradually disappear when time passes or when they are moved along a predetermined flow path. In the case of discharging into the inside, the amount of disappearance of microbubbles can be minimized, and the effect of washing water in which microbubbles are dissolved can be improved.

The drainage unit 700 may discharge the wash water remaining in the dissolution unit 500 after the supply of wash water including microbubbles through the dissolution unit 500 and the nozzle unit 600 is completed. Specifically, the drainage unit 700 may be connected to the dissolution unit 500 through the first drainage line L3, and may be connected to the main drainage hose 34 through the second drainage line L4. In this case, the drain unit 700 may drain the wash water remaining in the dissolution unit 500 to the main drain hose 34 .

Hereinafter, with reference to the drawings, a detailed configuration of the microbubble generator (BG) according to an embodiment of the present invention will be described.

Figure 2 is a view showing the configuration of the microbubble generator of Figure 1, Figure 3 is an exploded perspective view of the dissolution unit of Figure 2, Figure 4 is a cross-sectional view of the dissolution unit of Figure 2, Figure 5 is the nozzle unit of Figure 2 It is an exploded perspective view, FIG. 6 is a cross-sectional view of the nozzle unit of FIG. 2 , FIG. 7 is a perspective view showing the cabinet cover of FIG. 1 as viewed from above, and FIG. 8 is a state in which the nozzle unit is coupled to the cabinet cover of FIG. 9 It is an exploded perspective view showing, FIG. 9 is a cross-sectional view of the nozzle unit to which the vibration-proof rubber and bolts are combined according to FIG. 8, FIG. 10 is an exploded perspective view of the drain unit of FIG. 2, and FIG. 11 is a cross-sectional view of the drain unit of FIG.

2 to 11 , the fine bubble generator BG may include a dissolution unit 500 , a nozzle unit 600 , and a drainage unit 700 , as described above.

First, the dissolution unit 500 may receive wash water and dissolve the gas stored therein in the wash water. The dissolution unit 500 is disposed on the lower side of the cabinet 10, is disposed between the cabinet 10 and the outer tank 20, and the inner wall of the cabinet 10 so as to be spaced apart from the outer tank 20 in which vibration is largely generated. can be fixed to In addition, the dissolution unit 500 may be formed to be elongated in the vertical direction so as to be disposed between the outer tank 20 and the cabinet 10 having a narrow interval. Hereinafter, the vertical direction refers to the direction of gravity as the vertical direction with reference to FIG. 1 , and this may be referred to as a vertical direction. In addition, the left-right direction with reference to FIG. 1 is a direction parallel to the ground and may be referred to as a horizontal direction.

In addition, the dissolution unit 500 may be disposed below the water supply valve unit (32). Specifically, the water supply valve unit 32 is disposed on the upper side of the dissolution unit 500 , so that the direction from the water supply valve unit 32 to the dissolution unit 500 becomes the gravity direction, and in the water supply valve unit 32 , Since the wash water supplied to the dissolution unit 500 also flows in the direction of gravity, the wash water can be supplied more smoothly.

Here, referring to FIGS. 2 to 4 , the dissolution unit 500 includes an outer cylinder 510 , an inner cylinder 520 provided in the outer cylinder 510 , and a cap 530 coupled to the upper portion of the outer cylinder 510 . may include

First, the outer cylinder 510 is provided in a cylindrical shape with an open upper end, and can accommodate gas and wash water, and can provide a dissolution space in which the gas is dissolved in the wash water. The dissolution space refers to a space in which washing water and gas meet inside the outer cylinder 510 and the dissolution action of the gas occurs. The outer cylinder 510 may include a nozzle unit connection part 512 , a drain unit connection part 514 , a cabinet fixing part 516 , and a supply line fixing part 518 and a cap fixing part 519 .

The nozzle unit connection part 512 is formed to connect the supply line L2 for supplying the gas-dissolved wash water to the nozzle unit 600 , and may be disposed on the outer peripheral surface of the outer cylinder 510 . In particular, it may be disposed below the outer peripheral surface of the outer cylinder (510).

The drain unit connection part 514 may connect the wash water remaining in the outer cylinder 510 to the drain unit 700 . A first drain line L3 is connected to the drain unit connection part 514 to drain the wash water remaining in the outer cylinder 510 to the drain unit 700 . In particular, the drain unit connection part 514 may be disposed under the outer cylinder 510 .

Meanwhile, the nozzle unit connection part 512 and the drain unit connection part 514 may be formed in different directions. As an example, the nozzle unit connection part 512 according to the position direction of the nozzle unit 600 in the lower part of the outer cylinder 510 in order to be easily connected with the nozzle unit 600 disposed on the upper side of the dissolution unit 500 . It may be formed to protrude laterally. The drainage unit connection part 514 may be formed to protrude downward from the lower part of the outer cylinder 510 in order to be easily connected with the drainage unit 700 disposed on the lower side of the dissolution unit 500 . In particular, the drain unit connection part 514 is formed at the lowermost end of the outer tube 510 to drain the wash water remaining in the outer tube 510 , and may extend in a downward direction in which the wash water falls by gravity. However, the positions and directions of the nozzle unit connection part 512 and the drain unit connection part 514 are not limited thereto.

The cabinet fixing unit 516 is for stably fixing the dissolution unit 500 to the cabinet 10 , and may be a locking protrusion protruding toward the inner wall of the cabinet 10 , and on the outer peripheral surface of the outer cylinder 510 . can be provided.

The supply line fixing unit 518 is for stably fixing the supply line L2 that guides the wash water in which the gas is dissolved to the discharge position. Specifically, the supply line fixing unit 518 may fix the supply line L2 that provides the wash water in which the gas is dissolved from the dissolution unit 500 to the nozzle unit 600 . To this end, the supply line fixing part 518 may be provided at a position where the supply line L2 passes on the outer peripheral surface of the outer cylinder 510 .

The cap fixing unit 519 may be formed on the upper end of the outer cylinder 510 to couple and fix the outer cylinder 510 and the cap 530 . The cap fixing part 519 may be a rib extending outwardly along the outer peripheral surface of the upper end of the outer cylinder 510 .

The inner cylinder 520 may be inserted into the dissolution space of the dissolution unit 500 . Specifically, the inner cylinder 520 may be installed to be inserted into the inner side of the outer cylinder 510 and at least a portion of which is spaced apart from the inner circumferential surface of the outer cylinder 510 . For example, the inner cylinder 520 may be formed so that the side and lower ends are spaced apart from the inner surface of the outer cylinder (510). However, the inner tube 520 is not limited to being formed so that the side and the lower end are spaced apart from the inner surface of the outer tube 510, one side of the inner tube 520 is in contact with the inner surface of the outer tube 510, the other side And the lower end may be formed to be spaced apart from the inner surface of the outer cylinder (510). In addition, as described above, the dissolution space refers to a space where washing water and gas meet inside the outer cylinder 510 and the dissolution action of the gas occurs, including the inner space of the inner cylinder 520 disposed in the outer cylinder 510 do.

In particular, the volume of the inner space of the inner tube 520 may be formed to be smaller than 1/3 of the volume of the inner space of the outer tube (510). For example, the lower end of the inner tube 520 may be located higher than 1/3 of the entire length of the outer tube 510 from the lower end of the outer tube 510. Accordingly, it is possible to increase the amount of gas dissolved in the wash water in the dissolution unit (500). Specifically, the gas in the dissolution space may be dissolved in the wash water supplied to the inner cylinder 520 through the water supply line connection part 532 to generate fine bubbles, and substantially the dissolution of the gas overflows in the inner cylinder 520 . Washing water is moved to the space between the inner tube 520 and the outer tube 510 is made. Accordingly, as the volume difference between the outer cylinder 510 and the inner cylinder 520 increases, the space for storing the gas and the space in which the gas is dissolved in the outer cylinder 510 may increase. However, the volume of the inner space of the inner cylinder 520 may not be formed smaller than 1/2 of the volume of the inner space of the outer cylinder 510 . When the volume in the inner tube 520 is less than 1/2 of the volume in the outer tube 510, the amount of wash water for dissolving the gas is reduced, so that the amount of bubbles generated can be reduced.

Accordingly, the inner cylinder 520 may include an overflow part 522 and a residual water discharge hole 524 .

The overflow portion 522 may include a plurality of overflow holes formed along the circumferential direction of the inner tube 520 so that the washing water introduced into the inner space of the inner tube 520 may overflow at the upper end of the inner tube 520 . there is. For example, the overflow part 522 may include a plurality of ribs extending radially from the upper end of the inner cylinder 520 , and a space between the ribs may be an overflow hole. In this case, the upper end of the overflow portion 522 is seated on the upper end of the outer tube 510 , so that the inner tube 520 may be fixed to the outer tube 510 .

Wash water supplied through the water supply line connection unit 532 is supplied to the inner cylinder 520 , and when the wash water overflows from the inner cylinder 520 , the inner cylinder 520 and the outer cylinder 510 are separated through the overflow unit 522 . It can fall into the dissolution space between them. At this time, gas and wash water may be dissolved in the dissolution space to generate bubbles.

The residual water discharge hole 524 is a hole formed to drain the wash water remaining in the inner tube 520 through the drain unit 700 after the wash water containing air bubbles is supplied to the nozzle unit 600 . The residual water discharge hole 524 may be formed at the lowermost end of the inner tube 520 , and the diameter of the residual water discharge hole 524 may be formed to be smaller than the diameter of the upper opening of the inner tube 520 . Accordingly, the supply amount of wash water flowing into the inner tube 520 may be greater than the drainage amount, and the wash water may overflow from the inner tube 520 .

The residual water discharge hole 524 may be located directly above the drain unit connection part 514 that connects the wash water remaining in the outer cylinder 510 to the drain unit 700 . Therefore, in the process of discharging the remaining wash water, the wash water remaining in the inner cylinder 520 is made to fall into the residual water discharge hole 524 located at the lowest end of the inner cylinder 520 , and is immediately discharged to the drain unit connection part 514 . can be Accordingly, the washing water remaining in the inner tube 520 may not remain in the outer tube 510 once more during the discharge process, and may fall to the drain unit connection part 514 and be immediately discharged.

The cap 530 may be coupled to the upper portion of the outer tube 510 to shield the opening of the outer tube 510 . As the cap 530 and the outer cylinder 510 are fastened, the movement of the gas is blocked so that the gas can be stored in the dissolution space in the dissolution unit 500 , and thus the gas can be stored in the dissolution unit 500 .

The cap 530 may further include a water supply direction changing part 534 , an air pocket part 536 , and an outer cylinder fixing part 539 as well as the above-described water supply line connection part 532 .

Specifically, the cap 530 including the water supply line connection part 532 and the water supply direction switching part 534 is coupled to the upper end of the outer cylinder 510 to shield the outer cylinder 510 and wash from the water supply valve unit 32 . Upon receiving the water, the water supply direction changing unit 534 may change the direction of the wash water flowing in through the water supply line connecting unit 532 to the inner cylinder 520 direction.

The water supply line connection part 532 may be connected to the water supply line L1 to supply wash water provided from the water supply valve unit 32 into the dissolution unit 500 .

The water supply line connection part 532 may extend from the cap 530 in a horizontal direction to allow wash water to flow into the inside of the cap 530 in a horizontal direction. Specifically, the washing water supplied in the vertical direction from the water supply valve unit 32 disposed on the upper side of the dissolution unit 500 is switched at least once in the direction may be horizontally supplied to the water supply line connection unit 532 . Accordingly, the washing water may be discharged into the inner space of the inner cylinder 520 in a vertical direction after entering the water supply line connecting portion 532 in the horizontal direction of the cap 530, the direction is changed.

The water supply direction switching unit 534 communicates with the discharge side end of the water supply line connection unit 532, and is switched in the vertical direction at one end of the water supply line connection unit 532 formed in the left and right direction to communicate, so the water supply direction switching unit 534 may change the direction of the wash water supplied through the water supply line connection part 532 and introduce it into the inner cylinder 520 .

The water supply direction change unit 534 may be formed at a position corresponding to the center of the inner tube 520 so that the wash water supplied with the water is discharged to the inner tube 520 .

For example, the water supply line connecting part 532 and the water supply direction changing part 534 may be arranged in an 'L' shape at an angle of 90 degrees. This 'L' shape is to prevent the washing water supplied through the water supply line L1 from being directly sprayed from the water supply line L1 to the inner cylinder 520, and the washing water is bent by the 'L' shape. As the water is supplied, the supplied wash water may be uniformly supplied. On the other hand, when the water supply line connection part is formed in an 'I' shape, wash water is supplied from the water supply line L1 by direct injection. Since the overflow of washing water in 520 may be irregularly formed, the dissolution of the gas may not be performed smoothly. However, in the present embodiment, since wash water is discharged after it collides with one wall of the water supply direction changer 534 and spreads, it is possible to relatively uniformly supply wash water to the inner tube 520, and accordingly, the overflow The dissolution action of the gas can be made more smoothly.

In addition, the water supply line connecting part 532 may be connected to the middle point in the vertical direction of the water supply direction changing part 534 . Therefore, the wash water supplied in the horizontal direction enters the water supply direction changing unit 534 formed by being bent in the vertical direction and collides with the inner wall of the water supply direction changing unit 534, and the vertical direction of the water supply direction changing unit 534 is can spread to Specifically, the wash water is bent from the horizontal direction to the vertical direction and is not sprayed directly into the inner cylinder 520 , but the wash water collides with the inner wall of the water supply direction changing unit 534 and spreads in the vertical direction, so that the flow can be more uniform. Since the wash water is uniformly supplied to the inner cylinder 520 , the bubbles in the dissolution space are uniformly supplied to the wash water so that the bubbles are uniformly formed.

Therefore, the dissolution unit 500 folds the wash water flowing in from the water supply valve unit 32 once in the horizontal direction, and then folds it again in the vertical direction, so that the dissolution unit 500 inside the water supply valve unit 32 Direct injection into the furnace can be prevented.

The air pocket portion 536 is formed on the opposite side of the water supply line connection portion 532 with respect to the water supply direction change portion 534, and communicates with the internal space of the dissolution unit 500 to provide a space for accommodating gas. there is.

Specifically, the air pocket portion 536 is formed by extending the outer cylinder 510 from the upper portion of the cap 530 to the height at which the water supply direction conversion portion 534 protrudes, and the air pocket portion 536 contains the gas. A space for storing the . The volume in which the gas can be stored in the dissolution unit 500 through the air pocket portion 536 may be increased, and accordingly, the amount of dissolution of the gas may be increased.

The outer cylinder fixing part 539 may couple and fix the cap 530 and the outer cylinder 510 . The outer cylinder fixing part 539 may be a rib that is formed to extend outwardly along the outer peripheral surface of the lower end of the cap 530 so as to be fitted into the cap fixing part 519 .

Therefore, in order to couple and fix the outer cylinder 510 and the cap 530 , the outer cylinder fixing part 539 of the cap 530 may be inserted into the cap fixing part 519 of the outer cylinder 510 . As the cap fixing part 519 and the outer cylinder fixing part 539 are fastened, the outer cylinder 510 and the cap 530 may be sealed. However, the cap fixing part 519 and the outer cylinder fixing part 539 are not limited to the rib shape, and may be formed of a flange or the like.

Next, the nozzle unit 600 may receive the washing water in which the gas is dissolved from the dissolution unit 500 to generate fine bubbles. Specifically, the nozzle unit 600 may split the bubbles included in the wash water supplied from the dissolution unit 500 into fine bubbles, or increase the amount of the bubbles to discharge into the inner tub 22 .

Here, with reference to FIGS. 2 and 5 and 6 , the nozzle unit 600 includes a body part 610 connected to the dissolution unit 500 , a bubble generator 620 for generating fine bubbles, and a gasket 630 . ), and a nozzle unit 640 for discharging wash water containing microbubbles to the inner tub 22 .

The body portion 610 may include a dissolution unit connection unit 612 , and the dissolution unit connection unit 612 may be connected to the supply line L2 to receive microbubbles from the dissolution unit 500 .

The body part 610 may receive wash water in which the gas is dissolved, and the wash water may be pressurized from the inside of the body part 610 . The body portion 610 may include a dissolution unit connection unit 612 , a bubble generating unit receiving unit 614 , a pressure space 615 , and a nozzle unit connection unit 618 .

The dissolution unit connection part 612 may be connected to the supply line L2 to supply wash water in which the gas is dissolved from the dissolution unit 500 into the nozzle unit 600 .

The bubble generating unit accommodating unit 614 may be connected to the pressurized space 615 to accommodate the bubble generating unit 620 . The bubble generating unit accommodating unit 614 communicates with the dissolution unit connection unit 612 and may be formed to protrude toward the nozzle unit 640 side. The bubble generating unit receiving unit 614 may be formed by expanding the diameter of the dissolution unit connecting unit 612 to be larger. Specifically, the bubble generating unit accommodating unit 614 may be formed to correspond to the size, shape, and cross-sectional area of the bubble generating unit 620 so that the bubble generating unit 620 can be inserted. However, the bubble generating unit receiving unit 614 is formed longer than the length of the bubble generating unit 620, after the bubble generating unit 620 is inserted between the dissolution unit connection unit 612 and the bubble generating unit (620) A pressurized space 615 may be formed.

In order to form a pressurized space 615 by separating the bubble generating unit 620 from one end connected to the dissolution unit connection unit 612 by a preset distance in the bubble generating unit receiving unit 614, the bubble generating unit receiving unit ( 614), a step may be provided at a position of a preset distance from one end to the other end. By being caught by the bubble generating unit 620 on this step, when the bubble generating unit 620 is inserted into the bubble generating unit receiving unit 614, it may be spaced apart from the dissolution unit connection unit 612 and a preset distance. The pressurized space 615 may be understood as a space between the end of the dissolution unit connection unit 612 and the bubble generating unit 620 as described above.

The dissolution unit connection part 612 is connected to one end of the pressurized space 615 so that the washing water including air bubbles may be introduced into the pressurized space 615 . The pressurized space 615 may receive wash water in which gas is dissolved from the dissolution unit 500 , and the wash water may be pressurized in the pressurized space 615 . Specifically, the wash water in which the gas is dissolved passes through the supply line L2 with a narrow flow path and enters the pressurized space 615 having a larger cross-sectional area than the supply line L2, so that the cross-sectional area is smaller than the cross-sectional area of the pressurized space 165 . Wash water in which gas is dissolved before being passed through the bubble generating unit 620 having a may be pressurized. As the pressure increases, the amount of bubbles generated in the wash water may increase. Accordingly, it is possible to increase the pressure of the wash water in which bubbles are dissolved in the pressure space 615 and supply it to the decomposition unit 624 .

The nozzle part connection part 618 is formed around the bubble generating part receiving part 614 and is connected to the body connection part 648 of the nozzle part 640, so that the body part 610 and the nozzle part 640 can be fixed. there is. The nozzle part connection part 618 is formed to couple the body part 610 and the nozzle part 640 , and the nozzle part connection part 618 extends from both upper and lower sides of the outer peripheral surface of the bubble generating part receiving part 614 . It may be formed and provided. However, the two nozzle connection parts 618 formed on both upper sides of the bubble generating unit accommodating part 614 are formed to protrude in the nozzle part 640 direction, and are formed on both lower sides of the bubble generating unit accommodating part 614 . The two nozzle connection parts 618 may be formed to protrude in the dissolution unit connection part 612 direction. This is because the nozzle part connection part 618 is coupled to the body connection part 648 of the nozzle part 640 which will be described later, and the lower part of the body connection part 648 protrudes toward the nozzle connection part 618 side rather than the upper part. In order to correspond to the body connection part 648, the nozzle part connection part 618 is formed to protrude toward the body connection part 648 side rather than the bottom part, and the bottom part to protrude toward the dissolution unit connection part 612 side. Each nozzle part connection part 618 may include a hole through which a fastening member can be inserted or penetrated. A total of four nozzle unit connection units 618 may form a rectangular border along the outer circumferential surface of the bubble generating unit receiving unit 614 and be formed at each vertex.

The bubble generating unit 620 is inserted into the bubble generating unit receiving unit 614 to be disposed on one side of the pressurized space (615). The bubble generating unit 620 includes a housing 622 accommodated in the body unit 610, and a plurality of decomposing units 624 arranged at preset intervals along the circumference of the housing 622 inside the housing 622. can do. In one embodiment of the present invention, one to describe that four decomposition parts 624 are formed in the housing 622, but is not limited to four, and may include all of which one or more decomposition parts 624 are formed. .

The decomposition part 624 is a pipe whose diameter is widened along the flow direction of the fluid flowing in from the pressurized space 615 , and may indicate a flow path formed inside the housing 622 . A plurality of decomposing units 624 may be formed in the housing 622 , and the decomposing units 624 communicate with the pressurized space 615 , and wash water entering the decomposing unit 624 from the pressurized space 615 is decomposed. Passing through the portion 624, microbubbles may be generated. In this case, the side opening through which the wash water flows into the disassembling unit 624 is referred to as the inlet 624a of the disassembling unit 624 , and the side opening through which the wash water is discharged from the disassembling unit 624 is referred to as the outlet 624b . The inlet 624a and the outlet 624b may have a center collinear with each other, and the inlet 624a may have a smaller cross-sectional area than the outlet 624b. Accordingly, the decomposition part 624 is formed to extend from the inlet 624a to the outlet 624b, and may have a tapered cross-sectional shape.

The wash water in which the gas is dissolved may contain bubbles of relatively large size, and this wash water may be introduced into the inlet 624a of the decomposition unit 624 from the pressurized space 615 and discharged through the outlet 624b. there is. As the diameter of the inlet 624a communicating with the pressurized space 615 is rapidly reduced than the diameter of the pressurized space 615, the wash water flowing into the inlet 624a from the pressurized space 615 has an increased flow rate. can be imported. And, as it passes through the gradually expanding decomposition part 624, the flow rate of wash water decreases and the pressure rises. Accordingly, the bubbles included in the wash water are split to generate fine bubbles, or inside the wash water. New air bubbles may be generated in the

The gasket 630 may be provided around the outlet side of the decomposing unit 624 of the bubble generating unit 620 . When the bubble generating unit 620 is inserted into the nozzle unit 640 , the gasket 630 surrounds the bubble generating unit 620 inside the nozzle unit 640 and is pressed against the end of the body unit 610 at the same time. can be placed. Accordingly, the gasket 630 is pressed and fixed by the body portion 610 and the nozzle portion 640 , and leakage of microbubbles may be prevented. The gasket 630 may be formed of an O-ring, but is not limited thereto.

The nozzle unit 640 may be coupled to the body unit 610 so that the bubble generating unit 620 may be accommodated and fixed inside the body unit 610 , and may discharge microbubbles into the inner tub 22 . The nozzle unit 640 is connected to the first part 640a forming the first mixing space 642 and the first part 640a to discharge wash water in which microbubbles are dissolved from the upper part of the inner tub 22 . and a second portion 640b. The first part (640a) and the second part (640b) are provided with blocking parts (643, 645) that block at least a portion of the flow of wash water discharged from the respective decomposing parts (624) from being directly sprayed, and are disassembled. It may include microbubble mixing units 642 and 644 for mixing the fine bubbles generated in the unit 624 with the washing water having a slow flow after being discharged from the decomposing unit 624 .

Specifically, the first part 640a communicates with the decomposition part 624 and proceeds along the first mixing space 642 and the first mixing space 642 which may have the same cross-sectional area as the cross-sectional area of the housing 622 . It may include a first blocking surface 643 to change the flow of washing water. In addition, the second portion 640b is connected to the first mixing space 642 , along the second mixing space 644 having a smaller cross-sectional area than the first mixing space 642 , and the second mixing space 644 . It may include a second blocking surface 645 for changing the flow of washing water in progress.

The first mixing space 642 and the second mixing space 644 may increase the amount of microbubbles generated by preventing direct injection while widening the flow path as much as possible.

The first mixing space 642 has a cylindrical shape corresponding to the cross-sectional shape of the bubble generating unit 620 , and may have a diameter corresponding to the diameter of the bubble generating unit 620 . The first mixing space 642 is a space in which the wash water in which the microbubbles discharged from the decomposing unit 624 are already discharged from the decomposing unit 624 can be mixed with the wash water whose flow is slowed. Specifically, after passing through the decomposition unit 624 , the wash water having a slow flow may be discharged to the first mixing space 642 , and some of the washing water having the slow flow may remain in the first mixing space 642 . At this time, the wash water continuously sprayed from the decomposition unit 624 and the wash water staying in the first mixing space 642 collide and mix, and the bubbles in the wash water are further split, and the fine bubbles are uniformly distributed in the wash water. can

The second mixing space 644 allows the wash water discharged from the first mixing space 642 to stay for a certain period of time, and as the washing water rapidly discharged from the first mixing space 642 collides with the remaining wash water, microbubbles once again can be created.

Here, the second mixing space 644 may be formed to have a smaller diameter than the first mixing space 642 , and the first mixing space 642 and the second mixing space 644 may be formed to have a step. In this case, one side of the step leading from the first mixing space 642 to the second mixing space 644 may be the first blocking surface 643 . In this case, the step may be formed at a height corresponding to the center line C connecting the center of the inlet 624a of the decomposition part 624 and the center of the outlet 624b.

The first blocking surface 643 is formed to be connected from the side surface of the first mixing space 642, and is parallel to the exit 624b surface of the decomposing unit 624 or inclined to protrude toward the decomposing unit 624. can For example, the first blocking surface 643 is a side that forms the first mixing space 642 , and may be formed to be spaced apart from the outlet of the nozzle unit 640 by a predetermined distance. At this time, the end of the first blocking surface 643 is to be located at a height corresponding to 90% to 110% of the distance from the side surface of the first mixing space 642 to the extension line of the center line C of the decomposition part 624. In this embodiment, it is illustrated that the end of the first blocking surface 643 is positioned at a height corresponding to the extension line of the center line C of the decomposition part 624 as an example. By forming the first blocking surface 643 as described above, the washing water is directly sprayed from the decomposing unit 624 and is blocked from being directly discharged, while at the same time increasing the size of the flow path through which the washing water is supplied as much as possible, and the nozzle unit 640 . configuration can be simplified.

As the wash water flows from the decomposition part 624 with a narrow flow path to the first mixing space 642 with a wide flow path, the flow becomes slow. In this case, the first blocking surface 643 may prevent the washing water having a slow flow from being discharged by direct injection from the decomposition unit 624 to the first mixing space 642 and the second mixing space 644 . Therefore, the flow is slowed down in the first mixing space 642 by the first blocking surface 643, and the washing water that stays temporarily is sprayed from the disassembling unit 624 and collides with the first blocking surface 643 in the first mixing space ( 642), the washing water sprayed again collides, and microbubbles may be generated. The first blocking surface 643 may be formed at an angle so as not to be inclined in the traveling direction so as to prevent direct injection of the wash water discharged from the decomposition unit 624 . By preventing the direct injection in this way, it is possible to prevent the microbubbles generated in the decomposition unit 624 from being evenly spread in the wash water or from being discharged immediately without sufficient time to dissolve, as well as preventing the first mixing space 642 . ) can cause additional microbubbles to be generated.

In summary, according to the nozzle unit 600 according to an embodiment of the present invention, the bubbles introduced from the dissolution unit 500 flow while passing through the outlet 624b that is expanded from the inlet 624a of the decomposition unit 624 As this slows down, the pressure rises. Accordingly, the bubble may be split into microbubbles, and bubbles may be additionally generated. The microbubbles whose flow is slowed through the decomposition unit 624 are discharged to the first mixing space 642, some are slowly discharged from the first mixing space 642 to the second mixing space 644, and some are 1 Direct injection can be prevented by colliding with the blocking surface 643 . The microbubbles colliding with the first blocking surface 643 are not directly injected into the second mixing space 644 , but are injected into the first mixing space 642 , causing a collision between the bubbles in the first mixing space 642 . As a result, it is broken into microbubbles, and the amount of bubbles generated can be increased. Therefore, since the microbubbles are not supplied to the second mixing space 644 by direct injection while colliding with the first blocking surface 643 , and microbubbles are generated once more by the first blocking surface 643 , the amount of microbubbles can be increased.

The microbubbles generated in the first mixing space 642 are discharged to the second mixing space 644 . The second mixing space 644 may serve as a guide to guide the microbubbles to a discharge position where they are discharged into the inner tub 22 . A second blocking surface 645 may be provided at a portion guiding to the discharge position. The microbubbles discharged from the first mixing space 642 collide with the second blocking surface 645 , and direct injection may be prevented once more. The bubbles discharged in the form of bubbles from the first mixing space 642 collide with the second blocking surface 645 to be split into microbubbles, and the amount of microbubbles generated may increase. In addition, since the second blocking surface 645 is provided at the discharge position, microbubbles discharged from the second blocking surface 645 may be directly supplied into the inner tank 22 . In addition, the nozzle unit 640 may further include a discharge unit 646 , a body connection unit 648 , and a nozzle unit fixing unit 649 .

Wash water in which microbubbles are dissolved may be discharged into the washing space through the discharge unit 646 . The discharge part 646 is formed in a shape in which the cross section becomes wider toward the discharge port side, and the inner surface of the discharge part 646 may be the second blocking surface 645 . In addition, the discharge part 646 may be formed to be inclined at a predetermined angle in the direction of the inner tub 22 in the second mixing space 644 to face the inner tub 22 . The second blocking surface 645 may be formed to be inclined at a predetermined angle in the direction of the inner tub 22 to correspond thereto. Since the discharge part 646 is formed to be diffused with an inclination toward the inner tub 22 , it is possible to prevent scattering of microbubbles discharged to the inner tub 22 .

The body connection part 648 includes a surface extending from one end of the nozzle part 640 in the vertical direction of the flow path of the nozzle unit 600, and the nozzle connection part 618 of the body part 610 on the extended surface. It may include a hole formed at a corresponding position. A fastening member may be penetrated or inserted into the hole. Accordingly, the body part 610 and the nozzle part 640 may be coupled to each other by bringing the body connection part 648 into contact with the nozzle connection part 618 of the body part 610 and inserting or penetrating a fastening member such as a bolt.

In addition, in order for the nozzle unit 640 to more stably support the bubble generating unit 620 from the lower side, the lower portion of the body connecting portion 648 may be formed to protrude in the body portion 610 direction than the upper portion. For example, the lower portion of the body connecting portion 648 protrudes so as to surround the entire bubble generating unit 620 , and the upper portion of the body connecting portion 648 may be formed to expose a predetermined length of the bubble generating unit 620 . there is. Thereby, the two formed on both upper sides of the nozzle part connection part 618 are formed to protrude toward the nozzle part 640 side, and the two formed on both lower sides of the nozzle part connection part 618 are the dissolution unit connection part 612. It may be formed to protrude to the side.

The nozzle unit fixing part 649 may be formed in a direction perpendicular to the body connection part 648 on both sides of the body connection part 648 . That is, the nozzle unit fixing part 649 may be formed parallel to the flow path shape direction of the nozzle unit 600 . A hole is formed in the nozzle unit fixing part 649 to insert a fastening member. Accordingly, the nozzle unit 600 can be fixed to the cabinet cover 14 .

Summarizing the flow principle of wash water by the nozzle unit 600 according to an embodiment of the present invention, the wash water introduced through the dissolution unit connection part 612 is introduced into the pressurization space 615, stays for a predetermined time and is pressurized. can Thereafter, while the washing water in the pressurized space 615 passes through the decomposition unit 624 , the bubbles included in the wash water may be split to become fine bubbles, or additional fine bubbles may be generated. Wash water discharged from the decomposition unit 624 to the first mixing space 642 is not directly sprayed by the first blocking surface 643 formed in the first mixing space 642 , but as it collides with the first blocking surface 643 . It stays in the first mixing space 642 for a certain period of time, whereby additional microbubbles may be generated and the microbubbles may be uniformly distributed in the wash water. In addition, the microbubbles passing through the first mixing space 642 collide with the second blocking surface 645 of the second mixing space 644 to prevent direct injection of the microbubbles once more and increase the amount of microbubbles generated. . Accordingly, it is possible to increase the amount of microbubbles generated to improve washing and rinsing power.

Here, referring to FIGS. 7 to 9 , first, the cabinet cover 14 includes a plate 140 , an input hole 141 , a detergent box accommodating part 142 , a nozzle unit installation groove 144 , and a nozzle unit coupling part. (146).

In the center of the plate 140 , an input hole 141 through which laundry can be put in a size corresponding to the diameter of the inner tub 22 may be formed. Through the input hole 141, the user can put the laundry.

The detergent box accommodating part 142 may be installed at a point around the input hole 141 of the plate 140 . The detergent box accommodating part 142 may be formed to correspond to the size and shape of the detergent box 30 so that the detergent box 30 can be opened and closed by sliding.

The nozzle unit installation groove 144 may be formed so that the nozzle unit 600 is installed at another point around the input hole 141 of the cabinet cover 14 .

The nozzle unit coupling part 146 may be provided on an outer bottom surface of the input hole 141 of the cabinet cover 14 so that the nozzle unit 600 can be coupled to the cabinet cover 14 . The nozzle unit coupling portion 146 may be formed with a hollow into which a bolt 670 to be described later can be inserted.

In addition, the washing machine 1 according to an embodiment of the present invention may further include a nozzle cover 650 for covering the nozzle unit. The nozzle cover 650 may cover a portion of the nozzle unit 600 disposed on the cabinet cover 14 to prevent the nozzle unit 600 from colliding with the laundry input into the input hole 141 . In addition, the nozzle cover 650 may be formed to protect the nozzle unit 600 and to add an aesthetic feeling to the user as a part exposed to the user. The nozzle cover 650 may include a shielding part 652 , a nozzle cover fixing part 654 , a coupling hole 655 , and a connection part 656 .

The shield 652 may shield a portion of the nozzle unit. The shielding part 652 is a cover part that covers the second blocking surface 645 and the discharge part 646 of the nozzle part 640 , and is a part that can be exposed to a user. The shielding part 652 may protect the discharge part 646 from the laundry being put in or withdrawn, and may add an aesthetic feeling to the user. The shielding part 652 is formed to correspond to the nozzle unit installation groove 144 formed in the plate 140 so that no gap is formed when the shielding part 652 is disposed in the nozzle unit installation groove 144, so that the plate (140) It is possible to prevent the internal structure from being exposed to the user, and to block other foreign substances from entering through the plate (140).

The nozzle cover fixing part 654 may be connected to the shielding part 652 by the connecting part 656 , and the nozzle cover fixing part 654 is a nozzle unit coupling part together with the nozzle unit 600 on the bottom surface of the plate 140 . (146) can be fixed. A coupling hole 655 to be inserted into the nozzle unit coupling part 146 may be formed in the nozzle cover fixing part 654 .

The washing machine 1 according to an embodiment of the present invention includes a bolt 670 for fixing the nozzle unit 600 to the nozzle unit coupling part 146 , and a bolt 670 that is inserted into the bolt 670 and generated from the nozzle unit 600 . It may further include a vibration-proof rubber 660 to absorb vibration.

The vibration-proof rubber 660 may include a nozzle part fitting groove 662 , a damping part 664 , and a bold head support part 666 .

The nozzle part fitting groove 662 is provided on one end bar of the anti-vibration rubber 660 in the bottom surface direction of the cabinet cover 14 , and a part of the nozzle unit 600 may be fitted thereinto. Specifically, the nozzle part fitting groove 662 may be formed around the outer peripheral surface of the vibration-proof rubber 660 . The nozzle unit fixing part 649 is inserted into the nozzle part fitting groove 9662 so that the nozzle unit 600 may be fixed. Accordingly, the nozzle part fitting groove 662 may be formed to correspond to the size and shape of the hole formed in the nozzle unit fixing part 649 .

The damping part 664 is provided between the nozzle part fitting groove 662 formed at one end and the bolt head support part 666 formed at the other end, and is formed to have a curvature in the shape of a jar, so that it can be elastically deformed. The damping part 664 is elastically deformed in the longitudinal direction of the vibration-proof rubber 660 (that is, in the direction from the nozzle part fitting groove 662 to the bolt head support part 666 direction), and the vibration generated in the washing machine 1 and the microbubble generator Vibration and vibration generated in the nozzle unit 600 may be absorbed by (BG).

The bolt head support 666 may be provided at the other end of the anti-vibration rubber 660 to support the head of the bolt 670 . The bolt head support 666 may be in contact with and support one surface of the bolt head 670 .

The bolt 670 may include a bolt head 672 and an anti-vibration rubber insert 674 . The bolt 670 may be inserted into the nozzle part fitting groove 662 from the bolt head support part 666 of the vibration-proof rubber 660 . Accordingly, when the bolt 670 is inserted, the bolt head 672 may be supported in contact with the bolt head support 666 . The anti-vibration rubber insert 674 is formed in the middle portion of the bolt 670 and may be a part into which the anti-vibration rubber 660 is inserted.

The bolt 670 may sequentially pass through the vibration-proof rubber 660 , the nozzle unit 600 , and the nozzle cover 650 to be fixed to the nozzle unit coupling part 146 . Specifically, the bolt 670 passes through the insertion hole formed in the center of the vibration-proof rubber 660 , passes through the nozzle unit fixing part 649 of the nozzle unit 600 , and the nozzle cover fixing part of the nozzle cover 650 . After passing through the coupling hole 655 formed in 654 , it may be inserted and fixed in the hollow formed in the nozzle unit coupling part 146 .

Accordingly, the nozzle unit 600 may be disposed to enter the input hole 141 of the cabinet cover 14 and be positioned above the inner tub 22 . Accordingly, the microbubbles generated in the dissolution unit 500 and the nozzle unit 600 may be supplied into the inner tub 22 in which washing is performed without extinction.

In addition, the drain unit 700 may discharge the wash water remaining in the dissolution unit 500 to the main drain hose 34 after the supply of wash water including microbubbles is completed. The drain unit 700 may be disposed below the dissolution unit 500 , and the drain unit 700 is located at a point located downstream of the main drain valve 36 of the main drain hose 34 . The drained washing water can be discharged. Thereby, drainage from the drain unit 700 can be achieved regardless of the operation of the main drain valve 36 .

Here, referring to FIGS. 2, 9, and 10, the drain unit 700 includes a first body 710, a second body 720, a diaphragm 730, a diaphragm support 740, and a gasket ( 750) may be included.

Specifically, the drain unit 700 is connected to the dissolution unit 500 and the first body 710 into which wash water is introduced, and the first body 710 is coupled to the first body 710 and connected to the main drain hose 34 to drain the wash water. It may include a second body 720 that discharges.

The drainage unit 700 is provided between the first body 710 and the second body 720 as well as the first body 710 and the second body 720 and flows in through the first body 710 . The diaphragm 730 is provided between the first body 710 and the second body 720 and is elastically deformed by the washing water and has a first hole 736 through which the wash water can pass, and the diaphragm 730 is provided. ) may include a diaphragm support 740 having a second hole 748 that is selectively shielded by elastic deformation.

The first body 710 and the second body 720 may be screwed together, and for this purpose, a female threaded part 714 is formed in the first body 710 , and a male threaded part 724 is formed in the second body 720 . can be formed. However, the coupling method of the first body 710 and the second body 720 is not limited to screw coupling, and various coupling methods such as mold coupling and bolt coupling may be applied. The first body 710 may include a dissolution unit connection 712 connected to the dissolution unit 500 . The dissolution unit connection part 712 may be formed to extend to the opposite side to which the second body 720 is fastened to the first body 710, and the dissolution unit connection part 712 is connected to the first drain line (L3) and the dissolution unit Wash water remaining in 500 may be drained.

The second body 720 may include a main drain hose connecting part 722 connected to the main drain hose 34 and a diaphragm receiving part 726 . The main drain hose connection part 722 may be formed to extend to the opposite side to which the first body 710 is fastened to the second body 720 . The main drain hose connection part 722 may be connected to the second drain line L4 to drain the wash water.

At this time, the center of the inlet and outlet of the dissolution unit connecting portion 712, the inlet and outlet of the main drain hose connecting portion 722 may be located on the same straight line. Accordingly, the wash water drained through the dissolution unit connection part 712 may be smoothly drained to the main drain hose connection part 722 .

The diaphragm receiving part 726 is hollow formed inside the second body 720 , and the earphragm 730 and the diaphragm supporting part 740 may be accommodated therein. Accordingly, the diaphragm 730 and the diaphragm support 740 are formed to have diameters corresponding to the diameters, so that the diaphragm 730 and the diaphragm support 740 can be stably inserted.

The first hole 736 formed in the diaphragm 730 and the second hole 748 formed in the diaphragm support 740 may be a passage through which wash water for drainage passes. The diaphragm 730 and the diaphragm support 740 may drain the wash water or block the drainage while being spaced apart or in contact with each other by hydraulic pressure. Specifically, the diaphragm 730 is elastically deformed to block the second hole 748 of the diaphragm support 740 when the water supply pressure of the wash water is greater than the preset value, and returns to its original state when it is less than the preset value. The second hole 748 may be opened. (Here, the preset value may be a pressure value according to the load of wash water supplied from the water supply valve unit 32 to the dissolution unit 500)

First, the diaphragm 730 may include an elastically deformable part 732 , a locking groove 733 , a shielding part 734 , a fixing part 735 , and a first hole 736 .

The elastic deformation part 732 is elastically deformed by the water supply pressure of the wash water and can return to its original state, and has a 'U' shape protruding toward the dissolution unit connection part 712 along the circumference of the shielding part 734 . It can have a cross section. In addition, the elastically deformable part 732 may connect the fixing part 735 and the shielding part 734 .

One or more first holes 736 may be formed in the shielding part 734 . Specifically, a plurality of first holes 736 may be formed along the circumference of the shielding portion 734, and the central portion of the shielding portion 734 formed between the plurality of first holes 736 is located in the second hole ( 748) can be shielded. In order to shield the second hole 748 , the shielding part 734 may be formed to be larger than the diameter of the second hole 748 .

The shielding part 734 may shield the second hole 748 of the diaphragm support part 740 by the pressure of the wash water provided to the drain unit 700 . In detail, wash water having a pressure above a certain level to the drain unit 700, for example, wash water supplied to the dissolution unit 500 by the water supply valve unit 32, is moved to the drain unit 700 and moved to the diaphragm 730 When pressure is applied to the , the shielding part 734 is moved toward the diaphragm support 740 as the elastically deformable part 732 is deformed, and the shielding part 734 and the diaphragm support 740 come into contact with each other and the second hole 748. This can be shielded. Conversely, when no pressure is applied to the drain unit 700, specifically, when wash water is not supplied from the water supply valve unit 32, the elastic deformation unit 732 returns the shielding unit 734 to its original position, Accordingly, the second hole 748 may be opened.

The fixing part 735 is provided along the circumference of the shielding part 734 and may be fixed to the diaphragm support part 740 . The fixing part 735 extends from the elastically deformable part 732 to the diaphragm support part 740 side, so that the fixing part 735 of the diaphragm 730 and the seating part 742 of the diaphragm support part 740 can be contacted and supported. . At this time, the locking groove 733 is formed in the fixing part 735 so that the locking part 746 formed in the diaphragm support part 740 can be caught, whereby the diaphragm 730 and the diaphragm support part 740 are stably fixed. can be

The diaphragm support part 740 is connected to the second hole 748 through which the wash water is drained, the support rib 744 that is fixed in close contact so as not to fluctuate inside the second body 720, and the support rib 744 and is connected to the diaphragm 730 ) may include a seating portion 742 that can be seated and fixed.

The seating part 742 is in contact with the connection part of the diaphragm 730 to seat the diaphragm 730, and the support rib 744 may be formed to support the diaphragm 730 in contact with the seating part 742. .

In addition, the seating part 742 may include a locking part 746 so that the diaphragm 730 and the diaphragm support part 740 are hooked and fixed. The locking part 746 may be fitted and fixed in the locking groove 733 of the diaphragm 730 .

Here, the diaphragm 730 and the first hole 736 and the second hole 748 of the diaphragm support part 740 may be disposed so as to be displaced from each other. Accordingly, the second hole 748 may be shielded or opened according to the elasticity of the elastically deformable part 732 .

In addition, the drainage unit 700 may include a gasket 750 that is inserted into the dissolution unit connection part 712 side in the space formed inside the first body 710 and is pressed by the end of the second body 720 . . The gasket 750 is formed as an O-ring, and is disposed around the end of the dissolution unit connection part 712 side of the first body 710 to prevent leakage of wash water.

In the drainage unit 700 having the above configuration, when washing water is supplied from the water supply valve unit 32 to the dissolution unit 500 , the wash water flowing into the dissolution unit 500 moves to the drainage unit 700 . to apply pressure to the diaphragm 730 . (Here, the preset pressure may be a pressure according to the load of wash water remaining in the dissolution unit 500 when there is no supply of wash water from the water supply valve unit 32 to the dissolution unit 500) By this, When washing water flows from the dissolution unit 500 to the drainage unit 700 at a pressure greater than a preset pressure, the diaphragm 730 provided in the drainage unit 700 is elastically deformed to a second hole through which the washing water is discharged ( 748) can be blocked. Accordingly, the washing water supplied to the dissolution unit 500 may be filled, and the washing water in which the gas is dissolved may be supplied to the nozzle unit 600 .

On the other hand, when washing water is not supplied from the water supply valve unit 32 , the elastically deformable part 732 returns the shielding part 734 to the original position, and accordingly, the second hole 748 is opened to drain the washing water. can do.

Accordingly, the drainage unit 700 according to the present embodiment can operate reliably while reducing the manufacturing cost by configuring the microbubble generator with a simple structure.

Hereinafter, actions and effects of the washing machine 1 and the microbubble generator BG according to an embodiment of the present invention, and a method of supplying wash water including microbubbles will be described.

First, wash water may be supplied from an external water supply source through the water supply valve unit 32 . Next, the gas may be dissolved in the wash water supplied from the dissolution unit 500 .

Here, in order to dissolve the gas in the wash water in the dissolution unit 500 , the water supply line connection part 532 formed in the horizontal direction of the cap 530 from the water supply valve unit 32 positioned above the dissolution unit 500 . Wash water is supplied along the , and the running direction of the wash water supplied in the horizontal direction of the cap 530 can be switched to a vertical direction inside the cap 530 by the water supply direction changing part 534 of the cap 530 . there is. Wash water uniformly discharged by the water supply direction changing unit 534 may overflow after filling the inner tube 520 . Wash water overflowing from the inner tube 520 may enter the space between the inner tube 520 and the outer tube 510 so that the gas may be dissolved in the wash water.

At this time, in the drainage unit 700, the diaphragm 730 is elastically deformed by the water supply pressure supplied to the dissolution unit 500 from the water supply valve unit 32, and thus the second hole 748 formed in the diaphragm support part 740. This can be blocked. Accordingly, in the wash water supplied from the water supply valve unit 32 , gas may be dissolved in the dissolution space of the dissolution unit 500 .

Wash water in which the gas is dissolved by this process is supplied from the dissolution unit 500 to the nozzle unit 600, and the nozzle unit 600 may split the air bubbles included in the wash water to form fine bubbles.

Bubbles formed by dissolving gas in wash water in the dissolution unit 500 are introduced into the pressurized space 615 provided in the body 610 of the nozzle unit 600 and are pressurized, than the pressurized space 615 in the pressurized state. As it enters the inlet 624a of the decomposing part 624 having a small diameter, the flow rate may be increased. In addition, the bubble having an increased flow rate may be split into fine bubbles as the flow is slowed while passing through the outlet 624b extending from the inlet 624a and the pressure is increased. Some of the fine bubbles discharged from the decomposing unit 624 are not directly injected by the first blocking surface 643 provided in the nozzle unit 640, but are injected into the first mixing space 642 to cause collisions between the bubbles. The amount of microbubble generation may increase. Wash water discharged from the first mixing space 642 passes through the second mixing space 644 , and direct injection is prevented from the second blocking surface 645 once again, and after the amount of microbubbles is increased, the nozzle unit 600 is It may be discharged through the discharge unit 646 . At this time, as the inner surface of the discharge unit 646 on the second blocking surface 645 , the flow of discharged fine bubbles may be changed into the inner tank 22 . Accordingly, the nozzle unit 600 may discharge the wash water including the microbubbles formed in this way to the inner tub 22 in which the laundry is accommodated.

On the other hand, when the supply of wash water including microbubbles is completed, the wash water remaining in the dissolution unit 500 may be drained to the main drain hose 34 by the drain unit 700 . In detail, when the wash water flows from the dissolution unit 500 to the drain unit 700 at a pressure less than a preset pressure (that is, a pressure smaller than the water supply pressure provided from the water supply valve unit 32), the dissolution unit 500 ), since the wash water stored in the diaphragm 730 does not apply a load to the diaphragm 730 , the elastically deformable portion 732 of the diaphragm 730 returns to its original state to open the second hole 748 , thereby draining the water.

Above, the washing machine and the microbubble generator of the washing machine according to the embodiment of the present invention have been described as specific embodiments, but this is only an example, and the present invention is not limited thereto, and the widest scope according to the basic idea disclosed in the present specification is provided. should be interpreted as having A person skilled in the art may implement a pattern of a shape not specified by combining or substituting the disclosed embodiments, but this also does not depart from the scope of the present invention. In addition, those skilled in the art can easily change or modify the disclosed embodiments based on the present specification, and it is clear that such changes or modifications also fall within the scope of the present invention.

1: washing machine 10: cabinet
12: base 14: cabinet cover
16: door 20: outer basket
22: inner basket 140: plate
141: input hole 144: nozzle unit installation groove
146: nozzle unit coupling unit 500: dissolution unit
510: outer tube 520: inner tube
522: overflow part 524: residual water discharge hole
530: cap 532: water supply line connection
534: water supply direction switching unit 536: air pocket unit
539: outer cylinder fixing unit 600: nozzle unit
610: body 612: dissolution unit connection part
614: bubble generating unit receiving unit 615: pressurized space
618: nozzle unit connection unit 620: bubble generation unit
622: housing 624: disassembly part
630: gasket 640: nozzle unit
642: first mixing space 643: first blocking surface
644: second mixing space 645: second blocking surface
646: discharge part 648: body connection part
649: nozzle unit fixing part 650: nozzle cover
652: shielding portion 654: nozzle cover fixing portion
655: coupling hole 656: connection part
660: anti-vibration rubber 670: bolt
700: valve unit 710: first body
712: dissolution unit connection unit 720: second body
722: main drain hose connection 730: diaphragm
732: elastic deformation part 733: locking groove
734: shielding part 735: fixed part
736: first hole 740: diaphragm support
742: seating portion 744: support rib
746: locking part 748: second hole

Claims (17)

cabinet;
an outer tub accommodated inside the cabinet and accommodating wash water;
an inner tub accommodated inside the outer tub, in which laundry is accommodated;
a water supply valve unit provided in the cabinet and connected to an external water supply source to receive wash water;
a cabinet cover provided on the upper side of the cabinet and having an input hole for loading laundry;
and a microbubble generator for receiving washing water from the water supply valve unit to generate microbubbles and supplying them to the laundry space,
The microbubble generator,
a dissolution unit dissolving gas in the wash water supplied from the water supply valve unit and supplying it to the nozzle unit;
a nozzle unit that receives wash water in which gas is dissolved from the dissolution unit to generate fine bubbles, and is installed at a point around the input hole to discharge wash water into the inner tub immediately after the generation of fine bubbles; and
and a drainage unit for discharging wash water remaining in the dissolution unit after the supply of wash water is completed,
The nozzle unit is
a body part receiving wash water in which gas is dissolved, and including a pressurized space in which the wash water is pressurized; and
A bubble generating unit communicating with the pressurized space, the washing water passing through, and including a plurality of decomposing units generating fine bubbles; includes,
The decomposing unit is disposed inside the housing of the bubble generating unit at a predetermined interval along the circumference of the housing, and the inlet and the outlet are centered on the same line so that the diameter increases along the flow direction of the fluid flowing from the pressurized space. in, wherein the inlet is provided to have a smaller cross-sectional area than the outlet,
washer. According to claim 1,
A washing machine having a nozzle unit coupling part provided on an outer bottom surface of the input hole and coupled to the nozzle unit in the cabinet cover. 3. The method of claim 2,
A part of the nozzle unit is disposed inside the input hole to be positioned above the inner tub. 4. The method of claim 3,
A nozzle cover is provided on the cabinet cover to cover a part of the nozzle unit to prevent the nozzle unit from collided with laundry being fed into the input hole,
The nozzle cover is fixed to the nozzle unit coupling part together with the nozzle unit. 5. The method of claim 4,
A nozzle unit installation groove in which the nozzle unit is installed is formed around the input hole of the cabinet cover,
The nozzle cover,
a shield for shielding a portion of the nozzle unit;
a nozzle cover fixing part fixed to the nozzle unit coupling part together with the nozzle unit; and
and a connection part that connects the shielding part and the nozzle unit fixing part and is fitted into the nozzle unit installation groove. 5. The method of claim 4,
a bolt for fixing the nozzle unit to the nozzle unit coupling part; and
and a vibration-proof rubber fitted to the bolt to absorb vibrations generated from the nozzle unit. 7. The method of claim 6,
The anti-vibration rubber,
a nozzle part fitting groove provided at one end and into which a part of the nozzle unit is fitted;
a bolt head support portion provided on the other end and on which the head of the bolt is supported; and
and a damping part provided between the nozzle part fitting groove and the bolt head support part and elastically deformed in an extension direction of the bolt to absorb vibration. 7. The method of claim 6,
The bolt sequentially passes through the vibration-proof rubber, the nozzle unit, and the nozzle cover to be fixed to the nozzle unit coupling part. delete According to claim 1,
The dissolution unit,
an outer cylinder having an open side and providing a dissolution space in which gas is dissolved in wash water;
an inner cylinder inserted into the dissolution space, at least a portion of which is installed to be spaced apart from the inner circumferential surface of the outer cylinder; and
and a cap for shielding the opening of the outer cylinder and supplying wash water supplied in one direction to the other direction forming a predetermined angle with the one direction into the inner space of the inner cylinder,
The gas accommodated in the outer cylinder is dissolved in the wash water by the water supply pressure of the wash water overflowing from the inner cylinder. According to claim 1,
The nozzle unit is
A blocking unit for blocking at least a portion of the flow of wash water discharged from each of the decomposing units is not directly sprayed, and the fine bubbles generated in the decomposing unit are discharged from the decomposing unit and mixed with the washing water whose flow is slowed. The washing machine further includes a nozzle unit for discharging wash water in which the fine bubbles are dissolved into the washing space, the washing machine including a fine bubble mixing unit for washing the washing machine. According to claim 1,
Further comprising a main drain hose connected to the outer tub to drain the wash water to the outside,
The drain unit is
a first body connected to the dissolution unit to receive wash water;
a second body coupled to the first body and connected to the main drain hose to discharge wash water;
a diaphragm provided between the first body and the second body, elastically deformed by wash water flowing through the first body, and having a first hole through which the wash water can pass; and
and a diaphragm support provided between the first body and the second body and having a second hole selectively shielded by elastic deformation of the diaphragm. A micro-bubble generator of a washing machine that is installed in a washing machine to receive wash water, generate micro-bubbles, and then supply wash water containing micro-bubbles to an inner tub in which laundry is accommodated,
a dissolution unit that receives wash water and dissolves the gas stored therein in the wash water;
The washing water in which the gas is dissolved is supplied from the dissolution unit to generate fine bubbles, the wash water containing the fine bubbles is discharged into the inner tub, and an input hole is provided on the upper side of the cabinet of the washing machine and for inserting the laundry. a nozzle unit installed on a cabinet cover having a nozzle unit, a part of which is exposed to the inside of the input hole; and
and a drain unit for draining the wash water remaining in the dissolution unit to a main drain hose of the washing machine after the supply of wash water containing fine bubbles is completed,
The nozzle unit is
a body part receiving wash water from the dissolution unit and including a pressurizing space in which the supplied wash water can be pressurized; and
a bubble generating unit disposed on one side of the pressurized space and communicating with the pressurized space, the washing water passing through and including a plurality of decomposing units in which fine bubbles are generated; and
The decomposing unit is disposed inside the housing of the bubble generating unit at a predetermined interval along the circumference of the housing, and the inlet and the outlet are centered on the same line so that the diameter increases along the flow direction of the fluid flowing from the pressurized space. in, wherein the inlet is provided to have a smaller cross-sectional area than the outlet,
Microbubble generator in washing machine. 14. The method of claim 13,
and a nozzle cover installed on the cabinet cover and configured to cover a portion of the nozzle unit exposed inside the input hole to prevent the nozzle unit from being exposed upward. 14. The method of claim 13,
The nozzle unit further includes a discharge unit for discharging wash water,
The microbubble generator of the washing machine is formed in a shape in which the discharging part becomes wider toward the discharge port. 14. The method of claim 13,
a bolt for fixing the nozzle unit to a nozzle unit coupling part formed on an outer bottom surface of the input hole of the cabinet cover; and
and a vibration-proof rubber inserted into the bolt to absorb vibrations generated from the nozzle unit. 17. The method of claim 16,
The anti-vibration rubber,
a nozzle part fitting groove provided at one end and into which a part of the nozzle unit is fitted;
a bolt head support portion provided on the other end and on which the head of the bolt is supported; and
and a damping part provided between the nozzle part fitting groove and the bolt head support part and elastically deformed in an extension direction of the bolt to absorb vibration.

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