CN109706684B - Washing machine - Google Patents

Abstract

The invention provides a washing machine. The synergistic effect of the fine bubble water and the softener is exerted. The washing machine comprises a water containing barrel, a rotary barrel, a connecting port, a water filling box, a softener side water supply path which reaches the water containing barrel and the rotary barrel from the connecting port through a softener containing part in a box main body, a detergent side water supply path which reaches the water containing barrel and the rotary barrel from the connecting port through a detergent containing part in the box main body, and a fine bubble generating device which is arranged in the middle of the detergent side water supply path and enables water passing through the detergent side water supply path to contain fine bubbles. The softener-side water supply path is not provided with a fine bubble generating device, and the rinsing process using the softener contained in the softener containing part has a period of water filling from the water supply source to the water barrel and the rotary barrel through the softener-side water supply path in a state that the water from the water supply source is filled into the water barrel and the rotary barrel through the detergent-side water supply path.

Description

Washing machine

Technical Field

Embodiments of the present invention relate to a washing machine.

Background

In recent years, fine bubbles having a size of several tens of nm to several μm, which are called micro bubbles or nano bubbles, have been drawing attention, and it is considered that fine bubble water containing many fine bubbles is used in a washing machine. However, in the conventional structure, the synergistic effect of the fine bubble water and the softener is not sufficiently exhibited in the rinsing process using the softener.

Prior art documents:

patent documents:

patent document 1: japanese patent laid-open publication No. 2017-113395

Disclosure of Invention

Therefore, the washing machine capable of exerting the synergistic effect of the fine bubble water and the softener is provided.

The washing machine of the embodiment comprises: a water containing barrel; a rotary tub rotatably provided in the water tub; a connection port connected to an external water supply source; a water injection cartridge having a cartridge main body connected to the connection port and into which water from the water supply source flows, a softener storage part provided in the cartridge main body and storing a softener, and a detergent storage part provided in the cartridge main body and storing a detergent; a softener-side water supply path from the connection port to the water tub and the rotary tub via the softener accommodating portion in the cartridge main body; a detergent-side water supply path from the connection port to the tub and the tub through the detergent accommodating part in the cartridge body; and a fine bubble generating device which is arranged in the middle part of the detergent side water supply path and makes the water passing through the inside contain fine bubbles. The fine bubble generating means is not provided in the conditioner-side water supply path, and the rinsing process using the conditioner contained in the conditioner storage portion has a period during which water from the water supply source is filled into the tub or the tub through the conditioner-side water supply path in a state in which the water from the water supply source is filled into the tub or the tub through the detergent-side water supply path.

Drawings

Fig. 1 is a sectional view showing a schematic structure of a washing machine according to a first embodiment from a front side;

fig. 2 is a view showing a schematic structure of a water filling box in the washing machine according to the first embodiment;

fig. 3 is a perspective view showing the fine bubble generating apparatus as viewed from the downstream side with respect to the first embodiment;

fig. 4 is an exploded perspective view showing the fine bubble generating apparatus as viewed from the downstream side with respect to the first embodiment;

fig. 5 is an exploded perspective view showing the fine bubble generating apparatus as viewed from the upstream side with respect to the first embodiment;

FIG. 6 is a sectional view showing a minute bubble generating apparatus according to the first embodiment;

FIG. 7 is an enlarged cross-sectional view of the fine bubble generator taken along line X7-X7 of FIG. 6 in the first embodiment;

fig. 8 is a block diagram showing an electrical configuration with respect to the washing machine of the first embodiment;

fig. 9 is a view showing an open/close state of each of the water inlet valve and the water discharge valve in the washing operation concerning the washing machine of the first embodiment;

FIG. 10 is a view showing a schematic configuration of a water filling box according to another example of the first embodiment;

fig. 11 is a view showing a schematic structure of a water filling box in the washing machine according to the second embodiment;

FIG. 12 is a diagram showing the relationship between the gap sizes of the first and second fine bubble generating devices with respect to the washing machine of the second embodiment;

fig. 13 is a block diagram showing an electrical configuration with respect to the washing machine of the second embodiment;

fig. 14 is a diagram showing a water filling speed that is a reference in an open/close state of each water inlet valve in the washing machine according to the second embodiment;

fig. 15 is a flowchart showing the control executed by the control device at the time of water supply with respect to the washing machine of the second embodiment.

Detailed Description

Hereinafter, a plurality of embodiments will be described with reference to the drawings. In addition, substantially the same elements in the respective embodiments are denoted by the same reference numerals, and description thereof is omitted.

(first embodiment)

The first embodiment will be described below with reference to fig. 1 to 9.

First, a schematic structure of the washing machine 10 will be described with reference to fig. 1 to 3. The washing machine 10 shown in fig. 1 is provided with an outer case 11, a top cover 12, a tub 13, a tub 14, a pulsator 15, a motor 16, and a water filling device 20. The vertical lower side, which is the installation surface side of washing machine 10, is set to the lower side of washing machine 10, and the vertical upper side, which is the opposite side to the installation surface, is set to the upper side of washing machine 10. The left-right direction of the drawing sheet of fig. 1 is the left-right direction of the washing machine 10. The washing machine 10 is a so-called vertical axis type washing machine in which the rotation axis of the tub 14 is oriented in the vertical direction. The washing machine is not limited to a vertical-axis type, and may be a horizontal-axis type so-called drum-type washing machine in which the rotation axis of the tub is horizontal or inclined downward toward the rear.

The outer box 11 is formed in a rectangular box shape as a whole, for example, from a steel plate. The top cover 12 is made of, for example, synthetic resin, and is provided on the upper portion of the outer box 11. The water tub 13 and the rotary tub 14 function as a washing tub and a spin-drying tub for storing laundry. The tub 13 is provided in the outer case 11. The tub 13 and the tub 14 are formed in a container shape with an upper surface opened. The tub 14 has a plurality of small holes 141, and water is shuttled between the tub 13 and the tub 14 through the small holes 141. Further, a drain port, not shown, is formed at the bottom of the tub 13.

The motor 16 is connected to the rotary tub 14 via a clutch mechanism not shown. A clutch mechanism, not shown, selectively transmits rotation of the motor 16 to the rotary tub 14. In addition, the motor 16 is directly connected to the pulsator 15. The rotation of the motor 16 is continuously transmitted to the pulsator 15. The motor 16 and a clutch mechanism not shown transmit the driving force of the motor 16 to the pulsator 15 in a state where the rotation of the rotary tub 14 is stopped during washing and rinsing, and directly drive the pulsator 15 to rotate forward and backward at a low speed. On the other hand, the motor 16 and a clutch mechanism, not shown, transmit the driving force of the motor 16 to the rotary tub 14 during dehydration or the like, and rotationally drive the rotary tub 14 and the pulsator 15 in one direction at high speed.

The water filling device 20 is provided on the upper portion of the outer box 11 and inside the top cover 12. The water injection device 20 has a connection port 21, a water injection port 22, a softener side water inlet valve 23, two detergent side water inlet valves 24, a regulator 25, a water injection cartridge 30, and two fine bubble generating devices 40. The connection port 21 is connected to an external water supply source such as a tap of a tap water pipe through a pipe not shown. As shown in fig. 2, the downstream side of the connection port 21 is branched into a plurality of branches and connected to the water injection cartridge 30. In the present embodiment, the downstream side of the connection port 21 is branched into three paths and connected to the water injection cartridge 30.

The water filling cartridge 30 allows water supplied from the connection port 21 to pass through the water filling cartridge 30, and thus water is filled from the water filling port 22 into the water tub 13 and the tub 14. The water injection cartridge 30 has a cartridge main body 31, a detergent storage portion 33, and a softener storage portion 32. The cartridge main body 31 is formed in a synthetic resin container shape, for example. The upstream side of the cartridge main body 31 is connected to the connection port 21 and water from an external water supply source flows in. The external water supply source is not limited to a tap water pipe, and may be, for example, a bathtub. The downstream side of the cartridge main body 31 is connected to the water inlet 22, and the water flowing into the cartridge main body 31 is supplied from the water inlet 22 into the water tub 13 and the water tub 14.

The softener storage portion 32 is formed in a container shape with an open top surface, for example, and is provided inside the cartridge main body 31. The softener storage portion 32 is configured to be extractable to the front side of the washing machine 10 with respect to the cartridge main body 31. The softener storage portion 32 has a siphon structure portion 321. The inside of the softener storage portion 32 communicates with the bottom side in the cartridge main body 31 via the siphon structure portion 321. When a cleaning operation using a softener is performed, the user draws out the softener storage portion 32 and puts the softener into the softener storage portion 32.

The detergent storage portion 33 is formed in a container shape with an open top surface, for example, and is provided inside the cartridge main body 31. The detergent storage portion 33 is configured to be extractable to the front side of the washing machine 10 with respect to the cartridge main body 31. Further, the detergent containing section 33 has a water passage section 331. The water passage 331 is formed to penetrate through the container-shaped bottom of the detergent storage 33 and opens downward. The inside of detergent containing unit 33 communicates with the bottom side in cartridge main body 31 via water passage 331. Further, the bottom of detergent containing unit 33 is inclined downward toward water passing unit 331. When an operation using a detergent is performed, the user draws out the detergent storage portion 33 and puts the detergent into the detergent storage portion 33.

In the case of the present embodiment, one of the three paths branched from the connection port 21 is configured as a path in which water supplied from an external water source to the connection port 21 is injected from the water injection port 22 to the tub 13 and the tub 14 via the softener storage portion 32 of the water injection cartridge 30. Two of the three paths branched from the connection port 21 are paths through which water supplied from an external water source to the connection port 21 is injected from the water injection port 22 to the water tub 13 and the tub 14 via the detergent storage portion 33 of the water injection cartridge 30.

In the following description, as shown by arrow a in fig. 2, a path from the connection port 21 to the water tub 13 and the tub 14 through the softener storage portion 32 in the cartridge main body 31 from the water injection port 22 is referred to as a softener-side water supply path a. As shown by arrow B in fig. 2, a path from the connection port 21 to the tub 13 and the tub 14 through the water filling port 22 via the detergent containing portion 33 in the cartridge main body 31 is referred to as a detergent-side water supply path B. These softener-side water supply path a and detergent-side water supply path B are merged in the cartridge main body 31 on the downstream side of the softener storage portion 32 and the detergent storage portion 33.

Both the softener side water inlet valve 23 and the two detergent side water inlet valves 24 are liquid on-off valves that can be opened and closed electromagnetically. The softener side water feed valve 23 is provided in the middle of the softener side water supply path a and between the connection port 21 and the softener storage portion 32 to open and close the softener side water supply path a. The two detergent side water feed valves 24 are provided in the middle of the detergent side water supply path B and between the connection port 21 and the detergent storage portion 33, and open and close the respective detergent side water supply paths B.

The regulator 25 is provided in a midway portion of the softener-side water supply path a and downstream of the softener-side water inlet valve 23, and in this case, is provided between the softener-side water inlet valve 23 and the softener storage portion 32. The regulator 25 is formed of, for example, a so-called water saving packing (water saving packing), and has a function of reducing the flow rate and flow rate of water supplied from the connection port 21. The water supplied from the connection port 21 is supplied to the softener storage portion 32 side in a state where the flow rate and flow rate are reduced by the regulator 25.

The two fine bubble generating devices 40 are provided in the middle of the two detergent-side water supply paths B and on the downstream side of the detergent side inlet valve 24, and in this case, are provided between the detergent side inlet valve 24 and the detergent storage part 33. The fine bubble generating means 40 is for making the water passing through the inside contain fine bubbles.

The "fine bubbles" in the present embodiment are so-called microbubbles, and are a concept including, for example, microbubbles having a diameter of about 1 μm to several hundred μm and ultrafine microbubbles having a diameter of 1 μm or less. Further, the fine bubble water refers to water containing fine bubbles by the fine bubble generating means 40, in other words, water containing a large amount of the fine bubbles as compared with normal tap water without any treatment. In particular, in the present embodiment, the water containing fine bubbles means water containing a large amount of ultrafine micro bubbles among the micro bubbles in a main body. The ultrafine microbubbles have a property of being able to stay in water for a long time and easily entering deep into the gaps of the fibers due to their minute size.

When a liquid such as water passes through the inside of the fine bubble generating device 40 in the direction of the hollow arrow in fig. 6, the fine bubble generating device 40 rapidly reduces the pressure of the liquid by the principle of the venturi tube, and causes gas dissolved in the liquid, for example, air to be precipitated and fine bubbles to be generated. The fine bubble generating device 40 of the present embodiment can generate a large amount of fine bubbles including ultrafine microbubbles in particular.

As shown in fig. 3 to 6, the entire fine bubble generating device 40 is formed in a cylindrical shape having a flange. In fig. 1 and 2, the fine bubble generating device 40 is inserted into, for example, a pipe connecting the detergent side water inlet valve 24 and the water injection cartridge 30. The fine bubble generating device 40 is made of, for example, resin, and includes flow path members 50 and 60 and a collision portion 70, as shown in fig. 3 to 7. As shown in fig. 6, the flow path members 50 and 60 have flow paths 41 and 42 through which liquid can pass. The channels 41 and 42 are connected to each other to constitute 1 continuous channel.

When the flow paths 41 and 42 are regarded as 1 continuous flow path, the collision portion 70 is provided in the continuous flow paths 41 and 42. The flush protrusion 70 locally reduces the cross-sectional area of the flow paths 41 and 42, thereby generating fine bubbles in the liquid passing through the flow paths 41 and 42. In the present embodiment, the fine bubble generating device 40 is configured by combining two flow path members 50 and 60 that are separately configured. In the following description, the upstream flow path member 50 of the flow path members 50 and 60 is referred to as an upstream flow path member 50, and the downstream flow path member 60 is referred to as a downstream flow path member 60. Of the 2 passages 41 and 42, the upstream passage 41 is referred to as an upstream passage 41, and the downstream passage 42 is referred to as a downstream passage 42.

As shown in fig. 4 to 6, the upstream channel member 50 includes a flange portion 51, an intermediate portion 52, and an insertion portion 53. The flange portion 51 constitutes an upstream portion of the upstream flow path member 50. The intermediate portion 52 is a portion connecting the flange portion 51 and the insertion portion 53. The outer diameter of the intermediate portion 52 is smaller than the outer diameter of the flange 51. The insertion portion 53 constitutes a downstream side portion in the upstream side flow path member 50. The outer diameter of the insertion portion 53 is smaller than the outer diameter of the intermediate portion 52.

As shown in fig. 6, the upstream flow path member 50 has an upstream flow path 41 therein. The upstream flow path 41 includes a reduced diameter portion 411 and a straight portion 412. The reduced diameter portion 411 is formed in a shape having an inner diameter reduced from the inlet portion of the upstream flow path 41 toward the downstream side, i.e., toward the protrusion 70 side. That is, the reduced diameter portion 411 is formed in a conical pipe shape having a so-called conical shape in which the cross-sectional area of the upstream flow path 41, that is, the area through which the liquid can pass, is continuously and gradually reduced from the upstream side toward the downstream side. The straight portion 412 is provided downstream of the reduced diameter portion 411. The straight portion 412 is formed in a cylindrical shape, i.e., a so-called straight pipe shape, in which the inner diameter does not change, that is, the cross-sectional area of the flow path, that is, the area through which the liquid can pass does not change.

The protruding portion 70 is formed integrally with the upstream flow path member 50. In this case, the collision portion 70 is provided at the downstream end of the upstream flow path member 50. As shown in fig. 6 and 7, the protruding portion 70 is constituted by a plurality of protruding portions 71, in this case, 4 protruding portions 71. The projections 71 are arranged at equal intervals in the circumferential direction of the cross section of the flow path 41. In the following description, the cross section of the flow path 41 is defined as a cross section taken in a direction perpendicular to the flow direction of the liquid flowing through the flow path 41 or the like, that is, a cross section taken along the line X7-X7 in fig. 6. In addition, the circumferential direction of the flow path 41 refers to a circumferential direction with respect to the center of the cross section of the flow path 41 or the like.

Each of the projections 71 is formed in a bar shape or a plate shape projecting from the inner peripheral surface of the upstream flow path member 50 toward the center in the radial direction of the flow path 41. In the present embodiment, each of the projections 71 is formed in a rod shape having a sharp taper shape at a tip end portion thereof toward the center in the radial direction of the flow path 41 and a semi-cylindrical shape at a root portion thereof. The protrusions 71 are disposed so as to face each other with the tapered distal ends thereof spaced apart from each other by a predetermined distance. Thus, the minimum area portions of the flow paths 41 and 42 in the fine bubble generating device 40 are formed in a cross-shaped or X-shaped slit shape as a whole. In this case, as shown in fig. 7, the dimension between the distal ends of the two opposing projections 71 is referred to as a gap dimension L. In the case of the present embodiment, the gap dimension L is set to about 0.7 mm.

The downstream end of the upstream flow path 41 communicates with the outside of the upstream flow path 41 through the cross-shaped or X-shaped slits between the projections 71 constituting the protruding portion 70. The end surface on the downstream side of the collision portion 70, that is, the end surface 54 on the downstream side of the upstream flow path member 50 is configured to be flat as a whole as shown in fig. 4 and 6.

The downstream flow path member 60 is formed in a cylindrical shape as a whole as shown in fig. 3 to 5, and has the downstream flow path 42 therein as shown in fig. 6 and the like. As shown in fig. 6, the outer diameter of the downstream flow path member 60 is substantially equal to the outer diameter of the intermediate portion 52. As shown in fig. 6 and 7, the downstream flow path member 60 includes an inserted portion 61 and a deformed portion 62 therein.

As shown in fig. 6, the inserted portion 61 is provided in the downstream side flow path member 60 on the upstream side of the downstream side flow path 42. The inserted portion 61 is formed in a cylindrical shape. As shown in fig. 6 and the like, the inner diameter of the inserted portion 61 is slightly larger than the outer diameter of the insertion portion 53 of the upstream flow path member 50. Therefore, the insertion portion 53 of the upstream flow path member 50 can be inserted into the inserted portion 61 of the downstream flow path member 60.

As shown in fig. 5 and 7, the deformation portion 62 is provided to protrude from the inner surface of the inserted portion 61 toward the center in the radial direction of the downstream flow path member 60. In this case, the deformation portion 62 is formed in a shape of an elongated bar, so-called rib, extending in the flow direction of the downstream flow channel 42, that is, in the longitudinal direction of the downstream flow channel member 60. In the present embodiment, the downstream flow path member 60 includes four deformable portions 62. As shown in fig. 7, the deformation portions 62 are arranged at equal intervals in the circumferential direction of the inner circumferential surface of the inserted portion 61.

As shown in fig. 7, when the insertion portion 53 of the upstream flow path member 50 is inserted into the inserted portion 61 of the downstream flow path member 60, the deformation portion 62 is crushed and deformed by the outer peripheral surface of the inserted portion 61. Therefore, the periphery of the insertion portion 53 is pressed by the deformation portion 62. Thereby, the upstream flow path member 50 and the downstream flow path member 60 are connected in a state where the insertion portion 53 and the inserted portion 61 are pressed against each other.

In the present embodiment, the inserted portion 61 is formed in a conical shape, so-called cone shape, in which the inner diameter size is continuously and gradually reduced from the upstream side toward the downstream side. That is, the inner diameter dimension of the upstream end portion in the inserted portion 61 is larger than the inner diameter dimension of the downstream end portion in the inserted portion 61, and is larger than the outer diameter dimension of the insertion portion 53. Each of the deformation portions 62 is arranged along the inner surface of the tapered inserted portion 61 in an inclined manner such that the distance between the deformation portions 62 decreases from the upstream side to the downstream side.

In this case, the inner diameter of the upstream end portion on the inlet side of the inserted portion 61 is larger than the outer diameter of the insertion portion 53, and therefore the insertion portion 53 can be easily inserted into the inserted portion 61. Further, when the insertion portion 53 is press-fitted into the inserted portion 61, the outer side surface of the insertion portion 53 moves along the inclined deformation portion 62, and therefore the center of the insertion portion 53 and the center of the inserted portion 61 easily match. That is, in this case, the center in the radial direction of the upstream flow passage 41 and the center in the radial direction of the downstream flow passage 42 are likely to coincide with each other. As a result, the work of inserting the insertion portion 53 into the inserted portion 61 is facilitated. Instead of the deformation portion 62, the same configuration as the deformation portion 62 may be provided on the outer peripheral portion of the insertion portion 53. This can provide the same operational effects as those of the deformation portion 62.

In this configuration, when the softener side water inlet valve 23 shown in fig. 2 is opened, water supplied from an external water supply source to the connection port 21 flows through the softener side water supply path a. In this case, the fine bubble generating device 40 is not provided in the softener-side water supply path a. Therefore, when the softener side water inlet valve 23 is opened, the water that does not include fine bubbles and does not pass through the fine bubble generation device 40 flows into the cartridge main body 31 of the water injection cartridge 30 and falls into the softener storage portion 32. When the softener storage portion 32 is stored in a constant amount, the water in the softener storage portion 32 flows down to the bottom of the cartridge main body 31 through the siphon mechanism 321, and then the water is filled into the water tub 13 and the water drum 14 through the water filling port 22. At this time, if the softener is contained in the softener containing portion 32, the softener is flushed with water supplied through the softener-side water supply path a and flows down from the water inlet 22 into the water tub 13 and the rotary tub 14.

When each of the detergent side water inlet valves 24 is opened, water supplied from an external water supply source to the connection port 21 flows through the softener side water supply path a. In this case, the fine bubble generating device 40 is provided in the detergent side water supply path B. Therefore, when the detergent side water inlet valve 24 is opened, the fine bubble water containing the fine bubbles flows into the cartridge main body 31 of the water injection cartridge 30 through the fine bubble generating device 40, and flows down to the detergent storage portion 33. The fine bubble water that has flowed down to the detergent storage 33 flows down from the water flow portion 331 toward the bottom of the water filling cartridge 30, and then is filled into the water tub 13 and the water tub 14 from the water filling port 22. At this time, if the detergent is contained in the detergent containing portion 33, the detergent is washed by the fine bubble water supplied through the detergent side water supply path B, and flows down into the water tub 13 and the tub 14 from the water inlet 22.

In this case, the softener-side water supply path a and the detergent-side water supply path B merge in the cartridge main body 31 on the downstream side of the softener storage portion 32 and the detergent storage portion 33. Therefore, when the softener side water feed valve 23 and the detergent side water feed valve 24 are opened simultaneously, the water passing through the softener side water supply path a and the fine bubble water passing through the detergent side water supply path B are merged at the bottom of the cartridge main body 31, and water is supplied from the water supply port 22 into the water tub 13 and the water drum 14.

Here, in the present embodiment, the conditioner 25 is provided in the conditioner-side water supply path a without the fine bubble generating device 40. This is because there are cases where it is difficult to provide the fine bubble generating device 40 in the softener-side water supply path a. That is, although the water pressure of the water pipe is about 0.2 to 0.4MPa, if the water supplied from the connection port 21 is supplied into the softener storage portion 32 without being decompressed, the water potential is too strong, and the water flowing into the softener storage portion 32 overflows from the softener storage portion 32 or bounces at this point and splashes around. At this time, if the liquid softener is contained in the softener containing portion 32, the water having a strong water potential collides with the softener, and the liquid softener in the softener containing portion 32 is splashed around when the concentration is high. Further, when the softener having a high concentration of liquid is dried in a state of being adhered to the surroundings, it causes dirt, and is not preferable in terms of appearance and hygiene.

Therefore, a regulator 25 is provided in the middle of the softener-side water supply path a to reduce the pressure of the water supplied from the connection port 21. However, the amount of fine bubbles generated by the fine bubble generating means 40 is proportional to the applied water pressure. Therefore, if the fine bubble generating device 40 is provided in the softener-side water supply path a together with the regulator 25, the water pressure applied to the fine bubble generating device 40 becomes low, and the capability of the fine bubble generating device 40 provided in the softener-side water supply path a cannot be sufficiently exhibited. For this reason, it is difficult to provide the fine bubble generating device 40 in the softener-side water supply path a, and therefore the fine bubble generating device 40 is not provided in the softener-side water supply path a.

As shown in fig. 8, washing machine 10 includes a control device 17. The control device 17 is constituted by a microcomputer or the like, and controls the entire operation of the washing machine 10. The motor 16, the softener side water inlet valve 23, and the detergent side water inlet valve 24 are electrically connected to the controller 17, and are driven and controlled based on a control signal from the controller 17.

The washing machine 10 further includes a drain valve 18 and a water level sensor 19. The drain valve 18 opens and closes a drain port, not shown, formed in the bottom of the tub 13. The washing machine 10 can store water in the tub 13 by closing the drain valve 18, and discharge the water stored in the tub 13 by opening the drain valve 18. The water level sensor 19 is used to measure the water level of the water stored in the tub 13. The drain valve 18 and the water level sensor 19 are also electrically connected to the control device 17.

Next, the content of control of the cleaning operation by the controller 17 will be described with reference to fig. 9. In addition, the right arrows in fig. 9 show that the drain valve 18, the conditioner side water inlet valve 23, and the detergent side water inlet valve 24 are in an open state, respectively. When the control device 17 executes the washing operation, as shown in fig. 9, the washing process of step S11, the draining/dehydrating process of step S12, the rinsing process of step S13, the draining/dehydrating process of step S14, the final rinsing process of step S15, and the draining/dehydrating process of step S16 are sequentially executed. The water injection amount and the agitation time in the washing step of step S11 and the rinsing step of steps S13 and 15, and the dehydration time in the dehydration step of steps S12, S14 and S16 can be appropriately changed according to the amount of laundry or arbitrarily set by the user.

If the control device 17 performs the washing process of step S11, both the detergent side water intake valves 24 are opened in a state where the drain valve 18 is closed. Thus, the water passing through the detergent-side water supply path B is supplied into the water tub 13 and the tub 14, and the detergent contained in the detergent containing portion 33 is flushed by the water passing through the detergent-side water supply path B and is introduced into the water tub 13 and the tub 14. The control device 17 drives the motor 16 in parallel with the water supply to the tub 13 and the tub 14, and rotates the pulsator 15 relative to the tub 14. Thereby, the detergent put into the tub 13 and the tub 14 is dissolved to generate a washing liquid, and the laundry is agitated and washed in the washing liquid.

At this time, the water passing through the detergent-side water supply path B passes through the fine bubble generating device 40 to become fine bubble water containing a large amount of fine bubbles. Therefore, the washing liquid used in the washing process of step S11 contains a large amount of fine bubbles.

Here, the anionic (anion) surfactant as a main component of the detergent and the fine bubbles in the fine bubble water have a cleaning ability to remove dirt independently of each other. However, for example, when a detergent is dissolved in fine bubble water or the like to provide the concentrated detergent water with the fine bubble water, the surfactant in the detergent is adsorbed to the fine bubbles by an interaction of attractive force between molecules, which is called hydrophobic interaction, and thereby the surfactant is aggregated, that is, micelles are loosened and easily dispersed in the water. As a result, the surfactant is in a state of being easily reacted with dirt in a short time, and the cleaning ability is improved.

That is, the detergent is dissolved in the fine bubble water to generate the cleaning solution, whereby the surfactant in the detergent and the fine bubbles in the fine bubble water are brought into interaction with each other, and as a result, the cleaning performance can be remarkably improved as compared with a simple cleaning solution in which only the detergent is dissolved in tap water or a simple fine bubble water. Further, since dirt is easily emulsified and dispersed in water, an effect of preventing the dirt from being attached to the clothes again can be expected. For this reason, the cleaning liquid of the present embodiment has a higher cleaning ability than a cleaning liquid obtained by dissolving a detergent in ordinary tap water.

Then, when the controller 17 detects that a predetermined amount of water is poured into the tub 13 based on the detection result of the water level sensor 19, the two detergent side water inlet valves 24 are closed to stop the water pouring. The controller 17 continues driving of the motor 16 and continues the washing operation of the laundry until a predetermined period of time has elapsed. When the predetermined period of time has elapsed, the control device 17 stops the driving of the motor 16 and ends the washing process.

When the washing process is finished, the control device 17 executes the draining and dehydrating process of step S12. When the draining/dehydrating process is started, the control device 17 opens the drain valve 18 to drain the washing liquid stored in the tub 13. Then, when detecting that the washing liquid in the tub 13 is drained based on the detection result of the water level sensor 19, the controller 17 drives the motor 16 and a clutch mechanism, not shown, to rotate the tub 14 at a high speed. Thereby, the laundry in the tub 14 is dehydrated by the centrifugal force. When the predetermined period of time has elapsed, the controller 17 stops the driving of the motor 16 to end the drainage/dehydration process.

When the draining/dehydrating process is completed, the control device 17 executes the rinsing process of step S13. When the rinsing process of step S13 is started, the controller 17 opens the two detergent side water inlet valves 24 with the water discharge valve 18 closed, and injects rinsing water, which is rinsing water, into the water tub 13 and the spin tub 14 through the detergent side water supply path B. Thus, the fine bubble water containing a large amount of fine bubbles by the fine bubble generator 40 is supplied as the rinsing water into the water tub 13 and the tub 14. The controller 17 drives the motor 16 to rotate the pulsator 15 relative to the tub 14 in parallel with the water supply to the tub 13 and the tub 14. Thereby, the laundry in the tub 14 is agitated and the rinsing is performed.

Then, when the controller 17 detects that a predetermined amount of water is poured into the tub 13 based on the detection result of the water level sensor 19, the two detergent side water inlet valves 24 are closed to stop the water pouring. Then, the controller 17 continues driving the motor 16 and continues the rinsing operation of the laundry until a predetermined period of time elapses. When the predetermined period of time has elapsed, the controller 17 stops the driving of the motor 16 to end the rinsing process.

When the rinsing process is finished, the controller 17 executes the draining and dehydrating process in step S14 in the same manner as in step S12. The number of times of the rinsing process and the draining/dehydrating process performed before the final rinsing process of step S15 may be increased or decreased according to the amount of laundry, the preference of the user, and the like.

When the draining/dehydrating process of step S14 is completed, the control device 17 performs the final rinsing process of step S15. The final rinsing process is a rinsing process using the softener stored in the softener storage part 32. When the final rinsing process of step S15 is started, the controller 17 opens the two detergent side water inlet valves 24 with the water outlet valve 18 closed, and injects rinse water into the tub 13 and the tub 14 through the detergent side water supply path B. Thus, the fine bubble water containing a large amount of fine bubbles by the fine bubble generator 40 is poured into the water tub 13 and the tub 14 as the rinsing water.

Further, the controller 17 opens the softener side water valve 23 in a state where at least one of the two detergent side water valves 24 is opened, in this embodiment, in a state where the two detergent side water valves 24 are opened. Then, the softener contained in the softener containing portion 32 is flushed by the water passing through the softener-side water supply path a, and is put into the water tub 13 and the rotary tub 14. In the case of the present embodiment, the controller 17 opens the softener side water valve 23 simultaneously with the opening of the two detergent side water valves 24. In other words, in the present embodiment, in the water injection in the final rinsing process using the softener, a period during which the softener is supplied through the softener-side water supply path a and a period during which the fine bubble water is injected through the detergent-side water supply path B overlap at least partially.

Thus, the softener in the softener container 32 is thrown into the tub 13 and the tub 14 during the final rinsing process almost simultaneously with the injection of the fine bubble water into the tub 13 and the tub 14. Therefore, in the initial stage of the final rinsing process, that is, the stage of water injection, rinse water is generated in which fine bubble water and the softener are mixed. That is, according to this, the fine bubble water and the softener are mixed before only the fine bubble water or only the tap water in which the softener is dissolved is immersed into the laundry in the tub 14.

In the present embodiment, the detergent-side water supply path B and the softener-side water supply path a are merged at the downstream side of the softener storage portion 32 and in the cartridge main body 31. Therefore, during the final rinsing process using the conditioner, the conditioner passing through the conditioner-side water supply path a and the fine bubble water passing through the detergent-side water supply path B are injected from the water injection port 22 into the tub 13 and the tub 14 in a state of being mixed in the cartridge body 31.

Here, when a cationic (cation) surfactant, which is a main component of the softener, is dissolved in the fine bubble water, the surfactant in the solution is adsorbed to the fine bubbles by hydrophobic interaction, as in the case of the detergent, and therefore, the surfactant aggregates, that is, micelles are loosened and easily dispersed in the water. As a result, the surfactant is easily and efficiently adhered to the laundry in a short time, and the softening effect is improved. That is, by dissolving the softener in the fine bubble water, the interaction between the surfactant in the softener and the fine bubbles in the fine bubble water is exhibited, and as a result, the softener can act on the laundry with an improved softening effect as compared with the case where the softener is dissolved only in the tap water, and the effect of the softener can be remarkably improved by effectively imparting a fragrance or the like.

In addition, the control device 17 drives the motor 16 to rotate the pulsator 15 relative to the tub 14 in parallel with the water supply to the tub 13 and the tub 14. Thereby, the laundry in the rotary tub 14 is agitated, and the rinsing operation using the softener is performed. Then, when the controller 17 detects that a predetermined amount of water is filled into the water tub 13 based on the detection result of the water level sensor 19, the softener-side water inlet valve 23 and the detergent-side water inlet valve 24 are closed to stop the water filling.

Then, the controller 17 continues driving the motor 16 and continues the rinsing operation of the laundry until a predetermined period of time elapses. After that, when a predetermined period of time has elapsed, the controller 17 stops the driving of the motor 16 and ends the final rinsing process. When the final rinsing process is finished, the controller 17 executes the draining/dehydrating process of step S16 in the same manner as steps S12 and S14. Then, the drainage/dehydration process of step S16 is completed, and a series of processes related to the washing operation is completed.

According to the embodiment described above, the washing machine 10 includes the softener-side water supply path a, the detergent-side water supply path B, and the fine bubble generating device 40. The softener-side water supply path a is a water supply path from the connection port 21 to the water tub 13 and the rotary tub 14 from the water injection port 22 via the softener storage portion 32 in the cartridge main body 31. The detergent-side water supply path B is a water supply path from the connection port 21 to the water tub 13 and the tub 14 from the water filling port 22 via the detergent accommodating portion 33 in the cartridge body 31. The fine bubble generating device 40 is provided in the middle of the detergent-side water supply path B, and causes water passing through the inside to contain fine bubbles.

In addition, the fine bubble generating device 40 is not provided in the softener-side water supply path a. In the final rinsing process using the conditioner contained in the conditioner storage part 32, water from the external water supply source is injected into the tub 13 and the tub 14 through the conditioner side water supply path a in a state where the water from the external water supply source is injected into the tub 13 and the tub 14 through the detergent side water supply path B. That is, in the final rinse, during the filling period in which the rinse water is filled into the water tub 13 and the spin tub 14, the period in which the softener side water inlet valve 23 is opened and the softener is supplied and the period in which the detergent side water inlet valve 24 is opened and the fine bubble water is filled overlap at least partially.

Accordingly, the fine bubble water can be mixed with the softener at the initial stage of the final rinsing process, that is, at the stage of water injection. In other words, in the rinsing process using the softener, the fine bubble water can be mixed with the softener before the softener, which is fed into the water tub 13 and the spin basket 14 in a high concentration state through the softener-side water supply path a having a small flow rate, is immersed into the laundry in the spin basket 14. This can dissociate micelles of the surfactant contained in the softener, and can efficiently disperse the surfactant in the rinse liquid. As a result, the synergistic effect of the fine bubble water and the softener can be exhibited, and the action of the softener on the laundry can be efficiently exhibited.

The softener-side water supply path a and the detergent-side water supply path B are merged in the cartridge main body 31 on the downstream side of the softener storage portion 32. According to this configuration, the softener stored in the softener storage portion 32 is flushed from the softener storage portion 32 by the water passing through the softener-side water supply path a during the water injection in the final rinsing process using the softener, and then mixed with the fine bubble water passing through the detergent-side water supply path B in the cartridge main body 31, and in this state, the water is injected from the water injection port 22 into the water tub 13 and the water tub 14.

Accordingly, the rinse liquid in which the fine bubble water and the softener are mixed in advance can be injected into the water tub 13 and the rotary tub 14 from the initial stage of the water injection in the final rinse process. Therefore, the laundry can be prevented from being locally or unevenly soaked into the laundry when the softener is fed into the tub 13 and the tub 14 in a state of high concentration. As a result, the softener can be more efficiently used for laundry.

Here, the fine bubble generating apparatus 40 of the present embodiment partially throttles the water passing through the inside, thereby precipitating fine bubbles in the water. Therefore, if the fine bubble generating device 40 is provided in the middle of the detergent-side water supply path B, the amount of water to be poured from the detergent-side water supply path B into the water tub 13 and the tub 14 is reduced, and as a result, the water pouring time is lengthened. Therefore, the washing machine 10 of the present embodiment includes two detergent-side water supply paths B. Accordingly, the washing machine 10 can increase the amount of generated fine bubbles while compensating for the decrease in the flow rate by the fine bubble generating device 40, and as a result, can suppress the extension of the water injection time due to the provision of the fine bubble generating device 40.

The fine bubble generating device 40 may be provided in at least one of the two detergent-side water supply paths B. For example, as shown in fig. 10, the fine bubble generating device 40 may be provided in one of the two detergent-side water supply paths B, and the fine bubble generating device 40 may not be provided in the other.

Accordingly, the concentration of the fine bubbles contained in the fine bubble water is reduced, and therefore, the cleaning performance in the washing process using the detergent and the rinsing performance in the final rinsing process using the softener are slightly inferior to those of the above embodiment, but the same operational effects as those of the above embodiment can be obtained. Further, according to the example of fig. 10, since the flow rate can be prevented from being reduced by the provision of the fine bubble generating device 40 in the detergent side water supply path B in which the fine bubble generating device 40 is not provided, the water supply time in the washing process and the rinsing process can be further shortened as compared with the above-described embodiment.

(second embodiment)

Next, a second embodiment will be described with reference to fig. 11 to 14.

The washing machine 10 of the present embodiment includes a first detergent-side water supply path B1 and a second detergent-side water supply path B2 as detergent-side water supply paths. The washing machine 10 of the present embodiment includes a first detergent side water inlet valve 241 and a second detergent side water inlet valve 242 as detergent side water inlet valves. The washing machine 10 of the present embodiment includes a first fine bubble generating device 401 and a second fine bubble generating device 402 as fine bubble generating devices.

The first detergent side water supply path B1 and the second detergent side water supply path B2 are paths from the connection port 21 to the tub 13 and the tub 14 through the detergent storage portion 33 in the cartridge body 31, similarly to the detergent side water supply path B of the first embodiment. The first and second detergent side water inlet valves 241 and 242 are liquid on-off valves that can be opened and closed electromagnetically, as in the detergent side water inlet valve 24 of the first embodiment, and are driven and controlled by the controller 17.

In this case, the first detergent side water feed valve 241 is provided in a middle portion of the first detergent side water feed path B1 and on the upstream side of the detergent storage part 33, and opens and closes the first detergent side water feed path B1. The second detergent side water feed valve 242 is provided in a middle portion of the second detergent side water feed path B2 and on the upstream side of the detergent storage unit 33, and opens and closes the second detergent side water feed path B2.

The first and second fine bubble generating devices 401 and 402 have the same structure as the fine bubble generating device 40 of the first embodiment, but have different capabilities. That is, the first fine bubble generating device 401 and the second fine bubble generating device 402 differ in the gap size L of the slits formed in the collision portion 70 shown in fig. 7.

In the following description, the gap size L of the slits in the first fine bubble generating device 401 is L1, and the gap size L of the slits in the second fine bubble generating device 402 is L2. In this case, as shown in fig. 12, the gap size L1 of the first fine bubble generating device 401 is set to, for example, the same value as the gap size L of the fine bubble generating device 40 of the first embodiment. The gap size L2 of the second fine bubble generating device 402 is set to 9 or less of the gap size L1 of the first fine bubble generating device 401. Specifically, in the present embodiment, the gap size L1 of the first fine bubble generating device 401 is set to 0.7mm, whereas the gap size L2 of the second fine bubble generating device 402 is set to 0.6 mm.

As the gap dimension L is decreased to decrease the area of the slit, in other words, as the area of the protrusion 70 through which water can pass is decreased, the number of fine bubbles generated increases, but the amount of water passing per unit time decreases. Therefore, the second fine bubble generating device 402 is set such that the generation capacity of fine bubbles is higher and the flow rate of water per unit time is smaller than that of the first fine bubble generating device 401.

Here, depending on the region in which the washing machine 10 is used, the water pressure of an external water supply source such as a tap water pipe may be unstable. Further, if the water pressure applied to the fine bubble generating devices 401 and 402 is lowered, there is a fear that the capability of the fine bubble generating devices 401 and 402 cannot be sufficiently exhibited. Therefore, in the washing machine 10 of the present embodiment, when the water is filled into the water tub 13 and the water tub 14, the combination of the open/closed states of the first and second detergent side water valves 241 and 242 is changed according to the water pressure of the external water supply source, in other words, according to the water pressure applied to the first and second detergent side water valves 241 and 242.

That is, as shown in fig. 13, the washing machine 10 of the present embodiment further includes a water pressure detection processing unit 171. The water pressure detection processing unit 171 functions as a water pressure detection means for detecting the pressure of the water supplied from the connection port 21, that is, the water pressure applied to the softener-side water valve 23, the first detergent-side water valve 241, and the second detergent-side water valve 242. In the present embodiment, the controller 17 monitors the water injection rate calculated from the water level detected by the water level sensor 19 and the opening time of each of the water feed valves 23, 241, and 242, and detects the water pressure applied to the softener side water feed valve 23, the first detergent side water feed valve 241, and the second detergent side water feed valve 242.

Specifically, for example, as shown in fig. 14, the washing machine 10 stores, as reference values, water injection speeds V1 and V2 when water is supplied from the connection port 21, for example, at a predetermined water pressure in accordance with the open/close state of the water inlet valves 23, 241, and 242. In this case, the predetermined water pressure is a value sufficient to exhibit the performance of each of the fine bubble generating devices 401 and 402, and is set to be 0.4MPa or less, which is a normal water pressure of a water supply pipe, for example.

That is, the predetermined water pressure is set to a value at which the performance of the fine bubble generating devices 401 and 402 cannot be sufficiently exhibited when the water pressure applied to the fine bubble generating devices 401 and 402 is equal to or lower than the predetermined water pressure. The water filling rate means the amount of water to be filled into the tub 13 and the tub 14 per unit time. The washing machine 10 may include a water pressure sensor for measuring the water pressure supplied to the connection port 21, instead of the water pressure detection processing unit 171 using the detection result of the water level sensor 19.

In the case of the present embodiment, in the washing process of step S11 and the rinsing process of step S13 in fig. 9, the water is injected by opening the detergent side water intake valves 241 and 242 with the drain valve 18 closed and the softener side water intake valve 23 closed. In addition, in the final rinsing process of step S15, the drain valve 18 is closed and the softener-side water inlet valve 23 and the detergent-side water inlet valves 241 and 242 are opened to perform water injection. Therefore, in the present embodiment, as shown in fig. 14, washing machine 10 stores water injection rate V1 in a state where softener side water inlet valve 23 is closed and detergent side water inlet valves 241 and 242 are opened, and water injection rate V2 in a state where softener side water inlet valve 23 and detergent side water inlet valves 241 and 242 are opened.

Next, the control content at the time of water injection will be described with reference to fig. 15. When the controller 17 starts water injection in the respective steps of steps S11, S13, and S15 in fig. 9 (start of fig. 15), the controller starts water injection in step T11. In this case, if water is injected in the washing step S11 and the rinsing step S13 of fig. 9, the controller 17 opens the detergent side water intake valves 241 and 242 with the softener side water intake valve 23 closed, and injects water. In addition, if the water is injected during the final rinse in step S15, the controller 17 opens the softener-side water inlet valve 23 and the detergent-side water inlet valves 241 and 242 to inject water.

When the water injection is started, the controller 17 determines in step T12 whether or not the water pressure applied to the softener-side water inlet valve 23 and the detergent-side water inlet valves 241 and 242 is equal to or lower than a predetermined value. Specifically, the control device 17 calculates the water filling rate into the tub 13 and the tub 14 based on the time from the start of water filling in step T11 and the current water level detected by the water level sensor 19. The controller 17 determines whether or not the calculated current water injection speed is equal to or lower than the water injection speeds V1 and V2 preset in accordance with the open/close states of the water feed valves 23, 241, and 242.

In this case, if the calculated current water injection rate exceeds the preset water injection rates V1 and V2, the controller 17 determines that a water pressure exceeding a predetermined value is applied to the water inlet valves 23, 241, and 242. On the other hand, when the calculated current water injection speed is equal to or lower than the preset water injection speeds V1 and V2, the controller 17 determines that the water pressure applied to the respective water inlet valves 23, 241, and 242 is equal to or lower than the predetermined value.

Specifically, if water is injected during the washing process in step S11 and the rinsing process in step S13 in fig. 9, the controller 17 determines that the water pressure applied to the detergent side water intake valves 241 and 242 is equal to or less than the predetermined value when the calculated current water injection rate is equal to or less than the water injection rate V1 shown in fig. 15. In addition, if the water is injected during the final rinsing in step S15, the controller 17 determines that the water pressure applied to the softener-side water valve 23 and the detergent- side water valves 241 and 242 is equal to or lower than the predetermined value when the calculated current water injection rate is equal to or lower than the water injection rate V2 shown in fig. 15.

If the water pressure drop is not detected (no in step T14 of fig. 15), the control device 17 does not execute step T13 and moves the process to step T14. On the other hand, if the water pressure drop is detected (yes in step T12), the control device 17 closes the first detergent side water inlet valve 241 in step T13. Thereby, the water pressure applied to the second detergent side water inlet valve 242 is increased. As a result, the number of fine bubbles generated in the second fine bubble generation device 402 can be suppressed from decreasing.

Thereafter, the control device 17 determines whether the water level in the tub 13 reaches a predetermined water level set in advance based on the detection result of the water level sensor 19 in step T14. If the water level has not reached the predetermined water level (no in step T14), the control device 17 returns the process to step T12, and repeats steps T12 to T14 until the water level reaches the predetermined water level. When the water level reaches the predetermined level (yes in step T14), the controller 17 closes the currently opened water inlet valves 23, 241, and 242 and ends the water injection in step T15. Thereby, a series of controls related to water injection ends (end).

As described above, according to the second embodiment, when the water is poured into the water tub 13 and the water tub 14, the controller 17 opens both the first detergent side water valve 241 and the second detergent side water valve 242 and pours the water when the water pressure applied to the first detergent side water valve 241 and the second detergent side water valve 242 exceeds a predetermined value. On the other hand, when the water pressure applied to the first detergent side water inlet valve 241 and the second detergent side water inlet valve 242 is equal to or lower than a predetermined value, the controller 17 opens the second detergent side water inlet valve 242 with the first detergent side water inlet valve 241 closed, and injects water.

Accordingly, when the water pressure of the external water supply source is sufficiently high, both the first detergent side water inlet valve 241 and the second detergent side water inlet valve 242 are opened to inject water, so that a large flow rate can be secured and the water injection time can be shortened. In addition, when the water pressure of the external water supply source is low, the first detergent side water inlet valve 241 is closed, so that the water pressure applied to the second fine bubble generation device 402 can be prevented from being reduced. As a result, at least the generation amount of the fine bubbles generated from the second fine bubble generation device 402 can be ensured.

In the present embodiment, the second fine bubble generating device 402 is set to have a higher fine bubble generating capability than the first fine bubble generating device 401. In other words, if the applied water pressure is the same, the second fine bubble generating device 402 can generate more fine bubbles than the first fine bubble generating device 401. Accordingly, even when the water pressure of the external water supply source is low, the concentration of fine bubbles contained in the water injected into the tub 13 and the tub 14 can be prevented from being extremely reduced.

In the above embodiments, the terms "first" and "second" are conveniently used to distinguish between structures having the same function, and are not intended to indicate any order of priority.

The fine bubble generating means 40, 401, 402 is not limited to the principle of using the venturi tube.

The above embodiments can be combined as appropriate as needed.

Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof.

Claims (4)

1. A washing machine is provided with:

a water containing barrel;

a rotary tub rotatably provided in the water tub;

a connection port connected to an external water supply source;

a water injection cartridge having a cartridge main body connected to the connection port and into which water from the water supply source flows, a softener storage part provided in the cartridge main body and storing a softener, and a detergent storage part provided in the cartridge main body and storing a detergent;

a softener-side water supply path from the connection port to the water tub and the rotary tub via the softener accommodating portion in the cartridge main body;

a detergent-side water supply path from the connection port to the tub and the tub through the detergent accommodating part in the cartridge body; and

a fine bubble generating device provided in the detergent side water supply path and including fine bubbles in water passing through the detergent side water supply path,

the micro-bubble generating device is not arranged on the softener side water supply path,

the rinsing process using the softener contained in the softener containing part comprises the following steps: during the water from the water supply source is filled into the tub or the tub through the conditioner side water supply path in a state in which the water from the water supply source is filled into the tub or the tub through the detergent side water supply path.

2. The washing machine as claimed in claim 1, wherein,

the softener-side water supply path and the detergent-side water supply path are on the downstream side of the softener storage portion and merge inside the cartridge main body.

3. The washing machine as claimed in claim 1 or 2,

a first detergent side water supply path and a second detergent side water supply path as the detergent side water supply path,

and a first fine bubble generating means provided in the first detergent side water supply path and a second fine bubble generating means provided in the second detergent side water supply path as the fine bubble generating means,

further provided with:

a first detergent side water supply valve provided in the first detergent side water supply path and upstream of the detergent storage part;

a second detergent side water supply valve provided in the second detergent side water supply path and upstream of the detergent storage part; and

a control device for monitoring the water injection speed of the first and second detergent side water inlet valves and controlling the opening and closing of the first and second detergent side water inlet valves,

when water is injected into the water containing barrel and the rotary barrel, the control device opens the first detergent side water inlet valve and the second detergent side water inlet valve to inject water under the condition that the water injection speed of the first detergent side water inlet valve and the water injection speed of the second detergent side water inlet valve exceed a specified value, and the control device opens the second detergent side water inlet valve to inject water under the condition that the water injection speed of the first detergent side water inlet valve and the water injection speed of the second detergent side water inlet valve are below the specified value in the state that the first detergent side water inlet valve is closed.

4. The washing machine as claimed in claim 3, wherein,

the second fine bubble generating means is set to have a higher capability of generating the fine bubbles than the first fine bubble generating means.

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